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34aba2c4 RM |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* Copyright (C) 2020 Chelsio Communications. All rights reserved. */ | |
3 | ||
4 | #ifdef CONFIG_CHELSIO_TLS_DEVICE | |
21f6f946 | 5 | #include <linux/highmem.h> |
34aba2c4 | 6 | #include "chcr_ktls.h" |
62370a4f | 7 | #include "clip_tbl.h" |
34aba2c4 | 8 | |
8a30923e RM |
9 | static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info); |
10 | /* | |
11 | * chcr_ktls_save_keys: calculate and save crypto keys. | |
12 | * @tx_info - driver specific tls info. | |
13 | * @crypto_info - tls crypto information. | |
14 | * @direction - TX/RX direction. | |
15 | * return - SUCCESS/FAILURE. | |
16 | */ | |
17 | static int chcr_ktls_save_keys(struct chcr_ktls_info *tx_info, | |
18 | struct tls_crypto_info *crypto_info, | |
19 | enum tls_offload_ctx_dir direction) | |
20 | { | |
21 | int ck_size, key_ctx_size, mac_key_size, keylen, ghash_size, ret; | |
22 | unsigned char ghash_h[TLS_CIPHER_AES_GCM_256_TAG_SIZE]; | |
23 | struct tls12_crypto_info_aes_gcm_128 *info_128_gcm; | |
24 | struct ktls_key_ctx *kctx = &tx_info->key_ctx; | |
25 | struct crypto_cipher *cipher; | |
26 | unsigned char *key, *salt; | |
27 | ||
28 | switch (crypto_info->cipher_type) { | |
29 | case TLS_CIPHER_AES_GCM_128: | |
30 | info_128_gcm = | |
31 | (struct tls12_crypto_info_aes_gcm_128 *)crypto_info; | |
32 | keylen = TLS_CIPHER_AES_GCM_128_KEY_SIZE; | |
33 | ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; | |
34 | tx_info->salt_size = TLS_CIPHER_AES_GCM_128_SALT_SIZE; | |
35 | mac_key_size = CHCR_KEYCTX_MAC_KEY_SIZE_128; | |
36 | tx_info->iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; | |
37 | tx_info->iv = be64_to_cpu(*(__be64 *)info_128_gcm->iv); | |
38 | ||
39 | ghash_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
40 | key = info_128_gcm->key; | |
41 | salt = info_128_gcm->salt; | |
42 | tx_info->record_no = *(u64 *)info_128_gcm->rec_seq; | |
43 | ||
5a4b9fe7 RM |
44 | /* The SCMD fields used when encrypting a full TLS |
45 | * record. Its a one time calculation till the | |
46 | * connection exists. | |
47 | */ | |
48 | tx_info->scmd0_seqno_numivs = | |
49 | SCMD_SEQ_NO_CTRL_V(CHCR_SCMD_SEQ_NO_CTRL_64BIT) | | |
50 | SCMD_CIPH_AUTH_SEQ_CTRL_F | | |
51 | SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_TLS) | | |
52 | SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_GCM) | | |
53 | SCMD_AUTH_MODE_V(CHCR_SCMD_AUTH_MODE_GHASH) | | |
54 | SCMD_IV_SIZE_V(TLS_CIPHER_AES_GCM_128_IV_SIZE >> 1) | | |
55 | SCMD_NUM_IVS_V(1); | |
56 | ||
57 | /* keys will be sent inline. */ | |
58 | tx_info->scmd0_ivgen_hdrlen = SCMD_KEY_CTX_INLINE_F; | |
59 | ||
dc05f3df RM |
60 | /* The SCMD fields used when encrypting a partial TLS |
61 | * record (no trailer and possibly a truncated payload). | |
62 | */ | |
63 | tx_info->scmd0_short_seqno_numivs = | |
64 | SCMD_CIPH_AUTH_SEQ_CTRL_F | | |
65 | SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_GENERIC) | | |
66 | SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_CTR) | | |
67 | SCMD_IV_SIZE_V(AES_BLOCK_LEN >> 1); | |
68 | ||
69 | tx_info->scmd0_short_ivgen_hdrlen = | |
70 | tx_info->scmd0_ivgen_hdrlen | SCMD_AADIVDROP_F; | |
71 | ||
8a30923e RM |
72 | break; |
73 | ||
74 | default: | |
75 | pr_err("GCM: cipher type 0x%x not supported\n", | |
76 | crypto_info->cipher_type); | |
77 | ret = -EINVAL; | |
78 | goto out; | |
79 | } | |
80 | ||
81 | key_ctx_size = CHCR_KTLS_KEY_CTX_LEN + | |
82 | roundup(keylen, 16) + ghash_size; | |
83 | /* Calculate the H = CIPH(K, 0 repeated 16 times). | |
84 | * It will go in key context | |
85 | */ | |
86 | cipher = crypto_alloc_cipher("aes", 0, 0); | |
87 | if (IS_ERR(cipher)) { | |
88 | ret = -ENOMEM; | |
89 | goto out; | |
90 | } | |
91 | ||
92 | ret = crypto_cipher_setkey(cipher, key, keylen); | |
93 | if (ret) | |
94 | goto out1; | |
95 | ||
96 | memset(ghash_h, 0, ghash_size); | |
97 | crypto_cipher_encrypt_one(cipher, ghash_h, ghash_h); | |
98 | ||
99 | /* fill the Key context */ | |
100 | if (direction == TLS_OFFLOAD_CTX_DIR_TX) { | |
101 | kctx->ctx_hdr = FILL_KEY_CTX_HDR(ck_size, | |
102 | mac_key_size, | |
103 | key_ctx_size >> 4); | |
104 | } else { | |
105 | ret = -EINVAL; | |
106 | goto out1; | |
107 | } | |
108 | ||
109 | memcpy(kctx->salt, salt, tx_info->salt_size); | |
110 | memcpy(kctx->key, key, keylen); | |
111 | memcpy(kctx->key + keylen, ghash_h, ghash_size); | |
112 | tx_info->key_ctx_len = key_ctx_size; | |
113 | ||
114 | out1: | |
115 | crypto_free_cipher(cipher); | |
116 | out: | |
117 | return ret; | |
118 | } | |
119 | ||
120 | static int chcr_ktls_update_connection_state(struct chcr_ktls_info *tx_info, | |
121 | int new_state) | |
122 | { | |
8a30923e RM |
123 | /* This function can be called from both rx (interrupt context) and tx |
124 | * queue contexts. | |
125 | */ | |
d97793af | 126 | spin_lock_bh(&tx_info->lock); |
8a30923e RM |
127 | switch (tx_info->connection_state) { |
128 | case KTLS_CONN_CLOSED: | |
129 | tx_info->connection_state = new_state; | |
130 | break; | |
131 | ||
132 | case KTLS_CONN_ACT_OPEN_REQ: | |
133 | /* only go forward if state is greater than current state. */ | |
134 | if (new_state <= tx_info->connection_state) | |
135 | break; | |
136 | /* update to the next state and also initialize TCB */ | |
137 | tx_info->connection_state = new_state; | |
138 | /* FALLTHRU */ | |
139 | case KTLS_CONN_ACT_OPEN_RPL: | |
140 | /* if we are stuck in this state, means tcb init might not | |
141 | * received by HW, try sending it again. | |
142 | */ | |
143 | if (!chcr_init_tcb_fields(tx_info)) | |
144 | tx_info->connection_state = KTLS_CONN_SET_TCB_REQ; | |
145 | break; | |
146 | ||
147 | case KTLS_CONN_SET_TCB_REQ: | |
148 | /* only go forward if state is greater than current state. */ | |
149 | if (new_state <= tx_info->connection_state) | |
150 | break; | |
151 | /* update to the next state and check if l2t_state is valid */ | |
152 | tx_info->connection_state = new_state; | |
153 | /* FALLTHRU */ | |
154 | case KTLS_CONN_SET_TCB_RPL: | |
155 | /* Check if l2t state is valid, then move to ready state. */ | |
62370a4f | 156 | if (cxgb4_check_l2t_valid(tx_info->l2te)) { |
8a30923e | 157 | tx_info->connection_state = KTLS_CONN_TX_READY; |
62370a4f RM |
158 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_ctx); |
159 | } | |
8a30923e RM |
160 | break; |
161 | ||
162 | case KTLS_CONN_TX_READY: | |
163 | /* nothing to be done here */ | |
164 | break; | |
165 | ||
166 | default: | |
167 | pr_err("unknown KTLS connection state\n"); | |
168 | break; | |
169 | } | |
d97793af | 170 | spin_unlock_bh(&tx_info->lock); |
8a30923e RM |
171 | |
172 | return tx_info->connection_state; | |
173 | } | |
34aba2c4 RM |
174 | /* |
175 | * chcr_ktls_act_open_req: creates TCB entry for ipv4 connection. | |
176 | * @sk - tcp socket. | |
177 | * @tx_info - driver specific tls info. | |
178 | * @atid - connection active tid. | |
179 | * return - send success/failure. | |
180 | */ | |
181 | static int chcr_ktls_act_open_req(struct sock *sk, | |
182 | struct chcr_ktls_info *tx_info, | |
183 | int atid) | |
184 | { | |
185 | struct inet_sock *inet = inet_sk(sk); | |
186 | struct cpl_t6_act_open_req *cpl6; | |
187 | struct cpl_act_open_req *cpl; | |
188 | struct sk_buff *skb; | |
189 | unsigned int len; | |
190 | int qid_atid; | |
191 | u64 options; | |
192 | ||
193 | len = sizeof(*cpl6); | |
194 | skb = alloc_skb(len, GFP_KERNEL); | |
195 | if (unlikely(!skb)) | |
196 | return -ENOMEM; | |
197 | /* mark it a control pkt */ | |
198 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); | |
199 | ||
200 | cpl6 = __skb_put_zero(skb, len); | |
201 | cpl = (struct cpl_act_open_req *)cpl6; | |
202 | INIT_TP_WR(cpl6, 0); | |
203 | qid_atid = TID_QID_V(tx_info->rx_qid) | | |
204 | TID_TID_V(atid); | |
205 | OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, qid_atid)); | |
206 | cpl->local_port = inet->inet_sport; | |
207 | cpl->peer_port = inet->inet_dport; | |
208 | cpl->local_ip = inet->inet_rcv_saddr; | |
209 | cpl->peer_ip = inet->inet_daddr; | |
210 | ||
211 | /* fill first 64 bit option field. */ | |
212 | options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F | | |
213 | SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan); | |
214 | cpl->opt0 = cpu_to_be64(options); | |
215 | ||
216 | /* next 64 bit option field. */ | |
217 | options = | |
218 | TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]); | |
219 | cpl->opt2 = htonl(options); | |
220 | ||
221 | return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te); | |
222 | } | |
223 | ||
76d7728d | 224 | #if IS_ENABLED(CONFIG_IPV6) |
62370a4f RM |
225 | /* |
226 | * chcr_ktls_act_open_req6: creates TCB entry for ipv6 connection. | |
227 | * @sk - tcp socket. | |
228 | * @tx_info - driver specific tls info. | |
229 | * @atid - connection active tid. | |
230 | * return - send success/failure. | |
231 | */ | |
232 | static int chcr_ktls_act_open_req6(struct sock *sk, | |
233 | struct chcr_ktls_info *tx_info, | |
234 | int atid) | |
235 | { | |
236 | struct inet_sock *inet = inet_sk(sk); | |
237 | struct cpl_t6_act_open_req6 *cpl6; | |
238 | struct cpl_act_open_req6 *cpl; | |
239 | struct sk_buff *skb; | |
240 | unsigned int len; | |
241 | int qid_atid; | |
242 | u64 options; | |
243 | ||
244 | len = sizeof(*cpl6); | |
245 | skb = alloc_skb(len, GFP_KERNEL); | |
246 | if (unlikely(!skb)) | |
247 | return -ENOMEM; | |
248 | /* mark it a control pkt */ | |
249 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); | |
