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>

6 files changed, 51 insertions, 8 deletions

diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 7d70af7952b0..e4fb64b118e3 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -85,6 +85,14 @@ static struct mlx4_cqe *next_cqe_sw(struct mlx4_ib_cq *cq)
         return get_sw_cqe(cq, cq->mcq.cons_index);
 }
 
+int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
+{
+        struct mlx4_ib_cq *mcq = to_mcq(cq);
+        struct mlx4_ib_dev *dev = to_mdev(cq->device);
+
+        return mlx4_cq_modify(dev->dev, &mcq->mcq, cq_count, cq_period);
+}
+
 struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
                                 struct ib_ucontext *context,
                                 struct ib_udata *udata)
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index e9330a0d6c03..76dd45c764b4 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -609,6 +609,7 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
         ibdev->ib_dev.post_send         = mlx4_ib_post_send;
         ibdev->ib_dev.post_recv         = mlx4_ib_post_recv;
         ibdev->ib_dev.create_cq         = mlx4_ib_create_cq;
+        ibdev->ib_dev.modify_cq         = mlx4_ib_modify_cq;
         ibdev->ib_dev.destroy_cq        = mlx4_ib_destroy_cq;
         ibdev->ib_dev.poll_cq           = mlx4_ib_poll_cq;
         ibdev->ib_dev.req_notify_cq     = mlx4_ib_arm_cq;
diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index 3f8bd0a37b96..ef8ad96e1432 100644
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -254,6 +254,7 @@ struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
                                   struct ib_udata *udata);
 int mlx4_ib_dereg_mr(struct ib_mr *mr);
 
+int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
 struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
                                 struct ib_ucontext *context,
                                 struct ib_udata *udata);
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)
 {
diff --git a/include/linux/mlx4/cmd.h b/include/linux/mlx4/cmd.h
index 7d1eaa97de13..77323a72dd3c 100644
--- a/include/linux/mlx4/cmd.h
+++ b/include/linux/mlx4/cmd.h
@@ -81,7 +81,7 @@ enum {
         MLX4_CMD_SW2HW_CQ        = 0x16,
         MLX4_CMD_HW2SW_CQ        = 0x17,
         MLX4_CMD_QUERY_CQ        = 0x18,
-        MLX4_CMD_RESIZE_CQ       = 0x2c,
+        MLX4_CMD_MODIFY_CQ       = 0x2c,
 
         /* SRQ commands */
         MLX4_CMD_SW2HW_SRQ       = 0x35,
diff --git a/include/linux/mlx4/cq.h b/include/linux/mlx4/cq.h
index 1243ebace561..f7c3511c594b 100644
--- a/include/linux/mlx4/cq.h
+++ b/include/linux/mlx4/cq.h
@@ -130,4 +130,7 @@ enum {
         MLX4_CQ_DB_REQ_NOT              = 2 << 24
 };
 
+int mlx4_cq_modify(struct mlx4_dev *dev, struct mlx4_cq *cq,
+                   u16 count, u16 period);
+
 #endif /* MLX4_CQ_H */