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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 | ||
62370a4f RM |
224 | /* |
225 | * chcr_ktls_act_open_req6: creates TCB entry for ipv6 connection. | |
226 | * @sk - tcp socket. | |
227 | * @tx_info - driver specific tls info. | |
228 | * @atid - connection active tid. | |
229 | * return - send success/failure. | |
230 | */ | |
231 | static int chcr_ktls_act_open_req6(struct sock *sk, | |
232 | struct chcr_ktls_info *tx_info, | |
233 | int atid) | |
234 | { | |
235 | struct inet_sock *inet = inet_sk(sk); | |
236 | struct cpl_t6_act_open_req6 *cpl6; | |
237 | struct cpl_act_open_req6 *cpl; | |
238 | struct sk_buff *skb; | |
239 | unsigned int len; | |
240 | int qid_atid; | |
241 | u64 options; | |
242 | ||
243 | len = sizeof(*cpl6); | |
244 | skb = alloc_skb(len, GFP_KERNEL); | |
245 | if (unlikely(!skb)) | |
246 | return -ENOMEM; | |
247 | /* mark it a control pkt */ | |
248 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); | |
249 | ||
250 | cpl6 = __skb_put_zero(skb, len); | |
251 | cpl = (struct cpl_act_open_req6 *)cpl6; | |
252 | INIT_TP_WR(cpl6, 0); | |
253 | qid_atid = TID_QID_V(tx_info->rx_qid) | TID_TID_V(atid); | |
254 | OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid)); | |
255 | cpl->local_port = inet->inet_sport; | |
256 | cpl->peer_port = inet->inet_dport; | |
257 | cpl->local_ip_hi = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[0]; | |
258 | cpl->local_ip_lo = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[8]; | |
259 | cpl->peer_ip_hi = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[0]; | |
260 | cpl->peer_ip_lo = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[8]; | |
261 | ||
262 | /* first 64 bit option field. */ | |
263 | options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F | | |
264 | SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan); | |
265 | cpl->opt0 = cpu_to_be64(options); | |
266 | /* next 64 bit option field. */ | |
267 | options = | |
268 | TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]); | |
269 | cpl->opt2 = htonl(options); | |
270 | ||
271 | return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te); | |
272 | } | |
273 | ||
34aba2c4 RM |
274 | /* |
275 | * chcr_setup_connection: create a TCB entry so that TP will form tcp packets. | |
276 | * @sk - tcp socket. | |
277 | * @tx_info - driver specific tls info. | |
278 | * return: NET_TX_OK/NET_XMIT_DROP | |
279 | */ | |
280 | static int chcr_setup_connection(struct sock *sk, | |
281 | struct chcr_ktls_info *tx_info) | |
282 | { | |
283 | struct tid_info *t = &tx_info->adap->tids; | |
284 | int atid, ret = 0; | |
285 | ||
286 | atid = cxgb4_alloc_atid(t, tx_info); | |
287 | if (atid == -1) | |
288 | return -EINVAL; | |
289 | ||
290 | tx_info->atid = atid; | |
291 | tx_info->ip_family = sk->sk_family; | |
292 | ||
293 | if (sk->sk_family == AF_INET || | |
294 | (sk->sk_family == AF_INET6 && !sk->sk_ipv6only && | |
295 | ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED)) { | |
296 | tx_info->ip_family = AF_INET; | |
297 | ret = chcr_ktls_act_open_req(sk, tx_info, atid); | |
298 | } else { | |
299 | tx_info->ip_family = AF_INET6; | |
62370a4f RM |
300 | ret = |
301 | cxgb4_clip_get(tx_info->netdev, | |
302 | (const u32 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8, | |
303 | 1); | |
304 | if (ret) | |
305 | goto out; | |
306 | ret = chcr_ktls_act_open_req6(sk, tx_info, atid); | |
34aba2c4 RM |
307 | } |
308 | ||
309 | /* if return type is NET_XMIT_CN, msg will be sent but delayed, mark ret | |
310 | * success, if any other return type clear atid and return that failure. | |
311 | */ | |
312 | if (ret) { | |
313 | if (ret == NET_XMIT_CN) | |
314 | ret = 0; | |
315 | else | |
316 | cxgb4_free_atid(t, atid); | |
8a30923e | 317 | goto out; |
34aba2c4 RM |
318 | } |
319 | ||
8a30923e RM |
320 | /* update the connection state */ |
321 | chcr_ktls_update_connection_state(tx_info, KTLS_CONN_ACT_OPEN_REQ); | |
322 | out: | |
34aba2c4 RM |
323 | return ret; |
324 | } | |
325 | ||
326 | /* | |
327 | * chcr_set_tcb_field: update tcb fields. | |
328 | * @tx_info - driver specific tls info. | |
329 | * @word - TCB word. | |
330 | * @mask - TCB word related mask. | |
331 | * @val - TCB word related value. | |
332 | * @no_reply - set 1 if not looking for TP response. | |
333 | */ | |
334 | static int chcr_set_tcb_field(struct chcr_ktls_info *tx_info, u16 word, | |
335 | u64 mask, u64 val, int no_reply) | |
336 | { | |
337 | struct cpl_set_tcb_field *req; | |
338 | struct sk_buff *skb; | |
339 | ||
340 | skb = alloc_skb(sizeof(struct cpl_set_tcb_field), GFP_ATOMIC); | |
341 | if (!skb) | |
342 | return -ENOMEM; | |
343 | ||
344 | req = (struct cpl_set_tcb_field *)__skb_put_zero(skb, sizeof(*req)); | |
345 | INIT_TP_WR_CPL(req, CPL_SET_TCB_FIELD, tx_info->tid); | |
346 | req->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) | | |
347 | NO_REPLY_V(no_reply)); | |
348 | req->word_cookie = htons(TCB_WORD_V(word)); | |
349 | req->mask = cpu_to_be64(mask); | |
350 | req->val = cpu_to_be64(val); | |
351 | ||
352 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); | |
353 | return cxgb4_ofld_send(tx_info->netdev, skb); | |
354 | } | |
355 | ||
356 | /* | |
357 | * chcr_ktls_mark_tcb_close: mark tcb state to CLOSE | |
358 | * @tx_info - driver specific tls info. | |
359 | * return: NET_TX_OK/NET_XMIT_DROP. | |
360 | */ | |
361 | static int chcr_ktls_mark_tcb_close(struct chcr_ktls_info *tx_info) | |
362 | { | |
363 | return chcr_set_tcb_field(tx_info, TCB_T_STATE_W, | |
364 | TCB_T_STATE_V(TCB_T_STATE_M), | |
365 | CHCR_TCB_STATE_CLOSED, 1); | |
366 | } | |
367 | ||
368 | /* | |
369 | * chcr_ktls_dev_del: call back for tls_dev_del. | |
370 | * Remove the tid and l2t entry and close the connection. | |
371 | * it per connection basis. | |
372 | * @netdev - net device. | |
373 | * @tls_cts - tls context. | |
374 | * @direction - TX/RX crypto direction | |
375 | */ | |
376 | static void chcr_ktls_dev_del(struct net_device *netdev, | |
377 | struct tls_context *tls_ctx, | |
378 | enum tls_offload_ctx_dir direction) | |
379 | { | |
380 | struct chcr_ktls_ofld_ctx_tx *tx_ctx = | |
381 | chcr_get_ktls_tx_context(tls_ctx); | |
382 | struct chcr_ktls_info *tx_info = tx_ctx->chcr_info; | |
62370a4f | 383 | struct sock *sk; |
34aba2c4 RM |
384 | |
385 | if (!tx_info) | |
386 | return; | |
62370a4f | 387 | sk = tx_info->sk; |
34aba2c4 RM |
388 | |
389 | spin_lock(&tx_info->lock); | |
390 | tx_info->connection_state = KTLS_CONN_CLOSED; | |
391 | spin_unlock(&tx_info->lock); | |
392 | ||
62370a4f | 393 | /* clear l2t entry */ |
34aba2c4 RM |
394 | if (tx_info->l2te) |
395 | cxgb4_l2t_release(tx_info->l2te); | |
396 | ||
62370a4f RM |
397 | /* clear clip entry */ |
398 | if (tx_info->ip_family == AF_INET6) | |
399 | cxgb4_clip_release(netdev, | |
400 | (const u32 *)&sk->sk_v6_daddr.in6_u.u6_addr8, | |
401 | 1); | |
402 | ||
403 | /* clear tid */ | |
34aba2c4 RM |
404 | if (tx_info->tid != -1) { |
405 | /* clear tcb state and then release tid */ | |
406 | chcr_ktls_mark_tcb_close(tx_info); | |
407 | cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, | |
408 | tx_info->tid, tx_info->ip_family); | |
409 | } | |
62370a4f RM |
410 | |
411 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_connection_close); | |
34aba2c4 RM |
412 | kvfree(tx_info); |
413 | tx_ctx->chcr_info = NULL; | |
414 | } | |
415 | ||
416 | /* | |
417 | * chcr_ktls_dev_add: call back for tls_dev_add. | |
418 | * Create a tcb entry for TP. Also add l2t entry for the connection. And | |
419 | * generate keys & save those keys locally. | |
420 | * @netdev - net device. | |
421 | * @tls_cts - tls context. | |
422 | * @direction - TX/RX crypto direction | |
423 | * return: SUCCESS/FAILURE. | |
424 | */ | |
425 | static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk, | |
426 | enum tls_offload_ctx_dir direction, | |
427 | struct tls_crypto_info *crypto_info, | |
428 | u32 start_offload_tcp_sn) | |
429 | { | |
430 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
431 | struct chcr_ktls_ofld_ctx_tx *tx_ctx; | |
432 | struct chcr_ktls_info *tx_info; | |
433 | struct dst_entry *dst; | |
434 | struct adapter *adap; | |
435 | struct port_info *pi; | |
436 | struct neighbour *n; | |
437 | u8 daaddr[16]; | |
438 | int ret = -1; | |
439 | ||
440 | tx_ctx = chcr_get_ktls_tx_context(tls_ctx); | |
441 | ||
442 | pi = netdev_priv(netdev); | |
443 | adap = pi->adapter; | |