250 | ||
251 | cpl6 = __skb_put_zero(skb, len); | |
252 | cpl = (struct cpl_act_open_req6 *)cpl6; | |
253 | INIT_TP_WR(cpl6, 0); | |
254 | qid_atid = TID_QID_V(tx_info->rx_qid) | TID_TID_V(atid); | |
255 | OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid)); | |
256 | cpl->local_port = inet->inet_sport; | |
257 | cpl->peer_port = inet->inet_dport; | |
258 | cpl->local_ip_hi = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[0]; | |
259 | cpl->local_ip_lo = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[8]; | |
260 | cpl->peer_ip_hi = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[0]; | |
261 | cpl->peer_ip_lo = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[8]; | |
262 | ||
263 | /* first 64 bit option field. */ | |
264 | options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F | | |
265 | SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan); | |
266 | cpl->opt0 = cpu_to_be64(options); | |
267 | /* next 64 bit option field. */ | |
268 | options = | |
269 | TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]); | |
270 | cpl->opt2 = htonl(options); | |
271 | ||
272 | return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te); | |
273 | } | |
76d7728d | 274 | #endif /* #if IS_ENABLED(CONFIG_IPV6) */ |
62370a4f | 275 | |
34aba2c4 RM |
276 | /* |
277 | * chcr_setup_connection: create a TCB entry so that TP will form tcp packets. | |
278 | * @sk - tcp socket. | |
279 | * @tx_info - driver specific tls info. | |
280 | * return: NET_TX_OK/NET_XMIT_DROP | |
281 | */ | |
282 | static int chcr_setup_connection(struct sock *sk, | |
283 | struct chcr_ktls_info *tx_info) | |
284 | { | |
285 | struct tid_info *t = &tx_info->adap->tids; | |
286 | int atid, ret = 0; | |
287 | ||
288 | atid = cxgb4_alloc_atid(t, tx_info); | |
289 | if (atid == -1) | |
290 | return -EINVAL; | |
291 | ||
292 | tx_info->atid = atid; | |
293 | tx_info->ip_family = sk->sk_family; | |
294 | ||
76d7728d | 295 | if (sk->sk_family == AF_INET) { |
34aba2c4 RM |
296 | tx_info->ip_family = AF_INET; |
297 | ret = chcr_ktls_act_open_req(sk, tx_info, atid); | |
76d7728d | 298 | #if IS_ENABLED(CONFIG_IPV6) |
34aba2c4 | 299 | } else { |
76d7728d RM |
300 | if (!sk->sk_ipv6only && |
301 | ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) { | |
302 | tx_info->ip_family = AF_INET; | |
303 | ret = chcr_ktls_act_open_req(sk, tx_info, atid); | |
304 | } else { | |
305 | tx_info->ip_family = AF_INET6; | |
306 | ret = cxgb4_clip_get(tx_info->netdev, | |
307 | (const u32 *) | |
308 | &sk->sk_v6_rcv_saddr.s6_addr, | |
309 | 1); | |
310 | if (ret) | |
311 | goto out; | |
312 | ret = chcr_ktls_act_open_req6(sk, tx_info, atid); | |
313 | } | |
314 | #endif | |
34aba2c4 RM |
315 | } |
316 | ||
317 | /* if return type is NET_XMIT_CN, msg will be sent but delayed, mark ret | |
318 | * success, if any other return type clear atid and return that failure. | |
319 | */ | |
320 | if (ret) { | |
321 | if (ret == NET_XMIT_CN) | |
322 | ret = 0; | |
323 | else | |
324 | cxgb4_free_atid(t, atid); | |
8a30923e | 325 | goto out; |
34aba2c4 RM |
326 | } |
327 | ||
8a30923e RM |
328 | /* update the connection state */ |
329 | chcr_ktls_update_connection_state(tx_info, KTLS_CONN_ACT_OPEN_REQ); | |
330 | out: | |
34aba2c4 RM |
331 | return ret; |
332 | } | |
333 | ||
334 | /* | |
335 | * chcr_set_tcb_field: update tcb fields. | |
336 | * @tx_info - driver specific tls info. | |
337 | * @word - TCB word. | |
338 | * @mask - TCB word related mask. | |
339 | * @val - TCB word related value. | |
340 | * @no_reply - set 1 if not looking for TP response. | |
341 | */ | |
342 | static int chcr_set_tcb_field(struct chcr_ktls_info *tx_info, u16 word, | |
343 | u64 mask, u64 val, int no_reply) | |
344 | { | |
345 | struct cpl_set_tcb_field *req; | |
346 | struct sk_buff *skb; | |
347 | ||
348 | skb = alloc_skb(sizeof(struct cpl_set_tcb_field), GFP_ATOMIC); | |
349 | if (!skb) | |
350 | return -ENOMEM; | |
351 | ||
352 | req = (struct cpl_set_tcb_field *)__skb_put_zero(skb, sizeof(*req)); | |
353 | INIT_TP_WR_CPL(req, CPL_SET_TCB_FIELD, tx_info->tid); | |
354 | req->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) | | |
355 | NO_REPLY_V(no_reply)); | |
356 | req->word_cookie = htons(TCB_WORD_V(word)); | |
357 | req->mask = cpu_to_be64(mask); | |
358 | req->val = cpu_to_be64(val); | |
359 | ||
360 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); | |
361 | return cxgb4_ofld_send(tx_info->netdev, skb); | |
362 | } | |
363 | ||
364 | /* | |
365 | * chcr_ktls_mark_tcb_close: mark tcb state to CLOSE | |
366 | * @tx_info - driver specific tls info. | |
367 | * return: NET_TX_OK/NET_XMIT_DROP. | |
368 | */ | |
369 | static int chcr_ktls_mark_tcb_close(struct chcr_ktls_info *tx_info) | |
370 | { | |
371 | return chcr_set_tcb_field(tx_info, TCB_T_STATE_W, | |
372 | TCB_T_STATE_V(TCB_T_STATE_M), | |
373 | CHCR_TCB_STATE_CLOSED, 1); | |
374 | } | |
375 | ||
376 | /* | |
377 | * chcr_ktls_dev_del: call back for tls_dev_del. | |
378 | * Remove the tid and l2t entry and close the connection. | |
379 | * it per connection basis. | |
380 | * @netdev - net device. | |
381 | * @tls_cts - tls context. | |
382 | * @direction - TX/RX crypto direction | |
383 | */ | |
a3ac249a RM |
384 | void chcr_ktls_dev_del(struct net_device *netdev, |
385 | struct tls_context *tls_ctx, | |
386 | enum tls_offload_ctx_dir direction) | |
34aba2c4 RM |
387 | { |
388 | struct chcr_ktls_ofld_ctx_tx *tx_ctx = | |
389 | chcr_get_ktls_tx_context(tls_ctx); | |
390 | struct chcr_ktls_info *tx_info = tx_ctx->chcr_info; | |
62370a4f | 391 | struct sock *sk; |
34aba2c4 RM |
392 | |
393 | if (!tx_info) | |
394 | return; | |
62370a4f | 395 | sk = tx_info->sk; |
34aba2c4 RM |
396 | |
397 | spin_lock(&tx_info->lock); | |
398 | tx_info->connection_state = KTLS_CONN_CLOSED; | |
399 | spin_unlock(&tx_info->lock); | |
400 | ||
62370a4f | 401 | /* clear l2t entry */ |
34aba2c4 RM |
402 | if (tx_info->l2te) |
403 | cxgb4_l2t_release(tx_info->l2te); | |
404 | ||
76d7728d | 405 | #if IS_ENABLED(CONFIG_IPV6) |
62370a4f RM |
406 | /* clear clip entry */ |
407 | if (tx_info->ip_family == AF_INET6) | |
408 | cxgb4_clip_release(netdev, | |
409 | (const u32 *)&sk->sk_v6_daddr.in6_u.u6_addr8, | |
410 | 1); | |
76d7728d | 411 | #endif |
62370a4f RM |
412 | |
413 | /* clear tid */ | |
34aba2c4 RM |
414 | if (tx_info->tid != -1) { |
415 | /* clear tcb state and then release tid */ | |
416 | chcr_ktls_mark_tcb_close(tx_info); | |
417 | cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, | |
418 | tx_info->tid, tx_info->ip_family); | |
419 | } | |
62370a4f RM |
420 | |
421 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_connection_close); | |
34aba2c4 RM |
422 | kvfree(tx_info); |
423 | tx_ctx->chcr_info = NULL; | |
a3ac249a RM |
424 | /* release module refcount */ |
425 | module_put(THIS_MODULE); | |
34aba2c4 RM |
426 | } |
427 | ||
428 | /* | |
429 | * chcr_ktls_dev_add: call back for tls_dev_add. | |
430 | * Create a tcb entry for TP. Also add l2t entry for the connection. And | |
431 | * generate keys & save those keys locally. | |
432 | * @netdev - net device. | |
433 | * @tls_cts - tls context. | |
434 | * @direction - TX/RX crypto direction | |
435 | * return: SUCCESS/FAILURE. | |
436 | */ | |
a3ac249a RM |
437 | int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk, |
438 | enum tls_offload_ctx_dir direction, | |
439 | struct tls_crypto_info *crypto_info, | |
440 | u32 start_offload_tcp_sn) | |
34aba2c4 RM |
441 | { |
442 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
443 | struct chcr_ktls_ofld_ctx_tx *tx_ctx; | |
444 | struct chcr_ktls_info *tx_info; | |
445 | struct dst_entry *dst; | |
446 | struct adapter *adap; | |
447 | struct port_info *pi; | |
448 | struct neighbour *n; | |
449 | u8 daaddr[16]; | |
450 | int ret = -1; | |
451 | ||
452 | tx_ctx = chcr_get_ktls_tx_context(tls_ctx); | |
453 | ||
454 | pi = netdev_priv(netdev); | |
455 | adap = pi->adapter; | |
456 | if (direction == TLS_OFFLOAD_CTX_DIR_RX) { | |
457 | pr_err("not expecting for RX direction\n"); | |
458 | ret = -EINVAL; | |
459 | goto out; | |
460 | } | |
461 | if (tx_ctx->chcr_info) { | |
462 | ret = -EINVAL; | |
463 | goto out; | |
464 | } | |
465 | ||
466 | tx_info = kvzalloc(sizeof(*tx_info), GFP_KERNEL); | |
467 | if (!tx_info) { | |
468 | ret = -ENOMEM; | |
469 | goto out; | |
470 | } | |
471 | ||
472 | spin_lock_init(&tx_info->lock); | |
473 | ||
474 | /* clear connection state */ | |
475 | spin_lock(&tx_info->lock); | |
476 | tx_info->connection_state = KTLS_CONN_CLOSED; | |
477 | spin_unlock(&tx_info->lock); | |
478 | ||
479 | tx_info->sk = sk; | |
480 | /* initialize tid and atid to -1, 0 is a also a valid id. */ | |
481 | tx_info->tid = -1; | |
482 | tx_info->atid = -1; | |
483 | ||
484 | tx_info->adap = adap; | |
485 | tx_info->netdev = netdev; | |
5a4b9fe7 | 486 | tx_info->first_qset = pi->first_qset; |
34aba2c4 RM |
487 | tx_info->tx_chan = pi->tx_chan; |
488 | tx_info->smt_idx = pi->smt_idx; | |
489 | tx_info->port_id = pi->port_id; | |
490 | ||
491 | tx_info->rx_qid = chcr_get_first_rx_qid(adap); | |
492 | if (unlikely(tx_info->rx_qid < 0)) | |
493 | goto out2; | |
494 | ||
495 | tx_info->prev_seq = start_offload_tcp_sn; | |
496 | tx_info->tcp_start_seq_number = start_offload_tcp_sn; | |
497 | ||
8a30923e RM |
498 | /* save crypto keys */ |
499 | ret = chcr_ktls_save_keys(tx_info, crypto_info, direction); | |
500 | if (ret < 0) | |
501 | goto out2; | |
502 | ||
34aba2c4 | 503 | /* get peer ip */ |
76d7728d | 504 | if (sk->sk_family == AF_INET) { |
