1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (C) 2020 Chelsio Communications. All rights reserved. */
3
4 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
5
6 #include <linux/skbuff.h>
7 #include <linux/module.h>
8 #include <linux/highmem.h>
9 #include <linux/ip.h>
10 #include <net/ipv6.h>
11 #include <linux/netdevice.h>
12 #include <crypto/aes.h>
13 #include "chcr_ktls.h"
14
15 static LIST_HEAD(uld_ctx_list);
16 static DEFINE_MUTEX(dev_mutex);
17
18 /* chcr_get_nfrags_to_send: get the remaining nfrags after start offset
19 * @skb: skb
20 * @start: start offset.
21 * @len: how much data to send after @start
22 */
chcr_get_nfrags_to_send(struct sk_buff * skb,u32 start,u32 len)23 static int chcr_get_nfrags_to_send(struct sk_buff *skb, u32 start, u32 len)
24 {
25 struct skb_shared_info *si = skb_shinfo(skb);
26 u32 frag_size, skb_linear_data_len = skb_headlen(skb);
27 u8 nfrags = 0, frag_idx = 0;
28 skb_frag_t *frag;
29
30 /* if its a linear skb then return 1 */
31 if (!skb_is_nonlinear(skb))
32 return 1;
33
34 if (unlikely(start < skb_linear_data_len)) {
35 frag_size = min(len, skb_linear_data_len - start);
36 } else {
37 start -= skb_linear_data_len;
38
39 frag = &si->frags[frag_idx];
40 frag_size = skb_frag_size(frag);
41 while (start >= frag_size) {
42 start -= frag_size;
43 frag_idx++;
44 frag = &si->frags[frag_idx];
45 frag_size = skb_frag_size(frag);
46 }
47 frag_size = min(len, skb_frag_size(frag) - start);
48 }
49 len -= frag_size;
50 nfrags++;
51
52 while (len) {
53 frag_size = min(len, skb_frag_size(&si->frags[frag_idx]));
54 len -= frag_size;
55 nfrags++;
56 frag_idx++;
57 }
58 return nfrags;
59 }
60
61 static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info);
62 static void clear_conn_resources(struct chcr_ktls_info *tx_info);
63 /*
64 * chcr_ktls_save_keys: calculate and save crypto keys.
65 * @tx_info - driver specific tls info.
66 * @crypto_info - tls crypto information.
67 * @direction - TX/RX direction.
68 * return - SUCCESS/FAILURE.
69 */
chcr_ktls_save_keys(struct chcr_ktls_info * tx_info,struct tls_crypto_info * crypto_info,enum tls_offload_ctx_dir direction)70 static int chcr_ktls_save_keys(struct chcr_ktls_info *tx_info,
71 struct tls_crypto_info *crypto_info,
72 enum tls_offload_ctx_dir direction)
73 {
74 int ck_size, key_ctx_size, mac_key_size, keylen, ghash_size, ret;
75 unsigned char ghash_h[TLS_CIPHER_AES_GCM_256_TAG_SIZE];
76 struct tls12_crypto_info_aes_gcm_128 *info_128_gcm;
77 struct ktls_key_ctx *kctx = &tx_info->key_ctx;
78 struct crypto_aes_ctx aes_ctx;
79 unsigned char *key, *salt;
80
81 switch (crypto_info->cipher_type) {
82 case TLS_CIPHER_AES_GCM_128:
83 info_128_gcm =
84 (struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
85 keylen = TLS_CIPHER_AES_GCM_128_KEY_SIZE;
86 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128;
87 tx_info->salt_size = TLS_CIPHER_AES_GCM_128_SALT_SIZE;
88 mac_key_size = CHCR_KEYCTX_MAC_KEY_SIZE_128;
89 tx_info->iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE;
90 tx_info->iv = be64_to_cpu(*(__be64 *)info_128_gcm->iv);
91
92 ghash_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE;
93 key = info_128_gcm->key;
94 salt = info_128_gcm->salt;
95 tx_info->record_no = *(u64 *)info_128_gcm->rec_seq;
96
97 /* The SCMD fields used when encrypting a full TLS
98 * record. Its a one time calculation till the
99 * connection exists.
100 */
101 tx_info->scmd0_seqno_numivs =
102 SCMD_SEQ_NO_CTRL_V(CHCR_SCMD_SEQ_NO_CTRL_64BIT) |
103 SCMD_CIPH_AUTH_SEQ_CTRL_F |
104 SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_TLS) |
105 SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_GCM) |
106 SCMD_AUTH_MODE_V(CHCR_SCMD_AUTH_MODE_GHASH) |
107 SCMD_IV_SIZE_V(TLS_CIPHER_AES_GCM_128_IV_SIZE >> 1) |
108 SCMD_NUM_IVS_V(1);
109
110 /* keys will be sent inline. */
111 tx_info->scmd0_ivgen_hdrlen = SCMD_KEY_CTX_INLINE_F;
112
113 /* The SCMD fields used when encrypting a partial TLS
114 * record (no trailer and possibly a truncated payload).
115 */
116 tx_info->scmd0_short_seqno_numivs =
117 SCMD_CIPH_AUTH_SEQ_CTRL_F |
118 SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_GENERIC) |
119 SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_CTR) |
120 SCMD_IV_SIZE_V(AES_BLOCK_LEN >> 1);
121
122 tx_info->scmd0_short_ivgen_hdrlen =
123 tx_info->scmd0_ivgen_hdrlen | SCMD_AADIVDROP_F;
124
125 break;
126
127 default:
128 pr_err("GCM: cipher type 0x%x not supported\n",
129 crypto_info->cipher_type);
130 ret = -EINVAL;
131 goto out;
132 }
133
134 key_ctx_size = CHCR_KTLS_KEY_CTX_LEN +
135 roundup(keylen, 16) + ghash_size;
136 /* Calculate the H = CIPH(K, 0 repeated 16 times).
137 * It will go in key context
138 */
139
140 ret = aes_expandkey(&aes_ctx, key, keylen);
141 if (ret)
142 goto out;
143
144 memset(ghash_h, 0, ghash_size);
145 aes_encrypt(&aes_ctx, ghash_h, ghash_h);
146 memzero_explicit(&aes_ctx, sizeof(aes_ctx));
147
148 /* fill the Key context */
149 if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
150 kctx->ctx_hdr = FILL_KEY_CTX_HDR(ck_size,
151 mac_key_size,
152 key_ctx_size >> 4);
153 } else {
154 ret = -EINVAL;
155 goto out;
156 }
157
158 memcpy(kctx->salt, salt, tx_info->salt_size);
159 memcpy(kctx->key, key, keylen);
160 memcpy(kctx->key + keylen, ghash_h, ghash_size);
161 tx_info->key_ctx_len = key_ctx_size;
162
163 out:
164 return ret;
165 }
166
167 /*
168 * chcr_ktls_act_open_req: creates TCB entry for ipv4 connection.
169 * @sk - tcp socket.
170 * @tx_info - driver specific tls info.
171 * @atid - connection active tid.
172 * return - send success/failure.
173 */
chcr_ktls_act_open_req(struct sock * sk,struct chcr_ktls_info * tx_info,int atid)174 static int chcr_ktls_act_open_req(struct sock *sk,
175 struct chcr_ktls_info *tx_info,
176 int atid)
177 {
178 struct inet_sock *inet = inet_sk(sk);
179 struct cpl_t6_act_open_req *cpl6;
180 struct cpl_act_open_req *cpl;
181 struct sk_buff *skb;
182 unsigned int len;
183 int qid_atid;
184 u64 options;
185
186 len = sizeof(*cpl6);
187 skb = alloc_skb(len, GFP_KERNEL);
188 if (unlikely(!skb))
189 return -ENOMEM;
190 /* mark it a control pkt */
191 set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id);
192
193 cpl6 = __skb_put_zero(skb, len);
194 cpl = (struct cpl_act_open_req *)cpl6;
195 INIT_TP_WR(cpl6, 0);
196 qid_atid = TID_QID_V(tx_info->rx_qid) |
197 TID_TID_V(atid);
198 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, qid_atid));
199 cpl->local_port = inet->inet_sport;
200 cpl->peer_port = inet->inet_dport;
201 cpl->local_ip = inet->inet_rcv_saddr;
202 cpl->peer_ip = inet->inet_daddr;
203
204 /* fill first 64 bit option field. */
205 options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F |
206 SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan);
207 cpl->opt0 = cpu_to_be64(options);
208
209 /* next 64 bit option field. */
210 options =
211 TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]);
212 cpl->opt2 = htonl(options);
213
214 return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te);
215 }
216
217 #if IS_ENABLED(CONFIG_IPV6)
218 /*
219 * chcr_ktls_act_open_req6: creates TCB entry for ipv6 connection.
220 * @sk - tcp socket.
221 * @tx_info - driver specific tls info.
222 * @atid - connection active tid.
223 * return - send success/failure.
224 */
chcr_ktls_act_open_req6(struct sock * sk,struct chcr_ktls_info * tx_info,int atid)225 static int chcr_ktls_act_open_req6(struct sock *sk,
226 struct chcr_ktls_info *tx_info,
227 int atid)
228 {
229 struct inet_sock *inet = inet_sk(sk);
230 struct cpl_t6_act_open_req6 *cpl6;
231 struct cpl_act_open_req6 *cpl;
232 struct sk_buff *skb;
233 unsigned int len;
234 int qid_atid;
235 u64 options;
236
237 len = sizeof(*cpl6);
238 skb = alloc_skb(len, GFP_KERNEL);
239 if (unlikely(!skb))
240 return -ENOMEM;
241 /* mark it a control pkt */
242 set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id);
243
244 cpl6 = __skb_put_zero(skb, len);
245 cpl = (struct cpl_act_open_req6 *)cpl6;
246 INIT_TP_WR(cpl6, 0);
247 qid_atid = TID_QID_V(tx_info->rx_qid) | TID_TID_V(atid);
248 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid));
249 cpl->local_port = inet->inet_sport;
250 cpl->peer_port = inet->inet_dport;
251 cpl->local_ip_hi = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[0];
252 cpl->local_ip_lo = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[8];
253 cpl->peer_ip_hi = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[0];
254 cpl->peer_ip_lo = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[8];
255
256 /* first 64 bit option field. */
257 options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F |
258 SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan);
259 cpl->opt0 = cpu_to_be64(options);
260 /* next 64 bit option field. */
261 options =
262 TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]);
263 cpl->opt2 = htonl(options);
264
265 return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te);
266 }
267 #endif /* #if IS_ENABLED(CONFIG_IPV6) */
268
269 /*
270 * chcr_setup_connection: create a TCB entry so that TP will form tcp packets.
271 * @sk - tcp socket.
272 * @tx_info - driver specific tls info.
273 * return: NET_TX_OK/NET_XMIT_DROP
274 */
chcr_setup_connection(struct sock * sk,struct chcr_ktls_info * tx_info)275 static int chcr_setup_connection(struct sock *sk,
276 struct chcr_ktls_info *tx_info)
277 {
278 struct tid_info *t = &tx_info->adap->tids;
279 int atid, ret = 0;
280
281 atid = cxgb4_alloc_atid(t, tx_info);
282 if (atid == -1)
283 return -EINVAL;
284
285 tx_info->atid = atid;
286
287 if (tx_info->ip_family == AF_INET) {
288 ret = chcr_ktls_act_open_req(sk, tx_info, atid);
289 #if IS_ENABLED(CONFIG_IPV6)
290 } else {
291 ret = cxgb4_clip_get(tx_info->netdev, (const u32 *)
292 &sk->sk_v6_rcv_saddr,
293 1);
294 if (ret)
295 return ret;
296 ret = chcr_ktls_act_open_req6(sk, tx_info, atid);
297 #endif
298 }
299
300 /* if return type is NET_XMIT_CN, msg will be sent but delayed, mark ret
301 * success, if any other return type clear atid and return that failure.
