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vscsi: always use get_sense

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vscsi supports autosensing by providing sense data directly in the
response.  When get_sense was added, the older state machine approach
that sent REQUEST SENSE commands separately was left in place.  Remove
it, all existing SCSIDevices do support autosensing and the next patches
will make the support come for free from the SCSIBus.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Paolo Bonzini 2011-08-03 10:49:05 +02:00 committed by Anthony Liguori
parent e44089c79d
commit 05751d3ff7
1 changed files with 21 additions and 70 deletions
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73
hw/spapr_vscsi.c
View File

@ -80,7 +80,6 @@ typedef struct vscsi_req {
int active;
long data_len;
int writing;
int sensing;
int senselen;
uint8_t sense[SCSI_SENSE_BUF_SIZE];
@ -436,40 +435,6 @@ static int vscsi_preprocess_desc(vscsi_req *req)
return 0;
}
static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req)
{
uint8_t *cdb = req->iu.srp.cmd.cdb;
int n;
n = scsi_req_get_sense(req->sreq, req->sense, sizeof(req->sense));
if (n) {
req->senselen = n;
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
vscsi_put_req(req);
return;
}
dprintf("VSCSI: Got CHECK_CONDITION, requesting sense...\n");
cdb[0] = 3;
cdb[1] = 0;
cdb[2] = 0;
cdb[3] = 0;
cdb[4] = 96;
cdb[5] = 0;
req->sensing = 1;
n = scsi_req_enqueue(req->sreq, cdb);
dprintf("VSCSI: Queued request sense tag 0x%x\n", req->qtag);
if (n < 0) {
fprintf(stderr, "VSCSI: REQUEST_SENSE wants write data !?!?!?\n");
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0);
scsi_req_abort(req->sreq, CHECK_CONDITION);
return;
} else if (n == 0) {
return;
}
scsi_req_continue(req->sreq);
}
/* Callback to indicate that the SCSI layer has completed a transfer. */
static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len)
{
@ -485,23 +450,6 @@ static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len)
return;
}
if (req->sensing) {
uint8_t *buf = scsi_req_get_buf(sreq);
len = MIN(len, SCSI_SENSE_BUF_SIZE);
dprintf("VSCSI: Sense data, %d bytes:\n", len);
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5], buf[6], buf[7]);
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
buf[8], buf[9], buf[10], buf[11],
buf[12], buf[13], buf[14], buf[15]);
memcpy(req->sense, buf, len);
req->senselen = len;
scsi_req_continue(req->sreq);
return;
}
if (len) {
buf = scsi_req_get_buf(sreq);
rc = vscsi_srp_transfer_data(s, req, req->writing, buf, len);
@ -532,15 +480,19 @@ static void vscsi_command_complete(SCSIRequest *sreq, uint32_t status)
return;
}
if (!req->sensing && status == CHECK_CONDITION) {
vscsi_send_request_sense(s, req);
return;
if (status == CHECK_CONDITION) {
req->senselen = scsi_req_get_sense(req->sreq, req->sense,
sizeof(req->sense));
status = 0;
dprintf("VSCSI: Sense data, %d bytes:\n", len);
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
req->sense[0], req->sense[1], req->sense[2], req->sense[3],
req->sense[4], req->sense[5], req->sense[6], req->sense[7]);
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
req->sense[8], req->sense[9], req->sense[10], req->sense[11],
req->sense[12], req->sense[13], req->sense[14], req->sense[15]);
}
if (req->sensing) {
dprintf("VSCSI: Sense done !\n");
status = CHECK_CONDITION;
} else {
dprintf("VSCSI: Command complete err=%d\n", status);
if (status == 0) {
/* We handle overflows, not underflows for normal commands,
@ -552,8 +504,7 @@ static void vscsi_command_complete(SCSIRequest *sreq, uint32_t status)
res_in = req->data_len;
}
}
}
vscsi_send_rsp(s, req, 0, res_in, res_out);
vscsi_send_rsp(s, req, status, res_in, res_out);
vscsi_put_req(req);
}