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Kumar Gala0bbaf062005-06-20 10:54:21 -05001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * drivers/net/gianfar.c
3 *
4 * Gianfar Ethernet Driver
Andy Fleming7f7f5312005-11-11 12:38:59 -06005 * This driver is designed for the non-CPM ethernet controllers
6 * on the 85xx and 83xx family of integrated processors
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * Based on 8260_io/fcc_enet.c
8 *
9 * Author: Andy Fleming
Kumar Gala4c8d3d92005-11-13 16:06:30 -080010 * Maintainer: Kumar Gala
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 *
Andy Fleminge8a2b6a2006-12-01 12:01:06 -060012 * Copyright (c) 2002-2006 Freescale Semiconductor, Inc.
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +040013 * Copyright (c) 2007 MontaVista Software, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 *
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
Kumar Gala0bbaf062005-06-20 10:54:21 -050027 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 * 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
Andy Flemingbb40dcb2005-09-23 22:54:21 -040032 * day be supported.
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 *
34 * The Gianfar Ethernet Controller uses a ring of buffer
35 * descriptors. The beginning is indicated by a register
Kumar Gala0bbaf062005-06-20 10:54:21 -050036 * pointing to the physical address of the start of the ring.
37 * The end is determined by a "wrap" bit being set in the
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 * last descriptor of the ring.
39 *
40 * When a packet is received, the RXF bit in the
Kumar Gala0bbaf062005-06-20 10:54:21 -050041 * IEVENT register is set, triggering an interrupt when the
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 * 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
Andy Flemingbb40dcb2005-09-23 22:54:21 -040045 * of frames or amount of time have passed). In NAPI, the
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * 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
Kumar Gala0bbaf062005-06-20 10:54:21 -050049 * descriptor, and process every subsequent descriptor until there
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#include <linux/string.h>
70#include <linux/errno.h>
Andy Flemingbb40dcb2005-09-23 22:54:21 -040071#include <linux/unistd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#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>
Kumar Gala0bbaf062005-06-20 10:54:21 -050079#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#include <linux/spinlock.h>
81#include <linux/mm.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010082#include <linux/platform_device.h>
Kumar Gala0bbaf062005-06-20 10:54:21 -050083#include <linux/ip.h>
84#include <linux/tcp.h>
85#include <linux/udp.h>
Kumar Gala9c07b8842006-01-11 11:26:25 -080086#include <linux/in.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88#include <asm/io.h>
89#include <asm/irq.h>
90#include <asm/uaccess.h>
91#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070092#include <linux/dma-mapping.h>
93#include <linux/crc32.h>
Andy Flemingbb40dcb2005-09-23 22:54:21 -040094#include <linux/mii.h>
95#include <linux/phy.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97#include "gianfar.h"
Andy Flemingbb40dcb2005-09-23 22:54:21 -040098#include "gianfar_mii.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
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
111const char gfar_driver_name[] = "Gianfar Ethernet";
Andy Fleming7f7f5312005-11-11 12:38:59 -0600112const char gfar_driver_version[] = "1.3";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114static int gfar_enet_open(struct net_device *dev);
115static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
116static void gfar_timeout(struct net_device *dev);
117static int gfar_close(struct net_device *dev);
118struct sk_buff *gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119static int gfar_set_mac_address(struct net_device *dev);
120static int gfar_change_mtu(struct net_device *dev, int new_mtu);
David Howells7d12e782006-10-05 14:55:46 +0100121static irqreturn_t gfar_error(int irq, void *dev_id);
122static irqreturn_t gfar_transmit(int irq, void *dev_id);
123static irqreturn_t gfar_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124static void adjust_link(struct net_device *dev);
125static void init_registers(struct net_device *dev);
126static int init_phy(struct net_device *dev);
Russell King3ae5eae2005-11-09 22:32:44 +0000127static int gfar_probe(struct platform_device *pdev);
128static int gfar_remove(struct platform_device *pdev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400129static void free_skb_resources(struct gfar_private *priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130static void gfar_set_multi(struct net_device *dev);
131static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
Kapil Junejad3c12872007-05-11 18:25:11 -0500132static void gfar_configure_serdes(struct net_device *dev);
Al Virofdb26622008-02-13 03:58:36 +0000133extern int gfar_local_mdio_write(struct gfar_mii __iomem *regs, int mii_id, int regnum, u16 value);
134extern int gfar_local_mdio_read(struct gfar_mii __iomem *regs, int mii_id, int regnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135#ifdef CONFIG_GFAR_NAPI
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700136static int gfar_poll(struct napi_struct *napi, int budget);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137#endif
Vitaly Woolf2d71c22006-11-07 13:27:02 +0300138#ifdef CONFIG_NET_POLL_CONTROLLER
139static void gfar_netpoll(struct net_device *dev);
140#endif
Kumar Gala0bbaf062005-06-20 10:54:21 -0500141int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500143static void gfar_vlan_rx_register(struct net_device *netdev,
144 struct vlan_group *grp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600145void gfar_halt(struct net_device *dev);
146void gfar_start(struct net_device *dev);
147static void gfar_clear_exact_match(struct net_device *dev);
148static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Jeff Garzik7282d492006-09-13 14:30:00 -0400150extern const struct ethtool_ops gfar_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152MODULE_AUTHOR("Freescale Semiconductor, Inc");
153MODULE_DESCRIPTION("Gianfar Ethernet Driver");
154MODULE_LICENSE("GPL");
155
Andy Fleming7f7f5312005-11-11 12:38:59 -0600156/* Returns 1 if incoming frames use an FCB */
157static inline int gfar_uses_fcb(struct gfar_private *priv)
Kumar Gala0bbaf062005-06-20 10:54:21 -0500158{
Andy Fleming7f7f5312005-11-11 12:38:59 -0600159 return (priv->vlan_enable || priv->rx_csum_enable);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500160}
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400161
162/* Set up the ethernet device structure, private data,
163 * and anything else we need before we start */
Russell King3ae5eae2005-11-09 22:32:44 +0000164static int gfar_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
166 u32 tempval;
167 struct net_device *dev = NULL;
168 struct gfar_private *priv = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 struct gianfar_platform_data *einfo;
170 struct resource *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 int err = 0;
Joe Perches0795af52007-10-03 17:59:30 -0700172 DECLARE_MAC_BUF(mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174 einfo = (struct gianfar_platform_data *) pdev->dev.platform_data;
175
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400176 if (NULL == einfo) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 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
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400186 if (NULL == dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 return -ENOMEM;
188
189 priv = netdev_priv(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700190 priv->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
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");
David Vrabel48944732006-01-19 17:56:29 +0000200 if (priv->interruptTransmit < 0 || priv->interruptReceive < 0 || priv->interruptError < 0)
201 goto regs_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 } else {
203 priv->interruptTransmit = platform_get_irq(pdev, 0);
David Vrabel48944732006-01-19 17:56:29 +0000204 if (priv->interruptTransmit < 0)
205 goto regs_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 }
207
208 /* get a pointer to the register memory */
209 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600210 priv->regs = ioremap(r->start, sizeof (struct gfar));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400212 if (NULL == priv->regs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 err = -ENOMEM;
214 goto regs_fail;
215 }
216
Andy Flemingfef61082006-04-20 16:44:29 -0500217 spin_lock_init(&priv->txlock);
218 spin_lock_init(&priv->rxlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Russell King3ae5eae2005-11-09 22:32:44 +0000220 platform_set_drvdata(pdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
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
Russell King3ae5eae2005-11-09 22:32:44 +0000256 SET_NETDEV_DEV(dev, &pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
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;
Li Yang94e8cc32007-10-12 21:53:51 +0800263#ifdef CONFIG_GFAR_NAPI
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700264 netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT);
Li Yang94e8cc32007-10-12 21:53:51 +0800265#endif
Vitaly Woolf2d71c22006-11-07 13:27:02 +0300266#ifdef CONFIG_NET_POLL_CONTROLLER
267 dev->poll_controller = gfar_netpoll;
268#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 dev->stop = gfar_close;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 dev->change_mtu = gfar_change_mtu;
271 dev->mtu = 1500;
272 dev->set_multicast_list = gfar_set_multi;
273
Kumar Gala0bbaf062005-06-20 10:54:21 -0500274 dev->ethtool_ops = &gfar_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Kumar Gala0bbaf062005-06-20 10:54:21 -0500276 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Kumar Gala0bbaf062005-06-20 10:54:21 -0500282 priv->vlgrp = NULL;
283
284 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) {
285 dev->vlan_rx_register = gfar_vlan_rx_register;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500286
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
Kumar Gala0bbaf062005-06-20 10:54:21 -0500332 if (dev->features & NETIF_F_IP_CSUM)
333 dev->hard_header_len += GMAC_FCB_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335 priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 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
Kumar Gala0bbaf062005-06-20 10:54:21 -0500346 /* Enable most messages by default */
347 priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 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
Andy Fleming7f7f5312005-11-11 12:38:59 -0600357 /* Create all the sysfs files */
358 gfar_init_sysfs(dev);
359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 /* Print out the device info */
Joe Perches0795af52007-10-03 17:59:30 -0700361 printk(KERN_INFO DEVICE_NAME "%s\n",
362 dev->name, print_mac(mac, dev->dev_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364 /* Even more device info helps when determining which kernel */
Andy Fleming7f7f5312005-11-11 12:38:59 -0600365 /* provided which set of benchmarks. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366#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
376register_fail:
Kumar Galacc8c6e32006-02-01 15:18:03 -0600377 iounmap(priv->regs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378regs_fail:
379 free_netdev(dev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400380 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381}
382
Russell King3ae5eae2005-11-09 22:32:44 +0000383static int gfar_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
Russell King3ae5eae2005-11-09 22:32:44 +0000385 struct net_device *dev = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 struct gfar_private *priv = netdev_priv(dev);
387
Russell King3ae5eae2005-11-09 22:32:44 +0000388 platform_set_drvdata(pdev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Kumar Galacc8c6e32006-02-01 15:18:03 -0600390 iounmap(priv->regs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 free_netdev(dev);
392
393 return 0;
394}
395
396
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600397/* Reads the controller's registers to determine what interface
398 * connects it to the PHY.
399 */
400static 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;
Andy Fleming7132ab72007-07-11 11:43:07 -0500418 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
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600428 return PHY_INTERFACE_MODE_RGMII;
Andy Fleming7132ab72007-07-11 11:43:07 -0500429 }
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600430 }
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
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400439/* Initializes driver's PHY state, and attaches to the PHY.
440 * Returns 0 on success.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 */
442static int init_phy(struct net_device *dev)
443{
444 struct gfar_private *priv = netdev_priv(dev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400445 uint gigabit_support =
446 priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
447 SUPPORTED_1000baseT_Full : 0;
448 struct phy_device *phydev;
Kumar Gala4d3248a2006-01-11 11:27:33 -0800449 char phy_id[BUS_ID_SIZE];
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600450 phy_interface_t interface;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 priv->oldlink = 0;
453 priv->oldspeed = 0;
454 priv->oldduplex = -1;
455
Kumar Gala4d3248a2006-01-11 11:27:33 -0800456 snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, priv->einfo->bus_id, priv->einfo->phy_id);
457
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600458 interface = gfar_get_interface(dev);
459
460 phydev = phy_connect(dev, phy_id, &adjust_link, 0, interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Kapil Junejad3c12872007-05-11 18:25:11 -0500462 if (interface == PHY_INTERFACE_MODE_SGMII)
463 gfar_configure_serdes(dev);
464
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400465 if (IS_ERR(phydev)) {
466 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
467 return PTR_ERR(phydev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 }
469
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400470 /* Remove any features not supported by the controller */
471 phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
472 phydev->advertising = phydev->supported;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400474 priv->phydev = phydev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
476 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477}
478
Kapil Junejad3c12872007-05-11 18:25:11 -0500479static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500static 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 */
Kumar Gala0bbaf062005-06-20 10:54:21 -0500511 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 /* Zero out the rmon mib registers if it has them */
530 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
Kumar Galacc8c6e32006-02-01 15:18:03 -0600531 memset_io(&(priv->regs->rmon), 0, sizeof (struct rmon_mib));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 /* Initialize the Minimum Frame Length Register */
542 gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS);
543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 /* Assign the TBI an address which won't conflict with the PHYs */
545 gfar_write(&priv->regs->tbipa, TBIPA_VALUE);
546}
547
Kumar Gala0bbaf062005-06-20 10:54:21 -0500548
549/* Halt the receive and transmit queues */
550void gfar_halt(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551{
552 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600553 struct gfar __iomem *regs = priv->regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 u32 tempval;
555
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 /* Mask all interrupts */
557 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
558
559 /* Clear all interrupts */
560 gfar_write(&regs->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(&regs->maccfg1);
576 tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
577 gfar_write(&regs->maccfg1, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500578}
579
580void stop_gfar(struct net_device *dev)
581{
582 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600583 struct gfar __iomem *regs = priv->regs;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500584 unsigned long flags;
585
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400586 phy_stop(priv->phydev);
587
Kumar Gala0bbaf062005-06-20 10:54:21 -0500588 /* Lock it down */
Andy Flemingfef61082006-04-20 16:44:29 -0500589 spin_lock_irqsave(&priv->txlock, flags);
590 spin_lock(&priv->rxlock);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500591
Kumar Gala0bbaf062005-06-20 10:54:21 -0500592 gfar_halt(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
Andy Flemingfef61082006-04-20 16:44:29 -0500594 spin_unlock(&priv->rxlock);
595 spin_unlock_irqrestore(&priv->txlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
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 {
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400603 free_irq(priv->interruptTransmit, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 }
605
606 free_skb_resources(priv);
607
Becky Brucecf782292008-02-18 17:24:30 -0600608 dma_free_coherent(&dev->dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 sizeof(struct txbd8)*priv->tx_ring_size
610 + sizeof(struct rxbd8)*priv->rx_ring_size,
611 priv->tx_bd_base,
Kumar Gala0bbaf062005-06-20 10:54:21 -0500612 gfar_read(&regs->tbase0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613}
614
615/* If there are any tx skbs or rx skbs still around, free them.
616 * Then free tx_skbuff and rx_skbuff */
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400617static void free_skb_resources(struct gfar_private *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618{
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]) {
Becky Brucecf782292008-02-18 17:24:30 -0600629 dma_unmap_single(&priv->dev->dev, txbdp->bufPtr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 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]) {
Becky Brucecf782292008-02-18 17:24:30 -0600646 dma_unmap_single(&priv->dev->dev, rxbdp->bufPtr,
Andy Fleming7f7f5312005-11-11 12:38:59 -0600647 priv->rx_buffer_size,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 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
Kumar Gala0bbaf062005-06-20 10:54:21 -0500665void gfar_start(struct net_device *dev)
666{
667 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600668 struct gfar __iomem *regs = priv->regs;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500669 u32 tempval;
670
671 /* Enable Rx and Tx in MACCFG1 */
672 tempval = gfar_read(&regs->maccfg1);
673 tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
674 gfar_write(&regs->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
Kumar Gala0bbaf062005-06-20 10:54:21 -0500681 /* 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
Andy Flemingfef61082006-04-20 16:44:29 -0500686 /* Clear THLT/RHLT, so that the DMA starts polling now */
687 gfar_write(&regs->tstat, TSTAT_CLEAR_THALT);
688 gfar_write(&regs->rstat, RSTAT_CLEAR_RHALT);
689
Kumar Gala0bbaf062005-06-20 10:54:21 -0500690 /* Unmask the interrupts we look for */
691 gfar_write(&regs->imask, IMASK_DEFAULT);
692}
693
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694/* Bring the controller up and running */
695int startup_gfar(struct net_device *dev)
696{
697 struct txbd8 *txbdp;
698 struct rxbd8 *rxbdp;
Grant Likelyf9663ae2007-12-01 22:10:03 -0700699 dma_addr_t addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 unsigned long vaddr;
701 int i;
702 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600703 struct gfar __iomem *regs = priv->regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 int err = 0;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500705 u32 rctrl = 0;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600706 u32 attrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
708 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
709
710 /* Allocate memory for the buffer descriptors */
Becky Brucecf782292008-02-18 17:24:30 -0600711 vaddr = (unsigned long) dma_alloc_coherent(&dev->dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 sizeof (struct txbd8) * priv->tx_ring_size +
713 sizeof (struct rxbd8) * priv->rx_ring_size,
714 &addr, GFP_KERNEL);
715
716 if (vaddr == 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500717 if (netif_msg_ifup(priv))
718 printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n",
719 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 return -ENOMEM;
721 }
722
723 priv->tx_bd_base = (struct txbd8 *) vaddr;
724
725 /* enet DMA only understands physical addresses */
Kumar Gala0bbaf062005-06-20 10:54:21 -0500726 gfar_write(&regs->tbase0, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
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;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500732 gfar_write(&regs->rbase0, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
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
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400739 if (NULL == priv->tx_skbuff) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500740 if (netif_msg_ifup(priv))
741 printk(KERN_ERR "%s: Could not allocate tx_skbuff\n",
742 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 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
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400754 if (NULL == priv->rx_skbuff) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500755 if (netif_msg_ifup(priv))
756 printk(KERN_ERR "%s: Could not allocate rx_skbuff\n",
757 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 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) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500804 /* Install our interrupt handlers for Error,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 * Transmit, and Receive */
806 if (request_irq(priv->interruptError, gfar_error,
807 0, "enet_error", dev) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500808 if (netif_msg_intr(priv))
809 printk(KERN_ERR "%s: Can't get IRQ %d\n",
810 dev->name, priv->interruptError);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
812 err = -1;
813 goto err_irq_fail;
814 }
815
816 if (request_irq(priv->interruptTransmit, gfar_transmit,
817 0, "enet_tx", dev) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500818 if (netif_msg_intr(priv))
819 printk(KERN_ERR "%s: Can't get IRQ %d\n",
820 dev->name, priv->interruptTransmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
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) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500829 if (netif_msg_intr(priv))
830 printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n",
831 dev->name, priv->interruptReceive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
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) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500839 if (netif_msg_intr(priv))
840 printk(KERN_ERR "%s: Can't get IRQ %d\n",
841 dev->name, priv->interruptError);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
843 err = -1;
844 goto err_irq_fail;
845 }
846 }
847
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400848 phy_start(priv->phydev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
850 /* Configure the coalescing support */
851 if (priv->txcoalescing)
852 gfar_write(&regs->txic,
853 mk_ic_value(priv->txcount, priv->txtime));
854 else
855 gfar_write(&regs->txic, 0);
856
857 if (priv->rxcoalescing)
858 gfar_write(&regs->rxic,
859 mk_ic_value(priv->rxcount, priv->rxtime));
860 else
861 gfar_write(&regs->rxic, 0);
862
Kumar Gala0bbaf062005-06-20 10:54:21 -0500863 if (priv->rx_csum_enable)
864 rctrl |= RCTRL_CHECKSUMMING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865
Andy Fleming7f7f5312005-11-11 12:38:59 -0600866 if (priv->extended_hash) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500867 rctrl |= RCTRL_EXTHASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Andy Fleming7f7f5312005-11-11 12:38:59 -0600869 gfar_clear_exact_match(dev);
870 rctrl |= RCTRL_EMEN;
871 }
872
Kumar Gala0bbaf062005-06-20 10:54:21 -0500873 if (priv->vlan_enable)
874 rctrl |= RCTRL_VLAN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
Andy Fleming7f7f5312005-11-11 12:38:59 -0600876 if (priv->padding) {
877 rctrl &= ~RCTRL_PAL_MASK;
878 rctrl |= RCTRL_PADDING(priv->padding);
879 }
880
Kumar Gala0bbaf062005-06-20 10:54:21 -0500881 /* Init rctrl based on our settings */
882 gfar_write(&priv->regs->rctrl, rctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883
Kumar Gala0bbaf062005-06-20 10:54:21 -0500884 if (dev->features & NETIF_F_IP_CSUM)
885 gfar_write(&priv->regs->tctrl, TCTRL_INIT_CSUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
Andy Fleming7f7f5312005-11-11 12:38:59 -0600887 /* 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 */
Kumar Gala0bbaf062005-06-20 10:54:21 -0500910 gfar_start(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
912 return 0;
913
914rx_irq_fail:
915 free_irq(priv->interruptTransmit, dev);
916tx_irq_fail:
917 free_irq(priv->interruptError, dev);
918err_irq_fail:
919rx_skb_fail:
920 free_skb_resources(priv);
921tx_skb_fail:
Becky Brucecf782292008-02-18 17:24:30 -0600922 dma_free_coherent(&dev->dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 sizeof(struct txbd8)*priv->tx_ring_size
924 + sizeof(struct rxbd8)*priv->rx_ring_size,
925 priv->tx_bd_base,
Kumar Gala0bbaf062005-06-20 10:54:21 -0500926 gfar_read(&regs->tbase0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 return err;
929}
930
931/* Called when something needs to use the ethernet device */
932/* Returns 0 for success. */
933static int gfar_enet_open(struct net_device *dev)
934{
Li Yang293c8512007-10-15 23:01:12 +0800935#ifdef CONFIG_GFAR_NAPI
Li Yang94e8cc32007-10-12 21:53:51 +0800936 struct gfar_private *priv = netdev_priv(dev);
Li Yang293c8512007-10-15 23:01:12 +0800937#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 int err;
939
Li Yang293c8512007-10-15 23:01:12 +0800940#ifdef CONFIG_GFAR_NAPI
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700941 napi_enable(&priv->napi);
Li Yang293c8512007-10-15 23:01:12 +0800942#endif
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700943
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 /* Initialize a bunch of registers */
945 init_registers(dev);
946
947 gfar_set_mac_address(dev);
948
949 err = init_phy(dev);
950
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700951 if(err) {
Li Yang293c8512007-10-15 23:01:12 +0800952#ifdef CONFIG_GFAR_NAPI
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700953 napi_disable(&priv->napi);
Li Yang293c8512007-10-15 23:01:12 +0800954#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 return err;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700956 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
958 err = startup_gfar(dev);
Anton Vorontsovdb0e8e32007-10-17 23:57:46 +0400959 if (err) {
Li Yang293c8512007-10-15 23:01:12 +0800960#ifdef CONFIG_GFAR_NAPI
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700961 napi_disable(&priv->napi);
Li Yang293c8512007-10-15 23:01:12 +0800962#endif
Anton Vorontsovdb0e8e32007-10-17 23:57:46 +0400963 return err;
964 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965
966 netif_start_queue(dev);
967
968 return err;
969}
970
Andy Fleming7f7f5312005-11-11 12:38:59 -0600971static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb, struct txbd8 *bdp)
Kumar Gala0bbaf062005-06-20 10:54:21 -0500972{
973 struct txfcb *fcb = (struct txfcb *)skb_push (skb, GMAC_FCB_LEN);
974
975 memset(fcb, 0, GMAC_FCB_LEN);
976
Kumar Gala0bbaf062005-06-20 10:54:21 -0500977 return fcb;
978}
979
980static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb)
981{
Andy Fleming7f7f5312005-11-11 12:38:59 -0600982 u8 flags = 0;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500983
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 */
Andy Fleming7f7f5312005-11-11 12:38:59 -0600988 flags = TXFCB_DEFAULT;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500989
Andy Fleming7f7f5312005-11-11 12:38:59 -0600990 /* Tell the controller what the protocol is */
991 /* And provide the already calculated phcs */
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700992 if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
Andy Fleming7f7f5312005-11-11 12:38:59 -0600993 flags |= TXFCB_UDP;
Arnaldo Carvalho de Melo4bedb452007-03-13 14:28:48 -0300994 fcb->phcs = udp_hdr(skb)->check;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600995 } else
Kumar Gala8da32de2007-06-29 00:12:04 -0500996 fcb->phcs = tcp_hdr(skb)->check;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500997
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 */
Arnaldo Carvalho de Melobbe735e2007-03-10 22:16:10 -03001002 fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN);
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -03001003 fcb->l4os = skb_network_header_len(skb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001004
Andy Fleming7f7f5312005-11-11 12:38:59 -06001005 fcb->flags = flags;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001006}
1007
Andy Fleming7f7f5312005-11-11 12:38:59 -06001008void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001009{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001010 fcb->flags |= TXFCB_VLN;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001011 fcb->vlctl = vlan_tx_tag_get(skb);
1012}
1013
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014/* 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 */
1016static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
1017{
1018 struct gfar_private *priv = netdev_priv(dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001019 struct txfcb *fcb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 struct txbd8 *txbdp;
Andy Fleming7f7f5312005-11-11 12:38:59 -06001021 u16 status;
Andy Flemingfef61082006-04-20 16:44:29 -05001022 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
1024 /* Update transmit stats */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001025 dev->stats.tx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026
1027 /* Lock priv now */
Andy Flemingfef61082006-04-20 16:44:29 -05001028 spin_lock_irqsave(&priv->txlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
1030 /* Point at the first free tx descriptor */
1031 txbdp = priv->cur_tx;
1032
1033 /* Clear all but the WRAP status flags */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001034 status = txbdp->status & TXBD_WRAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035
Kumar Gala0bbaf062005-06-20 10:54:21 -05001036 /* Set up checksumming */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001037 if (likely((dev->features & NETIF_F_IP_CSUM)
Patrick McHardy84fa7932006-08-29 16:44:56 -07001038 && (CHECKSUM_PARTIAL == skb->ip_summed))) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001039 fcb = gfar_add_fcb(skb, txbdp);
Andy Fleming7f7f5312005-11-11 12:38:59 -06001040 status |= TXBD_TOE;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001041 gfar_tx_checksum(skb, fcb);
1042 }
1043
1044 if (priv->vlan_enable &&
1045 unlikely(priv->vlgrp && vlan_tx_tag_present(skb))) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06001046 if (unlikely(NULL == fcb)) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001047 fcb = gfar_add_fcb(skb, txbdp);
Andy Fleming7f7f5312005-11-11 12:38:59 -06001048 status |= TXBD_TOE;
1049 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05001050
1051 gfar_tx_vlan(skb, fcb);
1052 }
1053
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 /* Set buffer length and pointer */
1055 txbdp->length = skb->len;
Becky Brucecf782292008-02-18 17:24:30 -06001056 txbdp->bufPtr = dma_map_single(&dev->dev, skb->data,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 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 */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001067 status |= TXBD_INTERRUPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
1069 /* Flag the BD as ready to go, last in frame, and */
1070 /* in need of CRC */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001071 status |= (TXBD_READY | TXBD_LAST | TXBD_CRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
1073 dev->trans_start = jiffies;
1074
Scott Wood3b6330c2007-05-16 15:06:59 -05001075 /* 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();
Andy Fleming7f7f5312005-11-11 12:38:59 -06001084 txbdp->status = status;
1085
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 /* 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
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001098 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 }
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 */
Andy Flemingfef61082006-04-20 16:44:29 -05001108 spin_unlock_irqrestore(&priv->txlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109
1110 return 0;
1111}
1112
1113/* Stops the kernel queue, and halts the controller */
1114static int gfar_close(struct net_device *dev)
1115{
1116 struct gfar_private *priv = netdev_priv(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001117
Li Yang293c8512007-10-15 23:01:12 +08001118#ifdef CONFIG_GFAR_NAPI
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001119 napi_disable(&priv->napi);
Li Yang293c8512007-10-15 23:01:12 +08001120#endif
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001121
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 stop_gfar(dev);
1123
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001124 /* Disconnect from the PHY */
1125 phy_disconnect(priv->phydev);
1126 priv->phydev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
1128 netif_stop_queue(dev);
1129
1130 return 0;
1131}
1132
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133/* Changes the mac address if the controller is not running. */
1134int gfar_set_mac_address(struct net_device *dev)
1135{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001136 gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137
1138 return 0;
1139}
1140
1141
Kumar Gala0bbaf062005-06-20 10:54:21 -05001142/* Enables and disables VLAN insertion/extraction */
1143static 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
Andy Flemingfef61082006-04-20 16:44:29 -05001150 spin_lock_irqsave(&priv->rxlock, flags);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001151
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);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001160
Kumar Gala0bbaf062005-06-20 10:54:21 -05001161 /* 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
Andy Flemingfef61082006-04-20 16:44:29 -05001177 spin_unlock_irqrestore(&priv->rxlock, flags);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001178}
1179
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180static 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;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001185 int frame_size = new_mtu + ETH_HLEN;
1186
1187 if (priv->vlan_enable)
Dai Harukifaa89572008-03-24 10:53:26 -05001188 frame_size += VLAN_HLEN;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001189
1190 if (gfar_uses_fcb(priv))
1191 frame_size += GMAC_FCB_LEN;
1192
1193 frame_size += priv->padding;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
1195 if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001196 if (netif_msg_drv(priv))
1197 printk(KERN_ERR "%s: Invalid MTU setting\n",
1198 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 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
Andy Fleming7f7f5312005-11-11 12:38:59 -06001207 * stopped, and we changed something */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 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. */
1240static void gfar_timeout(struct net_device *dev)
1241{
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001242 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
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 */
Dai Harukid080cd62008-04-09 19:37:51 -05001253int gfar_clean_tx_ring(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 struct txbd8 *bdp;
Dai Harukid080cd62008-04-09 19:37:51 -05001256 struct gfar_private *priv = netdev_priv(dev);
1257 int howmany = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 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
Dai Harukid080cd62008-04-09 19:37:51 -05001267 howmany++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
1269 /* Deferred means some collisions occurred during transmit, */
1270 /* but we eventually sent the packet. */
1271 if (bdp->status & TXBD_DEF)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001272 dev->stats.collisions++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273
1274 /* Free the sk buffer associated with this TxBD */
1275 dev_kfree_skb_irq(priv->tx_skbuff[priv->skb_dirtytx]);
Dai Harukid080cd62008-04-09 19:37:51 -05001276
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 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
Dai Harukid080cd62008-04-09 19:37:51 -05001282 /* Clean BD length for empty detection */
1283 bdp->length = 0;
1284
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 /* 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
Dai Harukid080cd62008-04-09 19:37:51 -05001299 dev->stats.tx_packets += howmany;
1300
1301 return howmany;
1302}
1303
1304/* Interrupt Handler for Transmit complete */
1305static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 /* If we are coalescing the interrupts, reset the timer */
1319 /* Otherwise, clear it */
Andy Fleming2f448912008-03-24 10:53:28 -05001320 if (likely(priv->txcoalescing)) {
1321 gfar_write(&priv->regs->txic, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 gfar_write(&priv->regs->txic,
1323 mk_ic_value(priv->txcount, priv->txtime));
Andy Fleming2f448912008-03-24 10:53:28 -05001324 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325
Andy Flemingfef61082006-04-20 16:44:29 -05001326 spin_unlock(&priv->txlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327
1328 return IRQ_HANDLED;
1329}
1330
1331struct sk_buff * gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp)
1332{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001333 unsigned int alignamount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 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
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001342 if (NULL == skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 return NULL;
1344
Andy Fleming7f7f5312005-11-11 12:38:59 -06001345 alignamount = RXBUF_ALIGNMENT -
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001346 (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1));
Andy Fleming7f7f5312005-11-11 12:38:59 -06001347
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 /* We need the data buffer to be aligned properly. We will reserve
1349 * as many bytes as needed to align the data properly
1350 */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001351 skb_reserve(skb, alignamount);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352
Becky Brucecf782292008-02-18 17:24:30 -06001353 bdp->bufPtr = dma_map_single(&dev->dev, skb->data,
Andy Fleming7f7f5312005-11-11 12:38:59 -06001354 priv->rx_buffer_size, DMA_FROM_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355
1356 bdp->length = 0;
1357
1358 /* Mark the buffer empty */
Scott Wood3b6330c2007-05-16 15:06:59 -05001359 eieio();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 bdp->status |= (RXBD_EMPTY | RXBD_INTERRUPT);
1361
1362 return skb;
1363}
1364
Li Yang298e1a92007-10-16 14:18:13 +08001365static inline void count_errors(unsigned short status, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366{
Li Yang298e1a92007-10-16 14:18:13 +08001367 struct gfar_private *priv = netdev_priv(dev);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001368 struct net_device_stats *stats = &dev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 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
David Howells7d12e782006-10-05 14:55:46 +01001403irqreturn_t gfar_receive(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404{
1405 struct net_device *dev = (struct net_device *) dev_id;
1406 struct gfar_private *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407#ifdef CONFIG_GFAR_NAPI
1408 u32 tempval;
Andy Flemingfef61082006-04-20 16:44:29 -05001409#else
1410 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411#endif
1412
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 /* support NAPI */
1414#ifdef CONFIG_GFAR_NAPI
Dai Harukid080cd62008-04-09 19:37:51 -05001415 /* 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
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001419 if (netif_rx_schedule_prep(dev, &priv->napi)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 tempval = gfar_read(&priv->regs->imask);
Dai Harukid080cd62008-04-09 19:37:51 -05001421 tempval &= IMASK_RTX_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 gfar_write(&priv->regs->imask, tempval);
1423
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001424 __netif_rx_schedule(dev, &priv->napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 } else {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001426 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));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 }
1431#else
Dai Harukid080cd62008-04-09 19:37:51 -05001432 /* Clear IEVENT, so rx interrupt isn't called again
1433 * because of this interrupt */
1434 gfar_write(&priv->regs->ievent, IEVENT_RX_MASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
Andy Flemingfef61082006-04-20 16:44:29 -05001436 spin_lock_irqsave(&priv->rxlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 gfar_clean_rx_ring(dev, priv->rx_ring_size);
1438
1439 /* If we are coalescing interrupts, update the timer */
1440 /* Otherwise, clear it */
Andy Fleming2f448912008-03-24 10:53:28 -05001441 if (likely(priv->rxcoalescing)) {
1442 gfar_write(&priv->regs->rxic, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 gfar_write(&priv->regs->rxic,
1444 mk_ic_value(priv->rxcount, priv->rxtime));
Andy Fleming2f448912008-03-24 10:53:28 -05001445 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
Andy Flemingfef61082006-04-20 16:44:29 -05001447 spin_unlock_irqrestore(&priv->rxlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448#endif
1449
1450 return IRQ_HANDLED;
1451}
1452
Kumar Gala0bbaf062005-06-20 10:54:21 -05001453static 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
1463static 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 */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001468 if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU))
Kumar Gala0bbaf062005-06-20 10:54:21 -05001469 skb->ip_summed = CHECKSUM_UNNECESSARY;
1470 else
1471 skb->ip_summed = CHECKSUM_NONE;
1472}
1473
1474
1475static 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484
1485/* gfar_process_frame() -- handle one incoming packet if skb
1486 * isn't NULL. */
1487static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
1488 int length)
1489{
1490 struct gfar_private *priv = netdev_priv(dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001491 struct rxfcb *fcb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001493 if (NULL == skb) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001494 if (netif_msg_rx_err(priv))
1495 printk(KERN_WARNING "%s: Missing skb!!.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001496 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 priv->extra_stats.rx_skbmissing++;
1498 } else {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001499 int ret;
1500
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501 /* Prep the skb for the packet */
1502 skb_put(skb, length);
1503
Kumar Gala0bbaf062005-06-20 10:54:21 -05001504 /* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 /* 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 */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001519 if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN)))
Kumar Gala0bbaf062005-06-20 10:54:21 -05001520 ret = gfar_rx_vlan(skb, priv->vlgrp, fcb->vlctl);
1521 else
1522 ret = RECEIVE(skb);
1523
1524 if (NET_RX_DROP == ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525 priv->extra_stats.kernel_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 }
1527
1528 return 0;
1529}
1530
1531/* gfar_clean_rx_ring() -- Processes each frame in the rx ring
Kumar Gala0bbaf062005-06-20 10:54:21 -05001532 * until the budget/quota has been reached. Returns the number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 * of frames handled
1534 */
Kumar Gala0bbaf062005-06-20 10:54:21 -05001535int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536{
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))) {
Scott Wood3b6330c2007-05-16 15:06:59 -05001547 rmb();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 skb = priv->rx_skbuff[priv->skb_currx];
1549
Andy Fleming99da5002008-03-24 10:53:27 -05001550 if ((bdp->status & RXBD_LAST) && !(bdp->status & RXBD_ERR)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 /* Increment the number of packets */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001552 dev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553 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
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001560 dev->stats.rx_bytes += pkt_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561 } else {
Li Yang298e1a92007-10-16 14:18:13 +08001562 count_errors(bdp->status, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 return howmany;
1596}
1597
1598#ifdef CONFIG_GFAR_NAPI
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001599static int gfar_poll(struct napi_struct *napi, int budget)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001601 struct gfar_private *priv = container_of(napi, struct gfar_private, napi);
1602 struct net_device *dev = priv->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 int howmany;
Dai Harukid080cd62008-04-09 19:37:51 -05001604 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001612 howmany = gfar_clean_rx_ring(dev, budget);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001614 if (howmany < budget) {
1615 netif_rx_complete(dev, napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
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 */
Andy Fleming2f448912008-03-24 10:53:28 -05001624 if (likely(priv->rxcoalescing)) {
1625 gfar_write(&priv->regs->rxic, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 gfar_write(&priv->regs->rxic,
1627 mk_ic_value(priv->rxcount, priv->rxtime));
Andy Fleming2f448912008-03-24 10:53:28 -05001628 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 }
1630
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001631 return howmany;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632}
1633#endif
1634
Vitaly Woolf2d71c22006-11-07 13:27:02 +03001635#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 */
1641static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662/* The interrupt handler for devices with one interrupt */
David Howells7d12e782006-10-05 14:55:46 +01001663static irqreturn_t gfar_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664{
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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671 /* Check for reception */
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001672 if (events & IEVENT_RX_MASK)
David Howells7d12e782006-10-05 14:55:46 +01001673 gfar_receive(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674
1675 /* Check for transmit completion */
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001676 if (events & IEVENT_TX_MASK)
David Howells7d12e782006-10-05 14:55:46 +01001677 gfar_transmit(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001679 /* Check for errors */
1680 if (events & IEVENT_ERR_MASK)
1681 gfar_error(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682
1683 return IRQ_HANDLED;
1684}
1685
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686/* Called every time the controller might need to be made
1687 * aware of new link state. The PHY code conveys this
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001688 * information through variables in the phydev structure, and this
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 * function converts those variables into the appropriate
1690 * register values, and can bring down the device if needed.
1691 */
1692static void adjust_link(struct net_device *dev)
1693{
1694 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -06001695 struct gfar __iomem *regs = priv->regs;
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001696 unsigned long flags;
1697 struct phy_device *phydev = priv->phydev;
1698 int new_state = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699
Andy Flemingfef61082006-04-20 16:44:29 -05001700 spin_lock_irqsave(&priv->txlock, flags);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001701 if (phydev->link) {
1702 u32 tempval = gfar_read(&regs->maccfg2);
Andy Fleming7f7f5312005-11-11 12:38:59 -06001703 u32 ecntrl = gfar_read(&regs->ecntrl);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001704
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705 /* Now we make sure that we can be in full duplex mode.
1706 * If not, we operate in half-duplex mode. */
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001707 if (phydev->duplex != priv->oldduplex) {
1708 new_state = 1;
1709 if (!(phydev->duplex))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 tempval &= ~(MACCFG2_FULL_DUPLEX);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001711 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712 tempval |= MACCFG2_FULL_DUPLEX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001714 priv->oldduplex = phydev->duplex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 }
1716
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001717 if (phydev->speed != priv->oldspeed) {
1718 new_state = 1;
1719 switch (phydev->speed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 case 1000:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 tempval =
1722 ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 break;
1724 case 100:
1725 case 10:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 tempval =
1727 ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
Andy Fleming7f7f5312005-11-11 12:38:59 -06001728
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735 break;
1736 default:
Kumar Gala0bbaf062005-06-20 10:54:21 -05001737 if (netif_msg_link(priv))
1738 printk(KERN_WARNING
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001739 "%s: Ack! Speed (%d) is not 10/100/1000!\n",
1740 dev->name, phydev->speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741 break;
1742 }
1743
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001744 priv->oldspeed = phydev->speed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 }
1746
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001747 gfar_write(&regs->maccfg2, tempval);
Andy Fleming7f7f5312005-11-11 12:38:59 -06001748 gfar_write(&regs->ecntrl, ecntrl);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001749
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750 if (!priv->oldlink) {
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001751 new_state = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752 priv->oldlink = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 netif_schedule(dev);
1754 }
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001755 } else if (priv->oldlink) {
1756 new_state = 1;
1757 priv->oldlink = 0;
1758 priv->oldspeed = 0;
1759 priv->oldduplex = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001762 if (new_state && netif_msg_link(priv))
1763 phy_print_status(phydev);
1764
Andy Flemingfef61082006-04-20 16:44:29 -05001765 spin_unlock_irqrestore(&priv->txlock, flags);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001766}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767
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 */
1772static void gfar_set_multi(struct net_device *dev)
1773{
1774 struct dev_mc_list *mc_ptr;
1775 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -06001776 struct gfar __iomem *regs = priv->regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 u32 tempval;
1778
1779 if(dev->flags & IFF_PROMISC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780 /* Set RCTRL to PROM */
1781 tempval = gfar_read(&regs->rctrl);
1782 tempval |= RCTRL_PROM;
1783 gfar_write(&regs->rctrl, tempval);
1784 } else {
1785 /* Set RCTRL to not PROM */
1786 tempval = gfar_read(&regs->rctrl);
1787 tempval &= ~(RCTRL_PROM);
1788 gfar_write(&regs->rctrl, tempval);
1789 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001790
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791 if(dev->flags & IFF_ALLMULTI) {
1792 /* Set the hash to rx all multicast frames */
Kumar Gala0bbaf062005-06-20 10:54:21 -05001793 gfar_write(&regs->igaddr0, 0xffffffff);
1794 gfar_write(&regs->igaddr1, 0xffffffff);
1795 gfar_write(&regs->igaddr2, 0xffffffff);
1796 gfar_write(&regs->igaddr3, 0xffffffff);
1797 gfar_write(&regs->igaddr4, 0xffffffff);
1798 gfar_write(&regs->igaddr5, 0xffffffff);
1799 gfar_write(&regs->igaddr6, 0xffffffff);
1800 gfar_write(&regs->igaddr7, 0xffffffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801 gfar_write(&regs->gaddr0, 0xffffffff);
1802 gfar_write(&regs->gaddr1, 0xffffffff);
1803 gfar_write(&regs->gaddr2, 0xffffffff);
1804 gfar_write(&regs->gaddr3, 0xffffffff);
1805 gfar_write(&regs->gaddr4, 0xffffffff);
1806 gfar_write(&regs->gaddr5, 0xffffffff);
1807 gfar_write(&regs->gaddr6, 0xffffffff);
1808 gfar_write(&regs->gaddr7, 0xffffffff);
1809 } else {
Andy Fleming7f7f5312005-11-11 12:38:59 -06001810 int em_num;
1811 int idx;
1812
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813 /* zero out the hash */
Kumar Gala0bbaf062005-06-20 10:54:21 -05001814 gfar_write(&regs->igaddr0, 0x0);
1815 gfar_write(&regs->igaddr1, 0x0);
1816 gfar_write(&regs->igaddr2, 0x0);
1817 gfar_write(&regs->igaddr3, 0x0);
1818 gfar_write(&regs->igaddr4, 0x0);
1819 gfar_write(&regs->igaddr5, 0x0);
1820 gfar_write(&regs->igaddr6, 0x0);
1821 gfar_write(&regs->igaddr7, 0x0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822 gfar_write(&regs->gaddr0, 0x0);
1823 gfar_write(&regs->gaddr1, 0x0);
1824 gfar_write(&regs->gaddr2, 0x0);
1825 gfar_write(&regs->gaddr3, 0x0);
1826 gfar_write(&regs->gaddr4, 0x0);
1827 gfar_write(&regs->gaddr5, 0x0);
1828 gfar_write(&regs->gaddr6, 0x0);
1829 gfar_write(&regs->gaddr7, 0x0);
1830
Andy Fleming7f7f5312005-11-11 12:38:59 -06001831 /* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 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) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06001848 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 }
1855 }
1856
1857 return;
1858}
1859
Andy Fleming7f7f5312005-11-11 12:38:59 -06001860
1861/* Clears each of the exact match registers to zero, so they
1862 * don't interfere with normal reception */
1863static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872/* 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. */
1885static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
1886{
1887 u32 tempval;
1888 struct gfar_private *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 u32 result = ether_crc(MAC_ADDR_LEN, addr);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001890 int width = priv->hash_width;
1891 u8 whichbit = (result >> (32 - width)) & 0x1f;
1892 u8 whichreg = result >> (32 - width + 5);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 u32 value = (1 << (31-whichbit));
1894
Kumar Gala0bbaf062005-06-20 10:54:21 -05001895 tempval = gfar_read(priv->hash_regs[whichreg]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 tempval |= value;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001897 gfar_write(priv->hash_regs[whichreg], tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898
1899 return;
1900}
1901
Andy Fleming7f7f5312005-11-11 12:38:59 -06001902
1903/* There are multiple MAC Address register pairs on some controllers
1904 * This function sets the numth pair to a given address
1905 */
1906static 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;
Kumar Galacc8c6e32006-02-01 15:18:03 -06001912 u32 __iomem *macptr = &priv->regs->macstnaddr1;
Andy Fleming7f7f5312005-11-11 12:38:59 -06001913
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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928/* GFAR error interrupt handler */
David Howells7d12e782006-10-05 14:55:46 +01001929static irqreturn_t gfar_error(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930{
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... */
Kumar Gala0bbaf062005-06-20 10:54:21 -05001941 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",
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001943 dev->name, events, gfar_read(&priv->regs->imask));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944
1945 /* Update the error counters */
1946 if (events & IEVENT_TXE) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001947 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948
1949 if (events & IEVENT_LC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001950 dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 if (events & IEVENT_CRL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001952 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 if (events & IEVENT_XFUN) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001954 if (netif_msg_tx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001955 printk(KERN_DEBUG "%s: TX FIFO underrun, "
1956 "packet dropped.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001957 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958 priv->extra_stats.tx_underrun++;
1959
1960 /* Reactivate the Tx Queues */
1961 gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
1962 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05001963 if (netif_msg_tx_err(priv))
1964 printk(KERN_DEBUG "%s: Transmit Error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 }
1966 if (events & IEVENT_BSY) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001967 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968 priv->extra_stats.rx_bsy++;
1969
David Howells7d12e782006-10-05 14:55:46 +01001970 gfar_receive(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971
1972#ifndef CONFIG_GFAR_NAPI
1973 /* Clear the halt bit in RSTAT */
1974 gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
1975#endif
1976
Kumar Gala0bbaf062005-06-20 10:54:21 -05001977 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001978 printk(KERN_DEBUG "%s: busy error (rstat: %x)\n",
1979 dev->name, gfar_read(&priv->regs->rstat));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 }
1981 if (events & IEVENT_BABR) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001982 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 priv->extra_stats.rx_babr++;
1984
Kumar Gala0bbaf062005-06-20 10:54:21 -05001985 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001986 printk(KERN_DEBUG "%s: babbling RX error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 }
1988 if (events & IEVENT_EBERR) {
1989 priv->extra_stats.eberr++;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001990 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001991 printk(KERN_DEBUG "%s: bus error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05001993 if ((events & IEVENT_RXC) && netif_msg_rx_status(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001994 printk(KERN_DEBUG "%s: control frame\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001995
1996 if (events & IEVENT_BABT) {
1997 priv->extra_stats.tx_babt++;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001998 if (netif_msg_tx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001999 printk(KERN_DEBUG "%s: babbling TX error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000 }
2001 return IRQ_HANDLED;
2002}
2003
2004/* Structure for a device driver */
Russell King3ae5eae2005-11-09 22:32:44 +00002005static struct platform_driver gfar_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006 .probe = gfar_probe,
2007 .remove = gfar_remove,
Russell King3ae5eae2005-11-09 22:32:44 +00002008 .driver = {
2009 .name = "fsl-gianfar",
2010 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011};
2012
2013static int __init gfar_init(void)
2014{
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002015 int err = gfar_mdio_init();
2016
2017 if (err)
2018 return err;
2019
Russell King3ae5eae2005-11-09 22:32:44 +00002020 err = platform_driver_register(&gfar_driver);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002021
2022 if (err)
2023 gfar_mdio_exit();
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002024
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002025 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026}
2027
2028static void __exit gfar_exit(void)
2029{
Russell King3ae5eae2005-11-09 22:32:44 +00002030 platform_driver_unregister(&gfar_driver);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002031 gfar_mdio_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032}
2033
2034module_init(gfar_init);
2035module_exit(gfar_exit);
2036