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 | * |
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 LT |
46 | * interrupt handler will signal there is work to be done, and |
47 | * exit. Without NAPI, the packet(s) will be handled | |
48 | * immediately. Both methods will start at the last known empty | |
0bbaf069 | 49 | * descriptor, and process every subsequent descriptor until there |
1da177e4 LT |
50 | * are none left with data (NAPI will stop after a set number of |
51 | * packets to give time to other tasks, but will eventually | |
52 | * process all the packets). The data arrives inside a | |
53 | * pre-allocated skb, and so after the skb is passed up to the | |
54 | * stack, a new skb must be allocated, and the address field in | |
55 | * the buffer descriptor must be updated to indicate this new | |
56 | * skb. | |
57 | * | |
58 | * When the kernel requests that a packet be transmitted, the | |
59 | * driver starts where it left off last time, and points the | |
60 | * descriptor at the buffer which was passed in. The driver | |
61 | * then informs the DMA engine that there are packets ready to | |
62 | * be transmitted. Once the controller is finished transmitting | |
63 | * the packet, an interrupt may be triggered (under the same | |
64 | * conditions as for reception, but depending on the TXF bit). | |
65 | * The driver then cleans up the buffer. | |
66 | */ | |
67 | ||
1da177e4 | 68 | #include <linux/kernel.h> |
1da177e4 LT |
69 | #include <linux/string.h> |
70 | #include <linux/errno.h> | |
bb40dcbb | 71 | #include <linux/unistd.h> |
1da177e4 LT |
72 | #include <linux/slab.h> |
73 | #include <linux/interrupt.h> | |
74 | #include <linux/init.h> | |
75 | #include <linux/delay.h> | |
76 | #include <linux/netdevice.h> | |
77 | #include <linux/etherdevice.h> | |
78 | #include <linux/skbuff.h> | |
0bbaf069 | 79 | #include <linux/if_vlan.h> |
1da177e4 LT |
80 | #include <linux/spinlock.h> |
81 | #include <linux/mm.h> | |
d052d1be | 82 | #include <linux/platform_device.h> |
0bbaf069 KG |
83 | #include <linux/ip.h> |
84 | #include <linux/tcp.h> | |
85 | #include <linux/udp.h> | |
9c07b884 | 86 | #include <linux/in.h> |
1da177e4 LT |
87 | |
88 | #include <asm/io.h> | |
89 | #include <asm/irq.h> | |
90 | #include <asm/uaccess.h> | |
91 | #include <linux/module.h> | |
1da177e4 LT |
92 | #include <linux/dma-mapping.h> |
93 | #include <linux/crc32.h> | |
bb40dcbb AF |
94 | #include <linux/mii.h> |
95 | #include <linux/phy.h> | |
1da177e4 LT |
96 | |
97 | #include "gianfar.h" | |
bb40dcbb | 98 | #include "gianfar_mii.h" |
1da177e4 LT |
99 | |
100 | #define TX_TIMEOUT (1*HZ) | |
101 | #define SKB_ALLOC_TIMEOUT 1000000 | |
102 | #undef BRIEF_GFAR_ERRORS | |
103 | #undef VERBOSE_GFAR_ERRORS | |
104 | ||
105 | #ifdef CONFIG_GFAR_NAPI | |
106 | #define RECEIVE(x) netif_receive_skb(x) | |
107 | #else | |
108 | #define RECEIVE(x) netif_rx(x) | |
109 | #endif | |
110 | ||
111 | const char gfar_driver_name[] = "Gianfar Ethernet"; | |
7f7f5316 | 112 | const char gfar_driver_version[] = "1.3"; |
1da177e4 | 113 | |
1da177e4 LT |
114 | static int gfar_enet_open(struct net_device *dev); |
115 | static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
116 | static void gfar_timeout(struct net_device *dev); | |
117 | static int gfar_close(struct net_device *dev); | |
118 | struct sk_buff *gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp); | |
1da177e4 LT |
119 | static int gfar_set_mac_address(struct net_device *dev); |
120 | static int gfar_change_mtu(struct net_device *dev, int new_mtu); | |
7d12e780 DH |
121 | static irqreturn_t gfar_error(int irq, void *dev_id); |
122 | static irqreturn_t gfar_transmit(int irq, void *dev_id); | |
123 | static irqreturn_t gfar_interrupt(int irq, void *dev_id); | |
1da177e4 LT |
124 | static void adjust_link(struct net_device *dev); |
125 | static void init_registers(struct net_device *dev); | |
126 | static int init_phy(struct net_device *dev); | |
3ae5eaec RK |
127 | static int gfar_probe(struct platform_device *pdev); |
128 | static int gfar_remove(struct platform_device *pdev); | |
bb40dcbb | 129 | static void free_skb_resources(struct gfar_private *priv); |
1da177e4 LT |
130 | static void gfar_set_multi(struct net_device *dev); |
131 | static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr); | |
d3c12873 | 132 | static void gfar_configure_serdes(struct net_device *dev); |
fdb26629 AV |
133 | extern int gfar_local_mdio_write(struct gfar_mii __iomem *regs, int mii_id, int regnum, u16 value); |
134 | extern int gfar_local_mdio_read(struct gfar_mii __iomem *regs, int mii_id, int regnum); | |
1da177e4 | 135 | #ifdef CONFIG_GFAR_NAPI |
bea3348e | 136 | static int gfar_poll(struct napi_struct *napi, int budget); |
1da177e4 | 137 | #endif |
f2d71c2d VW |
138 | #ifdef CONFIG_NET_POLL_CONTROLLER |
139 | static void gfar_netpoll(struct net_device *dev); | |
140 | #endif | |
0bbaf069 | 141 | int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit); |
1da177e4 | 142 | static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length); |
0bbaf069 KG |
143 | static void gfar_vlan_rx_register(struct net_device *netdev, |
144 | struct vlan_group *grp); | |
7f7f5316 AF |
145 | void gfar_halt(struct net_device *dev); |
146 | void gfar_start(struct net_device *dev); | |
147 | static void gfar_clear_exact_match(struct net_device *dev); | |
148 | static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr); | |
1da177e4 | 149 | |
7282d491 | 150 | extern const struct ethtool_ops gfar_ethtool_ops; |
1da177e4 LT |
151 | |
152 | MODULE_AUTHOR("Freescale Semiconductor, Inc"); | |
153 | MODULE_DESCRIPTION("Gianfar Ethernet Driver"); | |
154 | MODULE_LICENSE("GPL"); | |
155 | ||
7f7f5316 AF |
156 | /* Returns 1 if incoming frames use an FCB */ |
157 | static inline int gfar_uses_fcb(struct gfar_private *priv) | |
0bbaf069 | 158 | { |
7f7f5316 | 159 | return (priv->vlan_enable || priv->rx_csum_enable); |
0bbaf069 | 160 | } |
bb40dcbb AF |
161 | |
162 | /* Set up the ethernet device structure, private data, | |
163 | * and anything else we need before we start */ | |
3ae5eaec | 164 | static int gfar_probe(struct platform_device *pdev) |
1da177e4 LT |
165 | { |
166 | u32 tempval; | |
167 | struct net_device *dev = NULL; | |
168 | struct gfar_private *priv = NULL; | |
1da177e4 LT |
169 | struct gianfar_platform_data *einfo; |
170 | struct resource *r; | |
1da177e4 | 171 | int err = 0; |
0795af57 | 172 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
173 | |
174 | einfo = (struct gianfar_platform_data *) pdev->dev.platform_data; | |
175 | ||
bb40dcbb | 176 | if (NULL == einfo) { |
1da177e4 LT |
177 | printk(KERN_ERR "gfar %d: Missing additional data!\n", |
178 | pdev->id); | |
179 | ||
180 | return -ENODEV; | |
181 | } | |
182 | ||
183 | /* Create an ethernet device instance */ | |
184 | dev = alloc_etherdev(sizeof (*priv)); | |
185 | ||
bb40dcbb | 186 | if (NULL == dev) |
1da177e4 LT |
187 | return -ENOMEM; |
188 | ||
189 | priv = netdev_priv(dev); | |
bea3348e | 190 | priv->dev = dev; |
1da177e4 LT |
191 | |
192 | /* Set the info in the priv to the current info */ | |
193 | priv->einfo = einfo; | |
194 | ||
195 | /* fill out IRQ fields */ | |
196 | if (einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
197 | priv->interruptTransmit = platform_get_irq_byname(pdev, "tx"); | |
198 | priv->interruptReceive = platform_get_irq_byname(pdev, "rx"); | |
199 | priv->interruptError = platform_get_irq_byname(pdev, "error"); | |
48944738 DV |
200 | if (priv->interruptTransmit < 0 || priv->interruptReceive < 0 || priv->interruptError < 0) |
201 | goto regs_fail; | |
1da177e4 LT |
202 | } else { |
203 | priv->interruptTransmit = platform_get_irq(pdev, 0); | |
48944738 DV |
204 | if (priv->interruptTransmit < 0) |
205 | goto regs_fail; | |
1da177e4 LT |
206 | } |
207 | ||
208 | /* get a pointer to the register memory */ | |
209 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
cc8c6e37 | 210 | priv->regs = ioremap(r->start, sizeof (struct gfar)); |
1da177e4 | 211 | |
bb40dcbb | 212 | if (NULL == priv->regs) { |
1da177e4 LT |
213 | err = -ENOMEM; |
214 | goto regs_fail; | |
215 | } | |
216 | ||
fef6108d AF |
217 | spin_lock_init(&priv->txlock); |
218 | spin_lock_init(&priv->rxlock); | |
1da177e4 | 219 | |
3ae5eaec | 220 | platform_set_drvdata(pdev, dev); |
1da177e4 LT |
221 | |
222 | /* Stop the DMA engine now, in case it was running before */ | |
223 | /* (The firmware could have used it, and left it running). */ | |
224 | /* To do this, we write Graceful Receive Stop and Graceful */ | |
225 | /* Transmit Stop, and then wait until the corresponding bits */ | |
226 | /* in IEVENT indicate the stops have completed. */ | |
227 | tempval = gfar_read(&priv->regs->dmactrl); | |
228 | tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); | |
229 | gfar_write(&priv->regs->dmactrl, tempval); | |
230 | ||
231 | tempval = gfar_read(&priv->regs->dmactrl); | |
232 | tempval |= (DMACTRL_GRS | DMACTRL_GTS); | |
233 | gfar_write(&priv->regs->dmactrl, tempval); | |
234 | ||
235 | while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC))) | |
236 | cpu_relax(); | |
237 | ||
238 | /* Reset MAC layer */ | |
239 | gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET); | |
240 | ||
241 | tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW); | |
242 | gfar_write(&priv->regs->maccfg1, tempval); | |
243 | ||
244 | /* Initialize MACCFG2. */ | |
245 | gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS); | |
246 | ||
247 | /* Initialize ECNTRL */ | |
248 | gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS); | |
249 | ||
250 | /* Copy the station address into the dev structure, */ | |
251 | memcpy(dev->dev_addr, einfo->mac_addr, MAC_ADDR_LEN); | |
252 | ||
253 | /* Set the dev->base_addr to the gfar reg region */ | |
254 | dev->base_addr = (unsigned long) (priv->regs); | |
255 | ||
3ae5eaec | 256 | SET_NETDEV_DEV(dev, &pdev->dev); |
1da177e4 LT |
257 | |
258 | /* Fill in the dev structure */ | |
259 | dev->open = gfar_enet_open; | |
260 | dev->hard_start_xmit = gfar_start_xmit; | |
261 | dev->tx_timeout = gfar_timeout; | |
262 | dev->watchdog_timeo = TX_TIMEOUT; | |
94e8cc35 | 263 | #ifdef CONFIG_GFAR_NAPI |
bea3348e | 264 | netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT); |
94e8cc35 | 265 | #endif |
f2d71c2d VW |
266 | #ifdef CONFIG_NET_POLL_CONTROLLER |
267 | dev->poll_controller = gfar_netpoll; | |
1da177e4 LT |
268 | #endif |
269 | dev->stop = gfar_close; | |
1da177e4 LT |
270 | dev->change_mtu = gfar_change_mtu; |
271 | dev->mtu = 1500; | |
272 | dev->set_multicast_list = gfar_set_multi; | |
273 | ||
0bbaf069 KG |
274 | dev->ethtool_ops = &gfar_ethtool_ops; |
275 | ||
276 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) { | |
277 | priv->rx_csum_enable = 1; | |
278 | dev->features |= NETIF_F_IP_CSUM; | |
279 | } else | |
280 | priv->rx_csum_enable = 0; | |
281 | ||
282 | priv->vlgrp = NULL; | |
1da177e4 | 283 | |
0bbaf069 KG |
284 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) { |
285 | dev->vlan_rx_register = gfar_vlan_rx_register; | |
1da177e4 | 286 | |
0bbaf069 KG |
287 | dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; |
288 | ||
289 | priv->vlan_enable = 1; | |
290 | } | |
291 | ||
292 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) { | |
293 | priv->extended_hash = 1; | |
294 | priv->hash_width = 9; | |
295 | ||
296 | priv->hash_regs[0] = &priv->regs->igaddr0; | |
297 | priv->hash_regs[1] = &priv->regs->igaddr1; | |
298 | priv->hash_regs[2] = &priv->regs->igaddr2; | |
299 | priv->hash_regs[3] = &priv->regs->igaddr3; | |
300 | priv->hash_regs[4] = &priv->regs->igaddr4; | |
301 | priv->hash_regs[5] = &priv->regs->igaddr5; | |
302 | priv->hash_regs[6] = &priv->regs->igaddr6; | |
303 | priv->hash_regs[7] = &priv->regs->igaddr7; | |
304 | priv->hash_regs[8] = &priv->regs->gaddr0; | |
305 | priv->hash_regs[9] = &priv->regs->gaddr1; | |
306 | priv->hash_regs[10] = &priv->regs->gaddr2; | |
307 | priv->hash_regs[11] = &priv->regs->gaddr3; | |
308 | priv->hash_regs[12] = &priv->regs->gaddr4; | |
309 | priv->hash_regs[13] = &priv->regs->gaddr5; | |
310 | priv->hash_regs[14] = &priv->regs->gaddr6; | |
311 | priv->hash_regs[15] = &priv->regs->gaddr7; | |
312 | ||
313 | } else { | |
314 | priv->extended_hash = 0; | |
315 | priv->hash_width = 8; | |
316 | ||
317 | priv->hash_regs[0] = &priv->regs->gaddr0; | |
318 | priv->hash_regs[1] = &priv->regs->gaddr1; | |
319 | priv->hash_regs[2] = &priv->regs->gaddr2; | |
320 | priv->hash_regs[3] = &priv->regs->gaddr3; | |
321 | priv->hash_regs[4] = &priv->regs->gaddr4; | |
322 | priv->hash_regs[5] = &priv->regs->gaddr5; | |
323 | priv->hash_regs[6] = &priv->regs->gaddr6; | |
324 | priv->hash_regs[7] = &priv->regs->gaddr7; | |
325 | } | |
326 | ||
327 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_PADDING) | |
328 | priv->padding = DEFAULT_PADDING; | |
329 | else | |
330 | priv->padding = 0; | |
331 | ||
0bbaf069 KG |
332 | if (dev->features & NETIF_F_IP_CSUM) |
333 | dev->hard_header_len += GMAC_FCB_LEN; | |
1da177e4 LT |
334 | |
335 | priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE; | |
1da177e4 LT |
336 | priv->tx_ring_size = DEFAULT_TX_RING_SIZE; |
337 | priv->rx_ring_size = DEFAULT_RX_RING_SIZE; | |
338 | ||
339 | priv->txcoalescing = DEFAULT_TX_COALESCE; | |
340 | priv->txcount = DEFAULT_TXCOUNT; | |
341 | priv->txtime = DEFAULT_TXTIME; | |
342 | priv->rxcoalescing = DEFAULT_RX_COALESCE; | |
343 | priv->rxcount = DEFAULT_RXCOUNT; | |
344 | priv->rxtime = DEFAULT_RXTIME; | |
345 | ||
0bbaf069 KG |
346 | /* Enable most messages by default */ |
347 | priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; | |
348 | ||
1da177e4 LT |
349 | err = register_netdev(dev); |
350 | ||
351 | if (err) { | |
352 | printk(KERN_ERR "%s: Cannot register net device, aborting.\n", | |
353 | dev->name); | |
354 | goto register_fail; | |
355 | } | |
356 | ||
7f7f5316 AF |
357 | /* Create all the sysfs files */ |
358 | gfar_init_sysfs(dev); | |
359 | ||
1da177e4 | 360 | /* Print out the device info */ |
0795af57 JP |
361 | printk(KERN_INFO DEVICE_NAME "%s\n", |
362 | dev->name, print_mac(mac, dev->dev_addr)); | |
1da177e4 LT |
363 | |
364 | /* Even more device info helps when determining which kernel */ | |
7f7f5316 | 365 | /* provided which set of benchmarks. */ |
1da177e4 LT |
366 | #ifdef CONFIG_GFAR_NAPI |
367 | printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name); | |
368 | #else | |
369 | printk(KERN_INFO "%s: Running with NAPI disabled\n", dev->name); | |
370 | #endif | |
371 | printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n", | |
372 | dev->name, priv->rx_ring_size, priv->tx_ring_size); | |
373 | ||
374 | return 0; | |
375 | ||
376 | register_fail: | |
cc8c6e37 | 377 | iounmap(priv->regs); |
1da177e4 LT |
378 | regs_fail: |
379 | free_netdev(dev); | |
bb40dcbb | 380 | return err; |
1da177e4 LT |
381 | } |
382 | ||
3ae5eaec | 383 | static int gfar_remove(struct platform_device *pdev) |
1da177e4 | 384 | { |
3ae5eaec | 385 | struct net_device *dev = platform_get_drvdata(pdev); |
1da177e4 LT |
386 | struct gfar_private *priv = netdev_priv(dev); |
387 | ||
3ae5eaec | 388 | platform_set_drvdata(pdev, NULL); |
1da177e4 | 389 | |
cc8c6e37 | 390 | iounmap(priv->regs); |
1da177e4 LT |
391 | free_netdev(dev); |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | ||
e8a2b6a4 AF |
397 | /* Reads the controller's registers to determine what interface |
398 | * connects it to the PHY. | |
399 | */ | |
400 | static phy_interface_t gfar_get_interface(struct net_device *dev) | |
401 | { | |
402 | struct gfar_private *priv = netdev_priv(dev); | |
403 | u32 ecntrl = gfar_read(&priv->regs->ecntrl); | |
404 | ||
405 | if (ecntrl & ECNTRL_SGMII_MODE) | |
406 | return PHY_INTERFACE_MODE_SGMII; | |
407 | ||
408 | if (ecntrl & ECNTRL_TBI_MODE) { | |
409 | if (ecntrl & ECNTRL_REDUCED_MODE) | |
410 | return PHY_INTERFACE_MODE_RTBI; | |
411 | else | |
412 | return PHY_INTERFACE_MODE_TBI; | |
413 | } | |
414 | ||
415 | if (ecntrl & ECNTRL_REDUCED_MODE) { | |
416 | if (ecntrl & ECNTRL_REDUCED_MII_MODE) | |
417 | return PHY_INTERFACE_MODE_RMII; | |
7132ab7f AF |
418 | else { |
419 | phy_interface_t interface = priv->einfo->interface; | |
420 | ||
421 | /* | |
422 | * This isn't autodetected right now, so it must | |
423 | * be set by the device tree or platform code. | |
424 | */ | |
425 | if (interface == PHY_INTERFACE_MODE_RGMII_ID) | |
426 | return PHY_INTERFACE_MODE_RGMII_ID; | |
427 | ||
e8a2b6a4 | 428 | return PHY_INTERFACE_MODE_RGMII; |
7132ab7f | 429 | } |
e8a2b6a4 AF |
430 | } |
431 | ||
432 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT) | |
433 | return PHY_INTERFACE_MODE_GMII; | |
434 | ||
435 | return PHY_INTERFACE_MODE_MII; | |
436 | } | |
437 | ||
438 | ||
bb40dcbb AF |
439 | /* Initializes driver's PHY state, and attaches to the PHY. |
440 | * Returns 0 on success. | |
1da177e4 LT |
441 | */ |
442 | static int init_phy(struct net_device *dev) | |
443 | { | |
444 | struct gfar_private *priv = netdev_priv(dev); | |
bb40dcbb AF |
445 | uint gigabit_support = |
446 | priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ? | |
447 | SUPPORTED_1000baseT_Full : 0; | |
448 | struct phy_device *phydev; | |
4d3248a2 | 449 | char phy_id[BUS_ID_SIZE]; |
e8a2b6a4 | 450 | phy_interface_t interface; |
1da177e4 LT |
451 | |
452 | priv->oldlink = 0; | |
453 | priv->oldspeed = 0; | |
454 | priv->oldduplex = -1; | |
455 | ||
4d3248a2 KG |
456 | snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, priv->einfo->bus_id, priv->einfo->phy_id); |
457 | ||
e8a2b6a4 AF |
458 | interface = gfar_get_interface(dev); |
459 | ||
460 | phydev = phy_connect(dev, phy_id, &adjust_link, 0, interface); | |
1da177e4 | 461 | |
d3c12873 KJ |
462 | if (interface == PHY_INTERFACE_MODE_SGMII) |
463 | gfar_configure_serdes(dev); | |
464 | ||
bb40dcbb AF |
465 | if (IS_ERR(phydev)) { |
466 | printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); | |
467 | return PTR_ERR(phydev); | |
1da177e4 LT |
468 | } |
469 | ||
bb40dcbb AF |
470 | /* Remove any features not supported by the controller */ |
471 | phydev->supported &= (GFAR_SUPPORTED | gigabit_support); | |
472 | phydev->advertising = phydev->supported; | |
1da177e4 | 473 | |
bb40dcbb | 474 | priv->phydev = phydev; |
1da177e4 LT |
475 | |
476 | return 0; | |
1da177e4 LT |
477 | } |
478 | ||
d3c12873 KJ |
479 | static void gfar_configure_serdes(struct net_device *dev) |
480 | { | |
481 | struct gfar_private *priv = netdev_priv(dev); | |
482 | struct gfar_mii __iomem *regs = | |
483 | (void __iomem *)&priv->regs->gfar_mii_regs; | |
484 | ||
485 | /* Initialise TBI i/f to communicate with serdes (lynx phy) */ | |
486 | ||
487 | /* Single clk mode, mii mode off(for aerdes communication) */ | |
488 | gfar_local_mdio_write(regs, TBIPA_VALUE, MII_TBICON, TBICON_CLK_SELECT); | |
489 | ||
490 | /* Supported pause and full-duplex, no half-duplex */ | |
491 | gfar_local_mdio_write(regs, TBIPA_VALUE, MII_ADVERTISE, | |
492 | ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | | |
493 | ADVERTISE_1000XPSE_ASYM); | |
494 | ||
495 | /* ANEG enable, restart ANEG, full duplex mode, speed[1] set */ | |
496 | gfar_local_mdio_write(regs, TBIPA_VALUE, MII_BMCR, BMCR_ANENABLE | | |
497 | BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000); | |
498 | } | |
499 | ||
1da177e4 LT |
500 | static void init_registers(struct net_device *dev) |
501 | { | |
502 | struct gfar_private *priv = netdev_priv(dev); | |
503 | ||
504 | /* Clear IEVENT */ | |
505 | gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR); | |
506 | ||
507 | /* Initialize IMASK */ | |
508 | gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR); | |
509 | ||
510 | /* Init hash registers to zero */ | |
0bbaf069 KG |
511 | gfar_write(&priv->regs->igaddr0, 0); |
512 | gfar_write(&priv->regs->igaddr1, 0); | |
513 | gfar_write(&priv->regs->igaddr2, 0); | |
514 | gfar_write(&priv->regs->igaddr3, 0); | |
515 | gfar_write(&priv->regs->igaddr4, 0); | |
516 | gfar_write(&priv->regs->igaddr5, 0); | |
517 | gfar_write(&priv->regs->igaddr6, 0); | |
518 | gfar_write(&priv->regs->igaddr7, 0); | |
1da177e4 LT |
519 | |
520 | gfar_write(&priv->regs->gaddr0, 0); | |
521 | gfar_write(&priv->regs->gaddr1, 0); | |
522 | gfar_write(&priv->regs->gaddr2, 0); | |
523 | gfar_write(&priv->regs->gaddr3, 0); | |
524 | gfar_write(&priv->regs->gaddr4, 0); | |
525 | gfar_write(&priv->regs->gaddr5, 0); | |
526 | gfar_write(&priv->regs->gaddr6, 0); | |
527 | gfar_write(&priv->regs->gaddr7, 0); | |
528 | ||
1da177e4 LT |
529 | /* Zero out the rmon mib registers if it has them */ |
530 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { | |
cc8c6e37 | 531 | memset_io(&(priv->regs->rmon), 0, sizeof (struct rmon_mib)); |
1da177e4 LT |
532 | |
533 | /* Mask off the CAM interrupts */ | |
534 | gfar_write(&priv->regs->rmon.cam1, 0xffffffff); | |
535 | gfar_write(&priv->regs->rmon.cam2, 0xffffffff); | |
536 | } | |
537 | ||
538 | /* Initialize the max receive buffer length */ | |
539 | gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); | |
540 | ||
1da177e4 LT |
541 | /* Initialize the Minimum Frame Length Register */ |
542 | gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS); | |
543 | ||
1da177e4 LT |
544 | /* Assign the TBI an address which won't conflict with the PHYs */ |
545 | gfar_write(&priv->regs->tbipa, TBIPA_VALUE); | |
546 | } | |
547 | ||
0bbaf069 KG |
548 | |
549 | /* Halt the receive and transmit queues */ | |
550 | void gfar_halt(struct net_device *dev) | |
1da177e4 LT |
551 | { |
552 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 553 | struct gfar __iomem *regs = priv->regs; |
1da177e4 LT |
554 | u32 tempval; |
555 | ||
1da177e4 LT |
556 | /* Mask all interrupts */ |
557 | gfar_write(®s->imask, IMASK_INIT_CLEAR); | |
558 | ||
559 | /* Clear all interrupts */ | |
560 | gfar_write(®s->ievent, IEVENT_INIT_CLEAR); | |
561 | ||
562 | /* Stop the DMA, and wait for it to stop */ | |
563 | tempval = gfar_read(&priv->regs->dmactrl); | |
564 | if ((tempval & (DMACTRL_GRS | DMACTRL_GTS)) | |
565 | != (DMACTRL_GRS | DMACTRL_GTS)) { | |
566 | tempval |= (DMACTRL_GRS | DMACTRL_GTS); | |
567 | gfar_write(&priv->regs->dmactrl, tempval); | |
568 | ||
569 | while (!(gfar_read(&priv->regs->ievent) & | |
570 | (IEVENT_GRSC | IEVENT_GTSC))) | |
571 | cpu_relax(); | |
572 | } | |
573 | ||
574 | /* Disable Rx and Tx */ | |
575 | tempval = gfar_read(®s->maccfg1); | |
576 | tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN); | |
577 | gfar_write(®s->maccfg1, tempval); | |
0bbaf069 KG |
578 | } |
579 | ||
580 | void stop_gfar(struct net_device *dev) | |
581 | { | |
582 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 583 | struct gfar __iomem *regs = priv->regs; |
0bbaf069 KG |
584 | unsigned long flags; |
585 | ||
bb40dcbb AF |
586 | phy_stop(priv->phydev); |
587 | ||
0bbaf069 | 588 | /* Lock it down */ |
fef6108d AF |
589 | spin_lock_irqsave(&priv->txlock, flags); |
590 | spin_lock(&priv->rxlock); | |
0bbaf069 | 591 | |
0bbaf069 | 592 | gfar_halt(dev); |
1da177e4 | 593 | |
fef6108d AF |
594 | spin_unlock(&priv->rxlock); |
595 | spin_unlock_irqrestore(&priv->txlock, flags); | |
1da177e4 LT |
596 | |
597 | /* Free the IRQs */ | |
598 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
599 | free_irq(priv->interruptError, dev); | |
600 | free_irq(priv->interruptTransmit, dev); | |
601 | free_irq(priv->interruptReceive, dev); | |
602 | } else { | |
bb40dcbb | 603 | free_irq(priv->interruptTransmit, dev); |
1da177e4 LT |
604 | } |
605 | ||
606 | free_skb_resources(priv); | |
607 | ||
cf782298 | 608 | dma_free_coherent(&dev->dev, |
1da177e4 LT |
609 | sizeof(struct txbd8)*priv->tx_ring_size |
610 | + sizeof(struct rxbd8)*priv->rx_ring_size, | |
611 | priv->tx_bd_base, | |
0bbaf069 | 612 | gfar_read(®s->tbase0)); |
1da177e4 LT |
613 | } |
614 | ||
615 | /* If there are any tx skbs or rx skbs still around, free them. | |
616 | * Then free tx_skbuff and rx_skbuff */ | |
bb40dcbb | 617 | static void free_skb_resources(struct gfar_private *priv) |
1da177e4 LT |
618 | { |
619 | struct rxbd8 *rxbdp; | |
620 | struct txbd8 *txbdp; | |
621 | int i; | |
622 | ||
623 | /* Go through all the buffer descriptors and free their data buffers */ | |
624 | txbdp = priv->tx_bd_base; | |
625 | ||
626 | for (i = 0; i < priv->tx_ring_size; i++) { | |
627 | ||
628 | if (priv->tx_skbuff[i]) { | |
cf782298 | 629 | dma_unmap_single(&priv->dev->dev, txbdp->bufPtr, |
1da177e4 LT |
630 | txbdp->length, |
631 | DMA_TO_DEVICE); | |
632 | dev_kfree_skb_any(priv->tx_skbuff[i]); | |
633 | priv->tx_skbuff[i] = NULL; | |
634 | } | |
635 | } | |
636 | ||
637 | kfree(priv->tx_skbuff); | |
638 | ||
639 | rxbdp = priv->rx_bd_base; | |
640 | ||
641 | /* rx_skbuff is not guaranteed to be allocated, so only | |
642 | * free it and its contents if it is allocated */ | |
643 | if(priv->rx_skbuff != NULL) { | |
644 | for (i = 0; i < priv->rx_ring_size; i++) { | |
645 | if (priv->rx_skbuff[i]) { | |
cf782298 | 646 | dma_unmap_single(&priv->dev->dev, rxbdp->bufPtr, |
7f7f5316 | 647 | priv->rx_buffer_size, |
1da177e4 LT |
648 | DMA_FROM_DEVICE); |
649 | ||
650 | dev_kfree_skb_any(priv->rx_skbuff[i]); | |
651 | priv->rx_skbuff[i] = NULL; | |
652 | } | |
653 | ||
654 | rxbdp->status = 0; | |
655 | rxbdp->length = 0; | |
656 | rxbdp->bufPtr = 0; | |
657 | ||
658 | rxbdp++; | |
659 | } | |
660 | ||
661 | kfree(priv->rx_skbuff); | |
662 | } | |
663 | } | |
664 | ||
0bbaf069 KG |
665 | void gfar_start(struct net_device *dev) |
666 | { | |
667 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 668 | struct gfar __iomem *regs = priv->regs; |
0bbaf069 KG |
669 | u32 tempval; |
670 | ||
671 | /* Enable Rx and Tx in MACCFG1 */ | |
672 | tempval = gfar_read(®s->maccfg1); | |
673 | tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN); | |
674 | gfar_write(®s->maccfg1, tempval); | |
675 | ||
676 | /* Initialize DMACTRL to have WWR and WOP */ | |
677 | tempval = gfar_read(&priv->regs->dmactrl); | |
678 | tempval |= DMACTRL_INIT_SETTINGS; | |
679 | gfar_write(&priv->regs->dmactrl, tempval); | |
680 | ||
0bbaf069 KG |
681 | /* Make sure we aren't stopped */ |
682 | tempval = gfar_read(&priv->regs->dmactrl); | |
683 | tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); | |
684 | gfar_write(&priv->regs->dmactrl, tempval); | |
685 | ||
fef6108d AF |
686 | /* Clear THLT/RHLT, so that the DMA starts polling now */ |
687 | gfar_write(®s->tstat, TSTAT_CLEAR_THALT); | |
688 | gfar_write(®s->rstat, RSTAT_CLEAR_RHALT); | |
689 | ||
0bbaf069 KG |
690 | /* Unmask the interrupts we look for */ |
691 | gfar_write(®s->imask, IMASK_DEFAULT); | |
692 | } | |
693 | ||
1da177e4 LT |
694 | /* Bring the controller up and running */ |
695 | int startup_gfar(struct net_device *dev) | |
696 | { | |
697 | struct txbd8 *txbdp; | |
698 | struct rxbd8 *rxbdp; | |
f9663aea | 699 | dma_addr_t addr = 0; |
1da177e4 LT |
700 | unsigned long vaddr; |
701 | int i; | |
702 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 703 | struct gfar __iomem *regs = priv->regs; |
1da177e4 | 704 | int err = 0; |
0bbaf069 | 705 | u32 rctrl = 0; |
7f7f5316 | 706 | u32 attrs = 0; |
1da177e4 LT |
707 | |
708 | gfar_write(®s->imask, IMASK_INIT_CLEAR); | |
709 | ||
710 | /* Allocate memory for the buffer descriptors */ | |
cf782298 | 711 | vaddr = (unsigned long) dma_alloc_coherent(&dev->dev, |
1da177e4 LT |
712 | sizeof (struct txbd8) * priv->tx_ring_size + |
713 | sizeof (struct rxbd8) * priv->rx_ring_size, | |
714 | &addr, GFP_KERNEL); | |
715 | ||
716 | if (vaddr == 0) { | |
0bbaf069 KG |
717 | if (netif_msg_ifup(priv)) |
718 | printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n", | |
719 | dev->name); | |
1da177e4 LT |
720 | return -ENOMEM; |
721 | } | |
722 | ||
723 | priv->tx_bd_base = (struct txbd8 *) vaddr; | |
724 | ||
725 | /* enet DMA only understands physical addresses */ | |
0bbaf069 | 726 | gfar_write(®s->tbase0, addr); |
1da177e4 LT |
727 | |
728 | /* Start the rx descriptor ring where the tx ring leaves off */ | |
729 | addr = addr + sizeof (struct txbd8) * priv->tx_ring_size; | |
730 | vaddr = vaddr + sizeof (struct txbd8) * priv->tx_ring_size; | |
731 | priv->rx_bd_base = (struct rxbd8 *) vaddr; | |
0bbaf069 | 732 | gfar_write(®s->rbase0, addr); |
1da177e4 LT |
733 | |
734 | /* Setup the skbuff rings */ | |
735 | priv->tx_skbuff = | |
736 | (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) * | |
737 | priv->tx_ring_size, GFP_KERNEL); | |
738 | ||
bb40dcbb | 739 | if (NULL == priv->tx_skbuff) { |
0bbaf069 KG |
740 | if (netif_msg_ifup(priv)) |
741 | printk(KERN_ERR "%s: Could not allocate tx_skbuff\n", | |
742 | dev->name); | |
1da177e4 LT |
743 | err = -ENOMEM; |
744 | goto tx_skb_fail; | |
745 | } | |
746 | ||
747 | for (i = 0; i < priv->tx_ring_size; i++) | |
748 | priv->tx_skbuff[i] = NULL; | |
749 | ||
750 | priv->rx_skbuff = | |
751 | (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) * | |
752 | priv->rx_ring_size, GFP_KERNEL); | |
753 | ||
bb40dcbb | 754 | if (NULL == priv->rx_skbuff) { |
0bbaf069 KG |
755 | if (netif_msg_ifup(priv)) |
756 | printk(KERN_ERR "%s: Could not allocate rx_skbuff\n", | |
757 | dev->name); | |
1da177e4 LT |
758 | err = -ENOMEM; |
759 | goto rx_skb_fail; | |
760 | } | |
761 | ||
762 | for (i = 0; i < priv->rx_ring_size; i++) | |
763 | priv->rx_skbuff[i] = NULL; | |
764 | ||
765 | /* Initialize some variables in our dev structure */ | |
766 | priv->dirty_tx = priv->cur_tx = priv->tx_bd_base; | |
767 | priv->cur_rx = priv->rx_bd_base; | |
768 | priv->skb_curtx = priv->skb_dirtytx = 0; | |
769 | priv->skb_currx = 0; | |
770 | ||
771 | /* Initialize Transmit Descriptor Ring */ | |
772 | txbdp = priv->tx_bd_base; | |
773 | for (i = 0; i < priv->tx_ring_size; i++) { | |
774 | txbdp->status = 0; | |
775 | txbdp->length = 0; | |
776 | txbdp->bufPtr = 0; | |
777 | txbdp++; | |
778 | } | |
779 | ||
780 | /* Set the last descriptor in the ring to indicate wrap */ | |
781 | txbdp--; | |
782 | txbdp->status |= TXBD_WRAP; | |
783 | ||
784 | rxbdp = priv->rx_bd_base; | |
785 | for (i = 0; i < priv->rx_ring_size; i++) { | |
786 | struct sk_buff *skb = NULL; | |
787 | ||
788 | rxbdp->status = 0; | |
789 | ||
790 | skb = gfar_new_skb(dev, rxbdp); | |
791 | ||
792 | priv->rx_skbuff[i] = skb; | |
793 | ||
794 | rxbdp++; | |
795 | } | |
796 | ||
797 | /* Set the last descriptor in the ring to wrap */ | |
798 | rxbdp--; | |
799 | rxbdp->status |= RXBD_WRAP; | |
800 | ||
801 | /* If the device has multiple interrupts, register for | |
802 | * them. Otherwise, only register for the one */ | |
803 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
0bbaf069 | 804 | /* Install our interrupt handlers for Error, |
1da177e4 LT |
805 | * Transmit, and Receive */ |
806 | if (request_irq(priv->interruptError, gfar_error, | |
807 | 0, "enet_error", dev) < 0) { | |
0bbaf069 KG |
808 | if (netif_msg_intr(priv)) |
809 | printk(KERN_ERR "%s: Can't get IRQ %d\n", | |
810 | dev->name, priv->interruptError); | |
1da177e4 LT |
811 | |
812 | err = -1; | |
813 | goto err_irq_fail; | |
814 | } | |
815 | ||
816 | if (request_irq(priv->interruptTransmit, gfar_transmit, | |
817 | 0, "enet_tx", dev) < 0) { | |
0bbaf069 KG |
818 | if (netif_msg_intr(priv)) |
819 | printk(KERN_ERR "%s: Can't get IRQ %d\n", | |
820 | dev->name, priv->interruptTransmit); | |
1da177e4 LT |
821 | |
822 | err = -1; | |
823 | ||
824 | goto tx_irq_fail; | |
825 | } | |
826 | ||
827 | if (request_irq(priv->interruptReceive, gfar_receive, | |
828 | 0, "enet_rx", dev) < 0) { | |
0bbaf069 KG |
829 | if (netif_msg_intr(priv)) |
830 | printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n", | |
831 | dev->name, priv->interruptReceive); | |
1da177e4 LT |
832 | |
833 | err = -1; | |
834 | goto rx_irq_fail; | |
835 | } | |
836 | } else { | |
837 | if (request_irq(priv->interruptTransmit, gfar_interrupt, | |
838 | 0, "gfar_interrupt", dev) < 0) { | |
0bbaf069 KG |
839 | if (netif_msg_intr(priv)) |
840 | printk(KERN_ERR "%s: Can't get IRQ %d\n", | |
841 | dev->name, priv->interruptError); | |
1da177e4 LT |
842 | |
843 | err = -1; | |
844 | goto err_irq_fail; | |
845 | } | |
846 | } | |
847 | ||
bb40dcbb | 848 | phy_start(priv->phydev); |
1da177e4 LT |
849 | |
850 | /* Configure the coalescing support */ | |
851 | if (priv->txcoalescing) | |
852 | gfar_write(®s->txic, | |
853 | mk_ic_value(priv->txcount, priv->txtime)); | |
854 | else | |
855 | gfar_write(®s->txic, 0); | |
856 | ||
857 | if (priv->rxcoalescing) | |
858 | gfar_write(®s->rxic, | |
859 | mk_ic_value(priv->rxcount, priv->rxtime)); | |
860 | else | |
861 | gfar_write(®s->rxic, 0); | |
862 | ||
0bbaf069 KG |
863 | if (priv->rx_csum_enable) |
864 | rctrl |= RCTRL_CHECKSUMMING; | |
1da177e4 | 865 | |
7f7f5316 | 866 | if (priv->extended_hash) { |
0bbaf069 | 867 | rctrl |= RCTRL_EXTHASH; |
1da177e4 | 868 | |
7f7f5316 AF |
869 | gfar_clear_exact_match(dev); |
870 | rctrl |= RCTRL_EMEN; | |
871 | } | |
872 | ||
0bbaf069 KG |
873 | if (priv->vlan_enable) |
874 | rctrl |= RCTRL_VLAN; | |
1da177e4 | 875 | |
7f7f5316 AF |
876 | if (priv->padding) { |
877 | rctrl &= ~RCTRL_PAL_MASK; | |
878 | rctrl |= RCTRL_PADDING(priv->padding); | |
879 | } | |
880 | ||
0bbaf069 KG |
881 | /* Init rctrl based on our settings */ |
882 | gfar_write(&priv->regs->rctrl, rctrl); | |
1da177e4 | 883 | |
0bbaf069 KG |
884 | if (dev->features & NETIF_F_IP_CSUM) |
885 | gfar_write(&priv->regs->tctrl, TCTRL_INIT_CSUM); | |
1da177e4 | 886 | |
7f7f5316 AF |
887 | /* Set the extraction length and index */ |
888 | attrs = ATTRELI_EL(priv->rx_stash_size) | | |
889 | ATTRELI_EI(priv->rx_stash_index); | |
890 | ||
891 | gfar_write(&priv->regs->attreli, attrs); | |
892 | ||
893 | /* Start with defaults, and add stashing or locking | |
894 | * depending on the approprate variables */ | |
895 | attrs = ATTR_INIT_SETTINGS; | |
896 | ||
897 | if (priv->bd_stash_en) | |
898 | attrs |= ATTR_BDSTASH; | |
899 | ||
900 | if (priv->rx_stash_size != 0) | |
901 | attrs |= ATTR_BUFSTASH; | |
902 | ||
903 | gfar_write(&priv->regs->attr, attrs); | |
904 | ||
905 | gfar_write(&priv->regs->fifo_tx_thr, priv->fifo_threshold); | |
906 | gfar_write(&priv->regs->fifo_tx_starve, priv->fifo_starve); | |
907 | gfar_write(&priv->regs->fifo_tx_starve_shutoff, priv->fifo_starve_off); | |
908 | ||
909 | /* Start the controller */ | |
0bbaf069 | 910 | gfar_start(dev); |
1da177e4 LT |
911 | |
912 | return 0; | |
913 | ||
914 | rx_irq_fail: | |
915 | free_irq(priv->interruptTransmit, dev); | |
916 | tx_irq_fail: | |
917 | free_irq(priv->interruptError, dev); | |
918 | err_irq_fail: | |
919 | rx_skb_fail: | |
920 | free_skb_resources(priv); | |
921 | tx_skb_fail: | |
cf782298 | 922 | dma_free_coherent(&dev->dev, |
1da177e4 LT |
923 | sizeof(struct txbd8)*priv->tx_ring_size |
924 | + sizeof(struct rxbd8)*priv->rx_ring_size, | |
925 | priv->tx_bd_base, | |
0bbaf069 | 926 | gfar_read(®s->tbase0)); |
1da177e4 | 927 | |
1da177e4 LT |
928 | return err; |
929 | } | |
930 | ||
931 | /* Called when something needs to use the ethernet device */ | |
932 | /* Returns 0 for success. */ | |
933 | static int gfar_enet_open(struct net_device *dev) | |
934 | { | |
293c8513 | 935 | #ifdef CONFIG_GFAR_NAPI |
94e8cc35 | 936 | struct gfar_private *priv = netdev_priv(dev); |
293c8513 | 937 | #endif |
1da177e4 LT |
938 | int err; |
939 | ||
293c8513 | 940 | #ifdef CONFIG_GFAR_NAPI |
bea3348e | 941 | napi_enable(&priv->napi); |
293c8513 | 942 | #endif |
bea3348e | 943 | |
1da177e4 LT |
944 | /* Initialize a bunch of registers */ |
945 | init_registers(dev); | |
946 | ||
947 | gfar_set_mac_address(dev); | |
948 | ||
949 | err = init_phy(dev); | |
950 | ||
bea3348e | 951 | if(err) { |
293c8513 | 952 | #ifdef CONFIG_GFAR_NAPI |
bea3348e | 953 | napi_disable(&priv->napi); |
293c8513 | 954 | #endif |
1da177e4 | 955 | return err; |
bea3348e | 956 | } |
1da177e4 LT |
957 | |
958 | err = startup_gfar(dev); | |
db0e8e3f | 959 | if (err) { |
293c8513 | 960 | #ifdef CONFIG_GFAR_NAPI |
bea3348e | 961 | napi_disable(&priv->napi); |
293c8513 | 962 | #endif |
db0e8e3f AV |
963 | return err; |
964 | } | |
1da177e4 LT |
965 | |
966 | netif_start_queue(dev); | |
967 | ||
968 | return err; | |
969 | } | |
970 | ||
7f7f5316 | 971 | static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb, struct txbd8 *bdp) |
0bbaf069 KG |
972 | { |
973 | struct txfcb *fcb = (struct txfcb *)skb_push (skb, GMAC_FCB_LEN); | |
974 | ||
975 | memset(fcb, 0, GMAC_FCB_LEN); | |
976 | ||
0bbaf069 KG |
977 | return fcb; |
978 | } | |
979 | ||
980 | static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb) | |
981 | { | |
7f7f5316 | 982 | u8 flags = 0; |
0bbaf069 KG |
983 | |
984 | /* If we're here, it's a IP packet with a TCP or UDP | |
985 | * payload. We set it to checksum, using a pseudo-header | |
986 | * we provide | |
987 | */ | |
7f7f5316 | 988 | flags = TXFCB_DEFAULT; |
0bbaf069 | 989 | |
7f7f5316 AF |
990 | /* Tell the controller what the protocol is */ |
991 | /* And provide the already calculated phcs */ | |
eddc9ec5 | 992 | if (ip_hdr(skb)->protocol == IPPROTO_UDP) { |
7f7f5316 | 993 | flags |= TXFCB_UDP; |
4bedb452 | 994 | fcb->phcs = udp_hdr(skb)->check; |
7f7f5316 | 995 | } else |
8da32de5 | 996 | fcb->phcs = tcp_hdr(skb)->check; |
0bbaf069 KG |
997 | |
998 | /* l3os is the distance between the start of the | |
999 | * frame (skb->data) and the start of the IP hdr. | |
1000 | * l4os is the distance between the start of the | |
1001 | * l3 hdr and the l4 hdr */ | |
bbe735e4 | 1002 | fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN); |
cfe1fc77 | 1003 | fcb->l4os = skb_network_header_len(skb); |
0bbaf069 | 1004 | |
7f7f5316 | 1005 | fcb->flags = flags; |
0bbaf069 KG |
1006 | } |
1007 | ||
7f7f5316 | 1008 | void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb) |
0bbaf069 | 1009 | { |
7f7f5316 | 1010 | fcb->flags |= TXFCB_VLN; |
0bbaf069 KG |
1011 | fcb->vlctl = vlan_tx_tag_get(skb); |
1012 | } | |
1013 | ||
1da177e4 LT |
1014 | /* This is called by the kernel when a frame is ready for transmission. */ |
1015 | /* It is pointed to by the dev->hard_start_xmit function pointer */ | |
1016 | static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1017 | { | |
1018 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 | 1019 | struct txfcb *fcb = NULL; |
1da177e4 | 1020 | struct txbd8 *txbdp; |
7f7f5316 | 1021 | u16 status; |
fef6108d | 1022 | unsigned long flags; |
1da177e4 LT |
1023 | |
1024 | /* Update transmit stats */ | |
09f75cd7 | 1025 | dev->stats.tx_bytes += skb->len; |
1da177e4 LT |
1026 | |
1027 | /* Lock priv now */ | |
fef6108d | 1028 | spin_lock_irqsave(&priv->txlock, flags); |
1da177e4 LT |
1029 | |
1030 | /* Point at the first free tx descriptor */ | |
1031 | txbdp = priv->cur_tx; | |
1032 | ||
1033 | /* Clear all but the WRAP status flags */ | |
7f7f5316 | 1034 | status = txbdp->status & TXBD_WRAP; |
1da177e4 | 1035 | |
0bbaf069 | 1036 | /* Set up checksumming */ |
7f7f5316 | 1037 | if (likely((dev->features & NETIF_F_IP_CSUM) |
84fa7933 | 1038 | && (CHECKSUM_PARTIAL == skb->ip_summed))) { |
0bbaf069 | 1039 | fcb = gfar_add_fcb(skb, txbdp); |
7f7f5316 | 1040 | status |= TXBD_TOE; |
0bbaf069 KG |
1041 | gfar_tx_checksum(skb, fcb); |
1042 | } | |
1043 | ||
1044 | if (priv->vlan_enable && | |
1045 | unlikely(priv->vlgrp && vlan_tx_tag_present(skb))) { | |
7f7f5316 | 1046 | if (unlikely(NULL == fcb)) { |
0bbaf069 | 1047 | fcb = gfar_add_fcb(skb, txbdp); |
7f7f5316 AF |
1048 | status |= TXBD_TOE; |
1049 | } | |
0bbaf069 KG |
1050 | |
1051 | gfar_tx_vlan(skb, fcb); | |
1052 | } | |
1053 | ||
1da177e4 LT |
1054 | /* Set buffer length and pointer */ |
1055 | txbdp->length = skb->len; | |
cf782298 | 1056 | txbdp->bufPtr = dma_map_single(&dev->dev, skb->data, |
1da177e4 LT |
1057 | skb->len, DMA_TO_DEVICE); |
1058 | ||
1059 | /* Save the skb pointer so we can free it later */ | |
1060 | priv->tx_skbuff[priv->skb_curtx] = skb; | |
1061 | ||
1062 | /* Update the current skb pointer (wrapping if this was the last) */ | |
1063 | priv->skb_curtx = | |
1064 | (priv->skb_curtx + 1) & TX_RING_MOD_MASK(priv->tx_ring_size); | |
1065 | ||
1066 | /* Flag the BD as interrupt-causing */ | |
7f7f5316 | 1067 | status |= TXBD_INTERRUPT; |
1da177e4 LT |
1068 | |
1069 | /* Flag the BD as ready to go, last in frame, and */ | |
1070 | /* in need of CRC */ | |
7f7f5316 | 1071 | status |= (TXBD_READY | TXBD_LAST | TXBD_CRC); |
1da177e4 LT |
1072 | |
1073 | dev->trans_start = jiffies; | |
1074 | ||
3b6330ce SW |
1075 | /* The powerpc-specific eieio() is used, as wmb() has too strong |
1076 | * semantics (it requires synchronization between cacheable and | |
1077 | * uncacheable mappings, which eieio doesn't provide and which we | |
1078 | * don't need), thus requiring a more expensive sync instruction. At | |
1079 | * some point, the set of architecture-independent barrier functions | |
1080 | * should be expanded to include weaker barriers. | |
1081 | */ | |
1082 | ||
1083 | eieio(); | |
7f7f5316 AF |
1084 | txbdp->status = status; |
1085 | ||
1da177e4 LT |
1086 | /* If this was the last BD in the ring, the next one */ |
1087 | /* is at the beginning of the ring */ | |
1088 | if (txbdp->status & TXBD_WRAP) | |
1089 | txbdp = priv->tx_bd_base; | |
1090 | else | |
1091 | txbdp++; | |
1092 | ||
1093 | /* If the next BD still needs to be cleaned up, then the bds | |
1094 | are full. We need to tell the kernel to stop sending us stuff. */ | |
1095 | if (txbdp == priv->dirty_tx) { | |
1096 | netif_stop_queue(dev); | |
1097 | ||
09f75cd7 | 1098 | dev->stats.tx_fifo_errors++; |
1da177e4 LT |
1099 | } |
1100 | ||
1101 | /* Update the current txbd to the next one */ | |
1102 | priv->cur_tx = txbdp; | |
1103 | ||
1104 | /* Tell the DMA to go go go */ | |
1105 | gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); | |
1106 | ||
1107 | /* Unlock priv */ | |
fef6108d | 1108 | spin_unlock_irqrestore(&priv->txlock, flags); |
1da177e4 LT |
1109 | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | /* Stops the kernel queue, and halts the controller */ | |
1114 | static int gfar_close(struct net_device *dev) | |
1115 | { | |
1116 | struct gfar_private *priv = netdev_priv(dev); | |
bea3348e | 1117 | |
293c8513 | 1118 | #ifdef CONFIG_GFAR_NAPI |
bea3348e | 1119 | napi_disable(&priv->napi); |
293c8513 | 1120 | #endif |
bea3348e | 1121 | |
1da177e4 LT |
1122 | stop_gfar(dev); |
1123 | ||
bb40dcbb AF |
1124 | /* Disconnect from the PHY */ |
1125 | phy_disconnect(priv->phydev); | |
1126 | priv->phydev = NULL; | |
1da177e4 LT |
1127 | |
1128 | netif_stop_queue(dev); | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
1da177e4 LT |
1133 | /* Changes the mac address if the controller is not running. */ |
1134 | int gfar_set_mac_address(struct net_device *dev) | |
1135 | { | |
7f7f5316 | 1136 | gfar_set_mac_for_addr(dev, 0, dev->dev_addr); |
1da177e4 LT |
1137 | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | ||
0bbaf069 KG |
1142 | /* Enables and disables VLAN insertion/extraction */ |
1143 | static void gfar_vlan_rx_register(struct net_device *dev, | |
1144 | struct vlan_group *grp) | |
1145 | { | |
1146 | struct gfar_private *priv = netdev_priv(dev); | |
1147 | unsigned long flags; | |
1148 | u32 tempval; | |
1149 | ||
fef6108d | 1150 | spin_lock_irqsave(&priv->rxlock, flags); |
0bbaf069 KG |
1151 | |
1152 | priv->vlgrp = grp; | |
1153 | ||
1154 | if (grp) { | |
1155 | /* Enable VLAN tag insertion */ | |
1156 | tempval = gfar_read(&priv->regs->tctrl); | |
1157 | tempval |= TCTRL_VLINS; | |
1158 | ||
1159 | gfar_write(&priv->regs->tctrl, tempval); | |
6aa20a22 | 1160 | |
0bbaf069 KG |
1161 | /* Enable VLAN tag extraction */ |
1162 | tempval = gfar_read(&priv->regs->rctrl); | |
1163 | tempval |= RCTRL_VLEX; | |
1164 | gfar_write(&priv->regs->rctrl, tempval); | |
1165 | } else { | |
1166 | /* Disable VLAN tag insertion */ | |
1167 | tempval = gfar_read(&priv->regs->tctrl); | |
1168 | tempval &= ~TCTRL_VLINS; | |
1169 | gfar_write(&priv->regs->tctrl, tempval); | |
1170 | ||
1171 | /* Disable VLAN tag extraction */ | |
1172 | tempval = gfar_read(&priv->regs->rctrl); | |
1173 | tempval &= ~RCTRL_VLEX; | |
1174 | gfar_write(&priv->regs->rctrl, tempval); | |
1175 | } | |
1176 | ||
fef6108d | 1177 | spin_unlock_irqrestore(&priv->rxlock, flags); |
0bbaf069 KG |
1178 | } |
1179 | ||
1da177e4 LT |
1180 | static int gfar_change_mtu(struct net_device *dev, int new_mtu) |
1181 | { | |
1182 | int tempsize, tempval; | |
1183 | struct gfar_private *priv = netdev_priv(dev); | |
1184 | int oldsize = priv->rx_buffer_size; | |
0bbaf069 KG |
1185 | int frame_size = new_mtu + ETH_HLEN; |
1186 | ||
1187 | if (priv->vlan_enable) | |
faa89577 | 1188 | frame_size += VLAN_HLEN; |
0bbaf069 KG |
1189 | |
1190 | if (gfar_uses_fcb(priv)) | |
1191 | frame_size += GMAC_FCB_LEN; | |
1192 | ||
1193 | frame_size += priv->padding; | |
1da177e4 LT |
1194 | |
1195 | if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) { | |
0bbaf069 KG |
1196 | if (netif_msg_drv(priv)) |
1197 | printk(KERN_ERR "%s: Invalid MTU setting\n", | |
1198 | dev->name); | |
1da177e4 LT |
1199 | return -EINVAL; |
1200 | } | |
1201 | ||
1202 | tempsize = | |
1203 | (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) + | |
1204 | INCREMENTAL_BUFFER_SIZE; | |
1205 | ||
1206 | /* Only stop and start the controller if it isn't already | |
7f7f5316 | 1207 | * stopped, and we changed something */ |
1da177e4 LT |
1208 | if ((oldsize != tempsize) && (dev->flags & IFF_UP)) |
1209 | stop_gfar(dev); | |
1210 | ||
1211 | priv->rx_buffer_size = tempsize; | |
1212 | ||
1213 | dev->mtu = new_mtu; | |
1214 | ||
1215 | gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); | |
1216 | gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size); | |
1217 | ||
1218 | /* If the mtu is larger than the max size for standard | |
1219 | * ethernet frames (ie, a jumbo frame), then set maccfg2 | |
1220 | * to allow huge frames, and to check the length */ | |
1221 | tempval = gfar_read(&priv->regs->maccfg2); | |
1222 | ||
1223 | if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE) | |
1224 | tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); | |
1225 | else | |
1226 | tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); | |
1227 | ||
1228 | gfar_write(&priv->regs->maccfg2, tempval); | |
1229 | ||
1230 | if ((oldsize != tempsize) && (dev->flags & IFF_UP)) | |
1231 | startup_gfar(dev); | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | /* gfar_timeout gets called when a packet has not been | |
1237 | * transmitted after a set amount of time. | |
1238 | * For now, assume that clearing out all the structures, and | |
1239 | * starting over will fix the problem. */ | |
1240 | static void gfar_timeout(struct net_device *dev) | |
1241 | { | |
09f75cd7 | 1242 | dev->stats.tx_errors++; |
1da177e4 LT |
1243 | |
1244 | if (dev->flags & IFF_UP) { | |
1245 | stop_gfar(dev); | |
1246 | startup_gfar(dev); | |
1247 | } | |
1248 | ||
1249 | netif_schedule(dev); | |
1250 | } | |
1251 | ||
1252 | /* Interrupt Handler for Transmit complete */ | |
d080cd63 | 1253 | int gfar_clean_tx_ring(struct net_device *dev) |
1da177e4 | 1254 | { |
1da177e4 | 1255 | struct txbd8 *bdp; |
d080cd63 DH |
1256 | struct gfar_private *priv = netdev_priv(dev); |
1257 | int howmany = 0; | |
1da177e4 | 1258 | |
1da177e4 LT |
1259 | bdp = priv->dirty_tx; |
1260 | while ((bdp->status & TXBD_READY) == 0) { | |
1261 | /* If dirty_tx and cur_tx are the same, then either the */ | |
1262 | /* ring is empty or full now (it could only be full in the beginning, */ | |
1263 | /* obviously). If it is empty, we are done. */ | |
1264 | if ((bdp == priv->cur_tx) && (netif_queue_stopped(dev) == 0)) | |
1265 | break; | |
1266 | ||
d080cd63 | 1267 | howmany++; |
1da177e4 LT |
1268 | |
1269 | /* Deferred means some collisions occurred during transmit, */ | |
1270 | /* but we eventually sent the packet. */ | |
1271 | if (bdp->status & TXBD_DEF) | |
09f75cd7 | 1272 | dev->stats.collisions++; |
1da177e4 LT |
1273 | |
1274 | /* Free the sk buffer associated with this TxBD */ | |
1275 | dev_kfree_skb_irq(priv->tx_skbuff[priv->skb_dirtytx]); | |
d080cd63 | 1276 | |
1da177e4 LT |
1277 | priv->tx_skbuff[priv->skb_dirtytx] = NULL; |
1278 | priv->skb_dirtytx = | |
1279 | (priv->skb_dirtytx + | |
1280 | 1) & TX_RING_MOD_MASK(priv->tx_ring_size); | |
1281 | ||
d080cd63 DH |
1282 | /* Clean BD length for empty detection */ |
1283 | bdp->length = 0; | |
1284 | ||
1da177e4 LT |
1285 | /* update bdp to point at next bd in the ring (wrapping if necessary) */ |
1286 | if (bdp->status & TXBD_WRAP) | |
1287 | bdp = priv->tx_bd_base; | |
1288 | else | |
1289 | bdp++; | |
1290 | ||
1291 | /* Move dirty_tx to be the next bd */ | |
1292 | priv->dirty_tx = bdp; | |
1293 | ||
1294 | /* We freed a buffer, so now we can restart transmission */ | |
1295 | if (netif_queue_stopped(dev)) | |
1296 | netif_wake_queue(dev); | |
1297 | } /* while ((bdp->status & TXBD_READY) == 0) */ | |
1298 | ||
d080cd63 DH |
1299 | dev->stats.tx_packets += howmany; |
1300 | ||
1301 | return howmany; | |
1302 | } | |
1303 | ||
1304 | /* Interrupt Handler for Transmit complete */ | |
1305 | static irqreturn_t gfar_transmit(int irq, void *dev_id) | |
1306 | { | |
1307 | struct net_device *dev = (struct net_device *) dev_id; | |
1308 | struct gfar_private *priv = netdev_priv(dev); | |
1309 | ||
1310 | /* Clear IEVENT */ | |
1311 | gfar_write(&priv->regs->ievent, IEVENT_TX_MASK); | |
1312 | ||
1313 | /* Lock priv */ | |
1314 | spin_lock(&priv->txlock); | |
1315 | ||
1316 | gfar_clean_tx_ring(dev); | |
1317 | ||
1da177e4 LT |
1318 | /* If we are coalescing the interrupts, reset the timer */ |
1319 | /* Otherwise, clear it */ | |
2f448911 AF |
1320 | if (likely(priv->txcoalescing)) { |
1321 | gfar_write(&priv->regs->txic, 0); | |
1da177e4 LT |
1322 | gfar_write(&priv->regs->txic, |
1323 | mk_ic_value(priv->txcount, priv->txtime)); | |
2f448911 | 1324 | } |
1da177e4 | 1325 | |
fef6108d | 1326 | spin_unlock(&priv->txlock); |
1da177e4 LT |
1327 | |
1328 | return IRQ_HANDLED; | |
1329 | } | |
1330 | ||
1331 | struct sk_buff * gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp) | |
1332 | { | |
7f7f5316 | 1333 | unsigned int alignamount; |
1da177e4 LT |
1334 | struct gfar_private *priv = netdev_priv(dev); |
1335 | struct sk_buff *skb = NULL; | |
1336 | unsigned int timeout = SKB_ALLOC_TIMEOUT; | |
1337 | ||
1338 | /* We have to allocate the skb, so keep trying till we succeed */ | |
1339 | while ((!skb) && timeout--) | |
1340 | skb = dev_alloc_skb(priv->rx_buffer_size + RXBUF_ALIGNMENT); | |
1341 | ||
bb40dcbb | 1342 | if (NULL == skb) |
1da177e4 LT |
1343 | return NULL; |
1344 | ||
7f7f5316 | 1345 | alignamount = RXBUF_ALIGNMENT - |
bea3348e | 1346 | (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)); |
7f7f5316 | 1347 | |
1da177e4 LT |
1348 | /* We need the data buffer to be aligned properly. We will reserve |
1349 | * as many bytes as needed to align the data properly | |
1350 | */ | |
7f7f5316 | 1351 | skb_reserve(skb, alignamount); |
1da177e4 | 1352 | |
cf782298 | 1353 | bdp->bufPtr = dma_map_single(&dev->dev, skb->data, |
7f7f5316 | 1354 | priv->rx_buffer_size, DMA_FROM_DEVICE); |
1da177e4 LT |
1355 | |
1356 | bdp->length = 0; | |
1357 | ||
1358 | /* Mark the buffer empty */ | |
3b6330ce | 1359 | eieio(); |
1da177e4 LT |
1360 | bdp->status |= (RXBD_EMPTY | RXBD_INTERRUPT); |
1361 | ||
1362 | return skb; | |
1363 | } | |
1364 | ||
298e1a9e | 1365 | static inline void count_errors(unsigned short status, struct net_device *dev) |
1da177e4 | 1366 | { |
298e1a9e | 1367 | struct gfar_private *priv = netdev_priv(dev); |
09f75cd7 | 1368 | struct net_device_stats *stats = &dev->stats; |
1da177e4 LT |
1369 | struct gfar_extra_stats *estats = &priv->extra_stats; |
1370 | ||
1371 | /* If the packet was truncated, none of the other errors | |
1372 | * matter */ | |
1373 | if (status & RXBD_TRUNCATED) { | |
1374 | stats->rx_length_errors++; | |
1375 | ||
1376 | estats->rx_trunc++; | |
1377 | ||
1378 | return; | |
1379 | } | |
1380 | /* Count the errors, if there were any */ | |
1381 | if (status & (RXBD_LARGE | RXBD_SHORT)) { | |
1382 | stats->rx_length_errors++; | |
1383 | ||
1384 | if (status & RXBD_LARGE) | |
1385 | estats->rx_large++; | |
1386 | else | |
1387 | estats->rx_short++; | |
1388 | } | |
1389 | if (status & RXBD_NONOCTET) { | |
1390 | stats->rx_frame_errors++; | |
1391 | estats->rx_nonoctet++; | |
1392 | } | |
1393 | if (status & RXBD_CRCERR) { | |
1394 | estats->rx_crcerr++; | |
1395 | stats->rx_crc_errors++; | |
1396 | } | |
1397 | if (status & RXBD_OVERRUN) { | |
1398 | estats->rx_overrun++; | |
1399 | stats->rx_crc_errors++; | |
1400 | } | |
1401 | } | |
1402 | ||
7d12e780 | 1403 | irqreturn_t gfar_receive(int irq, void *dev_id) |
1da177e4 LT |
1404 | { |
1405 | struct net_device *dev = (struct net_device *) dev_id; | |
1406 | struct gfar_private *priv = netdev_priv(dev); | |
1da177e4 LT |
1407 | #ifdef CONFIG_GFAR_NAPI |
1408 | u32 tempval; | |
fef6108d AF |
1409 | #else |
1410 | unsigned long flags; | |
1da177e4 LT |
1411 | #endif |
1412 | ||
1da177e4 LT |
1413 | /* support NAPI */ |
1414 | #ifdef CONFIG_GFAR_NAPI | |
d080cd63 DH |
1415 | /* Clear IEVENT, so interrupts aren't called again |
1416 | * because of the packets that have already arrived */ | |
1417 | gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK); | |
1418 | ||
bea3348e | 1419 | if (netif_rx_schedule_prep(dev, &priv->napi)) { |
1da177e4 | 1420 | tempval = gfar_read(&priv->regs->imask); |
d080cd63 | 1421 | tempval &= IMASK_RTX_DISABLED; |
1da177e4 LT |
1422 | gfar_write(&priv->regs->imask, tempval); |
1423 | ||
bea3348e | 1424 | __netif_rx_schedule(dev, &priv->napi); |
1da177e4 | 1425 | } else { |
0bbaf069 KG |
1426 | if (netif_msg_rx_err(priv)) |
1427 | printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n", | |
1428 | dev->name, gfar_read(&priv->regs->ievent), | |
1429 | gfar_read(&priv->regs->imask)); | |
1da177e4 LT |
1430 | } |
1431 | #else | |
d080cd63 DH |
1432 | /* Clear IEVENT, so rx interrupt isn't called again |
1433 | * because of this interrupt */ | |
1434 | gfar_write(&priv->regs->ievent, IEVENT_RX_MASK); | |
1da177e4 | 1435 | |
fef6108d | 1436 | spin_lock_irqsave(&priv->rxlock, flags); |
1da177e4 LT |
1437 | gfar_clean_rx_ring(dev, priv->rx_ring_size); |
1438 | ||
1439 | /* If we are coalescing interrupts, update the timer */ | |
1440 | /* Otherwise, clear it */ | |
2f448911 AF |
1441 | if (likely(priv->rxcoalescing)) { |
1442 | gfar_write(&priv->regs->rxic, 0); | |
1da177e4 LT |
1443 | gfar_write(&priv->regs->rxic, |
1444 | mk_ic_value(priv->rxcount, priv->rxtime)); | |
2f448911 | 1445 | } |
1da177e4 | 1446 | |
fef6108d | 1447 | spin_unlock_irqrestore(&priv->rxlock, flags); |
1da177e4 LT |
1448 | #endif |
1449 | ||
1450 | return IRQ_HANDLED; | |
1451 | } | |
1452 | ||
0bbaf069 KG |
1453 | static inline int gfar_rx_vlan(struct sk_buff *skb, |
1454 | struct vlan_group *vlgrp, unsigned short vlctl) | |
1455 | { | |
1456 | #ifdef CONFIG_GFAR_NAPI | |
1457 | return vlan_hwaccel_receive_skb(skb, vlgrp, vlctl); | |
1458 | #else | |
1459 | return vlan_hwaccel_rx(skb, vlgrp, vlctl); | |
1460 | #endif | |
1461 | } | |
1462 | ||
1463 | static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb) | |
1464 | { | |
1465 | /* If valid headers were found, and valid sums | |
1466 | * were verified, then we tell the kernel that no | |
1467 | * checksumming is necessary. Otherwise, it is */ | |
7f7f5316 | 1468 | if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU)) |
0bbaf069 KG |
1469 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1470 | else | |
1471 | skb->ip_summed = CHECKSUM_NONE; | |
1472 | } | |
1473 | ||
1474 | ||
1475 | static inline struct rxfcb *gfar_get_fcb(struct sk_buff *skb) | |
1476 | { | |
1477 | struct rxfcb *fcb = (struct rxfcb *)skb->data; | |
1478 | ||
1479 | /* Remove the FCB from the skb */ | |
1480 | skb_pull(skb, GMAC_FCB_LEN); | |
1481 | ||
1482 | return fcb; | |
1483 | } | |
1da177e4 LT |
1484 | |
1485 | /* gfar_process_frame() -- handle one incoming packet if skb | |
1486 | * isn't NULL. */ | |
1487 | static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, | |
1488 | int length) | |
1489 | { | |
1490 | struct gfar_private *priv = netdev_priv(dev); | |
0bbaf069 | 1491 | struct rxfcb *fcb = NULL; |
1da177e4 | 1492 | |
bb40dcbb | 1493 | if (NULL == skb) { |
0bbaf069 KG |
1494 | if (netif_msg_rx_err(priv)) |
1495 | printk(KERN_WARNING "%s: Missing skb!!.\n", dev->name); | |
09f75cd7 | 1496 | dev->stats.rx_dropped++; |
1da177e4 LT |
1497 | priv->extra_stats.rx_skbmissing++; |
1498 | } else { | |
0bbaf069 KG |
1499 | int ret; |
1500 | ||
1da177e4 LT |
1501 | /* Prep the skb for the packet */ |
1502 | skb_put(skb, length); | |
1503 | ||
0bbaf069 KG |
1504 | /* Grab the FCB if there is one */ |
1505 | if (gfar_uses_fcb(priv)) | |
1506 | fcb = gfar_get_fcb(skb); | |
1507 | ||
1508 | /* Remove the padded bytes, if there are any */ | |
1509 | if (priv->padding) | |
1510 | skb_pull(skb, priv->padding); | |
1511 | ||
1512 | if (priv->rx_csum_enable) | |
1513 | gfar_rx_checksum(skb, fcb); | |
1514 | ||
1da177e4 LT |
1515 | /* Tell the skb what kind of packet this is */ |
1516 | skb->protocol = eth_type_trans(skb, dev); | |
1517 | ||
1518 | /* Send the packet up the stack */ | |
7f7f5316 | 1519 | if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN))) |
0bbaf069 KG |
1520 | ret = gfar_rx_vlan(skb, priv->vlgrp, fcb->vlctl); |
1521 | else | |
1522 | ret = RECEIVE(skb); | |
1523 | ||
1524 | if (NET_RX_DROP == ret) | |
1da177e4 | 1525 | priv->extra_stats.kernel_dropped++; |
1da177e4 LT |
1526 | } |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | /* gfar_clean_rx_ring() -- Processes each frame in the rx ring | |
0bbaf069 | 1532 | * until the budget/quota has been reached. Returns the number |
1da177e4 LT |
1533 | * of frames handled |
1534 | */ | |
0bbaf069 | 1535 | int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit) |
1da177e4 LT |
1536 | { |
1537 | struct rxbd8 *bdp; | |
1538 | struct sk_buff *skb; | |
1539 | u16 pkt_len; | |
1540 | int howmany = 0; | |
1541 | struct gfar_private *priv = netdev_priv(dev); | |
1542 | ||
1543 | /* Get the first full descriptor */ | |
1544 | bdp = priv->cur_rx; | |
1545 | ||
1546 | while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) { | |
3b6330ce | 1547 | rmb(); |
1da177e4 LT |
1548 | skb = priv->rx_skbuff[priv->skb_currx]; |
1549 | ||
99da5003 | 1550 | if ((bdp->status & RXBD_LAST) && !(bdp->status & RXBD_ERR)) { |
1da177e4 | 1551 | /* Increment the number of packets */ |
09f75cd7 | 1552 | dev->stats.rx_packets++; |
1da177e4 LT |
1553 | howmany++; |
1554 | ||
1555 | /* Remove the FCS from the packet length */ | |
1556 | pkt_len = bdp->length - 4; | |
1557 | ||
1558 | gfar_process_frame(dev, skb, pkt_len); | |
1559 | ||
09f75cd7 | 1560 | dev->stats.rx_bytes += pkt_len; |
1da177e4 | 1561 | } else { |
298e1a9e | 1562 | count_errors(bdp->status, dev); |
1da177e4 LT |
1563 | |
1564 | if (skb) | |
1565 | dev_kfree_skb_any(skb); | |
1566 | ||
1567 | priv->rx_skbuff[priv->skb_currx] = NULL; | |
1568 | } | |
1569 | ||
1570 | dev->last_rx = jiffies; | |
1571 | ||
1572 | /* Clear the status flags for this buffer */ | |
1573 | bdp->status &= ~RXBD_STATS; | |
1574 | ||
1575 | /* Add another skb for the future */ | |
1576 | skb = gfar_new_skb(dev, bdp); | |
1577 | priv->rx_skbuff[priv->skb_currx] = skb; | |
1578 | ||
1579 | /* Update to the next pointer */ | |
1580 | if (bdp->status & RXBD_WRAP) | |
1581 | bdp = priv->rx_bd_base; | |
1582 | else | |
1583 | bdp++; | |
1584 | ||
1585 | /* update to point at the next skb */ | |
1586 | priv->skb_currx = | |
1587 | (priv->skb_currx + | |
1588 | 1) & RX_RING_MOD_MASK(priv->rx_ring_size); | |
1589 | ||
1590 | } | |
1591 | ||
1592 | /* Update the current rxbd pointer to be the next one */ | |
1593 | priv->cur_rx = bdp; | |
1594 | ||
1da177e4 LT |
1595 | return howmany; |
1596 | } | |
1597 | ||
1598 | #ifdef CONFIG_GFAR_NAPI | |
bea3348e | 1599 | static int gfar_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1600 | { |
bea3348e SH |
1601 | struct gfar_private *priv = container_of(napi, struct gfar_private, napi); |
1602 | struct net_device *dev = priv->dev; | |
1da177e4 | 1603 | int howmany; |
d080cd63 DH |
1604 | unsigned long flags; |
1605 | ||
1606 | /* If we fail to get the lock, don't bother with the TX BDs */ | |
1607 | if (spin_trylock_irqsave(&priv->txlock, flags)) { | |
1608 | gfar_clean_tx_ring(dev); | |
1609 | spin_unlock_irqrestore(&priv->txlock, flags); | |
1610 | } | |
1da177e4 | 1611 | |
bea3348e | 1612 | howmany = gfar_clean_rx_ring(dev, budget); |
1da177e4 | 1613 | |
bea3348e SH |
1614 | if (howmany < budget) { |
1615 | netif_rx_complete(dev, napi); | |
1da177e4 LT |
1616 | |
1617 | /* Clear the halt bit in RSTAT */ | |
1618 | gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT); | |
1619 | ||
1620 | gfar_write(&priv->regs->imask, IMASK_DEFAULT); | |
1621 | ||
1622 | /* If we are coalescing interrupts, update the timer */ | |
1623 | /* Otherwise, clear it */ | |
2f448911 AF |
1624 | if (likely(priv->rxcoalescing)) { |
1625 | gfar_write(&priv->regs->rxic, 0); | |
1da177e4 LT |
1626 | gfar_write(&priv->regs->rxic, |
1627 | mk_ic_value(priv->rxcount, priv->rxtime)); | |
2f448911 | 1628 | } |
1da177e4 LT |
1629 | } |
1630 | ||
bea3348e | 1631 | return howmany; |
1da177e4 LT |
1632 | } |
1633 | #endif | |
1634 | ||
f2d71c2d VW |
1635 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1636 | /* | |
1637 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
1638 | * without having to re-enable interrupts. It's not called while | |
1639 | * the interrupt routine is executing. | |
1640 | */ | |
1641 | static void gfar_netpoll(struct net_device *dev) | |
1642 | { | |
1643 | struct gfar_private *priv = netdev_priv(dev); | |
1644 | ||
1645 | /* If the device has multiple interrupts, run tx/rx */ | |
1646 | if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { | |
1647 | disable_irq(priv->interruptTransmit); | |
1648 | disable_irq(priv->interruptReceive); | |
1649 | disable_irq(priv->interruptError); | |
1650 | gfar_interrupt(priv->interruptTransmit, dev); | |
1651 | enable_irq(priv->interruptError); | |
1652 | enable_irq(priv->interruptReceive); | |
1653 | enable_irq(priv->interruptTransmit); | |
1654 | } else { | |
1655 | disable_irq(priv->interruptTransmit); | |
1656 | gfar_interrupt(priv->interruptTransmit, dev); | |
1657 | enable_irq(priv->interruptTransmit); | |
1658 | } | |
1659 | } | |
1660 | #endif | |
1661 | ||
1da177e4 | 1662 | /* The interrupt handler for devices with one interrupt */ |
7d12e780 | 1663 | static irqreturn_t gfar_interrupt(int irq, void *dev_id) |
1da177e4 LT |
1664 | { |
1665 | struct net_device *dev = dev_id; | |
1666 | struct gfar_private *priv = netdev_priv(dev); | |
1667 | ||
1668 | /* Save ievent for future reference */ | |
1669 | u32 events = gfar_read(&priv->regs->ievent); | |
1670 | ||
1da177e4 | 1671 | /* Check for reception */ |
538cc7ee | 1672 | if (events & IEVENT_RX_MASK) |
7d12e780 | 1673 | gfar_receive(irq, dev_id); |
1da177e4 LT |
1674 | |
1675 | /* Check for transmit completion */ | |
538cc7ee | 1676 | if (events & IEVENT_TX_MASK) |
7d12e780 | 1677 | gfar_transmit(irq, dev_id); |
1da177e4 | 1678 | |
538cc7ee SS |
1679 | /* Check for errors */ |
1680 | if (events & IEVENT_ERR_MASK) | |
1681 | gfar_error(irq, dev_id); | |
1da177e4 LT |
1682 | |
1683 | return IRQ_HANDLED; | |
1684 | } | |
1685 | ||
1da177e4 LT |
1686 | /* Called every time the controller might need to be made |
1687 | * aware of new link state. The PHY code conveys this | |
bb40dcbb | 1688 | * information through variables in the phydev structure, and this |
1da177e4 LT |
1689 | * function converts those variables into the appropriate |
1690 | * register values, and can bring down the device if needed. | |
1691 | */ | |
1692 | static void adjust_link(struct net_device *dev) | |
1693 | { | |
1694 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 1695 | struct gfar __iomem *regs = priv->regs; |
bb40dcbb AF |
1696 | unsigned long flags; |
1697 | struct phy_device *phydev = priv->phydev; | |
1698 | int new_state = 0; | |
1699 | ||
fef6108d | 1700 | spin_lock_irqsave(&priv->txlock, flags); |
bb40dcbb AF |
1701 | if (phydev->link) { |
1702 | u32 tempval = gfar_read(®s->maccfg2); | |
7f7f5316 | 1703 | u32 ecntrl = gfar_read(®s->ecntrl); |
1da177e4 | 1704 | |
1da177e4 LT |
1705 | /* Now we make sure that we can be in full duplex mode. |
1706 | * If not, we operate in half-duplex mode. */ | |
bb40dcbb AF |
1707 | if (phydev->duplex != priv->oldduplex) { |
1708 | new_state = 1; | |
1709 | if (!(phydev->duplex)) | |
1da177e4 | 1710 | tempval &= ~(MACCFG2_FULL_DUPLEX); |
bb40dcbb | 1711 | else |
1da177e4 | 1712 | tempval |= MACCFG2_FULL_DUPLEX; |
1da177e4 | 1713 | |
bb40dcbb | 1714 | priv->oldduplex = phydev->duplex; |
1da177e4 LT |
1715 | } |
1716 | ||
bb40dcbb AF |
1717 | if (phydev->speed != priv->oldspeed) { |
1718 | new_state = 1; | |
1719 | switch (phydev->speed) { | |
1da177e4 | 1720 | case 1000: |
1da177e4 LT |
1721 | tempval = |
1722 | ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII); | |
1da177e4 LT |
1723 | break; |
1724 | case 100: | |
1725 | case 10: | |
1da177e4 LT |
1726 | tempval = |
1727 | ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII); | |
7f7f5316 AF |
1728 | |
1729 | /* Reduced mode distinguishes | |
1730 | * between 10 and 100 */ | |
1731 | if (phydev->speed == SPEED_100) | |
1732 | ecntrl |= ECNTRL_R100; | |
1733 | else | |
1734 | ecntrl &= ~(ECNTRL_R100); | |
1da177e4 LT |
1735 | break; |
1736 | default: | |
0bbaf069 KG |
1737 | if (netif_msg_link(priv)) |
1738 | printk(KERN_WARNING | |
bb40dcbb AF |
1739 | "%s: Ack! Speed (%d) is not 10/100/1000!\n", |
1740 | dev->name, phydev->speed); | |
1da177e4 LT |
1741 | break; |
1742 | } | |
1743 | ||
bb40dcbb | 1744 | priv->oldspeed = phydev->speed; |
1da177e4 LT |
1745 | } |
1746 | ||
bb40dcbb | 1747 | gfar_write(®s->maccfg2, tempval); |
7f7f5316 | 1748 | gfar_write(®s->ecntrl, ecntrl); |
bb40dcbb | 1749 | |
1da177e4 | 1750 | if (!priv->oldlink) { |
bb40dcbb | 1751 | new_state = 1; |
1da177e4 | 1752 | priv->oldlink = 1; |
1da177e4 LT |
1753 | netif_schedule(dev); |
1754 | } | |
bb40dcbb AF |
1755 | } else if (priv->oldlink) { |
1756 | new_state = 1; | |
1757 | priv->oldlink = 0; | |
1758 | priv->oldspeed = 0; | |
1759 | priv->oldduplex = -1; | |
1da177e4 | 1760 | } |
1da177e4 | 1761 | |
bb40dcbb AF |
1762 | if (new_state && netif_msg_link(priv)) |
1763 | phy_print_status(phydev); | |
1764 | ||
fef6108d | 1765 | spin_unlock_irqrestore(&priv->txlock, flags); |
bb40dcbb | 1766 | } |
1da177e4 LT |
1767 | |
1768 | /* Update the hash table based on the current list of multicast | |
1769 | * addresses we subscribe to. Also, change the promiscuity of | |
1770 | * the device based on the flags (this function is called | |
1771 | * whenever dev->flags is changed */ | |
1772 | static void gfar_set_multi(struct net_device *dev) | |
1773 | { | |
1774 | struct dev_mc_list *mc_ptr; | |
1775 | struct gfar_private *priv = netdev_priv(dev); | |
cc8c6e37 | 1776 | struct gfar __iomem *regs = priv->regs; |
1da177e4 LT |
1777 | u32 tempval; |
1778 | ||
1779 | if(dev->flags & IFF_PROMISC) { | |
1da177e4 LT |
1780 | /* Set RCTRL to PROM */ |
1781 | tempval = gfar_read(®s->rctrl); | |
1782 | tempval |= RCTRL_PROM; | |
1783 | gfar_write(®s->rctrl, tempval); | |
1784 | } else { | |
1785 | /* Set RCTRL to not PROM */ | |
1786 | tempval = gfar_read(®s->rctrl); | |
1787 | tempval &= ~(RCTRL_PROM); | |
1788 | gfar_write(®s->rctrl, tempval); | |
1789 | } | |
6aa20a22 | 1790 | |
1da177e4 LT |
1791 | if(dev->flags & IFF_ALLMULTI) { |
1792 | /* Set the hash to rx all multicast frames */ | |
0bbaf069 KG |
1793 | gfar_write(®s->igaddr0, 0xffffffff); |
1794 | gfar_write(®s->igaddr1, 0xffffffff); | |
1795 | gfar_write(®s->igaddr2, 0xffffffff); | |
1796 | gfar_write(®s->igaddr3, 0xffffffff); | |
1797 | gfar_write(®s->igaddr4, 0xffffffff); | |
1798 | gfar_write(®s->igaddr5, 0xffffffff); | |
1799 | gfar_write(®s->igaddr6, 0xffffffff); | |
1800 | gfar_write(®s->igaddr7, 0xffffffff); | |
1da177e4 LT |
1801 | gfar_write(®s->gaddr0, 0xffffffff); |
1802 | gfar_write(®s->gaddr1, 0xffffffff); | |
1803 | gfar_write(®s->gaddr2, 0xffffffff); | |
1804 | gfar_write(®s->gaddr3, 0xffffffff); | |
1805 | gfar_write(®s->gaddr4, 0xffffffff); | |
1806 | gfar_write(®s->gaddr5, 0xffffffff); | |
1807 | gfar_write(®s->gaddr6, 0xffffffff); | |
1808 | gfar_write(®s->gaddr7, 0xffffffff); | |
1809 | } else { | |
7f7f5316 AF |
1810 | int em_num; |
1811 | int idx; | |
1812 | ||
1da177e4 | 1813 | /* zero out the hash */ |
0bbaf069 KG |
1814 | gfar_write(®s->igaddr0, 0x0); |
1815 | gfar_write(®s->igaddr1, 0x0); | |
1816 | gfar_write(®s->igaddr2, 0x0); | |
1817 | gfar_write(®s->igaddr3, 0x0); | |
1818 | gfar_write(®s->igaddr4, 0x0); | |
1819 | gfar_write(®s->igaddr5, 0x0); | |
1820 | gfar_write(®s->igaddr6, 0x0); | |
1821 | gfar_write(®s->igaddr7, 0x0); | |
1da177e4 LT |
1822 | gfar_write(®s->gaddr0, 0x0); |
1823 | gfar_write(®s->gaddr1, 0x0); | |
1824 | gfar_write(®s->gaddr2, 0x0); | |
1825 | gfar_write(®s->gaddr3, 0x0); | |
1826 | gfar_write(®s->gaddr4, 0x0); | |
1827 | gfar_write(®s->gaddr5, 0x0); | |
1828 | gfar_write(®s->gaddr6, 0x0); | |
1829 | gfar_write(®s->gaddr7, 0x0); | |
1830 | ||
7f7f5316 AF |
1831 | /* If we have extended hash tables, we need to |
1832 | * clear the exact match registers to prepare for | |
1833 | * setting them */ | |
1834 | if (priv->extended_hash) { | |
1835 | em_num = GFAR_EM_NUM + 1; | |
1836 | gfar_clear_exact_match(dev); | |
1837 | idx = 1; | |
1838 | } else { | |
1839 | idx = 0; | |
1840 | em_num = 0; | |
1841 | } | |
1842 | ||
1da177e4 LT |
1843 | if(dev->mc_count == 0) |
1844 | return; | |
1845 | ||
1846 | /* Parse the list, and set the appropriate bits */ | |
1847 | for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) { | |
7f7f5316 AF |
1848 | if (idx < em_num) { |
1849 | gfar_set_mac_for_addr(dev, idx, | |
1850 | mc_ptr->dmi_addr); | |
1851 | idx++; | |
1852 | } else | |
1853 | gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr); | |
1da177e4 LT |
1854 | } |
1855 | } | |
1856 | ||
1857 | return; | |
1858 | } | |
1859 | ||
7f7f5316 AF |
1860 | |
1861 | /* Clears each of the exact match registers to zero, so they | |
1862 | * don't interfere with normal reception */ | |
1863 | static void gfar_clear_exact_match(struct net_device *dev) | |
1864 | { | |
1865 | int idx; | |
1866 | u8 zero_arr[MAC_ADDR_LEN] = {0,0,0,0,0,0}; | |
1867 | ||
1868 | for(idx = 1;idx < GFAR_EM_NUM + 1;idx++) | |
1869 | gfar_set_mac_for_addr(dev, idx, (u8 *)zero_arr); | |
1870 | } | |
1871 | ||
1da177e4 LT |
1872 | /* Set the appropriate hash bit for the given addr */ |
1873 | /* The algorithm works like so: | |
1874 | * 1) Take the Destination Address (ie the multicast address), and | |
1875 | * do a CRC on it (little endian), and reverse the bits of the | |
1876 | * result. | |
1877 | * 2) Use the 8 most significant bits as a hash into a 256-entry | |
1878 | * table. The table is controlled through 8 32-bit registers: | |
1879 | * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is | |
1880 | * gaddr7. This means that the 3 most significant bits in the | |
1881 | * hash index which gaddr register to use, and the 5 other bits | |
1882 | * indicate which bit (assuming an IBM numbering scheme, which | |
1883 | * for PowerPC (tm) is usually the case) in the register holds | |
1884 | * the entry. */ | |
1885 | static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr) | |
1886 | { | |
1887 | u32 tempval; | |
1888 | struct gfar_private *priv = netdev_priv(dev); | |
1da177e4 | 1889 | u32 result = ether_crc(MAC_ADDR_LEN, addr); |
0bbaf069 KG |
1890 | int width = priv->hash_width; |
1891 | u8 whichbit = (result >> (32 - width)) & 0x1f; | |
1892 | u8 whichreg = result >> (32 - width + 5); | |
1da177e4 LT |
1893 | u32 value = (1 << (31-whichbit)); |
1894 | ||
0bbaf069 | 1895 | tempval = gfar_read(priv->hash_regs[whichreg]); |
1da177e4 | 1896 | tempval |= value; |
0bbaf069 | 1897 | gfar_write(priv->hash_regs[whichreg], tempval); |
1da177e4 LT |
1898 | |
1899 | return; | |
1900 | } | |
1901 | ||
7f7f5316 AF |
1902 | |
1903 | /* There are multiple MAC Address register pairs on some controllers | |
1904 | * This function sets the numth pair to a given address | |
1905 | */ | |
1906 | static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr) | |
1907 | { | |
1908 | struct gfar_private *priv = netdev_priv(dev); | |
1909 | int idx; | |
1910 | char tmpbuf[MAC_ADDR_LEN]; | |
1911 | u32 tempval; | |
cc8c6e37 | 1912 | u32 __iomem *macptr = &priv->regs->macstnaddr1; |
7f7f5316 AF |
1913 | |
1914 | macptr += num*2; | |
1915 | ||
1916 | /* Now copy it into the mac registers backwards, cuz */ | |
1917 | /* little endian is silly */ | |
1918 | for (idx = 0; idx < MAC_ADDR_LEN; idx++) | |
1919 | tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx]; | |
1920 | ||
1921 | gfar_write(macptr, *((u32 *) (tmpbuf))); | |
1922 | ||
1923 | tempval = *((u32 *) (tmpbuf + 4)); | |
1924 | ||
1925 | gfar_write(macptr+1, tempval); | |
1926 | } | |
1927 | ||
1da177e4 | 1928 | /* GFAR error interrupt handler */ |
7d12e780 | 1929 | static irqreturn_t gfar_error(int irq, void *dev_id) |
1da177e4 LT |
1930 | { |
1931 | struct net_device *dev = dev_id; | |
1932 | struct gfar_private *priv = netdev_priv(dev); | |
1933 | ||
1934 | /* Save ievent for future reference */ | |
1935 | u32 events = gfar_read(&priv->regs->ievent); | |
1936 | ||
1937 | /* Clear IEVENT */ | |
1938 | gfar_write(&priv->regs->ievent, IEVENT_ERR_MASK); | |
1939 | ||
1940 | /* Hmm... */ | |
0bbaf069 KG |
1941 | if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv)) |
1942 | printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n", | |
538cc7ee | 1943 | dev->name, events, gfar_read(&priv->regs->imask)); |
1da177e4 LT |
1944 | |
1945 | /* Update the error counters */ | |
1946 | if (events & IEVENT_TXE) { | |
09f75cd7 | 1947 | dev->stats.tx_errors++; |
1da177e4 LT |
1948 | |
1949 | if (events & IEVENT_LC) | |
09f75cd7 | 1950 | dev->stats.tx_window_errors++; |
1da177e4 | 1951 | if (events & IEVENT_CRL) |
09f75cd7 | 1952 | dev->stats.tx_aborted_errors++; |
1da177e4 | 1953 | if (events & IEVENT_XFUN) { |
0bbaf069 | 1954 | if (netif_msg_tx_err(priv)) |
538cc7ee SS |
1955 | printk(KERN_DEBUG "%s: TX FIFO underrun, " |
1956 | "packet dropped.\n", dev->name); | |
09f75cd7 | 1957 | dev->stats.tx_dropped++; |
1da177e4 LT |
1958 | priv->extra_stats.tx_underrun++; |
1959 | ||
1960 | /* Reactivate the Tx Queues */ | |
1961 | gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); | |
1962 | } | |
0bbaf069 KG |
1963 | if (netif_msg_tx_err(priv)) |
1964 | printk(KERN_DEBUG "%s: Transmit Error\n", dev->name); | |
1da177e4 LT |
1965 | } |
1966 | if (events & IEVENT_BSY) { | |
09f75cd7 | 1967 | dev->stats.rx_errors++; |
1da177e4 LT |
1968 | priv->extra_stats.rx_bsy++; |
1969 | ||
7d12e780 | 1970 | gfar_receive(irq, dev_id); |
1da177e4 LT |
1971 | |
1972 | #ifndef CONFIG_GFAR_NAPI | |
1973 | /* Clear the halt bit in RSTAT */ | |
1974 | gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT); | |
1975 | #endif | |
1976 | ||
0bbaf069 | 1977 | if (netif_msg_rx_err(priv)) |
538cc7ee SS |
1978 | printk(KERN_DEBUG "%s: busy error (rstat: %x)\n", |
1979 | dev->name, gfar_read(&priv->regs->rstat)); | |
1da177e4 LT |
1980 | } |
1981 | if (events & IEVENT_BABR) { | |
09f75cd7 | 1982 | dev->stats.rx_errors++; |
1da177e4 LT |
1983 | priv->extra_stats.rx_babr++; |
1984 | ||
0bbaf069 | 1985 | if (netif_msg_rx_err(priv)) |
538cc7ee | 1986 | printk(KERN_DEBUG "%s: babbling RX error\n", dev->name); |
1da177e4 LT |
1987 | } |
1988 | if (events & IEVENT_EBERR) { | |
1989 | priv->extra_stats.eberr++; | |
0bbaf069 | 1990 | if (netif_msg_rx_err(priv)) |
538cc7ee | 1991 | printk(KERN_DEBUG "%s: bus error\n", dev->name); |
1da177e4 | 1992 | } |
0bbaf069 | 1993 | if ((events & IEVENT_RXC) && netif_msg_rx_status(priv)) |
538cc7ee | 1994 | printk(KERN_DEBUG "%s: control frame\n", dev->name); |
1da177e4 LT |
1995 | |
1996 | if (events & IEVENT_BABT) { | |
1997 | priv->extra_stats.tx_babt++; | |
0bbaf069 | 1998 | if (netif_msg_tx_err(priv)) |
538cc7ee | 1999 | printk(KERN_DEBUG "%s: babbling TX error\n", dev->name); |
1da177e4 LT |
2000 | } |
2001 | return IRQ_HANDLED; | |
2002 | } | |
2003 | ||
2004 | /* Structure for a device driver */ | |
3ae5eaec | 2005 | static struct platform_driver gfar_driver = { |
1da177e4 LT |
2006 | .probe = gfar_probe, |
2007 | .remove = gfar_remove, | |
3ae5eaec RK |
2008 | .driver = { |
2009 | .name = "fsl-gianfar", | |
2010 | }, | |
1da177e4 LT |
2011 | }; |
2012 | ||
2013 | static int __init gfar_init(void) | |
2014 | { | |
bb40dcbb AF |
2015 | int err = gfar_mdio_init(); |
2016 | ||
2017 | if (err) | |
2018 | return err; | |
2019 | ||
3ae5eaec | 2020 | err = platform_driver_register(&gfar_driver); |
bb40dcbb AF |
2021 | |
2022 | if (err) | |
2023 | gfar_mdio_exit(); | |
6aa20a22 | 2024 | |
bb40dcbb | 2025 | return err; |
1da177e4 LT |
2026 | } |
2027 | ||
2028 | static void __exit gfar_exit(void) | |
2029 | { | |
3ae5eaec | 2030 | platform_driver_unregister(&gfar_driver); |
bb40dcbb | 2031 | gfar_mdio_exit(); |
1da177e4 LT |
2032 | } |
2033 | ||
2034 | module_init(gfar_init); | |
2035 | module_exit(gfar_exit); | |
2036 |