444 | if (direction == TLS_OFFLOAD_CTX_DIR_RX) { | |
445 | pr_err("not expecting for RX direction\n"); | |
446 | ret = -EINVAL; | |
447 | goto out; | |
448 | } | |
449 | if (tx_ctx->chcr_info) { | |
450 | ret = -EINVAL; | |
451 | goto out; | |
452 | } | |
453 | ||
454 | tx_info = kvzalloc(sizeof(*tx_info), GFP_KERNEL); | |
455 | if (!tx_info) { | |
456 | ret = -ENOMEM; | |
457 | goto out; | |
458 | } | |
459 | ||
460 | spin_lock_init(&tx_info->lock); | |
461 | ||
462 | /* clear connection state */ | |
463 | spin_lock(&tx_info->lock); | |
464 | tx_info->connection_state = KTLS_CONN_CLOSED; | |
465 | spin_unlock(&tx_info->lock); | |
466 | ||
467 | tx_info->sk = sk; | |
468 | /* initialize tid and atid to -1, 0 is a also a valid id. */ | |
469 | tx_info->tid = -1; | |
470 | tx_info->atid = -1; | |
471 | ||
472 | tx_info->adap = adap; | |
473 | tx_info->netdev = netdev; | |
5a4b9fe7 | 474 | tx_info->first_qset = pi->first_qset; |
34aba2c4 RM |
475 | tx_info->tx_chan = pi->tx_chan; |
476 | tx_info->smt_idx = pi->smt_idx; | |
477 | tx_info->port_id = pi->port_id; | |
478 | ||
479 | tx_info->rx_qid = chcr_get_first_rx_qid(adap); | |
480 | if (unlikely(tx_info->rx_qid < 0)) | |
481 | goto out2; | |
482 | ||
483 | tx_info->prev_seq = start_offload_tcp_sn; | |
484 | tx_info->tcp_start_seq_number = start_offload_tcp_sn; | |
485 | ||
8a30923e RM |
486 | /* save crypto keys */ |
487 | ret = chcr_ktls_save_keys(tx_info, crypto_info, direction); | |
488 | if (ret < 0) | |
489 | goto out2; | |
490 | ||
34aba2c4 RM |
491 | /* get peer ip */ |
492 | if (sk->sk_family == AF_INET || | |
493 | (sk->sk_family == AF_INET6 && !sk->sk_ipv6only && | |
494 | ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED)) { | |
495 | memcpy(daaddr, &sk->sk_daddr, 4); | |
496 | } else { | |
62370a4f | 497 | memcpy(daaddr, sk->sk_v6_daddr.in6_u.u6_addr8, 16); |
34aba2c4 RM |
498 | } |
499 | ||
500 | /* get the l2t index */ | |
501 | dst = sk_dst_get(sk); | |
502 | if (!dst) { | |
503 | pr_err("DST entry not found\n"); | |
504 | goto out2; | |
505 | } | |
506 | n = dst_neigh_lookup(dst, daaddr); | |
507 | if (!n || !n->dev) { | |
508 | pr_err("neighbour not found\n"); | |
509 | dst_release(dst); | |
510 | goto out2; | |
511 | } | |
512 | tx_info->l2te = cxgb4_l2t_get(adap->l2t, n, n->dev, 0); | |
513 | ||
514 | neigh_release(n); | |
515 | dst_release(dst); | |
516 | ||
517 | if (!tx_info->l2te) { | |
518 | pr_err("l2t entry not found\n"); | |
519 | goto out2; | |
520 | } | |
521 | ||
522 | tx_ctx->chcr_info = tx_info; | |
523 | ||
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 | ret = chcr_setup_connection(sk, tx_info); | |
528 | if (ret) | |
529 | goto out2; | |
530 | ||
62370a4f | 531 | atomic64_inc(&adap->chcr_stats.ktls_tx_connection_open); |
34aba2c4 RM |
532 | return 0; |
533 | out2: | |
534 | kvfree(tx_info); | |
535 | out: | |
62370a4f | 536 | atomic64_inc(&adap->chcr_stats.ktls_tx_connection_fail); |
34aba2c4 RM |
537 | return ret; |
538 | } | |
539 | ||
540 | static const struct tlsdev_ops chcr_ktls_ops = { | |
541 | .tls_dev_add = chcr_ktls_dev_add, | |
542 | .tls_dev_del = chcr_ktls_dev_del, | |
543 | }; | |
544 | ||
545 | /* | |
546 | * chcr_enable_ktls: add NETIF_F_HW_TLS_TX flag in all the ports. | |
547 | */ | |
548 | void chcr_enable_ktls(struct adapter *adap) | |
549 | { | |
550 | struct net_device *netdev; | |
551 | int i; | |
552 | ||
553 | for_each_port(adap, i) { | |
554 | netdev = adap->port[i]; | |
555 | netdev->features |= NETIF_F_HW_TLS_TX; | |
556 | netdev->hw_features |= NETIF_F_HW_TLS_TX; | |
557 | netdev->tlsdev_ops = &chcr_ktls_ops; | |
558 | } | |
559 | } | |
560 | ||
561 | /* | |
562 | * chcr_disable_ktls: remove NETIF_F_HW_TLS_TX flag from all the ports. | |
563 | */ | |
564 | void chcr_disable_ktls(struct adapter *adap) | |
565 | { | |
566 | struct net_device *netdev; | |
567 | int i; | |
568 | ||
569 | for_each_port(adap, i) { | |
570 | netdev = adap->port[i]; | |
571 | netdev->features &= ~NETIF_F_HW_TLS_TX; | |
572 | netdev->hw_features &= ~NETIF_F_HW_TLS_TX; | |
573 | netdev->tlsdev_ops = NULL; | |
574 | } | |
575 | } | |
8a30923e RM |
576 | |
577 | /* | |
578 | * chcr_init_tcb_fields: Initialize tcb fields to handle TCP seq number | |
579 | * handling. | |
580 | * @tx_info - driver specific tls info. | |
581 | * return: NET_TX_OK/NET_XMIT_DROP | |
582 | */ | |
583 | static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info) | |
584 | { | |
585 | int ret = 0; | |
586 | ||
587 | /* set tcb in offload and bypass */ | |
588 | ret = | |
589 | chcr_set_tcb_field(tx_info, TCB_T_FLAGS_W, | |
590 | TCB_T_FLAGS_V(TF_CORE_BYPASS_F | TF_NON_OFFLOAD_F), | |
591 | TCB_T_FLAGS_V(TF_CORE_BYPASS_F), 1); | |
592 | if (ret) | |
593 | return ret; | |
594 | /* reset snd_una and snd_next fields in tcb */ | |
595 | ret = chcr_set_tcb_field(tx_info, TCB_SND_UNA_RAW_W, | |
596 | TCB_SND_NXT_RAW_V(TCB_SND_NXT_RAW_M) | | |
597 | TCB_SND_UNA_RAW_V(TCB_SND_UNA_RAW_M), | |
598 | 0, 1); | |
599 | if (ret) | |
600 | return ret; | |
601 | ||
602 | /* reset send max */ | |
603 | ret = chcr_set_tcb_field(tx_info, TCB_SND_MAX_RAW_W, | |
604 | TCB_SND_MAX_RAW_V(TCB_SND_MAX_RAW_M), | |
605 | 0, 1); | |
606 | if (ret) | |
607 | return ret; | |
608 | ||
609 | /* update l2t index and request for tp reply to confirm tcb is | |
610 | * initialised to handle tx traffic. | |
611 | */ | |
612 | ret = chcr_set_tcb_field(tx_info, TCB_L2T_IX_W, | |
613 | TCB_L2T_IX_V(TCB_L2T_IX_M), | |
614 | TCB_L2T_IX_V(tx_info->l2te->idx), 0); | |
615 | return ret; | |
616 | } | |
617 | ||
618 | /* | |
619 | * chcr_ktls_cpl_act_open_rpl: connection reply received from TP. | |
620 | */ | |
621 | int chcr_ktls_cpl_act_open_rpl(struct adapter *adap, unsigned char *input) | |
622 | { | |
623 | const struct cpl_act_open_rpl *p = (void *)input; | |
624 | struct chcr_ktls_info *tx_info = NULL; | |
625 | unsigned int atid, tid, status; | |
626 | struct tid_info *t; | |
627 | ||
628 | tid = GET_TID(p); | |
629 | status = AOPEN_STATUS_G(ntohl(p->atid_status)); | |
630 | atid = TID_TID_G(AOPEN_ATID_G(ntohl(p->atid_status))); | |
631 | ||
632 | t = &adap->tids; | |
633 | tx_info = lookup_atid(t, atid); | |
634 | ||
635 | if (!tx_info || tx_info->atid != atid) { | |
636 | pr_err("tx_info or atid is not correct\n"); | |
637 | return -1; | |
638 | } | |
639 | ||
640 | if (!status) { | |
641 | tx_info->tid = tid; | |
642 | cxgb4_insert_tid(t, tx_info, tx_info->tid, tx_info->ip_family); | |
643 | ||
644 | cxgb4_free_atid(t, atid); | |
645 | tx_info->atid = -1; | |
646 | /* update the connection state */ | |
647 | chcr_ktls_update_connection_state(tx_info, | |
648 | KTLS_CONN_ACT_OPEN_RPL); | |
649 | } | |
650 | return 0; | |
651 | } | |
652 | ||
653 | /* | |
654 | * chcr_ktls_cpl_set_tcb_rpl: TCB reply received from TP. | |
655 | */ | |
656 | int chcr_ktls_cpl_set_tcb_rpl(struct adapter *adap, unsigned char *input) | |
657 | { | |
658 | const struct cpl_set_tcb_rpl *p = (void *)input; | |
659 | struct chcr_ktls_info *tx_info = NULL; | |
660 | struct tid_info *t; | |
a1dd3875 | 661 | u32 tid; |
8a30923e RM |
662 | |
663 | tid = GET_TID(p); | |
8a30923e RM |
664 | |
665 | t = &adap->tids; | |
666 | tx_info = lookup_tid(t, tid); | |
667 | if (!tx_info || tx_info->tid != tid) { | |
668 | pr_err("tx_info or atid is not correct\n"); | |
669 | return -1; | |
670 | } | |
671 | /* update the connection state */ | |
672 | chcr_ktls_update_connection_state(tx_info, KTLS_CONN_SET_TCB_RPL); | |
673 | return 0; | |
674 | } | |
5a4b9fe7 | 675 | |
071a43e6 AB |
676 | static void *__chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info, |
677 | u32 tid, void *pos, u16 word, u64 mask, | |
5a4b9fe7 RM |
678 | u64 val, u32 reply) |
679 | { | |
680 | struct cpl_set_tcb_field_core *cpl; | |
681 | struct ulptx_idata *idata; | |
682 | struct ulp_txpkt *txpkt; | |
5a4b9fe7 | 683 | |
5a4b9fe7 RM |
684 | /* ULP_TXPKT */ |
685 | txpkt = pos; | |
686 | txpkt->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | ULP_TXPKT_DEST_V(0)); | |
687 | txpkt->len = htonl(DIV_ROUND_UP(CHCR_SET_TCB_FIELD_LEN, 16)); | |
688 | ||
689 | /* ULPTX_IDATA sub-command */ | |
690 | idata = (struct ulptx_idata *)(txpkt + 1); | |
691 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); | |
692 | idata->len = htonl(sizeof(*cpl)); | |
693 | pos = idata + 1; | |
694 | ||
695 | cpl = pos; | |
696 | /* CPL_SET_TCB_FIELD */ | |
697 | OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
698 | cpl->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) | | |
