/******************************************************************* * This file is part of the Emulex RoCE Device Driver for * * RoCE (RDMA over Converged Ethernet) adapters. * * Copyright (C) 2008-2012 Emulex. All rights reserved. * * EMULEX and SLI are trademarks of Emulex. * * www.emulex.com * * * * This program is free software; you can redistribute it and/or * * modify it under the terms of version 2 of the GNU General * * Public License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful. * * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * * TO BE LEGALLY INVALID. See the GNU General Public License for * * more details, a copy of which can be found in the file COPYING * * included with this package. * * * Contact Information: * linux-drivers@emulex.com * * Emulex * 3333 Susan Street * Costa Mesa, CA 92626 *******************************************************************/ #include #include #include #include #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 && (vlan_tag < 0x1000)) { 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) { 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, struct ib_wc *in_wc, struct ib_grh *in_grh, struct ib_mad *in_mad, struct ib_mad *out_mad) { int status; struct ocrdma_dev *dev; 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; }