-/* -*- c-basic-offset: 8 -*-
- * fw-sbp2.c -- SBP2 driver (SCSI over IEEE1394)
+/*
+ * SBP2 driver (SCSI over IEEE1394)
*
- * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
+ * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
*
* 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
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
+/*
+ * The basic structure of this driver is based on the old storage driver,
+ * drivers/ieee1394/sbp2.c, originally written by
+ * James Goodwin <jamesg@filanet.com>
+ * with later contributions and ongoing maintenance from
+ * Ben Collins <bcollins@debian.org>,
+ * Stefan Richter <stefanr@s5r6.in-berlin.de>
+ * and many others.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
#include <linux/kernel.h>
-#include <linux/module.h>
#include <linux/mod_devicetable.h>
-#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/scatterlist.h>
-#include <linux/dma-mapping.h>
+#include <linux/string.h>
+#include <linux/stringify.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#include <asm/system.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_dbg.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
-#include "fw-transaction.h"
-#include "fw-topology.h"
#include "fw-device.h"
+#include "fw-topology.h"
+#include "fw-transaction.h"
+
+/*
+ * So far only bridges from Oxford Semiconductor are known to support
+ * concurrent logins. Depending on firmware, four or two concurrent logins
+ * are possible on OXFW911 and newer Oxsemi bridges.
+ *
+ * Concurrent logins are useful together with cluster filesystems.
+ */
+static int sbp2_param_exclusive_login = 1;
+module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644);
+MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
+ "(default = Y, use N for concurrent initiators)");
+
+/*
+ * Flags for firmware oddities
+ *
+ * - 128kB max transfer
+ * Limit transfer size. Necessary for some old bridges.
+ *
+ * - 36 byte inquiry
+ * When scsi_mod probes the device, let the inquiry command look like that
+ * from MS Windows.
+ *
+ * - skip mode page 8
+ * Suppress sending of mode_sense for mode page 8 if the device pretends to
+ * support the SCSI Primary Block commands instead of Reduced Block Commands.
+ *
+ * - fix capacity
+ * Tell sd_mod to correct the last sector number reported by read_capacity.
+ * Avoids access beyond actual disk limits on devices with an off-by-one bug.
+ * Don't use this with devices which don't have this bug.
+ *
+ * - delay inquiry
+ * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
+ *
+ * - override internal blacklist
+ * Instead of adding to the built-in blacklist, use only the workarounds
+ * specified in the module load parameter.
+ * Useful if a blacklist entry interfered with a non-broken device.
+ */
+#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1
+#define SBP2_WORKAROUND_INQUIRY_36 0x2
+#define SBP2_WORKAROUND_MODE_SENSE_8 0x4
+#define SBP2_WORKAROUND_FIX_CAPACITY 0x8
+#define SBP2_WORKAROUND_DELAY_INQUIRY 0x10
+#define SBP2_INQUIRY_DELAY 12
+#define SBP2_WORKAROUND_OVERRIDE 0x100
+
+static int sbp2_param_workarounds;
+module_param_named(workarounds, sbp2_param_workarounds, int, 0644);
+MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
+ ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
+ ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
+ ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
+ ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
+ ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
+ ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
+ ", or a combination)");
/* I don't know why the SCSI stack doesn't define something like this... */
-typedef void (*scsi_done_fn_t) (struct scsi_cmnd *);
+typedef void (*scsi_done_fn_t)(struct scsi_cmnd *);
static const char sbp2_driver_name[] = "sbp2";
-struct sbp2_device {
- struct fw_unit *unit;
+/*
+ * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry
+ * and one struct scsi_device per sbp2_logical_unit.
+ */
+struct sbp2_logical_unit {
+ struct sbp2_target *tgt;
+ struct list_head link;
struct fw_address_handler address_handler;
struct list_head orb_list;
- u64 management_agent_address;
+
u64 command_block_agent_address;
- u32 workarounds;
+ u16 lun;
int login_id;
- /* We cache these addresses and only update them once we've
- * logged in or reconnected to the sbp2 device. That way, any
- * IO to the device will automatically fail and get retried if
- * it happens in a window where the device is not ready to
- * handle it (e.g. after a bus reset but before we reconnect). */
+ /*
+ * The generation is updated once we've logged in or reconnected
+ * to the logical unit. Thus, I/O to the device will automatically
+ * fail and get retried if it happens in a window where the device
+ * is not ready, e.g. after a bus reset but before we reconnect.
+ */
+ int generation;
+ int retries;
+ struct delayed_work work;
+ bool has_sdev;
+ bool blocked;
+};
+
+/*
+ * We create one struct sbp2_target per IEEE 1212 Unit Directory
+ * and one struct Scsi_Host per sbp2_target.
+ */
+struct sbp2_target {
+ struct kref kref;
+ struct fw_unit *unit;
+ const char *bus_id;
+ struct list_head lu_list;
+
+ u64 management_agent_address;
+ u64 guid;
+ int directory_id;
int node_id;
int address_high;
- int generation;
+ unsigned int workarounds;
+ unsigned int mgt_orb_timeout;
- struct work_struct work;
- struct Scsi_Host *scsi_host;
+ int dont_block; /* counter for each logical unit */
+ int blocked; /* ditto */
};
-#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
-#define SBP2_MAX_SECTORS 255 /* Max sectors supported */
-#define SBP2_MAX_CMDS 8 /* This should be safe */
-
+/*
+ * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be
+ * provided in the config rom. Most devices do provide a value, which
+ * we'll use for login management orbs, but with some sane limits.
+ */
+#define SBP2_MIN_LOGIN_ORB_TIMEOUT 5000U /* Timeout in ms */
+#define SBP2_MAX_LOGIN_ORB_TIMEOUT 40000U /* Timeout in ms */
+#define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */
#define SBP2_ORB_NULL 0x80000000
-
-#define SBP2_DIRECTION_TO_MEDIA 0x0
-#define SBP2_DIRECTION_FROM_MEDIA 0x1
+#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
+#define SBP2_RETRY_LIMIT 0xf /* 15 retries */
+#define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */
/* Unit directory keys */
-#define SBP2_COMMAND_SET_SPECIFIER 0x38
-#define SBP2_COMMAND_SET 0x39
-#define SBP2_COMMAND_SET_REVISION 0x3b
-#define SBP2_FIRMWARE_REVISION 0x3c
-
-/* Flags for detected oddities and brokeness */
-#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1
-#define SBP2_WORKAROUND_INQUIRY_36 0x2
-#define SBP2_WORKAROUND_MODE_SENSE_8 0x4
-#define SBP2_WORKAROUND_FIX_CAPACITY 0x8
-#define SBP2_WORKAROUND_OVERRIDE 0x100
+#define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a
+#define SBP2_CSR_FIRMWARE_REVISION 0x3c
+#define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14
+#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4
/* Management orb opcodes */
#define SBP2_LOGIN_REQUEST 0x0
#define SBP2_STATUS_ILLEGAL_REQUEST 0x2
#define SBP2_STATUS_VENDOR_DEPENDENT 0x3
-#define status_get_orb_high(v) ((v).status & 0xffff)
-#define status_get_sbp_status(v) (((v).status >> 16) & 0xff)
-#define status_get_len(v) (((v).status >> 24) & 0x07)
-#define status_get_dead(v) (((v).status >> 27) & 0x01)
