M: linux@arm.linux.org.uk
F: include/linux/clk.h
+CISCO FCOE HBA DRIVER
+P: Abhijeet Joglekar
+M: abjoglek@cisco.com
+P: Joe Eykholt
+M: jeykholt@cisco.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+
CODA FILE SYSTEM
P: Jan Harkes
M: jaharkes@cs.cmu.edu
---help---
Fibre Channel over Ethernet module
+config FCOE_FNIC
+ tristate "Cisco FNIC Driver"
+ depends on PCI && X86
+ select LIBFC
+ help
+ This is support for the Cisco PCI-Express FCoE HBA.
+
+ To compile this driver as a module, choose M here and read
+ <file:Documentation/scsi/scsi.txt>.
+ The module will be called fnic.
+
config SCSI_DMX3191D
tristate "DMX3191D SCSI support"
depends on PCI && SCSI
obj-$(CONFIG_LIBFC) += libfc/
obj-$(CONFIG_LIBFCOE) += fcoe/
obj-$(CONFIG_FCOE) += fcoe/
+obj-$(CONFIG_FCOE_FNIC) += fnic/
obj-$(CONFIG_ISCSI_TCP) += libiscsi.o libiscsi_tcp.o iscsi_tcp.o
obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o
obj-$(CONFIG_SCSI_A4000T) += 53c700.o a4000t.o
--- /dev/null
+obj-$(CONFIG_FCOE_FNIC) += fnic.o
+
+fnic-y := \
+ fnic_attrs.o \
+ fnic_isr.o \
+ fnic_main.o \
+ fnic_res.o \
+ fnic_fcs.o \
+ fnic_scsi.o \
+ vnic_cq.o \
+ vnic_dev.o \
+ vnic_intr.o \
+ vnic_rq.o \
+ vnic_wq_copy.o \
+ vnic_wq.o
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _CQ_DESC_H_
+#define _CQ_DESC_H_
+
+/*
+ * Completion queue descriptor types
+ */
+enum cq_desc_types {
+ CQ_DESC_TYPE_WQ_ENET = 0,
+ CQ_DESC_TYPE_DESC_COPY = 1,
+ CQ_DESC_TYPE_WQ_EXCH = 2,
+ CQ_DESC_TYPE_RQ_ENET = 3,
+ CQ_DESC_TYPE_RQ_FCP = 4,
+};
+
+/* Completion queue descriptor: 16B
+ *
+ * All completion queues have this basic layout. The
+ * type_specfic area is unique for each completion
+ * queue type.
+ */
+struct cq_desc {
+ __le16 completed_index;
+ __le16 q_number;
+ u8 type_specfic[11];
+ u8 type_color;
+};
+
+#define CQ_DESC_TYPE_BITS 4
+#define CQ_DESC_TYPE_MASK ((1 << CQ_DESC_TYPE_BITS) - 1)
+#define CQ_DESC_COLOR_MASK 1
+#define CQ_DESC_COLOR_SHIFT 7
+#define CQ_DESC_Q_NUM_BITS 10
+#define CQ_DESC_Q_NUM_MASK ((1 << CQ_DESC_Q_NUM_BITS) - 1)
+#define CQ_DESC_COMP_NDX_BITS 12
+#define CQ_DESC_COMP_NDX_MASK ((1 << CQ_DESC_COMP_NDX_BITS) - 1)
+
+static inline void cq_desc_dec(const struct cq_desc *desc_arg,
+ u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
+{
+ const struct cq_desc *desc = desc_arg;
+ const u8 type_color = desc->type_color;
+
+ *color = (type_color >> CQ_DESC_COLOR_SHIFT) & CQ_DESC_COLOR_MASK;
+
+ /*
+ * Make sure color bit is read from desc *before* other fields
+ * are read from desc. Hardware guarantees color bit is last
+ * bit (byte) written. Adding the rmb() prevents the compiler
+ * and/or CPU from reordering the reads which would potentially
+ * result in reading stale values.
+ */
+
+ rmb();
+
+ *type = type_color & CQ_DESC_TYPE_MASK;
+ *q_number = le16_to_cpu(desc->q_number) & CQ_DESC_Q_NUM_MASK;
+ *completed_index = le16_to_cpu(desc->completed_index) &
+ CQ_DESC_COMP_NDX_MASK;
+}
+
+#endif /* _CQ_DESC_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _CQ_ENET_DESC_H_
+#define _CQ_ENET_DESC_H_
+
+#include "cq_desc.h"
+
+/* Ethernet completion queue descriptor: 16B */
+struct cq_enet_wq_desc {
+ __le16 completed_index;
+ __le16 q_number;
+ u8 reserved[11];
+ u8 type_color;
+};
+
+static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
+ u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
+{
+ cq_desc_dec((struct cq_desc *)desc, type,
+ color, q_number, completed_index);
+}
+
+/* Completion queue descriptor: Ethernet receive queue, 16B */
+struct cq_enet_rq_desc {
+ __le16 completed_index_flags;
+ __le16 q_number_rss_type_flags;
+ __le32 rss_hash;
+ __le16 bytes_written_flags;
+ __le16 vlan;
+ __le16 checksum_fcoe;
+ u8 flags;
+ u8 type_color;
+};
+
+#define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT (0x1 << 12)
+#define CQ_ENET_RQ_DESC_FLAGS_FCOE (0x1 << 13)
+#define CQ_ENET_RQ_DESC_FLAGS_EOP (0x1 << 14)
+#define CQ_ENET_RQ_DESC_FLAGS_SOP (0x1 << 15)
+
+#define CQ_ENET_RQ_DESC_RSS_TYPE_BITS 4
+#define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
+ ((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
+#define CQ_ENET_RQ_DESC_RSS_TYPE_NONE 0
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4 1
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4 2
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6 3
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6 4
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX 5
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX 6
+
+#define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC (0x1 << 14)
+
+#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS 14
+#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
+ ((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED (0x1 << 14)
+#define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED (0x1 << 15)
+
+#define CQ_ENET_RQ_DESC_FCOE_SOF_BITS 4
+#define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
+ ((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FCOE_EOF_BITS 8
+#define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
+ ((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT 8
+
+#define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK (0x1 << 0)
+#define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK (0x1 << 0)
+#define CQ_ENET_RQ_DESC_FLAGS_UDP (0x1 << 1)
+#define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR (0x1 << 1)
+#define CQ_ENET_RQ_DESC_FLAGS_TCP (0x1 << 2)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK (0x1 << 3)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV6 (0x1 << 4)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4 (0x1 << 5)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT (0x1 << 6)
+#define CQ_ENET_RQ_DESC_FLAGS_FCS_OK (0x1 << 7)
+
+static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
+ u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
+ u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
+ u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
+ u8 *vlan_stripped, u16 *vlan, u16 *checksum, u8 *fcoe_sof,
+ u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
+ u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
+ u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
+{
+ u16 completed_index_flags = le16_to_cpu(desc->completed_index_flags);
+ u16 q_number_rss_type_flags =
+ le16_to_cpu(desc->q_number_rss_type_flags);
+ u16 bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
+
+ cq_desc_dec((struct cq_desc *)desc, type,
+ color, q_number, completed_index);
+
+ *ingress_port = (completed_index_flags &
+ CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
+ *fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
+ 1 : 0;
+ *eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
+ 1 : 0;
+ *sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
+ 1 : 0;
+
+ *rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
+ CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
+ *csum_not_calc = (q_number_rss_type_flags &
+ CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
+
+ *rss_hash = le32_to_cpu(desc->rss_hash);
+
+ *bytes_written = bytes_written_flags &
+ CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
+ *packet_error = (bytes_written_flags &
+ CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
+ *vlan_stripped = (bytes_written_flags &
+ CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
+
+ *vlan = le16_to_cpu(desc->vlan);
+
+ if (*fcoe) {
+ *fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
+ CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
+ *fcoe_fc_crc_ok = (desc->flags &
+ CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
+ *fcoe_enc_error = (desc->flags &
+ CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
+ *fcoe_eof = (u8)((desc->checksum_fcoe >>
+ CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
+ CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
+ *checksum = 0;
+ } else {
+ *fcoe_sof = 0;
+ *fcoe_fc_crc_ok = 0;
+ *fcoe_enc_error = 0;
+ *fcoe_eof = 0;
+ *checksum = le16_to_cpu(desc->checksum_fcoe);
+ }
+
+ *tcp_udp_csum_ok =
+ (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
+ *udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
+ *tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
+ *ipv4_csum_ok =
+ (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
+ *ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
+ *ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
+ *ipv4_fragment =
+ (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
+ *fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
+}
+
+#endif /* _CQ_ENET_DESC_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _CQ_EXCH_DESC_H_
+#define _CQ_EXCH_DESC_H_
+
+#include "cq_desc.h"
+
+/* Exchange completion queue descriptor: 16B */
+struct cq_exch_wq_desc {
+ u16 completed_index;
+ u16 q_number;
+ u16 exchange_id;
+ u8 tmpl;
+ u8 reserved0;
+ u32 reserved1;
+ u8 exch_status;
+ u8 reserved2[2];
+ u8 type_color;
+};
+
+#define CQ_EXCH_WQ_STATUS_BITS 2
+#define CQ_EXCH_WQ_STATUS_MASK ((1 << CQ_EXCH_WQ_STATUS_BITS) - 1)
+
+enum cq_exch_status_types {
+ CQ_EXCH_WQ_STATUS_TYPE_COMPLETE = 0,
+ CQ_EXCH_WQ_STATUS_TYPE_ABORT = 1,
+ CQ_EXCH_WQ_STATUS_TYPE_SGL_EOF = 2,
+ CQ_EXCH_WQ_STATUS_TYPE_TMPL_ERR = 3,
+};
+
+static inline void cq_exch_wq_desc_dec(struct cq_exch_wq_desc *desc_ptr,
+ u8 *type,
+ u8 *color,
+ u16 *q_number,
+ u16 *completed_index,
+ u8 *exch_status)
+{
+ cq_desc_dec((struct cq_desc *)desc_ptr, type,
+ color, q_number, completed_index);
+ *exch_status = desc_ptr->exch_status & CQ_EXCH_WQ_STATUS_MASK;
+}
+
+struct cq_fcp_rq_desc {
+ u16 completed_index_eop_sop_prt;
+ u16 q_number;
+ u16 exchange_id;
+ u16 tmpl;
+ u16 bytes_written;
+ u16 vlan;
+ u8 sof;
+ u8 eof;
+ u8 fcs_fer_fck;
+ u8 type_color;
+};
+
+#define CQ_FCP_RQ_DESC_FLAGS_SOP (1 << 15)
+#define CQ_FCP_RQ_DESC_FLAGS_EOP (1 << 14)
+#define CQ_FCP_RQ_DESC_FLAGS_PRT (1 << 12)
+#define CQ_FCP_RQ_DESC_TMPL_MASK 0x1f
+#define CQ_FCP_RQ_DESC_BYTES_WRITTEN_MASK 0x3fff
+#define CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT 14
+#define CQ_FCP_RQ_DESC_PACKET_ERR_MASK (1 << CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT)
+#define CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT 15
+#define CQ_FCP_RQ_DESC_VS_STRIPPED_MASK (1 << CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT)
+#define CQ_FCP_RQ_DESC_FC_CRC_OK_MASK 0x1
+#define CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT 1
+#define CQ_FCP_RQ_DESC_FCOE_ERR_MASK (1 << CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT)
+#define CQ_FCP_RQ_DESC_FCS_OK_SHIFT 7
+#define CQ_FCP_RQ_DESC_FCS_OK_MASK (1 << CQ_FCP_RQ_DESC_FCS_OK_SHIFT)
+
+static inline void cq_fcp_rq_desc_dec(struct cq_fcp_rq_desc *desc_ptr,
+ u8 *type,
+ u8 *color,
+ u16 *q_number,
+ u16 *completed_index,
+ u8 *eop,
+ u8 *sop,
+ u8 *fck,
+ u16 *exchange_id,
+ u16 *tmpl,
+ u32 *bytes_written,
+ u8 *sof,
+ u8 *eof,
+ u8 *ingress_port,
+ u8 *packet_err,
+ u8 *fcoe_err,
+ u8 *fcs_ok,
+ u8 *vlan_stripped,
+ u16 *vlan)
+{
+ cq_desc_dec((struct cq_desc *)desc_ptr, type,
+ color, q_number, completed_index);
+ *eop = (desc_ptr->completed_index_eop_sop_prt &
+ CQ_FCP_RQ_DESC_FLAGS_EOP) ? 1 : 0;
+ *sop = (desc_ptr->completed_index_eop_sop_prt &
+ CQ_FCP_RQ_DESC_FLAGS_SOP) ? 1 : 0;
+ *ingress_port =
+ (desc_ptr->completed_index_eop_sop_prt &
+ CQ_FCP_RQ_DESC_FLAGS_PRT) ? 1 : 0;
+ *exchange_id = desc_ptr->exchange_id;
+ *tmpl = desc_ptr->tmpl & CQ_FCP_RQ_DESC_TMPL_MASK;
+ *bytes_written =
+ desc_ptr->bytes_written & CQ_FCP_RQ_DESC_BYTES_WRITTEN_MASK;
+ *packet_err =
+ (desc_ptr->bytes_written & CQ_FCP_RQ_DESC_PACKET_ERR_MASK) >>
+ CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT;
+ *vlan_stripped =
+ (desc_ptr->bytes_written & CQ_FCP_RQ_DESC_VS_STRIPPED_MASK) >>
+ CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT;
+ *vlan = desc_ptr->vlan;
+ *sof = desc_ptr->sof;
+ *fck = desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FC_CRC_OK_MASK;
+ *fcoe_err = (desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FCOE_ERR_MASK) >>
+ CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT;
+ *eof = desc_ptr->eof;
+ *fcs_ok =
+ (desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FCS_OK_MASK) >>
+ CQ_FCP_RQ_DESC_FCS_OK_SHIFT;
+}
+
+struct cq_sgl_desc {
+ u16 exchange_id;
+ u16 q_number;
+ u32 active_burst_offset;
+ u32 tot_data_bytes;
+ u16 tmpl;
+ u8 sgl_err;
+ u8 type_color;
+};
+
+enum cq_sgl_err_types {
+ CQ_SGL_ERR_NO_ERROR = 0,
+ CQ_SGL_ERR_OVERFLOW, /* data ran beyond end of SGL */
+ CQ_SGL_ERR_SGL_LCL_ADDR_ERR, /* sgl access to local vnic addr illegal*/
+ CQ_SGL_ERR_ADDR_RSP_ERR, /* sgl address error */
+ CQ_SGL_ERR_DATA_RSP_ERR, /* sgl data rsp error */
+ CQ_SGL_ERR_CNT_ZERO_ERR, /* SGL count is 0 */
+ CQ_SGL_ERR_CNT_MAX_ERR, /* SGL count is larger than supported */
+ CQ_SGL_ERR_ORDER_ERR, /* frames recv on both ports, order err */
+ CQ_SGL_ERR_DATA_LCL_ADDR_ERR,/* sgl data buf to local vnic addr ill */
+ CQ_SGL_ERR_HOST_CQ_ERR, /* host cq entry to local vnic addr ill */
+};
+
+#define CQ_SGL_SGL_ERR_MASK 0x1f
+#define CQ_SGL_TMPL_MASK 0x1f
+
+static inline void cq_sgl_desc_dec(struct cq_sgl_desc *desc_ptr,
+ u8 *type,
+ u8 *color,
+ u16 *q_number,
+ u16 *exchange_id,
+ u32 *active_burst_offset,
+ u32 *tot_data_bytes,
+ u16 *tmpl,
+ u8 *sgl_err)
+{
+ /* Cheat a little by assuming exchange_id is the same as completed
+ index */
+ cq_desc_dec((struct cq_desc *)desc_ptr, type, color, q_number,
+ exchange_id);
+ *active_burst_offset = desc_ptr->active_burst_offset;
+ *tot_data_bytes = desc_ptr->tot_data_bytes;
+ *tmpl = desc_ptr->tmpl & CQ_SGL_TMPL_MASK;
+ *sgl_err = desc_ptr->sgl_err & CQ_SGL_SGL_ERR_MASK;
+}
+
+#endif /* _CQ_EXCH_DESC_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FCPIO_H_
+#define _FCPIO_H_
+
+#include <linux/if_ether.h>
+
+/*
+ * This header file includes all of the data structures used for
+ * communication by the host driver to the fcp firmware.
+ */
+
+/*
+ * Exchange and sequence id space allocated to the host driver
+ */
+#define FCPIO_HOST_EXCH_RANGE_START 0x1000
+#define FCPIO_HOST_EXCH_RANGE_END 0x1fff
+#define FCPIO_HOST_SEQ_ID_RANGE_START 0x80
+#define FCPIO_HOST_SEQ_ID_RANGE_END 0xff
+
+/*
+ * Command entry type
+ */
+enum fcpio_type {
+ /*
+ * Initiator request types
+ */
+ FCPIO_ICMND_16 = 0x1,
+ FCPIO_ICMND_32,
+ FCPIO_ICMND_CMPL,
+ FCPIO_ITMF,
+ FCPIO_ITMF_CMPL,
+
+ /*
+ * Target request types
+ */
+ FCPIO_TCMND_16 = 0x11,
+ FCPIO_TCMND_32,
+ FCPIO_TDATA,
+ FCPIO_TXRDY,
+ FCPIO_TRSP,
+ FCPIO_TDRSP_CMPL,
+ FCPIO_TTMF,
+ FCPIO_TTMF_ACK,
+ FCPIO_TABORT,
+ FCPIO_TABORT_CMPL,
+
+ /*
+ * Misc request types
+ */
+ FCPIO_ACK = 0x20,
+ FCPIO_RESET,
+ FCPIO_RESET_CMPL,
+ FCPIO_FLOGI_REG,
+ FCPIO_FLOGI_REG_CMPL,
+ FCPIO_ECHO,
+ FCPIO_ECHO_CMPL,
+ FCPIO_LUNMAP_CHNG,
+ FCPIO_LUNMAP_REQ,
+ FCPIO_LUNMAP_REQ_CMPL,
+ FCPIO_FLOGI_FIP_REG,
+ FCPIO_FLOGI_FIP_REG_CMPL,
+};
+
+/*
+ * Header status codes from the firmware
+ */
+enum fcpio_status {
+ FCPIO_SUCCESS = 0, /* request was successful */
+
+ /*
+ * If a request to the firmware is rejected, the original request
+ * header will be returned with the status set to one of the following:
+ */
+ FCPIO_INVALID_HEADER, /* header contains invalid data */
+ FCPIO_OUT_OF_RESOURCE, /* out of resources to complete request */
+ FCPIO_INVALID_PARAM, /* some parameter in request is invalid */
+ FCPIO_REQ_NOT_SUPPORTED, /* request type is not supported */
+ FCPIO_IO_NOT_FOUND, /* requested I/O was not found */
+
+ /*
+ * Once a request is processed, the firmware will usually return
+ * a cmpl message type. In cases where errors occurred,
+ * the header status field would be filled in with one of the following:
+ */
+ FCPIO_ABORTED = 0x41, /* request was aborted */
+ FCPIO_TIMEOUT, /* request was timed out */
+ FCPIO_SGL_INVALID, /* request was aborted due to sgl error */
+ FCPIO_MSS_INVALID, /* request was aborted due to mss error */
+ FCPIO_DATA_CNT_MISMATCH, /* recv/sent more/less data than exp. */
+ FCPIO_FW_ERR, /* request was terminated due to fw error */
+ FCPIO_ITMF_REJECTED, /* itmf req was rejected by remote node */
+ FCPIO_ITMF_FAILED, /* itmf req was failed by remote node */
+ FCPIO_ITMF_INCORRECT_LUN, /* itmf req targeted incorrect LUN */
+ FCPIO_CMND_REJECTED, /* request was invalid and rejected */
+ FCPIO_NO_PATH_AVAIL, /* no paths to the lun was available */
+ FCPIO_PATH_FAILED, /* i/o sent to current path failed */
+ FCPIO_LUNMAP_CHNG_PEND, /* i/o rejected due to lunmap change */
+};
+
+/*
+ * The header command tag. All host requests will use the "tag" field
+ * to mark commands with a unique tag. When the firmware responds to
+ * a host request, it will copy the tag field into the response.
+ *
+ * The only firmware requests that will use the rx_id/ox_id fields instead
+ * of the tag field will be the target command and target task management
+ * requests. These two requests do not have corresponding host requests
+ * since they come directly from the FC initiator on the network.
+ */
+struct fcpio_tag {
+ union {
+ u32 req_id;
+ struct {
+ u16 rx_id;
+ u16 ox_id;
+ } ex_id;
+ } u;
+};
+
+static inline void
+fcpio_tag_id_enc(struct fcpio_tag *tag, u32 id)
+{
+ tag->u.req_id = id;
+}
+
+static inline void
+fcpio_tag_id_dec(struct fcpio_tag *tag, u32 *id)
+{
+ *id = tag->u.req_id;
+}
+
+static inline void
+fcpio_tag_exid_enc(struct fcpio_tag *tag, u16 ox_id, u16 rx_id)
+{
+ tag->u.ex_id.rx_id = rx_id;
+ tag->u.ex_id.ox_id = ox_id;
+}
+
+static inline void
+fcpio_tag_exid_dec(struct fcpio_tag *tag, u16 *ox_id, u16 *rx_id)
+{
+ *rx_id = tag->u.ex_id.rx_id;
+ *ox_id = tag->u.ex_id.ox_id;
+}
+
+/*
+ * The header for an fcpio request, whether from the firmware or from the
+ * host driver
+ */
+struct fcpio_header {
+ u8 type; /* enum fcpio_type */
+ u8 status; /* header status entry */
+ u16 _resvd; /* reserved */
+ struct fcpio_tag tag; /* header tag */
+};
+
+static inline void
+fcpio_header_enc(struct fcpio_header *hdr,
+ u8 type, u8 status,
+ struct fcpio_tag tag)
+{
+ hdr->type = type;
+ hdr->status = status;
+ hdr->_resvd = 0;
+ hdr->tag = tag;
+}
+
+static inline void
+fcpio_header_dec(struct fcpio_header *hdr,
+ u8 *type, u8 *status,
+ struct fcpio_tag *tag)
+{
+ *type = hdr->type;
+ *status = hdr->status;
+ *tag = hdr->tag;
+}
+
+#define CDB_16 16
+#define CDB_32 32
+#define LUN_ADDRESS 8
+
+/*
+ * fcpio_icmnd_16: host -> firmware request
+ *
+ * used for sending out an initiator SCSI 16-byte command
+ */
+struct fcpio_icmnd_16 {
+ u32 lunmap_id; /* index into lunmap table */
+ u8 special_req_flags; /* special exchange request flags */
+ u8 _resvd0[3]; /* reserved */
+ u32 sgl_cnt; /* scatter-gather list count */
+ u32 sense_len; /* sense buffer length */
+ u64 sgl_addr; /* scatter-gather list addr */
+ u64 sense_addr; /* sense buffer address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 pri_ta; /* SCSI Priority and Task attribute */
+ u8 _resvd1; /* reserved: should be 0 */
+ u8 flags; /* command flags */
+ u8 scsi_cdb[CDB_16]; /* SCSI Cmnd Descriptor Block */
+ u32 data_len; /* length of data expected */
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 _resvd2; /* reserved */
+ u8 d_id[3]; /* FC vNIC only: Target D_ID */
+ u16 mss; /* FC vNIC only: max burst */
+ u16 _resvd3; /* reserved */
+ u32 r_a_tov; /* FC vNIC only: Res. Alloc Timeout */
+ u32 e_d_tov; /* FC vNIC only: Err Detect Timeout */
+};
+
+/*
+ * Special request flags
+ */
+#define FCPIO_ICMND_SRFLAG_RETRY 0x01 /* Enable Retry handling on exchange */
+
+/*
+ * Priority/Task Attribute settings
+ */
+#define FCPIO_ICMND_PTA_SIMPLE 0 /* simple task attribute */
+#define FCPIO_ICMND_PTA_HEADQ 1 /* head of queue task attribute */
+#define FCPIO_ICMND_PTA_ORDERED 2 /* ordered task attribute */
+#define FCPIO_ICMND_PTA_ACA 4 /* auto contingent allegiance */
+#define FCPIO_ICMND_PRI_SHIFT 3 /* priority field starts in bit 3 */
+
+/*
+ * Command flags
+ */
+#define FCPIO_ICMND_RDDATA 0x02 /* read data */
+#define FCPIO_ICMND_WRDATA 0x01 /* write data */
+
+/*
+ * fcpio_icmnd_32: host -> firmware request
+ *
+ * used for sending out an initiator SCSI 32-byte command
+ */
+struct fcpio_icmnd_32 {
+ u32 lunmap_id; /* index into lunmap table */
+ u8 special_req_flags; /* special exchange request flags */
+ u8 _resvd0[3]; /* reserved */
+ u32 sgl_cnt; /* scatter-gather list count */
+ u32 sense_len; /* sense buffer length */
+ u64 sgl_addr; /* scatter-gather list addr */
+ u64 sense_addr; /* sense buffer address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 pri_ta; /* SCSI Priority and Task attribute */
+ u8 _resvd1; /* reserved: should be 0 */
+ u8 flags; /* command flags */
+ u8 scsi_cdb[CDB_32]; /* SCSI Cmnd Descriptor Block */
+ u32 data_len; /* length of data expected */
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 _resvd2; /* reserved */
+ u8 d_id[3]; /* FC vNIC only: Target D_ID */
+ u16 mss; /* FC vNIC only: max burst */
+ u16 _resvd3; /* reserved */
+ u32 r_a_tov; /* FC vNIC only: Res. Alloc Timeout */
+ u32 e_d_tov; /* FC vNIC only: Error Detect Timeout */
+};
+
+/*
+ * fcpio_itmf: host -> firmware request
+ *
+ * used for requesting the firmware to abort a request and/or send out
+ * a task management function
+ *
+ * The t_tag field is only needed when the request type is ABT_TASK.
+ */
+struct fcpio_itmf {
+ u32 lunmap_id; /* index into lunmap table */
+ u32 tm_req; /* SCSI Task Management request */
+ u32 t_tag; /* header tag of fcpio to be aborted */
+ u32 _resvd; /* _reserved */
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 _resvd1; /* reserved */
+ u8 d_id[3]; /* FC vNIC only: Target D_ID */
+ u32 r_a_tov; /* FC vNIC only: R_A_TOV in msec */
+ u32 e_d_tov; /* FC vNIC only: E_D_TOV in msec */
+};
+
+/*
+ * Task Management request
+ */
+enum fcpio_itmf_tm_req_type {
+ FCPIO_ITMF_ABT_TASK_TERM = 0x01, /* abort task and terminate */
+ FCPIO_ITMF_ABT_TASK, /* abort task and issue abts */
+ FCPIO_ITMF_ABT_TASK_SET, /* abort task set */
+ FCPIO_ITMF_CLR_TASK_SET, /* clear task set */
+ FCPIO_ITMF_LUN_RESET, /* logical unit reset task mgmt */
+ FCPIO_ITMF_CLR_ACA, /* Clear ACA condition */
+};
+
+/*
+ * fcpio_tdata: host -> firmware request
+ *
+ * used for requesting the firmware to send out a read data transfer for a
+ * target command
+ */
+struct fcpio_tdata {
+ u16 rx_id; /* FC rx_id of target command */
+ u16 flags; /* command flags */
+ u32 rel_offset; /* data sequence relative offset */
+ u32 sgl_cnt; /* scatter-gather list count */
+ u32 data_len; /* length of data expected to send */
+ u64 sgl_addr; /* scatter-gather list address */
+};
+
+/*
+ * Command flags
+ */
+#define FCPIO_TDATA_SCSI_RSP 0x01 /* send a scsi resp. after last frame */
+
+/*
+ * fcpio_txrdy: host -> firmware request
+ *
+ * used for requesting the firmware to send out a write data transfer for a
+ * target command
+ */
+struct fcpio_txrdy {
+ u16 rx_id; /* FC rx_id of target command */
+ u16 _resvd0; /* reserved */
+ u32 rel_offset; /* data sequence relative offset */
+ u32 sgl_cnt; /* scatter-gather list count */
+ u32 data_len; /* length of data expected to send */
+ u64 sgl_addr; /* scatter-gather list address */
+};
+
+/*
+ * fcpio_trsp: host -> firmware request
+ *
+ * used for requesting the firmware to send out a response for a target
+ * command
+ */
+struct fcpio_trsp {
+ u16 rx_id; /* FC rx_id of target command */
+ u16 _resvd0; /* reserved */
+ u32 sense_len; /* sense data buffer length */
+ u64 sense_addr; /* sense data buffer address */
+ u16 _resvd1; /* reserved */
+ u8 flags; /* response request flags */
+ u8 scsi_status; /* SCSI status */
+ u32 residual; /* SCSI data residual value of I/O */
+};
+
+/*
+ * resposnse request flags
+ */
+#define FCPIO_TRSP_RESID_UNDER 0x08 /* residual is valid and is underflow */
+#define FCPIO_TRSP_RESID_OVER 0x04 /* residual is valid and is overflow */
+
+/*
+ * fcpio_ttmf_ack: host -> firmware response
+ *
+ * used by the host to indicate to the firmware it has received and processed
+ * the target tmf request
+ */
+struct fcpio_ttmf_ack {
+ u16 rx_id; /* FC rx_id of target command */
+ u16 _resvd0; /* reserved */
+ u32 tmf_status; /* SCSI task management status */
+};
+
+/*
+ * fcpio_tabort: host -> firmware request
+ *
+ * used by the host to request the firmware to abort a target request that was
+ * received by the firmware
+ */
+struct fcpio_tabort {
+ u16 rx_id; /* rx_id of the target request */
+};
+
+/*
+ * fcpio_reset: host -> firmware request
+ *
+ * used by the host to signal a reset of the driver to the firmware
+ * and to request firmware to clean up all outstanding I/O
+ */
+struct fcpio_reset {
+ u32 _resvd;
+};
+
+enum fcpio_flogi_reg_format_type {
+ FCPIO_FLOGI_REG_DEF_DEST = 0, /* Use the oui | s_id mac format */
+ FCPIO_FLOGI_REG_GW_DEST, /* Use the fixed gateway mac */
+};
+
+/*
+ * fcpio_flogi_reg: host -> firmware request
+ *
+ * fc vnic only
+ * used by the host to notify the firmware of the lif's s_id
+ * and destination mac address format
+ */
+struct fcpio_flogi_reg {
+ u8 format;
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+ u8 gateway_mac[ETH_ALEN]; /* Destination gateway mac */
+ u16 _resvd;
+ u32 r_a_tov; /* R_A_TOV in msec */
+ u32 e_d_tov; /* E_D_TOV in msec */
+};
+
+/*
+ * fcpio_echo: host -> firmware request
+ *
+ * sends a heartbeat echo request to the firmware
+ */
+struct fcpio_echo {
+ u32 _resvd;
+};
+
+/*
+ * fcpio_lunmap_req: host -> firmware request
+ *
+ * scsi vnic only
+ * sends a request to retrieve the lunmap table for scsi vnics
+ */
+struct fcpio_lunmap_req {
+ u64 addr; /* address of the buffer */
+ u32 len; /* len of the buffer */
+};
+
+/*
+ * fcpio_flogi_fip_reg: host -> firmware request
+ *
+ * fc vnic only
+ * used by the host to notify the firmware of the lif's s_id
+ * and destination mac address format
+ */
+struct fcpio_flogi_fip_reg {
+ u8 _resvd0;
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+ u8 fcf_mac[ETH_ALEN]; /* FCF Target destination mac */
+ u16 _resvd1;
+ u32 r_a_tov; /* R_A_TOV in msec */
+ u32 e_d_tov; /* E_D_TOV in msec */
+ u8 ha_mac[ETH_ALEN]; /* Host adapter source mac */
+ u16 _resvd2;
+};
+
+/*
+ * Basic structure for all fcpio structures that are sent from the host to the
+ * firmware. They are 128 bytes per structure.