302 */
303 if (ret) {
304 if (ret == NET_XMIT_CN) {
305 ret = 0;
306 } else {
307 #if IS_ENABLED(CONFIG_IPV6)
308 /* clear clip entry */
309 if (tx_info->ip_family == AF_INET6)
310 cxgb4_clip_release(tx_info->netdev,
311 (const u32 *)
312 &sk->sk_v6_rcv_saddr,
313 1);
314 #endif
315 cxgb4_free_atid(t, atid);
316 }
317 }
318
319 return ret;
320 }
321
322 /*
323 * chcr_set_tcb_field: update tcb fields.
324 * @tx_info - driver specific tls info.
325 * @word - TCB word.
326 * @mask - TCB word related mask.
327 * @val - TCB word related value.
328 * @no_reply - set 1 if not looking for TP response.
329 */
chcr_set_tcb_field(struct chcr_ktls_info * tx_info,u16 word,u64 mask,u64 val,int no_reply)330 static int chcr_set_tcb_field(struct chcr_ktls_info *tx_info, u16 word,
331 u64 mask, u64 val, int no_reply)
332 {
333 struct cpl_set_tcb_field *req;
334 struct sk_buff *skb;
335
336 skb = alloc_skb(sizeof(struct cpl_set_tcb_field), GFP_ATOMIC);
337 if (!skb)
338 return -ENOMEM;
339
340 req = (struct cpl_set_tcb_field *)__skb_put_zero(skb, sizeof(*req));
341 INIT_TP_WR_CPL(req, CPL_SET_TCB_FIELD, tx_info->tid);
342 req->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) |
343 NO_REPLY_V(no_reply));
344 req->word_cookie = htons(TCB_WORD_V(word));
345 req->mask = cpu_to_be64(mask);
346 req->val = cpu_to_be64(val);
347
348 set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id);
349 return cxgb4_ofld_send(tx_info->netdev, skb);
350 }
351
352 /*
353 * chcr_ktls_dev_del: call back for tls_dev_del.
354 * Remove the tid and l2t entry and close the connection.
355 * it per connection basis.
356 * @netdev - net device.
357 * @tls_cts - tls context.
358 * @direction - TX/RX crypto direction
359 */
chcr_ktls_dev_del(struct net_device * netdev,struct tls_context * tls_ctx,enum tls_offload_ctx_dir direction)360 static void chcr_ktls_dev_del(struct net_device *netdev,
361 struct tls_context *tls_ctx,
362 enum tls_offload_ctx_dir direction)
363 {
364 struct chcr_ktls_ofld_ctx_tx *tx_ctx =
365 chcr_get_ktls_tx_context(tls_ctx);
366 struct chcr_ktls_info *tx_info = tx_ctx->chcr_info;
367 struct ch_ktls_port_stats_debug *port_stats;
368 struct chcr_ktls_uld_ctx *u_ctx;
369
370 if (!tx_info)
371 return;
372
373 u_ctx = tx_info->adap->uld[CXGB4_ULD_KTLS].handle;
374 if (u_ctx && u_ctx->detach)
375 return;
376 /* clear l2t entry */
377 if (tx_info->l2te)
378 cxgb4_l2t_release(tx_info->l2te);
379
380 #if IS_ENABLED(CONFIG_IPV6)
381 /* clear clip entry */
382 if (tx_info->ip_family == AF_INET6)
383 cxgb4_clip_release(netdev, (const u32 *)
384 &tx_info->sk->sk_v6_rcv_saddr,
385 1);
386 #endif
387
388 /* clear tid */
389 if (tx_info->tid != -1) {
390 cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan,
391 tx_info->tid, tx_info->ip_family);
392
393 xa_erase(&u_ctx->tid_list, tx_info->tid);
394 }
395
396 port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id];
397 atomic64_inc(&port_stats->ktls_tx_connection_close);
398 kvfree(tx_info);
399 tx_ctx->chcr_info = NULL;
400 /* release module refcount */
401 module_put(THIS_MODULE);
402 }
403
404 /*
405 * chcr_ktls_dev_add: call back for tls_dev_add.
406 * Create a tcb entry for TP. Also add l2t entry for the connection. And
407 * generate keys & save those keys locally.
408 * @netdev - net device.
409 * @tls_cts - tls context.
410 * @direction - TX/RX crypto direction
411 * return: SUCCESS/FAILURE.
412 */
chcr_ktls_dev_add(struct net_device * netdev,struct sock * sk,enum tls_offload_ctx_dir direction,struct tls_crypto_info * crypto_info,u32 start_offload_tcp_sn)413 static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk,
414 enum tls_offload_ctx_dir direction,
415 struct tls_crypto_info *crypto_info,
416 u32 start_offload_tcp_sn)
417 {
418 struct tls_context *tls_ctx = tls_get_ctx(sk);
419 struct ch_ktls_port_stats_debug *port_stats;
420 struct chcr_ktls_ofld_ctx_tx *tx_ctx;
421 struct chcr_ktls_uld_ctx *u_ctx;
422 struct chcr_ktls_info *tx_info;
423 struct dst_entry *dst;
424 struct adapter *adap;
425 struct port_info *pi;
426 struct neighbour *n;
427 u8 daaddr[16];
428 int ret = -1;
429
430 tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
431
432 pi = netdev_priv(netdev);
433 adap = pi->adapter;
434 port_stats = &adap->ch_ktls_stats.ktls_port[pi->port_id];
435 atomic64_inc(&port_stats->ktls_tx_connection_open);
436 u_ctx = adap->uld[CXGB4_ULD_KTLS].handle;
437
438 if (direction == TLS_OFFLOAD_CTX_DIR_RX) {
439 pr_err("not expecting for RX direction\n");
440 goto out;
441 }
442
443 if (tx_ctx->chcr_info)
444 goto out;
445
446 if (u_ctx && u_ctx->detach)
447 goto out;
448
449 tx_info = kvzalloc(sizeof(*tx_info), GFP_KERNEL);
450 if (!tx_info)
451 goto out;
452
453 tx_info->sk = sk;
454 spin_lock_init(&tx_info->lock);
455 /* initialize tid and atid to -1, 0 is a also a valid id. */
456 tx_info->tid = -1;
457 tx_info->atid = -1;
458
459 tx_info->adap = adap;
460 tx_info->netdev = netdev;
461 tx_info->first_qset = pi->first_qset;
462 tx_info->tx_chan = pi->tx_chan;
463 tx_info->smt_idx = pi->smt_idx;
464 tx_info->port_id = pi->port_id;
465 tx_info->prev_ack = 0;
466 tx_info->prev_win = 0;
467
468 tx_info->rx_qid = chcr_get_first_rx_qid(adap);
469 if (unlikely(tx_info->rx_qid < 0))
470 goto free_tx_info;
471
472 tx_info->prev_seq = start_offload_tcp_sn;
473 tx_info->tcp_start_seq_number = start_offload_tcp_sn;
474
475 /* save crypto keys */
476 ret = chcr_ktls_save_keys(tx_info, crypto_info, direction);
477 if (ret < 0)
478 goto free_tx_info;
479
480 /* get peer ip */
481 if (sk->sk_family == AF_INET) {
482 memcpy(daaddr, &sk->sk_daddr, 4);
483 tx_info->ip_family = AF_INET;
484 #if IS_ENABLED(CONFIG_IPV6)
485 } else {
486 if (!ipv6_only_sock(sk) &&
487 ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) {
488 memcpy(daaddr, &sk->sk_daddr, 4);
489 tx_info->ip_family = AF_INET;
490 } else {
491 memcpy(daaddr, sk->sk_v6_daddr.in6_u.u6_addr8, 16);
492 tx_info->ip_family = AF_INET6;
493 }
494 #endif
495 }
496
497 /* get the l2t index */
498 dst = sk_dst_get(sk);
499 if (!dst) {
500 pr_err("DST entry not found\n");
501 goto free_tx_info;
502 }
503 n = dst_neigh_lookup(dst, daaddr);
504 if (!n || !n->dev) {
505 pr_err("neighbour not found\n");
506 dst_release(dst);
507 goto free_tx_info;
508 }
509 tx_info->l2te = cxgb4_l2t_get(adap->l2t, n, n->dev, 0);
510
511 neigh_release(n);
512 dst_release(dst);
513
514 if (!tx_info->l2te) {
515 pr_err("l2t entry not found\n");
516 goto free_tx_info;
517 }
518
519 /* Driver shouldn't be removed until any single connection exists */
520 if (!try_module_get(THIS_MODULE))
521 goto free_l2t;
522
523 init_completion(&tx_info->completion);
524 /* create a filter and call cxgb4_l2t_send to send the packet out, which
525 * will take care of updating l2t entry in hw if not already done.
526 */
527 tx_info->open_state = CH_KTLS_OPEN_PENDING;
528
529 if (chcr_setup_connection(sk, tx_info))
530 goto put_module;
531
532 /* Wait for reply */
533 wait_for_completion_timeout(&tx_info->completion, 30 * HZ);
534 spin_lock_bh(&tx_info->lock);
535 if (tx_info->open_state) {
536 /* need to wait for hw response, can't free tx_info yet. */
537 if (tx_info->open_state == CH_KTLS_OPEN_PENDING)
538 tx_info->pending_close = true;
539 else
540 spin_unlock_bh(&tx_info->lock);
541 /* if in pending close, free the lock after the cleanup */
542 goto put_module;
543 }
544 spin_unlock_bh(&tx_info->lock);
545
546 /* initialize tcb */
547 reinit_completion(&tx_info->completion);
548 /* mark it pending for hw response */
549 tx_info->open_state = CH_KTLS_OPEN_PENDING;
550
551 if (chcr_init_tcb_fields(tx_info))
552 goto free_tid;
553
554 /* Wait for reply */
555 wait_for_completion_timeout(&tx_info->completion, 30 * HZ);
556 spin_lock_bh(&tx_info->lock);
557 if (tx_info->open_state) {
558 /* need to wait for hw response, can't free tx_info yet. */
559 tx_info->pending_close = true;
560 /* free the lock after cleanup */
561 goto free_tid;
562 }
563 spin_unlock_bh(&tx_info->lock);
564
565 if (!cxgb4_check_l2t_valid(tx_info->l2te))
566 goto free_tid;
567
568 atomic64_inc(&port_stats->ktls_tx_ctx);
569 tx_ctx->chcr_info = tx_info;
570
571 return 0;
572
573 free_tid:
574 #if IS_ENABLED(CONFIG_IPV6)
575 /* clear clip entry */
576 if (tx_info->ip_family == AF_INET6)
577 cxgb4_clip_release(netdev, (const u32 *)
578 &sk->sk_v6_rcv_saddr,
579 1);
580 #endif
581 cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan,
582 tx_info->tid, tx_info->ip_family);
583
584 xa_erase(&u_ctx->tid_list, tx_info->tid);
585
586 put_module:
587 /* release module refcount */
588 module_put(THIS_MODULE);
589 free_l2t:
590 cxgb4_l2t_release(tx_info->l2te);
591 free_tx_info:
592 if (tx_info->pending_close)
593 spin_unlock_bh(&tx_info->lock);
594 else
595 kvfree(tx_info);
596 out:
597 atomic64_inc(&port_stats->ktls_tx_connection_fail);
598 return -1;
599 }
600
601 /*
602 * chcr_init_tcb_fields: Initialize tcb fields to handle TCP seq number
603 * handling.
