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RDMA/nldev: Added configuration of RDMA dynamic interrupt moderation to netlink
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>
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f8fc8cd9c6
5 changed files with 30 additions and 0 deletions
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@ -7,6 +7,7 @@ menuconfig INFINIBAND
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depends on m || IPV6 != m
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depends on !ALPHA
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select IRQ_POLL
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select DIMLIB
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---help---
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Core support for InfiniBand (IB). Make sure to also select
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any protocols you wish to use as well as drivers for your
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@ -60,6 +60,7 @@ extern bool ib_devices_shared_netns;
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int ib_device_register_sysfs(struct ib_device *device);
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void ib_device_unregister_sysfs(struct ib_device *device);
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int ib_device_rename(struct ib_device *ibdev, const char *name);
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int ib_device_set_dim(struct ib_device *ibdev, u8 use_dim);
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typedef void (*roce_netdev_callback)(struct ib_device *device, u8 port,
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struct net_device *idev, void *cookie);
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@ -448,6 +448,15 @@ int ib_device_rename(struct ib_device *ibdev, const char *name)
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return 0;
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}
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int ib_device_set_dim(struct ib_device *ibdev, u8 use_dim)
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{
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if (use_dim > 1)
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return -EINVAL;
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ibdev->use_cq_dim = use_dim;
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return 0;
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}
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static int alloc_name(struct ib_device *ibdev, const char *name)
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{
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struct ib_device *device;
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@ -52,6 +52,7 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
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.len = RDMA_NLDEV_ATTR_EMPTY_STRING },
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[RDMA_NLDEV_ATTR_CHARDEV_TYPE] = { .type = NLA_NUL_STRING,
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.len = RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE },
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[RDMA_NLDEV_ATTR_DEV_DIM] = { .type = NLA_U8 },
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[RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 },
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[RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING,
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.len = IB_DEVICE_NAME_MAX },
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@ -252,6 +253,8 @@ static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
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return -EMSGSIZE;
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if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type))
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return -EMSGSIZE;
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if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, device->use_cq_dim))
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return -EMSGSIZE;
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/*
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* Link type is determined on first port and mlx4 device
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@ -552,6 +555,9 @@ static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
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nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))
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goto err;
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if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, (cq->dim != NULL)))
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goto err;
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if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQN, res->id))
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goto err;
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if (!rdma_is_kernel_res(res) &&
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@ -870,6 +876,14 @@ static int nldev_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
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goto put_done;
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}
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if (tb[RDMA_NLDEV_ATTR_DEV_DIM]) {
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u8 use_dim;
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use_dim = nla_get_u8(tb[RDMA_NLDEV_ATTR_DEV_DIM]);
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err = ib_device_set_dim(device, use_dim);
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goto done;
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}
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done:
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ib_device_put(device);
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put_done:
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@ -520,6 +520,11 @@ enum rdma_nldev_attr {
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RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME, /* string */
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RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE, /* u64 */
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/*
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* CQ adaptive moderatio (DIM)
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*/
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RDMA_NLDEV_ATTR_DEV_DIM, /* u8 */
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/*
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* Always the end
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*/
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