-/******************************************************************************
- * QLOGIC LINUX SOFTWARE
+/*
+ * QLogic Fibre Channel HBA Driver
+ * Copyright (c) 2003-2008 QLogic Corporation
*
- * QLogic ISP2x00 device driver for Linux 2.6.x
- * Copyright (C) 2003-2004 QLogic Corporation
- * (www.qlogic.com)
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- ******************************************************************************/
-
+ * See LICENSE.qla2xxx for copyright and licensing details.
+ */
#include "qla_def.h"
#include <linux/blkdev.h>
#include <scsi/scsi_tcq.h>
-static inline uint16_t qla2x00_get_cmd_direction(struct scsi_cmnd *cmd);
-static inline cont_entry_t *qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *);
-static inline cont_a64_entry_t *qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *);
static request_t *qla2x00_req_pkt(scsi_qla_host_t *ha);
+static void qla2x00_isp_cmd(scsi_qla_host_t *ha);
/**
* qla2x00_get_cmd_direction() - Determine control_flag data direction.
uint32_t *cur_dsd;
scsi_qla_host_t *ha;
struct scsi_cmnd *cmd;
+ struct scatterlist *sg;
+ int i;
cmd = sp->cmd;
__constant_cpu_to_le32(COMMAND_TYPE);
/* No data transfer */
- if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) {
+ if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
cmd_pkt->byte_count = __constant_cpu_to_le32(0);
return;
}
cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
/* Load data segments */
- if (cmd->use_sg != 0) {
- struct scatterlist *cur_seg;
- struct scatterlist *end_seg;
-
- cur_seg = (struct scatterlist *)cmd->request_buffer;
- end_seg = cur_seg + tot_dsds;
- while (cur_seg < end_seg) {
- cont_entry_t *cont_pkt;
-
- /* Allocate additional continuation packets? */
- if (avail_dsds == 0) {
- /*
- * Seven DSDs are available in the Continuation
- * Type 0 IOCB.
- */
- cont_pkt = qla2x00_prep_cont_type0_iocb(ha);
- cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address;
- avail_dsds = 7;
- }
-
- *cur_dsd++ = cpu_to_le32(sg_dma_address(cur_seg));
- *cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
- avail_dsds--;
-
- cur_seg++;
+ scsi_for_each_sg(cmd, sg, tot_dsds, i) {
+ cont_entry_t *cont_pkt;
+
+ /* Allocate additional continuation packets? */
+ if (avail_dsds == 0) {
+ /*
+ * Seven DSDs are available in the Continuation
+ * Type 0 IOCB.
+ */
+ cont_pkt = qla2x00_prep_cont_type0_iocb(ha);
+ cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address;
+ avail_dsds = 7;
}
- } else {
- dma_addr_t req_dma;
- struct page *page;
- unsigned long offset;
- page = virt_to_page(cmd->request_buffer);
- offset = ((unsigned long)cmd->request_buffer & ~PAGE_MASK);
- req_dma = pci_map_page(ha->pdev, page, offset,
- cmd->request_bufflen, cmd->sc_data_direction);
-
- sp->dma_handle = req_dma;
-
- *cur_dsd++ = cpu_to_le32(req_dma);
- *cur_dsd++ = cpu_to_le32(cmd->request_bufflen);
+ *cur_dsd++ = cpu_to_le32(sg_dma_address(sg));
+ *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
+ avail_dsds--;
}
}
uint32_t *cur_dsd;
scsi_qla_host_t *ha;
struct scsi_cmnd *cmd;
+ struct scatterlist *sg;
+ int i;
cmd = sp->cmd;
__constant_cpu_to_le32(COMMAND_A64_TYPE);
/* No data transfer */
- if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) {
+ if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
cmd_pkt->byte_count = __constant_cpu_to_le32(0);
return;
}
cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
/* Load data segments */
- if (cmd->use_sg != 0) {
- struct scatterlist *cur_seg;
- struct scatterlist *end_seg;
-
- cur_seg = (struct scatterlist *)cmd->request_buffer;
- end_seg = cur_seg + tot_dsds;
- while (cur_seg < end_seg) {
- dma_addr_t sle_dma;
- cont_a64_entry_t *cont_pkt;
-
- /* Allocate additional continuation packets? */
- if (avail_dsds == 0) {
- /*
- * Five DSDs are available in the Continuation
- * Type 1 IOCB.
