258 lines
7.6 KiB
C
258 lines
7.6 KiB
C
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/*
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* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <rdma/ib_addr.h>
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#include <rdma/ib_cache.h>
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#include <linux/slab.h>
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#include <linux/inet.h>
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#include <linux/string.h>
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#include <linux/mlx4/driver.h>
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#include "mlx4_ib.h"
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static struct ib_ah *create_ib_ah(struct ib_pd *pd,
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struct rdma_ah_attr *ah_attr,
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struct mlx4_ib_ah *ah)
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{
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struct mlx4_dev *dev = to_mdev(pd->device)->dev;
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ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn |
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(rdma_ah_get_port_num(ah_attr) << 24));
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ah->av.ib.g_slid = rdma_ah_get_path_bits(ah_attr);
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ah->av.ib.sl_tclass_flowlabel =
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cpu_to_be32(rdma_ah_get_sl(ah_attr) << 28);
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if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
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const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
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ah->av.ib.g_slid |= 0x80;
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ah->av.ib.gid_index = grh->sgid_index;
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ah->av.ib.hop_limit = grh->hop_limit;
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ah->av.ib.sl_tclass_flowlabel |=
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cpu_to_be32((grh->traffic_class << 20) |
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grh->flow_label);
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memcpy(ah->av.ib.dgid, grh->dgid.raw, 16);
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}
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ah->av.ib.dlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));
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if (rdma_ah_get_static_rate(ah_attr)) {
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u8 static_rate = rdma_ah_get_static_rate(ah_attr) +
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MLX4_STAT_RATE_OFFSET;
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while (static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
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!(1 << static_rate & dev->caps.stat_rate_support))
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--static_rate;
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ah->av.ib.stat_rate = static_rate;
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}
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return &ah->ibah;
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}
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static struct ib_ah *create_iboe_ah(struct ib_pd *pd,
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struct rdma_ah_attr *ah_attr,
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struct mlx4_ib_ah *ah)
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{
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struct mlx4_ib_dev *ibdev = to_mdev(pd->device);
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const struct ib_gid_attr *gid_attr;
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struct mlx4_dev *dev = ibdev->dev;
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int is_mcast = 0;
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struct in6_addr in6;
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u16 vlan_tag = 0xffff;
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const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
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int ret;
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memcpy(&in6, grh->dgid.raw, sizeof(in6));
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if (rdma_is_multicast_addr(&in6))
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is_mcast = 1;
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memcpy(ah->av.eth.mac, ah_attr->roce.dmac, ETH_ALEN);
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eth_zero_addr(ah->av.eth.s_mac);
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/*
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* If sgid_attr is NULL we are being called by mlx4_ib_create_ah_slave
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* and we are directly creating an AV for a slave's gid_index.
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*/
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gid_attr = ah_attr->grh.sgid_attr;
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if (gid_attr) {
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if (is_vlan_dev(gid_attr->ndev))
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vlan_tag = vlan_dev_vlan_id(gid_attr->ndev);
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memcpy(ah->av.eth.s_mac, gid_attr->ndev->dev_addr, ETH_ALEN);
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ret = mlx4_ib_gid_index_to_real_index(ibdev, gid_attr);
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if (ret < 0)
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return ERR_PTR(ret);
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ah->av.eth.gid_index = ret;
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} else {
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/* mlx4_ib_create_ah_slave fills in the s_mac and the vlan */
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ah->av.eth.gid_index = ah_attr->grh.sgid_index;
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}
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if (vlan_tag < 0x1000)
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vlan_tag |= (rdma_ah_get_sl(ah_attr) & 7) << 13;
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ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn |
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(rdma_ah_get_port_num(ah_attr) << 24));
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ah->av.eth.vlan = cpu_to_be16(vlan_tag);
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ah->av.eth.hop_limit = grh->hop_limit;
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if (rdma_ah_get_static_rate(ah_attr)) {
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ah->av.eth.stat_rate = rdma_ah_get_static_rate(ah_attr) +
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MLX4_STAT_RATE_OFFSET;
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while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
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!(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support))
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--ah->av.eth.stat_rate;
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}
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ah->av.eth.sl_tclass_flowlabel |=
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cpu_to_be32((grh->traffic_class << 20) |
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grh->flow_label);
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/*
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* HW requires multicast LID so we just choose one.
