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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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477864c8fc
Add struct ib_udata to the signature of create_ah callback that is implemented by IB device drivers. This allows HW drivers to return extra data to the userspace library. This patch prepares the ground for mlx5 driver to resolve destination mac address for a given GID and return it to userspace. This patch was previously submitted by Knut Omang as a part of the patch set to support Oracle's Infiniband HCA (SIF). Signed-off-by: Knut Omang <knut.omang@oracle.com> Signed-off-by: Moni Shoua <monis@mellanox.com> Reviewed-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/*
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* Copyright (c) 2016 Hisilicon Limited.
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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 <linux/platform_device.h>
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#include <rdma/ib_addr.h>
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#include <rdma/ib_cache.h>
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#include "hns_roce_device.h"
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#define HNS_ROCE_PORT_NUM_SHIFT 24
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#define HNS_ROCE_VLAN_SL_BIT_MASK 7
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#define HNS_ROCE_VLAN_SL_SHIFT 13
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struct ib_ah *hns_roce_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *ah_attr,
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struct ib_udata *udata)
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{
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struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
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struct device *dev = &hr_dev->pdev->dev;
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struct ib_gid_attr gid_attr;
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struct hns_roce_ah *ah;
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u16 vlan_tag = 0xffff;
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struct in6_addr in6;
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union ib_gid sgid;
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int 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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/* Get mac address */
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memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(ah_attr->grh.dgid.raw));
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if (rdma_is_multicast_addr(&in6))
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rdma_get_mcast_mac(&in6, ah->av.mac);
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else
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memcpy(ah->av.mac, ah_attr->dmac, sizeof(ah_attr->dmac));
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/* Get source gid */
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ret = ib_get_cached_gid(ibpd->device, ah_attr->port_num,
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ah_attr->grh.sgid_index, &sgid, &gid_attr);
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if (ret) {
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dev_err(dev, "get sgid failed! ret = %d\n", ret);
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kfree(ah);
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return ERR_PTR(ret);
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}
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if (gid_attr.ndev) {
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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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dev_put(gid_attr.ndev);
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}
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if (vlan_tag < 0x1000)
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vlan_tag |= (ah_attr->sl & HNS_ROCE_VLAN_SL_BIT_MASK) <<
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HNS_ROCE_VLAN_SL_SHIFT;
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ah->av.port_pd = cpu_to_be32(to_hr_pd(ibpd)->pdn | (ah_attr->port_num <<
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HNS_ROCE_PORT_NUM_SHIFT));
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ah->av.gid_index = ah_attr->grh.sgid_index;
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ah->av.vlan = cpu_to_le16(vlan_tag);
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dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
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ah->av.vlan);
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if (ah_attr->static_rate)
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ah->av.stat_rate = IB_RATE_10_GBPS;
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memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, HNS_ROCE_GID_SIZE);
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ah->av.sl_tclass_flowlabel = cpu_to_le32(ah_attr->sl <<
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HNS_ROCE_SL_SHIFT);
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return &ah->ibah;
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}
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int hns_roce_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
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{
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struct hns_roce_ah *ah = to_hr_ah(ibah);
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memset(ah_attr, 0, sizeof(*ah_attr));
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ah_attr->sl = le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
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HNS_ROCE_SL_SHIFT;
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ah_attr->port_num = le32_to_cpu(ah->av.port_pd) >>
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HNS_ROCE_PORT_NUM_SHIFT;
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ah_attr->static_rate = ah->av.stat_rate;
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ah_attr->ah_flags = IB_AH_GRH;
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ah_attr->grh.traffic_class = le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
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HNS_ROCE_TCLASS_SHIFT;
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ah_attr->grh.flow_label = le32_to_cpu(ah->av.sl_tclass_flowlabel) &
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HNS_ROCE_FLOW_LABLE_MASK;
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ah_attr->grh.hop_limit = ah->av.hop_limit;
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ah_attr->grh.sgid_index = ah->av.gid_index;
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memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, HNS_ROCE_GID_SIZE);
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return 0;
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}
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int hns_roce_destroy_ah(struct ib_ah *ah)
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{
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kfree(to_hr_ah(ah));
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return 0;
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}
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