]> Git Repo - J-linux.git/blob - drivers/net/ethernet/intel/ixgbevf/ipsec.c
Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / drivers / net / ethernet / intel / ixgbevf / ipsec.c
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2018 Oracle and/or its affiliates. All rights reserved. */
3
4 #include "ixgbevf.h"
5 #include <net/xfrm.h>
6 #include <crypto/aead.h>
7
8 #define IXGBE_IPSEC_KEY_BITS  160
9 static const char aes_gcm_name[] = "rfc4106(gcm(aes))";
10
11 /**
12  * ixgbevf_ipsec_set_pf_sa - ask the PF to set up an SA
13  * @adapter: board private structure
14  * @xs: xfrm info to be sent to the PF
15  *
16  * Returns: positive offload handle from the PF, or negative error code
17  **/
18 static int ixgbevf_ipsec_set_pf_sa(struct ixgbevf_adapter *adapter,
19                                    struct xfrm_state *xs)
20 {
21         u32 msgbuf[IXGBE_VFMAILBOX_SIZE] = { 0 };
22         struct ixgbe_hw *hw = &adapter->hw;
23         struct sa_mbx_msg *sam;
24         int ret;
25
26         /* send the important bits to the PF */
27         sam = (struct sa_mbx_msg *)(&msgbuf[1]);
28         sam->dir = xs->xso.dir;
29         sam->spi = xs->id.spi;
30         sam->proto = xs->id.proto;
31         sam->family = xs->props.family;
32
33         if (xs->props.family == AF_INET6)
34                 memcpy(sam->addr, &xs->id.daddr.a6, sizeof(xs->id.daddr.a6));
35         else
36                 memcpy(sam->addr, &xs->id.daddr.a4, sizeof(xs->id.daddr.a4));
37         memcpy(sam->key, xs->aead->alg_key, sizeof(sam->key));
38
39         msgbuf[0] = IXGBE_VF_IPSEC_ADD;
40
41         spin_lock_bh(&adapter->mbx_lock);
42
43         ret = ixgbevf_write_mbx(hw, msgbuf, IXGBE_VFMAILBOX_SIZE);
44         if (ret)
45                 goto out;
46
47         ret = ixgbevf_poll_mbx(hw, msgbuf, 2);
48         if (ret)
49                 goto out;
50
51         ret = (int)msgbuf[1];
52         if (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE && ret >= 0)
53                 ret = -1;
54
55 out:
56         spin_unlock_bh(&adapter->mbx_lock);
57
58         return ret;
59 }
60
61 /**
62  * ixgbevf_ipsec_del_pf_sa - ask the PF to delete an SA
63  * @adapter: board private structure
64  * @pfsa: sa index returned from PF when created, -1 for all
65  *
66  * Returns: 0 on success, or negative error code
67  **/
68 static int ixgbevf_ipsec_del_pf_sa(struct ixgbevf_adapter *adapter, int pfsa)
69 {
70         struct ixgbe_hw *hw = &adapter->hw;
71         u32 msgbuf[2];
72         int err;
73
74         memset(msgbuf, 0, sizeof(msgbuf));
75         msgbuf[0] = IXGBE_VF_IPSEC_DEL;
76         msgbuf[1] = (u32)pfsa;
77
78         spin_lock_bh(&adapter->mbx_lock);
79
80         err = ixgbevf_write_mbx(hw, msgbuf, 2);
81         if (err)
82                 goto out;
83
84         err = ixgbevf_poll_mbx(hw, msgbuf, 2);
85         if (err)
86                 goto out;
87
88 out:
89         spin_unlock_bh(&adapter->mbx_lock);
90         return err;
91 }
92
93 /**
94  * ixgbevf_ipsec_restore - restore the IPsec HW settings after a reset
95  * @adapter: board private structure
96  *
97  * Reload the HW tables from the SW tables after they've been bashed
98  * by a chip reset.  While we're here, make sure any stale VF data is
99  * removed, since we go through reset when num_vfs changes.