-#define status_get_response(v) (((v).status >> 28) & 0x03)
-#define status_get_source(v) (((v).status >> 30) & 0x03)
-#define status_get_orb_low(v) ((v).orb_low)
-#define status_get_data(v) ((v).data)
+#define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff)
+#define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff)
+#define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07)
+#define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01)
+#define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03)
+#define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03)
+#define STATUS_GET_ORB_LOW(v) ((v).orb_low)
+#define STATUS_GET_DATA(v) ((v).data)
struct sbp2_status {
u32 status;
};
struct sbp2_pointer {
- u32 high;
- u32 low;
+ __be32 high;
+ __be32 low;
};
struct sbp2_orb {
struct fw_transaction t;
+ struct kref kref;
dma_addr_t request_bus;
int rcode;
struct sbp2_pointer pointer;
- void (*callback) (struct sbp2_orb * orb, struct sbp2_status * status);
+ void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status);
struct list_head link;
};
-#define management_orb_lun(v) ((v))
-#define management_orb_function(v) ((v) << 16)
-#define management_orb_reconnect(v) ((v) << 20)
-#define management_orb_exclusive ((1) << 28)
-#define management_orb_request_format(v) ((v) << 29)
-#define management_orb_notify ((1) << 31)
+#define MANAGEMENT_ORB_LUN(v) ((v))
+#define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16)
+#define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20)
+#define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0)
+#define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29)
+#define MANAGEMENT_ORB_NOTIFY ((1) << 31)
-#define management_orb_response_length(v) ((v))
-#define management_orb_password_length(v) ((v) << 16)
+#define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v))
+#define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16)
struct sbp2_management_orb {
struct sbp2_orb base;
struct {
struct sbp2_pointer password;
struct sbp2_pointer response;
- u32 misc;
- u32 length;
+ __be32 misc;
+ __be32 length;
struct sbp2_pointer status_fifo;
} request;
__be32 response[4];
struct sbp2_status status;
};
-#define login_response_get_login_id(v) ((v).misc & 0xffff)
-#define login_response_get_length(v) (((v).misc >> 16) & 0xffff)
-
struct sbp2_login_response {
- u32 misc;
+ __be32 misc;
struct sbp2_pointer command_block_agent;
- u32 reconnect_hold;
+ __be32 reconnect_hold;
};
-
-#define command_orb_data_size(v) ((v))
-#define command_orb_page_size(v) ((v) << 16)
-#define command_orb_page_table_present ((1) << 19)
-#define command_orb_max_payload(v) ((v) << 20)
-#define command_orb_speed(v) ((v) << 24)
-#define command_orb_direction(v) ((v) << 27)
-#define command_orb_request_format(v) ((v) << 29)
-#define command_orb_notify ((1) << 31)
+#define COMMAND_ORB_DATA_SIZE(v) ((v))
+#define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16)
+#define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19)
+#define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20)
+#define COMMAND_ORB_SPEED(v) ((v) << 24)
+#define COMMAND_ORB_DIRECTION ((1) << 27)
+#define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29)
+#define COMMAND_ORB_NOTIFY ((1) << 31)
struct sbp2_command_orb {
struct sbp2_orb base;
struct {
struct sbp2_pointer next;
struct sbp2_pointer data_descriptor;
- u32 misc;
+ __be32 misc;
u8 command_block[12];
} request;
struct scsi_cmnd *cmd;
scsi_done_fn_t done;
- struct fw_unit *unit;
+ struct sbp2_logical_unit *lu;
- struct sbp2_pointer page_table[SG_ALL];
+ struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
dma_addr_t page_table_bus;
- dma_addr_t request_buffer_bus;
};
/*
static const struct {
u32 firmware_revision;
u32 model;
- unsigned workarounds;
+ unsigned int workarounds;
} sbp2_workarounds_table[] = {
/* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
.firmware_revision = 0x002800,
.workarounds = SBP2_WORKAROUND_INQUIRY_36 |
SBP2_WORKAROUND_MODE_SENSE_8,
},
+ /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
+ .firmware_revision = 0x002800,
+ .model = 0x000000,
+ .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY,
+ },
/* Initio bridges, actually only needed for some older ones */ {
.firmware_revision = 0x000200,
.model = ~0,
.model = ~0,
.workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
},
- /* There are iPods (2nd gen, 3rd gen) with model_id == 0, but
+ /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
+ .firmware_revision = 0x002600,
+ .model = ~0,
+ .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
+ },
+
+ /*
+ * There are iPods (2nd gen, 3rd gen) with model_id == 0, but
* these iPods do not feature the read_capacity bug according
* to one report. Read_capacity behaviour as well as model_id
- * could change due to Apple-supplied firmware updates though. */
+ * could change due to Apple-supplied firmware updates though.
+ */
+
/* iPod 4th generation. */ {
.firmware_revision = 0x0a2700,
.model = 0x000021,
};
static void
+free_orb(struct kref *kref)
+{
+ struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
+
+ kfree(orb);
+}
+
+static void
sbp2_status_write(struct fw_card *card, struct fw_request *request,
int tcode, int destination, int source,
int generation, int speed,
unsigned long long offset,
void *payload, size_t length, void *callback_data)
{
- struct sbp2_device *sd = callback_data;
+ struct sbp2_logical_unit *lu = callback_data;
struct sbp2_orb *orb;
struct sbp2_status status;
size_t header_size;
unsigned long flags;
if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
- length == 0 || length > sizeof status) {
+ length == 0 || length > sizeof(status)) {
fw_send_response(card, request, RCODE_TYPE_ERROR);
return;
}
fw_memcpy_from_be32(&status, payload, header_size);
if (length > header_size)
memcpy(status.data, payload + 8, length - header_size);
- if (status_get_source(status) == 2 || status_get_source(status) == 3) {
+ if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
fw_notify("non-orb related status write, not handled\n");
fw_send_response(card, request, RCODE_COMPLETE);
return;
/* Lookup the orb corresponding to this status write. */
spin_lock_irqsave(&card->lock, flags);
- list_for_each_entry(orb, &sd->orb_list, link) {
- if (status_get_orb_high(status) == 0 &&
- status_get_orb_low(status) == orb->request_bus) {
+ list_for_each_entry(orb, &lu->orb_list, link) {
+ if (STATUS_GET_ORB_HIGH(status) == 0 &&
+ STATUS_GET_ORB_LOW(status) == orb->request_bus) {
+ orb->rcode = RCODE_COMPLETE;
list_del(&orb->link);
break;
}
}
spin_unlock_irqrestore(&card->lock, flags);
- if (&orb->link != &sd->orb_list)
+ if (&orb->link != &lu->orb_list)
orb->callback(orb, &status);
else
fw_error("status write for unknown orb\n");
+ kref_put(&orb->kref, free_orb);
+
fw_send_response(card, request, RCODE_COMPLETE);
}
struct sbp2_orb *orb = data;
unsigned long flags;
- orb->rcode = rcode;
- if (rcode != RCODE_COMPLETE) {
- spin_lock_irqsave(&card->lock, flags);
+ /*
+ * This is a little tricky. We can get the status write for
+ * the orb before we get this callback. The status write
+ * handler above will assume the orb pointer transaction was
+ * successful and set the rcode to RCODE_COMPLETE for the orb.
+ * So this callback only sets the rcode if it hasn't already
+ * been set and only does the cleanup if the transaction
+ * failed and we didn't already get a status write.