34aba2c4 | 505 | memcpy(daaddr, &sk->sk_daddr, 4); |
76d7728d | 506 | #if IS_ENABLED(CONFIG_IPV6) |
34aba2c4 | 507 | } else { |
76d7728d RM |
508 | if (!sk->sk_ipv6only && |
509 | ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) | |
510 | memcpy(daaddr, &sk->sk_daddr, 4); | |
511 | else | |
512 | memcpy(daaddr, sk->sk_v6_daddr.in6_u.u6_addr8, 16); | |
513 | #endif | |
34aba2c4 RM |
514 | } |
515 | ||
516 | /* get the l2t index */ | |
517 | dst = sk_dst_get(sk); | |
518 | if (!dst) { | |
519 | pr_err("DST entry not found\n"); | |
520 | goto out2; | |
521 | } | |
522 | n = dst_neigh_lookup(dst, daaddr); | |
523 | if (!n || !n->dev) { | |
524 | pr_err("neighbour not found\n"); | |
525 | dst_release(dst); | |
526 | goto out2; | |
527 | } | |
528 | tx_info->l2te = cxgb4_l2t_get(adap->l2t, n, n->dev, 0); | |
529 | ||
530 | neigh_release(n); | |
531 | dst_release(dst); | |
532 | ||
533 | if (!tx_info->l2te) { | |
534 | pr_err("l2t entry not found\n"); | |
535 | goto out2; | |
536 | } | |
537 | ||
538 | tx_ctx->chcr_info = tx_info; | |
539 | ||
540 | /* create a filter and call cxgb4_l2t_send to send the packet out, which | |
541 | * will take care of updating l2t entry in hw if not already done. | |
542 | */ | |
543 | ret = chcr_setup_connection(sk, tx_info); | |
544 | if (ret) | |
545 | goto out2; | |
546 | ||
a3ac249a RM |
547 | /* Driver shouldn't be removed until any single connection exists */ |
548 | if (!try_module_get(THIS_MODULE)) { | |
549 | ret = -EINVAL; | |
550 | goto out2; | |
551 | } | |
552 | ||
62370a4f | 553 | atomic64_inc(&adap->chcr_stats.ktls_tx_connection_open); |
34aba2c4 RM |
554 | return 0; |
555 | out2: | |
556 | kvfree(tx_info); | |
557 | out: | |
62370a4f | 558 | atomic64_inc(&adap->chcr_stats.ktls_tx_connection_fail); |
34aba2c4 RM |
559 | return ret; |
560 | } | |
561 | ||
8a30923e RM |
562 | /* |
563 | * chcr_init_tcb_fields: Initialize tcb fields to handle TCP seq number | |
564 | * handling. | |
565 | * @tx_info - driver specific tls info. | |
566 | * return: NET_TX_OK/NET_XMIT_DROP | |
567 | */ | |
568 | static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info) | |
569 | { | |
570 | int ret = 0; | |
571 | ||
572 | /* set tcb in offload and bypass */ | |
573 | ret = | |
574 | chcr_set_tcb_field(tx_info, TCB_T_FLAGS_W, | |
575 | TCB_T_FLAGS_V(TF_CORE_BYPASS_F | TF_NON_OFFLOAD_F), | |
576 | TCB_T_FLAGS_V(TF_CORE_BYPASS_F), 1); | |
577 | if (ret) | |
578 | return ret; | |
579 | /* reset snd_una and snd_next fields in tcb */ | |
580 | ret = chcr_set_tcb_field(tx_info, TCB_SND_UNA_RAW_W, | |
581 | TCB_SND_NXT_RAW_V(TCB_SND_NXT_RAW_M) | | |
582 | TCB_SND_UNA_RAW_V(TCB_SND_UNA_RAW_M), | |
583 | 0, 1); | |
584 | if (ret) | |
585 | return ret; | |
586 | ||
587 | /* reset send max */ | |
588 | ret = chcr_set_tcb_field(tx_info, TCB_SND_MAX_RAW_W, | |
589 | TCB_SND_MAX_RAW_V(TCB_SND_MAX_RAW_M), | |
590 | 0, 1); | |
591 | if (ret) | |
592 | return ret; | |
593 | ||
594 | /* update l2t index and request for tp reply to confirm tcb is | |
595 | * initialised to handle tx traffic. | |
596 | */ | |
597 | ret = chcr_set_tcb_field(tx_info, TCB_L2T_IX_W, | |
598 | TCB_L2T_IX_V(TCB_L2T_IX_M), | |
599 | TCB_L2T_IX_V(tx_info->l2te->idx), 0); | |
600 | return ret; | |
601 | } | |
602 | ||
603 | /* | |
604 | * chcr_ktls_cpl_act_open_rpl: connection reply received from TP. | |
605 | */ | |
606 | int chcr_ktls_cpl_act_open_rpl(struct adapter *adap, unsigned char *input) | |
607 | { | |
608 | const struct cpl_act_open_rpl *p = (void *)input; | |
609 | struct chcr_ktls_info *tx_info = NULL; | |
610 | unsigned int atid, tid, status; | |
611 | struct tid_info *t; | |
612 | ||
613 | tid = GET_TID(p); | |
614 | status = AOPEN_STATUS_G(ntohl(p->atid_status)); | |
615 | atid = TID_TID_G(AOPEN_ATID_G(ntohl(p->atid_status))); | |
616 | ||
617 | t = &adap->tids; | |
618 | tx_info = lookup_atid(t, atid); | |
619 | ||
620 | if (!tx_info || tx_info->atid != atid) { | |
621 | pr_err("tx_info or atid is not correct\n"); | |
622 | return -1; | |
623 | } | |
624 | ||
625 | if (!status) { | |
626 | tx_info->tid = tid; | |
627 | cxgb4_insert_tid(t, tx_info, tx_info->tid, tx_info->ip_family); | |
628 | ||
629 | cxgb4_free_atid(t, atid); | |
630 | tx_info->atid = -1; | |
631 | /* update the connection state */ | |
632 | chcr_ktls_update_connection_state(tx_info, | |
633 | KTLS_CONN_ACT_OPEN_RPL); | |
634 | } | |
635 | return 0; | |
636 | } | |
637 | ||
638 | /* | |
639 | * chcr_ktls_cpl_set_tcb_rpl: TCB reply received from TP. | |
640 | */ | |
641 | int chcr_ktls_cpl_set_tcb_rpl(struct adapter *adap, unsigned char *input) | |
642 | { | |
643 | const struct cpl_set_tcb_rpl *p = (void *)input; | |
644 | struct chcr_ktls_info *tx_info = NULL; | |
645 | struct tid_info *t; | |
a1dd3875 | 646 | u32 tid; |
8a30923e RM |
647 | |
648 | tid = GET_TID(p); | |
8a30923e RM |
649 | |
650 | t = &adap->tids; | |
651 | tx_info = lookup_tid(t, tid); | |
652 | if (!tx_info || tx_info->tid != tid) { | |
653 | pr_err("tx_info or atid is not correct\n"); | |
654 | return -1; | |
655 | } | |
656 | /* update the connection state */ | |
657 | chcr_ktls_update_connection_state(tx_info, KTLS_CONN_SET_TCB_RPL); | |
658 | return 0; | |
659 | } | |
5a4b9fe7 | 660 | |
071a43e6 AB |
661 | static void *__chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info, |
662 | u32 tid, void *pos, u16 word, u64 mask, | |
5a4b9fe7 RM |
663 | u64 val, u32 reply) |
664 | { | |
665 | struct cpl_set_tcb_field_core *cpl; | |
666 | struct ulptx_idata *idata; | |
667 | struct ulp_txpkt *txpkt; | |
5a4b9fe7 | 668 | |
5a4b9fe7 RM |
669 | /* ULP_TXPKT */ |
670 | txpkt = pos; | |
671 | txpkt->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | ULP_TXPKT_DEST_V(0)); | |
672 | txpkt->len = htonl(DIV_ROUND_UP(CHCR_SET_TCB_FIELD_LEN, 16)); | |
673 | ||
674 | /* ULPTX_IDATA sub-command */ | |
675 | idata = (struct ulptx_idata *)(txpkt + 1); | |
676 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); | |
677 | idata->len = htonl(sizeof(*cpl)); | |
678 | pos = idata + 1; | |
679 | ||
680 | cpl = pos; | |
681 | /* CPL_SET_TCB_FIELD */ | |
682 | OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
683 | cpl->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) | | |
684 | NO_REPLY_V(!reply)); | |
685 | cpl->word_cookie = htons(TCB_WORD_V(word)); | |
686 | cpl->mask = cpu_to_be64(mask); | |
687 | cpl->val = cpu_to_be64(val); | |
688 | ||
689 | /* ULPTX_NOOP */ | |
690 | idata = (struct ulptx_idata *)(cpl + 1); | |
691 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_NOOP)); | |
692 | idata->len = htonl(0); | |
071a43e6 | 693 | pos = idata + 1; |
5a4b9fe7 | 694 | |
071a43e6 AB |
695 | return pos; |
696 | } | |
697 | ||
698 | ||
699 | /* | |
700 | * chcr_write_cpl_set_tcb_ulp: update tcb values. | |
701 | * TCB is responsible to create tcp headers, so all the related values | |
702 | * should be correctly updated. | |
703 | * @tx_info - driver specific tls info. | |
704 | * @q - tx queue on which packet is going out. | |
705 | * @tid - TCB identifier. | |
706 | * @pos - current index where should we start writing. | |
707 | * @word - TCB word. | |
708 | * @mask - TCB word related mask. | |
709 | * @val - TCB word related value. | |
710 | * @reply - set 1 if looking for TP response. | |
711 | * return - next position to write. | |
712 | */ | |
713 | static void *chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info, | |
714 | struct sge_eth_txq *q, u32 tid, | |
715 | void *pos, u16 word, u64 mask, | |
716 | u64 val, u32 reply) | |
717 | { | |
718 | int left = (void *)q->q.stat - pos; | |
719 | ||
720 | if (unlikely(left < CHCR_SET_TCB_FIELD_LEN)) { | |
721 | if (!left) { | |
5a4b9fe7 | 722 | pos = q->q.desc; |
071a43e6 AB |
723 | } else { |
724 | u8 buf[48] = {0}; | |
725 | ||
726 | __chcr_write_cpl_set_tcb_ulp(tx_info, tid, buf, word, | |
727 | mask, val, reply); | |
728 | ||
729 | return chcr_copy_to_txd(buf, &q->q, pos, | |
730 | CHCR_SET_TCB_FIELD_LEN); | |
731 | } | |
5a4b9fe7 RM |
732 | } |
733 | ||
071a43e6 AB |
734 | pos = __chcr_write_cpl_set_tcb_ulp(tx_info, tid, pos, word, |
735 | mask, val, reply); | |
736 | ||
737 | /* check again if we are at the end of the queue */ | |
738 | if (left == CHCR_SET_TCB_FIELD_LEN) | |
739 | pos = q->q.desc; | |
740 | ||
5a4b9fe7 RM |
741 | return pos; |
742 | } | |
743 | ||
744 | /* | |
745 | * chcr_ktls_xmit_tcb_cpls: update tcb entry so that TP will create the header | |
746 | * with updated values like tcp seq, ack, window etc. | |
747 | * @tx_info - driver specific tls info. | |
748 | * @q - TX queue. | |
749 | * @tcp_seq | |
750 | * @tcp_ack | |
751 | * @tcp_win | |
752 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
753 | */ | |
754 | static int chcr_ktls_xmit_tcb_cpls(struct chcr_ktls_info *tx_info, | |
755 | struct sge_eth_txq *q, u64 tcp_seq, | |
756 | u64 tcp_ack, u64 tcp_win) | |
757 | { | |
758 | bool first_wr = ((tx_info->prev_ack == 0) && (tx_info->prev_win == 0)); | |
759 | u32 len, cpl = 0, ndesc, wr_len; | |
760 | struct fw_ulptx_wr *wr; | |
761 | int credits; | |
762 | void *pos; | |
763 | ||
764 | wr_len = sizeof(*wr); | |
765 | /* there can be max 4 cpls, check if we have enough credits */ | |
766 | len = wr_len + 4 * roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
767 | ndesc = DIV_ROUND_UP(len, 64); | |
768 | ||
769 | credits = chcr_txq_avail(&q->q) - ndesc; | |
770 | if (unlikely(credits < 0)) { | |
771 | chcr_eth_txq_stop(q); | |
772 | return NETDEV_TX_BUSY; | |
773 | } | |
774 | ||
775 | pos = &q->q.desc[q->q.pidx]; | |
776 | /* make space for WR, we'll fill it later when we know all the cpls | |
