1 // SPDX-License-Identifier: GPL-2.0-or-later 2 #include <net/dsa.h> 3 4 #include "chip.h" 5 #include "devlink.h" 6 #include "global1.h" 7 #include "global2.h" 8 #include "port.h" 9 10 static int mv88e6xxx_atu_get_hash(struct mv88e6xxx_chip *chip, u8 *hash) 11 { 12 if (chip->info->ops->atu_get_hash) 13 return chip->info->ops->atu_get_hash(chip, hash); 14 15 return -EOPNOTSUPP; 16 } 17 18 static int mv88e6xxx_atu_set_hash(struct mv88e6xxx_chip *chip, u8 hash) 19 { 20 if (chip->info->ops->atu_set_hash) 21 return chip->info->ops->atu_set_hash(chip, hash); 22 23 return -EOPNOTSUPP; 24 } 25 26 enum mv88e6xxx_devlink_param_id { 27 MV88E6XXX_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 28 MV88E6XXX_DEVLINK_PARAM_ID_ATU_HASH, 29 }; 30 31 int mv88e6xxx_devlink_param_get(struct dsa_switch *ds, u32 id, 32 struct devlink_param_gset_ctx *ctx) 33 { 34 struct mv88e6xxx_chip *chip = ds->priv; 35 int err; 36 37 mv88e6xxx_reg_lock(chip); 38 39 switch (id) { 40 case MV88E6XXX_DEVLINK_PARAM_ID_ATU_HASH: 41 err = mv88e6xxx_atu_get_hash(chip, &ctx->val.vu8); 42 break; 43 default: 44 err = -EOPNOTSUPP; 45 break; 46 } 47 48 mv88e6xxx_reg_unlock(chip); 49 50 return err; 51 } 52 53 int mv88e6xxx_devlink_param_set(struct dsa_switch *ds, u32 id, 54 struct devlink_param_gset_ctx *ctx) 55 { 56 struct mv88e6xxx_chip *chip = ds->priv; 57 int err; 58 59 mv88e6xxx_reg_lock(chip); 60 61 switch (id) { 62 case MV88E6XXX_DEVLINK_PARAM_ID_ATU_HASH: 63 err = mv88e6xxx_atu_set_hash(chip, ctx->val.vu8); 64 break; 65 default: 66 err = -EOPNOTSUPP; 67 break; 68 } 69 70 mv88e6xxx_reg_unlock(chip); 71 72 return err; 73 } 74 75 static const struct devlink_param mv88e6xxx_devlink_params[] = { 76 DSA_DEVLINK_PARAM_DRIVER(MV88E6XXX_DEVLINK_PARAM_ID_ATU_HASH, 77 "ATU_hash", DEVLINK_PARAM_TYPE_U8, 78 BIT(DEVLINK_PARAM_CMODE_RUNTIME)), 79 }; 80 81 int mv88e6xxx_setup_devlink_params(struct dsa_switch *ds) 82 { 83 return dsa_devlink_params_register(ds, mv88e6xxx_devlink_params, 84 ARRAY_SIZE(mv88e6xxx_devlink_params)); 85 } 86 87 void mv88e6xxx_teardown_devlink_params(struct dsa_switch *ds) 88 { 89 dsa_devlink_params_unregister(ds, mv88e6xxx_devlink_params, 90 ARRAY_SIZE(mv88e6xxx_devlink_params)); 91 } 92 93 enum mv88e6xxx_devlink_resource_id { 94 MV88E6XXX_RESOURCE_ID_ATU, 95 MV88E6XXX_RESOURCE_ID_ATU_BIN_0, 96 MV88E6XXX_RESOURCE_ID_ATU_BIN_1, 97 MV88E6XXX_RESOURCE_ID_ATU_BIN_2, 98 MV88E6XXX_RESOURCE_ID_ATU_BIN_3, 99 }; 100 101 static u64 mv88e6xxx_devlink_atu_bin_get(struct mv88e6xxx_chip *chip, 102 u16 bin) 103 { 104 u16 occupancy = 0; 105 int err; 106 107 mv88e6xxx_reg_lock(chip); 108 109 err = mv88e6xxx_g2_atu_stats_set(chip, MV88E6XXX_G2_ATU_STATS_MODE_ALL, 110 bin); 111 if (err) { 112 dev_err(chip->dev, "failed to set ATU stats kind/bin\n"); 113 goto unlock; 114 } 115 116 err = mv88e6xxx_g1_atu_get_next(chip, 0); 117 if (err) { 118 dev_err(chip->dev, "failed to perform ATU get next\n"); 119 goto unlock; 120 } 121 122 err = mv88e6xxx_g2_atu_stats_get(chip, &occupancy); 123 if (err) { 124 dev_err(chip->dev, "failed to get ATU stats\n"); 125 goto unlock; 126 } 127 128 occupancy &= MV88E6XXX_G2_ATU_STATS_MASK; 129 130 unlock: 131 mv88e6xxx_reg_unlock(chip); 132 133 return occupancy; 