100  **/
101 void ixgbevf_ipsec_restore(struct ixgbevf_adapter *adapter)
102 {
103         struct ixgbevf_ipsec *ipsec = adapter->ipsec;
104         struct net_device *netdev = adapter->netdev;
105         int i;
106
107         if (!(adapter->netdev->features & NETIF_F_HW_ESP))
108                 return;
109
110         /* reload the Rx and Tx keys */
111         for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {
112                 struct rx_sa *r = &ipsec->rx_tbl[i];
113                 struct tx_sa *t = &ipsec->tx_tbl[i];
114                 int ret;
115
116                 if (r->used) {
117                         ret = ixgbevf_ipsec_set_pf_sa(adapter, r->xs);
118                         if (ret < 0)
119                                 netdev_err(netdev, "reload rx_tbl[%d] failed = %d\n",
120                                            i, ret);
121                 }
122
123                 if (t->used) {
124                         ret = ixgbevf_ipsec_set_pf_sa(adapter, t->xs);
125                         if (ret < 0)
126                                 netdev_err(netdev, "reload tx_tbl[%d] failed = %d\n",
127                                            i, ret);
128                 }
129         }
130 }
131
132 /**
133  * ixgbevf_ipsec_find_empty_idx - find the first unused security parameter index
134  * @ipsec: pointer to IPsec struct
135  * @rxtable: true if we need to look in the Rx table
136  *
137  * Returns the first unused index in either the Rx or Tx SA table
138  **/
139 static
140 int ixgbevf_ipsec_find_empty_idx(struct ixgbevf_ipsec *ipsec, bool rxtable)
141 {
142         u32 i;
143
144         if (rxtable) {
145                 if (ipsec->num_rx_sa == IXGBE_IPSEC_MAX_SA_COUNT)
146                         return -ENOSPC;
147
148                 /* search rx sa table */
149                 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {
150                         if (!ipsec->rx_tbl[i].used)
151                                 return i;
152                 }
153         } else {
154                 if (ipsec->num_tx_sa == IXGBE_IPSEC_MAX_SA_COUNT)
155                         return -ENOSPC;
156
157                 /* search tx sa table */
158                 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {
159                         if (!ipsec->tx_tbl[i].used)
160                                 return i;
161                 }
162         }
163
164         return -ENOSPC;
165 }
166
167 /**
168  * ixgbevf_ipsec_find_rx_state - find the state that matches
169  * @ipsec: pointer to IPsec struct
170  * @daddr: inbound address to match
171  * @proto: protocol to match
172  * @spi: SPI to match
173  * @ip4: true if using an IPv4 address
174  *
175  * Returns a pointer to the matching SA state information
176  **/
177 static
178 struct xfrm_state *ixgbevf_ipsec_find_rx_state(struct ixgbevf_ipsec *ipsec,
179                                                __be32 *daddr, u8 proto,
180                                                __be32 spi, bool ip4)
181 {
182         struct xfrm_state *ret = NULL;
183         struct rx_sa *rsa;
184
185         rcu_read_lock();
186         hash_for_each_possible_rcu(ipsec->rx_sa_list, rsa, hlist,
187                                    (__force u32)spi) {
188                 if (spi == rsa->xs->id.spi &&
189                     ((ip4 && *daddr == rsa->xs->id.daddr.a4) ||
190                       (!ip4 && !memcmp(daddr, &rsa->xs->id.daddr.a6,
191                                        sizeof(rsa->xs->id.daddr.a6)))) &&
192                     proto == rsa->xs->id.proto) {
193                         ret = rsa->xs;
194                         xfrm_state_hold(ret);
195                         break;
196                 }
197         }
198         rcu_read_unlock();
199         return ret;
200 }
201
202 /**
203  * ixgbevf_ipsec_parse_proto_keys - find the key and salt based on the protocol
204  * @xs: pointer to xfrm_state struct
205  * @mykey: pointer to key array to populate
206  * @mysalt: pointer to salt value to populate
207  *
208  * This copies the protocol keys and salt to our own data tables.  The
209  * 82599 family only supports the one algorithm.
