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Commit | Line | Data |
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0bbaf069 | 1 | /* |
1da177e4 LT |
2 | * drivers/net/gianfar.c |
3 | * | |
4 | * Gianfar Ethernet Driver | |
7f7f5316 AF |
5 | * This driver is designed for the non-CPM ethernet controllers |
6 | * on the 85xx and 83xx family of integrated processors | |
1da177e4 LT |
7 | * Based on 8260_io/fcc_enet.c |
8 | * | |
9 | * Author: Andy Fleming | |
4c8d3d99 | 10 | * Maintainer: Kumar Gala |
1da177e4 | 11 | * |
e8a2b6a4 | 12 | * Copyright (c) 2002-2006 Freescale Semiconductor, Inc. |
538cc7ee | 13 | * Copyright (c) 2007 MontaVista Software, Inc. |
1da177e4 LT |
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 | * Gianfar: AKA Lambda Draconis, "Dragon" | |
21 | * RA 11 31 24.2 | |
22 | * Dec +69 19 52 | |
23 | * V 3.84 | |
24 | * B-V +1.62 | |
25 | * | |
26 | * Theory of operation | |
0bbaf069 | 27 | * |
b31a1d8b AF |
28 | * The driver is initialized through of_device. Configuration information |
29 | * is therefore conveyed through an OF-style device tree. | |
1da177e4 LT |
30 | * |
31 | * The Gianfar Ethernet Controller uses a ring of buffer | |
32 | * descriptors. The beginning is indicated by a register | |
0bbaf069 KG |
33 | * pointing to the physical address of the start of the ring. |
34 | * The end is determined by a "wrap" bit being set in the | |
1da177e4 LT |
35 | * last descriptor of the ring. |
36 | * | |
37 | * When a packet is received, the RXF bit in the | |
0bbaf069 | 38 | * IEVENT register is set, triggering an interrupt when the |
1da177e4 LT |
39 | * corresponding bit in the IMASK register is also set (if |
40 | * interrupt coalescing is active, then the interrupt may not | |
41 | * happen immediately, but will wait until either a set number | |
bb40dcbb | 42 | * of frames or amount of time have passed). In NAPI, the |
1da177e4 | 43 | * interrupt handler will signal there is work to be done, and |
0aa1538f | 44 | * exit. This method will start at the last known empty |
0bbaf069 | 45 | * descriptor, and process every subsequent descriptor until there |
1da177e4 LT |
46 | * are none left with data (NAPI will stop after a set number of |
47 | * packets to give time to other tasks, but will eventually | |
48 | * process all the packets). The data arrives inside a | |
49 | * pre-allocated skb, and so after the skb is passed up to the | |
50 | * stack, a new skb must be allocated, and the address field in | |
51 | * the buffer descriptor must be updated to indicate this new | |
52 | * skb. | |
53 | * | |
54 | * When the kernel requests that a packet be transmitted, the | |
55 | * driver starts where it left off last time, and points the | |
56 | * descriptor at the buffer which was passed in. The driver | |
57 | * then informs the DMA engine that there are packets ready to | |
58 | * be transmitted. Once the controller is finished transmitting | |
59 | * the packet, an interrupt may be triggered (under the same | |
60 | * conditions as for reception, but depending on the TXF bit). | |
61 | * The driver then cleans up the buffer. | |
62 | */ | |
63 | ||
1da177e4 | 64 | #include <linux/kernel.h> |
1da177e4 LT |
65 | #include <linux/string.h> |
66 | #include <linux/errno.h> | |
bb40dcbb | 67 | #include <linux/unistd.h> |
1da177e4 LT |
68 | #include <linux/slab.h> |
69 | #include <linux/interrupt.h> | |
70 | #include <linux/init.h> | |
71 | #include <linux/delay.h> | |
72 | #include <linux/netdevice.h> | |
73 | #include <linux/etherdevice.h> | |
74 | #include <linux/skbuff.h> | |
0bbaf069 | 75 | #include <linux/if_vlan.h> |
1da177e4 LT |
76 | #include <linux/spinlock.h> |
77 | #include <linux/mm.h> | |
fe192a49 | 78 | #include <linux/of_mdio.h> |
b31a1d8b | 79 | #include <linux/of_platform.h> |
0bbaf069 KG |
80 | #include <linux/ip.h> |
81 | #include <linux/tcp.h> | |
82 | #include <linux/udp.h> | |
9c07b884 | 83 | #include <linux/in.h> |
1da177e4 LT |
84 | |
85 | #include <asm/io.h> | |
86 | #include <asm/irq.h> | |
87 | #include <asm/uaccess.h> | |
88 | #include <linux/module.h> | |
1da177e4 LT |
89 | #include <linux/dma-mapping.h> |
90 | #include <linux/crc32.h> | |
bb40dcbb AF |
91 | #include <linux/mii.h> |
92 | #include <linux/phy.h> | |
b31a1d8b AF |
93 | #include <linux/phy_fixed.h> |
94 | #include <linux/of.h> | |
1da177e4 LT |
95 | |
96 | #include "gianfar.h" | |
1577ecef | 97 | #include "fsl_pq_mdio.h" |
1da177e4 LT |
98 | |
99 | #define TX_TIMEOUT (1*HZ) | |
1da177e4 LT |
100 | #undef BRIEF_GFAR_ERRORS |
101 | #undef VERBOSE_GFAR_ERRORS | |
102 | ||
1da177e4 | 103 | const char gfar_driver_name[] = "Gianfar Ethernet"; |
7f7f5316 | 104 | const char gfar_driver_version[] = "1.3"; |
1da177e4 | 105 | |
1da177e4 LT |
106 | static int gfar_enet_open(struct net_device *dev); |
107 | static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
ab939905 | 108 | static void gfar_reset_task(struct work_struct *work); |
1da177e4 LT |
109 | static void gfar_timeout(struct net_device *dev); |
110 | static int gfar_close(struct net_device *dev); | |
815b97c6 AF |
111 | struct sk_buff *gfar_new_skb(struct net_device *dev); |
112 | static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp, | |
113 | struct sk_buff *skb); | |
1da177e4 LT |
114 | static int gfar_set_mac_address(struct net_device *dev); |
115 | static int gfar_change_mtu(struct net_device *dev, int new_mtu); | |
7d12e780 DH |
116 | static irqreturn_t gfar_error(int irq, void *dev_id); |
117 | static irqreturn_t gfar_transmit(int irq, void *dev_id); | |
118 | static irqreturn_t gfar_interrupt(int irq, void *dev_id); | |
1da177e4 LT |
119 | static void adjust_link(struct net_device *dev); |
120 | static void init_registers(struct net_device *dev); | |
121 | static int init_phy(struct net_device *dev); | |
b31a1d8b AF |
122 | static int gfar_probe(struct of_device *ofdev, |
123 | const struct of_device_id *match); | |
124 | static int gfar_remove(struct of_device *ofdev); | |
bb40dcbb | 125 | static void free_skb_resources(struct gfar_private *priv); |
1da177e4 LT |
126 | static void gfar_set_multi(struct net_device *dev); |
127 | static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr); | |
d3c12873 | 128 | static void gfar_configure_serdes(struct net_device *dev); |
bea3348e | 129 | static int gfar_poll(struct napi_struct *napi, int budget); |
f2d71c2d VW |
130 | #ifdef CONFIG_NET_POLL_CONTROLLER |
131 | static void gfar_netpoll(struct net_device *dev); | |
132 | #endif | |
0bbaf069 | 133 | int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit); |
f162b9d5 | 134 | static int gfar_clean_tx_ring(struct net_device *dev); |
2c2db48a DH |
135 | static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, |
136 | int amount_pull); | |
0bbaf069 KG |
137 | static void gfar_vlan_rx_register(struct net_device *netdev, |
138 | struct vlan_group *grp); | |
7f7f5316 | 139 | void gfar_halt(struct net_device *dev); |
d87eb127 | 140 | static void gfar_halt_nodisable(struct net_device *dev); |
7f7f5316 AF |
141 | void gfar_start(struct net_device *dev); |
142 | static void gfar_clear_exact_match(struct net_device *dev); | |
143 | static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr); | |
26ccfc37 | 144 | static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
1da177e4 | 145 | |
1da177e4 LT |
146 | MODULE_AUTHOR("Freescale Semiconductor, Inc"); |
147 | MODULE_DESCRIPTION("Gianfar Ethernet Driver"); | |
148 | MODULE_LICENSE("GPL"); | |
149 | ||
8a102fe0 AV |
150 | static void gfar_init_rxbdp(struct net_device *dev, struct rxbd8 *bdp, |
151 | dma_addr_t buf) | |
152 | { | |
153 | struct gfar_private *priv = netdev_priv(dev); | |
154 | u32 lstatus; | |
155 | ||
156 | bdp->bufPtr = buf; | |
157 | ||
158 | lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT); | |
159 | if (bdp == priv->rx_bd_base + priv->rx_ring_size - 1) | |
160 | lstatus |= BD_LFLAG(RXBD_WRAP); | |
161 | ||
162 | eieio(); | |
163 | ||
164 | bdp->lstatus = lstatus; | |
165 | } | |
166 | ||
826aa4a0 AV |
167 | static int gfar_alloc_skb_resources(struct net_device *ndev) |
168 | { | |
169 | struct txbd8 *txbdp; | |
170 | struct rxbd8 *rxbdp; | |
826aa4a0 AV |
171 | void *vaddr; |
172 | int i; | |
173 | struct gfar_private *priv = netdev_priv(ndev); | |
174 | struct device *dev = &priv->ofdev->dev; | |
826aa4a0 AV |
175 | |
176 | /* Allocate memory for the buffer descriptors */ | |
177 | vaddr = dma_alloc_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size + | |
178 | sizeof(*rxbdp) * priv->rx_ring_size, | |
32c513bc | 179 | &priv->tx_bd_dma_base, GFP_KERNEL); |
826aa4a0 AV |
180 | if (!vaddr) { |
181 | if (netif_msg_ifup(priv)) | |
182 | pr_err("%s: Could not allocate buffer descriptors!\n", | |
183 | ndev->name); | |
184 | return -ENOMEM; | |
185 | } | |
186 | ||
187 | priv->tx_bd_base = vaddr; | |
188 | ||
826aa4a0 | 189 | /* Start the rx descriptor ring where the tx ring leaves off */ |
826aa4a0 AV |
190 | vaddr = vaddr + sizeof(*txbdp) * priv->tx_ring_size; |
191 | priv->rx_bd_base = vaddr; | |
826aa4a0 AV |
192 | |
193 | /* Setup the skbuff rings */ | |
194 | priv->tx_skbuff = kmalloc(sizeof(*priv->tx_skbuff) * | |
195 | priv->tx_ring_size, GFP_KERNEL); | |
196 | if (!priv->tx_skbuff) { | |
197 | if (netif_msg_ifup(priv)) | |
198 | pr_err("%s: Could not allocate tx_skbuff\n", | |
199 | ndev->name); | |
200 | goto cleanup; | |
201 | } | |
202 | ||
203 | for (i = 0; i < priv->tx_ring_size; i++) | |
204 | priv->tx_skbuff[i] = NULL; | |
205 | ||
206 | priv->rx_skbuff = kmalloc(sizeof(*priv->rx_skbuff) * | |
207 | priv->rx_ring_size, GFP_KERNEL); | |
208 | if (!priv->rx_skbuff) { | |
209 | if (netif_msg_ifup(priv)) | |
210 | pr_err("%s: Could not allocate rx_skbuff\n", | |
211 | ndev->name); | |
212 | goto cleanup; | |
213 | } | |
214 | ||
215 | for (i = 0; i < priv->rx_ring_size; i++) | |
216 | priv->rx_skbuff[i] = NULL; | |
217 | ||
218 | /* Initialize some variables in our dev structure */ | |
219 | priv->num_txbdfree = priv->tx_ring_size; | |
220 | priv->dirty_tx = priv->cur_tx = priv->tx_bd_base; | |
221 | priv->cur_rx = priv->rx_bd_base; | |
222 | priv->skb_curtx = priv->skb_dirtytx = 0; | |
223 | priv->skb_currx = 0; | |
224 | ||
225 | /* Initialize Transmit Descriptor Ring */ | |
226 | txbdp = priv->tx_bd_base; | |
227 | for (i = 0; i < priv->tx_ring_size; i++) { | |
228 | txbdp->lstatus = 0; | |
229 | txbdp->bufPtr = 0; | |
230 | txbdp++; | |
231 | } | |
232 | ||
233 | /* Set the last descriptor in the ring to indicate wrap */ | |
234 | txbdp--; | |
235 | txbdp->status |= TXBD_WRAP; | |
236 | ||
237 | rxbdp = priv->rx_bd_base; | |
238 | for (i = 0; i < priv->rx_ring_size; i++) { | |
239 | struct sk_buff *skb; | |
240 | ||
241 | skb = gfar_new_skb(ndev); | |
242 | if (!skb) { | |
243 | pr_err("%s: Can't allocate RX buffers\n", ndev->name); | |
244 | goto cleanup; | |
245 | } | |
246 | ||
247 | priv->rx_skbuff[i] = skb; | |
248 | ||
249 | gfar_new_rxbdp(ndev, rxbdp, skb); | |
250 | ||
251 | rxbdp++; | |
252 | } | |
253 | ||
254 | return 0; | |
255 | ||
256 | cleanup: | |
257 | free_skb_resources(priv); | |
258 | return -ENOMEM; | |
259 | } | |
260 | ||
261 | static void gfar_init_mac(struct net_device *ndev) | |
262 | { | |
263 | struct gfar_private *priv = netdev_priv(ndev); | |
264 | struct gfar __iomem *regs = priv->regs; | |
265 | u32 rctrl = 0; | |
266 | u32 tctrl = 0; | |
267 | u32 attrs = 0; | |
268 | ||
32c513bc AV |
269 | /* enet DMA only understands physical addresses */ |
270 | gfar_write(®s->tbase0, priv->tx_bd_dma_base); | |
271 | gfar_write(®s->rbase0, priv->tx_bd_dma_base + | |
272 | sizeof(*priv->tx_bd_base) * | |
273 | priv->tx_ring_size); | |
274 | ||
826aa4a0 AV |
275 | /* Configure the coalescing support */ |
276 | gfar_write(®s->txic, 0); | |
277 | if (priv->txcoalescing) | |
278 | gfar_write(®s->txic, priv->txic); | |
279 | ||
280 | gfar_write(®s->rxic, 0); | |
281 | if (priv->rxcoalescing) | |
282 | gfar_write(®s->rxic, priv->rxic); | |
283 | ||
284 | if (priv->rx_csum_enable) | |
285 | rctrl |= RCTRL_CHECKSUMMING; | |
286 | ||
287 | if (priv->extended_hash) { | |
288 | rctrl |= RCTRL_EXTHASH; | |
289 | ||
290 | gfar_clear_exact_match(ndev); | |
291 | rctrl |= RCTRL_EMEN; | |
292 | } | |
293 | ||
294 | if (priv->padding) { | |
295 | rctrl &= ~RCTRL_PAL_MASK; | |
296 | rctrl |= RCTRL_PADDING(priv->padding); | |
297 | } | |
298 | ||
299 | /* keep vlan related bits if it's enabled */ | |
300 | if (priv->vlgrp) { | |
301 | rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT; | |
302 | tctrl |= TCTRL_VLINS; | |
303 | } | |
304 | ||
305 | /* Init rctrl based on our settings */ | |
306 | gfar_write(®s->rctrl, rctrl); | |
307 | ||
308 | if (ndev->features & NETIF_F_IP_CSUM) | |
309 | tctrl |= TCTRL_INIT_CSUM; | |
310 | ||
311 | gfar_write(®s->tctrl, tctrl); | |
312 | ||
313 | /* Set the extraction length and index */ | |
314 | attrs = ATTRELI_EL(priv->rx_stash_size) | | |
315 | ATTRELI_EI(priv->rx_stash_index); | |
316 | ||
317 | gfar_write(®s->attreli, attrs); | |
318 | ||
319 | /* Start with defaults, and add stashing or locking | |
320 | * depending on the approprate variables */ | |
321 | attrs = ATTR_INIT_SETTINGS; | |
322 | ||
323 | if (priv->bd_stash_en) | |
324 | attrs |= ATTR_BDSTASH; | |
325 | ||
326 | if (priv->rx_stash_size != 0) | |
327 | attrs |= ATTR_BUFSTASH; | |
328 | ||
329 | gfar_write(®s->attr, attrs); | |
330 | ||
331 | gfar_write(®s->fifo_tx_thr, priv->fifo_threshold); | |
332 | gfar_write(®s->fifo_tx_starve, priv->fifo_starve); | |
333 | gfar_write(®s->fifo_tx_starve_shutoff, priv->fifo_starve_off); | |
334 | } | |
335 | ||
26ccfc37 AF |
336 | static const struct net_device_ops gfar_netdev_ops = { |
337 | .ndo_open = gfar_enet_open, | |
338 | .ndo_start_xmit = gfar_start_xmit, | |
339 | .ndo_stop = gfar_close, | |
340 | .ndo_change_mtu = gfar_change_mtu, | |
341 | .ndo_set_multicast_list = gfar_set_multi, | |
342 | .ndo_tx_timeout = gfar_timeout, | |
343 | .ndo_do_ioctl = gfar_ioctl, | |
344 | .ndo_vlan_rx_register = gfar_vlan_rx_register, | |
240c102d BH |
345 | .ndo_set_mac_address = eth_mac_addr, |
346 | .ndo_validate_addr = eth_validate_addr, | |
26ccfc37 AF |
347 | #ifdef CONFIG_NET_POLL_CONTROLLER |
348 | .ndo_poll_controller = gfar_netpoll, | |
349 | #endif | |
350 | }; | |
351 | ||
7f7f5316 AF |
352 | /* Returns 1 if incoming frames use an FCB */ |
353 | static inline int gfar_uses_fcb(struct gfar_private *priv) | |
0bbaf069 | 354 | { |
77ecaf2d | 355 | return priv->vlgrp || priv->rx_csum_enable; |
0bbaf069 | 356 | } |
bb40dcbb | 357 | |
b31a1d8b AF |
358 | static int gfar_of_init(struct net_device *dev) |
359 | { | |
b31a1d8b AF |
360 | const char *model; |
361 | const char *ctype; | |
362 | const void *mac_addr; | |
b31a1d8b AF |
363 | u64 addr, size; |
364 | int err = 0; | |
365 | struct gfar_private *priv = netdev_priv(dev); | |
366 | struct device_node *np = priv->node; | |
4d7902f2 AF |
367 | const u32 *stash; |
368 | const u32 *stash_len; | |
369 | const u32 *stash_idx; | |
b31a1d8b AF |
370 | |
371 | if (!np || !of_device_is_available(np)) | |
372 | return -ENODEV; | |
373 | ||
374 | /* get a pointer to the register memory */ | |
375 | addr = of_translate_address(np, of_get_address(np, 0, &size, NULL)); | |
376 | priv->regs = ioremap(addr, size); | |
377 | ||
378 | if (priv->regs == NULL) | |
379 | return -ENOMEM; | |
380 | ||
381 | priv->interruptTransmit = irq_of_parse_and_map(np, 0); | |
382 | ||
383 | model = of_get_property(np, "model", NULL); | |
384 | ||
385 | /* If we aren't the FEC we have multiple interrupts */ | |
386 | if (model && strcasecmp(model, "FEC")) { | |
387 | priv->interruptReceive = irq_of_parse_and_map(np, 1); | |
388 | ||
389 | priv->interruptError = irq_of_parse_and_map(np, 2); | |
390 | ||
391 | if (priv->interruptTransmit < 0 || | |
392 | priv->interruptReceive < 0 || | |
393 | priv->interruptError < 0) { | |
394 | err = -EINVAL; | |
395 | goto err_out; | |
396 | } | |
397 | } | |
398 | ||
4d7902f2 AF |
399 | stash = of_get_property(np, "bd-stash", NULL); |
400 | ||
401 | if(stash) { | |
402 | priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING; | |
403 | priv->bd_stash_en = 1; | |
404 | } | |
405 | ||
406 | stash_len = of_get_property(np, "rx-stash-len", NULL); | |
407 | ||
408 | if (stash_len) | |
409 | priv->rx_stash_size = *stash_len; | |
410 | ||
411 | stash_idx = of_get_property(np, "rx-stash-idx", NULL); | |
412 | ||
413 | if (stash_idx) | |
414 | priv->rx_stash_index = *stash_idx; | |
415 | ||
416 | if (stash_len || stash_idx) | |
417 | priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING; | |
418 | ||
b31a1d8b AF |
419 | mac_addr = of_get_mac_address(np); |
420 | if (mac_addr) | |
421 | memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN); | |
422 | ||
423 | if (model && !strcasecmp(model, "TSEC")) | |
424 | priv->device_flags = | |
425 | FSL_GIANFAR_DEV_HAS_GIGABIT | | |
426 | FSL_GIANFAR_DEV_HAS_COALESCE | | |
427 | FSL_GIANFAR_DEV_HAS_RMON | | |
428 | FSL_GIANFAR_DEV_HAS_MULTI_INTR; | |
429 | if (model && !strcasecmp(model, "eTSEC")) | |
430 | priv->device_flags = | |
431 | FSL_GIANFAR_DEV_HAS_GIGABIT | | |
432 | FSL_GIANFAR_DEV_HAS_COALESCE | | |
433 | FSL_GIANFAR_DEV_HAS_RMON | | |
434 | FSL_GIANFAR_DEV_HAS_MULTI_INTR | | |
2c2db48a | 435 | FSL_GIANFAR_DEV_HAS_PADDING | |
b31a1d8b AF |
436 | FSL_GIANFAR_DEV_HAS_CSUM | |
437 | FSL_GIANFAR_DEV_HAS_VLAN | | |
438 | FSL_GIANFAR_DEV_HAS_MAGIC_PACKET | | |
439 | FSL_GIANFAR_DEV_HAS_EXTENDED_HASH; | |
440 | ||
441 | ctype = of_get_property(np, "phy-connection-type", NULL); | |
442 | ||
443 | /* We only care about rgmii-id. The rest are autodetected */ | |
444 | if (ctype && !strcmp(ctype, "rgmii-id")) | |
445 | priv->interface = PHY_INTERFACE_MODE_RGMII_ID; | |
446 | else | |
447 | priv->interface = PHY_INTERFACE_MODE_MII; | |
448 | ||
449 | if (of_get_property(np, "fsl,magic-packet", NULL)) | |
450 | priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET; | |
451 | ||
fe192a49 | 452 | priv->phy_node = of_parse_phandle(np, "phy-handle", 0); |
b31a1d8b AF |
453 | |
454 | /* Find the TBI PHY. If it's not there, we don't support SGMII */ | |
fe192a49 | 455 | priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0); |
b31a1d8b AF |
456 | |
457 | return 0; | |
458 | ||
459 | err_out: | |
460 | iounmap(priv->regs); | |
461 | return err; | |
462 | } | |
463 | ||
0faac9f7 CW |
464 | /* Ioctl MII Interface */ |
465 | static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
466 | { | |
467 | struct gfar_private *priv = netdev_priv(dev); | |
468 | ||
469 | if (!netif_running(dev)) | |
470 | return -EINVAL; | |
471 | ||
472 | if (!priv->phydev) | |
473 | return -ENODEV; | |
474 | ||
475 | return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd); | |
476 | } | |
477 | ||
bb40dcbb AF |
478 | /* Set up the ethernet device structure, private data, |
479 | * and anything else we need before we start */ | |
b31a1d8b AF |
480 | static int gfar_probe(struct of_device *ofdev, |
481 | const struct of_device_id *match) | |
1da177e4 LT |
482 | { |
483 | u32 tempval; | |
484 | struct net_device *dev = NULL; | |
485 | struct gfar_private *priv = NULL; | |
c50a5d9a DH |
486 | int err = 0; |
487 | int len_devname; | |
1da177e4 LT |
488 | |
489 | /* Create an ethernet device instance */ | |
490 | dev = alloc_etherdev(sizeof (*priv)); | |
491 | ||
bb40dcbb | 492 | if (NULL == dev) |
1da177e4 LT |
493 | return -ENOMEM; |
494 | ||
495 | priv = netdev_priv(dev); | |
4826857f KG |
496 | priv->ndev = dev; |
497 | priv->ofdev = ofdev; | |
b31a1d8b | 498 | priv->node = ofdev->node; |
4826857f | 499 | SET_NETDEV_DEV(dev, &ofdev->dev); |
1da177e4 | 500 | |
b31a1d8b | 501 | err = gfar_of_init(dev); |
1da177e4 | 502 | |
b31a1d8b | 503 | if (err) |
1da177e4 | 504 | goto regs_fail; |
1da177e4 | 505 | |
fef6108d AF |
506 | spin_lock_init(&priv->txlock); |
507 | spin_lock_init(&priv->rxlock); | |
d87eb127 | 508 | spin_lock_init(&priv->bflock); |
ab939905 | 509 | INIT_WORK(&priv->reset_task, gfar_reset_task); |
1da177e4 | 510 | |
b31a1d8b | 511 | dev_set_drvdata(&ofdev->dev, priv); |
1da177e4 LT |
512 | |
513 | /* Stop the DMA engine now, in case it was running before */ | |
514 | /* (The firmware could have used it, and left it running). */ | |
257d938a | 515 | gfar_halt(dev); |
1da177e4 LT |
516 | |
517 | /* Reset MAC layer */ | |
518 | gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET); | |
519 | ||
b98ac702 AF |
520 | /* We need to delay at least 3 TX clocks */ |
521 | udelay(2); | |
522 | ||
1da177e4 LT |
523 | tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW); |
524 | gfar_write(&priv->regs->maccfg1, tempval); | |
525 | ||
526 | /* Initialize MACCFG2. */ | |
527 | gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS); | |
528 | ||
529 | /* Initialize ECNTRL */ | |
530 | gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS); | |
531 | ||
1da177e4 LT |
532 | /* Set the dev->base_addr to the gfar reg region */ |
533 | dev->base_addr = (unsigned long) (priv->regs); | |
534 | ||
b31a1d8b | 535 | SET_NETDEV_DEV(dev, &ofdev->dev); |
1da177e4 LT |
536 | |
537 | /* Fill in the dev structure */ | |
1da177e4 | 538 | dev->watchdog_timeo = TX_TIMEOUT; |
bea3348e | 539 | netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT); |
1da177e4 | 540 | dev->mtu = 1500; |
1da177e4 | 541 | |
26ccfc37 | 542 | dev->netdev_ops = &gfar_netdev_ops; |
0bbaf069 KG |
543 | dev->ethtool_ops = &gfar_ethtool_ops; |
544 | ||
b31a1d8b | 545 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) { |
0bbaf069 | 546 | priv->rx_csum_enable = 1; |
4669bc90 | 547 | dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA; |
0bbaf069 KG |
548 | } else |
549 | priv->rx_csum_enable = 0; | |
550 | ||
551 | priv->vlgrp = NULL; | |
1da177e4 | 552 | |
26ccfc37 | 553 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) |
0bbaf069 | 554 | dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; |
0bbaf069 | 555 | |
b31a1d8b | 556 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) { |
0bbaf069 KG |
557 | priv->extended_hash = 1; |
558 | priv->hash_width = 9; | |
559 | ||
560 | priv->hash_regs[0] = &priv->regs->igaddr0; | |
561 | priv->hash_regs[1] = &priv->regs->igaddr1; | |
562 | priv->hash_regs[2] = &priv->regs->igaddr2; | |
563 | priv->hash_regs[3] = &priv->regs->igaddr3; | |
564 | priv->hash_regs[4] = &priv->regs->igaddr4; | |
565 | priv->hash_regs[5] = &priv->regs->igaddr5; | |
566 | priv->hash_regs[6] = &priv->regs->igaddr6; | |
567 | priv->hash_regs[7] = &priv->regs->igaddr7; | |
568 | priv->hash_regs[8] = &priv->regs->gaddr0; | |
569 | priv->hash_regs[9] = &priv->regs->gaddr1; | |
570 | priv->hash_regs[10] = &priv->regs->gaddr2; | |
571 | priv->hash_regs[11] = &priv->regs->gaddr3; | |
572 | priv->hash_regs[12] = &priv->regs->gaddr4; | |
573 | priv->hash_regs[13] = &priv->regs->gaddr5; | |
574 | priv->hash_regs[14] = &priv->regs->gaddr6; | |
575 | priv->hash_regs[15] = &priv->regs->gaddr7; | |
576 | ||
577 | } else { | |
578 | priv->extended_hash = 0; | |
579 | priv->hash_width = 8; | |
580 | ||
581 | priv->hash_regs[0] = &priv->regs->gaddr0; | |
1577ecef | 582 | priv->hash_regs[1] = &priv->regs->gaddr1; |
0bbaf069 KG |
583 | priv->hash_regs[2] = &priv->regs->gaddr2; |
584 | priv->hash_regs[3] = &priv->regs->gaddr3; | |
585 | priv->hash_regs[4] = &priv->regs->gaddr4; | |
586 | priv->hash_regs[5] = &priv->regs->gaddr5; | |
587 | priv->hash_regs[6] = &priv->regs->gaddr6; | |
588 | priv->hash_regs[7] = &priv->regs->gaddr7; | |
589 | } | |
590 | ||
b31a1d8b | 591 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING) |
0bbaf069 KG |
592 | priv->padding = DEFAULT_PADDING; |
593 | else | |
594 | priv->padding = 0; | |
595 | ||
0bbaf069 KG |
596 | if (dev->features & NETIF_F_IP_CSUM) |
597 | dev->hard_header_len += GMAC_FCB_LEN; | |
1da177e4 LT |
598 | |
599 | priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE; | |
1da177e4 LT |
600 | priv->tx_ring_size = DEFAULT_TX_RING_SIZE; |
601 | priv->rx_ring_size = DEFAULT_RX_RING_SIZE; | |
4669bc90 | 602 | priv->num_txbdfree = DEFAULT_TX_RING_SIZE; |
1da177e4 LT |
603 | |
604 | priv->txcoalescing = DEFAULT_TX_COALESCE; | |
b46a8454 | 605 | priv->txic = DEFAULT_TXIC; |
1da177e4 | 606 | priv->rxcoalescing = DEFAULT_RX_COALESCE; |
b46a8454 | 607 | priv->rxic = DEFAULT_RXIC; |
1da177e4 | 608 | |
0bbaf069 KG |
609 | /* Enable most messages by default */ |
610 | priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; | |
611 | ||
d3eab82b TP |
612 | /* Carrier starts down, phylib will bring it up */ |
613 | netif_carrier_off(dev); | |
614 | ||
1da177e4 LT |
615 | err = register_netdev(dev); |
616 | ||
617 | if (err) { | |
618 | printk(KERN_ERR "%s: Cannot register net device, aborting.\n", | |
619 | dev->name); | |
620 | goto register_fail; | |
621 | } | |
622 | ||
2884e5cc AV |
623 | device_init_wakeup(&dev->dev, |
624 | priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); | |
625 | ||
c50a5d9a DH |
626 | /* fill out IRQ number and name fields */ |
627 | len_devname = strlen(dev->name); | |
628 | strncpy(&priv->int_name_tx[0], dev->name, len_devname); | |
629 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
630 | strncpy(&priv->int_name_tx[len_devname], | |
631 | "_tx", sizeof("_tx") + 1); | |
632 | ||
633 | strncpy(&priv->int_name_rx[0], dev->name, len_devname); | |
634 | strncpy(&priv->int_name_rx[len_devname], | |
635 | "_rx", sizeof("_rx") + 1); | |
636 | ||
637 | strncpy(&priv->int_name_er[0], dev->name, len_devname); | |
638 | strncpy(&priv->int_name_er[len_devname], | |
639 | "_er", sizeof("_er") + 1); | |
640 | } else | |
641 | priv->int_name_tx[len_devname] = '\0'; | |
642 | ||
7f7f5316 AF |
643 | /* Create all the sysfs files */ |
644 | gfar_init_sysfs(dev); | |
645 | ||
1da177e4 | 646 | /* Print out the device info */ |
e174961c | 647 | printk(KERN_INFO DEVICE_NAME "%pM\n", dev->name, dev->dev_addr); |
1da177e4 LT |
648 | |
649 | /* Even more device info helps when determining which kernel */ | |
7f7f5316 | 650 | /* provided which set of benchmarks. */ |
1da177e4 | 651 | printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name); |
1da177e4 LT |
652 | printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n", |
653 | dev->name, priv->rx_ring_size, priv->tx_ring_size); | |
654 | ||
655 | return 0; | |
656 | ||
657 | register_fail: | |
cc8c6e37 | 658 | iounmap(priv->regs); |
1da177e4 | 659 | regs_fail: |
fe192a49 GL |
660 | if (priv->phy_node) |
661 | of_node_put(priv->phy_node); | |
662 | if (priv->tbi_node) | |
663 | of_node_put(priv->tbi_node); | |
1da177e4 | 664 | free_netdev(dev); |
bb40dcbb | 665 | return err; |
1da177e4 LT |
666 | } |
667 | ||
b31a1d8b | 668 | static int gfar_remove(struct of_device *ofdev) |
1da177e4 | 669 | { |
b31a1d8b | 670 | struct gfar_private *priv = dev_get_drvdata(&ofdev->dev); |
1da177e4 | 671 | |
fe192a49 GL |
672 | if (priv->phy_node) |
673 | of_node_put(priv->phy_node); | |
674 | if (priv->tbi_node) | |
675 | of_node_put(priv->tbi_node); | |
676 | ||
b31a1d8b | 677 | dev_set_drvdata(&ofdev->dev, NULL); |
1da177e4 | 678 | |
d9d8e041 | 679 | unregister_netdev(priv->ndev); |
cc8c6e37 | 680 | iounmap(priv->regs); |
4826857f | 681 | free_netdev(priv->ndev); |
1da177e4 LT |
682 | |
683 | return 0; | |
684 | } | |
685 | ||
d87eb127 | 686 | #ifdef CONFIG_PM |
b31a1d8b | 687 | static int gfar_suspend(struct of_device *ofdev, pm_message_t state) |
d87eb127 | 688 | { |
b31a1d8b | 689 | struct gfar_private *priv = dev_get_drvdata(&ofdev->dev); |
29ded5f7 | 690 | struct net_device *dev = priv->ndev; |
d87eb127 SW |
691 | unsigned long flags; |
692 | u32 tempval; | |
693 | ||
694 | int magic_packet = priv->wol_en && | |
b31a1d8b | 695 | (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); |
d87eb127 SW |
696 | |
697 | netif_device_detach(dev); | |
698 | ||
699 | if (netif_running(dev)) { | |
700 | spin_lock_irqsave(&priv->txlock, flags); | |
701 | spin_lock(&priv->rxlock); | |
702 | ||
703 | gfar_halt_nodisable(dev); | |
704 | ||
705 | /* Disable Tx, and Rx if wake-on-LAN is disabled. */ | |
706 | tempval = gfar_read(&priv->regs->maccfg1); | |
707 | ||
708 | tempval &= ~MACCFG1_TX_EN; | |
709 | ||
710 | if (!magic_packet) | |
711 | tempval &= ~MACCFG1_RX_EN; | |
712 | ||
713 | gfar_write(&priv->regs->maccfg1, tempval); | |
714 | ||
715 | spin_unlock(&priv->rxlock); | |
716 | spin_unlock_irqrestore(&priv->txlock, flags); | |
717 | ||
d87eb127 | 718 | napi_disable(&priv->napi); |
d87eb127 SW |
719 | |
720 | if (magic_packet) { | |
721 | /* Enable interrupt on Magic Packet */ | |
722 | gfar_write(&priv->regs->imask, IMASK_MAG); | |
723 | ||
724 | /* Enable Magic Packet mode */ | |
725 | tempval = gfar_read(&priv->regs->maccfg2); | |
726 | tempval |= MACCFG2_MPEN; | |
727 | gfar_write(&priv->regs->maccfg2, tempval); | |
728 | } else { | |
729 | phy_stop(priv->phydev); | |
730 | } | |
731 | } | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
b31a1d8b | 736 | static int gfar_resume(struct of_device *ofdev) |
d87eb127 | 737 | { |
b31a1d8b | 738 | struct gfar_private *priv = dev_get_drvdata(&ofdev->dev); |
29ded5f7 | 739 | struct net_device *dev = priv->ndev; |
d87eb127 SW |
740 | unsigned long flags; |
741 | u32 tempval; | |
742 | int magic_packet = priv->wol_en && | |
b31a1d8b | 743 | (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); |
d87eb127 SW |
744 | |
745 | if (!netif_running(dev)) { | |
746 | netif_device_attach(dev); | |
747 | return 0; | |
748 | } | |
749 | ||
750 | if (!magic_packet && priv->phydev) | |
751 | phy_start(priv->phydev); | |
752 | ||
753 | /* Disable Magic Packet mode, in case something | |
754 | * else woke us up. | |
755 | */ | |
756 | ||
757 | spin_lock_irqsave(&priv->txlock, flags); | |
758 | spin_lock(&priv->rxlock); | |
759 | ||
760 | tempval = gfar_read(&priv->regs->maccfg2); | |
761 | tempval &= ~MACCFG2_MPEN; | |
762 | gfar_write(&priv->regs->maccfg2, tempval); | |
763 | ||
764 | gfar_start(dev); | |
765 | ||
766 | spin_unlock(&priv->rxlock); | |
767 | spin_unlock_irqrestore(&priv->txlock, flags); | |
768 | ||
769 | netif_device_attach(dev); | |
770 | ||
d87eb127 | 771 | napi_enable(&priv->napi); |
d87eb127 SW |
772 | |
773 | return 0; | |
774 | } | |
775 | #else | |
776 | #define gfar_suspend NULL | |
777 | #define gfar_resume NULL | |
778 | #endif | |
1da177e4 | 779 | |
e8a2b6a4 AF |
780 | /* Reads the controller's registers to determine what interface |
781 | * connects it to the PHY. | |
782 | */ | |
783 | static phy_interface_t gfar_get_interface(struct net_device *dev) | |
784 | { | |
785 | struct gfar_private *priv = netdev_priv(dev); | |
786 | u32 ecntrl = gfar_read(&priv->regs->ecntrl); | |
787 | ||
788 | if (ecntrl & ECNTRL_SGMII_MODE) | |
789 | return PHY_INTERFACE_MODE_SGMII; | |
790 | ||
791 | if (ecntrl & ECNTRL_TBI_MODE) { | |
792 | if (ecntrl & ECNTRL_REDUCED_MODE) | |
793 | return PHY_INTERFACE_MODE_RTBI; | |
794 | else | |
795 | return PHY_INTERFACE_MODE_TBI; | |
796 | } | |
797 | ||
798 | if (ecntrl & ECNTRL_REDUCED_MODE) { | |
799 | if (ecntrl & ECNTRL_REDUCED_MII_MODE) | |
800 | return PHY_INTERFACE_MODE_RMII; | |
7132ab7f | 801 | else { |
b31a1d8b | 802 | phy_interface_t interface = priv->interface; |
7132ab7f AF |
803 | |
804 | /* | |
805 | * This isn't autodetected right now, so it must | |
806 | * be set by the device tree or platform code. | |
807 | */ | |
808 | if (interface == PHY_INTERFACE_MODE_RGMII_ID) | |
809 | return PHY_INTERFACE_MODE_RGMII_ID; | |
810 | ||
e8a2b6a4 | 811 | return PHY_INTERFACE_MODE_RGMII; |
7132ab7f | 812 | } |
e8a2b6a4 AF |
813 | } |
814 | ||
b31a1d8b | 815 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT) |
e8a2b6a4 AF |
816 | return PHY_INTERFACE_MODE_GMII; |
817 | ||
818 | return PHY_INTERFACE_MODE_MII; | |
819 | } | |
820 | ||
821 | ||
bb40dcbb AF |
822 | /* Initializes driver's PHY state, and attaches to the PHY. |
823 | * Returns 0 on success. | |
1da177e4 LT |
824 | */ |
825 | static int init_phy(struct net_device *dev) | |
826 | { | |
827 | struct gfar_private *priv = netdev_priv(dev); | |
bb40dcbb | 828 | uint gigabit_support = |
b31a1d8b | 829 | priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ? |
bb40dcbb | 830 | SUPPORTED_1000baseT_Full : 0; |
e8a2b6a4 | 831 | phy_interface_t interface; |
1da177e4 LT |
832 | |
833 | priv->oldlink = 0; | |
834 | priv->oldspeed = 0; | |
835 | priv->oldduplex = -1; | |
836 | ||
e8a2b6a4 AF |
837 | interface = gfar_get_interface(dev); |
838 | ||
1db780f8 AV |
839 | priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0, |
840 | interface); | |
841 | if (!priv->phydev) | |
842 | priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link, | |
843 | interface); | |
844 | if (!priv->phydev) { | |
845 | dev_err(&dev->dev, "could not attach to PHY\n"); | |
846 | return -ENODEV; | |
fe192a49 | 847 | } |
1da177e4 | 848 | |
d3c12873 KJ |
849 | if (interface == PHY_INTERFACE_MODE_SGMII) |
850 | gfar_configure_serdes(dev); | |
851 | ||
bb40dcbb | 852 | /* Remove any features not supported by the controller */ |
fe192a49 GL |
853 | priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support); |
854 | priv->phydev->advertising = priv->phydev->supported; | |
1da177e4 LT |
855 | |
856 | return 0; | |
1da177e4 LT |
857 | } |
858 | ||
d0313587 PG |
859 | /* |
860 | * Initialize TBI PHY interface for communicating with the | |
861 | * SERDES lynx PHY on the chip. We communicate with this PHY | |
862 | * through the MDIO bus on each controller, treating it as a | |
863 | * "normal" PHY at the address found in the TBIPA register. We assume | |
864 | * that the TBIPA register is valid. Either the MDIO bus code will set | |
865 | * it to a value that doesn't conflict with other PHYs on the bus, or the | |
866 | * value doesn't matter, as there are no other PHYs on the bus. | |
867 | */ | |
d3c12873 KJ |
868 | static void gfar_configure_serdes(struct net_device *dev) |
869 | { | |
870 | struct gfar_private *priv = netdev_priv(dev); | |
fe192a49 GL |
871 | struct phy_device *tbiphy; |
872 | ||
873 | if (!priv->tbi_node) { | |
874 | dev_warn(&dev->dev, "error: SGMII mode requires that the " | |
875 | "device tree specify a tbi-handle\n"); | |
876 | return; | |
877 | } | |
c132419e | 878 | |
fe192a49 GL |
879 | tbiphy = of_phy_find_device(priv->tbi_node); |
880 | if (!tbiphy) { | |
881 | dev_err(&dev->dev, "error: Could not get TBI device\n"); | |
b31a1d8b AF |
882 | return; |
883 | } | |
d3c12873 | 884 | |
b31a1d8b AF |
885 | /* |
886 | * If the link is already up, we must already be ok, and don't need to | |
bdb59f94 TP |
887 | * configure and reset the TBI<->SerDes link. Maybe U-Boot configured |
888 | * everything for us? Resetting it takes the link down and requires | |
889 | * several seconds for it to come back. | |
890 | */ | |
fe192a49 | 891 | if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS) |
b31a1d8b | 892 | return; |
d3c12873 | 893 | |
d0313587 | 894 | /* Single clk mode, mii mode off(for serdes communication) */ |
fe192a49 | 895 | phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT); |
d3c12873 | 896 | |
fe192a49 | 897 | phy_write(tbiphy, MII_ADVERTISE, |
d3c12873 KJ |
898 | ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | |
899 | ADVERTISE_1000XPSE_ASYM); | |
900 | ||
fe192a49 | 901 | phy_write(tbiphy, MII_BMCR, BMCR_ANENABLE | |
d3c12873 KJ |
902 | BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000); |
903 | } | |
904 | ||
1da177e4 LT |
905 | static void init_registers(struct net_device *dev) |
906 | { | |
907 | struct gfar_private *priv = netdev_priv(dev); | |
908 | ||
909 | /* Clear IEVENT */ | |
910 | gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR); | |
911 | ||
912 | /* Initialize IMASK */ | |
913 | gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR); | |
914 | ||
915 | /* Init hash registers to zero */ | |
0bbaf069 KG |
916 | gfar_write(&priv->regs->igaddr0, 0); |
917 | gfar_write(&priv->regs->igaddr1, 0); | |
918 | gfar_write(&priv->regs->igaddr2, 0); | |
919 | gfar_write(&priv->regs->igaddr3, 0); | |
920 | gfar_write(&priv->regs->igaddr4, 0); | |
921 | gfar_write(&priv->regs->igaddr5, 0); | |
922 | gfar_write(&priv->regs->igaddr6, 0); | |
923 | gfar_write(&priv->regs->igaddr7, 0); | |
1da177e4 LT |
924 | |
925 | gfar_write(&priv->regs->gaddr0, 0); | |
926 | gfar_write(&priv->regs->gaddr1, 0); | |
927 | gfar_write(&priv->regs->gaddr2, 0); | |
928 | gfar_write(&priv->regs->gaddr3, 0); | |
929 | gfar_write(&priv->regs->gaddr4, 0); | |
930 | gfar_write(&priv->regs->gaddr5, 0); | |
931 | gfar_write(&priv->regs->gaddr6, 0); | |
932 | gfar_write(&priv->regs->gaddr7, 0); | |
933 | ||
1da177e4 | 934 | /* Zero out the rmon mib registers if it has them */ |
b31a1d8b | 935 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { |
cc8c6e37 | 936 | memset_io(&(priv->regs->rmon), 0, sizeof (struct rmon_mib)); |
1da177e4 LT |
937 | |
938 | /* Mask off the CAM interrupts */ | |
939 | gfar_write(&priv->regs->rmon.cam1, 0xffffffff); | |
940 | gfar_write(&priv->regs->rmon.cam2, 0xffffffff); | |
941 | } | |
942 | ||
943 | /* Initialize the max receive buffer length */ | |
944 | gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); | |
945 | ||
1da177e4 LT |
946 | /* Initialize the Minimum Frame Length Register */ |
947 | gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS); | |
1da177e4 LT |
948 | } |
949 | ||
0bbaf069 KG |
950 | |
951 | /* Halt the receive and transmit queues */ | |
d87eb127 | 952 | static void gfar_halt_nodisable(struct net_device *dev) |
1da177e4 LT |
953 | { |
954 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 955 | struct gfar __iomem *regs = priv->regs; |
1da177e4 LT |
956 | u32 tempval; |
957 | ||
1da177e4 LT |
958 | /* Mask all interrupts */ |
959 | gfar_write(®s->imask, IMASK_INIT_CLEAR); | |
960 | ||
961 | /* Clear all interrupts */ | |
962 | gfar_write(®s->ievent, IEVENT_INIT_CLEAR); | |
963 | ||
964 | /* Stop the DMA, and wait for it to stop */ | |
965 | tempval = gfar_read(&priv->regs->dmactrl); | |
966 | if ((tempval & (DMACTRL_GRS | DMACTRL_GTS)) | |
967 | != (DMACTRL_GRS | DMACTRL_GTS)) { | |
968 | tempval |= (DMACTRL_GRS | DMACTRL_GTS); | |
969 | gfar_write(&priv->regs->dmactrl, tempval); | |
970 | ||
971 | while (!(gfar_read(&priv->regs->ievent) & | |
972 | (IEVENT_GRSC | IEVENT_GTSC))) | |
973 | cpu_relax(); | |
974 | } | |
d87eb127 | 975 | } |
d87eb127 SW |
976 | |
977 | /* Halt the receive and transmit queues */ | |
978 | void gfar_halt(struct net_device *dev) | |
979 | { | |
980 | struct gfar_private *priv = netdev_priv(dev); | |
981 | struct gfar __iomem *regs = priv->regs; | |
982 | u32 tempval; | |
1da177e4 | 983 | |
2a54adc3 SW |
984 | gfar_halt_nodisable(dev); |
985 | ||
1da177e4 LT |
986 | /* Disable Rx and Tx */ |
987 | tempval = gfar_read(®s->maccfg1); | |
988 | tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN); | |
989 | gfar_write(®s->maccfg1, tempval); | |
0bbaf069 KG |
990 | } |
991 | ||
992 | void stop_gfar(struct net_device *dev) | |
993 | { | |
994 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 KG |
995 | unsigned long flags; |
996 | ||
bb40dcbb AF |
997 | phy_stop(priv->phydev); |
998 | ||
0bbaf069 | 999 | /* Lock it down */ |
fef6108d AF |
1000 | spin_lock_irqsave(&priv->txlock, flags); |
1001 | spin_lock(&priv->rxlock); | |
0bbaf069 | 1002 | |
0bbaf069 | 1003 | gfar_halt(dev); |
1da177e4 | 1004 | |
fef6108d AF |
1005 | spin_unlock(&priv->rxlock); |
1006 | spin_unlock_irqrestore(&priv->txlock, flags); | |
1da177e4 LT |
1007 | |
1008 | /* Free the IRQs */ | |
b31a1d8b | 1009 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { |
1da177e4 LT |
1010 | free_irq(priv->interruptError, dev); |
1011 | free_irq(priv->interruptTransmit, dev); | |
1012 | free_irq(priv->interruptReceive, dev); | |
1013 | } else { | |
1577ecef | 1014 | free_irq(priv->interruptTransmit, dev); |
1da177e4 LT |
1015 | } |
1016 | ||
1017 | free_skb_resources(priv); | |
1da177e4 LT |
1018 | } |
1019 | ||
1020 | /* If there are any tx skbs or rx skbs still around, free them. | |
1021 | * Then free tx_skbuff and rx_skbuff */ | |
bb40dcbb | 1022 | static void free_skb_resources(struct gfar_private *priv) |
1da177e4 | 1023 | { |
e69edd21 | 1024 | struct device *dev = &priv->ofdev->dev; |
1da177e4 LT |
1025 | struct rxbd8 *rxbdp; |
1026 | struct txbd8 *txbdp; | |
4669bc90 | 1027 | int i, j; |
1da177e4 LT |
1028 | |
1029 | /* Go through all the buffer descriptors and free their data buffers */ | |
1030 | txbdp = priv->tx_bd_base; | |
1031 | ||
e69edd21 AV |
1032 | if (!priv->tx_skbuff) |
1033 | goto skip_tx_skbuff; | |
1034 | ||
1da177e4 | 1035 | for (i = 0; i < priv->tx_ring_size; i++) { |
4669bc90 DH |
1036 | if (!priv->tx_skbuff[i]) |
1037 | continue; | |
1da177e4 | 1038 | |
4826857f | 1039 | dma_unmap_single(&priv->ofdev->dev, txbdp->bufPtr, |
4669bc90 DH |
1040 | txbdp->length, DMA_TO_DEVICE); |
1041 | txbdp->lstatus = 0; | |
1042 | for (j = 0; j < skb_shinfo(priv->tx_skbuff[i])->nr_frags; j++) { | |
1043 | txbdp++; | |
4826857f | 1044 | dma_unmap_page(&priv->ofdev->dev, txbdp->bufPtr, |
4669bc90 | 1045 | txbdp->length, DMA_TO_DEVICE); |
1da177e4 | 1046 | } |
ad5da7ab | 1047 | txbdp++; |
4669bc90 DH |
1048 | dev_kfree_skb_any(priv->tx_skbuff[i]); |
1049 | priv->tx_skbuff[i] = NULL; | |
1da177e4 LT |
1050 | } |
1051 | ||
1052 | kfree(priv->tx_skbuff); | |
e69edd21 | 1053 | skip_tx_skbuff: |
1da177e4 LT |
1054 | |
1055 | rxbdp = priv->rx_bd_base; | |
1056 | ||
e69edd21 AV |
1057 | if (!priv->rx_skbuff) |
1058 | goto skip_rx_skbuff; | |
1da177e4 | 1059 | |
e69edd21 AV |
1060 | for (i = 0; i < priv->rx_ring_size; i++) { |
1061 | if (priv->rx_skbuff[i]) { | |
1062 | dma_unmap_single(&priv->ofdev->dev, rxbdp->bufPtr, | |
1063 | priv->rx_buffer_size, | |
1064 | DMA_FROM_DEVICE); | |
1065 | dev_kfree_skb_any(priv->rx_skbuff[i]); | |
1066 | priv->rx_skbuff[i] = NULL; | |
1da177e4 LT |
1067 | } |
1068 | ||
e69edd21 AV |
1069 | rxbdp->lstatus = 0; |
1070 | rxbdp->bufPtr = 0; | |
1071 | rxbdp++; | |
1da177e4 | 1072 | } |
e69edd21 AV |
1073 | |
1074 | kfree(priv->rx_skbuff); | |
1075 | skip_rx_skbuff: | |
1076 | ||
1077 | dma_free_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size + | |
1078 | sizeof(*rxbdp) * priv->rx_ring_size, | |
32c513bc | 1079 | priv->tx_bd_base, priv->tx_bd_dma_base); |
1da177e4 LT |
1080 | } |
1081 | ||
0bbaf069 KG |
1082 | void gfar_start(struct net_device *dev) |
1083 | { | |
1084 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 1085 | struct gfar __iomem *regs = priv->regs; |
0bbaf069 KG |
1086 | u32 tempval; |
1087 | ||
1088 | /* Enable Rx and Tx in MACCFG1 */ | |
1089 | tempval = gfar_read(®s->maccfg1); | |
1090 | tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN); | |
1091 | gfar_write(®s->maccfg1, tempval); | |
1092 | ||
1093 | /* Initialize DMACTRL to have WWR and WOP */ | |
1094 | tempval = gfar_read(&priv->regs->dmactrl); | |
1095 | tempval |= DMACTRL_INIT_SETTINGS; | |
1096 | gfar_write(&priv->regs->dmactrl, tempval); | |
1097 | ||
0bbaf069 KG |
1098 | /* Make sure we aren't stopped */ |
1099 | tempval = gfar_read(&priv->regs->dmactrl); | |
1100 | tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); | |
1101 | gfar_write(&priv->regs->dmactrl, tempval); | |
1102 | ||
fef6108d AF |
1103 | /* Clear THLT/RHLT, so that the DMA starts polling now */ |
1104 | gfar_write(®s->tstat, TSTAT_CLEAR_THALT); | |
1105 | gfar_write(®s->rstat, RSTAT_CLEAR_RHALT); | |
1106 | ||
0bbaf069 KG |
1107 | /* Unmask the interrupts we look for */ |
1108 | gfar_write(®s->imask, IMASK_DEFAULT); | |
12dea57b DH |
1109 | |
1110 | dev->trans_start = jiffies; | |
0bbaf069 KG |
1111 | } |
1112 | ||
1da177e4 | 1113 | /* Bring the controller up and running */ |
ccc05c6e | 1114 | int startup_gfar(struct net_device *ndev) |
1da177e4 | 1115 | { |
ccc05c6e | 1116 | struct gfar_private *priv = netdev_priv(ndev); |
cc8c6e37 | 1117 | struct gfar __iomem *regs = priv->regs; |
ccc05c6e | 1118 | int err; |
1da177e4 LT |
1119 | |
1120 | gfar_write(®s->imask, IMASK_INIT_CLEAR); | |
1121 | ||
826aa4a0 AV |
1122 | err = gfar_alloc_skb_resources(ndev); |
1123 | if (err) | |
1124 | return err; | |
815b97c6 | 1125 | |
826aa4a0 | 1126 | gfar_init_mac(ndev); |
1da177e4 | 1127 | |
1da177e4 LT |
1128 | /* If the device has multiple interrupts, register for |
1129 | * them. Otherwise, only register for the one */ | |
b31a1d8b | 1130 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { |
0bbaf069 | 1131 | /* Install our interrupt handlers for Error, |
1da177e4 | 1132 | * Transmit, and Receive */ |
ccc05c6e AV |
1133 | err = request_irq(priv->interruptError, gfar_error, 0, |
1134 | priv->int_name_er, ndev); | |
1135 | if (err) { | |
0bbaf069 | 1136 | if (netif_msg_intr(priv)) |
ccc05c6e AV |
1137 | pr_err("%s: Can't get IRQ %d\n", ndev->name, |
1138 | priv->interruptError); | |
1da177e4 LT |
1139 | goto err_irq_fail; |
1140 | } | |
1141 | ||
ccc05c6e AV |
1142 | err = request_irq(priv->interruptTransmit, gfar_transmit, 0, |
1143 | priv->int_name_tx, ndev); | |
1144 | if (err) { | |
0bbaf069 | 1145 | if (netif_msg_intr(priv)) |
ccc05c6e AV |
1146 | pr_err("%s: Can't get IRQ %d\n", ndev->name, |
1147 | priv->interruptTransmit); | |
1da177e4 LT |
1148 | goto tx_irq_fail; |
1149 | } | |
1150 | ||
ccc05c6e AV |
1151 | err = request_irq(priv->interruptReceive, gfar_receive, 0, |
1152 | priv->int_name_rx, ndev); | |
1153 | if (err) { | |
0bbaf069 | 1154 | if (netif_msg_intr(priv)) |
ccc05c6e AV |
1155 | pr_err("%s: Can't get IRQ %d (receive0)\n", |
1156 | ndev->name, priv->interruptReceive); | |
1da177e4 LT |
1157 | goto rx_irq_fail; |
1158 | } | |
1159 | } else { | |
ccc05c6e AV |
1160 | err = request_irq(priv->interruptTransmit, gfar_interrupt, |
1161 | 0, priv->int_name_tx, ndev); | |
1162 | if (err) { | |
0bbaf069 | 1163 | if (netif_msg_intr(priv)) |
ccc05c6e AV |
1164 | pr_err("%s: Can't get IRQ %d\n", ndev->name, |
1165 | priv->interruptTransmit); | |
1da177e4 LT |
1166 | goto err_irq_fail; |
1167 | } | |
1168 | } | |
1169 | ||
7f7f5316 | 1170 | /* Start the controller */ |
ccc05c6e | 1171 | gfar_start(ndev); |
1da177e4 | 1172 | |
826aa4a0 AV |
1173 | phy_start(priv->phydev); |
1174 | ||
1da177e4 LT |
1175 | return 0; |
1176 | ||
1177 | rx_irq_fail: | |
ccc05c6e | 1178 | free_irq(priv->interruptTransmit, ndev); |
1da177e4 | 1179 | tx_irq_fail: |
ccc05c6e | 1180 | free_irq(priv->interruptError, ndev); |
1da177e4 | 1181 | err_irq_fail: |
e69edd21 | 1182 | free_skb_resources(priv); |
1da177e4 LT |
1183 | return err; |
1184 | } | |
1185 | ||
1186 | /* Called when something needs to use the ethernet device */ | |
1187 | /* Returns 0 for success. */ | |
1188 | static int gfar_enet_open(struct net_device *dev) | |
1189 | { | |
94e8cc35 | 1190 | struct gfar_private *priv = netdev_priv(dev); |
1da177e4 LT |
1191 | int err; |
1192 | ||
bea3348e SH |
1193 | napi_enable(&priv->napi); |
1194 | ||
0fd56bb5 AF |
1195 | skb_queue_head_init(&priv->rx_recycle); |
1196 | ||
1da177e4 LT |
1197 | /* Initialize a bunch of registers */ |
1198 | init_registers(dev); | |
1199 | ||
1200 | gfar_set_mac_address(dev); | |
1201 | ||
1202 | err = init_phy(dev); | |
1203 | ||
bea3348e SH |
1204 | if(err) { |
1205 | napi_disable(&priv->napi); | |
1da177e4 | 1206 | return err; |
bea3348e | 1207 | } |
1da177e4 LT |
1208 | |
1209 | err = startup_gfar(dev); | |
db0e8e3f | 1210 | if (err) { |
bea3348e | 1211 | napi_disable(&priv->napi); |
db0e8e3f AV |
1212 | return err; |
1213 | } | |
1da177e4 LT |
1214 | |
1215 | netif_start_queue(dev); | |
1216 | ||
2884e5cc AV |
1217 | device_set_wakeup_enable(&dev->dev, priv->wol_en); |
1218 | ||
1da177e4 LT |
1219 | return err; |
1220 | } | |
1221 | ||
54dc79fe | 1222 | static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb) |
0bbaf069 | 1223 | { |
54dc79fe | 1224 | struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN); |
6c31d55f KG |
1225 | |
1226 | memset(fcb, 0, GMAC_FCB_LEN); | |
0bbaf069 | 1227 | |
0bbaf069 KG |
1228 | return fcb; |
1229 | } | |
1230 | ||
1231 | static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb) | |
1232 | { | |
7f7f5316 | 1233 | u8 flags = 0; |
0bbaf069 KG |
1234 | |
1235 | /* If we're here, it's a IP packet with a TCP or UDP | |
1236 | * payload. We set it to checksum, using a pseudo-header | |
1237 | * we provide | |
1238 | */ | |
7f7f5316 | 1239 | flags = TXFCB_DEFAULT; |
0bbaf069 | 1240 | |
7f7f5316 AF |
1241 | /* Tell the controller what the protocol is */ |
1242 | /* And provide the already calculated phcs */ | |
eddc9ec5 | 1243 | if (ip_hdr(skb)->protocol == IPPROTO_UDP) { |
7f7f5316 | 1244 | flags |= TXFCB_UDP; |
4bedb452 | 1245 | fcb->phcs = udp_hdr(skb)->check; |
7f7f5316 | 1246 | } else |
8da32de5 | 1247 | fcb->phcs = tcp_hdr(skb)->check; |
0bbaf069 KG |
1248 | |
1249 | /* l3os is the distance between the start of the | |
1250 | * frame (skb->data) and the start of the IP hdr. | |
1251 | * l4os is the distance between the start of the | |
1252 | * l3 hdr and the l4 hdr */ | |
bbe735e4 | 1253 | fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN); |
cfe1fc77 | 1254 | fcb->l4os = skb_network_header_len(skb); |
0bbaf069 | 1255 | |
7f7f5316 | 1256 | fcb->flags = flags; |
0bbaf069 KG |
1257 | } |
1258 | ||
7f7f5316 | 1259 | void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb) |
0bbaf069 | 1260 | { |
7f7f5316 | 1261 | fcb->flags |= TXFCB_VLN; |
0bbaf069 KG |
1262 | fcb->vlctl = vlan_tx_tag_get(skb); |
1263 | } | |
1264 | ||
4669bc90 DH |
1265 | static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride, |
1266 | struct txbd8 *base, int ring_size) | |
1267 | { | |
1268 | struct txbd8 *new_bd = bdp + stride; | |
1269 | ||
1270 | return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd; | |
1271 | } | |
1272 | ||
1273 | static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base, | |
1274 | int ring_size) | |
1275 | { | |
1276 | return skip_txbd(bdp, 1, base, ring_size); | |
1277 | } | |
1278 | ||
1da177e4 LT |
1279 | /* This is called by the kernel when a frame is ready for transmission. */ |
1280 | /* It is pointed to by the dev->hard_start_xmit function pointer */ | |
1281 | static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1282 | { | |
1283 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 | 1284 | struct txfcb *fcb = NULL; |
4669bc90 | 1285 | struct txbd8 *txbdp, *txbdp_start, *base; |
5a5efed4 | 1286 | u32 lstatus; |
4669bc90 DH |
1287 | int i; |
1288 | u32 bufaddr; | |
fef6108d | 1289 | unsigned long flags; |
4669bc90 DH |
1290 | unsigned int nr_frags, length; |
1291 | ||
1292 | base = priv->tx_bd_base; | |
1293 | ||
5b28beaf LY |
1294 | /* make space for additional header when fcb is needed */ |
1295 | if (((skb->ip_summed == CHECKSUM_PARTIAL) || | |
1296 | (priv->vlgrp && vlan_tx_tag_present(skb))) && | |
1297 | (skb_headroom(skb) < GMAC_FCB_LEN)) { | |
54dc79fe SH |
1298 | struct sk_buff *skb_new; |
1299 | ||
1300 | skb_new = skb_realloc_headroom(skb, GMAC_FCB_LEN); | |
1301 | if (!skb_new) { | |
1302 | dev->stats.tx_errors++; | |
bd14ba84 | 1303 | kfree_skb(skb); |
54dc79fe SH |
1304 | return NETDEV_TX_OK; |
1305 | } | |
1306 | kfree_skb(skb); | |
1307 | skb = skb_new; | |
1308 | } | |
1309 | ||
4669bc90 DH |
1310 | /* total number of fragments in the SKB */ |
1311 | nr_frags = skb_shinfo(skb)->nr_frags; | |
1312 | ||
1313 | spin_lock_irqsave(&priv->txlock, flags); | |
1314 | ||
1315 | /* check if there is space to queue this packet */ | |
7958a453 | 1316 | if ((nr_frags+1) > priv->num_txbdfree) { |
4669bc90 DH |
1317 | /* no space, stop the queue */ |
1318 | netif_stop_queue(dev); | |
1319 | dev->stats.tx_fifo_errors++; | |
1320 | spin_unlock_irqrestore(&priv->txlock, flags); | |
1321 | return NETDEV_TX_BUSY; | |
1322 | } | |
1da177e4 LT |
1323 | |
1324 | /* Update transmit stats */ | |
09f75cd7 | 1325 | dev->stats.tx_bytes += skb->len; |
1da177e4 | 1326 | |
4669bc90 | 1327 | txbdp = txbdp_start = priv->cur_tx; |
1da177e4 | 1328 | |
4669bc90 DH |
1329 | if (nr_frags == 0) { |
1330 | lstatus = txbdp->lstatus | BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); | |
1331 | } else { | |
1332 | /* Place the fragment addresses and lengths into the TxBDs */ | |
1333 | for (i = 0; i < nr_frags; i++) { | |
1334 | /* Point at the next BD, wrapping as needed */ | |
1335 | txbdp = next_txbd(txbdp, base, priv->tx_ring_size); | |
1336 | ||
1337 | length = skb_shinfo(skb)->frags[i].size; | |
1338 | ||
1339 | lstatus = txbdp->lstatus | length | | |
1340 | BD_LFLAG(TXBD_READY); | |
1341 | ||
1342 | /* Handle the last BD specially */ | |
1343 | if (i == nr_frags - 1) | |
1344 | lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); | |
1da177e4 | 1345 | |
4826857f | 1346 | bufaddr = dma_map_page(&priv->ofdev->dev, |
4669bc90 DH |
1347 | skb_shinfo(skb)->frags[i].page, |
1348 | skb_shinfo(skb)->frags[i].page_offset, | |
1349 | length, | |
1350 | DMA_TO_DEVICE); | |
1351 | ||
1352 | /* set the TxBD length and buffer pointer */ | |
1353 | txbdp->bufPtr = bufaddr; | |
1354 | txbdp->lstatus = lstatus; | |
1355 | } | |
1356 | ||
1357 | lstatus = txbdp_start->lstatus; | |
1358 | } | |
1da177e4 | 1359 | |
0bbaf069 | 1360 | /* Set up checksumming */ |
12dea57b | 1361 | if (CHECKSUM_PARTIAL == skb->ip_summed) { |
54dc79fe SH |
1362 | fcb = gfar_add_fcb(skb); |
1363 | lstatus |= BD_LFLAG(TXBD_TOE); | |
1364 | gfar_tx_checksum(skb, fcb); | |
0bbaf069 KG |
1365 | } |
1366 | ||
77ecaf2d | 1367 | if (priv->vlgrp && vlan_tx_tag_present(skb)) { |
54dc79fe SH |
1368 | if (unlikely(NULL == fcb)) { |
1369 | fcb = gfar_add_fcb(skb); | |
5a5efed4 | 1370 | lstatus |= BD_LFLAG(TXBD_TOE); |
7f7f5316 | 1371 | } |
54dc79fe SH |
1372 | |
1373 | gfar_tx_vlan(skb, fcb); | |
0bbaf069 KG |
1374 | } |
1375 | ||
4669bc90 | 1376 | /* setup the TxBD length and buffer pointer for the first BD */ |
1da177e4 | 1377 | priv->tx_skbuff[priv->skb_curtx] = skb; |
4826857f | 1378 | txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data, |
4669bc90 | 1379 | skb_headlen(skb), DMA_TO_DEVICE); |
1da177e4 | 1380 | |
4669bc90 | 1381 | lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb); |
1da177e4 | 1382 | |
4669bc90 DH |
1383 | /* |
1384 | * The powerpc-specific eieio() is used, as wmb() has too strong | |
3b6330ce SW |
1385 | * semantics (it requires synchronization between cacheable and |
1386 | * uncacheable mappings, which eieio doesn't provide and which we | |
1387 | * don't need), thus requiring a more expensive sync instruction. At | |
1388 | * some point, the set of architecture-independent barrier functions | |
1389 | * should be expanded to include weaker barriers. | |
1390 | */ | |
3b6330ce | 1391 | eieio(); |
7f7f5316 | 1392 | |
4669bc90 DH |
1393 | txbdp_start->lstatus = lstatus; |
1394 | ||
1395 | /* Update the current skb pointer to the next entry we will use | |
1396 | * (wrapping if necessary) */ | |
1397 | priv->skb_curtx = (priv->skb_curtx + 1) & | |
1398 | TX_RING_MOD_MASK(priv->tx_ring_size); | |
1399 | ||
1400 | priv->cur_tx = next_txbd(txbdp, base, priv->tx_ring_size); | |
1401 | ||
1402 | /* reduce TxBD free count */ | |
1403 | priv->num_txbdfree -= (nr_frags + 1); | |
1404 | ||
1405 | dev->trans_start = jiffies; | |
1da177e4 LT |
1406 | |
1407 | /* If the next BD still needs to be cleaned up, then the bds | |
1408 | are full. We need to tell the kernel to stop sending us stuff. */ | |
4669bc90 | 1409 | if (!priv->num_txbdfree) { |
1da177e4 LT |
1410 | netif_stop_queue(dev); |
1411 | ||
09f75cd7 | 1412 | dev->stats.tx_fifo_errors++; |
1da177e4 LT |
1413 | } |
1414 | ||
1da177e4 LT |
1415 | /* Tell the DMA to go go go */ |
1416 | gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); | |
1417 | ||
1418 | /* Unlock priv */ | |
fef6108d | 1419 | spin_unlock_irqrestore(&priv->txlock, flags); |
1da177e4 | 1420 | |
54dc79fe | 1421 | return NETDEV_TX_OK; |
1da177e4 LT |
1422 | } |
1423 | ||
1424 | /* Stops the kernel queue, and halts the controller */ | |
1425 | static int gfar_close(struct net_device *dev) | |
1426 | { | |
1427 | struct gfar_private *priv = netdev_priv(dev); | |
bea3348e SH |
1428 | |
1429 | napi_disable(&priv->napi); | |
1430 | ||
0fd56bb5 | 1431 | skb_queue_purge(&priv->rx_recycle); |
ab939905 | 1432 | cancel_work_sync(&priv->reset_task); |
1da177e4 LT |
1433 | stop_gfar(dev); |
1434 | ||
bb40dcbb AF |
1435 | /* Disconnect from the PHY */ |
1436 | phy_disconnect(priv->phydev); | |
1437 | priv->phydev = NULL; | |
1da177e4 LT |
1438 | |
1439 | netif_stop_queue(dev); | |
1440 | ||
1441 | return 0; | |
1442 | } | |
1443 | ||
1da177e4 | 1444 | /* Changes the mac address if the controller is not running. */ |
f162b9d5 | 1445 | static int gfar_set_mac_address(struct net_device *dev) |
1da177e4 | 1446 | { |
7f7f5316 | 1447 | gfar_set_mac_for_addr(dev, 0, dev->dev_addr); |
1da177e4 LT |
1448 | |
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | ||
0bbaf069 KG |
1453 | /* Enables and disables VLAN insertion/extraction */ |
1454 | static void gfar_vlan_rx_register(struct net_device *dev, | |
1455 | struct vlan_group *grp) | |
1456 | { | |
1457 | struct gfar_private *priv = netdev_priv(dev); | |
1458 | unsigned long flags; | |
1459 | u32 tempval; | |
1460 | ||
fef6108d | 1461 | spin_lock_irqsave(&priv->rxlock, flags); |
0bbaf069 | 1462 | |
cd1f55a5 | 1463 | priv->vlgrp = grp; |
0bbaf069 KG |
1464 | |
1465 | if (grp) { | |
1466 | /* Enable VLAN tag insertion */ | |
1467 | tempval = gfar_read(&priv->regs->tctrl); | |
1468 | tempval |= TCTRL_VLINS; | |
1469 | ||
1470 | gfar_write(&priv->regs->tctrl, tempval); | |
6aa20a22 | 1471 | |
0bbaf069 KG |
1472 | /* Enable VLAN tag extraction */ |
1473 | tempval = gfar_read(&priv->regs->rctrl); | |
77ecaf2d | 1474 | tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT); |
0bbaf069 KG |
1475 | gfar_write(&priv->regs->rctrl, tempval); |
1476 | } else { | |
1477 | /* Disable VLAN tag insertion */ | |
1478 | tempval = gfar_read(&priv->regs->tctrl); | |
1479 | tempval &= ~TCTRL_VLINS; | |
1480 | gfar_write(&priv->regs->tctrl, tempval); | |
1481 | ||
1482 | /* Disable VLAN tag extraction */ | |
1483 | tempval = gfar_read(&priv->regs->rctrl); | |
1484 | tempval &= ~RCTRL_VLEX; | |
77ecaf2d DH |
1485 | /* If parse is no longer required, then disable parser */ |
1486 | if (tempval & RCTRL_REQ_PARSER) | |
1487 | tempval |= RCTRL_PRSDEP_INIT; | |
1488 | else | |
1489 | tempval &= ~RCTRL_PRSDEP_INIT; | |
0bbaf069 KG |
1490 | gfar_write(&priv->regs->rctrl, tempval); |
1491 | } | |
1492 | ||
77ecaf2d DH |
1493 | gfar_change_mtu(dev, dev->mtu); |
1494 | ||
fef6108d | 1495 | spin_unlock_irqrestore(&priv->rxlock, flags); |
0bbaf069 KG |
1496 | } |
1497 | ||
1da177e4 LT |
1498 | static int gfar_change_mtu(struct net_device *dev, int new_mtu) |
1499 | { | |
1500 | int tempsize, tempval; | |
1501 | struct gfar_private *priv = netdev_priv(dev); | |
1502 | int oldsize = priv->rx_buffer_size; | |
0bbaf069 KG |
1503 | int frame_size = new_mtu + ETH_HLEN; |
1504 | ||
77ecaf2d | 1505 | if (priv->vlgrp) |
faa89577 | 1506 | frame_size += VLAN_HLEN; |
0bbaf069 | 1507 | |
1da177e4 | 1508 | if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) { |
0bbaf069 KG |
1509 | if (netif_msg_drv(priv)) |
1510 | printk(KERN_ERR "%s: Invalid MTU setting\n", | |
1511 | dev->name); | |
1da177e4 LT |
1512 | return -EINVAL; |
1513 | } | |
1514 | ||
77ecaf2d DH |
1515 | if (gfar_uses_fcb(priv)) |
1516 | frame_size += GMAC_FCB_LEN; | |
1517 | ||
1518 | frame_size += priv->padding; | |
1519 | ||
1da177e4 LT |
1520 | tempsize = |
1521 | (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) + | |
1522 | INCREMENTAL_BUFFER_SIZE; | |
1523 | ||
1524 | /* Only stop and start the controller if it isn't already | |
7f7f5316 | 1525 | * stopped, and we changed something */ |
1da177e4 LT |
1526 | if ((oldsize != tempsize) && (dev->flags & IFF_UP)) |
1527 | stop_gfar(dev); | |
1528 | ||
1529 | priv->rx_buffer_size = tempsize; | |
1530 | ||
1531 | dev->mtu = new_mtu; | |
1532 | ||
1533 | gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); | |
1534 | gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size); | |
1535 | ||
1536 | /* If the mtu is larger than the max size for standard | |
1537 | * ethernet frames (ie, a jumbo frame), then set maccfg2 | |
1538 | * to allow huge frames, and to check the length */ | |
1539 | tempval = gfar_read(&priv->regs->maccfg2); | |
1540 | ||
1541 | if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE) | |
1542 | tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); | |
1543 | else | |
1544 | tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); | |
1545 | ||
1546 | gfar_write(&priv->regs->maccfg2, tempval); | |
1547 | ||
1548 | if ((oldsize != tempsize) && (dev->flags & IFF_UP)) | |
1549 | startup_gfar(dev); | |
1550 | ||
1551 | return 0; | |
1552 | } | |
1553 | ||
ab939905 | 1554 | /* gfar_reset_task gets scheduled when a packet has not been |
1da177e4 LT |
1555 | * transmitted after a set amount of time. |
1556 | * For now, assume that clearing out all the structures, and | |
ab939905 SS |
1557 | * starting over will fix the problem. |
1558 | */ | |
1559 | static void gfar_reset_task(struct work_struct *work) | |
1da177e4 | 1560 | { |
ab939905 SS |
1561 | struct gfar_private *priv = container_of(work, struct gfar_private, |
1562 | reset_task); | |
4826857f | 1563 | struct net_device *dev = priv->ndev; |
1da177e4 LT |
1564 | |
1565 | if (dev->flags & IFF_UP) { | |
cbea2707 | 1566 | netif_stop_queue(dev); |
1da177e4 LT |
1567 | stop_gfar(dev); |
1568 | startup_gfar(dev); | |
cbea2707 | 1569 | netif_start_queue(dev); |
1da177e4 LT |
1570 | } |
1571 | ||
263ba320 | 1572 | netif_tx_schedule_all(dev); |
1da177e4 LT |
1573 | } |
1574 | ||
ab939905 SS |
1575 | static void gfar_timeout(struct net_device *dev) |
1576 | { | |
1577 | struct gfar_private *priv = netdev_priv(dev); | |
1578 | ||
1579 | dev->stats.tx_errors++; | |
1580 | schedule_work(&priv->reset_task); | |
1581 | } | |
1582 | ||
1da177e4 | 1583 | /* Interrupt Handler for Transmit complete */ |
f162b9d5 | 1584 | static int gfar_clean_tx_ring(struct net_device *dev) |
1da177e4 | 1585 | { |
d080cd63 | 1586 | struct gfar_private *priv = netdev_priv(dev); |
4669bc90 DH |
1587 | struct txbd8 *bdp; |
1588 | struct txbd8 *lbdp = NULL; | |
1589 | struct txbd8 *base = priv->tx_bd_base; | |
1590 | struct sk_buff *skb; | |
1591 | int skb_dirtytx; | |
1592 | int tx_ring_size = priv->tx_ring_size; | |
1593 | int frags = 0; | |
1594 | int i; | |
d080cd63 | 1595 | int howmany = 0; |
4669bc90 | 1596 | u32 lstatus; |
1da177e4 | 1597 | |
1da177e4 | 1598 | bdp = priv->dirty_tx; |
4669bc90 | 1599 | skb_dirtytx = priv->skb_dirtytx; |
1da177e4 | 1600 | |
4669bc90 DH |
1601 | while ((skb = priv->tx_skbuff[skb_dirtytx])) { |
1602 | frags = skb_shinfo(skb)->nr_frags; | |
1603 | lbdp = skip_txbd(bdp, frags, base, tx_ring_size); | |
1da177e4 | 1604 | |
4669bc90 | 1605 | lstatus = lbdp->lstatus; |
1da177e4 | 1606 | |
4669bc90 DH |
1607 | /* Only clean completed frames */ |
1608 | if ((lstatus & BD_LFLAG(TXBD_READY)) && | |
1609 | (lstatus & BD_LENGTH_MASK)) | |
1610 | break; | |
1611 | ||
4826857f | 1612 | dma_unmap_single(&priv->ofdev->dev, |
4669bc90 DH |
1613 | bdp->bufPtr, |
1614 | bdp->length, | |
1615 | DMA_TO_DEVICE); | |
81183059 | 1616 | |
4669bc90 DH |
1617 | bdp->lstatus &= BD_LFLAG(TXBD_WRAP); |
1618 | bdp = next_txbd(bdp, base, tx_ring_size); | |
d080cd63 | 1619 | |
4669bc90 | 1620 | for (i = 0; i < frags; i++) { |
4826857f | 1621 | dma_unmap_page(&priv->ofdev->dev, |
4669bc90 DH |
1622 | bdp->bufPtr, |
1623 | bdp->length, | |
1624 | DMA_TO_DEVICE); | |
1625 | bdp->lstatus &= BD_LFLAG(TXBD_WRAP); | |
1626 | bdp = next_txbd(bdp, base, tx_ring_size); | |
1627 | } | |
1da177e4 | 1628 | |
0fd56bb5 AF |
1629 | /* |
1630 | * If there's room in the queue (limit it to rx_buffer_size) | |
1631 | * we add this skb back into the pool, if it's the right size | |
1632 | */ | |
1633 | if (skb_queue_len(&priv->rx_recycle) < priv->rx_ring_size && | |
1634 | skb_recycle_check(skb, priv->rx_buffer_size + | |
1635 | RXBUF_ALIGNMENT)) | |
1636 | __skb_queue_head(&priv->rx_recycle, skb); | |
1637 | else | |
1638 | dev_kfree_skb_any(skb); | |
1639 | ||
4669bc90 | 1640 | priv->tx_skbuff[skb_dirtytx] = NULL; |
d080cd63 | 1641 | |
4669bc90 DH |
1642 | skb_dirtytx = (skb_dirtytx + 1) & |
1643 | TX_RING_MOD_MASK(tx_ring_size); | |
1644 | ||
1645 | howmany++; | |
1646 | priv->num_txbdfree += frags + 1; | |
1647 | } | |
1da177e4 | 1648 | |
4669bc90 DH |
1649 | /* If we freed a buffer, we can restart transmission, if necessary */ |
1650 | if (netif_queue_stopped(dev) && priv->num_txbdfree) | |
1651 | netif_wake_queue(dev); | |
1da177e4 | 1652 | |
4669bc90 DH |
1653 | /* Update dirty indicators */ |
1654 | priv->skb_dirtytx = skb_dirtytx; | |
1655 | priv->dirty_tx = bdp; | |
1da177e4 | 1656 | |
d080cd63 DH |
1657 | dev->stats.tx_packets += howmany; |
1658 | ||
1659 | return howmany; | |
1660 | } | |
1661 | ||
8c7396ae | 1662 | static void gfar_schedule_cleanup(struct net_device *dev) |
d080cd63 | 1663 | { |
d080cd63 | 1664 | struct gfar_private *priv = netdev_priv(dev); |
a6d0b91a AV |
1665 | unsigned long flags; |
1666 | ||
1667 | spin_lock_irqsave(&priv->txlock, flags); | |
1668 | spin_lock(&priv->rxlock); | |
1669 | ||
288379f0 | 1670 | if (napi_schedule_prep(&priv->napi)) { |
8c7396ae | 1671 | gfar_write(&priv->regs->imask, IMASK_RTX_DISABLED); |
288379f0 | 1672 | __napi_schedule(&priv->napi); |
8707bdd4 JP |
1673 | } else { |
1674 | /* | |
1675 | * Clear IEVENT, so interrupts aren't called again | |
1676 | * because of the packets that have already arrived. | |
1677 | */ | |
1678 | gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK); | |
2f448911 | 1679 | } |
a6d0b91a AV |
1680 | |
1681 | spin_unlock(&priv->rxlock); | |
1682 | spin_unlock_irqrestore(&priv->txlock, flags); | |
8c7396ae | 1683 | } |
1da177e4 | 1684 | |
8c7396ae DH |
1685 | /* Interrupt Handler for Transmit complete */ |
1686 | static irqreturn_t gfar_transmit(int irq, void *dev_id) | |
1687 | { | |
1688 | gfar_schedule_cleanup((struct net_device *)dev_id); | |
1da177e4 LT |
1689 | return IRQ_HANDLED; |
1690 | } | |
1691 | ||
815b97c6 AF |
1692 | static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp, |
1693 | struct sk_buff *skb) | |
1694 | { | |
1695 | struct gfar_private *priv = netdev_priv(dev); | |
8a102fe0 | 1696 | dma_addr_t buf; |
815b97c6 | 1697 | |
8a102fe0 AV |
1698 | buf = dma_map_single(&priv->ofdev->dev, skb->data, |
1699 | priv->rx_buffer_size, DMA_FROM_DEVICE); | |
1700 | gfar_init_rxbdp(dev, bdp, buf); | |
815b97c6 AF |
1701 | } |
1702 | ||
1703 | ||
1704 | struct sk_buff * gfar_new_skb(struct net_device *dev) | |
1da177e4 | 1705 | { |
7f7f5316 | 1706 | unsigned int alignamount; |
1da177e4 LT |
1707 | struct gfar_private *priv = netdev_priv(dev); |
1708 | struct sk_buff *skb = NULL; | |
1da177e4 | 1709 | |
0fd56bb5 AF |
1710 | skb = __skb_dequeue(&priv->rx_recycle); |
1711 | if (!skb) | |
1712 | skb = netdev_alloc_skb(dev, | |
1713 | priv->rx_buffer_size + RXBUF_ALIGNMENT); | |
1da177e4 | 1714 | |
815b97c6 | 1715 | if (!skb) |
1da177e4 LT |
1716 | return NULL; |
1717 | ||
7f7f5316 | 1718 | alignamount = RXBUF_ALIGNMENT - |
bea3348e | 1719 | (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)); |
7f7f5316 | 1720 | |
1da177e4 LT |
1721 | /* We need the data buffer to be aligned properly. We will reserve |
1722 | * as many bytes as needed to align the data properly | |
1723 | */ | |
7f7f5316 | 1724 | skb_reserve(skb, alignamount); |
1da177e4 | 1725 | |
1da177e4 LT |
1726 | return skb; |
1727 | } | |
1728 | ||
298e1a9e | 1729 | static inline void count_errors(unsigned short status, struct net_device *dev) |
1da177e4 | 1730 | { |
298e1a9e | 1731 | struct gfar_private *priv = netdev_priv(dev); |
09f75cd7 | 1732 | struct net_device_stats *stats = &dev->stats; |
1da177e4 LT |
1733 | struct gfar_extra_stats *estats = &priv->extra_stats; |
1734 | ||
1735 | /* If the packet was truncated, none of the other errors | |
1736 | * matter */ | |
1737 | if (status & RXBD_TRUNCATED) { | |
1738 | stats->rx_length_errors++; | |
1739 | ||
1740 | estats->rx_trunc++; | |
1741 | ||
1742 | return; | |
1743 | } | |
1744 | /* Count the errors, if there were any */ | |
1745 | if (status & (RXBD_LARGE | RXBD_SHORT)) { | |
1746 | stats->rx_length_errors++; | |
1747 | ||
1748 | if (status & RXBD_LARGE) | |
1749 | estats->rx_large++; | |
1750 | else | |
1751 | estats->rx_short++; | |
1752 | } | |
1753 | if (status & RXBD_NONOCTET) { | |
1754 | stats->rx_frame_errors++; | |
1755 | estats->rx_nonoctet++; | |
1756 | } | |
1757 | if (status & RXBD_CRCERR) { | |
1758 | estats->rx_crcerr++; | |
1759 | stats->rx_crc_errors++; | |
1760 | } | |
1761 | if (status & RXBD_OVERRUN) { | |
1762 | estats->rx_overrun++; | |
1763 | stats->rx_crc_errors++; | |
1764 | } | |
1765 | } | |
1766 | ||
7d12e780 | 1767 | irqreturn_t gfar_receive(int irq, void *dev_id) |
1da177e4 | 1768 | { |
8c7396ae | 1769 | gfar_schedule_cleanup((struct net_device *)dev_id); |
1da177e4 LT |
1770 | return IRQ_HANDLED; |
1771 | } | |
1772 | ||
0bbaf069 KG |
1773 | static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb) |
1774 | { | |
1775 | /* If valid headers were found, and valid sums | |
1776 | * were verified, then we tell the kernel that no | |
1777 | * checksumming is necessary. Otherwise, it is */ | |
7f7f5316 | 1778 | if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU)) |
0bbaf069 KG |
1779 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1780 | else | |
1781 | skb->ip_summed = CHECKSUM_NONE; | |
1782 | } | |
1783 | ||
1784 | ||
1da177e4 LT |
1785 | /* gfar_process_frame() -- handle one incoming packet if skb |
1786 | * isn't NULL. */ | |
1787 | static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, | |
2c2db48a | 1788 | int amount_pull) |
1da177e4 LT |
1789 | { |
1790 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 | 1791 | struct rxfcb *fcb = NULL; |
1da177e4 | 1792 | |
2c2db48a | 1793 | int ret; |
1da177e4 | 1794 | |
2c2db48a DH |
1795 | /* fcb is at the beginning if exists */ |
1796 | fcb = (struct rxfcb *)skb->data; | |
0bbaf069 | 1797 | |
2c2db48a DH |
1798 | /* Remove the FCB from the skb */ |
1799 | /* Remove the padded bytes, if there are any */ | |
1800 | if (amount_pull) | |
1801 | skb_pull(skb, amount_pull); | |
0bbaf069 | 1802 | |
2c2db48a DH |
1803 | if (priv->rx_csum_enable) |
1804 | gfar_rx_checksum(skb, fcb); | |
0bbaf069 | 1805 | |
2c2db48a DH |
1806 | /* Tell the skb what kind of packet this is */ |
1807 | skb->protocol = eth_type_trans(skb, dev); | |
1da177e4 | 1808 | |
2c2db48a DH |
1809 | /* Send the packet up the stack */ |
1810 | if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN))) | |
1811 | ret = vlan_hwaccel_receive_skb(skb, priv->vlgrp, fcb->vlctl); | |
1812 | else | |
1813 | ret = netif_receive_skb(skb); | |
0bbaf069 | 1814 | |
2c2db48a DH |
1815 | if (NET_RX_DROP == ret) |
1816 | priv->extra_stats.kernel_dropped++; | |
1da177e4 LT |
1817 | |
1818 | return 0; | |
1819 | } | |
1820 | ||
1821 | /* gfar_clean_rx_ring() -- Processes each frame in the rx ring | |
0bbaf069 | 1822 | * until the budget/quota has been reached. Returns the number |
1da177e4 LT |
1823 | * of frames handled |
1824 | */ | |
0bbaf069 | 1825 | int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit) |
1da177e4 | 1826 | { |
31de198b | 1827 | struct rxbd8 *bdp, *base; |
1da177e4 | 1828 | struct sk_buff *skb; |
2c2db48a DH |
1829 | int pkt_len; |
1830 | int amount_pull; | |
1da177e4 LT |
1831 | int howmany = 0; |
1832 | struct gfar_private *priv = netdev_priv(dev); | |
1833 | ||
1834 | /* Get the first full descriptor */ | |
1835 | bdp = priv->cur_rx; | |
31de198b | 1836 | base = priv->rx_bd_base; |
1da177e4 | 1837 | |
2c2db48a DH |
1838 | amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0) + |
1839 | priv->padding; | |
1840 | ||
1da177e4 | 1841 | while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) { |
815b97c6 | 1842 | struct sk_buff *newskb; |
3b6330ce | 1843 | rmb(); |
815b97c6 AF |
1844 | |
1845 | /* Add another skb for the future */ | |
1846 | newskb = gfar_new_skb(dev); | |
1847 | ||
1da177e4 LT |
1848 | skb = priv->rx_skbuff[priv->skb_currx]; |
1849 | ||
4826857f | 1850 | dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr, |
81183059 AF |
1851 | priv->rx_buffer_size, DMA_FROM_DEVICE); |
1852 | ||
815b97c6 AF |
1853 | /* We drop the frame if we failed to allocate a new buffer */ |
1854 | if (unlikely(!newskb || !(bdp->status & RXBD_LAST) || | |
1855 | bdp->status & RXBD_ERR)) { | |
1856 | count_errors(bdp->status, dev); | |
1857 | ||
1858 | if (unlikely(!newskb)) | |
1859 | newskb = skb; | |
4e2fd555 LB |
1860 | else if (skb) { |
1861 | /* | |
1862 | * We need to reset ->data to what it | |
1863 | * was before gfar_new_skb() re-aligned | |
1864 | * it to an RXBUF_ALIGNMENT boundary | |
1865 | * before we put the skb back on the | |
1866 | * recycle list. | |
1867 | */ | |
1868 | skb->data = skb->head + NET_SKB_PAD; | |
0fd56bb5 | 1869 | __skb_queue_head(&priv->rx_recycle, skb); |
4e2fd555 | 1870 | } |
815b97c6 | 1871 | } else { |
1da177e4 | 1872 | /* Increment the number of packets */ |
09f75cd7 | 1873 | dev->stats.rx_packets++; |
1da177e4 LT |
1874 | howmany++; |
1875 | ||
2c2db48a DH |
1876 | if (likely(skb)) { |
1877 | pkt_len = bdp->length - ETH_FCS_LEN; | |
1878 | /* Remove the FCS from the packet length */ | |
1879 | skb_put(skb, pkt_len); | |
1880 | dev->stats.rx_bytes += pkt_len; | |
1da177e4 | 1881 | |
1577ecef AF |
1882 | if (in_irq() || irqs_disabled()) |
1883 | printk("Interrupt problem!\n"); | |
2c2db48a DH |
1884 | gfar_process_frame(dev, skb, amount_pull); |
1885 | ||
1886 | } else { | |
1887 | if (netif_msg_rx_err(priv)) | |
1888 | printk(KERN_WARNING | |
1889 | "%s: Missing skb!\n", dev->name); | |
1890 | dev->stats.rx_dropped++; | |
1891 | priv->extra_stats.rx_skbmissing++; | |
1892 | } | |
1da177e4 | 1893 | |
1da177e4 LT |
1894 | } |
1895 | ||
815b97c6 | 1896 | priv->rx_skbuff[priv->skb_currx] = newskb; |
1da177e4 | 1897 | |
815b97c6 AF |
1898 | /* Setup the new bdp */ |
1899 | gfar_new_rxbdp(dev, bdp, newskb); | |
1da177e4 LT |
1900 | |
1901 | /* Update to the next pointer */ | |
31de198b | 1902 | bdp = next_bd(bdp, base, priv->rx_ring_size); |
1da177e4 LT |
1903 | |
1904 | /* update to point at the next skb */ | |
1905 | priv->skb_currx = | |
815b97c6 AF |
1906 | (priv->skb_currx + 1) & |
1907 | RX_RING_MOD_MASK(priv->rx_ring_size); | |
1da177e4 LT |
1908 | } |
1909 | ||
1910 | /* Update the current rxbd pointer to be the next one */ | |
1911 | priv->cur_rx = bdp; | |
1912 | ||
1da177e4 LT |
1913 | return howmany; |
1914 | } | |
1915 | ||
bea3348e | 1916 | static int gfar_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1917 | { |
bea3348e | 1918 | struct gfar_private *priv = container_of(napi, struct gfar_private, napi); |
4826857f | 1919 | struct net_device *dev = priv->ndev; |
42199884 AF |
1920 | int tx_cleaned = 0; |
1921 | int rx_cleaned = 0; | |
d080cd63 DH |
1922 | unsigned long flags; |
1923 | ||
8c7396ae DH |
1924 | /* Clear IEVENT, so interrupts aren't called again |
1925 | * because of the packets that have already arrived */ | |
1926 | gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK); | |
1927 | ||
d080cd63 DH |
1928 | /* If we fail to get the lock, don't bother with the TX BDs */ |
1929 | if (spin_trylock_irqsave(&priv->txlock, flags)) { | |
42199884 | 1930 | tx_cleaned = gfar_clean_tx_ring(dev); |
d080cd63 DH |
1931 | spin_unlock_irqrestore(&priv->txlock, flags); |
1932 | } | |
1da177e4 | 1933 | |
42199884 | 1934 | rx_cleaned = gfar_clean_rx_ring(dev, budget); |
1da177e4 | 1935 | |
42199884 AF |
1936 | if (tx_cleaned) |
1937 | return budget; | |
1938 | ||
1939 | if (rx_cleaned < budget) { | |
288379f0 | 1940 | napi_complete(napi); |
1da177e4 LT |
1941 | |
1942 | /* Clear the halt bit in RSTAT */ | |
1943 | gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT); | |
1944 | ||
1945 | gfar_write(&priv->regs->imask, IMASK_DEFAULT); | |
1946 | ||
1947 | /* If we are coalescing interrupts, update the timer */ | |
1948 | /* Otherwise, clear it */ | |
2f448911 AF |
1949 | if (likely(priv->rxcoalescing)) { |
1950 | gfar_write(&priv->regs->rxic, 0); | |
b46a8454 | 1951 | gfar_write(&priv->regs->rxic, priv->rxic); |
2f448911 | 1952 | } |
8c7396ae DH |
1953 | if (likely(priv->txcoalescing)) { |
1954 | gfar_write(&priv->regs->txic, 0); | |
1955 | gfar_write(&priv->regs->txic, priv->txic); | |
1956 | } | |
1da177e4 LT |
1957 | } |
1958 | ||
42199884 | 1959 | return rx_cleaned; |
1da177e4 | 1960 | } |
1da177e4 | 1961 | |
f2d71c2d VW |
1962 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1963 | /* | |
1964 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
1965 | * without having to re-enable interrupts. It's not called while | |
1966 | * the interrupt routine is executing. | |
1967 | */ | |
1968 | static void gfar_netpoll(struct net_device *dev) | |
1969 | { | |
1970 | struct gfar_private *priv = netdev_priv(dev); | |
1971 | ||
1972 | /* If the device has multiple interrupts, run tx/rx */ | |
b31a1d8b | 1973 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { |
f2d71c2d VW |
1974 | disable_irq(priv->interruptTransmit); |
1975 | disable_irq(priv->interruptReceive); | |
1976 | disable_irq(priv->interruptError); | |
1977 | gfar_interrupt(priv->interruptTransmit, dev); | |
1978 | enable_irq(priv->interruptError); | |
1979 | enable_irq(priv->interruptReceive); | |
1980 | enable_irq(priv->interruptTransmit); | |
1981 | } else { | |
1982 | disable_irq(priv->interruptTransmit); | |
1983 | gfar_interrupt(priv->interruptTransmit, dev); | |
1984 | enable_irq(priv->interruptTransmit); | |
1985 | } | |
1986 | } | |
1987 | #endif | |
1988 | ||
1da177e4 | 1989 | /* The interrupt handler for devices with one interrupt */ |
7d12e780 | 1990 | static irqreturn_t gfar_interrupt(int irq, void *dev_id) |
1da177e4 LT |
1991 | { |
1992 | struct net_device *dev = dev_id; | |
1993 | struct gfar_private *priv = netdev_priv(dev); | |
1994 | ||
1995 | /* Save ievent for future reference */ | |
1996 | u32 events = gfar_read(&priv->regs->ievent); | |
1997 | ||
1da177e4 | 1998 | /* Check for reception */ |
538cc7ee | 1999 | if (events & IEVENT_RX_MASK) |
7d12e780 | 2000 | gfar_receive(irq, dev_id); |
1da177e4 LT |
2001 | |
2002 | /* Check for transmit completion */ | |
538cc7ee | 2003 | if (events & IEVENT_TX_MASK) |
7d12e780 | 2004 | gfar_transmit(irq, dev_id); |
1da177e4 | 2005 | |
538cc7ee SS |
2006 | /* Check for errors */ |
2007 | if (events & IEVENT_ERR_MASK) | |
2008 | gfar_error(irq, dev_id); | |
1da177e4 LT |
2009 | |
2010 | return IRQ_HANDLED; | |
2011 | } | |
2012 | ||
1da177e4 LT |
2013 | /* Called every time the controller might need to be made |
2014 | * aware of new link state. The PHY code conveys this | |
bb40dcbb | 2015 | * information through variables in the phydev structure, and this |
1da177e4 LT |
2016 | * function converts those variables into the appropriate |
2017 | * register values, and can bring down the device if needed. | |
2018 | */ | |
2019 | static void adjust_link(struct net_device *dev) | |
2020 | { | |
2021 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 2022 | struct gfar __iomem *regs = priv->regs; |
bb40dcbb AF |
2023 | unsigned long flags; |
2024 | struct phy_device *phydev = priv->phydev; | |
2025 | int new_state = 0; | |
2026 | ||
fef6108d | 2027 | spin_lock_irqsave(&priv->txlock, flags); |
bb40dcbb AF |
2028 | if (phydev->link) { |
2029 | u32 tempval = gfar_read(®s->maccfg2); | |
7f7f5316 | 2030 | u32 ecntrl = gfar_read(®s->ecntrl); |
1da177e4 | 2031 | |
1da177e4 LT |
2032 | /* Now we make sure that we can be in full duplex mode. |
2033 | * If not, we operate in half-duplex mode. */ | |
bb40dcbb AF |
2034 | if (phydev->duplex != priv->oldduplex) { |
2035 | new_state = 1; | |
2036 | if (!(phydev->duplex)) | |
1da177e4 | 2037 | tempval &= ~(MACCFG2_FULL_DUPLEX); |
bb40dcbb | 2038 | else |
1da177e4 | 2039 | tempval |= MACCFG2_FULL_DUPLEX; |
1da177e4 | 2040 | |
bb40dcbb | 2041 | priv->oldduplex = phydev->duplex; |
1da177e4 LT |
2042 | } |
2043 | ||
bb40dcbb AF |
2044 | if (phydev->speed != priv->oldspeed) { |
2045 | new_state = 1; | |
2046 | switch (phydev->speed) { | |
1da177e4 | 2047 | case 1000: |
1da177e4 LT |
2048 | tempval = |
2049 | ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII); | |
f430e49e LY |
2050 | |
2051 | ecntrl &= ~(ECNTRL_R100); | |
1da177e4 LT |
2052 | break; |
2053 | case 100: | |
2054 | case 10: | |
1da177e4 LT |
2055 | tempval = |
2056 | ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII); | |
7f7f5316 AF |
2057 | |
2058 | /* Reduced mode distinguishes | |
2059 | * between 10 and 100 */ | |
2060 | if (phydev->speed == SPEED_100) | |
2061 | ecntrl |= ECNTRL_R100; | |
2062 | else | |
2063 | ecntrl &= ~(ECNTRL_R100); | |
1da177e4 LT |
2064 | break; |
2065 | default: | |
0bbaf069 KG |
2066 | if (netif_msg_link(priv)) |
2067 | printk(KERN_WARNING | |
bb40dcbb AF |
2068 | "%s: Ack! Speed (%d) is not 10/100/1000!\n", |
2069 | dev->name, phydev->speed); | |
1da177e4 LT |
2070 | break; |
2071 | } | |
2072 | ||
bb40dcbb | 2073 | priv->oldspeed = phydev->speed; |
1da177e4 LT |
2074 | } |
2075 | ||
bb40dcbb | 2076 | gfar_write(®s->maccfg2, tempval); |
7f7f5316 | 2077 | gfar_write(®s->ecntrl, ecntrl); |
bb40dcbb | 2078 | |
1da177e4 | 2079 | if (!priv->oldlink) { |
bb40dcbb | 2080 | new_state = 1; |
1da177e4 | 2081 | priv->oldlink = 1; |
1da177e4 | 2082 | } |
bb40dcbb AF |
2083 | } else if (priv->oldlink) { |
2084 | new_state = 1; | |
2085 | priv->oldlink = 0; | |
2086 | priv->oldspeed = 0; | |
2087 | priv->oldduplex = -1; | |
1da177e4 | 2088 | } |
1da177e4 | 2089 | |
bb40dcbb AF |
2090 | if (new_state && netif_msg_link(priv)) |
2091 | phy_print_status(phydev); | |
2092 | ||
fef6108d | 2093 | spin_unlock_irqrestore(&priv->txlock, flags); |
bb40dcbb | 2094 | } |
1da177e4 LT |
2095 | |
2096 | /* Update the hash table based on the current list of multicast | |
2097 | * addresses we subscribe to. Also, change the promiscuity of | |
2098 | * the device based on the flags (this function is called | |
2099 | * whenever dev->flags is changed */ | |
2100 | static void gfar_set_multi(struct net_device *dev) | |
2101 | { | |
2102 | struct dev_mc_list *mc_ptr; | |
2103 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 2104 | struct gfar __iomem *regs = priv->regs; |
1da177e4 LT |
2105 | u32 tempval; |
2106 | ||
2107 | if(dev->flags & IFF_PROMISC) { | |
1da177e4 LT |
2108 | /* Set RCTRL to PROM */ |
2109 | tempval = gfar_read(®s->rctrl); | |
2110 | tempval |= RCTRL_PROM; | |
2111 | gfar_write(®s->rctrl, tempval); | |
2112 | } else { | |
2113 | /* Set RCTRL to not PROM */ | |
2114 | tempval = gfar_read(®s->rctrl); | |
2115 | tempval &= ~(RCTRL_PROM); | |
2116 | gfar_write(®s->rctrl, tempval); | |
2117 | } | |
6aa20a22 | 2118 | |
1da177e4 LT |
2119 | if(dev->flags & IFF_ALLMULTI) { |
2120 | /* Set the hash to rx all multicast frames */ | |
0bbaf069 KG |
2121 | gfar_write(®s->igaddr0, 0xffffffff); |
2122 | gfar_write(®s->igaddr1, 0xffffffff); | |
2123 | gfar_write(®s->igaddr2, 0xffffffff); | |
2124 | gfar_write(®s->igaddr3, 0xffffffff); | |
2125 | gfar_write(®s->igaddr4, 0xffffffff); | |
2126 | gfar_write(®s->igaddr5, 0xffffffff); | |
2127 | gfar_write(®s->igaddr6, 0xffffffff); | |
2128 | gfar_write(®s->igaddr7, 0xffffffff); | |
1da177e4 LT |
2129 | gfar_write(®s->gaddr0, 0xffffffff); |
2130 | gfar_write(®s->gaddr1, 0xffffffff); | |
2131 | gfar_write(®s->gaddr2, 0xffffffff); | |
2132 | gfar_write(®s->gaddr3, 0xffffffff); | |
2133 | gfar_write(®s->gaddr4, 0xffffffff); | |
2134 | gfar_write(®s->gaddr5, 0xffffffff); | |
2135 | gfar_write(®s->gaddr6, 0xffffffff); | |
2136 | gfar_write(®s->gaddr7, 0xffffffff); | |
2137 | } else { | |
7f7f5316 AF |
2138 | int em_num; |
2139 | int idx; | |
2140 | ||
1da177e4 | 2141 | /* zero out the hash */ |
0bbaf069 KG |
2142 | gfar_write(®s->igaddr0, 0x0); |
2143 | gfar_write(®s->igaddr1, 0x0); | |
2144 | gfar_write(®s->igaddr2, 0x0); | |
2145 | gfar_write(®s->igaddr3, 0x0); | |
2146 | gfar_write(®s->igaddr4, 0x0); | |
2147 | gfar_write(®s->igaddr5, 0x0); | |
2148 | gfar_write(®s->igaddr6, 0x0); | |
2149 | gfar_write(®s->igaddr7, 0x0); | |
1da177e4 LT |
2150 | gfar_write(®s->gaddr0, 0x0); |
2151 | gfar_write(®s->gaddr1, 0x0); | |
2152 | gfar_write(®s->gaddr2, 0x0); | |
2153 | gfar_write(®s->gaddr3, 0x0); | |
2154 | gfar_write(®s->gaddr4, 0x0); | |
2155 | gfar_write(®s->gaddr5, 0x0); | |
2156 | gfar_write(®s->gaddr6, 0x0); | |
2157 | gfar_write(®s->gaddr7, 0x0); | |
2158 | ||
7f7f5316 AF |
2159 | /* If we have extended hash tables, we need to |
2160 | * clear the exact match registers to prepare for | |
2161 | * setting them */ | |
2162 | if (priv->extended_hash) { | |
2163 | em_num = GFAR_EM_NUM + 1; | |
2164 | gfar_clear_exact_match(dev); | |
2165 | idx = 1; | |
2166 | } else { | |
2167 | idx = 0; | |
2168 | em_num = 0; | |
2169 | } | |
2170 | ||
1da177e4 LT |
2171 | if(dev->mc_count == 0) |
2172 | return; | |
2173 | ||
2174 | /* Parse the list, and set the appropriate bits */ | |
2175 | for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) { | |
7f7f5316 AF |
2176 | if (idx < em_num) { |
2177 | gfar_set_mac_for_addr(dev, idx, | |
2178 | mc_ptr->dmi_addr); | |
2179 | idx++; | |
2180 | } else | |
2181 | gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr); | |
1da177e4 LT |
2182 | } |
2183 | } | |
2184 | ||
2185 | return; | |
2186 | } | |
2187 | ||
7f7f5316 AF |
2188 | |
2189 | /* Clears each of the exact match registers to zero, so they | |
2190 | * don't interfere with normal reception */ | |
2191 | static void gfar_clear_exact_match(struct net_device *dev) | |
2192 | { | |
2193 | int idx; | |
2194 | u8 zero_arr[MAC_ADDR_LEN] = {0,0,0,0,0,0}; | |
2195 | ||
2196 | for(idx = 1;idx < GFAR_EM_NUM + 1;idx++) | |
2197 | gfar_set_mac_for_addr(dev, idx, (u8 *)zero_arr); | |
2198 | } | |
2199 | ||
1da177e4 LT |
2200 | /* Set the appropriate hash bit for the given addr */ |
2201 | /* The algorithm works like so: | |
2202 | * 1) Take the Destination Address (ie the multicast address), and | |
2203 | * do a CRC on it (little endian), and reverse the bits of the | |
2204 | * result. | |
2205 | * 2) Use the 8 most significant bits as a hash into a 256-entry | |
2206 | * table. The table is controlled through 8 32-bit registers: | |
2207 | * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is | |
2208 | * gaddr7. This means that the 3 most significant bits in the | |
2209 | * hash index which gaddr register to use, and the 5 other bits | |
2210 | * indicate which bit (assuming an IBM numbering scheme, which | |
2211 | * for PowerPC (tm) is usually the case) in the register holds | |
2212 | * the entry. */ | |
2213 | static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr) | |
2214 | { | |
2215 | u32 tempval; | |
2216 | struct gfar_private *priv = netdev_priv(dev); | |
1da177e4 | 2217 | u32 result = ether_crc(MAC_ADDR_LEN, addr); |
0bbaf069 KG |
2218 | int width = priv->hash_width; |
2219 | u8 whichbit = (result >> (32 - width)) & 0x1f; | |
2220 | u8 whichreg = result >> (32 - width + 5); | |
1da177e4 LT |
2221 | u32 value = (1 << (31-whichbit)); |
2222 | ||
0bbaf069 | 2223 | tempval = gfar_read(priv->hash_regs[whichreg]); |
1da177e4 | 2224 | tempval |= value; |
0bbaf069 | 2225 | gfar_write(priv->hash_regs[whichreg], tempval); |
1da177e4 LT |
2226 | |
2227 | return; | |
2228 | } | |
2229 | ||
7f7f5316 AF |
2230 | |
2231 | /* There are multiple MAC Address register pairs on some controllers | |
2232 | * This function sets the numth pair to a given address | |
2233 | */ | |
2234 | static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr) | |
2235 | { | |
2236 | struct gfar_private *priv = netdev_priv(dev); | |
2237 | int idx; | |
2238 | char tmpbuf[MAC_ADDR_LEN]; | |
2239 | u32 tempval; | |
cc8c6e37 | 2240 | u32 __iomem *macptr = &priv->regs->macstnaddr1; |
7f7f5316 AF |
2241 | |
2242 | macptr += num*2; | |
2243 | ||
2244 | /* Now copy it into the mac registers backwards, cuz */ | |
2245 | /* little endian is silly */ | |
2246 | for (idx = 0; idx < MAC_ADDR_LEN; idx++) | |
2247 | tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx]; | |
2248 | ||
2249 | gfar_write(macptr, *((u32 *) (tmpbuf))); | |
2250 | ||
2251 | tempval = *((u32 *) (tmpbuf + 4)); | |
2252 | ||
2253 | gfar_write(macptr+1, tempval); | |
2254 | } | |
2255 | ||
1da177e4 | 2256 | /* GFAR error interrupt handler */ |
7d12e780 | 2257 | static irqreturn_t gfar_error(int irq, void *dev_id) |
1da177e4 LT |
2258 | { |
2259 | struct net_device *dev = dev_id; | |
2260 | struct gfar_private *priv = netdev_priv(dev); | |
2261 | ||
2262 | /* Save ievent for future reference */ | |
2263 | u32 events = gfar_read(&priv->regs->ievent); | |
2264 | ||
2265 | /* Clear IEVENT */ | |
d87eb127 SW |
2266 | gfar_write(&priv->regs->ievent, events & IEVENT_ERR_MASK); |
2267 | ||
2268 | /* Magic Packet is not an error. */ | |
b31a1d8b | 2269 | if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) && |
d87eb127 SW |
2270 | (events & IEVENT_MAG)) |
2271 | events &= ~IEVENT_MAG; | |
1da177e4 LT |
2272 | |
2273 | /* Hmm... */ | |
0bbaf069 KG |
2274 | if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv)) |
2275 | printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n", | |
538cc7ee | 2276 | dev->name, events, gfar_read(&priv->regs->imask)); |
1da177e4 LT |
2277 | |
2278 | /* Update the error counters */ | |
2279 | if (events & IEVENT_TXE) { | |
09f75cd7 | 2280 | dev->stats.tx_errors++; |
1da177e4 LT |
2281 | |
2282 | if (events & IEVENT_LC) | |
09f75cd7 | 2283 | dev->stats.tx_window_errors++; |
1da177e4 | 2284 | if (events & IEVENT_CRL) |
09f75cd7 | 2285 | dev->stats.tx_aborted_errors++; |
1da177e4 | 2286 | if (events & IEVENT_XFUN) { |
0bbaf069 | 2287 | if (netif_msg_tx_err(priv)) |
538cc7ee SS |
2288 | printk(KERN_DEBUG "%s: TX FIFO underrun, " |
2289 | "packet dropped.\n", dev->name); | |
09f75cd7 | 2290 | dev->stats.tx_dropped++; |
1da177e4 LT |
2291 | priv->extra_stats.tx_underrun++; |
2292 | ||
2293 | /* Reactivate the Tx Queues */ | |
2294 | gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); | |
2295 | } | |
0bbaf069 KG |
2296 | if (netif_msg_tx_err(priv)) |
2297 | printk(KERN_DEBUG "%s: Transmit Error\n", dev->name); | |
1da177e4 LT |
2298 | } |
2299 | if (events & IEVENT_BSY) { | |
09f75cd7 | 2300 | dev->stats.rx_errors++; |
1da177e4 LT |
2301 | priv->extra_stats.rx_bsy++; |
2302 | ||
7d12e780 | 2303 | gfar_receive(irq, dev_id); |
1da177e4 | 2304 | |
0bbaf069 | 2305 | if (netif_msg_rx_err(priv)) |
538cc7ee SS |
2306 | printk(KERN_DEBUG "%s: busy error (rstat: %x)\n", |
2307 | dev->name, gfar_read(&priv->regs->rstat)); | |
1da177e4 LT |
2308 | } |
2309 | if (events & IEVENT_BABR) { | |
09f75cd7 | 2310 | dev->stats.rx_errors++; |
1da177e4 LT |
2311 | priv->extra_stats.rx_babr++; |
2312 | ||
0bbaf069 | 2313 | if (netif_msg_rx_err(priv)) |
538cc7ee | 2314 | printk(KERN_DEBUG "%s: babbling RX error\n", dev->name); |
1da177e4 LT |
2315 | } |
2316 | if (events & IEVENT_EBERR) { | |
2317 | priv->extra_stats.eberr++; | |
0bbaf069 | 2318 | if (netif_msg_rx_err(priv)) |
538cc7ee | 2319 | printk(KERN_DEBUG "%s: bus error\n", dev->name); |
1da177e4 | 2320 | } |
0bbaf069 | 2321 | if ((events & IEVENT_RXC) && netif_msg_rx_status(priv)) |
538cc7ee | 2322 | printk(KERN_DEBUG "%s: control frame\n", dev->name); |
1da177e4 LT |
2323 | |
2324 | if (events & IEVENT_BABT) { | |
2325 | priv->extra_stats.tx_babt++; | |
0bbaf069 | 2326 | if (netif_msg_tx_err(priv)) |
538cc7ee | 2327 | printk(KERN_DEBUG "%s: babbling TX error\n", dev->name); |
1da177e4 LT |
2328 | } |
2329 | return IRQ_HANDLED; | |
2330 | } | |
2331 | ||
72abb461 KS |
2332 | /* work with hotplug and coldplug */ |
2333 | MODULE_ALIAS("platform:fsl-gianfar"); | |
2334 | ||
b31a1d8b AF |
2335 | static struct of_device_id gfar_match[] = |
2336 | { | |
2337 | { | |
2338 | .type = "network", | |
2339 | .compatible = "gianfar", | |
2340 | }, | |
2341 | {}, | |
2342 | }; | |
2343 | ||
1da177e4 | 2344 | /* Structure for a device driver */ |
b31a1d8b AF |
2345 | static struct of_platform_driver gfar_driver = { |
2346 | .name = "fsl-gianfar", | |
2347 | .match_table = gfar_match, | |
2348 | ||
1da177e4 LT |
2349 | .probe = gfar_probe, |
2350 | .remove = gfar_remove, | |
d87eb127 SW |
2351 | .suspend = gfar_suspend, |
2352 | .resume = gfar_resume, | |
1da177e4 LT |
2353 | }; |
2354 | ||
2355 | static int __init gfar_init(void) | |
2356 | { | |
1577ecef | 2357 | return of_register_platform_driver(&gfar_driver); |
1da177e4 LT |
2358 | } |
2359 | ||
2360 | static void __exit gfar_exit(void) | |
2361 | { | |
b31a1d8b | 2362 | of_unregister_platform_driver(&gfar_driver); |
1da177e4 LT |
2363 | } |
2364 | ||
2365 | module_init(gfar_init); | |
2366 | module_exit(gfar_exit); | |
2367 |