1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Copyright (C) 2009-2016 John Crispin <blogic@openwrt.org> 5 * Copyright (C) 2009-2016 Felix Fietkau <nbd@openwrt.org> 6 * Copyright (C) 2013-2016 Michael Lee <igvtee@gmail.com> 7 */ 8 9 #include <linux/of_device.h> 10 #include <linux/of_mdio.h> 11 #include <linux/of_net.h> 12 #include <linux/mfd/syscon.h> 13 #include <linux/regmap.h> 14 #include <linux/clk.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/if_vlan.h> 17 #include <linux/reset.h> 18 #include <linux/tcp.h> 19 #include <linux/interrupt.h> 20 #include <linux/pinctrl/devinfo.h> 21 #include <linux/phylink.h> 22 23 #include "mtk_eth_soc.h" 24 25 static int mtk_msg_level = -1; 26 module_param_named(msg_level, mtk_msg_level, int, 0); 27 MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)"); 28 29 #define MTK_ETHTOOL_STAT(x) { #x, \ 30 offsetof(struct mtk_hw_stats, x) / sizeof(u64) } 31 32 /* strings used by ethtool */ 33 static const struct mtk_ethtool_stats { 34 char str[ETH_GSTRING_LEN]; 35 u32 offset; 36 } mtk_ethtool_stats[] = { 37 MTK_ETHTOOL_STAT(tx_bytes), 38 MTK_ETHTOOL_STAT(tx_packets), 39 MTK_ETHTOOL_STAT(tx_skip), 40 MTK_ETHTOOL_STAT(tx_collisions), 41 MTK_ETHTOOL_STAT(rx_bytes), 42 MTK_ETHTOOL_STAT(rx_packets), 43 MTK_ETHTOOL_STAT(rx_overflow), 44 MTK_ETHTOOL_STAT(rx_fcs_errors), 45 MTK_ETHTOOL_STAT(rx_short_errors), 46 MTK_ETHTOOL_STAT(rx_long_errors), 47 MTK_ETHTOOL_STAT(rx_checksum_errors), 48 MTK_ETHTOOL_STAT(rx_flow_control_packets), 49 }; 50 51 static const char * const mtk_clks_source_name[] = { 52 "ethif", "sgmiitop", "esw", "gp0", "gp1", "gp2", "fe", "trgpll", 53 "sgmii_tx250m", "sgmii_rx250m", "sgmii_cdr_ref", "sgmii_cdr_fb", 54 "sgmii2_tx250m", "sgmii2_rx250m", "sgmii2_cdr_ref", "sgmii2_cdr_fb", 55 "sgmii_ck", "eth2pll", 56 }; 57 58 void mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg) 59 { 60 __raw_writel(val, eth->base + reg); 61 } 62 63 u32 mtk_r32(struct mtk_eth *eth, unsigned reg) 64 { 65 return __raw_readl(eth->base + reg); 66 } 67 68 u32 mtk_m32(struct mtk_eth *eth, u32 mask, u32 set, unsigned reg) 69 { 70 u32 val; 71 72 val = mtk_r32(eth, reg); 73 val &= ~mask; 74 val |= set; 75 mtk_w32(eth, val, reg); 76 return reg; 77 } 78 79 static int mtk_mdio_busy_wait(struct mtk_eth *eth) 80 { 81 unsigned long t_start = jiffies; 82 83 while (1) { 84 if (!(mtk_r32(eth, MTK_PHY_IAC) & PHY_IAC_ACCESS)) 85 return 0; 86 if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT)) 87 break; 88 usleep_range(10, 20); 89 } 90 91 dev_err(eth->dev, "mdio: MDIO timeout\n"); 92 return -1; 93 } 94 95 static u32 _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, 96 u32 phy_register, u32 write_data) 97 { 98 if (mtk_mdio_busy_wait(eth)) 99 return -1; 100 101 write_data &= 0xffff; 102 103 mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE | 104 (phy_register << PHY_IAC_REG_SHIFT) | 105 (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data, 106 MTK_PHY_IAC); 107 108 if (mtk_mdio_busy_wait(eth)) 109 return -1; 110 111 return 0; 112 } 113 114 static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg) 115 { 116 u32 d; 117 118 if (mtk_mdio_busy_wait(eth)) 119 return 0xffff; 120 121 mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ | 122 (phy_reg << PHY_IAC_REG_SHIFT) | 123 (phy_addr << PHY_IAC_ADDR_SHIFT), 124 MTK_PHY_IAC); 125 126 if (mtk_mdio_busy_wait(eth)) 127 return 0xffff; 128 129 d = mtk_r32(eth, MTK_PHY_IAC) & 0xffff; 130 131 return d; 132 } 133 134 static int mtk_mdio_write(struct mii_bus *bus, int phy_addr, 135 int phy_reg, u16 val) 136 { 137 struct mtk_eth *eth = bus->priv; 138 139 return _mtk_mdio_write(eth, phy_addr, phy_reg, val); 140 } 141 142 static int mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg) 143 { 144 struct mtk_eth *eth = bus->priv; 145 146 return _mtk_mdio_read(eth, phy_addr, phy_reg); 147 } 148 149 static int mt7621_gmac0_rgmii_adjust(struct mtk_eth *eth, 150 phy_interface_t interface) 151 { 152 u32 val; 153 154 /* Check DDR memory type. 155 * Currently TRGMII mode with DDR2 memory is not supported. 156 */ 157 regmap_read(eth->ethsys, ETHSYS_SYSCFG, &val); 158 if (interface == PHY_INTERFACE_MODE_TRGMII && 159 val & SYSCFG_DRAM_TYPE_DDR2) { 160 dev_err(eth->dev, 161 "TRGMII mode with DDR2 memory is not supported!\n"); 162 return -EOPNOTSUPP; 163 } 164 165 val = (interface == PHY_INTERFACE_MODE_TRGMII) ? 166 ETHSYS_TRGMII_MT7621_DDR_PLL : 0; 167 168 regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0, 169 ETHSYS_TRGMII_MT7621_MASK, val); 170 171 return 0; 172 } 173 174 static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth, int speed) 175 { 176 u32 val; 177 int ret; 178 179 val = (speed == SPEED_1000) ? 180 INTF_MODE_RGMII_1000 : INTF_MODE_RGMII_10_100; 181 mtk_w32(eth, val, INTF_MODE); 182 183 regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0, 184 ETHSYS_TRGMII_CLK_SEL362_5, 185 ETHSYS_TRGMII_CLK_SEL362_5); 186 187 val = (speed == SPEED_1000) ? 250000000 : 500000000; 188 ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val); 189 if (ret) 190 dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret); 191 192 val = (speed == SPEED_1000) ? 193 RCK_CTRL_RGMII_1000 : RCK_CTRL_RGMII_10_100; 194 mtk_w32(eth, val, TRGMII_RCK_CTRL); 195 196 val = (speed == SPEED_1000) ? 197 TCK_CTRL_RGMII_1000 : TCK_CTRL_RGMII_10_100; 198 mtk_w32(eth, val, TRGMII_TCK_CTRL); 199 } 200 201 static void mtk_mac_config(struct phylink_config *config, unsigned int mode, 202 const struct phylink_link_state *state) 203 { 204 struct mtk_mac *mac = container_of(config, struct mtk_mac, 205 phylink_config); 206 struct mtk_eth *eth = mac->hw; 207 u32 mcr_cur, mcr_new, sid, i; 208 int val, ge_mode, err; 209 210 /* MT76x8 has no hardware settings between for the MAC */ 211 if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628) && 212 mac->interface != state->interface) { 213 /* Setup soc pin functions */ 214 switch (state->interface) { 215 case PHY_INTERFACE_MODE_TRGMII: 216 if (mac->id) 217 goto err_phy; 218 if (!MTK_HAS_CAPS(mac->hw->soc->caps, 219 MTK_GMAC1_TRGMII)) 220 goto err_phy; 221 /* fall through */ 222 case PHY_INTERFACE_MODE_RGMII_TXID: 223 case PHY_INTERFACE_MODE_RGMII_RXID: 224 case PHY_INTERFACE_MODE_RGMII_ID: 225 case PHY_INTERFACE_MODE_RGMII: 226 case PHY_INTERFACE_MODE_MII: 227 case PHY_INTERFACE_MODE_REVMII: 228 case PHY_INTERFACE_MODE_RMII: 229 if (MTK_HAS_CAPS(eth->soc->caps, MTK_RGMII)) { 230 err = mtk_gmac_rgmii_path_setup(eth, mac->id); 231 if (err) 232 goto init_err; 233 } 234 break; 235 case PHY_INTERFACE_MODE_1000BASEX: 236 case PHY_INTERFACE_MODE_2500BASEX: 237 case PHY_INTERFACE_MODE_SGMII: 238 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) { 239 err = mtk_gmac_sgmii_path_setup(eth, mac->id); 240 if (err) 241 goto init_err; 242 } 243 break; 244 case PHY_INTERFACE_MODE_GMII: 245 if (MTK_HAS_CAPS(eth->soc->caps, MTK_GEPHY)) { 246 err = mtk_gmac_gephy_path_setup(eth, mac->id); 247 if (err) 248 goto init_err; 249 } 250 break; 251 default: 252 goto err_phy; 253 } 254 255 /* Setup clock for 1st gmac */ 256 if (!mac->id && state->interface != PHY_INTERFACE_MODE_SGMII && 257 !phy_interface_mode_is_8023z(state->interface) && 258 MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GMAC1_TRGMII)) { 259 if (MTK_HAS_CAPS(mac->hw->soc->caps, 260 MTK_TRGMII_MT7621_CLK)) { 261 if (mt7621_gmac0_rgmii_adjust(mac->hw, 262 state->interface)) 263 goto err_phy; 264 } else { 265 if (state->interface != 266 PHY_INTERFACE_MODE_TRGMII) 267 mtk_gmac0_rgmii_adjust(mac->hw, 268 state->speed); 269 270 /* mt7623_pad_clk_setup */ 271 for (i = 0 ; i < NUM_TRGMII_CTRL; i++) 272 mtk_w32(mac->hw, 273 TD_DM_DRVP(8) | TD_DM_DRVN(8), 274 TRGMII_TD_ODT(i)); 275 276 /* Assert/release MT7623 RXC reset */ 277 mtk_m32(mac->hw, 0, RXC_RST | RXC_DQSISEL, 278 TRGMII_RCK_CTRL); 279 mtk_m32(mac->hw, RXC_RST, 0, TRGMII_RCK_CTRL); 280 } 281 } 282 283 ge_mode = 0; 284 switch (state->interface) { 285 case PHY_INTERFACE_MODE_MII: 286 case PHY_INTERFACE_MODE_GMII: 287 ge_mode = 1; 288 break; 289 case PHY_INTERFACE_MODE_REVMII: 290 ge_mode = 2; 291 break; 292 case PHY_INTERFACE_MODE_RMII: 293 if (mac->id) 294 goto err_phy; 295 ge_mode = 3; 296 break; 297 default: 298 break; 299 } 300 301 /* put the gmac into the right mode */ 302 regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); 303 val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, mac->id); 304 val |= SYSCFG0_GE_MODE(ge_mode, mac->id); 305 regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); 306 307 mac->interface = state->interface; 308 } 309 310 /* SGMII */ 311 if (state->interface == PHY_INTERFACE_MODE_SGMII || 312 phy_interface_mode_is_8023z(state->interface)) { 313 /* The path GMAC to SGMII will be enabled once the SGMIISYS is 314 * being setup done. 315 */ 316 regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); 317 318 regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0, 319 SYSCFG0_SGMII_MASK, 320 ~(u32)SYSCFG0_SGMII_MASK); 321 322 /* Decide how GMAC and SGMIISYS be mapped */ 323 sid = (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_SGMII)) ? 324 0 : mac->id; 325 326 /* Setup SGMIISYS with the determined property */ 327 if (state->interface != PHY_INTERFACE_MODE_SGMII) 328 err = mtk_sgmii_setup_mode_force(eth->sgmii, sid, 329 state); 330 else if (phylink_autoneg_inband(mode)) 331 err = mtk_sgmii_setup_mode_an(eth->sgmii, sid); 332 333 if (err) 334 goto init_err; 335 336 regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0, 337 SYSCFG0_SGMII_MASK, val); 338 } else if (phylink_autoneg_inband(mode)) { 339 dev_err(eth->dev, 340 "In-band mode not supported in non SGMII mode!\n"); 341 return; 342 } 343 344 /* Setup gmac */ 345 mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); 346 mcr_new = mcr_cur; 347 mcr_new &= ~(MAC_MCR_SPEED_100 | MAC_MCR_SPEED_1000 | 348 MAC_MCR_FORCE_DPX | MAC_MCR_FORCE_TX_FC | 349 MAC_MCR_FORCE_RX_FC); 350 mcr_new |= MAC_MCR_MAX_RX_1536 | MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE | 351 MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK; 352 353 switch (state->speed) { 354 case SPEED_2500: 355 case SPEED_1000: 356 mcr_new |= MAC_MCR_SPEED_1000; 357 break; 358 case SPEED_100: 359 mcr_new |= MAC_MCR_SPEED_100; 360 break; 361 } 362 if (state->duplex == DUPLEX_FULL) { 363 mcr_new |= MAC_MCR_FORCE_DPX; 364 if (state->pause & MLO_PAUSE_TX) 365 mcr_new |= MAC_MCR_FORCE_TX_FC; 366 if (state->pause & MLO_PAUSE_RX) 367 mcr_new |= MAC_MCR_FORCE_RX_FC; 368 } 369 370 /* Only update control register when needed! */ 371 if (mcr_new != mcr_cur) 372 mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id)); 373 374 return; 375 376 err_phy: 377 dev_err(eth->dev, "%s: GMAC%d mode %s not supported!\n", __func__, 378 mac->id, phy_modes(state->interface)); 379 return; 380 381 init_err: 382 dev_err(eth->dev, "%s: GMAC%d mode %s err: %d!