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-rw-r--r--include/rdma/ib_verbs.h47
1 files changed, 37 insertions, 10 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 765589f4d166..5342ac64ed1a 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -431,9 +431,11 @@ struct ib_wc {
u8 port_num; /* valid only for DR SMPs on switches */
};
-enum ib_cq_notify {
- IB_CQ_SOLICITED,
- IB_CQ_NEXT_COMP
+enum ib_cq_notify_flags {
+ IB_CQ_SOLICITED = 1 << 0,
+ IB_CQ_NEXT_COMP = 1 << 1,
+ IB_CQ_SOLICITED_MASK = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
+ IB_CQ_REPORT_MISSED_EVENTS = 1 << 2,
};
enum ib_srq_attr_mask {
@@ -912,6 +914,8 @@ struct ib_device {
u32 flags;
+ int num_comp_vectors;
+
struct iw_cm_verbs *iwcm;
int (*query_device)(struct ib_device *device,
@@ -978,6 +982,7 @@ struct ib_device {
struct ib_recv_wr *recv_wr,
struct ib_recv_wr **bad_recv_wr);
struct ib_cq * (*create_cq)(struct ib_device *device, int cqe,
+ int comp_vector,
struct ib_ucontext *context,
struct ib_udata *udata);
int (*destroy_cq)(struct ib_cq *cq);
@@ -987,7 +992,7 @@ struct ib_device {
struct ib_wc *wc);
int (*peek_cq)(struct ib_cq *cq, int wc_cnt);
int (*req_notify_cq)(struct ib_cq *cq,
- enum ib_cq_notify cq_notify);
+ enum ib_cq_notify_flags flags);
int (*req_ncomp_notif)(struct ib_cq *cq,
int wc_cnt);
struct ib_mr * (*get_dma_mr)(struct ib_pd *pd,
@@ -1358,13 +1363,15 @@ static inline int ib_post_recv(struct ib_qp *qp,
* @cq_context: Context associated with the CQ returned to the user via
* the associated completion and event handlers.
* @cqe: The minimum size of the CQ.
+ * @comp_vector - Completion vector used to signal completion events.
+ * Must be >= 0 and < context->num_comp_vectors.
*
* Users can examine the cq structure to determine the actual CQ size.
*/
struct ib_cq *ib_create_cq(struct ib_device *device,
ib_comp_handler comp_handler,
void (*event_handler)(struct ib_event *, void *),
- void *cq_context, int cqe);
+ void *cq_context, int cqe, int comp_vector);
/**
* ib_resize_cq - Modifies the capacity of the CQ.
@@ -1414,14 +1421,34 @@ int ib_peek_cq(struct ib_cq *cq, int wc_cnt);
/**
* ib_req_notify_cq - Request completion notification on a CQ.
* @cq: The CQ to generate an event for.
- * @cq_notify: If set to %IB_CQ_SOLICITED, completion notification will
- * occur on the next solicited event. If set to %IB_CQ_NEXT_COMP,
- * notification will occur on the next completion.
+ * @flags:
+ * Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
+ * to request an event on the next solicited event or next work
+ * completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
+ * may also be |ed in to request a hint about missed events, as
+ * described below.
+ *
+ * Return Value:
+ * < 0 means an error occurred while requesting notification
+ * == 0 means notification was requested successfully, and if
+ * IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
+ * were missed and it is safe to wait for another event. In
+ * this case is it guaranteed that any work completions added
+ * to the CQ since the last CQ poll will trigger a completion
+ * notification event.
+ * > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
+ * in. It means that the consumer must poll the CQ again to
+ * make sure it is empty to avoid missing an event because of a
+ * race between requesting notification and an entry being
+ * added to the CQ. This return value means it is possible
+ * (but not guaranteed) that a work completion has been added
+ * to the CQ since the last poll without triggering a
+ * completion notification event.
*/
static inline int ib_req_notify_cq(struct ib_cq *cq,
- enum ib_cq_notify cq_notify)
+ enum ib_cq_notify_flags flags)
{
- return cq->device->req_notify_cq(cq, cq_notify);
+ return cq->device->req_notify_cq(cq, flags);
}
/**