#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
#include <linux/string.h>
+#include <linux/stringify.h>
#include <linux/timer.h>
+#include <linux/workqueue.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>
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.
+ *
+ * - 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_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)
+ ", 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 *);
static const char sbp2_driver_name[] = "sbp2";
-struct sbp2_device {
- struct kref kref;
- 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 scsi_device *sdev;
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 node_id;
- int address_high;
int generation;
-
int retries;
struct delayed_work work;
};
+/*
+ * 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;
+
+ u64 management_agent_address;
+ int directory_id;
+ int node_id;
+ int address_high;
+
+ unsigned workarounds;
+ struct list_head lu_list;
+};
+
#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
#define SBP2_MAX_SECTORS 255 /* Max sectors supported */
#define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */
#define SBP2_DIRECTION_FROM_MEDIA 0x1
/* 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_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
} 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] __attribute__((aligned(8)));
dma_addr_t page_table_bus;
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;
/* Lookup the orb corresponding to this status write. */
spin_lock_irqsave(&card->lock, flags);
- list_for_each_entry(orb, &sd->orb_list, link) {
+ 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;
}
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");
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);
}
- 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;
fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer));
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. */
complete_transaction, orb);
}
-static int 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;
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) {
}
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;
int retval = -ENOMEM;
orb->request.misc =
MANAGEMENT_ORB_NOTIFY |
MANAGEMENT_ORB_FUNCTION(function) |
- MANAGEMENT_ORB_LUN(lun);
+ MANAGEMENT_ORB_LUN(lun_or_login_id);
orb->request.length =
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 = lu->address_handler.offset >> 32;
+ orb->request.status_fifo.low = lu->address_handler.offset;
if (function == SBP2_LOGIN_REQUEST) {
orb->request.misc |=
if (dma_mapping_error(orb->base.request_bus))
goto fail_mapping_request;
- sbp2_send_orb(&orb->base, unit,
- node_id, generation, sd->management_agent_address);
+ sbp2_send_orb(&orb->base, lu, node_id, generation,
+ lu->tgt->management_agent_address);
wait_for_completion_timeout(&orb->done,
msecs_to_jiffies(SBP2_ORB_TIMEOUT));
retval = -EIO;
- if (sbp2_cancel_orbs(unit) == 0) {
+ if (sbp2_cancel_orbs(lu) == 0) {
fw_error("orb reply timed out, rcode=0x%02x\n",
orb->base.rcode);
goto out;
kfree(t);
}
-static int sbp2_agent_reset(struct fw_unit *unit)
+static int sbp2_agent_reset(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 fw_transaction *t;
static u32 zero;
return -ENOMEM;
fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
- sd->node_id, sd->generation, device->max_speed,
- sd->command_block_agent_address + SBP2_AGENT_RESET,
+ lu->tgt->node_id, lu->generation, device->max_speed,
+ lu->command_block_agent_address + SBP2_AGENT_RESET,
&zero, sizeof(zero), complete_agent_reset_write, t);
return 0;
}
-static void sbp2_reconnect(struct work_struct *work);
-static struct scsi_host_template scsi_driver_template;
-
-static void release_sbp2_device(struct kref *kref)
+static void sbp2_release_target(struct kref *kref)
{
- struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref);
- struct Scsi_Host *host =
- container_of((void *)sd, struct Scsi_Host, hostdata[0]);
-
- scsi_remove_host(host);
- sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation,
- SBP2_LOGOUT_REQUEST, sd->login_id, NULL);
- fw_core_remove_address_handler(&sd->address_handler);
- fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id);
- put_device(&sd->unit->device);
- scsi_host_put(host);
+ 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]);
+
+ list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
+ if (lu->sdev)
+ scsi_remove_device(lu->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->unit->device.bus_id);
+
+ put_device(&tgt->unit->device);
+ scsi_host_put(shost);
}
+static struct workqueue_struct *sbp2_wq;
+
+static void sbp2_reconnect(struct work_struct *work);
+
static void sbp2_login(struct work_struct *work)
{
- struct sbp2_device *sd =
- container_of(work, struct sbp2_device, work.work);
- struct Scsi_Host *host =
- container_of((void *)sd, struct Scsi_Host, hostdata[0]);
- struct fw_unit *unit = sd->unit;
+ struct sbp2_logical_unit *lu =
+ container_of(work, struct sbp2_logical_unit, work.work);
+ struct Scsi_Host *shost =
+ container_of((void *)lu->tgt, struct Scsi_Host, hostdata[0]);
+ struct scsi_device *sdev;
+ struct scsi_lun eight_bytes_lun;
+ struct fw_unit *unit = lu->tgt->unit;
struct fw_device *device = fw_device(unit->device.parent);
struct sbp2_login_response response;
- int generation, node_id, local_node_id, lun, retval;
-
- /* FIXME: Make this work for multi-lun devices. */
- lun = 0;
+ int generation, node_id, local_node_id;
generation = device->card->generation;
node_id = device->node->node_id;
local_node_id = device->card->local_node->node_id;
- if (sbp2_send_management_orb(unit, node_id, generation,
- SBP2_LOGIN_REQUEST, lun, &response) < 0) {
- if (sd->retries++ < 5) {
- schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5));
+ if (sbp2_send_management_orb(lu, node_id, generation,
+ SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
+ if (lu->retries++ < 5) {
+ queue_delayed_work(sbp2_wq, &lu->work,
+ DIV_ROUND_UP(HZ, 5));
} else {
- fw_error("failed to login to %s\n",
- unit->device.bus_id);
- kref_put(&sd->kref, release_sbp2_device);
+ fw_error("failed to login to %s LUN %04x\n",
+ unit->device.bus_id, lu->lun);
+ kref_put(&lu->tgt->kref, sbp2_release_target);
}
return;
}
- sd->generation = generation;
- sd->node_id = node_id;
- sd->address_high = local_node_id << 16;
+ lu->generation = generation;
+ lu->tgt->node_id = node_id;
+ lu->tgt->address_high = local_node_id << 16;
/* Get command block agent offset and login id. */
- sd->command_block_agent_address =
+ lu->command_block_agent_address =
((u64) (response.command_block_agent.high & 0xffff) << 32) |
response.command_block_agent.low;
- sd->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response);
+ lu->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response);
- fw_notify("logged in to sbp2 unit %s (%d retries)\n",
- unit->device.bus_id, sd->retries);
- 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);
+ fw_notify("logged in to %s LUN %04x (%d retries)\n",
+ unit->device.bus_id, lu->lun, lu->retries);
#if 0
/* FIXME: The linux1394 sbp2 does this last step. */
sbp2_set_busy_timeout(scsi_id);
#endif
- PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect);
- sbp2_agent_reset(unit);
+ PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
+ sbp2_agent_reset(lu);
+
+ memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
+ eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff;
+ eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff;
- /* FIXME: Loop over luns here. */
- lun = 0;
- retval = scsi_add_device(host, 0, 0, lun);
- if (retval < 0) {
- sbp2_send_management_orb(unit, sd->node_id, sd->generation,
- SBP2_LOGOUT_REQUEST, sd->login_id,
- NULL);
+ sdev = __scsi_add_device(shost, 0, 0,
+ scsilun_to_int(&eight_bytes_lun), lu);
+ if (IS_ERR(sdev)) {
+ sbp2_send_management_orb(lu, node_id, generation,
+ SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
/*
* Set this back to sbp2_login so we fall back and
* retry login on bus reset.
*/
- PREPARE_DELAYED_WORK(&sd->work, sbp2_login);
+ PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
+ } else {
+ lu->sdev = sdev;
+ scsi_device_put(sdev);
}
- kref_put(&sd->kref, release_sbp2_device);
+ kref_put(&lu->tgt->kref, sbp2_release_target);
}
-static int sbp2_probe(struct device *dev)
+static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
{
- 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;
- struct Scsi_Host *host;
- int i, key, value, err;
- u32 model, firmware_revision;
+ struct sbp2_logical_unit *lu;
- err = -ENOMEM;
- host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd));
- if (host == NULL)
- goto fail;
+ lu = kmalloc(sizeof(*lu), GFP_KERNEL);
+ if (!lu)
+ return -ENOMEM;
- sd = (struct sbp2_device *) host->hostdata;
- unit->device.driver_data = sd;
- sd->unit = unit;
- INIT_LIST_HEAD(&sd->orb_list);
- kref_init(&sd->kref);
+ lu->address_handler.length = 0x100;
+ lu->address_handler.address_callback = sbp2_status_write;
+ lu->address_handler.callback_data = lu;
- sd->address_handler.length = 0x100;
- sd->address_handler.address_callback = sbp2_status_write;
- sd->address_handler.callback_data = sd;
+ if (fw_core_add_address_handler(&lu->address_handler,
+ &fw_high_memory_region) < 0) {
+ kfree(lu);
+ return -ENOMEM;
+ }
- err = fw_core_add_address_handler(&sd->address_handler,
- &fw_high_memory_region);
- if (err < 0)
- goto fail_host;
+ lu->tgt = tgt;
+ lu->sdev = NULL;
+ lu->lun = lun_entry & 0xffff;
+ lu->retries = 0;
+ INIT_LIST_HEAD(&lu->orb_list);
+ INIT_DELAYED_WORK(&lu->work, sbp2_login);
- err = fw_device_enable_phys_dma(device);
- if (err < 0)
- goto fail_address_handler;
+ list_add_tail(&lu->link, &tgt->lu_list);
+ return 0;
+}
- err = scsi_add_host(host, &unit->device);
- if (err < 0)
- goto fail_address_handler;
+static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
+{
+ struct fw_csr_iterator ci;
+ int key, value;
- /*
- * 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);
+ 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;
+
+ 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_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 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->unit->device.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);
+ tgt->unit->device.bus_id,
+ w, firmware_revision, model);
+ tgt->workarounds = w;
+}
+
+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;
+
+ shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
+ if (shost == NULL)
+ return -ENOMEM;
+
+ tgt = (struct sbp2_target *)shost->hostdata;
+ unit->device.driver_data = tgt;
+ tgt->unit = unit;
+ kref_init(&tgt->kref);
+ INIT_LIST_HEAD(&tgt->lu_list);
+
+ if (fw_device_enable_phys_dma(device) < 0)
+ goto fail_shost_put;
+
+ if (scsi_add_host(shost, &unit->device) < 0)
+ goto fail_shost_put;
+
+ /* 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);
get_device(&unit->device);
* reschedule retries. Always get the ref before scheduling
* work.
*/
- INIT_DELAYED_WORK(&sd->work, sbp2_login);
- if (schedule_delayed_work(&sd->work, 0))
- kref_get(&sd->kref);
-
+ list_for_each_entry(lu, &tgt->lu_list, link)
+ if (queue_delayed_work(sbp2_wq, &lu->work, 0))
+ kref_get(&tgt->kref);
return 0;
- fail_address_handler:
- fw_core_remove_address_handler(&sd->address_handler);
- fail_host:
- scsi_host_put(host);
- fail:
- return err;
+ fail_tgt_put:
+ kref_put(&tgt->kref, sbp2_release_target);
+ 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;
-
- kref_put(&sd->kref, release_sbp2_device);
+ struct sbp2_target *tgt = unit->device.driver_data;
+ kref_put(&tgt->kref, sbp2_release_target);
return 0;
}
static void sbp2_reconnect(struct work_struct *work)
{
- struct sbp2_device *sd =
- container_of(work, struct sbp2_device, work.work);
- struct fw_unit *unit = sd->unit;
+ struct sbp2_logical_unit *lu =
+ container_of(work, struct sbp2_logical_unit, work.work);
+ struct fw_unit *unit = lu->tgt->unit;
struct fw_device *device = fw_device(unit->device.parent);
int generation, node_id, local_node_id;
node_id = device->node->node_id;
local_node_id = device->card->local_node->node_id;
- if (sbp2_send_management_orb(unit, node_id, generation,
+ if (sbp2_send_management_orb(lu, node_id, generation,
SBP2_RECONNECT_REQUEST,
- sd->login_id, NULL) < 0) {
- if (sd->retries++ >= 5) {
+ lu->login_id, NULL) < 0) {
+ if (lu->retries++ >= 5) {
fw_error("failed to reconnect to %s\n",
unit->device.bus_id);
/* Fall back and try to log in again. */
- sd->retries = 0;
- PREPARE_DELAYED_WORK(&sd->work, sbp2_login);
+ lu->retries = 0;
+ PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
}
- schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5));
+ queue_delayed_work(sbp2_wq, &lu->work, DIV_ROUND_UP(HZ, 5));
return;
}
- sd->generation = generation;
- sd->node_id = node_id;
- sd->address_high = local_node_id << 16;
+ lu->generation = generation;
+ lu->tgt->node_id = node_id;
+ lu->tgt->address_high = local_node_id << 16;
- fw_notify("reconnected to unit %s (%d retries)\n",
- unit->device.bus_id, sd->retries);
- sbp2_agent_reset(unit);
- sbp2_cancel_orbs(unit);
- kref_put(&sd->kref, release_sbp2_device);
+ fw_notify("reconnected to %s LUN %04x (%d retries)\n",
+ unit->device.bus_id, lu->lun, lu->retries);
+
+ sbp2_agent_reset(lu);
+ sbp2_cancel_orbs(lu);
+
+ kref_put(&lu->tgt->kref, sbp2_release_target);
}
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;
+ struct sbp2_target *tgt = unit->device.driver_data;
+ struct sbp2_logical_unit *lu;
- sd->retries = 0;
- fw_device_enable_phys_dma(device);
- if (schedule_delayed_work(&sd->work, 0))
- kref_get(&sd->kref);
+ 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) {
+ lu->retries = 0;
+ if (queue_delayed_work(sbp2_wq, &lu->work, 0))
+ kref_get(&tgt->kref);
+ }
}
#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
{
struct sbp2_command_orb *orb =
container_of(base_orb, struct sbp2_command_orb, base);
- struct fw_unit *unit = orb->unit;
- struct fw_device *device = fw_device(unit->device.parent);
+ struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent);
int result;
if (status != NULL) {
if (STATUS_GET_DEAD(*status))
- sbp2_agent_reset(unit);
+ sbp2_agent_reset(orb->lu);
switch (STATUS_GET_RESPONSE(*status)) {
case SBP2_STATUS_REQUEST_COMPLETE:
orb->done(orb->cmd);
}
-static int 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 sbp2_device *sd =
- (struct sbp2_device *)orb->cmd->device->host->hostdata;
- struct fw_unit *unit = sd->unit;
- struct fw_device *device = fw_device(unit->device.parent);
struct scatterlist *sg;
int sg_len, l, i, j, count;
dma_addr_t sg_addr;
* 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.high = lu->tgt->address_high;
orb->request.data_descriptor.low = sg_dma_address(sg);
- orb->request.misc |=
- COMMAND_ORB_DATA_SIZE(sg_dma_len(sg));
+ orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg));
return 0;
}
* initiator (i.e. us), but data_descriptor can refer to data
* on other nodes so we need to put our ID in descriptor.high.
