RE: [PATCH v2 13/17] IB/Verbs: Reform cma/ucma with management helpers

From: Hefty, Sean
Date: Tue Apr 07 2015 - 17:36:51 EST

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In reply to: Steve Wise: "RE: [PATCH v2 13/17] IB/Verbs: Reform cma/ucma with management helpers"
Next in thread: Michael Wang: "[PATCH v2 14/17] IB/Verbs: Reserve legacy transport type for 'struct rdma_dev_addr'"
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> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
> index d8a8ea7..c23f483 100644
> --- a/drivers/infiniband/core/cma.c
> +++ b/drivers/infiniband/core/cma.c
> @@ -435,10 +435,10 @@ static int cma_resolve_ib_dev(struct rdma_id_private
> *id_priv)
> pkey = ntohs(addr->sib_pkey);
>
> list_for_each_entry(cur_dev, &dev_list, list) {
> - if (rdma_node_get_transport(cur_dev->device->node_type) !=
> RDMA_TRANSPORT_IB)
> - continue;
> -
> for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
> + if (!rdma_ib_mgmt(cur_dev->device, p))
> + continue;

This check wants to be something like is_af_ib_supported(). Checking for IB transport may actually be better than checking for IB management. I don't know if IBoE/RoCE devices support AF_IB.

> +
> if (ib_find_cached_pkey(cur_dev->device, p, pkey,
> &index))
> continue;
>
> @@ -633,10 +633,10 @@ static int cma_modify_qp_rtr(struct rdma_id_private
> *id_priv,
> if (ret)
> goto out;
>
> - if (rdma_node_get_transport(id_priv->cma_dev->device->node_type)
> - == RDMA_TRANSPORT_IB &&
> - rdma_port_get_link_layer(id_priv->id.device, id_priv-
> >id.port_num)
> - == IB_LINK_LAYER_ETHERNET) {
> + /* Will this happen? */
> + BUG_ON(id_priv->cma_dev->device != id_priv->id.device);

This shouldn't happen. The BUG_ON looks okay.

> + if (rdma_transport_iboe(id_priv->id.device, id_priv->id.port_num)) {
> ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL);
>
> if (ret)
> @@ -700,8 +700,7 @@ static int cma_ib_init_qp_attr(struct rdma_id_private
> *id_priv,
> int ret;
> u16 pkey;
>
> - if (rdma_port_get_link_layer(id_priv->id.device, id_priv-
> >id.port_num) ==
> - IB_LINK_LAYER_INFINIBAND)
> + if (rdma_transport_ib(id_priv->id.device, id_priv->id.port_num))
> pkey = ib_addr_get_pkey(dev_addr);
> else
> pkey = 0xffff;

Check here should be against the link layer, not transport.

> @@ -735,8 +734,7 @@ int rdma_init_qp_attr(struct rdma_cm_id *id, struct
> ib_qp_attr *qp_attr,
> int ret = 0;
>
> id_priv = container_of(id, struct rdma_id_private, id);
> - switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> + if (rdma_ib_mgmt(id_priv->id.device, id_priv->id.port_num)) {
> if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
> ret = cma_ib_init_qp_attr(id_priv, qp_attr,
> qp_attr_mask);
> else
> @@ -745,19 +743,16 @@ int rdma_init_qp_attr(struct rdma_cm_id *id, struct
> ib_qp_attr *qp_attr,
>
> if (qp_attr->qp_state == IB_QPS_RTR)
> qp_attr->rq_psn = id_priv->seq_num;
> - break;
> - case RDMA_TRANSPORT_IWARP:
> + } else if (rdma_transport_iwarp(id_priv->id.device,
> + id_priv->id.port_num)) {
> if (!id_priv->cm_id.iw) {
> qp_attr->qp_access_flags = 0;
> *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
> } else
> ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
> qp_attr_mask);
> - break;
> - default:
> + } else
> ret = -ENOSYS;
> - break;
> - }
>
> return ret;
> }
> @@ -928,13 +923,9 @@ static inline int cma_user_data_offset(struct
> rdma_id_private *id_priv)
>
> static void cma_cancel_route(struct rdma_id_private *id_priv)
> {
> - switch (rdma_port_get_link_layer(id_priv->id.device, id_priv-
> >id.port_num)) {
> - case IB_LINK_LAYER_INFINIBAND:
> + if (rdma_transport_ib(id_priv->id.device, id_priv->id.port_num)) {

The check should be cap_ib_sa()

> if (id_priv->query)
> ib_sa_cancel_query(id_priv->query_id, id_priv->query);
> - break;
> - default:
> - break;
> }
> }
>
> @@ -1006,17 +997,14 @@ static void cma_leave_mc_groups(struct
> rdma_id_private *id_priv)
> mc = container_of(id_priv->mc_list.next,
> struct cma_multicast, list);
> list_del(&mc->list);
> - switch (rdma_port_get_link_layer(id_priv->cma_dev->device,
> id_priv->id.port_num)) {
> - case IB_LINK_LAYER_INFINIBAND:
> + if (rdma_transport_ib(id_priv->cma_dev->device,
> + id_priv->id.port_num)) {
> ib_sa_free_multicast(mc->multicast.ib);
> kfree(mc);
> break;

Want cap_ib_mcast()

> - case IB_LINK_LAYER_ETHERNET:
> + } else if (rdma_transport_ib(id_priv->cma_dev->device,
> + id_priv->id.port_num))
> kref_put(&mc->mcref, release_mc);
> - break;
> - default:
> - break;

Just want else /* !cap_ib_mcast */

> - }
> }
> }
>
> @@ -1037,17 +1025,13 @@ void rdma_destroy_id(struct rdma_cm_id *id)
> mutex_unlock(&id_priv->handler_mutex);
>
> if (id_priv->cma_dev) {
> - switch (rdma_node_get_transport(id_priv->id.device-
> >node_type)) {
> - case RDMA_TRANSPORT_IB:
> + if (rdma_ib_mgmt(id_priv->id.device, id_priv->id.port_num)) {
> if (id_priv->cm_id.ib)
> ib_destroy_cm_id(id_priv->cm_id.ib);
> - break;
> - case RDMA_TRANSPORT_IWARP:
> + } else if (rdma_transport_iwarp(id_priv->id.device,
> + id_priv->id.port_num)) {
> if (id_priv->cm_id.iw)
> iw_destroy_cm_id(id_priv->cm_id.iw);
> - break;
> - default:
> - break;
> }
> cma_leave_mc_groups(id_priv);
> cma_release_dev(id_priv);
> @@ -1966,26 +1950,14 @@ int rdma_resolve_route(struct rdma_cm_id *id, int
> timeout_ms)
> return -EINVAL;
>
> atomic_inc(&id_priv->refcount);
> - switch (rdma_node_get_transport(id->device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> - switch (rdma_port_get_link_layer(id->device, id->port_num)) {
> - case IB_LINK_LAYER_INFINIBAND:
> - ret = cma_resolve_ib_route(id_priv, timeout_ms);
> - break;
> - case IB_LINK_LAYER_ETHERNET:
> - ret = cma_resolve_iboe_route(id_priv);
> - break;
> - default:
> - ret = -ENOSYS;
> - }
> - break;
> - case RDMA_TRANSPORT_IWARP:
> + if (rdma_transport_ib(id->device, id->port_num))
> + ret = cma_resolve_ib_route(id_priv, timeout_ms);

Best fit would be cap_ib_sa()

> + else if (rdma_transport_iboe(id->device, id->port_num))
> + ret = cma_resolve_iboe_route(id_priv);
> + else if (rdma_transport_iwarp(id->device, id->port_num))
> ret = cma_resolve_iw_route(id_priv, timeout_ms);
> - break;
> - default:
> + else
> ret = -ENOSYS;
> - break;
> - }
> if (ret)
> goto err;
>
> @@ -2059,7 +2031,7 @@ port_found:
> goto out;
>
> id_priv->id.route.addr.dev_addr.dev_type =
> - (rdma_port_get_link_layer(cma_dev->device, p) ==
> IB_LINK_LAYER_INFINIBAND) ?
> + (rdma_transport_ib(cma_dev->device, p)) ?
> ARPHRD_INFINIBAND : ARPHRD_ETHER;

This wants the link layer, or maybe use cap_ipoib.

>
> rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
> @@ -2536,18 +2508,15 @@ int rdma_listen(struct rdma_cm_id *id, int
> backlog)
>
> id_priv->backlog = backlog;
> if (id->device) {
> - switch (rdma_node_get_transport(id->device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> + if (rdma_ib_mgmt(id->device, id->port_num)) {

Want cap_ib_cm()

> ret = cma_ib_listen(id_priv);
> if (ret)
> goto err;
> - break;
> - case RDMA_TRANSPORT_IWARP:
> + } else if (rdma_transport_iwarp(id->device, id->port_num)) {
> ret = cma_iw_listen(id_priv, backlog);
> if (ret)
> goto err;
> - break;
> - default:
> + } else {
> ret = -ENOSYS;
> goto err;
> }
> @@ -2883,20 +2852,15 @@ int rdma_connect(struct rdma_cm_id *id, struct
> rdma_conn_param *conn_param)
> id_priv->srq = conn_param->srq;
> }
>
> - switch (rdma_node_get_transport(id->device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> + if (rdma_ib_mgmt(id->device, id->port_num)) {

cap_ib_cm()

> if (id->qp_type == IB_QPT_UD)
> ret = cma_resolve_ib_udp(id_priv, conn_param);
> else
> ret = cma_connect_ib(id_priv, conn_param);
> - break;
> - case RDMA_TRANSPORT_IWARP:
> + } else if (rdma_transport_iwarp(id->device, id->port_num))
> ret = cma_connect_iw(id_priv, conn_param);
> - break;
> - default:
> + else
> ret = -ENOSYS;
> - break;
> - }
> if (ret)
> goto err;
>
> @@ -2999,8 +2963,7 @@ int rdma_accept(struct rdma_cm_id *id, struct
> rdma_conn_param *conn_param)
> id_priv->srq = conn_param->srq;
> }
>
> - switch (rdma_node_get_transport(id->device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> + if (rdma_ib_mgmt(id->device, id->port_num)) {

cap_ib_cm()

> if (id->qp_type == IB_QPT_UD) {
> if (conn_param)
> ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
> @@ -3016,14 +2979,10 @@ int rdma_accept(struct rdma_cm_id *id, struct
> rdma_conn_param *conn_param)
> else
> ret = cma_rep_recv(id_priv);
> }
> - break;
> - case RDMA_TRANSPORT_IWARP:
> + } else if (rdma_transport_iwarp(id->device, id->port_num))
> ret = cma_accept_iw(id_priv, conn_param);

If cap_ib_cm() is used in the places marked above, maybe add a cap_iw_cm() for the else conditions.

> - break;
> - default:
> + else
> ret = -ENOSYS;
> - break;
> - }
>
> if (ret)
> goto reject;
> @@ -3067,8 +3026,7 @@ int rdma_reject(struct rdma_cm_id *id, const void
> *private_data,
> if (!id_priv->cm_id.ib)
> return -EINVAL;
>
> - switch (rdma_node_get_transport(id->device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> + if (rdma_ib_mgmt(id->device, id->port_num)) {

cap_ib_cm()

> if (id->qp_type == IB_QPT_UD)
> ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
> private_data, private_data_len);
> @@ -3076,15 +3034,11 @@ int rdma_reject(struct rdma_cm_id *id, const void
> *private_data,
> ret = ib_send_cm_rej(id_priv->cm_id.ib,
> IB_CM_REJ_CONSUMER_DEFINED, NULL,
> 0, private_data, private_data_len);
> - break;
> - case RDMA_TRANSPORT_IWARP:
> + } else if (rdma_transport_iwarp(id->device, id->port_num)) {
> ret = iw_cm_reject(id_priv->cm_id.iw,
> private_data, private_data_len);
> - break;
> - default:
> + } else
> ret = -ENOSYS;
> - break;
> - }
> return ret;
> }
> EXPORT_SYMBOL(rdma_reject);
> @@ -3098,22 +3052,17 @@ int rdma_disconnect(struct rdma_cm_id *id)
> if (!id_priv->cm_id.ib)
> return -EINVAL;
>
> - switch (rdma_node_get_transport(id->device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> + if (rdma_ib_mgmt(id->device, id->port_num)) {
> ret = cma_modify_qp_err(id_priv);
> if (ret)
> goto out;
> /* Initiate or respond to a disconnect. */
> if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
> ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);

cap_ib_cm()

