[SCSI] 53c700: remove reliance on deprecated cmnd fields
This one's quite tricky. The 53c700 uses the now deprecated fields of
the command structure for saving the prior command when it does
autosense. To fix this, we have to add extra fields to the LUN to
accommodate a copy of the real command.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c
index 4958c3b..3c683dc 100644
--- a/drivers/scsi/53c700.c
+++ b/drivers/scsi/53c700.c
@@ -183,6 +183,10 @@
STATIC struct scsi_transport_template *NCR_700_transport_template = NULL;
+struct NCR_700_sense {
+ unsigned char cmnd[MAX_COMMAND_SIZE];
+};
+
static char *NCR_700_phase[] = {
"",
"after selection",
@@ -537,6 +541,7 @@
* finish routine. If we cannot queue the command when it
* is properly build, we then change to NCR_700_SLOT_QUEUED */
slot->state = NCR_700_SLOT_BUSY;
+ slot->flags = 0;
hostdata->command_slot_count++;
return slot;
@@ -586,7 +591,7 @@
if(SCp->sc_data_direction != DMA_NONE &&
SCp->sc_data_direction != DMA_BIDIRECTIONAL) {
if(SCp->use_sg) {
- dma_unmap_sg(hostdata->dev, SCp->buffer,
+ dma_unmap_sg(hostdata->dev, SCp->request_buffer,
SCp->use_sg, SCp->sc_data_direction);
} else {
dma_unmap_single(hostdata->dev, slot->dma_handle,
@@ -608,30 +613,23 @@
(struct NCR_700_command_slot *)SCp->host_scribble;
NCR_700_unmap(hostdata, SCp, slot);
- dma_unmap_single(hostdata->dev, slot->pCmd,
- sizeof(SCp->cmnd), DMA_TO_DEVICE);
- if(SCp->cmnd[0] == REQUEST_SENSE && SCp->cmnd[6] == NCR_700_INTERNAL_SENSE_MAGIC) {
+ if (slot->flags == NCR_700_FLAG_AUTOSENSE) {
+ struct NCR_700_sense *sense = SCp->device->hostdata;
#ifdef NCR_700_DEBUG
printk(" ORIGINAL CMD %p RETURNED %d, new return is %d sense is\n",
SCp, SCp->cmnd[7], result);
scsi_print_sense("53c700", SCp);
#endif
+ dma_unmap_single(hostdata->dev, slot->dma_handle, sizeof(SCp->sense_buffer), DMA_FROM_DEVICE);
/* restore the old result if the request sense was
* successful */
if(result == 0)
- result = SCp->cmnd[7];
- /* now restore the original command */
- memcpy((void *) SCp->cmnd, (void *) SCp->data_cmnd,
- sizeof(SCp->data_cmnd));
- SCp->request_buffer = SCp->buffer;
- SCp->request_bufflen = SCp->bufflen;
- SCp->use_sg = SCp->old_use_sg;
- SCp->cmd_len = SCp->old_cmd_len;
- SCp->sc_data_direction = SCp->sc_old_data_direction;
- SCp->underflow = SCp->old_underflow;
-
- }
+ result = sense->cmnd[7];
+ } else
+ dma_unmap_single(hostdata->dev, slot->pCmd,
+ sizeof(SCp->cmnd), DMA_TO_DEVICE);
+
free_slot(slot, hostdata);
#ifdef NCR_700_DEBUG
if(NCR_700_get_depth(SCp->device) == 0 ||
@@ -979,6 +977,7 @@
"broken device is looping in contingent allegiance: ignoring\n");
NCR_700_scsi_done(hostdata, SCp, hostdata->status[0]);
} else {
+ struct NCR_700_sense *sense = SCp->device->hostdata;
#ifdef NCR_DEBUG
scsi_print_command(SCp);
printk(" cmd %p has status %d, requesting sense\n",
@@ -992,27 +991,25 @@
* data associated with the command
* here */
NCR_700_unmap(hostdata, SCp, slot);
+ dma_unmap_single(hostdata->dev, slot->pCmd,
+ sizeof(SCp->cmnd),
+ DMA_TO_DEVICE);
- SCp->cmnd[0] = REQUEST_SENSE;
- SCp->cmnd[1] = (SCp->device->lun & 0x7) << 5;
- SCp->cmnd[2] = 0;
- SCp->cmnd[3] = 0;
- SCp->cmnd[4] = sizeof(SCp->sense_buffer);
- SCp->cmnd[5] = 0;
- SCp->cmd_len = 6;
+ sense->cmnd[0] = REQUEST_SENSE;
+ sense->cmnd[1] = (SCp->device->lun & 0x7) << 5;
+ sense->cmnd[2] = 0;
+ sense->cmnd[3] = 0;
+ sense->cmnd[4] = sizeof(SCp->sense_buffer);
+ sense->cmnd[5] = 0;
/* Here's a quiet hack: the
* REQUEST_SENSE command is six bytes,
* so store a flag indicating that
* this was an internal sense request
* and the original status at the end
* of the command */
- SCp->cmnd[6] = NCR_700_INTERNAL_SENSE_MAGIC;