134 } 135 136 static u64 mv88e6xxx_devlink_atu_bin_0_get(void *priv) 137 { 138 struct mv88e6xxx_chip *chip = priv; 139 140 return mv88e6xxx_devlink_atu_bin_get(chip, 141 MV88E6XXX_G2_ATU_STATS_BIN_0); 142 } 143 144 static u64 mv88e6xxx_devlink_atu_bin_1_get(void *priv) 145 { 146 struct mv88e6xxx_chip *chip = priv; 147 148 return mv88e6xxx_devlink_atu_bin_get(chip, 149 MV88E6XXX_G2_ATU_STATS_BIN_1); 150 } 151 152 static u64 mv88e6xxx_devlink_atu_bin_2_get(void *priv) 153 { 154 struct mv88e6xxx_chip *chip = priv; 155 156 return mv88e6xxx_devlink_atu_bin_get(chip, 157 MV88E6XXX_G2_ATU_STATS_BIN_2); 158 } 159 160 static u64 mv88e6xxx_devlink_atu_bin_3_get(void *priv) 161 { 162 struct mv88e6xxx_chip *chip = priv; 163 164 return mv88e6xxx_devlink_atu_bin_get(chip, 165 MV88E6XXX_G2_ATU_STATS_BIN_3); 166 } 167 168 static u64 mv88e6xxx_devlink_atu_get(void *priv) 169 { 170 return mv88e6xxx_devlink_atu_bin_0_get(priv) + 171 mv88e6xxx_devlink_atu_bin_1_get(priv) + 172 mv88e6xxx_devlink_atu_bin_2_get(priv) + 173 mv88e6xxx_devlink_atu_bin_3_get(priv); 174 } 175 176 int mv88e6xxx_setup_devlink_resources(struct dsa_switch *ds) 177 { 178 struct devlink_resource_size_params size_params; 179 struct mv88e6xxx_chip *chip = ds->priv; 180 int err; 181 182 devlink_resource_size_params_init(&size_params, 183 mv88e6xxx_num_macs(chip), 184 mv88e6xxx_num_macs(chip), 185 1, DEVLINK_RESOURCE_UNIT_ENTRY); 186 187 err = dsa_devlink_resource_register(ds, "ATU", 188 mv88e6xxx_num_macs(chip), 189 MV88E6XXX_RESOURCE_ID_ATU, 190 DEVLINK_RESOURCE_ID_PARENT_TOP, 191 &size_params); 192 if (err) 193 goto out; 194 195 devlink_resource_size_params_init(&size_params, 196 mv88e6xxx_num_macs(chip) / 4, 197 mv88e6xxx_num_macs(chip) / 4, 198 1, DEVLINK_RESOURCE_UNIT_ENTRY); 199 200 err = dsa_devlink_resource_register(ds, "ATU_bin_0", 201 mv88e6xxx_num_macs(chip) / 4, 202 MV88E6XXX_RESOURCE_ID_ATU_BIN_0, 203 MV88E6XXX_RESOURCE_ID_ATU, 204 &size_params); 205 if (err) 206 goto out; 207 208 err = dsa_devlink_resource_register(ds, "ATU_bin_1", 209 mv88e6xxx_num_macs(chip) / 4, 210 MV88E6XXX_RESOURCE_ID_ATU_BIN_1, 211 MV88E6XXX_RESOURCE_ID_ATU, 212 &size_params); 213 if (err) 214 goto out; 215 216 err = dsa_devlink_resource_register(ds, "ATU_bin_2", 217 mv88e6xxx_num_macs(chip) / 4, 218 MV88E6XXX_RESOURCE_ID_ATU_BIN_2, 219 MV88E6XXX_RESOURCE_ID_ATU, 220 &size_params); 221 if (err) 222 goto out; 223 224 err = dsa_devlink_resource_register(ds, "ATU_bin_3", 225 mv88e6xxx_num_macs(chip) / 4, 226 MV88E6XXX_RESOURCE_ID_ATU_BIN_3, 227 MV88E6XXX_RESOURCE_ID_ATU, 228 &size_params); 229 if (err) 230 goto out; 231 232 dsa_devlink_resource_occ_get_register(ds, 233 MV88E6XXX_RESOURCE_ID_ATU, 234 mv88e6xxx_devlink_atu_get, 235 chip); 236 237 dsa_devlink_resource_occ_get_register(ds, 238 MV88E6XXX_RESOURCE_ID_ATU_BIN_0, 239 mv88e6xxx_devlink_atu_bin_0_get, 240 chip); 241 242 dsa_devlink_resource_occ_get_register(ds, 243 MV88E6XXX_RESOURCE_ID_ATU_BIN_1, 244 mv88e6xxx_devlink_atu_bin_1_get, 245 chip); 246 247 dsa_devlink_resource_occ_get_register(ds, 248 MV88E6XXX_RESOURCE_ID_ATU_BIN_2, 249 mv88e6xxx_devlink_atu_bin_2_get, 250 chip); 251 252 dsa_devlink_resource_occ_get_register(ds, 253 