210  **/
211 static int ixgbevf_ipsec_parse_proto_keys(struct xfrm_state *xs,
212                                           u32 *mykey, u32 *mysalt)
213 {
214         struct net_device *dev = xs->xso.real_dev;
215         unsigned char *key_data;
216         char *alg_name = NULL;
217         int key_len;
218
219         if (!xs->aead) {
220                 netdev_err(dev, "Unsupported IPsec algorithm\n");
221                 return -EINVAL;
222         }
223
224         if (xs->aead->alg_icv_len != IXGBE_IPSEC_AUTH_BITS) {
225                 netdev_err(dev, "IPsec offload requires %d bit authentication\n",
226                            IXGBE_IPSEC_AUTH_BITS);
227                 return -EINVAL;
228         }
229
230         key_data = &xs->aead->alg_key[0];
231         key_len = xs->aead->alg_key_len;
232         alg_name = xs->aead->alg_name;
233
234         if (strcmp(alg_name, aes_gcm_name)) {
235                 netdev_err(dev, "Unsupported IPsec algorithm - please use %s\n",
236                            aes_gcm_name);
237                 return -EINVAL;
238         }
239
240         /* The key bytes come down in a big endian array of bytes, so
241          * we don't need to do any byte swapping.
242          * 160 accounts for 16 byte key and 4 byte salt
243          */
244         if (key_len > IXGBE_IPSEC_KEY_BITS) {
245                 *mysalt = ((u32 *)key_data)[4];
246         } else if (key_len == IXGBE_IPSEC_KEY_BITS) {
247                 *mysalt = 0;
248         } else {
249                 netdev_err(dev, "IPsec hw offload only supports keys up to 128 bits with a 32 bit salt\n");
250                 return -EINVAL;
251         }
252         memcpy(mykey, key_data, 16);
253
254         return 0;
255 }
256
257 /**
258  * ixgbevf_ipsec_add_sa - program device with a security association
259  * @xs: pointer to transformer state struct
260  * @extack: extack point to fill failure reason
261  **/
262 static int ixgbevf_ipsec_add_sa(struct xfrm_state *xs,
263                                 struct netlink_ext_ack *extack)
264 {
265         struct net_device *dev = xs->xso.real_dev;
266         struct ixgbevf_adapter *adapter;
267         struct ixgbevf_ipsec *ipsec;
268         u16 sa_idx;
269         int ret;
270
271         adapter = netdev_priv(dev);
272         ipsec = adapter->ipsec;
273
274         if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) {
275                 NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol for IPsec offload");
276                 return -EINVAL;
277         }
278
279         if (xs->props.mode != XFRM_MODE_TRANSPORT) {
280                 NL_SET_ERR_MSG_MOD(extack, "Unsupported mode for ipsec offload");
281                 return -EINVAL;
282         }
283
284         if (xs->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) {
285                 NL_SET_ERR_MSG_MOD(extack, "Unsupported ipsec offload type");
286                 return -EINVAL;
287         }
288
289         if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) {
290                 struct rx_sa rsa;
291
292                 if (xs->calg) {
293                         NL_SET_ERR_MSG_MOD(extack, "Compression offload not supported");
294                         return -EINVAL;
295                 }
296
297                 /* find the first unused index */
298                 ret = ixgbevf_ipsec_find_empty_idx(ipsec, true);
299                 if (ret < 0) {
300                         NL_SET_ERR_MSG_MOD(extack, "No space for SA in Rx table!");
301                         return ret;
302                 }
303                 sa_idx = (u16)ret;
304
305                 memset(&rsa, 0, sizeof(rsa));
306                 rsa.used = true;
307                 rsa.xs = xs;
308
309                 if (rsa.xs->id.proto & IPPROTO_ESP)
310                         rsa.decrypt = xs->ealg || xs->aead;
311
312                 /* get the key and salt */
313                 ret = ixgbevf_ipsec_parse_proto_keys(xs, rsa.key, &rsa.salt);
314                 if (ret) {
315                         NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for Rx SA table");
316                         return ret;
317                 }
318
319                 /* get ip for rx sa table */
320                 if (xs->props.family == AF_INET6)
321                         memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16);
322                 else
323                         memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4);
324
325                 rsa.mode = IXGBE_RXMOD_VALID;
326                 if (rsa.xs->id.proto & IPPROTO_ESP)
327                         rsa.mode |= IXGBE_RXMOD_PROTO_ESP;
328                 if (rsa.decrypt)
329                         rsa.mode |= IXGBE_RXMOD_DECRYPT;
330                 if (rsa.xs->props.family == AF_INET6)
331                         rsa.mode |= IXGBE_RXMOD_IPV6;
332
333                 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs);
334                 if (ret < 0)
