Commit | Line | Data |
---|---|---|
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 | ||
8728327e | 167 | static int gfar_init_bds(struct net_device *ndev) |
826aa4a0 | 168 | { |
8728327e | 169 | struct gfar_private *priv = netdev_priv(ndev); |
826aa4a0 AV |
170 | struct txbd8 *txbdp; |
171 | struct rxbd8 *rxbdp; | |
8728327e AV |
172 | int i; |
173 | ||
174 | /* Initialize some variables in our dev structure */ | |
175 | priv->num_txbdfree = priv->tx_ring_size; | |
176 | priv->dirty_tx = priv->cur_tx = priv->tx_bd_base; | |
177 | priv->cur_rx = priv->rx_bd_base; | |
178 | priv->skb_curtx = priv->skb_dirtytx = 0; | |
179 | priv->skb_currx = 0; | |
180 | ||
181 | /* Initialize Transmit Descriptor Ring */ | |
182 | txbdp = priv->tx_bd_base; | |
183 | for (i = 0; i < priv->tx_ring_size; i++) { | |
184 | txbdp->lstatus = 0; | |
185 | txbdp->bufPtr = 0; | |
186 | txbdp++; | |
187 | } | |
188 | ||
189 | /* Set the last descriptor in the ring to indicate wrap */ | |
190 | txbdp--; | |
191 | txbdp->status |= TXBD_WRAP; | |
192 | ||
193 | rxbdp = priv->rx_bd_base; | |
194 | for (i = 0; i < priv->rx_ring_size; i++) { | |
195 | struct sk_buff *skb = priv->rx_skbuff[i]; | |
196 | ||
197 | if (skb) { | |
198 | gfar_init_rxbdp(ndev, rxbdp, rxbdp->bufPtr); | |
199 | } else { | |
200 | skb = gfar_new_skb(ndev); | |
201 | if (!skb) { | |
202 | pr_err("%s: Can't allocate RX buffers\n", | |
203 | ndev->name); | |
204 | return -ENOMEM; | |
205 | } | |
206 | priv->rx_skbuff[i] = skb; | |
207 | ||
208 | gfar_new_rxbdp(ndev, rxbdp, skb); | |
209 | } | |
210 | ||
211 | rxbdp++; | |
212 | } | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | static int gfar_alloc_skb_resources(struct net_device *ndev) | |
218 | { | |
826aa4a0 AV |
219 | void *vaddr; |
220 | int i; | |
221 | struct gfar_private *priv = netdev_priv(ndev); | |
222 | struct device *dev = &priv->ofdev->dev; | |
826aa4a0 AV |
223 | |
224 | /* Allocate memory for the buffer descriptors */ | |
8728327e AV |
225 | vaddr = dma_alloc_coherent(dev, |
226 | sizeof(*priv->tx_bd_base) * priv->tx_ring_size + | |
227 | sizeof(*priv->rx_bd_base) * priv->rx_ring_size, | |
228 | &priv->tx_bd_dma_base, GFP_KERNEL); | |
826aa4a0 AV |
229 | if (!vaddr) { |
230 | if (netif_msg_ifup(priv)) | |
231 | pr_err("%s: Could not allocate buffer descriptors!\n", | |
232 | ndev->name); | |
233 | return -ENOMEM; | |
234 | } | |
235 | ||
236 | priv->tx_bd_base = vaddr; | |
237 | ||
826aa4a0 | 238 | /* Start the rx descriptor ring where the tx ring leaves off */ |
8728327e | 239 | vaddr = vaddr + sizeof(*priv->tx_bd_base) * priv->tx_ring_size; |
826aa4a0 | 240 | priv->rx_bd_base = vaddr; |
826aa4a0 AV |
241 | |
242 | /* Setup the skbuff rings */ | |
243 | priv->tx_skbuff = kmalloc(sizeof(*priv->tx_skbuff) * | |
244 | priv->tx_ring_size, GFP_KERNEL); | |
245 | if (!priv->tx_skbuff) { | |
246 | if (netif_msg_ifup(priv)) | |
247 | pr_err("%s: Could not allocate tx_skbuff\n", | |
248 | ndev->name); | |
249 | goto cleanup; | |
250 | } | |
251 | ||
252 | for (i = 0; i < priv->tx_ring_size; i++) | |
253 | priv->tx_skbuff[i] = NULL; | |
254 | ||
255 | priv->rx_skbuff = kmalloc(sizeof(*priv->rx_skbuff) * | |
256 | priv->rx_ring_size, GFP_KERNEL); | |
257 | if (!priv->rx_skbuff) { | |
258 | if (netif_msg_ifup(priv)) | |
259 | pr_err("%s: Could not allocate rx_skbuff\n", | |
260 | ndev->name); | |
261 | goto cleanup; | |
262 | } | |
263 | ||
264 | for (i = 0; i < priv->rx_ring_size; i++) | |
265 | priv->rx_skbuff[i] = NULL; | |
266 | ||
8728327e AV |
267 | if (gfar_init_bds(ndev)) |
268 | goto cleanup; | |
826aa4a0 AV |
269 | |
270 | return 0; | |
271 | ||
272 | cleanup: | |
273 | free_skb_resources(priv); | |
274 | return -ENOMEM; | |
275 | } | |
276 | ||
277 | static void gfar_init_mac(struct net_device *ndev) | |
278 | { | |
279 | struct gfar_private *priv = netdev_priv(ndev); | |
280 | struct gfar __iomem *regs = priv->regs; | |
281 | u32 rctrl = 0; | |
282 | u32 tctrl = 0; | |
283 | u32 attrs = 0; | |
284 | ||
32c513bc AV |
285 | /* enet DMA only understands physical addresses */ |
286 | gfar_write(®s->tbase0, priv->tx_bd_dma_base); | |
287 | gfar_write(®s->rbase0, priv->tx_bd_dma_base + | |
288 | sizeof(*priv->tx_bd_base) * | |
289 | priv->tx_ring_size); | |
290 | ||
826aa4a0 AV |
291 | /* Configure the coalescing support */ |
292 | gfar_write(®s->txic, 0); | |
293 | if (priv->txcoalescing) | |
294 | gfar_write(®s->txic, priv->txic); | |
295 | ||
296 | gfar_write(®s->rxic, 0); | |
297 | if (priv->rxcoalescing) | |
298 | gfar_write(®s->rxic, priv->rxic); | |
299 | ||
300 | if (priv->rx_csum_enable) | |
301 | rctrl |= RCTRL_CHECKSUMMING; | |
302 | ||
303 | if (priv->extended_hash) { | |
304 | rctrl |= RCTRL_EXTHASH; | |
305 | ||
306 | gfar_clear_exact_match(ndev); | |
307 | rctrl |= RCTRL_EMEN; | |
308 | } | |
309 | ||
310 | if (priv->padding) { | |
311 | rctrl &= ~RCTRL_PAL_MASK; | |
312 | rctrl |= RCTRL_PADDING(priv->padding); | |
313 | } | |
314 | ||
315 | /* keep vlan related bits if it's enabled */ | |
316 | if (priv->vlgrp) { | |
317 | rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT; | |
318 | tctrl |= TCTRL_VLINS; | |
319 | } | |
320 | ||
321 | /* Init rctrl based on our settings */ | |
322 | gfar_write(®s->rctrl, rctrl); | |
323 | ||
324 | if (ndev->features & NETIF_F_IP_CSUM) | |
325 | tctrl |= TCTRL_INIT_CSUM; | |
326 | ||
327 | gfar_write(®s->tctrl, tctrl); | |
328 | ||
329 | /* Set the extraction length and index */ | |
330 | attrs = ATTRELI_EL(priv->rx_stash_size) | | |
331 | ATTRELI_EI(priv->rx_stash_index); | |
332 | ||
333 | gfar_write(®s->attreli, attrs); | |
334 | ||
335 | /* Start with defaults, and add stashing or locking | |
336 | * depending on the approprate variables */ | |
337 | attrs = ATTR_INIT_SETTINGS; | |
338 | ||
339 | if (priv->bd_stash_en) | |
340 | attrs |= ATTR_BDSTASH; | |
341 | ||
342 | if (priv->rx_stash_size != 0) | |
343 | attrs |= ATTR_BUFSTASH; | |
344 | ||
345 | gfar_write(®s->attr, attrs); | |
346 | ||
347 | gfar_write(®s->fifo_tx_thr, priv->fifo_threshold); | |
348 | gfar_write(®s->fifo_tx_starve, priv->fifo_starve); | |
349 | gfar_write(®s->fifo_tx_starve_shutoff, priv->fifo_starve_off); | |
350 | } | |
351 | ||
26ccfc37 AF |
352 | static const struct net_device_ops gfar_netdev_ops = { |
353 | .ndo_open = gfar_enet_open, | |
354 | .ndo_start_xmit = gfar_start_xmit, | |
355 | .ndo_stop = gfar_close, | |
356 | .ndo_change_mtu = gfar_change_mtu, | |
357 | .ndo_set_multicast_list = gfar_set_multi, | |
358 | .ndo_tx_timeout = gfar_timeout, | |
359 | .ndo_do_ioctl = gfar_ioctl, | |
360 | .ndo_vlan_rx_register = gfar_vlan_rx_register, | |
240c102d BH |
361 | .ndo_set_mac_address = eth_mac_addr, |
362 | .ndo_validate_addr = eth_validate_addr, | |
26ccfc37 AF |
363 | #ifdef CONFIG_NET_POLL_CONTROLLER |
364 | .ndo_poll_controller = gfar_netpoll, | |
365 | #endif | |
366 | }; | |
367 | ||
7f7f5316 AF |
368 | /* Returns 1 if incoming frames use an FCB */ |
369 | static inline int gfar_uses_fcb(struct gfar_private *priv) | |
0bbaf069 | 370 | { |
77ecaf2d | 371 | return priv->vlgrp || priv->rx_csum_enable; |
0bbaf069 | 372 | } |
bb40dcbb | 373 | |
b31a1d8b AF |
374 | static int gfar_of_init(struct net_device *dev) |
375 | { | |
b31a1d8b AF |
376 | const char *model; |
377 | const char *ctype; | |
378 | const void *mac_addr; | |
b31a1d8b AF |
379 | u64 addr, size; |
380 | int err = 0; | |
381 | struct gfar_private *priv = netdev_priv(dev); | |
382 | struct device_node *np = priv->node; | |
4d7902f2 AF |
383 | const u32 *stash; |
384 | const u32 *stash_len; | |
385 | const u32 *stash_idx; | |
b31a1d8b AF |
386 | |
387 | if (!np || !of_device_is_available(np)) | |
388 | return -ENODEV; | |
389 | ||
390 | /* get a pointer to the register memory */ | |
391 | addr = of_translate_address(np, of_get_address(np, 0, &size, NULL)); | |
392 | priv->regs = ioremap(addr, size); | |
393 | ||
394 | if (priv->regs == NULL) | |
395 | return -ENOMEM; | |
396 | ||
397 | priv->interruptTransmit = irq_of_parse_and_map(np, 0); | |
398 | ||
399 | model = of_get_property(np, "model", NULL); | |
400 | ||
401 | /* If we aren't the FEC we have multiple interrupts */ | |
402 | if (model && strcasecmp(model, "FEC")) { | |
403 | priv->interruptReceive = irq_of_parse_and_map(np, 1); | |
404 | ||
405 | priv->interruptError = irq_of_parse_and_map(np, 2); | |
406 | ||
407 | if (priv->interruptTransmit < 0 || | |
408 | priv->interruptReceive < 0 || | |
409 | priv->interruptError < 0) { | |
410 | err = -EINVAL; | |
411 | goto err_out; | |
412 | } | |
413 | } | |
414 | ||
4d7902f2 AF |
415 | stash = of_get_property(np, "bd-stash", NULL); |
416 | ||
417 | if(stash) { | |
418 | priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING; | |
419 | priv->bd_stash_en = 1; | |
420 | } | |
421 | ||
422 | stash_len = of_get_property(np, "rx-stash-len", NULL); | |
423 | ||
424 | if (stash_len) | |
425 | priv->rx_stash_size = *stash_len; | |
426 | ||
427 | stash_idx = of_get_property(np, "rx-stash-idx", NULL); | |
428 | ||
429 | if (stash_idx) | |
430 | priv->rx_stash_index = *stash_idx; | |
431 | ||
432 | if (stash_len || stash_idx) | |
433 | priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING; | |
434 | ||
b31a1d8b AF |
435 | mac_addr = of_get_mac_address(np); |
436 | if (mac_addr) | |
437 | memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN); | |
438 | ||
439 | if (model && !strcasecmp(model, "TSEC")) | |
440 | priv->device_flags = | |
441 | FSL_GIANFAR_DEV_HAS_GIGABIT | | |
442 | FSL_GIANFAR_DEV_HAS_COALESCE | | |
443 | FSL_GIANFAR_DEV_HAS_RMON | | |
444 | FSL_GIANFAR_DEV_HAS_MULTI_INTR; | |
445 | if (model && !strcasecmp(model, "eTSEC")) | |
446 | priv->device_flags = | |
447 | FSL_GIANFAR_DEV_HAS_GIGABIT | | |
448 | FSL_GIANFAR_DEV_HAS_COALESCE | | |
449 | FSL_GIANFAR_DEV_HAS_RMON | | |
450 | FSL_GIANFAR_DEV_HAS_MULTI_INTR | | |
2c2db48a | 451 | FSL_GIANFAR_DEV_HAS_PADDING | |
b31a1d8b AF |
452 | FSL_GIANFAR_DEV_HAS_CSUM | |
453 | FSL_GIANFAR_DEV_HAS_VLAN | | |
454 | FSL_GIANFAR_DEV_HAS_MAGIC_PACKET | | |
455 | FSL_GIANFAR_DEV_HAS_EXTENDED_HASH; | |
456 | ||
457 | ctype = of_get_property(np, "phy-connection-type", NULL); | |
458 | ||
459 | /* We only care about rgmii-id. The rest are autodetected */ | |
460 | if (ctype && !strcmp(ctype, "rgmii-id")) | |
461 | priv->interface = PHY_INTERFACE_MODE_RGMII_ID; | |
462 | else | |
463 | priv->interface = PHY_INTERFACE_MODE_MII; | |
464 | ||
465 | if (of_get_property(np, "fsl,magic-packet", NULL)) | |
466 | priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET; | |
467 | ||
fe192a49 | 468 | priv->phy_node = of_parse_phandle(np, "phy-handle", 0); |
b31a1d8b AF |
469 | |
470 | /* Find the TBI PHY. If it's not there, we don't support SGMII */ | |
fe192a49 | 471 | priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0); |
b31a1d8b AF |
472 | |
473 | return 0; | |
474 | ||
475 | err_out: | |