777 | * being sent out and have complete length. | |
778 | */ | |
779 | wr = pos; | |
780 | pos += wr_len; | |
781 | /* update tx_max if its a re-transmit or the first wr */ | |
782 | if (first_wr || tcp_seq != tx_info->prev_seq) { | |
783 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
784 | TCB_TX_MAX_W, | |
785 | TCB_TX_MAX_V(TCB_TX_MAX_M), | |
786 | TCB_TX_MAX_V(tcp_seq), 0); | |
787 | cpl++; | |
788 | } | |
789 | /* reset snd una if it's a re-transmit pkt */ | |
790 | if (tcp_seq != tx_info->prev_seq) { | |
791 | /* reset snd_una */ | |
792 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
793 | TCB_SND_UNA_RAW_W, | |
794 | TCB_SND_UNA_RAW_V | |
795 | (TCB_SND_UNA_RAW_M), | |
796 | TCB_SND_UNA_RAW_V(0), 0); | |
62370a4f | 797 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_ooo); |
5a4b9fe7 RM |
798 | cpl++; |
799 | } | |
800 | /* update ack */ | |
801 | if (first_wr || tx_info->prev_ack != tcp_ack) { | |
802 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
803 | TCB_RCV_NXT_W, | |
804 | TCB_RCV_NXT_V(TCB_RCV_NXT_M), | |
805 | TCB_RCV_NXT_V(tcp_ack), 0); | |
806 | tx_info->prev_ack = tcp_ack; | |
807 | cpl++; | |
808 | } | |
809 | /* update receive window */ | |
810 | if (first_wr || tx_info->prev_win != tcp_win) { | |
811 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
812 | TCB_RCV_WND_W, | |
813 | TCB_RCV_WND_V(TCB_RCV_WND_M), | |
814 | TCB_RCV_WND_V(tcp_win), 0); | |
815 | tx_info->prev_win = tcp_win; | |
816 | cpl++; | |
817 | } | |
818 | ||
819 | if (cpl) { | |
820 | /* get the actual length */ | |
821 | len = wr_len + cpl * roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
822 | /* ULPTX wr */ | |
823 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
824 | wr->cookie = 0; | |
825 | /* fill len in wr field */ | |
826 | wr->flowid_len16 = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(len, 16))); | |
827 | ||
828 | ndesc = DIV_ROUND_UP(len, 64); | |
829 | chcr_txq_advance(&q->q, ndesc); | |
830 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
831 | } | |
832 | return 0; | |
833 | } | |
834 | ||
835 | /* | |
836 | * chcr_ktls_skb_copy | |
837 | * @nskb - new skb where the frags to be added. | |
838 | * @skb - old skb from which frags will be copied. | |
839 | */ | |
840 | static void chcr_ktls_skb_copy(struct sk_buff *skb, struct sk_buff *nskb) | |
841 | { | |
842 | int i; | |
843 | ||
844 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
845 | skb_shinfo(nskb)->frags[i] = skb_shinfo(skb)->frags[i]; | |
846 | __skb_frag_ref(&skb_shinfo(nskb)->frags[i]); | |
847 | } | |
848 | ||
849 | skb_shinfo(nskb)->nr_frags = skb_shinfo(skb)->nr_frags; | |
850 | nskb->len += skb->data_len; | |
851 | nskb->data_len = skb->data_len; | |
852 | nskb->truesize += skb->data_len; | |
853 | } | |
854 | ||
855 | /* | |
856 | * chcr_ktls_get_tx_flits | |
857 | * returns number of flits to be sent out, it includes key context length, WR | |
858 | * size and skb fragments. | |
859 | */ | |
860 | static unsigned int | |
861 | chcr_ktls_get_tx_flits(const struct sk_buff *skb, unsigned int key_ctx_len) | |
862 | { | |
863 | return chcr_sgl_len(skb_shinfo(skb)->nr_frags) + | |
864 | DIV_ROUND_UP(key_ctx_len + CHCR_KTLS_WR_SIZE, 8); | |
865 | } | |
866 | ||
429765a1 RM |
867 | /* |
868 | * chcr_ktls_check_tcp_options: To check if there is any TCP option availbale | |
869 | * other than timestamp. | |
870 | * @skb - skb contains partial record.. | |
871 | * return: 1 / 0 | |
872 | */ | |
873 | static int | |
874 | chcr_ktls_check_tcp_options(struct tcphdr *tcp) | |
875 | { | |
876 | int cnt, opt, optlen; | |
877 | u_char *cp; | |
878 | ||
879 | cp = (u_char *)(tcp + 1); | |
880 | cnt = (tcp->doff << 2) - sizeof(struct tcphdr); | |
881 | for (; cnt > 0; cnt -= optlen, cp += optlen) { | |
882 | opt = cp[0]; | |
883 | if (opt == TCPOPT_EOL) | |
884 | break; | |
885 | if (opt == TCPOPT_NOP) { | |
886 | optlen = 1; | |
887 | } else { | |
888 | if (cnt < 2) | |
889 | break; | |
890 | optlen = cp[1]; | |
891 | if (optlen < 2 || optlen > cnt) | |
892 | break; | |
893 | } | |
894 | switch (opt) { | |
895 | case TCPOPT_NOP: | |
896 | break; | |
897 | default: | |
898 | return 1; | |
899 | } | |
900 | } | |
901 | return 0; | |
902 | } | |
903 | ||
904 | /* | |
905 | * chcr_ktls_write_tcp_options : TP can't send out all the options, we need to | |
906 | * send out separately. | |
907 | * @tx_info - driver specific tls info. | |
908 | * @skb - skb contains partial record.. | |
909 | * @q - TX queue. | |
910 | * @tx_chan - channel number. | |
911 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
912 | */ | |
913 | static int | |
914 | chcr_ktls_write_tcp_options(struct chcr_ktls_info *tx_info, struct sk_buff *skb, | |
915 | struct sge_eth_txq *q, uint32_t tx_chan) | |
916 | { | |
917 | struct fw_eth_tx_pkt_wr *wr; | |
918 | struct cpl_tx_pkt_core *cpl; | |
919 | u32 ctrl, iplen, maclen; | |
76d7728d | 920 | #if IS_ENABLED(CONFIG_IPV6) |
429765a1 | 921 | struct ipv6hdr *ip6; |
76d7728d | 922 | #endif |
429765a1 RM |
923 | unsigned int ndesc; |
924 | struct tcphdr *tcp; | |
925 | int len16, pktlen; | |
926 | struct iphdr *ip; | |
927 | int credits; | |
928 | u8 buf[150]; | |
929 | void *pos; | |
930 | ||
931 | iplen = skb_network_header_len(skb); | |
932 | maclen = skb_mac_header_len(skb); | |
933 | ||
934 | /* packet length = eth hdr len + ip hdr len + tcp hdr len | |
935 | * (including options). | |
936 | */ | |
937 | pktlen = skb->len - skb->data_len; | |
938 | ||
939 | ctrl = sizeof(*cpl) + pktlen; | |
940 | len16 = DIV_ROUND_UP(sizeof(*wr) + ctrl, 16); | |
941 | /* check how many descriptors needed */ | |
942 | ndesc = DIV_ROUND_UP(len16, 4); | |
943 | ||
944 | credits = chcr_txq_avail(&q->q) - ndesc; | |
945 | if (unlikely(credits < 0)) { | |
946 | chcr_eth_txq_stop(q); | |
947 | return NETDEV_TX_BUSY; | |
948 | } | |
949 | ||
950 | pos = &q->q.desc[q->q.pidx]; | |
951 | wr = pos; | |
952 | ||
953 | /* Firmware work request header */ | |
954 | wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) | | |
955 | FW_WR_IMMDLEN_V(ctrl)); | |
956 | ||
957 | wr->equiq_to_len16 = htonl(FW_WR_LEN16_V(len16)); | |
958 | wr->r3 = 0; | |
959 | ||
960 | cpl = (void *)(wr + 1); | |
961 | ||
962 | /* CPL header */ | |
963 | cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) | TXPKT_INTF_V(tx_chan) | | |
964 | TXPKT_PF_V(tx_info->adap->pf)); | |
965 | cpl->pack = 0; | |
966 | cpl->len = htons(pktlen); | |
967 | /* checksum offload */ | |
968 | cpl->ctrl1 = 0; | |
969 | ||
970 | pos = cpl + 1; | |
971 | ||
972 | memcpy(buf, skb->data, pktlen); | |
973 | if (tx_info->ip_family == AF_INET) { | |
974 | /* we need to correct ip header len */ | |
975 | ip = (struct iphdr *)(buf + maclen); | |
976 | ip->tot_len = htons(pktlen - maclen); | |
76d7728d | 977 | #if IS_ENABLED(CONFIG_IPV6) |
429765a1 RM |
978 | } else { |
979 | ip6 = (struct ipv6hdr *)(buf + maclen); | |
e14394e6 | 980 | ip6->payload_len = htons(pktlen - maclen - iplen); |
76d7728d | 981 | #endif |
429765a1 RM |
982 | } |
983 | /* now take care of the tcp header, if fin is not set then clear push | |
984 | * bit as well, and if fin is set, it will be sent at the last so we | |
985 | * need to update the tcp sequence number as per the last packet. | |
986 | */ | |
987 | tcp = (struct tcphdr *)(buf + maclen + iplen); | |
988 | ||
989 | if (!tcp->fin) | |
990 | tcp->psh = 0; | |
991 | else | |
992 | tcp->seq = htonl(tx_info->prev_seq); | |
993 | ||
994 | chcr_copy_to_txd(buf, &q->q, pos, pktlen); | |
995 | ||
996 | chcr_txq_advance(&q->q, ndesc); | |
997 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | /* chcr_ktls_skb_shift - Shifts request length paged data from skb to another. | |
1002 | * @tgt- buffer into which tail data gets added | |
1003 | * @skb- buffer from which the paged data comes from | |
1004 | * @shiftlen- shift up to this many bytes | |
1005 | */ | |
1006 | static int chcr_ktls_skb_shift(struct sk_buff *tgt, struct sk_buff *skb, | |
1007 | int shiftlen) | |
1008 | { | |
1009 | skb_frag_t *fragfrom, *fragto; | |
1010 | int from, to, todo; | |
1011 | ||
1012 | WARN_ON(shiftlen > skb->data_len); | |
1013 | ||
1014 | todo = shiftlen; | |
1015 | from = 0; | |
1016 | to = 0; | |
1017 | fragfrom = &skb_shinfo(skb)->frags[from]; | |
1018 | ||
1019 | while ((todo > 0) && (from < skb_shinfo(skb)->nr_frags)) { | |
1020 | fragfrom = &skb_shinfo(skb)->frags[from]; | |
1021 | fragto = &skb_shinfo(tgt)->frags[to]; | |
1022 | ||
1023 | if (todo >= skb_frag_size(fragfrom)) { | |
1024 | *fragto = *fragfrom; | |
1025 | todo -= skb_frag_size(fragfrom); | |
1026 | from++; | |
1027 | to++; | |
1028 | ||
1029 | } else { | |
1030 | __skb_frag_ref(fragfrom); | |
1031 | skb_frag_page_copy(fragto, fragfrom); | |
1032 | skb_frag_off_copy(fragto, fragfrom); | |
1033 | skb_frag_size_set(fragto, todo); | |
1034 | ||
1035 | skb_frag_off_add(fragfrom, todo); | |
1036 | skb_frag_size_sub(fragfrom, todo); | |
1037 | todo = 0; | |
1038 | ||
1039 | to++; | |
1040 | break; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | /* Ready to "commit" this state change to tgt */ | |
1045 | skb_shinfo(tgt)->nr_frags = to; | |
1046 | ||
1047 | /* Reposition in the original skb */ | |
1048 | to = 0; | |
1049 | while (from < skb_shinfo(skb)->nr_frags) | |
1050 | skb_shinfo(skb)->frags[to++] = skb_shinfo(skb)->frags[from++]; | |
1051 | ||
1052 | skb_shinfo(skb)->nr_frags = to; | |
1053 | ||
1054 | WARN_ON(todo > 0 && !skb_shinfo(skb)->nr_frags); | |
1055 | ||
1056 | skb->len -= shiftlen; | |
1057 | skb->data_len -= shiftlen; | |
