Commit | Line | Data |
---|---|---|
656e7052 JC |
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 | |
4 | * | |
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. | |
9 | * | |
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> | |
13 | */ | |
14 | ||
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> | |
24 | ||
25 | #include "mtk_eth_soc.h" | |
26 | ||
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)"); | |
30 | ||
31 | #define MTK_ETHTOOL_STAT(x) { #x, \ | |
32 | offsetof(struct mtk_hw_stats, x) / sizeof(u64) } | |
33 | ||
34 | /* strings used by ethtool */ | |
35 | static const struct mtk_ethtool_stats { | |
36 | char str[ETH_GSTRING_LEN]; | |
37 | u32 offset; | |
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), | |
51 | }; | |
52 | ||
53 | void mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg) | |
54 | { | |
55 | __raw_writel(val, eth->base + reg); | |
56 | } | |
57 | ||
58 | u32 mtk_r32(struct mtk_eth *eth, unsigned reg) | |
59 | { | |
60 | return __raw_readl(eth->base + reg); | |
61 | } | |
62 | ||
63 | static int mtk_mdio_busy_wait(struct mtk_eth *eth) | |
64 | { | |
65 | unsigned long t_start = jiffies; | |
66 | ||
67 | while (1) { | |
68 | if (!(mtk_r32(eth, MTK_PHY_IAC) & PHY_IAC_ACCESS)) | |
69 | return 0; | |
70 | if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT)) | |
71 | break; | |
72 | usleep_range(10, 20); | |
73 | } | |
74 | ||
75 | dev_err(eth->dev, "mdio: MDIO timeout\n"); | |
76 | return -1; | |
77 | } | |
78 | ||
379672de WY |
79 | static u32 _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, |
80 | u32 phy_register, u32 write_data) | |
656e7052 JC |
81 | { |
82 | if (mtk_mdio_busy_wait(eth)) | |
83 | return -1; | |
84 | ||
85 | write_data &= 0xffff; | |
86 | ||
87 | mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE | | |
88 | (phy_register << PHY_IAC_REG_SHIFT) | | |
89 | (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data, | |
90 | MTK_PHY_IAC); | |
91 | ||
92 | if (mtk_mdio_busy_wait(eth)) | |
93 | return -1; | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
379672de | 98 | static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg) |
656e7052 JC |
99 | { |
100 | u32 d; | |
101 | ||
102 | if (mtk_mdio_busy_wait(eth)) | |
103 | return 0xffff; | |
104 | ||
105 | mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ | | |
106 | (phy_reg << PHY_IAC_REG_SHIFT) | | |
107 | (phy_addr << PHY_IAC_ADDR_SHIFT), | |
108 | MTK_PHY_IAC); | |
109 | ||
110 | if (mtk_mdio_busy_wait(eth)) | |
111 | return 0xffff; | |
112 | ||
113 | d = mtk_r32(eth, MTK_PHY_IAC) & 0xffff; | |
114 | ||
115 | return d; | |
116 | } | |
117 | ||
118 | static int mtk_mdio_write(struct mii_bus *bus, int phy_addr, | |
119 | int phy_reg, u16 val) | |
120 | { | |
121 | struct mtk_eth *eth = bus->priv; | |
122 | ||
123 | return _mtk_mdio_write(eth, phy_addr, phy_reg, val); | |
124 | } | |
125 | ||
126 | static int mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg) | |
127 | { | |
128 | struct mtk_eth *eth = bus->priv; | |
129 | ||
130 | return _mtk_mdio_read(eth, phy_addr, phy_reg); | |
131 | } | |
132 | ||
133 | static void mtk_phy_link_adjust(struct net_device *dev) | |
134 | { | |
135 | struct mtk_mac *mac = netdev_priv(dev); | |
08ef55c6 JC |
136 | u16 lcl_adv = 0, rmt_adv = 0; |
137 | u8 flowctrl; | |
656e7052 JC |
138 | u32 mcr = MAC_MCR_MAX_RX_1536 | MAC_MCR_IPG_CFG | |
139 | MAC_MCR_FORCE_MODE | MAC_MCR_TX_EN | | |
140 | MAC_MCR_RX_EN | MAC_MCR_BACKOFF_EN | | |
141 | MAC_MCR_BACKPR_EN; | |
142 | ||
143 | switch (mac->phy_dev->speed) { | |
144 | case SPEED_1000: | |
145 | mcr |= MAC_MCR_SPEED_1000; | |
146 | break; | |
147 | case SPEED_100: | |
148 | mcr |= MAC_MCR_SPEED_100; | |
149 | break; | |
150 | }; | |
151 | ||
152 | if (mac->phy_dev->link) | |
153 | mcr |= MAC_MCR_FORCE_LINK; | |
154 | ||
08ef55c6 | 155 | if (mac->phy_dev->duplex) { |
656e7052 JC |
156 | mcr |= MAC_MCR_FORCE_DPX; |
157 | ||
08ef55c6 JC |
158 | if (mac->phy_dev->pause) |
159 | rmt_adv = LPA_PAUSE_CAP; | |
160 | if (mac->phy_dev->asym_pause) | |
161 | rmt_adv |= LPA_PAUSE_ASYM; | |
162 | ||
163 | if (mac->phy_dev->advertising & ADVERTISED_Pause) | |
164 | lcl_adv |= ADVERTISE_PAUSE_CAP; | |
165 | if (mac->phy_dev->advertising & ADVERTISED_Asym_Pause) | |
166 | lcl_adv |= ADVERTISE_PAUSE_ASYM; | |
167 | ||
168 | flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv); | |
169 | ||
170 | if (flowctrl & FLOW_CTRL_TX) | |
171 | mcr |= MAC_MCR_FORCE_TX_FC; | |
172 | if (flowctrl & FLOW_CTRL_RX) | |
173 | mcr |= MAC_MCR_FORCE_RX_FC; | |
174 | ||
175 | netif_dbg(mac->hw, link, dev, "rx pause %s, tx pause %s\n", | |
176 | flowctrl & FLOW_CTRL_RX ? "enabled" : "disabled", | |
177 | flowctrl & FLOW_CTRL_TX ? "enabled" : "disabled"); | |
178 | } | |
656e7052 JC |
179 | |
180 | mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id)); | |
181 | ||
182 | if (mac->phy_dev->link) | |
183 | netif_carrier_on(dev); | |
184 | else | |
185 | netif_carrier_off(dev); | |
186 | } | |
187 | ||
188 | static int mtk_phy_connect_node(struct mtk_eth *eth, struct mtk_mac *mac, | |
189 | struct device_node *phy_node) | |
190 | { | |
191 | const __be32 *_addr = NULL; | |
192 | struct phy_device *phydev; | |
193 | int phy_mode, addr; | |
194 | ||
195 | _addr = of_get_property(phy_node, "reg", NULL); | |
196 | ||
197 | if (!_addr || (be32_to_cpu(*_addr) >= 0x20)) { | |
198 | pr_err("%s: invalid phy address\n", phy_node->name); | |
199 | return -EINVAL; | |
200 | } | |
201 | addr = be32_to_cpu(*_addr); | |
202 | phy_mode = of_get_phy_mode(phy_node); | |
203 | if (phy_mode < 0) { | |
204 | dev_err(eth->dev, "incorrect phy-mode %d\n", phy_mode); | |
205 | return -EINVAL; | |
206 | } | |
207 | ||
208 | phydev = of_phy_connect(eth->netdev[mac->id], phy_node, | |
209 | mtk_phy_link_adjust, 0, phy_mode); | |
977bc20c | 210 | if (!phydev) { |
656e7052 | 211 | dev_err(eth->dev, "could not connect to PHY\n"); |
977bc20c | 212 | return -ENODEV; |
656e7052 JC |
213 | } |
214 | ||
215 | dev_info(eth->dev, | |
216 | "connected mac %d to PHY at %s [uid=%08x, driver=%s]\n", | |
217 | mac->id, phydev_name(phydev), phydev->phy_id, | |
218 | phydev->drv->name); | |
219 | ||
220 | mac->phy_dev = phydev; | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static int mtk_phy_connect(struct mtk_mac *mac) | |
226 | { | |
227 | struct mtk_eth *eth = mac->hw; | |
228 | struct device_node *np; | |
229 | u32 val, ge_mode; | |
230 | ||
231 | np = of_parse_phandle(mac->of_node, "phy-handle", 0); | |
0c72c50f JC |
232 | if (!np && of_phy_is_fixed_link(mac->of_node)) |
233 | if (!of_phy_register_fixed_link(mac->of_node)) | |
234 | np = of_node_get(mac->of_node); | |
656e7052 JC |
235 | if (!np) |
236 | return -ENODEV; | |
237 | ||
238 | switch (of_get_phy_mode(np)) { | |
37920fce JC |
239 | case PHY_INTERFACE_MODE_RGMII_TXID: |
240 | case PHY_INTERFACE_MODE_RGMII_RXID: | |
241 | case PHY_INTERFACE_MODE_RGMII_ID: | |
656e7052 JC |
242 | case PHY_INTERFACE_MODE_RGMII: |
243 | ge_mode = 0; | |
244 | break; | |
245 | case PHY_INTERFACE_MODE_MII: | |
246 | ge_mode = 1; | |
247 | break; | |
8ca7f4fe | 248 | case PHY_INTERFACE_MODE_REVMII: |
656e7052 JC |
249 | ge_mode = 2; |
250 | break; | |
8ca7f4fe | 251 | case PHY_INTERFACE_MODE_RMII: |
252 | if (!mac->id) | |
253 | goto err_phy; | |
254 | ge_mode = 3; | |
255 | break; | |
656e7052 | 256 | default: |
8ca7f4fe | 257 | goto err_phy; |
656e7052 JC |
258 | } |
259 | ||
260 | /* put the gmac into the right mode */ | |
261 | regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); | |
262 | val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, mac->id); | |
263 | val |= SYSCFG0_GE_MODE(ge_mode, mac->id); | |
264 | regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); | |
265 | ||
266 | mtk_phy_connect_node(eth, mac, np); | |
267 | mac->phy_dev->autoneg = AUTONEG_ENABLE; | |
268 | mac->phy_dev->speed = 0; | |
269 | mac->phy_dev->duplex = 0; | |
b2025c7c | 270 | |
271 | if (of_phy_is_fixed_link(mac->of_node)) | |
272 | mac->phy_dev->supported |= | |
273 | SUPPORTED_Pause | SUPPORTED_Asym_Pause; | |
274 | ||
08ef55c6 JC |
275 | mac->phy_dev->supported &= PHY_GBIT_FEATURES | SUPPORTED_Pause | |