+ */
+ spin_lock_irqsave(&card->lock, flags);
+
+ if (orb->rcode == -1)
+ orb->rcode = rcode;
+ if (orb->rcode != RCODE_COMPLETE) {
list_del(&orb->link);
spin_unlock_irqrestore(&card->lock, flags);
orb->callback(orb, NULL);
+ } else {
+ spin_unlock_irqrestore(&card->lock, flags);
}
+
+ kref_put(&orb->kref, free_orb);
}
static void
-sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit,
+sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu,
int node_id, int generation, u64 offset)
{
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd = unit->device.driver_data;
+ struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
unsigned long flags;
orb->pointer.high = 0;
- orb->pointer.low = orb->request_bus;
- fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof orb->pointer);
+ orb->pointer.low = cpu_to_be32(orb->request_bus);
spin_lock_irqsave(&device->card->lock, flags);
- list_add_tail(&orb->link, &sd->orb_list);
+ list_add_tail(&orb->link, &lu->orb_list);
spin_unlock_irqrestore(&device->card->lock, flags);
+ /* Take a ref for the orb list and for the transaction callback. */
+ kref_get(&orb->kref);
+ kref_get(&orb->kref);
+
fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
- node_id | LOCAL_BUS, generation,
- device->node->max_speed, offset,
- &orb->pointer, sizeof orb->pointer,
+ node_id, generation, device->max_speed, offset,
+ &orb->pointer, sizeof(orb->pointer),
complete_transaction, orb);
}
-static void sbp2_cancel_orbs(struct fw_unit *unit)
+static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu)
{
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd = unit->device.driver_data;
+ struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct sbp2_orb *orb, *next;
struct list_head list;
unsigned long flags;
+ int retval = -ENOENT;
INIT_LIST_HEAD(&list);
spin_lock_irqsave(&device->card->lock, flags);
- list_splice_init(&sd->orb_list, &list);
+ list_splice_init(&lu->orb_list, &list);
spin_unlock_irqrestore(&device->card->lock, flags);
list_for_each_entry_safe(orb, next, &list, link) {
+ retval = 0;
+ if (fw_cancel_transaction(device->card, &orb->t) == 0)
+ continue;
+
orb->rcode = RCODE_CANCELLED;
orb->callback(orb, NULL);
}
+
+ return retval;
}
static void
complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
{
struct sbp2_management_orb *orb =
- (struct sbp2_management_orb *)base_orb;
+ container_of(base_orb, struct sbp2_management_orb, base);
if (status)
- memcpy(&orb->status, status, sizeof *status);
+ memcpy(&orb->status, status, sizeof(*status));
complete(&orb->done);
}
static int
-sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
- int function, int lun, void *response)
+sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
+ int generation, int function, int lun_or_login_id,
+ void *response)
{
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd = unit->device.driver_data;
+ struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct sbp2_management_orb *orb;
- unsigned long timeout;
+ unsigned int timeout;
int retval = -ENOMEM;
- orb = kzalloc(sizeof *orb, GFP_ATOMIC);
+ if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device))
+ return 0;
+
+ orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
if (orb == NULL)
return -ENOMEM;
- /* The sbp2 device is going to send a block read request to
- * read out the request from host memory, so map it for
- * dma. */
- orb->base.request_bus =
- dma_map_single(device->card->device, &orb->request,
- sizeof orb->request, DMA_TO_DEVICE);
- if (orb->base.request_bus == 0)
- goto out;
-
+ kref_init(&orb->base.kref);
orb->response_bus =
dma_map_single(device->card->device, &orb->response,
- sizeof orb->response, DMA_FROM_DEVICE);
- if (orb->response_bus == 0)
- goto out;
+ sizeof(orb->response), DMA_FROM_DEVICE);
+ if (dma_mapping_error(orb->response_bus))
+ goto fail_mapping_response;
- orb->request.response.high = 0;
- orb->request.response.low = orb->response_bus;
+ orb->request.response.high = 0;
+ orb->request.response.low = cpu_to_be32(orb->response_bus);
- orb->request.misc =
- management_orb_notify |
- management_orb_function(function) |
- management_orb_lun(lun);
- orb->request.length =
- management_orb_response_length(sizeof orb->response);
+ orb->request.misc = cpu_to_be32(
+ MANAGEMENT_ORB_NOTIFY |
+ MANAGEMENT_ORB_FUNCTION(function) |
+ MANAGEMENT_ORB_LUN(lun_or_login_id));
+ orb->request.length = cpu_to_be32(
+ MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)));
- orb->request.status_fifo.high = sd->address_handler.offset >> 32;
- orb->request.status_fifo.low = sd->address_handler.offset;
+ orb->request.status_fifo.high =
+ cpu_to_be32(lu->address_handler.offset >> 32);
+ orb->request.status_fifo.low =
+ cpu_to_be32(lu->address_handler.offset);
- /* FIXME: Yeah, ok this isn't elegant, we hardwire exclusive
- * login and 1 second reconnect time. The reconnect setting
- * is probably fine, but the exclusive login should be an
- * option. */
if (function == SBP2_LOGIN_REQUEST) {
- orb->request.misc |=
- management_orb_exclusive |
- management_orb_reconnect(0);
+ /* Ask for 2^2 == 4 seconds reconnect grace period */
+ orb->request.misc |= cpu_to_be32(
+ MANAGEMENT_ORB_RECONNECT(2) |
+ MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login));
+ timeout = lu->tgt->mgt_orb_timeout;
+ } else {
+ timeout = SBP2_ORB_TIMEOUT;
}
- fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request);
-
init_completion(&orb->done);
orb->base.callback = complete_management_orb;
- sbp2_send_orb(&orb->base, unit,
- node_id, generation, sd->management_agent_address);
- timeout = wait_for_completion_timeout(&orb->done, 10 * HZ);
+ orb->base.request_bus =
+ dma_map_single(device->card->device, &orb->request,
+ sizeof(orb->request), DMA_TO_DEVICE);
+ if (dma_mapping_error(orb->base.request_bus))
+ goto fail_mapping_request;
+
+ sbp2_send_orb(&orb->base, lu, node_id, generation,
+ lu->tgt->management_agent_address);
- /* FIXME: Handle bus reset race here. */
+ wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout));
retval = -EIO;
- if (orb->base.rcode != RCODE_COMPLETE) {
- fw_error("management write failed, rcode 0x%02x\n",
- orb->base.rcode);
+ if (sbp2_cancel_orbs(lu) == 0) {
+ fw_error("%s: orb reply timed out, rcode=0x%02x\n",
+ lu->tgt->bus_id, orb->base.rcode);
goto out;
}
- if (timeout == 0) {
- fw_error("orb reply timed out, rcode=0x%02x\n",
- orb->base.rcode);
+ if (orb->base.rcode != RCODE_COMPLETE) {
+ fw_error("%s: management write failed, rcode 0x%02x\n",
+ lu->tgt->bus_id, orb->base.rcode);
goto out;
}
- if (status_get_response(orb->status) != 0 ||
- status_get_sbp_status(orb->status) != 0) {
- fw_error("error status: %d:%d\n",
- status_get_response(orb->status),
- status_get_sbp_status(orb->status));
+ if (STATUS_GET_RESPONSE(orb->status) != 0 ||
+ STATUS_GET_SBP_STATUS(orb->status) != 0) {
+ fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id,
+ STATUS_GET_RESPONSE(orb->status),
+ STATUS_GET_SBP_STATUS(orb->status));
goto out;
}
retval = 0;
out:
dma_unmap_single(device->card->device, orb->base.request_bus,
- sizeof orb->request, DMA_TO_DEVICE);
+ sizeof(orb->request), DMA_TO_DEVICE);
+ fail_mapping_request:
dma_unmap_single(device->card->device, orb->response_bus,
- sizeof orb->response, DMA_FROM_DEVICE);
-
+ sizeof(orb->response), DMA_FROM_DEVICE);
+ fail_mapping_response:
if (response)
- fw_memcpy_from_be32(response,
- orb->response, sizeof orb->response);
- kfree(orb);
+ memcpy(response, orb->response, sizeof(orb->response));
+ kref_put(&orb->base.kref, free_orb);
return retval;
}
static void
complete_agent_reset_write(struct fw_card *card, int rcode,
- void *payload, size_t length, void *data)
+ void *payload, size_t length, void *done)
{
- struct fw_transaction *t = data;
+ complete(done);
+}
- fw_notify("agent reset write rcode=%d\n", rcode);
- kfree(t);
+static void sbp2_agent_reset(struct sbp2_logical_unit *lu)
+{
+ struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
+ DECLARE_COMPLETION_ONSTACK(done);
+ struct fw_transaction t;
+ static u32 z;
+
+ fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST,
+ lu->tgt->node_id, lu->generation, device->max_speed,
+ lu->command_block_agent_address + SBP2_AGENT_RESET,
+ &z, sizeof(z), complete_agent_reset_write, &done);
+ wait_for_completion(&done);
}
-static int sbp2_agent_reset(struct fw_unit *unit)
+static void
+complete_agent_reset_write_no_wait(struct fw_card *card, int rcode,
+ void *payload, size_t length, void *data)
{
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd = unit->device.driver_data;
+ kfree(data);
+}
+
+static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
+{
+ struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct fw_transaction *t;
- static u32 zero;
+ static u32 z;
- t = kzalloc(sizeof *t, GFP_ATOMIC);
+ t = kmalloc(sizeof(*t), GFP_ATOMIC);
if (t == NULL)
- return -ENOMEM;
+ return;
fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
- sd->node_id | LOCAL_BUS, sd->generation, SCODE_400,
- sd->command_block_agent_address + SBP2_AGENT_RESET,
- &zero, sizeof zero, complete_agent_reset_write, t);
+ lu->tgt->node_id, lu->generation, device->max_speed,
+ lu->command_block_agent_address + SBP2_AGENT_RESET,
+ &z, sizeof(z), complete_agent_reset_write_no_wait, t);
+}
- return 0;
+static void sbp2_set_generation(struct sbp2_logical_unit *lu, int generation)
+{
+ struct fw_card *card = fw_device(lu->tgt->unit->device.parent)->card;
+ unsigned long flags;
+
+ /* serialize with comparisons of lu->generation and card->generation */
+ spin_lock_irqsave(&card->lock, flags);
+ lu->generation = generation;
+ spin_unlock_irqrestore(&card->lock, flags);
}
-static int add_scsi_devices(struct fw_unit *unit);
-static void remove_scsi_devices(struct fw_unit *unit);
+static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
+{
+ /*
+ * We may access dont_block without taking card->lock here:
+ * All callers of sbp2_allow_block() and all callers of sbp2_unblock()
+ * are currently serialized against each other.