> - break;
> - case RDMA_TRANSPORT_IWARP:
> + } else if (rdma_transport_iwarp(id->device, id->port_num)) {
> ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
> - break;
> - default:
> + } else
> ret = -EINVAL;
> - break;
> - }
> out:
> return ret;
> }
> @@ -3359,24 +3308,13 @@ int rdma_join_multicast(struct rdma_cm_id *id,
> struct sockaddr *addr,
> list_add(&mc->list, &id_priv->mc_list);
> spin_unlock(&id_priv->lock);
>
> - switch (rdma_node_get_transport(id->device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> - switch (rdma_port_get_link_layer(id->device, id->port_num)) {
> - case IB_LINK_LAYER_INFINIBAND:
> - ret = cma_join_ib_multicast(id_priv, mc);
> - break;
> - case IB_LINK_LAYER_ETHERNET:
> - kref_init(&mc->mcref);
> - ret = cma_iboe_join_multicast(id_priv, mc);
> - break;
> - default:
> - ret = -EINVAL;
> - }
> - break;
> - default:
> + if (rdma_transport_iboe(id->device, id->port_num)) {
> + kref_init(&mc->mcref);
> + ret = cma_iboe_join_multicast(id_priv, mc);
> + } else if (rdma_transport_ib(id->device, id->port_num))
> + ret = cma_join_ib_multicast(id_priv, mc);

cap_ib_mcast()

> + else
> ret = -ENOSYS;
> - break;
> - }
>
> if (ret) {
> spin_lock_irq(&id_priv->lock);
> @@ -3404,19 +3342,17 @@ void rdma_leave_multicast(struct rdma_cm_id *id,
> struct sockaddr *addr)
> ib_detach_mcast(id->qp,
> &mc->multicast.ib->rec.mgid,
> be16_to_cpu(mc->multicast.ib-
> >rec.mlid));
> - if (rdma_node_get_transport(id_priv->cma_dev->device-
> >node_type) == RDMA_TRANSPORT_IB) {
> - switch (rdma_port_get_link_layer(id->device, id-
> >port_num)) {
> - case IB_LINK_LAYER_INFINIBAND:
> - ib_sa_free_multicast(mc->multicast.ib);
> - kfree(mc);
> - break;
> - case IB_LINK_LAYER_ETHERNET:
> - kref_put(&mc->mcref, release_mc);
> - break;
> - default:
> - break;
> - }
> - }
> +
> + /* Will this happen? */
> + BUG_ON(id_priv->cma_dev->device != id->device);

Should not happen

> +
> + if (rdma_transport_ib(id->device, id->port_num)) {
> + ib_sa_free_multicast(mc->multicast.ib);
> + kfree(mc);

cap_ib_mcast()

> + } else if (rdma_transport_iboe(id->device,
> + id->port_num))
> + kref_put(&mc->mcref, release_mc);
> +
> return;
> }
> }
> diff --git a/drivers/infiniband/core/ucma.c
> b/drivers/infiniband/core/ucma.c
> index 45d67e9..42c9bf6 100644
> --- a/drivers/infiniband/core/ucma.c
> +++ b/drivers/infiniband/core/ucma.c
> @@ -722,26 +722,13 @@ static ssize_t ucma_query_route(struct ucma_file
> *file,
>
> resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid;
> resp.port_num = ctx->cm_id->port_num;
> - switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) {
> - case RDMA_TRANSPORT_IB:
> - switch (rdma_port_get_link_layer(ctx->cm_id->device,
> - ctx->cm_id->port_num)) {
> - case IB_LINK_LAYER_INFINIBAND:
> - ucma_copy_ib_route(&resp, &ctx->cm_id->route);
> - break;
> - case IB_LINK_LAYER_ETHERNET:
> - ucma_copy_iboe_route(&resp, &ctx->cm_id->route);
> - break;
> - default:
> - break;
> - }
> - break;
> - case RDMA_TRANSPORT_IWARP:
> +
> + if (rdma_transport_ib(ctx->cm_id->device, ctx->cm_id->port_num))
> + ucma_copy_ib_route(&resp, &ctx->cm_id->route);

cap_ib_sa()

> + else if (rdma_transport_iboe(ctx->cm_id->device, ctx->cm_id-
> >port_num))
> + ucma_copy_iboe_route(&resp, &ctx->cm_id->route);
> + else if (rdma_transport_iwarp(ctx->cm_id->device, ctx->cm_id-
> >port_num))
> ucma_copy_iw_route(&resp, &ctx->cm_id->route);
> - break;
> - default:
> - break;
> - }
>
> out:
> if (copy_to_user((void __user *)(unsigned long)cmd.response,

- Sean
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In reply to: Steve Wise: "RE: [PATCH v2 13/17] IB/Verbs: Reform cma/ucma with management helpers"
Next in thread: Michael Wang: "[PATCH v2 14/17] IB/Verbs: Reserve legacy transport type for 'struct rdma_dev_addr'"
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