#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/string.h>
+#include <linux/stringify.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
*/
static int max_sectors = SBP2_MAX_SECTORS;
module_param(max_sectors, int, 0444);
-MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)");
+MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = "
+ __stringify(SBP2_MAX_SECTORS) ")");
/*
* Exclusive login to sbp2 device? In most cases, the sbp2 driver should
* talking to a single sbp2 device at the same time (filesystem coherency,
* etc.). If you're running an sbp2 device that supports multiple logins,
* and you're either running read-only filesystems or some sort of special
- * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
- * see opengfs.sourceforge.net for more info), then set exclusive_login
- * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
- * concurrent logins.
+ * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
+ * File System, or Lustre, then set exclusive_login to zero.
+ *
+ * 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.
*/
static int exclusive_login = 1;
module_param(exclusive_login, int, 0644);
MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
/*
- * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
- * if your sbp2 device is not properly handling the SCSI inquiry command.
- * This hack makes the inquiry look more like a typical MS Windows inquiry
- * by enforcing 36 byte inquiry and avoiding access to mode_sense page 8.
+ * If any of the following workarounds is required for your device to work,
+ * please submit the kernel messages logged by sbp2 to the linux1394-devel
+ * mailing list.
+ *
+ * - 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.
*
- * If force_inquiry_hack=1 is required for your device to work,
- * please submit the logged sbp2_firmware_revision value of this device to
- * the linux1394-devel mailing list.
+ * - 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.
*/
+static int sbp2_default_workarounds;
+module_param_named(workarounds, sbp2_default_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)");
+
+/* legacy parameter */
static int force_inquiry_hack;
module_param(force_inquiry_hack, int, 0644);
-MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
+MODULE_PARM_DESC(force_inquiry_hack, "Deprecated, use 'workarounds'");
/*
* Export information about protocols/devices supported by this driver.
};
/*
- * List of device firmwares that require the inquiry hack.
- * Yields a few false positives but did not break other devices so far.
+ * 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.
*/
-static u32 sbp2_broken_inquiry_list[] = {
- 0x00002800, /* Stefan Richter <stefanr@s5r6.in-berlin.de> */
- /* DViCO Momobay CX-1 */
- 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
- /* QPS Fire DVDBurner */
+static const struct {
+ u32 firmware_revision;
+ u32 model_id;
+ unsigned workarounds;
+} sbp2_workarounds_table[] = {
+ /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
+ .firmware_revision = 0x002800,
+ .model_id = 0x001010,
+ .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
+ SBP2_WORKAROUND_MODE_SENSE_8,
+ },
+ /* Initio bridges, actually only needed for some older ones */ {
+ .firmware_revision = 0x000200,
+ .workarounds = SBP2_WORKAROUND_INQUIRY_36,
+ },
+ /* Symbios bridge */ {
+ .firmware_revision = 0xa0b800,
+ .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
+ },
+ /*
+ * Note about the following Apple iPod blacklist entries:
+ *
+ * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
+ * matching logic treats 0 as a wildcard, we cannot match this ID
+ * without rewriting the matching routine. Fortunately 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 4th generation */ {
+ .firmware_revision = 0x0a2700,
+ .model_id = 0x000021,
+ .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
+ },
+ /* iPod mini */ {
+ .firmware_revision = 0x0a2700,
+ .model_id = 0x000023,
+ .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
+ },
+ /* iPod Photo */ {
+ .firmware_revision = 0x0a2700,
+ .model_id = 0x00007e,
+ .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
+ }
};
/**************************************
scsi_id->ud = ud;
scsi_id->speed_code = IEEE1394_SPEED_100;
scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
+ scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
atomic_set(&scsi_id->sbp2_login_complete, 0);
INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
INIT_LIST_HEAD(&scsi_id->scsi_list);
spin_lock_init(&scsi_id->sbp2_command_orb_lock);
- scsi_id->sbp2_lun = 0;
ud->device.driver_data = scsi_id;
/* Register the status FIFO address range. We could use the same FIFO
* for targets at different nodes. However we need different FIFOs per
- * target in order to support multi-unit devices. */
+ * target in order to support multi-unit devices.
