From: Parav Pandit Date: Thu, 2 May 2019 07:48:03 +0000 (+0300) Subject: RDMA: Introduce and use GID attr helper to read RoCE L2 fields X-Git-Tag: v5.2-rc1~114^2~31 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=a70c07397fd80dfeeaead15751ab71449b548826;p=linux.git RDMA: Introduce and use GID attr helper to read RoCE L2 fields Instead of RoCE drivers figuring out vlan, smac fields while working on QP/AH, provide a helper routine to read the L2 fields such as vlan_id and source mac address. This moves logic from mlx5 driver to core for wider usage for RoCE ports. This is a preparation patch to allow detaching netdev in subsequent patch. Signed-off-by: Parav Pandit Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c index 7499e7016e38..c164e377e563 100644 --- a/drivers/infiniband/core/cache.c +++ b/drivers/infiniband/core/cache.c @@ -1250,6 +1250,61 @@ struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr) return ndev; } +static int get_lower_dev_vlan(struct net_device *lower_dev, void *data) +{ + u16 *vlan_id = data; + + if (is_vlan_dev(lower_dev)) + *vlan_id = vlan_dev_vlan_id(lower_dev); + + /* We are interested only in first level vlan device, so + * always return 1 to stop iterating over next level devices. + */ + return 1; +} + +/** + * rdma_read_gid_l2_fields - Read the vlan ID and source MAC address + * of a GID entry. + * + * @attr: GID attribute pointer whose L2 fields to be read + * @vlan_id: Pointer to vlan id to fill up if the GID entry has + * vlan id. It is optional. + * @smac: Pointer to smac to fill up for a GID entry. It is optional. + * + * rdma_read_gid_l2_fields() returns 0 on success and returns vlan id + * (if gid entry has vlan) and source MAC, or returns error. + */ +int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr, + u16 *vlan_id, u8 *smac) +{ + struct net_device *ndev; + + ndev = attr->ndev; + if (!ndev) + return -EINVAL; + + if (smac) + ether_addr_copy(smac, ndev->dev_addr); + if (vlan_id) { + *vlan_id = 0xffff; + if (is_vlan_dev(ndev)) { + *vlan_id = vlan_dev_vlan_id(ndev); + } else { + /* If the netdev is upper device and if it's lower + * device is vlan device, consider vlan id of the + * the lower vlan device for this gid entry. + */ + rcu_read_lock(); + netdev_walk_all_lower_dev_rcu(attr->ndev, + get_lower_dev_vlan, vlan_id); + rcu_read_unlock(); + } + } + return 0; +} +EXPORT_SYMBOL(rdma_read_gid_l2_fields); + static int config_non_roce_gid_cache(struct ib_device *device, u8 port, int gid_tbl_len) { diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c index 3fcc77c03903..cde789cb691b 100644 --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c @@ -360,8 +360,9 @@ int bnxt_re_add_gid(const struct ib_gid_attr *attr, void **context) struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev); struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl; - if ((attr->ndev) && is_vlan_dev(attr->ndev)) - vlan_id = vlan_dev_vlan_id(attr->ndev); + rc = rdma_read_gid_l2_fields(attr, &vlan_id, NULL); + if (rc) + return rc; rc = bnxt_qplib_add_sgid(sgid_tbl, (struct bnxt_qplib_gid *)&attr->gid, rdev->qplib_res.netdev->dev_addr, @@ -1637,8 +1638,11 @@ int bnxt_re_modify_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr, qp_attr->ah_attr.roce.dmac); sgid_attr = qp_attr->ah_attr.grh.sgid_attr; - memcpy(qp->qplib_qp.smac, sgid_attr->ndev->dev_addr, - ETH_ALEN); + rc = rdma_read_gid_l2_fields(sgid_attr, NULL, + &qp->qplib_qp.smac[0]); + if (rc) + return rc; + nw_type = rdma_gid_attr_network_type(sgid_attr); switch (nw_type) { case RDMA_NETWORK_IPV4: @@ -1857,8 +1861,10 @@ static int bnxt_re_build_qp1_send_v2(struct bnxt_re_qp *qp, memset(&qp->qp1_hdr, 0, sizeof(qp->qp1_hdr)); - if (is_vlan_dev(sgid_attr->ndev)) - vlan_id = vlan_dev_vlan_id(sgid_attr->ndev); + rc = rdma_read_gid_l2_fields(sgid_attr, &vlan_id, NULL); + if (rc) + return rc; + /* Get network header type for this GID */ nw_type = rdma_gid_attr_network_type(sgid_attr); switch (nw_type) { diff --git a/drivers/infiniband/hw/hns/hns_roce_ah.c b/drivers/infiniband/hw/hns/hns_roce_ah.c index d9498313ea46..cdd2ac24fc2a 100644 --- a/drivers/infiniband/hw/hns/hns_roce_ah.c +++ b/drivers/infiniband/hw/hns/hns_roce_ah.c @@ -49,20 +49,22 @@ int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr, u16 vlan_tag = 0xffff; const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr); bool vlan_en = false; + int ret; + + gid_attr = ah_attr->grh.sgid_attr; + ret = rdma_read_gid_l2_fields(gid_attr, &vlan_tag, NULL); + if (ret) + return ret; /* Get mac address */ memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN); - gid_attr = ah_attr->grh.sgid_attr; - if (is_vlan_dev(gid_attr->ndev)) { - vlan_tag = vlan_dev_vlan_id(gid_attr->ndev); + if (vlan_tag < VLAN_CFI_MASK) { vlan_en = true; - } - - if (vlan_tag < 0x1000) vlan_tag |= (rdma_ah_get_sl(ah_attr) & HNS_ROCE_VLAN_SL_BIT_MASK) << HNS_ROCE_VLAN_SL_SHIFT; + } ah->av.port_pd = cpu_to_le32(to_hr_pd(ibah->pd)->pdn | (rdma_ah_get_port_num(ah_attr) << diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index f155d2d0b8cd..b5392cb5b20f 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -37,6 +37,7 @@ #include #include #include +#include #include #include @@ -3984,10 +3985,12 @@ static int hns_roce_v2_modify_qp(struct ib_qp *ibqp, if (is_roce_protocol) { gid_attr = attr->ah_attr.grh.sgid_attr; - vlan = rdma_vlan_dev_vlan_id(gid_attr->ndev); + ret = rdma_read_gid_l2_fields(gid_attr, &vlan, NULL); + if (ret) + goto out; } - if (is_vlan_dev(gid_attr->ndev)) { + if (vlan < VLAN_CFI_MASK) { roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_RQ_VLAN_EN_S, 1); roce_set_bit(qpc_mask->byte_76_srqn_op_en, diff --git a/drivers/infiniband/hw/mlx4/ah.c b/drivers/infiniband/hw/mlx4/ah.c index b53772ab2401..02a169f8027b 100644 --- a/drivers/infiniband/hw/mlx4/ah.c +++ b/drivers/infiniband/hw/mlx4/ah.c @@ -99,9 +99,11 @@ static int create_iboe_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr) */ gid_attr = ah_attr->grh.sgid_attr; if (gid_attr) { - if (is_vlan_dev(gid_attr->ndev)) - vlan_tag = vlan_dev_vlan_id(gid_attr->ndev); - memcpy(ah->av.eth.s_mac, gid_attr->ndev->dev_addr, ETH_ALEN); + ret = rdma_read_gid_l2_fields(gid_attr, &vlan_tag, + &ah->av.eth.s_mac[0]); + if (ret) + return ret; + ret = mlx4_ib_gid_index_to_real_index(ibdev, gid_attr); if (ret < 0) return ret; diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c index 364e16b5f8e1..bb1c6eb31b32 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -2248,8 +2248,10 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type, if (is_eth) { gid_attr = attr->ah_attr.grh.sgid_attr; - vlan = rdma_vlan_dev_vlan_id(gid_attr->ndev); - memcpy(smac, gid_attr->ndev->dev_addr, ETH_ALEN); + err = rdma_read_gid_l2_fields(gid_attr, &vlan, + &smac[0]); + if (err) + goto out; } if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path, diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 6135a0b285de..5ac24bce6e77 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -574,52 +574,22 @@ static int mlx5_query_port_roce(struct ib_device *device, u8 port_num, return err; } -struct mlx5_ib_vlan_info { - u16 vlan_id; - bool vlan; -}; - -static int get_lower_dev_vlan(struct net_device *lower_dev, void *data) -{ - struct mlx5_ib_vlan_info *vlan_info = data; - - if (is_vlan_dev(lower_dev)) { - vlan_info->vlan = true; - vlan_info->vlan_id = vlan_dev_vlan_id(lower_dev); - } - /* We are interested only in first level vlan device, so - * always return 1 to stop iterating over next level devices. - */ - return 1; -} - static int set_roce_addr(struct mlx5_ib_dev *dev, u8 port_num, unsigned int index, const union ib_gid *gid, const struct ib_gid_attr *attr) { enum ib_gid_type gid_type = IB_GID_TYPE_IB; - struct mlx5_ib_vlan_info vlan_info = { }; + u16 vlan_id = 0xffff; u8 roce_version = 0; u8 roce_l3_type = 0; u8 mac[ETH_ALEN]; + int ret; if (gid) { gid_type = attr->gid_type; - ether_addr_copy(mac, attr->ndev->dev_addr); - - if (is_vlan_dev(attr->ndev)) { - vlan_info.vlan = true; - vlan_info.vlan_id = vlan_dev_vlan_id(attr->ndev); - } else { - /* If the netdev is upper device and if it's lower - * lower device is vlan device, consider vlan id of - * the lower vlan device for this gid entry. - */ - rcu_read_lock(); - netdev_walk_all_lower_dev_rcu(attr->ndev, - get_lower_dev_vlan, &vlan_info); - rcu_read_unlock(); - } + ret = rdma_read_gid_l2_fields(attr, &vlan_id, &mac[0]); + if (ret) + return ret; } switch (gid_type) { @@ -640,7 +610,7 @@ static int set_roce_addr(struct mlx5_ib_dev *dev, u8 port_num, return mlx5_core_roce_gid_set(dev->mdev, index, roce_version, roce_l3_type, gid->raw, mac, - vlan_info.vlan, vlan_info.vlan_id, + vlan_id < VLAN_CFI_MASK, vlan_id, port_num); } diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_ah.c b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c index a17747cb086a..1d4ea135c28f 100644 --- a/drivers/infiniband/hw/ocrdma/ocrdma_ah.c +++ b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c @@ -175,14 +175,15 @@ int ocrdma_create_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr, u32 flags, if (atomic_cmpxchg(&dev->update_sl, 1, 0)) ocrdma_init_service_level(dev); + sgid_attr = attr->grh.sgid_attr; + status = rdma_read_gid_l2_fields(sgid_attr, &vlan_tag, NULL); + if (status) + return status; + status = ocrdma_alloc_av(dev, ah); if (status) goto av_err; - sgid_attr = attr->grh.sgid_attr; - if (is_vlan_dev(sgid_attr->ndev)) - vlan_tag = vlan_dev_vlan_id(sgid_attr->ndev); - /* Get network header type for this GID */ ah->hdr_type = rdma_gid_attr_network_type(sgid_attr); diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c index 5d96b5a94583..32674b291f60 100644 --- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c +++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c @@ -2496,7 +2496,7 @@ static int ocrdma_set_av_params(struct ocrdma_qp *qp, int status; struct rdma_ah_attr *ah_attr = &attrs->ah_attr; const struct ib_gid_attr *sgid_attr; - u32 vlan_id = 0xFFFF; + u16 vlan_id = 0xFFFF; u8 mac_addr[6], hdr_type; union { struct sockaddr _sockaddr; @@ -2526,8 +2526,9 @@ static int ocrdma_set_av_params(struct ocrdma_qp *qp, sizeof(cmd->params.dgid)); sgid_attr = ah_attr->grh.sgid_attr; - vlan_id = rdma_vlan_dev_vlan_id(sgid_attr->ndev); - memcpy(mac_addr, sgid_attr->ndev->dev_addr, ETH_ALEN); + status = rdma_read_gid_l2_fields(sgid_attr, &vlan_id, &mac_addr[0]); + if (status) + return status; qp->sgid_idx = grh->sgid_index; memcpy(&cmd->params.sgid[0], &sgid_attr->gid.raw[0], diff --git a/drivers/infiniband/hw/qedr/qedr_roce_cm.c b/drivers/infiniband/hw/qedr/qedr_roce_cm.c index e1ac2fd60bb1..f5542d703ef9 100644 --- a/drivers/infiniband/hw/qedr/qedr_roce_cm.c +++ b/drivers/infiniband/hw/qedr/qedr_roce_cm.c @@ -397,14 +397,17 @@ static inline int qedr_gsi_build_header(struct qedr_dev *dev, bool has_udp = false; int i; - send_size = 0; - for (i = 0; i < swr->num_sge; ++i) - send_size += swr->sg_list[i].length; + rc = rdma_read_gid_l2_fields(sgid_attr, &vlan_id, NULL); + if (rc) + return rc; - vlan_id = rdma_vlan_dev_vlan_id(sgid_attr->ndev); if (vlan_id < VLAN_CFI_MASK) has_vlan = true; + send_size = 0; + for (i = 0; i < swr->num_sge; ++i) + send_size += swr->sg_list[i].length; + has_udp = (sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP); if (!has_udp) { /* RoCE v1 */ diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c index 5e92b6229da2..e52d8761d681 100644 --- a/drivers/infiniband/hw/qedr/verbs.c +++ b/drivers/infiniband/hw/qedr/verbs.c @@ -1050,10 +1050,13 @@ static inline int get_gid_info_from_table(struct ib_qp *ibqp, enum rdma_network_type nw_type; const struct ib_global_route *grh = rdma_ah_read_grh(&attr->ah_attr); u32 ipv4_addr; + int ret; int i; gid_attr = grh->sgid_attr; - qp_params->vlan_id = rdma_vlan_dev_vlan_id(gid_attr->ndev); + ret = rdma_read_gid_l2_fields(gid_attr, &qp_params->vlan_id, NULL); + if (ret) + return ret; nw_type = rdma_gid_attr_network_type(gid_attr); switch (nw_type) { diff --git a/include/rdma/ib_cache.h b/include/rdma/ib_cache.h index 62e990b620aa..730a65ad8c74 100644 --- a/include/rdma/ib_cache.h +++ b/include/rdma/ib_cache.h @@ -54,6 +54,9 @@ const struct ib_gid_attr *rdma_find_gid_by_filter( void *), void *context); +int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr, + u16 *vlan_id, u8 *smac); + /** * ib_get_cached_pkey - Returns a cached PKey table entry * @device: The device to query.