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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> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
d4c41139 KG |
38 | #include <asm/cacheflush.h> |
39 | #include <asm/byteorder.h> | |
40 | ||
41 | #ifdef CONFIG_SPARC | |
42 | #include <asm/idprom.h> | |
43 | #endif | |
44 | ||
45 | #include "greth.h" | |
46 | ||
47 | #define GRETH_DEF_MSG_ENABLE \ | |
48 | (NETIF_MSG_DRV | \ | |
49 | NETIF_MSG_PROBE | \ | |
50 | NETIF_MSG_LINK | \ | |
51 | NETIF_MSG_IFDOWN | \ | |
52 | NETIF_MSG_IFUP | \ | |
53 | NETIF_MSG_RX_ERR | \ | |
54 | NETIF_MSG_TX_ERR) | |
55 | ||
56 | static int greth_debug = -1; /* -1 == use GRETH_DEF_MSG_ENABLE as value */ | |
57 | module_param(greth_debug, int, 0); | |
58 | MODULE_PARM_DESC(greth_debug, "GRETH bitmapped debugging message enable value"); | |
59 | ||
60 | /* Accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */ | |
61 | static int macaddr[6]; | |
62 | module_param_array(macaddr, int, NULL, 0); | |
63 | MODULE_PARM_DESC(macaddr, "GRETH Ethernet MAC address"); | |
64 | ||
65 | static int greth_edcl = 1; | |
66 | module_param(greth_edcl, int, 0); | |
67 | MODULE_PARM_DESC(greth_edcl, "GRETH EDCL usage indicator. Set to 1 if EDCL is used."); | |
68 | ||
69 | static int greth_open(struct net_device *dev); | |
41a655ba | 70 | static netdev_tx_t greth_start_xmit(struct sk_buff *skb, |
71 | struct net_device *dev); | |
72 | static netdev_tx_t greth_start_xmit_gbit(struct sk_buff *skb, | |
73 | struct net_device *dev); | |
d4c41139 KG |
74 | static int greth_rx(struct net_device *dev, int limit); |
75 | static int greth_rx_gbit(struct net_device *dev, int limit); | |
76 | static void greth_clean_tx(struct net_device *dev); | |
77 | static void greth_clean_tx_gbit(struct net_device *dev); | |
78 | static irqreturn_t greth_interrupt(int irq, void *dev_id); | |
79 | static int greth_close(struct net_device *dev); | |
80 | static int greth_set_mac_add(struct net_device *dev, void *p); | |
81 | static void greth_set_multicast_list(struct net_device *dev); | |
82 | ||
83 | #define GRETH_REGLOAD(a) (be32_to_cpu(__raw_readl(&(a)))) | |
84 | #define GRETH_REGSAVE(a, v) (__raw_writel(cpu_to_be32(v), &(a))) | |
85 | #define GRETH_REGORIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v)))) | |
86 | #define GRETH_REGANDIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v)))) | |
87 | ||
88 | #define NEXT_TX(N) (((N) + 1) & GRETH_TXBD_NUM_MASK) | |
89 | #define SKIP_TX(N, C) (((N) + C) & GRETH_TXBD_NUM_MASK) | |
90 | #define NEXT_RX(N) (((N) + 1) & GRETH_RXBD_NUM_MASK) | |
91 | ||
92 | static void greth_print_rx_packet(void *addr, int len) | |
93 | { | |
94 | print_hex_dump(KERN_DEBUG, "RX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
95 | addr, len, true); | |
96 | } | |
97 | ||
98 | static void greth_print_tx_packet(struct sk_buff *skb) | |
99 | { | |
100 | int i; | |
101 | int length; | |
102 | ||
103 | if (skb_shinfo(skb)->nr_frags == 0) | |
104 | length = skb->len; | |
105 | else | |
106 | length = skb_headlen(skb); | |
107 | ||
108 | print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
109 | skb->data, length, true); | |
110 | ||
111 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
112 | ||
113 | print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
114 | phys_to_virt(page_to_phys(skb_shinfo(skb)->frags[i].page)) + | |
115 | skb_shinfo(skb)->frags[i].page_offset, | |
116 | length, true); | |
117 | } | |
118 | } | |
119 | ||
120 | static inline void greth_enable_tx(struct greth_private *greth) | |
121 | { | |
122 | wmb(); | |
123 | GRETH_REGORIN(greth->regs->control, GRETH_TXEN); | |
124 | } | |
125 | ||
126 | static inline void greth_disable_tx(struct greth_private *greth) | |
127 | { | |
128 | GRETH_REGANDIN(greth->regs->control, ~GRETH_TXEN); | |
129 | } | |
130 | ||
131 | static inline void greth_enable_rx(struct greth_private *greth) | |
132 | { | |
133 | wmb(); | |
134 | GRETH_REGORIN(greth->regs->control, GRETH_RXEN); | |
135 | } | |
136 | ||
137 | static inline void greth_disable_rx(struct greth_private *greth) | |
138 | { | |
139 | GRETH_REGANDIN(greth->regs->control, ~GRETH_RXEN); | |
140 | } | |
141 | ||
142 | static inline void greth_enable_irqs(struct greth_private *greth) | |
143 | { | |
144 | GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI); | |
145 | } | |
146 | ||
147 | static inline void greth_disable_irqs(struct greth_private *greth) | |
148 | { | |
149 | GRETH_REGANDIN(greth->regs->control, ~(GRETH_RXI|GRETH_TXI)); | |
150 | } | |
151 | ||
152 | static inline void greth_write_bd(u32 *bd, u32 val) | |
153 | { | |
154 | __raw_writel(cpu_to_be32(val), bd); | |
155 | } | |
156 | ||
157 | static inline u32 greth_read_bd(u32 *bd) | |
158 | { | |
159 | return be32_to_cpu(__raw_readl(bd)); | |
160 | } | |
161 | ||
162 | static void greth_clean_rings(struct greth_private *greth) | |
163 | { | |
164 | int i; | |
165 | struct greth_bd *rx_bdp = greth->rx_bd_base; | |
166 | struct greth_bd *tx_bdp = greth->tx_bd_base; | |
167 | ||
168 | if (greth->gbit_mac) { | |
169 | ||
170 | /* Free and unmap RX buffers */ | |
171 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
172 | if (greth->rx_skbuff[i] != NULL) { | |
173 | dev_kfree_skb(greth->rx_skbuff[i]); | |
174 | dma_unmap_single(greth->dev, | |
175 | greth_read_bd(&rx_bdp->addr), | |
176 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
177 | DMA_FROM_DEVICE); | |
178 | } | |
179 | } | |
180 | ||
181 | /* TX buffers */ | |
182 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
183 | ||
184 | struct sk_buff *skb = greth->tx_skbuff[greth->tx_last]; | |
185 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
186 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
187 | greth->tx_last = NEXT_TX(greth->tx_last); | |
188 | ||
189 | dma_unmap_single(greth->dev, | |
190 | greth_read_bd(&tx_bdp->addr), | |
191 | skb_headlen(skb), | |
192 | DMA_TO_DEVICE); | |
193 | ||
194 | for (i = 0; i < nr_frags; i++) { | |
195 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
196 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
197 | ||
198 | dma_unmap_page(greth->dev, | |
199 | greth_read_bd(&tx_bdp->addr), | |
200 | frag->size, | |
201 | DMA_TO_DEVICE); | |
202 | ||
203 | greth->tx_last = NEXT_TX(greth->tx_last); | |
204 | } | |
205 | greth->tx_free += nr_frags+1; | |
206 | dev_kfree_skb(skb); | |
207 | } | |
208 | ||
209 | ||
210 | } else { /* 10/100 Mbps MAC */ | |
211 | ||
212 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
213 | kfree(greth->rx_bufs[i]); | |
214 | dma_unmap_single(greth->dev, | |
215 | greth_read_bd(&rx_bdp->addr), | |
216 | MAX_FRAME_SIZE, | |
217 | DMA_FROM_DEVICE); | |
218 | } | |
219 | for (i = 0; i < GRETH_TXBD_NUM; i++, tx_bdp++) { | |
220 | kfree(greth->tx_bufs[i]); | |
221 | dma_unmap_single(greth->dev, | |
222 | greth_read_bd(&tx_bdp->addr), | |
223 | MAX_FRAME_SIZE, | |
224 | DMA_TO_DEVICE); | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | static int greth_init_rings(struct greth_private *greth) | |
230 | { | |
231 | struct sk_buff *skb; | |
232 | struct greth_bd *rx_bd, *tx_bd; | |
233 | u32 dma_addr; | |
234 | int i; | |
235 | ||
236 | rx_bd = greth->rx_bd_base; | |
237 | tx_bd = greth->tx_bd_base; | |
238 | ||
239 | /* Initialize descriptor rings and buffers */ | |
240 | if (greth->gbit_mac) { | |
241 | ||
242 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
243 | skb = netdev_alloc_skb(greth->netdev, MAX_FRAME_SIZE+NET_IP_ALIGN); | |
244 | if (skb == NULL) { | |
245 | if (netif_msg_ifup(greth)) | |
246 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
247 | goto cleanup; | |
248 | } | |
249 | skb_reserve(skb, NET_IP_ALIGN); | |
250 | dma_addr = dma_map_single(greth->dev, | |
251 | skb->data, | |
252 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
253 | DMA_FROM_DEVICE); | |
254 | ||
255 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
256 | if (netif_msg_ifup(greth)) | |
257 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
258 | goto cleanup; | |
259 | } | |
260 | greth->rx_skbuff[i] = skb; | |
261 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
262 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
263 | } | |
264 | ||
265 | } else { | |
266 | ||
267 | /* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */ | |
268 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
269 | ||
270 | greth->rx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
271 | ||
272 | if (greth->rx_bufs[i] == NULL) { | |
273 | if (netif_msg_ifup(greth)) | |
274 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
275 | goto cleanup; | |
276 | } | |
277 | ||
278 | dma_addr = dma_map_single(greth->dev, | |
279 | greth->rx_bufs[i], | |
280 | MAX_FRAME_SIZE, | |
281 | DMA_FROM_DEVICE); | |
282 | ||
283 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
284 | if (netif_msg_ifup(greth)) | |
285 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
286 | goto cleanup; | |
287 | } | |
288 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
289 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
290 | } | |
291 | for (i = 0; i < GRETH_TXBD_NUM; i++) { | |
292 | ||
293 | greth->tx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
294 | ||
295 | if (greth->tx_bufs[i] == NULL) { | |
296 | if (netif_msg_ifup(greth)) | |
297 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
298 | goto cleanup; | |
299 | } | |
300 | ||
301 | dma_addr = dma_map_single(greth->dev, | |
302 | greth->tx_bufs[i], | |
303 | MAX_FRAME_SIZE, | |
304 | DMA_TO_DEVICE); | |
305 | ||
306 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
307 | if (netif_msg_ifup(greth)) | |
308 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
309 | goto cleanup; | |
310 | } | |
311 | greth_write_bd(&tx_bd[i].addr, dma_addr); | |
312 | greth_write_bd(&tx_bd[i].stat, 0); | |
313 | } | |
314 | } | |
315 | greth_write_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat, | |
316 | greth_read_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat) | GRETH_BD_WR); | |
317 | ||
318 | /* Initialize pointers. */ | |
319 | greth->rx_cur = 0; | |
320 | greth->tx_next = 0; | |
321 | greth->tx_last = 0; | |
322 | greth->tx_free = GRETH_TXBD_NUM; | |
323 | ||
324 | /* Initialize descriptor base address */ | |
325 | GRETH_REGSAVE(greth->regs->tx_desc_p, greth->tx_bd_base_phys); | |
326 | GRETH_REGSAVE(greth->regs->rx_desc_p, greth->rx_bd_base_phys); | |
327 | ||
328 | return 0; | |
329 | ||
330 | cleanup: | |
331 | greth_clean_rings(greth); | |
332 | return -ENOMEM; | |
333 | } | |
334 | ||
335 | static int greth_open(struct net_device *dev) | |
336 | { | |
337 | struct greth_private *greth = netdev_priv(dev); | |
338 | int err; | |
339 | ||
340 | err = greth_init_rings(greth); | |
341 | if (err) { | |
342 | if (netif_msg_ifup(greth)) | |
343 | dev_err(&dev->dev, "Could not allocate memory for DMA rings\n"); | |
344 | return err; | |
345 | } | |
346 | ||
347 | err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev); | |
348 | if (err) { | |
349 | if (netif_msg_ifup(greth)) | |
350 | dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq); | |
351 | greth_clean_rings(greth); | |
352 | return err; | |
353 | } | |
354 | ||
355 | if (netif_msg_ifup(greth)) | |
356 | dev_dbg(&dev->dev, " starting queue\n"); | |
357 | netif_start_queue(dev); | |
358 | ||
bbe9e637 DH |
359 | GRETH_REGSAVE(greth->regs->status, 0xFF); |
360 | ||
d4c41139 KG |
361 | napi_enable(&greth->napi); |
362 | ||
363 | greth_enable_irqs(greth); | |
364 | greth_enable_tx(greth); | |
365 | greth_enable_rx(greth); | |
366 | return 0; | |
367 | ||
368 | } | |
369 | ||
370 | static int greth_close(struct net_device *dev) | |
371 | { | |
372 | struct greth_private *greth = netdev_priv(dev); | |
373 | ||
374 | napi_disable(&greth->napi); | |
375 | ||
bbe9e637 | 376 | greth_disable_irqs(greth); |
d4c41139 | 377 | greth_disable_tx(greth); |
bbe9e637 | 378 | greth_disable_rx(greth); |
d4c41139 KG |
379 | |
380 | netif_stop_queue(dev); | |
381 | ||
382 | free_irq(greth->irq, (void *) dev); | |
383 | ||
384 | greth_clean_rings(greth); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
41a655ba | 389 | static netdev_tx_t |
390 | greth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
d4c41139 KG |
391 | { |
392 | struct greth_private *greth = netdev_priv(dev); | |
393 | struct greth_bd *bdp; | |
394 | int err = NETDEV_TX_OK; | |
395 | u32 status, dma_addr; | |
396 | ||
397 | bdp = greth->tx_bd_base + greth->tx_next; | |
398 | ||
399 | if (unlikely(greth->tx_free <= 0)) { | |
400 | netif_stop_queue(dev); | |
401 | return NETDEV_TX_BUSY; | |
402 | } | |
403 | ||
404 | if (netif_msg_pktdata(greth)) | |
405 | greth_print_tx_packet(skb); | |
406 | ||
407 | ||
408 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
409 | dev->stats.tx_errors++; | |
410 | goto out; | |
411 | } | |
412 | ||
413 | dma_addr = greth_read_bd(&bdp->addr); | |
414 | ||
415 | memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len); | |
416 | ||
417 | dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE); | |
418 | ||
419 | status = GRETH_BD_EN | (skb->len & GRETH_BD_LEN); | |
420 | ||
421 | /* Wrap around descriptor ring */ | |
422 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) { | |
423 | status |= GRETH_BD_WR; | |
424 | } | |
425 | ||
426 | greth->tx_next = NEXT_TX(greth->tx_next); | |
427 | greth->tx_free--; | |
428 | ||
429 | /* No more descriptors */ | |
430 | if (unlikely(greth->tx_free == 0)) { | |
431 | ||
432 | /* Free transmitted descriptors */ | |
433 | greth_clean_tx(dev); | |
434 | ||
435 | /* If nothing was cleaned, stop queue & wait for irq */ | |
436 | if (unlikely(greth->tx_free == 0)) { | |
437 | status |= GRETH_BD_IE; | |
438 | netif_stop_queue(dev); | |
439 | } | |
440 | } | |
441 | ||
442 | /* Write descriptor control word and enable transmission */ | |
443 | greth_write_bd(&bdp->stat, status); | |
444 | greth_enable_tx(greth); | |
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; | |
457 | u32 status = 0, dma_addr; | |
458 | int curr_tx, nr_frags, i, err = NETDEV_TX_OK; | |
459 | ||
460 | nr_frags = skb_shinfo(skb)->nr_frags; | |
461 | ||
462 | if (greth->tx_free < nr_frags + 1) { | |
463 | netif_stop_queue(dev); | |
464 | err = NETDEV_TX_BUSY; | |
465 | goto out; | |
466 | } | |
467 | ||
468 | if (netif_msg_pktdata(greth)) | |
469 | greth_print_tx_packet(skb); | |
470 | ||
471 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
472 | dev->stats.tx_errors++; | |
473 | goto out; | |
474 | } | |
475 | ||
476 | /* Save skb pointer. */ | |
477 | greth->tx_skbuff[greth->tx_next] = skb; | |
478 | ||
479 | /* Linear buf */ | |
480 | if (nr_frags != 0) | |
481 | status = GRETH_TXBD_MORE; | |
482 | ||
483 | status |= GRETH_TXBD_CSALL; | |
484 | status |= skb_headlen(skb) & GRETH_BD_LEN; | |
485 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) | |
486 | status |= GRETH_BD_WR; | |
487 | ||
488 | ||
489 | bdp = greth->tx_bd_base + greth->tx_next; | |
490 | greth_write_bd(&bdp->stat, status); | |
491 | dma_addr = dma_map_single(greth->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); | |
492 | ||
493 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
494 | goto map_error; | |
495 | ||
496 | greth_write_bd(&bdp->addr, dma_addr); | |
497 | ||
498 | curr_tx = NEXT_TX(greth->tx_next); | |
499 | ||
500 | /* Frags */ | |
501 | for (i = 0; i < nr_frags; i++) { | |
502 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
503 | greth->tx_skbuff[curr_tx] = NULL; | |
504 | bdp = greth->tx_bd_base + curr_tx; | |
505 | ||
2a2bc012 | 506 | status = GRETH_TXBD_CSALL | GRETH_BD_EN; |
d4c41139 KG |
507 | status |= frag->size & GRETH_BD_LEN; |
508 | ||
509 | /* Wrap around descriptor ring */ | |
510 | if (curr_tx == GRETH_TXBD_NUM_MASK) | |
511 | status |= GRETH_BD_WR; | |
512 | ||
513 | /* More fragments left */ | |
514 | if (i < nr_frags - 1) | |
515 | status |= GRETH_TXBD_MORE; | |
516 | ||
517 | /* ... last fragment, check if out of descriptors */ | |
518 | else if (greth->tx_free - nr_frags - 1 < (MAX_SKB_FRAGS + 1)) { | |
519 | ||
520 | /* Enable interrupts and stop queue */ | |
521 | status |= GRETH_BD_IE; | |
522 | netif_stop_queue(dev); | |
523 | } | |
524 | ||
525 | greth_write_bd(&bdp->stat, status); | |
526 | ||
527 | dma_addr = dma_map_page(greth->dev, | |
528 | frag->page, | |
529 | frag->page_offset, | |
530 | frag->size, | |
531 | DMA_TO_DEVICE); | |
532 | ||
533 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
534 | goto frag_map_error; | |
535 | ||
536 | greth_write_bd(&bdp->addr, dma_addr); | |
537 | ||
538 | curr_tx = NEXT_TX(curr_tx); | |
539 | } | |
540 | ||
541 | wmb(); | |
542 | ||
2a2bc012 DH |
543 | /* Enable the descriptor chain by enabling the first descriptor */ |
544 | bdp = greth->tx_bd_base + greth->tx_next; | |
545 | greth_write_bd(&bdp->stat, greth_read_bd(&bdp->stat) | GRETH_BD_EN); | |
546 | greth->tx_next = curr_tx; | |
547 | greth->tx_free -= nr_frags + 1; | |
548 | ||
549 | wmb(); | |
d4c41139 KG |
550 | |
551 | greth_enable_tx(greth); | |
552 | ||
553 | return NETDEV_TX_OK; | |
554 | ||
555 | frag_map_error: | |
2a2bc012 | 556 | /* Unmap SKB mappings that succeeded and disable descriptor */ |
d4c41139 KG |
557 | for (i = 0; greth->tx_next + i != curr_tx; i++) { |
558 | bdp = greth->tx_bd_base + greth->tx_next + i; | |
559 | dma_unmap_single(greth->dev, | |
560 | greth_read_bd(&bdp->addr), | |
561 | greth_read_bd(&bdp->stat) & GRETH_BD_LEN, | |
562 | DMA_TO_DEVICE); | |
2a2bc012 | 563 | greth_write_bd(&bdp->stat, 0); |
d4c41139 KG |
564 | } |
565 | map_error: | |
566 | if (net_ratelimit()) | |
567 | dev_warn(greth->dev, "Could not create TX DMA mapping\n"); | |
568 | dev_kfree_skb(skb); | |
d4c41139 KG |
569 | out: |
570 | return err; | |
571 | } | |
572 | ||
573 | ||
574 | static irqreturn_t greth_interrupt(int irq, void *dev_id) | |
575 | { | |
576 | struct net_device *dev = dev_id; | |
577 | struct greth_private *greth; | |
578 | u32 status; | |
579 | irqreturn_t retval = IRQ_NONE; | |
580 | ||
581 | greth = netdev_priv(dev); | |
582 | ||
583 | spin_lock(&greth->devlock); | |
584 | ||
585 | /* Get the interrupt events that caused us to be here. */ | |
586 | status = GRETH_REGLOAD(greth->regs->status); | |
587 | ||
588 | /* Handle rx and tx interrupts through poll */ | |
589 | if (status & (GRETH_INT_RX | GRETH_INT_TX)) { | |
590 | ||
591 | /* Clear interrupt status */ | |
592 | GRETH_REGORIN(greth->regs->status, | |
593 | status & (GRETH_INT_RX | GRETH_INT_TX)); | |
594 | ||
595 | retval = IRQ_HANDLED; | |
596 | ||
597 | /* Disable interrupts and schedule poll() */ | |
598 | greth_disable_irqs(greth); | |
599 | napi_schedule(&greth->napi); | |
600 | } | |
601 | ||
602 | mmiowb(); | |
603 | spin_unlock(&greth->devlock); | |
604 | ||
605 | return retval; | |
606 | } | |
607 | ||
608 | static void greth_clean_tx(struct net_device *dev) | |
609 | { | |
610 | struct greth_private *greth; | |
611 | struct greth_bd *bdp; | |
612 | u32 stat; | |
613 | ||
614 | greth = netdev_priv(dev); | |
615 | ||
616 | while (1) { | |
617 | bdp = greth->tx_bd_base + greth->tx_last; | |
618 | stat = greth_read_bd(&bdp->stat); | |
619 | ||
620 | if (unlikely(stat & GRETH_BD_EN)) | |
621 | break; | |
622 | ||
623 | if (greth->tx_free == GRETH_TXBD_NUM) | |
624 | break; | |
625 | ||
626 | /* Check status for errors */ | |
627 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
628 | dev->stats.tx_errors++; | |
629 | if (stat & GRETH_TXBD_ERR_AL) | |
630 | dev->stats.tx_aborted_errors++; | |
631 | if (stat & GRETH_TXBD_ERR_UE) | |
632 | dev->stats.tx_fifo_errors++; | |
633 | } | |
634 | dev->stats.tx_packets++; | |
635 | greth->tx_last = NEXT_TX(greth->tx_last); | |
636 | greth->tx_free++; | |
637 | } | |
638 | ||
639 | if (greth->tx_free > 0) { | |
640 | netif_wake_queue(dev); | |
641 | } | |
642 | ||
643 | } | |
644 | ||
645 | static inline void greth_update_tx_stats(struct net_device *dev, u32 stat) | |
646 | { | |
647 | /* Check status for errors */ | |
648 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
649 | dev->stats.tx_errors++; | |
650 | if (stat & GRETH_TXBD_ERR_AL) | |
651 | dev->stats.tx_aborted_errors++; | |
652 | if (stat & GRETH_TXBD_ERR_UE) | |
653 | dev->stats.tx_fifo_errors++; | |
654 | if (stat & GRETH_TXBD_ERR_LC) | |
655 | dev->stats.tx_aborted_errors++; | |
656 | } | |
657 | dev->stats.tx_packets++; | |
658 | } | |
659 | ||
660 | static void greth_clean_tx_gbit(struct net_device *dev) | |
661 | { | |
662 | struct greth_private *greth; | |
663 | struct greth_bd *bdp, *bdp_last_frag; | |
664 | struct sk_buff *skb; | |
665 | u32 stat; | |
666 | int nr_frags, i; | |
667 | ||
668 | greth = netdev_priv(dev); | |
669 | ||
670 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
671 | ||
672 | skb = greth->tx_skbuff[greth->tx_last]; | |
673 | ||
674 | nr_frags = skb_shinfo(skb)->nr_frags; | |
675 | ||
676 | /* We only clean fully completed SKBs */ | |
677 | bdp_last_frag = greth->tx_bd_base + SKIP_TX(greth->tx_last, nr_frags); | |
678 | stat = bdp_last_frag->stat; | |
679 | ||
680 | if (stat & GRETH_BD_EN) | |
681 | break; | |
682 | ||
683 | greth->tx_skbuff[greth->tx_last] = NULL; | |
684 | ||
685 | greth_update_tx_stats(dev, stat); | |
686 | ||
687 | bdp = greth->tx_bd_base + greth->tx_last; | |
688 | ||
689 | greth->tx_last = NEXT_TX(greth->tx_last); | |
690 | ||
691 | dma_unmap_single(greth->dev, | |
692 | greth_read_bd(&bdp->addr), | |
693 | skb_headlen(skb), | |
694 | DMA_TO_DEVICE); | |
695 | ||
696 | for (i = 0; i < nr_frags; i++) { | |
697 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
698 | bdp = greth->tx_bd_base + greth->tx_last; | |
699 | ||
700 | dma_unmap_page(greth->dev, | |
701 | greth_read_bd(&bdp->addr), | |
702 | frag->size, | |
703 | DMA_TO_DEVICE); | |
704 | ||
705 | greth->tx_last = NEXT_TX(greth->tx_last); | |
706 | } | |
707 | greth->tx_free += nr_frags+1; | |
708 | dev_kfree_skb(skb); | |
709 | } | |
710 | if (greth->tx_free > (MAX_SKB_FRAGS + 1)) { | |
711 | netif_wake_queue(dev); | |
712 | } | |
713 | } | |
714 | ||
715 | static int greth_pending_packets(struct greth_private *greth) | |
716 | { | |
717 | struct greth_bd *bdp; | |
718 | u32 status; | |
719 | bdp = greth->rx_bd_base + greth->rx_cur; | |
720 | status = greth_read_bd(&bdp->stat); | |
721 | if (status & GRETH_BD_EN) | |
722 | return 0; | |
723 | else | |
724 | return 1; | |
725 | } | |
726 | ||
727 | static int greth_rx(struct net_device *dev, int limit) | |
728 | { | |
729 | struct greth_private *greth; | |
730 | struct greth_bd *bdp; | |
731 | struct sk_buff *skb; | |
732 | int pkt_len; | |
733 | int bad, count; | |
734 | u32 status, dma_addr; | |
735 | ||
736 | greth = netdev_priv(dev); | |
737 | ||
738 | for (count = 0; count < limit; ++count) { | |
739 | ||
740 | bdp = greth->rx_bd_base + greth->rx_cur; | |
741 | status = greth_read_bd(&bdp->stat); | |
742 | dma_addr = greth_read_bd(&bdp->addr); | |
743 | bad = 0; | |
744 | ||
745 | if (unlikely(status & GRETH_BD_EN)) { | |
746 | break; | |
747 | } | |
748 | ||
749 | /* Check status for errors. */ | |
750 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
751 | if (status & GRETH_RXBD_ERR_FT) { | |
752 | dev->stats.rx_length_errors++; | |
753 | bad = 1; | |
754 | } | |
755 | if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) { | |
756 | dev->stats.rx_frame_errors++; | |
757 | bad = 1; | |
758 | } | |
759 | if (status & GRETH_RXBD_ERR_CRC) { | |
760 | dev->stats.rx_crc_errors++; | |
761 | bad = 1; | |
762 | } | |
763 | } | |
764 | if (unlikely(bad)) { | |
765 | dev->stats.rx_errors++; | |
766 | ||
767 | } else { | |
768 | ||
769 | pkt_len = status & GRETH_BD_LEN; | |
770 | ||
771 | skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN); | |
772 | ||
773 | if (unlikely(skb == NULL)) { | |
774 | ||
775 | if (net_ratelimit()) | |
776 | dev_warn(&dev->dev, "low on memory - " "packet dropped\n"); | |
777 | ||
778 | dev->stats.rx_dropped++; | |
779 | ||
780 | } else { | |
781 | skb_reserve(skb, NET_IP_ALIGN); | |
782 | skb->dev = dev; | |
783 | ||
784 | dma_sync_single_for_cpu(greth->dev, | |
785 | dma_addr, | |
786 | pkt_len, | |
787 | DMA_FROM_DEVICE); | |
788 | ||
789 | if (netif_msg_pktdata(greth)) | |
790 | greth_print_rx_packet(phys_to_virt(dma_addr), pkt_len); | |
791 | ||
792 | memcpy(skb_put(skb, pkt_len), phys_to_virt(dma_addr), pkt_len); | |
793 | ||
794 | skb->protocol = eth_type_trans(skb, dev); | |
795 | dev->stats.rx_packets++; | |
796 | netif_receive_skb(skb); | |
797 | } | |
798 | } | |
799 | ||
800 | status = GRETH_BD_EN | GRETH_BD_IE; | |
801 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
802 | status |= GRETH_BD_WR; | |
803 | } | |
804 | ||
805 | wmb(); | |
806 | greth_write_bd(&bdp->stat, status); | |
807 | ||
808 | dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE); | |
809 | ||
810 | greth_enable_rx(greth); | |
811 | ||
812 | greth->rx_cur = NEXT_RX(greth->rx_cur); | |
813 | } | |
814 | ||
815 | return count; | |
816 | } | |
817 | ||
818 | static inline int hw_checksummed(u32 status) | |
819 | { | |
820 | ||
821 | if (status & GRETH_RXBD_IP_FRAG) | |
822 | return 0; | |
823 | ||
824 | if (status & GRETH_RXBD_IP && status & GRETH_RXBD_IP_CSERR) | |
825 | return 0; | |
826 | ||
827 | if (status & GRETH_RXBD_UDP && status & GRETH_RXBD_UDP_CSERR) | |
828 | return 0; | |
829 | ||
830 | if (status & GRETH_RXBD_TCP && status & GRETH_RXBD_TCP_CSERR) | |
831 | return 0; | |
832 | ||
833 | return 1; | |
834 | } | |
835 | ||
836 | static int greth_rx_gbit(struct net_device *dev, int limit) | |
837 | { | |
838 | struct greth_private *greth; | |
839 | struct greth_bd *bdp; | |
840 | struct sk_buff *skb, *newskb; | |
841 | int pkt_len; | |
842 | int bad, count = 0; | |
843 | u32 status, dma_addr; | |
844 | ||
845 | greth = netdev_priv(dev); | |
846 | ||
847 | for (count = 0; count < limit; ++count) { | |
848 | ||
849 | bdp = greth->rx_bd_base + greth->rx_cur; | |
850 | skb = greth->rx_skbuff[greth->rx_cur]; | |
851 | status = greth_read_bd(&bdp->stat); | |
852 | bad = 0; | |
853 | ||
854 | if (status & GRETH_BD_EN) | |
855 | break; | |
856 | ||
857 | /* Check status for errors. */ | |
858 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
859 | ||
860 | if (status & GRETH_RXBD_ERR_FT) { | |
861 | dev->stats.rx_length_errors++; | |
862 | bad = 1; | |
863 | } else if (status & | |
864 | (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE | GRETH_RXBD_ERR_LE)) { | |
865 | dev->stats.rx_frame_errors++; | |
866 | bad = 1; | |
867 | } else if (status & GRETH_RXBD_ERR_CRC) { | |
868 | dev->stats.rx_crc_errors++; | |
869 | bad = 1; | |
870 | } | |
871 | } | |
872 | ||
873 | /* Allocate new skb to replace current */ | |
874 | newskb = netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN); | |
875 | ||
876 | if (!bad && newskb) { | |
877 | skb_reserve(newskb, NET_IP_ALIGN); | |
878 | ||
879 | dma_addr = dma_map_single(greth->dev, | |
880 | newskb->data, | |
881 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
882 | DMA_FROM_DEVICE); | |
883 | ||
884 | if (!dma_mapping_error(greth->dev, dma_addr)) { | |
885 | /* Process the incoming frame. */ | |
886 | pkt_len = status & GRETH_BD_LEN; | |
887 | ||
888 | dma_unmap_single(greth->dev, | |
889 | greth_read_bd(&bdp->addr), | |
890 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
891 | DMA_FROM_DEVICE); | |
892 | ||
893 | if (netif_msg_pktdata(greth)) | |
894 | greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp->addr)), pkt_len); | |
895 | ||
896 | skb_put(skb, pkt_len); | |
897 | ||
898 | if (greth->flags & GRETH_FLAG_RX_CSUM && hw_checksummed(status)) | |
899 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
900 | else | |
bc8acf2c | 901 | skb_checksum_none_assert(skb); |
d4c41139 | 902 | |
d4c41139 KG |
903 | skb->protocol = eth_type_trans(skb, dev); |
904 | dev->stats.rx_packets++; | |
905 | netif_receive_skb(skb); | |
906 | ||
907 | greth->rx_skbuff[greth->rx_cur] = newskb; | |
908 | greth_write_bd(&bdp->addr, dma_addr); | |
909 | } else { | |
910 | if (net_ratelimit()) | |
911 | dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n"); | |
912 | dev_kfree_skb(newskb); | |
913 | dev->stats.rx_dropped++; | |
914 | } | |
915 | } else { | |
916 | if (net_ratelimit()) | |
917 | dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n"); | |
918 | dev->stats.rx_dropped++; | |
919 | } | |
920 | ||
921 | status = GRETH_BD_EN | GRETH_BD_IE; | |
922 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
923 | status |= GRETH_BD_WR; | |
924 | } | |
925 | ||
926 | wmb(); | |
927 | greth_write_bd(&bdp->stat, status); | |
928 | greth_enable_rx(greth); | |
929 | greth->rx_cur = NEXT_RX(greth->rx_cur); | |
930 | } | |
931 | ||
932 | return count; | |
933 | ||
934 | } | |
935 | ||
936 | static int greth_poll(struct napi_struct *napi, int budget) | |
937 | { | |
938 | struct greth_private *greth; | |
939 | int work_done = 0; | |
940 | greth = container_of(napi, struct greth_private, napi); | |
941 | ||
942 | if (greth->gbit_mac) { | |
943 | greth_clean_tx_gbit(greth->netdev); | |
944 | } else { | |
945 | greth_clean_tx(greth->netdev); | |
946 | } | |
947 | ||
948 | restart_poll: | |
949 | if (greth->gbit_mac) { | |
950 | work_done += greth_rx_gbit(greth->netdev, budget - work_done); | |
951 | } else { | |
952 | work_done += greth_rx(greth->netdev, budget - work_done); | |
953 | } | |
954 | ||
955 | if (work_done < budget) { | |
956 | ||
957 | napi_complete(napi); | |
958 | ||
959 | if (greth_pending_packets(greth)) { | |
960 | napi_reschedule(napi); | |
961 | goto restart_poll; | |
962 | } | |
963 | } | |
964 | ||
965 | greth_enable_irqs(greth); | |
966 | return work_done; | |
967 | } | |
968 | ||
969 | static int greth_set_mac_add(struct net_device *dev, void *p) | |
970 | { | |
971 | struct sockaddr *addr = p; | |
972 | struct greth_private *greth; | |
973 | struct greth_regs *regs; | |
974 | ||
6e03718c | 975 | greth = netdev_priv(dev); |
d4c41139 KG |
976 | regs = (struct greth_regs *) greth->regs; |
977 | ||
978 | if (!is_valid_ether_addr(addr->sa_data)) | |
979 | return -EINVAL; | |
980 | ||
981 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
982 | ||
983 | GRETH_REGSAVE(regs->esa_msb, addr->sa_data[0] << 8 | addr->sa_data[1]); | |
984 | GRETH_REGSAVE(regs->esa_lsb, | |
985 | addr->sa_data[2] << 24 | addr-> | |
986 | sa_data[3] << 16 | addr->sa_data[4] << 8 | addr->sa_data[5]); | |
987 | return 0; | |
988 | } | |
989 | ||
990 | static u32 greth_hash_get_index(__u8 *addr) | |
991 | { | |
992 | return (ether_crc(6, addr)) & 0x3F; | |
993 | } | |
994 | ||
995 | static void greth_set_hash_filter(struct net_device *dev) | |
996 | { | |
22bedad3 | 997 | struct netdev_hw_addr *ha; |
6e03718c | 998 | struct greth_private *greth = netdev_priv(dev); |
d4c41139 KG |
999 | struct greth_regs *regs = (struct greth_regs *) greth->regs; |
1000 | u32 mc_filter[2]; | |
6e03718c | 1001 | unsigned int bitnr; |
d4c41139 KG |
1002 | |
1003 | mc_filter[0] = mc_filter[1] = 0; | |
1004 | ||
22bedad3 JP |
1005 | netdev_for_each_mc_addr(ha, dev) { |
1006 | bitnr = greth_hash_get_index(ha->addr); | |
d4c41139 KG |
1007 | mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); |
1008 | } | |
1009 | ||
1010 | GRETH_REGSAVE(regs->hash_msb, mc_filter[1]); | |
1011 | GRETH_REGSAVE(regs->hash_lsb, mc_filter[0]); | |
1012 | } | |
1013 | ||
1014 | static void greth_set_multicast_list(struct net_device *dev) | |
1015 | { | |
1016 | int cfg; | |
1017 | struct greth_private *greth = netdev_priv(dev); | |
1018 | struct greth_regs *regs = (struct greth_regs *) greth->regs; | |
1019 | ||
1020 | cfg = GRETH_REGLOAD(regs->control); | |
1021 | if (dev->flags & IFF_PROMISC) | |
1022 | cfg |= GRETH_CTRL_PR; | |
1023 | else | |
1024 | cfg &= ~GRETH_CTRL_PR; | |
1025 | ||
1026 | if (greth->multicast) { | |
1027 | if (dev->flags & IFF_ALLMULTI) { | |
1028 | GRETH_REGSAVE(regs->hash_msb, -1); | |
1029 | GRETH_REGSAVE(regs->hash_lsb, -1); | |
1030 | cfg |= GRETH_CTRL_MCEN; | |
1031 | GRETH_REGSAVE(regs->control, cfg); | |
1032 | return; | |
1033 | } | |
1034 | ||
6e03718c | 1035 | if (netdev_mc_empty(dev)) { |
d4c41139 KG |
1036 | cfg &= ~GRETH_CTRL_MCEN; |
1037 | GRETH_REGSAVE(regs->control, cfg); | |
1038 | return; | |
1039 | } | |
1040 | ||
1041 | /* Setup multicast filter */ | |
1042 | greth_set_hash_filter(dev); | |
1043 | cfg |= GRETH_CTRL_MCEN; | |
1044 | } | |
1045 | GRETH_REGSAVE(regs->control, cfg); | |
1046 | } | |
1047 | ||
1048 | static u32 greth_get_msglevel(struct net_device *dev) | |
1049 | { | |
1050 | struct greth_private *greth = netdev_priv(dev); | |
1051 | return greth->msg_enable; | |
1052 | } | |
1053 | ||
1054 | static void greth_set_msglevel(struct net_device *dev, u32 value) | |
1055 | { | |
1056 | struct greth_private *greth = netdev_priv(dev); | |
1057 | greth->msg_enable = value; | |
1058 | } | |
1059 | static int greth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1060 | { | |
1061 | struct greth_private *greth = netdev_priv(dev); | |
1062 | struct phy_device *phy = greth->phy; | |
1063 | ||
1064 | if (!phy) | |
1065 | return -ENODEV; | |
1066 | ||
1067 | return phy_ethtool_gset(phy, cmd); | |
1068 | } | |
1069 | ||
1070 | static int greth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1071 | { | |
1072 | struct greth_private *greth = netdev_priv(dev); | |
1073 | struct phy_device *phy = greth->phy; | |
1074 | ||
1075 | if (!phy) | |
1076 | return -ENODEV; | |
1077 | ||
1078 | return phy_ethtool_sset(phy, cmd); | |
1079 | } | |
1080 | ||
1081 | static int greth_get_regs_len(struct net_device *dev) | |
1082 | { | |
1083 | return sizeof(struct greth_regs); | |
1084 | } | |
1085 | ||
1086 | static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1087 | { | |
1088 | struct greth_private *greth = netdev_priv(dev); | |
1089 | ||
1090 | strncpy(info->driver, dev_driver_string(greth->dev), 32); | |
1091 | strncpy(info->version, "revision: 1.0", 32); | |
1092 | strncpy(info->bus_info, greth->dev->bus->name, 32); | |
1093 | strncpy(info->fw_version, "N/A", 32); | |
1094 | info->eedump_len = 0; | |
1095 | info->regdump_len = sizeof(struct greth_regs); | |
1096 | } | |
1097 | ||
1098 | static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) | |
1099 | { | |
1100 | int i; | |
1101 | struct greth_private *greth = netdev_priv(dev); | |
1102 | u32 __iomem *greth_regs = (u32 __iomem *) greth->regs; | |
1103 | u32 *buff = p; | |
1104 | ||
1105 | for (i = 0; i < sizeof(struct greth_regs) / sizeof(u32); i++) | |
1106 | buff[i] = greth_read_bd(&greth_regs[i]); | |
1107 | } | |
1108 | ||
1109 | static u32 greth_get_rx_csum(struct net_device *dev) | |
1110 | { | |
1111 | struct greth_private *greth = netdev_priv(dev); | |
1112 | return (greth->flags & GRETH_FLAG_RX_CSUM) != 0; | |
1113 | } | |
1114 | ||
1115 | static int greth_set_rx_csum(struct net_device *dev, u32 data) | |
1116 | { | |
1117 | struct greth_private *greth = netdev_priv(dev); | |
1118 | ||
1119 | spin_lock_bh(&greth->devlock); | |
1120 | ||
1121 | if (data) | |
1122 | greth->flags |= GRETH_FLAG_RX_CSUM; | |
1123 | else | |
1124 | greth->flags &= ~GRETH_FLAG_RX_CSUM; | |
1125 | ||
1126 | spin_unlock_bh(&greth->devlock); | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static u32 greth_get_tx_csum(struct net_device *dev) | |
1132 | { | |
1133 | return (dev->features & NETIF_F_IP_CSUM) != 0; | |
1134 | } | |
1135 | ||
1136 | static int greth_set_tx_csum(struct net_device *dev, u32 data) | |
1137 | { | |
1138 | netif_tx_lock_bh(dev); | |
1139 | ethtool_op_set_tx_csum(dev, data); | |
1140 | netif_tx_unlock_bh(dev); | |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | static const struct ethtool_ops greth_ethtool_ops = { | |
1145 | .get_msglevel = greth_get_msglevel, | |
1146 | .set_msglevel = greth_set_msglevel, | |
1147 | .get_settings = greth_get_settings, | |
1148 | .set_settings = greth_set_settings, | |
1149 | .get_drvinfo = greth_get_drvinfo, | |
1150 | .get_regs_len = greth_get_regs_len, | |
1151 | .get_regs = greth_get_regs, | |
1152 | .get_rx_csum = greth_get_rx_csum, | |
1153 | .set_rx_csum = greth_set_rx_csum, | |
1154 | .get_tx_csum = greth_get_tx_csum, | |
1155 | .set_tx_csum = greth_set_tx_csum, | |
1156 | .get_link = ethtool_op_get_link, | |
1157 | }; | |
1158 | ||
1159 | static struct net_device_ops greth_netdev_ops = { | |
1160 | .ndo_open = greth_open, | |
1161 | .ndo_stop = greth_close, | |
1162 | .ndo_start_xmit = greth_start_xmit, | |
1163 | .ndo_set_mac_address = greth_set_mac_add, | |
6e03718c | 1164 | .ndo_validate_addr = eth_validate_addr, |
d4c41139 KG |
1165 | }; |
1166 | ||
1167 | static inline int wait_for_mdio(struct greth_private *greth) | |
1168 | { | |
1169 | unsigned long timeout = jiffies + 4*HZ/100; | |
1170 | while (GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_BUSY) { | |
1171 | if (time_after(jiffies, timeout)) | |
1172 | return 0; | |
1173 | } | |
1174 | return 1; | |
1175 | } | |
1176 | ||
1177 | static int greth_mdio_read(struct mii_bus *bus, int phy, int reg) | |
1178 | { | |
1179 | struct greth_private *greth = bus->priv; | |
1180 | int data; | |
1181 | ||
1182 | if (!wait_for_mdio(greth)) | |
1183 | return -EBUSY; | |
1184 | ||
1185 | GRETH_REGSAVE(greth->regs->mdio, ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 2); | |
1186 | ||
1187 | if (!wait_for_mdio(greth)) | |
1188 | return -EBUSY; | |
1189 | ||
1190 | if (!(GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_NVALID)) { | |
1191 | data = (GRETH_REGLOAD(greth->regs->mdio) >> 16) & 0xFFFF; | |
1192 | return data; | |
1193 | ||
1194 | } else { | |
1195 | return -1; | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | static int greth_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) | |
1200 | { | |
1201 | struct greth_private *greth = bus->priv; | |
1202 | ||
1203 | if (!wait_for_mdio(greth)) | |
1204 | return -EBUSY; | |
1205 | ||
1206 | GRETH_REGSAVE(greth->regs->mdio, | |
1207 | ((val & 0xFFFF) << 16) | ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 1); | |
1208 | ||
1209 | if (!wait_for_mdio(greth)) | |
1210 | return -EBUSY; | |
1211 | ||
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | static int greth_mdio_reset(struct mii_bus *bus) | |
1216 | { | |
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | static void greth_link_change(struct net_device *dev) | |
1221 | { | |
1222 | struct greth_private *greth = netdev_priv(dev); | |
1223 | struct phy_device *phydev = greth->phy; | |
1224 | unsigned long flags; | |
1225 | ||
1226 | int status_change = 0; | |
1227 | ||
1228 | spin_lock_irqsave(&greth->devlock, flags); | |
1229 | ||
1230 | if (phydev->link) { | |
1231 | ||
1232 | if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) { | |
1233 | ||
1234 | GRETH_REGANDIN(greth->regs->control, | |
1235 | ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB)); | |
1236 | ||
1237 | if (phydev->duplex) | |
1238 | GRETH_REGORIN(greth->regs->control, GRETH_CTRL_FD); | |
1239 | ||
1240 | if (phydev->speed == SPEED_100) { | |
1241 | ||
1242 | GRETH_REGORIN(greth->regs->control, GRETH_CTRL_SP); | |
1243 | } | |
1244 | ||
1245 | else if (phydev->speed == SPEED_1000) | |
1246 | GRETH_REGORIN(greth->regs->control, GRETH_CTRL_GB); | |
1247 | ||
1248 | greth->speed = phydev->speed; | |
1249 | greth->duplex = phydev->duplex; | |
1250 | status_change = 1; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | if (phydev->link != greth->link) { | |
1255 | if (!phydev->link) { | |
1256 | greth->speed = 0; | |
1257 | greth->duplex = -1; | |
1258 | } | |
1259 | greth->link = phydev->link; | |
1260 | ||
1261 | status_change = 1; | |
1262 | } | |
1263 | ||
1264 | spin_unlock_irqrestore(&greth->devlock, flags); | |
1265 | ||
1266 | if (status_change) { | |
1267 | if (phydev->link) | |
1268 | pr_debug("%s: link up (%d/%s)\n", | |
1269 | dev->name, phydev->speed, | |
1270 | DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); | |
1271 | else | |
1272 | pr_debug("%s: link down\n", dev->name); | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | static int greth_mdio_probe(struct net_device *dev) | |
1277 | { | |
1278 | struct greth_private *greth = netdev_priv(dev); | |
1279 | struct phy_device *phy = NULL; | |
6e03718c | 1280 | int ret; |
d4c41139 KG |
1281 | |
1282 | /* Find the first PHY */ | |
6e03718c | 1283 | phy = phy_find_first(greth->mdio); |
1284 | ||
d4c41139 KG |
1285 | if (!phy) { |
1286 | if (netif_msg_probe(greth)) | |
1287 | dev_err(&dev->dev, "no PHY found\n"); | |
1288 | return -ENXIO; | |
1289 | } | |
1290 | ||
6e03718c | 1291 | ret = phy_connect_direct(dev, phy, &greth_link_change, |
1292 | 0, greth->gbit_mac ? | |
1293 | PHY_INTERFACE_MODE_GMII : | |
1294 | PHY_INTERFACE_MODE_MII); | |
1295 | if (ret) { | |
1296 | if (netif_msg_ifup(greth)) | |
1297 | dev_err(&dev->dev, "could not attach to PHY\n"); | |
1298 | return ret; | |
1299 | } | |
d4c41139 KG |
1300 | |
1301 | if (greth->gbit_mac) | |
1302 | phy->supported &= PHY_GBIT_FEATURES; | |
1303 | else | |
1304 | phy->supported &= PHY_BASIC_FEATURES; | |
1305 | ||
1306 | phy->advertising = phy->supported; | |
1307 | ||
d4c41139 KG |
1308 | greth->link = 0; |
1309 | greth->speed = 0; | |
1310 | greth->duplex = -1; | |
1311 | greth->phy = phy; | |
1312 | ||
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | static inline int phy_aneg_done(struct phy_device *phydev) | |
1317 | { | |
1318 | int retval; | |
1319 | ||
1320 | retval = phy_read(phydev, MII_BMSR); | |
1321 | ||
1322 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1323 | } | |
1324 | ||
1325 | static int greth_mdio_init(struct greth_private *greth) | |
1326 | { | |
1327 | int ret, phy; | |
1328 | unsigned long timeout; | |
1329 | ||
1330 | greth->mdio = mdiobus_alloc(); | |
1331 | if (!greth->mdio) { | |
1332 | return -ENOMEM; | |
1333 | } | |
1334 | ||
1335 | greth->mdio->name = "greth-mdio"; | |
1336 | snprintf(greth->mdio->id, MII_BUS_ID_SIZE, "%s-%d", greth->mdio->name, greth->irq); | |
1337 | greth->mdio->read = greth_mdio_read; | |
1338 | greth->mdio->write = greth_mdio_write; | |
1339 | greth->mdio->reset = greth_mdio_reset; | |
1340 | greth->mdio->priv = greth; | |
1341 | ||
1342 | greth->mdio->irq = greth->mdio_irqs; | |
1343 | ||
1344 | for (phy = 0; phy < PHY_MAX_ADDR; phy++) | |
1345 | greth->mdio->irq[phy] = PHY_POLL; | |
1346 | ||
1347 | ret = mdiobus_register(greth->mdio); | |
1348 | if (ret) { | |
1349 | goto error; | |
1350 | } | |
1351 | ||
1352 | ret = greth_mdio_probe(greth->netdev); | |
1353 | if (ret) { | |
1354 | if (netif_msg_probe(greth)) | |
1355 | dev_err(&greth->netdev->dev, "failed to probe MDIO bus\n"); | |
1356 | goto unreg_mdio; | |
1357 | } | |
1358 | ||
1359 | phy_start(greth->phy); | |
1360 | ||
1361 | /* If Ethernet debug link is used make autoneg happen right away */ | |
1362 | if (greth->edcl && greth_edcl == 1) { | |
1363 | phy_start_aneg(greth->phy); | |
1364 | timeout = jiffies + 6*HZ; | |
1365 | while (!phy_aneg_done(greth->phy) && time_before(jiffies, timeout)) { | |
1366 | } | |
1367 | genphy_read_status(greth->phy); | |
1368 | greth_link_change(greth->netdev); | |
1369 | } | |
1370 | ||
1371 | return 0; | |
1372 | ||
1373 | unreg_mdio: | |
1374 | mdiobus_unregister(greth->mdio); | |
1375 | error: | |
1376 | mdiobus_free(greth->mdio); | |
1377 | return ret; | |
1378 | } | |
1379 | ||
1380 | /* Initialize the GRETH MAC */ | |
2dc11581 | 1381 | static int __devinit greth_of_probe(struct platform_device *ofdev, const struct of_device_id *match) |
d4c41139 KG |
1382 | { |
1383 | struct net_device *dev; | |
1384 | struct greth_private *greth; | |
1385 | struct greth_regs *regs; | |
1386 | ||
1387 | int i; | |
1388 | int err; | |
1389 | int tmp; | |
1390 | unsigned long timeout; | |
1391 | ||
1392 | dev = alloc_etherdev(sizeof(struct greth_private)); | |
1393 | ||
1394 | if (dev == NULL) | |
1395 | return -ENOMEM; | |
1396 | ||
1397 | greth = netdev_priv(dev); | |
1398 | greth->netdev = dev; | |
1399 | greth->dev = &ofdev->dev; | |
1400 | ||
1401 | if (greth_debug > 0) | |
1402 | greth->msg_enable = greth_debug; | |
1403 | else | |
1404 | greth->msg_enable = GRETH_DEF_MSG_ENABLE; | |
1405 | ||
1406 | spin_lock_init(&greth->devlock); | |
1407 | ||
1408 | greth->regs = of_ioremap(&ofdev->resource[0], 0, | |
1409 | resource_size(&ofdev->resource[0]), | |
1410 | "grlib-greth regs"); | |
1411 | ||
1412 | if (greth->regs == NULL) { | |
1413 | if (netif_msg_probe(greth)) | |
1414 | dev_err(greth->dev, "ioremap failure.\n"); | |
1415 | err = -EIO; | |
1416 | goto error1; | |
1417 | } | |
1418 | ||
1419 | regs = (struct greth_regs *) greth->regs; | |
19e4875f | 1420 | greth->irq = ofdev->archdata.irqs[0]; |
d4c41139 KG |
1421 | |
1422 | dev_set_drvdata(greth->dev, dev); | |
1423 | SET_NETDEV_DEV(dev, greth->dev); | |
1424 | ||
1425 | if (netif_msg_probe(greth)) | |
1426 | dev_dbg(greth->dev, "reseting controller.\n"); | |
1427 | ||
1428 | /* Reset the controller. */ | |
1429 | GRETH_REGSAVE(regs->control, GRETH_RESET); | |
1430 | ||
1431 | /* Wait for MAC to reset itself */ | |
1432 | timeout = jiffies + HZ/100; | |
1433 | while (GRETH_REGLOAD(regs->control) & GRETH_RESET) { | |
1434 | if (time_after(jiffies, timeout)) { | |
1435 | err = -EIO; | |
1436 | if (netif_msg_probe(greth)) | |
1437 | dev_err(greth->dev, "timeout when waiting for reset.\n"); | |
1438 | goto error2; | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | /* Get default PHY address */ | |
1443 | greth->phyaddr = (GRETH_REGLOAD(regs->mdio) >> 11) & 0x1F; | |
1444 | ||
1445 | /* Check if we have GBIT capable MAC */ | |
1446 | tmp = GRETH_REGLOAD(regs->control); | |
1447 | greth->gbit_mac = (tmp >> 27) & 1; | |
1448 | ||
1449 | /* Check for multicast capability */ | |
1450 | greth->multicast = (tmp >> 25) & 1; | |
1451 | ||
1452 | greth->edcl = (tmp >> 31) & 1; | |
1453 | ||
1454 | /* If we have EDCL we disable the EDCL speed-duplex FSM so | |
1455 | * it doesn't interfere with the software */ | |
1456 | if (greth->edcl != 0) | |
1457 | GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX); | |
1458 | ||
1459 | /* Check if MAC can handle MDIO interrupts */ | |
1460 | greth->mdio_int_en = (tmp >> 26) & 1; | |
1461 | ||
1462 | err = greth_mdio_init(greth); | |
1463 | if (err) { | |
1464 | if (netif_msg_probe(greth)) | |
1465 | dev_err(greth->dev, "failed to register MDIO bus\n"); | |
1466 | goto error2; | |
1467 | } | |
1468 | ||
1469 | /* Allocate TX descriptor ring in coherent memory */ | |
1470 | greth->tx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev, | |
1471 | 1024, | |
1472 | &greth->tx_bd_base_phys, | |
1473 | GFP_KERNEL); | |
1474 | ||
1475 | if (!greth->tx_bd_base) { | |
1476 | if (netif_msg_probe(greth)) | |
1477 | dev_err(&dev->dev, "could not allocate descriptor memory.\n"); | |
1478 | err = -ENOMEM; | |
1479 | goto error3; | |
1480 | } | |
1481 | ||
1482 | memset(greth->tx_bd_base, 0, 1024); | |
1483 | ||
1484 | /* Allocate RX descriptor ring in coherent memory */ | |
1485 | greth->rx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev, | |
1486 | 1024, | |
1487 | &greth->rx_bd_base_phys, | |
1488 | GFP_KERNEL); | |
1489 | ||
1490 | if (!greth->rx_bd_base) { | |
1491 | if (netif_msg_probe(greth)) | |
1492 | dev_err(greth->dev, "could not allocate descriptor memory.\n"); | |
1493 | err = -ENOMEM; | |
1494 | goto error4; | |
1495 | } | |
1496 | ||
1497 | memset(greth->rx_bd_base, 0, 1024); | |
1498 | ||
1499 | /* Get MAC address from: module param, OF property or ID prom */ | |
1500 | for (i = 0; i < 6; i++) { | |
1501 | if (macaddr[i] != 0) | |
1502 | break; | |
1503 | } | |
1504 | if (i == 6) { | |
1505 | const unsigned char *addr; | |
1506 | int len; | |
61c7a080 GL |
1507 | addr = of_get_property(ofdev->dev.of_node, "local-mac-address", |
1508 | &len); | |
d4c41139 KG |
1509 | if (addr != NULL && len == 6) { |
1510 | for (i = 0; i < 6; i++) | |
1511 | macaddr[i] = (unsigned int) addr[i]; | |
1512 | } else { | |
1513 | #ifdef CONFIG_SPARC | |
1514 | for (i = 0; i < 6; i++) | |
1515 | macaddr[i] = (unsigned int) idprom->id_ethaddr[i]; | |
1516 | #endif | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | for (i = 0; i < 6; i++) | |
1521 | dev->dev_addr[i] = macaddr[i]; | |
1522 | ||
1523 | macaddr[5]++; | |
1524 | ||
1525 | if (!is_valid_ether_addr(&dev->dev_addr[0])) { | |
1526 | if (netif_msg_probe(greth)) | |
1527 | dev_err(greth->dev, "no valid ethernet address, aborting.\n"); | |
1528 | err = -EINVAL; | |
1529 | goto error5; | |
1530 | } | |
1531 | ||
1532 | GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); | |
1533 | GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | | |
1534 | dev->dev_addr[4] << 8 | dev->dev_addr[5]); | |
1535 | ||
1536 | /* Clear all pending interrupts except PHY irq */ | |
1537 | GRETH_REGSAVE(regs->status, 0xFF); | |
1538 | ||
1539 | if (greth->gbit_mac) { | |
1540 | dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_HIGHDMA; | |
1541 | greth_netdev_ops.ndo_start_xmit = greth_start_xmit_gbit; | |
1542 | greth->flags = GRETH_FLAG_RX_CSUM; | |
1543 | } | |
1544 | ||
1545 | if (greth->multicast) { | |
1546 | greth_netdev_ops.ndo_set_multicast_list = greth_set_multicast_list; | |
1547 | dev->flags |= IFF_MULTICAST; | |
1548 | } else { | |
1549 | dev->flags &= ~IFF_MULTICAST; | |
1550 | } | |
1551 | ||
1552 | dev->netdev_ops = &greth_netdev_ops; | |
1553 | dev->ethtool_ops = &greth_ethtool_ops; | |
1554 | ||
cb5d991a TK |
1555 | err = register_netdev(dev); |
1556 | if (err) { | |
d4c41139 KG |
1557 | if (netif_msg_probe(greth)) |
1558 | dev_err(greth->dev, "netdevice registration failed.\n"); | |
d4c41139 KG |
1559 | goto error5; |
1560 | } | |
1561 | ||
1562 | /* setup NAPI */ | |
d4c41139 KG |
1563 | netif_napi_add(dev, &greth->napi, greth_poll, 64); |
1564 | ||
1565 | return 0; | |
1566 | ||
1567 | error5: | |
1568 | dma_free_coherent(greth->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1569 | error4: | |
1570 | dma_free_coherent(greth->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1571 | error3: | |
1572 | mdiobus_unregister(greth->mdio); | |
1573 | error2: | |
1574 | of_iounmap(&ofdev->resource[0], greth->regs, resource_size(&ofdev->resource[0])); | |
1575 | error1: | |
1576 | free_netdev(dev); | |
1577 | return err; | |
1578 | } | |
1579 | ||
2dc11581 | 1580 | static int __devexit greth_of_remove(struct platform_device *of_dev) |
d4c41139 KG |
1581 | { |
1582 | struct net_device *ndev = dev_get_drvdata(&of_dev->dev); | |
1583 | struct greth_private *greth = netdev_priv(ndev); | |
1584 | ||
1585 | /* Free descriptor areas */ | |
1586 | dma_free_coherent(&of_dev->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1587 | ||
1588 | dma_free_coherent(&of_dev->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1589 | ||
1590 | dev_set_drvdata(&of_dev->dev, NULL); | |
1591 | ||
1592 | if (greth->phy) | |
1593 | phy_stop(greth->phy); | |
1594 | mdiobus_unregister(greth->mdio); | |
1595 | ||
1596 | unregister_netdev(ndev); | |
1597 | free_netdev(ndev); | |
1598 | ||
1599 | of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0])); | |
1600 | ||
1601 | return 0; | |
1602 | } | |
1603 | ||
1604 | static struct of_device_id greth_of_match[] = { | |
1605 | { | |
1606 | .name = "GAISLER_ETHMAC", | |
1607 | }, | |
ad4650a8 DH |
1608 | { |
1609 | .name = "01_01d", | |
1610 | }, | |
d4c41139 KG |
1611 | {}, |
1612 | }; | |
1613 | ||
1614 | MODULE_DEVICE_TABLE(of, greth_of_match); | |
1615 | ||
1616 | static struct of_platform_driver greth_of_driver = { | |
bc284f94 DM |
1617 | .driver = { |
1618 | .name = "grlib-greth", | |
1619 | .owner = THIS_MODULE, | |
1620 | .of_match_table = greth_of_match, | |
1621 | }, | |
d4c41139 KG |
1622 | .probe = greth_of_probe, |
1623 | .remove = __devexit_p(greth_of_remove), | |
d4c41139 KG |
1624 | }; |
1625 | ||
1626 | static int __init greth_init(void) | |
1627 | { | |
1628 | return of_register_platform_driver(&greth_of_driver); | |
1629 | } | |
1630 | ||
1631 | static void __exit greth_cleanup(void) | |
1632 | { | |
1633 | of_unregister_platform_driver(&greth_of_driver); | |
1634 | } | |
1635 | ||
1636 | module_init(greth_init); | |
1637 | module_exit(greth_cleanup); | |
1638 | ||
1639 | MODULE_AUTHOR("Aeroflex Gaisler AB."); | |
1640 | MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver"); | |
1641 | MODULE_LICENSE("GPL"); |