2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/skbuff.h>
39 static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
42 if (unlikely(!qp->valid))
45 switch (qp_type(qp)) {
47 if (unlikely((pkt->opcode & IB_OPCODE_RC) != 0)) {
48 pr_warn_ratelimited("bad qp type\n");
53 if (unlikely(!(pkt->opcode & IB_OPCODE_UC))) {
54 pr_warn_ratelimited("bad qp type\n");
61 if (unlikely(!(pkt->opcode & IB_OPCODE_UD))) {
62 pr_warn_ratelimited("bad qp type\n");
67 pr_warn_ratelimited("unsupported qp type\n");
71 if (pkt->mask & RXE_REQ_MASK) {
72 if (unlikely(qp->resp.state != QP_STATE_READY))
74 } else if (unlikely(qp->req.state < QP_STATE_READY ||
75 qp->req.state > QP_STATE_DRAINED)) {
85 static void set_bad_pkey_cntr(struct rxe_port *port)
87 spin_lock_bh(&port->port_lock);
88 port->attr.bad_pkey_cntr = min((u32)0xffff,
89 port->attr.bad_pkey_cntr + 1);
90 spin_unlock_bh(&port->port_lock);
93 static void set_qkey_viol_cntr(struct rxe_port *port)
95 spin_lock_bh(&port->port_lock);
96 port->attr.qkey_viol_cntr = min((u32)0xffff,
97 port->attr.qkey_viol_cntr + 1);
98 spin_unlock_bh(&port->port_lock);
101 static int check_keys(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
102 u32 qpn, struct rxe_qp *qp)
106 struct rxe_port *port = &rxe->port;
107 u16 pkey = bth_pkey(pkt);
112 for (i = 0; i < port->attr.pkey_tbl_len; i++) {
113 if (pkey_match(pkey, port->pkey_tbl[i])) {
121 pr_warn_ratelimited("bad pkey = 0x%x\n", pkey);
122 set_bad_pkey_cntr(port);
126 if (unlikely(!pkey_match(pkey,
127 port->pkey_tbl[qp->attr.pkey_index]
129 pr_warn_ratelimited("bad pkey = 0x%0x\n", pkey);
130 set_bad_pkey_cntr(port);
133 pkt->pkey_index = qp->attr.pkey_index;
136 if ((qp_type(qp) == IB_QPT_UD || qp_type(qp) == IB_QPT_GSI) &&
138 u32 qkey = (qpn == 1) ? GSI_QKEY : qp->attr.qkey;
140 if (unlikely(deth_qkey(pkt) != qkey)) {
141 pr_warn_ratelimited("bad qkey, got 0x%x expected 0x%x for qpn 0x%x\n",
142 deth_qkey(pkt), qkey, qpn);
143 set_qkey_viol_cntr(port);
154 static int check_addr(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
157 struct sk_buff *skb = PKT_TO_SKB(pkt);
159 if (qp_type(qp) != IB_QPT_RC && qp_type(qp) != IB_QPT_UC)
162 if (unlikely(pkt->port_num != qp->attr.port_num)) {
163 pr_warn_ratelimited("port %d != qp port %d\n",
164 pkt->port_num, qp->attr.port_num);
168 if (skb->protocol == htons(ETH_P_IP)) {
169 struct in_addr *saddr =
170 &qp->pri_av.sgid_addr._sockaddr_in.sin_addr;
171 struct in_addr *daddr =
172 &qp->pri_av.dgid_addr._sockaddr_in.sin_addr;
174 if (ip_hdr(skb)->daddr != saddr->s_addr) {
175 pr_warn_ratelimited("dst addr %pI4 != qp source addr %pI4\n",
181 if (ip_hdr(skb)->saddr != daddr->s_addr) {
182 pr_warn_ratelimited("source addr %pI4 != qp dst addr %pI4\n",
188 } else if (skb->protocol == htons(ETH_P_IPV6)) {
189 struct in6_addr *saddr =
190 &qp->pri_av.sgid_addr._sockaddr_in6.sin6_addr;
191 struct in6_addr *daddr =
192 &qp->pri_av.dgid_addr._sockaddr_in6.sin6_addr;
194 if (memcmp(&ipv6_hdr(skb)->daddr, saddr, sizeof(*saddr))) {
195 pr_warn_ratelimited("dst addr %pI6 != qp source addr %pI6\n",
196 &ipv6_hdr(skb)->daddr, saddr);
200 if (memcmp(&ipv6_hdr(skb)->saddr, daddr, sizeof(*daddr))) {
201 pr_warn_ratelimited("source addr %pI6 != qp dst addr %pI6\n",
202 &ipv6_hdr(skb)->saddr, daddr);
214 static int hdr_check(struct rxe_pkt_info *pkt)
216 struct rxe_dev *rxe = pkt->rxe;
217 struct rxe_port *port = &rxe->port;
218 struct rxe_qp *qp = NULL;
219 u32 qpn = bth_qpn(pkt);
223 if (unlikely(bth_tver(pkt) != BTH_TVER)) {
224 pr_warn_ratelimited("bad tver\n");
228 if (unlikely(qpn == 0)) {
