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From: Leon Romanovsky <leon@kernel.org>
To: Doug Ledford <dledford@redhat.com>, Jason Gunthorpe <jgg@mellanox.com>
Cc: Yishai Hadas <yishaih@mellanox.com>, linux-rdma@vger.kernel.org
Subject: [PATCH rdma-next v1 3/7] IB/uverbs: Expose UAPI to query ucontext
Date: Tue, 30 Jun 2020 12:39:12 +0300	[thread overview]
Message-ID: <20200630093916.332097-4-leon@kernel.org> (raw)
In-Reply-To: <20200630093916.332097-1-leon@kernel.org>

From: Yishai Hadas <yishaih@mellanox.com>

Expose UAPI to query ucontext, this will let user space application that
didn't allocate the ucontext but has access to by owning the matching
command FD to retrieve the ucontext information.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/core/device.c              |  1 +
 .../infiniband/core/uverbs_std_types_device.c | 41 ++++++++++++++++++-
 include/rdma/ib_verbs.h                       |  4 ++
 include/uapi/rdma/ib_user_ioctl_cmds.h        |  6 +++
 4 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 1335ed1f1e4a..1da1b0731f25 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2669,6 +2669,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
 	SET_DEVICE_OP(dev_ops, query_port);
 	SET_DEVICE_OP(dev_ops, query_qp);
 	SET_DEVICE_OP(dev_ops, query_srq);
+	SET_DEVICE_OP(dev_ops, query_ucontext);
 	SET_DEVICE_OP(dev_ops, rdma_netdev_get_params);
 	SET_DEVICE_OP(dev_ops, read_counters);
 	SET_DEVICE_OP(dev_ops, reg_dm_mr);
diff --git a/drivers/infiniband/core/uverbs_std_types_device.c b/drivers/infiniband/core/uverbs_std_types_device.c
index ae4a59d6f9b1..8e58605a17be 100644
--- a/drivers/infiniband/core/uverbs_std_types_device.c
+++ b/drivers/infiniband/core/uverbs_std_types_device.c
@@ -229,6 +229,37 @@ static int UVERBS_HANDLER(UVERBS_METHOD_GET_CONTEXT)(
 	return 0;
 }

+static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_CONTEXT)(
+	struct uverbs_attr_bundle *attrs)
+{
+	u64 core_support = IB_UVERBS_CORE_SUPPORT_OPTIONAL_MR_ACCESS;
+	struct ib_ucontext *ucontext;
+	struct ib_device *ib_dev;
+	u32 num_comp;
+	int ret;
+
+	ucontext = ib_uverbs_get_ucontext(attrs);
+	if (IS_ERR(ucontext))
+		return PTR_ERR(ucontext);
+	ib_dev = ucontext->device;
+
+	if (!ib_dev->ops.query_ucontext)
+		return -EOPNOTSUPP;
+
+	num_comp = attrs->ufile->device->num_comp_vectors;
+	ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS,
+			     &num_comp, sizeof(num_comp));
+	if (IS_UVERBS_COPY_ERR(ret))
+		return ret;
+
+	ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT,
+			     &core_support, sizeof(core_support));
+	if (IS_UVERBS_COPY_ERR(ret))
+		return ret;
+
+	return ucontext->device->ops.query_ucontext(ucontext, attrs);
+}
+
 DECLARE_UVERBS_NAMED_METHOD(
 	UVERBS_METHOD_GET_CONTEXT,
 	UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,
@@ -237,6 +268,13 @@ DECLARE_UVERBS_NAMED_METHOD(
 			    UVERBS_ATTR_TYPE(u64), UA_OPTIONAL),
 	UVERBS_ATTR_UHW());