335                         return ret;
336                 rsa.pfsa = ret;
337
338                 /* the preparations worked, so save the info */
339                 memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa));
340
341                 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX;
342
343                 ipsec->num_rx_sa++;
344
345                 /* hash the new entry for faster search in Rx path */
346                 hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist,
347                              (__force u32)rsa.xs->id.spi);
348         } else {
349                 struct tx_sa tsa;
350
351                 /* find the first unused index */
352                 ret = ixgbevf_ipsec_find_empty_idx(ipsec, false);
353                 if (ret < 0) {
354                         NL_SET_ERR_MSG_MOD(extack, "No space for SA in Tx table");
355                         return ret;
356                 }
357                 sa_idx = (u16)ret;
358
359                 memset(&tsa, 0, sizeof(tsa));
360                 tsa.used = true;
361                 tsa.xs = xs;
362
363                 if (xs->id.proto & IPPROTO_ESP)
364                         tsa.encrypt = xs->ealg || xs->aead;
365
366                 ret = ixgbevf_ipsec_parse_proto_keys(xs, tsa.key, &tsa.salt);
367                 if (ret) {
368                         NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for Tx SA table");
369                         memset(&tsa, 0, sizeof(tsa));
370                         return ret;
371                 }
372
373                 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs);
374                 if (ret < 0)
375                         return ret;
376                 tsa.pfsa = ret;
377
378                 /* the preparations worked, so save the info */
379                 memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa));
380
381                 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX;
382
383                 ipsec->num_tx_sa++;
384         }
385
386         return 0;
387 }
388
389 /**
390  * ixgbevf_ipsec_del_sa - clear out this specific SA
391  * @xs: pointer to transformer state struct
392  **/
393 static void ixgbevf_ipsec_del_sa(struct xfrm_state *xs)
394 {
395         struct net_device *dev = xs->xso.real_dev;
396         struct ixgbevf_adapter *adapter;
397         struct ixgbevf_ipsec *ipsec;
398         u16 sa_idx;
399
400         adapter = netdev_priv(dev);
401         ipsec = adapter->ipsec;
402
403         if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) {
404                 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX;
405
406                 if (!ipsec->rx_tbl[sa_idx].used) {
407                         netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n",
408                                    sa_idx, xs->xso.offload_handle);
409                         return;
410                 }
411
412                 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->rx_tbl[sa_idx].pfsa);
413                 hash_del_rcu(&ipsec->rx_tbl[sa_idx].hlist);
414                 memset(&ipsec->rx_tbl[sa_idx], 0, sizeof(struct rx_sa));
415                 ipsec->num_rx_sa--;
416         } else {
417                 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX;
418
419                 if (!ipsec->tx_tbl[sa_idx].used) {
420                         netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n",
421                                    sa_idx, xs->xso.offload_handle);
422                         return;
423                 }
424
425                 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->tx_tbl[sa_idx].pfsa);
426                 memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa));
427                 ipsec->num_tx_sa--;
428         }
429 }
430
431 /**
432  * ixgbevf_ipsec_offload_ok - can this packet use the xfrm hw offload
433  * @skb: current data packet
434  * @xs: pointer to transformer state struct
435  **/
436 static bool ixgbevf_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)
437 {
438         if (xs->props.family == AF_INET) {
439                 /* Offload with IPv4 options is not supported yet */
440                 if (ip_hdr(skb)->ihl != 5)
441                         return false;
442         } else {
443                 /* Offload with IPv6 extension headers is not support yet */
444                 if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr))
445                         return false;
446         }
447
448         return true;
449 }
450
451 static const struct xfrmdev_ops ixgbevf_xfrmdev_ops = {
452         .xdo_dev_state_add = ixgbevf_ipsec_add_sa,
453         .xdo_dev_state_delete = ixgbevf_ipsec_del_sa,
454         .xdo_dev_offload_ok = ixgbevf_ipsec_offload_ok,
455 };
456
457 /**
458  * ixgbevf_ipsec_tx - setup Tx flags for IPsec offload
459  * @tx_ring: outgoing context
460  * @first: current data packet