604 * @tx_info - driver specific tls info.
605 * return: NET_TX_OK/NET_XMIT_DROP
606 */
chcr_init_tcb_fields(struct chcr_ktls_info * tx_info)607 static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info)
608 {
609 int ret = 0;
610
611 /* set tcb in offload and bypass */
612 ret =
613 chcr_set_tcb_field(tx_info, TCB_T_FLAGS_W,
614 TCB_T_FLAGS_V(TF_CORE_BYPASS_F | TF_NON_OFFLOAD_F),
615 TCB_T_FLAGS_V(TF_CORE_BYPASS_F), 1);
616 if (ret)
617 return ret;
618 /* reset snd_una and snd_next fields in tcb */
619 ret = chcr_set_tcb_field(tx_info, TCB_SND_UNA_RAW_W,
620 TCB_SND_NXT_RAW_V(TCB_SND_NXT_RAW_M) |
621 TCB_SND_UNA_RAW_V(TCB_SND_UNA_RAW_M),
622 0, 1);
623 if (ret)
624 return ret;
625
626 /* reset send max */
627 ret = chcr_set_tcb_field(tx_info, TCB_SND_MAX_RAW_W,
628 TCB_SND_MAX_RAW_V(TCB_SND_MAX_RAW_M),
629 0, 1);
630 if (ret)
631 return ret;
632
633 /* update l2t index and request for tp reply to confirm tcb is
634 * initialised to handle tx traffic.
635 */
636 ret = chcr_set_tcb_field(tx_info, TCB_L2T_IX_W,
637 TCB_L2T_IX_V(TCB_L2T_IX_M),
638 TCB_L2T_IX_V(tx_info->l2te->idx), 0);
639 return ret;
640 }
641
642 /*
643 * chcr_ktls_cpl_act_open_rpl: connection reply received from TP.
644 */
chcr_ktls_cpl_act_open_rpl(struct adapter * adap,unsigned char * input)645 static int chcr_ktls_cpl_act_open_rpl(struct adapter *adap,
646 unsigned char *input)
647 {
648 const struct cpl_act_open_rpl *p = (void *)input;
649 struct chcr_ktls_info *tx_info = NULL;
650 struct chcr_ktls_ofld_ctx_tx *tx_ctx;
651 struct chcr_ktls_uld_ctx *u_ctx;
652 unsigned int atid, tid, status;
653 struct tls_context *tls_ctx;
654 struct tid_info *t;
655 int ret = 0;
656
657 tid = GET_TID(p);
658 status = AOPEN_STATUS_G(ntohl(p->atid_status));
659 atid = TID_TID_G(AOPEN_ATID_G(ntohl(p->atid_status)));
660
661 t = &adap->tids;
662 tx_info = lookup_atid(t, atid);
663
664 if (!tx_info || tx_info->atid != atid) {
665 pr_err("%s: incorrect tx_info or atid\n", __func__);
666 return -1;
667 }
668
669 cxgb4_free_atid(t, atid);
670 tx_info->atid = -1;
671
672 spin_lock(&tx_info->lock);
673 /* HW response is very close, finish pending cleanup */
674 if (tx_info->pending_close) {
675 spin_unlock(&tx_info->lock);
676 if (!status) {
677 cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan,
678 tid, tx_info->ip_family);
679 }
680 kvfree(tx_info);
681 return 0;
682 }
683
684 if (!status) {
685 tx_info->tid = tid;
686 cxgb4_insert_tid(t, tx_info, tx_info->tid, tx_info->ip_family);
687 /* Adding tid */
688 tls_ctx = tls_get_ctx(tx_info->sk);
689 tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
690 u_ctx = adap->uld[CXGB4_ULD_KTLS].handle;
691 if (u_ctx) {
692 ret = xa_insert_bh(&u_ctx->tid_list, tid, tx_ctx,
693 GFP_NOWAIT);
694 if (ret < 0) {
695 pr_err("%s: Failed to allocate tid XA entry = %d\n",
696 __func__, tx_info->tid);
697 tx_info->open_state = CH_KTLS_OPEN_FAILURE;
698 goto out;
699 }
700 }
701 tx_info->open_state = CH_KTLS_OPEN_SUCCESS;
702 } else {
703 tx_info->open_state = CH_KTLS_OPEN_FAILURE;
704 }
705 out:
706 spin_unlock(&tx_info->lock);
707
708 complete(&tx_info->completion);
709 return ret;
710 }
711
712 /*
713 * chcr_ktls_cpl_set_tcb_rpl: TCB reply received from TP.
714 */
chcr_ktls_cpl_set_tcb_rpl(struct adapter * adap,unsigned char * input)715 static int chcr_ktls_cpl_set_tcb_rpl(struct adapter *adap, unsigned char *input)
716 {
717 const struct cpl_set_tcb_rpl *p = (void *)input;
718 struct chcr_ktls_info *tx_info = NULL;
719 struct tid_info *t;
720 u32 tid;
721
722 tid = GET_TID(p);
723
724 t = &adap->tids;
725 tx_info = lookup_tid(t, tid);
726
727 if (!tx_info || tx_info->tid != tid) {
728 pr_err("%s: incorrect tx_info or tid\n", __func__);
729 return -1;
730 }
731
732 spin_lock(&tx_info->lock);
733 if (tx_info->pending_close) {
734 spin_unlock(&tx_info->lock);
735 kvfree(tx_info);
736 return 0;
737 }
738 tx_info->open_state = CH_KTLS_OPEN_SUCCESS;
739 spin_unlock(&tx_info->lock);
740
741 complete(&tx_info->completion);
742 return 0;
743 }
744
__chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info * tx_info,u32 tid,void * pos,u16 word,struct sge_eth_txq * q,u64 mask,u64 val,u32 reply)745 static void *__chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info,
746 u32 tid, void *pos, u16 word,
747 struct sge_eth_txq *q, u64 mask,
748 u64 val, u32 reply)
749 {
750 struct cpl_set_tcb_field_core *cpl;
751 struct ulptx_idata *idata;
752 struct ulp_txpkt *txpkt;
753
754 /* ULP_TXPKT */
755 txpkt = pos;
756 txpkt->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
757 ULP_TXPKT_CHANNELID_V(tx_info->port_id) |
758 ULP_TXPKT_FID_V(q->q.cntxt_id) |
759 ULP_TXPKT_RO_F);
760 txpkt->len = htonl(DIV_ROUND_UP(CHCR_SET_TCB_FIELD_LEN, 16));
761
762 /* ULPTX_IDATA sub-command */
763 idata = (struct ulptx_idata *)(txpkt + 1);
764 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
765 idata->len = htonl(sizeof(*cpl));
766 pos = idata + 1;
767
768 cpl = pos;
769 /* CPL_SET_TCB_FIELD */
770 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
771 cpl->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) |
772 NO_REPLY_V(!reply));
773 cpl->word_cookie = htons(TCB_WORD_V(word));
774 cpl->mask = cpu_to_be64(mask);
775 cpl->val = cpu_to_be64(val);
776
777 /* ULPTX_NOOP */
778 idata = (struct ulptx_idata *)(cpl + 1);
779 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_NOOP));
780 idata->len = htonl(0);
781 pos = idata + 1;
782
783 return pos;
784 }
785
786
787 /*
788 * chcr_write_cpl_set_tcb_ulp: update tcb values.
789 * TCB is responsible to create tcp headers, so all the related values
790 * should be correctly updated.
791 * @tx_info - driver specific tls info.
792 * @q - tx queue on which packet is going out.
793 * @tid - TCB identifier.
794 * @pos - current index where should we start writing.
795 * @word - TCB word.
796 * @mask - TCB word related mask.
797 * @val - TCB word related value.
798 * @reply - set 1 if looking for TP response.
799 * return - next position to write.
800 */
chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info * tx_info,struct sge_eth_txq * q,u32 tid,void * pos,u16 word,u64 mask,u64 val,u32 reply)801 static void *chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info,
802 struct sge_eth_txq *q, u32 tid,
803 void *pos, u16 word, u64 mask,
804 u64 val, u32 reply)
805 {
806 int left = (void *)q->q.stat - pos;
807
808 if (unlikely(left < CHCR_SET_TCB_FIELD_LEN)) {
809 if (!left) {
810 pos = q->q.desc;
811 } else {
812 u8 buf[48] = {0};
813
814 __chcr_write_cpl_set_tcb_ulp(tx_info, tid, buf, word, q,
815 mask, val, reply);
816
817 return chcr_copy_to_txd(buf, &q->q, pos,
818 CHCR_SET_TCB_FIELD_LEN);
819 }
820 }
821
822 pos = __chcr_write_cpl_set_tcb_ulp(tx_info, tid, pos, word, q,
823 mask, val, reply);
824
825 /* check again if we are at the end of the queue */
826 if (left == CHCR_SET_TCB_FIELD_LEN)
827 pos = q->q.desc;
828
829 return pos;
830 }
831
832 /*
833 * chcr_ktls_xmit_tcb_cpls: update tcb entry so that TP will create the header
834 * with updated values like tcp seq, ack, window etc.
835 * @tx_info - driver specific tls info.
836 * @q - TX queue.
837 * @tcp_seq
838 * @tcp_ack
839 * @tcp_win
840 * return: NETDEV_TX_BUSY/NET_TX_OK.
841 */
chcr_ktls_xmit_tcb_cpls(struct chcr_ktls_info * tx_info,struct sge_eth_txq * q,u64 tcp_seq,u64 tcp_ack,u64 tcp_win,bool offset)842 static int chcr_ktls_xmit_tcb_cpls(struct chcr_ktls_info *tx_info,
843 struct sge_eth_txq *q, u64 tcp_seq,
844 u64 tcp_ack, u64 tcp_win, bool offset)
845 {
846 bool first_wr = ((tx_info->prev_ack == 0) && (tx_info->prev_win == 0));
847 struct ch_ktls_port_stats_debug *port_stats;
848 u32 len, cpl = 0, ndesc, wr_len, wr_mid = 0;
849 struct fw_ulptx_wr *wr;
850 int credits;
851 void *pos;
852
853 wr_len = sizeof(*wr);
854 /* there can be max 4 cpls, check if we have enough credits */
855 len = wr_len + 4 * roundup(CHCR_SET_TCB_FIELD_LEN, 16);
856 ndesc = DIV_ROUND_UP(len, 64);
857
858 credits = chcr_txq_avail(&q->q) - ndesc;
859 if (unlikely(credits < 0)) {
860 chcr_eth_txq_stop(q);
861 return NETDEV_TX_BUSY;
862 }
863
864 if (unlikely(credits < ETHTXQ_STOP_THRES)) {
865 chcr_eth_txq_stop(q);
866 wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
867 }
868
869 pos = &q->q.desc[q->q.pidx];
870 /* make space for WR, we'll fill it later when we know all the cpls
871 * being sent out and have complete length.