699 | NO_REPLY_V(!reply)); | |
700 | cpl->word_cookie = htons(TCB_WORD_V(word)); | |
701 | cpl->mask = cpu_to_be64(mask); | |
702 | cpl->val = cpu_to_be64(val); | |
703 | ||
704 | /* ULPTX_NOOP */ | |
705 | idata = (struct ulptx_idata *)(cpl + 1); | |
706 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_NOOP)); | |
707 | idata->len = htonl(0); | |
071a43e6 | 708 | pos = idata + 1; |
5a4b9fe7 | 709 | |
071a43e6 AB |
710 | return pos; |
711 | } | |
712 | ||
713 | ||
714 | /* | |
715 | * chcr_write_cpl_set_tcb_ulp: update tcb values. | |
716 | * TCB is responsible to create tcp headers, so all the related values | |
717 | * should be correctly updated. | |
718 | * @tx_info - driver specific tls info. | |
719 | * @q - tx queue on which packet is going out. | |
720 | * @tid - TCB identifier. | |
721 | * @pos - current index where should we start writing. | |
722 | * @word - TCB word. | |
723 | * @mask - TCB word related mask. | |
724 | * @val - TCB word related value. | |
725 | * @reply - set 1 if looking for TP response. | |
726 | * return - next position to write. | |
727 | */ | |
728 | static void *chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info, | |
729 | struct sge_eth_txq *q, u32 tid, | |
730 | void *pos, u16 word, u64 mask, | |
731 | u64 val, u32 reply) | |
732 | { | |
733 | int left = (void *)q->q.stat - pos; | |
734 | ||
735 | if (unlikely(left < CHCR_SET_TCB_FIELD_LEN)) { | |
736 | if (!left) { | |
5a4b9fe7 | 737 | pos = q->q.desc; |
071a43e6 AB |
738 | } else { |
739 | u8 buf[48] = {0}; | |
740 | ||
741 | __chcr_write_cpl_set_tcb_ulp(tx_info, tid, buf, word, | |
742 | mask, val, reply); | |
743 | ||
744 | return chcr_copy_to_txd(buf, &q->q, pos, | |
745 | CHCR_SET_TCB_FIELD_LEN); | |
746 | } | |
5a4b9fe7 RM |
747 | } |
748 | ||
071a43e6 AB |
749 | pos = __chcr_write_cpl_set_tcb_ulp(tx_info, tid, pos, word, |
750 | mask, val, reply); | |
751 | ||
752 | /* check again if we are at the end of the queue */ | |
753 | if (left == CHCR_SET_TCB_FIELD_LEN) | |
754 | pos = q->q.desc; | |
755 | ||
5a4b9fe7 RM |
756 | return pos; |
757 | } | |
758 | ||
759 | /* | |
760 | * chcr_ktls_xmit_tcb_cpls: update tcb entry so that TP will create the header | |
761 | * with updated values like tcp seq, ack, window etc. | |
762 | * @tx_info - driver specific tls info. | |
763 | * @q - TX queue. | |
764 | * @tcp_seq | |
765 | * @tcp_ack | |
766 | * @tcp_win | |
767 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
768 | */ | |
769 | static int chcr_ktls_xmit_tcb_cpls(struct chcr_ktls_info *tx_info, | |
770 | struct sge_eth_txq *q, u64 tcp_seq, | |
771 | u64 tcp_ack, u64 tcp_win) | |
772 | { | |
773 | bool first_wr = ((tx_info->prev_ack == 0) && (tx_info->prev_win == 0)); | |
774 | u32 len, cpl = 0, ndesc, wr_len; | |
775 | struct fw_ulptx_wr *wr; | |
776 | int credits; | |
777 | void *pos; | |
778 | ||
779 | wr_len = sizeof(*wr); | |
780 | /* there can be max 4 cpls, check if we have enough credits */ | |
781 | len = wr_len + 4 * roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
782 | ndesc = DIV_ROUND_UP(len, 64); | |
783 | ||
784 | credits = chcr_txq_avail(&q->q) - ndesc; | |
785 | if (unlikely(credits < 0)) { | |
786 | chcr_eth_txq_stop(q); | |
787 | return NETDEV_TX_BUSY; | |
788 | } | |
789 | ||
790 | pos = &q->q.desc[q->q.pidx]; | |
791 | /* make space for WR, we'll fill it later when we know all the cpls | |
792 | * being sent out and have complete length. | |
793 | */ | |
794 | wr = pos; | |
795 | pos += wr_len; | |
796 | /* update tx_max if its a re-transmit or the first wr */ | |
797 | if (first_wr || tcp_seq != tx_info->prev_seq) { | |
798 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
799 | TCB_TX_MAX_W, | |
800 | TCB_TX_MAX_V(TCB_TX_MAX_M), | |
801 | TCB_TX_MAX_V(tcp_seq), 0); | |
802 | cpl++; | |
803 | } | |
804 | /* reset snd una if it's a re-transmit pkt */ | |
805 | if (tcp_seq != tx_info->prev_seq) { | |
806 | /* reset snd_una */ | |
807 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
808 | TCB_SND_UNA_RAW_W, | |
809 | TCB_SND_UNA_RAW_V | |
810 | (TCB_SND_UNA_RAW_M), | |
811 | TCB_SND_UNA_RAW_V(0), 0); | |
62370a4f | 812 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_ooo); |
5a4b9fe7 RM |
813 | cpl++; |
814 | } | |
815 | /* update ack */ | |
816 | if (first_wr || tx_info->prev_ack != tcp_ack) { | |
817 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
818 | TCB_RCV_NXT_W, | |
819 | TCB_RCV_NXT_V(TCB_RCV_NXT_M), | |
820 | TCB_RCV_NXT_V(tcp_ack), 0); | |
821 | tx_info->prev_ack = tcp_ack; | |
822 | cpl++; | |
823 | } | |
824 | /* update receive window */ | |
825 | if (first_wr || tx_info->prev_win != tcp_win) { | |
826 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
827 | TCB_RCV_WND_W, | |
828 | TCB_RCV_WND_V(TCB_RCV_WND_M), | |
829 | TCB_RCV_WND_V(tcp_win), 0); | |
830 | tx_info->prev_win = tcp_win; | |
831 | cpl++; | |
832 | } | |
833 | ||
834 | if (cpl) { | |
835 | /* get the actual length */ | |
836 | len = wr_len + cpl * roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
837 | /* ULPTX wr */ | |
838 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
839 | wr->cookie = 0; | |
840 | /* fill len in wr field */ | |
841 | wr->flowid_len16 = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(len, 16))); | |
842 | ||
843 | ndesc = DIV_ROUND_UP(len, 64); | |
844 | chcr_txq_advance(&q->q, ndesc); | |
845 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
846 | } | |
847 | return 0; | |
848 | } | |
849 | ||
850 | /* | |
851 | * chcr_ktls_skb_copy | |
852 | * @nskb - new skb where the frags to be added. | |
853 | * @skb - old skb from which frags will be copied. | |
854 | */ | |
855 | static void chcr_ktls_skb_copy(struct sk_buff *skb, struct sk_buff *nskb) | |
856 | { | |
857 | int i; | |
858 | ||
859 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
860 | skb_shinfo(nskb)->frags[i] = skb_shinfo(skb)->frags[i]; | |
861 | __skb_frag_ref(&skb_shinfo(nskb)->frags[i]); | |
862 | } | |
863 | ||
864 | skb_shinfo(nskb)->nr_frags = skb_shinfo(skb)->nr_frags; | |
865 | nskb->len += skb->data_len; | |
866 | nskb->data_len = skb->data_len; | |
867 | nskb->truesize += skb->data_len; | |
868 | } | |
869 | ||
870 | /* | |
871 | * chcr_ktls_get_tx_flits | |
872 | * returns number of flits to be sent out, it includes key context length, WR | |
873 | * size and skb fragments. | |
874 | */ | |
875 | static unsigned int | |
876 | chcr_ktls_get_tx_flits(const struct sk_buff *skb, unsigned int key_ctx_len) | |
877 | { | |
878 | return chcr_sgl_len(skb_shinfo(skb)->nr_frags) + | |
879 | DIV_ROUND_UP(key_ctx_len + CHCR_KTLS_WR_SIZE, 8); | |
880 | } | |
881 | ||
429765a1 RM |
882 | /* |
883 | * chcr_ktls_check_tcp_options: To check if there is any TCP option availbale | |
884 | * other than timestamp. | |
885 | * @skb - skb contains partial record.. | |
886 | * return: 1 / 0 | |
887 | */ | |
888 | static int | |
889 | chcr_ktls_check_tcp_options(struct tcphdr *tcp) | |
890 | { | |
891 | int cnt, opt, optlen; | |
892 | u_char *cp; | |
893 | ||
894 | cp = (u_char *)(tcp + 1); | |
895 | cnt = (tcp->doff << 2) - sizeof(struct tcphdr); | |
896 | for (; cnt > 0; cnt -= optlen, cp += optlen) { | |
897 | opt = cp[0]; | |
898 | if (opt == TCPOPT_EOL) | |
899 | break; | |
900 | if (opt == TCPOPT_NOP) { | |
901 | optlen = 1; | |
902 | } else { | |
903 | if (cnt < 2) | |
904 | break; | |
905 | optlen = cp[1]; | |
906 | if (optlen < 2 || optlen > cnt) | |
907 | break; | |
908 | } | |
909 | switch (opt) { | |
910 | case TCPOPT_NOP: | |
911 | break; | |
912 | default: | |
913 | return 1; | |
914 | } | |
915 | } | |
916 | return 0; | |
917 | } | |
918 | ||
919 | /* | |
920 | * chcr_ktls_write_tcp_options : TP can't send out all the options, we need to | |
921 | * send out separately. | |
922 | * @tx_info - driver specific tls info. | |
923 | * @skb - skb contains partial record.. | |
924 | * @q - TX queue. | |
925 | * @tx_chan - channel number. | |
926 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
927 | */ | |
928 | static int | |
929 | chcr_ktls_write_tcp_options(struct chcr_ktls_info *tx_info, struct sk_buff *skb, | |
930 | struct sge_eth_txq *q, uint32_t tx_chan) | |
931 | { | |
932 | struct fw_eth_tx_pkt_wr *wr; | |
933 | struct cpl_tx_pkt_core *cpl; | |
934 | u32 ctrl, iplen, maclen; | |
935 | struct ipv6hdr *ip6; | |
936 | unsigned int ndesc; | |
937 | struct tcphdr *tcp; | |
938 | int len16, pktlen; | |
939 | struct iphdr *ip; | |
940 | int credits; | |
941 | u8 buf[150]; | |
942 | void *pos; | |
943 | ||
