1 // SPDX-License-Identifier: (GPL-2.0 or MIT) 2 /* 3 * DSA driver for: 4 * Hirschmann Hellcreek TSN switch. 5 * 6 * Copyright (C) 2019-2021 Linutronix GmbH 7 * Author Kurt Kanzenbach <kurt@linutronix.de> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/device.h> 13 #include <linux/of.h> 14 #include <linux/of_device.h> 15 #include <linux/of_mdio.h> 16 #include <linux/platform_device.h> 17 #include <linux/bitops.h> 18 #include <linux/if_bridge.h> 19 #include <linux/if_vlan.h> 20 #include <linux/etherdevice.h> 21 #include <linux/random.h> 22 #include <linux/iopoll.h> 23 #include <linux/mutex.h> 24 #include <linux/delay.h> 25 #include <net/dsa.h> 26 27 #include "hellcreek.h" 28 #include "hellcreek_ptp.h" 29 #include "hellcreek_hwtstamp.h" 30 31 static const struct hellcreek_counter hellcreek_counter[] = { 32 { 0x00, "RxFiltered", }, 33 { 0x01, "RxOctets1k", }, 34 { 0x02, "RxVTAG", }, 35 { 0x03, "RxL2BAD", }, 36 { 0x04, "RxOverloadDrop", }, 37 { 0x05, "RxUC", }, 38 { 0x06, "RxMC", }, 39 { 0x07, "RxBC", }, 40 { 0x08, "RxRS<64", }, 41 { 0x09, "RxRS64", }, 42 { 0x0a, "RxRS65_127", }, 43 { 0x0b, "RxRS128_255", }, 44 { 0x0c, "RxRS256_511", }, 45 { 0x0d, "RxRS512_1023", }, 46 { 0x0e, "RxRS1024_1518", }, 47 { 0x0f, "RxRS>1518", }, 48 { 0x10, "TxTailDropQueue0", }, 49 { 0x11, "TxTailDropQueue1", }, 50 { 0x12, "TxTailDropQueue2", }, 51 { 0x13, "TxTailDropQueue3", }, 52 { 0x14, "TxTailDropQueue4", }, 53 { 0x15, "TxTailDropQueue5", }, 54 { 0x16, "TxTailDropQueue6", }, 55 { 0x17, "TxTailDropQueue7", }, 56 { 0x18, "RxTrafficClass0", }, 57 { 0x19, "RxTrafficClass1", }, 58 { 0x1a, "RxTrafficClass2", }, 59 { 0x1b, "RxTrafficClass3", }, 60 { 0x1c, "RxTrafficClass4", }, 61 { 0x1d, "RxTrafficClass5", }, 62 { 0x1e, "RxTrafficClass6", }, 63 { 0x1f, "RxTrafficClass7", }, 64 { 0x21, "TxOctets1k", }, 65 { 0x22, "TxVTAG", }, 66 { 0x23, "TxL2BAD", }, 67 { 0x25, "TxUC", }, 68 { 0x26, "TxMC", }, 69 { 0x27, "TxBC", }, 70 { 0x28, "TxTS<64", }, 71 { 0x29, "TxTS64", }, 72 { 0x2a, "TxTS65_127", }, 73 { 0x2b, "TxTS128_255", }, 74 { 0x2c, "TxTS256_511", }, 75 { 0x2d, "TxTS512_1023", }, 76 { 0x2e, "TxTS1024_1518", }, 77 { 0x2f, "TxTS>1518", }, 78 { 0x30, "TxTrafficClassOverrun0", }, 79 { 0x31, "TxTrafficClassOverrun1", }, 80 { 0x32, "TxTrafficClassOverrun2", }, 81 { 0x33, "TxTrafficClassOverrun3", }, 82 { 0x34, "TxTrafficClassOverrun4", }, 83 { 0x35, "TxTrafficClassOverrun5", }, 84 { 0x36, "TxTrafficClassOverrun6", }, 85 { 0x37, "TxTrafficClassOverrun7", }, 86 { 0x38, "TxTrafficClass0", }, 87 { 0x39, "TxTrafficClass1", }, 88 { 0x3a, "TxTrafficClass2", }, 89 { 0x3b, "TxTrafficClass3", }, 90 { 0x3c, "TxTrafficClass4", }, 91 { 0x3d, "TxTrafficClass5", }, 92 { 0x3e, "TxTrafficClass6", }, 93 { 0x3f, "TxTrafficClass7", }, 94 }; 95 96 static u16 hellcreek_read(struct hellcreek *hellcreek, unsigned int offset) 97 { 98 return readw(hellcreek->base + offset); 99 } 100 101 static u16 hellcreek_read_ctrl(struct hellcreek *hellcreek) 102 { 103 return readw(hellcreek->base + HR_CTRL_C); 104 } 105 106 static u16 hellcreek_read_stat(struct hellcreek *hellcreek) 107 { 108 return readw(hellcreek->base + HR_SWSTAT); 109 } 110 111 static void hellcreek_write(struct hellcreek *hellcreek, u16 data, 112 unsigned int offset) 113 { 114 writew(data, hellcreek->base + offset); 115 } 116 117 static void hellcreek_select_port(struct hellcreek *hellcreek, int port) 118 { 119 u16 val = port << HR_PSEL_PTWSEL_SHIFT; 120 121 hellcreek_write(hellcreek, val, HR_PSEL); 122 } 123 124 static void hellcreek_select_prio(struct hellcreek *hellcreek, int prio) 125 { 126 u16 val = prio << HR_PSEL_PRTCWSEL_SHIFT; 127 128 hellcreek_write(hellcreek, val, HR_PSEL); 129 } 130 131 static void hellcreek_select_port_prio(struct hellcreek *hellcreek, int port, 132 int prio) 133 { 134 u16 val = port << HR_PSEL_PTWSEL_SHIFT; 135 136 val |= prio << HR_PSEL_PRTCWSEL_SHIFT; 137 138 hellcreek_write(hellcreek, val, HR_PSEL); 139 } 140 141 static void hellcreek_select_counter(struct hellcreek *hellcreek, int counter) 142 { 143 u16 val = counter << HR_CSEL_SHIFT; 144 145 hellcreek_write(hellcreek, val, HR_CSEL); 146 147 /* Data sheet states to wait at least 20 internal clock cycles */ 148 ndelay(200); 149 } 150 151 static void hellcreek_select_vlan(struct hellcreek *hellcreek, int vid, 152 bool pvid) 153 { 154 u16 val = 0; 155 156 /* Set pvid bit first */ 157 if (pvid) 158 val |= HR_VIDCFG_PVID; 159 hellcreek_write(hellcreek, val, HR_VIDCFG); 160 161 /* Set vlan */ 162 val |= vid << HR_VIDCFG_VID_SHIFT; 163 hellcreek_write(hellcreek, val, HR_VIDCFG); 164 } 165 166 static void hellcreek_select_tgd(struct hellcreek *hellcreek, int port) 167 { 168 u16 val = port << TR_TGDSEL_TDGSEL_SHIFT; 169 170 hellcreek_write(hellcreek, val, TR_TGDSEL); 171 } 172 173 static int hellcreek_wait_until_ready(struct hellcreek *hellcreek) 174 { 175 u16 val; 176 177 /* Wait up to 1ms, although 3 us should be enough */ 178 return readx_poll_timeout(hellcreek_read_ctrl, hellcreek, 179 val, val & HR_CTRL_C_READY, 180 3, 1000); 181 } 182 183 static int hellcreek_wait_until_transitioned(struct hellcreek *hellcreek) 184 { 185 u16 val; 186 187 return readx_poll_timeout_atomic(hellcreek_read_ctrl, hellcreek, 188 val, !(val & HR_CTRL_C_TRANSITION), 189 1, 1000); 190 } 191 192 static int hellcreek_wait_fdb_ready(struct hellcreek *hellcreek) 193 { 194 u16 val; 195 196 return readx_poll_timeout_atomic(hellcreek_read_stat, hellcreek, 197 val, !(val & HR_SWSTAT_BUSY), 198 1, 1000); 199 } 200 201 static int hellcreek_detect(struct hellcreek *hellcreek) 202 { 203 u16 id, rel_low, rel_high, date_low, date_high, tgd_ver; 204 u8 tgd_maj, tgd_min; 205 u32 rel, date; 206 207 id = hellcreek_read(hellcreek, HR_MODID_C); 208 rel_low = hellcreek_read(hellcreek, HR_REL_L_C); 209 rel_high = hellcreek_read(hellcreek, HR_REL_H_C); 210 date_low = hellcreek_read(hellcreek, HR_BLD_L_C); 211 date_high = hellcreek_read(hellcreek, HR_BLD_H_C); 212 tgd_ver = hellcreek_read(hellcreek, TR_TGDVER); 213 214 if (id != hellcreek->pdata->module_id) 215 return -ENODEV; 216 217 rel = rel_low | (rel_high << 16); 218 date = date_low | (date_high << 16); 219 tgd_maj = (tgd_ver & TR_TGDVER_REV_MAJ_MASK) >> TR_TGDVER_REV_MAJ_SHIFT; 220 tgd_min = (tgd_ver & TR_TGDVER_REV_MIN_MASK) >> TR_TGDVER_REV_MIN_SHIFT; 221 222 dev_info(hellcreek->dev, "Module ID=%02x Release=%04x Date=%04x TGD Version=%02x.%02x\n", 223 id, rel, date, tgd_maj, tgd_min); 224 225 return 0; 226 } 227 228 static void hellcreek_feature_detect(struct hellcreek *hellcreek) 229 { 230 u16 features; 231 232 features = hellcreek_read(hellcreek, HR_FEABITS0); 233 234 /* Only detect the size of the FDB table. The size and current 235 * utilization can be queried via devlink. 