1 // SPDX-License-Identifier: GPL-2.0 2 /* Marvell RVU Admin Function driver 3 * 4 * Copyright (C) 2020 Marvell. 5 */ 6 7 #include <linux/bitfield.h> 8 9 #include "rvu_struct.h" 10 #include "rvu_reg.h" 11 #include "rvu.h" 12 #include "npc.h" 13 #include "rvu_npc_fs.h" 14 #include "rvu_npc_hash.h" 15 16 static const char * const npc_flow_names[] = { 17 [NPC_DMAC] = "dmac", 18 [NPC_SMAC] = "smac", 19 [NPC_ETYPE] = "ether type", 20 [NPC_VLAN_ETYPE_CTAG] = "vlan ether type ctag", 21 [NPC_VLAN_ETYPE_STAG] = "vlan ether type stag", 22 [NPC_OUTER_VID] = "outer vlan id", 23 [NPC_INNER_VID] = "inner vlan id", 24 [NPC_TOS] = "tos", 25 [NPC_IPFRAG_IPV4] = "fragmented IPv4 header ", 26 [NPC_SIP_IPV4] = "ipv4 source ip", 27 [NPC_DIP_IPV4] = "ipv4 destination ip", 28 [NPC_IPFRAG_IPV6] = "fragmented IPv6 header ", 29 [NPC_SIP_IPV6] = "ipv6 source ip", 30 [NPC_DIP_IPV6] = "ipv6 destination ip", 31 [NPC_IPPROTO_TCP] = "ip proto tcp", 32 [NPC_IPPROTO_UDP] = "ip proto udp", 33 [NPC_IPPROTO_SCTP] = "ip proto sctp", 34 [NPC_IPPROTO_ICMP] = "ip proto icmp", 35 [NPC_IPPROTO_ICMP6] = "ip proto icmp6", 36 [NPC_IPPROTO_AH] = "ip proto AH", 37 [NPC_IPPROTO_ESP] = "ip proto ESP", 38 [NPC_SPORT_TCP] = "tcp source port", 39 [NPC_DPORT_TCP] = "tcp destination port", 40 [NPC_SPORT_UDP] = "udp source port", 41 [NPC_DPORT_UDP] = "udp destination port", 42 [NPC_SPORT_SCTP] = "sctp source port", 43 [NPC_DPORT_SCTP] = "sctp destination port", 44 [NPC_LXMB] = "Mcast/Bcast header ", 45 [NPC_IPSEC_SPI] = "SPI ", 46 [NPC_UNKNOWN] = "unknown", 47 }; 48 49 bool npc_is_feature_supported(struct rvu *rvu, u64 features, u8 intf) 50 { 51 struct npc_mcam *mcam = &rvu->hw->mcam; 52 u64 mcam_features; 53 u64 unsupported; 54 55 mcam_features = is_npc_intf_tx(intf) ? mcam->tx_features : mcam->rx_features; 56 unsupported = (mcam_features ^ features) & ~mcam_features; 57 58 /* Return false if at least one of the input flows is not extracted */ 59 return !unsupported; 60 } 61 62 const char *npc_get_field_name(u8 hdr) 63 { 64 if (hdr >= ARRAY_SIZE(npc_flow_names)) 65 return npc_flow_names[NPC_UNKNOWN]; 66 67 return npc_flow_names[hdr]; 68 } 69 70 /* Compute keyword masks and figure out the number of keywords a field 71 * spans in the key. 72 */ 73 static void npc_set_kw_masks(struct npc_mcam *mcam, u8 type, 74 u8 nr_bits, int start_kwi, int offset, u8 intf) 75 { 76 struct npc_key_field *field = &mcam->rx_key_fields[type]; 77 u8 bits_in_kw; 78 int max_kwi; 79 80 if (mcam->banks_per_entry == 1) 81 max_kwi = 1; /* NPC_MCAM_KEY_X1 */ 82 else if (mcam->banks_per_entry == 2) 83 max_kwi = 3; /* NPC_MCAM_KEY_X2 */ 84 else 85 max_kwi = 6; /* NPC_MCAM_KEY_X4 */ 86 87 if (is_npc_intf_tx(intf)) 88 field = &mcam->tx_key_fields[type]; 89 90 if (offset + nr_bits <= 64) { 91 /* one KW only */ 92 if (start_kwi > max_kwi) 93 return; 94 field->kw_mask[start_kwi] |= GENMASK_ULL(nr_bits - 1, 0) 95 << offset; 96 field->nr_kws = 1; 97 } else if (offset + nr_bits > 64 && 98 offset + nr_bits <= 128) { 99 /* two KWs */ 100 if (start_kwi + 1 > max_kwi) 101 return; 102 /* first KW mask */ 103 bits_in_kw = 64 - offset; 104 field->kw_mask[start_kwi] |= GENMASK_ULL(bits_in_kw - 1, 0) 105 << offset; 106 /* second KW mask i.e. mask for rest of bits */ 107 bits_in_kw = nr_bits + offset - 64; 108 field->kw_mask[start_kwi + 1] |= GENMASK_ULL(bits_in_kw - 1, 0); 109 field->nr_kws = 2; 110 } else { 111 /* three KWs */ 112 if (start_kwi + 2 > max_kwi) 113 return; 114 /* first KW mask */ 115 bits_in_kw = 64 - offset; 116 field->kw_mask[start_kwi] |= GENMASK_ULL(bits_in_kw - 1, 0) 117 << offset; 118 /* second KW mask */ 119 field->kw_mask[start_kwi + 1] = ~0ULL; 120 /* third KW mask i.e. mask for rest of bits */ 121 bits_in_kw = nr_bits + offset - 128; 122 field->kw_mask[start_kwi + 2] |= GENMASK_ULL(bits_in_kw - 1, 0); 123 field->nr_kws = 3; 124 } 125 } 126 127 /* Helper function to figure out whether field exists in the key */ 128 static bool npc_is_field_present(struct rvu *rvu, enum key_fields type, u8 intf) 129 { 130 struct npc_mcam *mcam = &rvu->hw->mcam; 131 struct npc_key_field *input; 132 133 input = &mcam->rx_key_fields[type]; 134 if (is_npc_intf_tx(intf)) 135 input = &mcam->tx_key_fields[type]; 136 137 return input->nr_kws > 0; 138 } 139 140 static bool npc_is_same(struct npc_key_field *input, 141 struct npc_key_field *field) 142 { 143 return memcmp(&input->layer_mdata, &field->layer_mdata, 144 sizeof(struct npc_layer_mdata)) == 0; 145 } 146 147 static void npc_set_layer_mdata(struct npc_mcam *mcam, enum key_fields type, 148 u64 cfg, u8 lid, u8 lt, u8 intf) 149 { 150 struct npc_key_field *input = &mcam->rx_key_fields[type]; 151 152 if (is_npc_intf_tx(intf)) 153 input = &mcam->tx_key_fields[type]; 154 155 input->layer_mdata.hdr = FIELD_GET(NPC_HDR_OFFSET, cfg); 156 input->layer_mdata.key = FIELD_GET(NPC_KEY_OFFSET, cfg); 157 input->layer_mdata.len = FIELD_GET(NPC_BYTESM, cfg) + 1; 158 input->layer_mdata.ltype = lt; 159 input->layer_mdata.lid = lid; 160 } 161 162 static bool npc_check_overlap_fields(struct npc_key_field *input1, 163 struct npc_key_field *input2) 164 { 165 int kwi; 166 167 /* Fields with same layer id and different ltypes are mutually 168 * exclusive hence they can be overlapped 169 */ 170 if (input1->layer_mdata.lid == input2->layer_mdata.lid && 171 input1->layer_mdata.ltype != input2->layer_mdata.ltype) 172 return false; 173 174 for (kwi = 0; kwi < NPC_MAX_KWS_IN_KEY; kwi++) { 175 if (input1->kw_mask[kwi] & input2->kw_mask[kwi]) 176 return true; 177 } 178 179 return false; 180 } 181 182 /* Helper function to check whether given field overlaps with any other fields 183 * in the key. Due to limitations on key size and the key extraction profile in 184 * use higher layers can overwrite lower layer's header fields. Hence overlap 185 * needs to be checked. 186 */ 187 static bool npc_check_overlap(struct rvu *rvu, int blkaddr, 188 enum key_fields type, u8 start_lid, u8 intf) 189 { 190 struct npc_mcam *mcam = &rvu->hw->mcam; 191 struct npc_key_field *dummy, *input; 192 int start_kwi, offset; 193 u8 nr_bits, lid, lt, ld; 194 u64 cfg; 195 196 dummy = &mcam->rx_key_fields[NPC_UNKNOWN]; 197 input = &mcam->rx_key_fields[type]; 198 199 if (is_npc_intf_tx(intf)) { 200 dummy = &mcam->tx_key_fields[NPC_UNKNOWN]; 201 input = &mcam->tx_key_fields[type]; 202 } 203 204 for (lid = start_lid; lid < NPC_MAX_LID; lid++) { 205 for (lt = 0; lt < NPC_MAX_LT; lt++) { 206 for (ld = 0; ld < NPC_MAX_LD; ld++) { 207 cfg = rvu_read64(rvu, blkaddr, 208 NPC_AF_INTFX_LIDX_LTX_LDX_CFG 209 (intf, lid, lt, ld)); 210 if (!FIELD_GET(NPC_LDATA_EN, cfg)) 211 continue; 212 memset(dummy, 0, sizeof(struct npc_key_field)); 213 npc_set_layer_mdata(mcam, NPC_UNKNOWN, cfg, 214 lid, lt, intf); 215 /* exclude input */ 216 if (npc_is_same(input, dummy)) 217 continue; 218 start_kwi = dummy->layer_mdata.key / 8; 219 offset = (dummy->layer_mdata.key * 8) % 64; 220 nr_bits = dummy->layer_mdata.len * 8; 221 /* form KW masks */ 222 npc_set_kw_masks(mcam, NPC_UNKNOWN, nr_bits, 223 start_kwi, offset, intf); 224 /* check any input field bits falls in any 225 * other field bits. 226 */ 227 if (npc_check_overlap_fields(dummy, input)) 228 return true; 229 } 230 } 231 } 232 233 return false; 234 } 235 236 static bool npc_check_field(struct rvu *rvu, int blkaddr, enum key_fields type, 237 u8 intf) 238 { 239 if (!npc_is_field_present(rvu, type, intf) || 240 npc_check_overlap(rvu, blkaddr, type, 0, intf)) 241 return false; 242 return true; 243 } 244 245 static void npc_scan_exact_result(struct npc_mcam *mcam, u8 bit_number, 246 u8 key_nibble, u8 intf) 247 { 248 u8 offset = (key_nibble * 4) % 64; /* offset within key word */ 249 u8 kwi = (key_nibble * 4) / 64; /* which word in key */ 250 u8 nr_bits = 4; /* bits in a nibble */ 251 u8 type; 252 253 switch (bit_number) { 254 case 40 ... 