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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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225c7b1fee
Add an InfiniBand driver for Mellanox ConnectX adapters. Because
these adapters can also be used as ethernet NICs and Fibre Channel
HBAs, the driver is split into two modules:
mlx4_core: Handles low-level things like device initialization and
processing firmware commands. Also controls resource allocation
so that the InfiniBand, ethernet and FC functions can share a
device without stepping on each other.
mlx4_ib: Handles InfiniBand-specific things; plugs into the
InfiniBand midlayer.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
101 lines
3.4 KiB
C
101 lines
3.4 KiB
C
/*
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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 "mlx4_ib.h"
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struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
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{
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struct mlx4_dev *dev = to_mdev(pd->device)->dev;
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struct mlx4_ib_ah *ah;
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ah = kmalloc(sizeof *ah, GFP_ATOMIC);
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if (!ah)
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return ERR_PTR(-ENOMEM);
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memset(&ah->av, 0, sizeof ah->av);
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ah->av.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
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ah->av.g_slid = ah_attr->src_path_bits;
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ah->av.dlid = cpu_to_be16(ah_attr->dlid);
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if (ah_attr->static_rate) {
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ah->av.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
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while (ah->av.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
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!(1 << ah->av.stat_rate & dev->caps.stat_rate_support))
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--ah->av.stat_rate;
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}
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ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
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if (ah_attr->ah_flags & IB_AH_GRH) {
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ah->av.g_slid |= 0x80;
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ah->av.gid_index = ah_attr->grh.sgid_index;
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ah->av.hop_limit = ah_attr->grh.hop_limit;
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ah->av.sl_tclass_flowlabel |=
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cpu_to_be32((ah_attr->grh.traffic_class << 20) |
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ah_attr->grh.flow_label);
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memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16);
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}
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return &ah->ibah;
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}
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int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
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{
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struct mlx4_ib_ah *ah = to_mah(ibah);
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memset(ah_attr, 0, sizeof *ah_attr);
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ah_attr->dlid = be16_to_cpu(ah->av.dlid);
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ah_attr->sl = be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28;
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ah_attr->port_num = be32_to_cpu(ah->av.port_pd) >> 24;
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if (ah->av.stat_rate)
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ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET;
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ah_attr->src_path_bits = ah->av.g_slid & 0x7F;
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if (mlx4_ib_ah_grh_present(ah)) {
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ah_attr->ah_flags = IB_AH_GRH;
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ah_attr->grh.traffic_class =
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be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20;
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ah_attr->grh.flow_label =
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be32_to_cpu(ah->av.sl_tclass_flowlabel) & 0xfffff;
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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, 16);
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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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