- */
- cont_pkt = qla2x00_prep_cont_type1_iocb(ha);
- cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
- avail_dsds = 5;
- }
-
- sle_dma = sg_dma_address(cur_seg);
- *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
- *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
- *cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
- avail_dsds--;
-
- cur_seg++;
+ scsi_for_each_sg(cmd, sg, tot_dsds, i) {
+ dma_addr_t sle_dma;
+ cont_a64_entry_t *cont_pkt;
+
+ /* Allocate additional continuation packets? */
+ if (avail_dsds == 0) {
+ /*
+ * Five DSDs are available in the Continuation
+ * Type 1 IOCB.
+ */
+ cont_pkt = qla2x00_prep_cont_type1_iocb(ha);
+ cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
+ avail_dsds = 5;
}
- } else {
- dma_addr_t req_dma;
- struct page *page;
- unsigned long offset;
-
- page = virt_to_page(cmd->request_buffer);
- offset = ((unsigned long)cmd->request_buffer & ~PAGE_MASK);
- req_dma = pci_map_page(ha->pdev, page, offset,
- cmd->request_bufflen, cmd->sc_data_direction);
-
- sp->dma_handle = req_dma;
- *cur_dsd++ = cpu_to_le32(LSD(req_dma));
- *cur_dsd++ = cpu_to_le32(MSD(req_dma));
- *cur_dsd++ = cpu_to_le32(cmd->request_bufflen);
+ sle_dma = sg_dma_address(sg);
+ *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
+ avail_dsds--;
}
}
int
qla2x00_start_scsi(srb_t *sp)
{
- int ret;
+ int ret, nseg;
unsigned long flags;
- scsi_qla_host_t *ha;
+ scsi_qla_host_t *ha, *pha;
struct scsi_cmnd *cmd;
uint32_t *clr_ptr;
uint32_t index;
uint32_t handle;
cmd_entry_t *cmd_pkt;
- struct scatterlist *sg;
uint16_t cnt;
uint16_t req_cnt;
uint16_t tot_dsds;
- device_reg_t __iomem *reg;
- char tag[2];
+ struct device_reg_2xxx __iomem *reg;
/* Setup device pointers. */
ret = 0;
ha = sp->ha;
- reg = ha->iobase;
+ pha = to_qla_parent(ha);
+ reg = &ha->iobase->isp;
cmd = sp->cmd;
+ /* So we know we haven't pci_map'ed anything yet */
+ tot_dsds = 0;
/* Send marker if required */
if (ha->marker_needed != 0) {
}
/* Acquire ring specific lock */
- spin_lock_irqsave(&ha->hardware_lock, flags);
+ spin_lock_irqsave(&pha->hardware_lock, flags);
/* Check for room in outstanding command list. */
handle = ha->current_outstanding_cmd;
handle++;
if (handle == MAX_OUTSTANDING_COMMANDS)
handle = 1;
- if (ha->outstanding_cmds[handle] == 0)
+ if (!ha->outstanding_cmds[handle])
break;
}
if (index == MAX_OUTSTANDING_COMMANDS)
goto queuing_error;
+ /* Map the sg table so we have an accurate count of sg entries needed */
+ if (scsi_sg_count(cmd)) {
+ nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
+ scsi_sg_count(cmd), cmd->sc_data_direction);
+ if (unlikely(!nseg))
+ goto queuing_error;
+ } else
+ nseg = 0;
+
+ tot_dsds = nseg;
+
/* Calculate the number of request entries needed. */
- req_cnt = (ha->calc_request_entries)(cmd->request->nr_hw_segments);
+ req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
if (ha->req_q_cnt < (req_cnt + 2)) {
cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg));
if (ha->req_ring_index < cnt)
if (ha->req_q_cnt < (req_cnt + 2))
goto queuing_error;
- /* Finally, we have enough space, now perform mappings. */
- tot_dsds = 0;
- if (cmd->use_sg) {
- sg = (struct scatterlist *) cmd->request_buffer;
- tot_dsds = pci_map_sg(ha->pdev, sg, cmd->use_sg,
- cmd->sc_data_direction);
- if (tot_dsds == 0)
- goto queuing_error;
- } else if (cmd->request_bufflen) {
- tot_dsds++;
- }
- req_cnt = (ha->calc_request_entries)(tot_dsds);
-
/* Build command packet */
ha->current_outstanding_cmd = handle;
ha->outstanding_cmds[handle] = sp;
/* Update tagged queuing modifier */
cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG);
- if (scsi_populate_tag_msg(cmd, tag)) {
- switch (tag[0]) {
- case MSG_HEAD_TAG:
- cmd_pkt->control_flags =
- __constant_cpu_to_le16(CF_HEAD_TAG);
- break;
- case MSG_ORDERED_TAG:
- cmd_pkt->control_flags =
- __constant_cpu_to_le16(CF_ORDERED_TAG);
- break;
- }
- }
/* Load SCSI command packet. */
memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
- cmd_pkt->byte_count = cpu_to_le32((uint32_t)cmd->request_bufflen);
+ cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
/* Build IOCB segments */
- (ha->build_scsi_iocbs)(sp, cmd_pkt, tot_dsds);
+ ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
/* Set total data segment count. */
cmd_pkt->entry_count = (uint8_t)req_cnt;
} else
ha->request_ring_ptr++;
- ha->actthreads++;
- ha->total_ios++;
sp->flags |= SRB_DMA_VALID;
- sp->state = SRB_ACTIVE_STATE;
- sp->u_start = jiffies;
/* Set chip new ring index. */
WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index);
RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
- spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ /* Manage unprocessed RIO/ZIO commands in response queue. */
+ if (ha->flags.process_response_queue &&
+ ha->response_ring_ptr->signature != RESPONSE_PROCESSED)
+ qla2x00_process_response_queue(ha);
+
+ spin_unlock_irqrestore(&pha->hardware_lock, flags);
return (QLA_SUCCESS);
queuing_error:
- spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ if (tot_dsds)
+ scsi_dma_unmap(cmd);
+
+ spin_unlock_irqrestore(&pha->hardware_lock, flags);
return (QLA_FUNCTION_FAILED);
}
__qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,
uint8_t type)
{
- mrk_entry_t *pkt;
+ mrk_entry_t *mrk;
+ struct mrk_entry_24xx *mrk24;
+ scsi_qla_host_t *pha = to_qla_parent(ha);
- pkt = (mrk_entry_t *)qla2x00_req_pkt(ha);
- if (pkt == NULL) {
- DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__));
+ mrk24 = NULL;
+ mrk = (mrk_entry_t *)qla2x00_req_pkt(pha);
+ if (mrk == NULL) {
+ DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n",
+ __func__, ha->host_no));
return (QLA_FUNCTION_FAILED);
}
- pkt->entry_type = MARKER_TYPE;
- pkt->modifier = type;
-
+ mrk->entry_type = MARKER_TYPE;
+ mrk->modifier = type;
if (type != MK_SYNC_ALL) {
- pkt->lun = cpu_to_le16(lun);
- SET_TARGET_ID(ha, pkt->target, loop_id);
+ if (IS_FWI2_CAPABLE(ha)) {
+ mrk24 = (struct mrk_entry_24xx *) mrk;
+ mrk24->nport_handle = cpu_to_le16(loop_id);
+ mrk24->lun[1] = LSB(lun);
+ mrk24->lun[2] = MSB(lun);
+ host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
+ mrk24->vp_index = ha->vp_idx;
+ } else {
+ SET_TARGET_ID(ha, mrk->target, loop_id);
+ mrk->lun = cpu_to_le16(lun);
+ }
}
wmb();
- /* Issue command to ISP */
- qla2x00_isp_cmd(ha);
+ qla2x00_isp_cmd(pha);
return (QLA_SUCCESS);
}
-int
+int
qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,
uint8_t type)
{
int ret;
unsigned long flags = 0;
+ scsi_qla_host_t *pha = to_qla_parent(ha);
- spin_lock_irqsave(&ha->hardware_lock, flags);
+ spin_lock_irqsave(&pha->hardware_lock, flags);
ret = __qla2x00_marker(ha, loop_id, lun, type);
- spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ spin_unlock_irqrestore(&pha->hardware_lock, flags);
return (ret);
}
for (timer = HZ; timer; timer--) {
if ((req_cnt + 2) >= ha->req_q_cnt) {
/* Calculate number of free request entries. */
- cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
+ if (IS_FWI2_CAPABLE(ha))
+ cnt = (uint16_t)RD_REG_DWORD(
+ ®->isp24.req_q_out);
+ else
+ cnt = qla2x00_debounce_register(
+ ISP_REQ_Q_OUT(ha, ®->isp));
if (ha->req_ring_index < cnt)
ha->req_q_cnt = cnt - ha->req_ring_index;
else
/* Check for pending interrupts. */
/* During init we issue marker directly */
- if (!ha->marker_needed)
+ if (!ha->marker_needed && !ha->flags.init_done)
qla2x00_poll(ha);
spin_lock_irq(&ha->hardware_lock);
*
* Note: The caller must hold the hardware lock before calling this routine.
