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Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[linux-2.6-block.git] / drivers / net / gianfar.c
CommitLineData
0bbaf069 1/*
1da177e4
LT		 2 * drivers/net/gianfar.c
3 *
4 * Gianfar Ethernet Driver
7f7f5316
AF		 5 * This driver is designed for the non-CPM ethernet controllers
6 * on the 85xx and 83xx family of integrated processors
1da177e4
LT		 7 * Based on 8260_io/fcc_enet.c
8 *
9 * Author: Andy Fleming
4c8d3d99 10 * Maintainer: Kumar Gala
a12f801d 11 * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
1da177e4 12 *
6c43e046 13 * Copyright 2002-2009, 2011 Freescale Semiconductor, Inc.
a12f801d 14 * Copyright 2007 MontaVista Software, Inc.
1da177e4
LT		 15 *
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the
18 * Free Software Foundation; either version 2 of the License, or (at your
19 * option) any later version.
20 *
21 * Gianfar: AKA Lambda Draconis, "Dragon"
22 * RA 11 31 24.2
23 * Dec +69 19 52
24 * V 3.84
25 * B-V +1.62
26 *
27 * Theory of operation
0bbaf069 28 *
b31a1d8b
AF		 29 * The driver is initialized through of_device. Configuration information
30 * is therefore conveyed through an OF-style device tree.
1da177e4
LT		 31 *
32 * The Gianfar Ethernet Controller uses a ring of buffer
33 * descriptors. The beginning is indicated by a register
0bbaf069
KG		 34 * pointing to the physical address of the start of the ring.
35 * The end is determined by a "wrap" bit being set in the
1da177e4
LT		 36 * last descriptor of the ring.
37 *
38 * When a packet is received, the RXF bit in the
0bbaf069 39 * IEVENT register is set, triggering an interrupt when the
1da177e4
LT		 40 * corresponding bit in the IMASK register is also set (if
41 * interrupt coalescing is active, then the interrupt may not
42 * happen immediately, but will wait until either a set number
bb40dcbb 43 * of frames or amount of time have passed). In NAPI, the
1da177e4 44 * interrupt handler will signal there is work to be done, and
0aa1538f 45 * exit. This method will start at the last known empty
0bbaf069 46 * descriptor, and process every subsequent descriptor until there
1da177e4
LT		 47 * are none left with data (NAPI will stop after a set number of
48 * packets to give time to other tasks, but will eventually
49 * process all the packets). The data arrives inside a
50 * pre-allocated skb, and so after the skb is passed up to the
51 * stack, a new skb must be allocated, and the address field in
52 * the buffer descriptor must be updated to indicate this new
53 * skb.
54 *
55 * When the kernel requests that a packet be transmitted, the
56 * driver starts where it left off last time, and points the
57 * descriptor at the buffer which was passed in. The driver
58 * then informs the DMA engine that there are packets ready to
59 * be transmitted. Once the controller is finished transmitting
60 * the packet, an interrupt may be triggered (under the same
61 * conditions as for reception, but depending on the TXF bit).
62 * The driver then cleans up the buffer.
63 */
64
1da177e4 65#include <linux/kernel.h>
1da177e4
LT		 66#include <linux/string.h>
67#include <linux/errno.h>
bb40dcbb 68#include <linux/unistd.h>
1da177e4
LT		 69#include <linux/slab.h>
70#include <linux/interrupt.h>
71#include <linux/init.h>
72#include <linux/delay.h>
73#include <linux/netdevice.h>
74#include <linux/etherdevice.h>
75#include <linux/skbuff.h>
0bbaf069 76#include <linux/if_vlan.h>
1da177e4
LT		 77#include <linux/spinlock.h>
78#include <linux/mm.h>
fe192a49 79#include <linux/of_mdio.h>
b31a1d8b 80#include <linux/of_platform.h>
0bbaf069
KG		 81#include <linux/ip.h>
82#include <linux/tcp.h>
83#include <linux/udp.h>
9c07b884 84#include <linux/in.h>
cc772ab7 85#include <linux/net_tstamp.h>
1da177e4
LT		 86
87#include <asm/io.h>
7d350977 88#include <asm/reg.h>
1da177e4
LT		 89#include <asm/irq.h>
90#include <asm/uaccess.h>
91#include <linux/module.h>
1da177e4
LT		 92#include <linux/dma-mapping.h>
93#include <linux/crc32.h>
bb40dcbb
AF		 94#include <linux/mii.h>
95#include <linux/phy.h>
b31a1d8b
AF		 96#include <linux/phy_fixed.h>
97#include <linux/of.h>
4b6ba8aa 98#include <linux/of_net.h>
1da177e4
LT		 99
100#include "gianfar.h"
1577ecef 101#include "fsl_pq_mdio.h"
1da177e4
LT		 102
103#define TX_TIMEOUT (1*HZ)
1da177e4
LT		 104#undef BRIEF_GFAR_ERRORS
105#undef VERBOSE_GFAR_ERRORS
106
1da177e4 107const char gfar_driver_name[] = "Gianfar Ethernet";
7f7f5316 108const char gfar_driver_version[] = "1.3";
1da177e4 109
1da177e4
LT		 110static int gfar_enet_open(struct net_device *dev);
111static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
ab939905 112static void gfar_reset_task(struct work_struct *work);
1da177e4
LT		 113static void gfar_timeout(struct net_device *dev);
114static int gfar_close(struct net_device *dev);
815b97c6 115struct sk_buff *gfar_new_skb(struct net_device *dev);
a12f801d 116static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
815b97c6 117 struct sk_buff *skb);
1da177e4
LT		 118static int gfar_set_mac_address(struct net_device *dev);
119static int gfar_change_mtu(struct net_device *dev, int new_mtu);
7d12e780
DH		 120static irqreturn_t gfar_error(int irq, void *dev_id);
121static irqreturn_t gfar_transmit(int irq, void *dev_id);
122static irqreturn_t gfar_interrupt(int irq, void *dev_id);
1da177e4
LT		 123static void adjust_link(struct net_device *dev);
124static void init_registers(struct net_device *dev);
125static int init_phy(struct net_device *dev);
74888760 126static int gfar_probe(struct platform_device *ofdev);
2dc11581 127static int gfar_remove(struct platform_device *ofdev);
bb40dcbb 128static void free_skb_resources(struct gfar_private *priv);
1da177e4
LT		 129static void gfar_set_multi(struct net_device *dev);
130static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
d3c12873 131static void gfar_configure_serdes(struct net_device *dev);
bea3348e 132static int gfar_poll(struct napi_struct *napi, int budget);
f2d71c2d
VW		 133#ifdef CONFIG_NET_POLL_CONTROLLER
134static void gfar_netpoll(struct net_device *dev);
135#endif
a12f801d
SG		 136int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit);
137static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue);
2c2db48a
DH		 138static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
139 int amount_pull);
0bbaf069
KG		 140static void gfar_vlan_rx_register(struct net_device *netdev,
141 struct vlan_group *grp);
7f7f5316 142void gfar_halt(struct net_device *dev);
d87eb127 143static void gfar_halt_nodisable(struct net_device *dev);
7f7f5316
AF		 144void gfar_start(struct net_device *dev);
145static void gfar_clear_exact_match(struct net_device *dev);
b6bc7650
JP		 146static void gfar_set_mac_for_addr(struct net_device *dev, int num,
147 const u8 *addr);
26ccfc37 148static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
1da177e4 149
1da177e4
LT		 150MODULE_AUTHOR("Freescale Semiconductor, Inc");
151MODULE_DESCRIPTION("Gianfar Ethernet Driver");
152MODULE_LICENSE("GPL");
153
a12f801d 154static void gfar_init_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
8a102fe0
AV		 155 dma_addr_t buf)
156{
8a102fe0
AV		 157 u32 lstatus;
158
159 bdp->bufPtr = buf;
160
161 lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT);
a12f801d 162 if (bdp == rx_queue->rx_bd_base + rx_queue->rx_ring_size - 1)
8a102fe0
AV		 163 lstatus |= BD_LFLAG(RXBD_WRAP);
164
165 eieio();
166
167 bdp->lstatus = lstatus;
168}
169
8728327e 170static int gfar_init_bds(struct net_device *ndev)
826aa4a0 171{
8728327e 172 struct gfar_private *priv = netdev_priv(ndev);
a12f801d
SG		 173 struct gfar_priv_tx_q *tx_queue = NULL;
174 struct gfar_priv_rx_q *rx_queue = NULL;
826aa4a0
AV		 175 struct txbd8 *txbdp;
176 struct rxbd8 *rxbdp;
fba4ed03 177 int i, j;
a12f801d 178
fba4ed03
SG		 179 for (i = 0; i < priv->num_tx_queues; i++) {
180 tx_queue = priv->tx_queue[i];
181 /* Initialize some variables in our dev structure */
182 tx_queue->num_txbdfree = tx_queue->tx_ring_size;
183 tx_queue->dirty_tx = tx_queue->tx_bd_base;
184 tx_queue->cur_tx = tx_queue->tx_bd_base;
185 tx_queue->skb_curtx = 0;
186 tx_queue->skb_dirtytx = 0;
187
188 /* Initialize Transmit Descriptor Ring */
189 txbdp = tx_queue->tx_bd_base;
190 for (j = 0; j < tx_queue->tx_ring_size; j++) {
191 txbdp->lstatus = 0;
192 txbdp->bufPtr = 0;
193 txbdp++;
194 }
8728327e 195
fba4ed03
SG		 196 /* Set the last descriptor in the ring to indicate wrap */
197 txbdp--;
198 txbdp->status |= TXBD_WRAP;
8728327e
AV		 199 }
200
fba4ed03
SG		 201 for (i = 0; i < priv->num_rx_queues; i++) {
202 rx_queue = priv->rx_queue[i];
203 rx_queue->cur_rx = rx_queue->rx_bd_base;
204 rx_queue->skb_currx = 0;
205 rxbdp = rx_queue->rx_bd_base;
8728327e 206
fba4ed03
SG		 207 for (j = 0; j < rx_queue->rx_ring_size; j++) {
208 struct sk_buff *skb = rx_queue->rx_skbuff[j];
8728327e 209
fba4ed03
SG		 210 if (skb) {
211 gfar_init_rxbdp(rx_queue, rxbdp,
212 rxbdp->bufPtr);
213 } else {
214 skb = gfar_new_skb(ndev);
215 if (!skb) {
216 pr_err("%s: Can't allocate RX buffers\n",
217 ndev->name);
218 goto err_rxalloc_fail;
219 }
220 rx_queue->rx_skbuff[j] = skb;
221
222 gfar_new_rxbdp(rx_queue, rxbdp, skb);
8728327e 223 }
8728327e 224
fba4ed03 225 rxbdp++;
8728327e
AV		 226 }
227
8728327e
AV		 228 }
229
230 return 0;
fba4ed03
SG		 231
232err_rxalloc_fail:
233 free_skb_resources(priv);
234 return -ENOMEM;
8728327e
AV		 235}
236
237static int gfar_alloc_skb_resources(struct net_device *ndev)
238{
826aa4a0 239 void *vaddr;
fba4ed03
SG		 240 dma_addr_t addr;
241 int i, j, k;
826aa4a0
AV		 242 struct gfar_private *priv = netdev_priv(ndev);
243 struct device *dev = &priv->ofdev->dev;
a12f801d
SG		 244 struct gfar_priv_tx_q *tx_queue = NULL;
245 struct gfar_priv_rx_q *rx_queue = NULL;
246
fba4ed03
SG		 247 priv->total_tx_ring_size = 0;
248 for (i = 0; i < priv->num_tx_queues; i++)
249 priv->total_tx_ring_size += priv->tx_queue[i]->tx_ring_size;
250
251 priv->total_rx_ring_size = 0;
252 for (i = 0; i < priv->num_rx_queues; i++)
253 priv->total_rx_ring_size += priv->rx_queue[i]->rx_ring_size;
826aa4a0
AV		 254
255 /* Allocate memory for the buffer descriptors */
8728327e 256 vaddr = dma_alloc_coherent(dev,
fba4ed03
SG		 257 sizeof(struct txbd8) * priv->total_tx_ring_size +
258 sizeof(struct rxbd8) * priv->total_rx_ring_size,
259 &addr, GFP_KERNEL);
826aa4a0
AV		 260 if (!vaddr) {
261 if (netif_msg_ifup(priv))
262 pr_err("%s: Could not allocate buffer descriptors!\n",
263 ndev->name);
264 return -ENOMEM;
265 }
266
fba4ed03
SG		 267 for (i = 0; i < priv->num_tx_queues; i++) {
268 tx_queue = priv->tx_queue[i];
269 tx_queue->tx_bd_base = (struct txbd8 *) vaddr;
270 tx_queue->tx_bd_dma_base = addr;
271 tx_queue->dev = ndev;
272 /* enet DMA only understands physical addresses */
273 addr += sizeof(struct txbd8) *tx_queue->tx_ring_size;
274 vaddr += sizeof(struct txbd8) *tx_queue->tx_ring_size;
275 }
826aa4a0 276
826aa4a0 277 /* Start the rx descriptor ring where the tx ring leaves off */
fba4ed03
SG		 278 for (i = 0; i < priv->num_rx_queues; i++) {
279 rx_queue = priv->rx_queue[i];
280 rx_queue->rx_bd_base = (struct rxbd8 *) vaddr;
281 rx_queue->rx_bd_dma_base = addr;
282 rx_queue->dev = ndev;
283 addr += sizeof (struct rxbd8) * rx_queue->rx_ring_size;
284 vaddr += sizeof (struct rxbd8) * rx_queue->rx_ring_size;
285 }
826aa4a0
AV		 286
287 /* Setup the skbuff rings */
fba4ed03
SG		 288 for (i = 0; i < priv->num_tx_queues; i++) {
289 tx_queue = priv->tx_queue[i];
290 tx_queue->tx_skbuff = kmalloc(sizeof(*tx_queue->tx_skbuff) *
a12f801d 291 tx_queue->tx_ring_size, GFP_KERNEL);
fba4ed03
SG		 292 if (!tx_queue->tx_skbuff) {
293 if (netif_msg_ifup(priv))
294 pr_err("%s: Could not allocate tx_skbuff\n",
295 ndev->name);
296 goto cleanup;
297 }
826aa4a0 298
fba4ed03
SG		 299 for (k = 0; k < tx_queue->tx_ring_size; k++)
300 tx_queue->tx_skbuff[k] = NULL;
301 }
826aa4a0 302
fba4ed03
SG		 303 for (i = 0; i < priv->num_rx_queues; i++) {
304 rx_queue = priv->rx_queue[i];
305 rx_queue->rx_skbuff = kmalloc(sizeof(*rx_queue->rx_skbuff) *
a12f801d 306 rx_queue->rx_ring_size, GFP_KERNEL);
826aa4a0 307
fba4ed03
SG		 308 if (!rx_queue->rx_skbuff) {
309 if (netif_msg_ifup(priv))
310 pr_err("%s: Could not allocate rx_skbuff\n",
311 ndev->name);
312 goto cleanup;
313 }
314
315 for (j = 0; j < rx_queue->rx_ring_size; j++)
316 rx_queue->rx_skbuff[j] = NULL;
317 }
826aa4a0 318
8728327e
AV		 319 if (gfar_init_bds(ndev))
320 goto cleanup;
826aa4a0
AV		 321
322 return 0;
323
324cleanup:
325 free_skb_resources(priv);
326 return -ENOMEM;
327}
328
fba4ed03
SG		 329static void gfar_init_tx_rx_base(struct gfar_private *priv)
330{
46ceb60c 331 struct gfar __iomem *regs = priv->gfargrp[0].regs;
18294ad1 332 u32 __iomem *baddr;
fba4ed03
SG		 333 int i;
334
335 baddr = &regs->tbase0;
336 for(i = 0; i < priv->num_tx_queues; i++) {
337 gfar_write(baddr, priv->tx_queue[i]->tx_bd_dma_base);
338 baddr += 2;
339 }
340
341 baddr = &regs->rbase0;
342 for(i = 0; i < priv->num_rx_queues; i++) {
343 gfar_write(baddr, priv->rx_queue[i]->rx_bd_dma_base);
344 baddr += 2;
345 }
346}
347
826aa4a0
AV		 348static void gfar_init_mac(struct net_device *ndev)
349{
350 struct gfar_private *priv = netdev_priv(ndev);
46ceb60c 351 struct gfar __iomem *regs = priv->gfargrp[0].regs;
826aa4a0
AV		 352 u32 rctrl = 0;
353 u32 tctrl = 0;
354 u32 attrs = 0;
355
fba4ed03
SG		 356 /* write the tx/rx base registers */
357 gfar_init_tx_rx_base(priv);
32c513bc 358
826aa4a0 359 /* Configure the coalescing support */
46ceb60c 360 gfar_configure_coalescing(priv, 0xFF, 0xFF);
fba4ed03 361
1ccb8389 362 if (priv->rx_filer_enable) {
fba4ed03 363 rctrl |= RCTRL_FILREN;
1ccb8389
SG		 364 /* Program the RIR0 reg with the required distribution */
365 gfar_write(&regs->rir0, DEFAULT_RIR0);
366 }
826aa4a0 367
8b3afe95 368 if (ndev->features & NETIF_F_RXCSUM)
826aa4a0
AV		 369 rctrl |= RCTRL_CHECKSUMMING;
370
371 if (priv->extended_hash) {
372 rctrl |= RCTRL_EXTHASH;
373
374 gfar_clear_exact_match(ndev);
375 rctrl |= RCTRL_EMEN;
376 }
377
378 if (priv->padding) {
379 rctrl &= ~RCTRL_PAL_MASK;
380 rctrl |= RCTRL_PADDING(priv->padding);
381 }
382
cc772ab7
MR		 383 /* Insert receive time stamps into padding alignment bytes */
384 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) {
385 rctrl &= ~RCTRL_PAL_MASK;
97553f7f 386 rctrl |= RCTRL_PADDING(8);
cc772ab7
MR		 387 priv->padding = 8;
388 }
389
97553f7f
MR		 390 /* Enable HW time stamping if requested from user space */
391 if (priv->hwts_rx_en)
392 rctrl |= RCTRL_PRSDEP_INIT | RCTRL_TS_ENABLE;
393
826aa4a0
AV		 394 /* keep vlan related bits if it's enabled */
395 if (priv->vlgrp) {
396 rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT;
397 tctrl |= TCTRL_VLINS;
398 }
399
400 /* Init rctrl based on our settings */
401 gfar_write(&regs->rctrl, rctrl);
402
403 if (ndev->features & NETIF_F_IP_CSUM)
404 tctrl |= TCTRL_INIT_CSUM;
405
fba4ed03
SG		 406 tctrl |= TCTRL_TXSCHED_PRIO;
407
826aa4a0
AV		 408 gfar_write(&regs->tctrl, tctrl);
409
410 /* Set the extraction length and index */
411 attrs = ATTRELI_EL(priv->rx_stash_size) |
412 ATTRELI_EI(priv->rx_stash_index);
413
414 gfar_write(&regs->attreli, attrs);
415
416 /* Start with defaults, and add stashing or locking
417 * depending on the approprate variables */
418 attrs = ATTR_INIT_SETTINGS;
419
420 if (priv->bd_stash_en)
