1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) 2 /* Copyright 2019 NXP */ 3 4 #include <linux/acpi.h> 5 #include <linux/pcs-lynx.h> 6 #include <linux/phy/phy.h> 7 #include <linux/property.h> 8 9 #include "dpaa2-eth.h" 10 #include "dpaa2-mac.h" 11 12 #define phylink_to_dpaa2_mac(config) \ 13 container_of((config), struct dpaa2_mac, phylink_config) 14 15 #define DPMAC_PROTOCOL_CHANGE_VER_MAJOR 4 16 #define DPMAC_PROTOCOL_CHANGE_VER_MINOR 8 17 18 #define DPAA2_MAC_FEATURE_PROTOCOL_CHANGE BIT(0) 19 20 static int dpaa2_mac_cmp_ver(struct dpaa2_mac *mac, 21 u16 ver_major, u16 ver_minor) 22 { 23 if (mac->ver_major == ver_major) 24 return mac->ver_minor - ver_minor; 25 return mac->ver_major - ver_major; 26 } 27 28 static void dpaa2_mac_detect_features(struct dpaa2_mac *mac) 29 { 30 mac->features = 0; 31 32 if (dpaa2_mac_cmp_ver(mac, DPMAC_PROTOCOL_CHANGE_VER_MAJOR, 33 DPMAC_PROTOCOL_CHANGE_VER_MINOR) >= 0) 34 mac->features |= DPAA2_MAC_FEATURE_PROTOCOL_CHANGE; 35 } 36 37 static int phy_mode(enum dpmac_eth_if eth_if, phy_interface_t *if_mode) 38 { 39 *if_mode = PHY_INTERFACE_MODE_NA; 40 41 switch (eth_if) { 42 case DPMAC_ETH_IF_RGMII: 43 *if_mode = PHY_INTERFACE_MODE_RGMII; 44 break; 45 case DPMAC_ETH_IF_USXGMII: 46 *if_mode = PHY_INTERFACE_MODE_USXGMII; 47 break; 48 case DPMAC_ETH_IF_QSGMII: 49 *if_mode = PHY_INTERFACE_MODE_QSGMII; 50 break; 51 case DPMAC_ETH_IF_SGMII: 52 *if_mode = PHY_INTERFACE_MODE_SGMII; 53 break; 54 case DPMAC_ETH_IF_XFI: 55 *if_mode = PHY_INTERFACE_MODE_10GBASER; 56 break; 57 default: 58 return -EINVAL; 59 } 60 61 return 0; 62 } 63 64 static enum dpmac_eth_if dpmac_eth_if_mode(phy_interface_t if_mode) 65 { 66 switch (if_mode) { 67 case PHY_INTERFACE_MODE_RGMII: 68 case PHY_INTERFACE_MODE_RGMII_ID: 69 case PHY_INTERFACE_MODE_RGMII_RXID: 70 case PHY_INTERFACE_MODE_RGMII_TXID: 71 return DPMAC_ETH_IF_RGMII; 72 case PHY_INTERFACE_MODE_USXGMII: 73 return DPMAC_ETH_IF_USXGMII; 74 case PHY_INTERFACE_MODE_QSGMII: 75 return DPMAC_ETH_IF_QSGMII; 76 case PHY_INTERFACE_MODE_SGMII: 77 return DPMAC_ETH_IF_SGMII; 78 case PHY_INTERFACE_MODE_10GBASER: 79 return DPMAC_ETH_IF_XFI; 80 case PHY_INTERFACE_MODE_1000BASEX: 81 return DPMAC_ETH_IF_1000BASEX; 82 default: 83 return DPMAC_ETH_IF_MII; 84 } 85 } 86 87 static struct fwnode_handle *dpaa2_mac_get_node(struct device *dev, 88 u16 dpmac_id) 89 { 90 struct fwnode_handle *fwnode, *parent = NULL, *child = NULL; 91 struct device_node *dpmacs = NULL; 92 int err; 93 u32 id; 94 95 fwnode = dev_fwnode(dev->parent); 96 if (is_of_node(fwnode)) { 97 dpmacs = of_find_node_by_name(NULL, "dpmacs"); 98 if (!dpmacs) 99 return NULL; 100 parent = of_fwnode_handle(dpmacs); 101 } else if (is_acpi_node(fwnode)) { 102 parent = fwnode; 103 } else { 104 /* The root dprc device didn't yet get to finalize it's probe, 105 * thus the fwnode field is not yet set. Defer probe if we are 106 * facing this situation. 107 */ 108 dev_dbg(dev, "dprc not finished probing\n"); 109 return ERR_PTR(-EPROBE_DEFER); 110 } 111 112 fwnode_for_each_child_node(parent, child) { 113 err = -EINVAL; 114 if (is_acpi_device_node(child)) 115 err = acpi_get_local_address(ACPI_HANDLE_FWNODE(child), &id); 116 else if (is_of_node(child)) 117 err = of_property_read_u32(to_of_node(child), "reg", &id); 118 if (err) 119 continue; 120 121 if (id == dpmac_id) { 122 of_node_put(dpmacs); 123 return child; 124 } 125 } 126 of_node_put(dpmacs); 127 return NULL; 128 } 129 130 static int dpaa2_mac_get_if_mode(struct fwnode_handle *dpmac_node, 131 struct dpmac_attr attr) 132 { 133 phy_interface_t if_mode; 134 int err; 135 136 err = fwnode_get_phy_mode(dpmac_node); 137 if (err > 0) 138 return err; 139 140 err = phy_mode(attr.eth_if, &if_mode); 141 if (!err) 142 return if_mode; 143 144 return err; 145 } 146 147 static struct phylink_pcs *dpaa2_mac_select_pcs(struct phylink_config *config, 148 phy_interface_t interface) 149 { 150 struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config); 151 152 return mac->pcs; 153 } 154 155 static void dpaa2_mac_config(struct phylink_config *config, unsigned int mode, 156 const struct phylink_link_state *state) 157 { 158 struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config); 159 struct dpmac_link_state *dpmac_state = &mac->state; 160 int err; 161 162 if (state->an_enabled) 163 dpmac_state->options |= DPMAC_LINK_OPT_AUTONEG; 164 else 165 dpmac_state->options &= ~DPMAC_LINK_OPT_AUTONEG; 166 167 err = dpmac_set_link_state(mac->mc_io, 0, 168 mac->mc_dev->mc_handle, dpmac_state); 169 if (err) 170 netdev_err(mac->net_dev, "%s: dpmac_set_link_state() = %d\n", 171 __func__, err); 172 173 if (!mac->serdes_phy) 174 return; 175 176 /* This happens only if we support changing of protocol at runtime */ 177 err = dpmac_set_protocol(mac->mc_io, 0, mac->mc_dev->mc_handle, 178 dpmac_eth_if_mode(state->interface)); 179 if (err) 180 netdev_err(mac->net_dev, "dpmac_set_protocol() = %d\n", err); 181 182 err = phy_set_mode_ext(mac->serdes_phy, PHY_MODE_ETHERNET, state->interface); 183 if (err) 184 netdev_err(mac->net_dev, "phy_set_mode_ext() = %d\n", err); 185 } 186 187 static void dpaa2_mac_link_up(struct phylink_config *config, 188 struct phy_device *phy, 189 unsigned int mode, phy_interface_t interface, 190 int speed, int duplex, 191 bool tx_pause, bool rx_pause) 192 { 193 struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config); 194 struct dpmac_link_state *dpmac_state = &mac->state; 195 int err; 196 197 dpmac_state->up = 1; 198 199 dpmac_state->rate = speed; 200 201 if (duplex == DUPLEX_HALF) 202 dpmac_state->options |= DPMAC_LINK_OPT_HALF_DUPLEX; 203 else if (duplex == DUPLEX_FULL) 204 dpmac_state->options &= ~DPMAC_LINK_OPT_HALF_DUPLEX; 205 206 if (rx_pause) 207 dpmac_state->options |= DPMAC_LINK_OPT_PAUSE; 208 else 209 dpmac_state->options &= ~DPMAC_LINK_OPT_PAUSE; 210 211 if (rx_pause ^ tx_pause) 212 dpmac_state->options |= DPMAC_LINK_OPT_ASYM_PAUSE; 213 else 214 dpmac_state->options &= ~DPMAC_LINK_OPT_ASYM_PAUSE; 215 216 err = dpmac_set_link_state(mac->mc_io, 0, 217 mac->mc_dev->mc_handle, dpmac_state); 218 if (err) 219 netdev_err(mac->net_dev, "%s: dpmac_set_link_state() = %d\n", 220 __func__, err); 221 } 222 223 static void dpaa2_mac_link_down(struct phylink_config *config, 224 unsigned int mode, 225 phy_interface_t interface) 226 { 227 struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config); 228 struct dpmac_link_state *dpmac_state = &mac->state; 229 int err; 230 231 dpmac_state->up = 0; 232 err = dpmac_set_link_state(mac->mc_io, 0, 233 mac->mc_dev->mc_handle, dpmac_state); 234 if (err) 235 netdev_err(mac->net_dev, "dpmac_set_link_state() = %d\n", err); 236 } 237 238 static const struct phylink_mac_ops dpaa2_mac_phylink_ops = { 239 .validate = phylink_generic_validate, 240 .mac_select_pcs = dpaa2_mac_select_pcs, 241 .mac_config = dpaa2_mac_config, 242 .mac_link_up = dpaa2_mac_link_up, 243 .mac_link_down = dpaa2_mac_link_down, 244 }; 245 246 static int dpaa2_pcs_create(struct dpaa2_mac *mac, 247 struct fwnode_handle *dpmac_node, 248 int id) 249 { 250 struct mdio_device *mdiodev; 251 struct fwnode_handle *node; 252 253 node = fwnode_find_reference(dpmac_node, "pcs-handle", 0); 254 if (IS_ERR(node)) { 255 /* do not error out on old DTS files */ 256 netdev_warn(mac->net_dev, "pcs-handle node not found\n"); 257 return 0; 258 } 259 260 if (!fwnode_device_is_available(node)) { 261 netdev_err(mac->net_dev, "pcs-handle node not available\n"); 262 fwnode_handle_put(node); 263 return -ENODEV; 264 } 265 266 mdiodev = fwnode_mdio_find_device(node); 267 fwnode_handle_put(node); 268 if (!mdiodev) { 269 netdev_dbg(mac->net_dev, "missing PCS device\n"); 270 return -EPROBE_DEFER; 271 } 272 273 mac->pcs = lynx_pcs_create(mdiodev); 274 if (!mac->pcs) { 275 netdev_err(mac->net_dev, "lynx_pcs_create() failed\n"); 276 put_device(&mdiodev->dev); 277 return -ENOMEM; 278 } 279 280 return 0; 281 } 282 283 static void dpaa2_pcs_destroy(struct dpaa2_mac *mac) 284 { 285 struct phylink_pcs *phylink_pcs = mac->pcs; 286 287 if (phylink_pcs) { 288 struct mdio_device *mdio = lynx_get_mdio_device(phylink_pcs); 289 struct device *dev = &mdio->dev; 290 291 lynx_pcs_destroy(phylink_pcs); 292 put_device(dev); 293 mac->pcs = NULL; 294 } 295 } 296 297 static void dpaa2_mac_set_supported_interfaces(struct dpaa2_mac *mac) 298 { 299 int intf, err; 300 301 /* We support the current interface mode, and if we have a PCS 302 * similar interface modes that do not require the SerDes lane to be 303 * reconfigured. 