| /* This file is part of the Emulex RoCE Device Driver for |
| * RoCE (RDMA over Converged Ethernet) adapters. |
| * Copyright (C) 2012-2015 Emulex. All rights reserved. |
| * EMULEX and SLI are trademarks of Emulex. |
| * www.emulex.com |
| * |
| * This software is available to you under a choice of one of two licenses. |
| * You may choose to be licensed under the terms of the GNU General Public |
| * License (GPL) Version 2, available from the file COPYING in the main |
| * directory of this source tree, or the BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Contact Information: |
| * linux-drivers@emulex.com |
| * |
| * Emulex |
| * 3333 Susan Street |
| * Costa Mesa, CA 92626 |
| */ |
| |
| #include <net/neighbour.h> |
| #include <net/netevent.h> |
| |
| #include <rdma/ib_addr.h> |
| #include <rdma/ib_mad.h> |
| |
| #include "ocrdma.h" |
| #include "ocrdma_verbs.h" |
| #include "ocrdma_ah.h" |
| #include "ocrdma_hw.h" |
| #include "ocrdma_stats.h" |
| |
| #define OCRDMA_VID_PCP_SHIFT 0xD |
| |
| static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah, |
| struct ib_ah_attr *attr, union ib_gid *sgid, |
| int pdid, bool *isvlan) |
| { |
| int status = 0; |
| u16 vlan_tag; |
| struct ocrdma_eth_vlan eth; |
| struct ocrdma_grh grh; |
| int eth_sz; |
| |
| memset(ð, 0, sizeof(eth)); |
| memset(&grh, 0, sizeof(grh)); |
| |
| /* VLAN */ |
| vlan_tag = attr->vlan_id; |
| if (!vlan_tag || (vlan_tag > 0xFFF)) |
| vlan_tag = dev->pvid; |
| if (vlan_tag || dev->pfc_state) { |
| if (!vlan_tag) { |
| pr_err("ocrdma%d:Using VLAN with PFC is recommended\n", |
| dev->id); |
| pr_err("ocrdma%d:Using VLAN 0 for this connection\n", |
| dev->id); |
| } |
| eth.eth_type = cpu_to_be16(0x8100); |
| eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); |
| vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT; |
| eth.vlan_tag = cpu_to_be16(vlan_tag); |
| eth_sz = sizeof(struct ocrdma_eth_vlan); |
| *isvlan = true; |
| } else { |
| eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); |
| eth_sz = sizeof(struct ocrdma_eth_basic); |
| } |
| /* MAC */ |
| memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN); |
| status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]); |
| if (status) |
| return status; |
| ah->sgid_index = attr->grh.sgid_index; |
| memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid)); |
| memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw)); |
| |
| grh.tclass_flow = cpu_to_be32((6 << 28) | |
| (attr->grh.traffic_class << 24) | |
| attr->grh.flow_label); |
| /* 0x1b is next header value in GRH */ |
| grh.pdid_hoplimit = cpu_to_be32((pdid << 16) | |
| (0x1b << 8) | attr->grh.hop_limit); |
| /* Eth HDR */ |
| memcpy(&ah->av->eth_hdr, ð, eth_sz); |
| memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh)); |
| if (*isvlan) |
| ah->av->valid |= OCRDMA_AV_VLAN_VALID; |
| ah->av->valid = cpu_to_le32(ah->av->valid); |
| return status; |
| } |
| |
| struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr) |
| { |
| u32 *ahid_addr; |
| bool isvlan = false; |
| int status; |
| struct ocrdma_ah *ah; |
| struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); |
| struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); |
| union ib_gid sgid; |
| |
| if (!(attr->ah_flags & IB_AH_GRH)) |
| return ERR_PTR(-EINVAL); |
| |
| if (atomic_cmpxchg(&dev->update_sl, 1, 0)) |
| ocrdma_init_service_level(dev); |
| ah = kzalloc(sizeof(*ah), GFP_ATOMIC); |
| if (!ah) |
| return ERR_PTR(-ENOMEM); |