\n", __func__, 383 mac->id, phy_modes(state->interface), err); 384 } 385 386 static void mtk_mac_pcs_get_state(struct phylink_config *config, 387 struct phylink_link_state *state) 388 { 389 struct mtk_mac *mac = container_of(config, struct mtk_mac, 390 phylink_config); 391 u32 pmsr = mtk_r32(mac->hw, MTK_MAC_MSR(mac->id)); 392 393 state->link = (pmsr & MAC_MSR_LINK); 394 state->duplex = (pmsr & MAC_MSR_DPX) >> 1; 395 396 switch (pmsr & (MAC_MSR_SPEED_1000 | MAC_MSR_SPEED_100)) { 397 case 0: 398 state->speed = SPEED_10; 399 break; 400 case MAC_MSR_SPEED_100: 401 state->speed = SPEED_100; 402 break; 403 case MAC_MSR_SPEED_1000: 404 state->speed = SPEED_1000; 405 break; 406 default: 407 state->speed = SPEED_UNKNOWN; 408 break; 409 } 410 411 state->pause &= (MLO_PAUSE_RX | MLO_PAUSE_TX); 412 if (pmsr & MAC_MSR_RX_FC) 413 state->pause |= MLO_PAUSE_RX; 414 if (pmsr & MAC_MSR_TX_FC) 415 state->pause |= MLO_PAUSE_TX; 416 } 417 418 static void mtk_mac_an_restart(struct phylink_config *config) 419 { 420 struct mtk_mac *mac = container_of(config, struct mtk_mac, 421 phylink_config); 422 423 mtk_sgmii_restart_an(mac->hw, mac->id); 424 } 425 426 static void mtk_mac_link_down(struct phylink_config *config, unsigned int mode, 427 phy_interface_t interface) 428 { 429 struct mtk_mac *mac = container_of(config, struct mtk_mac, 430 phylink_config); 431 u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); 432 433 mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN); 434 mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id)); 435 } 436 437 static void mtk_mac_link_up(struct phylink_config *config, 438 struct phy_device *phy, 439 unsigned int mode, phy_interface_t interface, 440 int speed, int duplex, bool tx_pause, bool rx_pause) 441 { 442 struct mtk_mac *mac = container_of(config, struct mtk_mac, 443 phylink_config); 444 u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); 445 446 mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN; 447 mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id)); 448 } 449 450 static void mtk_validate(struct phylink_config *config, 451 unsigned long *supported, 452 struct phylink_link_state *state) 453 { 454 struct mtk_mac *mac = container_of(config, struct mtk_mac, 455 phylink_config); 456 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 457 458 if (state->interface != PHY_INTERFACE_MODE_NA && 459 state->interface != PHY_INTERFACE_MODE_MII && 460 state->interface != PHY_INTERFACE_MODE_GMII && 461 !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_RGMII) && 462 phy_interface_mode_is_rgmii(state->interface)) && 463 !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_TRGMII) && 464 !mac->id && state->interface == PHY_INTERFACE_MODE_TRGMII) && 465 !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_SGMII) && 466 (state->interface == PHY_INTERFACE_MODE_SGMII || 467 phy_interface_mode_is_8023z(state->interface)))) { 468 linkmode_zero(supported); 469 return; 470 } 471 472 phylink_set_port_modes(mask); 473 phylink_set(mask, Autoneg); 474 475 switch (state->interface) { 476 case PHY_INTERFACE_MODE_TRGMII: 477 phylink_set(mask, 1000baseT_Full); 478 break; 479 case PHY_INTERFACE_MODE_1000BASEX: 480 case PHY_INTERFACE_MODE_2500BASEX: 481 phylink_set(mask, 1000baseX_Full); 482 phylink_set(mask, 2500baseX_Full); 483 break; 484 case PHY_INTERFACE_MODE_GMII: 485 case PHY_INTERFACE_MODE_RGMII: 486 case PHY_INTERFACE_MODE_RGMII_ID: 487 case PHY_INTERFACE_MODE_RGMII_RXID: 488 case PHY_INTERFACE_MODE_RGMII_TXID: 489 phylink_set(mask, 1000baseT_Half); 490 /* fall through */ 491 case PHY_INTERFACE_MODE_SGMII: 492 phylink_set(mask, 1000baseT_Full); 493 phylink_set(mask, 1000baseX_Full); 494 /* fall through */ 495 case PHY_INTERFACE_MODE_MII: 496 case PHY_INTERFACE_MODE_RMII: 497 case PHY_INTERFACE_MODE_REVMII: 498 case PHY_INTERFACE_MODE_NA: 499 default: 500 phylink_set(mask, 10baseT_Half); 501 phylink_set(mask, 10baseT_Full); 502 phylink_set(mask, 100baseT_Half); 503 phylink_set(mask, 100baseT_Full); 504 break; 505 } 506 507 if (state->interface == PHY_INTERFACE_MODE_NA) { 508 if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_SGMII)) { 509 phylink_set(mask, 1000baseT_Full); 510 phylink_set(mask, 1000baseX_Full); 511 phylink_set(mask, 2500baseX_Full); 512 } 513 if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_RGMII)) { 514 phylink_set(mask, 1000baseT_Full); 515 phylink_set(mask, 1000baseT_Half); 516 phylink_set(mask, 1000baseX_Full); 517 } 518 if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GEPHY)) { 519 phylink_set(mask, 1000baseT_Full); 520 phylink_set(mask, 1000baseT_Half); 521 } 522 } 523 524 phylink_set(mask, Pause); 525 phylink_set(mask, Asym_Pause); 526 527 linkmode_and(supported, supported, mask); 528 linkmode_and(state->advertising, state->advertising, mask); 529 530 /* We can only operate at 2500BaseX or 1000BaseX. If requested 531 * to advertise both, only report advertising at 2500BaseX. 532 */ 533 phylink_helper_basex_speed(state); 534 } 535 536 static const struct phylink_mac_ops mtk_phylink_ops = { 537 .validate = mtk_validate, 538 .mac_pcs_get_state = mtk_mac_pcs_get_state, 539 .mac_an_restart = mtk_mac_an_restart, 540 .mac_config = mtk_mac_config, 541 .mac_link_down = mtk_mac_link_down, 542 .mac_link_up = mtk_mac_link_up, 543 }; 544 545 static int mtk_mdio_init(struct mtk_eth *eth) 546 { 547 struct device_node *mii_np; 548 int ret; 549 550 mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus"); 551 if (!mii_np) { 552 dev_err(eth->dev, "no %s child node found", "mdio-bus"); 553 return -ENODEV; 554 } 555 556 if (!of_device_is_available(mii_np)) { 557 ret = -ENODEV; 558 goto err_put_node; 559 } 560 561 eth->mii_bus = devm_mdiobus_alloc(eth->dev); 562 if (!eth->mii_bus) { 563 ret = -ENOMEM; 564 goto err_put_node; 565 } 566 567 eth->mii_bus->name = "mdio"; 568 eth->mii_bus->read = mtk_mdio_read; 569 eth->mii_bus->write = mtk_mdio_write; 570 eth->mii_bus->priv = eth; 571 eth->mii_bus->parent = eth->dev; 572 573 snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%pOFn", mii_np); 574 ret = of_mdiobus_register(eth->mii_bus, mii_np); 575 576 err_put_node: 577 of_node_put(mii_np); 578 return ret; 579 } 580 581 static void mtk_mdio_cleanup(struct mtk_eth *eth) 582 { 583 if (!eth->mii_bus) 584 return; 585 586 mdiobus_unregister(eth->mii_bus); 587 } 588 589 static inline void mtk_tx_irq_disable(struct mtk_eth *eth, u32 mask) 590 { 591 unsigned long flags; 592 u32 val; 593 594 spin_lock_irqsave(ð->tx_irq_lock, flags); 595 val = mtk_r32(eth, eth->tx_int_mask_reg); 596 mtk_w32(eth, val & ~mask, eth->tx_int_mask_reg); 597 spin_unlock_irqrestore(ð->tx_irq_lock, flags); 598 } 599 600 static inline void mtk_tx_irq_enable(struct mtk_eth *eth, u32 mask) 601 { 602 unsigned long flags; 603 u32 val; 604 605 spin_lock_irqsave(ð->tx_irq_lock, flags); 606 val = mtk_r32(eth, eth->tx_int_mask_reg); 607 mtk_w32(eth, val | mask, eth->tx_int_mask_reg); 608 spin_unlock_irqrestore(ð->tx_irq_lock, flags); 609 } 610 611 static inline void mtk_rx_irq_disable(struct mtk_eth *eth, u32 mask) 612 { 613 unsigned long flags; 614 u32 val; 615 616 spin_lock_irqsave(ð->rx_irq_lock, flags); 617 val = mtk_r32(eth, MTK_PDMA_INT_MASK); 618 mtk_w32(eth, val & ~mask, MTK_PDMA_INT_MASK); 619 spin_unlock_irqrestore(ð->rx_irq_lock, flags); 620 } 621 622 static inline void mtk_rx_irq_enable(struct mtk_eth *eth, u32 mask) 623 { 624 unsigned long flags; 625 u32 val; 626 627 spin_lock_irqsave(ð->rx_irq_lock, flags); 628 val = mtk_r32(eth, MTK_PDMA_INT_MASK); 629 mtk_w32(eth, val | mask, MTK_PDMA_INT_MASK); 630 spin_unlock_irqrestore(ð->rx_irq_lock, flags); 631 } 632 633 static int mtk_set_mac_address(struct net_device *dev, void *p) 634 { 635 int ret = eth_mac_addr(dev, p); 636 struct mtk_mac *mac = netdev_priv(dev); 637 struct mtk_eth *eth = mac->hw; 638 const char *macaddr = dev->dev_addr; 639 640 if (ret) 641 return ret; 642 643 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 644 return -EBUSY; 645 646 spin_lock_bh(&mac->hw->page_lock); 647 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { 648 mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1], 649 MT7628_SDM_MAC_ADRH); 650 mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) | 651 (macaddr[4] << 8) | macaddr[5], 652 MT7628_SDM_MAC_ADRL); 653 } else { 654 mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1], 655 MTK_GDMA_MAC_ADRH(mac->id)); 656 mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) | 657 (macaddr[4] << 8) | macaddr[5], 658 MTK_GDMA_MAC_ADRL(mac->id)); 659 } 660 spin_unlock_bh(&mac->hw->page_lock); 661 662 return 0; 663 } 664 665 void mtk_stats_update_mac(struct mtk_mac *mac) 666 { 667 struct mtk_hw_stats *hw_stats = mac->hw_stats; 668 unsigned int base = MTK_GDM1_TX_GBCNT; 669 u64 stats; 670 671 base += hw_stats->reg_offset; 672 673 u64_stats_update_begin(&hw_stats->syncp); 674 675 hw_stats->rx_bytes += mtk_r32(mac->hw, base); 676 stats = mtk_r32(mac->hw, base + 0x04); 677 if (stats) 678 hw_stats->rx_bytes += (stats << 32); 679 hw_stats->rx_packets += mtk_r32(mac->hw, base + 0x08); 680 hw_stats->rx_overflow += mtk_r32(mac->hw, base + 0x10); 681 hw_stats->rx_fcs_errors += mtk_r32(mac->hw, base + 0x14); 682 hw_stats->rx_short_errors += mtk_r32(mac->hw, base + 0x18); 683 hw_stats->rx_long_errors += mtk_r32(mac->hw, base + 0x1c); 684 hw_stats->rx_checksum_errors += mtk_r32(mac->hw, base + 0x20); 685 hw_stats->rx_flow_control_packets += 686 mtk_r32(mac->hw, base + 0x24); 687 hw_stats->tx_skip += mtk_r32(mac->hw, base + 0x28); 688 hw_stats->tx_collisions += mtk_r32(mac->hw, base + 0x2c); 689 hw_stats->tx_bytes += mtk_r32(mac->hw, base + 0x30); 690 stats = mtk_r32(mac->hw, base + 0x34); 691 if (stats) 692 hw_stats->tx_bytes += (stats << 32); 693 hw_stats->tx_packets += mtk_r32(mac->hw, base + 0x38); 694 u64_stats_update_end(&hw_stats->syncp); 695 } 696 697 static void mtk_stats_update(struct mtk_eth *eth) 698 { 699 int i; 700 701 for (i = 0; i < MTK_MAC_COUNT; i++) { 702 if (!eth->mac[i] || !eth->mac[i]->hw_stats) 703 continue; 704 if (spin_trylock(ð->mac[i]->hw_stats->stats_lock)) { 705 mtk_stats_update_mac(eth->mac[i]); 706 spin_unlock(ð->mac[i]->hw_stats->stats_lock); 707 } 708 } 709 } 710 711 static void mtk_get_stats64(struct net_device *dev, 712 struct rtnl_link_stats64 *storage) 713 { 714 struct mtk_mac *mac = netdev_priv(dev); 715 struct mtk_hw_stats *hw_stats = mac->hw_stats; 716 unsigned int start; 717 718 if (netif_running(dev) && netif_device_present(dev)) { 719 if (spin_trylock_bh(&hw_stats->stats_lock)) { 720 mtk_stats_update_mac(mac); 721 spin_unlock_bh(&hw_stats->stats_lock); 722 } 723 } 724 725 do { 726 start = u64_stats_fetch_begin_irq(&hw_stats->syncp); 727 storage->rx_packets = hw_stats->rx_packets; 728 storage->tx_packets = hw_stats->tx_packets; 729 storage->rx_bytes = hw_stats->rx_bytes; 730 storage->tx_bytes = hw_stats->tx_bytes; 731 storage->collisions = hw_stats->tx_collisions; 732 storage->rx_length_errors = hw_stats->rx_short_errors + 733 hw_stats->rx_long_errors; 734 storage->rx_over_errors = hw_stats->rx_overflow; 735 storage->rx_crc_errors = hw_stats->rx_fcs_errors; 736 storage->rx_errors = hw_stats->rx_checksum_errors; 737 storage->tx_aborted_errors = hw_stats->tx_skip; 738 } while (u64_stats_fetch_retry_irq(&hw_stats->syncp, start)); 739 740 storage->tx_errors = dev->stats.tx_errors; 741 storage->rx_dropped = dev->stats.rx_dropped; 742 storage->tx_dropped = dev->stats.tx_dropped; 743 } 744 745 static inline int mtk_max_frag_size(int mtu) 746 { 747 /* make sure buf_size will be at least MTK_MAX_RX_LENGTH */ 748 if (mtu + MTK_RX_ETH_HLEN < MTK_MAX_RX_LENGTH) 749 mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN; 750 751 return SKB_DATA_ALIGN(MTK_RX_HLEN + mtu) + 752 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 753 } 754 755 static inline int mtk_max_buf_size(int frag_size) 756 { 757 int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN - 758 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 759 760 WARN_ON(buf_size < MTK_MAX_RX_LENGTH); 761 762 return buf_size; 763 } 764 765 static inline void mtk_rx_get_desc(struct mtk_rx_dma *rxd, 766 struct mtk_rx_dma *dma_rxd) 767 { 768 rxd->rxd1 = READ_ONCE(dma_rxd->rxd1); 769 rxd->rxd2 = READ_ONCE(dma_rxd->rxd2); 770 rxd->rxd3 = READ_ONCE(dma_rxd->rxd3); 771 rxd->rxd4 = READ_ONCE(dma_rxd->rxd4); 772 } 773 774 /* the qdma core needs scratch memory to be setup */ 775 static int mtk_init_fq_dma(struct mtk_eth *eth) 776 { 777 dma_addr_t phy_ring_tail; 778 int cnt = MTK_DMA_SIZE; 779 dma_addr_t dma_addr; 780 int i; 781 782 eth->scratch_ring = dma_alloc_coherent(eth->dev, 783 cnt * sizeof(struct mtk_tx_dma), 784 ð->phy_scratch_ring, 785 GFP_ATOMIC); 786 if (unlikely(!eth->scratch_ring)) 787 return -ENOMEM; 788 789 eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE, 790 GFP_KERNEL); 791 if (unlikely(!eth->scratch_head)) 792 return -ENOMEM; 793 794 dma_addr = dma_map_single(eth->dev, 795 eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE, 796 DMA_FROM_DEVICE); 797 if (unlikely(dma_mapping_error(eth->dev, dma_addr))) 798 return -ENOMEM; 799 800 phy_ring_tail = eth->phy_scratch_ring + 801 (sizeof(struct mtk_tx_dma) * (cnt - 1)); 802 803 for (i = 0; i < cnt; i++) { 804 eth->scratch_ring[i].txd1 = 805 (dma_addr + (i * MTK_QDMA_PAGE_SIZE)); 806 if (i < cnt - 1) 807 eth->scratch_ring[i].txd2 = (eth->phy_scratch_ring + 808 ((i + 1) * sizeof(struct mtk_tx_dma))); 809 eth->scratch_ring[i].txd3 = TX_DMA_SDL(MTK_QDMA_PAGE_SIZE); 810 } 811 812 mtk_w32(eth, eth->phy_scratch_ring, MTK_QDMA_FQ_HEAD); 813 mtk_w32(eth, phy_ring_tail, MTK_QDMA_FQ_TAIL); 814 mtk_w32(eth, (cnt << 16) | cnt, MTK_QDMA_FQ_CNT); 815 mtk_w32(eth, MTK_QDMA_PAGE_SIZE << 16, MTK_QDMA_FQ_BLEN); 816 817 return 0; 818 } 819 820 static inline void *mtk_qdma_phys_to_virt(struct mtk_tx_ring *ring, u32 desc) 821 { 822 void *ret = ring->dma; 823 824 return ret + (desc - ring->phys); 825 } 826 827 static inline struct mtk_tx_buf *mtk_desc_to_tx_buf(struct mtk_tx_ring *ring, 828 struct mtk_tx_dma *txd) 829 { 830 int idx = txd - ring->dma; 831 832 return &ring->buf[idx]; 833 } 834 835 static struct mtk_tx_dma *qdma_to_pdma(struct mtk_tx_ring *ring, 836 struct mtk_tx_dma *dma) 837 { 838 return ring->dma_pdma - ring->dma + dma; 839 } 840 841 static int txd_to_idx(struct mtk_tx_ring *ring, struct mtk_tx_dma *dma) 842 { 843 return ((void *)dma - (void *)ring->dma) / sizeof(*dma); 844 } 845 846 static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf) 847 { 848 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 849 if (tx_buf->flags & MTK_TX_FLAGS_SINGLE0) { 850 dma_unmap_single(eth->dev, 851 dma_unmap_addr(tx_buf, dma_addr0), 852 dma_unmap_len(tx_buf, dma_len0), 853 DMA_TO_DEVICE); 854 } else if (tx_buf->flags & MTK_TX_FLAGS_PAGE0) { 855 dma_unmap_page(eth->dev, 856 dma_unmap_addr(tx_buf, dma_addr0), 857 dma_unmap_len(tx_buf, dma_len0), 858 DMA_TO_DEVICE); 859 } 860 } else { 861 if (dma_unmap_len(tx_buf, dma_len0)) { 862 dma_unmap_page(eth->dev, 863 dma_unmap_addr(tx_buf, dma_addr0), 864 dma_unmap_len(tx_buf, dma_len0), 865 DMA_TO_DEVICE); 866 } 867 868 if (dma_unmap_len(tx_buf, dma_len1)) { 869 dma_unmap_page(eth->dev, 870 dma_unmap_addr(tx_buf, dma_addr1), 871 dma_unmap_len(tx_buf, dma_len1), 872 DMA_TO_DEVICE); 873 } 874 } 875 876 tx_buf->flags = 0; 877 if (tx_buf->skb && 878 (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC)) 879 dev_kfree_skb_any(tx_buf->skb); 880 tx_buf->skb = NULL; 881 } 882 883 static void setup_tx_buf(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf, 884 struct mtk_tx_dma *txd, dma_addr_t mapped_addr, 885 size_t size, int idx) 886 { 887 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 888 dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); 889 dma_unmap_len_set(tx_buf, dma_len0, size); 890 } else { 891 if (idx & 1) { 892 txd->txd3 = mapped_addr; 893 txd->txd2 |= TX_DMA_PLEN1(size); 894 dma_unmap_addr_set(tx_buf, dma_addr1, mapped_addr); 895 dma_unmap_len_set(tx_buf, dma_len1, size); 896 } else { 897 tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC; 898 txd->txd1 = mapped_addr; 899 txd->txd2 = TX_DMA_PLEN0(size); 900 dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); 901 dma_unmap_len_set(tx_buf, dma_len0, size); 902 } 903 } 904 } 905 906 static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev, 907 int tx_num, struct mtk_tx_ring *ring, bool gso) 908 { 909 struct mtk_mac *mac = netdev_priv(dev); 910 struct mtk_eth *eth = mac->hw; 911 struct mtk_tx_dma *itxd, *txd; 912 struct mtk_tx_dma *itxd_pdma, *txd_pdma; 913 struct mtk_tx_buf *itx_buf, *tx_buf; 914 dma_addr_t mapped_addr; 915 unsigned int nr_frags; 916 int i, n_desc = 1; 917 u32 txd4 = 0, fport; 918 int k = 0; 919 920 itxd = ring->next_free; 921 itxd_pdma = qdma_to_pdma(ring, itxd); 922 if (itxd == ring->last_free) 923 return -ENOMEM; 924 925 /* set the forward port */ 926 fport = (mac->id + 1) << TX_DMA_FPORT_SHIFT; 927 txd4 |= fport; 928 929 itx_buf = mtk_desc_to_tx_buf(ring, itxd); 930 memset(itx_buf, 0, sizeof(*itx_buf)); 931 932 if (gso) 933 txd4 |= TX_DMA_TSO; 934 935 /* TX Checksum offload */ 936 if (skb->ip_summed == CHECKSUM_PARTIAL) 937 txd4 |= TX_DMA_CHKSUM; 938 939 /* VLAN header offload */ 940 if (skb_vlan_tag_present(skb)) 941 txd4 |= TX_DMA_INS_VLAN | skb_vlan_tag_get(skb); 942 943 mapped_addr = dma_map_single(eth->dev, skb->data, 944 skb_headlen(skb), DMA_TO_DEVICE); 945 if (unlikely(dma_mapping_error(eth->dev, mapped_addr))) 946 return -ENOMEM; 947 948 WRITE_ONCE(itxd->txd1, mapped_addr); 949 itx_buf->flags |= MTK_TX_FLAGS_SINGLE0; 950 itx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 : 951 MTK_TX_FLAGS_FPORT1; 952 setup_tx_buf(eth, itx_buf, itxd_pdma, mapped_addr, skb_headlen(skb), 953 k++); 954 955 /* TX SG offload */ 956 txd = itxd; 957 txd_pdma = qdma_to_pdma(ring, txd); 958 nr_frags = skb_shinfo(skb)->nr_frags; 959 960 for (i = 0; i < nr_frags; i++) { 961 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 962 unsigned int offset = 0; 963 int frag_size = skb_frag_size(frag); 964 965 while (frag_size) { 966 bool last_frag = false; 967 unsigned int frag_map_size; 968 bool new_desc = true; 969 970 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA) || 971 (i & 0x1)) { 972 txd = mtk_qdma_phys_to_virt(ring, txd->txd2); 973 txd_pdma = qdma_to_pdma(ring, txd); 974 if (txd == ring->last_free) 975 goto err_dma; 976 977 n_desc++; 978 } else { 979 new_desc = false; 980 } 981 982 983 frag_map_size = min(frag_size, MTK_TX_DMA_BUF_LEN); 984 mapped_addr = skb_frag_dma_map(eth->dev, frag, offset, 985 frag_map_size, 986 DMA_TO_DEVICE); 987 if (unlikely(dma_mapping_error(eth->dev, mapped_addr))) 988 goto err_dma; 989 990 if (i == nr_frags - 1 && 991 (frag_size - frag_map_size) == 0) 992 last_frag = true; 993 994 WRITE_ONCE(txd->txd1, mapped_addr); 995 WRITE_ONCE(txd->txd3, (TX_DMA_SWC | 996 TX_DMA_PLEN0(frag_map_size) | 997 last_frag * TX_DMA_LS0)); 998 WRITE_ONCE(txd->txd4, fport); 999 1000 tx_buf = mtk_desc_to_tx_buf(ring, txd); 1001 if (new_desc) 1002 memset(tx_buf, 0, sizeof(*tx_buf)); 1003 tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC; 1004 tx_buf->flags |= MTK_TX_FLAGS_PAGE0; 1005 tx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 : 1006 MTK_TX_FLAGS_FPORT1; 1007 1008 setup_tx_buf(eth, tx_buf, txd_pdma, mapped_addr, 1009 frag_map_size, k++); 1010 1011 frag_size -= frag_map_size; 1012 offset += frag_map_size; 1013 } 1014 } 1015 1016 /* store skb to cleanup */ 1017 itx_buf->skb = skb; 1018 1019 WRITE_ONCE(itxd->txd4, txd4); 1020 WRITE_ONCE(itxd->txd3, (TX_DMA_SWC | TX_DMA_PLEN0(skb_headlen(skb)) | 1021 (!nr_frags * TX_DMA_LS0))); 1022 if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 1023 if (k & 0x1) 1024 txd_pdma->txd2 |= TX_DMA_LS0; 1025 else 1026 txd_pdma->txd2 |= TX_DMA_LS1; 1027 } 1028 1029 netdev_sent_queue(dev, skb->len); 1030 skb_tx_timestamp(skb); 1031 1032 ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2); 1033 atomic_sub(n_desc, &ring->free_count); 1034 1035 /* make sure that all changes to the dma ring are flushed before we 1036 * continue 1037 */ 1038 wmb(); 1039 1040 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 1041 if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) || 1042 !netdev_xmit_more()) 1043 mtk_w32(eth, txd->txd2, MTK_QTX_CTX_PTR); 1044 } else { 1045 int next_idx = NEXT_DESP_IDX(txd_to_idx(ring, txd), 1046 ring->dma_size); 1047 mtk_w32(eth, next_idx, MT7628_TX_CTX_IDX0); 1048 } 1049 1050 return 0; 1051 1052 err_dma: 1053 do { 1054 tx_buf = mtk_desc_to_tx_buf(ring, itxd); 1055 1056 /* unmap dma */ 1057 mtk_tx_unmap(eth, tx_buf); 1058 1059 itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; 1060 if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) 1061 itxd_pdma->txd2 = TX_DMA_DESP2_DEF; 1062 1063 itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2); 1064 itxd_pdma = qdma_to_pdma(ring, itxd); 1065 } while (itxd != txd); 1066 1067 return -ENOMEM; 1068 } 1069 1070 static inline int mtk_cal_txd_req(struct sk_buff *skb) 1071 { 1072 int i, nfrags; 1073 skb_frag_t *frag; 1074 1075 nfrags = 1; 1076 if (skb_is_gso(skb)) { 1077 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1078 frag = &skb_shinfo(skb)->frags[i]; 1079 nfrags += DIV_ROUND_UP(skb_frag_size(frag), 1080 MTK_TX_DMA_BUF_LEN); 1081 } 1082 } else { 1083 nfrags += skb_shinfo(skb)->nr_frags; 1084 } 1085 1086 return nfrags; 1087 } 1088 1089 static int mtk_queue_stopped(struct mtk_eth *eth) 1090 { 1091 int i; 1092 1093 for (i = 0; i < MTK_MAC_COUNT; i++) { 1094 if (!eth->netdev[i]) 1095 continue; 1096 if (netif_queue_stopped(eth->netdev[i])) 1097 return 1; 1098 } 1099 1100 return 0; 1101 } 1102 1103 static void mtk_wake_queue(struct mtk_eth *eth) 1104 { 1105 int i; 1106 1107 for (i = 0; i < MTK_MAC_COUNT; i++) { 1108 if (!eth->netdev[i]) 1109 continue; 1110 netif_wake_queue(eth->netdev[i]); 1111 } 1112 } 1113 1114 static void mtk_stop_queue(struct mtk_eth *eth) 1115 { 1116 int i; 1117 1118 for (i = 0; i < MTK_MAC_COUNT; i++) { 1119 if (!eth->netdev[i]) 1120 continue; 1121 netif_stop_queue(eth->netdev[i]); 1122 } 1123 } 1124 1125 static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev) 1126 { 1127 struct mtk_mac *mac = netdev_priv(dev); 1128 struct mtk_eth *eth = mac->hw; 1129 struct mtk_tx_ring *ring = ð->tx_ring; 1130 struct net_device_stats *stats = &dev->stats; 1131 bool gso = false; 1132 int tx_num; 1133 1134 /* normally we can rely on the stack not calling this more than once, 1135 * however we have 2 queues running on the same ring so we need to lock 1136 * the ring access 1137 */ 1138 spin_lock(ð->page_lock); 1139 1140 if (unlikely(test_bit(MTK_RESETTING, ð->state))) 1141 goto drop; 1142 1143 tx_num = mtk_cal_txd_req(skb); 1144 if (unlikely(atomic_read(&ring->free_count) <= tx_num)) { 1145 mtk_stop_queue(eth); 1146 netif_err(eth, tx_queued, dev, 1147 "Tx Ring full when queue awake!