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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, | |
ab7e11d9 IC |
116 | skb_frag_address(&skb_shinfo(skb)->frags[i]), |
117 | skb_shinfo(skb)->frags[i].size, true); | |
d4c41139 KG |
118 | } |
119 | } | |
120 | ||
121 | static inline void greth_enable_tx(struct greth_private *greth) | |
122 | { | |
123 | wmb(); | |
124 | GRETH_REGORIN(greth->regs->control, GRETH_TXEN); | |
125 | } | |
126 | ||
127 | static inline void greth_disable_tx(struct greth_private *greth) | |
128 | { | |
129 | GRETH_REGANDIN(greth->regs->control, ~GRETH_TXEN); | |
130 | } | |
131 | ||
132 | static inline void greth_enable_rx(struct greth_private *greth) | |
133 | { | |
134 | wmb(); | |
135 | GRETH_REGORIN(greth->regs->control, GRETH_RXEN); | |
136 | } | |
137 | ||
138 | static inline void greth_disable_rx(struct greth_private *greth) | |
139 | { | |
140 | GRETH_REGANDIN(greth->regs->control, ~GRETH_RXEN); | |
141 | } | |
142 | ||
143 | static inline void greth_enable_irqs(struct greth_private *greth) | |
144 | { | |
145 | GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI); | |
146 | } | |
147 | ||
148 | static inline void greth_disable_irqs(struct greth_private *greth) | |
149 | { | |
150 | GRETH_REGANDIN(greth->regs->control, ~(GRETH_RXI|GRETH_TXI)); | |
151 | } | |
152 | ||
153 | static inline void greth_write_bd(u32 *bd, u32 val) | |
154 | { | |
155 | __raw_writel(cpu_to_be32(val), bd); | |
156 | } | |
157 | ||
158 | static inline u32 greth_read_bd(u32 *bd) | |
159 | { | |
160 | return be32_to_cpu(__raw_readl(bd)); | |
161 | } | |
162 | ||
163 | static void greth_clean_rings(struct greth_private *greth) | |
164 | { | |
165 | int i; | |
166 | struct greth_bd *rx_bdp = greth->rx_bd_base; | |
167 | struct greth_bd *tx_bdp = greth->tx_bd_base; | |
168 | ||
169 | if (greth->gbit_mac) { | |
170 | ||
171 | /* Free and unmap RX buffers */ | |
172 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
173 | if (greth->rx_skbuff[i] != NULL) { | |
174 | dev_kfree_skb(greth->rx_skbuff[i]); | |
175 | dma_unmap_single(greth->dev, | |
176 | greth_read_bd(&rx_bdp->addr), | |
177 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
178 | DMA_FROM_DEVICE); | |
179 | } | |
180 | } | |
181 | ||
182 | /* TX buffers */ | |
183 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
184 | ||
185 | struct sk_buff *skb = greth->tx_skbuff[greth->tx_last]; | |
186 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
187 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
188 | greth->tx_last = NEXT_TX(greth->tx_last); | |
189 | ||
190 | dma_unmap_single(greth->dev, | |
191 | greth_read_bd(&tx_bdp->addr), | |
192 | skb_headlen(skb), | |
193 | DMA_TO_DEVICE); | |
194 | ||
195 | for (i = 0; i < nr_frags; i++) { | |
196 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
197 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
198 | ||
199 | dma_unmap_page(greth->dev, | |
200 | greth_read_bd(&tx_bdp->addr), | |
9e903e08 | 201 | skb_frag_size(frag), |
d4c41139 KG |
202 | DMA_TO_DEVICE); |
203 | ||
204 | greth->tx_last = NEXT_TX(greth->tx_last); | |
205 | } | |
206 | greth->tx_free += nr_frags+1; | |
207 | dev_kfree_skb(skb); | |
208 | } | |
209 | ||
210 | ||
211 | } else { /* 10/100 Mbps MAC */ | |
212 | ||
213 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
214 | kfree(greth->rx_bufs[i]); | |
215 | dma_unmap_single(greth->dev, | |
216 | greth_read_bd(&rx_bdp->addr), | |
217 | MAX_FRAME_SIZE, | |
218 | DMA_FROM_DEVICE); | |
219 | } | |
220 | for (i = 0; i < GRETH_TXBD_NUM; i++, tx_bdp++) { | |
221 | kfree(greth->tx_bufs[i]); | |
222 | dma_unmap_single(greth->dev, | |
223 | greth_read_bd(&tx_bdp->addr), | |
224 | MAX_FRAME_SIZE, | |
225 | DMA_TO_DEVICE); | |
226 | } | |
227 | } | |
228 | } | |
229 | ||
230 | static int greth_init_rings(struct greth_private *greth) | |
231 | { | |
232 | struct sk_buff *skb; | |
233 | struct greth_bd *rx_bd, *tx_bd; | |
234 | u32 dma_addr; | |
235 | int i; | |
236 | ||
237 | rx_bd = greth->rx_bd_base; | |
238 | tx_bd = greth->tx_bd_base; | |
239 | ||
240 | /* Initialize descriptor rings and buffers */ | |
241 | if (greth->gbit_mac) { | |
242 | ||
243 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
244 | skb = netdev_alloc_skb(greth->netdev, MAX_FRAME_SIZE+NET_IP_ALIGN); | |
245 | if (skb == NULL) { | |
246 | if (netif_msg_ifup(greth)) | |
247 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
248 | goto cleanup; | |
249 | } | |
250 | skb_reserve(skb, NET_IP_ALIGN); | |
251 | dma_addr = dma_map_single(greth->dev, | |
252 | skb->data, | |
253 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
254 | DMA_FROM_DEVICE); | |
255 | ||
256 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
257 | if (netif_msg_ifup(greth)) | |
258 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
259 | goto cleanup; | |
260 | } | |
261 | greth->rx_skbuff[i] = skb; | |
262 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
263 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
264 | } | |
265 | ||
266 | } else { | |
267 | ||
268 | /* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */ | |
269 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
270 | ||
271 | greth->rx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
272 | ||
273 | if (greth->rx_bufs[i] == NULL) { | |
274 | if (netif_msg_ifup(greth)) | |
275 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
276 | goto cleanup; | |
277 | } | |
278 | ||
279 | dma_addr = dma_map_single(greth->dev, | |
280 | greth->rx_bufs[i], | |
281 | MAX_FRAME_SIZE, | |
282 | DMA_FROM_DEVICE); | |
283 | ||
284 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
285 | if (netif_msg_ifup(greth)) | |
286 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
287 | goto cleanup; | |
288 | } | |
289 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
290 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
291 | } | |
292 | for (i = 0; i < GRETH_TXBD_NUM; i++) { | |
293 | ||
294 | greth->tx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
295 | ||
296 | if (greth->tx_bufs[i] == NULL) { | |
297 | if (netif_msg_ifup(greth)) | |
298 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
299 | goto cleanup; | |
300 | } | |
301 | ||
302 | dma_addr = dma_map_single(greth->dev, | |
303 | greth->tx_bufs[i], | |
304 | MAX_FRAME_SIZE, | |
305 | DMA_TO_DEVICE); | |
306 | ||
307 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
308 | if (netif_msg_ifup(greth)) | |
309 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
310 | goto cleanup; | |
311 | } | |
312 | greth_write_bd(&tx_bd[i].addr, dma_addr); | |
313 | greth_write_bd(&tx_bd[i].stat, 0); | |
314 | } | |
315 | } | |
316 | greth_write_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat, | |
317 | greth_read_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat) | GRETH_BD_WR); | |
318 | ||
319 | /* Initialize pointers. */ | |
320 | greth->rx_cur = 0; | |
321 | greth->tx_next = 0; | |
322 | greth->tx_last = 0; | |
323 | greth->tx_free = GRETH_TXBD_NUM; | |
324 | ||
325 | /* Initialize descriptor base address */ | |
326 | GRETH_REGSAVE(greth->regs->tx_desc_p, greth->tx_bd_base_phys); | |
327 | GRETH_REGSAVE(greth->regs->rx_desc_p, greth->rx_bd_base_phys); | |
328 | ||
329 | return 0; | |
330 | ||
331 | cleanup: | |
332 | greth_clean_rings(greth); | |
333 | return -ENOMEM; | |
334 | } | |
335 | ||
336 | static int greth_open(struct net_device *dev) | |
337 | { | |
338 | struct greth_private *greth = netdev_priv(dev); | |
339 | int err; | |
340 | ||
341 | err = greth_init_rings(greth); | |
342 | if (err) { | |
343 | if (netif_msg_ifup(greth)) | |
344 | dev_err(&dev->dev, "Could not allocate memory for DMA rings\n"); | |
345 | return err; | |
346 | } | |
347 | ||
348 | err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev); | |
349 | if (err) { | |
350 | if (netif_msg_ifup(greth)) | |
351 | dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq); | |
352 | greth_clean_rings(greth); | |
353 | return err; | |
354 | } | |
355 | ||
356 | if (netif_msg_ifup(greth)) | |
357 | dev_dbg(&dev->dev, " starting queue\n"); | |
358 | netif_start_queue(dev); | |
359 | ||
bbe9e637 DH |
360 | GRETH_REGSAVE(greth->regs->status, 0xFF); |
361 | ||
d4c41139 KG |
362 | napi_enable(&greth->napi); |
363 | ||
364 | greth_enable_irqs(greth); | |
365 | greth_enable_tx(greth); | |
366 | greth_enable_rx(greth); | |
367 | return 0; | |
368 | ||
369 | } | |
370 | ||
371 | static int greth_close(struct net_device *dev) | |
372 | { | |
373 | struct greth_private *greth = netdev_priv(dev); | |
374 | ||
375 | napi_disable(&greth->napi); | |
376 | ||
bbe9e637 | 377 | greth_disable_irqs(greth); |
d4c41139 | 378 | greth_disable_tx(greth); |
bbe9e637 | 379 | greth_disable_rx(greth); |
d4c41139 KG |
380 | |
381 | netif_stop_queue(dev); | |
382 | ||
383 | free_irq(greth->irq, (void *) dev); | |
384 | ||
385 | greth_clean_rings(greth); | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
41a655ba | 390 | static netdev_tx_t |
391 | greth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
d4c41139 KG |
392 | { |
393 | struct greth_private *greth = netdev_priv(dev); | |
394 | struct greth_bd *bdp; | |
395 | int err = NETDEV_TX_OK; | |
0f73f2c5 DH |
396 | u32 status, dma_addr, ctrl; |
397 | unsigned long flags; | |
d4c41139 | 398 | |
0f73f2c5 DH |
399 | /* Clean TX Ring */ |
400 | greth_clean_tx(greth->netdev); | |
d4c41139 KG |
401 | |
402 | if (unlikely(greth->tx_free <= 0)) { | |
0f73f2c5 DH |
403 | spin_lock_irqsave(&greth->devlock, flags);/*save from poll/irq*/ |
404 | ctrl = GRETH_REGLOAD(greth->regs->control); | |
405 | /* Enable TX IRQ only if not already in poll() routine */ | |
406 | if (ctrl & GRETH_RXI) | |
407 | GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI); | |
d4c41139 | 408 | netif_stop_queue(dev); |
0f73f2c5 | 409 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
410 | return NETDEV_TX_BUSY; |
411 | } | |
412 | ||
413 | if (netif_msg_pktdata(greth)) | |
414 | greth_print_tx_packet(skb); | |
415 | ||
416 | ||
417 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
418 | dev->stats.tx_errors++; | |
419 | goto out; | |
420 | } | |
421 | ||
0f73f2c5 | 422 | bdp = greth->tx_bd_base + greth->tx_next; |
d4c41139 KG |
423 | dma_addr = greth_read_bd(&bdp->addr); |
424 | ||
425 | memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len); | |
426 | ||
427 | dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE); | |
428 | ||
0f73f2c5 | 429 | status = GRETH_BD_EN | GRETH_BD_IE | (skb->len & GRETH_BD_LEN); |
6af29a96 | 430 | greth->tx_bufs_length[greth->tx_next] = 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 | ||
d706f00f DH |
493 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
494 | status |= GRETH_TXBD_CSALL; | |
d4c41139 KG |
495 | status |= skb_headlen(skb) & GRETH_BD_LEN; |
496 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) | |
497 | status |= GRETH_BD_WR; | |
498 | ||
499 | ||
500 | bdp = greth->tx_bd_base + greth->tx_next; | |
501 | greth_write_bd(&bdp->stat, status); | |
502 | dma_addr = dma_map_single(greth->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); | |
503 | ||
504 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
505 | goto map_error; | |
506 | ||
507 | greth_write_bd(&bdp->addr, dma_addr); | |
508 | ||
509 | curr_tx = NEXT_TX(greth->tx_next); | |
510 | ||
511 | /* Frags */ | |
512 | for (i = 0; i < nr_frags; i++) { | |
513 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
514 | greth->tx_skbuff[curr_tx] = NULL; | |
515 | bdp = greth->tx_bd_base + curr_tx; | |
516 | ||
d706f00f DH |
517 | status = GRETH_BD_EN; |
518 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
519 | status |= GRETH_TXBD_CSALL; | |
9e903e08 | 520 | status |= skb_frag_size(frag) & GRETH_BD_LEN; |
d4c41139 KG |
521 | |
522 | /* Wrap around descriptor ring */ | |
523 | if (curr_tx == GRETH_TXBD_NUM_MASK) | |
524 | status |= GRETH_BD_WR; | |
525 | ||
526 | /* More fragments left */ | |
527 | if (i < nr_frags - 1) | |
528 | status |= GRETH_TXBD_MORE; | |
0f73f2c5 DH |
529 | else |
530 | status |= GRETH_BD_IE; /* enable IRQ on last fragment */ | |
d4c41139 KG |
531 | |
532 | greth_write_bd(&bdp->stat, status); | |
533 | ||
9e903e08 | 534 | dma_addr = skb_frag_dma_map(greth->dev, frag, 0, skb_frag_size(frag), |
ab7e11d9 | 535 | DMA_TO_DEVICE); |
d4c41139 KG |
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++; | |
6af29a96 | 644 | dev->stats.tx_bytes += greth->tx_bufs_length[greth->tx_last]; |
d4c41139 KG |
645 | greth->tx_last = NEXT_TX(greth->tx_last); |
646 | greth->tx_free++; | |
647 | } | |
648 | ||
649 | if (greth->tx_free > 0) { | |
650 | netif_wake_queue(dev); | |
651 | } | |
652 | ||
653 | } | |
654 | ||
655 | static inline void greth_update_tx_stats(struct net_device *dev, u32 stat) | |
656 | { | |
657 | /* Check status for errors */ | |
658 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
659 | dev->stats.tx_errors++; | |
660 | if (stat & GRETH_TXBD_ERR_AL) | |
661 | dev->stats.tx_aborted_errors++; | |
662 | if (stat & GRETH_TXBD_ERR_UE) | |
663 | dev->stats.tx_fifo_errors++; | |
664 | if (stat & GRETH_TXBD_ERR_LC) | |
665 | dev->stats.tx_aborted_errors++; | |
666 | } | |
667 | dev->stats.tx_packets++; | |
668 | } | |
669 | ||
670 | static void greth_clean_tx_gbit(struct net_device *dev) | |
671 | { | |
672 | struct greth_private *greth; | |
673 | struct greth_bd *bdp, *bdp_last_frag; | |
674 | struct sk_buff *skb; | |
675 | u32 stat; | |
676 | int nr_frags, i; | |
677 | ||
678 | greth = netdev_priv(dev); | |
679 | ||
680 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
681 | ||
682 | skb = greth->tx_skbuff[greth->tx_last]; | |
683 | ||
684 | nr_frags = skb_shinfo(skb)->nr_frags; | |
685 | ||
686 | /* We only clean fully completed SKBs */ | |
687 | bdp_last_frag = greth->tx_bd_base + SKIP_TX(greth->tx_last, nr_frags); | |
0f73f2c5 DH |
688 | |
689 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX); | |
690 | mb(); | |
691 | stat = greth_read_bd(&bdp_last_frag->stat); | |
d4c41139 KG |
692 | |
693 | if (stat & GRETH_BD_EN) | |
694 | break; | |
695 | ||
696 | greth->tx_skbuff[greth->tx_last] = NULL; | |
697 | ||
698 | greth_update_tx_stats(dev, stat); | |
6af29a96 | 699 | dev->stats.tx_bytes += skb->len; |
d4c41139 KG |
700 | |
701 | bdp = greth->tx_bd_base + greth->tx_last; | |
702 | ||
703 | greth->tx_last = NEXT_TX(greth->tx_last); | |
704 | ||
705 | dma_unmap_single(greth->dev, | |
706 | greth_read_bd(&bdp->addr), | |
707 | skb_headlen(skb), | |
708 | DMA_TO_DEVICE); | |
709 | ||
710 | for (i = 0; i < nr_frags; i++) { | |
711 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
712 | bdp = greth->tx_bd_base + greth->tx_last; | |
713 | ||
714 | dma_unmap_page(greth->dev, | |
715 | greth_read_bd(&bdp->addr), | |
9e903e08 | 716 | skb_frag_size(frag), |
d4c41139 KG |
717 | DMA_TO_DEVICE); |
718 | ||
719 | greth->tx_last = NEXT_TX(greth->tx_last); | |
720 | } | |
721 | greth->tx_free += nr_frags+1; | |
722 | dev_kfree_skb(skb); | |
723 | } | |
d4c41139 | 724 | |
0f73f2c5 DH |
725 | if (netif_queue_stopped(dev) && (greth->tx_free > (MAX_SKB_FRAGS+1))) |
726 | netif_wake_queue(dev); | |
d4c41139 KG |
727 | } |
728 | ||
729 | static int greth_rx(struct net_device *dev, int limit) | |
730 | { | |
731 | struct greth_private *greth; | |
732 | struct greth_bd *bdp; | |
733 | struct sk_buff *skb; | |
734 | int pkt_len; | |
735 | int bad, count; | |
736 | u32 status, dma_addr; | |
0f73f2c5 | 737 | unsigned long flags; |
d4c41139 KG |
738 | |
739 | greth = netdev_priv(dev); | |
740 | ||
741 | for (count = 0; count < limit; ++count) { | |
742 | ||
743 | bdp = greth->rx_bd_base + greth->rx_cur; | |
0f73f2c5 DH |
744 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX); |
745 | mb(); | |
d4c41139 | 746 | status = greth_read_bd(&bdp->stat); |
d4c41139 KG |
747 | |
748 | if (unlikely(status & GRETH_BD_EN)) { | |
749 | break; | |
750 | } | |
751 | ||
0f73f2c5 DH |
752 | dma_addr = greth_read_bd(&bdp->addr); |
753 | bad = 0; | |
754 | ||
d4c41139 KG |
755 | /* Check status for errors. */ |
756 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
757 | if (status & GRETH_RXBD_ERR_FT) { | |
758 | dev->stats.rx_length_errors++; | |
759 | bad = 1; | |
760 | } | |
761 | if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) { | |
762 | dev->stats.rx_frame_errors++; | |
763 | bad = 1; | |
764 | } | |
765 | if (status & GRETH_RXBD_ERR_CRC) { | |
766 | dev->stats.rx_crc_errors++; | |
767 | bad = 1; | |
768 | } | |
769 | } | |
770 | if (unlikely(bad)) { | |
771 | dev->stats.rx_errors++; | |
772 | ||
773 | } else { | |
774 | ||
775 | pkt_len = status & GRETH_BD_LEN; | |
776 | ||
777 | skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN); | |
778 | ||
779 | if (unlikely(skb == NULL)) { | |
780 | ||
781 | if (net_ratelimit()) | |
782 | dev_warn(&dev->dev, "low on memory - " "packet dropped\n"); | |
783 | ||
784 | dev->stats.rx_dropped++; | |
785 | ||
786 | } else { | |
787 | skb_reserve(skb, NET_IP_ALIGN); | |
d4c41139 KG |
788 | |
789 | dma_sync_single_for_cpu(greth->dev, | |
790 | dma_addr, | |
791 | pkt_len, | |
792 | DMA_FROM_DEVICE); | |
793 | ||
794 | if (netif_msg_pktdata(greth)) | |
795 | greth_print_rx_packet(phys_to_virt(dma_addr), pkt_len); | |
796 | ||
