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 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 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 */ 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 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 } 104 105 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 } 122 123 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 } 147 148 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 */ 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 } 218 219 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 } 233 234 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 } 246 247 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 } 253 254 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 } 262 263 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 } 293 294 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 } 305 306 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 } 319 320 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 } 329 330 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_MIRROR_ENA, a->mirror_ena); 339 vcap_action_set(vcap, data, VCAP_IS2_ACT_POLICE_ENA, a->police_ena); 340 vcap_action_set(vcap, data, VCAP_IS2_ACT_POLICE_IDX, a->pol_ix); 341 vcap_action_set(vcap, data, VCAP_IS2_ACT_CPU_QU_NUM, a->cpu_qu_num); 342 vcap_action_set(vcap, data, VCAP_IS2_ACT_CPU_COPY_ENA, a->cpu_copy_ena); 343 } 344 345 static void is2_entry_set(struct ocelot *ocelot, int ix, 346 struct ocelot_vcap_filter *filter) 347 { 348 const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS2]; 349 struct ocelot_vcap_key_vlan *tag = &filter->vlan; 350 u32 val, msk, type, type_mask = 0xf, i, count; 351 struct ocelot_vcap_u64 payload; 352 struct vcap_data data; 353 int row = (ix / 2); 354 355 memset(&payload, 0, sizeof(payload)); 356 memset(&data, 0, sizeof(data)); 357 358 /* Read row */ 359 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL); 360 vcap_cache2entry(ocelot, vcap, &data); 361 vcap_cache2action(ocelot, vcap, &data); 362 363 data.tg_sw = VCAP_TG_HALF; 364 vcap_data_offset_get(vcap, &data, ix); 365 data.tg = (data.tg & ~data.tg_mask); 366 if (filter->prio != 0) 367 data.tg |= data.tg_value; 368 369 data.type = IS2_ACTION_TYPE_NORMAL; 370 371 vcap_key_set(vcap, &data, VCAP_IS2_HK_PAG, filter->pag, 0xff); 372 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_FIRST, 373 (filter->lookup == 0) ? OCELOT_VCAP_BIT_1 : 374 OCELOT_VCAP_BIT_0); 375 vcap_key_set(vcap, &data, VCAP_IS2_HK_IGR_PORT_MASK, 0, 376 ~filter->ingress_port_mask); 377 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_FIRST, OCELOT_VCAP_BIT_ANY); 378 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_HOST_MATCH, 379 OCELOT_VCAP_BIT_ANY); 380 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L2_MC, filter->dmac_mc); 381 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L2_BC, filter->dmac_bc); 382 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_VLAN_TAGGED, tag->tagged); 383 vcap_key_set(vcap, &data, VCAP_IS2_HK_VID, 384 tag->vid.value, tag->vid.mask); 385 vcap_key_set(vcap, &data, VCAP_IS2_HK_PCP, 386 tag->pcp.value[0], tag->pcp.mask[0]); 387 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_DEI, tag->dei); 388 389 switch (filter->key_type) { 390 case OCELOT_VCAP_KEY_ETYPE: { 391 struct ocelot_vcap_key_etype *etype = &filter->key.etype; 392 393 type = IS2_TYPE_ETYPE; 394 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC, 395 etype->dmac.value, etype->dmac.mask); 396 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC, 397 etype->smac.value, etype->smac.mask); 398 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_ETYPE, 399 etype->etype.value, etype->etype.mask); 400 /* Clear unused bits */ 401 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0, 402 0, 0); 403 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD1, 404 0, 0); 405 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD2, 406 0, 0); 407 vcap_key_bytes_set(vcap, &data, 408 VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0, 409 etype->data.value, etype->data.mask); 410 break; 411 } 412 case OCELOT_VCAP_KEY_LLC: { 413 struct ocelot_vcap_key_llc *llc = &filter->key.llc; 414 415 type = IS2_TYPE_LLC; 416 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC, 417 llc->dmac.value, llc->dmac.mask); 418 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC, 419 llc->smac.value, llc->smac.mask); 420 for (i = 0; i < 4; i++) { 421 payload.value[i] = llc->llc.value[i]; 422 payload.mask[i] = llc->llc.mask[i]; 423 } 424 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_LLC_L2_LLC, 425 payload.value, payload.mask); 426 break; 427 } 428 case OCELOT_VCAP_KEY_SNAP: { 429 struct ocelot_vcap_key_snap *snap = &filter->key.snap; 430 431 type = IS2_TYPE_SNAP; 432 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC, 433 snap->dmac.value, snap->dmac.mask); 434 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC, 435 snap->smac.value, snap->smac.mask); 436 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_SNAP_L2_SNAP, 437 filter->key.snap.snap.value, 438 filter->key.snap.snap.mask); 439 break; 440 } 441 case OCELOT_VCAP_KEY_ARP: { 442 struct ocelot_vcap_key_arp *arp = &filter->key.arp; 443 444 type = IS2_TYPE_ARP; 445 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_SMAC, 446 arp->smac.value, arp->smac.mask); 447 vcap_key_bit_set(vcap, &data, 448 VCAP_IS2_HK_MAC_ARP_ADDR_SPACE_OK, 449 arp->ethernet); 450 vcap_key_bit_set(vcap, &data, 451 VCAP_IS2_HK_MAC_ARP_PROTO_SPACE_OK, 452 arp->ip); 453 vcap_key_bit_set(vcap, &data, 454 VCAP_IS2_HK_MAC_ARP_LEN_OK, 455 arp->length); 456 vcap_key_bit_set(vcap, &data, 457 VCAP_IS2_HK_MAC_ARP_TARGET_MATCH, 458 arp->dmac_match); 459 vcap_key_bit_set(vcap, &data, 460 VCAP_IS2_HK_MAC_ARP_SENDER_MATCH, 461 arp->smac_match); 462 vcap_key_bit_set(vcap, &data, 463 VCAP_IS2_HK_MAC_ARP_OPCODE_UNKNOWN, 464 arp->unknown); 465 466 /* OPCODE is inverse, bit 0 is reply flag, bit 1 is RARP flag */ 467 val = ((arp->req == OCELOT_VCAP_BIT_0 ? 1 : 0) | 468 (arp->arp == OCELOT_VCAP_BIT_0 ? 2 : 0)); 469 msk = ((arp->req == OCELOT_VCAP_BIT_ANY ? 0 : 1) | 470 (arp->arp == OCELOT_VCAP_BIT_ANY ? 0 : 2)); 471 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_OPCODE, 472 val, msk); 473 vcap_key_bytes_set(vcap, &data, 474 VCAP_IS2_HK_MAC_ARP_L3_IP4_DIP, 475 arp->dip.value.addr, arp->dip.mask.addr); 476 vcap_key_bytes_set(vcap, &data, 477 VCAP_IS2_HK_MAC_ARP_L3_IP4_SIP, 478 arp->sip.value.addr, arp->sip.mask.addr); 479 vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_DIP_EQ_SIP, 480 0, 0); 481 break; 482 } 483 case OCELOT_VCAP_KEY_IPV4: 484 case OCELOT_VCAP_KEY_IPV6: { 485 enum ocelot_vcap_bit sip_eq_dip, sport_eq_dport, seq_zero, tcp; 486 enum ocelot_vcap_bit ttl, fragment, options, tcp_ack, tcp_urg; 487 enum ocelot_vcap_bit tcp_fin, tcp_syn, tcp_rst, tcp_psh; 488 struct ocelot_vcap_key_ipv4 *ipv4 = NULL; 489 struct ocelot_vcap_key_ipv6 *ipv6 = NULL; 490 struct ocelot_vcap_udp_tcp *sport, *dport; 491 struct ocelot_vcap_ipv4 sip, dip; 492 struct ocelot_vcap_u8 proto, ds; 493 struct ocelot_vcap_u48 *ip_data; 494 495 if (filter->key_type == OCELOT_VCAP_KEY_IPV4) { 496 ipv4 = &filter->key.ipv4; 497 ttl = ipv4->ttl; 498 fragment = ipv4->fragment; 499 options = ipv4->options; 500 proto = ipv4->proto; 501 ds = ipv4->ds; 502 ip_data = &ipv4->data; 503 sip = ipv4->sip; 504 dip = ipv4->dip; 505 sport = &ipv4->sport; 506 dport = &ipv4->dport; 507 tcp_fin = ipv4->tcp_fin; 508 tcp_syn = ipv4->tcp_syn; 509 tcp_rst = ipv4->tcp_rst; 510 tcp_psh = ipv4->tcp_psh; 511 tcp_ack = ipv4->tcp_ack; 512 tcp_urg = ipv4->tcp_urg; 513 sip_eq_dip = ipv4->sip_eq_dip; 514 sport_eq_dport = ipv4->sport_eq_dport; 515 seq_zero = ipv4->seq_zero; 516 } else { 517 ipv6 = &filter->key.ipv6; 518 ttl = ipv6->ttl; 519 fragment = OCELOT_VCAP_BIT_ANY; 520 options = OCELOT_VCAP_BIT_ANY; 521 proto = ipv6->proto; 522 ds = ipv6->ds; 523 ip_data = &ipv6->data; 524 for (i = 0; i < 8; i++) { 525 val = ipv6->sip.value[i + 8]; 526 msk = ipv6->sip.mask[i + 8]; 527 if (i < 4) { 528 dip.value.addr[i] = val; 529 dip.mask.addr[i] = msk; 530 } else { 531 sip.value.addr[i - 4] = val; 532 sip.mask.addr[i - 4] = msk; 533 } 534 } 535 sport = &ipv6->sport; 536 dport = &ipv6->dport; 537 tcp_fin = ipv6->tcp_fin; 538 tcp_syn = ipv6->tcp_syn; 539 tcp_rst = ipv6->tcp_rst; 540 tcp_psh = ipv6->tcp_psh; 541 tcp_ack = ipv6->tcp_ack; 542 tcp_urg = ipv6->tcp_urg; 543 sip_eq_dip = ipv6->sip_eq_dip; 544 sport_eq_dport = ipv6->sport_eq_dport; 545 seq_zero = ipv6->seq_zero; 546 } 547 548 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_IP4, 549 ipv4 ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0); 550 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L3_FRAGMENT, 551 fragment); 552 vcap_key_set(vcap, &data, VCAP_IS2_HK_L3_FRAG_OFS_GT0, 0, 0); 553 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L3_OPTIONS, 554 options); 555 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_IP4_L3_TTL_GT0, 556 ttl); 557 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_TOS, 558 ds.value, ds.mask); 559 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_IP4_DIP, 560 dip.value.addr, dip.mask.addr); 561 vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_IP4_SIP, 562 sip.value.addr, sip.mask.addr); 563 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_DIP_EQ_SIP, 564 sip_eq_dip); 565 val = proto.value[0]; 566 msk = proto.mask[0]; 567 type = IS2_TYPE_IP_UDP_TCP; 568 if (msk == 0xff && (val == IPPROTO_TCP || val == IPPROTO_UDP)) { 569 /* UDP/TCP protocol match */ 570 tcp = (val == IPPROTO_TCP ? 571 OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0); 572 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_TCP, tcp); 573 vcap_key_l4_port_set(vcap, &data, 574 VCAP_IS2_HK_L4_DPORT, dport); 575 vcap_key_l4_port_set(vcap, &data, 576 VCAP_IS2_HK_L4_SPORT, sport); 577 vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_RNG, 0, 0); 578 vcap_key_bit_set(vcap, &data, 579 VCAP_IS2_HK_L4_SPORT_EQ_DPORT, 580 sport_eq_dport); 581 vcap_key_bit_set(vcap, &data, 582 VCAP_IS2_HK_L4_SEQUENCE_EQ0, 583 seq_zero); 584 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_FIN, 585 tcp_fin); 586 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_SYN, 587 tcp_syn); 588 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_RST, 589 tcp_rst); 590 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_PSH, 591 tcp_psh); 592 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_ACK, 593 tcp_ack); 594 vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_URG, 595 tcp_urg); 596 vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_1588_DOM, 597 0, 0); 598 vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_1588_VER, 599 0, 0); 600 } else { 601 if (msk == 0) { 602 /* Any IP protocol match */ 603 type_mask = IS2_TYPE_MASK_IP_ANY; 604 } else { 605 /* Non-UDP/TCP protocol match */ 606 type = IS2_TYPE_IP_OTHER; 607 for (i = 0; i < 6; i++) { 608 payload.value[i] = ip_data->value[i]; 609 payload.mask[i] = ip_data->mask[i]; 610 } 611 } 612 vcap_key_bytes_set(vcap, &data, 613 VCAP_IS2_HK_IP4_L3_PROTO, 614 proto.value, proto.mask); 615 vcap_key_bytes_set(vcap, &data, 616 VCAP_IS2_HK_L3_PAYLOAD, 617 payload.value, payload.mask); 618 } 619 break; 620 } 621 case OCELOT_VCAP_KEY_ANY: 622 default: 623 type = 0; 624 type_mask = 0; 625 count = vcap->entry_width / 2; 626 /* Iterate over the non-common part of the key and 627 * clear entry data 628 */ 629 for (i = vcap->keys[VCAP_IS2_HK_L2_DMAC].offset; 630 i < count; i += ENTRY_WIDTH) { 631 vcap_key_field_set(&data, i, min(32u, count - i), 0, 0); 632 } 633 break; 634 } 635 636 vcap_key_set(vcap, &data, VCAP_IS2_TYPE, type, type_mask); 637 is2_action_set(ocelot, &data, filter); 638 vcap_data_set(data.counter, data.counter_offset, 639 vcap->counter_width, filter->stats.pkts); 640 641 /* Write row */ 642 vcap_entry2cache(ocelot, vcap, &data); 643 vcap_action2cache(ocelot, vcap, &data); 644 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL); 645 } 646 647 static void is1_action_set(struct ocelot *ocelot, struct vcap_data *data, 648 const struct ocelot_vcap_filter *filter) 649 { 650 const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS1]; 651 const struct ocelot_vcap_action *a = &filter->action; 652 653 vcap_action_set(vcap, data, VCAP_IS1_ACT_VID_REPLACE_ENA, 654 a->vid_replace_ena); 655 vcap_action_set(vcap, data, VCAP_IS1_ACT_VID_ADD_VAL, a->vid); 656 vcap_action_set(vcap, data, VCAP_IS1_ACT_VLAN_POP_CNT_ENA, 657 a->vlan_pop_cnt_ena); 658 