RDMA/bnxt_re: Add SRQ support for Broadcom adapters
Shared receive queue (SRQ) is defined as a pool of
receive buffers shared among multiple QPs which belong
to same protection domain in a given process context.
Use of SRQ reduces the memory foot print of IB applications.
Broadcom adapters support SRQ, adding code-changes to enable
shared receive queue.
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index 3caf70a..508d00a 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -588,6 +588,12 @@ static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
ibdev->query_ah = bnxt_re_query_ah;
ibdev->destroy_ah = bnxt_re_destroy_ah;
+ ibdev->create_srq = bnxt_re_create_srq;
+ ibdev->modify_srq = bnxt_re_modify_srq;
+ ibdev->query_srq = bnxt_re_query_srq;
+ ibdev->destroy_srq = bnxt_re_destroy_srq;
+ ibdev->post_srq_recv = bnxt_re_post_srq_recv;
+
ibdev->create_qp = bnxt_re_create_qp;
ibdev->modify_qp = bnxt_re_modify_qp;
ibdev->query_qp = bnxt_re_query_qp;
@@ -689,10 +695,10 @@ static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
return rdev;
}
-static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
- struct creq_func_event *aeqe)
+static int bnxt_re_handle_unaffi_async_event(struct creq_func_event
+ *unaffi_async)
{
- switch (aeqe->event) {
+ switch (unaffi_async->event) {
case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
break;
case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
@@ -721,6 +727,93 @@ static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
return 0;
}
+static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
+ struct bnxt_re_qp *qp)
+{
+ struct ib_event event;
+
+ memset(&event, 0, sizeof(event));
+ if (qp->qplib_qp.srq) {
+ event.device = &qp->rdev->ibdev;
+ event.element.qp = &qp->ib_qp;
+ event.event = IB_EVENT_QP_LAST_WQE_REACHED;
+ }
+
+ if (event.device && qp->ib_qp.event_handler)
+ qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context);
+
+ return 0;
+}
+
+static int bnxt_re_handle_affi_async_event(struct creq_qp_event *affi_async,
+ void *obj)
+{
+ int rc = 0;
+ u8 event;
+
+ if (!obj)
+ return rc; /* QP was already dead, still return success */
+
+ event = affi_async->event;
+ if (event == CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION) {
+ struct bnxt_qplib_qp *lib_qp = obj;
+ struct bnxt_re_qp *qp = container_of(lib_qp, struct bnxt_re_qp,
+ qplib_qp);
+ rc = bnxt_re_handle_qp_async_event(affi_async, qp);
+ }
+ return rc;
+}
+
+static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
+ void *aeqe, void *obj)
+{
+ struct creq_qp_event *affi_async;
+ struct creq_func_event *unaffi_async;
+ u8 type;
+ int rc;
+
+ type = ((struct creq_base *)aeqe)->type;
+ if (type == CREQ_BASE_TYPE_FUNC_EVENT) {
+ unaffi_async = aeqe;
+ rc = bnxt_re_handle_unaffi_async_event(unaffi_async);
+ } else {
+ affi_async = aeqe;
+ rc = bnxt_re_handle_affi_async_event(affi_async, obj);
+ }
+
+ return rc;
+}
+
+static int bnxt_re_srqn_handler(struct bnxt_qplib_nq *nq,
+ struct bnxt_qplib_srq *handle, u8 event)
+{
+ struct bnxt_re_srq *srq = container_of(handle, struct bnxt_re_srq,
+ qplib_srq);
+ struct ib_event ib_event;
+ int rc = 0;
+
+ if (!srq) {
+ dev_err(NULL, "%s: SRQ is NULL, SRQN not handled",
+ ROCE_DRV_MODULE_NAME);
+ rc = -EINVAL;
+ goto done;
+ }
+ ib_event.device = &srq->rdev->ibdev;
+ ib_event.element.srq = &srq->ib_srq;
+ if (event == NQ_SRQ_EVENT_EVENT_SRQ_THRESHOLD_EVENT)
+ ib_event.event = IB_EVENT_SRQ_LIMIT_REACHED;
+ else
+ ib_event.event = IB_EVENT_SRQ_ERR;
+
+ if (srq->ib_srq.event_handler) {
+ /* Lock event_handler? */
+ (*srq->ib_srq.event_handler)(&ib_event,
+ srq->ib_srq.srq_context);
+ }
+done:
+ return rc;
+}
+
static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
struct bnxt_qplib_cq *handle)
{
@@ -763,7 +856,8 @@ static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1],
i - 1, rdev->msix_entries[i].vector,
rdev->msix_entries[i].db_offset,
- &bnxt_re_cqn_handler, NULL);
+ &bnxt_re_cqn_handler,
+ &bnxt_re_srqn_handler);
if (rc) {
dev_err(rdev_to_dev(rdev),