Commit | Line | Data |
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34aba2c4 RM |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* Copyright (C) 2020 Chelsio Communications. All rights reserved. */ | |
3 | ||
a8c16e8e RM |
4 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
5 | ||
6 | #include <linux/skbuff.h> | |
7 | #include <linux/module.h> | |
21f6f946 | 8 | #include <linux/highmem.h> |
a8c16e8e RM |
9 | #include <linux/ip.h> |
10 | #include <net/ipv6.h> | |
11 | #include <linux/netdevice.h> | |
34aba2c4 | 12 | #include "chcr_ktls.h" |
a8c16e8e RM |
13 | |
14 | static LIST_HEAD(uld_ctx_list); | |
15 | static DEFINE_MUTEX(dev_mutex); | |
34aba2c4 | 16 | |
8a30923e RM |
17 | static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info); |
18 | /* | |
19 | * chcr_ktls_save_keys: calculate and save crypto keys. | |
20 | * @tx_info - driver specific tls info. | |
21 | * @crypto_info - tls crypto information. | |
22 | * @direction - TX/RX direction. | |
23 | * return - SUCCESS/FAILURE. | |
24 | */ | |
25 | static int chcr_ktls_save_keys(struct chcr_ktls_info *tx_info, | |
26 | struct tls_crypto_info *crypto_info, | |
27 | enum tls_offload_ctx_dir direction) | |
28 | { | |
29 | int ck_size, key_ctx_size, mac_key_size, keylen, ghash_size, ret; | |
30 | unsigned char ghash_h[TLS_CIPHER_AES_GCM_256_TAG_SIZE]; | |
31 | struct tls12_crypto_info_aes_gcm_128 *info_128_gcm; | |
32 | struct ktls_key_ctx *kctx = &tx_info->key_ctx; | |
33 | struct crypto_cipher *cipher; | |
34 | unsigned char *key, *salt; | |
35 | ||
36 | switch (crypto_info->cipher_type) { | |
37 | case TLS_CIPHER_AES_GCM_128: | |
38 | info_128_gcm = | |
39 | (struct tls12_crypto_info_aes_gcm_128 *)crypto_info; | |
40 | keylen = TLS_CIPHER_AES_GCM_128_KEY_SIZE; | |
41 | ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; | |
42 | tx_info->salt_size = TLS_CIPHER_AES_GCM_128_SALT_SIZE; | |
43 | mac_key_size = CHCR_KEYCTX_MAC_KEY_SIZE_128; | |
44 | tx_info->iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; | |
45 | tx_info->iv = be64_to_cpu(*(__be64 *)info_128_gcm->iv); | |
46 | ||
47 | ghash_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
48 | key = info_128_gcm->key; | |
49 | salt = info_128_gcm->salt; | |
50 | tx_info->record_no = *(u64 *)info_128_gcm->rec_seq; | |
51 | ||
5a4b9fe7 RM |
52 | /* The SCMD fields used when encrypting a full TLS |
53 | * record. Its a one time calculation till the | |
54 | * connection exists. | |
55 | */ | |
56 | tx_info->scmd0_seqno_numivs = | |
57 | SCMD_SEQ_NO_CTRL_V(CHCR_SCMD_SEQ_NO_CTRL_64BIT) | | |
58 | SCMD_CIPH_AUTH_SEQ_CTRL_F | | |
59 | SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_TLS) | | |
60 | SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_GCM) | | |
61 | SCMD_AUTH_MODE_V(CHCR_SCMD_AUTH_MODE_GHASH) | | |
62 | SCMD_IV_SIZE_V(TLS_CIPHER_AES_GCM_128_IV_SIZE >> 1) | | |
63 | SCMD_NUM_IVS_V(1); | |
64 | ||
65 | /* keys will be sent inline. */ | |
66 | tx_info->scmd0_ivgen_hdrlen = SCMD_KEY_CTX_INLINE_F; | |
67 | ||
dc05f3df RM |
68 | /* The SCMD fields used when encrypting a partial TLS |
69 | * record (no trailer and possibly a truncated payload). | |
70 | */ | |
71 | tx_info->scmd0_short_seqno_numivs = | |
72 | SCMD_CIPH_AUTH_SEQ_CTRL_F | | |
73 | SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_GENERIC) | | |
74 | SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_CTR) | | |
75 | SCMD_IV_SIZE_V(AES_BLOCK_LEN >> 1); | |
76 | ||
77 | tx_info->scmd0_short_ivgen_hdrlen = | |
78 | tx_info->scmd0_ivgen_hdrlen | SCMD_AADIVDROP_F; | |
79 | ||
8a30923e RM |
80 | break; |
81 | ||
82 | default: | |
83 | pr_err("GCM: cipher type 0x%x not supported\n", | |
84 | crypto_info->cipher_type); | |
85 | ret = -EINVAL; | |
86 | goto out; | |
87 | } | |
88 | ||
89 | key_ctx_size = CHCR_KTLS_KEY_CTX_LEN + | |
90 | roundup(keylen, 16) + ghash_size; | |
91 | /* Calculate the H = CIPH(K, 0 repeated 16 times). | |
92 | * It will go in key context | |
93 | */ | |
94 | cipher = crypto_alloc_cipher("aes", 0, 0); | |
95 | if (IS_ERR(cipher)) { | |
96 | ret = -ENOMEM; | |
97 | goto out; | |
98 | } | |
99 | ||
100 | ret = crypto_cipher_setkey(cipher, key, keylen); | |
101 | if (ret) | |
102 | goto out1; | |
103 | ||
104 | memset(ghash_h, 0, ghash_size); | |
105 | crypto_cipher_encrypt_one(cipher, ghash_h, ghash_h); | |
106 | ||
107 | /* fill the Key context */ | |
108 | if (direction == TLS_OFFLOAD_CTX_DIR_TX) { | |
109 | kctx->ctx_hdr = FILL_KEY_CTX_HDR(ck_size, | |
110 | mac_key_size, | |
111 | key_ctx_size >> 4); | |
112 | } else { | |
113 | ret = -EINVAL; | |
114 | goto out1; | |
115 | } | |
116 | ||
117 | memcpy(kctx->salt, salt, tx_info->salt_size); | |
118 | memcpy(kctx->key, key, keylen); | |
119 | memcpy(kctx->key + keylen, ghash_h, ghash_size); | |
120 | tx_info->key_ctx_len = key_ctx_size; | |
121 | ||
122 | out1: | |
123 | crypto_free_cipher(cipher); | |
124 | out: | |
125 | return ret; | |
126 | } | |
127 | ||
34aba2c4 RM |
128 | /* |
129 | * chcr_ktls_act_open_req: creates TCB entry for ipv4 connection. | |
130 | * @sk - tcp socket. | |
131 | * @tx_info - driver specific tls info. | |
132 | * @atid - connection active tid. | |
133 | * return - send success/failure. | |
134 | */ | |
135 | static int chcr_ktls_act_open_req(struct sock *sk, | |
136 | struct chcr_ktls_info *tx_info, | |
137 | int atid) | |
138 | { | |
139 | struct inet_sock *inet = inet_sk(sk); | |
140 | struct cpl_t6_act_open_req *cpl6; | |
141 | struct cpl_act_open_req *cpl; | |
142 | struct sk_buff *skb; | |
143 | unsigned int len; | |
144 | int qid_atid; | |
145 | u64 options; | |
146 | ||
147 | len = sizeof(*cpl6); | |
148 | skb = alloc_skb(len, GFP_KERNEL); | |
149 | if (unlikely(!skb)) | |
150 | return -ENOMEM; | |
151 | /* mark it a control pkt */ | |
152 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); | |
153 | ||
154 | cpl6 = __skb_put_zero(skb, len); | |
155 | cpl = (struct cpl_act_open_req *)cpl6; | |
156 | INIT_TP_WR(cpl6, 0); | |
157 | qid_atid = TID_QID_V(tx_info->rx_qid) | | |
158 | TID_TID_V(atid); | |
159 | OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, qid_atid)); | |
160 | cpl->local_port = inet->inet_sport; | |
161 | cpl->peer_port = inet->inet_dport; | |
162 | cpl->local_ip = inet->inet_rcv_saddr; | |
163 | cpl->peer_ip = inet->inet_daddr; | |
164 | ||
165 | /* fill first 64 bit option field. */ | |
166 | options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F | | |
167 | SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan); | |
168 | cpl->opt0 = cpu_to_be64(options); | |
169 | ||
170 | /* next 64 bit option field. */ | |
171 | options = | |
172 | TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]); | |
173 | cpl->opt2 = htonl(options); | |
174 | ||
175 | return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te); | |
176 | } | |
177 | ||
76d7728d | 178 | #if IS_ENABLED(CONFIG_IPV6) |
62370a4f RM |
179 | /* |
180 | * chcr_ktls_act_open_req6: creates TCB entry for ipv6 connection. | |
181 | * @sk - tcp socket. | |
182 | * @tx_info - driver specific tls info. | |
183 | * @atid - connection active tid. | |
184 | * return - send success/failure. | |
185 | */ | |
186 | static int chcr_ktls_act_open_req6(struct sock *sk, | |
187 | struct chcr_ktls_info *tx_info, | |
188 | int atid) | |
189 | { | |
190 | struct inet_sock *inet = inet_sk(sk); | |
191 | struct cpl_t6_act_open_req6 *cpl6; | |
192 | struct cpl_act_open_req6 *cpl; | |
193 | struct sk_buff *skb; | |
194 | unsigned int len; | |
195 | int qid_atid; | |
196 | u64 options; | |
197 | ||
198 | len = sizeof(*cpl6); | |
199 | skb = alloc_skb(len, GFP_KERNEL); | |
200 | if (unlikely(!skb)) | |
201 | return -ENOMEM; | |
202 | /* mark it a control pkt */ | |
203 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); | |
204 | ||
205 | cpl6 = __skb_put_zero(skb, len); | |
206 | cpl = (struct cpl_act_open_req6 *)cpl6; | |
207 | INIT_TP_WR(cpl6, 0); | |
208 | qid_atid = TID_QID_V(tx_info->rx_qid) | TID_TID_V(atid); | |
209 | OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid)); | |
210 | cpl->local_port = inet->inet_sport; | |
211 | cpl->peer_port = inet->inet_dport; | |
212 | cpl->local_ip_hi = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[0]; | |
213 | cpl->local_ip_lo = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[8]; | |
214 | cpl->peer_ip_hi = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[0]; | |
215 | cpl->peer_ip_lo = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[8]; | |
216 | ||
217 | /* first 64 bit option field. */ | |
218 | options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F | | |
219 | SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan); | |
220 | cpl->opt0 = cpu_to_be64(options); | |
221 | /* next 64 bit option field. */ | |
222 | options = | |
223 | TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]); | |
224 | cpl->opt2 = htonl(options); | |
225 | ||
226 | return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te); | |
227 | } | |
76d7728d | 228 | #endif /* #if IS_ENABLED(CONFIG_IPV6) */ |
62370a4f | 229 | |
34aba2c4 RM |
230 | /* |
231 | * chcr_setup_connection: create a TCB entry so that TP will form tcp packets. | |
232 | * @sk - tcp socket. | |
233 | * @tx_info - driver specific tls info. | |
234 | * return: NET_TX_OK/NET_XMIT_DROP | |
235 | */ | |
236 | static int chcr_setup_connection(struct sock *sk, | |
237 | struct chcr_ktls_info *tx_info) | |
238 | { | |
239 | struct tid_info *t = &tx_info->adap->tids; | |
240 | int atid, ret = 0; | |
241 | ||
242 | atid = cxgb4_alloc_atid(t, tx_info); | |
243 | if (atid == -1) | |
244 | return -EINVAL; | |
245 | ||
246 | tx_info->atid = atid; | |
34aba2c4 | 247 | |
efca3878 | 248 | if (tx_info->ip_family == AF_INET) { |
34aba2c4 | 249 | ret = chcr_ktls_act_open_req(sk, tx_info, atid); |
76d7728d | 250 | #if IS_ENABLED(CONFIG_IPV6) |
34aba2c4 | 251 | } else { |
efca3878 RM |
252 | ret = cxgb4_clip_get(tx_info->netdev, (const u32 *) |
253 | &sk->sk_v6_rcv_saddr, | |
254 | 1); | |
255 | if (ret) | |
256 | return ret; | |
257 | ret = chcr_ktls_act_open_req6(sk, tx_info, atid); | |
