IB/mlx4: Add support for XRC SRQs

Allow the user to create XRC SRQs.  This patch is based on a patch
from Jack Morgenstrein <jackm@dev.mellanox.co.il>.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 11 insertions, 9 deletions

diff --git a/drivers/net/mlx4/srq.c b/drivers/net/mlx4/srq.c
index 3b07b80a0456..a20b141dbb5c 100644
--- a/drivers/net/mlx4/srq.c
+++ b/drivers/net/mlx4/srq.c
@@ -40,20 +40,20 @@
 struct mlx4_srq_context {
         __be32                  state_logsize_srqn;
         u8                      logstride;
-        u8                      reserved1[3];
-        u8                      pg_offset;
-        u8                      reserved2[3];
-        u32                     reserved3;
+        u8                      reserved1;
+        __be16                  xrcd;
+        __be32                  pg_offset_cqn;
+        u32                     reserved2;
         u8                      log_page_size;
-        u8                      reserved4[2];
+        u8                      reserved3[2];
         u8                      mtt_base_addr_h;
         __be32                  mtt_base_addr_l;
         __be32                  pd;
         __be16                  limit_watermark;
         __be16                  wqe_cnt;
-        u16                     reserved5;
+        u16                     reserved4;
         __be16                  wqe_counter;
-        u32                     reserved6;
+        u32                     reserved5;
         __be64                  db_rec_addr;
 };
 
@@ -109,8 +109,8 @@ static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox
                             MLX4_CMD_TIME_CLASS_A);
 }
 
-int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, struct mlx4_mtt *mtt,
-                   u64 db_rec, struct mlx4_srq *srq)
+int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, u32 cqn, u16 xrcd,
+                   struct mlx4_mtt *mtt, u64 db_rec, struct mlx4_srq *srq)
 {
         struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
         struct mlx4_cmd_mailbox *mailbox;
@@ -148,6 +148,8 @@ int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, struct mlx4_mtt *mtt,
         srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) |
                                                       srq->srqn);
         srq_context->logstride          = srq->wqe_shift - 4;
+        srq_context->xrcd               = cpu_to_be16(xrcd);
+        srq_context->pg_offset_cqn      = cpu_to_be32(cqn & 0xffffff);
         srq_context->log_page_size      = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
 
         mtt_addr = mlx4_mtt_addr(dev, mtt);