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*/
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if (is_mcast)
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ah->av.ib.dlid = cpu_to_be16(0xc000);
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memcpy(ah->av.eth.dgid, grh->dgid.raw, 16);
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ah->av.eth.sl_tclass_flowlabel |= cpu_to_be32(rdma_ah_get_sl(ah_attr)
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<< 29);
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return &ah->ibah;
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}
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struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
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struct ib_udata *udata)
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{
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struct mlx4_ib_ah *ah;
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struct ib_ah *ret;
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ah = kzalloc(sizeof *ah, GFP_ATOMIC);
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if (!ah)
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return ERR_PTR(-ENOMEM);
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if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
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if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH)) {
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ret = ERR_PTR(-EINVAL);
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} else {
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/*
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* TBD: need to handle the case when we get
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* called in an atomic context and there we
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* might sleep. We don't expect this
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* currently since we're working with link
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* local addresses which we can translate
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* without going to sleep.
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*/
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ret = create_iboe_ah(pd, ah_attr, ah);
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}
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if (IS_ERR(ret))
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kfree(ah);
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return ret;
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} else
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return create_ib_ah(pd, ah_attr, ah); /* never fails */
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}
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/* AH's created via this call must be free'd by mlx4_ib_destroy_ah. */
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struct ib_ah *mlx4_ib_create_ah_slave(struct ib_pd *pd,
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struct rdma_ah_attr *ah_attr,
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int slave_sgid_index, u8 *s_mac,
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u16 vlan_tag)
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{
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struct rdma_ah_attr slave_attr = *ah_attr;
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struct mlx4_ib_ah *mah;
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struct ib_ah *ah;
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slave_attr.grh.sgid_attr = NULL;
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slave_attr.grh.sgid_index = slave_sgid_index;
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ah = mlx4_ib_create_ah(pd, &slave_attr, NULL);
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if (IS_ERR(ah))
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return ah;
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ah->device = pd->device;
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ah->pd = pd;
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ah->type = ah_attr->type;
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mah = to_mah(ah);
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/* get rid of force-loopback bit */
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mah->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF);
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if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE)
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memcpy(mah->av.eth.s_mac, s_mac, 6);
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if (vlan_tag < 0x1000)
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vlan_tag |= (rdma_ah_get_sl(ah_attr) & 7) << 13;
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mah->av.eth.vlan = cpu_to_be16(vlan_tag);
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return ah;
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}
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int mlx4_ib_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
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{
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struct mlx4_ib_ah *ah = to_mah(ibah);
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int port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;
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memset(ah_attr, 0, sizeof *ah_attr);
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ah_attr->type = ibah->type;
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if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
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rdma_ah_set_dlid(ah_attr, 0);
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rdma_ah_set_sl(ah_attr,
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be32_to_cpu(ah->av.eth.sl_tclass_flowlabel)
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>> 29);
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} else {
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rdma_ah_set_dlid(ah_attr, be16_to_cpu(ah->av.ib.dlid));
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rdma_ah_set_sl(ah_attr,
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be32_to_cpu(ah->av.ib.sl_tclass_flowlabel)
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>> 28);
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}
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rdma_ah_set_port_num(ah_attr, port_num);
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if (ah->av.ib.stat_rate)
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rdma_ah_set_static_rate(ah_attr,
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ah->av.ib.stat_rate -
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MLX4_STAT_RATE_OFFSET);
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rdma_ah_set_path_bits(ah_attr, ah->av.ib.g_slid & 0x7F);
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if (mlx4_ib_ah_grh_present(ah)) {
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u32 tc_fl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel);
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rdma_ah_set_grh(ah_attr, NULL,
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tc_fl & 0xfffff, ah->av.ib.gid_index,
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ah->av.ib.hop_limit,
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tc_fl >> 20);
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rdma_ah_set_dgid_raw(ah_attr, ah->av.ib.dgid);
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}
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return 0;
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}
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int mlx4_ib_destroy_ah(struct ib_ah *ah)
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{
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kfree(to_mah(ah));
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return 0;
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}
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