--- /dev/null
+/*******************************************************************
+ * 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 <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,
+ 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;
+}
Code Review / kvmfornfv.git / blobdiff