872 */
873 wr = pos;
874 pos += wr_len;
875 /* update tx_max if its a re-transmit or the first wr */
876 if (first_wr || tcp_seq != tx_info->prev_seq) {
877 pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
878 TCB_TX_MAX_W,
879 TCB_TX_MAX_V(TCB_TX_MAX_M),
880 TCB_TX_MAX_V(tcp_seq), 0);
881 cpl++;
882 }
883 /* reset snd una if it's a re-transmit pkt */
884 if (tcp_seq != tx_info->prev_seq || offset) {
885 /* reset snd_una */
886 port_stats =
887 &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id];
888 pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
889 TCB_SND_UNA_RAW_W,
890 TCB_SND_UNA_RAW_V
891 (TCB_SND_UNA_RAW_M),
892 TCB_SND_UNA_RAW_V(0), 0);
893 if (tcp_seq != tx_info->prev_seq)
894 atomic64_inc(&port_stats->ktls_tx_ooo);
895 cpl++;
896 }
897 /* update ack */
898 if (first_wr || tx_info->prev_ack != tcp_ack) {
899 pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
900 TCB_RCV_NXT_W,
901 TCB_RCV_NXT_V(TCB_RCV_NXT_M),
902 TCB_RCV_NXT_V(tcp_ack), 0);
903 tx_info->prev_ack = tcp_ack;
904 cpl++;
905 }
906 /* update receive window */
907 if (first_wr || tx_info->prev_win != tcp_win) {
908 chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
909 TCB_RCV_WND_W,
910 TCB_RCV_WND_V(TCB_RCV_WND_M),
911 TCB_RCV_WND_V(tcp_win), 0);
912 tx_info->prev_win = tcp_win;
913 cpl++;
914 }
915
916 if (cpl) {
917 /* get the actual length */
918 len = wr_len + cpl * roundup(CHCR_SET_TCB_FIELD_LEN, 16);
919 /* ULPTX wr */
920 wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
921 wr->cookie = 0;
922 /* fill len in wr field */
923 wr->flowid_len16 = htonl(wr_mid |
924 FW_WR_LEN16_V(DIV_ROUND_UP(len, 16)));
925
926 ndesc = DIV_ROUND_UP(len, 64);
927 chcr_txq_advance(&q->q, ndesc);
928 cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc);
929 }
930 return 0;
931 }
932
933 /*
934 * chcr_ktls_get_tx_flits
935 * returns number of flits to be sent out, it includes key context length, WR
936 * size and skb fragments.
937 */
938 static unsigned int
chcr_ktls_get_tx_flits(u32 nr_frags,unsigned int key_ctx_len)939 chcr_ktls_get_tx_flits(u32 nr_frags, unsigned int key_ctx_len)
940 {
941 return chcr_sgl_len(nr_frags) +
942 DIV_ROUND_UP(key_ctx_len + CHCR_KTLS_WR_SIZE, 8);
943 }
944
945 /*
946 * chcr_ktls_check_tcp_options: To check if there is any TCP option available
947 * other than timestamp.
948 * @skb - skb contains partial record..
949 * return: 1 / 0
950 */
951 static int
chcr_ktls_check_tcp_options(struct tcphdr * tcp)952 chcr_ktls_check_tcp_options(struct tcphdr *tcp)
953 {
954 int cnt, opt, optlen;
955 u_char *cp;
956
957 cp = (u_char *)(tcp + 1);
958 cnt = (tcp->doff << 2) - sizeof(struct tcphdr);
959 for (; cnt > 0; cnt -= optlen, cp += optlen) {
960 opt = cp[0];
961 if (opt == TCPOPT_EOL)
962 break;
963 if (opt == TCPOPT_NOP) {
964 optlen = 1;
965 } else {
966 if (cnt < 2)
967 break;
968 optlen = cp[1];
969 if (optlen < 2 || optlen > cnt)
970 break;
971 }
972 switch (opt) {
973 case TCPOPT_NOP:
974 break;
975 default:
976 return 1;
977 }
978 }
979 return 0;
980 }
981
982 /*
983 * chcr_ktls_write_tcp_options : TP can't send out all the options, we need to
984 * send out separately.
985 * @tx_info - driver specific tls info.
986 * @skb - skb contains partial record..
987 * @q - TX queue.
988 * @tx_chan - channel number.
989 * return: NETDEV_TX_OK/NETDEV_TX_BUSY.
990 */
991 static int
chcr_ktls_write_tcp_options(struct chcr_ktls_info * tx_info,struct sk_buff * skb,struct sge_eth_txq * q,uint32_t tx_chan)992 chcr_ktls_write_tcp_options(struct chcr_ktls_info *tx_info, struct sk_buff *skb,
993 struct sge_eth_txq *q, uint32_t tx_chan)
994 {
995 struct fw_eth_tx_pkt_wr *wr;
996 struct cpl_tx_pkt_core *cpl;
997 u32 ctrl, iplen, maclen;
998 struct ipv6hdr *ip6;
999 unsigned int ndesc;
1000 struct tcphdr *tcp;
1001 int len16, pktlen;
1002 struct iphdr *ip;
1003 u32 wr_mid = 0;
1004 int credits;
1005 u8 buf[150];
1006 u64 cntrl1;
1007 void *pos;
1008
1009 iplen = skb_network_header_len(skb);
1010 maclen = skb_mac_header_len(skb);
1011
1012 /* packet length = eth hdr len + ip hdr len + tcp hdr len
1013 * (including options).
1014 */
1015 pktlen = skb_tcp_all_headers(skb);
1016
1017 ctrl = sizeof(*cpl) + pktlen;
1018 len16 = DIV_ROUND_UP(sizeof(*wr) + ctrl, 16);
1019 /* check how many descriptors needed */
1020 ndesc = DIV_ROUND_UP(len16, 4);
1021
1022 credits = chcr_txq_avail(&q->q) - ndesc;
1023 if (unlikely(credits < 0)) {
1024 chcr_eth_txq_stop(q);
1025 return NETDEV_TX_BUSY;
1026 }
1027
1028 if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1029 chcr_eth_txq_stop(q);
1030 wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1031 }
1032
1033 pos = &q->q.desc[q->q.pidx];
1034 wr = pos;
1035
1036 /* Firmware work request header */
1037 wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) |
1038 FW_WR_IMMDLEN_V(ctrl));
1039
1040 wr->equiq_to_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1041 wr->r3 = 0;
1042
1043 cpl = (void *)(wr + 1);
1044
1045 /* CPL header */
1046 cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) | TXPKT_INTF_V(tx_chan) |
1047 TXPKT_PF_V(tx_info->adap->pf));
1048 cpl->pack = 0;
1049 cpl->len = htons(pktlen);
1050
1051 memcpy(buf, skb->data, pktlen);
1052 if (!IS_ENABLED(CONFIG_IPV6) || tx_info->ip_family == AF_INET) {
1053 /* we need to correct ip header len */
1054 ip = (struct iphdr *)(buf + maclen);
1055 ip->tot_len = htons(pktlen - maclen);
1056 cntrl1 = TXPKT_CSUM_TYPE_V(TX_CSUM_TCPIP);
1057 } else {
1058 ip6 = (struct ipv6hdr *)(buf + maclen);
1059 ip6->payload_len = htons(pktlen - maclen - iplen);
1060 cntrl1 = TXPKT_CSUM_TYPE_V(TX_CSUM_TCPIP6);
1061 }
1062
1063 cntrl1 |= T6_TXPKT_ETHHDR_LEN_V(maclen - ETH_HLEN) |
1064 TXPKT_IPHDR_LEN_V(iplen);
1065 /* checksum offload */
1066 cpl->ctrl1 = cpu_to_be64(cntrl1);
1067
1068 pos = cpl + 1;
1069
1070 /* now take care of the tcp header, if fin is not set then clear push
1071 * bit as well, and if fin is set, it will be sent at the last so we
1072 * need to update the tcp sequence number as per the last packet.
1073 */
1074 tcp = (struct tcphdr *)(buf + maclen + iplen);
1075
1076 if (!tcp->fin)
1077 tcp->psh = 0;
1078 else
1079 tcp->seq = htonl(tx_info->prev_seq);
1080
1081 chcr_copy_to_txd(buf, &q->q, pos, pktlen);
1082
1083 chcr_txq_advance(&q->q, ndesc);
1084 cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc);
1085 return 0;
1086 }
1087
1088 /*
1089 * chcr_ktls_xmit_wr_complete: This sends out the complete record. If an skb
1090 * received has partial end part of the record, send out the complete record, so
1091 * that crypto block will be able to generate TAG/HASH.
1092 * @skb - segment which has complete or partial end part.
1093 * @tx_info - driver specific tls info.
1094 * @q - TX queue.
1095 * @tcp_seq
1096 * @tcp_push - tcp push bit.
1097 * @mss - segment size.
1098 * return: NETDEV_TX_BUSY/NET_TX_OK.
1099 */
chcr_ktls_xmit_wr_complete(struct sk_buff * skb,struct chcr_ktls_info * tx_info,struct sge_eth_txq * q,u32 tcp_seq,bool is_last_wr,u32 data_len,u32 skb_offset,u32 nfrags,bool tcp_push,u32 mss)1100 static int chcr_ktls_xmit_wr_complete(struct sk_buff *skb,
1101 struct chcr_ktls_info *tx_info,
1102 struct sge_eth_txq *q, u32 tcp_seq,
1103 bool is_last_wr, u32 data_len,
1104 u32 skb_offset, u32 nfrags,
1105 bool tcp_push, u32 mss)
1106 {
1107 u32 len16, wr_mid = 0, flits = 0, ndesc, cipher_start;
1108 struct adapter *adap = tx_info->adap;
1109 int credits, left, last_desc;
1110 struct tx_sw_desc *sgl_sdesc;
1111 struct cpl_tx_data *tx_data;
1112 struct cpl_tx_sec_pdu *cpl;
1113 struct ulptx_idata *idata;
1114 struct ulp_txpkt *ulptx;
1115 struct fw_ulptx_wr *wr;
1116 void *pos;
1117 u64 *end;
1118
1119 /* get the number of flits required */
1120 flits = chcr_ktls_get_tx_flits(nfrags, tx_info->key_ctx_len);
1121 /* number of descriptors */
1122 ndesc = chcr_flits_to_desc(flits);
1123 /* check if enough credits available */
1124 credits = chcr_txq_avail(&q->q) - ndesc;
1125 if (unlikely(credits < 0)) {
1126 chcr_eth_txq_stop(q);
1127 return NETDEV_TX_BUSY;
1128 }
1129
1130 if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1131 /* Credits are below the threshold values, stop the queue after
1132 * injecting the Work Request for this packet.
1133 */
1134 chcr_eth_txq_stop(q);
1135 wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1136 }
1137
1138 last_desc = q->q.pidx + ndesc - 1;
1139 if (last_desc >= q->q.size)
1140 last_desc -= q->q.size;
1141 sgl_sdesc = &q->q.sdesc[last_desc];
1142
1143 if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) {
1144 memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr));
1145 q->mapping_err++;
1146 return NETDEV_TX_BUSY;
1147 }
1148
1149 if (!is_last_wr)
1150 skb_get(skb);
1151
1152 pos = &q->q.desc[q->q.pidx];
1153 end = (u64 *)pos + flits;
1154 /* FW_ULPTX_WR */
1155 wr = pos;
1156 /* WR will need len16 */
1157 len16 = DIV_ROUND_UP(flits, 2);
1158 wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
1159 wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1160 wr->cookie = 0;
1161 pos += sizeof(*wr);
1162 /* ULP_TXPKT */
1163 ulptx = pos;
1164 ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
1165 ULP_TXPKT_CHANNELID_V(tx_info->port_id) |
1166 ULP_TXPKT_FID_V(q->q.cntxt_id) |
1167 ULP_TXPKT_RO_F);
1168 ulptx->len = htonl(len16 - 1);
1169 /* ULPTX_IDATA sub-command */
1170 idata = (struct ulptx_idata *)(ulptx + 1);
1171 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F);
1172 /* idata length will include cpl_tx_sec_pdu + key context size +
1173 * cpl_tx_data header.
