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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 *
Andy Flemingb31a1d82008-12-16 15:29:15 -080028 * The driver is initialized through of_device. Configuration information
29 * is therefore conveyed through an OF-style device tree.
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 *
31 * The Gianfar Ethernet Controller uses a ring of buffer
32 * descriptors. The beginning is indicated by a register
Kumar Gala0bbaf062005-06-20 10:54:21 -050033 * pointing to the physical address of the start of the ring.
34 * The end is determined by a "wrap" bit being set in the
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 * last descriptor of the ring.
36 *
37 * When a packet is received, the RXF bit in the
Kumar Gala0bbaf062005-06-20 10:54:21 -050038 * IEVENT register is set, triggering an interrupt when the
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 * corresponding bit in the IMASK register is also set (if
40 * interrupt coalescing is active, then the interrupt may not
41 * happen immediately, but will wait until either a set number
Andy Flemingbb40dcb2005-09-23 22:54:21 -040042 * of frames or amount of time have passed). In NAPI, the
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 * interrupt handler will signal there is work to be done, and
Francois Romieu0aa15382008-07-11 00:33:52 +020044 * exit. This method will start at the last known empty
Kumar Gala0bbaf062005-06-20 10:54:21 -050045 * descriptor, and process every subsequent descriptor until there
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * are none left with data (NAPI will stop after a set number of
47 * packets to give time to other tasks, but will eventually
48 * process all the packets). The data arrives inside a
49 * pre-allocated skb, and so after the skb is passed up to the
50 * stack, a new skb must be allocated, and the address field in
51 * the buffer descriptor must be updated to indicate this new
52 * skb.
53 *
54 * When the kernel requests that a packet be transmitted, the
55 * driver starts where it left off last time, and points the
56 * descriptor at the buffer which was passed in. The driver
57 * then informs the DMA engine that there are packets ready to
58 * be transmitted. Once the controller is finished transmitting
59 * the packet, an interrupt may be triggered (under the same
60 * conditions as for reception, but depending on the TXF bit).
61 * The driver then cleans up the buffer.
62 */
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#include <linux/string.h>
66#include <linux/errno.h>
Andy Flemingbb40dcb2005-09-23 22:54:21 -040067#include <linux/unistd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#include <linux/slab.h>
69#include <linux/interrupt.h>
70#include <linux/init.h>
71#include <linux/delay.h>
72#include <linux/netdevice.h>
73#include <linux/etherdevice.h>
74#include <linux/skbuff.h>
Kumar Gala0bbaf062005-06-20 10:54:21 -050075#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#include <linux/spinlock.h>
77#include <linux/mm.h>
Andy Flemingb31a1d82008-12-16 15:29:15 -080078#include <linux/of_platform.h>
Kumar Gala0bbaf062005-06-20 10:54:21 -050079#include <linux/ip.h>
80#include <linux/tcp.h>
81#include <linux/udp.h>
Kumar Gala9c07b8842006-01-11 11:26:25 -080082#include <linux/in.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84#include <asm/io.h>
85#include <asm/irq.h>
86#include <asm/uaccess.h>
87#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070088#include <linux/dma-mapping.h>
89#include <linux/crc32.h>
Andy Flemingbb40dcb2005-09-23 22:54:21 -040090#include <linux/mii.h>
91#include <linux/phy.h>
Andy Flemingb31a1d82008-12-16 15:29:15 -080092#include <linux/phy_fixed.h>
93#include <linux/of.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95#include "gianfar.h"
Andy Flemingbb40dcb2005-09-23 22:54:21 -040096#include "gianfar_mii.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98#define TX_TIMEOUT (1*HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#undef BRIEF_GFAR_ERRORS
100#undef VERBOSE_GFAR_ERRORS
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102const char gfar_driver_name[] = "Gianfar Ethernet";
Andy Fleming7f7f5312005-11-11 12:38:59 -0600103const char gfar_driver_version[] = "1.3";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105static int gfar_enet_open(struct net_device *dev);
106static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
Sebastian Siewiorab939902008-08-19 21:12:45 +0200107static void gfar_reset_task(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108static void gfar_timeout(struct net_device *dev);
109static int gfar_close(struct net_device *dev);
Andy Fleming815b97c2008-04-22 17:18:29 -0500110struct sk_buff *gfar_new_skb(struct net_device *dev);
111static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp,
112 struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113static int gfar_set_mac_address(struct net_device *dev);
114static int gfar_change_mtu(struct net_device *dev, int new_mtu);
David Howells7d12e782006-10-05 14:55:46 +0100115static irqreturn_t gfar_error(int irq, void *dev_id);
116static irqreturn_t gfar_transmit(int irq, void *dev_id);
117static irqreturn_t gfar_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118static void adjust_link(struct net_device *dev);
119static void init_registers(struct net_device *dev);
120static int init_phy(struct net_device *dev);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800121static int gfar_probe(struct of_device *ofdev,
122 const struct of_device_id *match);
123static int gfar_remove(struct of_device *ofdev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400124static void free_skb_resources(struct gfar_private *priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125static void gfar_set_multi(struct net_device *dev);
126static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
Kapil Junejad3c12872007-05-11 18:25:11 -0500127static void gfar_configure_serdes(struct net_device *dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700128static int gfar_poll(struct napi_struct *napi, int budget);
Vitaly Woolf2d71c22006-11-07 13:27:02 +0300129#ifdef CONFIG_NET_POLL_CONTROLLER
130static void gfar_netpoll(struct net_device *dev);
131#endif
Kumar Gala0bbaf062005-06-20 10:54:21 -0500132int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
Andy Flemingf162b9d2008-05-02 13:00:30 -0500133static int gfar_clean_tx_ring(struct net_device *dev);
Dai Haruki2c2db482008-12-16 15:31:15 -0800134static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
135 int amount_pull);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500136static void gfar_vlan_rx_register(struct net_device *netdev,
137 struct vlan_group *grp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600138void gfar_halt(struct net_device *dev);
Scott Woodd87eb122008-07-11 18:04:45 -0500139static void gfar_halt_nodisable(struct net_device *dev);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600140void gfar_start(struct net_device *dev);
141static void gfar_clear_exact_match(struct net_device *dev);
142static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Jeff Garzik7282d492006-09-13 14:30:00 -0400144extern const struct ethtool_ops gfar_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146MODULE_AUTHOR("Freescale Semiconductor, Inc");
147MODULE_DESCRIPTION("Gianfar Ethernet Driver");
148MODULE_LICENSE("GPL");
149
Andy Fleming7f7f5312005-11-11 12:38:59 -0600150/* Returns 1 if incoming frames use an FCB */
151static inline int gfar_uses_fcb(struct gfar_private *priv)
Kumar Gala0bbaf062005-06-20 10:54:21 -0500152{
Dai Haruki77ecaf22008-12-16 15:30:48 -0800153 return priv->vlgrp || priv->rx_csum_enable;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500154}
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400155
Andy Flemingb31a1d82008-12-16 15:29:15 -0800156static int gfar_of_init(struct net_device *dev)
157{
158 struct device_node *phy, *mdio;
159 const unsigned int *id;
160 const char *model;
161 const char *ctype;
162 const void *mac_addr;
163 const phandle *ph;
164 u64 addr, size;
165 int err = 0;
166 struct gfar_private *priv = netdev_priv(dev);
167 struct device_node *np = priv->node;
168 char bus_name[MII_BUS_ID_SIZE];
169
170 if (!np || !of_device_is_available(np))
171 return -ENODEV;
172
173 /* get a pointer to the register memory */
174 addr = of_translate_address(np, of_get_address(np, 0, &size, NULL));
175 priv->regs = ioremap(addr, size);
176
177 if (priv->regs == NULL)
178 return -ENOMEM;
179
180 priv->interruptTransmit = irq_of_parse_and_map(np, 0);
181
182 model = of_get_property(np, "model", NULL);
183
184 /* If we aren't the FEC we have multiple interrupts */
185 if (model && strcasecmp(model, "FEC")) {
186 priv->interruptReceive = irq_of_parse_and_map(np, 1);
187
188 priv->interruptError = irq_of_parse_and_map(np, 2);
189
190 if (priv->interruptTransmit < 0 ||
191 priv->interruptReceive < 0 ||
192 priv->interruptError < 0) {
193 err = -EINVAL;
194 goto err_out;
195 }
196 }
197
198 mac_addr = of_get_mac_address(np);
199 if (mac_addr)
200 memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN);
201
202 if (model && !strcasecmp(model, "TSEC"))
203 priv->device_flags =
204 FSL_GIANFAR_DEV_HAS_GIGABIT |
205 FSL_GIANFAR_DEV_HAS_COALESCE |
206 FSL_GIANFAR_DEV_HAS_RMON |
207 FSL_GIANFAR_DEV_HAS_MULTI_INTR;
208 if (model && !strcasecmp(model, "eTSEC"))
209 priv->device_flags =
210 FSL_GIANFAR_DEV_HAS_GIGABIT |
211 FSL_GIANFAR_DEV_HAS_COALESCE |
212 FSL_GIANFAR_DEV_HAS_RMON |
213 FSL_GIANFAR_DEV_HAS_MULTI_INTR |
Dai Haruki2c2db482008-12-16 15:31:15 -0800214 FSL_GIANFAR_DEV_HAS_PADDING |
Andy Flemingb31a1d82008-12-16 15:29:15 -0800215 FSL_GIANFAR_DEV_HAS_CSUM |
216 FSL_GIANFAR_DEV_HAS_VLAN |
217 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET |
218 FSL_GIANFAR_DEV_HAS_EXTENDED_HASH;
219
220 ctype = of_get_property(np, "phy-connection-type", NULL);
221
222 /* We only care about rgmii-id. The rest are autodetected */
223 if (ctype && !strcmp(ctype, "rgmii-id"))
224 priv->interface = PHY_INTERFACE_MODE_RGMII_ID;
225 else
226 priv->interface = PHY_INTERFACE_MODE_MII;
227
228 if (of_get_property(np, "fsl,magic-packet", NULL))
229 priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET;
230
231 ph = of_get_property(np, "phy-handle", NULL);
232 if (ph == NULL) {
233 u32 *fixed_link;
234
235 fixed_link = (u32 *)of_get_property(np, "fixed-link", NULL);
236 if (!fixed_link) {
237 err = -ENODEV;
238 goto err_out;
239 }
240
Kumar Galaa1d8f602009-01-08 10:58:38 -0800241 snprintf(priv->phy_bus_id, sizeof(priv->phy_bus_id),
242 PHY_ID_FMT, "0", fixed_link[0]);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800243 } else {
244 phy = of_find_node_by_phandle(*ph);
245
246 if (phy == NULL) {
247 err = -ENODEV;
248 goto err_out;
249 }
250
251 mdio = of_get_parent(phy);
252
253 id = of_get_property(phy, "reg", NULL);
254
255 of_node_put(phy);
256 of_node_put(mdio);
257
258 gfar_mdio_bus_name(bus_name, mdio);
Kumar Galaa1d8f602009-01-08 10:58:38 -0800259 snprintf(priv->phy_bus_id, sizeof(priv->phy_bus_id), "%s:%02x",
Andy Flemingb31a1d82008-12-16 15:29:15 -0800260 bus_name, *id);
261 }
262
263 /* Find the TBI PHY. If it's not there, we don't support SGMII */
264 ph = of_get_property(np, "tbi-handle", NULL);
265 if (ph) {
266 struct device_node *tbi = of_find_node_by_phandle(*ph);
267 struct of_device *ofdev;
268 struct mii_bus *bus;
269
270 if (!tbi)
271 return 0;
272
273 mdio = of_get_parent(tbi);
274 if (!mdio)
275 return 0;
276
277 ofdev = of_find_device_by_node(mdio);
278
279 of_node_put(mdio);
280
281 id = of_get_property(tbi, "reg", NULL);
282 if (!id)
283 return 0;
284
285 of_node_put(tbi);
286
287 bus = dev_get_drvdata(&ofdev->dev);
288
289 priv->tbiphy = bus->phy_map[*id];
290 }
291
292 return 0;
293
294err_out:
295 iounmap(priv->regs);
296 return err;
297}
298
Clifford Wolf0faac9f2009-01-09 10:23:11 +0000299/* Ioctl MII Interface */
300static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
301{
