From ef1659ade3590e4a29a999c6f0cb2272857638a6 Mon Sep 17 00:00:00 2001 From: Yishai Hadas Date: Sun, 30 Jun 2019 19:23:33 +0300 Subject: [PATCH] IB/mlx5: Add DEVX support for CQ events Add DEVX support for CQ events by creating and destroying the CQ via mlx5_core and set an handler to manage its completions. Signed-off-by: Yishai Hadas Signed-off-by: Leon Romanovsky Reviewed-by: Jason Gunthorpe Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mlx5/devx.c | 39 +++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c index 867b9778c063..b6cae4ea7a37 100644 --- a/drivers/infiniband/hw/mlx5/devx.c +++ b/drivers/infiniband/hw/mlx5/devx.c @@ -19,9 +19,12 @@ #define UVERBS_MODULE_NAME mlx5_ib #include +static void dispatch_event_fd(struct list_head *fd_list, const void *data); + enum devx_obj_flags { DEVX_OBJ_FLAGS_INDIRECT_MKEY = 1 << 0, DEVX_OBJ_FLAGS_DCT = 1 << 1, + DEVX_OBJ_FLAGS_CQ = 1 << 2, }; struct devx_async_data { @@ -89,6 +92,7 @@ struct devx_async_event_file { #define MLX5_MAX_DESTROY_INBOX_SIZE_DW MLX5_ST_SZ_DW(delete_fte_in) struct devx_obj { struct mlx5_core_dev *mdev; + struct mlx5_ib_dev *ib_dev; u64 obj_id; u32 dinlen; /* destroy inbox length */ u32 dinbox[MLX5_MAX_DESTROY_INBOX_SIZE_DW]; @@ -96,6 +100,7 @@ struct devx_obj { union { struct mlx5_ib_devx_mr devx_mr; struct mlx5_core_dct core_dct; + struct mlx5_core_cq core_cq; }; struct list_head event_sub; /* holds devx_event_subscription entries */ }; @@ -1336,6 +1341,8 @@ static int devx_obj_cleanup(struct ib_uobject *uobject, if (obj->flags & DEVX_OBJ_FLAGS_DCT) ret = mlx5_core_destroy_dct(obj->mdev, &obj->core_dct); + else if (obj->flags & DEVX_OBJ_FLAGS_CQ) + ret = mlx5_core_destroy_cq(obj->mdev, &obj->core_cq); else ret = mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out)); @@ -1359,6 +1366,29 @@ static int devx_obj_cleanup(struct ib_uobject *uobject, return ret; } +static void devx_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe) +{ + struct devx_obj *obj = container_of(mcq, struct devx_obj, core_cq); + struct mlx5_devx_event_table *table; + struct devx_event *event; + struct devx_obj_event *obj_event; + u32 obj_id = mcq->cqn; + + table = &obj->ib_dev->devx_event_table; + rcu_read_lock(); + event = xa_load(&table->event_xa, MLX5_EVENT_TYPE_COMP); + if (!event) + goto out; + + obj_event = xa_load(&event->object_ids, obj_id); + if (!obj_event) + goto out; + + dispatch_event_fd(&obj_event->obj_sub_list, eqe); +out: + rcu_read_unlock(); +} + static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)( struct uverbs_attr_bundle *attrs) { @@ -1410,6 +1440,12 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)( err = mlx5_core_create_dct(dev->mdev, &obj->core_dct, cmd_in, cmd_in_len, cmd_out, cmd_out_len); + } else if (opcode == MLX5_CMD_OP_CREATE_CQ) { + obj->flags |= DEVX_OBJ_FLAGS_CQ; + obj->core_cq.comp = devx_cq_comp; + err = mlx5_core_create_cq(dev->mdev, &obj->core_cq, + cmd_in, cmd_in_len, cmd_out, + cmd_out_len); } else { err = mlx5_cmd_exec(dev->mdev, cmd_in, cmd_in_len, @@ -1422,6 +1458,7 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)( uobj->object = obj; obj->mdev = dev->mdev; INIT_LIST_HEAD(&obj->event_sub); + obj->ib_dev = dev; devx_obj_build_destroy_cmd(cmd_in, cmd_out, obj->dinbox, &obj->dinlen, &obj_id); WARN_ON(obj->dinlen > MLX5_MAX_DESTROY_INBOX_SIZE_DW * sizeof(u32)); @@ -1449,6 +1486,8 @@ err_copy: obj_destroy: if (obj->flags & DEVX_OBJ_FLAGS_DCT) mlx5_core_destroy_dct(obj->mdev, &obj->core_dct); + else if (obj->flags & DEVX_OBJ_FLAGS_CQ) + mlx5_core_destroy_cq(obj->mdev, &obj->core_cq); else mlx5_cmd_exec(obj->mdev, obj->dinbox, obj->dinlen, out, sizeof(out)); -- 2.30.2