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df91c470d9
Implement create and destroy AH for kernel. In mana_ib, AV is passed as an sge in WQE. Allocate DMA memory and write an AV there. Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com> Link: https://patch.msgid.link/1737394039-28772-8-git-send-email-kotaranov@linux.microsoft.com Reviewed-by: Shiraz Saleem <shirazsaleem@microsoft.com> Reviewed-by: Long Li <longli@microsoft.com> Signed-off-by: Leon Romanovsky <leon@kernel.org>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2024, Microsoft Corporation. All rights reserved.
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*/
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#include "mana_ib.h"
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int mana_ib_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *attr,
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struct ib_udata *udata)
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{
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struct mana_ib_dev *mdev = container_of(ibah->device, struct mana_ib_dev, ib_dev);
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struct mana_ib_ah *ah = container_of(ibah, struct mana_ib_ah, ibah);
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struct rdma_ah_attr *ah_attr = attr->ah_attr;
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const struct ib_global_route *grh;
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enum rdma_network_type ntype;
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if (ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE ||
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!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
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return -EINVAL;
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if (udata)
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return -EINVAL;
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ah->av = dma_pool_zalloc(mdev->av_pool, GFP_ATOMIC, &ah->dma_handle);
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if (!ah->av)
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return -ENOMEM;
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grh = rdma_ah_read_grh(ah_attr);
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ntype = rdma_gid_attr_network_type(grh->sgid_attr);
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copy_in_reverse(ah->av->dest_mac, ah_attr->roce.dmac, ETH_ALEN);
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ah->av->udp_src_port = rdma_flow_label_to_udp_sport(grh->flow_label);
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ah->av->hop_limit = grh->hop_limit;
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ah->av->dscp = (grh->traffic_class >> 2) & 0x3f;
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ah->av->is_ipv6 = (ntype == RDMA_NETWORK_IPV6);
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if (ah->av->is_ipv6) {
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copy_in_reverse(ah->av->dest_ip, grh->dgid.raw, 16);
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copy_in_reverse(ah->av->src_ip, grh->sgid_attr->gid.raw, 16);
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} else {
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ah->av->dest_ip[10] = 0xFF;
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ah->av->dest_ip[11] = 0xFF;
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copy_in_reverse(&ah->av->dest_ip[12], &grh->dgid.raw[12], 4);
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copy_in_reverse(&ah->av->src_ip[12], &grh->sgid_attr->gid.raw[12], 4);
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}
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return 0;
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}
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int mana_ib_destroy_ah(struct ib_ah *ibah, u32 flags)
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{
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struct mana_ib_dev *mdev = container_of(ibah->device, struct mana_ib_dev, ib_dev);
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struct mana_ib_ah *ah = container_of(ibah, struct mana_ib_ah, ibah);
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dma_pool_free(mdev->av_pool, ah->av, ah->dma_handle);
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return 0;
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}
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