461  * @itd: ipsec Tx data for later use in building context descriptor
462  **/
463 int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring,
464                      struct ixgbevf_tx_buffer *first,
465                      struct ixgbevf_ipsec_tx_data *itd)
466 {
467         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
468         struct ixgbevf_ipsec *ipsec = adapter->ipsec;
469         struct xfrm_state *xs;
470         struct sec_path *sp;
471         struct tx_sa *tsa;
472         u16 sa_idx;
473
474         sp = skb_sec_path(first->skb);
475         if (unlikely(!sp->len)) {
476                 netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n",
477                            __func__, sp->len);
478                 return 0;
479         }
480
481         xs = xfrm_input_state(first->skb);
482         if (unlikely(!xs)) {
483                 netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n",
484                            __func__, xs);
485                 return 0;
486         }
487
488         sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX;
489         if (unlikely(sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) {
490                 netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n",
491                            __func__, sa_idx, xs->xso.offload_handle);
492                 return 0;
493         }
494
495         tsa = &ipsec->tx_tbl[sa_idx];
496         if (unlikely(!tsa->used)) {
497                 netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n",
498                            __func__, sa_idx);
499                 return 0;
500         }
501
502         itd->pfsa = tsa->pfsa - IXGBE_IPSEC_BASE_TX_INDEX;
503
504         first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CSUM;
505
506         if (xs->id.proto == IPPROTO_ESP) {
507                 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP |
508                               IXGBE_ADVTXD_TUCMD_L4T_TCP;
509                 if (first->protocol == htons(ETH_P_IP))
510                         itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4;
511
512                 /* The actual trailer length is authlen (16 bytes) plus
513                  * 2 bytes for the proto and the padlen values, plus
514                  * padlen bytes of padding.  This ends up not the same
515                  * as the static value found in xs->props.trailer_len (21).
516                  *
517                  * ... but if we're doing GSO, don't bother as the stack
518                  * doesn't add a trailer for those.
519                  */
520                 if (!skb_is_gso(first->skb)) {
521                         /* The "correct" way to get the auth length would be
522                          * to use
523                          *    authlen = crypto_aead_authsize(xs->data);
524                          * but since we know we only have one size to worry
525                          * about * we can let the compiler use the constant
526                          * and save us a few CPU cycles.
527                          */
528                         const int authlen = IXGBE_IPSEC_AUTH_BITS / 8;
529                         struct sk_buff *skb = first->skb;
530                         u8 padlen;
531                         int ret;
532
533                         ret = skb_copy_bits(skb, skb->len - (authlen + 2),
534                                             &padlen, 1);
535                         if (unlikely(ret))
536                                 return 0;
537                         itd->trailer_len = authlen + 2 + padlen;
538                 }
539         }
540         if (tsa->encrypt)
541                 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN;
542
543         return 1;
544 }
545
546 /**
547  * ixgbevf_ipsec_rx - decode IPsec bits from Rx descriptor
548  * @rx_ring: receiving ring
549  * @rx_desc: receive data descriptor
550  * @skb: current data packet
551  *
552  * Determine if there was an IPsec encapsulation noticed, and if so set up
553  * the resulting status for later in the receive stack.
554  **/
555 void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring,
556                       union ixgbe_adv_rx_desc *rx_desc,
557                       struct sk_buff *skb)
558 {
559         struct ixgbevf_adapter *adapter = netdev_priv(rx_ring->netdev);
560         __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
561         __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH |
562                                              IXGBE_RXDADV_PKTTYPE_IPSEC_ESP);
563         struct ixgbevf_ipsec *ipsec = adapter->ipsec;
564         struct xfrm_offload *xo = NULL;
565         struct xfrm_state *xs = NULL;
566         struct ipv6hdr *ip6 = NULL;
567         struct iphdr *ip4 = NULL;
568         struct sec_path *sp;
569         void *daddr;
570         __be32 spi;
571         u8 *c_hdr;
572         u8 proto;
573
574         /* Find the IP and crypto headers in the data.
575          * We can assume no VLAN header in the way, b/c the
576          * hw won't recognize the IPsec packet and anyway the
577          * currently VLAN device doesn't support xfrm offload.
578          */
579         if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) {
580                 ip4 = (struct iphdr *)(skb->data + ETH_HLEN);
581                 daddr = &ip4->daddr;
582                 c_hdr = (u8 *)ip4 + ip4->ihl * 4;
583         } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) {
584                 ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN);
585                 daddr = &ip6->daddr;
586                 c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr);
587         } else {
588                 return;
589         }
590
591         switch (pkt_info & ipsec_pkt_types) {
592         case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH):
593                 spi = ((struct ip_auth_hdr *)c_hdr)->spi;
594                 proto = IPPROTO_AH;
595                 break;
596         case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP):
597                 spi = ((struct ip_esp_hdr *)c_hdr)->spi;
598                 proto = IPPROTO_ESP;
599                 break;
600         default:
601                 return;
602         }
603
604         xs = ixgbevf_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4);
605         if (unlikely(!xs))
606                 return;
607
608         sp = secpath_set(skb);
609         if (unlikely(!sp))
610                 return;
611
612         sp->xvec[sp->len++] = xs;
613         sp->olen++;
614         xo = xfrm_offload(skb);
615         xo->flags = CRYPTO_DONE;
616         xo->status = CRYPTO_SUCCESS;
617
618         adapter->rx_ipsec++;
619 }
620
621 /**
622  * ixgbevf_init_ipsec_offload - initialize registers for IPsec operation
623  * @adapter: board private structure
624  **/
625 void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter)
626 {
627         struct ixgbevf_ipsec *ipsec;
628         size_t size;
629
630         switch (adapter->hw.api_version) {
631         case ixgbe_mbox_api_14:
632                 break;
633         default:
634                 return;
635         }
636
637         ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL);
638         if (!ipsec)
639                 goto err1;
640         hash_init(ipsec->rx_sa_list);
641
642         size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT;
643         ipsec->rx_tbl = kzalloc(size, GFP_KERNEL);
644         if (!ipsec->rx_tbl)
645                 goto err2;
646
647         size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT;
648         ipsec->tx_tbl = kzalloc(size, GFP_KERNEL);
649         if (!ipsec->tx_tbl)
650                 goto err2;
651
652         ipsec->num_rx_sa = 0;
653         ipsec->num_tx_sa = 0;
654
655         adapter->ipsec = ipsec;
656
657         adapter->netdev->xfrmdev_ops = &ixgbevf_xfrmdev_ops;
658
659 #define IXGBEVF_ESP_FEATURES    (NETIF_F_HW_ESP | \
660                                  NETIF_F_HW_ESP_TX_CSUM | \
661                                  NETIF_F_GSO_ESP)
662
663         adapter->netdev->features |= IXGBEVF_ESP_FEATURES;
664         adapter->netdev->hw_enc_features |= IXGBEVF_ESP_FEATURES;
665
666         return;
667
668 err2:
669         kfree(ipsec->rx_tbl);
670         kfree(ipsec->tx_tbl);
671         kfree(ipsec);
672 err1:
673         netdev_err(adapter->netdev, "Unable to allocate memory for SA tables");
674 }
675
676 /**
677  * ixgbevf_stop_ipsec_offload - tear down the IPsec offload
678  * @adapter: board private structure
679  **/
680 void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter)
681 {
682         struct ixgbevf_ipsec *ipsec = adapter->ipsec;
683
684         adapter->ipsec = NULL;
685         if (ipsec) {
686                 kfree(ipsec->rx_tbl);
687                 kfree(ipsec->tx_tbl);
688                 kfree(ipsec);
689         }
690 }
This page took 0.067621 seconds and 4 git commands to generate.