302 struct gfar_private *priv = netdev_priv(dev);
303
304 if (!netif_running(dev))
305 return -EINVAL;
306
307 if (!priv->phydev)
308 return -ENODEV;
309
310 return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
311}
312
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400313/* Set up the ethernet device structure, private data,
314 * and anything else we need before we start */
Andy Flemingb31a1d82008-12-16 15:29:15 -0800315static int gfar_probe(struct of_device *ofdev,
316 const struct of_device_id *match)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
318 u32 tempval;
319 struct net_device *dev = NULL;
320 struct gfar_private *priv = NULL;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800321 DECLARE_MAC_BUF(mac);
Dai Harukic50a5d92008-12-17 16:51:32 -0800322 int err = 0;
323 int len_devname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
325 /* Create an ethernet device instance */
326 dev = alloc_etherdev(sizeof (*priv));
327
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400328 if (NULL == dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 return -ENOMEM;
330
331 priv = netdev_priv(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700332 priv->dev = dev;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800333 priv->node = ofdev->node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Andy Flemingb31a1d82008-12-16 15:29:15 -0800335 err = gfar_of_init(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Andy Flemingb31a1d82008-12-16 15:29:15 -0800337 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 goto regs_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Andy Flemingfef61082006-04-20 16:44:29 -0500340 spin_lock_init(&priv->txlock);
341 spin_lock_init(&priv->rxlock);
Scott Woodd87eb122008-07-11 18:04:45 -0500342 spin_lock_init(&priv->bflock);
Sebastian Siewiorab939902008-08-19 21:12:45 +0200343 INIT_WORK(&priv->reset_task, gfar_reset_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Andy Flemingb31a1d82008-12-16 15:29:15 -0800345 dev_set_drvdata(&ofdev->dev, priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
347 /* Stop the DMA engine now, in case it was running before */
348 /* (The firmware could have used it, and left it running). */
Andy Fleming257d9382008-12-16 15:25:45 -0800349 gfar_halt(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
351 /* Reset MAC layer */
352 gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
353
354 tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
355 gfar_write(&priv->regs->maccfg1, tempval);
356
357 /* Initialize MACCFG2. */
358 gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS);
359
360 /* Initialize ECNTRL */
361 gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS);
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 /* Set the dev->base_addr to the gfar reg region */
364 dev->base_addr = (unsigned long) (priv->regs);
365
Andy Flemingb31a1d82008-12-16 15:29:15 -0800366 SET_NETDEV_DEV(dev, &ofdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
368 /* Fill in the dev structure */
369 dev->open = gfar_enet_open;
370 dev->hard_start_xmit = gfar_start_xmit;
371 dev->tx_timeout = gfar_timeout;
372 dev->watchdog_timeo = TX_TIMEOUT;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700373 netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT);
Vitaly Woolf2d71c22006-11-07 13:27:02 +0300374#ifdef CONFIG_NET_POLL_CONTROLLER
375 dev->poll_controller = gfar_netpoll;
376#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 dev->stop = gfar_close;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 dev->change_mtu = gfar_change_mtu;
379 dev->mtu = 1500;
380 dev->set_multicast_list = gfar_set_multi;
381
Kumar Gala0bbaf062005-06-20 10:54:21 -0500382 dev->ethtool_ops = &gfar_ethtool_ops;
Clifford Wolf0faac9f2009-01-09 10:23:11 +0000383 dev->do_ioctl = gfar_ioctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Andy Flemingb31a1d82008-12-16 15:29:15 -0800385 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500386 priv->rx_csum_enable = 1;
Dai Haruki4669bc92008-12-17 16:51:04 -0800387 dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500388 } else
389 priv->rx_csum_enable = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Kumar Gala0bbaf062005-06-20 10:54:21 -0500391 priv->vlgrp = NULL;
392
Andy Flemingb31a1d82008-12-16 15:29:15 -0800393 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500394 dev->vlan_rx_register = gfar_vlan_rx_register;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500395
396 dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500397 }
398
Andy Flemingb31a1d82008-12-16 15:29:15 -0800399 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500400 priv->extended_hash = 1;
401 priv->hash_width = 9;
402
403 priv->hash_regs[0] = &priv->regs->igaddr0;
404 priv->hash_regs[1] = &priv->regs->igaddr1;
405 priv->hash_regs[2] = &priv->regs->igaddr2;
406 priv->hash_regs[3] = &priv->regs->igaddr3;
407 priv->hash_regs[4] = &priv->regs->igaddr4;
408 priv->hash_regs[5] = &priv->regs->igaddr5;
409 priv->hash_regs[6] = &priv->regs->igaddr6;
410 priv->hash_regs[7] = &priv->regs->igaddr7;
411 priv->hash_regs[8] = &priv->regs->gaddr0;
412 priv->hash_regs[9] = &priv->regs->gaddr1;
413 priv->hash_regs[10] = &priv->regs->gaddr2;
414 priv->hash_regs[11] = &priv->regs->gaddr3;
415 priv->hash_regs[12] = &priv->regs->gaddr4;
416 priv->hash_regs[13] = &priv->regs->gaddr5;
417 priv->hash_regs[14] = &priv->regs->gaddr6;
418 priv->hash_regs[15] = &priv->regs->gaddr7;
419
420 } else {
421 priv->extended_hash = 0;
422 priv->hash_width = 8;
423
424 priv->hash_regs[0] = &priv->regs->gaddr0;
425 priv->hash_regs[1] = &priv->regs->gaddr1;
426 priv->hash_regs[2] = &priv->regs->gaddr2;
427 priv->hash_regs[3] = &priv->regs->gaddr3;
428 priv->hash_regs[4] = &priv->regs->gaddr4;
429 priv->hash_regs[5] = &priv->regs->gaddr5;
430 priv->hash_regs[6] = &priv->regs->gaddr6;
431 priv->hash_regs[7] = &priv->regs->gaddr7;
432 }
433
Andy Flemingb31a1d82008-12-16 15:29:15 -0800434 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING)
Kumar Gala0bbaf062005-06-20 10:54:21 -0500435 priv->padding = DEFAULT_PADDING;
436 else
437 priv->padding = 0;
438
Kumar Gala0bbaf062005-06-20 10:54:21 -0500439 if (dev->features & NETIF_F_IP_CSUM)
440 dev->hard_header_len += GMAC_FCB_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442 priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 priv->tx_ring_size = DEFAULT_TX_RING_SIZE;
444 priv->rx_ring_size = DEFAULT_RX_RING_SIZE;
Dai Haruki4669bc92008-12-17 16:51:04 -0800445 priv->num_txbdfree = DEFAULT_TX_RING_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
447 priv->txcoalescing = DEFAULT_TX_COALESCE;
Dai Harukib46a8452008-12-16 15:29:52 -0800448 priv->txic = DEFAULT_TXIC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 priv->rxcoalescing = DEFAULT_RX_COALESCE;
Dai Harukib46a8452008-12-16 15:29:52 -0800450 priv->rxic = DEFAULT_RXIC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Kumar Gala0bbaf062005-06-20 10:54:21 -0500452 /* Enable most messages by default */
453 priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
454
Trent Piephod3eab822008-10-02 11:12:24 +0000455 /* Carrier starts down, phylib will bring it up */
456 netif_carrier_off(dev);
457
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 err = register_netdev(dev);
459
460 if (err) {
461 printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
462 dev->name);
463 goto register_fail;
464 }
465
Dai Harukic50a5d92008-12-17 16:51:32 -0800466 /* fill out IRQ number and name fields */
467 len_devname = strlen(dev->name);
468 strncpy(&priv->int_name_tx[0], dev->name, len_devname);
469 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
470 strncpy(&priv->int_name_tx[len_devname],
471 "_tx", sizeof("_tx") + 1);
472
473 strncpy(&priv->int_name_rx[0], dev->name, len_devname);
474 strncpy(&priv->int_name_rx[len_devname],
475 "_rx", sizeof("_rx") + 1);
476
477 strncpy(&priv->int_name_er[0], dev->name, len_devname);
478 strncpy(&priv->int_name_er[len_devname],
479 "_er", sizeof("_er") + 1);
480 } else
481 priv->int_name_tx[len_devname] = '\0';
482
Andy Fleming7f7f5312005-11-11 12:38:59 -0600483 /* Create all the sysfs files */
484 gfar_init_sysfs(dev);
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 /* Print out the device info */
Johannes Berge1749612008-10-27 15:59:26 -0700487 printk(KERN_INFO DEVICE_NAME "%pM\n", dev->name, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
489 /* Even more device info helps when determining which kernel */
Andy Fleming7f7f5312005-11-11 12:38:59 -0600490 /* provided which set of benchmarks. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n",
493 dev->name, priv->rx_ring_size, priv->tx_ring_size);
494
495 return 0;
496
497register_fail:
Kumar Galacc8c6e32006-02-01 15:18:03 -0600498 iounmap(priv->regs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499regs_fail:
500 free_netdev(dev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400501 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502}
503
Andy Flemingb31a1d82008-12-16 15:29:15 -0800504static int gfar_remove(struct of_device *ofdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505{
Andy Flemingb31a1d82008-12-16 15:29:15 -0800506 struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Andy Flemingb31a1d82008-12-16 15:29:15 -0800508 dev_set_drvdata(&ofdev->dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Kumar Galacc8c6e32006-02-01 15:18:03 -0600510 iounmap(priv->regs);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800511 free_netdev(priv->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513 return 0;
514}
515
Scott Woodd87eb122008-07-11 18:04:45 -0500516#ifdef CONFIG_PM
Andy Flemingb31a1d82008-12-16 15:29:15 -0800517static int gfar_suspend(struct of_device *ofdev, pm_message_t state)
Scott Woodd87eb122008-07-11 18:04:45 -0500518{
Andy Flemingb31a1d82008-12-16 15:29:15 -0800519 struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
520 struct net_device *dev = priv->dev;
Scott Woodd87eb122008-07-11 18:04:45 -0500521 unsigned long flags;
522 u32 tempval;
523
524 int magic_packet = priv->wol_en &&
Andy Flemingb31a1d82008-12-16 15:29:15 -0800525 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
Scott Woodd87eb122008-07-11 18:04:45 -0500526
527 netif_device_detach(dev);
528
529 if (netif_running(dev)) {
530 spin_lock_irqsave(&priv->txlock, flags);
531 spin_lock(&priv->rxlock);
532
533 gfar_halt_nodisable(dev);
534
535 /* Disable Tx, and Rx if wake-on-LAN is disabled. */
536 tempval = gfar_read(&priv->regs->maccfg1);
537
538 tempval &= ~MACCFG1_TX_EN;
539
540 if (!magic_packet)
541 tempval &= ~MACCFG1_RX_EN;
542
543 gfar_write(&priv->regs->maccfg1, tempval);
544
545 spin_unlock(&priv->rxlock);
546 spin_unlock_irqrestore(&priv->txlock, flags);
547
Scott Woodd87eb122008-07-11 18:04:45 -0500548 napi_disable(&priv->napi);
Scott Woodd87eb122008-07-11 18:04:45 -0500549
550 if (magic_packet) {
551 /* Enable interrupt on Magic Packet */
552 gfar_write(&priv->regs->imask, IMASK_MAG);
553
554 /* Enable Magic Packet mode */
555 tempval = gfar_read(&priv->regs->maccfg2);
556 tempval |= MACCFG2_MPEN;
557 gfar_write(&priv->regs->maccfg2, tempval);
558 } else {
559 phy_stop(priv->phydev);
560 }
561 }
562
563 return 0;
564}
565
Andy Flemingb31a1d82008-12-16 15:29:15 -0800566static int gfar_resume(struct of_device *ofdev)
Scott Woodd87eb122008-07-11 18:04:45 -0500567{
Andy Flemingb31a1d82008-12-16 15:29:15 -0800568 struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
569 struct net_device *dev = priv->dev;
Scott Woodd87eb122008-07-11 18:04:45 -0500570 unsigned long flags;
571 u32 tempval;
572 int magic_packet = priv->wol_en &&
Andy Flemingb31a1d82008-12-16 15:29:15 -0800573 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
Scott Woodd87eb122008-07-11 18:04:45 -0500574
575 if (!netif_running(dev)) {
576 netif_device_attach(dev);
577 return 0;
578 }
579
580 if (!magic_packet && priv->phydev)
581 phy_start(priv->phydev);
582
583 /* Disable Magic Packet mode, in case something
584 * else woke us up.