236 */ 237 hellcreek->fdb_entries = ((features & HR_FEABITS0_FDBBINS_MASK) >> 238 HR_FEABITS0_FDBBINS_SHIFT) * 32; 239 } 240 241 static enum dsa_tag_protocol hellcreek_get_tag_protocol(struct dsa_switch *ds, 242 int port, 243 enum dsa_tag_protocol mp) 244 { 245 return DSA_TAG_PROTO_HELLCREEK; 246 } 247 248 static int hellcreek_port_enable(struct dsa_switch *ds, int port, 249 struct phy_device *phy) 250 { 251 struct hellcreek *hellcreek = ds->priv; 252 struct hellcreek_port *hellcreek_port; 253 u16 val; 254 255 hellcreek_port = &hellcreek->ports[port]; 256 257 dev_dbg(hellcreek->dev, "Enable port %d\n", port); 258 259 mutex_lock(&hellcreek->reg_lock); 260 261 hellcreek_select_port(hellcreek, port); 262 val = hellcreek_port->ptcfg; 263 val |= HR_PTCFG_ADMIN_EN; 264 hellcreek_write(hellcreek, val, HR_PTCFG); 265 hellcreek_port->ptcfg = val; 266 267 mutex_unlock(&hellcreek->reg_lock); 268 269 return 0; 270 } 271 272 static void hellcreek_port_disable(struct dsa_switch *ds, int port) 273 { 274 struct hellcreek *hellcreek = ds->priv; 275 struct hellcreek_port *hellcreek_port; 276 u16 val; 277 278 hellcreek_port = &hellcreek->ports[port]; 279 280 dev_dbg(hellcreek->dev, "Disable port %d\n", port); 281 282 mutex_lock(&hellcreek->reg_lock); 283 284 hellcreek_select_port(hellcreek, port); 285 val = hellcreek_port->ptcfg; 286 val &= ~HR_PTCFG_ADMIN_EN; 287 hellcreek_write(hellcreek, val, HR_PTCFG); 288 hellcreek_port->ptcfg = val; 289 290 mutex_unlock(&hellcreek->reg_lock); 291 } 292 293 static void hellcreek_get_strings(struct dsa_switch *ds, int port, 294 u32 stringset, uint8_t *data) 295 { 296 int i; 297 298 for (i = 0; i < ARRAY_SIZE(hellcreek_counter); ++i) { 299 const struct hellcreek_counter *counter = &hellcreek_counter[i]; 300 301 strscpy(data + i * ETH_GSTRING_LEN, 302 counter->name, ETH_GSTRING_LEN); 303 } 304 } 305 306 static int hellcreek_get_sset_count(struct dsa_switch *ds, int port, int sset) 307 { 308 if (sset != ETH_SS_STATS) 309 return 0; 310 311 return ARRAY_SIZE(hellcreek_counter); 312 } 313 314 static void hellcreek_get_ethtool_stats(struct dsa_switch *ds, int port, 315 uint64_t *data) 316 { 317 struct hellcreek *hellcreek = ds->priv; 318 struct hellcreek_port *hellcreek_port; 319 int i; 320 321 hellcreek_port = &hellcreek->ports[port]; 322 323 for (i = 0; i < ARRAY_SIZE(hellcreek_counter); ++i) { 324 const struct hellcreek_counter *counter = &hellcreek_counter[i]; 325 u8 offset = counter->offset + port * 64; 326 u16 high, low; 327 u64 value; 328 329 mutex_lock(&hellcreek->reg_lock); 330 331 hellcreek_select_counter(hellcreek, offset); 332 333 /* The registers are locked internally by selecting the 334 * counter. So low and high can be read without reading high 335 * again. 336 */ 337 high = hellcreek_read(hellcreek, HR_CRDH); 338 low = hellcreek_read(hellcreek, HR_CRDL); 339 value = ((u64)high << 16) | low; 340 341 hellcreek_port->counter_values[i] += value; 342 data[i] = hellcreek_port->counter_values[i]; 343 344 mutex_unlock(&hellcreek->reg_lock); 345 } 346 } 347 348 static u16 hellcreek_private_vid(int port) 349 { 350 return VLAN_N_VID - port + 1; 351 } 352 353 static int hellcreek_vlan_prepare(struct dsa_switch *ds, int port, 354 const struct switchdev_obj_port_vlan *vlan, 355 struct netlink_ext_ack *extack) 356 { 357 struct hellcreek *hellcreek = ds->priv; 358 int i; 359 360 dev_dbg(hellcreek->dev, "VLAN prepare for port %d\n", port); 361 362 /* Restriction: Make sure that nobody uses the "private" VLANs. These 363 * VLANs are internally used by the driver to ensure port 364 * separation. Thus, they cannot be used by someone else. 365 */ 366 for (i = 0; i < hellcreek->pdata->num_ports; ++i) { 367 const u16 restricted_vid = hellcreek_private_vid(i); 368 369 if (!dsa_is_user_port(ds, i)) 370 continue; 371 372 if (vlan->vid == restricted_vid) { 373 NL_SET_ERR_MSG_MOD(extack, "VID restricted by driver"); 374 return -EBUSY; 375 } 376 } 377 378 return 0; 379 } 380 381 static void hellcreek_select_vlan_params(struct hellcreek *hellcreek, int port, 382 int *shift, int *mask) 383 { 384 switch (port) { 385 case 0: 386 *shift = HR_VIDMBRCFG_P0MBR_SHIFT; 387 *mask = HR_VIDMBRCFG_P0MBR_MASK; 388 break; 389 case 1: 390 *shift = HR_VIDMBRCFG_P1MBR_SHIFT; 391 *mask = HR_VIDMBRCFG_P1MBR_MASK; 392 break; 393 case 2: 394 *shift = HR_VIDMBRCFG_P2MBR_SHIFT; 395 *mask = HR_VIDMBRCFG_P2MBR_MASK; 396 break; 397 case 3: 398 *shift = HR_VIDMBRCFG_P3MBR_SHIFT; 399 *mask = HR_VIDMBRCFG_P3MBR_MASK; 400 break; 401 default: 402 *shift = *mask = 0; 403 dev_err(hellcreek->dev, "Unknown port %d selected!\n", port); 404 } 405 } 406 407 static void hellcreek_apply_vlan(struct hellcreek *hellcreek, int port, u16 vid, 408 bool pvid, bool untagged) 409 { 410 int shift, mask; 411 u16 val; 412 413 dev_dbg(hellcreek->dev, "Apply VLAN: port=%d vid=%u pvid=%d untagged=%d", 414 port, vid, pvid, untagged); 415 416 mutex_lock(&hellcreek->reg_lock); 417 418 hellcreek_select_port(hellcreek, port); 419 hellcreek_select_vlan(hellcreek, vid, pvid); 420 421 /* Setup port vlan membership */ 422 hellcreek_select_vlan_params(hellcreek, port, &shift, &mask); 423 val = hellcreek->vidmbrcfg[vid]; 424 val &= ~mask; 425 if (untagged) 426 val |= HELLCREEK_VLAN_UNTAGGED_MEMBER << shift; 427 else 428 val |= HELLCREEK_VLAN_TAGGED_MEMBER << shift; 429 430 hellcreek_write(hellcreek, val, HR_VIDMBRCFG); 431 hellcreek->vidmbrcfg[vid] = val; 432 433 mutex_unlock(&hellcreek->reg_lock); 434 } 435 436 static void hellcreek_unapply_vlan(struct hellcreek *hellcreek, int port, 437 u16 vid) 438 { 439 int shift, mask; 440 u16 val; 441 442 dev_dbg(hellcreek->dev, "Unapply VLAN: port=%d vid=%u\n", port, vid); 443 444 mutex_lock(&hellcreek->reg_lock); 445 446 hellcreek_select_vlan(hellcreek, vid, false); 447 448 /* Setup port vlan membership */ 449 hellcreek_select_vlan_params(hellcreek, port, &shift, &mask); 450 val = hellcreek->vidmbrcfg[vid]; 451 val &= ~mask; 452 val |= HELLCREEK_VLAN_NO_MEMBER << shift; 453 454 hellcreek_write(hellcreek, val, HR_VIDMBRCFG); 455 hellcreek->vidmbrcfg[vid] = val; 456 457 mutex_unlock(&hellcreek->reg_lock); 458 } 459 460 static int hellcreek_vlan_add(struct dsa_switch *ds, int port, 461 const struct switchdev_obj_port_vlan *vlan, 462 struct netlink_ext_ack *extack) 463 { 464 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; 465 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID; 466 struct hellcreek *hellcreek = ds->priv; 467 int err; 468 469 err = hellcreek_vlan_prepare(ds, port, vlan, extack); 470 if (err) 471 return err; 472 473 dev_dbg(hellcreek->dev, "Add VLAN %d on port %d, %s, %s\n", 474 vlan->vid, port, untagged ? "untagged" : "tagged", 475 pvid ? "PVID" : "no PVID"); 476 477 hellcreek_apply_vlan(hellcreek, port, vlan->vid, pvid, untagged); 478 479 return 0; 480 } 481 482 static int hellcreek_vlan_del(struct dsa_switch *ds, int port, 483 const struct switchdev_obj_port_vlan *vlan) 484 { 485 struct hellcreek *hellcreek = ds->priv; 486 487 dev_dbg(hellcreek->dev, "Remove VLAN %d on port %d\n", vlan->vid, port); 488 489 hellcreek_unapply_vlan(hellcreek, port, vlan->vid); 490 491 return 0; 492 } 493 494 static void hellcreek_port_stp_state_set(struct dsa_switch *ds, int port, 495 u8 state) 496 { 497 struct hellcreek *hellcreek = ds->priv; 498 struct hellcreek_port *hellcreek_port; 499 const char *new_state; 500 u16 val; 501 502 mutex_lock(&hellcreek->reg_lock); 503 504 hellcreek_port = &hellcreek->ports[port]; 505 val = hellcreek_port->ptcfg; 506 507 switch (state) { 508 case BR_STATE_DISABLED: 509 new_state = "DISABLED"; 510 val |= HR_PTCFG_BLOCKED; 511 val &= ~HR_PTCFG_LEARNING_EN; 512 break; 513 case BR_STATE_BLOCKING: 514 new_state = "BLOCKING"; 515 val |= HR_PTCFG_BLOCKED; 516 val &= ~HR_PTCFG_LEARNING_EN; 517 break; 518 case BR_STATE_LISTENING: 519 new_state = "LISTENING"; 520 val |= HR_PTCFG_BLOCKED; 521 val &= ~HR_PTCFG_LEARNING_EN; 522 break; 523 case BR_STATE_LEARNING: 524 new_state = "LEARNING"; 525 val |= HR_PTCFG_BLOCKED; 526 val |= HR_PTCFG_LEARNING_EN; 527 break; 528 case BR_STATE_FORWARDING: 529 new_state = "FORWARDING"; 530 val &= ~HR_PTCFG_BLOCKED; 531 val |= HR_PTCFG_LEARNING_EN; 532 break; 533 default: 534 new_state = "UNKNOWN"; 535 } 536 537 hellcreek_select_port(hellcreek, port); 538 hellcreek_write(hellcreek, val, HR_PTCFG); 539 hellcreek_port->ptcfg = val; 540 541 mutex_unlock(&hellcreek->reg_lock); 542 543 dev_dbg(hellcreek->dev, "Configured STP state for port %d: %s\n", 544 port, new_state); 545 } 546 547 static void