944 | iplen = skb_network_header_len(skb); | |
945 | maclen = skb_mac_header_len(skb); | |
946 | ||
947 | /* packet length = eth hdr len + ip hdr len + tcp hdr len | |
948 | * (including options). | |
949 | */ | |
950 | pktlen = skb->len - skb->data_len; | |
951 | ||
952 | ctrl = sizeof(*cpl) + pktlen; | |
953 | len16 = DIV_ROUND_UP(sizeof(*wr) + ctrl, 16); | |
954 | /* check how many descriptors needed */ | |
955 | ndesc = DIV_ROUND_UP(len16, 4); | |
956 | ||
957 | credits = chcr_txq_avail(&q->q) - ndesc; | |
958 | if (unlikely(credits < 0)) { | |
959 | chcr_eth_txq_stop(q); | |
960 | return NETDEV_TX_BUSY; | |
961 | } | |
962 | ||
963 | pos = &q->q.desc[q->q.pidx]; | |
964 | wr = pos; | |
965 | ||
966 | /* Firmware work request header */ | |
967 | wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) | | |
968 | FW_WR_IMMDLEN_V(ctrl)); | |
969 | ||
970 | wr->equiq_to_len16 = htonl(FW_WR_LEN16_V(len16)); | |
971 | wr->r3 = 0; | |
972 | ||
973 | cpl = (void *)(wr + 1); | |
974 | ||
975 | /* CPL header */ | |
976 | cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) | TXPKT_INTF_V(tx_chan) | | |
977 | TXPKT_PF_V(tx_info->adap->pf)); | |
978 | cpl->pack = 0; | |
979 | cpl->len = htons(pktlen); | |
980 | /* checksum offload */ | |
981 | cpl->ctrl1 = 0; | |
982 | ||
983 | pos = cpl + 1; | |
984 | ||
985 | memcpy(buf, skb->data, pktlen); | |
986 | if (tx_info->ip_family == AF_INET) { | |
987 | /* we need to correct ip header len */ | |
988 | ip = (struct iphdr *)(buf + maclen); | |
989 | ip->tot_len = htons(pktlen - maclen); | |
990 | } else { | |
991 | ip6 = (struct ipv6hdr *)(buf + maclen); | |
e14394e6 | 992 | ip6->payload_len = htons(pktlen - maclen - iplen); |
429765a1 RM |
993 | } |
994 | /* now take care of the tcp header, if fin is not set then clear push | |
995 | * bit as well, and if fin is set, it will be sent at the last so we | |
996 | * need to update the tcp sequence number as per the last packet. | |
997 | */ | |
998 | tcp = (struct tcphdr *)(buf + maclen + iplen); | |
999 | ||
1000 | if (!tcp->fin) | |
1001 | tcp->psh = 0; | |
1002 | else | |
1003 | tcp->seq = htonl(tx_info->prev_seq); | |
1004 | ||
1005 | chcr_copy_to_txd(buf, &q->q, pos, pktlen); | |
1006 | ||
1007 | chcr_txq_advance(&q->q, ndesc); | |
1008 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | /* chcr_ktls_skb_shift - Shifts request length paged data from skb to another. | |
1013 | * @tgt- buffer into which tail data gets added | |
1014 | * @skb- buffer from which the paged data comes from | |
1015 | * @shiftlen- shift up to this many bytes | |
1016 | */ | |
1017 | static int chcr_ktls_skb_shift(struct sk_buff *tgt, struct sk_buff *skb, | |
1018 | int shiftlen) | |
1019 | { | |
1020 | skb_frag_t *fragfrom, *fragto; | |
1021 | int from, to, todo; | |
1022 | ||
1023 | WARN_ON(shiftlen > skb->data_len); | |
1024 | ||
1025 | todo = shiftlen; | |
1026 | from = 0; | |
1027 | to = 0; | |
1028 | fragfrom = &skb_shinfo(skb)->frags[from]; | |
1029 | ||
1030 | while ((todo > 0) && (from < skb_shinfo(skb)->nr_frags)) { | |
1031 | fragfrom = &skb_shinfo(skb)->frags[from]; | |
1032 | fragto = &skb_shinfo(tgt)->frags[to]; | |
1033 | ||
1034 | if (todo >= skb_frag_size(fragfrom)) { | |
1035 | *fragto = *fragfrom; | |
1036 | todo -= skb_frag_size(fragfrom); | |
1037 | from++; | |
1038 | to++; | |
1039 | ||
1040 | } else { | |
1041 | __skb_frag_ref(fragfrom); | |
1042 | skb_frag_page_copy(fragto, fragfrom); | |
1043 | skb_frag_off_copy(fragto, fragfrom); | |
1044 | skb_frag_size_set(fragto, todo); | |
1045 | ||
1046 | skb_frag_off_add(fragfrom, todo); | |
1047 | skb_frag_size_sub(fragfrom, todo); | |
1048 | todo = 0; | |
1049 | ||
1050 | to++; | |
1051 | break; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | /* Ready to "commit" this state change to tgt */ | |
1056 | skb_shinfo(tgt)->nr_frags = to; | |
1057 | ||
1058 | /* Reposition in the original skb */ | |
1059 | to = 0; | |
1060 | while (from < skb_shinfo(skb)->nr_frags) | |
1061 | skb_shinfo(skb)->frags[to++] = skb_shinfo(skb)->frags[from++]; | |
1062 | ||
1063 | skb_shinfo(skb)->nr_frags = to; | |
1064 | ||
1065 | WARN_ON(todo > 0 && !skb_shinfo(skb)->nr_frags); | |
1066 | ||
1067 | skb->len -= shiftlen; | |
1068 | skb->data_len -= shiftlen; | |
1069 | skb->truesize -= shiftlen; | |
1070 | tgt->len += shiftlen; | |
1071 | tgt->data_len += shiftlen; | |
1072 | tgt->truesize += shiftlen; | |
1073 | ||
1074 | return shiftlen; | |
1075 | } | |
1076 | ||
5a4b9fe7 RM |
1077 | /* |
1078 | * chcr_ktls_xmit_wr_complete: This sends out the complete record. If an skb | |
1079 | * received has partial end part of the record, send out the complete record, so | |
1080 | * that crypto block will be able to generate TAG/HASH. | |
1081 | * @skb - segment which has complete or partial end part. | |
1082 | * @tx_info - driver specific tls info. | |
1083 | * @q - TX queue. | |
1084 | * @tcp_seq | |
1085 | * @tcp_push - tcp push bit. | |
1086 | * @mss - segment size. | |
1087 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1088 | */ | |
1089 | static int chcr_ktls_xmit_wr_complete(struct sk_buff *skb, | |
1090 | struct chcr_ktls_info *tx_info, | |
1091 | struct sge_eth_txq *q, u32 tcp_seq, | |
1092 | bool tcp_push, u32 mss) | |
1093 | { | |
1094 | u32 len16, wr_mid = 0, flits = 0, ndesc, cipher_start; | |
1095 | struct adapter *adap = tx_info->adap; | |
1096 | int credits, left, last_desc; | |
1097 | struct tx_sw_desc *sgl_sdesc; | |
1098 | struct cpl_tx_data *tx_data; | |
1099 | struct cpl_tx_sec_pdu *cpl; | |
1100 | struct ulptx_idata *idata; | |
1101 | struct ulp_txpkt *ulptx; | |
1102 | struct fw_ulptx_wr *wr; | |
1103 | void *pos; | |
1104 | u64 *end; | |
1105 | ||
1106 | /* get the number of flits required */ | |
1107 | flits = chcr_ktls_get_tx_flits(skb, tx_info->key_ctx_len); | |
1108 | /* number of descriptors */ | |
1109 | ndesc = chcr_flits_to_desc(flits); | |
1110 | /* check if enough credits available */ | |
1111 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1112 | if (unlikely(credits < 0)) { | |
1113 | chcr_eth_txq_stop(q); | |
1114 | return NETDEV_TX_BUSY; | |
1115 | } | |
1116 | ||
1117 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1118 | /* Credits are below the threshold vaues, stop the queue after | |
1119 | * injecting the Work Request for this packet. | |
1120 | */ | |
1121 | chcr_eth_txq_stop(q); | |
1122 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1123 | } | |
1124 | ||
1125 | last_desc = q->q.pidx + ndesc - 1; | |
1126 | if (last_desc >= q->q.size) | |
1127 | last_desc -= q->q.size; | |
1128 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1129 | ||
1130 | if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) { | |
1131 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1132 | q->mapping_err++; | |
1133 | return NETDEV_TX_BUSY; | |
1134 | } | |
1135 | ||
1136 | pos = &q->q.desc[q->q.pidx]; | |
1137 | end = (u64 *)pos + flits; | |
1138 | /* FW_ULPTX_WR */ | |
1139 | wr = pos; | |
1140 | /* WR will need len16 */ | |
1141 | len16 = DIV_ROUND_UP(flits, 2); | |
1142 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1143 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1144 | wr->cookie = 0; | |
1145 | pos += sizeof(*wr); | |
1146 | /* ULP_TXPKT */ | |
1147 | ulptx = pos; | |
1148 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1149 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1150 | ULP_TXPKT_FID_V(q->q.cntxt_id) | | |
1151 | ULP_TXPKT_RO_F); | |
1152 | ulptx->len = htonl(len16 - 1); | |
1153 | /* ULPTX_IDATA sub-command */ | |
1154 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1155 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1156 | /* idata length will include cpl_tx_sec_pdu + key context size + | |
1157 | * cpl_tx_data header. | |
1158 | */ | |
1159 | idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len + | |
1160 | sizeof(*tx_data)); | |
1161 | /* SEC CPL */ | |
1162 | cpl = (struct cpl_tx_sec_pdu *)(idata + 1); | |
1163 | cpl->op_ivinsrtofst = | |
1164 | htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | | |
1165 | CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) | | |
1166 | CPL_TX_SEC_PDU_PLACEHOLDER_V(1) | | |
1167 | CPL_TX_SEC_PDU_IVINSRTOFST_V(TLS_HEADER_SIZE + 1)); | |
1168 | cpl->pldlen = htonl(skb->data_len); | |
1169 | ||
1170 | /* encryption should start after tls header size + iv size */ | |
1171 | cipher_start = TLS_HEADER_SIZE + tx_info->iv_size + 1; | |
1172 | ||
1173 | cpl->aadstart_cipherstop_hi = | |
