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Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_av.c')
-rw-r--r--drivers/infiniband/sw/rxe/rxe_av.c173
1 files changed, 173 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 0000000000..889d7adbd4
--- /dev/null
+++ b/drivers/infiniband/sw/rxe/rxe_av.c
@@ -0,0 +1,173 @@
+// 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);
+}
+
+static int chk_attr(void *obj, struct rdma_ah_attr *attr, bool obj_is_ah)
+{
+ const struct ib_global_route *grh = rdma_ah_read_grh(attr);
+ struct rxe_port *port;
+ struct rxe_dev *rxe;
+ struct rxe_qp *qp;
+ struct rxe_ah *ah;
+ int type;
+
+ if (obj_is_ah) {
+ ah = obj;
+ rxe = to_rdev(ah->ibah.device);
+ } else {
+ qp = obj;
+ rxe = to_rdev(qp->ibqp.device);
+ }
+
+ port = &rxe->port;
+
+ if (rdma_ah_get_ah_flags(attr) & IB_AH_GRH) {
+ if (grh->sgid_index > port->attr.gid_tbl_len) {
+ if (obj_is_ah)
+ rxe_dbg_ah(ah, "invalid sgid index = %d\n",
+ grh->sgid_index);
+ else
+ rxe_dbg_qp(qp, "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) {
+ if (obj_is_ah)
+ rxe_dbg_ah(ah, "invalid network type for rdma_rxe = %d\n",
+ type);
+ else
+ rxe_dbg_qp(qp, "invalid network type for rdma_rxe = %d\n",
+ type);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+int rxe_av_chk_attr(struct rxe_qp *qp, struct rdma_ah_attr *attr)
+{
+ return chk_attr(qp, attr, false);
+}
+
+int rxe_ah_chk_attr(struct rxe_ah *ah, struct rdma_ah_attr *attr)
+{
+ return chk_attr(ah, attr, true);
+}
+
+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) {
+ rxe_dbg_qp(pkt->qp, "Unable to find AH matching ah_num\n");
+ return NULL;
+ }
+
+ if (rxe_ah_pd(ah) != pkt->qp->pd) {
+ rxe_dbg_qp(pkt->qp, "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;
+}