vcap_action_set(vcap, data, VCAP_IS1_ACT_VLAN_POP_CNT, 659 a->vlan_pop_cnt); 660 vcap_action_set(vcap, data, VCAP_IS1_ACT_PCP_DEI_ENA, a->pcp_dei_ena); 661 vcap_action_set(vcap, data, VCAP_IS1_ACT_PCP_VAL, a->pcp); 662 vcap_action_set(vcap, data, VCAP_IS1_ACT_DEI_VAL, a->dei); 663 vcap_action_set(vcap, data, VCAP_IS1_ACT_QOS_ENA, a->qos_ena); 664 vcap_action_set(vcap, data, VCAP_IS1_ACT_QOS_VAL, a->qos_val); 665 vcap_action_set(vcap, data, VCAP_IS1_ACT_PAG_OVERRIDE_MASK, 666 a->pag_override_mask); 667 vcap_action_set(vcap, data, VCAP_IS1_ACT_PAG_VAL, a->pag_val); 668 } 669 670 static void is1_entry_set(struct ocelot *ocelot, int ix, 671 struct ocelot_vcap_filter *filter) 672 { 673 const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS1]; 674 struct ocelot_vcap_key_vlan *tag = &filter->vlan; 675 struct vcap_data data; 676 int row = ix / 2; 677 u32 type; 678 679 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 } 780 781 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 } 808 809 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 vcap_data data; 815 int row = ix; 816 817 memset(&data, 0, sizeof(data)); 818 819 /* Read row */ 820 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL); 821 vcap_cache2entry(ocelot, vcap, &data); 822 vcap_cache2action(ocelot, vcap, &data); 823 824 data.tg_sw = VCAP_TG_FULL; 825 data.type = ES0_ACTION_TYPE_NORMAL; 826 vcap_data_offset_get(vcap, &data, ix); 827 data.tg = (data.tg & ~data.tg_mask); 828 if (filter->prio != 0) 829 data.tg |= data.tg_value; 830 831 vcap_key_set(vcap, &data, VCAP_ES0_IGR_PORT, filter->ingress_port.value, 832 filter->ingress_port.mask); 833 vcap_key_set(vcap, &data, VCAP_ES0_EGR_PORT, filter->egress_port.value, 834 filter->egress_port.mask); 835 vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_MC, filter->dmac_mc); 836 vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_BC, filter->dmac_bc); 837 vcap_key_set(vcap, &data, VCAP_ES0_VID, 838 tag->vid.value, tag->vid.mask); 839 vcap_key_set(vcap, &data, VCAP_ES0_PCP, 840 tag->pcp.value[0], tag->pcp.mask[0]); 841 842 es0_action_set(ocelot, &data, filter); 843 vcap_data_set(data.counter, data.counter_offset, 844 vcap->counter_width, filter->stats.pkts); 845 846 /* Write row */ 847 vcap_entry2cache(ocelot, vcap, &data); 848 vcap_action2cache(ocelot, vcap, &data); 849 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL); 850 } 851 852 static void vcap_entry_get(struct ocelot *ocelot, int ix, 853 struct ocelot_vcap_filter *filter) 854 { 855 const struct vcap_props *vcap = &ocelot->vcap[filter->block_id]; 856 struct vcap_data data; 857 int row, count; 858 u32 cnt; 859 860 if (filter->block_id == VCAP_ES0) 861 data.tg_sw = VCAP_TG_FULL; 862 else 863 data.tg_sw = VCAP_TG_HALF; 864 865 count = (1 << (data.tg_sw - 1)); 866 row = (ix / count); 867 vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_COUNTER); 868 vcap_cache2action(ocelot, vcap, &data); 869 vcap_data_offset_get(vcap, &data, ix); 870 cnt = vcap_data_get(data.counter, data.counter_offset, 871 vcap->counter_width); 872 873 filter->stats.pkts = cnt; 874 } 875 876 static void vcap_entry_set(struct ocelot *ocelot, int ix, 877 struct ocelot_vcap_filter *filter) 878 { 879 if (filter->block_id == VCAP_IS1) 880 return is1_entry_set(ocelot, ix, filter); 881 if (filter->block_id == VCAP_IS2) 882 return is2_entry_set(ocelot, ix, filter); 883 if (filter->block_id == VCAP_ES0) 884 return es0_entry_set(ocelot, ix, filter); 885 } 886 887 struct vcap_policer_entry { 888 struct list_head list; 889 refcount_t refcount; 890 u32 pol_ix; 891 }; 892 893 int ocelot_vcap_policer_add(struct ocelot *ocelot, u32 pol_ix, 894 struct ocelot_policer *pol) 895 { 896 struct qos_policer_conf pp = { 0 }; 897 struct vcap_policer_entry *tmp; 898 int ret; 899 900 if (!pol) 901 return -EINVAL; 902 903 pp.mode = MSCC_QOS_RATE_MODE_DATA; 904 pp.pir = pol->rate; 905 pp.pbs = pol->burst; 906 907 list_for_each_entry(tmp, &ocelot->vcap_pol.pol_list, list) 908 if (tmp->pol_ix == pol_ix) { 909 refcount_inc(&tmp->refcount); 910 return 0; 911 } 912 913 tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); 914 if (!tmp) 915 return -ENOMEM; 916 917 ret = qos_policer_conf_set(ocelot, 0, pol_ix, &pp); 918 if (ret) { 919 kfree(tmp); 920 return ret; 921 } 922 923 tmp->pol_ix = pol_ix; 924 refcount_set(&tmp->refcount, 1); 925 list_add_tail(&tmp->list, &ocelot->vcap_pol.pol_list); 926 927 return 0; 928 } 929 EXPORT_SYMBOL(ocelot_vcap_policer_add); 930 931 int ocelot_vcap_policer_del(struct ocelot *ocelot, u32 pol_ix) 932 { 933 struct qos_policer_conf pp = {0}; 934 struct vcap_policer_entry *tmp, *n; 935 u8 z = 0; 936 937 list_for_each_entry_safe(tmp, n, &ocelot->vcap_pol.pol_list, list) 938 if (tmp->pol_ix == pol_ix) { 939 z = refcount_dec_and_test(&tmp->refcount); 940 if (z) { 941 list_del(&tmp->list); 942 kfree(tmp); 943 } 944 } 945 946 if (z) { 947 pp.mode = MSCC_QOS_RATE_MODE_DISABLED; 948 return qos_policer_conf_set(ocelot, 0, pol_ix, &pp); 949 } 950 951 return 0; 952 } 953 EXPORT_SYMBOL(ocelot_vcap_policer_del); 954 955 static int 956 ocelot_vcap_filter_add_aux_resources(struct ocelot *ocelot, 957 struct ocelot_vcap_filter *filter, 958 struct netlink_ext_ack *extack) 959 { 960 struct ocelot_mirror *m; 961 int ret; 962 963 if (filter->block_id == VCAP_IS2 && filter->action.mirror_ena) { 964 m = ocelot_mirror_get(ocelot, filter->egress_port.value, 965 extack); 966 if (IS_ERR(m)) 967 return PTR_ERR(m); 968 } 969 970 if (filter->block_id == VCAP_IS2 && filter->action.police_ena) { 971 ret = ocelot_vcap_policer_add(ocelot, filter->action.pol_ix, 972 &filter->action.pol); 973 if (ret) 974 return ret; 975 } 976 977 return 0; 978 } 979 980 static void 981 ocelot_vcap_filter_del_aux_resources(struct ocelot *ocelot, 982 struct ocelot_vcap_filter *filter) 983 { 984 if (filter->block_id == VCAP_IS2 && filter->action.police_ena) 985 ocelot_vcap_policer_del(ocelot, filter->action.pol_ix); 986 987 if (filter->block_id == VCAP_IS2 && filter->action.mirror_ena) 988 ocelot_mirror_put(ocelot); 989 } 990 991 static int ocelot_vcap_filter_add_to_block(struct ocelot *ocelot, 992 struct ocelot_vcap_block *block, 993 struct ocelot_vcap_filter *filter, 994 struct netlink_ext_ack *extack) 995 { 996 struct ocelot_vcap_filter *tmp; 997 struct list_head *pos, *n; 998 int ret; 999 1000 ret = ocelot_vcap_filter_add_aux_resources(ocelot, filter, extack); 1001 if (ret) 1002 return ret; 1003 1004 block->count++; 1005 1006 if (list_empty(&block->rules)) { 1007 list_add(&filter->list, &block->rules); 1008 return 0; 1009 } 1010 1011 list_for_each_safe(pos, n, &block->rules) { 1012 tmp = list_entry(pos, struct ocelot_vcap_filter, list); 1013 if (filter->prio < tmp->prio) 1014 break; 1015 } 1016 list_add(&filter->list, pos->prev); 1017 1018 return 0; 1019 } 1020 1021 static bool ocelot_vcap_filter_equal(const struct ocelot_vcap_filter *a, 1022 const struct ocelot_vcap_filter *b) 1023 { 1024 return !memcmp(&a->id, &b->id, sizeof(struct ocelot_vcap_id)); 1025 } 1026 1027 static int ocelot_vcap_block_get_filter_index(struct ocelot_vcap_block *block, 1028 struct ocelot_vcap_filter *filter) 1029 { 1030 struct ocelot_vcap_filter *tmp; 1031 int index = 0; 1032 1033 list_for_each_entry(tmp, &block->rules, list) { 1034 if (ocelot_vcap_filter_equal(filter, tmp)) 1035 return index; 1036 index++; 1037 } 1038 1039 return -ENOENT; 1040 } 1041 1042 static struct ocelot_vcap_filter* 1043 ocelot_vcap_block_find_filter_by_index(struct ocelot_vcap_block *block, 1044 int index) 1045 { 1046 struct ocelot_vcap_filter *tmp; 1047 int i = 0; 1048 1049 list_for_each_entry(tmp, &block->rules, list) { 1050 if (i == index) 1051 return tmp; 1052 ++i; 1053 } 1054 1055 return NULL; 1056 } 1057 1058 struct ocelot_vcap_filter * 1059 ocelot_vcap_block_find_filter_by_id(struct ocelot_vcap_block *block, 1060 unsigned long cookie, bool tc_offload) 1061 { 1062 struct ocelot_vcap_filter *filter; 1063 1064 list_for_each_entry(filter, &block->rules, list) 1065 if (filter->id.tc_offload == tc_offload && 1066 filter->id.cookie == cookie) 1067 return filter; 1068 1069 return NULL; 1070 } 1071 EXPORT_SYMBOL(ocelot_vcap_block_find_filter_by_id); 1072 1073 /* If @on=false, then SNAP, ARP, IP and OAM frames will not match on keys based 1074 * on destination and source MAC addresses, but only on higher-level protocol 1075 * information. The only frame types to match on keys containing MAC addresses 1076 * in this case are non-SNAP, non-ARP, non-IP and non-OAM frames. 1077 * 1078 * If @on=true, then the above frame types (SNAP, ARP, IP and OAM) will match 1079 * on MAC_ETYPE keys such as destination and source MAC on this ingress port. 1080 * However the setting has the side effect of making these frames not matching 1081 * on any _other_ keys than MAC_ETYPE ones. 1082 */ 1083 static void ocelot_match_all_as_mac_etype(struct ocelot *ocelot, int port, 1084 int lookup, bool on) 1085 { 1086 u32 val = 0; 1087 1088 if (on) 1089 val = ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) | 1090 ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) | 1091 ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) | 1092 ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) | 1093 ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup)); 1094 1095 ocelot_rmw_gix(ocelot, val, 1096 ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) | 1097 ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) | 1098 ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) | 1099 ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) | 1100 ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup)), 1101 ANA_PORT_VCAP_S2_CFG, port); 1102 } 1103 1104 static bool 1105 ocelot_vcap_is_problematic_mac_etype(struct ocelot_vcap_filter *filter) 1106 { 1107 u16 proto, mask; 1108 1109 if (filter->key_type != OCELOT_VCAP_KEY_ETYPE) 1110 return false; 1111 1112 proto = ntohs(*(__be16 *)filter->key.etype.etype.value); 1113 mask = ntohs(*(__be16 *)filter->key.etype.etype.mask); 1114 1115 /* ETH_P_ALL match, so all protocols below are included */ 1116 if (mask == 0) 1117 return true; 1118 if (proto == ETH_P_ARP) 1119 return true; 1120 if (proto == ETH_P_IP) 1121 return true; 1122 if (proto == ETH_P_IPV6) 1123 return true; 1124 1125 return false; 1126 } 1127 1128 static bool 1129 ocelot_vcap_is_problematic_non_mac_etype(struct ocelot_vcap_filter *filter) 1130 { 1131 if (filter->key_type == OCELOT_VCAP_KEY_SNAP) 1132 return true; 1133 if (filter->key_type == OCELOT_VCAP_KEY_ARP) 1134 return true; 1135 if (filter->key_type == OCELOT_VCAP_KEY_IPV4) 1136 return true; 1137 if (filter->key_type == OCELOT_VCAP_KEY_IPV6) 1138 return true; 1139 return false; 1140 } 1141 1142 static bool 1143 ocelot_exclusive_mac_etype_filter_rules(struct ocelot *ocelot, 1144 struct ocelot_vcap_filter *filter) 1145 { 1146 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id]; 1147 struct ocelot_vcap_filter *tmp; 1148 unsigned long port; 1149 int i; 1150 1151 /* We only have the S2_IP_TCPUDP_DIS set of knobs for VCAP IS2 */ 1152 if (filter->block_id != VCAP_IS2) 1153 return true; 1154 1155 if (ocelot_vcap_is_problematic_mac_etype(filter)) { 1156 /* Search for any non-MAC_ETYPE rules on the port */ 1157 for (i = 0; i < block->count; i++) { 1158 tmp = ocelot_vcap_block_find_filter_by_index(block, i); 1159 if (tmp->ingress_port_mask & filter->ingress_port_mask && 1160 tmp->lookup == filter->lookup && 1161 ocelot_vcap_is_problematic_non_mac_etype(tmp)) 1162 return false; 1163 } 1164 1165 for_each_set_bit(port, &filter->ingress_port_mask, 1166 ocelot->num_phys_ports) 1167 ocelot_match_all_as_mac_etype(ocelot, port, 1168 filter->lookup, true); 1169 } else if (ocelot_vcap_is_problematic_non_mac_etype(filter)) { 1170 /* Search for any MAC_ETYPE rules on the port */ 1171 for (i = 0; i < block->count; i++) { 1172 tmp = ocelot_vcap_block_find_filter_by_index(block, i); 1173 if (tmp->ingress_port_mask & filter->ingress_port_mask && 1174 tmp->lookup == filter->lookup && 1175 ocelot_vcap_is_problematic_mac_etype(tmp)) 1176 return false; 1177 } 1178 1179 for_each_set_bit(port, &filter->ingress_port_mask, 1180 ocelot->num_phys_ports) 1181 ocelot_match_all_as_mac_etype(ocelot, port, 1182 filter->lookup, false); 1183 } 1184 1185 return true; 1186 } 1187 1188 int ocelot_vcap_filter_add(struct ocelot *ocelot, 1189 struct ocelot_vcap_filter *filter, 1190 struct netlink_ext_ack *extack) 1191 { 1192 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id]; 1193 int i, index, ret; 1194 1195 if (!ocelot_exclusive_mac_etype_filter_rules(ocelot, filter)) { 