diff options
Diffstat (limited to 'drivers/infiniband/hw/ocrdma/ocrdma_ah.c')
| -rw-r--r-- | drivers/infiniband/hw/ocrdma/ocrdma_ah.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_ah.c b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c new file mode 100644 index 000000000..88c459283 --- /dev/null +++ b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c @@ -0,0 +1,268 @@ +/* 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 <rdma/ib_cache.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 u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type) +{ + switch (hdr_type) { + case OCRDMA_L3_TYPE_IB_GRH: + return (u16)ETH_P_IBOE; + case OCRDMA_L3_TYPE_IPV4: + return (u16)0x0800; + case OCRDMA_L3_TYPE_IPV6: + return (u16)0x86dd; + default: + pr_err("ocrdma%d: Invalid network header\n", devid); + return 0; + } +} + +static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah, + struct rdma_ah_attr *attr, const union ib_gid *sgid, + int pdid, bool *isvlan, u16 vlan_tag) +{ + int status; + struct ocrdma_eth_vlan eth; + struct ocrdma_grh grh; + int eth_sz; + u16 proto_num = 0; + u8 nxthdr = 0x11; + struct iphdr ipv4; + const struct ib_global_route *ib_grh; + union { + struct sockaddr_in _sockaddr_in; + struct sockaddr_in6 _sockaddr_in6; + } sgid_addr, dgid_addr; + + memset(ð, 0, sizeof(eth)); + memset(&grh, 0, sizeof(grh)); + + /* Protocol Number */ + proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type); + if (!proto_num) + return -EINVAL; + nxthdr = (proto_num == ETH_P_IBOE) ? 0x1b : 0x11; + /* VLAN */ + 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(proto_num); + 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(proto_num); + 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; + ib_grh = rdma_ah_read_grh(attr); + ah->sgid_index = ib_grh->sgid_index; + /* Eth HDR */ + memcpy(&ah->av->eth_hdr, ð, eth_sz); + if (ah->hdr_type == RDMA_NETWORK_IPV4) { + *((__be16 *)&ipv4) = htons((4 << 12) | (5 << 8) | + ib_grh->traffic_class); + ipv4.id = cpu_to_be16(pdid); + ipv4.frag_off = htons(IP_DF); + ipv4.tot_len = htons(0); + ipv4.ttl = ib_grh->hop_limit; + ipv4.protocol = nxthdr; + rdma_gid2ip((struct sockaddr *)&sgid_addr, sgid); + ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr; + rdma_gid2ip((struct sockaddr*)&dgid_addr, &ib_grh->dgid); + ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr; + memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr)); + } else { + memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid)); + grh.tclass_flow = cpu_to_be32((6 << 28) | + (ib_grh->traffic_class << 24) | + ib_grh->flow_label); + memcpy(&grh.dgid[0], ib_grh->dgid.raw, + sizeof(ib_grh->dgid.raw)); + grh.pdid_hoplimit = cpu_to_be32((pdid << 16) | + (nxthdr << 8) | + ib_grh->hop_limit); + 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; +} + +int ocrdma_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, + struct ib_udata *udata) +{ + u32 *ahid_addr; + int status; + struct ocrdma_ah *ah = get_ocrdma_ah(ibah); + bool isvlan = false; + u16 vlan_tag = 0xffff; + const struct ib_gid_attr *sgid_attr; + struct ocrdma_pd *pd = get_ocrdma_pd(ibah->pd); + struct rdma_ah_attr *attr = init_attr->ah_attr; + struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device); + + if ((attr->type != RDMA_AH_ATTR_TYPE_ROCE) || + !(rdma_ah_get_ah_flags(attr) & IB_AH_GRH)) + return -EINVAL; + + 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; + + /* Get network header type for this GID */ + ah->hdr_type = rdma_gid_attr_network_type(sgid_attr); + + status = set_av_attr(dev, ah, attr, &sgid_attr->gid, pd->id, + &isvlan, vlan_tag); + 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 + rdma_ah_get_dlid(attr); + *ahid_addr = 0; + *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK; + if (ocrdma_is_udp_encap_supported(dev)) { + *ahid_addr |= ((u32)ah->hdr_type & + OCRDMA_AH_L3_TYPE_MASK) << + OCRDMA_AH_L3_TYPE_SHIFT; + } + if (isvlan) + *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK << + OCRDMA_AH_VLAN_VALID_SHIFT); + } + + return 0; + +av_conf_err: + ocrdma_free_av(dev, ah); +av_err: + return status; +} + +int ocrdma_destroy_ah(struct ib_ah *ibah, u32 flags) +{ + struct ocrdma_ah *ah = get_ocrdma_ah(ibah); + struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device); + + ocrdma_free_av(dev, ah); + return 0; +} + +int ocrdma_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) +{ + struct ocrdma_ah *ah = get_ocrdma_ah(ibah); + struct ocrdma_av *av = ah->av; + struct ocrdma_grh *grh; + + attr->type = ibah->type; + if (ah->av->valid & OCRDMA_AV_VALID) { + grh = (struct ocrdma_grh *)((u8 *)ah->av + + sizeof(struct ocrdma_eth_vlan)); + rdma_ah_set_sl(attr, be16_to_cpu(av->eth_hdr.vlan_tag) >> 13); + } else { + grh = (struct ocrdma_grh *)((u8 *)ah->av + + sizeof(struct ocrdma_eth_basic)); + rdma_ah_set_sl(attr, 0); + } + rdma_ah_set_grh(attr, NULL, + be32_to_cpu(grh->tclass_flow) & 0xffffffff, + ah->sgid_index, + be32_to_cpu(grh->pdid_hoplimit) & 0xff, + be32_to_cpu(grh->tclass_flow) >> 24); + rdma_ah_set_dgid_raw(attr, &grh->dgid[0]); + return 0; +} + +int ocrdma_process_mad(struct ib_device *ibdev, int process_mad_flags, + u32 port_num, const struct ib_wc *in_wc, + const struct ib_grh *in_grh, const struct ib_mad *in, + struct ib_mad *out, size_t *out_mad_size, + u16 *out_mad_pkey_index) +{ + int status = IB_MAD_RESULT_SUCCESS; + struct ocrdma_dev *dev; + + if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT) { + dev = get_ocrdma_dev(ibdev); + ocrdma_pma_counters(dev, out); + status |= IB_MAD_RESULT_REPLY; + } + + return status; +} |