1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2020 NovaTech LLC 4 * George McCollister <george.mccollister@gmail.com> 5 */ 6 7 #include <net/dsa.h> 8 #include <linux/etherdevice.h> 9 #include <linux/if_bridge.h> 10 #include <linux/of.h> 11 #include <linux/netdev_features.h> 12 #include <linux/if_hsr.h> 13 #include "xrs700x.h" 14 #include "xrs700x_reg.h" 15 16 #define XRS700X_MIB_INTERVAL msecs_to_jiffies(3000) 17 18 #define XRS7000X_SUPPORTED_HSR_FEATURES \ 19 (NETIF_F_HW_HSR_TAG_INS | NETIF_F_HW_HSR_TAG_RM | \ 20 NETIF_F_HW_HSR_FWD | NETIF_F_HW_HSR_DUP) 21 22 #define XRS7003E_ID 0x100 23 #define XRS7003F_ID 0x101 24 #define XRS7004E_ID 0x200 25 #define XRS7004F_ID 0x201 26 27 const struct xrs700x_info xrs7003e_info = {XRS7003E_ID, "XRS7003E", 3}; 28 EXPORT_SYMBOL(xrs7003e_info); 29 30 const struct xrs700x_info xrs7003f_info = {XRS7003F_ID, "XRS7003F", 3}; 31 EXPORT_SYMBOL(xrs7003f_info); 32 33 const struct xrs700x_info xrs7004e_info = {XRS7004E_ID, "XRS7004E", 4}; 34 EXPORT_SYMBOL(xrs7004e_info); 35 36 const struct xrs700x_info xrs7004f_info = {XRS7004F_ID, "XRS7004F", 4}; 37 EXPORT_SYMBOL(xrs7004f_info); 38 39 struct xrs700x_regfield { 40 struct reg_field rf; 41 struct regmap_field **rmf; 42 }; 43 44 struct xrs700x_mib { 45 unsigned int offset; 46 const char *name; 47 int stats64_offset; 48 }; 49 50 #define XRS700X_MIB_ETHTOOL_ONLY(o, n) {o, n, -1} 51 #define XRS700X_MIB(o, n, m) {o, n, offsetof(struct rtnl_link_stats64, m)} 52 53 static const struct xrs700x_mib xrs700x_mibs[] = { 54 XRS700X_MIB(XRS_RX_GOOD_OCTETS_L, "rx_good_octets", rx_bytes), 55 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_BAD_OCTETS_L, "rx_bad_octets"), 56 XRS700X_MIB(XRS_RX_UNICAST_L, "rx_unicast", rx_packets), 57 XRS700X_MIB(XRS_RX_BROADCAST_L, "rx_broadcast", rx_packets), 58 XRS700X_MIB(XRS_RX_MULTICAST_L, "rx_multicast", multicast), 59 XRS700X_MIB(XRS_RX_UNDERSIZE_L, "rx_undersize", rx_length_errors), 60 XRS700X_MIB(XRS_RX_FRAGMENTS_L, "rx_fragments", rx_length_errors), 61 XRS700X_MIB(XRS_RX_OVERSIZE_L, "rx_oversize", rx_length_errors), 62 XRS700X_MIB(XRS_RX_JABBER_L, "rx_jabber", rx_length_errors), 63 XRS700X_MIB(XRS_RX_ERR_L, "rx_err", rx_errors), 64 XRS700X_MIB(XRS_RX_CRC_L, "rx_crc", rx_crc_errors), 65 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_64_L, "rx_64"), 66 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_65_127_L, "rx_65_127"), 67 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_128_255_L, "rx_128_255"), 68 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_256_511_L, "rx_256_511"), 69 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_512_1023_L, "rx_512_1023"), 70 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_1024_1536_L, "rx_1024_1536"), 71 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_HSR_PRP_L, "rx_hsr_prp"), 72 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_WRONGLAN_L, "rx_wronglan"), 73 