+ */
+#define FCPIO_HOST_REQ_LEN 128 /* expected length of host requests */
+
+struct fcpio_host_req {
+ struct fcpio_header hdr;
+
+ union {
+ /*
+ * Defines space needed for request
+ */
+ u8 buf[FCPIO_HOST_REQ_LEN - sizeof(struct fcpio_header)];
+
+ /*
+ * Initiator host requests
+ */
+ struct fcpio_icmnd_16 icmnd_16;
+ struct fcpio_icmnd_32 icmnd_32;
+ struct fcpio_itmf itmf;
+
+ /*
+ * Target host requests
+ */
+ struct fcpio_tdata tdata;
+ struct fcpio_txrdy txrdy;
+ struct fcpio_trsp trsp;
+ struct fcpio_ttmf_ack ttmf_ack;
+ struct fcpio_tabort tabort;
+
+ /*
+ * Misc requests
+ */
+ struct fcpio_reset reset;
+ struct fcpio_flogi_reg flogi_reg;
+ struct fcpio_echo echo;
+ struct fcpio_lunmap_req lunmap_req;
+ struct fcpio_flogi_fip_reg flogi_fip_reg;
+ } u;
+};
+
+/*
+ * fcpio_icmnd_cmpl: firmware -> host response
+ *
+ * used for sending the host a response to an initiator command
+ */
+struct fcpio_icmnd_cmpl {
+ u8 _resvd0[6]; /* reserved */
+ u8 flags; /* response flags */
+ u8 scsi_status; /* SCSI status */
+ u32 residual; /* SCSI data residual length */
+ u32 sense_len; /* SCSI sense length */
+};
+
+/*
+ * response flags
+ */
+#define FCPIO_ICMND_CMPL_RESID_UNDER 0x08 /* resid under and valid */
+#define FCPIO_ICMND_CMPL_RESID_OVER 0x04 /* resid over and valid */
+
+/*
+ * fcpio_itmf_cmpl: firmware -> host response
+ *
+ * used for sending the host a response for a itmf request
+ */
+struct fcpio_itmf_cmpl {
+ u32 _resvd; /* reserved */
+};
+
+/*
+ * fcpio_tcmnd_16: firmware -> host request
+ *
+ * used by the firmware to notify the host of an incoming target SCSI 16-Byte
+ * request
+ */
+struct fcpio_tcmnd_16 {
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 pri_ta; /* SCSI Priority and Task attribute */
+ u8 _resvd2; /* reserved: should be 0 */
+ u8 flags; /* command flags */
+ u8 scsi_cdb[CDB_16]; /* SCSI Cmnd Descriptor Block */
+ u32 data_len; /* length of data expected */
+ u8 _resvd1; /* reserved */
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+};
+
+/*
+ * Priority/Task Attribute settings
+ */
+#define FCPIO_TCMND_PTA_SIMPLE 0 /* simple task attribute */
+#define FCPIO_TCMND_PTA_HEADQ 1 /* head of queue task attribute */
+#define FCPIO_TCMND_PTA_ORDERED 2 /* ordered task attribute */
+#define FCPIO_TCMND_PTA_ACA 4 /* auto contingent allegiance */
+#define FCPIO_TCMND_PRI_SHIFT 3 /* priority field starts in bit 3 */
+
+/*
+ * Command flags
+ */
+#define FCPIO_TCMND_RDDATA 0x02 /* read data */
+#define FCPIO_TCMND_WRDATA 0x01 /* write data */
+
+/*
+ * fcpio_tcmnd_32: firmware -> host request
+ *
+ * used by the firmware to notify the host of an incoming target SCSI 32-Byte
+ * request
+ */
+struct fcpio_tcmnd_32 {
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 pri_ta; /* SCSI Priority and Task attribute */
+ u8 _resvd2; /* reserved: should be 0 */
+ u8 flags; /* command flags */
+ u8 scsi_cdb[CDB_32]; /* SCSI Cmnd Descriptor Block */
+ u32 data_len; /* length of data expected */
+ u8 _resvd0; /* reserved */
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+};
+
+/*
+ * fcpio_tdrsp_cmpl: firmware -> host response
+ *
+ * used by the firmware to notify the host of a response to a host target
+ * command
+ */
+struct fcpio_tdrsp_cmpl {
+ u16 rx_id; /* rx_id of the target request */
+ u16 _resvd0; /* reserved */
+};
+
+/*
+ * fcpio_ttmf: firmware -> host request
+ *
+ * used by the firmware to notify the host of an incoming task management
+ * function request
+ */
+struct fcpio_ttmf {
+ u8 _resvd0; /* reserved */
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 _resvd2[3]; /* reserved */
+ u32 tmf_type; /* task management request type */
+};
+
+/*
+ * Task Management request
+ */
+#define FCPIO_TTMF_CLR_ACA 0x40 /* Clear ACA condition */
+#define FCPIO_TTMF_LUN_RESET 0x10 /* logical unit reset task mgmt */
+#define FCPIO_TTMF_CLR_TASK_SET 0x04 /* clear task set */
+#define FCPIO_TTMF_ABT_TASK_SET 0x02 /* abort task set */
+#define FCPIO_TTMF_ABT_TASK 0x01 /* abort task */
+
+/*
+ * fcpio_tabort_cmpl: firmware -> host response
+ *
+ * used by the firmware to respond to a host's tabort request
+ */
+struct fcpio_tabort_cmpl {
+ u16 rx_id; /* rx_id of the target request */
+ u16 _resvd0; /* reserved */
+};
+
+/*
+ * fcpio_ack: firmware -> host response
+ *
+ * used by firmware to notify the host of the last work request received
+ */
+struct fcpio_ack {
+ u16 request_out; /* last host entry received */
+ u16 _resvd;
+};
+
+/*
+ * fcpio_reset_cmpl: firmware -> host response
+ *
+ * use by firmware to respond to the host's reset request
+ */
+struct fcpio_reset_cmpl {
+ u16 vnic_id;
+};
+
+/*
+ * fcpio_flogi_reg_cmpl: firmware -> host response
+ *
+ * fc vnic only
+ * response to the fcpio_flogi_reg request
+ */
+struct fcpio_flogi_reg_cmpl {
+ u32 _resvd;
+};
+
+/*
+ * fcpio_echo_cmpl: firmware -> host response
+ *
+ * response to the fcpio_echo request
+ */
+struct fcpio_echo_cmpl {
+ u32 _resvd;
+};
+
+/*
+ * fcpio_lunmap_chng: firmware -> host notification
+ *
+ * scsi vnic only
+ * notifies the host that the lunmap tables have changed
+ */
+struct fcpio_lunmap_chng {
+ u32 _resvd;
+};
+
+/*
+ * fcpio_lunmap_req_cmpl: firmware -> host response
+ *
+ * scsi vnic only
+ * response for lunmap table request from the host
+ */
+struct fcpio_lunmap_req_cmpl {
+ u32 _resvd;
+};
+
+/*
+ * Basic structure for all fcpio structures that are sent from the firmware to
+ * the host. They are 64 bytes per structure.
+ */
+#define FCPIO_FW_REQ_LEN 64 /* expected length of fw requests */
+struct fcpio_fw_req {
+ struct fcpio_header hdr;
+
+ union {
+ /*
+ * Defines space needed for request
+ */
+ u8 buf[FCPIO_FW_REQ_LEN - sizeof(struct fcpio_header)];
+
+ /*
+ * Initiator firmware responses
+ */
+ struct fcpio_icmnd_cmpl icmnd_cmpl;
+ struct fcpio_itmf_cmpl itmf_cmpl;
+
+ /*
+ * Target firmware new requests
+ */
+ struct fcpio_tcmnd_16 tcmnd_16;
+ struct fcpio_tcmnd_32 tcmnd_32;
+
+ /*
+ * Target firmware responses
+ */
+ struct fcpio_tdrsp_cmpl tdrsp_cmpl;
+ struct fcpio_ttmf ttmf;
+ struct fcpio_tabort_cmpl tabort_cmpl;
+
+ /*
+ * Firmware response to work received
+ */
+ struct fcpio_ack ack;
+
+ /*
+ * Misc requests
+ */
+ struct fcpio_reset_cmpl reset_cmpl;
+ struct fcpio_flogi_reg_cmpl flogi_reg_cmpl;
+ struct fcpio_echo_cmpl echo_cmpl;
+ struct fcpio_lunmap_chng lunmap_chng;
+ struct fcpio_lunmap_req_cmpl lunmap_req_cmpl;
+ } u;
+};
+
+/*
+ * Access routines to encode and decode the color bit, which is the most
+ * significant bit of the MSB of the structure
+ */
+static inline void fcpio_color_enc(struct fcpio_fw_req *fw_req, u8 color)
+{
+ u8 *c = ((u8 *) fw_req) + sizeof(struct fcpio_fw_req) - 1;
+
+ if (color)
+ *c |= 0x80;
+ else
+ *c &= ~0x80;
+}
+
+static inline void fcpio_color_dec(struct fcpio_fw_req *fw_req, u8 *color)
+{
+ u8 *c = ((u8 *) fw_req) + sizeof(struct fcpio_fw_req) - 1;
+
+ *color = *c >> 7;
+
+ /*
+ * Make sure color bit is read from desc *before* other fields
+ * are read from desc. Hardware guarantees color bit is last
+ * bit (byte) written. Adding the rmb() prevents the compiler
+ * and/or CPU from reordering the reads which would potentially
+ * result in reading stale values.
+ */
+
+ rmb();
+
+}
+
+/*
+ * Lunmap table entry for scsi vnics
+ */
+#define FCPIO_LUNMAP_TABLE_SIZE 256
+#define FCPIO_FLAGS_LUNMAP_VALID 0x80
+#define FCPIO_FLAGS_BOOT 0x01
+struct fcpio_lunmap_entry {
+ u8 bus;
+ u8 target;
+ u8 lun;
+ u8 path_cnt;
+ u16 flags;
+ u16 update_cnt;
+};
+
+struct fcpio_lunmap_tbl {
+ u32 update_cnt;
+ struct fcpio_lunmap_entry lunmaps[FCPIO_LUNMAP_TABLE_SIZE];
+};
+
+#endif /* _FCPIO_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FNIC_H_
+#define _FNIC_H_
+
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/workqueue.h>
+#include <scsi/libfc.h>
+#include "fnic_io.h"
+#include "fnic_res.h"
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "vnic_cq.h"
+#include "vnic_wq_copy.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "vnic_scsi.h"
+
+#define DRV_NAME "fnic"
+#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
+#define DRV_VERSION "1.0.0.1121"
+#define PFX DRV_NAME ": "
+#define DFX DRV_NAME "%d: "
+
+#define DESC_CLEAN_LOW_WATERMARK 8
+#define FNIC_MAX_IO_REQ 2048 /* scsi_cmnd tag map entries */
+#define FNIC_IO_LOCKS 64 /* IO locks: power of 2 */
+#define FNIC_DFLT_QUEUE_DEPTH 32
+#define FNIC_STATS_RATE_LIMIT 4 /* limit rate at which stats are pulled up */
+
+/*
+ * Tag bits used for special requests.
+ */
+#define BIT(nr) (1UL << (nr))
+#define FNIC_TAG_ABORT BIT(30) /* tag bit indicating abort */
+#define FNIC_TAG_DEV_RST BIT(29) /* indicates device reset */
+#define FNIC_TAG_MASK (BIT(24) - 1) /* mask for lookup */
+#define FNIC_NO_TAG -1
+
+/*
+ * Usage of the scsi_cmnd scratchpad.
+ * These fields are locked by the hashed io_req_lock.
+ */
+#define CMD_SP(Cmnd) ((Cmnd)->SCp.ptr)
+#define CMD_STATE(Cmnd) ((Cmnd)->SCp.phase)
+#define CMD_ABTS_STATUS(Cmnd) ((Cmnd)->SCp.Message)
+#define CMD_LR_STATUS(Cmnd) ((Cmnd)->SCp.have_data_in)
+#define CMD_TAG(Cmnd) ((Cmnd)->SCp.sent_command)
+
+#define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
+
+#define FNIC_LUN_RESET_TIMEOUT 10000 /* mSec */
+#define FNIC_HOST_RESET_TIMEOUT 10000 /* mSec */
+#define FNIC_RMDEVICE_TIMEOUT 1000 /* mSec */
+#define FNIC_HOST_RESET_SETTLE_TIME 30 /* Sec */
+
+#define FNIC_MAX_FCP_TARGET 256
+
+extern unsigned int fnic_log_level;
+
+#define FNIC_MAIN_LOGGING 0x01
+#define FNIC_FCS_LOGGING 0x02
+#define FNIC_SCSI_LOGGING 0x04
+#define FNIC_ISR_LOGGING 0x08
+
+#define FNIC_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(fnic_log_level & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0)
+
+#define FNIC_MAIN_DBG(kern_level, host, fmt, args...) \
+ FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING, \
+ shost_printk(kern_level, host, fmt, ##args);)
+
+#define FNIC_FCS_DBG(kern_level, host, fmt, args...) \
+ FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING, \
+ shost_printk(kern_level, host, fmt, ##args);)
+
+#define FNIC_SCSI_DBG(kern_level, host, fmt, args...) \
+ FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING, \
+ shost_printk(kern_level, host, fmt, ##args);)
+
+#define FNIC_ISR_DBG(kern_level, host, fmt, args...) \
+ FNIC_CHECK_LOGGING(FNIC_ISR_LOGGING, \
+ shost_printk(kern_level, host, fmt, ##args);)
+
+extern const char *fnic_state_str[];
+
+enum fnic_intx_intr_index {
+ FNIC_INTX_WQ_RQ_COPYWQ,
+ FNIC_INTX_ERR,
+ FNIC_INTX_NOTIFY,
+ FNIC_INTX_INTR_MAX,
+};
+
+enum fnic_msix_intr_index {
+ FNIC_MSIX_RQ,
+ FNIC_MSIX_WQ,
+ FNIC_MSIX_WQ_COPY,
+ FNIC_MSIX_ERR_NOTIFY,
+ FNIC_MSIX_INTR_MAX,
+};
+
+struct fnic_msix_entry {
+ int requested;
+ char devname[IFNAMSIZ];
+ irqreturn_t (*isr)(int, void *);
+ void *devid;
+};
+
+enum fnic_state {
+ FNIC_IN_FC_MODE = 0,
+ FNIC_IN_FC_TRANS_ETH_MODE,
+ FNIC_IN_ETH_MODE,
+ FNIC_IN_ETH_TRANS_FC_MODE,
+};
+
+#define FNIC_WQ_COPY_MAX 1
+#define FNIC_WQ_MAX 1
+#define FNIC_RQ_MAX 1
+#define FNIC_CQ_MAX (FNIC_WQ_COPY_MAX + FNIC_WQ_MAX + FNIC_RQ_MAX)
+
+struct mempool;
+
+/* Per-instance private data structure */
+struct fnic {
+ struct fc_lport *lport;
+ struct vnic_dev_bar bar0;
+
+ struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
+ struct fnic_msix_entry msix[FNIC_MSIX_INTR_MAX];
+
+ struct vnic_stats *stats;
+ unsigned long stats_time; /* time of stats update */
+ struct vnic_nic_cfg *nic_cfg;
+ char name[IFNAMSIZ];
+ struct timer_list notify_timer; /* used for MSI interrupts */
+
+ unsigned int err_intr_offset;
+ unsigned int link_intr_offset;
+
+ unsigned int wq_count;
+ unsigned int cq_count;
+
+ u32 fcoui_mode:1; /* use fcoui address*/
+ u32 vlan_hw_insert:1; /* let hw insert the tag */
+ u32 in_remove:1; /* fnic device in removal */
+ u32 stop_rx_link_events:1; /* stop proc. rx frames, link events */
+
+ struct completion *remove_wait; /* device remove thread blocks */
+
+ struct fc_frame *flogi;
+ struct fc_frame *flogi_resp;
+ u16 flogi_oxid;
+ unsigned long s_id;
+ enum fnic_state state;
+ spinlock_t fnic_lock;
+
+ u16 vlan_id; /* VLAN tag including priority */
+ u8 mac_addr[ETH_ALEN];
+ u8 dest_addr[ETH_ALEN];
+ u8 data_src_addr[ETH_ALEN];
+ u64 fcp_input_bytes; /* internal statistic */
+ u64 fcp_output_bytes; /* internal statistic */
+ u32 link_down_cnt;
+ int link_status;
+
+ struct list_head list;
+ struct pci_dev *pdev;
+ struct vnic_fc_config config;
+ struct vnic_dev *vdev;
+ unsigned int raw_wq_count;
+ unsigned int wq_copy_count;
+ unsigned int rq_count;
+ int fw_ack_index[FNIC_WQ_COPY_MAX];
+ unsigned short fw_ack_recd[FNIC_WQ_COPY_MAX];
+ unsigned short wq_copy_desc_low[FNIC_WQ_COPY_MAX];
+ unsigned int intr_count;
+ u32 __iomem *legacy_pba;
+ struct fnic_host_tag *tags;
+ mempool_t *io_req_pool;
+ mempool_t *io_sgl_pool[FNIC_SGL_NUM_CACHES];
+ spinlock_t io_req_lock[FNIC_IO_LOCKS]; /* locks for scsi cmnds */
+
+ struct work_struct link_work;
+ struct work_struct frame_work;
+ struct sk_buff_head frame_queue;
+
+ /* copy work queue cache line section */
+ ____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
+ /* completion queue cache line section */
+ ____cacheline_aligned struct vnic_cq cq[FNIC_CQ_MAX];
+
+ spinlock_t wq_copy_lock[FNIC_WQ_COPY_MAX];
+
+ /* work queue cache line section */
+ ____cacheline_aligned struct vnic_wq wq[FNIC_WQ_MAX];
+ spinlock_t wq_lock[FNIC_WQ_MAX];
+
+ /* receive queue cache line section */
+ ____cacheline_aligned struct vnic_rq rq[FNIC_RQ_MAX];
+
+ /* interrupt resource cache line section */
+ ____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
+};
+
+extern struct workqueue_struct *fnic_event_queue;
+extern struct device_attribute *fnic_attrs[];
+
+void fnic_clear_intr_mode(struct fnic *fnic);
+int fnic_set_intr_mode(struct fnic *fnic);
+void fnic_free_intr(struct fnic *fnic);
+int fnic_request_intr(struct fnic *fnic);
+
+int fnic_send(struct fc_lport *, struct fc_frame *);
+void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf);
+void fnic_handle_frame(struct work_struct *work);
+void fnic_handle_link(struct work_struct *work);
+int fnic_rq_cmpl_handler(struct fnic *fnic, int);
+int fnic_alloc_rq_frame(struct vnic_rq *rq);
+void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
+int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp);
+
+int fnic_queuecommand(struct scsi_cmnd *, void (*done)(struct scsi_cmnd *));
+int fnic_abort_cmd(struct scsi_cmnd *);
+int fnic_device_reset(struct scsi_cmnd *);
+int fnic_host_reset(struct scsi_cmnd *);
+int fnic_reset(struct Scsi_Host *);
+void fnic_scsi_cleanup(struct fc_lport *);
+void fnic_scsi_abort_io(struct fc_lport *);
+void fnic_empty_scsi_cleanup(struct fc_lport *);
+void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
+int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
+int fnic_wq_cmpl_handler(struct fnic *fnic, int);
+int fnic_flogi_reg_handler(struct fnic *fnic);
+void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *desc);
+int fnic_fw_reset_handler(struct fnic *fnic);
+void fnic_terminate_rport_io(struct fc_rport *);
+const char *fnic_state_to_str(unsigned int state);
+
+void fnic_log_q_error(struct fnic *fnic);
+void fnic_handle_link_event(struct fnic *fnic);
+
+#endif /* _FNIC_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/string.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include "fnic.h"
+
+static ssize_t fnic_show_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fc_lport *lp = shost_priv(class_to_shost(dev));
+ struct fnic *fnic = lport_priv(lp);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", fnic_state_str[fnic->state]);
+}
+
+static ssize_t fnic_show_drv_version(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", DRV_VERSION);
+}
+
+static ssize_t fnic_show_link_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fc_lport *lp = shost_priv(class_to_shost(dev));
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", (lp->link_up)
+ ? "Link Up" : "Link Down");
+}
+
+static DEVICE_ATTR(fnic_state, S_IRUGO, fnic_show_state, NULL);
+static DEVICE_ATTR(drv_version, S_IRUGO, fnic_show_drv_version, NULL);
+static DEVICE_ATTR(link_state, S_IRUGO, fnic_show_link_state, NULL);
+
+struct device_attribute *fnic_attrs[] = {
+ &dev_attr_fnic_state,
+ &dev_attr_drv_version,
+ &dev_attr_link_state,
+ NULL,
+};
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/workqueue.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fcoe.h>
+#include <scsi/fc_frame.h>
+#include <scsi/libfc.h>
+#include "fnic_io.h"
+#include "fnic.h"
+#include "cq_enet_desc.h"
+#include "cq_exch_desc.h"
+
+struct workqueue_struct *fnic_event_queue;
+
+void fnic_handle_link(struct work_struct *work)
+{
+ struct fnic *fnic = container_of(work, struct fnic, link_work);
+ unsigned long flags;
+ int old_link_status;
+ u32 old_link_down_cnt;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+
+ old_link_down_cnt = fnic->link_down_cnt;
+ old_link_status = fnic->link_status;
+ fnic->link_status = vnic_dev_link_status(fnic->vdev);
+ fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
+
+ if (old_link_status == fnic->link_status) {
+ if (!fnic->link_status)
+ /* DOWN -> DOWN */
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ else {
+ if (old_link_down_cnt != fnic->link_down_cnt) {
+ /* UP -> DOWN -> UP */
+ fnic->lport->host_stats.link_failure_count++;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "link down\n");
+ fc_linkdown(fnic->lport);
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "link up\n");
+ fc_linkup(fnic->lport);
+ } else
+ /* UP -> UP */
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ }
+ } else if (fnic->link_status) {
+ /* DOWN -> UP */
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
+ fc_linkup(fnic->lport);
+ } else {
+ /* UP -> DOWN */
+ fnic->lport->host_stats.link_failure_count++;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
+ fc_linkdown(fnic->lport);
+ }
+
+}
+
+/*
+ * This function passes incoming fabric frames to libFC
+ */
+void fnic_handle_frame(struct work_struct *work)
+{
+ struct fnic *fnic = container_of(work, struct fnic, frame_work);
+ struct fc_lport *lp = fnic->lport;
+ unsigned long flags;
+ struct sk_buff *skb;
+ struct fc_frame *fp;
+
+ while ((skb = skb_dequeue(&fnic->frame_queue))) {
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb(skb);
+ return;
+ }
+ fp = (struct fc_frame *)skb;
+ /* if Flogi resp frame, register the address */
+ if (fr_flags(fp)) {
+ vnic_dev_add_addr(fnic->vdev,
+ fnic->data_src_addr);
+ fr_flags(fp) = 0;
+ }
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ fc_exch_recv(lp, lp->emp, fp);
+ }
+
+}
+
+static inline void fnic_import_rq_fc_frame(struct sk_buff *skb,
+ u32 len, u8 sof, u8 eof)
+{
+ struct fc_frame *fp = (struct fc_frame *)skb;
+
+ skb_trim(skb, len);
+ fr_eof(fp) = eof;
+ fr_sof(fp) = sof;
+}
+
+
+static inline int fnic_import_rq_eth_pkt(struct sk_buff *skb, u32 len)
+{
+ struct fc_frame *fp;
+ struct ethhdr *eh;
+ struct vlan_ethhdr *vh;
+ struct fcoe_hdr *fcoe_hdr;
+ struct fcoe_crc_eof *ft;
+ u32 transport_len = 0;
+
+ eh = (struct ethhdr *)skb->data;
+ vh = (struct vlan_ethhdr *)skb->data;
+ if (vh->h_vlan_proto == htons(ETH_P_8021Q) &&
+ vh->h_vlan_encapsulated_proto == htons(ETH_P_FCOE)) {
+ skb_pull(skb, sizeof(struct vlan_ethhdr));
+ transport_len += sizeof(struct vlan_ethhdr);
+ } else if (eh->h_proto == htons(ETH_P_FCOE)) {
+ transport_len += sizeof(struct ethhdr);
+ skb_pull(skb, sizeof(struct ethhdr));
+ } else
+ return -1;
+
+ fcoe_hdr = (struct fcoe_hdr *)skb->data;
+ if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
+ return -1;
+
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_sof(fp) = fcoe_hdr->fcoe_sof;
+ skb_pull(skb, sizeof(struct fcoe_hdr));
+ transport_len += sizeof(struct fcoe_hdr);
+
+ ft = (struct fcoe_crc_eof *)(skb->data + len -
+ transport_len - sizeof(*ft));
+ fr_eof(fp) = ft->fcoe_eof;
+ skb_trim(skb, len - transport_len - sizeof(*ft));
+ return 0;
+}
+
+static inline int fnic_handle_flogi_resp(struct fnic *fnic,
+ struct fc_frame *fp)
+{
+ u8 mac[ETH_ALEN] = FC_FCOE_FLOGI_MAC;
+ struct ethhdr *eth_hdr;
+ struct fc_frame_header *fh;
+ int ret = 0;
+ unsigned long flags;
+ struct fc_frame *old_flogi_resp = NULL;
+
+ fh = (struct fc_frame_header *)fr_hdr(fp);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ if (fnic->state == FNIC_IN_ETH_MODE) {
+
+ /*
+ * Check if oxid matches on taking the lock. A new Flogi
+ * issued by libFC might have changed the fnic cached oxid
+ */
+ if (fnic->flogi_oxid != ntohs(fh->fh_ox_id)) {
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "Flogi response oxid not"
+ " matching cached oxid, dropping frame"
+ "\n");
+ ret = -1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb_irq(fp_skb(fp));
+ goto handle_flogi_resp_end;
+ }
+
+ /* Drop older cached flogi response frame, cache this frame */
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = fp;
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+
+ /*
+ * this frame is part of flogi get the src mac addr from this
+ * frame if the src mac is fcoui based then we mark the
+ * address mode flag to use fcoui base for dst mac addr
+ * otherwise we have to store the fcoe gateway addr
+ */
+ eth_hdr = (struct ethhdr *)skb_mac_header(fp_skb(fp));
+ memcpy(mac, eth_hdr->h_source, ETH_ALEN);
+
+ if (ntoh24(mac) == FC_FCOE_OUI)
+ fnic->fcoui_mode = 1;
+ else {
+ fnic->fcoui_mode = 0;
+ memcpy(fnic->dest_addr, mac, ETH_ALEN);
+ }
+
+ /*
+ * Except for Flogi frame, all outbound frames from us have the
+ * Eth Src address as FC_FCOE_OUI"our_sid". Flogi frame uses
+ * the vnic MAC address as the Eth Src address
+ */
+ fc_fcoe_set_mac(fnic->data_src_addr, fh->fh_d_id);
+
+ /* We get our s_id from the d_id of the flogi resp frame */
+ fnic->s_id = ntoh24(fh->fh_d_id);
+
+ /* Change state to reflect transition from Eth to FC mode */
+ fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
+
+ } else {
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "Unexpected fnic state %s while"
+ " processing flogi resp\n",
+ fnic_state_to_str(fnic->state));
+ ret = -1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb_irq(fp_skb(fp));
+ goto handle_flogi_resp_end;
+ }
+
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ /* Drop older cached frame */
+ if (old_flogi_resp)
+ dev_kfree_skb_irq(fp_skb(old_flogi_resp));
+
+ /*
+ * send flogi reg request to firmware, this will put the fnic in
+ * in FC mode
+ */
+ ret = fnic_flogi_reg_handler(fnic);
+
+ if (ret < 0) {
+ int free_fp = 1;
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ /*
+ * free the frame is some other thread is not
+ * pointing to it
+ */
+ if (fnic->flogi_resp != fp)
+ free_fp = 0;
+ else
+ fnic->flogi_resp = NULL;
+
+ if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
+ fnic->state = FNIC_IN_ETH_MODE;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ if (free_fp)
+ dev_kfree_skb_irq(fp_skb(fp));
+ }
+
+ handle_flogi_resp_end:
+ return ret;
+}
+
+/* Returns 1 for a response that matches cached flogi oxid */
+static inline int is_matching_flogi_resp_frame(struct fnic *fnic,
+ struct fc_frame *fp)
+{
+ struct fc_frame_header *fh;
+ int ret = 0;
+ u32 f_ctl;
+
+ fh = fc_frame_header_get(fp);
+ f_ctl = ntoh24(fh->fh_f_ctl);
+
+ if (fnic->flogi_oxid == ntohs(fh->fh_ox_id) &&
+ fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+ (f_ctl & (FC_FC_EX_CTX | FC_FC_SEQ_CTX)) == FC_FC_EX_CTX &&
+ fh->fh_type == FC_TYPE_ELS)
+ ret = 1;
+
+ return ret;
+}
+
+static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
+ *cq_desc, struct vnic_rq_buf *buf,
+ int skipped __attribute__((unused)),
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+ struct sk_buff *skb;
+ struct fc_frame *fp;
+ unsigned int eth_hdrs_stripped;
+ u8 type, color, eop, sop, ingress_port, vlan_stripped;
+ u8 fcoe = 0, fcoe_sof, fcoe_eof;
+ u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
+ u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
+ u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
+ u8 fcs_ok = 1, packet_error = 0;
+ u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
+ u32 rss_hash;
+ u16 exchange_id, tmpl;
+ u8 sof = 0;
+ u8 eof = 0;
+ u32 fcp_bytes_written = 0;
+ unsigned long flags;
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
+ PCI_DMA_FROMDEVICE);
+ skb = buf->os_buf;
+ buf->os_buf = NULL;
+
+ cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
+ if (type == CQ_DESC_TYPE_RQ_FCP) {
+ cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
+ &type, &color, &q_number, &completed_index,
+ &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
+ &tmpl, &fcp_bytes_written, &sof, &eof,
+ &ingress_port, &packet_error,
+ &fcoe_enc_error, &fcs_ok, &vlan_stripped,
+ &vlan);
+ eth_hdrs_stripped = 1;
+
+ } else if (type == CQ_DESC_TYPE_RQ_ENET) {
+ cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
+ &type, &color, &q_number, &completed_index,
+ &ingress_port, &fcoe, &eop, &sop,
+ &rss_type, &csum_not_calc, &rss_hash,
+ &bytes_written, &packet_error,
+ &vlan_stripped, &vlan, &checksum,
+ &fcoe_sof, &fcoe_fc_crc_ok,
+ &fcoe_enc_error, &fcoe_eof,
+ &tcp_udp_csum_ok, &udp, &tcp,
+ &ipv4_csum_ok, &ipv6, &ipv4,
+ &ipv4_fragment, &fcs_ok);
+ eth_hdrs_stripped = 0;
+
+ } else {
+ /* wrong CQ type*/
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "fnic rq_cmpl wrong cq type x%x\n", type);
+ goto drop;
+ }
+
+ if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic rq_cmpl fcoe x%x fcsok x%x"
+ " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
+ " x%x\n",
+ fcoe, fcs_ok, packet_error,
+ fcoe_fc_crc_ok, fcoe_enc_error);
+ goto drop;
+ }
+
+ if (eth_hdrs_stripped)
+ fnic_import_rq_fc_frame(skb, fcp_bytes_written, sof, eof);
+ else if (fnic_import_rq_eth_pkt(skb, bytes_written))
+ goto drop;
+
+ fp = (struct fc_frame *)skb;
+
+ /*
+ * If frame is an ELS response that matches the cached FLOGI OX_ID,
+ * and is accept, issue flogi_reg_request copy wq request to firmware
+ * to register the S_ID and determine whether FC_OUI mode or GW mode.