1058 | skb->truesize -= shiftlen; | |
1059 | tgt->len += shiftlen; | |
1060 | tgt->data_len += shiftlen; | |
1061 | tgt->truesize += shiftlen; | |
1062 | ||
1063 | return shiftlen; | |
1064 | } | |
1065 | ||
5a4b9fe7 RM |
1066 | /* |
1067 | * chcr_ktls_xmit_wr_complete: This sends out the complete record. If an skb | |
1068 | * received has partial end part of the record, send out the complete record, so | |
1069 | * that crypto block will be able to generate TAG/HASH. | |
1070 | * @skb - segment which has complete or partial end part. | |
1071 | * @tx_info - driver specific tls info. | |
1072 | * @q - TX queue. | |
1073 | * @tcp_seq | |
1074 | * @tcp_push - tcp push bit. | |
1075 | * @mss - segment size. | |
1076 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1077 | */ | |
1078 | static int chcr_ktls_xmit_wr_complete(struct sk_buff *skb, | |
1079 | struct chcr_ktls_info *tx_info, | |
1080 | struct sge_eth_txq *q, u32 tcp_seq, | |
1081 | bool tcp_push, u32 mss) | |
1082 | { | |
1083 | u32 len16, wr_mid = 0, flits = 0, ndesc, cipher_start; | |
1084 | struct adapter *adap = tx_info->adap; | |
1085 | int credits, left, last_desc; | |
1086 | struct tx_sw_desc *sgl_sdesc; | |
1087 | struct cpl_tx_data *tx_data; | |
1088 | struct cpl_tx_sec_pdu *cpl; | |
1089 | struct ulptx_idata *idata; | |
1090 | struct ulp_txpkt *ulptx; | |
1091 | struct fw_ulptx_wr *wr; | |
1092 | void *pos; | |
1093 | u64 *end; | |
1094 | ||
1095 | /* get the number of flits required */ | |
1096 | flits = chcr_ktls_get_tx_flits(skb, tx_info->key_ctx_len); | |
1097 | /* number of descriptors */ | |
1098 | ndesc = chcr_flits_to_desc(flits); | |
1099 | /* check if enough credits available */ | |
1100 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1101 | if (unlikely(credits < 0)) { | |
1102 | chcr_eth_txq_stop(q); | |
1103 | return NETDEV_TX_BUSY; | |
1104 | } | |
1105 | ||
1106 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1107 | /* Credits are below the threshold vaues, stop the queue after | |
1108 | * injecting the Work Request for this packet. | |
1109 | */ | |
1110 | chcr_eth_txq_stop(q); | |
1111 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1112 | } | |
1113 | ||
1114 | last_desc = q->q.pidx + ndesc - 1; | |
1115 | if (last_desc >= q->q.size) | |
1116 | last_desc -= q->q.size; | |
1117 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1118 | ||
1119 | if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) { | |
1120 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1121 | q->mapping_err++; | |
1122 | return NETDEV_TX_BUSY; | |
1123 | } | |
1124 | ||
1125 | pos = &q->q.desc[q->q.pidx]; | |
1126 | end = (u64 *)pos + flits; | |
1127 | /* FW_ULPTX_WR */ | |
1128 | wr = pos; | |
1129 | /* WR will need len16 */ | |
1130 | len16 = DIV_ROUND_UP(flits, 2); | |
1131 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1132 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1133 | wr->cookie = 0; | |
1134 | pos += sizeof(*wr); | |
1135 | /* ULP_TXPKT */ | |
1136 | ulptx = pos; | |
1137 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1138 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1139 | ULP_TXPKT_FID_V(q->q.cntxt_id) | | |
1140 | ULP_TXPKT_RO_F); | |
1141 | ulptx->len = htonl(len16 - 1); | |
1142 | /* ULPTX_IDATA sub-command */ | |
1143 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1144 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1145 | /* idata length will include cpl_tx_sec_pdu + key context size + | |
1146 | * cpl_tx_data header. | |
1147 | */ | |
1148 | idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len + | |
1149 | sizeof(*tx_data)); | |
1150 | /* SEC CPL */ | |
1151 | cpl = (struct cpl_tx_sec_pdu *)(idata + 1); | |
1152 | cpl->op_ivinsrtofst = | |
1153 | htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | | |
1154 | CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) | | |
1155 | CPL_TX_SEC_PDU_PLACEHOLDER_V(1) | | |
1156 | CPL_TX_SEC_PDU_IVINSRTOFST_V(TLS_HEADER_SIZE + 1)); | |
1157 | cpl->pldlen = htonl(skb->data_len); | |
1158 | ||
1159 | /* encryption should start after tls header size + iv size */ | |
1160 | cipher_start = TLS_HEADER_SIZE + tx_info->iv_size + 1; | |
1161 | ||
1162 | cpl->aadstart_cipherstop_hi = | |
1163 | htonl(CPL_TX_SEC_PDU_AADSTART_V(1) | | |
1164 | CPL_TX_SEC_PDU_AADSTOP_V(TLS_HEADER_SIZE) | | |
1165 | CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start)); | |
1166 | ||
1167 | /* authentication will also start after tls header + iv size */ | |
1168 | cpl->cipherstop_lo_authinsert = | |
1169 | htonl(CPL_TX_SEC_PDU_AUTHSTART_V(cipher_start) | | |
1170 | CPL_TX_SEC_PDU_AUTHSTOP_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE) | | |
1171 | CPL_TX_SEC_PDU_AUTHINSERT_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE)); | |
1172 | ||
1173 | /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */ | |
1174 | cpl->seqno_numivs = htonl(tx_info->scmd0_seqno_numivs); | |
1175 | cpl->ivgen_hdrlen = htonl(tx_info->scmd0_ivgen_hdrlen); | |
1176 | cpl->scmd1 = cpu_to_be64(tx_info->record_no); | |
1177 | ||
1178 | pos = cpl + 1; | |
1179 | /* check if space left to fill the keys */ | |
1180 | left = (void *)q->q.stat - pos; | |
1181 | if (!left) { | |
1182 | left = (void *)end - (void *)q->q.stat; | |
1183 | pos = q->q.desc; | |
1184 | end = pos + left; | |
1185 | } | |
1186 | ||
1187 | pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos, | |
1188 | tx_info->key_ctx_len); | |
1189 | left = (void *)q->q.stat - pos; | |
1190 | ||
1191 | if (!left) { | |
1192 | left = (void *)end - (void *)q->q.stat; | |
1193 | pos = q->q.desc; | |
1194 | end = pos + left; | |
1195 | } | |
1196 | /* CPL_TX_DATA */ | |
1197 | tx_data = (void *)pos; | |
1198 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1199 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | TX_LENGTH_V(skb->data_len)); | |
1200 | ||
1201 | tx_data->rsvd = htonl(tcp_seq); | |
1202 | ||
1203 | tx_data->flags = htonl(TX_BYPASS_F); | |
1204 | if (tcp_push) | |
1205 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1206 | ||
1207 | /* check left again, it might go beyond queue limit */ | |
1208 | pos = tx_data + 1; | |
1209 | left = (void *)q->q.stat - pos; | |
1210 | ||
1211 | /* check the position again */ | |
1212 | if (!left) { | |
1213 | left = (void *)end - (void *)q->q.stat; | |
1214 | pos = q->q.desc; | |
1215 | end = pos + left; | |
1216 | } | |
1217 | ||
1218 | /* send the complete packet except the header */ | |
1219 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1220 | sgl_sdesc->addr); | |
1221 | sgl_sdesc->skb = skb; | |
1222 | ||
1223 | chcr_txq_advance(&q->q, ndesc); | |
1224 | cxgb4_ring_tx_db(adap, &q->q, ndesc); | |
62370a4f | 1225 | atomic64_inc(&adap->chcr_stats.ktls_tx_send_records); |
5a4b9fe7 RM |
1226 | |
1227 | return 0; | |
1228 | } | |
1229 | ||
dc05f3df RM |
1230 | /* |
1231 | * chcr_ktls_xmit_wr_short: This is to send out partial records. If its | |
1232 | * a middle part of a record, fetch the prior data to make it 16 byte aligned | |
1233 | * and then only send it out. | |
1234 | * | |
1235 | * @skb - skb contains partial record.. | |
1236 | * @tx_info - driver specific tls info. | |
1237 | * @q - TX queue. | |
1238 | * @tcp_seq | |
1239 | * @tcp_push - tcp push bit. | |
1240 | * @mss - segment size. | |
1241 | * @tls_rec_offset - offset from start of the tls record. | |
1242 | * @perior_data - data before the current segment, required to make this record | |
1243 | * 16 byte aligned. | |
1244 | * @prior_data_len - prior_data length (less than 16) | |
1245 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1246 | */ | |
1247 | static int chcr_ktls_xmit_wr_short(struct sk_buff *skb, | |
1248 | struct chcr_ktls_info *tx_info, | |
1249 | struct sge_eth_txq *q, | |
1250 | u32 tcp_seq, bool tcp_push, u32 mss, | |
1251 | u32 tls_rec_offset, u8 *prior_data, | |
1252 | u32 prior_data_len) | |
1253 | { | |
1254 | struct adapter *adap = tx_info->adap; | |
1255 | u32 len16, wr_mid = 0, cipher_start; | |
1256 | unsigned int flits = 0, ndesc; | |
1257 | int credits, left, last_desc; | |
1258 | struct tx_sw_desc *sgl_sdesc; | |
1259 | struct cpl_tx_data *tx_data; | |
1260 | struct cpl_tx_sec_pdu *cpl; | |
1261 | struct ulptx_idata *idata; | |
1262 | struct ulp_txpkt *ulptx; | |
1263 | struct fw_ulptx_wr *wr; | |
1264 | __be64 iv_record; | |
1265 | void *pos; | |
1266 | u64 *end; | |
1267 | ||
1268 | /* get the number of flits required, it's a partial record so 2 flits | |
1269 | * (AES_BLOCK_SIZE) will be added. | |
1270 | */ | |
1271 | flits = chcr_ktls_get_tx_flits(skb, tx_info->key_ctx_len) + 2; | |
1272 | /* get the correct 8 byte IV of this record */ | |
1273 | iv_record = cpu_to_be64(tx_info->iv + tx_info->record_no); | |
1274 | /* If it's a middle record and not 16 byte aligned to run AES CTR, need | |
1275 | * to make it 16 byte aligned. So atleadt 2 extra flits of immediate | |
1276 | * data will be added. | |
1277 | */ | |
1278 | if (prior_data_len) | |
1279 | flits += 2; | |
1280 | /* number of descriptors */ | |
1281 | ndesc = chcr_flits_to_desc(flits); | |
1282 | /* check if enough credits available */ | |
1283 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1284 | if (unlikely(credits < 0)) { | |
1285 | chcr_eth_txq_stop(q); | |
1286 | return NETDEV_TX_BUSY; | |
1287 | } | |
1288 | ||
1289 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1290 | chcr_eth_txq_stop(q); | |
1291 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1292 | } | |
1293 | ||
1294 | last_desc = q->q.pidx + ndesc - 1; | |