76d7728d | 258 | #endif |
34aba2c4 RM |
259 | } |
260 | ||
261 | /* if return type is NET_XMIT_CN, msg will be sent but delayed, mark ret | |
262 | * success, if any other return type clear atid and return that failure. | |
263 | */ | |
264 | if (ret) { | |
efca3878 | 265 | if (ret == NET_XMIT_CN) { |
34aba2c4 | 266 | ret = 0; |
efca3878 RM |
267 | } else { |
268 | #if IS_ENABLED(CONFIG_IPV6) | |
269 | /* clear clip entry */ | |
270 | if (tx_info->ip_family == AF_INET6) | |
271 | cxgb4_clip_release(tx_info->netdev, | |
272 | (const u32 *) | |
273 | &sk->sk_v6_rcv_saddr, | |
274 | 1); | |
275 | #endif | |
34aba2c4 | 276 | cxgb4_free_atid(t, atid); |
efca3878 | 277 | } |
34aba2c4 RM |
278 | } |
279 | ||
280 | return ret; | |
281 | } | |
282 | ||
283 | /* | |
284 | * chcr_set_tcb_field: update tcb fields. | |
285 | * @tx_info - driver specific tls info. | |
286 | * @word - TCB word. | |
287 | * @mask - TCB word related mask. | |
288 | * @val - TCB word related value. | |
289 | * @no_reply - set 1 if not looking for TP response. | |
290 | */ | |
291 | static int chcr_set_tcb_field(struct chcr_ktls_info *tx_info, u16 word, | |
292 | u64 mask, u64 val, int no_reply) | |
293 | { | |
294 | struct cpl_set_tcb_field *req; | |
295 | struct sk_buff *skb; | |
296 | ||
297 | skb = alloc_skb(sizeof(struct cpl_set_tcb_field), GFP_ATOMIC); | |
298 | if (!skb) | |
299 | return -ENOMEM; | |
300 | ||
301 | req = (struct cpl_set_tcb_field *)__skb_put_zero(skb, sizeof(*req)); | |
302 | INIT_TP_WR_CPL(req, CPL_SET_TCB_FIELD, tx_info->tid); | |
303 | req->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) | | |
304 | NO_REPLY_V(no_reply)); | |
305 | req->word_cookie = htons(TCB_WORD_V(word)); | |
306 | req->mask = cpu_to_be64(mask); | |
307 | req->val = cpu_to_be64(val); | |
308 | ||
309 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); | |
310 | return cxgb4_ofld_send(tx_info->netdev, skb); | |
311 | } | |
312 | ||
313 | /* | |
314 | * chcr_ktls_mark_tcb_close: mark tcb state to CLOSE | |
315 | * @tx_info - driver specific tls info. | |
316 | * return: NET_TX_OK/NET_XMIT_DROP. | |
317 | */ | |
318 | static int chcr_ktls_mark_tcb_close(struct chcr_ktls_info *tx_info) | |
319 | { | |
320 | return chcr_set_tcb_field(tx_info, TCB_T_STATE_W, | |
321 | TCB_T_STATE_V(TCB_T_STATE_M), | |
322 | CHCR_TCB_STATE_CLOSED, 1); | |
323 | } | |
324 | ||
325 | /* | |
326 | * chcr_ktls_dev_del: call back for tls_dev_del. | |
327 | * Remove the tid and l2t entry and close the connection. | |
328 | * it per connection basis. | |
329 | * @netdev - net device. | |
330 | * @tls_cts - tls context. | |
331 | * @direction - TX/RX crypto direction | |
332 | */ | |
a8c16e8e RM |
333 | static void chcr_ktls_dev_del(struct net_device *netdev, |
334 | struct tls_context *tls_ctx, | |
335 | enum tls_offload_ctx_dir direction) | |
34aba2c4 RM |
336 | { |
337 | struct chcr_ktls_ofld_ctx_tx *tx_ctx = | |
338 | chcr_get_ktls_tx_context(tls_ctx); | |
339 | struct chcr_ktls_info *tx_info = tx_ctx->chcr_info; | |
3427e13e | 340 | struct ch_ktls_port_stats_debug *port_stats; |
34aba2c4 RM |
341 | |
342 | if (!tx_info) | |
343 | return; | |
34aba2c4 | 344 | |
62370a4f | 345 | /* clear l2t entry */ |
34aba2c4 RM |
346 | if (tx_info->l2te) |
347 | cxgb4_l2t_release(tx_info->l2te); | |
348 | ||
76d7728d | 349 | #if IS_ENABLED(CONFIG_IPV6) |
62370a4f RM |
350 | /* clear clip entry */ |
351 | if (tx_info->ip_family == AF_INET6) | |
efca3878 RM |
352 | cxgb4_clip_release(netdev, (const u32 *) |
353 | &tx_info->sk->sk_v6_rcv_saddr, | |
62370a4f | 354 | 1); |
76d7728d | 355 | #endif |
62370a4f RM |
356 | |
357 | /* clear tid */ | |
34aba2c4 RM |
358 | if (tx_info->tid != -1) { |
359 | /* clear tcb state and then release tid */ | |
360 | chcr_ktls_mark_tcb_close(tx_info); | |
361 | cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, | |
362 | tx_info->tid, tx_info->ip_family); | |
363 | } | |
62370a4f | 364 | |
3427e13e RM |
365 | port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id]; |
366 | atomic64_inc(&port_stats->ktls_tx_connection_close); | |
34aba2c4 RM |
367 | kvfree(tx_info); |
368 | tx_ctx->chcr_info = NULL; | |
a3ac249a RM |
369 | /* release module refcount */ |
370 | module_put(THIS_MODULE); | |
34aba2c4 RM |
371 | } |
372 | ||
373 | /* | |
374 | * chcr_ktls_dev_add: call back for tls_dev_add. | |
375 | * Create a tcb entry for TP. Also add l2t entry for the connection. And | |
376 | * generate keys & save those keys locally. | |
377 | * @netdev - net device. | |
378 | * @tls_cts - tls context. | |
379 | * @direction - TX/RX crypto direction | |
380 | * return: SUCCESS/FAILURE. | |
381 | */ | |
a8c16e8e RM |
382 | static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk, |
383 | enum tls_offload_ctx_dir direction, | |
384 | struct tls_crypto_info *crypto_info, | |
385 | u32 start_offload_tcp_sn) | |
34aba2c4 RM |
386 | { |
387 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
3427e13e | 388 | struct ch_ktls_port_stats_debug *port_stats; |
34aba2c4 RM |
389 | struct chcr_ktls_ofld_ctx_tx *tx_ctx; |
390 | struct chcr_ktls_info *tx_info; | |
391 | struct dst_entry *dst; | |
392 | struct adapter *adap; | |
393 | struct port_info *pi; | |
394 | struct neighbour *n; | |
395 | u8 daaddr[16]; | |
396 | int ret = -1; | |
397 | ||
398 | tx_ctx = chcr_get_ktls_tx_context(tls_ctx); | |
399 | ||
400 | pi = netdev_priv(netdev); | |
401 | adap = pi->adapter; | |
3427e13e RM |
402 | port_stats = &adap->ch_ktls_stats.ktls_port[pi->port_id]; |
403 | atomic64_inc(&port_stats->ktls_tx_connection_open); | |
efca3878 | 404 | |
34aba2c4 RM |
405 | if (direction == TLS_OFFLOAD_CTX_DIR_RX) { |
406 | pr_err("not expecting for RX direction\n"); | |
34aba2c4 RM |
407 | goto out; |
408 | } | |
efca3878 RM |
409 | |
410 | if (tx_ctx->chcr_info) | |
34aba2c4 | 411 | goto out; |
34aba2c4 RM |
412 | |
413 | tx_info = kvzalloc(sizeof(*tx_info), GFP_KERNEL); | |
efca3878 | 414 | if (!tx_info) |
34aba2c4 | 415 | goto out; |
34aba2c4 RM |
416 | |
417 | tx_info->sk = sk; | |
efca3878 | 418 | spin_lock_init(&tx_info->lock); |
34aba2c4 RM |
419 | /* initialize tid and atid to -1, 0 is a also a valid id. */ |
420 | tx_info->tid = -1; | |
421 | tx_info->atid = -1; | |
422 | ||
423 | tx_info->adap = adap; | |
424 | tx_info->netdev = netdev; | |
5a4b9fe7 | 425 | tx_info->first_qset = pi->first_qset; |
34aba2c4 RM |
426 | tx_info->tx_chan = pi->tx_chan; |
427 | tx_info->smt_idx = pi->smt_idx; | |
428 | tx_info->port_id = pi->port_id; | |
efca3878 RM |
429 | tx_info->prev_ack = 0; |
430 | tx_info->prev_win = 0; | |
34aba2c4 RM |
431 | |
432 | tx_info->rx_qid = chcr_get_first_rx_qid(adap); | |
433 | if (unlikely(tx_info->rx_qid < 0)) | |
efca3878 | 434 | goto free_tx_info; |
34aba2c4 RM |
435 | |
436 | tx_info->prev_seq = start_offload_tcp_sn; | |
437 | tx_info->tcp_start_seq_number = start_offload_tcp_sn; | |
438 | ||
8a30923e RM |
439 | /* save crypto keys */ |
440 | ret = chcr_ktls_save_keys(tx_info, crypto_info, direction); | |
441 | if (ret < 0) | |
efca3878 | 442 | goto free_tx_info; |
8a30923e | 443 | |
34aba2c4 | 444 | /* get peer ip */ |
76d7728d | 445 | if (sk->sk_family == AF_INET) { |
34aba2c4 | 446 | memcpy(daaddr, &sk->sk_daddr, 4); |
efca3878 | 447 | tx_info->ip_family = AF_INET; |
76d7728d | 448 | #if IS_ENABLED(CONFIG_IPV6) |
34aba2c4 | 449 | } else { |
76d7728d | 450 | if (!sk->sk_ipv6only && |
efca3878 | 451 | ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) { |
76d7728d | 452 | memcpy(daaddr, &sk->sk_daddr, 4); |
efca3878 RM |
453 | tx_info->ip_family = AF_INET; |
454 | } else { | |
76d7728d | 455 | memcpy(daaddr, sk->sk_v6_daddr.in6_u.u6_addr8, 16); |
efca3878 RM |
456 | tx_info->ip_family = AF_INET6; |
457 | } | |
76d7728d | 458 | #endif |
34aba2c4 RM |
459 | } |
460 | ||
461 | /* get the l2t index */ | |
462 | dst = sk_dst_get(sk); | |
463 | if (!dst) { | |
464 | pr_err("DST entry not found\n"); | |
efca3878 | 465 | goto free_tx_info; |
34aba2c4 RM |
466 | } |
467 | n = dst_neigh_lookup(dst, daaddr); | |
468 | if (!n || !n->dev) { | |
469 | pr_err("neighbour not found\n"); | |
470 | dst_release(dst); | |
efca3878 | 471 | goto free_tx_info; |
34aba2c4 RM |
472 | } |
473 | tx_info->l2te = cxgb4_l2t_get(adap->l2t, n, n->dev, 0); | |
474 | ||
475 | neigh_release(n); | |
476 | dst_release(dst); | |
477 | ||
478 | if (!tx_info->l2te) { | |
479 | pr_err("l2t entry not found\n"); | |
efca3878 | 480 | goto free_tx_info; |
34aba2c4 RM |
481 | } |
482 | ||
efca3878 RM |
483 | /* Driver shouldn't be removed until any single connection exists */ |
484 | if (!try_module_get(THIS_MODULE)) | |
485 | goto free_l2t; | |
34aba2c4 | 486 | |
efca3878 | 487 | init_completion(&tx_info->completion); |
34aba2c4 RM |
488 | /* create a filter and call cxgb4_l2t_send to send the packet out, which |
489 | * will take care of updating l2t entry in hw if not already done. | |
490 | */ | |
efca3878 | 491 | tx_info->open_state = CH_KTLS_OPEN_PENDING; |
34aba2c4 | 492 | |
efca3878 RM |
493 | if (chcr_setup_connection(sk, tx_info)) |
494 | goto put_module; | |
495 | ||
496 | /* Wait for reply */ | |
497 | wait_for_completion_timeout(&tx_info->completion, 30 * HZ); | |
498 | spin_lock_bh(&tx_info->lock); | |
499 | if (tx_info->open_state) { | |
500 | /* need to wait for hw response, can't free tx_info yet. */ | |
501 | if (tx_info->open_state == CH_KTLS_OPEN_PENDING) | |
502 | tx_info->pending_close = true; | |
503 | /* free the lock after the cleanup */ | |
504 | goto put_module; | |
505 | } | |
506 | spin_unlock_bh(&tx_info->lock); | |
507 | ||
508 | /* initialize tcb */ | |
509 | reinit_completion(&tx_info->completion); | |
510 | /* mark it pending for hw response */ | |
511 | tx_info->open_state = CH_KTLS_OPEN_PENDING; | |
512 | ||
513 | if (chcr_init_tcb_fields(tx_info)) | |
514 | goto free_tid; | |
515 | ||
516 | /* Wait for reply */ | |
517 | wait_for_completion_timeout(&tx_info->completion, 30 * HZ); | |
518 | spin_lock_bh(&tx_info->lock); | |
519 | if (tx_info->open_state) { | |
520 | /* need to wait for hw response, can't free tx_info yet. */ | |
