1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 // Copyright (c) 2019 Mellanox Technologies.
3
4 #include <net/inet6_hashtables.h>
5 #include "en_accel/en_accel.h"
6 #include "en_accel/ktls.h"
7 #include "en_accel/ktls_txrx.h"
8 #include "en_accel/ktls_utils.h"
9 #include "en_accel/fs_tcp.h"
10
11 struct accel_rule {
12 struct work_struct work;
13 struct mlx5e_priv *priv;
14 struct mlx5_flow_handle *rule;
15 };
16
17 #define PROGRESS_PARAMS_WRITE_UNIT 64
18 #define PROGRESS_PARAMS_PADDED_SIZE \
19 (ALIGN(sizeof(struct mlx5_wqe_tls_progress_params_seg), \
20 PROGRESS_PARAMS_WRITE_UNIT))
21
22 struct mlx5e_ktls_rx_resync_buf {
23 union {
24 struct mlx5_wqe_tls_progress_params_seg progress;
25 u8 pad[PROGRESS_PARAMS_PADDED_SIZE];
26 } ____cacheline_aligned_in_smp;
27 dma_addr_t dma_addr;
28 struct mlx5e_ktls_offload_context_rx *priv_rx;
29 };
30
31 enum {
32 MLX5E_PRIV_RX_FLAG_DELETING,
33 MLX5E_NUM_PRIV_RX_FLAGS,
34 };
35
36 struct mlx5e_ktls_rx_resync_ctx {
37 struct tls_offload_resync_async core;
38 struct work_struct work;
39 struct mlx5e_priv *priv;
40 refcount_t refcnt;
41 __be64 sw_rcd_sn_be;
42 u32 seq;
43 };
44
45 struct mlx5e_ktls_offload_context_rx {
46 union mlx5e_crypto_info crypto_info;
47 struct accel_rule rule;
48 struct sock *sk;
49 struct mlx5e_rq_stats *rq_stats;
50 struct mlx5e_tls_sw_stats *sw_stats;
51 struct completion add_ctx;
52 struct mlx5e_tir tir;
53 struct mlx5_crypto_dek *dek;
54 u32 rxq;
55 DECLARE_BITMAP(flags, MLX5E_NUM_PRIV_RX_FLAGS);
56
57 /* resync */
58 spinlock_t lock; /* protects resync fields */
59 struct mlx5e_ktls_rx_resync_ctx resync;
60 struct list_head list;
61 };
62
mlx5e_ktls_priv_rx_put(struct mlx5e_ktls_offload_context_rx * priv_rx)63 static bool mlx5e_ktls_priv_rx_put(struct mlx5e_ktls_offload_context_rx *priv_rx)
64 {
65 if (!refcount_dec_and_test(&priv_rx->resync.refcnt))
66 return false;
67
68 kfree(priv_rx);
69 return true;
70 }
71
mlx5e_ktls_priv_rx_get(struct mlx5e_ktls_offload_context_rx * priv_rx)72 static void mlx5e_ktls_priv_rx_get(struct mlx5e_ktls_offload_context_rx *priv_rx)
73 {
74 refcount_inc(&priv_rx->resync.refcnt);
75 }
76
77 struct mlx5e_ktls_resync_resp {
78 /* protects list changes */
79 spinlock_t lock;
80 struct list_head list;
81 };
82
mlx5e_ktls_rx_resync_destroy_resp_list(struct mlx5e_ktls_resync_resp * resp_list)83 void mlx5e_ktls_rx_resync_destroy_resp_list(struct mlx5e_ktls_resync_resp *resp_list)
84 {
85 kvfree(resp_list);
86 }
87
88 struct mlx5e_ktls_resync_resp *
mlx5e_ktls_rx_resync_create_resp_list(void)89 mlx5e_ktls_rx_resync_create_resp_list(void)
90 {
91 struct mlx5e_ktls_resync_resp *resp_list;
92
93 resp_list = kvzalloc(sizeof(*resp_list), GFP_KERNEL);
94 if (!resp_list)
95 return ERR_PTR(-ENOMEM);
96
97 INIT_LIST_HEAD(&resp_list->list);
98 spin_lock_init(&resp_list->lock);
99
100 return resp_list;
101 }
102
accel_rule_handle_work(struct work_struct * work)103 static void accel_rule_handle_work(struct work_struct *work)
104 {
105 struct mlx5e_ktls_offload_context_rx *priv_rx;
106 struct accel_rule *accel_rule;
107 struct mlx5_flow_handle *rule;
108
109 accel_rule = container_of(work, struct accel_rule, work);
110 priv_rx = container_of(accel_rule, struct mlx5e_ktls_offload_context_rx, rule);
111 if (unlikely(test_bit(MLX5E_PRIV_RX_FLAG_DELETING, priv_rx->flags)))
112 goto out;
113
114 rule = mlx5e_accel_fs_add_sk(accel_rule->priv->fs, priv_rx->sk,
115 mlx5e_tir_get_tirn(&priv_rx->tir),
116 MLX5_FS_DEFAULT_FLOW_TAG);
117 if (!IS_ERR_OR_NULL(rule))
118 accel_rule->rule = rule;
119 out:
120 complete(&priv_rx->add_ctx);
121 }
122
accel_rule_init(struct accel_rule * rule,struct mlx5e_priv * priv)123 static void accel_rule_init(struct accel_rule *rule, struct mlx5e_priv *priv)
124 {
125 INIT_WORK(&rule->work, accel_rule_handle_work);
126 rule->priv = priv;
127 }
128
icosq_fill_wi(struct mlx5e_icosq * sq,u16 pi,struct mlx5e_icosq_wqe_info * wi)129 static void icosq_fill_wi(struct mlx5e_icosq *sq, u16 pi,
130 struct mlx5e_icosq_wqe_info *wi)
131 {
132 sq->db.wqe_info[pi] = *wi;
133 }
134
135 static struct mlx5_wqe_ctrl_seg *
post_static_params(struct mlx5e_icosq * sq,struct mlx5e_ktls_offload_context_rx * priv_rx)136 post_static_params(struct mlx5e_icosq *sq,
137 struct mlx5e_ktls_offload_context_rx *priv_rx)
138 {
139 struct mlx5e_set_tls_static_params_wqe *wqe;
140 struct mlx5e_icosq_wqe_info wi;
141 u16 pi, num_wqebbs;
142
143 num_wqebbs = MLX5E_TLS_SET_STATIC_PARAMS_WQEBBS;
144 if (unlikely(!mlx5e_icosq_can_post_wqe(sq, num_wqebbs)))
145 return ERR_PTR(-ENOSPC);
146
147 pi = mlx5e_icosq_get_next_pi(sq, num_wqebbs);
148 wqe = MLX5E_TLS_FETCH_SET_STATIC_PARAMS_WQE(sq, pi);
149 mlx5e_ktls_build_static_params(wqe, sq->pc, sq->sqn, &priv_rx->crypto_info,
150 mlx5e_tir_get_tirn(&priv_rx->tir),
151 mlx5_crypto_dek_get_id(priv_rx->dek),
152 priv_rx->resync.seq, false,
153 TLS_OFFLOAD_CTX_DIR_RX);
154 wi = (struct mlx5e_icosq_wqe_info) {
155 .wqe_type = MLX5E_ICOSQ_WQE_UMR_TLS,
156 .num_wqebbs = num_wqebbs,
157 .tls_set_params.priv_rx = priv_rx,
158 };
159 icosq_fill_wi(sq, pi, &wi);
160 sq->pc += num_wqebbs;
161
162 return &wqe->ctrl;
163 }
164
165 static struct mlx5_wqe_ctrl_seg *
post_progress_params(struct mlx5e_icosq * sq,struct mlx5e_ktls_offload_context_rx * priv_rx,u32 next_record_tcp_sn)166 post_progress_params(struct mlx5e_icosq *sq,
167 struct mlx5e_ktls_offload_context_rx *priv_rx,
168 u32 next_record_tcp_sn)
169 {
170 struct mlx5e_set_tls_progress_params_wqe *wqe;
171 struct mlx5e_icosq_wqe_info wi;
172 u16 pi, num_wqebbs;
173
174 num_wqebbs = MLX5E_TLS_SET_PROGRESS_PARAMS_WQEBBS;
175 if (unlikely(!mlx5e_icosq_can_post_wqe(sq, num_wqebbs)))
176 return ERR_PTR(-ENOSPC);
177
178 pi = mlx5e_icosq_get_next_pi(sq, num_wqebbs);
179 wqe = MLX5E_TLS_FETCH_SET_PROGRESS_PARAMS_WQE(sq, pi);
180 mlx5e_ktls_build_progress_params(wqe, sq->pc, sq->sqn,
181 mlx5e_tir_get_tirn(&priv_rx->tir),
182 false, next_record_tcp_sn,
183 TLS_OFFLOAD_CTX_DIR_RX);
184 wi = (struct mlx5e_icosq_wqe_info) {
185 .wqe_type = MLX5E_ICOSQ_WQE_SET_PSV_TLS,
186 .num_wqebbs = num_wqebbs,
187 .tls_set_params.priv_rx = priv_rx,
188 };
189
190 icosq_fill_wi(sq, pi, &wi);
191 sq->pc += num_wqebbs;
192
193 return &wqe->ctrl;
194 }
195
post_rx_param_wqes(struct mlx5e_channel * c,struct mlx5e_ktls_offload_context_rx * priv_rx,u32 next_record_tcp_sn)196 static int post_rx_param_wqes(struct mlx5e_channel *c,
197 struct mlx5e_ktls_offload_context_rx *priv_rx,
198 u32 next_record_tcp_sn)
199 {
200 struct mlx5_wqe_ctrl_seg *cseg;
201 struct mlx5e_icosq *sq;
202 int err;
203
204 err = 0;
205 sq = &c->async_icosq;
206 spin_lock_bh(&c->async_icosq_lock);
207
208 cseg = post_static_params(sq, priv_rx);
209 if (IS_ERR(cseg))
210 goto err_out;
211 cseg = post_progress_params(sq, priv_rx, next_record_tcp_sn);
212 if (IS_ERR(cseg))
213 goto err_out;
214
215 mlx5e_notify_hw(&sq->wq, sq->pc, sq->uar_map, cseg);
216 unlock:
217 spin_unlock_bh(&c->async_icosq_lock);
218
219 return err;
220
221 err_out:
222 priv_rx->rq_stats->tls_resync_req_skip++;
223 err = PTR_ERR(cseg);
224 complete(&priv_rx->add_ctx);
225 goto unlock;
226 }
227
228 static void
mlx5e_set_ktls_rx_priv_ctx(struct tls_context * tls_ctx,struct mlx5e_ktls_offload_context_rx * priv_rx)229 mlx5e_set_ktls_rx_priv_ctx(struct tls_context *tls_ctx,
230 struct mlx5e_ktls_offload_context_rx *priv_rx)
231 {
232 struct mlx5e_ktls_offload_context_rx **ctx =
233 __tls_driver_ctx(tls_ctx, TLS_OFFLOAD_CTX_DIR_RX);
234
235 BUILD_BUG_ON(sizeof(priv_rx) > TLS_DRIVER_STATE_SIZE_RX);
236
237 *ctx = priv_rx;
238 }
239
240 static struct mlx5e_ktls_offload_context_rx *
mlx5e_get_ktls_rx_priv_ctx(struct tls_context * tls_ctx)241 mlx5e_get_ktls_rx_priv_ctx(struct tls_context *tls_ctx)
242 {
243 struct mlx5e_ktls_offload_context_rx **ctx =
244 __tls_driver_ctx(tls_ctx, TLS_OFFLOAD_CTX_DIR_RX);
245
246 return *ctx;
247 }
248
249 /* Re-sync */
250 /* Runs in work context */
251 static int
resync_post_get_progress_params(struct mlx5e_icosq * sq,struct mlx5e_ktls_offload_context_rx * priv_rx)252 resync_post_get_progress_params(struct mlx5e_icosq *sq,
253 struct mlx5e_ktls_offload_context_rx *priv_rx)
254 {
255 struct mlx5e_get_tls_progress_params_wqe *wqe;
256 struct mlx5e_ktls_rx_resync_buf *buf;
257 struct mlx5e_icosq_wqe_info wi;
258 struct mlx5_wqe_ctrl_seg *cseg;
259 struct mlx5_seg_get_psv *psv;
260 struct device *pdev;
261 int err;
262 u16 pi;
263
264 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
265 if (unlikely(!buf)) {
266 err = -ENOMEM;
267 goto err_out;
268 }
269
270 pdev = mlx5_core_dma_dev(sq->channel->mdev);
271 buf->dma_addr = dma_map_single(pdev, &buf->progress,
272 PROGRESS_PARAMS_PADDED_SIZE, DMA_FROM_DEVICE);
273 if (unlikely(dma_mapping_error(pdev, buf->dma_addr))) {
274 err = -ENOMEM;
275 goto err_free;
276 }
277
278 buf->priv_rx = priv_rx;
279
280 spin_lock_bh(&sq->channel->async_icosq_lock);
281
282 if (unlikely(!mlx5e_icosq_can_post_wqe(sq, MLX5E_KTLS_GET_PROGRESS_WQEBBS))) {
283 spin_unlock_bh(&sq->channel->async_icosq_lock);
284 err = -ENOSPC;
285 goto err_dma_unmap;
286 }
287
288 pi = mlx5e_icosq_get_next_pi(sq, MLX5E_KTLS_GET_PROGRESS_WQEBBS);
289 wqe = MLX5E_TLS_FETCH_GET_PROGRESS_PARAMS_WQE(sq, pi);
290
291 #define GET_PSV_DS_CNT (DIV_ROUND_UP(sizeof(*wqe), MLX5_SEND_WQE_DS))
292
293 cseg = &wqe->ctrl;
294 cseg->opmod_idx_opcode =
295 cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_GET_PSV |
296 (MLX5_OPC_MOD_TLS_TIR_PROGRESS_PARAMS << 24));
297 cseg->qpn_ds =
298 cpu_to_be32((sq->sqn << MLX5_WQE_CTRL_QPN_SHIFT) | GET_PSV_DS_CNT);
299
300 psv = &wqe->psv;
301 psv->num_psv = 1 << 4;
302 psv->l_key = sq->channel->mkey_be;
303 psv->psv_index[0] = cpu_to_be32(mlx5e_tir_get_tirn(&priv_rx->tir));
304 psv->va = cpu_to_be64(buf->dma_addr);
305
306 wi = (struct mlx5e_icosq_wqe_info) {
307 .wqe_type = MLX5E_ICOSQ_WQE_GET_PSV_TLS,
308 .num_wqebbs = MLX5E_KTLS_GET_PROGRESS_WQEBBS,
309 .tls_get_params.buf = buf,
310 };
311 icosq_fill_wi(sq, pi, &wi);
312 sq->pc++;
313 mlx5e_notify_hw(&sq->wq, sq->pc, sq->uar_map, cseg);
314 spin_unlock_bh(&sq->channel->async_icosq_lock);
315
316 return 0;
317
318 err_dma_unmap:
319 dma_unmap_single(pdev, buf->dma_addr, PROGRESS_PARAMS_PADDED_SIZE, DMA_FROM_DEVICE);
320 err_free:
321 kfree(buf);
322 err_out:
323 priv_rx->rq_stats->tls_resync_req_skip++;
324 return err;
325 }
326
327 /* Function is called with elevated refcount.
328 * It decreases it only if no WQE is posted.
329 */
resync_handle_work(struct work_struct * work)330 static void resync_handle_work(struct work_struct *work)
331 {
332 struct mlx5e_ktls_offload_context_rx *priv_rx;
333 struct mlx5e_ktls_rx_resync_ctx *resync;
334 struct mlx5e_channel *c;
335 struct mlx5e_icosq *sq;
336
337 resync = container_of(work, struct mlx5e_ktls_rx_resync_ctx, work);
338 priv_rx = container_of(resync, struct mlx5e_ktls_offload_context_rx, resync);
339
340 if (unlikely(test_bit(MLX5E_PRIV_RX_FLAG_DELETING, priv_rx->flags))) {
341 mlx5e_ktls_priv_rx_put(priv_rx);
342 return;
343 }
344
345 c = resync->priv->channels.c[priv_rx->rxq];
346 sq = &c->async_icosq;
347
348 if (resync_post_get_progress_params(sq, priv_rx))
349 mlx5e_ktls_priv_rx_put(priv_rx);
350 }
351
resync_init(struct mlx5e_ktls_rx_resync_ctx * resync,struct mlx5e_priv * priv)352 static void resync_init(struct mlx5e_ktls_rx_resync_ctx *resync,
353 struct mlx5e_priv *priv)
354 {
355 INIT_WORK(&resync->work, resync_handle_work);
356 resync->priv = priv;
357 refcount_set(&resync->refcnt, 1);
358 }
359
360 /* Function can be called with the refcount being either elevated or not.
361 * It does not affect the refcount.
362 */
resync_handle_seq_match(struct mlx5e_ktls_offload_context_rx * priv_rx,struct mlx5e_channel * c)363 static void resync_handle_seq_match(struct mlx5e_ktls_offload_context_rx *priv_rx,
364 struct mlx5e_channel *c)
365 {
366 struct mlx5e_ktls_resync_resp *ktls_resync;
367 struct mlx5e_icosq *sq;
368 bool trigger_poll;
369
370 sq = &c->async_icosq;
371 ktls_resync = sq->ktls_resync;
372 trigger_poll = false;
373
374 spin_lock_bh(&ktls_resync->lock);
375 spin_lock_bh(&priv_rx->lock);
376 switch (priv_rx->crypto_info.crypto_info.cipher_type) {
377 case TLS_CIPHER_AES_GCM_128: {
378 struct tls12_crypto_info_aes_gcm_128 *info =
379 &priv_rx->crypto_info.crypto_info_128;
380
381 memcpy(info->rec_seq, &priv_rx->resync.sw_rcd_sn_be,
382 sizeof(info->rec_seq));
383 break;
384 }
385 case TLS_CIPHER_AES_GCM_256: {
386 struct tls12_crypto_info_aes_gcm_256 *info =
387 &priv_rx->crypto_info.crypto_info_256;
388
389 memcpy(info->rec_seq, &priv_rx->resync.sw_rcd_sn_be,
390 sizeof(info->rec_seq));
391 break;
392 }
393 default:
394 WARN_ONCE(1, "Unsupported cipher type %u\n",
395 priv_rx->crypto_info.crypto_info.cipher_type);
396 spin_unlock_bh(&priv_rx->lock);
397 spin_unlock_bh(&ktls_resync->lock);
398 return;
399 }
400
401 if (list_empty(&priv_rx->list)) {
402 list_add_tail(&priv_rx->list, &ktls_resync->list);
403 trigger_poll = !test_and_set_bit(MLX5E_SQ_STATE_PENDING_TLS_RX_RESYNC, &sq->state);
404 }
405 spin_unlock_bh(&priv_rx->lock);
406 spin_unlock_bh(&ktls_resync->lock);
407
408 if (!trigger_poll)
409 return;
410
411 if (!napi_if_scheduled_mark_missed(&c->napi)) {
412 spin_lock_bh(&c->async_icosq_lock);
413 mlx5e_trigger_irq(sq);
414 spin_unlock_bh(&c->async_icosq_lock);
415 }
416 }
417
418 /* Function can be called with the refcount being either elevated or not.
419 * It decreases the refcount and may free the kTLS priv context.
420 * Refcount is not elevated only if tls_dev_del has been called, but GET_PSV was
421 * already in flight.
422 */
mlx5e_ktls_handle_get_psv_completion(struct mlx5e_icosq_wqe_info * wi,struct mlx5e_icosq * sq)423 void mlx5e_ktls_handle_get_psv_completion(struct mlx5e_icosq_wqe_info *wi,
424 struct mlx5e_icosq *sq)
425 {
426 struct mlx5e_ktls_rx_resync_buf *buf = wi->tls_get_params.buf;
427 struct mlx5e_ktls_offload_context_rx *priv_rx;
428 u8 tracker_state, auth_state, *ctx;
429 struct device *dev;
430 u32 hw_seq;
431
432 priv_rx = buf->priv_rx;
433 dev = mlx5_core_dma_dev(sq->channel->mdev);
434 if (unlikely(test_bit(MLX5E_PRIV_RX_FLAG_DELETING, priv_rx->flags)))
435 goto out;
436
437 dma_sync_single_for_cpu(dev, buf->dma_addr, PROGRESS_PARAMS_PADDED_SIZE,
438 DMA_FROM_DEVICE);
439
440 ctx = buf->progress.ctx;
441 tracker_state = MLX5_GET(tls_progress_params, ctx, record_tracker_state);
442 auth_state = MLX5_GET(tls_progress_params, ctx, auth_state);
443 if (tracker_state != MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_TRACKING ||
444 auth_state != MLX5E_TLS_PROGRESS_PARAMS_AUTH_STATE_NO_OFFLOAD) {
445 priv_rx->rq_stats->tls_resync_req_skip++;
446 goto out;
447 }
448
449 hw_seq = MLX5_GET(tls_progress_params, ctx, hw_resync_tcp_sn);
450 tls_offload_rx_resync_async_request_end(priv_rx->sk, cpu_to_be32(hw_seq));
451 priv_rx->rq_stats->tls_resync_req_end++;
452 out:
453 mlx5e_ktls_priv_rx_put(priv_rx);
454 dma_unmap_single(dev, buf->dma_addr, PROGRESS_PARAMS_PADDED_SIZE, DMA_FROM_DEVICE);
455 kfree(buf);
456 }
457
458 /* Runs in NAPI.
459 * Function elevates the refcount, unless no work is queued.
460 */
resync_queue_get_psv(struct sock * sk)461 static bool resync_queue_get_psv(struct sock *sk)
462 {
463 struct mlx5e_ktls_offload_context_rx *priv_rx;
464 struct mlx5e_ktls_rx_resync_ctx *resync;
465
466 priv_rx = mlx5e_get_ktls_rx_priv_ctx(tls_get_ctx(sk));
467 if (unlikely(!priv_rx))
468 return false;
469
470 if (unlikely(test_bit(MLX5E_PRIV_RX_FLAG_DELETING, priv_rx->flags)))
471 return false;
472
473 resync = &priv_rx->resync;
474 mlx5e_ktls_priv_rx_get(priv_rx);
475 if (unlikely(!queue_work(resync->priv->tls->rx_wq, &resync->work)))
476 mlx5e_ktls_priv_rx_put(priv_rx);
477
478 return true;
479 }
480
481 /* Runs in NAPI */
resync_update_sn(struct mlx5e_rq * rq,struct sk_buff * skb)482 static void resync_update_sn(struct mlx5e_rq *rq, struct sk_buff *skb)
483 {
484 struct ethhdr *eth = (struct ethhdr *)(skb->data);
485 struct net_device *netdev = rq->netdev;
486 struct net *net = dev_net(netdev);
487 struct sock *sk = NULL;
488 unsigned int datalen;
489 struct iphdr *iph;
490 struct tcphdr *th;
491 __be32 seq;
492 int depth = 0;
493
494 __vlan_get_protocol(skb, eth->h_proto, &depth);
495 iph = (struct iphdr *)(skb->data + depth);
496
497 if (iph->version == 4) {
498 depth += sizeof(struct iphdr);
499 th = (void *)iph + sizeof(struct iphdr);
500
501 sk = inet_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
502 iph->saddr, th->source, iph->daddr,
503 th->dest, netdev->ifindex);
504 #if IS_ENABLED(CONFIG_IPV6)
505 } else {
506 struct ipv6hdr *ipv6h = (struct ipv6hdr *)iph;
507
508 depth += sizeof(struct ipv6hdr);
509 th = (void *)ipv6h + sizeof(struct ipv6hdr);
510
511 sk = __inet6_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
512 &ipv6h->saddr, th->source,
513 &ipv6h->daddr, ntohs(th->dest),
514 netdev->ifindex, 0);
515 #endif
516 }
517
518 depth += sizeof(struct tcphdr);
519
520 if (unlikely(!sk))
521 return;
522
523 if (unlikely(sk->sk_state == TCP_TIME_WAIT))
524 goto unref;
525
526 if (unlikely(!resync_queue_get_psv(sk)))
527 goto unref;
528
529 seq = th->seq;
530 datalen = skb->len - depth;
531 tls_offload_rx_resync_async_request_start(sk, seq, datalen);
532 rq->stats->tls_resync_req_start++;
533
534 unref:
535 sock_gen_put(sk);
536 }
537
mlx5e_ktls_rx_resync(struct net_device * netdev,struct sock * sk,u32 seq,u8 * rcd_sn)538 void mlx5e_ktls_rx_resync(struct net_device *netdev, struct sock *sk,
539 u32 seq, u8 *rcd_sn)
540 {
541 struct mlx5e_ktls_offload_context_rx *priv_rx;
542 struct mlx5e_ktls_rx_resync_ctx *resync;
543 struct mlx5e_priv *priv;
544 struct mlx5e_channel *c;
545
546 priv_rx = mlx5e_get_ktls_rx_priv_ctx(tls_get_ctx(sk));
547 if (unlikely(!priv_rx))
548 return;
549
550 resync = &priv_rx->resync;
551 resync->sw_rcd_sn_be = *(__be64 *)rcd_sn;
552 resync->seq = seq;
553
554 priv = netdev_priv(netdev);
555 c = priv->channels.c[priv_rx->rxq];
556
557 resync_handle_seq_match(priv_rx, c);
558 }
559
560 /* End of resync section */
561
mlx5e_ktls_handle_rx_skb(struct mlx5e_rq * rq,struct sk_buff * skb,struct mlx5_cqe64 * cqe,u32 * cqe_bcnt)562 void mlx5e_ktls_handle_rx_skb(struct mlx5e_rq *rq, struct sk_buff *skb,
563 struct mlx5_cqe64 *cqe, u32 *cqe_bcnt)
564 {
565 struct mlx5e_rq_stats *stats = rq->stats;
566
567 switch (get_cqe_tls_offload(cqe)) {
568 case CQE_TLS_OFFLOAD_DECRYPTED:
569 skb->decrypted = 1;
570 stats->tls_decrypted_packets++;
571 stats->tls_decrypted_bytes += *cqe_bcnt;
572 break;
573 case CQE_TLS_OFFLOAD_RESYNC:
574 stats->tls_resync_req_pkt++;
575 resync_update_sn(rq, skb);
576 break;
577 default: /* CQE_TLS_OFFLOAD_ERROR: */
578 stats->tls_err++;
579 break;
580 }
581 }
582
mlx5e_ktls_handle_ctx_completion(struct mlx5e_icosq_wqe_info * wi)583 void mlx5e_ktls_handle_ctx_completion(struct mlx5e_icosq_wqe_info *wi)
584 {
585 struct mlx5e_ktls_offload_context_rx *priv_rx = wi->tls_set_params.priv_rx;
586 struct accel_rule *rule = &priv_rx->rule;
587
588 if (unlikely(test_bit(MLX5E_PRIV_RX_FLAG_DELETING, priv_rx->flags))) {
589 complete(&priv_rx->add_ctx);
590 return;
591 }
592 queue_work(rule->priv->tls->rx_wq, &rule->work);
593 }
594
mlx5e_ktls_sk_get_rxq(struct sock * sk)595 static int mlx5e_ktls_sk_get_rxq(struct sock *sk)
596 {
597 int rxq = sk_rx_queue_get(sk);
598
599 if (unlikely(rxq == -1))
600 rxq = 0;
601
602 return rxq;
603 }
604
mlx5e_ktls_add_rx(struct net_device * netdev,struct sock * sk,struct tls_crypto_info * crypto_info,u32 start_offload_tcp_sn)605 int mlx5e_ktls_add_rx(struct net_device *netdev, struct sock *sk,
606 struct tls_crypto_info *crypto_info,
607 u32 start_offload_tcp_sn)
608 {
609 struct mlx5e_ktls_offload_context_rx *priv_rx;
610 struct mlx5e_ktls_rx_resync_ctx *resync;
611 struct tls_context *tls_ctx;
612 struct mlx5_crypto_dek *dek;
613 struct mlx5e_priv *priv;
614 int rxq, err;
615
616 tls_ctx = tls_get_ctx(sk);
617 priv = netdev_priv(netdev);
618 priv_rx = kzalloc(sizeof(*priv_rx), GFP_KERNEL);
619 if (unlikely(!priv_rx))
620 return -ENOMEM;
621
622 switch (crypto_info->cipher_type) {
623 case TLS_CIPHER_AES_GCM_128:
624 priv_rx->crypto_info.crypto_info_128 =
625 *(struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
626 break;
627 case TLS_CIPHER_AES_GCM_256:
628 priv_rx->crypto_info.crypto_info_256 =
629 *(struct tls12_crypto_info_aes_gcm_256 *)crypto_info;
630 break;
631 default:
632 WARN_ONCE(1, "Unsupported cipher type %u\n",
633 crypto_info->cipher_type);
634 err = -EOPNOTSUPP;
635 goto err_cipher_type;
636 }
637
638 dek = mlx5_ktls_create_key(priv->tls->dek_pool, crypto_info);
639 if (IS_ERR(dek)) {
640 err = PTR_ERR(dek);
641 goto err_cipher_type;
642 }
643 priv_rx->dek = dek;
644
645 INIT_LIST_HEAD(&priv_rx->list);
646 spin_lock_init(&priv_rx->lock);
647
648 rxq = mlx5e_ktls_sk_get_rxq(sk);
649 priv_rx->rxq = rxq;
650 priv_rx->sk = sk;
651
652 priv_rx->rq_stats = &priv->channel_stats[rxq]->rq;
653 priv_rx->sw_stats = &priv->tls->sw_stats;
654 mlx5e_set_ktls_rx_priv_ctx(tls_ctx, priv_rx);
655
656 err = mlx5e_rx_res_tls_tir_create(priv->rx_res, rxq, &priv_rx->tir);
657 if (err)
658 goto err_create_tir;
659
660 init_completion(&priv_rx->add_ctx);
661
662 accel_rule_init(&priv_rx->rule, priv);
663 resync = &priv_rx->resync;
664 resync_init(resync, priv);
665 tls_offload_ctx_rx(tls_ctx)->resync_async = &resync->core;
666 tls_offload_rx_resync_set_type(sk, TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC);
667
668 err = post_rx_param_wqes(priv->channels.c[rxq], priv_rx, start_offload_tcp_sn);
669 if (err)
670 goto err_post_wqes;
671
672 atomic64_inc(&priv_rx->sw_stats->rx_tls_ctx);
673
674 return 0;
675
676 err_post_wqes:
677 mlx5e_tir_destroy(&priv_rx->tir);
678 err_create_tir:
679 mlx5_ktls_destroy_key(priv->tls->dek_pool, priv_rx->dek);
680 err_cipher_type:
681 kfree(priv_rx);
682 return err;
683 }
684
mlx5e_ktls_del_rx(struct net_device * netdev,struct tls_context * tls_ctx)685 void mlx5e_ktls_del_rx(struct net_device *netdev, struct tls_context *tls_ctx)
686 {
687 struct mlx5e_ktls_offload_context_rx *priv_rx;
688 struct mlx5e_ktls_rx_resync_ctx *resync;
689 struct mlx5e_priv *priv;
690
691 priv = netdev_priv(netdev);
692
693 priv_rx = mlx5e_get_ktls_rx_priv_ctx(tls_ctx);
694 set_bit(MLX5E_PRIV_RX_FLAG_DELETING, priv_rx->flags);
695 mlx5e_set_ktls_rx_priv_ctx(tls_ctx, NULL);
696 synchronize_net(); /* Sync with NAPI */
697 if (!cancel_work_sync(&priv_rx->rule.work))
698 /* completion is needed, as the priv_rx in the add flow
699 * is maintained on the wqe info (wi), not on the socket.
700 */
701 wait_for_completion(&priv_rx->add_ctx);
702 resync = &priv_rx->resync;
703 if (cancel_work_sync(&resync->work))
704 mlx5e_ktls_priv_rx_put(priv_rx);
705
706 atomic64_inc(&priv_rx->sw_stats->rx_tls_del);
707 if (priv_rx->rule.rule)
708 mlx5e_accel_fs_del_sk(priv_rx->rule.rule);
709
710 mlx5e_tir_destroy(&priv_rx->tir);
711 mlx5_ktls_destroy_key(priv->tls->dek_pool, priv_rx->dek);
712 /* priv_rx should normally be freed here, but if there is an outstanding
713 * GET_PSV, deallocation will be delayed until the CQE for GET_PSV is
714 * processed.
715 */
716 mlx5e_ktls_priv_rx_put(priv_rx);
717 }
718
mlx5e_ktls_rx_handle_resync_list(struct mlx5e_channel * c,int budget)719 bool mlx5e_ktls_rx_handle_resync_list(struct mlx5e_channel *c, int budget)
720 {
721 struct mlx5e_ktls_offload_context_rx *priv_rx, *tmp;
722 struct mlx5e_ktls_resync_resp *ktls_resync;
723 struct mlx5_wqe_ctrl_seg *db_cseg;
724 struct mlx5e_icosq *sq;
725 LIST_HEAD(local_list);
726 int i, j;
727
728 sq = &c->async_icosq;
729
730 if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
731 return false;
732
733 ktls_resync = sq->ktls_resync;
734 db_cseg = NULL;
735 i = 0;
736
737 spin_lock(&ktls_resync->lock);
738 list_for_each_entry_safe(priv_rx, tmp, &ktls_resync->list, list) {
739 list_move(&priv_rx->list, &local_list);
740 if (++i == budget)
741 break;
742 }
743 if (list_empty(&ktls_resync->list))
744 clear_bit(MLX5E_SQ_STATE_PENDING_TLS_RX_RESYNC, &sq->state);
745 spin_unlock(&ktls_resync->lock);
746
747 spin_lock(&c->async_icosq_lock);
748 for (j = 0; j < i; j++) {
749 struct mlx5_wqe_ctrl_seg *cseg;
750
751 priv_rx = list_first_entry(&local_list,
752 struct mlx5e_ktls_offload_context_rx,
753 list);
754 spin_lock(&priv_rx->lock);
755 cseg = post_static_params(sq, priv_rx);
756 if (IS_ERR(cseg)) {
757 spin_unlock(&priv_rx->lock);
758 break;
759 }
760 list_del_init(&priv_rx->list);
761 spin_unlock(&priv_rx->lock);
762 db_cseg = cseg;
763 }
764 if (db_cseg)
765 mlx5e_notify_hw(&sq->wq, sq->pc, sq->uar_map, db_cseg);
766 spin_unlock(&c->async_icosq_lock);
767
768 priv_rx->rq_stats->tls_resync_res_ok += j;
769
770 if (!list_empty(&local_list)) {
771 /* This happens only if ICOSQ is full.
772 * There is no need to mark busy or explicitly ask for a NAPI cycle,
773 * it will be triggered by the outstanding ICOSQ completions.
774 */
775 spin_lock(&ktls_resync->lock);
776 list_splice(&local_list, &ktls_resync->list);
777 set_bit(MLX5E_SQ_STATE_PENDING_TLS_RX_RESYNC, &sq->state);
778 spin_unlock(&ktls_resync->lock);
779 priv_rx->rq_stats->tls_resync_res_retry++;
780 }
781
782 return i == budget;
783 }
784