276 | SUPPORTED_Asym_Pause; | |
656e7052 JC |
277 | mac->phy_dev->advertising = mac->phy_dev->supported | |
278 | ADVERTISED_Autoneg; | |
279 | phy_start_aneg(mac->phy_dev); | |
280 | ||
e8c2993a | 281 | of_node_put(np); |
282 | ||
656e7052 | 283 | return 0; |
8ca7f4fe | 284 | |
285 | err_phy: | |
286 | of_node_put(np); | |
287 | dev_err(eth->dev, "invalid phy_mode\n"); | |
288 | return -EINVAL; | |
656e7052 JC |
289 | } |
290 | ||
291 | static int mtk_mdio_init(struct mtk_eth *eth) | |
292 | { | |
293 | struct device_node *mii_np; | |
294 | int err; | |
295 | ||
296 | mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus"); | |
297 | if (!mii_np) { | |
298 | dev_err(eth->dev, "no %s child node found", "mdio-bus"); | |
299 | return -ENODEV; | |
300 | } | |
301 | ||
302 | if (!of_device_is_available(mii_np)) { | |
303 | err = 0; | |
304 | goto err_put_node; | |
305 | } | |
306 | ||
307 | eth->mii_bus = mdiobus_alloc(); | |
308 | if (!eth->mii_bus) { | |
309 | err = -ENOMEM; | |
310 | goto err_put_node; | |
311 | } | |
312 | ||
313 | eth->mii_bus->name = "mdio"; | |
314 | eth->mii_bus->read = mtk_mdio_read; | |
315 | eth->mii_bus->write = mtk_mdio_write; | |
316 | eth->mii_bus->priv = eth; | |
317 | eth->mii_bus->parent = eth->dev; | |
318 | ||
319 | snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%s", mii_np->name); | |
320 | err = of_mdiobus_register(eth->mii_bus, mii_np); | |
321 | if (err) | |
322 | goto err_free_bus; | |
323 | ||
324 | return 0; | |
325 | ||
326 | err_free_bus: | |
207bdf18 | 327 | mdiobus_free(eth->mii_bus); |
656e7052 JC |
328 | |
329 | err_put_node: | |
330 | of_node_put(mii_np); | |
331 | eth->mii_bus = NULL; | |
332 | return err; | |
333 | } | |
334 | ||
335 | static void mtk_mdio_cleanup(struct mtk_eth *eth) | |
336 | { | |
337 | if (!eth->mii_bus) | |
338 | return; | |
339 | ||
340 | mdiobus_unregister(eth->mii_bus); | |
341 | of_node_put(eth->mii_bus->dev.of_node); | |
207bdf18 | 342 | mdiobus_free(eth->mii_bus); |
656e7052 JC |
343 | } |
344 | ||
345 | static inline void mtk_irq_disable(struct mtk_eth *eth, u32 mask) | |
346 | { | |
7bc9ccec | 347 | unsigned long flags; |
656e7052 JC |
348 | u32 val; |
349 | ||
7bc9ccec | 350 | spin_lock_irqsave(ð->irq_lock, flags); |
656e7052 JC |
351 | val = mtk_r32(eth, MTK_QDMA_INT_MASK); |
352 | mtk_w32(eth, val & ~mask, MTK_QDMA_INT_MASK); | |
7bc9ccec | 353 | spin_unlock_irqrestore(ð->irq_lock, flags); |
656e7052 JC |
354 | } |
355 | ||
356 | static inline void mtk_irq_enable(struct mtk_eth *eth, u32 mask) | |
357 | { | |
7bc9ccec | 358 | unsigned long flags; |
656e7052 JC |
359 | u32 val; |
360 | ||
7bc9ccec | 361 | spin_lock_irqsave(ð->irq_lock, flags); |
656e7052 JC |
362 | val = mtk_r32(eth, MTK_QDMA_INT_MASK); |
363 | mtk_w32(eth, val | mask, MTK_QDMA_INT_MASK); | |
7bc9ccec | 364 | spin_unlock_irqrestore(ð->irq_lock, flags); |
656e7052 JC |
365 | } |
366 | ||
367 | static int mtk_set_mac_address(struct net_device *dev, void *p) | |
368 | { | |
369 | int ret = eth_mac_addr(dev, p); | |
370 | struct mtk_mac *mac = netdev_priv(dev); | |
371 | const char *macaddr = dev->dev_addr; | |
372 | unsigned long flags; | |
373 | ||
374 | if (ret) | |
375 | return ret; | |
376 | ||
377 | spin_lock_irqsave(&mac->hw->page_lock, flags); | |
378 | mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1], | |
379 | MTK_GDMA_MAC_ADRH(mac->id)); | |
380 | mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) | | |
381 | (macaddr[4] << 8) | macaddr[5], | |
382 | MTK_GDMA_MAC_ADRL(mac->id)); | |
383 | spin_unlock_irqrestore(&mac->hw->page_lock, flags); | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | void mtk_stats_update_mac(struct mtk_mac *mac) | |
389 | { | |
390 | struct mtk_hw_stats *hw_stats = mac->hw_stats; | |
391 | unsigned int base = MTK_GDM1_TX_GBCNT; | |
392 | u64 stats; | |
393 | ||
394 | base += hw_stats->reg_offset; | |
395 | ||
396 | u64_stats_update_begin(&hw_stats->syncp); | |
397 | ||
398 | hw_stats->rx_bytes += mtk_r32(mac->hw, base); | |
399 | stats = mtk_r32(mac->hw, base + 0x04); | |
400 | if (stats) | |
401 | hw_stats->rx_bytes += (stats << 32); | |
402 | hw_stats->rx_packets += mtk_r32(mac->hw, base + 0x08); | |
403 | hw_stats->rx_overflow += mtk_r32(mac->hw, base + 0x10); | |
404 | hw_stats->rx_fcs_errors += mtk_r32(mac->hw, base + 0x14); | |
405 | hw_stats->rx_short_errors += mtk_r32(mac->hw, base + 0x18); | |
406 | hw_stats->rx_long_errors += mtk_r32(mac->hw, base + 0x1c); | |
407 | hw_stats->rx_checksum_errors += mtk_r32(mac->hw, base + 0x20); | |
408 | hw_stats->rx_flow_control_packets += | |
409 | mtk_r32(mac->hw, base + 0x24); | |
410 | hw_stats->tx_skip += mtk_r32(mac->hw, base + 0x28); | |
411 | hw_stats->tx_collisions += mtk_r32(mac->hw, base + 0x2c); | |
412 | hw_stats->tx_bytes += mtk_r32(mac->hw, base + 0x30); | |
413 | stats = mtk_r32(mac->hw, base + 0x34); | |
414 | if (stats) | |
415 | hw_stats->tx_bytes += (stats << 32); | |
416 | hw_stats->tx_packets += mtk_r32(mac->hw, base + 0x38); | |
417 | u64_stats_update_end(&hw_stats->syncp); | |
418 | } | |
419 | ||
420 | static void mtk_stats_update(struct mtk_eth *eth) | |
421 | { | |
422 | int i; | |
423 | ||
424 | for (i = 0; i < MTK_MAC_COUNT; i++) { | |
425 | if (!eth->mac[i] || !eth->mac[i]->hw_stats) | |
426 | continue; | |
427 | if (spin_trylock(ð->mac[i]->hw_stats->stats_lock)) { | |
428 | mtk_stats_update_mac(eth->mac[i]); | |
429 | spin_unlock(ð->mac[i]->hw_stats->stats_lock); | |
430 | } | |
431 | } | |
432 | } | |
433 | ||
434 | static struct rtnl_link_stats64 *mtk_get_stats64(struct net_device *dev, | |
435 | struct rtnl_link_stats64 *storage) | |
436 | { | |
437 | struct mtk_mac *mac = netdev_priv(dev); | |
438 | struct mtk_hw_stats *hw_stats = mac->hw_stats; | |
439 | unsigned int start; | |
440 | ||
441 | if (netif_running(dev) && netif_device_present(dev)) { | |
442 | if (spin_trylock(&hw_stats->stats_lock)) { | |
443 | mtk_stats_update_mac(mac); | |
444 | spin_unlock(&hw_stats->stats_lock); | |
445 | } | |
446 | } | |
447 | ||
448 | do { | |
449 | start = u64_stats_fetch_begin_irq(&hw_stats->syncp); | |
450 | storage->rx_packets = hw_stats->rx_packets; | |
451 | storage->tx_packets = hw_stats->tx_packets; | |
452 | storage->rx_bytes = hw_stats->rx_bytes; | |
453 | storage->tx_bytes = hw_stats->tx_bytes; | |
454 | storage->collisions = hw_stats->tx_collisions; | |
455 | storage->rx_length_errors = hw_stats->rx_short_errors + | |
456 | hw_stats->rx_long_errors; | |
457 | storage->rx_over_errors = hw_stats->rx_overflow; | |
458 | storage->rx_crc_errors = hw_stats->rx_fcs_errors; | |
459 | storage->rx_errors = hw_stats->rx_checksum_errors; | |
460 | storage->tx_aborted_errors = hw_stats->tx_skip; | |
461 | } while (u64_stats_fetch_retry_irq(&hw_stats->syncp, start)); | |
462 | ||
463 | storage->tx_errors = dev->stats.tx_errors; | |
464 | storage->rx_dropped = dev->stats.rx_dropped; | |
465 | storage->tx_dropped = dev->stats.tx_dropped; | |
466 | ||
467 | return storage; | |
468 | } | |
469 | ||
470 | static inline int mtk_max_frag_size(int mtu) | |
471 | { | |
472 | /* make sure buf_size will be at least MTK_MAX_RX_LENGTH */ | |
473 | if (mtu + MTK_RX_ETH_HLEN < MTK_MAX_RX_LENGTH) | |
474 | mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN; | |
475 | ||
476 | return SKB_DATA_ALIGN(MTK_RX_HLEN + mtu) + | |
477 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
478 | } | |
479 | ||
480 | static inline int mtk_max_buf_size(int frag_size) | |
481 | { | |
482 | int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN - | |
483 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
484 | ||
485 | WARN_ON(buf_size < MTK_MAX_RX_LENGTH); | |
486 | ||
487 | return buf_size; | |
488 | } | |
489 | ||
490 | static inline void mtk_rx_get_desc(struct mtk_rx_dma *rxd, | |
491 | struct mtk_rx_dma *dma_rxd) | |
492 | { | |
493 | rxd->rxd1 = READ_ONCE(dma_rxd->rxd1); | |
494 | rxd->rxd2 = READ_ONCE(dma_rxd->rxd2); | |
495 | rxd->rxd3 = READ_ONCE(dma_rxd->rxd3); | |
496 | rxd->rxd4 = READ_ONCE(dma_rxd->rxd4); | |
497 | } | |
498 | ||
499 | /* the qdma core needs scratch memory to be setup */ | |
500 | static int mtk_init_fq_dma(struct mtk_eth *eth) | |
501 | { | |
605e4fe4 | 502 | dma_addr_t phy_ring_tail; |
656e7052 JC |
503 | int cnt = MTK_DMA_SIZE; |
504 | dma_addr_t dma_addr; | |
505 | int i; | |
506 | ||
507 | eth->scratch_ring = dma_alloc_coherent(eth->dev, | |
508 | cnt * sizeof(struct mtk_tx_dma), | |
605e4fe4 | 509 | ð->phy_scratch_ring, |
656e7052 JC |
510 | GFP_ATOMIC | __GFP_ZERO); |
511 | if (unlikely(!eth->scratch_ring)) | |
512 | return -ENOMEM; | |
513 | ||
514 | eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE, | |
515 | GFP_KERNEL); | |
562c5a70 JC |
516 | if (unlikely(!eth->scratch_head)) |
517 | return -ENOMEM; | |
518 | ||
656e7052 JC |
519 | dma_addr = dma_map_single(eth->dev, |
520 | eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE, | |
521 | DMA_FROM_DEVICE); | |
522 | if (unlikely(dma_mapping_error(eth->dev, dma_addr))) | |
523 | return -ENOMEM; | |
524 | ||
525 | memset(eth->scratch_ring, 0x0, sizeof(struct mtk_tx_dma) * cnt); | |
605e4fe4 | 526 | phy_ring_tail = eth->phy_scratch_ring + |
656e7052 JC |
527 | (sizeof(struct mtk_tx_dma) * (cnt - 1)); |
528 | ||
529 | for (i = 0; i < cnt; i++) { | |
530 | eth->scratch_ring[i].txd1 = | |
531 | (dma_addr + (i * MTK_QDMA_PAGE_SIZE)); | |
532 | if (i < cnt - 1) | |
605e4fe4 | 533 | eth->scratch_ring[i].txd2 = (eth->phy_scratch_ring + |
656e7052 JC |
534 | ((i + 1) * sizeof(struct mtk_tx_dma))); |
535 | eth->scratch_ring[i].txd3 = TX_DMA_SDL(MTK_QDMA_PAGE_SIZE); | |
536 | } | |
537 | ||
605e4fe4 | 538 | mtk_w32(eth, eth->phy_scratch_ring, MTK_QDMA_FQ_HEAD); |
656e7052 JC |
539 | mtk_w32(eth, phy_ring_tail, MTK_QDMA_FQ_TAIL); |
540 | mtk_w32(eth, (cnt << 16) | cnt, MTK_QDMA_FQ_CNT); | |
541 | mtk_w32(eth, MTK_QDMA_PAGE_SIZE << 16, MTK_QDMA_FQ_BLEN); | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | static inline void *mtk_qdma_phys_to_virt(struct mtk_tx_ring *ring, u32 desc) | |
547 | { | |
548 | void *ret = ring->dma; | |
549 | ||
550 | return ret + (desc - ring->phys); | |
551 | } | |
552 | ||
553 | static inline struct mtk_tx_buf *mtk_desc_to_tx_buf(struct mtk_tx_ring *ring, | |
554 | struct mtk_tx_dma *txd) | |
555 | { | |
556 | int idx = txd - ring->dma; | |
557 | ||
558 | return &ring->buf[idx]; | |
559 | } | |
560 | ||
55a4e778 | 561 | static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf) |
656e7052 JC |
562 | { |
563 | if (tx_buf->flags & MTK_TX_FLAGS_SINGLE0) { | |
55a4e778 | 564 | dma_unmap_single(eth->dev, |
656e7052 JC |
565 | dma_unmap_addr(tx_buf, dma_addr0), |
566 | dma_unmap_len(tx_buf, dma_len0), | |
567 | DMA_TO_DEVICE); | |
568 | } else if (tx_buf->flags & MTK_TX_FLAGS_PAGE0) { | |
55a4e778 | 569 | dma_unmap_page(eth->dev, |
656e7052 JC |
570 | dma_unmap_addr(tx_buf, dma_addr0), |
571 | dma_unmap_len(tx_buf, dma_len0), | |
572 | DMA_TO_DEVICE); | |
573 | } | |
574 | tx_buf->flags = 0; | |
575 | if (tx_buf->skb && | |
576 | (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC)) | |
577 | dev_kfree_skb_any(tx_buf->skb); | |
578 | tx_buf->skb = NULL; | |
579 | } | |
580 | ||
581 | static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev, | |
582 | int tx_num, struct mtk_tx_ring *ring, bool gso) | |
583 | { | |
584 | struct mtk_mac *mac = netdev_priv(dev); | |
585 | struct mtk_eth *eth = mac->hw; | |
586 | struct mtk_tx_dma *itxd, *txd; | |
587 | struct mtk_tx_buf *tx_buf; | |
656e7052 JC |
588 | dma_addr_t mapped_addr; |
589 | unsigned int nr_frags; | |
590 | int i, n_desc = 1; | |
591 | u32 txd4 = 0; | |
592 | ||
593 | itxd = ring->next_free; | |
594 | if (itxd == ring->last_free) | |
595 | return -ENOMEM; | |
596 | ||
597 | /* set the forward port */ | |
598 | txd4 |= (mac->id + 1) << TX_DMA_FPORT_SHIFT; | |
599 | ||
600 | tx_buf = mtk_desc_to_tx_buf(ring, itxd); | |
601 | memset(tx_buf, 0, sizeof(*tx_buf)); | |
602 | ||
603 | if (gso) | |
604 | txd4 |= TX_DMA_TSO; | |
605 | ||
606 | /* TX Checksum offload */ | |
607 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
608 | txd4 |= TX_DMA_CHKSUM; | |
609 | ||
610 | /* VLAN header offload */ | |
611 | if (skb_vlan_tag_present(skb)) | |
612 | txd4 |= TX_DMA_INS_VLAN | skb_vlan_tag_get(skb); | |
613 | ||
55a4e778 | 614 | mapped_addr = dma_map_single(eth->dev, skb->data, |
656e7052 | 615 | skb_headlen(skb), DMA_TO_DEVICE); |
55a4e778 | 616 | if (unlikely(dma_mapping_error(eth->dev, mapped_addr))) |
656e7052 JC |
617 | return -ENOMEM; |
618 | ||
656e7052 JC |
619 | WRITE_ONCE(itxd->txd1, mapped_addr); |
620 | tx_buf->flags |= MTK_TX_FLAGS_SINGLE0; | |
621 | dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); | |
622 | dma_unmap_len_set(tx_buf, dma_len0, skb_headlen(skb)); | |
623 | ||
624 | /* TX SG offload */ | |
625 | txd = itxd; | |
626 | nr_frags = skb_shinfo(skb)->nr_frags; | |
627 | for (i = 0; i < nr_frags; i++) { | |
628 | struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; | |
629 | unsigned int offset = 0; | |
630 | int frag_size = skb_frag_size(frag); | |
631 | ||
632 | while (frag_size) { | |
633 | bool last_frag = false; | |
634 | unsigned int frag_map_size; | |
635 | ||
636 | txd = mtk_qdma_phys_to_virt(ring, txd->txd2); | |
637 | if (txd == ring->last_free) | |
638 | goto err_dma; | |
639 | ||
640 | n_desc++; | |
641 | frag_map_size = min(frag_size, MTK_TX_DMA_BUF_LEN); | |
55a4e778 | 642 | mapped_addr = skb_frag_dma_map(eth->dev, frag, offset, |
656e7052 JC |
643 | frag_map_size, |
644 | DMA_TO_DEVICE); | |
55a4e778 | 645 | if (unlikely(dma_mapping_error(eth->dev, mapped_addr))) |
656e7052 JC |
646 | goto err_dma; |
647 | ||
648 | if (i == nr_frags - 1 && | |
649 | (frag_size - frag_map_size) == 0) | |
650 | last_frag = true; | |
651 | ||
652 | WRITE_ONCE(txd->txd1, mapped_addr); | |
653 | WRITE_ONCE(txd->txd3, (TX_DMA_SWC | | |
654 | TX_DMA_PLEN0(frag_map_size) | | |
369f0453 | 655 | last_frag * TX_DMA_LS0)); |
656e7052 JC |
656 | WRITE_ONCE(txd->txd4, 0); |
657 | ||
658 | tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC; | |
659 | tx_buf = mtk_desc_to_tx_buf(ring, txd); | |
660 | memset(tx_buf, 0, sizeof(*tx_buf)); | |
661 | ||
662 | tx_buf->flags |= MTK_TX_FLAGS_PAGE0; | |
663 | dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); | |
664 | dma_unmap_len_set(tx_buf, dma_len0, frag_map_size); | |
665 | frag_size -= frag_map_size; | |
666 | offset += frag_map_size; | |
667 | } | |
668 | } | |
669 | ||
670 | /* store skb to cleanup */ | |
671 | tx_buf->skb = skb; | |
672 | ||
673 | WRITE_ONCE(itxd->txd4, txd4); | |
674 | WRITE_ONCE(itxd->txd3, (TX_DMA_SWC | TX_DMA_PLEN0(skb_headlen(skb)) | | |
675 | (!nr_frags * TX_DMA_LS0))); | |
676 | ||
656e7052 JC |
677 | netdev_sent_queue(dev, skb->len); |
678 | skb_tx_timestamp(skb); | |
679 | ||
680 | ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2); | |
681 | atomic_sub(n_desc, &ring->free_count); | |
682 | ||
683 | /* make sure that all changes to the dma ring are flushed before we | |
684 | * continue | |
685 | */ | |
686 | wmb(); | |
687 | ||
688 | if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) || !skb->xmit_more) | |
689 | mtk_w32(eth, txd->txd2, MTK_QTX_CTX_PTR); | |
690 | ||
691 | return 0; | |
692 | ||
693 | err_dma: | |
694 | do { | |
2fae723c | 695 | tx_buf = mtk_desc_to_tx_buf(ring, itxd); |
656e7052 JC |
696 | |
697 | /* unmap dma */ | |
55a4e778 | 698 | mtk_tx_unmap(eth, tx_buf); |
656e7052 JC |
699 | |
700 | itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; | |
701 | itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2); | |
702 | } while (itxd != txd); | |
703 | ||
704 | return -ENOMEM; | |
705 | } | |
706 | ||
707 | static inline int mtk_cal_txd_req(struct sk_buff *skb) | |
708 | { | |
709 | int i, nfrags; | |
710 | struct skb_frag_struct *frag; | |
711 | ||
712 | nfrags = 1; | |
713 | if (skb_is_gso(skb)) { | |
714 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
715 | frag = &skb_shinfo(skb)->frags[i]; | |
716 | nfrags += DIV_ROUND_UP(frag->size, MTK_TX_DMA_BUF_LEN); | |
717 | } | |
718 | } else { | |
719 | nfrags += skb_shinfo(skb)->nr_frags; | |
720 | } | |
721 | ||
beeb4ca4 | 722 | return nfrags; |
656e7052 JC |
723 | } |
724 | ||
ad3cba98 JC |
725 | static int mtk_queue_stopped(struct mtk_eth *eth) |
726 | { | |
727 | int i; | |
728 | ||
729 | for (i = 0; i < MTK_MAC_COUNT; i++) { | |
730 | if (!eth->netdev[i]) | |
731 | continue; | |
732 | if (netif_queue_stopped(eth->netdev[i])) | |
733 | return 1; | |
734 | } | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
13c822f6 JC |
739 | static void mtk_wake_queue(struct mtk_eth *eth) |
740 | { | |
741 | int i; | |
742 | ||
743 | for (i = 0; i < MTK_MAC_COUNT; i++) { | |
744 | if (!eth->netdev[i]) | |
745 | continue; | |
746 | netif_wake_queue(eth->netdev[i]); | |
747 | } | |
748 | } | |
749 | ||
750 | static void mtk_stop_queue(struct mtk_eth *eth) | |
751 | { | |
752 | int i; | |
753 | ||
754 | for (i = 0; i < MTK_MAC_COUNT; i++) { | |
755 | if (!eth->netdev[i]) | |
756 | continue; | |
757 | netif_stop_queue(eth->netdev[i]); | |
758 | } | |
759 | } | |
760 | ||
656e7052 JC |
761 | static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev) |
762 | { | |
763 | struct mtk_mac *mac = netdev_priv(dev); | |
764 | struct mtk_eth *eth = mac->hw; | |
765 | struct mtk_tx_ring *ring = ð->tx_ring; | |
766 | struct net_device_stats *stats = &dev->stats; | |
34c2e4c9 | 767 | unsigned long flags; |
656e7052 JC |
768 | bool gso = false; |
769 | int tx_num; | |
770 | ||
34c2e4c9 JC |
771 | /* normally we can rely on the stack not calling this more than once, |
772 | * however we have 2 queues running on the same ring so we need to lock | |
773 | * the ring access | |
774 | */ | |
775 | spin_lock_irqsave(ð->page_lock, flags); | |
776 | ||
656e7052 JC |
777 | tx_num = mtk_cal_txd_req(skb); |
778 | if (unlikely(atomic_read(&ring->free_count) <= tx_num)) { | |
13c822f6 | 779 | mtk_stop_queue(eth); |
656e7052 JC |
780 | netif_err(eth, tx_queued, dev, |
781 | "Tx Ring full when queue awake!\n"); | |
34c2e4c9 | 782 | spin_unlock_irqrestore(ð->page_lock, flags); |
656e7052 JC |
783 | return NETDEV_TX_BUSY; |
784 | } | |
785 | ||
786 | /* TSO: fill MSS info in tcp checksum field */ | |
787 | if (skb_is_gso(skb)) { | |
788 | if (skb_cow_head(skb, 0)) { | |
789 | netif_warn(eth, tx_err, dev, | |
790 | "GSO expand head fail.\n"); | |
791 | goto drop; | |
792 | } | |
793 | ||
794 | if (skb_shinfo(skb)->gso_type & | |
795 | (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) { | |
796 | gso = true; | |
797 | tcp_hdr(skb)->check = htons(skb_shinfo(skb)->gso_size); | |
798 | } | |
799 | } | |
800 | ||
801 | if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0) | |
802 | goto drop; | |
803 | ||
82c6544d | 804 | if (unlikely(atomic_read(&ring->free_count) <= ring->thresh)) |
13c822f6 | 805 | mtk_stop_queue(eth); |
82c6544d | 806 | |
34c2e4c9 | 807 | spin_unlock_irqrestore(ð->page_lock, flags); |
656e7052 JC |
808 | |
809 | return NETDEV_TX_OK; | |
810 | ||
811 | drop: | |
34c2e4c9 | 812 | spin_unlock_irqrestore(ð->page_lock, flags); |
656e7052 JC |
813 | stats->tx_dropped++; |
814 | dev_kfree_skb(skb); | |
815 | return NETDEV_TX_OK; | |
816 | } | |
817 | ||
818 | static int mtk_poll_rx(struct napi_struct *napi, int budget, | |
eece71e8 | 819 | struct mtk_eth *eth) |
656e7052 JC |
820 | { |
821 | struct mtk_rx_ring *ring = ð->rx_ring; | |
822 | int idx = ring->calc_idx; | |
823 | struct sk_buff *skb; | |
824 | u8 *data, *new_data; | |
825 | struct mtk_rx_dma *rxd, trxd; | |
826 | int done = 0; | |
827 | ||
828 | while (done < budget) { | |
829 | struct net_device *netdev; | |
830 | unsigned int pktlen; | |
831 | dma_addr_t dma_addr; | |
832 | int mac = 0; | |
833 | ||
834 | idx = NEXT_RX_DESP_IDX(idx); | |
835 | rxd = &ring->dma[idx]; | |
836 | data = ring->data[idx]; | |
837 | ||
838 | mtk_rx_get_desc(&trxd, rxd); | |
839 | if (!(trxd.rxd2 & RX_DMA_DONE)) | |
840 | break; | |
841 | ||
842 | /* find out which mac the packet come from. values start at 1 */ | |
843 | mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) & | |
844 | RX_DMA_FPORT_MASK; | |
845 | mac--; | |
846 | ||
847 | netdev = eth->netdev[mac]; | |
848 | ||
849 | /* alloc new buffer */ | |
850 | new_data = napi_alloc_frag(ring->frag_size); | |
851 | if (unlikely(!new_data)) { | |
852 | netdev->stats.rx_dropped++; | |
853 | goto release_desc; | |
854 | } | |
55a4e778 | 855 | dma_addr = dma_map_single(eth->dev, |
656e7052 JC |
856 | new_data + NET_SKB_PAD, |
857 | ring->buf_size, | |
858 | DMA_FROM_DEVICE); | |
55a4e778 | 859 | if (unlikely(dma_mapping_error(eth->dev, dma_addr))) { |
656e7052 | 860 | skb_free_frag(new_data); |
94321a9f | 861 | netdev->stats.rx_dropped++; |
656e7052 JC |
862 | goto release_desc; |
863 | } | |
864 | ||
865 | /* receive data */ | |
866 | skb = build_skb(data, ring->frag_size); | |
867 | if (unlikely(!skb)) { | |
868 | put_page(virt_to_head_page(new_data)); | |
94321a9f | 869 | netdev->stats.rx_dropped++; |
656e7052 JC |
870 | goto release_desc; |
871 | } | |
872 | skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); | |
873 | ||
55a4e778 | 874 | dma_unmap_single(eth->dev, trxd.rxd1, |
656e7052 JC |
875 | ring->buf_size, DMA_FROM_DEVICE); |
876 | pktlen = RX_DMA_GET_PLEN0(trxd.rxd2); | |
877 | skb->dev = netdev; | |
878 | skb_put(skb, pktlen); | |
879 | if (trxd.rxd4 & RX_DMA_L4_VALID) | |
880 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
881 | else | |
882 | skb_checksum_none_assert(skb); | |
883 | skb->protocol = eth_type_trans(skb, netdev); | |
884 | ||
885 | if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX && | |
886 | RX_DMA_VID(trxd.rxd3)) | |
887 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
888 | RX_DMA_VID(trxd.rxd3)); | |
889 | napi_gro_receive(napi, skb); | |
890 | ||
891 | ring->data[idx] = new_data; | |
892 | rxd->rxd1 = (unsigned int)dma_addr; | |
893 | ||
894 | release_desc: | |
895 | rxd->rxd2 = RX_DMA_PLEN0(ring->buf_size); | |
896 | ||
897 | ring->calc_idx = idx; | |
898 | /* make sure that all changes to the dma ring are flushed before | |
899 | * we continue | |
900 | */ | |
901 | wmb(); | |
902 | mtk_w32(eth, ring->calc_idx, MTK_QRX_CRX_IDX0); | |
903 | done++; | |
904 | } | |
905 | ||
906 | if (done < budget) | |
eece71e8 | 907 | mtk_w32(eth, MTK_RX_DONE_INT, MTK_QMTK_INT_STATUS); |
656e7052 JC |
908 | |
909 | return done; | |
910 | } | |
911 | ||
80673029 | 912 | static int mtk_poll_tx(struct mtk_eth *eth, int budget) |
656e7052 JC |
913 | { |
914 | struct mtk_tx_ring *ring = ð->tx_ring; | |
915 | struct mtk_tx_dma *desc; | |
916 | struct sk_buff *skb; | |
917 | struct mtk_tx_buf *tx_buf; | |
80673029 | 918 | unsigned int done[MTK_MAX_DEVS]; |
656e7052 JC |
919 | unsigned int bytes[MTK_MAX_DEVS]; |
920 | u32 cpu, dma; | |
921 | static int condition; | |
80673029 | 922 | int total = 0, i; |
656e7052 JC |
923 | |
924 | memset(done, 0, sizeof(done)); | |
925 | memset(bytes, 0, sizeof(bytes)); | |
926 | ||
927 | cpu = mtk_r32(eth, MTK_QTX_CRX_PTR); | |
928 | dma = mtk_r32(eth, MTK_QTX_DRX_PTR); | |
929 | ||
930 | desc = mtk_qdma_phys_to_virt(ring, cpu); | |
931 | ||
932 | while ((cpu != dma) && budget) { | |
933 | u32 next_cpu = desc->txd2; | |
934 | int mac; | |
935 | ||
936 | desc = mtk_qdma_phys_to_virt(ring, desc->txd2); | |
937 | if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0) | |
938 | break; | |
939 | ||
940 | mac = (desc->txd4 >> TX_DMA_FPORT_SHIFT) & | |
941 | TX_DMA_FPORT_MASK; | |
942 | mac--; | |
943 | ||
944 | tx_buf = mtk_desc_to_tx_buf(ring, desc); | |
945 | skb = tx_buf->skb; | |
946 | if (!skb) { | |
947 | condition = 1; | |
948 | break; | |
949 | } | |
950 | ||
951 | if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) { | |
952 | bytes[mac] += skb->len; | |
953 | done[mac]++; | |
954 | budget--; | |
955 | } | |
55a4e778 | 956 | mtk_tx_unmap(eth, tx_buf); |
656e7052 | 957 | |
656e7052 JC |
958 | ring->last_free = desc; |
959 | atomic_inc(&ring->free_count); | |
960 | ||
961 | cpu = next_cpu; | |
962 | } | |
963 | ||
964 | mtk_w32(eth, cpu, MTK_QTX_CRX_PTR); | |
965 | ||
966 | for (i = 0; i < MTK_MAC_COUNT; i++) { | |
967 | if (!eth->netdev[i] || !done[i]) | |
968 | continue; | |
969 | netdev_completed_queue(eth->netdev[i], done[i], bytes[i]); | |
970 | total += done[i]; | |
971 | } | |
972 | ||
ad3cba98 JC |
973 | if (mtk_queue_stopped(eth) && |
974 | (atomic_read(&ring->free_count) > ring->thresh)) | |
13c822f6 | 975 | mtk_wake_queue(eth); |
656e7052 JC |
976 | |
977 | return total; | |
978 | } | |
979 | ||
80673029 | 980 | static void mtk_handle_status_irq(struct mtk_eth *eth) |
656e7052 | 981 | { |
80673029 | 982 | u32 status2 = mtk_r32(eth, MTK_INT_STATUS2); |
656e7052 | 983 | |
eece71e8 | 984 | if (unlikely(status2 & (MTK_GDM1_AF | MTK_GDM2_AF))) { |
656e7052 | 985 | mtk_stats_update(eth); |
eece71e8 JC |
986 | mtk_w32(eth, (MTK_GDM1_AF | MTK_GDM2_AF), |
987 | MTK_INT_STATUS2); | |
656e7052 | 988 | } |
80673029 JC |
989 | } |
990 | ||
991 | static int mtk_napi_tx(struct napi_struct *napi, int budget) | |
992 | { | |
993 | struct mtk_eth *eth = container_of(napi, struct mtk_eth, tx_napi); | |
994 | u32 status, mask; | |
995 | int tx_done = 0; | |
996 | ||
997 | mtk_handle_status_irq(eth); | |
998 | mtk_w32(eth, MTK_TX_DONE_INT, MTK_QMTK_INT_STATUS); | |
999 | tx_done = mtk_poll_tx(eth, budget); | |
1000 | ||
1001 | if (unlikely(netif_msg_intr(eth))) { | |
1002 | status = mtk_r32(eth, MTK_QMTK_INT_STATUS); | |
1003 | mask = mtk_r32(eth, MTK_QDMA_INT_MASK); | |
1004 | dev_info(eth->dev, | |
1005 | "done tx %d, intr 0x%08x/0x%x\n", | |
1006 | tx_done, status, mask); | |
1007 | } | |
1008 | ||
1009 | if (tx_done == budget) | |
1010 | return budget; | |
1011 | ||
1012 | status = mtk_r32(eth, MTK_QMTK_INT_STATUS); | |
1013 | if (status & MTK_TX_DONE_INT) | |
1014 | return budget; | |
1015 | ||
1016 | napi_complete(napi); | |
1017 | mtk_irq_enable(eth, MTK_TX_DONE_INT); | |
1018 | ||
1019 | return tx_done; | |
1020 | } | |
1021 | ||
1022 | static int mtk_napi_rx(struct napi_struct *napi, int budget) | |
1023 | { | |
1024 | struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi); | |
1025 | u32 status, mask; | |
1026 | int rx_done = 0; | |
1027 | ||
1028 | mtk_handle_status_irq(eth); | |
1029 | mtk_w32(eth, MTK_RX_DONE_INT, MTK_QMTK_INT_STATUS); | |
1030 | rx_done = mtk_poll_rx(napi, budget, eth); | |
656e7052 JC |
1031 | |
1032 | if (unlikely(netif_msg_intr(eth))) { | |
80673029 | 1033 | status = mtk_r32(eth, MTK_QMTK_INT_STATUS); |
656e7052 | 1034 | mask = mtk_r32(eth, MTK_QDMA_INT_MASK); |
80673029 JC |
1035 | dev_info(eth->dev, |
1036 | "done rx %d, intr 0x%08x/0x%x\n", | |
1037 | rx_done, status, mask); | |
656e7052 JC |
1038 | } |
1039 | ||
80673029 | 1040 | if (rx_done == budget) |
656e7052 JC |
1041 | return budget; |
1042 | ||
1043 | status = mtk_r32(eth, MTK_QMTK_INT_STATUS); | |
80673029 | 1044 | if (status & MTK_RX_DONE_INT) |
656e7052 JC |
1045 | return budget; |
1046 | ||
1047 | napi_complete(napi); | |
80673029 | 1048 | mtk_irq_enable(eth, MTK_RX_DONE_INT); |
656e7052 JC |
1049 | |
1050 | return rx_done; | |
1051 | } | |
1052 | ||
1053 | static int mtk_tx_alloc(struct mtk_eth *eth) | |
1054 | { | |
1055 | struct mtk_tx_ring *ring = ð->tx_ring; | |
1056 | int i, sz = sizeof(*ring->dma); | |
1057 | ||
1058 | ring->buf = kcalloc(MTK_DMA_SIZE, sizeof(*ring->buf), | |
1059 | GFP_KERNEL); | |
1060 | if (!ring->buf) | |
1061 | goto no_tx_mem; | |
1062 | ||
1063 | ring->dma = dma_alloc_coherent(eth->dev, | |
1064 | MTK_DMA_SIZE * sz, | |
1065 | &ring->phys, | |
1066 | GFP_ATOMIC | __GFP_ZERO); | |
1067 | if (!ring->dma) | |
1068 | goto no_tx_mem; | |
1069 | ||
1070 | memset(ring->dma, 0, MTK_DMA_SIZE * sz); | |
1071 | for (i = 0; i < MTK_DMA_SIZE; i++) { | |
1072 | int next = (i + 1) % MTK_DMA_SIZE; | |
1073 | u32 next_ptr = ring->phys + next * sz; | |
1074 | ||
1075 | ring->dma[i].txd2 = next_ptr; | |
1076 | ring->dma[i].txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; | |
1077 | } | |
1078 | ||
1079 | atomic_set(&ring->free_count, MTK_DMA_SIZE - 2); | |
1080 | ring->next_free = &ring->dma[0]; | |
12c97c13 | 1081 | ring->last_free = &ring->dma[MTK_DMA_SIZE - 1]; |
04698ccc | 1082 | ring->thresh = MAX_SKB_FRAGS; |
656e7052 JC |
1083 | |
1084 | /* make sure that all changes to the dma ring are flushed before we | |
1085 | * continue | |
1086 | */ | |
1087 | wmb(); | |
1088 | ||
1089 | mtk_w32(eth, ring->phys, MTK_QTX_CTX_PTR); | |
1090 | mtk_w32(eth, ring->phys, MTK_QTX_DTX_PTR); | |
1091 | mtk_w32(eth, | |
1092 | ring->phys + ((MTK_DMA_SIZE - 1) * sz), | |
1093 | MTK_QTX_CRX_PTR); | |
1094 | mtk_w32(eth, | |
1095 | ring->phys + ((MTK_DMA_SIZE - 1) * sz), | |
1096 | MTK_QTX_DRX_PTR); | |
1097 | ||
1098 | return 0; | |
1099 | ||
1100 | no_tx_mem: | |
1101 | return -ENOMEM; | |
1102 | } | |
1103 | ||
1104 | static void mtk_tx_clean(struct mtk_eth *eth) | |
1105 | { | |
1106 | struct mtk_tx_ring *ring = ð->tx_ring; | |
1107 | int i; | |
1108 | ||
1109 | if (ring->buf) { | |
1110 | for (i = 0; i < MTK_DMA_SIZE; i++) | |
55a4e778 | 1111 | mtk_tx_unmap(eth, &ring->buf[i]); |
656e7052 JC |
1112 | kfree(ring->buf); |
1113 | ring->buf = NULL; | |
1114 | } | |
1115 | ||
1116 | if (ring->dma) { | |
1117 | dma_free_coherent(eth->dev, | |
1118 | MTK_DMA_SIZE * sizeof(*ring->dma), | |
1119 | ring->dma, | |
1120 | ring->phys); | |
1121 | ring->dma = NULL; | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | static int mtk_rx_alloc(struct mtk_eth *eth) | |
1126 | { | |
1127 | struct mtk_rx_ring *ring = ð->rx_ring; | |
1128 | int i; | |
1129 | ||
1130 | ring->frag_size = mtk_max_frag_size(ETH_DATA_LEN); | |
1131 | ring->buf_size = mtk_max_buf_size(ring->frag_size); | |
1132 | ring->data = kcalloc(MTK_DMA_SIZE, sizeof(*ring->data), | |
1133 | GFP_KERNEL); | |
1134 | if (!ring->data) | |
1135 | return -ENOMEM; | |
1136 | ||
1137 | for (i = 0; i < MTK_DMA_SIZE; i++) { | |
1138 | ring->data[i] = netdev_alloc_frag(ring->frag_size); | |
1139 | if (!ring->data[i]) | |
1140 | return -ENOMEM; | |
1141 | } | |
1142 | ||
1143 | ring->dma = dma_alloc_coherent(eth->dev, | |
1144 | MTK_DMA_SIZE * sizeof(*ring->dma), | |
1145 | &ring->phys, | |
1146 | GFP_ATOMIC | __GFP_ZERO); | |
1147 | if (!ring->dma) | |
1148 | return -ENOMEM; | |
1149 | ||
1150 | for (i = 0; i < MTK_DMA_SIZE; i++) { | |
1151 | dma_addr_t dma_addr = dma_map_single(eth->dev, | |
1152 | ring->data[i] + NET_SKB_PAD, | |
1153 | ring->buf_size, | |
1154 | DMA_FROM_DEVICE); | |
1155 | if (unlikely(dma_mapping_error(eth->dev, dma_addr))) | |
1156 | return -ENOMEM; | |
1157 | ring->dma[i].rxd1 = (unsigned int)dma_addr; | |
1158 | ||
1159 | ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size); | |
1160 | } | |
1161 | ring->calc_idx = MTK_DMA_SIZE - 1; | |
1162 | /* make sure that all changes to the dma ring are flushed before we | |
1163 | * continue | |
1164 | */ | |
1165 | wmb(); | |
1166 | ||
1167 | mtk_w32(eth, eth->rx_ring.phys, MTK_QRX_BASE_PTR0); | |
1168 | mtk_w32(eth, MTK_DMA_SIZE, MTK_QRX_MAX_CNT0); | |
1169 | mtk_w32(eth, eth->rx_ring.calc_idx, MTK_QRX_CRX_IDX0); | |
1170 | mtk_w32(eth, MTK_PST_DRX_IDX0, MTK_QDMA_RST_IDX); | |
1171 | mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES, MTK_QTX_CFG(0)); | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | static void mtk_rx_clean(struct mtk_eth *eth) | |
1177 | { | |
1178 | struct mtk_rx_ring *ring = ð->rx_ring; | |
1179 | int i; | |
1180 | ||
1181 | if (ring->data && ring->dma) { | |
1182 | for (i = 0; i < MTK_DMA_SIZE; i++) { | |
1183 | if (!ring->data[i]) | |
1184 | continue; | |
1185 | if (!ring->dma[i].rxd1) | |
1186 | continue; | |
1187 | dma_unmap_single(eth->dev, | |
1188 | ring->dma[i].rxd1, | |
1189 | ring->buf_size, | |
1190 | DMA_FROM_DEVICE); | |
1191 | skb_free_frag(ring->data[i]); | |
1192 | } | |
1193 | kfree(ring->data); | |
1194 | ring->data = NULL; | |
1195 | } | |
1196 | ||
1197 | if (ring->dma) { | |
1198 | dma_free_coherent(eth->dev, | |
1199 | MTK_DMA_SIZE * sizeof(*ring->dma), | |
1200 | ring->dma, | |
1201 | ring->phys); | |
1202 | ring->dma = NULL; | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | /* wait for DMA to finish whatever it is doing before we start using it again */ | |
1207 | static int mtk_dma_busy_wait(struct mtk_eth *eth) | |
1208 | { | |
1209 | unsigned long t_start = jiffies; | |
1210 | ||
1211 | while (1) { | |
1212 | if (!(mtk_r32(eth, MTK_QDMA_GLO_CFG) & | |
1213 | (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) | |
1214 | return 0; | |
1215 | if (time_after(jiffies, t_start + MTK_DMA_BUSY_TIMEOUT)) | |
1216 | break; | |
1217 | } | |
1218 | ||
1219 | dev_err(eth->dev, "DMA init timeout\n"); | |
1220 | return -1; | |
1221 | } | |
1222 | ||
1223 | static int mtk_dma_init(struct mtk_eth *eth) | |
1224 | { | |
1225 | int err; | |
1226 | ||
1227 | if (mtk_dma_busy_wait(eth)) | |
1228 | return -EBUSY; | |
1229 | ||
1230 | /* QDMA needs scratch memory for internal reordering of the | |
1231 | * descriptors | |
1232 | */ | |
1233 | err = mtk_init_fq_dma(eth); | |
1234 | if (err) | |
1235 | return err; | |
1236 | ||
1237 | err = mtk_tx_alloc(eth); | |
1238 | if (err) | |
1239 | return err; | |
1240 | ||
1241 | err = mtk_rx_alloc(eth); | |
1242 | if (err) | |
1243 | return err; | |
1244 | ||
1245 | /* Enable random early drop and set drop threshold automatically */ | |
1246 | mtk_w32(eth, FC_THRES_DROP_MODE | FC_THRES_DROP_EN | FC_THRES_MIN, | |
1247 | MTK_QDMA_FC_THRES); | |
1248 | mtk_w32(eth, 0x0, MTK_QDMA_HRED2); | |
1249 | ||
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | static void mtk_dma_free(struct mtk_eth *eth) | |
1254 | { | |
1255 | int i; | |
1256 | ||
1257 | for (i = 0; i < MTK_MAC_COUNT; i++) | |
1258 | if (eth->netdev[i]) | |
1259 | netdev_reset_queue(eth->netdev[i]); | |
605e4fe4 JC |
1260 | if (eth->scratch_ring) { |
1261 | dma_free_coherent(eth->dev, | |
1262 | MTK_DMA_SIZE * sizeof(struct mtk_tx_dma), | |
1263 | eth->scratch_ring, | |
1264 | eth->phy_scratch_ring); | |
1265 | eth->scratch_ring = NULL; | |
1266 | eth->phy_scratch_ring = 0; | |
1267 | } | |
656e7052 JC |
1268 | mtk_tx_clean(eth); |
1269 | mtk_rx_clean(eth); | |
1270 | kfree(eth->scratch_head); | |
1271 | } | |
1272 | ||
1273 | static void mtk_tx_timeout(struct net_device *dev) | |
1274 | { | |
1275 | struct mtk_mac *mac = netdev_priv(dev); | |
1276 | struct mtk_eth *eth = mac->hw; | |
1277 | ||
1278 | eth->netdev[mac->id]->stats.tx_errors++; | |
1279 | netif_err(eth, tx_err, dev, | |
1280 | "transmit timed out\n"); | |
7c78b4ad | 1281 | schedule_work(ð->pending_work); |
656e7052 JC |
1282 | } |
1283 | ||
80673029 | 1284 | static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth) |
656e7052 JC |
1285 | { |
1286 | struct mtk_eth *eth = _eth; | |
656e7052 | 1287 | |
80673029 JC |
1288 | if (likely(napi_schedule_prep(ð->rx_napi))) { |
1289 | __napi_schedule(ð->rx_napi); | |
1290 | mtk_irq_disable(eth, MTK_RX_DONE_INT); | |
1291 | } | |
656e7052 | 1292 | |
80673029 JC |
1293 | return IRQ_HANDLED; |
1294 | } | |
1295 | ||
1296 | static irqreturn_t mtk_handle_irq_tx(int irq, void *_eth) | |
1297 | { | |
1298 | struct mtk_eth *eth = _eth; | |
1299 | ||
1300 | if (likely(napi_schedule_prep(ð->tx_napi))) { | |
1301 | __napi_schedule(ð->tx_napi); | |
1302 | mtk_irq_disable(eth, MTK_TX_DONE_INT); | |
656e7052 | 1303 | } |
656e7052 JC |
1304 | |
1305 | return IRQ_HANDLED; | |
1306 | } | |
1307 | ||
1308 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1309 | static void mtk_poll_controller(struct net_device *dev) | |
1310 | { | |
1311 | struct mtk_mac *mac = netdev_priv(dev); | |
1312 | struct mtk_eth *eth = mac->hw; | |
1313 | u32 int_mask = MTK_TX_DONE_INT | MTK_RX_DONE_INT; | |
1314 | ||
1315 | mtk_irq_disable(eth, int_mask); | |
8186f6e3 | 1316 | mtk_handle_irq_rx(eth->irq[2], dev); |
656e7052 JC |
1317 | mtk_irq_enable(eth, int_mask); |
1318 | } | |
1319 | #endif | |
1320 | ||
1321 | static int mtk_start_dma(struct mtk_eth *eth) | |
1322 | { | |
1323 | int err; | |
1324 | ||
1325 | err = mtk_dma_init(eth); | |
1326 | if (err) { | |
1327 | mtk_dma_free(eth); | |
1328 | return err; | |
1329 | } | |
1330 | ||
1331 | mtk_w32(eth, | |
1332 | MTK_TX_WB_DDONE | MTK_RX_DMA_EN | MTK_TX_DMA_EN | | |
1333 | MTK_RX_2B_OFFSET | MTK_DMA_SIZE_16DWORDS | | |
6675086d | 1334 | MTK_RX_BT_32DWORDS | MTK_NDP_CO_PRO, |
656e7052 JC |
1335 | MTK_QDMA_GLO_CFG); |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | static int mtk_open(struct net_device *dev) | |
1341 | { | |
1342 | struct mtk_mac *mac = netdev_priv(dev); | |
1343 | struct mtk_eth *eth = mac->hw; | |
1344 | ||
1345 | /* we run 2 netdevs on the same dma ring so we only bring it up once */ | |
1346 | if (!atomic_read(ð->dma_refcnt)) { | |
1347 | int err = mtk_start_dma(eth); | |
1348 | ||
1349 | if (err) | |
1350 | return err; | |
1351 | ||
80673029 | 1352 | napi_enable(ð->tx_napi); |
656e7052 JC |
1353 | napi_enable(ð->rx_napi); |
1354 | mtk_irq_enable(eth, MTK_TX_DONE_INT | MTK_RX_DONE_INT); | |
1355 | } | |
1356 | atomic_inc(ð->dma_refcnt); | |
1357 | ||
1358 | phy_start(mac->phy_dev); | |
1359 | netif_start_queue(dev); | |
1360 | ||
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | static void mtk_stop_dma(struct mtk_eth *eth, u32 glo_cfg) | |
1365 | { | |
1366 | unsigned long flags; | |
1367 | u32 val; | |
1368 | int i; | |
1369 | ||
1370 | /* stop the dma engine */ | |
1371 | spin_lock_irqsave(ð->page_lock, flags); | |
1372 | val = mtk_r32(eth, glo_cfg); | |
1373 | mtk_w32(eth, val & ~(MTK_TX_WB_DDONE | MTK_RX_DMA_EN | MTK_TX_DMA_EN), | |
1374 | glo_cfg); | |
1375 | spin_unlock_irqrestore(ð->page_lock, flags); | |
1376 | ||
1377 | /* wait for dma stop */ | |
1378 | for (i = 0; i < 10; i++) { | |
1379 | val = mtk_r32(eth, glo_cfg); | |
1380 | if (val & (MTK_TX_DMA_BUSY | MTK_RX_DMA_BUSY)) { | |
1381 | msleep(20); | |
1382 | continue; | |
1383 | } | |
1384 | break; | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | static int mtk_stop(struct net_device *dev) | |
1389 | { | |
1390 | struct mtk_mac *mac = netdev_priv(dev); | |
1391 | struct mtk_eth *eth = mac->hw; | |
1392 | ||
1393 | netif_tx_disable(dev); | |
1394 | phy_stop(mac->phy_dev); | |
1395 | ||
1396 | /* only shutdown DMA if this is the last user */ | |
1397 | if (!atomic_dec_and_test(ð->dma_refcnt)) | |
1398 | return 0; | |
1399 | ||
1400 | mtk_irq_disable(eth, MTK_TX_DONE_INT | MTK_RX_DONE_INT); | |
80673029 | 1401 | napi_disable(ð->tx_napi); |
656e7052 JC |
1402 | napi_disable(ð->rx_napi); |
1403 | ||
1404 | mtk_stop_dma(eth, MTK_QDMA_GLO_CFG); | |
1405 | ||
1406 | mtk_dma_free(eth); | |
1407 | ||
1408 | return 0; | |
1409 | } | |
1410 | ||
1411 | static int __init mtk_hw_init(struct mtk_eth *eth) | |
1412 | { | |
1413 | int err, i; | |
1414 | ||
1415 | /* reset the frame engine */ | |
1416 | reset_control_assert(eth->rstc); | |
1417 | usleep_range(10, 20); | |
1418 | reset_control_deassert(eth->rstc); | |
1419 | usleep_range(10, 20); | |
1420 | ||
1421 | /* Set GE2 driving and slew rate */ | |
1422 | regmap_write(eth->pctl, GPIO_DRV_SEL10, 0xa00); | |
1423 | ||
1424 | /* set GE2 TDSEL */ | |
1425 | regmap_write(eth->pctl, GPIO_OD33_CTRL8, 0x5); | |
1426 | ||
1427 | /* set GE2 TUNE */ | |
1428 | regmap_write(eth->pctl, GPIO_BIAS_CTRL, 0x0); | |
1429 | ||
1430 | /* GE1, Force 1000M/FD, FC ON */ | |
1431 | mtk_w32(eth, MAC_MCR_FIXED_LINK, MTK_MAC_MCR(0)); | |
1432 | ||
1433 | /* GE2, Force 1000M/FD, FC ON */ | |
1434 | mtk_w32(eth, MAC_MCR_FIXED_LINK, MTK_MAC_MCR(1)); | |
1435 | ||
1436 | /* Enable RX VLan Offloading */ | |
1437 | mtk_w32(eth, 1, MTK_CDMP_EG_CTRL); | |
1438 | ||
80673029 JC |
1439 | err = devm_request_irq(eth->dev, eth->irq[1], mtk_handle_irq_tx, 0, |
1440 | dev_name(eth->dev), eth); | |
1441 | if (err) | |
1442 | return err; | |
1443 | err = devm_request_irq(eth->dev, eth->irq[2], mtk_handle_irq_rx, 0, | |
656e7052 JC |
1444 | dev_name(eth->dev), eth); |
1445 | if (err) | |
1446 | return err; | |
1447 | ||
1448 | err = mtk_mdio_init(eth); | |
1449 | if (err) | |
1450 | return err; | |
1451 | ||
1452 | /* disable delay and normal interrupt */ | |
1453 | mtk_w32(eth, 0, MTK_QDMA_DELAY_INT); | |
2ff0bb61 | 1454 | mtk_irq_disable(eth, ~0); |
656e7052 JC |
1455 | mtk_w32(eth, RST_GL_PSE, MTK_RST_GL); |
1456 | mtk_w32(eth, 0, MTK_RST_GL); | |
1457 | ||
1458 | /* FE int grouping */ | |
80673029 JC |
1459 | mtk_w32(eth, MTK_TX_DONE_INT, MTK_PDMA_INT_GRP1); |
1460 | mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_GRP2); | |
1461 | mtk_w32(eth, MTK_TX_DONE_INT, MTK_QDMA_INT_GRP1); | |
1462 | mtk_w32(eth, MTK_RX_DONE_INT, MTK_QDMA_INT_GRP2); | |
1463 | mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP); | |
656e7052 JC |
1464 | |
1465 | for (i = 0; i < 2; i++) { | |
1466 | u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i)); | |
1467 | ||
1468 | /* setup the forward port to send frame to QDMA */ | |
1469 | val &= ~0xffff; | |
1470 | val |= 0x5555; | |
1471 | ||
1472 | /* Enable RX checksum */ | |
1473 | val |= MTK_GDMA_ICS_EN | MTK_GDMA_TCS_EN | MTK_GDMA_UCS_EN; | |
1474 | ||
1475 | /* setup the mac dma */ | |
1476 | mtk_w32(eth, val, MTK_GDMA_FWD_CFG(i)); | |
1477 | } | |
1478 | ||
1479 | return 0; | |
1480 | } | |
1481 | ||
1482 | static int __init mtk_init(struct net_device *dev) | |
1483 | { | |
1484 | struct mtk_mac *mac = netdev_priv(dev); | |
1485 | struct mtk_eth *eth = mac->hw; | |
1486 | const char *mac_addr; | |
1487 | ||
1488 | mac_addr = of_get_mac_address(mac->of_node); | |
1489 | if (mac_addr) | |
1490 | ether_addr_copy(dev->dev_addr, mac_addr); | |
1491 | ||
1492 | /* If the mac address is invalid, use random mac address */ | |
1493 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
1494 | random_ether_addr(dev->dev_addr); | |
1495 | dev_err(eth->dev, "generated random MAC address %pM\n", | |
1496 | dev->dev_addr); | |
1497 | dev->addr_assign_type = NET_ADDR_RANDOM; | |
1498 | } | |
1499 | ||
1500 | return mtk_phy_connect(mac); | |
1501 | } | |
1502 | ||
1503 | static void mtk_uninit(struct net_device *dev) | |
1504 | { | |
1505 | struct mtk_mac *mac = netdev_priv(dev); | |
1506 | struct mtk_eth *eth = mac->hw; | |
1507 | ||
1508 | phy_disconnect(mac->phy_dev); | |
1509 | mtk_mdio_cleanup(eth); | |
1510 | mtk_irq_disable(eth, ~0); | |
80673029 JC |
1511 | free_irq(eth->irq[1], dev); |
1512 | free_irq(eth->irq[2], dev); | |
656e7052 JC |
1513 | } |
1514 | ||
1515 | static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
1516 | { | |
1517 | struct mtk_mac *mac = netdev_priv(dev); | |
1518 | ||
1519 | switch (cmd) { | |
1520 | case SIOCGMIIPHY: | |
1521 | case SIOCGMIIREG: | |
1522 | case SIOCSMIIREG: | |
1523 | return phy_mii_ioctl(mac->phy_dev, ifr, cmd); | |
1524 | default: | |
1525 | break; | |
1526 | } | |
1527 | ||
1528 | return -EOPNOTSUPP; | |
1529 | } | |
1530 | ||
1531 | static void mtk_pending_work(struct work_struct *work) | |
1532 | { | |
7c78b4ad | 1533 | struct mtk_eth *eth = container_of(work, struct mtk_eth, pending_work); |
e7d425dc JC |
1534 | int err, i; |
1535 | unsigned long restart = 0; | |
656e7052 JC |
1536 | |
1537 | rtnl_lock(); | |
656e7052 | 1538 | |
e7d425dc JC |
1539 | /* stop all devices to make sure that dma is properly shut down */ |
1540 | for (i = 0; i < MTK_MAC_COUNT; i++) { | |
7c78b4ad | 1541 | if (!eth->netdev[i]) |
e7d425dc JC |
1542 | continue; |
1543 | mtk_stop(eth->netdev[i]); | |
1544 | __set_bit(i, &restart); | |
1545 | } | |
1546 | ||
1547 | /* restart DMA and enable IRQs */ | |
1548 | for (i = 0; i < MTK_MAC_COUNT; i++) { | |
1549 | if (!test_bit(i, &restart)) | |
1550 | continue; | |
1551 | err = mtk_open(eth->netdev[i]); | |
1552 | if (err) { | |
1553 | netif_alert(eth, ifup, eth->netdev[i], | |
1554 | "Driver up/down cycle failed, closing device.\n"); | |
1555 | dev_close(eth->netdev[i]); | |
1556 | } | |
656e7052 JC |
1557 | } |
1558 | rtnl_unlock(); | |
1559 | } | |
1560 | ||
1561 | static int mtk_cleanup(struct mtk_eth *eth) | |
1562 | { | |
1563 | int i; | |
1564 | ||
1565 | for (i = 0; i < MTK_MAC_COUNT; i++) { | |
656e7052 JC |
1566 | if (!eth->netdev[i]) |
1567 | continue; | |
1568 | ||
1569 | unregister_netdev(eth->netdev[i]); | |
1570 | free_netdev(eth->netdev[i]); | |
656e7052 | 1571 | } |
7c78b4ad | 1572 | cancel_work_sync(ð->pending_work); |
656e7052 JC |
1573 | |
1574 | return 0; | |
1575 | } | |
1576 | ||
1577 | static int mtk_get_settings(struct net_device *dev, | |
1578 | struct ethtool_cmd *cmd) | |
1579 | { | |
1580 | struct mtk_mac *mac = netdev_priv(dev); | |
1581 | int err; | |
1582 | ||
1583 | err = phy_read_status(mac->phy_dev); | |
1584 | if (err) | |
1585 | return -ENODEV; | |
1586 | ||
1587 | return phy_ethtool_gset(mac->phy_dev, cmd); | |
1588 | } | |
1589 | ||
1590 | static int mtk_set_settings(struct net_device *dev, | |
1591 | struct ethtool_cmd *cmd) | |
1592 | { | |
1593 | struct mtk_mac *mac = netdev_priv(dev); | |
1594 | ||
1595 | if (cmd->phy_address != mac->phy_dev->mdio.addr) { | |
1596 | mac->phy_dev = mdiobus_get_phy(mac->hw->mii_bus, | |
1597 | cmd->phy_address); | |
1598 | if (!mac->phy_dev) | |
1599 | return -ENODEV; | |
1600 | } | |
1601 | ||
1602 | return phy_ethtool_sset(mac->phy_dev, cmd); | |
1603 | } | |
1604 | ||
1605 | static void mtk_get_drvinfo(struct net_device *dev, | |
1606 | struct ethtool_drvinfo *info) | |
1607 | { | |
1608 | struct mtk_mac *mac = netdev_priv(dev); | |
1609 | ||
1610 | strlcpy(info->driver, mac->hw->dev->driver->name, sizeof(info->driver)); | |
1611 | strlcpy(info->bus_info, dev_name(mac->hw->dev), sizeof(info->bus_info)); | |
1612 | info->n_stats = ARRAY_SIZE(mtk_ethtool_stats); | |
1613 | } | |
1614 | ||
1615 | static u32 mtk_get_msglevel(struct net_device *dev) | |
1616 | { | |
1617 | struct mtk_mac *mac = netdev_priv(dev); | |
1618 | ||
1619 | return mac->hw->msg_enable; | |
1620 | } | |
1621 | ||
1622 | static void mtk_set_msglevel(struct net_device *dev, u32 value) | |
1623 | { | |
1624 | struct mtk_mac *mac = netdev_priv(dev); | |
1625 | ||
1626 | mac->hw->msg_enable = value; | |
1627 | } | |
1628 | ||
1629 | static int mtk_nway_reset(struct net_device *dev) | |
1630 | { | |
1631 | struct mtk_mac *mac = netdev_priv(dev); | |
1632 | ||
1633 | return genphy_restart_aneg(mac->phy_dev); | |
1634 | } | |
1635 | ||
1636 | static u32 mtk_get_link(struct net_device *dev) | |
1637 | { | |
1638 | struct mtk_mac *mac = netdev_priv(dev); | |
1639 | int err; | |
1640 | ||
1641 | err = genphy_update_link(mac->phy_dev); | |
1642 | if (err) | |
1643 | return ethtool_op_get_link(dev); | |
1644 | ||
1645 | return mac->phy_dev->link; | |
1646 | } | |
1647 | ||
1648 | static void mtk_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
1649 | { | |
1650 | int i; | |
1651 | ||
1652 | switch (stringset) { | |
1653 | case ETH_SS_STATS: | |
1654 | for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) { | |
1655 | memcpy(data, mtk_ethtool_stats[i].str, ETH_GSTRING_LEN); | |
1656 | data += ETH_GSTRING_LEN; | |
1657 | } | |
1658 | break; | |
1659 | } | |
1660 | } | |
1661 | ||
1662 | static int mtk_get_sset_count(struct net_device *dev, int sset) | |
1663 | { | |
1664 | switch (sset) { | |
1665 | case ETH_SS_STATS: | |
1666 | return ARRAY_SIZE(mtk_ethtool_stats); | |
1667 | default: | |
1668 | return -EOPNOTSUPP; | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | static void mtk_get_ethtool_stats(struct net_device *dev, | |
1673 | struct ethtool_stats *stats, u64 *data) | |
1674 | { | |
1675 | struct mtk_mac *mac = netdev_priv(dev); | |
1676 | struct mtk_hw_stats *hwstats = mac->hw_stats; | |
1677 | u64 *data_src, *data_dst; | |
1678 | unsigned int start; | |
1679 | int i; | |
1680 | ||
1681 | if (netif_running(dev) && netif_device_present(dev)) { | |
1682 | if (spin_trylock(&hwstats->stats_lock)) { | |
1683 | mtk_stats_update_mac(mac); | |
1684 | spin_unlock(&hwstats->stats_lock); | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | do { | |
1689 | data_src = (u64*)hwstats; | |
1690 | data_dst = data; | |
1691 | start = u64_stats_fetch_begin_irq(&hwstats->syncp); | |
1692 | ||
1693 | for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) | |
1694 | *data_dst++ = *(data_src + mtk_ethtool_stats[i].offset); | |
1695 | } while (u64_stats_fetch_retry_irq(&hwstats->syncp, start)); | |
1696 | } | |
1697 | ||
1698 | static struct ethtool_ops mtk_ethtool_ops = { | |
1699 | .get_settings = mtk_get_settings, | |
1700 | .set_settings = mtk_set_settings, | |
1701 | .get_drvinfo = mtk_get_drvinfo, | |
1702 | .get_msglevel = mtk_get_msglevel, | |
1703 | .set_msglevel = mtk_set_msglevel, | |
1704 | .nway_reset = mtk_nway_reset, | |
1705 | .get_link = mtk_get_link, | |
1706 | .get_strings = mtk_get_strings, | |
1707 | .get_sset_count = mtk_get_sset_count, | |
1708 | .get_ethtool_stats = mtk_get_ethtool_stats, | |
1709 | }; | |
1710 | ||
1711 | static const struct net_device_ops mtk_netdev_ops = { | |
1712 | .ndo_init = mtk_init, | |
1713 | .ndo_uninit = mtk_uninit, | |
1714 | .ndo_open = mtk_open, | |
1715 | .ndo_stop = mtk_stop, | |
1716 | .ndo_start_xmit = mtk_start_xmit, | |
1717 | .ndo_set_mac_address = mtk_set_mac_address, | |
1718 | .ndo_validate_addr = eth_validate_addr, | |
1719 | .ndo_do_ioctl = mtk_do_ioctl, | |
1720 | .ndo_change_mtu = eth_change_mtu, | |
1721 | .ndo_tx_timeout = mtk_tx_timeout, | |
1722 | .ndo_get_stats64 = mtk_get_stats64, | |
1723 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1724 | .ndo_poll_controller = mtk_poll_controller, | |
1725 | #endif | |
1726 | }; | |
1727 | ||
1728 | static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np) | |
1729 | { | |
1730 | struct mtk_mac *mac; | |
1731 | const __be32 *_id = of_get_property(np, "reg", NULL); | |
1732 | int id, err; | |
1733 | ||
1734 | if (!_id) { | |
1735 | dev_err(eth->dev, "missing mac id\n"); | |
1736 | return -EINVAL; | |
1737 | } | |
1738 | ||
1739 | id = be32_to_cpup(_id); | |
1740 | if (id >= MTK_MAC_COUNT) { | |
1741 | dev_err(eth->dev, "%d is not a valid mac id\n", id); | |
1742 | return -EINVAL; | |
1743 | } | |
1744 | ||
1745 | if (eth->netdev[id]) { | |
1746 | dev_err(eth->dev, "duplicate mac id found: %d\n", id); | |
1747 | return -EINVAL; | |
1748 | } | |
1749 | ||
1750 | eth->netdev[id] = alloc_etherdev(sizeof(*mac)); | |
1751 | if (!eth->netdev[id]) { | |
1752 | dev_err(eth->dev, "alloc_etherdev failed\n"); | |
1753 | return -ENOMEM; | |
1754 | } | |
1755 | mac = netdev_priv(eth->netdev[id]); | |
1756 | eth->mac[id] = mac; | |
1757 | mac->id = id; | |
1758 | mac->hw = eth; | |
1759 | mac->of_node = np; | |
656e7052 JC |
1760 | |
1761 | mac->hw_stats = devm_kzalloc(eth->dev, | |
1762 | sizeof(*mac->hw_stats), | |
1763 | GFP_KERNEL); | |
1764 | if (!mac->hw_stats) { | |
1765 | dev_err(eth->dev, "failed to allocate counter memory\n"); | |
1766 | err = -ENOMEM; | |
1767 | goto free_netdev; | |
1768 | } | |
1769 | spin_lock_init(&mac->hw_stats->stats_lock); | |
d7005652 | 1770 | u64_stats_init(&mac->hw_stats->syncp); |
656e7052 JC |
1771 | mac->hw_stats->reg_offset = id * MTK_STAT_OFFSET; |
1772 | ||
1773 | SET_NETDEV_DEV(eth->netdev[id], eth->dev); | |
eaadf9fd | 1774 | eth->netdev[id]->watchdog_timeo = 5 * HZ; |
656e7052 JC |
1775 | eth->netdev[id]->netdev_ops = &mtk_netdev_ops; |
1776 | eth->netdev[id]->base_addr = (unsigned long)eth->base; | |
1777 | eth->netdev[id]->vlan_features = MTK_HW_FEATURES & | |
1778 | ~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX); | |
1779 | eth->netdev[id]->features |= MTK_HW_FEATURES; | |
1780 | eth->netdev[id]->ethtool_ops = &mtk_ethtool_ops; | |
1781 | ||
1782 | err = register_netdev(eth->netdev[id]); | |
1783 | if (err) { | |
1784 | dev_err(eth->dev, "error bringing up device\n"); | |
1785 | goto free_netdev; | |
1786 | } | |
80673029 | 1787 | eth->netdev[id]->irq = eth->irq[0]; |
656e7052 JC |
1788 | netif_info(eth, probe, eth->netdev[id], |
1789 | "mediatek frame engine at 0x%08lx, irq %d\n", | |
80673029 | 1790 | eth->netdev[id]->base_addr, eth->irq[0]); |
656e7052 JC |
1791 | |
1792 | return 0; | |
1793 | ||
1794 | free_netdev: | |
1795 | free_netdev(eth->netdev[id]); | |
1796 | return err; | |
1797 | } | |
1798 | ||
1799 | static int mtk_probe(struct platform_device *pdev) | |
1800 | { | |
1801 | struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1802 | struct device_node *mac_np; | |
1803 | const struct of_device_id *match; | |
1804 | struct mtk_soc_data *soc; | |
1805 | struct mtk_eth *eth; | |
1806 | int err; | |
80673029 | 1807 | int i; |
656e7052 | 1808 | |
656e7052 JC |
1809 | match = of_match_device(of_mtk_match, &pdev->dev); |
1810 | soc = (struct mtk_soc_data *)match->data; | |
1811 | ||
1812 | eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL); | |
1813 | if (!eth) | |
1814 | return -ENOMEM; | |
1815 | ||
1816 | eth->base = devm_ioremap_resource(&pdev->dev, res); | |
621e49f6 VZ |
1817 | if (IS_ERR(eth->base)) |
1818 | return PTR_ERR(eth->base); | |
656e7052 JC |
1819 | |
1820 | spin_lock_init(ð->page_lock); | |
7bc9ccec | 1821 | spin_lock_init(ð->irq_lock); |
656e7052 JC |
1822 | |
1823 | eth->ethsys = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, | |
1824 | "mediatek,ethsys"); | |
1825 | if (IS_ERR(eth->ethsys)) { | |
1826 | dev_err(&pdev->dev, "no ethsys regmap found\n"); | |
1827 | return PTR_ERR(eth->ethsys); | |
1828 | } | |
1829 | ||
1830 | eth->pctl = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, | |
1831 | "mediatek,pctl"); | |
1832 | if (IS_ERR(eth->pctl)) { | |
1833 | dev_err(&pdev->dev, "no pctl regmap found\n"); | |
1834 | return PTR_ERR(eth->pctl); | |
1835 | } | |
1836 | ||
1837 | eth->rstc = devm_reset_control_get(&pdev->dev, "eth"); | |
1838 | if (IS_ERR(eth->rstc)) { | |
1839 | dev_err(&pdev->dev, "no eth reset found\n"); | |
1840 | return PTR_ERR(eth->rstc); | |
1841 | } | |
1842 | ||
80673029 JC |
1843 | for (i = 0; i < 3; i++) { |
1844 | eth->irq[i] = platform_get_irq(pdev, i); | |
1845 | if (eth->irq[i] < 0) { | |
1846 | dev_err(&pdev->dev, "no IRQ%d resource found\n", i); | |
1847 | return -ENXIO; | |
1848 | } | |
656e7052 JC |
1849 | } |
1850 | ||
1851 | eth->clk_ethif = devm_clk_get(&pdev->dev, "ethif"); | |
1852 | eth->clk_esw = devm_clk_get(&pdev->dev, "esw"); | |
1853 | eth->clk_gp1 = devm_clk_get(&pdev->dev, "gp1"); | |
1854 | eth->clk_gp2 = devm_clk_get(&pdev->dev, "gp2"); | |
1855 | if (IS_ERR(eth->clk_esw) || IS_ERR(eth->clk_gp1) || | |
1856 | IS_ERR(eth->clk_gp2) || IS_ERR(eth->clk_ethif)) | |
1857 | return -ENODEV; | |
1858 | ||
1859 | clk_prepare_enable(eth->clk_ethif); | |
1860 | clk_prepare_enable(eth->clk_esw); | |
1861 | clk_prepare_enable(eth->clk_gp1); | |
1862 | clk_prepare_enable(eth->clk_gp2); | |
1863 | ||
1864 | eth->dev = &pdev->dev; | |
1865 | eth->msg_enable = netif_msg_init(mtk_msg_level, MTK_DEFAULT_MSG_ENABLE); | |
7c78b4ad | 1866 | INIT_WORK(ð->pending_work, mtk_pending_work); |
656e7052 JC |
1867 | |
1868 | err = mtk_hw_init(eth); | |
1869 | if (err) | |
1870 | return err; | |
1871 | ||
1872 | for_each_child_of_node(pdev->dev.of_node, mac_np) { | |
1873 | if (!of_device_is_compatible(mac_np, | |
1874 | "mediatek,eth-mac")) | |
1875 | continue; | |
1876 | ||
1877 | if (!of_device_is_available(mac_np)) | |
1878 | continue; | |
1879 | ||
1880 | err = mtk_add_mac(eth, mac_np); | |
1881 | if (err) | |
1882 | goto err_free_dev; | |
1883 | } | |
1884 | ||
1885 | /* we run 2 devices on the same DMA ring so we need a dummy device | |
1886 | * for NAPI to work | |
1887 | */ | |
1888 | init_dummy_netdev(ð->dummy_dev); | |
80673029 JC |
1889 | netif_napi_add(ð->dummy_dev, ð->tx_napi, mtk_napi_tx, |
1890 | MTK_NAPI_WEIGHT); | |
1891 | netif_napi_add(ð->dummy_dev, ð->rx_napi, mtk_napi_rx, | |
656e7052 JC |
1892 | MTK_NAPI_WEIGHT); |
1893 | ||
1894 | platform_set_drvdata(pdev, eth); | |
1895 | ||
1896 | return 0; | |
1897 | ||
1898 | err_free_dev: | |
1899 | mtk_cleanup(eth); | |
1900 | return err; | |
1901 | } | |
1902 | ||
1903 | static int mtk_remove(struct platform_device *pdev) | |
1904 | { | |
1905 | struct mtk_eth *eth = platform_get_drvdata(pdev); | |
1906 | ||
1907 | clk_disable_unprepare(eth->clk_ethif); | |
1908 | clk_disable_unprepare(eth->clk_esw); | |
1909 | clk_disable_unprepare(eth->clk_gp1); | |
1910 | clk_disable_unprepare(eth->clk_gp2); | |
1911 | ||
80673029 | 1912 | netif_napi_del(ð->tx_napi); |
656e7052 JC |
1913 | netif_napi_del(ð->rx_napi); |
1914 | mtk_cleanup(eth); | |
1915 | platform_set_drvdata(pdev, NULL); | |
1916 | ||
1917 | return 0; | |
1918 | } | |
1919 | ||
1920 | const struct of_device_id of_mtk_match[] = { | |
1921 | { .compatible = "mediatek,mt7623-eth" }, | |
1922 | {}, | |
1923 | }; | |
1924 | ||
1925 | static struct platform_driver mtk_driver = { | |
1926 | .probe = mtk_probe, | |
1927 | .remove = mtk_remove, | |
1928 | .driver = { | |
1929 | .name = "mtk_soc_eth", | |
656e7052 JC |
1930 | .of_match_table = of_mtk_match, |
1931 | }, | |
1932 | }; | |
1933 | ||
1934 | module_platform_driver(mtk_driver); | |
1935 | ||
1936 | MODULE_LICENSE("GPL"); | |
1937 | MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); | |
1938 | MODULE_DESCRIPTION("Ethernet driver for MediaTek SoC"); |