hellcreek_setup_ingressflt(struct hellcreek *hellcreek, int port, 548 bool enable) 549 { 550 struct hellcreek_port *hellcreek_port = &hellcreek->ports[port]; 551 u16 ptcfg; 552 553 mutex_lock(&hellcreek->reg_lock); 554 555 ptcfg = hellcreek_port->ptcfg; 556 557 if (enable) 558 ptcfg |= HR_PTCFG_INGRESSFLT; 559 else 560 ptcfg &= ~HR_PTCFG_INGRESSFLT; 561 562 hellcreek_select_port(hellcreek, port); 563 hellcreek_write(hellcreek, ptcfg, HR_PTCFG); 564 hellcreek_port->ptcfg = ptcfg; 565 566 mutex_unlock(&hellcreek->reg_lock); 567 } 568 569 static void hellcreek_setup_vlan_awareness(struct hellcreek *hellcreek, 570 bool enable) 571 { 572 u16 swcfg; 573 574 mutex_lock(&hellcreek->reg_lock); 575 576 swcfg = hellcreek->swcfg; 577 578 if (enable) 579 swcfg |= HR_SWCFG_VLAN_UNAWARE; 580 else 581 swcfg &= ~HR_SWCFG_VLAN_UNAWARE; 582 583 hellcreek_write(hellcreek, swcfg, HR_SWCFG); 584 585 mutex_unlock(&hellcreek->reg_lock); 586 } 587 588 /* Default setup for DSA: VLAN <X>: CPU and Port <X> egress untagged. */ 589 static void hellcreek_setup_vlan_membership(struct dsa_switch *ds, int port, 590 bool enabled) 591 { 592 const u16 vid = hellcreek_private_vid(port); 593 int upstream = dsa_upstream_port(ds, port); 594 struct hellcreek *hellcreek = ds->priv; 595 596 /* Apply vid to port as egress untagged and port vlan id */ 597 if (enabled) 598 hellcreek_apply_vlan(hellcreek, port, vid, true, true); 599 else 600 hellcreek_unapply_vlan(hellcreek, port, vid); 601 602 /* Apply vid to cpu port as well */ 603 if (enabled) 604 hellcreek_apply_vlan(hellcreek, upstream, vid, false, true); 605 else 606 hellcreek_unapply_vlan(hellcreek, upstream, vid); 607 } 608 609 static void hellcreek_port_set_ucast_flood(struct hellcreek *hellcreek, 610 int port, bool enable) 611 { 612 struct hellcreek_port *hellcreek_port; 613 u16 val; 614 615 hellcreek_port = &hellcreek->ports[port]; 616 617 dev_dbg(hellcreek->dev, "%s unicast flooding on port %d\n", 618 enable ? "Enable" : "Disable", port); 619 620 mutex_lock(&hellcreek->reg_lock); 621 622 hellcreek_select_port(hellcreek, port); 623 val = hellcreek_port->ptcfg; 624 if (enable) 625 val &= ~HR_PTCFG_UUC_FLT; 626 else 627 val |= HR_PTCFG_UUC_FLT; 628 hellcreek_write(hellcreek, val, HR_PTCFG); 629 hellcreek_port->ptcfg = val; 630 631 mutex_unlock(&hellcreek->reg_lock); 632 } 633 634 static void hellcreek_port_set_mcast_flood(struct hellcreek *hellcreek, 635 int port, bool enable) 636 { 637 struct hellcreek_port *hellcreek_port; 638 u16 val; 639 640 hellcreek_port = &hellcreek->ports[port]; 641 642 dev_dbg(hellcreek->dev, "%s multicast flooding on port %d\n", 643 enable ? "Enable" : "Disable", port); 644 645 mutex_lock(&hellcreek->reg_lock); 646 647 hellcreek_select_port(hellcreek, port); 648 val = hellcreek_port->ptcfg; 649 if (enable) 650 val &= ~HR_PTCFG_UMC_FLT; 651 else 652 val |= HR_PTCFG_UMC_FLT; 653 hellcreek_write(hellcreek, val, HR_PTCFG); 654 hellcreek_port->ptcfg = val; 655 656 mutex_unlock(&hellcreek->reg_lock); 657 } 658 659 static int hellcreek_pre_bridge_flags(struct dsa_switch *ds, int port, 660 struct switchdev_brport_flags flags, 661 struct netlink_ext_ack *extack) 662 { 663 if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD)) 664 return -EINVAL; 665 666 return 0; 667 } 668 669 static int hellcreek_bridge_flags(struct dsa_switch *ds, int port, 670 struct switchdev_brport_flags flags, 671 struct netlink_ext_ack *extack) 672 { 673 struct hellcreek *hellcreek = ds->priv; 674 675 if (flags.mask & BR_FLOOD) 676 hellcreek_port_set_ucast_flood(hellcreek, port, 677 !!(flags.val & BR_FLOOD)); 678 679 if (flags.mask & BR_MCAST_FLOOD) 680 hellcreek_port_set_mcast_flood(hellcreek, port, 681 !!(flags.val & BR_MCAST_FLOOD)); 682 683 return 0; 684 } 685 686 static int hellcreek_port_bridge_join(struct dsa_switch *ds, int port, 687 struct dsa_bridge bridge, 688 bool *tx_fwd_offload, 689 struct netlink_ext_ack *extack) 690 { 691 struct hellcreek *hellcreek = ds->priv; 692 693 dev_dbg(hellcreek->dev, "Port %d joins a bridge\n", port); 694 695 /* When joining a vlan_filtering bridge, keep the switch VLAN aware */ 696 if (!ds->vlan_filtering) 697 hellcreek_setup_vlan_awareness(hellcreek, false); 698 699 /* Drop private vlans */ 700 hellcreek_setup_vlan_membership(ds, port, false); 701 702 return 0; 703 } 704 705 static void hellcreek_port_bridge_leave(struct dsa_switch *ds, int port, 706 struct dsa_bridge bridge) 707 { 708 struct hellcreek *hellcreek = ds->priv; 709 710 dev_dbg(hellcreek->dev, "Port %d leaves a bridge\n", port); 711 712 /* Enable VLAN awareness */ 713 hellcreek_setup_vlan_awareness(hellcreek, true); 714 715 /* Enable private vlans */ 716 hellcreek_setup_vlan_membership(ds, port, true); 717 } 718 719 static int __hellcreek_fdb_add(struct hellcreek *hellcreek, 720 const struct hellcreek_fdb_entry *entry) 721 { 722 u16 meta = 0; 723 724 dev_dbg(hellcreek->dev, "Add static FDB entry: MAC=%pM, MASK=0x%02x, " 725 "OBT=%d, PASS_BLOCKED=%d, REPRIO_EN=%d, PRIO=%d\n", entry->mac, 726 entry->portmask, entry->is_obt, entry->pass_blocked, 727 entry->reprio_en, entry->reprio_tc); 728 729 /* Add mac address */ 730 hellcreek_write(hellcreek, entry->mac[1] | (entry->mac[0] << 8), HR_FDBWDH); 731 hellcreek_write(hellcreek, entry->mac[3] | (entry->mac[2] << 8), HR_FDBWDM); 732 hellcreek_write(hellcreek, entry->mac[5] | (entry->mac[4] << 8), HR_FDBWDL); 733 734 /* Meta data */ 735 meta |= entry->portmask << HR_FDBWRM0_PORTMASK_SHIFT; 736 if (entry->is_obt) 737 meta |= HR_FDBWRM0_OBT; 738 if (entry->pass_blocked) 739 meta |= HR_FDBWRM0_PASS_BLOCKED; 740 if (entry->reprio_en) { 741 meta |= HR_FDBWRM0_REPRIO_EN; 742 meta |= entry->reprio_tc << HR_FDBWRM0_REPRIO_TC_SHIFT; 743 } 744 hellcreek_write(hellcreek, meta, HR_FDBWRM0); 745 746 /* Commit */ 747 hellcreek_write(hellcreek, 0x00, HR_FDBWRCMD); 748 749 /* Wait until done */ 750 return hellcreek_wait_fdb_ready(hellcreek); 751 } 752 753 static int __hellcreek_fdb_del(struct hellcreek *hellcreek, 754 const struct hellcreek_fdb_entry *entry) 755 { 756 dev_dbg(hellcreek->dev, "Delete FDB entry: MAC=%pM!\n", entry->mac); 757 758 /* Delete by matching idx */ 759 hellcreek_write(hellcreek, entry->idx | HR_FDBWRCMD_FDBDEL, HR_FDBWRCMD); 760 761 /* Wait until done */ 762 return hellcreek_wait_fdb_ready(hellcreek); 763 } 764 765 static void hellcreek_populate_fdb_entry(struct hellcreek *hellcreek, 766 struct hellcreek_fdb_entry *entry, 767 size_t idx) 768 { 769 unsigned char addr[ETH_ALEN]; 770 u16 meta, mac; 771 772 /* Read values */ 773 meta = hellcreek_read(hellcreek, HR_FDBMDRD); 774 mac = hellcreek_read(hellcreek, HR_FDBRDL); 775 addr[5] = mac & 0xff; 776 addr[4] = (mac & 0xff00) >> 8; 777 mac = hellcreek_read(hellcreek, HR_FDBRDM); 778 addr[3] = mac & 0xff; 779 addr[2] = (mac & 0xff00) >> 8; 780 mac = hellcreek_read(hellcreek, HR_FDBRDH); 781 addr[1] = mac & 0xff; 782 addr[0] = (mac & 0xff00) >> 8; 783 784 /* Populate @entry */ 785 memcpy(entry->mac, addr, sizeof(addr)); 786 entry->idx = idx; 787 entry->portmask = (meta & HR_FDBMDRD_PORTMASK_MASK) >> 788 HR_FDBMDRD_PORTMASK_SHIFT; 789 entry->age = (meta & HR_FDBMDRD_AGE_MASK) >> 790 HR_FDBMDRD_AGE_SHIFT; 791 entry->is_obt = !!(meta & HR_FDBMDRD_OBT); 792 entry->pass_blocked = !!(meta & HR_FDBMDRD_PASS_BLOCKED); 793 entry->is_static = !!(meta & HR_FDBMDRD_STATIC); 794 entry->reprio_tc = (meta & HR_FDBMDRD_REPRIO_TC_MASK) >> 795 HR_FDBMDRD_REPRIO_TC_SHIFT; 796 entry->reprio_en = !!(meta & HR_FDBMDRD_REPRIO_EN); 797 } 798 799 /* Retrieve the index of a FDB entry by mac address. Currently we search through 800 * the complete table in hardware. If that's too slow, we might have to cache 801 * the complete FDB table in software. 