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Thu, 11 Jun 2026 08:12:48 -0700 (PDT) Received: from localhost ([140.209.217.212]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4601f2ed944sm84321615f8f.13.2026.06.11.08.12.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Jun 2026 08:12:48 -0700 (PDT) From: Jiri Pirko To: linux-rdma@vger.kernel.org Cc: jgg@ziepe.ca, leon@kernel.org, mrgolin@amazon.com, sfual@cse.ust.hk Subject: [PATCH rdma-next 5/6] RDMA/uverbs: Add CQ resize buffer UMEM attribute Date: Thu, 11 Jun 2026 17:12:28 +0200 Message-ID: <20260611151229.879514-6-jiri@resnulli.us> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260611151229.879514-1-jiri@resnulli.us> References: <20260611151229.879514-1-jiri@resnulli.us> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jiri Pirko Add an optional UMEM attribute to the CQ resize method that backs the resized CQ buffer, so userspace can supply it as either a VA or a dma-buf through a single descriptor, consistent with the CQ and QP create methods. mlx5 is the only driver that pins a resized CQ buffer via umem; it maps a single ucmd->buf_addr region through this attribute. Signed-off-by: Jiri Pirko --- drivers/infiniband/core/uverbs_std_types_cq.c | 2 ++ include/uapi/rdma/ib_user_ioctl_cmds.h | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/infiniband/core/uverbs_std_types_cq.c b/drivers/infiniband/core/uverbs_std_types_cq.c index 43530e55f128..62af4f64b7ad 100644 --- a/drivers/infiniband/core/uverbs_std_types_cq.c +++ b/drivers/infiniband/core/uverbs_std_types_cq.c @@ -269,6 +269,8 @@ DECLARE_UVERBS_NAMED_METHOD( UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_RESIZE_CQ_RESP_CQE, UVERBS_ATTR_TYPE(u32), UA_MANDATORY), + UVERBS_ATTR_UMEM(UVERBS_ATTR_RESIZE_CQ_BUF_UMEM, + UA_OPTIONAL), UVERBS_ATTR_UHW()); DECLARE_UVERBS_NAMED_OBJECT( diff --git a/include/uapi/rdma/ib_user_ioctl_cmds.h b/include/uapi/rdma/ib_user_ioctl_cmds.h index 5d2451a03a83..7cab5daefe63 100644 --- a/include/uapi/rdma/ib_user_ioctl_cmds.h +++ b/include/uapi/rdma/ib_user_ioctl_cmds.h @@ -129,6 +129,7 @@ enum uverbs_attrs_resize_cq_cmd_attr_ids { UVERBS_ATTR_RESIZE_CQ_HANDLE, UVERBS_ATTR_RESIZE_CQ_CQE, UVERBS_ATTR_RESIZE_CQ_RESP_CQE, + UVERBS_ATTR_RESIZE_CQ_BUF_UMEM, }; enum uverbs_attrs_create_flow_action_esp { -- 2.54.0