Commit | Line | Data |
---|---|---|
89e5785f | 1 | /* |
f75ba50b | 2 | * Cadence MACB/GEM Ethernet Controller driver |
89e5785f HS |
3 | * |
4 | * Copyright (C) 2004-2006 Atmel Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
c220f8cd | 11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
89e5785f HS |
12 | #include <linux/clk.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/moduleparam.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/types.h> | |
909a8583 | 17 | #include <linux/circ_buf.h> |
89e5785f HS |
18 | #include <linux/slab.h> |
19 | #include <linux/init.h> | |
60fe716f | 20 | #include <linux/io.h> |
2dbfdbb9 | 21 | #include <linux/gpio.h> |
270c499f | 22 | #include <linux/gpio/consumer.h> |
a6b7a407 | 23 | #include <linux/interrupt.h> |
89e5785f HS |
24 | #include <linux/netdevice.h> |
25 | #include <linux/etherdevice.h> | |
89e5785f | 26 | #include <linux/dma-mapping.h> |
84e0cdb0 | 27 | #include <linux/platform_data/macb.h> |
89e5785f | 28 | #include <linux/platform_device.h> |
6c36a707 | 29 | #include <linux/phy.h> |
b17471f5 | 30 | #include <linux/of.h> |
fb97a846 | 31 | #include <linux/of_device.h> |
270c499f | 32 | #include <linux/of_gpio.h> |
148cbb53 | 33 | #include <linux/of_mdio.h> |
fb97a846 | 34 | #include <linux/of_net.h> |
89e5785f | 35 | |
89e5785f HS |
36 | #include "macb.h" |
37 | ||
1b44791a | 38 | #define MACB_RX_BUFFER_SIZE 128 |
1b44791a | 39 | #define RX_BUFFER_MULTIPLE 64 /* bytes */ |
55054a16 HS |
40 | #define RX_RING_SIZE 512 /* must be power of 2 */ |
41 | #define RX_RING_BYTES (sizeof(struct macb_dma_desc) * RX_RING_SIZE) | |
89e5785f | 42 | |
55054a16 HS |
43 | #define TX_RING_SIZE 128 /* must be power of 2 */ |
44 | #define TX_RING_BYTES (sizeof(struct macb_dma_desc) * TX_RING_SIZE) | |
89e5785f | 45 | |
909a8583 NF |
46 | /* level of occupied TX descriptors under which we wake up TX process */ |
47 | #define MACB_TX_WAKEUP_THRESH (3 * TX_RING_SIZE / 4) | |
89e5785f HS |
48 | |
49 | #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \ | |
50 | | MACB_BIT(ISR_ROVR)) | |
e86cd53a NF |
51 | #define MACB_TX_ERR_FLAGS (MACB_BIT(ISR_TUND) \ |
52 | | MACB_BIT(ISR_RLE) \ | |
53 | | MACB_BIT(TXERR)) | |
54 | #define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP)) | |
55 | ||
a4c35ed3 CP |
56 | #define MACB_MAX_TX_LEN ((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1)) |
57 | #define GEM_MAX_TX_LEN ((unsigned int)((1 << GEM_TX_FRMLEN_SIZE) - 1)) | |
58 | ||
a5898ea0 HK |
59 | #define GEM_MTU_MIN_SIZE 68 |
60 | ||
3e2a5e15 SP |
61 | #define MACB_WOL_HAS_MAGIC_PACKET (0x1 << 0) |
62 | #define MACB_WOL_ENABLED (0x1 << 1) | |
63 | ||
e86cd53a NF |
64 | /* |
65 | * Graceful stop timeouts in us. We should allow up to | |
66 | * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions) | |
67 | */ | |
68 | #define MACB_HALT_TIMEOUT 1230 | |
89e5785f | 69 | |
55054a16 HS |
70 | /* Ring buffer accessors */ |
71 | static unsigned int macb_tx_ring_wrap(unsigned int index) | |
72 | { | |
73 | return index & (TX_RING_SIZE - 1); | |
74 | } | |
75 | ||
02c958dd CP |
76 | static struct macb_dma_desc *macb_tx_desc(struct macb_queue *queue, |
77 | unsigned int index) | |
55054a16 | 78 | { |
02c958dd | 79 | return &queue->tx_ring[macb_tx_ring_wrap(index)]; |
55054a16 HS |
80 | } |
81 | ||
02c958dd CP |
82 | static struct macb_tx_skb *macb_tx_skb(struct macb_queue *queue, |
83 | unsigned int index) | |
55054a16 | 84 | { |
02c958dd | 85 | return &queue->tx_skb[macb_tx_ring_wrap(index)]; |
55054a16 HS |
86 | } |
87 | ||
02c958dd | 88 | static dma_addr_t macb_tx_dma(struct macb_queue *queue, unsigned int index) |
55054a16 HS |
89 | { |
90 | dma_addr_t offset; | |
91 | ||
92 | offset = macb_tx_ring_wrap(index) * sizeof(struct macb_dma_desc); | |
93 | ||
02c958dd | 94 | return queue->tx_ring_dma + offset; |
55054a16 HS |
95 | } |
96 | ||
97 | static unsigned int macb_rx_ring_wrap(unsigned int index) | |
98 | { | |
99 | return index & (RX_RING_SIZE - 1); | |
100 | } | |
101 | ||
102 | static struct macb_dma_desc *macb_rx_desc(struct macb *bp, unsigned int index) | |
103 | { | |
104 | return &bp->rx_ring[macb_rx_ring_wrap(index)]; | |
105 | } | |
106 | ||
107 | static void *macb_rx_buffer(struct macb *bp, unsigned int index) | |
108 | { | |
1b44791a | 109 | return bp->rx_buffers + bp->rx_buffer_size * macb_rx_ring_wrap(index); |
55054a16 HS |
110 | } |
111 | ||
f2ce8a9e AS |
112 | /* I/O accessors */ |
113 | static u32 hw_readl_native(struct macb *bp, int offset) | |
114 | { | |
115 | return __raw_readl(bp->regs + offset); | |
116 | } | |
117 | ||
118 | static void hw_writel_native(struct macb *bp, int offset, u32 value) | |
119 | { | |
120 | __raw_writel(value, bp->regs + offset); | |
121 | } | |
122 | ||
123 | static u32 hw_readl(struct macb *bp, int offset) | |
124 | { | |
125 | return readl_relaxed(bp->regs + offset); | |
126 | } | |
127 | ||
128 | static void hw_writel(struct macb *bp, int offset, u32 value) | |
129 | { | |
130 | writel_relaxed(value, bp->regs + offset); | |
131 | } | |
132 | ||
133 | /* | |
134 | * Find the CPU endianness by using the loopback bit of NCR register. When the | |
135 | * CPU is in big endian we need to program swaped mode for management | |
136 | * descriptor access. | |
137 | */ | |
138 | static bool hw_is_native_io(void __iomem *addr) | |
139 | { | |
140 | u32 value = MACB_BIT(LLB); | |
141 | ||
142 | __raw_writel(value, addr + MACB_NCR); | |
143 | value = __raw_readl(addr + MACB_NCR); | |
144 | ||
145 | /* Write 0 back to disable everything */ | |
146 | __raw_writel(0, addr + MACB_NCR); | |
147 | ||
148 | return value == MACB_BIT(LLB); | |
149 | } | |
150 | ||
151 | static bool hw_is_gem(void __iomem *addr, bool native_io) | |
152 | { | |
153 | u32 id; | |
154 | ||
155 | if (native_io) | |
156 | id = __raw_readl(addr + MACB_MID); | |
157 | else | |
158 | id = readl_relaxed(addr + MACB_MID); | |
159 | ||
160 | return MACB_BFEXT(IDNUM, id) >= 0x2; | |
161 | } | |
162 | ||
421d9df0 | 163 | static void macb_set_hwaddr(struct macb *bp) |
89e5785f HS |
164 | { |
165 | u32 bottom; | |
166 | u16 top; | |
167 | ||
168 | bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr)); | |
f75ba50b | 169 | macb_or_gem_writel(bp, SA1B, bottom); |
89e5785f | 170 | top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4))); |
f75ba50b | 171 | macb_or_gem_writel(bp, SA1T, top); |
3629a6ce JE |
172 | |
173 | /* Clear unused address register sets */ | |
174 | macb_or_gem_writel(bp, SA2B, 0); | |
175 | macb_or_gem_writel(bp, SA2T, 0); | |
176 | macb_or_gem_writel(bp, SA3B, 0); | |
177 | macb_or_gem_writel(bp, SA3T, 0); | |
178 | macb_or_gem_writel(bp, SA4B, 0); | |
179 | macb_or_gem_writel(bp, SA4T, 0); | |
89e5785f HS |
180 | } |
181 | ||
421d9df0 | 182 | static void macb_get_hwaddr(struct macb *bp) |
89e5785f | 183 | { |
d25e78aa | 184 | struct macb_platform_data *pdata; |
89e5785f HS |
185 | u32 bottom; |
186 | u16 top; | |
187 | u8 addr[6]; | |
17b8bb3e JE |
188 | int i; |
189 | ||
c607a0d9 | 190 | pdata = dev_get_platdata(&bp->pdev->dev); |
d25e78aa | 191 | |
17b8bb3e JE |
192 | /* Check all 4 address register for vaild address */ |
193 | for (i = 0; i < 4; i++) { | |
194 | bottom = macb_or_gem_readl(bp, SA1B + i * 8); | |
195 | top = macb_or_gem_readl(bp, SA1T + i * 8); | |
196 | ||
d25e78aa JE |
197 | if (pdata && pdata->rev_eth_addr) { |
198 | addr[5] = bottom & 0xff; | |
199 | addr[4] = (bottom >> 8) & 0xff; | |
200 | addr[3] = (bottom >> 16) & 0xff; | |
201 | addr[2] = (bottom >> 24) & 0xff; | |
202 | addr[1] = top & 0xff; | |
203 | addr[0] = (top & 0xff00) >> 8; | |
204 | } else { | |
205 | addr[0] = bottom & 0xff; | |
206 | addr[1] = (bottom >> 8) & 0xff; | |
207 | addr[2] = (bottom >> 16) & 0xff; | |
208 | addr[3] = (bottom >> 24) & 0xff; | |
209 | addr[4] = top & 0xff; | |
210 | addr[5] = (top >> 8) & 0xff; | |
211 | } | |
17b8bb3e JE |
212 | |
213 | if (is_valid_ether_addr(addr)) { | |
214 | memcpy(bp->dev->dev_addr, addr, sizeof(addr)); | |
215 | return; | |
216 | } | |
d1d5741d | 217 | } |
17b8bb3e | 218 | |
a35919e1 | 219 | dev_info(&bp->pdev->dev, "invalid hw address, using random\n"); |
17b8bb3e | 220 | eth_hw_addr_random(bp->dev); |
89e5785f HS |
221 | } |
222 | ||
6c36a707 | 223 | static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum) |
89e5785f | 224 | { |
6c36a707 | 225 | struct macb *bp = bus->priv; |
89e5785f HS |
226 | int value; |
227 | ||
89e5785f HS |
228 | macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) |
229 | | MACB_BF(RW, MACB_MAN_READ) | |
6c36a707 R |
230 | | MACB_BF(PHYA, mii_id) |
231 | | MACB_BF(REGA, regnum) | |
89e5785f HS |
232 | | MACB_BF(CODE, MACB_MAN_CODE))); |
233 | ||
6c36a707 R |
234 | /* wait for end of transfer */ |
235 | while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR))) | |
236 | cpu_relax(); | |
89e5785f HS |
237 | |
238 | value = MACB_BFEXT(DATA, macb_readl(bp, MAN)); | |
89e5785f HS |
239 | |
240 | return value; | |
241 | } | |
242 | ||
6c36a707 R |
243 | static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum, |
244 | u16 value) | |
89e5785f | 245 | { |
6c36a707 | 246 | struct macb *bp = bus->priv; |
89e5785f HS |
247 | |
248 | macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) | |
249 | | MACB_BF(RW, MACB_MAN_WRITE) | |
6c36a707 R |
250 | | MACB_BF(PHYA, mii_id) |
251 | | MACB_BF(REGA, regnum) | |
89e5785f | 252 | | MACB_BF(CODE, MACB_MAN_CODE) |
6c36a707 | 253 | | MACB_BF(DATA, value))); |
89e5785f | 254 | |
6c36a707 R |
255 | /* wait for end of transfer */ |
256 | while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR))) | |
257 | cpu_relax(); | |
258 | ||
259 | return 0; | |
260 | } | |
89e5785f | 261 | |
e1824dfe SB |
262 | /** |
263 | * macb_set_tx_clk() - Set a clock to a new frequency | |
264 | * @clk Pointer to the clock to change | |
265 | * @rate New frequency in Hz | |
266 | * @dev Pointer to the struct net_device | |
267 | */ | |
268 | static void macb_set_tx_clk(struct clk *clk, int speed, struct net_device *dev) | |
269 | { | |
270 | long ferr, rate, rate_rounded; | |
271 | ||
93b31f48 CP |
272 | if (!clk) |
273 | return; | |
274 | ||
e1824dfe SB |
275 | switch (speed) { |
276 | case SPEED_10: | |
277 | rate = 2500000; | |
278 | break; | |
279 | case SPEED_100: | |
280 | rate = 25000000; | |
281 | break; | |
282 | case SPEED_1000: | |
283 | rate = 125000000; | |
284 | break; | |
285 | default: | |
9319e47c | 286 | return; |
e1824dfe SB |
287 | } |
288 | ||
289 | rate_rounded = clk_round_rate(clk, rate); | |
290 | if (rate_rounded < 0) | |
291 | return; | |
292 | ||
293 | /* RGMII allows 50 ppm frequency error. Test and warn if this limit | |
294 | * is not satisfied. | |
295 | */ | |
296 | ferr = abs(rate_rounded - rate); | |
297 | ferr = DIV_ROUND_UP(ferr, rate / 100000); | |
298 | if (ferr > 5) | |
299 | netdev_warn(dev, "unable to generate target frequency: %ld Hz\n", | |
300 | rate); | |
301 | ||
302 | if (clk_set_rate(clk, rate_rounded)) | |
303 | netdev_err(dev, "adjusting tx_clk failed.\n"); | |
304 | } | |
305 | ||
6c36a707 | 306 | static void macb_handle_link_change(struct net_device *dev) |
89e5785f | 307 | { |
6c36a707 R |
308 | struct macb *bp = netdev_priv(dev); |
309 | struct phy_device *phydev = bp->phy_dev; | |
310 | unsigned long flags; | |
6c36a707 | 311 | int status_change = 0; |
89e5785f | 312 | |
6c36a707 R |
313 | spin_lock_irqsave(&bp->lock, flags); |
314 | ||
315 | if (phydev->link) { | |
316 | if ((bp->speed != phydev->speed) || | |
317 | (bp->duplex != phydev->duplex)) { | |
318 | u32 reg; | |
319 | ||
320 | reg = macb_readl(bp, NCFGR); | |
321 | reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD)); | |
140b7552 PV |
322 | if (macb_is_gem(bp)) |
323 | reg &= ~GEM_BIT(GBE); | |
6c36a707 R |
324 | |
325 | if (phydev->duplex) | |
326 | reg |= MACB_BIT(FD); | |
179956f4 | 327 | if (phydev->speed == SPEED_100) |
6c36a707 | 328 | reg |= MACB_BIT(SPD); |
e175587f NF |
329 | if (phydev->speed == SPEED_1000 && |
330 | bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE) | |
140b7552 | 331 | reg |= GEM_BIT(GBE); |
6c36a707 | 332 | |
140b7552 | 333 | macb_or_gem_writel(bp, NCFGR, reg); |
6c36a707 R |
334 | |
335 | bp->speed = phydev->speed; | |
336 | bp->duplex = phydev->duplex; | |
337 | status_change = 1; | |
338 | } | |
89e5785f HS |
339 | } |
340 | ||
6c36a707 | 341 | if (phydev->link != bp->link) { |
c8f15686 | 342 | if (!phydev->link) { |
6c36a707 R |
343 | bp->speed = 0; |
344 | bp->duplex = -1; | |
345 | } | |
346 | bp->link = phydev->link; | |
89e5785f | 347 | |
6c36a707 R |
348 | status_change = 1; |
349 | } | |
89e5785f | 350 | |
6c36a707 R |
351 | spin_unlock_irqrestore(&bp->lock, flags); |
352 | ||
353 | if (status_change) { | |
03fc4721 | 354 | if (phydev->link) { |
2c29b235 JA |
355 | /* Update the TX clock rate if and only if the link is |
356 | * up and there has been a link change. | |
357 | */ | |
358 | macb_set_tx_clk(bp->tx_clk, phydev->speed, dev); | |
359 | ||
03fc4721 | 360 | netif_carrier_on(dev); |
c220f8cd JI |
361 | netdev_info(dev, "link up (%d/%s)\n", |
362 | phydev->speed, | |
363 | phydev->duplex == DUPLEX_FULL ? | |
364 | "Full" : "Half"); | |
03fc4721 NF |
365 | } else { |
366 | netif_carrier_off(dev); | |
c220f8cd | 367 | netdev_info(dev, "link down\n"); |
03fc4721 | 368 | } |
6c36a707 | 369 | } |
89e5785f HS |
370 | } |
371 | ||
6c36a707 R |
372 | /* based on au1000_eth. c*/ |
373 | static int macb_mii_probe(struct net_device *dev) | |
89e5785f | 374 | { |
6c36a707 | 375 | struct macb *bp = netdev_priv(dev); |
2dbfdbb9 | 376 | struct macb_platform_data *pdata; |
7455a76f | 377 | struct phy_device *phydev; |
2dbfdbb9 | 378 | int phy_irq; |
7455a76f | 379 | int ret; |
6c36a707 | 380 | |
7455a76f | 381 | phydev = phy_find_first(bp->mii_bus); |
6c36a707 | 382 | if (!phydev) { |
c220f8cd | 383 | netdev_err(dev, "no PHY found\n"); |
7daa78e3 | 384 | return -ENXIO; |
6c36a707 R |
385 | } |
386 | ||
2dbfdbb9 JE |
387 | pdata = dev_get_platdata(&bp->pdev->dev); |
388 | if (pdata && gpio_is_valid(pdata->phy_irq_pin)) { | |
389 | ret = devm_gpio_request(&bp->pdev->dev, pdata->phy_irq_pin, "phy int"); | |
390 | if (!ret) { | |
391 | phy_irq = gpio_to_irq(pdata->phy_irq_pin); | |
392 | phydev->irq = (phy_irq < 0) ? PHY_POLL : phy_irq; | |
393 | } | |
394 | } | |
6c36a707 R |
395 | |
396 | /* attach the mac to the phy */ | |
f9a8f83b | 397 | ret = phy_connect_direct(dev, phydev, &macb_handle_link_change, |
fb97a846 | 398 | bp->phy_interface); |
7455a76f | 399 | if (ret) { |
c220f8cd | 400 | netdev_err(dev, "Could not attach to PHY\n"); |
7455a76f | 401 | return ret; |
6c36a707 R |
402 | } |
403 | ||
404 | /* mask with MAC supported features */ | |
e175587f | 405 | if (macb_is_gem(bp) && bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE) |
140b7552 PV |
406 | phydev->supported &= PHY_GBIT_FEATURES; |
407 | else | |
408 | phydev->supported &= PHY_BASIC_FEATURES; | |
6c36a707 | 409 | |
222ca8e0 NS |
410 | if (bp->caps & MACB_CAPS_NO_GIGABIT_HALF) |
411 | phydev->supported &= ~SUPPORTED_1000baseT_Half; | |
412 | ||
6c36a707 R |
413 | phydev->advertising = phydev->supported; |
414 | ||
415 | bp->link = 0; | |
416 | bp->speed = 0; | |
417 | bp->duplex = -1; | |
418 | bp->phy_dev = phydev; | |
419 | ||
420 | return 0; | |
89e5785f HS |
421 | } |
422 | ||
421d9df0 | 423 | static int macb_mii_init(struct macb *bp) |
89e5785f | 424 | { |
84e0cdb0 | 425 | struct macb_platform_data *pdata; |
148cbb53 | 426 | struct device_node *np; |
6c36a707 | 427 | int err = -ENXIO, i; |
89e5785f | 428 | |
3dbda77e | 429 | /* Enable management port */ |
6c36a707 | 430 | macb_writel(bp, NCR, MACB_BIT(MPE)); |
89e5785f | 431 | |
298cf9be LB |
432 | bp->mii_bus = mdiobus_alloc(); |
433 | if (bp->mii_bus == NULL) { | |
434 | err = -ENOMEM; | |
435 | goto err_out; | |
436 | } | |
437 | ||
438 | bp->mii_bus->name = "MACB_mii_bus"; | |
439 | bp->mii_bus->read = &macb_mdio_read; | |
440 | bp->mii_bus->write = &macb_mdio_write; | |
98d5e57e FF |
441 | snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", |
442 | bp->pdev->name, bp->pdev->id); | |
298cf9be LB |
443 | bp->mii_bus->priv = bp; |
444 | bp->mii_bus->parent = &bp->dev->dev; | |
c607a0d9 | 445 | pdata = dev_get_platdata(&bp->pdev->dev); |
89e5785f | 446 | |
91523947 | 447 | dev_set_drvdata(&bp->dev->dev, bp->mii_bus); |
89e5785f | 448 | |
148cbb53 BB |
449 | np = bp->pdev->dev.of_node; |
450 | if (np) { | |
451 | /* try dt phy registration */ | |
452 | err = of_mdiobus_register(bp->mii_bus, np); | |
453 | ||
454 | /* fallback to standard phy registration if no phy were | |
455 | found during dt phy registration */ | |
456 | if (!err && !phy_find_first(bp->mii_bus)) { | |
457 | for (i = 0; i < PHY_MAX_ADDR; i++) { | |
458 | struct phy_device *phydev; | |
459 | ||
460 | phydev = mdiobus_scan(bp->mii_bus, i); | |
461 | if (IS_ERR(phydev)) { | |
462 | err = PTR_ERR(phydev); | |
463 | break; | |
464 | } | |
465 | } | |
466 | ||
467 | if (err) | |
468 | goto err_out_unregister_bus; | |
469 | } | |
470 | } else { | |
148cbb53 BB |
471 | if (pdata) |
472 | bp->mii_bus->phy_mask = pdata->phy_mask; | |
473 | ||
474 | err = mdiobus_register(bp->mii_bus); | |
475 | } | |
476 | ||
477 | if (err) | |
e7f4dc35 | 478 | goto err_out_free_mdiobus; |
89e5785f | 479 | |
7daa78e3 BB |
480 | err = macb_mii_probe(bp->dev); |
481 | if (err) | |
6c36a707 | 482 | goto err_out_unregister_bus; |
89e5785f | 483 | |
6c36a707 | 484 | return 0; |
89e5785f | 485 | |
6c36a707 | 486 | err_out_unregister_bus: |
298cf9be | 487 | mdiobus_unregister(bp->mii_bus); |
298cf9be LB |
488 | err_out_free_mdiobus: |
489 | mdiobus_free(bp->mii_bus); | |
6c36a707 R |
490 | err_out: |
491 | return err; | |
89e5785f HS |
492 | } |
493 | ||
494 | static void macb_update_stats(struct macb *bp) | |
495 | { | |
a494ed8e JI |
496 | u32 *p = &bp->hw_stats.macb.rx_pause_frames; |
497 | u32 *end = &bp->hw_stats.macb.tx_pause_frames + 1; | |
f2ce8a9e | 498 | int offset = MACB_PFR; |
89e5785f HS |
499 | |
500 | WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4); | |
501 | ||
f2ce8a9e | 502 | for(; p < end; p++, offset += 4) |
7a6e0706 | 503 | *p += bp->macb_reg_readl(bp, offset); |
89e5785f HS |
504 | } |
505 | ||
e86cd53a | 506 | static int macb_halt_tx(struct macb *bp) |
89e5785f | 507 | { |
e86cd53a NF |
508 | unsigned long halt_time, timeout; |
509 | u32 status; | |
89e5785f | 510 | |
e86cd53a | 511 | macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(THALT)); |
89e5785f | 512 | |
e86cd53a NF |
513 | timeout = jiffies + usecs_to_jiffies(MACB_HALT_TIMEOUT); |
514 | do { | |
515 | halt_time = jiffies; | |
516 | status = macb_readl(bp, TSR); | |
517 | if (!(status & MACB_BIT(TGO))) | |
518 | return 0; | |
89e5785f | 519 | |
e86cd53a NF |
520 | usleep_range(10, 250); |
521 | } while (time_before(halt_time, timeout)); | |
bdcba151 | 522 | |
e86cd53a NF |
523 | return -ETIMEDOUT; |
524 | } | |
39eddb4c | 525 | |
a4c35ed3 CP |
526 | static void macb_tx_unmap(struct macb *bp, struct macb_tx_skb *tx_skb) |
527 | { | |
528 | if (tx_skb->mapping) { | |
529 | if (tx_skb->mapped_as_page) | |
530 | dma_unmap_page(&bp->pdev->dev, tx_skb->mapping, | |
531 | tx_skb->size, DMA_TO_DEVICE); | |
532 | else | |
533 | dma_unmap_single(&bp->pdev->dev, tx_skb->mapping, | |
534 | tx_skb->size, DMA_TO_DEVICE); | |
535 | tx_skb->mapping = 0; | |
536 | } | |
537 | ||
538 | if (tx_skb->skb) { | |
539 | dev_kfree_skb_any(tx_skb->skb); | |
540 | tx_skb->skb = NULL; | |
541 | } | |
542 | } | |
543 | ||
e86cd53a NF |
544 | static void macb_tx_error_task(struct work_struct *work) |
545 | { | |
02c958dd CP |
546 | struct macb_queue *queue = container_of(work, struct macb_queue, |
547 | tx_error_task); | |
548 | struct macb *bp = queue->bp; | |
e86cd53a | 549 | struct macb_tx_skb *tx_skb; |
02c958dd | 550 | struct macb_dma_desc *desc; |
e86cd53a NF |
551 | struct sk_buff *skb; |
552 | unsigned int tail; | |
02c958dd CP |
553 | unsigned long flags; |
554 | ||
555 | netdev_vdbg(bp->dev, "macb_tx_error_task: q = %u, t = %u, h = %u\n", | |
556 | (unsigned int)(queue - bp->queues), | |
557 | queue->tx_tail, queue->tx_head); | |
bdcba151 | 558 | |
02c958dd CP |
559 | /* Prevent the queue IRQ handlers from running: each of them may call |
560 | * macb_tx_interrupt(), which in turn may call netif_wake_subqueue(). | |
561 | * As explained below, we have to halt the transmission before updating | |
562 | * TBQP registers so we call netif_tx_stop_all_queues() to notify the | |
563 | * network engine about the macb/gem being halted. | |
564 | */ | |
565 | spin_lock_irqsave(&bp->lock, flags); | |
bdcba151 | 566 | |
e86cd53a | 567 | /* Make sure nobody is trying to queue up new packets */ |
02c958dd | 568 | netif_tx_stop_all_queues(bp->dev); |
d3e61457 | 569 | |
e86cd53a NF |
570 | /* |
571 | * Stop transmission now | |
572 | * (in case we have just queued new packets) | |
02c958dd | 573 | * macb/gem must be halted to write TBQP register |
e86cd53a NF |
574 | */ |
575 | if (macb_halt_tx(bp)) | |
576 | /* Just complain for now, reinitializing TX path can be good */ | |
577 | netdev_err(bp->dev, "BUG: halt tx timed out\n"); | |
bdcba151 | 578 | |
e86cd53a NF |
579 | /* |
580 | * Treat frames in TX queue including the ones that caused the error. | |
581 | * Free transmit buffers in upper layer. | |
582 | */ | |
02c958dd CP |
583 | for (tail = queue->tx_tail; tail != queue->tx_head; tail++) { |
584 | u32 ctrl; | |
55054a16 | 585 | |
02c958dd | 586 | desc = macb_tx_desc(queue, tail); |
e86cd53a | 587 | ctrl = desc->ctrl; |
02c958dd | 588 | tx_skb = macb_tx_skb(queue, tail); |
e86cd53a | 589 | skb = tx_skb->skb; |
bdcba151 | 590 | |
e86cd53a | 591 | if (ctrl & MACB_BIT(TX_USED)) { |
a4c35ed3 CP |
592 | /* skb is set for the last buffer of the frame */ |
593 | while (!skb) { | |
594 | macb_tx_unmap(bp, tx_skb); | |
595 | tail++; | |
02c958dd | 596 | tx_skb = macb_tx_skb(queue, tail); |
a4c35ed3 CP |
597 | skb = tx_skb->skb; |
598 | } | |
599 | ||
600 | /* ctrl still refers to the first buffer descriptor | |
601 | * since it's the only one written back by the hardware | |
602 | */ | |
603 | if (!(ctrl & MACB_BIT(TX_BUF_EXHAUSTED))) { | |
604 | netdev_vdbg(bp->dev, "txerr skb %u (data %p) TX complete\n", | |
605 | macb_tx_ring_wrap(tail), skb->data); | |
606 | bp->stats.tx_packets++; | |
607 | bp->stats.tx_bytes += skb->len; | |
608 | } | |
e86cd53a NF |
609 | } else { |
610 | /* | |
611 | * "Buffers exhausted mid-frame" errors may only happen | |
612 | * if the driver is buggy, so complain loudly about those. | |
613 | * Statistics are updated by hardware. | |
614 | */ | |
615 | if (ctrl & MACB_BIT(TX_BUF_EXHAUSTED)) | |
616 | netdev_err(bp->dev, | |
617 | "BUG: TX buffers exhausted mid-frame\n"); | |
39eddb4c | 618 | |
e86cd53a NF |
619 | desc->ctrl = ctrl | MACB_BIT(TX_USED); |
620 | } | |
621 | ||
a4c35ed3 | 622 | macb_tx_unmap(bp, tx_skb); |
89e5785f HS |
623 | } |
624 | ||
02c958dd CP |
625 | /* Set end of TX queue */ |
626 | desc = macb_tx_desc(queue, 0); | |
627 | desc->addr = 0; | |
628 | desc->ctrl = MACB_BIT(TX_USED); | |
629 | ||
e86cd53a NF |
630 | /* Make descriptor updates visible to hardware */ |
631 | wmb(); | |
632 | ||
633 | /* Reinitialize the TX desc queue */ | |
02c958dd | 634 | queue_writel(queue, TBQP, queue->tx_ring_dma); |
e86cd53a | 635 | /* Make TX ring reflect state of hardware */ |
02c958dd CP |
636 | queue->tx_head = 0; |
637 | queue->tx_tail = 0; | |
e86cd53a NF |
638 | |
639 | /* Housework before enabling TX IRQ */ | |
640 | macb_writel(bp, TSR, macb_readl(bp, TSR)); | |
02c958dd CP |
641 | queue_writel(queue, IER, MACB_TX_INT_FLAGS); |
642 | ||
643 | /* Now we are ready to start transmission again */ | |
644 | netif_tx_start_all_queues(bp->dev); | |
645 | macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); | |
646 | ||
647 | spin_unlock_irqrestore(&bp->lock, flags); | |
e86cd53a NF |
648 | } |
649 | ||
02c958dd | 650 | static void macb_tx_interrupt(struct macb_queue *queue) |
e86cd53a NF |
651 | { |
652 | unsigned int tail; | |
653 | unsigned int head; | |
654 | u32 status; | |
02c958dd CP |
655 | struct macb *bp = queue->bp; |
656 | u16 queue_index = queue - bp->queues; | |
e86cd53a NF |
657 | |
658 | status = macb_readl(bp, TSR); | |
659 | macb_writel(bp, TSR, status); | |
660 | ||
581df9e1 | 661 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) |
02c958dd | 662 | queue_writel(queue, ISR, MACB_BIT(TCOMP)); |
749a2b66 | 663 | |
e86cd53a NF |
664 | netdev_vdbg(bp->dev, "macb_tx_interrupt status = 0x%03lx\n", |
665 | (unsigned long)status); | |
89e5785f | 666 | |
02c958dd CP |
667 | head = queue->tx_head; |
668 | for (tail = queue->tx_tail; tail != head; tail++) { | |
55054a16 HS |
669 | struct macb_tx_skb *tx_skb; |
670 | struct sk_buff *skb; | |
671 | struct macb_dma_desc *desc; | |
672 | u32 ctrl; | |
89e5785f | 673 | |
02c958dd | 674 | desc = macb_tx_desc(queue, tail); |
89e5785f | 675 | |
03dbe05f | 676 | /* Make hw descriptor updates visible to CPU */ |
89e5785f | 677 | rmb(); |
03dbe05f | 678 | |
55054a16 | 679 | ctrl = desc->ctrl; |
89e5785f | 680 | |
a4c35ed3 CP |
681 | /* TX_USED bit is only set by hardware on the very first buffer |
682 | * descriptor of the transmitted frame. | |
683 | */ | |
55054a16 | 684 | if (!(ctrl & MACB_BIT(TX_USED))) |
89e5785f HS |
685 | break; |
686 | ||
a4c35ed3 CP |
687 | /* Process all buffers of the current transmitted frame */ |
688 | for (;; tail++) { | |
02c958dd | 689 | tx_skb = macb_tx_skb(queue, tail); |
a4c35ed3 CP |
690 | skb = tx_skb->skb; |
691 | ||
692 | /* First, update TX stats if needed */ | |
693 | if (skb) { | |
694 | netdev_vdbg(bp->dev, "skb %u (data %p) TX complete\n", | |
695 | macb_tx_ring_wrap(tail), skb->data); | |
696 | bp->stats.tx_packets++; | |
697 | bp->stats.tx_bytes += skb->len; | |
698 | } | |
55054a16 | 699 | |
a4c35ed3 CP |
700 | /* Now we can safely release resources */ |
701 | macb_tx_unmap(bp, tx_skb); | |
702 | ||
703 | /* skb is set only for the last buffer of the frame. | |
704 | * WARNING: at this point skb has been freed by | |
705 | * macb_tx_unmap(). | |
706 | */ | |
707 | if (skb) | |
708 | break; | |
709 | } | |
89e5785f HS |
710 | } |
711 | ||
02c958dd CP |
712 | queue->tx_tail = tail; |
713 | if (__netif_subqueue_stopped(bp->dev, queue_index) && | |
714 | CIRC_CNT(queue->tx_head, queue->tx_tail, | |
715 | TX_RING_SIZE) <= MACB_TX_WAKEUP_THRESH) | |
716 | netif_wake_subqueue(bp->dev, queue_index); | |
89e5785f HS |
717 | } |
718 | ||
4df95131 NF |
719 | static void gem_rx_refill(struct macb *bp) |
720 | { | |
721 | unsigned int entry; | |
722 | struct sk_buff *skb; | |
4df95131 NF |
723 | dma_addr_t paddr; |
724 | ||
725 | while (CIRC_SPACE(bp->rx_prepared_head, bp->rx_tail, RX_RING_SIZE) > 0) { | |
4df95131 | 726 | entry = macb_rx_ring_wrap(bp->rx_prepared_head); |
4df95131 NF |
727 | |
728 | /* Make hw descriptor updates visible to CPU */ | |
729 | rmb(); | |
730 | ||
4df95131 NF |
731 | bp->rx_prepared_head++; |
732 | ||
4df95131 NF |
733 | if (bp->rx_skbuff[entry] == NULL) { |
734 | /* allocate sk_buff for this free entry in ring */ | |
735 | skb = netdev_alloc_skb(bp->dev, bp->rx_buffer_size); | |
736 | if (unlikely(skb == NULL)) { | |
737 | netdev_err(bp->dev, | |
738 | "Unable to allocate sk_buff\n"); | |
739 | break; | |
740 | } | |
4df95131 NF |
741 | |
742 | /* now fill corresponding descriptor entry */ | |
743 | paddr = dma_map_single(&bp->pdev->dev, skb->data, | |
744 | bp->rx_buffer_size, DMA_FROM_DEVICE); | |
92030908 SB |
745 | if (dma_mapping_error(&bp->pdev->dev, paddr)) { |
746 | dev_kfree_skb(skb); | |
747 | break; | |
748 | } | |
749 | ||
750 | bp->rx_skbuff[entry] = skb; | |
4df95131 NF |
751 | |
752 | if (entry == RX_RING_SIZE - 1) | |
753 | paddr |= MACB_BIT(RX_WRAP); | |
754 | bp->rx_ring[entry].addr = paddr; | |
755 | bp->rx_ring[entry].ctrl = 0; | |
756 | ||
757 | /* properly align Ethernet header */ | |
758 | skb_reserve(skb, NET_IP_ALIGN); | |
d4c216c5 PCK |
759 | } else { |
760 | bp->rx_ring[entry].addr &= ~MACB_BIT(RX_USED); | |
761 | bp->rx_ring[entry].ctrl = 0; | |
4df95131 NF |
762 | } |
763 | } | |
764 | ||
765 | /* Make descriptor updates visible to hardware */ | |
766 | wmb(); | |
767 | ||
768 | netdev_vdbg(bp->dev, "rx ring: prepared head %d, tail %d\n", | |
769 | bp->rx_prepared_head, bp->rx_tail); | |
770 | } | |
771 | ||
772 | /* Mark DMA descriptors from begin up to and not including end as unused */ | |
773 | static void discard_partial_frame(struct macb *bp, unsigned int begin, | |
774 | unsigned int end) | |
775 | { | |
776 | unsigned int frag; | |
777 | ||
778 | for (frag = begin; frag != end; frag++) { | |
779 | struct macb_dma_desc *desc = macb_rx_desc(bp, frag); | |
780 | desc->addr &= ~MACB_BIT(RX_USED); | |
781 | } | |
782 | ||
783 | /* Make descriptor updates visible to hardware */ | |
784 | wmb(); | |
785 | ||
786 | /* | |
787 | * When this happens, the hardware stats registers for | |
788 | * whatever caused this is updated, so we don't have to record | |
789 | * anything. | |
790 | */ | |
791 | } | |
792 | ||
793 | static int gem_rx(struct macb *bp, int budget) | |
794 | { | |
795 | unsigned int len; | |
796 | unsigned int entry; | |
797 | struct sk_buff *skb; | |
798 | struct macb_dma_desc *desc; | |
799 | int count = 0; | |
800 | ||
801 | while (count < budget) { | |
802 | u32 addr, ctrl; | |
803 | ||
804 | entry = macb_rx_ring_wrap(bp->rx_tail); | |
805 | desc = &bp->rx_ring[entry]; | |
806 | ||
807 | /* Make hw descriptor updates visible to CPU */ | |
808 | rmb(); | |
809 | ||
810 | addr = desc->addr; | |
811 | ctrl = desc->ctrl; | |
812 | ||
813 | if (!(addr & MACB_BIT(RX_USED))) | |
814 | break; | |
815 | ||
4df95131 NF |
816 | bp->rx_tail++; |
817 | count++; | |
818 | ||
819 | if (!(ctrl & MACB_BIT(RX_SOF) && ctrl & MACB_BIT(RX_EOF))) { | |
820 | netdev_err(bp->dev, | |
821 | "not whole frame pointed by descriptor\n"); | |
822 | bp->stats.rx_dropped++; | |
823 | break; | |
824 | } | |
825 | skb = bp->rx_skbuff[entry]; | |
826 | if (unlikely(!skb)) { | |
827 | netdev_err(bp->dev, | |
828 | "inconsistent Rx descriptor chain\n"); | |
829 | bp->stats.rx_dropped++; | |
830 | break; | |
831 | } | |
832 | /* now everything is ready for receiving packet */ | |
833 | bp->rx_skbuff[entry] = NULL; | |
98b5a0f4 | 834 | len = ctrl & bp->rx_frm_len_mask; |
4df95131 NF |
835 | |
836 | netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len); | |
837 | ||
838 | skb_put(skb, len); | |
839 | addr = MACB_BF(RX_WADDR, MACB_BFEXT(RX_WADDR, addr)); | |
840 | dma_unmap_single(&bp->pdev->dev, addr, | |
48330e08 | 841 | bp->rx_buffer_size, DMA_FROM_DEVICE); |
4df95131 NF |
842 | |
843 | skb->protocol = eth_type_trans(skb, bp->dev); | |
844 | skb_checksum_none_assert(skb); | |
924ec53c CP |
845 | if (bp->dev->features & NETIF_F_RXCSUM && |
846 | !(bp->dev->flags & IFF_PROMISC) && | |
847 | GEM_BFEXT(RX_CSUM, ctrl) & GEM_RX_CSUM_CHECKED_MASK) | |
848 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
4df95131 NF |
849 | |
850 | bp->stats.rx_packets++; | |
851 | bp->stats.rx_bytes += skb->len; | |
852 | ||
853 | #if defined(DEBUG) && defined(VERBOSE_DEBUG) | |
854 | netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n", | |
855 | skb->len, skb->csum); | |
856 | print_hex_dump(KERN_DEBUG, " mac: ", DUMP_PREFIX_ADDRESS, 16, 1, | |
51f83014 | 857 | skb_mac_header(skb), 16, true); |
4df95131 NF |
858 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_ADDRESS, 16, 1, |
859 | skb->data, 32, true); | |
860 | #endif | |
861 | ||
862 | netif_receive_skb(skb); | |
863 | } | |
864 | ||
865 | gem_rx_refill(bp); | |
866 | ||
867 | return count; | |
868 | } | |
869 | ||
89e5785f HS |
870 | static int macb_rx_frame(struct macb *bp, unsigned int first_frag, |
871 | unsigned int last_frag) | |
872 | { | |
873 | unsigned int len; | |
874 | unsigned int frag; | |
29bc2e1e | 875 | unsigned int offset; |
89e5785f | 876 | struct sk_buff *skb; |
55054a16 | 877 | struct macb_dma_desc *desc; |
89e5785f | 878 | |
55054a16 | 879 | desc = macb_rx_desc(bp, last_frag); |
98b5a0f4 | 880 | len = desc->ctrl & bp->rx_frm_len_mask; |
89e5785f | 881 | |
a268adb1 | 882 | netdev_vdbg(bp->dev, "macb_rx_frame frags %u - %u (len %u)\n", |
55054a16 HS |
883 | macb_rx_ring_wrap(first_frag), |
884 | macb_rx_ring_wrap(last_frag), len); | |
89e5785f | 885 | |
29bc2e1e HS |
886 | /* |
887 | * The ethernet header starts NET_IP_ALIGN bytes into the | |
888 | * first buffer. Since the header is 14 bytes, this makes the | |
889 | * payload word-aligned. | |
890 | * | |
891 | * Instead of calling skb_reserve(NET_IP_ALIGN), we just copy | |
892 | * the two padding bytes into the skb so that we avoid hitting | |
893 | * the slowpath in memcpy(), and pull them off afterwards. | |
894 | */ | |
895 | skb = netdev_alloc_skb(bp->dev, len + NET_IP_ALIGN); | |
89e5785f HS |
896 | if (!skb) { |
897 | bp->stats.rx_dropped++; | |
55054a16 HS |
898 | for (frag = first_frag; ; frag++) { |
899 | desc = macb_rx_desc(bp, frag); | |
900 | desc->addr &= ~MACB_BIT(RX_USED); | |
89e5785f HS |
901 | if (frag == last_frag) |
902 | break; | |
903 | } | |
03dbe05f HS |
904 | |
905 | /* Make descriptor updates visible to hardware */ | |
89e5785f | 906 | wmb(); |
03dbe05f | 907 | |
89e5785f HS |
908 | return 1; |
909 | } | |
910 | ||
29bc2e1e HS |
911 | offset = 0; |
912 | len += NET_IP_ALIGN; | |
bc8acf2c | 913 | skb_checksum_none_assert(skb); |
89e5785f HS |
914 | skb_put(skb, len); |
915 | ||
55054a16 | 916 | for (frag = first_frag; ; frag++) { |
1b44791a | 917 | unsigned int frag_len = bp->rx_buffer_size; |
89e5785f HS |
918 | |
919 | if (offset + frag_len > len) { | |
920 | BUG_ON(frag != last_frag); | |
921 | frag_len = len - offset; | |
922 | } | |
27d7ff46 | 923 | skb_copy_to_linear_data_offset(skb, offset, |
55054a16 | 924 | macb_rx_buffer(bp, frag), frag_len); |
1b44791a | 925 | offset += bp->rx_buffer_size; |
55054a16 HS |
926 | desc = macb_rx_desc(bp, frag); |
927 | desc->addr &= ~MACB_BIT(RX_USED); | |
89e5785f HS |
928 | |
929 | if (frag == last_frag) | |
930 | break; | |
931 | } | |
932 | ||
03dbe05f HS |
933 | /* Make descriptor updates visible to hardware */ |
934 | wmb(); | |
935 | ||
29bc2e1e | 936 | __skb_pull(skb, NET_IP_ALIGN); |
89e5785f HS |
937 | skb->protocol = eth_type_trans(skb, bp->dev); |
938 | ||
939 | bp->stats.rx_packets++; | |
29bc2e1e | 940 | bp->stats.rx_bytes += skb->len; |
a268adb1 | 941 | netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n", |
c220f8cd | 942 | skb->len, skb->csum); |
89e5785f HS |
943 | netif_receive_skb(skb); |
944 | ||
945 | return 0; | |
946 | } | |
947 | ||
89e5785f HS |
948 | static int macb_rx(struct macb *bp, int budget) |
949 | { | |
950 | int received = 0; | |
55054a16 | 951 | unsigned int tail; |
89e5785f HS |
952 | int first_frag = -1; |
953 | ||
55054a16 HS |
954 | for (tail = bp->rx_tail; budget > 0; tail++) { |
955 | struct macb_dma_desc *desc = macb_rx_desc(bp, tail); | |
89e5785f HS |
956 | u32 addr, ctrl; |
957 | ||
03dbe05f | 958 | /* Make hw descriptor updates visible to CPU */ |
89e5785f | 959 | rmb(); |
03dbe05f | 960 | |
55054a16 HS |
961 | addr = desc->addr; |
962 | ctrl = desc->ctrl; | |
89e5785f HS |
963 | |
964 | if (!(addr & MACB_BIT(RX_USED))) | |
965 | break; | |
966 | ||
967 | if (ctrl & MACB_BIT(RX_SOF)) { | |
968 | if (first_frag != -1) | |
969 | discard_partial_frame(bp, first_frag, tail); | |
970 | first_frag = tail; | |
971 | } | |
972 | ||
973 | if (ctrl & MACB_BIT(RX_EOF)) { | |
974 | int dropped; | |
975 | BUG_ON(first_frag == -1); | |
976 | ||
977 | dropped = macb_rx_frame(bp, first_frag, tail); | |
978 | first_frag = -1; | |
979 | if (!dropped) { | |
980 | received++; | |
981 | budget--; | |
982 | } | |
983 | } | |
984 | } | |
985 | ||
986 | if (first_frag != -1) | |
987 | bp->rx_tail = first_frag; | |
988 | else | |
989 | bp->rx_tail = tail; | |
990 | ||
991 | return received; | |
992 | } | |
993 | ||
bea3348e | 994 | static int macb_poll(struct napi_struct *napi, int budget) |
89e5785f | 995 | { |
bea3348e | 996 | struct macb *bp = container_of(napi, struct macb, napi); |
bea3348e | 997 | int work_done; |
89e5785f HS |
998 | u32 status; |
999 | ||
1000 | status = macb_readl(bp, RSR); | |
1001 | macb_writel(bp, RSR, status); | |
1002 | ||
bea3348e | 1003 | work_done = 0; |
89e5785f | 1004 | |
a268adb1 | 1005 | netdev_vdbg(bp->dev, "poll: status = %08lx, budget = %d\n", |
c220f8cd | 1006 | (unsigned long)status, budget); |
89e5785f | 1007 | |
4df95131 | 1008 | work_done = bp->macbgem_ops.mog_rx(bp, budget); |
b336369c | 1009 | if (work_done < budget) { |
288379f0 | 1010 | napi_complete(napi); |
89e5785f | 1011 | |
8770e91a NF |
1012 | /* Packets received while interrupts were disabled */ |
1013 | status = macb_readl(bp, RSR); | |
504ad98d | 1014 | if (status) { |
02f7a34f SB |
1015 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) |
1016 | macb_writel(bp, ISR, MACB_BIT(RCOMP)); | |
8770e91a | 1017 | napi_reschedule(napi); |
02f7a34f SB |
1018 | } else { |
1019 | macb_writel(bp, IER, MACB_RX_INT_FLAGS); | |
1020 | } | |
b336369c | 1021 | } |
89e5785f HS |
1022 | |
1023 | /* TODO: Handle errors */ | |
1024 | ||
bea3348e | 1025 | return work_done; |
89e5785f HS |
1026 | } |
1027 | ||
1028 | static irqreturn_t macb_interrupt(int irq, void *dev_id) | |
1029 | { | |
02c958dd CP |
1030 | struct macb_queue *queue = dev_id; |
1031 | struct macb *bp = queue->bp; | |
1032 | struct net_device *dev = bp->dev; | |
bfbb92c4 | 1033 | u32 status, ctrl; |
89e5785f | 1034 | |
02c958dd | 1035 | status = queue_readl(queue, ISR); |
89e5785f HS |
1036 | |
1037 | if (unlikely(!status)) | |
1038 | return IRQ_NONE; | |
1039 | ||
1040 | spin_lock(&bp->lock); | |
1041 | ||
1042 | while (status) { | |
89e5785f HS |
1043 | /* close possible race with dev_close */ |
1044 | if (unlikely(!netif_running(dev))) { | |
02c958dd | 1045 | queue_writel(queue, IDR, -1); |
24468374 NS |
1046 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) |
1047 | queue_writel(queue, ISR, -1); | |
89e5785f HS |
1048 | break; |
1049 | } | |
1050 | ||
02c958dd CP |
1051 | netdev_vdbg(bp->dev, "queue = %u, isr = 0x%08lx\n", |
1052 | (unsigned int)(queue - bp->queues), | |
1053 | (unsigned long)status); | |
a268adb1 | 1054 | |
89e5785f | 1055 | if (status & MACB_RX_INT_FLAGS) { |
b336369c JH |
1056 | /* |
1057 | * There's no point taking any more interrupts | |
1058 | * until we have processed the buffers. The | |
1059 | * scheduling call may fail if the poll routine | |
1060 | * is already scheduled, so disable interrupts | |
1061 | * now. | |
1062 | */ | |
02c958dd | 1063 | queue_writel(queue, IDR, MACB_RX_INT_FLAGS); |
581df9e1 | 1064 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) |
02c958dd | 1065 | queue_writel(queue, ISR, MACB_BIT(RCOMP)); |
b336369c | 1066 | |
288379f0 | 1067 | if (napi_schedule_prep(&bp->napi)) { |
a268adb1 | 1068 | netdev_vdbg(bp->dev, "scheduling RX softirq\n"); |
288379f0 | 1069 | __napi_schedule(&bp->napi); |
89e5785f HS |
1070 | } |
1071 | } | |
1072 | ||
e86cd53a | 1073 | if (unlikely(status & (MACB_TX_ERR_FLAGS))) { |
02c958dd CP |
1074 | queue_writel(queue, IDR, MACB_TX_INT_FLAGS); |
1075 | schedule_work(&queue->tx_error_task); | |
6a027b70 SB |
1076 | |
1077 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) | |
02c958dd | 1078 | queue_writel(queue, ISR, MACB_TX_ERR_FLAGS); |
6a027b70 | 1079 | |
e86cd53a NF |
1080 | break; |
1081 | } | |
1082 | ||
1083 | if (status & MACB_BIT(TCOMP)) | |
02c958dd | 1084 | macb_tx_interrupt(queue); |
89e5785f HS |
1085 | |
1086 | /* | |
1087 | * Link change detection isn't possible with RMII, so we'll | |
1088 | * add that if/when we get our hands on a full-blown MII PHY. | |
1089 | */ | |
1090 | ||
86b5e7de NS |
1091 | /* There is a hardware issue under heavy load where DMA can |
1092 | * stop, this causes endless "used buffer descriptor read" | |
1093 | * interrupts but it can be cleared by re-enabling RX. See | |
1094 | * the at91 manual, section 41.3.1 or the Zynq manual | |
1095 | * section 16.7.4 for details. | |
1096 | */ | |
bfbb92c4 NS |
1097 | if (status & MACB_BIT(RXUBR)) { |
1098 | ctrl = macb_readl(bp, NCR); | |
1099 | macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE)); | |
1100 | macb_writel(bp, NCR, ctrl | MACB_BIT(RE)); | |
1101 | ||
1102 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) | |
1103 | macb_writel(bp, ISR, MACB_BIT(RXUBR)); | |
1104 | } | |
1105 | ||
b19f7f71 AS |
1106 | if (status & MACB_BIT(ISR_ROVR)) { |
1107 | /* We missed at least one packet */ | |
f75ba50b JI |
1108 | if (macb_is_gem(bp)) |
1109 | bp->hw_stats.gem.rx_overruns++; | |
1110 | else | |
1111 | bp->hw_stats.macb.rx_overruns++; | |
6a027b70 SB |
1112 | |
1113 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) | |
02c958dd | 1114 | queue_writel(queue, ISR, MACB_BIT(ISR_ROVR)); |
b19f7f71 AS |
1115 | } |
1116 | ||
89e5785f HS |
1117 | if (status & MACB_BIT(HRESP)) { |
1118 | /* | |
c220f8cd JI |
1119 | * TODO: Reset the hardware, and maybe move the |
1120 | * netdev_err to a lower-priority context as well | |
1121 | * (work queue?) | |
89e5785f | 1122 | */ |
c220f8cd | 1123 | netdev_err(dev, "DMA bus error: HRESP not OK\n"); |
6a027b70 SB |
1124 | |
1125 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) | |
02c958dd | 1126 | queue_writel(queue, ISR, MACB_BIT(HRESP)); |
89e5785f HS |
1127 | } |
1128 | ||
02c958dd | 1129 | status = queue_readl(queue, ISR); |
89e5785f HS |
1130 | } |
1131 | ||
1132 | spin_unlock(&bp->lock); | |
1133 | ||
1134 | return IRQ_HANDLED; | |
1135 | } | |
1136 | ||
6e8cf5c0 TP |
1137 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1138 | /* | |
1139 | * Polling receive - used by netconsole and other diagnostic tools | |
1140 | * to allow network i/o with interrupts disabled. | |
1141 | */ | |
1142 | static void macb_poll_controller(struct net_device *dev) | |
1143 | { | |
02c958dd CP |
1144 | struct macb *bp = netdev_priv(dev); |
1145 | struct macb_queue *queue; | |
6e8cf5c0 | 1146 | unsigned long flags; |
02c958dd | 1147 | unsigned int q; |
6e8cf5c0 TP |
1148 | |
1149 | local_irq_save(flags); | |
02c958dd CP |
1150 | for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) |
1151 | macb_interrupt(dev->irq, queue); | |
6e8cf5c0 TP |
1152 | local_irq_restore(flags); |
1153 | } | |
1154 | #endif | |
1155 | ||
a4c35ed3 | 1156 | static unsigned int macb_tx_map(struct macb *bp, |
02c958dd | 1157 | struct macb_queue *queue, |
a4c35ed3 | 1158 | struct sk_buff *skb) |
89e5785f | 1159 | { |
89e5785f | 1160 | dma_addr_t mapping; |
02c958dd | 1161 | unsigned int len, entry, i, tx_head = queue->tx_head; |
a4c35ed3 | 1162 | struct macb_tx_skb *tx_skb = NULL; |
55054a16 | 1163 | struct macb_dma_desc *desc; |
a4c35ed3 CP |
1164 | unsigned int offset, size, count = 0; |
1165 | unsigned int f, nr_frags = skb_shinfo(skb)->nr_frags; | |
1166 | unsigned int eof = 1; | |
89e5785f | 1167 | u32 ctrl; |
a4c35ed3 CP |
1168 | |
1169 | /* First, map non-paged data */ | |
1170 | len = skb_headlen(skb); | |
1171 | offset = 0; | |
1172 | while (len) { | |
1173 | size = min(len, bp->max_tx_length); | |
1174 | entry = macb_tx_ring_wrap(tx_head); | |
02c958dd | 1175 | tx_skb = &queue->tx_skb[entry]; |
a4c35ed3 CP |
1176 | |
1177 | mapping = dma_map_single(&bp->pdev->dev, | |
1178 | skb->data + offset, | |
1179 | size, DMA_TO_DEVICE); | |
1180 | if (dma_mapping_error(&bp->pdev->dev, mapping)) | |
1181 | goto dma_error; | |
1182 | ||
1183 | /* Save info to properly release resources */ | |
1184 | tx_skb->skb = NULL; | |
1185 | tx_skb->mapping = mapping; | |
1186 | tx_skb->size = size; | |
1187 | tx_skb->mapped_as_page = false; | |
1188 | ||
1189 | len -= size; | |
1190 | offset += size; | |
1191 | count++; | |
1192 | tx_head++; | |
1193 | } | |
1194 | ||
1195 | /* Then, map paged data from fragments */ | |
1196 | for (f = 0; f < nr_frags; f++) { | |
1197 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; | |
1198 | ||
1199 | len = skb_frag_size(frag); | |
1200 | offset = 0; | |
1201 | while (len) { | |
1202 | size = min(len, bp->max_tx_length); | |
1203 | entry = macb_tx_ring_wrap(tx_head); | |
02c958dd | 1204 | tx_skb = &queue->tx_skb[entry]; |
a4c35ed3 CP |
1205 | |
1206 | mapping = skb_frag_dma_map(&bp->pdev->dev, frag, | |
1207 | offset, size, DMA_TO_DEVICE); | |
1208 | if (dma_mapping_error(&bp->pdev->dev, mapping)) | |
1209 | goto dma_error; | |
1210 | ||
1211 | /* Save info to properly release resources */ | |
1212 | tx_skb->skb = NULL; | |
1213 | tx_skb->mapping = mapping; | |
1214 | tx_skb->size = size; | |
1215 | tx_skb->mapped_as_page = true; | |
1216 | ||
1217 | len -= size; | |
1218 | offset += size; | |
1219 | count++; | |
1220 | tx_head++; | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | /* Should never happen */ | |
1225 | if (unlikely(tx_skb == NULL)) { | |
1226 | netdev_err(bp->dev, "BUG! empty skb!\n"); | |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | /* This is the last buffer of the frame: save socket buffer */ | |
1231 | tx_skb->skb = skb; | |
1232 | ||
1233 | /* Update TX ring: update buffer descriptors in reverse order | |
1234 | * to avoid race condition | |
1235 | */ | |
1236 | ||
1237 | /* Set 'TX_USED' bit in buffer descriptor at tx_head position | |
1238 | * to set the end of TX queue | |
1239 | */ | |
1240 | i = tx_head; | |
1241 | entry = macb_tx_ring_wrap(i); | |
1242 | ctrl = MACB_BIT(TX_USED); | |
02c958dd | 1243 | desc = &queue->tx_ring[entry]; |
a4c35ed3 CP |
1244 | desc->ctrl = ctrl; |
1245 | ||
1246 | do { | |
1247 | i--; | |
1248 | entry = macb_tx_ring_wrap(i); | |
02c958dd CP |
1249 | tx_skb = &queue->tx_skb[entry]; |
1250 | desc = &queue->tx_ring[entry]; | |
a4c35ed3 CP |
1251 | |
1252 | ctrl = (u32)tx_skb->size; | |
1253 | if (eof) { | |
1254 | ctrl |= MACB_BIT(TX_LAST); | |
1255 | eof = 0; | |
1256 | } | |
1257 | if (unlikely(entry == (TX_RING_SIZE - 1))) | |
1258 | ctrl |= MACB_BIT(TX_WRAP); | |
1259 | ||
1260 | /* Set TX buffer descriptor */ | |
1261 | desc->addr = tx_skb->mapping; | |
1262 | /* desc->addr must be visible to hardware before clearing | |
1263 | * 'TX_USED' bit in desc->ctrl. | |
1264 | */ | |
1265 | wmb(); | |
1266 | desc->ctrl = ctrl; | |
02c958dd | 1267 | } while (i != queue->tx_head); |
a4c35ed3 | 1268 | |
02c958dd | 1269 | queue->tx_head = tx_head; |
a4c35ed3 CP |
1270 | |
1271 | return count; | |
1272 | ||
1273 | dma_error: | |
1274 | netdev_err(bp->dev, "TX DMA map failed\n"); | |
1275 | ||
02c958dd CP |
1276 | for (i = queue->tx_head; i != tx_head; i++) { |
1277 | tx_skb = macb_tx_skb(queue, i); | |
a4c35ed3 CP |
1278 | |
1279 | macb_tx_unmap(bp, tx_skb); | |
1280 | } | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1286 | { | |
02c958dd | 1287 | u16 queue_index = skb_get_queue_mapping(skb); |
a4c35ed3 | 1288 | struct macb *bp = netdev_priv(dev); |
02c958dd | 1289 | struct macb_queue *queue = &bp->queues[queue_index]; |
4871953c | 1290 | unsigned long flags; |
a4c35ed3 | 1291 | unsigned int count, nr_frags, frag_size, f; |
89e5785f | 1292 | |
a268adb1 HS |
1293 | #if defined(DEBUG) && defined(VERBOSE_DEBUG) |
1294 | netdev_vdbg(bp->dev, | |
02c958dd CP |
1295 | "start_xmit: queue %hu len %u head %p data %p tail %p end %p\n", |
1296 | queue_index, skb->len, skb->head, skb->data, | |
c220f8cd JI |
1297 | skb_tail_pointer(skb), skb_end_pointer(skb)); |
1298 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_OFFSET, 16, 1, | |
1299 | skb->data, 16, true); | |
89e5785f HS |
1300 | #endif |
1301 | ||
a4c35ed3 CP |
1302 | /* Count how many TX buffer descriptors are needed to send this |
1303 | * socket buffer: skb fragments of jumbo frames may need to be | |
1304 | * splitted into many buffer descriptors. | |
1305 | */ | |
94b295ed | 1306 | count = DIV_ROUND_UP(skb_headlen(skb), bp->max_tx_length); |
a4c35ed3 CP |
1307 | nr_frags = skb_shinfo(skb)->nr_frags; |
1308 | for (f = 0; f < nr_frags; f++) { | |
1309 | frag_size = skb_frag_size(&skb_shinfo(skb)->frags[f]); | |
94b295ed | 1310 | count += DIV_ROUND_UP(frag_size, bp->max_tx_length); |
a4c35ed3 CP |
1311 | } |
1312 | ||
4871953c | 1313 | spin_lock_irqsave(&bp->lock, flags); |
89e5785f HS |
1314 | |
1315 | /* This is a hard error, log it. */ | |
02c958dd CP |
1316 | if (CIRC_SPACE(queue->tx_head, queue->tx_tail, TX_RING_SIZE) < count) { |
1317 | netif_stop_subqueue(dev, queue_index); | |
4871953c | 1318 | spin_unlock_irqrestore(&bp->lock, flags); |
c220f8cd | 1319 | netdev_dbg(bp->dev, "tx_head = %u, tx_tail = %u\n", |
02c958dd | 1320 | queue->tx_head, queue->tx_tail); |
5b548140 | 1321 | return NETDEV_TX_BUSY; |
89e5785f HS |
1322 | } |
1323 | ||
a4c35ed3 | 1324 | /* Map socket buffer for DMA transfer */ |
02c958dd | 1325 | if (!macb_tx_map(bp, queue, skb)) { |
c88b5b6a | 1326 | dev_kfree_skb_any(skb); |
92030908 SB |
1327 | goto unlock; |
1328 | } | |
55054a16 | 1329 | |
03dbe05f | 1330 | /* Make newly initialized descriptor visible to hardware */ |
89e5785f HS |
1331 | wmb(); |
1332 | ||
e072092f RC |
1333 | skb_tx_timestamp(skb); |
1334 | ||
89e5785f HS |
1335 | macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); |
1336 | ||
02c958dd CP |
1337 | if (CIRC_SPACE(queue->tx_head, queue->tx_tail, TX_RING_SIZE) < 1) |
1338 | netif_stop_subqueue(dev, queue_index); | |
89e5785f | 1339 | |
92030908 | 1340 | unlock: |
4871953c | 1341 | spin_unlock_irqrestore(&bp->lock, flags); |
89e5785f | 1342 | |
6ed10654 | 1343 | return NETDEV_TX_OK; |
89e5785f HS |
1344 | } |
1345 | ||
4df95131 | 1346 | static void macb_init_rx_buffer_size(struct macb *bp, size_t size) |
1b44791a NF |
1347 | { |
1348 | if (!macb_is_gem(bp)) { | |
1349 | bp->rx_buffer_size = MACB_RX_BUFFER_SIZE; | |
1350 | } else { | |
4df95131 | 1351 | bp->rx_buffer_size = size; |
1b44791a | 1352 | |
1b44791a | 1353 | if (bp->rx_buffer_size % RX_BUFFER_MULTIPLE) { |
4df95131 NF |
1354 | netdev_dbg(bp->dev, |
1355 | "RX buffer must be multiple of %d bytes, expanding\n", | |
1b44791a NF |
1356 | RX_BUFFER_MULTIPLE); |
1357 | bp->rx_buffer_size = | |
4df95131 | 1358 | roundup(bp->rx_buffer_size, RX_BUFFER_MULTIPLE); |
1b44791a | 1359 | } |
1b44791a | 1360 | } |
4df95131 NF |
1361 | |
1362 | netdev_dbg(bp->dev, "mtu [%u] rx_buffer_size [%Zu]\n", | |
1363 | bp->dev->mtu, bp->rx_buffer_size); | |
1b44791a NF |
1364 | } |
1365 | ||
4df95131 NF |
1366 | static void gem_free_rx_buffers(struct macb *bp) |
1367 | { | |
1368 | struct sk_buff *skb; | |
1369 | struct macb_dma_desc *desc; | |
1370 | dma_addr_t addr; | |
1371 | int i; | |
1372 | ||
1373 | if (!bp->rx_skbuff) | |
1374 | return; | |
1375 | ||
1376 | for (i = 0; i < RX_RING_SIZE; i++) { | |
1377 | skb = bp->rx_skbuff[i]; | |
1378 | ||
1379 | if (skb == NULL) | |
1380 | continue; | |
1381 | ||
1382 | desc = &bp->rx_ring[i]; | |
1383 | addr = MACB_BF(RX_WADDR, MACB_BFEXT(RX_WADDR, desc->addr)); | |
ccd6d0a9 | 1384 | dma_unmap_single(&bp->pdev->dev, addr, bp->rx_buffer_size, |
4df95131 NF |
1385 | DMA_FROM_DEVICE); |
1386 | dev_kfree_skb_any(skb); | |
1387 | skb = NULL; | |
1388 | } | |
1389 | ||
1390 | kfree(bp->rx_skbuff); | |
1391 | bp->rx_skbuff = NULL; | |
1392 | } | |
1393 | ||
1394 | static void macb_free_rx_buffers(struct macb *bp) | |
1395 | { | |
1396 | if (bp->rx_buffers) { | |
1397 | dma_free_coherent(&bp->pdev->dev, | |
1398 | RX_RING_SIZE * bp->rx_buffer_size, | |
1399 | bp->rx_buffers, bp->rx_buffers_dma); | |
1400 | bp->rx_buffers = NULL; | |
1401 | } | |
1402 | } | |
1b44791a | 1403 | |
89e5785f HS |
1404 | static void macb_free_consistent(struct macb *bp) |
1405 | { | |
02c958dd CP |
1406 | struct macb_queue *queue; |
1407 | unsigned int q; | |
1408 | ||
4df95131 | 1409 | bp->macbgem_ops.mog_free_rx_buffers(bp); |
89e5785f HS |
1410 | if (bp->rx_ring) { |
1411 | dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES, | |
1412 | bp->rx_ring, bp->rx_ring_dma); | |
1413 | bp->rx_ring = NULL; | |
1414 | } | |
02c958dd CP |
1415 | |
1416 | for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { | |
1417 | kfree(queue->tx_skb); | |
1418 | queue->tx_skb = NULL; | |
1419 | if (queue->tx_ring) { | |
1420 | dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES, | |
1421 | queue->tx_ring, queue->tx_ring_dma); | |
1422 | queue->tx_ring = NULL; | |
1423 | } | |
89e5785f | 1424 | } |
4df95131 NF |
1425 | } |
1426 | ||
1427 | static int gem_alloc_rx_buffers(struct macb *bp) | |
1428 | { | |
1429 | int size; | |
1430 | ||
1431 | size = RX_RING_SIZE * sizeof(struct sk_buff *); | |
1432 | bp->rx_skbuff = kzalloc(size, GFP_KERNEL); | |
1433 | if (!bp->rx_skbuff) | |
1434 | return -ENOMEM; | |
1435 | else | |
1436 | netdev_dbg(bp->dev, | |
1437 | "Allocated %d RX struct sk_buff entries at %p\n", | |
1438 | RX_RING_SIZE, bp->rx_skbuff); | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | static int macb_alloc_rx_buffers(struct macb *bp) | |
1443 | { | |
1444 | int size; | |
1445 | ||
1446 | size = RX_RING_SIZE * bp->rx_buffer_size; | |
1447 | bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size, | |
1448 | &bp->rx_buffers_dma, GFP_KERNEL); | |
1449 | if (!bp->rx_buffers) | |
1450 | return -ENOMEM; | |
1451 | else | |
1452 | netdev_dbg(bp->dev, | |
1453 | "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n", | |
1454 | size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers); | |
1455 | return 0; | |
89e5785f HS |
1456 | } |
1457 | ||
1458 | static int macb_alloc_consistent(struct macb *bp) | |
1459 | { | |
02c958dd CP |
1460 | struct macb_queue *queue; |
1461 | unsigned int q; | |
89e5785f HS |
1462 | int size; |
1463 | ||
02c958dd CP |
1464 | for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { |
1465 | size = TX_RING_BYTES; | |
1466 | queue->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size, | |
1467 | &queue->tx_ring_dma, | |
1468 | GFP_KERNEL); | |
1469 | if (!queue->tx_ring) | |
1470 | goto out_err; | |
1471 | netdev_dbg(bp->dev, | |
1472 | "Allocated TX ring for queue %u of %d bytes at %08lx (mapped %p)\n", | |
1473 | q, size, (unsigned long)queue->tx_ring_dma, | |
1474 | queue->tx_ring); | |
1475 | ||
1476 | size = TX_RING_SIZE * sizeof(struct macb_tx_skb); | |
1477 | queue->tx_skb = kmalloc(size, GFP_KERNEL); | |
1478 | if (!queue->tx_skb) | |
1479 | goto out_err; | |
1480 | } | |
89e5785f HS |
1481 | |
1482 | size = RX_RING_BYTES; | |
1483 | bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size, | |
1484 | &bp->rx_ring_dma, GFP_KERNEL); | |
1485 | if (!bp->rx_ring) | |
1486 | goto out_err; | |
c220f8cd JI |
1487 | netdev_dbg(bp->dev, |
1488 | "Allocated RX ring of %d bytes at %08lx (mapped %p)\n", | |
1489 | size, (unsigned long)bp->rx_ring_dma, bp->rx_ring); | |
89e5785f | 1490 | |
4df95131 | 1491 | if (bp->macbgem_ops.mog_alloc_rx_buffers(bp)) |
89e5785f | 1492 | goto out_err; |
89e5785f HS |
1493 | |
1494 | return 0; | |
1495 | ||
1496 | out_err: | |
1497 | macb_free_consistent(bp); | |
1498 | return -ENOMEM; | |
1499 | } | |
1500 | ||
4df95131 NF |
1501 | static void gem_init_rings(struct macb *bp) |
1502 | { | |
02c958dd CP |
1503 | struct macb_queue *queue; |
1504 | unsigned int q; | |
4df95131 NF |
1505 | int i; |
1506 | ||
02c958dd CP |
1507 | for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { |
1508 | for (i = 0; i < TX_RING_SIZE; i++) { | |
1509 | queue->tx_ring[i].addr = 0; | |
1510 | queue->tx_ring[i].ctrl = MACB_BIT(TX_USED); | |
1511 | } | |
1512 | queue->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP); | |
1513 | queue->tx_head = 0; | |
1514 | queue->tx_tail = 0; | |
4df95131 | 1515 | } |
4df95131 | 1516 | |
02c958dd CP |
1517 | bp->rx_tail = 0; |
1518 | bp->rx_prepared_head = 0; | |
4df95131 NF |
1519 | |
1520 | gem_rx_refill(bp); | |
1521 | } | |
1522 | ||
89e5785f HS |
1523 | static void macb_init_rings(struct macb *bp) |
1524 | { | |
1525 | int i; | |
1526 | dma_addr_t addr; | |
1527 | ||
1528 | addr = bp->rx_buffers_dma; | |
1529 | for (i = 0; i < RX_RING_SIZE; i++) { | |
1530 | bp->rx_ring[i].addr = addr; | |
1531 | bp->rx_ring[i].ctrl = 0; | |
1b44791a | 1532 | addr += bp->rx_buffer_size; |
89e5785f HS |
1533 | } |
1534 | bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP); | |
1535 | ||
1536 | for (i = 0; i < TX_RING_SIZE; i++) { | |
02c958dd CP |
1537 | bp->queues[0].tx_ring[i].addr = 0; |
1538 | bp->queues[0].tx_ring[i].ctrl = MACB_BIT(TX_USED); | |
89e5785f | 1539 | } |
21d3515c BS |
1540 | bp->queues[0].tx_head = 0; |
1541 | bp->queues[0].tx_tail = 0; | |
02c958dd | 1542 | bp->queues[0].tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP); |
89e5785f | 1543 | |
02c958dd | 1544 | bp->rx_tail = 0; |
89e5785f HS |
1545 | } |
1546 | ||
1547 | static void macb_reset_hw(struct macb *bp) | |
1548 | { | |
02c958dd CP |
1549 | struct macb_queue *queue; |
1550 | unsigned int q; | |
1551 | ||
89e5785f HS |
1552 | /* |
1553 | * Disable RX and TX (XXX: Should we halt the transmission | |
1554 | * more gracefully?) | |
1555 | */ | |
1556 | macb_writel(bp, NCR, 0); | |
1557 | ||
1558 | /* Clear the stats registers (XXX: Update stats first?) */ | |
1559 | macb_writel(bp, NCR, MACB_BIT(CLRSTAT)); | |
1560 | ||
1561 | /* Clear all status flags */ | |
95ebcea6 JE |
1562 | macb_writel(bp, TSR, -1); |
1563 | macb_writel(bp, RSR, -1); | |
89e5785f HS |
1564 | |
1565 | /* Disable all interrupts */ | |
02c958dd CP |
1566 | for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { |
1567 | queue_writel(queue, IDR, -1); | |
1568 | queue_readl(queue, ISR); | |
24468374 NS |
1569 | if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) |
1570 | queue_writel(queue, ISR, -1); | |
02c958dd | 1571 | } |
89e5785f HS |
1572 | } |
1573 | ||
70c9f3d4 JI |
1574 | static u32 gem_mdc_clk_div(struct macb *bp) |
1575 | { | |
1576 | u32 config; | |
1577 | unsigned long pclk_hz = clk_get_rate(bp->pclk); | |
1578 | ||
1579 | if (pclk_hz <= 20000000) | |
1580 | config = GEM_BF(CLK, GEM_CLK_DIV8); | |
1581 | else if (pclk_hz <= 40000000) | |
1582 | config = GEM_BF(CLK, GEM_CLK_DIV16); | |
1583 | else if (pclk_hz <= 80000000) | |
1584 | config = GEM_BF(CLK, GEM_CLK_DIV32); | |
1585 | else if (pclk_hz <= 120000000) | |
1586 | config = GEM_BF(CLK, GEM_CLK_DIV48); | |
1587 | else if (pclk_hz <= 160000000) | |
1588 | config = GEM_BF(CLK, GEM_CLK_DIV64); | |
1589 | else | |
1590 | config = GEM_BF(CLK, GEM_CLK_DIV96); | |
1591 | ||
1592 | return config; | |
1593 | } | |
1594 | ||
1595 | static u32 macb_mdc_clk_div(struct macb *bp) | |
1596 | { | |
1597 | u32 config; | |
1598 | unsigned long pclk_hz; | |
1599 | ||
1600 | if (macb_is_gem(bp)) | |
1601 | return gem_mdc_clk_div(bp); | |
1602 | ||
1603 | pclk_hz = clk_get_rate(bp->pclk); | |
1604 | if (pclk_hz <= 20000000) | |
1605 | config = MACB_BF(CLK, MACB_CLK_DIV8); | |
1606 | else if (pclk_hz <= 40000000) | |
1607 | config = MACB_BF(CLK, MACB_CLK_DIV16); | |
1608 | else if (pclk_hz <= 80000000) | |
1609 | config = MACB_BF(CLK, MACB_CLK_DIV32); | |
1610 | else | |
1611 | config = MACB_BF(CLK, MACB_CLK_DIV64); | |
1612 | ||
1613 | return config; | |
1614 | } | |
1615 | ||
757a03c6 JI |
1616 | /* |
1617 | * Get the DMA bus width field of the network configuration register that we | |
1618 | * should program. We find the width from decoding the design configuration | |
1619 | * register to find the maximum supported data bus width. | |
1620 | */ | |
1621 | static u32 macb_dbw(struct macb *bp) | |
1622 | { | |
1623 | if (!macb_is_gem(bp)) | |
1624 | return 0; | |
1625 | ||
1626 | switch (GEM_BFEXT(DBWDEF, gem_readl(bp, DCFG1))) { | |
1627 | case 4: | |
1628 | return GEM_BF(DBW, GEM_DBW128); | |
1629 | case 2: | |
1630 | return GEM_BF(DBW, GEM_DBW64); | |
1631 | case 1: | |
1632 | default: | |
1633 | return GEM_BF(DBW, GEM_DBW32); | |
1634 | } | |
1635 | } | |
1636 | ||
0116da4f | 1637 | /* |
b3e3bd71 NF |
1638 | * Configure the receive DMA engine |
1639 | * - use the correct receive buffer size | |
e175587f | 1640 | * - set best burst length for DMA operations |
b3e3bd71 NF |
1641 | * (if not supported by FIFO, it will fallback to default) |
1642 | * - set both rx/tx packet buffers to full memory size | |
1643 | * These are configurable parameters for GEM. | |
0116da4f JI |
1644 | */ |
1645 | static void macb_configure_dma(struct macb *bp) | |
1646 | { | |
1647 | u32 dmacfg; | |
1648 | ||
1649 | if (macb_is_gem(bp)) { | |
1650 | dmacfg = gem_readl(bp, DMACFG) & ~GEM_BF(RXBS, -1L); | |
1b44791a | 1651 | dmacfg |= GEM_BF(RXBS, bp->rx_buffer_size / RX_BUFFER_MULTIPLE); |
e175587f NF |
1652 | if (bp->dma_burst_length) |
1653 | dmacfg = GEM_BFINS(FBLDO, bp->dma_burst_length, dmacfg); | |
b3e3bd71 | 1654 | dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L); |
a50dad35 | 1655 | dmacfg &= ~GEM_BIT(ENDIA_PKT); |
62f6924c | 1656 | |
f2ce8a9e | 1657 | if (bp->native_io) |
62f6924c AC |
1658 | dmacfg &= ~GEM_BIT(ENDIA_DESC); |
1659 | else | |
1660 | dmacfg |= GEM_BIT(ENDIA_DESC); /* CPU in big endian */ | |
1661 | ||
85ff3d87 CP |
1662 | if (bp->dev->features & NETIF_F_HW_CSUM) |
1663 | dmacfg |= GEM_BIT(TXCOEN); | |
1664 | else | |
1665 | dmacfg &= ~GEM_BIT(TXCOEN); | |
e175587f NF |
1666 | netdev_dbg(bp->dev, "Cadence configure DMA with 0x%08x\n", |
1667 | dmacfg); | |
0116da4f JI |
1668 | gem_writel(bp, DMACFG, dmacfg); |
1669 | } | |
1670 | } | |
1671 | ||
89e5785f HS |
1672 | static void macb_init_hw(struct macb *bp) |
1673 | { | |
02c958dd CP |
1674 | struct macb_queue *queue; |
1675 | unsigned int q; | |
1676 | ||
89e5785f HS |
1677 | u32 config; |
1678 | ||
1679 | macb_reset_hw(bp); | |
314bccc4 | 1680 | macb_set_hwaddr(bp); |
89e5785f | 1681 | |
70c9f3d4 | 1682 | config = macb_mdc_clk_div(bp); |
022be25c PCK |
1683 | if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) |
1684 | config |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL); | |
29bc2e1e | 1685 | config |= MACB_BF(RBOF, NET_IP_ALIGN); /* Make eth data aligned */ |
89e5785f HS |
1686 | config |= MACB_BIT(PAE); /* PAuse Enable */ |
1687 | config |= MACB_BIT(DRFCS); /* Discard Rx FCS */ | |
a104a6b3 | 1688 | if (bp->caps & MACB_CAPS_JUMBO) |
98b5a0f4 HK |
1689 | config |= MACB_BIT(JFRAME); /* Enable jumbo frames */ |
1690 | else | |
1691 | config |= MACB_BIT(BIG); /* Receive oversized frames */ | |
89e5785f HS |
1692 | if (bp->dev->flags & IFF_PROMISC) |
1693 | config |= MACB_BIT(CAF); /* Copy All Frames */ | |
924ec53c CP |
1694 | else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM) |
1695 | config |= GEM_BIT(RXCOEN); | |
89e5785f HS |
1696 | if (!(bp->dev->flags & IFF_BROADCAST)) |
1697 | config |= MACB_BIT(NBC); /* No BroadCast */ | |
757a03c6 | 1698 | config |= macb_dbw(bp); |
89e5785f | 1699 | macb_writel(bp, NCFGR, config); |
a104a6b3 | 1700 | if ((bp->caps & MACB_CAPS_JUMBO) && bp->jumbo_max_len) |
98b5a0f4 | 1701 | gem_writel(bp, JML, bp->jumbo_max_len); |
26cdfb49 VD |
1702 | bp->speed = SPEED_10; |
1703 | bp->duplex = DUPLEX_HALF; | |
98b5a0f4 | 1704 | bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK; |
a104a6b3 | 1705 | if (bp->caps & MACB_CAPS_JUMBO) |
98b5a0f4 | 1706 | bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK; |
89e5785f | 1707 | |
0116da4f JI |
1708 | macb_configure_dma(bp); |
1709 | ||
89e5785f HS |
1710 | /* Initialize TX and RX buffers */ |
1711 | macb_writel(bp, RBQP, bp->rx_ring_dma); | |
02c958dd CP |
1712 | for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { |
1713 | queue_writel(queue, TBQP, queue->tx_ring_dma); | |
1714 | ||
1715 | /* Enable interrupts */ | |
1716 | queue_writel(queue, IER, | |
1717 | MACB_RX_INT_FLAGS | | |
1718 | MACB_TX_INT_FLAGS | | |
1719 | MACB_BIT(HRESP)); | |
1720 | } | |
89e5785f HS |
1721 | |
1722 | /* Enable TX and RX */ | |
6c36a707 | 1723 | macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE) | MACB_BIT(MPE)); |
89e5785f HS |
1724 | } |
1725 | ||
446ebd01 PV |
1726 | /* |
1727 | * The hash address register is 64 bits long and takes up two | |
1728 | * locations in the memory map. The least significant bits are stored | |
1729 | * in EMAC_HSL and the most significant bits in EMAC_HSH. | |
1730 | * | |
1731 | * The unicast hash enable and the multicast hash enable bits in the | |
1732 | * network configuration register enable the reception of hash matched | |
1733 | * frames. The destination address is reduced to a 6 bit index into | |
1734 | * the 64 bit hash register using the following hash function. The | |
1735 | * hash function is an exclusive or of every sixth bit of the | |
1736 | * destination address. | |
1737 | * | |
1738 | * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47] | |
1739 | * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46] | |
1740 | * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45] | |
1741 | * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44] | |
1742 | * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43] | |
1743 | * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42] | |
1744 | * | |
1745 | * da[0] represents the least significant bit of the first byte | |
1746 | * received, that is, the multicast/unicast indicator, and da[47] | |
1747 | * represents the most significant bit of the last byte received. If | |
1748 | * the hash index, hi[n], points to a bit that is set in the hash | |
1749 | * register then the frame will be matched according to whether the | |
1750 | * frame is multicast or unicast. A multicast match will be signalled | |
1751 | * if the multicast hash enable bit is set, da[0] is 1 and the hash | |
1752 | * index points to a bit set in the hash register. A unicast match | |
1753 | * will be signalled if the unicast hash enable bit is set, da[0] is 0 | |
1754 | * and the hash index points to a bit set in the hash register. To | |
1755 | * receive all multicast frames, the hash register should be set with | |
1756 | * all ones and the multicast hash enable bit should be set in the | |
1757 | * network configuration register. | |
1758 | */ | |
1759 | ||
1760 | static inline int hash_bit_value(int bitnr, __u8 *addr) | |
1761 | { | |
1762 | if (addr[bitnr / 8] & (1 << (bitnr % 8))) | |
1763 | return 1; | |
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * Return the hash index value for the specified address. | |
1769 | */ | |
1770 | static int hash_get_index(__u8 *addr) | |
1771 | { | |
1772 | int i, j, bitval; | |
1773 | int hash_index = 0; | |
1774 | ||
1775 | for (j = 0; j < 6; j++) { | |
1776 | for (i = 0, bitval = 0; i < 8; i++) | |
2fa45e22 | 1777 | bitval ^= hash_bit_value(i * 6 + j, addr); |
446ebd01 PV |
1778 | |
1779 | hash_index |= (bitval << j); | |
1780 | } | |
1781 | ||
1782 | return hash_index; | |
1783 | } | |
1784 | ||
1785 | /* | |
1786 | * Add multicast addresses to the internal multicast-hash table. | |
1787 | */ | |
1788 | static void macb_sethashtable(struct net_device *dev) | |
1789 | { | |
22bedad3 | 1790 | struct netdev_hw_addr *ha; |
446ebd01 | 1791 | unsigned long mc_filter[2]; |
f9dcbcc9 | 1792 | unsigned int bitnr; |
446ebd01 PV |
1793 | struct macb *bp = netdev_priv(dev); |
1794 | ||
1795 | mc_filter[0] = mc_filter[1] = 0; | |
1796 | ||
22bedad3 JP |
1797 | netdev_for_each_mc_addr(ha, dev) { |
1798 | bitnr = hash_get_index(ha->addr); | |
446ebd01 PV |
1799 | mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); |
1800 | } | |
1801 | ||
f75ba50b JI |
1802 | macb_or_gem_writel(bp, HRB, mc_filter[0]); |
1803 | macb_or_gem_writel(bp, HRT, mc_filter[1]); | |
446ebd01 PV |
1804 | } |
1805 | ||
1806 | /* | |
1807 | * Enable/Disable promiscuous and multicast modes. | |
1808 | */ | |
421d9df0 | 1809 | static void macb_set_rx_mode(struct net_device *dev) |
446ebd01 PV |
1810 | { |
1811 | unsigned long cfg; | |
1812 | struct macb *bp = netdev_priv(dev); | |
1813 | ||
1814 | cfg = macb_readl(bp, NCFGR); | |
1815 | ||
924ec53c | 1816 | if (dev->flags & IFF_PROMISC) { |
446ebd01 PV |
1817 | /* Enable promiscuous mode */ |
1818 | cfg |= MACB_BIT(CAF); | |
924ec53c CP |
1819 | |
1820 | /* Disable RX checksum offload */ | |
1821 | if (macb_is_gem(bp)) | |
1822 | cfg &= ~GEM_BIT(RXCOEN); | |
1823 | } else { | |
1824 | /* Disable promiscuous mode */ | |
446ebd01 PV |
1825 | cfg &= ~MACB_BIT(CAF); |
1826 | ||
924ec53c CP |
1827 | /* Enable RX checksum offload only if requested */ |
1828 | if (macb_is_gem(bp) && dev->features & NETIF_F_RXCSUM) | |
1829 | cfg |= GEM_BIT(RXCOEN); | |
1830 | } | |
1831 | ||
446ebd01 PV |
1832 | if (dev->flags & IFF_ALLMULTI) { |
1833 | /* Enable all multicast mode */ | |
f75ba50b JI |
1834 | macb_or_gem_writel(bp, HRB, -1); |
1835 | macb_or_gem_writel(bp, HRT, -1); | |
446ebd01 | 1836 | cfg |= MACB_BIT(NCFGR_MTI); |
4cd24eaf | 1837 | } else if (!netdev_mc_empty(dev)) { |
446ebd01 PV |
1838 | /* Enable specific multicasts */ |
1839 | macb_sethashtable(dev); | |
1840 | cfg |= MACB_BIT(NCFGR_MTI); | |
1841 | } else if (dev->flags & (~IFF_ALLMULTI)) { | |
1842 | /* Disable all multicast mode */ | |
f75ba50b JI |
1843 | macb_or_gem_writel(bp, HRB, 0); |
1844 | macb_or_gem_writel(bp, HRT, 0); | |
446ebd01 PV |
1845 | cfg &= ~MACB_BIT(NCFGR_MTI); |
1846 | } | |
1847 | ||
1848 | macb_writel(bp, NCFGR, cfg); | |
1849 | } | |
1850 | ||
89e5785f HS |
1851 | static int macb_open(struct net_device *dev) |
1852 | { | |
1853 | struct macb *bp = netdev_priv(dev); | |
4df95131 | 1854 | size_t bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN; |
89e5785f HS |
1855 | int err; |
1856 | ||
c220f8cd | 1857 | netdev_dbg(bp->dev, "open\n"); |
89e5785f | 1858 | |
03fc4721 NF |
1859 | /* carrier starts down */ |
1860 | netif_carrier_off(dev); | |
1861 | ||
6c36a707 R |
1862 | /* if the phy is not yet register, retry later*/ |
1863 | if (!bp->phy_dev) | |
1864 | return -EAGAIN; | |
1b44791a NF |
1865 | |
1866 | /* RX buffers initialization */ | |
4df95131 | 1867 | macb_init_rx_buffer_size(bp, bufsz); |
6c36a707 | 1868 | |
89e5785f HS |
1869 | err = macb_alloc_consistent(bp); |
1870 | if (err) { | |
c220f8cd JI |
1871 | netdev_err(dev, "Unable to allocate DMA memory (error %d)\n", |
1872 | err); | |
89e5785f HS |
1873 | return err; |
1874 | } | |
1875 | ||
bea3348e SH |
1876 | napi_enable(&bp->napi); |
1877 | ||
4df95131 | 1878 | bp->macbgem_ops.mog_init_rings(bp); |
89e5785f | 1879 | macb_init_hw(bp); |
89e5785f | 1880 | |
6c36a707 R |
1881 | /* schedule a link state check */ |
1882 | phy_start(bp->phy_dev); | |
89e5785f | 1883 | |
02c958dd | 1884 | netif_tx_start_all_queues(dev); |
89e5785f HS |
1885 | |
1886 | return 0; | |
1887 | } | |
1888 | ||
1889 | static int macb_close(struct net_device *dev) | |
1890 | { | |
1891 | struct macb *bp = netdev_priv(dev); | |
1892 | unsigned long flags; | |
1893 | ||
02c958dd | 1894 | netif_tx_stop_all_queues(dev); |
bea3348e | 1895 | napi_disable(&bp->napi); |
89e5785f | 1896 | |
6c36a707 R |
1897 | if (bp->phy_dev) |
1898 | phy_stop(bp->phy_dev); | |
1899 | ||
89e5785f HS |
1900 | spin_lock_irqsave(&bp->lock, flags); |
1901 | macb_reset_hw(bp); | |
1902 | netif_carrier_off(dev); | |
1903 | spin_unlock_irqrestore(&bp->lock, flags); | |
1904 | ||
1905 | macb_free_consistent(bp); | |
1906 | ||
1907 | return 0; | |
1908 | } | |
1909 | ||
a5898ea0 HK |
1910 | static int macb_change_mtu(struct net_device *dev, int new_mtu) |
1911 | { | |
1912 | struct macb *bp = netdev_priv(dev); | |
1913 | u32 max_mtu; | |
1914 | ||
1915 | if (netif_running(dev)) | |
1916 | return -EBUSY; | |
1917 | ||
1918 | max_mtu = ETH_DATA_LEN; | |
a104a6b3 | 1919 | if (bp->caps & MACB_CAPS_JUMBO) |
a5898ea0 HK |
1920 | max_mtu = gem_readl(bp, JML) - ETH_HLEN - ETH_FCS_LEN; |
1921 | ||
1922 | if ((new_mtu > max_mtu) || (new_mtu < GEM_MTU_MIN_SIZE)) | |
1923 | return -EINVAL; | |
1924 | ||
1925 | dev->mtu = new_mtu; | |
1926 | ||
1927 | return 0; | |
1928 | } | |
1929 | ||
a494ed8e JI |
1930 | static void gem_update_stats(struct macb *bp) |
1931 | { | |
8bcbf82f | 1932 | unsigned int i; |
a494ed8e | 1933 | u32 *p = &bp->hw_stats.gem.tx_octets_31_0; |
a494ed8e | 1934 | |
3ff13f1c XH |
1935 | for (i = 0; i < GEM_STATS_LEN; ++i, ++p) { |
1936 | u32 offset = gem_statistics[i].offset; | |
7a6e0706 | 1937 | u64 val = bp->macb_reg_readl(bp, offset); |
3ff13f1c XH |
1938 | |
1939 | bp->ethtool_stats[i] += val; | |
1940 | *p += val; | |
1941 | ||
1942 | if (offset == GEM_OCTTXL || offset == GEM_OCTRXL) { | |
1943 | /* Add GEM_OCTTXH, GEM_OCTRXH */ | |
7a6e0706 | 1944 | val = bp->macb_reg_readl(bp, offset + 4); |
2fa45e22 | 1945 | bp->ethtool_stats[i] += ((u64)val) << 32; |
3ff13f1c XH |
1946 | *(++p) += val; |
1947 | } | |
1948 | } | |
a494ed8e JI |
1949 | } |
1950 | ||
1951 | static struct net_device_stats *gem_get_stats(struct macb *bp) | |
1952 | { | |
1953 | struct gem_stats *hwstat = &bp->hw_stats.gem; | |
1954 | struct net_device_stats *nstat = &bp->stats; | |
1955 | ||
1956 | gem_update_stats(bp); | |
1957 | ||
1958 | nstat->rx_errors = (hwstat->rx_frame_check_sequence_errors + | |
1959 | hwstat->rx_alignment_errors + | |
1960 | hwstat->rx_resource_errors + | |
1961 | hwstat->rx_overruns + | |
1962 | hwstat->rx_oversize_frames + | |
1963 | hwstat->rx_jabbers + | |
1964 | hwstat->rx_undersized_frames + | |
1965 | hwstat->rx_length_field_frame_errors); | |
1966 | nstat->tx_errors = (hwstat->tx_late_collisions + | |
1967 | hwstat->tx_excessive_collisions + | |
1968 | hwstat->tx_underrun + | |
1969 | hwstat->tx_carrier_sense_errors); | |
1970 | nstat->multicast = hwstat->rx_multicast_frames; | |
1971 | nstat->collisions = (hwstat->tx_single_collision_frames + | |
1972 | hwstat->tx_multiple_collision_frames + | |
1973 | hwstat->tx_excessive_collisions); | |
1974 | nstat->rx_length_errors = (hwstat->rx_oversize_frames + | |
1975 | hwstat->rx_jabbers + | |
1976 | hwstat->rx_undersized_frames + | |
1977 | hwstat->rx_length_field_frame_errors); | |
1978 | nstat->rx_over_errors = hwstat->rx_resource_errors; | |
1979 | nstat->rx_crc_errors = hwstat->rx_frame_check_sequence_errors; | |
1980 | nstat->rx_frame_errors = hwstat->rx_alignment_errors; | |
1981 | nstat->rx_fifo_errors = hwstat->rx_overruns; | |
1982 | nstat->tx_aborted_errors = hwstat->tx_excessive_collisions; | |
1983 | nstat->tx_carrier_errors = hwstat->tx_carrier_sense_errors; | |
1984 | nstat->tx_fifo_errors = hwstat->tx_underrun; | |
1985 | ||
1986 | return nstat; | |
1987 | } | |
1988 | ||
3ff13f1c XH |
1989 | static void gem_get_ethtool_stats(struct net_device *dev, |
1990 | struct ethtool_stats *stats, u64 *data) | |
1991 | { | |
1992 | struct macb *bp; | |
1993 | ||
1994 | bp = netdev_priv(dev); | |
1995 | gem_update_stats(bp); | |
2fa45e22 | 1996 | memcpy(data, &bp->ethtool_stats, sizeof(u64) * GEM_STATS_LEN); |
3ff13f1c XH |
1997 | } |
1998 | ||
1999 | static int gem_get_sset_count(struct net_device *dev, int sset) | |
2000 | { | |
2001 | switch (sset) { | |
2002 | case ETH_SS_STATS: | |
2003 | return GEM_STATS_LEN; | |
2004 | default: | |
2005 | return -EOPNOTSUPP; | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | static void gem_get_ethtool_strings(struct net_device *dev, u32 sset, u8 *p) | |
2010 | { | |
8bcbf82f | 2011 | unsigned int i; |
3ff13f1c XH |
2012 | |
2013 | switch (sset) { | |
2014 | case ETH_SS_STATS: | |
2015 | for (i = 0; i < GEM_STATS_LEN; i++, p += ETH_GSTRING_LEN) | |
2016 | memcpy(p, gem_statistics[i].stat_string, | |
2017 | ETH_GSTRING_LEN); | |
2018 | break; | |
2019 | } | |
2020 | } | |
2021 | ||
421d9df0 | 2022 | static struct net_device_stats *macb_get_stats(struct net_device *dev) |
89e5785f HS |
2023 | { |
2024 | struct macb *bp = netdev_priv(dev); | |
2025 | struct net_device_stats *nstat = &bp->stats; | |
a494ed8e JI |
2026 | struct macb_stats *hwstat = &bp->hw_stats.macb; |
2027 | ||
2028 | if (macb_is_gem(bp)) | |
2029 | return gem_get_stats(bp); | |
89e5785f | 2030 | |
6c36a707 R |
2031 | /* read stats from hardware */ |
2032 | macb_update_stats(bp); | |
2033 | ||
89e5785f HS |
2034 | /* Convert HW stats into netdevice stats */ |
2035 | nstat->rx_errors = (hwstat->rx_fcs_errors + | |
2036 | hwstat->rx_align_errors + | |
2037 | hwstat->rx_resource_errors + | |
2038 | hwstat->rx_overruns + | |
2039 | hwstat->rx_oversize_pkts + | |
2040 | hwstat->rx_jabbers + | |
2041 | hwstat->rx_undersize_pkts + | |
89e5785f HS |
2042 | hwstat->rx_length_mismatch); |
2043 | nstat->tx_errors = (hwstat->tx_late_cols + | |
2044 | hwstat->tx_excessive_cols + | |
2045 | hwstat->tx_underruns + | |
716723c2 WS |
2046 | hwstat->tx_carrier_errors + |
2047 | hwstat->sqe_test_errors); | |
89e5785f HS |
2048 | nstat->collisions = (hwstat->tx_single_cols + |
2049 | hwstat->tx_multiple_cols + | |
2050 | hwstat->tx_excessive_cols); | |
2051 | nstat->rx_length_errors = (hwstat->rx_oversize_pkts + | |
2052 | hwstat->rx_jabbers + | |
2053 | hwstat->rx_undersize_pkts + | |
2054 | hwstat->rx_length_mismatch); | |
b19f7f71 AS |
2055 | nstat->rx_over_errors = hwstat->rx_resource_errors + |
2056 | hwstat->rx_overruns; | |
89e5785f HS |
2057 | nstat->rx_crc_errors = hwstat->rx_fcs_errors; |
2058 | nstat->rx_frame_errors = hwstat->rx_align_errors; | |
2059 | nstat->rx_fifo_errors = hwstat->rx_overruns; | |
2060 | /* XXX: What does "missed" mean? */ | |
2061 | nstat->tx_aborted_errors = hwstat->tx_excessive_cols; | |
2062 | nstat->tx_carrier_errors = hwstat->tx_carrier_errors; | |
2063 | nstat->tx_fifo_errors = hwstat->tx_underruns; | |
2064 | /* Don't know about heartbeat or window errors... */ | |
2065 | ||
2066 | return nstat; | |
2067 | } | |
2068 | ||
2069 | static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
2070 | { | |
2071 | struct macb *bp = netdev_priv(dev); | |
6c36a707 R |
2072 | struct phy_device *phydev = bp->phy_dev; |
2073 | ||
2074 | if (!phydev) | |
2075 | return -ENODEV; | |
89e5785f | 2076 | |
6c36a707 | 2077 | return phy_ethtool_gset(phydev, cmd); |
89e5785f HS |
2078 | } |
2079 | ||
2080 | static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
2081 | { | |
2082 | struct macb *bp = netdev_priv(dev); | |
6c36a707 | 2083 | struct phy_device *phydev = bp->phy_dev; |
89e5785f | 2084 | |
6c36a707 R |
2085 | if (!phydev) |
2086 | return -ENODEV; | |
2087 | ||
2088 | return phy_ethtool_sset(phydev, cmd); | |
89e5785f HS |
2089 | } |
2090 | ||
d1d1b53d NF |
2091 | static int macb_get_regs_len(struct net_device *netdev) |
2092 | { | |
2093 | return MACB_GREGS_NBR * sizeof(u32); | |
2094 | } | |
2095 | ||
2096 | static void macb_get_regs(struct net_device *dev, struct ethtool_regs *regs, | |
2097 | void *p) | |
2098 | { | |
2099 | struct macb *bp = netdev_priv(dev); | |
2100 | unsigned int tail, head; | |
2101 | u32 *regs_buff = p; | |
2102 | ||
2103 | regs->version = (macb_readl(bp, MID) & ((1 << MACB_REV_SIZE) - 1)) | |
2104 | | MACB_GREGS_VERSION; | |
2105 | ||
02c958dd CP |
2106 | tail = macb_tx_ring_wrap(bp->queues[0].tx_tail); |
2107 | head = macb_tx_ring_wrap(bp->queues[0].tx_head); | |
d1d1b53d NF |
2108 | |
2109 | regs_buff[0] = macb_readl(bp, NCR); | |
2110 | regs_buff[1] = macb_or_gem_readl(bp, NCFGR); | |
2111 | regs_buff[2] = macb_readl(bp, NSR); | |
2112 | regs_buff[3] = macb_readl(bp, TSR); | |
2113 | regs_buff[4] = macb_readl(bp, RBQP); | |
2114 | regs_buff[5] = macb_readl(bp, TBQP); | |
2115 | regs_buff[6] = macb_readl(bp, RSR); | |
2116 | regs_buff[7] = macb_readl(bp, IMR); | |
2117 | ||
2118 | regs_buff[8] = tail; | |
2119 | regs_buff[9] = head; | |
02c958dd CP |
2120 | regs_buff[10] = macb_tx_dma(&bp->queues[0], tail); |
2121 | regs_buff[11] = macb_tx_dma(&bp->queues[0], head); | |
d1d1b53d | 2122 | |
ce721a70 NA |
2123 | if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) |
2124 | regs_buff[12] = macb_or_gem_readl(bp, USRIO); | |
d1d1b53d | 2125 | if (macb_is_gem(bp)) { |
d1d1b53d NF |
2126 | regs_buff[13] = gem_readl(bp, DMACFG); |
2127 | } | |
2128 | } | |
2129 | ||
3e2a5e15 SP |
2130 | static void macb_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol) |
2131 | { | |
2132 | struct macb *bp = netdev_priv(netdev); | |
2133 | ||
2134 | wol->supported = 0; | |
2135 | wol->wolopts = 0; | |
2136 | ||
2137 | if (bp->wol & MACB_WOL_HAS_MAGIC_PACKET) { | |
2138 | wol->supported = WAKE_MAGIC; | |
2139 | ||
2140 | if (bp->wol & MACB_WOL_ENABLED) | |
2141 | wol->wolopts |= WAKE_MAGIC; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol) | |
2146 | { | |
2147 | struct macb *bp = netdev_priv(netdev); | |
2148 | ||
2149 | if (!(bp->wol & MACB_WOL_HAS_MAGIC_PACKET) || | |
2150 | (wol->wolopts & ~WAKE_MAGIC)) | |
2151 | return -EOPNOTSUPP; | |
2152 | ||
2153 | if (wol->wolopts & WAKE_MAGIC) | |
2154 | bp->wol |= MACB_WOL_ENABLED; | |
2155 | else | |
2156 | bp->wol &= ~MACB_WOL_ENABLED; | |
2157 | ||
2158 | device_set_wakeup_enable(&bp->pdev->dev, bp->wol & MACB_WOL_ENABLED); | |
2159 | ||
2160 | return 0; | |
2161 | } | |
2162 | ||
421d9df0 | 2163 | static const struct ethtool_ops macb_ethtool_ops = { |
89e5785f HS |
2164 | .get_settings = macb_get_settings, |
2165 | .set_settings = macb_set_settings, | |
d1d1b53d NF |
2166 | .get_regs_len = macb_get_regs_len, |
2167 | .get_regs = macb_get_regs, | |
89e5785f | 2168 | .get_link = ethtool_op_get_link, |
17f393e8 | 2169 | .get_ts_info = ethtool_op_get_ts_info, |
3e2a5e15 SP |
2170 | .get_wol = macb_get_wol, |
2171 | .set_wol = macb_set_wol, | |
8cd5a56c | 2172 | }; |
8cd5a56c | 2173 | |
8093b1c3 | 2174 | static const struct ethtool_ops gem_ethtool_ops = { |
8cd5a56c XH |
2175 | .get_settings = macb_get_settings, |
2176 | .set_settings = macb_set_settings, | |
2177 | .get_regs_len = macb_get_regs_len, | |
2178 | .get_regs = macb_get_regs, | |
2179 | .get_link = ethtool_op_get_link, | |
2180 | .get_ts_info = ethtool_op_get_ts_info, | |
3ff13f1c XH |
2181 | .get_ethtool_stats = gem_get_ethtool_stats, |
2182 | .get_strings = gem_get_ethtool_strings, | |
2183 | .get_sset_count = gem_get_sset_count, | |
89e5785f HS |
2184 | }; |
2185 | ||
421d9df0 | 2186 | static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
89e5785f HS |
2187 | { |
2188 | struct macb *bp = netdev_priv(dev); | |
6c36a707 | 2189 | struct phy_device *phydev = bp->phy_dev; |
89e5785f HS |
2190 | |
2191 | if (!netif_running(dev)) | |
2192 | return -EINVAL; | |
2193 | ||
6c36a707 R |
2194 | if (!phydev) |
2195 | return -ENODEV; | |
89e5785f | 2196 | |
28b04113 | 2197 | return phy_mii_ioctl(phydev, rq, cmd); |
89e5785f HS |
2198 | } |
2199 | ||
85ff3d87 CP |
2200 | static int macb_set_features(struct net_device *netdev, |
2201 | netdev_features_t features) | |
2202 | { | |
2203 | struct macb *bp = netdev_priv(netdev); | |
2204 | netdev_features_t changed = features ^ netdev->features; | |
2205 | ||
2206 | /* TX checksum offload */ | |
2207 | if ((changed & NETIF_F_HW_CSUM) && macb_is_gem(bp)) { | |
2208 | u32 dmacfg; | |
2209 | ||
2210 | dmacfg = gem_readl(bp, DMACFG); | |
2211 | if (features & NETIF_F_HW_CSUM) | |
2212 | dmacfg |= GEM_BIT(TXCOEN); | |
2213 | else | |
2214 | dmacfg &= ~GEM_BIT(TXCOEN); | |
2215 | gem_writel(bp, DMACFG, dmacfg); | |
2216 | } | |
2217 | ||
924ec53c CP |
2218 | /* RX checksum offload */ |
2219 | if ((changed & NETIF_F_RXCSUM) && macb_is_gem(bp)) { | |
2220 | u32 netcfg; | |
2221 | ||
2222 | netcfg = gem_readl(bp, NCFGR); | |
2223 | if (features & NETIF_F_RXCSUM && | |
2224 | !(netdev->flags & IFF_PROMISC)) | |
2225 | netcfg |= GEM_BIT(RXCOEN); | |
2226 | else | |
2227 | netcfg &= ~GEM_BIT(RXCOEN); | |
2228 | gem_writel(bp, NCFGR, netcfg); | |
2229 | } | |
2230 | ||
85ff3d87 CP |
2231 | return 0; |
2232 | } | |
2233 | ||
5f1fa992 AB |
2234 | static const struct net_device_ops macb_netdev_ops = { |
2235 | .ndo_open = macb_open, | |
2236 | .ndo_stop = macb_close, | |
2237 | .ndo_start_xmit = macb_start_xmit, | |
afc4b13d | 2238 | .ndo_set_rx_mode = macb_set_rx_mode, |
5f1fa992 AB |
2239 | .ndo_get_stats = macb_get_stats, |
2240 | .ndo_do_ioctl = macb_ioctl, | |
2241 | .ndo_validate_addr = eth_validate_addr, | |
a5898ea0 | 2242 | .ndo_change_mtu = macb_change_mtu, |
5f1fa992 | 2243 | .ndo_set_mac_address = eth_mac_addr, |
6e8cf5c0 TP |
2244 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2245 | .ndo_poll_controller = macb_poll_controller, | |
2246 | #endif | |
85ff3d87 | 2247 | .ndo_set_features = macb_set_features, |
5f1fa992 AB |
2248 | }; |
2249 | ||
e175587f | 2250 | /* |
ad78347f | 2251 | * Configure peripheral capabilities according to device tree |
e175587f NF |
2252 | * and integration options used |
2253 | */ | |
f6970505 | 2254 | static void macb_configure_caps(struct macb *bp, const struct macb_config *dt_conf) |
e175587f NF |
2255 | { |
2256 | u32 dcfg; | |
e175587f | 2257 | |
f6970505 NF |
2258 | if (dt_conf) |
2259 | bp->caps = dt_conf->caps; | |
2260 | ||
f2ce8a9e | 2261 | if (hw_is_gem(bp->regs, bp->native_io)) { |
e175587f NF |
2262 | bp->caps |= MACB_CAPS_MACB_IS_GEM; |
2263 | ||
e175587f NF |
2264 | dcfg = gem_readl(bp, DCFG1); |
2265 | if (GEM_BFEXT(IRQCOR, dcfg) == 0) | |
2266 | bp->caps |= MACB_CAPS_ISR_CLEAR_ON_WRITE; | |
2267 | dcfg = gem_readl(bp, DCFG2); | |
2268 | if ((dcfg & (GEM_BIT(RX_PKT_BUFF) | GEM_BIT(TX_PKT_BUFF))) == 0) | |
2269 | bp->caps |= MACB_CAPS_FIFO_MODE; | |
2270 | } | |
2271 | ||
a35919e1 | 2272 | dev_dbg(&bp->pdev->dev, "Cadence caps 0x%08x\n", bp->caps); |
e175587f NF |
2273 | } |
2274 | ||
02c958dd | 2275 | static void macb_probe_queues(void __iomem *mem, |
f2ce8a9e | 2276 | bool native_io, |
02c958dd CP |
2277 | unsigned int *queue_mask, |
2278 | unsigned int *num_queues) | |
2279 | { | |
2280 | unsigned int hw_q; | |
02c958dd CP |
2281 | |
2282 | *queue_mask = 0x1; | |
2283 | *num_queues = 1; | |
2284 | ||
da120112 NF |
2285 | /* is it macb or gem ? |
2286 | * | |
2287 | * We need to read directly from the hardware here because | |
2288 | * we are early in the probe process and don't have the | |
2289 | * MACB_CAPS_MACB_IS_GEM flag positioned | |
2290 | */ | |
f2ce8a9e | 2291 | if (!hw_is_gem(mem, native_io)) |
02c958dd CP |
2292 | return; |
2293 | ||
2294 | /* bit 0 is never set but queue 0 always exists */ | |
a50dad35 AC |
2295 | *queue_mask = readl_relaxed(mem + GEM_DCFG6) & 0xff; |
2296 | ||
02c958dd CP |
2297 | *queue_mask |= 0x1; |
2298 | ||
2299 | for (hw_q = 1; hw_q < MACB_MAX_QUEUES; ++hw_q) | |
2300 | if (*queue_mask & (1 << hw_q)) | |
2301 | (*num_queues)++; | |
2302 | } | |
2303 | ||
c69618b3 NF |
2304 | static int macb_clk_init(struct platform_device *pdev, struct clk **pclk, |
2305 | struct clk **hclk, struct clk **tx_clk) | |
89e5785f | 2306 | { |
421d9df0 | 2307 | int err; |
89e5785f | 2308 | |
c69618b3 NF |
2309 | *pclk = devm_clk_get(&pdev->dev, "pclk"); |
2310 | if (IS_ERR(*pclk)) { | |
2311 | err = PTR_ERR(*pclk); | |
b48e0bab | 2312 | dev_err(&pdev->dev, "failed to get macb_clk (%u)\n", err); |
421d9df0 | 2313 | return err; |
0cc8674f | 2314 | } |
461845db | 2315 | |
c69618b3 NF |
2316 | *hclk = devm_clk_get(&pdev->dev, "hclk"); |
2317 | if (IS_ERR(*hclk)) { | |
2318 | err = PTR_ERR(*hclk); | |
b48e0bab | 2319 | dev_err(&pdev->dev, "failed to get hclk (%u)\n", err); |
421d9df0 | 2320 | return err; |
b48e0bab SB |
2321 | } |
2322 | ||
c69618b3 NF |
2323 | *tx_clk = devm_clk_get(&pdev->dev, "tx_clk"); |
2324 | if (IS_ERR(*tx_clk)) | |
2325 | *tx_clk = NULL; | |
e1824dfe | 2326 | |
c69618b3 | 2327 | err = clk_prepare_enable(*pclk); |
b48e0bab SB |
2328 | if (err) { |
2329 | dev_err(&pdev->dev, "failed to enable pclk (%u)\n", err); | |
421d9df0 | 2330 | return err; |
b48e0bab SB |
2331 | } |
2332 | ||
c69618b3 | 2333 | err = clk_prepare_enable(*hclk); |
b48e0bab SB |
2334 | if (err) { |
2335 | dev_err(&pdev->dev, "failed to enable hclk (%u)\n", err); | |
421d9df0 | 2336 | goto err_disable_pclk; |
89e5785f | 2337 | } |
89e5785f | 2338 | |
c69618b3 | 2339 | err = clk_prepare_enable(*tx_clk); |
93b31f48 CP |
2340 | if (err) { |
2341 | dev_err(&pdev->dev, "failed to enable tx_clk (%u)\n", err); | |
421d9df0 | 2342 | goto err_disable_hclk; |
e1824dfe SB |
2343 | } |
2344 | ||
c69618b3 NF |
2345 | return 0; |
2346 | ||
2347 | err_disable_hclk: | |
2348 | clk_disable_unprepare(*hclk); | |
2349 | ||
2350 | err_disable_pclk: | |
2351 | clk_disable_unprepare(*pclk); | |
2352 | ||
2353 | return err; | |
2354 | } | |
2355 | ||
2356 | static int macb_init(struct platform_device *pdev) | |
2357 | { | |
2358 | struct net_device *dev = platform_get_drvdata(pdev); | |
2359 | unsigned int hw_q, q; | |
2360 | struct macb *bp = netdev_priv(dev); | |
2361 | struct macb_queue *queue; | |
2362 | int err; | |
2363 | u32 val; | |
2364 | ||
02c958dd CP |
2365 | /* set the queue register mapping once for all: queue0 has a special |
2366 | * register mapping but we don't want to test the queue index then | |
2367 | * compute the corresponding register offset at run time. | |
2368 | */ | |
cf250de0 | 2369 | for (hw_q = 0, q = 0; hw_q < MACB_MAX_QUEUES; ++hw_q) { |
bfa0914a | 2370 | if (!(bp->queue_mask & (1 << hw_q))) |
02c958dd CP |
2371 | continue; |
2372 | ||
cf250de0 | 2373 | queue = &bp->queues[q]; |
02c958dd CP |
2374 | queue->bp = bp; |
2375 | if (hw_q) { | |
2376 | queue->ISR = GEM_ISR(hw_q - 1); | |
2377 | queue->IER = GEM_IER(hw_q - 1); | |
2378 | queue->IDR = GEM_IDR(hw_q - 1); | |
2379 | queue->IMR = GEM_IMR(hw_q - 1); | |
2380 | queue->TBQP = GEM_TBQP(hw_q - 1); | |
2381 | } else { | |
2382 | /* queue0 uses legacy registers */ | |
2383 | queue->ISR = MACB_ISR; | |
2384 | queue->IER = MACB_IER; | |
2385 | queue->IDR = MACB_IDR; | |
2386 | queue->IMR = MACB_IMR; | |
2387 | queue->TBQP = MACB_TBQP; | |
2388 | } | |
2389 | ||
2390 | /* get irq: here we use the linux queue index, not the hardware | |
2391 | * queue index. the queue irq definitions in the device tree | |
2392 | * must remove the optional gaps that could exist in the | |
2393 | * hardware queue mask. | |
2394 | */ | |
cf250de0 | 2395 | queue->irq = platform_get_irq(pdev, q); |
02c958dd | 2396 | err = devm_request_irq(&pdev->dev, queue->irq, macb_interrupt, |
20488239 | 2397 | IRQF_SHARED, dev->name, queue); |
02c958dd CP |
2398 | if (err) { |
2399 | dev_err(&pdev->dev, | |
2400 | "Unable to request IRQ %d (error %d)\n", | |
2401 | queue->irq, err); | |
c69618b3 | 2402 | return err; |
02c958dd CP |
2403 | } |
2404 | ||
2405 | INIT_WORK(&queue->tx_error_task, macb_tx_error_task); | |
cf250de0 | 2406 | q++; |
89e5785f HS |
2407 | } |
2408 | ||
5f1fa992 | 2409 | dev->netdev_ops = &macb_netdev_ops; |
bea3348e | 2410 | netif_napi_add(dev, &bp->napi, macb_poll, 64); |
89e5785f | 2411 | |
4df95131 NF |
2412 | /* setup appropriated routines according to adapter type */ |
2413 | if (macb_is_gem(bp)) { | |
a4c35ed3 | 2414 | bp->max_tx_length = GEM_MAX_TX_LEN; |
4df95131 NF |
2415 | bp->macbgem_ops.mog_alloc_rx_buffers = gem_alloc_rx_buffers; |
2416 | bp->macbgem_ops.mog_free_rx_buffers = gem_free_rx_buffers; | |
2417 | bp->macbgem_ops.mog_init_rings = gem_init_rings; | |
2418 | bp->macbgem_ops.mog_rx = gem_rx; | |
8cd5a56c | 2419 | dev->ethtool_ops = &gem_ethtool_ops; |
4df95131 | 2420 | } else { |
a4c35ed3 | 2421 | bp->max_tx_length = MACB_MAX_TX_LEN; |
4df95131 NF |
2422 | bp->macbgem_ops.mog_alloc_rx_buffers = macb_alloc_rx_buffers; |
2423 | bp->macbgem_ops.mog_free_rx_buffers = macb_free_rx_buffers; | |
2424 | bp->macbgem_ops.mog_init_rings = macb_init_rings; | |
2425 | bp->macbgem_ops.mog_rx = macb_rx; | |
8cd5a56c | 2426 | dev->ethtool_ops = &macb_ethtool_ops; |
4df95131 NF |
2427 | } |
2428 | ||
a4c35ed3 CP |
2429 | /* Set features */ |
2430 | dev->hw_features = NETIF_F_SG; | |
85ff3d87 CP |
2431 | /* Checksum offload is only available on gem with packet buffer */ |
2432 | if (macb_is_gem(bp) && !(bp->caps & MACB_CAPS_FIFO_MODE)) | |
924ec53c | 2433 | dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
a4c35ed3 CP |
2434 | if (bp->caps & MACB_CAPS_SG_DISABLED) |
2435 | dev->hw_features &= ~NETIF_F_SG; | |
2436 | dev->features = dev->hw_features; | |
2437 | ||
ce721a70 NA |
2438 | if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) { |
2439 | val = 0; | |
2440 | if (bp->phy_interface == PHY_INTERFACE_MODE_RGMII) | |
2441 | val = GEM_BIT(RGMII); | |
2442 | else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII && | |
6bdaa5e9 | 2443 | (bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII)) |
ce721a70 | 2444 | val = MACB_BIT(RMII); |
6bdaa5e9 | 2445 | else if (!(bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII)) |
ce721a70 | 2446 | val = MACB_BIT(MII); |
421d9df0 | 2447 | |
ce721a70 NA |
2448 | if (bp->caps & MACB_CAPS_USRIO_HAS_CLKEN) |
2449 | val |= MACB_BIT(CLKEN); | |
421d9df0 | 2450 | |
ce721a70 NA |
2451 | macb_or_gem_writel(bp, USRIO, val); |
2452 | } | |
421d9df0 | 2453 | |
89e5785f | 2454 | /* Set MII management clock divider */ |
421d9df0 CP |
2455 | val = macb_mdc_clk_div(bp); |
2456 | val |= macb_dbw(bp); | |
022be25c PCK |
2457 | if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) |
2458 | val |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL); | |
421d9df0 CP |
2459 | macb_writel(bp, NCFGR, val); |
2460 | ||
2461 | return 0; | |
421d9df0 CP |
2462 | } |
2463 | ||
2464 | #if defined(CONFIG_OF) | |
2465 | /* 1518 rounded up */ | |
2466 | #define AT91ETHER_MAX_RBUFF_SZ 0x600 | |
2467 | /* max number of receive buffers */ | |
2468 | #define AT91ETHER_MAX_RX_DESCR 9 | |
2469 | ||
2470 | /* Initialize and start the Receiver and Transmit subsystems */ | |
2471 | static int at91ether_start(struct net_device *dev) | |
2472 | { | |
2473 | struct macb *lp = netdev_priv(dev); | |
2474 | dma_addr_t addr; | |
2475 | u32 ctl; | |
2476 | int i; | |
2477 | ||
2478 | lp->rx_ring = dma_alloc_coherent(&lp->pdev->dev, | |
2479 | (AT91ETHER_MAX_RX_DESCR * | |
2480 | sizeof(struct macb_dma_desc)), | |
2481 | &lp->rx_ring_dma, GFP_KERNEL); | |
2482 | if (!lp->rx_ring) | |
2483 | return -ENOMEM; | |
2484 | ||
2485 | lp->rx_buffers = dma_alloc_coherent(&lp->pdev->dev, | |
2486 | AT91ETHER_MAX_RX_DESCR * | |
2487 | AT91ETHER_MAX_RBUFF_SZ, | |
2488 | &lp->rx_buffers_dma, GFP_KERNEL); | |
2489 | if (!lp->rx_buffers) { | |
2490 | dma_free_coherent(&lp->pdev->dev, | |
2491 | AT91ETHER_MAX_RX_DESCR * | |
2492 | sizeof(struct macb_dma_desc), | |
2493 | lp->rx_ring, lp->rx_ring_dma); | |
2494 | lp->rx_ring = NULL; | |
2495 | return -ENOMEM; | |
2496 | } | |
2497 | ||
2498 | addr = lp->rx_buffers_dma; | |
2499 | for (i = 0; i < AT91ETHER_MAX_RX_DESCR; i++) { | |
2500 | lp->rx_ring[i].addr = addr; | |
2501 | lp->rx_ring[i].ctrl = 0; | |
2502 | addr += AT91ETHER_MAX_RBUFF_SZ; | |
2503 | } | |
2504 | ||
2505 | /* Set the Wrap bit on the last descriptor */ | |
2506 | lp->rx_ring[AT91ETHER_MAX_RX_DESCR - 1].addr |= MACB_BIT(RX_WRAP); | |
2507 | ||
2508 | /* Reset buffer index */ | |
2509 | lp->rx_tail = 0; | |
2510 | ||
2511 | /* Program address of descriptor list in Rx Buffer Queue register */ | |
2512 | macb_writel(lp, RBQP, lp->rx_ring_dma); | |
2513 | ||
2514 | /* Enable Receive and Transmit */ | |
2515 | ctl = macb_readl(lp, NCR); | |
2516 | macb_writel(lp, NCR, ctl | MACB_BIT(RE) | MACB_BIT(TE)); | |
2517 | ||
2518 | return 0; | |
2519 | } | |
2520 | ||
2521 | /* Open the ethernet interface */ | |
2522 | static int at91ether_open(struct net_device *dev) | |
2523 | { | |
2524 | struct macb *lp = netdev_priv(dev); | |
2525 | u32 ctl; | |
2526 | int ret; | |
2527 | ||
2528 | /* Clear internal statistics */ | |
2529 | ctl = macb_readl(lp, NCR); | |
2530 | macb_writel(lp, NCR, ctl | MACB_BIT(CLRSTAT)); | |
2531 | ||
2532 | macb_set_hwaddr(lp); | |
2533 | ||
2534 | ret = at91ether_start(dev); | |
2535 | if (ret) | |
2536 | return ret; | |
2537 | ||
2538 | /* Enable MAC interrupts */ | |
2539 | macb_writel(lp, IER, MACB_BIT(RCOMP) | | |
2540 | MACB_BIT(RXUBR) | | |
2541 | MACB_BIT(ISR_TUND) | | |
2542 | MACB_BIT(ISR_RLE) | | |
2543 | MACB_BIT(TCOMP) | | |
2544 | MACB_BIT(ISR_ROVR) | | |
2545 | MACB_BIT(HRESP)); | |
2546 | ||
2547 | /* schedule a link state check */ | |
2548 | phy_start(lp->phy_dev); | |
2549 | ||
2550 | netif_start_queue(dev); | |
2551 | ||
2552 | return 0; | |
2553 | } | |
2554 | ||
2555 | /* Close the interface */ | |
2556 | static int at91ether_close(struct net_device *dev) | |
2557 | { | |
2558 | struct macb *lp = netdev_priv(dev); | |
2559 | u32 ctl; | |
2560 | ||
2561 | /* Disable Receiver and Transmitter */ | |
2562 | ctl = macb_readl(lp, NCR); | |
2563 | macb_writel(lp, NCR, ctl & ~(MACB_BIT(TE) | MACB_BIT(RE))); | |
2564 | ||
2565 | /* Disable MAC interrupts */ | |
2566 | macb_writel(lp, IDR, MACB_BIT(RCOMP) | | |
2567 | MACB_BIT(RXUBR) | | |
2568 | MACB_BIT(ISR_TUND) | | |
2569 | MACB_BIT(ISR_RLE) | | |
2570 | MACB_BIT(TCOMP) | | |
2571 | MACB_BIT(ISR_ROVR) | | |
2572 | MACB_BIT(HRESP)); | |
2573 | ||
2574 | netif_stop_queue(dev); | |
2575 | ||
2576 | dma_free_coherent(&lp->pdev->dev, | |
2577 | AT91ETHER_MAX_RX_DESCR * | |
2578 | sizeof(struct macb_dma_desc), | |
2579 | lp->rx_ring, lp->rx_ring_dma); | |
2580 | lp->rx_ring = NULL; | |
2581 | ||
2582 | dma_free_coherent(&lp->pdev->dev, | |
2583 | AT91ETHER_MAX_RX_DESCR * AT91ETHER_MAX_RBUFF_SZ, | |
2584 | lp->rx_buffers, lp->rx_buffers_dma); | |
2585 | lp->rx_buffers = NULL; | |
2586 | ||
2587 | return 0; | |
2588 | } | |
2589 | ||
2590 | /* Transmit packet */ | |
2591 | static int at91ether_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
2592 | { | |
2593 | struct macb *lp = netdev_priv(dev); | |
2594 | ||
2595 | if (macb_readl(lp, TSR) & MACB_BIT(RM9200_BNQ)) { | |
2596 | netif_stop_queue(dev); | |
2597 | ||
2598 | /* Store packet information (to free when Tx completed) */ | |
2599 | lp->skb = skb; | |
2600 | lp->skb_length = skb->len; | |
2601 | lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len, | |
2602 | DMA_TO_DEVICE); | |
2603 | ||
2604 | /* Set address of the data in the Transmit Address register */ | |
2605 | macb_writel(lp, TAR, lp->skb_physaddr); | |
2606 | /* Set length of the packet in the Transmit Control register */ | |
2607 | macb_writel(lp, TCR, skb->len); | |
89e5785f | 2608 | |
421d9df0 CP |
2609 | } else { |
2610 | netdev_err(dev, "%s called, but device is busy!\n", __func__); | |
2611 | return NETDEV_TX_BUSY; | |
2612 | } | |
2613 | ||
2614 | return NETDEV_TX_OK; | |
2615 | } | |
2616 | ||
2617 | /* Extract received frame from buffer descriptors and sent to upper layers. | |
2618 | * (Called from interrupt context) | |
2619 | */ | |
2620 | static void at91ether_rx(struct net_device *dev) | |
2621 | { | |
2622 | struct macb *lp = netdev_priv(dev); | |
2623 | unsigned char *p_recv; | |
2624 | struct sk_buff *skb; | |
2625 | unsigned int pktlen; | |
2626 | ||
2627 | while (lp->rx_ring[lp->rx_tail].addr & MACB_BIT(RX_USED)) { | |
2628 | p_recv = lp->rx_buffers + lp->rx_tail * AT91ETHER_MAX_RBUFF_SZ; | |
2629 | pktlen = MACB_BF(RX_FRMLEN, lp->rx_ring[lp->rx_tail].ctrl); | |
2630 | skb = netdev_alloc_skb(dev, pktlen + 2); | |
2631 | if (skb) { | |
2632 | skb_reserve(skb, 2); | |
2633 | memcpy(skb_put(skb, pktlen), p_recv, pktlen); | |
2634 | ||
2635 | skb->protocol = eth_type_trans(skb, dev); | |
2636 | lp->stats.rx_packets++; | |
2637 | lp->stats.rx_bytes += pktlen; | |
2638 | netif_rx(skb); | |
2639 | } else { | |
2640 | lp->stats.rx_dropped++; | |
2641 | } | |
2642 | ||
2643 | if (lp->rx_ring[lp->rx_tail].ctrl & MACB_BIT(RX_MHASH_MATCH)) | |
2644 | lp->stats.multicast++; | |
2645 | ||
2646 | /* reset ownership bit */ | |
2647 | lp->rx_ring[lp->rx_tail].addr &= ~MACB_BIT(RX_USED); | |
2648 | ||
2649 | /* wrap after last buffer */ | |
2650 | if (lp->rx_tail == AT91ETHER_MAX_RX_DESCR - 1) | |
2651 | lp->rx_tail = 0; | |
2652 | else | |
2653 | lp->rx_tail++; | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | /* MAC interrupt handler */ | |
2658 | static irqreturn_t at91ether_interrupt(int irq, void *dev_id) | |
2659 | { | |
2660 | struct net_device *dev = dev_id; | |
2661 | struct macb *lp = netdev_priv(dev); | |
2662 | u32 intstatus, ctl; | |
2663 | ||
2664 | /* MAC Interrupt Status register indicates what interrupts are pending. | |
2665 | * It is automatically cleared once read. | |
2666 | */ | |
2667 | intstatus = macb_readl(lp, ISR); | |
2668 | ||
2669 | /* Receive complete */ | |
2670 | if (intstatus & MACB_BIT(RCOMP)) | |
2671 | at91ether_rx(dev); | |
2672 | ||
2673 | /* Transmit complete */ | |
2674 | if (intstatus & MACB_BIT(TCOMP)) { | |
2675 | /* The TCOM bit is set even if the transmission failed */ | |
2676 | if (intstatus & (MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE))) | |
2677 | lp->stats.tx_errors++; | |
2678 | ||
2679 | if (lp->skb) { | |
2680 | dev_kfree_skb_irq(lp->skb); | |
2681 | lp->skb = NULL; | |
2682 | dma_unmap_single(NULL, lp->skb_physaddr, | |
2683 | lp->skb_length, DMA_TO_DEVICE); | |
2684 | lp->stats.tx_packets++; | |
2685 | lp->stats.tx_bytes += lp->skb_length; | |
2686 | } | |
2687 | netif_wake_queue(dev); | |
2688 | } | |
2689 | ||
2690 | /* Work-around for EMAC Errata section 41.3.1 */ | |
2691 | if (intstatus & MACB_BIT(RXUBR)) { | |
2692 | ctl = macb_readl(lp, NCR); | |
2693 | macb_writel(lp, NCR, ctl & ~MACB_BIT(RE)); | |
2694 | macb_writel(lp, NCR, ctl | MACB_BIT(RE)); | |
2695 | } | |
2696 | ||
2697 | if (intstatus & MACB_BIT(ISR_ROVR)) | |
2698 | netdev_err(dev, "ROVR error\n"); | |
2699 | ||
2700 | return IRQ_HANDLED; | |
2701 | } | |
2702 | ||
2703 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2704 | static void at91ether_poll_controller(struct net_device *dev) | |
2705 | { | |
2706 | unsigned long flags; | |
2707 | ||
2708 | local_irq_save(flags); | |
2709 | at91ether_interrupt(dev->irq, dev); | |
2710 | local_irq_restore(flags); | |
2711 | } | |
2712 | #endif | |
2713 | ||
2714 | static const struct net_device_ops at91ether_netdev_ops = { | |
2715 | .ndo_open = at91ether_open, | |
2716 | .ndo_stop = at91ether_close, | |
2717 | .ndo_start_xmit = at91ether_start_xmit, | |
2718 | .ndo_get_stats = macb_get_stats, | |
2719 | .ndo_set_rx_mode = macb_set_rx_mode, | |
2720 | .ndo_set_mac_address = eth_mac_addr, | |
2721 | .ndo_do_ioctl = macb_ioctl, | |
2722 | .ndo_validate_addr = eth_validate_addr, | |
2723 | .ndo_change_mtu = eth_change_mtu, | |
2724 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2725 | .ndo_poll_controller = at91ether_poll_controller, | |
2726 | #endif | |
2727 | }; | |
2728 | ||
c69618b3 NF |
2729 | static int at91ether_clk_init(struct platform_device *pdev, struct clk **pclk, |
2730 | struct clk **hclk, struct clk **tx_clk) | |
421d9df0 | 2731 | { |
421d9df0 | 2732 | int err; |
421d9df0 | 2733 | |
c69618b3 NF |
2734 | *hclk = NULL; |
2735 | *tx_clk = NULL; | |
2736 | ||
2737 | *pclk = devm_clk_get(&pdev->dev, "ether_clk"); | |
2738 | if (IS_ERR(*pclk)) | |
2739 | return PTR_ERR(*pclk); | |
421d9df0 | 2740 | |
c69618b3 | 2741 | err = clk_prepare_enable(*pclk); |
421d9df0 CP |
2742 | if (err) { |
2743 | dev_err(&pdev->dev, "failed to enable pclk (%u)\n", err); | |
2744 | return err; | |
2745 | } | |
2746 | ||
c69618b3 NF |
2747 | return 0; |
2748 | } | |
2749 | ||
2750 | static int at91ether_init(struct platform_device *pdev) | |
2751 | { | |
2752 | struct net_device *dev = platform_get_drvdata(pdev); | |
2753 | struct macb *bp = netdev_priv(dev); | |
2754 | int err; | |
2755 | u32 reg; | |
2756 | ||
421d9df0 CP |
2757 | dev->netdev_ops = &at91ether_netdev_ops; |
2758 | dev->ethtool_ops = &macb_ethtool_ops; | |
2759 | ||
2760 | err = devm_request_irq(&pdev->dev, dev->irq, at91ether_interrupt, | |
2761 | 0, dev->name, dev); | |
2762 | if (err) | |
c69618b3 | 2763 | return err; |
421d9df0 CP |
2764 | |
2765 | macb_writel(bp, NCR, 0); | |
2766 | ||
2767 | reg = MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG); | |
2768 | if (bp->phy_interface == PHY_INTERFACE_MODE_RMII) | |
2769 | reg |= MACB_BIT(RM9200_RMII); | |
2770 | ||
2771 | macb_writel(bp, NCFGR, reg); | |
2772 | ||
2773 | return 0; | |
421d9df0 CP |
2774 | } |
2775 | ||
3cef5c5b | 2776 | static const struct macb_config at91sam9260_config = { |
6bdaa5e9 | 2777 | .caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, |
c69618b3 | 2778 | .clk_init = macb_clk_init, |
421d9df0 CP |
2779 | .init = macb_init, |
2780 | }; | |
2781 | ||
3cef5c5b | 2782 | static const struct macb_config pc302gem_config = { |
421d9df0 CP |
2783 | .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE, |
2784 | .dma_burst_length = 16, | |
c69618b3 | 2785 | .clk_init = macb_clk_init, |
421d9df0 CP |
2786 | .init = macb_init, |
2787 | }; | |
2788 | ||
5c8fe711 | 2789 | static const struct macb_config sama5d2_config = { |
6bdaa5e9 | 2790 | .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, |
5c8fe711 CP |
2791 | .dma_burst_length = 16, |
2792 | .clk_init = macb_clk_init, | |
2793 | .init = macb_init, | |
2794 | }; | |
2795 | ||
3cef5c5b | 2796 | static const struct macb_config sama5d3_config = { |
6bdaa5e9 NF |
2797 | .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE |
2798 | | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, | |
421d9df0 | 2799 | .dma_burst_length = 16, |
c69618b3 | 2800 | .clk_init = macb_clk_init, |
421d9df0 CP |
2801 | .init = macb_init, |
2802 | }; | |
2803 | ||
3cef5c5b | 2804 | static const struct macb_config sama5d4_config = { |
6bdaa5e9 | 2805 | .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, |
421d9df0 | 2806 | .dma_burst_length = 4, |
c69618b3 | 2807 | .clk_init = macb_clk_init, |
421d9df0 CP |
2808 | .init = macb_init, |
2809 | }; | |
2810 | ||
3cef5c5b | 2811 | static const struct macb_config emac_config = { |
c69618b3 | 2812 | .clk_init = at91ether_clk_init, |
421d9df0 CP |
2813 | .init = at91ether_init, |
2814 | }; | |
2815 | ||
e611b5b8 NA |
2816 | static const struct macb_config np4_config = { |
2817 | .caps = MACB_CAPS_USRIO_DISABLED, | |
2818 | .clk_init = macb_clk_init, | |
2819 | .init = macb_init, | |
2820 | }; | |
36583eb5 | 2821 | |
7b61f9c1 | 2822 | static const struct macb_config zynqmp_config = { |
7baaa909 | 2823 | .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO, |
7b61f9c1 HK |
2824 | .dma_burst_length = 16, |
2825 | .clk_init = macb_clk_init, | |
2826 | .init = macb_init, | |
98b5a0f4 | 2827 | .jumbo_max_len = 10240, |
7b61f9c1 HK |
2828 | }; |
2829 | ||
222ca8e0 | 2830 | static const struct macb_config zynq_config = { |
7baaa909 | 2831 | .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_NO_GIGABIT_HALF, |
222ca8e0 NS |
2832 | .dma_burst_length = 16, |
2833 | .clk_init = macb_clk_init, | |
2834 | .init = macb_init, | |
2835 | }; | |
2836 | ||
421d9df0 CP |
2837 | static const struct of_device_id macb_dt_ids[] = { |
2838 | { .compatible = "cdns,at32ap7000-macb" }, | |
2839 | { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config }, | |
2840 | { .compatible = "cdns,macb" }, | |
e611b5b8 | 2841 | { .compatible = "cdns,np4-macb", .data = &np4_config }, |
421d9df0 CP |
2842 | { .compatible = "cdns,pc302-gem", .data = &pc302gem_config }, |
2843 | { .compatible = "cdns,gem", .data = &pc302gem_config }, | |
5c8fe711 | 2844 | { .compatible = "atmel,sama5d2-gem", .data = &sama5d2_config }, |
421d9df0 CP |
2845 | { .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config }, |
2846 | { .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config }, | |
2847 | { .compatible = "cdns,at91rm9200-emac", .data = &emac_config }, | |
2848 | { .compatible = "cdns,emac", .data = &emac_config }, | |
7b61f9c1 | 2849 | { .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config}, |
222ca8e0 | 2850 | { .compatible = "cdns,zynq-gem", .data = &zynq_config }, |
421d9df0 CP |
2851 | { /* sentinel */ } |
2852 | }; | |
2853 | MODULE_DEVICE_TABLE(of, macb_dt_ids); | |
2854 | #endif /* CONFIG_OF */ | |
2855 | ||
2856 | static int macb_probe(struct platform_device *pdev) | |
2857 | { | |
c69618b3 NF |
2858 | int (*clk_init)(struct platform_device *, struct clk **, |
2859 | struct clk **, struct clk **) | |
2860 | = macb_clk_init; | |
421d9df0 CP |
2861 | int (*init)(struct platform_device *) = macb_init; |
2862 | struct device_node *np = pdev->dev.of_node; | |
270c499f | 2863 | struct device_node *phy_node; |
421d9df0 | 2864 | const struct macb_config *macb_config = NULL; |
36df7455 | 2865 | struct clk *pclk, *hclk = NULL, *tx_clk = NULL; |
421d9df0 CP |
2866 | unsigned int queue_mask, num_queues; |
2867 | struct macb_platform_data *pdata; | |
f2ce8a9e | 2868 | bool native_io; |
421d9df0 CP |
2869 | struct phy_device *phydev; |
2870 | struct net_device *dev; | |
2871 | struct resource *regs; | |
2872 | void __iomem *mem; | |
2873 | const char *mac; | |
2874 | struct macb *bp; | |
2875 | int err; | |
2876 | ||
f2ce8a9e AS |
2877 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2878 | mem = devm_ioremap_resource(&pdev->dev, regs); | |
2879 | if (IS_ERR(mem)) | |
2880 | return PTR_ERR(mem); | |
2881 | ||
c69618b3 NF |
2882 | if (np) { |
2883 | const struct of_device_id *match; | |
2884 | ||
2885 | match = of_match_node(macb_dt_ids, np); | |
2886 | if (match && match->data) { | |
2887 | macb_config = match->data; | |
2888 | clk_init = macb_config->clk_init; | |
2889 | init = macb_config->init; | |
2890 | } | |
2891 | } | |
2892 | ||
2893 | err = clk_init(pdev, &pclk, &hclk, &tx_clk); | |
2894 | if (err) | |
2895 | return err; | |
2896 | ||
f2ce8a9e | 2897 | native_io = hw_is_native_io(mem); |
421d9df0 | 2898 | |
f2ce8a9e | 2899 | macb_probe_queues(mem, native_io, &queue_mask, &num_queues); |
421d9df0 | 2900 | dev = alloc_etherdev_mq(sizeof(*bp), num_queues); |
c69618b3 NF |
2901 | if (!dev) { |
2902 | err = -ENOMEM; | |
2903 | goto err_disable_clocks; | |
2904 | } | |
421d9df0 CP |
2905 | |
2906 | dev->base_addr = regs->start; | |
2907 | ||
2908 | SET_NETDEV_DEV(dev, &pdev->dev); | |
2909 | ||
2910 | bp = netdev_priv(dev); | |
2911 | bp->pdev = pdev; | |
2912 | bp->dev = dev; | |
2913 | bp->regs = mem; | |
f2ce8a9e AS |
2914 | bp->native_io = native_io; |
2915 | if (native_io) { | |
7a6e0706 DM |
2916 | bp->macb_reg_readl = hw_readl_native; |
2917 | bp->macb_reg_writel = hw_writel_native; | |
f2ce8a9e | 2918 | } else { |
7a6e0706 DM |
2919 | bp->macb_reg_readl = hw_readl; |
2920 | bp->macb_reg_writel = hw_writel; | |
f2ce8a9e | 2921 | } |
421d9df0 | 2922 | bp->num_queues = num_queues; |
bfa0914a | 2923 | bp->queue_mask = queue_mask; |
c69618b3 NF |
2924 | if (macb_config) |
2925 | bp->dma_burst_length = macb_config->dma_burst_length; | |
2926 | bp->pclk = pclk; | |
2927 | bp->hclk = hclk; | |
2928 | bp->tx_clk = tx_clk; | |
f36dbe6a | 2929 | if (macb_config) |
98b5a0f4 | 2930 | bp->jumbo_max_len = macb_config->jumbo_max_len; |
98b5a0f4 | 2931 | |
3e2a5e15 | 2932 | bp->wol = 0; |
7c4a1d0c | 2933 | if (of_get_property(np, "magic-packet", NULL)) |
3e2a5e15 SP |
2934 | bp->wol |= MACB_WOL_HAS_MAGIC_PACKET; |
2935 | device_init_wakeup(&pdev->dev, bp->wol & MACB_WOL_HAS_MAGIC_PACKET); | |
2936 | ||
421d9df0 CP |
2937 | spin_lock_init(&bp->lock); |
2938 | ||
ad78347f | 2939 | /* setup capabilities */ |
f6970505 NF |
2940 | macb_configure_caps(bp, macb_config); |
2941 | ||
421d9df0 CP |
2942 | platform_set_drvdata(pdev, dev); |
2943 | ||
2944 | dev->irq = platform_get_irq(pdev, 0); | |
c69618b3 NF |
2945 | if (dev->irq < 0) { |
2946 | err = dev->irq; | |
2947 | goto err_disable_clocks; | |
2948 | } | |
421d9df0 CP |
2949 | |
2950 | mac = of_get_mac_address(np); | |
50907043 GR |
2951 | if (mac) |
2952 | memcpy(bp->dev->dev_addr, mac, ETH_ALEN); | |
2953 | else | |
fb97a846 JCPV |
2954 | macb_get_hwaddr(bp); |
2955 | ||
5833e052 | 2956 | /* Power up the PHY if there is a GPIO reset */ |
270c499f GC |
2957 | phy_node = of_get_next_available_child(np, NULL); |
2958 | if (phy_node) { | |
2959 | int gpio = of_get_named_gpio(phy_node, "reset-gpios", 0); | |
2960 | if (gpio_is_valid(gpio)) | |
2961 | bp->reset_gpio = gpio_to_desc(gpio); | |
9a0384c0 | 2962 | gpiod_direction_output(bp->reset_gpio, 1); |
270c499f GC |
2963 | } |
2964 | of_node_put(phy_node); | |
5833e052 | 2965 | |
421d9df0 | 2966 | err = of_get_phy_mode(np); |
fb97a846 | 2967 | if (err < 0) { |
c607a0d9 | 2968 | pdata = dev_get_platdata(&pdev->dev); |
fb97a846 JCPV |
2969 | if (pdata && pdata->is_rmii) |
2970 | bp->phy_interface = PHY_INTERFACE_MODE_RMII; | |
2971 | else | |
2972 | bp->phy_interface = PHY_INTERFACE_MODE_MII; | |
2973 | } else { | |
2974 | bp->phy_interface = err; | |
2975 | } | |
6c36a707 | 2976 | |
421d9df0 CP |
2977 | /* IP specific init */ |
2978 | err = init(pdev); | |
2979 | if (err) | |
2980 | goto err_out_free_netdev; | |
89e5785f | 2981 | |
89e5785f HS |
2982 | err = register_netdev(dev); |
2983 | if (err) { | |
2984 | dev_err(&pdev->dev, "Cannot register net device, aborting.\n"); | |
c69618b3 | 2985 | goto err_out_unregister_netdev; |
89e5785f HS |
2986 | } |
2987 | ||
72ca820b NF |
2988 | err = macb_mii_init(bp); |
2989 | if (err) | |
6c36a707 | 2990 | goto err_out_unregister_netdev; |
89e5785f | 2991 | |
03fc4721 NF |
2992 | netif_carrier_off(dev); |
2993 | ||
5879823f BS |
2994 | netdev_info(dev, "Cadence %s rev 0x%08x at 0x%08lx irq %d (%pM)\n", |
2995 | macb_is_gem(bp) ? "GEM" : "MACB", macb_readl(bp, MID), | |
2996 | dev->base_addr, dev->irq, dev->dev_addr); | |
89e5785f | 2997 | |
6c36a707 | 2998 | phydev = bp->phy_dev; |
2220943a | 2999 | phy_attached_info(phydev); |
6c36a707 | 3000 | |
89e5785f HS |
3001 | return 0; |
3002 | ||
6c36a707 R |
3003 | err_out_unregister_netdev: |
3004 | unregister_netdev(dev); | |
421d9df0 | 3005 | |
cf250de0 | 3006 | err_out_free_netdev: |
02c958dd | 3007 | free_netdev(dev); |
421d9df0 | 3008 | |
c69618b3 NF |
3009 | err_disable_clocks: |
3010 | clk_disable_unprepare(tx_clk); | |
3011 | clk_disable_unprepare(hclk); | |
3012 | clk_disable_unprepare(pclk); | |
3013 | ||
89e5785f HS |
3014 | return err; |
3015 | } | |
3016 | ||
9e86d766 | 3017 | static int macb_remove(struct platform_device *pdev) |
89e5785f HS |
3018 | { |
3019 | struct net_device *dev; | |
3020 | struct macb *bp; | |
3021 | ||
3022 | dev = platform_get_drvdata(pdev); | |
3023 | ||
3024 | if (dev) { | |
3025 | bp = netdev_priv(dev); | |
84b7901f AN |
3026 | if (bp->phy_dev) |
3027 | phy_disconnect(bp->phy_dev); | |
298cf9be | 3028 | mdiobus_unregister(bp->mii_bus); |
298cf9be | 3029 | mdiobus_free(bp->mii_bus); |
5833e052 GC |
3030 | |
3031 | /* Shutdown the PHY if there is a GPIO reset */ | |
9a0384c0 | 3032 | gpiod_set_value(bp->reset_gpio, 0); |
5833e052 | 3033 | |
89e5785f | 3034 | unregister_netdev(dev); |
93b31f48 | 3035 | clk_disable_unprepare(bp->tx_clk); |
ace58010 | 3036 | clk_disable_unprepare(bp->hclk); |
ace58010 | 3037 | clk_disable_unprepare(bp->pclk); |
e965be7d | 3038 | free_netdev(dev); |
89e5785f HS |
3039 | } |
3040 | ||
3041 | return 0; | |
3042 | } | |
3043 | ||
d23823dd | 3044 | static int __maybe_unused macb_suspend(struct device *dev) |
c1f598fd | 3045 | { |
0dfc3e18 | 3046 | struct platform_device *pdev = to_platform_device(dev); |
c1f598fd HS |
3047 | struct net_device *netdev = platform_get_drvdata(pdev); |
3048 | struct macb *bp = netdev_priv(netdev); | |
3049 | ||
03fc4721 | 3050 | netif_carrier_off(netdev); |
c1f598fd HS |
3051 | netif_device_detach(netdev); |
3052 | ||
3e2a5e15 SP |
3053 | if (bp->wol & MACB_WOL_ENABLED) { |
3054 | macb_writel(bp, IER, MACB_BIT(WOL)); | |
3055 | macb_writel(bp, WOL, MACB_BIT(MAG)); | |
3056 | enable_irq_wake(bp->queues[0].irq); | |
3057 | } else { | |
3058 | clk_disable_unprepare(bp->tx_clk); | |
3059 | clk_disable_unprepare(bp->hclk); | |
3060 | clk_disable_unprepare(bp->pclk); | |
3061 | } | |
c1f598fd HS |
3062 | |
3063 | return 0; | |
3064 | } | |
3065 | ||
d23823dd | 3066 | static int __maybe_unused macb_resume(struct device *dev) |
c1f598fd | 3067 | { |
0dfc3e18 | 3068 | struct platform_device *pdev = to_platform_device(dev); |
c1f598fd HS |
3069 | struct net_device *netdev = platform_get_drvdata(pdev); |
3070 | struct macb *bp = netdev_priv(netdev); | |
3071 | ||
3e2a5e15 SP |
3072 | if (bp->wol & MACB_WOL_ENABLED) { |
3073 | macb_writel(bp, IDR, MACB_BIT(WOL)); | |
3074 | macb_writel(bp, WOL, 0); | |
3075 | disable_irq_wake(bp->queues[0].irq); | |
3076 | } else { | |
3077 | clk_prepare_enable(bp->pclk); | |
3078 | clk_prepare_enable(bp->hclk); | |
3079 | clk_prepare_enable(bp->tx_clk); | |
3080 | } | |
c1f598fd HS |
3081 | |
3082 | netif_device_attach(netdev); | |
3083 | ||
3084 | return 0; | |
3085 | } | |
c1f598fd | 3086 | |
0dfc3e18 SB |
3087 | static SIMPLE_DEV_PM_OPS(macb_pm_ops, macb_suspend, macb_resume); |
3088 | ||
89e5785f | 3089 | static struct platform_driver macb_driver = { |
9e86d766 NR |
3090 | .probe = macb_probe, |
3091 | .remove = macb_remove, | |
89e5785f HS |
3092 | .driver = { |
3093 | .name = "macb", | |
fb97a846 | 3094 | .of_match_table = of_match_ptr(macb_dt_ids), |
0dfc3e18 | 3095 | .pm = &macb_pm_ops, |
89e5785f HS |
3096 | }, |
3097 | }; | |
3098 | ||
9e86d766 | 3099 | module_platform_driver(macb_driver); |
89e5785f HS |
3100 | |
3101 | MODULE_LICENSE("GPL"); | |
f75ba50b | 3102 | MODULE_DESCRIPTION("Cadence MACB/GEM Ethernet driver"); |
e05503ef | 3103 | MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
72abb461 | 3104 | MODULE_ALIAS("platform:macb"); |