XRS700X_MIB_ETHTOOL_ONLY(XRS_RX_DUPLICATE_L, "rx_duplicate"), 74 XRS700X_MIB(XRS_TX_OCTETS_L, "tx_octets", tx_bytes), 75 XRS700X_MIB(XRS_TX_UNICAST_L, "tx_unicast", tx_packets), 76 XRS700X_MIB(XRS_TX_BROADCAST_L, "tx_broadcast", tx_packets), 77 XRS700X_MIB(XRS_TX_MULTICAST_L, "tx_multicast", tx_packets), 78 XRS700X_MIB_ETHTOOL_ONLY(XRS_TX_HSR_PRP_L, "tx_hsr_prp"), 79 XRS700X_MIB(XRS_PRIQ_DROP_L, "priq_drop", tx_dropped), 80 XRS700X_MIB(XRS_EARLY_DROP_L, "early_drop", tx_dropped), 81 }; 82 83 static const u8 eth_hsrsup_addr[ETH_ALEN] = { 84 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00}; 85 86 static void xrs700x_get_strings(struct dsa_switch *ds, int port, 87 u32 stringset, u8 *data) 88 { 89 int i; 90 91 if (stringset != ETH_SS_STATS) 92 return; 93 94 for (i = 0; i < ARRAY_SIZE(xrs700x_mibs); i++) { 95 strscpy(data, xrs700x_mibs[i].name, ETH_GSTRING_LEN); 96 data += ETH_GSTRING_LEN; 97 } 98 } 99 100 static int xrs700x_get_sset_count(struct dsa_switch *ds, int port, int sset) 101 { 102 if (sset != ETH_SS_STATS) 103 return -EOPNOTSUPP; 104 105 return ARRAY_SIZE(xrs700x_mibs); 106 } 107 108 static void xrs700x_read_port_counters(struct xrs700x *priv, int port) 109 { 110 struct xrs700x_port *p = &priv->ports[port]; 111 struct rtnl_link_stats64 stats; 112 unsigned long flags; 113 int i; 114 115 memset(&stats, 0, sizeof(stats)); 116 117 mutex_lock(&p->mib_mutex); 118 119 /* Capture counter values */ 120 regmap_write(priv->regmap, XRS_CNT_CTRL(port), 1); 121 122 for (i = 0; i < ARRAY_SIZE(xrs700x_mibs); i++) { 123 unsigned int high = 0, low = 0, reg; 124 125 reg = xrs700x_mibs[i].offset + XRS_PORT_OFFSET * port; 126 regmap_read(priv->regmap, reg, &low); 127 regmap_read(priv->regmap, reg + 2, &high); 128 129 p->mib_data[i] += (high << 16) | low; 130 131 if (xrs700x_mibs[i].stats64_offset >= 0) { 132 u8 *s = (u8 *)&stats + xrs700x_mibs[i].stats64_offset; 133 *(u64 *)s += p->mib_data[i]; 134 } 135 } 136 137 /* multicast must be added to rx_packets (which already includes 138 * unicast and broadcast) 139 */ 140 stats.rx_packets += stats.multicast; 141 142 flags = u64_stats_update_begin_irqsave(&p->syncp); 143 p->stats64 = stats; 144 u64_stats_update_end_irqrestore(&p->syncp, flags); 145 146 mutex_unlock(&p->mib_mutex); 147 } 148 149 static void xrs700x_mib_work(struct work_struct *work) 150 { 151 struct xrs700x *priv = container_of(work, struct xrs700x, 152 mib_work.work); 153 int i; 154 155 for (i = 0; i < priv->ds->num_ports; i++) 156 xrs700x_read_port_counters(priv, i); 157 158 schedule_delayed_work(&priv->mib_work, XRS700X_MIB_INTERVAL); 159 } 160 161 static void xrs700x_get_ethtool_stats(struct dsa_switch *ds, int port, 162 u64 *data) 163 { 164 struct xrs700x *priv = ds->priv; 165 struct xrs700x_port *p = &priv->ports[port]; 166 167 xrs700x_read_port_counters(priv, port); 168 169 mutex_lock(&p->mib_mutex); 170 memcpy(data, p->mib_data, sizeof(*data) * ARRAY_SIZE(xrs700x_mibs)); 