IB/mlx4: Add support for modifying CQ moderation parameters

Signed-off-by: Eli Cohen <eli@mellnaox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 37 insertions, 7 deletions

diff --git a/drivers/net/mlx4/cq.c b/drivers/net/mlx4/cq.c
index d4441fee3d80..8c314341434f 100644
--- a/drivers/net/mlx4/cq.c
+++ b/drivers/net/mlx4/cq.c
@@ -38,6 +38,7 @@
 #include <linux/hardirq.h>
 
 #include <linux/mlx4/cmd.h>
+#include <linux/mlx4/cq.h>
 
 #include "mlx4.h"
 #include "icm.h"
@@ -47,21 +48,19 @@ struct mlx4_cq_context {
         u16                     reserved1[3];
         __be16                  page_offset;
         __be32                  logsize_usrpage;
-        u8                      reserved2;
-        u8                      cq_period;
-        u8                      reserved3;
-        u8                      cq_max_count;
-        u8                      reserved4[3];
+        __be16                  cq_period;
+        __be16                  cq_max_count;
+        u8                      reserved2[3];
         u8                      comp_eqn;
         u8                      log_page_size;
-        u8                      reserved5[2];
+        u8                      reserved3[2];
         u8                      mtt_base_addr_h;
         __be32                  mtt_base_addr_l;
         __be32                  last_notified_index;
         __be32                  solicit_producer_index;
         __be32                  consumer_index;
         __be32                  producer_index;
-        u32                     reserved6[2];
+        u32                     reserved4[2];
         __be64                  db_rec_addr;
 };
 
@@ -121,6 +120,13 @@ static int mlx4_SW2HW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
                         MLX4_CMD_TIME_CLASS_A);
 }
 
+static int mlx4_MODIFY_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+                         int cq_num, u32 opmod)
+{
+        return mlx4_cmd(dev, mailbox->dma, cq_num, opmod, MLX4_CMD_MODIFY_CQ,
+                        MLX4_CMD_TIME_CLASS_A);
+}
+
 static int mlx4_HW2SW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
                          int cq_num)
 {
@@ -129,6 +135,30 @@ static int mlx4_HW2SW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
                             MLX4_CMD_TIME_CLASS_A);
 }
 
+int mlx4_cq_modify(struct mlx4_dev *dev, struct mlx4_cq *cq,
+                   u16 count, u16 period)
+{
+        struct mlx4_cmd_mailbox *mailbox;
+        struct mlx4_cq_context *cq_context;
+        int err;
+
+        mailbox = mlx4_alloc_cmd_mailbox(dev);
+        if (IS_ERR(mailbox))
+                return PTR_ERR(mailbox);
+
+        cq_context = mailbox->buf;
+        memset(cq_context, 0, sizeof *cq_context);
+
+        cq_context->cq_max_count = cpu_to_be16(count);
+        cq_context->cq_period    = cpu_to_be16(period);
+
+        err = mlx4_MODIFY_CQ(dev, mailbox, cq->cqn, 1);
+
+        mlx4_free_cmd_mailbox(dev, mailbox);
+        return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_cq_modify);
+
 int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt,
                   struct mlx4_uar *uar, u64 db_rec, struct mlx4_cq *cq)
 {