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scsi: split command_complete callback in two 

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Paolo Bonzini 2011-04-22 12:27:30 +02:00
parent 3944966d95
commit c6df7102f5
6 changed files with 168 additions and 137 deletions
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62
hw/esp.c
View File

@ -395,38 +395,43 @@ static void esp_do_dma(ESPState *s)
esp_dma_done(s);
}
static void esp_command_complete(SCSIRequest *req, int reason, uint32_t arg)
static void esp_command_complete(SCSIRequest *req, uint32_t arg)
{
ESPState *s = DO_UPCAST(ESPState, busdev.qdev, req->bus->qbus.parent);
if (reason == SCSI_REASON_DONE) {
DPRINTF("SCSI Command complete\n");
if (s->ti_size != 0)
DPRINTF("SCSI command completed unexpectedly\n");
s->ti_size = 0;
s->dma_left = 0;
s->async_len = 0;
if (arg)
DPRINTF("Command failed\n");
s->status = arg;
s->rregs[ESP_RSTAT] = STAT_ST;
DPRINTF("SCSI Command complete\n");
if (s->ti_size != 0) {
DPRINTF("SCSI command completed unexpectedly\n");
}
s->ti_size = 0;
s->dma_left = 0;
s->async_len = 0;
if (arg) {
DPRINTF("Command failed\n");
}
s->status = arg;
s->rregs[ESP_RSTAT] = STAT_ST;
esp_dma_done(s);
if (s->current_req) {
scsi_req_unref(s->current_req);
s->current_req = NULL;
s->current_dev = NULL;
}
}
static void esp_transfer_data(SCSIRequest *req, uint32_t arg)
{
ESPState *s = DO_UPCAST(ESPState, busdev.qdev, req->bus->qbus.parent);
DPRINTF("transfer %d/%d\n", s->dma_left, s->ti_size);
s->async_len = arg;
s->async_buf = scsi_req_get_buf(req);
if (s->dma_left) {
esp_do_dma(s);
} else if (s->dma_counter != 0 && s->ti_size <= 0) {
/* If this was the last part of a DMA transfer then the
completion interrupt is deferred to here. */
esp_dma_done(s);
if (s->current_req) {
scsi_req_unref(s->current_req);
s->current_req = NULL;
s->current_dev = NULL;
}
} else {
DPRINTF("transfer %d/%d\n", s->dma_left, s->ti_size);
s->async_len = arg;
s->async_buf = scsi_req_get_buf(req);
if (s->dma_left) {
esp_do_dma(s);
} else if (s->dma_counter != 0 && s->ti_size <= 0) {
/* If this was the last part of a DMA transfer then the
completion interrupt is deferred to here. */
esp_dma_done(s);
}
}
}
@ -725,6 +730,7 @@ void esp_init(target_phys_addr_t espaddr, int it_shift,
}
static const struct SCSIBusOps esp_scsi_ops = {
.transfer_data = esp_transfer_data,
.complete = esp_command_complete,
.cancel = esp_request_cancelled
};

60
hw/lsi53c895a.c
View File

@ -711,33 +711,38 @@ static int lsi_queue_tag(LSIState *s, uint32_t tag, uint32_t arg)
return 1;
}
}
/* Callback to indicate that the SCSI layer has completed a transfer. */
static void lsi_command_complete(SCSIRequest *req, int reason, uint32_t arg)
/* Callback to indicate that the SCSI layer has completed a command. */
static void lsi_command_complete(SCSIRequest *req, uint32_t arg)
{
LSIState *s = DO_UPCAST(LSIState, dev.qdev, req->bus->qbus.parent);
int out;
out = (s->sstat1 & PHASE_MASK) == PHASE_DO;
if (reason == SCSI_REASON_DONE) {
DPRINTF("Command complete status=%d\n", (int)arg);
s->status = arg;
s->command_complete = 2;
if (s->waiting && s->dbc != 0) {
/* Raise phase mismatch for short transfers. */
lsi_bad_phase(s, out, PHASE_ST);
} else {
lsi_set_phase(s, PHASE_ST);
}
if (s->current && req == s->current->req) {
scsi_req_unref(s->current->req);
qemu_free(s->current);
s->current = NULL;
}
lsi_resume_script(s);
return;
DPRINTF("Command complete status=%d\n", (int)arg);
s->status = arg;
s->command_complete = 2;
if (s->waiting && s->dbc != 0) {
/* Raise phase mismatch for short transfers. */
lsi_bad_phase(s, out, PHASE_ST);
} else {
lsi_set_phase(s, PHASE_ST);
}
if (s->current && req == s->current->req) {
scsi_req_unref(s->current->req);
qemu_free(s->current);
s->current = NULL;
}
lsi_resume_script(s);
}
/* Callback to indicate that the SCSI layer has completed a transfer. */
static void lsi_transfer_data(SCSIRequest *req, uint32_t arg)
{
LSIState *s = DO_UPCAST(LSIState, dev.qdev, req->bus->qbus.parent);
int out;
if (s->waiting == 1 || !s->current || req->tag != s->current->tag ||
(lsi_irq_on_rsl(s) && !(s->scntl1 & LSI_SCNTL1_CON))) {
if (lsi_queue_tag(s, req->tag, arg)) {
@ -745,16 +750,18 @@ static void lsi_command_complete(SCSIRequest *req, int reason, uint32_t arg)
}
}
out = (s->sstat1 & PHASE_MASK) == PHASE_DO;
/* host adapter (re)connected */
DPRINTF("Data ready tag=0x%x len=%d\n", req->tag, arg);
s->current->dma_len = arg;
s->command_complete = 1;
if (!s->waiting)
return;
if (s->waiting == 1 || s->dbc == 0) {
lsi_resume_script(s);
} else {
lsi_do_dma(s, out);
if (s->waiting) {
if (s->waiting == 1 || s->dbc == 0) {
lsi_resume_script(s);
} else {
lsi_do_dma(s, out);
}
}
}
@ -2239,6 +2246,7 @@ static int lsi_scsi_uninit(PCIDevice *d)
}
static const struct SCSIBusOps lsi_scsi_ops = {
.transfer_data = lsi_transfer_data,
.complete = lsi_command_complete,
.cancel = lsi_request_cancelled
};

4
hw/scsi-bus.c
View File

@ -634,7 +634,7 @@ void scsi_req_continue(SCSIRequest *req)
void scsi_req_data(SCSIRequest *req, int len)
{
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
req->bus->ops->complete(req, SCSI_REASON_DATA, len);
req->bus->ops->transfer_data(req, len);
}
void scsi_req_print(SCSIRequest *req)
@ -670,7 +670,7 @@ void scsi_req_complete(SCSIRequest *req)
assert(req->status != -1);
scsi_req_ref(req);
scsi_req_dequeue(req);
req->bus->ops->complete(req, SCSI_REASON_DONE, req->status);
req->bus->ops->complete(req, req->status);
scsi_req_unref(req);
}

9
hw/scsi.h
View File

@ -9,12 +9,6 @@
#define SCSI_CMD_BUF_SIZE 16
/* scsi-disk.c */
enum scsi_reason {
SCSI_REASON_DONE, /* Command complete. */
SCSI_REASON_DATA /* Transfer complete, more data required. */
};
typedef struct SCSIBus SCSIBus;
typedef struct SCSIBusOps SCSIBusOps;
typedef struct SCSIDevice SCSIDevice;
@ -84,7 +78,8 @@ struct SCSIDeviceInfo {
};
struct SCSIBusOps {
void (*complete)(SCSIRequest *req, int reason, uint32_t arg);
void (*transfer_data)(SCSIRequest *req, uint32_t arg);
void (*complete)(SCSIRequest *req, uint32_t arg);
void (*cancel)(SCSIRequest *req);
};

99
hw/spapr_vscsi.c
View File

@ -480,63 +480,34 @@ static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req)
}
/* Callback to indicate that the SCSI layer has completed a transfer. */
static void vscsi_command_complete(SCSIRequest *sreq, int reason, uint32_t arg)
static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t arg)
{
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent);
vscsi_req *req = vscsi_find_req(s, sreq);
uint8_t *buf;
int32_t res_in = 0, res_out = 0;
int len, rc = 0;
dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x arg=0x%x, req=%p\n",
reason, sreq->tag, arg, req);
dprintf("VSCSI: SCSI xfer complete tag=0x%x arg=0x%x, req=%p\n",
sreq->tag, arg, req);
if (req == NULL) {
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
return;
}
if (req->sensing) {
if (reason == SCSI_REASON_DONE) {
dprintf("VSCSI: Sense done !\n");
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
vscsi_put_req(s, req);
} else {
uint8_t *buf = scsi_req_get_buf(sreq);
uint8_t *buf = scsi_req_get_buf(sreq);
len = MIN(arg, 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 (reason == SCSI_REASON_DONE) {
dprintf("VSCSI: Command complete err=%d\n", arg);
if (arg == 0) {
/* We handle overflows, not underflows for normal commands,
* but hopefully nobody cares
*/
if (req->writing) {
res_out = req->data_len;
} else {
res_in = req->data_len;
}
vscsi_send_rsp(s, req, 0, res_in, res_out);
} else if (arg == CHECK_CONDITION) {
vscsi_send_request_sense(s, req);
return;
} else {
vscsi_send_rsp(s, req, arg, 0, 0);
}
vscsi_put_req(s, req);
len = MIN(arg, 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;
}
@ -559,6 +530,45 @@ static void vscsi_command_complete(SCSIRequest *sreq, int reason, uint32_t arg)
scsi_req_continue(sreq);
}
/* Callback to indicate that the SCSI layer has completed a transfer. */
static void vscsi_command_complete(SCSIRequest *sreq, uint32_t arg)
{
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent);
vscsi_req *req = vscsi_find_req(s, sreq);
int32_t res_in = 0, res_out = 0;
dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x arg=0x%x, req=%p\n",
reason, sreq->tag, arg, req);
if (req == NULL) {
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
return;
}
if (!req->sensing && arg == CHECK_CONDITION) {
vscsi_send_request_sense(s, req);
return;
}
if (req->sensing) {
dprintf("VSCSI: Sense done !\n");
arg = CHECK_CONDITION;
} else {
dprintf("VSCSI: Command complete err=%d\n", arg);
if (arg == 0) {
/* We handle overflows, not underflows for normal commands,
* but hopefully nobody cares
*/
if (req->writing) {
res_out = req->data_len;
} else {
res_in = req->data_len;
}
}
}
vscsi_send_rsp(s, req, 0, res_in, res_out);
vscsi_put_req(s, req);
}
static void vscsi_request_cancelled(SCSIRequest *sreq)
{
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent);
@ -916,6 +926,7 @@ static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data)
}
static const struct SCSIBusOps vscsi_scsi_ops = {
.transfer_data = vscsi_transfer_data,
.complete = vscsi_command_complete,
.cancel = vscsi_request_cancelled
};

71
hw/usb-msd.c
View File

@ -208,7 +208,7 @@ static void usb_msd_send_status(MSDState *s, USBPacket *p)
memcpy(p->data, &csw, len);
}
static void usb_msd_command_complete(SCSIRequest *req, int reason, uint32_t arg)
static void usb_msd_transfer_data(SCSIRequest *req, uint32_t arg)
{
MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent);
USBPacket *p = s->packet;
@ -216,35 +216,7 @@ static void usb_msd_command_complete(SCSIRequest *req, int reason, uint32_t arg)
if (req->tag != s->tag) {
fprintf(stderr, "usb-msd: Unexpected SCSI Tag 0x%x\n", req->tag);
}
if (reason == SCSI_REASON_DONE) {
DPRINTF("Command complete %d\n", arg);
s->residue = s->data_len;
s->result = arg != 0;
if (s->packet) {
if (s->data_len == 0 && s->mode == USB_MSDM_DATAOUT) {
/* A deferred packet with no write data remaining must be
the status read packet. */
usb_msd_send_status(s, p);
s->mode = USB_MSDM_CBW;
} else {
if (s->data_len) {
s->data_len -= s->usb_len;
if (s->mode == USB_MSDM_DATAIN)
memset(s->usb_buf, 0, s->usb_len);
s->usb_len = 0;
}
if (s->data_len == 0)
s->mode = USB_MSDM_CSW;
}
s->packet = NULL;
usb_packet_complete(&s->dev, p);
} else if (s->data_len == 0) {
s->mode = USB_MSDM_CSW;
}
scsi_req_unref(req);
s->req = NULL;
return;
}
assert((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV));
s->scsi_len = arg;
s->scsi_buf = scsi_req_get_buf(req);
@ -261,6 +233,44 @@ static void usb_msd_command_complete(SCSIRequest *req, int reason, uint32_t arg)
}
}
static void usb_msd_command_complete(SCSIRequest *req, uint32_t arg)
{
MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent);
USBPacket *p = s->packet;
if (req->tag != s->tag) {
fprintf(stderr, "usb-msd: Unexpected SCSI Tag 0x%x\n", req->tag);
}
DPRINTF("Command complete %d\n", arg);
s->residue = s->data_len;
s->result = arg != 0;
if (s->packet) {
if (s->data_len == 0 && s->mode == USB_MSDM_DATAOUT) {
/* A deferred packet with no write data remaining must be
the status read packet. */
usb_msd_send_status(s, p);
s->mode = USB_MSDM_CBW;
} else {
if (s->data_len) {
s->data_len -= s->usb_len;
if (s->mode == USB_MSDM_DATAIN) {
memset(s->usb_buf, 0, s->usb_len);
}
s->usb_len = 0;
}
if (s->data_len == 0) {
s->mode = USB_MSDM_CSW;
}
}
s->packet = NULL;
usb_packet_complete(&s->dev, p);
} else if (s->data_len == 0) {
s->mode = USB_MSDM_CSW;
}
scsi_req_unref(req);
s->req = NULL;
}
static void usb_msd_request_cancelled(SCSIRequest *req)
{
MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent);
@ -494,6 +504,7 @@ static void usb_msd_password_cb(void *opaque, int err)
}
static const struct SCSIBusOps usb_msd_scsi_ops = {
.transfer_data = usb_msd_transfer_data,
.complete = usb_msd_command_complete,
.cancel = usb_msd_request_cancelled
};