+ * The FIFO is located out of the local host controller's physical range
+ * but, if possible, within the posted write area. Status writes will
+ * then be performed as unified transactions. This slightly reduces
+ * bandwidth usage, and some Prolific based devices seem to require it.
+ */
scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
&sbp2_highlevel, ud->ne->host, &sbp2_ops,
sizeof(struct sbp2_status_block), sizeof(quadlet_t),
- ~0ULL, ~0ULL);
- if (!scsi_id->status_fifo_addr) {
+ ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
+ if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
SBP2_ERR("failed to allocate status FIFO address range");
goto failed_alloc;
}
SBP2_DMA_FREE("single query logins data");
}
- if (scsi_id->status_fifo_addr)
+ if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
- scsi_id->status_fifo_addr);
+ scsi_id->status_fifo_addr);
scsi_id->ud->device.driver_data = NULL;
SBP2_DEBUG("length_max_logins = %x",
(unsigned int)scsi_id->query_logins_response->length_max_logins);
- SBP2_DEBUG("Query logins to SBP-2 device successful");
-
max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
- SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
+ SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
- SBP2_DEBUG("Number of active logins: %d", active_logins);
+ SBP2_INFO("Number of active logins: %d", active_logins);
if (active_logins >= max_logins) {
return -EIO;
struct csr1212_dentry *dentry;
u64 management_agent_addr;
u32 command_set_spec_id, command_set, unit_characteristics,
- firmware_revision, workarounds;
+ firmware_revision;
+ unsigned workarounds;
int i;
SBP2_DEBUG_ENTER();
case SBP2_FIRMWARE_REVISION_KEY:
/* Firmware revision */
firmware_revision = kv->value.immediate;
- if (force_inquiry_hack)
- SBP2_INFO("sbp2_firmware_revision = %x",
- (unsigned int)firmware_revision);
- else
- SBP2_DEBUG("sbp2_firmware_revision = %x",
- (unsigned int)firmware_revision);
+ SBP2_DEBUG("sbp2_firmware_revision = %x",
+ (unsigned int)firmware_revision);
break;
default:
}
}
- /* This is the start of our broken device checking. We try to hack
- * around oddities and known defects. */
- workarounds = 0x0;
+ workarounds = sbp2_default_workarounds;
+ if (force_inquiry_hack) {
+ SBP2_WARN("force_inquiry_hack is deprecated. "
+ "Use parameter 'workarounds' instead.");
+ workarounds |= SBP2_WORKAROUND_INQUIRY_36;
+ }
- /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
- * bridge with 128KB max transfer size limitation. For sanity, we
- * only voice this when the current max_sectors setting
- * exceeds the 128k limit. By default, that is not the case.
- *
- * It would be really nice if we could detect this before the scsi
- * host gets initialized. That way we can down-force the
- * max_sectors to account for it. That is not currently
- * possible. */
- if ((firmware_revision & 0xffff00) ==
- SBP2_128KB_BROKEN_FIRMWARE &&
- (max_sectors * 512) > (128*1024)) {
- SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
- NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
- SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
- max_sectors);
- workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
- }
-
- /* Check for a blacklisted set of devices that require us to force
- * a 36 byte host inquiry. This can be overriden as a module param
- * (to force all hosts). */
- for (i = 0; i < ARRAY_SIZE(sbp2_broken_inquiry_list); i++) {
- if ((firmware_revision & 0xffff00) ==
- sbp2_broken_inquiry_list[i]) {
- SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
- NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
- workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
- break; /* No need to continue. */
+ if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
+ for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
+ if (sbp2_workarounds_table[i].firmware_revision &&
+ sbp2_workarounds_table[i].firmware_revision !=
+ (firmware_revision & 0xffff00))
+ continue;
+ if (sbp2_workarounds_table[i].model_id &&
+ sbp2_workarounds_table[i].model_id != ud->model_id)
+ continue;
+ workarounds |= sbp2_workarounds_table[i].workarounds;
+ break;
}
- }
+
+ if (workarounds)
+ SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
+ "(firmware_revision 0x%06x, vendor_id 0x%06x,"
+ " model_id 0x%06x)",
+ NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
+ workarounds, firmware_revision,
+ ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
+ ud->model_id);
+
+ /* We would need one SCSI host template for each target to adjust
+ * max_sectors on the fly, therefore warn only. */
+ if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
+ (max_sectors * 512) > (128 * 1024))
+ SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
+ "max transfer size. WARNING: Current max_sectors "
+ "setting is larger than 128KB (%d sectors)",
+ NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
+ max_sectors);
/* If this is a logical unit directory entry, process the parent
* to get the values. */
}
}
+#define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
+
/*
* This function is called in order to determine the max speed and packet
* size we can use in our ORBs. Note, that we (the driver and host) only
static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
{
struct sbp2scsi_host_info *hi = scsi_id->hi;
+ u8 payload;
SBP2_DEBUG_ENTER();
- /* Initial setting comes from the hosts speed map */
scsi_id->speed_code =
- hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 +
- NODEID_TO_NODE(scsi_id->ne->nodeid)];
+ hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)];
/* Bump down our speed if the user requested it */
if (scsi_id->speed_code > max_speed) {
/* Payload size is the lesser of what our speed supports and what
* our host supports. */
- scsi_id->max_payload_size =
- min(sbp2_speedto_max_payload[scsi_id->speed_code],
- (u8) (hi->host->csr.max_rec - 1));
+ payload = min(sbp2_speedto_max_payload[scsi_id->speed_code],
+ (u8) (hi->host->csr.max_rec - 1));
+
+ /* If physical DMA is off, work around limitation in ohci1394:
+ * packet size must not exceed PAGE_SIZE */
+ if (scsi_id->ne->host->low_addr_space < (1ULL << 32))
+ while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
+ payload)
+ payload--;
HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
hpsb_speedto_str[scsi_id->speed_code],
- 1 << ((u32) scsi_id->max_payload_size + 2));
+ SBP2_PAYLOAD_TO_BYTES(payload));
+ scsi_id->max_payload_size = payload;
return 0;
}
return sbp2_status[8] & 0x3f; /* return scsi status */
}
-/*
- * This function is called after a command is completed, in order to do any necessary SBP-2
- * response data translations for the SCSI stack
- */
-static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
- struct scsi_cmnd *SCpnt)
-{
- u8 *scsi_buf = SCpnt->request_buffer;
-
- SBP2_DEBUG_ENTER();
-
- if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) {
- /*
- * Make sure data length is ok. Minimum length is 36 bytes
- */
- if (scsi_buf[4] == 0) {
- scsi_buf[4] = 36 - 5;
- }
-
- /*
- * Fix ansi revision and response data format
- */
- scsi_buf[2] |= 2;
- scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
- }
-}
-
/*
* This function deals with status writes from the SBP-2 device
*/
SCpnt->result = DID_ERROR << 16;
}
- /*
- * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
- */
- if (SCpnt->result == DID_OK << 16) {
- sbp2_check_sbp2_response(scsi_id, SCpnt);
- }
-
/*
* If a bus reset is in progress and there was an error, complete
* the command as busy so that it will get retried.
scsi_id->sdev = sdev;
- if (force_inquiry_hack ||
- scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) {
+ if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36)
sdev->inquiry_len = 36;
- sdev->skip_ms_page_8 = 1;
- }
return 0;
}
static int sbp2scsi_slave_configure(struct scsi_device *sdev)
{
+ struct scsi_id_instance_data *scsi_id =
+ (struct scsi_id_instance_data *)sdev->host->hostdata[0];
+
blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
sdev->use_10_for_rw = 1;
sdev->use_10_for_ms = 1;
+
+ if (sdev->type == TYPE_DISK &&
+ scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
+ sdev->skip_ms_page_8 = 1;
+ if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
+ sdev->fix_capacity = 1;
return 0;
}
scsi_driver_template.cmd_per_lun = 1;
}
- /* Set max sectors (module load option). Default is 255 sectors. */
+ if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
+ (max_sectors * 512) > (128 * 1024))
+ max_sectors = 128 * 1024 / 512;
scsi_driver_template.max_sectors = max_sectors;
/* Register our high level driver with 1394 stack */
projects / linux-2.6 / blobdiff