288 lines
8.6 KiB
C
288 lines
8.6 KiB
C
/* This file is part of the Emulex RoCE Device Driver for
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* RoCE (RDMA over Converged Ethernet) adapters.
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* Copyright (C) 2012-2015 Emulex. All rights reserved.
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* EMULEX and SLI are trademarks of Emulex.
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* www.emulex.com
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*
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* This software is available to you under a choice of one of two licenses.
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* You may choose to be licensed under the terms of the GNU General Public
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* License (GPL) Version 2, available from the file COPYING in the main
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* directory of this source tree, or the BSD license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Contact Information:
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* linux-drivers@emulex.com
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*
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* Emulex
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* 3333 Susan Street
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* Costa Mesa, CA 92626
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*/
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#include <net/neighbour.h>
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#include <net/netevent.h>
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#include <rdma/ib_addr.h>
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#include <rdma/ib_mad.h>
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#include <rdma/ib_cache.h>
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#include "ocrdma.h"
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#include "ocrdma_verbs.h"
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#include "ocrdma_ah.h"
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#include "ocrdma_hw.h"
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#include "ocrdma_stats.h"
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#define OCRDMA_VID_PCP_SHIFT 0xD
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static u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type)
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{
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switch (hdr_type) {
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case OCRDMA_L3_TYPE_IB_GRH:
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return (u16)ETH_P_IBOE;
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case OCRDMA_L3_TYPE_IPV4:
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return (u16)0x0800;
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case OCRDMA_L3_TYPE_IPV6:
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return (u16)0x86dd;
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default:
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pr_err("ocrdma%d: Invalid network header\n", devid);
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return 0;
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}
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}
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static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
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struct rdma_ah_attr *attr, const union ib_gid *sgid,
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int pdid, bool *isvlan, u16 vlan_tag)
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{
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int status;
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struct ocrdma_eth_vlan eth;
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struct ocrdma_grh grh;
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int eth_sz;
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u16 proto_num = 0;
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u8 nxthdr = 0x11;
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struct iphdr ipv4;
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const struct ib_global_route *ib_grh;
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union {
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struct sockaddr_in _sockaddr_in;
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struct sockaddr_in6 _sockaddr_in6;
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} sgid_addr, dgid_addr;
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memset(ð, 0, sizeof(eth));
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memset(&grh, 0, sizeof(grh));
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/* Protocol Number */
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proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type);
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if (!proto_num)
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return -EINVAL;
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nxthdr = (proto_num == ETH_P_IBOE) ? 0x1b : 0x11;
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/* VLAN */
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if (!vlan_tag || (vlan_tag > 0xFFF))
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vlan_tag = dev->pvid;
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if (vlan_tag || dev->pfc_state) {
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if (!vlan_tag) {
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pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
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dev->id);
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pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
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dev->id);
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}
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eth.eth_type = cpu_to_be16(0x8100);
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eth.roce_eth_type = cpu_to_be16(proto_num);
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vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
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eth.vlan_tag = cpu_to_be16(vlan_tag);
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eth_sz = sizeof(struct ocrdma_eth_vlan);
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*isvlan = true;
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} else {
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eth.eth_type = cpu_to_be16(proto_num);
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eth_sz = sizeof(struct ocrdma_eth_basic);
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}
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/* MAC */
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memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
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status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]);
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if (status)
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return status;
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ib_grh = rdma_ah_read_grh(attr);
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ah->sgid_index = ib_grh->sgid_index;
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/* Eth HDR */
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memcpy(&ah->av->eth_hdr, ð, eth_sz);
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if (ah->hdr_type == RDMA_NETWORK_IPV4) {
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*((__be16 *)&ipv4) = htons((4 << 12) | (5 << 8) |
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ib_grh->traffic_class);
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ipv4.id = cpu_to_be16(pdid);
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ipv4.frag_off = htons(IP_DF);
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ipv4.tot_len = htons(0);
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ipv4.ttl = ib_grh->hop_limit;
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ipv4.protocol = nxthdr;
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rdma_gid2ip((struct sockaddr *)&sgid_addr, sgid);
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ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr;
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rdma_gid2ip((struct sockaddr*)&dgid_addr, &ib_grh->dgid);
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ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr;
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memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr));
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} else {
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memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
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grh.tclass_flow = cpu_to_be32((6 << 28) |
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(ib_grh->traffic_class << 24) |
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ib_grh->flow_label);
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memcpy(&grh.dgid[0], ib_grh->dgid.raw,
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sizeof(ib_grh->dgid.raw));
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grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
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(nxthdr << 8) |
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ib_grh->hop_limit);
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memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
