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Linux 3.11-rc3
[cris-mirror.git] / drivers / net / ethernet / toshiba / ps3_gelic_net.c
blobad32af67e618c05ee67ec0505c161ec0c2415d13
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
56 MODULE_AUTHOR("SCE Inc.");
57 MODULE_DESCRIPTION("Gelic Network driver");
58 MODULE_LICENSE("GPL");
59
60
61 /* set irq_mask */
62 int 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
74 static 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 }
79 static 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
85 static 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 static int gelic_card_set_link_mode(struct gelic_card *card, int mode)
106 {
107 int status;
108 u64 v1, v2;
109
110 status = lv1_net_control(bus_id(card), dev_id(card),
111 GELIC_LV1_SET_NEGOTIATION_MODE,
112 GELIC_LV1_PHY_ETHERNET_0, mode, 0, &v1, &v2);
113 if (status) {
114 pr_info("%s: failed setting negotiation mode %d\n", __func__,
115 status);
116 return -EBUSY;
117 }
118
119 card->link_mode = mode;
120 return 0;
121 }
122
123 /**
124 * gelic_card_disable_txdmac - disables the transmit DMA controller
125 * @card: card structure
126 *
127 * gelic_card_disable_txdmac terminates processing on the DMA controller by
128 * turing off DMA and issuing a force end
129 */
130 static void gelic_card_disable_txdmac(struct gelic_card *card)
131 {
132 int status;
133
134 /* this hvc blocks until the DMA in progress really stopped */
135 status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card));
136 if (status)
137 dev_err(ctodev(card),
138 "lv1_net_stop_tx_dma failed, status=%d\n", status);
139 }
140
141 /**
142 * gelic_card_enable_rxdmac - enables the receive DMA controller
143 * @card: card structure
144 *
145 * gelic_card_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
146 * in the GDADMACCNTR register
147 */
148 static void gelic_card_enable_rxdmac(struct gelic_card *card)
149 {
150 int status;
151
152 #ifdef DEBUG
153 if (gelic_descr_get_status(card->rx_chain.head) !=
154 GELIC_DESCR_DMA_CARDOWNED) {
155 printk(KERN_ERR "%s: status=%x\n", __func__,
156 be32_to_cpu(card->rx_chain.head->dmac_cmd_status));
157 printk(KERN_ERR "%s: nextphy=%x\n", __func__,
158 be32_to_cpu(card->rx_chain.head->next_descr_addr));
159 printk(KERN_ERR "%s: head=%p\n", __func__,
160 card->rx_chain.head);
161 }
162 #endif
163 status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
164 card->rx_chain.head->bus_addr, 0);
165 if (status)
166 dev_info(ctodev(card),
167 "lv1_net_start_rx_dma failed, status=%d\n", status);
168 }
169
170 /**
171 * gelic_card_disable_rxdmac - disables the receive DMA controller
172 * @card: card structure
173 *
174 * gelic_card_disable_rxdmac terminates processing on the DMA controller by
175 * turing off DMA and issuing a force end
176 */
177 static void gelic_card_disable_rxdmac(struct gelic_card *card)
178 {
179 int status;
180
181 /* this hvc blocks until the DMA in progress really stopped */
182 status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card));
183 if (status)
184 dev_err(ctodev(card),
185 "lv1_net_stop_rx_dma failed, %d\n", status);
186 }
187
188 /**
189 * gelic_descr_set_status -- sets the status of a descriptor
190 * @descr: descriptor to change
191 * @status: status to set in the descriptor
192 *
193 * changes the status to the specified value. Doesn't change other bits
194 * in the status
195 */
196 static void gelic_descr_set_status(struct gelic_descr *descr,
197 enum gelic_descr_dma_status status)
198 {
199 descr->dmac_cmd_status = cpu_to_be32(status |
200 (be32_to_cpu(descr->dmac_cmd_status) &
201 ~GELIC_DESCR_DMA_STAT_MASK));
202 /*
203 * dma_cmd_status field is used to indicate whether the descriptor
204 * is valid or not.
205 * Usually caller of this function wants to inform that to the
206 * hardware, so we assure here the hardware sees the change.
