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