\n"); 1148 spin_unlock(ð->page_lock); 1149 return NETDEV_TX_BUSY; 1150 } 1151 1152 /* TSO: fill MSS info in tcp checksum field */ 1153 if (skb_is_gso(skb)) { 1154 if (skb_cow_head(skb, 0)) { 1155 netif_warn(eth, tx_err, dev, 1156 "GSO expand head fail.\n"); 1157 goto drop; 1158 } 1159 1160 if (skb_shinfo(skb)->gso_type & 1161 (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) { 1162 gso = true; 1163 tcp_hdr(skb)->check = htons(skb_shinfo(skb)->gso_size); 1164 } 1165 } 1166 1167 if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0) 1168 goto drop; 1169 1170 if (unlikely(atomic_read(&ring->free_count) <= ring->thresh)) 1171 mtk_stop_queue(eth); 1172 1173 spin_unlock(ð->page_lock); 1174 1175 return NETDEV_TX_OK; 1176 1177 drop: 1178 spin_unlock(ð->page_lock); 1179 stats->tx_dropped++; 1180 dev_kfree_skb_any(skb); 1181 return NETDEV_TX_OK; 1182 } 1183 1184 static struct mtk_rx_ring *mtk_get_rx_ring(struct mtk_eth *eth) 1185 { 1186 int i; 1187 struct mtk_rx_ring *ring; 1188 int idx; 1189 1190 if (!eth->hwlro) 1191 return ð->rx_ring[0]; 1192 1193 for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) { 1194 ring = ð->rx_ring[i]; 1195 idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size); 1196 if (ring->dma[idx].rxd2 & RX_DMA_DONE) { 1197 ring->calc_idx_update = true; 1198 return ring; 1199 } 1200 } 1201 1202 return NULL; 1203 } 1204 1205 static void mtk_update_rx_cpu_idx(struct mtk_eth *eth) 1206 { 1207 struct mtk_rx_ring *ring; 1208 int i; 1209 1210 if (!eth->hwlro) { 1211 ring = ð->rx_ring[0]; 1212 mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg); 1213 } else { 1214 for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) { 1215 ring = ð->rx_ring[i]; 1216 if (ring->calc_idx_update) { 1217 ring->calc_idx_update = false; 1218 mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg); 1219 } 1220 } 1221 } 1222 } 1223 1224 static int mtk_poll_rx(struct napi_struct *napi, int budget, 1225 struct mtk_eth *eth) 1226 { 1227 struct mtk_rx_ring *ring; 1228 int idx; 1229 struct sk_buff *skb; 1230 u8 *data, *new_data; 1231 struct mtk_rx_dma *rxd, trxd; 1232 int done = 0; 1233 1234 while (done < budget) { 1235 struct net_device *netdev; 1236 unsigned int pktlen; 1237 dma_addr_t dma_addr; 1238 int mac; 1239 1240 ring = mtk_get_rx_ring(eth); 1241 if (unlikely(!ring)) 1242 goto rx_done; 1243 1244 idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size); 1245 rxd = &ring->dma[idx]; 1246 data = ring->data[idx]; 1247 1248 mtk_rx_get_desc(&trxd, rxd); 1249 if (!(trxd.rxd2 & RX_DMA_DONE)) 1250 break; 1251 1252 /* find out which mac the packet come from. values start at 1 */ 1253 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { 1254 mac = 0; 1255 } else { 1256 mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) & 1257 RX_DMA_FPORT_MASK; 1258 mac--; 1259 } 1260 1261 if (unlikely(mac < 0 || mac >= MTK_MAC_COUNT || 1262 !eth->netdev[mac])) 1263 goto release_desc; 1264 1265 netdev = eth->netdev[mac]; 1266 1267 if (unlikely(test_bit(MTK_RESETTING, ð->state))) 1268 goto release_desc; 1269 1270 /* alloc new buffer */ 1271 new_data = napi_alloc_frag(ring->frag_size); 1272 if (unlikely(!new_data)) { 1273 netdev->stats.rx_dropped++; 1274 goto release_desc; 1275 } 1276 dma_addr = dma_map_single(eth->dev, 1277 new_data + NET_SKB_PAD + 1278 eth->ip_align, 1279 ring->buf_size, 1280 DMA_FROM_DEVICE); 1281 if (unlikely(dma_mapping_error(eth->dev, dma_addr))) { 1282 skb_free_frag(new_data); 1283 netdev->stats.rx_dropped++; 1284 goto release_desc; 1285 } 1286 1287 /* receive data */ 1288 skb = build_skb(data, ring->frag_size); 1289 if (unlikely(!skb)) { 1290 skb_free_frag(new_data); 1291 netdev->stats.rx_dropped++; 1292 goto release_desc; 1293 } 1294 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); 1295 1296 dma_unmap_single(eth->dev, trxd.rxd1, 1297 ring->buf_size, DMA_FROM_DEVICE); 1298 pktlen = RX_DMA_GET_PLEN0(trxd.rxd2); 1299 skb->dev = netdev; 1300 skb_put(skb, pktlen); 1301 if (trxd.rxd4 & eth->rx_dma_l4_valid) 1302 skb->ip_summed = CHECKSUM_UNNECESSARY; 1303 else 1304 skb_checksum_none_assert(skb); 1305 skb->protocol = eth_type_trans(skb, netdev); 1306 1307 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX && 1308 RX_DMA_VID(trxd.rxd3)) 1309 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1310 RX_DMA_VID(trxd.rxd3)); 1311 skb_record_rx_queue(skb, 0); 1312 napi_gro_receive(napi, skb); 1313 1314 ring->data[idx] = new_data; 1315 rxd->rxd1 = (unsigned int)dma_addr; 1316 1317 release_desc: 1318 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) 1319 rxd->rxd2 = RX_DMA_LSO; 1320 else 1321 rxd->rxd2 = RX_DMA_PLEN0(ring->buf_size); 1322 1323 ring->calc_idx = idx; 1324 1325 done++; 1326 } 1327 1328 rx_done: 1329 if (done) { 1330 /* make sure that all changes to the dma ring are flushed before 1331 * we continue 1332 */ 1333 wmb(); 1334 mtk_update_rx_cpu_idx(eth); 1335 } 1336 1337 return done; 1338 } 1339 1340 static int mtk_poll_tx_qdma(struct mtk_eth *eth, int budget, 1341 unsigned int *done, unsigned int *bytes) 1342 { 1343 struct mtk_tx_ring *ring = ð->tx_ring; 1344 struct mtk_tx_dma *desc; 1345 struct sk_buff *skb; 1346 struct mtk_tx_buf *tx_buf; 1347 u32 cpu, dma; 1348 1349 cpu = mtk_r32(eth, MTK_QTX_CRX_PTR); 1350 dma = mtk_r32(eth, MTK_QTX_DRX_PTR); 1351 1352 desc = mtk_qdma_phys_to_virt(ring, cpu); 1353 1354 while ((cpu != dma) && budget) { 1355 u32 next_cpu = desc->txd2; 1356 int mac = 0; 1357 1358 desc = mtk_qdma_phys_to_virt(ring, desc->txd2); 1359 if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0) 1360 break; 1361 1362 tx_buf = mtk_desc_to_tx_buf(ring, desc); 1363 if (tx_buf->flags & MTK_TX_FLAGS_FPORT1) 1364 mac = 1; 1365 1366 skb = tx_buf->skb; 1367 if (!skb) 1368 break; 1369 1370 if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) { 1371 bytes[mac] += skb->len; 1372 done[mac]++; 1373 budget--; 1374 } 1375 mtk_tx_unmap(eth, tx_buf); 1376 1377 ring->last_free = desc; 1378 atomic_inc(&ring->free_count); 1379 1380 cpu = next_cpu; 1381 } 1382 1383 mtk_w32(eth, cpu, MTK_QTX_CRX_PTR); 1384 1385 return budget; 1386 } 1387 1388 static int mtk_poll_tx_pdma(struct mtk_eth *eth, int budget, 1389 unsigned int *done, unsigned int *bytes) 1390 { 1391 struct mtk_tx_ring *ring = ð->tx_ring; 1392 struct mtk_tx_dma *desc; 1393 struct sk_buff *skb; 1394 struct mtk_tx_buf *tx_buf; 1395 u32 cpu, dma; 1396 1397 cpu = ring->cpu_idx; 1398 dma = mtk_r32(eth, MT7628_TX_DTX_IDX0); 1399 1400 while ((cpu != dma) && budget) { 1401 tx_buf = &ring->buf[cpu]; 1402 skb = tx_buf->skb; 1403 if (!skb) 1404 break; 1405 1406 if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) { 1407 bytes[0] += skb->len; 1408 done[0]++; 1409 budget--; 1410 } 1411 1412 mtk_tx_unmap(eth, tx_buf); 1413 1414 desc = &ring->dma[cpu]; 1415 ring->last_free = desc; 1416 atomic_inc(&ring->free_count); 1417 1418 cpu = NEXT_DESP_IDX(cpu, ring->dma_size); 1419 } 1420 1421 ring->cpu_idx = cpu; 1422 1423 return budget; 1424 } 1425 1426 static int mtk_poll_tx(struct mtk_eth *eth, int budget) 1427 { 1428 struct mtk_tx_ring *ring = ð->tx_ring; 1429 unsigned int done[MTK_MAX_DEVS]; 1430 unsigned int bytes[MTK_MAX_DEVS]; 1431 int total = 0, i; 1432 1433 memset(done, 0, sizeof(done)); 1434 memset(bytes, 0, sizeof(bytes)); 1435 1436 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) 1437 budget = mtk_poll_tx_qdma(eth, budget, done, bytes); 1438 else 1439 budget = mtk_poll_tx_pdma(eth, budget, done, bytes); 1440 1441 for (i = 0; i < MTK_MAC_COUNT; i++) { 1442 if (!eth->netdev[i] || !done[i]) 1443 continue; 1444 netdev_completed_queue(eth->netdev[i], done[i], bytes[i]); 1445 total += done[i]; 1446 } 1447 1448 if (mtk_queue_stopped(eth) && 1449 (atomic_read(&ring->free_count) > ring->thresh)) 1450 mtk_wake_queue(eth); 1451 1452 return total; 1453 } 1454 1455 static void mtk_handle_status_irq(struct mtk_eth *eth) 1456 { 1457 u32 status2 = mtk_r32(eth, MTK_INT_STATUS2); 1458 1459 if (unlikely(status2 & (MTK_GDM1_AF | MTK_GDM2_AF))) { 1460 mtk_stats_update(eth); 1461 mtk_w32(eth, (MTK_GDM1_AF | MTK_GDM2_AF), 1462 MTK_INT_STATUS2); 1463 } 1464 } 1465 1466 static int mtk_napi_tx(struct napi_struct *napi, int budget) 1467 { 1468 struct mtk_eth *eth = container_of(napi, struct mtk_eth, tx_napi); 1469 u32 status, mask; 1470 int tx_done = 0; 1471 1472 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) 1473 mtk_handle_status_irq(eth); 1474 mtk_w32(eth, MTK_TX_DONE_INT, eth->tx_int_status_reg); 1475 tx_done = mtk_poll_tx(eth, budget); 1476 1477 if (unlikely(netif_msg_intr(eth))) { 1478 status = mtk_r32(eth, eth->tx_int_status_reg); 1479 mask = mtk_r32(eth, eth->tx_int_mask_reg); 1480 dev_info(eth->dev, 1481 "done tx %d, intr 0x%08x/0x%x\n", 1482 tx_done, status, mask); 1483 } 1484 1485 if (tx_done == budget) 1486 return budget; 1487 1488 status = mtk_r32(eth, eth->tx_int_status_reg); 1489 if (status & MTK_TX_DONE_INT) 1490 return budget; 1491 1492 napi_complete(napi); 1493 mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); 1494 1495 return tx_done; 1496 } 1497 1498 static int mtk_napi_rx(struct napi_struct *napi, int budget) 1499 { 1500 struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi); 1501 u32 status, mask; 1502 int rx_done = 0; 1503 int remain_budget = budget; 1504 1505 mtk_handle_status_irq(eth); 1506 1507 poll_again: 1508 mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_STATUS); 1509 rx_done = mtk_poll_rx(napi, remain_budget, eth); 1510 1511 if (unlikely(netif_msg_intr(eth))) { 1512 status = mtk_r32(eth, MTK_PDMA_INT_STATUS); 1513 mask = mtk_r32(eth, MTK_PDMA_INT_MASK); 1514 dev_info(eth->dev, 1515 "done rx %d, intr 0x%08x/0x%x\n", 1516 rx_done, status, mask); 1517 } 1518 if (rx_done == remain_budget) 1519 return budget; 1520 1521 status = mtk_r32(eth, MTK_PDMA_INT_STATUS); 1522 if (status & MTK_RX_DONE_INT) { 1523 remain_budget -= rx_done; 1524 goto poll_again; 1525 } 1526 napi_complete(napi); 1527 mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); 1528 1529 return rx_done + budget - remain_budget; 1530 } 1531 1532 static int mtk_tx_alloc(struct mtk_eth *eth) 1533 { 1534 struct mtk_tx_ring *ring = ð->tx_ring; 1535 int i, sz = sizeof(*ring->dma); 1536 1537 ring->buf = kcalloc(MTK_DMA_SIZE, sizeof(*ring->buf), 1538 GFP_KERNEL); 1539 if (!ring->buf) 1540 goto no_tx_mem; 1541 1542 ring->dma = dma_alloc_coherent(eth->dev, MTK_DMA_SIZE * sz, 1543 &ring->phys, GFP_ATOMIC); 1544 if (!ring->dma) 1545 goto no_tx_mem; 1546 1547 for (i = 0; i < MTK_DMA_SIZE; i++) { 1548 int next = (i + 1) % MTK_DMA_SIZE; 1549 u32 next_ptr = ring->phys + next * sz; 1550 1551 ring->dma[i].txd2 = next_ptr; 1552 ring->dma[i].txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; 1553 } 1554 1555 /* On MT7688 (PDMA only) this driver uses the ring->dma structs 1556 * only as the framework. The real HW descriptors are the PDMA 1557 * descriptors in ring->dma_pdma. 1558 */ 1559 if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 1560 ring->dma_pdma = dma_alloc_coherent(eth->dev, MTK_DMA_SIZE * sz, 1561 &ring->phys_pdma, 1562 GFP_ATOMIC); 1563 if (!ring->dma_pdma) 1564 goto no_tx_mem; 1565 1566 for (i = 0; i < MTK_DMA_SIZE; i++) { 1567 ring->dma_pdma[i].txd2 = TX_DMA_DESP2_DEF; 1568 ring->dma_pdma[i].txd4 = 0; 1569 } 1570 } 1571 1572 ring->dma_size = MTK_DMA_SIZE; 1573 atomic_set(&ring->free_count, MTK_DMA_SIZE - 2); 1574 ring->next_free = &ring->dma[0]; 1575 ring->last_free = &ring->dma[MTK_DMA_SIZE - 1]; 1576 ring->thresh = MAX_SKB_FRAGS; 1577 1578 /* make sure that all changes to the dma ring are flushed before we 1579 * continue 1580 */ 1581 wmb(); 1582 1583 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 1584 mtk_w32(eth, ring->phys, MTK_QTX_CTX_PTR); 1585 mtk_w32(eth, ring->phys, MTK_QTX_DTX_PTR); 1586 mtk_w32(eth, 1587 ring->phys + ((MTK_DMA_SIZE - 1) * sz), 1588 MTK_QTX_CRX_PTR); 1589 mtk_w32(eth, 1590 ring->phys + ((MTK_DMA_SIZE - 1) * sz), 1591 MTK_QTX_DRX_PTR); 1592 mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES, 1593 MTK_QTX_CFG(0)); 1594 } else { 1595 mtk_w32(eth, ring->phys_pdma, MT7628_TX_BASE_PTR0); 1596 mtk_w32(eth, MTK_DMA_SIZE, MT7628_TX_MAX_CNT0); 1597 mtk_w32(eth, 0, MT7628_TX_CTX_IDX0); 1598 mtk_w32(eth, MT7628_PST_DTX_IDX0, MTK_PDMA_RST_IDX); 1599 } 1600 1601 return 0; 1602 1603 no_tx_mem: 1604 return -ENOMEM; 1605 } 1606 1607 static void mtk_tx_clean(struct mtk_eth *eth) 1608 { 1609 struct mtk_tx_ring *ring = ð->tx_ring; 1610 int i; 1611 1612 if (ring->buf) { 1613 for (i = 0; i < MTK_DMA_SIZE; i++) 1614 mtk_tx_unmap(eth, &ring->buf[i]); 1615 kfree(ring->buf); 1616 ring->buf = NULL; 1617 } 1618 1619 if (ring->dma) { 1620 dma_free_coherent(eth->dev, 1621 MTK_DMA_SIZE * sizeof(*ring->dma), 1622 ring->dma, 1623 ring->phys); 1624 ring->dma = NULL; 1625 } 1626 1627 if (ring->dma_pdma) { 1628 dma_free_coherent(eth->dev, 1629 MTK_DMA_SIZE * sizeof(*ring->dma_pdma), 1630 ring->dma_pdma, 1631 ring->phys_pdma); 1632 ring->dma_pdma = NULL; 1633 } 1634 } 1635 1636 static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag) 1637 { 1638 struct mtk_rx_ring *ring; 1639 int rx_data_len, rx_dma_size; 1640 int i; 1641 u32 offset = 0; 1642 1643 if (rx_flag == MTK_RX_FLAGS_QDMA) { 1644 if (ring_no) 1645 return -EINVAL; 1646 ring = ð->rx_ring_qdma; 1647 offset = 0x1000; 1648 } else { 1649 ring = ð->rx_ring[ring_no]; 1650 } 1651 1652 if (rx_flag == MTK_RX_FLAGS_HWLRO) { 1653 rx_data_len = MTK_MAX_LRO_RX_LENGTH; 1654 rx_dma_size = MTK_HW_LRO_DMA_SIZE; 1655 } else { 1656 rx_data_len = ETH_DATA_LEN; 1657 rx_dma_size = MTK_DMA_SIZE; 1658 } 1659 1660 ring->frag_size = mtk_max_frag_size(rx_data_len); 1661 ring->buf_size = mtk_max_buf_size(ring->frag_size); 1662 ring->data = kcalloc(rx_dma_size, sizeof(*ring->data), 1663 GFP_KERNEL); 1664 if (!ring->data) 1665 return -ENOMEM; 1666 1667 for (i = 0; i < rx_dma_size; i++) { 1668 ring->data[i] = netdev_alloc_frag(ring->frag_size); 1669 if (!ring->data[i]) 1670 return -ENOMEM; 1671 } 1672 1673 ring->dma = dma_alloc_coherent(eth->dev, 1674 rx_dma_size * sizeof(*ring->dma), 1675 &ring->phys, GFP_ATOMIC); 1676 if (!ring->dma) 1677 return -ENOMEM; 1678 1679 for (i = 0; i < rx_dma_size; i++) { 1680 dma_addr_t dma_addr = dma_map_single(eth->dev, 1681 ring->data[i] + NET_SKB_PAD + eth->ip_align, 1682 ring->buf_size, 1683 DMA_FROM_DEVICE); 1684 if (unlikely(dma_mapping_error(eth->dev, dma_addr))) 1685 return -ENOMEM; 1686 ring->dma[i].rxd1 = (unsigned int)dma_addr; 1687 1688 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) 1689 ring->dma[i].rxd2 = RX_DMA_LSO; 1690 else 1691 ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size); 1692 } 1693 ring->dma_size = rx_dma_size; 1694 ring->calc_idx_update = false; 1695 ring->calc_idx = rx_dma_size - 1; 1696 ring->crx_idx_reg = MTK_PRX_CRX_IDX_CFG(ring_no); 1697 /* make sure that all changes to the dma ring are flushed before we 1698 * continue 1699 */ 1700 wmb(); 1701 1702 mtk_w32(eth, ring->phys, MTK_PRX_BASE_PTR_CFG(ring_no) + offset); 1703 mtk_w32(eth, rx_dma_size, MTK_PRX_MAX_CNT_CFG(ring_no) + offset); 1704 mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg + offset); 1705 mtk_w32(eth, MTK_PST_DRX_IDX_CFG(ring_no), MTK_PDMA_RST_IDX + offset); 1706 1707 return 0; 1708 } 1709 1710 static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring) 1711 { 1712 int i; 1713 1714 if (ring->data && ring->dma) { 1715 for (i = 0; i < ring->dma_size; i++) { 1716 if (!ring->data[i]) 1717 continue; 1718 if (!ring->dma[i].rxd1) 1719 continue; 1720 dma_unmap_single(eth->dev, 1721 ring->dma[i].rxd1, 1722 ring->buf_size, 1723 DMA_FROM_DEVICE); 1724 skb_free_frag(ring->data[i]); 1725 } 1726 kfree(ring->data); 1727 ring->data = NULL; 1728 } 1729 1730 if (ring->dma) { 1731 dma_free_coherent(eth->dev, 1732 ring->dma_size * sizeof(*ring->dma), 1733 ring->dma, 1734 ring->phys); 1735 ring->dma = NULL; 1736 } 1737 } 1738 1739 static int mtk_hwlro_rx_init(struct mtk_eth *eth) 1740 { 1741 int i; 1742 u32 ring_ctrl_dw1 = 0, ring_ctrl_dw2 = 0, ring_ctrl_dw3 = 0; 1743 u32 lro_ctrl_dw0 = 0, lro_ctrl_dw3 = 0; 1744 1745 /* set LRO rings to auto-learn modes */ 1746 ring_ctrl_dw2 |= MTK_RING_AUTO_LERAN_MODE; 1747 1748 /* validate LRO ring */ 1749 ring_ctrl_dw2 |= MTK_RING_VLD; 1750 1751 /* set AGE timer (unit: 20us) */ 1752 ring_ctrl_dw2 |= MTK_RING_AGE_TIME_H; 1753 ring_ctrl_dw1 |= MTK_RING_AGE_TIME_L; 1754 1755 /* set max AGG timer (unit: 20us) */ 1756 ring_ctrl_dw2 |= MTK_RING_MAX_AGG_TIME; 1757 1758 /* set max LRO AGG count */ 1759 ring_ctrl_dw2 |= MTK_RING_MAX_AGG_CNT_L; 1760 ring_ctrl_dw3 |= MTK_RING_MAX_AGG_CNT_H; 1761 1762 for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) { 1763 mtk_w32(eth, ring_ctrl_dw1, MTK_LRO_CTRL_DW1_CFG(i)); 1764 mtk_w32(eth, ring_ctrl_dw2, MTK_LRO_CTRL_DW2_CFG(i)); 1765 mtk_w32(eth, ring_ctrl_dw3, MTK_LRO_CTRL_DW3_CFG(i)); 1766 } 1767 1768 /* IPv4 checksum update enable */ 1769 lro_ctrl_dw0 |= MTK_L3_CKS_UPD_EN; 1770 1771 /* switch priority comparison to packet count mode */ 1772 lro_ctrl_dw0 |= MTK_LRO_ALT_PKT_CNT_MODE; 1773 1774 /* bandwidth threshold setting */ 1775 mtk_w32(eth, MTK_HW_LRO_BW_THRE, MTK_PDMA_LRO_CTRL_DW2); 1776 1777 /* auto-learn score delta setting */ 1778 mtk_w32(eth, MTK_HW_LRO_REPLACE_DELTA, MTK_PDMA_LRO_ALT_SCORE_DELTA); 1779 1780 /* set refresh timer for altering flows to 1 sec. (unit: 20us) */ 1781 mtk_w32(eth, (MTK_HW_LRO_TIMER_UNIT << 16) | MTK_HW_LRO_REFRESH_TIME, 1782 MTK_PDMA_LRO_ALT_REFRESH_TIMER); 1783 1784 /* set HW LRO mode & the max aggregation count for rx packets */ 1785 lro_ctrl_dw3 |= MTK_ADMA_MODE | (MTK_HW_LRO_MAX_AGG_CNT & 0xff); 1786 1787 /* the minimal remaining room of SDL0 in RXD for lro aggregation */ 1788 lro_ctrl_dw3 |= MTK_LRO_MIN_RXD_SDL; 1789 1790 /* enable HW LRO */ 1791 lro_ctrl_dw0 |= MTK_LRO_EN; 1792 1793 mtk_w32(eth, lro_ctrl_dw3, MTK_PDMA_LRO_CTRL_DW3); 1794 mtk_w32(eth, lro_ctrl_dw0, MTK_PDMA_LRO_CTRL_DW0); 1795 1796 return 0; 1797 } 1798 1799 static void mtk_hwlro_rx_uninit(struct mtk_eth *eth) 1800 { 1801 int i; 1802 u32 val; 1803 1804 /* relinquish lro rings, flush aggregated packets */ 1805 mtk_w32(eth, MTK_LRO_RING_RELINQUISH_REQ, MTK_PDMA_LRO_CTRL_DW0); 1806 1807 /* wait for relinquishments done */ 1808 for (i = 0; i < 10; i++) { 1809 val = mtk_r32(eth, MTK_PDMA_LRO_CTRL_DW0); 1810 if (val & MTK_LRO_RING_RELINQUISH_DONE) { 1811 msleep(20); 1812 continue; 1813 } 1814 break; 1815 } 1816 1817 /* invalidate lro rings */ 1818 for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) 1819 mtk_w32(eth, 0, MTK_LRO_CTRL_DW2_CFG(i)); 1820 1821 /* disable HW LRO */ 1822 mtk_w32(eth, 0, MTK_PDMA_LRO_CTRL_DW0); 1823 } 1824 1825 static void mtk_hwlro_val_ipaddr(struct mtk_eth *eth, int idx, __be32 ip) 1826 { 1827 u32 reg_val; 1828 1829 reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx)); 1830 1831 /* invalidate the IP setting */ 1832 mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); 1833 1834 mtk_w32(eth, ip, MTK_LRO_DIP_DW0_CFG(idx)); 1835 1836 /* validate the IP setting */ 1837 mtk_w32(eth, (reg_val | MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); 1838 } 1839 1840 static void mtk_hwlro_inval_ipaddr(struct mtk_eth *eth, int idx) 1841 { 1842 u32 reg_val; 1843 1844 reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx)); 1845 1846 /* invalidate the IP setting */ 1847 mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); 1848 1849 mtk_w32(eth, 0, MTK_LRO_DIP_DW0_CFG(idx)); 1850 } 1851 1852 static int mtk_hwlro_get_ip_cnt(struct mtk_mac *mac) 1853 { 1854 int cnt = 0; 1855 int i; 1856 1857 for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { 1858 if (mac->hwlro_ip[i]) 1859 cnt++; 1860 } 1861 1862 return cnt; 1863 } 1864 1865 static int mtk_hwlro_add_ipaddr(struct net_device *dev, 1866 struct ethtool_rxnfc *cmd) 1867 { 1868 struct ethtool_rx_flow_spec *fsp = 1869 (struct ethtool_rx_flow_spec *)&cmd->fs; 1870 struct mtk_mac *mac = netdev_priv(dev); 1871 struct mtk_eth *eth = mac->hw; 1872 int hwlro_idx; 1873 1874 if ((fsp->flow_type != TCP_V4_FLOW) || 1875 (!fsp->h_u.tcp_ip4_spec.ip4dst) || 1876 (fsp->location > 1)) 1877 return -EINVAL; 1878 1879 mac->hwlro_ip[fsp->location] = htonl(fsp->h_u.tcp_ip4_spec.ip4dst); 1880 hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location; 1881 1882 mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac); 1883 1884 mtk_hwlro_val_ipaddr(eth, hwlro_idx, mac->hwlro_ip[fsp->location]); 1885 1886 return 0; 1887 } 1888 1889 static int mtk_hwlro_del_ipaddr(struct net_device *dev, 1890 struct ethtool_rxnfc *cmd) 1891 { 1892 struct ethtool_rx_flow_spec *fsp = 1893 (struct ethtool_rx_flow_spec *)&cmd->fs; 1894 struct mtk_mac *mac = netdev_priv(dev); 1895 struct mtk_eth *eth = mac->hw; 1896 int hwlro_idx; 1897 1898 if (fsp->location > 1) 1899 return -EINVAL; 1900 1901 mac->hwlro_ip[fsp->location] = 0; 1902 hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location; 1903 1904 mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac); 1905 1906 mtk_hwlro_inval_ipaddr(eth, hwlro_idx); 1907 1908 return 0; 1909 } 1910 1911 static void mtk_hwlro_netdev_disable(struct net_device *dev) 1912 { 1913 struct mtk_mac *mac = netdev_priv(dev); 1914 struct mtk_eth *eth = mac->hw; 1915 int i, hwlro_idx; 1916 1917 for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { 1918 mac->hwlro_ip[i] = 0; 1919 hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + i; 1920 1921 mtk_hwlro_inval_ipaddr(eth, hwlro_idx); 1922 } 1923 1924 mac->hwlro_ip_cnt = 0; 1925 } 1926 1927 static int mtk_hwlro_get_fdir_entry(struct net_device *dev, 1928 struct ethtool_rxnfc *cmd) 1929 { 1930 struct mtk_mac *mac = netdev_priv(dev); 1931 struct ethtool_rx_flow_spec *fsp = 1932 (struct ethtool_rx_flow_spec *)&cmd->fs; 1933 1934 /* only tcp dst ipv4 is meaningful, others are meaningless */ 1935 fsp->flow_type = TCP_V4_FLOW; 1936 fsp->h_u.tcp_ip4_spec.ip4dst = ntohl(mac->hwlro_ip[fsp->location]); 1937 fsp->m_u.tcp_ip4_spec.ip4dst = 0; 1938 1939 fsp->h_u.tcp_ip4_spec.ip4src = 0; 1940 fsp->m_u.tcp_ip4_spec.ip4src = 0xffffffff; 1941 fsp->h_u.tcp_ip4_spec.psrc = 0; 1942 fsp->m_u.tcp_ip4_spec.psrc = 0xffff; 1943 fsp->h_u.tcp_ip4_spec.pdst = 0; 1944 fsp->m_u.tcp_ip4_spec.pdst = 0xffff; 1945 fsp->h_u.tcp_ip4_spec.tos = 0; 1946 fsp->m_u.tcp_ip4_spec.tos = 0xff; 1947 1948 return 0; 1949 } 1950 1951 static int mtk_hwlro_get_fdir_all(struct net_device *dev, 1952 struct ethtool_rxnfc *cmd, 1953 u32 *rule_locs) 1954 { 1955 struct mtk_mac *mac = netdev_priv(dev); 1956 int cnt = 0; 1957 int i; 1958 1959 for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { 1960 if (mac->hwlro_ip[i]) { 1961 rule_locs[cnt] = i; 1962 cnt++; 1963 } 1964 } 1965 1966 cmd->rule_cnt = cnt; 1967 1968 return 0; 1969 } 1970 1971 static netdev_features_t mtk_fix_features(struct net_device *dev, 1972 netdev_features_t features) 1973 { 1974 if (!