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scsi: Add 'hba_private' to SCSIRequest

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'tag' is just an abstraction to identify the command
from the driver. So we should make that explicit by
replacing 'tag' with a driver-defined pointer 'hba_private'.
This saves the lookup for driver handling several commands
in parallel.
'tag' is still being kept for tracing purposes.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Hannes Reinecke 2011-07-11 15:02:24 +02:00 • committed by Kevin Wolf
parent 348e7b8dcd
commit c5bf71a9a3
8 changed files with 37 additions and 52 deletions
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22
hw/lsi53c895a.c
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@ -661,7 +661,7 @@ static lsi_request *lsi_find_by_tag(LSIState *s, uint32_t tag)
static void lsi_request_cancelled(SCSIRequest *req)
{
LSIState *s = DO_UPCAST(LSIState, dev.qdev, req->bus->qbus.parent);
lsi_request *p;
lsi_request *p = req->hba_private;
if (s->current && req == s->current->req) {
scsi_req_unref(req);
@ -670,7 +670,6 @@ static void lsi_request_cancelled(SCSIRequest *req)
return;
}
p = lsi_find_by_tag(s, req->tag);
if (p) {
QTAILQ_REMOVE(&s->queue, p, next);
scsi_req_unref(req);
@ -680,18 +679,12 @@ static void lsi_request_cancelled(SCSIRequest *req)
/* Record that data is available for a queued command. Returns zero if
the device was reselected, nonzero if the IO is deferred. */
static int lsi_queue_tag(LSIState *s, uint32_t tag, uint32_t len)
static int lsi_queue_req(LSIState *s, SCSIRequest *req, uint32_t len)
{
lsi_request *p;
p = lsi_find_by_tag(s, tag);
if (!p) {
BADF("IO with unknown tag %d\n", tag);
return 1;
}
lsi_request *p = req->hba_private;
if (p->pending) {
BADF("Multiple IO pending for tag %d\n", tag);
BADF("Multiple IO pending for request %p\n", p);
}
p->pending = len;
/* Reselect if waiting for it, or if reselection triggers an IRQ
@ -743,9 +736,9 @@ static void lsi_transfer_data(SCSIRequest *req, uint32_t len)
LSIState *s = DO_UPCAST(LSIState, dev.qdev, req->bus->qbus.parent);
int out;
if (s->waiting == 1 || !s->current || req->tag != s->current->tag ||
if (s->waiting == 1 || !s->current || req->hba_private != s->current ||
(lsi_irq_on_rsl(s) && !(s->scntl1 & LSI_SCNTL1_CON))) {
if (lsi_queue_tag(s, req->tag, len)) {
if (lsi_queue_req(s, req, len)) {
return;
}
}
@ -789,7 +782,8 @@ static void lsi_do_command(LSIState *s)
assert(s->current == NULL);
s->current = qemu_mallocz(sizeof(lsi_request));
s->current->tag = s->select_tag;
s->current->req = scsi_req_new(dev, s->current->tag, s->current_lun);
s->current->req = scsi_req_new(dev, s->current->tag, s->current_lun,
s->current);
n = scsi_req_enqueue(s->current->req, buf);
if (n) {