*/
-void
+static void
qla2x00_isp_cmd(scsi_qla_host_t *ha)
{
device_reg_t __iomem *reg = ha->iobase;
ha->request_ring_ptr++;
/* Set chip new ring index. */
- WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index);
- RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
+ if (IS_FWI2_CAPABLE(ha)) {
+ WRT_REG_DWORD(®->isp24.req_q_in, ha->req_ring_index);
+ RD_REG_DWORD_RELAXED(®->isp24.req_q_in);
+ } else {
+ WRT_REG_WORD(ISP_REQ_Q_IN(ha, ®->isp), ha->req_ring_index);
+ RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, ®->isp));
+ }
+
+}
+
+/**
+ * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
+ * Continuation Type 1 IOCBs to allocate.
+ *
+ * @dsds: number of data segment decriptors needed
+ *
+ * Returns the number of IOCB entries needed to store @dsds.
+ */
+static inline uint16_t
+qla24xx_calc_iocbs(uint16_t dsds)
+{
+ uint16_t iocbs;
+
+ iocbs = 1;
+ if (dsds > 1) {
+ iocbs += (dsds - 1) / 5;
+ if ((dsds - 1) % 5)
+ iocbs++;
+ }
+ return iocbs;
+}
+
+/**
+ * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
+ * IOCB types.
+ *
+ * @sp: SRB command to process
+ * @cmd_pkt: Command type 3 IOCB
+ * @tot_dsds: Total number of segments to transfer
+ */
+static inline void
+qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
+ uint16_t tot_dsds)
+{
+ uint16_t avail_dsds;
+ uint32_t *cur_dsd;
+ scsi_qla_host_t *ha;
+ struct scsi_cmnd *cmd;
+ struct scatterlist *sg;
+ int i;
+
+ cmd = sp->cmd;
+
+ /* Update entry type to indicate Command Type 3 IOCB */
+ *((uint32_t *)(&cmd_pkt->entry_type)) =
+ __constant_cpu_to_le32(COMMAND_TYPE_7);
+
+ /* No data transfer */
+ if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
+ cmd_pkt->byte_count = __constant_cpu_to_le32(0);
+ return;
+ }
+
+ ha = sp->ha;
+
+ /* Set transfer direction */
+ if (cmd->sc_data_direction == DMA_TO_DEVICE)
+ cmd_pkt->task_mgmt_flags =
+ __constant_cpu_to_le16(TMF_WRITE_DATA);
+ else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
+ cmd_pkt->task_mgmt_flags =
+ __constant_cpu_to_le16(TMF_READ_DATA);
+
+ /* One DSD is available in the Command Type 3 IOCB */
+ avail_dsds = 1;
+ cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
+
+ /* Load data segments */
+
+ scsi_for_each_sg(cmd, sg, tot_dsds, i) {
+ dma_addr_t sle_dma;
+ cont_a64_entry_t *cont_pkt;
+
+ /* Allocate additional continuation packets? */
+ if (avail_dsds == 0) {
+ /*
+ * Five DSDs are available in the Continuation
+ * Type 1 IOCB.
+ */
+ cont_pkt = qla2x00_prep_cont_type1_iocb(ha);
+ cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
+ avail_dsds = 5;
+ }
+
+ sle_dma = sg_dma_address(sg);
+ *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
+ avail_dsds--;
+ }
+}
+
+
+/**
+ * qla24xx_start_scsi() - Send a SCSI command to the ISP
+ * @sp: command to send to the ISP
+ *
+ * Returns non-zero if a failure occured, else zero.