802 */ 803 static int hellcreek_fdb_get(struct hellcreek *hellcreek, 804 const unsigned char *dest, 805 struct hellcreek_fdb_entry *entry) 806 { 807 size_t i; 808 809 /* Set read pointer to zero: The read of HR_FDBMAX (read-only register) 810 * should reset the internal pointer. But, that doesn't work. The vendor 811 * suggested a subsequent write as workaround. Same for HR_FDBRDH below. 812 */ 813 hellcreek_read(hellcreek, HR_FDBMAX); 814 hellcreek_write(hellcreek, 0x00, HR_FDBMAX); 815 816 /* We have to read the complete table, because the switch/driver might 817 * enter new entries anywhere. 818 */ 819 for (i = 0; i < hellcreek->fdb_entries; ++i) { 820 struct hellcreek_fdb_entry tmp = { 0 }; 821 822 /* Read entry */ 823 hellcreek_populate_fdb_entry(hellcreek, &tmp, i); 824 825 /* Force next entry */ 826 hellcreek_write(hellcreek, 0x00, HR_FDBRDH); 827 828 if (memcmp(tmp.mac, dest, ETH_ALEN)) 829 continue; 830 831 /* Match found */ 832 memcpy(entry, &tmp, sizeof(*entry)); 833 834 return 0; 835 } 836 837 return -ENOENT; 838 } 839 840 static int hellcreek_fdb_add(struct dsa_switch *ds, int port, 841 const unsigned char *addr, u16 vid, 842 struct dsa_db db) 843 { 844 struct hellcreek_fdb_entry entry = { 0 }; 845 struct hellcreek *hellcreek = ds->priv; 846 int ret; 847 848 dev_dbg(hellcreek->dev, "Add FDB entry for MAC=%pM\n", addr); 849 850 mutex_lock(&hellcreek->reg_lock); 851 852 ret = hellcreek_fdb_get(hellcreek, addr, &entry); 853 if (ret) { 854 /* Not found */ 855 memcpy(entry.mac, addr, sizeof(entry.mac)); 856 entry.portmask = BIT(port); 857 858 ret = __hellcreek_fdb_add(hellcreek, &entry); 859 if (ret) { 860 dev_err(hellcreek->dev, "Failed to add FDB entry!\n"); 861 goto out; 862 } 863 } else { 864 /* Found */ 865 ret = __hellcreek_fdb_del(hellcreek, &entry); 866 if (ret) { 867 dev_err(hellcreek->dev, "Failed to delete FDB entry!\n"); 868 goto out; 869 } 870 871 entry.portmask |= BIT(port); 872 873 ret = __hellcreek_fdb_add(hellcreek, &entry); 874 if (ret) { 875 dev_err(hellcreek->dev, "Failed to add FDB entry!\n"); 876 goto out; 877 } 878 } 879 880 out: 881 mutex_unlock(&hellcreek->reg_lock); 882 883 return ret; 884 } 885 886 static int hellcreek_fdb_del(struct dsa_switch *ds, int port, 887 const unsigned char *addr, u16 vid, 888 struct dsa_db db) 889 { 890 struct hellcreek_fdb_entry entry = { 0 }; 891 struct hellcreek *hellcreek = ds->priv; 892 int ret; 893 894 dev_dbg(hellcreek->dev, "Delete FDB entry for MAC=%pM\n", addr); 895 896 mutex_lock(&hellcreek->reg_lock); 897 898 ret = hellcreek_fdb_get(hellcreek, addr, &entry); 899 if (ret) { 900 /* Not found */ 901 dev_err(hellcreek->dev, "FDB entry for deletion not found!\n"); 902 } else { 903 /* Found */ 904 ret = __hellcreek_fdb_del(hellcreek, &entry); 905 if (ret) { 906 dev_err(hellcreek->dev, "Failed to delete FDB entry!\n"); 907 goto out; 908 } 909 910 entry.portmask &= ~BIT(port); 911 912 if (entry.portmask != 0x00) { 913 ret = __hellcreek_fdb_add(hellcreek, &entry); 914 if (ret) { 915 dev_err(hellcreek->dev, "Failed to add FDB entry!\n"); 916 goto out; 917 } 918 } 919 } 920 921 out: 922 mutex_unlock(&hellcreek->reg_lock); 923 924 return ret; 925 } 926 927 static int hellcreek_fdb_dump(struct dsa_switch *ds, int port, 928 dsa_fdb_dump_cb_t *cb, void *data) 929 { 930 struct hellcreek *hellcreek = ds->priv; 931 u16 entries; 932 int ret = 0; 933 size_t i; 934 935 mutex_lock(&hellcreek->reg_lock); 936 937 /* Set read pointer to zero: The read of HR_FDBMAX (read-only register) 938 * should reset the internal pointer. But, that doesn't work. The vendor 939 * suggested a subsequent write as workaround. Same for HR_FDBRDH below. 940 */ 941 entries = hellcreek_read(hellcreek, HR_FDBMAX); 942 hellcreek_write(hellcreek, 0x00, HR_FDBMAX); 943 944 dev_dbg(hellcreek->dev, "FDB dump for port %d, entries=%d!\n", port, entries); 945 946 /* Read table */ 947 for (i = 0; i < hellcreek->fdb_entries; ++i) { 948 struct hellcreek_fdb_entry entry = { 0 }; 949 950 /* Read entry */ 951 hellcreek_populate_fdb_entry(hellcreek, &entry, i); 952 953 /* Force next entry */ 954 hellcreek_write(hellcreek, 0x00, HR_FDBRDH); 955 956 /* Check valid */ 957 if (is_zero_ether_addr(entry.mac)) 958 continue; 959 960 /* Check port mask */ 961 if (!(entry.portmask & BIT(port))) 962 continue; 963 964 ret = cb(entry.mac, 0, entry.is_static, data); 965 if (ret) 966 break; 967 } 968 969 mutex_unlock(&hellcreek->reg_lock); 970 971 return ret; 972 } 973 974 static int hellcreek_vlan_filtering(struct dsa_switch *ds, int port, 975 bool vlan_filtering, 976 struct netlink_ext_ack *extack) 977 { 978 struct hellcreek *hellcreek = ds->priv; 979 980 dev_dbg(hellcreek->dev, "%s VLAN filtering on port %d\n", 981 vlan_filtering ? "Enable" : "Disable", port); 982 983 /* Configure port to drop packages with not known vids */ 984 hellcreek_setup_ingressflt(hellcreek, port, vlan_filtering); 985 986 /* Enable VLAN awareness on the switch. This save due to 987 * ds->vlan_filtering_is_global. 988 */ 989 hellcreek_setup_vlan_awareness(hellcreek, vlan_filtering); 990 991 return 0; 992 } 993 994 static int hellcreek_enable_ip_core(struct hellcreek *hellcreek) 995 { 996 int ret; 997 u16 val; 998 999 mutex_lock(&hellcreek->reg_lock); 1000 1001 val = hellcreek_read(hellcreek, HR_CTRL_C); 1002 val |= HR_CTRL_C_ENABLE; 1003 hellcreek_write(hellcreek, val, HR_CTRL_C); 1004 ret = hellcreek_wait_until_transitioned(hellcreek); 1005 1006 mutex_unlock(&hellcreek->reg_lock); 1007 1008 return ret; 1009 } 1010 1011 static void hellcreek_setup_cpu_and_tunnel_port(struct hellcreek *hellcreek) 1012 { 1013 struct hellcreek_port *tunnel_port = &hellcreek->ports[TUNNEL_PORT]; 1014 struct hellcreek_port *cpu_port = &hellcreek->ports[CPU_PORT]; 1015 u16 ptcfg = 0; 1016 1017 ptcfg |= HR_PTCFG_LEARNING_EN | HR_PTCFG_ADMIN_EN; 1018 1019 mutex_lock(&hellcreek->reg_lock); 1020 1021 hellcreek_select_port(hellcreek, CPU_PORT); 1022 hellcreek_write(hellcreek, ptcfg, HR_PTCFG); 1023 1024 hellcreek_select_port(hellcreek, TUNNEL_PORT); 1025 hellcreek_write(hellcreek, ptcfg, HR_PTCFG); 1026 1027 cpu_port->ptcfg = ptcfg; 1028 tunnel_port->ptcfg = ptcfg; 1029 1030 mutex_unlock(&hellcreek->reg_lock); 1031 } 1032 1033 static void hellcreek_setup_tc_identity_mapping(struct hellcreek *hellcreek) 1034 { 1035 int i; 1036 1037 /* The switch has multiple egress queues per port. The queue is selected 1038 * via the PCP field in the VLAN header. The switch internally deals 1039 * with traffic classes instead of PCP values and this mapping is 1040 * configurable. 1041 * 1042 * The default mapping is (PCP - TC): 1043 * 7 - 7 1044 * 6 - 6 1045 * 5 - 5 1046 * 4 - 4 1047 * 3 - 3 1048 * 2 - 1 1049 * 1 - 0 1050 * 0 - 2 1051 * 1052 * The default should be an identity mapping. 