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d4c41139 KG |
1 | /* |
2 | * Aeroflex Gaisler GRETH 10/100/1G Ethernet MAC. | |
3 | * | |
0f73f2c5 | 4 | * 2005-2010 (c) Aeroflex Gaisler AB |
d4c41139 KG |
5 | * |
6 | * This driver supports GRETH 10/100 and GRETH 10/100/1G Ethernet MACs | |
7 | * available in the GRLIB VHDL IP core library. | |
8 | * | |
9 | * Full documentation of both cores can be found here: | |
10 | * http://www.gaisler.com/products/grlib/grip.pdf | |
11 | * | |
12 | * The Gigabit version supports scatter/gather DMA, any alignment of | |
13 | * buffers and checksum offloading. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2 of the License, or (at your | |
18 | * option) any later version. | |
19 | * | |
20 | * Contributors: Kristoffer Glembo | |
21 | * Daniel Hellstrom | |
22 | * Marko Isomaki | |
23 | */ | |
24 | ||
b7f080cf | 25 | #include <linux/dma-mapping.h> |
d4c41139 KG |
26 | #include <linux/module.h> |
27 | #include <linux/uaccess.h> | |
28 | #include <linux/init.h> | |
a6b7a407 | 29 | #include <linux/interrupt.h> |
d4c41139 KG |
30 | #include <linux/netdevice.h> |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/ethtool.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/io.h> | |
35 | #include <linux/crc32.h> | |
36 | #include <linux/mii.h> | |
37 | #include <linux/of_device.h> | |
38 | #include <linux/of_platform.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
d4c41139 KG |
40 | #include <asm/cacheflush.h> |
41 | #include <asm/byteorder.h> | |
42 | ||
43 | #ifdef CONFIG_SPARC | |
44 | #include <asm/idprom.h> | |
45 | #endif | |
46 | ||
47 | #include "greth.h" | |
48 | ||
49 | #define GRETH_DEF_MSG_ENABLE \ | |
50 | (NETIF_MSG_DRV | \ | |
51 | NETIF_MSG_PROBE | \ | |
52 | NETIF_MSG_LINK | \ | |
53 | NETIF_MSG_IFDOWN | \ | |
54 | NETIF_MSG_IFUP | \ | |
55 | NETIF_MSG_RX_ERR | \ | |
56 | NETIF_MSG_TX_ERR) | |
57 | ||
58 | static int greth_debug = -1; /* -1 == use GRETH_DEF_MSG_ENABLE as value */ | |
59 | module_param(greth_debug, int, 0); | |
60 | MODULE_PARM_DESC(greth_debug, "GRETH bitmapped debugging message enable value"); | |
61 | ||
62 | /* Accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */ | |
63 | static int macaddr[6]; | |
64 | module_param_array(macaddr, int, NULL, 0); | |
65 | MODULE_PARM_DESC(macaddr, "GRETH Ethernet MAC address"); | |
66 | ||
67 | static int greth_edcl = 1; | |
68 | module_param(greth_edcl, int, 0); | |
69 | MODULE_PARM_DESC(greth_edcl, "GRETH EDCL usage indicator. Set to 1 if EDCL is used."); | |
70 | ||
71 | static int greth_open(struct net_device *dev); | |
41a655ba | 72 | static netdev_tx_t greth_start_xmit(struct sk_buff *skb, |
73 | struct net_device *dev); | |
74 | static netdev_tx_t greth_start_xmit_gbit(struct sk_buff *skb, | |
75 | struct net_device *dev); | |
d4c41139 KG |
76 | static int greth_rx(struct net_device *dev, int limit); |
77 | static int greth_rx_gbit(struct net_device *dev, int limit); | |
78 | static void greth_clean_tx(struct net_device *dev); | |
79 | static void greth_clean_tx_gbit(struct net_device *dev); | |
80 | static irqreturn_t greth_interrupt(int irq, void *dev_id); | |
81 | static int greth_close(struct net_device *dev); | |
82 | static int greth_set_mac_add(struct net_device *dev, void *p); | |
83 | static void greth_set_multicast_list(struct net_device *dev); | |
84 | ||
85 | #define GRETH_REGLOAD(a) (be32_to_cpu(__raw_readl(&(a)))) | |
86 | #define GRETH_REGSAVE(a, v) (__raw_writel(cpu_to_be32(v), &(a))) | |
87 | #define GRETH_REGORIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v)))) | |
88 | #define GRETH_REGANDIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v)))) | |
89 | ||
90 | #define NEXT_TX(N) (((N) + 1) & GRETH_TXBD_NUM_MASK) | |
91 | #define SKIP_TX(N, C) (((N) + C) & GRETH_TXBD_NUM_MASK) | |
92 | #define NEXT_RX(N) (((N) + 1) & GRETH_RXBD_NUM_MASK) | |
93 | ||
94 | static void greth_print_rx_packet(void *addr, int len) | |
95 | { | |
96 | print_hex_dump(KERN_DEBUG, "RX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
97 | addr, len, true); | |
98 | } | |
99 | ||
100 | static void greth_print_tx_packet(struct sk_buff *skb) | |
101 | { | |
102 | int i; | |
103 | int length; | |
104 | ||
105 | if (skb_shinfo(skb)->nr_frags == 0) | |
106 | length = skb->len; | |
107 | else | |
108 | length = skb_headlen(skb); | |
109 | ||
110 | print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
111 | skb->data, length, true); | |
112 | ||
113 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
114 | ||
115 | print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
116 | phys_to_virt(page_to_phys(skb_shinfo(skb)->frags[i].page)) + | |
117 | skb_shinfo(skb)->frags[i].page_offset, | |
118 | length, true); | |
119 | } | |
120 | } | |
121 | ||
122 | static inline void greth_enable_tx(struct greth_private *greth) | |
123 | { | |
124 | wmb(); | |
125 | GRETH_REGORIN(greth->regs->control, GRETH_TXEN); | |
126 | } | |
127 | ||
128 | static inline void greth_disable_tx(struct greth_private *greth) | |
129 | { | |
130 | GRETH_REGANDIN(greth->regs->control, ~GRETH_TXEN); | |
131 | } | |
132 | ||
133 | static inline void greth_enable_rx(struct greth_private *greth) | |
134 | { | |
135 | wmb(); | |
136 | GRETH_REGORIN(greth->regs->control, GRETH_RXEN); | |
137 | } | |
138 | ||
139 | static inline void greth_disable_rx(struct greth_private *greth) | |
140 | { | |
141 | GRETH_REGANDIN(greth->regs->control, ~GRETH_RXEN); | |
142 | } | |
143 | ||
144 | static inline void greth_enable_irqs(struct greth_private *greth) | |
145 | { | |
146 | GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI); | |
147 | } | |
148 | ||
149 | static inline void greth_disable_irqs(struct greth_private *greth) | |
150 | { | |
151 | GRETH_REGANDIN(greth->regs->control, ~(GRETH_RXI|GRETH_TXI)); | |
152 | } | |
153 | ||
154 | static inline void greth_write_bd(u32 *bd, u32 val) | |
155 | { | |
156 | __raw_writel(cpu_to_be32(val), bd); | |
157 | } | |
158 | ||
159 | static inline u32 greth_read_bd(u32 *bd) | |
160 | { | |
161 | return be32_to_cpu(__raw_readl(bd)); | |
162 | } | |
163 | ||
164 | static void greth_clean_rings(struct greth_private *greth) | |
165 | { | |
166 | int i; | |
167 | struct greth_bd *rx_bdp = greth->rx_bd_base; | |
168 | struct greth_bd *tx_bdp = greth->tx_bd_base; | |
169 | ||
170 | if (greth->gbit_mac) { | |
171 | ||
172 | /* Free and unmap RX buffers */ | |
173 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
174 | if (greth->rx_skbuff[i] != NULL) { | |
175 | dev_kfree_skb(greth->rx_skbuff[i]); | |
176 | dma_unmap_single(greth->dev, | |
177 | greth_read_bd(&rx_bdp->addr), | |
178 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
179 | DMA_FROM_DEVICE); | |
180 | } | |
181 | } | |
182 | ||
183 | /* TX buffers */ | |
184 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
185 | ||
186 | struct sk_buff *skb = greth->tx_skbuff[greth->tx_last]; | |
187 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
188 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
189 | greth->tx_last = NEXT_TX(greth->tx_last); | |
190 | ||
191 | dma_unmap_single(greth->dev, | |
192 | greth_read_bd(&tx_bdp->addr), | |
193 | skb_headlen(skb), | |
194 | DMA_TO_DEVICE); | |
195 | ||
196 | for (i = 0; i < nr_frags; i++) { | |
197 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
198 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
199 | ||
200 | dma_unmap_page(greth->dev, | |
201 | greth_read_bd(&tx_bdp->addr), | |
202 | frag->size, | |
203 | DMA_TO_DEVICE); | |
204 | ||
205 | greth->tx_last = NEXT_TX(greth->tx_last); | |
206 | } | |
207 | greth->tx_free += nr_frags+1; | |
208 | dev_kfree_skb(skb); | |
209 | } | |
210 | ||
211 | ||
212 | } else { /* 10/100 Mbps MAC */ | |
213 | ||
214 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
215 | kfree(greth->rx_bufs[i]); | |
216 | dma_unmap_single(greth->dev, | |
217 | greth_read_bd(&rx_bdp->addr), | |
218 | MAX_FRAME_SIZE, | |
219 | DMA_FROM_DEVICE); | |
220 | } | |
221 | for (i = 0; i < GRETH_TXBD_NUM; i++, tx_bdp++) { | |
222 | kfree(greth->tx_bufs[i]); | |
223 | dma_unmap_single(greth->dev, | |
224 | greth_read_bd(&tx_bdp->addr), | |
225 | MAX_FRAME_SIZE, | |
226 | DMA_TO_DEVICE); | |
227 | } | |
228 | } | |
229 | } | |
230 | ||
231 | static int greth_init_rings(struct greth_private *greth) | |
232 | { | |
233 | struct sk_buff *skb; | |
234 | struct greth_bd *rx_bd, *tx_bd; | |
235 | u32 dma_addr; | |
236 | int i; | |
237 | ||
238 | rx_bd = greth->rx_bd_base; | |
239 | tx_bd = greth->tx_bd_base; | |
240 | ||
241 | /* Initialize descriptor rings and buffers */ | |
242 | if (greth->gbit_mac) { | |
243 | ||
244 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
245 | skb = netdev_alloc_skb(greth->netdev, MAX_FRAME_SIZE+NET_IP_ALIGN); | |
246 | if (skb == NULL) { | |
247 | if (netif_msg_ifup(greth)) | |
248 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
249 | goto cleanup; | |
250 | } | |
251 | skb_reserve(skb, NET_IP_ALIGN); | |
252 | dma_addr = dma_map_single(greth->dev, | |
253 | skb->data, | |
254 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
255 | DMA_FROM_DEVICE); | |
256 | ||
257 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
258 | if (netif_msg_ifup(greth)) | |
259 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
260 | goto cleanup; | |
261 | } | |
262 | greth->rx_skbuff[i] = skb; | |
263 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
264 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
265 | } | |
266 | ||
267 | } else { | |
268 | ||
269 | /* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */ | |
270 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
271 | ||
272 | greth->rx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
273 | ||
274 | if (greth->rx_bufs[i] == NULL) { | |
275 | if (netif_msg_ifup(greth)) | |
276 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
277 | goto cleanup; | |
278 | } | |
279 | ||
280 | dma_addr = dma_map_single(greth->dev, | |
281 | greth->rx_bufs[i], | |
282 | MAX_FRAME_SIZE, | |
283 | DMA_FROM_DEVICE); | |
284 | ||
285 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
286 | if (netif_msg_ifup(greth)) | |
287 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
288 | goto cleanup; | |
289 | } | |
290 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
291 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
292 | } | |
293 | for (i = 0; i < GRETH_TXBD_NUM; i++) { | |
294 | ||
295 | greth->tx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
296 | ||
297 | if (greth->tx_bufs[i] == NULL) { | |
298 | if (netif_msg_ifup(greth)) | |
299 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
300 | goto cleanup; | |
301 | } | |
302 | ||
303 | dma_addr = dma_map_single(greth->dev, | |
304 | greth->tx_bufs[i], | |
305 | MAX_FRAME_SIZE, | |
306 | DMA_TO_DEVICE); | |
307 | ||
308 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
309 | if (netif_msg_ifup(greth)) | |
310 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
311 | goto cleanup; | |
312 | } | |
313 | greth_write_bd(&tx_bd[i].addr, dma_addr); | |
314 | greth_write_bd(&tx_bd[i].stat, 0); | |
315 | } | |
316 | } | |
317 | greth_write_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat, | |
318 | greth_read_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat) | GRETH_BD_WR); | |
319 | ||
320 | /* Initialize pointers. */ | |
321 | greth->rx_cur = 0; | |
322 | greth->tx_next = 0; | |
323 | greth->tx_last = 0; | |
324 | greth->tx_free = GRETH_TXBD_NUM; | |
325 | ||
326 | /* Initialize descriptor base address */ | |
327 | GRETH_REGSAVE(greth->regs->tx_desc_p, greth->tx_bd_base_phys); | |
328 | GRETH_REGSAVE(greth->regs->rx_desc_p, greth->rx_bd_base_phys); | |
329 | ||
330 | return 0; | |
331 | ||
332 | cleanup: | |
333 | greth_clean_rings(greth); | |
334 | return -ENOMEM; | |
335 | } | |
336 | ||
337 | static int greth_open(struct net_device *dev) | |
338 | { | |
339 | struct greth_private *greth = netdev_priv(dev); | |
340 | int err; | |
341 | ||
342 | err = greth_init_rings(greth); | |
343 | if (err) { | |
344 | if (netif_msg_ifup(greth)) | |
345 | dev_err(&dev->dev, "Could not allocate memory for DMA rings\n"); | |
346 | return err; | |
347 | } | |
348 | ||
349 | err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev); | |
350 | if (err) { | |
351 | if (netif_msg_ifup(greth)) | |
352 | dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq); | |
353 | greth_clean_rings(greth); | |
354 | return err; | |
355 | } | |
356 | ||
357 | if (netif_msg_ifup(greth)) | |
358 | dev_dbg(&dev->dev, " starting queue\n"); | |
359 | netif_start_queue(dev); | |
360 | ||
bbe9e637 DH |
361 | GRETH_REGSAVE(greth->regs->status, 0xFF); |
362 | ||
d4c41139 KG |
363 | napi_enable(&greth->napi); |
364 | ||
365 | greth_enable_irqs(greth); | |
366 | greth_enable_tx(greth); | |
367 | greth_enable_rx(greth); | |
368 | return 0; | |
369 | ||
370 | } | |
371 | ||
372 | static int greth_close(struct net_device *dev) | |
373 | { | |
374 | struct greth_private *greth = netdev_priv(dev); | |
375 | ||
376 | napi_disable(&greth->napi); | |
377 | ||
bbe9e637 | 378 | greth_disable_irqs(greth); |
d4c41139 | 379 | greth_disable_tx(greth); |
bbe9e637 | 380 | greth_disable_rx(greth); |
d4c41139 KG |
381 | |
382 | netif_stop_queue(dev); | |
383 | ||
384 | free_irq(greth->irq, (void *) dev); | |
385 | ||
386 | greth_clean_rings(greth); | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
41a655ba | 391 | static netdev_tx_t |
392 | greth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
d4c41139 KG |
393 | { |
394 | struct greth_private *greth = netdev_priv(dev); | |
395 | struct greth_bd *bdp; | |
396 | int err = NETDEV_TX_OK; | |
0f73f2c5 DH |
397 | u32 status, dma_addr, ctrl; |
398 | unsigned long flags; | |
d4c41139 | 399 | |
0f73f2c5 DH |
400 | /* Clean TX Ring */ |
401 | greth_clean_tx(greth->netdev); | |
d4c41139 KG |
402 | |
403 | if (unlikely(greth->tx_free <= 0)) { | |
0f73f2c5 DH |
404 | spin_lock_irqsave(&greth->devlock, flags);/*save from poll/irq*/ |
405 | ctrl = GRETH_REGLOAD(greth->regs->control); | |
406 | /* Enable TX IRQ only if not already in poll() routine */ | |
407 | if (ctrl & GRETH_RXI) | |
408 | GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI); | |
d4c41139 | 409 | netif_stop_queue(dev); |
0f73f2c5 | 410 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
411 | return NETDEV_TX_BUSY; |
412 | } | |
413 | ||
414 | if (netif_msg_pktdata(greth)) | |
415 | greth_print_tx_packet(skb); | |
416 | ||
417 | ||
418 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
419 | dev->stats.tx_errors++; | |
420 | goto out; | |
421 | } | |
422 | ||
0f73f2c5 | 423 | bdp = greth->tx_bd_base + greth->tx_next; |
d4c41139 KG |
424 | dma_addr = greth_read_bd(&bdp->addr); |
425 | ||
426 | memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len); | |
427 | ||
428 | dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE); | |
429 | ||
0f73f2c5 | 430 | status = GRETH_BD_EN | GRETH_BD_IE | (skb->len & GRETH_BD_LEN); |
d4c41139 KG |
431 | |
432 | /* Wrap around descriptor ring */ | |
433 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) { | |
434 | status |= GRETH_BD_WR; | |
435 | } | |
436 | ||
437 | greth->tx_next = NEXT_TX(greth->tx_next); | |
438 | greth->tx_free--; | |
439 | ||
d4c41139 KG |
440 | /* Write descriptor control word and enable transmission */ |
441 | greth_write_bd(&bdp->stat, status); | |
0f73f2c5 | 442 | spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/ |
d4c41139 | 443 | greth_enable_tx(greth); |
0f73f2c5 | 444 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
445 | |
446 | out: | |
447 | dev_kfree_skb(skb); | |
448 | return err; | |
449 | } | |
450 | ||
451 | ||
41a655ba | 452 | static netdev_tx_t |
453 | greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) | |
d4c41139 KG |
454 | { |
455 | struct greth_private *greth = netdev_priv(dev); | |
456 | struct greth_bd *bdp; | |
0f73f2c5 | 457 | u32 status = 0, dma_addr, ctrl; |
d4c41139 | 458 | int curr_tx, nr_frags, i, err = NETDEV_TX_OK; |
0f73f2c5 | 459 | unsigned long flags; |
d4c41139 KG |
460 | |
461 | nr_frags = skb_shinfo(skb)->nr_frags; | |
462 | ||
0f73f2c5 DH |
463 | /* Clean TX Ring */ |
464 | greth_clean_tx_gbit(dev); | |
465 | ||
d4c41139 | 466 | if (greth->tx_free < nr_frags + 1) { |
0f73f2c5 DH |
467 | spin_lock_irqsave(&greth->devlock, flags);/*save from poll/irq*/ |
468 | ctrl = GRETH_REGLOAD(greth->regs->control); | |
469 | /* Enable TX IRQ only if not already in poll() routine */ | |
470 | if (ctrl & GRETH_RXI) | |
471 | GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI); | |
d4c41139 | 472 | netif_stop_queue(dev); |
0f73f2c5 | 473 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
474 | err = NETDEV_TX_BUSY; |
475 | goto out; | |
476 | } | |
477 | ||
478 | if (netif_msg_pktdata(greth)) | |
479 | greth_print_tx_packet(skb); | |
480 | ||
481 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
482 | dev->stats.tx_errors++; | |
483 | goto out; | |
484 | } | |
485 | ||
486 | /* Save skb pointer. */ | |
487 | greth->tx_skbuff[greth->tx_next] = skb; | |
488 | ||
489 | /* Linear buf */ | |
490 | if (nr_frags != 0) | |
491 | status = GRETH_TXBD_MORE; | |
492 | ||
493 | status |= GRETH_TXBD_CSALL; | |
494 | status |= skb_headlen(skb) & GRETH_BD_LEN; | |
495 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) | |
496 | status |= GRETH_BD_WR; | |
497 | ||
498 | ||
499 | bdp = greth->tx_bd_base + greth->tx_next; | |
500 | greth_write_bd(&bdp->stat, status); | |
501 | dma_addr = dma_map_single(greth->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); | |
502 | ||
503 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
504 | goto map_error; | |
505 | ||
506 | greth_write_bd(&bdp->addr, dma_addr); | |
507 | ||
508 | curr_tx = NEXT_TX(greth->tx_next); | |
509 | ||
510 | /* Frags */ | |
511 | for (i = 0; i < nr_frags; i++) { | |
512 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
513 | greth->tx_skbuff[curr_tx] = NULL; | |
514 | bdp = greth->tx_bd_base + curr_tx; | |
515 | ||
2a2bc012 | 516 | status = GRETH_TXBD_CSALL | GRETH_BD_EN; |
d4c41139 KG |
517 | status |= frag->size & GRETH_BD_LEN; |
518 | ||
519 | /* Wrap around descriptor ring */ | |
520 | if (curr_tx == GRETH_TXBD_NUM_MASK) | |
521 | status |= GRETH_BD_WR; | |
522 | ||
523 | /* More fragments left */ | |
524 | if (i < nr_frags - 1) | |
525 | status |= GRETH_TXBD_MORE; | |
0f73f2c5 DH |
526 | else |
527 | status |= GRETH_BD_IE; /* enable IRQ on last fragment */ | |
d4c41139 KG |
528 | |
529 | greth_write_bd(&bdp->stat, status); | |
530 | ||
531 | dma_addr = dma_map_page(greth->dev, | |
532 | frag->page, | |
533 | frag->page_offset, | |
534 | frag->size, | |
535 | DMA_TO_DEVICE); | |
536 | ||
537 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
538 | goto frag_map_error; | |
539 | ||
540 | greth_write_bd(&bdp->addr, dma_addr); | |
541 | ||
542 | curr_tx = NEXT_TX(curr_tx); | |
543 | } | |
544 | ||
545 | wmb(); | |
546 | ||
2a2bc012 DH |
547 | /* Enable the descriptor chain by enabling the first descriptor */ |
548 | bdp = greth->tx_bd_base + greth->tx_next; | |
549 | greth_write_bd(&bdp->stat, greth_read_bd(&bdp->stat) | GRETH_BD_EN); | |
550 | greth->tx_next = curr_tx; | |
551 | greth->tx_free -= nr_frags + 1; | |
552 | ||
553 | wmb(); | |
d4c41139 | 554 | |
0f73f2c5 | 555 | spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/ |
d4c41139 | 556 | greth_enable_tx(greth); |
0f73f2c5 | 557 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
558 | |
559 | return NETDEV_TX_OK; | |
560 | ||
561 | frag_map_error: | |
2a2bc012 | 562 | /* Unmap SKB mappings that succeeded and disable descriptor */ |
d4c41139 KG |
563 | for (i = 0; greth->tx_next + i != curr_tx; i++) { |
564 | bdp = greth->tx_bd_base + greth->tx_next + i; | |
565 | dma_unmap_single(greth->dev, | |
566 | greth_read_bd(&bdp->addr), | |
567 | greth_read_bd(&bdp->stat) & GRETH_BD_LEN, | |
568 | DMA_TO_DEVICE); | |
2a2bc012 | 569 | greth_write_bd(&bdp->stat, 0); |
d4c41139 KG |
570 | } |
571 | map_error: | |
572 | if (net_ratelimit()) | |
573 | dev_warn(greth->dev, "Could not create TX DMA mapping\n"); | |
574 | dev_kfree_skb(skb); | |
d4c41139 KG |
575 | out: |
576 | return err; | |
577 | } | |
578 | ||
d4c41139 KG |
579 | static irqreturn_t greth_interrupt(int irq, void *dev_id) |
580 | { | |
581 | struct net_device *dev = dev_id; | |
582 | struct greth_private *greth; | |
0f73f2c5 | 583 | u32 status, ctrl; |
d4c41139 KG |
584 | irqreturn_t retval = IRQ_NONE; |
585 | ||
586 | greth = netdev_priv(dev); | |
587 | ||
588 | spin_lock(&greth->devlock); | |
589 | ||
590 | /* Get the interrupt events that caused us to be here. */ | |
591 | status = GRETH_REGLOAD(greth->regs->status); | |
592 | ||
0f73f2c5 DH |
593 | /* Must see if interrupts are enabled also, INT_TX|INT_RX flags may be |
594 | * set regardless of whether IRQ is enabled or not. Especially | |
595 | * important when shared IRQ. | |
596 | */ | |
597 | ctrl = GRETH_REGLOAD(greth->regs->control); | |
d4c41139 | 598 | |
0f73f2c5 DH |
599 | /* Handle rx and tx interrupts through poll */ |
600 | if (((status & (GRETH_INT_RE | GRETH_INT_RX)) && (ctrl & GRETH_RXI)) || | |
601 | ((status & (GRETH_INT_TE | GRETH_INT_TX)) && (ctrl & GRETH_TXI))) { | |
d4c41139 KG |
602 | retval = IRQ_HANDLED; |
603 | ||
604 | /* Disable interrupts and schedule poll() */ | |
605 | greth_disable_irqs(greth); | |
606 | napi_schedule(&greth->napi); | |
607 | } | |
608 | ||
609 | mmiowb(); | |
610 | spin_unlock(&greth->devlock); | |
611 | ||
612 | return retval; | |
613 | } | |
614 | ||
615 | static void greth_clean_tx(struct net_device *dev) | |
616 | { | |
617 | struct greth_private *greth; | |
618 | struct greth_bd *bdp; | |
619 | u32 stat; | |
620 | ||
621 | greth = netdev_priv(dev); | |
622 | ||
623 | while (1) { | |
624 | bdp = greth->tx_bd_base + greth->tx_last; | |
0f73f2c5 DH |
625 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX); |
626 | mb(); | |
d4c41139 KG |
627 | stat = greth_read_bd(&bdp->stat); |
628 | ||
629 | if (unlikely(stat & GRETH_BD_EN)) | |
630 | break; | |
631 | ||
632 | if (greth->tx_free == GRETH_TXBD_NUM) | |
633 | break; | |
634 | ||
635 | /* Check status for errors */ | |
636 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
637 | dev->stats.tx_errors++; | |
638 | if (stat & GRETH_TXBD_ERR_AL) | |
639 | dev->stats.tx_aborted_errors++; | |
640 | if (stat & GRETH_TXBD_ERR_UE) | |
641 | dev->stats.tx_fifo_errors++; | |
642 | } | |
643 | dev->stats.tx_packets++; | |
644 | greth->tx_last = NEXT_TX(greth->tx_last); | |
645 | greth->tx_free++; | |
646 | } | |
647 | ||
648 | if (greth->tx_free > 0) { | |
649 | netif_wake_queue(dev); | |
650 | } | |
651 | ||
652 | } | |
653 | ||
654 | static inline void greth_update_tx_stats(struct net_device *dev, u32 stat) | |
655 | { | |
656 | /* Check status for errors */ | |
657 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
658 | dev->stats.tx_errors++; | |
659 | if (stat & GRETH_TXBD_ERR_AL) | |
660 | dev->stats.tx_aborted_errors++; | |
661 | if (stat & GRETH_TXBD_ERR_UE) | |
662 | dev->stats.tx_fifo_errors++; | |
663 | if (stat & GRETH_TXBD_ERR_LC) | |
664 | dev->stats.tx_aborted_errors++; | |
665 | } | |
666 | dev->stats.tx_packets++; | |
667 | } | |
668 | ||
669 | static void greth_clean_tx_gbit(struct net_device *dev) | |
670 | { | |
671 | struct greth_private *greth; | |
672 | struct greth_bd *bdp, *bdp_last_frag; | |
673 | struct sk_buff *skb; | |
674 | u32 stat; | |
675 | int nr_frags, i; | |
676 | ||
677 | greth = netdev_priv(dev); | |
678 | ||
679 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
680 | ||
681 | skb = greth->tx_skbuff[greth->tx_last]; | |
682 | ||
683 | nr_frags = skb_shinfo(skb)->nr_frags; | |
684 | ||
685 | /* We only clean fully completed SKBs */ | |
686 | bdp_last_frag = greth->tx_bd_base + SKIP_TX(greth->tx_last, nr_frags); | |
0f73f2c5 DH |
687 | |
688 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX); | |
689 | mb(); | |
690 | stat = greth_read_bd(&bdp_last_frag->stat); | |
d4c41139 KG |
691 | |
692 | if (stat & GRETH_BD_EN) | |
693 | break; | |
694 | ||
695 | greth->tx_skbuff[greth->tx_last] = NULL; | |
696 | ||
697 | greth_update_tx_stats(dev, stat); | |
698 | ||
699 | bdp = greth->tx_bd_base + greth->tx_last; | |
700 | ||
701 | greth->tx_last = NEXT_TX(greth->tx_last); | |
702 | ||
703 | dma_unmap_single(greth->dev, | |
704 | greth_read_bd(&bdp->addr), | |
705 | skb_headlen(skb), | |
706 | DMA_TO_DEVICE); | |
707 | ||
708 | for (i = 0; i < nr_frags; i++) { | |
709 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
710 | bdp = greth->tx_bd_base + greth->tx_last; | |
711 | ||
712 | dma_unmap_page(greth->dev, | |
713 | greth_read_bd(&bdp->addr), | |
714 | frag->size, | |
715 | DMA_TO_DEVICE); | |
716 | ||
717 | greth->tx_last = NEXT_TX(greth->tx_last); | |
718 | } | |
719 | greth->tx_free += nr_frags+1; | |
720 | dev_kfree_skb(skb); | |
721 | } | |
d4c41139 | 722 | |
0f73f2c5 DH |
723 | if (netif_queue_stopped(dev) && (greth->tx_free > (MAX_SKB_FRAGS+1))) |
724 | netif_wake_queue(dev); | |
d4c41139 KG |
725 | } |
726 | ||
727 | static int greth_rx(struct net_device *dev, int limit) | |
728 | { | |
729 | struct greth_private *greth; | |
730 | struct greth_bd *bdp; | |
731 | struct sk_buff *skb; | |
732 | int pkt_len; | |
733 | int bad, count; | |
734 | u32 status, dma_addr; | |
0f73f2c5 | 735 | unsigned long flags; |
d4c41139 KG |
736 | |
737 | greth = netdev_priv(dev); | |
738 | ||
739 | for (count = 0; count < limit; ++count) { | |
740 | ||
741 | bdp = greth->rx_bd_base + greth->rx_cur; | |
0f73f2c5 DH |
742 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX); |
743 | mb(); | |
d4c41139 | 744 | status = greth_read_bd(&bdp->stat); |
d4c41139 KG |
745 | |
746 | if (unlikely(status & GRETH_BD_EN)) { | |
747 | break; | |
748 | } | |
749 | ||
0f73f2c5 DH |
750 | dma_addr = greth_read_bd(&bdp->addr); |
751 | bad = 0; | |
752 | ||
d4c41139 KG |
753 | /* Check status for errors. */ |
754 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
755 | if (status & GRETH_RXBD_ERR_FT) { | |
756 | dev->stats.rx_length_errors++; | |
757 | bad = 1; | |
758 | } | |
759 | if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) { | |
760 | dev->stats.rx_frame_errors++; | |
761 | bad = 1; | |
762 | } | |
763 | if (status & GRETH_RXBD_ERR_CRC) { | |
764 | dev->stats.rx_crc_errors++; | |
765 | bad = 1; | |
766 | } | |
767 | } | |
768 | if (unlikely(bad)) { | |
769 | dev->stats.rx_errors++; | |
770 | ||
771 | } else { | |
772 | ||
773 | pkt_len = status & GRETH_BD_LEN; | |
774 | ||
775 | skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN); | |
776 | ||
777 | if (unlikely(skb == NULL)) { | |
778 | ||
779 | if (net_ratelimit()) | |
780 | dev_warn(&dev->dev, "low on memory - " "packet dropped\n"); | |
781 | ||
782 | dev->stats.rx_dropped++; | |
783 | ||
784 | } else { | |
785 | skb_reserve(skb, NET_IP_ALIGN); | |
786 | skb->dev = dev; | |
787 | ||
788 | dma_sync_single_for_cpu(greth->dev, | |
789 | dma_addr, | |
790 | pkt_len, | |
791 | DMA_FROM_DEVICE); | |
792 | ||
793 | if (netif_msg_pktdata(greth)) | |
794 | greth_print_rx_packet(phys_to_virt(dma_addr), pkt_len); | |
795 | ||
796 | memcpy(skb_put(skb, pkt_len), phys_to_virt(dma_addr), pkt_len); | |
797 | ||
798 | skb->protocol = eth_type_trans(skb, dev); | |
799 | dev->stats.rx_packets++; | |
800 | netif_receive_skb(skb); | |
801 | } | |
802 | } | |
803 | ||
804 | status = GRETH_BD_EN | GRETH_BD_IE; | |
805 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
806 | status |= GRETH_BD_WR; | |
807 | } | |
808 | ||
809 | wmb(); | |
810 | greth_write_bd(&bdp->stat, status); | |
811 | ||
812 | dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE); | |
813 | ||
0f73f2c5 | 814 | spin_lock_irqsave(&greth->devlock, flags); /* save from XMIT */ |
d4c41139 | 815 | greth_enable_rx(greth); |
0f73f2c5 | 816 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
817 | |
818 | greth->rx_cur = NEXT_RX(greth->rx_cur); | |
819 | } | |
820 | ||
821 | return count; | |
822 | } | |
823 | ||
824 | static inline int hw_checksummed(u32 status) | |
825 | { | |
826 | ||
827 | if (status & GRETH_RXBD_IP_FRAG) | |
828 | return 0; | |
829 | ||
830 | if (status & GRETH_RXBD_IP && status & GRETH_RXBD_IP_CSERR) | |
831 | return 0; | |
832 | ||
833 | if (status & GRETH_RXBD_UDP && status & GRETH_RXBD_UDP_CSERR) | |
834 | return 0; | |
835 | ||
836 | if (status & GRETH_RXBD_TCP && status & GRETH_RXBD_TCP_CSERR) | |
837 | return 0; | |
838 | ||
839 | return 1; | |
840 | } | |
841 | ||
842 | static int greth_rx_gbit(struct net_device *dev, int limit) | |
843 | { | |
844 | struct greth_private *greth; | |
845 | struct greth_bd *bdp; | |
846 | struct sk_buff *skb, *newskb; | |
847 | int pkt_len; | |
848 | int bad, count = 0; | |
849 | u32 status, dma_addr; | |
0f73f2c5 | 850 | unsigned long flags; |
d4c41139 KG |
851 | |
852 | greth = netdev_priv(dev); | |
853 | ||
854 | for (count = 0; count < limit; ++count) { | |
855 | ||
856 | bdp = greth->rx_bd_base + greth->rx_cur; | |
857 | skb = greth->rx_skbuff[greth->rx_cur]; | |
0f73f2c5 DH |
858 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX); |
859 | mb(); | |
d4c41139 KG |
860 | status = greth_read_bd(&bdp->stat); |
861 | bad = 0; | |
862 | ||
863 | if (status & GRETH_BD_EN) | |
864 | break; | |
865 | ||
866 | /* Check status for errors. */ | |
867 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
868 | ||
869 | if (status & GRETH_RXBD_ERR_FT) { | |
870 | dev->stats.rx_length_errors++; | |
871 | bad = 1; | |
872 | } else if (status & | |
873 | (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE | GRETH_RXBD_ERR_LE)) { | |
874 | dev->stats.rx_frame_errors++; | |
875 | bad = 1; | |
876 | } else if (status & GRETH_RXBD_ERR_CRC) { | |
877 | dev->stats.rx_crc_errors++; | |
878 | bad = 1; | |
879 | } | |
880 | } | |
881 | ||
b669e7f0 DH |
882 | /* Allocate new skb to replace current, not needed if the |
883 | * current skb can be reused */ | |
884 | if (!bad && (newskb=netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN))) { | |
d4c41139 KG |
885 | skb_reserve(newskb, NET_IP_ALIGN); |
886 | ||
887 | dma_addr = dma_map_single(greth->dev, | |
888 | newskb->data, | |
889 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
890 | DMA_FROM_DEVICE); | |
891 | ||
892 | if (!dma_mapping_error(greth->dev, dma_addr)) { | |
893 | /* Process the incoming frame. */ | |
894 | pkt_len = status & GRETH_BD_LEN; | |
895 | ||
896 | dma_unmap_single(greth->dev, | |
897 | greth_read_bd(&bdp->addr), | |
898 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
899 | DMA_FROM_DEVICE); | |
900 | ||
901 | if (netif_msg_pktdata(greth)) | |
902 | greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp->addr)), pkt_len); | |
903 | ||
904 | skb_put(skb, pkt_len); | |
905 | ||
131ae329 | 906 | if (dev->features & NETIF_F_RXCSUM && hw_checksummed(status)) |
d4c41139 KG |
907 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
908 | else | |
bc8acf2c | 909 | skb_checksum_none_assert(skb); |
d4c41139 | 910 | |
d4c41139 KG |
911 | skb->protocol = eth_type_trans(skb, dev); |
912 | dev->stats.rx_packets++; | |
913 | netif_receive_skb(skb); | |
914 | ||
915 | greth->rx_skbuff[greth->rx_cur] = newskb; | |
916 | greth_write_bd(&bdp->addr, dma_addr); | |
917 | } else { | |
918 | if (net_ratelimit()) | |
919 | dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n"); | |
920 | dev_kfree_skb(newskb); | |
b669e7f0 | 921 | /* reusing current skb, so it is a drop */ |
d4c41139 KG |
922 | dev->stats.rx_dropped++; |
923 | } | |
b669e7f0 DH |
924 | } else if (bad) { |
925 | /* Bad Frame transfer, the skb is reused */ | |
926 | dev->stats.rx_dropped++; | |
d4c41139 | 927 | } else { |
b669e7f0 DH |
928 | /* Failed Allocating a new skb. This is rather stupid |
929 | * but the current "filled" skb is reused, as if | |
930 | * transfer failure. One could argue that RX descriptor | |
931 | * table handling should be divided into cleaning and | |
932 | * filling as the TX part of the driver | |
933 | */ | |
d4c41139 KG |
934 | if (net_ratelimit()) |
935 | dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n"); | |
b669e7f0 | 936 | /* reusing current skb, so it is a drop */ |
d4c41139 KG |
937 | dev->stats.rx_dropped++; |
938 | } | |
939 | ||
940 | status = GRETH_BD_EN | GRETH_BD_IE; | |
941 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
942 | status |= GRETH_BD_WR; | |
943 | } | |
944 | ||
945 | wmb(); | |
946 | greth_write_bd(&bdp->stat, status); | |
0f73f2c5 | 947 | spin_lock_irqsave(&greth->devlock, flags); |
d4c41139 | 948 | greth_enable_rx(greth); |
0f73f2c5 | 949 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
950 | greth->rx_cur = NEXT_RX(greth->rx_cur); |
951 | } | |
952 | ||
953 | return count; | |
954 | ||
955 | } | |
956 | ||
957 | static int greth_poll(struct napi_struct *napi, int budget) | |
958 | { | |
959 | struct greth_private *greth; | |
960 | int work_done = 0; | |
0f73f2c5 DH |
961 | unsigned long flags; |
962 | u32 mask, ctrl; | |
d4c41139 KG |
963 | greth = container_of(napi, struct greth_private, napi); |
964 | ||
0f73f2c5 DH |
965 | restart_txrx_poll: |
966 | if (netif_queue_stopped(greth->netdev)) { | |
967 | if (greth->gbit_mac) | |
968 | greth_clean_tx_gbit(greth->netdev); | |
969 | else | |
970 | greth_clean_tx(greth->netdev); | |
d4c41139 KG |
971 | } |
972 | ||
d4c41139 KG |
973 | if (greth->gbit_mac) { |
974 | work_done += greth_rx_gbit(greth->netdev, budget - work_done); | |
975 | } else { | |
976 | work_done += greth_rx(greth->netdev, budget - work_done); | |
977 | } | |
978 | ||
979 | if (work_done < budget) { | |
980 | ||
0f73f2c5 | 981 | spin_lock_irqsave(&greth->devlock, flags); |
d4c41139 | 982 | |
0f73f2c5 DH |
983 | ctrl = GRETH_REGLOAD(greth->regs->control); |
984 | if (netif_queue_stopped(greth->netdev)) { | |
985 | GRETH_REGSAVE(greth->regs->control, | |
986 | ctrl | GRETH_TXI | GRETH_RXI); | |
987 | mask = GRETH_INT_RX | GRETH_INT_RE | | |
988 | GRETH_INT_TX | GRETH_INT_TE; | |
989 | } else { | |
990 | GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_RXI); | |
991 | mask = GRETH_INT_RX | GRETH_INT_RE; | |
992 | } | |
993 | ||
994 | if (GRETH_REGLOAD(greth->regs->status) & mask) { | |
995 | GRETH_REGSAVE(greth->regs->control, ctrl); | |
996 | spin_unlock_irqrestore(&greth->devlock, flags); | |
997 | goto restart_txrx_poll; | |
998 | } else { | |
999 | __napi_complete(napi); | |
1000 | spin_unlock_irqrestore(&greth->devlock, flags); | |
d4c41139 KG |
1001 | } |
1002 | } | |
1003 | ||
d4c41139 KG |
1004 | return work_done; |
1005 | } | |
1006 | ||
1007 | static int greth_set_mac_add(struct net_device *dev, void *p) | |
1008 | { | |
1009 | struct sockaddr *addr = p; | |
1010 | struct greth_private *greth; | |
1011 | struct greth_regs *regs; | |
1012 | ||
6e03718c | 1013 | greth = netdev_priv(dev); |
d4c41139 KG |
1014 | regs = (struct greth_regs *) greth->regs; |
1015 | ||
1016 | if (!is_valid_ether_addr(addr->sa_data)) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
9b9cfe7c KG |
1020 | GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); |
1021 | GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | | |
1022 | dev->dev_addr[4] << 8 | dev->dev_addr[5]); | |
d4c41139 | 1023 | |
d4c41139 KG |
1024 | return 0; |
1025 | } | |
1026 | ||
1027 | static u32 greth_hash_get_index(__u8 *addr) | |
1028 | { | |
1029 | return (ether_crc(6, addr)) & 0x3F; | |
1030 | } | |
1031 | ||
1032 | static void greth_set_hash_filter(struct net_device *dev) | |
1033 | { | |
22bedad3 | 1034 | struct netdev_hw_addr *ha; |
6e03718c | 1035 | struct greth_private *greth = netdev_priv(dev); |
d4c41139 KG |
1036 | struct greth_regs *regs = (struct greth_regs *) greth->regs; |
1037 | u32 mc_filter[2]; | |
6e03718c | 1038 | unsigned int bitnr; |
d4c41139 KG |
1039 | |
1040 | mc_filter[0] = mc_filter[1] = 0; | |
1041 | ||
22bedad3 JP |
1042 | netdev_for_each_mc_addr(ha, dev) { |
1043 | bitnr = greth_hash_get_index(ha->addr); | |
d4c41139 KG |
1044 | mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); |
1045 | } | |
1046 | ||
1047 | GRETH_REGSAVE(regs->hash_msb, mc_filter[1]); | |
1048 | GRETH_REGSAVE(regs->hash_lsb, mc_filter[0]); | |
1049 | } | |
1050 | ||
1051 | static void greth_set_multicast_list(struct net_device *dev) | |
1052 | { | |
1053 | int cfg; | |
1054 | struct greth_private *greth = netdev_priv(dev); | |
1055 | struct greth_regs *regs = (struct greth_regs *) greth->regs; | |
1056 | ||
1057 | cfg = GRETH_REGLOAD(regs->control); | |
1058 | if (dev->flags & IFF_PROMISC) | |
1059 | cfg |= GRETH_CTRL_PR; | |
1060 | else | |
1061 | cfg &= ~GRETH_CTRL_PR; | |
1062 | ||
1063 | if (greth->multicast) { | |
1064 | if (dev->flags & IFF_ALLMULTI) { | |
1065 | GRETH_REGSAVE(regs->hash_msb, -1); | |
1066 | GRETH_REGSAVE(regs->hash_lsb, -1); | |
1067 | cfg |= GRETH_CTRL_MCEN; | |
1068 | GRETH_REGSAVE(regs->control, cfg); | |
1069 | return; | |
1070 | } | |
1071 | ||
6e03718c | 1072 | if (netdev_mc_empty(dev)) { |
d4c41139 KG |
1073 | cfg &= ~GRETH_CTRL_MCEN; |
1074 | GRETH_REGSAVE(regs->control, cfg); | |
1075 | return; | |
1076 | } | |
1077 | ||
1078 | /* Setup multicast filter */ | |
1079 | greth_set_hash_filter(dev); | |
1080 | cfg |= GRETH_CTRL_MCEN; | |
1081 | } | |
1082 | GRETH_REGSAVE(regs->control, cfg); | |
1083 | } | |
1084 | ||
1085 | static u32 greth_get_msglevel(struct net_device *dev) | |
1086 | { | |
1087 | struct greth_private *greth = netdev_priv(dev); | |
1088 | return greth->msg_enable; | |
1089 | } | |
1090 | ||
1091 | static void greth_set_msglevel(struct net_device *dev, u32 value) | |
1092 | { | |
1093 | struct greth_private *greth = netdev_priv(dev); | |
1094 | greth->msg_enable = value; | |
1095 | } | |
1096 | static int greth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1097 | { | |
1098 | struct greth_private *greth = netdev_priv(dev); | |
1099 | struct phy_device *phy = greth->phy; | |
1100 | ||
1101 | if (!phy) | |
1102 | return -ENODEV; | |
1103 | ||
1104 | return phy_ethtool_gset(phy, cmd); | |
1105 | } | |
1106 | ||
1107 | static int greth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1108 | { | |
1109 | struct greth_private *greth = netdev_priv(dev); | |
1110 | struct phy_device *phy = greth->phy; | |
1111 | ||
1112 | if (!phy) | |
1113 | return -ENODEV; | |
1114 | ||
1115 | return phy_ethtool_sset(phy, cmd); | |
1116 | } | |
1117 | ||
1118 | static int greth_get_regs_len(struct net_device *dev) | |
1119 | { | |
1120 | return sizeof(struct greth_regs); | |
1121 | } | |
1122 | ||
1123 | static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1124 | { | |
1125 | struct greth_private *greth = netdev_priv(dev); | |
1126 | ||
1127 | strncpy(info->driver, dev_driver_string(greth->dev), 32); | |
1128 | strncpy(info->version, "revision: 1.0", 32); | |
1129 | strncpy(info->bus_info, greth->dev->bus->name, 32); | |
1130 | strncpy(info->fw_version, "N/A", 32); | |
1131 | info->eedump_len = 0; | |
1132 | info->regdump_len = sizeof(struct greth_regs); | |
1133 | } | |
1134 | ||
1135 | static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) | |
1136 | { | |
1137 | int i; | |
1138 | struct greth_private *greth = netdev_priv(dev); | |
1139 | u32 __iomem *greth_regs = (u32 __iomem *) greth->regs; | |
1140 | u32 *buff = p; | |
1141 | ||
1142 | for (i = 0; i < sizeof(struct greth_regs) / sizeof(u32); i++) | |
1143 | buff[i] = greth_read_bd(&greth_regs[i]); | |
1144 | } | |
1145 | ||
d4c41139 KG |
1146 | static const struct ethtool_ops greth_ethtool_ops = { |
1147 | .get_msglevel = greth_get_msglevel, | |
1148 | .set_msglevel = greth_set_msglevel, | |
1149 | .get_settings = greth_get_settings, | |
1150 | .set_settings = greth_set_settings, | |
1151 | .get_drvinfo = greth_get_drvinfo, | |
1152 | .get_regs_len = greth_get_regs_len, | |
1153 | .get_regs = greth_get_regs, | |
d4c41139 KG |
1154 | .get_link = ethtool_op_get_link, |
1155 | }; | |
1156 | ||
1157 | static struct net_device_ops greth_netdev_ops = { | |
0f73f2c5 DH |
1158 | .ndo_open = greth_open, |
1159 | .ndo_stop = greth_close, | |
1160 | .ndo_start_xmit = greth_start_xmit, | |
1161 | .ndo_set_mac_address = greth_set_mac_add, | |
1162 | .ndo_validate_addr = eth_validate_addr, | |
d4c41139 KG |
1163 | }; |
1164 | ||
1165 | static inline int wait_for_mdio(struct greth_private *greth) | |
1166 | { | |
1167 | unsigned long timeout = jiffies + 4*HZ/100; | |
1168 | while (GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_BUSY) { | |
1169 | if (time_after(jiffies, timeout)) | |
1170 | return 0; | |
1171 | } | |
1172 | return 1; | |
1173 | } | |
1174 | ||
1175 | static int greth_mdio_read(struct mii_bus *bus, int phy, int reg) | |
1176 | { | |
1177 | struct greth_private *greth = bus->priv; | |
1178 | int data; | |
1179 | ||
1180 | if (!wait_for_mdio(greth)) | |
1181 | return -EBUSY; | |
1182 | ||
1183 | GRETH_REGSAVE(greth->regs->mdio, ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 2); | |
1184 | ||
1185 | if (!wait_for_mdio(greth)) | |
1186 | return -EBUSY; | |
1187 | ||
1188 | if (!(GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_NVALID)) { | |
1189 | data = (GRETH_REGLOAD(greth->regs->mdio) >> 16) & 0xFFFF; | |
1190 | return data; | |
1191 | ||
1192 | } else { | |
1193 | return -1; | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | static int greth_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) | |
1198 | { | |
1199 | struct greth_private *greth = bus->priv; | |
1200 | ||
1201 | if (!wait_for_mdio(greth)) | |
1202 | return -EBUSY; | |
1203 | ||
1204 | GRETH_REGSAVE(greth->regs->mdio, | |
1205 | ((val & 0xFFFF) << 16) | ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 1); | |
1206 | ||
1207 | if (!wait_for_mdio(greth)) | |
1208 | return -EBUSY; | |
1209 | ||
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | static int greth_mdio_reset(struct mii_bus *bus) | |
1214 | { | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | static void greth_link_change(struct net_device *dev) | |
1219 | { | |
1220 | struct greth_private *greth = netdev_priv(dev); | |
1221 | struct phy_device *phydev = greth->phy; | |
1222 | unsigned long flags; | |
d4c41139 | 1223 | int status_change = 0; |
2436af8c | 1224 | u32 ctrl; |
d4c41139 KG |
1225 | |
1226 | spin_lock_irqsave(&greth->devlock, flags); | |
1227 | ||
1228 | if (phydev->link) { | |
1229 | ||
1230 | if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) { | |
2436af8c DH |
1231 | ctrl = GRETH_REGLOAD(greth->regs->control) & |
1232 | ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB); | |
d4c41139 KG |
1233 | |
1234 | if (phydev->duplex) | |
2436af8c | 1235 | ctrl |= GRETH_CTRL_FD; |
d4c41139 | 1236 | |
2436af8c DH |
1237 | if (phydev->speed == SPEED_100) |
1238 | ctrl |= GRETH_CTRL_SP; | |
d4c41139 | 1239 | else if (phydev->speed == SPEED_1000) |
2436af8c | 1240 | ctrl |= GRETH_CTRL_GB; |
d4c41139 | 1241 | |
2436af8c | 1242 | GRETH_REGSAVE(greth->regs->control, ctrl); |
d4c41139 KG |
1243 | greth->speed = phydev->speed; |
1244 | greth->duplex = phydev->duplex; | |
1245 | status_change = 1; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | if (phydev->link != greth->link) { | |
1250 | if (!phydev->link) { | |
1251 | greth->speed = 0; | |
1252 | greth->duplex = -1; | |
1253 | } | |
1254 | greth->link = phydev->link; | |
1255 | ||
1256 | status_change = 1; | |
1257 | } | |
1258 | ||
1259 | spin_unlock_irqrestore(&greth->devlock, flags); | |
1260 | ||
1261 | if (status_change) { | |
1262 | if (phydev->link) | |
1263 | pr_debug("%s: link up (%d/%s)\n", | |
1264 | dev->name, phydev->speed, | |
1265 | DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); | |
1266 | else | |
1267 | pr_debug("%s: link down\n", dev->name); | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | static int greth_mdio_probe(struct net_device *dev) | |
1272 | { | |
1273 | struct greth_private *greth = netdev_priv(dev); | |
1274 | struct phy_device *phy = NULL; | |
6e03718c | 1275 | int ret; |
d4c41139 KG |
1276 | |
1277 | /* Find the first PHY */ | |
6e03718c | 1278 | phy = phy_find_first(greth->mdio); |
1279 | ||
d4c41139 KG |
1280 | if (!phy) { |
1281 | if (netif_msg_probe(greth)) | |
1282 | dev_err(&dev->dev, "no PHY found\n"); | |
1283 | return -ENXIO; | |
1284 | } | |
1285 | ||
6e03718c | 1286 | ret = phy_connect_direct(dev, phy, &greth_link_change, |
1287 | 0, greth->gbit_mac ? | |
1288 | PHY_INTERFACE_MODE_GMII : | |
1289 | PHY_INTERFACE_MODE_MII); | |
1290 | if (ret) { | |
1291 | if (netif_msg_ifup(greth)) | |
1292 | dev_err(&dev->dev, "could not attach to PHY\n"); | |
1293 | return ret; | |
1294 | } | |
d4c41139 KG |
1295 | |
1296 | if (greth->gbit_mac) | |
1297 | phy->supported &= PHY_GBIT_FEATURES; | |
1298 | else | |
1299 | phy->supported &= PHY_BASIC_FEATURES; | |
1300 | ||
1301 | phy->advertising = phy->supported; | |
1302 | ||
d4c41139 KG |
1303 | greth->link = 0; |
1304 | greth->speed = 0; | |
1305 | greth->duplex = -1; | |
1306 | greth->phy = phy; | |
1307 | ||
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | static inline int phy_aneg_done(struct phy_device *phydev) | |
1312 | { | |
1313 | int retval; | |
1314 | ||
1315 | retval = phy_read(phydev, MII_BMSR); | |
1316 | ||
1317 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1318 | } | |
1319 | ||
1320 | static int greth_mdio_init(struct greth_private *greth) | |
1321 | { | |
1322 | int ret, phy; | |
1323 | unsigned long timeout; | |
1324 | ||
1325 | greth->mdio = mdiobus_alloc(); | |
1326 | if (!greth->mdio) { | |
1327 | return -ENOMEM; | |
1328 | } | |
1329 | ||
1330 | greth->mdio->name = "greth-mdio"; | |
1331 | snprintf(greth->mdio->id, MII_BUS_ID_SIZE, "%s-%d", greth->mdio->name, greth->irq); | |
1332 | greth->mdio->read = greth_mdio_read; | |
1333 | greth->mdio->write = greth_mdio_write; | |
1334 | greth->mdio->reset = greth_mdio_reset; | |
1335 | greth->mdio->priv = greth; | |
1336 | ||
1337 | greth->mdio->irq = greth->mdio_irqs; | |
1338 | ||
1339 | for (phy = 0; phy < PHY_MAX_ADDR; phy++) | |
1340 | greth->mdio->irq[phy] = PHY_POLL; | |
1341 | ||
1342 | ret = mdiobus_register(greth->mdio); | |
1343 | if (ret) { | |
1344 | goto error; | |
1345 | } | |
1346 | ||
1347 | ret = greth_mdio_probe(greth->netdev); | |
1348 | if (ret) { | |
1349 | if (netif_msg_probe(greth)) | |
1350 | dev_err(&greth->netdev->dev, "failed to probe MDIO bus\n"); | |
1351 | goto unreg_mdio; | |
1352 | } | |
1353 | ||
1354 | phy_start(greth->phy); | |
1355 | ||
1356 | /* If Ethernet debug link is used make autoneg happen right away */ | |
1357 | if (greth->edcl && greth_edcl == 1) { | |
1358 | phy_start_aneg(greth->phy); | |
1359 | timeout = jiffies + 6*HZ; | |
1360 | while (!phy_aneg_done(greth->phy) && time_before(jiffies, timeout)) { | |
1361 | } | |
1362 | genphy_read_status(greth->phy); | |
1363 | greth_link_change(greth->netdev); | |
1364 | } | |
1365 | ||
1366 | return 0; | |
1367 | ||
1368 | unreg_mdio: | |
1369 | mdiobus_unregister(greth->mdio); | |
1370 | error: | |
1371 | mdiobus_free(greth->mdio); | |
1372 | return ret; | |
1373 | } | |
1374 | ||
1375 | /* Initialize the GRETH MAC */ | |
74888760 | 1376 | static int __devinit greth_of_probe(struct platform_device *ofdev) |
d4c41139 KG |
1377 | { |
1378 | struct net_device *dev; | |
1379 | struct greth_private *greth; | |
1380 | struct greth_regs *regs; | |
1381 | ||
1382 | int i; | |
1383 | int err; | |
1384 | int tmp; | |
1385 | unsigned long timeout; | |
1386 | ||
1387 | dev = alloc_etherdev(sizeof(struct greth_private)); | |
1388 | ||
1389 | if (dev == NULL) | |
1390 | return -ENOMEM; | |
1391 | ||
1392 | greth = netdev_priv(dev); | |
1393 | greth->netdev = dev; | |
1394 | greth->dev = &ofdev->dev; | |
1395 | ||
1396 | if (greth_debug > 0) | |
1397 | greth->msg_enable = greth_debug; | |
1398 | else | |
1399 | greth->msg_enable = GRETH_DEF_MSG_ENABLE; | |
1400 | ||
1401 | spin_lock_init(&greth->devlock); | |
1402 | ||
1403 | greth->regs = of_ioremap(&ofdev->resource[0], 0, | |
1404 | resource_size(&ofdev->resource[0]), | |
1405 | "grlib-greth regs"); | |
1406 | ||
1407 | if (greth->regs == NULL) { | |
1408 | if (netif_msg_probe(greth)) | |
1409 | dev_err(greth->dev, "ioremap failure.\n"); | |
1410 | err = -EIO; | |
1411 | goto error1; | |
1412 | } | |
1413 | ||
1414 | regs = (struct greth_regs *) greth->regs; | |
19e4875f | 1415 | greth->irq = ofdev->archdata.irqs[0]; |
d4c41139 KG |
1416 | |
1417 | dev_set_drvdata(greth->dev, dev); | |
1418 | SET_NETDEV_DEV(dev, greth->dev); | |
1419 | ||
1420 | if (netif_msg_probe(greth)) | |
1421 | dev_dbg(greth->dev, "reseting controller.\n"); | |
1422 | ||
1423 | /* Reset the controller. */ | |
1424 | GRETH_REGSAVE(regs->control, GRETH_RESET); | |
1425 | ||
1426 | /* Wait for MAC to reset itself */ | |
1427 | timeout = jiffies + HZ/100; | |
1428 | while (GRETH_REGLOAD(regs->control) & GRETH_RESET) { | |
1429 | if (time_after(jiffies, timeout)) { | |
1430 | err = -EIO; | |
1431 | if (netif_msg_probe(greth)) | |
1432 | dev_err(greth->dev, "timeout when waiting for reset.\n"); | |
1433 | goto error2; | |
1434 | } | |
1435 | } | |
1436 | ||
1437 | /* Get default PHY address */ | |
1438 | greth->phyaddr = (GRETH_REGLOAD(regs->mdio) >> 11) & 0x1F; | |
1439 | ||
1440 | /* Check if we have GBIT capable MAC */ | |
1441 | tmp = GRETH_REGLOAD(regs->control); | |
1442 | greth->gbit_mac = (tmp >> 27) & 1; | |
1443 | ||
1444 | /* Check for multicast capability */ | |
1445 | greth->multicast = (tmp >> 25) & 1; | |
1446 | ||
1447 | greth->edcl = (tmp >> 31) & 1; | |
1448 | ||
1449 | /* If we have EDCL we disable the EDCL speed-duplex FSM so | |
1450 | * it doesn't interfere with the software */ | |
1451 | if (greth->edcl != 0) | |
1452 | GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX); | |
1453 | ||
1454 | /* Check if MAC can handle MDIO interrupts */ | |
1455 | greth->mdio_int_en = (tmp >> 26) & 1; | |
1456 | ||
1457 | err = greth_mdio_init(greth); | |
1458 | if (err) { | |
1459 | if (netif_msg_probe(greth)) | |
1460 | dev_err(greth->dev, "failed to register MDIO bus\n"); | |
1461 | goto error2; | |
1462 | } | |
1463 | ||
1464 | /* Allocate TX descriptor ring in coherent memory */ | |
1465 | greth->tx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev, | |
1466 | 1024, | |
1467 | &greth->tx_bd_base_phys, | |
1468 | GFP_KERNEL); | |
1469 | ||
1470 | if (!greth->tx_bd_base) { | |
1471 | if (netif_msg_probe(greth)) | |
1472 | dev_err(&dev->dev, "could not allocate descriptor memory.\n"); | |
1473 | err = -ENOMEM; | |
1474 | goto error3; | |
1475 | } | |
1476 | ||
1477 | memset(greth->tx_bd_base, 0, 1024); | |
1478 | ||
1479 | /* Allocate RX descriptor ring in coherent memory */ | |
1480 | greth->rx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev, | |
1481 | 1024, | |
1482 | &greth->rx_bd_base_phys, | |
1483 | GFP_KERNEL); | |
1484 | ||
1485 | if (!greth->rx_bd_base) { | |
1486 | if (netif_msg_probe(greth)) | |
1487 | dev_err(greth->dev, "could not allocate descriptor memory.\n"); | |
1488 | err = -ENOMEM; | |
1489 | goto error4; | |
1490 | } | |
1491 | ||
1492 | memset(greth->rx_bd_base, 0, 1024); | |
1493 | ||
1494 | /* Get MAC address from: module param, OF property or ID prom */ | |
1495 | for (i = 0; i < 6; i++) { | |
1496 | if (macaddr[i] != 0) | |
1497 | break; | |
1498 | } | |
1499 | if (i == 6) { | |
1500 | const unsigned char *addr; | |
1501 | int len; | |
61c7a080 GL |
1502 | addr = of_get_property(ofdev->dev.of_node, "local-mac-address", |
1503 | &len); | |
d4c41139 KG |
1504 | if (addr != NULL && len == 6) { |
1505 | for (i = 0; i < 6; i++) | |
1506 | macaddr[i] = (unsigned int) addr[i]; | |
1507 | } else { | |
1508 | #ifdef CONFIG_SPARC | |
1509 | for (i = 0; i < 6; i++) | |
1510 | macaddr[i] = (unsigned int) idprom->id_ethaddr[i]; | |
1511 | #endif | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | for (i = 0; i < 6; i++) | |
1516 | dev->dev_addr[i] = macaddr[i]; | |
1517 | ||
1518 | macaddr[5]++; | |
1519 | ||
1520 | if (!is_valid_ether_addr(&dev->dev_addr[0])) { | |
1521 | if (netif_msg_probe(greth)) | |
1522 | dev_err(greth->dev, "no valid ethernet address, aborting.\n"); | |
1523 | err = -EINVAL; | |
1524 | goto error5; | |
1525 | } | |
1526 | ||
1527 | GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); | |
1528 | GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | | |
1529 | dev->dev_addr[4] << 8 | dev->dev_addr[5]); | |
1530 | ||
1531 | /* Clear all pending interrupts except PHY irq */ | |
1532 | GRETH_REGSAVE(regs->status, 0xFF); | |
1533 | ||
1534 | if (greth->gbit_mac) { | |
131ae329 MM |
1535 | dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | |
1536 | NETIF_F_RXCSUM; | |
1537 | dev->features = dev->hw_features | NETIF_F_HIGHDMA; | |
d4c41139 | 1538 | greth_netdev_ops.ndo_start_xmit = greth_start_xmit_gbit; |
d4c41139 KG |
1539 | } |
1540 | ||
1541 | if (greth->multicast) { | |
1542 | greth_netdev_ops.ndo_set_multicast_list = greth_set_multicast_list; | |
1543 | dev->flags |= IFF_MULTICAST; | |
1544 | } else { | |
1545 | dev->flags &= ~IFF_MULTICAST; | |
1546 | } | |
1547 | ||
1548 | dev->netdev_ops = &greth_netdev_ops; | |
1549 | dev->ethtool_ops = &greth_ethtool_ops; | |
1550 | ||
cb5d991a TK |
1551 | err = register_netdev(dev); |
1552 | if (err) { | |
d4c41139 KG |
1553 | if (netif_msg_probe(greth)) |
1554 | dev_err(greth->dev, "netdevice registration failed.\n"); | |
d4c41139 KG |
1555 | goto error5; |
1556 | } | |
1557 | ||
1558 | /* setup NAPI */ | |
d4c41139 KG |
1559 | netif_napi_add(dev, &greth->napi, greth_poll, 64); |
1560 | ||
1561 | return 0; | |
1562 | ||
1563 | error5: | |
1564 | dma_free_coherent(greth->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1565 | error4: | |
1566 | dma_free_coherent(greth->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1567 | error3: | |
1568 | mdiobus_unregister(greth->mdio); | |
1569 | error2: | |
1570 | of_iounmap(&ofdev->resource[0], greth->regs, resource_size(&ofdev->resource[0])); | |
1571 | error1: | |
1572 | free_netdev(dev); | |
1573 | return err; | |
1574 | } | |
1575 | ||
2dc11581 | 1576 | static int __devexit greth_of_remove(struct platform_device *of_dev) |
d4c41139 KG |
1577 | { |
1578 | struct net_device *ndev = dev_get_drvdata(&of_dev->dev); | |
1579 | struct greth_private *greth = netdev_priv(ndev); | |
1580 | ||
1581 | /* Free descriptor areas */ | |
1582 | dma_free_coherent(&of_dev->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1583 | ||
1584 | dma_free_coherent(&of_dev->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1585 | ||
1586 | dev_set_drvdata(&of_dev->dev, NULL); | |
1587 | ||
1588 | if (greth->phy) | |
1589 | phy_stop(greth->phy); | |
1590 | mdiobus_unregister(greth->mdio); | |
1591 | ||
1592 | unregister_netdev(ndev); | |
1593 | free_netdev(ndev); | |
1594 | ||
1595 | of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0])); | |
1596 | ||
1597 | return 0; | |
1598 | } | |
1599 | ||
1600 | static struct of_device_id greth_of_match[] = { | |
1601 | { | |
1602 | .name = "GAISLER_ETHMAC", | |
1603 | }, | |
ad4650a8 DH |
1604 | { |
1605 | .name = "01_01d", | |
1606 | }, | |
d4c41139 KG |
1607 | {}, |
1608 | }; | |
1609 | ||
1610 | MODULE_DEVICE_TABLE(of, greth_of_match); | |
1611 | ||
74888760 | 1612 | static struct platform_driver greth_of_driver = { |
bc284f94 DM |
1613 | .driver = { |
1614 | .name = "grlib-greth", | |
1615 | .owner = THIS_MODULE, | |
1616 | .of_match_table = greth_of_match, | |
1617 | }, | |
d4c41139 KG |
1618 | .probe = greth_of_probe, |
1619 | .remove = __devexit_p(greth_of_remove), | |
d4c41139 KG |
1620 | }; |
1621 | ||
1622 | static int __init greth_init(void) | |
1623 | { | |
74888760 | 1624 | return platform_driver_register(&greth_of_driver); |
d4c41139 KG |
1625 | } |
1626 | ||
1627 | static void __exit greth_cleanup(void) | |
1628 | { | |
74888760 | 1629 | platform_driver_unregister(&greth_of_driver); |
d4c41139 KG |
1630 | } |
1631 | ||
1632 | module_init(greth_init); | |
1633 | module_exit(greth_cleanup); | |
1634 | ||
1635 | MODULE_AUTHOR("Aeroflex Gaisler AB."); | |
1636 | MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver"); | |
1637 | MODULE_LICENSE("GPL"); |