+ */
+ if (is_matching_flogi_resp_frame(fnic, fp)) {
+ if (!eth_hdrs_stripped) {
+ if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
+ fnic_handle_flogi_resp(fnic, fp);
+ return;
+ }
+ /*
+ * Recd. Flogi reject. No point registering
+ * with fw, but forward to libFC
+ */
+ goto forward;
+ }
+ goto drop;
+ }
+ if (!eth_hdrs_stripped)
+ goto drop;
+
+forward:
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ goto drop;
+ }
+ /* Use fr_flags to indicate whether succ. flogi resp or not */
+ fr_flags(fp) = 0;
+ fr_dev(fp) = fnic->lport;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ skb_queue_tail(&fnic->frame_queue, skb);
+ queue_work(fnic_event_queue, &fnic->frame_work);
+
+ return;
+drop:
+ dev_kfree_skb_irq(skb);
+}
+
+static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
+ struct cq_desc *cq_desc, u8 type,
+ u16 q_number, u16 completed_index,
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(vdev);
+
+ vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
+ VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
+ NULL);
+ return 0;
+}
+
+int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
+{
+ unsigned int tot_rq_work_done = 0, cur_work_done;
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
+ fnic_rq_cmpl_handler_cont,
+ NULL);
+ if (cur_work_done) {
+ err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
+ if (err)
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "fnic_alloc_rq_frame cant alloc"
+ " frame\n");
+ }
+ tot_rq_work_done += cur_work_done;
+ }
+
+ return tot_rq_work_done;
+}
+
+/*
+ * This function is called once at init time to allocate and fill RQ
+ * buffers. Subsequently, it is called in the interrupt context after RQ
+ * buffer processing to replenish the buffers in the RQ
+ */
+int fnic_alloc_rq_frame(struct vnic_rq *rq)
+{
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+ struct sk_buff *skb;
+ u16 len;
+ dma_addr_t pa;
+
+ len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
+ skb = dev_alloc_skb(len);
+ if (!skb) {
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "Unable to allocate RQ sk_buff\n");
+ return -ENOMEM;
+ }
+ skb_reset_mac_header(skb);
+ skb_reset_transport_header(skb);
+ skb_reset_network_header(skb);
+ skb_put(skb, len);
+ pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
+ fnic_queue_rq_desc(rq, skb, pa, len);
+ return 0;
+}
+
+void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
+{
+ struct fc_frame *fp = buf->os_buf;
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
+ PCI_DMA_FROMDEVICE);
+
+ dev_kfree_skb(fp_skb(fp));
+ buf->os_buf = NULL;
+}
+
+static inline int is_flogi_frame(struct fc_frame_header *fh)
+{
+ return fh->fh_r_ctl == FC_RCTL_ELS_REQ && *(u8 *)(fh + 1) == ELS_FLOGI;
+}
+
+int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
+{
+ struct vnic_wq *wq = &fnic->wq[0];
+ struct sk_buff *skb;
+ dma_addr_t pa;
+ struct ethhdr *eth_hdr;
+ struct vlan_ethhdr *vlan_hdr;
+ struct fcoe_hdr *fcoe_hdr;
+ struct fc_frame_header *fh;
+ u32 tot_len, eth_hdr_len;
+ int ret = 0;
+ unsigned long flags;
+
+ fh = fc_frame_header_get(fp);
+ skb = fp_skb(fp);
+
+ if (!fnic->vlan_hw_insert) {
+ eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
+ vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
+ eth_hdr = (struct ethhdr *)vlan_hdr;
+ vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
+ vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
+ vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
+ fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
+ } else {
+ eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
+ eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
+ eth_hdr->h_proto = htons(ETH_P_FCOE);
+ fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
+ }
+
+ if (is_flogi_frame(fh)) {
+ fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
+ memcpy(eth_hdr->h_source, fnic->mac_addr, ETH_ALEN);
+ } else {
+ if (fnic->fcoui_mode)
+ fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
+ else
+ memcpy(eth_hdr->h_dest, fnic->dest_addr, ETH_ALEN);
+ memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
+ }
+
+ tot_len = skb->len;
+ BUG_ON(tot_len % 4);
+
+ memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
+ fcoe_hdr->fcoe_sof = fr_sof(fp);
+ if (FC_FCOE_VER)
+ FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
+
+ pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
+
+ spin_lock_irqsave(&fnic->wq_lock[0], flags);
+
+ if (!vnic_wq_desc_avail(wq)) {
+ pci_unmap_single(fnic->pdev, pa,
+ tot_len, PCI_DMA_TODEVICE);
+ ret = -1;
+ goto fnic_send_frame_end;
+ }
+
+ fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
+ fnic->vlan_hw_insert, fnic->vlan_id, 1, 1, 1);
+fnic_send_frame_end:
+ spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
+
+ if (ret)
+ dev_kfree_skb_any(fp_skb(fp));
+
+ return ret;
+}
+
+/*
+ * fnic_send
+ * Routine to send a raw frame
+ */
+int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
+{
+ struct fnic *fnic = lport_priv(lp);
+ struct fc_frame_header *fh;
+ int ret = 0;
+ enum fnic_state old_state;
+ unsigned long flags;
+ struct fc_frame *old_flogi = NULL;
+ struct fc_frame *old_flogi_resp = NULL;
+
+ if (fnic->in_remove) {
+ dev_kfree_skb(fp_skb(fp));
+ ret = -1;
+ goto fnic_send_end;
+ }
+
+ fh = fc_frame_header_get(fp);
+ /* if not an Flogi frame, send it out, this is the common case */
+ if (!is_flogi_frame(fh))
+ return fnic_send_frame(fnic, fp);
+
+ /* Flogi frame, now enter the state machine */
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+again:
+ /* Get any old cached frames, free them after dropping lock */
+ old_flogi = fnic->flogi;
+ fnic->flogi = NULL;
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+
+ old_state = fnic->state;
+ switch (old_state) {
+ case FNIC_IN_FC_MODE:
+ case FNIC_IN_ETH_TRANS_FC_MODE:
+ default:
+ fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+ vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (old_flogi) {
+ dev_kfree_skb(fp_skb(old_flogi));
+ old_flogi = NULL;
+ }
+ if (old_flogi_resp) {
+ dev_kfree_skb(fp_skb(old_flogi_resp));
+ old_flogi_resp = NULL;
+ }
+
+ ret = fnic_fw_reset_handler(fnic);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
+ goto again;
+ if (ret) {
+ fnic->state = old_state;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb(fp_skb(fp));
+ goto fnic_send_end;
+ }
+ old_flogi = fnic->flogi;
+ fnic->flogi = fp;
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ break;
+
+ case FNIC_IN_FC_TRANS_ETH_MODE:
+ /*
+ * A reset is pending with the firmware. Store the flogi
+ * and its oxid. The transition out of this state happens
+ * only when Firmware completes the reset, either with
+ * success or failed. If success, transition to
+ * FNIC_IN_ETH_MODE, if fail, then transition to
+ * FNIC_IN_FC_MODE
+ */
+ fnic->flogi = fp;
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ break;
+
+ case FNIC_IN_ETH_MODE:
+ /*
+ * The fw/hw is already in eth mode. Store the oxid,
+ * and send the flogi frame out. The transition out of this
+ * state happens only we receive flogi response from the
+ * network, and the oxid matches the cached oxid when the
+ * flogi frame was sent out. If they match, then we issue
+ * a flogi_reg request and transition to state
+ * FNIC_IN_ETH_TRANS_FC_MODE
+ */
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ ret = fnic_send_frame(fnic, fp);
+ break;
+ }
+
+fnic_send_end:
+ if (old_flogi)
+ dev_kfree_skb(fp_skb(old_flogi));
+ if (old_flogi_resp)
+ dev_kfree_skb(fp_skb(old_flogi_resp));
+ return ret;
+}
+
+static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
+ struct cq_desc *cq_desc,
+ struct vnic_wq_buf *buf, void *opaque)
+{
+ struct sk_buff *skb = buf->os_buf;
+ struct fc_frame *fp = (struct fc_frame *)skb;
+ struct fnic *fnic = vnic_dev_priv(wq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr,
+ buf->len, PCI_DMA_TODEVICE);
+ dev_kfree_skb_irq(fp_skb(fp));
+ buf->os_buf = NULL;
+}
+
+static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
+ struct cq_desc *cq_desc, u8 type,
+ u16 q_number, u16 completed_index,
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(vdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
+ vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
+ fnic_wq_complete_frame_send, NULL);
+ spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
+
+ return 0;
+}
+
+int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
+{
+ unsigned int wq_work_done = 0;
+ unsigned int i;
+
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
+ work_to_do,
+ fnic_wq_cmpl_handler_cont,
+ NULL);
+ }
+
+ return wq_work_done;
+}
+
+
+void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
+{
+ struct fc_frame *fp = buf->os_buf;
+ struct fnic *fnic = vnic_dev_priv(wq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr,
+ buf->len, PCI_DMA_TODEVICE);
+
+ dev_kfree_skb(fp_skb(fp));
+ buf->os_buf = NULL;
+}
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FNIC_IO_H_
+#define _FNIC_IO_H_
+
+#include <scsi/fc/fc_fcp.h>
+
+#define FNIC_DFLT_SG_DESC_CNT 32
+#define FNIC_MAX_SG_DESC_CNT 1024 /* Maximum descriptors per sgl */
+#define FNIC_SG_DESC_ALIGN 16 /* Descriptor address alignment */
+
+struct host_sg_desc {
+ __le64 addr;
+ __le32 len;
+ u32 _resvd;
+};
+
+struct fnic_dflt_sgl_list {
+ struct host_sg_desc sg_desc[FNIC_DFLT_SG_DESC_CNT];
+};
+
+struct fnic_sgl_list {
+ struct host_sg_desc sg_desc[FNIC_MAX_SG_DESC_CNT];
+};
+
+enum fnic_sgl_list_type {
+ FNIC_SGL_CACHE_DFLT = 0, /* cache with default size sgl */
+ FNIC_SGL_CACHE_MAX, /* cache with max size sgl */
+ FNIC_SGL_NUM_CACHES /* number of sgl caches */
+};
+
+enum fnic_ioreq_state {
+ FNIC_IOREQ_CMD_PENDING = 0,
+ FNIC_IOREQ_ABTS_PENDING,
+ FNIC_IOREQ_ABTS_COMPLETE,
+ FNIC_IOREQ_CMD_COMPLETE,
+};
+
+struct fnic_io_req {
+ struct host_sg_desc *sgl_list; /* sgl list */
+ void *sgl_list_alloc; /* sgl list address used for free */
+ dma_addr_t sense_buf_pa; /* dma address for sense buffer*/
+ dma_addr_t sgl_list_pa; /* dma address for sgl list */
+ u16 sgl_cnt;
+ u8 sgl_type; /* device DMA descriptor list type */
+ u8 io_completed:1; /* set to 1 when fw completes IO */
+ u32 port_id; /* remote port DID */
+ struct completion *abts_done; /* completion for abts */
+ struct completion *dr_done; /* completion for device reset */
+};
+
+#endif /* _FNIC_IO_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "fnic_io.h"
+#include "fnic.h"
+
+static irqreturn_t fnic_isr_legacy(int irq, void *data)
+{
+ struct fnic *fnic = data;
+ u32 pba;
+ unsigned long work_done = 0;
+
+ pba = vnic_intr_legacy_pba(fnic->legacy_pba);
+ if (!pba)
+ return IRQ_NONE;
+
+ if (pba & (1 << FNIC_INTX_NOTIFY)) {
+ vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_NOTIFY]);
+ fnic_handle_link_event(fnic);
+ }
+
+ if (pba & (1 << FNIC_INTX_ERR)) {
+ vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_ERR]);
+ fnic_log_q_error(fnic);
+ }
+
+ if (pba & (1 << FNIC_INTX_WQ_RQ_COPYWQ)) {
+ work_done += fnic_wq_copy_cmpl_handler(fnic, 8);
+ work_done += fnic_wq_cmpl_handler(fnic, 4);
+ work_done += fnic_rq_cmpl_handler(fnic, 4);
+
+ vnic_intr_return_credits(&fnic->intr[FNIC_INTX_WQ_RQ_COPYWQ],
+ work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msi(int irq, void *data)
+{
+ struct fnic *fnic = data;
+ unsigned long work_done = 0;
+
+ work_done += fnic_wq_copy_cmpl_handler(fnic, 8);
+ work_done += fnic_wq_cmpl_handler(fnic, 4);
+ work_done += fnic_rq_cmpl_handler(fnic, 4);
+
+ vnic_intr_return_credits(&fnic->intr[0],
+ work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msix_rq(int irq, void *data)
+{
+ struct fnic *fnic = data;
+ unsigned long rq_work_done = 0;
+
+ rq_work_done = fnic_rq_cmpl_handler(fnic, 4);
+ vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_RQ],
+ rq_work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msix_wq(int irq, void *data)
+{
+ struct fnic *fnic = data;
+ unsigned long wq_work_done = 0;
+
+ wq_work_done = fnic_wq_cmpl_handler(fnic, 4);
+ vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_WQ],
+ wq_work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msix_wq_copy(int irq, void *data)
+{
+ struct fnic *fnic = data;
+ unsigned long wq_copy_work_done = 0;
+
+ wq_copy_work_done = fnic_wq_copy_cmpl_handler(fnic, 8);
+ vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_WQ_COPY],
+ wq_copy_work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msix_err_notify(int irq, void *data)
+{
+ struct fnic *fnic = data;
+
+ vnic_intr_return_all_credits(&fnic->intr[FNIC_MSIX_ERR_NOTIFY]);
+ fnic_log_q_error(fnic);
+ fnic_handle_link_event(fnic);
+
+ return IRQ_HANDLED;
+}
+
+void fnic_free_intr(struct fnic *fnic)
+{
+ int i;
+
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+ case VNIC_DEV_INTR_MODE_INTX:
+ case VNIC_DEV_INTR_MODE_MSI:
+ free_irq(fnic->pdev->irq, fnic);
+ break;
+
+ case VNIC_DEV_INTR_MODE_MSIX:
+ for (i = 0; i < ARRAY_SIZE(fnic->msix); i++)
+ if (fnic->msix[i].requested)
+ free_irq(fnic->msix_entry[i].vector,
+ fnic->msix[i].devid);
+ break;
+
+ default:
+ break;
+ }
+}
+
+int fnic_request_intr(struct fnic *fnic)
+{
+ int err = 0;
+ int i;
+
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+
+ case VNIC_DEV_INTR_MODE_INTX:
+ err = request_irq(fnic->pdev->irq, &fnic_isr_legacy,
+ IRQF_SHARED, DRV_NAME, fnic);
+ break;
+
+ case VNIC_DEV_INTR_MODE_MSI:
+ err = request_irq(fnic->pdev->irq, &fnic_isr_msi,
+ 0, fnic->name, fnic);
+ break;
+
+ case VNIC_DEV_INTR_MODE_MSIX:
+
+ sprintf(fnic->msix[FNIC_MSIX_RQ].devname,
+ "%.11s-fcs-rq", fnic->name);
+ fnic->msix[FNIC_MSIX_RQ].isr = fnic_isr_msix_rq;
+ fnic->msix[FNIC_MSIX_RQ].devid = fnic;
+
+ sprintf(fnic->msix[FNIC_MSIX_WQ].devname,
+ "%.11s-fcs-wq", fnic->name);
+ fnic->msix[FNIC_MSIX_WQ].isr = fnic_isr_msix_wq;
+ fnic->msix[FNIC_MSIX_WQ].devid = fnic;
+
+ sprintf(fnic->msix[FNIC_MSIX_WQ_COPY].devname,
+ "%.11s-scsi-wq", fnic->name);
+ fnic->msix[FNIC_MSIX_WQ_COPY].isr = fnic_isr_msix_wq_copy;
+ fnic->msix[FNIC_MSIX_WQ_COPY].devid = fnic;
+
+ sprintf(fnic->msix[FNIC_MSIX_ERR_NOTIFY].devname,
+ "%.11s-err-notify", fnic->name);
+ fnic->msix[FNIC_MSIX_ERR_NOTIFY].isr =
+ fnic_isr_msix_err_notify;
+ fnic->msix[FNIC_MSIX_ERR_NOTIFY].devid = fnic;
+
+ for (i = 0; i < ARRAY_SIZE(fnic->msix); i++) {
+ err = request_irq(fnic->msix_entry[i].vector,
+ fnic->msix[i].isr, 0,
+ fnic->msix[i].devname,
+ fnic->msix[i].devid);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "MSIX: request_irq"
+ " failed %d\n", err);
+ fnic_free_intr(fnic);
+ break;
+ }
+ fnic->msix[i].requested = 1;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ return err;
+}
+
+int fnic_set_intr_mode(struct fnic *fnic)
+{
+ unsigned int n = ARRAY_SIZE(fnic->rq);
+ unsigned int m = ARRAY_SIZE(fnic->wq);
+ unsigned int o = ARRAY_SIZE(fnic->wq_copy);
+ unsigned int i;
+
+ /*
+ * Set interrupt mode (INTx, MSI, MSI-X) depending
+ * system capabilities.
+ *
+ * Try MSI-X first
+ *
+ * We need n RQs, m WQs, o Copy WQs, n+m+o CQs, and n+m+o+1 INTRs
+ * (last INTR is used for WQ/RQ errors and notification area)
+ */
+
+ BUG_ON(ARRAY_SIZE(fnic->msix_entry) < n + m + o + 1);
+ for (i = 0; i < n + m + o + 1; i++)
+ fnic->msix_entry[i].entry = i;
+
+ if (fnic->rq_count >= n &&
+ fnic->raw_wq_count >= m &&
+ fnic->wq_copy_count >= o &&
+ fnic->cq_count >= n + m + o) {
+ if (!pci_enable_msix(fnic->pdev, fnic->msix_entry,
+ n + m + o + 1)) {
+ fnic->rq_count = n;
+ fnic->raw_wq_count = m;
+ fnic->wq_copy_count = o;
+ fnic->wq_count = m + o;
+ fnic->cq_count = n + m + o;
+ fnic->intr_count = n + m + o + 1;
+ fnic->err_intr_offset = FNIC_MSIX_ERR_NOTIFY;
+
+ FNIC_ISR_DBG(KERN_DEBUG, fnic->lport->host,
+ "Using MSI-X Interrupts\n");
+ vnic_dev_set_intr_mode(fnic->vdev,
+ VNIC_DEV_INTR_MODE_MSIX);
+ return 0;
+ }
+ }
+
+ /*
+ * Next try MSI
+ * We need 1 RQ, 1 WQ, 1 WQ_COPY, 3 CQs, and 1 INTR
+ */
+ if (fnic->rq_count >= 1 &&
+ fnic->raw_wq_count >= 1 &&
+ fnic->wq_copy_count >= 1 &&
+ fnic->cq_count >= 3 &&
+ fnic->intr_count >= 1 &&
+ !pci_enable_msi(fnic->pdev)) {
+
+ fnic->rq_count = 1;
+ fnic->raw_wq_count = 1;
+ fnic->wq_copy_count = 1;
+ fnic->wq_count = 2;
+ fnic->cq_count = 3;
+ fnic->intr_count = 1;
+ fnic->err_intr_offset = 0;
+
+ FNIC_ISR_DBG(KERN_DEBUG, fnic->lport->host,
+ "Using MSI Interrupts\n");
+ vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_MSI);
+
+ return 0;
+ }
+
+ /*
+ * Next try INTx
+ * We need 1 RQ, 1 WQ, 1 WQ_COPY, 3 CQs, and 3 INTRs
+ * 1 INTR is used for all 3 queues, 1 INTR for queue errors
+ * 1 INTR for notification area
+ */
+
+ if (fnic->rq_count >= 1 &&
+ fnic->raw_wq_count >= 1 &&
+ fnic->wq_copy_count >= 1 &&
+ fnic->cq_count >= 3 &&
+ fnic->intr_count >= 3) {
+
+ fnic->rq_count = 1;
+ fnic->raw_wq_count = 1;
+ fnic->wq_copy_count = 1;
+ fnic->cq_count = 3;
+ fnic->intr_count = 3;
+
+ FNIC_ISR_DBG(KERN_DEBUG, fnic->lport->host,
+ "Using Legacy Interrupts\n");
+ vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_INTX);
+
+ return 0;
+ }
+
+ vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
+
+ return -EINVAL;
+}
+
+void fnic_clear_intr_mode(struct fnic *fnic)
+{
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+ case VNIC_DEV_INTR_MODE_MSIX:
+ pci_disable_msix(fnic->pdev);
+ break;
+ case VNIC_DEV_INTR_MODE_MSI:
+ pci_disable_msi(fnic->pdev);
+ break;
+ default:
+ break;
+ }
+
+ vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_INTX);
+}
+
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/module.h>
+#include <linux/mempool.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "fnic_io.h"
+#include "fnic.h"
+
+#define PCI_DEVICE_ID_CISCO_FNIC 0x0045
+
+/* Timer to poll notification area for events. Used for MSI interrupts */
+#define FNIC_NOTIFY_TIMER_PERIOD (2 * HZ)
+
+static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
+static struct kmem_cache *fnic_io_req_cache;
+LIST_HEAD(fnic_list);
+DEFINE_SPINLOCK(fnic_list_lock);
+
+/* Supported devices by fnic module */
+static struct pci_device_id fnic_id_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
+ { 0, }
+};
+
+MODULE_DESCRIPTION(DRV_DESCRIPTION);
+MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
+ "Joseph R. Eykholt <jeykholt@cisco.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DEVICE_TABLE(pci, fnic_id_table);
+
+unsigned int fnic_log_level;
+module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
+
+
+static struct libfc_function_template fnic_transport_template = {
+ .frame_send = fnic_send,
+ .fcp_abort_io = fnic_empty_scsi_cleanup,
+ .fcp_cleanup = fnic_empty_scsi_cleanup,
+ .exch_mgr_reset = fnic_exch_mgr_reset
+};
+
+static int fnic_slave_alloc(struct scsi_device *sdev)
+{
+ struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+ struct fc_lport *lp = shost_priv(sdev->host);
+ struct fnic *fnic = lport_priv(lp);
+
+ sdev->tagged_supported = 1;
+
+ if (!rport || fc_remote_port_chkready(rport))
+ return -ENXIO;
+
+ scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
+ rport->dev_loss_tmo = fnic->config.port_down_timeout / 1000;
+
+ return 0;
+}
+
+static struct scsi_host_template fnic_host_template = {
+ .module = THIS_MODULE,
+ .name = DRV_NAME,
+ .queuecommand = fnic_queuecommand,
+ .eh_abort_handler = fnic_abort_cmd,
+ .eh_device_reset_handler = fnic_device_reset,
+ .eh_host_reset_handler = fnic_host_reset,
+ .slave_alloc = fnic_slave_alloc,
+ .change_queue_depth = fc_change_queue_depth,
+ .change_queue_type = fc_change_queue_type,
+ .this_id = -1,
+ .cmd_per_lun = 3,
+ .can_queue = FNIC_MAX_IO_REQ,
+ .use_clustering = ENABLE_CLUSTERING,
+ .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
+ .max_sectors = 0xffff,
+ .shost_attrs = fnic_attrs,
+};
+
+static void fnic_get_host_speed(struct Scsi_Host *shost);
+static struct scsi_transport_template *fnic_fc_transport;
+static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
+
+static struct fc_function_template fnic_fc_functions = {
+
+ .show_host_node_name = 1,
+ .show_host_port_name = 1,
+ .show_host_supported_classes = 1,
+ .show_host_supported_fc4s = 1,
+ .show_host_active_fc4s = 1,
+ .show_host_maxframe_size = 1,
+ .show_host_port_id = 1,
+ .show_host_supported_speeds = 1,
+ .get_host_speed = fnic_get_host_speed,
+ .show_host_speed = 1,
+ .show_host_port_type = 1,
+ .get_host_port_state = fc_get_host_port_state,
+ .show_host_port_state = 1,
+ .show_host_symbolic_name = 1,
+ .show_rport_maxframe_size = 1,
+ .show_rport_supported_classes = 1,
+ .show_host_fabric_name = 1,
+ .show_starget_node_name = 1,
+ .show_starget_port_name = 1,
+ .show_starget_port_id = 1,
+ .show_rport_dev_loss_tmo = 1,
+ .issue_fc_host_lip = fnic_reset,
+ .get_fc_host_stats = fnic_get_stats,
+ .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+ .terminate_rport_io = fnic_terminate_rport_io,
+};
+
+static void fnic_get_host_speed(struct Scsi_Host *shost)
+{
+ struct fc_lport *lp = shost_priv(shost);
+ struct fnic *fnic = lport_priv(lp);
+ u32 port_speed = vnic_dev_port_speed(fnic->vdev);
+
+ /* Add in other values as they get defined in fw */
+ switch (port_speed) {
+ case 10000:
+ fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
+ break;
+ default:
+ fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
+ break;
+ }
+}
+
+static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
+{
+ int ret;
+ struct fc_lport *lp = shost_priv(host);
+ struct fnic *fnic = lport_priv(lp);
+ struct fc_host_statistics *stats = &lp->host_stats;
+ struct vnic_stats *vs;
+ unsigned long flags;
+
+ if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
+ return stats;
+ fnic->stats_time = jiffies;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (ret) {
+ FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic: Get vnic stats failed"
+ " 0x%x", ret);
+ return stats;
+ }
+ vs = fnic->stats;
+ stats->tx_frames = vs->tx.tx_unicast_frames_ok;
+ stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
+ stats->rx_frames = vs->rx.rx_unicast_frames_ok;
+ stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
+ stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
+ stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
+ stats->invalid_crc_count = vs->rx.rx_crc_errors;
+ stats->seconds_since_last_reset = (jiffies - lp->boot_time) / HZ;
+ stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
+ stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
+
+ return stats;
+}
+
+void fnic_log_q_error(struct fnic *fnic)
+{
+ unsigned int i;
+ u32 error_status;
+
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ error_status = ioread32(&fnic->wq[i].ctrl->error_status);
+ if (error_status)
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "WQ[%d] error_status"
+ " %d\n", i, error_status);
+ }
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ error_status = ioread32(&fnic->rq[i].ctrl->error_status);
+ if (error_status)
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "RQ[%d] error_status"
+ " %d\n", i, error_status);
+ }
+
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
+ if (error_status)
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "CWQ[%d] error_status"
+ " %d\n", i, error_status);
+ }
+}
+
+void fnic_handle_link_event(struct fnic *fnic)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ queue_work(fnic_event_queue, &fnic->link_work);
+
+}
+
+static int fnic_notify_set(struct fnic *fnic)
+{
+ int err;
+
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+ case VNIC_DEV_INTR_MODE_INTX:
+ err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
+ break;
+ case VNIC_DEV_INTR_MODE_MSI:
+ err = vnic_dev_notify_set(fnic->vdev, -1);
+ break;
+ case VNIC_DEV_INTR_MODE_MSIX:
+ err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
+ break;
+ default:
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Interrupt mode should be set up"
+ " before devcmd notify set %d\n",
+ vnic_dev_get_intr_mode(fnic->vdev));
+ err = -1;
+ break;
+ }
+
+ return err;
+}
+
+static void fnic_notify_timer(unsigned long data)
+{
+ struct fnic *fnic = (struct fnic *)data;
+
+ fnic_handle_link_event(fnic);
+ mod_timer(&fnic->notify_timer,
+ round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
+}
+
+static void fnic_notify_timer_start(struct fnic *fnic)
+{
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+ case VNIC_DEV_INTR_MODE_MSI:
+ /*
+ * Schedule first timeout immediately. The driver is
+ * initiatialized and ready to look for link up notification
+ */
+ mod_timer(&fnic->notify_timer, jiffies);
+ break;
+ default:
+ /* Using intr for notification for INTx/MSI-X */
+ break;
+ };
+}
+
+static int fnic_dev_wait(struct vnic_dev *vdev,
+ int (*start)(struct vnic_dev *, int),
+ int (*finished)(struct vnic_dev *, int *),
+ int arg)
+{
+ unsigned long time;
+ int done;
+ int err;
+
+ err = start(vdev, arg);
+ if (err)
+ return err;
+
+ /* Wait for func to complete...2 seconds max */
+ time = jiffies + (HZ * 2);
+ do {
+ err = finished(vdev, &done);
+ if (err)
+ return err;
+ if (done)
+ return 0;
+ schedule_timeout_uninterruptible(HZ / 10);
+ } while (time_after(time, jiffies));
+
+ return -ETIMEDOUT;
+}
+
+static int fnic_cleanup(struct fnic *fnic)
+{
+ unsigned int i;
+ int err;
+ unsigned long flags;
+ struct fc_frame *flogi = NULL;
+ struct fc_frame *flogi_resp = NULL;
+
+ vnic_dev_disable(fnic->vdev);
+ for (i = 0; i < fnic->intr_count; i++)
+ vnic_intr_mask(&fnic->intr[i]);
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ err = vnic_rq_disable(&fnic->rq[i]);
+ if (err)
+ return err;
+ }
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ err = vnic_wq_disable(&fnic->wq[i]);
+ if (err)
+ return err;
+ }
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
+ if (err)
+ return err;
+ }
+
+ /* Clean up completed IOs and FCS frames */
+ fnic_wq_copy_cmpl_handler(fnic, -1);
+ fnic_wq_cmpl_handler(fnic, -1);
+ fnic_rq_cmpl_handler(fnic, -1);
+
+ /* Clean up the IOs and FCS frames that have not completed */
+ for (i = 0; i < fnic->raw_wq_count; i++)
+ vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
+ for (i = 0; i < fnic->rq_count; i++)
+ vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
+ for (i = 0; i < fnic->wq_copy_count; i++)
+ vnic_wq_copy_clean(&fnic->wq_copy[i],
+ fnic_wq_copy_cleanup_handler);
+
+ for (i = 0; i < fnic->cq_count; i++)
+ vnic_cq_clean(&fnic->cq[i]);
+ for (i = 0; i < fnic->intr_count; i++)
+ vnic_intr_clean(&fnic->intr[i]);
+
+ /*
+ * Remove cached flogi and flogi resp frames if any
+ * These frames are not in any queue, and therefore queue
+ * cleanup does not clean them. So clean them explicitly
+ */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ flogi = fnic->flogi;
+ fnic->flogi = NULL;
+ flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (flogi)
+ dev_kfree_skb(fp_skb(flogi));
+
+ if (flogi_resp)
+ dev_kfree_skb(fp_skb(flogi_resp));
+
+ mempool_destroy(fnic->io_req_pool);
+ for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
+ mempool_destroy(fnic->io_sgl_pool[i]);
+
+ return 0;
+}
+
+static void fnic_iounmap(struct fnic *fnic)
+{
+ if (fnic->bar0.vaddr)
+ iounmap(fnic->bar0.vaddr);
+}
+
+/*
+ * Allocate element for mempools requiring GFP_DMA flag.