1174 | htonl(CPL_TX_SEC_PDU_AADSTART_V(1) | | |
1175 | CPL_TX_SEC_PDU_AADSTOP_V(TLS_HEADER_SIZE) | | |
1176 | CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start)); | |
1177 | ||
1178 | /* authentication will also start after tls header + iv size */ | |
1179 | cpl->cipherstop_lo_authinsert = | |
1180 | htonl(CPL_TX_SEC_PDU_AUTHSTART_V(cipher_start) | | |
1181 | CPL_TX_SEC_PDU_AUTHSTOP_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE) | | |
1182 | CPL_TX_SEC_PDU_AUTHINSERT_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE)); | |
1183 | ||
1184 | /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */ | |
1185 | cpl->seqno_numivs = htonl(tx_info->scmd0_seqno_numivs); | |
1186 | cpl->ivgen_hdrlen = htonl(tx_info->scmd0_ivgen_hdrlen); | |
1187 | cpl->scmd1 = cpu_to_be64(tx_info->record_no); | |
1188 | ||
1189 | pos = cpl + 1; | |
1190 | /* check if space left to fill the keys */ | |
1191 | left = (void *)q->q.stat - pos; | |
1192 | if (!left) { | |
1193 | left = (void *)end - (void *)q->q.stat; | |
1194 | pos = q->q.desc; | |
1195 | end = pos + left; | |
1196 | } | |
1197 | ||
1198 | pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos, | |
1199 | tx_info->key_ctx_len); | |
1200 | left = (void *)q->q.stat - pos; | |
1201 | ||
1202 | if (!left) { | |
1203 | left = (void *)end - (void *)q->q.stat; | |
1204 | pos = q->q.desc; | |
1205 | end = pos + left; | |
1206 | } | |
1207 | /* CPL_TX_DATA */ | |
1208 | tx_data = (void *)pos; | |
1209 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1210 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | TX_LENGTH_V(skb->data_len)); | |
1211 | ||
1212 | tx_data->rsvd = htonl(tcp_seq); | |
1213 | ||
1214 | tx_data->flags = htonl(TX_BYPASS_F); | |
1215 | if (tcp_push) | |
1216 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1217 | ||
1218 | /* check left again, it might go beyond queue limit */ | |
1219 | pos = tx_data + 1; | |
1220 | left = (void *)q->q.stat - pos; | |
1221 | ||
1222 | /* check the position again */ | |
1223 | if (!left) { | |
1224 | left = (void *)end - (void *)q->q.stat; | |
1225 | pos = q->q.desc; | |
1226 | end = pos + left; | |
1227 | } | |
1228 | ||
1229 | /* send the complete packet except the header */ | |
1230 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1231 | sgl_sdesc->addr); | |
1232 | sgl_sdesc->skb = skb; | |
1233 | ||
1234 | chcr_txq_advance(&q->q, ndesc); | |
1235 | cxgb4_ring_tx_db(adap, &q->q, ndesc); | |
62370a4f | 1236 | atomic64_inc(&adap->chcr_stats.ktls_tx_send_records); |
5a4b9fe7 RM |
1237 | |
1238 | return 0; | |
1239 | } | |
1240 | ||
dc05f3df RM |
1241 | /* |
1242 | * chcr_ktls_xmit_wr_short: This is to send out partial records. If its | |
1243 | * a middle part of a record, fetch the prior data to make it 16 byte aligned | |
1244 | * and then only send it out. | |
1245 | * | |
1246 | * @skb - skb contains partial record.. | |
1247 | * @tx_info - driver specific tls info. | |
1248 | * @q - TX queue. | |
1249 | * @tcp_seq | |
1250 | * @tcp_push - tcp push bit. | |
1251 | * @mss - segment size. | |
1252 | * @tls_rec_offset - offset from start of the tls record. | |
1253 | * @perior_data - data before the current segment, required to make this record | |
1254 | * 16 byte aligned. | |
1255 | * @prior_data_len - prior_data length (less than 16) | |
1256 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1257 | */ | |
1258 | static int chcr_ktls_xmit_wr_short(struct sk_buff *skb, | |
1259 | struct chcr_ktls_info *tx_info, | |
1260 | struct sge_eth_txq *q, | |
1261 | u32 tcp_seq, bool tcp_push, u32 mss, | |
1262 | u32 tls_rec_offset, u8 *prior_data, | |
1263 | u32 prior_data_len) | |
1264 | { | |
1265 | struct adapter *adap = tx_info->adap; | |
1266 | u32 len16, wr_mid = 0, cipher_start; | |
1267 | unsigned int flits = 0, ndesc; | |
1268 | int credits, left, last_desc; | |
1269 | struct tx_sw_desc *sgl_sdesc; | |
1270 | struct cpl_tx_data *tx_data; | |
1271 | struct cpl_tx_sec_pdu *cpl; | |
1272 | struct ulptx_idata *idata; | |
1273 | struct ulp_txpkt *ulptx; | |
1274 | struct fw_ulptx_wr *wr; | |
1275 | __be64 iv_record; | |
1276 | void *pos; | |
1277 | u64 *end; | |
1278 | ||
1279 | /* get the number of flits required, it's a partial record so 2 flits | |
1280 | * (AES_BLOCK_SIZE) will be added. | |
1281 | */ | |
1282 | flits = chcr_ktls_get_tx_flits(skb, tx_info->key_ctx_len) + 2; | |
1283 | /* get the correct 8 byte IV of this record */ | |
1284 | iv_record = cpu_to_be64(tx_info->iv + tx_info->record_no); | |
1285 | /* If it's a middle record and not 16 byte aligned to run AES CTR, need | |
1286 | * to make it 16 byte aligned. So atleadt 2 extra flits of immediate | |
1287 | * data will be added. | |
1288 | */ | |
1289 | if (prior_data_len) | |
1290 | flits += 2; | |
1291 | /* number of descriptors */ | |
1292 | ndesc = chcr_flits_to_desc(flits); | |
1293 | /* check if enough credits available */ | |
1294 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1295 | if (unlikely(credits < 0)) { | |
1296 | chcr_eth_txq_stop(q); | |
1297 | return NETDEV_TX_BUSY; | |
1298 | } | |
1299 | ||
1300 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1301 | chcr_eth_txq_stop(q); | |
1302 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1303 | } | |
1304 | ||
1305 | last_desc = q->q.pidx + ndesc - 1; | |
1306 | if (last_desc >= q->q.size) | |
1307 | last_desc -= q->q.size; | |
1308 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1309 | ||
1310 | if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) { | |
1311 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1312 | q->mapping_err++; | |
1313 | return NETDEV_TX_BUSY; | |
1314 | } | |
1315 | ||
1316 | pos = &q->q.desc[q->q.pidx]; | |
1317 | end = (u64 *)pos + flits; | |
1318 | /* FW_ULPTX_WR */ | |
1319 | wr = pos; | |
1320 | /* WR will need len16 */ | |
1321 | len16 = DIV_ROUND_UP(flits, 2); | |
1322 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1323 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1324 | wr->cookie = 0; | |
1325 | pos += sizeof(*wr); | |
1326 | /* ULP_TXPKT */ | |
1327 | ulptx = pos; | |
1328 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1329 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1330 | ULP_TXPKT_FID_V(q->q.cntxt_id) | | |
1331 | ULP_TXPKT_RO_F); | |
1332 | ulptx->len = htonl(len16 - 1); | |
1333 | /* ULPTX_IDATA sub-command */ | |
1334 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1335 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1336 | /* idata length will include cpl_tx_sec_pdu + key context size + | |
1337 | * cpl_tx_data header. | |
1338 | */ | |
1339 | idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len + | |
1340 | sizeof(*tx_data) + AES_BLOCK_LEN + prior_data_len); | |
1341 | /* SEC CPL */ | |
1342 | cpl = (struct cpl_tx_sec_pdu *)(idata + 1); | |
1343 | /* cipher start will have tls header + iv size extra if its a header | |
1344 | * part of tls record. else only 16 byte IV will be added. | |
1345 | */ | |
1346 | cipher_start = | |
1347 | AES_BLOCK_LEN + 1 + | |
1348 | (!tls_rec_offset ? TLS_HEADER_SIZE + tx_info->iv_size : 0); | |
1349 | ||
1350 | cpl->op_ivinsrtofst = | |
1351 | htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | | |
1352 | CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) | | |
1353 | CPL_TX_SEC_PDU_IVINSRTOFST_V(1)); | |
1354 | cpl->pldlen = htonl(skb->data_len + AES_BLOCK_LEN + prior_data_len); | |
1355 | cpl->aadstart_cipherstop_hi = | |
1356 | htonl(CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start)); | |
1357 | cpl->cipherstop_lo_authinsert = 0; | |
1358 | /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */ | |
1359 | cpl->seqno_numivs = htonl(tx_info->scmd0_short_seqno_numivs); | |
1360 | cpl->ivgen_hdrlen = htonl(tx_info->scmd0_short_ivgen_hdrlen); | |
1361 | cpl->scmd1 = 0; | |
1362 | ||
1363 | pos = cpl + 1; | |
1364 | /* check if space left to fill the keys */ | |
1365 | left = (void *)q->q.stat - pos; | |
1366 | if (!left) { | |
1367 | left = (void *)end - (void *)q->q.stat; | |
1368 | pos = q->q.desc; | |
1369 | end = pos + left; | |
1370 | } | |
1371 | ||
1372 | pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos, | |
1373 | tx_info->key_ctx_len); | |
1374 | left = (void *)q->q.stat - pos; | |
1375 | ||
1376 | if (!left) { | |
1377 | left = (void *)end - (void *)q->q.stat; | |
1378 | pos = q->q.desc; | |
1379 | end = pos + left; | |
1380 | } | |
1381 | /* CPL_TX_DATA */ | |
1382 | tx_data = (void *)pos; | |