1174 */
1175 idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len +
1176 sizeof(*tx_data));
1177 /* SEC CPL */
1178 cpl = (struct cpl_tx_sec_pdu *)(idata + 1);
1179 cpl->op_ivinsrtofst =
1180 htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) |
1181 CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) |
1182 CPL_TX_SEC_PDU_PLACEHOLDER_V(1) |
1183 CPL_TX_SEC_PDU_IVINSRTOFST_V(TLS_HEADER_SIZE + 1));
1184 cpl->pldlen = htonl(data_len);
1185
1186 /* encryption should start after tls header size + iv size */
1187 cipher_start = TLS_HEADER_SIZE + tx_info->iv_size + 1;
1188
1189 cpl->aadstart_cipherstop_hi =
1190 htonl(CPL_TX_SEC_PDU_AADSTART_V(1) |
1191 CPL_TX_SEC_PDU_AADSTOP_V(TLS_HEADER_SIZE) |
1192 CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start));
1193
1194 /* authentication will also start after tls header + iv size */
1195 cpl->cipherstop_lo_authinsert =
1196 htonl(CPL_TX_SEC_PDU_AUTHSTART_V(cipher_start) |
1197 CPL_TX_SEC_PDU_AUTHSTOP_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE) |
1198 CPL_TX_SEC_PDU_AUTHINSERT_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE));
1199
1200 /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */
1201 cpl->seqno_numivs = htonl(tx_info->scmd0_seqno_numivs);
1202 cpl->ivgen_hdrlen = htonl(tx_info->scmd0_ivgen_hdrlen);
1203 cpl->scmd1 = cpu_to_be64(tx_info->record_no);
1204
1205 pos = cpl + 1;
1206 /* check if space left to fill the keys */
1207 left = (void *)q->q.stat - pos;
1208 if (!left) {
1209 left = (void *)end - (void *)q->q.stat;
1210 pos = q->q.desc;
1211 end = pos + left;
1212 }
1213
1214 pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos,
1215 tx_info->key_ctx_len);
1216 left = (void *)q->q.stat - pos;
1217
1218 if (!left) {
1219 left = (void *)end - (void *)q->q.stat;
1220 pos = q->q.desc;
1221 end = pos + left;
1222 }
1223 /* CPL_TX_DATA */
1224 tx_data = (void *)pos;
1225 OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid));
1226 tx_data->len = htonl(TX_DATA_MSS_V(mss) | TX_LENGTH_V(data_len));
1227
1228 tx_data->rsvd = htonl(tcp_seq);
1229
1230 tx_data->flags = htonl(TX_BYPASS_F);
1231 if (tcp_push)
1232 tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F);
1233
1234 /* check left again, it might go beyond queue limit */
1235 pos = tx_data + 1;
1236 left = (void *)q->q.stat - pos;
1237
1238 /* check the position again */
1239 if (!left) {
1240 left = (void *)end - (void *)q->q.stat;
1241 pos = q->q.desc;
1242 end = pos + left;
1243 }
1244
1245 /* send the complete packet except the header */
1246 cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr,
1247 skb_offset, data_len);
1248 sgl_sdesc->skb = skb;
1249
1250 chcr_txq_advance(&q->q, ndesc);
1251 cxgb4_ring_tx_db(adap, &q->q, ndesc);
1252 atomic64_inc(&adap->ch_ktls_stats.ktls_tx_send_records);
1253
1254 return 0;
1255 }
1256
1257 /*
1258 * chcr_ktls_xmit_wr_short: This is to send out partial records. If its
1259 * a middle part of a record, fetch the prior data to make it 16 byte aligned
1260 * and then only send it out.
1261 *
1262 * @skb - skb contains partial record..
1263 * @tx_info - driver specific tls info.
1264 * @q - TX queue.
1265 * @tcp_seq
1266 * @tcp_push - tcp push bit.
1267 * @mss - segment size.
1268 * @tls_rec_offset - offset from start of the tls record.
1269 * @perior_data - data before the current segment, required to make this record
1270 * 16 byte aligned.
1271 * @prior_data_len - prior_data length (less than 16)
1272 * return: NETDEV_TX_BUSY/NET_TX_OK.
1273 */
chcr_ktls_xmit_wr_short(struct sk_buff * skb,struct chcr_ktls_info * tx_info,struct sge_eth_txq * q,u32 tcp_seq,bool tcp_push,u32 mss,u32 tls_rec_offset,u8 * prior_data,u32 prior_data_len,u32 data_len,u32 skb_offset)1274 static int chcr_ktls_xmit_wr_short(struct sk_buff *skb,
1275 struct chcr_ktls_info *tx_info,
1276 struct sge_eth_txq *q,
1277 u32 tcp_seq, bool tcp_push, u32 mss,
1278 u32 tls_rec_offset, u8 *prior_data,
1279 u32 prior_data_len, u32 data_len,
1280 u32 skb_offset)
1281 {
1282 u32 len16, wr_mid = 0, cipher_start, nfrags;
1283 struct adapter *adap = tx_info->adap;
1284 unsigned int flits = 0, ndesc;
1285 int credits, left, last_desc;
1286 struct tx_sw_desc *sgl_sdesc;
1287 struct cpl_tx_data *tx_data;
1288 struct cpl_tx_sec_pdu *cpl;
1289 struct ulptx_idata *idata;
1290 struct ulp_txpkt *ulptx;
1291 struct fw_ulptx_wr *wr;
1292 __be64 iv_record;
1293 void *pos;
1294 u64 *end;
1295
1296 nfrags = chcr_get_nfrags_to_send(skb, skb_offset, data_len);
1297 /* get the number of flits required, it's a partial record so 2 flits
1298 * (AES_BLOCK_SIZE) will be added.
1299 */
1300 flits = chcr_ktls_get_tx_flits(nfrags, tx_info->key_ctx_len) + 2;
1301 /* get the correct 8 byte IV of this record */
1302 iv_record = cpu_to_be64(tx_info->iv + tx_info->record_no);
1303 /* If it's a middle record and not 16 byte aligned to run AES CTR, need
1304 * to make it 16 byte aligned. So atleadt 2 extra flits of immediate
1305 * data will be added.
1306 */
1307 if (prior_data_len)
1308 flits += 2;
1309 /* number of descriptors */
1310 ndesc = chcr_flits_to_desc(flits);
1311 /* check if enough credits available */
1312 credits = chcr_txq_avail(&q->q) - ndesc;
1313 if (unlikely(credits < 0)) {
1314 chcr_eth_txq_stop(q);
1315 return NETDEV_TX_BUSY;
1316 }
1317
1318 if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1319 chcr_eth_txq_stop(q);
1320 wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1321 }
1322
1323 last_desc = q->q.pidx + ndesc - 1;
1324 if (last_desc >= q->q.size)
1325 last_desc -= q->q.size;
1326 sgl_sdesc = &q->q.sdesc[last_desc];
1327
1328 if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) {
1329 memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr));
1330 q->mapping_err++;
1331 return NETDEV_TX_BUSY;
1332 }
1333
1334 pos = &q->q.desc[q->q.pidx];
1335 end = (u64 *)pos + flits;
1336 /* FW_ULPTX_WR */
1337 wr = pos;
1338 /* WR will need len16 */
1339 len16 = DIV_ROUND_UP(flits, 2);
1340 wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
1341 wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1342 wr->cookie = 0;
1343 pos += sizeof(*wr);
1344 /* ULP_TXPKT */
1345 ulptx = pos;
1346 ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
1347 ULP_TXPKT_CHANNELID_V(tx_info->port_id) |
1348 ULP_TXPKT_FID_V(q->q.cntxt_id) |
1349 ULP_TXPKT_RO_F);
1350 ulptx->len = htonl(len16 - 1);
1351 /* ULPTX_IDATA sub-command */
1352 idata = (struct ulptx_idata *)(ulptx + 1);
1353 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F);
1354 /* idata length will include cpl_tx_sec_pdu + key context size +
1355 * cpl_tx_data header.
1356 */
1357 idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len +
1358 sizeof(*tx_data) + AES_BLOCK_LEN + prior_data_len);
1359 /* SEC CPL */
1360 cpl = (struct cpl_tx_sec_pdu *)(idata + 1);
1361 /* cipher start will have tls header + iv size extra if its a header
1362 * part of tls record. else only 16 byte IV will be added.
1363 */
1364 cipher_start =
1365 AES_BLOCK_LEN + 1 +
1366 (!tls_rec_offset ? TLS_HEADER_SIZE + tx_info->iv_size : 0);
1367
1368 cpl->op_ivinsrtofst =
1369 htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) |
1370 CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) |
1371 CPL_TX_SEC_PDU_IVINSRTOFST_V(1));
1372 cpl->pldlen = htonl(data_len + AES_BLOCK_LEN + prior_data_len);
1373 cpl->aadstart_cipherstop_hi =
1374 htonl(CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start));
1375 cpl->cipherstop_lo_authinsert = 0;
1376 /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */
1377 cpl->seqno_numivs = htonl(tx_info->scmd0_short_seqno_numivs);
1378 cpl->ivgen_hdrlen = htonl(tx_info->scmd0_short_ivgen_hdrlen);
1379 cpl->scmd1 = 0;
1380
1381 pos = cpl + 1;
1382 /* check if space left to fill the keys */
1383 left = (void *)q->q.stat - pos;
1384 if (!left) {
1385 left = (void *)end - (void *)q->q.stat;
1386 pos = q->q.desc;
1387 end = pos + left;
1388 }
1389
1390 pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos,
1391 tx_info->key_ctx_len);
1392 left = (void *)q->q.stat - pos;
1393
1394 if (!left) {
1395 left = (void *)end - (void *)q->q.stat;
1396 pos = q->q.desc;
1397 end = pos + left;
1398 }
1399 /* CPL_TX_DATA */
1400 tx_data = (void *)pos;
1401 OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid));
1402 tx_data->len = htonl(TX_DATA_MSS_V(mss) |
1403 TX_LENGTH_V(data_len + prior_data_len));
1404 tx_data->rsvd = htonl(tcp_seq);
1405 tx_data->flags = htonl(TX_BYPASS_F);
1406 if (tcp_push)
1407 tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F);
1408
1409 /* check left again, it might go beyond queue limit */
1410 pos = tx_data + 1;
1411 left = (void *)q->q.stat - pos;
1412
1413 /* check the position again */
1414 if (!left) {
1415 left = (void *)end - (void *)q->q.stat;
1416 pos = q->q.desc;
1417 end = pos + left;
1418 }
1419 /* copy the 16 byte IV for AES-CTR, which includes 4 bytes of salt, 8
1420 * bytes of actual IV and 4 bytes of 16 byte-sequence.
1421 */
1422 memcpy(pos, tx_info->key_ctx.salt, tx_info->salt_size);
1423 memcpy(pos + tx_info->salt_size, &iv_record, tx_info->iv_size);
1424 *(__be32 *)(pos + tx_info->salt_size + tx_info->iv_size) =
1425 htonl(2 + (tls_rec_offset ? ((tls_rec_offset -
1426 (TLS_HEADER_SIZE + tx_info->iv_size)) / AES_BLOCK_LEN) : 0));
1427
1428 pos += 16;
1429 /* Prior_data_len will always be less than 16 bytes, fill the
1430 * prio_data_len after AES_CTRL_BLOCK and clear the remaining length
1431 * to 0.
1432 */
1433 if (prior_data_len)
1434 pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16);
1435 /* send the complete packet except the header */
1436 cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr,
1437 skb_offset, data_len);
1438 sgl_sdesc->skb = skb;
1439
1440 chcr_txq_advance(&q->q, ndesc);
1441 cxgb4_ring_tx_db(adap, &q->q, ndesc);
1442
1443 return 0;
1444 }
1445
1446 /*
1447 * chcr_ktls_tx_plaintxt: This handler will take care of the records which has
1448 * only plain text (only tls header and iv)
1449 * @tx_info - driver specific tls info.