+ * Otherwise, checks in kmem_flagcheck() hit BUG_ON().
+ */
+static void *fnic_alloc_slab_dma(gfp_t gfp_mask, void *pool_data)
+{
+ struct kmem_cache *mem = pool_data;
+
+ return kmem_cache_alloc(mem, gfp_mask | GFP_ATOMIC | GFP_DMA);
+}
+
+static int __devinit fnic_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct Scsi_Host *host;
+ struct fc_lport *lp;
+ struct fnic *fnic;
+ mempool_t *pool;
+ int err;
+ int i;
+ unsigned long flags;
+
+ /*
+ * Allocate SCSI Host and set up association between host,
+ * local port, and fnic
+ */
+ host = scsi_host_alloc(&fnic_host_template,
+ sizeof(struct fc_lport) + sizeof(struct fnic));
+ if (!host) {
+ printk(KERN_ERR PFX "Unable to alloc SCSI host\n");
+ err = -ENOMEM;
+ goto err_out;
+ }
+ lp = shost_priv(host);
+ lp->host = host;
+ fnic = lport_priv(lp);
+ fnic->lport = lp;
+
+ snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
+ host->host_no);
+
+ host->transportt = fnic_fc_transport;
+
+ err = scsi_init_shared_tag_map(host, FNIC_MAX_IO_REQ);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Unable to alloc shared tag map\n");
+ goto err_out_free_hba;
+ }
+
+ /* Setup PCI resources */
+ pci_set_drvdata(pdev, fnic);
+
+ fnic->pdev = pdev;
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Cannot enable PCI device, aborting.\n");
+ goto err_out_free_hba;
+ }
+
+ err = pci_request_regions(pdev, DRV_NAME);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Cannot enable PCI resources, aborting\n");
+ goto err_out_disable_device;
+ }
+
+ pci_set_master(pdev);
+
+ /* Query PCI controller on system for DMA addressing
+ * limitation for the device. Try 40-bit first, and
+ * fail to 32-bit.
+ */
+ err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
+ if (err) {
+ err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "No usable DMA configuration "
+ "aborting\n");
+ goto err_out_release_regions;
+ }
+ err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Unable to obtain 32-bit DMA "
+ "for consistent allocations, aborting.\n");
+ goto err_out_release_regions;
+ }
+ } else {
+ err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Unable to obtain 40-bit DMA "
+ "for consistent allocations, aborting.\n");
+ goto err_out_release_regions;
+ }
+ }
+
+ /* Map vNIC resources from BAR0 */
+ if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "BAR0 not memory-map'able, aborting.\n");
+ err = -ENODEV;
+ goto err_out_release_regions;
+ }
+
+ fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
+ fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
+ fnic->bar0.len = pci_resource_len(pdev, 0);
+
+ if (!fnic->bar0.vaddr) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Cannot memory-map BAR0 res hdr, "
+ "aborting.\n");
+ err = -ENODEV;
+ goto err_out_release_regions;
+ }
+
+ fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
+ if (!fnic->vdev) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "vNIC registration failed, "
+ "aborting.\n");
+ err = -ENODEV;
+ goto err_out_iounmap;
+ }
+
+ err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
+ vnic_dev_open_done, 0);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "vNIC dev open failed, aborting.\n");
+ goto err_out_vnic_unregister;
+ }
+
+ err = vnic_dev_init(fnic->vdev, 0);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "vNIC dev init failed, aborting.\n");
+ goto err_out_dev_close;
+ }
+
+ err = vnic_dev_mac_addr(fnic->vdev, fnic->mac_addr);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "vNIC get MAC addr failed \n");
+ goto err_out_dev_close;
+ }
+
+ /* Get vNIC configuration */
+ err = fnic_get_vnic_config(fnic);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Get vNIC configuration failed, "
+ "aborting.\n");
+ goto err_out_dev_close;
+ }
+ host->max_lun = fnic->config.luns_per_tgt;
+ host->max_id = FNIC_MAX_FCP_TARGET;
+
+ fnic_get_res_counts(fnic);
+
+ err = fnic_set_intr_mode(fnic);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Failed to set intr mode, "
+ "aborting.\n");
+ goto err_out_dev_close;
+ }
+
+ err = fnic_request_intr(fnic);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Unable to request irq.\n");
+ goto err_out_clear_intr;
+ }
+
+ err = fnic_alloc_vnic_resources(fnic);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Failed to alloc vNIC resources, "
+ "aborting.\n");
+ goto err_out_free_intr;
+ }
+
+
+ /* initialize all fnic locks */
+ spin_lock_init(&fnic->fnic_lock);
+
+ for (i = 0; i < FNIC_WQ_MAX; i++)
+ spin_lock_init(&fnic->wq_lock[i]);
+
+ for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
+ spin_lock_init(&fnic->wq_copy_lock[i]);
+ fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
+ fnic->fw_ack_recd[i] = 0;
+ fnic->fw_ack_index[i] = -1;
+ }
+
+ for (i = 0; i < FNIC_IO_LOCKS; i++)
+ spin_lock_init(&fnic->io_req_lock[i]);
+
+ fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
+ if (!fnic->io_req_pool)
+ goto err_out_free_resources;
+
+ pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
+ fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
+ if (!pool)
+ goto err_out_free_ioreq_pool;
+ fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
+
+ pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
+ fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
+ if (!pool)
+ goto err_out_free_dflt_pool;
+ fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
+
+ /* setup vlan config, hw inserts vlan header */
+ fnic->vlan_hw_insert = 1;
+ fnic->vlan_id = 0;
+
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+ fnic->flogi = NULL;
+ fnic->flogi_resp = NULL;
+ fnic->state = FNIC_IN_FC_MODE;
+
+ /* Enable hardware stripping of vlan header on ingress */
+ fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
+
+ /* Setup notification buffer area */
+ err = fnic_notify_set(fnic);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Failed to alloc notify buffer, aborting.\n");
+ goto err_out_free_max_pool;
+ }
+
+ /* Setup notify timer when using MSI interrupts */
+ if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
+ setup_timer(&fnic->notify_timer,
+ fnic_notify_timer, (unsigned long)fnic);
+
+ /* allocate RQ buffers and post them to RQ*/
+ for (i = 0; i < fnic->rq_count; i++) {
+ err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "fnic_alloc_rq_frame can't alloc "
+ "frame\n");
+ goto err_out_free_rq_buf;
+ }
+ }
+
+ /*
+ * Initialization done with PCI system, hardware, firmware.
+ * Add host to SCSI
+ */
+ err = scsi_add_host(lp->host, &pdev->dev);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "fnic: scsi_add_host failed...exiting\n");
+ goto err_out_free_rq_buf;
+ }
+
+ /* Start local port initiatialization */
+
+ lp->link_up = 0;
+ lp->tt = fnic_transport_template;
+
+ lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
+ FCPIO_HOST_EXCH_RANGE_START,
+ FCPIO_HOST_EXCH_RANGE_END);
+ if (!lp->emp) {
+ err = -ENOMEM;
+ goto err_out_remove_scsi_host;
+ }
+
+ lp->max_retry_count = fnic->config.flogi_retries;
+ lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+ FCP_SPPF_CONF_COMPL);
+ if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
+ lp->service_params |= FCP_SPPF_RETRY;
+
+ lp->boot_time = jiffies;
+ lp->e_d_tov = fnic->config.ed_tov;
+ lp->r_a_tov = fnic->config.ra_tov;
+ lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
+ fc_set_wwnn(lp, fnic->config.node_wwn);
+ fc_set_wwpn(lp, fnic->config.port_wwn);
+
+ fc_exch_init(lp);
+ fc_lport_init(lp);
+ fc_elsct_init(lp);
+ fc_rport_init(lp);
+ fc_disc_init(lp);
+
+ fc_lport_config(lp);
+
+ if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
+ sizeof(struct fc_frame_header))) {
+ err = -EINVAL;
+ goto err_out_free_exch_mgr;
+ }
+ fc_host_maxframe_size(lp->host) = lp->mfs;
+
+ sprintf(fc_host_symbolic_name(lp->host),
+ DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
+
+ spin_lock_irqsave(&fnic_list_lock, flags);
+ list_add_tail(&fnic->list, &fnic_list);
+ spin_unlock_irqrestore(&fnic_list_lock, flags);
+
+ INIT_WORK(&fnic->link_work, fnic_handle_link);
+ INIT_WORK(&fnic->frame_work, fnic_handle_frame);
+ skb_queue_head_init(&fnic->frame_queue);
+
+ /* Enable all queues */
+ for (i = 0; i < fnic->raw_wq_count; i++)
+ vnic_wq_enable(&fnic->wq[i]);
+ for (i = 0; i < fnic->rq_count; i++)
+ vnic_rq_enable(&fnic->rq[i]);
+ for (i = 0; i < fnic->wq_copy_count; i++)
+ vnic_wq_copy_enable(&fnic->wq_copy[i]);
+
+ fc_fabric_login(lp);
+
+ vnic_dev_enable(fnic->vdev);
+ for (i = 0; i < fnic->intr_count; i++)
+ vnic_intr_unmask(&fnic->intr[i]);
+
+ fnic_notify_timer_start(fnic);
+
+ return 0;
+
+err_out_free_exch_mgr:
+ fc_exch_mgr_free(lp->emp);
+err_out_remove_scsi_host:
+ fc_remove_host(fnic->lport->host);
+ scsi_remove_host(fnic->lport->host);
+err_out_free_rq_buf:
+ for (i = 0; i < fnic->rq_count; i++)
+ vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
+ vnic_dev_notify_unset(fnic->vdev);
+err_out_free_max_pool:
+ mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
+err_out_free_dflt_pool:
+ mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
+err_out_free_ioreq_pool:
+ mempool_destroy(fnic->io_req_pool);
+err_out_free_resources:
+ fnic_free_vnic_resources(fnic);
+err_out_free_intr:
+ fnic_free_intr(fnic);
+err_out_clear_intr:
+ fnic_clear_intr_mode(fnic);
+err_out_dev_close:
+ vnic_dev_close(fnic->vdev);
+err_out_vnic_unregister:
+ vnic_dev_unregister(fnic->vdev);
+err_out_iounmap:
+ fnic_iounmap(fnic);
+err_out_release_regions:
+ pci_release_regions(pdev);
+err_out_disable_device:
+ pci_disable_device(pdev);
+err_out_free_hba:
+ scsi_host_put(lp->host);
+err_out:
+ return err;
+}
+
+static void __devexit fnic_remove(struct pci_dev *pdev)
+{
+ struct fnic *fnic = pci_get_drvdata(pdev);
+ unsigned long flags;
+
+ /*
+ * Mark state so that the workqueue thread stops forwarding
+ * received frames and link events to the local port. ISR and
+ * other threads that can queue work items will also stop
+ * creating work items on the fnic workqueue
+ */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->stop_rx_link_events = 1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
+ del_timer_sync(&fnic->notify_timer);
+
+ /*
+ * Flush the fnic event queue. After this call, there should
+ * be no event queued for this fnic device in the workqueue
+ */
+ flush_workqueue(fnic_event_queue);
+ skb_queue_purge(&fnic->frame_queue);
+
+ /*
+ * Log off the fabric. This stops all remote ports, dns port,
+ * logs off the fabric. This flushes all rport, disc, lport work
+ * before returning
+ */
+ fc_fabric_logoff(fnic->lport);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->in_remove = 1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ fc_lport_destroy(fnic->lport);
+
+ /*
+ * This stops the fnic device, masks all interrupts. Completed
+ * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
+ * cleaned up
+ */
+ fnic_cleanup(fnic);
+
+ BUG_ON(!skb_queue_empty(&fnic->frame_queue));
+
+ spin_lock_irqsave(&fnic_list_lock, flags);
+ list_del(&fnic->list);
+ spin_unlock_irqrestore(&fnic_list_lock, flags);
+
+ fc_remove_host(fnic->lport->host);
+ scsi_remove_host(fnic->lport->host);
+ fc_exch_mgr_free(fnic->lport->emp);
+ vnic_dev_notify_unset(fnic->vdev);
+ fnic_free_vnic_resources(fnic);
+ fnic_free_intr(fnic);
+ fnic_clear_intr_mode(fnic);
+ vnic_dev_close(fnic->vdev);
+ vnic_dev_unregister(fnic->vdev);
+ fnic_iounmap(fnic);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ pci_set_drvdata(pdev, NULL);
+ scsi_host_put(fnic->lport->host);
+}
+
+static struct pci_driver fnic_driver = {
+ .name = DRV_NAME,
+ .id_table = fnic_id_table,
+ .probe = fnic_probe,
+ .remove = __devexit_p(fnic_remove),
+};
+
+static int __init fnic_init_module(void)
+{
+ size_t len;
+ int err = 0;
+
+ printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
+
+ /* Create a cache for allocation of default size sgls */
+ len = sizeof(struct fnic_dflt_sgl_list);
+ fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
+ ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
+ SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
+ NULL);
+ if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
+ printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
+ err = -ENOMEM;
+ goto err_create_fnic_sgl_slab_dflt;
+ }
+
+ /* Create a cache for allocation of max size sgls*/
+ len = sizeof(struct fnic_sgl_list);
+ fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
+ ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
+ SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
+ NULL);
+ if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
+ printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
+ err = -ENOMEM;
+ goto err_create_fnic_sgl_slab_max;
+ }
+
+ /* Create a cache of io_req structs for use via mempool */
+ fnic_io_req_cache = kmem_cache_create("fnic_io_req",
+ sizeof(struct fnic_io_req),
+ 0, SLAB_HWCACHE_ALIGN, NULL);
+ if (!fnic_io_req_cache) {
+ printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
+ err = -ENOMEM;
+ goto err_create_fnic_ioreq_slab;
+ }
+
+ fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
+ if (!fnic_event_queue) {
+ printk(KERN_ERR PFX "fnic work queue create failed\n");
+ err = -ENOMEM;
+ goto err_create_fnic_workq;
+ }
+
+ spin_lock_init(&fnic_list_lock);
+ INIT_LIST_HEAD(&fnic_list);
+
+ fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
+ if (!fnic_fc_transport) {
+ printk(KERN_ERR PFX "fc_attach_transport error\n");
+ err = -ENOMEM;
+ goto err_fc_transport;
+ }
+
+ /* register the driver with PCI system */
+ err = pci_register_driver(&fnic_driver);
+ if (err < 0) {
+ printk(KERN_ERR PFX "pci register error\n");
+ goto err_pci_register;
+ }
+ return err;
+
+err_pci_register:
+ fc_release_transport(fnic_fc_transport);
+err_fc_transport:
+ destroy_workqueue(fnic_event_queue);
+err_create_fnic_workq:
+ kmem_cache_destroy(fnic_io_req_cache);
+err_create_fnic_ioreq_slab:
+ kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
+err_create_fnic_sgl_slab_max:
+ kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
+err_create_fnic_sgl_slab_dflt:
+ return err;
+}
+
+static void __exit fnic_cleanup_module(void)
+{
+ pci_unregister_driver(&fnic_driver);
+ destroy_workqueue(fnic_event_queue);
+ kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
+ kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
+ kmem_cache_destroy(fnic_io_req_cache);
+ fc_release_transport(fnic_fc_transport);
+}
+
+module_init(fnic_init_module);
+module_exit(fnic_cleanup_module);
+
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include "wq_enet_desc.h"
+#include "rq_enet_desc.h"
+#include "cq_enet_desc.h"
+#include "vnic_resource.h"
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "vnic_cq.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "vnic_nic.h"
+#include "fnic.h"
+
+int fnic_get_vnic_config(struct fnic *fnic)
+{
+ struct vnic_fc_config *c = &fnic->config;
+ int err;
+
+#define GET_CONFIG(m) \
+ do { \
+ err = vnic_dev_spec(fnic->vdev, \
+ offsetof(struct vnic_fc_config, m), \
+ sizeof(c->m), &c->m); \
+ if (err) { \
+ shost_printk(KERN_ERR, fnic->lport->host, \
+ "Error getting %s, %d\n", #m, \
+ err); \
+ return err; \
+ } \
+ } while (0);
+
+ GET_CONFIG(node_wwn);
+ GET_CONFIG(port_wwn);
+ GET_CONFIG(wq_enet_desc_count);
+ GET_CONFIG(wq_copy_desc_count);
+ GET_CONFIG(rq_desc_count);
+ GET_CONFIG(maxdatafieldsize);
+ GET_CONFIG(ed_tov);
+ GET_CONFIG(ra_tov);
+ GET_CONFIG(intr_timer);
+ GET_CONFIG(intr_timer_type);
+ GET_CONFIG(flags);
+ GET_CONFIG(flogi_retries);
+ GET_CONFIG(flogi_timeout);
+ GET_CONFIG(plogi_retries);
+ GET_CONFIG(plogi_timeout);
+ GET_CONFIG(io_throttle_count);
+ GET_CONFIG(link_down_timeout);
+ GET_CONFIG(port_down_timeout);
+ GET_CONFIG(port_down_io_retries);
+ GET_CONFIG(luns_per_tgt);
+
+ c->wq_enet_desc_count =
+ min_t(u32, VNIC_FNIC_WQ_DESCS_MAX,
+ max_t(u32, VNIC_FNIC_WQ_DESCS_MIN,
+ c->wq_enet_desc_count));
+ c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
+
+ c->wq_copy_desc_count =
+ min_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MAX,
+ max_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MIN,
+ c->wq_copy_desc_count));
+ c->wq_copy_desc_count = ALIGN(c->wq_copy_desc_count, 16);
+
+ c->rq_desc_count =
+ min_t(u32, VNIC_FNIC_RQ_DESCS_MAX,
+ max_t(u32, VNIC_FNIC_RQ_DESCS_MIN,
+ c->rq_desc_count));
+ c->rq_desc_count = ALIGN(c->rq_desc_count, 16);
+
+ c->maxdatafieldsize =
+ min_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MAX,
+ max_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MIN,
+ c->maxdatafieldsize));
+ c->ed_tov =
+ min_t(u32, VNIC_FNIC_EDTOV_MAX,
+ max_t(u32, VNIC_FNIC_EDTOV_MIN,
+ c->ed_tov));
+
+ c->ra_tov =
+ min_t(u32, VNIC_FNIC_RATOV_MAX,
+ max_t(u32, VNIC_FNIC_RATOV_MIN,
+ c->ra_tov));
+
+ c->flogi_retries =
+ min_t(u32, VNIC_FNIC_FLOGI_RETRIES_MAX, c->flogi_retries);
+
+ c->flogi_timeout =
+ min_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MAX,
+ max_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MIN,
+ c->flogi_timeout));
+
+ c->plogi_retries =
+ min_t(u32, VNIC_FNIC_PLOGI_RETRIES_MAX, c->plogi_retries);
+
+ c->plogi_timeout =
+ min_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MAX,
+ max_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MIN,
+ c->plogi_timeout));
+
+ c->io_throttle_count =
+ min_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MAX,
+ max_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MIN,
+ c->io_throttle_count));
+
+ c->link_down_timeout =
+ min_t(u32, VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX,
+ c->link_down_timeout);
+
+ c->port_down_timeout =
+ min_t(u32, VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX,
+ c->port_down_timeout);
+
+ c->port_down_io_retries =
+ min_t(u32, VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX,
+ c->port_down_io_retries);
+
+ c->luns_per_tgt =
+ min_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MAX,
+ max_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MIN,
+ c->luns_per_tgt));
+
+ c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
+ c->intr_timer_type = c->intr_timer_type;
+
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC MAC addr %02x:%02x:%02x:%02x:%02x:%02x "
+ "wq/wq_copy/rq %d/%d/%d\n",
+ fnic->mac_addr[0], fnic->mac_addr[1], fnic->mac_addr[2],
+ fnic->mac_addr[3], fnic->mac_addr[4], fnic->mac_addr[5],
+ c->wq_enet_desc_count, c->wq_copy_desc_count,
+ c->rq_desc_count);
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC node wwn %llx port wwn %llx\n",
+ c->node_wwn, c->port_wwn);
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC ed_tov %d ra_tov %d\n",
+ c->ed_tov, c->ra_tov);
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC mtu %d intr timer %d\n",
+ c->maxdatafieldsize, c->intr_timer);
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC flags 0x%x luns per tgt %d\n",
+ c->flags, c->luns_per_tgt);
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC flogi_retries %d flogi timeout %d\n",
+ c->flogi_retries, c->flogi_timeout);
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC plogi retries %d plogi timeout %d\n",
+ c->plogi_retries, c->plogi_timeout);
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC io throttle count %d link dn timeout %d\n",
+ c->io_throttle_count, c->link_down_timeout);
+ shost_printk(KERN_INFO, fnic->lport->host,
+ "vNIC port dn io retries %d port dn timeout %d\n",
+ c->port_down_io_retries, c->port_down_timeout);
+
+ return 0;
+}
+
+int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
+ u8 rss_hash_type,
+ u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable,
+ u8 tso_ipid_split_en, u8 ig_vlan_strip_en)
+{
+ u64 a0, a1;
+ u32 nic_cfg;
+ int wait = 1000;
+
+ vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
+ rss_hash_type, rss_hash_bits, rss_base_cpu,
+ rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
+
+ a0 = nic_cfg;
+ a1 = 0;
+
+ return vnic_dev_cmd(fnic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
+}
+
+void fnic_get_res_counts(struct fnic *fnic)
+{
+ fnic->wq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_WQ);
+ fnic->raw_wq_count = fnic->wq_count - 1;
+ fnic->wq_copy_count = fnic->wq_count - fnic->raw_wq_count;
+ fnic->rq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_RQ);
+ fnic->cq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_CQ);
+ fnic->intr_count = vnic_dev_get_res_count(fnic->vdev,
+ RES_TYPE_INTR_CTRL);
+}
+
+void fnic_free_vnic_resources(struct fnic *fnic)
+{
+ unsigned int i;
+
+ for (i = 0; i < fnic->raw_wq_count; i++)
+ vnic_wq_free(&fnic->wq[i]);
+
+ for (i = 0; i < fnic->wq_copy_count; i++)
+ vnic_wq_copy_free(&fnic->wq_copy[i]);
+
+ for (i = 0; i < fnic->rq_count; i++)
+ vnic_rq_free(&fnic->rq[i]);
+
+ for (i = 0; i < fnic->cq_count; i++)
+ vnic_cq_free(&fnic->cq[i]);
+
+ for (i = 0; i < fnic->intr_count; i++)
+ vnic_intr_free(&fnic->intr[i]);
+}
+
+int fnic_alloc_vnic_resources(struct fnic *fnic)
+{
+ enum vnic_dev_intr_mode intr_mode;
+ unsigned int mask_on_assertion;
+ unsigned int interrupt_offset;
+ unsigned int error_interrupt_enable;
+ unsigned int error_interrupt_offset;
+ unsigned int i, cq_index;
+ unsigned int wq_copy_cq_desc_count;
+ int err;
+
+ intr_mode = vnic_dev_get_intr_mode(fnic->vdev);
+
+ shost_printk(KERN_INFO, fnic->lport->host, "vNIC interrupt mode: %s\n",
+ intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
+ intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
+ intr_mode == VNIC_DEV_INTR_MODE_MSIX ?
+ "MSI-X" : "unknown");
+
+ shost_printk(KERN_INFO, fnic->lport->host, "vNIC resources avail: "
+ "wq %d cp_wq %d raw_wq %d rq %d cq %d intr %d\n",
+ fnic->wq_count, fnic->wq_copy_count, fnic->raw_wq_count,
+ fnic->rq_count, fnic->cq_count, fnic->intr_count);
+
+ /* Allocate Raw WQ used for FCS frames */
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ err = vnic_wq_alloc(fnic->vdev, &fnic->wq[i], i,
+ fnic->config.wq_enet_desc_count,
+ sizeof(struct wq_enet_desc));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* Allocate Copy WQs used for SCSI IOs */
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ err = vnic_wq_copy_alloc(fnic->vdev, &fnic->wq_copy[i],
+ (fnic->raw_wq_count + i),
+ fnic->config.wq_copy_desc_count,
+ sizeof(struct fcpio_host_req));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* RQ for receiving FCS frames */
+ for (i = 0; i < fnic->rq_count; i++) {
+ err = vnic_rq_alloc(fnic->vdev, &fnic->rq[i], i,
+ fnic->config.rq_desc_count,
+ sizeof(struct rq_enet_desc));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* CQ for each RQ */
+ for (i = 0; i < fnic->rq_count; i++) {
+ cq_index = i;
+ err = vnic_cq_alloc(fnic->vdev,
+ &fnic->cq[cq_index], cq_index,
+ fnic->config.rq_desc_count,
+ sizeof(struct cq_enet_rq_desc));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* CQ for each WQ */
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ cq_index = fnic->rq_count + i;
+ err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index], cq_index,
+ fnic->config.wq_enet_desc_count,
+ sizeof(struct cq_enet_wq_desc));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* CQ for each COPY WQ */
+ wq_copy_cq_desc_count = (fnic->config.wq_copy_desc_count * 3);
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ cq_index = fnic->raw_wq_count + fnic->rq_count + i;
+ err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index],
+ cq_index,
+ wq_copy_cq_desc_count,
+ sizeof(struct fcpio_fw_req));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ for (i = 0; i < fnic->intr_count; i++) {
+ err = vnic_intr_alloc(fnic->vdev, &fnic->intr[i], i);
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ fnic->legacy_pba = vnic_dev_get_res(fnic->vdev,
+ RES_TYPE_INTR_PBA_LEGACY, 0);
+
+ if (!fnic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Failed to hook legacy pba resource\n");
+ err = -ENODEV;
+ goto err_out_cleanup;
+ }
+
+ /*
+ * Init RQ/WQ resources.
+ *
+ * RQ[0 to n-1] point to CQ[0 to n-1]
+ * WQ[0 to m-1] point to CQ[n to n+m-1]
+ * WQ_COPY[0 to k-1] points to CQ[n+m to n+m+k-1]
+ *
+ * Note for copy wq we always initialize with cq_index = 0
+ *
+ * Error interrupt is not enabled for MSI.
