diff options
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_av.c')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_av.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_av.c b/drivers/infiniband/sw/rxe/rxe_av.c new file mode 100644 index 000000000..3b05314ca --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_av.c @@ -0,0 +1,144 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + */ + +#include "rxe.h" +#include "rxe_loc.h" + +void rxe_init_av(struct rdma_ah_attr *attr, struct rxe_av *av) +{ + rxe_av_from_attr(rdma_ah_get_port_num(attr), av, attr); + rxe_av_fill_ip_info(av, attr); + memcpy(av->dmac, attr->roce.dmac, ETH_ALEN); +} + +int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr) +{ + const struct ib_global_route *grh = rdma_ah_read_grh(attr); + struct rxe_port *port; + int type; + + port = &rxe->port; + + if (rdma_ah_get_ah_flags(attr) & IB_AH_GRH) { + if (grh->sgid_index > port->attr.gid_tbl_len) { + pr_warn("invalid sgid index = %d\n", + grh->sgid_index); + return -EINVAL; + } + + type = rdma_gid_attr_network_type(grh->sgid_attr); + if (type < RDMA_NETWORK_IPV4 || + type > RDMA_NETWORK_IPV6) { + pr_warn("invalid network type for rdma_rxe = %d\n", + type); + return -EINVAL; + } + } + + return 0; +} + +void rxe_av_from_attr(u8 port_num, struct rxe_av *av, + struct rdma_ah_attr *attr) +{ + const struct ib_global_route *grh = rdma_ah_read_grh(attr); + + memset(av, 0, sizeof(*av)); + memcpy(av->grh.dgid.raw, grh->dgid.raw, sizeof(grh->dgid.raw)); + av->grh.flow_label = grh->flow_label; + av->grh.sgid_index = grh->sgid_index; + av->grh.hop_limit = grh->hop_limit; + av->grh.traffic_class = grh->traffic_class; + av->port_num = port_num; +} + +void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr) +{ + struct ib_global_route *grh = rdma_ah_retrieve_grh(attr); + + attr->type = RDMA_AH_ATTR_TYPE_ROCE; + + memcpy(grh->dgid.raw, av->grh.dgid.raw, sizeof(av->grh.dgid.raw)); + grh->flow_label = av->grh.flow_label; + grh->sgid_index = av->grh.sgid_index; + grh->hop_limit = av->grh.hop_limit; + grh->traffic_class = av->grh.traffic_class; + + rdma_ah_set_ah_flags(attr, IB_AH_GRH); + rdma_ah_set_port_num(attr, av->port_num); +} + +void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr) +{ + const struct ib_gid_attr *sgid_attr = attr->grh.sgid_attr; + int ibtype; + int type; + + rdma_gid2ip((struct sockaddr *)&av->sgid_addr, &sgid_attr->gid); + rdma_gid2ip((struct sockaddr *)&av->dgid_addr, + &rdma_ah_read_grh(attr)->dgid); + + ibtype = rdma_gid_attr_network_type(sgid_attr); + + switch (ibtype) { + case RDMA_NETWORK_IPV4: + type = RXE_NETWORK_TYPE_IPV4; + break; + case RDMA_NETWORK_IPV6: + type = RXE_NETWORK_TYPE_IPV6; + break; + default: + /* not reached - checked in rxe_av_chk_attr */ + type = 0; + break; + } + + av->network_type = type; +} + +struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt, struct rxe_ah **ahp) +{ + struct rxe_ah *ah; + u32 ah_num; + + if (ahp) + *ahp = NULL; + + if (!pkt || !pkt->qp) + return NULL; + + if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC) + return &pkt->qp->pri_av; + + if (!pkt->wqe) + return NULL; + + ah_num = pkt->wqe->wr.wr.ud.ah_num; + if (ah_num) { + /* only new user provider or kernel client */ + ah = rxe_pool_get_index(&pkt->rxe->ah_pool, ah_num); + if (!ah) { + pr_warn("Unable to find AH matching ah_num\n"); + return NULL; + } + + if (rxe_ah_pd(ah) != pkt->qp->pd) { + pr_warn("PDs don't match for AH and QP\n"); + rxe_put(ah); + return NULL; + } + + if (ahp) + *ahp = ah; + else + rxe_put(ah); + + return &ah->av; + } + + /* only old user provider for UD sends*/ + return &pkt->wqe->wr.wr.ud.av; +} |