From 9327c7afdce3780895728c8977144bf3b5f854c5 Mon Sep 17 00:00:00 2001 From: Parav Pandit Date: Mon, 8 Jan 2018 17:04:44 +0200 Subject: [PATCH] RDMA/cma: Provide a function to set RoCE path record L2 parameters Introduce a helper function to set path record L2 fields for RoCE. This includes setting GID type, destination mac address and netdev ifindex. Signed-off-by: Parav Pandit Reviewed-by: Mark Bloch Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/core/cma.c | 88 +++++++++++++++++++++-------------- 1 file changed, 53 insertions(+), 35 deletions(-) diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 7db2355541f6..5bcbb5c5ea1c 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -2465,6 +2465,58 @@ err1: return ret; } +static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type, + unsigned long supported_gids, + enum ib_gid_type default_gid) +{ + if ((network_type == RDMA_NETWORK_IPV4 || + network_type == RDMA_NETWORK_IPV6) && + test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids)) + return IB_GID_TYPE_ROCE_UDP_ENCAP; + + return default_gid; +} + +/* + * cma_iboe_set_path_rec_l2_fields() is helper function which sets + * path record type based on GID type. + * It also sets up other L2 fields which includes destination mac address + * netdev ifindex, of the path record. + * It returns the netdev of the bound interface for this path record entry. + */ +static struct net_device * +cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv) +{ + struct rdma_route *route = &id_priv->id.route; + enum ib_gid_type gid_type = IB_GID_TYPE_ROCE; + struct rdma_addr *addr = &route->addr; + unsigned long supported_gids; + struct net_device *ndev; + + if (!addr->dev_addr.bound_dev_if) + return NULL; + + ndev = dev_get_by_index(addr->dev_addr.net, + addr->dev_addr.bound_dev_if); + if (!ndev) + return NULL; + + supported_gids = roce_gid_type_mask_support(id_priv->id.device, + id_priv->id.port_num); + gid_type = cma_route_gid_type(addr->dev_addr.network, + supported_gids, + id_priv->gid_type); + /* Use the hint from IP Stack to select GID Type */ + if (gid_type < ib_network_to_gid_type(addr->dev_addr.network)) + gid_type = ib_network_to_gid_type(addr->dev_addr.network); + route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type); + + sa_path_set_ndev(route->path_rec, addr->dev_addr.net); + sa_path_set_ifindex(route->path_rec, ndev->ifindex); + sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr); + return ndev; +} + int rdma_set_ib_paths(struct rdma_cm_id *id, struct sa_path_rec *path_rec, int num_paths) { @@ -2522,18 +2574,6 @@ static int iboe_tos_to_sl(struct net_device *ndev, int tos) return 0; } -static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type, - unsigned long supported_gids, - enum ib_gid_type default_gid) -{ - if ((network_type == RDMA_NETWORK_IPV4 || - network_type == RDMA_NETWORK_IPV6) && - test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids)) - return IB_GID_TYPE_ROCE_UDP_ENCAP; - - return default_gid; -} - static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) { struct rdma_route *route = &id_priv->id.route; @@ -2541,8 +2581,6 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) struct cma_work *work; int ret; struct net_device *ndev; - enum ib_gid_type gid_type = IB_GID_TYPE_ROCE; - unsigned long supported_gids; u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num - rdma_start_port(id_priv->cma_dev->device)]; @@ -2561,32 +2599,12 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) route->num_paths = 1; - if (!addr->dev_addr.bound_dev_if) { - ret = -ENODEV; - goto err2; - } - - ndev = dev_get_by_index(addr->dev_addr.net, - addr->dev_addr.bound_dev_if); + ndev = cma_iboe_set_path_rec_l2_fields(id_priv); if (!ndev) { ret = -ENODEV; goto err2; } - supported_gids = roce_gid_type_mask_support(id_priv->id.device, - id_priv->id.port_num); - gid_type = cma_route_gid_type(addr->dev_addr.network, - supported_gids, - id_priv->gid_type); - /* Use the hint from IP Stack to select GID Type */ - if (gid_type < ib_network_to_gid_type(addr->dev_addr.network)) - gid_type = ib_network_to_gid_type(addr->dev_addr.network); - route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type); - - sa_path_set_ndev(route->path_rec, addr->dev_addr.net); - sa_path_set_ifindex(route->path_rec, ndev->ifindex); - sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr); - rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, &route->path_rec->sgid); rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, -- 2.30.2