+ */
+
+ switch (intr_mode) {
+ case VNIC_DEV_INTR_MODE_INTX:
+ case VNIC_DEV_INTR_MODE_MSIX:
+ error_interrupt_enable = 1;
+ error_interrupt_offset = fnic->err_intr_offset;
+ break;
+ default:
+ error_interrupt_enable = 0;
+ error_interrupt_offset = 0;
+ break;
+ }
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ cq_index = i;
+ vnic_rq_init(&fnic->rq[i],
+ cq_index,
+ error_interrupt_enable,
+ error_interrupt_offset);
+ }
+
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ cq_index = i + fnic->rq_count;
+ vnic_wq_init(&fnic->wq[i],
+ cq_index,
+ error_interrupt_enable,
+ error_interrupt_offset);
+ }
+
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ vnic_wq_copy_init(&fnic->wq_copy[i],
+ 0 /* cq_index 0 - always */,
+ error_interrupt_enable,
+ error_interrupt_offset);
+ }
+
+ for (i = 0; i < fnic->cq_count; i++) {
+
+ switch (intr_mode) {
+ case VNIC_DEV_INTR_MODE_MSIX:
+ interrupt_offset = i;
+ break;
+ default:
+ interrupt_offset = 0;
+ break;
+ }
+
+ vnic_cq_init(&fnic->cq[i],
+ 0 /* flow_control_enable */,
+ 1 /* color_enable */,
+ 0 /* cq_head */,
+ 0 /* cq_tail */,
+ 1 /* cq_tail_color */,
+ 1 /* interrupt_enable */,
+ 1 /* cq_entry_enable */,
+ 0 /* cq_message_enable */,
+ interrupt_offset,
+ 0 /* cq_message_addr */);
+ }
+
+ /*
+ * Init INTR resources
+ *
+ * mask_on_assertion is not used for INTx due to the level-
+ * triggered nature of INTx
+ */
+
+ switch (intr_mode) {
+ case VNIC_DEV_INTR_MODE_MSI:
+ case VNIC_DEV_INTR_MODE_MSIX:
+ mask_on_assertion = 1;
+ break;
+ default:
+ mask_on_assertion = 0;
+ break;
+ }
+
+ for (i = 0; i < fnic->intr_count; i++) {
+ vnic_intr_init(&fnic->intr[i],
+ fnic->config.intr_timer,
+ fnic->config.intr_timer_type,
+ mask_on_assertion);
+ }
+
+ /* init the stats memory by making the first call here */
+ err = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
+ if (err) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "vnic_dev_stats_dump failed - x%x\n", err);
+ goto err_out_cleanup;
+ }
+
+ /* Clear LIF stats */
+ vnic_dev_stats_clear(fnic->vdev);
+
+ return 0;
+
+err_out_cleanup:
+ fnic_free_vnic_resources(fnic);
+
+ return err;
+}
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FNIC_RES_H_
+#define _FNIC_RES_H_
+
+#include "wq_enet_desc.h"
+#include "rq_enet_desc.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "fnic_io.h"
+#include "fcpio.h"
+#include "vnic_wq_copy.h"
+#include "vnic_cq_copy.h"
+
+static inline void fnic_queue_wq_desc(struct vnic_wq *wq,
+ void *os_buf, dma_addr_t dma_addr,
+ unsigned int len, unsigned int fc_eof,
+ int vlan_tag_insert,
+ unsigned int vlan_tag,
+ int cq_entry, int sop, int eop)
+{
+ struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
+
+ wq_enet_desc_enc(desc,
+ (u64)dma_addr | VNIC_PADDR_TARGET,
+ (u16)len,
+ 0, /* mss_or_csum_offset */
+ (u16)fc_eof,
+ 0, /* offload_mode */
+ (u8)eop, (u8)cq_entry,
+ 1, /* fcoe_encap */
+ (u8)vlan_tag_insert,
+ (u16)vlan_tag,
+ 0 /* loopback */);
+
+ vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop);
+}
+
+static inline void fnic_queue_wq_copy_desc_icmnd_16(struct vnic_wq_copy *wq,
+ u32 req_id,
+ u32 lunmap_id, u8 spl_flags,
+ u32 sgl_cnt, u32 sense_len,
+ u64 sgl_addr, u64 sns_addr,
+ u8 crn, u8 pri_ta,
+ u8 flags, u8 *scsi_cdb,
+ u32 data_len, u8 *lun,
+ u32 d_id, u16 mss,
+ u32 ratov, u32 edtov)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_ICMND_16; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ desc->u.icmnd_16.lunmap_id = lunmap_id; /* index into lunmap table */
+ desc->u.icmnd_16.special_req_flags = spl_flags; /* exch req flags */
+ desc->u.icmnd_16._resvd0[0] = 0; /* reserved */
+ desc->u.icmnd_16._resvd0[1] = 0; /* reserved */
+ desc->u.icmnd_16._resvd0[2] = 0; /* reserved */
+ desc->u.icmnd_16.sgl_cnt = sgl_cnt; /* scatter-gather list count */
+ desc->u.icmnd_16.sense_len = sense_len; /* sense buffer length */
+ desc->u.icmnd_16.sgl_addr = sgl_addr; /* scatter-gather list addr */
+ desc->u.icmnd_16.sense_addr = sns_addr; /* sense buffer address */
+ desc->u.icmnd_16.crn = crn; /* SCSI Command Reference No.*/
+ desc->u.icmnd_16.pri_ta = pri_ta; /* SCSI Pri & Task attribute */
+ desc->u.icmnd_16._resvd1 = 0; /* reserved: should be 0 */
+ desc->u.icmnd_16.flags = flags; /* command flags */
+ memcpy(desc->u.icmnd_16.scsi_cdb, scsi_cdb, CDB_16); /* SCSI CDB */
+ desc->u.icmnd_16.data_len = data_len; /* length of data expected */
+ memcpy(desc->u.icmnd_16.lun, lun, LUN_ADDRESS); /* LUN address */
+ desc->u.icmnd_16._resvd2 = 0; /* reserved */
+ hton24(desc->u.icmnd_16.d_id, d_id); /* FC vNIC only: Target D_ID */
+ desc->u.icmnd_16.mss = mss; /* FC vNIC only: max burst */
+ desc->u.icmnd_16.r_a_tov = ratov; /*FC vNIC only: Res. Alloc Timeout */
+ desc->u.icmnd_16.e_d_tov = edtov; /*FC vNIC only: Err Detect Timeout */
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_wq_copy_desc_itmf(struct vnic_wq_copy *wq,
+ u32 req_id, u32 lunmap_id,
+ u32 tm_req, u32 tm_id, u8 *lun,
+ u32 d_id, u32 r_a_tov,
+ u32 e_d_tov)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_ITMF; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ desc->u.itmf.lunmap_id = lunmap_id; /* index into lunmap table */
+ desc->u.itmf.tm_req = tm_req; /* SCSI Task Management request */
+ desc->u.itmf.t_tag = tm_id; /* tag of fcpio to be aborted */
+ desc->u.itmf._resvd = 0;
+ memcpy(desc->u.itmf.lun, lun, LUN_ADDRESS); /* LUN address */
+ desc->u.itmf._resvd1 = 0;
+ hton24(desc->u.itmf.d_id, d_id); /* FC vNIC only: Target D_ID */
+ desc->u.itmf.r_a_tov = r_a_tov; /* FC vNIC only: R_A_TOV in msec */
+ desc->u.itmf.e_d_tov = e_d_tov; /* FC vNIC only: E_D_TOV in msec */
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_wq_copy_desc_flogi_reg(struct vnic_wq_copy *wq,
+ u32 req_id, u8 format,
+ u32 s_id, u8 *gw_mac)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_FLOGI_REG; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ desc->u.flogi_reg.format = format;
+ hton24(desc->u.flogi_reg.s_id, s_id);
+ memcpy(desc->u.flogi_reg.gateway_mac, gw_mac, ETH_ALEN);
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_wq_copy_desc_fw_reset(struct vnic_wq_copy *wq,
+ u32 req_id)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_RESET; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_wq_copy_desc_lunmap(struct vnic_wq_copy *wq,
+ u32 req_id, u64 lunmap_addr,
+ u32 lunmap_len)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_LUNMAP_REQ; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ desc->u.lunmap_req.addr = lunmap_addr; /* address of the buffer */
+ desc->u.lunmap_req.len = lunmap_len; /* len of the buffer */
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_rq_desc(struct vnic_rq *rq,
+ void *os_buf, dma_addr_t dma_addr,
+ u16 len)
+{
+ struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
+
+ rq_enet_desc_enc(desc,
+ (u64)dma_addr | VNIC_PADDR_TARGET,
+ RQ_ENET_TYPE_ONLY_SOP,
+ (u16)len);
+
+ vnic_rq_post(rq, os_buf, 0, dma_addr, len);
+}
+
+
+struct fnic;
+
+int fnic_get_vnic_config(struct fnic *);
+int fnic_alloc_vnic_resources(struct fnic *);
+void fnic_free_vnic_resources(struct fnic *);
+void fnic_get_res_counts(struct fnic *);
+int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
+ u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu,
+ u8 rss_enable, u8 tso_ipid_split_en,
+ u8 ig_vlan_strip_en);
+
+#endif /* _FNIC_RES_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/mempool.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+#include <linux/scatterlist.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/delay.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fcoe.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+#include "fnic_io.h"
+#include "fnic.h"
+
+const char *fnic_state_str[] = {
+ [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
+ [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
+ [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
+ [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
+};
+
+static const char *fnic_ioreq_state_str[] = {
+ [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
+ [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
+ [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
+ [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
+};
+
+static const char *fcpio_status_str[] = {
+ [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
+ [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
+ [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
+ [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
+ [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
+ [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
+ [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
+ [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
+ [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
+ [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
+ [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
+ [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
+ [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
+ [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
+ [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
+ [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
+ [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
+ [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
+ [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
+};
+
+const char *fnic_state_to_str(unsigned int state)
+{
+ if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
+ return "unknown";
+
+ return fnic_state_str[state];
+}
+
+static const char *fnic_ioreq_state_to_str(unsigned int state)
+{
+ if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
+ !fnic_ioreq_state_str[state])
+ return "unknown";
+
+ return fnic_ioreq_state_str[state];
+}
+
+static const char *fnic_fcpio_status_to_str(unsigned int status)
+{
+ if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
+ return "unknown";
+
+ return fcpio_status_str[status];
+}
+
+static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
+
+static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
+ struct scsi_cmnd *sc)
+{
+ u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
+
+ return &fnic->io_req_lock[hash];
+}
+
+/*
+ * Unmap the data buffer and sense buffer for an io_req,
+ * also unmap and free the device-private scatter/gather list.
+ */
+static void fnic_release_ioreq_buf(struct fnic *fnic,
+ struct fnic_io_req *io_req,
+ struct scsi_cmnd *sc)
+{
+ if (io_req->sgl_list_pa)
+ pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
+ sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
+ PCI_DMA_TODEVICE);
+ scsi_dma_unmap(sc);
+
+ if (io_req->sgl_cnt)
+ mempool_free(io_req->sgl_list_alloc,
+ fnic->io_sgl_pool[io_req->sgl_type]);
+ if (io_req->sense_buf_pa)
+ pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
+ SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
+}
+
+/* Free up Copy Wq descriptors. Called with copy_wq lock held */
+static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
+{
+ /* if no Ack received from firmware, then nothing to clean */
+ if (!fnic->fw_ack_recd[0])
+ return 1;
+
+ /*
+ * Update desc_available count based on number of freed descriptors
+ * Account for wraparound
+ */
+ if (wq->to_clean_index <= fnic->fw_ack_index[0])
+ wq->ring.desc_avail += (fnic->fw_ack_index[0]
+ - wq->to_clean_index + 1);
+ else
+ wq->ring.desc_avail += (wq->ring.desc_count
+ - wq->to_clean_index
+ + fnic->fw_ack_index[0] + 1);
+
+ /*
+ * just bump clean index to ack_index+1 accounting for wraparound
+ * this will essentially free up all descriptors between
+ * to_clean_index and fw_ack_index, both inclusive
+ */
+ wq->to_clean_index =
+ (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
+
+ /* we have processed the acks received so far */
+ fnic->fw_ack_recd[0] = 0;
+ return 0;
+}
+
+
+/*
+ * fnic_fw_reset_handler
+ * Routine to send reset msg to fw
+ */
+int fnic_fw_reset_handler(struct fnic *fnic)
+{
+ struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ int ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (!vnic_wq_copy_desc_avail(wq))
+ ret = -EAGAIN;
+ else
+ fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
+
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+
+ if (!ret)
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Issued fw reset\n");
+ else
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Failed to issue fw reset\n");
+ return ret;
+}
+
+
+/*
+ * fnic_flogi_reg_handler
+ * Routine to send flogi register msg to fw
+ */
+int fnic_flogi_reg_handler(struct fnic *fnic)
+{
+ struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ u8 gw_mac[ETH_ALEN];
+ int ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (!vnic_wq_copy_desc_avail(wq)) {
+ ret = -EAGAIN;
+ goto flogi_reg_ioreq_end;
+ }
+
+ if (fnic->fcoui_mode)
+ memset(gw_mac, 0xff, ETH_ALEN);
+ else
+ memcpy(gw_mac, fnic->dest_addr, ETH_ALEN);
+
+ fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
+ FCPIO_FLOGI_REG_GW_DEST,
+ fnic->s_id,
+ gw_mac);
+
+flogi_reg_ioreq_end:
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+
+ if (!ret)
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "flog reg issued\n");
+
+ return ret;
+}
+
+/*
+ * fnic_queue_wq_copy_desc
+ * Routine to enqueue a wq copy desc
+ */
+static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
+ struct vnic_wq_copy *wq,
+ struct fnic_io_req *io_req,
+ struct scsi_cmnd *sc,
+ u32 sg_count)
+{
+ struct scatterlist *sg;
+ struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
+ struct fc_rport_libfc_priv *rp = rport->dd_data;
+ struct host_sg_desc *desc;
+ u8 pri_tag = 0;
+ unsigned int i;
+ unsigned long intr_flags;
+ int flags;
+ u8 exch_flags;
+ struct scsi_lun fc_lun;
+ char msg[2];
+
+ if (sg_count) {
+ BUG_ON(sg_count < 0);
+ BUG_ON(sg_count > FNIC_MAX_SG_DESC_CNT);
+
+ /* For each SGE, create a device desc entry */
+ desc = io_req->sgl_list;
+ for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
+ desc->addr = cpu_to_le64(sg_dma_address(sg));
+ desc->len = cpu_to_le32(sg_dma_len(sg));
+ desc->_resvd = 0;
+ desc++;
+ }
+
+ io_req->sgl_list_pa = pci_map_single
+ (fnic->pdev,
+ io_req->sgl_list,
+ sizeof(io_req->sgl_list[0]) * sg_count,
+ PCI_DMA_TODEVICE);
+ }
+
+ io_req->sense_buf_pa = pci_map_single(fnic->pdev,
+ sc->sense_buffer,
+ SCSI_SENSE_BUFFERSIZE,
+ PCI_DMA_FROMDEVICE);
+
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ pri_tag = FCPIO_ICMND_PTA_SIMPLE;
+ msg[0] = MSG_SIMPLE_TAG;
+ scsi_populate_tag_msg(sc, msg);
+ if (msg[0] == MSG_ORDERED_TAG)
+ pri_tag = FCPIO_ICMND_PTA_ORDERED;
+
+ /* Enqueue the descriptor in the Copy WQ */
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+
+ flags = 0;
+ if (sc->sc_data_direction == DMA_FROM_DEVICE)
+ flags = FCPIO_ICMND_RDDATA;
+ else if (sc->sc_data_direction == DMA_TO_DEVICE)
+ flags = FCPIO_ICMND_WRDATA;
+
+ exch_flags = 0;
+ if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
+ (rp->flags & FC_RP_FLAGS_RETRY))
+ exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
+
+ fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
+ 0, exch_flags, io_req->sgl_cnt,
+ SCSI_SENSE_BUFFERSIZE,
+ io_req->sgl_list_pa,
+ io_req->sense_buf_pa,
+ 0, /* scsi cmd ref, always 0 */
+ pri_tag, /* scsi pri and tag */
+ flags, /* command flags */
+ sc->cmnd, scsi_bufflen(sc),
+ fc_lun.scsi_lun, io_req->port_id,
+ rport->maxframe_size, rp->r_a_tov,
+ rp->e_d_tov);
+
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+ return 0;
+}
+
+/*
+ * fnic_queuecommand
+ * Routine to send a scsi cdb
+ * Called with host_lock held and interrupts disabled.
+ */
+int fnic_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
+{
+ struct fc_lport *lp;
+ struct fc_rport *rport;
+ struct fnic_io_req *io_req;
+ struct fnic *fnic;
+ struct vnic_wq_copy *wq;
+ int ret;
+ u32 sg_count;
+ unsigned long flags;
+ unsigned long ptr;
+
+ rport = starget_to_rport(scsi_target(sc->device));
+ ret = fc_remote_port_chkready(rport);
+ if (ret) {
+ sc->result = ret;
+ done(sc);
+ return 0;
+ }
+
+ lp = shost_priv(sc->device->host);
+ if (lp->state != LPORT_ST_READY || !(lp->link_up))
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ /*
+ * Release host lock, use driver resource specific locks from here.
+ * Don't re-enable interrupts in case they were disabled prior to the
+ * caller disabling them.
+ */
+ spin_unlock(lp->host->host_lock);
+
+ /* Get a new io_req for this SCSI IO */
+ fnic = lport_priv(lp);
+
+ io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
+ if (!io_req) {
+ ret = SCSI_MLQUEUE_HOST_BUSY;
+ goto out;
+ }
+ memset(io_req, 0, sizeof(*io_req));
+
+ /* Map the data buffer */
+ sg_count = scsi_dma_map(sc);
+ if (sg_count < 0) {
+ mempool_free(io_req, fnic->io_req_pool);
+ goto out;
+ }
+
+ /* Determine the type of scatter/gather list we need */
+ io_req->sgl_cnt = sg_count;
+ io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
+ if (sg_count > FNIC_DFLT_SG_DESC_CNT)
+ io_req->sgl_type = FNIC_SGL_CACHE_MAX;
+
+ if (sg_count) {
+ io_req->sgl_list =
+ mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
+ GFP_ATOMIC | GFP_DMA);
+ if (!io_req->sgl_list) {
+ ret = SCSI_MLQUEUE_HOST_BUSY;
+ scsi_dma_unmap(sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ goto out;
+ }
+
+ /* Cache sgl list allocated address before alignment */
+ io_req->sgl_list_alloc = io_req->sgl_list;
+ ptr = (unsigned long) io_req->sgl_list;
+ if (ptr % FNIC_SG_DESC_ALIGN) {
+ io_req->sgl_list = (struct host_sg_desc *)
+ (((unsigned long) ptr
+ + FNIC_SG_DESC_ALIGN - 1)
+ & ~(FNIC_SG_DESC_ALIGN - 1));
+ }
+ }
+
+ /* initialize rest of io_req */
+ io_req->port_id = rport->port_id;
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
+ CMD_SP(sc) = (char *)io_req;
+ sc->scsi_done = done;
+
+ /* create copy wq desc and enqueue it */
+ wq = &fnic->wq_copy[0];
+ ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
+ if (ret) {
+ /*
+ * In case another thread cancelled the request,
+ * refetch the pointer under the lock.
+ */
+ spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
+
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ CMD_SP(sc) = NULL;
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
+ spin_unlock_irqrestore(io_lock, flags);
+ if (io_req) {
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ }
+ }
+out:
+ /* acquire host lock before returning to SCSI */
+ spin_lock(lp->host->host_lock);
+ return ret;
+}
+
+/*
+ * fnic_fcpio_fw_reset_cmpl_handler
+ * Routine to handle fw reset completion
+ */
+static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
+ struct fcpio_fw_req *desc)
+{
+ u8 type;
+ u8 hdr_status;
+ struct fcpio_tag tag;
+ int ret = 0;
+ struct fc_frame *flogi;
+ unsigned long flags;
+
+ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+
+ /* Clean up all outstanding io requests */
+ fnic_cleanup_io(fnic, SCSI_NO_TAG);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ flogi = fnic->flogi;
+ fnic->flogi = NULL;
+
+ /* fnic should be in FC_TRANS_ETH_MODE */
+ if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
+ /* Check status of reset completion */
+ if (!hdr_status) {
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "reset cmpl success\n");
+ /* Ready to send flogi out */
+ fnic->state = FNIC_IN_ETH_MODE;
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "fnic fw_reset : failed %s\n",
+ fnic_fcpio_status_to_str(hdr_status));
+
+ /*
+ * Unable to change to eth mode, cannot send out flogi
+ * Change state to fc mode, so that subsequent Flogi
+ * requests from libFC will cause more attempts to
+ * reset the firmware. Free the cached flogi
+ */
+ fnic->state = FNIC_IN_FC_MODE;
+ ret = -1;
+ }
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "Unexpected state %s while processing"
+ " reset cmpl\n", fnic_state_to_str(fnic->state));
+ ret = -1;
+ }
+
+ /* Thread removing device blocks till firmware reset is complete */
+ if (fnic->remove_wait)
+ complete(fnic->remove_wait);
+
+ /*
+ * If fnic is being removed, or fw reset failed
+ * free the flogi frame. Else, send it out
+ */
+ if (fnic->remove_wait || ret) {
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ if (flogi)
+ dev_kfree_skb_irq(fp_skb(flogi));
+ goto reset_cmpl_handler_end;
+ }
+
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (flogi)
+ ret = fnic_send_frame(fnic, flogi);
+
+ reset_cmpl_handler_end:
+ return ret;
+}
+
+/*
+ * fnic_fcpio_flogi_reg_cmpl_handler
+ * Routine to handle flogi register completion
+ */
+static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
+ struct fcpio_fw_req *desc)
+{
+ u8 type;
+ u8 hdr_status;
+ struct fcpio_tag tag;
+ int ret = 0;
+ struct fc_frame *flogi_resp = NULL;
+ unsigned long flags;
+ struct sk_buff *skb;
+
+ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+
+ /* Update fnic state based on status of flogi reg completion */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+
+ if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
+
+ /* Check flogi registration completion status */
+ if (!hdr_status) {
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "flog reg succeeded\n");
+ fnic->state = FNIC_IN_FC_MODE;
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "fnic flogi reg :failed %s\n",
+ fnic_fcpio_status_to_str(hdr_status));
+ fnic->state = FNIC_IN_ETH_MODE;
+ ret = -1;
+ }
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Unexpected fnic state %s while"
+ " processing flogi reg completion\n",
+ fnic_state_to_str(fnic->state));
+ ret = -1;
+ }
+
+ /* Successful flogi reg cmpl, pass frame to LibFC */
+ if (!ret && flogi_resp) {
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ goto reg_cmpl_handler_end;
+ }
+ skb = (struct sk_buff *)flogi_resp;
+ /* Use fr_flags to indicate whether flogi resp or not */
+ fr_flags(flogi_resp) = 1;
+ fr_dev(flogi_resp) = fnic->lport;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ skb_queue_tail(&fnic->frame_queue, skb);
+ queue_work(fnic_event_queue, &fnic->frame_work);
+
+ } else {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ if (flogi_resp)
+ dev_kfree_skb_irq(fp_skb(flogi_resp));
+ }
+
+reg_cmpl_handler_end:
+ return ret;
+}
+
+static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
+ u16 request_out)
+{
+ if (wq->to_clean_index <= wq->to_use_index) {
+ /* out of range, stale request_out index */
+ if (request_out < wq->to_clean_index ||
+ request_out >= wq->to_use_index)
+ return 0;
+ } else {
+ /* out of range, stale request_out index */
+ if (request_out < wq->to_clean_index &&
+ request_out >= wq->to_use_index)
+ return 0;
+ }
+ /* request_out index is in range */
+ return 1;
+}
+
+
+/*
+ * Mark that ack received and store the Ack index. If there are multiple
+ * acks received before Tx thread cleans it up, the latest value will be
+ * used which is correct behavior. This state should be in the copy Wq
+ * instead of in the fnic
+ */
+static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
+ unsigned int cq_index,
+ struct fcpio_fw_req *desc)
+{
+ struct vnic_wq_copy *wq;
+ u16 request_out = desc->u.ack.request_out;
+ unsigned long flags;
+
+ /* mark the ack state */
+ wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+ if (is_ack_index_in_range(wq, request_out)) {
+ fnic->fw_ack_index[0] = request_out;
+ fnic->fw_ack_recd[0] = 1;
+ }
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+}
+
+/*
+ * fnic_fcpio_icmnd_cmpl_handler
+ * Routine to handle icmnd completions
+ */
+static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
+ struct fcpio_fw_req *desc)
+{
+ u8 type;
+ u8 hdr_status;
+ struct fcpio_tag tag;
+ u32 id;
+ u64 xfer_len = 0;
+ struct fcpio_icmnd_cmpl *icmnd_cmpl;
+ struct fnic_io_req *io_req;
+ struct scsi_cmnd *sc;
+ unsigned long flags;
+ spinlock_t *io_lock;
+
+ /* Decode the cmpl description to get the io_req id */
+ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+ fcpio_tag_id_dec(&tag, &id);
+
+ if (id >= FNIC_MAX_IO_REQ)
+ return;
+
+ sc = scsi_host_find_tag(fnic->lport->host, id);
+ WARN_ON_ONCE(!sc);
+ if (!sc)
+ return;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ WARN_ON_ONCE(!io_req);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ return;
+ }
+
+ /* firmware completed the io */
+ io_req->io_completed = 1;
+
+ /*
+ * if SCSI-ML has already issued abort on this command,
+ * ignore completion of the IO. The abts path will clean it up
+ */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ return;
+ }
+
+ /* Mark the IO as complete */
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
+
+ icmnd_cmpl = &desc->u.icmnd_cmpl;
+
+ switch (hdr_status) {
+ case FCPIO_SUCCESS:
+ sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
+ xfer_len = scsi_bufflen(sc);
+ scsi_set_resid(sc, icmnd_cmpl->residual);
+
+ if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
+ xfer_len -= icmnd_cmpl->residual;
+
+ /*
+ * If queue_full, then try to reduce queue depth for all
+ * LUNS on the target. Todo: this should be accompanied
+ * by a periodic queue_depth rampup based on successful
+ * IO completion.
+ */
+ if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
+ struct scsi_device *t_sdev;
+ int qd = 0;
+
+ shost_for_each_device(t_sdev, sc->device->host) {
+ if (t_sdev->id != sc->device->id)
+ continue;
+
+ if (t_sdev->queue_depth > 1) {
+ qd = scsi_track_queue_full
+ (t_sdev,
+ t_sdev->queue_depth - 1);
+ if (qd == -1)
+ qd = t_sdev->host->cmd_per_lun;
+ shost_printk(KERN_INFO,
+ fnic->lport->host,
+ "scsi[%d:%d:%d:%d"
+ "] queue full detected,"
+ "new depth = %d\n",
+ t_sdev->host->host_no,
+ t_sdev->channel,
+ t_sdev->id, t_sdev->lun,
+ t_sdev->queue_depth);
+ }
+ }
+ }
+ break;
+
+ case FCPIO_TIMEOUT: /* request was timed out */
+ sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
+ break;
+
+ case FCPIO_ABORTED: /* request was aborted */
+ sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+ break;
+
+ case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
+ scsi_set_resid(sc, icmnd_cmpl->residual);
+ sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+ break;
+
+ case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
+ sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
+ break;
+ case FCPIO_INVALID_HEADER: /* header contains invalid data */
+ case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
+ case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
+ case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
+ case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
+ case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
+ case FCPIO_FW_ERR: /* request was terminated due fw error */
+ default:
+ shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
+ fnic_fcpio_status_to_str(hdr_status));
+ sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+ break;
+ }
+
+ /* Break link with the SCSI command */
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+
+ mempool_free(io_req, fnic->io_req_pool);
+
+ if (sc->sc_data_direction == DMA_FROM_DEVICE) {
+ fnic->lport->host_stats.fcp_input_requests++;
+ fnic->fcp_input_bytes += xfer_len;
+ } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
+ fnic->lport->host_stats.fcp_output_requests++;
+ fnic->fcp_output_bytes += xfer_len;
+ } else
+ fnic->lport->host_stats.fcp_control_requests++;
+
+ /* Call SCSI completion function to complete the IO */
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+
+}
+
+/* fnic_fcpio_itmf_cmpl_handler
+ * Routine to handle itmf completions
+ */
+static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
+ struct fcpio_fw_req *desc)
+{
+ u8 type;
+ u8 hdr_status;
+ struct fcpio_tag tag;
+ u32 id;
+ struct scsi_cmnd *sc;
+ struct fnic_io_req *io_req;
+ unsigned long flags;
+ spinlock_t *io_lock;
+
+ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+ fcpio_tag_id_dec(&tag, &id);
+
+ if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ)
+ return;
+
+ sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
+ WARN_ON_ONCE(!sc);
+ if (!sc)
+ return;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ WARN_ON_ONCE(!io_req);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ return;
+ }
+
+ if (id & FNIC_TAG_ABORT) {
+ /* Completion of abort cmd */
+ if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
+ /* This is a late completion. Ignore it */
+ spin_unlock_irqrestore(io_lock, flags);
+ return;
+ }
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
+ CMD_ABTS_STATUS(sc) = hdr_status;
+
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "abts cmpl recd. id %d status %s\n",
+ (int)(id & FNIC_TAG_MASK),
+ fnic_fcpio_status_to_str(hdr_status));
+
+ /*
+ * If scsi_eh thread is blocked waiting for abts to complete,
+ * signal completion to it. IO will be cleaned in the thread
+ * else clean it in this context
+ */
+ if (io_req->abts_done) {
+ complete(io_req->abts_done);
+ spin_unlock_irqrestore(io_lock, flags);
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "abts cmpl, completing IO\n");
+ CMD_SP(sc) = NULL;
+ sc->result = (DID_ERROR << 16);
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+ }
+
+ } else if (id & FNIC_TAG_DEV_RST) {
+ /* Completion of device reset */
+ CMD_LR_STATUS(sc) = hdr_status;
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "dev reset cmpl recd. id %d status %s\n",
+ (int)(id & FNIC_TAG_MASK),
+ fnic_fcpio_status_to_str(hdr_status));
+ if (io_req->dr_done)
+ complete(io_req->dr_done);
+ spin_unlock_irqrestore(io_lock, flags);
+
+ } else {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Unexpected itmf io state %s tag %x\n",
+ fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
+ spin_unlock_irqrestore(io_lock, flags);
+ }
+
+}
+
+/*
+ * fnic_fcpio_cmpl_handler
+ * Routine to service the cq for wq_copy
+ */
+static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
+ unsigned int cq_index,
+ struct fcpio_fw_req *desc)
+{
+ struct fnic *fnic = vnic_dev_priv(vdev);
+ int ret = 0;
+
+ switch (desc->hdr.type) {
+ case FCPIO_ACK: /* fw copied copy wq desc to its queue */
+ fnic_fcpio_ack_handler(fnic, cq_index, desc);
+ break;
+
+ case FCPIO_ICMND_CMPL: /* fw completed a command */
+ fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
+ break;
+
+ case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
+ fnic_fcpio_itmf_cmpl_handler(fnic, desc);
+ break;
+
+ case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
+ ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
+ break;
+
+ case FCPIO_RESET_CMPL: /* fw completed reset */
+ ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
+ break;
+
+ default:
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "firmware completion type %d\n",
+ desc->hdr.type);
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * fnic_wq_copy_cmpl_handler
+ * Routine to process wq copy
+ */
+int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
+{
+ unsigned int wq_work_done = 0;
+ unsigned int i, cq_index;
+ unsigned int cur_work_done;
+
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ cq_index = i + fnic->raw_wq_count + fnic->rq_count;
+ cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
+ fnic_fcpio_cmpl_handler,
+ copy_work_to_do);
+ wq_work_done += cur_work_done;
+ }
+ return wq_work_done;
+}
+
+static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
+{
+ unsigned int i;
+ struct fnic_io_req *io_req;
+ unsigned long flags = 0;
+ struct scsi_cmnd *sc;
+ spinlock_t *io_lock;
+
+ for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
+ if (i == exclude_id)
+ continue;
+
+ sc = scsi_host_find_tag(fnic->lport->host, i);
+ if (!sc)
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto cleanup_scsi_cmd;
+ }
+
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /*
+ * If there is a scsi_cmnd associated with this io_req, then
+ * free the corresponding state
+ */
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+
+cleanup_scsi_cmd:
+ sc->result = DID_TRANSPORT_DISRUPTED << 16;
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:"
+ " DID_TRANSPORT_DISRUPTED\n");
+
+ /* Complete the command to SCSI */
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+ }
+}
+
+void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *desc)
+{
+ u32 id;
+ struct fnic *fnic = vnic_dev_priv(wq->vdev);
+ struct fnic_io_req *io_req;
+ struct scsi_cmnd *sc;
+ unsigned long flags;
+ spinlock_t *io_lock;
+
+ /* get the tag reference */
+ fcpio_tag_id_dec(&desc->hdr.tag, &id);
+ id &= FNIC_TAG_MASK;
+
+ if (id >= FNIC_MAX_IO_REQ)
+ return;
+
+ sc = scsi_host_find_tag(fnic->lport->host, id);
+ if (!sc)
+ return;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ /* Get the IO context which this desc refers to */
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ /* fnic interrupts are turned off by now */
+
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto wq_copy_cleanup_scsi_cmd;
+ }
+
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+
+wq_copy_cleanup_scsi_cmd:
+ sc->result = DID_NO_CONNECT << 16;
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
+ " DID_NO_CONNECT\n");
+
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+}
+
+static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
+ u32 task_req, u8 *fc_lun,
+ struct fnic_io_req *io_req)
+{
+ struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (!vnic_wq_copy_desc_avail(wq)) {
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+ return 1;
+ }
+ fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
+ 0, task_req, tag, fc_lun, io_req->port_id,
+ fnic->config.ra_tov, fnic->config.ed_tov);
+
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+ return 0;
+}
+
+void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
+{
+ int tag;
+ struct fnic_io_req *io_req;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ struct scsi_cmnd *sc;
+ struct scsi_lun fc_lun;
+ enum fnic_ioreq_state old_ioreq_state;
+
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "fnic_rport_reset_exch called portid 0x%06x\n",
+ port_id);
+
+ if (fnic->in_remove)
+ return;
+
+ for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ sc = scsi_host_find_tag(fnic->lport->host, tag);
+ if (!sc)
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ if (!io_req || io_req->port_id != port_id) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+
+ /*
+ * Found IO that is still pending with firmware and
+ * belongs to rport that went away
+ */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+ old_ioreq_state = CMD_STATE(sc);
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
+ CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+
+ BUG_ON(io_req->abts_done);
+
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic_rport_reset_exch: Issuing abts\n");
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* Now queue the abort command to firmware */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ if (fnic_queue_abort_io_req(fnic, tag,
+ FCPIO_ITMF_ABT_TASK_TERM,
+ fc_lun.scsi_lun, io_req)) {
+ /*
+ * Revert the cmd state back to old state, if
+ * it hasnt changed in between. This cmd will get
+ * aborted later by scsi_eh, or cleaned up during
+ * lun reset
+ */
+ io_lock = fnic_io_lock_hash(fnic, sc);
+
+ spin_lock_irqsave(io_lock, flags);
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
+ CMD_STATE(sc) = old_ioreq_state;
+ spin_unlock_irqrestore(io_lock, flags);
+ }
+ }
+
+}
+
+void fnic_terminate_rport_io(struct fc_rport *rport)
+{
+ int tag;
+ struct fnic_io_req *io_req;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ struct scsi_cmnd *sc;
+ struct scsi_lun fc_lun;
+ struct fc_rport_libfc_priv *rdata = rport->dd_data;
+ struct fc_lport *lport = rdata->local_port;
+ struct fnic *fnic = lport_priv(lport);
+ struct fc_rport *cmd_rport;
+ enum fnic_ioreq_state old_ioreq_state;
+
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host, "fnic_terminate_rport_io called"
+ " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n",
+ rport->port_name, rport->node_name,
+ rport->port_id);
+
+ if (fnic->in_remove)
+ return;
+
+ for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ sc = scsi_host_find_tag(fnic->lport->host, tag);
+ if (!sc)
+ continue;
+
+ cmd_rport = starget_to_rport(scsi_target(sc->device));
+ if (rport != cmd_rport)
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ if (!io_req || rport != cmd_rport) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+
+ /*
+ * Found IO that is still pending with firmware and
+ * belongs to rport that went away
+ */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+ old_ioreq_state = CMD_STATE(sc);
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
+ CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+
+ BUG_ON(io_req->abts_done);
+
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "fnic_terminate_rport_io: Issuing abts\n");
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* Now queue the abort command to firmware */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ if (fnic_queue_abort_io_req(fnic, tag,
+ FCPIO_ITMF_ABT_TASK_TERM,
+ fc_lun.scsi_lun, io_req)) {
+ /*
+ * Revert the cmd state back to old state, if
+ * it hasnt changed in between. This cmd will get
+ * aborted later by scsi_eh, or cleaned up during
+ * lun reset
+ */
+ io_lock = fnic_io_lock_hash(fnic, sc);
+
+ spin_lock_irqsave(io_lock, flags);
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
+ CMD_STATE(sc) = old_ioreq_state;
+ spin_unlock_irqrestore(io_lock, flags);
+ }
+ }
+
+}
+
+static void fnic_block_error_handler(struct scsi_cmnd *sc)
+{
+ struct Scsi_Host *shost = sc->device->host;
+ struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ while (rport->port_state == FC_PORTSTATE_BLOCKED) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ msleep(1000);
+ spin_lock_irqsave(shost->host_lock, flags);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+}
+
+/*
+ * This function is exported to SCSI for sending abort cmnds.