207 */
208 wmb();
209 }
210
211 /**
212 * gelic_card_reset_chain - reset status of a descriptor chain
213 * @card: card structure
214 * @chain: address of chain
215 * @start_descr: address of descriptor array
216 *
217 * Reset the status of dma descriptors to ready state
218 * and re-initialize the hardware chain for later use
219 */
220 static void gelic_card_reset_chain(struct gelic_card *card,
221 struct gelic_descr_chain *chain,
222 struct gelic_descr *start_descr)
223 {
224 struct gelic_descr *descr;
225
226 for (descr = start_descr; start_descr != descr->next; descr++) {
227 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
228 descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
229 }
230
231 chain->head = start_descr;
232 chain->tail = (descr - 1);
233
234 (descr - 1)->next_descr_addr = 0;
235 }
236
237 void gelic_card_up(struct gelic_card *card)
238 {
239 pr_debug("%s: called\n", __func__);
240 mutex_lock(&card->updown_lock);
241 if (atomic_inc_return(&card->users) == 1) {
242 pr_debug("%s: real do\n", __func__);
243 /* enable irq */
244 gelic_card_set_irq_mask(card, card->irq_mask);
245 /* start rx */
246 gelic_card_enable_rxdmac(card);
247
248 napi_enable(&card->napi);
249 }
250 mutex_unlock(&card->updown_lock);
251 pr_debug("%s: done\n", __func__);
252 }
253
254 void gelic_card_down(struct gelic_card *card)
255 {
256 u64 mask;
257 pr_debug("%s: called\n", __func__);
258 mutex_lock(&card->updown_lock);
259 if (atomic_dec_if_positive(&card->users) == 0) {
260 pr_debug("%s: real do\n", __func__);
261 napi_disable(&card->napi);
262 /*
263 * Disable irq. Wireless interrupts will
264 * be disabled later if any
265 */
266 mask = card->irq_mask & (GELIC_CARD_WLAN_EVENT_RECEIVED |
267 GELIC_CARD_WLAN_COMMAND_COMPLETED);
268 gelic_card_set_irq_mask(card, mask);
269 /* stop rx */
270 gelic_card_disable_rxdmac(card);
271 gelic_card_reset_chain(card, &card->rx_chain,
272 card->descr + GELIC_NET_TX_DESCRIPTORS);
273 /* stop tx */
274 gelic_card_disable_txdmac(card);
275 }
276 mutex_unlock(&card->updown_lock);
277 pr_debug("%s: done\n", __func__);
278 }
279
280 /**
281 * gelic_descr_get_status -- returns the status of a descriptor
282 * @descr: descriptor to look at
283 *
284 * returns the status as in the dmac_cmd_status field of the descriptor
285 */
286 static enum gelic_descr_dma_status
287 gelic_descr_get_status(struct gelic_descr *descr)
288 {
289 return be32_to_cpu(descr->dmac_cmd_status) & GELIC_DESCR_DMA_STAT_MASK;
290 }
291
292 /**
293 * gelic_card_free_chain - free descriptor chain
294 * @card: card structure
295 * @descr_in: address of desc
296 */
297 static 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 */
321 static 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
363 iommu_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 */
382 static 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 */
435 static 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 */
463 static 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;
478 rewind:
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 */
489 static 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 */
506 static 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
530 static 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 }
537 static 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 */
551 static 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 }
593 out:
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 */
606 void 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 */
666 int 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 */
688 static struct gelic_descr *
689 gelic_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 */
712 static 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
743 static 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 */
777 static 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 */
822 static 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 */
850 int 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 */
921 static 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 */
980 static 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);
1050 refill:
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 * decriptor 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 */
1099 static 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 * gelic_net_change_mtu - changes the MTU of an interface
1119 * @netdev: interface device structure
1120 * @new_mtu: new MTU value
1121 *
1122 * returns 0 on success, <0 on failure
1123 */
1124 int gelic_net_change_mtu(struct net_device *netdev, int new_mtu)
1125 {
1126 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1127 * and mtu is outbound only anyway */
1128 if ((new_mtu < GELIC_NET_MIN_MTU) ||
1129 (new_mtu > GELIC_NET_MAX_MTU)) {
1130 return -EINVAL;
1131 }
1132 netdev->mtu = new_mtu;
1133 return 0;
1134 }
1135
1136 /**
1137 * gelic_card_interrupt - event handler for gelic_net
1138 */
1139 static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
1140 {
1141 unsigned long flags;
1142 struct gelic_card *card = ptr;
1143 u64 status;
1144
1145 status = card->irq_status;
1146
1147 if (!status)
1148 return IRQ_NONE;
1149
1150 status &= card->irq_mask;
1151
1152 if (status & GELIC_CARD_RXINT) {
1153 gelic_card_rx_irq_off(card);
1154 napi_schedule(&card->napi);
1155 }
1156
1157 if (status & GELIC_CARD_TXINT) {
1158 spin_lock_irqsave(&card->tx_lock, flags);
1159 card->tx_dma_progress = 0;
1160 gelic_card_release_tx_chain(card, 0);
1161 /* kick outstanding tx descriptor if any */
1162 gelic_card_kick_txdma(card, card->tx_chain.tail);
1163 spin_unlock_irqrestore(&card->tx_lock, flags);
1164 }
1165
1166 /* ether port status changed */
1167 if (status & GELIC_CARD_PORT_STATUS_CHANGED)
1168 gelic_card_get_ether_port_status(card, 1);
1169
1170 #ifdef CONFIG_GELIC_WIRELESS
1171 if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
1172 GELIC_CARD_WLAN_COMMAND_COMPLETED))
1173 gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
1174 #endif
1175
1176 return IRQ_HANDLED;
1177 }
1178
1179 #ifdef CONFIG_NET_POLL_CONTROLLER
1180 /**
1181 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1182 * @netdev: interface device structure
1183 *
1184 * see Documentation/networking/netconsole.txt
1185 */
1186 void gelic_net_poll_controller(struct net_device *netdev)
1187 {
1188 struct gelic_card *card = netdev_card(netdev);
1189
1190 gelic_card_set_irq_mask(card, 0);
1191 gelic_card_interrupt(netdev->irq, netdev);
1192 gelic_card_set_irq_mask(card, card->irq_mask);
1193 }
1194 #endif /* CONFIG_NET_POLL_CONTROLLER */
1195
1196 /**
1197 * gelic_net_open - called upon ifconfig up
1198 * @netdev: interface device structure
1199 *
1200 * returns 0 on success, <0 on failure
1201 *
1202 * gelic_net_open allocates all the descriptors and memory needed for
1203 * operation, sets up multicast list and enables interrupts
1204 */
1205 int gelic_net_open(struct net_device *netdev)
1206 {
1207 struct gelic_card *card = netdev_card(netdev);
1208
1209 dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
1210
1211 gelic_card_up(card);
1212
1213 netif_start_queue(netdev);
1214 gelic_card_get_ether_port_status(card, 1);
1215
1216 dev_dbg(ctodev(card), " <- %s\n", __func__);
1217 return 0;
1218 }
1219
1220 void gelic_net_get_drvinfo(struct net_device *netdev,
1221 struct ethtool_drvinfo *info)
1222 {
1223 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1224 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1225 }
1226
1227 static int gelic_ether_get_settings(struct net_device *netdev,
1228 struct ethtool_cmd *cmd)