1295 | if (last_desc >= q->q.size) | |
1296 | last_desc -= q->q.size; | |
1297 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1298 | ||
1299 | if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) { | |
1300 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1301 | q->mapping_err++; | |
1302 | return NETDEV_TX_BUSY; | |
1303 | } | |
1304 | ||
1305 | pos = &q->q.desc[q->q.pidx]; | |
1306 | end = (u64 *)pos + flits; | |
1307 | /* FW_ULPTX_WR */ | |
1308 | wr = pos; | |
1309 | /* WR will need len16 */ | |
1310 | len16 = DIV_ROUND_UP(flits, 2); | |
1311 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1312 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1313 | wr->cookie = 0; | |
1314 | pos += sizeof(*wr); | |
1315 | /* ULP_TXPKT */ | |
1316 | ulptx = pos; | |
1317 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1318 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1319 | ULP_TXPKT_FID_V(q->q.cntxt_id) | | |
1320 | ULP_TXPKT_RO_F); | |
1321 | ulptx->len = htonl(len16 - 1); | |
1322 | /* ULPTX_IDATA sub-command */ | |
1323 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1324 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1325 | /* idata length will include cpl_tx_sec_pdu + key context size + | |
1326 | * cpl_tx_data header. | |
1327 | */ | |
1328 | idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len + | |
1329 | sizeof(*tx_data) + AES_BLOCK_LEN + prior_data_len); | |
1330 | /* SEC CPL */ | |
1331 | cpl = (struct cpl_tx_sec_pdu *)(idata + 1); | |
1332 | /* cipher start will have tls header + iv size extra if its a header | |
1333 | * part of tls record. else only 16 byte IV will be added. | |
1334 | */ | |
1335 | cipher_start = | |
1336 | AES_BLOCK_LEN + 1 + | |
1337 | (!tls_rec_offset ? TLS_HEADER_SIZE + tx_info->iv_size : 0); | |
1338 | ||
1339 | cpl->op_ivinsrtofst = | |
1340 | htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | | |
1341 | CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) | | |
1342 | CPL_TX_SEC_PDU_IVINSRTOFST_V(1)); | |
1343 | cpl->pldlen = htonl(skb->data_len + AES_BLOCK_LEN + prior_data_len); | |
1344 | cpl->aadstart_cipherstop_hi = | |
1345 | htonl(CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start)); | |
1346 | cpl->cipherstop_lo_authinsert = 0; | |
1347 | /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */ | |
1348 | cpl->seqno_numivs = htonl(tx_info->scmd0_short_seqno_numivs); | |
1349 | cpl->ivgen_hdrlen = htonl(tx_info->scmd0_short_ivgen_hdrlen); | |
1350 | cpl->scmd1 = 0; | |
1351 | ||
1352 | pos = cpl + 1; | |
1353 | /* check if space left to fill the keys */ | |
1354 | left = (void *)q->q.stat - pos; | |
1355 | if (!left) { | |
1356 | left = (void *)end - (void *)q->q.stat; | |
1357 | pos = q->q.desc; | |
1358 | end = pos + left; | |
1359 | } | |
1360 | ||
1361 | pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos, | |
1362 | tx_info->key_ctx_len); | |
1363 | left = (void *)q->q.stat - pos; | |
1364 | ||
1365 | if (!left) { | |
1366 | left = (void *)end - (void *)q->q.stat; | |
1367 | pos = q->q.desc; | |
1368 | end = pos + left; | |
1369 | } | |
1370 | /* CPL_TX_DATA */ | |
1371 | tx_data = (void *)pos; | |
1372 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1373 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | | |
1374 | TX_LENGTH_V(skb->data_len + prior_data_len)); | |
1375 | tx_data->rsvd = htonl(tcp_seq); | |
1376 | tx_data->flags = htonl(TX_BYPASS_F); | |
1377 | if (tcp_push) | |
1378 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1379 | ||
1380 | /* check left again, it might go beyond queue limit */ | |
1381 | pos = tx_data + 1; | |
1382 | left = (void *)q->q.stat - pos; | |
1383 | ||
1384 | /* check the position again */ | |
1385 | if (!left) { | |
1386 | left = (void *)end - (void *)q->q.stat; | |
1387 | pos = q->q.desc; | |
1388 | end = pos + left; | |
1389 | } | |
1390 | /* copy the 16 byte IV for AES-CTR, which includes 4 bytes of salt, 8 | |
1391 | * bytes of actual IV and 4 bytes of 16 byte-sequence. | |
1392 | */ | |
1393 | memcpy(pos, tx_info->key_ctx.salt, tx_info->salt_size); | |
1394 | memcpy(pos + tx_info->salt_size, &iv_record, tx_info->iv_size); | |
1395 | *(__be32 *)(pos + tx_info->salt_size + tx_info->iv_size) = | |
1396 | htonl(2 + (tls_rec_offset ? ((tls_rec_offset - | |
1397 | (TLS_HEADER_SIZE + tx_info->iv_size)) / AES_BLOCK_LEN) : 0)); | |
1398 | ||
1399 | pos += 16; | |
1400 | /* Prior_data_len will always be less than 16 bytes, fill the | |
1401 | * prio_data_len after AES_CTRL_BLOCK and clear the remaining length | |
1402 | * to 0. | |
1403 | */ | |
1404 | if (prior_data_len) | |
1405 | pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16); | |
1406 | /* send the complete packet except the header */ | |
1407 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1408 | sgl_sdesc->addr); | |
1409 | sgl_sdesc->skb = skb; | |
1410 | ||
1411 | chcr_txq_advance(&q->q, ndesc); | |
1412 | cxgb4_ring_tx_db(adap, &q->q, ndesc); | |
1413 | ||
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | /* | |
1418 | * chcr_ktls_tx_plaintxt: This handler will take care of the records which has | |
1419 | * only plain text (only tls header and iv) | |
1420 | * @tx_info - driver specific tls info. | |
1421 | * @skb - skb contains partial record.. | |
1422 | * @tcp_seq | |
1423 | * @mss - segment size. | |
1424 | * @tcp_push - tcp push bit. | |
1425 | * @q - TX queue. | |
1426 | * @port_id : port number | |
1427 | * @perior_data - data before the current segment, required to make this record | |
1428 | * 16 byte aligned. | |
1429 | * @prior_data_len - prior_data length (less than 16) | |
1430 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1431 | */ | |
1432 | static int chcr_ktls_tx_plaintxt(struct chcr_ktls_info *tx_info, | |
1433 | struct sk_buff *skb, u32 tcp_seq, u32 mss, | |
1434 | bool tcp_push, struct sge_eth_txq *q, | |
1435 | u32 port_id, u8 *prior_data, | |
1436 | u32 prior_data_len) | |
1437 | { | |
1438 | int credits, left, len16, last_desc; | |
1439 | unsigned int flits = 0, ndesc; | |
1440 | struct tx_sw_desc *sgl_sdesc; | |
1441 | struct cpl_tx_data *tx_data; | |
1442 | struct ulptx_idata *idata; | |
1443 | struct ulp_txpkt *ulptx; | |
1444 | struct fw_ulptx_wr *wr; | |
1445 | u32 wr_mid = 0; | |
1446 | void *pos; | |
1447 | u64 *end; | |
1448 | ||
1449 | flits = DIV_ROUND_UP(CHCR_PLAIN_TX_DATA_LEN, 8); | |
1450 | flits += chcr_sgl_len(skb_shinfo(skb)->nr_frags); | |
1451 | if (prior_data_len) | |
1452 | flits += 2; | |
1453 | /* WR will need len16 */ | |
1454 | len16 = DIV_ROUND_UP(flits, 2); | |
1455 | /* check how many descriptors needed */ | |
1456 | ndesc = DIV_ROUND_UP(flits, 8); | |
1457 | ||
1458 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1459 | if (unlikely(credits < 0)) { | |
1460 | chcr_eth_txq_stop(q); | |
1461 | return NETDEV_TX_BUSY; | |
1462 | } | |
1463 | ||
1464 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1465 | chcr_eth_txq_stop(q); | |
1466 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1467 | } | |
1468 | ||
1469 | last_desc = q->q.pidx + ndesc - 1; | |
1470 | if (last_desc >= q->q.size) | |
1471 | last_desc -= q->q.size; | |
1472 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1473 | ||
1474 | if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb, | |
1475 | sgl_sdesc->addr) < 0)) { | |
1476 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1477 | q->mapping_err++; | |
1478 | return NETDEV_TX_BUSY; | |
1479 | } | |
1480 | ||
1481 | pos = &q->q.desc[q->q.pidx]; | |
1482 | end = (u64 *)pos + flits; | |
1483 | /* FW_ULPTX_WR */ | |
1484 | wr = pos; | |
1485 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1486 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1487 | wr->cookie = 0; | |
1488 | pos += sizeof(*wr); | |
1489 | /* ULP_TXPKT */ | |
1490 | ulptx = (struct ulp_txpkt *)(wr + 1); | |
1491 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1492 | ULP_TXPKT_DATAMODIFY_V(0) | | |
1493 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1494 | ULP_TXPKT_DEST_V(0) | | |
1495 | ULP_TXPKT_FID_V(q->q.cntxt_id) | ULP_TXPKT_RO_V(1)); | |
1496 | ulptx->len = htonl(len16 - 1); | |
1497 | /* ULPTX_IDATA sub-command */ | |
1498 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1499 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1500 | idata->len = htonl(sizeof(*tx_data) + prior_data_len); | |
1501 | /* CPL_TX_DATA */ | |
1502 | tx_data = (struct cpl_tx_data *)(idata + 1); | |
1503 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1504 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | | |
1505 | TX_LENGTH_V(skb->data_len + prior_data_len)); | |
1506 | /* set tcp seq number */ | |
1507 | tx_data->rsvd = htonl(tcp_seq); | |
1508 | tx_data->flags = htonl(TX_BYPASS_F); | |
1509 | if (tcp_push) | |
1510 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1511 | ||
1512 | pos = tx_data + 1; | |
1513 | /* apart from prior_data_len, we should set remaining part of 16 bytes | |
1514 | * to be zero. | |
1515 | */ | |
1516 | if (prior_data_len) | |
1517 | pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16); | |
1518 | ||
1519 | /* check left again, it might go beyond queue limit */ | |
1520 | left = (void *)q->q.stat - pos; | |
1521 | ||
1522 | /* check the position again */ | |
1523 | if (!left) { | |
1524 | left = (void *)end - (void *)q->q.stat; | |
1525 | pos = q->q.desc; | |
1526 | end = pos + left; | |
1527 | } | |
1528 | /* send the complete packet including the header */ | |
1529 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1530 | sgl_sdesc->addr); | |
