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dm snapshot: implement iterate devices
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ps3_gelic_net.c
bloba3932c9f3406c9d4e75967fc392d759cffb78330
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/kernel.h>
32 #include <linux/module.h>
33
34 #include <linux/etherdevice.h>
35 #include <linux/ethtool.h>
36 #include <linux/if_vlan.h>
37
38 #include <linux/in.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41
42 #include <linux/dma-mapping.h>
43 #include <net/checksum.h>
44 #include <asm/firmware.h>
45 #include <asm/ps3.h>
46 #include <asm/lv1call.h>
47
48 #include "ps3_gelic_net.h"
49 #include "ps3_gelic_wireless.h"
50
51 #define DRV_NAME "Gelic Network Driver"
52 #define DRV_VERSION "2.0"
53
54 MODULE_AUTHOR("SCE Inc.");
55 MODULE_DESCRIPTION("Gelic Network driver");
56 MODULE_LICENSE("GPL");
57
58
59 static inline void gelic_card_enable_rxdmac(struct gelic_card *card);
60 static inline void gelic_card_disable_rxdmac(struct gelic_card *card);
61 static inline void gelic_card_disable_txdmac(struct gelic_card *card);
62 static inline void gelic_card_reset_chain(struct gelic_card *card,
63 struct gelic_descr_chain *chain,
64 struct gelic_descr *start_descr);
65
66 /* set irq_mask */
67 int gelic_card_set_irq_mask(struct gelic_card *card, u64 mask)
68 {
69 int status;
70
71 status = lv1_net_set_interrupt_mask(bus_id(card), dev_id(card),
72 mask, 0);
73 if (status)
74 dev_info(ctodev(card),
75 "%s failed %d\n", __func__, status);
76 return status;
77 }
78
79 static inline void gelic_card_rx_irq_on(struct gelic_card *card)
80 {
81 card->irq_mask |= GELIC_CARD_RXINT;
82 gelic_card_set_irq_mask(card, card->irq_mask);
83 }
84 static inline void gelic_card_rx_irq_off(struct gelic_card *card)
85 {
86 card->irq_mask &= ~GELIC_CARD_RXINT;
87 gelic_card_set_irq_mask(card, card->irq_mask);
88 }
89
90 static void gelic_card_get_ether_port_status(struct gelic_card *card,
91 int inform)
92 {
93 u64 v2;
94 struct net_device *ether_netdev;
95
96 lv1_net_control(bus_id(card), dev_id(card),
97 GELIC_LV1_GET_ETH_PORT_STATUS,
98 GELIC_LV1_VLAN_TX_ETHERNET, 0, 0,
99 &card->ether_port_status, &v2);
100
101 if (inform) {
102 ether_netdev = card->netdev[GELIC_PORT_ETHERNET];
103 if (card->ether_port_status & GELIC_LV1_ETHER_LINK_UP)
104 netif_carrier_on(ether_netdev);
105 else
106 netif_carrier_off(ether_netdev);
107 }
108 }
109
110 void gelic_card_up(struct gelic_card *card)
111 {
112 pr_debug("%s: called\n", __func__);
113 mutex_lock(&card->updown_lock);
114 if (atomic_inc_return(&card->users) == 1) {
115 pr_debug("%s: real do\n", __func__);
116 /* enable irq */
117 gelic_card_set_irq_mask(card, card->irq_mask);
118 /* start rx */
119 gelic_card_enable_rxdmac(card);
120
121 napi_enable(&card->napi);
122 }
123 mutex_unlock(&card->updown_lock);
124 pr_debug("%s: done\n", __func__);
125 }
126
127 void gelic_card_down(struct gelic_card *card)
128 {
129 u64 mask;
130 pr_debug("%s: called\n", __func__);
131 mutex_lock(&card->updown_lock);
132 if (atomic_dec_if_positive(&card->users) == 0) {
133 pr_debug("%s: real do\n", __func__);
134 napi_disable(&card->napi);
135 /*
136 * Disable irq. Wireless interrupts will
137 * be disabled later if any
138 */
139 mask = card->irq_mask & (GELIC_CARD_WLAN_EVENT_RECEIVED |
140 GELIC_CARD_WLAN_COMMAND_COMPLETED);
141 gelic_card_set_irq_mask(card, mask);
142 /* stop rx */
143 gelic_card_disable_rxdmac(card);
144 gelic_card_reset_chain(card, &card->rx_chain,
145 card->descr + GELIC_NET_TX_DESCRIPTORS);
146 /* stop tx */
147 gelic_card_disable_txdmac(card);
148 }
149 mutex_unlock(&card->updown_lock);
150 pr_debug("%s: done\n", __func__);
151 }
152
153 /**
154 * gelic_descr_get_status -- returns the status of a descriptor
155 * @descr: descriptor to look at
156 *
157 * returns the status as in the dmac_cmd_status field of the descriptor
158 */
159 static enum gelic_descr_dma_status
160 gelic_descr_get_status(struct gelic_descr *descr)
161 {
162 return be32_to_cpu(descr->dmac_cmd_status) & GELIC_DESCR_DMA_STAT_MASK;
163 }
164
165 /**
166 * gelic_descr_set_status -- sets the status of a descriptor
167 * @descr: descriptor to change
168 * @status: status to set in the descriptor
169 *
170 * changes the status to the specified value. Doesn't change other bits
171 * in the status
172 */
173 static void gelic_descr_set_status(struct gelic_descr *descr,
174 enum gelic_descr_dma_status status)
175 {
176 descr->dmac_cmd_status = cpu_to_be32(status |
177 (be32_to_cpu(descr->dmac_cmd_status) &
178 ~GELIC_DESCR_DMA_STAT_MASK));
179 /*
180 * dma_cmd_status field is used to indicate whether the descriptor
181 * is valid or not.
182 * Usually caller of this function wants to inform that to the
183 * hardware, so we assure here the hardware sees the change.
184 */
185 wmb();
186 }
187
188 /**
189 * gelic_card_free_chain - free descriptor chain
190 * @card: card structure
191 * @descr_in: address of desc
192 */
193 static void gelic_card_free_chain(struct gelic_card *card,
194 struct gelic_descr *descr_in)
195 {
196 struct gelic_descr *descr;
197
198 for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) {
199 dma_unmap_single(ctodev(card), descr->bus_addr,
200 GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
201 descr->bus_addr = 0;
202 }
203 }
204
205 /**
206 * gelic_card_init_chain - links descriptor chain
207 * @card: card structure
208 * @chain: address of chain
209 * @start_descr: address of descriptor array
210 * @no: number of descriptors
211 *
212 * we manage a circular list that mirrors the hardware structure,
213 * except that the hardware uses bus addresses.
214 *
215 * returns 0 on success, <0 on failure
216 */
217 static int __devinit gelic_card_init_chain(struct gelic_card *card,
218 struct gelic_descr_chain *chain,
219 struct gelic_descr *start_descr,
220 int no)
221 {
222 int i;
223 struct gelic_descr *descr;
224
225 descr = start_descr;
226 memset(descr, 0, sizeof(*descr) * no);
227
228 /* set up the hardware pointers in each descriptor */
229 for (i = 0; i < no; i++, descr++) {
230 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
231 descr->bus_addr =
232 dma_map_single(ctodev(card), descr,
233 GELIC_DESCR_SIZE,
234 DMA_BIDIRECTIONAL);
235
236 if (!descr->bus_addr)
237 goto iommu_error;
238
239 descr->next = descr + 1;
240 descr->prev = descr - 1;
241 }
242 /* make them as ring */
243 (descr - 1)->next = start_descr;
244 start_descr->prev = (descr - 1);
245
246 /* chain bus addr of hw descriptor */
247 descr = start_descr;
248 for (i = 0; i < no; i++, descr++) {
249 descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
250 }
251
252 chain->head = start_descr;
253 chain->tail = start_descr;
254
255 /* do not chain last hw descriptor */
256 (descr - 1)->next_descr_addr = 0;
257
258 return 0;
259
260 iommu_error:
261 for (i--, descr--; 0 <= i; i--, descr--)
262 if (descr->bus_addr)
263 dma_unmap_single(ctodev(card), descr->bus_addr,
264 GELIC_DESCR_SIZE,
265 DMA_BIDIRECTIONAL);
266 return -ENOMEM;
267 }
268
269 /**
270 * gelic_card_reset_chain - reset status of a descriptor chain
271 * @card: card structure
272 * @chain: address of chain
273 * @start_descr: address of descriptor array
274 *
275 * Reset the status of dma descriptors to ready state
276 * and re-initialize the hardware chain for later use
277 */
278 static void gelic_card_reset_chain(struct gelic_card *card,
279 struct gelic_descr_chain *chain,
280 struct gelic_descr *start_descr)
281 {
282 struct gelic_descr *descr;
283
284 for (descr = start_descr; start_descr != descr->next; descr++) {
285 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
286 descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
287 }
288
289 chain->head = start_descr;
290 chain->tail = (descr - 1);
291
292 (descr - 1)->next_descr_addr = 0;
293 }
294 /**
295 * gelic_descr_prepare_rx - reinitializes a rx descriptor
296 * @card: card structure
297 * @descr: descriptor to re-init
298 *
299 * return 0 on succes, <0 on failure
300 *
301 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
302 * Activate the descriptor state-wise
303 */
304 static int gelic_descr_prepare_rx(struct gelic_card *card,
305 struct gelic_descr *descr)
306 {
307 int offset;
308 unsigned int bufsize;
309
310 if (gelic_descr_get_status(descr) != GELIC_DESCR_DMA_NOT_IN_USE)
311 dev_info(ctodev(card), "%s: ERROR status \n", __func__);
312 /* we need to round up the buffer size to a multiple of 128 */
313 bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN);
314
315 /* and we need to have it 128 byte aligned, therefore we allocate a
316 * bit more */
317 descr->skb = dev_alloc_skb(bufsize + GELIC_NET_RXBUF_ALIGN - 1);
318 if (!descr->skb) {
319 descr->buf_addr = 0; /* tell DMAC don't touch memory */
320 dev_info(ctodev(card),
321 "%s:allocate skb failed !!\n", __func__);
322 return -ENOMEM;
323 }
324 descr->buf_size = cpu_to_be32(bufsize);
325 descr->dmac_cmd_status = 0;
326 descr->result_size = 0;
327 descr->valid_size = 0;
328 descr->data_error = 0;
329
330 offset = ((unsigned long)descr->skb->data) &
331 (GELIC_NET_RXBUF_ALIGN - 1);
332 if (offset)
333 skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
334 /* io-mmu-map the skb */
335 descr->buf_addr = cpu_to_be32(dma_map_single(ctodev(card),
336 descr->skb->data,
337 GELIC_NET_MAX_MTU,
338 DMA_FROM_DEVICE));
339 if (!descr->buf_addr) {
340 dev_kfree_skb_any(descr->skb);
341 descr->skb = NULL;
342 dev_info(ctodev(card),
343 "%s:Could not iommu-map rx buffer\n", __func__);
344 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
345 return -ENOMEM;
346 } else {
347 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
348 return 0;
349 }
350 }
351
352 /**
353 * gelic_card_release_rx_chain - free all skb of rx descr
354 * @card: card structure
355 *
356 */
357 static void gelic_card_release_rx_chain(struct gelic_card *card)
358 {
359 struct gelic_descr *descr = card->rx_chain.head;
360
361 do {
362 if (descr->skb) {
363 dma_unmap_single(ctodev(card),
364 be32_to_cpu(descr->buf_addr),
365 descr->skb->len,
366 DMA_FROM_DEVICE);
367 descr->buf_addr = 0;
368 dev_kfree_skb_any(descr->skb);
369 descr->skb = NULL;
370 gelic_descr_set_status(descr,
371 GELIC_DESCR_DMA_NOT_IN_USE);
372 }
373 descr = descr->next;
374 } while (descr != card->rx_chain.head);
375 }
376
377 /**
378 * gelic_card_fill_rx_chain - fills descriptors/skbs in the rx chains
379 * @card: card structure
380 *
381 * fills all descriptors in the rx chain: allocates skbs
382 * and iommu-maps them.
383 * returns 0 on success, < 0 on failure
384 */
385 static int gelic_card_fill_rx_chain(struct gelic_card *card)
386 {
387 struct gelic_descr *descr = card->rx_chain.head;
388 int ret;
389
390 do {
391 if (!descr->skb) {
392 ret = gelic_descr_prepare_rx(card, descr);
393 if (ret)
394 goto rewind;
395 }
396 descr = descr->next;
397 } while (descr != card->rx_chain.head);
398
399 return 0;
400 rewind:
401 gelic_card_release_rx_chain(card);
402 return ret;
403 }
404
405 /**
406 * gelic_card_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
407 * @card: card structure
408 *
409 * returns 0 on success, < 0 on failure
410 */
411 static int __devinit gelic_card_alloc_rx_skbs(struct gelic_card *card)
412 {
413 struct gelic_descr_chain *chain;
414 int ret;
415 chain = &card->rx_chain;
416 ret = gelic_card_fill_rx_chain(card);
417 chain->tail = card->rx_top->prev; /* point to the last */
418 return ret;
419 }
420
421 /**
422 * gelic_descr_release_tx - processes a used tx descriptor
423 * @card: card structure
424 * @descr: descriptor to release
425 *
426 * releases a used tx descriptor (unmapping, freeing of skb)
427 */
428 static void gelic_descr_release_tx(struct gelic_card *card,
429 struct gelic_descr *descr)
430 {
431 struct sk_buff *skb = descr->skb;
432
433 BUG_ON(!(be32_to_cpu(descr->data_status) & GELIC_DESCR_TX_TAIL));
434
435 dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr), skb->len,
436 DMA_TO_DEVICE);
437 dev_kfree_skb_any(skb);
438
439 descr->buf_addr = 0;
440 descr->buf_size = 0;
441 descr->next_descr_addr = 0;
442 descr->result_size = 0;
443 descr->valid_size = 0;
444 descr->data_status = 0;
445 descr->data_error = 0;
446 descr->skb = NULL;
447
448 /* set descr status */
449 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
450 }
451
452 static void gelic_card_stop_queues(struct gelic_card *card)
453 {
454 netif_stop_queue(card->netdev[GELIC_PORT_ETHERNET]);
455
456 if (card->netdev[GELIC_PORT_WIRELESS])
457 netif_stop_queue(card->netdev[GELIC_PORT_WIRELESS]);
458 }
459 static void gelic_card_wake_queues(struct gelic_card *card)
460 {
461 netif_wake_queue(card->netdev[GELIC_PORT_ETHERNET]);
462
463 if (card->netdev[GELIC_PORT_WIRELESS])
464 netif_wake_queue(card->netdev[GELIC_PORT_WIRELESS]);
465 }
466 /**
467 * gelic_card_release_tx_chain - processes sent tx descriptors
468 * @card: adapter structure
469 * @stop: net_stop sequence
470 *
471 * releases the tx descriptors that gelic has finished with
472 */
473 static void gelic_card_release_tx_chain(struct gelic_card *card, int stop)
474 {
475 struct gelic_descr_chain *tx_chain;
476 enum gelic_descr_dma_status status;
477 struct net_device *netdev;
478 int release = 0;
479
480 for (tx_chain = &card->tx_chain;
481 tx_chain->head != tx_chain->tail && tx_chain->tail;
482 tx_chain->tail = tx_chain->tail->next) {
483 status = gelic_descr_get_status(tx_chain->tail);
484 netdev = tx_chain->tail->skb->dev;
485 switch (status) {
486 case GELIC_DESCR_DMA_RESPONSE_ERROR:
487 case GELIC_DESCR_DMA_PROTECTION_ERROR:
488 case GELIC_DESCR_DMA_FORCE_END:
489 if (printk_ratelimit())
490 dev_info(ctodev(card),
491 "%s: forcing end of tx descriptor " \
492 "with status %x\n",
493 __func__, status);
494 netdev->stats.tx_dropped++;
495 break;
496
497 case GELIC_DESCR_DMA_COMPLETE:
498 if (tx_chain->tail->skb) {
499 netdev->stats.tx_packets++;
500 netdev->stats.tx_bytes +=
501 tx_chain->tail->skb->len;
502 }
503 break;
504
505 case GELIC_DESCR_DMA_CARDOWNED:
506 /* pending tx request */
507 default:
508 /* any other value (== GELIC_DESCR_DMA_NOT_IN_USE) */
509 if (!stop)
510 goto out;
511 }
512 gelic_descr_release_tx(card, tx_chain->tail);
513 release ++;
514 }
515 out:
516 if (!stop && release)
517 gelic_card_wake_queues(card);
518 }
519
520 /**
521 * gelic_net_set_multi - sets multicast addresses and promisc flags
522 * @netdev: interface device structure
523 *
524 * gelic_net_set_multi configures multicast addresses as needed for the
525 * netdev interface. It also sets up multicast, allmulti and promisc
526 * flags appropriately
527 */
528 void gelic_net_set_multi(struct net_device *netdev)
529 {
530 struct gelic_card *card = netdev_card(netdev);
531 struct dev_mc_list *mc;
532 unsigned int i;
533 uint8_t *p;
534 u64 addr;
535 int status;
536
537 /* clear all multicast address */
538 status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
539 0, 1);
540 if (status)
541 dev_err(ctodev(card),
542 "lv1_net_remove_multicast_address failed %d\n",
543 status);
544 /* set broadcast address */
545 status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
546 GELIC_NET_BROADCAST_ADDR, 0);
547 if (status)
548 dev_err(ctodev(card),
549 "lv1_net_add_multicast_address failed, %d\n",
550 status);
551
552 if ((netdev->flags & IFF_ALLMULTI) ||
553 (netdev->mc_count > GELIC_NET_MC_COUNT_MAX)) {
554 status = lv1_net_add_multicast_address(bus_id(card),
555 dev_id(card),
556 0, 1);
557 if (status)
558 dev_err(ctodev(card),
559 "lv1_net_add_multicast_address failed, %d\n",
560 status);
561 return;
562 }
563
564 /* set multicast addresses */
565 for (mc = netdev->mc_list; mc; mc = mc->next) {
566 addr = 0;
567 p = mc->dmi_addr;
568 for (i = 0; i < ETH_ALEN; i++) {
569 addr <<= 8;
570 addr |= *p++;
571 }
572 status = lv1_net_add_multicast_address(bus_id(card),
573 dev_id(card),
574 addr, 0);
575 if (status)
576 dev_err(ctodev(card),
577 "lv1_net_add_multicast_address failed, %d\n",
578 status);
579 }
580 }
581
582 /**
583 * gelic_card_enable_rxdmac - enables the receive DMA controller
584 * @card: card structure
585 *
586 * gelic_card_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
587 * in the GDADMACCNTR register
588 */
589 static inline void gelic_card_enable_rxdmac(struct gelic_card *card)
590 {
591 int status;
592
593 #ifdef DEBUG
594 if (gelic_descr_get_status(card->rx_chain.head) !=
595 GELIC_DESCR_DMA_CARDOWNED) {
596 printk(KERN_ERR "%s: status=%x\n", __func__,
597 be32_to_cpu(card->rx_chain.head->dmac_cmd_status));
598 printk(KERN_ERR "%s: nextphy=%x\n", __func__,
599 be32_to_cpu(card->rx_chain.head->next_descr_addr));
600 printk(KERN_ERR "%s: head=%p\n", __func__,
601 card->rx_chain.head);
602 }
603 #endif
604 status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
605 card->rx_chain.head->bus_addr, 0);
606 if (status)
607 dev_info(ctodev(card),
608 "lv1_net_start_rx_dma failed, status=%d\n", status);
609 }
610
611 /**
612 * gelic_card_disable_rxdmac - disables the receive DMA controller
613 * @card: card structure
614 *
615 * gelic_card_disable_rxdmac terminates processing on the DMA controller by
616 * turing off DMA and issueing a force end
617 */
618 static inline void gelic_card_disable_rxdmac(struct gelic_card *card)
619 {
620 int status;
621
622 /* this hvc blocks until the DMA in progress really stopped */
623 status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card), 0);
624 if (status)
625 dev_err(ctodev(card),
626 "lv1_net_stop_rx_dma faild, %d\n", status);
627 }
628
629 /**
630 * gelic_card_disable_txdmac - disables the transmit DMA controller
631 * @card: card structure
632 *
633 * gelic_card_disable_txdmac terminates processing on the DMA controller by
634 * turing off DMA and issueing a force end
635 */
636 static inline void gelic_card_disable_txdmac(struct gelic_card *card)
637 {
638 int status;
639
640 /* this hvc blocks until the DMA in progress really stopped */
641 status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card), 0);
642 if (status)
643 dev_err(ctodev(card),
644 "lv1_net_stop_tx_dma faild, status=%d\n", status);
645 }
646
647 /**
648 * gelic_net_stop - called upon ifconfig down
649 * @netdev: interface device structure
650 *
651 * always returns 0
652 */
653 int gelic_net_stop(struct net_device *netdev)
654 {
655 struct gelic_card *card;
656
657 pr_debug("%s: start\n", __func__);
658
659 netif_stop_queue(netdev);
660 netif_carrier_off(netdev);
661
662 card = netdev_card(netdev);
663 gelic_card_down(card);
664
665 pr_debug("%s: done\n", __func__);
666 return 0;
667 }
668
669 /**
670 * gelic_card_get_next_tx_descr - returns the next available tx descriptor
671 * @card: device structure to get descriptor from
672 *
673 * returns the address of the next descriptor, or NULL if not available.
674 */
675 static struct gelic_descr *
676 gelic_card_get_next_tx_descr(struct gelic_card *card)
677 {
678 if (!card->tx_chain.head)
679 return NULL;
680 /* see if the next descriptor is free */
681 if (card->tx_chain.tail != card->tx_chain.head->next &&
682 gelic_descr_get_status(card->tx_chain.head) ==
683 GELIC_DESCR_DMA_NOT_IN_USE)
684 return card->tx_chain.head;
685 else
686 return NULL;
687
688 }
689
690 /**
691 * gelic_net_set_txdescr_cmdstat - sets the tx descriptor command field
692 * @descr: descriptor structure to fill out
693 * @skb: packet to consider
694 *
695 * fills out the command and status field of the descriptor structure,
696 * depending on hardware checksum settings. This function assumes a wmb()
697 * has executed before.
698 */
699 static void gelic_descr_set_tx_cmdstat(struct gelic_descr *descr,
700 struct sk_buff *skb)
701 {
702 if (skb->ip_summed != CHECKSUM_PARTIAL)
703 descr->dmac_cmd_status =
704 cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
705 GELIC_DESCR_TX_DMA_FRAME_TAIL);
706 else {
707 /* is packet ip?
708 * if yes: tcp? udp? */
709 if (skb->protocol == htons(ETH_P_IP)) {
710 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
711 descr->dmac_cmd_status =
712 cpu_to_be32(GELIC_DESCR_DMA_CMD_TCP_CHKSUM |
713 GELIC_DESCR_TX_DMA_FRAME_TAIL);
714
715 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
716 descr->dmac_cmd_status =
717 cpu_to_be32(GELIC_DESCR_DMA_CMD_UDP_CHKSUM |
718 GELIC_DESCR_TX_DMA_FRAME_TAIL);
719 else /*
720 * the stack should checksum non-tcp and non-udp
721 * packets on his own: NETIF_F_IP_CSUM
722 */
723 descr->dmac_cmd_status =
724 cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
725 GELIC_DESCR_TX_DMA_FRAME_TAIL);
726 }
727 }
728 }
729
730 static inline struct sk_buff *gelic_put_vlan_tag(struct sk_buff *skb,
731 unsigned short tag)
732 {
733 struct vlan_ethhdr *veth;
734 static unsigned int c;
735
736 if (skb_headroom(skb) < VLAN_HLEN) {
737 struct sk_buff *sk_tmp = skb;
738 pr_debug("%s: hd=%d c=%ud\n", __func__, skb_headroom(skb), c);
739 skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
740 if (!skb)
741 return NULL;
742 dev_kfree_skb_any(sk_tmp);
743 }
744 veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
745
746 /* Move the mac addresses to the top of buffer */
747 memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
748
749 veth->h_vlan_proto = cpu_to_be16(ETH_P_8021Q);
750 veth->h_vlan_TCI = htons(tag);
751
752 return skb;
753 }
754
755 /**
756 * gelic_descr_prepare_tx - setup a descriptor for sending packets
757 * @card: card structure
758 * @descr: descriptor structure
759 * @skb: packet to use
760 *
761 * returns 0 on success, <0 on failure.
762 *
763 */
764 static int gelic_descr_prepare_tx(struct gelic_card *card,
765 struct gelic_descr *descr,
766 struct sk_buff *skb)
767 {
768 dma_addr_t buf;
769
770 if (card->vlan_required) {
771 struct sk_buff *skb_tmp;
772 enum gelic_port_type type;
773
774 type = netdev_port(skb->dev)->type;
775 skb_tmp = gelic_put_vlan_tag(skb,
776 card->vlan[type].tx);
777 if (!skb_tmp)
778 return -ENOMEM;
779 skb = skb_tmp;
780 }
781
782 buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE);
783
784 if (!buf) {
785 dev_err(ctodev(card),
786 "dma map 2 failed (%p, %i). Dropping packet\n",
787 skb->data, skb->len);
788 return -ENOMEM;
789 }
790
791 descr->buf_addr = cpu_to_be32(buf);
792 descr->buf_size = cpu_to_be32(skb->len);
793 descr->skb = skb;
794 descr->data_status = 0;
795 descr->next_descr_addr = 0; /* terminate hw descr */
796 gelic_descr_set_tx_cmdstat(descr, skb);
797
798 /* bump free descriptor pointer */
799 card->tx_chain.head = descr->next;
800 return 0;
801 }
802
803 /**
804 * gelic_card_kick_txdma - enables TX DMA processing
805 * @card: card structure
806 * @descr: descriptor address to enable TX processing at
807 *
808 */
809 static int gelic_card_kick_txdma(struct gelic_card *card,
810 struct gelic_descr *descr)
811 {
812 int status = 0;
813
814 if (card->tx_dma_progress)
815 return 0;
816
817 if (gelic_descr_get_status(descr) == GELIC_DESCR_DMA_CARDOWNED) {
818 card->tx_dma_progress = 1;
819 status = lv1_net_start_tx_dma(bus_id(card), dev_id(card),
820 descr->bus_addr, 0);
821 if (status)
822 dev_info(ctodev(card), "lv1_net_start_txdma failed," \
823 "status=%d\n", status);
824 }
825 return status;
826 }
827
828 /**
829 * gelic_net_xmit - transmits a frame over the device
830 * @skb: packet to send out
831 * @netdev: interface device structure
832 *
833 * returns 0 on success, <0 on failure
834 */
835 int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
836 {
837 struct gelic_card *card = netdev_card(netdev);
838 struct gelic_descr *descr;
839 int result;
840 unsigned long flags;
841
842 spin_lock_irqsave(&card->tx_lock, flags);
843
844 gelic_card_release_tx_chain(card, 0);
845
846 descr = gelic_card_get_next_tx_descr(card);
847 if (!descr) {
848 /*
849 * no more descriptors free
850 */
851 gelic_card_stop_queues(card);
852 spin_unlock_irqrestore(&card->tx_lock, flags);
853 return NETDEV_TX_BUSY;
854 }
855
856 result = gelic_descr_prepare_tx(card, descr, skb);
857 if (result) {
858 /*
859 * DMA map failed. As chanses are that failure
860 * would continue, just release skb and return
861 */
862 netdev->stats.tx_dropped++;
863 dev_kfree_skb_any(skb);
864 spin_unlock_irqrestore(&card->tx_lock, flags);
865 return NETDEV_TX_OK;
866 }
867 /*
868 * link this prepared descriptor to previous one
869 * to achieve high performance
870 */
871 descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
872 /*
873 * as hardware descriptor is modified in the above lines,
874 * ensure that the hardware sees it
875 */
876 wmb();
877 if (gelic_card_kick_txdma(card, descr)) {
878 /*
879 * kick failed.
880 * release descriptors which were just prepared
881 */
882 netdev->stats.tx_dropped++;
883 gelic_descr_release_tx(card, descr);
884 gelic_descr_release_tx(card, descr->next);
885 card->tx_chain.tail = descr->next->next;
886 dev_info(ctodev(card), "%s: kick failure\n", __func__);
887 } else {
888 /* OK, DMA started/reserved */
889 netdev->trans_start = jiffies;
890 }
891
892 spin_unlock_irqrestore(&card->tx_lock, flags);
893 return NETDEV_TX_OK;
894 }
895
896 /**
897 * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
898 * @descr: descriptor to process
899 * @card: card structure
900 * @netdev: net_device structure to be passed packet
901 *
902 * iommu-unmaps the skb, fills out skb structure and passes the data to the
903 * stack. The descriptor state is not changed.
904 */
905 static void gelic_net_pass_skb_up(struct gelic_descr *descr,
906 struct gelic_card *card,
907 struct net_device *netdev)
908
909 {
910 struct sk_buff *skb = descr->skb;
911 u32 data_status, data_error;
912
913 data_status = be32_to_cpu(descr->data_status);
914 data_error = be32_to_cpu(descr->data_error);
915 /* unmap skb buffer */
916 dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
917 GELIC_NET_MAX_MTU,
918 DMA_FROM_DEVICE);
919
920 skb_put(skb, be32_to_cpu(descr->valid_size)?
921 be32_to_cpu(descr->valid_size) :
922 be32_to_cpu(descr->result_size));
923 if (!descr->valid_size)
924 dev_info(ctodev(card), "buffer full %x %x %x\n",
925 be32_to_cpu(descr->result_size),
926 be32_to_cpu(descr->buf_size),
927 be32_to_cpu(descr->dmac_cmd_status));
928
929 descr->skb = NULL;
930 /*
931 * the card put 2 bytes vlan tag in front
932 * of the ethernet frame
933 */
934 skb_pull(skb, 2);
935 skb->protocol = eth_type_trans(skb, netdev);
936
937 /* checksum offload */
938 if (card->rx_csum) {
939 if ((data_status & GELIC_DESCR_DATA_STATUS_CHK_MASK) &&
940 (!(data_error & GELIC_DESCR_DATA_ERROR_CHK_MASK)))
941 skb->ip_summed = CHECKSUM_UNNECESSARY;
942 else
943 skb->ip_summed = CHECKSUM_NONE;
944 } else
945 skb->ip_summed = CHECKSUM_NONE;
946
947 /* update netdevice statistics */
948 netdev->stats.rx_packets++;
949 netdev->stats.rx_bytes += skb->len;
950
951 /* pass skb up to stack */
952 netif_receive_skb(skb);
953 }
954
955 /**
956 * gelic_card_decode_one_descr - processes an rx descriptor
957 * @card: card structure
958 *
959 * returns 1 if a packet has been sent to the stack, otherwise 0
960 *
961 * processes an rx descriptor by iommu-unmapping the data buffer and passing
962 * the packet up to the stack
963 */
964 static int gelic_card_decode_one_descr(struct gelic_card *card)
965 {
966 enum gelic_descr_dma_status status;
967 struct gelic_descr_chain *chain = &card->rx_chain;
968 struct gelic_descr *descr = chain->head;
969 struct net_device *netdev = NULL;
970 int dmac_chain_ended;
971
972 status = gelic_descr_get_status(descr);
973 /* is this descriptor terminated with next_descr == NULL? */
974 dmac_chain_ended =
975 be32_to_cpu(descr->dmac_cmd_status) &
976 GELIC_DESCR_RX_DMA_CHAIN_END;
977
978 if (status == GELIC_DESCR_DMA_CARDOWNED)
979 return 0;
980
981 if (status == GELIC_DESCR_DMA_NOT_IN_USE) {
982 dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
983 return 0;
984 }
985
986 /* netdevice select */
987 if (card->vlan_required) {
988 unsigned int i;
989 u16 vid;
990 vid = *(u16 *)(descr->skb->data) & VLAN_VID_MASK;
991 for (i = 0; i < GELIC_PORT_MAX; i++) {
992 if (card->vlan[i].rx == vid) {
993 netdev = card->netdev[i];
994 break;
995 }
996 };
997 if (GELIC_PORT_MAX <= i) {
998 pr_info("%s: unknown packet vid=%x\n", __func__, vid);
999 goto refill;
1000 }
1001 } else
1002 netdev = card->netdev[GELIC_PORT_ETHERNET];
1003
1004 if ((status == GELIC_DESCR_DMA_RESPONSE_ERROR) ||
1005 (status == GELIC_DESCR_DMA_PROTECTION_ERROR) ||
1006 (status == GELIC_DESCR_DMA_FORCE_END)) {
1007 dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
1008 status);
1009 netdev->stats.rx_dropped++;
1010 goto refill;
1011 }
1012
1013 if (status == GELIC_DESCR_DMA_BUFFER_FULL) {
1014 /*
1015 * Buffer full would occur if and only if
1016 * the frame length was longer than the size of this
1017 * descriptor's buffer. If the frame length was equal
1018 * to or shorter than buffer'size, FRAME_END condition
1019 * would occur.
1020 * Anyway this frame was longer than the MTU,
1021 * just drop it.
1022 */
1023 dev_info(ctodev(card), "overlength frame\n");
1024 goto refill;
1025 }
1026 /*
1027 * descriptoers any other than FRAME_END here should
1028 * be treated as error.
1029 */
1030 if (status != GELIC_DESCR_DMA_FRAME_END) {
1031 dev_dbg(ctodev(card), "RX descriptor with state %x\n",
1032 status);
1033 goto refill;
1034 }
1035
1036 /* ok, we've got a packet in descr */
1037 gelic_net_pass_skb_up(descr, card, netdev);
1038 refill:
1039 /*
1040 * So that always DMAC can see the end
1041 * of the descriptor chain to avoid
1042 * from unwanted DMAC overrun.
1043 */
1044 descr->next_descr_addr = 0;
1045
1046 /* change the descriptor state: */
1047 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
1048
1049 /*
1050 * this call can fail, but for now, just leave this
1051 * decriptor without skb
1052 */
1053 gelic_descr_prepare_rx(card, descr);
1054
1055 chain->tail = descr;
1056 chain->head = descr->next;
1057
1058 /*
1059 * Set this descriptor the end of the chain.
1060 */
1061 descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
1062
1063 /*
1064 * If dmac chain was met, DMAC stopped.
1065 * thus re-enable it
1066 */
1067 if (dmac_chain_ended) {
1068 card->rx_dma_restart_required = 1;
1069 dev_dbg(ctodev(card), "reenable rx dma scheduled\n");
1070 }
1071
1072 return 1;
1073 }
1074
1075 /**
1076 * gelic_net_poll - NAPI poll function called by the stack to return packets
1077 * @napi: napi structure
1078 * @budget: number of packets we can pass to the stack at most
1079 *
1080 * returns the number of the processed packets
1081 *
1082 */
1083 static int gelic_net_poll(struct napi_struct *napi, int budget)
1084 {
1085 struct gelic_card *card = container_of(napi, struct gelic_card, napi);
1086 int packets_done = 0;
1087
1088 while (packets_done < budget) {
1089 if (!gelic_card_decode_one_descr(card))
1090 break;
1091
1092 packets_done++;
1093 }
1094
1095 if (packets_done < budget) {
1096 napi_complete(napi);
1097 gelic_card_rx_irq_on(card);
1098 }
1099 return packets_done;
1100 }
1101 /**
1102 * gelic_net_change_mtu - changes the MTU of an interface
1103 * @netdev: interface device structure
1104 * @new_mtu: new MTU value
1105 *
1106 * returns 0 on success, <0 on failure
1107 */
1108 int gelic_net_change_mtu(struct net_device *netdev, int new_mtu)
1109 {
1110 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1111 * and mtu is outbound only anyway */
1112 if ((new_mtu < GELIC_NET_MIN_MTU) ||
1113 (new_mtu > GELIC_NET_MAX_MTU)) {
1114 return -EINVAL;
1115 }
1116 netdev->mtu = new_mtu;
1117 return 0;
1118 }
1119
1120 /**
1121 * gelic_card_interrupt - event handler for gelic_net
1122 */
1123 static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
1124 {
1125 unsigned long flags;
1126 struct gelic_card *card = ptr;
1127 u64 status;
1128
1129 status = card->irq_status;
1130
1131 if (!status)
1132 return IRQ_NONE;
1133
1134 status &= card->irq_mask;
1135
1136 if (card->rx_dma_restart_required) {
1137 card->rx_dma_restart_required = 0;
1138 gelic_card_enable_rxdmac(card);
1139 }
1140
1141 if (status & GELIC_CARD_RXINT) {
1142 gelic_card_rx_irq_off(card);
1143 napi_schedule(&card->napi);
1144 }
1145
1146 if (status & GELIC_CARD_TXINT) {
1147 spin_lock_irqsave(&card->tx_lock, flags);
1148 card->tx_dma_progress = 0;
1149 gelic_card_release_tx_chain(card, 0);
1150 /* kick outstanding tx descriptor if any */
1151 gelic_card_kick_txdma(card, card->tx_chain.tail);
1152 spin_unlock_irqrestore(&card->tx_lock, flags);
1153 }
1154
1155 /* ether port status changed */
1156 if (status & GELIC_CARD_PORT_STATUS_CHANGED)
1157 gelic_card_get_ether_port_status(card, 1);
1158
1159 #ifdef CONFIG_GELIC_WIRELESS
1160 if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
1161 GELIC_CARD_WLAN_COMMAND_COMPLETED))
1162 gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
1163 #endif
1164
1165 return IRQ_HANDLED;
1166 }
1167
1168 #ifdef CONFIG_NET_POLL_CONTROLLER
1169 /**
1170 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1171 * @netdev: interface device structure
1172 *
1173 * see Documentation/networking/netconsole.txt
1174 */
1175 void gelic_net_poll_controller(struct net_device *netdev)
1176 {
1177 struct gelic_card *card = netdev_card(netdev);
1178
1179 gelic_card_set_irq_mask(card, 0);
1180 gelic_card_interrupt(netdev->irq, netdev);
1181 gelic_card_set_irq_mask(card, card->irq_mask);
1182 }
1183 #endif /* CONFIG_NET_POLL_CONTROLLER */
1184
1185 /**
1186 * gelic_net_open - called upon ifonfig up
1187 * @netdev: interface device structure
1188 *
1189 * returns 0 on success, <0 on failure
1190 *
1191 * gelic_net_open allocates all the descriptors and memory needed for
1192 * operation, sets up multicast list and enables interrupts
1193 */
1194 int gelic_net_open(struct net_device *netdev)
1195 {
1196 struct gelic_card *card = netdev_card(netdev);
1197
1198 dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
1199
1200 gelic_card_up(card);
1201
1202 netif_start_queue(netdev);
1203 gelic_card_get_ether_port_status(card, 1);
1204
1205 dev_dbg(ctodev(card), " <- %s\n", __func__);
1206 return 0;
1207 }
1208
1209 void gelic_net_get_drvinfo(struct net_device *netdev,
1210 struct ethtool_drvinfo *info)
1211 {
1212 strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1);
1213 strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1);
1214 }
1215
1216 static int gelic_ether_get_settings(struct net_device *netdev,
1217 struct ethtool_cmd *cmd)
1218 {
1219 struct gelic_card *card = netdev_card(netdev);
1220
1221 gelic_card_get_ether_port_status(card, 0);
1222
1223 if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
1224 cmd->duplex = DUPLEX_FULL;
1225 else
1226 cmd->duplex = DUPLEX_HALF;
1227
1228 switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
1229 case GELIC_LV1_ETHER_SPEED_10:
1230 cmd->speed = SPEED_10;
1231 break;
1232 case GELIC_LV1_ETHER_SPEED_100:
1233 cmd->speed = SPEED_100;
1234 break;
1235 case GELIC_LV1_ETHER_SPEED_1000:
1236 cmd->speed = SPEED_1000;
1237 break;
1238 default:
1239 pr_info("%s: speed unknown\n", __func__);
1240 cmd->speed = SPEED_10;
1241 break;
1242 }
1243
1244 cmd->supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1245 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1246 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1247 SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full;
1248 cmd->advertising = cmd->supported;
1249 cmd->autoneg = AUTONEG_ENABLE; /* always enabled */
1250 cmd->port = PORT_TP;
1251
1252 return 0;
1253 }
1254
1255 u32 gelic_net_get_rx_csum(struct net_device *netdev)
1256 {
1257 struct gelic_card *card = netdev_card(netdev);
1258
1259 return card->rx_csum;
1260 }
1261
1262 int gelic_net_set_rx_csum(struct net_device *netdev, u32 data)
1263 {
1264 struct gelic_card *card = netdev_card(netdev);
1265
1266 card->rx_csum = data;
1267 return 0;
1268 }
1269
1270 static void gelic_net_get_wol(struct net_device *netdev,
1271 struct ethtool_wolinfo *wol)
1272 {
1273 if (0 <= ps3_compare_firmware_version(2, 2, 0))
1274 wol->supported = WAKE_MAGIC;
1275 else
1276 wol->supported = 0;
1277
1278 wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
1279 memset(&wol->sopass, 0, sizeof(wol->sopass));
1280 }
1281 static int gelic_net_set_wol(struct net_device *netdev,
1282 struct ethtool_wolinfo *wol)
1283 {
1284 int status;
1285 struct gelic_card *card;
1286 u64 v1, v2;
1287
1288 if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
1289 !capable(CAP_NET_ADMIN))
1290 return -EPERM;
1291
1292 if (wol->wolopts & ~WAKE_MAGIC)
1293 return -EINVAL;
1294
1295 card = netdev_card(netdev);
1296 if (wol->wolopts & WAKE_MAGIC) {
1297 status = lv1_net_control(bus_id(card), dev_id(card),
1298 GELIC_LV1_SET_WOL,
1299 GELIC_LV1_WOL_MAGIC_PACKET,
1300 0, GELIC_LV1_WOL_MP_ENABLE,
1301 &v1, &v2);
1302 if (status) {
1303 pr_info("%s: enabling WOL failed %d\n", __func__,
1304 status);
1305 status = -EIO;
1306 goto done;
1307 }
1308 status = lv1_net_control(bus_id(card), dev_id(card),
1309 GELIC_LV1_SET_WOL,
1310 GELIC_LV1_WOL_ADD_MATCH_ADDR,
1311 0, GELIC_LV1_WOL_MATCH_ALL,
1312 &v1, &v2);
1313 if (!status)
1314 ps3_sys_manager_set_wol(1);
1315 else {
1316 pr_info("%s: enabling WOL filter failed %d\n",
1317 __func__, status);
1318 status = -EIO;
1319 }
1320 } else {
1321 status = lv1_net_control(bus_id(card), dev_id(card),
1322 GELIC_LV1_SET_WOL,
1323 GELIC_LV1_WOL_MAGIC_PACKET,
1324 0, GELIC_LV1_WOL_MP_DISABLE,
1325 &v1, &v2);
1326 if (status) {
1327 pr_info("%s: disabling WOL failed %d\n", __func__,
1328 status);
1329 status = -EIO;
1330 goto done;
1331 }
1332 status = lv1_net_control(bus_id(card), dev_id(card),
1333 GELIC_LV1_SET_WOL,
1334 GELIC_LV1_WOL_DELETE_MATCH_ADDR,
1335 0, GELIC_LV1_WOL_MATCH_ALL,
1336 &v1, &v2);
1337 if (!status)
1338 ps3_sys_manager_set_wol(0);
1339 else {
1340 pr_info("%s: removing WOL filter failed %d\n",
1341 __func__, status);
1342 status = -EIO;
1343 }
1344 }
1345 done:
1346 return status;
1347 }
1348
1349 static struct ethtool_ops gelic_ether_ethtool_ops = {
1350 .get_drvinfo = gelic_net_get_drvinfo,
1351 .get_settings = gelic_ether_get_settings,
1352 .get_link = ethtool_op_get_link,
1353 .get_tx_csum = ethtool_op_get_tx_csum,
1354 .set_tx_csum = ethtool_op_set_tx_csum,
1355 .get_rx_csum = gelic_net_get_rx_csum,
1356 .set_rx_csum = gelic_net_set_rx_csum,
1357 .get_wol = gelic_net_get_wol,
1358 .set_wol = gelic_net_set_wol,
1359 };
1360
1361 /**
1362 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1363 * function (to be called not under interrupt status)
1364 * @work: work is context of tx timout task
1365 *
1366 * called as task when tx hangs, resets interface (if interface is up)
1367 */
1368 static void gelic_net_tx_timeout_task(struct work_struct *work)
1369 {
1370 struct gelic_card *card =
1371 container_of(work, struct gelic_card, tx_timeout_task);
1372 struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET];
1373
1374 dev_info(ctodev(card), "%s:Timed out. Restarting... \n", __func__);
1375
1376 if (!(netdev->flags & IFF_UP))
1377 goto out;
1378
1379 netif_device_detach(netdev);
1380 gelic_net_stop(netdev);
1381
1382 gelic_net_open(netdev);
1383 netif_device_attach(netdev);
1384
1385 out:
1386 atomic_dec(&card->tx_timeout_task_counter);
1387 }
1388
1389 /**
1390 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1391 * @netdev: interface device structure
1392 *
1393 * called, if tx hangs. Schedules a task that resets the interface
1394 */
1395 void gelic_net_tx_timeout(struct net_device *netdev)
1396 {
1397 struct gelic_card *card;
1398
1399 card = netdev_card(netdev);
1400 atomic_inc(&card->tx_timeout_task_counter);
1401 if (netdev->flags & IFF_UP)
1402 schedule_work(&card->tx_timeout_task);
1403 else
1404 atomic_dec(&card->tx_timeout_task_counter);
1405 }
1406
1407 static const struct net_device_ops gelic_netdevice_ops = {
1408 .ndo_open = gelic_net_open,
1409 .ndo_stop = gelic_net_stop,
1410 .ndo_start_xmit = gelic_net_xmit,
1411 .ndo_set_multicast_list = gelic_net_set_multi,
1412 .ndo_change_mtu = gelic_net_change_mtu,
1413 .ndo_tx_timeout = gelic_net_tx_timeout,
1414 .ndo_set_mac_address = eth_mac_addr,
1415 .ndo_validate_addr = eth_validate_addr,
1416 #ifdef CONFIG_NET_POLL_CONTROLLER
1417 .ndo_poll_controller = gelic_net_poll_controller,
1418 #endif
1419 };
1420
1421 /**
1422 * gelic_ether_setup_netdev_ops - initialization of net_device operations
1423 * @netdev: net_device structure
1424 *
1425 * fills out function pointers in the net_device structure
1426 */
1427 static void __devinit gelic_ether_setup_netdev_ops(struct net_device *netdev,
1428 struct napi_struct *napi)
1429 {
1430 netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
1431 /* NAPI */
1432 netif_napi_add(netdev, napi,
1433 gelic_net_poll, GELIC_NET_NAPI_WEIGHT);
1434 netdev->ethtool_ops = &gelic_ether_ethtool_ops;
1435 netdev->netdev_ops = &gelic_netdevice_ops;
1436 }
1437
1438 /**
1439 * gelic_ether_setup_netdev - initialization of net_device
1440 * @netdev: net_device structure
1441 * @card: card structure
1442 *
1443 * Returns 0 on success or <0 on failure
1444 *
1445 * gelic_ether_setup_netdev initializes the net_device structure
1446 * and register it.
1447 **/
1448 int __devinit gelic_net_setup_netdev(struct net_device *netdev,
1449 struct gelic_card *card)
1450 {
1451 int status;
1452 u64 v1, v2;
1453
1454 netdev->features = NETIF_F_IP_CSUM;
1455
1456 status = lv1_net_control(bus_id(card), dev_id(card),
1457 GELIC_LV1_GET_MAC_ADDRESS,
1458 0, 0, 0, &v1, &v2);
1459 v1 <<= 16;
1460 if (status || !is_valid_ether_addr((u8 *)&v1)) {
1461 dev_info(ctodev(card),
1462 "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
1463 __func__, status);
1464 return -EINVAL;
1465 }
1466 memcpy(netdev->dev_addr, &v1, ETH_ALEN);
1467
1468 if (card->vlan_required) {
1469 netdev->hard_header_len += VLAN_HLEN;
1470 /*
1471 * As vlan is internally used,
1472 * we can not receive vlan packets
1473 */
1474 netdev->features |= NETIF_F_VLAN_CHALLENGED;
1475 }
1476
1477 status = register_netdev(netdev);
1478 if (status) {
1479 dev_err(ctodev(card), "%s:Couldn't register %s %d\n",
1480 __func__, netdev->name, status);
1481 return status;
1482 }
1483 dev_info(ctodev(card), "%s: MAC addr %pM\n",
1484 netdev->name, netdev->dev_addr);
1485
1486 return 0;
1487 }
1488
1489 /**
1490 * gelic_alloc_card_net - allocates net_device and card structure
1491 *
1492 * returns the card structure or NULL in case of errors
1493 *
1494 * the card and net_device structures are linked to each other
1495 */
1496 #define GELIC_ALIGN (32)
1497 static struct gelic_card * __devinit gelic_alloc_card_net(struct net_device **netdev)
1498 {
1499 struct gelic_card *card;
1500 struct gelic_port *port;
1501 void *p;
1502 size_t alloc_size;
1503 /*
1504 * gelic requires dma descriptor is 32 bytes aligned and
1505 * the hypervisor requires irq_status is 8 bytes aligned.
1506 */
1507 BUILD_BUG_ON(offsetof(struct gelic_card, irq_status) % 8);
1508 BUILD_BUG_ON(offsetof(struct gelic_card, descr) % 32);
1509 alloc_size =
1510 sizeof(struct gelic_card) +
1511 sizeof(struct gelic_descr) * GELIC_NET_RX_DESCRIPTORS +
1512 sizeof(struct gelic_descr) * GELIC_NET_TX_DESCRIPTORS +
1513 GELIC_ALIGN - 1;
1514
1515 p = kzalloc(alloc_size, GFP_KERNEL);
1516 if (!p)
1517 return NULL;
1518 card = PTR_ALIGN(p, GELIC_ALIGN);
1519 card->unalign = p;
1520
1521 /*
1522 * alloc netdev
1523 */
1524 *netdev = alloc_etherdev(sizeof(struct gelic_port));
1525 if (!netdev) {
1526 kfree(card->unalign);
1527 return NULL;
1528 }
1529 port = netdev_priv(*netdev);
1530
1531 /* gelic_port */
1532 port->netdev = *netdev;
1533 port->card = card;
1534 port->type = GELIC_PORT_ETHERNET;
1535
1536 /* gelic_card */
1537 card->netdev[GELIC_PORT_ETHERNET] = *netdev;
1538
1539 INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
1540 init_waitqueue_head(&card->waitq);
1541 atomic_set(&card->tx_timeout_task_counter, 0);
1542 mutex_init(&card->updown_lock);
1543 atomic_set(&card->users, 0);
1544
1545 return card;
1546 }
1547
1548 static void __devinit gelic_card_get_vlan_info(struct gelic_card *card)
1549 {
1550 u64 v1, v2;
1551 int status;
1552 unsigned int i;
1553 struct {
1554 int tx;
1555 int rx;
1556 } vlan_id_ix[2] = {
1557 [GELIC_PORT_ETHERNET] = {
1558 .tx = GELIC_LV1_VLAN_TX_ETHERNET,
1559 .rx = GELIC_LV1_VLAN_RX_ETHERNET
1560 },
1561 [GELIC_PORT_WIRELESS] = {
1562 .tx = GELIC_LV1_VLAN_TX_WIRELESS,
1563 .rx = GELIC_LV1_VLAN_RX_WIRELESS
1564 }
1565 };
1566
1567 for (i = 0; i < ARRAY_SIZE(vlan_id_ix); i++) {
1568 /* tx tag */
1569 status = lv1_net_control(bus_id(card), dev_id(card),
1570 GELIC_LV1_GET_VLAN_ID,
1571 vlan_id_ix[i].tx,
1572 0, 0, &v1, &v2);
1573 if (status || !v1) {
1574 if (status != LV1_NO_ENTRY)
1575 dev_dbg(ctodev(card),
1576 "get vlan id for tx(%d) failed(%d)\n",
1577 vlan_id_ix[i].tx, status);
1578 card->vlan[i].tx = 0;
1579 card->vlan[i].rx = 0;
1580 continue;
1581 }
1582 card->vlan[i].tx = (u16)v1;
1583
1584 /* rx tag */
1585 status = lv1_net_control(bus_id(card), dev_id(card),
1586 GELIC_LV1_GET_VLAN_ID,
1587 vlan_id_ix[i].rx,
1588 0, 0, &v1, &v2);
1589 if (status || !v1) {
1590 if (status != LV1_NO_ENTRY)
1591 dev_info(ctodev(card),
1592 "get vlan id for rx(%d) failed(%d)\n",
1593 vlan_id_ix[i].rx, status);
1594 card->vlan[i].tx = 0;
1595 card->vlan[i].rx = 0;
1596 continue;
1597 }
1598 card->vlan[i].rx = (u16)v1;
1599
1600 dev_dbg(ctodev(card), "vlan_id[%d] tx=%02x rx=%02x\n",
1601 i, card->vlan[i].tx, card->vlan[i].rx);
1602 }
1603
1604 if (card->vlan[GELIC_PORT_ETHERNET].tx) {
1605 BUG_ON(!card->vlan[GELIC_PORT_WIRELESS].tx);
1606 card->vlan_required = 1;
1607 } else
1608 card->vlan_required = 0;
1609
1610 /* check wirelss capable firmware */
1611 if (ps3_compare_firmware_version(1, 6, 0) < 0) {
1612 card->vlan[GELIC_PORT_WIRELESS].tx = 0;
1613 card->vlan[GELIC_PORT_WIRELESS].rx = 0;
1614 }
1615
1616 dev_info(ctodev(card), "internal vlan %s\n",
1617 card->vlan_required? "enabled" : "disabled");
1618 }
1619 /**
1620 * ps3_gelic_driver_probe - add a device to the control of this driver
1621 */
1622 static int __devinit ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
1623 {
1624 struct gelic_card *card;
1625 struct net_device *netdev;
1626 int result;
1627
1628 pr_debug("%s: called\n", __func__);
1629 result = ps3_open_hv_device(dev);
1630
1631 if (result) {
1632 dev_dbg(&dev->core, "%s:ps3_open_hv_device failed\n",
1633 __func__);
1634 goto fail_open;
1635 }
1636
1637 result = ps3_dma_region_create(dev->d_region);
1638
1639 if (result) {
1640 dev_dbg(&dev->core, "%s:ps3_dma_region_create failed(%d)\n",
1641 __func__, result);
1642 BUG_ON("check region type");
1643 goto fail_dma_region;
1644 }
1645
1646 /* alloc card/netdevice */
1647 card = gelic_alloc_card_net(&netdev);
1648 if (!card) {
1649 dev_info(&dev->core, "%s:gelic_net_alloc_card failed\n",
1650 __func__);
1651 result = -ENOMEM;
1652 goto fail_alloc_card;
1653 }
1654 ps3_system_bus_set_drvdata(dev, card);
1655 card->dev = dev;
1656
1657 /* get internal vlan info */
1658 gelic_card_get_vlan_info(card);
1659
1660 /* setup interrupt */
1661 result = lv1_net_set_interrupt_status_indicator(bus_id(card),
1662 dev_id(card),
1663 ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
1664 0);
1665
1666 if (result) {
1667 dev_dbg(&dev->core,
1668 "%s:set_interrupt_status_indicator failed: %s\n",
1669 __func__, ps3_result(result));
1670 result = -EIO;
1671 goto fail_status_indicator;
1672 }
1673
1674 result = ps3_sb_event_receive_port_setup(dev, PS3_BINDING_CPU_ANY,
1675 &card->irq);
1676
1677 if (result) {
1678 dev_info(ctodev(card),
1679 "%s:gelic_net_open_device failed (%d)\n",
1680 __func__, result);
1681 result = -EPERM;
1682 goto fail_alloc_irq;
1683 }
1684 result = request_irq(card->irq, gelic_card_interrupt,
1685 IRQF_DISABLED, netdev->name, card);
1686
1687 if (result) {
1688 dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
1689 __func__, result);
1690 goto fail_request_irq;
1691 }
1692
1693 /* setup card structure */
1694 card->irq_mask = GELIC_CARD_RXINT | GELIC_CARD_TXINT |
1695 GELIC_CARD_PORT_STATUS_CHANGED;
1696 card->rx_csum = GELIC_CARD_RX_CSUM_DEFAULT;
1697
1698
1699 if (gelic_card_init_chain(card, &card->tx_chain,
1700 card->descr, GELIC_NET_TX_DESCRIPTORS))
1701 goto fail_alloc_tx;
1702 if (gelic_card_init_chain(card, &card->rx_chain,
1703 card->descr + GELIC_NET_TX_DESCRIPTORS,
1704 GELIC_NET_RX_DESCRIPTORS))
1705 goto fail_alloc_rx;
1706
1707 /* head of chain */
1708 card->tx_top = card->tx_chain.head;
1709 card->rx_top = card->rx_chain.head;
1710 dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
1711 card->rx_top, card->tx_top, sizeof(struct gelic_descr),
1712 GELIC_NET_RX_DESCRIPTORS);
1713 /* allocate rx skbs */
1714 if (gelic_card_alloc_rx_skbs(card))
1715 goto fail_alloc_skbs;
1716
1717 spin_lock_init(&card->tx_lock);
1718 card->tx_dma_progress = 0;
1719
1720 /* setup net_device structure */
1721 netdev->irq = card->irq;
1722 SET_NETDEV_DEV(netdev, &card->dev->core);
1723 gelic_ether_setup_netdev_ops(netdev, &card->napi);
1724 result = gelic_net_setup_netdev(netdev, card);
1725 if (result) {
1726 dev_dbg(&dev->core, "%s: setup_netdev failed %d",
1727 __func__, result);
1728 goto fail_setup_netdev;
1729 }
1730
1731 #ifdef CONFIG_GELIC_WIRELESS
1732 if (gelic_wl_driver_probe(card)) {
1733 dev_dbg(&dev->core, "%s: WL init failed\n", __func__);
1734 goto fail_setup_netdev;
1735 }
1736 #endif
1737 pr_debug("%s: done\n", __func__);
1738 return 0;
1739
1740 fail_setup_netdev:
1741 fail_alloc_skbs:
1742 gelic_card_free_chain(card, card->rx_chain.head);
1743 fail_alloc_rx:
1744 gelic_card_free_chain(card, card->tx_chain.head);
1745 fail_alloc_tx:
1746 free_irq(card->irq, card);
1747 netdev->irq = NO_IRQ;
1748 fail_request_irq:
1749 ps3_sb_event_receive_port_destroy(dev, card->irq);
1750 fail_alloc_irq:
1751 lv1_net_set_interrupt_status_indicator(bus_id(card),
1752 bus_id(card),
1753 0, 0);
1754 fail_status_indicator:
1755 ps3_system_bus_set_drvdata(dev, NULL);
1756 kfree(netdev_card(netdev)->unalign);
1757 free_netdev(netdev);
1758 fail_alloc_card:
1759 ps3_dma_region_free(dev->d_region);
1760 fail_dma_region:
1761 ps3_close_hv_device(dev);
1762 fail_open:
1763 return result;
1764 }
1765
1766 /**
1767 * ps3_gelic_driver_remove - remove a device from the control of this driver
1768 */
1769
1770 static int ps3_gelic_driver_remove(struct ps3_system_bus_device *dev)
1771 {
1772 struct gelic_card *card = ps3_system_bus_get_drvdata(dev);
1773 struct net_device *netdev0;
1774 pr_debug("%s: called\n", __func__);
1775
1776 #ifdef CONFIG_GELIC_WIRELESS
1777 gelic_wl_driver_remove(card);
1778 #endif
1779 /* stop interrupt */
1780 gelic_card_set_irq_mask(card, 0);
1781
1782 /* turn off DMA, force end */
1783 gelic_card_disable_rxdmac(card);
1784 gelic_card_disable_txdmac(card);
1785
1786 /* release chains */
1787 gelic_card_release_tx_chain(card, 1);
1788 gelic_card_release_rx_chain(card);
1789
1790 gelic_card_free_chain(card, card->tx_top);
1791 gelic_card_free_chain(card, card->rx_top);
1792
1793 netdev0 = card->netdev[GELIC_PORT_ETHERNET];
1794 /* disconnect event port */
1795 free_irq(card->irq, card);
1796 netdev0->irq = NO_IRQ;
1797 ps3_sb_event_receive_port_destroy(card->dev, card->irq);
1798
1799 wait_event(card->waitq,
1800 atomic_read(&card->tx_timeout_task_counter) == 0);
1801
1802 lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
1803 0 , 0);
1804
1805 unregister_netdev(netdev0);
1806 kfree(netdev_card(netdev0)->unalign);
1807 free_netdev(netdev0);
1808
1809 ps3_system_bus_set_drvdata(dev, NULL);
1810
1811 ps3_dma_region_free(dev->d_region);
1812
1813 ps3_close_hv_device(dev);
1814
1815 pr_debug("%s: done\n", __func__);
1816 return 0;
1817 }
1818
1819 static struct ps3_system_bus_driver ps3_gelic_driver = {
1820 .match_id = PS3_MATCH_ID_GELIC,
1821 .probe = ps3_gelic_driver_probe,
1822 .remove = ps3_gelic_driver_remove,
1823 .shutdown = ps3_gelic_driver_remove,
1824 .core.name = "ps3_gelic_driver",
1825 .core.owner = THIS_MODULE,
1826 };
1827
1828 static int __init ps3_gelic_driver_init (void)
1829 {
1830 return firmware_has_feature(FW_FEATURE_PS3_LV1)
1831 ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1832 : -ENODEV;
1833 }
1834
1835 static void __exit ps3_gelic_driver_exit (void)
1836 {
1837 ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1838 }
1839
1840 module_init(ps3_gelic_driver_init);
1841 module_exit(ps3_gelic_driver_exit);
1842
1843 MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1844
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree