[PATCH rdma-next 0/2] RDMA: Clarify that CQ resize is a user-space verb

[PATCH rdma-next 0/2] RDMA: Clarify that CQ resize is a user-space verb

[Leon Romanovsky]

Let's start to clean resize CQ path.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
Leon Romanovsky (2):
      RDMA/core: Remove unused ib_resize_cq() implementation
      RDMA: Clarify that CQ resize is a user‑space verb

 drivers/infiniband/core/device.c             |  2 +-
 drivers/infiniband/core/uverbs_cmd.c         |  4 ++--
 drivers/infiniband/core/verbs.c              | 10 ----------
 drivers/infiniband/hw/bnxt_re/main.c         |  2 +-
 drivers/infiniband/hw/irdma/verbs.c          |  2 +-
 drivers/infiniband/hw/mlx4/main.c            |  2 +-
 drivers/infiniband/hw/mlx5/main.c            |  2 +-
 drivers/infiniband/hw/mthca/mthca_provider.c |  2 +-
 drivers/infiniband/hw/ocrdma/ocrdma_main.c   |  2 +-
 drivers/infiniband/sw/rdmavt/vt.c            |  2 +-
 drivers/infiniband/sw/rxe/rxe_verbs.c        |  2 +-
 include/rdma/ib_verbs.h                      | 12 ++----------
 12 files changed, 13 insertions(+), 31 deletions(-)
---
base-commit: 5122be2a19aa0fc512ea689fd1064f7e05b45d17
change-id: 20260318-resize_cq-type-a6208c447068

Best regards,
--  
Leon Romanovsky <leonro@nvidia.com>

[PATCH rdma-next 1/2] RDMA/core: Remove unused ib_resize_cq() implementation

[Leon Romanovsky]

From: Leon Romanovsky <leonro@nvidia.com>

There are no in-kernel users of the CQ resize functionality, so drop it.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/infiniband/core/verbs.c | 10 ----------
 include/rdma/ib_verbs.h         |  9 ---------
 2 files changed, 19 deletions(-)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 721cd43212380..bac87de9cc673 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2264,16 +2264,6 @@ int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)
 }
 EXPORT_SYMBOL(ib_destroy_cq_user);
 
-int ib_resize_cq(struct ib_cq *cq, int cqe)
-{
-	if (cq->shared)
-		return -EOPNOTSUPP;
-
-	return cq->device->ops.resize_cq ?
-		cq->device->ops.resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
-}
-EXPORT_SYMBOL(ib_resize_cq);
-
 /* Memory regions */
 
 struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 57b81ca0fabdc..37260d37144c5 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4103,15 +4103,6 @@ struct ib_cq *__ib_create_cq(struct ib_device *device,
 #define ib_create_cq(device, cmp_hndlr, evt_hndlr, cq_ctxt, cq_attr) \
 	__ib_create_cq((device), (cmp_hndlr), (evt_hndlr), (cq_ctxt), (cq_attr), KBUILD_MODNAME)
 
-/**
- * ib_resize_cq - Modifies the capacity of the CQ.
- * @cq: The CQ to resize.
- * @cqe: The minimum size of the CQ.
- *
- * Users can examine the cq structure to determine the actual CQ size.
- */
-int ib_resize_cq(struct ib_cq *cq, int cqe);
-
 /**
  * rdma_set_cq_moderation - Modifies moderation params of the CQ
  * @cq: The CQ to modify.

-- 
2.53.0

[PATCH rdma-next 2/2] RDMA: Clarify that CQ resize is a user‑space verb

[Leon Romanovsky]

From: Leon Romanovsky <leonro@nvidia.com>

The CQ resize operation is used only by uverbs. Make this explicit.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/infiniband/core/device.c             | 2 +-
 drivers/infiniband/core/uverbs_cmd.c         | 4 ++--
 drivers/infiniband/hw/bnxt_re/main.c         | 2 +-
 drivers/infiniband/hw/irdma/verbs.c          | 2 +-
 drivers/infiniband/hw/mlx4/main.c            | 2 +-
 drivers/infiniband/hw/mlx5/main.c            | 2 +-
 drivers/infiniband/hw/mthca/mthca_provider.c | 2 +-
 drivers/infiniband/hw/ocrdma/ocrdma_main.c   | 2 +-
 drivers/infiniband/sw/rdmavt/vt.c            | 2 +-
 drivers/infiniband/sw/rxe/rxe_verbs.c        | 2 +-
 include/rdma/ib_verbs.h                      | 3 ++-
 11 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 236061a33bf67..4c174f7f1070c 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2832,7 +2832,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
 	SET_DEVICE_OP(dev_ops, reg_user_mr_dmabuf);
 	SET_DEVICE_OP(dev_ops, req_notify_cq);
 	SET_DEVICE_OP(dev_ops, rereg_user_mr);
-	SET_DEVICE_OP(dev_ops, resize_cq);
+	SET_DEVICE_OP(dev_ops, resize_user_cq);
 	SET_DEVICE_OP(dev_ops, set_vf_guid);
 	SET_DEVICE_OP(dev_ops, set_vf_link_state);
 	SET_DEVICE_OP(dev_ops, ufile_hw_cleanup);
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index f31650ef7bc34..25741db2c8f64 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1142,7 +1142,7 @@ static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
 	if (IS_ERR(cq))
 		return PTR_ERR(cq);
 
-	ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
+	ret = cq->device->ops.resize_user_cq(cq, cmd.cqe, &attrs->driver_udata);
 	if (ret)
 		goto out;
 
@@ -3801,7 +3801,7 @@ const struct uapi_definition uverbs_def_write_intf[] = {
 				     UAPI_DEF_WRITE_UDATA_IO(
 					     struct ib_uverbs_resize_cq,
 					     struct ib_uverbs_resize_cq_resp),
-				     UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
+				     UAPI_DEF_METHOD_NEEDS_FN(resize_user_cq)),
 		DECLARE_UVERBS_WRITE_EX(
 			IB_USER_VERBS_EX_CMD_CREATE_CQ,
 			ib_uverbs_ex_create_cq,
diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index 13ad63b9b1de7..0578114730b0e 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -1374,7 +1374,7 @@ static const struct ib_device_ops bnxt_re_dev_ops = {
 	.reg_user_mr = bnxt_re_reg_user_mr,
 	.reg_user_mr_dmabuf = bnxt_re_reg_user_mr_dmabuf,
 	.req_notify_cq = bnxt_re_req_notify_cq,
-	.resize_cq = bnxt_re_resize_cq,
+	.resize_user_cq = bnxt_re_resize_cq,
 	.create_flow = bnxt_re_create_flow,
 	.destroy_flow = bnxt_re_destroy_flow,
 	INIT_RDMA_OBJ_SIZE(ib_ah, bnxt_re_ah, ib_ah),
diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index 1d0c2d8453a8a..740a770199f7f 100644
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -5461,7 +5461,7 @@ static const struct ib_device_ops irdma_dev_ops = {
 	.reg_user_mr_dmabuf = irdma_reg_user_mr_dmabuf,
 	.rereg_user_mr = irdma_rereg_user_mr,
 	.req_notify_cq = irdma_req_notify_cq,
-	.resize_cq = irdma_resize_cq,
+	.resize_user_cq = irdma_resize_cq,
 	INIT_RDMA_OBJ_SIZE(ib_pd, irdma_pd, ibpd),
 	INIT_RDMA_OBJ_SIZE(ib_ucontext, irdma_ucontext, ibucontext),
 	INIT_RDMA_OBJ_SIZE(ib_ah, irdma_ah, ibah),
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 73e17b4339eb6..900637e4db0ed 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -2568,7 +2568,7 @@ static const struct ib_device_ops mlx4_ib_dev_ops = {
 	.reg_user_mr = mlx4_ib_reg_user_mr,
 	.req_notify_cq = mlx4_ib_arm_cq,
 	.rereg_user_mr = mlx4_ib_rereg_user_mr,
-	.resize_cq = mlx4_ib_resize_cq,
+	.resize_user_cq = mlx4_ib_resize_cq,
 	.report_port_event = mlx4_ib_port_event,
 
 	INIT_RDMA_OBJ_SIZE(ib_ah, mlx4_ib_ah, ibah),
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index ff2c02c85625c..b74bf26976550 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -4612,7 +4612,7 @@ static const struct ib_device_ops mlx5_ib_dev_ops = {
 	.reg_user_mr_dmabuf = mlx5_ib_reg_user_mr_dmabuf,
 	.req_notify_cq = mlx5_ib_arm_cq,
 	.rereg_user_mr = mlx5_ib_rereg_user_mr,
-	.resize_cq = mlx5_ib_resize_cq,
+	.resize_user_cq = mlx5_ib_resize_cq,
 	.ufile_hw_cleanup = mlx5_ib_ufile_hw_cleanup,
 
 	INIT_RDMA_OBJ_SIZE(ib_ah, mlx5_ib_ah, ibah),
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 6a0795332616d..d81806ef12e53 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -1096,7 +1096,7 @@ static const struct ib_device_ops mthca_dev_ops = {
 	.query_port = mthca_query_port,
 	.query_qp = mthca_query_qp,
 	.reg_user_mr = mthca_reg_user_mr,
-	.resize_cq = mthca_resize_cq,
+	.resize_user_cq = mthca_resize_cq,
 
 	INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah),
 	INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq),
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
index b62a9bf160c52..a448748472082 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_main.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
@@ -166,7 +166,7 @@ static const struct ib_device_ops ocrdma_dev_ops = {
 	.query_qp = ocrdma_query_qp,
 	.reg_user_mr = ocrdma_reg_user_mr,
 	.req_notify_cq = ocrdma_arm_cq,
-	.resize_cq = ocrdma_resize_cq,
+	.resize_user_cq = ocrdma_resize_cq,
 
 	INIT_RDMA_OBJ_SIZE(ib_ah, ocrdma_ah, ibah),
 	INIT_RDMA_OBJ_SIZE(ib_cq, ocrdma_cq, ibcq),
diff --git a/drivers/infiniband/sw/rdmavt/vt.c b/drivers/infiniband/sw/rdmavt/vt.c
index 033d8932aff16..40aa642083647 100644
--- a/drivers/infiniband/sw/rdmavt/vt.c
+++ b/drivers/infiniband/sw/rdmavt/vt.c
@@ -375,7 +375,7 @@ static const struct ib_device_ops rvt_dev_ops = {
 	.query_srq = rvt_query_srq,
 	.reg_user_mr = rvt_reg_user_mr,
 	.req_notify_cq = rvt_req_notify_cq,
-	.resize_cq = rvt_resize_cq,
+	.resize_user_cq = rvt_resize_cq,
 
 	INIT_RDMA_OBJ_SIZE(ib_ah, rvt_ah, ibah),
 	INIT_RDMA_OBJ_SIZE(ib_cq, rvt_cq, ibcq),
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index fe41362c51444..2be4fd68276dc 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -1519,7 +1519,7 @@ static const struct ib_device_ops rxe_dev_ops = {
 	.reg_user_mr = rxe_reg_user_mr,
 	.req_notify_cq = rxe_req_notify_cq,
 	.rereg_user_mr = rxe_rereg_user_mr,
-	.resize_cq = rxe_resize_cq,
+	.resize_user_cq = rxe_resize_cq,
 
 	INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah),
 	INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq),
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 37260d37144c5..e53c6ed66f34a 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2634,7 +2634,8 @@ struct ib_device_ops {
 			      struct uverbs_attr_bundle *attrs);
 	int (*modify_cq)(struct ib_cq *cq, u16 cq_count, u16 cq_period);
 	int (*destroy_cq)(struct ib_cq *cq, struct ib_udata *udata);
-	int (*resize_cq)(struct ib_cq *cq, int cqe, struct ib_udata *udata);
+	int (*resize_user_cq)(struct ib_cq *cq, int cqe,
+			      struct ib_udata *udata);
 	/*
 	 * pre_destroy_cq - Prevent a cq from generating any new work
 	 * completions, but not free any kernel resources

-- 
2.53.0

Re: [PATCH rdma-next 0/2] RDMA: Clarify that CQ resize is a user-space verb

[Leon Romanovsky]

On Wed, 18 Mar 2026 12:02:35 +0200, Leon Romanovsky wrote:
> Let's start to clean resize CQ path.

Applied, thanks!

[1/2] RDMA/core: Remove unused ib_resize_cq() implementation
      https://git.kernel.org/rdma/rdma/c/137b01dd466fa4
[2/2] RDMA: Clarify that CQ resize is a user‑space verb
      https://git.kernel.org/rdma/rdma/c/90b7abe25ce9b8

Best regards,
-- 
Leon Romanovsky <leon@kernel.org>