(features & NETIF_F_LRO)) { 1975 struct mtk_mac *mac = netdev_priv(dev); 1976 int ip_cnt = mtk_hwlro_get_ip_cnt(mac); 1977 1978 if (ip_cnt) { 1979 netdev_info(dev, "RX flow is programmed, LRO should keep on\n"); 1980 1981 features |= NETIF_F_LRO; 1982 } 1983 } 1984 1985 return features; 1986 } 1987 1988 static int mtk_set_features(struct net_device *dev, netdev_features_t features) 1989 { 1990 int err = 0; 1991 1992 if (!((dev->features ^ features) & NETIF_F_LRO)) 1993 return 0; 1994 1995 if (!(features & NETIF_F_LRO)) 1996 mtk_hwlro_netdev_disable(dev); 1997 1998 return err; 1999 } 2000 2001 /* wait for DMA to finish whatever it is doing before we start using it again */ 2002 static int mtk_dma_busy_wait(struct mtk_eth *eth) 2003 { 2004 unsigned long t_start = jiffies; 2005 2006 while (1) { 2007 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 2008 if (!(mtk_r32(eth, MTK_QDMA_GLO_CFG) & 2009 (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) 2010 return 0; 2011 } else { 2012 if (!(mtk_r32(eth, MTK_PDMA_GLO_CFG) & 2013 (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) 2014 return 0; 2015 } 2016 2017 if (time_after(jiffies, t_start + MTK_DMA_BUSY_TIMEOUT)) 2018 break; 2019 } 2020 2021 dev_err(eth->dev, "DMA init timeout\n"); 2022 return -1; 2023 } 2024 2025 static int mtk_dma_init(struct mtk_eth *eth) 2026 { 2027 int err; 2028 u32 i; 2029 2030 if (mtk_dma_busy_wait(eth)) 2031 return -EBUSY; 2032 2033 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 2034 /* QDMA needs scratch memory for internal reordering of the 2035 * descriptors 2036 */ 2037 err = mtk_init_fq_dma(eth); 2038 if (err) 2039 return err; 2040 } 2041 2042 err = mtk_tx_alloc(eth); 2043 if (err) 2044 return err; 2045 2046 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 2047 err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_QDMA); 2048 if (err) 2049 return err; 2050 } 2051 2052 err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_NORMAL); 2053 if (err) 2054 return err; 2055 2056 if (eth->hwlro) { 2057 for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) { 2058 err = mtk_rx_alloc(eth, i, MTK_RX_FLAGS_HWLRO); 2059 if (err) 2060 return err; 2061 } 2062 err = mtk_hwlro_rx_init(eth); 2063 if (err) 2064 return err; 2065 } 2066 2067 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 2068 /* Enable random early drop and set drop threshold 2069 * automatically 2070 */ 2071 mtk_w32(eth, FC_THRES_DROP_MODE | FC_THRES_DROP_EN | 2072 FC_THRES_MIN, MTK_QDMA_FC_THRES); 2073 mtk_w32(eth, 0x0, MTK_QDMA_HRED2); 2074 } 2075 2076 return 0; 2077 } 2078 2079 static void mtk_dma_free(struct mtk_eth *eth) 2080 { 2081 int i; 2082 2083 for (i = 0; i < MTK_MAC_COUNT; i++) 2084 if (eth->netdev[i]) 2085 netdev_reset_queue(eth->netdev[i]); 2086 if (eth->scratch_ring) { 2087 dma_free_coherent(eth->dev, 2088 MTK_DMA_SIZE * sizeof(struct mtk_tx_dma), 2089 eth->scratch_ring, 2090 eth->phy_scratch_ring); 2091 eth->scratch_ring = NULL; 2092 eth->phy_scratch_ring = 0; 2093 } 2094 mtk_tx_clean(eth); 2095 mtk_rx_clean(eth, ð->rx_ring[0]); 2096 mtk_rx_clean(eth, ð->rx_ring_qdma); 2097 2098 if (eth->hwlro) { 2099 mtk_hwlro_rx_uninit(eth); 2100 for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) 2101 mtk_rx_clean(eth, ð->rx_ring[i]); 2102 } 2103 2104 kfree(eth->scratch_head); 2105 } 2106 2107 static void mtk_tx_timeout(struct net_device *dev, unsigned int txqueue) 2108 { 2109 struct mtk_mac *mac = netdev_priv(dev); 2110 struct mtk_eth *eth = mac->hw; 2111 2112 eth->netdev[mac->id]->stats.tx_errors++; 2113 netif_err(eth, tx_err, dev, 2114 "transmit timed out\n"); 2115 schedule_work(ð->pending_work); 2116 } 2117 2118 static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth) 2119 { 2120 struct mtk_eth *eth = _eth; 2121 2122 if (likely(napi_schedule_prep(ð->rx_napi))) { 2123 __napi_schedule(ð->rx_napi); 2124 mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); 2125 } 2126 2127 return IRQ_HANDLED; 2128 } 2129 2130 static irqreturn_t mtk_handle_irq_tx(int irq, void *_eth) 2131 { 2132 struct mtk_eth *eth = _eth; 2133 2134 if (likely(napi_schedule_prep(ð->tx_napi))) { 2135 __napi_schedule(ð->tx_napi); 2136 mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); 2137 } 2138 2139 return IRQ_HANDLED; 2140 } 2141 2142 static irqreturn_t mtk_handle_irq(int irq, void *_eth) 2143 { 2144 struct mtk_eth *eth = _eth; 2145 2146 if (mtk_r32(eth, MTK_PDMA_INT_MASK) & MTK_RX_DONE_INT) { 2147 if (mtk_r32(eth, MTK_PDMA_INT_STATUS) & MTK_RX_DONE_INT) 2148 mtk_handle_irq_rx(irq, _eth); 2149 } 2150 if (mtk_r32(eth, eth->tx_int_mask_reg) & MTK_TX_DONE_INT) { 2151 if (mtk_r32(eth, eth->tx_int_status_reg) & MTK_TX_DONE_INT) 2152 mtk_handle_irq_tx(irq, _eth); 2153 } 2154 2155 return IRQ_HANDLED; 2156 } 2157 2158 #ifdef CONFIG_NET_POLL_CONTROLLER 2159 static void mtk_poll_controller(struct net_device *dev) 2160 { 2161 struct mtk_mac *mac = netdev_priv(dev); 2162 struct mtk_eth *eth = mac->hw; 2163 2164 mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); 2165 mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); 2166 mtk_handle_irq_rx(eth->irq[2], dev); 2167 mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); 2168 mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); 2169 } 2170 #endif 2171 2172 static int mtk_start_dma(struct mtk_eth *eth) 2173 { 2174 u32 rx_2b_offset = (NET_IP_ALIGN == 2) ? MTK_RX_2B_OFFSET : 0; 2175 int err; 2176 2177 err = mtk_dma_init(eth); 2178 if (err) { 2179 mtk_dma_free(eth); 2180 return err; 2181 } 2182 2183 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 2184 mtk_w32(eth, 2185 MTK_TX_WB_DDONE | MTK_TX_DMA_EN | 2186 MTK_DMA_SIZE_16DWORDS | MTK_NDP_CO_PRO | 2187 MTK_RX_DMA_EN | MTK_RX_2B_OFFSET | 2188 MTK_RX_BT_32DWORDS, 2189 MTK_QDMA_GLO_CFG); 2190 2191 mtk_w32(eth, 2192 MTK_RX_DMA_EN | rx_2b_offset | 2193 MTK_RX_BT_32DWORDS | MTK_MULTI_EN, 2194 MTK_PDMA_GLO_CFG); 2195 } else { 2196 mtk_w32(eth, MTK_TX_WB_DDONE | MTK_TX_DMA_EN | MTK_RX_DMA_EN | 2197 MTK_MULTI_EN | MTK_PDMA_SIZE_8DWORDS, 2198 MTK_PDMA_GLO_CFG); 2199 } 2200 2201 return 0; 2202 } 2203 2204 static void mtk_gdm_config(struct mtk_eth *eth, u32 config) 2205 { 2206 int i; 2207 2208 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) 2209 return; 2210 2211 for (i = 0; i < MTK_MAC_COUNT; i++) { 2212 u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i)); 2213 2214 /* default setup the forward port to send frame to PDMA */ 2215 val &= ~0xffff; 2216 2217 /* Enable RX checksum */ 2218 val |= MTK_GDMA_ICS_EN | MTK_GDMA_TCS_EN | MTK_GDMA_UCS_EN; 2219 2220 val |= config; 2221 2222 mtk_w32(eth, val, MTK_GDMA_FWD_CFG(i)); 2223 } 2224 /* Reset and enable PSE */ 2225 mtk_w32(eth, RST_GL_PSE, MTK_RST_GL); 2226 mtk_w32(eth, 0, MTK_RST_GL); 2227 } 2228 2229 static int mtk_open(struct net_device *dev) 2230 { 2231 struct mtk_mac *mac = netdev_priv(dev); 2232 struct mtk_eth *eth = mac->hw; 2233 int err; 2234 2235 err = phylink_of_phy_connect(mac->phylink, mac->of_node, 0); 2236 if (err) { 2237 netdev_err(dev, "%s: could not attach PHY: %d\n", __func__, 2238 err); 2239 return err; 2240 } 2241 2242 /* we run 2 netdevs on the same dma ring so we only bring it up once */ 2243 if (!refcount_read(ð->dma_refcnt)) { 2244 int err = mtk_start_dma(eth); 2245 2246 if (err) 2247 return err; 2248 2249 mtk_gdm_config(eth, MTK_GDMA_TO_PDMA); 2250 2251 napi_enable(ð->tx_napi); 2252 napi_enable(ð->rx_napi); 2253 mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); 2254 mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); 2255 refcount_set(ð->dma_refcnt, 1); 2256 } 2257 else 2258 refcount_inc(ð->dma_refcnt); 2259 2260 phylink_start(mac->phylink); 2261 netif_start_queue(dev); 2262 return 0; 2263 } 2264 2265 static void mtk_stop_dma(struct mtk_eth *eth, u32 glo_cfg) 2266 { 2267 u32 val; 2268 int i; 2269 2270 /* stop the dma engine */ 2271 spin_lock_bh(ð->page_lock); 2272 val = mtk_r32(eth, glo_cfg); 2273 mtk_w32(eth, val & ~(MTK_TX_WB_DDONE | MTK_RX_DMA_EN | MTK_TX_DMA_EN), 2274 glo_cfg); 2275 spin_unlock_bh(ð->page_lock); 2276 2277 /* wait for dma stop */ 2278 for (i = 0; i < 10; i++) { 2279 val = mtk_r32(eth, glo_cfg); 2280 if (val & (MTK_TX_DMA_BUSY | MTK_RX_DMA_BUSY)) { 2281 msleep(20); 2282 continue; 2283 } 2284 break; 2285 } 2286 } 2287 2288 static int mtk_stop(struct net_device *dev) 2289 { 2290 struct mtk_mac *mac = netdev_priv(dev); 2291 struct mtk_eth *eth = mac->hw; 2292 2293 phylink_stop(mac->phylink); 2294 2295 netif_tx_disable(dev); 2296 2297 phylink_disconnect_phy(mac->phylink); 2298 2299 /* only shutdown DMA if this is the last user */ 2300 if (!refcount_dec_and_test(ð->dma_refcnt)) 2301 return 0; 2302 2303 mtk_gdm_config(eth, MTK_GDMA_DROP_ALL); 2304 2305 mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); 2306 mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); 2307 napi_disable(ð->tx_napi); 2308 napi_disable(ð->rx_napi); 2309 2310 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) 2311 mtk_stop_dma(eth, MTK_QDMA_GLO_CFG); 2312 mtk_stop_dma(eth, MTK_PDMA_GLO_CFG); 2313 2314 mtk_dma_free(eth); 2315 2316 return 0; 2317 } 2318 2319 static void ethsys_reset(struct mtk_eth *eth, u32 reset_bits) 2320 { 2321 regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL, 2322 reset_bits, 2323 reset_bits); 2324 2325 usleep_range(1000, 1100); 2326 regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL, 2327 reset_bits, 2328 ~reset_bits); 2329 mdelay(10); 2330 } 2331 2332 static void mtk_clk_disable(struct mtk_eth *eth) 2333 { 2334 int clk; 2335 2336 for (clk = MTK_CLK_MAX - 1; clk >= 0; clk--) 2337 clk_disable_unprepare(eth->clks[clk]); 2338 } 2339 2340 static int mtk_clk_enable(struct mtk_eth *eth) 2341 { 2342 int clk, ret; 2343 2344 for (clk = 0; clk < MTK_CLK_MAX ; clk++) { 2345 ret = clk_prepare_enable(eth->clks[clk]); 2346 if (ret) 2347 goto err_disable_clks; 2348 } 2349 2350 return 0; 2351 2352 err_disable_clks: 2353 while (--clk >= 0) 2354 clk_disable_unprepare(eth->clks[clk]); 2355 2356 return ret; 2357 } 2358 2359 static int mtk_hw_init(struct mtk_eth *eth) 2360 { 2361 int i, val, ret; 2362 2363 if (test_and_set_bit(MTK_HW_INIT, ð->state)) 2364 return 0; 2365 2366 pm_runtime_enable(eth->dev); 2367 pm_runtime_get_sync(eth->dev); 2368 2369 ret = mtk_clk_enable(eth); 2370 if (ret) 2371 goto err_disable_pm; 2372 2373 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { 2374 ret = device_reset(eth->dev); 2375 if (ret) { 2376 dev_err(eth->dev, "MAC reset failed!\n"); 2377 goto err_disable_pm; 2378 } 2379 2380 /* enable interrupt delay for RX */ 2381 mtk_w32(eth, MTK_PDMA_DELAY_RX_DELAY, MTK_PDMA_DELAY_INT); 2382 2383 /* disable delay and normal interrupt */ 2384 mtk_tx_irq_disable(eth, ~0); 2385 mtk_rx_irq_disable(eth, ~0); 2386 2387 return 0; 2388 } 2389 2390 /* Non-MT7628 handling... */ 2391 ethsys_reset(eth, RSTCTRL_FE); 2392 ethsys_reset(eth, RSTCTRL_PPE); 2393 2394 if (eth->pctl) { 2395 /* Set GE2 driving and slew rate */ 2396 regmap_write(eth->pctl, GPIO_DRV_SEL10, 0xa00); 2397 2398 /* set GE2 TDSEL */ 2399 regmap_write(eth->pctl, GPIO_OD33_CTRL8, 0x5); 2400 2401 /* set GE2 TUNE */ 2402 regmap_write(eth->pctl, GPIO_BIAS_CTRL, 0x0); 2403 } 2404 2405 /* Set linkdown as the default for each GMAC. Its own MCR would be set 2406 * up with the more appropriate value when mtk_mac_config call is being 2407 * invoked. 2408 */ 2409 for (i = 0; i < MTK_MAC_COUNT; i++) 2410 mtk_w32(eth, MAC_MCR_FORCE_LINK_DOWN, MTK_MAC_MCR(i)); 2411 2412 /* Indicates CDM to parse the MTK special tag from CPU 2413 * which also is working out for untag packets. 2414 */ 2415 val = mtk_r32(eth, MTK_CDMQ_IG_CTRL); 2416 mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL); 2417 2418 /* Enable RX VLan Offloading */ 2419 mtk_w32(eth, 1, MTK_CDMP_EG_CTRL); 2420 2421 /* enable interrupt delay for RX */ 2422 mtk_w32(eth, MTK_PDMA_DELAY_RX_DELAY, MTK_PDMA_DELAY_INT); 2423 2424 /* disable delay and normal interrupt */ 2425 mtk_w32(eth, 0, MTK_QDMA_DELAY_INT); 2426 mtk_tx_irq_disable(eth, ~0); 2427 mtk_rx_irq_disable(eth, ~0); 2428 2429 /* FE int grouping */ 2430 mtk_w32(eth, MTK_TX_DONE_INT, MTK_PDMA_INT_GRP1); 2431 mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_GRP2); 2432 mtk_w32(eth, MTK_TX_DONE_INT, MTK_QDMA_INT_GRP1); 2433 mtk_w32(eth, MTK_RX_DONE_INT, MTK_QDMA_INT_GRP2); 2434 mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP); 2435 2436 return 0; 2437 2438 err_disable_pm: 2439 pm_runtime_put_sync(eth->dev); 2440 pm_runtime_disable(eth->dev); 2441 2442 return ret; 2443 } 2444 2445 static int mtk_hw_deinit(struct mtk_eth *eth) 2446 { 2447 if (!test_and_clear_bit(MTK_HW_INIT, ð->state)) 2448 return 0; 2449 2450 mtk_clk_disable(eth); 2451 2452 pm_runtime_put_sync(eth->dev); 2453 pm_runtime_disable(eth->dev); 2454 2455 return 0; 2456 } 2457 2458 static int __init mtk_init(struct net_device *dev) 2459 { 2460 struct mtk_mac *mac = netdev_priv(dev); 2461 struct mtk_eth *eth = mac->hw; 2462 const char *mac_addr; 2463 2464 mac_addr = of_get_mac_address(mac->of_node); 2465 if (!IS_ERR(mac_addr)) 2466 ether_addr_copy(dev->dev_addr, mac_addr); 2467 2468 /* If the mac address is invalid, use random mac address */ 2469 if (!is_valid_ether_addr(dev->dev_addr)) { 2470 eth_hw_addr_random(dev); 2471 dev_err(eth->dev, "generated random MAC address %pM\n", 2472 dev->dev_addr); 2473 } 2474 2475 return 0; 2476 } 2477 2478 static void mtk_uninit(struct net_device *dev) 2479 { 2480 struct mtk_mac *mac = netdev_priv(dev); 2481 struct mtk_eth *eth = mac->hw; 2482 2483 phylink_disconnect_phy(mac->phylink); 2484 mtk_tx_irq_disable(eth, ~0); 2485 mtk_rx_irq_disable(eth, ~0); 2486 } 2487 2488 static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2489 { 2490 struct mtk_mac *mac = netdev_priv(dev); 2491 2492 switch (cmd) { 2493 case SIOCGMIIPHY: 2494 case SIOCGMIIREG: 2495 case SIOCSMIIREG: 2496 return phylink_mii_ioctl(mac->phylink, ifr, cmd); 2497 default: 2498 break; 2499 } 2500 2501 return -EOPNOTSUPP; 2502 } 2503 2504 static void mtk_pending_work(struct work_struct *work) 2505 { 2506 struct mtk_eth *eth = container_of(work, struct mtk_eth, pending_work); 2507 int err, i; 2508 unsigned long restart = 0; 2509 2510 rtnl_lock(); 2511 2512 dev_dbg(eth->dev, "[%s][%d] reset\n", __func__, __LINE__); 2513 2514 while (test_and_set_bit_lock(MTK_RESETTING, ð->state)) 2515 cpu_relax(); 2516 2517 dev_dbg(eth->dev, "[%s][%d] mtk_stop starts\n", __func__, __LINE__); 2518 /* stop all devices to make sure that dma is properly shut down */ 2519 for (i = 0; i < MTK_MAC_COUNT; i++) { 2520 if (!eth->netdev[i]) 2521 continue; 2522 mtk_stop(eth->netdev[i]); 2523 __set_bit(i, &restart); 2524 } 2525 dev_dbg(eth->dev, "[%s][%d] mtk_stop ends\n", __func__, __LINE__); 2526 2527 /* restart underlying hardware such as power, clock, pin mux 2528 * and the connected phy 2529 */ 2530 mtk_hw_deinit(eth); 2531 2532 if (eth->dev->pins) 2533 pinctrl_select_state(eth->dev->pins->p, 2534 eth->dev->pins->default_state); 2535 mtk_hw_init(eth); 2536 2537 /* restart DMA and enable IRQs */ 2538 for (i = 0; i < MTK_MAC_COUNT; i++) { 2539 if (!test_bit(i, &restart)) 2540 continue; 2541 err = mtk_open(eth->netdev[i]); 2542 if (err) { 2543 netif_alert(eth, ifup, eth->netdev[i], 2544 "Driver up/down cycle failed, closing device.\n"); 2545 dev_close(eth->netdev[i]); 2546 } 2547 } 2548 2549 dev_dbg(eth->dev, "[%s][%d] reset done\n", __func__, __LINE__); 2550 2551 clear_bit_unlock(MTK_RESETTING, ð->state); 2552 2553 rtnl_unlock(); 2554 } 2555 2556 static int mtk_free_dev(struct mtk_eth *eth) 2557 { 2558 int i; 2559 2560 for (i = 0; i < MTK_MAC_COUNT; i++) { 2561 if (!eth->netdev[i]) 2562 continue; 2563 free_netdev(eth->netdev[i]); 2564 } 2565 2566 return 0; 2567 } 2568 2569 static int mtk_unreg_dev(struct mtk_eth *eth) 2570 { 2571 int i; 2572 2573 for (i = 0; i < MTK_MAC_COUNT; i++) { 2574 if (!eth->netdev[i]) 2575 continue; 2576 unregister_netdev(eth->netdev[i]); 2577 } 2578 2579 return 0; 2580 } 2581 2582 static int mtk_cleanup(struct mtk_eth *eth) 2583 { 2584 mtk_unreg_dev(eth); 2585 mtk_free_dev(eth); 2586 cancel_work_sync(ð->pending_work); 2587 2588 return 0; 2589 } 2590 2591 static int mtk_get_link_ksettings(struct net_device *ndev, 2592 struct ethtool_link_ksettings *cmd) 2593 { 2594 struct mtk_mac *mac = netdev_priv(ndev); 2595 2596 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2597 return -EBUSY; 2598 2599 return phylink_ethtool_ksettings_get(mac->phylink, cmd); 2600 } 2601 2602 static int mtk_set_link_ksettings(struct net_device *ndev, 2603 const struct ethtool_link_ksettings *cmd) 2604 { 2605 struct mtk_mac *mac = netdev_priv(ndev); 2606 2607 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2608 return -EBUSY; 2609 2610 return phylink_ethtool_ksettings_set(mac->phylink, cmd); 2611 } 2612 2613 static void mtk_get_drvinfo(struct net_device *dev, 2614 struct ethtool_drvinfo *info) 2615 { 2616 struct mtk_mac *mac = netdev_priv(dev); 2617 2618 strlcpy(info->driver, mac->hw->dev->driver->name, sizeof(info->driver)); 2619 strlcpy(info->bus_info, dev_name(mac->hw->dev), sizeof(info->bus_info)); 2620 info->n_stats = ARRAY_SIZE(mtk_ethtool_stats); 2621 } 2622 2623 static u32 mtk_get_msglevel(struct net_device *dev) 2624 { 2625 struct mtk_mac *mac = netdev_priv(dev); 2626 2627 return mac->hw->msg_enable; 2628 } 2629 2630 static void mtk_set_msglevel(struct net_device *dev, u32 value) 2631 { 2632 struct mtk_mac *mac = netdev_priv(dev); 2633 2634 mac->hw->msg_enable = value; 2635 } 2636 2637 static int mtk_nway_reset(struct net_device *dev) 2638 { 2639 struct mtk_mac *mac = netdev_priv(dev); 2640 2641 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2642 return -EBUSY; 2643 2644 if (!mac->phylink) 2645 return -ENOTSUPP; 2646 2647 return phylink_ethtool_nway_reset(mac->phylink); 2648 } 2649 2650 static void mtk_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2651 { 2652 int i; 2653 2654 switch (stringset) { 2655 case ETH_SS_STATS: 2656 for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) { 2657 memcpy(data, mtk_ethtool_stats[i].str, ETH_GSTRING_LEN); 2658 data += ETH_GSTRING_LEN; 2659 } 2660 break; 2661 } 2662 } 2663 2664 static int mtk_get_sset_count(struct net_device *dev, int sset) 2665 { 2666 switch (sset) { 2667 case ETH_SS_STATS: 2668 return ARRAY_SIZE(mtk_ethtool_stats); 2669 default: 2670 return -EOPNOTSUPP; 2671 } 2672 } 2673 2674 static void mtk_get_ethtool_stats(struct net_device *dev, 2675 struct ethtool_stats *stats, u64 *data) 2676 { 2677 struct mtk_mac *mac = netdev_priv(dev); 2678 struct mtk_hw_stats *hwstats = mac->hw_stats; 2679 u64 *data_src, *data_dst; 2680 unsigned int start; 2681 int i; 2682 2683 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2684 return; 2685 2686 if (netif_running(dev) && netif_device_present(dev)) { 2687 if (spin_trylock_bh(&hwstats->stats_lock)) { 2688 mtk_stats_update_mac(mac); 2689 spin_unlock_bh(&hwstats->stats_lock); 2690 } 2691 } 2692 2693 data_src = (u64 *)hwstats; 2694 2695 do { 2696 data_dst = data; 2697 start = u64_stats_fetch_begin_irq(&hwstats->syncp); 2698 2699 for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) 2700 *data_dst++ = *(data_src + mtk_ethtool_stats[i].offset); 2701 } while (u64_stats_fetch_retry_irq(&hwstats->syncp, start)); 2702 } 2703 2704 static int mtk_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd, 2705 u32 *rule_locs) 2706 { 2707 int ret = -EOPNOTSUPP; 2708 2709 switch (cmd->cmd) { 2710 case ETHTOOL_GRXRINGS: 2711 if (dev->hw_features & NETIF_F_LRO) { 2712 cmd->data = MTK_MAX_RX_RING_NUM; 2713 ret = 0; 2714 } 2715 break; 2716 case ETHTOOL_GRXCLSRLCNT: 2717 if (dev->hw_features & NETIF_F_LRO) { 2718 struct mtk_mac *mac = netdev_priv(dev); 2719 2720 cmd->rule_cnt = mac->hwlro_ip_cnt; 2721 ret = 0; 2722 } 2723 break; 2724 case ETHTOOL_GRXCLSRULE: 2725 if (dev->hw_features & NETIF_F_LRO) 2726 ret = mtk_hwlro_get_fdir_entry(dev, cmd); 2727 break; 2728 case ETHTOOL_GRXCLSRLALL: 2729 if (dev->hw_features & NETIF_F_LRO) 2730 ret = mtk_hwlro_get_fdir_all(dev, cmd, 2731 rule_locs); 2732 break; 2733 default: 2734 break; 2735 } 2736 2737 return ret; 2738 } 2739 2740 static int mtk_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd) 2741 { 2742 int ret = -EOPNOTSUPP; 2743 2744 switch (cmd->cmd) { 2745 case ETHTOOL_SRXCLSRLINS: 2746 if (dev->hw_features & NETIF_F_LRO) 2747 ret = mtk_hwlro_add_ipaddr(dev, cmd); 2748 break; 2749 case ETHTOOL_SRXCLSRLDEL: 2750 if (dev->hw_features & NETIF_F_LRO) 2751 ret = mtk_hwlro_del_ipaddr(dev, cmd); 2752 break; 2753 default: 2754 break; 2755 } 2756 2757 return ret; 2758 } 2759 2760 static const struct ethtool_ops mtk_ethtool_ops = { 2761 .get_link_ksettings = mtk_get_link_ksettings, 2762 .set_link_ksettings = mtk_set_link_ksettings, 2763 .get_drvinfo = mtk_get_drvinfo, 2764 .get_msglevel = mtk_get_msglevel, 2765 .set_msglevel = mtk_set_msglevel, 2766 .nway_reset = mtk_nway_reset, 2767 .get_link = ethtool_op_get_link, 2768 .get_strings = mtk_get_strings, 2769 .get_sset_count = mtk_get_sset_count, 2770 .get_ethtool_stats = mtk_get_ethtool_stats, 2771 .get_rxnfc = mtk_get_rxnfc, 2772 .set_rxnfc = mtk_set_rxnfc, 2773 }; 2774 2775 static const struct net_device_ops mtk_netdev_ops = { 2776 .ndo_init = mtk_init, 2777 .ndo_uninit = mtk_uninit, 2778 .ndo_open = mtk_open, 2779 .ndo_stop = mtk_stop, 2780 .ndo_start_xmit = mtk_start_xmit, 2781 .ndo_set_mac_address = mtk_set_mac_address, 2782 .ndo_validate_addr = eth_validate_addr, 2783 .ndo_do_ioctl = mtk_do_ioctl, 2784 .ndo_tx_timeout = mtk_tx_timeout, 2785 .ndo_get_stats64 = mtk_get_stats64, 2786 .ndo_fix_features = mtk_fix_features, 2787 .ndo_set_features = mtk_set_features, 2788 #ifdef CONFIG_NET_POLL_CONTROLLER 2789 .ndo_poll_controller = mtk_poll_controller, 2790 #endif 2791 }; 2792 2793 static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np) 2794 { 2795 const __be32 *_id = of_get_property(np, "reg", NULL); 2796 phy_interface_t phy_mode; 2797 struct phylink *phylink; 2798 struct mtk_mac *mac; 2799 int id, err; 2800 2801 if (!_id) { 2802 dev_err(eth->dev, "missing mac id\n"); 2803 return -EINVAL; 2804 } 2805 2806 id = be32_to_cpup(_id); 2807 if (id >= MTK_MAC_COUNT) { 2808 dev_err(eth->dev, "%d is not a valid mac id\n", id); 2809 return -EINVAL; 2810 } 2811 2812 if (eth->netdev[id]) { 2813 dev_err(eth->dev, "duplicate mac id found: %d\n", id); 2814 return -EINVAL; 2815 } 2816 2817 eth->netdev[id] = alloc_etherdev(sizeof(*mac)); 2818 if (!eth->netdev[id]) { 2819 dev_err(eth->dev, "alloc_etherdev failed\n"); 2820 return -ENOMEM; 2821 } 2822 mac = netdev_priv(eth->netdev[id]); 2823 eth->mac[id] = mac; 2824 mac->id = id; 2825 mac->hw = eth; 2826 mac->of_node = np; 2827 2828 memset(mac->hwlro_ip, 0, sizeof(mac->hwlro_ip)); 2829 mac->hwlro_ip_cnt = 0; 2830 2831 mac->hw_stats = devm_kzalloc(eth->dev, 2832 sizeof(*mac->hw_stats), 2833 GFP_KERNEL); 2834 if (!mac->hw_stats) { 2835 dev_err(eth->dev, "failed to allocate counter memory\n"); 2836 err = -ENOMEM; 2837 goto free_netdev; 2838 } 2839 spin_lock_init(&mac->hw_stats->stats_lock); 2840 u64_stats_init(&mac->hw_stats->syncp); 2841 mac->hw_stats->reg_offset = id * MTK_STAT_OFFSET; 2842 2843 /* phylink create */ 2844 err = of_get_phy_mode(np, &phy_mode); 2845 if (err) { 2846 dev_err(eth->dev, "incorrect phy-mode\n"); 2847 goto free_netdev; 2848 } 2849 2850 /* mac config is not set */ 2851 mac->interface = PHY_INTERFACE_MODE_NA; 2852 mac->mode = MLO_AN_PHY; 2853 mac->speed = SPEED_UNKNOWN; 2854 2855 mac->phylink_config.dev = ð->netdev[id]->dev; 2856 mac->phylink_config.type = PHYLINK_NETDEV; 2857 2858 phylink = phylink_create(&mac->phylink_config, 2859 of_fwnode_handle(mac->of_node), 2860 phy_mode, &mtk_phylink_ops); 2861 if (IS_ERR(phylink)) { 2862 err = PTR_ERR(phylink); 2863 goto free_netdev; 2864 } 2865 2866 mac->phylink = phylink; 2867 2868 SET_NETDEV_DEV(eth->netdev[id], eth->dev); 2869 eth->netdev[id]->watchdog_timeo = 5 * HZ; 2870 eth->netdev[id]->netdev_ops = &mtk_netdev_ops; 2871 eth->netdev[id]->base_addr = (unsigned long)eth->base; 2872 2873 eth->netdev[id]->hw_features = eth->soc->hw_features; 2874 if (eth->hwlro) 2875 eth->netdev[id]->hw_features |= NETIF_F_LRO; 2876 2877 eth->netdev[id]->vlan_features = eth->soc->hw_features & 2878 ~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX); 2879 eth->netdev[id]->features |= eth->soc->hw_features; 2880 eth->netdev[id]->ethtool_ops = &mtk_ethtool_ops; 2881 2882 eth->netdev[id]->irq = eth->irq[0]; 2883 eth->netdev[id]->dev.of_node = np; 2884 2885 return 0; 2886 2887 free_netdev: 2888 free_netdev(eth->netdev[id]); 2889 return err; 2890 } 2891 2892 static int mtk_probe(struct platform_device *pdev) 2893 { 2894 struct device_node *mac_np; 2895 struct mtk_eth *eth; 2896 int err, i; 2897 2898 eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL); 2899 if (!eth) 2900 return -ENOMEM; 2901 2902 eth->soc = of_device_get_match_data(&pdev->dev); 2903 2904 eth->dev = &pdev->dev; 2905 eth->base = devm_platform_ioremap_resource(pdev, 0); 2906 if (IS_ERR(eth->base)) 2907 return PTR_ERR(eth->base); 2908 2909 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { 2910 eth->tx_int_mask_reg = MTK_QDMA_INT_MASK; 2911 eth->tx_int_status_reg = MTK_QDMA_INT_STATUS; 2912 } else { 2913 eth->tx_int_mask_reg = MTK_PDMA_INT_MASK; 2914 eth->tx_int_status_reg = MTK_PDMA_INT_STATUS; 2915 } 2916 2917 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { 2918 eth->rx_dma_l4_valid = RX_DMA_L4_VALID_PDMA; 2919 eth->ip_align = NET_IP_ALIGN; 2920 } else { 2921 eth->rx_dma_l4_valid = RX_DMA_L4_VALID; 2922 } 2923 2924 spin_lock_init(ð->page_lock); 2925 spin_lock_init(ð->tx_irq_lock); 2926 spin_lock_init(ð->rx_irq_lock); 2927 2928 if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { 2929 eth->ethsys = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 2930 "mediatek,ethsys"); 2931 if (IS_ERR(eth->ethsys)) { 2932 dev_err(&pdev->dev, "no ethsys regmap found\n"); 2933 return PTR_ERR(eth->ethsys); 2934 } 2935 } 2936 2937 if (MTK_HAS_CAPS(eth->soc->caps, MTK_INFRA)) { 2938 eth->infra = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 2939 "mediatek,infracfg"); 2940 if (IS_ERR(eth->infra)) { 2941 dev_err(&pdev->dev, "no infracfg regmap found\n"); 2942 return PTR_ERR(eth->infra); 2943 } 2944 } 2945 2946 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) { 2947 eth->sgmii = devm_kzalloc(eth->dev, sizeof(*eth->sgmii), 2948 GFP_KERNEL); 2949 if (!eth->sgmii) 2950 return -ENOMEM; 2951 2952 err = mtk_sgmii_init(eth->sgmii, pdev->dev.of_node, 2953 eth->soc->ana_rgc3); 2954 2955 if (err) 2956 return err; 2957 } 2958 2959 if (eth->soc->required_pctl) { 2960 eth->pctl = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 2961 "mediatek,pctl"); 2962 if (IS_ERR(eth->pctl)) { 2963 dev_err(&pdev->dev, "no pctl regmap found\n"); 2964 return PTR_ERR(eth->pctl); 2965 } 2966 } 2967 2968 for (i = 0; i < 3; i++) { 2969 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT) && i > 0) 2970 eth->irq[i] = eth->irq[0]; 2971 else 2972 eth->irq[i] = platform_get_irq(pdev, i); 2973 if (eth->irq[i] < 0) { 2974 dev_err(&pdev->dev, "no IRQ%d resource found\n", i); 2975 return -ENXIO; 2976 } 2977 } 2978 for (i = 0; i < ARRAY_SIZE(eth->clks); i++) { 2979 eth->clks[i] = devm_clk_get(eth->dev, 2980 mtk_clks_source_name[i]); 2981 if (IS_ERR(eth->clks[i])) { 2982 if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER) 2983 return -EPROBE_DEFER; 2984 if (eth->soc->required_clks & BIT(i)) { 2985 dev_err(&pdev->dev, "clock %s not found\n", 2986 mtk_clks_source_name[i]); 2987 return -EINVAL; 2988 } 2989 eth->clks[i] = NULL; 2990 } 2991 } 2992 2993 eth->msg_enable = netif_msg_init(mtk_msg_level, MTK_DEFAULT_MSG_ENABLE); 2994 INIT_WORK(ð->pending_work, mtk_pending_work); 2995 2996 err = mtk_hw_init(eth); 2997 if (err) 2998 return err; 2999 3000 eth->hwlro = MTK_HAS_CAPS(eth->soc->caps, MTK_HWLRO); 3001 3002 for_each_child_of_node(pdev->dev.of_node, mac_np) { 3003 if (!of_device_is_compatible(mac_np, 3004 "mediatek,eth-mac")) 3005 continue; 3006 3007 if (!of_device_is_available(mac_np)) 3008 continue; 3009 3010 err = mtk_add_mac(eth, mac_np); 3011 if (err) { 3012 of_node_put(mac_np); 3013 goto err_deinit_hw; 3014 } 3015 } 3016 3017 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT)) { 3018 err = devm_request_irq(eth->dev, eth->irq[0], 3019 mtk_handle_irq, 0, 3020 dev_name(eth->dev), eth); 3021 } else { 3022 err = devm_request_irq(eth->dev, eth->irq[1], 3023 mtk_handle_irq_tx, 0, 3024 dev_name(eth->dev), eth); 3025 if (err) 3026 goto err_free_dev; 3027 3028 err = devm_request_irq(eth->dev, eth->irq[2], 3029 mtk_handle_irq_rx, 0, 3030 dev_name(eth->dev), eth); 3031 } 3032 if (err) 3033 goto err_free_dev; 3034 3035 /* No MT7628/88 support yet */ 3036 if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { 3037 err = mtk_mdio_init(eth); 3038 if (err) 3039 goto err_free_dev; 3040 } 3041 3042 for (i = 0; i < MTK_MAX_DEVS; i++) { 3043 if (!eth->netdev[i]) 3044 continue; 3045 3046 err = register_netdev(eth->netdev[i]); 3047 if (err) { 3048 dev_err(eth->dev, "error bringing up device\n"); 3049 goto err_deinit_mdio; 3050 } else 3051 netif_info(eth, probe, eth->netdev[i], 3052 "mediatek frame engine at 0x%08lx, irq %d\n", 3053 eth->netdev[i]->base_addr, eth->irq[0]); 3054 } 3055 3056 /* we run 2 devices on the same DMA ring so we need a dummy device 3057 * for NAPI to work 3058 */ 3059 init_dummy_netdev(ð->dummy_dev); 3060 netif_napi_add(ð->dummy_dev, ð->tx_napi, mtk_napi_tx, 3061 MTK_NAPI_WEIGHT); 3062 netif_napi_add(ð->dummy_dev, ð->rx_napi, mtk_napi_rx, 3063 MTK_NAPI_WEIGHT); 3064 3065 platform_set_drvdata(pdev, eth); 3066 3067 return 0; 3068 3069 err_deinit_mdio: 3070 mtk_mdio_cleanup(eth); 3071 err_free_dev: 3072 mtk_free_dev(eth); 3073 err_deinit_hw: 3074 mtk_hw_deinit(eth); 3075 3076 return err; 3077 } 3078 3079 static int mtk_remove(struct platform_device *pdev) 3080 { 3081 struct mtk_eth *eth = platform_get_drvdata(pdev); 3082 struct mtk_mac *mac; 3083 int i; 3084 3085 /* stop all devices to make sure that dma is properly shut down */ 3086 for (i = 0; i < MTK_MAC_COUNT; i++) { 3087 if (!eth->netdev[i]) 3088 continue; 3089 mtk_stop(eth->netdev[i]); 3090 mac = netdev_priv(eth->netdev[i]); 3091 phylink_disconnect_phy(mac->phylink); 3092 } 3093 3094 mtk_hw_deinit(eth); 3095 3096 netif_napi_del(ð->tx_napi); 3097 netif_napi_del(ð->rx_napi); 3098 mtk_cleanup(eth); 3099 mtk_mdio_cleanup(eth); 3100 3101 return 0; 3102 } 3103 3104 static const struct mtk_soc_data mt2701_data = { 3105 .caps = MT7623_CAPS | MTK_HWLRO, 3106 .hw_features = MTK_HW_FEATURES, 3107 .required_clks = MT7623_CLKS_BITMAP, 3108 .required_pctl = true, 3109 }; 3110 3111 static const struct mtk_soc_data mt7621_data = { 3112 .caps = MT7621_CAPS, 3113 .hw_features = MTK_HW_FEATURES, 3114 .required_clks = MT7621_CLKS_BITMAP, 3115 .required_pctl = false, 3116 }; 3117 3118 static const struct mtk_soc_data mt7622_data = { 3119 .ana_rgc3 = 0x2028, 3120 .caps = MT7622_CAPS | MTK_HWLRO, 3121 .hw_features = MTK_HW_FEATURES, 3122 .required_clks = MT7622_CLKS_BITMAP, 3123 .required_pctl = false, 3124 }; 3125 3126 static const struct mtk_soc_data mt7623_data = { 3127 .caps = MT7623_CAPS | MTK_HWLRO, 3128 .hw_features = MTK_HW_FEATURES, 3129 .required_clks = MT7623_CLKS_BITMAP, 3130 .required_pctl = true, 3131 }; 3132 3133 static const struct mtk_soc_data mt7629_data = { 3134 .ana_rgc3 = 0x128, 3135 .caps = MT7629_CAPS | MTK_HWLRO, 3136 .hw_features = MTK_HW_FEATURES, 3137 .required_clks = MT7629_CLKS_BITMAP, 3138 .required_pctl = false, 3139 }; 3140 3141 static const struct mtk_soc_data rt5350_data = { 3142 .caps = MT7628_CAPS, 3143 .hw_features = MTK_HW_FEATURES_MT7628, 3144 .required_clks = MT7628_CLKS_BITMAP, 3145 .required_pctl = false, 3146 }; 3147 3148 const struct of_device_id of_mtk_match[] = { 3149 { .compatible = "mediatek,mt2701-eth", .data = &mt2701_data}, 3150 { .compatible = "mediatek,mt7621-eth", .data = &mt7621_data}, 3151 { .compatible = "mediatek,mt7622-eth", .data = &mt7622_data}, 3152 { .compatible = "mediatek,mt7623-eth", .data = &mt7623_data}, 3153 { .compatible = "mediatek,mt7629-eth", .data = &mt7629_data}, 3154 { .compatible = "ralink,rt5350-eth", .data = &rt5350_data}, 3155 {}, 3156 }; 3157 MODULE_DEVICE_TABLE(of, of_mtk_match); 3158 3159 static struct platform_driver mtk_driver = { 3160 .probe = mtk_probe, 3161 .remove = mtk_remove, 3162 .driver = { 3163 .name = "mtk_soc_eth", 3164 .of_match_table = of_mtk_match, 3165 }, 3166 }; 3167 3168 module_platform_driver(mtk_driver); 3169 3170 MODULE_LICENSE("GPL"); 3171 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); 3172 MODULE_DESCRIPTION("Ethernet driver for MediaTek SoC"); 3173