1531 | sgl_sdesc->skb = skb; | |
1532 | ||
1533 | chcr_txq_advance(&q->q, ndesc); | |
1534 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
1535 | return 0; | |
1536 | } | |
1537 | ||
429765a1 RM |
1538 | /* |
1539 | * chcr_ktls_copy_record_in_skb | |
1540 | * @nskb - new skb where the frags to be added. | |
1541 | * @record - specific record which has complete 16k record in frags. | |
1542 | */ | |
1543 | static void chcr_ktls_copy_record_in_skb(struct sk_buff *nskb, | |
1544 | struct tls_record_info *record) | |
1545 | { | |
1546 | int i = 0; | |
1547 | ||
1548 | for (i = 0; i < record->num_frags; i++) { | |
1549 | skb_shinfo(nskb)->frags[i] = record->frags[i]; | |
1550 | /* increase the frag ref count */ | |
1551 | __skb_frag_ref(&skb_shinfo(nskb)->frags[i]); | |
1552 | } | |
1553 | ||
1554 | skb_shinfo(nskb)->nr_frags = record->num_frags; | |
1555 | nskb->data_len = record->len; | |
1556 | nskb->len += record->len; | |
1557 | nskb->truesize += record->len; | |
1558 | } | |
1559 | ||
1560 | /* | |
1561 | * chcr_ktls_update_snd_una: Reset the SEND_UNA. It will be done to avoid | |
1562 | * sending the same segment again. It will discard the segment which is before | |
1563 | * the current tx max. | |
1564 | * @tx_info - driver specific tls info. | |
1565 | * @q - TX queue. | |
1566 | * return: NET_TX_OK/NET_XMIT_DROP. | |
1567 | */ | |
1568 | static int chcr_ktls_update_snd_una(struct chcr_ktls_info *tx_info, | |
1569 | struct sge_eth_txq *q) | |
1570 | { | |
1571 | struct fw_ulptx_wr *wr; | |
1572 | unsigned int ndesc; | |
1573 | int credits; | |
1574 | void *pos; | |
1575 | u32 len; | |
1576 | ||
1577 | len = sizeof(*wr) + roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
1578 | ndesc = DIV_ROUND_UP(len, 64); | |
1579 | ||
1580 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1581 | if (unlikely(credits < 0)) { | |
1582 | chcr_eth_txq_stop(q); | |
1583 | return NETDEV_TX_BUSY; | |
1584 | } | |
1585 | ||
1586 | pos = &q->q.desc[q->q.pidx]; | |
1587 | ||
1588 | wr = pos; | |
1589 | /* ULPTX wr */ | |
1590 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1591 | wr->cookie = 0; | |
1592 | /* fill len in wr field */ | |
1593 | wr->flowid_len16 = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(len, 16))); | |
1594 | ||
1595 | pos += sizeof(*wr); | |
1596 | ||
1597 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
1598 | TCB_SND_UNA_RAW_W, | |
1599 | TCB_SND_UNA_RAW_V(TCB_SND_UNA_RAW_M), | |
1600 | TCB_SND_UNA_RAW_V(0), 0); | |
1601 | ||
1602 | chcr_txq_advance(&q->q, ndesc); | |
1603 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
1604 | ||
1605 | return 0; | |
1606 | } | |
1607 | ||
5a4b9fe7 RM |
1608 | /* |
1609 | * chcr_end_part_handler: This handler will handle the record which | |
1610 | * is complete or if record's end part is received. T6 adapter has a issue that | |
1611 | * it can't send out TAG with partial record so if its an end part then we have | |
1612 | * to send TAG as well and for which we need to fetch the complete record and | |
1613 | * send it to crypto module. | |
1614 | * @tx_info - driver specific tls info. | |
1615 | * @skb - skb contains partial record. | |
1616 | * @record - complete record of 16K size. | |
1617 | * @tcp_seq | |
1618 | * @mss - segment size in which TP needs to chop a packet. | |
1619 | * @tcp_push_no_fin - tcp push if fin is not set. | |
1620 | * @q - TX queue. | |
1621 | * @tls_end_offset - offset from end of the record. | |
1622 | * @last wr : check if this is the last part of the skb going out. | |
1623 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
1624 | */ | |
1625 | static int chcr_end_part_handler(struct chcr_ktls_info *tx_info, | |
1626 | struct sk_buff *skb, | |
1627 | struct tls_record_info *record, | |
1628 | u32 tcp_seq, int mss, bool tcp_push_no_fin, | |
1629 | struct sge_eth_txq *q, | |
1630 | u32 tls_end_offset, bool last_wr) | |
1631 | { | |
1632 | struct sk_buff *nskb = NULL; | |
1633 | /* check if it is a complete record */ | |
1634 | if (tls_end_offset == record->len) { | |
1635 | nskb = skb; | |
62370a4f | 1636 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_complete_pkts); |
5a4b9fe7 | 1637 | } else { |
429765a1 RM |
1638 | dev_kfree_skb_any(skb); |
1639 | ||
1640 | nskb = alloc_skb(0, GFP_KERNEL); | |
1641 | if (!nskb) | |
1642 | return NETDEV_TX_BUSY; | |
1643 | /* copy complete record in skb */ | |
1644 | chcr_ktls_copy_record_in_skb(nskb, record); | |
1645 | /* packet is being sent from the beginning, update the tcp_seq | |
1646 | * accordingly. | |
1647 | */ | |
1648 | tcp_seq = tls_record_start_seq(record); | |
1649 | /* reset snd una, so the middle record won't send the already | |
1650 | * sent part. | |
1651 | */ | |
1652 | if (chcr_ktls_update_snd_una(tx_info, q)) | |
1653 | goto out; | |
62370a4f | 1654 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_end_pkts); |
5a4b9fe7 RM |
1655 | } |
1656 | ||
1657 | if (chcr_ktls_xmit_wr_complete(nskb, tx_info, q, tcp_seq, | |
1658 | (last_wr && tcp_push_no_fin), | |
1659 | mss)) { | |
1660 | goto out; | |
1661 | } | |
1662 | return 0; | |
1663 | out: | |
429765a1 | 1664 | dev_kfree_skb_any(nskb); |
5a4b9fe7 RM |
1665 | return NETDEV_TX_BUSY; |
1666 | } | |
1667 | ||
dc05f3df RM |
1668 | /* |
1669 | * chcr_short_record_handler: This handler will take care of the records which | |
1670 | * doesn't have end part (1st part or the middle part(/s) of a record). In such | |
1671 | * cases, AES CTR will be used in place of AES GCM to send out partial packet. | |
1672 | * This partial record might be the first part of the record, or the middle | |
1673 | * part. In case of middle record we should fetch the prior data to make it 16 | |
1674 | * byte aligned. If it has a partial tls header or iv then get to the start of | |
1675 | * tls header. And if it has partial TAG, then remove the complete TAG and send | |
1676 | * only the payload. | |
1677 | * There is one more possibility that it gets a partial header, send that | |
1678 | * portion as a plaintext. | |
1679 | * @tx_info - driver specific tls info. | |
1680 | * @skb - skb contains partial record.. | |
1681 | * @record - complete record of 16K size. | |
1682 | * @tcp_seq | |
1683 | * @mss - segment size in which TP needs to chop a packet. | |
1684 | * @tcp_push_no_fin - tcp push if fin is not set. | |
1685 | * @q - TX queue. | |
1686 | * @tls_end_offset - offset from end of the record. | |
1687 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
1688 | */ | |
1689 | static int chcr_short_record_handler(struct chcr_ktls_info *tx_info, | |
1690 | struct sk_buff *skb, | |
1691 | struct tls_record_info *record, | |
1692 | u32 tcp_seq, int mss, bool tcp_push_no_fin, | |
1693 | struct sge_eth_txq *q, u32 tls_end_offset) | |
1694 | { | |
1695 | u32 tls_rec_offset = tcp_seq - tls_record_start_seq(record); | |
1696 | u8 prior_data[16] = {0}; | |
1697 | u32 prior_data_len = 0; | |
1698 | u32 data_len; | |
1699 | ||
1700 | /* check if the skb is ending in middle of tag/HASH, its a big | |
1701 | * trouble, send the packet before the HASH. | |
1702 | */ | |
1703 | int remaining_record = tls_end_offset - skb->data_len; | |
1704 | ||
1705 | if (remaining_record > 0 && | |
1706 | remaining_record < TLS_CIPHER_AES_GCM_128_TAG_SIZE) { | |
1707 | int trimmed_len = skb->data_len - | |
1708 | (TLS_CIPHER_AES_GCM_128_TAG_SIZE - remaining_record); | |
1709 | struct sk_buff *tmp_skb = NULL; | |
1710 | /* don't process the pkt if it is only a partial tag */ | |
1711 | if (skb->data_len < TLS_CIPHER_AES_GCM_128_TAG_SIZE) | |
1712 | goto out; | |
1713 | ||
1714 | WARN_ON(trimmed_len > skb->data_len); | |
1715 | ||
1716 | /* shift to those many bytes */ | |
1717 | tmp_skb = alloc_skb(0, GFP_KERNEL); | |
1718 | if (unlikely(!tmp_skb)) | |
1719 | goto out; | |
1720 | ||
1721 | chcr_ktls_skb_shift(tmp_skb, skb, trimmed_len); | |
1722 | /* free the last trimmed portion */ | |
1723 | dev_kfree_skb_any(skb); | |
1724 | skb = tmp_skb; | |
62370a4f | 1725 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_trimmed_pkts); |
dc05f3df RM |
1726 | } |
1727 | data_len = skb->data_len; | |
1728 | /* check if the middle record's start point is 16 byte aligned. CTR | |
1729 | * needs 16 byte aligned start point to start encryption. | |
1730 | */ | |
1731 | if (tls_rec_offset) { | |
1732 | /* there is an offset from start, means its a middle record */ | |
1733 | int remaining = 0; | |
1734 | ||
1735 | if (tls_rec_offset < (TLS_HEADER_SIZE + tx_info->iv_size)) { | |
1736 | prior_data_len = tls_rec_offset; | |
1737 | tls_rec_offset = 0; | |
1738 | remaining = 0; | |
1739 | } else { | |
1740 | prior_data_len = | |
1741 | (tls_rec_offset - | |
1742 | (TLS_HEADER_SIZE + tx_info->iv_size)) | |
1743 | % AES_BLOCK_LEN; | |
1744 | remaining = tls_rec_offset - prior_data_len; | |
1745 | } | |
1746 | ||
1747 | /* if prior_data_len is not zero, means we need to fetch prior | |
1748 | * data to make this record 16 byte aligned, or we need to reach | |
1749 | * to start offset. | |
1750 | */ | |
1751 | if (prior_data_len) { | |
1752 | int i = 0; | |
1753 | u8 *data = NULL; | |
1754 | skb_frag_t *f; | |
1755 | u8 *vaddr; | |
1756 | int frag_size = 0, frag_delta = 0; | |
1757 | ||
1758 | while (remaining > 0) { | |
1759 | frag_size = skb_frag_size(&record->frags[i]); | |
1760 | if (remaining < frag_size) | |
1761 | break; | |
1762 | ||
1763 | remaining -= frag_size; | |
1764 | i++; | |
1765 | } | |
1766 | f = &record->frags[i]; | |
1767 | vaddr = kmap_atomic(skb_frag_page(f)); | |
1768 | ||
1769 | data = vaddr + skb_frag_off(f) + remaining; | |
