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IB/core: Add query_port_speed verb

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Add new ibv_query_port_speed() verb to enable applications to query
the effective bandwidth of a port.

This verb is particularly useful when the speed is not a multiplication
of IB speed and width where width is 2^n.

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Edward Srouji <edwards@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Or Har-Toov 2025-12-18 17:58:46 +02:00 • committed by Leon Romanovsky
parent d4adeff26c
commit 51a07ce2fe
4 changed files with 51 additions and 0 deletions
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1
drivers/infiniband/core/device.c
View file

@ -2816,6 +2816,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
SET_DEVICE_OP(dev_ops, query_gid);
SET_DEVICE_OP(dev_ops, query_pkey);
SET_DEVICE_OP(dev_ops, query_port);
SET_DEVICE_OP(dev_ops, query_port_speed);
SET_DEVICE_OP(dev_ops, query_qp);
SET_DEVICE_OP(dev_ops, query_srq);
SET_DEVICE_OP(dev_ops, query_ucontext);

42
drivers/infiniband/core/uverbs_std_types_device.c
View file

@ -209,6 +209,39 @@ static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_PORT)(
&resp, sizeof(resp));
}
static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_PORT_SPEED)(
struct uverbs_attr_bundle *attrs)
{
struct ib_ucontext *ucontext;
struct ib_device *ib_dev;
u32 port_num;
u64 speed;
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_port_speed)
return -EOPNOTSUPP;
ret = uverbs_get_const(&port_num, attrs,
UVERBS_ATTR_QUERY_PORT_SPEED_PORT_NUM);
if (ret)
return ret;
if (!rdma_is_port_valid(ib_dev, port_num))
return -EINVAL;
ret = ib_dev->ops.query_port_speed(ib_dev, port_num, &speed);
if (ret)
return ret;
return uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_PORT_SPEED_RESP,
&speed, sizeof(speed));
}
static int UVERBS_HANDLER(UVERBS_METHOD_GET_CONTEXT)(
struct uverbs_attr_bundle *attrs)
{
@ -469,6 +502,14 @@ DECLARE_UVERBS_NAMED_METHOD(
active_speed_ex),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_QUERY_PORT_SPEED,
UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_PORT_SPEED_PORT_NUM, u32,
UA_MANDATORY),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_PORT_SPEED_RESP,
UVERBS_ATTR_TYPE(u64),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_QUERY_GID_TABLE,
UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_GID_TABLE_ENTRY_SIZE, u64,
@ -498,6 +539,7 @@ DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE,
&UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE),
&UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT_SPEED),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_CONTEXT),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_GID_TABLE),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_GID_ENTRY));

2
include/rdma/ib_verbs.h
View file

@ -2418,6 +2418,8 @@ struct ib_device_ops {
int comp_vector);
int (*query_port)(struct ib_device *device, u32 port_num,
struct ib_port_attr *port_attr);
int (*query_port_speed)(struct ib_device *device, u32 port_num,
u64 *speed);
int (*modify_port)(struct ib_device *device, u32 port_num,
int port_modify_mask,
struct ib_port_modify *port_modify);

6
include/uapi/rdma/ib_user_ioctl_cmds.h
View file

@ -73,6 +73,7 @@ enum uverbs_methods_device {
UVERBS_METHOD_QUERY_CONTEXT,
UVERBS_METHOD_QUERY_GID_TABLE,
UVERBS_METHOD_QUERY_GID_ENTRY,
UVERBS_METHOD_QUERY_PORT_SPEED,
};
enum uverbs_attrs_invoke_write_cmd_attr_ids {
@ -86,6 +87,11 @@ enum uverbs_attrs_query_port_cmd_attr_ids {
UVERBS_ATTR_QUERY_PORT_RESP,
};
enum uverbs_attrs_query_port_speed_cmd_attr_ids {
UVERBS_ATTR_QUERY_PORT_SPEED_PORT_NUM,
UVERBS_ATTR_QUERY_PORT_SPEED_RESP,
};
enum uverbs_attrs_get_context_attr_ids {
UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,
UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,