[PATCH] IB/mthca: Add SRQ implementation

Add mthca support for shared receive queues (SRQs),
including userspace SRQs.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_provider.h b/drivers/infiniband/hw/mthca/mthca_provider.h
index b95249ee46cf..024015678c8a 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.h
+++ b/drivers/infiniband/hw/mthca/mthca_provider.h
@@ -197,6 +197,29 @@ struct mthca_cq {
         wait_queue_head_t      wait;
 };
 
+struct mthca_srq {
+        struct ib_srq           ibsrq;
+        spinlock_t              lock;
+        atomic_t                refcount;
+        int                     srqn;
+        int                     max;
+        int                     max_gs;
+        int                     wqe_shift;
+        int                     first_free;
+        int                     last_free;
+        u16                     counter;  /* Arbel only */
+        int                     db_index; /* Arbel only */
+        __be32                 *db;       /* Arbel only */
+        void                   *last;
+
+        int                     is_direct;
+        u64                    *wrid;
+        union mthca_buf         queue;
+        struct mthca_mr         mr;
+
+        wait_queue_head_t       wait;
+};
+
 struct mthca_wq {
         spinlock_t lock;
         int        max;
@@ -277,6 +300,11 @@ static inline struct mthca_cq *to_mcq(struct ib_cq *ibcq)
         return container_of(ibcq, struct mthca_cq, ibcq);
 }
 
+static inline struct mthca_srq *to_msrq(struct ib_srq *ibsrq)
+{
+        return container_of(ibsrq, struct mthca_srq, ibsrq);
+}
+
 static inline struct mthca_qp *to_mqp(struct ib_qp *ibqp)
 {
         return container_of(ibqp, struct mthca_qp, ibqp);