585 */
586
587 spin_lock_irqsave(&priv->txlock, flags);
588 spin_lock(&priv->rxlock);
589
590 tempval = gfar_read(&priv->regs->maccfg2);
591 tempval &= ~MACCFG2_MPEN;
592 gfar_write(&priv->regs->maccfg2, tempval);
593
594 gfar_start(dev);
595
596 spin_unlock(&priv->rxlock);
597 spin_unlock_irqrestore(&priv->txlock, flags);
598
599 netif_device_attach(dev);
600
Scott Woodd87eb122008-07-11 18:04:45 -0500601 napi_enable(&priv->napi);
Scott Woodd87eb122008-07-11 18:04:45 -0500602
603 return 0;
604}
605#else
606#define gfar_suspend NULL
607#define gfar_resume NULL
608#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600610/* Reads the controller's registers to determine what interface
611 * connects it to the PHY.
612 */
613static phy_interface_t gfar_get_interface(struct net_device *dev)
614{
615 struct gfar_private *priv = netdev_priv(dev);
616 u32 ecntrl = gfar_read(&priv->regs->ecntrl);
617
618 if (ecntrl & ECNTRL_SGMII_MODE)
619 return PHY_INTERFACE_MODE_SGMII;
620
621 if (ecntrl & ECNTRL_TBI_MODE) {
622 if (ecntrl & ECNTRL_REDUCED_MODE)
623 return PHY_INTERFACE_MODE_RTBI;
624 else
625 return PHY_INTERFACE_MODE_TBI;
626 }
627
628 if (ecntrl & ECNTRL_REDUCED_MODE) {
629 if (ecntrl & ECNTRL_REDUCED_MII_MODE)
630 return PHY_INTERFACE_MODE_RMII;
Andy Fleming7132ab72007-07-11 11:43:07 -0500631 else {
Andy Flemingb31a1d82008-12-16 15:29:15 -0800632 phy_interface_t interface = priv->interface;
Andy Fleming7132ab72007-07-11 11:43:07 -0500633
634 /*
635 * This isn't autodetected right now, so it must
636 * be set by the device tree or platform code.
637 */
638 if (interface == PHY_INTERFACE_MODE_RGMII_ID)
639 return PHY_INTERFACE_MODE_RGMII_ID;
640
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600641 return PHY_INTERFACE_MODE_RGMII;
Andy Fleming7132ab72007-07-11 11:43:07 -0500642 }
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600643 }
644
Andy Flemingb31a1d82008-12-16 15:29:15 -0800645 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600646 return PHY_INTERFACE_MODE_GMII;
647
648 return PHY_INTERFACE_MODE_MII;
649}
650
651
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400652/* Initializes driver's PHY state, and attaches to the PHY.
653 * Returns 0 on success.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 */
655static int init_phy(struct net_device *dev)
656{
657 struct gfar_private *priv = netdev_priv(dev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400658 uint gigabit_support =
Andy Flemingb31a1d82008-12-16 15:29:15 -0800659 priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400660 SUPPORTED_1000baseT_Full : 0;
661 struct phy_device *phydev;
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600662 phy_interface_t interface;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
664 priv->oldlink = 0;
665 priv->oldspeed = 0;
666 priv->oldduplex = -1;
667
Andy Fleminge8a2b6a2006-12-01 12:01:06 -0600668 interface = gfar_get_interface(dev);
669
Andy Flemingb31a1d82008-12-16 15:29:15 -0800670 phydev = phy_connect(dev, priv->phy_bus_id, &adjust_link, 0, interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
Kapil Junejad3c12872007-05-11 18:25:11 -0500672 if (interface == PHY_INTERFACE_MODE_SGMII)
673 gfar_configure_serdes(dev);
674
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400675 if (IS_ERR(phydev)) {
676 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
677 return PTR_ERR(phydev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 }
679
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400680 /* Remove any features not supported by the controller */
681 phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
682 phydev->advertising = phydev->supported;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400684 priv->phydev = phydev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
686 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687}
688
Paul Gortmakerd0313582008-04-17 00:08:10 -0400689/*
690 * Initialize TBI PHY interface for communicating with the
691 * SERDES lynx PHY on the chip. We communicate with this PHY
692 * through the MDIO bus on each controller, treating it as a
693 * "normal" PHY at the address found in the TBIPA register. We assume
694 * that the TBIPA register is valid. Either the MDIO bus code will set
695 * it to a value that doesn't conflict with other PHYs on the bus, or the
696 * value doesn't matter, as there are no other PHYs on the bus.
697 */
Kapil Junejad3c12872007-05-11 18:25:11 -0500698static void gfar_configure_serdes(struct net_device *dev)
699{
700 struct gfar_private *priv = netdev_priv(dev);
Trent Piephoc1324192008-10-30 18:17:06 -0700701
Andy Flemingb31a1d82008-12-16 15:29:15 -0800702 if (!priv->tbiphy) {
703 printk(KERN_WARNING "SGMII mode requires that the device "
704 "tree specify a tbi-handle\n");
705 return;
706 }
Kapil Junejad3c12872007-05-11 18:25:11 -0500707
Andy Flemingb31a1d82008-12-16 15:29:15 -0800708 /*
709 * If the link is already up, we must already be ok, and don't need to
Trent Piephobdb59f92008-10-30 18:17:07 -0700710 * configure and reset the TBI<->SerDes link. Maybe U-Boot configured
711 * everything for us? Resetting it takes the link down and requires
712 * several seconds for it to come back.
713 */
Andy Flemingb31a1d82008-12-16 15:29:15 -0800714 if (phy_read(priv->tbiphy, MII_BMSR) & BMSR_LSTATUS)
715 return;
Kapil Junejad3c12872007-05-11 18:25:11 -0500716
Paul Gortmakerd0313582008-04-17 00:08:10 -0400717 /* Single clk mode, mii mode off(for serdes communication) */
Andy Flemingb31a1d82008-12-16 15:29:15 -0800718 phy_write(priv->tbiphy, MII_TBICON, TBICON_CLK_SELECT);
Kapil Junejad3c12872007-05-11 18:25:11 -0500719
Andy Flemingb31a1d82008-12-16 15:29:15 -0800720 phy_write(priv->tbiphy, MII_ADVERTISE,
Kapil Junejad3c12872007-05-11 18:25:11 -0500721 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
722 ADVERTISE_1000XPSE_ASYM);
723
Andy Flemingb31a1d82008-12-16 15:29:15 -0800724 phy_write(priv->tbiphy, MII_BMCR, BMCR_ANENABLE |
Kapil Junejad3c12872007-05-11 18:25:11 -0500725 BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000);
726}
727
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728static void init_registers(struct net_device *dev)
729{
730 struct gfar_private *priv = netdev_priv(dev);
731
732 /* Clear IEVENT */
733 gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR);
734
735 /* Initialize IMASK */
736 gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR);
737
738 /* Init hash registers to zero */
Kumar Gala0bbaf062005-06-20 10:54:21 -0500739 gfar_write(&priv->regs->igaddr0, 0);
740 gfar_write(&priv->regs->igaddr1, 0);
741 gfar_write(&priv->regs->igaddr2, 0);
742 gfar_write(&priv->regs->igaddr3, 0);
743 gfar_write(&priv->regs->igaddr4, 0);
744 gfar_write(&priv->regs->igaddr5, 0);
745 gfar_write(&priv->regs->igaddr6, 0);
746 gfar_write(&priv->regs->igaddr7, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
748 gfar_write(&priv->regs->gaddr0, 0);
749 gfar_write(&priv->regs->gaddr1, 0);
750 gfar_write(&priv->regs->gaddr2, 0);
751 gfar_write(&priv->regs->gaddr3, 0);
752 gfar_write(&priv->regs->gaddr4, 0);
753 gfar_write(&priv->regs->gaddr5, 0);
754 gfar_write(&priv->regs->gaddr6, 0);
755 gfar_write(&priv->regs->gaddr7, 0);
756
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 /* Zero out the rmon mib registers if it has them */
Andy Flemingb31a1d82008-12-16 15:29:15 -0800758 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
Kumar Galacc8c6e32006-02-01 15:18:03 -0600759 memset_io(&(priv->regs->rmon), 0, sizeof (struct rmon_mib));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
761 /* Mask off the CAM interrupts */
762 gfar_write(&priv->regs->rmon.cam1, 0xffffffff);
763 gfar_write(&priv->regs->rmon.cam2, 0xffffffff);
764 }
765
766 /* Initialize the max receive buffer length */
767 gfar_write(&priv->regs->mrblr, priv->rx_buffer_size);
768
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 /* Initialize the Minimum Frame Length Register */
770 gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771}
772
Kumar Gala0bbaf062005-06-20 10:54:21 -0500773
774/* Halt the receive and transmit queues */
Scott Woodd87eb122008-07-11 18:04:45 -0500775static void gfar_halt_nodisable(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776{
777 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600778 struct gfar __iomem *regs = priv->regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 u32 tempval;
780
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 /* Mask all interrupts */
782 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
783
784 /* Clear all interrupts */
785 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
786
787 /* Stop the DMA, and wait for it to stop */
788 tempval = gfar_read(&priv->regs->dmactrl);
789 if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
790 != (DMACTRL_GRS | DMACTRL_GTS)) {
791 tempval |= (DMACTRL_GRS | DMACTRL_GTS);
792 gfar_write(&priv->regs->dmactrl, tempval);
793
794 while (!(gfar_read(&priv->regs->ievent) &
795 (IEVENT_GRSC | IEVENT_GTSC)))
796 cpu_relax();
797 }
Scott Woodd87eb122008-07-11 18:04:45 -0500798}
Scott Woodd87eb122008-07-11 18:04:45 -0500799
800/* Halt the receive and transmit queues */
801void gfar_halt(struct net_device *dev)
802{
803 struct gfar_private *priv = netdev_priv(dev);
804 struct gfar __iomem *regs = priv->regs;
805 u32 tempval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Scott Wood2a54adc2008-08-12 15:10:46 -0500807 gfar_halt_nodisable(dev);
808
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 /* Disable Rx and Tx */
810 tempval = gfar_read(&regs->maccfg1);
811 tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
812 gfar_write(&regs->maccfg1, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500813}
814
815void stop_gfar(struct net_device *dev)
816{
817 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600818 struct gfar __iomem *regs = priv->regs;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500819 unsigned long flags;
820
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400821 phy_stop(priv->phydev);
822
Kumar Gala0bbaf062005-06-20 10:54:21 -0500823 /* Lock it down */
Andy Flemingfef61082006-04-20 16:44:29 -0500824 spin_lock_irqsave(&priv->txlock, flags);
825 spin_lock(&priv->rxlock);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500826
Kumar Gala0bbaf062005-06-20 10:54:21 -0500827 gfar_halt(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828
Andy Flemingfef61082006-04-20 16:44:29 -0500829 spin_unlock(&priv->rxlock);
830 spin_unlock_irqrestore(&priv->txlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
832 /* Free the IRQs */
Andy Flemingb31a1d82008-12-16 15:29:15 -0800833 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 free_irq(priv->interruptError, dev);
835 free_irq(priv->interruptTransmit, dev);
836 free_irq(priv->interruptReceive, dev);
837 } else {
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400838 free_irq(priv->interruptTransmit, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 }
840
841 free_skb_resources(priv);
842
Becky Brucecf782292008-02-18 17:24:30 -0600843 dma_free_coherent(&dev->dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 sizeof(struct txbd8)*priv->tx_ring_size
845 + sizeof(struct rxbd8)*priv->rx_ring_size,
846 priv->tx_bd_base,
Kumar Gala0bbaf062005-06-20 10:54:21 -0500847 gfar_read(&regs->tbase0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848}
849
850/* If there are any tx skbs or rx skbs still around, free them.