43: 255 type = NPC_EXACT_RESULT; 256 break; 257 258 default: 259 return; 260 } 261 npc_set_kw_masks(mcam, type, nr_bits, kwi, offset, intf); 262 } 263 264 static void npc_scan_parse_result(struct npc_mcam *mcam, u8 bit_number, 265 u8 key_nibble, u8 intf) 266 { 267 u8 offset = (key_nibble * 4) % 64; /* offset within key word */ 268 u8 kwi = (key_nibble * 4) / 64; /* which word in key */ 269 u8 nr_bits = 4; /* bits in a nibble */ 270 u8 type; 271 272 switch (bit_number) { 273 case 0 ... 2: 274 type = NPC_CHAN; 275 break; 276 case 3: 277 type = NPC_ERRLEV; 278 break; 279 case 4 ... 5: 280 type = NPC_ERRCODE; 281 break; 282 case 6: 283 type = NPC_LXMB; 284 break; 285 /* check for LTYPE only as of now */ 286 case 9: 287 type = NPC_LA; 288 break; 289 case 12: 290 type = NPC_LB; 291 break; 292 case 15: 293 type = NPC_LC; 294 break; 295 case 18: 296 type = NPC_LD; 297 break; 298 case 21: 299 type = NPC_LE; 300 break; 301 case 24: 302 type = NPC_LF; 303 break; 304 case 27: 305 type = NPC_LG; 306 break; 307 case 30: 308 type = NPC_LH; 309 break; 310 default: 311 return; 312 } 313 314 npc_set_kw_masks(mcam, type, nr_bits, kwi, offset, intf); 315 } 316 317 static void npc_handle_multi_layer_fields(struct rvu *rvu, int blkaddr, u8 intf) 318 { 319 struct npc_mcam *mcam = &rvu->hw->mcam; 320 struct npc_key_field *key_fields; 321 /* Ether type can come from three layers 322 * (ethernet, single tagged, double tagged) 323 */ 324 struct npc_key_field *etype_ether; 325 struct npc_key_field *etype_tag1; 326 struct npc_key_field *etype_tag2; 327 /* Outer VLAN TCI can come from two layers 328 * (single tagged, double tagged) 329 */ 330 struct npc_key_field *vlan_tag1; 331 struct npc_key_field *vlan_tag2; 332 /* Inner VLAN TCI for double tagged frames */ 333 struct npc_key_field *vlan_tag3; 334 u64 *features; 335 u8 start_lid; 336 int i; 337 338 key_fields = mcam->rx_key_fields; 339 features = &mcam->rx_features; 340 341 if (is_npc_intf_tx(intf)) { 342 key_fields = mcam->tx_key_fields; 343 features = &mcam->tx_features; 344 } 345 346 /* Handle header fields which can come from multiple layers like 347 * etype, outer vlan tci. These fields should have same position in 348 * the key otherwise to install a mcam rule more than one entry is 349 * needed which complicates mcam space management. 350 */ 351 etype_ether = &key_fields[NPC_ETYPE_ETHER]; 352 etype_tag1 = &key_fields[NPC_ETYPE_TAG1]; 353 etype_tag2 = &key_fields[NPC_ETYPE_TAG2]; 354 vlan_tag1 = &key_fields[NPC_VLAN_TAG1]; 355 vlan_tag2 = &key_fields[NPC_VLAN_TAG2]; 356 vlan_tag3 = &key_fields[NPC_VLAN_TAG3]; 357 358 /* if key profile programmed does not extract Ethertype at all */ 359 if (!etype_ether->nr_kws && !etype_tag1->nr_kws && !etype_tag2->nr_kws) { 360 dev_err(rvu->dev, "mkex: Ethertype is not extracted.\n"); 361 goto vlan_tci; 362 } 363 364 /* if key profile programmed extracts Ethertype from one layer */ 365 if (etype_ether->nr_kws && !etype_tag1->nr_kws && !etype_tag2->nr_kws) 366 key_fields[NPC_ETYPE] = *etype_ether; 367 if (!etype_ether->nr_kws && etype_tag1->nr_kws && !etype_tag2->nr_kws) 368 key_fields[NPC_ETYPE] = *etype_tag1; 369 if (!etype_ether->nr_kws && !etype_tag1->nr_kws && etype_tag2->nr_kws) 370 key_fields[NPC_ETYPE] = *etype_tag2; 371 372 /* if key profile programmed extracts Ethertype from multiple layers */ 373 if (etype_ether->nr_kws && etype_tag1->nr_kws) { 374 for (i = 0; i < NPC_MAX_KWS_IN_KEY; i++) { 375 if (etype_ether->kw_mask[i] != etype_tag1->kw_mask[i]) { 376 dev_err(rvu->dev, "mkex: Etype pos is different for untagged and tagged pkts.\n"); 377 goto vlan_tci; 378 } 379 } 380 key_fields[NPC_ETYPE] = *etype_tag1; 381 } 382 if (etype_ether->nr_kws && etype_tag2->nr_kws) { 383 for (i = 0; i < NPC_MAX_KWS_IN_KEY; i++) { 384 if (etype_ether->kw_mask[i] != etype_tag2->kw_mask[i]) { 385 dev_err(rvu->dev, "mkex: Etype pos is different for untagged and double tagged pkts.\n"); 386 goto vlan_tci; 387 } 388 } 389 key_fields[NPC_ETYPE] = *etype_tag2; 390 } 391 if (etype_tag1->nr_kws && etype_tag2->nr_kws) { 392 for (i = 0; i < NPC_MAX_KWS_IN_KEY; i++) { 393 if (etype_tag1->kw_mask[i] != etype_tag2->kw_mask[i]) { 394 dev_err(rvu->dev, "mkex: Etype pos is different for tagged and double tagged pkts.\n"); 395 goto vlan_tci; 396 } 397 } 398 key_fields[NPC_ETYPE] = *etype_tag2; 399 } 400 401 /* check none of higher layers overwrite Ethertype */ 402 start_lid = key_fields[NPC_ETYPE].layer_mdata.lid + 1; 403 if (npc_check_overlap(rvu, blkaddr, NPC_ETYPE, start_lid, intf)) { 404 dev_err(rvu->dev, "mkex: Ethertype is overwritten by higher layers.\n"); 405 goto vlan_tci; 406 } 407 *features |= BIT_ULL(NPC_ETYPE); 408 vlan_tci: 409 /* if key profile does not extract outer vlan tci at all */ 410 if (!vlan_tag1->nr_kws && !vlan_tag2->nr_kws) { 411 dev_err(rvu->dev, "mkex: Outer vlan tci is not extracted.\n"); 412 goto done; 413 } 414 415 /* if key profile extracts outer vlan tci from one layer */ 416 if (vlan_tag1->nr_kws && !vlan_tag2->nr_kws) 417 key_fields[NPC_OUTER_VID] = *vlan_tag1; 418 if (!vlan_tag1->nr_kws && vlan_tag2->nr_kws) 419 key_fields[NPC_OUTER_VID] = *vlan_tag2; 420 421 /* if key profile extracts outer vlan tci from multiple layers */ 422 if (vlan_tag1->nr_kws && vlan_tag2->nr_kws) { 423 for (i = 0; i < NPC_MAX_KWS_IN_KEY; i++) { 424 if (vlan_tag1->kw_mask[i] != vlan_tag2->kw_mask[i]) { 425 dev_err(rvu->dev, "mkex: Out vlan tci pos is different for tagged and double tagged pkts.\n"); 426 goto done; 427 } 428 } 429 key_fields[NPC_OUTER_VID] = *vlan_tag2; 430 } 431 /* check none of higher layers overwrite outer vlan tci */ 432 start_lid = key_fields[NPC_OUTER_VID].layer_mdata.lid + 1; 433 if (npc_check_overlap(rvu, blkaddr, NPC_OUTER_VID, start_lid, intf)) { 434 dev_err(rvu->dev, "mkex: Outer vlan tci is overwritten by higher layers.