+ * And a wrong result in sbp2_conditionally_block()'s access of
+ * dont_block is rather harmless, it simply misses its first chance.
+ */
+ --lu->tgt->dont_block;
+}
-static int sbp2_probe(struct device *dev)
+/*
+ * Blocks lu->tgt if all of the following conditions are met:
+ * - Login, INQUIRY, and high-level SCSI setup of all of the target's
+ * logical units have been finished (indicated by dont_block == 0).
+ * - lu->generation is stale.
+ *
+ * Note, scsi_block_requests() must be called while holding card->lock,
+ * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to
+ * unblock the target.
+ */
+static void sbp2_conditionally_block(struct sbp2_logical_unit *lu)
{
- struct fw_unit *unit = fw_unit(dev);
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd;
- struct fw_csr_iterator ci;
- int i, key, value, lun, retval;
- int node_id, generation, local_node_id;
+ struct sbp2_target *tgt = lu->tgt;
+ struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
+ struct Scsi_Host *shost =
+ container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->lock, flags);
+ if (!tgt->dont_block && !lu->blocked &&
+ lu->generation != card->generation) {
+ lu->blocked = true;
+ if (++tgt->blocked == 1)
+ scsi_block_requests(shost);
+ }
+ spin_unlock_irqrestore(&card->lock, flags);
+}
+
+/*
+ * Unblocks lu->tgt as soon as all its logical units can be unblocked.
+ * Note, it is harmless to run scsi_unblock_requests() outside the
+ * card->lock protected section. On the other hand, running it inside
+ * the section might clash with shost->host_lock.
+ */
+static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu)
+{
+ struct sbp2_target *tgt = lu->tgt;
+ struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
+ struct Scsi_Host *shost =
+ container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
+ unsigned long flags;
+ bool unblock = false;
+
+ spin_lock_irqsave(&card->lock, flags);
+ if (lu->blocked && lu->generation == card->generation) {
+ lu->blocked = false;
+ unblock = --tgt->blocked == 0;
+ }
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ if (unblock)
+ scsi_unblock_requests(shost);
+}
+
+/*
+ * Prevents future blocking of tgt and unblocks it.
+ * Note, it is harmless to run scsi_unblock_requests() outside the
+ * card->lock protected section. On the other hand, running it inside
+ * the section might clash with shost->host_lock.
+ */
+static void sbp2_unblock(struct sbp2_target *tgt)
+{
+ struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
+ struct Scsi_Host *shost =
+ container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->lock, flags);
+ ++tgt->dont_block;
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ scsi_unblock_requests(shost);
+}
+
+static int sbp2_lun2int(u16 lun)
+{
+ struct scsi_lun eight_bytes_lun;
+
+ memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
+ eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff;
+ eight_bytes_lun.scsi_lun[1] = lun & 0xff;
+
+ return scsilun_to_int(&eight_bytes_lun);
+}
+
+static void sbp2_release_target(struct kref *kref)
+{
+ struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref);
+ struct sbp2_logical_unit *lu, *next;
+ struct Scsi_Host *shost =
+ container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
+ struct scsi_device *sdev;
+ struct fw_device *device = fw_device(tgt->unit->device.parent);
+
+ /* prevent deadlocks */
+ sbp2_unblock(tgt);
+
+ list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
+ sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun));
+ if (sdev) {
+ scsi_remove_device(sdev);
+ scsi_device_put(sdev);
+ }
+ sbp2_send_management_orb(lu, tgt->node_id, lu->generation,
+ SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
+
+ fw_core_remove_address_handler(&lu->address_handler);
+ list_del(&lu->link);
+ kfree(lu);
+ }
+ scsi_remove_host(shost);
+ fw_notify("released %s\n", tgt->bus_id);
+
+ fw_unit_put(tgt->unit);
+ scsi_host_put(shost);
+ fw_device_put(device);
+}
+
+static struct workqueue_struct *sbp2_wq;
+
+/*
+ * Always get the target's kref when scheduling work on one its units.
+ * Each workqueue job is responsible to call sbp2_target_put() upon return.
+ */
+static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)
+{
+ if (queue_delayed_work(sbp2_wq, &lu->work, delay))
+ kref_get(&lu->tgt->kref);
+}
+
+static void sbp2_target_put(struct sbp2_target *tgt)
+{
+ kref_put(&tgt->kref, sbp2_release_target);
+}
+
+static void
+complete_set_busy_timeout(struct fw_card *card, int rcode,
+ void *payload, size_t length, void *done)
+{
+ complete(done);
+}
+
+/*
+ * Write retransmit retry values into the BUSY_TIMEOUT register.
+ * - The single-phase retry protocol is supported by all SBP-2 devices, but the
+ * default retry_limit value is 0 (i.e. never retry transmission). We write a
+ * saner value after logging into the device.
+ * - The dual-phase retry protocol is optional to implement, and if not
+ * supported, writes to the dual-phase portion of the register will be
+ * ignored. We try to write the original 1394-1995 default here.
+ * - In the case of devices that are also SBP-3-compliant, all writes are
+ * ignored, as the register is read-only, but contains single-phase retry of
+ * 15, which is what we're trying to set for all SBP-2 device anyway, so this
+ * write attempt is safe and yields more consistent behavior for all devices.
+ *
+ * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec,
+ * and section 6.4 of the SBP-3 spec for further details.
+ */
+static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu)
+{
+ struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
+ DECLARE_COMPLETION_ONSTACK(done);
+ struct fw_transaction t;
+ static __be32 busy_timeout;
+
+ busy_timeout = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT);
+
+ fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST,
+ lu->tgt->node_id, lu->generation, device->max_speed,
+ CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &busy_timeout,
+ sizeof(busy_timeout), complete_set_busy_timeout, &done);
+ wait_for_completion(&done);
+}
+
+static void sbp2_reconnect(struct work_struct *work);
+
+static void sbp2_login(struct work_struct *work)
+{
+ struct sbp2_logical_unit *lu =
+ container_of(work, struct sbp2_logical_unit, work.work);
+ struct sbp2_target *tgt = lu->tgt;
+ struct fw_device *device = fw_device(tgt->unit->device.parent);
+ struct Scsi_Host *shost;
+ struct scsi_device *sdev;
struct sbp2_login_response response;
- u32 model, firmware_revision;
+ int generation, node_id, local_node_id;
- sd = kzalloc(sizeof *sd, GFP_KERNEL);
- if (sd == NULL)
- return -ENOMEM;
+ if (fw_device_is_shutdown(device))
+ goto out;
+
+ generation = device->generation;
+ smp_rmb(); /* node_id must not be older than generation */
+ node_id = device->node_id;
+ local_node_id = device->card->node_id;
+
+ /* If this is a re-login attempt, log out, or we might be rejected. */
+ if (lu->has_sdev)
+ sbp2_send_management_orb(lu, device->node_id, generation,
+ SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
+
+ if (sbp2_send_management_orb(lu, node_id, generation,
+ SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
+ if (lu->retries++ < 5) {
+ sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
+ } else {
+ fw_error("%s: failed to login to LUN %04x\n",
+ tgt->bus_id, lu->lun);
+ /* Let any waiting I/O fail from now on. */
+ sbp2_unblock(lu->tgt);
+ }
+ goto out;
+ }
- unit->device.driver_data = sd;
- sd->unit = unit;
- INIT_LIST_HEAD(&sd->orb_list);
+ tgt->node_id = node_id;
+ tgt->address_high = local_node_id << 16;
+ sbp2_set_generation(lu, generation);
- sd->address_handler.length = 0x100;
- sd->address_handler.address_callback = sbp2_status_write;
- sd->address_handler.callback_data = sd;
+ lu->command_block_agent_address =
+ ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
+ << 32) | be32_to_cpu(response.command_block_agent.low);
+ lu->login_id = be32_to_cpu(response.misc) & 0xffff;
- if (fw_core_add_address_handler(&sd->address_handler,
- &fw_high_memory_region) < 0) {
- kfree(sd);
- return -EBUSY;
+ fw_notify("%s: logged in to LUN %04x (%d retries)\n",
+ tgt->bus_id, lu->lun, lu->retries);
+
+ /* set appropriate retry limit(s) in BUSY_TIMEOUT register */
+ sbp2_set_busy_timeout(lu);
+
+ PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
+ sbp2_agent_reset(lu);
+
+ /* This was a re-login. */
+ if (lu->has_sdev) {
+ sbp2_cancel_orbs(lu);
+ sbp2_conditionally_unblock(lu);
+ goto out;
}
- if (fw_device_enable_phys_dma(device) < 0) {
- fw_core_remove_address_handler(&sd->address_handler);
- kfree(sd);
- return -EBUSY;
+ if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
+ ssleep(SBP2_INQUIRY_DELAY);
+
+ shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
+ sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu);
+ /*
+ * FIXME: We are unable to perform reconnects while in sbp2_login().