797 | memcpy(skb_put(skb, pkt_len), phys_to_virt(dma_addr), pkt_len); | |
798 | ||
799 | skb->protocol = eth_type_trans(skb, dev); | |
6af29a96 | 800 | dev->stats.rx_bytes += pkt_len; |
d4c41139 KG |
801 | dev->stats.rx_packets++; |
802 | netif_receive_skb(skb); | |
803 | } | |
804 | } | |
805 | ||
806 | status = GRETH_BD_EN | GRETH_BD_IE; | |
807 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
808 | status |= GRETH_BD_WR; | |
809 | } | |
810 | ||
811 | wmb(); | |
812 | greth_write_bd(&bdp->stat, status); | |
813 | ||
814 | dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE); | |
815 | ||
0f73f2c5 | 816 | spin_lock_irqsave(&greth->devlock, flags); /* save from XMIT */ |
d4c41139 | 817 | greth_enable_rx(greth); |
0f73f2c5 | 818 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
819 | |
820 | greth->rx_cur = NEXT_RX(greth->rx_cur); | |
821 | } | |
822 | ||
823 | return count; | |
824 | } | |
825 | ||
826 | static inline int hw_checksummed(u32 status) | |
827 | { | |
828 | ||
829 | if (status & GRETH_RXBD_IP_FRAG) | |
830 | return 0; | |
831 | ||
832 | if (status & GRETH_RXBD_IP && status & GRETH_RXBD_IP_CSERR) | |
833 | return 0; | |
834 | ||
835 | if (status & GRETH_RXBD_UDP && status & GRETH_RXBD_UDP_CSERR) | |
836 | return 0; | |
837 | ||
838 | if (status & GRETH_RXBD_TCP && status & GRETH_RXBD_TCP_CSERR) | |
839 | return 0; | |
840 | ||
841 | return 1; | |
842 | } | |
843 | ||
844 | static int greth_rx_gbit(struct net_device *dev, int limit) | |
845 | { | |
846 | struct greth_private *greth; | |
847 | struct greth_bd *bdp; | |
848 | struct sk_buff *skb, *newskb; | |
849 | int pkt_len; | |
850 | int bad, count = 0; | |
851 | u32 status, dma_addr; | |
0f73f2c5 | 852 | unsigned long flags; |
d4c41139 KG |
853 | |
854 | greth = netdev_priv(dev); | |
855 | ||
856 | for (count = 0; count < limit; ++count) { | |
857 | ||
858 | bdp = greth->rx_bd_base + greth->rx_cur; | |
859 | skb = greth->rx_skbuff[greth->rx_cur]; | |
0f73f2c5 DH |
860 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX); |
861 | mb(); | |
d4c41139 KG |
862 | status = greth_read_bd(&bdp->stat); |
863 | bad = 0; | |
864 | ||
865 | if (status & GRETH_BD_EN) | |
866 | break; | |
867 | ||
868 | /* Check status for errors. */ | |
869 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
870 | ||
871 | if (status & GRETH_RXBD_ERR_FT) { | |
872 | dev->stats.rx_length_errors++; | |
873 | bad = 1; | |
874 | } else if (status & | |
875 | (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE | GRETH_RXBD_ERR_LE)) { | |
876 | dev->stats.rx_frame_errors++; | |
877 | bad = 1; | |
878 | } else if (status & GRETH_RXBD_ERR_CRC) { | |
879 | dev->stats.rx_crc_errors++; | |
880 | bad = 1; | |
881 | } | |
882 | } | |
883 | ||
b669e7f0 DH |
884 | /* Allocate new skb to replace current, not needed if the |
885 | * current skb can be reused */ | |
886 | if (!bad && (newskb=netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN))) { | |
d4c41139 KG |
887 | skb_reserve(newskb, NET_IP_ALIGN); |
888 | ||
889 | dma_addr = dma_map_single(greth->dev, | |
890 | newskb->data, | |
891 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
892 | DMA_FROM_DEVICE); | |
893 | ||
894 | if (!dma_mapping_error(greth->dev, dma_addr)) { | |
895 | /* Process the incoming frame. */ | |
896 | pkt_len = status & GRETH_BD_LEN; | |
897 | ||
898 | dma_unmap_single(greth->dev, | |
899 | greth_read_bd(&bdp->addr), | |
900 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
901 | DMA_FROM_DEVICE); | |
902 | ||
903 | if (netif_msg_pktdata(greth)) | |
904 | greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp->addr)), pkt_len); | |
905 | ||
906 | skb_put(skb, pkt_len); | |
907 | ||
131ae329 | 908 | if (dev->features & NETIF_F_RXCSUM && hw_checksummed(status)) |
d4c41139 KG |
909 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
910 | else | |
bc8acf2c | 911 | skb_checksum_none_assert(skb); |
d4c41139 | 912 | |
d4c41139 KG |
913 | skb->protocol = eth_type_trans(skb, dev); |
914 | dev->stats.rx_packets++; | |
6af29a96 | 915 | dev->stats.rx_bytes += pkt_len; |
d4c41139 KG |
916 | netif_receive_skb(skb); |
917 | ||
918 | greth->rx_skbuff[greth->rx_cur] = newskb; | |
919 | greth_write_bd(&bdp->addr, dma_addr); | |
920 | } else { | |
921 | if (net_ratelimit()) | |
922 | dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n"); | |
923 | dev_kfree_skb(newskb); | |
b669e7f0 | 924 | /* reusing current skb, so it is a drop */ |
d4c41139 KG |
925 | dev->stats.rx_dropped++; |
926 | } | |
b669e7f0 DH |
927 | } else if (bad) { |
928 | /* Bad Frame transfer, the skb is reused */ | |
929 | dev->stats.rx_dropped++; | |
d4c41139 | 930 | } else { |
b669e7f0 DH |
931 | /* Failed Allocating a new skb. This is rather stupid |
932 | * but the current "filled" skb is reused, as if | |
933 | * transfer failure. One could argue that RX descriptor | |
934 | * table handling should be divided into cleaning and | |
935 | * filling as the TX part of the driver | |
936 | */ | |
d4c41139 KG |
937 | if (net_ratelimit()) |
938 | dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n"); | |
b669e7f0 | 939 | /* reusing current skb, so it is a drop */ |
d4c41139 KG |
940 | dev->stats.rx_dropped++; |
941 | } | |
942 | ||
943 | status = GRETH_BD_EN | GRETH_BD_IE; | |
944 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
945 | status |= GRETH_BD_WR; | |
946 | } | |
947 | ||
948 | wmb(); | |
949 | greth_write_bd(&bdp->stat, status); | |
0f73f2c5 | 950 | spin_lock_irqsave(&greth->devlock, flags); |
d4c41139 | 951 | greth_enable_rx(greth); |
0f73f2c5 | 952 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
953 | greth->rx_cur = NEXT_RX(greth->rx_cur); |
954 | } | |
955 | ||
956 | return count; | |
957 | ||
958 | } | |
959 | ||
960 | static int greth_poll(struct napi_struct *napi, int budget) | |
961 | { | |
962 | struct greth_private *greth; | |
963 | int work_done = 0; | |
0f73f2c5 DH |
964 | unsigned long flags; |
965 | u32 mask, ctrl; | |
d4c41139 KG |
966 | greth = container_of(napi, struct greth_private, napi); |
967 | ||
0f73f2c5 DH |
968 | restart_txrx_poll: |
969 | if (netif_queue_stopped(greth->netdev)) { | |
970 | if (greth->gbit_mac) | |
971 | greth_clean_tx_gbit(greth->netdev); | |
972 | else | |
973 | greth_clean_tx(greth->netdev); | |
d4c41139 KG |
974 | } |
975 | ||
d4c41139 KG |
976 | if (greth->gbit_mac) { |
977 | work_done += greth_rx_gbit(greth->netdev, budget - work_done); | |
978 | } else { | |
979 | work_done += greth_rx(greth->netdev, budget - work_done); | |
980 | } | |
981 | ||
982 | if (work_done < budget) { | |
983 | ||
0f73f2c5 | 984 | spin_lock_irqsave(&greth->devlock, flags); |
d4c41139 | 985 | |
0f73f2c5 DH |
986 | ctrl = GRETH_REGLOAD(greth->regs->control); |
987 | if (netif_queue_stopped(greth->netdev)) { | |
988 | GRETH_REGSAVE(greth->regs->control, | |
989 | ctrl | GRETH_TXI | GRETH_RXI); | |
990 | mask = GRETH_INT_RX | GRETH_INT_RE | | |
991 | GRETH_INT_TX | GRETH_INT_TE; | |
992 | } else { | |
993 | GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_RXI); | |
994 | mask = GRETH_INT_RX | GRETH_INT_RE; | |
995 | } | |
996 | ||
997 | if (GRETH_REGLOAD(greth->regs->status) & mask) { | |
998 | GRETH_REGSAVE(greth->regs->control, ctrl); | |
999 | spin_unlock_irqrestore(&greth->devlock, flags); | |
1000 | goto restart_txrx_poll; | |
1001 | } else { | |
1002 | __napi_complete(napi); | |
1003 | spin_unlock_irqrestore(&greth->devlock, flags); | |
d4c41139 KG |
1004 | } |
1005 | } | |
1006 | ||
d4c41139 KG |
1007 | return work_done; |
1008 | } | |
1009 | ||
1010 | static int greth_set_mac_add(struct net_device *dev, void *p) | |
1011 | { | |
1012 | struct sockaddr *addr = p; | |
1013 | struct greth_private *greth; | |
1014 | struct greth_regs *regs; | |
1015 | ||
6e03718c | 1016 | greth = netdev_priv(dev); |
d4c41139 KG |
1017 | regs = (struct greth_regs *) greth->regs; |
1018 | ||
1019 | if (!is_valid_ether_addr(addr->sa_data)) | |
504f9b5a | 1020 | return -EADDRNOTAVAIL; |
d4c41139 KG |
1021 | |
1022 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
9b9cfe7c KG |
1023 | GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); |
1024 | GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | | |
1025 | dev->dev_addr[4] << 8 | dev->dev_addr[5]); | |
d4c41139 | 1026 | |
d4c41139 KG |
1027 | return 0; |
1028 | } | |
1029 | ||
1030 | static u32 greth_hash_get_index(__u8 *addr) | |
1031 | { | |
1032 | return (ether_crc(6, addr)) & 0x3F; | |
1033 | } | |
1034 | ||
1035 | static void greth_set_hash_filter(struct net_device *dev) | |
1036 | { | |
22bedad3 | 1037 | struct netdev_hw_addr *ha; |
6e03718c | 1038 | struct greth_private *greth = netdev_priv(dev); |
d4c41139 KG |
1039 | struct greth_regs *regs = (struct greth_regs *) greth->regs; |
1040 | u32 mc_filter[2]; | |
6e03718c | 1041 | unsigned int bitnr; |
d4c41139 KG |
1042 | |
1043 | mc_filter[0] = mc_filter[1] = 0; | |
1044 | ||
22bedad3 JP |
1045 | netdev_for_each_mc_addr(ha, dev) { |
1046 | bitnr = greth_hash_get_index(ha->addr); | |
d4c41139 KG |
1047 | mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); |
1048 | } | |
1049 | ||
1050 | GRETH_REGSAVE(regs->hash_msb, mc_filter[1]); | |
1051 | GRETH_REGSAVE(regs->hash_lsb, mc_filter[0]); | |
1052 | } | |
1053 | ||
1054 | static void greth_set_multicast_list(struct net_device *dev) | |
1055 | { | |
1056 | int cfg; | |
1057 | struct greth_private *greth = netdev_priv(dev); | |
1058 | struct greth_regs *regs = (struct greth_regs *) greth->regs; | |
1059 | ||
1060 | cfg = GRETH_REGLOAD(regs->control); | |
1061 | if (dev->flags & IFF_PROMISC) | |
1062 | cfg |= GRETH_CTRL_PR; | |
1063 | else | |
1064 | cfg &= ~GRETH_CTRL_PR; | |
1065 | ||
1066 | if (greth->multicast) { | |
1067 | if (dev->flags & IFF_ALLMULTI) { | |
1068 | GRETH_REGSAVE(regs->hash_msb, -1); | |
1069 | GRETH_REGSAVE(regs->hash_lsb, -1); | |
1070 | cfg |= GRETH_CTRL_MCEN; | |
1071 | GRETH_REGSAVE(regs->control, cfg); | |
1072 | return; | |
1073 | } | |
1074 | ||
6e03718c | 1075 | if (netdev_mc_empty(dev)) { |
d4c41139 KG |
1076 | cfg &= ~GRETH_CTRL_MCEN; |
1077 | GRETH_REGSAVE(regs->control, cfg); | |
1078 | return; | |
1079 | } | |
1080 | ||
1081 | /* Setup multicast filter */ | |
1082 | greth_set_hash_filter(dev); | |
1083 | cfg |= GRETH_CTRL_MCEN; | |
1084 | } | |
1085 | GRETH_REGSAVE(regs->control, cfg); | |
1086 | } | |
1087 | ||
1088 | static u32 greth_get_msglevel(struct net_device *dev) | |
1089 | { | |
1090 | struct greth_private *greth = netdev_priv(dev); | |
1091 | return greth->msg_enable; | |
1092 | } | |
1093 | ||
1094 | static void greth_set_msglevel(struct net_device *dev, u32 value) | |
1095 | { | |
1096 | struct greth_private *greth = netdev_priv(dev); | |
1097 | greth->msg_enable = value; | |
1098 | } | |
1099 | static int greth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1100 | { | |
1101 | struct greth_private *greth = netdev_priv(dev); | |
1102 | struct phy_device *phy = greth->phy; | |
1103 | ||
1104 | if (!phy) | |
1105 | return -ENODEV; | |
1106 | ||
1107 | return phy_ethtool_gset(phy, cmd); | |
1108 | } | |
1109 | ||
1110 | static int greth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1111 | { | |
1112 | struct greth_private *greth = netdev_priv(dev); | |
1113 | struct phy_device *phy = greth->phy; | |
1114 | ||
1115 | if (!phy) | |
1116 | return -ENODEV; | |
1117 | ||
1118 | return phy_ethtool_sset(phy, cmd); | |
1119 | } | |
1120 | ||
1121 | static int greth_get_regs_len(struct net_device *dev) | |
1122 | { | |
1123 | return sizeof(struct greth_regs); | |
