| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|---|
| 2 | /* |
| 3 | * Copyright (c) 2024, Microsoft Corporation. All rights reserved. |
| 4 | */ |
| 5 | |
| 6 | #include "mana_ib.h" |
| 7 | |
| 8 | int mana_ib_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *attr, |
| 9 | struct ib_udata *udata) |
| 10 | { |
| 11 | struct mana_ib_dev *mdev = container_of(ibah->device, struct mana_ib_dev, ib_dev); |
| 12 | struct mana_ib_ah *ah = container_of(ibah, struct mana_ib_ah, ibah); |
| 13 | struct rdma_ah_attr *ah_attr = attr->ah_attr; |
| 14 | const struct ib_global_route *grh; |
| 15 | enum rdma_network_type ntype; |
| 16 | |
| 17 | if (ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE || |
| 18 | !(rdma_ah_get_ah_flags(attr: ah_attr) & IB_AH_GRH)) |
| 19 | return -EINVAL; |
| 20 | |
| 21 | if (udata) |
| 22 | return -EINVAL; |
| 23 | |
| 24 | ah->av = dma_pool_zalloc(pool: mdev->av_pool, GFP_ATOMIC, handle: &ah->dma_handle); |
| 25 | if (!ah->av) |
| 26 | return -ENOMEM; |
| 27 | |
| 28 | grh = rdma_ah_read_grh(attr: ah_attr); |
| 29 | ntype = rdma_gid_attr_network_type(attr: grh->sgid_attr); |
| 30 | |
| 31 | copy_in_reverse(dst: ah->av->dest_mac, src: ah_attr->roce.dmac, ETH_ALEN); |
| 32 | ah->av->udp_src_port = rdma_flow_label_to_udp_sport(fl: grh->flow_label); |
| 33 | ah->av->hop_limit = grh->hop_limit; |
| 34 | ah->av->dscp = (grh->traffic_class >> 2) & 0x3f; |
| 35 | ah->av->is_ipv6 = (ntype == RDMA_NETWORK_IPV6); |
| 36 | |
| 37 | if (ah->av->is_ipv6) { |
| 38 | copy_in_reverse(dst: ah->av->dest_ip, src: grh->dgid.raw, size: 16); |
| 39 | copy_in_reverse(dst: ah->av->src_ip, src: grh->sgid_attr->gid.raw, size: 16); |
| 40 | } else { |
| 41 | ah->av->dest_ip[10] = 0xFF; |
| 42 | ah->av->dest_ip[11] = 0xFF; |
| 43 | copy_in_reverse(dst: &ah->av->dest_ip[12], src: &grh->dgid.raw[12], size: 4); |
| 44 | copy_in_reverse(dst: &ah->av->src_ip[12], src: &grh->sgid_attr->gid.raw[12], size: 4); |
| 45 | } |
| 46 | |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | int mana_ib_destroy_ah(struct ib_ah *ibah, u32 flags) |
| 51 | { |
| 52 | struct mana_ib_dev *mdev = container_of(ibah->device, struct mana_ib_dev, ib_dev); |
| 53 | struct mana_ib_ah *ah = container_of(ibah, struct mana_ib_ah, ibah); |
| 54 | |
| 55 | dma_pool_free(pool: mdev->av_pool, vaddr: ah->av, addr: ah->dma_handle); |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 |