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RDMA/nldev: Added configuration of RDMA dynamic interrupt moderation to netlink

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Added parameter in ib_device for enabling dynamic interrupt moderation so
that it can be configured in userspace using rdma tool.

In order to set adaptive-moderation for an ib device the command is:
rdma dev set [DEV] adaptive-moderation [on|off]
Please set on/off.

rdma dev show
0: mlx5_0: node_type ca fw 16.26.0055 node_guid 248a:0703:00a5:29d0
sys_image_guid 248a:0703:00a5:29d0 adaptive-moderation on

rdma resource show cq
dev mlx5_0 cqn 0 cqe 1023 users 4 poll-ctx UNBOUND_WORKQUEUE
adaptive-moderation off comm [ib_core]

Signed-off-by: Yamin Friedman <yaminf@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Yamin Friedman 2019-07-08 13:59:04 +03:00 committed by Jason Gunthorpe
parent da6629793a
commit f8fc8cd9c6
5 changed files with 30 additions and 0 deletions
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1
drivers/infiniband/Kconfig
View file

@ -7,6 +7,7 @@ menuconfig INFINIBAND
depends on m || IPV6 != m
depends on !ALPHA
select IRQ_POLL
select DIMLIB
---help---
Core support for InfiniBand (IB). Make sure to also select
any protocols you wish to use as well as drivers for your

1
drivers/infiniband/core/core_priv.h
View file

@ -60,6 +60,7 @@ extern bool ib_devices_shared_netns;
int ib_device_register_sysfs(struct ib_device *device);
void ib_device_unregister_sysfs(struct ib_device *device);
int ib_device_rename(struct ib_device *ibdev, const char *name);
int ib_device_set_dim(struct ib_device *ibdev, u8 use_dim);
typedef void (*roce_netdev_callback)(struct ib_device *device, u8 port,
struct net_device *idev, void *cookie);

9
drivers/infiniband/core/device.c
View file

@ -448,6 +448,15 @@ int ib_device_rename(struct ib_device *ibdev, const char *name)
return 0;
}
int ib_device_set_dim(struct ib_device *ibdev, u8 use_dim)
{
if (use_dim > 1)
return -EINVAL;
ibdev->use_cq_dim = use_dim;
return 0;
}
static int alloc_name(struct ib_device *ibdev, const char *name)
{
struct ib_device *device;

14
drivers/infiniband/core/nldev.c
View file

@ -52,6 +52,7 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
.len = RDMA_NLDEV_ATTR_EMPTY_STRING },
[RDMA_NLDEV_ATTR_CHARDEV_TYPE] = { .type = NLA_NUL_STRING,
.len = RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE },
[RDMA_NLDEV_ATTR_DEV_DIM] = { .type = NLA_U8 },
[RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING,
.len = IB_DEVICE_NAME_MAX },
@ -252,6 +253,8 @@ static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
return -EMSGSIZE;
if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type))
return -EMSGSIZE;
if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, device->use_cq_dim))
return -EMSGSIZE;
/*
* Link type is determined on first port and mlx4 device
@ -552,6 +555,9 @@ static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))
goto err;
if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, (cq->dim != NULL)))
goto err;
if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQN, res->id))
goto err;
if (!rdma_is_kernel_res(res) &&
@ -870,6 +876,14 @@ static int nldev_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
goto put_done;
}
if (tb[RDMA_NLDEV_ATTR_DEV_DIM]) {
u8 use_dim;
use_dim = nla_get_u8(tb[RDMA_NLDEV_ATTR_DEV_DIM]);
err = ib_device_set_dim(device, use_dim);
goto done;
}
done:
ib_device_put(device);
put_done:

5
include/uapi/rdma/rdma_netlink.h
View file

@ -520,6 +520,11 @@ enum rdma_nldev_attr {
RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME, /* string */
RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE, /* u64 */
/*
* CQ adaptive moderatio (DIM)
*/
RDMA_NLDEV_ATTR_DEV_DIM, /* u8 */
/*
* Always the end
*/