1450 * @skb - skb contains partial record..
1451 * @tcp_seq
1452 * @mss - segment size.
1453 * @tcp_push - tcp push bit.
1454 * @q - TX queue.
1455 * @port_id : port number
1456 * @perior_data - data before the current segment, required to make this record
1457 * 16 byte aligned.
1458 * @prior_data_len - prior_data length (less than 16)
1459 * return: NETDEV_TX_BUSY/NET_TX_OK.
1460 */
chcr_ktls_tx_plaintxt(struct chcr_ktls_info * tx_info,struct sk_buff * skb,u32 tcp_seq,u32 mss,bool tcp_push,struct sge_eth_txq * q,u32 port_id,u8 * prior_data,u32 data_len,u32 skb_offset,u32 prior_data_len)1461 static int chcr_ktls_tx_plaintxt(struct chcr_ktls_info *tx_info,
1462 struct sk_buff *skb, u32 tcp_seq, u32 mss,
1463 bool tcp_push, struct sge_eth_txq *q,
1464 u32 port_id, u8 *prior_data,
1465 u32 data_len, u32 skb_offset,
1466 u32 prior_data_len)
1467 {
1468 int credits, left, len16, last_desc;
1469 unsigned int flits = 0, ndesc;
1470 struct tx_sw_desc *sgl_sdesc;
1471 struct cpl_tx_data *tx_data;
1472 struct ulptx_idata *idata;
1473 struct ulp_txpkt *ulptx;
1474 struct fw_ulptx_wr *wr;
1475 u32 wr_mid = 0, nfrags;
1476 void *pos;
1477 u64 *end;
1478
1479 flits = DIV_ROUND_UP(CHCR_PLAIN_TX_DATA_LEN, 8);
1480 nfrags = chcr_get_nfrags_to_send(skb, skb_offset, data_len);
1481 flits += chcr_sgl_len(nfrags);
1482 if (prior_data_len)
1483 flits += 2;
1484
1485 /* WR will need len16 */
1486 len16 = DIV_ROUND_UP(flits, 2);
1487 /* check how many descriptors needed */
1488 ndesc = DIV_ROUND_UP(flits, 8);
1489
1490 credits = chcr_txq_avail(&q->q) - ndesc;
1491 if (unlikely(credits < 0)) {
1492 chcr_eth_txq_stop(q);
1493 return NETDEV_TX_BUSY;
1494 }
1495
1496 if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1497 chcr_eth_txq_stop(q);
1498 wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1499 }
1500
1501 last_desc = q->q.pidx + ndesc - 1;
1502 if (last_desc >= q->q.size)
1503 last_desc -= q->q.size;
1504 sgl_sdesc = &q->q.sdesc[last_desc];
1505
1506 if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb,
1507 sgl_sdesc->addr) < 0)) {
1508 memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr));
1509 q->mapping_err++;
1510 return NETDEV_TX_BUSY;
1511 }
1512
1513 pos = &q->q.desc[q->q.pidx];
1514 end = (u64 *)pos + flits;
1515 /* FW_ULPTX_WR */
1516 wr = pos;
1517 wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
1518 wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1519 wr->cookie = 0;
1520 /* ULP_TXPKT */
1521 ulptx = (struct ulp_txpkt *)(wr + 1);
1522 ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
1523 ULP_TXPKT_DATAMODIFY_V(0) |
1524 ULP_TXPKT_CHANNELID_V(tx_info->port_id) |
1525 ULP_TXPKT_DEST_V(0) |
1526 ULP_TXPKT_FID_V(q->q.cntxt_id) | ULP_TXPKT_RO_V(1));
1527 ulptx->len = htonl(len16 - 1);
1528 /* ULPTX_IDATA sub-command */
1529 idata = (struct ulptx_idata *)(ulptx + 1);
1530 idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F);
1531 idata->len = htonl(sizeof(*tx_data) + prior_data_len);
1532 /* CPL_TX_DATA */
1533 tx_data = (struct cpl_tx_data *)(idata + 1);
1534 OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid));
1535 tx_data->len = htonl(TX_DATA_MSS_V(mss) |
1536 TX_LENGTH_V(data_len + prior_data_len));
1537 /* set tcp seq number */
1538 tx_data->rsvd = htonl(tcp_seq);
1539 tx_data->flags = htonl(TX_BYPASS_F);
1540 if (tcp_push)
1541 tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F);
1542
1543 pos = tx_data + 1;
1544 /* apart from prior_data_len, we should set remaining part of 16 bytes
1545 * to be zero.
1546 */
1547 if (prior_data_len)
1548 pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16);
1549
1550 /* check left again, it might go beyond queue limit */
1551 left = (void *)q->q.stat - pos;
1552
1553 /* check the position again */
1554 if (!left) {
1555 left = (void *)end - (void *)q->q.stat;
1556 pos = q->q.desc;
1557 end = pos + left;
1558 }
1559 /* send the complete packet including the header */
1560 cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr,
1561 skb_offset, data_len);
1562 sgl_sdesc->skb = skb;
1563
1564 chcr_txq_advance(&q->q, ndesc);
1565 cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc);
1566 return 0;
1567 }
1568
chcr_ktls_tunnel_pkt(struct chcr_ktls_info * tx_info,struct sk_buff * skb,struct sge_eth_txq * q)1569 static int chcr_ktls_tunnel_pkt(struct chcr_ktls_info *tx_info,
1570 struct sk_buff *skb,
1571 struct sge_eth_txq *q)
1572 {
1573 u32 ctrl, iplen, maclen, wr_mid = 0, len16;
1574 struct tx_sw_desc *sgl_sdesc;
1575 struct fw_eth_tx_pkt_wr *wr;
1576 struct cpl_tx_pkt_core *cpl;
1577 unsigned int flits, ndesc;
1578 int credits, last_desc;
1579 u64 cntrl1, *end;
1580 void *pos;
1581
1582 ctrl = sizeof(*cpl);
1583 flits = DIV_ROUND_UP(sizeof(*wr) + ctrl, 8);
1584
1585 flits += chcr_sgl_len(skb_shinfo(skb)->nr_frags + 1);
1586 len16 = DIV_ROUND_UP(flits, 2);
1587 /* check how many descriptors needed */
1588 ndesc = DIV_ROUND_UP(flits, 8);
1589
1590 credits = chcr_txq_avail(&q->q) - ndesc;
1591 if (unlikely(credits < 0)) {
1592 chcr_eth_txq_stop(q);
1593 return -ENOMEM;
1594 }
1595
1596 if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1597 chcr_eth_txq_stop(q);
1598 wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1599 }
1600
1601 last_desc = q->q.pidx + ndesc - 1;
1602 if (last_desc >= q->q.size)
1603 last_desc -= q->q.size;
1604 sgl_sdesc = &q->q.sdesc[last_desc];
1605
1606 if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb,
1607 sgl_sdesc->addr) < 0)) {
1608 memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr));
1609 q->mapping_err++;
1610 return -ENOMEM;
1611 }
1612
1613 iplen = skb_network_header_len(skb);
1614 maclen = skb_mac_header_len(skb);
1615
1616 pos = &q->q.desc[q->q.pidx];
1617 end = (u64 *)pos + flits;
1618 wr = pos;
1619
1620 /* Firmware work request header */
1621 wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) |
1622 FW_WR_IMMDLEN_V(ctrl));
1623
1624 wr->equiq_to_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1625 wr->r3 = 0;
1626
1627 cpl = (void *)(wr + 1);
1628
1629 /* CPL header */
1630 cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) |
1631 TXPKT_INTF_V(tx_info->tx_chan) |
1632 TXPKT_PF_V(tx_info->adap->pf));
1633 cpl->pack = 0;
1634 cntrl1 = TXPKT_CSUM_TYPE_V(tx_info->ip_family == AF_INET ?
1635 TX_CSUM_TCPIP : TX_CSUM_TCPIP6);
1636 cntrl1 |= T6_TXPKT_ETHHDR_LEN_V(maclen - ETH_HLEN) |
1637 TXPKT_IPHDR_LEN_V(iplen);
1638 /* checksum offload */
1639 cpl->ctrl1 = cpu_to_be64(cntrl1);
1640 cpl->len = htons(skb->len);
1641
1642 pos = cpl + 1;
1643
1644 cxgb4_write_sgl(skb, &q->q, pos, end, 0, sgl_sdesc->addr);
1645 sgl_sdesc->skb = skb;
1646 chcr_txq_advance(&q->q, ndesc);
1647 cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc);
1648 return 0;
1649 }
1650
1651 /*
1652 * chcr_ktls_copy_record_in_skb
1653 * @nskb - new skb where the frags to be added.
1654 * @skb - old skb, to copy socket and destructor details.
1655 * @record - specific record which has complete 16k record in frags.
1656 */
chcr_ktls_copy_record_in_skb(struct sk_buff * nskb,struct sk_buff * skb,struct tls_record_info * record)1657 static void chcr_ktls_copy_record_in_skb(struct sk_buff *nskb,
1658 struct sk_buff *skb,
1659 struct tls_record_info *record)
1660 {
1661 int i = 0;
1662
1663 for (i = 0; i < record->num_frags; i++) {
1664 skb_shinfo(nskb)->frags[i] = record->frags[i];
1665 /* increase the frag ref count */
1666 __skb_frag_ref(&skb_shinfo(nskb)->frags[i]);
1667 }
1668
1669 skb_shinfo(nskb)->nr_frags = record->num_frags;
1670 nskb->data_len = record->len;
1671 nskb->len += record->len;
1672 nskb->truesize += record->len;
1673 nskb->sk = skb->sk;
1674 nskb->destructor = skb->destructor;
1675 refcount_add(nskb->truesize, &nskb->sk->sk_wmem_alloc);
1676 }
1677
1678 /*
1679 * chcr_end_part_handler: This handler will handle the record which
1680 * is complete or if record's end part is received. T6 adapter has a issue that
1681 * it can't send out TAG with partial record so if its an end part then we have
1682 * to send TAG as well and for which we need to fetch the complete record and
1683 * send it to crypto module.
1684 * @tx_info - driver specific tls info.
1685 * @skb - skb contains partial record.
1686 * @record - complete record of 16K size.
1687 * @tcp_seq
1688 * @mss - segment size in which TP needs to chop a packet.
1689 * @tcp_push_no_fin - tcp push if fin is not set.
1690 * @q - TX queue.
1691 * @tls_end_offset - offset from end of the record.
1692 * @last wr : check if this is the last part of the skb going out.
1693 * return: NETDEV_TX_OK/NETDEV_TX_BUSY.
1694 */
chcr_end_part_handler(struct chcr_ktls_info * tx_info,struct sk_buff * skb,struct tls_record_info * record,u32 tcp_seq,int mss,bool tcp_push_no_fin,struct sge_eth_txq * q,u32 skb_offset,u32 tls_end_offset,bool last_wr)1695 static int chcr_end_part_handler(struct chcr_ktls_info *tx_info,
1696 struct sk_buff *skb,
1697 struct tls_record_info *record,
1698 u32 tcp_seq, int mss, bool tcp_push_no_fin,
1699 struct sge_eth_txq *q, u32 skb_offset,
1700 u32 tls_end_offset, bool last_wr)
1701 {
1702 bool free_skb_if_tx_fails = false;
1703 struct sk_buff *nskb = NULL;
1704
1705 /* check if it is a complete record */
1706 if (tls_end_offset == record->len) {
1707 nskb = skb;
1708 atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_complete_pkts);
1709 } else {
1710 nskb = alloc_skb(0, GFP_ATOMIC);
1711 if (!nskb) {
1712 dev_kfree_skb_any(skb);
1713 return NETDEV_TX_BUSY;
1714 }
1715
1716 /* copy complete record in skb */
1717 chcr_ktls_copy_record_in_skb(nskb, skb, record);
1718 /* packet is being sent from the beginning, update the tcp_seq
1719 * accordingly.