171 mutex_unlock(&p->mib_mutex); 172 } 173 174 static void xrs700x_get_stats64(struct dsa_switch *ds, int port, 175 struct rtnl_link_stats64 *s) 176 { 177 struct xrs700x *priv = ds->priv; 178 struct xrs700x_port *p = &priv->ports[port]; 179 unsigned int start; 180 181 do { 182 start = u64_stats_fetch_begin(&p->syncp); 183 *s = p->stats64; 184 } while (u64_stats_fetch_retry(&p->syncp, start)); 185 } 186 187 static int xrs700x_setup_regmap_range(struct xrs700x *priv) 188 { 189 struct xrs700x_regfield regfields[] = { 190 { 191 .rf = REG_FIELD_ID(XRS_PORT_STATE(0), 0, 1, 192 priv->ds->num_ports, 193 XRS_PORT_OFFSET), 194 .rmf = &priv->ps_forward 195 }, 196 { 197 .rf = REG_FIELD_ID(XRS_PORT_STATE(0), 2, 3, 198 priv->ds->num_ports, 199 XRS_PORT_OFFSET), 200 .rmf = &priv->ps_management 201 }, 202 { 203 .rf = REG_FIELD_ID(XRS_PORT_STATE(0), 4, 9, 204 priv->ds->num_ports, 205 XRS_PORT_OFFSET), 206 .rmf = &priv->ps_sel_speed 207 }, 208 { 209 .rf = REG_FIELD_ID(XRS_PORT_STATE(0), 10, 11, 210 priv->ds->num_ports, 211 XRS_PORT_OFFSET), 212 .rmf = &priv->ps_cur_speed 213 } 214 }; 215 int i = 0; 216 217 for (; i < ARRAY_SIZE(regfields); i++) { 218 *regfields[i].rmf = devm_regmap_field_alloc(priv->dev, 219 priv->regmap, 220 regfields[i].rf); 221 if (IS_ERR(*regfields[i].rmf)) 222 return PTR_ERR(*regfields[i].rmf); 223 } 224 225 return 0; 226 } 227 228 static enum dsa_tag_protocol xrs700x_get_tag_protocol(struct dsa_switch *ds, 229 int port, 230 enum dsa_tag_protocol m) 231 { 232 return DSA_TAG_PROTO_XRS700X; 233 } 234 235 static int xrs700x_reset(struct dsa_switch *ds) 236 { 237 struct xrs700x *priv = ds->priv; 238 unsigned int val; 239 int ret; 240 241 ret = regmap_write(priv->regmap, XRS_GENERAL, XRS_GENERAL_RESET); 242 if (ret) 243 goto error; 244 245 ret = regmap_read_poll_timeout(priv->regmap, XRS_GENERAL, 246 val, !(val & XRS_GENERAL_RESET), 247 10, 1000); 248 error: 249 if (ret) { 250 dev_err_ratelimited(priv->dev, "error resetting switch: %d\n", 251 ret); 252 } 253 254 return ret; 255 } 256 257 static void xrs700x_port_stp_state_set(struct dsa_switch *ds, int port, 258 u8 state) 259 { 260 struct xrs700x *priv = ds->priv; 261 unsigned int bpdus = 1; 262 unsigned int val; 263 264 switch (state) { 265 case BR_STATE_DISABLED: 266 bpdus = 0; 267 fallthrough; 268 case BR_STATE_BLOCKING: 269 case BR_STATE_LISTENING: 270 val = XRS_PORT_DISABLED; 271 break; 272 case BR_STATE_LEARNING: 273 val = XRS_PORT_LEARNING; 274 break; 275 case BR_STATE_FORWARDING: 276 val = XRS_PORT_FORWARDING; 277 break; 278 default: 279 dev_err(ds->dev, "invalid STP state: %d\n", state); 280 return; 281 } 282 283 regmap_fields_write(priv->ps_forward, port, val); 284 285 /* Enable/disable inbound policy added by xrs700x_port_add_bpdu_ipf() 286 * which allows BPDU forwarding to the CPU port when the front facing 287 * port is in disabled/learning state. 288 */ 289 regmap_update_bits(priv->regmap, XRS_ETH_ADDR_CFG(port, 0), 1, bpdus); 290 291 dev_dbg_ratelimited(priv->dev, "%s - port: %d, state: %u, val: 0x%x\n", 292 __func__, port, state, val); 293 } 294 295 /* Add an inbound policy filter which matches the BPDU destination MAC 296 * and forwards to the CPU port. Leave the policy disabled, it will be 297 * enabled as needed. 298 */ 299 static int xrs700x_port_add_bpdu_ipf(struct dsa_switch *ds, int port) 300 { 301 struct xrs700x *priv = ds->priv; 302 unsigned int val = 0; 303 int i = 0; 304 int ret; 305 306 /* Compare all 48 bits of the destination MAC address. */ 307 ret = regmap_write(priv->regmap, XRS_ETH_ADDR_CFG(port, 0), 48 << 2); 308 if (ret) 309 return ret; 310 311 /* match BPDU destination 01:80:c2:00:00:00 */ 312 for (i = 0; i < sizeof(eth_stp_addr); i += 2) { 313 ret = regmap_write(priv->regmap, XRS_ETH_ADDR_0(port, 0) + i, 314 eth_stp_addr[i] | 315 (eth_stp_addr[i + 1] << 8)); 316 if (ret) 317 return ret; 318 } 319 320 /* Mirror BPDU to CPU port */ 321 for (i = 0; i < ds->num_ports; i++) { 322 if (dsa_is_cpu_port(ds, i)) 323 val |= BIT(i); 324 } 325 326 ret = regmap_write(priv->regmap, XRS_ETH_ADDR_FWD_MIRROR(port, 0), val); 327 if (ret) 328 return ret; 329 330 ret = regmap_write(priv->regmap, XRS_ETH_ADDR_FWD_ALLOW(port, 0), 0); 331 if (ret) 332 return ret; 333 334 return 0; 335 } 336 337 /* Add an inbound policy filter which matches the HSR/PRP supervision MAC 338 * range and forwards to the CPU port without discarding duplicates. 339 * This is required to correctly populate the HSR/PRP node_table. 340 * Leave the policy disabled, it will be enabled as needed. 341 */ 342 static int xrs700x_port_add_hsrsup_ipf(struct dsa_switch *ds, int port, 343 int fwdport) 344 { 345 struct xrs700x *priv = ds->priv; 346 unsigned int val = 0; 347 int i = 0; 348 int ret; 349 350 /* Compare 40 bits of the destination MAC address. */ 351 ret = regmap_write(priv->regmap, XRS_ETH_ADDR_CFG(port, 1), 40 << 2); 352 if (ret) 353 return ret; 354 355 /* match HSR/PRP supervision destination 01:15:4e:00:01:XX */ 356 for (i = 0; i < sizeof(eth_hsrsup_addr); i += 2) { 357 ret = regmap_write(priv->regmap, XRS_ETH_ADDR_0(port, 1) + i, 358 eth_hsrsup_addr[i] | 359 (eth_hsrsup_addr[i + 1] << 8)); 360 if (ret) 361 return ret; 362 } 363 364 /* Mirror HSR/PRP supervision to CPU port */ 365 for (i = 0; i < ds->num_ports; i++) { 366 if (dsa_is_cpu_port(ds, i)) 367 val |= BIT(i); 368 } 369 370 ret = regmap_write(priv->regmap, XRS_ETH_ADDR_FWD_MIRROR(port, 1), val); 371 if (ret) 372 return ret; 373 374 if (fwdport >= 0) 375 val |= BIT(fwdport); 376 377 /* Allow must be set prevent duplicate discard */ 378 ret = regmap_write(priv->regmap, XRS_ETH_ADDR_FWD_ALLOW(port, 1), val); 379 if (ret) 380 return ret; 381 382 return 0; 383 } 384 385 static int xrs700x_port_setup(struct dsa_switch *ds, int port) 386 { 387 bool cpu_port = dsa_is_cpu_port(ds, port); 