+ * Therefore __scsi_add_device() will get into trouble if a bus reset
+ * happens in parallel. It will either fail or leave us with an
+ * unusable sdev. As a workaround we check for this and retry the
+ * whole login and SCSI probing.
+ */
+
+ /* Reported error during __scsi_add_device() */
+ if (IS_ERR(sdev))
+ goto out_logout_login;
+
+ /* Unreported error during __scsi_add_device() */
+ smp_rmb(); /* get current card generation */
+ if (generation != device->card->generation) {
+ scsi_remove_device(sdev);
+ scsi_device_put(sdev);
+ goto out_logout_login;
}
- /* Scan unit directory to get management agent address,
- * firmware revison and model. Initialize firmware_revision
- * and model to values that wont match anything in our table. */
- firmware_revision = 0xff000000;
- model = 0xff000000;
- fw_csr_iterator_init(&ci, unit->directory);
+ /* No error during __scsi_add_device() */
+ lu->has_sdev = true;
+ scsi_device_put(sdev);
+ sbp2_allow_block(lu);
+ goto out;
+
+ out_logout_login:
+ smp_rmb(); /* generation may have changed */
+ generation = device->generation;
+ smp_rmb(); /* node_id must not be older than generation */
+
+ sbp2_send_management_orb(lu, device->node_id, generation,
+ SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
+ /*
+ * If a bus reset happened, sbp2_update will have requeued
+ * lu->work already. Reset the work from reconnect to login.
+ */
+ PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
+ out:
+ sbp2_target_put(tgt);
+}
+
+static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
+{
+ struct sbp2_logical_unit *lu;
+
+ lu = kmalloc(sizeof(*lu), GFP_KERNEL);
+ if (!lu)
+ return -ENOMEM;
+
+ lu->address_handler.length = 0x100;
+ lu->address_handler.address_callback = sbp2_status_write;
+ lu->address_handler.callback_data = lu;
+
+ if (fw_core_add_address_handler(&lu->address_handler,
+ &fw_high_memory_region) < 0) {
+ kfree(lu);
+ return -ENOMEM;
+ }
+
+ lu->tgt = tgt;
+ lu->lun = lun_entry & 0xffff;
+ lu->retries = 0;
+ lu->has_sdev = false;
+ lu->blocked = false;
+ ++tgt->dont_block;
+ INIT_LIST_HEAD(&lu->orb_list);
+ INIT_DELAYED_WORK(&lu->work, sbp2_login);
+
+ list_add_tail(&lu->link, &tgt->lu_list);
+ return 0;
+}
+
+static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
+{
+ struct fw_csr_iterator ci;
+ int key, value;
+
+ fw_csr_iterator_init(&ci, directory);
+ while (fw_csr_iterator_next(&ci, &key, &value))
+ if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER &&
+ sbp2_add_logical_unit(tgt, value) < 0)
+ return -ENOMEM;
+ return 0;
+}
+
+static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory,
+ u32 *model, u32 *firmware_revision)
+{
+ struct fw_csr_iterator ci;
+ int key, value;
+ unsigned int timeout;
+
+ fw_csr_iterator_init(&ci, directory);
while (fw_csr_iterator_next(&ci, &key, &value)) {
switch (key) {
+
case CSR_DEPENDENT_INFO | CSR_OFFSET:
- sd->management_agent_address =
- 0xfffff0000000ULL + 4 * value;
+ tgt->management_agent_address =
+ CSR_REGISTER_BASE + 4 * value;
break;
- case SBP2_FIRMWARE_REVISION:
- firmware_revision = value;
+
+ case CSR_DIRECTORY_ID:
+ tgt->directory_id = value;
break;
+
case CSR_MODEL:
- model = value;
+ *model = value;
+ break;
+
+ case SBP2_CSR_FIRMWARE_REVISION:
+ *firmware_revision = value;
+ break;
+
+ case SBP2_CSR_UNIT_CHARACTERISTICS:
+ /* the timeout value is stored in 500ms units */
+ timeout = ((unsigned int) value >> 8 & 0xff) * 500;
+ timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT);
+ tgt->mgt_orb_timeout =
+ min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT);
+
+ if (timeout > tgt->mgt_orb_timeout)
+ fw_notify("%s: config rom contains %ds "
+ "management ORB timeout, limiting "
+ "to %ds\n", tgt->bus_id,
+ timeout / 1000,
+ tgt->mgt_orb_timeout / 1000);
+ break;
+
+ case SBP2_CSR_LOGICAL_UNIT_NUMBER:
+ if (sbp2_add_logical_unit(tgt, value) < 0)
+ return -ENOMEM;
+ break;
+
+ case SBP2_CSR_LOGICAL_UNIT_DIRECTORY:
+ if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0)
+ return -ENOMEM;
break;
}
}
+ return 0;
+}
+
+static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model,
+ u32 firmware_revision)
+{
+ int i;
+ unsigned int w = sbp2_param_workarounds;
+
+ if (w)
+ fw_notify("Please notify linux1394-devel@lists.sourceforge.net "
+ "if you need the workarounds parameter for %s\n",
+ tgt->bus_id);
+
+ if (w & SBP2_WORKAROUND_OVERRIDE)
+ goto out;
for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
+
if (sbp2_workarounds_table[i].firmware_revision !=
(firmware_revision & 0xffffff00))
continue;
+
if (sbp2_workarounds_table[i].model != model &&
sbp2_workarounds_table[i].model != ~0)
continue;
- sd->workarounds |= sbp2_workarounds_table[i].workarounds;
+
+ w |= sbp2_workarounds_table[i].workarounds;
break;
}
-
- if (sd->workarounds)
- fw_notify("Workarounds for node %s: 0x%x "
+ out:
+ if (w)
+ fw_notify("Workarounds for %s: 0x%x "
"(firmware_revision 0x%06x, model_id 0x%06x)\n",
- unit->device.bus_id,
- sd->workarounds, firmware_revision, model);
-
- /* FIXME: Make this work for multi-lun devices. */
- lun = 0;
-
- generation = device->card->generation;
- node_id = device->node->node_id;
- local_node_id = device->card->local_node->node_id;
-
- /* FIXME: We should probably do this from a keventd callback
- * and handle retries by rescheduling the work. */
- if (sbp2_send_management_orb(unit, node_id, generation,
- SBP2_LOGIN_REQUEST, lun, &response) < 0) {
- fw_core_remove_address_handler(&sd->address_handler);
- kfree(sd);
- return -EBUSY;
- }
+ tgt->bus_id, w, firmware_revision, model);
+ tgt->workarounds = w;
+}
- sd->generation = generation;
- sd->node_id = node_id;
- sd->address_high = (LOCAL_BUS | local_node_id) << 16;
-
- /* Get command block agent offset and login id. */
- sd->command_block_agent_address =
- ((u64) response.command_block_agent.high << 32) |
- response.command_block_agent.low;
- sd->login_id = login_response_get_login_id(response);
-
- fw_notify("logged in to sbp2 unit %s\n", unit->device.bus_id);
- fw_notify(" - management_agent_address: 0x%012llx\n",
- (unsigned long long) sd->management_agent_address);
- fw_notify(" - command_block_agent_address: 0x%012llx\n",
- (unsigned long long) sd->command_block_agent_address);
- fw_notify(" - status write address: 0x%012llx\n",
- (unsigned long long) sd->address_handler.offset);
-
-#if 0
- /* FIXME: The linux1394 sbp2 does this last step. */
- sbp2_set_busy_timeout(scsi_id);
-#endif
+static struct scsi_host_template scsi_driver_template;
+
+static int sbp2_probe(struct device *dev)
+{
+ struct fw_unit *unit = fw_unit(dev);
+ struct fw_device *device = fw_device(unit->device.parent);
+ struct sbp2_target *tgt;
+ struct sbp2_logical_unit *lu;
+ struct Scsi_Host *shost;
+ u32 model, firmware_revision;
- sbp2_agent_reset(unit);
+ shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
+ if (shost == NULL)
+ return -ENOMEM;
- retval = add_scsi_devices(unit);
- if (retval < 0) {
- sbp2_send_management_orb(unit, sd->node_id, sd->generation,
- SBP2_LOGOUT_REQUEST, sd->login_id,
- NULL);
- fw_core_remove_address_handler(&sd->address_handler);
- kfree(sd);
- return retval;
- }
+ tgt = (struct sbp2_target *)shost->hostdata;
+ unit->device.driver_data = tgt;
+ tgt->unit = unit;
+ kref_init(&tgt->kref);
+ INIT_LIST_HEAD(&tgt->lu_list);
