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 .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 netdev_dbg(mac->net_dev, "missing PCS device\n"); 269 return -EPROBE_DEFER; 270 } 271 272 mac->pcs = lynx_pcs_create(mdiodev); 273 if (!mac->pcs) { 274 netdev_err(mac->net_dev, "lynx_pcs_create() failed\n"); 275 put_device(&mdiodev->dev); 276 return -ENOMEM; 277 } 278 279 return 0; 280 } 281 282 static void dpaa2_pcs_destroy(struct dpaa2_mac *mac) 283 { 284 struct phylink_pcs *phylink_pcs = mac->pcs; 285 286 if (phylink_pcs) { 287 struct mdio_device *mdio = lynx_get_mdio_device(phylink_pcs); 288 struct device *dev = &mdio->dev; 289 290 lynx_pcs_destroy(phylink_pcs); 291 put_device(dev); 292 mac->pcs = NULL; 293 } 294 } 295 296 static void dpaa2_mac_set_supported_interfaces(struct dpaa2_mac *mac) 297 { 298 int intf, err; 299 300 /* We support the current interface mode, and if we have a PCS 301 * similar interface modes that do not require the SerDes lane to be 302 * reconfigured. 303 */ 304 __set_bit(mac->if_mode, mac->phylink_config.supported_interfaces); 305 if (mac->pcs) { 306 switch (mac->if_mode) { 307 case PHY_INTERFACE_MODE_1000BASEX: 308 case PHY_INTERFACE_MODE_SGMII: 309 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 310 mac->phylink_config.supported_interfaces); 311 __set_bit(PHY_INTERFACE_MODE_SGMII, 312 mac->phylink_config.supported_interfaces); 313 break; 314 315 default: 316 break; 317 } 318 } 319 320 if (!mac->serdes_phy) 321 return; 322 323 /* In case we have access to the SerDes phy/lane, then ask the SerDes 324 * driver what interfaces are supported based on the current PLL 325 * configuration. 326 */ 327 for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) { 328 if (intf == PHY_INTERFACE_MODE_NA) 329 continue; 330 331 err = phy_validate(mac->serdes_phy, PHY_MODE_ETHERNET, intf, NULL); 332 if (err) 333 continue; 334 335 __set_bit(intf, mac->phylink_config.supported_interfaces); 336 } 337 } 338 339 void dpaa2_mac_start(struct dpaa2_mac *mac) 340 { 341 if (mac->serdes_phy) 342 phy_power_on(mac->serdes_phy); 343 } 344 345 void dpaa2_mac_stop(struct dpaa2_mac *mac) 346 { 347 if (mac->serdes_phy) 348 phy_power_off(mac->serdes_phy); 349 } 350 351 int dpaa2_mac_connect(struct dpaa2_mac *mac) 352 { 353 struct net_device *net_dev = mac->net_dev; 354 struct fwnode_handle *dpmac_node; 355 struct phy *serdes_phy = NULL; 356 struct phylink *phylink; 357 int err; 358 359 mac->if_link_type = mac->attr.link_type; 360 361 dpmac_node = mac->fw_node; 362 if (!dpmac_node) { 363 netdev_err(net_dev, "No dpmac@%d node found.\n", mac->attr.id); 364 return -ENODEV; 365 } 366 367 err = dpaa2_mac_get_if_mode(dpmac_node, mac->attr); 368 if (err < 0) 369 return -EINVAL; 370 mac->if_mode = err; 371 372 if (mac->features & DPAA2_MAC_FEATURE_PROTOCOL_CHANGE && 373 !phy_interface_mode_is_rgmii(mac->if_mode) && 374 is_of_node(dpmac_node)) { 375 serdes_phy = of_phy_get(to_of_node(dpmac_node), NULL); 376 377 if (serdes_phy == ERR_PTR(-ENODEV)) 378 serdes_phy = NULL; 379 else if (IS_ERR(serdes_phy)) 380 return PTR_ERR(serdes_phy); 