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