+ * A SCSI IO is represented by a io_req in the driver.
+ * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
+ */
+int fnic_abort_cmd(struct scsi_cmnd *sc)
+{
+ struct fc_lport *lp;
+ struct fnic *fnic;
+ struct fnic_io_req *io_req;
+ struct fc_rport *rport;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ int ret = SUCCESS;
+ u32 task_req;
+ struct scsi_lun fc_lun;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+
+ /* Wait for rport to unblock */
+ fnic_block_error_handler(sc);
+
+ /* Get local-port, check ready and link up */
+ lp = shost_priv(sc->device->host);
+
+ fnic = lport_priv(lp);
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n",
+ (starget_to_rport(scsi_target(sc->device)))->port_id,
+ sc->device->lun, sc->request->tag);
+
+ if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
+ ret = FAILED;
+ goto fnic_abort_cmd_end;
+ }
+
+ /*
+ * Avoid a race between SCSI issuing the abort and the device
+ * completing the command.
+ *
+ * If the command is already completed by the fw cmpl code,
+ * we just return SUCCESS from here. This means that the abort
+ * succeeded. In the SCSI ML, since the timeout for command has
+ * happened, the completion wont actually complete the command
+ * and it will be considered as an aborted command
+ *
+ * The CMD_SP will not be cleared except while holding io_req_lock.
+ */
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto fnic_abort_cmd_end;
+ }
+
+ io_req->abts_done = &tm_done;
+
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto wait_pending;
+ }
+ /*
+ * Command is still pending, need to abort it
+ * If the firmware completes the command after this point,
+ * the completion wont be done till mid-layer, since abort
+ * has already started.
+ */
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
+ CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /*
+ * Check readiness of the remote port. If the path to remote
+ * port is up, then send abts to the remote port to terminate
+ * the IO. Else, just locally terminate the IO in the firmware
+ */
+ rport = starget_to_rport(scsi_target(sc->device));
+ if (fc_remote_port_chkready(rport) == 0)
+ task_req = FCPIO_ITMF_ABT_TASK;
+ else
+ task_req = FCPIO_ITMF_ABT_TASK_TERM;
+
+ /* Now queue the abort command to firmware */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
+ fc_lun.scsi_lun, io_req)) {
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (io_req)
+ io_req->abts_done = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = FAILED;
+ goto fnic_abort_cmd_end;
+ }
+
+ /*
+ * We queued an abort IO, wait for its completion.
+ * Once the firmware completes the abort command, it will
+ * wake up this thread.
+ */
+ wait_pending:
+ wait_for_completion_timeout(&tm_done,
+ msecs_to_jiffies
+ (2 * fnic->config.ra_tov +
+ fnic->config.ed_tov));
+
+ /* Check the abort status */
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = FAILED;
+ goto fnic_abort_cmd_end;
+ }
+ io_req->abts_done = NULL;
+
+ /* fw did not complete abort, timed out */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = FAILED;
+ goto fnic_abort_cmd_end;
+ }
+
+ /*
+ * firmware completed the abort, check the status,
+ * free the io_req irrespective of failure or success
+ */
+ if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
+ ret = FAILED;
+
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+
+fnic_abort_cmd_end:
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Returning from abort cmd %s\n",
+ (ret == SUCCESS) ?
+ "SUCCESS" : "FAILED");
+ return ret;
+}
+
+static inline int fnic_queue_dr_io_req(struct fnic *fnic,
+ struct scsi_cmnd *sc,
+ struct fnic_io_req *io_req)
+{
+ struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ struct scsi_lun fc_lun;
+ int ret = 0;
+ unsigned long intr_flags;
+
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (!vnic_wq_copy_desc_avail(wq)) {
+ ret = -EAGAIN;
+ goto lr_io_req_end;
+ }
+
+ /* fill in the lun info */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
+ 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
+ fc_lun.scsi_lun, io_req->port_id,
+ fnic->config.ra_tov, fnic->config.ed_tov);
+
+lr_io_req_end:
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+
+ return ret;
+}
+
+/*
+ * Clean up any pending aborts on the lun
+ * For each outstanding IO on this lun, whose abort is not completed by fw,
+ * issue a local abort. Wait for abort to complete. Return 0 if all commands
+ * successfully aborted, 1 otherwise
+ */
+static int fnic_clean_pending_aborts(struct fnic *fnic,
+ struct scsi_cmnd *lr_sc)
+{
+ int tag;
+ struct fnic_io_req *io_req;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ int ret = 0;
+ struct scsi_cmnd *sc;
+ struct fc_rport *rport;
+ struct scsi_lun fc_lun;
+ struct scsi_device *lun_dev = lr_sc->device;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+
+ for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ sc = scsi_host_find_tag(fnic->lport->host, tag);
+ /*
+ * ignore this lun reset cmd or cmds that do not belong to
+ * this lun
+ */
+ if (!sc || sc == lr_sc || sc->device != lun_dev)
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ if (!io_req || sc->device != lun_dev) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+
+ /*
+ * Found IO that is still pending with firmware and
+ * belongs to the LUN that we are resetting
+ */
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Found IO in %s on lun\n",
+ fnic_ioreq_state_to_str(CMD_STATE(sc)));
+
+ BUG_ON(CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING);
+
+ CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+ io_req->abts_done = &tm_done;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* Now queue the abort command to firmware */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+ rport = starget_to_rport(scsi_target(sc->device));
+
+ if (fnic_queue_abort_io_req(fnic, tag,
+ FCPIO_ITMF_ABT_TASK_TERM,
+ fc_lun.scsi_lun, io_req)) {
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (io_req)
+ io_req->abts_done = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = 1;
+ goto clean_pending_aborts_end;
+ }
+
+ wait_for_completion_timeout(&tm_done,
+ msecs_to_jiffies
+ (fnic->config.ed_tov));
+
+ /* Recheck cmd state to check if it is now aborted */
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = 1;
+ goto clean_pending_aborts_end;
+ }
+
+ io_req->abts_done = NULL;
+
+ /* if abort is still pending with fw, fail */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = 1;
+ goto clean_pending_aborts_end;
+ }
+ CMD_SP(sc) = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ }
+
+clean_pending_aborts_end:
+ return ret;
+}
+
+/*
+ * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
+ * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
+ * on the LUN.
+ */
+int fnic_device_reset(struct scsi_cmnd *sc)
+{
+ struct fc_lport *lp;
+ struct fnic *fnic;
+ struct fnic_io_req *io_req;
+ struct fc_rport *rport;
+ int status;
+ int ret = FAILED;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+
+ /* Wait for rport to unblock */
+ fnic_block_error_handler(sc);
+
+ /* Get local-port, check ready and link up */
+ lp = shost_priv(sc->device->host);
+
+ fnic = lport_priv(lp);
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "Device reset called FCID 0x%x, LUN 0x%x\n",
+ (starget_to_rport(scsi_target(sc->device)))->port_id,
+ sc->device->lun);
+
+
+ if (lp->state != LPORT_ST_READY || !(lp->link_up))
+ goto fnic_device_reset_end;
+
+ /* Check if remote port up */
+ rport = starget_to_rport(scsi_target(sc->device));
+ if (fc_remote_port_chkready(rport))
+ goto fnic_device_reset_end;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ /*
+ * If there is a io_req attached to this command, then use it,
+ * else allocate a new one.
+ */
+ if (!io_req) {
+ io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto fnic_device_reset_end;
+ }
+ memset(io_req, 0, sizeof(*io_req));
+ io_req->port_id = rport->port_id;
+ CMD_SP(sc) = (char *)io_req;
+ }
+ io_req->dr_done = &tm_done;
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
+ CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %d\n",
+ sc->request->tag);
+
+ /*
+ * issue the device reset, if enqueue failed, clean up the ioreq
+ * and break assoc with scsi cmd
+ */
+ if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (io_req)
+ io_req->dr_done = NULL;
+ goto fnic_device_reset_clean;
+ }
+
+ /*
+ * Wait on the local completion for LUN reset. The io_req may be
+ * freed while we wait since we hold no lock.
+ */
+ wait_for_completion_timeout(&tm_done,
+ msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
+
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto fnic_device_reset_end;
+ }
+ io_req->dr_done = NULL;
+
+ status = CMD_LR_STATUS(sc);
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /*
+ * If lun reset not completed, bail out with failed. io_req
+ * gets cleaned up during higher levels of EH
+ */
+ if (status == FCPIO_INVALID_CODE) {
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Device reset timed out\n");
+ goto fnic_device_reset_end;
+ }
+
+ /* Completed, but not successful, clean up the io_req, return fail */
+ if (status != FCPIO_SUCCESS) {
+ spin_lock_irqsave(io_lock, flags);
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "Device reset completed - failed\n");
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ goto fnic_device_reset_clean;
+ }
+
+ /*
+ * Clean up any aborts on this lun that have still not
+ * completed. If any of these fail, then LUN reset fails.
+ * clean_pending_aborts cleans all cmds on this lun except
+ * the lun reset cmd. If all cmds get cleaned, the lun reset
+ * succeeds
+ */
+ if (fnic_clean_pending_aborts(fnic, sc)) {
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Device reset failed"
+ " since could not abort all IOs\n");
+ goto fnic_device_reset_clean;
+ }
+
+ /* Clean lun reset command */
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (io_req)
+ /* Completed, and successful */
+ ret = SUCCESS;
+
+fnic_device_reset_clean:
+ if (io_req)
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ if (io_req) {
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ }
+
+fnic_device_reset_end:
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Returning from device reset %s\n",
+ (ret == SUCCESS) ?
+ "SUCCESS" : "FAILED");
+ return ret;
+}
+
+/* Clean up all IOs, clean up libFC local port */
+int fnic_reset(struct Scsi_Host *shost)
+{
+ struct fc_lport *lp;
+ struct fnic *fnic;
+ int ret = SUCCESS;
+
+ lp = shost_priv(shost);
+ fnic = lport_priv(lp);
+
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic_reset called\n");
+
+ /*
+ * Reset local port, this will clean up libFC exchanges,
+ * reset remote port sessions, and if link is up, begin flogi
+ */
+ if (lp->tt.lport_reset(lp))
+ ret = FAILED;
+
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Returning from fnic reset %s\n",
+ (ret == SUCCESS) ?
+ "SUCCESS" : "FAILED");
+
+ return ret;
+}
+
+/*
+ * SCSI Error handling calls driver's eh_host_reset if all prior
+ * error handling levels return FAILED. If host reset completes
+ * successfully, and if link is up, then Fabric login begins.
+ *
+ * Host Reset is the highest level of error recovery. If this fails, then
+ * host is offlined by SCSI.
+ *
+ */
+int fnic_host_reset(struct scsi_cmnd *sc)
+{
+ int ret;
+ unsigned long wait_host_tmo;
+ struct Scsi_Host *shost = sc->device->host;
+ struct fc_lport *lp = shost_priv(shost);
+
+ /*
+ * If fnic_reset is successful, wait for fabric login to complete
+ * scsi-ml tries to send a TUR to every device if host reset is
+ * successful, so before returning to scsi, fabric should be up
+ */
+ ret = fnic_reset(shost);
+ if (ret == SUCCESS) {
+ wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
+ ret = FAILED;
+ while (time_before(jiffies, wait_host_tmo)) {
+ if ((lp->state == LPORT_ST_READY) &&
+ (lp->link_up)) {
+ ret = SUCCESS;
+ break;
+ }
+ ssleep(1);
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * This fxn is called from libFC when host is removed
+ */
+void fnic_scsi_abort_io(struct fc_lport *lp)
+{
+ int err = 0;
+ unsigned long flags;
+ enum fnic_state old_state;
+ struct fnic *fnic = lport_priv(lp);
+ DECLARE_COMPLETION_ONSTACK(remove_wait);
+
+ /* Issue firmware reset for fnic, wait for reset to complete */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->remove_wait = &remove_wait;
+ old_state = fnic->state;
+ fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+ vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ err = fnic_fw_reset_handler(fnic);
+ if (err) {
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
+ fnic->state = old_state;
+ fnic->remove_wait = NULL;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+
+ /* Wait for firmware reset to complete */
+ wait_for_completion_timeout(&remove_wait,
+ msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->remove_wait = NULL;
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic_scsi_abort_io %s\n",
+ (fnic->state == FNIC_IN_ETH_MODE) ?
+ "SUCCESS" : "FAILED");
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+}
+
+/*
+ * This fxn called from libFC to clean up driver IO state on link down
+ */
+void fnic_scsi_cleanup(struct fc_lport *lp)
+{
+ unsigned long flags;
+ enum fnic_state old_state;
+ struct fnic *fnic = lport_priv(lp);
+
+ /* issue fw reset */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ old_state = fnic->state;
+ fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+ vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (fnic_fw_reset_handler(fnic)) {
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
+ fnic->state = old_state;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ }
+
+}
+
+void fnic_empty_scsi_cleanup(struct fc_lport *lp)
+{
+}
+
+void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
+{
+ struct fnic *fnic = lport_priv(lp);
+
+ /* Non-zero sid, nothing to do */
+ if (sid)
+ goto call_fc_exch_mgr_reset;
+
+ if (did) {
+ fnic_rport_exch_reset(fnic, did);
+ goto call_fc_exch_mgr_reset;
+ }
+
+ /*
+ * sid = 0, did = 0
+ * link down or device being removed
+ */
+ if (!fnic->in_remove)
+ fnic_scsi_cleanup(lp);
+ else
+ fnic_scsi_abort_io(lp);
+
+ /* call libFC exch mgr reset to reset its exchanges */
+call_fc_exch_mgr_reset:
+ fc_exch_mgr_reset(lp, sid, did);
+
+}
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _RQ_ENET_DESC_H_
+#define _RQ_ENET_DESC_H_
+
+/* Ethernet receive queue descriptor: 16B */
+struct rq_enet_desc {
+ __le64 address;
+ __le16 length_type;
+ u8 reserved[6];
+};
+
+enum rq_enet_type_types {
+ RQ_ENET_TYPE_ONLY_SOP = 0,
+ RQ_ENET_TYPE_NOT_SOP = 1,
+ RQ_ENET_TYPE_RESV2 = 2,
+ RQ_ENET_TYPE_RESV3 = 3,
+};
+
+#define RQ_ENET_ADDR_BITS 64
+#define RQ_ENET_LEN_BITS 14
+#define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1)
+#define RQ_ENET_TYPE_BITS 2
+#define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1)
+
+static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
+ u64 address, u8 type, u16 length)
+{
+ desc->address = cpu_to_le64(address);
+ desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
+ ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
+}
+
+static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
+ u64 *address, u8 *type, u16 *length)
+{
+ *address = le64_to_cpu(desc->address);
+ *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
+ *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
+ RQ_ENET_TYPE_MASK);
+}
+
+#endif /* _RQ_ENET_DESC_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+void vnic_cq_free(struct vnic_cq *cq)
+{
+ vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
+
+ cq->ctrl = NULL;
+}
+
+int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ int err;
+
+ cq->index = index;
+ cq->vdev = vdev;
+
+ cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
+ if (!cq->ctrl) {
+ printk(KERN_ERR "Failed to hook CQ[%d] resource\n", index);
+ return -EINVAL;
+ }
+
+ err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
+ unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
+ unsigned int cq_tail_color, unsigned int interrupt_enable,
+ unsigned int cq_entry_enable, unsigned int cq_message_enable,
+ unsigned int interrupt_offset, u64 cq_message_addr)
+{
+ u64 paddr;
+
+ paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &cq->ctrl->ring_base);
+ iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
+ iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
+ iowrite32(color_enable, &cq->ctrl->color_enable);
+ iowrite32(cq_head, &cq->ctrl->cq_head);
+ iowrite32(cq_tail, &cq->ctrl->cq_tail);
+ iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
+ iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
+ iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
+ iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
+ iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
+ writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
+}
+
+void vnic_cq_clean(struct vnic_cq *cq)
+{
+ cq->to_clean = 0;
+ cq->last_color = 0;
+
+ iowrite32(0, &cq->ctrl->cq_head);
+ iowrite32(0, &cq->ctrl->cq_tail);
+ iowrite32(1, &cq->ctrl->cq_tail_color);
+
+ vnic_dev_clear_desc_ring(&cq->ring);
+}
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_CQ_H_
+#define _VNIC_CQ_H_
+
+#include "cq_desc.h"
+#include "vnic_dev.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_cq_service fnic_cq_service
+#define vnic_cq_free fnic_cq_free
+#define vnic_cq_alloc fnic_cq_alloc
+#define vnic_cq_init fnic_cq_init
+#define vnic_cq_clean fnic_cq_clean
+
+/* Completion queue control */
+struct vnic_cq_ctrl {
+ u64 ring_base; /* 0x00 */
+ u32 ring_size; /* 0x08 */
+ u32 pad0;
+ u32 flow_control_enable; /* 0x10 */
+ u32 pad1;
+ u32 color_enable; /* 0x18 */
+ u32 pad2;
+ u32 cq_head; /* 0x20 */
+ u32 pad3;
+ u32 cq_tail; /* 0x28 */
+ u32 pad4;
+ u32 cq_tail_color; /* 0x30 */
+ u32 pad5;
+ u32 interrupt_enable; /* 0x38 */
+ u32 pad6;
+ u32 cq_entry_enable; /* 0x40 */
+ u32 pad7;
+ u32 cq_message_enable; /* 0x48 */
+ u32 pad8;
+ u32 interrupt_offset; /* 0x50 */
+ u32 pad9;
+ u64 cq_message_addr; /* 0x58 */
+ u32 pad10;
+};
+
+struct vnic_cq {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
+ struct vnic_dev_ring ring;
+ unsigned int to_clean;
+ unsigned int last_color;
+};
+
+static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
+ unsigned int work_to_do,
+ int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
+ u8 type, u16 q_number, u16 completed_index, void *opaque),
+ void *opaque)
+{
+ struct cq_desc *cq_desc;
+ unsigned int work_done = 0;
+ u16 q_number, completed_index;
+ u8 type, color;
+
+ cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
+ cq->ring.desc_size * cq->to_clean);
+ cq_desc_dec(cq_desc, &type, &color,
+ &q_number, &completed_index);
+
+ while (color != cq->last_color) {
+
+ if ((*q_service)(cq->vdev, cq_desc, type,
+ q_number, completed_index, opaque))
+ break;
+
+ cq->to_clean++;
+ if (cq->to_clean == cq->ring.desc_count) {
+ cq->to_clean = 0;
+ cq->last_color = cq->last_color ? 0 : 1;
+ }
+
+ cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
+ cq->ring.desc_size * cq->to_clean);
+ cq_desc_dec(cq_desc, &type, &color,
+ &q_number, &completed_index);
+
+ work_done++;
+ if (work_done >= work_to_do)
+ break;
+ }
+
+ return work_done;
+}
+
+void vnic_cq_free(struct vnic_cq *cq);
+int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
+ unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
+ unsigned int cq_tail_color, unsigned int interrupt_enable,
+ unsigned int cq_entry_enable, unsigned int message_enable,
+ unsigned int interrupt_offset, u64 message_addr);
+void vnic_cq_clean(struct vnic_cq *cq);
+
+#endif /* _VNIC_CQ_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_CQ_COPY_H_
+#define _VNIC_CQ_COPY_H_
+
+#include "fcpio.h"
+
+static inline unsigned int vnic_cq_copy_service(
+ struct vnic_cq *cq,
+ int (*q_service)(struct vnic_dev *vdev,
+ unsigned int index,
+ struct fcpio_fw_req *desc),
+ unsigned int work_to_do)
+
+{
+ struct fcpio_fw_req *desc;
+ unsigned int work_done = 0;
+ u8 color;
+
+ desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
+ cq->ring.desc_size * cq->to_clean);
+ fcpio_color_dec(desc, &color);
+
+ while (color != cq->last_color) {
+
+ if ((*q_service)(cq->vdev, cq->index, desc))
+ break;
+
+ cq->to_clean++;
+ if (cq->to_clean == cq->ring.desc_count) {
+ cq->to_clean = 0;
+ cq->last_color = cq->last_color ? 0 : 1;
+ }
+
+ desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
+ cq->ring.desc_size * cq->to_clean);
+ fcpio_color_dec(desc, &color);
+
+ work_done++;
+ if (work_done >= work_to_do)
+ break;
+ }
+
+ return work_done;
+}
+
+#endif /* _VNIC_CQ_COPY_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/if_ether.h>
+#include "vnic_resource.h"
+#include "vnic_devcmd.h"
+#include "vnic_dev.h"
+#include "vnic_stats.h"
+
+struct vnic_res {
+ void __iomem *vaddr;
+ unsigned int count;
+};
+
+struct vnic_dev {
+ void *priv;
+ struct pci_dev *pdev;
+ struct vnic_res res[RES_TYPE_MAX];
+ enum vnic_dev_intr_mode intr_mode;
+ struct vnic_devcmd __iomem *devcmd;
+ struct vnic_devcmd_notify *notify;
+ struct vnic_devcmd_notify notify_copy;
+ dma_addr_t notify_pa;
+ u32 *linkstatus;
+ dma_addr_t linkstatus_pa;
+ struct vnic_stats *stats;
+ dma_addr_t stats_pa;
+ struct vnic_devcmd_fw_info *fw_info;
+ dma_addr_t fw_info_pa;
+};
+
+#define VNIC_MAX_RES_HDR_SIZE \
+ (sizeof(struct vnic_resource_header) + \
+ sizeof(struct vnic_resource) * RES_TYPE_MAX)
+#define VNIC_RES_STRIDE 128
+
+void *vnic_dev_priv(struct vnic_dev *vdev)
+{
+ return vdev->priv;
+}
+
+static int vnic_dev_discover_res(struct vnic_dev *vdev,
+ struct vnic_dev_bar *bar)
+{
+ struct vnic_resource_header __iomem *rh;
+ struct vnic_resource __iomem *r;
+ u8 type;
+
+ if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
+ printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
+ return -EINVAL;
+ }
+
+ rh = bar->vaddr;
+ if (!rh) {
+ printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
+ return -EINVAL;
+ }
+
+ if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
+ ioread32(&rh->version) != VNIC_RES_VERSION) {
+ printk(KERN_ERR "vNIC BAR0 res magic/version error "
+ "exp (%lx/%lx) curr (%x/%x)\n",
+ VNIC_RES_MAGIC, VNIC_RES_VERSION,
+ ioread32(&rh->magic), ioread32(&rh->version));
+ return -EINVAL;
+ }
+
+ r = (struct vnic_resource __iomem *)(rh + 1);
+
+ while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
+
+ u8 bar_num = ioread8(&r->bar);
+ u32 bar_offset = ioread32(&r->bar_offset);
+ u32 count = ioread32(&r->count);
+ u32 len;
+
+ r++;
+
+ if (bar_num != 0) /* only mapping in BAR0 resources */
+ continue;
+
+ switch (type) {
+ case RES_TYPE_WQ:
+ case RES_TYPE_RQ:
+ case RES_TYPE_CQ:
+ case RES_TYPE_INTR_CTRL:
+ /* each count is stride bytes long */
+ len = count * VNIC_RES_STRIDE;
+ if (len + bar_offset > bar->len) {
+ printk(KERN_ERR "vNIC BAR0 resource %d "
+ "out-of-bounds, offset 0x%x + "
+ "size 0x%x > bar len 0x%lx\n",
+ type, bar_offset,
+ len,
+ bar->len);
+ return -EINVAL;
+ }
+ break;
+ case RES_TYPE_INTR_PBA_LEGACY:
+ case RES_TYPE_DEVCMD:
+ len = count;
+ break;
+ default:
+ continue;
+ }
+
+ vdev->res[type].count = count;
+ vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
+ }
+
+ return 0;
+}
+
+unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
+ enum vnic_res_type type)
+{
+ return vdev->res[type].count;
+}
+
+void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
+ unsigned int index)
+{
+ if (!vdev->res[type].vaddr)
+ return NULL;
+
+ switch (type) {
+ case RES_TYPE_WQ:
+ case RES_TYPE_RQ:
+ case RES_TYPE_CQ:
+ case RES_TYPE_INTR_CTRL:
+ return (char __iomem *)vdev->res[type].vaddr +
+ index * VNIC_RES_STRIDE;
+ default:
+ return (char __iomem *)vdev->res[type].vaddr;
+ }
+}
+
+unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
+ unsigned int desc_count,
+ unsigned int desc_size)
+{
+ /* The base address of the desc rings must be 512 byte aligned.
+ * Descriptor count is aligned to groups of 32 descriptors. A
+ * count of 0 means the maximum 4096 descriptors. Descriptor
+ * size is aligned to 16 bytes.