| |
| status = ocrdma_alloc_av(dev, ah); |
| if (status) |
| goto av_err; |
| |
| status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid); |
| if (status) { |
| pr_err("%s(): Failed to query sgid, status = %d\n", |
| __func__, status); |
| goto av_conf_err; |
| } |
| |
| if ((pd->uctx) && |
| (!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) && |
| (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) { |
| status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid, |
| attr->dmac, &attr->vlan_id); |
| if (status) { |
| pr_err("%s(): Failed to resolve dmac from gid." |
| "status = %d\n", __func__, status); |
| goto av_conf_err; |
| } |
| } |
| |
| status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan); |
| if (status) |
| goto av_conf_err; |
| |
| /* if pd is for the user process, pass the ah_id to user space */ |
| if ((pd->uctx) && (pd->uctx->ah_tbl.va)) { |
| ahid_addr = pd->uctx->ah_tbl.va + attr->dlid; |
| *ahid_addr = 0; |
| *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK; |
| if (isvlan) |
| *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK << |
| OCRDMA_AH_VLAN_VALID_SHIFT); |
| } |
| |
| return &ah->ibah; |
| |
| av_conf_err: |
| ocrdma_free_av(dev, ah); |
| av_err: |
| kfree(ah); |
| return ERR_PTR(status); |
| } |
| |
| int ocrdma_destroy_ah(struct ib_ah *ibah) |
| { |
| struct ocrdma_ah *ah = get_ocrdma_ah(ibah); |
| struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device); |
| |
| ocrdma_free_av(dev, ah); |
| kfree(ah); |
| return 0; |
| } |
| |
| int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) |
| { |
| struct ocrdma_ah *ah = get_ocrdma_ah(ibah); |
| struct ocrdma_av *av = ah->av; |
| struct ocrdma_grh *grh; |
| attr->ah_flags |= IB_AH_GRH; |
| if (ah->av->valid & OCRDMA_AV_VALID) { |
| grh = (struct ocrdma_grh *)((u8 *)ah->av + |
| sizeof(struct ocrdma_eth_vlan)); |
| attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13; |
| } else { |
| grh = (struct ocrdma_grh *)((u8 *)ah->av + |
| sizeof(struct ocrdma_eth_basic)); |
| attr->sl = 0; |
| } |
| memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid)); |
| attr->grh.sgid_index = ah->sgid_index; |
| attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff; |
| attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24; |
| attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff; |
| return 0; |
| } |
| |
| int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) |
| { |
| /* modify_ah is unsupported */ |
| return -ENOSYS; |
| } |
| |
| int ocrdma_process_mad(struct ib_device *ibdev, |
| int process_mad_flags, |
| u8 port_num, |
| const struct ib_wc *in_wc, |
| const struct ib_grh *in_grh, |
| const struct ib_mad_hdr *in, size_t in_mad_size, |
| struct ib_mad_hdr *out, size_t *out_mad_size, |
| u16 *out_mad_pkey_index) |
| { |
| int status; |
| struct ocrdma_dev *dev; |
| const struct ib_mad *in_mad = (const struct ib_mad *)in; |
| struct ib_mad *out_mad = (struct ib_mad *)out; |
| |
| if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) || |
| *out_mad_size != sizeof(*out_mad))) |
| return IB_MAD_RESULT_FAILURE; |
| |
| switch (in_mad->mad_hdr.mgmt_class) { |
| case IB_MGMT_CLASS_PERF_MGMT: |
| dev = get_ocrdma_dev(ibdev); |
| if (!ocrdma_pma_counters(dev, out_mad)) |
| status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; |
| else |
| status = IB_MAD_RESULT_SUCCESS; |
| break; |
| default: |
| status = IB_MAD_RESULT_SUCCESS; |
| break; |
| } |
| return status; |
| } |