+DECLARE_UVERBS_NAMED_METHOD(
+	UVERBS_METHOD_QUERY_CONTEXT,
+	UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS,
+			    UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),
+	UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT,
+			    UVERBS_ATTR_TYPE(u64), UA_OPTIONAL));
+
 DECLARE_UVERBS_NAMED_METHOD(
 	UVERBS_METHOD_INFO_HANDLES,
 	/* Also includes any device specific object ids */
@@ -260,7 +298,8 @@ DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE,
 			      &UVERBS_METHOD(UVERBS_METHOD_GET_CONTEXT),
 			      &UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE),
 			      &UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES),
-			      &UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT));
+			      &UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT),
+			      &UVERBS_METHOD(UVERBS_METHOD_QUERY_CONTEXT));

 const struct uapi_definition uverbs_def_obj_device[] = {
 	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE),
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 70f1c130d916..83de514ad485 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2646,6 +2646,10 @@ struct ib_device_ops {
 	 */
 	int (*fill_stat_mr_entry)(struct sk_buff *msg, struct ib_mr *ibmr);

+	/* query driver for its ucontext properties */
+	int (*query_ucontext)(struct ib_ucontext *context,
+			      struct uverbs_attr_bundle *attrs);
+
 	DECLARE_RDMA_OBJ_SIZE(ib_ah);
 	DECLARE_RDMA_OBJ_SIZE(ib_cq);
 	DECLARE_RDMA_OBJ_SIZE(ib_pd);
diff --git a/include/uapi/rdma/ib_user_ioctl_cmds.h b/include/uapi/rdma/ib_user_ioctl_cmds.h
index 4961d5e858eb..83b6e71ea216 100644
--- a/include/uapi/rdma/ib_user_ioctl_cmds.h
+++ b/include/uapi/rdma/ib_user_ioctl_cmds.h
@@ -69,6 +69,7 @@ enum uverbs_methods_device {
 	UVERBS_METHOD_INFO_HANDLES,
 	UVERBS_METHOD_QUERY_PORT,
 	UVERBS_METHOD_GET_CONTEXT,
+	UVERBS_METHOD_QUERY_CONTEXT,
 };

 enum uverbs_attrs_invoke_write_cmd_attr_ids {
@@ -87,6 +88,11 @@ enum uverbs_attrs_get_context_attr_ids {
 	UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,
 };

+enum uverbs_attrs_query_context_attr_ids {
+	UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS,
+	UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT,
+};
+
 enum uverbs_attrs_create_cq_cmd_attr_ids {
 	UVERBS_ATTR_CREATE_CQ_HANDLE,
 	UVERBS_ATTR_CREATE_CQ_CQE,
--
2.26.2


  parent reply	other threads:[~2020-06-30  9:39 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-30  9:39 [PATCH rdma-next v1 0/7] Introduce UAPIs to query UCONTEXT, PD and MR properties Leon Romanovsky
2020-06-30  9:39 ` [PATCH rdma-next v1 1/7] IB/uverbs: Enable CQ ioctl commands by default Leon Romanovsky
2020-06-30  9:39 ` [PATCH rdma-next v1 2/7] IB/uverbs: Set IOVA on IB MR in uverbs layer Leon Romanovsky
2020-06-30  9:39 ` Leon Romanovsky [this message]
2020-06-30  9:39 ` [PATCH rdma-next v1 4/7] RDMA/mlx5: Refactor mlx5_ib_alloc_ucontext() response Leon Romanovsky
2020-06-30  9:39 ` [PATCH rdma-next v1 5/7] RDMA/mlx5: Implement the query ucontext functionality Leon Romanovsky
2020-06-30  9:39 ` [PATCH rdma-next v1 6/7] RDMA/mlx5: Introduce UAPI to query PD attributes Leon Romanovsky
2020-06-30  9:39 ` [PATCH rdma-next v1 7/7] IB/uverbs: Expose UAPI to query MR Leon Romanovsky
2020-07-06 22:54 ` [PATCH rdma-next v1 0/7] Introduce UAPIs to query UCONTEXT, PD and MR properties Jason Gunthorpe

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