+ tgt->bus_id = unit->device.bus_id;
+ tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
+
+ if (fw_device_enable_phys_dma(device) < 0)
+ goto fail_shost_put;
+
+ if (scsi_add_host(shost, &unit->device) < 0)
+ goto fail_shost_put;
+
+ fw_device_get(device);
+ fw_unit_get(unit);
+
+ /* Initialize to values that won't match anything in our table. */
+ firmware_revision = 0xff000000;
+ model = 0xff000000;
+
+ /* implicit directory ID */
+ tgt->directory_id = ((unit->directory - device->config_rom) * 4
+ + CSR_CONFIG_ROM) & 0xffffff;
+ if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
+ &firmware_revision) < 0)
+ goto fail_tgt_put;
+
+ sbp2_init_workarounds(tgt, model, firmware_revision);
+
+ /* Do the login in a workqueue so we can easily reschedule retries. */
+ list_for_each_entry(lu, &tgt->lu_list, link)
+ sbp2_queue_work(lu, 0);
return 0;
+
+ fail_tgt_put:
+ sbp2_target_put(tgt);
+ return -ENOMEM;
+
+ fail_shost_put:
+ scsi_host_put(shost);
+ return -ENOMEM;
}
static int sbp2_remove(struct device *dev)
{
struct fw_unit *unit = fw_unit(dev);
- struct sbp2_device *sd = unit->device.driver_data;
-
- sbp2_send_management_orb(unit, sd->node_id, sd->generation,
- SBP2_LOGOUT_REQUEST, sd->login_id, NULL);
-
- remove_scsi_devices(unit);
-
- fw_core_remove_address_handler(&sd->address_handler);
- kfree(sd);
-
- fw_notify("removed sbp2 unit %s\n", dev->bus_id);
+ struct sbp2_target *tgt = unit->device.driver_data;
+ sbp2_target_put(tgt);
return 0;
}
static void sbp2_reconnect(struct work_struct *work)
{
- struct sbp2_device *sd = container_of(work, struct sbp2_device, work);
- struct fw_unit *unit = sd->unit;
- struct fw_device *device = fw_device(unit->device.parent);
+ struct sbp2_logical_unit *lu =
+ container_of(work, struct sbp2_logical_unit, work.work);
+ struct sbp2_target *tgt = lu->tgt;
+ struct fw_device *device = fw_device(tgt->unit->device.parent);
int generation, node_id, local_node_id;
- fw_notify("in sbp2_reconnect, reconnecting to unit %s\n",
- unit->device.bus_id);
-
- generation = device->card->generation;
- node_id = device->node->node_id;
- local_node_id = device->card->local_node->node_id;
+ if (fw_device_is_shutdown(device))
+ goto out;
- sbp2_send_management_orb(unit, node_id, generation,
- SBP2_RECONNECT_REQUEST, sd->login_id, NULL);
+ generation = device->generation;
+ smp_rmb(); /* node_id must not be older than generation */
+ node_id = device->node_id;
+ local_node_id = device->card->node_id;
+
+ if (sbp2_send_management_orb(lu, node_id, generation,
+ SBP2_RECONNECT_REQUEST,
+ lu->login_id, NULL) < 0) {
+ /*
+ * If reconnect was impossible even though we are in the
+ * current generation, fall back and try to log in again.
+ *
+ * We could check for "Function rejected" status, but
+ * looking at the bus generation as simpler and more general.
+ */
+ smp_rmb(); /* get current card generation */
+ if (generation == device->card->generation ||
+ lu->retries++ >= 5) {
+ fw_error("%s: failed to reconnect\n", tgt->bus_id);
+ lu->retries = 0;
+ PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
+ }
+ sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
+ goto out;
+ }
- /* FIXME: handle reconnect failures. */
+ tgt->node_id = node_id;
+ tgt->address_high = local_node_id << 16;
+ sbp2_set_generation(lu, generation);
- sbp2_cancel_orbs(unit);
+ fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
+ tgt->bus_id, lu->lun, lu->retries);
- sd->generation = generation;
- sd->node_id = node_id;
- sd->address_high = (LOCAL_BUS | local_node_id) << 16;
+ sbp2_agent_reset(lu);
+ sbp2_cancel_orbs(lu);
+ sbp2_conditionally_unblock(lu);
+ out:
+ sbp2_target_put(tgt);
}
static void sbp2_update(struct fw_unit *unit)
{
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd = unit->device.driver_data;
-
- fw_device_enable_phys_dma(device);
-
- INIT_WORK(&sd->work, sbp2_reconnect);
- schedule_work(&sd->work);
+ struct sbp2_target *tgt = unit->device.driver_data;
+ struct sbp2_logical_unit *lu;
+
+ fw_device_enable_phys_dma(fw_device(unit->device.parent));
+
+ /*
+ * Fw-core serializes sbp2_update() against sbp2_remove().
+ * Iteration over tgt->lu_list is therefore safe here.
+ */
+ list_for_each_entry(lu, &tgt->lu_list, link) {
+ sbp2_conditionally_block(lu);
+ lu->retries = 0;
+ sbp2_queue_work(lu, 0);
+ }
}
#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
#define SBP2_SW_VERSION_ENTRY 0x00010483
-static struct fw_device_id sbp2_id_table[] = {
+static const struct fw_device_id sbp2_id_table[] = {
{
.match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION,
.specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,
- .version = SBP2_SW_VERSION_ENTRY
+ .version = SBP2_SW_VERSION_ENTRY,
},
{ }
};
.id_table = sbp2_id_table,
};
-static unsigned int sbp2_status_to_sense_data(u8 * sbp2_status, u8 * sense_data)
+static unsigned int
+sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
{
+ int sam_status;
+
sense_data[0] = 0x70;
sense_data[1] = 0x0;
sense_data[2] = sbp2_status[1];
sense_data[14] = sbp2_status[12];
sense_data[15] = sbp2_status[13];
- switch (sbp2_status[0] & 0x3f) {
- case SAM_STAT_GOOD:
- return DID_OK;
+ sam_status = sbp2_status[0] & 0x3f;
+ switch (sam_status) {
+ case SAM_STAT_GOOD:
case SAM_STAT_CHECK_CONDITION:
- /* return CHECK_CONDITION << 1 | DID_OK << 16; */
- return DID_OK;
-
- case SAM_STAT_BUSY:
- return DID_BUS_BUSY;
-
case SAM_STAT_CONDITION_MET:
+ case SAM_STAT_BUSY:
case SAM_STAT_RESERVATION_CONFLICT:
case SAM_STAT_COMMAND_TERMINATED:
+ return DID_OK << 16 | sam_status;
+
default:
- return DID_ERROR;
+ return DID_ERROR << 16;
}
}
static void
complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
{
- struct sbp2_command_orb *orb = (struct sbp2_command_orb *)base_orb;
- struct fw_unit *unit = orb->unit;
- struct fw_device *device = fw_device(unit->device.parent);
- struct scatterlist *sg;
+ struct sbp2_command_orb *orb =
+ container_of(base_orb, struct sbp2_command_orb, base);
+ struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent);
int result;
if (status != NULL) {
- if (status_get_dead(*status)) {
- fw_notify("agent died, issuing agent reset\n");
- sbp2_agent_reset(unit);
- }
+ if (STATUS_GET_DEAD(*status))
+ sbp2_agent_reset_no_wait(orb->lu);
- switch (status_get_response(*status)) {
+ switch (STATUS_GET_RESPONSE(*status)) {
case SBP2_STATUS_REQUEST_COMPLETE:
- result = DID_OK;
+ result = DID_OK << 16;
break;
case SBP2_STATUS_TRANSPORT_FAILURE:
- result = DID_BUS_BUSY;
+ result = DID_BUS_BUSY << 16;
break;
case SBP2_STATUS_ILLEGAL_REQUEST:
case SBP2_STATUS_VENDOR_DEPENDENT:
default:
- result = DID_ERROR;
+ result = DID_ERROR << 16;
break;
}
- if (result == DID_OK && status_get_len(*status) > 1)
- result = sbp2_status_to_sense_data(status_get_data(*status),
+ if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1)
+ result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status),
orb->cmd->sense_buffer);
} else {
- /* If the orb completes with status == NULL, something
+ /*
+ * If the orb completes with status == NULL, something
* went wrong, typically a bus reset happened mid-orb
- * or when sending the write (less likely). */
- fw_notify("no command orb status, rcode=%d\n",
- orb->base.rcode);
- result = DID_ERROR;
+ * or when sending the write (less likely).