1720 */
1721 tcp_seq = tls_record_start_seq(record);
1722 /* reset skb offset */
1723 skb_offset = 0;
1724
1725 if (last_wr)
1726 dev_kfree_skb_any(skb);
1727 else
1728 free_skb_if_tx_fails = true;
1729
1730 last_wr = true;
1731
1732 atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_end_pkts);
1733 }
1734
1735 if (chcr_ktls_xmit_wr_complete(nskb, tx_info, q, tcp_seq,
1736 last_wr, record->len, skb_offset,
1737 record->num_frags,
1738 (last_wr && tcp_push_no_fin),
1739 mss)) {
1740 if (free_skb_if_tx_fails)
1741 dev_kfree_skb_any(skb);
1742 goto out;
1743 }
1744 tx_info->prev_seq = record->end_seq;
1745 return 0;
1746 out:
1747 dev_kfree_skb_any(nskb);
1748 return NETDEV_TX_BUSY;
1749 }
1750
1751 /*
1752 * chcr_short_record_handler: This handler will take care of the records which
1753 * doesn't have end part (1st part or the middle part(/s) of a record). In such
1754 * cases, AES CTR will be used in place of AES GCM to send out partial packet.
1755 * This partial record might be the first part of the record, or the middle
1756 * part. In case of middle record we should fetch the prior data to make it 16
1757 * byte aligned. If it has a partial tls header or iv then get to the start of
1758 * tls header. And if it has partial TAG, then remove the complete TAG and send
1759 * only the payload.
1760 * There is one more possibility that it gets a partial header, send that
1761 * portion as a plaintext.
1762 * @tx_info - driver specific tls info.
1763 * @skb - skb contains partial record..
1764 * @record - complete record of 16K size.
1765 * @tcp_seq
1766 * @mss - segment size in which TP needs to chop a packet.
1767 * @tcp_push_no_fin - tcp push if fin is not set.
1768 * @q - TX queue.
1769 * @tls_end_offset - offset from end of the record.
1770 * return: NETDEV_TX_OK/NETDEV_TX_BUSY.
1771 */
chcr_short_record_handler(struct chcr_ktls_info * tx_info,struct sk_buff * skb,struct tls_record_info * record,u32 tcp_seq,int mss,bool tcp_push_no_fin,u32 data_len,u32 skb_offset,struct sge_eth_txq * q,u32 tls_end_offset)1772 static int chcr_short_record_handler(struct chcr_ktls_info *tx_info,
1773 struct sk_buff *skb,
1774 struct tls_record_info *record,
1775 u32 tcp_seq, int mss, bool tcp_push_no_fin,
1776 u32 data_len, u32 skb_offset,
1777 struct sge_eth_txq *q, u32 tls_end_offset)
1778 {
1779 u32 tls_rec_offset = tcp_seq - tls_record_start_seq(record);
1780 u8 prior_data[16] = {0};
1781 u32 prior_data_len = 0;
1782
1783 /* check if the skb is ending in middle of tag/HASH, its a big
1784 * trouble, send the packet before the HASH.
1785 */
1786 int remaining_record = tls_end_offset - data_len;
1787
1788 if (remaining_record > 0 &&
1789 remaining_record < TLS_CIPHER_AES_GCM_128_TAG_SIZE) {
1790 int trimmed_len = 0;
1791
1792 if (tls_end_offset > TLS_CIPHER_AES_GCM_128_TAG_SIZE)
1793 trimmed_len = data_len -
1794 (TLS_CIPHER_AES_GCM_128_TAG_SIZE -
1795 remaining_record);
1796 if (!trimmed_len)
1797 return FALLBACK;
1798
1799 WARN_ON(trimmed_len > data_len);
1800
1801 data_len = trimmed_len;
1802 atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_trimmed_pkts);
1803 }
1804
1805 /* check if it is only the header part. */
1806 if (tls_rec_offset + data_len <= (TLS_HEADER_SIZE + tx_info->iv_size)) {
1807 if (chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss,
1808 tcp_push_no_fin, q,
1809 tx_info->port_id, prior_data,
1810 data_len, skb_offset, prior_data_len))
1811 goto out;
1812
1813 tx_info->prev_seq = tcp_seq + data_len;
1814 return 0;
1815 }
1816
1817 /* check if the middle record's start point is 16 byte aligned. CTR
1818 * needs 16 byte aligned start point to start encryption.
1819 */
1820 if (tls_rec_offset) {
1821 /* there is an offset from start, means its a middle record */
1822 int remaining = 0;
1823
1824 if (tls_rec_offset < (TLS_HEADER_SIZE + tx_info->iv_size)) {
1825 prior_data_len = tls_rec_offset;
1826 tls_rec_offset = 0;
1827 remaining = 0;
1828 } else {
1829 prior_data_len =
1830 (tls_rec_offset -
1831 (TLS_HEADER_SIZE + tx_info->iv_size))
1832 % AES_BLOCK_LEN;
1833 remaining = tls_rec_offset - prior_data_len;
1834 }
1835
1836 /* if prior_data_len is not zero, means we need to fetch prior
1837 * data to make this record 16 byte aligned, or we need to reach
1838 * to start offset.
1839 */
1840 if (prior_data_len) {
1841 int i = 0;
1842 skb_frag_t *f;
1843 int frag_size = 0, frag_delta = 0;
1844
1845 while (remaining > 0) {
1846 frag_size = skb_frag_size(&record->frags[i]);
1847 if (remaining < frag_size)
1848 break;
1849
1850 remaining -= frag_size;
1851 i++;
1852 }
1853 f = &record->frags[i];
1854 frag_delta = skb_frag_size(f) - remaining;
1855
1856 if (frag_delta >= prior_data_len) {
1857 memcpy_from_page(prior_data, skb_frag_page(f),
1858 skb_frag_off(f) + remaining,
1859 prior_data_len);
1860 } else {
1861 memcpy_from_page(prior_data, skb_frag_page(f),
1862 skb_frag_off(f) + remaining,
1863 frag_delta);
1864
1865 /* get the next page */
1866 f = &record->frags[i + 1];
1867
1868 memcpy_from_page(prior_data + frag_delta,
1869 skb_frag_page(f),
1870 skb_frag_off(f),
1871 prior_data_len - frag_delta);
1872 }
1873 /* reset tcp_seq as per the prior_data_required len */
1874 tcp_seq -= prior_data_len;
1875 }
1876 atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_middle_pkts);
1877 } else {
1878 atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_start_pkts);
1879 }
1880
1881 if (chcr_ktls_xmit_wr_short(skb, tx_info, q, tcp_seq, tcp_push_no_fin,
1882 mss, tls_rec_offset, prior_data,
1883 prior_data_len, data_len, skb_offset)) {
1884 goto out;
1885 }
1886
1887 tx_info->prev_seq = tcp_seq + data_len + prior_data_len;
1888 return 0;
1889 out:
1890 dev_kfree_skb_any(skb);
1891 return NETDEV_TX_BUSY;
1892 }
1893
chcr_ktls_sw_fallback(struct sk_buff * skb,struct chcr_ktls_info * tx_info,struct sge_eth_txq * q)1894 static int chcr_ktls_sw_fallback(struct sk_buff *skb,
1895 struct chcr_ktls_info *tx_info,
1896 struct sge_eth_txq *q)
1897 {
1898 u32 data_len, skb_offset;
1899 struct sk_buff *nskb;
1900 struct tcphdr *th;
1901
1902 nskb = tls_encrypt_skb(skb);
1903
1904 if (!nskb)
1905 return 0;
1906
1907 th = tcp_hdr(nskb);
1908 skb_offset = skb_tcp_all_headers(nskb);
1909 data_len = nskb->len - skb_offset;
1910 skb_tx_timestamp(nskb);
1911
1912 if (chcr_ktls_tunnel_pkt(tx_info, nskb, q))
1913 goto out;
1914
1915 tx_info->prev_seq = ntohl(th->seq) + data_len;
1916 atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_fallback);
1917 return 0;
1918 out:
1919 dev_kfree_skb_any(nskb);
1920 return 0;
1921 }
1922 /* nic tls TX handler */
chcr_ktls_xmit(struct sk_buff * skb,struct net_device * dev)1923 static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
1924 {
1925 u32 tls_end_offset, tcp_seq, skb_data_len, skb_offset;
1926 struct ch_ktls_port_stats_debug *port_stats;
1927 struct chcr_ktls_ofld_ctx_tx *tx_ctx;
1928 struct ch_ktls_stats_debug *stats;
1929 struct tcphdr *th = tcp_hdr(skb);
1930 int data_len, qidx, ret = 0, mss;
1931 struct tls_record_info *record;
1932 struct chcr_ktls_info *tx_info;
1933 struct net_device *tls_netdev;
1934 struct tls_context *tls_ctx;
1935 struct sge_eth_txq *q;
1936 struct adapter *adap;
1937 unsigned long flags;
1938
1939 tcp_seq = ntohl(th->seq);
1940 skb_offset = skb_tcp_all_headers(skb);
1941 skb_data_len = skb->len - skb_offset;
1942 data_len = skb_data_len;
1943
1944 mss = skb_is_gso(skb) ? skb_shinfo(skb)->gso_size : data_len;
1945
1946 tls_ctx = tls_get_ctx(skb->sk);
1947 tls_netdev = rcu_dereference_bh(tls_ctx->netdev);
1948 /* Don't quit on NULL: if tls_device_down is running in parallel,
1949 * netdev might become NULL, even if tls_is_skb_tx_device_offloaded was
1950 * true. Rather continue processing this packet.
1951 */
1952 if (unlikely(tls_netdev && tls_netdev != dev))
1953 goto out;
1954
1955 tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
1956 tx_info = tx_ctx->chcr_info;
1957
1958 if (unlikely(!tx_info))
1959 goto out;
1960
1961 adap = tx_info->adap;
1962 stats = &adap->ch_ktls_stats;
1963 port_stats = &stats->ktls_port[tx_info->port_id];
1964
1965 qidx = skb->queue_mapping;
1966 q = &adap->sge.ethtxq[qidx + tx_info->first_qset];
1967 cxgb4_reclaim_completed_tx(adap, &q->q, true);
1968 /* if tcp options are set but finish is not send the options first */
1969 if (!th->fin && chcr_ktls_check_tcp_options(th)) {
1970 ret = chcr_ktls_write_tcp_options(tx_info, skb, q,
1971 tx_info->tx_chan);
1972 if (ret)
1973 return NETDEV_TX_BUSY;
1974 }
1975
1976 /* TCP segments can be in received either complete or partial.
1977 * chcr_end_part_handler will handle cases if complete record or end
1978 * part of the record is received. In case of partial end part of record,
1979 * we will send the complete record again.
1980 */
1981
1982 spin_lock_irqsave(&tx_ctx->base.lock, flags);
1983
1984 do {
1985
1986 cxgb4_reclaim_completed_tx(adap, &q->q, true);
1987 /* fetch the tls record */
1988 record = tls_get_record(&tx_ctx->base, tcp_seq,
1989 &tx_info->record_no);
1990 /* By the time packet reached to us, ACK is received, and record
1991 * won't be found in that case, handle it gracefully.
