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 22 #include "mtk_eth_soc.h" 23 24 static int mtk_msg_level = -1; 25 module_param_named(msg_level, mtk_msg_level, int, 0); 26 MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)"); 27 28 #define MTK_ETHTOOL_STAT(x) { #x, \ 29 offsetof(struct mtk_hw_stats, x) / sizeof(u64) } 30 31 /* strings used by ethtool */ 32 static const struct mtk_ethtool_stats { 33 char str[ETH_GSTRING_LEN]; 34 u32 offset; 35 } mtk_ethtool_stats[] = { 36 MTK_ETHTOOL_STAT(tx_bytes), 37 MTK_ETHTOOL_STAT(tx_packets), 38 MTK_ETHTOOL_STAT(tx_skip), 39 MTK_ETHTOOL_STAT(tx_collisions), 40 MTK_ETHTOOL_STAT(rx_bytes), 41 MTK_ETHTOOL_STAT(rx_packets), 42 MTK_ETHTOOL_STAT(rx_overflow), 43 MTK_ETHTOOL_STAT(rx_fcs_errors), 44 MTK_ETHTOOL_STAT(rx_short_errors), 45 MTK_ETHTOOL_STAT(rx_long_errors), 46 MTK_ETHTOOL_STAT(rx_checksum_errors), 47 MTK_ETHTOOL_STAT(rx_flow_control_packets), 48 }; 49 50 static const char * const mtk_clks_source_name[] = { 51 "ethif", "esw", "gp0", "gp1", "gp2", "trgpll", "sgmii_tx250m", 52 "sgmii_rx250m", "sgmii_cdr_ref", "sgmii_cdr_fb", "sgmii_ck", "eth2pll" 53 }; 54 55 void mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg) 56 { 57 __raw_writel(val, eth->base + reg); 58 } 59 60 u32 mtk_r32(struct mtk_eth *eth, unsigned reg) 61 { 62 return __raw_readl(eth->base + reg); 63 } 64 65 static int mtk_mdio_busy_wait(struct mtk_eth *eth) 66 { 67 unsigned long t_start = jiffies; 68 69 while (1) { 70 if (!(mtk_r32(eth, MTK_PHY_IAC) & PHY_IAC_ACCESS)) 71 return 0; 72 if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT)) 73 break; 74 usleep_range(10, 20); 75 } 76 77 dev_err(eth->dev, "mdio: MDIO timeout\n"); 78 return -1; 79 } 80 81 static u32 _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, 82 u32 phy_register, u32 write_data) 83 { 84 if (mtk_mdio_busy_wait(eth)) 85 return -1; 86 87 write_data &= 0xffff; 88 89 mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE | 90 (phy_register << PHY_IAC_REG_SHIFT) | 91 (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data, 92 MTK_PHY_IAC); 93 94 if (mtk_mdio_busy_wait(eth)) 95 return -1; 96 97 return 0; 98 } 99 100 static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg) 101 { 102 u32 d; 103 104 if (mtk_mdio_busy_wait(eth)) 105 return 0xffff; 106 107 mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ | 108 (phy_reg << PHY_IAC_REG_SHIFT) | 109 (phy_addr << PHY_IAC_ADDR_SHIFT), 110 MTK_PHY_IAC); 111 112 if (mtk_mdio_busy_wait(eth)) 113 return 0xffff; 114 115 d = mtk_r32(eth, MTK_PHY_IAC) & 0xffff; 116 117 return d; 118 } 119 120 static int mtk_mdio_write(struct mii_bus *bus, int phy_addr, 121 int phy_reg, u16 val) 122 { 123 struct mtk_eth *eth = bus->priv; 124 125 return _mtk_mdio_write(eth, phy_addr, phy_reg, val); 126 } 127 128 static int mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg) 129 { 130 struct mtk_eth *eth = bus->priv; 131 132 return _mtk_mdio_read(eth, phy_addr, phy_reg); 133 } 134 135 static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth, int speed) 136 { 137 u32 val; 138 int ret; 139 140 val = (speed == SPEED_1000) ? 141 INTF_MODE_RGMII_1000 : INTF_MODE_RGMII_10_100; 142 mtk_w32(eth, val, INTF_MODE); 143 144 regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0, 145 ETHSYS_TRGMII_CLK_SEL362_5, 146 ETHSYS_TRGMII_CLK_SEL362_5); 147 148 val = (speed == SPEED_1000) ? 250000000 : 500000000; 149 ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val); 150 if (ret) 151 dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret); 152 153 val = (speed == SPEED_1000) ? 154 RCK_CTRL_RGMII_1000 : RCK_CTRL_RGMII_10_100; 155 mtk_w32(eth, val, TRGMII_RCK_CTRL); 156 157 val = (speed == SPEED_1000) ? 158 TCK_CTRL_RGMII_1000 : TCK_CTRL_RGMII_10_100; 159 mtk_w32(eth, val, TRGMII_TCK_CTRL); 160 } 161 162 static void mtk_gmac_sgmii_hw_setup(struct mtk_eth *eth, int mac_id) 163 { 164 u32 val; 165 166 /* Setup the link timer and QPHY power up inside SGMIISYS */ 167 regmap_write(eth->sgmiisys, SGMSYS_PCS_LINK_TIMER, 168 SGMII_LINK_TIMER_DEFAULT); 169 170 regmap_read(eth->sgmiisys, SGMSYS_SGMII_MODE, &val); 171 val |= SGMII_REMOTE_FAULT_DIS; 172 regmap_write(eth->sgmiisys, SGMSYS_SGMII_MODE, val); 173 174 regmap_read(eth->sgmiisys, SGMSYS_PCS_CONTROL_1, &val); 175 val |= SGMII_AN_RESTART; 176 regmap_write(eth->sgmiisys, SGMSYS_PCS_CONTROL_1, val); 177 178 regmap_read(eth->sgmiisys, SGMSYS_QPHY_PWR_STATE_CTRL, &val); 179 val &= ~SGMII_PHYA_PWD; 180 regmap_write(eth->sgmiisys, SGMSYS_QPHY_PWR_STATE_CTRL, val); 181 182 /* Determine MUX for which GMAC uses the SGMII interface */ 183 if (MTK_HAS_CAPS(eth->soc->caps, MTK_DUAL_GMAC_SHARED_SGMII)) { 184 regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); 185 val &= ~SYSCFG0_SGMII_MASK; 186 val |= !mac_id ? SYSCFG0_SGMII_GMAC1 : SYSCFG0_SGMII_GMAC2; 187 regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); 188 189 dev_info(eth->dev, "setup shared sgmii for gmac=%d\n", 190 mac_id); 191 } 192 193 /* Setup the GMAC1 going through SGMII path when SoC also support 194 * ESW on GMAC1 195 */ 196 if (MTK_HAS_CAPS(eth->soc->caps, MTK_GMAC1_ESW | MTK_GMAC1_SGMII) && 197 !mac_id) { 198 mtk_w32(eth, 0, MTK_MAC_MISC); 199 dev_info(eth->dev, "setup gmac1 going through sgmii"); 200 } 201 } 202 203 static void mtk_phy_link_adjust(struct net_device *dev) 204 { 205 struct mtk_mac *mac = netdev_priv(dev); 206 u16 lcl_adv = 0, rmt_adv = 0; 207 u8 flowctrl; 208 u32 mcr = MAC_MCR_MAX_RX_1536 | MAC_MCR_IPG_CFG | 209 MAC_MCR_FORCE_MODE | MAC_MCR_TX_EN | 210 MAC_MCR_RX_EN | MAC_MCR_BACKOFF_EN | 211 MAC_MCR_BACKPR_EN; 212 213 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 214 return; 215 216 switch (dev->phydev->speed) { 217 case SPEED_1000: 218 mcr |= MAC_MCR_SPEED_1000; 219 break; 220 case SPEED_100: 221 mcr |= MAC_MCR_SPEED_100; 222 break; 223 } 224 225 if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GMAC1_TRGMII) && 226 !mac->id && !mac->trgmii) 227 mtk_gmac0_rgmii_adjust(mac->hw, dev->phydev->speed); 228 229 if (dev->phydev->link) 230 mcr |= MAC_MCR_FORCE_LINK; 231 232 if (dev->phydev->duplex) { 233 mcr |= MAC_MCR_FORCE_DPX; 234 235 if (dev->phydev->pause) 236 rmt_adv = LPA_PAUSE_CAP; 237 if (dev->phydev->asym_pause) 238 rmt_adv |= LPA_PAUSE_ASYM; 239 240 lcl_adv = linkmode_adv_to_lcl_adv_t(dev->phydev->advertising); 241 flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv); 242 243 if (flowctrl & FLOW_CTRL_TX) 244 mcr |= MAC_MCR_FORCE_TX_FC; 245 if (flowctrl & FLOW_CTRL_RX) 246 mcr |= MAC_MCR_FORCE_RX_FC; 247 248 netif_dbg(mac->hw, link, dev, "rx pause %s, tx pause %s\n", 249 flowctrl & FLOW_CTRL_RX ? "enabled" : "disabled", 250 flowctrl & FLOW_CTRL_TX ? "enabled" : "disabled"); 251 } 252 253 mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id)); 254 255 if (!of_phy_is_fixed_link(mac->of_node)) 256 phy_print_status(dev->phydev); 257 } 258 259 static int mtk_phy_connect_node(struct mtk_eth *eth, struct mtk_mac *mac, 260 struct device_node *phy_node) 261 { 262 struct phy_device *phydev; 263 int phy_mode; 264 265 phy_mode = of_get_phy_mode(phy_node); 266 if (phy_mode < 0) { 267 dev_err(eth->dev, "incorrect phy-mode %d\n", phy_mode); 268 return -EINVAL; 269 } 270 271 phydev = of_phy_connect(eth->netdev[mac->id], phy_node, 272 mtk_phy_link_adjust, 0, phy_mode); 273 if (!phydev) { 274 dev_err(eth->dev, "could not connect to PHY\n"); 275 return -ENODEV; 276 } 277 278 dev_info(eth->dev, 279 "connected mac %d to PHY at %s [uid=%08x, driver=%s]\n", 280 mac->id, phydev_name(phydev), phydev->phy_id, 281 phydev->drv->name); 282 283 return 0; 284 } 285 286 static int mtk_phy_connect(struct net_device *dev) 287 { 288 struct mtk_mac *mac = netdev_priv(dev); 289 struct mtk_eth *eth; 290 struct device_node *np; 291 u32 val; 292 293 eth = mac->hw; 294 np = of_parse_phandle(mac->of_node, "phy-handle", 0); 295 if (!np && of_phy_is_fixed_link(mac->of_node)) 296 if (!of_phy_register_fixed_link(mac->of_node)) 297 np = of_node_get(mac->of_node); 298 if (!np) 299 return -ENODEV; 300 301 mac->ge_mode = 0; 302 switch (of_get_phy_mode(np)) { 303 case PHY_INTERFACE_MODE_TRGMII: 304 mac->trgmii = true; 305 case PHY_INTERFACE_MODE_RGMII_TXID: 306 case PHY_INTERFACE_MODE_RGMII_RXID: 307 case PHY_INTERFACE_MODE_RGMII_ID: 308 case PHY_INTERFACE_MODE_RGMII: 309 break; 310 case PHY_INTERFACE_MODE_SGMII: 311 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) 312 mtk_gmac_sgmii_hw_setup(eth, mac->id); 313 break; 314 case PHY_INTERFACE_MODE_MII: 315 mac->ge_mode = 1; 316 break; 317 case PHY_INTERFACE_MODE_REVMII: 318 mac->ge_mode = 2; 319 break; 320 case PHY_INTERFACE_MODE_RMII: 321 if (!mac->id) 322 goto err_phy; 323 mac->ge_mode = 3; 324 break; 325 default: 326 goto err_phy; 327 } 328 329 /* put the gmac into the right mode */ 330 regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); 331 val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, mac->id); 332 val |= SYSCFG0_GE_MODE(mac->ge_mode, mac->id); 333 regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); 334 335 /* couple phydev to net_device */ 336 if (mtk_phy_connect_node(eth, mac, np)) 337 goto err_phy; 338 339 of_node_put(np); 340 341 return 0; 342 