diff options
| author | Jiri Pirko <jiri@nvidia.com> | 2026-07-01 14:40:15 +0200 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2026-07-23 08:33:32 -0400 |
| commit | aac287f4f1ebebc85f36c0680bcf955ef9145c66 (patch) | |
| tree | 86ea33d6dc9272e80084bf150646c519f01505aa /drivers | |
| parent | 023349192e79cfb00ef9ad320549e4f6b6cf8309 (diff) | |
RDMA/mlx5: Use UMEM attribute for SRQ doorbell record
Add an optional mlx5 driver-namespace UMEM attribute on SRQ create so
userspace can supply the doorbell record umem explicitly, symmetric to
the CQ and QP sides. Resolve it inside mlx5_ib_db_map_user() and use it
as a private DBR page when present; otherwise take the existing UHW
share-or-pin path that preserves per-page DBR sharing across CQ/QP/SRQ
in the same process.
Add mlx5's first UVERBS_OBJECT_SRQ UAPI definition chain to attach the
new attr.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20260701124015.64350-4-jiri@resnulli.us
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 1 | ||||
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mlx5_ib.h | 1 | ||||
| -rw-r--r-- | drivers/infiniband/hw/mlx5/srq.c | 19 |
3 files changed, 20 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index d65ebdef2823..788f79f040b0 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -4476,6 +4476,7 @@ static const struct uapi_definition mlx5_ib_defs[] = { UAPI_DEF_CHAIN(mlx5_ib_dm_defs), UAPI_DEF_CHAIN(mlx5_ib_create_cq_defs), UAPI_DEF_CHAIN(mlx5_ib_create_qp_defs), + UAPI_DEF_CHAIN(mlx5_ib_create_srq_defs), UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_DEVICE, &mlx5_ib_query_context), UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_MR, &mlx5_ib_reg_dmabuf_mr), diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 522984d958bb..e9ddf2e97a76 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -1517,6 +1517,7 @@ extern const struct uapi_definition mlx5_ib_qos_defs[]; extern const struct uapi_definition mlx5_ib_std_types_defs[]; extern const struct uapi_definition mlx5_ib_create_cq_defs[]; extern const struct uapi_definition mlx5_ib_create_qp_defs[]; +extern const struct uapi_definition mlx5_ib_create_srq_defs[]; static inline int is_qp1(enum ib_qp_type qp_type) { diff --git a/drivers/infiniband/hw/mlx5/srq.c b/drivers/infiniband/hw/mlx5/srq.c index 6fa4c5a9a0d5..a973c1b7515f 100644 --- a/drivers/infiniband/hw/mlx5/srq.c +++ b/drivers/infiniband/hw/mlx5/srq.c @@ -10,6 +10,9 @@ #include "mlx5_ib.h" #include "srq.h" +#define UVERBS_MODULE_NAME mlx5_ib +#include <rdma/uverbs_named_ioctl.h> + static void *get_wqe(struct mlx5_ib_srq *srq, int n) { return mlx5_frag_buf_get_wqe(&srq->fbc, n); @@ -78,7 +81,9 @@ static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq, } in->umem = srq->umem; - err = mlx5_ib_db_map_user(ucontext, NULL, 0, ucmd.db_addr, &srq->db); + err = mlx5_ib_db_map_user(ucontext, attrs, + MLX5_IB_ATTR_CREATE_SRQ_DBR_BUF_UMEM, + ucmd.db_addr, &srq->db); if (err) { mlx5_ib_dbg(dev, "map doorbell failed\n"); goto err_umem; @@ -466,3 +471,15 @@ out: return err; } + +ADD_UVERBS_ATTRIBUTES_SIMPLE( + mlx5_ib_srq_create, + UVERBS_OBJECT_SRQ, + UVERBS_METHOD_SRQ_CREATE, + UVERBS_ATTR_UMEM(MLX5_IB_ATTR_CREATE_SRQ_DBR_BUF_UMEM, + UA_OPTIONAL)); + +const struct uapi_definition mlx5_ib_create_srq_defs[] = { + UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_SRQ, &mlx5_ib_srq_create), + {}, +}; |