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 "ocelot_ace.h"
10 #include "ocelot_vcap.h"
11 #include "ocelot_s2.h"
12
13 #define OCELOT_POLICER_DISCARD 0x17f
14
15 static struct ocelot_acl_block *acl_block;
16
17 struct vcap_props {
18 const char *name; /* Symbolic name */
19 u16 tg_width; /* Type-group width (in bits) */
20 u16 sw_count; /* Sub word count */
21 u16 entry_count; /* Entry count */
22 u16 entry_words; /* Number of entry words */
23 u16 entry_width; /* Entry width (in bits) */
24 u16 action_count; /* Action count */
25 u16 action_words; /* Number of action words */
26 u16 action_width; /* Action width (in bits) */
27 u16 action_type_width; /* Action type width (in bits) */
28 struct {
29 u16 width; /* Action type width (in bits) */
30 u16 count; /* Action type sub word count */
31 } action_table[2];
32 u16 counter_words; /* Number of counter words */
33 u16 counter_width; /* Counter width (in bits) */
34 };
35
36 #define ENTRY_WIDTH 32
37 #define BITS_TO_32BIT(x) (1 + (((x) - 1) / ENTRY_WIDTH))
38
39 static const struct vcap_props vcap_is2 = {
40 .name = "IS2",
41 .tg_width = 2,
42 .sw_count = 4,
43 .entry_count = VCAP_IS2_CNT,
44 .entry_words = BITS_TO_32BIT(VCAP_IS2_ENTRY_WIDTH),
45 .entry_width = VCAP_IS2_ENTRY_WIDTH,
46 .action_count = (VCAP_IS2_CNT + VCAP_PORT_CNT + 2),
47 .action_words = BITS_TO_32BIT(VCAP_IS2_ACTION_WIDTH),
48 .action_width = (VCAP_IS2_ACTION_WIDTH),
49 .action_type_width = 1,
50 .action_table = {
51 {
52 .width = (IS2_AO_ACL_ID + IS2_AL_ACL_ID),
53 .count = 2
54 },
55 {
56 .width = 6,
57 .count = 4
58 },
59 },
60 .counter_words = BITS_TO_32BIT(4 * ENTRY_WIDTH),
61 .counter_width = ENTRY_WIDTH,
62 };
63
64 enum vcap_sel {
65 VCAP_SEL_ENTRY = 0x1,
66 VCAP_SEL_ACTION = 0x2,
67 VCAP_SEL_COUNTER = 0x4,
68 VCAP_SEL_ALL = 0x7,
69 };
70
71 enum vcap_cmd {
72 VCAP_CMD_WRITE = 0, /* Copy from Cache to TCAM */
73 VCAP_CMD_READ = 1, /* Copy from TCAM to Cache */
74 VCAP_CMD_MOVE_UP = 2, /* Move <count> up */
75 VCAP_CMD_MOVE_DOWN = 3, /* Move <count> down */
76 VCAP_CMD_INITIALIZE = 4, /* Write all (from cache) */
77 };
78
79 #define VCAP_ENTRY_WIDTH 12 /* Max entry width (32bit words) */
80 #define VCAP_COUNTER_WIDTH 4 /* Max counter width (32bit words) */
81
82 struct vcap_data {
83 u32 entry[VCAP_ENTRY_WIDTH]; /* ENTRY_DAT */
84 u32 mask[VCAP_ENTRY_WIDTH]; /* MASK_DAT */
85 u32 action[VCAP_ENTRY_WIDTH]; /* ACTION_DAT */
86 u32 counter[VCAP_COUNTER_WIDTH]; /* CNT_DAT */
87 u32 tg; /* TG_DAT */
88 u32 type; /* Action type */
89 u32 tg_sw; /* Current type-group */
90 u32 cnt; /* Current counter */
91 u32 key_offset; /* Current entry offset */
92 u32 action_offset; /* Current action offset */
93 u32 counter_offset; /* Current counter offset */
94 u32 tg_value; /* Current type-group value */
95 u32 tg_mask; /* Current type-group mask */
96 };
97
vcap_s2_read_update_ctrl(struct ocelot * oc)98 static u32 vcap_s2_read_update_ctrl(struct ocelot *oc)
99 {
100 return ocelot_read(oc, S2_CORE_UPDATE_CTRL);
101 }
102
vcap_cmd(struct ocelot * oc,u16 ix,int cmd,int sel)103 static void vcap_cmd(struct ocelot *oc, u16 ix, int cmd, int sel)
104 {
105 u32 value = (S2_CORE_UPDATE_CTRL_UPDATE_CMD(cmd) |