381 else 382 phy_init(serdes_phy); 383 } 384 mac->serdes_phy = serdes_phy; 385 386 /* The MAC does not have the capability to add RGMII delays so 387 * error out if the interface mode requests them and there is no PHY 388 * to act upon them 389 */ 390 if (of_phy_is_fixed_link(to_of_node(dpmac_node)) && 391 (mac->if_mode == PHY_INTERFACE_MODE_RGMII_ID || 392 mac->if_mode == PHY_INTERFACE_MODE_RGMII_RXID || 393 mac->if_mode == PHY_INTERFACE_MODE_RGMII_TXID)) { 394 netdev_err(net_dev, "RGMII delay not supported\n"); 395 return -EINVAL; 396 } 397 398 if ((mac->attr.link_type == DPMAC_LINK_TYPE_PHY && 399 mac->attr.eth_if != DPMAC_ETH_IF_RGMII) || 400 mac->attr.link_type == DPMAC_LINK_TYPE_BACKPLANE) { 401 err = dpaa2_pcs_create(mac, dpmac_node, mac->attr.id); 402 if (err) 403 return err; 404 } 405 406 memset(&mac->phylink_config, 0, sizeof(mac->phylink_config)); 407 mac->phylink_config.dev = &net_dev->dev; 408 mac->phylink_config.type = PHYLINK_NETDEV; 409 410 mac->phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_ASYM_PAUSE | 411 MAC_10FD | MAC_100FD | MAC_1000FD | MAC_2500FD | MAC_5000FD | 412 MAC_10000FD; 413 414 dpaa2_mac_set_supported_interfaces(mac); 415 416 phylink = phylink_create(&mac->phylink_config, 417 dpmac_node, mac->if_mode, 418 &dpaa2_mac_phylink_ops); 419 if (IS_ERR(phylink)) { 420 err = PTR_ERR(phylink); 421 goto err_pcs_destroy; 422 } 423 mac->phylink = phylink; 424 425 err = phylink_fwnode_phy_connect(mac->phylink, dpmac_node, 0); 426 if (err) { 427 netdev_err(net_dev, "phylink_fwnode_phy_connect() = %d\n", err); 428 goto err_phylink_destroy; 429 } 430 431 return 0; 432 433 err_phylink_destroy: 434 phylink_destroy(mac->phylink); 435 err_pcs_destroy: 436 dpaa2_pcs_destroy(mac); 437 438 return err; 439 } 440 441 void dpaa2_mac_disconnect(struct dpaa2_mac *mac) 442 { 443 if (!mac->phylink) 444 return; 445 446 phylink_disconnect_phy(mac->phylink); 447 phylink_destroy(mac->phylink); 448 dpaa2_pcs_destroy(mac); 449 of_phy_put(mac->serdes_phy); 450 mac->serdes_phy = NULL; 451 } 452 453 int dpaa2_mac_open(struct dpaa2_mac *mac) 454 { 455 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 456 struct net_device *net_dev = mac->net_dev; 457 struct fwnode_handle *fw_node; 458 int err; 459 460 err = dpmac_open(mac->mc_io, 0, dpmac_dev->obj_desc.id, 461 &dpmac_dev->mc_handle); 462 if (err || !dpmac_dev->mc_handle) { 463 netdev_err(net_dev, "dpmac_open() = %d\n", err); 464 return -ENODEV; 465 } 466 467 err = dpmac_get_attributes(mac->mc_io, 0, dpmac_dev->mc_handle, 468 &mac->attr); 469 if (err) { 470 netdev_err(net_dev, "dpmac_get_attributes() = %d\n", err); 471 goto err_close_dpmac; 472 } 473 474 err = dpmac_get_api_version(mac->mc_io, 0, &mac->ver_major, &mac->ver_minor); 475 if (err) { 476 netdev_err(net_dev, "dpmac_get_api_version() = %d\n", err); 477 goto err_close_dpmac; 478 } 479 480 dpaa2_mac_detect_features(mac); 481 482 /* Find the device node representing the MAC device and link the device 483 * behind the associated netdev to it. 484 */ 485 fw_node = dpaa2_mac_get_node(&mac->mc_dev->dev, mac->attr.id); 486 if (IS_ERR(fw_node)) { 487 err = PTR_ERR(fw_node); 488 goto err_close_dpmac; 489 } 490 491 mac->fw_node = fw_node; 492 net_dev->dev.of_node = to_of_node(mac->fw_node); 493 494 return 0; 495 496 err_close_dpmac: 497 dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle); 498 return err; 499 } 500 501 void dpaa2_mac_close(struct dpaa2_mac *mac) 502 { 503 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 504 505 dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle); 506 if (mac->fw_node) 507 fwnode_handle_put(mac->fw_node); 508 } 509 510 static char dpaa2_mac_ethtool_stats[][ETH_GSTRING_LEN] = { 511 [DPMAC_CNT_ING_ALL_FRAME] = "[mac] rx all frames", 512 [DPMAC_CNT_ING_GOOD_FRAME] = "[mac] rx frames ok", 513 [DPMAC_CNT_ING_ERR_FRAME] = "[mac] rx frame errors", 514 [DPMAC_CNT_ING_FRAME_DISCARD] = "[mac] rx frame discards", 515 [DPMAC_CNT_ING_UCAST_FRAME] = "[mac] rx u-cast", 516 [DPMAC_CNT_ING_BCAST_FRAME] = "[mac] rx b-cast", 517 [DPMAC_CNT_ING_MCAST_FRAME] = "[mac] rx m-cast", 518 [DPMAC_CNT_ING_FRAME_64] = "[mac] rx 64 bytes", 519 [DPMAC_CNT_ING_FRAME_127] = "[mac] rx 65-127 bytes", 520 [DPMAC_CNT_ING_FRAME_255] = "[mac] rx 128-255 bytes", 521 [DPMAC_CNT_ING_FRAME_511] = "[mac] rx 256-511 bytes", 522 [DPMAC_CNT_ING_FRAME_1023] = "[mac] rx 512-1023 bytes", 523 [DPMAC_CNT_ING_FRAME_1518] = "[mac] rx 1024-1518 bytes", 524 [DPMAC_CNT_ING_FRAME_1519_MAX] = "[mac] rx 1519-max bytes", 525 [DPMAC_CNT_ING_FRAG] = "[mac] rx frags", 526 [DPMAC_CNT_ING_JABBER] = "[mac] rx jabber", 527 [DPMAC_CNT_ING_ALIGN_ERR] = "[mac] rx align errors", 528 [DPMAC_CNT_ING_OVERSIZED] = "[mac] rx oversized", 529 [DPMAC_CNT_ING_VALID_PAUSE_FRAME] = "[mac] rx pause", 530 [DPMAC_CNT_ING_BYTE] = "[mac] rx bytes", 531 [DPMAC_CNT_EGR_GOOD_FRAME] = "[mac] tx frames ok", 532 [DPMAC_CNT_EGR_UCAST_FRAME] = "[mac] tx u-cast", 533 [DPMAC_CNT_EGR_MCAST_FRAME] = "[mac] tx m-cast", 534 [DPMAC_CNT_EGR_BCAST_FRAME] = "[mac] tx b-cast", 535 [DPMAC_CNT_EGR_ERR_FRAME] = "[mac] tx frame errors", 536 [DPMAC_CNT_EGR_UNDERSIZED] = "[mac] tx undersized", 537 [DPMAC_CNT_EGR_VALID_PAUSE_FRAME] = "[mac] tx b-pause", 538 [DPMAC_CNT_EGR_BYTE] = "[mac] tx bytes", 539 }; 540 541 #define DPAA2_MAC_NUM_STATS ARRAY_SIZE(dpaa2_mac_ethtool_stats) 542 543 int dpaa2_mac_get_sset_count(void) 544 { 545 return DPAA2_MAC_NUM_STATS; 546 } 547 548 void dpaa2_mac_get_strings(u8 *data) 549 { 550 u8 *p = data; 551 int i; 552 553 for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) { 554 strscpy(p, dpaa2_mac_ethtool_stats[i], ETH_GSTRING_LEN); 555 p += ETH_GSTRING_LEN; 556 } 557 } 558 559 void dpaa2_mac_get_ethtool_stats(struct dpaa2_mac *mac, u64 *data) 560 { 561 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 562 int i, err; 563 u64 value; 564 565 for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) { 566 err = dpmac_get_counter(mac->mc_io, 0, dpmac_dev->mc_handle, 567 i, &value); 568 if (err) { 569 netdev_err_once(mac->net_dev, 570 "dpmac_get_counter error %d\n", err); 571 *(data + i) = U64_MAX; 572 continue; 573 } 574 *(data + i) = value; 575 } 576 } 577