1770 | frag_delta = skb_frag_size(f) - remaining; | |
1771 | ||
1772 | if (frag_delta >= prior_data_len) { | |
1773 | memcpy(prior_data, data, prior_data_len); | |
1774 | kunmap_atomic(vaddr); | |
1775 | } else { | |
1776 | memcpy(prior_data, data, frag_delta); | |
1777 | kunmap_atomic(vaddr); | |
1778 | /* get the next page */ | |
1779 | f = &record->frags[i + 1]; | |
1780 | vaddr = kmap_atomic(skb_frag_page(f)); | |
1781 | data = vaddr + skb_frag_off(f); | |
1782 | memcpy(prior_data + frag_delta, | |
1783 | data, (prior_data_len - frag_delta)); | |
1784 | kunmap_atomic(vaddr); | |
1785 | } | |
1786 | /* reset tcp_seq as per the prior_data_required len */ | |
1787 | tcp_seq -= prior_data_len; | |
1788 | /* include prio_data_len for further calculation. | |
1789 | */ | |
1790 | data_len += prior_data_len; | |
1791 | } | |
1792 | /* reset snd una, so the middle record won't send the already | |
1793 | * sent part. | |
1794 | */ | |
1795 | if (chcr_ktls_update_snd_una(tx_info, q)) | |
1796 | goto out; | |
62370a4f | 1797 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_middle_pkts); |
dc05f3df RM |
1798 | } else { |
1799 | /* Else means, its a partial first part of the record. Check if | |
1800 | * its only the header, don't need to send for encryption then. | |
1801 | */ | |
1802 | if (data_len <= TLS_HEADER_SIZE + tx_info->iv_size) { | |
1803 | if (chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss, | |
1804 | tcp_push_no_fin, q, | |
1805 | tx_info->port_id, | |
1806 | prior_data, | |
1807 | prior_data_len)) { | |
1808 | goto out; | |
1809 | } | |
1810 | return 0; | |
1811 | } | |
62370a4f | 1812 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_start_pkts); |
dc05f3df RM |
1813 | } |
1814 | ||
1815 | if (chcr_ktls_xmit_wr_short(skb, tx_info, q, tcp_seq, tcp_push_no_fin, | |
1816 | mss, tls_rec_offset, prior_data, | |
1817 | prior_data_len)) { | |
1818 | goto out; | |
1819 | } | |
1820 | ||
1821 | return 0; | |
1822 | out: | |
1823 | dev_kfree_skb_any(skb); | |
1824 | return NETDEV_TX_BUSY; | |
1825 | } | |
1826 | ||
5a4b9fe7 RM |
1827 | /* nic tls TX handler */ |
1828 | int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev) | |
1829 | { | |
1830 | struct chcr_ktls_ofld_ctx_tx *tx_ctx; | |
1831 | struct tcphdr *th = tcp_hdr(skb); | |
1832 | int data_len, qidx, ret = 0, mss; | |
1833 | struct tls_record_info *record; | |
62370a4f | 1834 | struct chcr_stats_debug *stats; |
5a4b9fe7 RM |
1835 | struct chcr_ktls_info *tx_info; |
1836 | u32 tls_end_offset, tcp_seq; | |
1837 | struct tls_context *tls_ctx; | |
1838 | struct sk_buff *local_skb; | |
1839 | int new_connection_state; | |
1840 | struct sge_eth_txq *q; | |
1841 | struct adapter *adap; | |
1842 | unsigned long flags; | |
1843 | ||
1844 | tcp_seq = ntohl(th->seq); | |
1845 | ||
1846 | mss = skb_is_gso(skb) ? skb_shinfo(skb)->gso_size : skb->data_len; | |
1847 | ||
1848 | /* check if we haven't set it for ktls offload */ | |
1849 | if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)) | |
1850 | goto out; | |
1851 | ||
1852 | tls_ctx = tls_get_ctx(skb->sk); | |
1853 | if (unlikely(tls_ctx->netdev != dev)) | |
1854 | goto out; | |
1855 | ||
1856 | tx_ctx = chcr_get_ktls_tx_context(tls_ctx); | |
1857 | tx_info = tx_ctx->chcr_info; | |
1858 | ||
1859 | if (unlikely(!tx_info)) | |
1860 | goto out; | |
1861 | ||
1862 | /* check the connection state, we don't need to pass new connection | |
1863 | * state, state machine will check and update the new state if it is | |
1864 | * stuck due to responses not received from HW. | |
1865 | * Start the tx handling only if state is KTLS_CONN_TX_READY. | |
1866 | */ | |
1867 | new_connection_state = chcr_ktls_update_connection_state(tx_info, 0); | |
1868 | if (new_connection_state != KTLS_CONN_TX_READY) | |
1869 | goto out; | |
1870 | ||
1871 | /* don't touch the original skb, make a new skb to extract each records | |
1872 | * and send them separately. | |
1873 | */ | |
1874 | local_skb = alloc_skb(0, GFP_KERNEL); | |
1875 | ||
1876 | if (unlikely(!local_skb)) | |
1877 | return NETDEV_TX_BUSY; | |
1878 | ||
1879 | adap = tx_info->adap; | |
62370a4f RM |
1880 | stats = &adap->chcr_stats; |
1881 | ||
5a4b9fe7 RM |
1882 | qidx = skb->queue_mapping; |
1883 | q = &adap->sge.ethtxq[qidx + tx_info->first_qset]; | |
1884 | cxgb4_reclaim_completed_tx(adap, &q->q, true); | |
429765a1 RM |
1885 | /* if tcp options are set but finish is not send the options first */ |
1886 | if (!th->fin && chcr_ktls_check_tcp_options(th)) { | |
1887 | ret = chcr_ktls_write_tcp_options(tx_info, skb, q, | |
1888 | tx_info->tx_chan); | |
1889 | if (ret) | |
1890 | return NETDEV_TX_BUSY; | |
1891 | } | |
5a4b9fe7 RM |
1892 | /* update tcb */ |
1893 | ret = chcr_ktls_xmit_tcb_cpls(tx_info, q, ntohl(th->seq), | |
1894 | ntohl(th->ack_seq), | |
1895 | ntohs(th->window)); | |
1896 | if (ret) { | |
1897 | dev_kfree_skb_any(local_skb); | |
1898 | return NETDEV_TX_BUSY; | |
1899 | } | |
1900 | ||
1901 | /* copy skb contents into local skb */ | |
1902 | chcr_ktls_skb_copy(skb, local_skb); | |
1903 | ||
1904 | /* go through the skb and send only one record at a time. */ | |
1905 | data_len = skb->data_len; | |
429765a1 | 1906 | /* TCP segments can be in received either complete or partial. |
5a4b9fe7 RM |
1907 | * chcr_end_part_handler will handle cases if complete record or end |
1908 | * part of the record is received. Incase of partial end part of record, | |
1909 | * we will send the complete record again. | |
1910 | */ | |
62370a4f | 1911 | |
5a4b9fe7 RM |
1912 | do { |
1913 | int i; | |
1914 | ||
1915 | cxgb4_reclaim_completed_tx(adap, &q->q, true); | |
1916 | /* lock taken */ | |
1917 | spin_lock_irqsave(&tx_ctx->base.lock, flags); | |
1918 | /* fetch the tls record */ | |
1919 | record = tls_get_record(&tx_ctx->base, tcp_seq, | |
1920 | &tx_info->record_no); | |
1921 | /* By the time packet reached to us, ACK is received, and record | |
1922 | * won't be found in that case, handle it gracefully. | |
1923 | */ | |
1924 | if (unlikely(!record)) { | |
1925 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
62370a4f | 1926 | atomic64_inc(&stats->ktls_tx_drop_no_sync_data); |
5a4b9fe7 RM |
1927 | goto out; |
1928 | } | |
1929 | ||
1930 | if (unlikely(tls_record_is_start_marker(record))) { | |
1931 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
62370a4f | 1932 | atomic64_inc(&stats->ktls_tx_skip_no_sync_data); |
5a4b9fe7 RM |
1933 | goto out; |
1934 | } | |
1935 | ||
1936 | /* increase page reference count of the record, so that there | |
1937 | * won't be any chance of page free in middle if in case stack | |
1938 | * receives ACK and try to delete the record. | |
1939 | */ | |
1940 | for (i = 0; i < record->num_frags; i++) | |
1941 | __skb_frag_ref(&record->frags[i]); | |
1942 | /* lock cleared */ | |
1943 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
1944 | ||
1945 | tls_end_offset = record->end_seq - tcp_seq; | |
1946 | ||
1947 | pr_debug("seq 0x%x, end_seq 0x%x prev_seq 0x%x, datalen 0x%x\n", | |
1948 | tcp_seq, record->end_seq, tx_info->prev_seq, data_len); | |
1949 | /* if a tls record is finishing in this SKB */ | |
1950 | if (tls_end_offset <= data_len) { | |
1951 | struct sk_buff *nskb = NULL; | |
1952 | ||
1953 | if (tls_end_offset < data_len) { | |
429765a1 RM |
1954 | nskb = alloc_skb(0, GFP_KERNEL); |
1955 | if (unlikely(!nskb)) { | |
1956 | ret = -ENOMEM; | |
1957 | goto clear_ref; | |
1958 | } | |
1959 | ||
1960 | chcr_ktls_skb_shift(nskb, local_skb, | |
1961 | tls_end_offset); | |
5a4b9fe7 RM |
1962 | } else { |
1963 | /* its the only record in this skb, directly | |
1964 | * point it. | |
1965 | */ | |
1966 | nskb = local_skb; | |
1967 | } | |
1968 | ret = chcr_end_part_handler(tx_info, nskb, record, | |
1969 | tcp_seq, mss, | |
1970 | (!th->fin && th->psh), q, | |
1971 | tls_end_offset, | |
1972 | (nskb == local_skb)); | |
1973 | ||
1974 | if (ret && nskb != local_skb) | |
1975 | dev_kfree_skb_any(local_skb); | |
1976 | ||
1977 | data_len -= tls_end_offset; | |
1978 | /* tcp_seq increment is required to handle next record. | |
1979 | */ | |
1980 | tcp_seq += tls_end_offset; | |
dc05f3df RM |
1981 | } else { |
1982 | ret = chcr_short_record_handler(tx_info, local_skb, | |
1983 | record, tcp_seq, mss, | |
1984 | (!th->fin && th->psh), | |
1985 | q, tls_end_offset); | |
1986 | data_len = 0; | |
5a4b9fe7 RM |
1987 | } |
1988 | clear_ref: | |
1989 | /* clear the frag ref count which increased locally before */ | |
1990 | for (i = 0; i < record->num_frags; i++) { | |
1991 | /* clear the frag ref count */ | |
1992 | __skb_frag_unref(&record->frags[i]); | |
1993 | } | |
dc05f3df | 1994 | /* if any failure, come out from the loop. */ |
5a4b9fe7 RM |
1995 | if (ret) |
1996 | goto out; | |
dc05f3df | 1997 | /* length should never be less than 0 */ |
5a4b9fe7 RM |
1998 | WARN_ON(data_len < 0); |
1999 | ||
2000 | } while (data_len > 0); | |
2001 | ||
2002 | tx_info->prev_seq = ntohl(th->seq) + skb->data_len; | |
62370a4f RM |
2003 | |
2004 | atomic64_inc(&stats->ktls_tx_encrypted_packets); | |
2005 | atomic64_add(skb->data_len, &stats->ktls_tx_encrypted_bytes); | |
2006 | ||
429765a1 RM |
2007 | /* tcp finish is set, send a separate tcp msg including all the options |
2008 | * as well. | |
2009 | */ | |
2010 | if (th->fin) | |
2011 | chcr_ktls_write_tcp_options(tx_info, skb, q, tx_info->tx_chan); | |
2012 | ||
5a4b9fe7 RM |
2013 | out: |
2014 | dev_kfree_skb_any(skb); | |
2015 | return NETDEV_TX_OK; | |
2016 | } | |
34aba2c4 | 2017 | #endif /* CONFIG_CHELSIO_TLS_DEVICE */ |