#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
+#include <linux/mm.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
#include <linux/stringify.h>
#include <linux/types.h>
#include <linux/wait.h>
+#include <linux/workqueue.h>
#include <asm/byteorder.h>
#include <asm/errno.h>
"(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)");
/*
- * Set serialize_io to 1 if you'd like only one scsi command sent
- * down to us at a time (debugging). This might be necessary for very
- * badly behaved sbp2 devices.
+ * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs.
+ * This is and always has been buggy in multiple subtle ways. See above TODOs.
*/
static int sbp2_serialize_io = 1;
-module_param_named(serialize_io, sbp2_serialize_io, int, 0444);
-MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers "
- "(default = 1, faster = 0)");
+module_param_named(serialize_io, sbp2_serialize_io, bool, 0444);
+MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers "
+ "(default = Y, faster but buggy = N)");
/*
* Bump up max_sectors if you'd like to support very large sized
* are possible on OXFW911 and newer Oxsemi bridges.
*/
static int sbp2_exclusive_login = 1;
-module_param_named(exclusive_login, sbp2_exclusive_login, int, 0644);
+module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644);
MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
- "(default = 1)");
+ "(default = Y, use N for concurrent initiators)");
/*
* If any of the following workarounds is required for your device to work,
", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
", or a combination)");
+/*
+ * This influences the format of the sysfs attribute
+ * /sys/bus/scsi/devices/.../ieee1394_id.
+ *
+ * The default format is like in older kernels: %016Lx:%d:%d
+ * It contains the target's EUI-64, a number given to the logical unit by
+ * the ieee1394 driver's nodemgr (starting at 0), and the LUN.
+ *
+ * The long format is: %016Lx:%06x:%04x
+ * It contains the target's EUI-64, the unit directory's directory_ID as per
+ * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the
+ * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI
+ * Architecture Model) rev.2 to 4 annex A. Therefore and because it is
+ * independent of the implementation of the ieee1394 nodemgr, the longer format
+ * is recommended for future use.
+ */
+static int sbp2_long_sysfs_ieee1394_id;
+module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644);
+MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs "
+ "(default = backwards-compatible = N, SAM-conforming = Y)");
+
#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
{
struct sbp2_fwhost_info *hi = lu->hi;
- int i;
- unsigned long flags, orbs;
struct sbp2_command_info *cmd;
+ int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
- orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
-
- spin_lock_irqsave(&lu->cmd_orb_lock, flags);
for (i = 0; i < orbs; i++) {
- cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
- if (!cmd) {
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
+ cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd)
return -ENOMEM;
- }
cmd->command_orb_dma = dma_map_single(hi->host->device.parent,
&cmd->command_orb,
sizeof(struct sbp2_command_orb),
cmd->sge_dma = dma_map_single(hi->host->device.parent,
&cmd->scatter_gather_element,
sizeof(cmd->scatter_gather_element),
- DMA_BIDIRECTIONAL);
+ DMA_TO_DEVICE);
INIT_LIST_HEAD(&cmd->list);
list_add_tail(&cmd->list, &lu->cmd_orb_completed);
}
- spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
return 0;
}
DMA_TO_DEVICE);
dma_unmap_single(host->device.parent, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
- DMA_BIDIRECTIONAL);
+ DMA_TO_DEVICE);
kfree(cmd);
}
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
SBP2_ERR("failed to register lower 4GB address range");
goto failed_alloc;
}
+#else
+ if (dma_set_mask(hi->host->device.parent, DMA_32BIT_MASK)) {
+ SBP2_ERR("failed to set 4GB DMA mask");
+ goto failed_alloc;
+ }
#endif
}
if (!lu->login_orb)
goto alloc_fail;
- if (sbp2util_create_command_orb_pool(lu)) {
- SBP2_ERR("sbp2util_create_command_orb_pool failed!");
- sbp2_remove_device(lu);
- return -ENOMEM;
- }
+ if (sbp2util_create_command_orb_pool(lu))
+ goto alloc_fail;
/* Wait a second before trying to log in. Previously logged in
* initiators need a chance to reconnect. */
}
}
-static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
- struct sbp2_fwhost_info *hi,
- struct sbp2_command_info *cmd,
- struct scatterlist *sgpnt,
- u32 orb_direction,
- unsigned int scsi_request_bufflen,
- void *scsi_request_buffer,
- enum dma_data_direction dma_dir)
-{
- cmd->dma_dir = dma_dir;
- cmd->dma_size = scsi_request_bufflen;
- cmd->dma_type = CMD_DMA_SINGLE;
- cmd->cmd_dma = dma_map_single(hi->host->device.parent,
- scsi_request_buffer,
- cmd->dma_size, cmd->dma_dir);
- orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
- orb->misc |= ORB_SET_DIRECTION(orb_direction);
-
- /* handle case where we get a command w/o s/g enabled
- * (but check for transfers larger than 64K) */
- if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
-
- orb->data_descriptor_lo = cmd->cmd_dma;
- orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
-
- } else {
- /* The buffer is too large. Turn this into page tables. */
-
- struct sbp2_unrestricted_page_table *sg_element =
- &cmd->scatter_gather_element[0];
- u32 sg_count, sg_len;
- dma_addr_t sg_addr;
-
- orb->data_descriptor_lo = cmd->sge_dma;
- orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
-
- /* fill out our SBP-2 page tables; split up the large buffer */
- sg_count = 0;
- sg_len = scsi_request_bufflen;
- sg_addr = cmd->cmd_dma;
- while (sg_len) {
- sg_element[sg_count].segment_base_lo = sg_addr;
- if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
- sg_element[sg_count].length_segment_base_hi =
- PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
- sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
- sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
- } else {
- sg_element[sg_count].length_segment_base_hi =
- PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
- sg_len = 0;
- }
- sg_count++;
- }
-
- orb->misc |= ORB_SET_DATA_SIZE(sg_count);
-
- sbp2util_cpu_to_be32_buffer(sg_element,
- (sizeof(struct sbp2_unrestricted_page_table)) *
- sg_count);
- }
-}
-
static void sbp2_create_command_orb(struct sbp2_lu *lu,
struct sbp2_command_info *cmd,
unchar *scsi_cmd,
orb->data_descriptor_hi = 0x0;
orb->data_descriptor_lo = 0x0;
orb->misc |= ORB_SET_DIRECTION(1);
- } else if (scsi_use_sg)
+ } else
sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
orb_direction, dma_dir);
- else
- sbp2_prep_command_orb_no_sg(orb, hi, cmd, sgpnt, orb_direction,
- scsi_request_bufflen,
- scsi_request_buffer, dma_dir);
sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
DMA_TO_DEVICE);
dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
- DMA_BIDIRECTIONAL);
+ DMA_TO_DEVICE);
/* check to see if there are any previous orbs to use */
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
void (*done)(struct scsi_cmnd *))
{
unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
- unsigned int request_bufflen = SCpnt->request_bufflen;
+ unsigned int request_bufflen = scsi_bufflen(SCpnt);
struct sbp2_command_info *cmd;
cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
if (!cmd)
return -EIO;
- sbp2_create_command_orb(lu, cmd, scsi_cmd, SCpnt->use_sg,
- request_bufflen, SCpnt->request_buffer,
+ sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt),
+ request_bufflen, scsi_sglist(SCpnt),
SCpnt->sc_data_direction);
sbp2_link_orb_command(lu, cmd);
DMA_TO_DEVICE);
dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
- DMA_BIDIRECTIONAL);
+ DMA_TO_DEVICE);
/* Grab SCSI command pointers and check status. */
/*
* FIXME: If the src field in the status is 1, the ORB DMA must
DMA_TO_DEVICE);
dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
- DMA_BIDIRECTIONAL);
+ DMA_TO_DEVICE);
sbp2util_mark_command_completed(lu, cmd);
if (cmd->Current_SCpnt) {
cmd->Current_SCpnt->result = status << 16;
dma_sync_single_for_cpu(hi->host->device.parent,
cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
- DMA_BIDIRECTIONAL);
+ DMA_TO_DEVICE);
sbp2util_mark_command_completed(lu, cmd);
if (cmd->Current_SCpnt) {
cmd->Current_SCpnt->result = DID_ABORT << 16;
if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
return 0;
- return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)lu->ne->guid,
- lu->ud->id, ORB_SET_LUN(lu->lun));
+ if (sbp2_long_sysfs_ieee1394_id)
+ return sprintf(buf, "%016Lx:%06x:%04x\n",
+ (unsigned long long)lu->ne->guid,
+ lu->ud->directory_id, ORB_SET_LUN(lu->lun));
+ else
+ return sprintf(buf, "%016Lx:%d:%d\n",
+ (unsigned long long)lu->ne->guid,
+ lu->ud->id, ORB_SET_LUN(lu->lun));
}
MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");