388 struct xrs700x *priv = ds->priv; 389 unsigned int val = 0; 390 int ret, i; 391 392 xrs700x_port_stp_state_set(ds, port, BR_STATE_DISABLED); 393 394 /* Disable forwarding to non-CPU ports */ 395 for (i = 0; i < ds->num_ports; i++) { 396 if (!dsa_is_cpu_port(ds, i)) 397 val |= BIT(i); 398 } 399 400 /* 1 = Disable forwarding to the port */ 401 ret = regmap_write(priv->regmap, XRS_PORT_FWD_MASK(port), val); 402 if (ret) 403 return ret; 404 405 val = cpu_port ? XRS_PORT_MODE_MANAGEMENT : XRS_PORT_MODE_NORMAL; 406 ret = regmap_fields_write(priv->ps_management, port, val); 407 if (ret) 408 return ret; 409 410 if (!cpu_port) { 411 ret = xrs700x_port_add_bpdu_ipf(ds, port); 412 if (ret) 413 return ret; 414 } 415 416 return 0; 417 } 418 419 static int xrs700x_setup(struct dsa_switch *ds) 420 { 421 struct xrs700x *priv = ds->priv; 422 int ret, i; 423 424 ret = xrs700x_reset(ds); 425 if (ret) 426 return ret; 427 428 for (i = 0; i < ds->num_ports; i++) { 429 ret = xrs700x_port_setup(ds, i); 430 if (ret) 431 return ret; 432 } 433 434 schedule_delayed_work(&priv->mib_work, XRS700X_MIB_INTERVAL); 435 436 return 0; 437 } 438 439 static void xrs700x_teardown(struct dsa_switch *ds) 440 { 441 struct xrs700x *priv = ds->priv; 442 443 cancel_delayed_work_sync(&priv->mib_work); 444 } 445 446 static void xrs700x_phylink_get_caps(struct dsa_switch *ds, int port, 447 struct phylink_config *config) 448 { 449 switch (port) { 450 case 0: 451 __set_bit(PHY_INTERFACE_MODE_RMII, 452 config->supported_interfaces); 453 config->mac_capabilities = MAC_10FD | MAC_100FD; 454 break; 455 456 case 1: 457 case 2: 458 case 3: 459 phy_interface_set_rgmii(config->supported_interfaces); 460 config->mac_capabilities = MAC_10FD | MAC_100FD | MAC_1000FD; 461 break; 462 463 default: 464 dev_err(ds->dev, "Unsupported port: %i\n", port); 465 break; 466 } 467 } 468 469 static void xrs700x_mac_link_up(struct dsa_switch *ds, int port, 470 unsigned int mode, phy_interface_t interface, 471 struct phy_device *phydev, 472 int speed, int duplex, 473 bool tx_pause, bool rx_pause) 474 { 475 struct xrs700x *priv = ds->priv; 476 unsigned int val; 477 478 switch (speed) { 479 case SPEED_1000: 480 val = XRS_PORT_SPEED_1000; 481 break; 482 case SPEED_100: 483 val = XRS_PORT_SPEED_100; 484 break; 485 case SPEED_10: 486 val = XRS_PORT_SPEED_10; 487 break; 488 default: 489 return; 490 } 491 492 regmap_fields_write(priv->ps_sel_speed, port, val); 493 494 dev_dbg_ratelimited(priv->dev, "%s: port: %d mode: %u speed: %u\n", 495 __func__, port, mode, speed); 496 } 497 498 static int xrs700x_bridge_common(struct dsa_switch *ds, int port, 499 struct dsa_bridge bridge, bool join) 500 { 501 unsigned int i, cpu_mask = 0, mask = 0; 502 struct xrs700x *priv = ds->priv; 503 int ret; 504 505 for (i = 0; i < ds->num_ports; i++) { 506 if (dsa_is_cpu_port(ds, i)) 507 continue; 508 509 cpu_mask |= BIT(i); 510 511 if (dsa_port_offloads_bridge(dsa_to_port(ds, i), &bridge)) 512 continue; 513 514 mask |= BIT(i); 515 } 516 517 for (i = 0; i < ds->num_ports; i++) { 518 if (!dsa_port_offloads_bridge(dsa_to_port(ds, i), &bridge)) 519 continue; 520 521 /* 1 = Disable forwarding to the port */ 522 ret = regmap_write(priv->regmap, XRS_PORT_FWD_MASK(i), mask); 523 if (ret) 524 return ret; 525 } 526 527 if (!join) { 528 ret = regmap_write(priv->regmap, XRS_PORT_FWD_MASK(port), 529 cpu_mask); 530 if (ret) 531 return ret; 532 } 533 534 return 0; 535 } 536 537 static int xrs700x_bridge_join(struct dsa_switch *ds, int port, 538 struct dsa_bridge bridge, bool *tx_fwd_offload, 539 struct netlink_ext_ack *extack) 540 { 541 return xrs700x_bridge_common(ds, port, bridge, true); 542 } 543 544 static void xrs700x_bridge_leave(struct dsa_switch *ds, int port, 545 struct dsa_bridge bridge) 546 { 547 xrs700x_bridge_common(ds, port, bridge, false); 548 } 549 550 static int xrs700x_hsr_join(struct dsa_switch *ds, int port, 551 struct net_device *hsr) 552 { 553 unsigned int val = XRS_HSR_CFG_HSR_PRP; 554 struct dsa_port *partner = NULL, *dp; 555 struct xrs700x *priv = ds->priv; 556 struct net_device *slave; 557 int ret, i, hsr_pair[2]; 558 enum hsr_version ver; 559 bool fwd = false; 560 561 ret = hsr_get_version(hsr, &ver); 562 if (ret) 563 return ret; 564 565 /* Only ports 1 and 2 can be HSR/PRP redundant ports. */ 566 if (port != 1 && port != 2) 567 return -EOPNOTSUPP; 568 569 if (ver == HSR_V1) 570 val |= XRS_HSR_CFG_HSR; 571 else if (ver == PRP_V1) 572 val |= XRS_HSR_CFG_PRP; 573 else 574 return -EOPNOTSUPP; 575 576 dsa_hsr_foreach_port(dp, ds, hsr) { 577 if (dp->index != port) { 578 partner = dp; 579 break; 580 } 581 } 582 583 /* We can't enable redundancy on the switch until both 584 * redundant ports have signed up. 585 */ 586 if (!partner) 587 return 0; 588 589 regmap_fields_write(priv->ps_forward, partner->index, 590 XRS_PORT_DISABLED); 591 regmap_fields_write(priv->ps_forward, port, XRS_PORT_DISABLED); 592 593 regmap_write(priv->regmap, XRS_HSR_CFG(partner->index), 594 val | XRS_HSR_CFG_LANID_A); 595 regmap_write(priv->regmap, XRS_HSR_CFG(port), 596 val | XRS_HSR_CFG_LANID_B); 597 598 /* Clear bits for both redundant ports (HSR only) and the CPU port to 599 * enable forwarding. 600 */ 601 val = GENMASK(ds->num_ports - 1, 0); 602 if (ver == HSR_V1) { 603 val &= ~BIT(partner->index); 604 val &= ~BIT(port); 605 fwd = true; 606 } 607 val &= ~BIT(dsa_upstream_port(ds, port)); 608 regmap_write(priv->regmap, XRS_PORT_FWD_MASK(partner->index), val); 609 regmap_write(priv->regmap, XRS_PORT_FWD_MASK(port), val); 610 611 regmap_fields_write(priv->ps_forward, partner->index, 612 XRS_PORT_FORWARDING); 613 regmap_fields_write(priv->ps_forward, port, XRS_PORT_FORWARDING); 614 615 /* Enable inbound policy which allows HSR/PRP supervision forwarding 616 * to the CPU port without discarding duplicates. Continue to 617 * forward to redundant ports when in HSR mode while discarding 618 * duplicates. 619 */ 620 ret = xrs700x_port_add_hsrsup_ipf(ds, partner->index, fwd ? port : -1); 621 if (ret) 622 return ret; 623 624 ret = xrs700x_port_add_hsrsup_ipf(ds, port, fwd ? partner->index : -1); 625 if (ret) 626 return ret; 627 628 regmap_update_bits(priv->regmap, 629 XRS_ETH_ADDR_CFG(partner->index, 1), 1, 1); 630 regmap_update_bits(priv->regmap, XRS_ETH_ADDR_CFG(port, 1), 1, 1); 631 632 hsr_pair[0] = port; 633 hsr_pair[1] = partner->index; 634 for (i = 0; i < ARRAY_SIZE(hsr_pair); i++) { 635 slave = dsa_to_port(ds, hsr_pair[i])->slave; 636 slave->features |= XRS7000X_SUPPORTED_HSR_FEATURES; 637 } 638 639 return 0; 640 } 641 642 static int xrs700x_hsr_leave(struct dsa_switch *ds, int port, 643 struct net_device *hsr) 644 { 645 struct dsa_port *partner = NULL, *dp; 646 struct xrs700x *priv = ds->priv; 647 struct net_device *slave; 648 int i, hsr_pair[2]; 649 unsigned int val; 650 651 dsa_hsr_foreach_port(dp, ds, hsr) { 652 if (dp->index != port) { 653 partner = dp; 654 break; 655 } 656 } 657 658 if (!partner) 659 return 0; 660 661 regmap_fields_write(priv->ps_forward, partner->index, 662 XRS_PORT_DISABLED); 663 regmap_fields_write(priv->ps_forward, port, XRS_PORT_DISABLED); 664 665 regmap_write(priv->regmap, XRS_HSR_CFG(partner->index), 0); 666 regmap_write(priv->regmap, XRS_HSR_CFG(port), 0); 667 668 /* Clear bit for the CPU port to enable forwarding. */ 669 val = GENMASK(ds->num_ports - 1, 0); 670 val &= ~BIT(dsa_upstream_port(ds, port)); 671 regmap_write(priv->regmap, XRS_PORT_FWD_MASK(partner->index), val); 672 regmap_write(priv->regmap, XRS_PORT_FWD_MASK(port), val); 673 674 regmap_fields_write(priv->ps_forward, partner->index, 675 XRS_PORT_FORWARDING); 676 regmap_fields_write(priv->ps_forward, port, XRS_PORT_FORWARDING); 677 678 /* Disable inbound policy added by xrs700x_port_add_hsrsup_ipf() 679 * which allows HSR/PRP supervision forwarding to the CPU port without 680 * discarding duplicates. 681 */ 682 regmap_update_bits(priv->regmap, 683 XRS_ETH_ADDR_CFG(partner->index, 1), 1, 0); 684 regmap_update_bits(priv->regmap, XRS_ETH_ADDR_CFG(port, 1), 1, 0); 685 686 hsr_pair[0] = port; 687 hsr_pair[1] = partner->index; 688 for (i = 0; i < ARRAY_SIZE(hsr_pair); i++) { 689 slave = dsa_to_port(ds, hsr_pair[i])->slave; 690 slave->features &= ~XRS7000X_SUPPORTED_HSR_FEATURES; 691 } 692 693 return 0; 694 } 695 696 static const struct dsa_switch_ops xrs700x_ops = { 697 .get_tag_protocol = xrs700x_get_tag_protocol, 698 .setup = xrs700x_setup, 699 .teardown = xrs700x_teardown, 700 .port_stp_state_set = xrs700x_port_stp_state_set, 701 .phylink_get_caps = xrs700x_phylink_get_caps, 702 .phylink_mac_link_up = xrs700x_mac_link_up, 703 .get_strings = xrs700x_get_strings, 704 .get_sset_count = xrs700x_get_sset_count, 705 .get_ethtool_stats = xrs700x_get_ethtool_stats, 706 .get_stats64 = xrs700x_get_stats64, 707 .port_bridge_join = xrs700x_bridge_join, 708 .port_bridge_leave = xrs700x_bridge_leave, 709 .port_hsr_join = xrs700x_hsr_join, 710 .port_hsr_leave = xrs700x_hsr_leave, 711 }; 712 713 static int xrs700x_detect(struct xrs700x *priv) 714 { 715 const struct xrs700x_info *info; 716 unsigned int id; 717 int ret; 718 719 ret = regmap_read(priv->regmap, XRS_DEV_ID0, &id); 720 if (ret) { 721 dev_err(priv->dev, "error %d while reading switch id.\n", 722 ret); 723 return ret; 724 } 725 726 info = of_device_get_match_data(priv->dev); 727 if (!info) 728 return -EINVAL; 729 730 if (info->id == id) { 731 priv->ds->num_ports = info->num_ports; 732 dev_info(priv->dev, "%s detected.\n", info->name); 733 return 0; 734 } 735 736 dev_err(priv->dev, "expected switch id 0x%x but found 0x%x.\n", 737 info->id, id); 738 739 return -ENODEV; 740 } 741 742 struct xrs700x *xrs700x_switch_alloc(struct device *base, void *devpriv) 743 { 744 struct dsa_switch *ds; 745 struct xrs700x *priv; 746 747 ds = devm_kzalloc(base, sizeof(*ds), GFP_KERNEL); 748 if (!ds) 749 return NULL; 750 751 ds->dev = base; 752 753 priv = devm_kzalloc(base, sizeof(*priv), GFP_KERNEL); 754 if (!priv) 755 return NULL; 756 757 INIT_DELAYED_WORK(&priv->mib_work, xrs700x_mib_work); 758 759 ds->ops = &xrs700x_ops; 760 ds->priv = priv; 761 priv->dev = base; 762 763 priv->ds = ds; 764 priv->priv = devpriv; 765 766 return priv; 767 } 768 EXPORT_SYMBOL(xrs700x_switch_alloc); 769 770 static int xrs700x_alloc_port_mib(struct xrs700x *priv, int port) 771 { 772 struct xrs700x_port *p = &priv->ports[port]; 773 774 p->mib_data = devm_kcalloc(priv->dev, ARRAY_SIZE(xrs700x_mibs), 775 sizeof(*p->mib_data), GFP_KERNEL); 776 if (!p->mib_data) 777 return -ENOMEM; 778 779 mutex_init(&p->mib_mutex); 780 u64_stats_init(&p->syncp); 781 782 return 0; 783 } 784 785 int xrs700x_switch_register(struct xrs700x *priv) 786 { 787 int ret; 788 int i; 789 790 ret = xrs700x_detect(priv); 791 if (ret) 792 return ret; 793 794 ret = xrs700x_setup_regmap_range(priv); 795 if (ret) 796 return ret; 797 798 priv->ports = devm_kcalloc(priv->dev, priv->ds->num_ports, 799 sizeof(*priv->ports), GFP_KERNEL); 800 if (!priv->ports) 801 return -ENOMEM; 802 803 for (i = 0; i < priv->ds->num_ports; i++) { 804 ret = xrs700x_alloc_port_mib(priv, i); 805 if (ret) 806 return ret; 807 } 808 809 return dsa_register_switch(priv->ds); 810 } 811 EXPORT_SYMBOL(xrs700x_switch_register); 812 813 void xrs700x_switch_remove(struct xrs700x *priv) 814 { 815 dsa_unregister_switch(priv->ds); 816 } 817 EXPORT_SYMBOL(xrs700x_switch_remove); 818 819 void xrs700x_switch_shutdown(struct xrs700x *priv) 820 { 821 dsa_switch_shutdown(priv->ds); 822 } 823 EXPORT_SYMBOL(xrs700x_switch_shutdown); 824 825 MODULE_AUTHOR("George McCollister <george.mccollister@gmail.com>"); 826 MODULE_DESCRIPTION("Arrow SpeedChips XRS700x DSA driver"); 827 MODULE_LICENSE("GPL v2"); 828