1 /* This program is free software; you can redistribute it and/or modify
2 * it under the terms of the GNU General Public License as published by
3 * the Free Software Foundation; version 2 of the License
5 * This program is distributed in the hope that it will be useful,
6 * but WITHOUT ANY WARRANTY; without even the implied warranty of
7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
8 * GNU General Public License for more details.
10 * Copyright (C) 2009-2016 John Crispin <blogic@openwrt.org>
11 * Copyright (C) 2009-2016 Felix Fietkau <nbd@openwrt.org>
12 * Copyright (C) 2013-2016 Michael Lee <igvtee@gmail.com>
15 #include <linux/of_device.h>
16 #include <linux/of_mdio.h>
17 #include <linux/of_net.h>
18 #include <linux/mfd/syscon.h>
19 #include <linux/regmap.h>
20 #include <linux/clk.h>
21 #include <linux/if_vlan.h>
22 #include <linux/reset.h>
23 #include <linux/tcp.h>
25 #include "mtk_eth_soc.h"
27 static int mtk_msg_level = -1;
28 module_param_named(msg_level, mtk_msg_level, int, 0);
29 MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
31 #define MTK_ETHTOOL_STAT(x) { #x, \
32 offsetof(struct mtk_hw_stats, x) / sizeof(u64) }
34 /* strings used by ethtool */
35 static const struct mtk_ethtool_stats {
36 char str[ETH_GSTRING_LEN];
38 } mtk_ethtool_stats[] = {
39 MTK_ETHTOOL_STAT(tx_bytes),
40 MTK_ETHTOOL_STAT(tx_packets),
41 MTK_ETHTOOL_STAT(tx_skip),
42 MTK_ETHTOOL_STAT(tx_collisions),
43 MTK_ETHTOOL_STAT(rx_bytes),
44 MTK_ETHTOOL_STAT(rx_packets),
45 MTK_ETHTOOL_STAT(rx_overflow),
46 MTK_ETHTOOL_STAT(rx_fcs_errors),
47 MTK_ETHTOOL_STAT(rx_short_errors),
48 MTK_ETHTOOL_STAT(rx_long_errors),
49 MTK_ETHTOOL_STAT(rx_checksum_errors),
50 MTK_ETHTOOL_STAT(rx_flow_control_packets),
53 static const char * const mtk_clks_source_name[] = {
54 "ethif", "esw", "gp1", "gp2"
57 void mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg)
59 __raw_writel(val, eth->base + reg);
62 u32 mtk_r32(struct mtk_eth *eth, unsigned reg)
64 return __raw_readl(eth->base + reg);
67 static int mtk_mdio_busy_wait(struct mtk_eth *eth)
69 unsigned long t_start = jiffies;
72 if (!(mtk_r32(eth, MTK_PHY_IAC) & PHY_IAC_ACCESS))
74 if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT))
79 dev_err(eth->dev, "mdio: MDIO timeout\n");
83 static u32 _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr,
84 u32 phy_register, u32 write_data)
86 if (mtk_mdio_busy_wait(eth))
91 mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE |
92 (phy_register << PHY_IAC_REG_SHIFT) |
93 (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data,
96 if (mtk_mdio_busy_wait(eth))
102 static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg)
106 if (mtk_mdio_busy_wait(eth))
109 mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ |
110 (phy_reg << PHY_IAC_REG_SHIFT) |
111 (phy_addr << PHY_IAC_ADDR_SHIFT),
114 if (mtk_mdio_busy_wait(eth))
117 d = mtk_r32(eth, MTK_PHY_IAC) & 0xffff;
122 static int mtk_mdio_write(struct mii_bus *bus, int phy_addr,
123 int phy_reg, u16 val)
125 struct mtk_eth *eth = bus->priv;
127 return _mtk_mdio_write(eth, phy_addr, phy_reg, val);
130 static int mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
132 struct mtk_eth *eth = bus->priv;
134 return _mtk_mdio_read(eth, phy_addr, phy_reg);
137 static void mtk_phy_link_adjust(struct net_device *dev)
139 struct mtk_mac *mac = netdev_priv(dev);
140 u16 lcl_adv = 0, rmt_adv = 0;
142 u32 mcr = MAC_MCR_MAX_RX_1536 | MAC_MCR_IPG_CFG |
143 MAC_MCR_FORCE_MODE | MAC_MCR_TX_EN |
144 MAC_MCR_RX_EN | MAC_MCR_BACKOFF_EN |
147 switch (mac->phy_dev->speed) {
149 mcr |= MAC_MCR_SPEED_1000;
152 mcr |= MAC_MCR_SPEED_100;
156 if (mac->phy_dev->link)
157 mcr |= MAC_MCR_FORCE_LINK;
159 if (mac->phy_dev->duplex) {
160 mcr |= MAC_MCR_FORCE_DPX;
162 if (mac->phy_dev->pause)
163 rmt_adv = LPA_PAUSE_CAP;
164 if (mac->phy_dev->asym_pause)
165 rmt_adv |= LPA_PAUSE_ASYM;
167 if (mac->phy_dev->advertising & ADVERTISED_Pause)
168 lcl_adv |= ADVERTISE_PAUSE_CAP;
169 if (mac->phy_dev->advertising & ADVERTISED_Asym_Pause)
170 lcl_adv |= ADVERTISE_PAUSE_ASYM;
172 flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
174 if (flowctrl & FLOW_CTRL_TX)
175 mcr |= MAC_MCR_FORCE_TX_FC;
176 if (flowctrl & FLOW_CTRL_RX)
177 mcr |= MAC_MCR_FORCE_RX_FC;
179 netif_dbg(mac->hw, link, dev, "rx pause %s, tx pause %s\n",
180 flowctrl & FLOW_CTRL_RX ? "enabled" : "disabled",
181 flowctrl & FLOW_CTRL_TX ? "enabled" : "disabled");
184 mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
186 if (mac->phy_dev->link)
187 netif_carrier_on(dev);
189 netif_carrier_off(dev);
192 static int mtk_phy_connect_node(struct mtk_eth *eth, struct mtk_mac *mac,
193 struct device_node *phy_node)
195 const __be32 *_addr = NULL;
196 struct phy_device *phydev;
199 _addr = of_get_property(phy_node, "reg", NULL);
201 if (!_addr || (be32_to_cpu(*_addr) >= 0x20)) {
202 pr_err("%s: invalid phy address\n", phy_node->name);
205 addr = be32_to_cpu(*_addr);
206 phy_mode = of_get_phy_mode(phy_node);
208 dev_err(eth->dev, "incorrect phy-mode %d\n", phy_mode);
212 phydev = of_phy_connect(eth->netdev[mac->id], phy_node,
213 mtk_phy_link_adjust, 0, phy_mode);
215 dev_err(eth->dev, "could not connect to PHY\n");
220 "connected mac %d to PHY at %s [uid=%08x, driver=%s]\n",
221 mac->id, phydev_name(phydev), phydev->phy_id,
224 mac->phy_dev = phydev;
