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1// SPDX-License-Identifier: GPL-2.0-only
2/* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */
3
4#include <linux/kernel.h>
5#include <linux/io.h>
6#include <linux/iopoll.h>
7#include <linux/etherdevice.h>
8#include <linux/platform_device.h>
9#include <linux/if_ether.h>
10#include <linux/if_vlan.h>
11#include <net/dsa.h>
12#include "mtk_eth_soc.h"
13#include "mtk_ppe.h"
14#include "mtk_ppe_regs.h"
15
16static DEFINE_SPINLOCK(ppe_lock);
17
18static const struct rhashtable_params mtk_flow_l2_ht_params = {
19 .head_offset = offsetof(struct mtk_flow_entry, l2_node),
20 .key_offset = offsetof(struct mtk_flow_entry, data.bridge),
21 .key_len = offsetof(struct mtk_foe_bridge, key_end),
22 .automatic_shrinking = true,
23};
24
25static void ppe_w32(struct mtk_ppe *ppe, u32 reg, u32 val)
26{
27 writel(val, ppe->base + reg);
28}
29
30static u32 ppe_r32(struct mtk_ppe *ppe, u32 reg)
31{
32 return readl(ppe->base + reg);
33}
34
35static u32 ppe_m32(struct mtk_ppe *ppe, u32 reg, u32 mask, u32 set)
36{
37 u32 val;
38
39 val = ppe_r32(ppe, reg);
40 val &= ~mask;
41 val |= set;
42 ppe_w32(ppe, reg, val);
43
44 return val;
45}
46
47static u32 ppe_set(struct mtk_ppe *ppe, u32 reg, u32 val)
48{
49 return ppe_m32(ppe, reg, 0, val);
50}
51
52static u32 ppe_clear(struct mtk_ppe *ppe, u32 reg, u32 val)
53{
54 return ppe_m32(ppe, reg, val, 0);
55}
56
57static u32 mtk_eth_timestamp(struct mtk_eth *eth)
58{
59 return mtk_r32(eth, 0x0010) & mtk_get_ib1_ts_mask(eth);
60}
61
62static int mtk_ppe_wait_busy(struct mtk_ppe *ppe)
63{
64 int ret;
65 u32 val;
66
67 ret = readl_poll_timeout(ppe->base + MTK_PPE_GLO_CFG, val,
68 !(val & MTK_PPE_GLO_CFG_BUSY),
69 20, MTK_PPE_WAIT_TIMEOUT_US);
70
71 if (ret)
72 dev_err(ppe->dev, "PPE table busy");
73
74 return ret;
75}
76
77static void mtk_ppe_cache_clear(struct mtk_ppe *ppe)
78{
79 ppe_set(ppe, MTK_PPE_CACHE_CTL, MTK_PPE_CACHE_CTL_CLEAR);
80 ppe_clear(ppe, MTK_PPE_CACHE_CTL, MTK_PPE_CACHE_CTL_CLEAR);
81}
82
83static void mtk_ppe_cache_enable(struct mtk_ppe *ppe, bool enable)
84{
85 mtk_ppe_cache_clear(ppe);
86
87 ppe_m32(ppe, MTK_PPE_CACHE_CTL, MTK_PPE_CACHE_CTL_EN,
88 enable * MTK_PPE_CACHE_CTL_EN);
89}
90
91static u32 mtk_ppe_hash_entry(struct mtk_eth *eth, struct mtk_foe_entry *e)
92{
93 u32 hv1, hv2, hv3;
94 u32 hash;
95
96 switch (mtk_get_ib1_pkt_type(eth, e->ib1)) {
97 case MTK_PPE_PKT_TYPE_IPV4_ROUTE:
98 case MTK_PPE_PKT_TYPE_IPV4_HNAPT:
99 hv1 = e->ipv4.orig.ports;
100 hv2 = e->ipv4.orig.dest_ip;
101 hv3 = e->ipv4.orig.src_ip;
102 break;
103 case MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T:
104 case MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T:
105 hv1 = e->ipv6.src_ip[3] ^ e->ipv6.dest_ip[3];
106 hv1 ^= e->ipv6.ports;
107
108 hv2 = e->ipv6.src_ip[2] ^ e->ipv6.dest_ip[2];
109 hv2 ^= e->ipv6.dest_ip[0];
110
111 hv3 = e->ipv6.src_ip[1] ^ e->ipv6.dest_ip[1];
112 hv3 ^= e->ipv6.src_ip[0];
113 break;
114 case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
115 case MTK_PPE_PKT_TYPE_IPV6_6RD:
116 default:
117 WARN_ON_ONCE(1);
118 return MTK_PPE_HASH_MASK;
119 }
120
121 hash = (hv1 & hv2) | ((~hv1) & hv3);
122 hash = (hash >> 24) | ((hash & 0xffffff) << 8);
123 hash ^= hv1 ^ hv2 ^ hv3;
124 hash ^= hash >> 16;
125 hash <<= (ffs(eth->soc->hash_offset) - 1);
126 hash &= MTK_PPE_ENTRIES - 1;
127
128 return hash;
129}
130
131static inline struct mtk_foe_mac_info *
132mtk_foe_entry_l2(struct mtk_eth *eth, struct mtk_foe_entry *entry)