+ */
+
+ unsigned int count_align = 32;
+ unsigned int desc_align = 16;
+
+ ring->base_align = 512;
+
+ if (desc_count == 0)
+ desc_count = 4096;
+
+ ring->desc_count = ALIGN(desc_count, count_align);
+
+ ring->desc_size = ALIGN(desc_size, desc_align);
+
+ ring->size = ring->desc_count * ring->desc_size;
+ ring->size_unaligned = ring->size + ring->base_align;
+
+ return ring->size_unaligned;
+}
+
+void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
+{
+ memset(ring->descs, 0, ring->size);
+}
+
+int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ vnic_dev_desc_ring_size(ring, desc_count, desc_size);
+
+ ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
+ ring->size_unaligned,
+ &ring->base_addr_unaligned);
+
+ if (!ring->descs_unaligned) {
+ printk(KERN_ERR
+ "Failed to allocate ring (size=%d), aborting\n",
+ (int)ring->size);
+ return -ENOMEM;
+ }
+
+ ring->base_addr = ALIGN(ring->base_addr_unaligned,
+ ring->base_align);
+ ring->descs = (u8 *)ring->descs_unaligned +
+ (ring->base_addr - ring->base_addr_unaligned);
+
+ vnic_dev_clear_desc_ring(ring);
+
+ ring->desc_avail = ring->desc_count - 1;
+
+ return 0;
+}
+
+void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
+{
+ if (ring->descs) {
+ pci_free_consistent(vdev->pdev,
+ ring->size_unaligned,
+ ring->descs_unaligned,
+ ring->base_addr_unaligned);
+ ring->descs = NULL;
+ }
+}
+
+int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
+ u64 *a0, u64 *a1, int wait)
+{
+ struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
+ int delay;
+ u32 status;
+ int dev_cmd_err[] = {
+ /* convert from fw's version of error.h to host's version */
+ 0, /* ERR_SUCCESS */
+ EINVAL, /* ERR_EINVAL */
+ EFAULT, /* ERR_EFAULT */
+ EPERM, /* ERR_EPERM */
+ EBUSY, /* ERR_EBUSY */
+ };
+ int err;
+
+ status = ioread32(&devcmd->status);
+ if (status & STAT_BUSY) {
+ printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
+ return -EBUSY;
+ }
+
+ if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
+ writeq(*a0, &devcmd->args[0]);
+ writeq(*a1, &devcmd->args[1]);
+ wmb();
+ }
+
+ iowrite32(cmd, &devcmd->cmd);
+
+ if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
+ return 0;
+
+ for (delay = 0; delay < wait; delay++) {
+
+ udelay(100);
+
+ status = ioread32(&devcmd->status);
+ if (!(status & STAT_BUSY)) {
+
+ if (status & STAT_ERROR) {
+ err = dev_cmd_err[(int)readq(&devcmd->args[0])];
+ printk(KERN_ERR "Error %d devcmd %d\n",
+ err, _CMD_N(cmd));
+ return -err;
+ }
+
+ if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
+ rmb();
+ *a0 = readq(&devcmd->args[0]);
+ *a1 = readq(&devcmd->args[1]);
+ }
+
+ return 0;
+ }
+ }
+
+ printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
+ return -ETIMEDOUT;
+}
+
+int vnic_dev_fw_info(struct vnic_dev *vdev,
+ struct vnic_devcmd_fw_info **fw_info)
+{
+ u64 a0, a1 = 0;
+ int wait = 1000;
+ int err = 0;
+
+ if (!vdev->fw_info) {
+ vdev->fw_info = pci_alloc_consistent(vdev->pdev,
+ sizeof(struct vnic_devcmd_fw_info),
+ &vdev->fw_info_pa);
+ if (!vdev->fw_info)
+ return -ENOMEM;
+
+ a0 = vdev->fw_info_pa;
+
+ /* only get fw_info once and cache it */
+ err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
+ }
+
+ *fw_info = vdev->fw_info;
+
+ return err;
+}
+
+int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
+ void *value)
+{
+ u64 a0, a1;
+ int wait = 1000;
+ int err;
+
+ a0 = offset;
+ a1 = size;
+
+ err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
+
+ switch (size) {
+ case 1:
+ *(u8 *)value = (u8)a0;
+ break;
+ case 2:
+ *(u16 *)value = (u16)a0;
+ break;
+ case 4:
+ *(u32 *)value = (u32)a0;
+ break;
+ case 8:
+ *(u64 *)value = a0;
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ return err;
+}
+
+int vnic_dev_stats_clear(struct vnic_dev *vdev)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
+}
+
+int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
+{
+ u64 a0, a1;
+ int wait = 1000;
+
+ if (!vdev->stats) {
+ vdev->stats = pci_alloc_consistent(vdev->pdev,
+ sizeof(struct vnic_stats), &vdev->stats_pa);
+ if (!vdev->stats)
+ return -ENOMEM;
+ }
+
+ *stats = vdev->stats;
+ a0 = vdev->stats_pa;
+ a1 = sizeof(struct vnic_stats);
+
+ return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
+}
+
+int vnic_dev_close(struct vnic_dev *vdev)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
+}
+
+int vnic_dev_enable(struct vnic_dev *vdev)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
+}
+
+int vnic_dev_disable(struct vnic_dev *vdev)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
+}
+
+int vnic_dev_open(struct vnic_dev *vdev, int arg)
+{
+ u64 a0 = (u32)arg, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
+}
+
+int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+
+ *done = 0;
+
+ err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
+ if (err)
+ return err;
+
+ *done = (a0 == 0);
+
+ return 0;
+}
+
+int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
+{
+ u64 a0 = (u32)arg, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
+}
+
+int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+
+ *done = 0;
+
+ err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
+ if (err)
+ return err;
+
+ *done = (a0 == 0);
+
+ return 0;
+}
+
+int vnic_dev_hang_notify(struct vnic_dev *vdev)
+{
+ u64 a0, a1;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
+}
+
+int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
+{
+ u64 a0, a1;
+ int wait = 1000;
+ int err, i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ mac_addr[i] = 0;
+
+ err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
+ if (err)
+ return err;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ mac_addr[i] = ((u8 *)&a0)[i];
+
+ return 0;
+}
+
+void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
+ int broadcast, int promisc, int allmulti)
+{
+ u64 a0, a1 = 0;
+ int wait = 1000;
+ int err;
+
+ a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
+ (multicast ? CMD_PFILTER_MULTICAST : 0) |
+ (broadcast ? CMD_PFILTER_BROADCAST : 0) |
+ (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
+ (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
+
+ err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
+ if (err)
+ printk(KERN_ERR "Can't set packet filter\n");
+}
+
+void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ ((u8 *)&a0)[i] = addr[i];
+
+ err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
+ if (err)
+ printk(KERN_ERR
+ "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
+ addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
+ err);
+}
+
+void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ ((u8 *)&a0)[i] = addr[i];
+
+ err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
+ if (err)
+ printk(KERN_ERR
+ "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
+ addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
+ err);
+}
+
+int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
+{
+ u64 a0, a1;
+ int wait = 1000;
+
+ if (!vdev->notify) {
+ vdev->notify = pci_alloc_consistent(vdev->pdev,
+ sizeof(struct vnic_devcmd_notify),
+ &vdev->notify_pa);
+ if (!vdev->notify)
+ return -ENOMEM;
+ }
+
+ a0 = vdev->notify_pa;
+ a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
+ a1 += sizeof(struct vnic_devcmd_notify);
+
+ return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+}
+
+void vnic_dev_notify_unset(struct vnic_dev *vdev)
+{
+ u64 a0, a1;
+ int wait = 1000;
+
+ a0 = 0; /* paddr = 0 to unset notify buffer */
+ a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
+ a1 += sizeof(struct vnic_devcmd_notify);
+
+ vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+}
+
+static int vnic_dev_notify_ready(struct vnic_dev *vdev)
+{
+ u32 *words;
+ unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
+ unsigned int i;
+ u32 csum;
+
+ if (!vdev->notify)
+ return 0;
+
+ do {
+ csum = 0;
+ memcpy(&vdev->notify_copy, vdev->notify,
+ sizeof(struct vnic_devcmd_notify));
+ words = (u32 *)&vdev->notify_copy;
+ for (i = 1; i < nwords; i++)
+ csum += words[i];
+ } while (csum != words[0]);
+
+ return 1;
+}
+
+int vnic_dev_init(struct vnic_dev *vdev, int arg)
+{
+ u64 a0 = (u32)arg, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
+}
+
+int vnic_dev_link_status(struct vnic_dev *vdev)
+{
+ if (vdev->linkstatus)
+ return *vdev->linkstatus;
+
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.link_state;
+}
+
+u32 vnic_dev_port_speed(struct vnic_dev *vdev)
+{
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.port_speed;
+}
+
+u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
+{
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.msglvl;
+}
+
+u32 vnic_dev_mtu(struct vnic_dev *vdev)
+{
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.mtu;
+}
+
+u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
+{
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.link_down_cnt;
+}
+
+void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
+ enum vnic_dev_intr_mode intr_mode)
+{
+ vdev->intr_mode = intr_mode;
+}
+
+enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
+ struct vnic_dev *vdev)
+{
+ return vdev->intr_mode;
+}
+
+void vnic_dev_unregister(struct vnic_dev *vdev)
+{
+ if (vdev) {
+ if (vdev->notify)
+ pci_free_consistent(vdev->pdev,
+ sizeof(struct vnic_devcmd_notify),
+ vdev->notify,
+ vdev->notify_pa);
+ if (vdev->linkstatus)
+ pci_free_consistent(vdev->pdev,
+ sizeof(u32),
+ vdev->linkstatus,
+ vdev->linkstatus_pa);
+ if (vdev->stats)
+ pci_free_consistent(vdev->pdev,
+ sizeof(struct vnic_dev),
+ vdev->stats, vdev->stats_pa);
+ if (vdev->fw_info)
+ pci_free_consistent(vdev->pdev,
+ sizeof(struct vnic_devcmd_fw_info),
+ vdev->fw_info, vdev->fw_info_pa);
+ kfree(vdev);
+ }
+}
+
+struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
+ void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
+{
+ if (!vdev) {
+ vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
+ if (!vdev)
+ return NULL;
+ }
+
+ vdev->priv = priv;
+ vdev->pdev = pdev;
+
+ if (vnic_dev_discover_res(vdev, bar))
+ goto err_out;
+
+ vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
+ if (!vdev->devcmd)
+ goto err_out;
+
+ return vdev;
+
+err_out:
+ vnic_dev_unregister(vdev);
+ return NULL;
+}
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_DEV_H_
+#define _VNIC_DEV_H_
+
+#include "vnic_resource.h"
+#include "vnic_devcmd.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_dev_priv fnic_dev_priv
+#define vnic_dev_get_res_count fnic_dev_get_res_count
+#define vnic_dev_get_res fnic_dev_get_res
+#define vnic_dev_desc_ring_size fnic_dev_desc_ring_siz
+#define vnic_dev_clear_desc_ring fnic_dev_clear_desc_ring
+#define vnic_dev_alloc_desc_ring fnic_dev_alloc_desc_ring
+#define vnic_dev_free_desc_ring fnic_dev_free_desc_ring
+#define vnic_dev_cmd fnic_dev_cmd
+#define vnic_dev_fw_info fnic_dev_fw_info
+#define vnic_dev_spec fnic_dev_spec
+#define vnic_dev_stats_clear fnic_dev_stats_clear
+#define vnic_dev_stats_dump fnic_dev_stats_dump
+#define vnic_dev_hang_notify fnic_dev_hang_notify
+#define vnic_dev_packet_filter fnic_dev_packet_filter
+#define vnic_dev_add_addr fnic_dev_add_addr
+#define vnic_dev_del_addr fnic_dev_del_addr
+#define vnic_dev_mac_addr fnic_dev_mac_addr
+#define vnic_dev_notify_set fnic_dev_notify_set
+#define vnic_dev_notify_unset fnic_dev_notify_unset
+#define vnic_dev_link_status fnic_dev_link_status
+#define vnic_dev_port_speed fnic_dev_port_speed
+#define vnic_dev_msg_lvl fnic_dev_msg_lvl
+#define vnic_dev_mtu fnic_dev_mtu
+#define vnic_dev_link_down_cnt fnic_dev_link_down_cnt
+#define vnic_dev_close fnic_dev_close
+#define vnic_dev_enable fnic_dev_enable
+#define vnic_dev_disable fnic_dev_disable
+#define vnic_dev_open fnic_dev_open
+#define vnic_dev_open_done fnic_dev_open_done
+#define vnic_dev_init fnic_dev_init
+#define vnic_dev_soft_reset fnic_dev_soft_reset
+#define vnic_dev_soft_reset_done fnic_dev_soft_reset_done
+#define vnic_dev_set_intr_mode fnic_dev_set_intr_mode
+#define vnic_dev_get_intr_mode fnic_dev_get_intr_mode
+#define vnic_dev_unregister fnic_dev_unregister
+#define vnic_dev_register fnic_dev_register
+
+#ifndef VNIC_PADDR_TARGET
+#define VNIC_PADDR_TARGET 0x0000000000000000ULL
+#endif
+
+#ifndef readq
+static inline u64 readq(void __iomem *reg)
+{
+ return ((u64)readl(reg + 0x4UL) << 32) | (u64)readl(reg);
+}
+
+static inline void writeq(u64 val, void __iomem *reg)
+{
+ writel(val & 0xffffffff, reg);
+ writel(val >> 32, reg + 0x4UL);
+}
+#endif
+
+enum vnic_dev_intr_mode {
+ VNIC_DEV_INTR_MODE_UNKNOWN,
+ VNIC_DEV_INTR_MODE_INTX,
+ VNIC_DEV_INTR_MODE_MSI,
+ VNIC_DEV_INTR_MODE_MSIX,
+};
+
+struct vnic_dev_bar {
+ void __iomem *vaddr;
+ dma_addr_t bus_addr;
+ unsigned long len;
+};
+
+struct vnic_dev_ring {
+ void *descs;
+ size_t size;
+ dma_addr_t base_addr;
+ size_t base_align;
+ void *descs_unaligned;
+ size_t size_unaligned;
+ dma_addr_t base_addr_unaligned;
+ unsigned int desc_size;
+ unsigned int desc_count;
+ unsigned int desc_avail;
+};
+
+struct vnic_dev;
+struct vnic_stats;
+
+void *vnic_dev_priv(struct vnic_dev *vdev);
+unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
+ enum vnic_res_type type);
+void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
+ unsigned int index);
+unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
+ unsigned int desc_count,
+ unsigned int desc_size);
+void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring);
+int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_dev_free_desc_ring(struct vnic_dev *vdev,
+ struct vnic_dev_ring *ring);
+int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
+ u64 *a0, u64 *a1, int wait);
+int vnic_dev_fw_info(struct vnic_dev *vdev,
+ struct vnic_devcmd_fw_info **fw_info);
+int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset,
+ unsigned int size, void *value);
+int vnic_dev_stats_clear(struct vnic_dev *vdev);
+int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats);
+int vnic_dev_hang_notify(struct vnic_dev *vdev);
+void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
+ int broadcast, int promisc, int allmulti);
+void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr);
+void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr);
+int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr);
+int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr);
+void vnic_dev_notify_unset(struct vnic_dev *vdev);
+int vnic_dev_link_status(struct vnic_dev *vdev);
+u32 vnic_dev_port_speed(struct vnic_dev *vdev);
+u32 vnic_dev_msg_lvl(struct vnic_dev *vdev);
+u32 vnic_dev_mtu(struct vnic_dev *vdev);
+u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev);
+int vnic_dev_close(struct vnic_dev *vdev);
+int vnic_dev_enable(struct vnic_dev *vdev);
+int vnic_dev_disable(struct vnic_dev *vdev);
+int vnic_dev_open(struct vnic_dev *vdev, int arg);
+int vnic_dev_open_done(struct vnic_dev *vdev, int *done);
+int vnic_dev_init(struct vnic_dev *vdev, int arg);
+int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg);
+int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done);
+void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
+ enum vnic_dev_intr_mode intr_mode);
+enum vnic_dev_intr_mode vnic_dev_get_intr_mode(struct vnic_dev *vdev);
+void vnic_dev_unregister(struct vnic_dev *vdev);
+struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
+ void *priv, struct pci_dev *pdev,
+ struct vnic_dev_bar *bar);
+
+#endif /* _VNIC_DEV_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_DEVCMD_H_
+#define _VNIC_DEVCMD_H_
+
+#define _CMD_NBITS 14
+#define _CMD_VTYPEBITS 10
+#define _CMD_FLAGSBITS 6
+#define _CMD_DIRBITS 2
+
+#define _CMD_NMASK ((1 << _CMD_NBITS)-1)
+#define _CMD_VTYPEMASK ((1 << _CMD_VTYPEBITS)-1)
+#define _CMD_FLAGSMASK ((1 << _CMD_FLAGSBITS)-1)
+#define _CMD_DIRMASK ((1 << _CMD_DIRBITS)-1)
+
+#define _CMD_NSHIFT 0
+#define _CMD_VTYPESHIFT (_CMD_NSHIFT+_CMD_NBITS)
+#define _CMD_FLAGSSHIFT (_CMD_VTYPESHIFT+_CMD_VTYPEBITS)
+#define _CMD_DIRSHIFT (_CMD_FLAGSSHIFT+_CMD_FLAGSBITS)
+
+/*
+ * Direction bits (from host perspective).
+ */
+#define _CMD_DIR_NONE 0U
+#define _CMD_DIR_WRITE 1U
+#define _CMD_DIR_READ 2U
+#define _CMD_DIR_RW (_CMD_DIR_WRITE | _CMD_DIR_READ)
+
+/*
+ * Flag bits.
+ */
+#define _CMD_FLAGS_NONE 0U
+#define _CMD_FLAGS_NOWAIT 1U
+
+/*
+ * vNIC type bits.
+ */
+#define _CMD_VTYPE_NONE 0U
+#define _CMD_VTYPE_ENET 1U
+#define _CMD_VTYPE_FC 2U
+#define _CMD_VTYPE_SCSI 4U
+#define _CMD_VTYPE_ALL (_CMD_VTYPE_ENET | _CMD_VTYPE_FC | _CMD_VTYPE_SCSI)
+
+/*
+ * Used to create cmds..
+*/
+#define _CMDCF(dir, flags, vtype, nr) \
+ (((dir) << _CMD_DIRSHIFT) | \
+ ((flags) << _CMD_FLAGSSHIFT) | \
+ ((vtype) << _CMD_VTYPESHIFT) | \
+ ((nr) << _CMD_NSHIFT))
+#define _CMDC(dir, vtype, nr) _CMDCF(dir, 0, vtype, nr)
+#define _CMDCNW(dir, vtype, nr) _CMDCF(dir, _CMD_FLAGS_NOWAIT, vtype, nr)
+
+/*
+ * Used to decode cmds..
+*/
+#define _CMD_DIR(cmd) (((cmd) >> _CMD_DIRSHIFT) & _CMD_DIRMASK)
+#define _CMD_FLAGS(cmd) (((cmd) >> _CMD_FLAGSSHIFT) & _CMD_FLAGSMASK)
+#define _CMD_VTYPE(cmd) (((cmd) >> _CMD_VTYPESHIFT) & _CMD_VTYPEMASK)
+#define _CMD_N(cmd) (((cmd) >> _CMD_NSHIFT) & _CMD_NMASK)
+
+enum vnic_devcmd_cmd {
+ CMD_NONE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_NONE, 0),
+
+ /* mcpu fw info in mem: (u64)a0=paddr to struct vnic_devcmd_fw_info */
+ CMD_MCPU_FW_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 1),
+
+ /* dev-specific block member:
+ * in: (u16)a0=offset,(u8)a1=size
+ * out: a0=value */
+ CMD_DEV_SPEC = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 2),
+
+ /* stats clear */
+ CMD_STATS_CLEAR = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 3),
+
+ /* stats dump in mem: (u64)a0=paddr to stats area,
+ * (u16)a1=sizeof stats area */
+ CMD_STATS_DUMP = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 4),
+
+ /* set Rx packet filter: (u32)a0=filters (see CMD_PFILTER_*) */
+ CMD_PACKET_FILTER = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 7),
+
+ /* hang detection notification */
+ CMD_HANG_NOTIFY = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 8),
+
+ /* MAC address in (u48)a0 */
+ CMD_MAC_ADDR = _CMDC(_CMD_DIR_READ,
+ _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 9),
+
+ /* disable/enable promisc mode: (u8)a0=0/1 */
+/***** XXX DEPRECATED *****/
+ CMD_PROMISC_MODE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 10),
+
+ /* disable/enable all-multi mode: (u8)a0=0/1 */
+/***** XXX DEPRECATED *****/
+ CMD_ALLMULTI_MODE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 11),
+
+ /* add addr from (u48)a0 */
+ CMD_ADDR_ADD = _CMDCNW(_CMD_DIR_WRITE,
+ _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 12),
+
+ /* del addr from (u48)a0 */
+ CMD_ADDR_DEL = _CMDCNW(_CMD_DIR_WRITE,
+ _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 13),
+
+ /* add VLAN id in (u16)a0 */
+ CMD_VLAN_ADD = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 14),
+
+ /* del VLAN id in (u16)a0 */
+ CMD_VLAN_DEL = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 15),
+
+ /* nic_cfg in (u32)a0 */
+ CMD_NIC_CFG = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
+
+ /* union vnic_rss_key in mem: (u64)a0=paddr, (u16)a1=len */
+ CMD_RSS_KEY = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 17),
+
+ /* union vnic_rss_cpu in mem: (u64)a0=paddr, (u16)a1=len */
+ CMD_RSS_CPU = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 18),
+
+ /* initiate softreset */
+ CMD_SOFT_RESET = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 19),
+
+ /* softreset status:
+ * out: a0=0 reset complete, a0=1 reset in progress */
+ CMD_SOFT_RESET_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 20),
+
+ /* set struct vnic_devcmd_notify buffer in mem:
+ * in:
+ * (u64)a0=paddr to notify (set paddr=0 to unset)
+ * (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
+ * (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
+ * out:
+ * (u32)a1 = effective size
+ */
+ CMD_NOTIFY = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21),
+
+ /* UNDI API: (u64)a0=paddr to s_PXENV_UNDI_ struct,
+ * (u8)a1=PXENV_UNDI_xxx */
+ CMD_UNDI = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 22),
+
+ /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */
+ CMD_OPEN = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23),
+
+ /* open status:
+ * out: a0=0 open complete, a0=1 open in progress */
+ CMD_OPEN_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24),
+
+ /* close vnic */
+ CMD_CLOSE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),
+
+ /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
+ CMD_INIT = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
+
+ /* variant of CMD_INIT, with provisioning info
+ * (u64)a0=paddr of vnic_devcmd_provinfo
+ * (u32)a1=sizeof provision info */
+ CMD_INIT_PROV_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 27),
+
+ /* enable virtual link */
+ CMD_ENABLE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),
+
+ /* disable virtual link */
+ CMD_DISABLE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29),
+
+ /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */
+ CMD_STATS_DUMP_ALL = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30),
+
+ /* init status:
+ * out: a0=0 init complete, a0=1 init in progress
+ * if a0=0, a1=errno */
+ CMD_INIT_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31),
+
+ /* INT13 API: (u64)a0=paddr to vnic_int13_params struct
+ * (u8)a1=INT13_CMD_xxx */
+ CMD_INT13 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_FC, 32),
+
+ /* logical uplink enable/disable: (u64)a0: 0/1=disable/enable */
+ CMD_LOGICAL_UPLINK = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 33),
+
+ /* undo initialize of virtual link */
+ CMD_DEINIT = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
+};
+
+/* flags for CMD_OPEN */
+#define CMD_OPENF_OPROM 0x1 /* open coming from option rom */
+
+/* flags for CMD_INIT */
+#define CMD_INITF_DEFAULT_MAC 0x1 /* init with default mac addr */
+
+/* flags for CMD_PACKET_FILTER */
+#define CMD_PFILTER_DIRECTED 0x01
+#define CMD_PFILTER_MULTICAST 0x02
+#define CMD_PFILTER_BROADCAST 0x04
+#define CMD_PFILTER_PROMISCUOUS 0x08
+#define CMD_PFILTER_ALL_MULTICAST 0x10
+
+enum vnic_devcmd_status {
+ STAT_NONE = 0,
+ STAT_BUSY = 1 << 0, /* cmd in progress */
+ STAT_ERROR = 1 << 1, /* last cmd caused error (code in a0) */
+};
+
+enum vnic_devcmd_error {
+ ERR_SUCCESS = 0,
+ ERR_EINVAL = 1,
+ ERR_EFAULT = 2,
+ ERR_EPERM = 3,
+ ERR_EBUSY = 4,
+ ERR_ECMDUNKNOWN = 5,
+ ERR_EBADSTATE = 6,
+ ERR_ENOMEM = 7,
+ ERR_ETIMEDOUT = 8,
+ ERR_ELINKDOWN = 9,
+};
+
+struct vnic_devcmd_fw_info {
+ char fw_version[32];
+ char fw_build[32];
+ char hw_version[32];
+ char hw_serial_number[32];
+};
+
+struct vnic_devcmd_notify {
+ u32 csum; /* checksum over following words */
+
+ u32 link_state; /* link up == 1 */
+ u32 port_speed; /* effective port speed (rate limit) */
+ u32 mtu; /* MTU */
+ u32 msglvl; /* requested driver msg lvl */
+ u32 uif; /* uplink interface */
+ u32 status; /* status bits (see VNIC_STF_*) */
+ u32 error; /* error code (see ERR_*) for first ERR */
+ u32 link_down_cnt; /* running count of link down transitions */
+};
+#define VNIC_STF_FATAL_ERR 0x0001 /* fatal fw error */
+
+struct vnic_devcmd_provinfo {
+ u8 oui[3];
+ u8 type;
+ u8 data[0];
+};
+
+/*
+ * Writing cmd register causes STAT_BUSY to get set in status register.
+ * When cmd completes, STAT_BUSY will be cleared.
+ *
+ * If cmd completed successfully STAT_ERROR will be clear
+ * and args registers contain cmd-specific results.
+ *
+ * If cmd error, STAT_ERROR will be set and args[0] contains error code.
+ *
+ * status register is read-only. While STAT_BUSY is set,
+ * all other register contents are read-only.
+ */
+
+/* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */
+#define VNIC_DEVCMD_NARGS 15
+struct vnic_devcmd {
+ u32 status; /* RO */
+ u32 cmd; /* RW */
+ u64 args[VNIC_DEVCMD_NARGS]; /* RW cmd args (little-endian) */
+};
+
+#endif /* _VNIC_DEVCMD_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+
+void vnic_intr_free(struct vnic_intr *intr)
+{
+ intr->ctrl = NULL;
+}
+
+int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
+ unsigned int index)
+{
+ intr->index = index;
+ intr->vdev = vdev;
+
+ intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
+ if (!intr->ctrl) {
+ printk(KERN_ERR "Failed to hook INTR[%d].ctrl resource\n",
+ index);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
+ unsigned int coalescing_type, unsigned int mask_on_assertion)
+{
+ iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
+ iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
+ iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
+ iowrite32(0, &intr->ctrl->int_credits);
+}
+
+void vnic_intr_clean(struct vnic_intr *intr)
+{
+ iowrite32(0, &intr->ctrl->int_credits);
+}
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_INTR_H_
+#define _VNIC_INTR_H_
+
+#include <linux/pci.h>
+#include "vnic_dev.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_intr_unmask fnic_intr_unmask
+#define vnic_intr_mask fnic_intr_mask
+#define vnic_intr_return_credits fnic_intr_return_credits
+#define vnic_intr_credits fnic_intr_credits
+#define vnic_intr_return_all_credits fnic_intr_return_all_credits
+#define vnic_intr_legacy_pba fnic_intr_legacy_pba
+#define vnic_intr_free fnic_intr_free
+#define vnic_intr_alloc fnic_intr_alloc
+#define vnic_intr_init fnic_intr_init
+#define vnic_intr_clean fnic_intr_clean
+
+#define VNIC_INTR_TIMER_MAX 0xffff
+
+#define VNIC_INTR_TIMER_TYPE_ABS 0
+#define VNIC_INTR_TIMER_TYPE_QUIET 1
+
+/* Interrupt control */
+struct vnic_intr_ctrl {
+ u32 coalescing_timer; /* 0x00 */
+ u32 pad0;
+ u32 coalescing_value; /* 0x08 */
+ u32 pad1;
+ u32 coalescing_type; /* 0x10 */
+ u32 pad2;
+ u32 mask_on_assertion; /* 0x18 */
+ u32 pad3;
+ u32 mask; /* 0x20 */
+ u32 pad4;
+ u32 int_credits; /* 0x28 */
+ u32 pad5;
+ u32 int_credit_return; /* 0x30 */
+ u32 pad6;
+};
+
+struct vnic_intr {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */
+};
+
+static inline void vnic_intr_unmask(struct vnic_intr *intr)
+{
+ iowrite32(0, &intr->ctrl->mask);
+}
+
+static inline void vnic_intr_mask(struct vnic_intr *intr)
+{
+ iowrite32(1, &intr->ctrl->mask);
+}
+
+static inline void vnic_intr_return_credits(struct vnic_intr *intr,
+ unsigned int credits, int unmask, int reset_timer)
+{
+#define VNIC_INTR_UNMASK_SHIFT 16
+#define VNIC_INTR_RESET_TIMER_SHIFT 17
+
+ u32 int_credit_return = (credits & 0xffff) |
+ (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
+ (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
+
+ iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
+}
+
+static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
+{
+ return ioread32(&intr->ctrl->int_credits);
+}
+
+static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)
+{
+ unsigned int credits = vnic_intr_credits(intr);
+ int unmask = 1;
+ int reset_timer = 1;
+
+ vnic_intr_return_credits(intr, credits, unmask, reset_timer);
+}
+
+static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
+{
+ /* read PBA without clearing */
+ return ioread32(legacy_pba);
+}
+
+void vnic_intr_free(struct vnic_intr *intr);
+int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
+ unsigned int index);
+void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
+ unsigned int coalescing_type, unsigned int mask_on_assertion);
+void vnic_intr_clean(struct vnic_intr *intr);
+
+#endif /* _VNIC_INTR_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_NIC_H_
+#define _VNIC_NIC_H_
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_set_nic_cfg fnic_set_nic_cfg
+
+#define NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD 0xffUL
+#define NIC_CFG_RSS_DEFAULT_CPU_SHIFT 0
+#define NIC_CFG_RSS_HASH_TYPE (0xffUL << 8)
+#define NIC_CFG_RSS_HASH_TYPE_MASK_FIELD 0xffUL
+#define NIC_CFG_RSS_HASH_TYPE_SHIFT 8
+#define NIC_CFG_RSS_HASH_BITS (7UL << 16)
+#define NIC_CFG_RSS_HASH_BITS_MASK_FIELD 7UL
+#define NIC_CFG_RSS_HASH_BITS_SHIFT 16
+#define NIC_CFG_RSS_BASE_CPU (7UL << 19)
+#define NIC_CFG_RSS_BASE_CPU_MASK_FIELD 7UL
+#define NIC_CFG_RSS_BASE_CPU_SHIFT 19
+#define NIC_CFG_RSS_ENABLE (1UL << 22)
+#define NIC_CFG_RSS_ENABLE_MASK_FIELD 1UL
+#define NIC_CFG_RSS_ENABLE_SHIFT 22
+#define NIC_CFG_TSO_IPID_SPLIT_EN (1UL << 23)
+#define NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD 1UL
+#define NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT 23
+#define NIC_CFG_IG_VLAN_STRIP_EN (1UL << 24)
+#define NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD 1UL
+#define NIC_CFG_IG_VLAN_STRIP_EN_SHIFT 24
+
+static inline void vnic_set_nic_cfg(u32 *nic_cfg,
+ u8 rss_default_cpu, u8 rss_hash_type,
+ u8 rss_hash_bits, u8 rss_base_cpu,
+ u8 rss_enable, u8 tso_ipid_split_en,
+ u8 ig_vlan_strip_en)
+{
+ *nic_cfg = (rss_default_cpu & NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD) |
+ ((rss_hash_type & NIC_CFG_RSS_HASH_TYPE_MASK_FIELD)
+ << NIC_CFG_RSS_HASH_TYPE_SHIFT) |
+ ((rss_hash_bits & NIC_CFG_RSS_HASH_BITS_MASK_FIELD)
+ << NIC_CFG_RSS_HASH_BITS_SHIFT) |
+ ((rss_base_cpu & NIC_CFG_RSS_BASE_CPU_MASK_FIELD)
+ << NIC_CFG_RSS_BASE_CPU_SHIFT) |
+ ((rss_enable & NIC_CFG_RSS_ENABLE_MASK_FIELD)
+ << NIC_CFG_RSS_ENABLE_SHIFT) |
+ ((tso_ipid_split_en & NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD)
+ << NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT) |
+ ((ig_vlan_strip_en & NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD)
+ << NIC_CFG_IG_VLAN_STRIP_EN_SHIFT);
+}
+
+#endif /* _VNIC_NIC_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_RESOURCE_H_
+#define _VNIC_RESOURCE_H_
+
+#define VNIC_RES_MAGIC 0x766E6963L /* 'vnic' */
+#define VNIC_RES_VERSION 0x00000000L
+
+/* vNIC resource types */
+enum vnic_res_type {
+ RES_TYPE_EOL, /* End-of-list */
+ RES_TYPE_WQ, /* Work queues */
+ RES_TYPE_RQ, /* Receive queues */
+ RES_TYPE_CQ, /* Completion queues */
+ RES_TYPE_RSVD1,
+ RES_TYPE_NIC_CFG, /* Enet NIC config registers */
+ RES_TYPE_RSVD2,
+ RES_TYPE_RSVD3,
+ RES_TYPE_RSVD4,
+ RES_TYPE_RSVD5,
+ RES_TYPE_INTR_CTRL, /* Interrupt ctrl table */
+ RES_TYPE_INTR_TABLE, /* MSI/MSI-X Interrupt table */
+ RES_TYPE_INTR_PBA, /* MSI/MSI-X PBA table */
+ RES_TYPE_INTR_PBA_LEGACY, /* Legacy intr status */
+ RES_TYPE_RSVD6,
+ RES_TYPE_RSVD7,
+ RES_TYPE_DEVCMD, /* Device command region */
+ RES_TYPE_PASS_THRU_PAGE, /* Pass-thru page */
+
+ RES_TYPE_MAX, /* Count of resource types */
+};
+
+struct vnic_resource_header {
+ u32 magic;
+ u32 version;
+};
+
+struct vnic_resource {
+ u8 type;
+ u8 bar;
+ u8 pad[2];
+ u32 bar_offset;
+ u32 count;
+};
+
+#endif /* _VNIC_RESOURCE_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "vnic_dev.h"
+#include "vnic_rq.h"
+
+static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
+{
+ struct vnic_rq_buf *buf;
+ struct vnic_dev *vdev;
+ unsigned int i, j, count = rq->ring.desc_count;
+ unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count);
+
+ vdev = rq->vdev;
+
+ for (i = 0; i < blks; i++) {
+ rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ, GFP_ATOMIC);
+ if (!rq->bufs[i]) {
+ printk(KERN_ERR "Failed to alloc rq_bufs\n");
+ return -ENOMEM;
+ }
+ }
+
+ for (i = 0; i < blks; i++) {
+ buf = rq->bufs[i];
+ for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES; j++) {
+ buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES + j;
+ buf->desc = (u8 *)rq->ring.descs +
+ rq->ring.desc_size * buf->index;
+ if (buf->index + 1 == count) {
+ buf->next = rq->bufs[0];
+ break;
+ } else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES) {
+ buf->next = rq->bufs[i + 1];
+ } else {
+ buf->next = buf + 1;
+ buf++;
+ }
+ }
+ }
+
+ rq->to_use = rq->to_clean = rq->bufs[0];
+ rq->buf_index = 0;
+
+ return 0;
+}
+
+void vnic_rq_free(struct vnic_rq *rq)
+{
+ struct vnic_dev *vdev;
+ unsigned int i;
+
+ vdev = rq->vdev;
+
+ vnic_dev_free_desc_ring(vdev, &rq->ring);
+
+ for (i = 0; i < VNIC_RQ_BUF_BLKS_MAX; i++) {
+ kfree(rq->bufs[i]);
+ rq->bufs[i] = NULL;
+ }
+
+ rq->ctrl = NULL;
+}
+
+int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ int err;
+
+ rq->index = index;
+ rq->vdev = vdev;
+
+ rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
+ if (!rq->ctrl) {
+ printk(KERN_ERR "Failed to hook RQ[%d] resource\n", index);
+ return -EINVAL;
+ }
+
+ vnic_rq_disable(rq);
+
+ err = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size);
+ if (err)
+ return err;
+
+ err = vnic_rq_alloc_bufs(rq);
+ if (err) {
+ vnic_rq_free(rq);
+ return err;
+ }
+
+ return 0;
+}
+
+void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset)
+{
+ u64 paddr;
+ u32 fetch_index;
+
+ paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &rq->ctrl->ring_base);
+ iowrite32(rq->ring.desc_count, &rq->ctrl->ring_size);
+ iowrite32(cq_index, &rq->ctrl->cq_index);
+ iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
+ iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
+ iowrite32(0, &rq->ctrl->dropped_packet_count);
+ iowrite32(0, &rq->ctrl->error_status);
+
+ /* Use current fetch_index as the ring starting point */
+ fetch_index = ioread32(&rq->ctrl->fetch_index);
+ rq->to_use = rq->to_clean =
+ &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
+ [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
+ iowrite32(fetch_index, &rq->ctrl->posted_index);
+
+ rq->buf_index = 0;
+}
+
+unsigned int vnic_rq_error_status(struct vnic_rq *rq)
+{
+ return ioread32(&rq->ctrl->error_status);
+}
+
+void vnic_rq_enable(struct vnic_rq *rq)
+{
+ iowrite32(1, &rq->ctrl->enable);
+}
+
+int vnic_rq_disable(struct vnic_rq *rq)
+{
+ unsigned int wait;
+
+ iowrite32(0, &rq->ctrl->enable);
+
+ /* Wait for HW to ACK disable request */
+ for (wait = 0; wait < 100; wait++) {
+ if (!(ioread32(&rq->ctrl->running)))
+ return 0;
+ udelay(1);
+ }
+
+ printk(KERN_ERR "Failed to disable RQ[%d]\n", rq->index);
+
+ return -ETIMEDOUT;
+}
+
+void vnic_rq_clean(struct vnic_rq *rq,
+ void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf))
+{
+ struct vnic_rq_buf *buf;
+ u32 fetch_index;
+
+ BUG_ON(ioread32(&rq->ctrl->enable));
+
+ buf = rq->to_clean;
+
+ while (vnic_rq_desc_used(rq) > 0) {
+
+ (*buf_clean)(rq, buf);
+
+ buf = rq->to_clean = buf->next;
+ rq->ring.desc_avail++;
+ }
+
+ /* Use current fetch_index as the ring starting point */
+ fetch_index = ioread32(&rq->ctrl->fetch_index);
+ rq->to_use = rq->to_clean =
+ &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
+ [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
+ iowrite32(fetch_index, &rq->ctrl->posted_index);
+
+ rq->buf_index = 0;
+
+ vnic_dev_clear_desc_ring(&rq->ring);
+}
+
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_RQ_H_
+#define _VNIC_RQ_H_
+
+#include <linux/pci.h>
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_rq_desc_avail fnic_rq_desc_avail
+#define vnic_rq_desc_used fnic_rq_desc_used
+#define vnic_rq_next_desc fnic_rq_next_desc
+#define vnic_rq_next_index fnic_rq_next_index
+#define vnic_rq_next_buf_index fnic_rq_next_buf_index
+#define vnic_rq_post fnic_rq_post
+#define vnic_rq_posting_soon fnic_rq_posting_soon
+#define vnic_rq_return_descs fnic_rq_return_descs
+#define vnic_rq_service fnic_rq_service
+#define vnic_rq_fill fnic_rq_fill
+#define vnic_rq_free fnic_rq_free
+#define vnic_rq_alloc fnic_rq_alloc
+#define vnic_rq_init fnic_rq_init
+#define vnic_rq_error_status fnic_rq_error_status
+#define vnic_rq_enable fnic_rq_enable
+#define vnic_rq_disable fnic_rq_disable
+#define vnic_rq_clean fnic_rq_clean
+
+/* Receive queue control */
+struct vnic_rq_ctrl {
+ u64 ring_base; /* 0x00 */
+ u32 ring_size; /* 0x08 */
+ u32 pad0;
+ u32 posted_index; /* 0x10 */
+ u32 pad1;
+ u32 cq_index; /* 0x18 */
+ u32 pad2;
+ u32 enable; /* 0x20 */
+ u32 pad3;
+ u32 running; /* 0x28 */
+ u32 pad4;
+ u32 fetch_index; /* 0x30 */
+ u32 pad5;
+ u32 error_interrupt_enable; /* 0x38 */
+ u32 pad6;
+ u32 error_interrupt_offset; /* 0x40 */
+ u32 pad7;
+ u32 error_status; /* 0x48 */
+ u32 pad8;
+ u32 dropped_packet_count; /* 0x50 */
+ u32 pad9;
+ u32 dropped_packet_count_rc; /* 0x58 */
+ u32 pad10;
+};
+
+/* Break the vnic_rq_buf allocations into blocks of 64 entries */
+#define VNIC_RQ_BUF_BLK_ENTRIES 64
+#define VNIC_RQ_BUF_BLK_SZ \
+ (VNIC_RQ_BUF_BLK_ENTRIES * sizeof(struct vnic_rq_buf))
+#define VNIC_RQ_BUF_BLKS_NEEDED(entries) \
+ DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES)
+#define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096)
+
+struct vnic_rq_buf {
+ struct vnic_rq_buf *next;
+ dma_addr_t dma_addr;
+ void *os_buf;
+ unsigned int os_buf_index;
+ unsigned int len;
+ unsigned int index;
+ void *desc;
+};
+
+struct vnic_rq {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_rq_ctrl __iomem *ctrl; /* memory-mapped */
+ struct vnic_dev_ring ring;
+ struct vnic_rq_buf *bufs[VNIC_RQ_BUF_BLKS_MAX];
+ struct vnic_rq_buf *to_use;
+ struct vnic_rq_buf *to_clean;
+ void *os_buf_head;
+ unsigned int buf_index;
+ unsigned int pkts_outstanding;
+};
+
+static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
+{
+ /* how many does SW own? */
+ return rq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
+{
+ /* how many does HW own? */
+ return rq->ring.desc_count - rq->ring.desc_avail - 1;
+}
+
+static inline void *vnic_rq_next_desc(struct vnic_rq *rq)
+{
+ return rq->to_use->desc;
+}
+
+static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq)
+{
+ return rq->to_use->index;
+}
+
+static inline unsigned int vnic_rq_next_buf_index(struct vnic_rq *rq)
+{
+ return rq->buf_index++;
+}
+
+static inline void vnic_rq_post(struct vnic_rq *rq,
+ void *os_buf, unsigned int os_buf_index,
+ dma_addr_t dma_addr, unsigned int len)
+{
+ struct vnic_rq_buf *buf = rq->to_use;
+
+ buf->os_buf = os_buf;
+ buf->os_buf_index = os_buf_index;
+ buf->dma_addr = dma_addr;
+ buf->len = len;
+
+ buf = buf->next;
+ rq->to_use = buf;
+ rq->ring.desc_avail--;
+
+ /* Move the posted_index every nth descriptor
+ */
+
+#ifndef VNIC_RQ_RETURN_RATE
+#define VNIC_RQ_RETURN_RATE 0xf /* keep 2^n - 1 */
+#endif
+
+ if ((buf->index & VNIC_RQ_RETURN_RATE) == 0) {
+ /* Adding write memory barrier prevents compiler and/or CPU
+ * reordering, thus avoiding descriptor posting before
+ * descriptor is initialized. Otherwise, hardware can read
+ * stale descriptor fields.