421 attrs |= ATTR_BDSTASH;
422
423 if (priv->rx_stash_size != 0)
424 attrs |= ATTR_BUFSTASH;
425
426 gfar_write(&regs->attr, attrs);
427
428 gfar_write(&regs->fifo_tx_thr, priv->fifo_threshold);
429 gfar_write(&regs->fifo_tx_starve, priv->fifo_starve);
430 gfar_write(&regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
431}
432
a7f38041
SG		 433static struct net_device_stats *gfar_get_stats(struct net_device *dev)
434{
435 struct gfar_private *priv = netdev_priv(dev);
a7f38041
SG		 436 unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0;
437 unsigned long tx_packets = 0, tx_bytes = 0;
438 int i = 0;
439
440 for (i = 0; i < priv->num_rx_queues; i++) {
441 rx_packets += priv->rx_queue[i]->stats.rx_packets;
442 rx_bytes += priv->rx_queue[i]->stats.rx_bytes;
443 rx_dropped += priv->rx_queue[i]->stats.rx_dropped;
444 }
445
446 dev->stats.rx_packets = rx_packets;
447 dev->stats.rx_bytes = rx_bytes;
448 dev->stats.rx_dropped = rx_dropped;
449
450 for (i = 0; i < priv->num_tx_queues; i++) {
1ac9ad13
ED		 451 tx_bytes += priv->tx_queue[i]->stats.tx_bytes;
452 tx_packets += priv->tx_queue[i]->stats.tx_packets;
a7f38041
SG		 453 }
454
455 dev->stats.tx_bytes = tx_bytes;
456 dev->stats.tx_packets = tx_packets;
457
458 return &dev->stats;
459}
460
26ccfc37
AF		 461static const struct net_device_ops gfar_netdev_ops = {
462 .ndo_open = gfar_enet_open,
463 .ndo_start_xmit = gfar_start_xmit,
464 .ndo_stop = gfar_close,
465 .ndo_change_mtu = gfar_change_mtu,
8b3afe95 466 .ndo_set_features = gfar_set_features,
26ccfc37
AF		 467 .ndo_set_multicast_list = gfar_set_multi,
468 .ndo_tx_timeout = gfar_timeout,
469 .ndo_do_ioctl = gfar_ioctl,
a7f38041 470 .ndo_get_stats = gfar_get_stats,
26ccfc37 471 .ndo_vlan_rx_register = gfar_vlan_rx_register,
240c102d
BH		 472 .ndo_set_mac_address = eth_mac_addr,
473 .ndo_validate_addr = eth_validate_addr,
26ccfc37
AF		 474#ifdef CONFIG_NET_POLL_CONTROLLER
475 .ndo_poll_controller = gfar_netpoll,
476#endif
477};
478
fba4ed03
SG		 479void lock_rx_qs(struct gfar_private *priv)
480{
481 int i = 0x0;
482
483 for (i = 0; i < priv->num_rx_queues; i++)
484 spin_lock(&priv->rx_queue[i]->rxlock);
485}
486
487void lock_tx_qs(struct gfar_private *priv)
488{
489 int i = 0x0;
490
491 for (i = 0; i < priv->num_tx_queues; i++)
492 spin_lock(&priv->tx_queue[i]->txlock);
493}
494
495void unlock_rx_qs(struct gfar_private *priv)
496{
497 int i = 0x0;
498
499 for (i = 0; i < priv->num_rx_queues; i++)
500 spin_unlock(&priv->rx_queue[i]->rxlock);
501}
502
503void unlock_tx_qs(struct gfar_private *priv)
504{
505 int i = 0x0;
506
507 for (i = 0; i < priv->num_tx_queues; i++)
508 spin_unlock(&priv->tx_queue[i]->txlock);
509}
510
7f7f5316
AF		 511/* Returns 1 if incoming frames use an FCB */
512static inline int gfar_uses_fcb(struct gfar_private *priv)
0bbaf069 513{
8b3afe95 514 return priv->vlgrp || (priv->ndev->features & NETIF_F_RXCSUM) ||
cc772ab7 515 (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER);
0bbaf069 516}
bb40dcbb 517
fba4ed03
SG		 518static void free_tx_pointers(struct gfar_private *priv)
519{
520 int i = 0;
521
522 for (i = 0; i < priv->num_tx_queues; i++)
523 kfree(priv->tx_queue[i]);
524}
525
526static void free_rx_pointers(struct gfar_private *priv)
527{
528 int i = 0;
529
530 for (i = 0; i < priv->num_rx_queues; i++)
531 kfree(priv->rx_queue[i]);
532}
533
46ceb60c
SG		 534static void unmap_group_regs(struct gfar_private *priv)
535{
536 int i = 0;
537
538 for (i = 0; i < MAXGROUPS; i++)
539 if (priv->gfargrp[i].regs)
540 iounmap(priv->gfargrp[i].regs);
541}
542
543static void disable_napi(struct gfar_private *priv)
544{
545 int i = 0;
546
547 for (i = 0; i < priv->num_grps; i++)
548 napi_disable(&priv->gfargrp[i].napi);
549}
550
551static void enable_napi(struct gfar_private *priv)
552{
553 int i = 0;
554
555 for (i = 0; i < priv->num_grps; i++)
556 napi_enable(&priv->gfargrp[i].napi);
557}
558
559static int gfar_parse_group(struct device_node *np,
560 struct gfar_private *priv, const char *model)
561{
562 u32 *queue_mask;
46ceb60c 563
7ce97d4f 564 priv->gfargrp[priv->num_grps].regs = of_iomap(np, 0);
46ceb60c
SG		 565 if (!priv->gfargrp[priv->num_grps].regs)
566 return -ENOMEM;
567
568 priv->gfargrp[priv->num_grps].interruptTransmit =
569 irq_of_parse_and_map(np, 0);
570
571 /* If we aren't the FEC we have multiple interrupts */
572 if (model && strcasecmp(model, "FEC")) {
573 priv->gfargrp[priv->num_grps].interruptReceive =
574 irq_of_parse_and_map(np, 1);
575 priv->gfargrp[priv->num_grps].interruptError =
576 irq_of_parse_and_map(np,2);
28cb6ccd
NK		 577 if (priv->gfargrp[priv->num_grps].interruptTransmit == NO_IRQ ||
578 priv->gfargrp[priv->num_grps].interruptReceive == NO_IRQ ||
579 priv->gfargrp[priv->num_grps].interruptError == NO_IRQ)
46ceb60c 580 return -EINVAL;
46ceb60c
SG		 581 }
582
583 priv->gfargrp[priv->num_grps].grp_id = priv->num_grps;
584 priv->gfargrp[priv->num_grps].priv = priv;
585 spin_lock_init(&priv->gfargrp[priv->num_grps].grplock);
586 if(priv->mode == MQ_MG_MODE) {
587 queue_mask = (u32 *)of_get_property(np,
588 "fsl,rx-bit-map", NULL);
589 priv->gfargrp[priv->num_grps].rx_bit_map =
590 queue_mask ? *queue_mask :(DEFAULT_MAPPING >> priv->num_grps);
591 queue_mask = (u32 *)of_get_property(np,
592 "fsl,tx-bit-map", NULL);
593 priv->gfargrp[priv->num_grps].tx_bit_map =
594 queue_mask ? *queue_mask : (DEFAULT_MAPPING >> priv->num_grps);
595 } else {
596 priv->gfargrp[priv->num_grps].rx_bit_map = 0xFF;
597 priv->gfargrp[priv->num_grps].tx_bit_map = 0xFF;
598 }
599 priv->num_grps++;
600
601 return 0;
602}
603
2dc11581 604static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
b31a1d8b 605{
b31a1d8b
AF		 606 const char *model;
607 const char *ctype;
608 const void *mac_addr;
fba4ed03
SG		 609 int err = 0, i;
610 struct net_device *dev = NULL;
611 struct gfar_private *priv = NULL;
61c7a080 612 struct device_node *np = ofdev->dev.of_node;
46ceb60c 613 struct device_node *child = NULL;
4d7902f2
AF		 614 const u32 *stash;
615 const u32 *stash_len;
616 const u32 *stash_idx;
fba4ed03
SG		 617 unsigned int num_tx_qs, num_rx_qs;
618 u32 *tx_queues, *rx_queues;
b31a1d8b
AF		 619
620 if (!np || !of_device_is_available(np))
621 return -ENODEV;
622
fba4ed03
SG		 623 /* parse the num of tx and rx queues */
624 tx_queues = (u32 *)of_get_property(np, "fsl,num_tx_queues", NULL);
625 num_tx_qs = tx_queues ? *tx_queues : 1;
626
627 if (num_tx_qs > MAX_TX_QS) {
628 printk(KERN_ERR "num_tx_qs(=%d) greater than MAX_TX_QS(=%d)\n",
629 num_tx_qs, MAX_TX_QS);
630 printk(KERN_ERR "Cannot do alloc_etherdev, aborting\n");
631 return -EINVAL;
632 }
633
634 rx_queues = (u32 *)of_get_property(np, "fsl,num_rx_queues", NULL);
635 num_rx_qs = rx_queues ? *rx_queues : 1;
636
637 if (num_rx_qs > MAX_RX_QS) {
638 printk(KERN_ERR "num_rx_qs(=%d) greater than MAX_RX_QS(=%d)\n",
639 num_tx_qs, MAX_TX_QS);
640 printk(KERN_ERR "Cannot do alloc_etherdev, aborting\n");
641 return -EINVAL;
642 }
643
644 *pdev = alloc_etherdev_mq(sizeof(*priv), num_tx_qs);
645 dev = *pdev;
646 if (NULL == dev)
647 return -ENOMEM;
648
649 priv = netdev_priv(dev);
61c7a080 650 priv->node = ofdev->dev.of_node;
fba4ed03
SG		 651 priv->ndev = dev;
652
fba4ed03 653 priv->num_tx_queues = num_tx_qs;
fe069123 654 netif_set_real_num_rx_queues(dev, num_rx_qs);
fba4ed03 655 priv->num_rx_queues = num_rx_qs;
46ceb60c 656 priv->num_grps = 0x0;
b31a1d8b
AF		 657
658 model = of_get_property(np, "model", NULL);
659
46ceb60c
SG		 660 for (i = 0; i < MAXGROUPS; i++)
661 priv->gfargrp[i].regs = NULL;
b31a1d8b 662
46ceb60c
SG		 663 /* Parse and initialize group specific information */
664 if (of_device_is_compatible(np, "fsl,etsec2")) {
665 priv->mode = MQ_MG_MODE;
666 for_each_child_of_node(np, child) {
667 err = gfar_parse_group(child, priv, model);
668 if (err)
669 goto err_grp_init;
b31a1d8b 670 }
46ceb60c
SG		 671 } else {
672 priv->mode = SQ_SG_MODE;
673 err = gfar_parse_group(np, priv, model);
674 if(err)
675 goto err_grp_init;
b31a1d8b
AF		 676 }
677
fba4ed03
SG		 678 for (i = 0; i < priv->num_tx_queues; i++)
679 priv->tx_queue[i] = NULL;
680 for (i = 0; i < priv->num_rx_queues; i++)
681 priv->rx_queue[i] = NULL;
682
683 for (i = 0; i < priv->num_tx_queues; i++) {
de47f072
JP		 684 priv->tx_queue[i] = kzalloc(sizeof(struct gfar_priv_tx_q),
685 GFP_KERNEL);
fba4ed03
SG		 686 if (!priv->tx_queue[i]) {
687 err = -ENOMEM;
688 goto tx_alloc_failed;
689 }
690 priv->tx_queue[i]->tx_skbuff = NULL;
691 priv->tx_queue[i]->qindex = i;
692 priv->tx_queue[i]->dev = dev;
693 spin_lock_init(&(priv->tx_queue[i]->txlock));
694 }
695
696 for (i = 0; i < priv->num_rx_queues; i++) {
de47f072
JP		 697 priv->rx_queue[i] = kzalloc(sizeof(struct gfar_priv_rx_q),
698 GFP_KERNEL);
fba4ed03
SG		 699 if (!priv->rx_queue[i]) {
700 err = -ENOMEM;
701 goto rx_alloc_failed;
702 }
703 priv->rx_queue[i]->rx_skbuff = NULL;
704 priv->rx_queue[i]->qindex = i;
705 priv->rx_queue[i]->dev = dev;
706 spin_lock_init(&(priv->rx_queue[i]->rxlock));
707 }
708
709
4d7902f2
AF		 710 stash = of_get_property(np, "bd-stash", NULL);
711
a12f801d 712 if (stash) {
4d7902f2
AF		 713 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING;
714 priv->bd_stash_en = 1;
715 }
716
717 stash_len = of_get_property(np, "rx-stash-len", NULL);
718
719 if (stash_len)
720 priv->rx_stash_size = *stash_len;
721
722 stash_idx = of_get_property(np, "rx-stash-idx", NULL);
723
724 if (stash_idx)
725 priv->rx_stash_index = *stash_idx;
726
727 if (stash_len || stash_idx)
728 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING;
729
b31a1d8b
AF		 730 mac_addr = of_get_mac_address(np);
731 if (mac_addr)
732 memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN);
733
734 if (model && !strcasecmp(model, "TSEC"))
735 priv->device_flags =
736 FSL_GIANFAR_DEV_HAS_GIGABIT |
737 FSL_GIANFAR_DEV_HAS_COALESCE |
738 FSL_GIANFAR_DEV_HAS_RMON |
739 FSL_GIANFAR_DEV_HAS_MULTI_INTR;
740 if (model && !strcasecmp(model, "eTSEC"))
741 priv->device_flags =
742 FSL_GIANFAR_DEV_HAS_GIGABIT |
743 FSL_GIANFAR_DEV_HAS_COALESCE |
744 FSL_GIANFAR_DEV_HAS_RMON |
745 FSL_GIANFAR_DEV_HAS_MULTI_INTR |
2c2db48a 746 FSL_GIANFAR_DEV_HAS_PADDING |
b31a1d8b
AF		 747 FSL_GIANFAR_DEV_HAS_CSUM |
748 FSL_GIANFAR_DEV_HAS_VLAN |
749 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET |
97553f7f
MR		 750 FSL_GIANFAR_DEV_HAS_EXTENDED_HASH |
751 FSL_GIANFAR_DEV_HAS_TIMER;
b31a1d8b
AF		 752
753 ctype = of_get_property(np, "phy-connection-type", NULL);
754
755 /* We only care about rgmii-id. The rest are autodetected */
756 if (ctype && !strcmp(ctype, "rgmii-id"))
757 priv->interface = PHY_INTERFACE_MODE_RGMII_ID;
758 else
759 priv->interface = PHY_INTERFACE_MODE_MII;
760
761 if (of_get_property(np, "fsl,magic-packet", NULL))
762 priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET;
763
fe192a49 764 priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
b31a1d8b
AF		 765
766 /* Find the TBI PHY. If it's not there, we don't support SGMII */
fe192a49 767 priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0);
b31a1d8b
AF		 768
769 return 0;
770
fba4ed03
SG		 771rx_alloc_failed:
772 free_rx_pointers(priv);
773tx_alloc_failed:
774 free_tx_pointers(priv);
46ceb60c
SG		 775err_grp_init:
776 unmap_group_regs(priv);
fba4ed03 777 free_netdev(dev);
b31a1d8b
AF		 778 return err;
779}
780
cc772ab7
MR		 781static int gfar_hwtstamp_ioctl(struct net_device *netdev,
782 struct ifreq *ifr, int cmd)
783{
784 struct hwtstamp_config config;
785 struct gfar_private *priv = netdev_priv(netdev);
786
787 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
788 return -EFAULT;
789
790 /* reserved for future extensions */
791 if (config.flags)
792 return -EINVAL;
793
f0ee7acf
MR		 794 switch (config.tx_type) {
795 case HWTSTAMP_TX_OFF:
796 priv->hwts_tx_en = 0;
797 break;
798 case HWTSTAMP_TX_ON:
799 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
800 return -ERANGE;
801 priv->hwts_tx_en = 1;
802 break;
803 default:
cc772ab7 804 return -ERANGE;
f0ee7acf 805 }
cc772ab7
MR		 806
807 switch (config.rx_filter) {
808 case HWTSTAMP_FILTER_NONE:
97553f7f
MR		 809 if (priv->hwts_rx_en) {
810 stop_gfar(netdev);
811 priv->hwts_rx_en = 0;
812 startup_gfar(netdev);
813 }
cc772ab7
MR		 814 break;
815 default:
816 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
817 return -ERANGE;
97553f7f
MR		 818 if (!priv->hwts_rx_en) {
819 stop_gfar(netdev);
820 priv->hwts_rx_en = 1;
821 startup_gfar(netdev);
822 }
cc772ab7
MR		 823 config.rx_filter = HWTSTAMP_FILTER_ALL;
824 break;
825 }
826
827 return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
828 -EFAULT : 0;
829}
830
0faac9f7
CW		 831/* Ioctl MII Interface */
832static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
833{
834 struct gfar_private *priv = netdev_priv(dev);
835
836 if (!netif_running(dev))
837 return -EINVAL;
838
cc772ab7
MR		 839 if (cmd == SIOCSHWTSTAMP)
840 return gfar_hwtstamp_ioctl(dev, rq, cmd);
841
0faac9f7
CW		 842 if (!priv->phydev)
843 return -ENODEV;
844
28b04113 845 return phy_mii_ioctl(priv->phydev, rq, cmd);
0faac9f7
CW		 846}
847
fba4ed03
SG		 848static unsigned int reverse_bitmap(unsigned int bit_map, unsigned int max_qs)
849{
850 unsigned int new_bit_map = 0x0;
851 int mask = 0x1 << (max_qs - 1), i;
852 for (i = 0; i < max_qs; i++) {
853 if (bit_map & mask)
854 new_bit_map = new_bit_map + (1 << i);
855 mask = mask >> 0x1;
856 }
857 return new_bit_map;
858}
7a8b3372 859
18294ad1
AV		 860static u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar,
861 u32 class)
7a8b3372
SG		 862{
863 u32 rqfpr = FPR_FILER_MASK;
864 u32 rqfcr = 0x0;
865
866 rqfar--;
867 rqfcr = RQFCR_CLE | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
6c43e046
WJB		 868 priv->ftp_rqfpr[rqfar] = rqfpr;
869 priv->ftp_rqfcr[rqfar] = rqfcr;
7a8b3372
SG		 870 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
871
872 rqfar--;
873 rqfcr = RQFCR_CMP_NOMATCH;
6c43e046
WJB		 874 priv->ftp_rqfpr[rqfar] = rqfpr;
875 priv->ftp_rqfcr[rqfar] = rqfcr;
7a8b3372
SG		 876 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
877
878 rqfar--;
879 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND;
880 rqfpr = class;
6c43e046
WJB		 881 priv->ftp_rqfcr[rqfar] = rqfcr;
882 priv->ftp_rqfpr[rqfar] = rqfpr;
7a8b3372
SG		 883 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
884
885 rqfar--;
886 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND;
887 rqfpr = class;
6c43e046
WJB		 888 priv->ftp_rqfcr[rqfar] = rqfcr;
889 priv->ftp_rqfpr[rqfar] = rqfpr;
7a8b3372
SG		 890 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
891
892 return rqfar;
893}
894
895static void gfar_init_filer_table(struct gfar_private *priv)
896{
897 int i = 0x0;
898 u32 rqfar = MAX_FILER_IDX;
899 u32 rqfcr = 0x0;
900 u32 rqfpr = FPR_FILER_MASK;
901
902 /* Default rule */
903 rqfcr = RQFCR_CMP_MATCH;
6c43e046
WJB		 904 priv->ftp_rqfcr[rqfar] = rqfcr;
905 priv->ftp_rqfpr[rqfar] = rqfpr;
7a8b3372
SG		 906 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
907
908 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6);
909 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_UDP);
910 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_TCP);
911 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4);
912 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP);
913 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP);
914
85dd08eb 915 /* cur_filer_idx indicated the first non-masked rule */
7a8b3372
SG		 916 priv->cur_filer_idx = rqfar;
917
918 /* Rest are masked rules */
919 rqfcr = RQFCR_CMP_NOMATCH;
920 for (i = 0; i < rqfar; i++) {
6c43e046
WJB		 921 priv->ftp_rqfcr[i] = rqfcr;
922 priv->ftp_rqfpr[i] = rqfpr;
7a8b3372
SG		 923 gfar_write_filer(priv, i, rqfcr, rqfpr);
924 }
925}
926
7d350977
AV		 927static void gfar_detect_errata(struct gfar_private *priv)
928{
929 struct device *dev = &priv->ofdev->dev;
930 unsigned int pvr = mfspr(SPRN_PVR);
931 unsigned int svr = mfspr(SPRN_SVR);
932 unsigned int mod = (svr >> 16) & 0xfff6; /* w/o E suffix */
933 unsigned int rev = svr & 0xffff;
934
935 /* MPC8313 Rev 2.0 and higher; All MPC837x */
936 if ((pvr == 0x80850010 && mod == 0x80b0 && rev >= 0x0020) ||
937 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
938 priv->errata |= GFAR_ERRATA_74;
939
deb90eac
AV		 940 /* MPC8313 and MPC837x all rev */
941 if ((pvr == 0x80850010 && mod == 0x80b0) ||
942 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
943 priv->errata |= GFAR_ERRATA_76;
944
511d934f
AV		 945 /* MPC8313 and MPC837x all rev */
946 if ((pvr == 0x80850010 && mod == 0x80b0) ||
947 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
948 priv->errata |= GFAR_ERRATA_A002;
949
4363c2fd
AD		 950 /* MPC8313 Rev < 2.0, MPC8548 rev 2.0 */
951 if ((pvr == 0x80850010 && mod == 0x80b0 && rev < 0x0020) ||
952 (pvr == 0x80210020 && mod == 0x8030 && rev == 0x0020))
953 priv->errata |= GFAR_ERRATA_12;
954
7d350977
AV		 955 if (priv->errata)
956 dev_info(dev, "enabled errata workarounds, flags: 0x%x\n",
957 priv->errata);
958}
959
bb40dcbb
AF		 960/* Set up the ethernet device structure, private data,
961 * and anything else we need before we start */
74888760 962static int gfar_probe(struct platform_device *ofdev)
1da177e4
LT		 963{
964 u32 tempval;
965 struct net_device *dev = NULL;
966 struct gfar_private *priv = NULL;
f4983704 967 struct gfar __iomem *regs = NULL;
46ceb60c 968 int err = 0, i, grp_idx = 0;
c50a5d9a 969 int len_devname;
fba4ed03 970 u32 rstat = 0, tstat = 0, rqueue = 0, tqueue = 0;
46ceb60c 971 u32 isrg = 0;
18294ad1 972 u32 __iomem *baddr;
1da177e4 973
fba4ed03 974 err = gfar_of_init(ofdev, &dev);
1da177e4 975
fba4ed03
SG		 976 if (err)
977 return err;
1da177e4
LT		 978
979 priv = netdev_priv(dev);
4826857f
KG		 980 priv->ndev = dev;
981 priv->ofdev = ofdev;
61c7a080 982 priv->node = ofdev->dev.of_node;
4826857f 983 SET_NETDEV_DEV(dev, &ofdev->dev);
1da177e4 984
d87eb127 985 spin_lock_init(&priv->bflock);
ab939905 986 INIT_WORK(&priv->reset_task, gfar_reset_task);
1da177e4 987
b31a1d8b 988 dev_set_drvdata(&ofdev->dev, priv);
46ceb60c 989 regs = priv->gfargrp[0].regs;
1da177e4 990
7d350977
AV		 991 gfar_detect_errata(priv);
992
1da177e4
LT		 993 /* Stop the DMA engine now, in case it was running before */
994 /* (The firmware could have used it, and left it running). */
257d938a 995 gfar_halt(dev);
1da177e4
LT		 996
997 /* Reset MAC layer */
f4983704 998 gfar_write(&regs->maccfg1, MACCFG1_SOFT_RESET);
1da177e4 999
b98ac702
AF		 1000 /* We need to delay at least 3 TX clocks */
1001 udelay(2);
1002
1da177e4 1003 tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
f4983704 1004 gfar_write(&regs->maccfg1, tempval);
1da177e4
LT		 1005
1006 /* Initialize MACCFG2. */
7d350977
AV		 1007 tempval = MACCFG2_INIT_SETTINGS;
1008 if (gfar_has_errata(priv, GFAR_ERRATA_74))
1009 tempval |= MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK;
1010 gfar_write(&regs->maccfg2, tempval);
1da177e4
LT		 1011
1012 /* Initialize ECNTRL */
f4983704 1013 gfar_write(&regs->ecntrl, ECNTRL_INIT_SETTINGS);
1da177e4 1014
1da177e4 1015 /* Set the dev->base_addr to the gfar reg region */
f4983704 1016 dev->base_addr = (unsigned long) regs;
1da177e4 1017
b31a1d8b 1018 SET_NETDEV_DEV(dev, &ofdev->dev);
1da177e4
LT		 1019
1020 /* Fill in the dev structure */
1da177e4 1021 dev->watchdog_timeo = TX_TIMEOUT;
1da177e4 1022 dev->mtu = 1500;
26ccfc37 1023 dev->netdev_ops = &gfar_netdev_ops;
0bbaf069
KG		 1024 dev->ethtool_ops = &gfar_ethtool_ops;
1025
fba4ed03 1026 /* Register for napi ...We are registering NAPI for each grp */
46ceb60c
SG		 1027 for (i = 0; i < priv->num_grps; i++)
1028 netif_napi_add(dev, &priv->gfargrp[i].napi, gfar_poll, GFAR_DEV_WEIGHT);
a12f801d 1029
b31a1d8b 1030 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
8b3afe95
MM		 1031 dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG |
1032 NETIF_F_RXCSUM;
1033 dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG |
1034 NETIF_F_RXCSUM | NETIF_F_HIGHDMA;
1035 }
0bbaf069
KG		 1036
1037 priv->vlgrp = NULL;
1da177e4 1038
26ccfc37 1039 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN)
0bbaf069 1040 dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
0bbaf069 1041
b31a1d8b 1042 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
0bbaf069
KG		 1043 priv->extended_hash = 1;
1044 priv->hash_width = 9;
1045
f4983704
SG		 1046 priv->hash_regs[0] = &regs->igaddr0;
1047 priv->hash_regs[1] = &regs->igaddr1;
1048 priv->hash_regs[2] = &regs->igaddr2;
1049 priv->hash_regs[3] = &regs->igaddr3;
1050 priv->hash_regs[4] = &regs->igaddr4;
1051 priv->hash_regs[5] = &regs->igaddr5;
1052 priv->hash_regs[6] = &regs->igaddr6;
1053 priv->hash_regs[7] = &regs->igaddr7;
1054 priv->hash_regs[8] = &regs->gaddr0;
1055 priv->hash_regs[9] = &regs->gaddr1;
1056 priv->hash_regs[10] = &regs->gaddr2;
1057 priv->hash_regs[11] = &regs->gaddr3;
1058 priv->hash_regs[12] = &regs->gaddr4;
1059 priv->hash_regs[13] = &regs->gaddr5;
1060 priv->hash_regs[14] = &regs->gaddr6;
1061 priv->hash_regs[15] = &regs->gaddr7;
0bbaf069
KG		 1062
1063 } else {
1064 priv->extended_hash = 0;
1065 priv->hash_width = 8;
1066
f4983704
SG		 1067 priv->hash_regs[0] = &regs->gaddr0;
1068 priv->hash_regs[1] = &regs->gaddr1;
1069 priv->hash_regs[2] = &regs->gaddr2;
1070 priv->hash_regs[3] = &regs->gaddr3;
1071 priv->hash_regs[4] = &regs->gaddr4;
1072 priv->hash_regs[5] = &regs->gaddr5;
1073 priv->hash_regs[6] = &regs->gaddr6;
1074 priv->hash_regs[7] = &regs->gaddr7;
0bbaf069
KG		 1075 }
1076
b31a1d8b 1077 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING)
0bbaf069
KG		 1078 priv->padding = DEFAULT_PADDING;
1079 else
1080 priv->padding = 0;
1081
cc772ab7
MR		 1082 if (dev->features & NETIF_F_IP_CSUM ||
1083 priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)
0bbaf069 1084 dev->hard_header_len += GMAC_FCB_LEN;
1da177e4 1085
46ceb60c
SG		 1086 /* Program the isrg regs only if number of grps > 1 */
1087 if (priv->num_grps > 1) {
1088 baddr = &regs->isrg0;
1089 for (i = 0; i < priv->num_grps; i++) {
1090 isrg |= (priv->gfargrp[i].rx_bit_map << ISRG_SHIFT_RX);
1091 isrg |= (priv->gfargrp[i].tx_bit_map << ISRG_SHIFT_TX);
1092 gfar_write(baddr, isrg);
1093 baddr++;
1094 isrg = 0x0;
1095 }
1096 }
1097
fba4ed03 1098 /* Need to reverse the bit maps as bit_map's MSB is q0
984b3f57 1099 * but, for_each_set_bit parses from right to left, which
fba4ed03 1100 * basically reverses the queue numbers */
46ceb60c
SG		 1101 for (i = 0; i< priv->num_grps; i++) {
1102 priv->gfargrp[i].tx_bit_map = reverse_bitmap(
1103 priv->gfargrp[i].tx_bit_map, MAX_TX_QS);
1104 priv->gfargrp[i].rx_bit_map = reverse_bitmap(
1105 priv->gfargrp[i].rx_bit_map, MAX_RX_QS);
1106 }
1107
1108 /* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values,
1109 * also assign queues to groups */
1110 for (grp_idx = 0; grp_idx < priv->num_grps; grp_idx++) {
1111 priv->gfargrp[grp_idx].num_rx_queues = 0x0;
984b3f57 1112 for_each_set_bit(i, &priv->gfargrp[grp_idx].rx_bit_map,
46ceb60c
SG		 1113 priv->num_rx_queues) {
1114 priv->gfargrp[grp_idx].num_rx_queues++;
1115 priv->rx_queue[i]->grp = &priv->gfargrp[grp_idx];
1116 rstat = rstat | (RSTAT_CLEAR_RHALT >> i);
1117 rqueue = rqueue | ((RQUEUE_EN0 | RQUEUE_EX0) >> i);
1118 }
1119 priv->gfargrp[grp_idx].num_tx_queues = 0x0;
984b3f57 1120 for_each_set_bit(i, &priv->gfargrp[grp_idx].tx_bit_map,
46ceb60c
SG		 1121 priv->num_tx_queues) {
1122 priv->gfargrp[grp_idx].num_tx_queues++;
1123 priv->tx_queue[i]->grp = &priv->gfargrp[grp_idx];
1124 tstat = tstat | (TSTAT_CLEAR_THALT >> i);
1125 tqueue = tqueue | (TQUEUE_EN0 >> i);
1126 }
1127 priv->gfargrp[grp_idx].rstat = rstat;
1128 priv->gfargrp[grp_idx].tstat = tstat;
1129 rstat = tstat =0;
fba4ed03 1130 }
fba4ed03
SG		 1131
1132 gfar_write(&regs->rqueue, rqueue);
1133 gfar_write(&regs->tqueue, tqueue);
1134
1da177e4 1135 priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
1da177e4 1136
a12f801d 1137 /* Initializing some of the rx/tx queue level parameters */
fba4ed03
SG		 1138 for (i = 0; i < priv->num_tx_queues; i++) {
1139 priv->tx_queue[i]->tx_ring_size = DEFAULT_TX_RING_SIZE;
1140 priv->tx_queue[i]->num_txbdfree = DEFAULT_TX_RING_SIZE;
1141 priv->tx_queue[i]->txcoalescing = DEFAULT_TX_COALESCE;
1142 priv->tx_queue[i]->txic = DEFAULT_TXIC;
1143 }
a12f801d 1144
fba4ed03
SG		 1145 for (i = 0; i < priv->num_rx_queues; i++) {
1146 priv->rx_queue[i]->rx_ring_size = DEFAULT_RX_RING_SIZE;
1147 priv->rx_queue[i]->rxcoalescing = DEFAULT_RX_COALESCE;
1148 priv->rx_queue[i]->rxic = DEFAULT_RXIC;
1149 }
1da177e4 1150
1ccb8389
SG		 1151 /* enable filer if using multiple RX queues*/
1152 if(priv->num_rx_queues > 1)
1153 priv->rx_filer_enable = 1;
0bbaf069
KG		 1154 /* Enable most messages by default */
1155 priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1156
d3eab82b
TP		 1157 /* Carrier starts down, phylib will bring it up */
1158 netif_carrier_off(dev);
1159
1da177e4
LT		 1160 err = register_netdev(dev);
1161
1162 if (err) {
1163 printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
1164 dev->name);
1165 goto register_fail;
1166 }
1167
2884e5cc
AV		 1168 device_init_wakeup(&dev->dev,
1169 priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1170
c50a5d9a
DH		 1171 /* fill out IRQ number and name fields */
1172 len_devname = strlen(dev->name);
46ceb60c
SG		 1173 for (i = 0; i < priv->num_grps; i++) {
1174 strncpy(&priv->gfargrp[i].int_name_tx[0], dev->name,
1175 len_devname);
1176 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1177 strncpy(&priv->gfargrp[i].int_name_tx[len_devname],
1178 "_g", sizeof("_g"));
1179 priv->gfargrp[i].int_name_tx[
1180 strlen(priv->gfargrp[i].int_name_tx)] = i+48;
1181 strncpy(&priv->gfargrp[i].int_name_tx[strlen(
1182 priv->gfargrp[i].int_name_tx)],
1183 "_tx", sizeof("_tx") + 1);
1184
1185 strncpy(&priv->gfargrp[i].int_name_rx[0], dev->name,
1186 len_devname);
1187 strncpy(&priv->gfargrp[i].int_name_rx[len_devname],
1188 "_g", sizeof("_g"));
1189 priv->gfargrp[i].int_name_rx[
1190 strlen(priv->gfargrp[i].int_name_rx)] = i+48;
1191 strncpy(&priv->gfargrp[i].int_name_rx[strlen(
1192 priv->gfargrp[i].int_name_rx)],
1193 "_rx", sizeof("_rx") + 1);
1194
1195 strncpy(&priv->gfargrp[i].int_name_er[0], dev->name,
1196 len_devname);
1197 strncpy(&priv->gfargrp[i].int_name_er[len_devname],
1198 "_g", sizeof("_g"));
1199 priv->gfargrp[i].int_name_er[strlen(
1200 priv->gfargrp[i].int_name_er)] = i+48;
1201 strncpy(&priv->gfargrp[i].int_name_er[strlen(\
1202 priv->gfargrp[i].int_name_er)],
1203 "_er", sizeof("_er") + 1);
1204 } else
1205 priv->gfargrp[i].int_name_tx[len_devname] = '\0';
1206 }
c50a5d9a 1207
7a8b3372
SG		 1208 /* Initialize the filer table */
1209 gfar_init_filer_table(priv);
1210
7f7f5316
AF		 1211 /* Create all the sysfs files */
1212 gfar_init_sysfs(dev);
1213
1da177e4 1214 /* Print out the device info */
e174961c 1215 printk(KERN_INFO DEVICE_NAME "%pM\n", dev->name, dev->dev_addr);
1da177e4
LT		 1216
1217 /* Even more device info helps when determining which kernel */
7f7f5316 1218 /* provided which set of benchmarks. */
1da177e4 1219 printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name);
fba4ed03 1220 for (i = 0; i < priv->num_rx_queues; i++)
ddc01b3b 1221 printk(KERN_INFO "%s: RX BD ring size for Q[%d]: %d\n",
fba4ed03
SG		 1222 dev->name, i, priv->rx_queue[i]->rx_ring_size);
1223 for(i = 0; i < priv->num_tx_queues; i++)
ddc01b3b 1224 printk(KERN_INFO "%s: TX BD ring size for Q[%d]: %d\n",
fba4ed03 1225 dev->name, i, priv->tx_queue[i]->tx_ring_size);
1da177e4
LT		 1226
1227 return 0;
1228
1229register_fail:
46ceb60c 1230 unmap_group_regs(priv);
fba4ed03
SG		 1231 free_tx_pointers(priv);
1232 free_rx_pointers(priv);
fe192a49
GL		 1233 if (priv->phy_node)
1234 of_node_put(priv->phy_node);
1235 if (priv->tbi_node)
1236 of_node_put(priv->tbi_node);
1da177e4 1237 free_netdev(dev);
bb40dcbb 1238 return err;
1da177e4
LT		 1239}
1240
2dc11581 1241static int gfar_remove(struct platform_device *ofdev)
1da177e4 1242{
b31a1d8b 1243 struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
1da177e4 1244
fe192a49
GL		 1245 if (priv->phy_node)
1246 of_node_put(priv->phy_node);
1247 if (priv->tbi_node)
1248 of_node_put(priv->tbi_node);
1249
b31a1d8b 1250 dev_set_drvdata(&ofdev->dev, NULL);
1da177e4 1251
d9d8e041 1252 unregister_netdev(priv->ndev);
46ceb60c 1253 unmap_group_regs(priv);
4826857f 1254 free_netdev(priv->ndev);
1da177e4
LT		 1255
1256 return 0;
1257}
1258
d87eb127 1259#ifdef CONFIG_PM
be926fc4
AV		 1260
1261static int gfar_suspend(struct device *dev)
d87eb127 1262{
be926fc4
AV		 1263 struct gfar_private *priv = dev_get_drvdata(dev);
1264 struct net_device *ndev = priv->ndev;
46ceb60c 1265 struct gfar __iomem *regs = priv->gfargrp[0].regs;
d87eb127
SW		 1266 unsigned long flags;
1267 u32 tempval;
1268
1269 int magic_packet = priv->wol_en &&
b31a1d8b 1270 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
d87eb127 1271
be926fc4 1272 netif_device_detach(ndev);
d87eb127 1273
be926fc4 1274 if (netif_running(ndev)) {
fba4ed03
SG		 1275
1276 local_irq_save(flags);
1277 lock_tx_qs(priv);
1278 lock_rx_qs(priv);
d87eb127 1279
be926fc4 1280 gfar_halt_nodisable(ndev);
d87eb127
SW		 1281
1282 /* Disable Tx, and Rx if wake-on-LAN is disabled. */
f4983704 1283 tempval = gfar_read(&regs->maccfg1);
d87eb127
SW		 1284
1285 tempval &= ~MACCFG1_TX_EN;
1286
1287 if (!magic_packet)
1288 tempval &= ~MACCFG1_RX_EN;
1289
f4983704 1290 gfar_write(&regs->maccfg1, tempval);
d87eb127 1291
fba4ed03
SG		 1292 unlock_rx_qs(priv);
1293 unlock_tx_qs(priv);
1294 local_irq_restore(flags);
d87eb127 1295
46ceb60c 1296 disable_napi(priv);
d87eb127
SW		 1297
1298 if (magic_packet) {
1299 /* Enable interrupt on Magic Packet */
f4983704 1300 gfar_write(&regs->imask, IMASK_MAG);
d87eb127
SW		 1301
1302 /* Enable Magic Packet mode */
f4983704 1303 tempval = gfar_read(&regs->maccfg2);
d87eb127 1304 tempval |= MACCFG2_MPEN;
f4983704 1305 gfar_write(&regs->maccfg2, tempval);
d87eb127
SW		 1306 } else {
1307 phy_stop(priv->phydev);
1308 }
1309 }
1310
1311 return 0;
1312}
1313
be926fc4 1314static int gfar_resume(struct device *dev)
d87eb127 1315{
be926fc4
AV		 1316 struct gfar_private *priv = dev_get_drvdata(dev);
1317 struct net_device *ndev = priv->ndev;
46ceb60c 1318 struct gfar __iomem *regs = priv->gfargrp[0].regs;
d87eb127
SW		 1319 unsigned long flags;
1320 u32 tempval;
1321 int magic_packet = priv->wol_en &&
b31a1d8b 1322 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
d87eb127 1323
be926fc4
AV		 1324 if (!netif_running(ndev)) {
1325 netif_device_attach(ndev);
d87eb127
SW		 1326 return 0;
1327 }
1328
1329 if (!magic_packet && priv->phydev)
1330 phy_start(priv->phydev);
1331
1332 /* Disable Magic Packet mode, in case something
1333 * else woke us up.