851 * Then free tx_skbuff and rx_skbuff */
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400852static void free_skb_resources(struct gfar_private *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853{
854 struct rxbd8 *rxbdp;
855 struct txbd8 *txbdp;
Dai Haruki4669bc92008-12-17 16:51:04 -0800856 int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
858 /* Go through all the buffer descriptors and free their data buffers */
859 txbdp = priv->tx_bd_base;
860
861 for (i = 0; i < priv->tx_ring_size; i++) {
Dai Haruki4669bc92008-12-17 16:51:04 -0800862 if (!priv->tx_skbuff[i])
863 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
Dai Haruki4669bc92008-12-17 16:51:04 -0800865 dma_unmap_single(&priv->dev->dev, txbdp->bufPtr,
866 txbdp->length, DMA_TO_DEVICE);
867 txbdp->lstatus = 0;
868 for (j = 0; j < skb_shinfo(priv->tx_skbuff[i])->nr_frags; j++) {
869 txbdp++;
870 dma_unmap_page(&priv->dev->dev, txbdp->bufPtr,
871 txbdp->length, DMA_TO_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 }
Andy Flemingad5da7a2008-05-07 13:20:55 -0500873 txbdp++;
Dai Haruki4669bc92008-12-17 16:51:04 -0800874 dev_kfree_skb_any(priv->tx_skbuff[i]);
875 priv->tx_skbuff[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 }
877
878 kfree(priv->tx_skbuff);
879
880 rxbdp = priv->rx_bd_base;
881
882 /* rx_skbuff is not guaranteed to be allocated, so only
883 * free it and its contents if it is allocated */
884 if(priv->rx_skbuff != NULL) {
885 for (i = 0; i < priv->rx_ring_size; i++) {
886 if (priv->rx_skbuff[i]) {
Becky Brucecf782292008-02-18 17:24:30 -0600887 dma_unmap_single(&priv->dev->dev, rxbdp->bufPtr,
Andy Fleming7f7f5312005-11-11 12:38:59 -0600888 priv->rx_buffer_size,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 DMA_FROM_DEVICE);
890
891 dev_kfree_skb_any(priv->rx_skbuff[i]);
892 priv->rx_skbuff[i] = NULL;
893 }
894
Dai Haruki5a5efed2008-12-16 15:34:50 -0800895 rxbdp->lstatus = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 rxbdp->bufPtr = 0;
897
898 rxbdp++;
899 }
900
901 kfree(priv->rx_skbuff);
902 }
903}
904
Kumar Gala0bbaf062005-06-20 10:54:21 -0500905void gfar_start(struct net_device *dev)
906{
907 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600908 struct gfar __iomem *regs = priv->regs;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500909 u32 tempval;
910
911 /* Enable Rx and Tx in MACCFG1 */
912 tempval = gfar_read(&regs->maccfg1);
913 tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
914 gfar_write(&regs->maccfg1, tempval);
915
916 /* Initialize DMACTRL to have WWR and WOP */
917 tempval = gfar_read(&priv->regs->dmactrl);
918 tempval |= DMACTRL_INIT_SETTINGS;
919 gfar_write(&priv->regs->dmactrl, tempval);
920
Kumar Gala0bbaf062005-06-20 10:54:21 -0500921 /* Make sure we aren't stopped */
922 tempval = gfar_read(&priv->regs->dmactrl);
923 tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
924 gfar_write(&priv->regs->dmactrl, tempval);
925
Andy Flemingfef61082006-04-20 16:44:29 -0500926 /* Clear THLT/RHLT, so that the DMA starts polling now */
927 gfar_write(&regs->tstat, TSTAT_CLEAR_THALT);
928 gfar_write(&regs->rstat, RSTAT_CLEAR_RHALT);
929
Kumar Gala0bbaf062005-06-20 10:54:21 -0500930 /* Unmask the interrupts we look for */
931 gfar_write(&regs->imask, IMASK_DEFAULT);
Dai Haruki12dea572008-12-16 15:30:20 -0800932
933 dev->trans_start = jiffies;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500934}
935
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936/* Bring the controller up and running */
937int startup_gfar(struct net_device *dev)
938{
939 struct txbd8 *txbdp;
940 struct rxbd8 *rxbdp;
Grant Likelyf9663ae2007-12-01 22:10:03 -0700941 dma_addr_t addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 unsigned long vaddr;
943 int i;
944 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -0600945 struct gfar __iomem *regs = priv->regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 int err = 0;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500947 u32 rctrl = 0;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600948 u32 attrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949
950 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
951
952 /* Allocate memory for the buffer descriptors */
Becky Brucecf782292008-02-18 17:24:30 -0600953 vaddr = (unsigned long) dma_alloc_coherent(&dev->dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 sizeof (struct txbd8) * priv->tx_ring_size +
955 sizeof (struct rxbd8) * priv->rx_ring_size,
956 &addr, GFP_KERNEL);
957
958 if (vaddr == 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500959 if (netif_msg_ifup(priv))
960 printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n",
961 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 return -ENOMEM;
963 }
964
965 priv->tx_bd_base = (struct txbd8 *) vaddr;
966
967 /* enet DMA only understands physical addresses */
Kumar Gala0bbaf062005-06-20 10:54:21 -0500968 gfar_write(&regs->tbase0, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
970 /* Start the rx descriptor ring where the tx ring leaves off */
971 addr = addr + sizeof (struct txbd8) * priv->tx_ring_size;
972 vaddr = vaddr + sizeof (struct txbd8) * priv->tx_ring_size;
973 priv->rx_bd_base = (struct rxbd8 *) vaddr;
Kumar Gala0bbaf062005-06-20 10:54:21 -0500974 gfar_write(&regs->rbase0, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
976 /* Setup the skbuff rings */
977 priv->tx_skbuff =
978 (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
979 priv->tx_ring_size, GFP_KERNEL);
980
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400981 if (NULL == priv->tx_skbuff) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500982 if (netif_msg_ifup(priv))
983 printk(KERN_ERR "%s: Could not allocate tx_skbuff\n",
984 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 err = -ENOMEM;
986 goto tx_skb_fail;
987 }
988
989 for (i = 0; i < priv->tx_ring_size; i++)
990 priv->tx_skbuff[i] = NULL;
991
992 priv->rx_skbuff =
993 (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
994 priv->rx_ring_size, GFP_KERNEL);
995
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400996 if (NULL == priv->rx_skbuff) {
Kumar Gala0bbaf062005-06-20 10:54:21 -0500997 if (netif_msg_ifup(priv))
998 printk(KERN_ERR "%s: Could not allocate rx_skbuff\n",
999 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 err = -ENOMEM;
1001 goto rx_skb_fail;
1002 }
1003
1004 for (i = 0; i < priv->rx_ring_size; i++)
1005 priv->rx_skbuff[i] = NULL;
1006
1007 /* Initialize some variables in our dev structure */
Dai Haruki4669bc92008-12-17 16:51:04 -08001008 priv->num_txbdfree = priv->tx_ring_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 priv->dirty_tx = priv->cur_tx = priv->tx_bd_base;
1010 priv->cur_rx = priv->rx_bd_base;
1011 priv->skb_curtx = priv->skb_dirtytx = 0;
1012 priv->skb_currx = 0;
1013
1014 /* Initialize Transmit Descriptor Ring */
1015 txbdp = priv->tx_bd_base;
1016 for (i = 0; i < priv->tx_ring_size; i++) {
Dai Haruki5a5efed2008-12-16 15:34:50 -08001017 txbdp->lstatus = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 txbdp->bufPtr = 0;
1019 txbdp++;
1020 }
1021
1022 /* Set the last descriptor in the ring to indicate wrap */
1023 txbdp--;
1024 txbdp->status |= TXBD_WRAP;
1025
1026 rxbdp = priv->rx_bd_base;
1027 for (i = 0; i < priv->rx_ring_size; i++) {
Andy Fleming815b97c2008-04-22 17:18:29 -05001028 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Andy Fleming815b97c2008-04-22 17:18:29 -05001030 skb = gfar_new_skb(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
Andy Fleming815b97c2008-04-22 17:18:29 -05001032 if (!skb) {
1033 printk(KERN_ERR "%s: Can't allocate RX buffers\n",
1034 dev->name);
1035
1036 goto err_rxalloc_fail;
1037 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
1039 priv->rx_skbuff[i] = skb;
1040
Andy Fleming815b97c2008-04-22 17:18:29 -05001041 gfar_new_rxbdp(dev, rxbdp, skb);
1042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 rxbdp++;
1044 }
1045
1046 /* Set the last descriptor in the ring to wrap */
1047 rxbdp--;
1048 rxbdp->status |= RXBD_WRAP;
1049
1050 /* If the device has multiple interrupts, register for
1051 * them. Otherwise, only register for the one */
Andy Flemingb31a1d82008-12-16 15:29:15 -08001052 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001053 /* Install our interrupt handlers for Error,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 * Transmit, and Receive */
1055 if (request_irq(priv->interruptError, gfar_error,
Dai Harukic50a5d92008-12-17 16:51:32 -08001056 0, priv->int_name_er, dev) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001057 if (netif_msg_intr(priv))
1058 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1059 dev->name, priv->interruptError);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060
1061 err = -1;
1062 goto err_irq_fail;
1063 }
1064
1065 if (request_irq(priv->interruptTransmit, gfar_transmit,
Dai Harukic50a5d92008-12-17 16:51:32 -08001066 0, priv->int_name_tx, dev) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001067 if (netif_msg_intr(priv))
1068 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1069 dev->name, priv->interruptTransmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
1071 err = -1;
1072
1073 goto tx_irq_fail;
1074 }
1075
1076 if (request_irq(priv->interruptReceive, gfar_receive,
Dai Harukic50a5d92008-12-17 16:51:32 -08001077 0, priv->int_name_rx, dev) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001078 if (netif_msg_intr(priv))
1079 printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n",
1080 dev->name, priv->interruptReceive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081
1082 err = -1;
1083 goto rx_irq_fail;
1084 }
1085 } else {
1086 if (request_irq(priv->interruptTransmit, gfar_interrupt,
Dai Harukic50a5d92008-12-17 16:51:32 -08001087 0, priv->int_name_tx, dev) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001088 if (netif_msg_intr(priv))
1089 printk(KERN_ERR "%s: Can't get IRQ %d\n",
Dai Harukic50a5d92008-12-17 16:51:32 -08001090 dev->name, priv->interruptTransmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
1092 err = -1;
1093 goto err_irq_fail;
1094 }
1095 }
1096
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001097 phy_start(priv->phydev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
1099 /* Configure the coalescing support */
Dai Harukib46a8452008-12-16 15:29:52 -08001100 gfar_write(&regs->txic, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 if (priv->txcoalescing)
Dai Harukib46a8452008-12-16 15:29:52 -08001102 gfar_write(&regs->txic, priv->txic);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
Dai Harukib46a8452008-12-16 15:29:52 -08001104 gfar_write(&regs->rxic, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 if (priv->rxcoalescing)
Dai Harukib46a8452008-12-16 15:29:52 -08001106 gfar_write(&regs->rxic, priv->rxic);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107
Kumar Gala0bbaf062005-06-20 10:54:21 -05001108 if (priv->rx_csum_enable)
1109 rctrl |= RCTRL_CHECKSUMMING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
Andy Fleming7f7f5312005-11-11 12:38:59 -06001111 if (priv->extended_hash) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001112 rctrl |= RCTRL_EXTHASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
Andy Fleming7f7f5312005-11-11 12:38:59 -06001114 gfar_clear_exact_match(dev);
1115 rctrl |= RCTRL_EMEN;
1116 }
1117
Andy Fleming7f7f5312005-11-11 12:38:59 -06001118 if (priv->padding) {
1119 rctrl &= ~RCTRL_PAL_MASK;
1120 rctrl |= RCTRL_PADDING(priv->padding);
1121 }
1122
Kumar Gala0bbaf062005-06-20 10:54:21 -05001123 /* Init rctrl based on our settings */
1124 gfar_write(&priv->regs->rctrl, rctrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125
Kumar Gala0bbaf062005-06-20 10:54:21 -05001126 if (dev->features & NETIF_F_IP_CSUM)
1127 gfar_write(&priv->regs->tctrl, TCTRL_INIT_CSUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
Andy Fleming7f7f5312005-11-11 12:38:59 -06001129 /* Set the extraction length and index */
1130 attrs = ATTRELI_EL(priv->rx_stash_size) |
1131 ATTRELI_EI(priv->rx_stash_index);
1132
1133 gfar_write(&priv->regs->attreli, attrs);
1134
1135 /* Start with defaults, and add stashing or locking
1136 * depending on the approprate variables */
1137 attrs = ATTR_INIT_SETTINGS;
1138
1139 if (priv->bd_stash_en)
1140 attrs |= ATTR_BDSTASH;
1141
1142 if (priv->rx_stash_size != 0)
1143 attrs |= ATTR_BUFSTASH;
1144
1145 gfar_write(&priv->regs->attr, attrs);
1146
1147 gfar_write(&priv->regs->fifo_tx_thr, priv->fifo_threshold);
1148 gfar_write(&priv->regs->fifo_tx_starve, priv->fifo_starve);
1149 gfar_write(&priv->regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
1150
1151 /* Start the controller */
Kumar Gala0bbaf062005-06-20 10:54:21 -05001152 gfar_start(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153
1154 return 0;
1155
1156rx_irq_fail:
1157 free_irq(priv->interruptTransmit, dev);
1158tx_irq_fail:
1159 free_irq(priv->interruptError, dev);
1160err_irq_fail:
Jeff Garzik7d2e3cb2008-05-13 01:41:58 -04001161err_rxalloc_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162rx_skb_fail:
1163 free_skb_resources(priv);
1164tx_skb_fail:
Becky Brucecf782292008-02-18 17:24:30 -06001165 dma_free_coherent(&dev->dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 sizeof(struct txbd8)*priv->tx_ring_size
1167 + sizeof(struct rxbd8)*priv->rx_ring_size,
1168 priv->tx_bd_base,
Kumar Gala0bbaf062005-06-20 10:54:21 -05001169 gfar_read(&regs->tbase0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 return err;
1172}
1173
1174/* Called when something needs to use the ethernet device */
1175/* Returns 0 for success. */
1176static int gfar_enet_open(struct net_device *dev)
1177{
Li Yang94e8cc32007-10-12 21:53:51 +08001178 struct gfar_private *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 int err;
1180
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001181 napi_enable(&priv->napi);
1182
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 /* Initialize a bunch of registers */
1184 init_registers(dev);
1185
1186 gfar_set_mac_address(dev);
1187
1188 err = init_phy(dev);
1189
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001190 if(err) {
1191 napi_disable(&priv->napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 return err;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001193 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
1195 err = startup_gfar(dev);
Anton Vorontsovdb0e8e32007-10-17 23:57:46 +04001196 if (err) {
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001197 napi_disable(&priv->napi);
Anton Vorontsovdb0e8e32007-10-17 23:57:46 +04001198 return err;
1199 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
1201 netif_start_queue(dev);
1202
1203 return err;
1204}
1205
Dai Harukia22823e2008-12-16 15:32:11 -08001206static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001207{
1208 struct txfcb *fcb = (struct txfcb *)skb_push (skb, GMAC_FCB_LEN);
1209
Dai Harukia22823e2008-12-16 15:32:11 -08001210 cacheable_memzero(fcb, GMAC_FCB_LEN);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001211
Kumar Gala0bbaf062005-06-20 10:54:21 -05001212 return fcb;
1213}
1214
1215static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb)
1216{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001217 u8 flags = 0;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001218
1219 /* If we're here, it's a IP packet with a TCP or UDP
1220 * payload. We set it to checksum, using a pseudo-header
1221 * we provide
1222 */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001223 flags = TXFCB_DEFAULT;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001224
Andy Fleming7f7f5312005-11-11 12:38:59 -06001225 /* Tell the controller what the protocol is */
1226 /* And provide the already calculated phcs */
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001227 if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06001228 flags |= TXFCB_UDP;
Arnaldo Carvalho de Melo4bedb452007-03-13 14:28:48 -03001229 fcb->phcs = udp_hdr(skb)->check;
Andy Fleming7f7f5312005-11-11 12:38:59 -06001230 } else
Kumar Gala8da32de2007-06-29 00:12:04 -05001231 fcb->phcs = tcp_hdr(skb)->check;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001232
1233 /* l3os is the distance between the start of the
1234 * frame (skb->data) and the start of the IP hdr.
1235 * l4os is the distance between the start of the
1236 * l3 hdr and the l4 hdr */
Arnaldo Carvalho de Melobbe735e2007-03-10 22:16:10 -03001237 fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN);
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -03001238 fcb->l4os = skb_network_header_len(skb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001239
Andy Fleming7f7f5312005-11-11 12:38:59 -06001240 fcb->flags = flags;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001241}
1242
Andy Fleming7f7f5312005-11-11 12:38:59 -06001243void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001244{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001245 fcb->flags |= TXFCB_VLN;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001246 fcb->vlctl = vlan_tx_tag_get(skb);
1247}
1248
Dai Haruki4669bc92008-12-17 16:51:04 -08001249static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride,
1250 struct txbd8 *base, int ring_size)
1251{
1252 struct txbd8 *new_bd = bdp + stride;
1253
1254 return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd;
1255}
1256
1257static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base,
1258 int ring_size)
1259{
1260 return skip_txbd(bdp, 1, base, ring_size);
1261}
1262
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263/* This is called by the kernel when a frame is ready for transmission. */
1264/* It is pointed to by the dev->hard_start_xmit function pointer */
1265static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
1266{
1267 struct gfar_private *priv = netdev_priv(dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001268 struct txfcb *fcb = NULL;
Dai Haruki4669bc92008-12-17 16:51:04 -08001269 struct txbd8 *txbdp, *txbdp_start, *base;
Dai Haruki5a5efed2008-12-16 15:34:50 -08001270 u32 lstatus;
Dai Haruki4669bc92008-12-17 16:51:04 -08001271 int i;
1272 u32 bufaddr;
Andy Flemingfef61082006-04-20 16:44:29 -05001273 unsigned long flags;
Dai Haruki4669bc92008-12-17 16:51:04 -08001274 unsigned int nr_frags, length;
1275
1276 base = priv->tx_bd_base;
1277
1278 /* total number of fragments in the SKB */
1279 nr_frags = skb_shinfo(skb)->nr_frags;
1280
1281 spin_lock_irqsave(&priv->txlock, flags);
1282
1283 /* check if there is space to queue this packet */
1284 if (nr_frags > priv->num_txbdfree) {
1285 /* no space, stop the queue */
1286 netif_stop_queue(dev);
1287 dev->stats.tx_fifo_errors++;
1288 spin_unlock_irqrestore(&priv->txlock, flags);
1289 return NETDEV_TX_BUSY;
1290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291
1292 /* Update transmit stats */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001293 dev->stats.tx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
Dai Haruki4669bc92008-12-17 16:51:04 -08001295 txbdp = txbdp_start = priv->cur_tx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296
Dai Haruki4669bc92008-12-17 16:51:04 -08001297 if (nr_frags == 0) {
1298 lstatus = txbdp->lstatus | BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
1299 } else {
1300 /* Place the fragment addresses and lengths into the TxBDs */
1301 for (i = 0; i < nr_frags; i++) {
1302 /* Point at the next BD, wrapping as needed */
1303 txbdp = next_txbd(txbdp, base, priv->tx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
Dai Haruki4669bc92008-12-17 16:51:04 -08001305 length = skb_shinfo(skb)->frags[i].size;
1306
1307 lstatus = txbdp->lstatus | length |
1308 BD_LFLAG(TXBD_READY);
1309
1310 /* Handle the last BD specially */
1311 if (i == nr_frags - 1)
1312 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
1313
1314 bufaddr = dma_map_page(&dev->dev,
1315 skb_shinfo(skb)->frags[i].page,
1316 skb_shinfo(skb)->frags[i].page_offset,
1317 length,
1318 DMA_TO_DEVICE);
1319
1320 /* set the TxBD length and buffer pointer */
1321 txbdp->bufPtr = bufaddr;
1322 txbdp->lstatus = lstatus;
1323 }
1324
1325 lstatus = txbdp_start->lstatus;
1326 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327
Kumar Gala0bbaf062005-06-20 10:54:21 -05001328 /* Set up checksumming */
Dai Haruki12dea572008-12-16 15:30:20 -08001329 if (CHECKSUM_PARTIAL == skb->ip_summed) {
Dai Harukia22823e2008-12-16 15:32:11 -08001330 fcb = gfar_add_fcb(skb);
Dai Haruki5a5efed2008-12-16 15:34:50 -08001331 lstatus |= BD_LFLAG(TXBD_TOE);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001332 gfar_tx_checksum(skb, fcb);
1333 }
1334
Dai Haruki77ecaf22008-12-16 15:30:48 -08001335 if (priv->vlgrp && vlan_tx_tag_present(skb)) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06001336 if (unlikely(NULL == fcb)) {
Dai Harukia22823e2008-12-16 15:32:11 -08001337 fcb = gfar_add_fcb(skb);
Dai Haruki5a5efed2008-12-16 15:34:50 -08001338 lstatus |= BD_LFLAG(TXBD_TOE);
Andy Fleming7f7f5312005-11-11 12:38:59 -06001339 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05001340
1341 gfar_tx_vlan(skb, fcb);
1342 }
1343
Dai Haruki4669bc92008-12-17 16:51:04 -08001344 /* setup the TxBD length and buffer pointer for the first BD */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 priv->tx_skbuff[priv->skb_curtx] = skb;
Dai Haruki4669bc92008-12-17 16:51:04 -08001346 txbdp_start->bufPtr = dma_map_single(&dev->dev, skb->data,
1347 skb_headlen(skb), DMA_TO_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
Dai Haruki4669bc92008-12-17 16:51:04 -08001349 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350
Dai Haruki4669bc92008-12-17 16:51:04 -08001351 /*
1352 * The powerpc-specific eieio() is used, as wmb() has too strong
Scott Wood3b6330c2007-05-16 15:06:59 -05001353 * semantics (it requires synchronization between cacheable and
1354 * uncacheable mappings, which eieio doesn't provide and which we
1355 * don't need), thus requiring a more expensive sync instruction. At
1356 * some point, the set of architecture-independent barrier functions
1357 * should be expanded to include weaker barriers.
1358 */
Scott Wood3b6330c2007-05-16 15:06:59 -05001359 eieio();
Andy Fleming7f7f5312005-11-11 12:38:59 -06001360
Dai Haruki4669bc92008-12-17 16:51:04 -08001361 txbdp_start->lstatus = lstatus;
1362
1363 /* Update the current skb pointer to the next entry we will use
1364 * (wrapping if necessary) */
1365 priv->skb_curtx = (priv->skb_curtx + 1) &
1366 TX_RING_MOD_MASK(priv->tx_ring_size);
1367
1368 priv->cur_tx = next_txbd(txbdp, base, priv->tx_ring_size);
1369
1370 /* reduce TxBD free count */
1371 priv->num_txbdfree -= (nr_frags + 1);
1372
1373 dev->trans_start = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374
1375 /* If the next BD still needs to be cleaned up, then the bds
1376 are full. We need to tell the kernel to stop sending us stuff. */
Dai Haruki4669bc92008-12-17 16:51:04 -08001377 if (!priv->num_txbdfree) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 netif_stop_queue(dev);
1379
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001380 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 }
1382
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 /* Tell the DMA to go go go */
1384 gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
1385
1386 /* Unlock priv */
Andy Flemingfef61082006-04-20 16:44:29 -05001387 spin_unlock_irqrestore(&priv->txlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388
1389 return 0;
1390}
1391
1392/* Stops the kernel queue, and halts the controller */
1393static int gfar_close(struct net_device *dev)
1394{
1395 struct gfar_private *priv = netdev_priv(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001396
1397 napi_disable(&priv->napi);
1398
Sebastian Siewiorab939902008-08-19 21:12:45 +02001399 cancel_work_sync(&priv->reset_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 stop_gfar(dev);
1401
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001402 /* Disconnect from the PHY */
1403 phy_disconnect(priv->phydev);
1404 priv->phydev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405
1406 netif_stop_queue(dev);
1407
1408 return 0;
1409}
1410
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411/* Changes the mac address if the controller is not running. */
Andy Flemingf162b9d2008-05-02 13:00:30 -05001412static int gfar_set_mac_address(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001414 gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
1416 return 0;
1417}
1418
1419
Kumar Gala0bbaf062005-06-20 10:54:21 -05001420/* Enables and disables VLAN insertion/extraction */
1421static void gfar_vlan_rx_register(struct net_device *dev,
1422 struct vlan_group *grp)
1423{
1424 struct gfar_private *priv = netdev_priv(dev);
1425 unsigned long flags;
Dai Haruki77ecaf22008-12-16 15:30:48 -08001426 struct vlan_group *old_grp;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001427 u32 tempval;
1428
Andy Flemingfef61082006-04-20 16:44:29 -05001429 spin_lock_irqsave(&priv->rxlock, flags);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001430
Dai Haruki77ecaf22008-12-16 15:30:48 -08001431 old_grp = priv->vlgrp;
1432
1433 if (old_grp == grp)
1434 return;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001435
1436 if (grp) {
1437 /* Enable VLAN tag insertion */
1438 tempval = gfar_read(&priv->regs->tctrl);
1439 tempval |= TCTRL_VLINS;
1440
1441 gfar_write(&priv->regs->tctrl, tempval);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001442
Kumar Gala0bbaf062005-06-20 10:54:21 -05001443 /* Enable VLAN tag extraction */
1444 tempval = gfar_read(&priv->regs->rctrl);
1445 tempval |= RCTRL_VLEX;
Dai Haruki77ecaf22008-12-16 15:30:48 -08001446 tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001447 gfar_write(&priv->regs->rctrl, tempval);
1448 } else {
1449 /* Disable VLAN tag insertion */
1450 tempval = gfar_read(&priv->regs->tctrl);
1451 tempval &= ~TCTRL_VLINS;
1452 gfar_write(&priv->regs->tctrl, tempval);
1453
1454 /* Disable VLAN tag extraction */
1455 tempval = gfar_read(&priv->regs->rctrl);
1456 tempval &= ~RCTRL_VLEX;
Dai Haruki77ecaf22008-12-16 15:30:48 -08001457 /* If parse is no longer required, then disable parser */
1458 if (tempval & RCTRL_REQ_PARSER)
1459 tempval |= RCTRL_PRSDEP_INIT;
1460 else
1461 tempval &= ~RCTRL_PRSDEP_INIT;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001462 gfar_write(&priv->regs->rctrl, tempval);
1463 }
1464
Dai Haruki77ecaf22008-12-16 15:30:48 -08001465 gfar_change_mtu(dev, dev->mtu);
1466
Andy Flemingfef61082006-04-20 16:44:29 -05001467 spin_unlock_irqrestore(&priv->rxlock, flags);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001468}
1469
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470static int gfar_change_mtu(struct net_device *dev, int new_mtu)
1471{
1472 int tempsize, tempval;
1473 struct gfar_private *priv = netdev_priv(dev);
1474 int oldsize = priv->rx_buffer_size;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001475 int frame_size = new_mtu + ETH_HLEN;
1476
Dai Haruki77ecaf22008-12-16 15:30:48 -08001477 if (priv->vlgrp)
Dai Harukifaa89572008-03-24 10:53:26 -05001478 frame_size += VLAN_HLEN;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001479
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001481 if (netif_msg_drv(priv))
1482 printk(KERN_ERR "%s: Invalid MTU setting\n",
1483 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 return -EINVAL;
1485 }
1486
Dai Haruki77ecaf22008-12-16 15:30:48 -08001487 if (gfar_uses_fcb(priv))
1488 frame_size += GMAC_FCB_LEN;
1489
1490 frame_size += priv->padding;
1491
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 tempsize =
1493 (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
1494 INCREMENTAL_BUFFER_SIZE;
1495
1496 /* Only stop and start the controller if it isn't already
Andy Fleming7f7f5312005-11-11 12:38:59 -06001497 * stopped, and we changed something */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
1499 stop_gfar(dev);
1500
1501 priv->rx_buffer_size = tempsize;
1502
1503 dev->mtu = new_mtu;
1504
1505 gfar_write(&priv->regs->mrblr, priv->rx_buffer_size);
1506 gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size);
1507
1508 /* If the mtu is larger than the max size for standard
1509 * ethernet frames (ie, a jumbo frame), then set maccfg2
1510 * to allow huge frames, and to check the length */
1511 tempval = gfar_read(&priv->regs->maccfg2);
1512
1513 if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE)
1514 tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
1515 else
1516 tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
1517
1518 gfar_write(&priv->regs->maccfg2, tempval);
1519
1520 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
1521 startup_gfar(dev);
1522
1523 return 0;
1524}
1525
Sebastian Siewiorab939902008-08-19 21:12:45 +02001526/* gfar_reset_task gets scheduled when a packet has not been
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 * transmitted after a set amount of time.