106 S2_CORE_UPDATE_CTRL_UPDATE_ADDR(ix) |
107 S2_CORE_UPDATE_CTRL_UPDATE_SHOT);
108
109 if ((sel & VCAP_SEL_ENTRY) && ix >= vcap_is2.entry_count)
110 return;
111
112 if (!(sel & VCAP_SEL_ENTRY))
113 value |= S2_CORE_UPDATE_CTRL_UPDATE_ENTRY_DIS;
114
115 if (!(sel & VCAP_SEL_ACTION))
116 value |= S2_CORE_UPDATE_CTRL_UPDATE_ACTION_DIS;
117
118 if (!(sel & VCAP_SEL_COUNTER))
119 value |= S2_CORE_UPDATE_CTRL_UPDATE_CNT_DIS;
120
121 ocelot_write(oc, value, S2_CORE_UPDATE_CTRL);
122 readx_poll_timeout(vcap_s2_read_update_ctrl, oc, value,
123 (value & S2_CORE_UPDATE_CTRL_UPDATE_SHOT) == 0,
124 10, 100000);
125 }
126
127 /* Convert from 0-based row to VCAP entry row and run command */
vcap_row_cmd(struct ocelot * oc,u32 row,int cmd,int sel)128 static void vcap_row_cmd(struct ocelot *oc, u32 row, int cmd, int sel)
129 {
130 vcap_cmd(oc, vcap_is2.entry_count - row - 1, cmd, sel);
131 }
132
vcap_entry2cache(struct ocelot * oc,struct vcap_data * data)133 static void vcap_entry2cache(struct ocelot *oc, struct vcap_data *data)
134 {
135 u32 i;
136
137 for (i = 0; i < vcap_is2.entry_words; i++) {
138 ocelot_write_rix(oc, data->entry[i], S2_CACHE_ENTRY_DAT, i);
139 ocelot_write_rix(oc, ~data->mask[i], S2_CACHE_MASK_DAT, i);
140 }
141 ocelot_write(oc, data->tg, S2_CACHE_TG_DAT);
142 }
143
vcap_cache2entry(struct ocelot * oc,struct vcap_data * data)144 static void vcap_cache2entry(struct ocelot *oc, struct vcap_data *data)
145 {
146 u32 i;
147
148 for (i = 0; i < vcap_is2.entry_words; i++) {
149 data->entry[i] = ocelot_read_rix(oc, S2_CACHE_ENTRY_DAT, i);
150 // Invert mask
151 data->mask[i] = ~ocelot_read_rix(oc, S2_CACHE_MASK_DAT, i);
152 }
153 data->tg = ocelot_read(oc, S2_CACHE_TG_DAT);
154 }
155
vcap_action2cache(struct ocelot * oc,struct vcap_data * data)156 static void vcap_action2cache(struct ocelot *oc, struct vcap_data *data)
157 {
158 u32 i, width, mask;
159
160 /* Encode action type */
161 width = vcap_is2.action_type_width;
162 if (width) {
163 mask = GENMASK(width, 0);
164 data->action[0] = ((data->action[0] & ~mask) | data->type);
165 }
166
167 for (i = 0; i < vcap_is2.action_words; i++)
168 ocelot_write_rix(oc, data->action[i], S2_CACHE_ACTION_DAT, i);
169
170 for (i = 0; i < vcap_is2.counter_words; i++)
171 ocelot_write_rix(oc, data->counter[i], S2_CACHE_CNT_DAT, i);
172 }
173
vcap_cache2action(struct ocelot * oc,struct vcap_data * data)174 static void vcap_cache2action(struct ocelot *oc, struct vcap_data *data)
175 {
176 u32 i, width;
177
178 for (i = 0; i < vcap_is2.action_words; i++)
179 data->action[i] = ocelot_read_rix(oc, S2_CACHE_ACTION_DAT, i);
180
181 for (i = 0; i < vcap_is2.counter_words; i++)
182 data->counter[i] = ocelot_read_rix(oc, S2_CACHE_CNT_DAT, i);
183
184 /* Extract action type */
185 width = vcap_is2.action_type_width;
186 data->type = (width ? (data->action[0] & GENMASK(width, 0)) : 0);
187 }
188
189 /* Calculate offsets for entry */
is2_data_get(struct vcap_data * data,int ix)190 static void is2_data_get(struct vcap_data *data, int ix)
191 {
192 u32 i, col, offset, count, cnt, base, width = vcap_is2.tg_width;
193
194 count = (data->tg_sw == VCAP_TG_HALF ? 2 : 4);
195 col = (ix % 2);
196 cnt = (vcap_is2.sw_count / count);
197 base = (vcap_is2.sw_count - col * cnt - cnt);
198 data->tg_value = 0;
199 data->tg_mask = 0;
200 for (i = 0; i < cnt; 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 = (count - col - 1);
208 data->key_offset = (base * vcap_is2.entry_width) / vcap_is2.sw_count;
209 data->counter_offset = (cnt * col * vcap_is2.counter_width);
210 i = data->type;
211 width = vcap_is2.action_table[i].width;
212 cnt = vcap_is2.action_table[i].count;
213 data->action_offset =
214 (((cnt * col * width) / count) + vcap_is2.action_type_width);
215 }
216
vcap_data_set(u32 * data,u32 offset,u32 len,u32 value)217 static void vcap_data_set(u32 *data, u32 offset, u32 len, u32 value)
218 {
219 u32 i, v, m;
220
221 for (i = 0; i < len; i++, offset++) {
222 v = data[offset / ENTRY_WIDTH];
223 m = (1 << (offset % ENTRY_WIDTH));
224 if (value & (1 << i))
225 v |= m;
226 else
227 v &= ~m;
228 data[offset / ENTRY_WIDTH] = v;
229 }
230 }
231
vcap_data_get(u32 * data,u32 offset,u32 len)232 static u32 vcap_data_get(u32 *data, u32 offset, u32 len)
233 {
234 u32 i, v, m, value = 0;
235
236 for (i = 0; i < len; i++, offset++) {
237 v = data[offset / ENTRY_WIDTH];
238 m = (1 << (offset % ENTRY_WIDTH));
239 if (v & m)
240 value |= (1 << i);
241 }
242 return value;
243 }
244
vcap_key_set(struct vcap_data * data,u32 offset,u32 width,u32 value,u32 mask)245 static void vcap_key_set(struct vcap_data *data, u32 offset, u32 width,
246 u32 value, u32 mask)
247 {
248 vcap_data_set(data->entry, offset + data->key_offset, width, value);
249 vcap_data_set(data->mask, offset + data->key_offset, width, mask);
250 }
251
vcap_key_bytes_set(struct vcap_data * data,u32 offset,u8 * val,u8 * msk,u32 count)252 static void vcap_key_bytes_set(struct vcap_data *data, u32 offset, u8 *val,
253 u8 *msk, u32 count)
254 {
255 u32 i, j, n = 0, value = 0, mask = 0;
256
257 /* Data wider than 32 bits are split up in chunks of maximum 32 bits.
258 * The 32 LSB of the data are written to the 32 MSB of the TCAM.
259 */
260 offset += (count * 8);
261 for (i = 0; i < count; i++) {
262 j = (count - i - 1);
263 value += (val[j] << n);
264 mask += (msk[j] << n);
265 n += 8;
266 if (n == ENTRY_WIDTH || (i + 1) == count) {
267 offset -= n;
268 vcap_key_set(data, offset, n, value, mask);
269 n = 0;
270 value = 0;
271 mask = 0;
272 }
273 }
274 }
275
vcap_key_l4_port_set(struct vcap_data * data,u32 offset,struct ocelot_vcap_udp_tcp * port)276 static void vcap_key_l4_port_set(struct vcap_data *data, u32 offset,
277 struct ocelot_vcap_udp_tcp *port)
278 {
279 vcap_key_set(data, offset, 16, port->value, port->mask);
280 }
281
vcap_key_bit_set(struct vcap_data * data,u32 offset,enum ocelot_vcap_bit val)282 static void vcap_key_bit_set(struct vcap_data *data, u32 offset,
283 enum ocelot_vcap_bit val)
284 {
285 vcap_key_set(data, offset, 1, val == OCELOT_VCAP_BIT_1 ? 1 : 0,
286 val == OCELOT_VCAP_BIT_ANY ? 0 : 1);
287 }
288
289 #define VCAP_KEY_SET(fld, val, msk) \
290 vcap_key_set(&data, IS2_HKO_##fld, IS2_HKL_##fld, val, msk)
291 #define VCAP_KEY_ANY_SET(fld) \
292 vcap_key_set(&data, IS2_HKO_##fld, IS2_HKL_##fld, 0, 0)
293 #define VCAP_KEY_BIT_SET(fld, val) vcap_key_bit_set(&data, IS2_HKO_##fld, val)
294 #define VCAP_KEY_BYTES_SET(fld, val, msk) \
295 vcap_key_bytes_set(&data, IS2_HKO_##fld, val, msk, IS2_HKL_##fld / 8)
296
vcap_action_set(struct vcap_data * data,u32 offset,u32 width,u32 value)297 static void vcap_action_set(struct vcap_data *data, u32 offset, u32 width,
298 u32 value)
299 {
300 vcap_data_set(data->action, offset + data->action_offset, width, value);
301 }
302
303 #define VCAP_ACT_SET(fld, val) \
304 vcap_action_set(data, IS2_AO_##fld, IS2_AL_##fld, val)
305
is2_action_set(struct vcap_data * data,enum ocelot_ace_action action)306 static void is2_action_set(struct vcap_data *data,
307 enum ocelot_ace_action action)
308 {
309 switch (action) {
310 case OCELOT_ACL_ACTION_DROP:
311 VCAP_ACT_SET(PORT_MASK, 0x0);
312 VCAP_ACT_SET(MASK_MODE, 0x1);
313 VCAP_ACT_SET(POLICE_ENA, 0x1);
314 VCAP_ACT_SET(POLICE_IDX, OCELOT_POLICER_DISCARD);
315 VCAP_ACT_SET(CPU_QU_NUM, 0x0);
316 VCAP_ACT_SET(CPU_COPY_ENA, 0x0);
317 break;
318 case OCELOT_ACL_ACTION_TRAP:
319 VCAP_ACT_SET(PORT_MASK, 0x0);
320 VCAP_ACT_SET(MASK_MODE, 0x1);
321 VCAP_ACT_SET(POLICE_ENA, 0x0);
322 VCAP_ACT_SET(POLICE_IDX, 0x0);
323 VCAP_ACT_SET(CPU_QU_NUM, 0x0);
324 VCAP_ACT_SET(CPU_COPY_ENA, 0x1);
325 break;
326 }
327 }
328
is2_entry_set(struct ocelot * ocelot,int ix,struct ocelot_ace_rule * ace)329 static void is2_entry_set(struct ocelot *ocelot, int ix,
330 struct ocelot_ace_rule *ace)
331 {
332 u32 val, msk, type, type_mask = 0xf, i, count;
333 struct ocelot_ace_vlan *tag = &ace->vlan;
334 struct ocelot_vcap_u64 payload;
335 struct vcap_data data;
336 int row = (ix / 2);
337
338 memset(&payload, 0, sizeof(payload));
339 memset(&data, 0, sizeof(data));
340
341 /* Read row */
342 vcap_row_cmd(ocelot, row, VCAP_CMD_READ, VCAP_SEL_ALL);
343 vcap_cache2entry(ocelot, &data);
344 vcap_cache2action(ocelot, &data);
345
346 data.tg_sw = VCAP_TG_HALF;
347 is2_data_get(&data, ix);
348 data.tg = (data.tg & ~data.tg_mask);
349 if (ace->prio != 0)
350 data.tg |= data.tg_value;
351
352 data.type = IS2_ACTION_TYPE_NORMAL;
353
354 VCAP_KEY_ANY_SET(PAG);
355 VCAP_KEY_SET(IGR_PORT_MASK, 0, ~BIT(ace->chip_port));
356 VCAP_KEY_BIT_SET(FIRST, OCELOT_VCAP_BIT_1);
357 VCAP_KEY_BIT_SET(HOST_MATCH, OCELOT_VCAP_BIT_ANY);
358 VCAP_KEY_BIT_SET(L2_MC, ace->dmac_mc);
359 VCAP_KEY_BIT_SET(L2_BC, ace->dmac_bc);
360 VCAP_KEY_BIT_SET(VLAN_TAGGED, tag->tagged);
361 VCAP_KEY_SET(VID, tag->vid.value, tag->vid.mask);
362 VCAP_KEY_SET(PCP, tag->pcp.value[0], tag->pcp.mask[0]);
363 VCAP_KEY_BIT_SET(DEI, tag->dei);
364
365 switch (ace->type) {
366 case OCELOT_ACE_TYPE_ETYPE: {
367 struct ocelot_ace_frame_etype *etype = &ace->frame.etype;
368
369 type = IS2_TYPE_ETYPE;
370 VCAP_KEY_BYTES_SET(L2_DMAC, etype->dmac.value,
371 etype->dmac.mask);
372 VCAP_KEY_BYTES_SET(L2_SMAC, etype->smac.value,
373 etype->smac.mask);
374 VCAP_KEY_BYTES_SET(MAC_ETYPE_ETYPE, etype->etype.value,
375 etype->etype.mask);
376 VCAP_KEY_ANY_SET(MAC_ETYPE_L2_PAYLOAD); // Clear unused bits
377 vcap_key_bytes_set(&data, IS2_HKO_MAC_ETYPE_L2_PAYLOAD,
378 etype->data.value, etype->data.mask, 2);
379 break;
380 }
381 case OCELOT_ACE_TYPE_LLC: {
382 struct ocelot_ace_frame_llc *llc = &ace->frame.llc;
383
384 type = IS2_TYPE_LLC;
385 VCAP_KEY_BYTES_SET(L2_DMAC, llc->dmac.value, llc->dmac.mask);
386 VCAP_KEY_BYTES_SET(L2_SMAC, llc->smac.value, llc->smac.mask);
387 for (i = 0; i < 4; i++) {
388 payload.value[i] = llc->llc.value[i];
389 payload.mask[i] = llc->llc.mask[i];
390 }
391 VCAP_KEY_BYTES_SET(MAC_LLC_L2_LLC, payload.value, payload.mask);
392 break;
393 }
394 case OCELOT_ACE_TYPE_SNAP: {
395 struct ocelot_ace_frame_snap *snap = &ace->frame.snap;
396
397 type = IS2_TYPE_SNAP;
398 VCAP_KEY_BYTES_SET(L2_DMAC, snap->dmac.value, snap->dmac.mask);
399 VCAP_KEY_BYTES_SET(L2_SMAC, snap->smac.value, snap->smac.mask);
400 VCAP_KEY_BYTES_SET(MAC_SNAP_L2_SNAP,
401 ace->frame.snap.snap.value,
402 ace->frame.snap.snap.mask);
403 break;
404 }
405 case OCELOT_ACE_TYPE_ARP: {
406 struct ocelot_ace_frame_arp *arp = &ace->frame.arp;
407
408 type = IS2_TYPE_ARP;
409 VCAP_KEY_BYTES_SET(MAC_ARP_L2_SMAC, arp->smac.value,
410 arp->smac.mask);
411 VCAP_KEY_BIT_SET(MAC_ARP_ARP_ADDR_SPACE_OK, arp->ethernet);
412 VCAP_KEY_BIT_SET(MAC_ARP_ARP_PROTO_SPACE_OK, arp->ip);
413 VCAP_KEY_BIT_SET(MAC_ARP_ARP_LEN_OK, arp->length);
414 VCAP_KEY_BIT_SET(MAC_ARP_ARP_TGT_MATCH, arp->dmac_match);
415 VCAP_KEY_BIT_SET(MAC_ARP_ARP_SENDER_MATCH, arp->smac_match);
416 VCAP_KEY_BIT_SET(MAC_ARP_ARP_OPCODE_UNKNOWN, arp->unknown);
417
418 /* OPCODE is inverse, bit 0 is reply flag, bit 1 is RARP flag */
419 val = ((arp->req == OCELOT_VCAP_BIT_0 ? 1 : 0) |
420 (arp->arp == OCELOT_VCAP_BIT_0 ? 2 : 0));
421 msk = ((arp->req == OCELOT_VCAP_BIT_ANY ? 0 : 1) |
422 (arp->arp == OCELOT_VCAP_BIT_ANY ? 0 : 2));
423 VCAP_KEY_SET(MAC_ARP_ARP_OPCODE, val, msk);
424 vcap_key_bytes_set(&data, IS2_HKO_MAC_ARP_L3_IP4_DIP,
425 arp->dip.value.addr, arp->dip.mask.addr, 4);
426 vcap_key_bytes_set(&data, IS2_HKO_MAC_ARP_L3_IP4_SIP,
427 arp->sip.value.addr, arp->sip.mask.addr, 4);
428 VCAP_KEY_ANY_SET(MAC_ARP_DIP_EQ_SIP);
429 break;
430 }
431 case OCELOT_ACE_TYPE_IPV4:
432 case OCELOT_ACE_TYPE_IPV6: {
433 enum ocelot_vcap_bit sip_eq_dip, sport_eq_dport, seq_zero, tcp;
434 enum ocelot_vcap_bit ttl, fragment, options, tcp_ack, tcp_urg;
435 enum ocelot_vcap_bit tcp_fin, tcp_syn, tcp_rst, tcp_psh;
436 struct ocelot_ace_frame_ipv4 *ipv4 = NULL;
437 struct ocelot_ace_frame_ipv6 *ipv6 = NULL;
438 struct ocelot_vcap_udp_tcp *sport, *dport;
439 struct ocelot_vcap_ipv4 sip, dip;
440 struct ocelot_vcap_u8 proto, ds;
441 struct ocelot_vcap_u48 *ip_data;
442
443 if (ace->type == OCELOT_ACE_TYPE_IPV4) {
444 ipv4 = &ace->frame.ipv4;
445 ttl = ipv4->ttl;
446 fragment = ipv4->fragment;
447 options = ipv4->options;
448 proto = ipv4->proto;
449 ds = ipv4->ds;
450 ip_data = &ipv4->data;
451 sip = ipv4->sip;
452 dip = ipv4->dip;
453 sport = &ipv4->sport;
454 dport = &ipv4->dport;
455 tcp_fin = ipv4->tcp_fin;
456 tcp_syn = ipv4->tcp_syn;
457 tcp_rst = ipv4->tcp_rst;
458 tcp_psh = ipv4->tcp_psh;
459 tcp_ack = ipv4->tcp_ack;
460 tcp_urg = ipv4->tcp_urg;
461 sip_eq_dip = ipv4->sip_eq_dip;
462 sport_eq_dport = ipv4->sport_eq_dport;
463 seq_zero = ipv4->seq_zero;
464 } else {
465 ipv6 = &ace->frame.ipv6;
466 ttl = ipv6->ttl;
467 fragment = OCELOT_VCAP_BIT_ANY;
468 options = OCELOT_VCAP_BIT_ANY;
469 proto = ipv6->proto;
470 ds = ipv6->ds;
