]>
Commit | Line | Data |
---|---|---|
d4c41139 KG |
1 | /* |
2 | * Aeroflex Gaisler GRETH 10/100/1G Ethernet MAC. | |
3 | * | |
4 | * 2005-2009 (c) Aeroflex Gaisler AB | |
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 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/uaccess.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/etherdevice.h> | |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/skbuff.h> | |
32 | #include <linux/io.h> | |
33 | #include <linux/crc32.h> | |
34 | #include <linux/mii.h> | |
35 | #include <linux/of_device.h> | |
36 | #include <linux/of_platform.h> | |
37 | #include <asm/cacheflush.h> | |
38 | #include <asm/byteorder.h> | |
39 | ||
40 | #ifdef CONFIG_SPARC | |
41 | #include <asm/idprom.h> | |
42 | #endif | |
43 | ||
44 | #include "greth.h" | |
45 | ||
46 | #define GRETH_DEF_MSG_ENABLE \ | |
47 | (NETIF_MSG_DRV | \ | |
48 | NETIF_MSG_PROBE | \ | |
49 | NETIF_MSG_LINK | \ | |
50 | NETIF_MSG_IFDOWN | \ | |
51 | NETIF_MSG_IFUP | \ | |
52 | NETIF_MSG_RX_ERR | \ | |
53 | NETIF_MSG_TX_ERR) | |
54 | ||
55 | static int greth_debug = -1; /* -1 == use GRETH_DEF_MSG_ENABLE as value */ | |
56 | module_param(greth_debug, int, 0); | |
57 | MODULE_PARM_DESC(greth_debug, "GRETH bitmapped debugging message enable value"); | |
58 | ||
59 | /* Accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */ | |
60 | static int macaddr[6]; | |
61 | module_param_array(macaddr, int, NULL, 0); | |
62 | MODULE_PARM_DESC(macaddr, "GRETH Ethernet MAC address"); | |
63 | ||
64 | static int greth_edcl = 1; | |
65 | module_param(greth_edcl, int, 0); | |
66 | MODULE_PARM_DESC(greth_edcl, "GRETH EDCL usage indicator. Set to 1 if EDCL is used."); | |
67 | ||
68 | static int greth_open(struct net_device *dev); | |
69 | static int greth_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
70 | static int greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev); | |
71 | static int greth_rx(struct net_device *dev, int limit); | |
72 | static int greth_rx_gbit(struct net_device *dev, int limit); | |
73 | static void greth_clean_tx(struct net_device *dev); | |
74 | static void greth_clean_tx_gbit(struct net_device *dev); | |
75 | static irqreturn_t greth_interrupt(int irq, void *dev_id); | |
76 | static int greth_close(struct net_device *dev); | |
77 | static int greth_set_mac_add(struct net_device *dev, void *p); | |
78 | static void greth_set_multicast_list(struct net_device *dev); | |
79 | ||
80 | #define GRETH_REGLOAD(a) (be32_to_cpu(__raw_readl(&(a)))) | |
81 | #define GRETH_REGSAVE(a, v) (__raw_writel(cpu_to_be32(v), &(a))) | |
82 | #define GRETH_REGORIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v)))) | |
83 | #define GRETH_REGANDIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v)))) | |
84 | ||
85 | #define NEXT_TX(N) (((N) + 1) & GRETH_TXBD_NUM_MASK) | |
86 | #define SKIP_TX(N, C) (((N) + C) & GRETH_TXBD_NUM_MASK) | |
87 | #define NEXT_RX(N) (((N) + 1) & GRETH_RXBD_NUM_MASK) | |
88 | ||
89 | static void greth_print_rx_packet(void *addr, int len) | |
90 | { | |
91 | print_hex_dump(KERN_DEBUG, "RX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
92 | addr, len, true); | |
93 | } | |
94 | ||
95 | static void greth_print_tx_packet(struct sk_buff *skb) | |
96 | { | |
97 | int i; | |
98 | int length; | |
99 | ||
100 | if (skb_shinfo(skb)->nr_frags == 0) | |
101 | length = skb->len; | |
102 | else | |
103 | length = skb_headlen(skb); | |
104 | ||
105 | print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
106 | skb->data, length, true); | |
107 | ||
108 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
109 | ||
110 | print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
111 | phys_to_virt(page_to_phys(skb_shinfo(skb)->frags[i].page)) + | |
112 | skb_shinfo(skb)->frags[i].page_offset, | |
113 | length, true); | |
114 | } | |
115 | } | |
116 | ||
117 | static inline void greth_enable_tx(struct greth_private *greth) | |
118 | { | |
119 | wmb(); | |
120 | GRETH_REGORIN(greth->regs->control, GRETH_TXEN); | |
121 | } | |
122 | ||
123 | static inline void greth_disable_tx(struct greth_private *greth) | |
124 | { | |
125 | GRETH_REGANDIN(greth->regs->control, ~GRETH_TXEN); | |
126 | } | |
127 | ||
128 | static inline void greth_enable_rx(struct greth_private *greth) | |
129 | { | |
130 | wmb(); | |
131 | GRETH_REGORIN(greth->regs->control, GRETH_RXEN); | |
132 | } | |
133 | ||
134 | static inline void greth_disable_rx(struct greth_private *greth) | |
135 | { | |
136 | GRETH_REGANDIN(greth->regs->control, ~GRETH_RXEN); | |
137 | } | |
138 | ||
139 | static inline void greth_enable_irqs(struct greth_private *greth) | |
140 | { | |
141 | GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI); | |
142 | } | |
143 | ||
144 | static inline void greth_disable_irqs(struct greth_private *greth) | |
145 | { | |
146 | GRETH_REGANDIN(greth->regs->control, ~(GRETH_RXI|GRETH_TXI)); | |
147 | } | |
148 | ||
149 | static inline void greth_write_bd(u32 *bd, u32 val) | |
150 | { | |
151 | __raw_writel(cpu_to_be32(val), bd); | |
152 | } | |
153 | ||
154 | static inline u32 greth_read_bd(u32 *bd) | |
155 | { | |
156 | return be32_to_cpu(__raw_readl(bd)); | |
157 | } | |
158 | ||
159 | static void greth_clean_rings(struct greth_private *greth) | |
160 | { | |
161 | int i; | |
162 | struct greth_bd *rx_bdp = greth->rx_bd_base; | |
163 | struct greth_bd *tx_bdp = greth->tx_bd_base; | |
164 | ||
165 | if (greth->gbit_mac) { | |
166 | ||
167 | /* Free and unmap RX buffers */ | |
168 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
169 | if (greth->rx_skbuff[i] != NULL) { | |
170 | dev_kfree_skb(greth->rx_skbuff[i]); | |
171 | dma_unmap_single(greth->dev, | |
172 | greth_read_bd(&rx_bdp->addr), | |
173 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
174 | DMA_FROM_DEVICE); | |
175 | } | |
176 | } | |
177 | ||
178 | /* TX buffers */ | |
179 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
180 | ||
181 | struct sk_buff *skb = greth->tx_skbuff[greth->tx_last]; | |
182 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
183 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
184 | greth->tx_last = NEXT_TX(greth->tx_last); | |
185 | ||
186 | dma_unmap_single(greth->dev, | |
187 | greth_read_bd(&tx_bdp->addr), | |
188 | skb_headlen(skb), | |
189 | DMA_TO_DEVICE); | |
190 | ||
191 | for (i = 0; i < nr_frags; i++) { | |
192 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
193 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
194 | ||
195 | dma_unmap_page(greth->dev, | |