\n"); 435 goto done; 436 } 437 *features |= BIT_ULL(NPC_OUTER_VID); 438 439 /* If key profile extracts inner vlan tci */ 440 if (vlan_tag3->nr_kws) { 441 key_fields[NPC_INNER_VID] = *vlan_tag3; 442 *features |= BIT_ULL(NPC_INNER_VID); 443 } 444 done: 445 return; 446 } 447 448 static void npc_scan_ldata(struct rvu *rvu, int blkaddr, u8 lid, 449 u8 lt, u64 cfg, u8 intf) 450 { 451 struct npc_mcam_kex_hash *mkex_hash = rvu->kpu.mkex_hash; 452 struct npc_mcam *mcam = &rvu->hw->mcam; 453 u8 hdr, key, nr_bytes, bit_offset; 454 u8 la_ltype, la_start; 455 /* starting KW index and starting bit position */ 456 int start_kwi, offset; 457 458 nr_bytes = FIELD_GET(NPC_BYTESM, cfg) + 1; 459 hdr = FIELD_GET(NPC_HDR_OFFSET, cfg); 460 key = FIELD_GET(NPC_KEY_OFFSET, cfg); 461 462 /* For Tx, Layer A has NIX_INST_HDR_S(64 bytes) preceding 463 * ethernet header. 464 */ 465 if (is_npc_intf_tx(intf)) { 466 la_ltype = NPC_LT_LA_IH_NIX_ETHER; 467 la_start = 8; 468 } else { 469 la_ltype = NPC_LT_LA_ETHER; 470 la_start = 0; 471 } 472 473 #define NPC_SCAN_HDR(name, hlid, hlt, hstart, hlen) \ 474 do { \ 475 start_kwi = key / 8; \ 476 offset = (key * 8) % 64; \ 477 if (lid == (hlid) && lt == (hlt)) { \ 478 if ((hstart) >= hdr && \ 479 ((hstart) + (hlen)) <= (hdr + nr_bytes)) { \ 480 bit_offset = (hdr + nr_bytes - (hstart) - (hlen)) * 8; \ 481 npc_set_layer_mdata(mcam, (name), cfg, lid, lt, intf); \ 482 offset += bit_offset; \ 483 start_kwi += offset / 64; \ 484 offset %= 64; \ 485 npc_set_kw_masks(mcam, (name), (hlen) * 8, \ 486 start_kwi, offset, intf); \ 487 } \ 488 } \ 489 } while (0) 490 491 /* List LID, LTYPE, start offset from layer and length(in bytes) of 492 * packet header fields below. 493 * Example: Source IP is 4 bytes and starts at 12th byte of IP header 494 */ 495 NPC_SCAN_HDR(NPC_TOS, NPC_LID_LC, NPC_LT_LC_IP, 1, 1); 496 NPC_SCAN_HDR(NPC_IPFRAG_IPV4, NPC_LID_LC, NPC_LT_LC_IP, 6, 1); 497 NPC_SCAN_HDR(NPC_SIP_IPV4, NPC_LID_LC, NPC_LT_LC_IP, 12, 4); 498 NPC_SCAN_HDR(NPC_DIP_IPV4, NPC_LID_LC, NPC_LT_LC_IP, 16, 4); 499 NPC_SCAN_HDR(NPC_IPFRAG_IPV6, NPC_LID_LC, NPC_LT_LC_IP6_EXT, 6, 1); 500 if (rvu->hw->cap.npc_hash_extract) { 501 if (mkex_hash->lid_lt_ld_hash_en[intf][lid][lt][0]) 502 NPC_SCAN_HDR(NPC_SIP_IPV6, NPC_LID_LC, NPC_LT_LC_IP6, 8, 4); 503 else 504 NPC_SCAN_HDR(NPC_SIP_IPV6, NPC_LID_LC, NPC_LT_LC_IP6, 8, 16); 505 506 if (mkex_hash->lid_lt_ld_hash_en[intf][lid][lt][1]) 507 NPC_SCAN_HDR(NPC_DIP_IPV6, NPC_LID_LC, NPC_LT_LC_IP6, 24, 4); 508 else 509 NPC_SCAN_HDR(NPC_DIP_IPV6, NPC_LID_LC, NPC_LT_LC_IP6, 24, 16); 510 } else { 511 NPC_SCAN_HDR(NPC_SIP_IPV6, NPC_LID_LC, NPC_LT_LC_IP6, 8, 16); 512 NPC_SCAN_HDR(NPC_DIP_IPV6, NPC_LID_LC, NPC_LT_LC_IP6, 24, 16); 513 } 514 515 NPC_SCAN_HDR(NPC_SPORT_UDP, NPC_LID_LD, NPC_LT_LD_UDP, 0, 2); 516 NPC_SCAN_HDR(NPC_DPORT_UDP, NPC_LID_LD, NPC_LT_LD_UDP, 2, 2); 517 NPC_SCAN_HDR(NPC_SPORT_TCP, NPC_LID_LD, NPC_LT_LD_TCP, 0, 2); 518 NPC_SCAN_HDR(NPC_DPORT_TCP, NPC_LID_LD, NPC_LT_LD_TCP, 2, 2); 519 NPC_SCAN_HDR(NPC_SPORT_SCTP, NPC_LID_LD, NPC_LT_LD_SCTP, 0, 2); 520 NPC_SCAN_HDR(NPC_DPORT_SCTP, NPC_LID_LD, NPC_LT_LD_SCTP, 2, 2); 521 NPC_SCAN_HDR(NPC_ETYPE_ETHER, NPC_LID_LA, NPC_LT_LA_ETHER, 12, 2); 522 NPC_SCAN_HDR(NPC_ETYPE_TAG1, NPC_LID_LB, NPC_LT_LB_CTAG, 4, 2); 523 NPC_SCAN_HDR(NPC_ETYPE_TAG2, NPC_LID_LB, NPC_LT_LB_STAG_QINQ, 8, 2); 524 NPC_SCAN_HDR(NPC_VLAN_TAG1, NPC_LID_LB, NPC_LT_LB_CTAG, 2, 2); 525 NPC_SCAN_HDR(NPC_VLAN_TAG2, NPC_LID_LB, NPC_LT_LB_STAG_QINQ, 2, 2); 526 NPC_SCAN_HDR(NPC_VLAN_TAG3, NPC_LID_LB, NPC_LT_LB_STAG_QINQ, 6, 2); 527 NPC_SCAN_HDR(NPC_DMAC, NPC_LID_LA, la_ltype, la_start, 6); 528 529 NPC_SCAN_HDR(NPC_IPSEC_SPI, NPC_LID_LD, NPC_LT_LD_AH, 4, 4); 530 NPC_SCAN_HDR(NPC_IPSEC_SPI, NPC_LID_LE, NPC_LT_LE_ESP, 0, 4); 531 532 /* SMAC follows the DMAC(which is 6 bytes) */ 533 NPC_SCAN_HDR(NPC_SMAC, NPC_LID_LA, la_ltype, la_start + 6, 6); 534 /* PF_FUNC is 2 bytes at 0th byte of NPC_LT_LA_IH_NIX_ETHER */ 535 NPC_SCAN_HDR(NPC_PF_FUNC, NPC_LID_LA, NPC_LT_LA_IH_NIX_ETHER, 0, 2); 536 } 537 538 static void npc_set_features(struct rvu *rvu, int blkaddr, u8 intf) 539 { 540 struct npc_mcam *mcam = &rvu->hw->mcam; 541 u64 *features = &mcam->rx_features; 542 u64 tcp_udp_sctp; 543 int hdr; 544 545 if (is_npc_intf_tx(intf)) 546 features = &mcam->tx_features; 547 548 for (hdr = NPC_DMAC; hdr < NPC_HEADER_FIELDS_MAX; hdr++) { 549 if (npc_check_field(rvu, blkaddr, hdr, intf)) 550 *features |= BIT_ULL(hdr); 551 } 552 553 tcp_udp_sctp = BIT_ULL(NPC_SPORT_TCP) | BIT_ULL(NPC_SPORT_UDP) | 554 BIT_ULL(NPC_DPORT_TCP) | BIT_ULL(NPC_DPORT_UDP) | 555 BIT_ULL(NPC_SPORT_SCTP) | BIT_ULL(NPC_DPORT_SCTP); 556 557 /* for tcp/udp/sctp corresponding layer type should be in the key */ 558 if (*features & tcp_udp_sctp) { 559 if (!npc_check_field(rvu, blkaddr, NPC_LD, intf)) 560 *features &= ~tcp_udp_sctp; 561 else 562 *features |= BIT_ULL(NPC_IPPROTO_TCP) | 563 BIT_ULL(NPC_IPPROTO_UDP) | 564 BIT_ULL(NPC_IPPROTO_SCTP); 565 } 566 567 /* for AH/ICMP/ICMPv6/, check if corresponding layer type is present in the key */ 568 if (npc_check_field(rvu, blkaddr, NPC_LD, intf)) { 569 *features |= BIT_ULL(NPC_IPPROTO_AH); 570 *features |= BIT_ULL(NPC_IPPROTO_ICMP); 571 *features |= BIT_ULL(NPC_IPPROTO_ICMP6); 572 } 573 574 /* for ESP, check if corresponding layer type is present in the key */ 575 if (npc_check_field(rvu, blkaddr, NPC_LE, intf)) 576 *features |= BIT_ULL(NPC_IPPROTO_ESP); 577 578 /* for vlan corresponding layer type should be in the key */ 579 if (*features & BIT_ULL(NPC_OUTER_VID)) 580 if (!npc_check_field(rvu, blkaddr, NPC_LB, intf)) 581 *features &= ~BIT_ULL(NPC_OUTER_VID); 582 583 if (*features & (BIT_ULL(NPC_IPPROTO_AH) | BIT_ULL(NPC_IPPROTO_ESP))) 584 *features |= BIT_ULL(NPC_IPSEC_SPI); 585 586 /* for vlan ethertypes corresponding layer type should be in the key */ 587 if (npc_check_field(rvu, blkaddr, NPC_LB, intf)) 588 *features |= BIT_ULL(NPC_VLAN_ETYPE_CTAG) | 589 BIT_ULL(NPC_VLAN_ETYPE_STAG); 590 591 /* for L2M/L2B/L3M/L3B, check if the type is present in the key */ 592 if (npc_check_field(rvu, blkaddr, NPC_LXMB, intf)) 593 *features |= BIT_ULL(NPC_LXMB); 594 } 595 596 /* Scan key extraction profile and record how fields of our interest 597 * fill the key structure. Also verify Channel and DMAC exists in 598 * key and not overwritten by other header fields. 599 */ 600 static int npc_scan_kex(struct rvu *rvu, int blkaddr, u8 intf) 601 { 602 struct npc_mcam *mcam = &rvu->hw->mcam; 603 u8 lid, lt, ld, bitnr; 604 u64 cfg, masked_cfg; 605 u8 key_nibble = 0; 606 607 /* Scan and note how parse result is going to be in key. 608 * A bit set in PARSE_NIBBLE_ENA corresponds to a nibble from 609 * parse result in the key. The enabled nibbles from parse result 610 * will be concatenated in key. 611 */ 612 cfg = rvu_read64(rvu, blkaddr, NPC_AF_INTFX_KEX_CFG(intf)); 613 masked_cfg = cfg & NPC_PARSE_NIBBLE; 614 for_each_set_bit(bitnr, (unsigned long *)&masked_cfg, 31) { 615 npc_scan_parse_result(mcam, bitnr, key_nibble, intf); 616 key_nibble++; 617 } 618 619 /* Ignore exact match bits for mcam entries except the first rule 620 * which is drop on hit. This first rule is configured explitcitly by 621 * exact match code. 622 */ 623 masked_cfg = cfg & NPC_EXACT_NIBBLE; 624 bitnr = NPC_EXACT_NIBBLE_START; 625 for_each_set_bit_from(bitnr, (unsigned long *)&masked_cfg, NPC_EXACT_NIBBLE_END + 1) { 626 npc_scan_exact_result(mcam, bitnr, key_nibble, intf); 627 key_nibble++; 