Commit 71c69ddf authored by Konrad Sztyber's avatar Konrad Sztyber Committed by Tomasz Zawadzki
Browse files

external_code/nvme: process completion queue 



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: default avatarKonrad Sztyber <konrad.sztyber@intel.com>
Change-Id: I0f04c0d173a7058d4d4f7e59e573ce48130ff024
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/6676


Reviewed-by: default avatarTomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
parent c4d01aa5

test/external_code/nvme/nvme.c

+39 −0
Original line number Diff line number Diff line
@@ -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)

{