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Commit | Line | Data |
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0bbaf069 | 1 | /* |
1da177e4 LT |
2 | * drivers/net/gianfar.c |
3 | * | |
4 | * Gianfar Ethernet Driver | |
7f7f5316 AF |
5 | * This driver is designed for the non-CPM ethernet controllers |
6 | * on the 85xx and 83xx family of integrated processors | |
1da177e4 LT |
7 | * Based on 8260_io/fcc_enet.c |
8 | * | |
9 | * Author: Andy Fleming | |
4c8d3d99 | 10 | * Maintainer: Kumar Gala |
1da177e4 | 11 | * |
e8a2b6a4 | 12 | * Copyright (c) 2002-2006 Freescale Semiconductor, Inc. |
538cc7ee | 13 | * Copyright (c) 2007 MontaVista Software, Inc. |
1da177e4 LT |
14 | * |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2 of the License, or (at your | |
18 | * option) any later version. | |
19 | * | |
20 | * Gianfar: AKA Lambda Draconis, "Dragon" | |
21 | * RA 11 31 24.2 | |
22 | * Dec +69 19 52 | |
23 | * V 3.84 | |
24 | * B-V +1.62 | |
25 | * | |
26 | * Theory of operation | |
0bbaf069 | 27 | * |
1da177e4 LT |
28 | * The driver is initialized through platform_device. Structures which |
29 | * define the configuration needed by the board are defined in a | |
30 | * board structure in arch/ppc/platforms (though I do not | |
31 | * discount the possibility that other architectures could one | |
bb40dcbb | 32 | * day be supported. |
1da177e4 LT |
33 | * |
34 | * The Gianfar Ethernet Controller uses a ring of buffer | |
35 | * descriptors. The beginning is indicated by a register | |
0bbaf069 KG |
36 | * pointing to the physical address of the start of the ring. |
37 | * The end is determined by a "wrap" bit being set in the | |
1da177e4 LT |
38 | * last descriptor of the ring. |
39 | * | |
40 | * When a packet is received, the RXF bit in the | |
0bbaf069 | 41 | * IEVENT register is set, triggering an interrupt when the |
1da177e4 LT |
42 | * corresponding bit in the IMASK register is also set (if |
43 | * interrupt coalescing is active, then the interrupt may not | |
44 | * happen immediately, but will wait until either a set number | |
bb40dcbb | 45 | * of frames or amount of time have passed). In NAPI, the |
1da177e4 | 46 | * interrupt handler will signal there is work to be done, and |
0aa1538f | 47 | * exit. This method will start at the last known empty |
0bbaf069 | 48 | * descriptor, and process every subsequent descriptor until there |
1da177e4 LT |
49 | * are none left with data (NAPI will stop after a set number of |
50 | * packets to give time to other tasks, but will eventually | |
51 | * process all the packets). The data arrives inside a | |
52 | * pre-allocated skb, and so after the skb is passed up to the | |
53 | * stack, a new skb must be allocated, and the address field in | |
54 | * the buffer descriptor must be updated to indicate this new | |
55 | * skb. | |
56 | * | |
57 | * When the kernel requests that a packet be transmitted, the | |
58 | * driver starts where it left off last time, and points the | |
59 | * descriptor at the buffer which was passed in. The driver | |
60 | * then informs the DMA engine that there are packets ready to | |
61 | * be transmitted. Once the controller is finished transmitting | |
62 | * the packet, an interrupt may be triggered (under the same | |
63 | * conditions as for reception, but depending on the TXF bit). | |
64 | * The driver then cleans up the buffer. | |
65 | */ | |
66 | ||
1da177e4 | 67 | #include <linux/kernel.h> |
1da177e4 LT |
68 | #include <linux/string.h> |
69 | #include <linux/errno.h> | |
bb40dcbb | 70 | #include <linux/unistd.h> |
1da177e4 LT |
71 | #include <linux/slab.h> |
72 | #include <linux/interrupt.h> | |
73 | #include <linux/init.h> | |
74 | #include <linux/delay.h> | |
75 | #include <linux/netdevice.h> | |
76 | #include <linux/etherdevice.h> | |
77 | #include <linux/skbuff.h> | |
0bbaf069 | 78 | #include <linux/if_vlan.h> |
1da177e4 LT |
79 | #include <linux/spinlock.h> |
80 | #include <linux/mm.h> | |
d052d1be | 81 | #include <linux/platform_device.h> |
0bbaf069 KG |
82 | #include <linux/ip.h> |
83 | #include <linux/tcp.h> | |
84 | #include <linux/udp.h> | |
9c07b884 | 85 | #include <linux/in.h> |
1da177e4 LT |
86 | |
87 | #include <asm/io.h> | |
88 | #include <asm/irq.h> | |
89 | #include <asm/uaccess.h> | |
90 | #include <linux/module.h> | |
1da177e4 LT |
91 | #include <linux/dma-mapping.h> |
92 | #include <linux/crc32.h> | |
bb40dcbb AF |
93 | #include <linux/mii.h> |
94 | #include <linux/phy.h> | |
1da177e4 LT |
95 | |
96 | #include "gianfar.h" | |
bb40dcbb | 97 | #include "gianfar_mii.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); | |
3ae5eaec RK |
122 | static int gfar_probe(struct platform_device *pdev); |
123 | static int gfar_remove(struct platform_device *pdev); | |
bb40dcbb | 124 | static void free_skb_resources(struct gfar_private *priv); |
1da177e4 LT |
125 | static void gfar_set_multi(struct net_device *dev); |
126 | static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr); | |
d3c12873 | 127 | static void gfar_configure_serdes(struct net_device *dev); |
bea3348e | 128 | static int gfar_poll(struct napi_struct *napi, int budget); |
f2d71c2d VW |
129 | #ifdef CONFIG_NET_POLL_CONTROLLER |
130 | static void gfar_netpoll(struct net_device *dev); | |
131 | #endif | |
0bbaf069 | 132 | int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit); |
f162b9d5 | 133 | static int gfar_clean_tx_ring(struct net_device *dev); |
1da177e4 | 134 | static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length); |
0bbaf069 KG |
135 | static void gfar_vlan_rx_register(struct net_device *netdev, |
136 | struct vlan_group *grp); | |
7f7f5316 | 137 | void gfar_halt(struct net_device *dev); |
d87eb127 | 138 | static void gfar_halt_nodisable(struct net_device *dev); |
7f7f5316 AF |
139 | void gfar_start(struct net_device *dev); |
140 | static void gfar_clear_exact_match(struct net_device *dev); | |
141 | static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr); | |
1da177e4 | 142 | |
7282d491 | 143 | extern const struct ethtool_ops gfar_ethtool_ops; |
1da177e4 LT |
144 | |
145 | MODULE_AUTHOR("Freescale Semiconductor, Inc"); | |
146 | MODULE_DESCRIPTION("Gianfar Ethernet Driver"); | |
147 | MODULE_LICENSE("GPL"); | |
148 | ||
7f7f5316 AF |
149 | /* Returns 1 if incoming frames use an FCB */ |
150 | static inline int gfar_uses_fcb(struct gfar_private *priv) | |
0bbaf069 | 151 | { |
7f7f5316 | 152 | return (priv->vlan_enable || priv->rx_csum_enable); |
0bbaf069 | 153 | } |
bb40dcbb AF |
154 | |
155 | /* Set up the ethernet device structure, private data, | |
156 | * and anything else we need before we start */ | |
3ae5eaec | 157 | static int gfar_probe(struct platform_device *pdev) |
1da177e4 LT |
158 | { |
159 | u32 tempval; | |
160 | struct net_device *dev = NULL; | |
161 | struct gfar_private *priv = NULL; | |
1da177e4 LT |
162 | struct gianfar_platform_data *einfo; |
163 | struct resource *r; | |
d51894f4 | 164 | int err = 0, irq; |
0795af57 | 165 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
166 | |
167 | einfo = (struct gianfar_platform_data *) pdev->dev.platform_data; | |
168 | ||
bb40dcbb | 169 | if (NULL == einfo) { |
1da177e4 LT |
170 | printk(KERN_ERR "gfar %d: Missing additional data!\n", |
171 | pdev->id); | |
172 | ||
173 | return -ENODEV; | |
174 | } | |
175 | ||
176 | /* Create an ethernet device instance */ | |
177 | dev = alloc_etherdev(sizeof (*priv)); | |
178 | ||
bb40dcbb | 179 | if (NULL == dev) |
1da177e4 LT |
180 | return -ENOMEM; |
181 | ||
182 | priv = netdev_priv(dev); | |
bea3348e | 183 | priv->dev = dev; |
1da177e4 LT |
184 | |
185 | /* Set the info in the priv to the current info */ | |
186 | priv->einfo = einfo; | |
187 | ||
188 | /* fill out IRQ fields */ | |
189 | if (einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
d51894f4 | 190 | irq = platform_get_irq_byname(pdev, "tx"); |
191 | if (irq < 0) | |
48944738 | 192 | goto regs_fail; |
d51894f4 | 193 | priv->interruptTransmit = irq; |
194 | ||
195 | irq = platform_get_irq_byname(pdev, "rx"); | |
196 | if (irq < 0) | |
197 | goto regs_fail; | |
198 | priv->interruptReceive = irq; | |
199 | ||
200 | irq = platform_get_irq_byname(pdev, "error"); | |
201 | if (irq < 0) | |
202 | goto regs_fail; | |
203 | priv->interruptError = irq; | |
1da177e4 | 204 | } else { |
d51894f4 | 205 | irq = platform_get_irq(pdev, 0); |
206 | if (irq < 0) | |
48944738 | 207 | goto regs_fail; |
d51894f4 | 208 | priv->interruptTransmit = irq; |
1da177e4 LT |
209 | } |
210 | ||
211 | /* get a pointer to the register memory */ | |
212 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
cc8c6e37 | 213 | priv->regs = ioremap(r->start, sizeof (struct gfar)); |
1da177e4 | 214 | |
bb40dcbb | 215 | if (NULL == priv->regs) { |
1da177e4 LT |
216 | err = -ENOMEM; |
217 | goto regs_fail; | |
218 | } | |
219 | ||
fef6108d AF |
220 | spin_lock_init(&priv->txlock); |
221 | spin_lock_init(&priv->rxlock); | |
d87eb127 | 222 | spin_lock_init(&priv->bflock); |
ab939905 | 223 | INIT_WORK(&priv->reset_task, gfar_reset_task); |
1da177e4 | 224 | |
3ae5eaec | 225 | platform_set_drvdata(pdev, dev); |
1da177e4 LT |
226 | |
227 | /* Stop the DMA engine now, in case it was running before */ | |
228 | /* (The firmware could have used it, and left it running). */ | |
229 | /* To do this, we write Graceful Receive Stop and Graceful */ | |
230 | /* Transmit Stop, and then wait until the corresponding bits */ | |
231 | /* in IEVENT indicate the stops have completed. */ | |
232 | tempval = gfar_read(&priv->regs->dmactrl); | |
233 | tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); | |
234 | gfar_write(&priv->regs->dmactrl, tempval); | |
235 | ||
236 | tempval = gfar_read(&priv->regs->dmactrl); | |
237 | tempval |= (DMACTRL_GRS | DMACTRL_GTS); | |
238 | gfar_write(&priv->regs->dmactrl, tempval); | |
239 | ||
240 | while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC))) | |
241 | cpu_relax(); | |
242 | ||
243 | /* Reset MAC layer */ | |
244 | gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET); | |
245 | ||
246 | tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW); | |
247 | gfar_write(&priv->regs->maccfg1, tempval); | |
248 | ||
249 | /* Initialize MACCFG2. */ | |
250 | gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS); | |
251 | ||
252 | /* Initialize ECNTRL */ | |
253 | gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS); | |
254 | ||
255 | /* Copy the station address into the dev structure, */ | |
256 | memcpy(dev->dev_addr, einfo->mac_addr, MAC_ADDR_LEN); | |
257 | ||
258 | /* Set the dev->base_addr to the gfar reg region */ | |
259 | dev->base_addr = (unsigned long) (priv->regs); | |
260 | ||
3ae5eaec | 261 | SET_NETDEV_DEV(dev, &pdev->dev); |
1da177e4 LT |
262 | |
263 | /* Fill in the dev structure */ | |
264 | dev->open = gfar_enet_open; | |
265 | dev->hard_start_xmit = gfar_start_xmit; | |
266 | dev->tx_timeout = gfar_timeout; | |
267 | dev->watchdog_timeo = TX_TIMEOUT; | |
bea3348e | 268 | netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT); |
f2d71c2d VW |
269 | #ifdef CONFIG_NET_POLL_CONTROLLER |
270 | dev->poll_controller = gfar_netpoll; | |
1da177e4 LT |
271 | #endif |
272 | dev->stop = gfar_close; | |
1da177e4 LT |
273 | dev->change_mtu = gfar_change_mtu; |
274 | dev->mtu = 1500; | |
275 | dev->set_multicast_list = gfar_set_multi; | |
276 | ||
0bbaf069 KG |
277 | dev->ethtool_ops = &gfar_ethtool_ops; |
278 | ||
279 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) { | |
280 | priv->rx_csum_enable = 1; | |
281 | dev->features |= NETIF_F_IP_CSUM; | |
282 | } else | |
283 | priv->rx_csum_enable = 0; | |
284 | ||
285 | priv->vlgrp = NULL; | |
1da177e4 | 286 | |
0bbaf069 KG |
287 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) { |
288 | dev->vlan_rx_register = gfar_vlan_rx_register; | |
1da177e4 | 289 | |
0bbaf069 KG |
290 | dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; |
291 | ||
292 | priv->vlan_enable = 1; | |
293 | } | |
294 | ||
295 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) { | |
296 | priv->extended_hash = 1; | |
297 | priv->hash_width = 9; | |
298 | ||
299 | priv->hash_regs[0] = &priv->regs->igaddr0; | |
300 | priv->hash_regs[1] = &priv->regs->igaddr1; | |
301 | priv->hash_regs[2] = &priv->regs->igaddr2; | |
302 | priv->hash_regs[3] = &priv->regs->igaddr3; | |
303 | priv->hash_regs[4] = &priv->regs->igaddr4; | |
304 | priv->hash_regs[5] = &priv->regs->igaddr5; | |
305 | priv->hash_regs[6] = &priv->regs->igaddr6; | |
306 | priv->hash_regs[7] = &priv->regs->igaddr7; | |
307 | priv->hash_regs[8] = &priv->regs->gaddr0; | |
308 | priv->hash_regs[9] = &priv->regs->gaddr1; | |
309 | priv->hash_regs[10] = &priv->regs->gaddr2; | |
310 | priv->hash_regs[11] = &priv->regs->gaddr3; | |
311 | priv->hash_regs[12] = &priv->regs->gaddr4; | |
312 | priv->hash_regs[13] = &priv->regs->gaddr5; | |
313 | priv->hash_regs[14] = &priv->regs->gaddr6; | |
314 | priv->hash_regs[15] = &priv->regs->gaddr7; | |
315 | ||
316 | } else { | |
317 | priv->extended_hash = 0; | |
318 | priv->hash_width = 8; | |
319 | ||
320 | priv->hash_regs[0] = &priv->regs->gaddr0; | |
321 | priv->hash_regs[1] = &priv->regs->gaddr1; | |
322 | priv->hash_regs[2] = &priv->regs->gaddr2; | |
323 | priv->hash_regs[3] = &priv->regs->gaddr3; | |
324 | priv->hash_regs[4] = &priv->regs->gaddr4; | |
325 | priv->hash_regs[5] = &priv->regs->gaddr5; | |
326 | priv->hash_regs[6] = &priv->regs->gaddr6; | |
327 | priv->hash_regs[7] = &priv->regs->gaddr7; | |
328 | } | |
329 | ||
330 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_PADDING) | |
331 | priv->padding = DEFAULT_PADDING; | |
332 | else | |
333 | priv->padding = 0; | |
334 | ||
0bbaf069 KG |
335 | if (dev->features & NETIF_F_IP_CSUM) |
336 | dev->hard_header_len += GMAC_FCB_LEN; | |
1da177e4 LT |
337 | |
338 | priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE; | |
1da177e4 LT |
339 | priv->tx_ring_size = DEFAULT_TX_RING_SIZE; |
340 | priv->rx_ring_size = DEFAULT_RX_RING_SIZE; | |
341 | ||
342 | priv->txcoalescing = DEFAULT_TX_COALESCE; | |
343 | priv->txcount = DEFAULT_TXCOUNT; | |
344 | priv->txtime = DEFAULT_TXTIME; | |
345 | priv->rxcoalescing = DEFAULT_RX_COALESCE; | |
346 | priv->rxcount = DEFAULT_RXCOUNT; | |
347 | priv->rxtime = DEFAULT_RXTIME; | |
348 | ||
0bbaf069 KG |
349 | /* Enable most messages by default */ |
350 | priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; | |
351 | ||
d3eab82b TP |
352 | /* Carrier starts down, phylib will bring it up */ |
353 | netif_carrier_off(dev); | |
354 | ||
1da177e4 LT |
355 | err = register_netdev(dev); |
356 | ||
357 | if (err) { | |
358 | printk(KERN_ERR "%s: Cannot register net device, aborting.\n", | |
359 | dev->name); | |
360 | goto register_fail; | |
361 | } | |
362 | ||
7f7f5316 AF |
363 | /* Create all the sysfs files */ |
364 | gfar_init_sysfs(dev); | |
365 | ||
1da177e4 | 366 | /* Print out the device info */ |
0795af57 JP |
367 | printk(KERN_INFO DEVICE_NAME "%s\n", |
368 | dev->name, print_mac(mac, dev->dev_addr)); | |
1da177e4 LT |
369 | |
370 | /* Even more device info helps when determining which kernel */ | |
7f7f5316 | 371 | /* provided which set of benchmarks. */ |
1da177e4 | 372 | printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name); |
1da177e4 LT |
373 | printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n", |
374 | dev->name, priv->rx_ring_size, priv->tx_ring_size); | |
375 | ||
376 | return 0; | |
377 | ||
378 | register_fail: | |
cc8c6e37 | 379 | iounmap(priv->regs); |
1da177e4 LT |
380 | regs_fail: |
381 | free_netdev(dev); | |
bb40dcbb | 382 | return err; |
1da177e4 LT |
383 | } |
384 | ||
3ae5eaec | 385 | static int gfar_remove(struct platform_device *pdev) |
1da177e4 | 386 | { |
3ae5eaec | 387 | struct net_device *dev = platform_get_drvdata(pdev); |
1da177e4 LT |
388 | struct gfar_private *priv = netdev_priv(dev); |
389 | ||
3ae5eaec | 390 | platform_set_drvdata(pdev, NULL); |
1da177e4 | 391 | |
cc8c6e37 | 392 | iounmap(priv->regs); |
1da177e4 LT |
393 | free_netdev(dev); |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
d87eb127 SW |
398 | #ifdef CONFIG_PM |
399 | static int gfar_suspend(struct platform_device *pdev, pm_message_t state) | |
400 | { | |
401 | struct net_device *dev = platform_get_drvdata(pdev); | |
402 | struct gfar_private *priv = netdev_priv(dev); | |
403 | unsigned long flags; | |
404 | u32 tempval; | |
405 | ||
406 | int magic_packet = priv->wol_en && | |
407 | (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); | |
408 | ||
409 | netif_device_detach(dev); | |
410 | ||
411 | if (netif_running(dev)) { | |
412 | spin_lock_irqsave(&priv->txlock, flags); | |
413 | spin_lock(&priv->rxlock); | |
414 | ||
415 | gfar_halt_nodisable(dev); | |
416 | ||
417 | /* Disable Tx, and Rx if wake-on-LAN is disabled. */ | |
418 | tempval = gfar_read(&priv->regs->maccfg1); | |
419 | ||
420 | tempval &= ~MACCFG1_TX_EN; | |
421 | ||
422 | if (!magic_packet) | |
423 | tempval &= ~MACCFG1_RX_EN; | |
424 | ||
425 | gfar_write(&priv->regs->maccfg1, tempval); | |
426 | ||
427 | spin_unlock(&priv->rxlock); | |
428 | spin_unlock_irqrestore(&priv->txlock, flags); | |
429 | ||
d87eb127 | 430 | napi_disable(&priv->napi); |
d87eb127 SW |
431 | |
432 | if (magic_packet) { | |
433 | /* Enable interrupt on Magic Packet */ | |
434 | gfar_write(&priv->regs->imask, IMASK_MAG); | |
435 | ||
436 | /* Enable Magic Packet mode */ | |
437 | tempval = gfar_read(&priv->regs->maccfg2); | |
438 | tempval |= MACCFG2_MPEN; | |
439 | gfar_write(&priv->regs->maccfg2, tempval); | |
440 | } else { | |
441 | phy_stop(priv->phydev); | |
442 | } | |
443 | } | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | static int gfar_resume(struct platform_device *pdev) | |
449 | { | |
450 | struct net_device *dev = platform_get_drvdata(pdev); | |
451 | struct gfar_private *priv = netdev_priv(dev); | |
452 | unsigned long flags; | |
453 | u32 tempval; | |
454 | int magic_packet = priv->wol_en && | |
455 | (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); | |
456 | ||
457 | if (!netif_running(dev)) { | |
458 | netif_device_attach(dev); | |
459 | return 0; | |
460 | } | |
461 | ||
462 | if (!magic_packet && priv->phydev) | |
463 | phy_start(priv->phydev); | |
464 | ||
465 | /* Disable Magic Packet mode, in case something | |
466 | * else woke us up. | |
467 | */ | |
468 | ||
469 | spin_lock_irqsave(&priv->txlock, flags); | |
470 | spin_lock(&priv->rxlock); | |
471 | ||
472 | tempval = gfar_read(&priv->regs->maccfg2); | |
473 | tempval &= ~MACCFG2_MPEN; | |
474 | gfar_write(&priv->regs->maccfg2, tempval); | |
475 | ||
476 | gfar_start(dev); | |
477 | ||
478 | spin_unlock(&priv->rxlock); | |
479 | spin_unlock_irqrestore(&priv->txlock, flags); | |
480 | ||
481 | netif_device_attach(dev); | |
482 | ||
d87eb127 | 483 | napi_enable(&priv->napi); |
d87eb127 SW |
484 | |
485 | return 0; | |
486 | } | |
487 | #else | |
488 | #define gfar_suspend NULL | |
489 | #define gfar_resume NULL | |
490 | #endif | |
1da177e4 | 491 | |
e8a2b6a4 AF |
492 | /* Reads the controller's registers to determine what interface |
493 | * connects it to the PHY. | |
494 | */ | |
495 | static phy_interface_t gfar_get_interface(struct net_device *dev) | |
496 | { | |
497 | struct gfar_private *priv = netdev_priv(dev); | |
498 | u32 ecntrl = gfar_read(&priv->regs->ecntrl); | |
499 | ||
500 | if (ecntrl & ECNTRL_SGMII_MODE) | |
501 | return PHY_INTERFACE_MODE_SGMII; | |
502 | ||
503 | if (ecntrl & ECNTRL_TBI_MODE) { | |
504 | if (ecntrl & ECNTRL_REDUCED_MODE) | |
505 | return PHY_INTERFACE_MODE_RTBI; | |
506 | else | |
507 | return PHY_INTERFACE_MODE_TBI; | |
508 | } | |
509 | ||
510 | if (ecntrl & ECNTRL_REDUCED_MODE) { | |
511 | if (ecntrl & ECNTRL_REDUCED_MII_MODE) | |
512 | return PHY_INTERFACE_MODE_RMII; | |
7132ab7f AF |
513 | else { |
514 | phy_interface_t interface = priv->einfo->interface; | |
515 | ||
516 | /* | |
517 | * This isn't autodetected right now, so it must | |
518 | * be set by the device tree or platform code. | |
519 | */ | |
520 | if (interface == PHY_INTERFACE_MODE_RGMII_ID) | |
521 | return PHY_INTERFACE_MODE_RGMII_ID; | |
522 | ||
e8a2b6a4 | 523 | return PHY_INTERFACE_MODE_RGMII; |
7132ab7f | 524 | } |
e8a2b6a4 AF |
525 | } |
526 | ||
527 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT) | |
528 | return PHY_INTERFACE_MODE_GMII; | |
529 | ||
530 | return PHY_INTERFACE_MODE_MII; | |
531 | } | |
532 | ||
533 | ||
bb40dcbb AF |
534 | /* Initializes driver's PHY state, and attaches to the PHY. |
535 | * Returns 0 on success. | |
1da177e4 LT |
536 | */ |
537 | static int init_phy(struct net_device *dev) | |
538 | { | |
539 | struct gfar_private *priv = netdev_priv(dev); | |
bb40dcbb AF |
540 | uint gigabit_support = |
541 | priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ? | |
542 | SUPPORTED_1000baseT_Full : 0; | |
543 | struct phy_device *phydev; | |
4d3248a2 | 544 | char phy_id[BUS_ID_SIZE]; |
e8a2b6a4 | 545 | phy_interface_t interface; |
1da177e4 LT |
546 | |
547 | priv->oldlink = 0; | |
548 | priv->oldspeed = 0; | |
549 | priv->oldduplex = -1; | |
550 | ||
4d3248a2 KG |
551 | snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, priv->einfo->bus_id, priv->einfo->phy_id); |
552 | ||
e8a2b6a4 AF |
553 | interface = gfar_get_interface(dev); |
554 | ||
555 | phydev = phy_connect(dev, phy_id, &adjust_link, 0, interface); | |
1da177e4 | 556 | |
d3c12873 KJ |
557 | if (interface == PHY_INTERFACE_MODE_SGMII) |
558 | gfar_configure_serdes(dev); | |
559 | ||
bb40dcbb AF |
560 | if (IS_ERR(phydev)) { |
561 | printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); | |
562 | return PTR_ERR(phydev); | |
1da177e4 LT |
563 | } |
564 | ||
bb40dcbb AF |
565 | /* Remove any features not supported by the controller */ |
566 | phydev->supported &= (GFAR_SUPPORTED | gigabit_support); | |
567 | phydev->advertising = phydev->supported; | |
1da177e4 | 568 | |
bb40dcbb | 569 | priv->phydev = phydev; |
1da177e4 LT |
570 | |
571 | return 0; | |
1da177e4 LT |
572 | } |
573 | ||
d0313587 PG |
574 | /* |
575 | * Initialize TBI PHY interface for communicating with the | |
576 | * SERDES lynx PHY on the chip. We communicate with this PHY | |
577 | * through the MDIO bus on each controller, treating it as a | |
578 | * "normal" PHY at the address found in the TBIPA register. We assume | |
579 | * that the TBIPA register is valid. Either the MDIO bus code will set | |
580 | * it to a value that doesn't conflict with other PHYs on the bus, or the | |
581 | * value doesn't matter, as there are no other PHYs on the bus. | |
582 | */ | |
d3c12873 KJ |
583 | static void gfar_configure_serdes(struct net_device *dev) |
584 | { | |
585 | struct gfar_private *priv = netdev_priv(dev); | |
586 | struct gfar_mii __iomem *regs = | |
587 | (void __iomem *)&priv->regs->gfar_mii_regs; | |
d0313587 | 588 | int tbipa = gfar_read(&priv->regs->tbipa); |
c132419e TP |
589 | struct mii_bus *bus = gfar_get_miibus(priv); |
590 | ||
591 | if (bus) | |
592 | mutex_lock(&bus->mdio_lock); | |
d3c12873 | 593 | |
d0313587 PG |
594 | /* Single clk mode, mii mode off(for serdes communication) */ |
595 | gfar_local_mdio_write(regs, tbipa, MII_TBICON, TBICON_CLK_SELECT); | |
d3c12873 | 596 | |
d0313587 | 597 | gfar_local_mdio_write(regs, tbipa, MII_ADVERTISE, |
d3c12873 KJ |
598 | ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | |
599 | ADVERTISE_1000XPSE_ASYM); | |
600 | ||
d0313587 | 601 | gfar_local_mdio_write(regs, tbipa, MII_BMCR, BMCR_ANENABLE | |
d3c12873 | 602 | BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000); |
c132419e TP |
603 | |
604 | if (bus) | |
605 | mutex_unlock(&bus->mdio_lock); | |
d3c12873 KJ |
606 | } |
607 | ||
1da177e4 LT |
608 | static void init_registers(struct net_device *dev) |
609 | { | |
610 | struct gfar_private *priv = netdev_priv(dev); | |
611 | ||
612 | /* Clear IEVENT */ | |
613 | gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR); | |
614 | ||
615 | /* Initialize IMASK */ | |
616 | gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR); | |
617 | ||
618 | /* Init hash registers to zero */ | |
0bbaf069 KG |
619 | gfar_write(&priv->regs->igaddr0, 0); |
620 | gfar_write(&priv->regs->igaddr1, 0); | |
621 | gfar_write(&priv->regs->igaddr2, 0); | |
622 | gfar_write(&priv->regs->igaddr3, 0); | |
623 | gfar_write(&priv->regs->igaddr4, 0); | |
624 | gfar_write(&priv->regs->igaddr5, 0); | |
625 | gfar_write(&priv->regs->igaddr6, 0); | |
626 | gfar_write(&priv->regs->igaddr7, 0); | |
1da177e4 LT |
627 | |
628 | gfar_write(&priv->regs->gaddr0, 0); | |
629 | gfar_write(&priv->regs->gaddr1, 0); | |
630 | gfar_write(&priv->regs->gaddr2, 0); | |
631 | gfar_write(&priv->regs->gaddr3, 0); | |
632 | gfar_write(&priv->regs->gaddr4, 0); | |
633 | gfar_write(&priv->regs->gaddr5, 0); | |
634 | gfar_write(&priv->regs->gaddr6, 0); | |
635 | gfar_write(&priv->regs->gaddr7, 0); | |
636 | ||
1da177e4 LT |
637 | /* Zero out the rmon mib registers if it has them */ |
638 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { | |
cc8c6e37 | 639 | memset_io(&(priv->regs->rmon), 0, sizeof (struct rmon_mib)); |
1da177e4 LT |
640 | |
641 | /* Mask off the CAM interrupts */ | |
642 | gfar_write(&priv->regs->rmon.cam1, 0xffffffff); | |
643 | gfar_write(&priv->regs->rmon.cam2, 0xffffffff); | |
644 | } | |
645 | ||
646 | /* Initialize the max receive buffer length */ | |
647 | gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); | |
648 | ||
1da177e4 LT |
649 | /* Initialize the Minimum Frame Length Register */ |
650 | gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS); | |
1da177e4 LT |
651 | } |
652 | ||
0bbaf069 KG |
653 | |
654 | /* Halt the receive and transmit queues */ | |
d87eb127 | 655 | static void gfar_halt_nodisable(struct net_device *dev) |
1da177e4 LT |
656 | { |
657 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 658 | struct gfar __iomem *regs = priv->regs; |
1da177e4 LT |
659 | u32 tempval; |
660 | ||
1da177e4 LT |
661 | /* Mask all interrupts */ |
662 | gfar_write(®s->imask, IMASK_INIT_CLEAR); | |
663 | ||
664 | /* Clear all interrupts */ | |
665 | gfar_write(®s->ievent, IEVENT_INIT_CLEAR); | |
666 | ||
667 | /* Stop the DMA, and wait for it to stop */ | |
668 | tempval = gfar_read(&priv->regs->dmactrl); | |
669 | if ((tempval & (DMACTRL_GRS | DMACTRL_GTS)) | |
670 | != (DMACTRL_GRS | DMACTRL_GTS)) { | |
671 | tempval |= (DMACTRL_GRS | DMACTRL_GTS); | |
672 | gfar_write(&priv->regs->dmactrl, tempval); | |
673 | ||
674 | while (!(gfar_read(&priv->regs->ievent) & | |
675 | (IEVENT_GRSC | IEVENT_GTSC))) | |
676 | cpu_relax(); | |
677 | } | |
d87eb127 | 678 | } |
d87eb127 SW |
679 | |
680 | /* Halt the receive and transmit queues */ | |
681 | void gfar_halt(struct net_device *dev) | |
682 | { | |
683 | struct gfar_private *priv = netdev_priv(dev); | |
684 | struct gfar __iomem *regs = priv->regs; | |
685 | u32 tempval; | |
1da177e4 | 686 | |
2a54adc3 SW |
687 | gfar_halt_nodisable(dev); |
688 | ||
1da177e4 LT |
689 | /* Disable Rx and Tx */ |
690 | tempval = gfar_read(®s->maccfg1); | |
691 | tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN); | |
692 | gfar_write(®s->maccfg1, tempval); | |
0bbaf069 KG |
693 | } |
694 | ||
695 | void stop_gfar(struct net_device *dev) | |
696 | { | |
697 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 698 | struct gfar __iomem *regs = priv->regs; |
0bbaf069 KG |
699 | unsigned long flags; |
700 | ||
bb40dcbb AF |
701 | phy_stop(priv->phydev); |
702 | ||
0bbaf069 | 703 | /* Lock it down */ |
fef6108d AF |
704 | spin_lock_irqsave(&priv->txlock, flags); |
705 | spin_lock(&priv->rxlock); | |
0bbaf069 | 706 | |
0bbaf069 | 707 | gfar_halt(dev); |
1da177e4 | 708 | |
fef6108d AF |
709 | spin_unlock(&priv->rxlock); |
710 | spin_unlock_irqrestore(&priv->txlock, flags); | |
1da177e4 LT |
711 | |
712 | /* Free the IRQs */ | |
713 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
714 | free_irq(priv->interruptError, dev); | |
715 | free_irq(priv->interruptTransmit, dev); | |
716 | free_irq(priv->interruptReceive, dev); | |
717 | } else { | |
bb40dcbb | 718 | free_irq(priv->interruptTransmit, dev); |
1da177e4 LT |
719 | } |
720 | ||
721 | free_skb_resources(priv); | |
722 | ||
cf782298 | 723 | dma_free_coherent(&dev->dev, |
1da177e4 LT |
724 | sizeof(struct txbd8)*priv->tx_ring_size |
725 | + sizeof(struct rxbd8)*priv->rx_ring_size, | |
726 | priv->tx_bd_base, | |
0bbaf069 | 727 | gfar_read(®s->tbase0)); |
1da177e4 LT |
728 | } |
729 | ||
730 | /* If there are any tx skbs or rx skbs still around, free them. | |
731 | * Then free tx_skbuff and rx_skbuff */ | |
bb40dcbb | 732 | static void free_skb_resources(struct gfar_private *priv) |
1da177e4 LT |
733 | { |
734 | struct rxbd8 *rxbdp; | |
735 | struct txbd8 *txbdp; | |
736 | int i; | |
737 | ||
738 | /* Go through all the buffer descriptors and free their data buffers */ | |
739 | txbdp = priv->tx_bd_base; | |
740 | ||
741 | for (i = 0; i < priv->tx_ring_size; i++) { | |
742 | ||
743 | if (priv->tx_skbuff[i]) { | |
cf782298 | 744 | dma_unmap_single(&priv->dev->dev, txbdp->bufPtr, |
1da177e4 LT |
745 | txbdp->length, |
746 | DMA_TO_DEVICE); | |
747 | dev_kfree_skb_any(priv->tx_skbuff[i]); | |
748 | priv->tx_skbuff[i] = NULL; | |
749 | } | |
ad5da7ab AF |
750 | |
751 | txbdp++; | |
1da177e4 LT |
752 | } |
753 | ||
754 | kfree(priv->tx_skbuff); | |
755 | ||
756 | rxbdp = priv->rx_bd_base; | |
757 | ||
758 | /* rx_skbuff is not guaranteed to be allocated, so only | |
759 | * free it and its contents if it is allocated */ | |
760 | if(priv->rx_skbuff != NULL) { | |
761 | for (i = 0; i < priv->rx_ring_size; i++) { | |
762 | if (priv->rx_skbuff[i]) { | |
cf782298 | 763 | dma_unmap_single(&priv->dev->dev, rxbdp->bufPtr, |
7f7f5316 | 764 | priv->rx_buffer_size, |
1da177e4 LT |
765 | DMA_FROM_DEVICE); |
766 | ||
767 | dev_kfree_skb_any(priv->rx_skbuff[i]); | |
768 | priv->rx_skbuff[i] = NULL; | |
769 | } | |
770 | ||
771 | rxbdp->status = 0; | |
772 | rxbdp->length = 0; | |
773 | rxbdp->bufPtr = 0; | |
774 | ||
775 | rxbdp++; | |
776 | } | |
777 | ||
778 | kfree(priv->rx_skbuff); | |
779 | } | |
780 | } | |
781 | ||
0bbaf069 KG |
782 | void gfar_start(struct net_device *dev) |
783 | { | |
784 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 785 | struct gfar __iomem *regs = priv->regs; |
0bbaf069 KG |
786 | u32 tempval; |
787 | ||
788 | /* Enable Rx and Tx in MACCFG1 */ | |
789 | tempval = gfar_read(®s->maccfg1); | |
790 | tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN); | |
791 | gfar_write(®s->maccfg1, tempval); | |
792 | ||
793 | /* Initialize DMACTRL to have WWR and WOP */ | |
794 | tempval = gfar_read(&priv->regs->dmactrl); | |
795 | tempval |= DMACTRL_INIT_SETTINGS; | |
796 | gfar_write(&priv->regs->dmactrl, tempval); | |
797 | ||
0bbaf069 KG |
798 | /* Make sure we aren't stopped */ |
799 | tempval = gfar_read(&priv->regs->dmactrl); | |
800 | tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); | |
801 | gfar_write(&priv->regs->dmactrl, tempval); | |
802 | ||
fef6108d AF |
803 | /* Clear THLT/RHLT, so that the DMA starts polling now */ |
804 | gfar_write(®s->tstat, TSTAT_CLEAR_THALT); | |
805 | gfar_write(®s->rstat, RSTAT_CLEAR_RHALT); | |
806 | ||
0bbaf069 KG |
807 | /* Unmask the interrupts we look for */ |
808 | gfar_write(®s->imask, IMASK_DEFAULT); | |
809 | } | |
810 | ||
1da177e4 LT |
811 | /* Bring the controller up and running */ |
812 | int startup_gfar(struct net_device *dev) | |
813 | { | |
814 | struct txbd8 *txbdp; | |
815 | struct rxbd8 *rxbdp; | |
f9663aea | 816 | dma_addr_t addr = 0; |
1da177e4 LT |
817 | unsigned long vaddr; |
818 | int i; | |
819 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 820 | struct gfar __iomem *regs = priv->regs; |
1da177e4 | 821 | int err = 0; |
0bbaf069 | 822 | u32 rctrl = 0; |
7f7f5316 | 823 | u32 attrs = 0; |
1da177e4 LT |
824 | |
825 | gfar_write(®s->imask, IMASK_INIT_CLEAR); | |
826 | ||
827 | /* Allocate memory for the buffer descriptors */ | |
cf782298 | 828 | vaddr = (unsigned long) dma_alloc_coherent(&dev->dev, |
1da177e4 LT |
829 | sizeof (struct txbd8) * priv->tx_ring_size + |
830 | sizeof (struct rxbd8) * priv->rx_ring_size, | |
831 | &addr, GFP_KERNEL); | |
832 | ||
833 | if (vaddr == 0) { | |
0bbaf069 KG |
834 | if (netif_msg_ifup(priv)) |
835 | printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n", | |
836 | dev->name); | |
1da177e4 LT |
837 | return -ENOMEM; |
838 | } | |
839 | ||
840 | priv->tx_bd_base = (struct txbd8 *) vaddr; | |
841 | ||
842 | /* enet DMA only understands physical addresses */ | |
0bbaf069 | 843 | gfar_write(®s->tbase0, addr); |
1da177e4 LT |
844 | |
845 | /* Start the rx descriptor ring where the tx ring leaves off */ | |
846 | addr = addr + sizeof (struct txbd8) * priv->tx_ring_size; | |
847 | vaddr = vaddr + sizeof (struct txbd8) * priv->tx_ring_size; | |
848 | priv->rx_bd_base = (struct rxbd8 *) vaddr; | |
0bbaf069 | 849 | gfar_write(®s->rbase0, addr); |
1da177e4 LT |
850 | |
851 | /* Setup the skbuff rings */ | |
852 | priv->tx_skbuff = | |
853 | (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) * | |
854 | priv->tx_ring_size, GFP_KERNEL); | |
855 | ||
bb40dcbb | 856 | if (NULL == priv->tx_skbuff) { |
0bbaf069 KG |
857 | if (netif_msg_ifup(priv)) |
858 | printk(KERN_ERR "%s: Could not allocate tx_skbuff\n", | |
859 | dev->name); | |
1da177e4 LT |
860 | err = -ENOMEM; |
861 | goto tx_skb_fail; | |
862 | } | |
863 | ||
864 | for (i = 0; i < priv->tx_ring_size; i++) | |
865 | priv->tx_skbuff[i] = NULL; | |
866 | ||
867 | priv->rx_skbuff = | |
868 | (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) * | |
869 | priv->rx_ring_size, GFP_KERNEL); | |
870 | ||
bb40dcbb | 871 | if (NULL == priv->rx_skbuff) { |
0bbaf069 KG |
872 | if (netif_msg_ifup(priv)) |
873 | printk(KERN_ERR "%s: Could not allocate rx_skbuff\n", | |
874 | dev->name); | |
1da177e4 LT |
875 | err = -ENOMEM; |
876 | goto rx_skb_fail; | |
877 | } | |
878 | ||
879 | for (i = 0; i < priv->rx_ring_size; i++) | |
880 | priv->rx_skbuff[i] = NULL; | |
881 | ||
882 | /* Initialize some variables in our dev structure */ | |
883 | priv->dirty_tx = priv->cur_tx = priv->tx_bd_base; | |
884 | priv->cur_rx = priv->rx_bd_base; | |
885 | priv->skb_curtx = priv->skb_dirtytx = 0; | |
886 | priv->skb_currx = 0; | |
887 | ||
888 | /* Initialize Transmit Descriptor Ring */ | |
889 | txbdp = priv->tx_bd_base; | |
890 | for (i = 0; i < priv->tx_ring_size; i++) { | |
891 | txbdp->status = 0; | |
892 | txbdp->length = 0; | |
893 | txbdp->bufPtr = 0; | |
894 | txbdp++; | |
895 | } | |
896 | ||
897 | /* Set the last descriptor in the ring to indicate wrap */ | |
898 | txbdp--; | |
899 | txbdp->status |= TXBD_WRAP; | |
900 | ||
901 | rxbdp = priv->rx_bd_base; | |
902 | for (i = 0; i < priv->rx_ring_size; i++) { | |
815b97c6 | 903 | struct sk_buff *skb; |
1da177e4 | 904 | |
815b97c6 | 905 | skb = gfar_new_skb(dev); |
1da177e4 | 906 | |
815b97c6 AF |
907 | if (!skb) { |
908 | printk(KERN_ERR "%s: Can't allocate RX buffers\n", | |
909 | dev->name); | |
910 | ||
911 | goto err_rxalloc_fail; | |
912 | } | |
1da177e4 LT |
913 | |
914 | priv->rx_skbuff[i] = skb; | |
915 | ||
815b97c6 AF |
916 | gfar_new_rxbdp(dev, rxbdp, skb); |
917 | ||
1da177e4 LT |
918 | rxbdp++; |
919 | } | |
920 | ||
921 | /* Set the last descriptor in the ring to wrap */ | |
922 | rxbdp--; | |
923 | rxbdp->status |= RXBD_WRAP; | |
924 | ||
925 | /* If the device has multiple interrupts, register for | |
926 | * them. Otherwise, only register for the one */ | |
927 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
0bbaf069 | 928 | /* Install our interrupt handlers for Error, |
1da177e4 LT |
929 | * Transmit, and Receive */ |
930 | if (request_irq(priv->interruptError, gfar_error, | |
931 | 0, "enet_error", dev) < 0) { | |
0bbaf069 KG |
932 | if (netif_msg_intr(priv)) |
933 | printk(KERN_ERR "%s: Can't get IRQ %d\n", | |
934 | dev->name, priv->interruptError); | |
1da177e4 LT |
935 | |
936 | err = -1; | |
937 | goto err_irq_fail; | |
938 | } | |
939 | ||
940 | if (request_irq(priv->interruptTransmit, gfar_transmit, | |
941 | 0, "enet_tx", dev) < 0) { | |
0bbaf069 KG |
942 | if (netif_msg_intr(priv)) |
943 | printk(KERN_ERR "%s: Can't get IRQ %d\n", | |
944 | dev->name, priv->interruptTransmit); | |
1da177e4 LT |
945 | |
946 | err = -1; | |
947 | ||
948 | goto tx_irq_fail; | |
949 | } | |
950 | ||
951 | if (request_irq(priv->interruptReceive, gfar_receive, | |
952 | 0, "enet_rx", dev) < 0) { | |
0bbaf069 KG |
953 | if (netif_msg_intr(priv)) |
954 | printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n", | |
955 | dev->name, priv->interruptReceive); | |
1da177e4 LT |
956 | |
957 | err = -1; | |
958 | goto rx_irq_fail; | |
959 | } | |
960 | } else { | |
961 | if (request_irq(priv->interruptTransmit, gfar_interrupt, | |
962 | 0, "gfar_interrupt", dev) < 0) { | |
0bbaf069 KG |
963 | if (netif_msg_intr(priv)) |
964 | printk(KERN_ERR "%s: Can't get IRQ %d\n", | |
965 | dev->name, priv->interruptError); | |
1da177e4 LT |
966 | |
967 | err = -1; | |
968 | goto err_irq_fail; | |
969 | } | |
970 | } | |
971 | ||
bb40dcbb | 972 | phy_start(priv->phydev); |
1da177e4 LT |
973 | |
974 | /* Configure the coalescing support */ | |
975 | if (priv->txcoalescing) | |
976 | gfar_write(®s->txic, | |
977 | mk_ic_value(priv->txcount, priv->txtime)); | |
978 | else | |
979 | gfar_write(®s->txic, 0); | |
980 | ||
981 | if (priv->rxcoalescing) | |
982 | gfar_write(®s->rxic, | |
983 | mk_ic_value(priv->rxcount, priv->rxtime)); | |
984 | else | |
985 | gfar_write(®s->rxic, 0); | |
986 | ||
0bbaf069 KG |
987 | if (priv->rx_csum_enable) |
988 | rctrl |= RCTRL_CHECKSUMMING; | |
1da177e4 | 989 | |
7f7f5316 | 990 | if (priv->extended_hash) { |
0bbaf069 | 991 | rctrl |= RCTRL_EXTHASH; |
1da177e4 | 992 | |
7f7f5316 AF |
993 | gfar_clear_exact_match(dev); |
994 | rctrl |= RCTRL_EMEN; | |
995 | } | |
996 | ||
0bbaf069 KG |
997 | if (priv->vlan_enable) |
998 | rctrl |= RCTRL_VLAN; | |
1da177e4 | 999 | |
7f7f5316 AF |
1000 | if (priv->padding) { |
1001 | rctrl &= ~RCTRL_PAL_MASK; | |
1002 | rctrl |= RCTRL_PADDING(priv->padding); | |
1003 | } | |
1004 | ||
0bbaf069 KG |
1005 | /* Init rctrl based on our settings */ |
1006 | gfar_write(&priv->regs->rctrl, rctrl); | |
1da177e4 | 1007 | |
0bbaf069 KG |
1008 | if (dev->features & NETIF_F_IP_CSUM) |
1009 | gfar_write(&priv->regs->tctrl, TCTRL_INIT_CSUM); | |
1da177e4 | 1010 | |
7f7f5316 AF |
1011 | /* Set the extraction length and index */ |
1012 | attrs = ATTRELI_EL(priv->rx_stash_size) | | |
1013 | ATTRELI_EI(priv->rx_stash_index); | |
1014 | ||
1015 | gfar_write(&priv->regs->attreli, attrs); | |
1016 | ||
1017 | /* Start with defaults, and add stashing or locking | |
1018 | * depending on the approprate variables */ | |
1019 | attrs = ATTR_INIT_SETTINGS; | |
1020 | ||
1021 | if (priv->bd_stash_en) | |
1022 | attrs |= ATTR_BDSTASH; | |
1023 | ||
1024 | if (priv->rx_stash_size != 0) | |
1025 | attrs |= ATTR_BUFSTASH; | |
1026 | ||
1027 | gfar_write(&priv->regs->attr, attrs); | |
1028 | ||
1029 | gfar_write(&priv->regs->fifo_tx_thr, priv->fifo_threshold); | |
1030 | gfar_write(&priv->regs->fifo_tx_starve, priv->fifo_starve); | |
1031 | gfar_write(&priv->regs->fifo_tx_starve_shutoff, priv->fifo_starve_off); | |
1032 | ||
1033 | /* Start the controller */ | |
0bbaf069 | 1034 | gfar_start(dev); |
1da177e4 LT |
1035 | |
1036 | return 0; | |
1037 | ||
1038 | rx_irq_fail: | |
1039 | free_irq(priv->interruptTransmit, dev); | |
1040 | tx_irq_fail: | |
1041 | free_irq(priv->interruptError, dev); | |
1042 | err_irq_fail: | |
7d2e3cb7 | 1043 | err_rxalloc_fail: |
1da177e4 LT |
1044 | rx_skb_fail: |
1045 | free_skb_resources(priv); | |
1046 | tx_skb_fail: | |
cf782298 | 1047 | dma_free_coherent(&dev->dev, |
1da177e4 LT |
1048 | sizeof(struct txbd8)*priv->tx_ring_size |
1049 | + sizeof(struct rxbd8)*priv->rx_ring_size, | |
1050 | priv->tx_bd_base, | |
0bbaf069 | 1051 | gfar_read(®s->tbase0)); |
1da177e4 | 1052 | |
1da177e4 LT |
1053 | return err; |
1054 | } | |
1055 | ||
1056 | /* Called when something needs to use the ethernet device */ | |
1057 | /* Returns 0 for success. */ | |
1058 | static int gfar_enet_open(struct net_device *dev) | |
1059 | { | |
94e8cc35 | 1060 | struct gfar_private *priv = netdev_priv(dev); |
1da177e4 LT |
1061 | int err; |
1062 | ||
bea3348e SH |
1063 | napi_enable(&priv->napi); |
1064 | ||
1da177e4 LT |
1065 | /* Initialize a bunch of registers */ |
1066 | init_registers(dev); | |
1067 | ||
1068 | gfar_set_mac_address(dev); | |
1069 | ||
1070 | err = init_phy(dev); | |
1071 | ||
bea3348e SH |
1072 | if(err) { |
1073 | napi_disable(&priv->napi); | |
1da177e4 | 1074 | return err; |
bea3348e | 1075 | } |
1da177e4 LT |
1076 | |
1077 | err = startup_gfar(dev); | |
db0e8e3f | 1078 | if (err) { |
bea3348e | 1079 | napi_disable(&priv->napi); |
db0e8e3f AV |
1080 | return err; |
1081 | } | |
1da177e4 LT |
1082 | |
1083 | netif_start_queue(dev); | |
1084 | ||
1085 | return err; | |
1086 | } | |
1087 | ||
7f7f5316 | 1088 | static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb, struct txbd8 *bdp) |
0bbaf069 KG |
1089 | { |
1090 | struct txfcb *fcb = (struct txfcb *)skb_push (skb, GMAC_FCB_LEN); | |
1091 | ||
1092 | memset(fcb, 0, GMAC_FCB_LEN); | |
1093 | ||
0bbaf069 KG |
1094 | return fcb; |
1095 | } | |
1096 | ||
1097 | static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb) | |
1098 | { | |
7f7f5316 | 1099 | u8 flags = 0; |
0bbaf069 KG |
1100 | |
1101 | /* If we're here, it's a IP packet with a TCP or UDP | |
1102 | * payload. We set it to checksum, using a pseudo-header | |
1103 | * we provide | |
1104 | */ | |
7f7f5316 | 1105 | flags = TXFCB_DEFAULT; |
0bbaf069 | 1106 | |
7f7f5316 AF |
1107 | /* Tell the controller what the protocol is */ |
1108 | /* And provide the already calculated phcs */ | |
eddc9ec5 | 1109 | if (ip_hdr(skb)->protocol == IPPROTO_UDP) { |
7f7f5316 | 1110 | flags |= TXFCB_UDP; |
4bedb452 | 1111 | fcb->phcs = udp_hdr(skb)->check; |
7f7f5316 | 1112 | } else |
8da32de5 | 1113 | fcb->phcs = tcp_hdr(skb)->check; |
0bbaf069 KG |
1114 | |
1115 | /* l3os is the distance between the start of the | |
1116 | * frame (skb->data) and the start of the IP hdr. | |
1117 | * l4os is the distance between the start of the | |
1118 | * l3 hdr and the l4 hdr */ | |
bbe735e4 | 1119 | fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN); |
cfe1fc77 | 1120 | fcb->l4os = skb_network_header_len(skb); |
0bbaf069 | 1121 | |
7f7f5316 | 1122 | fcb->flags = flags; |
0bbaf069 KG |
1123 | } |
1124 | ||
7f7f5316 | 1125 | void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb) |
0bbaf069 | 1126 | { |
7f7f5316 | 1127 | fcb->flags |= TXFCB_VLN; |
0bbaf069 KG |
1128 | fcb->vlctl = vlan_tx_tag_get(skb); |
1129 | } | |
1130 | ||
1da177e4 LT |
1131 | /* This is called by the kernel when a frame is ready for transmission. */ |
1132 | /* It is pointed to by the dev->hard_start_xmit function pointer */ | |
1133 | static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1134 | { | |
1135 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 | 1136 | struct txfcb *fcb = NULL; |
1da177e4 | 1137 | struct txbd8 *txbdp; |
7f7f5316 | 1138 | u16 status; |
fef6108d | 1139 | unsigned long flags; |
1da177e4 LT |
1140 | |
1141 | /* Update transmit stats */ | |
09f75cd7 | 1142 | dev->stats.tx_bytes += skb->len; |
1da177e4 LT |
1143 | |
1144 | /* Lock priv now */ | |
fef6108d | 1145 | spin_lock_irqsave(&priv->txlock, flags); |
1da177e4 LT |
1146 | |
1147 | /* Point at the first free tx descriptor */ | |
1148 | txbdp = priv->cur_tx; | |
1149 | ||
1150 | /* Clear all but the WRAP status flags */ | |
7f7f5316 | 1151 | status = txbdp->status & TXBD_WRAP; |
1da177e4 | 1152 | |
0bbaf069 | 1153 | /* Set up checksumming */ |
7f7f5316 | 1154 | if (likely((dev->features & NETIF_F_IP_CSUM) |
84fa7933 | 1155 | && (CHECKSUM_PARTIAL == skb->ip_summed))) { |
0bbaf069 | 1156 | fcb = gfar_add_fcb(skb, txbdp); |
7f7f5316 | 1157 | status |= TXBD_TOE; |
0bbaf069 KG |
1158 | gfar_tx_checksum(skb, fcb); |
1159 | } | |
1160 | ||
1161 | if (priv->vlan_enable && | |
1162 | unlikely(priv->vlgrp && vlan_tx_tag_present(skb))) { | |
7f7f5316 | 1163 | if (unlikely(NULL == fcb)) { |
0bbaf069 | 1164 | fcb = gfar_add_fcb(skb, txbdp); |
7f7f5316 AF |
1165 | status |= TXBD_TOE; |
1166 | } | |
0bbaf069 KG |
1167 | |
1168 | gfar_tx_vlan(skb, fcb); | |
1169 | } | |
1170 | ||
1da177e4 LT |
1171 | /* Set buffer length and pointer */ |
1172 | txbdp->length = skb->len; | |
cf782298 | 1173 | txbdp->bufPtr = dma_map_single(&dev->dev, skb->data, |
1da177e4 LT |
1174 | skb->len, DMA_TO_DEVICE); |
1175 | ||
1176 | /* Save the skb pointer so we can free it later */ | |
1177 | priv->tx_skbuff[priv->skb_curtx] = skb; | |
1178 | ||
1179 | /* Update the current skb pointer (wrapping if this was the last) */ | |
1180 | priv->skb_curtx = | |
1181 | (priv->skb_curtx + 1) & TX_RING_MOD_MASK(priv->tx_ring_size); | |
1182 | ||
1183 | /* Flag the BD as interrupt-causing */ | |
7f7f5316 | 1184 | status |= TXBD_INTERRUPT; |
1da177e4 LT |
1185 | |
1186 | /* Flag the BD as ready to go, last in frame, and */ | |
1187 | /* in need of CRC */ | |
7f7f5316 | 1188 | status |= (TXBD_READY | TXBD_LAST | TXBD_CRC); |
1da177e4 LT |
1189 | |
1190 | dev->trans_start = jiffies; | |
1191 | ||
3b6330ce SW |
1192 | /* The powerpc-specific eieio() is used, as wmb() has too strong |
1193 | * semantics (it requires synchronization between cacheable and | |
1194 | * uncacheable mappings, which eieio doesn't provide and which we | |
1195 | * don't need), thus requiring a more expensive sync instruction. At | |
1196 | * some point, the set of architecture-independent barrier functions | |
1197 | * should be expanded to include weaker barriers. | |
1198 | */ | |
1199 | ||
1200 | eieio(); | |
7f7f5316 AF |
1201 | txbdp->status = status; |
1202 | ||
1da177e4 LT |
1203 | /* If this was the last BD in the ring, the next one */ |
1204 | /* is at the beginning of the ring */ | |
1205 | if (txbdp->status & TXBD_WRAP) | |
1206 | txbdp = priv->tx_bd_base; | |
1207 | else | |
1208 | txbdp++; | |
1209 | ||
1210 | /* If the next BD still needs to be cleaned up, then the bds | |
1211 | are full. We need to tell the kernel to stop sending us stuff. */ | |
1212 | if (txbdp == priv->dirty_tx) { | |
1213 | netif_stop_queue(dev); | |
1214 | ||
09f75cd7 | 1215 | dev->stats.tx_fifo_errors++; |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | /* Update the current txbd to the next one */ | |
1219 | priv->cur_tx = txbdp; | |
1220 | ||
1221 | /* Tell the DMA to go go go */ | |
1222 | gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); | |
1223 | ||
1224 | /* Unlock priv */ | |
fef6108d | 1225 | spin_unlock_irqrestore(&priv->txlock, flags); |
1da177e4 LT |
1226 | |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | /* Stops the kernel queue, and halts the controller */ | |
1231 | static int gfar_close(struct net_device *dev) | |
1232 | { | |
1233 | struct gfar_private *priv = netdev_priv(dev); | |
bea3348e SH |
1234 | |
1235 | napi_disable(&priv->napi); | |
1236 | ||
ab939905 | 1237 | cancel_work_sync(&priv->reset_task); |
1da177e4 LT |
1238 | stop_gfar(dev); |
1239 | ||
bb40dcbb AF |
1240 | /* Disconnect from the PHY */ |
1241 | phy_disconnect(priv->phydev); | |
1242 | priv->phydev = NULL; | |
1da177e4 LT |
1243 | |
1244 | netif_stop_queue(dev); | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
1da177e4 | 1249 | /* Changes the mac address if the controller is not running. */ |
f162b9d5 | 1250 | static int gfar_set_mac_address(struct net_device *dev) |
1da177e4 | 1251 | { |
7f7f5316 | 1252 | gfar_set_mac_for_addr(dev, 0, dev->dev_addr); |
1da177e4 LT |
1253 | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | ||
0bbaf069 KG |
1258 | /* Enables and disables VLAN insertion/extraction */ |
1259 | static void gfar_vlan_rx_register(struct net_device *dev, | |
1260 | struct vlan_group *grp) | |
1261 | { | |
1262 | struct gfar_private *priv = netdev_priv(dev); | |
1263 | unsigned long flags; | |
1264 | u32 tempval; | |
1265 | ||
fef6108d | 1266 | spin_lock_irqsave(&priv->rxlock, flags); |
0bbaf069 KG |
1267 | |
1268 | priv->vlgrp = grp; | |
1269 | ||
1270 | if (grp) { | |
1271 | /* Enable VLAN tag insertion */ | |
1272 | tempval = gfar_read(&priv->regs->tctrl); | |
1273 | tempval |= TCTRL_VLINS; | |
1274 | ||
1275 | gfar_write(&priv->regs->tctrl, tempval); | |
6aa20a22 | 1276 | |
0bbaf069 KG |
1277 | /* Enable VLAN tag extraction */ |
1278 | tempval = gfar_read(&priv->regs->rctrl); | |
1279 | tempval |= RCTRL_VLEX; | |
1280 | gfar_write(&priv->regs->rctrl, tempval); | |
1281 | } else { | |
1282 | /* Disable VLAN tag insertion */ | |
1283 | tempval = gfar_read(&priv->regs->tctrl); | |
1284 | tempval &= ~TCTRL_VLINS; | |
1285 | gfar_write(&priv->regs->tctrl, tempval); | |
1286 | ||
1287 | /* Disable VLAN tag extraction */ | |
1288 | tempval = gfar_read(&priv->regs->rctrl); | |
1289 | tempval &= ~RCTRL_VLEX; | |
1290 | gfar_write(&priv->regs->rctrl, tempval); | |
1291 | } | |
1292 | ||
fef6108d | 1293 | spin_unlock_irqrestore(&priv->rxlock, flags); |
0bbaf069 KG |
1294 | } |
1295 | ||
1da177e4 LT |
1296 | static int gfar_change_mtu(struct net_device *dev, int new_mtu) |
1297 | { | |
1298 | int tempsize, tempval; | |
1299 | struct gfar_private *priv = netdev_priv(dev); | |
1300 | int oldsize = priv->rx_buffer_size; | |
0bbaf069 KG |
1301 | int frame_size = new_mtu + ETH_HLEN; |
1302 | ||
1303 | if (priv->vlan_enable) | |
faa89577 | 1304 | frame_size += VLAN_HLEN; |
0bbaf069 KG |
1305 | |
1306 | if (gfar_uses_fcb(priv)) | |
1307 | frame_size += GMAC_FCB_LEN; | |
1308 | ||
1309 | frame_size += priv->padding; | |
1da177e4 LT |
1310 | |
1311 | if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) { | |
0bbaf069 KG |
1312 | if (netif_msg_drv(priv)) |
1313 | printk(KERN_ERR "%s: Invalid MTU setting\n", | |
1314 | dev->name); | |
1da177e4 LT |
1315 | return -EINVAL; |
1316 | } | |
1317 | ||
1318 | tempsize = | |
1319 | (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) + | |
1320 | INCREMENTAL_BUFFER_SIZE; | |
1321 | ||
1322 | /* Only stop and start the controller if it isn't already | |
7f7f5316 | 1323 | * stopped, and we changed something */ |
1da177e4 LT |
1324 | if ((oldsize != tempsize) && (dev->flags & IFF_UP)) |
1325 | stop_gfar(dev); | |
1326 | ||
1327 | priv->rx_buffer_size = tempsize; | |
1328 | ||
1329 | dev->mtu = new_mtu; | |
1330 | ||
1331 | gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); | |
1332 | gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size); | |
1333 | ||
1334 | /* If the mtu is larger than the max size for standard | |
1335 | * ethernet frames (ie, a jumbo frame), then set maccfg2 | |
1336 | * to allow huge frames, and to check the length */ | |
1337 | tempval = gfar_read(&priv->regs->maccfg2); | |
1338 | ||
1339 | if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE) | |
1340 | tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); | |
1341 | else | |
1342 | tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); | |
1343 | ||
1344 | gfar_write(&priv->regs->maccfg2, tempval); | |
1345 | ||
1346 | if ((oldsize != tempsize) && (dev->flags & IFF_UP)) | |
1347 | startup_gfar(dev); | |
1348 | ||
1349 | return 0; | |
1350 | } | |
1351 | ||
ab939905 | 1352 | /* gfar_reset_task gets scheduled when a packet has not been |
1da177e4 LT |
1353 | * transmitted after a set amount of time. |
1354 | * For now, assume that clearing out all the structures, and | |
ab939905 SS |
1355 | * starting over will fix the problem. |
1356 | */ | |
1357 | static void gfar_reset_task(struct work_struct *work) | |
1da177e4 | 1358 | { |
ab939905 SS |
1359 | struct gfar_private *priv = container_of(work, struct gfar_private, |
1360 | reset_task); | |
1361 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
1362 | |
1363 | if (dev->flags & IFF_UP) { | |
1364 | stop_gfar(dev); | |
1365 | startup_gfar(dev); | |
1366 | } | |
1367 | ||
263ba320 | 1368 | netif_tx_schedule_all(dev); |
1da177e4 LT |
1369 | } |
1370 | ||
ab939905 SS |
1371 | static void gfar_timeout(struct net_device *dev) |
1372 | { | |
1373 | struct gfar_private *priv = netdev_priv(dev); | |
1374 | ||
1375 | dev->stats.tx_errors++; | |
1376 | schedule_work(&priv->reset_task); | |
1377 | } | |
1378 | ||
1da177e4 | 1379 | /* Interrupt Handler for Transmit complete */ |
f162b9d5 | 1380 | static int gfar_clean_tx_ring(struct net_device *dev) |
1da177e4 | 1381 | { |
1da177e4 | 1382 | struct txbd8 *bdp; |
d080cd63 DH |
1383 | struct gfar_private *priv = netdev_priv(dev); |
1384 | int howmany = 0; | |
1da177e4 | 1385 | |
1da177e4 LT |
1386 | bdp = priv->dirty_tx; |
1387 | while ((bdp->status & TXBD_READY) == 0) { | |
1388 | /* If dirty_tx and cur_tx are the same, then either the */ | |
1389 | /* ring is empty or full now (it could only be full in the beginning, */ | |
1390 | /* obviously). If it is empty, we are done. */ | |
1391 | if ((bdp == priv->cur_tx) && (netif_queue_stopped(dev) == 0)) | |
1392 | break; | |
1393 | ||
d080cd63 | 1394 | howmany++; |
1da177e4 LT |
1395 | |
1396 | /* Deferred means some collisions occurred during transmit, */ | |
1397 | /* but we eventually sent the packet. */ | |
1398 | if (bdp->status & TXBD_DEF) | |
09f75cd7 | 1399 | dev->stats.collisions++; |
1da177e4 LT |
1400 | |
1401 | /* Free the sk buffer associated with this TxBD */ | |
1402 | dev_kfree_skb_irq(priv->tx_skbuff[priv->skb_dirtytx]); | |
d080cd63 | 1403 | |
1da177e4 LT |
1404 | priv->tx_skbuff[priv->skb_dirtytx] = NULL; |
1405 | priv->skb_dirtytx = | |
1406 | (priv->skb_dirtytx + | |
1407 | 1) & TX_RING_MOD_MASK(priv->tx_ring_size); | |
1408 | ||
d080cd63 DH |
1409 | /* Clean BD length for empty detection */ |
1410 | bdp->length = 0; | |
1411 | ||
1da177e4 LT |
1412 | /* update bdp to point at next bd in the ring (wrapping if necessary) */ |
1413 | if (bdp->status & TXBD_WRAP) | |
1414 | bdp = priv->tx_bd_base; | |
1415 | else | |
1416 | bdp++; | |
1417 | ||
1418 | /* Move dirty_tx to be the next bd */ | |
1419 | priv->dirty_tx = bdp; | |
1420 | ||
1421 | /* We freed a buffer, so now we can restart transmission */ | |
1422 | if (netif_queue_stopped(dev)) | |
1423 | netif_wake_queue(dev); | |
1424 | } /* while ((bdp->status & TXBD_READY) == 0) */ | |
1425 | ||
d080cd63 DH |
1426 | dev->stats.tx_packets += howmany; |
1427 | ||
1428 | return howmany; | |
1429 | } | |
1430 | ||
1431 | /* Interrupt Handler for Transmit complete */ | |
1432 | static irqreturn_t gfar_transmit(int irq, void *dev_id) | |
1433 | { | |
1434 | struct net_device *dev = (struct net_device *) dev_id; | |
1435 | struct gfar_private *priv = netdev_priv(dev); | |
1436 | ||
1437 | /* Clear IEVENT */ | |
1438 | gfar_write(&priv->regs->ievent, IEVENT_TX_MASK); | |
1439 | ||
1440 | /* Lock priv */ | |
1441 | spin_lock(&priv->txlock); | |
1442 | ||
1443 | gfar_clean_tx_ring(dev); | |
1444 | ||
1da177e4 LT |
1445 | /* If we are coalescing the interrupts, reset the timer */ |
1446 | /* Otherwise, clear it */ | |
2f448911 AF |
1447 | if (likely(priv->txcoalescing)) { |
1448 | gfar_write(&priv->regs->txic, 0); | |
1da177e4 LT |
1449 | gfar_write(&priv->regs->txic, |
1450 | mk_ic_value(priv->txcount, priv->txtime)); | |
2f448911 | 1451 | } |
1da177e4 | 1452 | |
fef6108d | 1453 | spin_unlock(&priv->txlock); |
1da177e4 LT |
1454 | |
1455 | return IRQ_HANDLED; | |
1456 | } | |
1457 | ||
815b97c6 AF |
1458 | static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp, |
1459 | struct sk_buff *skb) | |
1460 | { | |
1461 | struct gfar_private *priv = netdev_priv(dev); | |
1462 | u32 * status_len = (u32 *)bdp; | |
1463 | u16 flags; | |
1464 | ||
1465 | bdp->bufPtr = dma_map_single(&dev->dev, skb->data, | |
1466 | priv->rx_buffer_size, DMA_FROM_DEVICE); | |
1467 | ||
1468 | flags = RXBD_EMPTY | RXBD_INTERRUPT; | |
1469 | ||
1470 | if (bdp == priv->rx_bd_base + priv->rx_ring_size - 1) | |
1471 | flags |= RXBD_WRAP; | |
1472 | ||
1473 | eieio(); | |
1474 | ||
1475 | *status_len = (u32)flags << 16; | |
1476 | } | |
1477 | ||
1478 | ||
1479 | struct sk_buff * gfar_new_skb(struct net_device *dev) | |
1da177e4 | 1480 | { |
7f7f5316 | 1481 | unsigned int alignamount; |
1da177e4 LT |
1482 | struct gfar_private *priv = netdev_priv(dev); |
1483 | struct sk_buff *skb = NULL; | |
1da177e4 LT |
1484 | |
1485 | /* We have to allocate the skb, so keep trying till we succeed */ | |
815b97c6 | 1486 | skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT); |
1da177e4 | 1487 | |
815b97c6 | 1488 | if (!skb) |
1da177e4 LT |
1489 | return NULL; |
1490 | ||
7f7f5316 | 1491 | alignamount = RXBUF_ALIGNMENT - |
bea3348e | 1492 | (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)); |
7f7f5316 | 1493 | |
1da177e4 LT |
1494 | /* We need the data buffer to be aligned properly. We will reserve |
1495 | * as many bytes as needed to align the data properly | |
1496 | */ | |
7f7f5316 | 1497 | skb_reserve(skb, alignamount); |
1da177e4 | 1498 | |
1da177e4 LT |
1499 | return skb; |
1500 | } | |
1501 | ||
298e1a9e | 1502 | static inline void count_errors(unsigned short status, struct net_device *dev) |
1da177e4 | 1503 | { |
298e1a9e | 1504 | struct gfar_private *priv = netdev_priv(dev); |
09f75cd7 | 1505 | struct net_device_stats *stats = &dev->stats; |
1da177e4 LT |
1506 | struct gfar_extra_stats *estats = &priv->extra_stats; |
1507 | ||
1508 | /* If the packet was truncated, none of the other errors | |
1509 | * matter */ | |
1510 | if (status & RXBD_TRUNCATED) { | |
1511 | stats->rx_length_errors++; | |
1512 | ||
1513 | estats->rx_trunc++; | |
1514 | ||
1515 | return; | |
1516 | } | |
1517 | /* Count the errors, if there were any */ | |
1518 | if (status & (RXBD_LARGE | RXBD_SHORT)) { | |
1519 | stats->rx_length_errors++; | |
1520 | ||
1521 | if (status & RXBD_LARGE) | |
1522 | estats->rx_large++; | |
1523 | else | |
1524 | estats->rx_short++; | |
1525 | } | |
1526 | if (status & RXBD_NONOCTET) { | |
1527 | stats->rx_frame_errors++; | |
1528 | estats->rx_nonoctet++; | |
1529 | } | |
1530 | if (status & RXBD_CRCERR) { | |
1531 | estats->rx_crcerr++; | |
1532 | stats->rx_crc_errors++; | |
1533 | } | |
1534 | if (status & RXBD_OVERRUN) { | |
1535 | estats->rx_overrun++; | |
1536 | stats->rx_crc_errors++; | |
1537 | } | |
1538 | } | |
1539 | ||
7d12e780 | 1540 | irqreturn_t gfar_receive(int irq, void *dev_id) |
1da177e4 LT |
1541 | { |
1542 | struct net_device *dev = (struct net_device *) dev_id; | |
1543 | struct gfar_private *priv = netdev_priv(dev); | |
1da177e4 | 1544 | u32 tempval; |
1da177e4 | 1545 | |
1da177e4 | 1546 | /* support NAPI */ |
d080cd63 DH |
1547 | /* Clear IEVENT, so interrupts aren't called again |
1548 | * because of the packets that have already arrived */ | |
1549 | gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK); | |
1550 | ||
bea3348e | 1551 | if (netif_rx_schedule_prep(dev, &priv->napi)) { |
1da177e4 | 1552 | tempval = gfar_read(&priv->regs->imask); |
d080cd63 | 1553 | tempval &= IMASK_RTX_DISABLED; |
1da177e4 LT |
1554 | gfar_write(&priv->regs->imask, tempval); |
1555 | ||
bea3348e | 1556 | __netif_rx_schedule(dev, &priv->napi); |
1da177e4 | 1557 | } else { |
0bbaf069 KG |
1558 | if (netif_msg_rx_err(priv)) |
1559 | printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n", | |
1560 | dev->name, gfar_read(&priv->regs->ievent), | |
1561 | gfar_read(&priv->regs->imask)); | |
1da177e4 | 1562 | } |
1da177e4 LT |
1563 | |
1564 | return IRQ_HANDLED; | |
1565 | } | |
1566 | ||
0bbaf069 KG |
1567 | static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb) |
1568 | { | |
1569 | /* If valid headers were found, and valid sums | |
1570 | * were verified, then we tell the kernel that no | |
1571 | * checksumming is necessary. Otherwise, it is */ | |
7f7f5316 | 1572 | if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU)) |
0bbaf069 KG |
1573 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1574 | else | |
1575 | skb->ip_summed = CHECKSUM_NONE; | |
1576 | } | |
1577 | ||
1578 | ||
1579 | static inline struct rxfcb *gfar_get_fcb(struct sk_buff *skb) | |
1580 | { | |
1581 | struct rxfcb *fcb = (struct rxfcb *)skb->data; | |
1582 | ||
1583 | /* Remove the FCB from the skb */ | |
1584 | skb_pull(skb, GMAC_FCB_LEN); | |
1585 | ||
1586 | return fcb; | |
1587 | } | |
1da177e4 LT |
1588 | |
1589 | /* gfar_process_frame() -- handle one incoming packet if skb | |
1590 | * isn't NULL. */ | |
1591 | static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, | |
1592 | int length) | |
1593 | { | |
1594 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 | 1595 | struct rxfcb *fcb = NULL; |
1da177e4 | 1596 | |
bb40dcbb | 1597 | if (NULL == skb) { |
0bbaf069 KG |
1598 | if (netif_msg_rx_err(priv)) |
1599 | printk(KERN_WARNING "%s: Missing skb!!.\n", dev->name); | |
09f75cd7 | 1600 | dev->stats.rx_dropped++; |
1da177e4 LT |
1601 | priv->extra_stats.rx_skbmissing++; |
1602 | } else { | |
0bbaf069 KG |
1603 | int ret; |
1604 | ||
1da177e4 LT |
1605 | /* Prep the skb for the packet */ |
1606 | skb_put(skb, length); | |
1607 | ||
0bbaf069 KG |
1608 | /* Grab the FCB if there is one */ |
1609 | if (gfar_uses_fcb(priv)) | |
1610 | fcb = gfar_get_fcb(skb); | |
1611 | ||
1612 | /* Remove the padded bytes, if there are any */ | |
1613 | if (priv->padding) | |
1614 | skb_pull(skb, priv->padding); | |
1615 | ||
1616 | if (priv->rx_csum_enable) | |
1617 | gfar_rx_checksum(skb, fcb); | |
1618 | ||
1da177e4 LT |
1619 | /* Tell the skb what kind of packet this is */ |
1620 | skb->protocol = eth_type_trans(skb, dev); | |
1621 | ||
1622 | /* Send the packet up the stack */ | |
0aa1538f FR |
1623 | if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN))) { |
1624 | ret = vlan_hwaccel_receive_skb(skb, priv->vlgrp, | |
1625 | fcb->vlctl); | |
1626 | } else | |
1627 | ret = netif_receive_skb(skb); | |
0bbaf069 KG |
1628 | |
1629 | if (NET_RX_DROP == ret) | |
1da177e4 | 1630 | priv->extra_stats.kernel_dropped++; |
1da177e4 LT |
1631 | } |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | ||
1636 | /* gfar_clean_rx_ring() -- Processes each frame in the rx ring | |
0bbaf069 | 1637 | * until the budget/quota has been reached. Returns the number |
1da177e4 LT |
1638 | * of frames handled |
1639 | */ | |
0bbaf069 | 1640 | int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit) |
1da177e4 LT |
1641 | { |
1642 | struct rxbd8 *bdp; | |
1643 | struct sk_buff *skb; | |
1644 | u16 pkt_len; | |
1645 | int howmany = 0; | |
1646 | struct gfar_private *priv = netdev_priv(dev); | |
1647 | ||
1648 | /* Get the first full descriptor */ | |
1649 | bdp = priv->cur_rx; | |
1650 | ||
1651 | while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) { | |
815b97c6 | 1652 | struct sk_buff *newskb; |
3b6330ce | 1653 | rmb(); |
815b97c6 AF |
1654 | |
1655 | /* Add another skb for the future */ | |
1656 | newskb = gfar_new_skb(dev); | |
1657 | ||
1da177e4 LT |
1658 | skb = priv->rx_skbuff[priv->skb_currx]; |
1659 | ||
815b97c6 AF |
1660 | /* We drop the frame if we failed to allocate a new buffer */ |
1661 | if (unlikely(!newskb || !(bdp->status & RXBD_LAST) || | |
1662 | bdp->status & RXBD_ERR)) { | |
1663 | count_errors(bdp->status, dev); | |
1664 | ||
1665 | if (unlikely(!newskb)) | |
1666 | newskb = skb; | |
1667 | ||
1668 | if (skb) { | |
1669 | dma_unmap_single(&priv->dev->dev, | |
1670 | bdp->bufPtr, | |
1671 | priv->rx_buffer_size, | |
1672 | DMA_FROM_DEVICE); | |
1673 | ||
1674 | dev_kfree_skb_any(skb); | |
1675 | } | |
1676 | } else { | |
1da177e4 | 1677 | /* Increment the number of packets */ |
09f75cd7 | 1678 | dev->stats.rx_packets++; |
1da177e4 LT |
1679 | howmany++; |
1680 | ||
1681 | /* Remove the FCS from the packet length */ | |
1682 | pkt_len = bdp->length - 4; | |
1683 | ||
1684 | gfar_process_frame(dev, skb, pkt_len); | |
1685 | ||
09f75cd7 | 1686 | dev->stats.rx_bytes += pkt_len; |
1da177e4 LT |
1687 | } |
1688 | ||
1689 | dev->last_rx = jiffies; | |
1690 | ||
815b97c6 | 1691 | priv->rx_skbuff[priv->skb_currx] = newskb; |
1da177e4 | 1692 | |
815b97c6 AF |
1693 | /* Setup the new bdp */ |
1694 | gfar_new_rxbdp(dev, bdp, newskb); | |
1da177e4 LT |
1695 | |
1696 | /* Update to the next pointer */ | |
1697 | if (bdp->status & RXBD_WRAP) | |
1698 | bdp = priv->rx_bd_base; | |
1699 | else | |
1700 | bdp++; | |
1701 | ||
1702 | /* update to point at the next skb */ | |
1703 | priv->skb_currx = | |
815b97c6 AF |
1704 | (priv->skb_currx + 1) & |
1705 | RX_RING_MOD_MASK(priv->rx_ring_size); | |
1da177e4 LT |
1706 | } |
1707 | ||
1708 | /* Update the current rxbd pointer to be the next one */ | |
1709 | priv->cur_rx = bdp; | |
1710 | ||
1da177e4 LT |
1711 | return howmany; |
1712 | } | |
1713 | ||
bea3348e | 1714 | static int gfar_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1715 | { |
bea3348e SH |
1716 | struct gfar_private *priv = container_of(napi, struct gfar_private, napi); |
1717 | struct net_device *dev = priv->dev; | |
1da177e4 | 1718 | int howmany; |
d080cd63 DH |
1719 | unsigned long flags; |
1720 | ||
1721 | /* If we fail to get the lock, don't bother with the TX BDs */ | |
1722 | if (spin_trylock_irqsave(&priv->txlock, flags)) { | |
1723 | gfar_clean_tx_ring(dev); | |
1724 | spin_unlock_irqrestore(&priv->txlock, flags); | |
1725 | } | |
1da177e4 | 1726 | |
bea3348e | 1727 | howmany = gfar_clean_rx_ring(dev, budget); |
1da177e4 | 1728 | |
bea3348e SH |
1729 | if (howmany < budget) { |
1730 | netif_rx_complete(dev, napi); | |
1da177e4 LT |
1731 | |
1732 | /* Clear the halt bit in RSTAT */ | |
1733 | gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT); | |
1734 | ||
1735 | gfar_write(&priv->regs->imask, IMASK_DEFAULT); | |
1736 | ||
1737 | /* If we are coalescing interrupts, update the timer */ | |
1738 | /* Otherwise, clear it */ | |
2f448911 AF |
1739 | if (likely(priv->rxcoalescing)) { |
1740 | gfar_write(&priv->regs->rxic, 0); | |
1da177e4 LT |
1741 | gfar_write(&priv->regs->rxic, |
1742 | mk_ic_value(priv->rxcount, priv->rxtime)); | |
2f448911 | 1743 | } |
1da177e4 LT |
1744 | } |
1745 | ||
bea3348e | 1746 | return howmany; |
1da177e4 | 1747 | } |
1da177e4 | 1748 | |
f2d71c2d VW |
1749 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1750 | /* | |
1751 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
1752 | * without having to re-enable interrupts. It's not called while | |
1753 | * the interrupt routine is executing. | |
1754 | */ | |
1755 | static void gfar_netpoll(struct net_device *dev) | |
1756 | { | |
1757 | struct gfar_private *priv = netdev_priv(dev); | |
1758 | ||
1759 | /* If the device has multiple interrupts, run tx/rx */ | |
1760 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
1761 | disable_irq(priv->interruptTransmit); | |
1762 | disable_irq(priv->interruptReceive); | |
1763 | disable_irq(priv->interruptError); | |
1764 | gfar_interrupt(priv->interruptTransmit, dev); | |
1765 | enable_irq(priv->interruptError); | |
1766 | enable_irq(priv->interruptReceive); | |
1767 | enable_irq(priv->interruptTransmit); | |
1768 | } else { | |
1769 | disable_irq(priv->interruptTransmit); | |
1770 | gfar_interrupt(priv->interruptTransmit, dev); | |
1771 | enable_irq(priv->interruptTransmit); | |
1772 | } | |
1773 | } | |
1774 | #endif | |
1775 | ||
1da177e4 | 1776 | /* The interrupt handler for devices with one interrupt */ |
7d12e780 | 1777 | static irqreturn_t gfar_interrupt(int irq, void *dev_id) |
1da177e4 LT |
1778 | { |
1779 | struct net_device *dev = dev_id; | |
1780 | struct gfar_private *priv = netdev_priv(dev); | |
1781 | ||
1782 | /* Save ievent for future reference */ | |
1783 | u32 events = gfar_read(&priv->regs->ievent); | |
1784 | ||
1da177e4 | 1785 | /* Check for reception */ |
538cc7ee | 1786 | if (events & IEVENT_RX_MASK) |
7d12e780 | 1787 | gfar_receive(irq, dev_id); |
1da177e4 LT |
1788 | |
1789 | /* Check for transmit completion */ | |
538cc7ee | 1790 | if (events & IEVENT_TX_MASK) |
7d12e780 | 1791 | gfar_transmit(irq, dev_id); |
1da177e4 | 1792 | |
538cc7ee SS |
1793 | /* Check for errors */ |
1794 | if (events & IEVENT_ERR_MASK) | |
1795 | gfar_error(irq, dev_id); | |
1da177e4 LT |
1796 | |
1797 | return IRQ_HANDLED; | |
1798 | } | |
1799 | ||
1da177e4 LT |
1800 | /* Called every time the controller might need to be made |
1801 | * aware of new link state. The PHY code conveys this | |
bb40dcbb | 1802 | * information through variables in the phydev structure, and this |
1da177e4 LT |
1803 | * function converts those variables into the appropriate |
1804 | * register values, and can bring down the device if needed. | |
1805 | */ | |
1806 | static void adjust_link(struct net_device *dev) | |
1807 | { | |
1808 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 1809 | struct gfar __iomem *regs = priv->regs; |
bb40dcbb AF |
1810 | unsigned long flags; |
1811 | struct phy_device *phydev = priv->phydev; | |
1812 | int new_state = 0; | |
1813 | ||
fef6108d | 1814 | spin_lock_irqsave(&priv->txlock, flags); |
bb40dcbb AF |
1815 | if (phydev->link) { |
1816 | u32 tempval = gfar_read(®s->maccfg2); | |
7f7f5316 | 1817 | u32 ecntrl = gfar_read(®s->ecntrl); |
1da177e4 | 1818 | |
1da177e4 LT |
1819 | /* Now we make sure that we can be in full duplex mode. |
1820 | * If not, we operate in half-duplex mode. */ | |
bb40dcbb AF |
1821 | if (phydev->duplex != priv->oldduplex) { |
1822 | new_state = 1; | |
1823 | if (!(phydev->duplex)) | |
1da177e4 | 1824 | tempval &= ~(MACCFG2_FULL_DUPLEX); |
bb40dcbb | 1825 | else |
1da177e4 | 1826 | tempval |= MACCFG2_FULL_DUPLEX; |
1da177e4 | 1827 | |
bb40dcbb | 1828 | priv->oldduplex = phydev->duplex; |
1da177e4 LT |
1829 | } |
1830 | ||
bb40dcbb AF |
1831 | if (phydev->speed != priv->oldspeed) { |
1832 | new_state = 1; | |
1833 | switch (phydev->speed) { | |
1da177e4 | 1834 | case 1000: |
1da177e4 LT |
1835 | tempval = |
1836 | ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII); | |
1da177e4 LT |
1837 | break; |
1838 | case 100: | |
1839 | case 10: | |
1da177e4 LT |
1840 | tempval = |
1841 | ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII); | |
7f7f5316 AF |
1842 | |
1843 | /* Reduced mode distinguishes | |
1844 | * between 10 and 100 */ | |
1845 | if (phydev->speed == SPEED_100) | |
1846 | ecntrl |= ECNTRL_R100; | |
1847 | else | |
1848 | ecntrl &= ~(ECNTRL_R100); | |
1da177e4 LT |
1849 | break; |
1850 | default: | |
0bbaf069 KG |
1851 | if (netif_msg_link(priv)) |
1852 | printk(KERN_WARNING | |
bb40dcbb AF |
1853 | "%s: Ack! Speed (%d) is not 10/100/1000!\n", |
1854 | dev->name, phydev->speed); | |
1da177e4 LT |
1855 | break; |
1856 | } | |
1857 | ||
bb40dcbb | 1858 | priv->oldspeed = phydev->speed; |
1da177e4 LT |
1859 | } |
1860 | ||
bb40dcbb | 1861 | gfar_write(®s->maccfg2, tempval); |
7f7f5316 | 1862 | gfar_write(®s->ecntrl, ecntrl); |
bb40dcbb | 1863 | |
1da177e4 | 1864 | if (!priv->oldlink) { |
bb40dcbb | 1865 | new_state = 1; |
1da177e4 | 1866 | priv->oldlink = 1; |
1da177e4 | 1867 | } |
bb40dcbb AF |
1868 | } else if (priv->oldlink) { |
1869 | new_state = 1; | |
1870 | priv->oldlink = 0; | |
1871 | priv->oldspeed = 0; | |
1872 | priv->oldduplex = -1; | |
1da177e4 | 1873 | } |
1da177e4 | 1874 | |
bb40dcbb AF |
1875 | if (new_state && netif_msg_link(priv)) |
1876 | phy_print_status(phydev); | |
1877 | ||
fef6108d | 1878 | spin_unlock_irqrestore(&priv->txlock, flags); |
bb40dcbb | 1879 | } |
1da177e4 LT |
1880 | |
1881 | /* Update the hash table based on the current list of multicast | |
1882 | * addresses we subscribe to. Also, change the promiscuity of | |
1883 | * the device based on the flags (this function is called | |
1884 | * whenever dev->flags is changed */ | |
1885 | static void gfar_set_multi(struct net_device *dev) | |
1886 | { | |
1887 | struct dev_mc_list *mc_ptr; | |
1888 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 1889 | struct gfar __iomem *regs = priv->regs; |
1da177e4 LT |
1890 | u32 tempval; |
1891 | ||
1892 | if(dev->flags & IFF_PROMISC) { | |
1da177e4 LT |
1893 | /* Set RCTRL to PROM */ |
1894 | tempval = gfar_read(®s->rctrl); | |
1895 | tempval |= RCTRL_PROM; | |
1896 | gfar_write(®s->rctrl, tempval); | |
1897 | } else { | |
1898 | /* Set RCTRL to not PROM */ | |
1899 | tempval = gfar_read(®s->rctrl); | |
1900 | tempval &= ~(RCTRL_PROM); | |
1901 | gfar_write(®s->rctrl, tempval); | |
1902 | } | |
6aa20a22 | 1903 | |
1da177e4 LT |
1904 | if(dev->flags & IFF_ALLMULTI) { |
1905 | /* Set the hash to rx all multicast frames */ | |
0bbaf069 KG |
1906 | gfar_write(®s->igaddr0, 0xffffffff); |
1907 | gfar_write(®s->igaddr1, 0xffffffff); | |
1908 | gfar_write(®s->igaddr2, 0xffffffff); | |
1909 | gfar_write(®s->igaddr3, 0xffffffff); | |
1910 | gfar_write(®s->igaddr4, 0xffffffff); | |
1911 | gfar_write(®s->igaddr5, 0xffffffff); | |
1912 | gfar_write(®s->igaddr6, 0xffffffff); | |
1913 | gfar_write(®s->igaddr7, 0xffffffff); | |
1da177e4 LT |
1914 | gfar_write(®s->gaddr0, 0xffffffff); |
1915 | gfar_write(®s->gaddr1, 0xffffffff); | |
1916 | gfar_write(®s->gaddr2, 0xffffffff); | |
1917 | gfar_write(®s->gaddr3, 0xffffffff); | |
1918 | gfar_write(®s->gaddr4, 0xffffffff); | |
1919 | gfar_write(®s->gaddr5, 0xffffffff); | |
1920 | gfar_write(®s->gaddr6, 0xffffffff); | |
1921 | gfar_write(®s->gaddr7, 0xffffffff); | |
1922 | } else { | |
7f7f5316 AF |
1923 | int em_num; |
1924 | int idx; | |
1925 | ||
1da177e4 | 1926 | /* zero out the hash */ |
0bbaf069 KG |
1927 | gfar_write(®s->igaddr0, 0x0); |
1928 | gfar_write(®s->igaddr1, 0x0); | |
1929 | gfar_write(®s->igaddr2, 0x0); | |
1930 | gfar_write(®s->igaddr3, 0x0); | |
1931 | gfar_write(®s->igaddr4, 0x0); | |
1932 | gfar_write(®s->igaddr5, 0x0); | |
1933 | gfar_write(®s->igaddr6, 0x0); | |
1934 | gfar_write(®s->igaddr7, 0x0); | |
1da177e4 LT |
1935 | gfar_write(®s->gaddr0, 0x0); |
1936 | gfar_write(®s->gaddr1, 0x0); | |
1937 | gfar_write(®s->gaddr2, 0x0); | |
1938 | gfar_write(®s->gaddr3, 0x0); | |
1939 | gfar_write(®s->gaddr4, 0x0); | |
1940 | gfar_write(®s->gaddr5, 0x0); | |
1941 | gfar_write(®s->gaddr6, 0x0); | |
1942 | gfar_write(®s->gaddr7, 0x0); | |
1943 | ||
7f7f5316 AF |
1944 | /* If we have extended hash tables, we need to |
1945 | * clear the exact match registers to prepare for | |
1946 | * setting them */ | |
1947 | if (priv->extended_hash) { | |
1948 | em_num = GFAR_EM_NUM + 1; | |
1949 | gfar_clear_exact_match(dev); | |
1950 | idx = 1; | |
1951 | } else { | |
1952 | idx = 0; | |
1953 | em_num = 0; | |
1954 | } | |
1955 | ||
1da177e4 LT |
1956 | if(dev->mc_count == 0) |
1957 | return; | |
1958 | ||
1959 | /* Parse the list, and set the appropriate bits */ | |
1960 | for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) { | |
7f7f5316 AF |
1961 | if (idx < em_num) { |
1962 | gfar_set_mac_for_addr(dev, idx, | |
1963 | mc_ptr->dmi_addr); | |
1964 | idx++; | |
1965 | } else | |
1966 | gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr); | |
1da177e4 LT |
1967 | } |
1968 | } | |
1969 | ||
1970 | return; | |
1971 | } | |
1972 | ||
7f7f5316 AF |
1973 | |
1974 | /* Clears each of the exact match registers to zero, so they | |
1975 | * don't interfere with normal reception */ | |
1976 | static void gfar_clear_exact_match(struct net_device *dev) | |
1977 | { | |
1978 | int idx; | |
1979 | u8 zero_arr[MAC_ADDR_LEN] = {0,0,0,0,0,0}; | |
1980 | ||
1981 | for(idx = 1;idx < GFAR_EM_NUM + 1;idx++) | |
1982 | gfar_set_mac_for_addr(dev, idx, (u8 *)zero_arr); | |
1983 | } | |
1984 | ||
1da177e4 LT |
1985 | /* Set the appropriate hash bit for the given addr */ |
1986 | /* The algorithm works like so: | |
1987 | * 1) Take the Destination Address (ie the multicast address), and | |
1988 | * do a CRC on it (little endian), and reverse the bits of the | |
1989 | * result. | |
1990 | * 2) Use the 8 most significant bits as a hash into a 256-entry | |
1991 | * table. The table is controlled through 8 32-bit registers: | |
1992 | * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is | |
1993 | * gaddr7. This means that the 3 most significant bits in the | |
1994 | * hash index which gaddr register to use, and the 5 other bits | |
1995 | * indicate which bit (assuming an IBM numbering scheme, which | |
1996 | * for PowerPC (tm) is usually the case) in the register holds | |
1997 | * the entry. */ | |
1998 | static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr) | |
1999 | { | |
2000 | u32 tempval; | |
2001 | struct gfar_private *priv = netdev_priv(dev); | |
1da177e4 | 2002 | u32 result = ether_crc(MAC_ADDR_LEN, addr); |
0bbaf069 KG |
2003 | int width = priv->hash_width; |
2004 | u8 whichbit = (result >> (32 - width)) & 0x1f; | |
2005 | u8 whichreg = result >> (32 - width + 5); | |
1da177e4 LT |
2006 | u32 value = (1 << (31-whichbit)); |
2007 | ||
0bbaf069 | 2008 | tempval = gfar_read(priv->hash_regs[whichreg]); |
1da177e4 | 2009 | tempval |= value; |
0bbaf069 | 2010 | gfar_write(priv->hash_regs[whichreg], tempval); |
1da177e4 LT |
2011 | |
2012 | return; | |
2013 | } | |
2014 | ||
7f7f5316 AF |
2015 | |
2016 | /* There are multiple MAC Address register pairs on some controllers | |
2017 | * This function sets the numth pair to a given address | |
2018 | */ | |
2019 | static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr) | |
2020 | { | |
2021 | struct gfar_private *priv = netdev_priv(dev); | |
2022 | int idx; | |
2023 | char tmpbuf[MAC_ADDR_LEN]; | |
2024 | u32 tempval; | |
cc8c6e37 | 2025 | u32 __iomem *macptr = &priv->regs->macstnaddr1; |
7f7f5316 AF |
2026 | |
2027 | macptr += num*2; | |
2028 | ||
2029 | /* Now copy it into the mac registers backwards, cuz */ | |
2030 | /* little endian is silly */ | |
2031 | for (idx = 0; idx < MAC_ADDR_LEN; idx++) | |
2032 | tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx]; | |
2033 | ||
2034 | gfar_write(macptr, *((u32 *) (tmpbuf))); | |
2035 | ||
2036 | tempval = *((u32 *) (tmpbuf + 4)); | |
2037 | ||
2038 | gfar_write(macptr+1, tempval); | |
2039 | } | |
2040 | ||
1da177e4 | 2041 | /* GFAR error interrupt handler */ |
7d12e780 | 2042 | static irqreturn_t gfar_error(int irq, void *dev_id) |
1da177e4 LT |
2043 | { |
2044 | struct net_device *dev = dev_id; | |
2045 | struct gfar_private *priv = netdev_priv(dev); | |
2046 | ||
2047 | /* Save ievent for future reference */ | |
2048 | u32 events = gfar_read(&priv->regs->ievent); | |
2049 | ||
2050 | /* Clear IEVENT */ | |
d87eb127 SW |
2051 | gfar_write(&priv->regs->ievent, events & IEVENT_ERR_MASK); |
2052 | ||
2053 | /* Magic Packet is not an error. */ | |
2054 | if ((priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) && | |
2055 | (events & IEVENT_MAG)) | |
2056 | events &= ~IEVENT_MAG; | |
1da177e4 LT |
2057 | |
2058 | /* Hmm... */ | |
0bbaf069 KG |
2059 | if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv)) |
2060 | printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n", | |
538cc7ee | 2061 | dev->name, events, gfar_read(&priv->regs->imask)); |
1da177e4 LT |
2062 | |
2063 | /* Update the error counters */ | |
2064 | if (events & IEVENT_TXE) { | |
09f75cd7 | 2065 | dev->stats.tx_errors++; |
1da177e4 LT |
2066 | |
2067 | if (events & IEVENT_LC) | |
09f75cd7 | 2068 | dev->stats.tx_window_errors++; |
1da177e4 | 2069 | if (events & IEVENT_CRL) |
09f75cd7 | 2070 | dev->stats.tx_aborted_errors++; |
1da177e4 | 2071 | if (events & IEVENT_XFUN) { |
0bbaf069 | 2072 | if (netif_msg_tx_err(priv)) |
538cc7ee SS |
2073 | printk(KERN_DEBUG "%s: TX FIFO underrun, " |
2074 | "packet dropped.\n", dev->name); | |
09f75cd7 | 2075 | dev->stats.tx_dropped++; |
1da177e4 LT |
2076 | priv->extra_stats.tx_underrun++; |
2077 | ||
2078 | /* Reactivate the Tx Queues */ | |
2079 | gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); | |
2080 | } | |
0bbaf069 KG |
2081 | if (netif_msg_tx_err(priv)) |
2082 | printk(KERN_DEBUG "%s: Transmit Error\n", dev->name); | |
1da177e4 LT |
2083 | } |
2084 | if (events & IEVENT_BSY) { | |
09f75cd7 | 2085 | dev->stats.rx_errors++; |
1da177e4 LT |
2086 | priv->extra_stats.rx_bsy++; |
2087 | ||
7d12e780 | 2088 | gfar_receive(irq, dev_id); |
1da177e4 | 2089 | |
0bbaf069 | 2090 | if (netif_msg_rx_err(priv)) |
538cc7ee SS |
2091 | printk(KERN_DEBUG "%s: busy error (rstat: %x)\n", |
2092 | dev->name, gfar_read(&priv->regs->rstat)); | |
1da177e4 LT |
2093 | } |
2094 | if (events & IEVENT_BABR) { | |
09f75cd7 | 2095 | dev->stats.rx_errors++; |
1da177e4 LT |
2096 | priv->extra_stats.rx_babr++; |
2097 | ||
0bbaf069 | 2098 | if (netif_msg_rx_err(priv)) |
538cc7ee | 2099 | printk(KERN_DEBUG "%s: babbling RX error\n", dev->name); |
1da177e4 LT |
2100 | } |
2101 | if (events & IEVENT_EBERR) { | |
2102 | priv->extra_stats.eberr++; | |
0bbaf069 | 2103 | if (netif_msg_rx_err(priv)) |
538cc7ee | 2104 | printk(KERN_DEBUG "%s: bus error\n", dev->name); |
1da177e4 | 2105 | } |
0bbaf069 | 2106 | if ((events & IEVENT_RXC) && netif_msg_rx_status(priv)) |
538cc7ee | 2107 | printk(KERN_DEBUG "%s: control frame\n", dev->name); |
1da177e4 LT |
2108 | |
2109 | if (events & IEVENT_BABT) { | |
2110 | priv->extra_stats.tx_babt++; | |
0bbaf069 | 2111 | if (netif_msg_tx_err(priv)) |
538cc7ee | 2112 | printk(KERN_DEBUG "%s: babbling TX error\n", dev->name); |
1da177e4 LT |
2113 | } |
2114 | return IRQ_HANDLED; | |
2115 | } | |
2116 | ||
72abb461 KS |
2117 | /* work with hotplug and coldplug */ |
2118 | MODULE_ALIAS("platform:fsl-gianfar"); | |
2119 | ||
1da177e4 | 2120 | /* Structure for a device driver */ |
3ae5eaec | 2121 | static struct platform_driver gfar_driver = { |
1da177e4 LT |
2122 | .probe = gfar_probe, |
2123 | .remove = gfar_remove, | |
d87eb127 SW |
2124 | .suspend = gfar_suspend, |
2125 | .resume = gfar_resume, | |
3ae5eaec RK |
2126 | .driver = { |
2127 | .name = "fsl-gianfar", | |
72abb461 | 2128 | .owner = THIS_MODULE, |
3ae5eaec | 2129 | }, |
1da177e4 LT |
2130 | }; |
2131 | ||
2132 | static int __init gfar_init(void) | |
2133 | { | |
bb40dcbb AF |
2134 | int err = gfar_mdio_init(); |
2135 | ||
2136 | if (err) | |
2137 | return err; | |
2138 | ||
3ae5eaec | 2139 | err = platform_driver_register(&gfar_driver); |
bb40dcbb AF |
2140 | |
2141 | if (err) | |
2142 | gfar_mdio_exit(); | |
6aa20a22 | 2143 | |
bb40dcbb | 2144 | return err; |
1da177e4 LT |
2145 | } |
2146 | ||
2147 | static void __exit gfar_exit(void) | |
2148 | { | |
3ae5eaec | 2149 | platform_driver_unregister(&gfar_driver); |
bb40dcbb | 2150 | gfar_mdio_exit(); |
1da177e4 LT |
2151 | } |
2152 | ||
2153 | module_init(gfar_init); | |
2154 | module_exit(gfar_exit); | |
2155 |