MV88E6XXX_RESOURCE_ID_ATU_BIN_3, 254 mv88e6xxx_devlink_atu_bin_3_get, 255 chip); 256 257 return 0; 258 259 out: 260 dsa_devlink_resources_unregister(ds); 261 return err; 262 } 263 264 static int mv88e6xxx_region_global_snapshot(struct devlink *dl, 265 const struct devlink_region_ops *ops, 266 struct netlink_ext_ack *extack, 267 u8 **data) 268 { 269 struct mv88e6xxx_region_priv *region_priv = ops->priv; 270 struct dsa_switch *ds = dsa_devlink_to_ds(dl); 271 struct mv88e6xxx_chip *chip = ds->priv; 272 u16 *registers; 273 int i, err; 274 275 registers = kmalloc_array(32, sizeof(u16), GFP_KERNEL); 276 if (!registers) 277 return -ENOMEM; 278 279 mv88e6xxx_reg_lock(chip); 280 for (i = 0; i < 32; i++) { 281 switch (region_priv->id) { 282 case MV88E6XXX_REGION_GLOBAL1: 283 err = mv88e6xxx_g1_read(chip, i, ®isters[i]); 284 break; 285 case MV88E6XXX_REGION_GLOBAL2: 286 err = mv88e6xxx_g2_read(chip, i, ®isters[i]); 287 break; 288 default: 289 err = -EOPNOTSUPP; 290 } 291 292 if (err) { 293 kfree(registers); 294 goto out; 295 } 296 } 297 *data = (u8 *)registers; 298 out: 299 mv88e6xxx_reg_unlock(chip); 300 301 return err; 302 } 303 304 /* The ATU entry varies between mv88e6xxx chipset generations. Define 305 * a generic format which covers all the current and hopefully future 306 * mv88e6xxx generations 307 */ 308 309 struct mv88e6xxx_devlink_atu_entry { 310 /* The FID is scattered over multiple registers. */ 311 u16 fid; 312 u16 atu_op; 313 u16 atu_data; 314 u16 atu_01; 315 u16 atu_23; 316 u16 atu_45; 317 }; 318 319 static int mv88e6xxx_region_atu_snapshot_fid(struct mv88e6xxx_chip *chip, 320 int fid, 321 struct mv88e6xxx_devlink_atu_entry *table, 322 int *count) 323 { 324 u16 atu_op, atu_data, atu_01, atu_23, atu_45; 325 struct mv88e6xxx_atu_entry addr; 326 int err; 327 328 addr.state = 0; 329 eth_broadcast_addr(addr.mac); 330 331 do { 332 err = mv88e6xxx_g1_atu_getnext(chip, fid, &addr); 333 if (err) 334 return err; 335 336 if (!addr.state) 337 break; 338 339 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_ATU_OP, &atu_op); 340 if (err) 341 return err; 342 343 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_ATU_DATA, &atu_data); 344 if (err) 345 return err; 346 347 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_ATU_MAC01, &atu_01); 348 if (err) 349 return err; 350 351 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_ATU_MAC23, &atu_23); 352 if (err) 353 return err; 354 355 err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_ATU_MAC45, &atu_45); 356 if (err) 357 return err; 358 359 table[*count].fid = fid; 360 table[*count].atu_op = atu_op; 361 table[*count].atu_data = atu_data; 362 table[*count].atu_01 = atu_01; 363 table[*count].atu_23 = atu_23; 364 table[*count].atu_45 = atu_45; 365 (*count)++; 366 } while (!is_broadcast_ether_addr(addr.mac)); 367 368 return 0; 369 } 370 371 static int mv88e6xxx_region_atu_snapshot(struct devlink *dl, 372 const struct devlink_region_ops *ops, 373 struct netlink_ext_ack *extack, 374 u8 **data) 375 { 376 struct dsa_switch *ds = dsa_devlink_to_ds(dl); 377 DECLARE_BITMAP(fid_bitmap, MV88E6XXX_N_FID); 378 struct mv88e6xxx_devlink_atu_entry *table; 379 struct mv88e6xxx_chip *chip = ds->priv; 380 int fid = -1, count, err; 381 382 table = kmalloc_array(mv88e6xxx_num_databases(chip), 383 sizeof(struct mv88e6xxx_devlink_atu_entry), 384 GFP_KERNEL); 385 if (!table) 386 return -ENOMEM; 387 388 memset(table, 0, mv88e6xxx_num_databases(chip) * 389 sizeof(struct mv88e6xxx_devlink_atu_entry)); 390 391 count = 0; 392 393 mv88e6xxx_reg_lock(chip); 394 395 err = mv88e6xxx_fid_map(chip, fid_bitmap); 396 if (err) { 397 kfree(table); 398 goto out; 399 } 400 401 while (1) { 402 fid = find_next_bit(fid_bitmap, MV88E6XXX_N_FID, fid + 1); 403 if (fid == MV88E6XXX_N_FID) 404 break; 405 406 err = mv88e6xxx_region_atu_snapshot_fid(chip, fid, table, 407 &count); 408 if (err) { 409 kfree(table); 410 goto out; 411 } 412 } 413 *data = (u8 *)table; 414 out: 415 mv88e6xxx_reg_unlock(chip); 416 417 return err; 418 } 419 420 static int mv88e6xxx_region_port_snapshot(struct devlink_port *devlink_port, 421 const struct devlink_port_region_ops *ops, 422 struct netlink_ext_ack *extack, 423 u8 **data) 424 { 425 struct dsa_switch *ds = dsa_devlink_port_to_ds(devlink_port); 426 int port = dsa_devlink_port_to_port(devlink_port); 427 struct mv88e6xxx_chip *chip = ds->priv; 428 u16 *registers; 429 int i, err; 430 431 registers = kmalloc_array(32, sizeof(u16), GFP_KERNEL); 432 if (!registers) 433 return -ENOMEM; 434 435 mv88e6xxx_reg_lock(chip); 436 for (i = 0; i < 32; i++) { 437 err = mv88e6xxx_port_read(chip, port, i, ®isters[i]); 438 if (err) { 439 kfree(registers); 440 goto out; 441 } 442 } 443 *data = (u8 *)registers; 444 out: 445 mv88e6xxx_reg_unlock(chip); 446 447 return err; 448 } 449 450 static struct mv88e6xxx_region_priv mv88e6xxx_region_global1_priv = { 451 .id = MV88E6XXX_REGION_GLOBAL1, 452 }; 453 454 static struct devlink_region_ops mv88e6xxx_region_global1_ops = { 455 .name = "global1", 456 .snapshot = mv88e6xxx_region_global_snapshot, 457 .destructor = kfree, 458 .priv = &mv88e6xxx_region_global1_priv, 459 }; 460 461 static struct mv88e6xxx_region_priv mv88e6xxx_region_global2_priv = { 462 .id = MV88E6XXX_REGION_GLOBAL2, 463 }; 464 465 static struct devlink_region_ops mv88e6xxx_region_global2_ops = { 466 .name = "global2", 467 .snapshot = mv88e6xxx_region_global_snapshot, 468 .destructor = kfree, 469 .priv = &mv88e6xxx_region_global2_priv, 470 }; 471 472 static struct devlink_region_ops mv88e6xxx_region_atu_ops = { 473 .name = "atu", 474 .snapshot = mv88e6xxx_region_atu_snapshot, 475 .destructor = kfree, 476 }; 477 478 static const struct devlink_port_region_ops mv88e6xxx_region_port_ops = { 479 .name = "port", 480 .snapshot = mv88e6xxx_region_port_snapshot, 481 .destructor = kfree, 482 }; 483 484 struct mv88e6xxx_region { 485 struct devlink_region_ops *ops; 486 u64 size; 487 }; 488 489 static struct mv88e6xxx_region mv88e6xxx_regions[] = { 490 [MV88E6XXX_REGION_GLOBAL1] = { 491 .ops = &mv88e6xxx_region_global1_ops, 492 .size = 32 * sizeof(u16) 493 }, 494 [MV88E6XXX_REGION_GLOBAL2] = { 495 .ops = &mv88e6xxx_region_global2_ops, 496 .size = 32 * sizeof(u16) }, 497 [MV88E6XXX_REGION_ATU] = { 498 .ops = &mv88e6xxx_region_atu_ops 499 /* calculated at runtime */ 500 }, 501 }; 502 503 static void 504 mv88e6xxx_teardown_devlink_regions_global(struct mv88e6xxx_chip *chip) 