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external_code/nvme: process completion queue

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Added function that check the completion queue for completed commands,
executes their callbacks, and puts the associated requests back onto the
free request queue.

Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Change-Id: I0f04c0d173a7058d4d4f7e59e573ce48130ff024
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/6676
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
This commit is contained in:
Konrad Sztyber 2021-02-22 13:49:07 +01:00 committed by Tomasz Zawadzki
parent c4d01aa5b7
commit 71c69ddfc3
1 changed files with 39 additions and 0 deletions
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39
test/external_code/nvme/nvme.c
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@ -433,6 +433,45 @@ identify_ctrlr(struct nvme_ctrlr *ctrlr)
return 0;
}
int32_t process_completions(struct nvme_qpair *qpair);
int32_t
process_completions(struct nvme_qpair *qpair)
{
struct spdk_nvme_cpl *cpl;
struct nvme_request *request;
int32_t max_completions, num_completions = 0;
max_completions = qpair->num_entries - 1;
while (1) {
cpl = &qpair->cpl[qpair->cq_head];
if (cpl->status.p != qpair->phase) {
break;
}
if (spdk_unlikely(++qpair->cq_head == qpair->num_entries)) {
qpair->cq_head = 0;
qpair->phase = !qpair->phase;
}
qpair->sq_head = cpl->sqhd;
request = &qpair->requests[cpl->cid];
request->cb_fn(request->cb_arg, cpl);
TAILQ_INSERT_TAIL(&qpair->free_requests, request, tailq);
if (++num_completions == max_completions) {
break;
}
}
if (num_completions > 0) {
spdk_mmio_write_4(qpair->cq_hdbl, qpair->cq_head);
}
return num_completions;
}
static int
process_ctrlr_init(struct nvme_ctrlr *ctrlr)
{