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nvmf/vfio-user: don't use Guest's phase bit for completion response

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We should maintain phase bit in vfio-user target, it's not safe
to use Guest completion queue's phase bit.

Change-Id: I94856853784802f7695a0484b783d8de4042f8a6
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/8988
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Ziye Yang <ziye.yang@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Thanos Makatos <thanos.makatos@nutanix.com>
This commit is contained in:
Changpeng Liu 2021-08-02 18:06:10 +08:00
parent a93387f69f
commit 2f85499e43
1 changed files with 11 additions and 2 deletions
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13
lib/nvmf/vfio_user.c
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@ -122,6 +122,7 @@ struct nvme_q {
uint32_t tail;
uint16_t iv;
bool ien;
bool phase;
};
};
};
@ -739,7 +740,13 @@ cq_tail_advance(struct nvme_q *q)
assert(q != NULL);
assert(q->is_cq);
q->tail = cq_next(q);
assert(q->tail < q->size);
q->tail++;
if (spdk_unlikely(q->tail == q->size)) {
q->tail = 0;
q->phase = !q->phase;
}
}
static int
@ -761,6 +768,7 @@ acq_setup(struct nvmf_vfio_user_ctrlr *ctrlr)
cq->tail = 0;
cq->is_cq = true;
cq->ien = true;
cq->phase = true;
ret = map_q(ctrlr, cq, true, true);
if (ret) {
@ -873,7 +881,7 @@ post_completion(struct nvmf_vfio_user_ctrlr *ctrlr, struct nvme_q *cq,
cpl->status.dnr = 0x0;
cpl->status.m = 0x0;
cpl->status.sct = sct;
cpl->status.p = ~cpl->status.p;
cpl->status.p = cq->phase;
cpl->status.sc = sc;
cq_tail_advance(cq);
@ -1150,6 +1158,7 @@ handle_create_io_q(struct nvmf_vfio_user_ctrlr *ctrlr,
}
io_q->ien = cmd->cdw11_bits.create_io_cq.ien;
io_q->iv = cmd->cdw11_bits.create_io_cq.iv;
io_q->phase = true;
} else {
/* CQ must be created before SQ */
if (!lookup_io_q(ctrlr, cmd->cdw11_bits.create_io_sq.cqid, true)) {