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scsi: introduce scsi_req_data 

This abstracts calling the command_complete callback, reducing churn
in the following patches.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Paolo Bonzini 2011-04-18 14:59:13 +02:00
parent 40f16dd127
commit ab9adc88c8
5 changed files with 20 additions and 7 deletions
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11
hw/scsi-bus.c
View File

@ -495,6 +495,17 @@ static const char *scsi_command_name(uint8_t cmd)
return names[cmd];
}
/* Called by the devices when data is ready for the HBA. The HBA should
start a DMA operation to read or fill the device's data buffer.
Once it completes, calling one of req->dev->info->read_data or
req->dev->info->write_data (depending on the direction of the
transfer) will restart I/O. */
void scsi_req_data(SCSIRequest *req, int len)
{
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
req->bus->complete(req->bus, SCSI_REASON_DATA, req->tag, len);
}
void scsi_req_print(SCSIRequest *req)
{
FILE *fp = stderr;

8
hw/scsi-disk.c
View File

@ -170,7 +170,7 @@ static void scsi_read_complete(void * opaque, int ret)
n = r->iov.iov_len / 512;
r->sector += n;
r->sector_count -= n;
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
scsi_req_data(&r->req, r->iov.iov_len);
}
@ -182,7 +182,7 @@ static void scsi_read_request(SCSIDiskReq *r)
if (r->sector_count == (uint32_t)-1) {
DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
r->sector_count = 0;
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
scsi_req_data(&r->req, r->iov.iov_len);
return;
}
DPRINTF("Read sector_count=%d\n", r->sector_count);
@ -245,7 +245,7 @@ static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type)
vm_stop(VMSTOP_DISKFULL);
} else {
if (type == SCSI_REQ_STATUS_RETRY_READ) {
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
scsi_req_data(&r->req, 0);
}
scsi_command_complete(r, CHECK_CONDITION,
HARDWARE_ERROR);
@ -281,7 +281,7 @@ static void scsi_write_complete(void * opaque, int ret)
}
r->iov.iov_len = len;
DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len);
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len);
scsi_req_data(&r->req, len);
}
}

6
hw/scsi-generic.c
View File

@ -175,7 +175,7 @@ static void scsi_read_complete(void * opaque, int ret)
if (len == 0) {
scsi_command_complete(r, 0);
} else {
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len);
scsi_req_data(&r->req, len);
}
}
@ -212,7 +212,7 @@ static void scsi_read_data(SCSIDevice *d, uint32_t tag)
DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
r->buf[0], r->buf[1], r->buf[2], r->buf[3],
r->buf[4], r->buf[5], r->buf[6], r->buf[7]);
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, s->senselen);
scsi_req_data(&r->req, s->senselen);
return;
}
@ -263,7 +263,7 @@ static int scsi_write_data(SCSIDevice *d, uint32_t tag)
if (r->len == 0) {
r->len = r->buflen;
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->len);
scsi_req_data(&r->req, r->len);
return 0;
}

1
hw/scsi.h
View File

@ -105,6 +105,7 @@ void scsi_req_free(SCSIRequest *req);
int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
void scsi_req_print(SCSIRequest *req);
void scsi_req_data(SCSIRequest *req, int len);
void scsi_req_complete(SCSIRequest *req);
#endif

1
trace-events
View File

@ -207,6 +207,7 @@ disable usb_set_device_feature(int addr, int feature, int ret) "dev %d, feature
# hw/scsi-bus.c
disable scsi_req_alloc(int target, int lun, int tag) "target %d lun %d tag %d"
disable scsi_req_data(int target, int lun, int tag, int len) "target %d lun %d tag %d len %d"
disable scsi_req_dequeue(int target, int lun, int tag) "target %d lun %d tag %d"
disable scsi_req_parsed(int target, int lun, int tag, int cmd, int mode, int xfer, uint64_t lba) "target %d lun %d tag %d command %d dir %d length %d lba %"PRIu64""
disable scsi_req_parse_bad(int target, int lun, int tag, int cmd) "target %d lun %d tag %d command %d"