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 case DPMAC_ETH_IF_CAUI: 58 *if_mode = PHY_INTERFACE_MODE_25GBASER; 59 break; 60 default: 61 return -EINVAL; 62 } 63 64 return 0; 65 } 66 67 static enum dpmac_eth_if dpmac_eth_if_mode(phy_interface_t if_mode) 68 { 69 switch (if_mode) { 70 case PHY_INTERFACE_MODE_RGMII: 71 case PHY_INTERFACE_MODE_RGMII_ID: 72 case PHY_INTERFACE_MODE_RGMII_RXID: 73 case PHY_INTERFACE_MODE_RGMII_TXID: 74 return DPMAC_ETH_IF_RGMII; 75 case PHY_INTERFACE_MODE_USXGMII: 76 return DPMAC_ETH_IF_USXGMII; 77 case PHY_INTERFACE_MODE_QSGMII: 78 return DPMAC_ETH_IF_QSGMII; 79 case PHY_INTERFACE_MODE_SGMII: 80 return DPMAC_ETH_IF_SGMII; 81 case PHY_INTERFACE_MODE_10GBASER: 82 return DPMAC_ETH_IF_XFI; 83 case PHY_INTERFACE_MODE_1000BASEX: 84 return DPMAC_ETH_IF_1000BASEX; 85 case PHY_INTERFACE_MODE_25GBASER: 86 return DPMAC_ETH_IF_CAUI; 87 default: 88 return DPMAC_ETH_IF_MII; 89 } 90 } 91 92 static struct fwnode_handle *dpaa2_mac_get_node(struct device *dev, 93 u16 dpmac_id) 94 { 95 struct fwnode_handle *fwnode, *parent = NULL, *child = NULL; 96 struct device_node *dpmacs = NULL; 97 int err; 98 u32 id; 99 100 fwnode = dev_fwnode(dev->parent); 101 if (is_of_node(fwnode)) { 102 dpmacs = of_find_node_by_name(NULL, "dpmacs"); 103 if (!dpmacs) 104 return NULL; 105 parent = of_fwnode_handle(dpmacs); 106 } else if (is_acpi_node(fwnode)) { 107 parent = fwnode; 108 } else { 109 /* The root dprc device didn't yet get to finalize it's probe, 110 * thus the fwnode field is not yet set. Defer probe if we are 111 * facing this situation. 112 */ 113 dev_dbg(dev, "dprc not finished probing\n"); 114 return ERR_PTR(-EPROBE_DEFER); 115 } 116 117 fwnode_for_each_child_node(parent, child) { 118 err = -EINVAL; 119 if (is_acpi_device_node(child)) 120 err = acpi_get_local_address(ACPI_HANDLE_FWNODE(child), &id); 121 else if (is_of_node(child)) 122 err = of_property_read_u32(to_of_node(child), "reg", &id); 123 if (err) 124 continue; 125 126 if (id == dpmac_id) { 127 of_node_put(dpmacs); 128 return child; 129 } 130 } 131 of_node_put(dpmacs); 132 return NULL; 133 } 134 135 static int dpaa2_mac_get_if_mode(struct fwnode_handle *dpmac_node, 136 struct dpmac_attr attr) 137 { 138 phy_interface_t if_mode; 139 int err; 140 141 err = fwnode_get_phy_mode(dpmac_node); 142 if (err > 0) 143 return err; 144 145 err = phy_mode(attr.eth_if, &if_mode); 146 if (!err) 147 return if_mode; 148 149 return err; 150 } 151 152 static struct phylink_pcs *dpaa2_mac_select_pcs(struct phylink_config *config, 153 phy_interface_t interface) 154 { 155 struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config); 156 157 return mac->pcs; 158 } 159 160 static void dpaa2_mac_config(struct phylink_config *config, unsigned int mode, 161 const struct phylink_link_state *state) 162 { 163 struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config); 164 struct dpmac_link_state *dpmac_state = &mac->state; 165 int err; 166 167 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 168 state->advertising)) 169 dpmac_state->options |= DPMAC_LINK_OPT_AUTONEG; 170 else 171 dpmac_state->options &= ~DPMAC_LINK_OPT_AUTONEG; 172 173 err = dpmac_set_link_state(mac->mc_io, 0, 174 mac->mc_dev->mc_handle, dpmac_state); 175 if (err) 176 netdev_err(mac->net_dev, "%s: dpmac_set_link_state() = %d\n", 177 __func__, err); 178 179 if (!mac->serdes_phy) 180 return; 181 182 /* This happens only if we support changing of protocol at runtime */ 183 err = dpmac_set_protocol(mac->mc_io, 0, mac->mc_dev->mc_handle, 184 dpmac_eth_if_mode(state->interface)); 185 if (err) 186 netdev_err(mac->net_dev, "dpmac_set_protocol() = %d\n", err); 187 188 err = phy_set_mode_ext(mac->serdes_phy, PHY_MODE_ETHERNET, state->interface); 189 if (err) 190 netdev_err(mac->net_dev, "phy_set_mode_ext() = %d\n", err); 191 } 192 193 static void dpaa2_mac_link_up(struct phylink_config *config, 194 struct phy_device *phy, 195 unsigned int mode, phy_interface_t interface, 196 int speed, int duplex, 197 bool tx_pause, bool rx_pause) 198 { 199 struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config); 200 struct dpmac_link_state *dpmac_state = &mac->state; 201 int err; 202 203 dpmac_state->up = 1; 204 205 dpmac_state->rate = speed; 206 207 if (duplex == DUPLEX_HALF) 208 dpmac_state->options |= DPMAC_LINK_OPT_HALF_DUPLEX; 209 else if (duplex == DUPLEX_FULL) 210 dpmac_state->options &= ~DPMAC_LINK_OPT_HALF_DUPLEX; 211 212 if (rx_pause) 213 dpmac_state->options |= DPMAC_LINK_OPT_PAUSE; 214 else 215 dpmac_state->options &= ~DPMAC_LINK_OPT_PAUSE; 216 217 if (rx_pause ^ tx_pause) 218 dpmac_state->options |= DPMAC_LINK_OPT_ASYM_PAUSE; 219 else 220 dpmac_state->options &= ~DPMAC_LINK_OPT_ASYM_PAUSE; 221 222 err = dpmac_set_link_state(mac->mc_io, 0, 223 mac->mc_dev->mc_handle, dpmac_state); 224 if (err) 225 netdev_err(mac->net_dev, "%s: dpmac_set_link_state() = %d\n", 226 __func__, err); 227 } 228 229 static void dpaa2_mac_link_down(struct phylink_config *config, 230 unsigned int mode, 231 phy_interface_t interface) 232 { 233 struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config); 234 struct dpmac_link_state *dpmac_state = &mac->state; 235 int err; 236 237 dpmac_state->up = 0; 238 err = dpmac_set_link_state(mac->mc_io, 0, 239 mac->mc_dev->mc_handle, dpmac_state); 240 if (err) 241 netdev_err(mac->net_dev, "dpmac_set_link_state() = %d\n", err); 242 } 243 244 static const struct phylink_mac_ops dpaa2_mac_phylink_ops = { 245 .mac_select_pcs = dpaa2_mac_select_pcs, 246 .mac_config = dpaa2_mac_config, 247 .mac_link_up = dpaa2_mac_link_up, 248 .mac_link_down = dpaa2_mac_link_down, 249 }; 250 251 static int dpaa2_pcs_create(struct dpaa2_mac *mac, 252 struct fwnode_handle *dpmac_node, 253 int id) 254 { 255 struct fwnode_handle *node; 256 struct phylink_pcs *pcs; 257 258 node = fwnode_find_reference(dpmac_node, "pcs-handle", 0); 259 if (IS_ERR(node)) { 260 /* do not error out on old DTS files */ 261 netdev_warn(mac->net_dev, "pcs-handle node not found\n"); 262 return 0; 263 } 264 265 pcs = lynx_pcs_create_fwnode(node); 266 fwnode_handle_put(node); 267 268 if (pcs == ERR_PTR(-EPROBE_DEFER)) { 269 netdev_dbg(mac->net_dev, "missing PCS device\n"); 270 return -EPROBE_DEFER; 271 } 272 273 if (pcs == ERR_PTR(-ENODEV)) { 274 netdev_err(mac->net_dev, "pcs-handle node not available\n"); 275 return PTR_ERR(pcs); 276 } 277 278 if (IS_ERR(pcs)) { 279 netdev_err(mac->net_dev, 280 "lynx_pcs_create_fwnode() failed: %pe\n", pcs); 281 return PTR_ERR(pcs); 282 } 283 284 mac->pcs = pcs; 285 286 return 0; 287 } 288 289 static void dpaa2_pcs_destroy(struct dpaa2_mac *mac) 290 { 291 struct phylink_pcs *phylink_pcs = mac->pcs; 292 293 if (phylink_pcs) { 294 lynx_pcs_destroy(phylink_pcs); 295 mac->pcs = NULL; 296 } 297 } 298 299 static void dpaa2_mac_set_supported_interfaces(struct dpaa2_mac *mac) 300 { 301 int intf, err; 302 303 /* We support the current interface mode, and if we have a PCS 304 * similar interface modes that do not require the SerDes lane to be 305 * reconfigured. 306 */ 307 __set_bit(mac->if_mode, mac->phylink_config.supported_interfaces); 308 if (mac->pcs) { 309 switch (mac->if_mode) { 310 case PHY_INTERFACE_MODE_1000BASEX: 311 case PHY_INTERFACE_MODE_SGMII: 312 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 313 mac->phylink_config.supported_interfaces); 314 __set_bit(PHY_INTERFACE_MODE_SGMII, 315 mac->phylink_config.supported_interfaces); 316 break; 317 318 default: 319 break; 320 } 321 } 322 323 if (!mac->serdes_phy) 324 return; 325 326 /* In case we have access to the SerDes phy/lane, then ask the SerDes 327 * driver what interfaces are supported based on the current PLL 328 * configuration. 329 */ 330 for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) { 331 if (intf == PHY_INTERFACE_MODE_NA) 332 continue; 333 334 err = phy_validate(mac->serdes_phy, PHY_MODE_ETHERNET, intf, NULL); 335 if (err) 336 continue; 337 338 __set_bit(intf, mac->phylink_config.supported_interfaces); 339 } 340 } 341 342 void dpaa2_mac_start(struct dpaa2_mac *mac) 343 { 344 ASSERT_RTNL(); 345 346 if (mac->serdes_phy) 347 phy_power_on(mac->serdes_phy); 348 349 phylink_start(mac->phylink); 350 } 351 352 void dpaa2_mac_stop(struct dpaa2_mac *mac) 353 { 354 ASSERT_RTNL(); 355 356 phylink_stop(mac->phylink); 357 358 if (mac->serdes_phy) 359 phy_power_off(mac->serdes_phy); 360 } 361 362 int dpaa2_mac_connect(struct dpaa2_mac *mac) 363 { 364 struct net_device *net_dev = mac->net_dev; 365 struct fwnode_handle *dpmac_node; 366 struct phy *serdes_phy = NULL; 367 struct phylink *phylink; 368 int err; 369 370 mac->if_link_type = mac->attr.link_type; 371 372 dpmac_node = mac->fw_node; 373 if (!dpmac_node) { 374 netdev_err(net_dev, "No dpmac@%d node found.\n", mac->attr.id); 375 return -ENODEV; 376 } 377 378 err = dpaa2_mac_get_if_mode(dpmac_node, mac->attr); 379 if (err < 0) 380 return -EINVAL; 381 mac->if_mode = err; 382 383 if (mac->features & DPAA2_MAC_FEATURE_PROTOCOL_CHANGE && 384 !phy_interface_mode_is_rgmii(mac->if_mode) && 385 is_of_node(dpmac_node)) { 386 serdes_phy = of_phy_get(to_of_node(dpmac_node), NULL); 387 388 if (serdes_phy == ERR_PTR(-ENODEV)) 389 serdes_phy = NULL; 390 else if (IS_ERR(serdes_phy)) 391 return PTR_ERR(serdes_phy); 392 else 393 phy_init(serdes_phy); 394 } 395 mac->serdes_phy = serdes_phy; 396 397 /* The MAC does not have the capability to add RGMII delays so 398 * error out if the interface mode requests them and there is no PHY 399 * to act upon them 400 */ 401 if (of_phy_is_fixed_link(to_of_node(dpmac_node)) && 402 (mac->if_mode == PHY_INTERFACE_MODE_RGMII_ID || 403 mac->if_mode == PHY_INTERFACE_MODE_RGMII_RXID || 404 mac->if_mode == PHY_INTERFACE_MODE_RGMII_TXID)) { 405 netdev_err(net_dev, "RGMII delay not supported\n"); 406 return -EINVAL; 407 } 408 409 if ((mac->attr.link_type == DPMAC_LINK_TYPE_PHY && 410 mac->attr.eth_if != DPMAC_ETH_IF_RGMII) || 411 mac->attr.link_type == DPMAC_LINK_TYPE_BACKPLANE) { 412 err = dpaa2_pcs_create(mac, dpmac_node, mac->attr.id); 413 if (err) 414 return err; 415 } 416 417 memset(&mac->phylink_config, 0, sizeof(mac->phylink_config)); 418 mac->phylink_config.dev = &net_dev->dev; 419 mac->phylink_config.type = PHYLINK_NETDEV; 420 421 mac->phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_ASYM_PAUSE | 422 MAC_10FD | MAC_100FD | MAC_1000FD | MAC_2500FD | MAC_5000FD | 423 MAC_10000FD | MAC_25000FD; 424 425 dpaa2_mac_set_supported_interfaces(mac); 426 427 phylink = phylink_create(&mac->phylink_config, 428 dpmac_node, mac->if_mode, 429 &dpaa2_mac_phylink_ops); 430 if (IS_ERR(phylink)) { 431 err = PTR_ERR(phylink); 432 goto err_pcs_destroy; 433 } 434 mac->phylink = phylink; 435 436 rtnl_lock(); 437 err = phylink_fwnode_phy_connect(mac->phylink, dpmac_node, 0); 438 rtnl_unlock(); 439 if (err) { 440 netdev_err(net_dev, "phylink_fwnode_phy_connect() = %d\n", err); 441 goto err_phylink_destroy; 442 } 443 444 return 0; 445 446 err_phylink_destroy: 447 phylink_destroy(mac->phylink); 448 err_pcs_destroy: 449 dpaa2_pcs_destroy(mac); 450 451 return err; 452 } 453 454 void dpaa2_mac_disconnect(struct dpaa2_mac *mac) 455 { 456 rtnl_lock(); 457 phylink_disconnect_phy(mac->phylink); 458 rtnl_unlock(); 459 460 phylink_destroy(mac->phylink); 461 dpaa2_pcs_destroy(mac); 462 of_phy_put(mac->serdes_phy); 463 mac->serdes_phy = NULL; 464 } 465 466 int dpaa2_mac_open(struct dpaa2_mac *mac) 467 { 468 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 469 struct net_device *net_dev = mac->net_dev; 470 struct fwnode_handle *fw_node; 471 int err; 472 473 err = dpmac_open(mac->mc_io, 0, dpmac_dev->obj_desc.id, 474 &dpmac_dev->mc_handle); 475 if (err || !dpmac_dev->mc_handle) { 476 netdev_err(net_dev, "dpmac_open() = %d\n", err); 477 return -ENODEV; 478 } 479 480 err = dpmac_get_attributes(mac->mc_io, 0, dpmac_dev->mc_handle, 481 &mac->attr); 482 if (err) { 483 netdev_err(net_dev, "dpmac_get_attributes() = %d\n", err); 484 goto err_close_dpmac; 485 } 486 487 err = dpmac_get_api_version(mac->mc_io, 0, &mac->ver_major, &mac->ver_minor); 488 if (err) { 489 netdev_err(net_dev, "dpmac_get_api_version() = %d\n", err); 490 goto err_close_dpmac; 491 } 492 493 dpaa2_mac_detect_features(mac); 494 495 /* Find the device node representing the MAC device and link the device 496 * behind the associated netdev to it. 497 */ 498 fw_node = dpaa2_mac_get_node(&mac->mc_dev->dev, mac->attr.id); 