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(ah_attr) & IB_AH_GRH)) 19 return -EINVAL; 20 21 if (udata) 22 return -EINVAL; 23 24 ah->av = dma_pool_zalloc(mdev->av_pool, GFP_ATOMIC, &ah->dma_handle); 25 if (!ah->av) 26 return -ENOMEM; 27 28 grh = rdma_ah_read_grh(ah_attr); 29 ntype = rdma_gid_attr_network_type(grh->sgid_attr); 30 31 copy_in_reverse(ah->av->dest_mac, ah_attr->roce.dmac, ETH_ALEN); 32 ah->av->udp_src_port = rdma_flow_label_to_udp_sport(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(ah->av->dest_ip, grh->dgid.raw, 16); 39 copy_in_reverse(ah->av->src_ip, grh->sgid_attr->gid.raw, 16); 40 } else { 41 ah->av->dest_ip[10] = 0xFF; 42 ah->av->dest_ip[11] = 0xFF; 43 copy_in_reverse(&ah->av->dest_ip[12], &grh->dgid.raw[12], 4); 44 copy_in_reverse(&ah->av->src_ip[12], &grh->sgid_attr->gid.raw[12], 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(mdev->av_pool, ah->av, ah->dma_handle); 56 57 return 0; 58 } 59