1334 */
fba4ed03
SG		 1335 local_irq_save(flags);
1336 lock_tx_qs(priv);
1337 lock_rx_qs(priv);
d87eb127 1338
f4983704 1339 tempval = gfar_read(&regs->maccfg2);
d87eb127 1340 tempval &= ~MACCFG2_MPEN;
f4983704 1341 gfar_write(&regs->maccfg2, tempval);
d87eb127 1342
be926fc4 1343 gfar_start(ndev);
d87eb127 1344
fba4ed03
SG		 1345 unlock_rx_qs(priv);
1346 unlock_tx_qs(priv);
1347 local_irq_restore(flags);
d87eb127 1348
be926fc4
AV		 1349 netif_device_attach(ndev);
1350
46ceb60c 1351 enable_napi(priv);
be926fc4
AV		 1352
1353 return 0;
1354}
1355
1356static int gfar_restore(struct device *dev)
1357{
1358 struct gfar_private *priv = dev_get_drvdata(dev);
1359 struct net_device *ndev = priv->ndev;
1360
1361 if (!netif_running(ndev))
1362 return 0;
1363
1364 gfar_init_bds(ndev);
1365 init_registers(ndev);
1366 gfar_set_mac_address(ndev);
1367 gfar_init_mac(ndev);
1368 gfar_start(ndev);
1369
1370 priv->oldlink = 0;
1371 priv->oldspeed = 0;
1372 priv->oldduplex = -1;
1373
1374 if (priv->phydev)
1375 phy_start(priv->phydev);
d87eb127 1376
be926fc4 1377 netif_device_attach(ndev);
5ea681d4 1378 enable_napi(priv);
d87eb127
SW		 1379
1380 return 0;
1381}
be926fc4
AV		 1382
1383static struct dev_pm_ops gfar_pm_ops = {
1384 .suspend = gfar_suspend,
1385 .resume = gfar_resume,
1386 .freeze = gfar_suspend,
1387 .thaw = gfar_resume,
1388 .restore = gfar_restore,
1389};
1390
1391#define GFAR_PM_OPS (&gfar_pm_ops)
1392
d87eb127 1393#else
be926fc4
AV		 1394
1395#define GFAR_PM_OPS NULL
be926fc4 1396
d87eb127 1397#endif
1da177e4 1398
e8a2b6a4
AF		 1399/* Reads the controller's registers to determine what interface
1400 * connects it to the PHY.
1401 */
1402static phy_interface_t gfar_get_interface(struct net_device *dev)
1403{
1404 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 1405 struct gfar __iomem *regs = priv->gfargrp[0].regs;
f4983704
SG		 1406 u32 ecntrl;
1407
f4983704 1408 ecntrl = gfar_read(&regs->ecntrl);
e8a2b6a4
AF		 1409
1410 if (ecntrl & ECNTRL_SGMII_MODE)
1411 return PHY_INTERFACE_MODE_SGMII;
1412
1413 if (ecntrl & ECNTRL_TBI_MODE) {
1414 if (ecntrl & ECNTRL_REDUCED_MODE)
1415 return PHY_INTERFACE_MODE_RTBI;
1416 else
1417 return PHY_INTERFACE_MODE_TBI;
1418 }
1419
1420 if (ecntrl & ECNTRL_REDUCED_MODE) {
1421 if (ecntrl & ECNTRL_REDUCED_MII_MODE)
1422 return PHY_INTERFACE_MODE_RMII;
7132ab7f 1423 else {
b31a1d8b 1424 phy_interface_t interface = priv->interface;
7132ab7f
AF		 1425
1426 /*
1427 * This isn't autodetected right now, so it must
1428 * be set by the device tree or platform code.
1429 */
1430 if (interface == PHY_INTERFACE_MODE_RGMII_ID)
1431 return PHY_INTERFACE_MODE_RGMII_ID;
1432
e8a2b6a4 1433 return PHY_INTERFACE_MODE_RGMII;
7132ab7f 1434 }
e8a2b6a4
AF		 1435 }
1436
b31a1d8b 1437 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
e8a2b6a4
AF		 1438 return PHY_INTERFACE_MODE_GMII;
1439
1440 return PHY_INTERFACE_MODE_MII;
1441}
1442
1443
bb40dcbb
AF		 1444/* Initializes driver's PHY state, and attaches to the PHY.
1445 * Returns 0 on success.
1da177e4
LT		 1446 */
1447static int init_phy(struct net_device *dev)
1448{
1449 struct gfar_private *priv = netdev_priv(dev);
bb40dcbb 1450 uint gigabit_support =
b31a1d8b 1451 priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
bb40dcbb 1452 SUPPORTED_1000baseT_Full : 0;
e8a2b6a4 1453 phy_interface_t interface;
1da177e4
LT		 1454
1455 priv->oldlink = 0;
1456 priv->oldspeed = 0;
1457 priv->oldduplex = -1;
1458
e8a2b6a4
AF		 1459 interface = gfar_get_interface(dev);
1460
1db780f8
AV		 1461 priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0,
1462 interface);
1463 if (!priv->phydev)
1464 priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link,
1465 interface);
1466 if (!priv->phydev) {
1467 dev_err(&dev->dev, "could not attach to PHY\n");
1468 return -ENODEV;
fe192a49 1469 }
1da177e4 1470
d3c12873
KJ		 1471 if (interface == PHY_INTERFACE_MODE_SGMII)
1472 gfar_configure_serdes(dev);
1473
bb40dcbb 1474 /* Remove any features not supported by the controller */
fe192a49
GL		 1475 priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
1476 priv->phydev->advertising = priv->phydev->supported;
1da177e4
LT		 1477
1478 return 0;
1da177e4
LT		 1479}
1480
d0313587
PG		 1481/*
1482 * Initialize TBI PHY interface for communicating with the
1483 * SERDES lynx PHY on the chip. We communicate with this PHY
1484 * through the MDIO bus on each controller, treating it as a
1485 * "normal" PHY at the address found in the TBIPA register. We assume
1486 * that the TBIPA register is valid. Either the MDIO bus code will set
1487 * it to a value that doesn't conflict with other PHYs on the bus, or the
1488 * value doesn't matter, as there are no other PHYs on the bus.
1489 */
d3c12873
KJ		 1490static void gfar_configure_serdes(struct net_device *dev)
1491{
1492 struct gfar_private *priv = netdev_priv(dev);
fe192a49
GL		 1493 struct phy_device *tbiphy;
1494
1495 if (!priv->tbi_node) {
1496 dev_warn(&dev->dev, "error: SGMII mode requires that the "
1497 "device tree specify a tbi-handle\n");
1498 return;
1499 }
c132419e 1500
fe192a49
GL		 1501 tbiphy = of_phy_find_device(priv->tbi_node);
1502 if (!tbiphy) {
1503 dev_err(&dev->dev, "error: Could not get TBI device\n");
b31a1d8b
AF		 1504 return;
1505 }
d3c12873 1506
b31a1d8b
AF		 1507 /*
1508 * If the link is already up, we must already be ok, and don't need to
bdb59f94
TP		 1509 * configure and reset the TBI<->SerDes link. Maybe U-Boot configured
1510 * everything for us? Resetting it takes the link down and requires
1511 * several seconds for it to come back.
1512 */
fe192a49 1513 if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS)
b31a1d8b 1514 return;
d3c12873 1515
d0313587 1516 /* Single clk mode, mii mode off(for serdes communication) */
fe192a49 1517 phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT);
d3c12873 1518
fe192a49 1519 phy_write(tbiphy, MII_ADVERTISE,
d3c12873
KJ		 1520 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1521 ADVERTISE_1000XPSE_ASYM);
1522
fe192a49 1523 phy_write(tbiphy, MII_BMCR, BMCR_ANENABLE |
d3c12873
KJ		 1524 BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000);
1525}
1526
1da177e4
LT		 1527static void init_registers(struct net_device *dev)
1528{
1529 struct gfar_private *priv = netdev_priv(dev);
f4983704 1530 struct gfar __iomem *regs = NULL;
46ceb60c 1531 int i = 0;
1da177e4 1532
46ceb60c
SG		 1533 for (i = 0; i < priv->num_grps; i++) {
1534 regs = priv->gfargrp[i].regs;
1535 /* Clear IEVENT */
1536 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
1da177e4 1537
46ceb60c
SG		 1538 /* Initialize IMASK */
1539 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1540 }
1da177e4 1541
46ceb60c 1542 regs = priv->gfargrp[0].regs;
1da177e4 1543 /* Init hash registers to zero */
f4983704
SG		 1544 gfar_write(&regs->igaddr0, 0);
1545 gfar_write(&regs->igaddr1, 0);
1546 gfar_write(&regs->igaddr2, 0);
1547 gfar_write(&regs->igaddr3, 0);
1548 gfar_write(&regs->igaddr4, 0);
1549 gfar_write(&regs->igaddr5, 0);
1550 gfar_write(&regs->igaddr6, 0);
1551 gfar_write(&regs->igaddr7, 0);
1552
1553 gfar_write(&regs->gaddr0, 0);
1554 gfar_write(&regs->gaddr1, 0);
1555 gfar_write(&regs->gaddr2, 0);
1556 gfar_write(&regs->gaddr3, 0);
1557 gfar_write(&regs->gaddr4, 0);
1558 gfar_write(&regs->gaddr5, 0);
1559 gfar_write(&regs->gaddr6, 0);
1560 gfar_write(&regs->gaddr7, 0);
1da177e4 1561
1da177e4 1562 /* Zero out the rmon mib registers if it has them */
b31a1d8b 1563 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
f4983704 1564 memset_io(&(regs->rmon), 0, sizeof (struct rmon_mib));
1da177e4
LT		 1565
1566 /* Mask off the CAM interrupts */
f4983704
SG		 1567 gfar_write(&regs->rmon.cam1, 0xffffffff);
1568 gfar_write(&regs->rmon.cam2, 0xffffffff);
1da177e4
LT		 1569 }
1570
1571 /* Initialize the max receive buffer length */
f4983704 1572 gfar_write(&regs->mrblr, priv->rx_buffer_size);
1da177e4 1573
1da177e4 1574 /* Initialize the Minimum Frame Length Register */
f4983704 1575 gfar_write(&regs->minflr, MINFLR_INIT_SETTINGS);
1da177e4
LT		 1576}
1577
511d934f
AV		 1578static int __gfar_is_rx_idle(struct gfar_private *priv)
1579{
1580 u32 res;
1581
1582 /*
1583 * Normaly TSEC should not hang on GRS commands, so we should
1584 * actually wait for IEVENT_GRSC flag.
1585 */
1586 if (likely(!gfar_has_errata(priv, GFAR_ERRATA_A002)))
1587 return 0;
1588
1589 /*
1590 * Read the eTSEC register at offset 0xD1C. If bits 7-14 are
1591 * the same as bits 23-30, the eTSEC Rx is assumed to be idle
1592 * and the Rx can be safely reset.
