*/
#include <linux/blkdev.h>
+#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
int address_high;
unsigned int workarounds;
unsigned int mgt_orb_timeout;
+ unsigned int max_payload;
int dont_block; /* counter for each logical unit */
int blocked; /* ditto */
};
+/* Impossible login_id, to detect logout attempt before successful login */
+#define INVALID_LOGIN_ID 0x10000
+
/*
* 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
#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_MAX_SG_ELEMENT_LENGTH 0xf000
#define SBP2_RETRY_LIMIT 0xf /* 15 retries */
#define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */
+/*
+ * The default maximum s/g segment size of a FireWire controller is
+ * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to
+ * be quadlet-aligned, we set the length limit to 0xffff & ~3.
+ */
+#define SBP2_MAX_SEG_SIZE 0xfffc
+
/* Unit directory keys */
#define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a
#define SBP2_CSR_FIRMWARE_REVISION 0x3c
dma_addr_t page_table_bus;
};
+#define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */
+#define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */
+
/*
* List of devices with known bugs.
*
* The firmware_revision field, masked with 0xffff00, is the best
* indicator for the type of bridge chip of a device. It yields a few
* false positives but this did not break correctly behaving devices
- * so far. We use ~0 as a wildcard, since the 24 bit values we get
- * from the config rom can never match that.
+ * so far.
*/
static const struct {
u32 firmware_revision;
},
/* Initio bridges, actually only needed for some older ones */ {
.firmware_revision = 0x000200,
- .model = ~0,
+ .model = SBP2_ROM_VALUE_WILDCARD,
.workarounds = SBP2_WORKAROUND_INQUIRY_36,
},
/* PL-3507 bridge with Prolific firmware */ {
.firmware_revision = 0x012800,
- .model = ~0,
+ .model = SBP2_ROM_VALUE_WILDCARD,
.workarounds = SBP2_WORKAROUND_POWER_CONDITION,
},
/* Symbios bridge */ {
.firmware_revision = 0xa0b800,
- .model = ~0,
+ .model = SBP2_ROM_VALUE_WILDCARD,
.workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
},
/* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
.firmware_revision = 0x002600,
- .model = ~0,
+ .model = SBP2_ROM_VALUE_WILDCARD,
.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.
+ * iPod 2nd generation: needs 128k max transfer size workaround
+ * iPod 3rd generation: needs fix capacity workaround
*/
-
- /* iPod 4th generation. */ {
+ {
+ .firmware_revision = 0x0a2700,
+ .model = 0x000000,
+ .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS |
+ SBP2_WORKAROUND_FIX_CAPACITY,
+ },
+ /* iPod 4th generation */ {
.firmware_revision = 0x0a2700,
.model = 0x000021,
.workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
},
/* iPod mini */ {
.firmware_revision = 0x0a2700,
+ .model = 0x000022,
+ .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
+ },
+ /* iPod mini */ {
+ .firmware_revision = 0x0a2700,
.model = 0x000023,
.workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
},
}
};
-static void
-free_orb(struct kref *kref)
+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)
+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_logical_unit *lu = callback_data;
struct sbp2_orb *orb;
fw_send_response(card, request, RCODE_COMPLETE);
}
-static void
-complete_transaction(struct fw_card *card, int rcode,
- void *payload, size_t length, void *data)
+static void complete_transaction(struct fw_card *card, int rcode,
+ void *payload, size_t length, void *data)
{
struct sbp2_orb *orb = data;
unsigned long flags;
kref_put(&orb->kref, free_orb);
}
-static void
-sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu,
- int node_id, int generation, u64 offset)
+static void 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(lu->tgt->unit->device.parent);
unsigned long flags;
return retval;
}
-static void
-complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
+static void complete_management_orb(struct sbp2_orb *base_orb,
+ struct sbp2_status *status)
{
struct sbp2_management_orb *orb =
container_of(base_orb, struct sbp2_management_orb, base);
complete(&orb->done);
}
-static int
-sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
- int generation, int function, int lun_or_login_id,
- void *response)
+static int 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(lu->tgt->unit->device.parent);
struct sbp2_management_orb *orb;
return retval;
}
-static void
-complete_agent_reset_write(struct fw_card *card, int rcode,
- void *payload, size_t length, void *done)
-{
- complete(done);
-}
-
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;
+ __be32 d = 0;
- 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);
+ fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
+ lu->tgt->node_id, lu->generation, device->max_speed,
+ lu->command_block_agent_address + SBP2_AGENT_RESET,
+ &d, sizeof(d));
}
-static void
-complete_agent_reset_write_no_wait(struct fw_card *card, int rcode,
- void *payload, size_t length, void *data)
+static void complete_agent_reset_write_no_wait(struct fw_card *card,
+ int rcode, void *payload, size_t length, void *data)
{
kfree(data);
}
{
struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct fw_transaction *t;
- static u32 z;
+ static __be32 d;
t = kmalloc(sizeof(*t), GFP_ATOMIC);
if (t == NULL)
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_no_wait, t);
-}
-
-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);
+ &d, sizeof(d), complete_agent_reset_write_no_wait, t);
}
static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
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);
-
+ if (lu->login_id != INVALID_LOGIN_ID) {
+ int generation, node_id;
+ /*
+ * tgt->node_id may be obsolete here if we failed
+ * during initial login or after a bus reset where
+ * the topology changed.