628 } 629 630 /* Scan and note how layer data is going to be in key */ 631 for (lid = 0; lid < NPC_MAX_LID; lid++) { 632 for (lt = 0; lt < NPC_MAX_LT; lt++) { 633 for (ld = 0; ld < NPC_MAX_LD; ld++) { 634 cfg = rvu_read64(rvu, blkaddr, 635 NPC_AF_INTFX_LIDX_LTX_LDX_CFG 636 (intf, lid, lt, ld)); 637 if (!FIELD_GET(NPC_LDATA_EN, cfg)) 638 continue; 639 npc_scan_ldata(rvu, blkaddr, lid, lt, cfg, 640 intf); 641 } 642 } 643 } 644 645 return 0; 646 } 647 648 static int npc_scan_verify_kex(struct rvu *rvu, int blkaddr) 649 { 650 int err; 651 652 err = npc_scan_kex(rvu, blkaddr, NIX_INTF_RX); 653 if (err) 654 return err; 655 656 err = npc_scan_kex(rvu, blkaddr, NIX_INTF_TX); 657 if (err) 658 return err; 659 660 /* Channel is mandatory */ 661 if (!npc_is_field_present(rvu, NPC_CHAN, NIX_INTF_RX)) { 662 dev_err(rvu->dev, "Channel not present in Key\n"); 663 return -EINVAL; 664 } 665 /* check that none of the fields overwrite channel */ 666 if (npc_check_overlap(rvu, blkaddr, NPC_CHAN, 0, NIX_INTF_RX)) { 667 dev_err(rvu->dev, "Channel cannot be overwritten\n"); 668 return -EINVAL; 669 } 670 671 npc_set_features(rvu, blkaddr, NIX_INTF_TX); 672 npc_set_features(rvu, blkaddr, NIX_INTF_RX); 673 npc_handle_multi_layer_fields(rvu, blkaddr, NIX_INTF_TX); 674 npc_handle_multi_layer_fields(rvu, blkaddr, NIX_INTF_RX); 675 676 return 0; 677 } 678 679 int npc_flow_steering_init(struct rvu *rvu, int blkaddr) 680 { 681 struct npc_mcam *mcam = &rvu->hw->mcam; 682 683 INIT_LIST_HEAD(&mcam->mcam_rules); 684 685 return npc_scan_verify_kex(rvu, blkaddr); 686 } 687 688 static int npc_check_unsupported_flows(struct rvu *rvu, u64 features, u8 intf) 689 { 690 struct npc_mcam *mcam = &rvu->hw->mcam; 691 u64 *mcam_features = &mcam->rx_features; 692 u64 unsupported; 693 u8 bit; 694 695 if (is_npc_intf_tx(intf)) 696 mcam_features = &mcam->tx_features; 697 698 unsupported = (*mcam_features ^ features) & ~(*mcam_features); 699 if (unsupported) { 700 dev_warn(rvu->dev, "Unsupported flow(s):\n"); 701 for_each_set_bit(bit, (unsigned long *)&unsupported, 64) 702 dev_warn(rvu->dev, "%s ", npc_get_field_name(bit)); 703 return -EOPNOTSUPP; 704 } 705 706 return 0; 707 } 708 709 /* npc_update_entry - Based on the masks generated during 710 * the key scanning, updates the given entry with value and 711 * masks for the field of interest. Maximum 16 bytes of a packet 712 * header can be extracted by HW hence lo and hi are sufficient. 713 * When field bytes are less than or equal to 8 then hi should be 714 * 0 for value and mask. 715 * 716 * If exact match of value is required then mask should be all 1's. 717 * If any bits in mask are 0 then corresponding bits in value are 718 * dont care. 719 */ 720 void npc_update_entry(struct rvu *rvu, enum key_fields type, 721 struct mcam_entry *entry, u64 val_lo, 722 u64 val_hi, u64 mask_lo, u64 mask_hi, u8 intf) 723 { 724 struct npc_mcam *mcam = &rvu->hw->mcam; 725 struct mcam_entry dummy = { {0} }; 726 struct npc_key_field *field; 727 u64 kw1, kw2, kw3; 728 u8 shift; 729 int i; 730 731 field = &mcam->rx_key_fields[type]; 732 if (is_npc_intf_tx(intf)) 733 field = &mcam->tx_key_fields[type]; 734 735 if (!field->nr_kws) 736 return; 737 738 for (i = 0; i < NPC_MAX_KWS_IN_KEY; i++) { 739 if (!field->kw_mask[i]) 740 continue; 741 /* place key value in kw[x] */ 742 shift = __ffs64(field->kw_mask[i]); 743 /* update entry value */ 744 kw1 = (val_lo << shift) & field->kw_mask[i]; 745 dummy.kw[i] = kw1; 746 /* update entry mask */ 747 kw1 = (mask_lo << shift) & field->kw_mask[i]; 748 dummy.kw_mask[i] = kw1; 749 750 if (field->nr_kws == 1) 751 break; 752 /* place remaining bits of key value in kw[x + 1] */ 753 if (field->nr_kws == 2) { 754 /* update entry value */ 755 kw2 = shift ? val_lo >> (64 - shift) : 0; 756 kw2 |= (val_hi << shift); 757 kw2 &= field->kw_mask[i + 1]; 758 dummy.kw[i + 1] = kw2; 759 /* update entry mask */ 760 kw2 = shift ? mask_lo >> (64 - shift) : 0; 761 kw2 |= (mask_hi << shift); 762 kw2 &= field->kw_mask[i + 1]; 763 dummy.kw_mask[i + 1] = kw2; 764 break; 765 } 766 /* place remaining bits of key value in kw[x + 1], kw[x + 2] */ 767 if (field->nr_kws == 3) { 768 /* update entry value */ 769 kw2 = shift ? val_lo >> (64 - shift) : 0; 770 kw2 |= (val_hi << shift); 771 kw2 &= field->kw_mask[i + 1]; 772 kw3 = shift ? val_hi >> (64 - shift) : 0; 773 kw3 &= field->kw_mask[i + 2]; 774 dummy.kw[i + 1] = kw2; 775 dummy.kw[i + 2] = kw3; 776 /* update entry mask */ 777 kw2 = shift ? mask_lo >> (64 - shift) : 0; 778 kw2 |= (mask_hi << shift); 779 kw2 &= field->kw_mask[i + 1]; 780 kw3 = shift ? mask_hi >> (64 - shift) : 0; 781 kw3 &= field->kw_mask[i + 2]; 782 dummy.kw_mask[i + 1] = kw2; 783 dummy.kw_mask[i + 2] = kw3; 784 break; 785 } 786 } 787 /* dummy is ready with values and masks for given key 788 * field now clear and update input entry with those 789 */ 790 for (i = 0; i < NPC_MAX_KWS_IN_KEY; i++) { 791 if (!field->kw_mask[i]) 792 continue; 793 entry->kw[i] &= ~field->kw_mask[i]; 794 entry->kw_mask[i] &= ~field->kw_mask[i]; 795 796 entry->kw[i] |= dummy.kw[i]; 797 entry->kw_mask[i] |= dummy.kw_mask[i]; 798 } 799 } 800 801 static void npc_update_ipv6_flow(struct rvu *rvu, struct mcam_entry *entry, 802 u64 features, struct flow_msg *pkt, 803 struct flow_msg *mask, 804 struct rvu_npc_mcam_rule *output, u8 intf) 805 { 806 u32 src_ip[IPV6_WORDS], src_ip_mask[IPV6_WORDS]; 807 u32 dst_ip[IPV6_WORDS], dst_ip_mask[IPV6_WORDS]; 808 struct flow_msg *opkt = &output->packet; 809 struct flow_msg *omask = &output->mask; 810 u64 mask_lo, mask_hi; 811 u64 val_lo, val_hi; 812 813 /* For an ipv6 address fe80::2c68:63ff:fe5e:2d0a the packet 814 * values to be programmed in MCAM should as below: 815 * val_high: 0xfe80000000000000 816 * val_low: 0x2c6863fffe5e2d0a 817 */ 818 if (features & BIT_ULL(NPC_SIP_IPV6)) { 819 be32_to_cpu_array(src_ip_mask, mask->ip6src, IPV6_WORDS); 820 be32_to_cpu_array(src_ip, pkt->ip6src, IPV6_WORDS); 821 822 mask_hi = (u64)src_ip_mask[0] << 32 | src_ip_mask[1]; 823 mask_lo = (u64)src_ip_mask[2] << 32 | src_ip_mask[3]; 824 val_hi = (u64)src_ip[0] << 32 | src_ip[1]; 825 val_lo = (u64)src_ip[2] << 32 | src_ip[3]; 826 827 npc_update_entry(rvu, NPC_SIP_IPV6, entry, val_lo, val_hi, 828 mask_lo, mask_hi, intf); 829 memcpy(opkt->ip6src, pkt->ip6src, sizeof(opkt->ip6src)); 830 memcpy(omask->ip6src, mask->ip6src, sizeof(omask->ip6src)); 831 } 832 if (features & BIT_ULL(NPC_DIP_IPV6)) { 833 be32_to_cpu_array(dst_ip_mask, mask->ip6dst, IPV6_WORDS); 834 be32_to_cpu_array(dst_ip, pkt->ip6dst, IPV6_WORDS); 835 836 mask_hi = (u64)dst_ip_mask[0] << 32 | dst_ip_mask[1]; 837 mask_lo = (u64)dst_ip_mask[2] << 32 | dst_ip_mask[3]; 838 val_hi = (u64)dst_ip[0] << 32 | dst_ip[1]; 839 val_lo = (u64)dst_ip[2] << 32 | dst_ip[3]; 840 841 npc_update_entry(rvu, NPC_DIP_IPV6, entry, val_lo, val_hi, 842 mask_lo, mask_hi, intf); 843 memcpy(opkt->ip6dst, pkt->ip6dst, sizeof(opkt->ip6dst)); 844 memcpy(omask->ip6dst, mask->ip6dst, sizeof(omask->ip6dst)); 845 } 846 } 847 848 static void npc_update_vlan_features(struct rvu *rvu, struct mcam_entry *entry, 849 u64 features, u8 intf) 850 { 851 bool ctag = !!