scsi: pass cdb already to scsi_req_new

Right now the CDB is not passed to the SCSIBus until scsi_req_enqueue.
Passing it to scsi_req_new will let scsi_req_new dispatch common requests
through different reqops.

Moving the memcpy to scsi_req_new is a hack that will go away as
soon as scsi_req_new will also take care of the parsing.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

hw/esp.c

@@ -244,8 +244,8 @@ 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, NULL);
-    datalen = scsi_req_enqueue(s->current_req, buf);
+    s->current_req = scsi_req_new(s->current_dev, 0, lun, buf, NULL);
+    datalen = scsi_req_enqueue(s->current_req);
     s->ti_size = datalen;
     if (datalen != 0) {
         s->rregs[ESP_RSTAT] = STAT_TC;

hw/lsi53c895a.c

@@ -781,10 +781,10 @@ 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, buf,
                                    s->current);
 
-    n = scsi_req_enqueue(s->current->req, buf);
+    n = scsi_req_enqueue(s->current->req);
     if (n) {
         if (n > 0) {
             lsi_set_phase(s, PHASE_DI);

hw/scsi-bus.c

@@ -153,9 +153,12 @@ SCSIRequest *scsi_req_alloc(SCSIReqOps *reqops, SCSIDevice *d, uint32_t tag,
 }
 
 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
-                          void *hba_private)
+                          uint8_t *buf, void *hba_private)
 {
-    return d->info->alloc_req(d, tag, lun, hba_private);
+    SCSIRequest *req;
+    req = d->info->alloc_req(d, tag, lun, hba_private);
+    memcpy(req->cmd.buf, buf, 16);
+    return req;
 }
 
 uint8_t *scsi_req_get_buf(SCSIRequest *req)
@@ -189,7 +192,7 @@ void scsi_req_build_sense(SCSIRequest *req, SCSISense sense)
     req->sense_len = 18;
 }
 
-int32_t scsi_req_enqueue(SCSIRequest *req, uint8_t *buf)
+int32_t scsi_req_enqueue(SCSIRequest *req)
 {
     int32_t rc;
 
@@ -199,7 +202,7 @@ int32_t scsi_req_enqueue(SCSIRequest *req, uint8_t *buf)
     QTAILQ_INSERT_TAIL(&req->dev->requests, req, next);
 
     scsi_req_ref(req);
-    rc = req->ops->send_command(req, buf);
+    rc = req->ops->send_command(req, req->cmd.buf);
     scsi_req_unref(req);
     return rc;
 }
@@ -431,7 +434,7 @@ int scsi_req_parse(SCSIRequest *req, uint8_t *buf)
     if (rc != 0)
         return rc;
 
-    memcpy(req->cmd.buf, buf, req->cmd.len);
+    assert(buf == req->cmd.buf);
     scsi_req_xfer_mode(req);
     req->cmd.lba = scsi_req_lba(req);
     trace_scsi_req_parsed(req->dev->id, req->lun, req->tag, buf[0],

hw/scsi.h

@@ -154,8 +154,8 @@ int scsi_sense_valid(SCSISense sense);
 SCSIRequest *scsi_req_alloc(SCSIReqOps *reqops, 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);
+                          uint8_t *buf, void *hba_private);
+int32_t scsi_req_enqueue(SCSIRequest *req);
 void scsi_req_free(SCSIRequest *req);
 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 void scsi_req_unref(SCSIRequest *req);

hw/spapr_vscsi.c

@@ -600,8 +600,8 @@ static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req)
     }
 
     req->lun = lun;
-    req->sreq = scsi_req_new(sdev, req->qtag, lun, req);
-    n = scsi_req_enqueue(req->sreq, srp->cmd.cdb);
+    req->sreq = scsi_req_new(sdev, req->qtag, lun, srp->cmd.cdb, req);
+    n = scsi_req_enqueue(req->sreq);
 
     dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
             req->qtag, srp->cmd.cdb[0], id, lun, n);

hw/usb-msd.c

@@ -370,8 +370,8 @@ 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, NULL);
-            scsi_req_enqueue(s->req, cbw.cmd);
+            s->req = scsi_req_new(s->scsi_dev, s->tag, 0, cbw.cmd, NULL);
+            scsi_req_enqueue(s->req);
             /* ??? Should check that USB and SCSI data transfer
                directions match.  */
             if (s->mode != USB_MSDM_CSW && s->residue == 0) {