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}
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if (*isvlan)
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ah->av->valid |= OCRDMA_AV_VLAN_VALID;
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ah->av->valid = cpu_to_le32(ah->av->valid);
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return status;
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}
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struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct rdma_ah_attr *attr,
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struct ib_udata *udata)
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{
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u32 *ahid_addr;
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int status;
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struct ocrdma_ah *ah;
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bool isvlan = false;
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u16 vlan_tag = 0xffff;
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const struct ib_gid_attr *sgid_attr;
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struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
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struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
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if ((attr->type != RDMA_AH_ATTR_TYPE_ROCE) ||
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!(rdma_ah_get_ah_flags(attr) & IB_AH_GRH))
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return ERR_PTR(-EINVAL);
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if (atomic_cmpxchg(&dev->update_sl, 1, 0))
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ocrdma_init_service_level(dev);
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ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
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if (!ah)
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return ERR_PTR(-ENOMEM);
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status = ocrdma_alloc_av(dev, ah);
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if (status)
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goto av_err;
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sgid_attr = attr->grh.sgid_attr;
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if (is_vlan_dev(sgid_attr->ndev))
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vlan_tag = vlan_dev_vlan_id(sgid_attr->ndev);
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/* Get network header type for this GID */
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ah->hdr_type = rdma_gid_attr_network_type(sgid_attr);
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status = set_av_attr(dev, ah, attr, &sgid_attr->gid, pd->id,
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&isvlan, vlan_tag);
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if (status)
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goto av_conf_err;
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/* if pd is for the user process, pass the ah_id to user space */
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if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
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ahid_addr = pd->uctx->ah_tbl.va + rdma_ah_get_dlid(attr);
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*ahid_addr = 0;
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*ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
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if (ocrdma_is_udp_encap_supported(dev)) {
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*ahid_addr |= ((u32)ah->hdr_type &
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OCRDMA_AH_L3_TYPE_MASK) <<
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OCRDMA_AH_L3_TYPE_SHIFT;
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}
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if (isvlan)
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*ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
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OCRDMA_AH_VLAN_VALID_SHIFT);
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}
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return &ah->ibah;
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av_conf_err:
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ocrdma_free_av(dev, ah);
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av_err:
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kfree(ah);
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return ERR_PTR(status);
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}
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int ocrdma_destroy_ah(struct ib_ah *ibah)
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{
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struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
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struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
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ocrdma_free_av(dev, ah);
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kfree(ah);
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return 0;
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}
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int ocrdma_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
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{
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struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
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struct ocrdma_av *av = ah->av;
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struct ocrdma_grh *grh;
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attr->type = ibah->type;
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if (ah->av->valid & OCRDMA_AV_VALID) {
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grh = (struct ocrdma_grh *)((u8 *)ah->av +
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sizeof(struct ocrdma_eth_vlan));
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rdma_ah_set_sl(attr, be16_to_cpu(av->eth_hdr.vlan_tag) >> 13);
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} else {
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grh = (struct ocrdma_grh *)((u8 *)ah->av +
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sizeof(struct ocrdma_eth_basic));
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rdma_ah_set_sl(attr, 0);
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}
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rdma_ah_set_grh(attr, NULL,
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be32_to_cpu(grh->tclass_flow) & 0xffffffff,
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ah->sgid_index,
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be32_to_cpu(grh->pdid_hoplimit) & 0xff,
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be32_to_cpu(grh->tclass_flow) >> 24);
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rdma_ah_set_dgid_raw(attr, &grh->dgid[0]);
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return 0;
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}
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int ocrdma_process_mad(struct ib_device *ibdev,
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int process_mad_flags,
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u8 port_num,
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const struct ib_wc *in_wc,
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const struct ib_grh *in_grh,
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const struct ib_mad_hdr *in, size_t in_mad_size,
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struct ib_mad_hdr *out, size_t *out_mad_size,
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u16 *out_mad_pkey_index)
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{
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int status;
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struct ocrdma_dev *dev;
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const struct ib_mad *in_mad = (const struct ib_mad *)in;
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struct ib_mad *out_mad = (struct ib_mad *)out;
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if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
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*out_mad_size != sizeof(*out_mad)))
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return IB_MAD_RESULT_FAILURE;
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switch (in_mad->mad_hdr.mgmt_class) {
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case IB_MGMT_CLASS_PERF_MGMT:
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dev = get_ocrdma_dev(ibdev);
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if (!ocrdma_pma_counters(dev, out_mad))
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status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
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else
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status = IB_MAD_RESULT_SUCCESS;
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break;
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default:
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status = IB_MAD_RESULT_SUCCESS;
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break;
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}
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return status;
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}
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