476 | iounmap(priv->regs); | |
477 | return err; | |
478 | } | |
479 | ||
0faac9f7 CW |
480 | /* Ioctl MII Interface */ |
481 | static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
482 | { | |
483 | struct gfar_private *priv = netdev_priv(dev); | |
484 | ||
485 | if (!netif_running(dev)) | |
486 | return -EINVAL; | |
487 | ||
488 | if (!priv->phydev) | |
489 | return -ENODEV; | |
490 | ||
491 | return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd); | |
492 | } | |
493 | ||
bb40dcbb AF |
494 | /* Set up the ethernet device structure, private data, |
495 | * and anything else we need before we start */ | |
b31a1d8b AF |
496 | static int gfar_probe(struct of_device *ofdev, |
497 | const struct of_device_id *match) | |
1da177e4 LT |
498 | { |
499 | u32 tempval; | |
500 | struct net_device *dev = NULL; | |
501 | struct gfar_private *priv = NULL; | |
c50a5d9a DH |
502 | int err = 0; |
503 | int len_devname; | |
1da177e4 LT |
504 | |
505 | /* Create an ethernet device instance */ | |
506 | dev = alloc_etherdev(sizeof (*priv)); | |
507 | ||
bb40dcbb | 508 | if (NULL == dev) |
1da177e4 LT |
509 | return -ENOMEM; |
510 | ||
511 | priv = netdev_priv(dev); | |
4826857f KG |
512 | priv->ndev = dev; |
513 | priv->ofdev = ofdev; | |
b31a1d8b | 514 | priv->node = ofdev->node; |
4826857f | 515 | SET_NETDEV_DEV(dev, &ofdev->dev); |
1da177e4 | 516 | |
b31a1d8b | 517 | err = gfar_of_init(dev); |
1da177e4 | 518 | |
b31a1d8b | 519 | if (err) |
1da177e4 | 520 | goto regs_fail; |
1da177e4 | 521 | |
fef6108d AF |
522 | spin_lock_init(&priv->txlock); |
523 | spin_lock_init(&priv->rxlock); | |
d87eb127 | 524 | spin_lock_init(&priv->bflock); |
ab939905 | 525 | INIT_WORK(&priv->reset_task, gfar_reset_task); |
1da177e4 | 526 | |
b31a1d8b | 527 | dev_set_drvdata(&ofdev->dev, priv); |
1da177e4 LT |
528 | |
529 | /* Stop the DMA engine now, in case it was running before */ | |
530 | /* (The firmware could have used it, and left it running). */ | |
257d938a | 531 | gfar_halt(dev); |
1da177e4 LT |
532 | |
533 | /* Reset MAC layer */ | |
534 | gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET); | |
535 | ||
b98ac702 AF |
536 | /* We need to delay at least 3 TX clocks */ |
537 | udelay(2); | |
538 | ||
1da177e4 LT |
539 | tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW); |
540 | gfar_write(&priv->regs->maccfg1, tempval); | |
541 | ||
542 | /* Initialize MACCFG2. */ | |
543 | gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS); | |
544 | ||
545 | /* Initialize ECNTRL */ | |
546 | gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS); | |
547 | ||
1da177e4 LT |
548 | /* Set the dev->base_addr to the gfar reg region */ |
549 | dev->base_addr = (unsigned long) (priv->regs); | |
550 | ||
b31a1d8b | 551 | SET_NETDEV_DEV(dev, &ofdev->dev); |
1da177e4 LT |
552 | |
553 | /* Fill in the dev structure */ | |
1da177e4 | 554 | dev->watchdog_timeo = TX_TIMEOUT; |
bea3348e | 555 | netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT); |
1da177e4 | 556 | dev->mtu = 1500; |
1da177e4 | 557 | |
26ccfc37 | 558 | dev->netdev_ops = &gfar_netdev_ops; |
0bbaf069 KG |
559 | dev->ethtool_ops = &gfar_ethtool_ops; |
560 | ||
b31a1d8b | 561 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) { |
0bbaf069 | 562 | priv->rx_csum_enable = 1; |
4669bc90 | 563 | dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA; |
0bbaf069 KG |
564 | } else |
565 | priv->rx_csum_enable = 0; | |
566 | ||
567 | priv->vlgrp = NULL; | |
1da177e4 | 568 | |
26ccfc37 | 569 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) |
0bbaf069 | 570 | dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; |
0bbaf069 | 571 | |
b31a1d8b | 572 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) { |
0bbaf069 KG |
573 | priv->extended_hash = 1; |
574 | priv->hash_width = 9; | |
575 | ||
576 | priv->hash_regs[0] = &priv->regs->igaddr0; | |
577 | priv->hash_regs[1] = &priv->regs->igaddr1; | |
578 | priv->hash_regs[2] = &priv->regs->igaddr2; | |
579 | priv->hash_regs[3] = &priv->regs->igaddr3; | |
580 | priv->hash_regs[4] = &priv->regs->igaddr4; | |
581 | priv->hash_regs[5] = &priv->regs->igaddr5; | |
582 | priv->hash_regs[6] = &priv->regs->igaddr6; | |
583 | priv->hash_regs[7] = &priv->regs->igaddr7; | |
584 | priv->hash_regs[8] = &priv->regs->gaddr0; | |
585 | priv->hash_regs[9] = &priv->regs->gaddr1; | |
586 | priv->hash_regs[10] = &priv->regs->gaddr2; | |
587 | priv->hash_regs[11] = &priv->regs->gaddr3; | |
588 | priv->hash_regs[12] = &priv->regs->gaddr4; | |
589 | priv->hash_regs[13] = &priv->regs->gaddr5; | |
590 | priv->hash_regs[14] = &priv->regs->gaddr6; | |
591 | priv->hash_regs[15] = &priv->regs->gaddr7; | |
592 | ||
593 | } else { | |
594 | priv->extended_hash = 0; | |
595 | priv->hash_width = 8; | |
596 | ||
597 | priv->hash_regs[0] = &priv->regs->gaddr0; | |
1577ecef | 598 | priv->hash_regs[1] = &priv->regs->gaddr1; |
0bbaf069 KG |
599 | priv->hash_regs[2] = &priv->regs->gaddr2; |
600 | priv->hash_regs[3] = &priv->regs->gaddr3; | |
601 | priv->hash_regs[4] = &priv->regs->gaddr4; | |
602 | priv->hash_regs[5] = &priv->regs->gaddr5; | |
603 | priv->hash_regs[6] = &priv->regs->gaddr6; | |
604 | priv->hash_regs[7] = &priv->regs->gaddr7; | |
605 | } | |
606 | ||
b31a1d8b | 607 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING) |
0bbaf069 KG |
608 | priv->padding = DEFAULT_PADDING; |
609 | else | |
610 | priv->padding = 0; | |
611 | ||
0bbaf069 KG |
612 | if (dev->features & NETIF_F_IP_CSUM) |
613 | dev->hard_header_len += GMAC_FCB_LEN; | |
1da177e4 LT |
614 | |
615 | priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE; | |
1da177e4 LT |
616 | priv->tx_ring_size = DEFAULT_TX_RING_SIZE; |
617 | priv->rx_ring_size = DEFAULT_RX_RING_SIZE; | |
4669bc90 | 618 | priv->num_txbdfree = DEFAULT_TX_RING_SIZE; |
1da177e4 LT |
619 | |
620 | priv->txcoalescing = DEFAULT_TX_COALESCE; | |
b46a8454 | 621 | priv->txic = DEFAULT_TXIC; |
1da177e4 | 622 | priv->rxcoalescing = DEFAULT_RX_COALESCE; |
b46a8454 | 623 | priv->rxic = DEFAULT_RXIC; |
1da177e4 | 624 | |
0bbaf069 KG |
625 | /* Enable most messages by default */ |
626 | priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; | |
627 | ||
d3eab82b TP |
628 | /* Carrier starts down, phylib will bring it up */ |
629 | netif_carrier_off(dev); | |
630 | ||
1da177e4 LT |
631 | err = register_netdev(dev); |
632 | ||
633 | if (err) { | |
634 | printk(KERN_ERR "%s: Cannot register net device, aborting.\n", | |
635 | dev->name); | |
636 | goto register_fail; | |
637 | } | |
638 | ||
2884e5cc AV |
639 | device_init_wakeup(&dev->dev, |
640 | priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); | |
641 | ||
c50a5d9a DH |
642 | /* fill out IRQ number and name fields */ |
643 | len_devname = strlen(dev->name); | |
644 | strncpy(&priv->int_name_tx[0], dev->name, len_devname); | |
645 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
646 | strncpy(&priv->int_name_tx[len_devname], | |
647 | "_tx", sizeof("_tx") + 1); | |
648 | ||
649 | strncpy(&priv->int_name_rx[0], dev->name, len_devname); | |
650 | strncpy(&priv->int_name_rx[len_devname], | |
651 | "_rx", sizeof("_rx") + 1); | |
652 | ||
653 | strncpy(&priv->int_name_er[0], dev->name, len_devname); | |
654 | strncpy(&priv->int_name_er[len_devname], | |
655 | "_er", sizeof("_er") + 1); | |
656 | } else | |
657 | priv->int_name_tx[len_devname] = '\0'; | |
658 | ||
7f7f5316 AF |
659 | /* Create all the sysfs files */ |
660 | gfar_init_sysfs(dev); | |
661 | ||
1da177e4 | 662 | /* Print out the device info */ |
e174961c | 663 | printk(KERN_INFO DEVICE_NAME "%pM\n", dev->name, dev->dev_addr); |
1da177e4 LT |
664 | |
665 | /* Even more device info helps when determining which kernel */ | |
7f7f5316 | 666 | /* provided which set of benchmarks. */ |
1da177e4 | 667 | printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name); |
1da177e4 LT |
668 | printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n", |
669 | dev->name, priv->rx_ring_size, priv->tx_ring_size); | |
670 | ||
671 | return 0; | |
672 | ||
673 | register_fail: | |
cc8c6e37 | 674 | iounmap(priv->regs); |
1da177e4 | 675 | regs_fail: |
fe192a49 GL |
676 | if (priv->phy_node) |
677 | of_node_put(priv->phy_node); | |
678 | if (priv->tbi_node) | |
679 | of_node_put(priv->tbi_node); | |
1da177e4 | 680 | free_netdev(dev); |
bb40dcbb | 681 | return err; |
1da177e4 LT |
682 | } |
683 | ||
b31a1d8b | 684 | static int gfar_remove(struct of_device *ofdev) |
1da177e4 | 685 | { |
b31a1d8b | 686 | struct gfar_private *priv = dev_get_drvdata(&ofdev->dev); |
1da177e4 | 687 | |
fe192a49 GL |
688 | if (priv->phy_node) |
689 | of_node_put(priv->phy_node); | |
690 | if (priv->tbi_node) | |
691 | of_node_put(priv->tbi_node); | |
692 | ||
b31a1d8b | 693 | dev_set_drvdata(&ofdev->dev, NULL); |
1da177e4 | 694 | |
d9d8e041 | 695 | unregister_netdev(priv->ndev); |
cc8c6e37 | 696 | iounmap(priv->regs); |
4826857f | 697 | free_netdev(priv->ndev); |
1da177e4 LT |
698 | |
699 | return 0; | |
700 | } | |
701 | ||
d87eb127 | 702 | #ifdef CONFIG_PM |
be926fc4 AV |
703 | |
704 | static int gfar_suspend(struct device *dev) | |
d87eb127 | 705 | { |
be926fc4 AV |
706 | struct gfar_private *priv = dev_get_drvdata(dev); |
707 | struct net_device *ndev = priv->ndev; | |
d87eb127 SW |
708 | unsigned long flags; |
709 | u32 tempval; | |
710 | ||
711 | int magic_packet = priv->wol_en && | |
b31a1d8b | 712 | (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); |
d87eb127 | 713 | |
be926fc4 | 714 | netif_device_detach(ndev); |
d87eb127 | 715 | |
be926fc4 | 716 | if (netif_running(ndev)) { |
d87eb127 SW |
717 | spin_lock_irqsave(&priv->txlock, flags); |
718 | spin_lock(&priv->rxlock); | |
719 | ||
be926fc4 | 720 | gfar_halt_nodisable(ndev); |
d87eb127 SW |
721 | |
722 | /* Disable Tx, and Rx if wake-on-LAN is disabled. */ | |
723 | tempval = gfar_read(&priv->regs->maccfg1); | |
724 | ||
725 | tempval &= ~MACCFG1_TX_EN; | |
726 | ||
727 | if (!magic_packet) | |
728 | tempval &= ~MACCFG1_RX_EN; | |
729 | ||
730 | gfar_write(&priv->regs->maccfg1, tempval); | |
731 | ||
732 | spin_unlock(&priv->rxlock); | |
733 | spin_unlock_irqrestore(&priv->txlock, flags); | |
734 | ||
d87eb127 | 735 | napi_disable(&priv->napi); |
d87eb127 SW |
736 | |
737 | if (magic_packet) { | |
738 | /* Enable interrupt on Magic Packet */ | |
739 | gfar_write(&priv->regs->imask, IMASK_MAG); | |
740 | ||
741 | /* Enable Magic Packet mode */ | |
742 | tempval = gfar_read(&priv->regs->maccfg2); | |
743 | tempval |= MACCFG2_MPEN; | |
744 | gfar_write(&priv->regs->maccfg2, tempval); | |
745 | } else { | |
746 | phy_stop(priv->phydev); | |
747 | } | |
748 | } | |
749 | ||
750 | return 0; | |
751 | } | |
752 | ||
be926fc4 | 753 | static int gfar_resume(struct device *dev) |
d87eb127 | 754 | { |
be926fc4 AV |
755 | struct gfar_private *priv = dev_get_drvdata(dev); |
756 | struct net_device *ndev = priv->ndev; | |