1528 * For now, assume that clearing out all the structures, and
Sebastian Siewiorab939902008-08-19 21:12:45 +02001529 * starting over will fix the problem.
1530 */
1531static void gfar_reset_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532{
Sebastian Siewiorab939902008-08-19 21:12:45 +02001533 struct gfar_private *priv = container_of(work, struct gfar_private,
1534 reset_task);
1535 struct net_device *dev = priv->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536
1537 if (dev->flags & IFF_UP) {
1538 stop_gfar(dev);
1539 startup_gfar(dev);
1540 }
1541
David S. Miller263ba322008-07-15 03:47:41 -07001542 netif_tx_schedule_all(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543}
1544
Sebastian Siewiorab939902008-08-19 21:12:45 +02001545static void gfar_timeout(struct net_device *dev)
1546{
1547 struct gfar_private *priv = netdev_priv(dev);
1548
1549 dev->stats.tx_errors++;
1550 schedule_work(&priv->reset_task);
1551}
1552
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553/* Interrupt Handler for Transmit complete */
Andy Flemingf162b9d2008-05-02 13:00:30 -05001554static int gfar_clean_tx_ring(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555{
Dai Harukid080cd62008-04-09 19:37:51 -05001556 struct gfar_private *priv = netdev_priv(dev);
Dai Haruki4669bc92008-12-17 16:51:04 -08001557 struct txbd8 *bdp;
1558 struct txbd8 *lbdp = NULL;
1559 struct txbd8 *base = priv->tx_bd_base;
1560 struct sk_buff *skb;
1561 int skb_dirtytx;
1562 int tx_ring_size = priv->tx_ring_size;
1563 int frags = 0;
1564 int i;
Dai Harukid080cd62008-04-09 19:37:51 -05001565 int howmany = 0;
Dai Haruki4669bc92008-12-17 16:51:04 -08001566 u32 lstatus;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 bdp = priv->dirty_tx;
Dai Haruki4669bc92008-12-17 16:51:04 -08001569 skb_dirtytx = priv->skb_dirtytx;
1570
1571 while ((skb = priv->tx_skbuff[skb_dirtytx])) {
1572 frags = skb_shinfo(skb)->nr_frags;
1573 lbdp = skip_txbd(bdp, frags, base, tx_ring_size);
1574
1575 lstatus = lbdp->lstatus;
1576
1577 /* Only clean completed frames */
1578 if ((lstatus & BD_LFLAG(TXBD_READY)) &&
1579 (lstatus & BD_LENGTH_MASK))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 break;
1581
Dai Haruki4669bc92008-12-17 16:51:04 -08001582 dma_unmap_single(&dev->dev,
1583 bdp->bufPtr,
1584 bdp->length,
1585 DMA_TO_DEVICE);
1586
1587 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
1588 bdp = next_txbd(bdp, base, tx_ring_size);
1589
1590 for (i = 0; i < frags; i++) {
1591 dma_unmap_page(&dev->dev,
1592 bdp->bufPtr,
1593 bdp->length,
1594 DMA_TO_DEVICE);
1595 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
1596 bdp = next_txbd(bdp, base, tx_ring_size);
1597 }
1598
1599 dev_kfree_skb_any(skb);
1600 priv->tx_skbuff[skb_dirtytx] = NULL;
1601
1602 skb_dirtytx = (skb_dirtytx + 1) &
1603 TX_RING_MOD_MASK(tx_ring_size);
1604
Dai Harukid080cd62008-04-09 19:37:51 -05001605 howmany++;
Dai Haruki4669bc92008-12-17 16:51:04 -08001606 priv->num_txbdfree += frags + 1;
1607 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608
Dai Haruki4669bc92008-12-17 16:51:04 -08001609 /* If we freed a buffer, we can restart transmission, if necessary */
1610 if (netif_queue_stopped(dev) && priv->num_txbdfree)
1611 netif_wake_queue(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612
Dai Haruki4669bc92008-12-17 16:51:04 -08001613 /* Update dirty indicators */
1614 priv->skb_dirtytx = skb_dirtytx;
1615 priv->dirty_tx = bdp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
Dai Harukid080cd62008-04-09 19:37:51 -05001617 dev->stats.tx_packets += howmany;
1618
1619 return howmany;
1620}
1621
Dai Haruki8c7396a2008-12-17 16:52:00 -08001622static void gfar_schedule_cleanup(struct net_device *dev)
1623{
1624 struct gfar_private *priv = netdev_priv(dev);
Neil Horman908a7a12008-12-22 20:43:12 -08001625 if (netif_rx_schedule_prep(&priv->napi)) {
Dai Haruki8c7396a2008-12-17 16:52:00 -08001626 gfar_write(&priv->regs->imask, IMASK_RTX_DISABLED);
Neil Horman908a7a12008-12-22 20:43:12 -08001627 __netif_rx_schedule(&priv->napi);
Dai Haruki8c7396a2008-12-17 16:52:00 -08001628 }
1629}
1630
Dai Harukid080cd62008-04-09 19:37:51 -05001631/* Interrupt Handler for Transmit complete */
1632static irqreturn_t gfar_transmit(int irq, void *dev_id)
1633{
Dai Haruki8c7396a2008-12-17 16:52:00 -08001634 gfar_schedule_cleanup((struct net_device *)dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635 return IRQ_HANDLED;
1636}
1637
Andy Fleming815b97c2008-04-22 17:18:29 -05001638static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp,
1639 struct sk_buff *skb)
1640{
1641 struct gfar_private *priv = netdev_priv(dev);
Dai Haruki5a5efed2008-12-16 15:34:50 -08001642 u32 lstatus;
Andy Fleming815b97c2008-04-22 17:18:29 -05001643
1644 bdp->bufPtr = dma_map_single(&dev->dev, skb->data,
1645 priv->rx_buffer_size, DMA_FROM_DEVICE);
1646
Dai Haruki5a5efed2008-12-16 15:34:50 -08001647 lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT);
Andy Fleming815b97c2008-04-22 17:18:29 -05001648
1649 if (bdp == priv->rx_bd_base + priv->rx_ring_size - 1)
Dai Haruki5a5efed2008-12-16 15:34:50 -08001650 lstatus |= BD_LFLAG(RXBD_WRAP);
Andy Fleming815b97c2008-04-22 17:18:29 -05001651
1652 eieio();
1653
Dai Haruki5a5efed2008-12-16 15:34:50 -08001654 bdp->lstatus = lstatus;
Andy Fleming815b97c2008-04-22 17:18:29 -05001655}
1656
1657
1658struct sk_buff * gfar_new_skb(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001660 unsigned int alignamount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661 struct gfar_private *priv = netdev_priv(dev);
1662 struct sk_buff *skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663
1664 /* We have to allocate the skb, so keep trying till we succeed */
Andy Fleming815b97c2008-04-22 17:18:29 -05001665 skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666
Andy Fleming815b97c2008-04-22 17:18:29 -05001667 if (!skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 return NULL;
1669
Andy Fleming7f7f5312005-11-11 12:38:59 -06001670 alignamount = RXBUF_ALIGNMENT -
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001671 (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1));
Andy Fleming7f7f5312005-11-11 12:38:59 -06001672
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673 /* We need the data buffer to be aligned properly. We will reserve
1674 * as many bytes as needed to align the data properly
1675 */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001676 skb_reserve(skb, alignamount);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678 return skb;
1679}
1680
Li Yang298e1a92007-10-16 14:18:13 +08001681static inline void count_errors(unsigned short status, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682{
Li Yang298e1a92007-10-16 14:18:13 +08001683 struct gfar_private *priv = netdev_priv(dev);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001684 struct net_device_stats *stats = &dev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 struct gfar_extra_stats *estats = &priv->extra_stats;
1686
1687 /* If the packet was truncated, none of the other errors
1688 * matter */
1689 if (status & RXBD_TRUNCATED) {
1690 stats->rx_length_errors++;
1691
1692 estats->rx_trunc++;
1693
1694 return;
1695 }
1696 /* Count the errors, if there were any */
1697 if (status & (RXBD_LARGE | RXBD_SHORT)) {
1698 stats->rx_length_errors++;
1699
1700 if (status & RXBD_LARGE)
1701 estats->rx_large++;
1702 else
1703 estats->rx_short++;
1704 }
1705 if (status & RXBD_NONOCTET) {
1706 stats->rx_frame_errors++;
1707 estats->rx_nonoctet++;
1708 }
1709 if (status & RXBD_CRCERR) {
1710 estats->rx_crcerr++;
1711 stats->rx_crc_errors++;
1712 }
1713 if (status & RXBD_OVERRUN) {
1714 estats->rx_overrun++;
1715 stats->rx_crc_errors++;
1716 }
1717}
1718
David Howells7d12e782006-10-05 14:55:46 +01001719irqreturn_t gfar_receive(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720{
Dai Haruki8c7396a2008-12-17 16:52:00 -08001721 gfar_schedule_cleanup((struct net_device *)dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722 return IRQ_HANDLED;
1723}
1724
Kumar Gala0bbaf062005-06-20 10:54:21 -05001725static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb)
1726{
1727 /* If valid headers were found, and valid sums
1728 * were verified, then we tell the kernel that no
1729 * checksumming is necessary. Otherwise, it is */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001730 if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU))
Kumar Gala0bbaf062005-06-20 10:54:21 -05001731 skb->ip_summed = CHECKSUM_UNNECESSARY;
1732 else
1733 skb->ip_summed = CHECKSUM_NONE;
1734}
1735
1736
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737/* gfar_process_frame() -- handle one incoming packet if skb
1738 * isn't NULL. */
1739static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
Dai Haruki2c2db482008-12-16 15:31:15 -08001740 int amount_pull)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741{
1742 struct gfar_private *priv = netdev_priv(dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001743 struct rxfcb *fcb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744
Dai Haruki2c2db482008-12-16 15:31:15 -08001745 int ret;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001746
Dai Haruki2c2db482008-12-16 15:31:15 -08001747 /* fcb is at the beginning if exists */
1748 fcb = (struct rxfcb *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749
Dai Haruki2c2db482008-12-16 15:31:15 -08001750 /* Remove the FCB from the skb */
1751 /* Remove the padded bytes, if there are any */
1752 if (amount_pull)
1753 skb_pull(skb, amount_pull);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001754
Dai Haruki2c2db482008-12-16 15:31:15 -08001755 if (priv->rx_csum_enable)
1756 gfar_rx_checksum(skb, fcb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001757
Dai Haruki2c2db482008-12-16 15:31:15 -08001758 /* Tell the skb what kind of packet this is */
1759 skb->protocol = eth_type_trans(skb, dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001760
Dai Haruki2c2db482008-12-16 15:31:15 -08001761 /* Send the packet up the stack */
1762 if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN)))
1763 ret = vlan_hwaccel_receive_skb(skb, priv->vlgrp, fcb->vlctl);
1764 else
1765 ret = netif_receive_skb(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766
Dai Haruki2c2db482008-12-16 15:31:15 -08001767 if (NET_RX_DROP == ret)
1768 priv->extra_stats.kernel_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769
1770 return 0;
1771}
1772
1773/* gfar_clean_rx_ring() -- Processes each frame in the rx ring
Kumar Gala0bbaf062005-06-20 10:54:21 -05001774 * until the budget/quota has been reached. Returns the number
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 * of frames handled
1776 */
Kumar Gala0bbaf062005-06-20 10:54:21 -05001777int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778{
Andy Fleming31de1982008-12-16 15:33:40 -08001779 struct rxbd8 *bdp, *base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780 struct sk_buff *skb;
Dai Haruki2c2db482008-12-16 15:31:15 -08001781 int pkt_len;
1782 int amount_pull;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783 int howmany = 0;
1784 struct gfar_private *priv = netdev_priv(dev);
1785
1786 /* Get the first full descriptor */
1787 bdp = priv->cur_rx;
Andy Fleming31de1982008-12-16 15:33:40 -08001788 base = priv->rx_bd_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789
Dai Haruki2c2db482008-12-16 15:31:15 -08001790 amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0) +
1791 priv->padding;
1792
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) {
Andy Fleming815b97c2008-04-22 17:18:29 -05001794 struct sk_buff *newskb;
Scott Wood3b6330c2007-05-16 15:06:59 -05001795 rmb();
Andy Fleming815b97c2008-04-22 17:18:29 -05001796
1797 /* Add another skb for the future */
1798 newskb = gfar_new_skb(dev);
1799
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 skb = priv->rx_skbuff[priv->skb_currx];
1801
Andy Fleming81183052008-11-12 10:07:11 -06001802 dma_unmap_single(&priv->dev->dev, bdp->bufPtr,
1803 priv->rx_buffer_size, DMA_FROM_DEVICE);
1804
Andy Fleming815b97c2008-04-22 17:18:29 -05001805 /* We drop the frame if we failed to allocate a new buffer */
1806 if (unlikely(!newskb || !(bdp->status & RXBD_LAST) ||
1807 bdp->status & RXBD_ERR)) {
1808 count_errors(bdp->status, dev);
1809
1810 if (unlikely(!newskb))
1811 newskb = skb;
Andy Fleming8882d9a2008-12-17 16:50:22 -08001812 else if (skb)
Andy Fleming815b97c2008-04-22 17:18:29 -05001813 dev_kfree_skb_any(skb);
Andy Fleming815b97c2008-04-22 17:18:29 -05001814 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815 /* Increment the number of packets */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001816 dev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 howmany++;
1818
Dai Haruki2c2db482008-12-16 15:31:15 -08001819 if (likely(skb)) {
1820 pkt_len = bdp->length - ETH_FCS_LEN;
1821 /* Remove the FCS from the packet length */
1822 skb_put(skb, pkt_len);
1823 dev->stats.rx_bytes += pkt_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824
Dai Haruki2c2db482008-12-16 15:31:15 -08001825 gfar_process_frame(dev, skb, amount_pull);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826
Dai Haruki2c2db482008-12-16 15:31:15 -08001827 } else {
1828 if (netif_msg_rx_err(priv))
1829 printk(KERN_WARNING
1830 "%s: Missing skb!\n", dev->name);
1831 dev->stats.rx_dropped++;
1832 priv->extra_stats.rx_skbmissing++;
1833 }
1834
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 }
1836
Andy Fleming815b97c2008-04-22 17:18:29 -05001837 priv->rx_skbuff[priv->skb_currx] = newskb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838
Andy Fleming815b97c2008-04-22 17:18:29 -05001839 /* Setup the new bdp */
1840 gfar_new_rxbdp(dev, bdp, newskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841
1842 /* Update to the next pointer */
Andy Fleming31de1982008-12-16 15:33:40 -08001843 bdp = next_bd(bdp, base, priv->rx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844
1845 /* update to point at the next skb */
1846 priv->skb_currx =
Andy Fleming815b97c2008-04-22 17:18:29 -05001847 (priv->skb_currx + 1) &
1848 RX_RING_MOD_MASK(priv->rx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 }
1850
1851 /* Update the current rxbd pointer to be the next one */
1852 priv->cur_rx = bdp;
1853
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 return howmany;
1855}
1856
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001857static int gfar_poll(struct napi_struct *napi, int budget)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001859 struct gfar_private *priv = container_of(napi, struct gfar_private, napi);
1860 struct net_device *dev = priv->dev;
Andy Fleming42199882008-12-17 16:52:30 -08001861 int tx_cleaned = 0;
1862 int rx_cleaned = 0;
Dai Harukid080cd62008-04-09 19:37:51 -05001863 unsigned long flags;
1864
Dai Haruki8c7396a2008-12-17 16:52:00 -08001865 /* Clear IEVENT, so interrupts aren't called again
1866 * because of the packets that have already arrived */
1867 gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK);
1868
Dai Harukid080cd62008-04-09 19:37:51 -05001869 /* If we fail to get the lock, don't bother with the TX BDs */
1870 if (spin_trylock_irqsave(&priv->txlock, flags)) {
Andy Fleming42199882008-12-17 16:52:30 -08001871 tx_cleaned = gfar_clean_tx_ring(dev);
Dai Harukid080cd62008-04-09 19:37:51 -05001872 spin_unlock_irqrestore(&priv->txlock, flags);
1873 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874
Andy Fleming42199882008-12-17 16:52:30 -08001875 rx_cleaned = gfar_clean_rx_ring(dev, budget);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876
Andy Fleming42199882008-12-17 16:52:30 -08001877 if (tx_cleaned)
1878 return budget;
1879
1880 if (rx_cleaned < budget) {
Neil Horman908a7a12008-12-22 20:43:12 -08001881 netif_rx_complete(napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882
1883 /* Clear the halt bit in RSTAT */
1884 gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
1885
1886 gfar_write(&priv->regs->imask, IMASK_DEFAULT);
1887
1888 /* If we are coalescing interrupts, update the timer */
1889 /* Otherwise, clear it */
Andy Fleming2f448912008-03-24 10:53:28 -05001890 if (likely(priv->rxcoalescing)) {
1891 gfar_write(&priv->regs->rxic, 0);
Dai Harukib46a8452008-12-16 15:29:52 -08001892 gfar_write(&priv->regs->rxic, priv->rxic);
Andy Fleming2f448912008-03-24 10:53:28 -05001893 }
Dai Haruki8c7396a2008-12-17 16:52:00 -08001894 if (likely(priv->txcoalescing)) {
1895 gfar_write(&priv->regs->txic, 0);
1896 gfar_write(&priv->regs->txic, priv->txic);
1897 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898 }
1899
Andy Fleming42199882008-12-17 16:52:30 -08001900 return rx_cleaned;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902
Vitaly Woolf2d71c22006-11-07 13:27:02 +03001903#ifdef CONFIG_NET_POLL_CONTROLLER
1904/*
1905 * Polling 'interrupt' - used by things like netconsole to send skbs
1906 * without having to re-enable interrupts. It's not called while
1907 * the interrupt routine is executing.
1908 */
1909static void gfar_netpoll(struct net_device *dev)
1910{
1911 struct gfar_private *priv = netdev_priv(dev);
1912
1913 /* If the device has multiple interrupts, run tx/rx */
Andy Flemingb31a1d82008-12-16 15:29:15 -08001914 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Vitaly Woolf2d71c22006-11-07 13:27:02 +03001915 disable_irq(priv->interruptTransmit);
1916 disable_irq(priv->interruptReceive);
1917 disable_irq(priv->interruptError);
1918 gfar_interrupt(priv->interruptTransmit, dev);
1919 enable_irq(priv->interruptError);
1920 enable_irq(priv->interruptReceive);
1921 enable_irq(priv->interruptTransmit);
1922 } else {
1923 disable_irq(priv->interruptTransmit);
1924 gfar_interrupt(priv->interruptTransmit, dev);
1925 enable_irq(priv->interruptTransmit);
1926 }
1927}
1928#endif
1929
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930/* The interrupt handler for devices with one interrupt */
David Howells7d12e782006-10-05 14:55:46 +01001931static irqreturn_t gfar_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932{
1933 struct net_device *dev = dev_id;
1934 struct gfar_private *priv = netdev_priv(dev);
1935
1936 /* Save ievent for future reference */
1937 u32 events = gfar_read(&priv->regs->ievent);
1938
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939 /* Check for reception */
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001940 if (events & IEVENT_RX_MASK)
David Howells7d12e782006-10-05 14:55:46 +01001941 gfar_receive(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942
1943 /* Check for transmit completion */
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001944 if (events & IEVENT_TX_MASK)
David Howells7d12e782006-10-05 14:55:46 +01001945 gfar_transmit(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04001947 /* Check for errors */
1948 if (events & IEVENT_ERR_MASK)
1949 gfar_error(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950
1951 return IRQ_HANDLED;
1952}
1953
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954/* Called every time the controller might need to be made
1955 * aware of new link state. The PHY code conveys this
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001956 * information through variables in the phydev structure, and this
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 * function converts those variables into the appropriate
1958 * register values, and can bring down the device if needed.
1959 */
1960static void adjust_link(struct net_device *dev)
1961{
1962 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -06001963 struct gfar __iomem *regs = priv->regs;
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001964 unsigned long flags;
1965 struct phy_device *phydev = priv->phydev;
1966 int new_state = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967
Andy Flemingfef61082006-04-20 16:44:29 -05001968 spin_lock_irqsave(&priv->txlock, flags);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001969 if (phydev->link) {
1970 u32 tempval = gfar_read(&regs->maccfg2);
Andy Fleming7f7f5312005-11-11 12:38:59 -06001971 u32 ecntrl = gfar_read(&regs->ecntrl);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001972
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 /* Now we make sure that we can be in full duplex mode.
1974 * If not, we operate in half-duplex mode. */
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001975 if (phydev->duplex != priv->oldduplex) {
1976 new_state = 1;
1977 if (!(phydev->duplex))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 tempval &= ~(MACCFG2_FULL_DUPLEX);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001979 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 tempval |= MACCFG2_FULL_DUPLEX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001982 priv->oldduplex = phydev->duplex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 }
1984
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001985 if (phydev->speed != priv->oldspeed) {
1986 new_state = 1;
1987 switch (phydev->speed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988 case 1000:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989 tempval =
1990 ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
Li Yangf430e492009-01-06 14:08:10 -08001991
1992 ecntrl &= ~(ECNTRL_R100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 break;
1994 case 100:
1995 case 10:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 tempval =
1997 ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
Andy Fleming7f7f5312005-11-11 12:38:59 -06001998
1999 /* Reduced mode distinguishes
2000 * between 10 and 100 */
2001 if (phydev->speed == SPEED_100)
2002 ecntrl |= ECNTRL_R100;
2003 else
2004 ecntrl &= ~(ECNTRL_R100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 break;
2006 default:
Kumar Gala0bbaf062005-06-20 10:54:21 -05002007 if (netif_msg_link(priv))
2008 printk(KERN_WARNING
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002009 "%s: Ack! Speed (%d) is not 10/100/1000!\n",
2010 dev->name, phydev->speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 break;
2012 }
2013
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002014 priv->oldspeed = phydev->speed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015 }
2016
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002017 gfar_write(&regs->maccfg2, tempval);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002018 gfar_write(&regs->ecntrl, ecntrl);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002019
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 if (!priv->oldlink) {
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002021 new_state = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022 priv->oldlink = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 }
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002024 } else if (priv->oldlink) {
2025 new_state = 1;
2026 priv->oldlink = 0;
2027 priv->oldspeed = 0;
2028 priv->oldduplex = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002031 if (new_state && netif_msg_link(priv))
2032 phy_print_status(phydev);
2033
Andy Flemingfef61082006-04-20 16:44:29 -05002034 spin_unlock_irqrestore(&priv->txlock, flags);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002035}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036
2037/* Update the hash table based on the current list of multicast
2038 * addresses we subscribe to. Also, change the promiscuity of
2039 * the device based on the flags (this function is called
2040 * whenever dev->flags is changed */
2041static void gfar_set_multi(struct net_device *dev)
2042{
2043 struct dev_mc_list *mc_ptr;
2044 struct gfar_private *priv = netdev_priv(dev);
Kumar Galacc8c6e32006-02-01 15:18:03 -06002045 struct gfar __iomem *regs = priv->regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046 u32 tempval;
2047
2048 if(dev->flags & IFF_PROMISC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049 /* Set RCTRL to PROM */
2050 tempval = gfar_read(&regs->rctrl);
2051 tempval |= RCTRL_PROM;
2052 gfar_write(&regs->rctrl, tempval);
2053 } else {
2054 /* Set RCTRL to not PROM */
2055 tempval = gfar_read(&regs->rctrl);
2056 tempval &= ~(RCTRL_PROM);
2057 gfar_write(&regs->rctrl, tempval);
2058 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002059
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 if(dev->flags & IFF_ALLMULTI) {
2061 /* Set the hash to rx all multicast frames */
Kumar Gala0bbaf062005-06-20 10:54:21 -05002062 gfar_write(&regs->igaddr0, 0xffffffff);
2063 gfar_write(&regs->igaddr1, 0xffffffff);
2064 gfar_write(&regs->igaddr2, 0xffffffff);
2065 gfar_write(&regs->igaddr3, 0xffffffff);
2066 gfar_write(&regs->igaddr4, 0xffffffff);
2067 gfar_write(&regs->igaddr5, 0xffffffff);
2068 gfar_write(&regs->igaddr6, 0xffffffff);
2069 gfar_write(&regs->igaddr7, 0xffffffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070 gfar_write(&regs->gaddr0, 0xffffffff);
2071 gfar_write(&regs->gaddr1, 0xffffffff);
2072 gfar_write(&regs->gaddr2, 0xffffffff);
2073 gfar_write(&regs->gaddr3, 0xffffffff);
2074 gfar_write(&regs->gaddr4, 0xffffffff);
2075 gfar_write(&regs->gaddr5, 0xffffffff);
2076 gfar_write(&regs->gaddr6, 0xffffffff);
2077 gfar_write(&regs->gaddr7, 0xffffffff);
2078 } else {
Andy Fleming7f7f5312005-11-11 12:38:59 -06002079 int em_num;
2080 int idx;
2081
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 /* zero out the hash */
Kumar Gala0bbaf062005-06-20 10:54:21 -05002083 gfar_write(&regs->igaddr0, 0x0);
2084 gfar_write(&regs->igaddr1, 0x0);
2085 gfar_write(&regs->igaddr2, 0x0);
2086 gfar_write(&regs->igaddr3, 0x0);
2087 gfar_write(&regs->igaddr4, 0x0);
2088 gfar_write(&regs->igaddr5, 0x0);
2089 gfar_write(&regs->igaddr6, 0x0);
2090 gfar_write(&regs->igaddr7, 0x0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091 gfar_write(&regs->gaddr0, 0x0);
2092 gfar_write(&regs->gaddr1, 0x0);
2093 gfar_write(&regs->gaddr2, 0x0);
2094 gfar_write(&regs->gaddr3, 0x0);
2095 gfar_write(&regs->gaddr4, 0x0);
2096 gfar_write(&regs->gaddr5, 0x0);
2097 gfar_write(&regs->gaddr6, 0x0);
2098 gfar_write(&regs->gaddr7, 0x0);
2099
Andy Fleming7f7f5312005-11-11 12:38:59 -06002100 /* If we have extended hash tables, we need to
2101 * clear the exact match registers to prepare for
2102 * setting them */
2103 if (priv->extended_hash) {
2104 em_num = GFAR_EM_NUM + 1;
2105 gfar_clear_exact_match(dev);
2106 idx = 1;
2107 } else {
2108 idx = 0;
2109 em_num = 0;
2110 }
2111
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 if(dev->mc_count == 0)
2113 return;
2114
2115 /* Parse the list, and set the appropriate bits */
2116 for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06002117 if (idx < em_num) {
2118 gfar_set_mac_for_addr(dev, idx,
2119 mc_ptr->dmi_addr);
2120 idx++;
2121 } else
2122 gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 }
2124 }
2125
2126 return;
2127}
2128
Andy Fleming7f7f5312005-11-11 12:38:59 -06002129
2130/* Clears each of the exact match registers to zero, so they
2131 * don't interfere with normal reception */
2132static void gfar_clear_exact_match(struct net_device *dev)
2133{
2134 int idx;
2135 u8 zero_arr[MAC_ADDR_LEN] = {0,0,0,0,0,0};
2136
2137 for(idx = 1;idx < GFAR_EM_NUM + 1;idx++)
2138 gfar_set_mac_for_addr(dev, idx, (u8 *)zero_arr);
2139}
2140
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141/* Set the appropriate hash bit for the given addr */
2142/* The algorithm works like so:
2143 * 1) Take the Destination Address (ie the multicast address), and
2144 * do a CRC on it (little endian), and reverse the bits of the
2145 * result.
2146 * 2) Use the 8 most significant bits as a hash into a 256-entry
2147 * table. The table is controlled through 8 32-bit registers:
2148 * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is
2149 * gaddr7. This means that the 3 most significant bits in the
2150 * hash index which gaddr register to use, and the 5 other bits
2151 * indicate which bit (assuming an IBM numbering scheme, which
2152 * for PowerPC (tm) is usually the case) in the register holds
2153 * the entry. */
2154static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
2155{
2156 u32 tempval;
2157 struct gfar_private *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 u32 result = ether_crc(MAC_ADDR_LEN, addr);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002159 int width = priv->hash_width;
2160 u8 whichbit = (result >> (32 - width)) & 0x1f;
2161 u8 whichreg = result >> (32 - width + 5);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162 u32 value = (1 << (31-whichbit));
2163
Kumar Gala0bbaf062005-06-20 10:54:21 -05002164 tempval = gfar_read(priv->hash_regs[whichreg]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165 tempval |= value;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002166 gfar_write(priv->hash_regs[whichreg], tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167
2168 return;
2169}
2170
Andy Fleming7f7f5312005-11-11 12:38:59 -06002171
2172/* There are multiple MAC Address register pairs on some controllers
2173 * This function sets the numth pair to a given address
2174 */
2175static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr)
2176{
2177 struct gfar_private *priv = netdev_priv(dev);
2178 int idx;
2179 char tmpbuf[MAC_ADDR_LEN];
2180 u32 tempval;
Kumar Galacc8c6e32006-02-01 15:18:03 -06002181 u32 __iomem *macptr = &priv->regs->macstnaddr1;
Andy Fleming7f7f5312005-11-11 12:38:59 -06002182
2183 macptr += num*2;
2184
2185 /* Now copy it into the mac registers backwards, cuz */
2186 /* little endian is silly */
2187 for (idx = 0; idx < MAC_ADDR_LEN; idx++)
2188 tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx];
2189
2190 gfar_write(macptr, *((u32 *) (tmpbuf)));
2191
2192 tempval = *((u32 *) (tmpbuf + 4));
2193
2194 gfar_write(macptr+1, tempval);
2195}
2196
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197/* GFAR error interrupt handler */
David Howells7d12e782006-10-05 14:55:46 +01002198static irqreturn_t gfar_error(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199{
2200 struct net_device *dev = dev_id;
2201 struct gfar_private *priv = netdev_priv(dev);
2202
2203 /* Save ievent for future reference */
2204 u32 events = gfar_read(&priv->regs->ievent);
2205
2206 /* Clear IEVENT */
Scott Woodd87eb122008-07-11 18:04:45 -05002207 gfar_write(&priv->regs->ievent, events & IEVENT_ERR_MASK);
2208
2209 /* Magic Packet is not an error. */
Andy Flemingb31a1d82008-12-16 15:29:15 -08002210 if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
Scott Woodd87eb122008-07-11 18:04:45 -05002211 (events & IEVENT_MAG))
2212 events &= ~IEVENT_MAG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213
2214 /* Hmm... */
Kumar Gala0bbaf062005-06-20 10:54:21 -05002215 if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv))
2216 printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n",
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002217 dev->name, events, gfar_read(&priv->regs->imask));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218
2219 /* Update the error counters */
2220 if (events & IEVENT_TXE) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002221 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222
2223 if (events & IEVENT_LC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002224 dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 if (events & IEVENT_CRL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002226 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227 if (events & IEVENT_XFUN) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05002228 if (netif_msg_tx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002229 printk(KERN_DEBUG "%s: TX FIFO underrun, "
2230 "packet dropped.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002231 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 priv->extra_stats.tx_underrun++;
2233
2234 /* Reactivate the Tx Queues */
2235 gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
2236 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05002237 if (netif_msg_tx_err(priv))
2238 printk(KERN_DEBUG "%s: Transmit Error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239 }
2240 if (events & IEVENT_BSY) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002241 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242 priv->extra_stats.rx_bsy++;
2243
David Howells7d12e782006-10-05 14:55:46 +01002244 gfar_receive(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245
Kumar Gala0bbaf062005-06-20 10:54:21 -05002246 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002247 printk(KERN_DEBUG "%s: busy error (rstat: %x)\n",
2248 dev->name, gfar_read(&priv->regs->rstat));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002249 }
2250 if (events & IEVENT_BABR) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002251 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252 priv->extra_stats.rx_babr++;
2253
Kumar Gala0bbaf062005-06-20 10:54:21 -05002254 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002255 printk(KERN_DEBUG "%s: babbling RX error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256 }
2257 if (events & IEVENT_EBERR) {
2258 priv->extra_stats.eberr++;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002259 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002260 printk(KERN_DEBUG "%s: bus error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05002262 if ((events & IEVENT_RXC) && netif_msg_rx_status(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002263 printk(KERN_DEBUG "%s: control frame\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264
2265 if (events & IEVENT_BABT) {
2266 priv->extra_stats.tx_babt++;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002267 if (netif_msg_tx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002268 printk(KERN_DEBUG "%s: babbling TX error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 }
2270 return IRQ_HANDLED;
2271}
2272
Kay Sievers72abb462008-04-18 13:50:44 -07002273/* work with hotplug and coldplug */
2274MODULE_ALIAS("platform:fsl-gianfar");
2275
Andy Flemingb31a1d82008-12-16 15:29:15 -08002276static struct of_device_id gfar_match[] =
2277{
2278 {
2279 .type = "network",
2280 .compatible = "gianfar",
2281 },
2282 {},
2283};
2284
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285/* Structure for a device driver */
Andy Flemingb31a1d82008-12-16 15:29:15 -08002286static struct of_platform_driver gfar_driver = {
2287 .name = "fsl-gianfar",
2288 .match_table = gfar_match,
2289
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 .probe = gfar_probe,
2291 .remove = gfar_remove,
Scott Woodd87eb122008-07-11 18:04:45 -05002292 .suspend = gfar_suspend,
2293 .resume = gfar_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294};
2295
2296static int __init gfar_init(void)
2297{
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002298 int err = gfar_mdio_init();
2299
2300 if (err)
2301 return err;
2302
Andy Flemingb31a1d82008-12-16 15:29:15 -08002303 err = of_register_platform_driver(&gfar_driver);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002304
2305 if (err)
2306 gfar_mdio_exit();
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002307
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002308 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309}
2310
2311static void __exit gfar_exit(void)
2312{
Andy Flemingb31a1d82008-12-16 15:29:15 -08002313 of_unregister_platform_driver(&gfar_driver);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002314 gfar_mdio_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002315}
2316
2317module_init(gfar_init);
2318module_exit(gfar_exit);
2319