(features & BIT_ULL(NPC_VLAN_ETYPE_CTAG)); 852 bool stag = !!(features & BIT_ULL(NPC_VLAN_ETYPE_STAG)); 853 bool vid = !!(features & BIT_ULL(NPC_OUTER_VID)); 854 855 /* If only VLAN id is given then always match outer VLAN id */ 856 if (vid && !ctag && !stag) { 857 npc_update_entry(rvu, NPC_LB, entry, 858 NPC_LT_LB_STAG_QINQ | NPC_LT_LB_CTAG, 0, 859 NPC_LT_LB_STAG_QINQ & NPC_LT_LB_CTAG, 0, intf); 860 return; 861 } 862 if (ctag) 863 npc_update_entry(rvu, NPC_LB, entry, NPC_LT_LB_CTAG, 0, 864 ~0ULL, 0, intf); 865 if (stag) 866 npc_update_entry(rvu, NPC_LB, entry, NPC_LT_LB_STAG_QINQ, 0, 867 ~0ULL, 0, intf); 868 } 869 870 static void npc_update_flow(struct rvu *rvu, struct mcam_entry *entry, 871 u64 features, struct flow_msg *pkt, 872 struct flow_msg *mask, 873 struct rvu_npc_mcam_rule *output, u8 intf, 874 int blkaddr) 875 { 876 u64 dmac_mask = ether_addr_to_u64(mask->dmac); 877 u64 smac_mask = ether_addr_to_u64(mask->smac); 878 u64 dmac_val = ether_addr_to_u64(pkt->dmac); 879 u64 smac_val = ether_addr_to_u64(pkt->smac); 880 struct flow_msg *opkt = &output->packet; 881 struct flow_msg *omask = &output->mask; 882 883 if (!features) 884 return; 885 886 /* For tcp/udp/sctp LTYPE should be present in entry */ 887 if (features & BIT_ULL(NPC_IPPROTO_TCP)) 888 npc_update_entry(rvu, NPC_LD, entry, NPC_LT_LD_TCP, 889 0, ~0ULL, 0, intf); 890 if (features & BIT_ULL(NPC_IPPROTO_UDP)) 891 npc_update_entry(rvu, NPC_LD, entry, NPC_LT_LD_UDP, 892 0, ~0ULL, 0, intf); 893 if (features & BIT_ULL(NPC_IPPROTO_SCTP)) 894 npc_update_entry(rvu, NPC_LD, entry, NPC_LT_LD_SCTP, 895 0, ~0ULL, 0, intf); 896 if (features & BIT_ULL(NPC_IPPROTO_ICMP)) 897 npc_update_entry(rvu, NPC_LD, entry, NPC_LT_LD_ICMP, 898 0, ~0ULL, 0, intf); 899 if (features & BIT_ULL(NPC_IPPROTO_ICMP6)) 900 npc_update_entry(rvu, NPC_LD, entry, NPC_LT_LD_ICMP6, 901 0, ~0ULL, 0, intf); 902 903 /* For AH, LTYPE should be present in entry */ 904 if (features & BIT_ULL(NPC_IPPROTO_AH)) 905 npc_update_entry(rvu, NPC_LD, entry, NPC_LT_LD_AH, 906 0, ~0ULL, 0, intf); 907 /* For ESP, LTYPE should be present in entry */ 908 if (features & BIT_ULL(NPC_IPPROTO_ESP)) 909 npc_update_entry(rvu, NPC_LE, entry, NPC_LT_LE_ESP, 910 0, ~0ULL, 0, intf); 911 912 if (features & BIT_ULL(NPC_LXMB)) { 913 output->lxmb = is_broadcast_ether_addr(pkt->dmac) ? 2 : 1; 914 npc_update_entry(rvu, NPC_LXMB, entry, output->lxmb, 0, 915 output->lxmb, 0, intf); 916 } 917 #define NPC_WRITE_FLOW(field, member, val_lo, val_hi, mask_lo, mask_hi) \ 918 do { \ 919 if (features & BIT_ULL((field))) { \ 920 npc_update_entry(rvu, (field), entry, (val_lo), (val_hi), \ 921 (mask_lo), (mask_hi), intf); \ 922 memcpy(&opkt->member, &pkt->member, sizeof(pkt->member)); \ 923 memcpy(&omask->member, &mask->member, sizeof(mask->member)); \ 924 } \ 925 } while (0) 926 927 NPC_WRITE_FLOW(NPC_DMAC, dmac, dmac_val, 0, dmac_mask, 0); 928 929 NPC_WRITE_FLOW(NPC_SMAC, smac, smac_val, 0, smac_mask, 0); 930 NPC_WRITE_FLOW(NPC_ETYPE, etype, ntohs(pkt->etype), 0, 931 ntohs(mask->etype), 0); 932 NPC_WRITE_FLOW(NPC_TOS, tos, pkt->tos, 0, mask->tos, 0); 933 NPC_WRITE_FLOW(NPC_IPFRAG_IPV4, ip_flag, pkt->ip_flag, 0, 934 mask->ip_flag, 0); 935 NPC_WRITE_FLOW(NPC_SIP_IPV4, ip4src, ntohl(pkt->ip4src), 0, 936 ntohl(mask->ip4src), 0); 937 NPC_WRITE_FLOW(NPC_DIP_IPV4, ip4dst, ntohl(pkt->ip4dst), 0, 938 ntohl(mask->ip4dst), 0); 939 NPC_WRITE_FLOW(NPC_SPORT_TCP, sport, ntohs(pkt->sport), 0, 940 ntohs(mask->sport), 0); 941 NPC_WRITE_FLOW(NPC_SPORT_UDP, sport, ntohs(pkt->sport), 0, 942 ntohs(mask->sport), 0); 943 NPC_WRITE_FLOW(NPC_DPORT_TCP, dport, ntohs(pkt->dport), 0, 944 ntohs(mask->dport), 0); 945 NPC_WRITE_FLOW(NPC_DPORT_UDP, dport, ntohs(pkt->dport), 0, 946 ntohs(mask->dport), 0); 947 NPC_WRITE_FLOW(NPC_SPORT_SCTP, sport, ntohs(pkt->sport), 0, 948 ntohs(mask->sport), 0); 949 NPC_WRITE_FLOW(NPC_DPORT_SCTP, dport, ntohs(pkt->dport), 0, 950 ntohs(mask->dport), 0); 951 952 NPC_WRITE_FLOW(NPC_IPSEC_SPI, spi, ntohl(pkt->spi), 0, 953 ntohl(mask->spi), 0); 954 955 NPC_WRITE_FLOW(NPC_OUTER_VID, vlan_tci, ntohs(pkt->vlan_tci), 0, 956 ntohs(mask->vlan_tci), 0); 957 NPC_WRITE_FLOW(NPC_INNER_VID, vlan_itci, ntohs(pkt->vlan_itci), 0, 958 ntohs(mask->vlan_itci), 0); 959 960 NPC_WRITE_FLOW(NPC_IPFRAG_IPV6, next_header, pkt->next_header, 0, 961 mask->next_header, 0); 962 npc_update_ipv6_flow(rvu, entry, features, pkt, mask, output, intf); 963 npc_update_vlan_features(rvu, entry, features, intf); 964 965 npc_update_field_hash(rvu, intf, entry, blkaddr, features, 966 pkt, mask, opkt, omask); 967 } 968 969 static struct rvu_npc_mcam_rule *rvu_mcam_find_rule(struct npc_mcam *mcam, u16 entry) 970 { 971 struct rvu_npc_mcam_rule *iter; 972 973 mutex_lock(&mcam->lock); 974 list_for_each_entry(iter, &mcam->mcam_rules, list) { 975 if (iter->entry == entry) { 976 mutex_unlock(&mcam->lock); 977 return iter; 978 } 979 } 980 mutex_unlock(&mcam->lock); 981 982 return NULL; 983 } 984 985 static void rvu_mcam_add_rule(struct npc_mcam *mcam, 986 struct rvu_npc_mcam_rule *rule) 987 { 988 struct list_head *head = &mcam->mcam_rules; 989 struct rvu_npc_mcam_rule *iter; 990 991 mutex_lock(&mcam->lock); 992 list_for_each_entry(iter, &mcam->mcam_rules, list) { 993 if (iter->entry > rule->entry) 994 break; 995 head = &iter->list; 996 } 997 998 list_add(&rule->list, head); 999 mutex_unlock(&mcam->lock); 1000 } 1001 1002 static void rvu_mcam_remove_counter_from_rule(struct rvu *rvu, u16 pcifunc, 1003 struct rvu_npc_mcam_rule *rule) 1004 { 1005 struct npc_mcam_oper_counter_req free_req = { 0 }; 1006 struct msg_rsp free_rsp; 1007 1008 if (!rule->has_cntr) 1009 return; 1010 1011 free_req.hdr.pcifunc = pcifunc; 1012 free_req.cntr = rule->cntr; 1013 1014 rvu_mbox_handler_npc_mcam_free_counter(rvu, &free_req, &free_rsp); 1015 rule->has_cntr = false; 1016 } 1017 1018 static void rvu_mcam_add_counter_to_rule(struct rvu *rvu, u16 pcifunc, 1019 struct rvu_npc_mcam_rule *rule, 1020 struct npc_install_flow_rsp *rsp) 1021 { 1022 struct npc_mcam_alloc_counter_req cntr_req = { 0 }; 1023 struct npc_mcam_alloc_counter_rsp cntr_rsp = { 0 }; 1024 int err; 1025 1026 cntr_req.hdr.pcifunc = pcifunc; 1027 cntr_req.contig = true; 1028 cntr_req.count = 1; 1029 1030 /* we try to allocate a counter to track the stats of this 1031 * rule. If counter could not be allocated then proceed 1032 * without counter because counters are limited than entries. 