471 ip_data = &ipv6->data;
472 for (i = 0; i < 8; i++) {
473 val = ipv6->sip.value[i + 8];
474 msk = ipv6->sip.mask[i + 8];
475 if (i < 4) {
476 dip.value.addr[i] = val;
477 dip.mask.addr[i] = msk;
478 } else {
479 sip.value.addr[i - 4] = val;
480 sip.mask.addr[i - 4] = msk;
481 }
482 }
483 sport = &ipv6->sport;
484 dport = &ipv6->dport;
485 tcp_fin = ipv6->tcp_fin;
486 tcp_syn = ipv6->tcp_syn;
487 tcp_rst = ipv6->tcp_rst;
488 tcp_psh = ipv6->tcp_psh;
489 tcp_ack = ipv6->tcp_ack;
490 tcp_urg = ipv6->tcp_urg;
491 sip_eq_dip = ipv6->sip_eq_dip;
492 sport_eq_dport = ipv6->sport_eq_dport;
493 seq_zero = ipv6->seq_zero;
494 }
495
496 VCAP_KEY_BIT_SET(IP4,
497 ipv4 ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
498 VCAP_KEY_BIT_SET(L3_FRAGMENT, fragment);
499 VCAP_KEY_ANY_SET(L3_FRAG_OFS_GT0);
500 VCAP_KEY_BIT_SET(L3_OPTIONS, options);
501 VCAP_KEY_BIT_SET(L3_TTL_GT0, ttl);
502 VCAP_KEY_BYTES_SET(L3_TOS, ds.value, ds.mask);
503 vcap_key_bytes_set(&data, IS2_HKO_L3_IP4_DIP, dip.value.addr,
504 dip.mask.addr, 4);
505 vcap_key_bytes_set(&data, IS2_HKO_L3_IP4_SIP, sip.value.addr,
506 sip.mask.addr, 4);
507 VCAP_KEY_BIT_SET(DIP_EQ_SIP, sip_eq_dip);
508 val = proto.value[0];
509 msk = proto.mask[0];
510 type = IS2_TYPE_IP_UDP_TCP;
511 if (msk == 0xff && (val == 6 || val == 17)) {
512 /* UDP/TCP protocol match */
513 tcp = (val == 6 ?
514 OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
515 VCAP_KEY_BIT_SET(IP4_TCP_UDP_TCP, tcp);
516 vcap_key_l4_port_set(&data,
517 IS2_HKO_IP4_TCP_UDP_L4_DPORT,
518 dport);
519 vcap_key_l4_port_set(&data,
520 IS2_HKO_IP4_TCP_UDP_L4_SPORT,
521 sport);
522 VCAP_KEY_ANY_SET(IP4_TCP_UDP_L4_RNG);
523 VCAP_KEY_BIT_SET(IP4_TCP_UDP_SPORT_EQ_DPORT,
524 sport_eq_dport);
525 VCAP_KEY_BIT_SET(IP4_TCP_UDP_SEQUENCE_EQ0, seq_zero);
526 VCAP_KEY_BIT_SET(IP4_TCP_UDP_L4_FIN, tcp_fin);
527 VCAP_KEY_BIT_SET(IP4_TCP_UDP_L4_SYN, tcp_syn);
528 VCAP_KEY_BIT_SET(IP4_TCP_UDP_L4_RST, tcp_rst);
529 VCAP_KEY_BIT_SET(IP4_TCP_UDP_L4_PSH, tcp_psh);
530 VCAP_KEY_BIT_SET(IP4_TCP_UDP_L4_ACK, tcp_ack);
531 VCAP_KEY_BIT_SET(IP4_TCP_UDP_L4_URG, tcp_urg);
532 VCAP_KEY_ANY_SET(IP4_TCP_UDP_L4_1588_DOM);
533 VCAP_KEY_ANY_SET(IP4_TCP_UDP_L4_1588_VER);
534 } else {
535 if (msk == 0) {
536 /* Any IP protocol match */
537 type_mask = IS2_TYPE_MASK_IP_ANY;
538 } else {
539 /* Non-UDP/TCP protocol match */
540 type = IS2_TYPE_IP_OTHER;
541 for (i = 0; i < 6; i++) {
542 payload.value[i] = ip_data->value[i];
543 payload.mask[i] = ip_data->mask[i];
544 }
545 }
546 VCAP_KEY_BYTES_SET(IP4_OTHER_L3_PROTO, proto.value,
547 proto.mask);
548 VCAP_KEY_BYTES_SET(IP4_OTHER_L3_PAYLOAD, payload.value,
549 payload.mask);
550 }
551 break;
552 }
553 case OCELOT_ACE_TYPE_ANY:
554 default:
555 type = 0;
556 type_mask = 0;
557 count = (vcap_is2.entry_width / 2);
558 for (i = (IS2_HKO_PCP + IS2_HKL_PCP); i < count;
559 i += ENTRY_WIDTH) {
560 /* Clear entry data */
561 vcap_key_set(&data, i, min(32u, count - i), 0, 0);
562 }
563 break;
564 }
565
566 VCAP_KEY_SET(TYPE, type, type_mask);
567 is2_action_set(&data, ace->action);
568 vcap_data_set(data.counter, data.counter_offset, vcap_is2.counter_width,
569 ace->stats.pkts);
570
571 /* Write row */
572 vcap_entry2cache(ocelot, &data);
573 vcap_action2cache(ocelot, &data);
574 vcap_row_cmd(ocelot, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
575 }
576
is2_entry_get(struct ocelot_ace_rule * rule,int ix)577 static void is2_entry_get(struct ocelot_ace_rule *rule, int ix)
578 {
579 struct ocelot *op = rule->port->ocelot;
580 struct vcap_data data;
581 int row = (ix / 2);
582 u32 cnt;
583
584 vcap_row_cmd(op, row, VCAP_CMD_READ, VCAP_SEL_COUNTER);
585 vcap_cache2action(op, &data);
586 data.tg_sw = VCAP_TG_HALF;
587 is2_data_get(&data, ix);
588 cnt = vcap_data_get(data.counter, data.counter_offset,
589 vcap_is2.counter_width);
590
591 rule->stats.pkts = cnt;
592 }
593
ocelot_ace_rule_add(struct ocelot_acl_block * block,struct ocelot_ace_rule * rule)594 static void ocelot_ace_rule_add(struct ocelot_acl_block *block,
595 struct ocelot_ace_rule *rule)
596 {
597 struct ocelot_ace_rule *tmp;
598 struct list_head *pos, *n;
599
600 block->count++;
601
602 if (list_empty(&block->rules)) {
603 list_add(&rule->list, &block->rules);
604 return;
605 }
606
607 list_for_each_safe(pos, n, &block->rules) {
608 tmp = list_entry(pos, struct ocelot_ace_rule, list);
609 if (rule->prio < tmp->prio)
610 break;
611 }
612 list_add(&rule->list, pos->prev);
613 }
614
ocelot_ace_rule_get_index_id(struct ocelot_acl_block * block,struct ocelot_ace_rule * rule)615 static int ocelot_ace_rule_get_index_id(struct ocelot_acl_block *block,
616 struct ocelot_ace_rule *rule)
617 {
618 struct ocelot_ace_rule *tmp;
619 int index = -1;
620
621 list_for_each_entry(tmp, &block->rules, list) {
622 ++index;
623 if (rule->id == tmp->id)
624 break;
625 }
626 return index;
627 }
628
629 static struct ocelot_ace_rule*
ocelot_ace_rule_get_rule_index(struct ocelot_acl_block * block,int index)630 ocelot_ace_rule_get_rule_index(struct ocelot_acl_block *block, int index)
631 {
632 struct ocelot_ace_rule *tmp;
633 int i = 0;
634
635 list_for_each_entry(tmp, &block->rules, list) {
636 if (i == index)
637 return tmp;
638 ++i;
639 }
640
641 return NULL;
642 }
643
ocelot_ace_rule_offload_add(struct ocelot_ace_rule * rule)644 int ocelot_ace_rule_offload_add(struct ocelot_ace_rule *rule)
645 {
646 struct ocelot_ace_rule *ace;
647 int i, index;
648
649 /* Add rule to the linked list */
650 ocelot_ace_rule_add(acl_block, rule);
651
652 /* Get the index of the inserted rule */
653 index = ocelot_ace_rule_get_index_id(acl_block, rule);
654
655 /* Move down the rules to make place for the new rule */
656 for (i = acl_block->count - 1; i > index; i--) {
657 ace = ocelot_ace_rule_get_rule_index(acl_block, i);
658 is2_entry_set(rule->port->ocelot, i, ace);
659 }
660
661 /* Now insert the new rule */
662 is2_entry_set(rule->port->ocelot, index, rule);
663 return 0;
664 }
665
ocelot_ace_rule_del(struct ocelot_acl_block * block,struct ocelot_ace_rule * rule)666 static void ocelot_ace_rule_del(struct ocelot_acl_block *block,
667 struct ocelot_ace_rule *rule)
668 {
669 struct ocelot_ace_rule *tmp;
670 struct list_head *pos, *q;
671
672 list_for_each_safe(pos, q, &block->rules) {
673 tmp = list_entry(pos, struct ocelot_ace_rule, list);
674 if (tmp->id == rule->id) {
675 list_del(pos);
676 kfree(tmp);
677 }
678 }
679
680 block->count--;
681 }
682
ocelot_ace_rule_offload_del(struct ocelot_ace_rule * rule)683 int ocelot_ace_rule_offload_del(struct ocelot_ace_rule *rule)
684 {
685 struct ocelot_ace_rule del_ace;
686 struct ocelot_ace_rule *ace;
687 int i, index;
688
689 memset(&del_ace, 0, sizeof(del_ace));
690
691 /* Gets index of the rule */
692 index = ocelot_ace_rule_get_index_id(acl_block, rule);
693
694 /* Delete rule */
695 ocelot_ace_rule_del(acl_block, rule);
696
697 /* Move up all the blocks over the deleted rule */
698 for (i = index; i < acl_block->count; i++) {
699 ace = ocelot_ace_rule_get_rule_index(acl_block, i);
700 is2_entry_set(rule->port->ocelot, i, ace);
701 }
702
703 /* Now delete the last rule, because it is duplicated */
704 is2_entry_set(rule->port->ocelot, acl_block->count, &del_ace);
705
706 return 0;
707 }
708
ocelot_ace_rule_stats_update(struct ocelot_ace_rule * rule)709 int ocelot_ace_rule_stats_update(struct ocelot_ace_rule *rule)
710 {
711 struct ocelot_ace_rule *tmp;
712 int index;
713
714 index = ocelot_ace_rule_get_index_id(acl_block, rule);
715 is2_entry_get(rule, index);
716
717 /* After we get the result we need to clear the counters */
718 tmp = ocelot_ace_rule_get_rule_index(acl_block, index);
719 tmp->stats.pkts = 0;
720 is2_entry_set(rule->port->ocelot, index, tmp);
721
722 return 0;
723 }
724
ocelot_acl_block_create(struct ocelot * ocelot)725 static struct ocelot_acl_block *ocelot_acl_block_create(struct ocelot *ocelot)
726 {
727 struct ocelot_acl_block *block;
728
729 block = kzalloc(sizeof(*block), GFP_KERNEL);
730 if (!block)
731 return NULL;
732
733 INIT_LIST_HEAD(&block->rules);
734 block->count = 0;
735 block->ocelot = ocelot;
736
737 return block;
738 }
739
ocelot_acl_block_destroy(struct ocelot_acl_block * block)740 static void ocelot_acl_block_destroy(struct ocelot_acl_block *block)
741 {
742 kfree(block);
743 }
744
ocelot_ace_init(struct ocelot * ocelot)745 int ocelot_ace_init(struct ocelot *ocelot)
746 {
747 struct vcap_data data;
748
749 memset(&data, 0, sizeof(data));
750 vcap_entry2cache(ocelot, &data);
751 ocelot_write(ocelot, vcap_is2.entry_count, S2_CORE_MV_CFG);
752 vcap_cmd(ocelot, 0, VCAP_CMD_INITIALIZE, VCAP_SEL_ENTRY);
753
754 vcap_action2cache(ocelot, &data);
755 ocelot_write(ocelot, vcap_is2.action_count, S2_CORE_MV_CFG);
756 vcap_cmd(ocelot, 0, VCAP_CMD_INITIALIZE,
757 VCAP_SEL_ACTION | VCAP_SEL_COUNTER);
758
759 /* Create a policer that will drop the frames for the cpu.
760 * This policer will be used as action in the acl rules to drop
761 * frames.
762 */
763 ocelot_write_gix(ocelot, 0x299, ANA_POL_MODE_CFG,
764 OCELOT_POLICER_DISCARD);
765 ocelot_write_gix(ocelot, 0x1, ANA_POL_PIR_CFG,
766 OCELOT_POLICER_DISCARD);
767 ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_PIR_STATE,
768 OCELOT_POLICER_DISCARD);
769 ocelot_write_gix(ocelot, 0x0, ANA_POL_CIR_CFG,
770 OCELOT_POLICER_DISCARD);
771 ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_CIR_STATE,
772 OCELOT_POLICER_DISCARD);
773
774 acl_block = ocelot_acl_block_create(ocelot);
775
776 return 0;
777 }
778
ocelot_ace_deinit(void)779 void ocelot_ace_deinit(void)
780 {
781 ocelot_acl_block_destroy(acl_block);
782 }
783
