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 /* check that QP matches packet opcode type and is in a valid state */
40 static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
43 unsigned int pkt_type;
45 if (unlikely(!qp->valid))
48 pkt_type = pkt->opcode & 0xe0;
50 switch (qp_type(qp)) {
52 if (unlikely(pkt_type != IB_OPCODE_RC)) {
53 pr_warn_ratelimited("bad qp type\n");
58 if (unlikely(pkt_type != IB_OPCODE_UC)) {
59 pr_warn_ratelimited("bad qp type\n");
66 if (unlikely(pkt_type != IB_OPCODE_UD)) {
67 pr_warn_ratelimited("bad qp type\n");
72 pr_warn_ratelimited("unsupported qp type\n");
76 if (pkt->mask & RXE_REQ_MASK) {
77 if (unlikely(qp->resp.state != QP_STATE_READY))
79 } else if (unlikely(qp->req.state < QP_STATE_READY ||
80 qp->req.state > QP_STATE_DRAINED)) {
90 static void set_bad_pkey_cntr(struct rxe_port *port)
92 spin_lock_bh(&port->port_lock);
93 port->attr.bad_pkey_cntr = min((u32)0xffff,
94 port->attr.bad_pkey_cntr + 1);
95 spin_unlock_bh(&port->port_lock);
98 static void set_qkey_viol_cntr(struct rxe_port *port)
100 spin_lock_bh(&port->port_lock);
101 port->attr.qkey_viol_cntr = min((u32)0xffff,
102 port->attr.qkey_viol_cntr + 1);
103 spin_unlock_bh(&port->port_lock);
106 static int check_keys(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
107 u32 qpn, struct rxe_qp *qp)
111 struct rxe_port *port = &rxe->port;
112 u16 pkey = bth_pkey(pkt);
117 for (i = 0; i < port->attr.pkey_tbl_len; i++) {
118 if (pkey_match(pkey, port->pkey_tbl[i])) {
126 pr_warn_ratelimited("bad pkey = 0x%x\n", pkey);
127 set_bad_pkey_cntr(port);
130 } else if (qpn != 0) {
131 if (unlikely(!pkey_match(pkey,
132 port->pkey_tbl[qp->attr.pkey_index]
134 pr_warn_ratelimited("bad pkey = 0x%0x\n", pkey);
135 set_bad_pkey_cntr(port);
138 pkt->pkey_index = qp->attr.pkey_index;
141 if ((qp_type(qp) == IB_QPT_UD || qp_type(qp) == IB_QPT_GSI) &&
142 qpn != 0 && pkt->mask) {
143 u32 qkey = (qpn == 1) ? GSI_QKEY : qp->attr.qkey;
145 if (unlikely(deth_qkey(pkt) != qkey)) {
146 pr_warn_ratelimited("bad qkey, got 0x%x expected 0x%x for qpn 0x%x\n",
147 deth_qkey(pkt), qkey, qpn);
148 set_qkey_viol_cntr(port);
159 static int check_addr(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
162 struct sk_buff *skb = PKT_TO_SKB(pkt);
164 if (qp_type(qp) != IB_QPT_RC && qp_type(qp) != IB_QPT_UC)
167 if (unlikely(pkt->port_num != qp->attr.port_num)) {
168 pr_warn_ratelimited("port %d != qp port %d\n",
169 pkt->port_num, qp->attr.port_num);
173 if (skb->protocol == htons(ETH_P_IP)) {
174 struct in_addr *saddr =
175 &qp->pri_av.sgid_addr._sockaddr_in.sin_addr;
176 struct in_addr *daddr =
177 &qp->pri_av.dgid_addr._sockaddr_in.sin_addr;
179 if (ip_hdr(skb)->daddr != saddr->s_addr) {
180 pr_warn_ratelimited("dst addr %pI4 != qp source addr %pI4\n",
186 if (ip_hdr(skb)->saddr != daddr->s_addr) {
187 pr_warn_ratelimited("source addr %pI4 != qp dst addr %pI4\n",
193 } else if (skb->protocol == htons(ETH_P_IPV6)) {
194 struct in6_addr *saddr =
195 &qp->pri_av.sgid_addr._sockaddr_in6.sin6_addr;
196 struct in6_addr *daddr =
197 &qp->pri_av.dgid_addr._sockaddr_in6.sin6_addr;
199 if (memcmp(&ipv6_hdr(skb)->daddr, saddr, sizeof(*saddr))) {
200 pr_warn_ratelimited("dst addr %pI6 != qp source addr %pI6\n",
201 &ipv6_hdr(skb)->daddr, saddr);
205 if (memcmp(&ipv6_hdr(skb)->saddr, daddr, sizeof(*daddr))) {
206 pr_warn_ratelimited("source addr %pI6 != qp dst addr %pI6\n",
207 &ipv6_hdr(skb)->saddr, daddr);
219 static int hdr_check(struct rxe_pkt_info *pkt)
221 struct rxe_dev *rxe = pkt->rxe;
222 struct rxe_port *port = &rxe->port;
223 struct rxe_qp *qp = NULL;
224 u32 qpn = bth_qpn(pkt);