304 */ 305 __set_bit(mac->if_mode, mac->phylink_config.supported_interfaces); 306 if (mac->pcs) { 307 switch (mac->if_mode) { 308 case PHY_INTERFACE_MODE_1000BASEX: 309 case PHY_INTERFACE_MODE_SGMII: 310 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 311 mac->phylink_config.supported_interfaces); 312 __set_bit(PHY_INTERFACE_MODE_SGMII, 313 mac->phylink_config.supported_interfaces); 314 break; 315 316 default: 317 break; 318 } 319 } 320 321 if (!mac->serdes_phy) 322 return; 323 324 /* In case we have access to the SerDes phy/lane, then ask the SerDes 325 * driver what interfaces are supported based on the current PLL 326 * configuration. 327 */ 328 for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) { 329 if (intf == PHY_INTERFACE_MODE_NA) 330 continue; 331 332 err = phy_validate(mac->serdes_phy, PHY_MODE_ETHERNET, intf, NULL); 333 if (err) 334 continue; 335 336 __set_bit(intf, mac->phylink_config.supported_interfaces); 337 } 338 } 339 340 void dpaa2_mac_start(struct dpaa2_mac *mac) 341 { 342 if (mac->serdes_phy) 343 phy_power_on(mac->serdes_phy); 344 } 345 346 void dpaa2_mac_stop(struct dpaa2_mac *mac) 347 { 348 if (mac->serdes_phy) 349 phy_power_off(mac->serdes_phy); 350 } 351 352 int dpaa2_mac_connect(struct dpaa2_mac *mac) 353 { 354 struct net_device *net_dev = mac->net_dev; 355 struct fwnode_handle *dpmac_node; 356 struct phy *serdes_phy = NULL; 357 struct phylink *phylink; 358 int err; 359 360 mac->if_link_type = mac->attr.link_type; 361 362 dpmac_node = mac->fw_node; 363 if (!dpmac_node) { 364 netdev_err(net_dev, "No dpmac@%d node found.\n", mac->attr.id); 365 return -ENODEV; 366 } 367 368 err = dpaa2_mac_get_if_mode(dpmac_node, mac->attr); 369 if (err < 0) 370 return -EINVAL; 371 mac->if_mode = err; 372 373 if (mac->features & DPAA2_MAC_FEATURE_PROTOCOL_CHANGE && 374 !phy_interface_mode_is_rgmii(mac->if_mode) && 375 is_of_node(dpmac_node)) { 376 serdes_phy = of_phy_get(to_of_node(dpmac_node), NULL); 377 378 if (serdes_phy == ERR_PTR(-ENODEV)) 379 serdes_phy = NULL; 380 else if (IS_ERR(serdes_phy)) 381 return PTR_ERR(serdes_phy); 382 else 383 phy_init(serdes_phy); 384 } 385 mac->serdes_phy = serdes_phy; 386 387 /* The MAC does not have the capability to add RGMII delays so 388 * error out if the interface mode requests them and there is no PHY 389 * to act upon them 390 */ 391 if (of_phy_is_fixed_link(to_of_node(dpmac_node)) && 392 (mac->if_mode == PHY_INTERFACE_MODE_RGMII_ID || 393 mac->if_mode == PHY_INTERFACE_MODE_RGMII_RXID || 394 mac->if_mode == PHY_INTERFACE_MODE_RGMII_TXID)) { 395 netdev_err(net_dev, "RGMII delay not supported\n"); 396 return -EINVAL; 397 } 398 399 if ((mac->attr.link_type == DPMAC_LINK_TYPE_PHY && 400 mac->attr.eth_if != DPMAC_ETH_IF_RGMII) || 401 mac->attr.link_type == DPMAC_LINK_TYPE_BACKPLANE) { 402 err = dpaa2_pcs_create(mac, dpmac_node, mac->attr.id); 403 if (err) 404 return err; 405 } 406 407 memset(&mac->phylink_config, 0, sizeof(mac->phylink_config)); 408 mac->phylink_config.dev = &net_dev->dev; 409 mac->phylink_config.type = PHYLINK_NETDEV; 410 411 mac->phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_ASYM_PAUSE | 412 MAC_10FD | MAC_100FD | MAC_1000FD | MAC_2500FD | MAC_5000FD | 413 MAC_10000FD; 414 415 dpaa2_mac_set_supported_interfaces(mac); 416 417 phylink = phylink_create(&mac->phylink_config, 418 dpmac_node, mac->if_mode, 419 &dpaa2_mac_phylink_ops); 420 if (IS_ERR(phylink)) { 421 err = PTR_ERR(phylink); 422 goto err_pcs_destroy; 423 } 424 mac->phylink = phylink; 425 426 err = phylink_fwnode_phy_connect(mac->phylink, dpmac_node, 0); 427 if (err) { 428 netdev_err(net_dev, "phylink_fwnode_phy_connect() = %d\n", err); 429 goto err_phylink_destroy; 430 } 431 432 return 0; 433 434 err_phylink_destroy: 435 phylink_destroy(mac->phylink); 436 err_pcs_destroy: 437 dpaa2_pcs_destroy(mac); 438 439 return err; 440 } 441 442 void dpaa2_mac_disconnect(struct dpaa2_mac *mac) 443 { 444 if (!mac->phylink) 445 return; 446 447 phylink_disconnect_phy(mac->phylink); 448 phylink_destroy(mac->phylink); 449 dpaa2_pcs_destroy(mac); 450 of_phy_put(mac->serdes_phy); 451 mac->serdes_phy = NULL; 452 } 453 454 int dpaa2_mac_open(struct dpaa2_mac *mac) 455 { 456 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 457 struct net_device *net_dev = mac->net_dev; 458 struct fwnode_handle *fw_node; 459 int err; 460 461 err = dpmac_open(mac->mc_io, 0, dpmac_dev->obj_desc.id, 462 &dpmac_dev->mc_handle); 463 if (err || !dpmac_dev->mc_handle) { 464 netdev_err(net_dev, "dpmac_open() = %d\n", err); 465 return -ENODEV; 466 } 467 468 err = dpmac_get_attributes(mac->mc_io, 0, dpmac_dev->mc_handle, 469 &mac->attr); 470 if (err) { 471 netdev_err(net_dev, "dpmac_get_attributes() = %d\n", err); 472 goto err_close_dpmac; 473 } 474 475 err = dpmac_get_api_version(mac->mc_io, 0, &mac->ver_major, &mac->ver_minor); 476 if (err) { 477 netdev_err(net_dev, "dpmac_get_api_version() = %d\n", err); 478 goto err_close_dpmac; 479 } 480 481 dpaa2_mac_detect_features(mac); 482 483 /* Find the device node representing the MAC device and link the device 484 * behind the associated netdev to it. 485 */ 486 fw_node = dpaa2_mac_get_node(&mac->mc_dev->dev, mac->attr.id); 487 if (IS_ERR(fw_node)) { 488 err = PTR_ERR(fw_node); 489 goto err_close_dpmac; 490 } 491 492 mac->fw_node = fw_node; 493 net_dev->dev.of_node = to_of_node(mac->fw_node); 494 495 return 0; 496 497 err_close_dpmac: 498 dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle); 499 return err; 500 } 501 502 void dpaa2_mac_close(struct dpaa2_mac *mac) 503 { 504 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 505 506 dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle); 507 if (mac->fw_node) 508 fwnode_handle_put(mac->fw_node); 509 } 510 511 static char dpaa2_mac_ethtool_stats[][ETH_GSTRING_LEN] = { 512 [DPMAC_CNT_ING_ALL_FRAME] = "[mac] rx all frames", 513 [DPMAC_CNT_ING_GOOD_FRAME] = "[mac] rx frames ok", 514 [DPMAC_CNT_ING_ERR_FRAME] = "[mac] rx frame errors", 515 [DPMAC_CNT_ING_FRAME_DISCARD] = "[mac] rx frame discards", 516 [DPMAC_CNT_ING_UCAST_FRAME] = "[mac] rx u-cast", 517 [DPMAC_CNT_ING_BCAST_FRAME] = "[mac] rx b-cast", 518 [DPMAC_CNT_ING_MCAST_FRAME] = "[mac] rx m-cast", 519 [DPMAC_CNT_ING_FRAME_64] = "[mac] rx 64 bytes", 520 [DPMAC_CNT_ING_FRAME_127] = "[mac] rx 65-127 bytes", 521 [DPMAC_CNT_ING_FRAME_255] = "[mac] rx 128-255 bytes", 522 [DPMAC_CNT_ING_FRAME_511] = "[mac] rx 256-511 bytes", 523 [DPMAC_CNT_ING_FRAME_1023] = "[mac] rx 512-1023 bytes", 524 [DPMAC_CNT_ING_FRAME_1518] = "[mac] rx 1024-1518 bytes", 525 [DPMAC_CNT_ING_FRAME_1519_MAX] = "[mac] rx 1519-max bytes", 526 [DPMAC_CNT_ING_FRAG] = "[mac] rx frags", 527 [DPMAC_CNT_ING_JABBER] = "[mac] rx jabber", 528 [DPMAC_CNT_ING_ALIGN_ERR] = "[mac] rx align errors", 529 [DPMAC_CNT_ING_OVERSIZED] = "[mac] rx oversized", 530 [DPMAC_CNT_ING_VALID_PAUSE_FRAME] = "[mac] rx pause", 531 [DPMAC_CNT_ING_BYTE] = "[mac] rx bytes", 532 [DPMAC_CNT_EGR_GOOD_FRAME] = "[mac] tx frames ok", 533 [DPMAC_CNT_EGR_UCAST_FRAME] = "[mac] tx u-cast", 534 [DPMAC_CNT_EGR_MCAST_FRAME] = "[mac] tx m-cast", 535 [DPMAC_CNT_EGR_BCAST_FRAME] = "[mac] tx b-cast", 536 [DPMAC_CNT_EGR_ERR_FRAME] = "[mac] tx frame errors", 537 [DPMAC_CNT_EGR_UNDERSIZED] = "[mac] tx undersized", 538 [DPMAC_CNT_EGR_VALID_PAUSE_FRAME] = "[mac] tx b-pause", 539 [DPMAC_CNT_EGR_BYTE] = "[mac] tx bytes", 540 }; 541 542 #define DPAA2_MAC_NUM_STATS ARRAY_SIZE(dpaa2_mac_ethtool_stats) 543 544 int dpaa2_mac_get_sset_count(void) 545 { 546 return DPAA2_MAC_NUM_STATS; 547 } 548 549 void dpaa2_mac_get_strings(u8 *data) 550 { 551 u8 *p = data; 552 int i; 553 554 for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) { 555 strscpy(p, dpaa2_mac_ethtool_stats[i], ETH_GSTRING_LEN); 556 p += ETH_GSTRING_LEN; 557 } 558 } 559 560 void dpaa2_mac_get_ethtool_stats(struct dpaa2_mac *mac, u64 *data) 561 { 562 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 563 int i, err; 564 u64 value; 565 566 for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) { 567 err = dpmac_get_counter(mac->mc_io, 0, dpmac_dev->mc_handle, 568 i, &value); 569 if (err) { 570 netdev_err_once(mac->net_dev, 571 "dpmac_get_counter error %d\n", err); 572 *(data + i) = U64_MAX; 573 continue; 574 } 575 *(data + i) = value; 576 } 577 } 578