1196 NL_SET_ERR_MSG_MOD(extack, 1197 "Cannot mix MAC_ETYPE with non-MAC_ETYPE rules, use the other IS2 lookup"); 1198 return -EBUSY; 1199 } 1200 1201 /* Add filter to the linked list */ 1202 ret = ocelot_vcap_filter_add_to_block(ocelot, block, filter, extack); 1203 if (ret) 1204 return ret; 1205 1206 /* Get the index of the inserted filter */ 1207 index = ocelot_vcap_block_get_filter_index(block, filter); 1208 if (index < 0) 1209 return index; 1210 1211 /* Move down the rules to make place for the new filter */ 1212 for (i = block->count - 1; i > index; i--) { 1213 struct ocelot_vcap_filter *tmp; 1214 1215 tmp = ocelot_vcap_block_find_filter_by_index(block, i); 1216 vcap_entry_set(ocelot, i, tmp); 1217 } 1218 1219 /* Now insert the new filter */ 1220 vcap_entry_set(ocelot, index, filter); 1221 return 0; 1222 } 1223 EXPORT_SYMBOL(ocelot_vcap_filter_add); 1224 1225 static void ocelot_vcap_block_remove_filter(struct ocelot *ocelot, 1226 struct ocelot_vcap_block *block, 1227 struct ocelot_vcap_filter *filter) 1228 { 1229 struct ocelot_vcap_filter *tmp, *n; 1230 1231 list_for_each_entry_safe(tmp, n, &block->rules, list) { 1232 if (ocelot_vcap_filter_equal(filter, tmp)) { 1233 ocelot_vcap_filter_del_aux_resources(ocelot, tmp); 1234 list_del(&tmp->list); 1235 kfree(tmp); 1236 } 1237 } 1238 1239 block->count--; 1240 } 1241 1242 int ocelot_vcap_filter_del(struct ocelot *ocelot, 1243 struct ocelot_vcap_filter *filter) 1244 { 1245 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id]; 1246 struct ocelot_vcap_filter del_filter; 1247 int i, index; 1248 1249 memset(&del_filter, 0, sizeof(del_filter)); 1250 1251 /* Gets index of the filter */ 1252 index = ocelot_vcap_block_get_filter_index(block, filter); 1253 if (index < 0) 1254 return index; 1255 1256 /* Delete filter */ 1257 ocelot_vcap_block_remove_filter(ocelot, block, filter); 1258 1259 /* Move up all the blocks over the deleted filter */ 1260 for (i = index; i < block->count; i++) { 1261 struct ocelot_vcap_filter *tmp; 1262 1263 tmp = ocelot_vcap_block_find_filter_by_index(block, i); 1264 vcap_entry_set(ocelot, i, tmp); 1265 } 1266 1267 /* Now delete the last filter, because it is duplicated */ 1268 vcap_entry_set(ocelot, block->count, &del_filter); 1269 1270 return 0; 1271 } 1272 EXPORT_SYMBOL(ocelot_vcap_filter_del); 1273 1274 int ocelot_vcap_filter_replace(struct ocelot *ocelot, 1275 struct ocelot_vcap_filter *filter) 1276 { 1277 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id]; 1278 int index; 1279 1280 index = ocelot_vcap_block_get_filter_index(block, filter); 1281 if (index < 0) 1282 return index; 1283 1284 vcap_entry_set(ocelot, index, filter); 1285 1286 return 0; 1287 } 1288 EXPORT_SYMBOL(ocelot_vcap_filter_replace); 1289 1290 int ocelot_vcap_filter_stats_update(struct ocelot *ocelot, 1291 struct ocelot_vcap_filter *filter) 1292 { 1293 struct ocelot_vcap_block *block = &ocelot->block[filter->block_id]; 1294 struct ocelot_vcap_filter tmp; 1295 int index; 1296 1297 index = ocelot_vcap_block_get_filter_index(block, filter); 1298 if (index < 0) 1299 return index; 1300 1301 vcap_entry_get(ocelot, index, filter); 1302 1303 /* After we get the result we need to clear the counters */ 1304 tmp = *filter; 1305 tmp.stats.pkts = 0; 1306 vcap_entry_set(ocelot, index, &tmp); 1307 1308 return 0; 1309 } 1310 1311 static void ocelot_vcap_init_one(struct ocelot *ocelot, 1312 const struct vcap_props *vcap) 1313 { 1314 struct vcap_data data; 1315 1316 memset(&data, 0, sizeof(data)); 1317 1318 vcap_entry2cache(ocelot, vcap, &data); 1319 ocelot_target_write(ocelot, vcap->target, vcap->entry_count, 1320 VCAP_CORE_MV_CFG); 1321 vcap_cmd(ocelot, vcap, 0, VCAP_CMD_INITIALIZE, VCAP_SEL_ENTRY); 1322 1323 vcap_action2cache(ocelot, vcap, &data); 1324 ocelot_target_write(ocelot, vcap->target, vcap->action_count, 1325 VCAP_CORE_MV_CFG); 1326 vcap_cmd(ocelot, vcap, 0, VCAP_CMD_INITIALIZE, 1327 VCAP_SEL_ACTION | VCAP_SEL_COUNTER); 1328 } 1329 1330 static void ocelot_vcap_detect_constants(struct ocelot *ocelot, 1331 struct vcap_props *vcap) 1332 { 1333 int counter_memory_width; 1334 int num_default_actions; 1335 int version; 1336 1337 version = ocelot_target_read(ocelot, vcap->target, 1338 VCAP_CONST_VCAP_VER); 1339 /* Only version 0 VCAP supported for now */ 1340 if (WARN_ON(version != 0)) 1341 return; 1342 1343 /* Width in bits of type-group field */ 1344 vcap->tg_width = ocelot_target_read(ocelot, vcap->target, 1345 VCAP_CONST_ENTRY_TG_WIDTH); 1346 /* Number of subwords per TCAM row */ 1347 vcap->sw_count = ocelot_target_read(ocelot, vcap->target, 1348 VCAP_CONST_ENTRY_SWCNT); 1349 /* Number of rows in TCAM. There can be this many full keys, or double 1350 * this number half keys, or 4 times this number quarter keys. 1351 */ 1352 vcap->entry_count = ocelot_target_read(ocelot, vcap->target, 1353 VCAP_CONST_ENTRY_CNT); 1354 /* Assuming there are 4 subwords per TCAM row, their layout in the 1355 * actual TCAM (not in the cache) would be: 1356 * 1357 * | SW 3 | TG 3 | SW 2 | TG 2 | SW 1 | TG 1 | SW 0 | TG 0 | 1358 * 1359 * (where SW=subword and TG=Type-Group). 1360 * 1361 * What VCAP_CONST_ENTRY_CNT is giving us is the width of one full TCAM 1362 * row. But when software accesses the TCAM through the cache 1363 * registers, the Type-Group values are written through another set of 1364 * registers VCAP_TG_DAT, and therefore, it appears as though the 4 1365 * subwords are contiguous in the cache memory. 1366 * Important mention: regardless of the number of key entries per row 1367 * (and therefore of key size: 1 full key or 2 half keys or 4 quarter 1368 * keys), software always has to configure 4 Type-Group values. For 1369 * example, in the case of 1 full key, the driver needs to set all 4 1370 * Type-Group to be full key. 1371 * 1372 * For this reason, we need to fix up the value that the hardware is 1373 * giving us. We don't actually care about the width of the entry in 1374 * the TCAM. What we care about is the width of the entry in the cache 1375 * registers, which is how we get to interact with it. And since the 1376 * VCAP_ENTRY_DAT cache registers access only the subwords and not the 1377 * Type-Groups, this means we need to subtract the width of the 1378 * Type-Groups when packing and unpacking key entry data in a TCAM row. 1379 */ 1380 vcap->entry_width = ocelot_target_read(ocelot, vcap->target, 1381 VCAP_CONST_ENTRY_WIDTH); 1382 vcap->entry_width -= vcap->tg_width * vcap->sw_count; 1383 num_default_actions = ocelot_target_read(ocelot, vcap->target, 1384 VCAP_CONST_ACTION_DEF_CNT); 1385 vcap->action_count = vcap->entry_count + num_default_actions; 1386 vcap->action_width = ocelot_target_read(ocelot, vcap->target, 1387 VCAP_CONST_ACTION_WIDTH); 1388 /* The width of the counter memory, this is the complete width of all 1389 * counter-fields associated with one full-word entry. There is one 1390 * counter per entry sub-word (see CAP_CORE::ENTRY_SWCNT for number of 1391 * subwords.) 1392 */ 1393 vcap->counter_words = vcap->sw_count; 1394 counter_memory_width = ocelot_target_read(ocelot, vcap->target, 1395 VCAP_CONST_CNT_WIDTH); 1396 vcap->counter_width = counter_memory_width / vcap->counter_words; 1397 } 1398 1399 int ocelot_vcap_init(struct ocelot *ocelot) 1400 { 1401 int i; 1402 1403 /* Create a policer that will drop the frames for the cpu. 1404 * This policer will be used as action in the acl rules to drop 1405 * frames. 1406 */ 1407 ocelot_write_gix(ocelot, 0x299, ANA_POL_MODE_CFG, 1408 OCELOT_POLICER_DISCARD); 1409 ocelot_write_gix(ocelot, 0x1, ANA_POL_PIR_CFG, 1410 OCELOT_POLICER_DISCARD); 1411 ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_PIR_STATE, 1412 OCELOT_POLICER_DISCARD); 1413 ocelot_write_gix(ocelot, 0x0, ANA_POL_CIR_CFG, 1414 OCELOT_POLICER_DISCARD); 1415 ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_CIR_STATE, 1416 OCELOT_POLICER_DISCARD); 1417 1418 for (i = 0; i < OCELOT_NUM_VCAP_BLOCKS; i++) { 1419 struct ocelot_vcap_block *block = &ocelot->block[i]; 1420 struct vcap_props *vcap = &ocelot->vcap[i]; 1421 1422 INIT_LIST_HEAD(&block->rules); 1423 1424 ocelot_vcap_detect_constants(ocelot, vcap); 1425 ocelot_vcap_init_one(ocelot, vcap); 1426 } 1427 1428 INIT_LIST_HEAD(&ocelot->dummy_rules); 1429 INIT_LIST_HEAD(&ocelot->traps); 1430 INIT_LIST_HEAD(&ocelot->vcap_pol.pol_list); 1431 1432 return 0; 1433 } 1434