133{
134 int type = mtk_get_ib1_pkt_type(eth, entry->ib1);
135
136 if (type == MTK_PPE_PKT_TYPE_BRIDGE)
137 return &entry->bridge.l2;
138
139 if (type >= MTK_PPE_PKT_TYPE_IPV4_DSLITE)
140 return &entry->ipv6.l2;
141
142 return &entry->ipv4.l2;
143}
144
145static inline u32 *
146mtk_foe_entry_ib2(struct mtk_eth *eth, struct mtk_foe_entry *entry)
147{
148 int type = mtk_get_ib1_pkt_type(eth, entry->ib1);
149
150 if (type == MTK_PPE_PKT_TYPE_BRIDGE)
151 return &entry->bridge.ib2;
152
153 if (type >= MTK_PPE_PKT_TYPE_IPV4_DSLITE)
154 return &entry->ipv6.ib2;
155
156 return &entry->ipv4.ib2;
157}
158
159int mtk_foe_entry_prepare(struct mtk_eth *eth, struct mtk_foe_entry *entry,
160 int type, int l4proto, u8 pse_port, u8 *src_mac,
161 u8 *dest_mac)
162{
163 struct mtk_foe_mac_info *l2;
164 u32 ports_pad, val;
165
166 memset(entry, 0, sizeof(*entry));
167
168 if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
169 val = FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_BIND) |
170 FIELD_PREP(MTK_FOE_IB1_PACKET_TYPE_V2, type) |
171 FIELD_PREP(MTK_FOE_IB1_UDP, l4proto == IPPROTO_UDP) |
172 MTK_FOE_IB1_BIND_CACHE_V2 | MTK_FOE_IB1_BIND_TTL_V2;
173 entry->ib1 = val;
174
175 val = FIELD_PREP(MTK_FOE_IB2_DEST_PORT_V2, pse_port) |
176 FIELD_PREP(MTK_FOE_IB2_PORT_AG_V2, 0xf);
177 } else {
178 int port_mg = eth->soc->offload_version > 1 ? 0 : 0x3f;
179
180 val = FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_BIND) |
181 FIELD_PREP(MTK_FOE_IB1_PACKET_TYPE, type) |
182 FIELD_PREP(MTK_FOE_IB1_UDP, l4proto == IPPROTO_UDP) |
183 MTK_FOE_IB1_BIND_CACHE | MTK_FOE_IB1_BIND_TTL;
184 entry->ib1 = val;
185
186 val = FIELD_PREP(MTK_FOE_IB2_DEST_PORT, pse_port) |
187 FIELD_PREP(MTK_FOE_IB2_PORT_MG, port_mg) |
188 FIELD_PREP(MTK_FOE_IB2_PORT_AG, 0x1f);
189 }
190
191 if (is_multicast_ether_addr(dest_mac))
192 val |= mtk_get_ib2_multicast_mask(eth);
193
194 ports_pad = 0xa5a5a500 | (l4proto & 0xff);
195 if (type == MTK_PPE_PKT_TYPE_IPV4_ROUTE)
196 entry->ipv4.orig.ports = ports_pad;
197 if (type == MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T)
198 entry->ipv6.ports = ports_pad;
199
200 if (type == MTK_PPE_PKT_TYPE_BRIDGE) {
201 ether_addr_copy(entry->bridge.src_mac, src_mac);
202 ether_addr_copy(entry->bridge.dest_mac, dest_mac);
203 entry->bridge.ib2 = val;
204 l2 = &entry->bridge.l2;
205 } else if (type >= MTK_PPE_PKT_TYPE_IPV4_DSLITE) {
206 entry->ipv6.ib2 = val;
207 l2 = &entry->ipv6.l2;
208 } else {
209 entry->ipv4.ib2 = val;
210 l2 = &entry->ipv4.l2;
211 }
212
213 l2->dest_mac_hi = get_unaligned_be32(dest_mac);
214 l2->dest_mac_lo = get_unaligned_be16(dest_mac + 4);
215 l2->src_mac_hi = get_unaligned_be32(src_mac);
216 l2->src_mac_lo = get_unaligned_be16(src_mac + 4);
217
218 if (type >= MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T)
219 l2->etype = ETH_P_IPV6;
220 else
221 l2->etype = ETH_P_IP;
222
223 return 0;
224}
225
226int mtk_foe_entry_set_pse_port(struct mtk_eth *eth,
227 struct mtk_foe_entry *entry, u8 port)
228{
229 u32 *ib2 = mtk_foe_entry_ib2(eth, entry);
230 u32 val = *ib2;
231
232 if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
233 val &= ~MTK_FOE_IB2_DEST_PORT_V2;
234 val |= FIELD_PREP(MTK_FOE_IB2_DEST_PORT_V2, port);
235 } else {
236 val &= ~MTK_FOE_IB2_DEST_PORT;
237 val |= FIELD_PREP(MTK_FOE_IB2_DEST_PORT, port);
238 }
239 *ib2 = val;
240
241 return 0;
242}
243
244int mtk_foe_entry_set_ipv4_tuple(struct mtk_eth *eth,