1124 | } | |
1125 | ||
1126 | static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1127 | { | |
1128 | struct greth_private *greth = netdev_priv(dev); | |
1129 | ||
1130 | strncpy(info->driver, dev_driver_string(greth->dev), 32); | |
1131 | strncpy(info->version, "revision: 1.0", 32); | |
1132 | strncpy(info->bus_info, greth->dev->bus->name, 32); | |
1133 | strncpy(info->fw_version, "N/A", 32); | |
1134 | info->eedump_len = 0; | |
1135 | info->regdump_len = sizeof(struct greth_regs); | |
1136 | } | |
1137 | ||
1138 | static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) | |
1139 | { | |
1140 | int i; | |
1141 | struct greth_private *greth = netdev_priv(dev); | |
1142 | u32 __iomem *greth_regs = (u32 __iomem *) greth->regs; | |
1143 | u32 *buff = p; | |
1144 | ||
1145 | for (i = 0; i < sizeof(struct greth_regs) / sizeof(u32); i++) | |
1146 | buff[i] = greth_read_bd(&greth_regs[i]); | |
1147 | } | |
1148 | ||
d4c41139 KG |
1149 | static const struct ethtool_ops greth_ethtool_ops = { |
1150 | .get_msglevel = greth_get_msglevel, | |
1151 | .set_msglevel = greth_set_msglevel, | |
1152 | .get_settings = greth_get_settings, | |
1153 | .set_settings = greth_set_settings, | |
1154 | .get_drvinfo = greth_get_drvinfo, | |
1155 | .get_regs_len = greth_get_regs_len, | |
1156 | .get_regs = greth_get_regs, | |
d4c41139 KG |
1157 | .get_link = ethtool_op_get_link, |
1158 | }; | |
1159 | ||
1160 | static struct net_device_ops greth_netdev_ops = { | |
0f73f2c5 DH |
1161 | .ndo_open = greth_open, |
1162 | .ndo_stop = greth_close, | |
1163 | .ndo_start_xmit = greth_start_xmit, | |
1164 | .ndo_set_mac_address = greth_set_mac_add, | |
1165 | .ndo_validate_addr = eth_validate_addr, | |
d4c41139 KG |
1166 | }; |
1167 | ||
1168 | static inline int wait_for_mdio(struct greth_private *greth) | |
1169 | { | |
1170 | unsigned long timeout = jiffies + 4*HZ/100; | |
1171 | while (GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_BUSY) { | |
1172 | if (time_after(jiffies, timeout)) | |
1173 | return 0; | |
1174 | } | |
1175 | return 1; | |
1176 | } | |
1177 | ||
1178 | static int greth_mdio_read(struct mii_bus *bus, int phy, int reg) | |
1179 | { | |
1180 | struct greth_private *greth = bus->priv; | |
1181 | int data; | |
1182 | ||
1183 | if (!wait_for_mdio(greth)) | |
1184 | return -EBUSY; | |
1185 | ||
1186 | GRETH_REGSAVE(greth->regs->mdio, ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 2); | |
1187 | ||
1188 | if (!wait_for_mdio(greth)) | |
1189 | return -EBUSY; | |
1190 | ||
1191 | if (!(GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_NVALID)) { | |
1192 | data = (GRETH_REGLOAD(greth->regs->mdio) >> 16) & 0xFFFF; | |
1193 | return data; | |
1194 | ||
1195 | } else { | |
1196 | return -1; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | static int greth_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) | |
1201 | { | |
1202 | struct greth_private *greth = bus->priv; | |
1203 | ||
1204 | if (!wait_for_mdio(greth)) | |
1205 | return -EBUSY; | |
1206 | ||
1207 | GRETH_REGSAVE(greth->regs->mdio, | |
1208 | ((val & 0xFFFF) << 16) | ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 1); | |
1209 | ||
1210 | if (!wait_for_mdio(greth)) | |
1211 | return -EBUSY; | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | static int greth_mdio_reset(struct mii_bus *bus) | |
1217 | { | |
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | static void greth_link_change(struct net_device *dev) | |
1222 | { | |
1223 | struct greth_private *greth = netdev_priv(dev); | |
1224 | struct phy_device *phydev = greth->phy; | |
1225 | unsigned long flags; | |
d4c41139 | 1226 | int status_change = 0; |
2436af8c | 1227 | u32 ctrl; |
d4c41139 KG |
1228 | |
1229 | spin_lock_irqsave(&greth->devlock, flags); | |
1230 | ||
1231 | if (phydev->link) { | |
1232 | ||
1233 | if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) { | |
2436af8c DH |
1234 | ctrl = GRETH_REGLOAD(greth->regs->control) & |
1235 | ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB); | |
d4c41139 KG |
1236 | |
1237 | if (phydev->duplex) | |
2436af8c | 1238 | ctrl |= GRETH_CTRL_FD; |
d4c41139 | 1239 | |
2436af8c DH |
1240 | if (phydev->speed == SPEED_100) |
1241 | ctrl |= GRETH_CTRL_SP; | |
d4c41139 | 1242 | else if (phydev->speed == SPEED_1000) |
2436af8c | 1243 | ctrl |= GRETH_CTRL_GB; |
d4c41139 | 1244 | |
2436af8c | 1245 | GRETH_REGSAVE(greth->regs->control, ctrl); |
d4c41139 KG |
1246 | greth->speed = phydev->speed; |
1247 | greth->duplex = phydev->duplex; | |
1248 | status_change = 1; | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | if (phydev->link != greth->link) { | |
1253 | if (!phydev->link) { | |
1254 | greth->speed = 0; | |
1255 | greth->duplex = -1; | |
1256 | } | |
1257 | greth->link = phydev->link; | |
1258 | ||
1259 | status_change = 1; | |
1260 | } | |
1261 | ||
1262 | spin_unlock_irqrestore(&greth->devlock, flags); | |
1263 | ||
1264 | if (status_change) { | |
1265 | if (phydev->link) | |
1266 | pr_debug("%s: link up (%d/%s)\n", | |
1267 | dev->name, phydev->speed, | |
1268 | DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); | |
1269 | else | |
1270 | pr_debug("%s: link down\n", dev->name); | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | static int greth_mdio_probe(struct net_device *dev) | |
1275 | { | |
1276 | struct greth_private *greth = netdev_priv(dev); | |
1277 | struct phy_device *phy = NULL; | |
6e03718c | 1278 | int ret; |
d4c41139 KG |
1279 | |
1280 | /* Find the first PHY */ | |
6e03718c | 1281 | phy = phy_find_first(greth->mdio); |
1282 | ||
d4c41139 KG |
1283 | if (!phy) { |
1284 | if (netif_msg_probe(greth)) | |
1285 | dev_err(&dev->dev, "no PHY found\n"); | |
1286 | return -ENXIO; | |
1287 | } | |
1288 | ||
6e03718c | 1289 | ret = phy_connect_direct(dev, phy, &greth_link_change, |
1290 | 0, greth->gbit_mac ? | |
1291 | PHY_INTERFACE_MODE_GMII : | |
1292 | PHY_INTERFACE_MODE_MII); | |
1293 | if (ret) { | |
1294 | if (netif_msg_ifup(greth)) | |
1295 | dev_err(&dev->dev, "could not attach to PHY\n"); | |
1296 | return ret; | |
1297 | } | |
d4c41139 KG |
1298 | |
1299 | if (greth->gbit_mac) | |
1300 | phy->supported &= PHY_GBIT_FEATURES; | |
1301 | else | |
1302 | phy->supported &= PHY_BASIC_FEATURES; | |
1303 | ||
1304 | phy->advertising = phy->supported; | |
1305 | ||
d4c41139 KG |
1306 | greth->link = 0; |
1307 | greth->speed = 0; | |
1308 | greth->duplex = -1; | |
1309 | greth->phy = phy; | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static inline int phy_aneg_done(struct phy_device *phydev) | |
1315 | { | |
1316 | int retval; | |
1317 | ||
1318 | retval = phy_read(phydev, MII_BMSR); | |
1319 | ||
1320 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1321 | } | |
1322 | ||
1323 | static int greth_mdio_init(struct greth_private *greth) | |
1324 | { | |
1325 | int ret, phy; | |
1326 | unsigned long timeout; | |
1327 | ||
1328 | greth->mdio = mdiobus_alloc(); | |
1329 | if (!greth->mdio) { | |
1330 | return -ENOMEM; | |
1331 | } | |
1332 | ||
1333 | greth->mdio->name = "greth-mdio"; | |
1334 | snprintf(greth->mdio->id, MII_BUS_ID_SIZE, "%s-%d", greth->mdio->name, greth->irq); | |
1335 | greth->mdio->read = greth_mdio_read; | |
1336 | greth->mdio->write = greth_mdio_write; | |
1337 | greth->mdio->reset = greth_mdio_reset; | |
1338 | greth->mdio->priv = greth; | |
1339 | ||
1340 | greth->mdio->irq = greth->mdio_irqs; | |
1341 | ||
1342 | for (phy = 0; phy < PHY_MAX_ADDR; phy++) | |
1343 | greth->mdio->irq[phy] = PHY_POLL; | |
1344 | ||
1345 | ret = mdiobus_register(greth->mdio); | |
1346 | if (ret) { | |
1347 | goto error; | |
1348 | } | |
1349 | ||
1350 | ret = greth_mdio_probe(greth->netdev); | |
1351 | if (ret) { | |
1352 | if (netif_msg_probe(greth)) | |
1353 | dev_err(&greth->netdev->dev, "failed to probe MDIO bus\n"); | |
1354 | goto unreg_mdio; | |
1355 | } | |
1356 | ||
1357 | phy_start(greth->phy); | |
1358 | ||
1359 | /* If Ethernet debug link is used make autoneg happen right away */ | |
1360 | if (greth->edcl && greth_edcl == 1) { | |
1361 | phy_start_aneg(greth->phy); | |
1362 | timeout = jiffies + 6*HZ; | |
1363 | while (!phy_aneg_done(greth->phy) && time_before(jiffies, timeout)) { | |
1364 | } | |
1365 | genphy_read_status(greth->phy); | |
1366 | greth_link_change(greth->netdev); | |
1367 | } | |
1368 | ||
1369 | return 0; | |
1370 | ||
1371 | unreg_mdio: | |
1372 | mdiobus_unregister(greth->mdio); | |
1373 | error: | |
1374 | mdiobus_free(greth->mdio); | |
1375 | return ret; | |
1376 | } | |
1377 | ||
1378 | /* Initialize the GRETH MAC */ | |
74888760 | 1379 | static int __devinit greth_of_probe(struct platform_device *ofdev) |
d4c41139 KG |
1380 | { |
1381 | struct net_device *dev; | |
1382 | struct greth_private *greth; | |
1383 | struct greth_regs *regs; | |
1384 | ||
1385 | int i; | |
1386 | int err; | |
1387 | int tmp; | |
1388 | unsigned long timeout; | |
1389 | ||
1390 | dev = alloc_etherdev(sizeof(struct greth_private)); | |
1391 | ||
1392 | if (dev == NULL) | |
1393 | return -ENOMEM; | |
1394 | ||
1395 | greth = netdev_priv(dev); | |
1396 | greth->netdev = dev; | |
1397 | greth->dev = &ofdev->dev; | |
1398 | ||
1399 | if (greth_debug > 0) | |
1400 | greth->msg_enable = greth_debug; | |
1401 | else | |
1402 | greth->msg_enable = GRETH_DEF_MSG_ENABLE; | |
1403 | ||
1404 | spin_lock_init(&greth->devlock); | |
1405 | ||
1406 | greth->regs = of_ioremap(&ofdev->resource[0], 0, | |
1407 | resource_size(&ofdev->resource[0]), | |
1408 | "grlib-greth regs"); | |
1409 | ||
1410 | if (greth->regs == NULL) { | |
1411 | if (netif_msg_probe(greth)) | |
1412 | dev_err(greth->dev, "ioremap failure.\n"); | |
1413 | err = -EIO; | |
1414 | goto error1; | |
1415 | } | |
1416 | ||
1417 | regs = (struct greth_regs *) greth->regs; | |
19e4875f | 1418 | greth->irq = ofdev->archdata.irqs[0]; |
d4c41139 KG |
1419 | |
1420 | dev_set_drvdata(greth->dev, dev); | |
1421 | SET_NETDEV_DEV(dev, greth->dev); | |
1422 | ||
1423 | if (netif_msg_probe(greth)) | |
72e60278 | 1424 | dev_dbg(greth->dev, "resetting controller.\n"); |
d4c41139 KG |
1425 | |
1426 | /* Reset the controller. */ | |
1427 | GRETH_REGSAVE(regs->control, GRETH_RESET); | |
1428 | ||
1429 | /* Wait for MAC to reset itself */ | |
1430 | timeout = jiffies + HZ/100; | |
1431 | while (GRETH_REGLOAD(regs->control) & GRETH_RESET) { | |
1432 | if (time_after(jiffies, timeout)) { | |
1433 | err = -EIO; | |
1434 | if (netif_msg_probe(greth)) | |
1435 | dev_err(greth->dev, "timeout when waiting for reset.\n"); | |
1436 | goto error2; | |
1437 | } | |
1438 | } | |
1439 | ||
1440 | /* Get default PHY address */ | |
1441 | greth->phyaddr = (GRETH_REGLOAD(regs->mdio) >> 11) & 0x1F; | |
1442 | ||
1443 | /* Check if we have GBIT capable MAC */ | |
1444 | tmp = GRETH_REGLOAD(regs->control); | |
1445 | greth->gbit_mac = (tmp >> 27) & 1; | |
1446 | ||
1447 | /* Check for multicast capability */ | |
1448 | greth->multicast = (tmp >> 25) & 1; | |
1449 | ||
1450 | greth->edcl = (tmp >> 31) & 1; | |
1451 | ||
1452 | /* If we have EDCL we disable the EDCL speed-duplex FSM so | |
1453 | * it doesn't interfere with the software */ | |
1454 | if (greth->edcl != 0) | |
1455 | GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX); | |
1456 | ||
1457 | /* Check if MAC can handle MDIO interrupts */ | |
1458 | greth->mdio_int_en = (tmp >> 26) & 1; | |
1459 | ||
1460 | err = greth_mdio_init(greth); | |
1461 | if (err) { | |
1462 | if (netif_msg_probe(greth)) | |
1463 | dev_err(greth->dev, "failed to register MDIO bus\n"); | |
1464 | goto error2; | |
1465 | } | |
1466 | ||
1467 | /* Allocate TX descriptor ring in coherent memory */ | |
1468 | greth->tx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev, | |
1469 | 1024, | |
1470 | &greth->tx_bd_base_phys, | |
1471 | GFP_KERNEL); | |
1472 | ||
1473 | if (!greth->tx_bd_base) { | |
1474 | if (netif_msg_probe(greth)) | |
1475 | dev_err(&dev->dev, "could not allocate descriptor memory.\n"); | |
1476 | err = -ENOMEM; | |
1477 | goto error3; | |
1478 | } | |
1479 | ||
1480 | memset(greth->tx_bd_base, 0, 1024); | |
1481 | ||
1482 | /* Allocate RX descriptor ring in coherent memory */ | |
1483 | greth->rx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev, | |
1484 | 1024, | |
1485 | &greth->rx_bd_base_phys, | |
1486 | GFP_KERNEL); | |
1487 | ||
1488 | if (!greth->rx_bd_base) { | |
1489 | if (netif_msg_probe(greth)) | |
1490 | dev_err(greth->dev, "could not allocate descriptor memory.\n"); | |
1491 | err = -ENOMEM; | |
1492 | goto error4; | |
1493 | } | |
1494 | ||
1495 | memset(greth->rx_bd_base, 0, 1024); | |
1496 | ||
1497 | /* Get MAC address from: module param, OF property or ID prom */ | |
1498 | for (i = 0; i < 6; i++) { | |
1499 | if (macaddr[i] != 0) | |
1500 | break; | |
1501 | } | |
1502 | if (i == 6) { | |
1503 | const unsigned char *addr; | |
1504 | int len; | |
61c7a080 GL |
1505 | addr = of_get_property(ofdev->dev.of_node, "local-mac-address", |
1506 | &len); | |
d4c41139 KG |
1507 | if (addr != NULL && len == 6) { |
1508 | for (i = 0; i < 6; i++) | |
1509 | macaddr[i] = (unsigned int) addr[i]; | |
1510 | } else { | |
1511 | #ifdef CONFIG_SPARC | |
1512 | for (i = 0; i < 6; i++) | |
1513 | macaddr[i] = (unsigned int) idprom->id_ethaddr[i]; | |
1514 | #endif | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | for (i = 0; i < 6; i++) | |
1519 | dev->dev_addr[i] = macaddr[i]; | |
1520 | ||
1521 | macaddr[5]++; | |
1522 | ||
1523 | if (!is_valid_ether_addr(&dev->dev_addr[0])) { | |
1524 | if (netif_msg_probe(greth)) | |
1525 | dev_err(greth->dev, "no valid ethernet address, aborting.\n"); | |
1526 | err = -EINVAL; | |
1527 | goto error5; | |
1528 | } | |
1529 | ||
1530 | GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); | |
1531 | GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | | |
1532 | dev->dev_addr[4] << 8 | dev->dev_addr[5]); | |
1533 | ||
1534 | /* Clear all pending interrupts except PHY irq */ | |
1535 | GRETH_REGSAVE(regs->status, 0xFF); | |
1536 | ||
1537 | if (greth->gbit_mac) { | |
131ae329 MM |
1538 | dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | |
1539 | NETIF_F_RXCSUM; | |
1540 | dev->features = dev->hw_features | NETIF_F_HIGHDMA; | |
d4c41139 | 1541 | greth_netdev_ops.ndo_start_xmit = greth_start_xmit_gbit; |
d4c41139 KG |
1542 | } |
1543 | ||
1544 | if (greth->multicast) { | |
afc4b13d | 1545 | greth_netdev_ops.ndo_set_rx_mode = greth_set_multicast_list; |
d4c41139 KG |
1546 | dev->flags |= IFF_MULTICAST; |
1547 | } else { | |
1548 | dev->flags &= ~IFF_MULTICAST; | |
1549 | } | |
1550 | ||
1551 | dev->netdev_ops = &greth_netdev_ops; | |
1552 | dev->ethtool_ops = &greth_ethtool_ops; | |
1553 | ||
cb5d991a TK |
1554 | err = register_netdev(dev); |
1555 | if (err) { | |
d4c41139 KG |
1556 | if (netif_msg_probe(greth)) |
1557 | dev_err(greth->dev, "netdevice registration failed.\n"); | |
d4c41139 KG |
1558 | goto error5; |
1559 | } | |
1560 | ||
1561 | /* setup NAPI */ | |
d4c41139 KG |
1562 | netif_napi_add(dev, &greth->napi, greth_poll, 64); |
1563 | ||
1564 | return 0; | |
1565 | ||
1566 | error5: | |
1567 | dma_free_coherent(greth->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1568 | error4: | |
1569 | dma_free_coherent(greth->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1570 | error3: | |
1571 | mdiobus_unregister(greth->mdio); | |
1572 | error2: | |
1573 | of_iounmap(&ofdev->resource[0], greth->regs, resource_size(&ofdev->resource[0])); | |
1574 | error1: | |
1575 | free_netdev(dev); | |
1576 | return err; | |
1577 | } | |
1578 | ||
2dc11581 | 1579 | static int __devexit greth_of_remove(struct platform_device *of_dev) |
d4c41139 KG |
1580 | { |
1581 | struct net_device *ndev = dev_get_drvdata(&of_dev->dev); | |
1582 | struct greth_private *greth = netdev_priv(ndev); | |
1583 | ||
1584 | /* Free descriptor areas */ | |
1585 | dma_free_coherent(&of_dev->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1586 | ||
1587 | dma_free_coherent(&of_dev->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1588 | ||
1589 | dev_set_drvdata(&of_dev->dev, NULL); | |
1590 | ||
1591 | if (greth->phy) | |
1592 | phy_stop(greth->phy); | |
1593 | mdiobus_unregister(greth->mdio); | |
1594 | ||
1595 | unregister_netdev(ndev); | |
1596 | free_netdev(ndev); | |
1597 | ||
1598 | of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0])); | |
1599 | ||
1600 | return 0; | |
1601 | } | |
1602 | ||
1603 | static struct of_device_id greth_of_match[] = { | |
1604 | { | |
1605 | .name = "GAISLER_ETHMAC", | |
1606 | }, | |
ad4650a8 DH |
1607 | { |
1608 | .name = "01_01d", | |
1609 | }, | |
d4c41139 KG |
1610 | {}, |
1611 | }; | |
1612 | ||
1613 | MODULE_DEVICE_TABLE(of, greth_of_match); | |
1614 | ||
74888760 | 1615 | static struct platform_driver greth_of_driver = { |
bc284f94 DM |
1616 | .driver = { |
1617 | .name = "grlib-greth", | |
1618 | .owner = THIS_MODULE, | |
1619 | .of_match_table = greth_of_match, | |
1620 | }, | |
d4c41139 KG |
1621 | .probe = greth_of_probe, |
1622 | .remove = __devexit_p(greth_of_remove), | |
d4c41139 KG |
1623 | }; |
1624 | ||
db62f684 | 1625 | module_platform_driver(greth_of_driver); |
d4c41139 KG |
1626 | |
1627 | MODULE_AUTHOR("Aeroflex Gaisler AB."); | |
1628 | MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver"); | |
1629 | MODULE_LICENSE("GPL"); |