+ */
+int
+qla24xx_start_scsi(srb_t *sp)
+{
+ int ret, nseg;
+ unsigned long flags;
+ scsi_qla_host_t *ha, *pha;
+ struct scsi_cmnd *cmd;
+ uint32_t *clr_ptr;
+ uint32_t index;
+ uint32_t handle;
+ struct cmd_type_7 *cmd_pkt;
+ uint16_t cnt;
+ uint16_t req_cnt;
+ uint16_t tot_dsds;
+ struct device_reg_24xx __iomem *reg;
+
+ /* Setup device pointers. */
+ ret = 0;
+ ha = sp->ha;
+ pha = to_qla_parent(ha);
+ reg = &ha->iobase->isp24;
+ cmd = sp->cmd;
+ /* So we know we haven't pci_map'ed anything yet */
+ tot_dsds = 0;
+
+ /* Send marker if required */
+ if (ha->marker_needed != 0) {
+ if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
+ return QLA_FUNCTION_FAILED;
+ }
+ ha->marker_needed = 0;
+ }
+
+ /* Acquire ring specific lock */
+ spin_lock_irqsave(&pha->hardware_lock, flags);
+
+ /* Check for room in outstanding command list. */
+ handle = ha->current_outstanding_cmd;
+ for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
+ handle++;
+ if (handle == MAX_OUTSTANDING_COMMANDS)
+ handle = 1;
+ if (!ha->outstanding_cmds[handle])
+ break;
+ }
+ if (index == MAX_OUTSTANDING_COMMANDS)
+ goto queuing_error;
+
+ /* Map the sg table so we have an accurate count of sg entries needed */
+ if (scsi_sg_count(cmd)) {
+ nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
+ scsi_sg_count(cmd), cmd->sc_data_direction);
+ if (unlikely(!nseg))
+ goto queuing_error;
+ } else
+ nseg = 0;
+
+ tot_dsds = nseg;
+
+ req_cnt = qla24xx_calc_iocbs(tot_dsds);
+ if (ha->req_q_cnt < (req_cnt + 2)) {
+ cnt = (uint16_t)RD_REG_DWORD_RELAXED(®->req_q_out);
+ if (ha->req_ring_index < cnt)
+ ha->req_q_cnt = cnt - ha->req_ring_index;
+ else
+ ha->req_q_cnt = ha->request_q_length -
+ (ha->req_ring_index - cnt);
+ }
+ if (ha->req_q_cnt < (req_cnt + 2))
+ goto queuing_error;
+
+ /* Build command packet. */
+ ha->current_outstanding_cmd = handle;
+ ha->outstanding_cmds[handle] = sp;
+ sp->ha = ha;
+ sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle;
+ ha->req_q_cnt -= req_cnt;
+
+ cmd_pkt = (struct cmd_type_7 *)ha->request_ring_ptr;
+ cmd_pkt->handle = handle;
+
+ /* Zero out remaining portion of packet. */
+ /* tagged queuing modifier -- default is TSK_SIMPLE (0). */
+ clr_ptr = (uint32_t *)cmd_pkt + 2;
+ memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
+ cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
+
+ /* Set NPORT-ID and LUN number*/
+ cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+ cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
+ cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
+ cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
+ cmd_pkt->vp_index = sp->fcport->vp_idx;
+
+ int_to_scsilun(sp->cmd->device->lun, &cmd_pkt->lun);
+ host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
+
+ /* Load SCSI command packet. */
+ memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
+ host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
+
+ cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
+
+ /* Build IOCB segments */
+ qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds);
+
+ /* Set total data segment count. */
+ cmd_pkt->entry_count = (uint8_t)req_cnt;
+ wmb();
+
+ /* Adjust ring index. */
+ ha->req_ring_index++;
+ if (ha->req_ring_index == ha->request_q_length) {
+ ha->req_ring_index = 0;
+ ha->request_ring_ptr = ha->request_ring;
+ } else
+ ha->request_ring_ptr++;
+
+ sp->flags |= SRB_DMA_VALID;
+
+ /* Set chip new ring index. */
+ WRT_REG_DWORD(®->req_q_in, ha->req_ring_index);
+ RD_REG_DWORD_RELAXED(®->req_q_in); /* PCI Posting. */
+
+ /* Manage unprocessed RIO/ZIO commands in response queue. */
+ if (ha->flags.process_response_queue &&
+ ha->response_ring_ptr->signature != RESPONSE_PROCESSED)
+ qla24xx_process_response_queue(ha);
+
+ spin_unlock_irqrestore(&pha->hardware_lock, flags);
+ return QLA_SUCCESS;
+
+queuing_error:
+ if (tot_dsds)
+ scsi_dma_unmap(cmd);
+
+ spin_unlock_irqrestore(&pha->hardware_lock, flags);
+
+ return QLA_FUNCTION_FAILED;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff