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/* 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_attr *attr, u32 flags,
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 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;
}
void 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);
}
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,
u8 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;
}
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