X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Finfiniband%2Fhw%2Focrdma%2Focrdma_ah.c;fp=kernel%2Fdrivers%2Finfiniband%2Fhw%2Focrdma%2Focrdma_ah.c;h=f5a5ea836dbdc9fe4f12e6f26e1acca5dac3c6d1;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/infiniband/hw/ocrdma/ocrdma_ah.c b/kernel/drivers/infiniband/hw/ocrdma/ocrdma_ah.c new file mode 100644 index 000000000..f5a5ea836 --- /dev/null +++ b/kernel/drivers/infiniband/hw/ocrdma/ocrdma_ah.c @@ -0,0 +1,227 @@ +/******************************************************************* + * 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 || 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, + 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; +}