+ */
+ generation = device->generation;
+ smp_rmb(); /* node_id vs. generation */
+ node_id = device->node_id;
+ sbp2_send_management_orb(lu, node_id, generation,
+ SBP2_LOGOUT_REQUEST,
+ lu->login_id, NULL);
+ }
fw_core_remove_address_handler(&lu->address_handler);
list_del(&lu->link);
kfree(lu);
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)
+/*
+ * 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)
{
- complete(done);
+ kref_get(&lu->tgt->kref);
+ if (!queue_delayed_work(sbp2_wq, &lu->work, delay))
+ sbp2_target_put(lu->tgt);
}
/*
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);
+ __be32 d = 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);
+ fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
+ lu->tgt->node_id, lu->generation, device->max_speed,
+ CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT,
+ &d, sizeof(d));
}
static void sbp2_reconnect(struct work_struct *work);
goto out;
generation = device->generation;
- smp_rmb(); /* node_id must not be older than generation */
+ smp_rmb(); /* node IDs must not be older than generation */
node_id = device->node_id;
local_node_id = device->card->node_id;
tgt->node_id = node_id;
tgt->address_high = local_node_id << 16;
- sbp2_set_generation(lu, generation);
+ smp_wmb(); /* node IDs must not be older than generation */
+ lu->generation = generation;
lu->command_block_agent_address =
((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
lu->tgt = tgt;
lu->lun = lun_entry & 0xffff;
+ lu->login_id = INVALID_LOGIN_ID;
lu->retries = 0;
lu->has_sdev = false;
lu->blocked = false;
continue;
if (sbp2_workarounds_table[i].model != model &&
- sbp2_workarounds_table[i].model != ~0)
+ sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD)
continue;
w |= sbp2_workarounds_table[i].workarounds;
struct Scsi_Host *shost;
u32 model, firmware_revision;
+ if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE)
+ BUG_ON(dma_set_max_seg_size(device->card->device,
+ SBP2_MAX_SEG_SIZE));
+
shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
if (shost == NULL)
return -ENOMEM;
tgt->unit = unit;
kref_init(&tgt->kref);
INIT_LIST_HEAD(&tgt->lu_list);
- tgt->bus_id = unit->device.bus_id;
+ tgt->bus_id = dev_name(&unit->device);
tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
if (fw_device_enable_phys_dma(device) < 0)
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;
+ firmware_revision = SBP2_ROM_VALUE_MISSING;
+ model = SBP2_ROM_VALUE_MISSING;
+
if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
&firmware_revision) < 0)
goto fail_tgt_put;
sbp2_init_workarounds(tgt, model, firmware_revision);
+ /*
+ * At S100 we can do 512 bytes per packet, at S200 1024 bytes,
+ * and so on up to 4096 bytes. 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.