d87eb127 SW |
757 | unsigned long flags; |
758 | u32 tempval; | |
759 | int magic_packet = priv->wol_en && | |
b31a1d8b | 760 | (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); |
d87eb127 | 761 | |
be926fc4 AV |
762 | if (!netif_running(ndev)) { |
763 | netif_device_attach(ndev); | |
d87eb127 SW |
764 | return 0; |
765 | } | |
766 | ||
767 | if (!magic_packet && priv->phydev) | |
768 | phy_start(priv->phydev); | |
769 | ||
770 | /* Disable Magic Packet mode, in case something | |
771 | * else woke us up. | |
772 | */ | |
773 | ||
774 | spin_lock_irqsave(&priv->txlock, flags); | |
775 | spin_lock(&priv->rxlock); | |
776 | ||
777 | tempval = gfar_read(&priv->regs->maccfg2); | |
778 | tempval &= ~MACCFG2_MPEN; | |
779 | gfar_write(&priv->regs->maccfg2, tempval); | |
780 | ||
be926fc4 | 781 | gfar_start(ndev); |
d87eb127 SW |
782 | |
783 | spin_unlock(&priv->rxlock); | |
784 | spin_unlock_irqrestore(&priv->txlock, flags); | |
785 | ||
be926fc4 AV |
786 | netif_device_attach(ndev); |
787 | ||
788 | napi_enable(&priv->napi); | |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
793 | static int gfar_restore(struct device *dev) | |
794 | { | |
795 | struct gfar_private *priv = dev_get_drvdata(dev); | |
796 | struct net_device *ndev = priv->ndev; | |
797 | ||
798 | if (!netif_running(ndev)) | |
799 | return 0; | |
800 | ||
801 | gfar_init_bds(ndev); | |
802 | init_registers(ndev); | |
803 | gfar_set_mac_address(ndev); | |
804 | gfar_init_mac(ndev); | |
805 | gfar_start(ndev); | |
806 | ||
807 | priv->oldlink = 0; | |
808 | priv->oldspeed = 0; | |
809 | priv->oldduplex = -1; | |
810 | ||
811 | if (priv->phydev) | |
812 | phy_start(priv->phydev); | |
d87eb127 | 813 | |
be926fc4 | 814 | netif_device_attach(ndev); |
d87eb127 | 815 | napi_enable(&priv->napi); |
d87eb127 SW |
816 | |
817 | return 0; | |
818 | } | |
be926fc4 AV |
819 | |
820 | static struct dev_pm_ops gfar_pm_ops = { | |
821 | .suspend = gfar_suspend, | |
822 | .resume = gfar_resume, | |
823 | .freeze = gfar_suspend, | |
824 | .thaw = gfar_resume, | |
825 | .restore = gfar_restore, | |
826 | }; | |
827 | ||
828 | #define GFAR_PM_OPS (&gfar_pm_ops) | |
829 | ||
830 | static int gfar_legacy_suspend(struct of_device *ofdev, pm_message_t state) | |
831 | { | |
832 | return gfar_suspend(&ofdev->dev); | |
833 | } | |
834 | ||
835 | static int gfar_legacy_resume(struct of_device *ofdev) | |
836 | { | |
837 | return gfar_resume(&ofdev->dev); | |
838 | } | |
839 | ||
d87eb127 | 840 | #else |
be926fc4 AV |
841 | |
842 | #define GFAR_PM_OPS NULL | |
843 | #define gfar_legacy_suspend NULL | |
844 | #define gfar_legacy_resume NULL | |
845 | ||
d87eb127 | 846 | #endif |
1da177e4 | 847 | |
e8a2b6a4 AF |
848 | /* Reads the controller's registers to determine what interface |
849 | * connects it to the PHY. | |
850 | */ | |
851 | static phy_interface_t gfar_get_interface(struct net_device *dev) | |
852 | { | |
853 | struct gfar_private *priv = netdev_priv(dev); | |
854 | u32 ecntrl = gfar_read(&priv->regs->ecntrl); | |
855 | ||
856 | if (ecntrl & ECNTRL_SGMII_MODE) | |
857 | return PHY_INTERFACE_MODE_SGMII; | |
858 | ||
859 | if (ecntrl & ECNTRL_TBI_MODE) { | |
860 | if (ecntrl & ECNTRL_REDUCED_MODE) | |
861 | return PHY_INTERFACE_MODE_RTBI; | |
862 | else | |
863 | return PHY_INTERFACE_MODE_TBI; | |
864 | } | |
865 | ||
866 | if (ecntrl & ECNTRL_REDUCED_MODE) { | |
867 | if (ecntrl & ECNTRL_REDUCED_MII_MODE) | |
868 | return PHY_INTERFACE_MODE_RMII; | |
7132ab7f | 869 | else { |
b31a1d8b | 870 | phy_interface_t interface = priv->interface; |
7132ab7f AF |
871 | |
872 | /* | |
873 | * This isn't autodetected right now, so it must | |
874 | * be set by the device tree or platform code. | |
875 | */ | |
876 | if (interface == PHY_INTERFACE_MODE_RGMII_ID) | |
877 | return PHY_INTERFACE_MODE_RGMII_ID; | |
878 | ||
e8a2b6a4 | 879 | return PHY_INTERFACE_MODE_RGMII; |
7132ab7f | 880 | } |
e8a2b6a4 AF |
881 | } |
882 | ||
b31a1d8b | 883 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT) |
e8a2b6a4 AF |
884 | return PHY_INTERFACE_MODE_GMII; |
885 | ||
886 | return PHY_INTERFACE_MODE_MII; | |
887 | } | |
888 | ||
889 | ||
bb40dcbb AF |
890 | /* Initializes driver's PHY state, and attaches to the PHY. |
891 | * Returns 0 on success. | |
1da177e4 LT |
892 | */ |
893 | static int init_phy(struct net_device *dev) | |
894 | { | |
895 | struct gfar_private *priv = netdev_priv(dev); | |
bb40dcbb | 896 | uint gigabit_support = |
b31a1d8b | 897 | priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ? |
bb40dcbb | 898 | SUPPORTED_1000baseT_Full : 0; |
e8a2b6a4 | 899 | phy_interface_t interface; |
1da177e4 LT |
900 | |
901 | priv->oldlink = 0; | |
902 | priv->oldspeed = 0; | |
903 | priv->oldduplex = -1; | |
904 | ||
e8a2b6a4 AF |
905 | interface = gfar_get_interface(dev); |
906 | ||
1db780f8 AV |
907 | priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0, |
908 | interface); | |
909 | if (!priv->phydev) | |
910 | priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link, | |
911 | interface); | |
912 | if (!priv->phydev) { | |
913 | dev_err(&dev->dev, "could not attach to PHY\n"); | |
914 | return -ENODEV; | |
fe192a49 | 915 | } |
1da177e4 | 916 | |
d3c12873 KJ |
917 | if (interface == PHY_INTERFACE_MODE_SGMII) |
918 | gfar_configure_serdes(dev); | |
919 | ||
bb40dcbb | 920 | /* Remove any features not supported by the controller */ |
fe192a49 GL |
921 | priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support); |
922 | priv->phydev->advertising = priv->phydev->supported; | |
1da177e4 LT |
923 | |
924 | return 0; | |
1da177e4 LT |
925 | } |
926 | ||
d0313587 PG |
927 | /* |
928 | * Initialize TBI PHY interface for communicating with the | |
929 | * SERDES lynx PHY on the chip. We communicate with this PHY | |
930 | * through the MDIO bus on each controller, treating it as a | |
931 | * "normal" PHY at the address found in the TBIPA register. We assume | |
932 | * that the TBIPA register is valid. Either the MDIO bus code will set | |
933 | * it to a value that doesn't conflict with other PHYs on the bus, or the | |
934 | * value doesn't matter, as there are no other PHYs on the bus. | |
935 | */ | |
d3c12873 KJ |
936 | static void gfar_configure_serdes(struct net_device *dev) |
937 | { | |
938 | struct gfar_private *priv = netdev_priv(dev); | |
fe192a49 GL |
939 | struct phy_device *tbiphy; |
940 | ||
941 | if (!priv->tbi_node) { | |
942 | dev_warn(&dev->dev, "error: SGMII mode requires that the " | |
943 | "device tree specify a tbi-handle\n"); | |
944 | return; | |
945 | } | |
c132419e | 946 | |
fe192a49 GL |
947 | tbiphy = of_phy_find_device(priv->tbi_node); |
948 | if (!tbiphy) { | |
949 | dev_err(&dev->dev, "error: Could not get TBI device\n"); | |
b31a1d8b AF |
950 | return; |
951 | } | |
d3c12873 | 952 | |
b31a1d8b AF |
953 | /* |
954 | * If the link is already up, we must already be ok, and don't need to | |
bdb59f94 TP |
955 | * configure and reset the TBI<->SerDes link. Maybe U-Boot configured |
956 | * everything for us? Resetting it takes the link down and requires | |
957 | * several seconds for it to come back. | |
958 | */ | |
fe192a49 | 959 | if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS) |
b31a1d8b | 960 | return; |
d3c12873 | 961 | |
d0313587 | 962 | /* Single clk mode, mii mode off(for serdes communication) */ |
fe192a49 | 963 | phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT); |
d3c12873 | 964 | |
fe192a49 | 965 | phy_write(tbiphy, MII_ADVERTISE, |
d3c12873 KJ |
966 | ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | |
967 | ADVERTISE_1000XPSE_ASYM); | |
968 | ||
fe192a49 | 969 | phy_write(tbiphy, MII_BMCR, BMCR_ANENABLE | |
d3c12873 KJ |
970 | BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000); |
971 | } | |
972 | ||
1da177e4 LT |
973 | static void init_registers(struct net_device *dev) |
974 | { | |
975 | struct gfar_private *priv = netdev_priv(dev); | |
976 | ||
977 | /* Clear IEVENT */ | |
978 | gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR); | |
979 | ||
980 | /* Initialize IMASK */ | |
981 | gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR); | |
982 | ||
983 | /* Init hash registers to zero */ | |
0bbaf069 KG |
984 | gfar_write(&priv->regs->igaddr0, 0); |
985 | gfar_write(&priv->regs->igaddr1, 0); | |
986 | gfar_write(&priv->regs->igaddr2, 0); | |
987 | gfar_write(&priv->regs->igaddr3, 0); | |
988 | gfar_write(&priv->regs->igaddr4, 0); | |
989 | gfar_write(&priv->regs->igaddr5, 0); | |
990 | gfar_write(&priv->regs->igaddr6, 0); | |
991 | gfar_write(&priv->regs->igaddr7, 0); | |
1da177e4 LT |
992 | |
993 | gfar_write(&priv->regs->gaddr0, 0); | |
994 | gfar_write(&priv->regs->gaddr1, 0); | |
995 | gfar_write(&priv->regs->gaddr2, 0); | |
996 | gfar_write(&priv->regs->gaddr3, 0); | |
997 | gfar_write(&priv->regs->gaddr4, 0); | |
998 | gfar_write(&priv->regs->gaddr5, 0); | |
999 | gfar_write(&priv->regs->gaddr6, 0); | |
1000 | gfar_write(&priv->regs->gaddr7, 0); | |
1001 | ||
1da177e4 | 1002 | /* Zero out the rmon mib registers if it has them */ |
b31a1d8b | 1003 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { |
cc8c6e37 | 1004 | memset_io(&(priv->regs->rmon), 0, sizeof (struct rmon_mib)); |
1da177e4 LT |
1005 | |
1006 | /* Mask off the CAM interrupts */ | |
1007 | gfar_write(&priv->regs->rmon.cam1, 0xffffffff); | |
1008 | gfar_write(&priv->regs->rmon.cam2, 0xffffffff); | |
1009 | } | |
1010 | ||
1011 | /* Initialize the max receive buffer length */ | |
1012 | gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); | |
1013 | ||
1da177e4 LT |
1014 | /* Initialize the Minimum Frame Length Register */ |
1015 | gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS); | |
1da177e4 LT |
1016 | } |
1017 | ||
0bbaf069 KG |
1018 | |
1019 | /* Halt the receive and transmit queues */ | |
d87eb127 | 1020 | static void gfar_halt_nodisable(struct net_device *dev) |
1da177e4 LT |
1021 | { |
1022 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 1023 | struct gfar __iomem *regs = priv->regs; |
1da177e4 LT |
1024 | u32 tempval; |
1025 | ||
1da177e4 LT |
1026 | /* Mask all interrupts */ |
1027 | gfar_write(®s->imask, IMASK_INIT_CLEAR); | |
1028 | ||
1029 | /* Clear all interrupts */ | |
1030 | gfar_write(®s->ievent, IEVENT_INIT_CLEAR); | |
1031 | ||
1032 | /* Stop the DMA, and wait for it to stop */ | |
1033 | tempval = gfar_read(&priv->regs->dmactrl); | |
1034 | if ((tempval & (DMACTRL_GRS | DMACTRL_GTS)) | |
1035 | != (DMACTRL_GRS | DMACTRL_GTS)) { | |
1036 | tempval |= (DMACTRL_GRS | DMACTRL_GTS); | |
1037 | gfar_write(&priv->regs->dmactrl, tempval); | |
1038 | ||
1039 | while (!(gfar_read(&priv->regs->ievent) & | |
1040 | (IEVENT_GRSC | IEVENT_GTSC))) | |
1041 | cpu_relax(); | |
1042 | } | |
d87eb127 | 1043 | } |
d87eb127 SW |
1044 | |
1045 | /* Halt the receive and transmit queues */ | |
1046 | void gfar_halt(struct net_device *dev) | |
1047 | { | |
1048 | struct gfar_private *priv = netdev_priv(dev); | |
1049 | struct gfar __iomem *regs = priv->regs; | |
1050 | u32 tempval; | |
1da177e4 | 1051 | |
2a54adc3 SW |
1052 | gfar_halt_nodisable(dev); |
1053 | ||
1da177e4 LT |
1054 | /* Disable Rx and Tx */ |
1055 | tempval = gfar_read(®s->maccfg1); | |
1056 | tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN); | |
1057 | gfar_write(®s->maccfg1, tempval); | |
0bbaf069 KG |
1058 | } |
1059 | ||
1060 | void stop_gfar(struct net_device *dev) | |
1061 | { | |
1062 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 KG |
1063 | unsigned long flags; |
1064 | ||
bb40dcbb AF |
1065 | phy_stop(priv->phydev); |
1066 | ||
0bbaf069 | 1067 | /* Lock it down */ |
fef6108d AF |
1068 | spin_lock_irqsave(&priv->txlock, flags); |
1069 | spin_lock(&priv->rxlock); | |
0bbaf069 | 1070 | |
0bbaf069 | 1071 | gfar_halt(dev); |
1da177e4 | 1072 | |
fef6108d AF |
1073 | spin_unlock(&priv->rxlock); |
1074 | spin_unlock_irqrestore(&priv->txlock, flags); | |
1da177e4 LT |
1075 | |
1076 | /* Free the IRQs */ | |
b31a1d8b | 1077 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { |
1da177e4 LT |
1078 | free_irq(priv->interruptError, dev); |
1079 | free_irq(priv->interruptTransmit, dev); | |
1080 | free_irq(priv->interruptReceive, dev); | |
1081 | } else { | |
1577ecef | 1082 | free_irq(priv->interruptTransmit, dev); |
1da177e4 LT |
1083 | } |
1084 | ||
1085 | free_skb_resources(priv); | |
1da177e4 LT |
1086 | } |
1087 | ||
1088 | /* If there are any tx skbs or rx skbs still around, free them. | |
1089 | * Then free tx_skbuff and rx_skbuff */ | |
bb40dcbb | 1090 | static void free_skb_resources(struct gfar_private *priv) |
1da177e4 | 1091 | { |
e69edd21 | 1092 | struct device *dev = &priv->ofdev->dev; |
1da177e4 LT |
1093 | struct rxbd8 *rxbdp; |
1094 | struct txbd8 *txbdp; | |
4669bc90 | 1095 | int i, j; |
1da177e4 LT |
1096 | |
1097 | /* Go through all the buffer descriptors and free their data buffers */ | |
1098 | txbdp = priv->tx_bd_base; | |
1099 | ||
e69edd21 AV |
1100 | if (!priv->tx_skbuff) |
1101 | goto skip_tx_skbuff; | |
1102 | ||
1da177e4 | 1103 | for (i = 0; i < priv->tx_ring_size; i++) { |
4669bc90 DH |
1104 | if (!priv->tx_skbuff[i]) |
1105 | continue; | |
1da177e4 | 1106 | |
4826857f | 1107 | dma_unmap_single(&priv->ofdev->dev, txbdp->bufPtr, |
4669bc90 DH |
1108 | txbdp->length, DMA_TO_DEVICE); |
1109 | txbdp->lstatus = 0; | |
1110 | for (j = 0; j < skb_shinfo(priv->tx_skbuff[i])->nr_frags; j++) { | |
1111 | txbdp++; | |
4826857f | 1112 | dma_unmap_page(&priv->ofdev->dev, txbdp->bufPtr, |
4669bc90 | 1113 | txbdp->length, DMA_TO_DEVICE); |
1da177e4 | 1114 | } |
ad5da7ab | 1115 | txbdp++; |
4669bc90 DH |
1116 | dev_kfree_skb_any(priv->tx_skbuff[i]); |
1117 | priv->tx_skbuff[i] = NULL; | |
1da177e4 LT |
1118 | } |
1119 | ||
1120 | kfree(priv->tx_skbuff); | |
e69edd21 | 1121 | skip_tx_skbuff: |
1da177e4 LT |
1122 | |
1123 | rxbdp = priv->rx_bd_base; | |
1124 | ||
e69edd21 AV |
1125 | if (!priv->rx_skbuff) |
1126 | goto skip_rx_skbuff; | |
1da177e4 | 1127 | |
e69edd21 AV |
1128 | for (i = 0; i < priv->rx_ring_size; i++) { |
1129 | if (priv->rx_skbuff[i]) { | |
1130 | dma_unmap_single(&priv->ofdev->dev, rxbdp->bufPtr, | |
1131 | priv->rx_buffer_size, | |
1132 | DMA_FROM_DEVICE); | |
1133 | dev_kfree_skb_any(priv->rx_skbuff[i]); | |
1134 | priv->rx_skbuff[i] = NULL; | |
1da177e4 LT |
1135 | } |
1136 | ||
e69edd21 AV |
1137 | rxbdp->lstatus = 0; |
1138 | rxbdp->bufPtr = 0; | |
1139 | rxbdp++; | |
1da177e4 | 1140 | } |
e69edd21 AV |
1141 | |
1142 | kfree(priv->rx_skbuff); | |
1143 | skip_rx_skbuff: | |
1144 | ||
1145 | dma_free_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size + | |
1146 | sizeof(*rxbdp) * priv->rx_ring_size, | |
32c513bc | 1147 | priv->tx_bd_base, priv->tx_bd_dma_base); |
1da177e4 LT |
1148 | } |
1149 | ||
0bbaf069 KG |
1150 | void gfar_start(struct net_device *dev) |
1151 | { | |
1152 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 1153 | struct gfar __iomem *regs = priv->regs; |
0bbaf069 KG |
1154 | u32 tempval; |
1155 | ||
1156 | /* Enable Rx and Tx in MACCFG1 */ | |
1157 | tempval = gfar_read(®s->maccfg1); | |
1158 | tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN); | |
1159 | gfar_write(®s->maccfg1, tempval); | |
1160 | ||
1161 | /* Initialize DMACTRL to have WWR and WOP */ | |
1162 | tempval = gfar_read(&priv->regs->dmactrl); | |
1163 | tempval |= DMACTRL_INIT_SETTINGS; | |
1164 | gfar_write(&priv->regs->dmactrl, tempval); | |
1165 | ||
0bbaf069 KG |
1166 | /* Make sure we aren't stopped */ |
1167 | tempval = gfar_read(&priv->regs->dmactrl); | |
1168 | tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); | |
1169 | gfar_write(&priv->regs->dmactrl, tempval); | |
1170 | ||
fef6108d AF |
1171 | /* Clear THLT/RHLT, so that the DMA starts polling now */ |
1172 | gfar_write(®s->tstat, TSTAT_CLEAR_THALT); | |
1173 | gfar_write(®s->rstat, RSTAT_CLEAR_RHALT); | |
1174 | ||
0bbaf069 KG |
1175 | /* Unmask the interrupts we look for */ |
1176 | gfar_write(®s->imask, IMASK_DEFAULT); | |
12dea57b DH |
1177 | |
1178 | dev->trans_start = jiffies; | |
0bbaf069 KG |
1179 | } |
1180 | ||
1da177e4 | 1181 | /* Bring the controller up and running */ |
ccc05c6e | 1182 | int startup_gfar(struct net_device *ndev) |
1da177e4 | 1183 | { |
ccc05c6e | 1184 | struct gfar_private *priv = netdev_priv(ndev); |
cc8c6e37 | 1185 | struct gfar __iomem *regs = priv->regs; |
ccc05c6e | 1186 | int err; |
1da177e4 LT |
1187 | |
1188 | gfar_write(®s->imask, IMASK_INIT_CLEAR); | |
1189 | ||
826aa4a0 AV |
1190 | err = gfar_alloc_skb_resources(ndev); |
1191 | if (err) | |
1192 | return err; | |
815b97c6 | 1193 | |
826aa4a0 | 1194 | gfar_init_mac(ndev); |
1da177e4 | 1195 | |
1da177e4 LT |
1196 | /* If the device has multiple interrupts, register for |
1197 | * them. Otherwise, only register for the one */ | |
b31a1d8b | 1198 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { |
0bbaf069 | 1199 | /* Install our interrupt handlers for Error, |
1da177e4 | 1200 | * Transmit, and Receive */ |
ccc05c6e AV |
1201 | err = request_irq(priv->interruptError, gfar_error, 0, |
1202 | priv->int_name_er, ndev); | |
1203 | if (err) { | |
0bbaf069 | 1204 | if (netif_msg_intr(priv)) |
ccc05c6e AV |
1205 | pr_err("%s: Can't get IRQ %d\n", ndev->name, |
1206 | priv->interruptError); | |
1da177e4 LT |
1207 | goto err_irq_fail; |
1208 | } | |
1209 | ||
ccc05c6e AV |
1210 | err = request_irq(priv->interruptTransmit, gfar_transmit, 0, |
1211 | priv->int_name_tx, ndev); | |
1212 | if (err) { | |
0bbaf069 | 1213 | if (netif_msg_intr(priv)) |
ccc05c6e AV |
1214 | pr_err("%s: Can't get IRQ %d\n", ndev->name, |
1215 | priv->interruptTransmit); | |
1da177e4 LT |
1216 | goto tx_irq_fail; |
1217 | } | |
1218 | ||
ccc05c6e AV |
1219 | err = request_irq(priv->interruptReceive, gfar_receive, 0, |
1220 | priv->int_name_rx, ndev); | |
1221 | if (err) { | |
0bbaf069 | 1222 | if (netif_msg_intr(priv)) |
ccc05c6e AV |
1223 | pr_err("%s: Can't get IRQ %d (receive0)\n", |
1224 | ndev->name, priv->interruptReceive); | |
1da177e4 LT |
1225 | goto rx_irq_fail; |
1226 | } | |
1227 | } else { | |
ccc05c6e AV |
1228 | err = request_irq(priv->interruptTransmit, gfar_interrupt, |
1229 | 0, priv->int_name_tx, ndev); | |
1230 | if (err) { | |
0bbaf069 | 1231 | if (netif_msg_intr(priv)) |
ccc05c6e AV |
1232 | pr_err("%s: Can't get IRQ %d\n", ndev->name, |
1233 | priv->interruptTransmit); | |
1da177e4 LT |
1234 | goto err_irq_fail; |
1235 | } | |
1236 | } | |
1237 | ||
7f7f5316 | 1238 | /* Start the controller */ |
ccc05c6e | 1239 | gfar_start(ndev); |
1da177e4 | 1240 | |
826aa4a0 AV |
1241 | phy_start(priv->phydev); |
1242 | ||
1da177e4 LT |
1243 | return 0; |
1244 | ||
1245 | rx_irq_fail: | |
ccc05c6e | 1246 | free_irq(priv->interruptTransmit, ndev); |
1da177e4 | 1247 | tx_irq_fail: |
ccc05c6e | 1248 | free_irq(priv->interruptError, ndev); |
1da177e4 | 1249 | err_irq_fail: |
e69edd21 | 1250 | free_skb_resources(priv); |
1da177e4 LT |
1251 | return err; |
1252 | } | |
1253 | ||
1254 | /* Called when something needs to use the ethernet device */ | |
1255 | /* Returns 0 for success. */ | |
1256 | static int gfar_enet_open(struct net_device *dev) | |
1257 | { | |
94e8cc35 | 1258 | struct gfar_private *priv = netdev_priv(dev); |
1da177e4 LT |
1259 | int err; |
1260 | ||
bea3348e SH |
1261 | napi_enable(&priv->napi); |
1262 | ||
0fd56bb5 AF |
1263 | skb_queue_head_init(&priv->rx_recycle); |
1264 | ||
1da177e4 LT |
1265 | /* Initialize a bunch of registers */ |
1266 | init_registers(dev); | |
1267 | ||
1268 | gfar_set_mac_address(dev); | |
1269 | ||
1270 | err = init_phy(dev); | |
1271 | ||
bea3348e SH |
1272 | if(err) { |
1273 | napi_disable(&priv->napi); | |
1da177e4 | 1274 | return err; |
bea3348e | 1275 | } |
1da177e4 LT |
1276 | |
1277 | err = startup_gfar(dev); | |
db0e8e3f | 1278 | if (err) { |
bea3348e | 1279 | napi_disable(&priv->napi); |
db0e8e3f AV |
1280 | return err; |
1281 | } | |
1da177e4 LT |
1282 | |
1283 | netif_start_queue(dev); | |
1284 | ||
2884e5cc AV |
1285 | device_set_wakeup_enable(&dev->dev, priv->wol_en); |
1286 | ||
1da177e4 LT |
1287 | return err; |
1288 | } | |
1289 | ||
54dc79fe | 1290 | static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb) |
0bbaf069 | 1291 | { |
54dc79fe | 1292 | struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN); |
6c31d55f KG |
1293 | |
1294 | memset(fcb, 0, GMAC_FCB_LEN); | |
0bbaf069 | 1295 | |
0bbaf069 KG |
1296 | return fcb; |
1297 | } | |
1298 | ||
1299 | static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb) | |
1300 | { | |
7f7f5316 | 1301 | u8 flags = 0; |
0bbaf069 KG |
1302 | |
1303 | /* If we're here, it's a IP packet with a TCP or UDP | |
1304 | * payload. We set it to checksum, using a pseudo-header | |
1305 | * we provide | |
1306 | */ | |
7f7f5316 | 1307 | flags = TXFCB_DEFAULT; |
0bbaf069 | 1308 | |
7f7f5316 AF |
1309 | /* Tell the controller what the protocol is */ |
1310 | /* And provide the already calculated phcs */ | |
eddc9ec5 | 1311 | if (ip_hdr(skb)->protocol == IPPROTO_UDP) { |
7f7f5316 | 1312 | flags |= TXFCB_UDP; |
4bedb452 | 1313 | fcb->phcs = udp_hdr(skb)->check; |
7f7f5316 | 1314 | } else |
8da32de5 | 1315 | fcb->phcs = tcp_hdr(skb)->check; |
0bbaf069 KG |
1316 | |
1317 | /* l3os is the distance between the start of the | |
1318 | * frame (skb->data) and the start of the IP hdr. | |
1319 | * l4os is the distance between the start of the | |
1320 | * l3 hdr and the l4 hdr */ | |
bbe735e4 | 1321 | fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN); |
cfe1fc77 | 1322 | fcb->l4os = skb_network_header_len(skb); |
0bbaf069 | 1323 | |
7f7f5316 | 1324 | fcb->flags = flags; |
0bbaf069 KG |
1325 | } |
1326 | ||
7f7f5316 | 1327 | void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb) |
0bbaf069 | 1328 | { |
7f7f5316 | 1329 | fcb->flags |= TXFCB_VLN; |
0bbaf069 KG |
1330 | fcb->vlctl = vlan_tx_tag_get(skb); |
1331 | } | |
1332 | ||
4669bc90 DH |
1333 | static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride, |
1334 | struct txbd8 *base, int ring_size) | |
1335 | { | |
1336 | struct txbd8 *new_bd = bdp + stride; | |
1337 | ||
1338 | return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd; | |
1339 | } | |
1340 | ||
1341 | static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base, | |
1342 | int ring_size) | |
1343 | { | |
1344 | return skip_txbd(bdp, 1, base, ring_size); | |
1345 | } | |
1346 | ||
1da177e4 LT |
1347 | /* This is called by the kernel when a frame is ready for transmission. */ |
1348 | /* It is pointed to by the dev->hard_start_xmit function pointer */ | |
1349 | static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1350 | { | |
1351 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 | 1352 | struct txfcb *fcb = NULL; |
4669bc90 | 1353 | struct txbd8 *txbdp, *txbdp_start, *base; |
5a5efed4 | 1354 | u32 lstatus; |
4669bc90 DH |
1355 | int i; |
1356 | u32 bufaddr; | |
fef6108d | 1357 | unsigned long flags; |
4669bc90 DH |
1358 | unsigned int nr_frags, length; |
1359 | ||
1360 | base = priv->tx_bd_base; | |
1361 | ||
5b28beaf LY |
1362 | /* make space for additional header when fcb is needed */ |
1363 | if (((skb->ip_summed == CHECKSUM_PARTIAL) || | |
1364 | (priv->vlgrp && vlan_tx_tag_present(skb))) && | |
1365 | (skb_headroom(skb) < GMAC_FCB_LEN)) { | |
54dc79fe SH |
1366 | struct sk_buff *skb_new; |
1367 | ||
1368 | skb_new = skb_realloc_headroom(skb, GMAC_FCB_LEN); | |
1369 | if (!skb_new) { | |
1370 | dev->stats.tx_errors++; | |
bd14ba84 | 1371 | kfree_skb(skb); |
54dc79fe SH |
1372 | return NETDEV_TX_OK; |
1373 | } | |
1374 | kfree_skb(skb); | |
1375 | skb = skb_new; | |
1376 | } | |
1377 | ||
4669bc90 DH |
1378 | /* total number of fragments in the SKB */ |
1379 | nr_frags = skb_shinfo(skb)->nr_frags; | |
1380 | ||
1381 | spin_lock_irqsave(&priv->txlock, flags); | |
1382 | ||
1383 | /* check if there is space to queue this packet */ | |
7958a453 | 1384 | if ((nr_frags+1) > priv->num_txbdfree) { |
4669bc90 DH |
1385 | /* no space, stop the queue */ |
1386 | netif_stop_queue(dev); | |
1387 | dev->stats.tx_fifo_errors++; | |
1388 | spin_unlock_irqrestore(&priv->txlock, flags); | |
1389 | return NETDEV_TX_BUSY; | |
1390 | } | |
1da177e4 LT |
1391 | |
1392 | /* Update transmit stats */ | |
09f75cd7 | 1393 | dev->stats.tx_bytes += skb->len; |
1da177e4 | 1394 | |
4669bc90 | 1395 | txbdp = txbdp_start = priv->cur_tx; |
1da177e4 | 1396 | |
4669bc90 DH |
1397 | if (nr_frags == 0) { |
1398 | lstatus = txbdp->lstatus | BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); | |
1399 | } else { | |
1400 | /* Place the fragment addresses and lengths into the TxBDs */ | |
1401 | for (i = 0; i < nr_frags; i++) { | |
1402 | /* Point at the next BD, wrapping as needed */ | |
1403 | txbdp = next_txbd(txbdp, base, priv->tx_ring_size); | |
1404 | ||
1405 | length = skb_shinfo(skb)->frags[i].size; | |
1406 | ||
1407 | lstatus = txbdp->lstatus | length | | |
1408 | BD_LFLAG(TXBD_READY); | |
1409 | ||
1410 | /* Handle the last BD specially */ | |
1411 | if (i == nr_frags - 1) | |
1412 | lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); | |
1da177e4 | 1413 | |
4826857f | 1414 | bufaddr = dma_map_page(&priv->ofdev->dev, |
4669bc90 DH |
1415 | skb_shinfo(skb)->frags[i].page, |
1416 | skb_shinfo(skb)->frags[i].page_offset, | |
1417 | length, | |
1418 | DMA_TO_DEVICE); | |
1419 | ||
1420 | /* set the TxBD length and buffer pointer */ | |
1421 | txbdp->bufPtr = bufaddr; | |
1422 | txbdp->lstatus = lstatus; | |
1423 | } | |
1424 | ||
1425 | lstatus = txbdp_start->lstatus; | |
1426 | } | |
1da177e4 | 1427 | |
0bbaf069 | 1428 | /* Set up checksumming */ |
12dea57b | 1429 | if (CHECKSUM_PARTIAL == skb->ip_summed) { |
54dc79fe SH |
1430 | fcb = gfar_add_fcb(skb); |
1431 | lstatus |= BD_LFLAG(TXBD_TOE); | |
1432 | gfar_tx_checksum(skb, fcb); | |
0bbaf069 KG |
1433 | } |
1434 | ||
77ecaf2d | 1435 | if (priv->vlgrp && vlan_tx_tag_present(skb)) { |
54dc79fe SH |
1436 | if (unlikely(NULL == fcb)) { |
1437 | fcb = gfar_add_fcb(skb); | |
5a5efed4 | 1438 | lstatus |= BD_LFLAG(TXBD_TOE); |
7f7f5316 | 1439 | } |
54dc79fe SH |
1440 | |
1441 | gfar_tx_vlan(skb, fcb); | |
0bbaf069 KG |
1442 | } |
1443 | ||
4669bc90 | 1444 | /* setup the TxBD length and buffer pointer for the first BD */ |
1da177e4 | 1445 | priv->tx_skbuff[priv->skb_curtx] = skb; |
4826857f | 1446 | txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data, |
4669bc90 | 1447 | skb_headlen(skb), DMA_TO_DEVICE); |
1da177e4 | 1448 | |
4669bc90 | 1449 | lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb); |
1da177e4 | 1450 | |
4669bc90 DH |
1451 | /* |
1452 | * The powerpc-specific eieio() is used, as wmb() has too strong | |
3b6330ce SW |
1453 | * semantics (it requires synchronization between cacheable and |
1454 | * uncacheable mappings, which eieio doesn't provide and which we | |
1455 | * don't need), thus requiring a more expensive sync instruction. At | |
1456 | * some point, the set of architecture-independent barrier functions | |
1457 | * should be expanded to include weaker barriers. | |
1458 | */ | |
3b6330ce | 1459 | eieio(); |
7f7f5316 | 1460 | |
4669bc90 DH |
1461 | txbdp_start->lstatus = lstatus; |
1462 | ||
1463 | /* Update the current skb pointer to the next entry we will use | |
1464 | * (wrapping if necessary) */ | |
1465 | priv->skb_curtx = (priv->skb_curtx + 1) & | |
1466 | TX_RING_MOD_MASK(priv->tx_ring_size); | |
1467 | ||
1468 | priv->cur_tx = next_txbd(txbdp, base, priv->tx_ring_size); | |
1469 | ||
1470 | /* reduce TxBD free count */ | |
1471 | priv->num_txbdfree -= (nr_frags + 1); | |
1472 | ||
1473 | dev->trans_start = jiffies; | |
1da177e4 LT |
1474 | |
1475 | /* If the next BD still needs to be cleaned up, then the bds | |
1476 | are full. We need to tell the kernel to stop sending us stuff. */ | |
4669bc90 | 1477 | if (!priv->num_txbdfree) { |
1da177e4 LT |
1478 | netif_stop_queue(dev); |
1479 | ||
09f75cd7 | 1480 | dev->stats.tx_fifo_errors++; |
1da177e4 LT |
1481 | } |
1482 | ||
1da177e4 LT |
1483 | /* Tell the DMA to go go go */ |
1484 | gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); | |
1485 | ||
1486 | /* Unlock priv */ | |
fef6108d | 1487 | spin_unlock_irqrestore(&priv->txlock, flags); |
1da177e4 | 1488 | |
54dc79fe | 1489 | return NETDEV_TX_OK; |
1da177e4 LT |
1490 | } |
1491 | ||
1492 | /* Stops the kernel queue, and halts the controller */ | |
1493 | static int gfar_close(struct net_device *dev) | |
1494 | { | |
1495 | struct gfar_private *priv = netdev_priv(dev); | |
bea3348e SH |
1496 | |
1497 | napi_disable(&priv->napi); | |
1498 | ||
0fd56bb5 | 1499 | skb_queue_purge(&priv->rx_recycle); |
ab939905 | 1500 | cancel_work_sync(&priv->reset_task); |
1da177e4 LT |
1501 | stop_gfar(dev); |
1502 | ||
bb40dcbb AF |
1503 | /* Disconnect from the PHY */ |
1504 | phy_disconnect(priv->phydev); | |
1505 | priv->phydev = NULL; | |
1da177e4 LT |
1506 | |
1507 | netif_stop_queue(dev); | |
1508 | ||
1509 | return 0; | |
1510 | } | |
1511 | ||
1da177e4 | 1512 | /* Changes the mac address if the controller is not running. */ |
f162b9d5 | 1513 | static int gfar_set_mac_address(struct net_device *dev) |
1da177e4 | 1514 | { |
7f7f5316 | 1515 | gfar_set_mac_for_addr(dev, 0, dev->dev_addr); |
1da177e4 LT |
1516 | |
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | ||
0bbaf069 KG |
1521 | /* Enables and disables VLAN insertion/extraction */ |
1522 | static void gfar_vlan_rx_register(struct net_device *dev, | |
1523 | struct vlan_group *grp) | |
1524 | { | |
1525 | struct gfar_private *priv = netdev_priv(dev); | |
1526 | unsigned long flags; | |
1527 | u32 tempval; | |
1528 | ||
fef6108d | 1529 | spin_lock_irqsave(&priv->rxlock, flags); |
0bbaf069 | 1530 | |
cd1f55a5 | 1531 | priv->vlgrp = grp; |
0bbaf069 KG |
1532 | |
1533 | if (grp) { | |
1534 | /* Enable VLAN tag insertion */ | |
1535 | tempval = gfar_read(&priv->regs->tctrl); | |
1536 | tempval |= TCTRL_VLINS; | |
1537 | ||
1538 | gfar_write(&priv->regs->tctrl, tempval); | |
6aa20a22 | 1539 | |
0bbaf069 KG |
1540 | /* Enable VLAN tag extraction */ |
1541 | tempval = gfar_read(&priv->regs->rctrl); | |
77ecaf2d | 1542 | tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT); |
0bbaf069 KG |
1543 | gfar_write(&priv->regs->rctrl, tempval); |
1544 | } else { | |
1545 | /* Disable VLAN tag insertion */ | |
1546 | tempval = gfar_read(&priv->regs->tctrl); | |
1547 | tempval &= ~TCTRL_VLINS; | |
1548 | gfar_write(&priv->regs->tctrl, tempval); | |
1549 | ||
1550 | /* Disable VLAN tag extraction */ | |
1551 | tempval = gfar_read(&priv->regs->rctrl); | |
1552 | tempval &= ~RCTRL_VLEX; | |
77ecaf2d DH |
1553 | /* If parse is no longer required, then disable parser */ |
1554 | if (tempval & RCTRL_REQ_PARSER) | |
1555 | tempval |= RCTRL_PRSDEP_INIT; | |
1556 | else | |
1557 | tempval &= ~RCTRL_PRSDEP_INIT; | |
0bbaf069 KG |
1558 | gfar_write(&priv->regs->rctrl, tempval); |
1559 | } | |
1560 | ||
77ecaf2d DH |
1561 | gfar_change_mtu(dev, dev->mtu); |
1562 | ||
fef6108d | 1563 | spin_unlock_irqrestore(&priv->rxlock, flags); |
0bbaf069 KG |
1564 | } |
1565 | ||
1da177e4 LT |
1566 | static int gfar_change_mtu(struct net_device *dev, int new_mtu) |
1567 | { | |
1568 | int tempsize, tempval; | |
1569 | struct gfar_private *priv = netdev_priv(dev); | |
1570 | int oldsize = priv->rx_buffer_size; | |
0bbaf069 KG |
1571 | int frame_size = new_mtu + ETH_HLEN; |
1572 | ||
77ecaf2d | 1573 | if (priv->vlgrp) |
faa89577 | 1574 | frame_size += VLAN_HLEN; |
0bbaf069 | 1575 | |
1da177e4 | 1576 | if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) { |
0bbaf069 KG |
1577 | if (netif_msg_drv(priv)) |
1578 | printk(KERN_ERR "%s: Invalid MTU setting\n", | |
1579 | dev->name); | |
1da177e4 LT |
1580 | return -EINVAL; |
1581 | } | |
1582 | ||
77ecaf2d DH |
1583 | if (gfar_uses_fcb(priv)) |
1584 | frame_size += GMAC_FCB_LEN; | |
1585 | ||
1586 | frame_size += priv->padding; | |
1587 | ||
1da177e4 LT |
1588 | tempsize = |
1589 | (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) + | |
1590 | INCREMENTAL_BUFFER_SIZE; | |
1591 | ||
1592 | /* Only stop and start the controller if it isn't already | |
7f7f5316 | 1593 | * stopped, and we changed something */ |
1da177e4 LT |
1594 | if ((oldsize != tempsize) && (dev->flags & IFF_UP)) |
1595 | stop_gfar(dev); | |
1596 | ||
1597 | priv->rx_buffer_size = tempsize; | |
1598 | ||
1599 | dev->mtu = new_mtu; | |
1600 | ||
1601 | gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); | |
1602 | gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size); | |
1603 | ||
1604 | /* If the mtu is larger than the max size for standard | |
1605 | * ethernet frames (ie, a jumbo frame), then set maccfg2 | |
1606 | * to allow huge frames, and to check the length */ | |
1607 | tempval = gfar_read(&priv->regs->maccfg2); | |
1608 | ||
1609 | if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE) | |
1610 | tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); | |
1611 | else | |
1612 | tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); | |
1613 | ||
1614 | gfar_write(&priv->regs->maccfg2, tempval); | |
1615 | ||
1616 | if ((oldsize != tempsize) && (dev->flags & IFF_UP)) | |
1617 | startup_gfar(dev); | |
1618 | ||
1619 | return 0; | |
1620 | } | |
1621 | ||
ab939905 | 1622 | /* gfar_reset_task gets scheduled when a packet has not been |
1da177e4 LT |
1623 | * transmitted after a set amount of time. |
1624 | * For now, assume that clearing out all the structures, and | |
ab939905 SS |
1625 | * starting over will fix the problem. |
1626 | */ | |
1627 | static void gfar_reset_task(struct work_struct *work) | |
1da177e4 | 1628 | { |
ab939905 SS |
1629 | struct gfar_private *priv = container_of(work, struct gfar_private, |
1630 | reset_task); | |
4826857f | 1631 | struct net_device *dev = priv->ndev; |
1da177e4 LT |
1632 | |
1633 | if (dev->flags & IFF_UP) { | |
cbea2707 | 1634 | netif_stop_queue(dev); |
1da177e4 LT |
1635 | stop_gfar(dev); |
1636 | startup_gfar(dev); | |
cbea2707 | 1637 | netif_start_queue(dev); |
1da177e4 LT |
1638 | } |
1639 | ||
263ba320 | 1640 | netif_tx_schedule_all(dev); |
1da177e4 LT |
1641 | } |
1642 | ||
ab939905 SS |
1643 | static void gfar_timeout(struct net_device *dev) |
1644 | { | |
1645 | struct gfar_private *priv = netdev_priv(dev); | |
1646 | ||
1647 | dev->stats.tx_errors++; | |
1648 | schedule_work(&priv->reset_task); | |
1649 | } | |
1650 | ||
1da177e4 | 1651 | /* Interrupt Handler for Transmit complete */ |
f162b9d5 | 1652 | static int gfar_clean_tx_ring(struct net_device *dev) |
1da177e4 | 1653 | { |
d080cd63 | 1654 | struct gfar_private *priv = netdev_priv(dev); |
4669bc90 DH |
1655 | struct txbd8 *bdp; |
1656 | struct txbd8 *lbdp = NULL; | |
1657 | struct txbd8 *base = priv->tx_bd_base; | |
1658 | struct sk_buff *skb; | |
1659 | int skb_dirtytx; | |
1660 | int tx_ring_size = priv->tx_ring_size; | |
1661 | int frags = 0; | |
1662 | int i; | |
d080cd63 | 1663 | int howmany = 0; |
4669bc90 | 1664 | u32 lstatus; |
1da177e4 | 1665 | |
1da177e4 | 1666 | bdp = priv->dirty_tx; |
4669bc90 | 1667 | skb_dirtytx = priv->skb_dirtytx; |
1da177e4 | 1668 | |
4669bc90 DH |
1669 | while ((skb = priv->tx_skbuff[skb_dirtytx])) { |
1670 | frags = skb_shinfo(skb)->nr_frags; | |
1671 | lbdp = skip_txbd(bdp, frags, base, tx_ring_size); | |
1da177e4 | 1672 | |
4669bc90 | 1673 | lstatus = lbdp->lstatus; |
1da177e4 | 1674 | |
4669bc90 DH |
1675 | /* Only clean completed frames */ |
1676 | if ((lstatus & BD_LFLAG(TXBD_READY)) && | |
1677 | (lstatus & BD_LENGTH_MASK)) | |
1678 | break; | |
1679 | ||
4826857f | 1680 | dma_unmap_single(&priv->ofdev->dev, |
4669bc90 DH |
1681 | bdp->bufPtr, |
1682 | bdp->length, | |
1683 | DMA_TO_DEVICE); | |
81183059 | 1684 | |
4669bc90 DH |
1685 | bdp->lstatus &= BD_LFLAG(TXBD_WRAP); |
1686 | bdp = next_txbd(bdp, base, tx_ring_size); | |
d080cd63 | 1687 | |
4669bc90 | 1688 | for (i = 0; i < frags; i++) { |
4826857f | 1689 | dma_unmap_page(&priv->ofdev->dev, |
4669bc90 DH |
1690 | bdp->bufPtr, |
1691 | bdp->length, | |
1692 | DMA_TO_DEVICE); | |
1693 | bdp->lstatus &= BD_LFLAG(TXBD_WRAP); | |
1694 | bdp = next_txbd(bdp, base, tx_ring_size); | |
1695 | } | |
1da177e4 | 1696 | |
0fd56bb5 AF |
1697 | /* |
1698 | * If there's room in the queue (limit it to rx_buffer_size) | |
1699 | * we add this skb back into the pool, if it's the right size | |
1700 | */ | |
1701 | if (skb_queue_len(&priv->rx_recycle) < priv->rx_ring_size && | |
1702 | skb_recycle_check(skb, priv->rx_buffer_size + | |
1703 | RXBUF_ALIGNMENT)) | |
1704 | __skb_queue_head(&priv->rx_recycle, skb); | |
1705 | else | |
1706 | dev_kfree_skb_any(skb); | |
1707 | ||
4669bc90 | 1708 | priv->tx_skbuff[skb_dirtytx] = NULL; |
d080cd63 | 1709 | |
4669bc90 DH |
1710 | skb_dirtytx = (skb_dirtytx + 1) & |
1711 | TX_RING_MOD_MASK(tx_ring_size); | |
1712 | ||
1713 | howmany++; | |
1714 | priv->num_txbdfree += frags + 1; | |
1715 | } | |
1da177e4 | 1716 | |
4669bc90 DH |
1717 | /* If we freed a buffer, we can restart transmission, if necessary */ |
1718 | if (netif_queue_stopped(dev) && priv->num_txbdfree) | |
1719 | netif_wake_queue(dev); | |
1da177e4 | 1720 | |
4669bc90 DH |
1721 | /* Update dirty indicators */ |
1722 | priv->skb_dirtytx = skb_dirtytx; | |
1723 | priv->dirty_tx = bdp; | |
1da177e4 | 1724 | |
d080cd63 DH |
1725 | dev->stats.tx_packets += howmany; |
1726 | ||
1727 | return howmany; | |
1728 | } | |
1729 | ||
8c7396ae | 1730 | static void gfar_schedule_cleanup(struct net_device *dev) |
d080cd63 | 1731 | { |
d080cd63 | 1732 | struct gfar_private *priv = netdev_priv(dev); |
a6d0b91a AV |
1733 | unsigned long flags; |
1734 | ||
1735 | spin_lock_irqsave(&priv->txlock, flags); | |
1736 | spin_lock(&priv->rxlock); | |
1737 | ||
288379f0 | 1738 | if (napi_schedule_prep(&priv->napi)) { |
8c7396ae | 1739 | gfar_write(&priv->regs->imask, IMASK_RTX_DISABLED); |
288379f0 | 1740 | __napi_schedule(&priv->napi); |
8707bdd4 JP |
1741 | } else { |
1742 | /* | |
1743 | * Clear IEVENT, so interrupts aren't called again | |
1744 | * because of the packets that have already arrived. | |
1745 | */ | |
1746 | gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK); | |
2f448911 | 1747 | } |
a6d0b91a AV |
1748 | |
1749 | spin_unlock(&priv->rxlock); | |
1750 | spin_unlock_irqrestore(&priv->txlock, flags); | |
8c7396ae | 1751 | } |
1da177e4 | 1752 | |
8c7396ae DH |
1753 | /* Interrupt Handler for Transmit complete */ |
1754 | static irqreturn_t gfar_transmit(int irq, void *dev_id) | |
1755 | { | |
1756 | gfar_schedule_cleanup((struct net_device *)dev_id); | |
1da177e4 LT |
1757 | return IRQ_HANDLED; |
1758 | } | |
1759 | ||
815b97c6 AF |
1760 | static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp, |
1761 | struct sk_buff *skb) | |
1762 | { | |
1763 | struct gfar_private *priv = netdev_priv(dev); | |
8a102fe0 | 1764 | dma_addr_t buf; |
815b97c6 | 1765 | |
8a102fe0 AV |
1766 | buf = dma_map_single(&priv->ofdev->dev, skb->data, |
1767 | priv->rx_buffer_size, DMA_FROM_DEVICE); | |
1768 | gfar_init_rxbdp(dev, bdp, buf); | |
815b97c6 AF |
1769 | } |
1770 | ||
1771 | ||
1772 | struct sk_buff * gfar_new_skb(struct net_device *dev) | |
1da177e4 | 1773 | { |
7f7f5316 | 1774 | unsigned int alignamount; |
1da177e4 LT |
1775 | struct gfar_private *priv = netdev_priv(dev); |
1776 | struct sk_buff *skb = NULL; | |
1da177e4 | 1777 | |
0fd56bb5 AF |
1778 | skb = __skb_dequeue(&priv->rx_recycle); |
1779 | if (!skb) | |
1780 | skb = netdev_alloc_skb(dev, | |
1781 | priv->rx_buffer_size + RXBUF_ALIGNMENT); | |
1da177e4 | 1782 | |
815b97c6 | 1783 | if (!skb) |
1da177e4 LT |
1784 | return NULL; |
1785 | ||
7f7f5316 | 1786 | alignamount = RXBUF_ALIGNMENT - |
bea3348e | 1787 | (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)); |
7f7f5316 | 1788 | |
1da177e4 LT |
1789 | /* We need the data buffer to be aligned properly. We will reserve |
1790 | * as many bytes as needed to align the data properly | |
1791 | */ | |
7f7f5316 | 1792 | skb_reserve(skb, alignamount); |
1da177e4 | 1793 | |
1da177e4 LT |
1794 | return skb; |
1795 | } | |
1796 | ||
298e1a9e | 1797 | static inline void count_errors(unsigned short status, struct net_device *dev) |
1da177e4 | 1798 | { |
298e1a9e | 1799 | struct gfar_private *priv = netdev_priv(dev); |
09f75cd7 | 1800 | struct net_device_stats *stats = &dev->stats; |
1da177e4 LT |
1801 | struct gfar_extra_stats *estats = &priv->extra_stats; |
1802 | ||
1803 | /* If the packet was truncated, none of the other errors | |
1804 | * matter */ | |
1805 | if (status & RXBD_TRUNCATED) { | |
1806 | stats->rx_length_errors++; | |
1807 | ||
1808 | estats->rx_trunc++; | |
1809 | ||
1810 | return; | |
1811 | } | |
1812 | /* Count the errors, if there were any */ | |
1813 | if (status & (RXBD_LARGE | RXBD_SHORT)) { | |
1814 | stats->rx_length_errors++; | |
1815 | ||
1816 | if (status & RXBD_LARGE) | |
1817 | estats->rx_large++; | |
1818 | else | |
1819 | estats->rx_short++; | |
1820 | } | |
1821 | if (status & RXBD_NONOCTET) { | |
1822 | stats->rx_frame_errors++; | |
1823 | estats->rx_nonoctet++; | |
1824 | } | |
1825 | if (status & RXBD_CRCERR) { | |
1826 | estats->rx_crcerr++; | |
1827 | stats->rx_crc_errors++; | |
1828 | } | |
1829 | if (status & RXBD_OVERRUN) { | |
1830 | estats->rx_overrun++; | |
1831 | stats->rx_crc_errors++; | |
1832 | } | |
1833 | } | |
1834 | ||
7d12e780 | 1835 | irqreturn_t gfar_receive(int irq, void *dev_id) |
1da177e4 | 1836 | { |
8c7396ae | 1837 | gfar_schedule_cleanup((struct net_device *)dev_id); |
1da177e4 LT |
1838 | return IRQ_HANDLED; |
1839 | } | |
1840 | ||
0bbaf069 KG |
1841 | static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb) |
1842 | { | |
1843 | /* If valid headers were found, and valid sums | |
1844 | * were verified, then we tell the kernel that no | |
1845 | * checksumming is necessary. Otherwise, it is */ | |
7f7f5316 | 1846 | if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU)) |
0bbaf069 KG |
1847 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1848 | else | |
1849 | skb->ip_summed = CHECKSUM_NONE; | |
1850 | } | |
1851 | ||
1852 | ||
1da177e4 LT |
1853 | /* gfar_process_frame() -- handle one incoming packet if skb |
1854 | * isn't NULL. */ | |
1855 | static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, | |
2c2db48a | 1856 | int amount_pull) |
1da177e4 LT |
1857 | { |
1858 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 | 1859 | struct rxfcb *fcb = NULL; |
1da177e4 | 1860 | |
2c2db48a | 1861 | int ret; |
1da177e4 | 1862 | |
2c2db48a DH |
1863 | /* fcb is at the beginning if exists */ |
1864 | fcb = (struct rxfcb *)skb->data; | |
0bbaf069 | 1865 | |
2c2db48a DH |
1866 | /* Remove the FCB from the skb */ |
1867 | /* Remove the padded bytes, if there are any */ | |
1868 | if (amount_pull) | |
1869 | skb_pull(skb, amount_pull); | |
0bbaf069 | 1870 | |
2c2db48a DH |
1871 | if (priv->rx_csum_enable) |
1872 | gfar_rx_checksum(skb, fcb); | |
0bbaf069 | 1873 | |
2c2db48a DH |
1874 | /* Tell the skb what kind of packet this is */ |
1875 | skb->protocol = eth_type_trans(skb, dev); | |
1da177e4 | 1876 | |
2c2db48a DH |
1877 | /* Send the packet up the stack */ |
1878 | if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN))) | |
1879 | ret = vlan_hwaccel_receive_skb(skb, priv->vlgrp, fcb->vlctl); | |
1880 | else | |
1881 | ret = netif_receive_skb(skb); | |
0bbaf069 | 1882 | |
2c2db48a DH |
1883 | if (NET_RX_DROP == ret) |
1884 | priv->extra_stats.kernel_dropped++; | |
1da177e4 LT |
1885 | |
1886 | return 0; | |
1887 | } | |
1888 | ||
1889 | /* gfar_clean_rx_ring() -- Processes each frame in the rx ring | |
0bbaf069 | 1890 | * until the budget/quota has been reached. Returns the number |
1da177e4 LT |
1891 | * of frames handled |
1892 | */ | |
0bbaf069 | 1893 | int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit) |
1da177e4 | 1894 | { |
31de198b | 1895 | struct rxbd8 *bdp, *base; |
1da177e4 | 1896 | struct sk_buff *skb; |
2c2db48a DH |
1897 | int pkt_len; |
1898 | int amount_pull; | |
1da177e4 LT |
1899 | int howmany = 0; |
1900 | struct gfar_private *priv = netdev_priv(dev); | |
1901 | ||
1902 | /* Get the first full descriptor */ | |
1903 | bdp = priv->cur_rx; | |
31de198b | 1904 | base = priv->rx_bd_base; |
1da177e4 | 1905 | |
2c2db48a DH |
1906 | amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0) + |
1907 | priv->padding; | |
1908 | ||
1da177e4 | 1909 | while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) { |
815b97c6 | 1910 | struct sk_buff *newskb; |
3b6330ce | 1911 | rmb(); |
815b97c6 AF |
1912 | |
1913 | /* Add another skb for the future */ | |
1914 | newskb = gfar_new_skb(dev); | |
1915 | ||
1da177e4 LT |
1916 | skb = priv->rx_skbuff[priv->skb_currx]; |
1917 | ||
4826857f | 1918 | dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr, |
81183059 AF |
1919 | priv->rx_buffer_size, DMA_FROM_DEVICE); |
1920 | ||
815b97c6 AF |
1921 | /* We drop the frame if we failed to allocate a new buffer */ |
1922 | if (unlikely(!newskb || !(bdp->status & RXBD_LAST) || | |
1923 | bdp->status & RXBD_ERR)) { | |
1924 | count_errors(bdp->status, dev); | |
1925 | ||
1926 | if (unlikely(!newskb)) | |
1927 | newskb = skb; | |
4e2fd555 LB |
1928 | else if (skb) { |
1929 | /* | |
1930 | * We need to reset ->data to what it | |
1931 | * was before gfar_new_skb() re-aligned | |
1932 | * it to an RXBUF_ALIGNMENT boundary | |
1933 | * before we put the skb back on the | |
1934 | * recycle list. | |
1935 | */ | |
1936 | skb->data = skb->head + NET_SKB_PAD; | |
0fd56bb5 | 1937 | __skb_queue_head(&priv->rx_recycle, skb); |
4e2fd555 | 1938 | } |
815b97c6 | 1939 | } else { |
1da177e4 | 1940 | /* Increment the number of packets */ |
09f75cd7 | 1941 | dev->stats.rx_packets++; |
1da177e4 LT |
1942 | howmany++; |
1943 | ||
2c2db48a DH |
1944 | if (likely(skb)) { |
1945 | pkt_len = bdp->length - ETH_FCS_LEN; | |
1946 | /* Remove the FCS from the packet length */ | |
1947 | skb_put(skb, pkt_len); | |
1948 | dev->stats.rx_bytes += pkt_len; | |
1da177e4 | 1949 | |
1577ecef AF |
1950 | if (in_irq() || irqs_disabled()) |
1951 | printk("Interrupt problem!\n"); | |
2c2db48a DH |
1952 | gfar_process_frame(dev, skb, amount_pull); |
1953 | ||
1954 | } else { | |
1955 | if (netif_msg_rx_err(priv)) | |
1956 | printk(KERN_WARNING | |
1957 | "%s: Missing skb!\n", dev->name); | |
1958 | dev->stats.rx_dropped++; | |
1959 | priv->extra_stats.rx_skbmissing++; | |
1960 | } | |
1da177e4 | 1961 | |
1da177e4 LT |
1962 | } |
1963 | ||
815b97c6 | 1964 | priv->rx_skbuff[priv->skb_currx] = newskb; |
1da177e4 | 1965 | |
815b97c6 AF |
1966 | /* Setup the new bdp */ |
1967 | gfar_new_rxbdp(dev, bdp, newskb); | |
1da177e4 LT |
1968 | |
1969 | /* Update to the next pointer */ | |
31de198b | 1970 | bdp = next_bd(bdp, base, priv->rx_ring_size); |
1da177e4 LT |
1971 | |
1972 | /* update to point at the next skb */ | |
1973 | priv->skb_currx = | |
815b97c6 AF |
1974 | (priv->skb_currx + 1) & |
1975 | RX_RING_MOD_MASK(priv->rx_ring_size); | |
1da177e4 LT |
1976 | } |
1977 | ||
1978 | /* Update the current rxbd pointer to be the next one */ | |
1979 | priv->cur_rx = bdp; | |
1980 | ||
1da177e4 LT |
1981 | return howmany; |
1982 | } | |
1983 | ||
bea3348e | 1984 | static int gfar_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1985 | { |
bea3348e | 1986 | struct gfar_private *priv = container_of(napi, struct gfar_private, napi); |
4826857f | 1987 | struct net_device *dev = priv->ndev; |
42199884 AF |
1988 | int tx_cleaned = 0; |
1989 | int rx_cleaned = 0; | |
d080cd63 DH |
1990 | unsigned long flags; |
1991 | ||
8c7396ae DH |
1992 | /* Clear IEVENT, so interrupts aren't called again |
1993 | * because of the packets that have already arrived */ | |
1994 | gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK); | |
1995 | ||
d080cd63 DH |
1996 | /* If we fail to get the lock, don't bother with the TX BDs */ |
1997 | if (spin_trylock_irqsave(&priv->txlock, flags)) { | |
42199884 | 1998 | tx_cleaned = gfar_clean_tx_ring(dev); |
d080cd63 DH |
1999 | spin_unlock_irqrestore(&priv->txlock, flags); |
2000 | } | |
1da177e4 | 2001 | |
42199884 | 2002 | rx_cleaned = gfar_clean_rx_ring(dev, budget); |
1da177e4 | 2003 | |
42199884 AF |
2004 | if (tx_cleaned) |
2005 | return budget; | |
2006 | ||
2007 | if (rx_cleaned < budget) { | |
288379f0 | 2008 | napi_complete(napi); |
1da177e4 LT |
2009 | |
2010 | /* Clear the halt bit in RSTAT */ | |
2011 | gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT); | |
2012 | ||
2013 | gfar_write(&priv->regs->imask, IMASK_DEFAULT); | |
2014 | ||
2015 | /* If we are coalescing interrupts, update the timer */ | |
2016 | /* Otherwise, clear it */ | |
2f448911 AF |
2017 | if (likely(priv->rxcoalescing)) { |
2018 | gfar_write(&priv->regs->rxic, 0); | |
b46a8454 | 2019 | gfar_write(&priv->regs->rxic, priv->rxic); |
2f448911 | 2020 | } |
8c7396ae DH |
2021 | if (likely(priv->txcoalescing)) { |
2022 | gfar_write(&priv->regs->txic, 0); | |
2023 | gfar_write(&priv->regs->txic, priv->txic); | |
2024 | } | |
1da177e4 LT |
2025 | } |
2026 | ||
42199884 | 2027 | return rx_cleaned; |
1da177e4 | 2028 | } |
1da177e4 | 2029 | |
f2d71c2d VW |
2030 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2031 | /* | |
2032 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
2033 | * without having to re-enable interrupts. It's not called while | |
2034 | * the interrupt routine is executing. | |
2035 | */ | |
2036 | static void gfar_netpoll(struct net_device *dev) | |
2037 | { | |
2038 | struct gfar_private *priv = netdev_priv(dev); | |
2039 | ||
2040 | /* If the device has multiple interrupts, run tx/rx */ | |
b31a1d8b | 2041 | if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { |
f2d71c2d VW |
2042 | disable_irq(priv->interruptTransmit); |
2043 | disable_irq(priv->interruptReceive); | |
2044 | disable_irq(priv->interruptError); | |
2045 | gfar_interrupt(priv->interruptTransmit, dev); | |
2046 | enable_irq(priv->interruptError); | |
2047 | enable_irq(priv->interruptReceive); | |
2048 | enable_irq(priv->interruptTransmit); | |
2049 | } else { | |
2050 | disable_irq(priv->interruptTransmit); | |
2051 | gfar_interrupt(priv->interruptTransmit, dev); | |
2052 | enable_irq(priv->interruptTransmit); | |
2053 | } | |
2054 | } | |
2055 | #endif | |
2056 | ||
1da177e4 | 2057 | /* The interrupt handler for devices with one interrupt */ |
7d12e780 | 2058 | static irqreturn_t gfar_interrupt(int irq, void *dev_id) |
1da177e4 LT |
2059 | { |
2060 | struct net_device *dev = dev_id; | |
2061 | struct gfar_private *priv = netdev_priv(dev); | |
2062 | ||
2063 | /* Save ievent for future reference */ | |
2064 | u32 events = gfar_read(&priv->regs->ievent); | |
2065 | ||
1da177e4 | 2066 | /* Check for reception */ |
538cc7ee | 2067 | if (events & IEVENT_RX_MASK) |
7d12e780 | 2068 | gfar_receive(irq, dev_id); |
1da177e4 LT |
2069 | |
2070 | /* Check for transmit completion */ | |
538cc7ee | 2071 | if (events & IEVENT_TX_MASK) |
7d12e780 | 2072 | gfar_transmit(irq, dev_id); |
1da177e4 | 2073 | |
538cc7ee SS |
2074 | /* Check for errors */ |
2075 | if (events & IEVENT_ERR_MASK) | |
2076 | gfar_error(irq, dev_id); | |
1da177e4 LT |
2077 | |
2078 | return IRQ_HANDLED; | |
2079 | } | |
2080 | ||
1da177e4 LT |
2081 | /* Called every time the controller might need to be made |
2082 | * aware of new link state. The PHY code conveys this | |
bb40dcbb | 2083 | * information through variables in the phydev structure, and this |
1da177e4 LT |
2084 | * function converts those variables into the appropriate |
2085 | * register values, and can bring down the device if needed. | |
2086 | */ | |
2087 | static void adjust_link(struct net_device *dev) | |
2088 | { | |
2089 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 2090 | struct gfar __iomem *regs = priv->regs; |
bb40dcbb AF |
2091 | unsigned long flags; |
2092 | struct phy_device *phydev = priv->phydev; | |
2093 | int new_state = 0; | |
2094 | ||
fef6108d | 2095 | spin_lock_irqsave(&priv->txlock, flags); |
bb40dcbb AF |
2096 | if (phydev->link) { |
2097 | u32 tempval = gfar_read(®s->maccfg2); | |
7f7f5316 | 2098 | u32 ecntrl = gfar_read(®s->ecntrl); |
1da177e4 | 2099 | |
1da177e4 LT |
2100 | /* Now we make sure that we can be in full duplex mode. |
2101 | * If not, we operate in half-duplex mode. */ | |
bb40dcbb AF |
2102 | if (phydev->duplex != priv->oldduplex) { |
2103 | new_state = 1; | |
2104 | if (!(phydev->duplex)) | |
1da177e4 | 2105 | tempval &= ~(MACCFG2_FULL_DUPLEX); |
bb40dcbb | 2106 | else |
1da177e4 | 2107 | tempval |= MACCFG2_FULL_DUPLEX; |
1da177e4 | 2108 | |
bb40dcbb | 2109 | priv->oldduplex = phydev->duplex; |
1da177e4 LT |
2110 | } |
2111 | ||
bb40dcbb AF |
2112 | if (phydev->speed != priv->oldspeed) { |
2113 | new_state = 1; | |
2114 | switch (phydev->speed) { | |
1da177e4 | 2115 | case 1000: |
1da177e4 LT |
2116 | tempval = |
2117 | ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII); | |
f430e49e LY |
2118 | |
2119 | ecntrl &= ~(ECNTRL_R100); | |
1da177e4 LT |
2120 | break; |
2121 | case 100: | |
2122 | case 10: | |
1da177e4 LT |
2123 | tempval = |
2124 | ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII); | |
7f7f5316 AF |
2125 | |
2126 | /* Reduced mode distinguishes | |
2127 | * between 10 and 100 */ | |
2128 | if (phydev->speed == SPEED_100) | |
2129 | ecntrl |= ECNTRL_R100; | |
2130 | else | |
2131 | ecntrl &= ~(ECNTRL_R100); | |
1da177e4 LT |
2132 | break; |
2133 | default: | |
0bbaf069 KG |
2134 | if (netif_msg_link(priv)) |
2135 | printk(KERN_WARNING | |
bb40dcbb AF |
2136 | "%s: Ack! Speed (%d) is not 10/100/1000!\n", |
2137 | dev->name, phydev->speed); | |
1da177e4 LT |
2138 | break; |
2139 | } | |
2140 | ||
bb40dcbb | 2141 | priv->oldspeed = phydev->speed; |
1da177e4 LT |
2142 | } |
2143 | ||
bb40dcbb | 2144 | gfar_write(®s->maccfg2, tempval); |
7f7f5316 | 2145 | gfar_write(®s->ecntrl, ecntrl); |
bb40dcbb | 2146 | |
1da177e4 | 2147 | if (!priv->oldlink) { |
bb40dcbb | 2148 | new_state = 1; |
1da177e4 | 2149 | priv->oldlink = 1; |
1da177e4 | 2150 | } |
bb40dcbb AF |
2151 | } else if (priv->oldlink) { |
2152 | new_state = 1; | |
2153 | priv->oldlink = 0; | |
2154 | priv->oldspeed = 0; | |
2155 | priv->oldduplex = -1; | |
1da177e4 | 2156 | } |
1da177e4 | 2157 | |
bb40dcbb AF |
2158 | if (new_state && netif_msg_link(priv)) |
2159 | phy_print_status(phydev); | |
2160 | ||
fef6108d | 2161 | spin_unlock_irqrestore(&priv->txlock, flags); |
bb40dcbb | 2162 | } |
1da177e4 LT |
2163 | |
2164 | /* Update the hash table based on the current list of multicast | |
2165 | * addresses we subscribe to. Also, change the promiscuity of | |
2166 | * the device based on the flags (this function is called | |
2167 | * whenever dev->flags is changed */ | |
2168 | static void gfar_set_multi(struct net_device *dev) | |
2169 | { | |
2170 | struct dev_mc_list *mc_ptr; | |
2171 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 2172 | struct gfar __iomem *regs = priv->regs; |
1da177e4 LT |
2173 | u32 tempval; |
2174 | ||
2175 | if(dev->flags & IFF_PROMISC) { | |
1da177e4 LT |
2176 | /* Set RCTRL to PROM */ |
2177 | tempval = gfar_read(®s->rctrl); | |
2178 | tempval |= RCTRL_PROM; | |
2179 | gfar_write(®s->rctrl, tempval); | |
2180 | } else { | |
2181 | /* Set RCTRL to not PROM */ | |
2182 | tempval = gfar_read(®s->rctrl); | |
2183 | tempval &= ~(RCTRL_PROM); | |
2184 | gfar_write(®s->rctrl, tempval); | |
2185 | } | |
6aa20a22 | 2186 | |
1da177e4 LT |
2187 | if(dev->flags & IFF_ALLMULTI) { |
2188 | /* Set the hash to rx all multicast frames */ | |
0bbaf069 KG |
2189 | gfar_write(®s->igaddr0, 0xffffffff); |
2190 | gfar_write(®s->igaddr1, 0xffffffff); | |
2191 | gfar_write(®s->igaddr2, 0xffffffff); | |
2192 | gfar_write(®s->igaddr3, 0xffffffff); | |
2193 | gfar_write(®s->igaddr4, 0xffffffff); | |
2194 | gfar_write(®s->igaddr5, 0xffffffff); | |
2195 | gfar_write(®s->igaddr6, 0xffffffff); | |
2196 | gfar_write(®s->igaddr7, 0xffffffff); | |
1da177e4 LT |
2197 | gfar_write(®s->gaddr0, 0xffffffff); |
2198 | gfar_write(®s->gaddr1, 0xffffffff); | |
2199 | gfar_write(®s->gaddr2, 0xffffffff); | |
2200 | gfar_write(®s->gaddr3, 0xffffffff); | |
2201 | gfar_write(®s->gaddr4, 0xffffffff); | |
2202 | gfar_write(®s->gaddr5, 0xffffffff); | |
2203 | gfar_write(®s->gaddr6, 0xffffffff); | |
2204 | gfar_write(®s->gaddr7, 0xffffffff); | |
2205 | } else { | |
7f7f5316 AF |
2206 | int em_num; |
2207 | int idx; | |
2208 | ||
1da177e4 | 2209 | /* zero out the hash */ |
0bbaf069 KG |
2210 | gfar_write(®s->igaddr0, 0x0); |
2211 | gfar_write(®s->igaddr1, 0x0); | |
2212 | gfar_write(®s->igaddr2, 0x0); | |
2213 | gfar_write(®s->igaddr3, 0x0); | |
2214 | gfar_write(®s->igaddr4, 0x0); | |
2215 | gfar_write(®s->igaddr5, 0x0); | |
2216 | gfar_write(®s->igaddr6, 0x0); | |
2217 | gfar_write(®s->igaddr7, 0x0); | |
1da177e4 LT |
2218 | gfar_write(®s->gaddr0, 0x0); |
2219 | gfar_write(®s->gaddr1, 0x0); | |
2220 | gfar_write(®s->gaddr2, 0x0); | |
2221 | gfar_write(®s->gaddr3, 0x0); | |
2222 | gfar_write(®s->gaddr4, 0x0); | |
2223 | gfar_write(®s->gaddr5, 0x0); | |
2224 | gfar_write(®s->gaddr6, 0x0); | |
2225 | gfar_write(®s->gaddr7, 0x0); | |
2226 | ||
7f7f5316 AF |
2227 | /* If we have extended hash tables, we need to |
2228 | * clear the exact match registers to prepare for | |
2229 | * setting them */ | |
2230 | if (priv->extended_hash) { | |
2231 | em_num = GFAR_EM_NUM + 1; | |
2232 | gfar_clear_exact_match(dev); | |
2233 | idx = 1; | |
2234 | } else { | |
2235 | idx = 0; | |
2236 | em_num = 0; | |
2237 | } | |
2238 | ||
1da177e4 LT |
2239 | if(dev->mc_count == 0) |
2240 | return; | |
2241 | ||
2242 | /* Parse the list, and set the appropriate bits */ | |
2243 | for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) { | |
7f7f5316 AF |
2244 | if (idx < em_num) { |
2245 | gfar_set_mac_for_addr(dev, idx, | |
2246 | mc_ptr->dmi_addr); | |
2247 | idx++; | |
2248 | } else | |
2249 | gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr); | |
1da177e4 LT |
2250 | } |
2251 | } | |
2252 | ||
2253 | return; | |
2254 | } | |
2255 | ||
7f7f5316 AF |
2256 | |
2257 | /* Clears each of the exact match registers to zero, so they | |
2258 | * don't interfere with normal reception */ | |
2259 | static void gfar_clear_exact_match(struct net_device *dev) | |
2260 | { | |
2261 | int idx; | |
2262 | u8 zero_arr[MAC_ADDR_LEN] = {0,0,0,0,0,0}; | |
2263 | ||
2264 | for(idx = 1;idx < GFAR_EM_NUM + 1;idx++) | |
2265 | gfar_set_mac_for_addr(dev, idx, (u8 *)zero_arr); | |
2266 | } | |
2267 | ||
1da177e4 LT |
2268 | /* Set the appropriate hash bit for the given addr */ |
2269 | /* The algorithm works like so: | |
2270 | * 1) Take the Destination Address (ie the multicast address), and | |
2271 | * do a CRC on it (little endian), and reverse the bits of the | |
2272 | * result. | |
2273 | * 2) Use the 8 most significant bits as a hash into a 256-entry | |
2274 | * table. The table is controlled through 8 32-bit registers: | |
2275 | * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is | |
2276 | * gaddr7. This means that the 3 most significant bits in the | |
2277 | * hash index which gaddr register to use, and the 5 other bits | |
2278 | * indicate which bit (assuming an IBM numbering scheme, which | |
2279 | * for PowerPC (tm) is usually the case) in the register holds | |
2280 | * the entry. */ | |
2281 | static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr) | |
2282 | { | |
2283 | u32 tempval; | |
2284 | struct gfar_private *priv = netdev_priv(dev); | |
1da177e4 | 2285 | u32 result = ether_crc(MAC_ADDR_LEN, addr); |
0bbaf069 KG |
2286 | int width = priv->hash_width; |
2287 | u8 whichbit = (result >> (32 - width)) & 0x1f; | |
2288 | u8 whichreg = result >> (32 - width + 5); | |
1da177e4 LT |
2289 | u32 value = (1 << (31-whichbit)); |
2290 | ||
0bbaf069 | 2291 | tempval = gfar_read(priv->hash_regs[whichreg]); |
1da177e4 | 2292 | tempval |= value; |
0bbaf069 | 2293 | gfar_write(priv->hash_regs[whichreg], tempval); |
1da177e4 LT |
2294 | |
2295 | return; | |
2296 | } | |
2297 | ||
7f7f5316 AF |
2298 | |
2299 | /* There are multiple MAC Address register pairs on some controllers | |
2300 | * This function sets the numth pair to a given address | |
2301 | */ | |
2302 | static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr) | |
2303 | { | |
2304 | struct gfar_private *priv = netdev_priv(dev); | |
2305 | int idx; | |
2306 | char tmpbuf[MAC_ADDR_LEN]; | |
2307 | u32 tempval; | |
cc8c6e37 | 2308 | u32 __iomem *macptr = &priv->regs->macstnaddr1; |
7f7f5316 AF |
2309 | |
2310 | macptr += num*2; | |
2311 | ||
2312 | /* Now copy it into the mac registers backwards, cuz */ | |
2313 | /* little endian is silly */ | |
2314 | for (idx = 0; idx < MAC_ADDR_LEN; idx++) | |
2315 | tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx]; | |
2316 | ||
2317 | gfar_write(macptr, *((u32 *) (tmpbuf))); | |
2318 | ||
2319 | tempval = *((u32 *) (tmpbuf + 4)); | |
2320 | ||
2321 | gfar_write(macptr+1, tempval); | |
2322 | } | |
2323 | ||
1da177e4 | 2324 | /* GFAR error interrupt handler */ |
7d12e780 | 2325 | static irqreturn_t gfar_error(int irq, void *dev_id) |
1da177e4 LT |
2326 | { |
2327 | struct net_device *dev = dev_id; | |
2328 | struct gfar_private *priv = netdev_priv(dev); | |
2329 | ||
2330 | /* Save ievent for future reference */ | |
2331 | u32 events = gfar_read(&priv->regs->ievent); | |
2332 | ||
2333 | /* Clear IEVENT */ | |
d87eb127 SW |
2334 | gfar_write(&priv->regs->ievent, events & IEVENT_ERR_MASK); |
2335 | ||
2336 | /* Magic Packet is not an error. */ | |
b31a1d8b | 2337 | if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) && |
d87eb127 SW |
2338 | (events & IEVENT_MAG)) |
2339 | events &= ~IEVENT_MAG; | |
1da177e4 LT |
2340 | |
2341 | /* Hmm... */ | |
0bbaf069 KG |
2342 | if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv)) |
2343 | printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n", | |
538cc7ee | 2344 | dev->name, events, gfar_read(&priv->regs->imask)); |
1da177e4 LT |
2345 | |
2346 | /* Update the error counters */ | |
2347 | if (events & IEVENT_TXE) { | |
09f75cd7 | 2348 | dev->stats.tx_errors++; |
1da177e4 LT |
2349 | |
2350 | if (events & IEVENT_LC) | |
09f75cd7 | 2351 | dev->stats.tx_window_errors++; |
1da177e4 | 2352 | if (events & IEVENT_CRL) |
09f75cd7 | 2353 | dev->stats.tx_aborted_errors++; |
1da177e4 | 2354 | if (events & IEVENT_XFUN) { |
0bbaf069 | 2355 | if (netif_msg_tx_err(priv)) |
538cc7ee SS |
2356 | printk(KERN_DEBUG "%s: TX FIFO underrun, " |
2357 | "packet dropped.\n", dev->name); | |
09f75cd7 | 2358 | dev->stats.tx_dropped++; |
1da177e4 LT |
2359 | priv->extra_stats.tx_underrun++; |
2360 | ||
2361 | /* Reactivate the Tx Queues */ | |
2362 | gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); | |
2363 | } | |
0bbaf069 KG |
2364 | if (netif_msg_tx_err(priv)) |
2365 | printk(KERN_DEBUG "%s: Transmit Error\n", dev->name); | |
1da177e4 LT |
2366 | } |
2367 | if (events & IEVENT_BSY) { | |
09f75cd7 | 2368 | dev->stats.rx_errors++; |
1da177e4 LT |
2369 | priv->extra_stats.rx_bsy++; |
2370 | ||
7d12e780 | 2371 | gfar_receive(irq, dev_id); |
1da177e4 | 2372 | |
0bbaf069 | 2373 | if (netif_msg_rx_err(priv)) |
538cc7ee SS |
2374 | printk(KERN_DEBUG "%s: busy error (rstat: %x)\n", |
2375 | dev->name, gfar_read(&priv->regs->rstat)); | |
1da177e4 LT |
2376 | } |
2377 | if (events & IEVENT_BABR) { | |
09f75cd7 | 2378 | dev->stats.rx_errors++; |
1da177e4 LT |
2379 | priv->extra_stats.rx_babr++; |
2380 | ||
0bbaf069 | 2381 | if (netif_msg_rx_err(priv)) |
538cc7ee | 2382 | printk(KERN_DEBUG "%s: babbling RX error\n", dev->name); |
1da177e4 LT |
2383 | } |
2384 | if (events & IEVENT_EBERR) { | |
2385 | priv->extra_stats.eberr++; | |
0bbaf069 | 2386 | if (netif_msg_rx_err(priv)) |
538cc7ee | 2387 | printk(KERN_DEBUG "%s: bus error\n", dev->name); |
1da177e4 | 2388 | } |
0bbaf069 | 2389 | if ((events & IEVENT_RXC) && netif_msg_rx_status(priv)) |
538cc7ee | 2390 | printk(KERN_DEBUG "%s: control frame\n", dev->name); |
1da177e4 LT |
2391 | |
2392 | if (events & IEVENT_BABT) { | |
2393 | priv->extra_stats.tx_babt++; | |
0bbaf069 | 2394 | if (netif_msg_tx_err(priv)) |
538cc7ee | 2395 | printk(KERN_DEBUG "%s: babbling TX error\n", dev->name); |
1da177e4 LT |
2396 | } |
2397 | return IRQ_HANDLED; | |
2398 | } | |
2399 | ||
b31a1d8b AF |
2400 | static struct of_device_id gfar_match[] = |
2401 | { | |
2402 | { | |
2403 | .type = "network", | |
2404 | .compatible = "gianfar", | |
2405 | }, | |
2406 | {}, | |
2407 | }; | |
e72701ac | 2408 | MODULE_DEVICE_TABLE(of, gfar_match); |
b31a1d8b | 2409 | |
1da177e4 | 2410 | /* Structure for a device driver */ |
b31a1d8b AF |
2411 | static struct of_platform_driver gfar_driver = { |
2412 | .name = "fsl-gianfar", | |
2413 | .match_table = gfar_match, | |
2414 | ||
1da177e4 LT |
2415 | .probe = gfar_probe, |
2416 | .remove = gfar_remove, | |
be926fc4 AV |
2417 | .suspend = gfar_legacy_suspend, |
2418 | .resume = gfar_legacy_resume, | |
2419 | .driver.pm = GFAR_PM_OPS, | |
1da177e4 LT |
2420 | }; |
2421 | ||
2422 | static int __init gfar_init(void) | |
2423 | { | |
1577ecef | 2424 | return of_register_platform_driver(&gfar_driver); |
1da177e4 LT |
2425 | } |
2426 | ||
2427 | static void __exit gfar_exit(void) | |
2428 | { | |
b31a1d8b | 2429 | of_unregister_platform_driver(&gfar_driver); |
1da177e4 LT |
2430 | } |
2431 | ||
2432 | module_init(gfar_init); | |
2433 | module_exit(gfar_exit); | |
2434 |