1053 */ 1054 1055 for (i = 0; i < 8; ++i) { 1056 mutex_lock(&hellcreek->reg_lock); 1057 1058 hellcreek_select_prio(hellcreek, i); 1059 hellcreek_write(hellcreek, 1060 i << HR_PRTCCFG_PCP_TC_MAP_SHIFT, 1061 HR_PRTCCFG); 1062 1063 mutex_unlock(&hellcreek->reg_lock); 1064 } 1065 } 1066 1067 static int hellcreek_setup_fdb(struct hellcreek *hellcreek) 1068 { 1069 static struct hellcreek_fdb_entry l2_ptp = { 1070 /* MAC: 01-1B-19-00-00-00 */ 1071 .mac = { 0x01, 0x1b, 0x19, 0x00, 0x00, 0x00 }, 1072 .portmask = 0x03, /* Management ports */ 1073 .age = 0, 1074 .is_obt = 0, 1075 .pass_blocked = 0, 1076 .is_static = 1, 1077 .reprio_tc = 6, /* TC: 6 as per IEEE 802.1AS */ 1078 .reprio_en = 1, 1079 }; 1080 static struct hellcreek_fdb_entry udp4_ptp = { 1081 /* MAC: 01-00-5E-00-01-81 */ 1082 .mac = { 0x01, 0x00, 0x5e, 0x00, 0x01, 0x81 }, 1083 .portmask = 0x03, /* Management ports */ 1084 .age = 0, 1085 .is_obt = 0, 1086 .pass_blocked = 0, 1087 .is_static = 1, 1088 .reprio_tc = 6, 1089 .reprio_en = 1, 1090 }; 1091 static struct hellcreek_fdb_entry udp6_ptp = { 1092 /* MAC: 33-33-00-00-01-81 */ 1093 .mac = { 0x33, 0x33, 0x00, 0x00, 0x01, 0x81 }, 1094 .portmask = 0x03, /* Management ports */ 1095 .age = 0, 1096 .is_obt = 0, 1097 .pass_blocked = 0, 1098 .is_static = 1, 1099 .reprio_tc = 6, 1100 .reprio_en = 1, 1101 }; 1102 static struct hellcreek_fdb_entry l2_p2p = { 1103 /* MAC: 01-80-C2-00-00-0E */ 1104 .mac = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e }, 1105 .portmask = 0x03, /* Management ports */ 1106 .age = 0, 1107 .is_obt = 0, 1108 .pass_blocked = 1, 1109 .is_static = 1, 1110 .reprio_tc = 6, /* TC: 6 as per IEEE 802.1AS */ 1111 .reprio_en = 1, 1112 }; 1113 static struct hellcreek_fdb_entry udp4_p2p = { 1114 /* MAC: 01-00-5E-00-00-6B */ 1115 .mac = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x6b }, 1116 .portmask = 0x03, /* Management ports */ 1117 .age = 0, 1118 .is_obt = 0, 1119 .pass_blocked = 1, 1120 .is_static = 1, 1121 .reprio_tc = 6, 1122 .reprio_en = 1, 1123 }; 1124 static struct hellcreek_fdb_entry udp6_p2p = { 1125 /* MAC: 33-33-00-00-00-6B */ 1126 .mac = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x6b }, 1127 .portmask = 0x03, /* Management ports */ 1128 .age = 0, 1129 .is_obt = 0, 1130 .pass_blocked = 1, 1131 .is_static = 1, 1132 .reprio_tc = 6, 1133 .reprio_en = 1, 1134 }; 1135 static struct hellcreek_fdb_entry stp = { 1136 /* MAC: 01-80-C2-00-00-00 */ 1137 .mac = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 }, 1138 .portmask = 0x03, /* Management ports */ 1139 .age = 0, 1140 .is_obt = 0, 1141 .pass_blocked = 1, 1142 .is_static = 1, 1143 .reprio_tc = 6, 1144 .reprio_en = 1, 1145 }; 1146 int ret; 1147 1148 mutex_lock(&hellcreek->reg_lock); 1149 ret = __hellcreek_fdb_add(hellcreek, &l2_ptp); 1150 if (ret) 1151 goto out; 1152 ret = __hellcreek_fdb_add(hellcreek, &udp4_ptp); 1153 if (ret) 1154 goto out; 1155 ret = __hellcreek_fdb_add(hellcreek, &udp6_ptp); 1156 if (ret) 1157 goto out; 1158 ret = __hellcreek_fdb_add(hellcreek, &l2_p2p); 1159 if (ret) 1160 goto out; 1161 ret = __hellcreek_fdb_add(hellcreek, &udp4_p2p); 1162 if (ret) 1163 goto out; 1164 ret = __hellcreek_fdb_add(hellcreek, &udp6_p2p); 1165 if (ret) 1166 goto out; 1167 ret = __hellcreek_fdb_add(hellcreek, &stp); 1168 out: 1169 mutex_unlock(&hellcreek->reg_lock); 1170 1171 return ret; 1172 } 1173 1174 static int hellcreek_devlink_info_get(struct dsa_switch *ds, 1175 struct devlink_info_req *req, 1176 struct netlink_ext_ack *extack) 1177 { 1178 struct hellcreek *hellcreek = ds->priv; 1179 int ret; 1180 1181 ret = devlink_info_driver_name_put(req, "hellcreek"); 1182 if (ret) 1183 return ret; 1184 1185 return devlink_info_version_fixed_put(req, 1186 DEVLINK_INFO_VERSION_GENERIC_ASIC_ID, 1187 hellcreek->pdata->name); 1188 } 1189 1190 static u64 hellcreek_devlink_vlan_table_get(void *priv) 1191 { 1192 struct hellcreek *hellcreek = priv; 1193 u64 count = 0; 1194 int i; 1195 1196 mutex_lock(&hellcreek->reg_lock); 1197 for (i = 0; i < VLAN_N_VID; ++i) 1198 if (hellcreek->vidmbrcfg[i]) 1199 count++; 1200 mutex_unlock(&hellcreek->reg_lock); 1201 1202 return count; 1203 } 1204 1205 static u64 hellcreek_devlink_fdb_table_get(void *priv) 1206 { 1207 struct hellcreek *hellcreek = priv; 1208 u64 count = 0; 1209 1210 /* Reading this register has side effects. Synchronize against the other 1211 * FDB operations. 1212 */ 1213 mutex_lock(&hellcreek->reg_lock); 1214 count = hellcreek_read(hellcreek, HR_FDBMAX); 1215 mutex_unlock(&hellcreek->reg_lock); 1216 1217 return count; 1218 } 1219 1220 static int hellcreek_setup_devlink_resources(struct dsa_switch *ds) 1221 { 1222 struct devlink_resource_size_params size_vlan_params; 1223 struct devlink_resource_size_params size_fdb_params; 1224 struct hellcreek *hellcreek = ds->priv; 1225 int err; 1226 1227 devlink_resource_size_params_init(&size_vlan_params, VLAN_N_VID, 1228 VLAN_N_VID, 1229 1, DEVLINK_RESOURCE_UNIT_ENTRY); 1230 1231 devlink_resource_size_params_init(&size_fdb_params, 1232 hellcreek->fdb_entries, 1233 hellcreek->fdb_entries, 1234 1, DEVLINK_RESOURCE_UNIT_ENTRY); 1235 1236 err = dsa_devlink_resource_register(ds, "VLAN", VLAN_N_VID, 1237 HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE, 1238 DEVLINK_RESOURCE_ID_PARENT_TOP, 1239 &size_vlan_params); 1240 if (err) 1241 goto out; 1242 1243 err = dsa_devlink_resource_register(ds, "FDB", hellcreek->fdb_entries, 1244 HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE, 1245 DEVLINK_RESOURCE_ID_PARENT_TOP, 1246 &size_fdb_params); 1247 if (err) 1248 goto out; 1249 1250 dsa_devlink_resource_occ_get_register(ds, 1251 HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE, 1252 hellcreek_devlink_vlan_table_get, 1253 hellcreek); 1254 1255 dsa_devlink_resource_occ_get_register(ds, 1256 HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE, 1257 hellcreek_devlink_fdb_table_get, 1258 hellcreek); 1259 1260 return 0; 1261 1262 out: 1263 dsa_devlink_resources_unregister(ds); 1264 1265 return err; 1266 } 1267 1268 static int hellcreek_devlink_region_vlan_snapshot(struct devlink *dl, 1269 const struct devlink_region_ops *ops, 1270 struct netlink_ext_ack *extack, 1271 u8 **data) 1272 { 1273 struct hellcreek_devlink_vlan_entry *table, *entry; 1274 struct dsa_switch *ds = dsa_devlink_to_ds(dl); 1275 struct hellcreek *hellcreek = ds->priv; 1276 int i; 1277 1278 table = kcalloc(VLAN_N_VID, sizeof(*entry), GFP_KERNEL); 1279 if (!table) 1280 return -ENOMEM; 1281 1282 entry = table; 1283 1284 mutex_lock(&hellcreek->reg_lock); 1285 for (i = 0; i < VLAN_N_VID; ++i, ++entry) { 1286 entry->member = hellcreek->vidmbrcfg[i]; 1287 entry->vid = i; 1288 } 1289 mutex_unlock(&hellcreek->reg_lock); 1290 1291 *data = (u8 *)table; 1292 1293 return 0; 1294 } 1295 1296 static int hellcreek_devlink_region_fdb_snapshot(struct devlink *dl, 1297 const struct devlink_region_ops *ops, 1298 struct netlink_ext_ack *extack, 1299 u8 **data) 1300 { 1301 struct dsa_switch *ds = dsa_devlink_to_ds(dl); 1302 struct hellcreek_fdb_entry *table, *entry; 1303 struct hellcreek *hellcreek = ds->priv; 1304 size_t i; 1305 1306 table = kcalloc(hellcreek->fdb_entries, sizeof(*entry), GFP_KERNEL); 1307 if (!table) 1308 return -ENOMEM; 1309 1310 entry = table; 1311 1312 mutex_lock(&hellcreek->reg_lock); 1313 1314 /* Start table read */ 1315 hellcreek_read(hellcreek, HR_FDBMAX); 1316 hellcreek_write(hellcreek, 0x00, HR_FDBMAX); 1317 1318 for (i = 0; i < hellcreek->fdb_entries; ++i, ++entry) { 1319 /* Read current entry */ 1320 hellcreek_populate_fdb_entry(hellcreek, entry, i); 1321 1322 /* Advance read pointer */ 1323 hellcreek_write(hellcreek, 0x00, HR_FDBRDH); 1324 } 1325 1326 mutex_unlock(&hellcreek->reg_lock); 1327 1328 *data = (u8 *)table; 1329 1330 return 0; 1331 } 1332 1333 static struct devlink_region_ops hellcreek_region_vlan_ops = { 1334 .name = "vlan", 1335 .snapshot = hellcreek_devlink_region_vlan_snapshot, 1336 .destructor = kfree, 1337 }; 1338 1339 static struct devlink_region_ops hellcreek_region_fdb_ops = { 1340 .name = "fdb", 1341 .snapshot = hellcreek_devlink_region_fdb_snapshot, 1342 .destructor = kfree, 1343 }; 1344 1345 static int hellcreek_setup_devlink_regions(struct dsa_switch *ds) 1346 { 1347 struct hellcreek *hellcreek = ds->priv; 1348 struct devlink_region_ops *ops; 1349 struct devlink_region *region; 1350 u64 size; 1351 int ret; 1352 1353 /* VLAN table */ 