521 | tx_info->pending_close = true; | |
522 | /* free the lock after cleanup */ | |
523 | goto free_tid; | |
a3ac249a | 524 | } |
efca3878 RM |
525 | spin_unlock_bh(&tx_info->lock); |
526 | ||
527 | if (!cxgb4_check_l2t_valid(tx_info->l2te)) | |
528 | goto free_tid; | |
529 | ||
3427e13e | 530 | atomic64_inc(&port_stats->ktls_tx_ctx); |
efca3878 | 531 | tx_ctx->chcr_info = tx_info; |
a3ac249a | 532 | |
34aba2c4 | 533 | return 0; |
efca3878 RM |
534 | |
535 | free_tid: | |
536 | chcr_ktls_mark_tcb_close(tx_info); | |
537 | #if IS_ENABLED(CONFIG_IPV6) | |
538 | /* clear clip entry */ | |
539 | if (tx_info->ip_family == AF_INET6) | |
540 | cxgb4_clip_release(netdev, (const u32 *) | |
541 | &sk->sk_v6_rcv_saddr, | |
542 | 1); | |
543 | #endif | |
544 | cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, | |
545 | tx_info->tid, tx_info->ip_family); | |
546 | ||
547 | put_module: | |
548 | /* release module refcount */ | |
549 | module_put(THIS_MODULE); | |
550 | free_l2t: | |
551 | cxgb4_l2t_release(tx_info->l2te); | |
552 | free_tx_info: | |
553 | if (tx_info->pending_close) | |
554 | spin_unlock_bh(&tx_info->lock); | |
555 | else | |
556 | kvfree(tx_info); | |
34aba2c4 | 557 | out: |
3427e13e | 558 | atomic64_inc(&port_stats->ktls_tx_connection_fail); |
efca3878 | 559 | return -1; |
34aba2c4 RM |
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 | */ | |
a8c16e8e RM |
606 | static int chcr_ktls_cpl_act_open_rpl(struct adapter *adap, |
607 | unsigned char *input) | |
8a30923e RM |
608 | { |
609 | const struct cpl_act_open_rpl *p = (void *)input; | |
610 | struct chcr_ktls_info *tx_info = NULL; | |
611 | unsigned int atid, tid, status; | |
612 | struct tid_info *t; | |
613 | ||
614 | tid = GET_TID(p); | |
615 | status = AOPEN_STATUS_G(ntohl(p->atid_status)); | |
616 | atid = TID_TID_G(AOPEN_ATID_G(ntohl(p->atid_status))); | |
617 | ||
618 | t = &adap->tids; | |
619 | tx_info = lookup_atid(t, atid); | |
620 | ||
621 | if (!tx_info || tx_info->atid != atid) { | |
efca3878 | 622 | pr_err("%s: incorrect tx_info or atid\n", __func__); |
8a30923e RM |
623 | return -1; |
624 | } | |
625 | ||
efca3878 RM |
626 | cxgb4_free_atid(t, atid); |
627 | tx_info->atid = -1; | |
628 | ||
629 | spin_lock(&tx_info->lock); | |
630 | /* HW response is very close, finish pending cleanup */ | |
631 | if (tx_info->pending_close) { | |
632 | spin_unlock(&tx_info->lock); | |
633 | if (!status) { | |
634 | /* it's a late success, tcb status is establised, | |
635 | * mark it close. | |
636 | */ | |
637 | chcr_ktls_mark_tcb_close(tx_info); | |
638 | cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, | |
639 | tid, tx_info->ip_family); | |
640 | } | |
641 | kvfree(tx_info); | |
642 | return 0; | |
643 | } | |
644 | ||
8a30923e RM |
645 | if (!status) { |
646 | tx_info->tid = tid; | |
647 | cxgb4_insert_tid(t, tx_info, tx_info->tid, tx_info->ip_family); | |
efca3878 RM |
648 | tx_info->open_state = CH_KTLS_OPEN_SUCCESS; |
649 | } else { | |
650 | tx_info->open_state = CH_KTLS_OPEN_FAILURE; | |
8a30923e | 651 | } |
efca3878 RM |
652 | spin_unlock(&tx_info->lock); |
653 | ||
654 | complete(&tx_info->completion); | |
8a30923e RM |
655 | return 0; |
656 | } | |
657 | ||
658 | /* | |
659 | * chcr_ktls_cpl_set_tcb_rpl: TCB reply received from TP. | |
660 | */ | |
a8c16e8e | 661 | static int chcr_ktls_cpl_set_tcb_rpl(struct adapter *adap, unsigned char *input) |
8a30923e RM |
662 | { |
663 | const struct cpl_set_tcb_rpl *p = (void *)input; | |
664 | struct chcr_ktls_info *tx_info = NULL; | |
665 | struct tid_info *t; | |
a1dd3875 | 666 | u32 tid; |
8a30923e RM |
667 | |
668 | tid = GET_TID(p); | |
8a30923e RM |
669 | |
670 | t = &adap->tids; | |
671 | tx_info = lookup_tid(t, tid); | |
efca3878 | 672 | |
8a30923e | 673 | if (!tx_info || tx_info->tid != tid) { |
efca3878 | 674 | pr_err("%s: incorrect tx_info or tid\n", __func__); |
8a30923e RM |
675 | return -1; |
676 | } | |
efca3878 RM |
677 | |
678 | spin_lock(&tx_info->lock); | |
679 | if (tx_info->pending_close) { | |
680 | spin_unlock(&tx_info->lock); | |
681 | kvfree(tx_info); | |
682 | return 0; | |
683 | } | |
684 | tx_info->open_state = false; | |
685 | spin_unlock(&tx_info->lock); | |
686 | ||
687 | complete(&tx_info->completion); | |
8a30923e RM |
688 | return 0; |
689 | } | |
5a4b9fe7 | 690 | |
071a43e6 AB |
691 | static void *__chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info, |
692 | u32 tid, void *pos, u16 word, u64 mask, | |
5a4b9fe7 RM |
693 | u64 val, u32 reply) |
694 | { | |
695 | struct cpl_set_tcb_field_core *cpl; | |
696 | struct ulptx_idata *idata; | |
697 | struct ulp_txpkt *txpkt; | |
5a4b9fe7 | 698 | |
5a4b9fe7 RM |
699 | /* ULP_TXPKT */ |
700 | txpkt = pos; | |
701 | txpkt->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | ULP_TXPKT_DEST_V(0)); | |
702 | txpkt->len = htonl(DIV_ROUND_UP(CHCR_SET_TCB_FIELD_LEN, 16)); | |
703 | ||
704 | /* ULPTX_IDATA sub-command */ | |
705 | idata = (struct ulptx_idata *)(txpkt + 1); | |
706 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); | |
707 | idata->len = htonl(sizeof(*cpl)); | |
708 | pos = idata + 1; | |
709 | ||
710 | cpl = pos; | |
711 | /* CPL_SET_TCB_FIELD */ | |
712 | OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
713 | cpl->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) | | |
714 | NO_REPLY_V(!reply)); | |
715 | cpl->word_cookie = htons(TCB_WORD_V(word)); | |
716 | cpl->mask = cpu_to_be64(mask); | |
717 | cpl->val = cpu_to_be64(val); | |
718 | ||
719 | /* ULPTX_NOOP */ | |
720 | idata = (struct ulptx_idata *)(cpl + 1); | |
721 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_NOOP)); | |
722 | idata->len = htonl(0); | |
071a43e6 | 723 | pos = idata + 1; |
5a4b9fe7 | 724 | |
071a43e6 AB |
725 | return pos; |
726 | } | |
727 | ||
728 | ||
729 | /* | |
730 | * chcr_write_cpl_set_tcb_ulp: update tcb values. | |
731 | * TCB is responsible to create tcp headers, so all the related values | |
732 | * should be correctly updated. | |
733 | * @tx_info - driver specific tls info. | |
734 | * @q - tx queue on which packet is going out. | |
735 | * @tid - TCB identifier. | |
736 | * @pos - current index where should we start writing. | |
737 | * @word - TCB word. | |
738 | * @mask - TCB word related mask. | |
739 | * @val - TCB word related value. | |
740 | * @reply - set 1 if looking for TP response. | |
741 | * return - next position to write. | |
742 | */ | |
743 | static void *chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info, | |
744 | struct sge_eth_txq *q, u32 tid, | |
745 | void *pos, u16 word, u64 mask, | |
746 | u64 val, u32 reply) | |
747 | { | |
748 | int left = (void *)q->q.stat - pos; | |
749 | ||
750 | if (unlikely(left < CHCR_SET_TCB_FIELD_LEN)) { | |
751 | if (!left) { | |
5a4b9fe7 | 752 | pos = q->q.desc; |
071a43e6 AB |
753 | } else { |
754 | u8 buf[48] = {0}; | |
755 | ||
756 | __chcr_write_cpl_set_tcb_ulp(tx_info, tid, buf, word, | |
757 | mask, val, reply); | |
758 | ||
759 | return chcr_copy_to_txd(buf, &q->q, pos, | |
760 | CHCR_SET_TCB_FIELD_LEN); | |
761 | } | |
5a4b9fe7 RM |
762 | } |
763 | ||
071a43e6 AB |
764 | pos = __chcr_write_cpl_set_tcb_ulp(tx_info, tid, pos, word, |
765 | mask, val, reply); | |
766 | ||
767 | /* check again if we are at the end of the queue */ | |
768 | if (left == CHCR_SET_TCB_FIELD_LEN) | |
769 | pos = q->q.desc; | |
770 | ||
5a4b9fe7 RM |
771 | return pos; |
772 | } | |
773 | ||
774 | /* | |
775 | * chcr_ktls_xmit_tcb_cpls: update tcb entry so that TP will create the header | |
776 | * with updated values like tcp seq, ack, window etc. | |
777 | * @tx_info - driver specific tls info. | |
778 | * @q - TX queue. | |
779 | * @tcp_seq | |
780 | * @tcp_ack | |
781 | * @tcp_win | |
782 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
783 | */ | |
784 | static int chcr_ktls_xmit_tcb_cpls(struct chcr_ktls_info *tx_info, | |
785 | struct sge_eth_txq *q, u64 tcp_seq, | |
786 | u64 tcp_ack, u64 tcp_win) | |
787 | { | |
788 | bool first_wr = ((tx_info->prev_ack == 0) && (tx_info->prev_win == 0)); | |
3427e13e | 789 | struct ch_ktls_port_stats_debug *port_stats; |
5a4b9fe7 RM |
790 | u32 len, cpl = 0, ndesc, wr_len; |
791 | struct fw_ulptx_wr *wr; | |
792 | int credits; | |
793 | void *pos; | |
794 | ||
795 | wr_len = sizeof(*wr); | |
796 | /* there can be max 4 cpls, check if we have enough credits */ | |
797 | len = wr_len + 4 * roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
798 | ndesc = DIV_ROUND_UP(len, 64); | |
799 | ||
800 | credits = chcr_txq_avail(&q->q) - ndesc; | |
801 | if (unlikely(credits < 0)) { | |
802 | chcr_eth_txq_stop(q); | |
803 | return NETDEV_TX_BUSY; | |
804 | } | |
805 | ||
806 | pos = &q->q.desc[q->q.pidx]; | |
807 | /* make space for WR, we'll fill it later when we know all the cpls | |
808 | * being sent out and have complete length. | |
809 | */ | |
810 | wr = pos; | |
811 | pos += wr_len; | |
812 | /* update tx_max if its a re-transmit or the first wr */ | |
813 | if (first_wr || tcp_seq != tx_info->prev_seq) { | |
814 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
815 | TCB_TX_MAX_W, | |
816 | TCB_TX_MAX_V(TCB_TX_MAX_M), | |
817 | TCB_TX_MAX_V(tcp_seq), 0); | |
818 | cpl++; | |
819 | } | |
820 | /* reset snd una if it's a re-transmit pkt */ | |
821 | if (tcp_seq != tx_info->prev_seq) { | |
822 | /* reset snd_una */ | |
3427e13e RM |
823 | port_stats = |
824 | &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id]; | |
5a4b9fe7 RM |
825 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, |
826 | TCB_SND_UNA_RAW_W, | |
827 | TCB_SND_UNA_RAW_V | |
828 | (TCB_SND_UNA_RAW_M), | |
829 | TCB_SND_UNA_RAW_V(0), 0); | |
3427e13e | 830 | atomic64_inc(&port_stats->ktls_tx_ooo); |
5a4b9fe7 RM |
831 | cpl++; |
832 | } | |
833 | /* update ack */ | |
834 | if (first_wr || tx_info->prev_ack != tcp_ack) { | |
835 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
836 | TCB_RCV_NXT_W, | |
837 | TCB_RCV_NXT_V(TCB_RCV_NXT_M), | |
838 | TCB_RCV_NXT_V(tcp_ack), 0); | |
839 | tx_info->prev_ack = tcp_ack; | |
840 | cpl++; | |
841 | } | |
842 | /* update receive window */ | |
843 | if (first_wr || tx_info->prev_win != tcp_win) { | |
844 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
845 | TCB_RCV_WND_W, | |
846 | TCB_RCV_WND_V(TCB_RCV_WND_M), | |
847 | TCB_RCV_WND_V(tcp_win), 0); | |
848 | tx_info->prev_win = tcp_win; | |
849 | cpl++; | |
850 | } | |
851 | ||
852 | if (cpl) { | |
853 | /* get the actual length */ | |
854 | len = wr_len + cpl * roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
855 | /* ULPTX wr */ | |
856 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
857 | wr->cookie = 0; | |
858 | /* fill len in wr field */ | |
859 | wr->flowid_len16 = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(len, 16))); | |
860 | ||
861 | ndesc = DIV_ROUND_UP(len, 64); | |
862 | chcr_txq_advance(&q->q, ndesc); | |
863 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
864 | } | |
865 | return 0; | |
866 | } | |
867 | ||
868 | /* | |
869 | * chcr_ktls_skb_copy | |
870 | * @nskb - new skb where the frags to be added. | |
871 | * @skb - old skb from which frags will be copied. | |
872 | */ | |
873 | static void chcr_ktls_skb_copy(struct sk_buff *skb, struct sk_buff *nskb) | |
874 | { | |
875 | int i; | |
876 | ||
877 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
878 | skb_shinfo(nskb)->frags[i] = skb_shinfo(skb)->frags[i]; | |
879 | __skb_frag_ref(&skb_shinfo(nskb)->frags[i]); | |
880 | } | |
881 | ||
882 | skb_shinfo(nskb)->nr_frags = skb_shinfo(skb)->nr_frags; | |
883 | nskb->len += skb->data_len; | |
884 | nskb->data_len = skb->data_len; | |
885 | nskb->truesize += skb->data_len; | |
886 | } | |
887 | ||
888 | /* | |
889 | * chcr_ktls_get_tx_flits | |
890 | * returns number of flits to be sent out, it includes key context length, WR | |
891 | * size and skb fragments. | |
892 | */ | |
893 | static unsigned int | |
894 | chcr_ktls_get_tx_flits(const struct sk_buff *skb, unsigned int key_ctx_len) | |
895 | { | |
896 | return chcr_sgl_len(skb_shinfo(skb)->nr_frags) + | |
897 | DIV_ROUND_UP(key_ctx_len + CHCR_KTLS_WR_SIZE, 8); | |
898 | } | |
899 | ||
429765a1 RM |
900 | /* |
901 | * chcr_ktls_check_tcp_options: To check if there is any TCP option availbale | |
902 | * other than timestamp. | |
903 | * @skb - skb contains partial record.. | |
904 | * return: 1 / 0 | |
905 | */ | |
906 | static int | |
907 | chcr_ktls_check_tcp_options(struct tcphdr *tcp) | |
908 | { | |
909 | int cnt, opt, optlen; | |
910 | u_char *cp; | |
911 | ||
912 | cp = (u_char *)(tcp + 1); | |
913 | cnt = (tcp->doff << 2) - sizeof(struct tcphdr); | |
914 | for (; cnt > 0; cnt -= optlen, cp += optlen) { | |
915 | opt = cp[0]; | |
916 | if (opt == TCPOPT_EOL) | |
917 | break; | |
918 | if (opt == TCPOPT_NOP) { | |
919 | optlen = 1; | |
920 | } else { | |
921 | if (cnt < 2) | |
922 | break; | |
923 | optlen = cp[1]; | |
924 | if (optlen < 2 || optlen > cnt) | |
925 | break; | |
926 | } | |
927 | switch (opt) { | |
928 | case TCPOPT_NOP: | |
929 | break; | |
930 | default: | |
931 | return 1; | |
932 | } | |
933 | } | |
934 | return 0; | |
935 | } | |
936 | ||
937 | /* | |
938 | * chcr_ktls_write_tcp_options : TP can't send out all the options, we need to | |
939 | * send out separately. | |
940 | * @tx_info - driver specific tls info. | |
941 | * @skb - skb contains partial record.. | |
942 | * @q - TX queue. | |
943 | * @tx_chan - channel number. | |
944 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
945 | */ | |
946 | static int | |
947 | chcr_ktls_write_tcp_options(struct chcr_ktls_info *tx_info, struct sk_buff *skb, | |
948 | struct sge_eth_txq *q, uint32_t tx_chan) | |
949 | { | |
950 | struct fw_eth_tx_pkt_wr *wr; | |
951 | struct cpl_tx_pkt_core *cpl; | |
952 | u32 ctrl, iplen, maclen; | |
76d7728d | 953 | #if IS_ENABLED(CONFIG_IPV6) |
429765a1 | 954 | struct ipv6hdr *ip6; |
76d7728d | 955 | #endif |
429765a1 RM |
956 | unsigned int ndesc; |
957 | struct tcphdr *tcp; | |
958 | int len16, pktlen; | |
959 | struct iphdr *ip; | |
960 | int credits; | |
961 | u8 buf[150]; | |
962 | void *pos; | |
963 | ||
964 | iplen = skb_network_header_len(skb); | |
965 | maclen = skb_mac_header_len(skb); | |
966 | ||
967 | /* packet length = eth hdr len + ip hdr len + tcp hdr len | |
968 | * (including options). | |
969 | */ | |
b1b5cb18 | 970 | pktlen = skb_transport_offset(skb) + tcp_hdrlen(skb); |
429765a1 RM |
971 | |
972 | ctrl = sizeof(*cpl) + pktlen; | |
973 | len16 = DIV_ROUND_UP(sizeof(*wr) + ctrl, 16); | |
974 | /* check how many descriptors needed */ | |
975 | ndesc = DIV_ROUND_UP(len16, 4); | |
976 | ||
977 | credits = chcr_txq_avail(&q->q) - ndesc; | |
978 | if (unlikely(credits < 0)) { | |
979 | chcr_eth_txq_stop(q); | |
980 | return NETDEV_TX_BUSY; | |
981 | } | |
982 | ||
983 | pos = &q->q.desc[q->q.pidx]; | |
984 | wr = pos; | |
985 | ||
986 | /* Firmware work request header */ | |
987 | wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) | | |
988 | FW_WR_IMMDLEN_V(ctrl)); | |
989 | ||
990 | wr->equiq_to_len16 = htonl(FW_WR_LEN16_V(len16)); | |
991 | wr->r3 = 0; | |
992 | ||
993 | cpl = (void *)(wr + 1); | |
994 | ||
995 | /* CPL header */ | |
996 | cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) | TXPKT_INTF_V(tx_chan) | | |
997 | TXPKT_PF_V(tx_info->adap->pf)); | |
998 | cpl->pack = 0; | |
999 | cpl->len = htons(pktlen); | |
1000 | /* checksum offload */ | |
1001 | cpl->ctrl1 = 0; | |
1002 | ||
1003 | pos = cpl + 1; | |
1004 | ||
1005 | memcpy(buf, skb->data, pktlen); | |
1006 | if (tx_info->ip_family == AF_INET) { | |
1007 | /* we need to correct ip header len */ | |
1008 | ip = (struct iphdr *)(buf + maclen); | |
1009 | ip->tot_len = htons(pktlen - maclen); | |
76d7728d | 1010 | #if IS_ENABLED(CONFIG_IPV6) |
429765a1 RM |
1011 | } else { |
1012 | ip6 = (struct ipv6hdr *)(buf + maclen); | |
e14394e6 | 1013 | ip6->payload_len = htons(pktlen - maclen - iplen); |
76d7728d | 1014 | #endif |
429765a1 RM |
1015 | } |
1016 | /* now take care of the tcp header, if fin is not set then clear push | |
1017 | * bit as well, and if fin is set, it will be sent at the last so we | |
1018 | * need to update the tcp sequence number as per the last packet. | |
1019 | */ | |
1020 | tcp = (struct tcphdr *)(buf + maclen + iplen); | |
1021 | ||
1022 | if (!tcp->fin) | |
1023 | tcp->psh = 0; | |
1024 | else | |
1025 | tcp->seq = htonl(tx_info->prev_seq); | |
1026 | ||
1027 | chcr_copy_to_txd(buf, &q->q, pos, pktlen); | |
1028 | ||
1029 | chcr_txq_advance(&q->q, ndesc); | |
1030 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | /* chcr_ktls_skb_shift - Shifts request length paged data from skb to another. | |
1035 | * @tgt- buffer into which tail data gets added | |
1036 | * @skb- buffer from which the paged data comes from | |
1037 | * @shiftlen- shift up to this many bytes | |
1038 | */ | |
1039 | static int chcr_ktls_skb_shift(struct sk_buff *tgt, struct sk_buff *skb, | |
1040 | int shiftlen) | |
1041 | { | |
1042 | skb_frag_t *fragfrom, *fragto; | |
1043 | int from, to, todo; | |
1044 | ||
1045 | WARN_ON(shiftlen > skb->data_len); | |
1046 | ||
1047 | todo = shiftlen; | |
1048 | from = 0; | |
1049 | to = 0; | |
1050 | fragfrom = &skb_shinfo(skb)->frags[from]; | |
1051 | ||
1052 | while ((todo > 0) && (from < skb_shinfo(skb)->nr_frags)) { | |
1053 | fragfrom = &skb_shinfo(skb)->frags[from]; | |
1054 | fragto = &skb_shinfo(tgt)->frags[to]; | |
1055 | ||
1056 | if (todo >= skb_frag_size(fragfrom)) { | |
1057 | *fragto = *fragfrom; | |
1058 | todo -= skb_frag_size(fragfrom); | |
1059 | from++; | |
1060 | to++; | |
1061 | ||
1062 | } else { | |
1063 | __skb_frag_ref(fragfrom); | |
1064 | skb_frag_page_copy(fragto, fragfrom); | |
1065 | skb_frag_off_copy(fragto, fragfrom); | |
1066 | skb_frag_size_set(fragto, todo); | |
1067 | ||
1068 | skb_frag_off_add(fragfrom, todo); | |
1069 | skb_frag_size_sub(fragfrom, todo); | |
1070 | todo = 0; | |
1071 | ||
1072 | to++; | |
1073 | break; | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | /* Ready to "commit" this state change to tgt */ | |
1078 | skb_shinfo(tgt)->nr_frags = to; | |
1079 | ||
1080 | /* Reposition in the original skb */ | |
1081 | to = 0; | |
1082 | while (from < skb_shinfo(skb)->nr_frags) | |
1083 | skb_shinfo(skb)->frags[to++] = skb_shinfo(skb)->frags[from++]; | |
1084 | ||
1085 | skb_shinfo(skb)->nr_frags = to; | |
1086 | ||
1087 | WARN_ON(todo > 0 && !skb_shinfo(skb)->nr_frags); | |
1088 | ||
1089 | skb->len -= shiftlen; | |
1090 | skb->data_len -= shiftlen; | |
1091 | skb->truesize -= shiftlen; | |
1092 | tgt->len += shiftlen; | |
1093 | tgt->data_len += shiftlen; | |
1094 | tgt->truesize += shiftlen; | |
1095 | ||
1096 | return shiftlen; | |
1097 | } | |
1098 | ||
5a4b9fe7 RM |
1099 | /* |
1100 | * chcr_ktls_xmit_wr_complete: This sends out the complete record. If an skb | |
1101 | * received has partial end part of the record, send out the complete record, so | |
1102 | * that crypto block will be able to generate TAG/HASH. | |
1103 | * @skb - segment which has complete or partial end part. | |
1104 | * @tx_info - driver specific tls info. | |
1105 | * @q - TX queue. | |
1106 | * @tcp_seq | |
1107 | * @tcp_push - tcp push bit. | |
1108 | * @mss - segment size. | |
1109 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1110 | */ | |
1111 | static int chcr_ktls_xmit_wr_complete(struct sk_buff *skb, | |
1112 | struct chcr_ktls_info *tx_info, | |
1113 | struct sge_eth_txq *q, u32 tcp_seq, | |
1114 | bool tcp_push, u32 mss) | |
1115 | { | |
1116 | u32 len16, wr_mid = 0, flits = 0, ndesc, cipher_start; | |
1117 | struct adapter *adap = tx_info->adap; | |
1118 | int credits, left, last_desc; | |
1119 | struct tx_sw_desc *sgl_sdesc; | |
1120 | struct cpl_tx_data *tx_data; | |
1121 | struct cpl_tx_sec_pdu *cpl; | |
1122 | struct ulptx_idata *idata; | |
1123 | struct ulp_txpkt *ulptx; | |
1124 | struct fw_ulptx_wr *wr; | |
1125 | void *pos; | |
1126 | u64 *end; | |
1127 | ||
1128 | /* get the number of flits required */ | |
1129 | flits = chcr_ktls_get_tx_flits(skb, tx_info->key_ctx_len); | |
1130 | /* number of descriptors */ | |
1131 | ndesc = chcr_flits_to_desc(flits); | |
1132 | /* check if enough credits available */ | |
1133 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1134 | if (unlikely(credits < 0)) { | |
1135 | chcr_eth_txq_stop(q); | |
1136 | return NETDEV_TX_BUSY; | |
1137 | } | |
1138 | ||
1139 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1140 | /* Credits are below the threshold vaues, stop the queue after | |
1141 | * injecting the Work Request for this packet. | |
1142 | */ | |
1143 | chcr_eth_txq_stop(q); | |
1144 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1145 | } | |
1146 | ||
1147 | last_desc = q->q.pidx + ndesc - 1; | |
1148 | if (last_desc >= q->q.size) | |
1149 | last_desc -= q->q.size; | |
1150 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1151 | ||
1152 | if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) { | |
1153 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1154 | q->mapping_err++; | |
1155 | return NETDEV_TX_BUSY; | |
1156 | } | |
1157 | ||
1158 | pos = &q->q.desc[q->q.pidx]; | |
1159 | end = (u64 *)pos + flits; | |
1160 | /* FW_ULPTX_WR */ | |
1161 | wr = pos; | |
1162 | /* WR will need len16 */ | |
1163 | len16 = DIV_ROUND_UP(flits, 2); | |
1164 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1165 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1166 | wr->cookie = 0; | |
1167 | pos += sizeof(*wr); | |
1168 | /* ULP_TXPKT */ | |
1169 | ulptx = pos; | |
1170 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1171 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1172 | ULP_TXPKT_FID_V(q->q.cntxt_id) | | |
1173 | ULP_TXPKT_RO_F); | |
1174 | ulptx->len = htonl(len16 - 1); | |
1175 | /* ULPTX_IDATA sub-command */ | |
1176 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1177 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1178 | /* idata length will include cpl_tx_sec_pdu + key context size + | |
1179 | * cpl_tx_data header. | |
1180 | */ | |
1181 | idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len + | |
1182 | sizeof(*tx_data)); | |
1183 | /* SEC CPL */ | |
1184 | cpl = (struct cpl_tx_sec_pdu *)(idata + 1); | |
1185 | cpl->op_ivinsrtofst = | |
1186 | htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | | |
1187 | CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) | | |
1188 | CPL_TX_SEC_PDU_PLACEHOLDER_V(1) | | |
1189 | CPL_TX_SEC_PDU_IVINSRTOFST_V(TLS_HEADER_SIZE + 1)); | |
1190 | cpl->pldlen = htonl(skb->data_len); | |
1191 | ||
1192 | /* encryption should start after tls header size + iv size */ | |
1193 | cipher_start = TLS_HEADER_SIZE + tx_info->iv_size + 1; | |
1194 | ||
1195 | cpl->aadstart_cipherstop_hi = | |
1196 | htonl(CPL_TX_SEC_PDU_AADSTART_V(1) | | |
1197 | CPL_TX_SEC_PDU_AADSTOP_V(TLS_HEADER_SIZE) | | |
1198 | CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start)); | |
1199 | ||
1200 | /* authentication will also start after tls header + iv size */ | |
1201 | cpl->cipherstop_lo_authinsert = | |
1202 | htonl(CPL_TX_SEC_PDU_AUTHSTART_V(cipher_start) | | |
1203 | CPL_TX_SEC_PDU_AUTHSTOP_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE) | | |
1204 | CPL_TX_SEC_PDU_AUTHINSERT_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE)); | |
1205 | ||
1206 | /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */ | |
1207 | cpl->seqno_numivs = htonl(tx_info->scmd0_seqno_numivs); | |
1208 | cpl->ivgen_hdrlen = htonl(tx_info->scmd0_ivgen_hdrlen); | |
1209 | cpl->scmd1 = cpu_to_be64(tx_info->record_no); | |
1210 | ||
1211 | pos = cpl + 1; | |
1212 | /* check if space left to fill the keys */ | |
1213 | left = (void *)q->q.stat - pos; | |
1214 | if (!left) { | |
1215 | left = (void *)end - (void *)q->q.stat; | |
1216 | pos = q->q.desc; | |
1217 | end = pos + left; | |
1218 | } | |
1219 | ||
1220 | pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos, | |
1221 | tx_info->key_ctx_len); | |
1222 | left = (void *)q->q.stat - pos; | |
1223 | ||
1224 | if (!left) { | |
1225 | left = (void *)end - (void *)q->q.stat; | |
1226 | pos = q->q.desc; | |
1227 | end = pos + left; | |
1228 | } | |
1229 | /* CPL_TX_DATA */ | |
1230 | tx_data = (void *)pos; | |
1231 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1232 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | TX_LENGTH_V(skb->data_len)); | |
1233 | ||
1234 | tx_data->rsvd = htonl(tcp_seq); | |
1235 | ||
1236 | tx_data->flags = htonl(TX_BYPASS_F); | |
1237 | if (tcp_push) | |
1238 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1239 | ||
1240 | /* check left again, it might go beyond queue limit */ | |
1241 | pos = tx_data + 1; | |
1242 | left = (void *)q->q.stat - pos; | |
1243 | ||
1244 | /* check the position again */ | |
1245 | if (!left) { | |
1246 | left = (void *)end - (void *)q->q.stat; | |
1247 | pos = q->q.desc; | |
1248 | end = pos + left; | |
1249 | } | |
1250 | ||
1251 | /* send the complete packet except the header */ | |
1252 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1253 | sgl_sdesc->addr); | |
1254 | sgl_sdesc->skb = skb; | |
1255 | ||
1256 | chcr_txq_advance(&q->q, ndesc); | |
1257 | cxgb4_ring_tx_db(adap, &q->q, ndesc); | |
a8c16e8e | 1258 | atomic64_inc(&adap->ch_ktls_stats.ktls_tx_send_records); |
5a4b9fe7 RM |
1259 | |
1260 | return 0; | |
1261 | } | |
1262 | ||
dc05f3df RM |
1263 | /* |
1264 | * chcr_ktls_xmit_wr_short: This is to send out partial records. If its | |
1265 | * a middle part of a record, fetch the prior data to make it 16 byte aligned | |
1266 | * and then only send it out. | |
1267 | * | |
1268 | * @skb - skb contains partial record.. | |
1269 | * @tx_info - driver specific tls info. | |
1270 | * @q - TX queue. | |
1271 | * @tcp_seq | |
1272 | * @tcp_push - tcp push bit. | |
1273 | * @mss - segment size. | |
1274 | * @tls_rec_offset - offset from start of the tls record. | |
1275 | * @perior_data - data before the current segment, required to make this record | |
1276 | * 16 byte aligned. | |
1277 | * @prior_data_len - prior_data length (less than 16) | |
1278 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1279 | */ | |
1280 | static int chcr_ktls_xmit_wr_short(struct sk_buff *skb, | |
1281 | struct chcr_ktls_info *tx_info, | |
1282 | struct sge_eth_txq *q, | |
1283 | u32 tcp_seq, bool tcp_push, u32 mss, | |
1284 | u32 tls_rec_offset, u8 *prior_data, | |
1285 | u32 prior_data_len) | |
1286 | { | |
1287 | struct adapter *adap = tx_info->adap; | |
1288 | u32 len16, wr_mid = 0, cipher_start; | |
1289 | unsigned int flits = 0, ndesc; | |
1290 | int credits, left, last_desc; | |
1291 | struct tx_sw_desc *sgl_sdesc; | |
1292 | struct cpl_tx_data *tx_data; | |
1293 | struct cpl_tx_sec_pdu *cpl; | |
1294 | struct ulptx_idata *idata; | |
1295 | struct ulp_txpkt *ulptx; | |
1296 | struct fw_ulptx_wr *wr; | |
1297 | __be64 iv_record; | |
1298 | void *pos; | |
1299 | u64 *end; | |
1300 | ||
1301 | /* get the number of flits required, it's a partial record so 2 flits | |
1302 | * (AES_BLOCK_SIZE) will be added. | |
1303 | */ | |
1304 | flits = chcr_ktls_get_tx_flits(skb, tx_info->key_ctx_len) + 2; | |
1305 | /* get the correct 8 byte IV of this record */ | |
1306 | iv_record = cpu_to_be64(tx_info->iv + tx_info->record_no); | |
1307 | /* If it's a middle record and not 16 byte aligned to run AES CTR, need | |
1308 | * to make it 16 byte aligned. So atleadt 2 extra flits of immediate | |
1309 | * data will be added. | |
1310 | */ | |
1311 | if (prior_data_len) | |
1312 | flits += 2; | |
1313 | /* number of descriptors */ | |
1314 | ndesc = chcr_flits_to_desc(flits); | |
1315 | /* check if enough credits available */ | |
1316 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1317 | if (unlikely(credits < 0)) { | |
1318 | chcr_eth_txq_stop(q); | |
1319 | return NETDEV_TX_BUSY; | |
1320 | } | |
1321 | ||
1322 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1323 | chcr_eth_txq_stop(q); | |
1324 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1325 | } | |
1326 | ||
1327 | last_desc = q->q.pidx + ndesc - 1; | |
1328 | if (last_desc >= q->q.size) | |
1329 | last_desc -= q->q.size; | |
1330 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1331 | ||
1332 | if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) { | |
1333 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1334 | q->mapping_err++; | |
1335 | return NETDEV_TX_BUSY; | |
1336 | } | |
1337 | ||
1338 | pos = &q->q.desc[q->q.pidx]; | |
1339 | end = (u64 *)pos + flits; | |
1340 | /* FW_ULPTX_WR */ | |
1341 | wr = pos; | |
1342 | /* WR will need len16 */ | |
1343 | len16 = DIV_ROUND_UP(flits, 2); | |
1344 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1345 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1346 | wr->cookie = 0; | |
1347 | pos += sizeof(*wr); | |
1348 | /* ULP_TXPKT */ | |
1349 | ulptx = pos; | |
1350 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1351 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1352 | ULP_TXPKT_FID_V(q->q.cntxt_id) | | |
1353 | ULP_TXPKT_RO_F); | |
1354 | ulptx->len = htonl(len16 - 1); | |
1355 | /* ULPTX_IDATA sub-command */ | |
1356 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1357 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1358 | /* idata length will include cpl_tx_sec_pdu + key context size + | |
1359 | * cpl_tx_data header. | |
1360 | */ | |
1361 | idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len + | |
1362 | sizeof(*tx_data) + AES_BLOCK_LEN + prior_data_len); | |
1363 | /* SEC CPL */ | |
1364 | cpl = (struct cpl_tx_sec_pdu *)(idata + 1); | |
1365 | /* cipher start will have tls header + iv size extra if its a header | |
1366 | * part of tls record. else only 16 byte IV will be added. | |
1367 | */ | |
1368 | cipher_start = | |
1369 | AES_BLOCK_LEN + 1 + | |
1370 | (!tls_rec_offset ? TLS_HEADER_SIZE + tx_info->iv_size : 0); | |
1371 | ||
1372 | cpl->op_ivinsrtofst = | |
1373 | htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | | |
1374 | CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) | | |
1375 | CPL_TX_SEC_PDU_IVINSRTOFST_V(1)); | |
1376 | cpl->pldlen = htonl(skb->data_len + AES_BLOCK_LEN + prior_data_len); | |
1377 | cpl->aadstart_cipherstop_hi = | |
1378 | htonl(CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start)); | |
1379 | cpl->cipherstop_lo_authinsert = 0; | |
1380 | /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */ | |
1381 | cpl->seqno_numivs = htonl(tx_info->scmd0_short_seqno_numivs); | |
1382 | cpl->ivgen_hdrlen = htonl(tx_info->scmd0_short_ivgen_hdrlen); | |
1383 | cpl->scmd1 = 0; | |
1384 | ||
1385 | pos = cpl + 1; | |
1386 | /* check if space left to fill the keys */ | |
1387 | left = (void *)q->q.stat - pos; | |
1388 | if (!left) { | |
1389 | left = (void *)end - (void *)q->q.stat; | |
1390 | pos = q->q.desc; | |
1391 | end = pos + left; | |
1392 | } | |
1393 | ||
1394 | pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos, | |
1395 | tx_info->key_ctx_len); | |
1396 | left = (void *)q->q.stat - pos; | |
1397 | ||
1398 | if (!left) { | |
1399 | left = (void *)end - (void *)q->q.stat; | |
1400 | pos = q->q.desc; | |
1401 | end = pos + left; | |
1402 | } | |
1403 | /* CPL_TX_DATA */ | |
1404 | tx_data = (void *)pos; | |
1405 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1406 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | | |
1407 | TX_LENGTH_V(skb->data_len + prior_data_len)); | |
1408 | tx_data->rsvd = htonl(tcp_seq); | |
1409 | tx_data->flags = htonl(TX_BYPASS_F); | |
1410 | if (tcp_push) | |
1411 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1412 | ||
1413 | /* check left again, it might go beyond queue limit */ | |
1414 | pos = tx_data + 1; | |
1415 | left = (void *)q->q.stat - pos; | |
1416 | ||
1417 | /* check the position again */ | |
1418 | if (!left) { | |
1419 | left = (void *)end - (void *)q->q.stat; | |
1420 | pos = q->q.desc; | |
1421 | end = pos + left; | |
1422 | } | |
1423 | /* copy the 16 byte IV for AES-CTR, which includes 4 bytes of salt, 8 | |
1424 | * bytes of actual IV and 4 bytes of 16 byte-sequence. | |
1425 | */ | |
1426 | memcpy(pos, tx_info->key_ctx.salt, tx_info->salt_size); | |
1427 | memcpy(pos + tx_info->salt_size, &iv_record, tx_info->iv_size); | |
1428 | *(__be32 *)(pos + tx_info->salt_size + tx_info->iv_size) = | |
1429 | htonl(2 + (tls_rec_offset ? ((tls_rec_offset - | |
1430 | (TLS_HEADER_SIZE + tx_info->iv_size)) / AES_BLOCK_LEN) : 0)); | |
1431 | ||
1432 | pos += 16; | |
1433 | /* Prior_data_len will always be less than 16 bytes, fill the | |
1434 | * prio_data_len after AES_CTRL_BLOCK and clear the remaining length | |
1435 | * to 0. | |
1436 | */ | |
1437 | if (prior_data_len) | |
1438 | pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16); | |
1439 | /* send the complete packet except the header */ | |
1440 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1441 | sgl_sdesc->addr); | |
1442 | sgl_sdesc->skb = skb; | |
1443 | ||
1444 | chcr_txq_advance(&q->q, ndesc); | |
1445 | cxgb4_ring_tx_db(adap, &q->q, ndesc); | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
1450 | /* | |
1451 | * chcr_ktls_tx_plaintxt: This handler will take care of the records which has | |
1452 | * only plain text (only tls header and iv) | |
1453 | * @tx_info - driver specific tls info. | |
1454 | * @skb - skb contains partial record.. | |
1455 | * @tcp_seq | |
1456 | * @mss - segment size. | |
1457 | * @tcp_push - tcp push bit. | |
1458 | * @q - TX queue. | |
1459 | * @port_id : port number | |
1460 | * @perior_data - data before the current segment, required to make this record | |
1461 | * 16 byte aligned. | |
1462 | * @prior_data_len - prior_data length (less than 16) | |
1463 | * return: NETDEV_TX_BUSY/NET_TX_OK. | |
1464 | */ | |
1465 | static int chcr_ktls_tx_plaintxt(struct chcr_ktls_info *tx_info, | |
1466 | struct sk_buff *skb, u32 tcp_seq, u32 mss, | |
1467 | bool tcp_push, struct sge_eth_txq *q, | |
1468 | u32 port_id, u8 *prior_data, | |
1469 | u32 prior_data_len) | |
1470 | { | |
1471 | int credits, left, len16, last_desc; | |
1472 | unsigned int flits = 0, ndesc; | |
1473 | struct tx_sw_desc *sgl_sdesc; | |
1474 | struct cpl_tx_data *tx_data; | |
1475 | struct ulptx_idata *idata; | |
1476 | struct ulp_txpkt *ulptx; | |
1477 | struct fw_ulptx_wr *wr; | |
1478 | u32 wr_mid = 0; | |
1479 | void *pos; | |
1480 | u64 *end; | |
1481 | ||
1482 | flits = DIV_ROUND_UP(CHCR_PLAIN_TX_DATA_LEN, 8); | |
1483 | flits += chcr_sgl_len(skb_shinfo(skb)->nr_frags); | |
1484 | if (prior_data_len) | |
1485 | flits += 2; | |
1486 | /* WR will need len16 */ | |
1487 | len16 = DIV_ROUND_UP(flits, 2); | |
1488 | /* check how many descriptors needed */ | |
1489 | ndesc = DIV_ROUND_UP(flits, 8); | |
1490 | ||
1491 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1492 | if (unlikely(credits < 0)) { | |
1493 | chcr_eth_txq_stop(q); | |
1494 | return NETDEV_TX_BUSY; | |
1495 | } | |
1496 | ||
1497 | if (unlikely(credits < ETHTXQ_STOP_THRES)) { | |
1498 | chcr_eth_txq_stop(q); | |
1499 | wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; | |
1500 | } | |
1501 | ||
1502 | last_desc = q->q.pidx + ndesc - 1; | |
1503 | if (last_desc >= q->q.size) | |
1504 | last_desc -= q->q.size; | |
1505 | sgl_sdesc = &q->q.sdesc[last_desc]; | |
1506 | ||
1507 | if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb, | |
1508 | sgl_sdesc->addr) < 0)) { | |
1509 | memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); | |
1510 | q->mapping_err++; | |
1511 | return NETDEV_TX_BUSY; | |
1512 | } | |
1513 | ||
1514 | pos = &q->q.desc[q->q.pidx]; | |
1515 | end = (u64 *)pos + flits; | |
1516 | /* FW_ULPTX_WR */ | |
1517 | wr = pos; | |
1518 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1519 | wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); | |
1520 | wr->cookie = 0; | |
1521 | pos += sizeof(*wr); | |
1522 | /* ULP_TXPKT */ | |
1523 | ulptx = (struct ulp_txpkt *)(wr + 1); | |
1524 | ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | | |
1525 | ULP_TXPKT_DATAMODIFY_V(0) | | |
1526 | ULP_TXPKT_CHANNELID_V(tx_info->port_id) | | |
1527 | ULP_TXPKT_DEST_V(0) | | |
1528 | ULP_TXPKT_FID_V(q->q.cntxt_id) | ULP_TXPKT_RO_V(1)); | |
1529 | ulptx->len = htonl(len16 - 1); | |
1530 | /* ULPTX_IDATA sub-command */ | |
1531 | idata = (struct ulptx_idata *)(ulptx + 1); | |
1532 | idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); | |
1533 | idata->len = htonl(sizeof(*tx_data) + prior_data_len); | |
1534 | /* CPL_TX_DATA */ | |
1535 | tx_data = (struct cpl_tx_data *)(idata + 1); | |
1536 | OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); | |
1537 | tx_data->len = htonl(TX_DATA_MSS_V(mss) | | |
1538 | TX_LENGTH_V(skb->data_len + prior_data_len)); | |
1539 | /* set tcp seq number */ | |
1540 | tx_data->rsvd = htonl(tcp_seq); | |
1541 | tx_data->flags = htonl(TX_BYPASS_F); | |
1542 | if (tcp_push) | |
1543 | tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); | |
1544 | ||
1545 | pos = tx_data + 1; | |
1546 | /* apart from prior_data_len, we should set remaining part of 16 bytes | |
1547 | * to be zero. | |
1548 | */ | |
1549 | if (prior_data_len) | |
1550 | pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16); | |
1551 | ||
1552 | /* check left again, it might go beyond queue limit */ | |
1553 | left = (void *)q->q.stat - pos; | |
1554 | ||
1555 | /* check the position again */ | |
1556 | if (!left) { | |
1557 | left = (void *)end - (void *)q->q.stat; | |
1558 | pos = q->q.desc; | |
1559 | end = pos + left; | |
1560 | } | |
1561 | /* send the complete packet including the header */ | |
1562 | cxgb4_write_sgl(skb, &q->q, pos, end, skb->len - skb->data_len, | |
1563 | sgl_sdesc->addr); | |
1564 | sgl_sdesc->skb = skb; | |
1565 | ||
1566 | chcr_txq_advance(&q->q, ndesc); | |
1567 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
1568 | return 0; | |
1569 | } | |
1570 | ||
429765a1 RM |
1571 | /* |
1572 | * chcr_ktls_copy_record_in_skb | |
1573 | * @nskb - new skb where the frags to be added. | |
1574 | * @record - specific record which has complete 16k record in frags. | |
1575 | */ | |
1576 | static void chcr_ktls_copy_record_in_skb(struct sk_buff *nskb, | |
1577 | struct tls_record_info *record) | |
1578 | { | |
1579 | int i = 0; | |
1580 | ||
1581 | for (i = 0; i < record->num_frags; i++) { | |
1582 | skb_shinfo(nskb)->frags[i] = record->frags[i]; | |
1583 | /* increase the frag ref count */ | |
1584 | __skb_frag_ref(&skb_shinfo(nskb)->frags[i]); | |
1585 | } | |
1586 | ||
1587 | skb_shinfo(nskb)->nr_frags = record->num_frags; | |
1588 | nskb->data_len = record->len; | |
1589 | nskb->len += record->len; | |
1590 | nskb->truesize += record->len; | |
1591 | } | |
1592 | ||
1593 | /* | |
1594 | * chcr_ktls_update_snd_una: Reset the SEND_UNA. It will be done to avoid | |
1595 | * sending the same segment again. It will discard the segment which is before | |
1596 | * the current tx max. | |
1597 | * @tx_info - driver specific tls info. | |
1598 | * @q - TX queue. | |
1599 | * return: NET_TX_OK/NET_XMIT_DROP. | |
1600 | */ | |
1601 | static int chcr_ktls_update_snd_una(struct chcr_ktls_info *tx_info, | |
1602 | struct sge_eth_txq *q) | |
1603 | { | |
1604 | struct fw_ulptx_wr *wr; | |
1605 | unsigned int ndesc; | |
1606 | int credits; | |
1607 | void *pos; | |
1608 | u32 len; | |
1609 | ||
1610 | len = sizeof(*wr) + roundup(CHCR_SET_TCB_FIELD_LEN, 16); | |
1611 | ndesc = DIV_ROUND_UP(len, 64); | |
1612 | ||
1613 | credits = chcr_txq_avail(&q->q) - ndesc; | |
1614 | if (unlikely(credits < 0)) { | |
1615 | chcr_eth_txq_stop(q); | |
1616 | return NETDEV_TX_BUSY; | |
1617 | } | |
1618 | ||
1619 | pos = &q->q.desc[q->q.pidx]; | |
1620 | ||
1621 | wr = pos; | |
1622 | /* ULPTX wr */ | |
1623 | wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); | |
1624 | wr->cookie = 0; | |
1625 | /* fill len in wr field */ | |
1626 | wr->flowid_len16 = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(len, 16))); | |
1627 | ||
1628 | pos += sizeof(*wr); | |
1629 | ||
1630 | pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, | |
1631 | TCB_SND_UNA_RAW_W, | |
1632 | TCB_SND_UNA_RAW_V(TCB_SND_UNA_RAW_M), | |
1633 | TCB_SND_UNA_RAW_V(0), 0); | |
1634 | ||
1635 | chcr_txq_advance(&q->q, ndesc); | |
1636 | cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); | |
1637 | ||
1638 | return 0; | |
1639 | } | |
1640 | ||
5a4b9fe7 RM |
1641 | /* |
1642 | * chcr_end_part_handler: This handler will handle the record which | |
1643 | * is complete or if record's end part is received. T6 adapter has a issue that | |
1644 | * it can't send out TAG with partial record so if its an end part then we have | |
1645 | * to send TAG as well and for which we need to fetch the complete record and | |
1646 | * send it to crypto module. | |
1647 | * @tx_info - driver specific tls info. | |
1648 | * @skb - skb contains partial record. | |
1649 | * @record - complete record of 16K size. | |
1650 | * @tcp_seq | |
1651 | * @mss - segment size in which TP needs to chop a packet. | |
1652 | * @tcp_push_no_fin - tcp push if fin is not set. | |
1653 | * @q - TX queue. | |
1654 | * @tls_end_offset - offset from end of the record. | |
1655 | * @last wr : check if this is the last part of the skb going out. | |
1656 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
1657 | */ | |
1658 | static int chcr_end_part_handler(struct chcr_ktls_info *tx_info, | |
1659 | struct sk_buff *skb, | |
1660 | struct tls_record_info *record, | |
1661 | u32 tcp_seq, int mss, bool tcp_push_no_fin, | |
1662 | struct sge_eth_txq *q, | |
1663 | u32 tls_end_offset, bool last_wr) | |
1664 | { | |
1665 | struct sk_buff *nskb = NULL; | |
1666 | /* check if it is a complete record */ | |
1667 | if (tls_end_offset == record->len) { | |
1668 | nskb = skb; | |
a8c16e8e | 1669 | atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_complete_pkts); |
5a4b9fe7 | 1670 | } else { |
429765a1 RM |
1671 | dev_kfree_skb_any(skb); |
1672 | ||
1673 | nskb = alloc_skb(0, GFP_KERNEL); | |
1674 | if (!nskb) | |
1675 | return NETDEV_TX_BUSY; | |
1676 | /* copy complete record in skb */ | |
1677 | chcr_ktls_copy_record_in_skb(nskb, record); | |
1678 | /* packet is being sent from the beginning, update the tcp_seq | |
1679 | * accordingly. | |
1680 | */ | |
1681 | tcp_seq = tls_record_start_seq(record); | |
1682 | /* reset snd una, so the middle record won't send the already | |
1683 | * sent part. | |
1684 | */ | |
1685 | if (chcr_ktls_update_snd_una(tx_info, q)) | |
1686 | goto out; | |
a8c16e8e | 1687 | atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_end_pkts); |
5a4b9fe7 RM |
1688 | } |
1689 | ||
1690 | if (chcr_ktls_xmit_wr_complete(nskb, tx_info, q, tcp_seq, | |
1691 | (last_wr && tcp_push_no_fin), | |
1692 | mss)) { | |
1693 | goto out; | |
1694 | } | |
1695 | return 0; | |
1696 | out: | |
429765a1 | 1697 | dev_kfree_skb_any(nskb); |
5a4b9fe7 RM |
1698 | return NETDEV_TX_BUSY; |
1699 | } | |
1700 | ||
dc05f3df RM |
1701 | /* |
1702 | * chcr_short_record_handler: This handler will take care of the records which | |
1703 | * doesn't have end part (1st part or the middle part(/s) of a record). In such | |
1704 | * cases, AES CTR will be used in place of AES GCM to send out partial packet. | |
1705 | * This partial record might be the first part of the record, or the middle | |
1706 | * part. In case of middle record we should fetch the prior data to make it 16 | |
1707 | * byte aligned. If it has a partial tls header or iv then get to the start of | |
1708 | * tls header. And if it has partial TAG, then remove the complete TAG and send | |
1709 | * only the payload. | |
1710 | * There is one more possibility that it gets a partial header, send that | |
1711 | * portion as a plaintext. | |
1712 | * @tx_info - driver specific tls info. | |
1713 | * @skb - skb contains partial record.. | |
1714 | * @record - complete record of 16K size. | |
1715 | * @tcp_seq | |
1716 | * @mss - segment size in which TP needs to chop a packet. | |
1717 | * @tcp_push_no_fin - tcp push if fin is not set. | |
1718 | * @q - TX queue. | |
1719 | * @tls_end_offset - offset from end of the record. | |
1720 | * return: NETDEV_TX_OK/NETDEV_TX_BUSY. | |
1721 | */ | |
1722 | static int chcr_short_record_handler(struct chcr_ktls_info *tx_info, | |
1723 | struct sk_buff *skb, | |
1724 | struct tls_record_info *record, | |
1725 | u32 tcp_seq, int mss, bool tcp_push_no_fin, | |
1726 | struct sge_eth_txq *q, u32 tls_end_offset) | |
1727 | { | |
1728 | u32 tls_rec_offset = tcp_seq - tls_record_start_seq(record); | |
1729 | u8 prior_data[16] = {0}; | |
1730 | u32 prior_data_len = 0; | |
1731 | u32 data_len; | |
1732 | ||
1733 | /* check if the skb is ending in middle of tag/HASH, its a big | |
1734 | * trouble, send the packet before the HASH. | |
1735 | */ | |
1736 | int remaining_record = tls_end_offset - skb->data_len; | |
1737 | ||
1738 | if (remaining_record > 0 && | |
1739 | remaining_record < TLS_CIPHER_AES_GCM_128_TAG_SIZE) { | |
1740 | int trimmed_len = skb->data_len - | |
1741 | (TLS_CIPHER_AES_GCM_128_TAG_SIZE - remaining_record); | |
1742 | struct sk_buff *tmp_skb = NULL; | |
1743 | /* don't process the pkt if it is only a partial tag */ | |
1744 | if (skb->data_len < TLS_CIPHER_AES_GCM_128_TAG_SIZE) | |
1745 | goto out; | |
1746 | ||
1747 | WARN_ON(trimmed_len > skb->data_len); | |
1748 | ||
1749 | /* shift to those many bytes */ | |
1750 | tmp_skb = alloc_skb(0, GFP_KERNEL); | |
1751 | if (unlikely(!tmp_skb)) | |
1752 | goto out; | |
1753 | ||
1754 | chcr_ktls_skb_shift(tmp_skb, skb, trimmed_len); | |
1755 | /* free the last trimmed portion */ | |
1756 | dev_kfree_skb_any(skb); | |
1757 | skb = tmp_skb; | |
a8c16e8e | 1758 | atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_trimmed_pkts); |
dc05f3df RM |
1759 | } |
1760 | data_len = skb->data_len; | |
1761 | /* check if the middle record's start point is 16 byte aligned. CTR | |
1762 | * needs 16 byte aligned start point to start encryption. | |
1763 | */ | |
1764 | if (tls_rec_offset) { | |
1765 | /* there is an offset from start, means its a middle record */ | |
1766 | int remaining = 0; | |
1767 | ||
1768 | if (tls_rec_offset < (TLS_HEADER_SIZE + tx_info->iv_size)) { | |
1769 | prior_data_len = tls_rec_offset; | |
1770 | tls_rec_offset = 0; | |
1771 | remaining = 0; | |
1772 | } else { | |
1773 | prior_data_len = | |
1774 | (tls_rec_offset - | |
1775 | (TLS_HEADER_SIZE + tx_info->iv_size)) | |
1776 | % AES_BLOCK_LEN; | |
1777 | remaining = tls_rec_offset - prior_data_len; | |
1778 | } | |
1779 | ||
1780 | /* if prior_data_len is not zero, means we need to fetch prior | |
1781 | * data to make this record 16 byte aligned, or we need to reach | |
1782 | * to start offset. | |
1783 | */ | |
1784 | if (prior_data_len) { | |
1785 | int i = 0; | |
1786 | u8 *data = NULL; | |
1787 | skb_frag_t *f; | |
1788 | u8 *vaddr; | |
1789 | int frag_size = 0, frag_delta = 0; | |
1790 | ||
1791 | while (remaining > 0) { | |
1792 | frag_size = skb_frag_size(&record->frags[i]); | |
1793 | if (remaining < frag_size) | |
1794 | break; | |
1795 | ||
1796 | remaining -= frag_size; | |
1797 | i++; | |
1798 | } | |
1799 | f = &record->frags[i]; | |
1800 | vaddr = kmap_atomic(skb_frag_page(f)); | |
1801 | ||
1802 | data = vaddr + skb_frag_off(f) + remaining; | |
1803 | frag_delta = skb_frag_size(f) - remaining; | |
1804 | ||
1805 | if (frag_delta >= prior_data_len) { | |
1806 | memcpy(prior_data, data, prior_data_len); | |
1807 | kunmap_atomic(vaddr); | |
1808 | } else { | |
1809 | memcpy(prior_data, data, frag_delta); | |
1810 | kunmap_atomic(vaddr); | |
1811 | /* get the next page */ | |
1812 | f = &record->frags[i + 1]; | |
1813 | vaddr = kmap_atomic(skb_frag_page(f)); | |
1814 | data = vaddr + skb_frag_off(f); | |
1815 | memcpy(prior_data + frag_delta, | |
1816 | data, (prior_data_len - frag_delta)); | |
1817 | kunmap_atomic(vaddr); | |
1818 | } | |
1819 | /* reset tcp_seq as per the prior_data_required len */ | |
1820 | tcp_seq -= prior_data_len; | |
1821 | /* include prio_data_len for further calculation. | |
1822 | */ | |
1823 | data_len += prior_data_len; | |
1824 | } | |
1825 | /* reset snd una, so the middle record won't send the already | |
1826 | * sent part. | |
1827 | */ | |
1828 | if (chcr_ktls_update_snd_una(tx_info, q)) | |
1829 | goto out; | |
a8c16e8e | 1830 | atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_middle_pkts); |
dc05f3df RM |
1831 | } else { |
1832 | /* Else means, its a partial first part of the record. Check if | |
1833 | * its only the header, don't need to send for encryption then. | |
1834 | */ | |
1835 | if (data_len <= TLS_HEADER_SIZE + tx_info->iv_size) { | |
1836 | if (chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss, | |
1837 | tcp_push_no_fin, q, | |
1838 | tx_info->port_id, | |
1839 | prior_data, | |
1840 | prior_data_len)) { | |
1841 | goto out; | |
1842 | } | |
1843 | return 0; | |
1844 | } | |
a8c16e8e | 1845 | atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_start_pkts); |
dc05f3df RM |
1846 | } |
1847 | ||
1848 | if (chcr_ktls_xmit_wr_short(skb, tx_info, q, tcp_seq, tcp_push_no_fin, | |
1849 | mss, tls_rec_offset, prior_data, | |
1850 | prior_data_len)) { | |
1851 | goto out; | |
1852 | } | |
1853 | ||
1854 | return 0; | |
1855 | out: | |
1856 | dev_kfree_skb_any(skb); | |
1857 | return NETDEV_TX_BUSY; | |
1858 | } | |
1859 | ||
5a4b9fe7 | 1860 | /* nic tls TX handler */ |
a8c16e8e | 1861 | static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev) |
5a4b9fe7 | 1862 | { |
b1b5cb18 | 1863 | u32 tls_end_offset, tcp_seq, skb_data_len, skb_offset; |
3427e13e | 1864 | struct ch_ktls_port_stats_debug *port_stats; |
5a4b9fe7 | 1865 | struct chcr_ktls_ofld_ctx_tx *tx_ctx; |
a8c16e8e | 1866 | struct ch_ktls_stats_debug *stats; |
5a4b9fe7 RM |
1867 | struct tcphdr *th = tcp_hdr(skb); |
1868 | int data_len, qidx, ret = 0, mss; | |
1869 | struct tls_record_info *record; | |
1870 | struct chcr_ktls_info *tx_info; | |
5a4b9fe7 RM |
1871 | struct tls_context *tls_ctx; |
1872 | struct sk_buff *local_skb; | |
5a4b9fe7 RM |
1873 | struct sge_eth_txq *q; |
1874 | struct adapter *adap; | |
1875 | unsigned long flags; | |
1876 | ||
1877 | tcp_seq = ntohl(th->seq); | |
b1b5cb18 RM |
1878 | skb_offset = skb_transport_offset(skb) + tcp_hdrlen(skb); |
1879 | skb_data_len = skb->len - skb_offset; | |
1880 | data_len = skb_data_len; | |
5a4b9fe7 | 1881 | |
b1b5cb18 | 1882 | mss = skb_is_gso(skb) ? skb_shinfo(skb)->gso_size : data_len; |
5a4b9fe7 | 1883 | |
5a4b9fe7 RM |
1884 | tls_ctx = tls_get_ctx(skb->sk); |
1885 | if (unlikely(tls_ctx->netdev != dev)) | |
1886 | goto out; | |
1887 | ||
1888 | tx_ctx = chcr_get_ktls_tx_context(tls_ctx); | |
1889 | tx_info = tx_ctx->chcr_info; | |
1890 | ||
1891 | if (unlikely(!tx_info)) | |
1892 | goto out; | |
1893 | ||
5a4b9fe7 RM |
1894 | /* don't touch the original skb, make a new skb to extract each records |
1895 | * and send them separately. | |
1896 | */ | |
1897 | local_skb = alloc_skb(0, GFP_KERNEL); | |
1898 | ||
1899 | if (unlikely(!local_skb)) | |
1900 | return NETDEV_TX_BUSY; | |
1901 | ||
1902 | adap = tx_info->adap; | |
a8c16e8e | 1903 | stats = &adap->ch_ktls_stats; |
3427e13e | 1904 | port_stats = &stats->ktls_port[tx_info->port_id]; |
62370a4f | 1905 | |
5a4b9fe7 RM |
1906 | qidx = skb->queue_mapping; |
1907 | q = &adap->sge.ethtxq[qidx + tx_info->first_qset]; | |
1908 | cxgb4_reclaim_completed_tx(adap, &q->q, true); | |
429765a1 RM |
1909 | /* if tcp options are set but finish is not send the options first */ |
1910 | if (!th->fin && chcr_ktls_check_tcp_options(th)) { | |
1911 | ret = chcr_ktls_write_tcp_options(tx_info, skb, q, | |
1912 | tx_info->tx_chan); | |
1913 | if (ret) | |
1914 | return NETDEV_TX_BUSY; | |
1915 | } | |
5a4b9fe7 RM |
1916 | /* update tcb */ |
1917 | ret = chcr_ktls_xmit_tcb_cpls(tx_info, q, ntohl(th->seq), | |
1918 | ntohl(th->ack_seq), | |
1919 | ntohs(th->window)); | |
1920 | if (ret) { | |
1921 | dev_kfree_skb_any(local_skb); | |
1922 | return NETDEV_TX_BUSY; | |
1923 | } | |
1924 | ||
1925 | /* copy skb contents into local skb */ | |
1926 | chcr_ktls_skb_copy(skb, local_skb); | |
1927 | ||
429765a1 | 1928 | /* TCP segments can be in received either complete or partial. |
5a4b9fe7 RM |
1929 | * chcr_end_part_handler will handle cases if complete record or end |
1930 | * part of the record is received. Incase of partial end part of record, | |
1931 | * we will send the complete record again. | |
1932 | */ | |
62370a4f | 1933 | |
5a4b9fe7 RM |
1934 | do { |
1935 | int i; | |
1936 | ||
1937 | cxgb4_reclaim_completed_tx(adap, &q->q, true); | |
1938 | /* lock taken */ | |
1939 | spin_lock_irqsave(&tx_ctx->base.lock, flags); | |
1940 | /* fetch the tls record */ | |
1941 | record = tls_get_record(&tx_ctx->base, tcp_seq, | |
1942 | &tx_info->record_no); | |
1943 | /* By the time packet reached to us, ACK is received, and record | |
1944 | * won't be found in that case, handle it gracefully. | |
1945 | */ | |
1946 | if (unlikely(!record)) { | |
1947 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
3427e13e | 1948 | atomic64_inc(&port_stats->ktls_tx_drop_no_sync_data); |
5a4b9fe7 RM |
1949 | goto out; |
1950 | } | |
1951 | ||
1952 | if (unlikely(tls_record_is_start_marker(record))) { | |
1953 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
3427e13e | 1954 | atomic64_inc(&port_stats->ktls_tx_skip_no_sync_data); |
5a4b9fe7 RM |
1955 | goto out; |
1956 | } | |
1957 | ||
1958 | /* increase page reference count of the record, so that there | |
1959 | * won't be any chance of page free in middle if in case stack | |
1960 | * receives ACK and try to delete the record. | |
1961 | */ | |
1962 | for (i = 0; i < record->num_frags; i++) | |
1963 | __skb_frag_ref(&record->frags[i]); | |
1964 | /* lock cleared */ | |
1965 | spin_unlock_irqrestore(&tx_ctx->base.lock, flags); | |
1966 | ||
1967 | tls_end_offset = record->end_seq - tcp_seq; | |
1968 | ||
1969 | pr_debug("seq 0x%x, end_seq 0x%x prev_seq 0x%x, datalen 0x%x\n", | |
1970 | tcp_seq, record->end_seq, tx_info->prev_seq, data_len); | |
1971 | /* if a tls record is finishing in this SKB */ | |
1972 | if (tls_end_offset <= data_len) { | |
1973 | struct sk_buff *nskb = NULL; | |
1974 | ||
1975 | if (tls_end_offset < data_len) { | |
429765a1 RM |
1976 | nskb = alloc_skb(0, GFP_KERNEL); |
1977 | if (unlikely(!nskb)) { | |
1978 | ret = -ENOMEM; | |
1979 | goto clear_ref; | |
1980 | } | |
1981 | ||
1982 | chcr_ktls_skb_shift(nskb, local_skb, | |
1983 | tls_end_offset); | |
5a4b9fe7 RM |
1984 | } else { |
1985 | /* its the only record in this skb, directly | |
1986 | * point it. | |
1987 | */ | |
1988 | nskb = local_skb; | |
1989 | } | |
1990 | ret = chcr_end_part_handler(tx_info, nskb, record, | |
1991 | tcp_seq, mss, | |
1992 | (!th->fin && th->psh), q, | |
1993 | tls_end_offset, | |
1994 | (nskb == local_skb)); | |
1995 | ||
1996 | if (ret && nskb != local_skb) | |
1997 | dev_kfree_skb_any(local_skb); | |
1998 | ||
1999 | data_len -= tls_end_offset; | |
2000 | /* tcp_seq increment is required to handle next record. | |
2001 | */ | |
2002 | tcp_seq += tls_end_offset; | |
dc05f3df RM |
2003 | } else { |
2004 | ret = chcr_short_record_handler(tx_info, local_skb, | |
2005 | record, tcp_seq, mss, | |
2006 | (!th->fin && th->psh), | |
2007 | q, tls_end_offset); | |
2008 | data_len = 0; | |
5a4b9fe7 RM |
2009 | } |
2010 | clear_ref: | |
2011 | /* clear the frag ref count which increased locally before */ | |
2012 | for (i = 0; i < record->num_frags; i++) { | |
2013 | /* clear the frag ref count */ | |
2014 | __skb_frag_unref(&record->frags[i]); | |
2015 | } | |
dc05f3df | 2016 | /* if any failure, come out from the loop. */ |
5a4b9fe7 RM |
2017 | if (ret) |
2018 | goto out; | |
dc05f3df | 2019 | /* length should never be less than 0 */ |
5a4b9fe7 RM |
2020 | WARN_ON(data_len < 0); |
2021 | ||
2022 | } while (data_len > 0); | |
2023 | ||
b1b5cb18 | 2024 | tx_info->prev_seq = ntohl(th->seq) + skb_data_len; |
3427e13e | 2025 | atomic64_inc(&port_stats->ktls_tx_encrypted_packets); |
b1b5cb18 | 2026 | atomic64_add(skb_data_len, &port_stats->ktls_tx_encrypted_bytes); |
62370a4f | 2027 | |
429765a1 RM |
2028 | /* tcp finish is set, send a separate tcp msg including all the options |
2029 | * as well. | |
2030 | */ | |
2031 | if (th->fin) | |
2032 | chcr_ktls_write_tcp_options(tx_info, skb, q, tx_info->tx_chan); | |
2033 | ||
5a4b9fe7 RM |
2034 | out: |
2035 | dev_kfree_skb_any(skb); | |
2036 | return NETDEV_TX_OK; | |
2037 | } | |
a8c16e8e RM |
2038 | |
2039 | static void *chcr_ktls_uld_add(const struct cxgb4_lld_info *lldi) | |
2040 | { | |
2041 | struct chcr_ktls_uld_ctx *u_ctx; | |
2042 | ||
2043 | pr_info_once("%s - version %s\n", CHCR_KTLS_DRV_DESC, | |
2044 | CHCR_KTLS_DRV_VERSION); | |
2045 | u_ctx = kzalloc(sizeof(*u_ctx), GFP_KERNEL); | |
2046 | if (!u_ctx) { | |
2047 | u_ctx = ERR_PTR(-ENOMEM); | |
2048 | goto out; | |
2049 | } | |
2050 | u_ctx->lldi = *lldi; | |
2051 | out: | |
2052 | return u_ctx; | |
2053 | } | |
2054 | ||
2055 | static const struct tlsdev_ops chcr_ktls_ops = { | |
2056 | .tls_dev_add = chcr_ktls_dev_add, | |
2057 | .tls_dev_del = chcr_ktls_dev_del, | |
2058 | }; | |
2059 | ||
2060 | static chcr_handler_func work_handlers[NUM_CPL_CMDS] = { | |
2061 | [CPL_ACT_OPEN_RPL] = chcr_ktls_cpl_act_open_rpl, | |
2062 | [CPL_SET_TCB_RPL] = chcr_ktls_cpl_set_tcb_rpl, | |
2063 | }; | |
2064 | ||
2065 | static int chcr_ktls_uld_rx_handler(void *handle, const __be64 *rsp, | |
2066 | const struct pkt_gl *pgl) | |
2067 | { | |
2068 | const struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)rsp; | |
2069 | struct chcr_ktls_uld_ctx *u_ctx = handle; | |
2070 | u8 opcode = rpl->ot.opcode; | |
2071 | struct adapter *adap; | |
2072 | ||
2073 | adap = pci_get_drvdata(u_ctx->lldi.pdev); | |
2074 | ||
2075 | if (!work_handlers[opcode]) { | |
2076 | pr_err("Unsupported opcode %d received\n", opcode); | |
2077 | return 0; | |
2078 | } | |
2079 | ||
2080 | work_handlers[opcode](adap, (unsigned char *)&rsp[1]); | |
2081 | return 0; | |
2082 | } | |
2083 | ||
2084 | static int chcr_ktls_uld_state_change(void *handle, enum cxgb4_state new_state) | |
2085 | { | |
2086 | struct chcr_ktls_uld_ctx *u_ctx = handle; | |
2087 | ||
2088 | switch (new_state) { | |
2089 | case CXGB4_STATE_UP: | |
2090 | pr_info("%s: Up\n", pci_name(u_ctx->lldi.pdev)); | |
2091 | mutex_lock(&dev_mutex); | |
2092 | list_add_tail(&u_ctx->entry, &uld_ctx_list); | |
2093 | mutex_unlock(&dev_mutex); | |
2094 | break; | |
2095 | case CXGB4_STATE_START_RECOVERY: | |
2096 | case CXGB4_STATE_DOWN: | |
2097 | case CXGB4_STATE_DETACH: | |
2098 | pr_info("%s: Down\n", pci_name(u_ctx->lldi.pdev)); | |
2099 | mutex_lock(&dev_mutex); | |
2100 | list_del(&u_ctx->entry); | |
2101 | mutex_unlock(&dev_mutex); | |
2102 | break; | |
2103 | default: | |
2104 | break; | |
2105 | } | |
2106 | ||
2107 | return 0; | |
2108 | } | |
2109 | ||
2110 | static struct cxgb4_uld_info chcr_ktls_uld_info = { | |
2111 | .name = CHCR_KTLS_DRV_MODULE_NAME, | |
2112 | .nrxq = 1, | |
2113 | .rxq_size = 1024, | |
2114 | .add = chcr_ktls_uld_add, | |
2115 | .tx_handler = chcr_ktls_xmit, | |
2116 | .rx_handler = chcr_ktls_uld_rx_handler, | |
2117 | .state_change = chcr_ktls_uld_state_change, | |
2118 | .tlsdev_ops = &chcr_ktls_ops, | |
2119 | }; | |
2120 | ||
2121 | static int __init chcr_ktls_init(void) | |
2122 | { | |
2123 | cxgb4_register_uld(CXGB4_ULD_KTLS, &chcr_ktls_uld_info); | |
2124 | return 0; | |
2125 | } | |
2126 | ||
2127 | static void __exit chcr_ktls_exit(void) | |
2128 | { | |
2129 | struct chcr_ktls_uld_ctx *u_ctx, *tmp; | |
2130 | struct adapter *adap; | |
2131 | ||
2132 | pr_info("driver unloaded\n"); | |
2133 | ||
2134 | mutex_lock(&dev_mutex); | |
2135 | list_for_each_entry_safe(u_ctx, tmp, &uld_ctx_list, entry) { | |
2136 | adap = pci_get_drvdata(u_ctx->lldi.pdev); | |
2137 | memset(&adap->ch_ktls_stats, 0, sizeof(adap->ch_ktls_stats)); | |
2138 | list_del(&u_ctx->entry); | |
2139 | kfree(u_ctx); | |
2140 | } | |
2141 | mutex_unlock(&dev_mutex); | |
2142 | cxgb4_unregister_uld(CXGB4_ULD_KTLS); | |
2143 | } | |
2144 | ||
2145 | module_init(chcr_ktls_init); | |
2146 | module_exit(chcr_ktls_exit); | |
2147 | ||
2148 | MODULE_DESCRIPTION("Chelsio NIC TLS ULD driver"); | |
2149 | MODULE_LICENSE("GPL"); | |
2150 | MODULE_AUTHOR("Chelsio Communications"); | |
2151 | MODULE_VERSION(CHCR_KTLS_DRV_VERSION); |