+ */
+ tgt->max_payload = min(device->max_speed + 7, 10U);
+ tgt->max_payload = min(tgt->max_payload, device->card->max_receive - 1);
+
/* 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);
+ sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
return 0;
fail_tgt_put:
goto out;
generation = device->generation;
- smp_rmb(); /* node_id must not be older than generation */
+ smp_rmb(); /* node IDs must not be older than generation */
node_id = device->node_id;
local_node_id = device->card->node_id;
tgt->node_id = node_id;
tgt->address_high = local_node_id << 16;
- sbp2_set_generation(lu, generation);
+ smp_wmb(); /* node IDs must not be older than generation */
+ lu->generation = generation;
fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
tgt->bus_id, lu->lun, lu->retries);
.id_table = sbp2_id_table,
};
-static unsigned int
-sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
+static void sbp2_unmap_scatterlist(struct device *card_device,
+ struct sbp2_command_orb *orb)
+{
+ if (scsi_sg_count(orb->cmd))
+ dma_unmap_sg(card_device, scsi_sglist(orb->cmd),
+ scsi_sg_count(orb->cmd),
+ orb->cmd->sc_data_direction);
+
+ if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT))
+ dma_unmap_single(card_device, orb->page_table_bus,
+ sizeof(orb->page_table), DMA_TO_DEVICE);
+}
+
+static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
{
int sam_status;
}
}
-static void
-complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
+static void complete_command_orb(struct sbp2_orb *base_orb,
+ struct sbp2_status *status)
{
struct sbp2_command_orb *orb =
container_of(base_orb, struct sbp2_command_orb, base);
dma_unmap_single(device->card->device, orb->base.request_bus,
sizeof(orb->request), DMA_TO_DEVICE);
-
- 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), DMA_TO_DEVICE);
+ sbp2_unmap_scatterlist(device->card->device, orb);
orb->cmd->result = result;
orb->done(orb->cmd);
}
-static int
-sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device,
- struct sbp2_logical_unit *lu)
+static int sbp2_map_scatterlist(struct sbp2_command_orb *orb,
+ struct fw_device *device, struct sbp2_logical_unit *lu)
{
- struct scatterlist *sg;
- int sg_len, l, i, j, count;
- dma_addr_t sg_addr;
-
- 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)
+ struct scatterlist *sg = scsi_sglist(orb->cmd);
+ int i, n;
+
+ n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
+ orb->cmd->sc_data_direction);
+ if (n == 0)
goto fail;
/*
* as the second generation iPod which doesn't support page
* tables.
*/
- if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) {
+ if (n == 1) {
orb->request.data_descriptor.high =
cpu_to_be32(lu->tgt->address_high);
orb->request.data_descriptor.low =
return 0;
}
- /*
- * 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 = cpu_to_be32(sg_addr);
- orb->page_table[j].high = cpu_to_be32(l << 16);
- sg_addr += l;
- sg_len -= l;
- j++;
- }
+ for_each_sg(sg, sg, n, i) {
+ orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16);
+ orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg));
}
orb->page_table_bus =
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));
+ COMMAND_ORB_DATA_SIZE(n));
return 0;
fail_page_table:
- dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
- orb->cmd->sc_data_direction);
+ dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
+ scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction);
fail:
return -ENOMEM;
}
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;
+ int generation, retval = SCSI_MLQUEUE_HOST_BUSY;
/*
* Bidirectional commands are not yet implemented, and unknown
orb->done = done;
orb->cmd = cmd;
- 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.
- */
- max_payload = min(device->max_speed + 7,
- device->card->max_receive - 1);
+ orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL);
orb->request.misc = cpu_to_be32(
- COMMAND_ORB_MAX_PAYLOAD(max_payload) |
+ COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) |
COMMAND_ORB_SPEED(device->max_speed) |
COMMAND_ORB_NOTIFY);
if (cmd->sc_data_direction == DMA_FROM_DEVICE)
orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
+ generation = device->generation;
+ smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */
+
if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
goto out;
orb->base.request_bus =
dma_map_single(device->card->device, &orb->request,
sizeof(orb->request), DMA_TO_DEVICE);
- if (dma_mapping_error(device->card->device, orb->base.request_bus))
+ if (dma_mapping_error(device->card->device, orb->base.request_bus)) {
+ sbp2_unmap_scatterlist(device->card->device, orb);
goto out;
+ }
- sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation,
+ sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation,
lu->command_block_agent_address + SBP2_ORB_POINTER);
retval = 0;
out:
if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
+ blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE);
+
return 0;
}
* 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)
+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;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff