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d4c41139 KG |
1 | /* |
2 | * Aeroflex Gaisler GRETH 10/100/1G Ethernet MAC. | |
3 | * | |
0f73f2c5 | 4 | * 2005-2010 (c) Aeroflex Gaisler AB |
d4c41139 KG |
5 | * |
6 | * This driver supports GRETH 10/100 and GRETH 10/100/1G Ethernet MACs | |
7 | * available in the GRLIB VHDL IP core library. | |
8 | * | |
9 | * Full documentation of both cores can be found here: | |
10 | * http://www.gaisler.com/products/grlib/grip.pdf | |
11 | * | |
12 | * The Gigabit version supports scatter/gather DMA, any alignment of | |
13 | * buffers and checksum offloading. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2 of the License, or (at your | |
18 | * option) any later version. | |
19 | * | |
20 | * Contributors: Kristoffer Glembo | |
21 | * Daniel Hellstrom | |
22 | * Marko Isomaki | |
23 | */ | |
24 | ||
b7f080cf | 25 | #include <linux/dma-mapping.h> |
d4c41139 KG |
26 | #include <linux/module.h> |
27 | #include <linux/uaccess.h> | |
a6b7a407 | 28 | #include <linux/interrupt.h> |
d4c41139 KG |
29 | #include <linux/netdevice.h> |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/ethtool.h> | |
32 | #include <linux/skbuff.h> | |
33 | #include <linux/io.h> | |
34 | #include <linux/crc32.h> | |
35 | #include <linux/mii.h> | |
36 | #include <linux/of_device.h> | |
37 | #include <linux/of_platform.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
d4c41139 KG |
39 | #include <asm/cacheflush.h> |
40 | #include <asm/byteorder.h> | |
41 | ||
42 | #ifdef CONFIG_SPARC | |
43 | #include <asm/idprom.h> | |
44 | #endif | |
45 | ||
46 | #include "greth.h" | |
47 | ||
48 | #define GRETH_DEF_MSG_ENABLE \ | |
49 | (NETIF_MSG_DRV | \ | |
50 | NETIF_MSG_PROBE | \ | |
51 | NETIF_MSG_LINK | \ | |
52 | NETIF_MSG_IFDOWN | \ | |
53 | NETIF_MSG_IFUP | \ | |
54 | NETIF_MSG_RX_ERR | \ | |
55 | NETIF_MSG_TX_ERR) | |
56 | ||
57 | static int greth_debug = -1; /* -1 == use GRETH_DEF_MSG_ENABLE as value */ | |
58 | module_param(greth_debug, int, 0); | |
59 | MODULE_PARM_DESC(greth_debug, "GRETH bitmapped debugging message enable value"); | |
60 | ||
61 | /* Accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */ | |
62 | static int macaddr[6]; | |
63 | module_param_array(macaddr, int, NULL, 0); | |
64 | MODULE_PARM_DESC(macaddr, "GRETH Ethernet MAC address"); | |
65 | ||
66 | static int greth_edcl = 1; | |
67 | module_param(greth_edcl, int, 0); | |
68 | MODULE_PARM_DESC(greth_edcl, "GRETH EDCL usage indicator. Set to 1 if EDCL is used."); | |
69 | ||
70 | static int greth_open(struct net_device *dev); | |
41a655ba | 71 | static netdev_tx_t greth_start_xmit(struct sk_buff *skb, |
72 | struct net_device *dev); | |
73 | static netdev_tx_t greth_start_xmit_gbit(struct sk_buff *skb, | |
74 | struct net_device *dev); | |
d4c41139 KG |
75 | static int greth_rx(struct net_device *dev, int limit); |
76 | static int greth_rx_gbit(struct net_device *dev, int limit); | |
77 | static void greth_clean_tx(struct net_device *dev); | |
78 | static void greth_clean_tx_gbit(struct net_device *dev); | |
79 | static irqreturn_t greth_interrupt(int irq, void *dev_id); | |
80 | static int greth_close(struct net_device *dev); | |
81 | static int greth_set_mac_add(struct net_device *dev, void *p); | |
82 | static void greth_set_multicast_list(struct net_device *dev); | |
83 | ||
84 | #define GRETH_REGLOAD(a) (be32_to_cpu(__raw_readl(&(a)))) | |
85 | #define GRETH_REGSAVE(a, v) (__raw_writel(cpu_to_be32(v), &(a))) | |
86 | #define GRETH_REGORIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v)))) | |
87 | #define GRETH_REGANDIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v)))) | |
88 | ||
89 | #define NEXT_TX(N) (((N) + 1) & GRETH_TXBD_NUM_MASK) | |
90 | #define SKIP_TX(N, C) (((N) + C) & GRETH_TXBD_NUM_MASK) | |
91 | #define NEXT_RX(N) (((N) + 1) & GRETH_RXBD_NUM_MASK) | |
92 | ||
93 | static void greth_print_rx_packet(void *addr, int len) | |
94 | { | |
95 | print_hex_dump(KERN_DEBUG, "RX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
96 | addr, len, true); | |
97 | } | |
98 | ||
99 | static void greth_print_tx_packet(struct sk_buff *skb) | |
100 | { | |
101 | int i; | |
102 | int length; | |
103 | ||
104 | if (skb_shinfo(skb)->nr_frags == 0) | |
105 | length = skb->len; | |
106 | else | |
107 | length = skb_headlen(skb); | |
108 | ||
109 | print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
110 | skb->data, length, true); | |
111 | ||
112 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
113 | ||
114 | print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, | |
ab7e11d9 IC |
115 | skb_frag_address(&skb_shinfo(skb)->frags[i]), |
116 | skb_shinfo(skb)->frags[i].size, true); | |
d4c41139 KG |
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 | ||
e1743a16 DH |
126 | static inline void greth_enable_tx_and_irq(struct greth_private *greth) |
127 | { | |
128 | wmb(); /* BDs must been written to memory before enabling TX */ | |
129 | GRETH_REGORIN(greth->regs->control, GRETH_TXEN | GRETH_TXI); | |
130 | } | |
131 | ||
d4c41139 KG |
132 | static inline void greth_disable_tx(struct greth_private *greth) |
133 | { | |
134 | GRETH_REGANDIN(greth->regs->control, ~GRETH_TXEN); | |
135 | } | |
136 | ||
137 | static inline void greth_enable_rx(struct greth_private *greth) | |
138 | { | |
139 | wmb(); | |
140 | GRETH_REGORIN(greth->regs->control, GRETH_RXEN); | |
141 | } | |
142 | ||
143 | static inline void greth_disable_rx(struct greth_private *greth) | |
144 | { | |
145 | GRETH_REGANDIN(greth->regs->control, ~GRETH_RXEN); | |
146 | } | |
147 | ||
148 | static inline void greth_enable_irqs(struct greth_private *greth) | |
149 | { | |
150 | GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI); | |
151 | } | |
152 | ||
153 | static inline void greth_disable_irqs(struct greth_private *greth) | |
154 | { | |
155 | GRETH_REGANDIN(greth->regs->control, ~(GRETH_RXI|GRETH_TXI)); | |
156 | } | |
157 | ||
158 | static inline void greth_write_bd(u32 *bd, u32 val) | |
159 | { | |
160 | __raw_writel(cpu_to_be32(val), bd); | |
161 | } | |
162 | ||
163 | static inline u32 greth_read_bd(u32 *bd) | |
164 | { | |
165 | return be32_to_cpu(__raw_readl(bd)); | |
166 | } | |
167 | ||
168 | static void greth_clean_rings(struct greth_private *greth) | |
169 | { | |
170 | int i; | |
171 | struct greth_bd *rx_bdp = greth->rx_bd_base; | |
172 | struct greth_bd *tx_bdp = greth->tx_bd_base; | |
173 | ||
174 | if (greth->gbit_mac) { | |
175 | ||
176 | /* Free and unmap RX buffers */ | |
177 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
178 | if (greth->rx_skbuff[i] != NULL) { | |
179 | dev_kfree_skb(greth->rx_skbuff[i]); | |
180 | dma_unmap_single(greth->dev, | |
181 | greth_read_bd(&rx_bdp->addr), | |
182 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
183 | DMA_FROM_DEVICE); | |
184 | } | |
185 | } | |
186 | ||
187 | /* TX buffers */ | |
188 | while (greth->tx_free < GRETH_TXBD_NUM) { | |
189 | ||
190 | struct sk_buff *skb = greth->tx_skbuff[greth->tx_last]; | |
191 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
192 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
193 | greth->tx_last = NEXT_TX(greth->tx_last); | |
194 | ||
195 | dma_unmap_single(greth->dev, | |
196 | greth_read_bd(&tx_bdp->addr), | |
197 | skb_headlen(skb), | |
198 | DMA_TO_DEVICE); | |
199 | ||
200 | for (i = 0; i < nr_frags; i++) { | |
201 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
202 | tx_bdp = greth->tx_bd_base + greth->tx_last; | |
203 | ||
204 | dma_unmap_page(greth->dev, | |
205 | greth_read_bd(&tx_bdp->addr), | |
9e903e08 | 206 | skb_frag_size(frag), |
d4c41139 KG |
207 | DMA_TO_DEVICE); |
208 | ||
209 | greth->tx_last = NEXT_TX(greth->tx_last); | |
210 | } | |
211 | greth->tx_free += nr_frags+1; | |
212 | dev_kfree_skb(skb); | |
213 | } | |
214 | ||
215 | ||
216 | } else { /* 10/100 Mbps MAC */ | |
217 | ||
218 | for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { | |
219 | kfree(greth->rx_bufs[i]); | |
220 | dma_unmap_single(greth->dev, | |
221 | greth_read_bd(&rx_bdp->addr), | |
222 | MAX_FRAME_SIZE, | |
223 | DMA_FROM_DEVICE); | |
224 | } | |
225 | for (i = 0; i < GRETH_TXBD_NUM; i++, tx_bdp++) { | |
226 | kfree(greth->tx_bufs[i]); | |
227 | dma_unmap_single(greth->dev, | |
228 | greth_read_bd(&tx_bdp->addr), | |
229 | MAX_FRAME_SIZE, | |
230 | DMA_TO_DEVICE); | |
231 | } | |
232 | } | |
233 | } | |
234 | ||
235 | static int greth_init_rings(struct greth_private *greth) | |
236 | { | |
237 | struct sk_buff *skb; | |
238 | struct greth_bd *rx_bd, *tx_bd; | |
239 | u32 dma_addr; | |
240 | int i; | |
241 | ||
242 | rx_bd = greth->rx_bd_base; | |
243 | tx_bd = greth->tx_bd_base; | |
244 | ||
245 | /* Initialize descriptor rings and buffers */ | |
246 | if (greth->gbit_mac) { | |
247 | ||
248 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
249 | skb = netdev_alloc_skb(greth->netdev, MAX_FRAME_SIZE+NET_IP_ALIGN); | |
250 | if (skb == NULL) { | |
251 | if (netif_msg_ifup(greth)) | |
252 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
253 | goto cleanup; | |
254 | } | |
255 | skb_reserve(skb, NET_IP_ALIGN); | |
256 | dma_addr = dma_map_single(greth->dev, | |
257 | skb->data, | |
258 | MAX_FRAME_SIZE+NET_IP_ALIGN, | |
259 | DMA_FROM_DEVICE); | |
260 | ||
261 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
262 | if (netif_msg_ifup(greth)) | |
263 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
264 | goto cleanup; | |
265 | } | |
266 | greth->rx_skbuff[i] = skb; | |
267 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
268 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
269 | } | |
270 | ||
271 | } else { | |
272 | ||
273 | /* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */ | |
274 | for (i = 0; i < GRETH_RXBD_NUM; i++) { | |
275 | ||
276 | greth->rx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
277 | ||
278 | if (greth->rx_bufs[i] == NULL) { | |
279 | if (netif_msg_ifup(greth)) | |
280 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
281 | goto cleanup; | |
282 | } | |
283 | ||
284 | dma_addr = dma_map_single(greth->dev, | |
285 | greth->rx_bufs[i], | |
286 | MAX_FRAME_SIZE, | |
287 | DMA_FROM_DEVICE); | |
288 | ||
289 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
290 | if (netif_msg_ifup(greth)) | |
291 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
292 | goto cleanup; | |
293 | } | |
294 | greth_write_bd(&rx_bd[i].addr, dma_addr); | |
295 | greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); | |
296 | } | |
297 | for (i = 0; i < GRETH_TXBD_NUM; i++) { | |
298 | ||
299 | greth->tx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); | |
300 | ||
301 | if (greth->tx_bufs[i] == NULL) { | |
302 | if (netif_msg_ifup(greth)) | |
303 | dev_err(greth->dev, "Error allocating DMA ring.\n"); | |
304 | goto cleanup; | |
305 | } | |
306 | ||
307 | dma_addr = dma_map_single(greth->dev, | |
308 | greth->tx_bufs[i], | |
309 | MAX_FRAME_SIZE, | |
310 | DMA_TO_DEVICE); | |
311 | ||
312 | if (dma_mapping_error(greth->dev, dma_addr)) { | |
313 | if (netif_msg_ifup(greth)) | |
314 | dev_err(greth->dev, "Could not create initial DMA mapping\n"); | |
315 | goto cleanup; | |
316 | } | |
317 | greth_write_bd(&tx_bd[i].addr, dma_addr); | |
318 | greth_write_bd(&tx_bd[i].stat, 0); | |
319 | } | |
320 | } | |
321 | greth_write_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat, | |
322 | greth_read_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat) | GRETH_BD_WR); | |
323 | ||
324 | /* Initialize pointers. */ | |
325 | greth->rx_cur = 0; | |
326 | greth->tx_next = 0; | |
327 | greth->tx_last = 0; | |
328 | greth->tx_free = GRETH_TXBD_NUM; | |
329 | ||
330 | /* Initialize descriptor base address */ | |
331 | GRETH_REGSAVE(greth->regs->tx_desc_p, greth->tx_bd_base_phys); | |
332 | GRETH_REGSAVE(greth->regs->rx_desc_p, greth->rx_bd_base_phys); | |
333 | ||
334 | return 0; | |
335 | ||
336 | cleanup: | |
337 | greth_clean_rings(greth); | |
338 | return -ENOMEM; | |
339 | } | |
340 | ||
341 | static int greth_open(struct net_device *dev) | |
342 | { | |
343 | struct greth_private *greth = netdev_priv(dev); | |
344 | int err; | |
345 | ||
346 | err = greth_init_rings(greth); | |
347 | if (err) { | |
348 | if (netif_msg_ifup(greth)) | |
349 | dev_err(&dev->dev, "Could not allocate memory for DMA rings\n"); | |
350 | return err; | |
351 | } | |
352 | ||
353 | err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev); | |
354 | if (err) { | |
355 | if (netif_msg_ifup(greth)) | |
356 | dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq); | |
357 | greth_clean_rings(greth); | |
358 | return err; | |
359 | } | |
360 | ||
361 | if (netif_msg_ifup(greth)) | |
362 | dev_dbg(&dev->dev, " starting queue\n"); | |
363 | netif_start_queue(dev); | |
364 | ||
bbe9e637 DH |
365 | GRETH_REGSAVE(greth->regs->status, 0xFF); |
366 | ||
d4c41139 KG |
367 | napi_enable(&greth->napi); |
368 | ||
369 | greth_enable_irqs(greth); | |
370 | greth_enable_tx(greth); | |
371 | greth_enable_rx(greth); | |
372 | return 0; | |
373 | ||
374 | } | |
375 | ||
376 | static int greth_close(struct net_device *dev) | |
377 | { | |
378 | struct greth_private *greth = netdev_priv(dev); | |
379 | ||
380 | napi_disable(&greth->napi); | |
381 | ||
bbe9e637 | 382 | greth_disable_irqs(greth); |
d4c41139 | 383 | greth_disable_tx(greth); |
bbe9e637 | 384 | greth_disable_rx(greth); |
d4c41139 KG |
385 | |
386 | netif_stop_queue(dev); | |
387 | ||
388 | free_irq(greth->irq, (void *) dev); | |
389 | ||
390 | greth_clean_rings(greth); | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
41a655ba | 395 | static netdev_tx_t |
396 | greth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
d4c41139 KG |
397 | { |
398 | struct greth_private *greth = netdev_priv(dev); | |
399 | struct greth_bd *bdp; | |
400 | int err = NETDEV_TX_OK; | |
0f73f2c5 DH |
401 | u32 status, dma_addr, ctrl; |
402 | unsigned long flags; | |
d4c41139 | 403 | |
0f73f2c5 DH |
404 | /* Clean TX Ring */ |
405 | greth_clean_tx(greth->netdev); | |
d4c41139 KG |
406 | |
407 | if (unlikely(greth->tx_free <= 0)) { | |
0f73f2c5 DH |
408 | spin_lock_irqsave(&greth->devlock, flags);/*save from poll/irq*/ |
409 | ctrl = GRETH_REGLOAD(greth->regs->control); | |
410 | /* Enable TX IRQ only if not already in poll() routine */ | |
411 | if (ctrl & GRETH_RXI) | |
412 | GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI); | |
d4c41139 | 413 | netif_stop_queue(dev); |
0f73f2c5 | 414 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
415 | return NETDEV_TX_BUSY; |
416 | } | |
417 | ||
418 | if (netif_msg_pktdata(greth)) | |
419 | greth_print_tx_packet(skb); | |
420 | ||
421 | ||
422 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
423 | dev->stats.tx_errors++; | |
424 | goto out; | |
425 | } | |
426 | ||
0f73f2c5 | 427 | bdp = greth->tx_bd_base + greth->tx_next; |
d4c41139 KG |
428 | dma_addr = greth_read_bd(&bdp->addr); |
429 | ||
430 | memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len); | |
431 | ||
432 | dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE); | |
433 | ||
0f73f2c5 | 434 | status = GRETH_BD_EN | GRETH_BD_IE | (skb->len & GRETH_BD_LEN); |
6af29a96 | 435 | greth->tx_bufs_length[greth->tx_next] = skb->len & GRETH_BD_LEN; |
d4c41139 KG |
436 | |
437 | /* Wrap around descriptor ring */ | |
438 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) { | |
439 | status |= GRETH_BD_WR; | |
440 | } | |
441 | ||
442 | greth->tx_next = NEXT_TX(greth->tx_next); | |
443 | greth->tx_free--; | |
444 | ||
d4c41139 KG |
445 | /* Write descriptor control word and enable transmission */ |
446 | greth_write_bd(&bdp->stat, status); | |
0f73f2c5 | 447 | spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/ |
d4c41139 | 448 | greth_enable_tx(greth); |
0f73f2c5 | 449 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
450 | |
451 | out: | |
452 | dev_kfree_skb(skb); | |
453 | return err; | |
454 | } | |
455 | ||
e1743a16 DH |
456 | static inline u16 greth_num_free_bds(u16 tx_last, u16 tx_next) |
457 | { | |
458 | if (tx_next < tx_last) | |
459 | return (tx_last - tx_next) - 1; | |
460 | else | |
461 | return GRETH_TXBD_NUM - (tx_next - tx_last) - 1; | |
462 | } | |
d4c41139 | 463 | |
41a655ba | 464 | static netdev_tx_t |
465 | greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) | |
d4c41139 KG |
466 | { |
467 | struct greth_private *greth = netdev_priv(dev); | |
468 | struct greth_bd *bdp; | |
e1743a16 | 469 | u32 status, dma_addr; |
d4c41139 | 470 | int curr_tx, nr_frags, i, err = NETDEV_TX_OK; |
0f73f2c5 | 471 | unsigned long flags; |
e1743a16 | 472 | u16 tx_last; |
d4c41139 KG |
473 | |
474 | nr_frags = skb_shinfo(skb)->nr_frags; | |
e1743a16 DH |
475 | tx_last = greth->tx_last; |
476 | rmb(); /* tx_last is updated by the poll task */ | |
d4c41139 | 477 | |
e1743a16 | 478 | if (greth_num_free_bds(tx_last, greth->tx_next) < nr_frags + 1) { |
d4c41139 KG |
479 | netif_stop_queue(dev); |
480 | err = NETDEV_TX_BUSY; | |
481 | goto out; | |
482 | } | |
483 | ||
484 | if (netif_msg_pktdata(greth)) | |
485 | greth_print_tx_packet(skb); | |
486 | ||
487 | if (unlikely(skb->len > MAX_FRAME_SIZE)) { | |
488 | dev->stats.tx_errors++; | |
489 | goto out; | |
490 | } | |
491 | ||
492 | /* Save skb pointer. */ | |
493 | greth->tx_skbuff[greth->tx_next] = skb; | |
494 | ||
495 | /* Linear buf */ | |
496 | if (nr_frags != 0) | |
497 | status = GRETH_TXBD_MORE; | |
e1743a16 DH |
498 | else |
499 | status = GRETH_BD_IE; | |
d4c41139 | 500 | |
d706f00f DH |
501 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
502 | status |= GRETH_TXBD_CSALL; | |
d4c41139 KG |
503 | status |= skb_headlen(skb) & GRETH_BD_LEN; |
504 | if (greth->tx_next == GRETH_TXBD_NUM_MASK) | |
505 | status |= GRETH_BD_WR; | |
506 | ||
507 | ||
508 | bdp = greth->tx_bd_base + greth->tx_next; | |
509 | greth_write_bd(&bdp->stat, status); | |
510 | dma_addr = dma_map_single(greth->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); | |
511 | ||
512 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
513 | goto map_error; | |
514 | ||
515 | greth_write_bd(&bdp->addr, dma_addr); | |
516 | ||
517 | curr_tx = NEXT_TX(greth->tx_next); | |
518 | ||
519 | /* Frags */ | |
520 | for (i = 0; i < nr_frags; i++) { | |
521 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
522 | greth->tx_skbuff[curr_tx] = NULL; | |
523 | bdp = greth->tx_bd_base + curr_tx; | |
524 | ||
d706f00f DH |
525 | status = GRETH_BD_EN; |
526 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
527 | status |= GRETH_TXBD_CSALL; | |
9e903e08 | 528 | status |= skb_frag_size(frag) & GRETH_BD_LEN; |
d4c41139 KG |
529 | |
530 | /* Wrap around descriptor ring */ | |
531 | if (curr_tx == GRETH_TXBD_NUM_MASK) | |
532 | status |= GRETH_BD_WR; | |
533 | ||
534 | /* More fragments left */ | |
535 | if (i < nr_frags - 1) | |
536 | status |= GRETH_TXBD_MORE; | |
0f73f2c5 DH |
537 | else |
538 | status |= GRETH_BD_IE; /* enable IRQ on last fragment */ | |
d4c41139 KG |
539 | |
540 | greth_write_bd(&bdp->stat, status); | |
541 | ||
9e903e08 | 542 | dma_addr = skb_frag_dma_map(greth->dev, frag, 0, skb_frag_size(frag), |
ab7e11d9 | 543 | DMA_TO_DEVICE); |
d4c41139 KG |
544 | |
545 | if (unlikely(dma_mapping_error(greth->dev, dma_addr))) | |
546 | goto frag_map_error; | |
547 | ||
548 | greth_write_bd(&bdp->addr, dma_addr); | |
549 | ||
550 | curr_tx = NEXT_TX(curr_tx); | |
551 | } | |
552 | ||
553 | wmb(); | |
554 | ||
2a2bc012 DH |
555 | /* Enable the descriptor chain by enabling the first descriptor */ |
556 | bdp = greth->tx_bd_base + greth->tx_next; | |
e1743a16 DH |
557 | greth_write_bd(&bdp->stat, |
558 | greth_read_bd(&bdp->stat) | GRETH_BD_EN); | |
d4c41139 | 559 | |
0f73f2c5 | 560 | spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/ |
e1743a16 DH |
561 | greth->tx_next = curr_tx; |
562 | greth_enable_tx_and_irq(greth); | |
0f73f2c5 | 563 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
564 | |
565 | return NETDEV_TX_OK; | |
566 | ||
567 | frag_map_error: | |
2a2bc012 | 568 | /* Unmap SKB mappings that succeeded and disable descriptor */ |
d4c41139 KG |
569 | for (i = 0; greth->tx_next + i != curr_tx; i++) { |
570 | bdp = greth->tx_bd_base + greth->tx_next + i; | |
571 | dma_unmap_single(greth->dev, | |
572 | greth_read_bd(&bdp->addr), | |
573 | greth_read_bd(&bdp->stat) & GRETH_BD_LEN, | |
574 | DMA_TO_DEVICE); | |
2a2bc012 | 575 | greth_write_bd(&bdp->stat, 0); |
d4c41139 KG |
576 | } |
577 | map_error: | |
578 | if (net_ratelimit()) | |
579 | dev_warn(greth->dev, "Could not create TX DMA mapping\n"); | |
580 | dev_kfree_skb(skb); | |
d4c41139 KG |
581 | out: |
582 | return err; | |
583 | } | |
584 | ||
d4c41139 KG |
585 | static irqreturn_t greth_interrupt(int irq, void *dev_id) |
586 | { | |
587 | struct net_device *dev = dev_id; | |
588 | struct greth_private *greth; | |
0f73f2c5 | 589 | u32 status, ctrl; |
d4c41139 KG |
590 | irqreturn_t retval = IRQ_NONE; |
591 | ||
592 | greth = netdev_priv(dev); | |
593 | ||
594 | spin_lock(&greth->devlock); | |
595 | ||
596 | /* Get the interrupt events that caused us to be here. */ | |
597 | status = GRETH_REGLOAD(greth->regs->status); | |
598 | ||
0f73f2c5 DH |
599 | /* Must see if interrupts are enabled also, INT_TX|INT_RX flags may be |
600 | * set regardless of whether IRQ is enabled or not. Especially | |
601 | * important when shared IRQ. | |
602 | */ | |
603 | ctrl = GRETH_REGLOAD(greth->regs->control); | |
d4c41139 | 604 | |
0f73f2c5 DH |
605 | /* Handle rx and tx interrupts through poll */ |
606 | if (((status & (GRETH_INT_RE | GRETH_INT_RX)) && (ctrl & GRETH_RXI)) || | |
607 | ((status & (GRETH_INT_TE | GRETH_INT_TX)) && (ctrl & GRETH_TXI))) { | |
d4c41139 KG |
608 | retval = IRQ_HANDLED; |
609 | ||
610 | /* Disable interrupts and schedule poll() */ | |
611 | greth_disable_irqs(greth); | |
612 | napi_schedule(&greth->napi); | |
613 | } | |
614 | ||
615 | mmiowb(); | |
616 | spin_unlock(&greth->devlock); | |
617 | ||
618 | return retval; | |
619 | } | |
620 | ||
621 | static void greth_clean_tx(struct net_device *dev) | |
622 | { | |
623 | struct greth_private *greth; | |
624 | struct greth_bd *bdp; | |
625 | u32 stat; | |
626 | ||
627 | greth = netdev_priv(dev); | |
628 | ||
629 | while (1) { | |
630 | bdp = greth->tx_bd_base + greth->tx_last; | |
0f73f2c5 DH |
631 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX); |
632 | mb(); | |
d4c41139 KG |
633 | stat = greth_read_bd(&bdp->stat); |
634 | ||
635 | if (unlikely(stat & GRETH_BD_EN)) | |
636 | break; | |
637 | ||
638 | if (greth->tx_free == GRETH_TXBD_NUM) | |
639 | break; | |
640 | ||
641 | /* Check status for errors */ | |
642 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
643 | dev->stats.tx_errors++; | |
644 | if (stat & GRETH_TXBD_ERR_AL) | |
645 | dev->stats.tx_aborted_errors++; | |
646 | if (stat & GRETH_TXBD_ERR_UE) | |
647 | dev->stats.tx_fifo_errors++; | |
648 | } | |
649 | dev->stats.tx_packets++; | |
6af29a96 | 650 | dev->stats.tx_bytes += greth->tx_bufs_length[greth->tx_last]; |
d4c41139 KG |
651 | greth->tx_last = NEXT_TX(greth->tx_last); |
652 | greth->tx_free++; | |
653 | } | |
654 | ||
655 | if (greth->tx_free > 0) { | |
656 | netif_wake_queue(dev); | |
657 | } | |
d4c41139 KG |
658 | } |
659 | ||
660 | static inline void greth_update_tx_stats(struct net_device *dev, u32 stat) | |
661 | { | |
662 | /* Check status for errors */ | |
663 | if (unlikely(stat & GRETH_TXBD_STATUS)) { | |
664 | dev->stats.tx_errors++; | |
665 | if (stat & GRETH_TXBD_ERR_AL) | |
666 | dev->stats.tx_aborted_errors++; | |
667 | if (stat & GRETH_TXBD_ERR_UE) | |
668 | dev->stats.tx_fifo_errors++; | |
669 | if (stat & GRETH_TXBD_ERR_LC) | |
670 | dev->stats.tx_aborted_errors++; | |
671 | } | |
672 | dev->stats.tx_packets++; | |
673 | } | |
674 | ||
675 | static void greth_clean_tx_gbit(struct net_device *dev) | |
676 | { | |
677 | struct greth_private *greth; | |
678 | struct greth_bd *bdp, *bdp_last_frag; | |
e1743a16 | 679 | struct sk_buff *skb = NULL; |
d4c41139 KG |
680 | u32 stat; |
681 | int nr_frags, i; | |
e1743a16 | 682 | u16 tx_last; |
d4c41139 KG |
683 | |
684 | greth = netdev_priv(dev); | |
e1743a16 | 685 | tx_last = greth->tx_last; |
d4c41139 | 686 | |
e1743a16 | 687 | while (tx_last != greth->tx_next) { |
d4c41139 | 688 | |
e1743a16 | 689 | skb = greth->tx_skbuff[tx_last]; |
d4c41139 KG |
690 | |
691 | nr_frags = skb_shinfo(skb)->nr_frags; | |
692 | ||
693 | /* We only clean fully completed SKBs */ | |
e1743a16 | 694 | bdp_last_frag = greth->tx_bd_base + SKIP_TX(tx_last, nr_frags); |
0f73f2c5 DH |
695 | |
696 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX); | |
697 | mb(); | |
698 | stat = greth_read_bd(&bdp_last_frag->stat); | |
d4c41139 KG |
699 | |
700 | if (stat & GRETH_BD_EN) | |
701 | break; | |
702 | ||
e1743a16 | 703 | greth->tx_skbuff[tx_last] = NULL; |
d4c41139 KG |
704 | |
705 | greth_update_tx_stats(dev, stat); | |
6af29a96 | 706 | dev->stats.tx_bytes += skb->len; |
d4c41139 | 707 | |
e1743a16 | 708 | bdp = greth->tx_bd_base + tx_last; |
d4c41139 | 709 | |
e1743a16 | 710 | tx_last = NEXT_TX(tx_last); |
d4c41139 KG |
711 | |
712 | dma_unmap_single(greth->dev, | |
713 | greth_read_bd(&bdp->addr), | |
714 | skb_headlen(skb), | |
715 | DMA_TO_DEVICE); | |
716 | ||
717 | for (i = 0; i < nr_frags; i++) { | |
718 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
e1743a16 | 719 | bdp = greth->tx_bd_base + tx_last; |
d4c41139 KG |
720 | |
721 | dma_unmap_page(greth->dev, | |
722 | greth_read_bd(&bdp->addr), | |
9e903e08 | 723 | skb_frag_size(frag), |
d4c41139 KG |
724 | DMA_TO_DEVICE); |
725 | ||
e1743a16 | 726 | tx_last = NEXT_TX(tx_last); |
d4c41139 | 727 | } |
d4c41139 KG |
728 | dev_kfree_skb(skb); |
729 | } | |
e1743a16 DH |
730 | if (skb) { /* skb is set only if the above while loop was entered */ |
731 | wmb(); | |
732 | greth->tx_last = tx_last; | |
d4c41139 | 733 | |
e1743a16 DH |
734 | if (netif_queue_stopped(dev) && |
735 | (greth_num_free_bds(tx_last, greth->tx_next) > | |
736 | (MAX_SKB_FRAGS+1))) | |
737 | netif_wake_queue(dev); | |
738 | } | |
d4c41139 KG |
739 | } |
740 | ||
741 | static int greth_rx(struct net_device *dev, int limit) | |
742 | { | |
743 | struct greth_private *greth; | |
744 | struct greth_bd *bdp; | |
745 | struct sk_buff *skb; | |
746 | int pkt_len; | |
747 | int bad, count; | |
748 | u32 status, dma_addr; | |
0f73f2c5 | 749 | unsigned long flags; |
d4c41139 KG |
750 | |
751 | greth = netdev_priv(dev); | |
752 | ||
753 | for (count = 0; count < limit; ++count) { | |
754 | ||
755 | bdp = greth->rx_bd_base + greth->rx_cur; | |
0f73f2c5 DH |
756 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX); |
757 | mb(); | |
d4c41139 | 758 | status = greth_read_bd(&bdp->stat); |
d4c41139 KG |
759 | |
760 | if (unlikely(status & GRETH_BD_EN)) { | |
761 | break; | |
762 | } | |
763 | ||
0f73f2c5 DH |
764 | dma_addr = greth_read_bd(&bdp->addr); |
765 | bad = 0; | |
766 | ||
d4c41139 KG |
767 | /* Check status for errors. */ |
768 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
769 | if (status & GRETH_RXBD_ERR_FT) { | |
770 | dev->stats.rx_length_errors++; | |
771 | bad = 1; | |
772 | } | |
773 | if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) { | |
774 | dev->stats.rx_frame_errors++; | |
775 | bad = 1; | |
776 | } | |
777 | if (status & GRETH_RXBD_ERR_CRC) { | |
778 | dev->stats.rx_crc_errors++; | |
779 | bad = 1; | |
780 | } | |
781 | } | |
782 | if (unlikely(bad)) { | |
783 | dev->stats.rx_errors++; | |
784 | ||
785 | } else { | |
786 | ||
787 | pkt_len = status & GRETH_BD_LEN; | |
788 | ||
789 | skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN); | |
790 | ||
791 | if (unlikely(skb == NULL)) { | |
792 | ||
793 | if (net_ratelimit()) | |
794 | dev_warn(&dev->dev, "low on memory - " "packet dropped\n"); | |
795 | ||
796 | dev->stats.rx_dropped++; | |
797 | ||
798 | } else { | |
799 | skb_reserve(skb, NET_IP_ALIGN); | |
d4c41139 KG |
800 | |
801 | dma_sync_single_for_cpu(greth->dev, | |
802 | dma_addr, | |
803 | pkt_len, | |
804 | DMA_FROM_DEVICE); | |
805 | ||
806 | if (netif_msg_pktdata(greth)) | |
807 | greth_print_rx_packet(phys_to_virt(dma_addr), pkt_len); | |
808 | ||
809 | memcpy(skb_put(skb, pkt_len), phys_to_virt(dma_addr), pkt_len); | |
810 | ||
811 | skb->protocol = eth_type_trans(skb, dev); | |
6af29a96 | 812 | dev->stats.rx_bytes += pkt_len; |
d4c41139 KG |
813 | dev->stats.rx_packets++; |
814 | netif_receive_skb(skb); | |
815 | } | |
816 | } | |
817 | ||
818 | status = GRETH_BD_EN | GRETH_BD_IE; | |
819 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
820 | status |= GRETH_BD_WR; | |
821 | } | |
822 | ||
823 | wmb(); | |
824 | greth_write_bd(&bdp->stat, status); | |
825 | ||
826 | dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE); | |
827 | ||
0f73f2c5 | 828 | spin_lock_irqsave(&greth->devlock, flags); /* save from XMIT */ |
d4c41139 | 829 | greth_enable_rx(greth); |
0f73f2c5 | 830 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
831 | |
832 | greth->rx_cur = NEXT_RX(greth->rx_cur); | |
833 | } | |
834 | ||
835 | return count; | |
836 | } | |
837 | ||
838 | static inline int hw_checksummed(u32 status) | |
839 | { | |
840 | ||
841 | if (status & GRETH_RXBD_IP_FRAG) | |
842 | return 0; | |
843 | ||
844 | if (status & GRETH_RXBD_IP && status & GRETH_RXBD_IP_CSERR) | |
845 | return 0; | |
846 | ||
847 | if (status & GRETH_RXBD_UDP && status & GRETH_RXBD_UDP_CSERR) | |
848 | return 0; | |
849 | ||
850 | if (status & GRETH_RXBD_TCP && status & GRETH_RXBD_TCP_CSERR) | |
851 | return 0; | |
852 | ||
853 | return 1; | |
854 | } | |
855 | ||
856 | static int greth_rx_gbit(struct net_device *dev, int limit) | |
857 | { | |
858 | struct greth_private *greth; | |
859 | struct greth_bd *bdp; | |
860 | struct sk_buff *skb, *newskb; | |
861 | int pkt_len; | |
862 | int bad, count = 0; | |
863 | u32 status, dma_addr; | |
0f73f2c5 | 864 | unsigned long flags; |
d4c41139 KG |
865 | |
866 | greth = netdev_priv(dev); | |
867 | ||
868 | for (count = 0; count < limit; ++count) { | |
869 | ||
870 | bdp = greth->rx_bd_base + greth->rx_cur; | |
871 | skb = greth->rx_skbuff[greth->rx_cur]; | |
0f73f2c5 DH |
872 | GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX); |
873 | mb(); | |
d4c41139 KG |
874 | status = greth_read_bd(&bdp->stat); |
875 | bad = 0; | |
876 | ||
877 | if (status & GRETH_BD_EN) | |
878 | break; | |
879 | ||
880 | /* Check status for errors. */ | |
881 | if (unlikely(status & GRETH_RXBD_STATUS)) { | |
882 | ||
883 | if (status & GRETH_RXBD_ERR_FT) { | |
884 | dev->stats.rx_length_errors++; | |
885 | bad = 1; | |
886 | } else if (status & | |
887 | (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE | GRETH_RXBD_ERR_LE)) { | |
888 | dev->stats.rx_frame_errors++; | |
889 | bad = 1; | |
890 | } else if (status & GRETH_RXBD_ERR_CRC) { | |
891 | dev->stats.rx_crc_errors++; | |
892 | bad = 1; | |
893 | } | |
894 | } | |
895 | ||
b669e7f0 DH |
896 | /* Allocate new skb to replace current, not needed if the |
897 | * current skb can be reused */ | |
898 | if (!bad && (newskb=netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN))) { | |
d4c41139 KG |
899 | skb_reserve(newskb, NET_IP_ALIGN); |
900 | ||
901 | dma_addr = dma_map_single(greth->dev, | |
902 | newskb->data, | |
903 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
904 | DMA_FROM_DEVICE); | |
905 | ||
906 | if (!dma_mapping_error(greth->dev, dma_addr)) { | |
907 | /* Process the incoming frame. */ | |
908 | pkt_len = status & GRETH_BD_LEN; | |
909 | ||
910 | dma_unmap_single(greth->dev, | |
911 | greth_read_bd(&bdp->addr), | |
912 | MAX_FRAME_SIZE + NET_IP_ALIGN, | |
913 | DMA_FROM_DEVICE); | |
914 | ||
915 | if (netif_msg_pktdata(greth)) | |
916 | greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp->addr)), pkt_len); | |
917 | ||
918 | skb_put(skb, pkt_len); | |
919 | ||
131ae329 | 920 | if (dev->features & NETIF_F_RXCSUM && hw_checksummed(status)) |
d4c41139 KG |
921 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
922 | else | |
bc8acf2c | 923 | skb_checksum_none_assert(skb); |
d4c41139 | 924 | |
d4c41139 KG |
925 | skb->protocol = eth_type_trans(skb, dev); |
926 | dev->stats.rx_packets++; | |
6af29a96 | 927 | dev->stats.rx_bytes += pkt_len; |
d4c41139 KG |
928 | netif_receive_skb(skb); |
929 | ||
930 | greth->rx_skbuff[greth->rx_cur] = newskb; | |
931 | greth_write_bd(&bdp->addr, dma_addr); | |
932 | } else { | |
933 | if (net_ratelimit()) | |
934 | dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n"); | |
935 | dev_kfree_skb(newskb); | |
b669e7f0 | 936 | /* reusing current skb, so it is a drop */ |
d4c41139 KG |
937 | dev->stats.rx_dropped++; |
938 | } | |
b669e7f0 DH |
939 | } else if (bad) { |
940 | /* Bad Frame transfer, the skb is reused */ | |
941 | dev->stats.rx_dropped++; | |
d4c41139 | 942 | } else { |
b669e7f0 DH |
943 | /* Failed Allocating a new skb. This is rather stupid |
944 | * but the current "filled" skb is reused, as if | |
945 | * transfer failure. One could argue that RX descriptor | |
946 | * table handling should be divided into cleaning and | |
947 | * filling as the TX part of the driver | |
948 | */ | |
d4c41139 KG |
949 | if (net_ratelimit()) |
950 | dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n"); | |
b669e7f0 | 951 | /* reusing current skb, so it is a drop */ |
d4c41139 KG |
952 | dev->stats.rx_dropped++; |
953 | } | |
954 | ||
955 | status = GRETH_BD_EN | GRETH_BD_IE; | |
956 | if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { | |
957 | status |= GRETH_BD_WR; | |
958 | } | |
959 | ||
960 | wmb(); | |
961 | greth_write_bd(&bdp->stat, status); | |
0f73f2c5 | 962 | spin_lock_irqsave(&greth->devlock, flags); |
d4c41139 | 963 | greth_enable_rx(greth); |
0f73f2c5 | 964 | spin_unlock_irqrestore(&greth->devlock, flags); |
d4c41139 KG |
965 | greth->rx_cur = NEXT_RX(greth->rx_cur); |
966 | } | |
967 | ||
968 | return count; | |
969 | ||
970 | } | |
971 | ||
972 | static int greth_poll(struct napi_struct *napi, int budget) | |
973 | { | |
974 | struct greth_private *greth; | |
975 | int work_done = 0; | |
0f73f2c5 DH |
976 | unsigned long flags; |
977 | u32 mask, ctrl; | |
d4c41139 KG |
978 | greth = container_of(napi, struct greth_private, napi); |
979 | ||
0f73f2c5 | 980 | restart_txrx_poll: |
d4c41139 | 981 | if (greth->gbit_mac) { |
e1743a16 | 982 | greth_clean_tx_gbit(greth->netdev); |
d4c41139 KG |
983 | work_done += greth_rx_gbit(greth->netdev, budget - work_done); |
984 | } else { | |
e1743a16 DH |
985 | if (netif_queue_stopped(greth->netdev)) |
986 | greth_clean_tx(greth->netdev); | |
d4c41139 KG |
987 | work_done += greth_rx(greth->netdev, budget - work_done); |
988 | } | |
989 | ||
990 | if (work_done < budget) { | |
991 | ||
0f73f2c5 | 992 | spin_lock_irqsave(&greth->devlock, flags); |
d4c41139 | 993 | |
0f73f2c5 | 994 | ctrl = GRETH_REGLOAD(greth->regs->control); |
e1743a16 DH |
995 | if ((greth->gbit_mac && (greth->tx_last != greth->tx_next)) || |
996 | (!greth->gbit_mac && netif_queue_stopped(greth->netdev))) { | |
0f73f2c5 DH |
997 | GRETH_REGSAVE(greth->regs->control, |
998 | ctrl | GRETH_TXI | GRETH_RXI); | |
999 | mask = GRETH_INT_RX | GRETH_INT_RE | | |
1000 | GRETH_INT_TX | GRETH_INT_TE; | |
1001 | } else { | |
1002 | GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_RXI); | |
1003 | mask = GRETH_INT_RX | GRETH_INT_RE; | |
1004 | } | |
1005 | ||
1006 | if (GRETH_REGLOAD(greth->regs->status) & mask) { | |
1007 | GRETH_REGSAVE(greth->regs->control, ctrl); | |
1008 | spin_unlock_irqrestore(&greth->devlock, flags); | |
1009 | goto restart_txrx_poll; | |
1010 | } else { | |
1011 | __napi_complete(napi); | |
1012 | spin_unlock_irqrestore(&greth->devlock, flags); | |
d4c41139 KG |
1013 | } |
1014 | } | |
1015 | ||
d4c41139 KG |
1016 | return work_done; |
1017 | } | |
1018 | ||
1019 | static int greth_set_mac_add(struct net_device *dev, void *p) | |
1020 | { | |
1021 | struct sockaddr *addr = p; | |
1022 | struct greth_private *greth; | |
1023 | struct greth_regs *regs; | |
1024 | ||
6e03718c | 1025 | greth = netdev_priv(dev); |
64699336 | 1026 | regs = greth->regs; |
d4c41139 KG |
1027 | |
1028 | if (!is_valid_ether_addr(addr->sa_data)) | |
504f9b5a | 1029 | return -EADDRNOTAVAIL; |
d4c41139 KG |
1030 | |
1031 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
9b9cfe7c KG |
1032 | GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); |
1033 | GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | | |
1034 | dev->dev_addr[4] << 8 | dev->dev_addr[5]); | |
d4c41139 | 1035 | |
d4c41139 KG |
1036 | return 0; |
1037 | } | |
1038 | ||
1039 | static u32 greth_hash_get_index(__u8 *addr) | |
1040 | { | |
1041 | return (ether_crc(6, addr)) & 0x3F; | |
1042 | } | |
1043 | ||
1044 | static void greth_set_hash_filter(struct net_device *dev) | |
1045 | { | |
22bedad3 | 1046 | struct netdev_hw_addr *ha; |
6e03718c | 1047 | struct greth_private *greth = netdev_priv(dev); |
64699336 | 1048 | struct greth_regs *regs = greth->regs; |
d4c41139 | 1049 | u32 mc_filter[2]; |
6e03718c | 1050 | unsigned int bitnr; |
d4c41139 KG |
1051 | |
1052 | mc_filter[0] = mc_filter[1] = 0; | |
1053 | ||
22bedad3 JP |
1054 | netdev_for_each_mc_addr(ha, dev) { |
1055 | bitnr = greth_hash_get_index(ha->addr); | |
d4c41139 KG |
1056 | mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); |
1057 | } | |
1058 | ||
1059 | GRETH_REGSAVE(regs->hash_msb, mc_filter[1]); | |
1060 | GRETH_REGSAVE(regs->hash_lsb, mc_filter[0]); | |
1061 | } | |
1062 | ||
1063 | static void greth_set_multicast_list(struct net_device *dev) | |
1064 | { | |
1065 | int cfg; | |
1066 | struct greth_private *greth = netdev_priv(dev); | |
64699336 | 1067 | struct greth_regs *regs = greth->regs; |
d4c41139 KG |
1068 | |
1069 | cfg = GRETH_REGLOAD(regs->control); | |
1070 | if (dev->flags & IFF_PROMISC) | |
1071 | cfg |= GRETH_CTRL_PR; | |
1072 | else | |
1073 | cfg &= ~GRETH_CTRL_PR; | |
1074 | ||
1075 | if (greth->multicast) { | |
1076 | if (dev->flags & IFF_ALLMULTI) { | |
1077 | GRETH_REGSAVE(regs->hash_msb, -1); | |
1078 | GRETH_REGSAVE(regs->hash_lsb, -1); | |
1079 | cfg |= GRETH_CTRL_MCEN; | |
1080 | GRETH_REGSAVE(regs->control, cfg); | |
1081 | return; | |
1082 | } | |
1083 | ||
6e03718c | 1084 | if (netdev_mc_empty(dev)) { |
d4c41139 KG |
1085 | cfg &= ~GRETH_CTRL_MCEN; |
1086 | GRETH_REGSAVE(regs->control, cfg); | |
1087 | return; | |
1088 | } | |
1089 | ||
1090 | /* Setup multicast filter */ | |
1091 | greth_set_hash_filter(dev); | |
1092 | cfg |= GRETH_CTRL_MCEN; | |
1093 | } | |
1094 | GRETH_REGSAVE(regs->control, cfg); | |
1095 | } | |
1096 | ||
1097 | static u32 greth_get_msglevel(struct net_device *dev) | |
1098 | { | |
1099 | struct greth_private *greth = netdev_priv(dev); | |
1100 | return greth->msg_enable; | |
1101 | } | |
1102 | ||
1103 | static void greth_set_msglevel(struct net_device *dev, u32 value) | |
1104 | { | |
1105 | struct greth_private *greth = netdev_priv(dev); | |
1106 | greth->msg_enable = value; | |
1107 | } | |
1108 | static int greth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1109 | { | |
1110 | struct greth_private *greth = netdev_priv(dev); | |
1111 | struct phy_device *phy = greth->phy; | |
1112 | ||
1113 | if (!phy) | |
1114 | return -ENODEV; | |
1115 | ||
1116 | return phy_ethtool_gset(phy, cmd); | |
1117 | } | |
1118 | ||
1119 | static int greth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1120 | { | |
1121 | struct greth_private *greth = netdev_priv(dev); | |
1122 | struct phy_device *phy = greth->phy; | |
1123 | ||
1124 | if (!phy) | |
1125 | return -ENODEV; | |
1126 | ||
1127 | return phy_ethtool_sset(phy, cmd); | |
1128 | } | |
1129 | ||
1130 | static int greth_get_regs_len(struct net_device *dev) | |
1131 | { | |
1132 | return sizeof(struct greth_regs); | |
1133 | } | |
1134 | ||
1135 | static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1136 | { | |
1137 | struct greth_private *greth = netdev_priv(dev); | |
1138 | ||
7826d43f JP |
1139 | strlcpy(info->driver, dev_driver_string(greth->dev), |
1140 | sizeof(info->driver)); | |
1141 | strlcpy(info->version, "revision: 1.0", sizeof(info->version)); | |
1142 | strlcpy(info->bus_info, greth->dev->bus->name, sizeof(info->bus_info)); | |
1143 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
d4c41139 KG |
1144 | } |
1145 | ||
1146 | static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) | |
1147 | { | |
1148 | int i; | |
1149 | struct greth_private *greth = netdev_priv(dev); | |
1150 | u32 __iomem *greth_regs = (u32 __iomem *) greth->regs; | |
1151 | u32 *buff = p; | |
1152 | ||
1153 | for (i = 0; i < sizeof(struct greth_regs) / sizeof(u32); i++) | |
1154 | buff[i] = greth_read_bd(&greth_regs[i]); | |
1155 | } | |
1156 | ||
d4c41139 KG |
1157 | static const struct ethtool_ops greth_ethtool_ops = { |
1158 | .get_msglevel = greth_get_msglevel, | |
1159 | .set_msglevel = greth_set_msglevel, | |
1160 | .get_settings = greth_get_settings, | |
1161 | .set_settings = greth_set_settings, | |
1162 | .get_drvinfo = greth_get_drvinfo, | |
1163 | .get_regs_len = greth_get_regs_len, | |
1164 | .get_regs = greth_get_regs, | |
d4c41139 KG |
1165 | .get_link = ethtool_op_get_link, |
1166 | }; | |
1167 | ||
1168 | static struct net_device_ops greth_netdev_ops = { | |
0f73f2c5 DH |
1169 | .ndo_open = greth_open, |
1170 | .ndo_stop = greth_close, | |
1171 | .ndo_start_xmit = greth_start_xmit, | |
1172 | .ndo_set_mac_address = greth_set_mac_add, | |
1173 | .ndo_validate_addr = eth_validate_addr, | |
d4c41139 KG |
1174 | }; |
1175 | ||
1176 | static inline int wait_for_mdio(struct greth_private *greth) | |
1177 | { | |
1178 | unsigned long timeout = jiffies + 4*HZ/100; | |
1179 | while (GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_BUSY) { | |
1180 | if (time_after(jiffies, timeout)) | |
1181 | return 0; | |
1182 | } | |
1183 | return 1; | |
1184 | } | |
1185 | ||
1186 | static int greth_mdio_read(struct mii_bus *bus, int phy, int reg) | |
1187 | { | |
1188 | struct greth_private *greth = bus->priv; | |
1189 | int data; | |
1190 | ||
1191 | if (!wait_for_mdio(greth)) | |
1192 | return -EBUSY; | |
1193 | ||
1194 | GRETH_REGSAVE(greth->regs->mdio, ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 2); | |
1195 | ||
1196 | if (!wait_for_mdio(greth)) | |
1197 | return -EBUSY; | |
1198 | ||
1199 | if (!(GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_NVALID)) { | |
1200 | data = (GRETH_REGLOAD(greth->regs->mdio) >> 16) & 0xFFFF; | |
1201 | return data; | |
1202 | ||
1203 | } else { | |
1204 | return -1; | |
1205 | } | |
1206 | } | |
1207 | ||
1208 | static int greth_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) | |
1209 | { | |
1210 | struct greth_private *greth = bus->priv; | |
1211 | ||
1212 | if (!wait_for_mdio(greth)) | |
1213 | return -EBUSY; | |
1214 | ||
1215 | GRETH_REGSAVE(greth->regs->mdio, | |
1216 | ((val & 0xFFFF) << 16) | ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 1); | |
1217 | ||
1218 | if (!wait_for_mdio(greth)) | |
1219 | return -EBUSY; | |
1220 | ||
1221 | return 0; | |
1222 | } | |
1223 | ||
d4c41139 KG |
1224 | static void greth_link_change(struct net_device *dev) |
1225 | { | |
1226 | struct greth_private *greth = netdev_priv(dev); | |
1227 | struct phy_device *phydev = greth->phy; | |
1228 | unsigned long flags; | |
d4c41139 | 1229 | int status_change = 0; |
2436af8c | 1230 | u32 ctrl; |
d4c41139 KG |
1231 | |
1232 | spin_lock_irqsave(&greth->devlock, flags); | |
1233 | ||
1234 | if (phydev->link) { | |
1235 | ||
1236 | if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) { | |
2436af8c DH |
1237 | ctrl = GRETH_REGLOAD(greth->regs->control) & |
1238 | ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB); | |
d4c41139 KG |
1239 | |
1240 | if (phydev->duplex) | |
2436af8c | 1241 | ctrl |= GRETH_CTRL_FD; |
d4c41139 | 1242 | |
2436af8c DH |
1243 | if (phydev->speed == SPEED_100) |
1244 | ctrl |= GRETH_CTRL_SP; | |
d4c41139 | 1245 | else if (phydev->speed == SPEED_1000) |
2436af8c | 1246 | ctrl |= GRETH_CTRL_GB; |
d4c41139 | 1247 | |
2436af8c | 1248 | GRETH_REGSAVE(greth->regs->control, ctrl); |
d4c41139 KG |
1249 | greth->speed = phydev->speed; |
1250 | greth->duplex = phydev->duplex; | |
1251 | status_change = 1; | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | if (phydev->link != greth->link) { | |
1256 | if (!phydev->link) { | |
1257 | greth->speed = 0; | |
1258 | greth->duplex = -1; | |
1259 | } | |
1260 | greth->link = phydev->link; | |
1261 | ||
1262 | status_change = 1; | |
1263 | } | |
1264 | ||
1265 | spin_unlock_irqrestore(&greth->devlock, flags); | |
1266 | ||
1267 | if (status_change) { | |
1268 | if (phydev->link) | |
1269 | pr_debug("%s: link up (%d/%s)\n", | |
1270 | dev->name, phydev->speed, | |
1271 | DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); | |
1272 | else | |
1273 | pr_debug("%s: link down\n", dev->name); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | static int greth_mdio_probe(struct net_device *dev) | |
1278 | { | |
1279 | struct greth_private *greth = netdev_priv(dev); | |
1280 | struct phy_device *phy = NULL; | |
6e03718c | 1281 | int ret; |
d4c41139 KG |
1282 | |
1283 | /* Find the first PHY */ | |
6e03718c | 1284 | phy = phy_find_first(greth->mdio); |
1285 | ||
d4c41139 KG |
1286 | if (!phy) { |
1287 | if (netif_msg_probe(greth)) | |
1288 | dev_err(&dev->dev, "no PHY found\n"); | |
1289 | return -ENXIO; | |
1290 | } | |
1291 | ||
6e03718c | 1292 | ret = phy_connect_direct(dev, phy, &greth_link_change, |
f9a8f83b | 1293 | greth->gbit_mac ? PHY_INTERFACE_MODE_GMII : PHY_INTERFACE_MODE_MII); |
6e03718c | 1294 | if (ret) { |
1295 | if (netif_msg_ifup(greth)) | |
1296 | dev_err(&dev->dev, "could not attach to PHY\n"); | |
1297 | return ret; | |
1298 | } | |
d4c41139 KG |
1299 | |
1300 | if (greth->gbit_mac) | |
1301 | phy->supported &= PHY_GBIT_FEATURES; | |
1302 | else | |
1303 | phy->supported &= PHY_BASIC_FEATURES; | |
1304 | ||
1305 | phy->advertising = phy->supported; | |
1306 | ||
d4c41139 KG |
1307 | greth->link = 0; |
1308 | greth->speed = 0; | |
1309 | greth->duplex = -1; | |
1310 | greth->phy = phy; | |
1311 | ||
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | static inline int phy_aneg_done(struct phy_device *phydev) | |
1316 | { | |
1317 | int retval; | |
1318 | ||
1319 | retval = phy_read(phydev, MII_BMSR); | |
1320 | ||
1321 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1322 | } | |
1323 | ||
1324 | static int greth_mdio_init(struct greth_private *greth) | |
1325 | { | |
b1ac6b7b | 1326 | int ret; |
d4c41139 KG |
1327 | unsigned long timeout; |
1328 | ||
1329 | greth->mdio = mdiobus_alloc(); | |
1330 | if (!greth->mdio) { | |
1331 | return -ENOMEM; | |
1332 | } | |
1333 | ||
1334 | greth->mdio->name = "greth-mdio"; | |
1335 | snprintf(greth->mdio->id, MII_BUS_ID_SIZE, "%s-%d", greth->mdio->name, greth->irq); | |
1336 | greth->mdio->read = greth_mdio_read; | |
1337 | greth->mdio->write = greth_mdio_write; | |
d4c41139 KG |
1338 | greth->mdio->priv = greth; |
1339 | ||
d4c41139 KG |
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 | } | |
f0528ce7 | 1360 | phy_read_status(greth->phy); |
d4c41139 KG |
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 */ | |
c0c0e29d | 1374 | static int greth_of_probe(struct platform_device *ofdev) |
d4c41139 KG |
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 | ||
64699336 | 1412 | regs = greth->regs; |
19e4875f | 1413 | greth->irq = ofdev->archdata.irqs[0]; |
d4c41139 KG |
1414 | |
1415 | dev_set_drvdata(greth->dev, dev); | |
1416 | SET_NETDEV_DEV(dev, greth->dev); | |
1417 | ||
1418 | if (netif_msg_probe(greth)) | |
72e60278 | 1419 | dev_dbg(greth->dev, "resetting controller.\n"); |
d4c41139 KG |
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 */ | |
ede23fa8 JP |
1463 | greth->tx_bd_base = dma_zalloc_coherent(greth->dev, 1024, |
1464 | &greth->tx_bd_base_phys, | |
1465 | GFP_KERNEL); | |
d4c41139 | 1466 | if (!greth->tx_bd_base) { |
d4c41139 KG |
1467 | err = -ENOMEM; |
1468 | goto error3; | |
1469 | } | |
1470 | ||
d4c41139 | 1471 | /* Allocate RX descriptor ring in coherent memory */ |
ede23fa8 JP |
1472 | greth->rx_bd_base = dma_zalloc_coherent(greth->dev, 1024, |
1473 | &greth->rx_bd_base_phys, | |
1474 | GFP_KERNEL); | |
d4c41139 | 1475 | if (!greth->rx_bd_base) { |
d4c41139 KG |
1476 | err = -ENOMEM; |
1477 | goto error4; | |
1478 | } | |
1479 | ||
d4c41139 KG |
1480 | /* Get MAC address from: module param, OF property or ID prom */ |
1481 | for (i = 0; i < 6; i++) { | |
1482 | if (macaddr[i] != 0) | |
1483 | break; | |
1484 | } | |
1485 | if (i == 6) { | |
1486 | const unsigned char *addr; | |
1487 | int len; | |
61c7a080 GL |
1488 | addr = of_get_property(ofdev->dev.of_node, "local-mac-address", |
1489 | &len); | |
d4c41139 KG |
1490 | if (addr != NULL && len == 6) { |
1491 | for (i = 0; i < 6; i++) | |
1492 | macaddr[i] = (unsigned int) addr[i]; | |
1493 | } else { | |
1494 | #ifdef CONFIG_SPARC | |
1495 | for (i = 0; i < 6; i++) | |
1496 | macaddr[i] = (unsigned int) idprom->id_ethaddr[i]; | |
1497 | #endif | |
1498 | } | |
1499 | } | |
1500 | ||
1501 | for (i = 0; i < 6; i++) | |
1502 | dev->dev_addr[i] = macaddr[i]; | |
1503 | ||
1504 | macaddr[5]++; | |
1505 | ||
1506 | if (!is_valid_ether_addr(&dev->dev_addr[0])) { | |
1507 | if (netif_msg_probe(greth)) | |
1508 | dev_err(greth->dev, "no valid ethernet address, aborting.\n"); | |
1509 | err = -EINVAL; | |
1510 | goto error5; | |
1511 | } | |
1512 | ||
1513 | GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); | |
1514 | GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | | |
1515 | dev->dev_addr[4] << 8 | dev->dev_addr[5]); | |
1516 | ||
1517 | /* Clear all pending interrupts except PHY irq */ | |
1518 | GRETH_REGSAVE(regs->status, 0xFF); | |
1519 | ||
1520 | if (greth->gbit_mac) { | |
131ae329 MM |
1521 | dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | |
1522 | NETIF_F_RXCSUM; | |
1523 | dev->features = dev->hw_features | NETIF_F_HIGHDMA; | |
d4c41139 | 1524 | greth_netdev_ops.ndo_start_xmit = greth_start_xmit_gbit; |
d4c41139 KG |
1525 | } |
1526 | ||
1527 | if (greth->multicast) { | |
afc4b13d | 1528 | greth_netdev_ops.ndo_set_rx_mode = greth_set_multicast_list; |
d4c41139 KG |
1529 | dev->flags |= IFF_MULTICAST; |
1530 | } else { | |
1531 | dev->flags &= ~IFF_MULTICAST; | |
1532 | } | |
1533 | ||
1534 | dev->netdev_ops = &greth_netdev_ops; | |
1535 | dev->ethtool_ops = &greth_ethtool_ops; | |
1536 | ||
cb5d991a TK |
1537 | err = register_netdev(dev); |
1538 | if (err) { | |
d4c41139 KG |
1539 | if (netif_msg_probe(greth)) |
1540 | dev_err(greth->dev, "netdevice registration failed.\n"); | |
d4c41139 KG |
1541 | goto error5; |
1542 | } | |
1543 | ||
1544 | /* setup NAPI */ | |
d4c41139 KG |
1545 | netif_napi_add(dev, &greth->napi, greth_poll, 64); |
1546 | ||
1547 | return 0; | |
1548 | ||
1549 | error5: | |
1550 | dma_free_coherent(greth->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1551 | error4: | |
1552 | dma_free_coherent(greth->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1553 | error3: | |
1554 | mdiobus_unregister(greth->mdio); | |
1555 | error2: | |
1556 | of_iounmap(&ofdev->resource[0], greth->regs, resource_size(&ofdev->resource[0])); | |
1557 | error1: | |
1558 | free_netdev(dev); | |
1559 | return err; | |
1560 | } | |
1561 | ||
c0c0e29d | 1562 | static int greth_of_remove(struct platform_device *of_dev) |
d4c41139 | 1563 | { |
8513fbd8 | 1564 | struct net_device *ndev = platform_get_drvdata(of_dev); |
d4c41139 KG |
1565 | struct greth_private *greth = netdev_priv(ndev); |
1566 | ||
1567 | /* Free descriptor areas */ | |
1568 | dma_free_coherent(&of_dev->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); | |
1569 | ||
1570 | dma_free_coherent(&of_dev->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); | |
1571 | ||
d4c41139 KG |
1572 | if (greth->phy) |
1573 | phy_stop(greth->phy); | |
1574 | mdiobus_unregister(greth->mdio); | |
1575 | ||
1576 | unregister_netdev(ndev); | |
1577 | free_netdev(ndev); | |
1578 | ||
1579 | of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0])); | |
1580 | ||
1581 | return 0; | |
1582 | } | |
1583 | ||
73c70474 | 1584 | static const struct of_device_id greth_of_match[] = { |
d4c41139 KG |
1585 | { |
1586 | .name = "GAISLER_ETHMAC", | |
1587 | }, | |
ad4650a8 DH |
1588 | { |
1589 | .name = "01_01d", | |
1590 | }, | |
d4c41139 KG |
1591 | {}, |
1592 | }; | |
1593 | ||
1594 | MODULE_DEVICE_TABLE(of, greth_of_match); | |
1595 | ||
74888760 | 1596 | static struct platform_driver greth_of_driver = { |
bc284f94 DM |
1597 | .driver = { |
1598 | .name = "grlib-greth", | |
bc284f94 DM |
1599 | .of_match_table = greth_of_match, |
1600 | }, | |
d4c41139 | 1601 | .probe = greth_of_probe, |
c0c0e29d | 1602 | .remove = greth_of_remove, |
d4c41139 KG |
1603 | }; |
1604 | ||
db62f684 | 1605 | module_platform_driver(greth_of_driver); |
d4c41139 KG |
1606 | |
1607 | MODULE_AUTHOR("Aeroflex Gaisler AB."); | |
1608 | MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver"); | |
1609 | MODULE_LICENSE("GPL"); |