Revision ad2d30f7 hw/scsi-bus.c
| b/hw/scsi-bus.c | ||
|---|---|---|
| 136 | 136 |
SCSIRequest *req; |
| 137 | 137 |
|
| 138 | 138 |
req = qemu_mallocz(size); |
| 139 |
/* Two references: one is passed back to the HBA, one is in d->requests. */ |
|
| 140 |
req->refcount = 2; |
|
| 139 | 141 |
req->bus = scsi_bus_from_device(d); |
| 140 | 142 |
req->dev = d; |
| 141 | 143 |
req->tag = tag; |
| ... | ... | |
| 159 | 161 |
return NULL; |
| 160 | 162 |
} |
| 161 | 163 |
|
| 162 |
static void scsi_req_dequeue(SCSIRequest *req)
|
|
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void scsi_req_dequeue(SCSIRequest *req) |
|
| 163 | 165 |
{
|
| 164 | 166 |
trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag); |
| 165 | 167 |
if (req->enqueued) {
|
| 166 | 168 |
QTAILQ_REMOVE(&req->dev->requests, req, next); |
| 167 | 169 |
req->enqueued = false; |
| 170 |
scsi_req_unref(req); |
|
| 168 | 171 |
} |
| 169 | 172 |
} |
| 170 | 173 |
|
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void scsi_req_free(SCSIRequest *req) |
|
| 172 |
{
|
|
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scsi_req_dequeue(req); |
|
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qemu_free(req); |
|
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} |
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|
|
| 177 | 174 |
static int scsi_req_length(SCSIRequest *req, uint8_t *cmd) |
| 178 | 175 |
{
|
| 179 | 176 |
switch (cmd[0] >> 5) {
|
| ... | ... | |
| 495 | 492 |
return names[cmd]; |
| 496 | 493 |
} |
| 497 | 494 |
|
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SCSIRequest *scsi_req_ref(SCSIRequest *req) |
|
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{
|
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req->refcount++; |
|
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return req; |
|
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} |
|
| 500 |
|
|
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void scsi_req_unref(SCSIRequest *req) |
|
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{
|
|
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if (--req->refcount == 0) {
|
|
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if (req->dev->info->free_req) {
|
|
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req->dev->info->free_req(req); |
|
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} |
|
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qemu_free(req); |
|
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} |
|
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} |
|
| 510 |
|
|
| 498 | 511 |
/* Called by the devices when data is ready for the HBA. The HBA should |
| 499 | 512 |
start a DMA operation to read or fill the device's data buffer. |
| 500 | 513 |
Once it completes, calling one of req->dev->info->read_data or |
| ... | ... | |
| 537 | 550 |
void scsi_req_complete(SCSIRequest *req) |
| 538 | 551 |
{
|
| 539 | 552 |
assert(req->status != -1); |
| 553 |
scsi_req_ref(req); |
|
| 540 | 554 |
scsi_req_dequeue(req); |
| 541 | 555 |
req->bus->ops->complete(req->bus, SCSI_REASON_DONE, |
| 542 | 556 |
req->tag, |
| 543 | 557 |
req->status); |
| 558 |
scsi_req_unref(req); |
|
| 544 | 559 |
} |
| 545 | 560 |
|
| 546 | 561 |
static char *scsibus_get_fw_dev_path(DeviceState *dev) |
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