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authorAlexey Kardashevskiy <aik@ozlabs.ru>2013-07-29 14:49:29 +1000
committerPaolo Bonzini <pbonzini@redhat.com>2013-09-12 08:46:21 +0200
commiteb37f14658df23c51f172bddb0c45eecf408927c (patch)
treeb20a80688ffca514d5c3f5310209b4e67bcfd96e
parent5accc8408f2dac1e00d888e4fe75e6174ba2a940 (diff)
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spapr-vscsi: add task management
At the moment the guest kernel issues two types of task management requests to the hypervisor - task about and lun reset. This adds handling for these tasks. As spapr-vscsi starts calling scsi_req_cancel(), free_request callback was implemented. As virtio-vscsi, spapr-vscsi does not handle CLEAR_ACA either as CDB control byte does not seem to be used at all so NACA bit is not set to the guest so the guest has no good reason to call CLEAR_ACA task. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> [Fix choice of UCSOLCNT vs. SCSOLCNT. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--hw/scsi/spapr_vscsi.c119
-rw-r--r--hw/scsi/srp.h7
2 files changed, 99 insertions, 27 deletions
diff --git a/hw/scsi/spapr_vscsi.c b/hw/scsi/spapr_vscsi.c
index b2fcd4b..c31a870 100644
--- a/hw/scsi/spapr_vscsi.c
+++ b/hw/scsi/spapr_vscsi.c
@@ -117,6 +117,20 @@ static struct vscsi_req *vscsi_get_req(VSCSIState *s)
return NULL;
}
+static struct vscsi_req *vscsi_find_req(VSCSIState *s, uint64_t srp_tag)
+{
+ vscsi_req *req;
+ int i;
+
+ for (i = 0; i < VSCSI_REQ_LIMIT; i++) {
+ req = &s->reqs[i];
+ if (req->iu.srp.cmd.tag == srp_tag) {
+ return req;
+ }
+ }
+ return NULL;
+}
+
static void vscsi_put_req(vscsi_req *req)
{
if (req->sreq != NULL) {
@@ -755,40 +769,91 @@ static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req)
static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req)
{
union viosrp_iu *iu = &req->iu;
- int fn;
+ vscsi_req *tmpreq;
+ int i, lun = 0, resp = SRP_TSK_MGMT_COMPLETE;
+ SCSIDevice *d;
+ uint64_t tag = iu->srp.rsp.tag;
+ uint8_t sol_not = iu->srp.cmd.sol_not;
fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n",
iu->srp.tsk_mgmt.tsk_mgmt_func);
- switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
-#if 0 /* We really don't deal with these for now */
- case SRP_TSK_ABORT_TASK:
- fn = ABORT_TASK;
- break;
- case SRP_TSK_ABORT_TASK_SET:
- fn = ABORT_TASK_SET;
- break;
- case SRP_TSK_CLEAR_TASK_SET:
- fn = CLEAR_TASK_SET;
- break;
- case SRP_TSK_LUN_RESET:
- fn = LOGICAL_UNIT_RESET;
- break;
- case SRP_TSK_CLEAR_ACA:
- fn = CLEAR_ACA;
- break;
-#endif
- default:
- fn = 0;
+ d = vscsi_device_find(&s->bus, be64_to_cpu(req->iu.srp.tsk_mgmt.lun), &lun);
+ if (!d) {
+ resp = SRP_TSK_MGMT_FIELDS_INVALID;
+ } else {
+ switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
+ case SRP_TSK_ABORT_TASK:
+ if (d->lun != lun) {
+ resp = SRP_TSK_MGMT_FIELDS_INVALID;
+ break;
+ }
+
+ tmpreq = vscsi_find_req(s, req->iu.srp.tsk_mgmt.task_tag);
+ if (tmpreq && tmpreq->sreq) {
+ assert(tmpreq->sreq->hba_private);
+ scsi_req_cancel(tmpreq->sreq);
+ }
+ break;
+
+ case SRP_TSK_LUN_RESET:
+ if (d->lun != lun) {
+ resp = SRP_TSK_MGMT_FIELDS_INVALID;
+ break;
+ }
+
+ qdev_reset_all(&d->qdev);
+ break;
+
+ case SRP_TSK_ABORT_TASK_SET:
+ case SRP_TSK_CLEAR_TASK_SET:
+ if (d->lun != lun) {
+ resp = SRP_TSK_MGMT_FIELDS_INVALID;
+ break;
+ }
+
+ for (i = 0; i < VSCSI_REQ_LIMIT; i++) {
+ tmpreq = &s->reqs[i];
+ if (tmpreq->iu.srp.cmd.lun != req->iu.srp.tsk_mgmt.lun) {
+ continue;
+ }
+ if (!tmpreq->active || !tmpreq->sreq) {
+ continue;
+ }
+ assert(tmpreq->sreq->hba_private);
+ scsi_req_cancel(tmpreq->sreq);
+ }
+ break;
+
+ case SRP_TSK_CLEAR_ACA:
+ resp = SRP_TSK_MGMT_NOT_SUPPORTED;
+ break;
+
+ default:
+ resp = SRP_TSK_MGMT_FIELDS_INVALID;
+ break;
+ }
}
- if (fn) {
- /* XXX Send/Handle target task management */
- ;
+
+ /* Compose the response here as */
+ memset(iu, 0, sizeof(struct srp_rsp) + 4);
+ iu->srp.rsp.opcode = SRP_RSP;
+ iu->srp.rsp.req_lim_delta = cpu_to_be32(1);
+ iu->srp.rsp.tag = tag;
+ iu->srp.rsp.flags |= SRP_RSP_FLAG_RSPVALID;
+ iu->srp.rsp.resp_data_len = cpu_to_be32(4);
+ if (resp) {
+ iu->srp.rsp.sol_not = (sol_not & 0x04) >> 2;
} else {
- vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0);
- vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
+ iu->srp.rsp.sol_not = (sol_not & 0x02) >> 1;
}
- return !fn;
+
+ iu->srp.rsp.status = GOOD;
+ iu->srp.rsp.data[3] = resp;
+
+ vscsi_send_iu(s, req, sizeof(iu->srp.rsp) + 4, VIOSRP_SRP_FORMAT);
+
+ return 1;
}
static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req)
diff --git a/hw/scsi/srp.h b/hw/scsi/srp.h
index 5e0cad5..d27f31d 100644
--- a/hw/scsi/srp.h
+++ b/hw/scsi/srp.h
@@ -90,6 +90,13 @@ enum {
SRP_REV16A_IB_IO_CLASS = 0x0100
};
+enum {
+ SRP_TSK_MGMT_COMPLETE = 0x00,
+ SRP_TSK_MGMT_FIELDS_INVALID = 0x02,
+ SRP_TSK_MGMT_NOT_SUPPORTED = 0x04,
+ SRP_TSK_MGMT_FAILED = 0x05
+};
+
struct srp_direct_buf {
uint64_t va;
uint32_t key;