228 if (unlikely(bth_tver(pkt) != BTH_TVER)) {
229 pr_warn_ratelimited("bad tver\n");
233 if (unlikely(qpn == 0)) {
234 pr_warn_once("QP 0 not supported");
238 if (qpn != IB_MULTICAST_QPN) {
239 index = (qpn == 1) ? port->qp_gsi_index : qpn;
241 qp = rxe_pool_get_index(&rxe->qp_pool, index);
243 pr_warn_ratelimited("no qp matches qpn 0x%x\n", qpn);
247 err = check_type_state(rxe, pkt, qp);
251 err = check_addr(rxe, pkt, qp);
255 err = check_keys(rxe, pkt, qpn, qp);
259 if (unlikely((pkt->mask & RXE_GRH_MASK) == 0)) {
260 pr_warn_ratelimited("no grh for mcast qpn\n");
275 static inline void rxe_rcv_pkt(struct rxe_dev *rxe,
276 struct rxe_pkt_info *pkt,
279 if (pkt->mask & RXE_REQ_MASK)
280 rxe_resp_queue_pkt(rxe, pkt->qp, skb);
282 rxe_comp_queue_pkt(rxe, pkt->qp, skb);
285 static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb)
287 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
288 struct rxe_mc_grp *mcg;
289 struct sk_buff *skb_copy;
290 struct rxe_mc_elem *mce;
295 if (skb->protocol == htons(ETH_P_IP))
296 ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
297 (struct in6_addr *)&dgid);
298 else if (skb->protocol == htons(ETH_P_IPV6))
299 memcpy(&dgid, &ipv6_hdr(skb)->daddr, sizeof(dgid));
301 /* lookup mcast group corresponding to mgid, takes a ref */
302 mcg = rxe_pool_get_key(&rxe->mc_grp_pool, &dgid);
304 goto err1; /* mcast group not registered */
306 spin_lock_bh(&mcg->mcg_lock);
308 list_for_each_entry(mce, &mcg->qp_list, qp_list) {
310 pkt = SKB_TO_PKT(skb);
312 /* validate qp for incoming packet */
313 err = check_type_state(rxe, pkt, qp);
317 err = check_keys(rxe, pkt, bth_qpn(pkt), qp);
321 /* if *not* the last qp in the list
322 * make a copy of the skb to post to the next qp
324 skb_copy = (mce->qp_list.next != &mcg->qp_list) ?
325 skb_clone(skb, GFP_ATOMIC) : NULL;
329 rxe_rcv_pkt(rxe, pkt, skb);
336 spin_unlock_bh(&mcg->mcg_lock);
338 rxe_drop_ref(mcg); /* drop ref from rxe_pool_get_key. */
345 static int rxe_match_dgid(struct rxe_dev *rxe, struct sk_buff *skb)
351 if (skb->protocol == htons(ETH_P_IP)) {
352 ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
353 (struct in6_addr *)&dgid);
356 pdgid = (union ib_gid *)&ipv6_hdr(skb)->daddr;
359 return ib_find_cached_gid_by_port(&rxe->ib_dev, pdgid,
360 IB_GID_TYPE_ROCE_UDP_ENCAP,
361 1, rxe->ndev, &index);
364 /* rxe_rcv is called from the interface driver */
365 int rxe_rcv(struct sk_buff *skb)
368 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
369 struct rxe_dev *rxe = pkt->rxe;
371 u32 calc_icrc, pack_icrc;
375 if (unlikely(skb->len < pkt->offset + RXE_BTH_BYTES))
378 if (unlikely(rxe_match_dgid(rxe, skb) < 0)) {
379 pr_warn_ratelimited("failed matching dgid\n");
383 pkt->opcode = bth_opcode(pkt);
384 pkt->psn = bth_psn(pkt);
386 pkt->mask |= rxe_opcode[pkt->opcode].mask;
388 if (unlikely(skb->len < header_size(pkt)))
391 err = hdr_check(pkt);
396 icrcp = (__be32 *)(pkt->hdr + pkt->paylen - RXE_ICRC_SIZE);
397 pack_icrc = be32_to_cpu(*icrcp);
399 calc_icrc = rxe_icrc_hdr(pkt, skb);
400 calc_icrc = crc32_le(calc_icrc, (u8 *)payload_addr(pkt),
402 calc_icrc = cpu_to_be32(~calc_icrc);
403 if (unlikely(calc_icrc != pack_icrc)) {
404 char saddr[sizeof(struct in6_addr)];
406 if (skb->protocol == htons(ETH_P_IPV6))
407 sprintf(saddr, "%pI6", &ipv6_hdr(skb)->saddr);
408 else if (skb->protocol == htons(ETH_P_IP))
409 sprintf(saddr, "%pI4", &ip_hdr(skb)->saddr);
411 sprintf(saddr, "unknown");
413 pr_warn_ratelimited("bad ICRC from %s\n", saddr);
417 if (unlikely(bth_qpn(pkt) == IB_MULTICAST_QPN))
418 rxe_rcv_mcast_pkt(rxe, skb);
420 rxe_rcv_pkt(rxe, pkt, skb);
426 rxe_drop_ref(pkt->qp);
431 EXPORT_SYMBOL(rxe_rcv);