245 struct mtk_foe_entry *entry, bool egress,
246 __be32 src_addr, __be16 src_port,
247 __be32 dest_addr, __be16 dest_port)
248{
249 int type = mtk_get_ib1_pkt_type(eth, entry->ib1);
250 struct mtk_ipv4_tuple *t;
251
252 switch (type) {
253 case MTK_PPE_PKT_TYPE_IPV4_HNAPT:
254 if (egress) {
255 t = &entry->ipv4.new;
256 break;
257 }
258 fallthrough;
259 case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
260 case MTK_PPE_PKT_TYPE_IPV4_ROUTE:
261 t = &entry->ipv4.orig;
262 break;
263 case MTK_PPE_PKT_TYPE_IPV6_6RD:
264 entry->ipv6_6rd.tunnel_src_ip = be32_to_cpu(src_addr);
265 entry->ipv6_6rd.tunnel_dest_ip = be32_to_cpu(dest_addr);
266 return 0;
267 default:
268 WARN_ON_ONCE(1);
269 return -EINVAL;
270 }
271
272 t->src_ip = be32_to_cpu(src_addr);
273 t->dest_ip = be32_to_cpu(dest_addr);
274
275 if (type == MTK_PPE_PKT_TYPE_IPV4_ROUTE)
276 return 0;
277
278 t->src_port = be16_to_cpu(src_port);
279 t->dest_port = be16_to_cpu(dest_port);
280
281 return 0;
282}
283
284int mtk_foe_entry_set_ipv6_tuple(struct mtk_eth *eth,
285 struct mtk_foe_entry *entry,
286 __be32 *src_addr, __be16 src_port,
287 __be32 *dest_addr, __be16 dest_port)
288{
289 int type = mtk_get_ib1_pkt_type(eth, entry->ib1);
290 u32 *src, *dest;
291 int i;
292
293 switch (type) {
294 case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
295 src = entry->dslite.tunnel_src_ip;
296 dest = entry->dslite.tunnel_dest_ip;
297 break;
298 case MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T:
299 case MTK_PPE_PKT_TYPE_IPV6_6RD:
300 entry->ipv6.src_port = be16_to_cpu(src_port);
301 entry->ipv6.dest_port = be16_to_cpu(dest_port);
302 fallthrough;
303 case MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T:
304 src = entry->ipv6.src_ip;
305 dest = entry->ipv6.dest_ip;
306 break;
307 default:
308 WARN_ON_ONCE(1);
309 return -EINVAL;
310 }
311
312 for (i = 0; i < 4; i++)
313 src[i] = be32_to_cpu(src_addr[i]);
314 for (i = 0; i < 4; i++)
315 dest[i] = be32_to_cpu(dest_addr[i]);
316
317 return 0;
318}
319
320int mtk_foe_entry_set_dsa(struct mtk_eth *eth, struct mtk_foe_entry *entry,
321 int port)
322{
323 struct mtk_foe_mac_info *l2 = mtk_foe_entry_l2(eth, entry);
324
325 l2->etype = BIT(port);
326
327 if (!(entry->ib1 & mtk_get_ib1_vlan_layer_mask(eth)))
328 entry->ib1 |= mtk_prep_ib1_vlan_layer(eth, 1);
329 else
330 l2->etype |= BIT(8);
331
332 entry->ib1 &= ~mtk_get_ib1_vlan_tag_mask(eth);
333
334 return 0;
335}
336
337int mtk_foe_entry_set_vlan(struct mtk_eth *eth, struct mtk_foe_entry *entry,
338 int vid)
339{
340 struct mtk_foe_mac_info *l2 = mtk_foe_entry_l2(eth, entry);
341
342 switch (mtk_get_ib1_vlan_layer(eth, entry->ib1)) {
343 case 0:
344 entry->ib1 |= mtk_get_ib1_vlan_tag_mask(eth) |
345 mtk_prep_ib1_vlan_layer(eth, 1);
346 l2->vlan1 = vid;
347 return 0;
348 case 1:
349 if (!(entry->ib1 & mtk_get_ib1_vlan_tag_mask(eth))) {
350 l2->vlan1 = vid;
351 l2->etype |= BIT(8);
352 } else {
353 l2->vlan2 = vid;
354 entry->ib1 += mtk_prep_ib1_vlan_layer(eth, 1);
355 }
356 return 0;
357 default:
358 return -ENOSPC;
359 }
360}
361
362int mtk_foe_entry_set_pppoe(struct mtk_eth *eth, struct mtk_foe_entry *entry,
363 int sid)
364{
365 struct mtk_foe_mac_info *l2 = mtk_foe_entry_l2(eth, entry);
366
367 if (!(entry->ib1 & mtk_get_ib1_vlan_layer_mask(eth)) ||
368 (entry->ib1 & mtk_get_ib1_vlan_tag_mask(eth)))
369 l2->etype = ETH_P_PPP_SES;
370
371 entry->ib1 |= mtk_get_ib1_ppoe_mask(eth);
372 l2->pppoe_id = sid;
373
374 return 0;
375}
376
377int mtk_foe_entry_set_wdma(struct mtk_eth *eth, struct mtk_foe_entry *entry,
378 int wdma_idx, int txq, int bss, int wcid)
379{
380 struct mtk_foe_mac_info *l2 = mtk_foe_entry_l2(eth, entry);
381 u32 *ib2 = mtk_foe_entry_ib2(eth, entry);
382
383 if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
384 *ib2 &= ~MTK_FOE_IB2_PORT_MG_V2;
385 *ib2 |= FIELD_PREP(MTK_FOE_IB2_RX_IDX, txq) |
386 MTK_FOE_IB2_WDMA_WINFO_V2;
387 l2->winfo = FIELD_PREP(MTK_FOE_WINFO_WCID, wcid) |
388 FIELD_PREP(MTK_FOE_WINFO_BSS, bss);
389 } else {
390 *ib2 &= ~MTK_FOE_IB2_PORT_MG;
391 *ib2 |= MTK_FOE_IB2_WDMA_WINFO;
392 if (wdma_idx)
393 *ib2 |= MTK_FOE_IB2_WDMA_DEVIDX;
394 l2->vlan2 = FIELD_PREP(MTK_FOE_VLAN2_WINFO_BSS, bss) |
395 FIELD_PREP(MTK_FOE_VLAN2_WINFO_WCID, wcid) |
396 FIELD_PREP(MTK_FOE_VLAN2_WINFO_RING, txq);
397 }
398
399 return 0;
400}
401
402int mtk_foe_entry_set_queue(struct mtk_eth *eth, struct mtk_foe_entry *entry,
403 unsigned int queue)
404{
405 u32 *ib2 = mtk_foe_entry_ib2(eth, entry);
406
407 if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
408 *ib2 &= ~MTK_FOE_IB2_QID_V2;
409 *ib2 |= FIELD_PREP(MTK_FOE_IB2_QID_V2, queue);
410 *ib2 |= MTK_FOE_IB2_PSE_QOS_V2;
411 } else {
412 *ib2 &= ~MTK_FOE_IB2_QID;
413 *ib2 |= FIELD_PREP(MTK_FOE_IB2_QID, queue);
414 *ib2 |= MTK_FOE_IB2_PSE_QOS;
415 }
416
417 return 0;
418}
419
420static bool
421mtk_flow_entry_match(struct mtk_eth *eth, struct mtk_flow_entry *entry,
422 struct mtk_foe_entry *data)
423{
424 int type, len;
425
426 if ((data->ib1 ^ entry->data.ib1) & MTK_FOE_IB1_UDP)
427 return false;
428
429 type = mtk_get_ib1_pkt_type(eth, entry->data.ib1);
430 if (type > MTK_PPE_PKT_TYPE_IPV4_DSLITE)
431 len = offsetof(struct mtk_foe_entry, ipv6._rsv);
432 else
433 len = offsetof(struct mtk_foe_entry, ipv4.ib2);
434
435 return !memcmp(&entry->data.data, &data->data, len - 4);
436}
437
438static void
439__mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
440{
441 struct hlist_head *head;
442 struct hlist_node *tmp;
443
444 if (entry->type == MTK_FLOW_TYPE_L2) {
445 rhashtable_remove_fast(&ppe->l2_flows, &entry->l2_node,
446 mtk_flow_l2_ht_params);
447
448 head = &entry->l2_flows;
449 hlist_for_each_entry_safe(entry, tmp, head, l2_data.list)
450 __mtk_foe_entry_clear(ppe, entry);
451 return;
452 }
453
454 hlist_del_init(&entry->list);
455 if (entry->hash != 0xffff) {
456 struct mtk_foe_entry *hwe = mtk_foe_get_entry(ppe, entry->hash);
457
458 hwe->ib1 &= ~MTK_FOE_IB1_STATE;
459 hwe->ib1 |= FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_INVALID);
460 dma_wmb();
461 }
462 entry->hash = 0xffff;
463
464 if (entry->type != MTK_FLOW_TYPE_L2_SUBFLOW)
465 return;
466
467 hlist_del_init(&entry->l2_data.list);
468 kfree(entry);
469}
470
471static int __mtk_foe_entry_idle_time(struct mtk_ppe *ppe, u32 ib1)
472{
473 u32 ib1_ts_mask = mtk_get_ib1_ts_mask(ppe->eth);
474 u16 now = mtk_eth_timestamp(ppe->eth);
475 u16 timestamp = ib1 & ib1_ts_mask;
476
477 if (timestamp > now)
478 return ib1_ts_mask + 1 - timestamp + now;
479 else
480 return now - timestamp;
481}
482
483static void
484mtk_flow_entry_update_l2(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
485{
486 u32 ib1_ts_mask = mtk_get_ib1_ts_mask(ppe->eth);
487 struct mtk_flow_entry *cur;
488 struct mtk_foe_entry *hwe;
489 struct hlist_node *tmp;
490 int idle;
491
492 idle = __mtk_foe_entry_idle_time(ppe, entry->data.ib1);
493 hlist_for_each_entry_safe(cur, tmp, &entry->l2_flows, l2_data.list) {
494 int cur_idle;
495 u32 ib1;
496
497 hwe = mtk_foe_get_entry(ppe, cur->hash);
498 ib1 = READ_ONCE(hwe->ib1);
499
500 if (FIELD_GET(MTK_FOE_IB1_STATE, ib1) != MTK_FOE_STATE_BIND) {
501 cur->hash = 0xffff;
502 __mtk_foe_entry_clear(ppe, cur);
503 continue;
504 }
505
506 cur_idle = __mtk_foe_entry_idle_time(ppe, ib1);
507 if (cur_idle >= idle)
508 continue;
509
510 idle = cur_idle;
511 entry->data.ib1 &= ~ib1_ts_mask;
512 entry->data.ib1 |= hwe->ib1 & ib1_ts_mask;
513 }
514}
515
516static void
517mtk_flow_entry_update(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
518{
519 struct mtk_foe_entry foe = {};
520 struct mtk_foe_entry *hwe;
521
522 spin_lock_bh(&ppe_lock);
523
524 if (entry->type == MTK_FLOW_TYPE_L2) {
525 mtk_flow_entry_update_l2(ppe, entry);
526 goto out;
527 }
528
529 if (entry->hash == 0xffff)
530 goto out;
531
532 hwe = mtk_foe_get_entry(ppe, entry->hash);
533 memcpy(&foe, hwe, ppe->eth->soc->foe_entry_size);
534 if (!mtk_flow_entry_match(ppe->eth, entry, &foe)) {
535 entry->hash = 0xffff;
536 goto out;
537 }
538
539 entry->data.ib1 = foe.ib1;
540
541out:
542 spin_unlock_bh(&ppe_lock);
543}
544
545static void
546__mtk_foe_entry_commit(struct mtk_ppe *ppe, struct mtk_foe_entry *entry,
547 u16 hash)
548{
549 struct mtk_eth *eth = ppe->eth;
550 u16 timestamp = mtk_eth_timestamp(eth);
551 struct mtk_foe_entry *hwe;
552
553 if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
554 entry->ib1 &= ~MTK_FOE_IB1_BIND_TIMESTAMP_V2;
555 entry->ib1 |= FIELD_PREP(MTK_FOE_IB1_BIND_TIMESTAMP_V2,
556 timestamp);
557 } else {
558 entry->ib1 &= ~MTK_FOE_IB1_BIND_TIMESTAMP;
559 entry->ib1 |= FIELD_PREP(MTK_FOE_IB1_BIND_TIMESTAMP,
560 timestamp);
561 }
562
563 hwe = mtk_foe_get_entry(ppe, hash);
564 memcpy(&hwe->data, &entry->data, eth->soc->foe_entry_size - sizeof(hwe->ib1));
565 wmb();
566 hwe->ib1 = entry->ib1;
567
568 dma_wmb();
569
570 mtk_ppe_cache_clear(ppe);
571}
572
573void mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
574{
575 spin_lock_bh(&ppe_lock);
576 __mtk_foe_entry_clear(ppe, entry);
577 spin_unlock_bh(&ppe_lock);
578}
579
580static int
581mtk_foe_entry_commit_l2(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
582{
583 entry->type = MTK_FLOW_TYPE_L2;
584
585 return rhashtable_insert_fast(&ppe->l2_flows, &entry->l2_node,
586 mtk_flow_l2_ht_params);
587}
588
589int mtk_foe_entry_commit(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
590{
591 const struct mtk_soc_data *soc = ppe->eth->soc;
592 int type = mtk_get_ib1_pkt_type(ppe->eth, entry->data.ib1);
593 u32 hash;
594
595 if (type == MTK_PPE_PKT_TYPE_BRIDGE)
596 return mtk_foe_entry_commit_l2(ppe, entry);
597
598 hash = mtk_ppe_hash_entry(ppe->eth, &entry->data);
599 entry->hash = 0xffff;
600 spin_lock_bh(&ppe_lock);
601 hlist_add_head(&entry->list, &ppe->foe_flow[hash / soc->hash_offset]);
602 spin_unlock_bh(&ppe_lock);
603
604 return 0;
605}
606
607static void
608mtk_foe_entry_commit_subflow(struct mtk_ppe *ppe, struct mtk_flow_entry *entry,
609 u16 hash)
610{
611 const struct mtk_soc_data *soc = ppe->eth->soc;
612 struct mtk_flow_entry *flow_info;
613 struct mtk_foe_entry foe = {}, *hwe;
614 struct mtk_foe_mac_info *l2;
615 u32 ib1_mask = mtk_get_ib1_pkt_type_mask(ppe->eth) | MTK_FOE_IB1_UDP;
616 int type;
617
618 flow_info = kzalloc(sizeof(*flow_info), GFP_ATOMIC);
619 if (!flow_info)
620 return;
621
622 flow_info->l2_data.base_flow = entry;
623 flow_info->type = MTK_FLOW_TYPE_L2_SUBFLOW;
624 flow_info->hash = hash;
625 hlist_add_head(&flow_info->list,
626 &ppe->foe_flow[hash / soc->hash_offset]);
627 hlist_add_head(&flow_info->l2_data.list, &entry->l2_flows);
628
629 hwe = mtk_foe_get_entry(ppe, hash);
630 memcpy(&foe, hwe, soc->foe_entry_size);
631 foe.ib1 &= ib1_mask;
632 foe.ib1 |= entry->data.ib1 & ~ib1_mask;
633
634 l2 = mtk_foe_entry_l2(ppe->eth, &foe);
635 memcpy(l2, &entry->data.bridge.l2, sizeof(*l2));
636
637 type = mtk_get_ib1_pkt_type(ppe->eth, foe.ib1);
638 if (type == MTK_PPE_PKT_TYPE_IPV4_HNAPT)
639 memcpy(&foe.ipv4.new, &foe.ipv4.orig, sizeof(foe.ipv4.new));
640 else if (type >= MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T && l2->etype == ETH_P_IP)
641 l2->etype = ETH_P_IPV6;
642
643 *mtk_foe_entry_ib2(ppe->eth, &foe) = entry->data.bridge.ib2;
644
645 __mtk_foe_entry_commit(ppe, &foe, hash);
646}
647
648void __mtk_ppe_check_skb(struct mtk_ppe *ppe, struct sk_buff *skb, u16 hash)
649{
650 const struct mtk_soc_data *soc = ppe->eth->soc;
651 struct hlist_head *head = &ppe->foe_flow[hash / soc->hash_offset];
652 struct mtk_foe_entry *hwe = mtk_foe_get_entry(ppe, hash);
653 struct mtk_flow_entry *entry;
654 struct mtk_foe_bridge key = {};
655 struct hlist_node *n;
656 struct ethhdr *eh;
657 bool found = false;
658 u8 *tag;
659
660 spin_lock_bh(&ppe_lock);
661
662 if (FIELD_GET(MTK_FOE_IB1_STATE, hwe->ib1) == MTK_FOE_STATE_BIND)
663 goto out;
664
665 hlist_for_each_entry_safe(entry, n, head, list) {
666 if (entry->type == MTK_FLOW_TYPE_L2_SUBFLOW) {
667 if (unlikely(FIELD_GET(MTK_FOE_IB1_STATE, hwe->ib1) ==
668 MTK_FOE_STATE_BIND))
669 continue;
670
671 entry->hash = 0xffff;
672 __mtk_foe_entry_clear(ppe, entry);
673 continue;
674 }
675
676 if (found || !mtk_flow_entry_match(ppe->eth, entry, hwe)) {
677 if (entry->hash != 0xffff)
678 entry->hash = 0xffff;
679 continue;
680 }
681
682 entry->hash = hash;
683 __mtk_foe_entry_commit(ppe, &entry->data, hash);
684 found = true;
685 }
686
687 if (found)
688 goto out;
689
690 eh = eth_hdr(skb);
691 ether_addr_copy(key.dest_mac, eh->h_dest);
692 ether_addr_copy(key.src_mac, eh->h_source);
693 tag = skb->data - 2;
694 key.vlan = 0;
695 switch (skb->protocol) {
696#if IS_ENABLED(CONFIG_NET_DSA)
697 case htons(ETH_P_XDSA):
698 if (!netdev_uses_dsa(skb->dev) ||
699 skb->dev->dsa_ptr->tag_ops->proto != DSA_TAG_PROTO_MTK)
700 goto out;
701
702 tag += 4;
703 if (get_unaligned_be16(tag) != ETH_P_8021Q)
704 break;
705
706 fallthrough;
707#endif
708 case htons(ETH_P_8021Q):
709 key.vlan = get_unaligned_be16(tag + 2) & VLAN_VID_MASK;
710 break;
711 default:
712 break;
713 }
714
715 entry = rhashtable_lookup_fast(&ppe->l2_flows, &key, mtk_flow_l2_ht_params);
716 if (!entry)
717 goto out;
718
719 mtk_foe_entry_commit_subflow(ppe, entry, hash);
720
721out:
722 spin_unlock_bh(&ppe_lock);
723}
724
725int mtk_foe_entry_idle_time(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
726{
727 mtk_flow_entry_update(ppe, entry);
728
729 return __mtk_foe_entry_idle_time(ppe, entry->data.ib1);
730}
731
732struct mtk_ppe *mtk_ppe_init(struct mtk_eth *eth, void __iomem *base,
733 int version, int index)
734{
735 const struct mtk_soc_data *soc = eth->soc;
736 struct device *dev = eth->dev;
737 struct mtk_ppe *ppe;
738 u32 foe_flow_size;
739 void *foe;
740
741 ppe = devm_kzalloc(dev, sizeof(*ppe), GFP_KERNEL);
742 if (!ppe)
743 return NULL;
744
745 rhashtable_init(&ppe->l2_flows, &mtk_flow_l2_ht_params);
746
747 /* need to allocate a separate device, since it PPE DMA access is
748 * not coherent.
749 */
750 ppe->base = base;
751 ppe->eth = eth;
752 ppe->dev = dev;
753 ppe->version = version;
754
755 foe = dmam_alloc_coherent(ppe->dev,
756 MTK_PPE_ENTRIES * soc->foe_entry_size,
757 &ppe->foe_phys, GFP_KERNEL);
758 if (!foe)
759 goto err_free_l2_flows;
760
761 ppe->foe_table = foe;
762
763 foe_flow_size = (MTK_PPE_ENTRIES / soc->hash_offset) *
764 sizeof(*ppe->foe_flow);
765 ppe->foe_flow = devm_kzalloc(dev, foe_flow_size, GFP_KERNEL);
766 if (!ppe->foe_flow)
767 goto err_free_l2_flows;
768
769 mtk_ppe_debugfs_init(ppe, index);
770
771 return ppe;
772
773err_free_l2_flows:
774 rhashtable_destroy(&ppe->l2_flows);
775 return NULL;
776}
777
778void mtk_ppe_deinit(struct mtk_eth *eth)
779{
780 int i;
781
782 for (i = 0; i < ARRAY_SIZE(eth->ppe); i++) {
783 if (!eth->ppe[i])
784 return;
785 rhashtable_destroy(ð->ppe[i]->l2_flows);
786 }
787}
788
789static void mtk_ppe_init_foe_table(struct mtk_ppe *ppe)
790{
791 static const u8 skip[] = { 12, 25, 38, 51, 76, 89, 102 };
792 int i, k;
793
794 memset(ppe->foe_table, 0,
795 MTK_PPE_ENTRIES * ppe->eth->soc->foe_entry_size);
796
797 if (!IS_ENABLED(CONFIG_SOC_MT7621))
798 return;
799
800 /* skip all entries that cross the 1024 byte boundary */
801 for (i = 0; i < MTK_PPE_ENTRIES; i += 128) {
802 for (k = 0; k < ARRAY_SIZE(skip); k++) {
803 struct mtk_foe_entry *hwe;
804
805 hwe = mtk_foe_get_entry(ppe, i + skip[k]);
806 hwe->ib1 |= MTK_FOE_IB1_STATIC;
807 }
808 }
809}
810
811void mtk_ppe_start(struct mtk_ppe *ppe)
812{
813 u32 val;
814
815 if (!ppe)
816 return;
817
818 mtk_ppe_init_foe_table(ppe);
819 ppe_w32(ppe, MTK_PPE_TB_BASE, ppe->foe_phys);
820
821 val = MTK_PPE_TB_CFG_ENTRY_80B |
822 MTK_PPE_TB_CFG_AGE_NON_L4 |
823 MTK_PPE_TB_CFG_AGE_UNBIND |
824 MTK_PPE_TB_CFG_AGE_TCP |
825 MTK_PPE_TB_CFG_AGE_UDP |
826 MTK_PPE_TB_CFG_AGE_TCP_FIN |
827 FIELD_PREP(MTK_PPE_TB_CFG_SEARCH_MISS,
828 MTK_PPE_SEARCH_MISS_ACTION_FORWARD_BUILD) |
829 FIELD_PREP(MTK_PPE_TB_CFG_KEEPALIVE,
830 MTK_PPE_KEEPALIVE_DISABLE) |
831 FIELD_PREP(MTK_PPE_TB_CFG_HASH_MODE, 1) |
832 FIELD_PREP(MTK_PPE_TB_CFG_SCAN_MODE,
833 MTK_PPE_SCAN_MODE_KEEPALIVE_AGE) |
834 FIELD_PREP(MTK_PPE_TB_CFG_ENTRY_NUM,
835 MTK_PPE_ENTRIES_SHIFT);
836 if (MTK_HAS_CAPS(ppe->eth->soc->caps, MTK_NETSYS_V2))
837 val |= MTK_PPE_TB_CFG_INFO_SEL;
838 ppe_w32(ppe, MTK_PPE_TB_CFG, val);
839
840 ppe_w32(ppe, MTK_PPE_IP_PROTO_CHK,
841 MTK_PPE_IP_PROTO_CHK_IPV4 | MTK_PPE_IP_PROTO_CHK_IPV6);
842
843 mtk_ppe_cache_enable(ppe, true);
844
845 val = MTK_PPE_FLOW_CFG_IP6_3T_ROUTE |
846 MTK_PPE_FLOW_CFG_IP6_5T_ROUTE |
847 MTK_PPE_FLOW_CFG_IP6_6RD |
848 MTK_PPE_FLOW_CFG_IP4_NAT |
849 MTK_PPE_FLOW_CFG_IP4_NAPT |
850 MTK_PPE_FLOW_CFG_IP4_DSLITE |
851 MTK_PPE_FLOW_CFG_IP4_NAT_FRAG;
852 if (MTK_HAS_CAPS(ppe->eth->soc->caps, MTK_NETSYS_V2))
853 val |= MTK_PPE_MD_TOAP_BYP_CRSN0 |
854 MTK_PPE_MD_TOAP_BYP_CRSN1 |
855 MTK_PPE_MD_TOAP_BYP_CRSN2 |
856 MTK_PPE_FLOW_CFG_IP4_HASH_GRE_KEY;
857 else
858 val |= MTK_PPE_FLOW_CFG_IP4_TCP_FRAG |
859 MTK_PPE_FLOW_CFG_IP4_UDP_FRAG;
860 ppe_w32(ppe, MTK_PPE_FLOW_CFG, val);
861
862 val = FIELD_PREP(MTK_PPE_UNBIND_AGE_MIN_PACKETS, 1000) |
863 FIELD_PREP(MTK_PPE_UNBIND_AGE_DELTA, 3);
864 ppe_w32(ppe, MTK_PPE_UNBIND_AGE, val);
865
866 val = FIELD_PREP(MTK_PPE_BIND_AGE0_DELTA_UDP, 12) |
867 FIELD_PREP(MTK_PPE_BIND_AGE0_DELTA_NON_L4, 1);
868 ppe_w32(ppe, MTK_PPE_BIND_AGE0, val);
869
870 val = FIELD_PREP(MTK_PPE_BIND_AGE1_DELTA_TCP_FIN, 1) |
871 FIELD_PREP(MTK_PPE_BIND_AGE1_DELTA_TCP, 7);
872 ppe_w32(ppe, MTK_PPE_BIND_AGE1, val);
873
874 val = MTK_PPE_BIND_LIMIT0_QUARTER | MTK_PPE_BIND_LIMIT0_HALF;
875 ppe_w32(ppe, MTK_PPE_BIND_LIMIT0, val);
876
877 val = MTK_PPE_BIND_LIMIT1_FULL |
878 FIELD_PREP(MTK_PPE_BIND_LIMIT1_NON_L4, 1);
879 ppe_w32(ppe, MTK_PPE_BIND_LIMIT1, val);
880
881 val = FIELD_PREP(MTK_PPE_BIND_RATE_BIND, 30) |
882 FIELD_PREP(MTK_PPE_BIND_RATE_PREBIND, 1);
883 ppe_w32(ppe, MTK_PPE_BIND_RATE, val);
884
885 /* enable PPE */
886 val = MTK_PPE_GLO_CFG_EN |
887 MTK_PPE_GLO_CFG_IP4_L4_CS_DROP |
888 MTK_PPE_GLO_CFG_IP4_CS_DROP |
889 MTK_PPE_GLO_CFG_FLOW_DROP_UPDATE;
890 ppe_w32(ppe, MTK_PPE_GLO_CFG, val);
891
892 ppe_w32(ppe, MTK_PPE_DEFAULT_CPU_PORT, 0);
893
894 if (MTK_HAS_CAPS(ppe->eth->soc->caps, MTK_NETSYS_V2)) {
895 ppe_w32(ppe, MTK_PPE_DEFAULT_CPU_PORT1, 0xcb777);
896 ppe_w32(ppe, MTK_PPE_SBW_CTRL, 0x7f);
897 }
898}
899
900int mtk_ppe_stop(struct mtk_ppe *ppe)
901{
902 u32 val;
903 int i;
904
905 if (!ppe)
906 return 0;
907
908 for (i = 0; i < MTK_PPE_ENTRIES; i++) {
909 struct mtk_foe_entry *hwe = mtk_foe_get_entry(ppe, i);
910
911 hwe->ib1 = FIELD_PREP(MTK_FOE_IB1_STATE,
912 MTK_FOE_STATE_INVALID);
913 }
914
915 mtk_ppe_cache_enable(ppe, false);
916
917 /* disable offload engine */
918 ppe_clear(ppe, MTK_PPE_GLO_CFG, MTK_PPE_GLO_CFG_EN);
919 ppe_w32(ppe, MTK_PPE_FLOW_CFG, 0);
920
921 /* disable aging */
922 val = MTK_PPE_TB_CFG_AGE_NON_L4 |
923 MTK_PPE_TB_CFG_AGE_UNBIND |
924 MTK_PPE_TB_CFG_AGE_TCP |
925 MTK_PPE_TB_CFG_AGE_UDP |
926 MTK_PPE_TB_CFG_AGE_TCP_FIN;
927 ppe_clear(ppe, MTK_PPE_TB_CFG, val);
928
929 return mtk_ppe_wait_busy(ppe);
930}