- SCp->cmnd[7] = hostdata->status[0];
- SCp->use_sg = 0;
- SCp->sc_data_direction = DMA_FROM_DEVICE;
- dma_sync_single_for_device(hostdata->dev, slot->pCmd,
- SCp->cmd_len, DMA_TO_DEVICE);
- SCp->request_bufflen = sizeof(SCp->sense_buffer);
+ sense->cmnd[6] = NCR_700_INTERNAL_SENSE_MAGIC;
+ sense->cmnd[7] = hostdata->status[0];
+ slot->pCmd = dma_map_single(hostdata->dev, sense->cmnd, sizeof(sense->cmnd), DMA_TO_DEVICE);
slot->dma_handle = dma_map_single(hostdata->dev, SCp->sense_buffer, sizeof(SCp->sense_buffer), DMA_FROM_DEVICE);
slot->SG[0].ins = bS_to_host(SCRIPT_MOVE_DATA_IN | sizeof(SCp->sense_buffer));
slot->SG[0].pAddr = bS_to_host(slot->dma_handle);
@@ -1024,6 +1021,7 @@
/* queue the command for reissue */
slot->state = NCR_700_SLOT_QUEUED;
+ slot->flags = NCR_700_FLAG_AUTOSENSE;
hostdata->state = NCR_700_HOST_FREE;
hostdata->cmd = NULL;
}
@@ -1244,7 +1242,7 @@
if(SCp->use_sg) {
for(i = 0; i < SCp->use_sg + 1; i++) {
- printk(KERN_INFO " SG[%d].length = %d, move_insn=%08x, addr %08x\n", i, ((struct scatterlist *)SCp->buffer)[i].length, ((struct NCR_700_command_slot *)SCp->host_scribble)->SG[i].ins, ((struct NCR_700_command_slot *)SCp->host_scribble)->SG[i].pAddr);
+ printk(KERN_INFO " SG[%d].length = %d, move_insn=%08x, addr %08x\n", i, ((struct scatterlist *)SCp->request_buffer)[i].length, ((struct NCR_700_command_slot *)SCp->host_scribble)->SG[i].ins, ((struct NCR_700_command_slot *)SCp->host_scribble)->SG[i].pAddr);
}
}
}
@@ -1403,12 +1401,14 @@
/* keep interrupts disabled until we have the command correctly
* set up so we cannot take a selection interrupt */
- hostdata->msgout[0] = NCR_700_identify(SCp->cmnd[0] != REQUEST_SENSE,
+ hostdata->msgout[0] = NCR_700_identify((SCp->cmnd[0] != REQUEST_SENSE &&
+ slot->flags != NCR_700_FLAG_AUTOSENSE),
SCp->device->lun);
/* for INQUIRY or REQUEST_SENSE commands, we cannot be sure
* if the negotiated transfer parameters still hold, so
* always renegotiate them */
- if(SCp->cmnd[0] == INQUIRY || SCp->cmnd[0] == REQUEST_SENSE) {
+ if(SCp->cmnd[0] == INQUIRY || SCp->cmnd[0] == REQUEST_SENSE ||
+ slot->flags == NCR_700_FLAG_AUTOSENSE) {
NCR_700_clear_flag(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC);
}
@@ -1417,7 +1417,8 @@
* will refuse all tags, so send the request sense as untagged
* */
if((hostdata->tag_negotiated & (1<<scmd_id(SCp)))
- && (slot->tag != SCSI_NO_TAG && SCp->cmnd[0] != REQUEST_SENSE)) {
+ && (slot->tag != SCSI_NO_TAG && SCp->cmnd[0] != REQUEST_SENSE &&
+ slot->flags != NCR_700_FLAG_AUTOSENSE)) {
count += scsi_populate_tag_msg(SCp, &hostdata->msgout[count]);
}
@@ -1863,8 +1864,9 @@
__u32 count = 0;
if(SCp->use_sg) {
- sg_count = dma_map_sg(hostdata->dev, SCp->buffer,
- SCp->use_sg, direction);
+ sg_count = dma_map_sg(hostdata->dev,
+ SCp->request_buffer, SCp->use_sg,
+ direction);
} else {
vPtr = dma_map_single(hostdata->dev,
SCp->request_buffer,
@@ -1879,7 +1881,7 @@
for(i = 0; i < sg_count; i++) {
if(SCp->use_sg) {
- struct scatterlist *sg = SCp->buffer;
+ struct scatterlist *sg = SCp->request_buffer;
vPtr = sg_dma_address(&sg[i]);
count = sg_dma_len(&sg[i]);
@@ -2042,6 +2044,11 @@
struct NCR_700_Host_Parameters *hostdata =
(struct NCR_700_Host_Parameters *)SDp->host->hostdata[0];
+ SDp->hostdata = kmalloc(GFP_KERNEL, sizeof(struct NCR_700_sense));
+
+ if (!SDp->hostdata)
+ return -ENOMEM;
+
/* to do here: allocate memory; build a queue_full list */
if(SDp->tagged_supported) {
scsi_set_tag_type(SDp, MSG_ORDERED_TAG);
@@ -2065,7 +2072,8 @@
STATIC void
NCR_700_slave_destroy(struct scsi_device *SDp)
{
- /* to do here: deallocate memory */
+ kfree(SDp->hostdata);
+ SDp->hostdata = NULL;
}
static int