+ */
+ result = DID_BUS_BUSY << 16;
+ sbp2_conditionally_block(orb->lu);
}
dma_unmap_single(device->card->device, orb->base.request_bus,
- sizeof orb->request, DMA_TO_DEVICE);
+ sizeof(orb->request), DMA_TO_DEVICE);
- if (orb->cmd->use_sg > 0) {
- sg = (struct scatterlist *)orb->cmd->request_buffer;
- dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg,
+ if (scsi_sg_count(orb->cmd) > 0)
+ dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
+ scsi_sg_count(orb->cmd),
orb->cmd->sc_data_direction);
- }
if (orb->page_table_bus != 0)
dma_unmap_single(device->card->device, orb->page_table_bus,
- sizeof orb->page_table_bus, DMA_TO_DEVICE);
-
- if (orb->request_buffer_bus != 0)
- dma_unmap_single(device->card->device, orb->request_buffer_bus,
- sizeof orb->request_buffer_bus,
- DMA_FROM_DEVICE);
+ sizeof(orb->page_table), DMA_TO_DEVICE);
- orb->cmd->result = result << 16;
+ orb->cmd->result = result;
orb->done(orb->cmd);
-
- kfree(orb);
}
-static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
+static int
+sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device,
+ struct sbp2_logical_unit *lu)
{
- struct fw_unit *unit =
- (struct fw_unit *)orb->cmd->device->host->hostdata[0];
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd = unit->device.driver_data;
struct scatterlist *sg;
int sg_len, l, i, j, count;
- size_t size;
dma_addr_t sg_addr;
- sg = (struct scatterlist *)orb->cmd->request_buffer;
- count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg,
+ sg = scsi_sglist(orb->cmd);
+ count = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
orb->cmd->sc_data_direction);
+ if (count == 0)
+ goto fail;
- /* Handle the special case where there is only one element in
+ /*
+ * Handle the special case where there is only one element in
* the scatter list by converting it to an immediate block
* request. This is also a workaround for broken devices such
* as the second generation iPod which doesn't support page
- * tables. */
+ * tables.
+ */
if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) {
- orb->request.data_descriptor.high = sd->address_high;
- orb->request.data_descriptor.low = sg_dma_address(sg);
+ orb->request.data_descriptor.high =
+ cpu_to_be32(lu->tgt->address_high);
+ orb->request.data_descriptor.low =
+ cpu_to_be32(sg_dma_address(sg));
orb->request.misc |=
- command_orb_data_size(sg_dma_len(sg));
- return;
+ cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)));
+ return 0;
}
- /* Convert the scatterlist to an sbp2 page table. If any
- * scatterlist entries are too big for sbp2 we split the as we go. */
- for (i = 0, j = 0; i < count; i++) {
- sg_len = sg_dma_len(sg + i);
- sg_addr = sg_dma_address(sg + i);
+ /*
+ * Convert the scatterlist to an sbp2 page table. If any
+ * scatterlist entries are too big for sbp2, we split them as we
+ * go. Even if we ask the block I/O layer to not give us sg
+ * elements larger than 65535 bytes, some IOMMUs may merge sg elements
+ * during DMA mapping, and Linux currently doesn't prevent this.
+ */
+ for (i = 0, j = 0; i < count; i++, sg = sg_next(sg)) {
+ sg_len = sg_dma_len(sg);
+ sg_addr = sg_dma_address(sg);
while (sg_len) {
+ /* FIXME: This won't get us out of the pinch. */
+ if (unlikely(j >= ARRAY_SIZE(orb->page_table))) {
+ fw_error("page table overflow\n");
+ goto fail_page_table;
+ }
l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH);
- orb->page_table[j].low = sg_addr;
- orb->page_table[j].high = (l << 16);
+ orb->page_table[j].low = cpu_to_be32(sg_addr);
+ orb->page_table[j].high = cpu_to_be32(l << 16);
sg_addr += l;
sg_len -= l;
j++;
}
}
- size = sizeof orb->page_table[0] * j;
+ orb->page_table_bus =
+ dma_map_single(device->card->device, orb->page_table,
+ sizeof(orb->page_table), DMA_TO_DEVICE);
+ if (dma_mapping_error(orb->page_table_bus))
+ goto fail_page_table;
- /* The data_descriptor pointer is the one case where we need
+ /*
+ * The data_descriptor pointer is the one case where we need
* to fill in the node ID part of the address. All other
* pointers assume that the data referenced reside on the
* initiator (i.e. us), but data_descriptor can refer to data
- * on other nodes so we need to put our ID in descriptor.high. */
+ * on other nodes so we need to put our ID in descriptor.high.
+ */
+ orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high);
+ orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus);
+ orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT |
+ COMMAND_ORB_DATA_SIZE(j));
- orb->page_table_bus =
- dma_map_single(device->card->device, orb->page_table,
- size, DMA_TO_DEVICE);
- orb->request.data_descriptor.high = sd->address_high;
- orb->request.data_descriptor.low = orb->page_table_bus;
- orb->request.misc |=
- command_orb_page_table_present |
- command_orb_data_size(j);
-
- fw_memcpy_to_be32(orb->page_table, orb->page_table, size);
-}
+ return 0;
-static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb)
-{
- struct fw_unit *unit =
- (struct fw_unit *)orb->cmd->device->host->hostdata[0];
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd = unit->device.driver_data;
-
- /* As for map_scatterlist, we need to fill in the high bits of
- * the data_descriptor pointer. */
-
- orb->request_buffer_bus =
- dma_map_single(device->card->device,
- orb->cmd->request_buffer,
- orb->cmd->request_bufflen,
- orb->cmd->sc_data_direction);
- orb->request.data_descriptor.high = sd->address_high;
- orb->request.data_descriptor.low = orb->request_buffer_bus;
- orb->request.misc |=
- command_orb_data_size(orb->cmd->request_bufflen);
+ fail_page_table:
+ dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
+ orb->cmd->sc_data_direction);
+ fail:
+ return -ENOMEM;
}
/* SCSI stack integration */
static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
{
- struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0];
- struct fw_device *device = fw_device(unit->device.parent);
- struct sbp2_device *sd = unit->device.driver_data;
+ struct sbp2_logical_unit *lu = cmd->device->hostdata;
+ struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct sbp2_command_orb *orb;
+ unsigned int max_payload;
+ int retval = SCSI_MLQUEUE_HOST_BUSY;
- /* Bidirectional commands are not yet implemented, and unknown
- * transfer direction not handled. */
+ /*
+ * Bidirectional commands are not yet implemented, and unknown
+ * transfer direction not handled.
+ */
if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
- fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
+ fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
cmd->result = DID_ERROR << 16;
done(cmd);
return 0;
}
- orb = kzalloc(sizeof *orb, GFP_ATOMIC);
+ orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
if (orb == NULL) {
fw_notify("failed to alloc orb\n");
- cmd->result = DID_NO_CONNECT << 16;
- done(cmd);
- return 0;
+ return SCSI_MLQUEUE_HOST_BUSY;
}
- orb->base.request_bus =
- dma_map_single(device->card->device, &orb->request,
- sizeof orb->request, DMA_TO_DEVICE);
+ /* Initialize rcode to something not RCODE_COMPLETE. */
+ orb->base.rcode = -1;
+ kref_init(&orb->base.kref);
- orb->unit = unit;
+ orb->lu = lu;
orb->done = done;
orb->cmd = cmd;
- orb->request.next.high = SBP2_ORB_NULL;
- orb->request.next.low = 0x0;
- /* At speed 100 we can do 512 bytes per packet, at speed 200,
+ orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL);
+ /*
+ * At speed 100 we can do 512 bytes per packet, at speed 200,
* 1024 bytes per packet etc. The SBP-2 max_payload field
* specifies the max payload size as 2 ^ (max_payload + 2), so
- * if we set this to max_speed + 7, we get the right value. */
- orb->request.misc =
- command_orb_max_payload(device->node->max_speed + 7) |
- command_orb_speed(device->node->max_speed) |
- command_orb_notify;
+ * if we set this to max_speed + 7, we get the right value.
+ */
+ max_payload = min(device->max_speed + 7,
+ device->card->max_receive - 1);
+ orb->request.misc = cpu_to_be32(
+ COMMAND_ORB_MAX_PAYLOAD(max_payload) |
+ COMMAND_ORB_SPEED(device->max_speed) |
+ COMMAND_ORB_NOTIFY);
if (cmd->sc_data_direction == DMA_FROM_DEVICE)
- orb->request.misc |=
- command_orb_direction(SBP2_DIRECTION_FROM_MEDIA);
- else if (cmd->sc_data_direction == DMA_TO_DEVICE)
- orb->request.misc |=
- command_orb_direction(SBP2_DIRECTION_TO_MEDIA);
-
- if (cmd->use_sg) {
- sbp2_command_orb_map_scatterlist(orb);
- } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) {
- /* FIXME: Need to split this into a sg list... but
- * could we get the scsi or blk layer to do that by
- * reporting our max supported block size? */
- fw_error("command > 64k\n");
- cmd->result = DID_ERROR << 16;
- done(cmd);
- return 0;
- } else if (cmd->request_bufflen > 0) {
- sbp2_command_orb_map_buffer(orb);
- }
+ orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
- fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request);
+ if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
+ goto out;
- memset(orb->request.command_block,
- 0, sizeof orb->request.command_block);
- memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
+ memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len);
orb->base.callback = complete_command_orb;
+ orb->base.request_bus =
+ dma_map_single(device->card->device, &orb->request,
+ sizeof(orb->request), DMA_TO_DEVICE);
+ if (dma_mapping_error(orb->base.request_bus))
+ goto out;
+
+ sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation,
+ lu->command_block_agent_address + SBP2_ORB_POINTER);
+ retval = 0;
+ out:
+ kref_put(&orb->base.kref, free_orb);
+ return retval;
+}
- sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation,
- sd->command_block_agent_address + SBP2_ORB_POINTER);
+static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
+{
+ struct sbp2_logical_unit *lu = sdev->hostdata;
+
+ /* (Re-)Adding logical units via the SCSI stack is not supported. */
+ if (!lu)
+ return -ENOSYS;
+
+ sdev->allow_restart = 1;
+
+ /* SBP-2 requires quadlet alignment of the data buffers. */
+ blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
+
+ if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
+ sdev->inquiry_len = 36;
return 0;
}
static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
{
- struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0];
- struct sbp2_device *sd = unit->device.driver_data;
+ struct sbp2_logical_unit *lu = sdev->hostdata;
+
+ sdev->use_10_for_rw = 1;
+
+ if (sdev->type == TYPE_ROM)
+ sdev->use_10_for_ms = 1;
if (sdev->type == TYPE_DISK &&
- sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
+ lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
sdev->skip_ms_page_8 = 1;
- if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) {
- fw_notify("setting fix_capacity for %s\n", unit->device.bus_id);
+
+ if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
sdev->fix_capacity = 1;
- }
+
+ if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
+ blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
return 0;
}
*/
static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
{
- struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0];
-
- fw_notify("sbp2_scsi_abort\n");
+ struct sbp2_logical_unit *lu = cmd->device->hostdata;
- sbp2_cancel_orbs(unit);
+ fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id);
+ sbp2_agent_reset(lu);
+ sbp2_cancel_orbs(lu);
return SUCCESS;
}
+/*
+ * Format of /sys/bus/scsi/devices/.../ieee1394_id:
+ * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal)
+ *
+ * This is the concatenation of target port identifier and logical unit
+ * identifier as per SAM-2...SAM-4 annex A.
+ */
+static ssize_t
+sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct sbp2_logical_unit *lu;
+
+ if (!sdev)
+ return 0;
+
+ lu = sdev->hostdata;
+
+ return sprintf(buf, "%016llx:%06x:%04x\n",
+ (unsigned long long)lu->tgt->guid,
+ lu->tgt->directory_id, lu->lun);
+}
+
+static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
+
+static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
+ &dev_attr_ieee1394_id,
+ NULL
+};
+
static struct scsi_host_template scsi_driver_template = {
.module = THIS_MODULE,
.name = "SBP-2 IEEE-1394",
- .proc_name = (char *)sbp2_driver_name,
+ .proc_name = sbp2_driver_name,
.queuecommand = sbp2_scsi_queuecommand,
+ .slave_alloc = sbp2_scsi_slave_alloc,
.slave_configure = sbp2_scsi_slave_configure,
.eh_abort_handler = sbp2_scsi_abort,
.this_id = -1,
.sg_tablesize = SG_ALL,
.use_clustering = ENABLE_CLUSTERING,
- .cmd_per_lun = 1, /* SBP2_MAX_CMDS, */
- .can_queue = 1, /* SBP2_MAX_CMDS, */
- .emulated = 1,
+ .cmd_per_lun = 1,
+ .can_queue = 1,
+ .sdev_attrs = sbp2_scsi_sysfs_attrs,
};
-static int add_scsi_devices(struct fw_unit *unit)
-{
- struct sbp2_device *sd = unit->device.driver_data;
- int retval, lun;
-
- sd->scsi_host = scsi_host_alloc(&scsi_driver_template,
- sizeof(unsigned long));
- if (sd->scsi_host == NULL) {
- fw_error("failed to register scsi host\n");
- return -1;
- }
-
- sd->scsi_host->hostdata[0] = (unsigned long)unit;
- retval = scsi_add_host(sd->scsi_host, &unit->device);
- if (retval < 0) {
- fw_error("failed to add scsi host\n");
- scsi_host_put(sd->scsi_host);
- return retval;
- }
-
- /* FIXME: Loop over luns here. */
- lun = 0;
- retval = scsi_add_device(sd->scsi_host, 0, 0, lun);
- if (retval < 0) {
- fw_error("failed to add scsi device\n");
- scsi_remove_host(sd->scsi_host);
- scsi_host_put(sd->scsi_host);
- return retval;
- }
-
- return 0;
-}
-
-static void remove_scsi_devices(struct fw_unit *unit)
-{
- struct sbp2_device *sd = unit->device.driver_data;
-
- scsi_remove_host(sd->scsi_host);
- scsi_host_put(sd->scsi_host);
-}
-
MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
MODULE_DESCRIPTION("SCSI over IEEE1394");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
+/* Provide a module alias so root-on-sbp2 initrds don't break. */
+#ifndef CONFIG_IEEE1394_SBP2_MODULE
+MODULE_ALIAS("sbp2");
+#endif
+
static int __init sbp2_init(void)
{
+ sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME);
+ if (!sbp2_wq)
+ return -ENOMEM;
+
return driver_register(&sbp2_driver.driver);
}
static void __exit sbp2_cleanup(void)
{
driver_unregister(&sbp2_driver.driver);
+ destroy_workqueue(sbp2_wq);
}
module_init(sbp2_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff