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1/*
2 * PS3 gelic network driver.
3 *
4 * Copyright (C) 2007 Sony Computer Entertainment Inc.
5 * Copyright 2006, 2007 Sony Corporation
6 *
7 * This file is based on: spider_net.c
8 *
9 * (C) Copyright IBM Corp. 2005
10 *
11 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
12 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29#undef DEBUG
30
31#include <linux/interrupt.h>
32#include <linux/kernel.h>
33#include <linux/module.h>
34#include <linux/slab.h>
35
36#include <linux/etherdevice.h>
37#include <linux/ethtool.h>
38#include <linux/if_vlan.h>
39
40#include <linux/in.h>
41#include <linux/ip.h>
42#include <linux/tcp.h>
43
44#include <linux/dma-mapping.h>
45#include <net/checksum.h>
46#include <asm/firmware.h>
47#include <asm/ps3.h>
48#include <asm/lv1call.h>
49
50#include "ps3_gelic_net.h"
51#include "ps3_gelic_wireless.h"
52
53#define DRV_NAME "Gelic Network Driver"
54#define DRV_VERSION "2.0"
55
56MODULE_AUTHOR("SCE Inc.");
57MODULE_DESCRIPTION("Gelic Network driver");
58MODULE_LICENSE("GPL");
59
60
61/* set irq_mask */
62int gelic_card_set_irq_mask(struct gelic_card *card, u64 mask)
63{
64 int status;
65
66 status = lv1_net_set_interrupt_mask(bus_id(card), dev_id(card),
67 mask, 0);
68 if (status)
69 dev_info(ctodev(card),
70 "%s failed %d\n", __func__, status);
71 return status;
72}
73
74static void gelic_card_rx_irq_on(struct gelic_card *card)
75{
76 card->irq_mask |= GELIC_CARD_RXINT;
77 gelic_card_set_irq_mask(card, card->irq_mask);
78}
79static void gelic_card_rx_irq_off(struct gelic_card *card)
80{
81 card->irq_mask &= ~GELIC_CARD_RXINT;
82 gelic_card_set_irq_mask(card, card->irq_mask);
83}
84
85static void gelic_card_get_ether_port_status(struct gelic_card *card,
86 int inform)
87{
88 u64 v2;
89 struct net_device *ether_netdev;
90
91 lv1_net_control(bus_id(card), dev_id(card),
92 GELIC_LV1_GET_ETH_PORT_STATUS,
93 GELIC_LV1_VLAN_TX_ETHERNET_0, 0, 0,
94 &card->ether_port_status, &v2);
95
96 if (inform) {
97 ether_netdev = card->netdev[GELIC_PORT_ETHERNET_0];
98 if (card->ether_port_status & GELIC_LV1_ETHER_LINK_UP)
99 netif_carrier_on(ether_netdev);
100 else
101 netif_carrier_off(ether_netdev);
102 }
103}
104
105/**
106 * gelic_descr_get_status -- returns the status of a descriptor
107 * @descr: descriptor to look at
108 *
109 * returns the status as in the dmac_cmd_status field of the descriptor
110 */
111static enum gelic_descr_dma_status
112gelic_descr_get_status(struct gelic_descr *descr)
113{
114 return be32_to_cpu(descr->dmac_cmd_status) & GELIC_DESCR_DMA_STAT_MASK;
115}
116
117static int gelic_card_set_link_mode(struct gelic_card *card, int mode)
118{
119 int status;
120 u64 v1, v2;
121
122 status = lv1_net_control(bus_id(card), dev_id(card),
123 GELIC_LV1_SET_NEGOTIATION_MODE,
124 GELIC_LV1_PHY_ETHERNET_0, mode, 0, &v1, &v2);
125 if (status) {
126 pr_info("%s: failed setting negotiation mode %d\n", __func__,
127 status);
128 return -EBUSY;
129 }
130
131 card->link_mode = mode;
132 return 0;
133}
134
135/**
136 * gelic_card_disable_txdmac - disables the transmit DMA controller
137 * @card: card structure
138 *
139 * gelic_card_disable_txdmac terminates processing on the DMA controller by
140 * turing off DMA and issuing a force end
141 */
142static void gelic_card_disable_txdmac(struct gelic_card *card)
143{
144 int status;
145
146 /* this hvc blocks until the DMA in progress really stopped */
147 status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card));
148 if (status)
149 dev_err(ctodev(card),
150 "lv1_net_stop_tx_dma failed, status=%d\n", status);
151}
152
153/**
154 * gelic_card_enable_rxdmac - enables the receive DMA controller
155 * @card: card structure
156 *
157 * gelic_card_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
158 * in the GDADMACCNTR register
159 */
160static void gelic_card_enable_rxdmac(struct gelic_card *card)
161{
162 int status;
163
164#ifdef DEBUG
165 if (gelic_descr_get_status(card->rx_chain.head) !=
166 GELIC_DESCR_DMA_CARDOWNED) {
167 printk(KERN_ERR "%s: status=%x\n", __func__,
168 be32_to_cpu(card->rx_chain.head->dmac_cmd_status));
169 printk(KERN_ERR "%s: nextphy=%x\n", __func__,
170 be32_to_cpu(card->rx_chain.head->next_descr_addr));
171 printk(KERN_ERR "%s: head=%p\n", __func__,
172 card->rx_chain.head);
173 }
174#endif
175 status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
176 card->rx_chain.head->bus_addr, 0);
177 if (status)
178 dev_info(ctodev(card),
179 "lv1_net_start_rx_dma failed, status=%d\n", status);
180}
181
182/**
183 * gelic_card_disable_rxdmac - disables the receive DMA controller
184 * @card: card structure
185 *
186 * gelic_card_disable_rxdmac terminates processing on the DMA controller by
187 * turing off DMA and issuing a force end
188 */
189static void gelic_card_disable_rxdmac(struct gelic_card *card)
190{
191 int status;
192
193 /* this hvc blocks until the DMA in progress really stopped */
194 status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card));
195 if (status)
196 dev_err(ctodev(card),
197 "lv1_net_stop_rx_dma failed, %d\n", status);
198}
199
200/**
201 * gelic_descr_set_status -- sets the status of a descriptor
202 * @descr: descriptor to change
203 * @status: status to set in the descriptor
204 *
205 * changes the status to the specified value. Doesn't change other bits
206 * in the status
207 */
208static void gelic_descr_set_status(struct gelic_descr *descr,
209 enum gelic_descr_dma_status status)
210{
211 descr->dmac_cmd_status = cpu_to_be32(status |
212 (be32_to_cpu(descr->dmac_cmd_status) &
213 ~GELIC_DESCR_DMA_STAT_MASK));
214 /*
215 * dma_cmd_status field is used to indicate whether the descriptor
216 * is valid or not.
217 * Usually caller of this function wants to inform that to the
218 * hardware, so we assure here the hardware sees the change.
219 */
220 wmb();
221}
222
223/**
224 * gelic_card_reset_chain - reset status of a descriptor chain
225 * @card: card structure
226 * @chain: address of chain
227 * @start_descr: address of descriptor array
228 *
229 * Reset the status of dma descriptors to ready state
230 * and re-initialize the hardware chain for later use
231 */
232static void gelic_card_reset_chain(struct gelic_card *card,
233 struct gelic_descr_chain *chain,
234 struct gelic_descr *start_descr)
235{
236 struct gelic_descr *descr;
237
238 for (descr = start_descr; start_descr != descr->next; descr++) {
239 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
240 descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
241 }
242
243 chain->head = start_descr;
244 chain->tail = (descr - 1);
245
246 (descr - 1)->next_descr_addr = 0;
247}
248
249void gelic_card_up(struct gelic_card *card)
250{
251 pr_debug("%s: called\n", __func__);
252 mutex_lock(&card->updown_lock);
253 if (atomic_inc_return(&card->users) == 1) {
254 pr_debug("%s: real do\n", __func__);
255 /* enable irq */
256 gelic_card_set_irq_mask(card, card->irq_mask);
257 /* start rx */
258 gelic_card_enable_rxdmac(card);
259
260 napi_enable(&card->napi);
261 }
262 mutex_unlock(&card->updown_lock);
263 pr_debug("%s: done\n", __func__);
264}
265
266void gelic_card_down(struct gelic_card *card)
267{
268 u64 mask;
269 pr_debug("%s: called\n", __func__);
270 mutex_lock(&card->updown_lock);
271 if (atomic_dec_if_positive(&card->users) == 0) {
272 pr_debug("%s: real do\n", __func__);
273 napi_disable(&card->napi);
274 /*
275 * Disable irq. Wireless interrupts will
276 * be disabled later if any
277 */
278 mask = card->irq_mask & (GELIC_CARD_WLAN_EVENT_RECEIVED |
279 GELIC_CARD_WLAN_COMMAND_COMPLETED);
280 gelic_card_set_irq_mask(card, mask);
281 /* stop rx */
282 gelic_card_disable_rxdmac(card);
283 gelic_card_reset_chain(card, &card->rx_chain,
284 card->descr + GELIC_NET_TX_DESCRIPTORS);
285 /* stop tx */
286 gelic_card_disable_txdmac(card);
287 }
288 mutex_unlock(&card->updown_lock);
289 pr_debug("%s: done\n", __func__);
290}
291
292/**
293 * gelic_card_free_chain - free descriptor chain
294 * @card: card structure
295 * @descr_in: address of desc
296 */
297static void gelic_card_free_chain(struct gelic_card *card,
298 struct gelic_descr *descr_in)
299{
300 struct gelic_descr *descr;
301
302 for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) {
303 dma_unmap_single(ctodev(card), descr->bus_addr,
304 GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
305 descr->bus_addr = 0;
306 }
307}
308
309/**
310 * gelic_card_init_chain - links descriptor chain
311 * @card: card structure
312 * @chain: address of chain
313 * @start_descr: address of descriptor array
314 * @no: number of descriptors
315 *
316 * we manage a circular list that mirrors the hardware structure,
317 * except that the hardware uses bus addresses.
318 *
319 * returns 0 on success, <0 on failure
320 */
321static int gelic_card_init_chain(struct gelic_card *card,
322 struct gelic_descr_chain *chain,
323 struct gelic_descr *start_descr, int no)
324{
325 int i;
326 struct gelic_descr *descr;
327
328 descr = start_descr;
329 memset(descr, 0, sizeof(*descr) * no);
330
331 /* set up the hardware pointers in each descriptor */
332 for (i = 0; i < no; i++, descr++) {
333 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
334 descr->bus_addr =
335 dma_map_single(ctodev(card), descr,
336 GELIC_DESCR_SIZE,
337 DMA_BIDIRECTIONAL);
338
339 if (!descr->bus_addr)
340 goto iommu_error;
341
342 descr->next = descr + 1;
343 descr->prev = descr - 1;
344 }
345 /* make them as ring */
346 (descr - 1)->next = start_descr;
347 start_descr->prev = (descr - 1);
348
349 /* chain bus addr of hw descriptor */
350 descr = start_descr;
351 for (i = 0; i < no; i++, descr++) {
352 descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
353 }
354
355 chain->head = start_descr;
356 chain->tail = start_descr;
357
358 /* do not chain last hw descriptor */
359 (descr - 1)->next_descr_addr = 0;
360
361 return 0;
362
363iommu_error:
364 for (i--, descr--; 0 <= i; i--, descr--)
365 if (descr->bus_addr)
366 dma_unmap_single(ctodev(card), descr->bus_addr,
367 GELIC_DESCR_SIZE,
368 DMA_BIDIRECTIONAL);
369 return -ENOMEM;
370}
371
372/**
373 * gelic_descr_prepare_rx - reinitializes a rx descriptor
374 * @card: card structure
375 * @descr: descriptor to re-init
376 *
377 * return 0 on success, <0 on failure
378 *
379 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
380 * Activate the descriptor state-wise
381 */
382static int gelic_descr_prepare_rx(struct gelic_card *card,
383 struct gelic_descr *descr)
384{
385 int offset;
386 unsigned int bufsize;
387
388 if (gelic_descr_get_status(descr) != GELIC_DESCR_DMA_NOT_IN_USE)
389 dev_info(ctodev(card), "%s: ERROR status\n", __func__);
390 /* we need to round up the buffer size to a multiple of 128 */
391 bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN);
392
393 /* and we need to have it 128 byte aligned, therefore we allocate a
394 * bit more */
395 descr->skb = dev_alloc_skb(bufsize + GELIC_NET_RXBUF_ALIGN - 1);
396 if (!descr->skb) {
397 descr->buf_addr = 0; /* tell DMAC don't touch memory */
398 dev_info(ctodev(card),
399 "%s:allocate skb failed !!\n", __func__);
400 return -ENOMEM;
401 }
402 descr->buf_size = cpu_to_be32(bufsize);
403 descr->dmac_cmd_status = 0;
404 descr->result_size = 0;
405 descr->valid_size = 0;
406 descr->data_error = 0;
407
408 offset = ((unsigned long)descr->skb->data) &
409 (GELIC_NET_RXBUF_ALIGN - 1);
410 if (offset)
411 skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
412 /* io-mmu-map the skb */
413 descr->buf_addr = cpu_to_be32(dma_map_single(ctodev(card),
414 descr->skb->data,
415 GELIC_NET_MAX_MTU,
416 DMA_FROM_DEVICE));
417 if (!descr->buf_addr) {
418 dev_kfree_skb_any(descr->skb);
419 descr->skb = NULL;
420 dev_info(ctodev(card),
421 "%s:Could not iommu-map rx buffer\n", __func__);
422 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
423 return -ENOMEM;
424 } else {
425 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
426 return 0;
427 }
428}
429
430/**
431 * gelic_card_release_rx_chain - free all skb of rx descr
432 * @card: card structure
433 *
434 */
435static void gelic_card_release_rx_chain(struct gelic_card *card)
436{
437 struct gelic_descr *descr = card->rx_chain.head;
438
439 do {
440 if (descr->skb) {
441 dma_unmap_single(ctodev(card),
442 be32_to_cpu(descr->buf_addr),
443 descr->skb->len,
444 DMA_FROM_DEVICE);
445 descr->buf_addr = 0;
446 dev_kfree_skb_any(descr->skb);
447 descr->skb = NULL;
448 gelic_descr_set_status(descr,
449 GELIC_DESCR_DMA_NOT_IN_USE);
450 }
451 descr = descr->next;
452 } while (descr != card->rx_chain.head);
453}
454
455/**
456 * gelic_card_fill_rx_chain - fills descriptors/skbs in the rx chains
457 * @card: card structure
458 *
459 * fills all descriptors in the rx chain: allocates skbs
460 * and iommu-maps them.
461 * returns 0 on success, < 0 on failure
462 */
463static int gelic_card_fill_rx_chain(struct gelic_card *card)
464{
465 struct gelic_descr *descr = card->rx_chain.head;
466 int ret;
467
468 do {
469 if (!descr->skb) {
470 ret = gelic_descr_prepare_rx(card, descr);
471 if (ret)
472 goto rewind;
473 }
474 descr = descr->next;
475 } while (descr != card->rx_chain.head);
476
477 return 0;
478rewind:
479 gelic_card_release_rx_chain(card);
480 return ret;
481}
482
483/**
484 * gelic_card_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
485 * @card: card structure
486 *
487 * returns 0 on success, < 0 on failure
488 */
489static int gelic_card_alloc_rx_skbs(struct gelic_card *card)
490{
491 struct gelic_descr_chain *chain;
492 int ret;
493 chain = &card->rx_chain;
494 ret = gelic_card_fill_rx_chain(card);
495 chain->tail = card->rx_top->prev; /* point to the last */
496 return ret;
497}
498
499/**
500 * gelic_descr_release_tx - processes a used tx descriptor
501 * @card: card structure
502 * @descr: descriptor to release
503 *
504 * releases a used tx descriptor (unmapping, freeing of skb)
505 */
506static void gelic_descr_release_tx(struct gelic_card *card,
507 struct gelic_descr *descr)
508{
509 struct sk_buff *skb = descr->skb;
510
511 BUG_ON(!(be32_to_cpu(descr->data_status) & GELIC_DESCR_TX_TAIL));
512
513 dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr), skb->len,
514 DMA_TO_DEVICE);
515 dev_kfree_skb_any(skb);
516
517 descr->buf_addr = 0;
518 descr->buf_size = 0;
519 descr->next_descr_addr = 0;
520 descr->result_size = 0;
521 descr->valid_size = 0;
522 descr->data_status = 0;
523 descr->data_error = 0;
524 descr->skb = NULL;
525
526 /* set descr status */
527 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
528}
529
530static void gelic_card_stop_queues(struct gelic_card *card)
531{
532 netif_stop_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
533
534 if (card->netdev[GELIC_PORT_WIRELESS])
535 netif_stop_queue(card->netdev[GELIC_PORT_WIRELESS]);
536}
537static void gelic_card_wake_queues(struct gelic_card *card)
538{
539 netif_wake_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
540
541 if (card->netdev[GELIC_PORT_WIRELESS])
542 netif_wake_queue(card->netdev[GELIC_PORT_WIRELESS]);
543}
544/**
545 * gelic_card_release_tx_chain - processes sent tx descriptors
546 * @card: adapter structure
547 * @stop: net_stop sequence
548 *
549 * releases the tx descriptors that gelic has finished with
550 */
551static void gelic_card_release_tx_chain(struct gelic_card *card, int stop)
552{
553 struct gelic_descr_chain *tx_chain;
554 enum gelic_descr_dma_status status;
555 struct net_device *netdev;
556 int release = 0;
557
558 for (tx_chain = &card->tx_chain;
559 tx_chain->head != tx_chain->tail && tx_chain->tail;
560 tx_chain->tail = tx_chain->tail->next) {
561 status = gelic_descr_get_status(tx_chain->tail);
562 netdev = tx_chain->tail->skb->dev;
563 switch (status) {
564 case GELIC_DESCR_DMA_RESPONSE_ERROR:
565 case GELIC_DESCR_DMA_PROTECTION_ERROR:
566 case GELIC_DESCR_DMA_FORCE_END:
567 if (printk_ratelimit())
568 dev_info(ctodev(card),
569 "%s: forcing end of tx descriptor " \
570 "with status %x\n",
571 __func__, status);
572 netdev->stats.tx_dropped++;
573 break;
574
575 case GELIC_DESCR_DMA_COMPLETE:
576 if (tx_chain->tail->skb) {
577 netdev->stats.tx_packets++;
578 netdev->stats.tx_bytes +=
579 tx_chain->tail->skb->len;
580 }
581 break;
582
583 case GELIC_DESCR_DMA_CARDOWNED:
584 /* pending tx request */
585 default:
586 /* any other value (== GELIC_DESCR_DMA_NOT_IN_USE) */
587 if (!stop)
588 goto out;
589 }
590 gelic_descr_release_tx(card, tx_chain->tail);
591 release ++;
592 }
593out:
594 if (!stop && release)
595 gelic_card_wake_queues(card);
596}
597
598/**
599 * gelic_net_set_multi - sets multicast addresses and promisc flags
600 * @netdev: interface device structure
601 *
602 * gelic_net_set_multi configures multicast addresses as needed for the
603 * netdev interface. It also sets up multicast, allmulti and promisc
604 * flags appropriately
605 */
606void gelic_net_set_multi(struct net_device *netdev)
607{
608 struct gelic_card *card = netdev_card(netdev);
609 struct netdev_hw_addr *ha;
610 unsigned int i;
611 uint8_t *p;
612 u64 addr;
613 int status;
614
615 /* clear all multicast address */
616 status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
617 0, 1);
618 if (status)
619 dev_err(ctodev(card),
620 "lv1_net_remove_multicast_address failed %d\n",
621 status);
622 /* set broadcast address */
623 status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
624 GELIC_NET_BROADCAST_ADDR, 0);
625 if (status)
626 dev_err(ctodev(card),
627 "lv1_net_add_multicast_address failed, %d\n",
628 status);
629
630 if ((netdev->flags & IFF_ALLMULTI) ||
631 (netdev_mc_count(netdev) > GELIC_NET_MC_COUNT_MAX)) {
632 status = lv1_net_add_multicast_address(bus_id(card),
633 dev_id(card),
634 0, 1);
635 if (status)
636 dev_err(ctodev(card),
637 "lv1_net_add_multicast_address failed, %d\n",
638 status);
639 return;
640 }
641
642 /* set multicast addresses */
643 netdev_for_each_mc_addr(ha, netdev) {
644 addr = 0;
645 p = ha->addr;
646 for (i = 0; i < ETH_ALEN; i++) {
647 addr <<= 8;
648 addr |= *p++;
649 }
650 status = lv1_net_add_multicast_address(bus_id(card),
651 dev_id(card),
652 addr, 0);
653 if (status)
654 dev_err(ctodev(card),
655 "lv1_net_add_multicast_address failed, %d\n",
656 status);
657 }
658}
659
660/**
661 * gelic_net_stop - called upon ifconfig down
662 * @netdev: interface device structure
663 *
664 * always returns 0
665 */
666int gelic_net_stop(struct net_device *netdev)
667{
668 struct gelic_card *card;
669
670 pr_debug("%s: start\n", __func__);
671
672 netif_stop_queue(netdev);
673 netif_carrier_off(netdev);
674
675 card = netdev_card(netdev);
676 gelic_card_down(card);
677
678 pr_debug("%s: done\n", __func__);
679 return 0;
680}
681
682/**
683 * gelic_card_get_next_tx_descr - returns the next available tx descriptor
684 * @card: device structure to get descriptor from
685 *
686 * returns the address of the next descriptor, or NULL if not available.
687 */
688static struct gelic_descr *
689gelic_card_get_next_tx_descr(struct gelic_card *card)
690{
691 if (!card->tx_chain.head)
692 return NULL;
693 /* see if the next descriptor is free */
694 if (card->tx_chain.tail != card->tx_chain.head->next &&
695 gelic_descr_get_status(card->tx_chain.head) ==
696 GELIC_DESCR_DMA_NOT_IN_USE)
697 return card->tx_chain.head;
698 else
699 return NULL;
700
701}
702
703/**
704 * gelic_net_set_txdescr_cmdstat - sets the tx descriptor command field
705 * @descr: descriptor structure to fill out
706 * @skb: packet to consider
707 *
708 * fills out the command and status field of the descriptor structure,
709 * depending on hardware checksum settings. This function assumes a wmb()
710 * has executed before.
711 */
712static void gelic_descr_set_tx_cmdstat(struct gelic_descr *descr,
713 struct sk_buff *skb)
714{
715 if (skb->ip_summed != CHECKSUM_PARTIAL)
716 descr->dmac_cmd_status =
717 cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
718 GELIC_DESCR_TX_DMA_FRAME_TAIL);
719 else {
720 /* is packet ip?
721 * if yes: tcp? udp? */
722 if (skb->protocol == htons(ETH_P_IP)) {
723 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
724 descr->dmac_cmd_status =
725 cpu_to_be32(GELIC_DESCR_DMA_CMD_TCP_CHKSUM |
726 GELIC_DESCR_TX_DMA_FRAME_TAIL);
727
728 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
729 descr->dmac_cmd_status =
730 cpu_to_be32(GELIC_DESCR_DMA_CMD_UDP_CHKSUM |
731 GELIC_DESCR_TX_DMA_FRAME_TAIL);
732 else /*
733 * the stack should checksum non-tcp and non-udp
734 * packets on his own: NETIF_F_IP_CSUM
735 */
736 descr->dmac_cmd_status =
737 cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
738 GELIC_DESCR_TX_DMA_FRAME_TAIL);
739 }
740 }
741}
742
743static struct sk_buff *gelic_put_vlan_tag(struct sk_buff *skb,
744 unsigned short tag)
745{
746 struct vlan_ethhdr *veth;
747 static unsigned int c;
748
749 if (skb_headroom(skb) < VLAN_HLEN) {
750 struct sk_buff *sk_tmp = skb;
751 pr_debug("%s: hd=%d c=%ud\n", __func__, skb_headroom(skb), c);
752 skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
753 if (!skb)
754 return NULL;
755 dev_kfree_skb_any(sk_tmp);
756 }
757 veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
758
759 /* Move the mac addresses to the top of buffer */
760 memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
761
762 veth->h_vlan_proto = cpu_to_be16(ETH_P_8021Q);
763 veth->h_vlan_TCI = htons(tag);
764
765 return skb;
766}
767
768/**
769 * gelic_descr_prepare_tx - setup a descriptor for sending packets
770 * @card: card structure
771 * @descr: descriptor structure
772 * @skb: packet to use
773 *
774 * returns 0 on success, <0 on failure.
775 *
776 */
777static int gelic_descr_prepare_tx(struct gelic_card *card,
778 struct gelic_descr *descr,
779 struct sk_buff *skb)
780{
781 dma_addr_t buf;
782
783 if (card->vlan_required) {
784 struct sk_buff *skb_tmp;
785 enum gelic_port_type type;
786
787 type = netdev_port(skb->dev)->type;
788 skb_tmp = gelic_put_vlan_tag(skb,
789 card->vlan[type].tx);
790 if (!skb_tmp)
791 return -ENOMEM;
792 skb = skb_tmp;
793 }
794
795 buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE);
796
797 if (!buf) {
798 dev_err(ctodev(card),
799 "dma map 2 failed (%p, %i). Dropping packet\n",
800 skb->data, skb->len);
801 return -ENOMEM;
802 }
803
804 descr->buf_addr = cpu_to_be32(buf);
805 descr->buf_size = cpu_to_be32(skb->len);
806 descr->skb = skb;
807 descr->data_status = 0;
808 descr->next_descr_addr = 0; /* terminate hw descr */
809 gelic_descr_set_tx_cmdstat(descr, skb);
810
811 /* bump free descriptor pointer */
812 card->tx_chain.head = descr->next;
813 return 0;
814}
815
816/**
817 * gelic_card_kick_txdma - enables TX DMA processing
818 * @card: card structure
819 * @descr: descriptor address to enable TX processing at
820 *
821 */
822static int gelic_card_kick_txdma(struct gelic_card *card,
823 struct gelic_descr *descr)
824{
825 int status = 0;
826
827 if (card->tx_dma_progress)
828 return 0;
829
830 if (gelic_descr_get_status(descr) == GELIC_DESCR_DMA_CARDOWNED) {
831 card->tx_dma_progress = 1;
832 status = lv1_net_start_tx_dma(bus_id(card), dev_id(card),
833 descr->bus_addr, 0);
834 if (status) {
835 card->tx_dma_progress = 0;
836 dev_info(ctodev(card), "lv1_net_start_txdma failed," \
837 "status=%d\n", status);
838 }
839 }
840 return status;
841}
842
843/**
844 * gelic_net_xmit - transmits a frame over the device
845 * @skb: packet to send out
846 * @netdev: interface device structure
847 *
848 * returns 0 on success, <0 on failure
849 */
850int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
851{
852 struct gelic_card *card = netdev_card(netdev);
853 struct gelic_descr *descr;
854 int result;
855 unsigned long flags;
856
857 spin_lock_irqsave(&card->tx_lock, flags);
858
859 gelic_card_release_tx_chain(card, 0);
860
861 descr = gelic_card_get_next_tx_descr(card);
862 if (!descr) {
863 /*
864 * no more descriptors free
865 */
866 gelic_card_stop_queues(card);
867 spin_unlock_irqrestore(&card->tx_lock, flags);
868 return NETDEV_TX_BUSY;
869 }
870
871 result = gelic_descr_prepare_tx(card, descr, skb);
872 if (result) {
873 /*
874 * DMA map failed. As chances are that failure
875 * would continue, just release skb and return
876 */
877 netdev->stats.tx_dropped++;
878 dev_kfree_skb_any(skb);
879 spin_unlock_irqrestore(&card->tx_lock, flags);
880 return NETDEV_TX_OK;
881 }
882 /*
883 * link this prepared descriptor to previous one
884 * to achieve high performance
885 */
886 descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
887 /*
888 * as hardware descriptor is modified in the above lines,
889 * ensure that the hardware sees it
890 */
891 wmb();
892 if (gelic_card_kick_txdma(card, descr)) {
893 /*
894 * kick failed.
895 * release descriptor which was just prepared
896 */
897 netdev->stats.tx_dropped++;
898 /* don't trigger BUG_ON() in gelic_descr_release_tx */
899 descr->data_status = cpu_to_be32(GELIC_DESCR_TX_TAIL);
900 gelic_descr_release_tx(card, descr);
901 /* reset head */
902 card->tx_chain.head = descr;
903 /* reset hw termination */
904 descr->prev->next_descr_addr = 0;
905 dev_info(ctodev(card), "%s: kick failure\n", __func__);
906 }
907
908 spin_unlock_irqrestore(&card->tx_lock, flags);
909 return NETDEV_TX_OK;
910}
911
912/**
913 * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
914 * @descr: descriptor to process
915 * @card: card structure
916 * @netdev: net_device structure to be passed packet
917 *
918 * iommu-unmaps the skb, fills out skb structure and passes the data to the
919 * stack. The descriptor state is not changed.
920 */
921static void gelic_net_pass_skb_up(struct gelic_descr *descr,
922 struct gelic_card *card,
923 struct net_device *netdev)
924
925{
926 struct sk_buff *skb = descr->skb;
927 u32 data_status, data_error;
928
929 data_status = be32_to_cpu(descr->data_status);
930 data_error = be32_to_cpu(descr->data_error);
931 /* unmap skb buffer */
932 dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
933 GELIC_NET_MAX_MTU,
934 DMA_FROM_DEVICE);
935
936 skb_put(skb, be32_to_cpu(descr->valid_size)?
937 be32_to_cpu(descr->valid_size) :
938 be32_to_cpu(descr->result_size));
939 if (!descr->valid_size)
940 dev_info(ctodev(card), "buffer full %x %x %x\n",
941 be32_to_cpu(descr->result_size),
942 be32_to_cpu(descr->buf_size),
943 be32_to_cpu(descr->dmac_cmd_status));
944
945 descr->skb = NULL;
946 /*
947 * the card put 2 bytes vlan tag in front
948 * of the ethernet frame
949 */
950 skb_pull(skb, 2);
951 skb->protocol = eth_type_trans(skb, netdev);
952
953 /* checksum offload */
954 if (netdev->features & NETIF_F_RXCSUM) {
955 if ((data_status & GELIC_DESCR_DATA_STATUS_CHK_MASK) &&
956 (!(data_error & GELIC_DESCR_DATA_ERROR_CHK_MASK)))
957 skb->ip_summed = CHECKSUM_UNNECESSARY;
958 else
959 skb_checksum_none_assert(skb);
960 } else
961 skb_checksum_none_assert(skb);
962
963 /* update netdevice statistics */
964 netdev->stats.rx_packets++;
965 netdev->stats.rx_bytes += skb->len;
966
967 /* pass skb up to stack */
968 netif_receive_skb(skb);
969}
970
971/**
972 * gelic_card_decode_one_descr - processes an rx descriptor
973 * @card: card structure
974 *
975 * returns 1 if a packet has been sent to the stack, otherwise 0
976 *
977 * processes an rx descriptor by iommu-unmapping the data buffer and passing
978 * the packet up to the stack
979 */
980static int gelic_card_decode_one_descr(struct gelic_card *card)
981{
982 enum gelic_descr_dma_status status;
983 struct gelic_descr_chain *chain = &card->rx_chain;
984 struct gelic_descr *descr = chain->head;
985 struct net_device *netdev = NULL;
986 int dmac_chain_ended;
987
988 status = gelic_descr_get_status(descr);
989
990 if (status == GELIC_DESCR_DMA_CARDOWNED)
991 return 0;
992
993 if (status == GELIC_DESCR_DMA_NOT_IN_USE) {
994 dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
995 return 0;
996 }
997
998 /* netdevice select */
999 if (card->vlan_required) {
1000 unsigned int i;
1001 u16 vid;
1002 vid = *(u16 *)(descr->skb->data) & VLAN_VID_MASK;
1003 for (i = 0; i < GELIC_PORT_MAX; i++) {
1004 if (card->vlan[i].rx == vid) {
1005 netdev = card->netdev[i];
1006 break;
1007 }
1008 }
1009 if (GELIC_PORT_MAX <= i) {
1010 pr_info("%s: unknown packet vid=%x\n", __func__, vid);
1011 goto refill;
1012 }
1013 } else
1014 netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1015
1016 if ((status == GELIC_DESCR_DMA_RESPONSE_ERROR) ||
1017 (status == GELIC_DESCR_DMA_PROTECTION_ERROR) ||
1018 (status == GELIC_DESCR_DMA_FORCE_END)) {
1019 dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
1020 status);
1021 netdev->stats.rx_dropped++;
1022 goto refill;
1023 }
1024
1025 if (status == GELIC_DESCR_DMA_BUFFER_FULL) {
1026 /*
1027 * Buffer full would occur if and only if
1028 * the frame length was longer than the size of this
1029 * descriptor's buffer. If the frame length was equal
1030 * to or shorter than buffer'size, FRAME_END condition
1031 * would occur.
1032 * Anyway this frame was longer than the MTU,
1033 * just drop it.
1034 */
1035 dev_info(ctodev(card), "overlength frame\n");
1036 goto refill;
1037 }
1038 /*
1039 * descriptors any other than FRAME_END here should
1040 * be treated as error.
1041 */
1042 if (status != GELIC_DESCR_DMA_FRAME_END) {
1043 dev_dbg(ctodev(card), "RX descriptor with state %x\n",
1044 status);
1045 goto refill;
1046 }
1047
1048 /* ok, we've got a packet in descr */
1049 gelic_net_pass_skb_up(descr, card, netdev);
1050refill:
1051
1052 /* is the current descriptor terminated with next_descr == NULL? */
1053 dmac_chain_ended =
1054 be32_to_cpu(descr->dmac_cmd_status) &
1055 GELIC_DESCR_RX_DMA_CHAIN_END;
1056 /*
1057 * So that always DMAC can see the end
1058 * of the descriptor chain to avoid
1059 * from unwanted DMAC overrun.
1060 */
1061 descr->next_descr_addr = 0;
1062
1063 /* change the descriptor state: */
1064 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
1065
1066 /*
1067 * this call can fail, but for now, just leave this
1068 * descriptor without skb
1069 */
1070 gelic_descr_prepare_rx(card, descr);
1071
1072 chain->tail = descr;
1073 chain->head = descr->next;
1074
1075 /*
1076 * Set this descriptor the end of the chain.
1077 */
1078 descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
1079
1080 /*
1081 * If dmac chain was met, DMAC stopped.
1082 * thus re-enable it
1083 */
1084
1085 if (dmac_chain_ended)
1086 gelic_card_enable_rxdmac(card);
1087
1088 return 1;
1089}
1090
1091/**
1092 * gelic_net_poll - NAPI poll function called by the stack to return packets
1093 * @napi: napi structure
1094 * @budget: number of packets we can pass to the stack at most
1095 *
1096 * returns the number of the processed packets
1097 *
1098 */
1099static int gelic_net_poll(struct napi_struct *napi, int budget)
1100{
1101 struct gelic_card *card = container_of(napi, struct gelic_card, napi);
1102 int packets_done = 0;
1103
1104 while (packets_done < budget) {
1105 if (!gelic_card_decode_one_descr(card))
1106 break;
1107
1108 packets_done++;
1109 }
1110
1111 if (packets_done < budget) {
1112 napi_complete(napi);
1113 gelic_card_rx_irq_on(card);
1114 }
1115 return packets_done;
1116}
1117
1118/**
1119 * gelic_card_interrupt - event handler for gelic_net
1120 */
1121static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
1122{
1123 unsigned long flags;
1124 struct gelic_card *card = ptr;
1125 u64 status;
1126
1127 status = card->irq_status;
1128
1129 if (!status)
1130 return IRQ_NONE;
1131
1132 status &= card->irq_mask;
1133
1134 if (status & GELIC_CARD_RXINT) {
1135 gelic_card_rx_irq_off(card);
1136 napi_schedule(&card->napi);
1137 }
1138
1139 if (status & GELIC_CARD_TXINT) {
1140 spin_lock_irqsave(&card->tx_lock, flags);
1141 card->tx_dma_progress = 0;
1142 gelic_card_release_tx_chain(card, 0);
1143 /* kick outstanding tx descriptor if any */
1144 gelic_card_kick_txdma(card, card->tx_chain.tail);
1145 spin_unlock_irqrestore(&card->tx_lock, flags);
1146 }
1147
1148 /* ether port status changed */
1149 if (status & GELIC_CARD_PORT_STATUS_CHANGED)
1150 gelic_card_get_ether_port_status(card, 1);
1151
1152#ifdef CONFIG_GELIC_WIRELESS
1153 if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
1154 GELIC_CARD_WLAN_COMMAND_COMPLETED))
1155 gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
1156#endif
1157
1158 return IRQ_HANDLED;
1159}
1160
1161#ifdef CONFIG_NET_POLL_CONTROLLER
1162/**
1163 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1164 * @netdev: interface device structure
1165 *
1166 * see Documentation/networking/netconsole.txt
1167 */
1168void gelic_net_poll_controller(struct net_device *netdev)
1169{
1170 struct gelic_card *card = netdev_card(netdev);
1171
1172 gelic_card_set_irq_mask(card, 0);
1173 gelic_card_interrupt(netdev->irq, netdev);
1174 gelic_card_set_irq_mask(card, card->irq_mask);
1175}
1176#endif /* CONFIG_NET_POLL_CONTROLLER */
1177
1178/**
1179 * gelic_net_open - called upon ifconfig up
1180 * @netdev: interface device structure
1181 *
1182 * returns 0 on success, <0 on failure
1183 *
1184 * gelic_net_open allocates all the descriptors and memory needed for
1185 * operation, sets up multicast list and enables interrupts
1186 */
1187int gelic_net_open(struct net_device *netdev)
1188{
1189 struct gelic_card *card = netdev_card(netdev);
1190
1191 dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
1192
1193 gelic_card_up(card);
1194
1195 netif_start_queue(netdev);
1196 gelic_card_get_ether_port_status(card, 1);
1197
1198 dev_dbg(ctodev(card), " <- %s\n", __func__);
1199 return 0;
1200}
1201
1202void gelic_net_get_drvinfo(struct net_device *netdev,
1203 struct ethtool_drvinfo *info)
1204{
1205 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1206 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1207}
1208
1209static int gelic_ether_get_settings(struct net_device *netdev,
1210 struct ethtool_cmd *cmd)
1211{
1212 struct gelic_card *card = netdev_card(netdev);
1213
1214 gelic_card_get_ether_port_status(card, 0);
1215
1216 if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
1217 cmd->duplex = DUPLEX_FULL;
1218 else
1219 cmd->duplex = DUPLEX_HALF;
1220
1221 switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
1222 case GELIC_LV1_ETHER_SPEED_10:
1223 ethtool_cmd_speed_set(cmd, SPEED_10);
1224 break;
1225 case GELIC_LV1_ETHER_SPEED_100:
1226 ethtool_cmd_speed_set(cmd, SPEED_100);
1227 break;
1228 case GELIC_LV1_ETHER_SPEED_1000:
1229 ethtool_cmd_speed_set(cmd, SPEED_1000);
1230 break;
1231 default:
1232 pr_info("%s: speed unknown\n", __func__);
1233 ethtool_cmd_speed_set(cmd, SPEED_10);
1234 break;
1235 }
1236
1237 cmd->supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1238 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1239 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1240 SUPPORTED_1000baseT_Full;
1241 cmd->advertising = cmd->supported;
1242 if (card->link_mode & GELIC_LV1_ETHER_AUTO_NEG) {
1243 cmd->autoneg = AUTONEG_ENABLE;
1244 } else {
1245 cmd->autoneg = AUTONEG_DISABLE;
1246 cmd->advertising &= ~ADVERTISED_Autoneg;
1247 }
1248 cmd->port = PORT_TP;
1249
1250 return 0;
1251}
1252
1253static int gelic_ether_set_settings(struct net_device *netdev,
1254 struct ethtool_cmd *cmd)
1255{
1256 struct gelic_card *card = netdev_card(netdev);
1257 u64 mode;
1258 int ret;
1259
1260 if (cmd->autoneg == AUTONEG_ENABLE) {
1261 mode = GELIC_LV1_ETHER_AUTO_NEG;
1262 } else {
1263 switch (cmd->speed) {
1264 case SPEED_10:
1265 mode = GELIC_LV1_ETHER_SPEED_10;
1266 break;
1267 case SPEED_100:
1268 mode = GELIC_LV1_ETHER_SPEED_100;
1269 break;
1270 case SPEED_1000:
1271 mode = GELIC_LV1_ETHER_SPEED_1000;
1272 break;
1273 default:
1274 return -EINVAL;
1275 }
1276 if (cmd->duplex == DUPLEX_FULL)
1277 mode |= GELIC_LV1_ETHER_FULL_DUPLEX;
1278 else if (cmd->speed == SPEED_1000) {
1279 pr_info("1000 half duplex is not supported.\n");
1280 return -EINVAL;
1281 }
1282 }
1283
1284 ret = gelic_card_set_link_mode(card, mode);
1285
1286 if (ret)
1287 return ret;
1288
1289 return 0;
1290}
1291
1292static void gelic_net_get_wol(struct net_device *netdev,
1293 struct ethtool_wolinfo *wol)
1294{
1295 if (0 <= ps3_compare_firmware_version(2, 2, 0))
1296 wol->supported = WAKE_MAGIC;
1297 else
1298 wol->supported = 0;
1299
1300 wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
1301 memset(&wol->sopass, 0, sizeof(wol->sopass));
1302}
1303static int gelic_net_set_wol(struct net_device *netdev,
1304 struct ethtool_wolinfo *wol)
1305{
1306 int status;
1307 struct gelic_card *card;
1308 u64 v1, v2;
1309
1310 if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
1311 !capable(CAP_NET_ADMIN))
1312 return -EPERM;
1313
1314 if (wol->wolopts & ~WAKE_MAGIC)
1315 return -EINVAL;
1316
1317 card = netdev_card(netdev);
1318 if (wol->wolopts & WAKE_MAGIC) {
1319 status = lv1_net_control(bus_id(card), dev_id(card),
1320 GELIC_LV1_SET_WOL,
1321 GELIC_LV1_WOL_MAGIC_PACKET,
1322 0, GELIC_LV1_WOL_MP_ENABLE,
1323 &v1, &v2);
1324 if (status) {
1325 pr_info("%s: enabling WOL failed %d\n", __func__,
1326 status);
1327 status = -EIO;
1328 goto done;
1329 }
1330 status = lv1_net_control(bus_id(card), dev_id(card),
1331 GELIC_LV1_SET_WOL,
1332 GELIC_LV1_WOL_ADD_MATCH_ADDR,
1333 0, GELIC_LV1_WOL_MATCH_ALL,
1334 &v1, &v2);
1335 if (!status)
1336 ps3_sys_manager_set_wol(1);
1337 else {
1338 pr_info("%s: enabling WOL filter failed %d\n",
1339 __func__, status);
1340 status = -EIO;
1341 }
1342 } else {
1343 status = lv1_net_control(bus_id(card), dev_id(card),
1344 GELIC_LV1_SET_WOL,
1345 GELIC_LV1_WOL_MAGIC_PACKET,
1346 0, GELIC_LV1_WOL_MP_DISABLE,
1347 &v1, &v2);
1348 if (status) {
1349 pr_info("%s: disabling WOL failed %d\n", __func__,
1350 status);
1351 status = -EIO;
1352 goto done;
1353 }
1354 status = lv1_net_control(bus_id(card), dev_id(card),
1355 GELIC_LV1_SET_WOL,
1356 GELIC_LV1_WOL_DELETE_MATCH_ADDR,
1357 0, GELIC_LV1_WOL_MATCH_ALL,
1358 &v1, &v2);
1359 if (!status)
1360 ps3_sys_manager_set_wol(0);
1361 else {
1362 pr_info("%s: removing WOL filter failed %d\n",
1363 __func__, status);
1364 status = -EIO;
1365 }
1366 }
1367done:
1368 return status;
1369}
1370
1371static const struct ethtool_ops gelic_ether_ethtool_ops = {
1372 .get_drvinfo = gelic_net_get_drvinfo,
1373 .get_settings = gelic_ether_get_settings,
1374 .set_settings = gelic_ether_set_settings,
1375 .get_link = ethtool_op_get_link,
1376 .get_wol = gelic_net_get_wol,
1377 .set_wol = gelic_net_set_wol,
1378};
1379
1380/**
1381 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1382 * function (to be called not under interrupt status)
1383 * @work: work is context of tx timout task
1384 *
1385 * called as task when tx hangs, resets interface (if interface is up)
1386 */
1387static void gelic_net_tx_timeout_task(struct work_struct *work)
1388{
1389 struct gelic_card *card =
1390 container_of(work, struct gelic_card, tx_timeout_task);
1391 struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1392
1393 dev_info(ctodev(card), "%s:Timed out. Restarting...\n", __func__);
1394
1395 if (!(netdev->flags & IFF_UP))
1396 goto out;
1397
1398 netif_device_detach(netdev);
1399 gelic_net_stop(netdev);
1400
1401 gelic_net_open(netdev);
1402 netif_device_attach(netdev);
1403
1404out:
1405 atomic_dec(&card->tx_timeout_task_counter);
1406}
1407
1408/**
1409 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1410 * @netdev: interface device structure
1411 *
1412 * called, if tx hangs. Schedules a task that resets the interface
1413 */
1414void gelic_net_tx_timeout(struct net_device *netdev)
1415{
1416 struct gelic_card *card;
1417
1418 card = netdev_card(netdev);
1419 atomic_inc(&card->tx_timeout_task_counter);
1420 if (netdev->flags & IFF_UP)
1421 schedule_work(&card->tx_timeout_task);
1422 else
1423 atomic_dec(&card->tx_timeout_task_counter);
1424}
1425
1426static const struct net_device_ops gelic_netdevice_ops = {
1427 .ndo_open = gelic_net_open,
1428 .ndo_stop = gelic_net_stop,
1429 .ndo_start_xmit = gelic_net_xmit,
1430 .ndo_set_rx_mode = gelic_net_set_multi,
1431 .ndo_tx_timeout = gelic_net_tx_timeout,
1432 .ndo_set_mac_address = eth_mac_addr,
1433 .ndo_validate_addr = eth_validate_addr,
1434#ifdef CONFIG_NET_POLL_CONTROLLER
1435 .ndo_poll_controller = gelic_net_poll_controller,
1436#endif
1437};
1438
1439/**
1440 * gelic_ether_setup_netdev_ops - initialization of net_device operations
1441 * @netdev: net_device structure
1442 *
1443 * fills out function pointers in the net_device structure
1444 */
1445static void gelic_ether_setup_netdev_ops(struct net_device *netdev,
1446 struct napi_struct *napi)
1447{
1448 netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
1449 /* NAPI */
1450 netif_napi_add(netdev, napi, gelic_net_poll, NAPI_POLL_WEIGHT);
1451 netdev->ethtool_ops = &gelic_ether_ethtool_ops;
1452 netdev->netdev_ops = &gelic_netdevice_ops;
1453}
1454
1455/**
1456 * gelic_ether_setup_netdev - initialization of net_device
1457 * @netdev: net_device structure
1458 * @card: card structure
1459 *
1460 * Returns 0 on success or <0 on failure
1461 *
1462 * gelic_ether_setup_netdev initializes the net_device structure
1463 * and register it.
1464 **/
1465int gelic_net_setup_netdev(struct net_device *netdev, struct gelic_card *card)
1466{
1467 int status;
1468 u64 v1, v2;
1469
1470 netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1471
1472 netdev->features = NETIF_F_IP_CSUM;
1473 if (GELIC_CARD_RX_CSUM_DEFAULT)
1474 netdev->features |= NETIF_F_RXCSUM;
1475
1476 status = lv1_net_control(bus_id(card), dev_id(card),
1477 GELIC_LV1_GET_MAC_ADDRESS,
1478 0, 0, 0, &v1, &v2);
1479 v1 <<= 16;
1480 if (status || !is_valid_ether_addr((u8 *)&v1)) {
1481 dev_info(ctodev(card),
1482 "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
1483 __func__, status);
1484 return -EINVAL;
1485 }
1486 memcpy(netdev->dev_addr, &v1, ETH_ALEN);
1487
1488 if (card->vlan_required) {
1489 netdev->hard_header_len += VLAN_HLEN;
1490 /*
1491 * As vlan is internally used,
1492 * we can not receive vlan packets
1493 */
1494 netdev->features |= NETIF_F_VLAN_CHALLENGED;
1495 }
1496
1497 /* MTU range: 64 - 1518 */
1498 netdev->min_mtu = GELIC_NET_MIN_MTU;
1499 netdev->max_mtu = GELIC_NET_MAX_MTU;
1500
1501 status = register_netdev(netdev);
1502 if (status) {
1503 dev_err(ctodev(card), "%s:Couldn't register %s %d\n",
1504 __func__, netdev->name, status);
1505 return status;
1506 }
1507 dev_info(ctodev(card), "%s: MAC addr %pM\n",
1508 netdev->name, netdev->dev_addr);
1509
1510 return 0;
1511}
1512
1513/**
1514 * gelic_alloc_card_net - allocates net_device and card structure
1515 *
1516 * returns the card structure or NULL in case of errors
1517 *
1518 * the card and net_device structures are linked to each other
1519 */
1520#define GELIC_ALIGN (32)
1521static struct gelic_card *gelic_alloc_card_net(struct net_device **netdev)
1522{
1523 struct gelic_card *card;
1524 struct gelic_port *port;
1525 void *p;
1526 size_t alloc_size;
1527 /*
1528 * gelic requires dma descriptor is 32 bytes aligned and
1529 * the hypervisor requires irq_status is 8 bytes aligned.
1530 */
1531 BUILD_BUG_ON(offsetof(struct gelic_card, irq_status) % 8);
1532 BUILD_BUG_ON(offsetof(struct gelic_card, descr) % 32);
1533 alloc_size =
1534 sizeof(struct gelic_card) +
1535 sizeof(struct gelic_descr) * GELIC_NET_RX_DESCRIPTORS +
1536 sizeof(struct gelic_descr) * GELIC_NET_TX_DESCRIPTORS +
1537 GELIC_ALIGN - 1;
1538
1539 p = kzalloc(alloc_size, GFP_KERNEL);
1540 if (!p)
1541 return NULL;
1542 card = PTR_ALIGN(p, GELIC_ALIGN);
1543 card->unalign = p;
1544
1545 /*
1546 * alloc netdev
1547 */
1548 *netdev = alloc_etherdev(sizeof(struct gelic_port));
1549 if (!*netdev) {
1550 kfree(card->unalign);
1551 return NULL;
1552 }
1553 port = netdev_priv(*netdev);
1554
1555 /* gelic_port */
1556 port->netdev = *netdev;
1557 port->card = card;
1558 port->type = GELIC_PORT_ETHERNET_0;
1559
1560 /* gelic_card */
1561 card->netdev[GELIC_PORT_ETHERNET_0] = *netdev;
1562
1563 INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
1564 init_waitqueue_head(&card->waitq);
1565 atomic_set(&card->tx_timeout_task_counter, 0);
1566 mutex_init(&card->updown_lock);
1567 atomic_set(&card->users, 0);
1568
1569 return card;
1570}
1571
1572static void gelic_card_get_vlan_info(struct gelic_card *card)
1573{
1574 u64 v1, v2;
1575 int status;
1576 unsigned int i;
1577 struct {
1578 int tx;
1579 int rx;
1580 } vlan_id_ix[2] = {
1581 [GELIC_PORT_ETHERNET_0] = {
1582 .tx = GELIC_LV1_VLAN_TX_ETHERNET_0,
1583 .rx = GELIC_LV1_VLAN_RX_ETHERNET_0
1584 },
1585 [GELIC_PORT_WIRELESS] = {
1586 .tx = GELIC_LV1_VLAN_TX_WIRELESS,
1587 .rx = GELIC_LV1_VLAN_RX_WIRELESS
1588 }
1589 };
1590
1591 for (i = 0; i < ARRAY_SIZE(vlan_id_ix); i++) {
1592 /* tx tag */
1593 status = lv1_net_control(bus_id(card), dev_id(card),
1594 GELIC_LV1_GET_VLAN_ID,
1595 vlan_id_ix[i].tx,
1596 0, 0, &v1, &v2);
1597 if (status || !v1) {
1598 if (status != LV1_NO_ENTRY)
1599 dev_dbg(ctodev(card),
1600 "get vlan id for tx(%d) failed(%d)\n",
1601 vlan_id_ix[i].tx, status);
1602 card->vlan[i].tx = 0;
1603 card->vlan[i].rx = 0;
1604 continue;
1605 }
1606 card->vlan[i].tx = (u16)v1;
1607
1608 /* rx tag */
1609 status = lv1_net_control(bus_id(card), dev_id(card),
1610 GELIC_LV1_GET_VLAN_ID,
1611 vlan_id_ix[i].rx,
1612 0, 0, &v1, &v2);
1613 if (status || !v1) {
1614 if (status != LV1_NO_ENTRY)
1615 dev_info(ctodev(card),
1616 "get vlan id for rx(%d) failed(%d)\n",
1617 vlan_id_ix[i].rx, status);
1618 card->vlan[i].tx = 0;
1619 card->vlan[i].rx = 0;
1620 continue;
1621 }
1622 card->vlan[i].rx = (u16)v1;
1623
1624 dev_dbg(ctodev(card), "vlan_id[%d] tx=%02x rx=%02x\n",
1625 i, card->vlan[i].tx, card->vlan[i].rx);
1626 }
1627
1628 if (card->vlan[GELIC_PORT_ETHERNET_0].tx) {
1629 BUG_ON(!card->vlan[GELIC_PORT_WIRELESS].tx);
1630 card->vlan_required = 1;
1631 } else
1632 card->vlan_required = 0;
1633
1634 /* check wirelss capable firmware */
1635 if (ps3_compare_firmware_version(1, 6, 0) < 0) {
1636 card->vlan[GELIC_PORT_WIRELESS].tx = 0;
1637 card->vlan[GELIC_PORT_WIRELESS].rx = 0;
1638 }
1639
1640 dev_info(ctodev(card), "internal vlan %s\n",
1641 card->vlan_required? "enabled" : "disabled");
1642}
1643/**
1644 * ps3_gelic_driver_probe - add a device to the control of this driver
1645 */
1646static int ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
1647{
1648 struct gelic_card *card;
1649 struct net_device *netdev;
1650 int result;
1651
1652 pr_debug("%s: called\n", __func__);
1653
1654 udbg_shutdown_ps3gelic();
1655
1656 result = ps3_open_hv_device(dev);
1657
1658 if (result) {
1659 dev_dbg(&dev->core, "%s:ps3_open_hv_device failed\n",
1660 __func__);
1661 goto fail_open;
1662 }
1663
1664 result = ps3_dma_region_create(dev->d_region);
1665
1666 if (result) {
1667 dev_dbg(&dev->core, "%s:ps3_dma_region_create failed(%d)\n",
1668 __func__, result);
1669 BUG_ON("check region type");
1670 goto fail_dma_region;
1671 }
1672
1673 /* alloc card/netdevice */
1674 card = gelic_alloc_card_net(&netdev);
1675 if (!card) {
1676 dev_info(&dev->core, "%s:gelic_net_alloc_card failed\n",
1677 __func__);
1678 result = -ENOMEM;
1679 goto fail_alloc_card;
1680 }
1681 ps3_system_bus_set_drvdata(dev, card);
1682 card->dev = dev;
1683
1684 /* get internal vlan info */
1685 gelic_card_get_vlan_info(card);
1686
1687 card->link_mode = GELIC_LV1_ETHER_AUTO_NEG;
1688
1689 /* setup interrupt */
1690 result = lv1_net_set_interrupt_status_indicator(bus_id(card),
1691 dev_id(card),
1692 ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
1693 0);
1694
1695 if (result) {
1696 dev_dbg(&dev->core,
1697 "%s:set_interrupt_status_indicator failed: %s\n",
1698 __func__, ps3_result(result));
1699 result = -EIO;
1700 goto fail_status_indicator;
1701 }
1702
1703 result = ps3_sb_event_receive_port_setup(dev, PS3_BINDING_CPU_ANY,
1704 &card->irq);
1705
1706 if (result) {
1707 dev_info(ctodev(card),
1708 "%s:gelic_net_open_device failed (%d)\n",
1709 __func__, result);
1710 result = -EPERM;
1711 goto fail_alloc_irq;
1712 }
1713 result = request_irq(card->irq, gelic_card_interrupt,
1714 0, netdev->name, card);
1715
1716 if (result) {
1717 dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
1718 __func__, result);
1719 goto fail_request_irq;
1720 }
1721
1722 /* setup card structure */
1723 card->irq_mask = GELIC_CARD_RXINT | GELIC_CARD_TXINT |
1724 GELIC_CARD_PORT_STATUS_CHANGED;
1725
1726
1727 result = gelic_card_init_chain(card, &card->tx_chain,
1728 card->descr, GELIC_NET_TX_DESCRIPTORS);
1729 if (result)
1730 goto fail_alloc_tx;
1731 result = gelic_card_init_chain(card, &card->rx_chain,
1732 card->descr + GELIC_NET_TX_DESCRIPTORS,
1733 GELIC_NET_RX_DESCRIPTORS);
1734 if (result)
1735 goto fail_alloc_rx;
1736
1737 /* head of chain */
1738 card->tx_top = card->tx_chain.head;
1739 card->rx_top = card->rx_chain.head;
1740 dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
1741 card->rx_top, card->tx_top, sizeof(struct gelic_descr),
1742 GELIC_NET_RX_DESCRIPTORS);
1743 /* allocate rx skbs */
1744 result = gelic_card_alloc_rx_skbs(card);
1745 if (result)
1746 goto fail_alloc_skbs;
1747
1748 spin_lock_init(&card->tx_lock);
1749 card->tx_dma_progress = 0;
1750
1751 /* setup net_device structure */
1752 netdev->irq = card->irq;
1753 SET_NETDEV_DEV(netdev, &card->dev->core);
1754 gelic_ether_setup_netdev_ops(netdev, &card->napi);
1755 result = gelic_net_setup_netdev(netdev, card);
1756 if (result) {
1757 dev_dbg(&dev->core, "%s: setup_netdev failed %d\n",
1758 __func__, result);
1759 goto fail_setup_netdev;
1760 }
1761
1762#ifdef CONFIG_GELIC_WIRELESS
1763 result = gelic_wl_driver_probe(card);
1764 if (result) {
1765 dev_dbg(&dev->core, "%s: WL init failed\n", __func__);
1766 goto fail_setup_netdev;
1767 }
1768#endif
1769 pr_debug("%s: done\n", __func__);
1770 return 0;
1771
1772fail_setup_netdev:
1773fail_alloc_skbs:
1774 gelic_card_free_chain(card, card->rx_chain.head);
1775fail_alloc_rx:
1776 gelic_card_free_chain(card, card->tx_chain.head);
1777fail_alloc_tx:
1778 free_irq(card->irq, card);
1779 netdev->irq = 0;
1780fail_request_irq:
1781 ps3_sb_event_receive_port_destroy(dev, card->irq);
1782fail_alloc_irq:
1783 lv1_net_set_interrupt_status_indicator(bus_id(card),
1784 bus_id(card),
1785 0, 0);
1786fail_status_indicator:
1787 ps3_system_bus_set_drvdata(dev, NULL);
1788 kfree(netdev_card(netdev)->unalign);
1789 free_netdev(netdev);
1790fail_alloc_card:
1791 ps3_dma_region_free(dev->d_region);
1792fail_dma_region:
1793 ps3_close_hv_device(dev);
1794fail_open:
1795 return result;
1796}
1797
1798/**
1799 * ps3_gelic_driver_remove - remove a device from the control of this driver
1800 */
1801
1802static int ps3_gelic_driver_remove(struct ps3_system_bus_device *dev)
1803{
1804 struct gelic_card *card = ps3_system_bus_get_drvdata(dev);
1805 struct net_device *netdev0;
1806 pr_debug("%s: called\n", __func__);
1807
1808 /* set auto-negotiation */
1809 gelic_card_set_link_mode(card, GELIC_LV1_ETHER_AUTO_NEG);
1810
1811#ifdef CONFIG_GELIC_WIRELESS
1812 gelic_wl_driver_remove(card);
1813#endif
1814 /* stop interrupt */
1815 gelic_card_set_irq_mask(card, 0);
1816
1817 /* turn off DMA, force end */
1818 gelic_card_disable_rxdmac(card);
1819 gelic_card_disable_txdmac(card);
1820
1821 /* release chains */
1822 gelic_card_release_tx_chain(card, 1);
1823 gelic_card_release_rx_chain(card);
1824
1825 gelic_card_free_chain(card, card->tx_top);
1826 gelic_card_free_chain(card, card->rx_top);
1827
1828 netdev0 = card->netdev[GELIC_PORT_ETHERNET_0];
1829 /* disconnect event port */
1830 free_irq(card->irq, card);
1831 netdev0->irq = 0;
1832 ps3_sb_event_receive_port_destroy(card->dev, card->irq);
1833
1834 wait_event(card->waitq,
1835 atomic_read(&card->tx_timeout_task_counter) == 0);
1836
1837 lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
1838 0 , 0);
1839
1840 unregister_netdev(netdev0);
1841 kfree(netdev_card(netdev0)->unalign);
1842 free_netdev(netdev0);
1843
1844 ps3_system_bus_set_drvdata(dev, NULL);
1845
1846 ps3_dma_region_free(dev->d_region);
1847
1848 ps3_close_hv_device(dev);
1849
1850 pr_debug("%s: done\n", __func__);
1851 return 0;
1852}
1853
1854static struct ps3_system_bus_driver ps3_gelic_driver = {
1855 .match_id = PS3_MATCH_ID_GELIC,
1856 .probe = ps3_gelic_driver_probe,
1857 .remove = ps3_gelic_driver_remove,
1858 .shutdown = ps3_gelic_driver_remove,
1859 .core.name = "ps3_gelic_driver",
1860 .core.owner = THIS_MODULE,
1861};
1862
1863static int __init ps3_gelic_driver_init (void)
1864{
1865 return firmware_has_feature(FW_FEATURE_PS3_LV1)
1866 ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1867 : -ENODEV;
1868}
1869
1870static void __exit ps3_gelic_driver_exit (void)
1871{
1872 ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1873}
1874
1875module_init(ps3_gelic_driver_init);
1876module_exit(ps3_gelic_driver_exit);
1877
1878MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1879