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scsi: Add 'hba_private' to SCSIRequest 

'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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2
hw/esp.c
View File

@ -244,7 +244,7 @@ static void do_busid_cmd(ESPState *s, uint8_t *buf, uint8_t busid)
DPRINTF("do_busid_cmd: busid 0x%x\n", busid);
lun = busid & 7;
s->current_req = scsi_req_new(s->current_dev, 0, lun);
s->current_req = scsi_req_new(s->current_dev, 0, lun, NULL);
datalen = scsi_req_enqueue(s->current_req, buf);
s->ti_size = datalen;
if (datalen != 0) {

22
hw/lsi53c895a.c
View File

@ -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) {

9
hw/scsi-bus.c
View File

@ -131,7 +131,8 @@ int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
return res;
}
SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun)
SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag,
uint32_t lun, void *hba_private)
{
SCSIRequest *req;
@ -141,14 +142,16 @@ SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t l
req->dev = d;
req->tag = tag;
req->lun = lun;
req->hba_private = hba_private;
req->status = -1;
trace_scsi_req_alloc(req->dev->id, req->lun, req->tag);
return req;
}
SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun)
SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
void *hba_private)
{
return d->info->alloc_req(d, tag, lun);
return d->info->alloc_req(d, tag, lun, hba_private);
}
uint8_t *scsi_req_get_buf(SCSIRequest *req)

4
hw/scsi-disk.c
View File

@ -81,13 +81,13 @@ static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type);
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf);
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag,
uint32_t lun)
uint32_t lun, void *hba_private)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIRequest *req;
SCSIDiskReq *r;
req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun);
req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun, hba_private);
r = DO_UPCAST(SCSIDiskReq, req, req);
r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE);
return req;

5
hw/scsi-generic.c
View File

@ -96,11 +96,12 @@ static int scsi_get_sense(SCSIRequest *req, uint8_t *outbuf, int len)
return size;
}
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
void *hba_private)
{
SCSIRequest *req;
req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun);
req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun, hba_private);
return req;
}

10
hw/scsi.h
View File

@ -43,6 +43,7 @@ struct SCSIRequest {
} cmd;
BlockDriverAIOCB *aiocb;
bool enqueued;
void *hba_private;
QTAILQ_ENTRY(SCSIRequest) next;
};
@ -67,7 +68,8 @@ struct SCSIDeviceInfo {
DeviceInfo qdev;
scsi_qdev_initfn init;
void (*destroy)(SCSIDevice *s);
SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun);
SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
void *hba_private);
void (*free_req)(SCSIRequest *req);
int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
void (*read_data)(SCSIRequest *req);
@ -138,8 +140,10 @@ extern const struct SCSISense sense_code_LUN_FAILURE;
int scsi_build_sense(SCSISense sense, uint8_t *buf, int len, int fixed);
int scsi_sense_valid(SCSISense sense);
SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun);
SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun);
SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag,
uint32_t lun, void *hba_private);
SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
void *hba_private);
int32_t scsi_req_enqueue(SCSIRequest *req, uint8_t *buf);
void scsi_req_free(SCSIRequest *req);
SCSIRequest *scsi_req_ref(SCSIRequest *req);

28
hw/spapr_vscsi.c
View File

@ -121,7 +121,7 @@ static struct vscsi_req *vscsi_get_req(VSCSIState *s)
return NULL;
}
static void vscsi_put_req(VSCSIState *s, vscsi_req *req)
static void vscsi_put_req(vscsi_req *req)
{
if (req->sreq != NULL) {
scsi_req_unref(req->sreq);
@ -130,15 +130,6 @@ static void vscsi_put_req(VSCSIState *s, vscsi_req *req)
req->active = 0;
}
static vscsi_req *vscsi_find_req(VSCSIState *s, SCSIRequest *req)
{
uint32_t tag = req->tag;
if (tag >= VSCSI_REQ_LIMIT || !s->reqs[tag].active) {
return NULL;
}
return &s->reqs[tag];
}
static void vscsi_decode_id_lun(uint64_t srp_lun, int *id, int *lun)
{
/* XXX Figure that one out properly ! This is crackpot */
@ -454,7 +445,7 @@ static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req)
if (n) {
req->senselen = n;
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
vscsi_put_req(s, req);
vscsi_put_req(req);
return;
}
@ -483,7 +474,7 @@ static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req)
static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len)
{
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent);
vscsi_req *req = vscsi_find_req(s, sreq);
vscsi_req *req = sreq->hba_private;
uint8_t *buf;
int rc = 0;
@ -531,7 +522,7 @@ static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len)
static void vscsi_command_complete(SCSIRequest *sreq, uint32_t status)
{
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent);
vscsi_req *req = vscsi_find_req(s, sreq);
vscsi_req *req = sreq->hba_private;
int32_t res_in = 0, res_out = 0;
dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x status=0x%x, req=%p\n",
@ -563,15 +554,14 @@ static void vscsi_command_complete(SCSIRequest *sreq, uint32_t status)
}
}
vscsi_send_rsp(s, req, 0, res_in, res_out);
vscsi_put_req(s, req);
vscsi_put_req(req);
}
static void vscsi_request_cancelled(SCSIRequest *sreq)
{
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent);
vscsi_req *req = vscsi_find_req(s, sreq);
vscsi_req *req = sreq->hba_private;
vscsi_put_req(s, req);
vscsi_put_req(req);
}
static void vscsi_process_login(VSCSIState *s, vscsi_req *req)
@ -659,7 +649,7 @@ static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req)
}
req->lun = lun;
req->sreq = scsi_req_new(sdev, req->qtag, lun);
req->sreq = scsi_req_new(sdev, req->qtag, lun, req);
n = scsi_req_enqueue(req->sreq, srp->cmd.cdb);
dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
@ -858,7 +848,7 @@ static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq)
}
if (done) {
vscsi_put_req(s, req);
vscsi_put_req(req);
}
}

9
hw/usb-msd.c
View File

@ -216,10 +216,6 @@ static void usb_msd_transfer_data(SCSIRequest *req, uint32_t len)
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);
}
assert((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV));
s->scsi_len = len;
s->scsi_buf = scsi_req_get_buf(req);
@ -241,9 +237,6 @@ static void usb_msd_command_complete(SCSIRequest *req, uint32_t status)
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", status);
s->residue = s->data_len;
s->result = status != 0;
@ -387,7 +380,7 @@ static int usb_msd_handle_data(USBDevice *dev, USBPacket *p)
s->tag, cbw.flags, cbw.cmd_len, s->data_len);
s->residue = 0;
s->scsi_len = 0;
s->req = scsi_req_new(s->scsi_dev, s->tag, 0);
s->req = scsi_req_new(s->scsi_dev, s->tag, 0, NULL);
scsi_req_enqueue(s->req, cbw.cmd);
/* ??? Should check that USB and SCSI data transfer
directions match. */