499 if (IS_ERR(fw_node)) { 500 err = PTR_ERR(fw_node); 501 goto err_close_dpmac; 502 } 503 504 mac->fw_node = fw_node; 505 net_dev->dev.of_node = to_of_node(mac->fw_node); 506 507 return 0; 508 509 err_close_dpmac: 510 dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle); 511 return err; 512 } 513 514 void dpaa2_mac_close(struct dpaa2_mac *mac) 515 { 516 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 517 518 dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle); 519 if (mac->fw_node) 520 fwnode_handle_put(mac->fw_node); 521 } 522 523 static char dpaa2_mac_ethtool_stats[][ETH_GSTRING_LEN] = { 524 [DPMAC_CNT_ING_ALL_FRAME] = "[mac] rx all frames", 525 [DPMAC_CNT_ING_GOOD_FRAME] = "[mac] rx frames ok", 526 [DPMAC_CNT_ING_ERR_FRAME] = "[mac] rx frame errors", 527 [DPMAC_CNT_ING_FRAME_DISCARD] = "[mac] rx frame discards", 528 [DPMAC_CNT_ING_UCAST_FRAME] = "[mac] rx u-cast", 529 [DPMAC_CNT_ING_BCAST_FRAME] = "[mac] rx b-cast", 530 [DPMAC_CNT_ING_MCAST_FRAME] = "[mac] rx m-cast", 531 [DPMAC_CNT_ING_FRAME_64] = "[mac] rx 64 bytes", 532 [DPMAC_CNT_ING_FRAME_127] = "[mac] rx 65-127 bytes", 533 [DPMAC_CNT_ING_FRAME_255] = "[mac] rx 128-255 bytes", 534 [DPMAC_CNT_ING_FRAME_511] = "[mac] rx 256-511 bytes", 535 [DPMAC_CNT_ING_FRAME_1023] = "[mac] rx 512-1023 bytes", 536 [DPMAC_CNT_ING_FRAME_1518] = "[mac] rx 1024-1518 bytes", 537 [DPMAC_CNT_ING_FRAME_1519_MAX] = "[mac] rx 1519-max bytes", 538 [DPMAC_CNT_ING_FRAG] = "[mac] rx frags", 539 [DPMAC_CNT_ING_JABBER] = "[mac] rx jabber", 540 [DPMAC_CNT_ING_ALIGN_ERR] = "[mac] rx align errors", 541 [DPMAC_CNT_ING_OVERSIZED] = "[mac] rx oversized", 542 [DPMAC_CNT_ING_VALID_PAUSE_FRAME] = "[mac] rx pause", 543 [DPMAC_CNT_ING_BYTE] = "[mac] rx bytes", 544 [DPMAC_CNT_EGR_GOOD_FRAME] = "[mac] tx frames ok", 545 [DPMAC_CNT_EGR_UCAST_FRAME] = "[mac] tx u-cast", 546 [DPMAC_CNT_EGR_MCAST_FRAME] = "[mac] tx m-cast", 547 [DPMAC_CNT_EGR_BCAST_FRAME] = "[mac] tx b-cast", 548 [DPMAC_CNT_EGR_ERR_FRAME] = "[mac] tx frame errors", 549 [DPMAC_CNT_EGR_UNDERSIZED] = "[mac] tx undersized", 550 [DPMAC_CNT_EGR_VALID_PAUSE_FRAME] = "[mac] tx b-pause", 551 [DPMAC_CNT_EGR_BYTE] = "[mac] tx bytes", 552 }; 553 554 #define DPAA2_MAC_NUM_STATS ARRAY_SIZE(dpaa2_mac_ethtool_stats) 555 556 int dpaa2_mac_get_sset_count(void) 557 { 558 return DPAA2_MAC_NUM_STATS; 559 } 560 561 void dpaa2_mac_get_strings(u8 *data) 562 { 563 u8 *p = data; 564 int i; 565 566 for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) { 567 strscpy(p, dpaa2_mac_ethtool_stats[i], ETH_GSTRING_LEN); 568 p += ETH_GSTRING_LEN; 569 } 570 } 571 572 void dpaa2_mac_get_ethtool_stats(struct dpaa2_mac *mac, u64 *data) 573 { 574 struct fsl_mc_device *dpmac_dev = mac->mc_dev; 575 int i, err; 576 u64 value; 577 578 for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) { 579 err = dpmac_get_counter(mac->mc_io, 0, dpmac_dev->mc_handle, 580 i, &value); 581 if (err) { 582 netdev_err_once(mac->net_dev, 583 "dpmac_get_counter error %d\n", err); 584 *(data + i) = U64_MAX; 585 continue; 586 } 587 *(data + i) = value; 588 } 589 } 590