196 | greth_read_bd(&tx_bdp->addr), | |
197 | frag->size, | |
198 | DMA_TO_DEVICE); | |
199 | ||
200 | greth->tx_last = NEXT_TX(greth->tx_last); | |
201 | } | |
202 | greth->tx_free += nr_frags+1; | |
203 | dev_kfree_skb(skb); | |
204 | } | |
205 | ||
206 | ||
207 | } else { /* 10/100 Mbps MAC */ | |
208 | ||
209 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
210 | kfree(greth->rx_bufs[i]); | |
211 | dma_unmap_single(greth->dev, | |
212 | greth_read_bd(&rx_bdp->addr), | |
213 | MAX_FRAME_SIZE, | |
214 | DMA_FROM_DEVICE); | |
215 | } | |
216 | for (i = 0; i < GRETH_TXBD_NUM; i++, tx_bdp++) { | |
217 | kfree(greth->tx_bufs[i]); | |
218 | dma_unmap_single(greth->dev, | |
219 | greth_read_bd(&tx_bdp->addr), | |
220 | MAX_FRAME_SIZE, | |
221 | DMA_TO_DEVICE); | |
222 | } | |
223 | } | |
224 | } | |
225 | ||
226 | static int greth_init_rings(struct greth_private *greth) | |
227 | { | |
228 | struct sk_buff *skb; | |
229 | struct greth_bd *rx_bd, *tx_bd; | |
230 | u32 dma_addr; | |
231 | int i; | |
232 | ||
233 | rx_bd = greth->rx_bd_base; | |
234 | tx_bd = greth->tx_bd_base; | |
235 | ||
236 | /* Initialize descriptor rings and buffers */ | |
237 | if (greth->gbit_mac) { | |
238 | ||
239 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
240 | skb = netdev_alloc_skb(greth->netdev, MAX_FRAME_SIZE+NET_IP_ALIGN); | |
241 | if (skb == NULL) { | |
242 | if (netif_msg_ifup(greth)) | |
243 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
244 | goto cleanup; | |
245 | } | |
246 | skb_reserve(skb, NET_IP_ALIGN); | |
247 | dma_addr = dma_map_single(greth->dev, | |
248 | skb->data, | |
249 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
250 | DMA_FROM_DEVICE); | |
251 | ||
252 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
253 | if (netif_msg_ifup(greth)) | |
254 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
255 | goto cleanup; | |
256 | } | |
257 | greth->rx_skbuff[i] = skb; | |
258 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
259 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
260 | } | |
261 | ||
262 | } else { | |
263 | ||
264 | /* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */ | |
265 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
266 | ||
267 | greth->rx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
268 | ||
269 | if (greth->rx_bufs[i] == NULL) { | |
270 | if (netif_msg_ifup(greth)) | |
271 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
272 | goto cleanup; | |
273 | } | |
274 | ||
275 | dma_addr = dma_map_single(greth->dev, | |
276 | greth->rx_bufs[i], | |
277 | MAX_FRAME_SIZE, | |
278 | DMA_FROM_DEVICE); | |
279 | ||
280 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
281 | if (netif_msg_ifup(greth)) | |
282 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
283 | goto cleanup; | |
284 | } | |
285 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
286 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
287 | } | |
288 | for (i = 0; i < GRETH_TXBD_NUM; i++) { | |
289 | ||
290 | greth->tx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
291 | ||
292 | if (greth->tx_bufs[i] == NULL) { | |
293 | if (netif_msg_ifup(greth)) | |
294 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
295 | goto cleanup; | |
296 | } | |
297 | ||
298 | dma_addr = dma_map_single(greth->dev, | |
299 | greth->tx_bufs[i], | |
300 | MAX_FRAME_SIZE, | |
301 | DMA_TO_DEVICE); | |
302 | ||
303 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
304 | if (netif_msg_ifup(greth)) | |
305 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
306 | goto cleanup; | |
307 | } | |
308 | greth_write_bd(&tx_bd[i].addr, dma_addr); | |
309 | greth_write_bd(&tx_bd[i].stat, 0); | |
310 | } | |
311 | } | |
312 | greth_write_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat, | |
313 | greth_read_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat) | GRETH_BD_WR); | |
314 | ||
315 | /* Initialize pointers. */ | |
316 | greth->rx_cur = 0; | |
317 | greth->tx_next = 0; | |
318 | greth->tx_last = 0; | |
319 | greth->tx_free = GRETH_TXBD_NUM; | |
320 | ||
321 | /* Initialize descriptor base address */ | |
322 | GRETH_REGSAVE(greth->regs->tx_desc_p, greth->tx_bd_base_phys); | |
323 | GRETH_REGSAVE(greth->regs->rx_desc_p, greth->rx_bd_base_phys); | |
324 | ||
325 | return 0; | |
326 | ||
327 | cleanup: | |
328 | greth_clean_rings(greth); | |
329 | return -ENOMEM; | |
330 | } | |
331 | ||
332 | static int greth_open(struct net_device *dev) | |
333 | { | |
334 | struct greth_private *greth = netdev_priv(dev); | |
335 | int err; | |
336 | ||
337 | err = greth_init_rings(greth); | |
338 | if (err) { | |
339 | if (netif_msg_ifup(greth)) | |
340 | dev_err(&dev->dev, "Could not allocate memory for DMA rings\n"); | |
341 | return err; | |
342 | } | |
343 | ||
344 | err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev); | |
345 | if (err) { | |
346 | if (netif_msg_ifup(greth)) | |
347 | dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq); | |
348 | greth_clean_rings(greth); | |
349 | return err; | |
350 | } | |
351 | ||
352 | if (netif_msg_ifup(greth)) | |
353 | dev_dbg(&dev->dev, " starting queue\n"); | |
354 | netif_start_queue(dev); | |
355 | ||
356 | napi_enable(&greth->napi); | |
357 | ||
358 | greth_enable_irqs(greth); | |
359 | greth_enable_tx(greth); | |
360 | greth_enable_rx(greth); | |
361 | return 0; | |
362 | ||
363 | } | |
364 | ||
365 | static int greth_close(struct net_device *dev) | |
366 | { | |
367 | struct greth_private *greth = netdev_priv(dev); | |
368 | ||
369 | napi_disable(&greth->napi); | |
370 | ||
371 | greth_disable_tx(greth); | |
372 | ||
373 | netif_stop_queue(dev); | |
374 | ||
375 | free_irq(greth->irq, (void *) dev); | |
376 | ||
377 | greth_clean_rings(greth); | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static int greth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
383 | { | |
384 | struct greth_private *greth = netdev_priv(dev); | |
385 | struct greth_bd *bdp; | |
386 | int err = NETDEV_TX_OK; | |
387 | u32 status, dma_addr; | |
388 | ||
389 | bdp = greth->tx_bd_base + greth->tx_next; | |
390 | ||
391 | if (unlikely(greth->tx_free <= 0)) { | |
392 | netif_stop_queue(dev); | |
393 | return NETDEV_TX_BUSY; | |
394 | } | |
395 | ||
396 | if (netif_msg_pktdata(greth)) | |
397 | greth_print_tx_packet(skb); | |
398 | ||
399 | ||
400 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
401 | dev->stats.tx_errors++; | |
402 | goto out; | |
403 | } | |
404 | ||
405 | dma_addr = greth_read_bd(&bdp->addr); | |
406 | ||
407 | memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len); | |
408 | ||
409 | dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE); | |
410 | ||
411 | status = GRETH_BD_EN | (skb->len & GRETH_BD_LEN); | |
412 | ||
413 | /* Wrap around descriptor ring */ | |
414 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) { | |
415 | status |= GRETH_BD_WR; | |
416 | } | |
417 | ||
418 | greth->tx_next = NEXT_TX(greth->tx_next); | |
419 | greth->tx_free--; | |
420 | ||
421 | /* No more descriptors */ | |
422 | if (unlikely(greth->tx_free == 0)) { | |
423 | ||
424 | /* Free transmitted descriptors */ | |
425 | greth_clean_tx(dev); | |
426 | ||
427 | /* If nothing was cleaned, stop queue & wait for irq */ | |
428 | if (unlikely(greth->tx_free == 0)) { | |
429 | status |= GRETH_BD_IE; | |
430 | netif_stop_queue(dev); | |
431 | } | |
432 | } | |
433 | ||
434 | /* Write descriptor control word and enable transmission */ | |
435 | greth_write_bd(&bdp->stat, status); | |
436 | greth_enable_tx(greth); | |
437 | ||
438 | out: | |
439 | dev_kfree_skb(skb); | |
440 | return err; | |
441 | } | |
442 | ||
443 | ||
444 | static int greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) | |
445 | { | |
446 | struct greth_private *greth = netdev_priv(dev); | |
447 | struct greth_bd *bdp; | |
448 | u32 status = 0, dma_addr; | |
449 | int curr_tx, nr_frags, i, err = NETDEV_TX_OK; | |
450 | ||
451 | nr_frags = skb_shinfo(skb)->nr_frags; | |
452 | ||
453 | if (greth->tx_free < nr_frags + 1) { | |
454 | netif_stop_queue(dev); | |
455 | err = NETDEV_TX_BUSY; | |
456 | goto out; | |
457 | } | |
458 | ||
459 | if (netif_msg_pktdata(greth)) | |
460 | greth_print_tx_packet(skb); | |
461 | ||
462 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
463 | dev->stats.tx_errors++; | |
464 | goto out; | |
465 | } | |
466 | ||
467 | /* Save skb pointer. */ | |
468 | greth->tx_skbuff[greth->tx_next] = skb; | |
469 | ||
470 | /* Linear buf */ | |
471 | if (nr_frags != 0) | |
472 | status = GRETH_TXBD_MORE; | |
473 | ||
474 | status |= GRETH_TXBD_CSALL; | |
475 | status |= skb_headlen(skb) & GRETH_BD_LEN; | |
476 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) | |
477 | status |= GRETH_BD_WR; | |
478 | ||
479 | ||
480 | bdp = greth->tx_bd_base + greth->tx_next; | |
481 | greth_write_bd(&bdp->stat, status); | |
482 | dma_addr = dma_map_single(greth->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); | |
483 | ||
484 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
485 | goto map_error; | |
486 | ||
487 | greth_write_bd(&bdp->addr, dma_addr); | |
488 | ||
489 | curr_tx = NEXT_TX(greth->tx_next); | |
490 | ||
491 | /* Frags */ | |
492 | for (i = 0; i < nr_frags; i++) { | |
493 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
494 | greth->tx_skbuff[curr_tx] = NULL; | |
495 | bdp = greth->tx_bd_base + curr_tx; | |
496 | ||
497 | status = GRETH_TXBD_CSALL; | |
498 | status |= frag->size & GRETH_BD_LEN; | |
499 | ||
500 | /* Wrap around descriptor ring */ | |
501 | if (curr_tx == GRETH_TXBD_NUM_MASK) | |
502 | status |= GRETH_BD_WR; | |
503 | ||
504 | /* More fragments left */ | |
505 | if (i < nr_frags - 1) | |
506 | status |= GRETH_TXBD_MORE; | |
507 | ||
508 | /* ... last fragment, check if out of descriptors */ | |
509 | else if (greth->tx_free - nr_frags - 1 < (MAX_SKB_FRAGS + 1)) { | |
510 | ||
511 | /* Enable interrupts and stop queue */ | |
512 | status |= GRETH_BD_IE; | |
513 | netif_stop_queue(dev); | |
514 | } | |
515 | ||
516 | greth_write_bd(&bdp->stat, status); | |
517 | ||
518 | dma_addr = dma_map_page(greth->dev, | |
519 | frag->page, | |
520 | frag->page_offset, | |
521 | frag->size, | |
522 | DMA_TO_DEVICE); | |
523 | ||
524 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
525 | goto frag_map_error; | |
526 | ||
527 | greth_write_bd(&bdp->addr, dma_addr); | |
528 | ||
529 | curr_tx = NEXT_TX(curr_tx); | |
530 | } | |
531 | ||
532 | wmb(); | |
533 | ||
534 | /* Enable the descriptors that we configured ... */ | |
535 | for (i = 0; i < nr_frags + 1; i++) { | |
536 | bdp = greth->tx_bd_base + greth->tx_next; | |
537 | greth_write_bd(&bdp->stat, greth_read_bd(&bdp->stat) | GRETH_BD_EN); | |
538 | greth->tx_next = NEXT_TX(greth->tx_next); | |
539 | greth->tx_free--; | |
540 | } | |
541 | ||
542 | greth_enable_tx(greth); | |
543 | ||
544 | return NETDEV_TX_OK; | |
545 | ||
546 | frag_map_error: | |
547 | /* Unmap SKB mappings that succeeded */ | |
548 | for (i = 0; greth->tx_next + i != curr_tx; i++) { | |
549 | bdp = greth->tx_bd_base + greth->tx_next + i; | |
550 | dma_unmap_single(greth->dev, | |
551 | greth_read_bd(&bdp->addr), | |
552 | greth_read_bd(&bdp->stat) & GRETH_BD_LEN, | |
553 | DMA_TO_DEVICE); | |
554 | } | |
555 | map_error: | |
556 | if (net_ratelimit()) | |
557 | dev_warn(greth->dev, "Could not create TX DMA mapping\n"); | |
558 | dev_kfree_skb(skb); | |
559 | return NETDEV_TX_OK; | |
560 | ||
561 | out: | |
562 | return err; | |
563 | } | |
564 | ||
565 | ||
566 | static irqreturn_t greth_interrupt(int irq, void *dev_id) | |
567 | { | |
568 | struct net_device *dev = dev_id; | |
569 | struct greth_private *greth; | |
570 | u32 status; | |
571 | irqreturn_t retval = IRQ_NONE; | |
572 | ||
573 | greth = netdev_priv(dev); | |
574 | ||
575 | spin_lock(&greth->devlock); | |
576 | ||
577 | /* Get the interrupt events that caused us to be here. */ | |
578 | status = GRETH_REGLOAD(greth->regs->status); | |
579 | ||
580 | /* Handle rx and tx interrupts through poll */ | |
581 | if (status & (GRETH_INT_RX | GRETH_INT_TX)) { | |
582 | ||
583 | /* Clear interrupt status */ | |
584 | GRETH_REGORIN(greth->regs->status, | |
585 | status & (GRETH_INT_RX | GRETH_INT_TX)); | |
586 | ||
587 | retval = IRQ_HANDLED; | |
588 | ||
589 | /* Disable interrupts and schedule poll() */ | |
590 | greth_disable_irqs(greth); | |
591 | napi_schedule(&greth->napi); | |
592 | } | |
593 | ||
594 | mmiowb(); | |
595 | spin_unlock(&greth->devlock); | |
596 | ||
597 | return retval; | |
598 | } | |
599 | ||
600 | static void greth_clean_tx(struct net_device *dev) | |
601 | { | |
602 | struct greth_private *greth; | |
603 | struct greth_bd *bdp; | |
604 | u32 stat; | |
605 | ||
606 | greth = netdev_priv(dev); | |
607 | ||
608 | while (1) { | |
609 | bdp = greth->tx_bd_base + greth->tx_last; | |
610 | stat = greth_read_bd(&bdp->stat); | |
611 | ||
612 | if (unlikely(stat & GRETH_BD_EN)) | |
613 | break; | |
614 | ||
615 | if (greth->tx_free == GRETH_TXBD_NUM) | |
616 | break; | |
617 | ||
618 | /* Check status for errors */ | |
619 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
620 | dev->stats.tx_errors++; | |
621 | if (stat & GRETH_TXBD_ERR_AL) | |
622 | dev->stats.tx_aborted_errors++; | |
623 | if (stat & GRETH_TXBD_ERR_UE) | |
624 | dev->stats.tx_fifo_errors++; | |
625 | } | |
626 | dev->stats.tx_packets++; | |
627 | greth->tx_last = NEXT_TX(greth->tx_last); | |
628 | greth->tx_free++; | |
629 | } | |
630 | ||
631 | if (greth->tx_free > 0) { | |
632 | netif_wake_queue(dev); | |
633 | } | |
634 | ||
635 | } | |
636 | ||
637 | static inline void greth_update_tx_stats(struct net_device *dev, u32 stat) | |
638 | { | |
639 | /* Check status for errors */ | |
640 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
641 | dev->stats.tx_errors++; | |
642 | if (stat & GRETH_TXBD_ERR_AL) | |
643 | dev->stats.tx_aborted_errors++; | |
644 | if (stat & GRETH_TXBD_ERR_UE) | |
645 | dev->stats.tx_fifo_errors++; | |
646 | if (stat & GRETH_TXBD_ERR_LC) | |
647 | dev->stats.tx_aborted_errors++; | |
648 | } | |
649 | dev->stats.tx_packets++; | |
650 | } | |
651 | ||
652 | static void greth_clean_tx_gbit(struct net_device *dev) | |
653 | { | |
654 | struct greth_private *greth; | |
655 | struct greth_bd *bdp, *bdp_last_frag; | |
656 | struct sk_buff *skb; | |
657 | u32 stat; | |
658 | int nr_frags, i; | |
659 | ||
660 | greth = netdev_priv(dev); | |
661 | ||
662 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
663 | ||
664 | skb = greth->tx_skbuff[greth->tx_last]; | |
665 | ||
666 | nr_frags = skb_shinfo(skb)->nr_frags; | |
667 | ||
668 | /* We only clean fully completed SKBs */ | |
669 | bdp_last_frag = greth->tx_bd_base + SKIP_TX(greth->tx_last, nr_frags); | |
670 | stat = bdp_last_frag->stat; | |
671 | ||
672 | if (stat & GRETH_BD_EN) | |
673 | break; | |
674 | ||
675 | greth->tx_skbuff[greth->tx_last] = NULL; | |
676 | ||
677 | greth_update_tx_stats(dev, stat); | |
678 | ||
679 | bdp = greth->tx_bd_base + greth->tx_last; | |
680 | ||
681 | greth->tx_last = NEXT_TX(greth->tx_last); | |
682 | ||
683 | dma_unmap_single(greth->dev, | |
684 | greth_read_bd(&bdp->addr), | |
685 | skb_headlen(skb), | |
686 | DMA_TO_DEVICE); | |
687 | ||
688 | for (i = 0; i < nr_frags; i++) { | |
689 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
690 | bdp = greth->tx_bd_base + greth->tx_last; | |
691 | ||
692 | dma_unmap_page(greth->dev, | |
693 | greth_read_bd(&bdp->addr), | |
694 | frag->size, | |
695 | DMA_TO_DEVICE); | |
696 | ||
697 | greth->tx_last = NEXT_TX(greth->tx_last); | |
698 | } | |
699 | greth->tx_free += nr_frags+1; | |
700 | dev_kfree_skb(skb); | |
701 | } | |
702 | if (greth->tx_free > (MAX_SKB_FRAGS + 1)) { | |
703 | netif_wake_queue(dev); | |
704 | } | |
705 | } | |
706 | ||
707 | static int greth_pending_packets(struct greth_private *greth) | |
708 | { | |
709 | struct greth_bd *bdp; | |
710 | u32 status; | |
711 | bdp = greth->rx_bd_base + greth->rx_cur; | |
712 | status = greth_read_bd(&bdp->stat); | |
713 | if (status & GRETH_BD_EN) | |
714 | return 0; | |
715 | else | |
716 | return 1; | |
717 | } | |
718 | ||
719 | static int greth_rx(struct net_device *dev, int limit) | |
720 | { | |
721 | struct greth_private *greth; | |
722 | struct greth_bd *bdp; | |
723 | struct sk_buff *skb; | |
724 | int pkt_len; | |
725 | int bad, count; | |
726 | u32 status, dma_addr; | |
727 | ||
728 | greth = netdev_priv(dev); | |
729 | ||
730 | for (count = 0; count < limit; ++count) { | |
731 | ||
732 | bdp = greth->rx_bd_base + greth->rx_cur; | |
733 | status = greth_read_bd(&bdp->stat); | |
734 | dma_addr = greth_read_bd(&bdp->addr); | |
735 | bad = 0; | |
736 | ||
737 | if (unlikely(status & GRETH_BD_EN)) { | |
738 | break; | |
739 | } | |
740 | ||
741 | /* Check status for errors. */ | |
742 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
743 | if (status & GRETH_RXBD_ERR_FT) { | |
744 | dev->stats.rx_length_errors++; | |
745 | bad = 1; | |
746 | } | |
747 | if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) { | |
748 | dev->stats.rx_frame_errors++; | |
749 | bad = 1; | |
750 | } | |
751 | if (status & GRETH_RXBD_ERR_CRC) { | |
752 | dev->stats.rx_crc_errors++; | |
753 | bad = 1; | |
754 | } | |
755 | } | |
756 | if (unlikely(bad)) { | |
757 | dev->stats.rx_errors++; | |
758 | ||
759 | } else { | |
760 | ||
761 | pkt_len = status & GRETH_BD_LEN; | |
762 | ||
763 | skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN); | |
764 | ||
765 | if (unlikely(skb == NULL)) { | |
766 | ||
767 | if (net_ratelimit()) | |
768 | dev_warn(&dev->dev, "low on memory - " "packet dropped\n"); | |
769 | ||
770 | dev->stats.rx_dropped++; | |
771 | ||
772 | } else { | |
773 | skb_reserve(skb, NET_IP_ALIGN); | |
774 | skb->dev = dev; | |
775 | ||
776 | dma_sync_single_for_cpu(greth->dev, | |
777 | dma_addr, | |
778 | pkt_len, | |
779 | DMA_FROM_DEVICE); | |
780 | ||
781 | if (netif_msg_pktdata(greth)) | |
782 | greth_print_rx_packet(phys_to_virt(dma_addr), pkt_len); | |
783 | ||
784 | memcpy(skb_put(skb, pkt_len), phys_to_virt(dma_addr), pkt_len); | |
785 | ||
786 | skb->protocol = eth_type_trans(skb, dev); | |
787 | dev->stats.rx_packets++; | |
788 | netif_receive_skb(skb); | |
789 | } | |
790 | } | |
791 | ||
792 | status = GRETH_BD_EN | GRETH_BD_IE; | |
793 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
794 | status |= GRETH_BD_WR; | |
795 | } | |
796 | ||
797 | wmb(); | |
798 | greth_write_bd(&bdp->stat, status); | |
799 | ||
800 | dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE); | |
801 | ||
802 | greth_enable_rx(greth); | |
803 | ||
804 | greth->rx_cur = NEXT_RX(greth->rx_cur); | |
805 | } | |
806 | ||
807 | return count; | |
808 | } | |
809 | ||
810 | static inline int hw_checksummed(u32 status) | |
811 | { | |
812 | ||
813 | if (status & GRETH_RXBD_IP_FRAG) | |
814 | return 0; | |
815 | ||
816 | if (status & GRETH_RXBD_IP && status & GRETH_RXBD_IP_CSERR) | |
817 | return 0; | |
818 | ||
819 | if (status & GRETH_RXBD_UDP && status & GRETH_RXBD_UDP_CSERR) | |
820 | return 0; | |
821 | ||
822 | if (status & GRETH_RXBD_TCP && status & GRETH_RXBD_TCP_CSERR) | |
823 | return 0; | |
824 | ||
825 | return 1; | |
826 | } | |
827 | ||
828 | static int greth_rx_gbit(struct net_device *dev, int limit) | |
829 | { | |
830 | struct greth_private *greth; | |
831 | struct greth_bd *bdp; | |
832 | struct sk_buff *skb, *newskb; | |
833 | int pkt_len; | |
834 | int bad, count = 0; | |
835 | u32 status, dma_addr; | |
836 | ||
837 | greth = netdev_priv(dev); | |
838 | ||
839 | for (count = 0; count < limit; ++count) { | |
840 | ||
841 | bdp = greth->rx_bd_base + greth->rx_cur; | |
842 | skb = greth->rx_skbuff[greth->rx_cur]; | |
843 | status = greth_read_bd(&bdp->stat); | |
844 | bad = 0; | |
845 | ||
846 | if (status & GRETH_BD_EN) | |
847 | break; | |
848 | ||
849 | /* Check status for errors. */ | |
850 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
851 | ||
852 | if (status & GRETH_RXBD_ERR_FT) { | |
853 | dev->stats.rx_length_errors++; | |
854 | bad = 1; | |
855 | } else if (status & | |
856 | (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE | GRETH_RXBD_ERR_LE)) { | |
857 | dev->stats.rx_frame_errors++; | |
858 | bad = 1; | |
859 | } else if (status & GRETH_RXBD_ERR_CRC) { | |
860 | dev->stats.rx_crc_errors++; | |
861 | bad = 1; | |
862 | } | |
863 | } | |
864 | ||
865 | /* Allocate new skb to replace current */ | |
866 | newskb = netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN); | |
867 | ||
868 | if (!bad && newskb) { | |
869 | skb_reserve(newskb, NET_IP_ALIGN); | |
870 | ||
871 | dma_addr = dma_map_single(greth->dev, | |
872 | newskb->data, | |
873 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
874 | DMA_FROM_DEVICE); | |
875 | ||
876 | if (!dma_mapping_error(greth->dev, dma_addr)) { | |
877 | /* Process the incoming frame. */ | |
878 | pkt_len = status & GRETH_BD_LEN; | |
879 | ||
880 | dma_unmap_single(greth->dev, | |
881 | greth_read_bd(&bdp->addr), | |
882 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
883 | DMA_FROM_DEVICE); | |
884 | ||
885 | if (netif_msg_pktdata(greth)) | |
886 | greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp->addr)), pkt_len); | |
887 | ||
888 | skb_put(skb, pkt_len); | |
889 | ||
890 | if (greth->flags & GRETH_FLAG_RX_CSUM && hw_checksummed(status)) | |
891 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
892 | else | |
893 | skb->ip_summed = CHECKSUM_NONE; | |
894 | ||
895 | skb->dev = dev; | |
896 | skb->protocol = eth_type_trans(skb, dev); | |
897 | dev->stats.rx_packets++; | |
898 | netif_receive_skb(skb); | |
899 | ||
900 | greth->rx_skbuff[greth->rx_cur] = newskb; | |
901 | greth_write_bd(&bdp->addr, dma_addr); | |
902 | } else { | |
903 | if (net_ratelimit()) | |
904 | dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n"); | |
905 | dev_kfree_skb(newskb); | |
906 | dev->stats.rx_dropped++; | |
907 | } | |
908 | } else { | |
909 | if (net_ratelimit()) | |
910 | dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n"); | |
911 | dev->stats.rx_dropped++; | |
912 | } | |
913 | ||
914 | status = GRETH_BD_EN | GRETH_BD_IE; | |
915 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
916 | status |= GRETH_BD_WR; | |
917 | } | |
918 | ||
919 | wmb(); | |
920 | greth_write_bd(&bdp->stat, status); | |
921 | greth_enable_rx(greth); | |
922 | greth->rx_cur = NEXT_RX(greth->rx_cur); | |
923 | } | |
924 | ||
925 | return count; | |
926 | ||
927 | } | |
928 | ||
929 | static int greth_poll(struct napi_struct *napi, int budget) | |
930 | { | |
931 | struct greth_private *greth; | |
932 | int work_done = 0; | |
933 | greth = container_of(napi, struct greth_private, napi); | |
934 | ||
935 | if (greth->gbit_mac) { | |
936 | greth_clean_tx_gbit(greth->netdev); | |
937 | } else { | |
938 | greth_clean_tx(greth->netdev); | |
939 | } | |
940 | ||
941 | restart_poll: | |
942 | if (greth->gbit_mac) { | |
943 | work_done += greth_rx_gbit(greth->netdev, budget - work_done); | |
944 | } else { | |
945 | work_done += greth_rx(greth->netdev, budget - work_done); | |
946 | } | |
947 | ||
948 | if (work_done < budget) { | |
949 | ||
950 | napi_complete(napi); | |
951 | ||
952 | if (greth_pending_packets(greth)) { | |
953 | napi_reschedule(napi); | |
954 | goto restart_poll; | |
955 | } | |
956 | } | |
957 | ||
958 | greth_enable_irqs(greth); | |
959 | return work_done; | |
960 | } | |
961 | ||
962 | static int greth_set_mac_add(struct net_device *dev, void *p) | |
963 | { | |
964 | struct sockaddr *addr = p; | |
965 | struct greth_private *greth; | |
966 | struct greth_regs *regs; | |
967 | ||
6e03718c | 968 | greth = netdev_priv(dev); |
d4c41139 KG |
969 | regs = (struct greth_regs *) greth->regs; |
970 | ||
971 | if (!is_valid_ether_addr(addr->sa_data)) | |
972 | return -EINVAL; | |
973 | ||
974 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
975 | ||
976 | GRETH_REGSAVE(regs->esa_msb, addr->sa_data[0] << 8 | addr->sa_data[1]); | |
977 | GRETH_REGSAVE(regs->esa_lsb, | |
978 | addr->sa_data[2] << 24 | addr-> | |
979 | sa_data[3] << 16 | addr->sa_data[4] << 8 | addr->sa_data[5]); | |
980 | return 0; | |
981 | } | |
982 | ||
983 | static u32 greth_hash_get_index(__u8 *addr) | |
984 | { | |
985 | return (ether_crc(6, addr)) & 0x3F; | |
986 | } | |
987 | ||
988 | static void greth_set_hash_filter(struct net_device *dev) | |
989 | { | |
990 | struct dev_mc_list *curr; | |
6e03718c | 991 | struct greth_private *greth = netdev_priv(dev); |
d4c41139 KG |
992 | struct greth_regs *regs = (struct greth_regs *) greth->regs; |
993 | u32 mc_filter[2]; | |
6e03718c | 994 | unsigned int bitnr; |
d4c41139 KG |
995 | |
996 | mc_filter[0] = mc_filter[1] = 0; | |
997 | ||
6e03718c | 998 | netdev_for_each_mc_addr(curr, dev) { |
d4c41139 KG |
999 | bitnr = greth_hash_get_index(curr->dmi_addr); |
1000 | mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); | |
1001 | } | |
1002 | ||
1003 | GRETH_REGSAVE(regs->hash_msb, mc_filter[1]); | |
1004 | GRETH_REGSAVE(regs->hash_lsb, mc_filter[0]); | |
1005 | } | |
1006 | ||
1007 | static void greth_set_multicast_list(struct net_device *dev) | |
1008 | { | |
1009 | int cfg; | |
1010 | struct greth_private *greth = netdev_priv(dev); | |
1011 | struct greth_regs *regs = (struct greth_regs *) greth->regs; | |
1012 | ||
1013 | cfg = GRETH_REGLOAD(regs->control); | |
1014 | if (dev->flags & IFF_PROMISC) | |
1015 | cfg |= GRETH_CTRL_PR; | |
1016 | else | |
1017 | cfg &= ~GRETH_CTRL_PR; | |
1018 | ||
1019 | if (greth->multicast) { | |
1020 | if (dev->flags & IFF_ALLMULTI) { | |
1021 | GRETH_REGSAVE(regs->hash_msb, -1); | |
1022 | GRETH_REGSAVE(regs->hash_lsb, -1); | |
1023 | cfg |= GRETH_CTRL_MCEN; | |
1024 | GRETH_REGSAVE(regs->control, cfg); | |
1025 | return; | |
1026 | } | |
1027 | ||
6e03718c | 1028 | if (netdev_mc_empty(dev)) { |
d4c41139 KG |
1029 | cfg &= ~GRETH_CTRL_MCEN; |
1030 | GRETH_REGSAVE(regs->control, cfg); | |
1031 | return; | |
1032 | } | |
1033 | ||
1034 | /* Setup multicast filter */ | |
1035 | greth_set_hash_filter(dev); | |
1036 | cfg |= GRETH_CTRL_MCEN; | |
1037 | } | |
1038 | GRETH_REGSAVE(regs->control, cfg); | |
1039 | } | |
1040 | ||
1041 | static u32 greth_get_msglevel(struct net_device *dev) | |
1042 | { | |
1043 | struct greth_private *greth = netdev_priv(dev); | |
1044 | return greth->msg_enable; | |
1045 | } | |
1046 | ||
1047 | static void greth_set_msglevel(struct net_device *dev, u32 value) | |
1048 | { | |
1049 | struct greth_private *greth = netdev_priv(dev); | |
1050 | greth->msg_enable = value; | |
1051 | } | |
1052 | static int greth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1053 | { | |
1054 | struct greth_private *greth = netdev_priv(dev); | |
1055 | struct phy_device *phy = greth->phy; | |
1056 | ||
1057 | if (!phy) | |
1058 | return -ENODEV; | |
1059 | ||
1060 | return phy_ethtool_gset(phy, cmd); | |
1061 | } | |
1062 | ||
1063 | static int greth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1064 | { | |
1065 | struct greth_private *greth = netdev_priv(dev); | |
1066 | struct phy_device *phy = greth->phy; | |
1067 | ||
1068 | if (!phy) | |
1069 | return -ENODEV; | |
1070 | ||
1071 | return phy_ethtool_sset(phy, cmd); | |
1072 | } | |
1073 | ||
1074 | static int greth_get_regs_len(struct net_device *dev) | |
1075 | { | |
1076 | return sizeof(struct greth_regs); | |
1077 | } | |
1078 | ||
1079 | static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1080 | { | |
1081 | struct greth_private *greth = netdev_priv(dev); | |
1082 | ||
1083 | strncpy(info->driver, dev_driver_string(greth->dev), 32); | |
1084 | strncpy(info->version, "revision: 1.0", 32); | |
1085 | strncpy(info->bus_info, greth->dev->bus->name, 32); | |
1086 | strncpy(info->fw_version, "N/A", 32); | |
1087 | info->eedump_len = 0; | |
1088 | info->regdump_len = sizeof(struct greth_regs); | |
1089 | } | |
1090 | ||
1091 | static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) | |
1092 | { | |
1093 | int i; | |
1094 | struct greth_private *greth = netdev_priv(dev); | |
1095 | u32 __iomem *greth_regs = (u32 __iomem *) greth->regs; | |
1096 | u32 *buff = p; | |
1097 | ||
1098 | for (i = 0; i < sizeof(struct greth_regs) / sizeof(u32); i++) | |
1099 | buff[i] = greth_read_bd(&greth_regs[i]); | |
1100 | } | |
1101 | ||
1102 | static u32 greth_get_rx_csum(struct net_device *dev) | |
1103 | { | |
1104 | struct greth_private *greth = netdev_priv(dev); | |
1105 | return (greth->flags & GRETH_FLAG_RX_CSUM) != 0; | |
1106 | } | |
1107 | ||
1108 | static int greth_set_rx_csum(struct net_device *dev, u32 data) | |
1109 | { | |
1110 | struct greth_private *greth = netdev_priv(dev); | |
1111 | ||
1112 | spin_lock_bh(&greth->devlock); | |
1113 | ||
1114 | if (data) | |
1115 | greth->flags |= GRETH_FLAG_RX_CSUM; | |
1116 | else | |
1117 | greth->flags &= ~GRETH_FLAG_RX_CSUM; | |
1118 | ||
1119 | spin_unlock_bh(&greth->devlock); | |
1120 | ||
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | static u32 greth_get_tx_csum(struct net_device *dev) | |
1125 | { | |
1126 | return (dev->features & NETIF_F_IP_CSUM) != 0; | |
1127 | } | |
1128 | ||
1129 | static int greth_set_tx_csum(struct net_device *dev, u32 data) | |
1130 | { | |
1131 | netif_tx_lock_bh(dev); | |
1132 | ethtool_op_set_tx_csum(dev, data); | |
1133 | netif_tx_unlock_bh(dev); | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | static const struct ethtool_ops greth_ethtool_ops = { | |
1138 | .get_msglevel = greth_get_msglevel, | |
1139 | .set_msglevel = greth_set_msglevel, | |
1140 | .get_settings = greth_get_settings, | |
1141 | .set_settings = greth_set_settings, | |
1142 | .get_drvinfo = greth_get_drvinfo, | |
1143 | .get_regs_len = greth_get_regs_len, | |
1144 | .get_regs = greth_get_regs, | |
1145 | .get_rx_csum = greth_get_rx_csum, | |
1146 | .set_rx_csum = greth_set_rx_csum, | |
1147 | .get_tx_csum = greth_get_tx_csum, | |
1148 | .set_tx_csum = greth_set_tx_csum, | |
1149 | .get_link = ethtool_op_get_link, | |
1150 | }; | |
1151 | ||
1152 | static struct net_device_ops greth_netdev_ops = { | |
1153 | .ndo_open = greth_open, | |
1154 | .ndo_stop = greth_close, | |
1155 | .ndo_start_xmit = greth_start_xmit, | |
1156 | .ndo_set_mac_address = greth_set_mac_add, | |
6e03718c | 1157 | .ndo_validate_addr = eth_validate_addr, |
d4c41139 KG |
1158 | }; |
1159 | ||
1160 | static inline int wait_for_mdio(struct greth_private *greth) | |
1161 | { | |
1162 | unsigned long timeout = jiffies + 4*HZ/100; | |
1163 | while (GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_BUSY) { | |
1164 | if (time_after(jiffies, timeout)) | |
1165 | return 0; | |
1166 | } | |
1167 | return 1; | |
1168 | } | |
1169 | ||
1170 | static int greth_mdio_read(struct mii_bus *bus, int phy, int reg) | |
1171 | { | |
1172 | struct greth_private *greth = bus->priv; | |
1173 | int data; | |
1174 | ||
1175 | if (!wait_for_mdio(greth)) | |
1176 | return -EBUSY; | |
1177 | ||
1178 | GRETH_REGSAVE(greth->regs->mdio, ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 2); | |
1179 | ||
1180 | if (!wait_for_mdio(greth)) | |
1181 | return -EBUSY; | |
1182 | ||
1183 | if (!(GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_NVALID)) { | |
1184 | data = (GRETH_REGLOAD(greth->regs->mdio) >> 16) & 0xFFFF; | |
1185 | return data; | |
1186 | ||
1187 | } else { | |
1188 | return -1; | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | static int greth_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) | |
1193 | { | |
1194 | struct greth_private *greth = bus->priv; | |
1195 | ||
1196 | if (!wait_for_mdio(greth)) | |
1197 | return -EBUSY; | |
1198 | ||
1199 | GRETH_REGSAVE(greth->regs->mdio, | |
1200 | ((val & 0xFFFF) << 16) | ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 1); | |
1201 | ||
1202 | if (!wait_for_mdio(greth)) | |
1203 | return -EBUSY; | |
1204 | ||
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | static int greth_mdio_reset(struct mii_bus *bus) | |
1209 | { | |
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | static void greth_link_change(struct net_device *dev) | |
1214 | { | |
1215 | struct greth_private *greth = netdev_priv(dev); | |
1216 | struct phy_device *phydev = greth->phy; | |
1217 | unsigned long flags; | |
1218 | ||
1219 | int status_change = 0; | |
1220 | ||
1221 | spin_lock_irqsave(&greth->devlock, flags); | |
1222 | ||
1223 | if (phydev->link) { | |
1224 | ||
1225 | if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) { | |
1226 | ||
1227 | GRETH_REGANDIN(greth->regs->control, | |
1228 | ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB)); | |
1229 | ||
1230 | if (phydev->duplex) | |
1231 | GRETH_REGORIN(greth->regs->control, GRETH_CTRL_FD); | |
1232 | ||
1233 | if (phydev->speed == SPEED_100) { | |
1234 | ||
1235 | GRETH_REGORIN(greth->regs->control, GRETH_CTRL_SP); | |
1236 | } | |
1237 | ||
1238 | else if (phydev->speed == SPEED_1000) | |
1239 | GRETH_REGORIN(greth->regs->control, GRETH_CTRL_GB); | |
1240 | ||
1241 | greth->speed = phydev->speed; | |
1242 | greth->duplex = phydev->duplex; | |
1243 | status_change = 1; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | if (phydev->link != greth->link) { | |
1248 | if (!phydev->link) { | |
1249 | greth->speed = 0; | |
1250 | greth->duplex = -1; | |
1251 | } | |
1252 | greth->link = phydev->link; | |
1253 | ||
1254 | status_change = 1; | |
1255 | } | |
1256 | ||
1257 | spin_unlock_irqrestore(&greth->devlock, flags); | |
1258 | ||
1259 | if (status_change) { | |
1260 | if (phydev->link) | |
1261 | pr_debug("%s: link up (%d/%s)\n", | |
1262 | dev->name, phydev->speed, | |
1263 | DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); | |
1264 | else | |
1265 | pr_debug("%s: link down\n", dev->name); | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | static int greth_mdio_probe(struct net_device *dev) | |
1270 | { | |
1271 | struct greth_private *greth = netdev_priv(dev); | |
1272 | struct phy_device *phy = NULL; | |
6e03718c | 1273 | int ret; |
d4c41139 KG |
1274 | |
1275 | /* Find the first PHY */ | |
6e03718c | 1276 | phy = phy_find_first(greth->mdio); |
1277 | ||
d4c41139 KG |
1278 | if (!phy) { |
1279 | if (netif_msg_probe(greth)) | |
1280 | dev_err(&dev->dev, "no PHY found\n"); | |
1281 | return -ENXIO; | |
1282 | } | |
1283 | ||
6e03718c | 1284 | ret = phy_connect_direct(dev, phy, &greth_link_change, |
1285 | 0, greth->gbit_mac ? | |
1286 | PHY_INTERFACE_MODE_GMII : | |
1287 | PHY_INTERFACE_MODE_MII); | |
1288 | if (ret) { | |
1289 | if (netif_msg_ifup(greth)) | |
1290 | dev_err(&dev->dev, "could not attach to PHY\n"); | |
1291 | return ret; | |
1292 | } | |
d4c41139 KG |
1293 | |
1294 | if (greth->gbit_mac) | |
1295 | phy->supported &= PHY_GBIT_FEATURES; | |
1296 | else | |
1297 | phy->supported &= PHY_BASIC_FEATURES; | |
1298 | ||
1299 | phy->advertising = phy->supported; | |
1300 | ||
d4c41139 KG |
1301 | greth->link = 0; |
1302 | greth->speed = 0; | |
1303 | greth->duplex = -1; | |
1304 | greth->phy = phy; | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | static inline int phy_aneg_done(struct phy_device *phydev) | |
1310 | { | |
1311 | int retval; | |
1312 | ||
1313 | retval = phy_read(phydev, MII_BMSR); | |
1314 | ||
1315 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1316 | } | |
1317 | ||
1318 | static int greth_mdio_init(struct greth_private *greth) | |
1319 | { | |
1320 | int ret, phy; | |
1321 | unsigned long timeout; | |
1322 | ||
1323 | greth->mdio = mdiobus_alloc(); | |
1324 | if (!greth->mdio) { | |
1325 | return -ENOMEM; | |
1326 | } | |
1327 | ||
1328 | greth->mdio->name = "greth-mdio"; | |
1329 | snprintf(greth->mdio->id, MII_BUS_ID_SIZE, "%s-%d", greth->mdio->name, greth->irq); | |
1330 | greth->mdio->read = greth_mdio_read; | |
1331 | greth->mdio->write = greth_mdio_write; | |
1332 | greth->mdio->reset = greth_mdio_reset; | |
1333 | greth->mdio->priv = greth; | |
1334 | ||
1335 | greth->mdio->irq = greth->mdio_irqs; | |
1336 | ||
1337 | for (phy = 0; phy < PHY_MAX_ADDR; phy++) | |
1338 | greth->mdio->irq[phy] = PHY_POLL; | |
1339 | ||
1340 | ret = mdiobus_register(greth->mdio); | |
1341 | if (ret) { | |
1342 | goto error; | |
1343 | } | |
1344 | ||
1345 | ret = greth_mdio_probe(greth->netdev); | |
1346 | if (ret) { | |
1347 | if (netif_msg_probe(greth)) | |
1348 | dev_err(&greth->netdev->dev, "failed to probe MDIO bus\n"); | |
1349 | goto unreg_mdio; | |
1350 | } | |
1351 | ||
1352 | phy_start(greth->phy); | |
1353 | ||
1354 | /* If Ethernet debug link is used make autoneg happen right away */ | |
1355 | if (greth->edcl && greth_edcl == 1) { | |
1356 | phy_start_aneg(greth->phy); | |
1357 | timeout = jiffies + 6*HZ; | |
1358 | while (!phy_aneg_done(greth->phy) && time_before(jiffies, timeout)) { | |
1359 | } | |
1360 | genphy_read_status(greth->phy); | |
1361 | greth_link_change(greth->netdev); | |
1362 | } | |
1363 | ||
1364 | return 0; | |
1365 | ||
1366 | unreg_mdio: | |
1367 | mdiobus_unregister(greth->mdio); | |
1368 | error: | |
1369 | mdiobus_free(greth->mdio); | |
1370 | return ret; | |
1371 | } | |
1372 | ||
1373 | /* Initialize the GRETH MAC */ | |
1374 | static int __devinit greth_of_probe(struct of_device *ofdev, const struct of_device_id *match) | |
1375 | { | |
1376 | struct net_device *dev; | |
1377 | struct greth_private *greth; | |
1378 | struct greth_regs *regs; | |
1379 | ||
1380 | int i; | |
1381 | int err; | |
1382 | int tmp; | |
1383 | unsigned long timeout; | |
1384 | ||
1385 | dev = alloc_etherdev(sizeof(struct greth_private)); | |
1386 | ||
1387 | if (dev == NULL) | |
1388 | return -ENOMEM; | |
1389 | ||
1390 | greth = netdev_priv(dev); | |
1391 | greth->netdev = dev; | |
1392 | greth->dev = &ofdev->dev; | |
1393 | ||
1394 | if (greth_debug > 0) | |
1395 | greth->msg_enable = greth_debug; | |
1396 | else | |
1397 | greth->msg_enable = GRETH_DEF_MSG_ENABLE; | |
1398 | ||
1399 | spin_lock_init(&greth->devlock); | |
1400 | ||
1401 | greth->regs = of_ioremap(&ofdev->resource[0], 0, | |
1402 | resource_size(&ofdev->resource[0]), | |
1403 | "grlib-greth regs"); | |
1404 | ||
1405 | if (greth->regs == NULL) { | |
1406 | if (netif_msg_probe(greth)) | |
1407 | dev_err(greth->dev, "ioremap failure.\n"); | |
1408 | err = -EIO; | |
1409 | goto error1; | |
1410 | } | |
1411 | ||
1412 | regs = (struct greth_regs *) greth->regs; | |
1413 | greth->irq = ofdev->irqs[0]; | |
1414 | ||
1415 | dev_set_drvdata(greth->dev, dev); | |
1416 | SET_NETDEV_DEV(dev, greth->dev); | |
1417 | ||
1418 | if (netif_msg_probe(greth)) | |
1419 | dev_dbg(greth->dev, "reseting controller.\n"); | |
1420 | ||
1421 | /* Reset the controller. */ | |
1422 | GRETH_REGSAVE(regs->control, GRETH_RESET); | |
1423 | ||
1424 | /* Wait for MAC to reset itself */ | |
1425 | timeout = jiffies + HZ/100; | |
1426 | while (GRETH_REGLOAD(regs->control) & GRETH_RESET) { | |
1427 | if (time_after(jiffies, timeout)) { | |
1428 | err = -EIO; | |
1429 | if (netif_msg_probe(greth)) | |
1430 | dev_err(greth->dev, "timeout when waiting for reset.\n"); | |
1431 | goto error2; | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | /* Get default PHY address */ | |
1436 | greth->phyaddr = (GRETH_REGLOAD(regs->mdio) >> 11) & 0x1F; | |
1437 | ||
1438 | /* Check if we have GBIT capable MAC */ | |
1439 | tmp = GRETH_REGLOAD(regs->control); | |
1440 | greth->gbit_mac = (tmp >> 27) & 1; | |
1441 | ||
1442 | /* Check for multicast capability */ | |
1443 | greth->multicast = (tmp >> 25) & 1; | |
1444 | ||
1445 | greth->edcl = (tmp >> 31) & 1; | |
1446 | ||
1447 | /* If we have EDCL we disable the EDCL speed-duplex FSM so | |
1448 | * it doesn't interfere with the software */ | |
1449 | if (greth->edcl != 0) | |
1450 | GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX); | |
1451 | ||
1452 | /* Check if MAC can handle MDIO interrupts */ | |
1453 | greth->mdio_int_en = (tmp >> 26) & 1; | |
1454 | ||
1455 | err = greth_mdio_init(greth); | |
1456 | if (err) { | |
1457 | if (netif_msg_probe(greth)) | |
1458 | dev_err(greth->dev, "failed to register MDIO bus\n"); | |
1459 | goto error2; | |
1460 | } | |
1461 | ||
1462 | /* Allocate TX descriptor ring in coherent memory */ | |
1463 | greth->tx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev, | |
1464 | 1024, | |
1465 | &greth->tx_bd_base_phys, | |
1466 | GFP_KERNEL); | |
1467 | ||
1468 | if (!greth->tx_bd_base) { | |
1469 | if (netif_msg_probe(greth)) | |
1470 | dev_err(&dev->dev, "could not allocate descriptor memory.\n"); | |
1471 | err = -ENOMEM; | |
1472 | goto error3; | |
1473 | } | |
1474 | ||
1475 | memset(greth->tx_bd_base, 0, 1024); | |
1476 | ||
1477 | /* Allocate RX descriptor ring in coherent memory */ | |
1478 | greth->rx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev, | |
1479 | 1024, | |
1480 | &greth->rx_bd_base_phys, | |
1481 | GFP_KERNEL); | |
1482 | ||
1483 | if (!greth->rx_bd_base) { | |
1484 | if (netif_msg_probe(greth)) | |
1485 | dev_err(greth->dev, "could not allocate descriptor memory.\n"); | |
1486 | err = -ENOMEM; | |
1487 | goto error4; | |
1488 | } | |
1489 | ||
1490 | memset(greth->rx_bd_base, 0, 1024); | |
1491 | ||
1492 | /* Get MAC address from: module param, OF property or ID prom */ | |
1493 | for (i = 0; i < 6; i++) { | |
1494 | if (macaddr[i] != 0) | |
1495 | break; | |
1496 | } | |
1497 | if (i == 6) { | |
1498 | const unsigned char *addr; | |
1499 | int len; | |
1500 | addr = of_get_property(ofdev->node, "local-mac-address", &len); | |
1501 | if (addr != NULL && len == 6) { | |
1502 | for (i = 0; i < 6; i++) | |
1503 | macaddr[i] = (unsigned int) addr[i]; | |
1504 | } else { | |
1505 | #ifdef CONFIG_SPARC | |
1506 | for (i = 0; i < 6; i++) | |
1507 | macaddr[i] = (unsigned int) idprom->id_ethaddr[i]; | |
1508 | #endif | |
1509 | } | |
1510 | } | |
1511 | ||
1512 | for (i = 0; i < 6; i++) | |
1513 | dev->dev_addr[i] = macaddr[i]; | |
1514 | ||
1515 | macaddr[5]++; | |
1516 | ||
1517 | if (!is_valid_ether_addr(&dev->dev_addr[0])) { | |
1518 | if (netif_msg_probe(greth)) | |
1519 | dev_err(greth->dev, "no valid ethernet address, aborting.\n"); | |
1520 | err = -EINVAL; | |
1521 | goto error5; | |
1522 | } | |
1523 | ||
1524 | GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); | |
1525 | GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | | |
1526 | dev->dev_addr[4] << 8 | dev->dev_addr[5]); | |
1527 | ||
1528 | /* Clear all pending interrupts except PHY irq */ | |
1529 | GRETH_REGSAVE(regs->status, 0xFF); | |
1530 | ||
1531 | if (greth->gbit_mac) { | |
1532 | dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_HIGHDMA; | |
1533 | greth_netdev_ops.ndo_start_xmit = greth_start_xmit_gbit; | |
1534 | greth->flags = GRETH_FLAG_RX_CSUM; | |
1535 | } | |
1536 | ||
1537 | if (greth->multicast) { | |
1538 | greth_netdev_ops.ndo_set_multicast_list = greth_set_multicast_list; | |
1539 | dev->flags |= IFF_MULTICAST; | |
1540 | } else { | |
1541 | dev->flags &= ~IFF_MULTICAST; | |
1542 | } | |
1543 | ||
1544 | dev->netdev_ops = &greth_netdev_ops; | |
1545 | dev->ethtool_ops = &greth_ethtool_ops; | |
1546 | ||
1547 | if (register_netdev(dev)) { | |
1548 | if (netif_msg_probe(greth)) | |
1549 | dev_err(greth->dev, "netdevice registration failed.\n"); | |
1550 | err = -ENOMEM; | |
1551 | goto error5; | |
1552 | } | |
1553 | ||
1554 | /* setup NAPI */ | |
1555 | memset(&greth->napi, 0, sizeof(greth->napi)); | |
1556 | netif_napi_add(dev, &greth->napi, greth_poll, 64); | |
1557 | ||
1558 | return 0; | |
1559 | ||
1560 | error5: | |
1561 | dma_free_coherent(greth->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1562 | error4: | |
1563 | dma_free_coherent(greth->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1564 | error3: | |
1565 | mdiobus_unregister(greth->mdio); | |
1566 | error2: | |
1567 | of_iounmap(&ofdev->resource[0], greth->regs, resource_size(&ofdev->resource[0])); | |
1568 | error1: | |
1569 | free_netdev(dev); | |
1570 | return err; | |
1571 | } | |
1572 | ||
1573 | static int __devexit greth_of_remove(struct of_device *of_dev) | |
1574 | { | |
1575 | struct net_device *ndev = dev_get_drvdata(&of_dev->dev); | |
1576 | struct greth_private *greth = netdev_priv(ndev); | |
1577 | ||
1578 | /* Free descriptor areas */ | |
1579 | dma_free_coherent(&of_dev->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1580 | ||
1581 | dma_free_coherent(&of_dev->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1582 | ||
1583 | dev_set_drvdata(&of_dev->dev, NULL); | |
1584 | ||
1585 | if (greth->phy) | |
1586 | phy_stop(greth->phy); | |
1587 | mdiobus_unregister(greth->mdio); | |
1588 | ||
1589 | unregister_netdev(ndev); | |
1590 | free_netdev(ndev); | |
1591 | ||
1592 | of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0])); | |
1593 | ||
1594 | return 0; | |
1595 | } | |
1596 | ||
1597 | static struct of_device_id greth_of_match[] = { | |
1598 | { | |
1599 | .name = "GAISLER_ETHMAC", | |
1600 | }, | |
1601 | {}, | |
1602 | }; | |
1603 | ||
1604 | MODULE_DEVICE_TABLE(of, greth_of_match); | |
1605 | ||
1606 | static struct of_platform_driver greth_of_driver = { | |
1607 | .name = "grlib-greth", | |
1608 | .match_table = greth_of_match, | |
1609 | .probe = greth_of_probe, | |
1610 | .remove = __devexit_p(greth_of_remove), | |
1611 | .driver = { | |
1612 | .owner = THIS_MODULE, | |
1613 | .name = "grlib-greth", | |
1614 | }, | |
1615 | }; | |
1616 | ||
1617 | static int __init greth_init(void) | |
1618 | { | |
1619 | return of_register_platform_driver(&greth_of_driver); | |
1620 | } | |
1621 | ||
1622 | static void __exit greth_cleanup(void) | |
1623 | { | |
1624 | of_unregister_platform_driver(&greth_of_driver); | |
1625 | } | |
1626 | ||
1627 | module_init(greth_init); | |
1628 | module_exit(greth_cleanup); | |
1629 | ||
1630 | MODULE_AUTHOR("Aeroflex Gaisler AB."); | |
1631 | MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver"); | |
1632 | MODULE_LICENSE("GPL"); |