229 static int mtk_phy_connect(struct mtk_mac *mac)
231 struct mtk_eth *eth = mac->hw;
232 struct device_node *np;
235 np = of_parse_phandle(mac->of_node, "phy-handle", 0);
236 if (!np && of_phy_is_fixed_link(mac->of_node))
237 if (!of_phy_register_fixed_link(mac->of_node))
238 np = of_node_get(mac->of_node);
242 switch (of_get_phy_mode(np)) {
243 case PHY_INTERFACE_MODE_RGMII_TXID:
244 case PHY_INTERFACE_MODE_RGMII_RXID:
245 case PHY_INTERFACE_MODE_RGMII_ID:
246 case PHY_INTERFACE_MODE_RGMII:
249 case PHY_INTERFACE_MODE_MII:
252 case PHY_INTERFACE_MODE_REVMII:
255 case PHY_INTERFACE_MODE_RMII:
264 /* put the gmac into the right mode */
265 regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
266 val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, mac->id);
267 val |= SYSCFG0_GE_MODE(ge_mode, mac->id);
268 regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val);
270 mtk_phy_connect_node(eth, mac, np);
271 mac->phy_dev->autoneg = AUTONEG_ENABLE;
272 mac->phy_dev->speed = 0;
273 mac->phy_dev->duplex = 0;
275 if (of_phy_is_fixed_link(mac->of_node))
276 mac->phy_dev->supported |=
277 SUPPORTED_Pause | SUPPORTED_Asym_Pause;
279 mac->phy_dev->supported &= PHY_GBIT_FEATURES | SUPPORTED_Pause |
280 SUPPORTED_Asym_Pause;
281 mac->phy_dev->advertising = mac->phy_dev->supported |
283 phy_start_aneg(mac->phy_dev);
291 dev_err(eth->dev, "invalid phy_mode\n");
295 static int mtk_mdio_init(struct mtk_eth *eth)
297 struct device_node *mii_np;
300 mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus");
302 dev_err(eth->dev, "no %s child node found", "mdio-bus");
306 if (!of_device_is_available(mii_np)) {
311 eth->mii_bus = devm_mdiobus_alloc(eth->dev);
317 eth->mii_bus->name = "mdio";
318 eth->mii_bus->read = mtk_mdio_read;
319 eth->mii_bus->write = mtk_mdio_write;
320 eth->mii_bus->priv = eth;
321 eth->mii_bus->parent = eth->dev;
323 snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%s", mii_np->name);
324 ret = of_mdiobus_register(eth->mii_bus, mii_np);
331 static void mtk_mdio_cleanup(struct mtk_eth *eth)
336 mdiobus_unregister(eth->mii_bus);
339 static inline void mtk_irq_disable(struct mtk_eth *eth, u32 mask)
344 spin_lock_irqsave(ð->irq_lock, flags);
345 val = mtk_r32(eth, MTK_QDMA_INT_MASK);
346 mtk_w32(eth, val & ~mask, MTK_QDMA_INT_MASK);
347 spin_unlock_irqrestore(ð->irq_lock, flags);
350 static inline void mtk_irq_enable(struct mtk_eth *eth, u32 mask)
355 spin_lock_irqsave(ð->irq_lock, flags);
356 val = mtk_r32(eth, MTK_QDMA_INT_MASK);
357 mtk_w32(eth, val | mask, MTK_QDMA_INT_MASK);
358 spin_unlock_irqrestore(ð->irq_lock, flags);
361 static int mtk_set_mac_address(struct net_device *dev, void *p)
363 int ret = eth_mac_addr(dev, p);
364 struct mtk_mac *mac = netdev_priv(dev);
365 const char *macaddr = dev->dev_addr;
371 spin_lock_irqsave(&mac->hw->page_lock, flags);
372 mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1],
373 MTK_GDMA_MAC_ADRH(mac->id));
374 mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) |
375 (macaddr[4] << 8) | macaddr[5],
376 MTK_GDMA_MAC_ADRL(mac->id));
377 spin_unlock_irqrestore(&mac->hw->page_lock, flags);
382 void mtk_stats_update_mac(struct mtk_mac *mac)
384 struct mtk_hw_stats *hw_stats = mac->hw_stats;
385 unsigned int base = MTK_GDM1_TX_GBCNT;
388 base += hw_stats->reg_offset;
390 u64_stats_update_begin(&hw_stats->syncp);
392 hw_stats->rx_bytes += mtk_r32(mac->hw, base);
393 stats = mtk_r32(mac->hw, base + 0x04);
395 hw_stats->rx_bytes += (stats << 32);
396 hw_stats->rx_packets += mtk_r32(mac->hw, base + 0x08);
397 hw_stats->rx_overflow += mtk_r32(mac->hw, base + 0x10);
398 hw_stats->rx_fcs_errors += mtk_r32(mac->hw, base + 0x14);
399 hw_stats->rx_short_errors += mtk_r32(mac->hw, base + 0x18);
400 hw_stats->rx_long_errors += mtk_r32(mac->hw, base + 0x1c);
401 hw_stats->rx_checksum_errors += mtk_r32(mac->hw, base + 0x20);
402 hw_stats->rx_flow_control_packets +=
403 mtk_r32(mac->hw, base + 0x24);
404 hw_stats->tx_skip += mtk_r32(mac->hw, base + 0x28);
405 hw_stats->tx_collisions += mtk_r32(mac->hw, base + 0x2c);
406 hw_stats->tx_bytes += mtk_r32(mac->hw, base + 0x30);
407 stats = mtk_r32(mac->hw, base + 0x34);
409 hw_stats->tx_bytes += (stats << 32);
410 hw_stats->tx_packets += mtk_r32(mac->hw, base + 0x38);
411 u64_stats_update_end(&hw_stats->syncp);
414 static void mtk_stats_update(struct mtk_eth *eth)
418 for (i = 0; i < MTK_MAC_COUNT; i++) {
419 if (!eth->mac[i] || !eth->mac[i]->hw_stats)
421 if (spin_trylock(ð->mac[i]->hw_stats->stats_lock)) {
422 mtk_stats_update_mac(eth->mac[i]);
423 spin_unlock(ð->mac[i]->hw_stats->stats_lock);
428 static struct rtnl_link_stats64 *mtk_get_stats64(struct net_device *dev,
429 struct rtnl_link_stats64 *storage)
431 struct mtk_mac *mac = netdev_priv(dev);
432 struct mtk_hw_stats *hw_stats = mac->hw_stats;
435 if (netif_running(dev) && netif_device_present(dev)) {
436 if (spin_trylock(&hw_stats->stats_lock)) {
437 mtk_stats_update_mac(mac);
438 spin_unlock(&hw_stats->stats_lock);
443 start = u64_stats_fetch_begin_irq(&hw_stats->syncp);
444 storage->rx_packets = hw_stats->rx_packets;
445 storage->tx_packets = hw_stats->tx_packets;
446 storage->rx_bytes = hw_stats->rx_bytes;
447 storage->tx_bytes = hw_stats->tx_bytes;
448 storage->collisions = hw_stats->tx_collisions;
449 storage->rx_length_errors = hw_stats->rx_short_errors +
450 hw_stats->rx_long_errors;