1033 */ 1034 err = rvu_mbox_handler_npc_mcam_alloc_counter(rvu, &cntr_req, 1035 &cntr_rsp); 1036 if (!err && cntr_rsp.count) { 1037 rule->cntr = cntr_rsp.cntr; 1038 rule->has_cntr = true; 1039 rsp->counter = rule->cntr; 1040 } else { 1041 rsp->counter = err; 1042 } 1043 } 1044 1045 static void npc_update_rx_entry(struct rvu *rvu, struct rvu_pfvf *pfvf, 1046 struct mcam_entry *entry, 1047 struct npc_install_flow_req *req, 1048 u16 target, bool pf_set_vfs_mac) 1049 { 1050 struct rvu_switch *rswitch = &rvu->rswitch; 1051 struct nix_rx_action action; 1052 1053 if (rswitch->mode == DEVLINK_ESWITCH_MODE_SWITCHDEV && pf_set_vfs_mac) 1054 req->chan_mask = 0x0; /* Do not care channel */ 1055 1056 npc_update_entry(rvu, NPC_CHAN, entry, req->channel, 0, req->chan_mask, 1057 0, NIX_INTF_RX); 1058 1059 *(u64 *)&action = 0x00; 1060 action.pf_func = target; 1061 action.op = req->op; 1062 action.index = req->index; 1063 action.match_id = req->match_id; 1064 action.flow_key_alg = req->flow_key_alg; 1065 1066 if (req->op == NIX_RX_ACTION_DEFAULT) { 1067 if (pfvf->def_ucast_rule) { 1068 action = pfvf->def_ucast_rule->rx_action; 1069 } else { 1070 /* For profiles which do not extract DMAC, the default 1071 * unicast entry is unused. Hence modify action for the 1072 * requests which use same action as default unicast 1073 * entry 1074 */ 1075 *(u64 *)&action = 0; 1076 action.pf_func = target; 1077 action.op = NIX_RX_ACTIONOP_UCAST; 1078 } 1079 } 1080 1081 entry->action = *(u64 *)&action; 1082 1083 /* VTAG0 starts at 0th byte of LID_B. 1084 * VTAG1 starts at 4th byte of LID_B. 1085 */ 1086 entry->vtag_action = FIELD_PREP(RX_VTAG0_VALID_BIT, req->vtag0_valid) | 1087 FIELD_PREP(RX_VTAG0_TYPE_MASK, req->vtag0_type) | 1088 FIELD_PREP(RX_VTAG0_LID_MASK, NPC_LID_LB) | 1089 FIELD_PREP(RX_VTAG0_RELPTR_MASK, 0) | 1090 FIELD_PREP(RX_VTAG1_VALID_BIT, req->vtag1_valid) | 1091 FIELD_PREP(RX_VTAG1_TYPE_MASK, req->vtag1_type) | 1092 FIELD_PREP(RX_VTAG1_LID_MASK, NPC_LID_LB) | 1093 FIELD_PREP(RX_VTAG1_RELPTR_MASK, 4); 1094 } 1095 1096 static void npc_update_tx_entry(struct rvu *rvu, struct rvu_pfvf *pfvf, 1097 struct mcam_entry *entry, 1098 struct npc_install_flow_req *req, u16 target) 1099 { 1100 struct nix_tx_action action; 1101 u64 mask = ~0ULL; 1102 1103 /* If AF is installing then do not care about 1104 * PF_FUNC in Send Descriptor 1105 */ 1106 if (is_pffunc_af(req->hdr.pcifunc)) 1107 mask = 0; 1108 1109 npc_update_entry(rvu, NPC_PF_FUNC, entry, (__force u16)htons(target), 1110 0, mask, 0, NIX_INTF_TX); 1111 1112 *(u64 *)&action = 0x00; 1113 action.op = req->op; 1114 action.index = req->index; 1115 action.match_id = req->match_id; 1116 1117 entry->action = *(u64 *)&action; 1118 1119 /* VTAG0 starts at 0th byte of LID_B. 1120 * VTAG1 starts at 4th byte of LID_B. 1121 */ 1122 entry->vtag_action = FIELD_PREP(TX_VTAG0_DEF_MASK, req->vtag0_def) | 1123 FIELD_PREP(TX_VTAG0_OP_MASK, req->vtag0_op) | 1124 FIELD_PREP(TX_VTAG0_LID_MASK, NPC_LID_LA) | 1125 FIELD_PREP(TX_VTAG0_RELPTR_MASK, 20) | 1126 FIELD_PREP(TX_VTAG1_DEF_MASK, req->vtag1_def) | 1127 FIELD_PREP(TX_VTAG1_OP_MASK, req->vtag1_op) | 1128 FIELD_PREP(TX_VTAG1_LID_MASK, NPC_LID_LA) | 1129 FIELD_PREP(TX_VTAG1_RELPTR_MASK, 24); 1130 } 1131 1132 static int npc_install_flow(struct rvu *rvu, int blkaddr, u16 target, 1133 int nixlf, struct rvu_pfvf *pfvf, 1134 struct npc_install_flow_req *req, 1135 struct npc_install_flow_rsp *rsp, bool enable, 1136 bool pf_set_vfs_mac) 1137 { 1138 struct rvu_npc_mcam_rule *def_ucast_rule = pfvf->def_ucast_rule; 1139 u64 features, installed_features, missing_features = 0; 1140 struct npc_mcam_write_entry_req write_req = { 0 }; 1141 struct npc_mcam *mcam = &rvu->hw->mcam; 1142 struct rvu_npc_mcam_rule dummy = { 0 }; 1143 struct rvu_npc_mcam_rule *rule; 1144 u16 owner = req->hdr.pcifunc; 1145 struct msg_rsp write_rsp; 1146 struct mcam_entry *entry; 1147 bool new = false; 1148 u16 entry_index; 1149 int err; 1150 1151 installed_features = req->features; 1152 features = req->features; 1153 entry = &write_req.entry_data; 1154 entry_index = req->entry; 1155 1156 npc_update_flow(rvu, entry, features, &req->packet, &req->mask, &dummy, 1157 req->intf, blkaddr); 1158 1159 if (is_npc_intf_rx(req->intf)) 1160 npc_update_rx_entry(rvu, pfvf, entry, req, target, pf_set_vfs_mac); 1161 else 1162 npc_update_tx_entry(rvu, pfvf, entry, req, target); 1163 1164 /* Default unicast rules do not exist for TX */ 1165 if (is_npc_intf_tx(req->intf)) 1166 goto find_rule; 1167 1168 if (req->default_rule) { 1169 entry_index = npc_get_nixlf_mcam_index(mcam, target, nixlf, 1170 NIXLF_UCAST_ENTRY); 1171 enable = is_mcam_entry_enabled(rvu, mcam, blkaddr, entry_index); 1172 } 1173 1174 /* update mcam entry with default unicast rule attributes */ 1175 if (def_ucast_rule && (req->default_rule && req->append)) { 1176 missing_features = (def_ucast_rule->features ^ features) & 1177 def_ucast_rule->features; 1178 if (missing_features) 1179 npc_update_flow(rvu, entry, missing_features, 1180 &def_ucast_rule->packet, 1181 &def_ucast_rule->mask, 1182 &dummy, req->intf, 1183 blkaddr); 1184 installed_features = req->features | missing_features; 1185 } 1186 1187 find_rule: 1188 rule = rvu_mcam_find_rule(mcam, entry_index); 1189 if (!rule) { 1190 rule = kzalloc(sizeof(*rule), GFP_KERNEL); 1191 if (!rule) 1192 return -ENOMEM; 1193 new = true; 1194 } 1195 1196 /* allocate new counter if rule has no counter */ 1197 if (!req->default_rule && req->set_cntr && !rule->has_cntr) 1198 rvu_mcam_add_counter_to_rule(rvu, owner, rule, rsp); 1199 1200 /* if user wants to delete an existing counter for a rule then 1201 * free the counter 1202 */ 1203 if (!req->set_cntr && rule->has_cntr) 1204 rvu_mcam_remove_counter_from_rule(rvu, owner, rule); 1205 1206 write_req.hdr.pcifunc = owner; 1207 1208 /* AF owns the default rules so change the owner just to relax 1209 * the checks in rvu_mbox_handler_npc_mcam_write_entry 1210 */ 1211 if (req->default_rule) 1212 write_req.hdr.pcifunc = 0; 1213 1214 write_req.entry = entry_index; 1215 write_req.intf = req->intf; 1216 write_req.enable_entry = (u8)enable; 1217 /* if counter is available then clear and use it */ 1218 if (req->set_cntr && rule->has_cntr) { 1219 rvu_write64(rvu, blkaddr, NPC_AF_MATCH_STATX(rule->cntr), req->cntr_val); 1220 write_req.set_cntr = 1; 1221 write_req.cntr = rule->cntr; 1222 } 1223 1224 /* update rule */ 1225 memcpy(&rule->packet, &dummy.packet, sizeof(rule->packet)); 1226 memcpy(&rule->mask, &dummy.mask, sizeof(rule->mask)); 1227 rule->entry = entry_index; 1228 memcpy(&rule->rx_action, &entry->action, sizeof(struct nix_rx_action)); 1229 if (is_npc_intf_tx(req->intf)) 1230 memcpy(&rule->tx_action, &entry->action, 1231 sizeof(struct nix_tx_action)); 1232 rule->vtag_action = entry->vtag_action; 1233 rule->features = installed_features; 1234 rule->default_rule = req->default_rule; 1235 rule->owner = owner; 1236 rule->enable = enable; 1237 rule->chan_mask = write_req.entry_data.kw_mask[0] & NPC_KEX_CHAN_MASK; 1238 rule->chan = write_req.entry_data.kw[0] & NPC_KEX_CHAN_MASK; 1239 rule->chan &= rule->chan_mask; 1240 rule->lxmb = dummy.lxmb; 1241 if (is_npc_intf_tx(req->intf)) 1242 rule->intf = pfvf->nix_tx_intf; 1243 else 1244 rule->intf = pfvf->nix_rx_intf; 1245 1246 if (new) 1247 rvu_mcam_add_rule(mcam, rule); 1248 if (req->default_rule) 1249 pfvf->def_ucast_rule = rule; 1250 1251 /* write to mcam entry registers */ 1252 err = rvu_mbox_handler_npc_mcam_write_entry(rvu, &write_req, 1253 &write_rsp); 1254 if (err) { 1255 rvu_mcam_remove_counter_from_rule(rvu, owner, rule); 1256 if (new) { 1257 list_del(&rule->list); 1258 kfree(rule); 1259 } 1260 return err; 1261 } 1262 1263 /* VF's MAC address is being changed via PF */ 1264 if (pf_set_vfs_mac) { 1265 ether_addr_copy(pfvf->default_mac, req->packet.dmac); 1266 ether_addr_copy(pfvf->mac_addr, req->packet.dmac); 1267 set_bit(PF_SET_VF_MAC, &pfvf->flags); 1268 } 1269 1270 if (test_bit(PF_SET_VF_CFG, &pfvf->flags) && 1271 req->vtag0_type == NIX_AF_LFX_RX_VTAG_TYPE7) 1272 rule->vfvlan_cfg = true; 1273 1274 if (is_npc_intf_rx(req->intf) && req->match_id && 1275 (req->op == NIX_RX_ACTIONOP_UCAST || req->op == NIX_RX_ACTIONOP_RSS)) 1276 return rvu_nix_setup_ratelimit_aggr(rvu, req->hdr.pcifunc, 1277 req->index, req->match_id); 1278 1279 return 0; 1280 } 1281 1282 int rvu_mbox_handler_npc_install_flow(struct rvu *rvu, 1283 struct npc_install_flow_req *req, 1284 struct npc_install_flow_rsp *rsp) 1285 { 1286 bool from_vf = !!(req->hdr.pcifunc & RVU_PFVF_FUNC_MASK); 1287 struct rvu_switch *rswitch = &rvu->rswitch; 1288 int blkaddr, nixlf, err; 1289 struct rvu_pfvf *pfvf; 1290 bool pf_set_vfs_mac = false; 1291 bool enable = true; 1292 u16 target; 1293 1294 blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0); 1295 if (blkaddr < 0) { 1296 dev_err(rvu->dev, "%s: NPC block not implemented\n", __func__); 1297 return NPC_MCAM_INVALID_REQ; 1298 } 1299 1300 if (!is_npc_interface_valid(rvu, req->intf)) 1301 return NPC_FLOW_INTF_INVALID; 1302 1303 /* If DMAC is not extracted in MKEX, rules installed by AF 1304 * can rely on L2MB bit set by hardware protocol checker for 1305 * broadcast and multicast addresses. 1306 */ 1307 if (npc_check_field(rvu, blkaddr, NPC_DMAC, req->intf)) 1308 goto process_flow; 1309 1310 if (is_pffunc_af(req->hdr.pcifunc) && 1311 req->features & BIT_ULL(NPC_DMAC)) { 1312 if (is_unicast_ether_addr(req->packet.dmac)) { 1313 dev_warn(rvu->dev, 1314 "%s: mkex profile does not support ucast flow\n", 1315 __func__); 1316 return NPC_FLOW_NOT_SUPPORTED; 1317 } 1318 1319 if (!npc_is_field_present(rvu, NPC_LXMB, req->intf)) { 1320 dev_warn(rvu->dev, 1321 "%s: mkex profile does not support bcast/mcast flow", 1322 __func__); 1323 return NPC_FLOW_NOT_SUPPORTED; 1324 } 1325 1326 /* Modify feature to use LXMB instead of DMAC */ 1327 req->features &= ~BIT_ULL(NPC_DMAC); 1328 req->features |= BIT_ULL(NPC_LXMB); 1329 } 1330 1331 process_flow: 1332 if (from_vf && req->default_rule) 1333 return NPC_FLOW_VF_PERM_DENIED; 1334 1335 /* Each PF/VF info is maintained in struct rvu_pfvf. 1336 * rvu_pfvf for the target PF/VF needs to be retrieved 1337 * hence modify pcifunc accordingly. 1338 */ 1339 1340 /* AF installing for a PF/VF */ 1341 if (!req->hdr.pcifunc) 1342 target = req->vf; 1343 /* PF installing for its VF */ 1344 else if (!from_vf && req->vf) { 1345 target = (req->hdr.pcifunc & ~RVU_PFVF_FUNC_MASK) | req->vf; 1346 pf_set_vfs_mac = req->default_rule && 1347 (req->features & BIT_ULL(NPC_DMAC)); 1348 } 1349 /* msg received from PF/VF */ 1350 else 1351 target = req->hdr.pcifunc; 1352 1353 /* ignore chan_mask in case pf func is not AF, revisit later */ 1354 if (!is_pffunc_af(req->hdr.pcifunc)) 1355 req->chan_mask = 0xFFF; 1356 1357 err = npc_check_unsupported_flows(rvu, req->features, req->intf); 1358 if (err) 1359 return NPC_FLOW_NOT_SUPPORTED; 1360 1361 pfvf = rvu_get_pfvf(rvu, target); 1362 1363 /* PF installing for its VF */ 1364 if (req->hdr.pcifunc && !from_vf && req->vf) 1365 set_bit(PF_SET_VF_CFG, &pfvf->flags); 1366 1367 /* update req destination mac addr */ 1368 if ((req->features & BIT_ULL(NPC_DMAC)) && is_npc_intf_rx(req->intf) && 1369 is_zero_ether_addr(req->packet.dmac)) { 1370 ether_addr_copy(req->packet.dmac, pfvf->mac_addr); 1371 eth_broadcast_addr((u8 *)&req->mask.dmac); 1372 } 1373 1374 /* Proceed if NIXLF is attached or not for TX rules */ 1375 err = nix_get_nixlf(rvu, target, &nixlf, NULL); 1376 if (err && is_npc_intf_rx(req->intf) && !pf_set_vfs_mac) 1377 return NPC_FLOW_NO_NIXLF; 1378 1379 /* don't enable rule when nixlf not attached or initialized */ 1380 if (!(is_nixlf_attached(rvu, target) && 1381 test_bit(NIXLF_INITIALIZED, &pfvf->flags))) 1382 enable = false; 1383 1384 /* Packets reaching NPC in Tx path implies that a 1385 * NIXLF is properly setup and transmitting. 1386 * Hence rules can be enabled for Tx. 1387 */ 1388 if (is_npc_intf_tx(req->intf)) 1389 enable = true; 1390 1391 /* Do not allow requests from uninitialized VFs */ 1392 if (from_vf && !enable) 1393 return NPC_FLOW_VF_NOT_INIT; 1394 1395 /* PF sets VF mac & VF NIXLF is not attached, update the mac addr */ 1396 if (pf_set_vfs_mac && !enable) { 1397 ether_addr_copy(pfvf->default_mac, req->packet.dmac); 1398 ether_addr_copy(pfvf->mac_addr, req->packet.dmac); 1399 set_bit(PF_SET_VF_MAC, &pfvf->flags); 1400 return 0; 1401 } 1402 1403 mutex_lock(&rswitch->switch_lock); 1404 err = npc_install_flow(rvu, blkaddr, target, nixlf, pfvf, 1405 req, rsp, enable, pf_set_vfs_mac); 1406 mutex_unlock(&rswitch->switch_lock); 1407 1408 return err; 1409 } 1410 1411 static int npc_delete_flow(struct rvu *rvu, struct rvu_npc_mcam_rule *rule, 1412 u16 pcifunc) 1413 { 1414 struct npc_mcam_ena_dis_entry_req dis_req = { 0 }; 1415 struct msg_rsp dis_rsp; 1416 1417 if (rule->default_rule) 1418 return 0; 1419 1420 if (rule->has_cntr) 1421 rvu_mcam_remove_counter_from_rule(rvu, pcifunc, rule); 1422 1423 dis_req.hdr.pcifunc = pcifunc; 1424 dis_req.entry = rule->entry; 1425 1426 list_del(&rule->list); 1427 kfree(rule); 1428 1429 return rvu_mbox_handler_npc_mcam_dis_entry(rvu, &dis_req, &dis_rsp); 1430 } 1431 1432 int rvu_mbox_handler_npc_delete_flow(struct rvu *rvu, 1433 struct npc_delete_flow_req *req, 1434 struct npc_delete_flow_rsp *rsp) 1435 { 1436 struct npc_mcam *mcam = &rvu->hw->mcam; 1437 struct rvu_npc_mcam_rule *iter, *tmp; 1438 u16 pcifunc = req->hdr.pcifunc; 1439 struct list_head del_list; 1440 int blkaddr; 1441 1442 INIT_LIST_HEAD(&del_list); 1443 1444 mutex_lock(&mcam->lock); 1445 list_for_each_entry_safe(iter, tmp, &mcam->mcam_rules, list) { 1446 if (iter->owner == pcifunc) { 1447 /* All rules */ 1448 if (req->all) { 1449 list_move_tail(&iter->list, &del_list); 1450 /* Range of rules */ 1451 } else if (req->end && iter->entry >= req->start && 1452 iter->entry <= req->end) { 1453 list_move_tail(&iter->list, &del_list); 1454 /* single rule */ 1455 } else if (req->entry == iter->entry) { 1456 blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0); 1457 if (blkaddr) 1458 rsp->cntr_val = rvu_read64(rvu, blkaddr, 1459 NPC_AF_MATCH_STATX(iter->cntr)); 1460 list_move_tail(&iter->list, &del_list); 1461 break; 1462 } 1463 } 1464 } 1465 mutex_unlock(&mcam->lock); 1466 1467 list_for_each_entry_safe(iter, tmp, &del_list, list) { 1468 u16 entry = iter->entry; 1469 1470 /* clear the mcam entry target pcifunc */ 1471 mcam->entry2target_pffunc[entry] = 0x0; 1472 if (npc_delete_flow(rvu, iter, pcifunc)) 1473 dev_err(rvu->dev, "rule deletion failed for entry:%u", 1474 entry); 1475 } 1476 1477 return 0; 1478 } 1479 1480 static int npc_update_dmac_value(struct rvu *rvu, int npcblkaddr, 1481 struct rvu_npc_mcam_rule *rule, 1482 struct rvu_pfvf *pfvf) 1483 { 1484 struct npc_mcam_write_entry_req write_req = { 0 }; 1485 struct mcam_entry *entry = &write_req.entry_data; 1486 struct npc_mcam *mcam = &rvu->hw->mcam; 1487 struct msg_rsp rsp; 1488 u8 intf, enable; 1489 int err; 1490 1491 ether_addr_copy(rule->packet.dmac, pfvf->mac_addr); 1492 1493 npc_read_mcam_entry(rvu, mcam, npcblkaddr, rule->entry, 1494 entry, &intf, &enable); 1495 1496 npc_update_entry(rvu, NPC_DMAC, entry, 1497 ether_addr_to_u64(pfvf->mac_addr), 0, 1498 0xffffffffffffull, 0, intf); 1499 1500 write_req.hdr.pcifunc = rule->owner; 1501 write_req.entry = rule->entry; 1502 write_req.intf = pfvf->nix_rx_intf; 1503 1504 mutex_unlock(&mcam->lock); 1505 err = rvu_mbox_handler_npc_mcam_write_entry(rvu, &write_req, &rsp); 1506 mutex_lock(&mcam->lock); 1507 1508 return err; 1509 } 1510 1511 void npc_mcam_enable_flows(struct rvu *rvu, u16 target) 1512 { 1513 struct rvu_pfvf *pfvf = rvu_get_pfvf(rvu, target); 1514 struct rvu_npc_mcam_rule *def_ucast_rule; 1515 struct npc_mcam *mcam = &rvu->hw->mcam; 1516 struct rvu_npc_mcam_rule *rule; 1517 int blkaddr, bank, index; 1518 u64 def_action; 1519 1520 blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0); 1521 if (blkaddr < 0) 1522 return; 1523 1524 def_ucast_rule = pfvf->def_ucast_rule; 1525 1526 mutex_lock(&mcam->lock); 1527 list_for_each_entry(rule, &mcam->mcam_rules, list) { 1528 if (is_npc_intf_rx(rule->intf) && 1529 rule->rx_action.pf_func == target && !rule->enable) { 1530 if (rule->default_rule) { 1531 npc_enable_mcam_entry(rvu, mcam, blkaddr, 1532 rule->entry, true); 1533 rule->enable = true; 1534 continue; 1535 } 1536 1537 if (rule->vfvlan_cfg) 1538 npc_update_dmac_value(rvu, blkaddr, rule, pfvf); 1539 1540 if (rule->rx_action.op == NIX_RX_ACTION_DEFAULT) { 1541 if (!def_ucast_rule) 1542 continue; 1543 /* Use default unicast entry action */ 1544 rule->rx_action = def_ucast_rule->rx_action; 1545 def_action = *(u64 *)&def_ucast_rule->rx_action; 1546 bank = npc_get_bank(mcam, rule->entry); 1547 rvu_write64(rvu, blkaddr, 1548 NPC_AF_MCAMEX_BANKX_ACTION 1549 (rule->entry, bank), def_action); 1550 } 1551 1552 npc_enable_mcam_entry(rvu, mcam, blkaddr, 1553 rule->entry, true); 1554 rule->enable = true; 1555 } 1556 } 1557 1558 /* Enable MCAM entries installed by PF with target as VF pcifunc */ 1559 for (index = 0; index < mcam->bmap_entries; index++) { 1560 if (mcam->entry2target_pffunc[index] == target) 1561 npc_enable_mcam_entry(rvu, mcam, blkaddr, 1562 index, true); 1563 } 1564 mutex_unlock(&mcam->lock); 1565 } 1566 1567 void npc_mcam_disable_flows(struct rvu *rvu, u16 target) 1568 { 1569 struct npc_mcam *mcam = &rvu->hw->mcam; 1570 int blkaddr, index; 1571 1572 blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0); 1573 if (blkaddr < 0) 1574 return; 1575 1576 mutex_lock(&mcam->lock); 1577 /* Disable MCAM entries installed by PF with target as VF pcifunc */ 1578 for (index = 0; index < mcam->bmap_entries; index++) { 1579 if (mcam->entry2target_pffunc[index] == target) 1580 npc_enable_mcam_entry(rvu, mcam, blkaddr, 1581 index, false); 1582 } 1583 mutex_unlock(&mcam->lock); 1584 } 1585 1586 /* single drop on non hit rule starting from 0th index. This an extension 1587 * to RPM mac filter to support more rules. 1588 */ 1589 int npc_install_mcam_drop_rule(struct rvu *rvu, int mcam_idx, u16 *counter_idx, 1590 u64 chan_val, u64 chan_mask, u64 exact_val, u64 exact_mask, 1591 u64 bcast_mcast_val, u64 bcast_mcast_mask) 1592 { 1593 struct npc_mcam_alloc_counter_req cntr_req = { 0 }; 1594 struct npc_mcam_alloc_counter_rsp cntr_rsp = { 0 }; 1595 struct npc_mcam_write_entry_req req = { 0 }; 1596 struct npc_mcam *mcam = &rvu->hw->mcam; 1597 struct rvu_npc_mcam_rule *rule; 1598 struct msg_rsp rsp; 1599 bool enabled; 1600 int blkaddr; 1601 int err; 1602 1603 blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0); 1604 if (blkaddr < 0) { 1605 dev_err(rvu->dev, "%s: NPC block not implemented\n", __func__); 1606 return -ENODEV; 1607 } 1608 1609 /* Bail out if no exact match support */ 1610 if (!rvu_npc_exact_has_match_table(rvu)) { 1611 dev_info(rvu->dev, "%s: No support for exact match feature\n", __func__); 1612 return -EINVAL; 1613 } 1614 1615 /* If 0th entry is already used, return err */ 1616 enabled = is_mcam_entry_enabled(rvu, mcam, blkaddr, mcam_idx); 1617 if (enabled) { 1618 dev_err(rvu->dev, "%s: failed to add single drop on non hit rule at %d th index\n", 1619 __func__, mcam_idx); 1620 return -EINVAL; 1621 } 1622 1623 /* Add this entry to mcam rules list */ 1624 rule = kzalloc(sizeof(*rule), GFP_KERNEL); 1625 if (!rule) 1626 return -ENOMEM; 1627 1628 /* Disable rule by default. Enable rule when first dmac filter is 1629 * installed 1630 */ 1631 rule->enable = false; 1632 rule->chan = chan_val; 1633 rule->chan_mask = chan_mask; 1634 rule->entry = mcam_idx; 1635 rvu_mcam_add_rule(mcam, rule); 1636 1637 /* Reserve slot 0 */ 1638 npc_mcam_rsrcs_reserve(rvu, blkaddr, mcam_idx); 1639 1640 /* Allocate counter for this single drop on non hit rule */ 1641 cntr_req.hdr.pcifunc = 0; /* AF request */ 1642 cntr_req.contig = true; 1643 cntr_req.count = 1; 1644 err = rvu_mbox_handler_npc_mcam_alloc_counter(rvu, &cntr_req, &cntr_rsp); 1645 if (err) { 1646 dev_err(rvu->dev, "%s: Err to allocate cntr for drop rule (err=%d)\n", 1647 __func__, err); 1648 return -EFAULT; 1649 } 1650 *counter_idx = cntr_rsp.cntr; 1651 1652 /* Fill in fields for this mcam entry */ 1653 npc_update_entry(rvu, NPC_EXACT_RESULT, &req.entry_data, exact_val, 0, 1654 exact_mask, 0, NIX_INTF_RX); 1655 npc_update_entry(rvu, NPC_CHAN, &req.entry_data, chan_val, 0, 1656 chan_mask, 0, NIX_INTF_RX); 1657 npc_update_entry(rvu, NPC_LXMB, &req.entry_data, bcast_mcast_val, 0, 1658 bcast_mcast_mask, 0, NIX_INTF_RX); 1659 1660 req.intf = NIX_INTF_RX; 1661 req.set_cntr = true; 1662 req.cntr = cntr_rsp.cntr; 1663 req.entry = mcam_idx; 1664 1665 err = rvu_mbox_handler_npc_mcam_write_entry(rvu, &req, &rsp); 1666 if (err) { 1667 dev_err(rvu->dev, "%s: Installation of single drop on non hit rule at %d failed\n", 1668 __func__, mcam_idx); 1669 return err; 1670 } 1671 1672 dev_err(rvu->dev, "%s: Installed single drop on non hit rule at %d, cntr=%d\n", 1673 __func__, mcam_idx, req.cntr); 1674 1675 /* disable entry at Bank 0, index 0 */ 1676 npc_enable_mcam_entry(rvu, mcam, blkaddr, mcam_idx, false); 1677 1678 return 0; 1679 } 1680 1681 int rvu_mbox_handler_npc_get_field_status(struct rvu *rvu, 1682 struct npc_get_field_status_req *req, 1683 struct npc_get_field_status_rsp *rsp) 1684 { 1685 int blkaddr; 1686 1687 blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0); 1688 if (blkaddr < 0) 1689 return NPC_MCAM_INVALID_REQ; 1690 1691 if (!is_npc_interface_valid(rvu, req->intf)) 1692 return NPC_FLOW_INTF_INVALID; 1693 1694 if (npc_check_field(rvu, blkaddr, req->field, req->intf)) 1695 rsp->enable = 1; 1696 1697 return 0; 1698 } 1699