1593 */
1594 res = gfar_read((void __iomem *)priv->gfargrp[0].regs + 0xd1c);
1595 res &= 0x7f807f80;
1596 if ((res & 0xffff) == (res >> 16))
1597 return 1;
1598
1599 return 0;
1600}
0bbaf069
KG		 1601
1602/* Halt the receive and transmit queues */
d87eb127 1603static void gfar_halt_nodisable(struct net_device *dev)
1da177e4
LT		 1604{
1605 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 1606 struct gfar __iomem *regs = NULL;
1da177e4 1607 u32 tempval;
46ceb60c 1608 int i = 0;
1da177e4 1609
46ceb60c
SG		 1610 for (i = 0; i < priv->num_grps; i++) {
1611 regs = priv->gfargrp[i].regs;
1612 /* Mask all interrupts */
1613 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1da177e4 1614
46ceb60c
SG		 1615 /* Clear all interrupts */
1616 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
1617 }
1da177e4 1618
46ceb60c 1619 regs = priv->gfargrp[0].regs;
1da177e4 1620 /* Stop the DMA, and wait for it to stop */
f4983704 1621 tempval = gfar_read(&regs->dmactrl);
1da177e4
LT		 1622 if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
1623 != (DMACTRL_GRS | DMACTRL_GTS)) {
511d934f
AV		 1624 int ret;
1625
1da177e4 1626 tempval |= (DMACTRL_GRS | DMACTRL_GTS);
f4983704 1627 gfar_write(&regs->dmactrl, tempval);
1da177e4 1628
511d934f
AV		 1629 do {
1630 ret = spin_event_timeout(((gfar_read(&regs->ievent) &
1631 (IEVENT_GRSC | IEVENT_GTSC)) ==
1632 (IEVENT_GRSC | IEVENT_GTSC)), 1000000, 0);
1633 if (!ret && !(gfar_read(&regs->ievent) & IEVENT_GRSC))
1634 ret = __gfar_is_rx_idle(priv);
1635 } while (!ret);
1da177e4 1636 }
d87eb127 1637}
d87eb127
SW		 1638
1639/* Halt the receive and transmit queues */
1640void gfar_halt(struct net_device *dev)
1641{
1642 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 1643 struct gfar __iomem *regs = priv->gfargrp[0].regs;
d87eb127 1644 u32 tempval;
1da177e4 1645
2a54adc3
SW		 1646 gfar_halt_nodisable(dev);
1647
1da177e4
LT		 1648 /* Disable Rx and Tx */
1649 tempval = gfar_read(&regs->maccfg1);
1650 tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
1651 gfar_write(&regs->maccfg1, tempval);
0bbaf069
KG		 1652}
1653
46ceb60c
SG		 1654static void free_grp_irqs(struct gfar_priv_grp *grp)
1655{
1656 free_irq(grp->interruptError, grp);
1657 free_irq(grp->interruptTransmit, grp);
1658 free_irq(grp->interruptReceive, grp);
1659}
1660
0bbaf069
KG		 1661void stop_gfar(struct net_device *dev)
1662{
1663 struct gfar_private *priv = netdev_priv(dev);
0bbaf069 1664 unsigned long flags;
46ceb60c 1665 int i;
0bbaf069 1666
bb40dcbb
AF		 1667 phy_stop(priv->phydev);
1668
a12f801d 1669
0bbaf069 1670 /* Lock it down */
fba4ed03
SG		 1671 local_irq_save(flags);
1672 lock_tx_qs(priv);
1673 lock_rx_qs(priv);
0bbaf069 1674
0bbaf069 1675 gfar_halt(dev);
1da177e4 1676
fba4ed03
SG		 1677 unlock_rx_qs(priv);
1678 unlock_tx_qs(priv);
1679 local_irq_restore(flags);
1da177e4
LT		 1680
1681 /* Free the IRQs */
b31a1d8b 1682 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
46ceb60c
SG		 1683 for (i = 0; i < priv->num_grps; i++)
1684 free_grp_irqs(&priv->gfargrp[i]);
1da177e4 1685 } else {
46ceb60c
SG		 1686 for (i = 0; i < priv->num_grps; i++)
1687 free_irq(priv->gfargrp[i].interruptTransmit,
1688 &priv->gfargrp[i]);
1da177e4
LT		 1689 }
1690
1691 free_skb_resources(priv);
1da177e4
LT		 1692}
1693
fba4ed03 1694static void free_skb_tx_queue(struct gfar_priv_tx_q *tx_queue)
1da177e4 1695{
1da177e4 1696 struct txbd8 *txbdp;
fba4ed03 1697 struct gfar_private *priv = netdev_priv(tx_queue->dev);
4669bc90 1698 int i, j;
1da177e4 1699
a12f801d 1700 txbdp = tx_queue->tx_bd_base;
1da177e4 1701
a12f801d
SG		 1702 for (i = 0; i < tx_queue->tx_ring_size; i++) {
1703 if (!tx_queue->tx_skbuff[i])
4669bc90 1704 continue;
1da177e4 1705
4826857f 1706 dma_unmap_single(&priv->ofdev->dev, txbdp->bufPtr,
4669bc90
DH		 1707 txbdp->length, DMA_TO_DEVICE);
1708 txbdp->lstatus = 0;
fba4ed03
SG		 1709 for (j = 0; j < skb_shinfo(tx_queue->tx_skbuff[i])->nr_frags;
1710 j++) {
4669bc90 1711 txbdp++;
4826857f 1712 dma_unmap_page(&priv->ofdev->dev, txbdp->bufPtr,
4669bc90 1713 txbdp->length, DMA_TO_DEVICE);
1da177e4 1714 }
ad5da7ab 1715 txbdp++;
a12f801d
SG		 1716 dev_kfree_skb_any(tx_queue->tx_skbuff[i]);
1717 tx_queue->tx_skbuff[i] = NULL;
1da177e4 1718 }
a12f801d 1719 kfree(tx_queue->tx_skbuff);
fba4ed03 1720}
1da177e4 1721
fba4ed03
SG		 1722static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue)
1723{
1724 struct rxbd8 *rxbdp;
1725 struct gfar_private *priv = netdev_priv(rx_queue->dev);
1726 int i;
1da177e4 1727
fba4ed03 1728 rxbdp = rx_queue->rx_bd_base;
1da177e4 1729
a12f801d
SG		 1730 for (i = 0; i < rx_queue->rx_ring_size; i++) {
1731 if (rx_queue->rx_skbuff[i]) {
fba4ed03
SG		 1732 dma_unmap_single(&priv->ofdev->dev,
1733 rxbdp->bufPtr, priv->rx_buffer_size,
e69edd21 1734 DMA_FROM_DEVICE);
a12f801d
SG		 1735 dev_kfree_skb_any(rx_queue->rx_skbuff[i]);
1736 rx_queue->rx_skbuff[i] = NULL;
1da177e4 1737 }
e69edd21
AV		 1738 rxbdp->lstatus = 0;
1739 rxbdp->bufPtr = 0;
1740 rxbdp++;
1da177e4 1741 }
a12f801d 1742 kfree(rx_queue->rx_skbuff);
fba4ed03 1743}
e69edd21 1744
fba4ed03
SG		 1745/* If there are any tx skbs or rx skbs still around, free them.
1746 * Then free tx_skbuff and rx_skbuff */
1747static void free_skb_resources(struct gfar_private *priv)
1748{
1749 struct gfar_priv_tx_q *tx_queue = NULL;
1750 struct gfar_priv_rx_q *rx_queue = NULL;
1751 int i;
1752
1753 /* Go through all the buffer descriptors and free their data buffers */
1754 for (i = 0; i < priv->num_tx_queues; i++) {
1755 tx_queue = priv->tx_queue[i];
7c0d10d3 1756 if(tx_queue->tx_skbuff)
fba4ed03
SG		 1757 free_skb_tx_queue(tx_queue);
1758 }
1759
1760 for (i = 0; i < priv->num_rx_queues; i++) {
1761 rx_queue = priv->rx_queue[i];
7c0d10d3 1762 if(rx_queue->rx_skbuff)
fba4ed03
SG		 1763 free_skb_rx_queue(rx_queue);
1764 }
1765
1766 dma_free_coherent(&priv->ofdev->dev,
1767 sizeof(struct txbd8) * priv->total_tx_ring_size +
1768 sizeof(struct rxbd8) * priv->total_rx_ring_size,
1769 priv->tx_queue[0]->tx_bd_base,
1770 priv->tx_queue[0]->tx_bd_dma_base);
7df9c43f 1771 skb_queue_purge(&priv->rx_recycle);
1da177e4
LT		 1772}
1773
0bbaf069
KG		 1774void gfar_start(struct net_device *dev)
1775{
1776 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 1777 struct gfar __iomem *regs = priv->gfargrp[0].regs;
0bbaf069 1778 u32 tempval;
46ceb60c 1779 int i = 0;
0bbaf069
KG		 1780
1781 /* Enable Rx and Tx in MACCFG1 */
1782 tempval = gfar_read(&regs->maccfg1);
1783 tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
1784 gfar_write(&regs->maccfg1, tempval);
1785
1786 /* Initialize DMACTRL to have WWR and WOP */
f4983704 1787 tempval = gfar_read(&regs->dmactrl);
0bbaf069 1788 tempval |= DMACTRL_INIT_SETTINGS;
f4983704 1789 gfar_write(&regs->dmactrl, tempval);
0bbaf069 1790
0bbaf069 1791 /* Make sure we aren't stopped */
f4983704 1792 tempval = gfar_read(&regs->dmactrl);
0bbaf069 1793 tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
f4983704 1794 gfar_write(&regs->dmactrl, tempval);
0bbaf069 1795
46ceb60c
SG		 1796 for (i = 0; i < priv->num_grps; i++) {
1797 regs = priv->gfargrp[i].regs;
1798 /* Clear THLT/RHLT, so that the DMA starts polling now */
1799 gfar_write(&regs->tstat, priv->gfargrp[i].tstat);
1800 gfar_write(&regs->rstat, priv->gfargrp[i].rstat);
1801 /* Unmask the interrupts we look for */
1802 gfar_write(&regs->imask, IMASK_DEFAULT);
1803 }
12dea57b 1804
1ae5dc34 1805 dev->trans_start = jiffies; /* prevent tx timeout */
0bbaf069
KG		 1806}
1807
46ceb60c 1808void gfar_configure_coalescing(struct gfar_private *priv,
18294ad1 1809 unsigned long tx_mask, unsigned long rx_mask)
1da177e4 1810{
46ceb60c 1811 struct gfar __iomem *regs = priv->gfargrp[0].regs;
18294ad1 1812 u32 __iomem *baddr;
46ceb60c 1813 int i = 0;
1da177e4 1814
46ceb60c
SG		 1815 /* Backward compatible case ---- even if we enable
1816 * multiple queues, there's only single reg to program
1817 */
1818 gfar_write(&regs->txic, 0);
1819 if(likely(priv->tx_queue[0]->txcoalescing))
1820 gfar_write(&regs->txic, priv->tx_queue[0]->txic);
1da177e4 1821
46ceb60c
SG		 1822 gfar_write(&regs->rxic, 0);
1823 if(unlikely(priv->rx_queue[0]->rxcoalescing))
1824 gfar_write(&regs->rxic, priv->rx_queue[0]->rxic);
815b97c6 1825
46ceb60c
SG		 1826 if (priv->mode == MQ_MG_MODE) {
1827 baddr = &regs->txic0;
984b3f57 1828 for_each_set_bit(i, &tx_mask, priv->num_tx_queues) {
46ceb60c
SG		 1829 if (likely(priv->tx_queue[i]->txcoalescing)) {
1830 gfar_write(baddr + i, 0);
1831 gfar_write(baddr + i, priv->tx_queue[i]->txic);
1832 }
1833 }
1834
1835 baddr = &regs->rxic0;
984b3f57 1836 for_each_set_bit(i, &rx_mask, priv->num_rx_queues) {
46ceb60c
SG		 1837 if (likely(priv->rx_queue[i]->rxcoalescing)) {
1838 gfar_write(baddr + i, 0);
1839 gfar_write(baddr + i, priv->rx_queue[i]->rxic);
1840 }
1841 }
1842 }
1843}
1844
1845static int register_grp_irqs(struct gfar_priv_grp *grp)
1846{
1847 struct gfar_private *priv = grp->priv;
1848 struct net_device *dev = priv->ndev;
1849 int err;
1da177e4 1850
1da177e4
LT		 1851 /* If the device has multiple interrupts, register for
1852 * them. Otherwise, only register for the one */
b31a1d8b 1853 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
0bbaf069 1854 /* Install our interrupt handlers for Error,
1da177e4 1855 * Transmit, and Receive */
46ceb60c
SG		 1856 if ((err = request_irq(grp->interruptError, gfar_error, 0,
1857 grp->int_name_er,grp)) < 0) {
0bbaf069 1858 if (netif_msg_intr(priv))
46ceb60c
SG		 1859 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1860 dev->name, grp->interruptError);
1861
2145f1af 1862 goto err_irq_fail;
1da177e4
LT		 1863 }
1864
46ceb60c
SG		 1865 if ((err = request_irq(grp->interruptTransmit, gfar_transmit,
1866 0, grp->int_name_tx, grp)) < 0) {
0bbaf069 1867 if (netif_msg_intr(priv))
46ceb60c
SG		 1868 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1869 dev->name, grp->interruptTransmit);
1da177e4
LT		 1870 goto tx_irq_fail;
1871 }
1872
46ceb60c
SG		 1873 if ((err = request_irq(grp->interruptReceive, gfar_receive, 0,
1874 grp->int_name_rx, grp)) < 0) {
0bbaf069 1875 if (netif_msg_intr(priv))
46ceb60c
SG		 1876 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1877 dev->name, grp->interruptReceive);
1da177e4
LT		 1878 goto rx_irq_fail;
1879 }
1880 } else {
46ceb60c
SG		 1881 if ((err = request_irq(grp->interruptTransmit, gfar_interrupt, 0,
1882 grp->int_name_tx, grp)) < 0) {
0bbaf069 1883 if (netif_msg_intr(priv))
46ceb60c
SG		 1884 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1885 dev->name, grp->interruptTransmit);
1da177e4
LT		 1886 goto err_irq_fail;
1887 }
1888 }
1889
46ceb60c
SG		 1890 return 0;
1891
1892rx_irq_fail:
1893 free_irq(grp->interruptTransmit, grp);
1894tx_irq_fail:
1895 free_irq(grp->interruptError, grp);
1896err_irq_fail:
1897 return err;
1898
1899}
1900
1901/* Bring the controller up and running */
1902int startup_gfar(struct net_device *ndev)
1903{
1904 struct gfar_private *priv = netdev_priv(ndev);
1905 struct gfar __iomem *regs = NULL;
1906 int err, i, j;
1907
1908 for (i = 0; i < priv->num_grps; i++) {
1909 regs= priv->gfargrp[i].regs;
1910 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1911 }
1912
1913 regs= priv->gfargrp[0].regs;
1914 err = gfar_alloc_skb_resources(ndev);
1915 if (err)
1916 return err;
1917
1918 gfar_init_mac(ndev);
1919
1920 for (i = 0; i < priv->num_grps; i++) {
1921 err = register_grp_irqs(&priv->gfargrp[i]);
1922 if (err) {
1923 for (j = 0; j < i; j++)
1924 free_grp_irqs(&priv->gfargrp[j]);
ff76015f 1925 goto irq_fail;
46ceb60c
SG		 1926 }
1927 }
1928
7f7f5316 1929 /* Start the controller */
ccc05c6e 1930 gfar_start(ndev);
1da177e4 1931
826aa4a0
AV		 1932 phy_start(priv->phydev);
1933
46ceb60c
SG		 1934 gfar_configure_coalescing(priv, 0xFF, 0xFF);
1935
1da177e4
LT		 1936 return 0;
1937
46ceb60c 1938irq_fail:
e69edd21 1939 free_skb_resources(priv);
1da177e4
LT		 1940 return err;
1941}
1942
1943/* Called when something needs to use the ethernet device */
1944/* Returns 0 for success. */
1945static int gfar_enet_open(struct net_device *dev)
1946{
94e8cc35 1947 struct gfar_private *priv = netdev_priv(dev);
1da177e4
LT		 1948 int err;
1949
46ceb60c 1950 enable_napi(priv);
bea3348e 1951
0fd56bb5
AF		 1952 skb_queue_head_init(&priv->rx_recycle);
1953
1da177e4
LT		 1954 /* Initialize a bunch of registers */
1955 init_registers(dev);
1956
1957 gfar_set_mac_address(dev);
1958
1959 err = init_phy(dev);
1960
a12f801d 1961 if (err) {
46ceb60c 1962 disable_napi(priv);
1da177e4 1963 return err;
bea3348e 1964 }
1da177e4
LT		 1965
1966 err = startup_gfar(dev);
db0e8e3f 1967 if (err) {
46ceb60c 1968 disable_napi(priv);
db0e8e3f
AV		 1969 return err;
1970 }
1da177e4 1971
fba4ed03 1972 netif_tx_start_all_queues(dev);
1da177e4 1973
2884e5cc
AV		 1974 device_set_wakeup_enable(&dev->dev, priv->wol_en);
1975
1da177e4
LT		 1976 return err;
1977}
1978
54dc79fe 1979static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb)
0bbaf069 1980{
54dc79fe 1981 struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN);
6c31d55f
KG		 1982
1983 memset(fcb, 0, GMAC_FCB_LEN);
0bbaf069 1984
0bbaf069
KG		 1985 return fcb;
1986}
1987
1988static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb)
1989{
7f7f5316 1990 u8 flags = 0;
0bbaf069
KG		 1991
1992 /* If we're here, it's a IP packet with a TCP or UDP
1993 * payload. We set it to checksum, using a pseudo-header
1994 * we provide
1995 */
7f7f5316 1996 flags = TXFCB_DEFAULT;
0bbaf069 1997
7f7f5316
AF		 1998 /* Tell the controller what the protocol is */
1999 /* And provide the already calculated phcs */
eddc9ec5 2000 if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
7f7f5316 2001 flags |= TXFCB_UDP;
4bedb452 2002 fcb->phcs = udp_hdr(skb)->check;
7f7f5316 2003 } else
8da32de5 2004 fcb->phcs = tcp_hdr(skb)->check;
0bbaf069
KG		 2005
2006 /* l3os is the distance between the start of the
2007 * frame (skb->data) and the start of the IP hdr.
2008 * l4os is the distance between the start of the
2009 * l3 hdr and the l4 hdr */
bbe735e4 2010 fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN);
cfe1fc77 2011 fcb->l4os = skb_network_header_len(skb);
0bbaf069 2012
7f7f5316 2013 fcb->flags = flags;
0bbaf069
KG		 2014}
2015
7f7f5316 2016void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb)
0bbaf069 2017{
7f7f5316 2018 fcb->flags |= TXFCB_VLN;
0bbaf069
KG		 2019 fcb->vlctl = vlan_tx_tag_get(skb);
2020}
2021
4669bc90
DH		 2022static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride,
2023 struct txbd8 *base, int ring_size)
2024{
2025 struct txbd8 *new_bd = bdp + stride;
2026
2027 return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd;
2028}
2029
2030static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base,
2031 int ring_size)
2032{
2033 return skip_txbd(bdp, 1, base, ring_size);
2034}
2035
1da177e4
LT		 2036/* This is called by the kernel when a frame is ready for transmission. */
2037/* It is pointed to by the dev->hard_start_xmit function pointer */
2038static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
2039{
2040 struct gfar_private *priv = netdev_priv(dev);
a12f801d 2041 struct gfar_priv_tx_q *tx_queue = NULL;
fba4ed03 2042 struct netdev_queue *txq;
f4983704 2043 struct gfar __iomem *regs = NULL;
0bbaf069 2044 struct txfcb *fcb = NULL;
f0ee7acf 2045 struct txbd8 *txbdp, *txbdp_start, *base, *txbdp_tstamp = NULL;
5a5efed4 2046 u32 lstatus;
f0ee7acf 2047 int i, rq = 0, do_tstamp = 0;
4669bc90 2048 u32 bufaddr;
fef6108d 2049 unsigned long flags;
f0ee7acf 2050 unsigned int nr_frags, nr_txbds, length;
fba4ed03 2051
deb90eac
AV		 2052 /*
2053 * TOE=1 frames larger than 2500 bytes may see excess delays
2054 * before start of transmission.
2055 */
2056 if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_76) &&
2057 skb->ip_summed == CHECKSUM_PARTIAL &&
2058 skb->len > 2500)) {
2059 int ret;
2060
2061 ret = skb_checksum_help(skb);
2062 if (ret)
2063 return ret;
2064 }
2065
fba4ed03
SG		 2066 rq = skb->queue_mapping;
2067 tx_queue = priv->tx_queue[rq];
2068 txq = netdev_get_tx_queue(dev, rq);
a12f801d 2069 base = tx_queue->tx_bd_base;
46ceb60c 2070 regs = tx_queue->grp->regs;
f0ee7acf
MR		 2071
2072 /* check if time stamp should be generated */
2244d07b
OH		 2073 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
2074 priv->hwts_tx_en))
f0ee7acf 2075 do_tstamp = 1;
4669bc90 2076
5b28beaf
LY		 2077 /* make space for additional header when fcb is needed */
2078 if (((skb->ip_summed == CHECKSUM_PARTIAL) ||
eab6d18d 2079 vlan_tx_tag_present(skb) ||
f0ee7acf 2080 unlikely(do_tstamp)) &&
5b28beaf 2081 (skb_headroom(skb) < GMAC_FCB_LEN)) {
54dc79fe
SH		 2082 struct sk_buff *skb_new;
2083
2084 skb_new = skb_realloc_headroom(skb, GMAC_FCB_LEN);
2085 if (!skb_new) {
2086 dev->stats.tx_errors++;
bd14ba84 2087 kfree_skb(skb);
54dc79fe
SH		 2088 return NETDEV_TX_OK;
2089 }
2090 kfree_skb(skb);
2091 skb = skb_new;
2092 }
2093
4669bc90
DH		 2094 /* total number of fragments in the SKB */
2095 nr_frags = skb_shinfo(skb)->nr_frags;
2096
f0ee7acf
MR		 2097 /* calculate the required number of TxBDs for this skb */
2098 if (unlikely(do_tstamp))
2099 nr_txbds = nr_frags + 2;
2100 else
2101 nr_txbds = nr_frags + 1;
2102
4669bc90 2103 /* check if there is space to queue this packet */
f0ee7acf 2104 if (nr_txbds > tx_queue->num_txbdfree) {
4669bc90 2105 /* no space, stop the queue */
fba4ed03 2106 netif_tx_stop_queue(txq);
4669bc90 2107 dev->stats.tx_fifo_errors++;
4669bc90
DH		 2108 return NETDEV_TX_BUSY;
2109 }
1da177e4
LT		 2110
2111 /* Update transmit stats */
1ac9ad13
ED		 2112 tx_queue->stats.tx_bytes += skb->len;
2113 tx_queue->stats.tx_packets++;
1da177e4 2114
a12f801d 2115 txbdp = txbdp_start = tx_queue->cur_tx;
f0ee7acf
MR		 2116 lstatus = txbdp->lstatus;
2117
2118 /* Time stamp insertion requires one additional TxBD */
2119 if (unlikely(do_tstamp))
2120 txbdp_tstamp = txbdp = next_txbd(txbdp, base,
2121 tx_queue->tx_ring_size);
1da177e4 2122
4669bc90 2123 if (nr_frags == 0) {
f0ee7acf
MR		 2124 if (unlikely(do_tstamp))
2125 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_LAST |
2126 TXBD_INTERRUPT);
2127 else
2128 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
4669bc90
DH		 2129 } else {
2130 /* Place the fragment addresses and lengths into the TxBDs */
2131 for (i = 0; i < nr_frags; i++) {
2132 /* Point at the next BD, wrapping as needed */
a12f801d 2133 txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size);
4669bc90
DH		 2134
2135 length = skb_shinfo(skb)->frags[i].size;
2136
2137 lstatus = txbdp->lstatus | length |
2138 BD_LFLAG(TXBD_READY);
2139
2140 /* Handle the last BD specially */
2141 if (i == nr_frags - 1)
2142 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
1da177e4 2143
4826857f 2144 bufaddr = dma_map_page(&priv->ofdev->dev,
4669bc90
DH		 2145 skb_shinfo(skb)->frags[i].page,
2146 skb_shinfo(skb)->frags[i].page_offset,
2147 length,
2148 DMA_TO_DEVICE);
2149
2150 /* set the TxBD length and buffer pointer */
2151 txbdp->bufPtr = bufaddr;
2152 txbdp->lstatus = lstatus;
2153 }
2154
2155 lstatus = txbdp_start->lstatus;
2156 }
1da177e4 2157
0bbaf069 2158 /* Set up checksumming */
12dea57b 2159 if (CHECKSUM_PARTIAL == skb->ip_summed) {
54dc79fe 2160 fcb = gfar_add_fcb(skb);
4363c2fd
AD		 2161 /* as specified by errata */
2162 if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_12)
2163 && ((unsigned long)fcb % 0x20) > 0x18)) {
2164 __skb_pull(skb, GMAC_FCB_LEN);
2165 skb_checksum_help(skb);
2166 } else {
2167 lstatus |= BD_LFLAG(TXBD_TOE);
2168 gfar_tx_checksum(skb, fcb);
2169 }
0bbaf069
KG		 2170 }
2171
eab6d18d 2172 if (vlan_tx_tag_present(skb)) {
54dc79fe
SH		 2173 if (unlikely(NULL == fcb)) {
2174 fcb = gfar_add_fcb(skb);
5a5efed4 2175 lstatus |= BD_LFLAG(TXBD_TOE);
7f7f5316 2176 }
54dc79fe
SH		 2177
2178 gfar_tx_vlan(skb, fcb);
0bbaf069
KG		 2179 }
2180
f0ee7acf
MR		 2181 /* Setup tx hardware time stamping if requested */
2182 if (unlikely(do_tstamp)) {
2244d07b 2183 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
f0ee7acf
MR		 2184 if (fcb == NULL)
2185 fcb = gfar_add_fcb(skb);
2186 fcb->ptp = 1;
2187 lstatus |= BD_LFLAG(TXBD_TOE);
2188 }
2189
4826857f 2190 txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data,
4669bc90 2191 skb_headlen(skb), DMA_TO_DEVICE);
1da177e4 2192
f0ee7acf
MR		 2193 /*
2194 * If time stamping is requested one additional TxBD must be set up. The
2195 * first TxBD points to the FCB and must have a data length of
2196 * GMAC_FCB_LEN. The second TxBD points to the actual frame data with
2197 * the full frame length.
2198 */
2199 if (unlikely(do_tstamp)) {
2200 txbdp_tstamp->bufPtr = txbdp_start->bufPtr + GMAC_FCB_LEN;
2201 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_READY) |
2202 (skb_headlen(skb) - GMAC_FCB_LEN);
2203 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | GMAC_FCB_LEN;
2204 } else {
2205 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
2206 }
1da177e4 2207
a3bc1f11
AV		 2208 /*
2209 * We can work in parallel with gfar_clean_tx_ring(), except
2210 * when modifying num_txbdfree. Note that we didn't grab the lock
2211 * when we were reading the num_txbdfree and checking for available
2212 * space, that's because outside of this function it can only grow,
2213 * and once we've got needed space, it cannot suddenly disappear.
2214 *
2215 * The lock also protects us from gfar_error(), which can modify
2216 * regs->tstat and thus retrigger the transfers, which is why we
2217 * also must grab the lock before setting ready bit for the first
2218 * to be transmitted BD.
2219 */
2220 spin_lock_irqsave(&tx_queue->txlock, flags);
2221
4669bc90
DH		 2222 /*
2223 * The powerpc-specific eieio() is used, as wmb() has too strong
3b6330ce
SW		 2224 * semantics (it requires synchronization between cacheable and
2225 * uncacheable mappings, which eieio doesn't provide and which we
2226 * don't need), thus requiring a more expensive sync instruction. At
2227 * some point, the set of architecture-independent barrier functions
2228 * should be expanded to include weaker barriers.
2229 */
3b6330ce 2230 eieio();
7f7f5316 2231
4669bc90
DH		 2232 txbdp_start->lstatus = lstatus;
2233
0eddba52
AV		 2234 eieio(); /* force lstatus write before tx_skbuff */
2235
2236 tx_queue->tx_skbuff[tx_queue->skb_curtx] = skb;
2237
4669bc90
DH		 2238 /* Update the current skb pointer to the next entry we will use
2239 * (wrapping if necessary) */
a12f801d
SG		 2240 tx_queue->skb_curtx = (tx_queue->skb_curtx + 1) &
2241 TX_RING_MOD_MASK(tx_queue->tx_ring_size);
4669bc90 2242
a12f801d 2243 tx_queue->cur_tx = next_txbd(txbdp, base, tx_queue->tx_ring_size);
4669bc90
DH		 2244
2245 /* reduce TxBD free count */
f0ee7acf 2246 tx_queue->num_txbdfree -= (nr_txbds);
1da177e4
LT		 2247
2248 /* If the next BD still needs to be cleaned up, then the bds
2249 are full. We need to tell the kernel to stop sending us stuff. */
a12f801d 2250 if (!tx_queue->num_txbdfree) {
fba4ed03 2251 netif_tx_stop_queue(txq);
1da177e4 2252
09f75cd7 2253 dev->stats.tx_fifo_errors++;
1da177e4
LT		 2254 }
2255
1da177e4 2256 /* Tell the DMA to go go go */
fba4ed03 2257 gfar_write(&regs->tstat, TSTAT_CLEAR_THALT >> tx_queue->qindex);
1da177e4
LT		 2258
2259 /* Unlock priv */
a12f801d 2260 spin_unlock_irqrestore(&tx_queue->txlock, flags);
1da177e4 2261
54dc79fe 2262 return NETDEV_TX_OK;
1da177e4
LT		 2263}
2264
2265/* Stops the kernel queue, and halts the controller */
2266static int gfar_close(struct net_device *dev)
2267{
2268 struct gfar_private *priv = netdev_priv(dev);
bea3348e 2269
46ceb60c 2270 disable_napi(priv);
bea3348e 2271
ab939905 2272 cancel_work_sync(&priv->reset_task);
1da177e4
LT		 2273 stop_gfar(dev);
2274
bb40dcbb
AF		 2275 /* Disconnect from the PHY */
2276 phy_disconnect(priv->phydev);
2277 priv->phydev = NULL;
1da177e4 2278
fba4ed03 2279 netif_tx_stop_all_queues(dev);
1da177e4
LT		 2280
2281 return 0;
2282}
2283
1da177e4 2284/* Changes the mac address if the controller is not running. */
f162b9d5 2285static int gfar_set_mac_address(struct net_device *dev)
1da177e4 2286{
7f7f5316 2287 gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
1da177e4
LT		 2288
2289 return 0;
2290}
2291
f3dc1586
SP		 2292/* Check if rx parser should be activated */
2293void gfar_check_rx_parser_mode(struct gfar_private *priv)
2294{
2295 struct gfar __iomem *regs;
2296 u32 tempval;
2297
2298 regs = priv->gfargrp[0].regs;
2299
2300 tempval = gfar_read(&regs->rctrl);
2301 /* If parse is no longer required, then disable parser */
2302 if (tempval & RCTRL_REQ_PARSER)
2303 tempval |= RCTRL_PRSDEP_INIT;
2304 else
2305 tempval &= ~RCTRL_PRSDEP_INIT;
2306 gfar_write(&regs->rctrl, tempval);
2307}
2308
1da177e4 2309
0bbaf069
KG		 2310/* Enables and disables VLAN insertion/extraction */
2311static void gfar_vlan_rx_register(struct net_device *dev,
2312 struct vlan_group *grp)
2313{
2314 struct gfar_private *priv = netdev_priv(dev);
f4983704 2315 struct gfar __iomem *regs = NULL;
0bbaf069
KG		 2316 unsigned long flags;
2317 u32 tempval;
2318
46ceb60c 2319 regs = priv->gfargrp[0].regs;
fba4ed03
SG		 2320 local_irq_save(flags);
2321 lock_rx_qs(priv);
0bbaf069 2322
cd1f55a5 2323 priv->vlgrp = grp;
0bbaf069
KG		 2324
2325 if (grp) {
2326 /* Enable VLAN tag insertion */
f4983704 2327 tempval = gfar_read(&regs->tctrl);
0bbaf069
KG		 2328 tempval |= TCTRL_VLINS;
2329
f4983704 2330 gfar_write(&regs->tctrl, tempval);
6aa20a22 2331
0bbaf069 2332 /* Enable VLAN tag extraction */
f4983704 2333 tempval = gfar_read(&regs->rctrl);
77ecaf2d 2334 tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT);
f4983704 2335 gfar_write(&regs->rctrl, tempval);
0bbaf069
KG		 2336 } else {
2337 /* Disable VLAN tag insertion */
f4983704 2338 tempval = gfar_read(&regs->tctrl);
0bbaf069 2339 tempval &= ~TCTRL_VLINS;
f4983704 2340 gfar_write(&regs->tctrl, tempval);
0bbaf069
KG		 2341
2342 /* Disable VLAN tag extraction */
f4983704 2343 tempval = gfar_read(&regs->rctrl);
0bbaf069 2344 tempval &= ~RCTRL_VLEX;
f4983704 2345 gfar_write(&regs->rctrl, tempval);
f3dc1586
SP		 2346
2347 gfar_check_rx_parser_mode(priv);
0bbaf069
KG		 2348 }
2349
77ecaf2d
DH		 2350 gfar_change_mtu(dev, dev->mtu);
2351
fba4ed03
SG		 2352 unlock_rx_qs(priv);
2353 local_irq_restore(flags);
0bbaf069
KG		 2354}
2355
1da177e4
LT		 2356static int gfar_change_mtu(struct net_device *dev, int new_mtu)
2357{
2358 int tempsize, tempval;
2359 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 2360 struct gfar __iomem *regs = priv->gfargrp[0].regs;
1da177e4 2361 int oldsize = priv->rx_buffer_size;
0bbaf069
KG		 2362 int frame_size = new_mtu + ETH_HLEN;
2363
77ecaf2d 2364 if (priv->vlgrp)
faa89577 2365 frame_size += VLAN_HLEN;
0bbaf069 2366
1da177e4 2367 if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
0bbaf069
KG		 2368 if (netif_msg_drv(priv))
2369 printk(KERN_ERR "%s: Invalid MTU setting\n",
2370 dev->name);
1da177e4
LT		 2371 return -EINVAL;
2372 }
2373
77ecaf2d
DH		 2374 if (gfar_uses_fcb(priv))
2375 frame_size += GMAC_FCB_LEN;
2376
2377 frame_size += priv->padding;
2378
1da177e4
LT		 2379 tempsize =
2380 (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
2381 INCREMENTAL_BUFFER_SIZE;
2382
2383 /* Only stop and start the controller if it isn't already
7f7f5316 2384 * stopped, and we changed something */
1da177e4
LT		 2385 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2386 stop_gfar(dev);
2387
2388 priv->rx_buffer_size = tempsize;
2389
2390 dev->mtu = new_mtu;
2391
f4983704
SG		 2392 gfar_write(&regs->mrblr, priv->rx_buffer_size);
2393 gfar_write(&regs->maxfrm, priv->rx_buffer_size);
1da177e4
LT		 2394
2395 /* If the mtu is larger than the max size for standard
2396 * ethernet frames (ie, a jumbo frame), then set maccfg2
2397 * to allow huge frames, and to check the length */
f4983704 2398 tempval = gfar_read(&regs->maccfg2);
1da177e4 2399
7d350977
AV		 2400 if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE ||
2401 gfar_has_errata(priv, GFAR_ERRATA_74))
1da177e4
LT		 2402 tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2403 else
2404 tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2405
f4983704 2406 gfar_write(&regs->maccfg2, tempval);
1da177e4
LT		 2407
2408 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2409 startup_gfar(dev);
2410
2411 return 0;
2412}
2413
ab939905 2414/* gfar_reset_task gets scheduled when a packet has not been
1da177e4
LT		 2415 * transmitted after a set amount of time.
2416 * For now, assume that clearing out all the structures, and
ab939905
SS		 2417 * starting over will fix the problem.
2418 */
2419static void gfar_reset_task(struct work_struct *work)
1da177e4 2420{
ab939905
SS		 2421 struct gfar_private *priv = container_of(work, struct gfar_private,
2422 reset_task);
4826857f 2423 struct net_device *dev = priv->ndev;
1da177e4
LT		 2424
2425 if (dev->flags & IFF_UP) {
fba4ed03 2426 netif_tx_stop_all_queues(dev);
1da177e4
LT		 2427 stop_gfar(dev);
2428 startup_gfar(dev);
fba4ed03 2429 netif_tx_start_all_queues(dev);
1da177e4
LT		 2430 }
2431
263ba320 2432 netif_tx_schedule_all(dev);
1da177e4
LT		 2433}
2434
ab939905
SS		 2435static void gfar_timeout(struct net_device *dev)
2436{
2437 struct gfar_private *priv = netdev_priv(dev);
2438
2439 dev->stats.tx_errors++;
2440 schedule_work(&priv->reset_task);
2441}
2442
acbc0f03
EL		 2443static void gfar_align_skb(struct sk_buff *skb)
2444{
2445 /* We need the data buffer to be aligned properly. We will reserve
2446 * as many bytes as needed to align the data properly
2447 */
2448 skb_reserve(skb, RXBUF_ALIGNMENT -
2449 (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)));
2450}
2451
1da177e4 2452/* Interrupt Handler for Transmit complete */
a12f801d 2453static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
1da177e4 2454{
a12f801d 2455 struct net_device *dev = tx_queue->dev;
d080cd63 2456 struct gfar_private *priv = netdev_priv(dev);
a12f801d 2457 struct gfar_priv_rx_q *rx_queue = NULL;
f0ee7acf 2458 struct txbd8 *bdp, *next = NULL;
4669bc90 2459 struct txbd8 *lbdp = NULL;
a12f801d 2460 struct txbd8 *base = tx_queue->tx_bd_base;
4669bc90
DH		 2461 struct sk_buff *skb;
2462 int skb_dirtytx;
a12f801d 2463 int tx_ring_size = tx_queue->tx_ring_size;
f0ee7acf 2464 int frags = 0, nr_txbds = 0;
4669bc90 2465 int i;
d080cd63 2466 int howmany = 0;
4669bc90 2467 u32 lstatus;
f0ee7acf 2468 size_t buflen;
1da177e4 2469
fba4ed03 2470 rx_queue = priv->rx_queue[tx_queue->qindex];
a12f801d
SG		 2471 bdp = tx_queue->dirty_tx;
2472 skb_dirtytx = tx_queue->skb_dirtytx;
1da177e4 2473
a12f801d 2474 while ((skb = tx_queue->tx_skbuff[skb_dirtytx])) {
a3bc1f11
AV		 2475 unsigned long flags;
2476
4669bc90 2477 frags = skb_shinfo(skb)->nr_frags;
f0ee7acf
MR		 2478
2479 /*
2480 * When time stamping, one additional TxBD must be freed.
2481 * Also, we need to dma_unmap_single() the TxPAL.
2482 */
2244d07b 2483 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))
f0ee7acf
MR		 2484 nr_txbds = frags + 2;
2485 else
2486 nr_txbds = frags + 1;
2487
2488 lbdp = skip_txbd(bdp, nr_txbds - 1, base, tx_ring_size);
1da177e4 2489
4669bc90 2490 lstatus = lbdp->lstatus;
1da177e4 2491
4669bc90
DH		 2492 /* Only clean completed frames */
2493 if ((lstatus & BD_LFLAG(TXBD_READY)) &&
2494 (lstatus & BD_LENGTH_MASK))
2495 break;
2496
2244d07b 2497 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
f0ee7acf
MR		 2498 next = next_txbd(bdp, base, tx_ring_size);
2499 buflen = next->length + GMAC_FCB_LEN;
2500 } else
2501 buflen = bdp->length;
2502
2503 dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
2504 buflen, DMA_TO_DEVICE);
2505
2244d07b 2506 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
f0ee7acf
MR		 2507 struct skb_shared_hwtstamps shhwtstamps;
2508 u64 *ns = (u64*) (((u32)skb->data + 0x10) & ~0x7);
2509 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
2510 shhwtstamps.hwtstamp = ns_to_ktime(*ns);
2511 skb_tstamp_tx(skb, &shhwtstamps);
2512 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2513 bdp = next;
2514 }
81183059 2515
4669bc90
DH		 2516 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2517 bdp = next_txbd(bdp, base, tx_ring_size);
d080cd63 2518
4669bc90 2519 for (i = 0; i < frags; i++) {
4826857f 2520 dma_unmap_page(&priv->ofdev->dev,
4669bc90
DH		 2521 bdp->bufPtr,
2522 bdp->length,
2523 DMA_TO_DEVICE);
2524 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2525 bdp = next_txbd(bdp, base, tx_ring_size);
2526 }
1da177e4 2527
0fd56bb5
AF		 2528 /*
2529 * If there's room in the queue (limit it to rx_buffer_size)
2530 * we add this skb back into the pool, if it's the right size
2531 */
a12f801d 2532 if (skb_queue_len(&priv->rx_recycle) < rx_queue->rx_ring_size &&
0fd56bb5 2533 skb_recycle_check(skb, priv->rx_buffer_size +
acbc0f03
EL		 2534 RXBUF_ALIGNMENT)) {
2535 gfar_align_skb(skb);
cd0ea241 2536 skb_queue_head(&priv->rx_recycle, skb);
acbc0f03 2537 } else
0fd56bb5
AF		 2538 dev_kfree_skb_any(skb);
2539
a12f801d 2540 tx_queue->tx_skbuff[skb_dirtytx] = NULL;
d080cd63 2541
4669bc90
DH		 2542 skb_dirtytx = (skb_dirtytx + 1) &
2543 TX_RING_MOD_MASK(tx_ring_size);
2544
2545 howmany++;
a3bc1f11 2546 spin_lock_irqsave(&tx_queue->txlock, flags);
f0ee7acf 2547 tx_queue->num_txbdfree += nr_txbds;
a3bc1f11 2548 spin_unlock_irqrestore(&tx_queue->txlock, flags);
4669bc90 2549 }
1da177e4 2550
4669bc90 2551 /* If we freed a buffer, we can restart transmission, if necessary */
fba4ed03
SG		 2552 if (__netif_subqueue_stopped(dev, tx_queue->qindex) && tx_queue->num_txbdfree)
2553 netif_wake_subqueue(dev, tx_queue->qindex);
1da177e4 2554
4669bc90 2555 /* Update dirty indicators */
a12f801d
SG		 2556 tx_queue->skb_dirtytx = skb_dirtytx;
2557 tx_queue->dirty_tx = bdp;
1da177e4 2558
d080cd63
DH		 2559 return howmany;
2560}
2561
f4983704 2562static void gfar_schedule_cleanup(struct gfar_priv_grp *gfargrp)
d080cd63 2563{
a6d0b91a
AV		 2564 unsigned long flags;
2565
fba4ed03
SG		 2566 spin_lock_irqsave(&gfargrp->grplock, flags);
2567 if (napi_schedule_prep(&gfargrp->napi)) {
f4983704 2568 gfar_write(&gfargrp->regs->imask, IMASK_RTX_DISABLED);
fba4ed03 2569 __napi_schedule(&gfargrp->napi);
8707bdd4
JP		 2570 } else {
2571 /*
2572 * Clear IEVENT, so interrupts aren't called again
2573 * because of the packets that have already arrived.
2574 */
f4983704 2575 gfar_write(&gfargrp->regs->ievent, IEVENT_RTX_MASK);
2f448911 2576 }
fba4ed03 2577 spin_unlock_irqrestore(&gfargrp->grplock, flags);
a6d0b91a 2578
8c7396ae 2579}
1da177e4 2580
8c7396ae 2581/* Interrupt Handler for Transmit complete */
f4983704 2582static irqreturn_t gfar_transmit(int irq, void *grp_id)
8c7396ae 2583{
f4983704 2584 gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
1da177e4
LT		 2585 return IRQ_HANDLED;
2586}
2587
a12f801d 2588static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
815b97c6
AF		 2589 struct sk_buff *skb)
2590{
a12f801d 2591 struct net_device *dev = rx_queue->dev;
815b97c6 2592 struct gfar_private *priv = netdev_priv(dev);
8a102fe0 2593 dma_addr_t buf;
815b97c6 2594
8a102fe0
AV		 2595 buf = dma_map_single(&priv->ofdev->dev, skb->data,
2596 priv->rx_buffer_size, DMA_FROM_DEVICE);
a12f801d 2597 gfar_init_rxbdp(rx_queue, bdp, buf);
815b97c6
AF		 2598}
2599
acbc0f03 2600static struct sk_buff * gfar_alloc_skb(struct net_device *dev)
1da177e4
LT		 2601{
2602 struct gfar_private *priv = netdev_priv(dev);
2603 struct sk_buff *skb = NULL;
1da177e4 2604
acbc0f03 2605 skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
815b97c6 2606 if (!skb)
1da177e4
LT		 2607 return NULL;
2608
acbc0f03 2609 gfar_align_skb(skb);
7f7f5316 2610
acbc0f03
EL		 2611 return skb;
2612}
2613
2614struct sk_buff * gfar_new_skb(struct net_device *dev)
2615{
2616 struct gfar_private *priv = netdev_priv(dev);
2617 struct sk_buff *skb = NULL;
2618
cd0ea241 2619 skb = skb_dequeue(&priv->rx_recycle);
acbc0f03
EL		 2620 if (!skb)
2621 skb = gfar_alloc_skb(dev);
1da177e4 2622
1da177e4
LT		 2623 return skb;
2624}
2625
298e1a9e 2626static inline void count_errors(unsigned short status, struct net_device *dev)
1da177e4 2627{
298e1a9e 2628 struct gfar_private *priv = netdev_priv(dev);
09f75cd7 2629 struct net_device_stats *stats = &dev->stats;
1da177e4
LT		 2630 struct gfar_extra_stats *estats = &priv->extra_stats;
2631
2632 /* If the packet was truncated, none of the other errors
2633 * matter */
2634 if (status & RXBD_TRUNCATED) {
2635 stats->rx_length_errors++;
2636
2637 estats->rx_trunc++;
2638
2639 return;
2640 }
2641 /* Count the errors, if there were any */
2642 if (status & (RXBD_LARGE | RXBD_SHORT)) {
2643 stats->rx_length_errors++;
2644
2645 if (status & RXBD_LARGE)
2646 estats->rx_large++;
2647 else
2648 estats->rx_short++;
2649 }
2650 if (status & RXBD_NONOCTET) {
2651 stats->rx_frame_errors++;
2652 estats->rx_nonoctet++;
2653 }
2654 if (status & RXBD_CRCERR) {
2655 estats->rx_crcerr++;
2656 stats->rx_crc_errors++;
2657 }
2658 if (status & RXBD_OVERRUN) {
2659 estats->rx_overrun++;
2660 stats->rx_crc_errors++;
2661 }
2662}
2663
f4983704 2664irqreturn_t gfar_receive(int irq, void *grp_id)
1da177e4 2665{
f4983704 2666 gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
1da177e4
LT		 2667 return IRQ_HANDLED;
2668}
2669
0bbaf069
KG		 2670static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb)
2671{
2672 /* If valid headers were found, and valid sums
2673 * were verified, then we tell the kernel that no
2674 * checksumming is necessary. Otherwise, it is */
7f7f5316 2675 if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU))
0bbaf069
KG		 2676 skb->ip_summed = CHECKSUM_UNNECESSARY;
2677 else
bc8acf2c 2678 skb_checksum_none_assert(skb);
0bbaf069
KG		 2679}
2680
2681
1da177e4
LT		 2682/* gfar_process_frame() -- handle one incoming packet if skb
2683 * isn't NULL. */
2684static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
2c2db48a 2685 int amount_pull)
1da177e4
LT		 2686{
2687 struct gfar_private *priv = netdev_priv(dev);
0bbaf069 2688 struct rxfcb *fcb = NULL;
1da177e4 2689
2c2db48a 2690 int ret;
1da177e4 2691
2c2db48a
DH		 2692 /* fcb is at the beginning if exists */
2693 fcb = (struct rxfcb *)skb->data;
0bbaf069 2694
2c2db48a
DH		 2695 /* Remove the FCB from the skb */
2696 /* Remove the padded bytes, if there are any */
f74dac08
SG		 2697 if (amount_pull) {
2698 skb_record_rx_queue(skb, fcb->rq);
2c2db48a 2699 skb_pull(skb, amount_pull);
f74dac08 2700 }
0bbaf069 2701
cc772ab7
MR		 2702 /* Get receive timestamp from the skb */
2703 if (priv->hwts_rx_en) {
2704 struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb);
2705 u64 *ns = (u64 *) skb->data;
2706 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
2707 shhwtstamps->hwtstamp = ns_to_ktime(*ns);
2708 }
2709
2710 if (priv->padding)
2711 skb_pull(skb, priv->padding);
2712
8b3afe95 2713 if (dev->features & NETIF_F_RXCSUM)
2c2db48a 2714 gfar_rx_checksum(skb, fcb);
0bbaf069 2715
2c2db48a
DH		 2716 /* Tell the skb what kind of packet this is */
2717 skb->protocol = eth_type_trans(skb, dev);
1da177e4 2718
2c2db48a
DH		 2719 /* Send the packet up the stack */
2720 if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN)))
2721 ret = vlan_hwaccel_receive_skb(skb, priv->vlgrp, fcb->vlctl);
2722 else
2723 ret = netif_receive_skb(skb);
0bbaf069 2724
2c2db48a
DH		 2725 if (NET_RX_DROP == ret)
2726 priv->extra_stats.kernel_dropped++;
1da177e4
LT		 2727
2728 return 0;
2729}
2730
2731/* gfar_clean_rx_ring() -- Processes each frame in the rx ring
0bbaf069 2732 * until the budget/quota has been reached. Returns the number
1da177e4
LT		 2733 * of frames handled
2734 */
a12f801d 2735int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit)
1da177e4 2736{
a12f801d 2737 struct net_device *dev = rx_queue->dev;
31de198b 2738 struct rxbd8 *bdp, *base;
1da177e4 2739 struct sk_buff *skb;
2c2db48a
DH		 2740 int pkt_len;
2741 int amount_pull;
1da177e4
LT		 2742 int howmany = 0;
2743 struct gfar_private *priv = netdev_priv(dev);
2744
2745 /* Get the first full descriptor */
a12f801d
SG		 2746 bdp = rx_queue->cur_rx;
2747 base = rx_queue->rx_bd_base;
1da177e4 2748
cc772ab7 2749 amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0);
2c2db48a 2750
1da177e4 2751 while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) {
815b97c6 2752 struct sk_buff *newskb;
3b6330ce 2753 rmb();
815b97c6
AF		 2754
2755 /* Add another skb for the future */
2756 newskb = gfar_new_skb(dev);
2757
a12f801d 2758 skb = rx_queue->rx_skbuff[rx_queue->skb_currx];
1da177e4 2759
4826857f 2760 dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
81183059
AF		 2761 priv->rx_buffer_size, DMA_FROM_DEVICE);
2762
63b88b90
AV		 2763 if (unlikely(!(bdp->status & RXBD_ERR) &&
2764 bdp->length > priv->rx_buffer_size))
2765 bdp->status = RXBD_LARGE;
2766
815b97c6
AF		 2767 /* We drop the frame if we failed to allocate a new buffer */
2768 if (unlikely(!newskb || !(bdp->status & RXBD_LAST) ||
2769 bdp->status & RXBD_ERR)) {
2770 count_errors(bdp->status, dev);
2771
2772 if (unlikely(!newskb))
2773 newskb = skb;
acbc0f03 2774 else if (skb)
cd0ea241 2775 skb_queue_head(&priv->rx_recycle, skb);
815b97c6 2776 } else {
1da177e4 2777 /* Increment the number of packets */
a7f38041 2778 rx_queue->stats.rx_packets++;
1da177e4
LT		 2779 howmany++;
2780
2c2db48a
DH		 2781 if (likely(skb)) {
2782 pkt_len = bdp->length - ETH_FCS_LEN;
2783 /* Remove the FCS from the packet length */
2784 skb_put(skb, pkt_len);
a7f38041 2785 rx_queue->stats.rx_bytes += pkt_len;
f74dac08 2786 skb_record_rx_queue(skb, rx_queue->qindex);
2c2db48a
DH		 2787 gfar_process_frame(dev, skb, amount_pull);
2788
2789 } else {
2790 if (netif_msg_rx_err(priv))
2791 printk(KERN_WARNING
2792 "%s: Missing skb!\n", dev->name);
a7f38041 2793 rx_queue->stats.rx_dropped++;
2c2db48a
DH		 2794 priv->extra_stats.rx_skbmissing++;
2795 }
1da177e4 2796
1da177e4
LT		 2797 }
2798
a12f801d 2799 rx_queue->rx_skbuff[rx_queue->skb_currx] = newskb;
1da177e4 2800
815b97c6 2801 /* Setup the new bdp */
a12f801d 2802 gfar_new_rxbdp(rx_queue, bdp, newskb);
1da177e4
LT		 2803
2804 /* Update to the next pointer */
a12f801d 2805 bdp = next_bd(bdp, base, rx_queue->rx_ring_size);
1da177e4
LT		 2806
2807 /* update to point at the next skb */
a12f801d
SG		 2808 rx_queue->skb_currx =
2809 (rx_queue->skb_currx + 1) &
2810 RX_RING_MOD_MASK(rx_queue->rx_ring_size);
1da177e4
LT		 2811 }
2812
2813 /* Update the current rxbd pointer to be the next one */
a12f801d 2814 rx_queue->cur_rx = bdp;
1da177e4 2815
1da177e4
LT		 2816 return howmany;
2817}
2818
bea3348e 2819static int gfar_poll(struct napi_struct *napi, int budget)
1da177e4 2820{
fba4ed03
SG		 2821 struct gfar_priv_grp *gfargrp = container_of(napi,
2822 struct gfar_priv_grp, napi);
2823 struct gfar_private *priv = gfargrp->priv;
46ceb60c 2824 struct gfar __iomem *regs = gfargrp->regs;
a12f801d 2825 struct gfar_priv_tx_q *tx_queue = NULL;
fba4ed03
SG		 2826 struct gfar_priv_rx_q *rx_queue = NULL;
2827 int rx_cleaned = 0, budget_per_queue = 0, rx_cleaned_per_queue = 0;
18294ad1
AV		 2828 int tx_cleaned = 0, i, left_over_budget = budget;
2829 unsigned long serviced_queues = 0;
fba4ed03 2830 int num_queues = 0;
d080cd63 2831
fba4ed03
SG		 2832 num_queues = gfargrp->num_rx_queues;
2833 budget_per_queue = budget/num_queues;
2834
8c7396ae
DH		 2835 /* Clear IEVENT, so interrupts aren't called again
2836 * because of the packets that have already arrived */
f4983704 2837 gfar_write(&regs->ievent, IEVENT_RTX_MASK);
8c7396ae 2838
fba4ed03 2839 while (num_queues && left_over_budget) {
1da177e4 2840
fba4ed03
SG		 2841 budget_per_queue = left_over_budget/num_queues;
2842 left_over_budget = 0;
2843
984b3f57 2844 for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
fba4ed03
SG		 2845 if (test_bit(i, &serviced_queues))
2846 continue;
2847 rx_queue = priv->rx_queue[i];
2848 tx_queue = priv->tx_queue[rx_queue->qindex];
2849
a3bc1f11 2850 tx_cleaned += gfar_clean_tx_ring(tx_queue);
fba4ed03
SG		 2851 rx_cleaned_per_queue = gfar_clean_rx_ring(rx_queue,
2852 budget_per_queue);
2853 rx_cleaned += rx_cleaned_per_queue;
2854 if(rx_cleaned_per_queue < budget_per_queue) {
2855 left_over_budget = left_over_budget +
2856 (budget_per_queue - rx_cleaned_per_queue);
2857 set_bit(i, &serviced_queues);
2858 num_queues--;
2859 }
2860 }
2861 }
1da177e4 2862
42199884
AF		 2863 if (tx_cleaned)
2864 return budget;
2865
2866 if (rx_cleaned < budget) {
288379f0 2867 napi_complete(napi);
1da177e4
LT		 2868
2869 /* Clear the halt bit in RSTAT */
fba4ed03 2870 gfar_write(&regs->rstat, gfargrp->rstat);
1da177e4 2871
f4983704 2872 gfar_write(&regs->imask, IMASK_DEFAULT);
1da177e4
LT		 2873
2874 /* If we are coalescing interrupts, update the timer */
2875 /* Otherwise, clear it */
46ceb60c
SG		 2876 gfar_configure_coalescing(priv,
2877 gfargrp->rx_bit_map, gfargrp->tx_bit_map);
1da177e4
LT		 2878 }
2879
42199884 2880 return rx_cleaned;
1da177e4 2881}
1da177e4 2882
f2d71c2d
VW		 2883#ifdef CONFIG_NET_POLL_CONTROLLER
2884/*
2885 * Polling 'interrupt' - used by things like netconsole to send skbs
2886 * without having to re-enable interrupts. It's not called while
2887 * the interrupt routine is executing.
2888 */
2889static void gfar_netpoll(struct net_device *dev)
2890{
2891 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 2892 int i = 0;
f2d71c2d
VW		 2893
2894 /* If the device has multiple interrupts, run tx/rx */
b31a1d8b 2895 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
46ceb60c
SG		 2896 for (i = 0; i < priv->num_grps; i++) {
2897 disable_irq(priv->gfargrp[i].interruptTransmit);
2898 disable_irq(priv->gfargrp[i].interruptReceive);
2899 disable_irq(priv->gfargrp[i].interruptError);
2900 gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2901 &priv->gfargrp[i]);
2902 enable_irq(priv->gfargrp[i].interruptError);
2903 enable_irq(priv->gfargrp[i].interruptReceive);
2904 enable_irq(priv->gfargrp[i].interruptTransmit);
2905 }
f2d71c2d 2906 } else {
46ceb60c
SG		 2907 for (i = 0; i < priv->num_grps; i++) {
2908 disable_irq(priv->gfargrp[i].interruptTransmit);
2909 gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2910 &priv->gfargrp[i]);
2911 enable_irq(priv->gfargrp[i].interruptTransmit);
43de004b 2912 }
f2d71c2d
VW		 2913 }
2914}
2915#endif
2916
1da177e4 2917/* The interrupt handler for devices with one interrupt */
f4983704 2918static irqreturn_t gfar_interrupt(int irq, void *grp_id)
1da177e4 2919{
f4983704 2920 struct gfar_priv_grp *gfargrp = grp_id;
1da177e4
LT		 2921
2922 /* Save ievent for future reference */
f4983704 2923 u32 events = gfar_read(&gfargrp->regs->ievent);
1da177e4 2924
1da177e4 2925 /* Check for reception */
538cc7ee 2926 if (events & IEVENT_RX_MASK)
f4983704 2927 gfar_receive(irq, grp_id);
1da177e4
LT		 2928
2929 /* Check for transmit completion */
538cc7ee 2930 if (events & IEVENT_TX_MASK)
f4983704 2931 gfar_transmit(irq, grp_id);
1da177e4 2932
538cc7ee
SS		 2933 /* Check for errors */
2934 if (events & IEVENT_ERR_MASK)
f4983704 2935 gfar_error(irq, grp_id);
1da177e4
LT		 2936
2937 return IRQ_HANDLED;
2938}
2939
1da177e4
LT		 2940/* Called every time the controller might need to be made
2941 * aware of new link state. The PHY code conveys this
bb40dcbb 2942 * information through variables in the phydev structure, and this
1da177e4
LT		 2943 * function converts those variables into the appropriate
2944 * register values, and can bring down the device if needed.
2945 */
2946static void adjust_link(struct net_device *dev)
2947{
2948 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 2949 struct gfar __iomem *regs = priv->gfargrp[0].regs;
bb40dcbb
AF		 2950 unsigned long flags;
2951 struct phy_device *phydev = priv->phydev;
2952 int new_state = 0;
2953
fba4ed03
SG		 2954 local_irq_save(flags);
2955 lock_tx_qs(priv);
2956
bb40dcbb
AF		 2957 if (phydev->link) {
2958 u32 tempval = gfar_read(&regs->maccfg2);
7f7f5316 2959 u32 ecntrl = gfar_read(&regs->ecntrl);
1da177e4 2960
1da177e4
LT		 2961 /* Now we make sure that we can be in full duplex mode.
2962 * If not, we operate in half-duplex mode. */
bb40dcbb
AF		 2963 if (phydev->duplex != priv->oldduplex) {
2964 new_state = 1;
2965 if (!(phydev->duplex))
1da177e4 2966 tempval &= ~(MACCFG2_FULL_DUPLEX);
bb40dcbb 2967 else
1da177e4 2968 tempval |= MACCFG2_FULL_DUPLEX;
1da177e4 2969
bb40dcbb 2970 priv->oldduplex = phydev->duplex;
1da177e4
LT		 2971 }
2972
bb40dcbb
AF		 2973 if (phydev->speed != priv->oldspeed) {
2974 new_state = 1;
2975 switch (phydev->speed) {
1da177e4 2976 case 1000:
1da177e4
LT		 2977 tempval =
2978 ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
f430e49e
LY		 2979
2980 ecntrl &= ~(ECNTRL_R100);
1da177e4
LT		 2981 break;
2982 case 100:
2983 case 10:
1da177e4
LT		 2984 tempval =
2985 ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
7f7f5316
AF		 2986
2987 /* Reduced mode distinguishes
2988 * between 10 and 100 */
2989 if (phydev->speed == SPEED_100)
2990 ecntrl |= ECNTRL_R100;
2991 else
2992 ecntrl &= ~(ECNTRL_R100);
1da177e4
LT		 2993 break;
2994 default:
0bbaf069
KG		 2995 if (netif_msg_link(priv))
2996 printk(KERN_WARNING
bb40dcbb
AF		 2997 "%s: Ack! Speed (%d) is not 10/100/1000!\n",
2998 dev->name, phydev->speed);
1da177e4
LT		 2999 break;
3000 }
3001
bb40dcbb 3002 priv->oldspeed = phydev->speed;
1da177e4
LT		 3003 }
3004
bb40dcbb 3005 gfar_write(&regs->maccfg2, tempval);
7f7f5316 3006 gfar_write(&regs->ecntrl, ecntrl);
bb40dcbb 3007
1da177e4 3008 if (!priv->oldlink) {
bb40dcbb 3009 new_state = 1;
1da177e4 3010 priv->oldlink = 1;
1da177e4 3011 }
bb40dcbb
AF		 3012 } else if (priv->oldlink) {
3013 new_state = 1;
3014 priv->oldlink = 0;
3015 priv->oldspeed = 0;
3016 priv->oldduplex = -1;
1da177e4 3017 }
1da177e4 3018
bb40dcbb
AF		 3019 if (new_state && netif_msg_link(priv))
3020 phy_print_status(phydev);
fba4ed03
SG		 3021 unlock_tx_qs(priv);
3022 local_irq_restore(flags);
bb40dcbb 3023}
1da177e4
LT		 3024
3025/* Update the hash table based on the current list of multicast
3026 * addresses we subscribe to. Also, change the promiscuity of
3027 * the device based on the flags (this function is called
3028 * whenever dev->flags is changed */
3029static void gfar_set_multi(struct net_device *dev)
3030{
22bedad3 3031 struct netdev_hw_addr *ha;
1da177e4 3032 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 3033 struct gfar __iomem *regs = priv->gfargrp[0].regs;
1da177e4
LT		 3034 u32 tempval;
3035
a12f801d 3036 if (dev->flags & IFF_PROMISC) {
1da177e4
LT		 3037 /* Set RCTRL to PROM */
3038 tempval = gfar_read(&regs->rctrl);
3039 tempval |= RCTRL_PROM;
3040 gfar_write(&regs->rctrl, tempval);
3041 } else {
3042 /* Set RCTRL to not PROM */
3043 tempval = gfar_read(&regs->rctrl);
3044 tempval &= ~(RCTRL_PROM);
3045 gfar_write(&regs->rctrl, tempval);
3046 }
6aa20a22 3047
a12f801d 3048 if (dev->flags & IFF_ALLMULTI) {
1da177e4 3049 /* Set the hash to rx all multicast frames */
0bbaf069
KG		 3050 gfar_write(&regs->igaddr0, 0xffffffff);
3051 gfar_write(&regs->igaddr1, 0xffffffff);
3052 gfar_write(&regs->igaddr2, 0xffffffff);
3053 gfar_write(&regs->igaddr3, 0xffffffff);
3054 gfar_write(&regs->igaddr4, 0xffffffff);
3055 gfar_write(&regs->igaddr5, 0xffffffff);
3056 gfar_write(&regs->igaddr6, 0xffffffff);
3057 gfar_write(&regs->igaddr7, 0xffffffff);
1da177e4
LT		 3058 gfar_write(&regs->gaddr0, 0xffffffff);
3059 gfar_write(&regs->gaddr1, 0xffffffff);
3060 gfar_write(&regs->gaddr2, 0xffffffff);
3061 gfar_write(&regs->gaddr3, 0xffffffff);
3062 gfar_write(&regs->gaddr4, 0xffffffff);
3063 gfar_write(&regs->gaddr5, 0xffffffff);
3064 gfar_write(&regs->gaddr6, 0xffffffff);
3065 gfar_write(&regs->gaddr7, 0xffffffff);
3066 } else {
7f7f5316
AF		 3067 int em_num;
3068 int idx;
3069
1da177e4 3070 /* zero out the hash */
0bbaf069
KG		 3071 gfar_write(&regs->igaddr0, 0x0);
3072 gfar_write(&regs->igaddr1, 0x0);
3073 gfar_write(&regs->igaddr2, 0x0);
3074 gfar_write(&regs->igaddr3, 0x0);
3075 gfar_write(&regs->igaddr4, 0x0);
3076 gfar_write(&regs->igaddr5, 0x0);
3077 gfar_write(&regs->igaddr6, 0x0);
3078 gfar_write(&regs->igaddr7, 0x0);
1da177e4
LT		 3079 gfar_write(&regs->gaddr0, 0x0);
3080 gfar_write(&regs->gaddr1, 0x0);
3081 gfar_write(&regs->gaddr2, 0x0);
3082 gfar_write(&regs->gaddr3, 0x0);
3083 gfar_write(&regs->gaddr4, 0x0);
3084 gfar_write(&regs->gaddr5, 0x0);
3085 gfar_write(&regs->gaddr6, 0x0);
3086 gfar_write(&regs->gaddr7, 0x0);
3087
7f7f5316
AF		 3088 /* If we have extended hash tables, we need to
3089 * clear the exact match registers to prepare for
3090 * setting them */
3091 if (priv->extended_hash) {
3092 em_num = GFAR_EM_NUM + 1;
3093 gfar_clear_exact_match(dev);
3094 idx = 1;
3095 } else {
3096 idx = 0;
3097 em_num = 0;
3098 }
3099
4cd24eaf 3100 if (netdev_mc_empty(dev))
1da177e4
LT		 3101 return;
3102
3103 /* Parse the list, and set the appropriate bits */
22bedad3 3104 netdev_for_each_mc_addr(ha, dev) {
7f7f5316 3105 if (idx < em_num) {
22bedad3 3106 gfar_set_mac_for_addr(dev, idx, ha->addr);
7f7f5316
AF		 3107 idx++;
3108 } else
22bedad3 3109 gfar_set_hash_for_addr(dev, ha->addr);
1da177e4
LT		 3110 }
3111 }
1da177e4
LT		 3112}
3113
7f7f5316
AF		 3114
3115/* Clears each of the exact match registers to zero, so they
3116 * don't interfere with normal reception */
3117static void gfar_clear_exact_match(struct net_device *dev)
3118{
3119 int idx;
b6bc7650 3120 static const u8 zero_arr[MAC_ADDR_LEN] = {0, 0, 0, 0, 0, 0};
7f7f5316
AF		 3121
3122 for(idx = 1;idx < GFAR_EM_NUM + 1;idx++)
b6bc7650 3123 gfar_set_mac_for_addr(dev, idx, zero_arr);
7f7f5316
AF		 3124}
3125
1da177e4
LT		 3126/* Set the appropriate hash bit for the given addr */
3127/* The algorithm works like so:
3128 * 1) Take the Destination Address (ie the multicast address), and
3129 * do a CRC on it (little endian), and reverse the bits of the
3130 * result.
3131 * 2) Use the 8 most significant bits as a hash into a 256-entry
3132 * table. The table is controlled through 8 32-bit registers:
3133 * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is
3134 * gaddr7. This means that the 3 most significant bits in the
3135 * hash index which gaddr register to use, and the 5 other bits
3136 * indicate which bit (assuming an IBM numbering scheme, which
3137 * for PowerPC (tm) is usually the case) in the register holds
3138 * the entry. */
3139static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
3140{
3141 u32 tempval;
3142 struct gfar_private *priv = netdev_priv(dev);
1da177e4 3143 u32 result = ether_crc(MAC_ADDR_LEN, addr);
0bbaf069
KG		 3144 int width = priv->hash_width;
3145 u8 whichbit = (result >> (32 - width)) & 0x1f;
3146 u8 whichreg = result >> (32 - width + 5);
1da177e4
LT		 3147 u32 value = (1 << (31-whichbit));
3148
0bbaf069 3149 tempval = gfar_read(priv->hash_regs[whichreg]);
1da177e4 3150 tempval |= value;
0bbaf069 3151 gfar_write(priv->hash_regs[whichreg], tempval);
1da177e4
LT		 3152}
3153
7f7f5316
AF		 3154
3155/* There are multiple MAC Address register pairs on some controllers
3156 * This function sets the numth pair to a given address
3157 */
b6bc7650
JP		 3158static void gfar_set_mac_for_addr(struct net_device *dev, int num,
3159 const u8 *addr)
7f7f5316
AF		 3160{
3161 struct gfar_private *priv = netdev_priv(dev);
46ceb60c 3162 struct gfar __iomem *regs = priv->gfargrp[0].regs;
7f7f5316
AF		 3163 int idx;
3164 char tmpbuf[MAC_ADDR_LEN];
3165 u32 tempval;
f4983704 3166 u32 __iomem *macptr = &regs->macstnaddr1;
7f7f5316
AF		 3167
3168 macptr += num*2;
3169
3170 /* Now copy it into the mac registers backwards, cuz */
3171 /* little endian is silly */
3172 for (idx = 0; idx < MAC_ADDR_LEN; idx++)
3173 tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx];
3174
3175 gfar_write(macptr, *((u32 *) (tmpbuf)));
3176
3177 tempval = *((u32 *) (tmpbuf + 4));
3178
3179 gfar_write(macptr+1, tempval);
3180}
3181
1da177e4 3182/* GFAR error interrupt handler */
f4983704 3183static irqreturn_t gfar_error(int irq, void *grp_id)
1da177e4 3184{
f4983704
SG		 3185 struct gfar_priv_grp *gfargrp = grp_id;
3186 struct gfar __iomem *regs = gfargrp->regs;
3187 struct gfar_private *priv= gfargrp->priv;
3188 struct net_device *dev = priv->ndev;
1da177e4
LT		 3189
3190 /* Save ievent for future reference */
f4983704 3191 u32 events = gfar_read(&regs->ievent);
1da177e4
LT		 3192
3193 /* Clear IEVENT */
f4983704 3194 gfar_write(&regs->ievent, events & IEVENT_ERR_MASK);
d87eb127
SW		 3195
3196 /* Magic Packet is not an error. */
b31a1d8b 3197 if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
d87eb127
SW		 3198 (events & IEVENT_MAG))
3199 events &= ~IEVENT_MAG;
1da177e4
LT		 3200
3201 /* Hmm... */
0bbaf069
KG		 3202 if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv))
3203 printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n",
f4983704 3204 dev->name, events, gfar_read(&regs->imask));
1da177e4
LT		 3205
3206 /* Update the error counters */
3207 if (events & IEVENT_TXE) {
09f75cd7 3208 dev->stats.tx_errors++;
1da177e4
LT		 3209
3210 if (events & IEVENT_LC)
09f75cd7 3211 dev->stats.tx_window_errors++;
1da177e4 3212 if (events & IEVENT_CRL)
09f75cd7 3213 dev->stats.tx_aborted_errors++;
1da177e4 3214 if (events & IEVENT_XFUN) {
836cf7fa
AV		 3215 unsigned long flags;
3216
0bbaf069 3217 if (netif_msg_tx_err(priv))
538cc7ee
SS		 3218 printk(KERN_DEBUG "%s: TX FIFO underrun, "
3219 "packet dropped.\n", dev->name);
09f75cd7 3220 dev->stats.tx_dropped++;
1da177e4
LT		 3221 priv->extra_stats.tx_underrun++;
3222
836cf7fa
AV		 3223 local_irq_save(flags);
3224 lock_tx_qs(priv);
3225
1da177e4 3226 /* Reactivate the Tx Queues */
fba4ed03 3227 gfar_write(&regs->tstat, gfargrp->tstat);
836cf7fa
AV		 3228
3229 unlock_tx_qs(priv);
3230 local_irq_restore(flags);
1da177e4 3231 }
0bbaf069
KG		 3232 if (netif_msg_tx_err(priv))
3233 printk(KERN_DEBUG "%s: Transmit Error\n", dev->name);
1da177e4
LT		 3234 }
3235 if (events & IEVENT_BSY) {
09f75cd7 3236 dev->stats.rx_errors++;
1da177e4
LT		 3237 priv->extra_stats.rx_bsy++;
3238
f4983704 3239 gfar_receive(irq, grp_id);
1da177e4 3240
0bbaf069 3241 if (netif_msg_rx_err(priv))
538cc7ee 3242 printk(KERN_DEBUG "%s: busy error (rstat: %x)\n",
f4983704 3243 dev->name, gfar_read(&regs->rstat));
1da177e4
LT		 3244 }
3245 if (events & IEVENT_BABR) {
09f75cd7 3246 dev->stats.rx_errors++;
1da177e4
LT		 3247 priv->extra_stats.rx_babr++;
3248
0bbaf069 3249 if (netif_msg_rx_err(priv))
538cc7ee 3250 printk(KERN_DEBUG "%s: babbling RX error\n", dev->name);
1da177e4
LT		 3251 }
3252 if (events & IEVENT_EBERR) {
3253 priv->extra_stats.eberr++;
0bbaf069 3254 if (netif_msg_rx_err(priv))
538cc7ee 3255 printk(KERN_DEBUG "%s: bus error\n", dev->name);
1da177e4 3256 }
0bbaf069 3257 if ((events & IEVENT_RXC) && netif_msg_rx_status(priv))
538cc7ee 3258 printk(KERN_DEBUG "%s: control frame\n", dev->name);
1da177e4
LT		 3259
3260 if (events & IEVENT_BABT) {
3261 priv->extra_stats.tx_babt++;
0bbaf069 3262 if (netif_msg_tx_err(priv))
538cc7ee 3263 printk(KERN_DEBUG "%s: babbling TX error\n", dev->name);
1da177e4
LT		 3264 }
3265 return IRQ_HANDLED;
3266}
3267
b31a1d8b
AF		 3268static struct of_device_id gfar_match[] =
3269{
3270 {
3271 .type = "network",
3272 .compatible = "gianfar",
3273 },
46ceb60c
SG		 3274 {
3275 .compatible = "fsl,etsec2",
3276 },
b31a1d8b
AF		 3277 {},
3278};
e72701ac 3279MODULE_DEVICE_TABLE(of, gfar_match);
b31a1d8b 3280
1da177e4 3281/* Structure for a device driver */
74888760 3282static struct platform_driver gfar_driver = {
4018294b
GL		 3283 .driver = {
3284 .name = "fsl-gianfar",
3285 .owner = THIS_MODULE,
3286 .pm = GFAR_PM_OPS,
3287 .of_match_table = gfar_match,
3288 },
1da177e4
LT		 3289 .probe = gfar_probe,
3290 .remove = gfar_remove,
3291};
3292
3293static int __init gfar_init(void)
3294{
74888760 3295 return platform_driver_register(&gfar_driver);
1da177e4
LT		 3296}
3297
3298static void __exit gfar_exit(void)
3299{
74888760 3300 platform_driver_unregister(&gfar_driver);
1da177e4
LT		 3301}
3302
3303module_init(gfar_init);
3304module_exit(gfar_exit);
3305
Linux 6.x block layer and io_uring tree(s)