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firewire: fw-sbp2: add support for multiple logical units per target 

Fixes "New firewire stack only recognizing half of a chain of drives",
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=242254

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2007-08-25 14:05:28 +02:00
parent 1b34e97441
commit 5a3c2be6c9
2 changed files with 338 additions and 270 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/firewire/fw-device.h
View File

@ -102,11 +102,6 @@ fw_unit(struct device *dev)
#define CSR_INSTANCE 0x18 #define CSR_INSTANCE 0x18
#define CSR_DIRECTORY_ID 0x20 #define CSR_DIRECTORY_ID 0x20
#define SBP2_COMMAND_SET_SPECIFIER 0x38
#define SBP2_COMMAND_SET 0x39
#define SBP2_COMMAND_SET_REVISION 0x3b
#define SBP2_FIRMWARE_REVISION 0x3c
struct fw_csr_iterator { struct fw_csr_iterator {
u32 *p; u32 *p;
u32 *end; u32 *end;

603
drivers/firewire/fw-sbp2.c
View File

@ -41,7 +41,6 @@
#include <scsi/scsi.h> #include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h> #include <scsi/scsi_cmnd.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_device.h> #include <scsi/scsi_device.h>
#include <scsi/scsi_host.h> #include <scsi/scsi_host.h>
@ -66,31 +65,49 @@ typedef void (*scsi_done_fn_t)(struct scsi_cmnd *);
static const char sbp2_driver_name[] = "sbp2"; static const char sbp2_driver_name[] = "sbp2";
struct sbp2_device { /*
struct kref kref; * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry
struct fw_unit *unit; * 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 fw_address_handler address_handler;
struct list_head orb_list; struct list_head orb_list;
u64 management_agent_address;
u64 command_block_agent_address; u64 command_block_agent_address;
u32 workarounds; u16 lun;
int login_id; int login_id;
/* /*
* We cache these addresses and only update them once we've * The generation is updated once we've logged in or reconnected
* logged in or reconnected to the sbp2 device. That way, any * to the logical unit. Thus, I/O to the device will automatically
* IO to the device will automatically fail and get retried if * fail and get retried if it happens in a window where the device
* it happens in a window where the device is not ready to * is not ready, e.g. after a bus reset but before we reconnect.
* handle it (e.g. after a bus reset but before we reconnect).
*/ */
int node_id;
int address_high;
int generation; int generation;
int retries; int retries;
struct delayed_work work; 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_SG_ELEMENT_LENGTH 0xf000
#define SBP2_MAX_SECTORS 255 /* Max sectors supported */ #define SBP2_MAX_SECTORS 255 /* Max sectors supported */
#define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */
@ -101,10 +118,9 @@ struct sbp2_device {
#define SBP2_DIRECTION_FROM_MEDIA 0x1 #define SBP2_DIRECTION_FROM_MEDIA 0x1
/* Unit directory keys */ /* Unit directory keys */
#define SBP2_COMMAND_SET_SPECIFIER 0x38 #define SBP2_CSR_FIRMWARE_REVISION 0x3c
#define SBP2_COMMAND_SET 0x39 #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14
#define SBP2_COMMAND_SET_REVISION 0x3b #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4
#define SBP2_FIRMWARE_REVISION 0x3c
/* Flags for detected oddities and brokeness */ /* Flags for detected oddities and brokeness */
#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1
@ -219,7 +235,7 @@ struct sbp2_command_orb {
} request; } request;
struct scsi_cmnd *cmd; struct scsi_cmnd *cmd;
scsi_done_fn_t done; scsi_done_fn_t done;
struct fw_unit *unit; struct sbp2_logical_unit *lu;
struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
dma_addr_t page_table_bus; dma_addr_t page_table_bus;
@ -295,7 +311,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request,
unsigned long long offset, unsigned long long offset,
void *payload, size_t length, void *callback_data) 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_orb *orb;
struct sbp2_status status; struct sbp2_status status;
size_t header_size; size_t header_size;
@ -319,7 +335,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request,
/* Lookup the orb corresponding to this status write. */ /* Lookup the orb corresponding to this status write. */
spin_lock_irqsave(&card->lock, flags); 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 && if (STATUS_GET_ORB_HIGH(status) == 0 &&
STATUS_GET_ORB_LOW(status) == orb->request_bus) { STATUS_GET_ORB_LOW(status) == orb->request_bus) {
orb->rcode = RCODE_COMPLETE; orb->rcode = RCODE_COMPLETE;
@ -329,7 +345,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request,
} }
spin_unlock_irqrestore(&card->lock, flags); spin_unlock_irqrestore(&card->lock, flags);
if (&orb->link != &sd->orb_list) if (&orb->link != &lu->orb_list)
orb->callback(orb, &status); orb->callback(orb, &status);
else else
fw_error("status write for unknown orb\n"); fw_error("status write for unknown orb\n");
@ -371,11 +387,10 @@ complete_transaction(struct fw_card *card, int rcode,
} }
static void 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) int node_id, int generation, u64 offset)
{ {
struct fw_device *device = fw_device(unit->device.parent); struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct sbp2_device *sd = unit->device.driver_data;
unsigned long flags; unsigned long flags;
orb->pointer.high = 0; orb->pointer.high = 0;
@ -383,7 +398,7 @@ sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit,
fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer));
spin_lock_irqsave(&device->card->lock, flags); 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); spin_unlock_irqrestore(&device->card->lock, flags);
/* Take a ref for the orb list and for the transaction callback. */ /* Take a ref for the orb list and for the transaction callback. */
@ -396,10 +411,9 @@ sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit,
complete_transaction, orb); 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 fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct sbp2_device *sd = unit->device.driver_data;
struct sbp2_orb *orb, *next; struct sbp2_orb *orb, *next;
struct list_head list; struct list_head list;
unsigned long flags; unsigned long flags;
@ -407,7 +421,7 @@ static int sbp2_cancel_orbs(struct fw_unit *unit)
INIT_LIST_HEAD(&list); INIT_LIST_HEAD(&list);
spin_lock_irqsave(&device->card->lock, flags); 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); spin_unlock_irqrestore(&device->card->lock, flags);
list_for_each_entry_safe(orb, next, &list, link) { list_for_each_entry_safe(orb, next, &list, link) {
@ -434,11 +448,11 @@ complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
} }
static int static int
sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
int function, int lun, void *response) int generation, int function, int lun_or_login_id,
void *response)
{ {
struct fw_device *device = fw_device(unit->device.parent); struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct sbp2_device *sd = unit->device.driver_data;
struct sbp2_management_orb *orb; struct sbp2_management_orb *orb;
int retval = -ENOMEM; int retval = -ENOMEM;
@ -459,12 +473,12 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
orb->request.misc = orb->request.misc =
MANAGEMENT_ORB_NOTIFY | MANAGEMENT_ORB_NOTIFY |
MANAGEMENT_ORB_FUNCTION(function) | MANAGEMENT_ORB_FUNCTION(function) |
MANAGEMENT_ORB_LUN(lun); MANAGEMENT_ORB_LUN(lun_or_login_id);
orb->request.length = orb->request.length =
MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response));
orb->request.status_fifo.high = sd->address_handler.offset >> 32; orb->request.status_fifo.high = lu->address_handler.offset >> 32;
orb->request.status_fifo.low = sd->address_handler.offset; orb->request.status_fifo.low = lu->address_handler.offset;
if (function == SBP2_LOGIN_REQUEST) { if (function == SBP2_LOGIN_REQUEST) {
orb->request.misc |= orb->request.misc |=
@ -483,14 +497,14 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
if (dma_mapping_error(orb->base.request_bus)) if (dma_mapping_error(orb->base.request_bus))
goto fail_mapping_request; goto fail_mapping_request;
sbp2_send_orb(&orb->base, unit, sbp2_send_orb(&orb->base, lu, node_id, generation,
node_id, generation, sd->management_agent_address); lu->tgt->management_agent_address);
wait_for_completion_timeout(&orb->done, wait_for_completion_timeout(&orb->done,
msecs_to_jiffies(SBP2_ORB_TIMEOUT)); msecs_to_jiffies(SBP2_ORB_TIMEOUT));
retval = -EIO; retval = -EIO;
if (sbp2_cancel_orbs(unit) == 0) { if (sbp2_cancel_orbs(lu) == 0) {
fw_error("orb reply timed out, rcode=0x%02x\n", fw_error("orb reply timed out, rcode=0x%02x\n",
orb->base.rcode); orb->base.rcode);
goto out; goto out;
@ -535,10 +549,9 @@ complete_agent_reset_write(struct fw_card *card, int rcode,
kfree(t); 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 fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct sbp2_device *sd = unit->device.driver_data;
struct fw_transaction *t; struct fw_transaction *t;
static u32 zero; static u32 zero;
@ -547,181 +560,261 @@ static int sbp2_agent_reset(struct fw_unit *unit)
return -ENOMEM; return -ENOMEM;
fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
sd->node_id, sd->generation, device->max_speed, lu->tgt->node_id, lu->generation, device->max_speed,
sd->command_block_agent_address + SBP2_AGENT_RESET, lu->command_block_agent_address + SBP2_AGENT_RESET,
&zero, sizeof(zero), complete_agent_reset_write, t); &zero, sizeof(zero), complete_agent_reset_write, t);
return 0; return 0;
} }
static void sbp2_reconnect(struct work_struct *work); static void sbp2_release_target(struct kref *kref)
static struct scsi_host_template scsi_driver_template;
static void release_sbp2_device(struct kref *kref)
{ {
struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref); struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref);
struct Scsi_Host *host = struct sbp2_logical_unit *lu, *next;
container_of((void *)sd, struct Scsi_Host, hostdata[0]); struct Scsi_Host *shost =
container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
scsi_remove_host(host); list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation, if (lu->sdev)
SBP2_LOGOUT_REQUEST, sd->login_id, NULL); scsi_remove_device(lu->sdev);
fw_core_remove_address_handler(&sd->address_handler);
fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id); sbp2_send_management_orb(lu, tgt->node_id, lu->generation,
put_device(&sd->unit->device); SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
scsi_host_put(host); 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 void sbp2_reconnect(struct work_struct *work);
static void sbp2_login(struct work_struct *work) static void sbp2_login(struct work_struct *work)
{ {
struct sbp2_device *sd = struct sbp2_logical_unit *lu =
container_of(work, struct sbp2_device, work.work); container_of(work, struct sbp2_logical_unit, work.work);
struct Scsi_Host *host = struct Scsi_Host *shost =
container_of((void *)sd, struct Scsi_Host, hostdata[0]); container_of((void *)lu->tgt, struct Scsi_Host, hostdata[0]);
struct fw_unit *unit = sd->unit; 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 fw_device *device = fw_device(unit->device.parent);
struct sbp2_login_response response; struct sbp2_login_response response;
int generation, node_id, local_node_id, lun, retval; int generation, node_id, local_node_id;
/* FIXME: Make this work for multi-lun devices. */
lun = 0;
generation = device->card->generation; generation = device->card->generation;
node_id = device->node->node_id; node_id = device->node->node_id;
local_node_id = device->card->local_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_LOGIN_REQUEST, lun, &response) < 0) { SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
if (sd->retries++ < 5) { if (lu->retries++ < 5) {
schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5));
} else { } else {
fw_error("failed to login to %s\n", fw_error("failed to login to %s LUN %04x\n",
unit->device.bus_id); unit->device.bus_id, lu->lun);
kref_put(&sd->kref, release_sbp2_device); kref_put(&lu->tgt->kref, sbp2_release_target);
} }
return; return;
} }
sd->generation = generation; lu->generation = generation;
sd->node_id = node_id; lu->tgt->node_id = node_id;
sd->address_high = local_node_id << 16; lu->tgt->address_high = local_node_id << 16;
/* Get command block agent offset and login id. */ /* 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) | ((u64) (response.command_block_agent.high & 0xffff) << 32) |
response.command_block_agent.low; 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", fw_notify("logged in to %s LUN %04x (%d retries)\n",
unit->device.bus_id, sd->retries); unit->device.bus_id, lu->lun, lu->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);
#if 0 #if 0
/* FIXME: The linux1394 sbp2 does this last step. */ /* FIXME: The linux1394 sbp2 does this last step. */
sbp2_set_busy_timeout(scsi_id); sbp2_set_busy_timeout(scsi_id);
#endif #endif
PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect); PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
sbp2_agent_reset(unit); sbp2_agent_reset(lu);
/* FIXME: Loop over luns here. */ memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
lun = 0; eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff;
retval = scsi_add_device(host, 0, 0, lun); eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff;
if (retval < 0) {
sbp2_send_management_orb(unit, sd->node_id, sd->generation, sdev = __scsi_add_device(shost, 0, 0,
SBP2_LOGOUT_REQUEST, sd->login_id, scsilun_to_int(&eight_bytes_lun), lu);
NULL); 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 * Set this back to sbp2_login so we fall back and
* retry login on bus reset. * 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_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->sdev = NULL;
lu->lun = lun_entry & 0xffff;
lu->retries = 0;
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;
fw_csr_iterator_init(&ci, directory);
while (fw_csr_iterator_next(&ci, &key, &value)) {
switch (key) {
case CSR_DEPENDENT_INFO | CSR_OFFSET:
tgt->management_agent_address =
CSR_REGISTER_BASE + 4 * value;
break;
case CSR_DIRECTORY_ID:
tgt->directory_id = value;
break;
case CSR_MODEL:
*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;
tgt->workarounds = 0;
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;
tgt->workarounds |= sbp2_workarounds_table[i].workarounds;
break;
}
if (tgt->workarounds)
fw_notify("Workarounds for %s: 0x%x "
"(firmware_revision 0x%06x, model_id 0x%06x)\n",
tgt->unit->device.bus_id,
tgt->workarounds, firmware_revision, model);
}
static struct scsi_host_template scsi_driver_template;
static int sbp2_probe(struct device *dev) static int sbp2_probe(struct device *dev)
{ {
struct fw_unit *unit = fw_unit(dev); struct fw_unit *unit = fw_unit(dev);
struct fw_device *device = fw_device(unit->device.parent); struct fw_device *device = fw_device(unit->device.parent);
struct sbp2_device *sd; struct sbp2_target *tgt;
struct fw_csr_iterator ci; struct sbp2_logical_unit *lu;
struct Scsi_Host *host; struct Scsi_Host *shost;
int i, key, value, err;
u32 model, firmware_revision; u32 model, firmware_revision;
err = -ENOMEM; shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd)); if (shost == NULL)
if (host == NULL) return -ENOMEM;
goto fail;
sd = (struct sbp2_device *) host->hostdata; tgt = (struct sbp2_target *)shost->hostdata;
unit->device.driver_data = sd; unit->device.driver_data = tgt;
sd->unit = unit; tgt->unit = unit;
INIT_LIST_HEAD(&sd->orb_list); kref_init(&tgt->kref);
kref_init(&sd->kref); INIT_LIST_HEAD(&tgt->lu_list);
sd->address_handler.length = 0x100; if (fw_device_enable_phys_dma(device) < 0)
sd->address_handler.address_callback = sbp2_status_write; goto fail_shost_put;
sd->address_handler.callback_data = sd;
err = fw_core_add_address_handler(&sd->address_handler, if (scsi_add_host(shost, &unit->device) < 0)
&fw_high_memory_region); goto fail_shost_put;
if (err < 0)
goto fail_host;
err = fw_device_enable_phys_dma(device); /* Initialize to values that won't match anything in our table. */
if (err < 0)
goto fail_address_handler;
err = scsi_add_host(host, &unit->device);
if (err < 0)
goto fail_address_handler;
/*
* 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; firmware_revision = 0xff000000;
model = 0xff000000; model = 0xff000000;
fw_csr_iterator_init(&ci, unit->directory);
while (fw_csr_iterator_next(&ci, &key, &value)) {
switch (key) {
case CSR_DEPENDENT_INFO | CSR_OFFSET:
sd->management_agent_address =
0xfffff0000000ULL + 4 * value;
break;
case SBP2_FIRMWARE_REVISION:
firmware_revision = value;
break;
case CSR_MODEL:
model = value;
break;
}
}
for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { /* implicit directory ID */
if (sbp2_workarounds_table[i].firmware_revision != tgt->directory_id = ((unit->directory - device->config_rom) * 4
(firmware_revision & 0xffffff00)) + CSR_CONFIG_ROM) & 0xffffff;
continue;
if (sbp2_workarounds_table[i].model != model &&
sbp2_workarounds_table[i].model != ~0)
continue;
sd->workarounds |= sbp2_workarounds_table[i].workarounds;
break;
}
if (sd->workarounds) if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
fw_notify("Workarounds for node %s: 0x%x " &firmware_revision) < 0)
"(firmware_revision 0x%06x, model_id 0x%06x)\n", goto fail_tgt_put;
unit->device.bus_id,
sd->workarounds, firmware_revision, model); sbp2_init_workarounds(tgt, model, firmware_revision);
get_device(&unit->device); get_device(&unit->device);
@ -730,35 +823,34 @@ static int sbp2_probe(struct device *dev)
* reschedule retries. Always get the ref before scheduling * reschedule retries. Always get the ref before scheduling
* work. * work.
*/ */
INIT_DELAYED_WORK(&sd->work, sbp2_login); list_for_each_entry(lu, &tgt->lu_list, link)
if (schedule_delayed_work(&sd->work, 0)) if (schedule_delayed_work(&lu->work, 0))
kref_get(&sd->kref); kref_get(&tgt->kref);
return 0; return 0;
fail_address_handler: fail_tgt_put:
fw_core_remove_address_handler(&sd->address_handler); kref_put(&tgt->kref, sbp2_release_target);
fail_host: return -ENOMEM;
scsi_host_put(host);
fail: fail_shost_put:
return err; scsi_host_put(shost);
return -ENOMEM;
} }
static int sbp2_remove(struct device *dev) static int sbp2_remove(struct device *dev)
{ {
struct fw_unit *unit = fw_unit(dev); struct fw_unit *unit = fw_unit(dev);
struct sbp2_device *sd = unit->device.driver_data; struct sbp2_target *tgt = unit->device.driver_data;
kref_put(&sd->kref, release_sbp2_device);
kref_put(&tgt->kref, sbp2_release_target);
return 0; return 0;
} }
static void sbp2_reconnect(struct work_struct *work) static void sbp2_reconnect(struct work_struct *work)
{ {
struct sbp2_device *sd = struct sbp2_logical_unit *lu =
container_of(work, struct sbp2_device, work.work); container_of(work, struct sbp2_logical_unit, work.work);
struct fw_unit *unit = sd->unit; struct fw_unit *unit = lu->tgt->unit;
struct fw_device *device = fw_device(unit->device.parent); struct fw_device *device = fw_device(unit->device.parent);
int generation, node_id, local_node_id; int generation, node_id, local_node_id;
@ -766,40 +858,49 @@ static void sbp2_reconnect(struct work_struct *work)
node_id = device->node->node_id; node_id = device->node->node_id;
local_node_id = device->card->local_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, SBP2_RECONNECT_REQUEST,
sd->login_id, NULL) < 0) { lu->login_id, NULL) < 0) {
if (sd->retries++ >= 5) { if (lu->retries++ >= 5) {
fw_error("failed to reconnect to %s\n", fw_error("failed to reconnect to %s\n",
unit->device.bus_id); unit->device.bus_id);
/* Fall back and try to log in again. */ /* Fall back and try to log in again. */
sd->retries = 0; lu->retries = 0;
PREPARE_DELAYED_WORK(&sd->work, sbp2_login); PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
} }
schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5));
return; return;
} }
sd->generation = generation; lu->generation = generation;
sd->node_id = node_id; lu->tgt->node_id = node_id;
sd->address_high = local_node_id << 16; lu->tgt->address_high = local_node_id << 16;
fw_notify("reconnected to unit %s (%d retries)\n", fw_notify("reconnected to %s LUN %04x (%d retries)\n",
unit->device.bus_id, sd->retries); unit->device.bus_id, lu->lun, lu->retries);
sbp2_agent_reset(unit);
sbp2_cancel_orbs(unit); sbp2_agent_reset(lu);
kref_put(&sd->kref, release_sbp2_device); sbp2_cancel_orbs(lu);
kref_put(&lu->tgt->kref, sbp2_release_target);
} }
static void sbp2_update(struct fw_unit *unit) static void sbp2_update(struct fw_unit *unit)
{ {
struct fw_device *device = fw_device(unit->device.parent); struct sbp2_target *tgt = unit->device.driver_data;
struct sbp2_device *sd = unit->device.driver_data; struct sbp2_logical_unit *lu;
sd->retries = 0; fw_device_enable_phys_dma(fw_device(unit->device.parent));
fw_device_enable_phys_dma(device);
if (schedule_delayed_work(&sd->work, 0)) /*
kref_get(&sd->kref); * 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 (schedule_delayed_work(&lu->work, 0))
kref_get(&tgt->kref);
}
} }
#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
@ -869,13 +970,12 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
{ {
struct sbp2_command_orb *orb = struct sbp2_command_orb *orb =
container_of(base_orb, struct sbp2_command_orb, base); container_of(base_orb, struct sbp2_command_orb, base);
struct fw_unit *unit = orb->unit; struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent);
struct fw_device *device = fw_device(unit->device.parent);
int result; int result;
if (status != NULL) { if (status != NULL) {
if (STATUS_GET_DEAD(*status)) if (STATUS_GET_DEAD(*status))
sbp2_agent_reset(unit); sbp2_agent_reset(orb->lu);
switch (STATUS_GET_RESPONSE(*status)) { switch (STATUS_GET_RESPONSE(*status)) {
case SBP2_STATUS_REQUEST_COMPLETE: case SBP2_STATUS_REQUEST_COMPLETE:
@ -919,12 +1019,10 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
orb->done(orb->cmd); 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; struct scatterlist *sg;
int sg_len, l, i, j, count; int sg_len, l, i, j, count;
dma_addr_t sg_addr; dma_addr_t sg_addr;
@ -943,10 +1041,9 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
* tables. * tables.
*/ */
if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { 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.data_descriptor.low = sg_dma_address(sg);
orb->request.misc |= orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg));
COMMAND_ORB_DATA_SIZE(sg_dma_len(sg));
return 0; return 0;
} }
@ -990,7 +1087,7 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
* initiator (i.e. us), but data_descriptor can refer to data * 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 = sd->address_high; orb->request.data_descriptor.high = lu->tgt->address_high;
orb->request.data_descriptor.low = orb->page_table_bus; orb->request.data_descriptor.low = orb->page_table_bus;
orb->request.misc |= orb->request.misc |=
COMMAND_ORB_PAGE_TABLE_PRESENT | COMMAND_ORB_PAGE_TABLE_PRESENT |
@ -1009,12 +1106,11 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
{ {
struct sbp2_device *sd = struct sbp2_logical_unit *lu = cmd->device->hostdata;
(struct sbp2_device *)cmd->device->host->hostdata; struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct fw_unit *unit = sd->unit;
struct fw_device *device = fw_device(unit->device.parent);
struct sbp2_command_orb *orb; struct sbp2_command_orb *orb;
unsigned max_payload; unsigned max_payload;
int retval = SCSI_MLQUEUE_HOST_BUSY;
/* /*
* Bidirectional commands are not yet implemented, and unknown * Bidirectional commands are not yet implemented, and unknown
@ -1030,14 +1126,14 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
orb = kzalloc(sizeof(*orb), GFP_ATOMIC); orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
if (orb == NULL) { if (orb == NULL) {
fw_notify("failed to alloc orb\n"); fw_notify("failed to alloc orb\n");
goto fail_alloc; return SCSI_MLQUEUE_HOST_BUSY;
} }
/* Initialize rcode to something not RCODE_COMPLETE. */ /* Initialize rcode to something not RCODE_COMPLETE. */
orb->base.rcode = -1; orb->base.rcode = -1;
kref_init(&orb->base.kref); kref_init(&orb->base.kref);
orb->unit = unit; orb->lu = lu;
orb->done = done; orb->done = done;
orb->cmd = cmd; orb->cmd = cmd;
@ -1063,8 +1159,8 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
orb->request.misc |= orb->request.misc |=
COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA);
if (scsi_sg_count(cmd) && sbp2_command_orb_map_scatterlist(orb) < 0) if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
goto fail_mapping; goto out;
fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
@ -1077,49 +1173,47 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
dma_map_single(device->card->device, &orb->request, dma_map_single(device->card->device, &orb->request,
sizeof(orb->request), DMA_TO_DEVICE); sizeof(orb->request), DMA_TO_DEVICE);
if (dma_mapping_error(orb->base.request_bus)) if (dma_mapping_error(orb->base.request_bus))
goto fail_mapping; goto out;
sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation,
sd->command_block_agent_address + SBP2_ORB_POINTER);
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); kref_put(&orb->base.kref, free_orb);
return 0; return retval;
fail_mapping:
kref_put(&orb->base.kref, free_orb);
fail_alloc:
return SCSI_MLQUEUE_HOST_BUSY;
} }
static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) 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; sdev->allow_restart = 1;
if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
sdev->inquiry_len = 36; sdev->inquiry_len = 36;
return 0; return 0;
} }
static int sbp2_scsi_slave_configure(struct scsi_device *sdev) static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
{ {
struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; struct sbp2_logical_unit *lu = sdev->hostdata;
struct fw_unit *unit = sd->unit;
sdev->use_10_for_rw = 1; sdev->use_10_for_rw = 1;
if (sdev->type == TYPE_ROM) if (sdev->type == TYPE_ROM)
sdev->use_10_for_ms = 1; sdev->use_10_for_ms = 1;
if (sdev->type == TYPE_DISK && 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; 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; 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); blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
return 0; return 0;
} }
@ -1129,13 +1223,11 @@ static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
*/ */
static int sbp2_scsi_abort(struct scsi_cmnd *cmd) static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
{ {
struct sbp2_device *sd = struct sbp2_logical_unit *lu = cmd->device->hostdata;
(struct sbp2_device *)cmd->device->host->hostdata;
struct fw_unit *unit = sd->unit;
fw_notify("sbp2_scsi_abort\n"); fw_notify("sbp2_scsi_abort\n");
sbp2_agent_reset(unit); sbp2_agent_reset(lu);
sbp2_cancel_orbs(unit); sbp2_cancel_orbs(lu);
return SUCCESS; return SUCCESS;
} }
@ -1152,37 +1244,18 @@ sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr,
char *buf) char *buf)
{ {
struct scsi_device *sdev = to_scsi_device(dev); struct scsi_device *sdev = to_scsi_device(dev);
struct sbp2_device *sd; struct sbp2_logical_unit *lu;
struct fw_unit *unit;
struct fw_device *device; struct fw_device *device;
u32 directory_id;
struct fw_csr_iterator ci;
int key, value, lun;
if (!sdev) if (!sdev)
return 0; return 0;
sd = (struct sbp2_device *)sdev->host->hostdata;
unit = sd->unit;
device = fw_device(unit->device.parent);
/* implicit directory ID */ lu = sdev->hostdata;
directory_id = ((unit->directory - device->config_rom) * 4 device = fw_device(lu->tgt->unit->device.parent);
+ 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;
return sprintf(buf, "%08x%08x:%06x:%04x\n", return sprintf(buf, "%08x%08x:%06x:%04x\n",
device->config_rom[3], device->config_rom[4], 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 DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);