1383 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1384 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | | |
1385 | TX_LENGTH_V(skb->data_len + prior_data_len)); | |
1386 | tx_data->rsvd = htonl(tcp_seq); | |
1387 | tx_data->flags = htonl(TX_BYPASS_F); | |
1388 | if (tcp_push) | |
1389 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1390 | ||
1391 | /* check left again, it might go beyond queue limit */ | |
1392 | pos = tx_data + 1; | |
1393 | left = (void *)q->q.stat - pos; | |
1394 | ||
1395 | /* check the position again */ | |
1396 | if (!left) { | |
1397 | left = (void *)end - (void *)q->q.stat; | |
1398 | pos = q->q.desc; | |
1399 | end = pos + left; | |
1400 | } | |
1401 | /* copy the 16 byte IV for AES-CTR, which includes 4 bytes of salt, 8 | |
1402 | * bytes of actual IV and 4 bytes of 16 byte-sequence. | |
1403 | */ | |
1404 | memcpy(pos, tx_info->key_ctx.salt, tx_info->salt_size); | |
1405 | memcpy(pos + tx_info->salt_size, &iv_record, tx_info->iv_size); | |
1406 | *(__be32 *)(pos + tx_info->salt_size + tx_info->iv_size) = | |
1407 | htonl(2 + (tls_rec_offset ? ((tls_rec_offset - | |
1408 | (TLS_HEADER_SIZE + tx_info->iv_size)) / AES_BLOCK_LEN) : 0)); | |
1409 | ||
1410 | pos += 16; | |
1411 | /* Prior_data_len will always be less than 16 bytes, fill the | |
1412 | * prio_data_len after AES_CTRL_BLOCK and clear the remaining length | |
1413 | * to 0. | |
1414 | */ | |
1415 | if (prior_data_len) | |
1416 | pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16); | |
1417 | /* send the complete packet except the header */ | |
1418 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1419 | sgl_sdesc->addr); | |
1420 | sgl_sdesc->skb = skb; | |
1421 | ||
1422 | chcr_txq_advance(&q->q, ndesc); | |
1423 | cxgb4_ring_tx_db(adap, &q->q, ndesc); | |
1424 | ||
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * chcr_ktls_tx_plaintxt: This handler will take care of the records which has | |
1430 | * only plain text (only tls header and iv) | |
1431 | * @tx_info - driver specific tls info. | |
1432 | * @skb - skb contains partial record.. | |
1433 | * @tcp_seq | |
1434 | * @mss - segment size. | |
1435 | * @tcp_push - tcp push bit. | |
1436 | * @q - TX queue. | |
1437 | * @port_id : port number | |
1438 | * @perior_data - data before the current segment, required to make this record | |
1439 | * 16 byte aligned. | |
1440 | * @prior_data_len - prior_data length (less than 16) | |
1441 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1442 | */ | |
1443 | static int chcr_ktls_tx_plaintxt(struct chcr_ktls_info *tx_info, | |
1444 | struct sk_buff *skb, u32 tcp_seq, u32 mss, | |
1445 | bool tcp_push, struct sge_eth_txq *q, | |
1446 | u32 port_id, u8 *prior_data, | |
1447 | u32 prior_data_len) | |
1448 | { | |
1449 | int credits, left, len16, last_desc; | |
1450 | unsigned int flits = 0, ndesc; | |
1451 | struct tx_sw_desc *sgl_sdesc; | |
1452 | struct cpl_tx_data *tx_data; | |
1453 | struct ulptx_idata *idata; | |
1454 | struct ulp_txpkt *ulptx; | |
1455 | struct fw_ulptx_wr *wr; | |
1456 | u32 wr_mid = 0; | |
1457 | void *pos; | |
1458 | u64 *end; | |
1459 | ||
1460 | flits = DIV_ROUND_UP(CHCR_PLAIN_TX_DATA_LEN, 8); | |
1461 | flits += chcr_sgl_len(skb_shinfo(skb)->nr_frags); | |
1462 | if (prior_data_len) | |
1463 | flits += 2; | |
1464 | /* WR will need len16 */ | |
1465 | len16 = DIV_ROUND_UP(flits, 2); | |
1466 | /* check how many descriptors needed */ | |
1467 | ndesc = DIV_ROUND_UP(flits, 8); | |
1468 | ||
1469 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1470 | if (unlikely(credits < 0)) { | |
1471 | chcr_eth_txq_stop(q); | |
1472 | return NETDEV_TX_BUSY; | |
1473 | } | |
1474 | ||
1475 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1476 | chcr_eth_txq_stop(q); | |
1477 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1478 | } | |
1479 | ||
1480 | last_desc = q->q.pidx + ndesc - 1; | |
1481 | if (last_desc >= q->q.size) | |
1482 | last_desc -= q->q.size; | |
1483 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1484 | ||
1485 | if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb, | |
1486 | sgl_sdesc->addr) < 0)) { | |
1487 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1488 | q->mapping_err++; | |
1489 | return NETDEV_TX_BUSY; | |
1490 | } | |
1491 | ||
1492 | pos = &q->q.desc[q->q.pidx]; | |
1493 | end = (u64 *)pos + flits; | |
1494 | /* FW_ULPTX_WR */ | |
1495 | wr = pos; | |
1496 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1497 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1498 | wr->cookie = 0; | |
1499 | pos += sizeof(*wr); | |
1500 | /* ULP_TXPKT */ | |
1501 | ulptx = (struct ulp_txpkt *)(wr + 1); | |
1502 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1503 | ULP_TXPKT_DATAMODIFY_V(0) | | |
1504 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1505 | ULP_TXPKT_DEST_V(0) | | |
1506 | ULP_TXPKT_FID_V(q->q.cntxt_id) | ULP_TXPKT_RO_V(1)); | |
1507 | ulptx->len = htonl(len16 - 1); | |
1508 | /* ULPTX_IDATA sub-command */ | |
1509 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1510 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1511 | idata->len = htonl(sizeof(*tx_data) + prior_data_len); | |
1512 | /* CPL_TX_DATA */ | |
1513 | tx_data = (struct cpl_tx_data *)(idata + 1); | |
1514 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1515 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | | |
1516 | TX_LENGTH_V(skb->data_len + prior_data_len)); | |
1517 | /* set tcp seq number */ | |
1518 | tx_data->rsvd = htonl(tcp_seq); | |
1519 | tx_data->flags = htonl(TX_BYPASS_F); | |
1520 | if (tcp_push) | |
1521 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1522 | ||
1523 | pos = tx_data + 1; | |
1524 | /* apart from prior_data_len, we should set remaining part of 16 bytes | |
1525 | * to be zero. | |
1526 | */ | |
1527 | if (prior_data_len) | |
1528 | pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16); | |
1529 | ||
1530 | /* check left again, it might go beyond queue limit */ | |
1531 | left = (void *)q->q.stat - pos; | |
1532 | ||
1533 | /* check the position again */ | |
1534 | if (!left) { | |
1535 | left = (void *)end - (void *)q->q.stat; | |
1536 | pos = q->q.desc; | |
1537 | end = pos + left; | |
1538 | } | |
1539 | /* send the complete packet including the header */ | |
1540 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1541 | sgl_sdesc->addr); | |
1542 | sgl_sdesc->skb = skb; | |
1543 | ||
1544 | chcr_txq_advance(&q->q, ndesc); | |
1545 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
1546 | return 0; | |
1547 | } | |
1548 | ||
429765a1 RM |
1549 | /* |
1550 | * chcr_ktls_copy_record_in_skb | |
1551 | * @nskb - new skb where the frags to be added. | |
1552 | * @record - specific record which has complete 16k record in frags. | |
1553 | */ | |
1554 | static void chcr_ktls_copy_record_in_skb(struct sk_buff *nskb, | |
1555 | struct tls_record_info *record) | |
1556 | { | |
1557 | int i = 0; | |
1558 | ||
1559 | for (i = 0; i < record->num_frags; i++) { | |
1560 | skb_shinfo(nskb)->frags[i] = record->frags[i]; | |
1561 | /* increase the frag ref count */ | |
1562 | __skb_frag_ref(&skb_shinfo(nskb)->frags[i]); | |
1563 | } | |
1564 | ||
1565 | skb_shinfo(nskb)->nr_frags = record->num_frags; | |
1566 | nskb->data_len = record->len; | |
1567 | nskb->len += record->len; | |
1568 | nskb->truesize += record->len; | |
1569 | } | |
1570 | ||
1571 | /* | |
1572 | * chcr_ktls_update_snd_una: Reset the SEND_UNA. It will be done to avoid | |
1573 | * sending the same segment again. It will discard the segment which is before | |
1574 | * the current tx max. | |
1575 | * @tx_info - driver specific tls info. | |
1576 | * @q - TX queue. | |
1577 | * return: NET_TX_OK/NET_XMIT_DROP. | |
1578 | */ | |
1579 | static int chcr_ktls_update_snd_una(struct chcr_ktls_info *tx_info, | |
1580 | struct sge_eth_txq *q) | |
1581 | { | |
1582 | struct fw_ulptx_wr *wr; | |
1583 | unsigned int ndesc; | |
1584 | int credits; | |
1585 | void *pos; | |
1586 | u32 len; | |
1587 | ||
1588 | len = sizeof(*wr) + roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
1589 | ndesc = DIV_ROUND_UP(len, 64); | |
1590 | ||
1591 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1592 | if (unlikely(credits < 0)) { | |
1593 | chcr_eth_txq_stop(q); | |
1594 | return NETDEV_TX_BUSY; | |
1595 | } | |
1596 | ||
1597 | pos = &q->q.desc[q->q.pidx]; | |
1598 | ||
1599 | wr = pos; | |
1600 | /* ULPTX wr */ | |
1601 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1602 | wr->cookie = 0; | |
1603 | /* fill len in wr field */ | |
1604 | wr->flowid_len16 = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(len, 16))); | |
1605 | ||
1606 | pos += sizeof(*wr); | |
1607 | ||
1608 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
1609 | TCB_SND_UNA_RAW_W, | |
1610 | TCB_SND_UNA_RAW_V(TCB_SND_UNA_RAW_M), | |
1611 | TCB_SND_UNA_RAW_V(0), 0); | |
1612 | ||
1613 | chcr_txq_advance(&q->q, ndesc); | |
1614 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
1615 | ||
1616 | return 0; | |
1617 | } | |
1618 | ||
5a4b9fe7 RM |
1619 | /* |
1620 | * chcr_end_part_handler: This handler will handle the record which | |
1621 | * is complete or if record's end part is received. T6 adapter has a issue that | |
1622 | * it can't send out TAG with partial record so if its an end part then we have | |
1623 | * to send TAG as well and for which we need to fetch the complete record and | |
1624 | * send it to crypto module. | |
1625 | * @tx_info - driver specific tls info. | |
1626 | * @skb - skb contains partial record. | |
1627 | * @record - complete record of 16K size. | |
1628 | * @tcp_seq | |
1629 | * @mss - segment size in which TP needs to chop a packet. | |
1630 | * @tcp_push_no_fin - tcp push if fin is not set. | |
1631 | * @q - TX queue. | |
1632 | * @tls_end_offset - offset from end of the record. | |
1633 | * @last wr : check if this is the last part of the skb going out. | |
1634 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
1635 | */ | |
1636 | static int chcr_end_part_handler(struct chcr_ktls_info *tx_info, | |
1637 | struct sk_buff *skb, | |
1638 | struct tls_record_info *record, | |
1639 | u32 tcp_seq, int mss, bool tcp_push_no_fin, | |
1640 | struct sge_eth_txq *q, | |
1641 | u32 tls_end_offset, bool last_wr) | |
1642 | { | |
1643 | struct sk_buff *nskb = NULL; | |
1644 | /* check if it is a complete record */ | |
1645 | if (tls_end_offset == record->len) { | |
1646 | nskb = skb; | |
62370a4f | 1647 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_complete_pkts); |
5a4b9fe7 | 1648 | } else { |
429765a1 RM |
1649 | dev_kfree_skb_any(skb); |
1650 | ||
1651 | nskb = alloc_skb(0, GFP_KERNEL); | |
1652 | if (!nskb) | |
1653 | return NETDEV_TX_BUSY; | |
1654 | /* copy complete record in skb */ | |
1655 | chcr_ktls_copy_record_in_skb(nskb, record); | |
1656 | /* packet is being sent from the beginning, update the tcp_seq | |
1657 | * accordingly. | |
1658 | */ | |
1659 | tcp_seq = tls_record_start_seq(record); | |
1660 | /* reset snd una, so the middle record won't send the already | |
1661 | * sent part. | |
1662 | */ | |
1663 | if (chcr_ktls_update_snd_una(tx_info, q)) | |
1664 | goto out; | |
62370a4f | 1665 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_end_pkts); |
5a4b9fe7 RM |
1666 | } |
1667 | ||
1668 | if (chcr_ktls_xmit_wr_complete(nskb, tx_info, q, tcp_seq, | |
1669 | (last_wr && tcp_push_no_fin), | |
1670 | mss)) { | |
1671 | goto out; | |
1672 | } | |
1673 | return 0; | |
1674 | out: | |
429765a1 | 1675 | dev_kfree_skb_any(nskb); |
5a4b9fe7 RM |
1676 | return NETDEV_TX_BUSY; |
1677 | } | |
1678 | ||
dc05f3df RM |
1679 | /* |
1680 | * chcr_short_record_handler: This handler will take care of the records which | |
1681 | * doesn't have end part (1st part or the middle part(/s) of a record). In such | |
1682 | * cases, AES CTR will be used in place of AES GCM to send out partial packet. | |
1683 | * This partial record might be the first part of the record, or the middle | |
1684 | * part. In case of middle record we should fetch the prior data to make it 16 | |
1685 | * byte aligned. If it has a partial tls header or iv then get to the start of | |
1686 | * tls header. And if it has partial TAG, then remove the complete TAG and send | |
1687 | * only the payload. | |
1688 | * There is one more possibility that it gets a partial header, send that | |
1689 | * portion as a plaintext. | |
1690 | * @tx_info - driver specific tls info. | |
1691 | * @skb - skb contains partial record.. | |
1692 | * @record - complete record of 16K size. | |
1693 | * @tcp_seq | |
1694 | * @mss - segment size in which TP needs to chop a packet. | |
1695 | * @tcp_push_no_fin - tcp push if fin is not set. | |
1696 | * @q - TX queue. | |
1697 | * @tls_end_offset - offset from end of the record. | |
1698 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
1699 | */ | |
1700 | static int chcr_short_record_handler(struct chcr_ktls_info *tx_info, | |
1701 | struct sk_buff *skb, | |
1702 | struct tls_record_info *record, | |
1703 | u32 tcp_seq, int mss, bool tcp_push_no_fin, | |
1704 | struct sge_eth_txq *q, u32 tls_end_offset) | |
1705 | { | |
1706 | u32 tls_rec_offset = tcp_seq - tls_record_start_seq(record); | |
1707 | u8 prior_data[16] = {0}; | |
1708 | u32 prior_data_len = 0; | |
1709 | u32 data_len; | |
1710 | ||
1711 | /* check if the skb is ending in middle of tag/HASH, its a big | |
1712 | * trouble, send the packet before the HASH. | |
1713 | */ | |
1714 | int remaining_record = tls_end_offset - skb->data_len; | |
1715 | ||
1716 | if (remaining_record > 0 && | |
1717 | remaining_record < TLS_CIPHER_AES_GCM_128_TAG_SIZE) { | |
1718 | int trimmed_len = skb->data_len - | |
1719 | (TLS_CIPHER_AES_GCM_128_TAG_SIZE - remaining_record); | |
1720 | struct sk_buff *tmp_skb = NULL; | |
1721 | /* don't process the pkt if it is only a partial tag */ | |
1722 | if (skb->data_len < TLS_CIPHER_AES_GCM_128_TAG_SIZE) | |
1723 | goto out; | |
1724 | ||
1725 | WARN_ON(trimmed_len > skb->data_len); | |
1726 | ||
1727 | /* shift to those many bytes */ | |
1728 | tmp_skb = alloc_skb(0, GFP_KERNEL); | |
1729 | if (unlikely(!tmp_skb)) | |
1730 | goto out; | |
1731 | ||
1732 | chcr_ktls_skb_shift(tmp_skb, skb, trimmed_len); | |
1733 | /* free the last trimmed portion */ | |
1734 | dev_kfree_skb_any(skb); | |
1735 | skb = tmp_skb; | |
62370a4f | 1736 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_trimmed_pkts); |
dc05f3df RM |
1737 | } |
1738 | data_len = skb->data_len; | |
1739 | /* check if the middle record's start point is 16 byte aligned. CTR | |
1740 | * needs 16 byte aligned start point to start encryption. | |
1741 | */ | |
1742 | if (tls_rec_offset) { | |
1743 | /* there is an offset from start, means its a middle record */ | |
1744 | int remaining = 0; | |
1745 | ||
1746 | if (tls_rec_offset < (TLS_HEADER_SIZE + tx_info->iv_size)) { | |
1747 | prior_data_len = tls_rec_offset; | |
1748 | tls_rec_offset = 0; | |
1749 | remaining = 0; | |
1750 | } else { | |
1751 | prior_data_len = | |
1752 | (tls_rec_offset - | |
1753 | (TLS_HEADER_SIZE + tx_info->iv_size)) | |
1754 | % AES_BLOCK_LEN; | |
1755 | remaining = tls_rec_offset - prior_data_len; | |
1756 | } | |
1757 | ||
1758 | /* if prior_data_len is not zero, means we need to fetch prior | |
1759 | * data to make this record 16 byte aligned, or we need to reach | |
1760 | * to start offset. | |
1761 | */ | |
1762 | if (prior_data_len) { | |
1763 | int i = 0; | |
1764 | u8 *data = NULL; | |
1765 | skb_frag_t *f; | |
1766 | u8 *vaddr; | |
1767 | int frag_size = 0, frag_delta = 0; | |
1768 | ||
1769 | while (remaining > 0) { | |
1770 | frag_size = skb_frag_size(&record->frags[i]); | |
1771 | if (remaining < frag_size) | |
1772 | break; | |
1773 | ||
1774 | remaining -= frag_size; | |
1775 | i++; | |
1776 | } | |
1777 | f = &record->frags[i]; | |
1778 | vaddr = kmap_atomic(skb_frag_page(f)); | |
1779 | ||
1780 | data = vaddr + skb_frag_off(f) + remaining; | |
1781 | frag_delta = skb_frag_size(f) - remaining; | |
1782 | ||
1783 | if (frag_delta >= prior_data_len) { | |
1784 | memcpy(prior_data, data, prior_data_len); | |
1785 | kunmap_atomic(vaddr); | |
1786 | } else { | |
1787 | memcpy(prior_data, data, frag_delta); | |
1788 | kunmap_atomic(vaddr); | |
1789 | /* get the next page */ | |
1790 | f = &record->frags[i + 1]; | |
1791 | vaddr = kmap_atomic(skb_frag_page(f)); | |
1792 | data = vaddr + skb_frag_off(f); | |
1793 | memcpy(prior_data + frag_delta, | |
1794 | data, (prior_data_len - frag_delta)); | |
1795 | kunmap_atomic(vaddr); | |
1796 | } | |
1797 | /* reset tcp_seq as per the prior_data_required len */ | |
1798 | tcp_seq -= prior_data_len; | |
1799 | /* include prio_data_len for further calculation. | |
1800 | */ | |
1801 | data_len += prior_data_len; | |
1802 | } | |
1803 | /* reset snd una, so the middle record won't send the already | |
1804 | * sent part. | |
1805 | */ | |
1806 | if (chcr_ktls_update_snd_una(tx_info, q)) | |
1807 | goto out; | |
62370a4f | 1808 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_middle_pkts); |
dc05f3df RM |
1809 | } else { |
1810 | /* Else means, its a partial first part of the record. Check if | |
1811 | * its only the header, don't need to send for encryption then. | |
1812 | */ | |
1813 | if (data_len <= TLS_HEADER_SIZE + tx_info->iv_size) { | |
1814 | if (chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss, | |
1815 | tcp_push_no_fin, q, | |
1816 | tx_info->port_id, | |
1817 | prior_data, | |
1818 | prior_data_len)) { | |
1819 | goto out; | |
1820 | } | |
1821 | return 0; | |
1822 | } | |
62370a4f | 1823 | atomic64_inc(&tx_info->adap->chcr_stats.ktls_tx_start_pkts); |
dc05f3df RM |
1824 | } |
1825 | ||
1826 | if (chcr_ktls_xmit_wr_short(skb, tx_info, q, tcp_seq, tcp_push_no_fin, | |
1827 | mss, tls_rec_offset, prior_data, | |
1828 | prior_data_len)) { | |
1829 | goto out; | |
1830 | } | |
1831 | ||
1832 | return 0; | |
1833 | out: | |
1834 | dev_kfree_skb_any(skb); | |
1835 | return NETDEV_TX_BUSY; | |
1836 | } | |
1837 | ||
5a4b9fe7 RM |
1838 | /* nic tls TX handler */ |
1839 | int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev) | |
1840 | { | |
1841 | struct chcr_ktls_ofld_ctx_tx *tx_ctx; | |
1842 | struct tcphdr *th = tcp_hdr(skb); | |
1843 | int data_len, qidx, ret = 0, mss; | |
1844 | struct tls_record_info *record; | |
62370a4f | 1845 | struct chcr_stats_debug *stats; |
5a4b9fe7 RM |
1846 | struct chcr_ktls_info *tx_info; |
1847 | u32 tls_end_offset, tcp_seq; | |
1848 | struct tls_context *tls_ctx; | |
1849 | struct sk_buff *local_skb; | |
1850 | int new_connection_state; | |
1851 | struct sge_eth_txq *q; | |
1852 | struct adapter *adap; | |
1853 | unsigned long flags; | |
1854 | ||
1855 | tcp_seq = ntohl(th->seq); | |
1856 | ||
1857 | mss = skb_is_gso(skb) ? skb_shinfo(skb)->gso_size : skb->data_len; | |
1858 | ||
1859 | /* check if we haven't set it for ktls offload */ | |
1860 | if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)) | |
1861 | goto out; | |
1862 | ||
1863 | tls_ctx = tls_get_ctx(skb->sk); | |
1864 | if (unlikely(tls_ctx->netdev != dev)) | |
1865 | goto out; | |
1866 | ||
1867 | tx_ctx = chcr_get_ktls_tx_context(tls_ctx); | |
1868 | tx_info = tx_ctx->chcr_info; | |
1869 | ||
1870 | if (unlikely(!tx_info)) | |
1871 | goto out; | |
1872 | ||
1873 | /* check the connection state, we don't need to pass new connection | |
1874 | * state, state machine will check and update the new state if it is | |
1875 | * stuck due to responses not received from HW. | |
1876 | * Start the tx handling only if state is KTLS_CONN_TX_READY. | |
1877 | */ | |
1878 | new_connection_state = chcr_ktls_update_connection_state(tx_info, 0); | |
1879 | if (new_connection_state != KTLS_CONN_TX_READY) | |
1880 | goto out; | |
1881 | ||
1882 | /* don't touch the original skb, make a new skb to extract each records | |
1883 | * and send them separately. | |
1884 | */ | |
1885 | local_skb = alloc_skb(0, GFP_KERNEL); | |
1886 | ||
1887 | if (unlikely(!local_skb)) | |
1888 | return NETDEV_TX_BUSY; | |
1889 | ||
1890 | adap = tx_info->adap; | |
62370a4f RM |
1891 | stats = &adap->chcr_stats; |
1892 | ||
5a4b9fe7 RM |
1893 | qidx = skb->queue_mapping; |
1894 | q = &adap->sge.ethtxq[qidx + tx_info->first_qset]; | |
1895 | cxgb4_reclaim_completed_tx(adap, &q->q, true); | |
429765a1 RM |
1896 | /* if tcp options are set but finish is not send the options first */ |
1897 | if (!th->fin && chcr_ktls_check_tcp_options(th)) { | |
1898 | ret = chcr_ktls_write_tcp_options(tx_info, skb, q, | |
1899 | tx_info->tx_chan); | |
1900 | if (ret) | |
1901 | return NETDEV_TX_BUSY; | |
1902 | } | |
5a4b9fe7 RM |
1903 | /* update tcb */ |
1904 | ret = chcr_ktls_xmit_tcb_cpls(tx_info, q, ntohl(th->seq), | |
1905 | ntohl(th->ack_seq), | |
1906 | ntohs(th->window)); | |
1907 | if (ret) { | |
1908 | dev_kfree_skb_any(local_skb); | |
1909 | return NETDEV_TX_BUSY; | |
1910 | } | |
1911 | ||
1912 | /* copy skb contents into local skb */ | |
1913 | chcr_ktls_skb_copy(skb, local_skb); | |
1914 | ||
1915 | /* go through the skb and send only one record at a time. */ | |
1916 | data_len = skb->data_len; | |
429765a1 | 1917 | /* TCP segments can be in received either complete or partial. |
5a4b9fe7 RM |
1918 | * chcr_end_part_handler will handle cases if complete record or end |
1919 | * part of the record is received. Incase of partial end part of record, | |
1920 | * we will send the complete record again. | |
1921 | */ | |
62370a4f | 1922 | |
5a4b9fe7 RM |
1923 | do { |
1924 | int i; | |
1925 | ||
1926 | cxgb4_reclaim_completed_tx(adap, &q->q, true); | |
1927 | /* lock taken */ | |
1928 | spin_lock_irqsave(&tx_ctx->base.lock, flags); | |
1929 | /* fetch the tls record */ | |
1930 | record = tls_get_record(&tx_ctx->base, tcp_seq, | |
1931 | &tx_info->record_no); | |
1932 | /* By the time packet reached to us, ACK is received, and record | |
1933 | * won't be found in that case, handle it gracefully. | |
1934 | */ | |
1935 | if (unlikely(!record)) { | |
1936 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
62370a4f | 1937 | atomic64_inc(&stats->ktls_tx_drop_no_sync_data); |
5a4b9fe7 RM |
1938 | goto out; |
1939 | } | |
1940 | ||
1941 | if (unlikely(tls_record_is_start_marker(record))) { | |
1942 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
62370a4f | 1943 | atomic64_inc(&stats->ktls_tx_skip_no_sync_data); |
5a4b9fe7 RM |
1944 | goto out; |
1945 | } | |
1946 | ||
1947 | /* increase page reference count of the record, so that there | |
1948 | * won't be any chance of page free in middle if in case stack | |
1949 | * receives ACK and try to delete the record. | |
1950 | */ | |
1951 | for (i = 0; i < record->num_frags; i++) | |
1952 | __skb_frag_ref(&record->frags[i]); | |
1953 | /* lock cleared */ | |
1954 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
1955 | ||
1956 | tls_end_offset = record->end_seq - tcp_seq; | |
1957 | ||
1958 | pr_debug("seq 0x%x, end_seq 0x%x prev_seq 0x%x, datalen 0x%x\n", | |
1959 | tcp_seq, record->end_seq, tx_info->prev_seq, data_len); | |
1960 | /* if a tls record is finishing in this SKB */ | |
1961 | if (tls_end_offset <= data_len) { | |
1962 | struct sk_buff *nskb = NULL; | |
1963 | ||
1964 | if (tls_end_offset < data_len) { | |
429765a1 RM |
1965 | nskb = alloc_skb(0, GFP_KERNEL); |
1966 | if (unlikely(!nskb)) { | |
1967 | ret = -ENOMEM; | |
1968 | goto clear_ref; | |
1969 | } | |
1970 | ||
1971 | chcr_ktls_skb_shift(nskb, local_skb, | |
1972 | tls_end_offset); | |
5a4b9fe7 RM |
1973 | } else { |
1974 | /* its the only record in this skb, directly | |
1975 | * point it. | |
1976 | */ | |
1977 | nskb = local_skb; | |
1978 | } | |
1979 | ret = chcr_end_part_handler(tx_info, nskb, record, | |
1980 | tcp_seq, mss, | |
1981 | (!th->fin && th->psh), q, | |
1982 | tls_end_offset, | |
1983 | (nskb == local_skb)); | |
1984 | ||
1985 | if (ret && nskb != local_skb) | |
1986 | dev_kfree_skb_any(local_skb); | |
1987 | ||
1988 | data_len -= tls_end_offset; | |
1989 | /* tcp_seq increment is required to handle next record. | |
1990 | */ | |
1991 | tcp_seq += tls_end_offset; | |
dc05f3df RM |
1992 | } else { |
1993 | ret = chcr_short_record_handler(tx_info, local_skb, | |
1994 | record, tcp_seq, mss, | |
1995 | (!th->fin && th->psh), | |
1996 | q, tls_end_offset); | |
1997 | data_len = 0; | |
5a4b9fe7 RM |
1998 | } |
1999 | clear_ref: | |
2000 | /* clear the frag ref count which increased locally before */ | |
2001 | for (i = 0; i < record->num_frags; i++) { | |
2002 | /* clear the frag ref count */ | |
2003 | __skb_frag_unref(&record->frags[i]); | |
2004 | } | |
dc05f3df | 2005 | /* if any failure, come out from the loop. */ |
5a4b9fe7 RM |
2006 | if (ret) |
2007 | goto out; | |
dc05f3df | 2008 | /* length should never be less than 0 */ |
5a4b9fe7 RM |
2009 | WARN_ON(data_len < 0); |
2010 | ||
2011 | } while (data_len > 0); | |
2012 | ||
2013 | tx_info->prev_seq = ntohl(th->seq) + skb->data_len; | |
62370a4f RM |
2014 | |
2015 | atomic64_inc(&stats->ktls_tx_encrypted_packets); | |
2016 | atomic64_add(skb->data_len, &stats->ktls_tx_encrypted_bytes); | |
2017 | ||
429765a1 RM |
2018 | /* tcp finish is set, send a separate tcp msg including all the options |
2019 | * as well. | |
2020 | */ | |
2021 | if (th->fin) | |
2022 | chcr_ktls_write_tcp_options(tx_info, skb, q, tx_info->tx_chan); | |
2023 | ||
5a4b9fe7 RM |
2024 | out: |
2025 | dev_kfree_skb_any(skb); | |
2026 | return NETDEV_TX_OK; | |
2027 | } | |
34aba2c4 | 2028 | #endif /* CONFIG_CHELSIO_TLS_DEVICE */ |