1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *
4  *   Copyright (C) 2009-2016 John Crispin <blogic@openwrt.org>
5  *   Copyright (C) 2009-2016 Felix Fietkau <nbd@openwrt.org>
6  *   Copyright (C) 2013-2016 Michael Lee <igvtee@gmail.com>
7  */
8 
9 #include <linux/of_device.h>
10 #include <linux/of_mdio.h>
11 #include <linux/of_net.h>
12 #include <linux/mfd/syscon.h>
13 #include <linux/regmap.h>
14 #include <linux/clk.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/if_vlan.h>
17 #include <linux/reset.h>
18 #include <linux/tcp.h>
19 #include <linux/interrupt.h>
20 #include <linux/pinctrl/devinfo.h>
21 #include <linux/phylink.h>
22 
23 #include "mtk_eth_soc.h"
24 
25 static int mtk_msg_level = -1;
26 module_param_named(msg_level, mtk_msg_level, int, 0);
27 MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
28 
29 #define MTK_ETHTOOL_STAT(x) { #x, \
30 			      offsetof(struct mtk_hw_stats, x) / sizeof(u64) }
31 
32 /* strings used by ethtool */
33 static const struct mtk_ethtool_stats {
34 	char str[ETH_GSTRING_LEN];
35 	u32 offset;
36 } mtk_ethtool_stats[] = {
37 	MTK_ETHTOOL_STAT(tx_bytes),
38 	MTK_ETHTOOL_STAT(tx_packets),
39 	MTK_ETHTOOL_STAT(tx_skip),
40 	MTK_ETHTOOL_STAT(tx_collisions),
41 	MTK_ETHTOOL_STAT(rx_bytes),
42 	MTK_ETHTOOL_STAT(rx_packets),
43 	MTK_ETHTOOL_STAT(rx_overflow),
44 	MTK_ETHTOOL_STAT(rx_fcs_errors),
45 	MTK_ETHTOOL_STAT(rx_short_errors),
46 	MTK_ETHTOOL_STAT(rx_long_errors),
47 	MTK_ETHTOOL_STAT(rx_checksum_errors),
48 	MTK_ETHTOOL_STAT(rx_flow_control_packets),
49 };
50 
51 static const char * const mtk_clks_source_name[] = {
52 	"ethif", "sgmiitop", "esw", "gp0", "gp1", "gp2", "fe", "trgpll",
53 	"sgmii_tx250m", "sgmii_rx250m", "sgmii_cdr_ref", "sgmii_cdr_fb",
54 	"sgmii2_tx250m", "sgmii2_rx250m", "sgmii2_cdr_ref", "sgmii2_cdr_fb",
55 	"sgmii_ck", "eth2pll",
56 };
57 
mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg)58 void mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg)
59 {
60 	__raw_writel(val, eth->base + reg);
61 }
62 
mtk_r32(struct mtk_eth *eth, unsigned reg)63 u32 mtk_r32(struct mtk_eth *eth, unsigned reg)
64 {
65 	return __raw_readl(eth->base + reg);
66 }
67 
mtk_m32(struct mtk_eth *eth, u32 mask, u32 set, unsigned reg)68 static u32 mtk_m32(struct mtk_eth *eth, u32 mask, u32 set, unsigned reg)
69 {
70 	u32 val;
71 
72 	val = mtk_r32(eth, reg);
73 	val &= ~mask;
74 	val |= set;
75 	mtk_w32(eth, val, reg);
76 	return reg;
77 }
78 
mtk_mdio_busy_wait(struct mtk_eth *eth)79 static int mtk_mdio_busy_wait(struct mtk_eth *eth)
80 {
81 	unsigned long t_start = jiffies;
82 
83 	while (1) {
84 		if (!(mtk_r32(eth, MTK_PHY_IAC) & PHY_IAC_ACCESS))
85 			return 0;
86 		if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT))
87 			break;
88 		usleep_range(10, 20);
89 	}
90 
91 	dev_err(eth->dev, "mdio: MDIO timeout\n");
92 	return -1;
93 }
94 
_mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, u32 phy_register, u32 write_data)95 static u32 _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr,
96 			   u32 phy_register, u32 write_data)
97 {
98 	if (mtk_mdio_busy_wait(eth))
99 		return -1;
100 
101 	write_data &= 0xffff;
102 
103 	mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE |
104 		(phy_register << PHY_IAC_REG_SHIFT) |
105 		(phy_addr << PHY_IAC_ADDR_SHIFT) | write_data,
106 		MTK_PHY_IAC);
107 
108 	if (mtk_mdio_busy_wait(eth))
109 		return -1;
110 
111 	return 0;
112 }
113 
_mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg)114 static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg)
115 {
116 	u32 d;
117 
118 	if (mtk_mdio_busy_wait(eth))
119 		return 0xffff;
120 
121 	mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ |
122 		(phy_reg << PHY_IAC_REG_SHIFT) |
123 		(phy_addr << PHY_IAC_ADDR_SHIFT),
124 		MTK_PHY_IAC);
125 
126 	if (mtk_mdio_busy_wait(eth))
127 		return 0xffff;
128 
129 	d = mtk_r32(eth, MTK_PHY_IAC) & 0xffff;
130 
131 	return d;
132 }
133 
mtk_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val)134 static int mtk_mdio_write(struct mii_bus *bus, int phy_addr,
135 			  int phy_reg, u16 val)
136 {
137 	struct mtk_eth *eth = bus->priv;
138 
139 	return _mtk_mdio_write(eth, phy_addr, phy_reg, val);
140 }
141 
mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)142 static int mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
143 {
144 	struct mtk_eth *eth = bus->priv;
145 
146 	return _mtk_mdio_read(eth, phy_addr, phy_reg);
147 }
148 
mt7621_gmac0_rgmii_adjust(struct mtk_eth *eth, phy_interface_t interface)149 static int mt7621_gmac0_rgmii_adjust(struct mtk_eth *eth,
150 				     phy_interface_t interface)
151 {
152 	u32 val;
153 
154 	/* Check DDR memory type.
155 	 * Currently TRGMII mode with DDR2 memory is not supported.
156 	 */
157 	regmap_read(eth->ethsys, ETHSYS_SYSCFG, &val);
158 	if (interface == PHY_INTERFACE_MODE_TRGMII &&
159 	    val & SYSCFG_DRAM_TYPE_DDR2) {
160 		dev_err(eth->dev,
161 			"TRGMII mode with DDR2 memory is not supported!\n");
162 		return -EOPNOTSUPP;
163 	}
164 
165 	val = (interface == PHY_INTERFACE_MODE_TRGMII) ?
166 		ETHSYS_TRGMII_MT7621_DDR_PLL : 0;
167 
168 	regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0,
169 			   ETHSYS_TRGMII_MT7621_MASK, val);
170 
171 	return 0;
172 }
173 
mtk_gmac0_rgmii_adjust(struct mtk_eth *eth, phy_interface_t interface, int speed)174 static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth,
175 				   phy_interface_t interface, int speed)
176 {
177 	u32 val;
178 	int ret;
179 
180 	if (interface == PHY_INTERFACE_MODE_TRGMII) {
181 		mtk_w32(eth, TRGMII_MODE, INTF_MODE);
182 		val = 500000000;
183 		ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val);
184 		if (ret)
185 			dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret);
186 		return;
187 	}
188 
189 	val = (speed == SPEED_1000) ?
190 		INTF_MODE_RGMII_1000 : INTF_MODE_RGMII_10_100;
191 	mtk_w32(eth, val, INTF_MODE);
192 
193 	regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0,
194 			   ETHSYS_TRGMII_CLK_SEL362_5,
195 			   ETHSYS_TRGMII_CLK_SEL362_5);
196 
197 	val = (speed == SPEED_1000) ? 250000000 : 500000000;
198 	ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val);
199 	if (ret)
200 		dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret);
201 
202 	val = (speed == SPEED_1000) ?
203 		RCK_CTRL_RGMII_1000 : RCK_CTRL_RGMII_10_100;
204 	mtk_w32(eth, val, TRGMII_RCK_CTRL);
205 
206 	val = (speed == SPEED_1000) ?
207 		TCK_CTRL_RGMII_1000 : TCK_CTRL_RGMII_10_100;
208 	mtk_w32(eth, val, TRGMII_TCK_CTRL);
209 }
210 
mtk_mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state)211 static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
212 			   const struct phylink_link_state *state)
213 {
214 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
215 					   phylink_config);
216 	struct mtk_eth *eth = mac->hw;
217 	u32 mcr_cur, mcr_new, sid, i;
218 	int val, ge_mode, err = 0;
219 
220 	/* MT76x8 has no hardware settings between for the MAC */
221 	if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628) &&
222 	    mac->interface != state->interface) {
223 		/* Setup soc pin functions */
224 		switch (state->interface) {
225 		case PHY_INTERFACE_MODE_TRGMII:
226 			if (mac->id)
227 				goto err_phy;
228 			if (!MTK_HAS_CAPS(mac->hw->soc->caps,
229 					  MTK_GMAC1_TRGMII))
230 				goto err_phy;
231 			fallthrough;
232 		case PHY_INTERFACE_MODE_RGMII_TXID:
233 		case PHY_INTERFACE_MODE_RGMII_RXID:
234 		case PHY_INTERFACE_MODE_RGMII_ID:
235 		case PHY_INTERFACE_MODE_RGMII:
236 		case PHY_INTERFACE_MODE_MII:
237 		case PHY_INTERFACE_MODE_REVMII:
238 		case PHY_INTERFACE_MODE_RMII:
239 			if (MTK_HAS_CAPS(eth->soc->caps, MTK_RGMII)) {
240 				err = mtk_gmac_rgmii_path_setup(eth, mac->id);
241 				if (err)
242 					goto init_err;
243 			}
244 			break;
245 		case PHY_INTERFACE_MODE_1000BASEX:
246 		case PHY_INTERFACE_MODE_2500BASEX:
247 		case PHY_INTERFACE_MODE_SGMII:
248 			if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) {
249 				err = mtk_gmac_sgmii_path_setup(eth, mac->id);
250 				if (err)
251 					goto init_err;
252 			}
253 			break;
254 		case PHY_INTERFACE_MODE_GMII:
255 			if (MTK_HAS_CAPS(eth->soc->caps, MTK_GEPHY)) {
256 				err = mtk_gmac_gephy_path_setup(eth, mac->id);
257 				if (err)
258 					goto init_err;
259 			}
260 			break;
261 		default:
262 			goto err_phy;
263 		}
264 
265 		/* Setup clock for 1st gmac */
266 		if (!mac->id && state->interface != PHY_INTERFACE_MODE_SGMII &&
267 		    !phy_interface_mode_is_8023z(state->interface) &&
268 		    MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GMAC1_TRGMII)) {
269 			if (MTK_HAS_CAPS(mac->hw->soc->caps,
270 					 MTK_TRGMII_MT7621_CLK)) {
271 				if (mt7621_gmac0_rgmii_adjust(mac->hw,
272 							      state->interface))
273 					goto err_phy;
274 			} else {
275 				mtk_gmac0_rgmii_adjust(mac->hw,
276 						       state->interface,
277 						       state->speed);
278 
279 				/* mt7623_pad_clk_setup */
280 				for (i = 0 ; i < NUM_TRGMII_CTRL; i++)
281 					mtk_w32(mac->hw,
282 						TD_DM_DRVP(8) | TD_DM_DRVN(8),
283 						TRGMII_TD_ODT(i));
284 
285 				/* Assert/release MT7623 RXC reset */
286 				mtk_m32(mac->hw, 0, RXC_RST | RXC_DQSISEL,
287 					TRGMII_RCK_CTRL);
288 				mtk_m32(mac->hw, RXC_RST, 0, TRGMII_RCK_CTRL);
289 			}
290 		}
291 
292 		ge_mode = 0;
293 		switch (state->interface) {
294 		case PHY_INTERFACE_MODE_MII:
295 		case PHY_INTERFACE_MODE_GMII:
296 			ge_mode = 1;
297 			break;
298 		case PHY_INTERFACE_MODE_REVMII:
299 			ge_mode = 2;
300 			break;
301 		case PHY_INTERFACE_MODE_RMII:
302 			if (mac->id)
303 				goto err_phy;
304 			ge_mode = 3;
305 			break;
306 		default:
307 			break;
308 		}
309 
310 		/* put the gmac into the right mode */
311 		regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
312 		val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, mac->id);
313 		val |= SYSCFG0_GE_MODE(ge_mode, mac->id);
314 		regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val);
315 
316 		mac->interface = state->interface;
317 	}
318 
319 	/* SGMII */
320 	if (state->interface == PHY_INTERFACE_MODE_SGMII ||
321 	    phy_interface_mode_is_8023z(state->interface)) {
322 		/* The path GMAC to SGMII will be enabled once the SGMIISYS is
323 		 * being setup done.
324 		 */
325 		regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
326 
327 		regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
328 				   SYSCFG0_SGMII_MASK,
329 				   ~(u32)SYSCFG0_SGMII_MASK);
330 
331 		/* Decide how GMAC and SGMIISYS be mapped */
332 		sid = (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_SGMII)) ?
333 		       0 : mac->id;
334 
335 		/* Setup SGMIISYS with the determined property */
336 		if (state->interface != PHY_INTERFACE_MODE_SGMII)
337 			err = mtk_sgmii_setup_mode_force(eth->sgmii, sid,
338 							 state);
339 		else if (phylink_autoneg_inband(mode))
340 			err = mtk_sgmii_setup_mode_an(eth->sgmii, sid);
341 
342 		if (err)
343 			goto init_err;
344 
345 		regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
346 				   SYSCFG0_SGMII_MASK, val);
347 	} else if (phylink_autoneg_inband(mode)) {
348 		dev_err(eth->dev,
349 			"In-band mode not supported in non SGMII mode!\n");
350 		return;
351 	}
352 
353 	/* Setup gmac */
354 	mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
355 	mcr_new = mcr_cur;
356 	mcr_new |= MAC_MCR_MAX_RX_1536 | MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE |
357 		   MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK |
358 		   MAC_MCR_RX_FIFO_CLR_DIS;
359 
360 	/* Only update control register when needed! */
361 	if (mcr_new != mcr_cur)
362 		mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id));
363 
364 	return;
365 
366 err_phy:
367 	dev_err(eth->dev, "%s: GMAC%d mode %s not supported!\n", __func__,
368 		mac->id, phy_modes(state->interface));
369 	return;
370 
371 init_err:
372 	dev_err(eth->dev, "%s: GMAC%d mode %s err: %d!\n", __func__,
373 		mac->id, phy_modes(state->interface), err);
374 }
375 
mtk_mac_pcs_get_state(struct phylink_config *config, struct phylink_link_state *state)376 static void mtk_mac_pcs_get_state(struct phylink_config *config,
377 				  struct phylink_link_state *state)
378 {
379 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
380 					   phylink_config);
381 	u32 pmsr = mtk_r32(mac->hw, MTK_MAC_MSR(mac->id));
382 
383 	state->link = (pmsr & MAC_MSR_LINK);
384 	state->duplex = (pmsr & MAC_MSR_DPX) >> 1;
385 
386 	switch (pmsr & (MAC_MSR_SPEED_1000 | MAC_MSR_SPEED_100)) {
387 	case 0:
388 		state->speed = SPEED_10;
389 		break;
390 	case MAC_MSR_SPEED_100:
391 		state->speed = SPEED_100;
392 		break;
393 	case MAC_MSR_SPEED_1000:
394 		state->speed = SPEED_1000;
395 		break;
396 	default:
397 		state->speed = SPEED_UNKNOWN;
398 		break;
399 	}
400 
401 	state->pause &= (MLO_PAUSE_RX | MLO_PAUSE_TX);
402 	if (pmsr & MAC_MSR_RX_FC)
403 		state->pause |= MLO_PAUSE_RX;
404 	if (pmsr & MAC_MSR_TX_FC)
405 		state->pause |= MLO_PAUSE_TX;
406 }
407 
mtk_mac_an_restart(struct phylink_config *config)408 static void mtk_mac_an_restart(struct phylink_config *config)
409 {
410 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
411 					   phylink_config);
412 
413 	mtk_sgmii_restart_an(mac->hw, mac->id);
414 }
415 
mtk_mac_link_down(struct phylink_config *config, unsigned int mode, phy_interface_t interface)416 static void mtk_mac_link_down(struct phylink_config *config, unsigned int mode,
417 			      phy_interface_t interface)
418 {
419 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
420 					   phylink_config);
421 	u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
422 
423 	mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN);
424 	mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
425 }
426 
mtk_mac_link_up(struct phylink_config *config, struct phy_device *phy, unsigned int mode, phy_interface_t interface, int speed, int duplex, bool tx_pause, bool rx_pause)427 static void mtk_mac_link_up(struct phylink_config *config,
428 			    struct phy_device *phy,
429 			    unsigned int mode, phy_interface_t interface,
430 			    int speed, int duplex, bool tx_pause, bool rx_pause)
431 {
432 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
433 					   phylink_config);
434 	u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
435 
436 	mcr &= ~(MAC_MCR_SPEED_100 | MAC_MCR_SPEED_1000 |
437 		 MAC_MCR_FORCE_DPX | MAC_MCR_FORCE_TX_FC |
438 		 MAC_MCR_FORCE_RX_FC);
439 
440 	/* Configure speed */
441 	switch (speed) {
442 	case SPEED_2500:
443 	case SPEED_1000:
444 		mcr |= MAC_MCR_SPEED_1000;
445 		break;
446 	case SPEED_100:
447 		mcr |= MAC_MCR_SPEED_100;
448 		break;
449 	}
450 
451 	/* Configure duplex */
452 	if (duplex == DUPLEX_FULL)
453 		mcr |= MAC_MCR_FORCE_DPX;
454 
455 	/* Configure pause modes - phylink will avoid these for half duplex */
456 	if (tx_pause)
457 		mcr |= MAC_MCR_FORCE_TX_FC;
458 	if (rx_pause)
459 		mcr |= MAC_MCR_FORCE_RX_FC;
460 
461 	mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN;
462 	mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
463 }
464 
mtk_validate(struct phylink_config *config, unsigned long *supported, struct phylink_link_state *state)465 static void mtk_validate(struct phylink_config *config,
466 			 unsigned long *supported,
467 			 struct phylink_link_state *state)
468 {
469 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
470 					   phylink_config);
471 	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
472 
473 	if (state->interface != PHY_INTERFACE_MODE_NA &&
474 	    state->interface != PHY_INTERFACE_MODE_MII &&
475 	    state->interface != PHY_INTERFACE_MODE_GMII &&
476 	    !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_RGMII) &&
477 	      phy_interface_mode_is_rgmii(state->interface)) &&
478 	    !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_TRGMII) &&
479 	      !mac->id && state->interface == PHY_INTERFACE_MODE_TRGMII) &&
480 	    !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_SGMII) &&
481 	      (state->interface == PHY_INTERFACE_MODE_SGMII ||
482 	       phy_interface_mode_is_8023z(state->interface)))) {
483 		linkmode_zero(supported);
484 		return;
485 	}
486 
487 	phylink_set_port_modes(mask);
488 	phylink_set(mask, Autoneg);
489 
490 	switch (state->interface) {
491 	case PHY_INTERFACE_MODE_TRGMII:
492 		phylink_set(mask, 1000baseT_Full);
493 		break;
494 	case PHY_INTERFACE_MODE_1000BASEX:
495 	case PHY_INTERFACE_MODE_2500BASEX:
496 		phylink_set(mask, 1000baseX_Full);
497 		phylink_set(mask, 2500baseX_Full);
498 		break;
499 	case PHY_INTERFACE_MODE_GMII:
500 	case PHY_INTERFACE_MODE_RGMII:
501 	case PHY_INTERFACE_MODE_RGMII_ID:
502 	case PHY_INTERFACE_MODE_RGMII_RXID:
503 	case PHY_INTERFACE_MODE_RGMII_TXID:
504 		phylink_set(mask, 1000baseT_Half);
505 		fallthrough;
506 	case PHY_INTERFACE_MODE_SGMII:
507 		phylink_set(mask, 1000baseT_Full);
508 		phylink_set(mask, 1000baseX_Full);
509 		fallthrough;
510 	case PHY_INTERFACE_MODE_MII:
511 	case PHY_INTERFACE_MODE_RMII:
512 	case PHY_INTERFACE_MODE_REVMII:
513 	case PHY_INTERFACE_MODE_NA:
514 	default:
515 		phylink_set(mask, 10baseT_Half);
516 		phylink_set(mask, 10baseT_Full);
517 		phylink_set(mask, 100baseT_Half);
518 		phylink_set(mask, 100baseT_Full);
519 		break;
520 	}
521 
522 	if (state->interface == PHY_INTERFACE_MODE_NA) {
523 		if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_SGMII)) {
524 			phylink_set(mask, 1000baseT_Full);
525 			phylink_set(mask, 1000baseX_Full);
526 			phylink_set(mask, 2500baseX_Full);
527 		}
528 		if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_RGMII)) {
529 			phylink_set(mask, 1000baseT_Full);
530 			phylink_set(mask, 1000baseT_Half);
531 			phylink_set(mask, 1000baseX_Full);
532 		}
533 		if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GEPHY)) {
534 			phylink_set(mask, 1000baseT_Full);
535 			phylink_set(mask, 1000baseT_Half);
536 		}
537 	}
538 
539 	phylink_set(mask, Pause);
540 	phylink_set(mask, Asym_Pause);
541 
542 	linkmode_and(supported, supported, mask);
543 	linkmode_and(state->advertising, state->advertising, mask);
544 
545 	/* We can only operate at 2500BaseX or 1000BaseX. If requested
546 	 * to advertise both, only report advertising at 2500BaseX.
547 	 */
548 	phylink_helper_basex_speed(state);
549 }
550 
551 static const struct phylink_mac_ops mtk_phylink_ops = {
552 	.validate = mtk_validate,
553 	.mac_pcs_get_state = mtk_mac_pcs_get_state,
554 	.mac_an_restart = mtk_mac_an_restart,
555 	.mac_config = mtk_mac_config,
556 	.mac_link_down = mtk_mac_link_down,
557 	.mac_link_up = mtk_mac_link_up,
558 };
559 
mtk_mdio_init(struct mtk_eth *eth)560 static int mtk_mdio_init(struct mtk_eth *eth)
561 {
562 	struct device_node *mii_np;
563 	int ret;
564 
565 	mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus");
566 	if (!mii_np) {
567 		dev_err(eth->dev, "no %s child node found", "mdio-bus");
568 		return -ENODEV;
569 	}
570 
571 	if (!of_device_is_available(mii_np)) {
572 		ret = -ENODEV;
573 		goto err_put_node;
574 	}
575 
576 	eth->mii_bus = devm_mdiobus_alloc(eth->dev);
577 	if (!eth->mii_bus) {
578 		ret = -ENOMEM;
579 		goto err_put_node;
580 	}
581 
582 	eth->mii_bus->name = "mdio";
583 	eth->mii_bus->read = mtk_mdio_read;
584 	eth->mii_bus->write = mtk_mdio_write;
585 	eth->mii_bus->priv = eth;
586 	eth->mii_bus->parent = eth->dev;
587 
588 	snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%pOFn", mii_np);
589 	ret = of_mdiobus_register(eth->mii_bus, mii_np);
590 
591 err_put_node:
592 	of_node_put(mii_np);
593 	return ret;
594 }
595 
mtk_mdio_cleanup(struct mtk_eth *eth)596 static void mtk_mdio_cleanup(struct mtk_eth *eth)
597 {
598 	if (!eth->mii_bus)
599 		return;
600 
601 	mdiobus_unregister(eth->mii_bus);
602 }
603 
mtk_tx_irq_disable(struct mtk_eth *eth, u32 mask)604 static inline void mtk_tx_irq_disable(struct mtk_eth *eth, u32 mask)
605 {
606 	unsigned long flags;
607 	u32 val;
608 
609 	spin_lock_irqsave(&eth->tx_irq_lock, flags);
610 	val = mtk_r32(eth, eth->tx_int_mask_reg);
611 	mtk_w32(eth, val & ~mask, eth->tx_int_mask_reg);
612 	spin_unlock_irqrestore(&eth->tx_irq_lock, flags);
613 }
614 
mtk_tx_irq_enable(struct mtk_eth *eth, u32 mask)615 static inline void mtk_tx_irq_enable(struct mtk_eth *eth, u32 mask)
616 {
617 	unsigned long flags;
618 	u32 val;
619 
620 	spin_lock_irqsave(&eth->tx_irq_lock, flags);
621 	val = mtk_r32(eth, eth->tx_int_mask_reg);
622 	mtk_w32(eth, val | mask, eth->tx_int_mask_reg);
623 	spin_unlock_irqrestore(&eth->tx_irq_lock, flags);
624 }
625 
mtk_rx_irq_disable(struct mtk_eth *eth, u32 mask)626 static inline void mtk_rx_irq_disable(struct mtk_eth *eth, u32 mask)
627 {
628 	unsigned long flags;
629 	u32 val;
630 
631 	spin_lock_irqsave(&eth->rx_irq_lock, flags);
632 	val = mtk_r32(eth, MTK_PDMA_INT_MASK);
633 	mtk_w32(eth, val & ~mask, MTK_PDMA_INT_MASK);
634 	spin_unlock_irqrestore(&eth->rx_irq_lock, flags);
635 }
636 
mtk_rx_irq_enable(struct mtk_eth *eth, u32 mask)637 static inline void mtk_rx_irq_enable(struct mtk_eth *eth, u32 mask)
638 {
639 	unsigned long flags;
640 	u32 val;
641 
642 	spin_lock_irqsave(&eth->rx_irq_lock, flags);
643 	val = mtk_r32(eth, MTK_PDMA_INT_MASK);
644 	mtk_w32(eth, val | mask, MTK_PDMA_INT_MASK);
645 	spin_unlock_irqrestore(&eth->rx_irq_lock, flags);
646 }
647 
mtk_set_mac_address(struct net_device *dev, void *p)648 static int mtk_set_mac_address(struct net_device *dev, void *p)
649 {
650 	int ret = eth_mac_addr(dev, p);
651 	struct mtk_mac *mac = netdev_priv(dev);
652 	struct mtk_eth *eth = mac->hw;
653 	const char *macaddr = dev->dev_addr;
654 
655 	if (ret)
656 		return ret;
657 
658 	if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state)))
659 		return -EBUSY;
660 
661 	spin_lock_bh(&mac->hw->page_lock);
662 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
663 		mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1],
664 			MT7628_SDM_MAC_ADRH);
665 		mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) |
666 			(macaddr[4] << 8) | macaddr[5],
667 			MT7628_SDM_MAC_ADRL);
668 	} else {
669 		mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1],
670 			MTK_GDMA_MAC_ADRH(mac->id));
671 		mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) |
672 			(macaddr[4] << 8) | macaddr[5],
673 			MTK_GDMA_MAC_ADRL(mac->id));
674 	}
675 	spin_unlock_bh(&mac->hw->page_lock);
676 
677 	return 0;
678 }
679 
mtk_stats_update_mac(struct mtk_mac *mac)680 void mtk_stats_update_mac(struct mtk_mac *mac)
681 {
682 	struct mtk_hw_stats *hw_stats = mac->hw_stats;
683 	struct mtk_eth *eth = mac->hw;
684 
685 	u64_stats_update_begin(&hw_stats->syncp);
686 
687 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
688 		hw_stats->tx_packets += mtk_r32(mac->hw, MT7628_SDM_TPCNT);
689 		hw_stats->tx_bytes += mtk_r32(mac->hw, MT7628_SDM_TBCNT);
690 		hw_stats->rx_packets += mtk_r32(mac->hw, MT7628_SDM_RPCNT);
691 		hw_stats->rx_bytes += mtk_r32(mac->hw, MT7628_SDM_RBCNT);
692 		hw_stats->rx_checksum_errors +=
693 			mtk_r32(mac->hw, MT7628_SDM_CS_ERR);
694 	} else {
695 		unsigned int offs = hw_stats->reg_offset;
696 		u64 stats;
697 
698 		hw_stats->rx_bytes += mtk_r32(mac->hw,
699 					      MTK_GDM1_RX_GBCNT_L + offs);
700 		stats = mtk_r32(mac->hw, MTK_GDM1_RX_GBCNT_H + offs);
701 		if (stats)
702 			hw_stats->rx_bytes += (stats << 32);
703 		hw_stats->rx_packets +=
704 			mtk_r32(mac->hw, MTK_GDM1_RX_GPCNT + offs);
705 		hw_stats->rx_overflow +=
706 			mtk_r32(mac->hw, MTK_GDM1_RX_OERCNT + offs);
707 		hw_stats->rx_fcs_errors +=
708 			mtk_r32(mac->hw, MTK_GDM1_RX_FERCNT + offs);
709 		hw_stats->rx_short_errors +=
710 			mtk_r32(mac->hw, MTK_GDM1_RX_SERCNT + offs);
711 		hw_stats->rx_long_errors +=
712 			mtk_r32(mac->hw, MTK_GDM1_RX_LENCNT + offs);
713 		hw_stats->rx_checksum_errors +=
714 			mtk_r32(mac->hw, MTK_GDM1_RX_CERCNT + offs);
715 		hw_stats->rx_flow_control_packets +=
716 			mtk_r32(mac->hw, MTK_GDM1_RX_FCCNT + offs);
717 		hw_stats->tx_skip +=
718 			mtk_r32(mac->hw, MTK_GDM1_TX_SKIPCNT + offs);
719 		hw_stats->tx_collisions +=
720 			mtk_r32(mac->hw, MTK_GDM1_TX_COLCNT + offs);
721 		hw_stats->tx_bytes +=
722 			mtk_r32(mac->hw, MTK_GDM1_TX_GBCNT_L + offs);
723 		stats =  mtk_r32(mac->hw, MTK_GDM1_TX_GBCNT_H + offs);
724 		if (stats)
725 			hw_stats->tx_bytes += (stats << 32);
726 		hw_stats->tx_packets +=
727 			mtk_r32(mac->hw, MTK_GDM1_TX_GPCNT + offs);
728 	}
729 
730 	u64_stats_update_end(&hw_stats->syncp);
731 }
732 
mtk_stats_update(struct mtk_eth *eth)733 static void mtk_stats_update(struct mtk_eth *eth)
734 {
735 	int i;
736 
737 	for (i = 0; i < MTK_MAC_COUNT; i++) {
738 		if (!eth->mac[i] || !eth->mac[i]->hw_stats)
739 			continue;
740 		if (spin_trylock(&eth->mac[i]->hw_stats->stats_lock)) {
741 			mtk_stats_update_mac(eth->mac[i]);
742 			spin_unlock(&eth->mac[i]->hw_stats->stats_lock);
743 		}
744 	}
745 }
746 
mtk_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *storage)747 static void mtk_get_stats64(struct net_device *dev,
748 			    struct rtnl_link_stats64 *storage)
749 {
750 	struct mtk_mac *mac = netdev_priv(dev);
751 	struct mtk_hw_stats *hw_stats = mac->hw_stats;
752 	unsigned int start;
753 
754 	if (netif_running(dev) && netif_device_present(dev)) {
755 		if (spin_trylock_bh(&hw_stats->stats_lock)) {
756 			mtk_stats_update_mac(mac);
757 			spin_unlock_bh(&hw_stats->stats_lock);
758 		}
759 	}
760 
761 	do {
762 		start = u64_stats_fetch_begin_irq(&hw_stats->syncp);
763 		storage->rx_packets = hw_stats->rx_packets;
764 		storage->tx_packets = hw_stats->tx_packets;
765 		storage->rx_bytes = hw_stats->rx_bytes;
766 		storage->tx_bytes = hw_stats->tx_bytes;
767 		storage->collisions = hw_stats->tx_collisions;
768 		storage->rx_length_errors = hw_stats->rx_short_errors +
769 			hw_stats->rx_long_errors;
770 		storage->rx_over_errors = hw_stats->rx_overflow;
771 		storage->rx_crc_errors = hw_stats->rx_fcs_errors;
772 		storage->rx_errors = hw_stats->rx_checksum_errors;
773 		storage->tx_aborted_errors = hw_stats->tx_skip;
774 	} while (u64_stats_fetch_retry_irq(&hw_stats->syncp, start));
775 
776 	storage->tx_errors = dev->stats.tx_errors;
777 	storage->rx_dropped = dev->stats.rx_dropped;
778 	storage->tx_dropped = dev->stats.tx_dropped;
779 }
780 
mtk_max_frag_size(int mtu)781 static inline int mtk_max_frag_size(int mtu)
782 {
783 	/* make sure buf_size will be at least MTK_MAX_RX_LENGTH */
784 	if (mtu + MTK_RX_ETH_HLEN < MTK_MAX_RX_LENGTH)
785 		mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN;
786 
787 	return SKB_DATA_ALIGN(MTK_RX_HLEN + mtu) +
788 		SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
789 }
790 
mtk_max_buf_size(int frag_size)791 static inline int mtk_max_buf_size(int frag_size)
792 {
793 	int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN -
794 		       SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
795 
796 	WARN_ON(buf_size < MTK_MAX_RX_LENGTH);
797 
798 	return buf_size;
799 }
800 
mtk_rx_get_desc(struct mtk_rx_dma *rxd, struct mtk_rx_dma *dma_rxd)801 static inline void mtk_rx_get_desc(struct mtk_rx_dma *rxd,
802 				   struct mtk_rx_dma *dma_rxd)
803 {
804 	rxd->rxd1 = READ_ONCE(dma_rxd->rxd1);
805 	rxd->rxd2 = READ_ONCE(dma_rxd->rxd2);
806 	rxd->rxd3 = READ_ONCE(dma_rxd->rxd3);
807 	rxd->rxd4 = READ_ONCE(dma_rxd->rxd4);
808 }
809 
mtk_max_lro_buf_alloc(gfp_t gfp_mask)810 static void *mtk_max_lro_buf_alloc(gfp_t gfp_mask)
811 {
812 	unsigned int size = mtk_max_frag_size(MTK_MAX_LRO_RX_LENGTH);
813 	unsigned long data;
814 
815 	data = __get_free_pages(gfp_mask | __GFP_COMP | __GFP_NOWARN,
816 				get_order(size));
817 
818 	return (void *)data;
819 }
820 
821 /* the qdma core needs scratch memory to be setup */
mtk_init_fq_dma(struct mtk_eth *eth)822 static int mtk_init_fq_dma(struct mtk_eth *eth)
823 {
824 	dma_addr_t phy_ring_tail;
825 	int cnt = MTK_DMA_SIZE;
826 	dma_addr_t dma_addr;
827 	int i;
828 
829 	eth->scratch_ring = dma_alloc_coherent(eth->dev,
830 					       cnt * sizeof(struct mtk_tx_dma),
831 					       &eth->phy_scratch_ring,
832 					       GFP_ATOMIC);
833 	if (unlikely(!eth->scratch_ring))
834 		return -ENOMEM;
835 
836 	eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE,
837 				    GFP_KERNEL);
838 	if (unlikely(!eth->scratch_head))
839 		return -ENOMEM;
840 
841 	dma_addr = dma_map_single(eth->dev,
842 				  eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE,
843 				  DMA_FROM_DEVICE);
844 	if (unlikely(dma_mapping_error(eth->dev, dma_addr)))
845 		return -ENOMEM;
846 
847 	phy_ring_tail = eth->phy_scratch_ring +
848 			(sizeof(struct mtk_tx_dma) * (cnt - 1));
849 
850 	for (i = 0; i < cnt; i++) {
851 		eth->scratch_ring[i].txd1 =
852 					(dma_addr + (i * MTK_QDMA_PAGE_SIZE));
853 		if (i < cnt - 1)
854 			eth->scratch_ring[i].txd2 = (eth->phy_scratch_ring +
855 				((i + 1) * sizeof(struct mtk_tx_dma)));
856 		eth->scratch_ring[i].txd3 = TX_DMA_SDL(MTK_QDMA_PAGE_SIZE);
857 	}
858 
859 	mtk_w32(eth, eth->phy_scratch_ring, MTK_QDMA_FQ_HEAD);
860 	mtk_w32(eth, phy_ring_tail, MTK_QDMA_FQ_TAIL);
861 	mtk_w32(eth, (cnt << 16) | cnt, MTK_QDMA_FQ_CNT);
862 	mtk_w32(eth, MTK_QDMA_PAGE_SIZE << 16, MTK_QDMA_FQ_BLEN);
863 
864 	return 0;
865 }
866 
mtk_qdma_phys_to_virt(struct mtk_tx_ring *ring, u32 desc)867 static inline void *mtk_qdma_phys_to_virt(struct mtk_tx_ring *ring, u32 desc)
868 {
869 	void *ret = ring->dma;
870 
871 	return ret + (desc - ring->phys);
872 }
873 
mtk_desc_to_tx_buf(struct mtk_tx_ring *ring, struct mtk_tx_dma *txd)874 static inline struct mtk_tx_buf *mtk_desc_to_tx_buf(struct mtk_tx_ring *ring,
875 						    struct mtk_tx_dma *txd)
876 {
877 	int idx = txd - ring->dma;
878 
879 	return &ring->buf[idx];
880 }
881 
qdma_to_pdma(struct mtk_tx_ring *ring, struct mtk_tx_dma *dma)882 static struct mtk_tx_dma *qdma_to_pdma(struct mtk_tx_ring *ring,
883 				       struct mtk_tx_dma *dma)
884 {
885 	return ring->dma_pdma - ring->dma + dma;
886 }
887 
txd_to_idx(struct mtk_tx_ring *ring, struct mtk_tx_dma *dma)888 static int txd_to_idx(struct mtk_tx_ring *ring, struct mtk_tx_dma *dma)
889 {
890 	return ((void *)dma - (void *)ring->dma) / sizeof(*dma);
891 }
892 
mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf)893 static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf)
894 {
895 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
896 		if (tx_buf->flags & MTK_TX_FLAGS_SINGLE0) {
897 			dma_unmap_single(eth->dev,
898 					 dma_unmap_addr(tx_buf, dma_addr0),
899 					 dma_unmap_len(tx_buf, dma_len0),
900 					 DMA_TO_DEVICE);
901 		} else if (tx_buf->flags & MTK_TX_FLAGS_PAGE0) {
902 			dma_unmap_page(eth->dev,
903 				       dma_unmap_addr(tx_buf, dma_addr0),
904 				       dma_unmap_len(tx_buf, dma_len0),
905 				       DMA_TO_DEVICE);
906 		}
907 	} else {
908 		if (dma_unmap_len(tx_buf, dma_len0)) {
909 			dma_unmap_page(eth->dev,
910 				       dma_unmap_addr(tx_buf, dma_addr0),
911 				       dma_unmap_len(tx_buf, dma_len0),
912 				       DMA_TO_DEVICE);
913 		}
914 
915 		if (dma_unmap_len(tx_buf, dma_len1)) {
916 			dma_unmap_page(eth->dev,
917 				       dma_unmap_addr(tx_buf, dma_addr1),
918 				       dma_unmap_len(tx_buf, dma_len1),
919 				       DMA_TO_DEVICE);
920 		}
921 	}
922 
923 	tx_buf->flags = 0;
924 	if (tx_buf->skb &&
925 	    (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC))
926 		dev_kfree_skb_any(tx_buf->skb);
927 	tx_buf->skb = NULL;
928 }
929 
setup_tx_buf(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf, struct mtk_tx_dma *txd, dma_addr_t mapped_addr, size_t size, int idx)930 static void setup_tx_buf(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf,
931 			 struct mtk_tx_dma *txd, dma_addr_t mapped_addr,
932 			 size_t size, int idx)
933 {
934 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
935 		dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr);
936 		dma_unmap_len_set(tx_buf, dma_len0, size);
937 	} else {
938 		if (idx & 1) {
939 			txd->txd3 = mapped_addr;
940 			txd->txd2 |= TX_DMA_PLEN1(size);
941 			dma_unmap_addr_set(tx_buf, dma_addr1, mapped_addr);
942 			dma_unmap_len_set(tx_buf, dma_len1, size);
943 		} else {
944 			tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC;
945 			txd->txd1 = mapped_addr;
946 			txd->txd2 = TX_DMA_PLEN0(size);
947 			dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr);
948 			dma_unmap_len_set(tx_buf, dma_len0, size);
949 		}
950 	}
951 }
952 
mtk_tx_map(struct sk_buff *skb, struct net_device *dev, int tx_num, struct mtk_tx_ring *ring, bool gso)953 static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev,
954 		      int tx_num, struct mtk_tx_ring *ring, bool gso)
955 {
956 	struct mtk_mac *mac = netdev_priv(dev);
957 	struct mtk_eth *eth = mac->hw;
958 	struct mtk_tx_dma *itxd, *txd;
959 	struct mtk_tx_dma *itxd_pdma, *txd_pdma;
960 	struct mtk_tx_buf *itx_buf, *tx_buf;
961 	dma_addr_t mapped_addr;
962 	unsigned int nr_frags;
963 	int i, n_desc = 1;
964 	u32 txd4 = 0, fport;
965 	int k = 0;
966 
967 	itxd = ring->next_free;
968 	itxd_pdma = qdma_to_pdma(ring, itxd);
969 	if (itxd == ring->last_free)
970 		return -ENOMEM;
971 
972 	/* set the forward port */
973 	fport = (mac->id + 1) << TX_DMA_FPORT_SHIFT;
974 	txd4 |= fport;
975 
976 	itx_buf = mtk_desc_to_tx_buf(ring, itxd);
977 	memset(itx_buf, 0, sizeof(*itx_buf));
978 
979 	if (gso)
980 		txd4 |= TX_DMA_TSO;
981 
982 	/* TX Checksum offload */
983 	if (skb->ip_summed == CHECKSUM_PARTIAL)
984 		txd4 |= TX_DMA_CHKSUM;
985 
986 	/* VLAN header offload */
987 	if (skb_vlan_tag_present(skb))
988 		txd4 |= TX_DMA_INS_VLAN | skb_vlan_tag_get(skb);
989 
990 	mapped_addr = dma_map_single(eth->dev, skb->data,
991 				     skb_headlen(skb), DMA_TO_DEVICE);
992 	if (unlikely(dma_mapping_error(eth->dev, mapped_addr)))
993 		return -ENOMEM;
994 
995 	WRITE_ONCE(itxd->txd1, mapped_addr);
996 	itx_buf->flags |= MTK_TX_FLAGS_SINGLE0;
997 	itx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 :
998 			  MTK_TX_FLAGS_FPORT1;
999 	setup_tx_buf(eth, itx_buf, itxd_pdma, mapped_addr, skb_headlen(skb),
1000 		     k++);
1001 
1002 	/* TX SG offload */
1003 	txd = itxd;
1004 	txd_pdma = qdma_to_pdma(ring, txd);
1005 	nr_frags = skb_shinfo(skb)->nr_frags;
1006 
1007 	for (i = 0; i < nr_frags; i++) {
1008 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1009 		unsigned int offset = 0;
1010 		int frag_size = skb_frag_size(frag);
1011 
1012 		while (frag_size) {
1013 			bool last_frag = false;
1014 			unsigned int frag_map_size;
1015 			bool new_desc = true;
1016 
1017 			if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA) ||
1018 			    (i & 0x1)) {
1019 				txd = mtk_qdma_phys_to_virt(ring, txd->txd2);
1020 				txd_pdma = qdma_to_pdma(ring, txd);
1021 				if (txd == ring->last_free)
1022 					goto err_dma;
1023 
1024 				n_desc++;
1025 			} else {
1026 				new_desc = false;
1027 			}
1028 
1029 
1030 			frag_map_size = min(frag_size, MTK_TX_DMA_BUF_LEN);
1031 			mapped_addr = skb_frag_dma_map(eth->dev, frag, offset,
1032 						       frag_map_size,
1033 						       DMA_TO_DEVICE);
1034 			if (unlikely(dma_mapping_error(eth->dev, mapped_addr)))
1035 				goto err_dma;
1036 
1037 			if (i == nr_frags - 1 &&
1038 			    (frag_size - frag_map_size) == 0)
1039 				last_frag = true;
1040 
1041 			WRITE_ONCE(txd->txd1, mapped_addr);
1042 			WRITE_ONCE(txd->txd3, (TX_DMA_SWC |
1043 					       TX_DMA_PLEN0(frag_map_size) |
1044 					       last_frag * TX_DMA_LS0));
1045 			WRITE_ONCE(txd->txd4, fport);
1046 
1047 			tx_buf = mtk_desc_to_tx_buf(ring, txd);
1048 			if (new_desc)
1049 				memset(tx_buf, 0, sizeof(*tx_buf));
1050 			tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC;
1051 			tx_buf->flags |= MTK_TX_FLAGS_PAGE0;
1052 			tx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 :
1053 					 MTK_TX_FLAGS_FPORT1;
1054 
1055 			setup_tx_buf(eth, tx_buf, txd_pdma, mapped_addr,
1056 				     frag_map_size, k++);
1057 
1058 			frag_size -= frag_map_size;
1059 			offset += frag_map_size;
1060 		}
1061 	}
1062 
1063 	/* store skb to cleanup */
1064 	itx_buf->skb = skb;
1065 
1066 	WRITE_ONCE(itxd->txd4, txd4);
1067 	WRITE_ONCE(itxd->txd3, (TX_DMA_SWC | TX_DMA_PLEN0(skb_headlen(skb)) |
1068 				(!nr_frags * TX_DMA_LS0)));
1069 	if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
1070 		if (k & 0x1)
1071 			txd_pdma->txd2 |= TX_DMA_LS0;
1072 		else
1073 			txd_pdma->txd2 |= TX_DMA_LS1;
1074 	}
1075 
1076 	netdev_sent_queue(dev, skb->len);
1077 	skb_tx_timestamp(skb);
1078 
1079 	ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2);
1080 	atomic_sub(n_desc, &ring->free_count);
1081 
1082 	/* make sure that all changes to the dma ring are flushed before we
1083 	 * continue
1084 	 */
1085 	wmb();
1086 
1087 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
1088 		if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) ||
1089 		    !netdev_xmit_more())
1090 			mtk_w32(eth, txd->txd2, MTK_QTX_CTX_PTR);
1091 	} else {
1092 		int next_idx = NEXT_DESP_IDX(txd_to_idx(ring, txd),
1093 					     ring->dma_size);
1094 		mtk_w32(eth, next_idx, MT7628_TX_CTX_IDX0);
1095 	}
1096 
1097 	return 0;
1098 
1099 err_dma:
1100 	do {
1101 		tx_buf = mtk_desc_to_tx_buf(ring, itxd);
1102 
1103 		/* unmap dma */
1104 		mtk_tx_unmap(eth, tx_buf);
1105 
1106 		itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU;
1107 		if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA))
1108 			itxd_pdma->txd2 = TX_DMA_DESP2_DEF;
1109 
1110 		itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2);
1111 		itxd_pdma = qdma_to_pdma(ring, itxd);
1112 	} while (itxd != txd);
1113 
1114 	return -ENOMEM;
1115 }
1116 
mtk_cal_txd_req(struct sk_buff *skb)1117 static inline int mtk_cal_txd_req(struct sk_buff *skb)
1118 {
1119 	int i, nfrags;
1120 	skb_frag_t *frag;
1121 
1122 	nfrags = 1;
1123 	if (skb_is_gso(skb)) {
1124 		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1125 			frag = &skb_shinfo(skb)->frags[i];
1126 			nfrags += DIV_ROUND_UP(skb_frag_size(frag),
1127 						MTK_TX_DMA_BUF_LEN);
1128 		}
1129 	} else {
1130 		nfrags += skb_shinfo(skb)->nr_frags;
1131 	}
1132 
1133 	return nfrags;
1134 }
1135 
mtk_queue_stopped(struct mtk_eth *eth)1136 static int mtk_queue_stopped(struct mtk_eth *eth)
1137 {
1138 	int i;
1139 
1140 	for (i = 0; i < MTK_MAC_COUNT; i++) {
1141 		if (!eth->netdev[i])
1142 			continue;
1143 		if (netif_queue_stopped(eth->netdev[i]))
1144 			return 1;
1145 	}
1146 
1147 	return 0;
1148 }
1149 
mtk_wake_queue(struct mtk_eth *eth)1150 static void mtk_wake_queue(struct mtk_eth *eth)
1151 {
1152 	int i;
1153 
1154 	for (i = 0; i < MTK_MAC_COUNT; i++) {
1155 		if (!eth->netdev[i])
1156 			continue;
1157 		netif_wake_queue(eth->netdev[i]);
1158 	}
1159 }
1160 
mtk_stop_queue(struct mtk_eth *eth)1161 static void mtk_stop_queue(struct mtk_eth *eth)
1162 {
1163 	int i;
1164 
1165 	for (i = 0; i < MTK_MAC_COUNT; i++) {
1166 		if (!eth->netdev[i])
1167 			continue;
1168 		netif_stop_queue(eth->netdev[i]);
1169 	}
1170 }
1171 
mtk_start_xmit(struct sk_buff *skb, struct net_device *dev)1172 static netdev_tx_t mtk_start_xmit(struct sk_buff *skb, struct net_device *dev)
1173 {
1174 	struct mtk_mac *mac = netdev_priv(dev);
1175 	struct mtk_eth *eth = mac->hw;
1176 	struct mtk_tx_ring *ring = &eth->tx_ring;
1177 	struct net_device_stats *stats = &dev->stats;
1178 	bool gso = false;
1179 	int tx_num;
1180 
1181 	/* normally we can rely on the stack not calling this more than once,
1182 	 * however we have 2 queues running on the same ring so we need to lock
1183 	 * the ring access
1184 	 */
1185 	spin_lock(&eth->page_lock);
1186 
1187 	if (unlikely(test_bit(MTK_RESETTING, &eth->state)))
1188 		goto drop;
1189 
1190 	tx_num = mtk_cal_txd_req(skb);
1191 	if (unlikely(atomic_read(&ring->free_count) <= tx_num)) {
1192 		mtk_stop_queue(eth);
1193 		netif_err(eth, tx_queued, dev,
1194 			  "Tx Ring full when queue awake!\n");
1195 		spin_unlock(&eth->page_lock);
1196 		return NETDEV_TX_BUSY;
1197 	}
1198 
1199 	/* TSO: fill MSS info in tcp checksum field */
1200 	if (skb_is_gso(skb)) {
1201 		if (skb_cow_head(skb, 0)) {
1202 			netif_warn(eth, tx_err, dev,
1203 				   "GSO expand head fail.\n");
1204 			goto drop;
1205 		}
1206 
1207 		if (skb_shinfo(skb)->gso_type &
1208 				(SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
1209 			gso = true;
1210 			tcp_hdr(skb)->check = htons(skb_shinfo(skb)->gso_size);
1211 		}
1212 	}
1213 
1214 	if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0)
1215 		goto drop;
1216 
1217 	if (unlikely(atomic_read(&ring->free_count) <= ring->thresh))
1218 		mtk_stop_queue(eth);
1219 
1220 	spin_unlock(&eth->page_lock);
1221 
1222 	return NETDEV_TX_OK;
1223 
1224 drop:
1225 	spin_unlock(&eth->page_lock);
1226 	stats->tx_dropped++;
1227 	dev_kfree_skb_any(skb);
1228 	return NETDEV_TX_OK;
1229 }
1230 
mtk_get_rx_ring(struct mtk_eth *eth)1231 static struct mtk_rx_ring *mtk_get_rx_ring(struct mtk_eth *eth)
1232 {
1233 	int i;
1234 	struct mtk_rx_ring *ring;
1235 	int idx;
1236 
1237 	if (!eth->hwlro)
1238 		return &eth->rx_ring[0];
1239 
1240 	for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) {
1241 		ring = &eth->rx_ring[i];
1242 		idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size);
1243 		if (ring->dma[idx].rxd2 & RX_DMA_DONE) {
1244 			ring->calc_idx_update = true;
1245 			return ring;
1246 		}
1247 	}
1248 
1249 	return NULL;
1250 }
1251 
mtk_update_rx_cpu_idx(struct mtk_eth *eth)1252 static void mtk_update_rx_cpu_idx(struct mtk_eth *eth)
1253 {
1254 	struct mtk_rx_ring *ring;
1255 	int i;
1256 
1257 	if (!eth->hwlro) {
1258 		ring = &eth->rx_ring[0];
1259 		mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg);
1260 	} else {
1261 		for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) {
1262 			ring = &eth->rx_ring[i];
1263 			if (ring->calc_idx_update) {
1264 				ring->calc_idx_update = false;
1265 				mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg);
1266 			}
1267 		}
1268 	}
1269 }
1270 
mtk_poll_rx(struct napi_struct *napi, int budget, struct mtk_eth *eth)1271 static int mtk_poll_rx(struct napi_struct *napi, int budget,
1272 		       struct mtk_eth *eth)
1273 {
1274 	struct mtk_rx_ring *ring;
1275 	int idx;
1276 	struct sk_buff *skb;
1277 	u8 *data, *new_data;
1278 	struct mtk_rx_dma *rxd, trxd;
1279 	int done = 0;
1280 
1281 	while (done < budget) {
1282 		struct net_device *netdev;
1283 		unsigned int pktlen;
1284 		dma_addr_t dma_addr;
1285 		int mac;
1286 
1287 		ring = mtk_get_rx_ring(eth);
1288 		if (unlikely(!ring))
1289 			goto rx_done;
1290 
1291 		idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size);
1292 		rxd = &ring->dma[idx];
1293 		data = ring->data[idx];
1294 
1295 		mtk_rx_get_desc(&trxd, rxd);
1296 		if (!(trxd.rxd2 & RX_DMA_DONE))
1297 			break;
1298 
1299 		/* find out which mac the packet come from. values start at 1 */
1300 		if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
1301 			mac = 0;
1302 		} else {
1303 			mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) &
1304 				RX_DMA_FPORT_MASK;
1305 			mac--;
1306 		}
1307 
1308 		if (unlikely(mac < 0 || mac >= MTK_MAC_COUNT ||
1309 			     !eth->netdev[mac]))
1310 			goto release_desc;
1311 
1312 		netdev = eth->netdev[mac];
1313 
1314 		if (unlikely(test_bit(MTK_RESETTING, &eth->state)))
1315 			goto release_desc;
1316 
1317 		/* alloc new buffer */
1318 		if (ring->frag_size <= PAGE_SIZE)
1319 			new_data = napi_alloc_frag(ring->frag_size);
1320 		else
1321 			new_data = mtk_max_lro_buf_alloc(GFP_ATOMIC);
1322 		if (unlikely(!new_data)) {
1323 			netdev->stats.rx_dropped++;
1324 			goto release_desc;
1325 		}
1326 		dma_addr = dma_map_single(eth->dev,
1327 					  new_data + NET_SKB_PAD +
1328 					  eth->ip_align,
1329 					  ring->buf_size,
1330 					  DMA_FROM_DEVICE);
1331 		if (unlikely(dma_mapping_error(eth->dev, dma_addr))) {
1332 			skb_free_frag(new_data);
1333 			netdev->stats.rx_dropped++;
1334 			goto release_desc;
1335 		}
1336 
1337 		/* receive data */
1338 		skb = build_skb(data, ring->frag_size);
1339 		if (unlikely(!skb)) {
1340 			skb_free_frag(new_data);
1341 			netdev->stats.rx_dropped++;
1342 			goto release_desc;
1343 		}
1344 		skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
1345 
1346 		dma_unmap_single(eth->dev, trxd.rxd1,
1347 				 ring->buf_size, DMA_FROM_DEVICE);
1348 		pktlen = RX_DMA_GET_PLEN0(trxd.rxd2);
1349 		skb->dev = netdev;
1350 		skb_put(skb, pktlen);
1351 		if (trxd.rxd4 & eth->rx_dma_l4_valid)
1352 			skb->ip_summed = CHECKSUM_UNNECESSARY;
1353 		else
1354 			skb_checksum_none_assert(skb);
1355 		skb->protocol = eth_type_trans(skb, netdev);
1356 
1357 		if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX &&
1358 		    (trxd.rxd2 & RX_DMA_VTAG))
1359 			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1360 					       RX_DMA_VID(trxd.rxd3));
1361 		skb_record_rx_queue(skb, 0);
1362 		napi_gro_receive(napi, skb);
1363 
1364 		ring->data[idx] = new_data;
1365 		rxd->rxd1 = (unsigned int)dma_addr;
1366 
1367 release_desc:
1368 		if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
1369 			rxd->rxd2 = RX_DMA_LSO;
1370 		else
1371 			rxd->rxd2 = RX_DMA_PLEN0(ring->buf_size);
1372 
1373 		ring->calc_idx = idx;
1374 
1375 		done++;
1376 	}
1377 
1378 rx_done:
1379 	if (done) {
1380 		/* make sure that all changes to the dma ring are flushed before
1381 		 * we continue
1382 		 */
1383 		wmb();
1384 		mtk_update_rx_cpu_idx(eth);
1385 	}
1386 
1387 	return done;
1388 }
1389 
mtk_poll_tx_qdma(struct mtk_eth *eth, int budget, unsigned int *done, unsigned int *bytes)1390 static int mtk_poll_tx_qdma(struct mtk_eth *eth, int budget,
1391 			    unsigned int *done, unsigned int *bytes)
1392 {
1393 	struct mtk_tx_ring *ring = &eth->tx_ring;
1394 	struct mtk_tx_dma *desc;
1395 	struct sk_buff *skb;
1396 	struct mtk_tx_buf *tx_buf;
1397 	u32 cpu, dma;
1398 
1399 	cpu = mtk_r32(eth, MTK_QTX_CRX_PTR);
1400 	dma = mtk_r32(eth, MTK_QTX_DRX_PTR);
1401 
1402 	desc = mtk_qdma_phys_to_virt(ring, cpu);
1403 
1404 	while ((cpu != dma) && budget) {
1405 		u32 next_cpu = desc->txd2;
1406 		int mac = 0;
1407 
1408 		desc = mtk_qdma_phys_to_virt(ring, desc->txd2);
1409 		if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0)
1410 			break;
1411 
1412 		tx_buf = mtk_desc_to_tx_buf(ring, desc);
1413 		if (tx_buf->flags & MTK_TX_FLAGS_FPORT1)
1414 			mac = 1;
1415 
1416 		skb = tx_buf->skb;
1417 		if (!skb)
1418 			break;
1419 
1420 		if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) {
1421 			bytes[mac] += skb->len;
1422 			done[mac]++;
1423 			budget--;
1424 		}
1425 		mtk_tx_unmap(eth, tx_buf);
1426 
1427 		ring->last_free = desc;
1428 		atomic_inc(&ring->free_count);
1429 
1430 		cpu = next_cpu;
1431 	}
1432 
1433 	mtk_w32(eth, cpu, MTK_QTX_CRX_PTR);
1434 
1435 	return budget;
1436 }
1437 
mtk_poll_tx_pdma(struct mtk_eth *eth, int budget, unsigned int *done, unsigned int *bytes)1438 static int mtk_poll_tx_pdma(struct mtk_eth *eth, int budget,
1439 			    unsigned int *done, unsigned int *bytes)
1440 {
1441 	struct mtk_tx_ring *ring = &eth->tx_ring;
1442 	struct mtk_tx_dma *desc;
1443 	struct sk_buff *skb;
1444 	struct mtk_tx_buf *tx_buf;
1445 	u32 cpu, dma;
1446 
1447 	cpu = ring->cpu_idx;
1448 	dma = mtk_r32(eth, MT7628_TX_DTX_IDX0);
1449 
1450 	while ((cpu != dma) && budget) {
1451 		tx_buf = &ring->buf[cpu];
1452 		skb = tx_buf->skb;
1453 		if (!skb)
1454 			break;
1455 
1456 		if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) {
1457 			bytes[0] += skb->len;
1458 			done[0]++;
1459 			budget--;
1460 		}
1461 
1462 		mtk_tx_unmap(eth, tx_buf);
1463 
1464 		desc = &ring->dma[cpu];
1465 		ring->last_free = desc;
1466 		atomic_inc(&ring->free_count);
1467 
1468 		cpu = NEXT_DESP_IDX(cpu, ring->dma_size);
1469 	}
1470 
1471 	ring->cpu_idx = cpu;
1472 
1473 	return budget;
1474 }
1475 
mtk_poll_tx(struct mtk_eth *eth, int budget)1476 static int mtk_poll_tx(struct mtk_eth *eth, int budget)
1477 {
1478 	struct mtk_tx_ring *ring = &eth->tx_ring;
1479 	unsigned int done[MTK_MAX_DEVS];
1480 	unsigned int bytes[MTK_MAX_DEVS];
1481 	int total = 0, i;
1482 
1483 	memset(done, 0, sizeof(done));
1484 	memset(bytes, 0, sizeof(bytes));
1485 
1486 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA))
1487 		budget = mtk_poll_tx_qdma(eth, budget, done, bytes);
1488 	else
1489 		budget = mtk_poll_tx_pdma(eth, budget, done, bytes);
1490 
1491 	for (i = 0; i < MTK_MAC_COUNT; i++) {
1492 		if (!eth->netdev[i] || !done[i])
1493 			continue;
1494 		netdev_completed_queue(eth->netdev[i], done[i], bytes[i]);
1495 		total += done[i];
1496 	}
1497 
1498 	if (mtk_queue_stopped(eth) &&
1499 	    (atomic_read(&ring->free_count) > ring->thresh))
1500 		mtk_wake_queue(eth);
1501 
1502 	return total;
1503 }
1504 
mtk_handle_status_irq(struct mtk_eth *eth)1505 static void mtk_handle_status_irq(struct mtk_eth *eth)
1506 {
1507 	u32 status2 = mtk_r32(eth, MTK_INT_STATUS2);
1508 
1509 	if (unlikely(status2 & (MTK_GDM1_AF | MTK_GDM2_AF))) {
1510 		mtk_stats_update(eth);
1511 		mtk_w32(eth, (MTK_GDM1_AF | MTK_GDM2_AF),
1512 			MTK_INT_STATUS2);
1513 	}
1514 }
1515 
mtk_napi_tx(struct napi_struct *napi, int budget)1516 static int mtk_napi_tx(struct napi_struct *napi, int budget)
1517 {
1518 	struct mtk_eth *eth = container_of(napi, struct mtk_eth, tx_napi);
1519 	u32 status, mask;
1520 	int tx_done = 0;
1521 
1522 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA))
1523 		mtk_handle_status_irq(eth);
1524 	mtk_w32(eth, MTK_TX_DONE_INT, eth->tx_int_status_reg);
1525 	tx_done = mtk_poll_tx(eth, budget);
1526 
1527 	if (unlikely(netif_msg_intr(eth))) {
1528 		status = mtk_r32(eth, eth->tx_int_status_reg);
1529 		mask = mtk_r32(eth, eth->tx_int_mask_reg);
1530 		dev_info(eth->dev,
1531 			 "done tx %d, intr 0x%08x/0x%x\n",
1532 			 tx_done, status, mask);
1533 	}
1534 
1535 	if (tx_done == budget)
1536 		return budget;
1537 
1538 	status = mtk_r32(eth, eth->tx_int_status_reg);
1539 	if (status & MTK_TX_DONE_INT)
1540 		return budget;
1541 
1542 	napi_complete(napi);
1543 	mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);
1544 
1545 	return tx_done;
1546 }
1547 
mtk_napi_rx(struct napi_struct *napi, int budget)1548 static int mtk_napi_rx(struct napi_struct *napi, int budget)
1549 {
1550 	struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi);
1551 	u32 status, mask;
1552 	int rx_done = 0;
1553 	int remain_budget = budget;
1554 
1555 	mtk_handle_status_irq(eth);
1556 
1557 poll_again:
1558 	mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_STATUS);
1559 	rx_done = mtk_poll_rx(napi, remain_budget, eth);
1560 
1561 	if (unlikely(netif_msg_intr(eth))) {
1562 		status = mtk_r32(eth, MTK_PDMA_INT_STATUS);
1563 		mask = mtk_r32(eth, MTK_PDMA_INT_MASK);
1564 		dev_info(eth->dev,
1565 			 "done rx %d, intr 0x%08x/0x%x\n",
1566 			 rx_done, status, mask);
1567 	}
1568 	if (rx_done == remain_budget)
1569 		return budget;
1570 
1571 	status = mtk_r32(eth, MTK_PDMA_INT_STATUS);
1572 	if (status & MTK_RX_DONE_INT) {
1573 		remain_budget -= rx_done;
1574 		goto poll_again;
1575 	}
1576 	napi_complete(napi);
1577 	mtk_rx_irq_enable(eth, MTK_RX_DONE_INT);
1578 
1579 	return rx_done + budget - remain_budget;
1580 }
1581 
mtk_tx_alloc(struct mtk_eth *eth)1582 static int mtk_tx_alloc(struct mtk_eth *eth)
1583 {
1584 	struct mtk_tx_ring *ring = &eth->tx_ring;
1585 	int i, sz = sizeof(*ring->dma);
1586 
1587 	ring->buf = kcalloc(MTK_DMA_SIZE, sizeof(*ring->buf),
1588 			       GFP_KERNEL);
1589 	if (!ring->buf)
1590 		goto no_tx_mem;
1591 
1592 	ring->dma = dma_alloc_coherent(eth->dev, MTK_DMA_SIZE * sz,
1593 				       &ring->phys, GFP_ATOMIC);
1594 	if (!ring->dma)
1595 		goto no_tx_mem;
1596 
1597 	for (i = 0; i < MTK_DMA_SIZE; i++) {
1598 		int next = (i + 1) % MTK_DMA_SIZE;
1599 		u32 next_ptr = ring->phys + next * sz;
1600 
1601 		ring->dma[i].txd2 = next_ptr;
1602 		ring->dma[i].txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU;
1603 	}
1604 
1605 	/* On MT7688 (PDMA only) this driver uses the ring->dma structs
1606 	 * only as the framework. The real HW descriptors are the PDMA
1607 	 * descriptors in ring->dma_pdma.
1608 	 */
1609 	if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
1610 		ring->dma_pdma = dma_alloc_coherent(eth->dev, MTK_DMA_SIZE * sz,
1611 						    &ring->phys_pdma,
1612 						    GFP_ATOMIC);
1613 		if (!ring->dma_pdma)
1614 			goto no_tx_mem;
1615 
1616 		for (i = 0; i < MTK_DMA_SIZE; i++) {
1617 			ring->dma_pdma[i].txd2 = TX_DMA_DESP2_DEF;
1618 			ring->dma_pdma[i].txd4 = 0;
1619 		}
1620 	}
1621 
1622 	ring->dma_size = MTK_DMA_SIZE;
1623 	atomic_set(&ring->free_count, MTK_DMA_SIZE - 2);
1624 	ring->next_free = &ring->dma[0];
1625 	ring->last_free = &ring->dma[MTK_DMA_SIZE - 1];
1626 	ring->thresh = MAX_SKB_FRAGS;
1627 
1628 	/* make sure that all changes to the dma ring are flushed before we
1629 	 * continue
1630 	 */
1631 	wmb();
1632 
1633 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
1634 		mtk_w32(eth, ring->phys, MTK_QTX_CTX_PTR);
1635 		mtk_w32(eth, ring->phys, MTK_QTX_DTX_PTR);
1636 		mtk_w32(eth,
1637 			ring->phys + ((MTK_DMA_SIZE - 1) * sz),
1638 			MTK_QTX_CRX_PTR);
1639 		mtk_w32(eth,
1640 			ring->phys + ((MTK_DMA_SIZE - 1) * sz),
1641 			MTK_QTX_DRX_PTR);
1642 		mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES,
1643 			MTK_QTX_CFG(0));
1644 	} else {
1645 		mtk_w32(eth, ring->phys_pdma, MT7628_TX_BASE_PTR0);
1646 		mtk_w32(eth, MTK_DMA_SIZE, MT7628_TX_MAX_CNT0);
1647 		mtk_w32(eth, 0, MT7628_TX_CTX_IDX0);
1648 		mtk_w32(eth, MT7628_PST_DTX_IDX0, MTK_PDMA_RST_IDX);
1649 	}
1650 
1651 	return 0;
1652 
1653 no_tx_mem:
1654 	return -ENOMEM;
1655 }
1656 
mtk_tx_clean(struct mtk_eth *eth)1657 static void mtk_tx_clean(struct mtk_eth *eth)
1658 {
1659 	struct mtk_tx_ring *ring = &eth->tx_ring;
1660 	int i;
1661 
1662 	if (ring->buf) {
1663 		for (i = 0; i < MTK_DMA_SIZE; i++)
1664 			mtk_tx_unmap(eth, &ring->buf[i]);
1665 		kfree(ring->buf);
1666 		ring->buf = NULL;
1667 	}
1668 
1669 	if (ring->dma) {
1670 		dma_free_coherent(eth->dev,
1671 				  MTK_DMA_SIZE * sizeof(*ring->dma),
1672 				  ring->dma,
1673 				  ring->phys);
1674 		ring->dma = NULL;
1675 	}
1676 
1677 	if (ring->dma_pdma) {
1678 		dma_free_coherent(eth->dev,
1679 				  MTK_DMA_SIZE * sizeof(*ring->dma_pdma),
1680 				  ring->dma_pdma,
1681 				  ring->phys_pdma);
1682 		ring->dma_pdma = NULL;
1683 	}
1684 }
1685 
mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag)1686 static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag)
1687 {
1688 	struct mtk_rx_ring *ring;
1689 	int rx_data_len, rx_dma_size;
1690 	int i;
1691 	u32 offset = 0;
1692 
1693 	if (rx_flag == MTK_RX_FLAGS_QDMA) {
1694 		if (ring_no)
1695 			return -EINVAL;
1696 		ring = &eth->rx_ring_qdma;
1697 		offset = 0x1000;
1698 	} else {
1699 		ring = &eth->rx_ring[ring_no];
1700 	}
1701 
1702 	if (rx_flag == MTK_RX_FLAGS_HWLRO) {
1703 		rx_data_len = MTK_MAX_LRO_RX_LENGTH;
1704 		rx_dma_size = MTK_HW_LRO_DMA_SIZE;
1705 	} else {
1706 		rx_data_len = ETH_DATA_LEN;
1707 		rx_dma_size = MTK_DMA_SIZE;
1708 	}
1709 
1710 	ring->frag_size = mtk_max_frag_size(rx_data_len);
1711 	ring->buf_size = mtk_max_buf_size(ring->frag_size);
1712 	ring->data = kcalloc(rx_dma_size, sizeof(*ring->data),
1713 			     GFP_KERNEL);
1714 	if (!ring->data)
1715 		return -ENOMEM;
1716 
1717 	for (i = 0; i < rx_dma_size; i++) {
1718 		if (ring->frag_size <= PAGE_SIZE)
1719 			ring->data[i] = netdev_alloc_frag(ring->frag_size);
1720 		else
1721 			ring->data[i] = mtk_max_lro_buf_alloc(GFP_KERNEL);
1722 		if (!ring->data[i])
1723 			return -ENOMEM;
1724 	}
1725 
1726 	ring->dma = dma_alloc_coherent(eth->dev,
1727 				       rx_dma_size * sizeof(*ring->dma),
1728 				       &ring->phys, GFP_ATOMIC);
1729 	if (!ring->dma)
1730 		return -ENOMEM;
1731 
1732 	for (i = 0; i < rx_dma_size; i++) {
1733 		dma_addr_t dma_addr = dma_map_single(eth->dev,
1734 				ring->data[i] + NET_SKB_PAD + eth->ip_align,
1735 				ring->buf_size,
1736 				DMA_FROM_DEVICE);
1737 		if (unlikely(dma_mapping_error(eth->dev, dma_addr)))
1738 			return -ENOMEM;
1739 		ring->dma[i].rxd1 = (unsigned int)dma_addr;
1740 
1741 		if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
1742 			ring->dma[i].rxd2 = RX_DMA_LSO;
1743 		else
1744 			ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size);
1745 	}
1746 	ring->dma_size = rx_dma_size;
1747 	ring->calc_idx_update = false;
1748 	ring->calc_idx = rx_dma_size - 1;
1749 	ring->crx_idx_reg = MTK_PRX_CRX_IDX_CFG(ring_no);
1750 	/* make sure that all changes to the dma ring are flushed before we
1751 	 * continue
1752 	 */
1753 	wmb();
1754 
1755 	mtk_w32(eth, ring->phys, MTK_PRX_BASE_PTR_CFG(ring_no) + offset);
1756 	mtk_w32(eth, rx_dma_size, MTK_PRX_MAX_CNT_CFG(ring_no) + offset);
1757 	mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg + offset);
1758 	mtk_w32(eth, MTK_PST_DRX_IDX_CFG(ring_no), MTK_PDMA_RST_IDX + offset);
1759 
1760 	return 0;
1761 }
1762 
mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring)1763 static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring)
1764 {
1765 	int i;
1766 
1767 	if (ring->data && ring->dma) {
1768 		for (i = 0; i < ring->dma_size; i++) {
1769 			if (!ring->data[i])
1770 				continue;
1771 			if (!ring->dma[i].rxd1)
1772 				continue;
1773 			dma_unmap_single(eth->dev,
1774 					 ring->dma[i].rxd1,
1775 					 ring->buf_size,
1776 					 DMA_FROM_DEVICE);
1777 			skb_free_frag(ring->data[i]);
1778 		}
1779 		kfree(ring->data);
1780 		ring->data = NULL;
1781 	}
1782 
1783 	if (ring->dma) {
1784 		dma_free_coherent(eth->dev,
1785 				  ring->dma_size * sizeof(*ring->dma),
1786 				  ring->dma,
1787 				  ring->phys);
1788 		ring->dma = NULL;
1789 	}
1790 }
1791 
mtk_hwlro_rx_init(struct mtk_eth *eth)1792 static int mtk_hwlro_rx_init(struct mtk_eth *eth)
1793 {
1794 	int i;
1795 	u32 ring_ctrl_dw1 = 0, ring_ctrl_dw2 = 0, ring_ctrl_dw3 = 0;
1796 	u32 lro_ctrl_dw0 = 0, lro_ctrl_dw3 = 0;
1797 
1798 	/* set LRO rings to auto-learn modes */
1799 	ring_ctrl_dw2 |= MTK_RING_AUTO_LERAN_MODE;
1800 
1801 	/* validate LRO ring */
1802 	ring_ctrl_dw2 |= MTK_RING_VLD;
1803 
1804 	/* set AGE timer (unit: 20us) */
1805 	ring_ctrl_dw2 |= MTK_RING_AGE_TIME_H;
1806 	ring_ctrl_dw1 |= MTK_RING_AGE_TIME_L;
1807 
1808 	/* set max AGG timer (unit: 20us) */
1809 	ring_ctrl_dw2 |= MTK_RING_MAX_AGG_TIME;
1810 
1811 	/* set max LRO AGG count */
1812 	ring_ctrl_dw2 |= MTK_RING_MAX_AGG_CNT_L;
1813 	ring_ctrl_dw3 |= MTK_RING_MAX_AGG_CNT_H;
1814 
1815 	for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) {
1816 		mtk_w32(eth, ring_ctrl_dw1, MTK_LRO_CTRL_DW1_CFG(i));
1817 		mtk_w32(eth, ring_ctrl_dw2, MTK_LRO_CTRL_DW2_CFG(i));
1818 		mtk_w32(eth, ring_ctrl_dw3, MTK_LRO_CTRL_DW3_CFG(i));
1819 	}
1820 
1821 	/* IPv4 checksum update enable */
1822 	lro_ctrl_dw0 |= MTK_L3_CKS_UPD_EN;
1823 
1824 	/* switch priority comparison to packet count mode */
1825 	lro_ctrl_dw0 |= MTK_LRO_ALT_PKT_CNT_MODE;
1826 
1827 	/* bandwidth threshold setting */
1828 	mtk_w32(eth, MTK_HW_LRO_BW_THRE, MTK_PDMA_LRO_CTRL_DW2);
1829 
1830 	/* auto-learn score delta setting */
1831 	mtk_w32(eth, MTK_HW_LRO_REPLACE_DELTA, MTK_PDMA_LRO_ALT_SCORE_DELTA);
1832 
1833 	/* set refresh timer for altering flows to 1 sec. (unit: 20us) */
1834 	mtk_w32(eth, (MTK_HW_LRO_TIMER_UNIT << 16) | MTK_HW_LRO_REFRESH_TIME,
1835 		MTK_PDMA_LRO_ALT_REFRESH_TIMER);
1836 
1837 	/* set HW LRO mode & the max aggregation count for rx packets */
1838 	lro_ctrl_dw3 |= MTK_ADMA_MODE | (MTK_HW_LRO_MAX_AGG_CNT & 0xff);
1839 
1840 	/* the minimal remaining room of SDL0 in RXD for lro aggregation */
1841 	lro_ctrl_dw3 |= MTK_LRO_MIN_RXD_SDL;
1842 
1843 	/* enable HW LRO */
1844 	lro_ctrl_dw0 |= MTK_LRO_EN;
1845 
1846 	mtk_w32(eth, lro_ctrl_dw3, MTK_PDMA_LRO_CTRL_DW3);
1847 	mtk_w32(eth, lro_ctrl_dw0, MTK_PDMA_LRO_CTRL_DW0);
1848 
1849 	return 0;
1850 }
1851 
mtk_hwlro_rx_uninit(struct mtk_eth *eth)1852 static void mtk_hwlro_rx_uninit(struct mtk_eth *eth)
1853 {
1854 	int i;
1855 	u32 val;
1856 
1857 	/* relinquish lro rings, flush aggregated packets */
1858 	mtk_w32(eth, MTK_LRO_RING_RELINQUISH_REQ, MTK_PDMA_LRO_CTRL_DW0);
1859 
1860 	/* wait for relinquishments done */
1861 	for (i = 0; i < 10; i++) {
1862 		val = mtk_r32(eth, MTK_PDMA_LRO_CTRL_DW0);
1863 		if (val & MTK_LRO_RING_RELINQUISH_DONE) {
1864 			msleep(20);
1865 			continue;
1866 		}
1867 		break;
1868 	}
1869 
1870 	/* invalidate lro rings */
1871 	for (i = 1; i < MTK_MAX_RX_RING_NUM; i++)
1872 		mtk_w32(eth, 0, MTK_LRO_CTRL_DW2_CFG(i));
1873 
1874 	/* disable HW LRO */
1875 	mtk_w32(eth, 0, MTK_PDMA_LRO_CTRL_DW0);
1876 }
1877 
mtk_hwlro_val_ipaddr(struct mtk_eth *eth, int idx, __be32 ip)1878 static void mtk_hwlro_val_ipaddr(struct mtk_eth *eth, int idx, __be32 ip)
1879 {
1880 	u32 reg_val;
1881 
1882 	reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx));
1883 
1884 	/* invalidate the IP setting */
1885 	mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx));
1886 
1887 	mtk_w32(eth, ip, MTK_LRO_DIP_DW0_CFG(idx));
1888 
1889 	/* validate the IP setting */
1890 	mtk_w32(eth, (reg_val | MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx));
1891 }
1892 
mtk_hwlro_inval_ipaddr(struct mtk_eth *eth, int idx)1893 static void mtk_hwlro_inval_ipaddr(struct mtk_eth *eth, int idx)
1894 {
1895 	u32 reg_val;
1896 
1897 	reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx));
1898 
1899 	/* invalidate the IP setting */
1900 	mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx));
1901 
1902 	mtk_w32(eth, 0, MTK_LRO_DIP_DW0_CFG(idx));
1903 }
1904 
mtk_hwlro_get_ip_cnt(struct mtk_mac *mac)1905 static int mtk_hwlro_get_ip_cnt(struct mtk_mac *mac)
1906 {
1907 	int cnt = 0;
1908 	int i;
1909 
1910 	for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) {
1911 		if (mac->hwlro_ip[i])
1912 			cnt++;
1913 	}
1914 
1915 	return cnt;
1916 }
1917 
mtk_hwlro_add_ipaddr(struct net_device *dev, struct ethtool_rxnfc *cmd)1918 static int mtk_hwlro_add_ipaddr(struct net_device *dev,
1919 				struct ethtool_rxnfc *cmd)
1920 {
1921 	struct ethtool_rx_flow_spec *fsp =
1922 		(struct ethtool_rx_flow_spec *)&cmd->fs;
1923 	struct mtk_mac *mac = netdev_priv(dev);
1924 	struct mtk_eth *eth = mac->hw;
1925 	int hwlro_idx;
1926 
1927 	if ((fsp->flow_type != TCP_V4_FLOW) ||
1928 	    (!fsp->h_u.tcp_ip4_spec.ip4dst) ||
1929 	    (fsp->location > 1))
1930 		return -EINVAL;
1931 
1932 	mac->hwlro_ip[fsp->location] = htonl(fsp->h_u.tcp_ip4_spec.ip4dst);
1933 	hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location;
1934 
1935 	mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac);
1936 
1937 	mtk_hwlro_val_ipaddr(eth, hwlro_idx, mac->hwlro_ip[fsp->location]);
1938 
1939 	return 0;
1940 }
1941 
mtk_hwlro_del_ipaddr(struct net_device *dev, struct ethtool_rxnfc *cmd)1942 static int mtk_hwlro_del_ipaddr(struct net_device *dev,
1943 				struct ethtool_rxnfc *cmd)
1944 {
1945 	struct ethtool_rx_flow_spec *fsp =
1946 		(struct ethtool_rx_flow_spec *)&cmd->fs;
1947 	struct mtk_mac *mac = netdev_priv(dev);
1948 	struct mtk_eth *eth = mac->hw;
1949 	int hwlro_idx;
1950 
1951 	if (fsp->location > 1)
1952 		return -EINVAL;
1953 
1954 	mac->hwlro_ip[fsp->location] = 0;
1955 	hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location;
1956 
1957 	mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac);
1958 
1959 	mtk_hwlro_inval_ipaddr(eth, hwlro_idx);
1960 
1961 	return 0;
1962 }
1963 
mtk_hwlro_netdev_disable(struct net_device *dev)1964 static void mtk_hwlro_netdev_disable(struct net_device *dev)
1965 {
1966 	struct mtk_mac *mac = netdev_priv(dev);
1967 	struct mtk_eth *eth = mac->hw;
1968 	int i, hwlro_idx;
1969 
1970 	for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) {
1971 		mac->hwlro_ip[i] = 0;
1972 		hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + i;
1973 
1974 		mtk_hwlro_inval_ipaddr(eth, hwlro_idx);
1975 	}
1976 
1977 	mac->hwlro_ip_cnt = 0;
1978 }
1979 
mtk_hwlro_get_fdir_entry(struct net_device *dev, struct ethtool_rxnfc *cmd)1980 static int mtk_hwlro_get_fdir_entry(struct net_device *dev,
1981 				    struct ethtool_rxnfc *cmd)
1982 {
1983 	struct mtk_mac *mac = netdev_priv(dev);
1984 	struct ethtool_rx_flow_spec *fsp =
1985 		(struct ethtool_rx_flow_spec *)&cmd->fs;
1986 
1987 	if (fsp->location >= ARRAY_SIZE(mac->hwlro_ip))
1988 		return -EINVAL;
1989 
1990 	/* only tcp dst ipv4 is meaningful, others are meaningless */
1991 	fsp->flow_type = TCP_V4_FLOW;
1992 	fsp->h_u.tcp_ip4_spec.ip4dst = ntohl(mac->hwlro_ip[fsp->location]);
1993 	fsp->m_u.tcp_ip4_spec.ip4dst = 0;
1994 
1995 	fsp->h_u.tcp_ip4_spec.ip4src = 0;
1996 	fsp->m_u.tcp_ip4_spec.ip4src = 0xffffffff;
1997 	fsp->h_u.tcp_ip4_spec.psrc = 0;
1998 	fsp->m_u.tcp_ip4_spec.psrc = 0xffff;
1999 	fsp->h_u.tcp_ip4_spec.pdst = 0;
2000 	fsp->m_u.tcp_ip4_spec.pdst = 0xffff;
2001 	fsp->h_u.tcp_ip4_spec.tos = 0;
2002 	fsp->m_u.tcp_ip4_spec.tos = 0xff;
2003 
2004 	return 0;
2005 }
2006 
mtk_hwlro_get_fdir_all(struct net_device *dev, struct ethtool_rxnfc *cmd, u32 *rule_locs)2007 static int mtk_hwlro_get_fdir_all(struct net_device *dev,
2008 				  struct ethtool_rxnfc *cmd,
2009 				  u32 *rule_locs)
2010 {
2011 	struct mtk_mac *mac = netdev_priv(dev);
2012 	int cnt = 0;
2013 	int i;
2014 
2015 	for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) {
2016 		if (cnt == cmd->rule_cnt)
2017 			return -EMSGSIZE;
2018 
2019 		if (mac->hwlro_ip[i]) {
2020 			rule_locs[cnt] = i;
2021 			cnt++;
2022 		}
2023 	}
2024 
2025 	cmd->rule_cnt = cnt;
2026 
2027 	return 0;
2028 }
2029 
mtk_fix_features(struct net_device *dev, netdev_features_t features)2030 static netdev_features_t mtk_fix_features(struct net_device *dev,
2031 					  netdev_features_t features)
2032 {
2033 	if (!(features & NETIF_F_LRO)) {
2034 		struct mtk_mac *mac = netdev_priv(dev);
2035 		int ip_cnt = mtk_hwlro_get_ip_cnt(mac);
2036 
2037 		if (ip_cnt) {
2038 			netdev_info(dev, "RX flow is programmed, LRO should keep on\n");
2039 
2040 			features |= NETIF_F_LRO;
2041 		}
2042 	}
2043 
2044 	return features;
2045 }
2046 
mtk_set_features(struct net_device *dev, netdev_features_t features)2047 static int mtk_set_features(struct net_device *dev, netdev_features_t features)
2048 {
2049 	int err = 0;
2050 
2051 	if (!((dev->features ^ features) & NETIF_F_LRO))
2052 		return 0;
2053 
2054 	if (!(features & NETIF_F_LRO))
2055 		mtk_hwlro_netdev_disable(dev);
2056 
2057 	return err;
2058 }
2059 
2060 /* wait for DMA to finish whatever it is doing before we start using it again */
mtk_dma_busy_wait(struct mtk_eth *eth)2061 static int mtk_dma_busy_wait(struct mtk_eth *eth)
2062 {
2063 	unsigned long t_start = jiffies;
2064 
2065 	while (1) {
2066 		if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
2067 			if (!(mtk_r32(eth, MTK_QDMA_GLO_CFG) &
2068 			      (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY)))
2069 				return 0;
2070 		} else {
2071 			if (!(mtk_r32(eth, MTK_PDMA_GLO_CFG) &
2072 			      (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY)))
2073 				return 0;
2074 		}
2075 
2076 		if (time_after(jiffies, t_start + MTK_DMA_BUSY_TIMEOUT))
2077 			break;
2078 	}
2079 
2080 	dev_err(eth->dev, "DMA init timeout\n");
2081 	return -1;
2082 }
2083 
mtk_dma_init(struct mtk_eth *eth)2084 static int mtk_dma_init(struct mtk_eth *eth)
2085 {
2086 	int err;
2087 	u32 i;
2088 
2089 	if (mtk_dma_busy_wait(eth))
2090 		return -EBUSY;
2091 
2092 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
2093 		/* QDMA needs scratch memory for internal reordering of the
2094 		 * descriptors
2095 		 */
2096 		err = mtk_init_fq_dma(eth);
2097 		if (err)
2098 			return err;
2099 	}
2100 
2101 	err = mtk_tx_alloc(eth);
2102 	if (err)
2103 		return err;
2104 
2105 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
2106 		err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_QDMA);
2107 		if (err)
2108 			return err;
2109 	}
2110 
2111 	err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_NORMAL);
2112 	if (err)
2113 		return err;
2114 
2115 	if (eth->hwlro) {
2116 		for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) {
2117 			err = mtk_rx_alloc(eth, i, MTK_RX_FLAGS_HWLRO);
2118 			if (err)
2119 				return err;
2120 		}
2121 		err = mtk_hwlro_rx_init(eth);
2122 		if (err)
2123 			return err;
2124 	}
2125 
2126 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
2127 		/* Enable random early drop and set drop threshold
2128 		 * automatically
2129 		 */
2130 		mtk_w32(eth, FC_THRES_DROP_MODE | FC_THRES_DROP_EN |
2131 			FC_THRES_MIN, MTK_QDMA_FC_THRES);
2132 		mtk_w32(eth, 0x0, MTK_QDMA_HRED2);
2133 	}
2134 
2135 	return 0;
2136 }
2137 
mtk_dma_free(struct mtk_eth *eth)2138 static void mtk_dma_free(struct mtk_eth *eth)
2139 {
2140 	int i;
2141 
2142 	for (i = 0; i < MTK_MAC_COUNT; i++)
2143 		if (eth->netdev[i])
2144 			netdev_reset_queue(eth->netdev[i]);
2145 	if (eth->scratch_ring) {
2146 		dma_free_coherent(eth->dev,
2147 				  MTK_DMA_SIZE * sizeof(struct mtk_tx_dma),
2148 				  eth->scratch_ring,
2149 				  eth->phy_scratch_ring);
2150 		eth->scratch_ring = NULL;
2151 		eth->phy_scratch_ring = 0;
2152 	}
2153 	mtk_tx_clean(eth);
2154 	mtk_rx_clean(eth, &eth->rx_ring[0]);
2155 	mtk_rx_clean(eth, &eth->rx_ring_qdma);
2156 
2157 	if (eth->hwlro) {
2158 		mtk_hwlro_rx_uninit(eth);
2159 		for (i = 1; i < MTK_MAX_RX_RING_NUM; i++)
2160 			mtk_rx_clean(eth, &eth->rx_ring[i]);
2161 	}
2162 
2163 	kfree(eth->scratch_head);
2164 }
2165 
mtk_tx_timeout(struct net_device *dev, unsigned int txqueue)2166 static void mtk_tx_timeout(struct net_device *dev, unsigned int txqueue)
2167 {
2168 	struct mtk_mac *mac = netdev_priv(dev);
2169 	struct mtk_eth *eth = mac->hw;
2170 
2171 	eth->netdev[mac->id]->stats.tx_errors++;
2172 	netif_err(eth, tx_err, dev,
2173 		  "transmit timed out\n");
2174 	schedule_work(&eth->pending_work);
2175 }
2176 
mtk_handle_irq_rx(int irq, void *_eth)2177 static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth)
2178 {
2179 	struct mtk_eth *eth = _eth;
2180 
2181 	if (likely(napi_schedule_prep(&eth->rx_napi))) {
2182 		__napi_schedule(&eth->rx_napi);
2183 		mtk_rx_irq_disable(eth, MTK_RX_DONE_INT);
2184 	}
2185 
2186 	return IRQ_HANDLED;
2187 }
2188 
mtk_handle_irq_tx(int irq, void *_eth)2189 static irqreturn_t mtk_handle_irq_tx(int irq, void *_eth)
2190 {
2191 	struct mtk_eth *eth = _eth;
2192 
2193 	if (likely(napi_schedule_prep(&eth->tx_napi))) {
2194 		__napi_schedule(&eth->tx_napi);
2195 		mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
2196 	}
2197 
2198 	return IRQ_HANDLED;
2199 }
2200 
mtk_handle_irq(int irq, void *_eth)2201 static irqreturn_t mtk_handle_irq(int irq, void *_eth)
2202 {
2203 	struct mtk_eth *eth = _eth;
2204 
2205 	if (mtk_r32(eth, MTK_PDMA_INT_MASK) & MTK_RX_DONE_INT) {
2206 		if (mtk_r32(eth, MTK_PDMA_INT_STATUS) & MTK_RX_DONE_INT)
2207 			mtk_handle_irq_rx(irq, _eth);
2208 	}
2209 	if (mtk_r32(eth, eth->tx_int_mask_reg) & MTK_TX_DONE_INT) {
2210 		if (mtk_r32(eth, eth->tx_int_status_reg) & MTK_TX_DONE_INT)
2211 			mtk_handle_irq_tx(irq, _eth);
2212 	}
2213 
2214 	return IRQ_HANDLED;
2215 }
2216 
2217 #ifdef CONFIG_NET_POLL_CONTROLLER
mtk_poll_controller(struct net_device *dev)2218 static void mtk_poll_controller(struct net_device *dev)
2219 {
2220 	struct mtk_mac *mac = netdev_priv(dev);
2221 	struct mtk_eth *eth = mac->hw;
2222 
2223 	mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
2224 	mtk_rx_irq_disable(eth, MTK_RX_DONE_INT);
2225 	mtk_handle_irq_rx(eth->irq[2], dev);
2226 	mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);
2227 	mtk_rx_irq_enable(eth, MTK_RX_DONE_INT);
2228 }
2229 #endif
2230 
mtk_start_dma(struct mtk_eth *eth)2231 static int mtk_start_dma(struct mtk_eth *eth)
2232 {
2233 	u32 rx_2b_offset = (NET_IP_ALIGN == 2) ? MTK_RX_2B_OFFSET : 0;
2234 	int err;
2235 
2236 	err = mtk_dma_init(eth);
2237 	if (err) {
2238 		mtk_dma_free(eth);
2239 		return err;
2240 	}
2241 
2242 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
2243 		mtk_w32(eth,
2244 			MTK_TX_WB_DDONE | MTK_TX_DMA_EN |
2245 			MTK_DMA_SIZE_16DWORDS | MTK_NDP_CO_PRO |
2246 			MTK_RX_DMA_EN | MTK_RX_2B_OFFSET |
2247 			MTK_RX_BT_32DWORDS,
2248 			MTK_QDMA_GLO_CFG);
2249 
2250 		mtk_w32(eth,
2251 			MTK_RX_DMA_EN | rx_2b_offset |
2252 			MTK_RX_BT_32DWORDS | MTK_MULTI_EN,
2253 			MTK_PDMA_GLO_CFG);
2254 	} else {
2255 		mtk_w32(eth, MTK_TX_WB_DDONE | MTK_TX_DMA_EN | MTK_RX_DMA_EN |
2256 			MTK_MULTI_EN | MTK_PDMA_SIZE_8DWORDS,
2257 			MTK_PDMA_GLO_CFG);
2258 	}
2259 
2260 	return 0;
2261 }
2262 
mtk_gdm_config(struct mtk_eth *eth, u32 config)2263 static void mtk_gdm_config(struct mtk_eth *eth, u32 config)
2264 {
2265 	int i;
2266 
2267 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
2268 		return;
2269 
2270 	for (i = 0; i < MTK_MAC_COUNT; i++) {
2271 		u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i));
2272 
2273 		/* default setup the forward port to send frame to PDMA */
2274 		val &= ~0xffff;
2275 
2276 		/* Enable RX checksum */
2277 		val |= MTK_GDMA_ICS_EN | MTK_GDMA_TCS_EN | MTK_GDMA_UCS_EN;
2278 
2279 		val |= config;
2280 
2281 		mtk_w32(eth, val, MTK_GDMA_FWD_CFG(i));
2282 	}
2283 	/* Reset and enable PSE */
2284 	mtk_w32(eth, RST_GL_PSE, MTK_RST_GL);
2285 	mtk_w32(eth, 0, MTK_RST_GL);
2286 }
2287 
mtk_open(struct net_device *dev)2288 static int mtk_open(struct net_device *dev)
2289 {
2290 	struct mtk_mac *mac = netdev_priv(dev);
2291 	struct mtk_eth *eth = mac->hw;
2292 	int err;
2293 
2294 	err = phylink_of_phy_connect(mac->phylink, mac->of_node, 0);
2295 	if (err) {
2296 		netdev_err(dev, "%s: could not attach PHY: %d\n", __func__,
2297 			   err);
2298 		return err;
2299 	}
2300 
2301 	/* we run 2 netdevs on the same dma ring so we only bring it up once */
2302 	if (!refcount_read(&eth->dma_refcnt)) {
2303 		int err = mtk_start_dma(eth);
2304 
2305 		if (err) {
2306 			phylink_disconnect_phy(mac->phylink);
2307 			return err;
2308 		}
2309 
2310 		mtk_gdm_config(eth, MTK_GDMA_TO_PDMA);
2311 
2312 		napi_enable(&eth->tx_napi);
2313 		napi_enable(&eth->rx_napi);
2314 		mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);
2315 		mtk_rx_irq_enable(eth, MTK_RX_DONE_INT);
2316 		refcount_set(&eth->dma_refcnt, 1);
2317 	}
2318 	else
2319 		refcount_inc(&eth->dma_refcnt);
2320 
2321 	phylink_start(mac->phylink);
2322 	netif_start_queue(dev);
2323 	return 0;
2324 }
2325 
mtk_stop_dma(struct mtk_eth *eth, u32 glo_cfg)2326 static void mtk_stop_dma(struct mtk_eth *eth, u32 glo_cfg)
2327 {
2328 	u32 val;
2329 	int i;
2330 
2331 	/* stop the dma engine */
2332 	spin_lock_bh(&eth->page_lock);
2333 	val = mtk_r32(eth, glo_cfg);
2334 	mtk_w32(eth, val & ~(MTK_TX_WB_DDONE | MTK_RX_DMA_EN | MTK_TX_DMA_EN),
2335 		glo_cfg);
2336 	spin_unlock_bh(&eth->page_lock);
2337 
2338 	/* wait for dma stop */
2339 	for (i = 0; i < 10; i++) {
2340 		val = mtk_r32(eth, glo_cfg);
2341 		if (val & (MTK_TX_DMA_BUSY | MTK_RX_DMA_BUSY)) {
2342 			msleep(20);
2343 			continue;
2344 		}
2345 		break;
2346 	}
2347 }
2348 
mtk_stop(struct net_device *dev)2349 static int mtk_stop(struct net_device *dev)
2350 {
2351 	struct mtk_mac *mac = netdev_priv(dev);
2352 	struct mtk_eth *eth = mac->hw;
2353 
2354 	phylink_stop(mac->phylink);
2355 
2356 	netif_tx_disable(dev);
2357 
2358 	phylink_disconnect_phy(mac->phylink);
2359 
2360 	/* only shutdown DMA if this is the last user */
2361 	if (!refcount_dec_and_test(&eth->dma_refcnt))
2362 		return 0;
2363 
2364 	mtk_gdm_config(eth, MTK_GDMA_DROP_ALL);
2365 
2366 	mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
2367 	mtk_rx_irq_disable(eth, MTK_RX_DONE_INT);
2368 	napi_disable(&eth->tx_napi);
2369 	napi_disable(&eth->rx_napi);
2370 
2371 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA))
2372 		mtk_stop_dma(eth, MTK_QDMA_GLO_CFG);
2373 	mtk_stop_dma(eth, MTK_PDMA_GLO_CFG);
2374 
2375 	mtk_dma_free(eth);
2376 
2377 	return 0;
2378 }
2379 
ethsys_reset(struct mtk_eth *eth, u32 reset_bits)2380 static void ethsys_reset(struct mtk_eth *eth, u32 reset_bits)
2381 {
2382 	regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL,
2383 			   reset_bits,
2384 			   reset_bits);
2385 
2386 	usleep_range(1000, 1100);
2387 	regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL,
2388 			   reset_bits,
2389 			   ~reset_bits);
2390 	mdelay(10);
2391 }
2392 
mtk_clk_disable(struct mtk_eth *eth)2393 static void mtk_clk_disable(struct mtk_eth *eth)
2394 {
2395 	int clk;
2396 
2397 	for (clk = MTK_CLK_MAX - 1; clk >= 0; clk--)
2398 		clk_disable_unprepare(eth->clks[clk]);
2399 }
2400 
mtk_clk_enable(struct mtk_eth *eth)2401 static int mtk_clk_enable(struct mtk_eth *eth)
2402 {
2403 	int clk, ret;
2404 
2405 	for (clk = 0; clk < MTK_CLK_MAX ; clk++) {
2406 		ret = clk_prepare_enable(eth->clks[clk]);
2407 		if (ret)
2408 			goto err_disable_clks;
2409 	}
2410 
2411 	return 0;
2412 
2413 err_disable_clks:
2414 	while (--clk >= 0)
2415 		clk_disable_unprepare(eth->clks[clk]);
2416 
2417 	return ret;
2418 }
2419 
mtk_hw_init(struct mtk_eth *eth)2420 static int mtk_hw_init(struct mtk_eth *eth)
2421 {
2422 	int i, val, ret;
2423 
2424 	if (test_and_set_bit(MTK_HW_INIT, &eth->state))
2425 		return 0;
2426 
2427 	pm_runtime_enable(eth->dev);
2428 	pm_runtime_get_sync(eth->dev);
2429 
2430 	ret = mtk_clk_enable(eth);
2431 	if (ret)
2432 		goto err_disable_pm;
2433 
2434 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
2435 		ret = device_reset(eth->dev);
2436 		if (ret) {
2437 			dev_err(eth->dev, "MAC reset failed!\n");
2438 			goto err_disable_pm;
2439 		}
2440 
2441 		/* enable interrupt delay for RX */
2442 		mtk_w32(eth, MTK_PDMA_DELAY_RX_DELAY, MTK_PDMA_DELAY_INT);
2443 
2444 		/* disable delay and normal interrupt */
2445 		mtk_tx_irq_disable(eth, ~0);
2446 		mtk_rx_irq_disable(eth, ~0);
2447 
2448 		return 0;
2449 	}
2450 
2451 	/* Non-MT7628 handling... */
2452 	ethsys_reset(eth, RSTCTRL_FE);
2453 	ethsys_reset(eth, RSTCTRL_PPE);
2454 
2455 	if (eth->pctl) {
2456 		/* Set GE2 driving and slew rate */
2457 		regmap_write(eth->pctl, GPIO_DRV_SEL10, 0xa00);
2458 
2459 		/* set GE2 TDSEL */
2460 		regmap_write(eth->pctl, GPIO_OD33_CTRL8, 0x5);
2461 
2462 		/* set GE2 TUNE */
2463 		regmap_write(eth->pctl, GPIO_BIAS_CTRL, 0x0);
2464 	}
2465 
2466 	/* Set linkdown as the default for each GMAC. Its own MCR would be set
2467 	 * up with the more appropriate value when mtk_mac_config call is being
2468 	 * invoked.
2469 	 */
2470 	for (i = 0; i < MTK_MAC_COUNT; i++)
2471 		mtk_w32(eth, MAC_MCR_FORCE_LINK_DOWN, MTK_MAC_MCR(i));
2472 
2473 	/* Indicates CDM to parse the MTK special tag from CPU
2474 	 * which also is working out for untag packets.
2475 	 */
2476 	val = mtk_r32(eth, MTK_CDMQ_IG_CTRL);
2477 	mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL);
2478 
2479 	/* Enable RX VLan Offloading */
2480 	mtk_w32(eth, 1, MTK_CDMP_EG_CTRL);
2481 
2482 	/* enable interrupt delay for RX */
2483 	mtk_w32(eth, MTK_PDMA_DELAY_RX_DELAY, MTK_PDMA_DELAY_INT);
2484 
2485 	/* disable delay and normal interrupt */
2486 	mtk_w32(eth, 0, MTK_QDMA_DELAY_INT);
2487 	mtk_tx_irq_disable(eth, ~0);
2488 	mtk_rx_irq_disable(eth, ~0);
2489 
2490 	/* FE int grouping */
2491 	mtk_w32(eth, MTK_TX_DONE_INT, MTK_PDMA_INT_GRP1);
2492 	mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_GRP2);
2493 	mtk_w32(eth, MTK_TX_DONE_INT, MTK_QDMA_INT_GRP1);
2494 	mtk_w32(eth, MTK_RX_DONE_INT, MTK_QDMA_INT_GRP2);
2495 	mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP);
2496 
2497 	return 0;
2498 
2499 err_disable_pm:
2500 	pm_runtime_put_sync(eth->dev);
2501 	pm_runtime_disable(eth->dev);
2502 
2503 	return ret;
2504 }
2505 
mtk_hw_deinit(struct mtk_eth *eth)2506 static int mtk_hw_deinit(struct mtk_eth *eth)
2507 {
2508 	if (!test_and_clear_bit(MTK_HW_INIT, &eth->state))
2509 		return 0;
2510 
2511 	mtk_clk_disable(eth);
2512 
2513 	pm_runtime_put_sync(eth->dev);
2514 	pm_runtime_disable(eth->dev);
2515 
2516 	return 0;
2517 }
2518 
mtk_init(struct net_device *dev)2519 static int __init mtk_init(struct net_device *dev)
2520 {
2521 	struct mtk_mac *mac = netdev_priv(dev);
2522 	struct mtk_eth *eth = mac->hw;
2523 	const char *mac_addr;
2524 
2525 	mac_addr = of_get_mac_address(mac->of_node);
2526 	if (!IS_ERR(mac_addr))
2527 		ether_addr_copy(dev->dev_addr, mac_addr);
2528 
2529 	/* If the mac address is invalid, use random mac address  */
2530 	if (!is_valid_ether_addr(dev->dev_addr)) {
2531 		eth_hw_addr_random(dev);
2532 		dev_err(eth->dev, "generated random MAC address %pM\n",
2533 			dev->dev_addr);
2534 	}
2535 
2536 	return 0;
2537 }
2538 
mtk_uninit(struct net_device *dev)2539 static void mtk_uninit(struct net_device *dev)
2540 {
2541 	struct mtk_mac *mac = netdev_priv(dev);
2542 	struct mtk_eth *eth = mac->hw;
2543 
2544 	phylink_disconnect_phy(mac->phylink);
2545 	mtk_tx_irq_disable(eth, ~0);
2546 	mtk_rx_irq_disable(eth, ~0);
2547 }
2548 
mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)2549 static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2550 {
2551 	struct mtk_mac *mac = netdev_priv(dev);
2552 
2553 	switch (cmd) {
2554 	case SIOCGMIIPHY:
2555 	case SIOCGMIIREG:
2556 	case SIOCSMIIREG:
2557 		return phylink_mii_ioctl(mac->phylink, ifr, cmd);
2558 	default:
2559 		break;
2560 	}
2561 
2562 	return -EOPNOTSUPP;
2563 }
2564 
mtk_pending_work(struct work_struct *work)2565 static void mtk_pending_work(struct work_struct *work)
2566 {
2567 	struct mtk_eth *eth = container_of(work, struct mtk_eth, pending_work);
2568 	int err, i;
2569 	unsigned long restart = 0;
2570 
2571 	rtnl_lock();
2572 
2573 	dev_dbg(eth->dev, "[%s][%d] reset\n", __func__, __LINE__);
2574 
2575 	while (test_and_set_bit_lock(MTK_RESETTING, &eth->state))
2576 		cpu_relax();
2577 
2578 	dev_dbg(eth->dev, "[%s][%d] mtk_stop starts\n", __func__, __LINE__);
2579 	/* stop all devices to make sure that dma is properly shut down */
2580 	for (i = 0; i < MTK_MAC_COUNT; i++) {
2581 		if (!eth->netdev[i])
2582 			continue;
2583 		mtk_stop(eth->netdev[i]);
2584 		__set_bit(i, &restart);
2585 	}
2586 	dev_dbg(eth->dev, "[%s][%d] mtk_stop ends\n", __func__, __LINE__);
2587 
2588 	/* restart underlying hardware such as power, clock, pin mux
2589 	 * and the connected phy
2590 	 */
2591 	mtk_hw_deinit(eth);
2592 
2593 	if (eth->dev->pins)
2594 		pinctrl_select_state(eth->dev->pins->p,
2595 				     eth->dev->pins->default_state);
2596 	mtk_hw_init(eth);
2597 
2598 	/* restart DMA and enable IRQs */
2599 	for (i = 0; i < MTK_MAC_COUNT; i++) {
2600 		if (!test_bit(i, &restart))
2601 			continue;
2602 		err = mtk_open(eth->netdev[i]);
2603 		if (err) {
2604 			netif_alert(eth, ifup, eth->netdev[i],
2605 			      "Driver up/down cycle failed, closing device.\n");
2606 			dev_close(eth->netdev[i]);
2607 		}
2608 	}
2609 
2610 	dev_dbg(eth->dev, "[%s][%d] reset done\n", __func__, __LINE__);
2611 
2612 	clear_bit_unlock(MTK_RESETTING, &eth->state);
2613 
2614 	rtnl_unlock();
2615 }
2616 
mtk_free_dev(struct mtk_eth *eth)2617 static int mtk_free_dev(struct mtk_eth *eth)
2618 {
2619 	int i;
2620 
2621 	for (i = 0; i < MTK_MAC_COUNT; i++) {
2622 		if (!eth->netdev[i])
2623 			continue;
2624 		free_netdev(eth->netdev[i]);
2625 	}
2626 
2627 	return 0;
2628 }
2629 
mtk_unreg_dev(struct mtk_eth *eth)2630 static int mtk_unreg_dev(struct mtk_eth *eth)
2631 {
2632 	int i;
2633 
2634 	for (i = 0; i < MTK_MAC_COUNT; i++) {
2635 		if (!eth->netdev[i])
2636 			continue;
2637 		unregister_netdev(eth->netdev[i]);
2638 	}
2639 
2640 	return 0;
2641 }
2642 
mtk_cleanup(struct mtk_eth *eth)2643 static int mtk_cleanup(struct mtk_eth *eth)
2644 {
2645 	mtk_unreg_dev(eth);
2646 	mtk_free_dev(eth);
2647 	cancel_work_sync(&eth->pending_work);
2648 
2649 	return 0;
2650 }
2651 
mtk_get_link_ksettings(struct net_device *ndev, struct ethtool_link_ksettings *cmd)2652 static int mtk_get_link_ksettings(struct net_device *ndev,
2653 				  struct ethtool_link_ksettings *cmd)
2654 {
2655 	struct mtk_mac *mac = netdev_priv(ndev);
2656 
2657 	if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state)))
2658 		return -EBUSY;
2659 
2660 	return phylink_ethtool_ksettings_get(mac->phylink, cmd);
2661 }
2662 
mtk_set_link_ksettings(struct net_device *ndev, const struct ethtool_link_ksettings *cmd)2663 static int mtk_set_link_ksettings(struct net_device *ndev,
2664 				  const struct ethtool_link_ksettings *cmd)
2665 {
2666 	struct mtk_mac *mac = netdev_priv(ndev);
2667 
2668 	if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state)))
2669 		return -EBUSY;
2670 
2671 	return phylink_ethtool_ksettings_set(mac->phylink, cmd);
2672 }
2673 
mtk_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)2674 static void mtk_get_drvinfo(struct net_device *dev,
2675 			    struct ethtool_drvinfo *info)
2676 {
2677 	struct mtk_mac *mac = netdev_priv(dev);
2678 
2679 	strlcpy(info->driver, mac->hw->dev->driver->name, sizeof(info->driver));
2680 	strlcpy(info->bus_info, dev_name(mac->hw->dev), sizeof(info->bus_info));
2681 	info->n_stats = ARRAY_SIZE(mtk_ethtool_stats);
2682 }
2683 
mtk_get_msglevel(struct net_device *dev)2684 static u32 mtk_get_msglevel(struct net_device *dev)
2685 {
2686 	struct mtk_mac *mac = netdev_priv(dev);
2687 
2688 	return mac->hw->msg_enable;
2689 }
2690 
mtk_set_msglevel(struct net_device *dev, u32 value)2691 static void mtk_set_msglevel(struct net_device *dev, u32 value)
2692 {
2693 	struct mtk_mac *mac = netdev_priv(dev);
2694 
2695 	mac->hw->msg_enable = value;
2696 }
2697 
mtk_nway_reset(struct net_device *dev)2698 static int mtk_nway_reset(struct net_device *dev)
2699 {
2700 	struct mtk_mac *mac = netdev_priv(dev);
2701 
2702 	if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state)))
2703 		return -EBUSY;
2704 
2705 	if (!mac->phylink)
2706 		return -ENOTSUPP;
2707 
2708 	return phylink_ethtool_nway_reset(mac->phylink);
2709 }
2710 
mtk_get_strings(struct net_device *dev, u32 stringset, u8 *data)2711 static void mtk_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2712 {
2713 	int i;
2714 
2715 	switch (stringset) {
2716 	case ETH_SS_STATS:
2717 		for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) {
2718 			memcpy(data, mtk_ethtool_stats[i].str, ETH_GSTRING_LEN);
2719 			data += ETH_GSTRING_LEN;
2720 		}
2721 		break;
2722 	}
2723 }
2724 
mtk_get_sset_count(struct net_device *dev, int sset)2725 static int mtk_get_sset_count(struct net_device *dev, int sset)
2726 {
2727 	switch (sset) {
2728 	case ETH_SS_STATS:
2729 		return ARRAY_SIZE(mtk_ethtool_stats);
2730 	default:
2731 		return -EOPNOTSUPP;
2732 	}
2733 }
2734 
mtk_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)2735 static void mtk_get_ethtool_stats(struct net_device *dev,
2736 				  struct ethtool_stats *stats, u64 *data)
2737 {
2738 	struct mtk_mac *mac = netdev_priv(dev);
2739 	struct mtk_hw_stats *hwstats = mac->hw_stats;
2740 	u64 *data_src, *data_dst;
2741 	unsigned int start;
2742 	int i;
2743 
2744 	if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state)))
2745 		return;
2746 
2747 	if (netif_running(dev) && netif_device_present(dev)) {
2748 		if (spin_trylock_bh(&hwstats->stats_lock)) {
2749 			mtk_stats_update_mac(mac);
2750 			spin_unlock_bh(&hwstats->stats_lock);
2751 		}
2752 	}
2753 
2754 	data_src = (u64 *)hwstats;
2755 
2756 	do {
2757 		data_dst = data;
2758 		start = u64_stats_fetch_begin_irq(&hwstats->syncp);
2759 
2760 		for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++)
2761 			*data_dst++ = *(data_src + mtk_ethtool_stats[i].offset);
2762 	} while (u64_stats_fetch_retry_irq(&hwstats->syncp, start));
2763 }
2764 
mtk_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd, u32 *rule_locs)2765 static int mtk_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
2766 			 u32 *rule_locs)
2767 {
2768 	int ret = -EOPNOTSUPP;
2769 
2770 	switch (cmd->cmd) {
2771 	case ETHTOOL_GRXRINGS:
2772 		if (dev->hw_features & NETIF_F_LRO) {
2773 			cmd->data = MTK_MAX_RX_RING_NUM;
2774 			ret = 0;
2775 		}
2776 		break;
2777 	case ETHTOOL_GRXCLSRLCNT:
2778 		if (dev->hw_features & NETIF_F_LRO) {
2779 			struct mtk_mac *mac = netdev_priv(dev);
2780 
2781 			cmd->rule_cnt = mac->hwlro_ip_cnt;
2782 			ret = 0;
2783 		}
2784 		break;
2785 	case ETHTOOL_GRXCLSRULE:
2786 		if (dev->hw_features & NETIF_F_LRO)
2787 			ret = mtk_hwlro_get_fdir_entry(dev, cmd);
2788 		break;
2789 	case ETHTOOL_GRXCLSRLALL:
2790 		if (dev->hw_features & NETIF_F_LRO)
2791 			ret = mtk_hwlro_get_fdir_all(dev, cmd,
2792 						     rule_locs);
2793 		break;
2794 	default:
2795 		break;
2796 	}
2797 
2798 	return ret;
2799 }
2800 
mtk_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)2801 static int mtk_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
2802 {
2803 	int ret = -EOPNOTSUPP;
2804 
2805 	switch (cmd->cmd) {
2806 	case ETHTOOL_SRXCLSRLINS:
2807 		if (dev->hw_features & NETIF_F_LRO)
2808 			ret = mtk_hwlro_add_ipaddr(dev, cmd);
2809 		break;
2810 	case ETHTOOL_SRXCLSRLDEL:
2811 		if (dev->hw_features & NETIF_F_LRO)
2812 			ret = mtk_hwlro_del_ipaddr(dev, cmd);
2813 		break;
2814 	default:
2815 		break;
2816 	}
2817 
2818 	return ret;
2819 }
2820 
2821 static const struct ethtool_ops mtk_ethtool_ops = {
2822 	.get_link_ksettings	= mtk_get_link_ksettings,
2823 	.set_link_ksettings	= mtk_set_link_ksettings,
2824 	.get_drvinfo		= mtk_get_drvinfo,
2825 	.get_msglevel		= mtk_get_msglevel,
2826 	.set_msglevel		= mtk_set_msglevel,
2827 	.nway_reset		= mtk_nway_reset,
2828 	.get_link		= ethtool_op_get_link,
2829 	.get_strings		= mtk_get_strings,
2830 	.get_sset_count		= mtk_get_sset_count,
2831 	.get_ethtool_stats	= mtk_get_ethtool_stats,
2832 	.get_rxnfc		= mtk_get_rxnfc,
2833 	.set_rxnfc              = mtk_set_rxnfc,
2834 };
2835 
2836 static const struct net_device_ops mtk_netdev_ops = {
2837 	.ndo_init		= mtk_init,
2838 	.ndo_uninit		= mtk_uninit,
2839 	.ndo_open		= mtk_open,
2840 	.ndo_stop		= mtk_stop,
2841 	.ndo_start_xmit		= mtk_start_xmit,
2842 	.ndo_set_mac_address	= mtk_set_mac_address,
2843 	.ndo_validate_addr	= eth_validate_addr,
2844 	.ndo_do_ioctl		= mtk_do_ioctl,
2845 	.ndo_tx_timeout		= mtk_tx_timeout,
2846 	.ndo_get_stats64        = mtk_get_stats64,
2847 	.ndo_fix_features	= mtk_fix_features,
2848 	.ndo_set_features	= mtk_set_features,
2849 #ifdef CONFIG_NET_POLL_CONTROLLER
2850 	.ndo_poll_controller	= mtk_poll_controller,
2851 #endif
2852 };
2853 
mtk_add_mac(struct mtk_eth *eth, struct device_node *np)2854 static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
2855 {
2856 	const __be32 *_id = of_get_property(np, "reg", NULL);
2857 	phy_interface_t phy_mode;
2858 	struct phylink *phylink;
2859 	struct mtk_mac *mac;
2860 	int id, err;
2861 
2862 	if (!_id) {
2863 		dev_err(eth->dev, "missing mac id\n");
2864 		return -EINVAL;
2865 	}
2866 
2867 	id = be32_to_cpup(_id);
2868 	if (id >= MTK_MAC_COUNT) {
2869 		dev_err(eth->dev, "%d is not a valid mac id\n", id);
2870 		return -EINVAL;
2871 	}
2872 
2873 	if (eth->netdev[id]) {
2874 		dev_err(eth->dev, "duplicate mac id found: %d\n", id);
2875 		return -EINVAL;
2876 	}
2877 
2878 	eth->netdev[id] = alloc_etherdev(sizeof(*mac));
2879 	if (!eth->netdev[id]) {
2880 		dev_err(eth->dev, "alloc_etherdev failed\n");
2881 		return -ENOMEM;
2882 	}
2883 	mac = netdev_priv(eth->netdev[id]);
2884 	eth->mac[id] = mac;
2885 	mac->id = id;
2886 	mac->hw = eth;
2887 	mac->of_node = np;
2888 
2889 	memset(mac->hwlro_ip, 0, sizeof(mac->hwlro_ip));
2890 	mac->hwlro_ip_cnt = 0;
2891 
2892 	mac->hw_stats = devm_kzalloc(eth->dev,
2893 				     sizeof(*mac->hw_stats),
2894 				     GFP_KERNEL);
2895 	if (!mac->hw_stats) {
2896 		dev_err(eth->dev, "failed to allocate counter memory\n");
2897 		err = -ENOMEM;
2898 		goto free_netdev;
2899 	}
2900 	spin_lock_init(&mac->hw_stats->stats_lock);
2901 	u64_stats_init(&mac->hw_stats->syncp);
2902 	mac->hw_stats->reg_offset = id * MTK_STAT_OFFSET;
2903 
2904 	/* phylink create */
2905 	err = of_get_phy_mode(np, &phy_mode);
2906 	if (err) {
2907 		dev_err(eth->dev, "incorrect phy-mode\n");
2908 		goto free_netdev;
2909 	}
2910 
2911 	/* mac config is not set */
2912 	mac->interface = PHY_INTERFACE_MODE_NA;
2913 	mac->mode = MLO_AN_PHY;
2914 	mac->speed = SPEED_UNKNOWN;
2915 
2916 	mac->phylink_config.dev = &eth->netdev[id]->dev;
2917 	mac->phylink_config.type = PHYLINK_NETDEV;
2918 
2919 	phylink = phylink_create(&mac->phylink_config,
2920 				 of_fwnode_handle(mac->of_node),
2921 				 phy_mode, &mtk_phylink_ops);
2922 	if (IS_ERR(phylink)) {
2923 		err = PTR_ERR(phylink);
2924 		goto free_netdev;
2925 	}
2926 
2927 	mac->phylink = phylink;
2928 
2929 	SET_NETDEV_DEV(eth->netdev[id], eth->dev);
2930 	eth->netdev[id]->watchdog_timeo = 5 * HZ;
2931 	eth->netdev[id]->netdev_ops = &mtk_netdev_ops;
2932 	eth->netdev[id]->base_addr = (unsigned long)eth->base;
2933 
2934 	eth->netdev[id]->hw_features = eth->soc->hw_features;
2935 	if (eth->hwlro)
2936 		eth->netdev[id]->hw_features |= NETIF_F_LRO;
2937 
2938 	eth->netdev[id]->vlan_features = eth->soc->hw_features &
2939 		~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX);
2940 	eth->netdev[id]->features |= eth->soc->hw_features;
2941 	eth->netdev[id]->ethtool_ops = &mtk_ethtool_ops;
2942 
2943 	eth->netdev[id]->irq = eth->irq[0];
2944 	eth->netdev[id]->dev.of_node = np;
2945 
2946 	eth->netdev[id]->max_mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN;
2947 
2948 	return 0;
2949 
2950 free_netdev:
2951 	free_netdev(eth->netdev[id]);
2952 	return err;
2953 }
2954 
mtk_probe(struct platform_device *pdev)2955 static int mtk_probe(struct platform_device *pdev)
2956 {
2957 	struct device_node *mac_np;
2958 	struct mtk_eth *eth;
2959 	int err, i;
2960 
2961 	eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL);
2962 	if (!eth)
2963 		return -ENOMEM;
2964 
2965 	eth->soc = of_device_get_match_data(&pdev->dev);
2966 
2967 	eth->dev = &pdev->dev;
2968 	eth->base = devm_platform_ioremap_resource(pdev, 0);
2969 	if (IS_ERR(eth->base))
2970 		return PTR_ERR(eth->base);
2971 
2972 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
2973 		eth->tx_int_mask_reg = MTK_QDMA_INT_MASK;
2974 		eth->tx_int_status_reg = MTK_QDMA_INT_STATUS;
2975 	} else {
2976 		eth->tx_int_mask_reg = MTK_PDMA_INT_MASK;
2977 		eth->tx_int_status_reg = MTK_PDMA_INT_STATUS;
2978 	}
2979 
2980 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
2981 		eth->rx_dma_l4_valid = RX_DMA_L4_VALID_PDMA;
2982 		eth->ip_align = NET_IP_ALIGN;
2983 	} else {
2984 		eth->rx_dma_l4_valid = RX_DMA_L4_VALID;
2985 	}
2986 
2987 	spin_lock_init(&eth->page_lock);
2988 	spin_lock_init(&eth->tx_irq_lock);
2989 	spin_lock_init(&eth->rx_irq_lock);
2990 
2991 	if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
2992 		eth->ethsys = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
2993 							      "mediatek,ethsys");
2994 		if (IS_ERR(eth->ethsys)) {
2995 			dev_err(&pdev->dev, "no ethsys regmap found\n");
2996 			return PTR_ERR(eth->ethsys);
2997 		}
2998 	}
2999 
3000 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_INFRA)) {
3001 		eth->infra = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
3002 							     "mediatek,infracfg");
3003 		if (IS_ERR(eth->infra)) {
3004 			dev_err(&pdev->dev, "no infracfg regmap found\n");
3005 			return PTR_ERR(eth->infra);
3006 		}
3007 	}
3008 
3009 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) {
3010 		eth->sgmii = devm_kzalloc(eth->dev, sizeof(*eth->sgmii),
3011 					  GFP_KERNEL);
3012 		if (!eth->sgmii)
3013 			return -ENOMEM;
3014 
3015 		err = mtk_sgmii_init(eth->sgmii, pdev->dev.of_node,
3016 				     eth->soc->ana_rgc3);
3017 
3018 		if (err)
3019 			return err;
3020 	}
3021 
3022 	if (eth->soc->required_pctl) {
3023 		eth->pctl = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
3024 							    "mediatek,pctl");
3025 		if (IS_ERR(eth->pctl)) {
3026 			dev_err(&pdev->dev, "no pctl regmap found\n");
3027 			return PTR_ERR(eth->pctl);
3028 		}
3029 	}
3030 
3031 	for (i = 0; i < 3; i++) {
3032 		if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT) && i > 0)
3033 			eth->irq[i] = eth->irq[0];
3034 		else
3035 			eth->irq[i] = platform_get_irq(pdev, i);
3036 		if (eth->irq[i] < 0) {
3037 			dev_err(&pdev->dev, "no IRQ%d resource found\n", i);
3038 			return -ENXIO;
3039 		}
3040 	}
3041 	for (i = 0; i < ARRAY_SIZE(eth->clks); i++) {
3042 		eth->clks[i] = devm_clk_get(eth->dev,
3043 					    mtk_clks_source_name[i]);
3044 		if (IS_ERR(eth->clks[i])) {
3045 			if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER)
3046 				return -EPROBE_DEFER;
3047 			if (eth->soc->required_clks & BIT(i)) {
3048 				dev_err(&pdev->dev, "clock %s not found\n",
3049 					mtk_clks_source_name[i]);
3050 				return -EINVAL;
3051 			}
3052 			eth->clks[i] = NULL;
3053 		}
3054 	}
3055 
3056 	eth->msg_enable = netif_msg_init(mtk_msg_level, MTK_DEFAULT_MSG_ENABLE);
3057 	INIT_WORK(&eth->pending_work, mtk_pending_work);
3058 
3059 	err = mtk_hw_init(eth);
3060 	if (err)
3061 		return err;
3062 
3063 	eth->hwlro = MTK_HAS_CAPS(eth->soc->caps, MTK_HWLRO);
3064 
3065 	for_each_child_of_node(pdev->dev.of_node, mac_np) {
3066 		if (!of_device_is_compatible(mac_np,
3067 					     "mediatek,eth-mac"))
3068 			continue;
3069 
3070 		if (!of_device_is_available(mac_np))
3071 			continue;
3072 
3073 		err = mtk_add_mac(eth, mac_np);
3074 		if (err) {
3075 			of_node_put(mac_np);
3076 			goto err_deinit_hw;
3077 		}
3078 	}
3079 
3080 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT)) {
3081 		err = devm_request_irq(eth->dev, eth->irq[0],
3082 				       mtk_handle_irq, 0,
3083 				       dev_name(eth->dev), eth);
3084 	} else {
3085 		err = devm_request_irq(eth->dev, eth->irq[1],
3086 				       mtk_handle_irq_tx, 0,
3087 				       dev_name(eth->dev), eth);
3088 		if (err)
3089 			goto err_free_dev;
3090 
3091 		err = devm_request_irq(eth->dev, eth->irq[2],
3092 				       mtk_handle_irq_rx, 0,
3093 				       dev_name(eth->dev), eth);
3094 	}
3095 	if (err)
3096 		goto err_free_dev;
3097 
3098 	/* No MT7628/88 support yet */
3099 	if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
3100 		err = mtk_mdio_init(eth);
3101 		if (err)
3102 			goto err_free_dev;
3103 	}
3104 
3105 	for (i = 0; i < MTK_MAX_DEVS; i++) {
3106 		if (!eth->netdev[i])
3107 			continue;
3108 
3109 		err = register_netdev(eth->netdev[i]);
3110 		if (err) {
3111 			dev_err(eth->dev, "error bringing up device\n");
3112 			goto err_deinit_mdio;
3113 		} else
3114 			netif_info(eth, probe, eth->netdev[i],
3115 				   "mediatek frame engine at 0x%08lx, irq %d\n",
3116 				   eth->netdev[i]->base_addr, eth->irq[0]);
3117 	}
3118 
3119 	/* we run 2 devices on the same DMA ring so we need a dummy device
3120 	 * for NAPI to work
3121 	 */
3122 	init_dummy_netdev(&eth->dummy_dev);
3123 	netif_napi_add(&eth->dummy_dev, &eth->tx_napi, mtk_napi_tx,
3124 		       MTK_NAPI_WEIGHT);
3125 	netif_napi_add(&eth->dummy_dev, &eth->rx_napi, mtk_napi_rx,
3126 		       MTK_NAPI_WEIGHT);
3127 
3128 	platform_set_drvdata(pdev, eth);
3129 
3130 	return 0;
3131 
3132 err_deinit_mdio:
3133 	mtk_mdio_cleanup(eth);
3134 err_free_dev:
3135 	mtk_free_dev(eth);
3136 err_deinit_hw:
3137 	mtk_hw_deinit(eth);
3138 
3139 	return err;
3140 }
3141 
mtk_remove(struct platform_device *pdev)3142 static int mtk_remove(struct platform_device *pdev)
3143 {
3144 	struct mtk_eth *eth = platform_get_drvdata(pdev);
3145 	struct mtk_mac *mac;
3146 	int i;
3147 
3148 	/* stop all devices to make sure that dma is properly shut down */
3149 	for (i = 0; i < MTK_MAC_COUNT; i++) {
3150 		if (!eth->netdev[i])
3151 			continue;
3152 		mtk_stop(eth->netdev[i]);
3153 		mac = netdev_priv(eth->netdev[i]);
3154 		phylink_disconnect_phy(mac->phylink);
3155 	}
3156 
3157 	mtk_hw_deinit(eth);
3158 
3159 	netif_napi_del(&eth->tx_napi);
3160 	netif_napi_del(&eth->rx_napi);
3161 	mtk_cleanup(eth);
3162 	mtk_mdio_cleanup(eth);
3163 
3164 	return 0;
3165 }
3166 
3167 static const struct mtk_soc_data mt2701_data = {
3168 	.caps = MT7623_CAPS | MTK_HWLRO,
3169 	.hw_features = MTK_HW_FEATURES,
3170 	.required_clks = MT7623_CLKS_BITMAP,
3171 	.required_pctl = true,
3172 };
3173 
3174 static const struct mtk_soc_data mt7621_data = {
3175 	.caps = MT7621_CAPS,
3176 	.hw_features = MTK_HW_FEATURES,
3177 	.required_clks = MT7621_CLKS_BITMAP,
3178 	.required_pctl = false,
3179 };
3180 
3181 static const struct mtk_soc_data mt7622_data = {
3182 	.ana_rgc3 = 0x2028,
3183 	.caps = MT7622_CAPS | MTK_HWLRO,
3184 	.hw_features = MTK_HW_FEATURES,
3185 	.required_clks = MT7622_CLKS_BITMAP,
3186 	.required_pctl = false,
3187 };
3188 
3189 static const struct mtk_soc_data mt7623_data = {
3190 	.caps = MT7623_CAPS | MTK_HWLRO,
3191 	.hw_features = MTK_HW_FEATURES,
3192 	.required_clks = MT7623_CLKS_BITMAP,
3193 	.required_pctl = true,
3194 };
3195 
3196 static const struct mtk_soc_data mt7629_data = {
3197 	.ana_rgc3 = 0x128,
3198 	.caps = MT7629_CAPS | MTK_HWLRO,
3199 	.hw_features = MTK_HW_FEATURES,
3200 	.required_clks = MT7629_CLKS_BITMAP,
3201 	.required_pctl = false,
3202 };
3203 
3204 static const struct mtk_soc_data rt5350_data = {
3205 	.caps = MT7628_CAPS,
3206 	.hw_features = MTK_HW_FEATURES_MT7628,
3207 	.required_clks = MT7628_CLKS_BITMAP,
3208 	.required_pctl = false,
3209 };
3210 
3211 const struct of_device_id of_mtk_match[] = {
3212 	{ .compatible = "mediatek,mt2701-eth", .data = &mt2701_data},
3213 	{ .compatible = "mediatek,mt7621-eth", .data = &mt7621_data},
3214 	{ .compatible = "mediatek,mt7622-eth", .data = &mt7622_data},
3215 	{ .compatible = "mediatek,mt7623-eth", .data = &mt7623_data},
3216 	{ .compatible = "mediatek,mt7629-eth", .data = &mt7629_data},
3217 	{ .compatible = "ralink,rt5350-eth", .data = &rt5350_data},
3218 	{},
3219 };
3220 MODULE_DEVICE_TABLE(of, of_mtk_match);
3221 
3222 static struct platform_driver mtk_driver = {
3223 	.probe = mtk_probe,
3224 	.remove = mtk_remove,
3225 	.driver = {
3226 		.name = "mtk_soc_eth",
3227 		.of_match_table = of_mtk_match,
3228 	},
3229 };
3230 
3231 module_platform_driver(mtk_driver);
3232 
3233 MODULE_LICENSE("GPL");
3234 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
3235 MODULE_DESCRIPTION("Ethernet driver for MediaTek SoC");
3236