343 err_phy: 344 if (of_phy_is_fixed_link(mac->of_node)) 345 of_phy_deregister_fixed_link(mac->of_node); 346 of_node_put(np); 347 dev_err(eth->dev, "%s: invalid phy\n", __func__); 348 return -EINVAL; 349 } 350 351 static int mtk_mdio_init(struct mtk_eth *eth) 352 { 353 struct device_node *mii_np; 354 int ret; 355 356 mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus"); 357 if (!mii_np) { 358 dev_err(eth->dev, "no %s child node found", "mdio-bus"); 359 return -ENODEV; 360 } 361 362 if (!of_device_is_available(mii_np)) { 363 ret = -ENODEV; 364 goto err_put_node; 365 } 366 367 eth->mii_bus = devm_mdiobus_alloc(eth->dev); 368 if (!eth->mii_bus) { 369 ret = -ENOMEM; 370 goto err_put_node; 371 } 372 373 eth->mii_bus->name = "mdio"; 374 eth->mii_bus->read = mtk_mdio_read; 375 eth->mii_bus->write = mtk_mdio_write; 376 eth->mii_bus->priv = eth; 377 eth->mii_bus->parent = eth->dev; 378 379 snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%pOFn", mii_np); 380 ret = of_mdiobus_register(eth->mii_bus, mii_np); 381 382 err_put_node: 383 of_node_put(mii_np); 384 return ret; 385 } 386 387 static void mtk_mdio_cleanup(struct mtk_eth *eth) 388 { 389 if (!eth->mii_bus) 390 return; 391 392 mdiobus_unregister(eth->mii_bus); 393 } 394 395 static inline void mtk_tx_irq_disable(struct mtk_eth *eth, u32 mask) 396 { 397 unsigned long flags; 398 u32 val; 399 400 spin_lock_irqsave(ð->tx_irq_lock, flags); 401 val = mtk_r32(eth, MTK_QDMA_INT_MASK); 402 mtk_w32(eth, val & ~mask, MTK_QDMA_INT_MASK); 403 spin_unlock_irqrestore(ð->tx_irq_lock, flags); 404 } 405 406 static inline void mtk_tx_irq_enable(struct mtk_eth *eth, u32 mask) 407 { 408 unsigned long flags; 409 u32 val; 410 411 spin_lock_irqsave(ð->tx_irq_lock, flags); 412 val = mtk_r32(eth, MTK_QDMA_INT_MASK); 413 mtk_w32(eth, val | mask, MTK_QDMA_INT_MASK); 414 spin_unlock_irqrestore(ð->tx_irq_lock, flags); 415 } 416 417 static inline void mtk_rx_irq_disable(struct mtk_eth *eth, u32 mask) 418 { 419 unsigned long flags; 420 u32 val; 421 422 spin_lock_irqsave(ð->rx_irq_lock, flags); 423 val = mtk_r32(eth, MTK_PDMA_INT_MASK); 424 mtk_w32(eth, val & ~mask, MTK_PDMA_INT_MASK); 425 spin_unlock_irqrestore(ð->rx_irq_lock, flags); 426 } 427 428 static inline void mtk_rx_irq_enable(struct mtk_eth *eth, u32 mask) 429 { 430 unsigned long flags; 431 u32 val; 432 433 spin_lock_irqsave(ð->rx_irq_lock, flags); 434 val = mtk_r32(eth, MTK_PDMA_INT_MASK); 435 mtk_w32(eth, val | mask, MTK_PDMA_INT_MASK); 436 spin_unlock_irqrestore(ð->rx_irq_lock, flags); 437 } 438 439 static int mtk_set_mac_address(struct net_device *dev, void *p) 440 { 441 int ret = eth_mac_addr(dev, p); 442 struct mtk_mac *mac = netdev_priv(dev); 443 const char *macaddr = dev->dev_addr; 444 445 if (ret) 446 return ret; 447 448 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 449 return -EBUSY; 450 451 spin_lock_bh(&mac->hw->page_lock); 452 mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1], 453 MTK_GDMA_MAC_ADRH(mac->id)); 454 mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) | 455 (macaddr[4] << 8) | macaddr[5], 456 MTK_GDMA_MAC_ADRL(mac->id)); 457 spin_unlock_bh(&mac->hw->page_lock); 458 459 return 0; 460 } 461 462 void mtk_stats_update_mac(struct mtk_mac *mac) 463 { 464 struct mtk_hw_stats *hw_stats = mac->hw_stats; 465 unsigned int base = MTK_GDM1_TX_GBCNT; 466 u64 stats; 467 468 base += hw_stats->reg_offset; 469 470 u64_stats_update_begin(&hw_stats->syncp); 471 472 hw_stats->rx_bytes += mtk_r32(mac->hw, base); 473 stats = mtk_r32(mac->hw, base + 0x04); 474 if (stats) 475 hw_stats->rx_bytes += (stats << 32); 476 hw_stats->rx_packets += mtk_r32(mac->hw, base + 0x08); 477 hw_stats->rx_overflow += mtk_r32(mac->hw, base + 0x10); 478 hw_stats->rx_fcs_errors += mtk_r32(mac->hw, base + 0x14); 479 hw_stats->rx_short_errors += mtk_r32(mac->hw, base + 0x18); 480 hw_stats->rx_long_errors += mtk_r32(mac->hw, base + 0x1c); 481 hw_stats->rx_checksum_errors += mtk_r32(mac->hw, base + 0x20); 482 hw_stats->rx_flow_control_packets += 483 mtk_r32(mac->hw, base + 0x24); 484 hw_stats->tx_skip += mtk_r32(mac->hw, base + 0x28); 485 hw_stats->tx_collisions += mtk_r32(mac->hw, base + 0x2c); 486 hw_stats->tx_bytes += mtk_r32(mac->hw, base + 0x30); 487 stats = mtk_r32(mac->hw, base + 0x34); 488 if (stats) 489 hw_stats->tx_bytes += (stats << 32); 490 hw_stats->tx_packets += mtk_r32(mac->hw, base + 0x38); 491 u64_stats_update_end(&hw_stats->syncp); 492 } 493 494 static void mtk_stats_update(struct mtk_eth *eth) 495 { 496 int i; 497 498 for (i = 0; i < MTK_MAC_COUNT; i++) { 499 if (!eth->mac[i] || !eth->mac[i]->hw_stats) 500 continue; 501 if (spin_trylock(ð->mac[i]->hw_stats->stats_lock)) { 502 mtk_stats_update_mac(eth->mac[i]); 503 spin_unlock(ð->mac[i]->hw_stats->stats_lock); 504 } 505 } 506 } 507 508 static void mtk_get_stats64(struct net_device *dev, 509 struct rtnl_link_stats64 *storage) 510 { 511 struct mtk_mac *mac = netdev_priv(dev); 512 struct mtk_hw_stats *hw_stats = mac->hw_stats; 513 unsigned int start; 514 515 if (netif_running(dev) && netif_device_present(dev)) { 516 if (spin_trylock_bh(&hw_stats->stats_lock)) { 517 mtk_stats_update_mac(mac); 518 spin_unlock_bh(&hw_stats->stats_lock); 519 } 520 } 521 522 do { 523 start = u64_stats_fetch_begin_irq(&hw_stats->syncp); 524 storage->rx_packets = hw_stats->rx_packets; 525 storage->tx_packets = hw_stats->tx_packets; 526 storage->rx_bytes = hw_stats->rx_bytes; 527 storage->tx_bytes = hw_stats->tx_bytes; 528 storage->collisions = hw_stats->tx_collisions; 529 storage->rx_length_errors = hw_stats->rx_short_errors + 530 hw_stats->rx_long_errors; 531 storage->rx_over_errors = hw_stats->rx_overflow; 532 storage->rx_crc_errors = hw_stats->rx_fcs_errors; 533 storage->rx_errors = hw_stats->rx_checksum_errors; 534 storage->tx_aborted_errors = hw_stats->tx_skip; 535 } while (u64_stats_fetch_retry_irq(&hw_stats->syncp, start)); 536 537 storage->tx_errors = dev->stats.tx_errors; 538 storage->rx_dropped = dev->stats.rx_dropped; 539 storage->tx_dropped = dev->stats.tx_dropped; 540 } 541 542 static inline int mtk_max_frag_size(int mtu) 543 { 544 /* make sure buf_size will be at least MTK_MAX_RX_LENGTH */ 545 if (mtu + MTK_RX_ETH_HLEN < MTK_MAX_RX_LENGTH) 546 mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN; 547 548 return SKB_DATA_ALIGN(MTK_RX_HLEN + mtu) + 549 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 550 } 551 552 static inline int mtk_max_buf_size(int frag_size) 553 { 554 int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN - 555 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 556 557 WARN_ON(buf_size < MTK_MAX_RX_LENGTH); 558 559 return buf_size; 560 } 561 562 static inline void mtk_rx_get_desc(struct mtk_rx_dma *rxd, 563 struct mtk_rx_dma *dma_rxd) 564 { 565 rxd->rxd1 = READ_ONCE(dma_rxd->rxd1); 566 rxd->rxd2 = READ_ONCE(dma_rxd->rxd2); 567 rxd->rxd3 = READ_ONCE(dma_rxd->rxd3); 568 rxd->rxd4 = READ_ONCE(dma_rxd->rxd4); 569 } 570 571 /* the qdma core needs scratch memory to be setup */ 572 static int mtk_init_fq_dma(struct mtk_eth *eth) 573 { 574 dma_addr_t phy_ring_tail; 575 int cnt = MTK_DMA_SIZE; 576 dma_addr_t dma_addr; 577 int i; 578 579 eth->scratch_ring = dma_alloc_coherent(eth->dev, 580 cnt * sizeof(struct mtk_tx_dma), 581 ð->phy_scratch_ring, 582 GFP_ATOMIC); 583 if (unlikely(!eth->scratch_ring)) 584 return -ENOMEM; 585 586 eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE, 587 GFP_KERNEL); 588 if (unlikely(!eth->scratch_head)) 589 return -ENOMEM; 590 591 dma_addr = dma_map_single(eth->dev, 592 eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE, 593 DMA_FROM_DEVICE); 594 if (unlikely(dma_mapping_error(eth->dev, dma_addr))) 595 return -ENOMEM; 596 597 phy_ring_tail = eth->phy_scratch_ring + 598 (sizeof(struct mtk_tx_dma) * (cnt - 1)); 599 600 for (i = 0; i < cnt; i++) { 601 eth->scratch_ring[i].txd1 = 602 (dma_addr + (i * MTK_QDMA_PAGE_SIZE)); 603 if (i < cnt - 1) 604 eth->scratch_ring[i].txd2 = (eth->phy_scratch_ring + 605 ((i + 1) * sizeof(struct mtk_tx_dma))); 606 eth->scratch_ring[i].txd3 = TX_DMA_SDL(MTK_QDMA_PAGE_SIZE); 607 } 608 609 mtk_w32(eth, eth->phy_scratch_ring, MTK_QDMA_FQ_HEAD); 610 mtk_w32(eth, phy_ring_tail, MTK_QDMA_FQ_TAIL); 611 mtk_w32(eth, (cnt << 16) | cnt, MTK_QDMA_FQ_CNT); 612 mtk_w32(eth, MTK_QDMA_PAGE_SIZE << 16, MTK_QDMA_FQ_BLEN); 613 614 return 0; 615 } 616 617 static inline void *mtk_qdma_phys_to_virt(struct mtk_tx_ring *ring, u32 desc) 618 { 619 void *ret = ring->dma; 620 621 return ret + (desc - ring->phys); 622 } 623 624 static inline struct mtk_tx_buf *mtk_desc_to_tx_buf(struct mtk_tx_ring *ring, 625 struct mtk_tx_dma *txd) 626 { 627 int idx = txd - ring->dma; 628 629 return &ring->buf[idx]; 630 } 631 632 static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf) 633 { 634 if (tx_buf->flags & MTK_TX_FLAGS_SINGLE0) { 635 dma_unmap_single(eth->dev, 636 dma_unmap_addr(tx_buf, dma_addr0), 637 dma_unmap_len(tx_buf, dma_len0), 638 DMA_TO_DEVICE); 639 } else if (tx_buf->flags & MTK_TX_FLAGS_PAGE0) { 640 dma_unmap_page(eth->dev, 641 dma_unmap_addr(tx_buf, dma_addr0), 642 dma_unmap_len(tx_buf, dma_len0), 643 DMA_TO_DEVICE); 644 } 645 tx_buf->flags = 0; 646 if (tx_buf->skb && 647 (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC)) 648 dev_kfree_skb_any(tx_buf->skb); 649 tx_buf->skb = NULL; 650 } 651 652 static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev, 653 int tx_num, struct mtk_tx_ring *ring, bool gso) 654 { 655 struct mtk_mac *mac = netdev_priv(dev); 656 struct mtk_eth *eth = mac->hw; 657 struct mtk_tx_dma *itxd, *txd; 658 struct mtk_tx_buf *itx_buf, *tx_buf; 659 dma_addr_t mapped_addr; 660 unsigned int nr_frags; 661 int i, n_desc = 1; 662 u32 txd4 = 0, fport; 663 664 itxd = ring->next_free; 665 if (itxd == ring->last_free) 666 return -ENOMEM; 667 668 /* set the forward port */ 669 fport = (mac->id + 1) << TX_DMA_FPORT_SHIFT; 670 txd4 |= fport; 671 672 itx_buf = mtk_desc_to_tx_buf(ring, itxd); 673 memset(itx_buf, 0, sizeof(*itx_buf)); 674 675 if (gso) 676 txd4 |= TX_DMA_TSO; 677 678 /* TX Checksum offload */ 679 if (skb->ip_summed == CHECKSUM_PARTIAL) 680 txd4 |= TX_DMA_CHKSUM; 681 682 /* VLAN header offload */ 683 if (skb_vlan_tag_present(skb)) 684 txd4 |= TX_DMA_INS_VLAN | skb_vlan_tag_get(skb); 685 686 mapped_addr = dma_map_single(eth->dev, skb->data, 687 skb_headlen(skb), DMA_TO_DEVICE); 688 if (unlikely(dma_mapping_error(eth->dev, mapped_addr))) 689 return -ENOMEM; 690 691 WRITE_ONCE(itxd->txd1, mapped_addr); 692 itx_buf->flags |= MTK_TX_FLAGS_SINGLE0; 693 itx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 : 694 MTK_TX_FLAGS_FPORT1; 695 dma_unmap_addr_set(itx_buf, dma_addr0, mapped_addr); 696 dma_unmap_len_set(itx_buf, dma_len0, skb_headlen(skb)); 697 698 /* TX SG offload */ 699 txd = itxd; 700 nr_frags = skb_shinfo(skb)->nr_frags; 701 for (i = 0; i < nr_frags; i++) { 702 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 703 unsigned int offset = 0; 704 int frag_size = skb_frag_size(frag); 705 706 while (frag_size) { 707 bool last_frag = false; 708 unsigned int frag_map_size; 709 710 txd = mtk_qdma_phys_to_virt(ring, txd->txd2); 711 if (txd == ring->last_free) 712 goto err_dma; 713 714 n_desc++; 715 frag_map_size = min(frag_size, MTK_TX_DMA_BUF_LEN); 716 mapped_addr = skb_frag_dma_map(eth->dev, frag, offset, 717 frag_map_size, 718 DMA_TO_DEVICE); 719 if (unlikely(dma_mapping_error(eth->dev, mapped_addr))) 720 goto err_dma; 721 722 if (i == nr_frags - 1 && 723 (frag_size - frag_map_size) == 0) 724 last_frag = true; 725 726 WRITE_ONCE(txd->txd1, mapped_addr); 727 WRITE_ONCE(txd->txd3, (TX_DMA_SWC | 728 TX_DMA_PLEN0(frag_map_size) | 729 last_frag * TX_DMA_LS0)); 730 WRITE_ONCE(txd->txd4, fport); 731 732 tx_buf = mtk_desc_to_tx_buf(ring, txd); 733 memset(tx_buf, 0, sizeof(*tx_buf)); 734 tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC; 735 tx_buf->flags |= MTK_TX_FLAGS_PAGE0; 736 tx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 : 737 MTK_TX_FLAGS_FPORT1; 738 739 dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); 740 dma_unmap_len_set(tx_buf, dma_len0, frag_map_size); 741 frag_size -= frag_map_size; 742 offset += frag_map_size; 743 } 744 } 745 746 /* store skb to cleanup */ 747 itx_buf->skb = skb; 748 749 WRITE_ONCE(itxd->txd4, txd4); 750 WRITE_ONCE(itxd->txd3, (TX_DMA_SWC | TX_DMA_PLEN0(skb_headlen(skb)) | 751 (!nr_frags * TX_DMA_LS0))); 752 753 netdev_sent_queue(dev, skb->len); 754 skb_tx_timestamp(skb); 755 756 ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2); 757 atomic_sub(n_desc, &ring->free_count); 758 759 /* make sure that all changes to the dma ring are flushed before we 760 * continue 761 */ 762 wmb(); 763 764 if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) || 765 !netdev_xmit_more()) 766 mtk_w32(eth, txd->txd2, MTK_QTX_CTX_PTR); 767 768 return 0; 769 770 err_dma: 771 do { 772 tx_buf = mtk_desc_to_tx_buf(ring, itxd); 773 774 /* unmap dma */ 775 mtk_tx_unmap(eth, tx_buf); 776 777 itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; 778 itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2); 779 } while (itxd != txd); 780 781 return -ENOMEM; 782 } 783 784 static inline int mtk_cal_txd_req(struct sk_buff *skb) 785 { 786 int i, nfrags; 787 struct skb_frag_struct *frag; 788 789 nfrags = 1; 790 if (skb_is_gso(skb)) { 791 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 792 frag = &skb_shinfo(skb)->frags[i]; 793 nfrags += DIV_ROUND_UP(frag->size, MTK_TX_DMA_BUF_LEN); 794 } 795 } else { 796 nfrags += skb_shinfo(skb)->nr_frags; 797 } 798 799 return nfrags; 800 } 801 802 static int mtk_queue_stopped(struct mtk_eth *eth) 803 { 804 int i; 805 806 for (i = 0; i < MTK_MAC_COUNT; i++) { 807 if (!eth->netdev[i]) 808 continue; 809 if (netif_queue_stopped(eth->netdev[i])) 810 return 1; 811 } 812 813 return 0; 814 } 815 816 static void mtk_wake_queue(struct mtk_eth *eth) 817 { 818 int i; 819 820 for (i = 0; i < MTK_MAC_COUNT; i++) { 821 if (!eth->netdev[i]) 822 continue; 823 netif_wake_queue(eth->netdev[i]); 824 } 825 } 826 827 static void mtk_stop_queue(struct mtk_eth *eth) 828 { 829 int i; 830 831 for (i = 0; i < MTK_MAC_COUNT; i++) { 832 if (!eth->netdev[i]) 833 continue; 834 netif_stop_queue(eth->netdev[i]); 835 } 836 } 837 838 static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev) 839 { 840 struct mtk_mac *mac = netdev_priv(dev); 841 struct mtk_eth *eth = mac->hw; 842 struct mtk_tx_ring *ring = ð->tx_ring; 843 struct net_device_stats *stats = &dev->stats; 844 bool gso = false; 845 int tx_num; 846 847 /* normally we can rely on the stack not calling this more than once, 848 * however we have 2 queues running on the same ring so we need to lock 849 * the ring access 850 */ 851 spin_lock(ð->page_lock); 852 853 if (unlikely(test_bit(MTK_RESETTING, ð->state))) 854 goto drop; 855 856 tx_num = mtk_cal_txd_req(skb); 857 if (unlikely(atomic_read(&ring->free_count) <= tx_num)) { 858 mtk_stop_queue(eth); 859 netif_err(eth, tx_queued, dev, 860 "Tx Ring full when queue awake!\n"); 861 spin_unlock(ð->page_lock); 862 return NETDEV_TX_BUSY; 863 } 864 865 /* TSO: fill MSS info in tcp checksum field */ 866 if (skb_is_gso(skb)) { 867 if (skb_cow_head(skb, 0)) { 868 netif_warn(eth, tx_err, dev, 869 "GSO expand head fail.\n"); 870 goto drop; 871 } 872 873 if (skb_shinfo(skb)->gso_type & 874 (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) { 875 gso = true; 876 tcp_hdr(skb)->check = htons(skb_shinfo(skb)->gso_size); 877 } 878 } 879 880 if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0) 881 goto drop; 882 883 if (unlikely(atomic_read(&ring->free_count) <= ring->thresh)) 884 mtk_stop_queue(eth); 885 886 spin_unlock(ð->page_lock); 887 888 return NETDEV_TX_OK; 889 890 drop: 891 spin_unlock(ð->page_lock); 892 stats->tx_dropped++; 893 dev_kfree_skb_any(skb); 894 return NETDEV_TX_OK; 895 } 896 897 static struct mtk_rx_ring *mtk_get_rx_ring(struct mtk_eth *eth) 898 { 899 int i; 900 struct mtk_rx_ring *ring; 901 int idx; 902 903 if (!eth->hwlro) 904 return ð->rx_ring[0]; 905 906 for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) { 907 ring = ð->rx_ring[i]; 908 idx = NEXT_RX_DESP_IDX(ring->calc_idx, ring->dma_size); 909 if (ring->dma[idx].rxd2 & RX_DMA_DONE) { 910 ring->calc_idx_update = true; 911 return ring; 912 } 913 } 914 915 return NULL; 916 } 917 918 static void mtk_update_rx_cpu_idx(struct mtk_eth *eth) 919 { 920 struct mtk_rx_ring *ring; 921 int i; 922 923 if (!eth->hwlro) { 924 ring = ð->rx_ring[0]; 925 mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg); 926 } else { 927 for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) { 928 ring = ð->rx_ring[i]; 929 if (ring->calc_idx_update) { 930 ring->calc_idx_update = false; 931 mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg); 932 } 933 } 934 } 935 } 936 937 static int mtk_poll_rx(struct napi_struct *napi, int budget, 938 struct mtk_eth *eth) 939 { 940 struct mtk_rx_ring *ring; 941 int idx; 942 struct sk_buff *skb; 943 u8 *data, *new_data; 944 struct mtk_rx_dma *rxd, trxd; 945 int done = 0; 946 947 while (done < budget) { 948 struct net_device *netdev; 949 unsigned int pktlen; 950 dma_addr_t dma_addr; 951 int mac = 0; 952 953 ring = mtk_get_rx_ring(eth); 954 if (unlikely(!ring)) 955 goto rx_done; 956 957 idx = NEXT_RX_DESP_IDX(ring->calc_idx, ring->dma_size); 958 rxd = &ring->dma[idx]; 959 data = ring->data[idx]; 960 961 mtk_rx_get_desc(&trxd, rxd); 962 if (!(trxd.rxd2 & RX_DMA_DONE)) 963 break; 964 965 /* find out which mac the packet come from. values start at 1 */ 966 mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) & 967 RX_DMA_FPORT_MASK; 968 mac--; 969 970 if (unlikely(mac < 0 || mac >= MTK_MAC_COUNT || 971 !eth->netdev[mac])) 972 goto release_desc; 973 974 netdev = eth->netdev[mac]; 975 976 if (unlikely(test_bit(MTK_RESETTING, ð->state))) 977 goto release_desc; 978 979 /* alloc new buffer */ 980 new_data = napi_alloc_frag(ring->frag_size); 981 if (unlikely(!new_data)) { 982 netdev->stats.rx_dropped++; 983 goto release_desc; 984 } 985 dma_addr = dma_map_single(eth->dev, 986 new_data + NET_SKB_PAD, 987 ring->buf_size, 988 DMA_FROM_DEVICE); 989 if (unlikely(dma_mapping_error(eth->dev, dma_addr))) { 990 skb_free_frag(new_data); 991 netdev->stats.rx_dropped++; 992 goto release_desc; 993 } 994 995 /* receive data */ 996 skb = build_skb(data, ring->frag_size); 997 if (unlikely(!skb)) { 998 skb_free_frag(new_data); 999 netdev->stats.rx_dropped++; 1000 goto release_desc; 1001 } 1002 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); 1003 1004 dma_unmap_single(eth->dev, trxd.rxd1, 1005 ring->buf_size, DMA_FROM_DEVICE); 1006 pktlen = RX_DMA_GET_PLEN0(trxd.rxd2); 1007 skb->dev = netdev; 1008 skb_put(skb, pktlen); 1009 if (trxd.rxd4 & RX_DMA_L4_VALID) 1010 skb->ip_summed = CHECKSUM_UNNECESSARY; 1011 else 1012 skb_checksum_none_assert(skb); 1013 skb->protocol = eth_type_trans(skb, netdev); 1014 1015 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX && 1016 RX_DMA_VID(trxd.rxd3)) 1017 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1018 RX_DMA_VID(trxd.rxd3)); 1019 skb_record_rx_queue(skb, 0); 1020 napi_gro_receive(napi, skb); 1021 1022 ring->data[idx] = new_data; 1023 rxd->rxd1 = (unsigned int)dma_addr; 1024 1025 release_desc: 1026 rxd->rxd2 = RX_DMA_PLEN0(ring->buf_size); 1027 1028 ring->calc_idx = idx; 1029 1030 done++; 1031 } 1032 1033 rx_done: 1034 if (done) { 1035 /* make sure that all changes to the dma ring are flushed before 1036 * we continue 1037 */ 1038 wmb(); 1039 mtk_update_rx_cpu_idx(eth); 1040 } 1041 1042 return done; 1043 } 1044 1045 static int mtk_poll_tx(struct mtk_eth *eth, int budget) 1046 { 1047 struct mtk_tx_ring *ring = ð->tx_ring; 1048 struct mtk_tx_dma *desc; 1049 struct sk_buff *skb; 1050 struct mtk_tx_buf *tx_buf; 1051 unsigned int done[MTK_MAX_DEVS]; 1052 unsigned int bytes[MTK_MAX_DEVS]; 1053 u32 cpu, dma; 1054 int total = 0, i; 1055 1056 memset(done, 0, sizeof(done)); 1057 memset(bytes, 0, sizeof(bytes)); 1058 1059 cpu = mtk_r32(eth, MTK_QTX_CRX_PTR); 1060 dma = mtk_r32(eth, MTK_QTX_DRX_PTR); 1061 1062 desc = mtk_qdma_phys_to_virt(ring, cpu); 1063 1064 while ((cpu != dma) && budget) { 1065 u32 next_cpu = desc->txd2; 1066 int mac = 0; 1067 1068 desc = mtk_qdma_phys_to_virt(ring, desc->txd2); 1069 if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0) 1070 break; 1071 1072 tx_buf = mtk_desc_to_tx_buf(ring, desc); 1073 if (tx_buf->flags & MTK_TX_FLAGS_FPORT1) 1074 mac = 1; 1075 1076 skb = tx_buf->skb; 1077 if (!skb) 1078 break; 1079 1080 if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) { 1081 bytes[mac] += skb->len; 1082 done[mac]++; 1083 budget--; 1084 } 1085 mtk_tx_unmap(eth, tx_buf); 1086 1087 ring->last_free = desc; 1088 atomic_inc(&ring->free_count); 1089 1090 cpu = next_cpu; 1091 } 1092 1093 mtk_w32(eth, cpu, MTK_QTX_CRX_PTR); 1094 1095 for (i = 0; i < MTK_MAC_COUNT; i++) { 1096 if (!eth->netdev[i] || !done[i]) 1097 continue; 1098 netdev_completed_queue(eth->netdev[i], done[i], bytes[i]); 1099 total += done[i]; 1100 } 1101 1102 if (mtk_queue_stopped(eth) && 1103 (atomic_read(&ring->free_count) > ring->thresh)) 1104 mtk_wake_queue(eth); 1105 1106 return total; 1107 } 1108 1109 static void mtk_handle_status_irq(struct mtk_eth *eth) 1110 { 1111 u32 status2 = mtk_r32(eth, MTK_INT_STATUS2); 1112 1113 if (unlikely(status2 & (MTK_GDM1_AF | MTK_GDM2_AF))) { 1114 mtk_stats_update(eth); 1115 mtk_w32(eth, (MTK_GDM1_AF | MTK_GDM2_AF), 1116 MTK_INT_STATUS2); 1117 } 1118 } 1119 1120 static int mtk_napi_tx(struct napi_struct *napi, int budget) 1121 { 1122 struct mtk_eth *eth = container_of(napi, struct mtk_eth, tx_napi); 1123 u32 status, mask; 1124 int tx_done = 0; 1125 1126 mtk_handle_status_irq(eth); 1127 mtk_w32(eth, MTK_TX_DONE_INT, MTK_QMTK_INT_STATUS); 1128 tx_done = mtk_poll_tx(eth, budget); 1129 1130 if (unlikely(netif_msg_intr(eth))) { 1131 status = mtk_r32(eth, MTK_QMTK_INT_STATUS); 1132 mask = mtk_r32(eth, MTK_QDMA_INT_MASK); 1133 dev_info(eth->dev, 1134 "done tx %d, intr 0x%08x/0x%x\n", 1135 tx_done, status, mask); 1136 } 1137 1138 if (tx_done == budget) 1139 return budget; 1140 1141 status = mtk_r32(eth, MTK_QMTK_INT_STATUS); 1142 if (status & MTK_TX_DONE_INT) 1143 return budget; 1144 1145 napi_complete(napi); 1146 mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); 1147 1148 return tx_done; 1149 } 1150 1151 static int mtk_napi_rx(struct napi_struct *napi, int budget) 1152 { 1153 struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi); 1154 u32 status, mask; 1155 int rx_done = 0; 1156 int remain_budget = budget; 1157 1158 mtk_handle_status_irq(eth); 1159 1160 poll_again: 1161 mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_STATUS); 1162 rx_done = mtk_poll_rx(napi, remain_budget, eth); 1163 1164 if (unlikely(netif_msg_intr(eth))) { 1165 status = mtk_r32(eth, MTK_PDMA_INT_STATUS); 1166 mask = mtk_r32(eth, MTK_PDMA_INT_MASK); 1167 dev_info(eth->dev, 1168 "done rx %d, intr 0x%08x/0x%x\n", 1169 rx_done, status, mask); 1170 } 1171 if (rx_done == remain_budget) 1172 return budget; 1173 1174 status = mtk_r32(eth, MTK_PDMA_INT_STATUS); 1175 if (status & MTK_RX_DONE_INT) { 1176 remain_budget -= rx_done; 1177 goto poll_again; 1178 } 1179 napi_complete(napi); 1180 mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); 1181 1182 return rx_done + budget - remain_budget; 1183 } 1184 1185 static int mtk_tx_alloc(struct mtk_eth *eth) 1186 { 1187 struct mtk_tx_ring *ring = ð->tx_ring; 1188 int i, sz = sizeof(*ring->dma); 1189 1190 ring->buf = kcalloc(MTK_DMA_SIZE, sizeof(*ring->buf), 1191 GFP_KERNEL); 1192 if (!ring->buf) 1193 goto no_tx_mem; 1194 1195 ring->dma = dma_alloc_coherent(eth->dev, MTK_DMA_SIZE * sz, 1196 &ring->phys, GFP_ATOMIC); 1197 if (!ring->dma) 1198 goto no_tx_mem; 1199 1200 for (i = 0; i < MTK_DMA_SIZE; i++) { 1201 int next = (i + 1) % MTK_DMA_SIZE; 1202 u32 next_ptr = ring->phys + next * sz; 1203 1204 ring->dma[i].txd2 = next_ptr; 1205 ring->dma[i].txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; 1206 } 1207 1208 atomic_set(&ring->free_count, MTK_DMA_SIZE - 2); 1209 ring->next_free = &ring->dma[0]; 1210 ring->last_free = &ring->dma[MTK_DMA_SIZE - 1]; 1211 ring->thresh = MAX_SKB_FRAGS; 1212 1213 /* make sure that all changes to the dma ring are flushed before we 1214 * continue 1215 */ 1216 wmb(); 1217 1218 mtk_w32(eth, ring->phys, MTK_QTX_CTX_PTR); 1219 mtk_w32(eth, ring->phys, MTK_QTX_DTX_PTR); 1220 mtk_w32(eth, 1221 ring->phys + ((MTK_DMA_SIZE - 1) * sz), 1222 MTK_QTX_CRX_PTR); 1223 mtk_w32(eth, 1224 ring->phys + ((MTK_DMA_SIZE - 1) * sz), 1225 MTK_QTX_DRX_PTR); 1226 mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES, MTK_QTX_CFG(0)); 1227 1228 return 0; 1229 1230 no_tx_mem: 1231 return -ENOMEM; 1232 } 1233 1234 static void mtk_tx_clean(struct mtk_eth *eth) 1235 { 1236 struct mtk_tx_ring *ring = ð->tx_ring; 1237 int i; 1238 1239 if (ring->buf) { 1240 for (i = 0; i < MTK_DMA_SIZE; i++) 1241 mtk_tx_unmap(eth, &ring->buf[i]); 1242 kfree(ring->buf); 1243 ring->buf = NULL; 1244 } 1245 1246 if (ring->dma) { 1247 dma_free_coherent(eth->dev, 1248 MTK_DMA_SIZE * sizeof(*ring->dma), 1249 ring->dma, 1250 ring->phys); 1251 ring->dma = NULL; 1252 } 1253 } 1254 1255 static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag) 1256 { 1257 struct mtk_rx_ring *ring; 1258 int rx_data_len, rx_dma_size; 1259 int i; 1260 u32 offset = 0; 1261 1262 if (rx_flag == MTK_RX_FLAGS_QDMA) { 1263 if (ring_no) 1264 return -EINVAL; 1265 ring = ð->rx_ring_qdma; 1266 offset = 0x1000; 1267 } else { 1268 ring = ð->rx_ring[ring_no]; 1269 } 1270 1271 if (rx_flag == MTK_RX_FLAGS_HWLRO) { 1272 rx_data_len = MTK_MAX_LRO_RX_LENGTH; 1273 rx_dma_size = MTK_HW_LRO_DMA_SIZE; 1274 } else { 1275 rx_data_len = ETH_DATA_LEN; 1276 rx_dma_size = MTK_DMA_SIZE; 1277 } 1278 1279 ring->frag_size = mtk_max_frag_size(rx_data_len); 1280 ring->buf_size = mtk_max_buf_size(ring->frag_size); 1281 ring->data = kcalloc(rx_dma_size, sizeof(*ring->data), 1282 GFP_KERNEL); 1283 if (!ring->data) 1284 return -ENOMEM; 1285 1286 for (i = 0; i < rx_dma_size; i++) { 1287 ring->data[i] = netdev_alloc_frag(ring->frag_size); 1288 if (!ring->data[i]) 1289 return -ENOMEM; 1290 } 1291 1292 ring->dma = dma_alloc_coherent(eth->dev, 1293 rx_dma_size * sizeof(*ring->dma), 1294 &ring->phys, GFP_ATOMIC); 1295 if (!ring->dma) 1296 return -ENOMEM; 1297 1298 for (i = 0; i < rx_dma_size; i++) { 1299 dma_addr_t dma_addr = dma_map_single(eth->dev, 1300 ring->data[i] + NET_SKB_PAD, 1301 ring->buf_size, 1302 DMA_FROM_DEVICE); 1303 if (unlikely(dma_mapping_error(eth->dev, dma_addr))) 1304 return -ENOMEM; 1305 ring->dma[i].rxd1 = (unsigned int)dma_addr; 1306 1307 ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size); 1308 } 1309 ring->dma_size = rx_dma_size; 1310 ring->calc_idx_update = false; 1311 ring->calc_idx = rx_dma_size - 1; 1312 ring->crx_idx_reg = MTK_PRX_CRX_IDX_CFG(ring_no); 1313 /* make sure that all changes to the dma ring are flushed before we 1314 * continue 1315 */ 1316 wmb(); 1317 1318 mtk_w32(eth, ring->phys, MTK_PRX_BASE_PTR_CFG(ring_no) + offset); 1319 mtk_w32(eth, rx_dma_size, MTK_PRX_MAX_CNT_CFG(ring_no) + offset); 1320 mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg + offset); 1321 mtk_w32(eth, MTK_PST_DRX_IDX_CFG(ring_no), MTK_PDMA_RST_IDX + offset); 1322 1323 return 0; 1324 } 1325 1326 static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring) 1327 { 1328 int i; 1329 1330 if (ring->data && ring->dma) { 1331 for (i = 0; i < ring->dma_size; i++) { 1332 if (!ring->data[i]) 1333 continue; 1334 if (!ring->dma[i].rxd1) 1335 continue; 1336 dma_unmap_single(eth->dev, 1337 ring->dma[i].rxd1, 1338 ring->buf_size, 1339 DMA_FROM_DEVICE); 1340 skb_free_frag(ring->data[i]); 1341 } 1342 kfree(ring->data); 1343 ring->data = NULL; 1344 } 1345 1346 if (ring->dma) { 1347 dma_free_coherent(eth->dev, 1348 ring->dma_size * sizeof(*ring->dma), 1349 ring->dma, 1350 ring->phys); 1351 ring->dma = NULL; 1352 } 1353 } 1354 1355 static int mtk_hwlro_rx_init(struct mtk_eth *eth) 1356 { 1357 int i; 1358 u32 ring_ctrl_dw1 = 0, ring_ctrl_dw2 = 0, ring_ctrl_dw3 = 0; 1359 u32 lro_ctrl_dw0 = 0, lro_ctrl_dw3 = 0; 1360 1361 /* set LRO rings to auto-learn modes */ 1362 ring_ctrl_dw2 |= MTK_RING_AUTO_LERAN_MODE; 1363 1364 /* validate LRO ring */ 1365 ring_ctrl_dw2 |= MTK_RING_VLD; 1366 1367 /* set AGE timer (unit: 20us) */ 1368 ring_ctrl_dw2 |= MTK_RING_AGE_TIME_H; 1369 ring_ctrl_dw1 |= MTK_RING_AGE_TIME_L; 1370 1371 /* set max AGG timer (unit: 20us) */ 1372 ring_ctrl_dw2 |= MTK_RING_MAX_AGG_TIME; 1373 1374 /* set max LRO AGG count */ 1375 ring_ctrl_dw2 |= MTK_RING_MAX_AGG_CNT_L; 1376 ring_ctrl_dw3 |= MTK_RING_MAX_AGG_CNT_H; 1377 1378 for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) { 1379 mtk_w32(eth, ring_ctrl_dw1, MTK_LRO_CTRL_DW1_CFG(i)); 1380 mtk_w32(eth, ring_ctrl_dw2, MTK_LRO_CTRL_DW2_CFG(i)); 1381 mtk_w32(eth, ring_ctrl_dw3, MTK_LRO_CTRL_DW3_CFG(i)); 1382 } 1383 1384 /* IPv4 checksum update enable */ 1385 lro_ctrl_dw0 |= MTK_L3_CKS_UPD_EN; 1386 1387 /* switch priority comparison to packet count mode */ 1388 lro_ctrl_dw0 |= MTK_LRO_ALT_PKT_CNT_MODE; 1389 1390 /* bandwidth threshold setting */ 1391 mtk_w32(eth, MTK_HW_LRO_BW_THRE, MTK_PDMA_LRO_CTRL_DW2); 1392 1393 /* auto-learn score delta setting */ 1394 mtk_w32(eth, MTK_HW_LRO_REPLACE_DELTA, MTK_PDMA_LRO_ALT_SCORE_DELTA); 1395 1396 /* set refresh timer for altering flows to 1 sec. (unit: 20us) */ 1397 mtk_w32(eth, (MTK_HW_LRO_TIMER_UNIT << 16) | MTK_HW_LRO_REFRESH_TIME, 1398 MTK_PDMA_LRO_ALT_REFRESH_TIMER); 1399 1400 /* set HW LRO mode & the max aggregation count for rx packets */ 1401 lro_ctrl_dw3 |= MTK_ADMA_MODE | (MTK_HW_LRO_MAX_AGG_CNT & 0xff); 1402 1403 /* the minimal remaining room of SDL0 in RXD for lro aggregation */ 1404 lro_ctrl_dw3 |= MTK_LRO_MIN_RXD_SDL; 1405 1406 /* enable HW LRO */ 1407 lro_ctrl_dw0 |= MTK_LRO_EN; 1408 1409 mtk_w32(eth, lro_ctrl_dw3, MTK_PDMA_LRO_CTRL_DW3); 1410 mtk_w32(eth, lro_ctrl_dw0, MTK_PDMA_LRO_CTRL_DW0); 1411 1412 return 0; 1413 } 1414 1415 static void mtk_hwlro_rx_uninit(struct mtk_eth *eth) 1416 { 1417 int i; 1418 u32 val; 1419 1420 /* relinquish lro rings, flush aggregated packets */ 1421 mtk_w32(eth, MTK_LRO_RING_RELINQUISH_REQ, MTK_PDMA_LRO_CTRL_DW0); 1422 1423 /* wait for relinquishments done */ 1424 for (i = 0; i < 10; i++) { 1425 val = mtk_r32(eth, MTK_PDMA_LRO_CTRL_DW0); 1426 if (val & MTK_LRO_RING_RELINQUISH_DONE) { 1427 msleep(20); 1428 continue; 1429 } 1430 break; 1431 } 1432 1433 /* invalidate lro rings */ 1434 for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) 1435 mtk_w32(eth, 0, MTK_LRO_CTRL_DW2_CFG(i)); 1436 1437 /* disable HW LRO */ 1438 mtk_w32(eth, 0, MTK_PDMA_LRO_CTRL_DW0); 1439 } 1440 1441 static void mtk_hwlro_val_ipaddr(struct mtk_eth *eth, int idx, __be32 ip) 1442 { 1443 u32 reg_val; 1444 1445 reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx)); 1446 1447 /* invalidate the IP setting */ 1448 mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); 1449 1450 mtk_w32(eth, ip, MTK_LRO_DIP_DW0_CFG(idx)); 1451 1452 /* validate the IP setting */ 1453 mtk_w32(eth, (reg_val | MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); 1454 } 1455 1456 static void mtk_hwlro_inval_ipaddr(struct mtk_eth *eth, int idx) 1457 { 1458 u32 reg_val; 1459 1460 reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx)); 1461 1462 /* invalidate the IP setting */ 1463 mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); 1464 1465 mtk_w32(eth, 0, MTK_LRO_DIP_DW0_CFG(idx)); 1466 } 1467 1468 static int mtk_hwlro_get_ip_cnt(struct mtk_mac *mac) 1469 { 1470 int cnt = 0; 1471 int i; 1472 1473 for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { 1474 if (mac->hwlro_ip[i]) 1475 cnt++; 1476 } 1477 1478 return cnt; 1479 } 1480 1481 static int mtk_hwlro_add_ipaddr(struct net_device *dev, 1482 struct ethtool_rxnfc *cmd) 1483 { 1484 struct ethtool_rx_flow_spec *fsp = 1485 (struct ethtool_rx_flow_spec *)&cmd->fs; 1486 struct mtk_mac *mac = netdev_priv(dev); 1487 struct mtk_eth *eth = mac->hw; 1488 int hwlro_idx; 1489 1490 if ((fsp->flow_type != TCP_V4_FLOW) || 1491 (!fsp->h_u.tcp_ip4_spec.ip4dst) || 1492 (fsp->location > 1)) 1493 return -EINVAL; 1494 1495 mac->hwlro_ip[fsp->location] = htonl(fsp->h_u.tcp_ip4_spec.ip4dst); 1496 hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location; 1497 1498 mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac); 1499 1500 mtk_hwlro_val_ipaddr(eth, hwlro_idx, mac->hwlro_ip[fsp->location]); 1501 1502 return 0; 1503 } 1504 1505 static int mtk_hwlro_del_ipaddr(struct net_device *dev, 1506 struct ethtool_rxnfc *cmd) 1507 { 1508 struct ethtool_rx_flow_spec *fsp = 1509 (struct ethtool_rx_flow_spec *)&cmd->fs; 1510 struct mtk_mac *mac = netdev_priv(dev); 1511 struct mtk_eth *eth = mac->hw; 1512 int hwlro_idx; 1513 1514 if (fsp->location > 1) 1515 return -EINVAL; 1516 1517 mac->hwlro_ip[fsp->location] = 0; 1518 hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location; 1519 1520 mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac); 1521 1522 mtk_hwlro_inval_ipaddr(eth, hwlro_idx); 1523 1524 return 0; 1525 } 1526 1527 static void mtk_hwlro_netdev_disable(struct net_device *dev) 1528 { 1529 struct mtk_mac *mac = netdev_priv(dev); 1530 struct mtk_eth *eth = mac->hw; 1531 int i, hwlro_idx; 1532 1533 for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { 1534 mac->hwlro_ip[i] = 0; 1535 hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + i; 1536 1537 mtk_hwlro_inval_ipaddr(eth, hwlro_idx); 1538 } 1539 1540 mac->hwlro_ip_cnt = 0; 1541 } 1542 1543 static int mtk_hwlro_get_fdir_entry(struct net_device *dev, 1544 struct ethtool_rxnfc *cmd) 1545 { 1546 struct mtk_mac *mac = netdev_priv(dev); 1547 struct ethtool_rx_flow_spec *fsp = 1548 (struct ethtool_rx_flow_spec *)&cmd->fs; 1549 1550 /* only tcp dst ipv4 is meaningful, others are meaningless */ 1551 fsp->flow_type = TCP_V4_FLOW; 1552 fsp->h_u.tcp_ip4_spec.ip4dst = ntohl(mac->hwlro_ip[fsp->location]); 1553 fsp->m_u.tcp_ip4_spec.ip4dst = 0; 1554 1555 fsp->h_u.tcp_ip4_spec.ip4src = 0; 1556 fsp->m_u.tcp_ip4_spec.ip4src = 0xffffffff; 1557 fsp->h_u.tcp_ip4_spec.psrc = 0; 1558 fsp->m_u.tcp_ip4_spec.psrc = 0xffff; 1559 fsp->h_u.tcp_ip4_spec.pdst = 0; 1560 fsp->m_u.tcp_ip4_spec.pdst = 0xffff; 1561 fsp->h_u.tcp_ip4_spec.tos = 0; 1562 fsp->m_u.tcp_ip4_spec.tos = 0xff; 1563 1564 return 0; 1565 } 1566 1567 static int mtk_hwlro_get_fdir_all(struct net_device *dev, 1568 struct ethtool_rxnfc *cmd, 1569 u32 *rule_locs) 1570 { 1571 struct mtk_mac *mac = netdev_priv(dev); 1572 int cnt = 0; 1573 int i; 1574 1575 for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { 1576 if (mac->hwlro_ip[i]) { 1577 rule_locs[cnt] = i; 1578 cnt++; 1579 } 1580 } 1581 1582 cmd->rule_cnt = cnt; 1583 1584 return 0; 1585 } 1586 1587 static netdev_features_t mtk_fix_features(struct net_device *dev, 1588 netdev_features_t features) 1589 { 1590 if (!(features & NETIF_F_LRO)) { 1591 struct mtk_mac *mac = netdev_priv(dev); 1592 int ip_cnt = mtk_hwlro_get_ip_cnt(mac); 1593 1594 if (ip_cnt) { 1595 netdev_info(dev, "RX flow is programmed, LRO should keep on\n"); 1596 1597 features |= NETIF_F_LRO; 1598 } 1599 } 1600 1601 return features; 1602 } 1603 1604 static int mtk_set_features(struct net_device *dev, netdev_features_t features) 1605 { 1606 int err = 0; 1607 1608 if (!((dev->features ^ features) & NETIF_F_LRO)) 1609 return 0; 1610 1611 if (!(features & NETIF_F_LRO)) 1612 mtk_hwlro_netdev_disable(dev); 1613 1614 return err; 1615 } 1616 1617 /* wait for DMA to finish whatever it is doing before we start using it again */ 1618 static int mtk_dma_busy_wait(struct mtk_eth *eth) 1619 { 1620 unsigned long t_start = jiffies; 1621 1622 while (1) { 1623 if (!(mtk_r32(eth, MTK_QDMA_GLO_CFG) & 1624 (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) 1625 return 0; 1626 if (time_after(jiffies, t_start + MTK_DMA_BUSY_TIMEOUT)) 1627 break; 1628 } 1629 1630 dev_err(eth->dev, "DMA init timeout\n"); 1631 return -1; 1632 } 1633 1634 static int mtk_dma_init(struct mtk_eth *eth) 1635 { 1636 int err; 1637 u32 i; 1638 1639 if (mtk_dma_busy_wait(eth)) 1640 return -EBUSY; 1641 1642 /* QDMA needs scratch memory for internal reordering of the 1643 * descriptors 1644 */ 1645 err = mtk_init_fq_dma(eth); 1646 if (err) 1647 return err; 1648 1649 err = mtk_tx_alloc(eth); 1650 if (err) 1651 return err; 1652 1653 err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_QDMA); 1654 if (err) 1655 return err; 1656 1657 err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_NORMAL); 1658 if (err) 1659 return err; 1660 1661 if (eth->hwlro) { 1662 for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) { 1663 err = mtk_rx_alloc(eth, i, MTK_RX_FLAGS_HWLRO); 1664 if (err) 1665 return err; 1666 } 1667 err = mtk_hwlro_rx_init(eth); 1668 if (err) 1669 return err; 1670 } 1671 1672 /* Enable random early drop and set drop threshold automatically */ 1673 mtk_w32(eth, FC_THRES_DROP_MODE | FC_THRES_DROP_EN | FC_THRES_MIN, 1674 MTK_QDMA_FC_THRES); 1675 mtk_w32(eth, 0x0, MTK_QDMA_HRED2); 1676 1677 return 0; 1678 } 1679 1680 static void mtk_dma_free(struct mtk_eth *eth) 1681 { 1682 int i; 1683 1684 for (i = 0; i < MTK_MAC_COUNT; i++) 1685 if (eth->netdev[i]) 1686 netdev_reset_queue(eth->netdev[i]); 1687 if (eth->scratch_ring) { 1688 dma_free_coherent(eth->dev, 1689 MTK_DMA_SIZE * sizeof(struct mtk_tx_dma), 1690 eth->scratch_ring, 1691 eth->phy_scratch_ring); 1692 eth->scratch_ring = NULL; 1693 eth->phy_scratch_ring = 0; 1694 } 1695 mtk_tx_clean(eth); 1696 mtk_rx_clean(eth, ð->rx_ring[0]); 1697 mtk_rx_clean(eth, ð->rx_ring_qdma); 1698 1699 if (eth->hwlro) { 1700 mtk_hwlro_rx_uninit(eth); 1701 for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) 1702 mtk_rx_clean(eth, ð->rx_ring[i]); 1703 } 1704 1705 kfree(eth->scratch_head); 1706 } 1707 1708 static void mtk_tx_timeout(struct net_device *dev) 1709 { 1710 struct mtk_mac *mac = netdev_priv(dev); 1711 struct mtk_eth *eth = mac->hw; 1712 1713 eth->netdev[mac->id]->stats.tx_errors++; 1714 netif_err(eth, tx_err, dev, 1715 "transmit timed out\n"); 1716 schedule_work(ð->pending_work); 1717 } 1718 1719 static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth) 1720 { 1721 struct mtk_eth *eth = _eth; 1722 1723 if (likely(napi_schedule_prep(ð->rx_napi))) { 1724 __napi_schedule(ð->rx_napi); 1725 mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); 1726 } 1727 1728 return IRQ_HANDLED; 1729 } 1730 1731 static irqreturn_t mtk_handle_irq_tx(int irq, void *_eth) 1732 { 1733 struct mtk_eth *eth = _eth; 1734 1735 if (likely(napi_schedule_prep(ð->tx_napi))) { 1736 __napi_schedule(ð->tx_napi); 1737 mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); 1738 } 1739 1740 return IRQ_HANDLED; 1741 } 1742 1743 static irqreturn_t mtk_handle_irq(int irq, void *_eth) 1744 { 1745 struct mtk_eth *eth = _eth; 1746 1747 if (mtk_r32(eth, MTK_PDMA_INT_MASK) & MTK_RX_DONE_INT) { 1748 if (mtk_r32(eth, MTK_PDMA_INT_STATUS) & MTK_RX_DONE_INT) 1749 mtk_handle_irq_rx(irq, _eth); 1750 } 1751 if (mtk_r32(eth, MTK_QDMA_INT_MASK) & MTK_TX_DONE_INT) { 1752 if (mtk_r32(eth, MTK_QMTK_INT_STATUS) & MTK_TX_DONE_INT) 1753 mtk_handle_irq_tx(irq, _eth); 1754 } 1755 1756 return IRQ_HANDLED; 1757 } 1758 1759 #ifdef CONFIG_NET_POLL_CONTROLLER 1760 static void mtk_poll_controller(struct net_device *dev) 1761 { 1762 struct mtk_mac *mac = netdev_priv(dev); 1763 struct mtk_eth *eth = mac->hw; 1764 1765 mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); 1766 mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); 1767 mtk_handle_irq_rx(eth->irq[2], dev); 1768 mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); 1769 mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); 1770 } 1771 #endif 1772 1773 static int mtk_start_dma(struct mtk_eth *eth) 1774 { 1775 int err; 1776 1777 err = mtk_dma_init(eth); 1778 if (err) { 1779 mtk_dma_free(eth); 1780 return err; 1781 } 1782 1783 mtk_w32(eth, 1784 MTK_TX_WB_DDONE | MTK_TX_DMA_EN | 1785 MTK_DMA_SIZE_16DWORDS | MTK_NDP_CO_PRO | 1786 MTK_RX_DMA_EN | MTK_RX_2B_OFFSET | 1787 MTK_RX_BT_32DWORDS, 1788 MTK_QDMA_GLO_CFG); 1789 1790 mtk_w32(eth, 1791 MTK_RX_DMA_EN | MTK_RX_2B_OFFSET | 1792 MTK_RX_BT_32DWORDS | MTK_MULTI_EN, 1793 MTK_PDMA_GLO_CFG); 1794 1795 return 0; 1796 } 1797 1798 static int mtk_open(struct net_device *dev) 1799 { 1800 struct mtk_mac *mac = netdev_priv(dev); 1801 struct mtk_eth *eth = mac->hw; 1802 1803 /* we run 2 netdevs on the same dma ring so we only bring it up once */ 1804 if (!refcount_read(ð->dma_refcnt)) { 1805 int err = mtk_start_dma(eth); 1806 1807 if (err) 1808 return err; 1809 1810 napi_enable(ð->tx_napi); 1811 napi_enable(ð->rx_napi); 1812 mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); 1813 mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); 1814 refcount_set(ð->dma_refcnt, 1); 1815 } 1816 else 1817 refcount_inc(ð->dma_refcnt); 1818 1819 phy_start(dev->phydev); 1820 netif_start_queue(dev); 1821 1822 return 0; 1823 } 1824 1825 static void mtk_stop_dma(struct mtk_eth *eth, u32 glo_cfg) 1826 { 1827 u32 val; 1828 int i; 1829 1830 /* stop the dma engine */ 1831 spin_lock_bh(ð->page_lock); 1832 val = mtk_r32(eth, glo_cfg); 1833 mtk_w32(eth, val & ~(MTK_TX_WB_DDONE | MTK_RX_DMA_EN | MTK_TX_DMA_EN), 1834 glo_cfg); 1835 spin_unlock_bh(ð->page_lock); 1836 1837 /* wait for dma stop */ 1838 for (i = 0; i < 10; i++) { 1839 val = mtk_r32(eth, glo_cfg); 1840 if (val & (MTK_TX_DMA_BUSY | MTK_RX_DMA_BUSY)) { 1841 msleep(20); 1842 continue; 1843 } 1844 break; 1845 } 1846 } 1847 1848 static int mtk_stop(struct net_device *dev) 1849 { 1850 struct mtk_mac *mac = netdev_priv(dev); 1851 struct mtk_eth *eth = mac->hw; 1852 1853 netif_tx_disable(dev); 1854 phy_stop(dev->phydev); 1855 1856 /* only shutdown DMA if this is the last user */ 1857 if (!refcount_dec_and_test(ð->dma_refcnt)) 1858 return 0; 1859 1860 mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); 1861 mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); 1862 napi_disable(ð->tx_napi); 1863 napi_disable(ð->rx_napi); 1864 1865 mtk_stop_dma(eth, MTK_QDMA_GLO_CFG); 1866 mtk_stop_dma(eth, MTK_PDMA_GLO_CFG); 1867 1868 mtk_dma_free(eth); 1869 1870 return 0; 1871 } 1872 1873 static void ethsys_reset(struct mtk_eth *eth, u32 reset_bits) 1874 { 1875 regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL, 1876 reset_bits, 1877 reset_bits); 1878 1879 usleep_range(1000, 1100); 1880 regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL, 1881 reset_bits, 1882 ~reset_bits); 1883 mdelay(10); 1884 } 1885 1886 static void mtk_clk_disable(struct mtk_eth *eth) 1887 { 1888 int clk; 1889 1890 for (clk = MTK_CLK_MAX - 1; clk >= 0; clk--) 1891 clk_disable_unprepare(eth->clks[clk]); 1892 } 1893 1894 static int mtk_clk_enable(struct mtk_eth *eth) 1895 { 1896 int clk, ret; 1897 1898 for (clk = 0; clk < MTK_CLK_MAX ; clk++) { 1899 ret = clk_prepare_enable(eth->clks[clk]); 1900 if (ret) 1901 goto err_disable_clks; 1902 } 1903 1904 return 0; 1905 1906 err_disable_clks: 1907 while (--clk >= 0) 1908 clk_disable_unprepare(eth->clks[clk]); 1909 1910 return ret; 1911 } 1912 1913 static int mtk_hw_init(struct mtk_eth *eth) 1914 { 1915 int i, val, ret; 1916 1917 if (test_and_set_bit(MTK_HW_INIT, ð->state)) 1918 return 0; 1919 1920 pm_runtime_enable(eth->dev); 1921 pm_runtime_get_sync(eth->dev); 1922 1923 ret = mtk_clk_enable(eth); 1924 if (ret) 1925 goto err_disable_pm; 1926 1927 ethsys_reset(eth, RSTCTRL_FE); 1928 ethsys_reset(eth, RSTCTRL_PPE); 1929 1930 regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); 1931 for (i = 0; i < MTK_MAC_COUNT; i++) { 1932 if (!eth->mac[i]) 1933 continue; 1934 val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, eth->mac[i]->id); 1935 val |= SYSCFG0_GE_MODE(eth->mac[i]->ge_mode, eth->mac[i]->id); 1936 } 1937 regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); 1938 1939 if (eth->pctl) { 1940 /* Set GE2 driving and slew rate */ 1941 regmap_write(eth->pctl, GPIO_DRV_SEL10, 0xa00); 1942 1943 /* set GE2 TDSEL */ 1944 regmap_write(eth->pctl, GPIO_OD33_CTRL8, 0x5); 1945 1946 /* set GE2 TUNE */ 1947 regmap_write(eth->pctl, GPIO_BIAS_CTRL, 0x0); 1948 } 1949 1950 /* Set linkdown as the default for each GMAC. Its own MCR would be set 1951 * up with the more appropriate value when mtk_phy_link_adjust call is 1952 * being invoked. 1953 */ 1954 for (i = 0; i < MTK_MAC_COUNT; i++) 1955 mtk_w32(eth, 0, MTK_MAC_MCR(i)); 1956 1957 /* Indicates CDM to parse the MTK special tag from CPU 1958 * which also is working out for untag packets. 1959 */ 1960 val = mtk_r32(eth, MTK_CDMQ_IG_CTRL); 1961 mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL); 1962 1963 /* Enable RX VLan Offloading */ 1964 mtk_w32(eth, 1, MTK_CDMP_EG_CTRL); 1965 1966 /* enable interrupt delay for RX */ 1967 mtk_w32(eth, MTK_PDMA_DELAY_RX_DELAY, MTK_PDMA_DELAY_INT); 1968 1969 /* disable delay and normal interrupt */ 1970 mtk_w32(eth, 0, MTK_QDMA_DELAY_INT); 1971 mtk_tx_irq_disable(eth, ~0); 1972 mtk_rx_irq_disable(eth, ~0); 1973 mtk_w32(eth, RST_GL_PSE, MTK_RST_GL); 1974 mtk_w32(eth, 0, MTK_RST_GL); 1975 1976 /* FE int grouping */ 1977 mtk_w32(eth, MTK_TX_DONE_INT, MTK_PDMA_INT_GRP1); 1978 mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_GRP2); 1979 mtk_w32(eth, MTK_TX_DONE_INT, MTK_QDMA_INT_GRP1); 1980 mtk_w32(eth, MTK_RX_DONE_INT, MTK_QDMA_INT_GRP2); 1981 mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP); 1982 1983 for (i = 0; i < 2; i++) { 1984 u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i)); 1985 1986 /* setup the forward port to send frame to PDMA */ 1987 val &= ~0xffff; 1988 1989 /* Enable RX checksum */ 1990 val |= MTK_GDMA_ICS_EN | MTK_GDMA_TCS_EN | MTK_GDMA_UCS_EN; 1991 1992 /* setup the mac dma */ 1993 mtk_w32(eth, val, MTK_GDMA_FWD_CFG(i)); 1994 } 1995 1996 return 0; 1997 1998 err_disable_pm: 1999 pm_runtime_put_sync(eth->dev); 2000 pm_runtime_disable(eth->dev); 2001 2002 return ret; 2003 } 2004 2005 static int mtk_hw_deinit(struct mtk_eth *eth) 2006 { 2007 if (!test_and_clear_bit(MTK_HW_INIT, ð->state)) 2008 return 0; 2009 2010 mtk_clk_disable(eth); 2011 2012 pm_runtime_put_sync(eth->dev); 2013 pm_runtime_disable(eth->dev); 2014 2015 return 0; 2016 } 2017 2018 static int __init mtk_init(struct net_device *dev) 2019 { 2020 struct mtk_mac *mac = netdev_priv(dev); 2021 struct mtk_eth *eth = mac->hw; 2022 const char *mac_addr; 2023 2024 mac_addr = of_get_mac_address(mac->of_node); 2025 if (!IS_ERR(mac_addr)) 2026 ether_addr_copy(dev->dev_addr, mac_addr); 2027 2028 /* If the mac address is invalid, use random mac address */ 2029 if (!is_valid_ether_addr(dev->dev_addr)) { 2030 eth_hw_addr_random(dev); 2031 dev_err(eth->dev, "generated random MAC address %pM\n", 2032 dev->dev_addr); 2033 } 2034 2035 return mtk_phy_connect(dev); 2036 } 2037 2038 static void mtk_uninit(struct net_device *dev) 2039 { 2040 struct mtk_mac *mac = netdev_priv(dev); 2041 struct mtk_eth *eth = mac->hw; 2042 2043 phy_disconnect(dev->phydev); 2044 if (of_phy_is_fixed_link(mac->of_node)) 2045 of_phy_deregister_fixed_link(mac->of_node); 2046 mtk_tx_irq_disable(eth, ~0); 2047 mtk_rx_irq_disable(eth, ~0); 2048 } 2049 2050 static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2051 { 2052 switch (cmd) { 2053 case SIOCGMIIPHY: 2054 case SIOCGMIIREG: 2055 case SIOCSMIIREG: 2056 return phy_mii_ioctl(dev->phydev, ifr, cmd); 2057 default: 2058 break; 2059 } 2060 2061 return -EOPNOTSUPP; 2062 } 2063 2064 static void mtk_pending_work(struct work_struct *work) 2065 { 2066 struct mtk_eth *eth = container_of(work, struct mtk_eth, pending_work); 2067 int err, i; 2068 unsigned long restart = 0; 2069 2070 rtnl_lock(); 2071 2072 dev_dbg(eth->dev, "[%s][%d] reset\n", __func__, __LINE__); 2073 2074 while (test_and_set_bit_lock(MTK_RESETTING, ð->state)) 2075 cpu_relax(); 2076 2077 dev_dbg(eth->dev, "[%s][%d] mtk_stop starts\n", __func__, __LINE__); 2078 /* stop all devices to make sure that dma is properly shut down */ 2079 for (i = 0; i < MTK_MAC_COUNT; i++) { 2080 if (!eth->netdev[i]) 2081 continue; 2082 mtk_stop(eth->netdev[i]); 2083 __set_bit(i, &restart); 2084 } 2085 dev_dbg(eth->dev, "[%s][%d] mtk_stop ends\n", __func__, __LINE__); 2086 2087 /* restart underlying hardware such as power, clock, pin mux 2088 * and the connected phy 2089 */ 2090 mtk_hw_deinit(eth); 2091 2092 if (eth->dev->pins) 2093 pinctrl_select_state(eth->dev->pins->p, 2094 eth->dev->pins->default_state); 2095 mtk_hw_init(eth); 2096 2097 for (i = 0; i < MTK_MAC_COUNT; i++) { 2098 if (!eth->mac[i] || 2099 of_phy_is_fixed_link(eth->mac[i]->of_node)) 2100 continue; 2101 err = phy_init_hw(eth->netdev[i]->phydev); 2102 if (err) 2103 dev_err(eth->dev, "%s: PHY init failed.\n", 2104 eth->netdev[i]->name); 2105 } 2106 2107 /* restart DMA and enable IRQs */ 2108 for (i = 0; i < MTK_MAC_COUNT; i++) { 2109 if (!test_bit(i, &restart)) 2110 continue; 2111 err = mtk_open(eth->netdev[i]); 2112 if (err) { 2113 netif_alert(eth, ifup, eth->netdev[i], 2114 "Driver up/down cycle failed, closing device.\n"); 2115 dev_close(eth->netdev[i]); 2116 } 2117 } 2118 2119 dev_dbg(eth->dev, "[%s][%d] reset done\n", __func__, __LINE__); 2120 2121 clear_bit_unlock(MTK_RESETTING, ð->state); 2122 2123 rtnl_unlock(); 2124 } 2125 2126 static int mtk_free_dev(struct mtk_eth *eth) 2127 { 2128 int i; 2129 2130 for (i = 0; i < MTK_MAC_COUNT; i++) { 2131 if (!eth->netdev[i]) 2132 continue; 2133 free_netdev(eth->netdev[i]); 2134 } 2135 2136 return 0; 2137 } 2138 2139 static int mtk_unreg_dev(struct mtk_eth *eth) 2140 { 2141 int i; 2142 2143 for (i = 0; i < MTK_MAC_COUNT; i++) { 2144 if (!eth->netdev[i]) 2145 continue; 2146 unregister_netdev(eth->netdev[i]); 2147 } 2148 2149 return 0; 2150 } 2151 2152 static int mtk_cleanup(struct mtk_eth *eth) 2153 { 2154 mtk_unreg_dev(eth); 2155 mtk_free_dev(eth); 2156 cancel_work_sync(ð->pending_work); 2157 2158 return 0; 2159 } 2160 2161 static int mtk_get_link_ksettings(struct net_device *ndev, 2162 struct ethtool_link_ksettings *cmd) 2163 { 2164 struct mtk_mac *mac = netdev_priv(ndev); 2165 2166 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2167 return -EBUSY; 2168 2169 phy_ethtool_ksettings_get(ndev->phydev, cmd); 2170 2171 return 0; 2172 } 2173 2174 static int mtk_set_link_ksettings(struct net_device *ndev, 2175 const struct ethtool_link_ksettings *cmd) 2176 { 2177 struct mtk_mac *mac = netdev_priv(ndev); 2178 2179 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2180 return -EBUSY; 2181 2182 return phy_ethtool_ksettings_set(ndev->phydev, cmd); 2183 } 2184 2185 static void mtk_get_drvinfo(struct net_device *dev, 2186 struct ethtool_drvinfo *info) 2187 { 2188 struct mtk_mac *mac = netdev_priv(dev); 2189 2190 strlcpy(info->driver, mac->hw->dev->driver->name, sizeof(info->driver)); 2191 strlcpy(info->bus_info, dev_name(mac->hw->dev), sizeof(info->bus_info)); 2192 info->n_stats = ARRAY_SIZE(mtk_ethtool_stats); 2193 } 2194 2195 static u32 mtk_get_msglevel(struct net_device *dev) 2196 { 2197 struct mtk_mac *mac = netdev_priv(dev); 2198 2199 return mac->hw->msg_enable; 2200 } 2201 2202 static void mtk_set_msglevel(struct net_device *dev, u32 value) 2203 { 2204 struct mtk_mac *mac = netdev_priv(dev); 2205 2206 mac->hw->msg_enable = value; 2207 } 2208 2209 static int mtk_nway_reset(struct net_device *dev) 2210 { 2211 struct mtk_mac *mac = netdev_priv(dev); 2212 2213 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2214 return -EBUSY; 2215 2216 return genphy_restart_aneg(dev->phydev); 2217 } 2218 2219 static u32 mtk_get_link(struct net_device *dev) 2220 { 2221 struct mtk_mac *mac = netdev_priv(dev); 2222 int err; 2223 2224 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2225 return -EBUSY; 2226 2227 err = genphy_update_link(dev->phydev); 2228 if (err) 2229 return ethtool_op_get_link(dev); 2230 2231 return dev->phydev->link; 2232 } 2233 2234 static void mtk_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2235 { 2236 int i; 2237 2238 switch (stringset) { 2239 case ETH_SS_STATS: 2240 for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) { 2241 memcpy(data, mtk_ethtool_stats[i].str, ETH_GSTRING_LEN); 2242 data += ETH_GSTRING_LEN; 2243 } 2244 break; 2245 } 2246 } 2247 2248 static int mtk_get_sset_count(struct net_device *dev, int sset) 2249 { 2250 switch (sset) { 2251 case ETH_SS_STATS: 2252 return ARRAY_SIZE(mtk_ethtool_stats); 2253 default: 2254 return -EOPNOTSUPP; 2255 } 2256 } 2257 2258 static void mtk_get_ethtool_stats(struct net_device *dev, 2259 struct ethtool_stats *stats, u64 *data) 2260 { 2261 struct mtk_mac *mac = netdev_priv(dev); 2262 struct mtk_hw_stats *hwstats = mac->hw_stats; 2263 u64 *data_src, *data_dst; 2264 unsigned int start; 2265 int i; 2266 2267 if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) 2268 return; 2269 2270 if (netif_running(dev) && netif_device_present(dev)) { 2271 if (spin_trylock_bh(&hwstats->stats_lock)) { 2272 mtk_stats_update_mac(mac); 2273 spin_unlock_bh(&hwstats->stats_lock); 2274 } 2275 } 2276 2277 data_src = (u64 *)hwstats; 2278 2279 do { 2280 data_dst = data; 2281 start = u64_stats_fetch_begin_irq(&hwstats->syncp); 2282 2283 for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) 2284 *data_dst++ = *(data_src + mtk_ethtool_stats[i].offset); 2285 } while (u64_stats_fetch_retry_irq(&hwstats->syncp, start)); 2286 } 2287 2288 static int mtk_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd, 2289 u32 *rule_locs) 2290 { 2291 int ret = -EOPNOTSUPP; 2292 2293 switch (cmd->cmd) { 2294 case ETHTOOL_GRXRINGS: 2295 if (dev->features & NETIF_F_LRO) { 2296 cmd->data = MTK_MAX_RX_RING_NUM; 2297 ret = 0; 2298 } 2299 break; 2300 case ETHTOOL_GRXCLSRLCNT: 2301 if (dev->features & NETIF_F_LRO) { 2302 struct mtk_mac *mac = netdev_priv(dev); 2303 2304 cmd->rule_cnt = mac->hwlro_ip_cnt; 2305 ret = 0; 2306 } 2307 break; 2308 case ETHTOOL_GRXCLSRULE: 2309 if (dev->features & NETIF_F_LRO) 2310 ret = mtk_hwlro_get_fdir_entry(dev, cmd); 2311 break; 2312 case ETHTOOL_GRXCLSRLALL: 2313 if (dev->features & NETIF_F_LRO) 2314 ret = mtk_hwlro_get_fdir_all(dev, cmd, 2315 rule_locs); 2316 break; 2317 default: 2318 break; 2319 } 2320 2321 return ret; 2322 } 2323 2324 static int mtk_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd) 2325 { 2326 int ret = -EOPNOTSUPP; 2327 2328 switch (cmd->cmd) { 2329 case ETHTOOL_SRXCLSRLINS: 2330 if (dev->features & NETIF_F_LRO) 2331 ret = mtk_hwlro_add_ipaddr(dev, cmd); 2332 break; 2333 case ETHTOOL_SRXCLSRLDEL: 2334 if (dev->features & NETIF_F_LRO) 2335 ret = mtk_hwlro_del_ipaddr(dev, cmd); 2336 break; 2337 default: 2338 break; 2339 } 2340 2341 return ret; 2342 } 2343 2344 static const struct ethtool_ops mtk_ethtool_ops = { 2345 .get_link_ksettings = mtk_get_link_ksettings, 2346 .set_link_ksettings = mtk_set_link_ksettings, 2347 .get_drvinfo = mtk_get_drvinfo, 2348 .get_msglevel = mtk_get_msglevel, 2349 .set_msglevel = mtk_set_msglevel, 2350 .nway_reset = mtk_nway_reset, 2351 .get_link = mtk_get_link, 2352 .get_strings = mtk_get_strings, 2353 .get_sset_count = mtk_get_sset_count, 2354 .get_ethtool_stats = mtk_get_ethtool_stats, 2355 .get_rxnfc = mtk_get_rxnfc, 2356 .set_rxnfc = mtk_set_rxnfc, 2357 }; 2358 2359 static const struct net_device_ops mtk_netdev_ops = { 2360 .ndo_init = mtk_init, 2361 .ndo_uninit = mtk_uninit, 2362 .ndo_open = mtk_open, 2363 .ndo_stop = mtk_stop, 2364 .ndo_start_xmit = mtk_start_xmit, 2365 .ndo_set_mac_address = mtk_set_mac_address, 2366 .ndo_validate_addr = eth_validate_addr, 2367 .ndo_do_ioctl = mtk_do_ioctl, 2368 .ndo_tx_timeout = mtk_tx_timeout, 2369 .ndo_get_stats64 = mtk_get_stats64, 2370 .ndo_fix_features = mtk_fix_features, 2371 .ndo_set_features = mtk_set_features, 2372 #ifdef CONFIG_NET_POLL_CONTROLLER 2373 .ndo_poll_controller = mtk_poll_controller, 2374 #endif 2375 }; 2376 2377 static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np) 2378 { 2379 struct mtk_mac *mac; 2380 const __be32 *_id = of_get_property(np, "reg", NULL); 2381 int id, err; 2382 2383 if (!_id) { 2384 dev_err(eth->dev, "missing mac id\n"); 2385 return -EINVAL; 2386 } 2387 2388 id = be32_to_cpup(_id); 2389 if (id >= MTK_MAC_COUNT) { 2390 dev_err(eth->dev, "%d is not a valid mac id\n", id); 2391 return -EINVAL; 2392 } 2393 2394 if (eth->netdev[id]) { 2395 dev_err(eth->dev, "duplicate mac id found: %d\n", id); 2396 return -EINVAL; 2397 } 2398 2399 eth->netdev[id] = alloc_etherdev(sizeof(*mac)); 2400 if (!eth->netdev[id]) { 2401 dev_err(eth->dev, "alloc_etherdev failed\n"); 2402 return -ENOMEM; 2403 } 2404 mac = netdev_priv(eth->netdev[id]); 2405 eth->mac[id] = mac; 2406 mac->id = id; 2407 mac->hw = eth; 2408 mac->of_node = np; 2409 2410 memset(mac->hwlro_ip, 0, sizeof(mac->hwlro_ip)); 2411 mac->hwlro_ip_cnt = 0; 2412 2413 mac->hw_stats = devm_kzalloc(eth->dev, 2414 sizeof(*mac->hw_stats), 2415 GFP_KERNEL); 2416 if (!mac->hw_stats) { 2417 dev_err(eth->dev, "failed to allocate counter memory\n"); 2418 err = -ENOMEM; 2419 goto free_netdev; 2420 } 2421 spin_lock_init(&mac->hw_stats->stats_lock); 2422 u64_stats_init(&mac->hw_stats->syncp); 2423 mac->hw_stats->reg_offset = id * MTK_STAT_OFFSET; 2424 2425 SET_NETDEV_DEV(eth->netdev[id], eth->dev); 2426 eth->netdev[id]->watchdog_timeo = 5 * HZ; 2427 eth->netdev[id]->netdev_ops = &mtk_netdev_ops; 2428 eth->netdev[id]->base_addr = (unsigned long)eth->base; 2429 2430 eth->netdev[id]->hw_features = MTK_HW_FEATURES; 2431 if (eth->hwlro) 2432 eth->netdev[id]->hw_features |= NETIF_F_LRO; 2433 2434 eth->netdev[id]->vlan_features = MTK_HW_FEATURES & 2435 ~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX); 2436 eth->netdev[id]->features |= MTK_HW_FEATURES; 2437 eth->netdev[id]->ethtool_ops = &mtk_ethtool_ops; 2438 2439 eth->netdev[id]->irq = eth->irq[0]; 2440 eth->netdev[id]->dev.of_node = np; 2441 2442 return 0; 2443 2444 free_netdev: 2445 free_netdev(eth->netdev[id]); 2446 return err; 2447 } 2448 2449 static int mtk_probe(struct platform_device *pdev) 2450 { 2451 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2452 struct device_node *mac_np; 2453 struct mtk_eth *eth; 2454 int err; 2455 int i; 2456 2457 eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL); 2458 if (!eth) 2459 return -ENOMEM; 2460 2461 eth->soc = of_device_get_match_data(&pdev->dev); 2462 2463 eth->dev = &pdev->dev; 2464 eth->base = devm_ioremap_resource(&pdev->dev, res); 2465 if (IS_ERR(eth->base)) 2466 return PTR_ERR(eth->base); 2467 2468 spin_lock_init(ð->page_lock); 2469 spin_lock_init(ð->tx_irq_lock); 2470 spin_lock_init(ð->rx_irq_lock); 2471 2472 eth->ethsys = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 2473 "mediatek,ethsys"); 2474 if (IS_ERR(eth->ethsys)) { 2475 dev_err(&pdev->dev, "no ethsys regmap found\n"); 2476 return PTR_ERR(eth->ethsys); 2477 } 2478 2479 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) { 2480 eth->sgmiisys = 2481 syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 2482 "mediatek,sgmiisys"); 2483 if (IS_ERR(eth->sgmiisys)) { 2484 dev_err(&pdev->dev, "no sgmiisys regmap found\n"); 2485 return PTR_ERR(eth->sgmiisys); 2486 } 2487 } 2488 2489 if (eth->soc->required_pctl) { 2490 eth->pctl = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 2491 "mediatek,pctl"); 2492 if (IS_ERR(eth->pctl)) { 2493 dev_err(&pdev->dev, "no pctl regmap found\n"); 2494 return PTR_ERR(eth->pctl); 2495 } 2496 } 2497 2498 for (i = 0; i < 3; i++) { 2499 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT) && i > 0) 2500 eth->irq[i] = eth->irq[0]; 2501 else 2502 eth->irq[i] = platform_get_irq(pdev, i); 2503 if (eth->irq[i] < 0) { 2504 dev_err(&pdev->dev, "no IRQ%d resource found\n", i); 2505 return -ENXIO; 2506 } 2507 } 2508 for (i = 0; i < ARRAY_SIZE(eth->clks); i++) { 2509 eth->clks[i] = devm_clk_get(eth->dev, 2510 mtk_clks_source_name[i]); 2511 if (IS_ERR(eth->clks[i])) { 2512 if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER) 2513 return -EPROBE_DEFER; 2514 if (eth->soc->required_clks & BIT(i)) { 2515 dev_err(&pdev->dev, "clock %s not found\n", 2516 mtk_clks_source_name[i]); 2517 return -EINVAL; 2518 } 2519 eth->clks[i] = NULL; 2520 } 2521 } 2522 2523 eth->msg_enable = netif_msg_init(mtk_msg_level, MTK_DEFAULT_MSG_ENABLE); 2524 INIT_WORK(ð->pending_work, mtk_pending_work); 2525 2526 err = mtk_hw_init(eth); 2527 if (err) 2528 return err; 2529 2530 eth->hwlro = MTK_HAS_CAPS(eth->soc->caps, MTK_HWLRO); 2531 2532 for_each_child_of_node(pdev->dev.of_node, mac_np) { 2533 if (!of_device_is_compatible(mac_np, 2534 "mediatek,eth-mac")) 2535 continue; 2536 2537 if (!of_device_is_available(mac_np)) 2538 continue; 2539 2540 err = mtk_add_mac(eth, mac_np); 2541 if (err) 2542 goto err_deinit_hw; 2543 } 2544 2545 if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT)) { 2546 err = devm_request_irq(eth->dev, eth->irq[0], 2547 mtk_handle_irq, 0, 2548 dev_name(eth->dev), eth); 2549 } else { 2550 err = devm_request_irq(eth->dev, eth->irq[1], 2551 mtk_handle_irq_tx, 0, 2552 dev_name(eth->dev), eth); 2553 if (err) 2554 goto err_free_dev; 2555 2556 err = devm_request_irq(eth->dev, eth->irq[2], 2557 mtk_handle_irq_rx, 0, 2558 dev_name(eth->dev), eth); 2559 } 2560 if (err) 2561 goto err_free_dev; 2562 2563 err = mtk_mdio_init(eth); 2564 if (err) 2565 goto err_free_dev; 2566 2567 for (i = 0; i < MTK_MAX_DEVS; i++) { 2568 if (!eth->netdev[i]) 2569 continue; 2570 2571 err = register_netdev(eth->netdev[i]); 2572 if (err) { 2573 dev_err(eth->dev, "error bringing up device\n"); 2574 goto err_deinit_mdio; 2575 } else 2576 netif_info(eth, probe, eth->netdev[i], 2577 "mediatek frame engine at 0x%08lx, irq %d\n", 2578 eth->netdev[i]->base_addr, eth->irq[0]); 2579 } 2580 2581 /* we run 2 devices on the same DMA ring so we need a dummy device 2582 * for NAPI to work 2583 */ 2584 init_dummy_netdev(ð->dummy_dev); 2585 netif_napi_add(ð->dummy_dev, ð->tx_napi, mtk_napi_tx, 2586 MTK_NAPI_WEIGHT); 2587 netif_napi_add(ð->dummy_dev, ð->rx_napi, mtk_napi_rx, 2588 MTK_NAPI_WEIGHT); 2589 2590 platform_set_drvdata(pdev, eth); 2591 2592 return 0; 2593 2594 err_deinit_mdio: 2595 mtk_mdio_cleanup(eth); 2596 err_free_dev: 2597 mtk_free_dev(eth); 2598 err_deinit_hw: 2599 mtk_hw_deinit(eth); 2600 2601 return err; 2602 } 2603 2604 static int mtk_remove(struct platform_device *pdev) 2605 { 2606 struct mtk_eth *eth = platform_get_drvdata(pdev); 2607 int i; 2608 2609 /* stop all devices to make sure that dma is properly shut down */ 2610 for (i = 0; i < MTK_MAC_COUNT; i++) { 2611 if (!eth->netdev[i]) 2612 continue; 2613 mtk_stop(eth->netdev[i]); 2614 } 2615 2616 mtk_hw_deinit(eth); 2617 2618 netif_napi_del(ð->tx_napi); 2619 netif_napi_del(ð->rx_napi); 2620 mtk_cleanup(eth); 2621 mtk_mdio_cleanup(eth); 2622 2623 return 0; 2624 } 2625 2626 static const struct mtk_soc_data mt2701_data = { 2627 .caps = MTK_GMAC1_TRGMII | MTK_HWLRO, 2628 .required_clks = MT7623_CLKS_BITMAP, 2629 .required_pctl = true, 2630 }; 2631 2632 static const struct mtk_soc_data mt7621_data = { 2633 .caps = MTK_SHARED_INT, 2634 .required_clks = MT7621_CLKS_BITMAP, 2635 .required_pctl = false, 2636 }; 2637 2638 static const struct mtk_soc_data mt7622_data = { 2639 .caps = MTK_DUAL_GMAC_SHARED_SGMII | MTK_GMAC1_ESW | MTK_HWLRO, 2640 .required_clks = MT7622_CLKS_BITMAP, 2641 .required_pctl = false, 2642 }; 2643 2644 static const struct mtk_soc_data mt7623_data = { 2645 .caps = MTK_GMAC1_TRGMII | MTK_HWLRO, 2646 .required_clks = MT7623_CLKS_BITMAP, 2647 .required_pctl = true, 2648 }; 2649 2650 const struct of_device_id of_mtk_match[] = { 2651 { .compatible = "mediatek,mt2701-eth", .data = &mt2701_data}, 2652 { .compatible = "mediatek,mt7621-eth", .data = &mt7621_data}, 2653 { .compatible = "mediatek,mt7622-eth", .data = &mt7622_data}, 2654 { .compatible = "mediatek,mt7623-eth", .data = &mt7623_data}, 2655 {}, 2656 }; 2657 MODULE_DEVICE_TABLE(of, of_mtk_match); 2658 2659 static struct platform_driver mtk_driver = { 2660 .probe = mtk_probe, 2661 .remove = mtk_remove, 2662 .driver = { 2663 .name = "mtk_soc_eth", 2664 .of_match_table = of_mtk_match, 2665 }, 2666 }; 2667 2668 module_platform_driver(mtk_driver); 2669 2670 MODULE_LICENSE("GPL"); 2671 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); 2672 MODULE_DESCRIPTION("Ethernet driver for MediaTek SoC"); 2673