451 storage->rx_over_errors = hw_stats->rx_overflow;
452 storage->rx_crc_errors = hw_stats->rx_fcs_errors;
453 storage->rx_errors = hw_stats->rx_checksum_errors;
454 storage->tx_aborted_errors = hw_stats->tx_skip;
455 } while (u64_stats_fetch_retry_irq(&hw_stats->syncp, start));
457 storage->tx_errors = dev->stats.tx_errors;
458 storage->rx_dropped = dev->stats.rx_dropped;
459 storage->tx_dropped = dev->stats.tx_dropped;
464 static inline int mtk_max_frag_size(int mtu)
466 /* make sure buf_size will be at least MTK_MAX_RX_LENGTH */
467 if (mtu + MTK_RX_ETH_HLEN < MTK_MAX_RX_LENGTH)
468 mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN;
470 return SKB_DATA_ALIGN(MTK_RX_HLEN + mtu) +
471 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
474 static inline int mtk_max_buf_size(int frag_size)
476 int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN -
477 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
479 WARN_ON(buf_size < MTK_MAX_RX_LENGTH);
484 static inline void mtk_rx_get_desc(struct mtk_rx_dma *rxd,
485 struct mtk_rx_dma *dma_rxd)
487 rxd->rxd1 = READ_ONCE(dma_rxd->rxd1);
488 rxd->rxd2 = READ_ONCE(dma_rxd->rxd2);
489 rxd->rxd3 = READ_ONCE(dma_rxd->rxd3);
490 rxd->rxd4 = READ_ONCE(dma_rxd->rxd4);
493 /* the qdma core needs scratch memory to be setup */
494 static int mtk_init_fq_dma(struct mtk_eth *eth)
496 dma_addr_t phy_ring_tail;
497 int cnt = MTK_DMA_SIZE;
501 eth->scratch_ring = dma_alloc_coherent(eth->dev,
502 cnt * sizeof(struct mtk_tx_dma),
503 ð->phy_scratch_ring,
504 GFP_ATOMIC | __GFP_ZERO);
505 if (unlikely(!eth->scratch_ring))
508 eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE,
510 if (unlikely(!eth->scratch_head))
513 dma_addr = dma_map_single(eth->dev,
514 eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE,
516 if (unlikely(dma_mapping_error(eth->dev, dma_addr)))
519 memset(eth->scratch_ring, 0x0, sizeof(struct mtk_tx_dma) * cnt);
520 phy_ring_tail = eth->phy_scratch_ring +
521 (sizeof(struct mtk_tx_dma) * (cnt - 1));
523 for (i = 0; i < cnt; i++) {
524 eth->scratch_ring[i].txd1 =
525 (dma_addr + (i * MTK_QDMA_PAGE_SIZE));
527 eth->scratch_ring[i].txd2 = (eth->phy_scratch_ring +
528 ((i + 1) * sizeof(struct mtk_tx_dma)));
529 eth->scratch_ring[i].txd3 = TX_DMA_SDL(MTK_QDMA_PAGE_SIZE);
532 mtk_w32(eth, eth->phy_scratch_ring, MTK_QDMA_FQ_HEAD);
533 mtk_w32(eth, phy_ring_tail, MTK_QDMA_FQ_TAIL);
534 mtk_w32(eth, (cnt << 16) | cnt, MTK_QDMA_FQ_CNT);
535 mtk_w32(eth, MTK_QDMA_PAGE_SIZE << 16, MTK_QDMA_FQ_BLEN);
540 static inline void *mtk_qdma_phys_to_virt(struct mtk_tx_ring *ring, u32 desc)
542 void *ret = ring->dma;
544 return ret + (desc - ring->phys);
547 static inline struct mtk_tx_buf *mtk_desc_to_tx_buf(struct mtk_tx_ring *ring,
548 struct mtk_tx_dma *txd)
550 int idx = txd - ring->dma;
552 return &ring->buf[idx];
555 static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf)
557 if (tx_buf->flags & MTK_TX_FLAGS_SINGLE0) {
558 dma_unmap_single(eth->dev,
559 dma_unmap_addr(tx_buf, dma_addr0),
560 dma_unmap_len(tx_buf, dma_len0),
562 } else if (tx_buf->flags & MTK_TX_FLAGS_PAGE0) {
563 dma_unmap_page(eth->dev,
564 dma_unmap_addr(tx_buf, dma_addr0),
565 dma_unmap_len(tx_buf, dma_len0),
570 (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC))
571 dev_kfree_skb_any(tx_buf->skb);
575 static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev,
576 int tx_num, struct mtk_tx_ring *ring, bool gso)
578 struct mtk_mac *mac = netdev_priv(dev);
579 struct mtk_eth *eth = mac->hw;
580 struct mtk_tx_dma *itxd, *txd;
581 struct mtk_tx_buf *tx_buf;
582 dma_addr_t mapped_addr;
583 unsigned int nr_frags;
587 itxd = ring->next_free;
588 if (itxd == ring->last_free)
591 /* set the forward port */
592 fport = (mac->id + 1) << TX_DMA_FPORT_SHIFT;
595 tx_buf = mtk_desc_to_tx_buf(ring, itxd);
596 memset(tx_buf, 0, sizeof(*tx_buf));
601 /* TX Checksum offload */
602 if (skb->ip_summed == CHECKSUM_PARTIAL)
603 txd4 |= TX_DMA_CHKSUM;
605 /* VLAN header offload */
606 if (skb_vlan_tag_present(skb))
607 txd4 |= TX_DMA_INS_VLAN | skb_vlan_tag_get(skb);
609 mapped_addr = dma_map_single(eth->dev, skb->data,
610 skb_headlen(skb), DMA_TO_DEVICE);
611 if (unlikely(dma_mapping_error(eth->dev, mapped_addr)))
614 WRITE_ONCE(itxd->txd1, mapped_addr);
615 tx_buf->flags |= MTK_TX_FLAGS_SINGLE0;
616 dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr);
617 dma_unmap_len_set(tx_buf, dma_len0, skb_headlen(skb));
621 nr_frags = skb_shinfo(skb)->nr_frags;
622 for (i = 0; i < nr_frags; i++) {
623 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
624 unsigned int offset = 0;
625 int frag_size = skb_frag_size(frag);
628 bool last_frag = false;
629 unsigned int frag_map_size;
631 txd = mtk_qdma_phys_to_virt(ring, txd->txd2);
632 if (txd == ring->last_free)
636 frag_map_size = min(frag_size, MTK_TX_DMA_BUF_LEN);
637 mapped_addr = skb_frag_dma_map(eth->dev, frag, offset,
640 if (unlikely(dma_mapping_error(eth->dev, mapped_addr)))
643 if (i == nr_frags - 1 &&
644 (frag_size - frag_map_size) == 0)
647 WRITE_ONCE(txd->txd1, mapped_addr);
648 WRITE_ONCE(txd->txd3, (TX_DMA_SWC |
649 TX_DMA_PLEN0(frag_map_size) |
650 last_frag * TX_DMA_LS0));
651 WRITE_ONCE(txd->txd4, fport);
653 tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC;
654 tx_buf = mtk_desc_to_tx_buf(ring, txd);
655 memset(tx_buf, 0, sizeof(*tx_buf));
657 tx_buf->flags |= MTK_TX_FLAGS_PAGE0;
658 dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr);
659 dma_unmap_len_set(tx_buf, dma_len0, frag_map_size);
660 frag_size -= frag_map_size;
661 offset += frag_map_size;
665 /* store skb to cleanup */
668 WRITE_ONCE(itxd->txd4, txd4);
669 WRITE_ONCE(itxd->txd3, (TX_DMA_SWC | TX_DMA_PLEN0(skb_headlen(skb)) |
670 (!nr_frags * TX_DMA_LS0)));
672 netdev_sent_queue(dev, skb->len);
673 skb_tx_timestamp(skb);
675 ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2);
676 atomic_sub(n_desc, &ring->free_count);
678 /* make sure that all changes to the dma ring are flushed before we
683 if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) || !skb->xmit_more)
684 mtk_w32(eth, txd->txd2, MTK_QTX_CTX_PTR);
690 tx_buf = mtk_desc_to_tx_buf(ring, itxd);
693 mtk_tx_unmap(eth, tx_buf);
695 itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU;
696 itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2);
697 } while (itxd != txd);
702 static inline int mtk_cal_txd_req(struct sk_buff *skb)
705 struct skb_frag_struct *frag;
708 if (skb_is_gso(skb)) {
709 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
710 frag = &skb_shinfo(skb)->frags[i];
711 nfrags += DIV_ROUND_UP(frag->size, MTK_TX_DMA_BUF_LEN);
714 nfrags += skb_shinfo(skb)->nr_frags;
720 static int mtk_queue_stopped(struct mtk_eth *eth)
724 for (i = 0; i < MTK_MAC_COUNT; i++) {
727 if (netif_queue_stopped(eth->netdev[i]))
734 static void mtk_wake_queue(struct mtk_eth *eth)
738 for (i = 0; i < MTK_MAC_COUNT; i++) {
741 netif_wake_queue(eth->netdev[i]);
745 static void mtk_stop_queue(struct mtk_eth *eth)
749 for (i = 0; i < MTK_MAC_COUNT; i++) {
752 netif_stop_queue(eth->netdev[i]);
756 static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev)
758 struct mtk_mac *mac = netdev_priv(dev);
759 struct mtk_eth *eth = mac->hw;
760 struct mtk_tx_ring *ring = ð->tx_ring;
761 struct net_device_stats *stats = &dev->stats;
766 /* normally we can rely on the stack not calling this more than once,
767 * however we have 2 queues running on the same ring so we need to lock
770 spin_lock_irqsave(ð->page_lock, flags);
772 tx_num = mtk_cal_txd_req(skb);
773 if (unlikely(atomic_read(&ring->free_count) <= tx_num)) {
775 netif_err(eth, tx_queued, dev,
776 "Tx Ring full when queue awake!\n");
777 spin_unlock_irqrestore(ð->page_lock, flags);
778 return NETDEV_TX_BUSY;
781 /* TSO: fill MSS info in tcp checksum field */
782 if (skb_is_gso(skb)) {
783 if (skb_cow_head(skb, 0)) {
784 netif_warn(eth, tx_err, dev,
785 "GSO expand head fail.\n");
789 if (skb_shinfo(skb)->gso_type &
790 (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
792 tcp_hdr(skb)->check = htons(skb_shinfo(skb)->gso_size);
796 if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0)
799 if (unlikely(atomic_read(&ring->free_count) <= ring->thresh))
802 spin_unlock_irqrestore(ð->page_lock, flags);
807 spin_unlock_irqrestore(ð->page_lock, flags);
813 static int mtk_poll_rx(struct napi_struct *napi, int budget,
816 struct mtk_rx_ring *ring = ð->rx_ring;
817 int idx = ring->calc_idx;
820 struct mtk_rx_dma *rxd, trxd;
823 while (done < budget) {
824 struct net_device *netdev;
829 idx = NEXT_RX_DESP_IDX(idx);
830 rxd = &ring->dma[idx];
831 data = ring->data[idx];
833 mtk_rx_get_desc(&trxd, rxd);
834 if (!(trxd.rxd2 & RX_DMA_DONE))
837 /* find out which mac the packet come from. values start at 1 */
838 mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) &
842 netdev = eth->netdev[mac];
844 /* alloc new buffer */
845 new_data = napi_alloc_frag(ring->frag_size);
846 if (unlikely(!new_data)) {
847 netdev->stats.rx_dropped++;
850 dma_addr = dma_map_single(eth->dev,
851 new_data + NET_SKB_PAD,
854 if (unlikely(dma_mapping_error(eth->dev, dma_addr))) {
855 skb_free_frag(new_data);
856 netdev->stats.rx_dropped++;
861 skb = build_skb(data, ring->frag_size);
862 if (unlikely(!skb)) {
863 skb_free_frag(new_data);
864 netdev->stats.rx_dropped++;
867 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
869 dma_unmap_single(eth->dev, trxd.rxd1,
870 ring->buf_size, DMA_FROM_DEVICE);
871 pktlen = RX_DMA_GET_PLEN0(trxd.rxd2);
873 skb_put(skb, pktlen);
874 if (trxd.rxd4 & RX_DMA_L4_VALID)
875 skb->ip_summed = CHECKSUM_UNNECESSARY;
877 skb_checksum_none_assert(skb);
878 skb->protocol = eth_type_trans(skb, netdev);
880 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX &&
881 RX_DMA_VID(trxd.rxd3))
882 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
883 RX_DMA_VID(trxd.rxd3));
884 napi_gro_receive(napi, skb);
886 ring->data[idx] = new_data;
887 rxd->rxd1 = (unsigned int)dma_addr;
890 rxd->rxd2 = RX_DMA_PLEN0(ring->buf_size);
892 ring->calc_idx = idx;
893 /* make sure that all changes to the dma ring are flushed before
897 mtk_w32(eth, ring->calc_idx, MTK_QRX_CRX_IDX0);
902 mtk_w32(eth, MTK_RX_DONE_INT, MTK_QMTK_INT_STATUS);
907 static int mtk_poll_tx(struct mtk_eth *eth, int budget)
909 struct mtk_tx_ring *ring = ð->tx_ring;
910 struct mtk_tx_dma *desc;
912 struct mtk_tx_buf *tx_buf;
913 unsigned int done[MTK_MAX_DEVS];
914 unsigned int bytes[MTK_MAX_DEVS];
916 static int condition;
919 memset(done, 0, sizeof(done));
920 memset(bytes, 0, sizeof(bytes));
922 cpu = mtk_r32(eth, MTK_QTX_CRX_PTR);
923 dma = mtk_r32(eth, MTK_QTX_DRX_PTR);
925 desc = mtk_qdma_phys_to_virt(ring, cpu);
927 while ((cpu != dma) && budget) {
928 u32 next_cpu = desc->txd2;
931 desc = mtk_qdma_phys_to_virt(ring, desc->txd2);
932 if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0)
935 mac = (desc->txd4 >> TX_DMA_FPORT_SHIFT) &
939 tx_buf = mtk_desc_to_tx_buf(ring, desc);
946 if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) {
947 bytes[mac] += skb->len;
951 mtk_tx_unmap(eth, tx_buf);
953 ring->last_free = desc;
954 atomic_inc(&ring->free_count);
959 mtk_w32(eth, cpu, MTK_QTX_CRX_PTR);
961 for (i = 0; i < MTK_MAC_COUNT; i++) {
962 if (!eth->netdev[i] || !done[i])
964 netdev_completed_queue(eth->netdev[i], done[i], bytes[i]);
968 if (mtk_queue_stopped(eth) &&
969 (atomic_read(&ring->free_count) > ring->thresh))
975 static void mtk_handle_status_irq(struct mtk_eth *eth)
977 u32 status2 = mtk_r32(eth, MTK_INT_STATUS2);
979 if (unlikely(status2 & (MTK_GDM1_AF | MTK_GDM2_AF))) {
980 mtk_stats_update(eth);
981 mtk_w32(eth, (MTK_GDM1_AF | MTK_GDM2_AF),
986 static int mtk_napi_tx(struct napi_struct *napi, int budget)
988 struct mtk_eth *eth = container_of(napi, struct mtk_eth, tx_napi);
992 mtk_handle_status_irq(eth);
993 mtk_w32(eth, MTK_TX_DONE_INT, MTK_QMTK_INT_STATUS);
994 tx_done = mtk_poll_tx(eth, budget);
996 if (unlikely(netif_msg_intr(eth))) {
997 status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
998 mask = mtk_r32(eth, MTK_QDMA_INT_MASK);
1000 "done tx %d, intr 0x%08x/0x%x\n",
1001 tx_done, status, mask);
1004 if (tx_done == budget)
1007 status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
1008 if (status & MTK_TX_DONE_INT)
1011 napi_complete(napi);
1012 mtk_irq_enable(eth, MTK_TX_DONE_INT);
1017 static int mtk_napi_rx(struct napi_struct *napi, int budget)
1019 struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi);
1023 mtk_handle_status_irq(eth);
1024 mtk_w32(eth, MTK_RX_DONE_INT, MTK_QMTK_INT_STATUS);
1025 rx_done = mtk_poll_rx(napi, budget, eth);
1027 if (unlikely(netif_msg_intr(eth))) {
1028 status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
1029 mask = mtk_r32(eth, MTK_QDMA_INT_MASK);
1031 "done rx %d, intr 0x%08x/0x%x\n",
1032 rx_done, status, mask);
1035 if (rx_done == budget)
1038 status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
1039 if (status & MTK_RX_DONE_INT)
1042 napi_complete(napi);
1043 mtk_irq_enable(eth, MTK_RX_DONE_INT);
1048 static int mtk_tx_alloc(struct mtk_eth *eth)
1050 struct mtk_tx_ring *ring = ð->tx_ring;
1051 int i, sz = sizeof(*ring->dma);
1053 ring->buf = kcalloc(MTK_DMA_SIZE, sizeof(*ring->buf),
1058 ring->dma = dma_alloc_coherent(eth->dev,
1061 GFP_ATOMIC | __GFP_ZERO);
1065 memset(ring->dma, 0, MTK_DMA_SIZE * sz);
1066 for (i = 0; i < MTK_DMA_SIZE; i++) {
1067 int next = (i + 1) % MTK_DMA_SIZE;
1068 u32 next_ptr = ring->phys + next * sz;
1070 ring->dma[i].txd2 = next_ptr;
1071 ring->dma[i].txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU;
1074 atomic_set(&ring->free_count, MTK_DMA_SIZE - 2);
1075 ring->next_free = &ring->dma[0];
1076 ring->last_free = &ring->dma[MTK_DMA_SIZE - 1];
1077 ring->thresh = MAX_SKB_FRAGS;
1079 /* make sure that all changes to the dma ring are flushed before we
1084 mtk_w32(eth, ring->phys, MTK_QTX_CTX_PTR);
1085 mtk_w32(eth, ring->phys, MTK_QTX_DTX_PTR);
1087 ring->phys + ((MTK_DMA_SIZE - 1) * sz),
1090 ring->phys + ((MTK_DMA_SIZE - 1) * sz),
1099 static void mtk_tx_clean(struct mtk_eth *eth)
1101 struct mtk_tx_ring *ring = ð->tx_ring;
1105 for (i = 0; i < MTK_DMA_SIZE; i++)
1106 mtk_tx_unmap(eth, &ring->buf[i]);
1112 dma_free_coherent(eth->dev,
1113 MTK_DMA_SIZE * sizeof(*ring->dma),
1120 static int mtk_rx_alloc(struct mtk_eth *eth)
1122 struct mtk_rx_ring *ring = ð->rx_ring;
1125 ring->frag_size = mtk_max_frag_size(ETH_DATA_LEN);
1126 ring->buf_size = mtk_max_buf_size(ring->frag_size);
1127 ring->data = kcalloc(MTK_DMA_SIZE, sizeof(*ring->data),
1132 for (i = 0; i < MTK_DMA_SIZE; i++) {
1133 ring->data[i] = netdev_alloc_frag(ring->frag_size);
1138 ring->dma = dma_alloc_coherent(eth->dev,
1139 MTK_DMA_SIZE * sizeof(*ring->dma),
1141 GFP_ATOMIC | __GFP_ZERO);
1145 for (i = 0; i < MTK_DMA_SIZE; i++) {
1146 dma_addr_t dma_addr = dma_map_single(eth->dev,
1147 ring->data[i] + NET_SKB_PAD,
1150 if (unlikely(dma_mapping_error(eth->dev, dma_addr)))
1152 ring->dma[i].rxd1 = (unsigned int)dma_addr;
1154 ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size);
1156 ring->calc_idx = MTK_DMA_SIZE - 1;
1157 /* make sure that all changes to the dma ring are flushed before we
1162 mtk_w32(eth, eth->rx_ring.phys, MTK_QRX_BASE_PTR0);
1163 mtk_w32(eth, MTK_DMA_SIZE, MTK_QRX_MAX_CNT0);
1164 mtk_w32(eth, eth->rx_ring.calc_idx, MTK_QRX_CRX_IDX0);
1165 mtk_w32(eth, MTK_PST_DRX_IDX0, MTK_QDMA_RST_IDX);
1166 mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES, MTK_QTX_CFG(0));
1171 static void mtk_rx_clean(struct mtk_eth *eth)
1173 struct mtk_rx_ring *ring = ð->rx_ring;
1176 if (ring->data && ring->dma) {
1177 for (i = 0; i < MTK_DMA_SIZE; i++) {
1180 if (!ring->dma[i].rxd1)
1182 dma_unmap_single(eth->dev,
1186 skb_free_frag(ring->data[i]);
1193 dma_free_coherent(eth->dev,
1194 MTK_DMA_SIZE * sizeof(*ring->dma),
1201 /* wait for DMA to finish whatever it is doing before we start using it again */
1202 static int mtk_dma_busy_wait(struct mtk_eth *eth)
1204 unsigned long t_start = jiffies;
1207 if (!(mtk_r32(eth, MTK_QDMA_GLO_CFG) &
1208 (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY)))
1210 if (time_after(jiffies, t_start + MTK_DMA_BUSY_TIMEOUT))
1214 dev_err(eth->dev, "DMA init timeout\n");
1218 static int mtk_dma_init(struct mtk_eth *eth)
1222 if (mtk_dma_busy_wait(eth))
1225 /* QDMA needs scratch memory for internal reordering of the
1228 err = mtk_init_fq_dma(eth);
1232 err = mtk_tx_alloc(eth);
1236 err = mtk_rx_alloc(eth);
1240 /* Enable random early drop and set drop threshold automatically */
1241 mtk_w32(eth, FC_THRES_DROP_MODE | FC_THRES_DROP_EN | FC_THRES_MIN,
1243 mtk_w32(eth, 0x0, MTK_QDMA_HRED2);
1248 static void mtk_dma_free(struct mtk_eth *eth)
1252 for (i = 0; i < MTK_MAC_COUNT; i++)
1254 netdev_reset_queue(eth->netdev[i]);
1255 if (eth->scratch_ring) {
1256 dma_free_coherent(eth->dev,
1257 MTK_DMA_SIZE * sizeof(struct mtk_tx_dma),
1259 eth->phy_scratch_ring);
1260 eth->scratch_ring = NULL;
1261 eth->phy_scratch_ring = 0;
1265 kfree(eth->scratch_head);
1268 static void mtk_tx_timeout(struct net_device *dev)
1270 struct mtk_mac *mac = netdev_priv(dev);
1271 struct mtk_eth *eth = mac->hw;
1273 eth->netdev[mac->id]->stats.tx_errors++;
1274 netif_err(eth, tx_err, dev,
1275 "transmit timed out\n");
1276 schedule_work(ð->pending_work);
1279 static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth)
1281 struct mtk_eth *eth = _eth;
1283 if (likely(napi_schedule_prep(ð->rx_napi))) {
1284 __napi_schedule(ð->rx_napi);
1285 mtk_irq_disable(eth, MTK_RX_DONE_INT);
1291 static irqreturn_t mtk_handle_irq_tx(int irq, void *_eth)
1293 struct mtk_eth *eth = _eth;
1295 if (likely(napi_schedule_prep(ð->tx_napi))) {
1296 __napi_schedule(ð->tx_napi);
1297 mtk_irq_disable(eth, MTK_TX_DONE_INT);
1303 #ifdef CONFIG_NET_POLL_CONTROLLER
1304 static void mtk_poll_controller(struct net_device *dev)
1306 struct mtk_mac *mac = netdev_priv(dev);
1307 struct mtk_eth *eth = mac->hw;
1308 u32 int_mask = MTK_TX_DONE_INT | MTK_RX_DONE_INT;
1310 mtk_irq_disable(eth, int_mask);
1311 mtk_handle_irq_rx(eth->irq[2], dev);
1312 mtk_irq_enable(eth, int_mask);
1316 static int mtk_start_dma(struct mtk_eth *eth)
1320 err = mtk_dma_init(eth);
1327 MTK_TX_WB_DDONE | MTK_RX_DMA_EN | MTK_TX_DMA_EN |
1328 MTK_RX_2B_OFFSET | MTK_DMA_SIZE_16DWORDS |
1329 MTK_RX_BT_32DWORDS | MTK_NDP_CO_PRO,
1335 static int mtk_open(struct net_device *dev)
1337 struct mtk_mac *mac = netdev_priv(dev);
1338 struct mtk_eth *eth = mac->hw;
1340 /* we run 2 netdevs on the same dma ring so we only bring it up once */
1341 if (!atomic_read(ð->dma_refcnt)) {
1342 int err = mtk_start_dma(eth);
1347 napi_enable(ð->tx_napi);
1348 napi_enable(ð->rx_napi);
1349 mtk_irq_enable(eth, MTK_TX_DONE_INT | MTK_RX_DONE_INT);
1351 atomic_inc(ð->dma_refcnt);
1353 phy_start(mac->phy_dev);
1354 netif_start_queue(dev);
1359 static void mtk_stop_dma(struct mtk_eth *eth, u32 glo_cfg)
1361 unsigned long flags;
1365 /* stop the dma engine */
1366 spin_lock_irqsave(ð->page_lock, flags);
1367 val = mtk_r32(eth, glo_cfg);
1368 mtk_w32(eth, val & ~(MTK_TX_WB_DDONE | MTK_RX_DMA_EN | MTK_TX_DMA_EN),
1370 spin_unlock_irqrestore(ð->page_lock, flags);
1372 /* wait for dma stop */
1373 for (i = 0; i < 10; i++) {
1374 val = mtk_r32(eth, glo_cfg);
1375 if (val & (MTK_TX_DMA_BUSY | MTK_RX_DMA_BUSY)) {
1383 static int mtk_stop(struct net_device *dev)
1385 struct mtk_mac *mac = netdev_priv(dev);
1386 struct mtk_eth *eth = mac->hw;
1388 netif_tx_disable(dev);
1389 phy_stop(mac->phy_dev);
1391 /* only shutdown DMA if this is the last user */
1392 if (!atomic_dec_and_test(ð->dma_refcnt))
1395 mtk_irq_disable(eth, MTK_TX_DONE_INT | MTK_RX_DONE_INT);
1396 napi_disable(ð->tx_napi);
1397 napi_disable(ð->rx_napi);
1399 mtk_stop_dma(eth, MTK_QDMA_GLO_CFG);
1406 static int __init mtk_hw_init(struct mtk_eth *eth)
1410 /* reset the frame engine */
1411 reset_control_assert(eth->rstc);
1412 usleep_range(10, 20);
1413 reset_control_deassert(eth->rstc);
1414 usleep_range(10, 20);
1416 /* Set GE2 driving and slew rate */
1417 regmap_write(eth->pctl, GPIO_DRV_SEL10, 0xa00);
1420 regmap_write(eth->pctl, GPIO_OD33_CTRL8, 0x5);
1423 regmap_write(eth->pctl, GPIO_BIAS_CTRL, 0x0);
1425 /* GE1, Force 1000M/FD, FC ON */
1426 mtk_w32(eth, MAC_MCR_FIXED_LINK, MTK_MAC_MCR(0));
1428 /* GE2, Force 1000M/FD, FC ON */
1429 mtk_w32(eth, MAC_MCR_FIXED_LINK, MTK_MAC_MCR(1));
1431 /* Enable RX VLan Offloading */
1432 mtk_w32(eth, 1, MTK_CDMP_EG_CTRL);
1434 err = devm_request_irq(eth->dev, eth->irq[1], mtk_handle_irq_tx, 0,
1435 dev_name(eth->dev), eth);
1438 err = devm_request_irq(eth->dev, eth->irq[2], mtk_handle_irq_rx, 0,
1439 dev_name(eth->dev), eth);
1443 err = mtk_mdio_init(eth);
1447 /* disable delay and normal interrupt */
1448 mtk_w32(eth, 0, MTK_QDMA_DELAY_INT);
1449 mtk_irq_disable(eth, ~0);
1450 mtk_w32(eth, RST_GL_PSE, MTK_RST_GL);
1451 mtk_w32(eth, 0, MTK_RST_GL);
1453 /* FE int grouping */
1454 mtk_w32(eth, MTK_TX_DONE_INT, MTK_PDMA_INT_GRP1);
1455 mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_GRP2);
1456 mtk_w32(eth, MTK_TX_DONE_INT, MTK_QDMA_INT_GRP1);
1457 mtk_w32(eth, MTK_RX_DONE_INT, MTK_QDMA_INT_GRP2);
1458 mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP);
1460 for (i = 0; i < 2; i++) {
1461 u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i));
1463 /* setup the forward port to send frame to QDMA */
1467 /* Enable RX checksum */
1468 val |= MTK_GDMA_ICS_EN | MTK_GDMA_TCS_EN | MTK_GDMA_UCS_EN;
1470 /* setup the mac dma */
1471 mtk_w32(eth, val, MTK_GDMA_FWD_CFG(i));
1477 static int __init mtk_init(struct net_device *dev)
1479 struct mtk_mac *mac = netdev_priv(dev);
1480 struct mtk_eth *eth = mac->hw;
1481 const char *mac_addr;
1483 mac_addr = of_get_mac_address(mac->of_node);
1485 ether_addr_copy(dev->dev_addr, mac_addr);
1487 /* If the mac address is invalid, use random mac address */
1488 if (!is_valid_ether_addr(dev->dev_addr)) {
1489 random_ether_addr(dev->dev_addr);
1490 dev_err(eth->dev, "generated random MAC address %pM\n",
1492 dev->addr_assign_type = NET_ADDR_RANDOM;
1495 return mtk_phy_connect(mac);
1498 static void mtk_uninit(struct net_device *dev)
1500 struct mtk_mac *mac = netdev_priv(dev);
1501 struct mtk_eth *eth = mac->hw;
1503 phy_disconnect(mac->phy_dev);
1504 mtk_irq_disable(eth, ~0);
1507 static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1509 struct mtk_mac *mac = netdev_priv(dev);
1515 return phy_mii_ioctl(mac->phy_dev, ifr, cmd);
1523 static void mtk_pending_work(struct work_struct *work)
1525 struct mtk_eth *eth = container_of(work, struct mtk_eth, pending_work);
1527 unsigned long restart = 0;
1531 /* stop all devices to make sure that dma is properly shut down */
1532 for (i = 0; i < MTK_MAC_COUNT; i++) {
1533 if (!eth->netdev[i])
1535 mtk_stop(eth->netdev[i]);
1536 __set_bit(i, &restart);
1539 /* restart DMA and enable IRQs */
1540 for (i = 0; i < MTK_MAC_COUNT; i++) {
1541 if (!test_bit(i, &restart))
1543 err = mtk_open(eth->netdev[i]);
1545 netif_alert(eth, ifup, eth->netdev[i],
1546 "Driver up/down cycle failed, closing device.\n");
1547 dev_close(eth->netdev[i]);
1553 static int mtk_cleanup(struct mtk_eth *eth)
1557 for (i = 0; i < MTK_MAC_COUNT; i++) {
1558 if (!eth->netdev[i])
1561 unregister_netdev(eth->netdev[i]);
1562 free_netdev(eth->netdev[i]);
1564 cancel_work_sync(ð->pending_work);
1569 static int mtk_get_settings(struct net_device *dev,
1570 struct ethtool_cmd *cmd)
1572 struct mtk_mac *mac = netdev_priv(dev);
1575 err = phy_read_status(mac->phy_dev);
1579 return phy_ethtool_gset(mac->phy_dev, cmd);
1582 static int mtk_set_settings(struct net_device *dev,
1583 struct ethtool_cmd *cmd)
1585 struct mtk_mac *mac = netdev_priv(dev);
1587 if (cmd->phy_address != mac->phy_dev->mdio.addr) {
1588 mac->phy_dev = mdiobus_get_phy(mac->hw->mii_bus,
1594 return phy_ethtool_sset(mac->phy_dev, cmd);
1597 static void mtk_get_drvinfo(struct net_device *dev,
1598 struct ethtool_drvinfo *info)
1600 struct mtk_mac *mac = netdev_priv(dev);
1602 strlcpy(info->driver, mac->hw->dev->driver->name, sizeof(info->driver));
1603 strlcpy(info->bus_info, dev_name(mac->hw->dev), sizeof(info->bus_info));
1604 info->n_stats = ARRAY_SIZE(mtk_ethtool_stats);
1607 static u32 mtk_get_msglevel(struct net_device *dev)
1609 struct mtk_mac *mac = netdev_priv(dev);
1611 return mac->hw->msg_enable;
1614 static void mtk_set_msglevel(struct net_device *dev, u32 value)
1616 struct mtk_mac *mac = netdev_priv(dev);
1618 mac->hw->msg_enable = value;
1621 static int mtk_nway_reset(struct net_device *dev)
1623 struct mtk_mac *mac = netdev_priv(dev);
1625 return genphy_restart_aneg(mac->phy_dev);
1628 static u32 mtk_get_link(struct net_device *dev)
1630 struct mtk_mac *mac = netdev_priv(dev);
1633 err = genphy_update_link(mac->phy_dev);
1635 return ethtool_op_get_link(dev);
1637 return mac->phy_dev->link;
1640 static void mtk_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1644 switch (stringset) {
1646 for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) {
1647 memcpy(data, mtk_ethtool_stats[i].str, ETH_GSTRING_LEN);
1648 data += ETH_GSTRING_LEN;
1654 static int mtk_get_sset_count(struct net_device *dev, int sset)
1658 return ARRAY_SIZE(mtk_ethtool_stats);
1664 static void mtk_get_ethtool_stats(struct net_device *dev,
1665 struct ethtool_stats *stats, u64 *data)
1667 struct mtk_mac *mac = netdev_priv(dev);
1668 struct mtk_hw_stats *hwstats = mac->hw_stats;
1669 u64 *data_src, *data_dst;
1673 if (netif_running(dev) && netif_device_present(dev)) {
1674 if (spin_trylock(&hwstats->stats_lock)) {
1675 mtk_stats_update_mac(mac);
1676 spin_unlock(&hwstats->stats_lock);
1681 data_src = (u64*)hwstats;
1683 start = u64_stats_fetch_begin_irq(&hwstats->syncp);
1685 for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++)
1686 *data_dst++ = *(data_src + mtk_ethtool_stats[i].offset);
1687 } while (u64_stats_fetch_retry_irq(&hwstats->syncp, start));
1690 static struct ethtool_ops mtk_ethtool_ops = {
1691 .get_settings = mtk_get_settings,
1692 .set_settings = mtk_set_settings,
1693 .get_drvinfo = mtk_get_drvinfo,
1694 .get_msglevel = mtk_get_msglevel,
1695 .set_msglevel = mtk_set_msglevel,
1696 .nway_reset = mtk_nway_reset,
1697 .get_link = mtk_get_link,
1698 .get_strings = mtk_get_strings,
1699 .get_sset_count = mtk_get_sset_count,
1700 .get_ethtool_stats = mtk_get_ethtool_stats,
1703 static const struct net_device_ops mtk_netdev_ops = {
1704 .ndo_init = mtk_init,
1705 .ndo_uninit = mtk_uninit,
1706 .ndo_open = mtk_open,
1707 .ndo_stop = mtk_stop,
1708 .ndo_start_xmit = mtk_start_xmit,
1709 .ndo_set_mac_address = mtk_set_mac_address,
1710 .ndo_validate_addr = eth_validate_addr,
1711 .ndo_do_ioctl = mtk_do_ioctl,
1712 .ndo_change_mtu = eth_change_mtu,
1713 .ndo_tx_timeout = mtk_tx_timeout,
1714 .ndo_get_stats64 = mtk_get_stats64,
1715 #ifdef CONFIG_NET_POLL_CONTROLLER
1716 .ndo_poll_controller = mtk_poll_controller,
1720 static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
1722 struct mtk_mac *mac;
1723 const __be32 *_id = of_get_property(np, "reg", NULL);
1727 dev_err(eth->dev, "missing mac id\n");
1731 id = be32_to_cpup(_id);
1732 if (id >= MTK_MAC_COUNT) {
1733 dev_err(eth->dev, "%d is not a valid mac id\n", id);
1737 if (eth->netdev[id]) {
1738 dev_err(eth->dev, "duplicate mac id found: %d\n", id);
1742 eth->netdev[id] = alloc_etherdev(sizeof(*mac));
1743 if (!eth->netdev[id]) {
1744 dev_err(eth->dev, "alloc_etherdev failed\n");
1747 mac = netdev_priv(eth->netdev[id]);
1753 mac->hw_stats = devm_kzalloc(eth->dev,
1754 sizeof(*mac->hw_stats),
1756 if (!mac->hw_stats) {
1757 dev_err(eth->dev, "failed to allocate counter memory\n");
1761 spin_lock_init(&mac->hw_stats->stats_lock);
1762 u64_stats_init(&mac->hw_stats->syncp);
1763 mac->hw_stats->reg_offset = id * MTK_STAT_OFFSET;
1765 SET_NETDEV_DEV(eth->netdev[id], eth->dev);
1766 eth->netdev[id]->watchdog_timeo = 5 * HZ;
1767 eth->netdev[id]->netdev_ops = &mtk_netdev_ops;
1768 eth->netdev[id]->base_addr = (unsigned long)eth->base;
1769 eth->netdev[id]->vlan_features = MTK_HW_FEATURES &
1770 ~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX);
1771 eth->netdev[id]->features |= MTK_HW_FEATURES;
1772 eth->netdev[id]->ethtool_ops = &mtk_ethtool_ops;
1774 err = register_netdev(eth->netdev[id]);
1776 dev_err(eth->dev, "error bringing up device\n");
1779 eth->netdev[id]->irq = eth->irq[0];
1780 netif_info(eth, probe, eth->netdev[id],
1781 "mediatek frame engine at 0x%08lx, irq %d\n",
1782 eth->netdev[id]->base_addr, eth->irq[0]);
1787 free_netdev(eth->netdev[id]);
1791 static int mtk_probe(struct platform_device *pdev)
1793 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1794 struct device_node *mac_np;
1795 const struct of_device_id *match;
1796 struct mtk_soc_data *soc;
1797 struct mtk_eth *eth;
1801 match = of_match_device(of_mtk_match, &pdev->dev);
1802 soc = (struct mtk_soc_data *)match->data;
1804 eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL);
1808 eth->dev = &pdev->dev;
1809 eth->base = devm_ioremap_resource(&pdev->dev, res);
1810 if (IS_ERR(eth->base))
1811 return PTR_ERR(eth->base);
1813 spin_lock_init(ð->page_lock);
1814 spin_lock_init(ð->irq_lock);
1816 eth->ethsys = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
1818 if (IS_ERR(eth->ethsys)) {
1819 dev_err(&pdev->dev, "no ethsys regmap found\n");
1820 return PTR_ERR(eth->ethsys);
1823 eth->pctl = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
1825 if (IS_ERR(eth->pctl)) {
1826 dev_err(&pdev->dev, "no pctl regmap found\n");
1827 return PTR_ERR(eth->pctl);
1830 eth->rstc = devm_reset_control_get(&pdev->dev, "eth");
1831 if (IS_ERR(eth->rstc)) {
1832 dev_err(&pdev->dev, "no eth reset found\n");
1833 return PTR_ERR(eth->rstc);
1836 for (i = 0; i < 3; i++) {
1837 eth->irq[i] = platform_get_irq(pdev, i);
1838 if (eth->irq[i] < 0) {
1839 dev_err(&pdev->dev, "no IRQ%d resource found\n", i);
1843 for (i = 0; i < ARRAY_SIZE(eth->clks); i++) {
1844 eth->clks[i] = devm_clk_get(eth->dev,
1845 mtk_clks_source_name[i]);
1846 if (IS_ERR(eth->clks[i])) {
1847 if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER)
1848 return -EPROBE_DEFER;
1853 clk_prepare_enable(eth->clks[MTK_CLK_ETHIF]);
1854 clk_prepare_enable(eth->clks[MTK_CLK_ESW]);
1855 clk_prepare_enable(eth->clks[MTK_CLK_GP1]);
1856 clk_prepare_enable(eth->clks[MTK_CLK_GP2]);
1858 eth->msg_enable = netif_msg_init(mtk_msg_level, MTK_DEFAULT_MSG_ENABLE);
1859 INIT_WORK(ð->pending_work, mtk_pending_work);
1861 err = mtk_hw_init(eth);
1865 for_each_child_of_node(pdev->dev.of_node, mac_np) {
1866 if (!of_device_is_compatible(mac_np,
1867 "mediatek,eth-mac"))
1870 if (!of_device_is_available(mac_np))
1873 err = mtk_add_mac(eth, mac_np);
1878 /* we run 2 devices on the same DMA ring so we need a dummy device
1881 init_dummy_netdev(ð->dummy_dev);
1882 netif_napi_add(ð->dummy_dev, ð->tx_napi, mtk_napi_tx,
1884 netif_napi_add(ð->dummy_dev, ð->rx_napi, mtk_napi_rx,
1887 platform_set_drvdata(pdev, eth);
1896 static int mtk_remove(struct platform_device *pdev)
1898 struct mtk_eth *eth = platform_get_drvdata(pdev);
1901 /* stop all devices to make sure that dma is properly shut down */
1902 for (i = 0; i < MTK_MAC_COUNT; i++) {
1903 if (!eth->netdev[i])
1905 mtk_stop(eth->netdev[i]);
1908 clk_disable_unprepare(eth->clks[MTK_CLK_ETHIF]);
1909 clk_disable_unprepare(eth->clks[MTK_CLK_ESW]);
1910 clk_disable_unprepare(eth->clks[MTK_CLK_GP1]);
1911 clk_disable_unprepare(eth->clks[MTK_CLK_GP2]);
1913 netif_napi_del(ð->tx_napi);
1914 netif_napi_del(ð->rx_napi);
1916 mtk_mdio_cleanup(eth);
1917 platform_set_drvdata(pdev, NULL);
1922 const struct of_device_id of_mtk_match[] = {
1923 { .compatible = "mediatek,mt7623-eth" },
1926 MODULE_DEVICE_TABLE(of, of_mtk_match);
1928 static struct platform_driver mtk_driver = {
1930 .remove = mtk_remove,
1932 .name = "mtk_soc_eth",
1933 .of_match_table = of_mtk_match,
1937 module_platform_driver(mtk_driver);
1939 MODULE_LICENSE("GPL");
1940 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
1941 MODULE_DESCRIPTION("Ethernet driver for MediaTek SoC");