505 { 506 int i; 507 508 for (i = 0; i < ARRAY_SIZE(mv88e6xxx_regions); i++) 509 dsa_devlink_region_destroy(chip->regions[i]); 510 } 511 512 static void 513 mv88e6xxx_teardown_devlink_regions_port(struct mv88e6xxx_chip *chip, 514 int port) 515 { 516 dsa_devlink_region_destroy(chip->ports[port].region); 517 } 518 519 static int mv88e6xxx_setup_devlink_regions_port(struct dsa_switch *ds, 520 struct mv88e6xxx_chip *chip, 521 int port) 522 { 523 struct devlink_region *region; 524 525 region = dsa_devlink_port_region_create(ds, 526 port, 527 &mv88e6xxx_region_port_ops, 1, 528 32 * sizeof(u16)); 529 if (IS_ERR(region)) 530 return PTR_ERR(region); 531 532 chip->ports[port].region = region; 533 534 return 0; 535 } 536 537 static void 538 mv88e6xxx_teardown_devlink_regions_ports(struct mv88e6xxx_chip *chip) 539 { 540 int port; 541 542 for (port = 0; port < mv88e6xxx_num_ports(chip); port++) 543 mv88e6xxx_teardown_devlink_regions_port(chip, port); 544 } 545 546 static int mv88e6xxx_setup_devlink_regions_ports(struct dsa_switch *ds, 547 struct mv88e6xxx_chip *chip) 548 { 549 int port; 550 int err; 551 552 for (port = 0; port < mv88e6xxx_num_ports(chip); port++) { 553 err = mv88e6xxx_setup_devlink_regions_port(ds, chip, port); 554 if (err) 555 goto out; 556 } 557 558 return 0; 559 560 out: 561 while (port-- > 0) 562 mv88e6xxx_teardown_devlink_regions_port(chip, port); 563 564 return err; 565 } 566 567 static int mv88e6xxx_setup_devlink_regions_global(struct dsa_switch *ds, 568 struct mv88e6xxx_chip *chip) 569 { 570 struct devlink_region_ops *ops; 571 struct devlink_region *region; 572 u64 size; 573 int i, j; 574 575 for (i = 0; i < ARRAY_SIZE(mv88e6xxx_regions); i++) { 576 ops = mv88e6xxx_regions[i].ops; 577 size = mv88e6xxx_regions[i].size; 578 579 if (i == MV88E6XXX_REGION_ATU) 580 size = mv88e6xxx_num_databases(chip) * 581 sizeof(struct mv88e6xxx_devlink_atu_entry); 582 583 region = dsa_devlink_region_create(ds, ops, 1, size); 584 if (IS_ERR(region)) 585 goto out; 586 chip->regions[i] = region; 587 } 588 return 0; 589 590 out: 591 for (j = 0; j < i; j++) 592 dsa_devlink_region_destroy(chip->regions[j]); 593 594 return PTR_ERR(region); 595 } 596 597 int mv88e6xxx_setup_devlink_regions(struct dsa_switch *ds) 598 { 599 struct mv88e6xxx_chip *chip = ds->priv; 600 int err; 601 602 err = mv88e6xxx_setup_devlink_regions_global(ds, chip); 603 if (err) 604 return err; 605 606 err = mv88e6xxx_setup_devlink_regions_ports(ds, chip); 607 if (err) 608 mv88e6xxx_teardown_devlink_regions_global(chip); 609 610 return err; 611 } 612 613 void mv88e6xxx_teardown_devlink_regions(struct dsa_switch *ds) 614 { 615 struct mv88e6xxx_chip *chip = ds->priv; 616 617 mv88e6xxx_teardown_devlink_regions_ports(chip); 618 mv88e6xxx_teardown_devlink_regions_global(chip); 619 } 620 621 int mv88e6xxx_devlink_info_get(struct dsa_switch *ds, 622 struct devlink_info_req *req, 623 struct netlink_ext_ack *extack) 624 { 625 struct mv88e6xxx_chip *chip = ds->priv; 626 int err; 627 628 err = devlink_info_driver_name_put(req, "mv88e6xxx"); 629 if (err) 630 return err; 631 632 return devlink_info_version_fixed_put(req, 633 DEVLINK_INFO_VERSION_GENERIC_ASIC_ID, 634 chip->info->name); 635 } 636