+ */
+ wmb();
+ iowrite32(buf->index, &rq->ctrl->posted_index);
+ }
+}
+
+static inline int vnic_rq_posting_soon(struct vnic_rq *rq)
+{
+ return (rq->to_use->index & VNIC_RQ_RETURN_RATE) == 0;
+}
+
+static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count)
+{
+ rq->ring.desc_avail += count;
+}
+
+enum desc_return_options {
+ VNIC_RQ_RETURN_DESC,
+ VNIC_RQ_DEFER_RETURN_DESC,
+};
+
+static inline void vnic_rq_service(struct vnic_rq *rq,
+ struct cq_desc *cq_desc, u16 completed_index,
+ int desc_return, void (*buf_service)(struct vnic_rq *rq,
+ struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
+ int skipped, void *opaque), void *opaque)
+{
+ struct vnic_rq_buf *buf;
+ int skipped;
+
+ buf = rq->to_clean;
+ while (1) {
+
+ skipped = (buf->index != completed_index);
+
+ (*buf_service)(rq, cq_desc, buf, skipped, opaque);
+
+ if (desc_return == VNIC_RQ_RETURN_DESC)
+ rq->ring.desc_avail++;
+
+ rq->to_clean = buf->next;
+
+ if (!skipped)
+ break;
+
+ buf = rq->to_clean;
+ }
+}
+
+static inline int vnic_rq_fill(struct vnic_rq *rq,
+ int (*buf_fill)(struct vnic_rq *rq))
+{
+ int err;
+
+ while (vnic_rq_desc_avail(rq) > 1) {
+
+ err = (*buf_fill)(rq);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+void vnic_rq_free(struct vnic_rq *rq);
+int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset);
+unsigned int vnic_rq_error_status(struct vnic_rq *rq);
+void vnic_rq_enable(struct vnic_rq *rq);
+int vnic_rq_disable(struct vnic_rq *rq);
+void vnic_rq_clean(struct vnic_rq *rq,
+ void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf));
+
+#endif /* _VNIC_RQ_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_SCSI_H_
+#define _VNIC_SCSI_H_
+
+#define VNIC_FNIC_WQ_COPY_COUNT_MIN 1
+#define VNIC_FNIC_WQ_COPY_COUNT_MAX 1
+
+#define VNIC_FNIC_WQ_DESCS_MIN 64
+#define VNIC_FNIC_WQ_DESCS_MAX 128
+
+#define VNIC_FNIC_WQ_COPY_DESCS_MIN 64
+#define VNIC_FNIC_WQ_COPY_DESCS_MAX 512
+
+#define VNIC_FNIC_RQ_DESCS_MIN 64
+#define VNIC_FNIC_RQ_DESCS_MAX 128
+
+#define VNIC_FNIC_EDTOV_MIN 1000
+#define VNIC_FNIC_EDTOV_MAX 255000
+#define VNIC_FNIC_EDTOV_DEF 2000
+
+#define VNIC_FNIC_RATOV_MIN 1000
+#define VNIC_FNIC_RATOV_MAX 255000
+
+#define VNIC_FNIC_MAXDATAFIELDSIZE_MIN 256
+#define VNIC_FNIC_MAXDATAFIELDSIZE_MAX 2112
+
+#define VNIC_FNIC_FLOGI_RETRIES_MIN 0
+#define VNIC_FNIC_FLOGI_RETRIES_MAX 0xffffffff
+#define VNIC_FNIC_FLOGI_RETRIES_DEF 0xffffffff
+
+#define VNIC_FNIC_FLOGI_TIMEOUT_MIN 1000
+#define VNIC_FNIC_FLOGI_TIMEOUT_MAX 255000
+
+#define VNIC_FNIC_PLOGI_RETRIES_MIN 0
+#define VNIC_FNIC_PLOGI_RETRIES_MAX 255
+#define VNIC_FNIC_PLOGI_RETRIES_DEF 8
+
+#define VNIC_FNIC_PLOGI_TIMEOUT_MIN 1000
+#define VNIC_FNIC_PLOGI_TIMEOUT_MAX 255000
+
+#define VNIC_FNIC_IO_THROTTLE_COUNT_MIN 256
+#define VNIC_FNIC_IO_THROTTLE_COUNT_MAX 4096
+
+#define VNIC_FNIC_LINK_DOWN_TIMEOUT_MIN 0
+#define VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX 240000
+
+#define VNIC_FNIC_PORT_DOWN_TIMEOUT_MIN 0
+#define VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX 240000
+
+#define VNIC_FNIC_PORT_DOWN_IO_RETRIES_MIN 0
+#define VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX 255
+
+#define VNIC_FNIC_LUNS_PER_TARGET_MIN 1
+#define VNIC_FNIC_LUNS_PER_TARGET_MAX 1024
+
+/* Device-specific region: scsi configuration */
+struct vnic_fc_config {
+ u64 node_wwn;
+ u64 port_wwn;
+ u32 flags;
+ u32 wq_enet_desc_count;
+ u32 wq_copy_desc_count;
+ u32 rq_desc_count;
+ u32 flogi_retries;
+ u32 flogi_timeout;
+ u32 plogi_retries;
+ u32 plogi_timeout;
+ u32 io_throttle_count;
+ u32 link_down_timeout;
+ u32 port_down_timeout;
+ u32 port_down_io_retries;
+ u32 luns_per_tgt;
+ u16 maxdatafieldsize;
+ u16 ed_tov;
+ u16 ra_tov;
+ u16 intr_timer;
+ u8 intr_timer_type;
+};
+
+#define VFCF_FCP_SEQ_LVL_ERR 0x1 /* Enable FCP-2 Error Recovery */
+#define VFCF_PERBI 0x2 /* persistent binding info available */
+
+#endif /* _VNIC_SCSI_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_STATS_H_
+#define _VNIC_STATS_H_
+
+/* Tx statistics */
+struct vnic_tx_stats {
+ u64 tx_frames_ok;
+ u64 tx_unicast_frames_ok;
+ u64 tx_multicast_frames_ok;
+ u64 tx_broadcast_frames_ok;
+ u64 tx_bytes_ok;
+ u64 tx_unicast_bytes_ok;
+ u64 tx_multicast_bytes_ok;
+ u64 tx_broadcast_bytes_ok;
+ u64 tx_drops;
+ u64 tx_errors;
+ u64 tx_tso;
+ u64 rsvd[16];
+};
+
+/* Rx statistics */
+struct vnic_rx_stats {
+ u64 rx_frames_ok;
+ u64 rx_frames_total;
+ u64 rx_unicast_frames_ok;
+ u64 rx_multicast_frames_ok;
+ u64 rx_broadcast_frames_ok;
+ u64 rx_bytes_ok;
+ u64 rx_unicast_bytes_ok;
+ u64 rx_multicast_bytes_ok;
+ u64 rx_broadcast_bytes_ok;
+ u64 rx_drop;
+ u64 rx_no_bufs;
+ u64 rx_errors;
+ u64 rx_rss;
+ u64 rx_crc_errors;
+ u64 rx_frames_64;
+ u64 rx_frames_127;
+ u64 rx_frames_255;
+ u64 rx_frames_511;
+ u64 rx_frames_1023;
+ u64 rx_frames_1518;
+ u64 rx_frames_to_max;
+ u64 rsvd[16];
+};
+
+struct vnic_stats {
+ struct vnic_tx_stats tx;
+ struct vnic_rx_stats rx;
+};
+
+#endif /* _VNIC_STATS_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+
+static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
+{
+ struct vnic_wq_buf *buf;
+ struct vnic_dev *vdev;
+ unsigned int i, j, count = wq->ring.desc_count;
+ unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
+
+ vdev = wq->vdev;
+
+ for (i = 0; i < blks; i++) {
+ wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC);
+ if (!wq->bufs[i]) {
+ printk(KERN_ERR "Failed to alloc wq_bufs\n");
+ return -ENOMEM;
+ }
+ }
+
+ for (i = 0; i < blks; i++) {
+ buf = wq->bufs[i];
+ for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES; j++) {
+ buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES + j;
+ buf->desc = (u8 *)wq->ring.descs +
+ wq->ring.desc_size * buf->index;
+ if (buf->index + 1 == count) {
+ buf->next = wq->bufs[0];
+ break;
+ } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES) {
+ buf->next = wq->bufs[i + 1];
+ } else {
+ buf->next = buf + 1;
+ buf++;
+ }
+ }
+ }
+
+ wq->to_use = wq->to_clean = wq->bufs[0];
+
+ return 0;
+}
+
+void vnic_wq_free(struct vnic_wq *wq)
+{
+ struct vnic_dev *vdev;
+ unsigned int i;
+
+ vdev = wq->vdev;
+
+ vnic_dev_free_desc_ring(vdev, &wq->ring);
+
+ for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
+ kfree(wq->bufs[i]);
+ wq->bufs[i] = NULL;
+ }
+
+ wq->ctrl = NULL;
+
+}
+
+int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ int err;
+
+ wq->index = index;
+ wq->vdev = vdev;
+
+ wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
+ if (!wq->ctrl) {
+ printk(KERN_ERR "Failed to hook WQ[%d] resource\n", index);
+ return -EINVAL;
+ }
+
+ vnic_wq_disable(wq);
+
+ err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
+ if (err)
+ return err;
+
+ err = vnic_wq_alloc_bufs(wq);
+ if (err) {
+ vnic_wq_free(wq);
+ return err;
+ }
+
+ return 0;
+}
+
+void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset)
+{
+ u64 paddr;
+
+ paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &wq->ctrl->ring_base);
+ iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
+ iowrite32(0, &wq->ctrl->fetch_index);
+ iowrite32(0, &wq->ctrl->posted_index);
+ iowrite32(cq_index, &wq->ctrl->cq_index);
+ iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
+ iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
+ iowrite32(0, &wq->ctrl->error_status);
+}
+
+unsigned int vnic_wq_error_status(struct vnic_wq *wq)
+{
+ return ioread32(&wq->ctrl->error_status);
+}
+
+void vnic_wq_enable(struct vnic_wq *wq)
+{
+ iowrite32(1, &wq->ctrl->enable);
+}
+
+int vnic_wq_disable(struct vnic_wq *wq)
+{
+ unsigned int wait;
+
+ iowrite32(0, &wq->ctrl->enable);
+
+ /* Wait for HW to ACK disable request */
+ for (wait = 0; wait < 100; wait++) {
+ if (!(ioread32(&wq->ctrl->running)))
+ return 0;
+ udelay(1);
+ }
+
+ printk(KERN_ERR "Failed to disable WQ[%d]\n", wq->index);
+
+ return -ETIMEDOUT;
+}
+
+void vnic_wq_clean(struct vnic_wq *wq,
+ void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
+{
+ struct vnic_wq_buf *buf;
+
+ BUG_ON(ioread32(&wq->ctrl->enable));
+
+ buf = wq->to_clean;
+
+ while (vnic_wq_desc_used(wq) > 0) {
+
+ (*buf_clean)(wq, buf);
+
+ buf = wq->to_clean = buf->next;
+ wq->ring.desc_avail++;
+ }
+
+ wq->to_use = wq->to_clean = wq->bufs[0];
+
+ iowrite32(0, &wq->ctrl->fetch_index);
+ iowrite32(0, &wq->ctrl->posted_index);
+ iowrite32(0, &wq->ctrl->error_status);
+
+ vnic_dev_clear_desc_ring(&wq->ring);
+}
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_WQ_H_
+#define _VNIC_WQ_H_
+
+#include <linux/pci.h>
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_wq_desc_avail fnic_wq_desc_avail
+#define vnic_wq_desc_used fnic_wq_desc_used
+#define vnic_wq_next_desc fni_cwq_next_desc
+#define vnic_wq_post fnic_wq_post
+#define vnic_wq_service fnic_wq_service
+#define vnic_wq_free fnic_wq_free
+#define vnic_wq_alloc fnic_wq_alloc
+#define vnic_wq_init fnic_wq_init
+#define vnic_wq_error_status fnic_wq_error_status
+#define vnic_wq_enable fnic_wq_enable
+#define vnic_wq_disable fnic_wq_disable
+#define vnic_wq_clean fnic_wq_clean
+
+/* Work queue control */
+struct vnic_wq_ctrl {
+ u64 ring_base; /* 0x00 */
+ u32 ring_size; /* 0x08 */
+ u32 pad0;
+ u32 posted_index; /* 0x10 */
+ u32 pad1;
+ u32 cq_index; /* 0x18 */
+ u32 pad2;
+ u32 enable; /* 0x20 */
+ u32 pad3;
+ u32 running; /* 0x28 */
+ u32 pad4;
+ u32 fetch_index; /* 0x30 */
+ u32 pad5;
+ u32 dca_value; /* 0x38 */
+ u32 pad6;
+ u32 error_interrupt_enable; /* 0x40 */
+ u32 pad7;
+ u32 error_interrupt_offset; /* 0x48 */
+ u32 pad8;
+ u32 error_status; /* 0x50 */
+ u32 pad9;
+};
+
+struct vnic_wq_buf {
+ struct vnic_wq_buf *next;
+ dma_addr_t dma_addr;
+ void *os_buf;
+ unsigned int len;
+ unsigned int index;
+ int sop;
+ void *desc;
+};
+
+/* Break the vnic_wq_buf allocations into blocks of 64 entries */
+#define VNIC_WQ_BUF_BLK_ENTRIES 64
+#define VNIC_WQ_BUF_BLK_SZ \
+ (VNIC_WQ_BUF_BLK_ENTRIES * sizeof(struct vnic_wq_buf))
+#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \
+ DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES)
+#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096)
+
+struct vnic_wq {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */
+ struct vnic_dev_ring ring;
+ struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX];
+ struct vnic_wq_buf *to_use;
+ struct vnic_wq_buf *to_clean;
+ unsigned int pkts_outstanding;
+};
+
+static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq)
+{
+ /* how many does SW own? */
+ return wq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_wq_desc_used(struct vnic_wq *wq)
+{
+ /* how many does HW own? */
+ return wq->ring.desc_count - wq->ring.desc_avail - 1;
+}
+
+static inline void *vnic_wq_next_desc(struct vnic_wq *wq)
+{
+ return wq->to_use->desc;
+}
+
+static inline void vnic_wq_post(struct vnic_wq *wq,
+ void *os_buf, dma_addr_t dma_addr,
+ unsigned int len, int sop, int eop)
+{
+ struct vnic_wq_buf *buf = wq->to_use;
+
+ buf->sop = sop;
+ buf->os_buf = eop ? os_buf : NULL;
+ buf->dma_addr = dma_addr;
+ buf->len = len;
+
+ buf = buf->next;
+ if (eop) {
+ /* Adding write memory barrier prevents compiler and/or CPU
+ * reordering, thus avoiding descriptor posting before
+ * descriptor is initialized. Otherwise, hardware can read
+ * stale descriptor fields.
+ */
+ wmb();
+ iowrite32(buf->index, &wq->ctrl->posted_index);
+ }
+ wq->to_use = buf;
+
+ wq->ring.desc_avail--;
+}
+
+static inline void vnic_wq_service(struct vnic_wq *wq,
+ struct cq_desc *cq_desc, u16 completed_index,
+ void (*buf_service)(struct vnic_wq *wq,
+ struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque),
+ void *opaque)
+{
+ struct vnic_wq_buf *buf;
+
+ buf = wq->to_clean;
+ while (1) {
+
+ (*buf_service)(wq, cq_desc, buf, opaque);
+
+ wq->ring.desc_avail++;
+
+ wq->to_clean = buf->next;
+
+ if (buf->index == completed_index)
+ break;
+
+ buf = wq->to_clean;
+ }
+}
+
+void vnic_wq_free(struct vnic_wq *wq);
+int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset);
+unsigned int vnic_wq_error_status(struct vnic_wq *wq);
+void vnic_wq_enable(struct vnic_wq *wq);
+int vnic_wq_disable(struct vnic_wq *wq);
+void vnic_wq_clean(struct vnic_wq *wq,
+ void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf));
+
+#endif /* _VNIC_WQ_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "vnic_wq_copy.h"
+
+void vnic_wq_copy_enable(struct vnic_wq_copy *wq)
+{
+ iowrite32(1, &wq->ctrl->enable);
+}
+
+int vnic_wq_copy_disable(struct vnic_wq_copy *wq)
+{
+ unsigned int wait;
+
+ iowrite32(0, &wq->ctrl->enable);
+
+ /* Wait for HW to ACK disable request */
+ for (wait = 0; wait < 100; wait++) {
+ if (!(ioread32(&wq->ctrl->running)))
+ return 0;
+ udelay(1);
+ }
+
+ printk(KERN_ERR "Failed to disable Copy WQ[%d],"
+ " fetch index=%d, posted_index=%d\n",
+ wq->index, ioread32(&wq->ctrl->fetch_index),
+ ioread32(&wq->ctrl->posted_index));
+
+ return -ENODEV;
+}
+
+void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
+ void (*q_clean)(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *wq_desc))
+{
+ BUG_ON(ioread32(&wq->ctrl->enable));
+
+ if (vnic_wq_copy_desc_in_use(wq))
+ vnic_wq_copy_service(wq, -1, q_clean);
+
+ wq->to_use_index = wq->to_clean_index = 0;
+
+ iowrite32(0, &wq->ctrl->fetch_index);
+ iowrite32(0, &wq->ctrl->posted_index);
+ iowrite32(0, &wq->ctrl->error_status);
+
+ vnic_dev_clear_desc_ring(&wq->ring);
+}
+
+void vnic_wq_copy_free(struct vnic_wq_copy *wq)
+{
+ struct vnic_dev *vdev;
+
+ vdev = wq->vdev;
+ vnic_dev_free_desc_ring(vdev, &wq->ring);
+ wq->ctrl = NULL;
+}
+
+int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
+ unsigned int index, unsigned int desc_count,
+ unsigned int desc_size)
+{
+ int err;
+
+ wq->index = index;
+ wq->vdev = vdev;
+ wq->to_use_index = wq->to_clean_index = 0;
+ wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
+ if (!wq->ctrl) {
+ printk(KERN_ERR "Failed to hook COPY WQ[%d] resource\n", index);
+ return -EINVAL;
+ }
+
+ vnic_wq_copy_disable(wq);
+
+ err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset)
+{
+ u64 paddr;
+
+ paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &wq->ctrl->ring_base);
+ iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
+ iowrite32(0, &wq->ctrl->fetch_index);
+ iowrite32(0, &wq->ctrl->posted_index);
+ iowrite32(cq_index, &wq->ctrl->cq_index);
+ iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
+ iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
+}
+
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_WQ_COPY_H_
+#define _VNIC_WQ_COPY_H_
+
+#include <linux/pci.h>
+#include "vnic_wq.h"
+#include "fcpio.h"
+
+#define VNIC_WQ_COPY_MAX 1
+
+struct vnic_wq_copy {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */
+ struct vnic_dev_ring ring;
+ unsigned to_use_index;
+ unsigned to_clean_index;
+};
+
+static inline unsigned int vnic_wq_copy_desc_avail(struct vnic_wq_copy *wq)
+{
+ return wq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_wq_copy_desc_in_use(struct vnic_wq_copy *wq)
+{
+ return wq->ring.desc_count - 1 - wq->ring.desc_avail;
+}
+
+static inline void *vnic_wq_copy_next_desc(struct vnic_wq_copy *wq)
+{
+ struct fcpio_host_req *desc = wq->ring.descs;
+ return &desc[wq->to_use_index];
+}
+
+static inline void vnic_wq_copy_post(struct vnic_wq_copy *wq)
+{
+
+ ((wq->to_use_index + 1) == wq->ring.desc_count) ?
+ (wq->to_use_index = 0) : (wq->to_use_index++);
+ wq->ring.desc_avail--;
+
+ /* Adding write memory barrier prevents compiler and/or CPU
+ * reordering, thus avoiding descriptor posting before
+ * descriptor is initialized. Otherwise, hardware can read
+ * stale descriptor fields.
+ */
+ wmb();
+
+ iowrite32(wq->to_use_index, &wq->ctrl->posted_index);
+}
+
+static inline void vnic_wq_copy_desc_process(struct vnic_wq_copy *wq, u16 index)
+{
+ unsigned int cnt;
+
+ if (wq->to_clean_index <= index)
+ cnt = (index - wq->to_clean_index) + 1;
+ else
+ cnt = wq->ring.desc_count - wq->to_clean_index + index + 1;
+
+ wq->to_clean_index = ((index + 1) % wq->ring.desc_count);
+ wq->ring.desc_avail += cnt;
+
+}
+
+static inline void vnic_wq_copy_service(struct vnic_wq_copy *wq,
+ u16 completed_index,
+ void (*q_service)(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *wq_desc))
+{
+ struct fcpio_host_req *wq_desc = wq->ring.descs;
+ unsigned int curr_index;
+
+ while (1) {
+
+ if (q_service)
+ (*q_service)(wq, &wq_desc[wq->to_clean_index]);
+
+ wq->ring.desc_avail++;
+
+ curr_index = wq->to_clean_index;
+
+ /* increment the to-clean index so that we start
+ * with an unprocessed index next time we enter the loop
+ */
+ ((wq->to_clean_index + 1) == wq->ring.desc_count) ?
+ (wq->to_clean_index = 0) : (wq->to_clean_index++);
+
+ if (curr_index == completed_index)
+ break;
+
+ /* we have cleaned all the entries */
+ if ((completed_index == (u16)-1) &&
+ (wq->to_clean_index == wq->to_use_index))
+ break;
+ }
+}
+
+void vnic_wq_copy_enable(struct vnic_wq_copy *wq);
+int vnic_wq_copy_disable(struct vnic_wq_copy *wq);
+void vnic_wq_copy_free(struct vnic_wq_copy *wq);
+int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
+ unsigned int index, unsigned int desc_count, unsigned int desc_size);
+void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset);
+void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
+ void (*q_clean)(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *wq_desc));
+
+#endif /* _VNIC_WQ_COPY_H_ */
--- /dev/null
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _WQ_ENET_DESC_H_
+#define _WQ_ENET_DESC_H_
+
+/* Ethernet work queue descriptor: 16B */
+struct wq_enet_desc {
+ __le64 address;
+ __le16 length;
+ __le16 mss_loopback;
+ __le16 header_length_flags;
+ __le16 vlan_tag;
+};
+
+#define WQ_ENET_ADDR_BITS 64
+#define WQ_ENET_LEN_BITS 14
+#define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
+#define WQ_ENET_MSS_BITS 14
+#define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
+#define WQ_ENET_MSS_SHIFT 2
+#define WQ_ENET_LOOPBACK_SHIFT 1
+#define WQ_ENET_HDRLEN_BITS 10
+#define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
+#define WQ_ENET_FLAGS_OM_BITS 2
+#define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
+#define WQ_ENET_FLAGS_EOP_SHIFT 12
+#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
+#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
+#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
+
+#define WQ_ENET_OFFLOAD_MODE_CSUM 0
+#define WQ_ENET_OFFLOAD_MODE_RESERVED 1
+#define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
+#define WQ_ENET_OFFLOAD_MODE_TSO 3
+
+static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
+ u64 address, u16 length, u16 mss, u16 header_length,
+ u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
+ u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
+{
+ desc->address = cpu_to_le64(address);
+ desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
+ desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
+ WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
+ desc->header_length_flags = cpu_to_le16(
+ (header_length & WQ_ENET_HDRLEN_MASK) |
+ (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
+ (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
+ (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
+ (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
+ (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
+ desc->vlan_tag = cpu_to_le16(vlan_tag);
+}
+
+static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
+ u64 *address, u16 *length, u16 *mss, u16 *header_length,
+ u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
+ u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
+{
+ *address = le64_to_cpu(desc->address);
+ *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
+ *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
+ WQ_ENET_MSS_MASK;
+ *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
+ WQ_ENET_LOOPBACK_SHIFT) & 1);
+ *header_length = le16_to_cpu(desc->header_length_flags) &
+ WQ_ENET_HDRLEN_MASK;
+ *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
+ *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_FLAGS_EOP_SHIFT) & 1);
+ *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
+ *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
+ *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
+ *vlan_tag = le16_to_cpu(desc->vlan_tag);
+}
+
+#endif /* _WQ_ENET_DESC_H_ */
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff