1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /* Microsemi Ocelot Switch driver
3 * Copyright (c) 2019 Microsemi Corporation
4 */
5
6 #include <linux/iopoll.h>
7 #include <linux/proc_fs.h>
8
9 #include <soc/mscc/ocelot_vcap.h>
10 #include "ocelot_police.h"
11 #include "ocelot_vcap.h"
12
13 #define ENTRY_WIDTH 32
14
15 enum vcap_sel {
16 VCAP_SEL_ENTRY = 0x1,
17 VCAP_SEL_ACTION = 0x2,
18 VCAP_SEL_COUNTER = 0x4,
19 VCAP_SEL_ALL = 0x7,
20 };
21
22 enum vcap_cmd {
23 VCAP_CMD_WRITE = 0, /* Copy from Cache to TCAM */
24 VCAP_CMD_READ = 1, /* Copy from TCAM to Cache */
25 VCAP_CMD_MOVE_UP = 2, /* Move <count> up */
26 VCAP_CMD_MOVE_DOWN = 3, /* Move <count> down */
27 VCAP_CMD_INITIALIZE = 4, /* Write all (from cache) */
28 };
29
30 #define VCAP_ENTRY_WIDTH 12 /* Max entry width (32bit words) */
31 #define VCAP_COUNTER_WIDTH 4 /* Max counter width (32bit words) */
32
33 struct vcap_data {
34 u32 entry[VCAP_ENTRY_WIDTH]; /* ENTRY_DAT */
35 u32 mask[VCAP_ENTRY_WIDTH]; /* MASK_DAT */
36 u32 action[VCAP_ENTRY_WIDTH]; /* ACTION_DAT */
37 u32 counter[VCAP_COUNTER_WIDTH]; /* CNT_DAT */
38 u32 tg; /* TG_DAT */
39 u32 type; /* Action type */
40 u32 tg_sw; /* Current type-group */
41 u32 cnt; /* Current counter */
42 u32 key_offset; /* Current entry offset */
43 u32 action_offset; /* Current action offset */
44 u32 counter_offset; /* Current counter offset */
45 u32 tg_value; /* Current type-group value */
46 u32 tg_mask; /* Current type-group mask */
47 };
48
vcap_read_update_ctrl(struct ocelot * ocelot,const struct vcap_props * vcap)49 static u32 vcap_read_update_ctrl(struct ocelot *ocelot,
50 const struct vcap_props *vcap)
51 {
52 return ocelot_target_read(ocelot, vcap->target, VCAP_CORE_UPDATE_CTRL);
53 }
54
vcap_cmd(struct ocelot * ocelot,const struct vcap_props * vcap,u16 ix,int cmd,int sel)55 static void vcap_cmd(struct ocelot *ocelot, const struct vcap_props *vcap,
56 u16 ix, int cmd, int sel)
57 {
58 u32 value = (VCAP_CORE_UPDATE_CTRL_UPDATE_CMD(cmd) |
59 VCAP_CORE_UPDATE_CTRL_UPDATE_ADDR(ix) |
60 VCAP_CORE_UPDATE_CTRL_UPDATE_SHOT);
61
62 if ((sel & VCAP_SEL_ENTRY) && ix >= vcap->entry_count)
63 return;
64
65 if (!(sel & VCAP_SEL_ENTRY))
66 value |= VCAP_CORE_UPDATE_CTRL_UPDATE_ENTRY_DIS;
67
68 if (!(sel & VCAP_SEL_ACTION))
69 value |= VCAP_CORE_UPDATE_CTRL_UPDATE_ACTION_DIS;
70
71 if (!(sel & VCAP_SEL_COUNTER))
72 value |= VCAP_CORE_UPDATE_CTRL_UPDATE_CNT_DIS;
73
74 ocelot_target_write(ocelot, vcap->target, value, VCAP_CORE_UPDATE_CTRL);
75
76 read_poll_timeout(vcap_read_update_ctrl, value,
77 (value & VCAP_CORE_UPDATE_CTRL_UPDATE_SHOT) == 0,
78 10, 100000, false, ocelot, vcap);
79 }
80
81 /* Convert from 0-based row to VCAP entry row and run command */
vcap_row_cmd(struct ocelot * ocelot,const struct vcap_props * vcap,u32 row,int cmd,int sel)82 static void vcap_row_cmd(struct ocelot *ocelot, const struct vcap_props *vcap,
83 u32 row, int cmd, int sel)
84 {
85 vcap_cmd(ocelot, vcap, vcap->entry_count - row - 1, cmd, sel);
86 }
87
vcap_entry2cache(struct ocelot * ocelot,const struct vcap_props * vcap,struct vcap_data * data)88 static void vcap_entry2cache(struct ocelot *ocelot,
89 const struct vcap_props *vcap,
90 struct vcap_data *data)
91 {
92 u32 entry_words, i;
93
94 entry_words = DIV_ROUND_UP(vcap->entry_width, ENTRY_WIDTH);
95
96 for (i = 0; i < entry_words; i++) {
97 ocelot_target_write_rix(ocelot, vcap->target, data->entry[i],
98 VCAP_CACHE_ENTRY_DAT, i);
99 ocelot_target_write_rix(ocelot, vcap->target, ~data->mask[i],
100 VCAP_CACHE_MASK_DAT, i);
101 }
102 ocelot_target_write(ocelot, vcap->target, data->tg, VCAP_CACHE_TG_DAT);
103 }
104
vcap_cache2entry(struct ocelot * ocelot,const struct vcap_props * vcap,struct vcap_data * data)105 static void vcap_cache2entry(struct ocelot *ocelot,
106 const struct vcap_props *vcap,
107 struct vcap_data *data)
108 {
109 u32 entry_words, i;
110
111 entry_words = DIV_ROUND_UP(vcap->entry_width, ENTRY_WIDTH);
112
113 for (i = 0; i < entry_words; i++) {
114 data->entry[i] = ocelot_target_read_rix(ocelot, vcap->target,
115 VCAP_CACHE_ENTRY_DAT, i);
116 // Invert mask
117 data->mask[i] = ~ocelot_target_read_rix(ocelot, vcap->target,
118 VCAP_CACHE_MASK_DAT, i);
119 }
120 data->tg = ocelot_target_read(ocelot, vcap->target, VCAP_CACHE_TG_DAT);
121 }
122
vcap_action2cache(struct ocelot * ocelot,const struct vcap_props * vcap,struct vcap_data * data)123 static void vcap_action2cache(struct ocelot *ocelot,
124 const struct vcap_props *vcap,
125 struct vcap_data *data)
126 {
127 u32 action_words, mask;
128 int i, width;
129
130 /* Encode action type */
131 width = vcap->action_type_width;
132 if (width) {
133 mask = GENMASK(width, 0);
134 data->action[0] = ((data->action[0] & ~mask) | data->type);
135 }
136
137 action_words = DIV_ROUND_UP(vcap->action_width, ENTRY_WIDTH);
138
139 for (i = 0; i < action_words; i++)
140 ocelot_target_write_rix(ocelot, vcap->target, data->action[i],
141 VCAP_CACHE_ACTION_DAT, i);
142
143 for (i = 0; i < vcap->counter_words; i++)
144 ocelot_target_write_rix(ocelot, vcap->target, data->counter[i],
145 VCAP_CACHE_CNT_DAT, i);
146 }
147
vcap_cache2action(struct ocelot * ocelot,const struct vcap_props * vcap,struct vcap_data * data)148 static void vcap_cache2action(struct ocelot *ocelot,
149 const struct vcap_props *vcap,
150 struct vcap_data *data)
151 {
152 u32 action_words;
153 int i, width;
154
155 action_words = DIV_ROUND_UP(vcap->action_width, ENTRY_WIDTH);
156
157 for (i = 0; i < action_words; i++)
158 data->action[i] = ocelot_target_read_rix(ocelot, vcap->target,
159 VCAP_CACHE_ACTION_DAT,
160 i);
161
162 for (i = 0; i < vcap->counter_words; i++)
163 data->counter[i] = ocelot_target_read_rix(ocelot, vcap->target,
164 VCAP_CACHE_CNT_DAT,
165 i);
166
167 /* Extract action type */
168 width = vcap->action_type_width;
169 data->type = (width ? (data->action[0] & GENMASK(width, 0)) : 0);
170 }
171
172 /* Calculate offsets for entry */
vcap_data_offset_get(const struct vcap_props * vcap,struct vcap_data * data,int ix)173 static void vcap_data_offset_get(const struct vcap_props *vcap,
174 struct vcap_data *data, int ix)
175 {
176 int num_subwords_per_entry, num_subwords_per_action;
177 int i, col, offset, num_entries_per_row, base;
178 u32 width = vcap->tg_width;
179
180 switch (data->tg_sw) {
181 case VCAP_TG_FULL:
182 num_entries_per_row = 1;
183 break;
184 case VCAP_TG_HALF:
185 num_entries_per_row = 2;
186 break;
187 case VCAP_TG_QUARTER:
188 num_entries_per_row = 4;
189 break;
190 default:
191 return;
192 }
193
194 col = (ix % num_entries_per_row);
195 num_subwords_per_entry = (vcap->sw_count / num_entries_per_row);
196 base = (vcap->sw_count - col * num_subwords_per_entry -
197 num_subwords_per_entry);
198 data->tg_value = 0;
199 data->tg_mask = 0;
200 for (i = 0; i < num_subwords_per_entry; i++) {
201 offset = ((base + i) * width);
202 data->tg_value |= (data->tg_sw << offset);
203 data->tg_mask |= GENMASK(offset + width - 1, offset);
204 }
205
206 /* Calculate key/action/counter offsets */
207 col = (num_entries_per_row - col - 1);
208 data->key_offset = (base * vcap->entry_width) / vcap->sw_count;
209 data->counter_offset = (num_subwords_per_entry * col *
210 vcap->counter_width);
211 i = data->type;
212 width = vcap->action_table[i].width;
213 num_subwords_per_action = vcap->action_table[i].count;
214 data->action_offset = ((num_subwords_per_action * col * width) /
215 num_entries_per_row);
216 data->action_offset += vcap->action_type_width;
217 }
218
vcap_data_set(u32 * data,u32 offset,u32 len,u32 value)219 static void vcap_data_set(u32 *data, u32 offset, u32 len, u32 value)
220 {
221 u32 i, v, m;
222
223 for (i = 0; i < len; i++, offset++) {
224 v = data[offset / ENTRY_WIDTH];
225 m = (1 << (offset % ENTRY_WIDTH));
226 if (value & (1 << i))
227 v |= m;
228 else
229 v &= ~m;
230 data[offset / ENTRY_WIDTH] = v;
231 }
232 }
233
vcap_data_get(u32 * data,u32 offset,u32 len)234 static u32 vcap_data_get(u32 *data, u32 offset, u32 len)
235 {
236 u32 i, v, m, value = 0;
237
238 for (i = 0; i < len; i++, offset++) {
239 v = data[offset / ENTRY_WIDTH];
240 m = (1 << (offset % ENTRY_WIDTH));
241 if (v & m)
242 value |= (1 << i);
243 }
244 return value;
245 }
246
vcap_key_field_set(struct vcap_data * data,u32 offset,u32 width,u32 value,u32 mask)247 static void vcap_key_field_set(struct vcap_data *data, u32 offset, u32 width,
248 u32 value, u32 mask)
249 {
250 vcap_data_set(data->entry, offset + data->key_offset, width, value);
251 vcap_data_set(data->mask, offset + data->key_offset, width, mask);
252 }
253
vcap_key_set(const struct vcap_props * vcap,struct vcap_data * data,int field,u32 value,u32 mask)254 static void vcap_key_set(const struct vcap_props *vcap, struct vcap_data *data,
255 int field, u32 value, u32 mask)
256 {
257 u32 offset = vcap->keys[field].offset;
258 u32 length = vcap->keys[field].length;
259
260 vcap_key_field_set(data, offset, length, value, mask);
261 }
262
vcap_key_bytes_set(const struct vcap_props * vcap,struct vcap_data * data,int field,u8 * val,u8 * msk)263 static void vcap_key_bytes_set(const struct vcap_props *vcap,
264 struct vcap_data *data, int field,
265 u8 *val, u8 *msk)
266 {
267 u32 offset = vcap->keys[field].offset;
268 u32 count = vcap->keys[field].length;
269 u32 i, j, n = 0, value = 0, mask = 0;
270
271 WARN_ON(count % 8);
272
273 /* Data wider than 32 bits are split up in chunks of maximum 32 bits.
274 * The 32 LSB of the data are written to the 32 MSB of the TCAM.
275 */
276 offset += count;
277 count /= 8;
278
279 for (i = 0; i < count; i++) {
280 j = (count - i - 1);
281 value += (val[j] << n);
282 mask += (msk[j] << n);
283 n += 8;
284 if (n == ENTRY_WIDTH || (i + 1) == count) {
285 offset -= n;
286 vcap_key_field_set(data, offset, n, value, mask);
287 n = 0;
288 value = 0;
289 mask = 0;
290 }
291 }
292 }
293
vcap_key_l4_port_set(const struct vcap_props * vcap,struct vcap_data * data,int field,struct ocelot_vcap_udp_tcp * port)294 static void vcap_key_l4_port_set(const struct vcap_props *vcap,
295 struct vcap_data *data, int field,
296 struct ocelot_vcap_udp_tcp *port)
297 {
298 u32 offset = vcap->keys[field].offset;
299 u32 length = vcap->keys[field].length;
300
301 WARN_ON(length != 16);
302
303 vcap_key_field_set(data, offset, length, port->value, port->mask);
304 }
305
vcap_key_bit_set(const struct vcap_props * vcap,struct vcap_data * data,int field,enum ocelot_vcap_bit val)306 static void vcap_key_bit_set(const struct vcap_props *vcap,
307 struct vcap_data *data, int field,
308 enum ocelot_vcap_bit val)
309 {
310 u32 value = (val == OCELOT_VCAP_BIT_1 ? 1 : 0);
311 u32 msk = (val == OCELOT_VCAP_BIT_ANY ? 0 : 1);
312 u32 offset = vcap->keys[field].offset;
313 u32 length = vcap->keys[field].length;
314
315 WARN_ON(length != 1);
316
317 vcap_key_field_set(data, offset, length, value, msk);
318 }
319
vcap_action_set(const struct vcap_props * vcap,struct vcap_data * data,int field,u32 value)320 static void vcap_action_set(const struct vcap_props *vcap,
321 struct vcap_data *data, int field, u32 value)
322 {
323 int offset = vcap->actions[field].offset;
324 int length = vcap->actions[field].length;
325
326 vcap_data_set(data->action, offset + data->action_offset, length,
327 value);
328 }
329
is2_action_set(struct ocelot * ocelot,struct vcap_data * data,struct ocelot_vcap_filter * filter)330 static void is2_action_set(struct ocelot *ocelot, struct vcap_data *data,
331 struct ocelot_vcap_filter *filter)
332 {
333 const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS2];
334 struct ocelot_vcap_action *a = &filter->action;
335
336 vcap_action_set(vcap, data, VCAP_IS2_ACT_MASK_MODE, a->mask_mode);
337 vcap_action_set(vcap, data, VCAP_IS2_ACT_PORT_MASK, a->port_mask);
338 vcap_action_set(vcap, data, VCAP_IS2_ACT_POLICE_ENA, a->police_ena);
339 vcap_action_set(vcap, data, VCAP_IS2_ACT_POLICE_IDX, a->pol_ix);
340 vcap_action_set(vcap, data, VCAP_IS2_ACT_CPU_QU_NUM, a->cpu_qu_num);
341 vcap_action_set(vcap, data, VCAP_IS2_ACT_CPU_COPY_ENA, a->cpu_copy_ena);
342 }
343
is2_entry_set(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)344 static void is2_entry_set(struct ocelot *ocelot, int ix,
345 struct ocelot_vcap_filter *filter)
346 {
347 const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS2];
348 struct ocelot_vcap_key_vlan *tag = &filter->vlan;
349 u32 val, msk, type, type_mask = 0xf, i, count;
350 struct ocelot_vcap_u64 payload;
351 struct vcap_data data;
352 int row = (ix / 2);
353
354 memset(&payload, 0, sizeof(payload));
355 memset(&data, 0, sizeof(data));
356
357 /* Read row */
358 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
359 vcap_cache2entry(ocelot, vcap, &data);
360 vcap_cache2action(ocelot, vcap, &data);
361
362 data.tg_sw = VCAP_TG_HALF;
363 vcap_data_offset_get(vcap, &data, ix);
364 data.tg = (data.tg & ~data.tg_mask);
365 if (filter->prio != 0)
366 data.tg |= data.tg_value;
367
368 data.type = IS2_ACTION_TYPE_NORMAL;
369
370 vcap_key_set(vcap, &data, VCAP_IS2_HK_PAG, filter->pag, 0xff);
371 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_FIRST,
372 (filter->lookup == 0) ? OCELOT_VCAP_BIT_1 :
373 OCELOT_VCAP_BIT_0);
374 vcap_key_set(vcap, &data, VCAP_IS2_HK_IGR_PORT_MASK, 0,
375 ~filter->ingress_port_mask);
376 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_HOST_MATCH,
377 OCELOT_VCAP_BIT_ANY);
378 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L2_MC, filter->dmac_mc);
379 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L2_BC, filter->dmac_bc);
380 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_VLAN_TAGGED, tag->tagged);
381 vcap_key_set(vcap, &data, VCAP_IS2_HK_VID,
382 tag->vid.value, tag->vid.mask);
383 vcap_key_set(vcap, &data, VCAP_IS2_HK_PCP,
384 tag->pcp.value[0], tag->pcp.mask[0]);
385 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_DEI, tag->dei);
386
387 switch (filter->key_type) {
388 case OCELOT_VCAP_KEY_ETYPE: {
389 struct ocelot_vcap_key_etype *etype = &filter->key.etype;
390
391 type = IS2_TYPE_ETYPE;
392 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
393 etype->dmac.value, etype->dmac.mask);
394 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
395 etype->smac.value, etype->smac.mask);
396 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_ETYPE,
397 etype->etype.value, etype->etype.mask);
398 /* Clear unused bits */
399 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0,
400 0, 0);
401 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD1,
402 0, 0);
403 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD2,
404 0, 0);
405 vcap_key_bytes_set(vcap, &data,
406 VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0,
407 etype->data.value, etype->data.mask);
408 break;
409 }
410 case OCELOT_VCAP_KEY_LLC: {
411 struct ocelot_vcap_key_llc *llc = &filter->key.llc;
412
413 type = IS2_TYPE_LLC;
414 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
415 llc->dmac.value, llc->dmac.mask);
416 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
417 llc->smac.value, llc->smac.mask);
418 for (i = 0; i < 4; i++) {
419 payload.value[i] = llc->llc.value[i];
420 payload.mask[i] = llc->llc.mask[i];
421 }
422 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_LLC_L2_LLC,
423 payload.value, payload.mask);
424 break;
425 }
426 case OCELOT_VCAP_KEY_SNAP: {
427 struct ocelot_vcap_key_snap *snap = &filter->key.snap;
428
429 type = IS2_TYPE_SNAP;
430 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
431 snap->dmac.value, snap->dmac.mask);
432 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
433 snap->smac.value, snap->smac.mask);
434 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_SNAP_L2_SNAP,
435 filter->key.snap.snap.value,
436 filter->key.snap.snap.mask);
437 break;
438 }
439 case OCELOT_VCAP_KEY_ARP: {
440 struct ocelot_vcap_key_arp *arp = &filter->key.arp;
441
442 type = IS2_TYPE_ARP;
443 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_SMAC,
444 arp->smac.value, arp->smac.mask);
445 vcap_key_bit_set(vcap, &data,
446 VCAP_IS2_HK_MAC_ARP_ADDR_SPACE_OK,
447 arp->ethernet);
448 vcap_key_bit_set(vcap, &data,
449 VCAP_IS2_HK_MAC_ARP_PROTO_SPACE_OK,
450 arp->ip);
451 vcap_key_bit_set(vcap, &data,
452 VCAP_IS2_HK_MAC_ARP_LEN_OK,
453 arp->length);
454 vcap_key_bit_set(vcap, &data,
455 VCAP_IS2_HK_MAC_ARP_TARGET_MATCH,
456 arp->dmac_match);
457 vcap_key_bit_set(vcap, &data,
458 VCAP_IS2_HK_MAC_ARP_SENDER_MATCH,
459 arp->smac_match);
460 vcap_key_bit_set(vcap, &data,
461 VCAP_IS2_HK_MAC_ARP_OPCODE_UNKNOWN,
462 arp->unknown);
463
464 /* OPCODE is inverse, bit 0 is reply flag, bit 1 is RARP flag */
465 val = ((arp->req == OCELOT_VCAP_BIT_0 ? 1 : 0) |
466 (arp->arp == OCELOT_VCAP_BIT_0 ? 2 : 0));
467 msk = ((arp->req == OCELOT_VCAP_BIT_ANY ? 0 : 1) |
468 (arp->arp == OCELOT_VCAP_BIT_ANY ? 0 : 2));
469 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_OPCODE,
470 val, msk);
471 vcap_key_bytes_set(vcap, &data,
472 VCAP_IS2_HK_MAC_ARP_L3_IP4_DIP,
473 arp->dip.value.addr, arp->dip.mask.addr);
474 vcap_key_bytes_set(vcap, &data,
475 VCAP_IS2_HK_MAC_ARP_L3_IP4_SIP,
476 arp->sip.value.addr, arp->sip.mask.addr);
477 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_DIP_EQ_SIP,
478 0, 0);
479 break;
480 }
481 case OCELOT_VCAP_KEY_IPV4:
482 case OCELOT_VCAP_KEY_IPV6: {
483 enum ocelot_vcap_bit sip_eq_dip, sport_eq_dport, seq_zero, tcp;
484 enum ocelot_vcap_bit ttl, fragment, options, tcp_ack, tcp_urg;
485 enum ocelot_vcap_bit tcp_fin, tcp_syn, tcp_rst, tcp_psh;
486 struct ocelot_vcap_key_ipv4 *ipv4 = NULL;
487 struct ocelot_vcap_key_ipv6 *ipv6 = NULL;
488 struct ocelot_vcap_udp_tcp *sport, *dport;
489 struct ocelot_vcap_ipv4 sip, dip;
490 struct ocelot_vcap_u8 proto, ds;
491 struct ocelot_vcap_u48 *ip_data;
492
493 if (filter->key_type == OCELOT_VCAP_KEY_IPV4) {
494 ipv4 = &filter->key.ipv4;
495 ttl = ipv4->ttl;
496 fragment = ipv4->fragment;
497 options = ipv4->options;
498 proto = ipv4->proto;
499 ds = ipv4->ds;
500 ip_data = &ipv4->data;
501 sip = ipv4->sip;
502 dip = ipv4->dip;
503 sport = &ipv4->sport;
504 dport = &ipv4->dport;
505 tcp_fin = ipv4->tcp_fin;
506 tcp_syn = ipv4->tcp_syn;
507 tcp_rst = ipv4->tcp_rst;
508 tcp_psh = ipv4->tcp_psh;
509 tcp_ack = ipv4->tcp_ack;
510 tcp_urg = ipv4->tcp_urg;
511 sip_eq_dip = ipv4->sip_eq_dip;
512 sport_eq_dport = ipv4->sport_eq_dport;
513 seq_zero = ipv4->seq_zero;
514 } else {
515 ipv6 = &filter->key.ipv6;
516 ttl = ipv6->ttl;
517 fragment = OCELOT_VCAP_BIT_ANY;
518 options = OCELOT_VCAP_BIT_ANY;
519 proto = ipv6->proto;
520 ds = ipv6->ds;
521 ip_data = &ipv6->data;
522 for (i = 0; i < 8; i++) {
523 val = ipv6->sip.value[i + 8];
524 msk = ipv6->sip.mask[i + 8];
525 if (i < 4) {
526 dip.value.addr[i] = val;
527 dip.mask.addr[i] = msk;
528 } else {
529 sip.value.addr[i - 4] = val;
530 sip.mask.addr[i - 4] = msk;
531 }
532 }
533 sport = &ipv6->sport;
534 dport = &ipv6->dport;
535 tcp_fin = ipv6->tcp_fin;
536 tcp_syn = ipv6->tcp_syn;
537 tcp_rst = ipv6->tcp_rst;
538 tcp_psh = ipv6->tcp_psh;
539 tcp_ack = ipv6->tcp_ack;
540 tcp_urg = ipv6->tcp_urg;
541 sip_eq_dip = ipv6->sip_eq_dip;
542 sport_eq_dport = ipv6->sport_eq_dport;
543 seq_zero = ipv6->seq_zero;
544 }
545
546 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_IP4,
547 ipv4 ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
548 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L3_FRAGMENT,
549 fragment);
550 vcap_key_set(vcap, &data, VCAP_IS2_HK_L3_FRAG_OFS_GT0, 0, 0);
551 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L3_OPTIONS,
552 options);
553 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_IP4_L3_TTL_GT0,
554 ttl);
555 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_TOS,
556 ds.value, ds.mask);
557 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_IP4_DIP,
558 dip.value.addr, dip.mask.addr);
559 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_IP4_SIP,
560 sip.value.addr, sip.mask.addr);
561 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_DIP_EQ_SIP,
562 sip_eq_dip);
563 val = proto.value[0];
564 msk = proto.mask[0];
565 type = IS2_TYPE_IP_UDP_TCP;
566 if (msk == 0xff && (val == 6 || val == 17)) {
567 /* UDP/TCP protocol match */
568 tcp = (val == 6 ?
569 OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
570 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_TCP, tcp);
571 vcap_key_l4_port_set(vcap, &data,
572 VCAP_IS2_HK_L4_DPORT, dport);
573 vcap_key_l4_port_set(vcap, &data,
574 VCAP_IS2_HK_L4_SPORT, sport);
575 vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_RNG, 0, 0);
576 vcap_key_bit_set(vcap, &data,
577 VCAP_IS2_HK_L4_SPORT_EQ_DPORT,
578 sport_eq_dport);
579 vcap_key_bit_set(vcap, &data,
580 VCAP_IS2_HK_L4_SEQUENCE_EQ0,
581 seq_zero);
582 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_FIN,
583 tcp_fin);
584 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_SYN,
585 tcp_syn);
586 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_RST,
587 tcp_rst);
588 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_PSH,
589 tcp_psh);
590 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_ACK,
591 tcp_ack);
592 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_URG,
593 tcp_urg);
594 vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_1588_DOM,
595 0, 0);
596 vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_1588_VER,
597 0, 0);
598 } else {
599 if (msk == 0) {
600 /* Any IP protocol match */
601 type_mask = IS2_TYPE_MASK_IP_ANY;
602 } else {
603 /* Non-UDP/TCP protocol match */
604 type = IS2_TYPE_IP_OTHER;
605 for (i = 0; i < 6; i++) {
606 payload.value[i] = ip_data->value[i];
607 payload.mask[i] = ip_data->mask[i];
608 }
609 }
610 vcap_key_bytes_set(vcap, &data,
611 VCAP_IS2_HK_IP4_L3_PROTO,
612 proto.value, proto.mask);
613 vcap_key_bytes_set(vcap, &data,
614 VCAP_IS2_HK_L3_PAYLOAD,
615 payload.value, payload.mask);
616 }
617 break;
618 }
619 case OCELOT_VCAP_KEY_ANY:
620 default:
621 type = 0;
622 type_mask = 0;
623 count = vcap->entry_width / 2;
624 /* Iterate over the non-common part of the key and
625 * clear entry data
626 */
627 for (i = vcap->keys[VCAP_IS2_HK_L2_DMAC].offset;
628 i < count; i += ENTRY_WIDTH) {
629 vcap_key_field_set(&data, i, min(32u, count - i), 0, 0);
630 }
631 break;
632 }
633
634 vcap_key_set(vcap, &data, VCAP_IS2_TYPE, type, type_mask);
635 is2_action_set(ocelot, &data, filter);
636 vcap_data_set(data.counter, data.counter_offset,
637 vcap->counter_width, filter->stats.pkts);
638
639 /* Write row */
640 vcap_entry2cache(ocelot, vcap, &data);
641 vcap_action2cache(ocelot, vcap, &data);
642 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
643 }
644
is1_action_set(struct ocelot * ocelot,struct vcap_data * data,const struct ocelot_vcap_filter * filter)645 static void is1_action_set(struct ocelot *ocelot, struct vcap_data *data,
646 const struct ocelot_vcap_filter *filter)
647 {
648 const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS1];
649 const struct ocelot_vcap_action *a = &filter->action;
650
651 vcap_action_set(vcap, data, VCAP_IS1_ACT_VID_REPLACE_ENA,
652 a->vid_replace_ena);
653 vcap_action_set(vcap, data, VCAP_IS1_ACT_VID_ADD_VAL, a->vid);
654 vcap_action_set(vcap, data, VCAP_IS1_ACT_VLAN_POP_CNT_ENA,
655 a->vlan_pop_cnt_ena);
656 vcap_action_set(vcap, data, VCAP_IS1_ACT_VLAN_POP_CNT,
657 a->vlan_pop_cnt);
658 vcap_action_set(vcap, data, VCAP_IS1_ACT_PCP_DEI_ENA, a->pcp_dei_ena);
659 vcap_action_set(vcap, data, VCAP_IS1_ACT_PCP_VAL, a->pcp);
660 vcap_action_set(vcap, data, VCAP_IS1_ACT_DEI_VAL, a->dei);
661 vcap_action_set(vcap, data, VCAP_IS1_ACT_QOS_ENA, a->qos_ena);
662 vcap_action_set(vcap, data, VCAP_IS1_ACT_QOS_VAL, a->qos_val);
663 vcap_action_set(vcap, data, VCAP_IS1_ACT_PAG_OVERRIDE_MASK,
664 a->pag_override_mask);
665 vcap_action_set(vcap, data, VCAP_IS1_ACT_PAG_VAL, a->pag_val);
666 }
667
is1_entry_set(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)668 static void is1_entry_set(struct ocelot *ocelot, int ix,
669 struct ocelot_vcap_filter *filter)
670 {
671 const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS1];
672 struct ocelot_vcap_key_vlan *tag = &filter->vlan;
673 struct ocelot_vcap_u64 payload;
674 struct vcap_data data;
675 int row = ix / 2;
676 u32 type;
677
678 memset(&payload, 0, sizeof(payload));
679 memset(&data, 0, sizeof(data));
680
681 /* Read row */
682 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
683 vcap_cache2entry(ocelot, vcap, &data);
684 vcap_cache2action(ocelot, vcap, &data);
685
686 data.tg_sw = VCAP_TG_HALF;
687 data.type = IS1_ACTION_TYPE_NORMAL;
688 vcap_data_offset_get(vcap, &data, ix);
689 data.tg = (data.tg & ~data.tg_mask);
690 if (filter->prio != 0)
691 data.tg |= data.tg_value;
692
693 vcap_key_set(vcap, &data, VCAP_IS1_HK_LOOKUP, filter->lookup, 0x3);
694 vcap_key_set(vcap, &data, VCAP_IS1_HK_IGR_PORT_MASK, 0,
695 ~filter->ingress_port_mask);
696 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_L2_MC, filter->dmac_mc);
697 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_L2_BC, filter->dmac_bc);
698 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_VLAN_TAGGED, tag->tagged);
699 vcap_key_set(vcap, &data, VCAP_IS1_HK_VID,
700 tag->vid.value, tag->vid.mask);
701 vcap_key_set(vcap, &data, VCAP_IS1_HK_PCP,
702 tag->pcp.value[0], tag->pcp.mask[0]);
703 type = IS1_TYPE_S1_NORMAL;
704
705 switch (filter->key_type) {
706 case OCELOT_VCAP_KEY_ETYPE: {
707 struct ocelot_vcap_key_etype *etype = &filter->key.etype;
708
709 vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_L2_SMAC,
710 etype->smac.value, etype->smac.mask);
711 vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_ETYPE,
712 etype->etype.value, etype->etype.mask);
713 break;
714 }
715 case OCELOT_VCAP_KEY_IPV4: {
716 struct ocelot_vcap_key_ipv4 *ipv4 = &filter->key.ipv4;
717 struct ocelot_vcap_udp_tcp *sport = &ipv4->sport;
718 struct ocelot_vcap_udp_tcp *dport = &ipv4->dport;
719 enum ocelot_vcap_bit tcp_udp = OCELOT_VCAP_BIT_0;
720 struct ocelot_vcap_u8 proto = ipv4->proto;
721 struct ocelot_vcap_ipv4 sip = ipv4->sip;
722 u32 val, msk;
723
724 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_IP_SNAP,
725 OCELOT_VCAP_BIT_1);
726 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_IP4,
727 OCELOT_VCAP_BIT_1);
728 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_ETYPE_LEN,
729 OCELOT_VCAP_BIT_1);
730 vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_L3_IP4_SIP,
731 sip.value.addr, sip.mask.addr);
732
733 val = proto.value[0];
734 msk = proto.mask[0];
735
736 if ((val == NEXTHDR_TCP || val == NEXTHDR_UDP) && msk == 0xff)
737 tcp_udp = OCELOT_VCAP_BIT_1;
738 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TCP_UDP, tcp_udp);
739
740 if (tcp_udp) {
741 enum ocelot_vcap_bit tcp = OCELOT_VCAP_BIT_0;
742
743 if (val == NEXTHDR_TCP)
744 tcp = OCELOT_VCAP_BIT_1;
745
746 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TCP, tcp);
747 vcap_key_l4_port_set(vcap, &data, VCAP_IS1_HK_L4_SPORT,
748 sport);
749 /* Overloaded field */
750 vcap_key_l4_port_set(vcap, &data, VCAP_IS1_HK_ETYPE,
751 dport);
752 } else {
753 /* IPv4 "other" frame */
754 struct ocelot_vcap_u16 etype = {0};
755
756 /* Overloaded field */
757 etype.value[0] = proto.value[0];
758 etype.mask[0] = proto.mask[0];
759
760 vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_ETYPE,
761 etype.value, etype.mask);
762 }
763 break;
764 }
765 default:
766 break;
767 }
768 vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TYPE,
769 type ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
770
771 is1_action_set(ocelot, &data, filter);
772 vcap_data_set(data.counter, data.counter_offset,
773 vcap->counter_width, filter->stats.pkts);
774
775 /* Write row */
776 vcap_entry2cache(ocelot, vcap, &data);
777 vcap_action2cache(ocelot, vcap, &data);
778 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
779 }
780
es0_action_set(struct ocelot * ocelot,struct vcap_data * data,const struct ocelot_vcap_filter * filter)781 static void es0_action_set(struct ocelot *ocelot, struct vcap_data *data,
782 const struct ocelot_vcap_filter *filter)
783 {
784 const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
785 const struct ocelot_vcap_action *a = &filter->action;
786
787 vcap_action_set(vcap, data, VCAP_ES0_ACT_PUSH_OUTER_TAG,
788 a->push_outer_tag);
789 vcap_action_set(vcap, data, VCAP_ES0_ACT_PUSH_INNER_TAG,
790 a->push_inner_tag);
791 vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_TPID_SEL,
792 a->tag_a_tpid_sel);
793 vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_VID_SEL,
794 a->tag_a_vid_sel);
795 vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_PCP_SEL,
796 a->tag_a_pcp_sel);
797 vcap_action_set(vcap, data, VCAP_ES0_ACT_VID_A_VAL, a->vid_a_val);
798 vcap_action_set(vcap, data, VCAP_ES0_ACT_PCP_A_VAL, a->pcp_a_val);
799 vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_TPID_SEL,
800 a->tag_b_tpid_sel);
801 vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_VID_SEL,
802 a->tag_b_vid_sel);
803 vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_PCP_SEL,
804 a->tag_b_pcp_sel);
805 vcap_action_set(vcap, data, VCAP_ES0_ACT_VID_B_VAL, a->vid_b_val);
806 vcap_action_set(vcap, data, VCAP_ES0_ACT_PCP_B_VAL, a->pcp_b_val);
807 }
808
es0_entry_set(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)809 static void es0_entry_set(struct ocelot *ocelot, int ix,
810 struct ocelot_vcap_filter *filter)
811 {
812 const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
813 struct ocelot_vcap_key_vlan *tag = &filter->vlan;
814 struct ocelot_vcap_u64 payload;
815 struct vcap_data data;
816 int row = ix;
817
818 memset(&payload, 0, sizeof(payload));
819 memset(&data, 0, sizeof(data));
820
821 /* Read row */
822 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
823 vcap_cache2entry(ocelot, vcap, &data);
824 vcap_cache2action(ocelot, vcap, &data);
825
826 data.tg_sw = VCAP_TG_FULL;
827 data.type = ES0_ACTION_TYPE_NORMAL;
828 vcap_data_offset_get(vcap, &data, ix);
829 data.tg = (data.tg & ~data.tg_mask);
830 if (filter->prio != 0)
831 data.tg |= data.tg_value;
832
833 vcap_key_set(vcap, &data, VCAP_ES0_IGR_PORT, filter->ingress_port.value,
834 filter->ingress_port.mask);
835 vcap_key_set(vcap, &data, VCAP_ES0_EGR_PORT, filter->egress_port.value,
836 filter->egress_port.mask);
837 vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_MC, filter->dmac_mc);
838 vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_BC, filter->dmac_bc);
839 vcap_key_set(vcap, &data, VCAP_ES0_VID,
840 tag->vid.value, tag->vid.mask);
841 vcap_key_set(vcap, &data, VCAP_ES0_PCP,
842 tag->pcp.value[0], tag->pcp.mask[0]);
843
844 es0_action_set(ocelot, &data, filter);
845 vcap_data_set(data.counter, data.counter_offset,
846 vcap->counter_width, filter->stats.pkts);
847
848 /* Write row */
849 vcap_entry2cache(ocelot, vcap, &data);
850 vcap_action2cache(ocelot, vcap, &data);
851 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
852 }
853
vcap_entry_get(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)854 static void vcap_entry_get(struct ocelot *ocelot, int ix,
855 struct ocelot_vcap_filter *filter)
856 {
857 const struct vcap_props *vcap = &ocelot->vcap[filter->block_id];
858 struct vcap_data data;
859 int row, count;
860 u32 cnt;
861
862 if (filter->block_id == VCAP_ES0)
863 data.tg_sw = VCAP_TG_FULL;
864 else
865 data.tg_sw = VCAP_TG_HALF;
866
867 count = (1 << (data.tg_sw - 1));
868 row = (ix / count);
869 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_COUNTER);
870 vcap_cache2action(ocelot, vcap, &data);
871 vcap_data_offset_get(vcap, &data, ix);
872 cnt = vcap_data_get(data.counter, data.counter_offset,
873 vcap->counter_width);
874
875 filter->stats.pkts = cnt;
876 }
877
vcap_entry_set(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)878 static void vcap_entry_set(struct ocelot *ocelot, int ix,
879 struct ocelot_vcap_filter *filter)
880 {
881 if (filter->block_id == VCAP_IS1)
882 return is1_entry_set(ocelot, ix, filter);
883 if (filter->block_id == VCAP_IS2)
884 return is2_entry_set(ocelot, ix, filter);
885 if (filter->block_id == VCAP_ES0)
886 return es0_entry_set(ocelot, ix, filter);
887 }
888
ocelot_vcap_policer_add(struct ocelot * ocelot,u32 pol_ix,struct ocelot_policer * pol)889 static int ocelot_vcap_policer_add(struct ocelot *ocelot, u32 pol_ix,
890 struct ocelot_policer *pol)
891 {
892 struct qos_policer_conf pp = { 0 };
893
894 if (!pol)
895 return -EINVAL;
896
897 pp.mode = MSCC_QOS_RATE_MODE_DATA;
898 pp.pir = pol->rate;
899 pp.pbs = pol->burst;
900
901 return qos_policer_conf_set(ocelot, 0, pol_ix, &pp);
902 }
903
ocelot_vcap_policer_del(struct ocelot * ocelot,struct ocelot_vcap_block * block,u32 pol_ix)904 static void ocelot_vcap_policer_del(struct ocelot *ocelot,
905 struct ocelot_vcap_block *block,
906 u32 pol_ix)
907 {
908 struct ocelot_vcap_filter *filter;
909 struct qos_policer_conf pp = {0};
910 int index = -1;
911
912 if (pol_ix < block->pol_lpr)
913 return;
914
915 list_for_each_entry(filter, &block->rules, list) {
916 index++;
917 if (filter->block_id == VCAP_IS2 &&
918 filter->action.police_ena &&
919 filter->action.pol_ix < pol_ix) {
920 filter->action.pol_ix += 1;
921 ocelot_vcap_policer_add(ocelot, filter->action.pol_ix,
922 &filter->action.pol);
923 is2_entry_set(ocelot, index, filter);
924 }
925 }
926
927 pp.mode = MSCC_QOS_RATE_MODE_DISABLED;
928 qos_policer_conf_set(ocelot, 0, pol_ix, &pp);
929
930 block->pol_lpr++;
931 }
932
ocelot_vcap_filter_add_to_block(struct ocelot * ocelot,struct ocelot_vcap_block * block,struct ocelot_vcap_filter * filter)933 static void ocelot_vcap_filter_add_to_block(struct ocelot *ocelot,
934 struct ocelot_vcap_block *block,
935 struct ocelot_vcap_filter *filter)
936 {
937 struct ocelot_vcap_filter *tmp;
938 struct list_head *pos, *n;
939
940 if (filter->block_id == VCAP_IS2 && filter->action.police_ena) {
941 block->pol_lpr--;
942 filter->action.pol_ix = block->pol_lpr;
943 ocelot_vcap_policer_add(ocelot, filter->action.pol_ix,
944 &filter->action.pol);
945 }
946
947 block->count++;
948
949 if (list_empty(&block->rules)) {
950 list_add(&filter->list, &block->rules);
951 return;
952 }
953
954 list_for_each_safe(pos, n, &block->rules) {
955 tmp = list_entry(pos, struct ocelot_vcap_filter, list);
956 if (filter->prio < tmp->prio)
957 break;
958 }
959 list_add(&filter->list, pos->prev);
960 }
961
ocelot_vcap_filter_equal(const struct ocelot_vcap_filter * a,const struct ocelot_vcap_filter * b)962 static bool ocelot_vcap_filter_equal(const struct ocelot_vcap_filter *a,
963 const struct ocelot_vcap_filter *b)
964 {
965 return !memcmp(&a->id, &b->id, sizeof(struct ocelot_vcap_id));
966 }
967
ocelot_vcap_block_get_filter_index(struct ocelot_vcap_block * block,struct ocelot_vcap_filter * filter)968 static int ocelot_vcap_block_get_filter_index(struct ocelot_vcap_block *block,
969 struct ocelot_vcap_filter *filter)
970 {
971 struct ocelot_vcap_filter *tmp;
972 int index = 0;
973
974 list_for_each_entry(tmp, &block->rules, list) {
975 if (ocelot_vcap_filter_equal(filter, tmp))
976 return index;
977 index++;
978 }
979
980 return -ENOENT;
981 }
982
983 static struct ocelot_vcap_filter*
ocelot_vcap_block_find_filter_by_index(struct ocelot_vcap_block * block,int index)984 ocelot_vcap_block_find_filter_by_index(struct ocelot_vcap_block *block,
985 int index)
986 {
987 struct ocelot_vcap_filter *tmp;
988 int i = 0;
989
990 list_for_each_entry(tmp, &block->rules, list) {
991 if (i == index)
992 return tmp;
993 ++i;
994 }
995
996 return NULL;
997 }
998
999 struct ocelot_vcap_filter *
ocelot_vcap_block_find_filter_by_id(struct ocelot_vcap_block * block,unsigned long cookie,bool tc_offload)1000 ocelot_vcap_block_find_filter_by_id(struct ocelot_vcap_block *block,
1001 unsigned long cookie, bool tc_offload)
1002 {
1003 struct ocelot_vcap_filter *filter;
1004
1005 list_for_each_entry(filter, &block->rules, list)
1006 if (filter->id.tc_offload == tc_offload &&
1007 filter->id.cookie == cookie)
1008 return filter;
1009
1010 return NULL;
1011 }
1012 EXPORT_SYMBOL(ocelot_vcap_block_find_filter_by_id);
1013
1014 /* If @on=false, then SNAP, ARP, IP and OAM frames will not match on keys based
1015 * on destination and source MAC addresses, but only on higher-level protocol
1016 * information. The only frame types to match on keys containing MAC addresses
1017 * in this case are non-SNAP, non-ARP, non-IP and non-OAM frames.
1018 *
1019 * If @on=true, then the above frame types (SNAP, ARP, IP and OAM) will match
1020 * on MAC_ETYPE keys such as destination and source MAC on this ingress port.
1021 * However the setting has the side effect of making these frames not matching
1022 * on any _other_ keys than MAC_ETYPE ones.
1023 */
ocelot_match_all_as_mac_etype(struct ocelot * ocelot,int port,int lookup,bool on)1024 static void ocelot_match_all_as_mac_etype(struct ocelot *ocelot, int port,
1025 int lookup, bool on)
1026 {
1027 u32 val = 0;
1028
1029 if (on)
1030 val = ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) |
1031 ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) |
1032 ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) |
1033 ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) |
1034 ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup));
1035
1036 ocelot_rmw_gix(ocelot, val,
1037 ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) |
1038 ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) |
1039 ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) |
1040 ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) |
1041 ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup)),
1042 ANA_PORT_VCAP_S2_CFG, port);
1043 }
1044
1045 static bool
ocelot_vcap_is_problematic_mac_etype(struct ocelot_vcap_filter * filter)1046 ocelot_vcap_is_problematic_mac_etype(struct ocelot_vcap_filter *filter)
1047 {
1048 u16 proto, mask;
1049
1050 if (filter->key_type != OCELOT_VCAP_KEY_ETYPE)
1051 return false;
1052
1053 proto = ntohs(*(__be16 *)filter->key.etype.etype.value);
1054 mask = ntohs(*(__be16 *)filter->key.etype.etype.mask);
1055
1056 /* ETH_P_ALL match, so all protocols below are included */
1057 if (mask == 0)
1058 return true;
1059 if (proto == ETH_P_ARP)
1060 return true;
1061 if (proto == ETH_P_IP)
1062 return true;
1063 if (proto == ETH_P_IPV6)
1064 return true;
1065
1066 return false;
1067 }
1068
1069 static bool
ocelot_vcap_is_problematic_non_mac_etype(struct ocelot_vcap_filter * filter)1070 ocelot_vcap_is_problematic_non_mac_etype(struct ocelot_vcap_filter *filter)
1071 {
1072 if (filter->key_type == OCELOT_VCAP_KEY_SNAP)
1073 return true;
1074 if (filter->key_type == OCELOT_VCAP_KEY_ARP)
1075 return true;
1076 if (filter->key_type == OCELOT_VCAP_KEY_IPV4)
1077 return true;
1078 if (filter->key_type == OCELOT_VCAP_KEY_IPV6)
1079 return true;
1080 return false;
1081 }
1082
1083 static bool
ocelot_exclusive_mac_etype_filter_rules(struct ocelot * ocelot,struct ocelot_vcap_filter * filter)1084 ocelot_exclusive_mac_etype_filter_rules(struct ocelot *ocelot,
1085 struct ocelot_vcap_filter *filter)
1086 {
1087 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1088 struct ocelot_vcap_filter *tmp;
1089 unsigned long port;
1090 int i;
1091
1092 /* We only have the S2_IP_TCPUDP_DIS set of knobs for VCAP IS2 */
1093 if (filter->block_id != VCAP_IS2)
1094 return true;
1095
1096 if (ocelot_vcap_is_problematic_mac_etype(filter)) {
1097 /* Search for any non-MAC_ETYPE rules on the port */
1098 for (i = 0; i < block->count; i++) {
1099 tmp = ocelot_vcap_block_find_filter_by_index(block, i);
1100 if (tmp->ingress_port_mask & filter->ingress_port_mask &&
1101 tmp->lookup == filter->lookup &&
1102 ocelot_vcap_is_problematic_non_mac_etype(tmp))
1103 return false;
1104 }
1105
1106 for_each_set_bit(port, &filter->ingress_port_mask,
1107 ocelot->num_phys_ports)
1108 ocelot_match_all_as_mac_etype(ocelot, port,
1109 filter->lookup, true);
1110 } else if (ocelot_vcap_is_problematic_non_mac_etype(filter)) {
1111 /* Search for any MAC_ETYPE rules on the port */
1112 for (i = 0; i < block->count; i++) {
1113 tmp = ocelot_vcap_block_find_filter_by_index(block, i);
1114 if (tmp->ingress_port_mask & filter->ingress_port_mask &&
1115 tmp->lookup == filter->lookup &&
1116 ocelot_vcap_is_problematic_mac_etype(tmp))
1117 return false;
1118 }
1119
1120 for_each_set_bit(port, &filter->ingress_port_mask,
1121 ocelot->num_phys_ports)
1122 ocelot_match_all_as_mac_etype(ocelot, port,
1123 filter->lookup, false);
1124 }
1125
1126 return true;
1127 }
1128
ocelot_vcap_filter_add(struct ocelot * ocelot,struct ocelot_vcap_filter * filter,struct netlink_ext_ack * extack)1129 int ocelot_vcap_filter_add(struct ocelot *ocelot,
1130 struct ocelot_vcap_filter *filter,
1131 struct netlink_ext_ack *extack)
1132 {
1133 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1134 int i, index;
1135
1136 if (!ocelot_exclusive_mac_etype_filter_rules(ocelot, filter)) {
1137 NL_SET_ERR_MSG_MOD(extack,
1138 "Cannot mix MAC_ETYPE with non-MAC_ETYPE rules, use the other IS2 lookup");
1139 return -EBUSY;
1140 }
1141
1142 /* Add filter to the linked list */
1143 ocelot_vcap_filter_add_to_block(ocelot, block, filter);
1144
1145 /* Get the index of the inserted filter */
1146 index = ocelot_vcap_block_get_filter_index(block, filter);
1147 if (index < 0)
1148 return index;
1149
1150 /* Move down the rules to make place for the new filter */
1151 for (i = block->count - 1; i > index; i--) {
1152 struct ocelot_vcap_filter *tmp;
1153
1154 tmp = ocelot_vcap_block_find_filter_by_index(block, i);
1155 /* Read back the filter's counters before moving it */
1156 vcap_entry_get(ocelot, i - 1, tmp);
1157 vcap_entry_set(ocelot, i, tmp);
1158 }
1159
1160 /* Now insert the new filter */
1161 vcap_entry_set(ocelot, index, filter);
1162 return 0;
1163 }
1164 EXPORT_SYMBOL(ocelot_vcap_filter_add);
1165
ocelot_vcap_block_remove_filter(struct ocelot * ocelot,struct ocelot_vcap_block * block,struct ocelot_vcap_filter * filter)1166 static void ocelot_vcap_block_remove_filter(struct ocelot *ocelot,
1167 struct ocelot_vcap_block *block,
1168 struct ocelot_vcap_filter *filter)
1169 {
1170 struct ocelot_vcap_filter *tmp;
1171 struct list_head *pos, *q;
1172
1173 list_for_each_safe(pos, q, &block->rules) {
1174 tmp = list_entry(pos, struct ocelot_vcap_filter, list);
1175 if (ocelot_vcap_filter_equal(filter, tmp)) {
1176 if (tmp->block_id == VCAP_IS2 &&
1177 tmp->action.police_ena)
1178 ocelot_vcap_policer_del(ocelot, block,
1179 tmp->action.pol_ix);
1180
1181 list_del(pos);
1182 kfree(tmp);
1183 }
1184 }
1185
1186 block->count--;
1187 }
1188
ocelot_vcap_filter_del(struct ocelot * ocelot,struct ocelot_vcap_filter * filter)1189 int ocelot_vcap_filter_del(struct ocelot *ocelot,
1190 struct ocelot_vcap_filter *filter)
1191 {
1192 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1193 struct ocelot_vcap_filter del_filter;
1194 int i, index;
1195
1196 /* Need to inherit the block_id so that vcap_entry_set()
1197 * does not get confused and knows where to install it.
1198 */
1199 memset(&del_filter, 0, sizeof(del_filter));
1200 del_filter.block_id = filter->block_id;
1201
1202 /* Gets index of the filter */
1203 index = ocelot_vcap_block_get_filter_index(block, filter);
1204 if (index < 0)
1205 return index;
1206
1207 /* Delete filter */
1208 ocelot_vcap_block_remove_filter(ocelot, block, filter);
1209
1210 /* Move up all the blocks over the deleted filter */
1211 for (i = index; i < block->count; i++) {
1212 struct ocelot_vcap_filter *tmp;
1213
1214 tmp = ocelot_vcap_block_find_filter_by_index(block, i);
1215 /* Read back the filter's counters before moving it */
1216 vcap_entry_get(ocelot, i + 1, tmp);
1217 vcap_entry_set(ocelot, i, tmp);
1218 }
1219
1220 /* Now delete the last filter, because it is duplicated */
1221 vcap_entry_set(ocelot, block->count, &del_filter);
1222
1223 return 0;
1224 }
1225 EXPORT_SYMBOL(ocelot_vcap_filter_del);
1226
ocelot_vcap_filter_stats_update(struct ocelot * ocelot,struct ocelot_vcap_filter * filter)1227 int ocelot_vcap_filter_stats_update(struct ocelot *ocelot,
1228 struct ocelot_vcap_filter *filter)
1229 {
1230 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1231 struct ocelot_vcap_filter tmp;
1232 int index;
1233
1234 index = ocelot_vcap_block_get_filter_index(block, filter);
1235 if (index < 0)
1236 return index;
1237
1238 vcap_entry_get(ocelot, index, filter);
1239
1240 /* After we get the result we need to clear the counters */
1241 tmp = *filter;
1242 tmp.stats.pkts = 0;
1243 vcap_entry_set(ocelot, index, &tmp);
1244
1245 return 0;
1246 }
1247
ocelot_vcap_init_one(struct ocelot * ocelot,const struct vcap_props * vcap)1248 static void ocelot_vcap_init_one(struct ocelot *ocelot,
1249 const struct vcap_props *vcap)
1250 {
1251 struct vcap_data data;
1252
1253 memset(&data, 0, sizeof(data));
1254
1255 vcap_entry2cache(ocelot, vcap, &data);
1256 ocelot_target_write(ocelot, vcap->target, vcap->entry_count,
1257 VCAP_CORE_MV_CFG);
1258 vcap_cmd(ocelot, vcap, 0, VCAP_CMD_INITIALIZE, VCAP_SEL_ENTRY);
1259
1260 vcap_action2cache(ocelot, vcap, &data);
1261 ocelot_target_write(ocelot, vcap->target, vcap->action_count,
1262 VCAP_CORE_MV_CFG);
1263 vcap_cmd(ocelot, vcap, 0, VCAP_CMD_INITIALIZE,
1264 VCAP_SEL_ACTION | VCAP_SEL_COUNTER);
1265 }
1266
ocelot_vcap_detect_constants(struct ocelot * ocelot,struct vcap_props * vcap)1267 static void ocelot_vcap_detect_constants(struct ocelot *ocelot,
1268 struct vcap_props *vcap)
1269 {
1270 int counter_memory_width;
1271 int num_default_actions;
1272 int version;
1273
1274 version = ocelot_target_read(ocelot, vcap->target,
1275 VCAP_CONST_VCAP_VER);
1276 /* Only version 0 VCAP supported for now */
1277 if (WARN_ON(version != 0))
1278 return;
1279
1280 /* Width in bits of type-group field */
1281 vcap->tg_width = ocelot_target_read(ocelot, vcap->target,
1282 VCAP_CONST_ENTRY_TG_WIDTH);
1283 /* Number of subwords per TCAM row */
1284 vcap->sw_count = ocelot_target_read(ocelot, vcap->target,
1285 VCAP_CONST_ENTRY_SWCNT);
1286 /* Number of rows in TCAM. There can be this many full keys, or double
1287 * this number half keys, or 4 times this number quarter keys.
1288 */
1289 vcap->entry_count = ocelot_target_read(ocelot, vcap->target,
1290 VCAP_CONST_ENTRY_CNT);
1291 /* Assuming there are 4 subwords per TCAM row, their layout in the
1292 * actual TCAM (not in the cache) would be:
1293 *
1294 * | SW 3 | TG 3 | SW 2 | TG 2 | SW 1 | TG 1 | SW 0 | TG 0 |
1295 *
1296 * (where SW=subword and TG=Type-Group).
1297 *
1298 * What VCAP_CONST_ENTRY_CNT is giving us is the width of one full TCAM
1299 * row. But when software accesses the TCAM through the cache
1300 * registers, the Type-Group values are written through another set of
1301 * registers VCAP_TG_DAT, and therefore, it appears as though the 4
1302 * subwords are contiguous in the cache memory.
1303 * Important mention: regardless of the number of key entries per row
1304 * (and therefore of key size: 1 full key or 2 half keys or 4 quarter
1305 * keys), software always has to configure 4 Type-Group values. For
1306 * example, in the case of 1 full key, the driver needs to set all 4
1307 * Type-Group to be full key.
1308 *
1309 * For this reason, we need to fix up the value that the hardware is
1310 * giving us. We don't actually care about the width of the entry in
1311 * the TCAM. What we care about is the width of the entry in the cache
1312 * registers, which is how we get to interact with it. And since the
1313 * VCAP_ENTRY_DAT cache registers access only the subwords and not the
1314 * Type-Groups, this means we need to subtract the width of the
1315 * Type-Groups when packing and unpacking key entry data in a TCAM row.
1316 */
1317 vcap->entry_width = ocelot_target_read(ocelot, vcap->target,
1318 VCAP_CONST_ENTRY_WIDTH);
1319 vcap->entry_width -= vcap->tg_width * vcap->sw_count;
1320 num_default_actions = ocelot_target_read(ocelot, vcap->target,
1321 VCAP_CONST_ACTION_DEF_CNT);
1322 vcap->action_count = vcap->entry_count + num_default_actions;
1323 vcap->action_width = ocelot_target_read(ocelot, vcap->target,
1324 VCAP_CONST_ACTION_WIDTH);
1325 /* The width of the counter memory, this is the complete width of all
1326 * counter-fields associated with one full-word entry. There is one
1327 * counter per entry sub-word (see CAP_CORE::ENTRY_SWCNT for number of
1328 * subwords.)
1329 */
1330 vcap->counter_words = vcap->sw_count;
1331 counter_memory_width = ocelot_target_read(ocelot, vcap->target,
1332 VCAP_CONST_CNT_WIDTH);
1333 vcap->counter_width = counter_memory_width / vcap->counter_words;
1334 }
1335
ocelot_vcap_init(struct ocelot * ocelot)1336 int ocelot_vcap_init(struct ocelot *ocelot)
1337 {
1338 int i;
1339
1340 /* Create a policer that will drop the frames for the cpu.
1341 * This policer will be used as action in the acl rules to drop
1342 * frames.
1343 */
1344 ocelot_write_gix(ocelot, 0x299, ANA_POL_MODE_CFG,
1345 OCELOT_POLICER_DISCARD);
1346 ocelot_write_gix(ocelot, 0x1, ANA_POL_PIR_CFG,
1347 OCELOT_POLICER_DISCARD);
1348 ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_PIR_STATE,
1349 OCELOT_POLICER_DISCARD);
1350 ocelot_write_gix(ocelot, 0x0, ANA_POL_CIR_CFG,
1351 OCELOT_POLICER_DISCARD);
1352 ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_CIR_STATE,
1353 OCELOT_POLICER_DISCARD);
1354
1355 for (i = 0; i < OCELOT_NUM_VCAP_BLOCKS; i++) {
1356 struct ocelot_vcap_block *block = &ocelot->block[i];
1357 struct vcap_props *vcap = &ocelot->vcap[i];
1358
1359 INIT_LIST_HEAD(&block->rules);
1360 block->pol_lpr = OCELOT_POLICER_DISCARD - 1;
1361
1362 ocelot_vcap_detect_constants(ocelot, vcap);
1363 ocelot_vcap_init_one(ocelot, vcap);
1364 }
1365
1366 INIT_LIST_HEAD(&ocelot->dummy_rules);
1367
1368 return 0;
1369 }
1370