1992 */
1993 if (unlikely(!record)) {
1994 spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
1995 atomic64_inc(&port_stats->ktls_tx_drop_no_sync_data);
1996 goto out;
1997 }
1998
1999 tls_end_offset = record->end_seq - tcp_seq;
2000
2001 pr_debug("seq 0x%x, end_seq 0x%x prev_seq 0x%x, datalen 0x%x\n",
2002 tcp_seq, record->end_seq, tx_info->prev_seq, data_len);
2003 /* update tcb for the skb */
2004 if (skb_data_len == data_len) {
2005 u32 tx_max = tcp_seq;
2006
2007 if (!tls_record_is_start_marker(record) &&
2008 tls_end_offset < TLS_CIPHER_AES_GCM_128_TAG_SIZE)
2009 tx_max = record->end_seq -
2010 TLS_CIPHER_AES_GCM_128_TAG_SIZE;
2011
2012 ret = chcr_ktls_xmit_tcb_cpls(tx_info, q, tx_max,
2013 ntohl(th->ack_seq),
2014 ntohs(th->window),
2015 tls_end_offset !=
2016 record->len);
2017 if (ret) {
2018 spin_unlock_irqrestore(&tx_ctx->base.lock,
2019 flags);
2020 goto out;
2021 }
2022
2023 if (th->fin)
2024 skb_get(skb);
2025 }
2026
2027 if (unlikely(tls_record_is_start_marker(record))) {
2028 atomic64_inc(&port_stats->ktls_tx_skip_no_sync_data);
2029 /* If tls_end_offset < data_len, means there is some
2030 * data after start marker, which needs encryption, send
2031 * plaintext first and take skb refcount. else send out
2032 * complete pkt as plaintext.
2033 */
2034 if (tls_end_offset < data_len)
2035 skb_get(skb);
2036 else
2037 tls_end_offset = data_len;
2038
2039 ret = chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss,
2040 (!th->fin && th->psh), q,
2041 tx_info->port_id, NULL,
2042 tls_end_offset, skb_offset,
2043 0);
2044
2045 if (ret) {
2046 /* free the refcount taken earlier */
2047 if (tls_end_offset < data_len)
2048 dev_kfree_skb_any(skb);
2049 spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
2050 goto out;
2051 }
2052
2053 data_len -= tls_end_offset;
2054 tcp_seq = record->end_seq;
2055 skb_offset += tls_end_offset;
2056 continue;
2057 }
2058
2059 /* if a tls record is finishing in this SKB */
2060 if (tls_end_offset <= data_len) {
2061 ret = chcr_end_part_handler(tx_info, skb, record,
2062 tcp_seq, mss,
2063 (!th->fin && th->psh), q,
2064 skb_offset,
2065 tls_end_offset,
2066 skb_offset +
2067 tls_end_offset == skb->len);
2068
2069 data_len -= tls_end_offset;
2070 /* tcp_seq increment is required to handle next record.
2071 */
2072 tcp_seq += tls_end_offset;
2073 skb_offset += tls_end_offset;
2074 } else {
2075 ret = chcr_short_record_handler(tx_info, skb,
2076 record, tcp_seq, mss,
2077 (!th->fin && th->psh),
2078 data_len, skb_offset,
2079 q, tls_end_offset);
2080 data_len = 0;
2081 }
2082
2083 /* if any failure, come out from the loop. */
2084 if (ret) {
2085 spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
2086 if (th->fin)
2087 dev_kfree_skb_any(skb);
2088
2089 if (ret == FALLBACK)
2090 return chcr_ktls_sw_fallback(skb, tx_info, q);
2091
2092 return NETDEV_TX_OK;
2093 }
2094
2095 /* length should never be less than 0 */
2096 WARN_ON(data_len < 0);
2097
2098 } while (data_len > 0);
2099
2100 spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
2101 atomic64_inc(&port_stats->ktls_tx_encrypted_packets);
2102 atomic64_add(skb_data_len, &port_stats->ktls_tx_encrypted_bytes);
2103
2104 /* tcp finish is set, send a separate tcp msg including all the options
2105 * as well.
2106 */
2107 if (th->fin) {
2108 chcr_ktls_write_tcp_options(tx_info, skb, q, tx_info->tx_chan);
2109 dev_kfree_skb_any(skb);
2110 }
2111
2112 return NETDEV_TX_OK;
2113 out:
2114 dev_kfree_skb_any(skb);
2115 return NETDEV_TX_OK;
2116 }
2117
chcr_ktls_uld_add(const struct cxgb4_lld_info * lldi)2118 static void *chcr_ktls_uld_add(const struct cxgb4_lld_info *lldi)
2119 {
2120 struct chcr_ktls_uld_ctx *u_ctx;
2121
2122 pr_info_once("%s - version %s\n", CHCR_KTLS_DRV_DESC,
2123 CHCR_KTLS_DRV_VERSION);
2124 u_ctx = kzalloc(sizeof(*u_ctx), GFP_KERNEL);
2125 if (!u_ctx) {
2126 u_ctx = ERR_PTR(-ENOMEM);
2127 goto out;
2128 }
2129 u_ctx->lldi = *lldi;
2130 u_ctx->detach = false;
2131 xa_init_flags(&u_ctx->tid_list, XA_FLAGS_LOCK_BH);
2132 out:
2133 return u_ctx;
2134 }
2135
2136 static const struct tlsdev_ops chcr_ktls_ops = {
2137 .tls_dev_add = chcr_ktls_dev_add,
2138 .tls_dev_del = chcr_ktls_dev_del,
2139 };
2140
2141 static chcr_handler_func work_handlers[NUM_CPL_CMDS] = {
2142 [CPL_ACT_OPEN_RPL] = chcr_ktls_cpl_act_open_rpl,
2143 [CPL_SET_TCB_RPL] = chcr_ktls_cpl_set_tcb_rpl,
2144 };
2145
chcr_ktls_uld_rx_handler(void * handle,const __be64 * rsp,const struct pkt_gl * pgl)2146 static int chcr_ktls_uld_rx_handler(void *handle, const __be64 *rsp,
2147 const struct pkt_gl *pgl)
2148 {
2149 const struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)rsp;
2150 struct chcr_ktls_uld_ctx *u_ctx = handle;
2151 u8 opcode = rpl->ot.opcode;
2152 struct adapter *adap;
2153
2154 adap = pci_get_drvdata(u_ctx->lldi.pdev);
2155
2156 if (!work_handlers[opcode]) {
2157 pr_err("Unsupported opcode %d received\n", opcode);
2158 return 0;
2159 }
2160
2161 work_handlers[opcode](adap, (unsigned char *)&rsp[1]);
2162 return 0;
2163 }
2164
clear_conn_resources(struct chcr_ktls_info * tx_info)2165 static void clear_conn_resources(struct chcr_ktls_info *tx_info)
2166 {
2167 /* clear l2t entry */
2168 if (tx_info->l2te)
2169 cxgb4_l2t_release(tx_info->l2te);
2170
2171 #if IS_ENABLED(CONFIG_IPV6)
2172 /* clear clip entry */
2173 if (tx_info->ip_family == AF_INET6)
2174 cxgb4_clip_release(tx_info->netdev, (const u32 *)
2175 &tx_info->sk->sk_v6_rcv_saddr,
2176 1);
2177 #endif
2178
2179 /* clear tid */
2180 if (tx_info->tid != -1)
2181 cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan,
2182 tx_info->tid, tx_info->ip_family);
2183 }
2184
ch_ktls_reset_all_conn(struct chcr_ktls_uld_ctx * u_ctx)2185 static void ch_ktls_reset_all_conn(struct chcr_ktls_uld_ctx *u_ctx)
2186 {
2187 struct ch_ktls_port_stats_debug *port_stats;
2188 struct chcr_ktls_ofld_ctx_tx *tx_ctx;
2189 struct chcr_ktls_info *tx_info;
2190 unsigned long index;
2191
2192 xa_for_each(&u_ctx->tid_list, index, tx_ctx) {
2193 tx_info = tx_ctx->chcr_info;
2194 clear_conn_resources(tx_info);
2195 port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id];
2196 atomic64_inc(&port_stats->ktls_tx_connection_close);
2197 kvfree(tx_info);
2198 tx_ctx->chcr_info = NULL;
2199 /* release module refcount */
2200 module_put(THIS_MODULE);
2201 }
2202 }
2203
chcr_ktls_uld_state_change(void * handle,enum cxgb4_state new_state)2204 static int chcr_ktls_uld_state_change(void *handle, enum cxgb4_state new_state)
2205 {
2206 struct chcr_ktls_uld_ctx *u_ctx = handle;
2207
2208 switch (new_state) {
2209 case CXGB4_STATE_UP:
2210 pr_info("%s: Up\n", pci_name(u_ctx->lldi.pdev));
2211 mutex_lock(&dev_mutex);
2212 list_add_tail(&u_ctx->entry, &uld_ctx_list);
2213 mutex_unlock(&dev_mutex);
2214 break;
2215 case CXGB4_STATE_START_RECOVERY:
2216 case CXGB4_STATE_DOWN:
2217 case CXGB4_STATE_DETACH:
2218 pr_info("%s: Down\n", pci_name(u_ctx->lldi.pdev));
2219 mutex_lock(&dev_mutex);
2220 u_ctx->detach = true;
2221 list_del(&u_ctx->entry);
2222 ch_ktls_reset_all_conn(u_ctx);
2223 xa_destroy(&u_ctx->tid_list);
2224 mutex_unlock(&dev_mutex);
2225 break;
2226 default:
2227 break;
2228 }
2229
2230 return 0;
2231 }
2232
2233 static struct cxgb4_uld_info chcr_ktls_uld_info = {
2234 .name = CHCR_KTLS_DRV_MODULE_NAME,
2235 .nrxq = 1,
2236 .rxq_size = 1024,
2237 .add = chcr_ktls_uld_add,
2238 .tx_handler = chcr_ktls_xmit,
2239 .rx_handler = chcr_ktls_uld_rx_handler,
2240 .state_change = chcr_ktls_uld_state_change,
2241 .tlsdev_ops = &chcr_ktls_ops,
2242 };
2243
chcr_ktls_init(void)2244 static int __init chcr_ktls_init(void)
2245 {
2246 cxgb4_register_uld(CXGB4_ULD_KTLS, &chcr_ktls_uld_info);
2247 return 0;
2248 }
2249
chcr_ktls_exit(void)2250 static void __exit chcr_ktls_exit(void)
2251 {
2252 struct chcr_ktls_uld_ctx *u_ctx, *tmp;
2253 struct adapter *adap;
2254
2255 pr_info("driver unloaded\n");
2256
2257 mutex_lock(&dev_mutex);
2258 list_for_each_entry_safe(u_ctx, tmp, &uld_ctx_list, entry) {
2259 adap = pci_get_drvdata(u_ctx->lldi.pdev);
2260 memset(&adap->ch_ktls_stats, 0, sizeof(adap->ch_ktls_stats));
2261 list_del(&u_ctx->entry);
2262 xa_destroy(&u_ctx->tid_list);
2263 kfree(u_ctx);
2264 }
2265 mutex_unlock(&dev_mutex);
2266 cxgb4_unregister_uld(CXGB4_ULD_KTLS);
2267 }
2268
2269 module_init(chcr_ktls_init);
2270 module_exit(chcr_ktls_exit);
2271
2272 MODULE_DESCRIPTION("Chelsio NIC TLS ULD driver");
2273 MODULE_LICENSE("GPL");
2274 MODULE_AUTHOR("Chelsio Communications");
2275 MODULE_VERSION(CHCR_KTLS_DRV_VERSION);
2276