*/
- orb->request.data_descriptor.high = sd->address_high;
+ orb->request.data_descriptor.high = lu->tgt->address_high;
orb->request.data_descriptor.low = orb->page_table_bus;
orb->request.misc |=
COMMAND_ORB_PAGE_TABLE_PRESENT |
static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
{
- struct sbp2_device *sd =
- (struct sbp2_device *)cmd->device->host->hostdata;
- struct fw_unit *unit = sd->unit;
- struct fw_device *device = fw_device(unit->device.parent);
+ 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 max_payload;
+ int retval = SCSI_MLQUEUE_HOST_BUSY;
/*
* Bidirectional commands are not yet implemented, and unknown
orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
if (orb == NULL) {
fw_notify("failed to alloc orb\n");
- goto fail_alloc;
+ return SCSI_MLQUEUE_HOST_BUSY;
}
/* 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.misc |=
COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA);
- if (scsi_sg_count(cmd) && sbp2_command_orb_map_scatterlist(orb) < 0)
- goto fail_mapping;
+ if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
+ goto out;
fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
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;
-
- sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation,
- sd->command_block_agent_address + SBP2_ORB_POINTER);
-
- kref_put(&orb->base.kref, free_orb);
- return 0;
+ goto out;
- fail_mapping:
+ 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);
- fail_alloc:
- return SCSI_MLQUEUE_HOST_BUSY;
+ return retval;
}
static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
{
- struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata;
+ struct sbp2_logical_unit *lu = sdev->hostdata;
sdev->allow_restart = 1;
- if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36)
+ 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 sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata;
- struct fw_unit *unit = sd->unit;
+ 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 (sd->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
+
+ 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 sbp2_device *sd =
- (struct sbp2_device *)cmd->device->host->hostdata;
- struct fw_unit *unit = sd->unit;
+ struct sbp2_logical_unit *lu = cmd->device->hostdata;
fw_notify("sbp2_scsi_abort\n");
- sbp2_agent_reset(unit);
- sbp2_cancel_orbs(unit);
+ sbp2_agent_reset(lu);
+ sbp2_cancel_orbs(lu);
return SUCCESS;
}
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
- struct sbp2_device *sd;
- struct fw_unit *unit;
+ struct sbp2_logical_unit *lu;
struct fw_device *device;
- u32 directory_id;
- struct fw_csr_iterator ci;
- int key, value, lun;
if (!sdev)
return 0;
- sd = (struct sbp2_device *)sdev->host->hostdata;
- unit = sd->unit;
- device = fw_device(unit->device.parent);
-
- /* implicit directory ID */
- directory_id = ((unit->directory - device->config_rom) * 4
- + CSR_CONFIG_ROM) & 0xffffff;
-
- /* explicit directory ID, overrides implicit ID if present */
- fw_csr_iterator_init(&ci, unit->directory);
- while (fw_csr_iterator_next(&ci, &key, &value))
- if (key == CSR_DIRECTORY_ID) {
- directory_id = value;
- break;
- }
- /* FIXME: Make this work for multi-lun devices. */
- lun = 0;
+ lu = sdev->hostdata;
+ device = fw_device(lu->tgt->unit->device.parent);
return sprintf(buf, "%08x%08x:%06x:%04x\n",
device->config_rom[3], device->config_rom[4],
- directory_id, lun);
+ lu->tgt->directory_id, lu->lun);
}
static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
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);
projects / firefly-linux-kernel-4.4.55.git / commitdiff