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