229 pr_warn_once("QP 0 not supported");
233 if (qpn != IB_MULTICAST_QPN) {
234 index = (qpn == 1) ? port->qp_gsi_index : qpn;
236 qp = rxe_pool_get_index(&rxe->qp_pool, index);
238 pr_warn_ratelimited("no qp matches qpn 0x%x\n", qpn);
242 err = check_type_state(rxe, pkt, qp);
246 err = check_addr(rxe, pkt, qp);
250 err = check_keys(rxe, pkt, qpn, qp);
254 if (unlikely((pkt->mask & RXE_GRH_MASK) == 0)) {
255 pr_warn_ratelimited("no grh for mcast qpn\n");
269 static inline void rxe_rcv_pkt(struct rxe_pkt_info *pkt, struct sk_buff *skb)
271 if (pkt->mask & RXE_REQ_MASK)
272 rxe_resp_queue_pkt(pkt->qp, skb);
274 rxe_comp_queue_pkt(pkt->qp, skb);
277 static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb)
279 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
280 struct rxe_mc_grp *mcg;
281 struct rxe_mc_elem *mce;
286 if (skb->protocol == htons(ETH_P_IP))
287 ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
288 (struct in6_addr *)&dgid);
289 else if (skb->protocol == htons(ETH_P_IPV6))
290 memcpy(&dgid, &ipv6_hdr(skb)->daddr, sizeof(dgid));
292 /* lookup mcast group corresponding to mgid, takes a ref */
293 mcg = rxe_pool_get_key(&rxe->mc_grp_pool, &dgid);
295 goto err1; /* mcast group not registered */
297 spin_lock_bh(&mcg->mcg_lock);
299 list_for_each_entry(mce, &mcg->qp_list, qp_list) {
301 pkt = SKB_TO_PKT(skb);
303 /* validate qp for incoming packet */
304 err = check_type_state(rxe, pkt, qp);
308 err = check_keys(rxe, pkt, bth_qpn(pkt), qp);
312 /* if *not* the last qp in the list
313 * increase the users of the skb then post to the next qp
315 if (mce->qp_list.next != &mcg->qp_list)
320 rxe_rcv_pkt(pkt, skb);
323 spin_unlock_bh(&mcg->mcg_lock);
325 rxe_drop_ref(mcg); /* drop ref from rxe_pool_get_key. */
331 static int rxe_match_dgid(struct rxe_dev *rxe, struct sk_buff *skb)
333 const struct ib_gid_attr *gid_attr;
337 if (skb->protocol == htons(ETH_P_IP)) {
338 ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
339 (struct in6_addr *)&dgid);
342 pdgid = (union ib_gid *)&ipv6_hdr(skb)->daddr;
345 gid_attr = rdma_find_gid_by_port(&rxe->ib_dev, pdgid,
346 IB_GID_TYPE_ROCE_UDP_ENCAP,
348 if (IS_ERR(gid_attr))
349 return PTR_ERR(gid_attr);
351 rdma_put_gid_attr(gid_attr);
355 /* rxe_rcv is called from the interface driver */
356 void rxe_rcv(struct sk_buff *skb)
359 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
360 struct rxe_dev *rxe = pkt->rxe;
362 u32 calc_icrc, pack_icrc;
366 if (unlikely(skb->len < pkt->offset + RXE_BTH_BYTES))
369 if (unlikely(rxe_match_dgid(rxe, skb) < 0)) {
370 pr_warn_ratelimited("failed matching dgid\n");
374 pkt->opcode = bth_opcode(pkt);
375 pkt->psn = bth_psn(pkt);
377 pkt->mask |= rxe_opcode[pkt->opcode].mask;
379 if (unlikely(skb->len < header_size(pkt)))
382 err = hdr_check(pkt);
387 icrcp = (__be32 *)(pkt->hdr + pkt->paylen - RXE_ICRC_SIZE);
388 pack_icrc = be32_to_cpu(*icrcp);
390 calc_icrc = rxe_icrc_hdr(pkt, skb);
391 calc_icrc = rxe_crc32(rxe, calc_icrc, (u8 *)payload_addr(pkt),
393 calc_icrc = (__force u32)cpu_to_be32(~calc_icrc);
394 if (unlikely(calc_icrc != pack_icrc)) {
395 if (skb->protocol == htons(ETH_P_IPV6))
396 pr_warn_ratelimited("bad ICRC from %pI6c\n",
397 &ipv6_hdr(skb)->saddr);
398 else if (skb->protocol == htons(ETH_P_IP))
399 pr_warn_ratelimited("bad ICRC from %pI4\n",
400 &ip_hdr(skb)->saddr);
402 pr_warn_ratelimited("bad ICRC from unknown\n");
407 rxe_counter_inc(rxe, RXE_CNT_RCVD_PKTS);
409 if (unlikely(bth_qpn(pkt) == IB_MULTICAST_QPN))
410 rxe_rcv_mcast_pkt(rxe, skb);
412 rxe_rcv_pkt(pkt, skb);
418 rxe_drop_ref(pkt->qp);