1354 size = VLAN_N_VID * sizeof(struct hellcreek_devlink_vlan_entry); 1355 ops = &hellcreek_region_vlan_ops; 1356 1357 region = dsa_devlink_region_create(ds, ops, 1, size); 1358 if (IS_ERR(region)) 1359 return PTR_ERR(region); 1360 1361 hellcreek->vlan_region = region; 1362 1363 /* FDB table */ 1364 size = hellcreek->fdb_entries * sizeof(struct hellcreek_fdb_entry); 1365 ops = &hellcreek_region_fdb_ops; 1366 1367 region = dsa_devlink_region_create(ds, ops, 1, size); 1368 if (IS_ERR(region)) { 1369 ret = PTR_ERR(region); 1370 goto err_fdb; 1371 } 1372 1373 hellcreek->fdb_region = region; 1374 1375 return 0; 1376 1377 err_fdb: 1378 dsa_devlink_region_destroy(hellcreek->vlan_region); 1379 1380 return ret; 1381 } 1382 1383 static void hellcreek_teardown_devlink_regions(struct dsa_switch *ds) 1384 { 1385 struct hellcreek *hellcreek = ds->priv; 1386 1387 dsa_devlink_region_destroy(hellcreek->fdb_region); 1388 dsa_devlink_region_destroy(hellcreek->vlan_region); 1389 } 1390 1391 static int hellcreek_setup(struct dsa_switch *ds) 1392 { 1393 struct hellcreek *hellcreek = ds->priv; 1394 u16 swcfg = 0; 1395 int ret, i; 1396 1397 dev_dbg(hellcreek->dev, "Set up the switch\n"); 1398 1399 /* Let's go */ 1400 ret = hellcreek_enable_ip_core(hellcreek); 1401 if (ret) { 1402 dev_err(hellcreek->dev, "Failed to enable IP core!\n"); 1403 return ret; 1404 } 1405 1406 /* Enable CPU/Tunnel ports */ 1407 hellcreek_setup_cpu_and_tunnel_port(hellcreek); 1408 1409 /* Switch config: Keep defaults, enable FDB aging and learning and tag 1410 * each frame from/to cpu port for DSA tagging. Also enable the length 1411 * aware shaping mode. This eliminates the need for Qbv guard bands. 1412 */ 1413 swcfg |= HR_SWCFG_FDBAGE_EN | 1414 HR_SWCFG_FDBLRN_EN | 1415 HR_SWCFG_ALWAYS_OBT | 1416 (HR_SWCFG_LAS_ON << HR_SWCFG_LAS_MODE_SHIFT); 1417 hellcreek->swcfg = swcfg; 1418 hellcreek_write(hellcreek, swcfg, HR_SWCFG); 1419 1420 /* Initial vlan membership to reflect port separation */ 1421 for (i = 0; i < ds->num_ports; ++i) { 1422 if (!dsa_is_user_port(ds, i)) 1423 continue; 1424 1425 hellcreek_setup_vlan_membership(ds, i, true); 1426 } 1427 1428 /* Configure PCP <-> TC mapping */ 1429 hellcreek_setup_tc_identity_mapping(hellcreek); 1430 1431 /* The VLAN awareness is a global switch setting. Therefore, mixed vlan 1432 * filtering setups are not supported. 1433 */ 1434 ds->vlan_filtering_is_global = true; 1435 ds->needs_standalone_vlan_filtering = true; 1436 1437 /* Intercept _all_ PTP multicast traffic */ 1438 ret = hellcreek_setup_fdb(hellcreek); 1439 if (ret) { 1440 dev_err(hellcreek->dev, 1441 "Failed to insert static PTP FDB entries\n"); 1442 return ret; 1443 } 1444 1445 /* Register devlink resources with DSA */ 1446 ret = hellcreek_setup_devlink_resources(ds); 1447 if (ret) { 1448 dev_err(hellcreek->dev, 1449 "Failed to setup devlink resources!\n"); 1450 return ret; 1451 } 1452 1453 ret = hellcreek_setup_devlink_regions(ds); 1454 if (ret) { 1455 dev_err(hellcreek->dev, 1456 "Failed to setup devlink regions!\n"); 1457 goto err_regions; 1458 } 1459 1460 return 0; 1461 1462 err_regions: 1463 dsa_devlink_resources_unregister(ds); 1464 1465 return ret; 1466 } 1467 1468 static void hellcreek_teardown(struct dsa_switch *ds) 1469 { 1470 hellcreek_teardown_devlink_regions(ds); 1471 dsa_devlink_resources_unregister(ds); 1472 } 1473 1474 static void hellcreek_phylink_get_caps(struct dsa_switch *ds, int port, 1475 struct phylink_config *config) 1476 { 1477 struct hellcreek *hellcreek = ds->priv; 1478 1479 __set_bit(PHY_INTERFACE_MODE_MII, config->supported_interfaces); 1480 __set_bit(PHY_INTERFACE_MODE_RGMII, config->supported_interfaces); 1481 1482 /* Include GMII - the hardware does not support this interface 1483 * mode, but it's the default interface mode for phylib, so we 1484 * need it for compatibility with existing DT. 1485 */ 1486 __set_bit(PHY_INTERFACE_MODE_GMII, config->supported_interfaces); 1487 1488 /* The MAC settings are a hardware configuration option and cannot be 1489 * changed at run time or by strapping. Therefore the attached PHYs 1490 * should be programmed to only advertise settings which are supported 1491 * by the hardware. 1492 */ 1493 if (hellcreek->pdata->is_100_mbits) 1494 config->mac_capabilities = MAC_100FD; 1495 else 1496 config->mac_capabilities = MAC_1000FD; 1497 } 1498 1499 static int 1500 hellcreek_port_prechangeupper(struct dsa_switch *ds, int port, 1501 struct netdev_notifier_changeupper_info *info) 1502 { 1503 struct hellcreek *hellcreek = ds->priv; 1504 bool used = true; 1505 int ret = -EBUSY; 1506 u16 vid; 1507 int i; 1508 1509 dev_dbg(hellcreek->dev, "Pre change upper for port %d\n", port); 1510 1511 /* 1512 * Deny VLAN devices on top of lan ports with the same VLAN ids, because 1513 * it breaks the port separation due to the private VLANs. Example: 1514 * 1515 * lan0.100 *and* lan1.100 cannot be used in parallel. However, lan0.99 1516 * and lan1.100 works. 1517 */ 1518 1519 if (!is_vlan_dev(info->upper_dev)) 1520 return 0; 1521 1522 vid = vlan_dev_vlan_id(info->upper_dev); 1523 1524 /* For all ports, check bitmaps */ 1525 mutex_lock(&hellcreek->vlan_lock); 1526 for (i = 0; i < hellcreek->pdata->num_ports; ++i) { 1527 if (!dsa_is_user_port(ds, i)) 1528 continue; 1529 1530 if (port == i) 1531 continue; 1532 1533 used = used && test_bit(vid, hellcreek->ports[i].vlan_dev_bitmap); 1534 } 1535 1536 if (used) 1537 goto out; 1538 1539 /* Update bitmap */ 1540 set_bit(vid, hellcreek->ports[port].vlan_dev_bitmap); 1541 1542 ret = 0; 1543 1544 out: 1545 mutex_unlock(&hellcreek->vlan_lock); 1546 1547 return ret; 1548 } 1549 1550 static void hellcreek_setup_maxsdu(struct hellcreek *hellcreek, int port, 1551 const struct tc_taprio_qopt_offload *schedule) 1552 { 1553 int tc; 1554 1555 for (tc = 0; tc < 8; ++tc) { 1556 u32 max_sdu = schedule->max_sdu[tc] + VLAN_ETH_HLEN - ETH_FCS_LEN; 1557 u16 val; 1558 1559 if (!schedule->max_sdu[tc]) 1560 continue; 1561 1562 dev_dbg(hellcreek->dev, "Configure max-sdu %u for tc %d on port %d\n", 1563 max_sdu, tc, port); 1564 1565 hellcreek_select_port_prio(hellcreek, port, tc); 1566 1567 val = (max_sdu & HR_PTPRTCCFG_MAXSDU_MASK) << HR_PTPRTCCFG_MAXSDU_SHIFT; 1568 1569 hellcreek_write(hellcreek, val, HR_PTPRTCCFG); 1570 } 1571 } 1572 1573 static void hellcreek_reset_maxsdu(struct hellcreek *hellcreek, int port) 1574 { 1575 int tc; 1576 1577 for (tc = 0; tc < 8; ++tc) { 1578 u16 val; 1579 1580 hellcreek_select_port_prio(hellcreek, port, tc); 1581 1582 val = (HELLCREEK_DEFAULT_MAX_SDU & HR_PTPRTCCFG_MAXSDU_MASK) 1583 << HR_PTPRTCCFG_MAXSDU_SHIFT; 1584 1585 hellcreek_write(hellcreek, val, HR_PTPRTCCFG); 1586 } 1587 } 1588 1589 static void hellcreek_setup_gcl(struct hellcreek *hellcreek, int port, 1590 const struct tc_taprio_qopt_offload *schedule) 1591 { 1592 const struct tc_taprio_sched_entry *cur, *initial, *next; 1593 size_t i; 1594 1595 cur = initial = &schedule->entries[0]; 1596 next = cur + 1; 1597 1598 for (i = 1; i <= schedule->num_entries; ++i) { 1599 u16 data; 1600 u8 gates; 1601 1602 if (i == schedule->num_entries) 1603 gates = initial->gate_mask ^ 1604 cur->gate_mask; 1605 else 1606 gates = next->gate_mask ^ 1607 cur->gate_mask; 1608 1609 data = gates; 1610 1611 if (i == schedule->num_entries) 1612 data |= TR_GCLDAT_GCLWRLAST; 1613 1614 /* Gates states */ 1615 hellcreek_write(hellcreek, data, TR_GCLDAT); 1616 1617 /* Time interval */ 1618 hellcreek_write(hellcreek, 1619 cur->interval & 0x0000ffff, 1620 TR_GCLTIL); 1621 hellcreek_write(hellcreek, 1622 (cur->interval & 0xffff0000) >> 16, 1623 TR_GCLTIH); 1624 1625 /* Commit entry */ 1626 data = ((i - 1) << TR_GCLCMD_GCLWRADR_SHIFT) | 1627 (initial->gate_mask << 1628 TR_GCLCMD_INIT_GATE_STATES_SHIFT); 1629 hellcreek_write(hellcreek, data, TR_GCLCMD); 1630 1631 cur++; 1632 next++; 1633 } 1634 } 1635 1636 static void hellcreek_set_cycle_time(struct hellcreek *hellcreek, 1637 const struct tc_taprio_qopt_offload *schedule) 1638 { 1639 u32 cycle_time = schedule->cycle_time; 1640 1641 hellcreek_write(hellcreek, cycle_time & 0x0000ffff, TR_CTWRL); 1642 hellcreek_write(hellcreek, (cycle_time & 0xffff0000) >> 16, TR_CTWRH); 1643 } 1644 1645 static void hellcreek_switch_schedule(struct hellcreek *hellcreek, 1646 ktime_t start_time) 1647 { 1648 struct timespec64 ts = ktime_to_timespec64(start_time); 1649 1650 /* Start schedule at this point of time */ 1651 hellcreek_write(hellcreek, ts.tv_nsec & 0x0000ffff, TR_ESTWRL); 1652 hellcreek_write(hellcreek, (ts.tv_nsec & 0xffff0000) >> 16, TR_ESTWRH); 1653 1654 /* Arm timer, set seconds and switch schedule */ 1655 hellcreek_write(hellcreek, TR_ESTCMD_ESTARM | TR_ESTCMD_ESTSWCFG | 1656 ((ts.tv_sec & TR_ESTCMD_ESTSEC_MASK) << 1657 TR_ESTCMD_ESTSEC_SHIFT), TR_ESTCMD); 1658 } 1659 1660 static bool hellcreek_schedule_startable(struct hellcreek *hellcreek, int port) 1661 { 1662 struct hellcreek_port *hellcreek_port = &hellcreek->ports[port]; 1663 s64 base_time_ns, current_ns; 1664 1665 /* The switch allows a schedule to be started only eight seconds within 1666 * the future. Therefore, check the current PTP time if the schedule is 1667 * startable or not. 1668 */ 1669 1670 /* Use the "cached" time. That should be alright, as it's updated quite 1671 * frequently in the PTP code. 1672 */ 1673 mutex_lock(&hellcreek->ptp_lock); 1674 current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts; 1675 mutex_unlock(&hellcreek->ptp_lock); 1676 1677 /* Calculate difference to admin base time */ 1678 base_time_ns = ktime_to_ns(hellcreek_port->current_schedule->base_time); 1679 1680 return base_time_ns - current_ns < (s64)4 * NSEC_PER_SEC; 1681 } 1682 1683 static void hellcreek_start_schedule(struct hellcreek *hellcreek, int port) 1684 { 1685 struct hellcreek_port *hellcreek_port = &hellcreek->ports[port]; 1686 ktime_t base_time, current_time; 1687 s64 current_ns; 1688 u32 cycle_time; 1689 1690 /* First select port */ 1691 hellcreek_select_tgd(hellcreek, port); 1692 1693 /* Forward base time into the future if needed */ 1694 mutex_lock(&hellcreek->ptp_lock); 1695 current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts; 1696 mutex_unlock(&hellcreek->ptp_lock); 1697 1698 current_time = ns_to_ktime(current_ns); 1699 base_time = hellcreek_port->current_schedule->base_time; 1700 cycle_time = hellcreek_port->current_schedule->cycle_time; 1701 1702 if (ktime_compare(current_time, base_time) > 0) { 1703 s64 n; 1704 1705 n = div64_s64(ktime_sub_ns(current_time, base_time), 1706 cycle_time); 1707 base_time = ktime_add_ns(base_time, (n + 1) * cycle_time); 1708 } 1709 1710 /* Set admin base time and switch schedule */ 1711 hellcreek_switch_schedule(hellcreek, base_time); 1712 1713 taprio_offload_free(hellcreek_port->current_schedule); 1714 hellcreek_port->current_schedule = NULL; 1715 1716 dev_dbg(hellcreek->dev, "Armed EST timer for port %d\n", 1717 hellcreek_port->port); 1718 } 1719 1720 static void hellcreek_check_schedule(struct work_struct *work) 1721 { 1722 struct delayed_work *dw = to_delayed_work(work); 1723 struct hellcreek_port *hellcreek_port; 1724 struct hellcreek *hellcreek; 1725 bool startable; 1726 1727 hellcreek_port = dw_to_hellcreek_port(dw); 1728 hellcreek = hellcreek_port->hellcreek; 1729 1730 mutex_lock(&hellcreek->reg_lock); 1731 1732 /* Check starting time */ 1733 startable = hellcreek_schedule_startable(hellcreek, 1734 hellcreek_port->port); 1735 if (startable) { 1736 hellcreek_start_schedule(hellcreek, hellcreek_port->port); 1737 mutex_unlock(&hellcreek->reg_lock); 1738 return; 1739 } 1740 1741 mutex_unlock(&hellcreek->reg_lock); 1742 1743 /* Reschedule */ 1744 schedule_delayed_work(&hellcreek_port->schedule_work, 1745 HELLCREEK_SCHEDULE_PERIOD); 1746 } 1747 1748 static int hellcreek_port_set_schedule(struct dsa_switch *ds, int port, 1749 struct tc_taprio_qopt_offload *taprio) 1750 { 1751 struct hellcreek *hellcreek = ds->priv; 1752 struct hellcreek_port *hellcreek_port; 1753 bool startable; 1754 u16 ctrl; 1755 1756 hellcreek_port = &hellcreek->ports[port]; 1757 1758 dev_dbg(hellcreek->dev, "Configure traffic schedule on port %d\n", 1759 port); 1760 1761 /* First cancel delayed work */ 1762 cancel_delayed_work_sync(&hellcreek_port->schedule_work); 1763 1764 mutex_lock(&hellcreek->reg_lock); 1765 1766 if (hellcreek_port->current_schedule) { 1767 taprio_offload_free(hellcreek_port->current_schedule); 1768 hellcreek_port->current_schedule = NULL; 1769 } 1770 hellcreek_port->current_schedule = taprio_offload_get(taprio); 1771 1772 /* Configure max sdu */ 1773 hellcreek_setup_maxsdu(hellcreek, port, hellcreek_port->current_schedule); 1774 1775 /* Select tdg */ 1776 hellcreek_select_tgd(hellcreek, port); 1777 1778 /* Enable gating and keep defaults */ 1779 ctrl = (0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT) | TR_TGDCTRL_GATE_EN; 1780 hellcreek_write(hellcreek, ctrl, TR_TGDCTRL); 1781 1782 /* Cancel pending schedule */ 1783 hellcreek_write(hellcreek, 0x00, TR_ESTCMD); 1784 1785 /* Setup a new schedule */ 1786 hellcreek_setup_gcl(hellcreek, port, hellcreek_port->current_schedule); 1787 1788 /* Configure cycle time */ 1789 hellcreek_set_cycle_time(hellcreek, hellcreek_port->current_schedule); 1790 1791 /* Check starting time */ 1792 startable = hellcreek_schedule_startable(hellcreek, port); 1793 if (startable) { 1794 hellcreek_start_schedule(hellcreek, port); 1795 mutex_unlock(&hellcreek->reg_lock); 1796 return 0; 1797 } 1798 1799 mutex_unlock(&hellcreek->reg_lock); 1800 1801 /* Schedule periodic schedule check */ 1802 schedule_delayed_work(&hellcreek_port->schedule_work, 1803 HELLCREEK_SCHEDULE_PERIOD); 1804 1805 return 0; 1806 } 1807 1808 static int hellcreek_port_del_schedule(struct dsa_switch *ds, int port) 1809 { 1810 struct hellcreek *hellcreek = ds->priv; 1811 struct hellcreek_port *hellcreek_port; 1812 1813 hellcreek_port = &hellcreek->ports[port]; 1814 1815 dev_dbg(hellcreek->dev, "Remove traffic schedule on port %d\n", port); 1816 1817 /* First cancel delayed work */ 1818 cancel_delayed_work_sync(&hellcreek_port->schedule_work); 1819 1820 mutex_lock(&hellcreek->reg_lock); 1821 1822 if (hellcreek_port->current_schedule) { 1823 taprio_offload_free(hellcreek_port->current_schedule); 1824 hellcreek_port->current_schedule = NULL; 1825 } 1826 1827 /* Reset max sdu */ 1828 hellcreek_reset_maxsdu(hellcreek, port); 1829 1830 /* Select tgd */ 1831 hellcreek_select_tgd(hellcreek, port); 1832 1833 /* Disable gating and return to regular switching flow */ 1834 hellcreek_write(hellcreek, 0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT, 1835 TR_TGDCTRL); 1836 1837 mutex_unlock(&hellcreek->reg_lock); 1838 1839 return 0; 1840 } 1841 1842 static bool hellcreek_validate_schedule(struct hellcreek *hellcreek, 1843 struct tc_taprio_qopt_offload *schedule) 1844 { 1845 size_t i; 1846 1847 /* Does this hellcreek version support Qbv in hardware? */ 1848 if (!hellcreek->pdata->qbv_support) 1849 return false; 1850 1851 /* cycle time can only be 32bit */ 1852 if (schedule->cycle_time > (u32)-1) 1853 return false; 1854 1855 /* cycle time extension is not supported */ 1856 if (schedule->cycle_time_extension) 1857 return false; 1858 1859 /* Only set command is supported */ 1860 for (i = 0; i < schedule->num_entries; ++i) 1861 if (schedule->entries[i].command != TC_TAPRIO_CMD_SET_GATES) 1862 return false; 1863 1864 return true; 1865 } 1866 1867 static int hellcreek_tc_query_caps(struct tc_query_caps_base *base) 1868 { 1869 switch (base->type) { 1870 case TC_SETUP_QDISC_TAPRIO: { 1871 struct tc_taprio_caps *caps = base->caps; 1872 1873 caps->supports_queue_max_sdu = true; 1874 1875 return 0; 1876 } 1877 default: 1878 return -EOPNOTSUPP; 1879 } 1880 } 1881 1882 static int hellcreek_port_setup_tc(struct dsa_switch *ds, int port, 1883 enum tc_setup_type type, void *type_data) 1884 { 1885 struct hellcreek *hellcreek = ds->priv; 1886 1887 switch (type) { 1888 case TC_QUERY_CAPS: 1889 return hellcreek_tc_query_caps(type_data); 1890 case TC_SETUP_QDISC_TAPRIO: { 1891 struct tc_taprio_qopt_offload *taprio = type_data; 1892 1893 if (!hellcreek_validate_schedule(hellcreek, taprio)) 1894 return -EOPNOTSUPP; 1895 1896 if (taprio->enable) 1897 return hellcreek_port_set_schedule(ds, port, taprio); 1898 1899 return hellcreek_port_del_schedule(ds, port); 1900 } 1901 default: 1902 return -EOPNOTSUPP; 1903 } 1904 } 1905 1906 static const struct dsa_switch_ops hellcreek_ds_ops = { 1907 .devlink_info_get = hellcreek_devlink_info_get, 1908 .get_ethtool_stats = hellcreek_get_ethtool_stats, 1909 .get_sset_count = hellcreek_get_sset_count, 1910 .get_strings = hellcreek_get_strings, 1911 .get_tag_protocol = hellcreek_get_tag_protocol, 1912 .get_ts_info = hellcreek_get_ts_info, 1913 .phylink_get_caps = hellcreek_phylink_get_caps, 1914 .port_bridge_flags = hellcreek_bridge_flags, 1915 .port_bridge_join = hellcreek_port_bridge_join, 1916 .port_bridge_leave = hellcreek_port_bridge_leave, 1917 .port_disable = hellcreek_port_disable, 1918 .port_enable = hellcreek_port_enable, 1919 .port_fdb_add = hellcreek_fdb_add, 1920 .port_fdb_del = hellcreek_fdb_del, 1921 .port_fdb_dump = hellcreek_fdb_dump, 1922 .port_hwtstamp_set = hellcreek_port_hwtstamp_set, 1923 .port_hwtstamp_get = hellcreek_port_hwtstamp_get, 1924 .port_pre_bridge_flags = hellcreek_pre_bridge_flags, 1925 .port_prechangeupper = hellcreek_port_prechangeupper, 1926 .port_rxtstamp = hellcreek_port_rxtstamp, 1927 .port_setup_tc = hellcreek_port_setup_tc, 1928 .port_stp_state_set = hellcreek_port_stp_state_set, 1929 .port_txtstamp = hellcreek_port_txtstamp, 1930 .port_vlan_add = hellcreek_vlan_add, 1931 .port_vlan_del = hellcreek_vlan_del, 1932 .port_vlan_filtering = hellcreek_vlan_filtering, 1933 .setup = hellcreek_setup, 1934 .teardown = hellcreek_teardown, 1935 }; 1936 1937 static int hellcreek_probe(struct platform_device *pdev) 1938 { 1939 struct device *dev = &pdev->dev; 1940 struct hellcreek *hellcreek; 1941 struct resource *res; 1942 int ret, i; 1943 1944 hellcreek = devm_kzalloc(dev, sizeof(*hellcreek), GFP_KERNEL); 1945 if (!hellcreek) 1946 return -ENOMEM; 1947 1948 hellcreek->vidmbrcfg = devm_kcalloc(dev, VLAN_N_VID, 1949 sizeof(*hellcreek->vidmbrcfg), 1950 GFP_KERNEL); 1951 if (!hellcreek->vidmbrcfg) 1952 return -ENOMEM; 1953 1954 hellcreek->pdata = of_device_get_match_data(dev); 1955 1956 hellcreek->ports = devm_kcalloc(dev, hellcreek->pdata->num_ports, 1957 sizeof(*hellcreek->ports), 1958 GFP_KERNEL); 1959 if (!hellcreek->ports) 1960 return -ENOMEM; 1961 1962 for (i = 0; i < hellcreek->pdata->num_ports; ++i) { 1963 struct hellcreek_port *port = &hellcreek->ports[i]; 1964 1965 port->counter_values = 1966 devm_kcalloc(dev, 1967 ARRAY_SIZE(hellcreek_counter), 1968 sizeof(*port->counter_values), 1969 GFP_KERNEL); 1970 if (!port->counter_values) 1971 return -ENOMEM; 1972 1973 port->vlan_dev_bitmap = devm_bitmap_zalloc(dev, VLAN_N_VID, 1974 GFP_KERNEL); 1975 if (!port->vlan_dev_bitmap) 1976 return -ENOMEM; 1977 1978 port->hellcreek = hellcreek; 1979 port->port = i; 1980 1981 INIT_DELAYED_WORK(&port->schedule_work, 1982 hellcreek_check_schedule); 1983 } 1984 1985 mutex_init(&hellcreek->reg_lock); 1986 mutex_init(&hellcreek->vlan_lock); 1987 mutex_init(&hellcreek->ptp_lock); 1988 1989 hellcreek->dev = dev; 1990 1991 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tsn"); 1992 if (!res) { 1993 dev_err(dev, "No memory region provided!\n"); 1994 return -ENODEV; 1995 } 1996 1997 hellcreek->base = devm_ioremap_resource(dev, res); 1998 if (IS_ERR(hellcreek->base)) 1999 return PTR_ERR(hellcreek->base); 2000 2001 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ptp"); 2002 if (!res) { 2003 dev_err(dev, "No PTP memory region provided!\n"); 2004 return -ENODEV; 2005 } 2006 2007 hellcreek->ptp_base = devm_ioremap_resource(dev, res); 2008 if (IS_ERR(hellcreek->ptp_base)) 2009 return PTR_ERR(hellcreek->ptp_base); 2010 2011 ret = hellcreek_detect(hellcreek); 2012 if (ret) { 2013 dev_err(dev, "No (known) chip found!\n"); 2014 return ret; 2015 } 2016 2017 ret = hellcreek_wait_until_ready(hellcreek); 2018 if (ret) { 2019 dev_err(dev, "Switch didn't become ready!\n"); 2020 return ret; 2021 } 2022 2023 hellcreek_feature_detect(hellcreek); 2024 2025 hellcreek->ds = devm_kzalloc(dev, sizeof(*hellcreek->ds), GFP_KERNEL); 2026 if (!hellcreek->ds) 2027 return -ENOMEM; 2028 2029 hellcreek->ds->dev = dev; 2030 hellcreek->ds->priv = hellcreek; 2031 hellcreek->ds->ops = &hellcreek_ds_ops; 2032 hellcreek->ds->num_ports = hellcreek->pdata->num_ports; 2033 hellcreek->ds->num_tx_queues = HELLCREEK_NUM_EGRESS_QUEUES; 2034 2035 ret = dsa_register_switch(hellcreek->ds); 2036 if (ret) { 2037 dev_err_probe(dev, ret, "Unable to register switch\n"); 2038 return ret; 2039 } 2040 2041 ret = hellcreek_ptp_setup(hellcreek); 2042 if (ret) { 2043 dev_err(dev, "Failed to setup PTP!\n"); 2044 goto err_ptp_setup; 2045 } 2046 2047 ret = hellcreek_hwtstamp_setup(hellcreek); 2048 if (ret) { 2049 dev_err(dev, "Failed to setup hardware timestamping!\n"); 2050 goto err_tstamp_setup; 2051 } 2052 2053 platform_set_drvdata(pdev, hellcreek); 2054 2055 return 0; 2056 2057 err_tstamp_setup: 2058 hellcreek_ptp_free(hellcreek); 2059 err_ptp_setup: 2060 dsa_unregister_switch(hellcreek->ds); 2061 2062 return ret; 2063 } 2064 2065 static int hellcreek_remove(struct platform_device *pdev) 2066 { 2067 struct hellcreek *hellcreek = platform_get_drvdata(pdev); 2068 2069 if (!hellcreek) 2070 return 0; 2071 2072 hellcreek_hwtstamp_free(hellcreek); 2073 hellcreek_ptp_free(hellcreek); 2074 dsa_unregister_switch(hellcreek->ds); 2075 2076 return 0; 2077 } 2078 2079 static void hellcreek_shutdown(struct platform_device *pdev) 2080 { 2081 struct hellcreek *hellcreek = platform_get_drvdata(pdev); 2082 2083 if (!hellcreek) 2084 return; 2085 2086 dsa_switch_shutdown(hellcreek->ds); 2087 2088 platform_set_drvdata(pdev, NULL); 2089 } 2090 2091 static const struct hellcreek_platform_data de1soc_r1_pdata = { 2092 .name = "r4c30", 2093 .num_ports = 4, 2094 .is_100_mbits = 1, 2095 .qbv_support = 1, 2096 .qbv_on_cpu_port = 1, 2097 .qbu_support = 0, 2098 .module_id = 0x4c30, 2099 }; 2100 2101 static const struct of_device_id hellcreek_of_match[] = { 2102 { 2103 .compatible = "hirschmann,hellcreek-de1soc-r1", 2104 .data = &de1soc_r1_pdata, 2105 }, 2106 { /* sentinel */ }, 2107 }; 2108 MODULE_DEVICE_TABLE(of, hellcreek_of_match); 2109 2110 static struct platform_driver hellcreek_driver = { 2111 .probe = hellcreek_probe, 2112 .remove = hellcreek_remove, 2113 .shutdown = hellcreek_shutdown, 2114 .driver = { 2115 .name = "hellcreek", 2116 .of_match_table = hellcreek_of_match, 2117 }, 2118 }; 2119 module_platform_driver(hellcreek_driver); 2120 2121 MODULE_AUTHOR("Kurt Kanzenbach <kurt@linutronix.de>"); 2122 MODULE_DESCRIPTION("Hirschmann Hellcreek driver"); 2123 MODULE_LICENSE("Dual MIT/GPL"); 2124