1229 {
1230 struct gelic_card *card = netdev_card(netdev);
1231
1232 gelic_card_get_ether_port_status(card, 0);
1233
1234 if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
1235 cmd->duplex = DUPLEX_FULL;
1236 else
1237 cmd->duplex = DUPLEX_HALF;
1238
1239 switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
1240 case GELIC_LV1_ETHER_SPEED_10:
1241 ethtool_cmd_speed_set(cmd, SPEED_10);
1242 break;
1243 case GELIC_LV1_ETHER_SPEED_100:
1244 ethtool_cmd_speed_set(cmd, SPEED_100);
1245 break;
1246 case GELIC_LV1_ETHER_SPEED_1000:
1247 ethtool_cmd_speed_set(cmd, SPEED_1000);
1248 break;
1249 default:
1250 pr_info("%s: speed unknown\n", __func__);
1251 ethtool_cmd_speed_set(cmd, SPEED_10);
1252 break;
1253 }
1254
1255 cmd->supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1256 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1257 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1258 SUPPORTED_1000baseT_Full;
1259 cmd->advertising = cmd->supported;
1260 if (card->link_mode & GELIC_LV1_ETHER_AUTO_NEG) {
1261 cmd->autoneg = AUTONEG_ENABLE;
1262 } else {
1263 cmd->autoneg = AUTONEG_DISABLE;
1264 cmd->advertising &= ~ADVERTISED_Autoneg;
1265 }
1266 cmd->port = PORT_TP;
1267
1268 return 0;
1269 }
1270
1271 static int gelic_ether_set_settings(struct net_device *netdev,
1272 struct ethtool_cmd *cmd)
1273 {
1274 struct gelic_card *card = netdev_card(netdev);
1275 u64 mode;
1276 int ret;
1277
1278 if (cmd->autoneg == AUTONEG_ENABLE) {
1279 mode = GELIC_LV1_ETHER_AUTO_NEG;
1280 } else {
1281 switch (cmd->speed) {
1282 case SPEED_10:
1283 mode = GELIC_LV1_ETHER_SPEED_10;
1284 break;
1285 case SPEED_100:
1286 mode = GELIC_LV1_ETHER_SPEED_100;
1287 break;
1288 case SPEED_1000:
1289 mode = GELIC_LV1_ETHER_SPEED_1000;
1290 break;
1291 default:
1292 return -EINVAL;
1293 }
1294 if (cmd->duplex == DUPLEX_FULL)
1295 mode |= GELIC_LV1_ETHER_FULL_DUPLEX;
1296 else if (cmd->speed == SPEED_1000) {
1297 pr_info("1000 half duplex is not supported.\n");
1298 return -EINVAL;
1299 }
1300 }
1301
1302 ret = gelic_card_set_link_mode(card, mode);
1303
1304 if (ret)
1305 return ret;
1306
1307 return 0;
1308 }
1309
1310 static void gelic_net_get_wol(struct net_device *netdev,
1311 struct ethtool_wolinfo *wol)
1312 {
1313 if (0 <= ps3_compare_firmware_version(2, 2, 0))
1314 wol->supported = WAKE_MAGIC;
1315 else
1316 wol->supported = 0;
1317
1318 wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
1319 memset(&wol->sopass, 0, sizeof(wol->sopass));
1320 }
1321 static int gelic_net_set_wol(struct net_device *netdev,
1322 struct ethtool_wolinfo *wol)
1323 {
1324 int status;
1325 struct gelic_card *card;
1326 u64 v1, v2;
1327
1328 if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
1329 !capable(CAP_NET_ADMIN))
1330 return -EPERM;
1331
1332 if (wol->wolopts & ~WAKE_MAGIC)
1333 return -EINVAL;
1334
1335 card = netdev_card(netdev);
1336 if (wol->wolopts & WAKE_MAGIC) {
1337 status = lv1_net_control(bus_id(card), dev_id(card),
1338 GELIC_LV1_SET_WOL,
1339 GELIC_LV1_WOL_MAGIC_PACKET,
1340 0, GELIC_LV1_WOL_MP_ENABLE,
1341 &v1, &v2);
1342 if (status) {
1343 pr_info("%s: enabling WOL failed %d\n", __func__,
1344 status);
1345 status = -EIO;
1346 goto done;
1347 }
1348 status = lv1_net_control(bus_id(card), dev_id(card),
1349 GELIC_LV1_SET_WOL,
1350 GELIC_LV1_WOL_ADD_MATCH_ADDR,
1351 0, GELIC_LV1_WOL_MATCH_ALL,
1352 &v1, &v2);
1353 if (!status)
1354 ps3_sys_manager_set_wol(1);
1355 else {
1356 pr_info("%s: enabling WOL filter failed %d\n",
1357 __func__, status);
1358 status = -EIO;
1359 }
1360 } else {
1361 status = lv1_net_control(bus_id(card), dev_id(card),
1362 GELIC_LV1_SET_WOL,
1363 GELIC_LV1_WOL_MAGIC_PACKET,
1364 0, GELIC_LV1_WOL_MP_DISABLE,
1365 &v1, &v2);
1366 if (status) {
1367 pr_info("%s: disabling WOL failed %d\n", __func__,
1368 status);
1369 status = -EIO;
1370 goto done;
1371 }
1372 status = lv1_net_control(bus_id(card), dev_id(card),
1373 GELIC_LV1_SET_WOL,
1374 GELIC_LV1_WOL_DELETE_MATCH_ADDR,
1375 0, GELIC_LV1_WOL_MATCH_ALL,
1376 &v1, &v2);
1377 if (!status)
1378 ps3_sys_manager_set_wol(0);
1379 else {
1380 pr_info("%s: removing WOL filter failed %d\n",
1381 __func__, status);
1382 status = -EIO;
1383 }
1384 }
1385 done:
1386 return status;
1387 }
1388
1389 static const struct ethtool_ops gelic_ether_ethtool_ops = {
1390 .get_drvinfo = gelic_net_get_drvinfo,
1391 .get_settings = gelic_ether_get_settings,
1392 .set_settings = gelic_ether_set_settings,
1393 .get_link = ethtool_op_get_link,
1394 .get_wol = gelic_net_get_wol,
1395 .set_wol = gelic_net_set_wol,
1396 };
1397
1398 /**
1399 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1400 * function (to be called not under interrupt status)
1401 * @work: work is context of tx timout task
1402 *
1403 * called as task when tx hangs, resets interface (if interface is up)
1404 */
1405 static void gelic_net_tx_timeout_task(struct work_struct *work)
1406 {
1407 struct gelic_card *card =
1408 container_of(work, struct gelic_card, tx_timeout_task);
1409 struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1410
1411 dev_info(ctodev(card), "%s:Timed out. Restarting...\n", __func__);
1412
1413 if (!(netdev->flags & IFF_UP))
1414 goto out;
1415
1416 netif_device_detach(netdev);
1417 gelic_net_stop(netdev);
1418
1419 gelic_net_open(netdev);
1420 netif_device_attach(netdev);
1421
1422 out:
1423 atomic_dec(&card->tx_timeout_task_counter);
1424 }
1425
1426 /**
1427 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1428 * @netdev: interface device structure
1429 *
1430 * called, if tx hangs. Schedules a task that resets the interface
1431 */
1432 void gelic_net_tx_timeout(struct net_device *netdev)
1433 {
1434 struct gelic_card *card;
1435
1436 card = netdev_card(netdev);
1437 atomic_inc(&card->tx_timeout_task_counter);
1438 if (netdev->flags & IFF_UP)
1439 schedule_work(&card->tx_timeout_task);
1440 else
1441 atomic_dec(&card->tx_timeout_task_counter);
1442 }
1443
1444 static const struct net_device_ops gelic_netdevice_ops = {
1445 .ndo_open = gelic_net_open,
1446 .ndo_stop = gelic_net_stop,
1447 .ndo_start_xmit = gelic_net_xmit,
1448 .ndo_set_rx_mode = gelic_net_set_multi,
1449 .ndo_change_mtu = gelic_net_change_mtu,
1450 .ndo_tx_timeout = gelic_net_tx_timeout,
1451 .ndo_set_mac_address = eth_mac_addr,
1452 .ndo_validate_addr = eth_validate_addr,
1453 #ifdef CONFIG_NET_POLL_CONTROLLER
1454 .ndo_poll_controller = gelic_net_poll_controller,
1455 #endif
1456 };
1457
1458 /**
1459 * gelic_ether_setup_netdev_ops - initialization of net_device operations
1460 * @netdev: net_device structure
1461 *
1462 * fills out function pointers in the net_device structure
1463 */
1464 static void gelic_ether_setup_netdev_ops(struct net_device *netdev,
1465 struct napi_struct *napi)
1466 {
1467 netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
1468 /* NAPI */
1469 netif_napi_add(netdev, napi,
1470 gelic_net_poll, GELIC_NET_NAPI_WEIGHT);
1471 netdev->ethtool_ops = &gelic_ether_ethtool_ops;
1472 netdev->netdev_ops = &gelic_netdevice_ops;
1473 }
1474
1475 /**
1476 * gelic_ether_setup_netdev - initialization of net_device
1477 * @netdev: net_device structure
1478 * @card: card structure
1479 *
1480 * Returns 0 on success or <0 on failure
1481 *
1482 * gelic_ether_setup_netdev initializes the net_device structure
1483 * and register it.
1484 **/
1485 int gelic_net_setup_netdev(struct net_device *netdev, struct gelic_card *card)
1486 {
1487 int status;
1488 u64 v1, v2;
1489
1490 netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1491
1492 netdev->features = NETIF_F_IP_CSUM;
1493 if (GELIC_CARD_RX_CSUM_DEFAULT)
1494 netdev->features |= NETIF_F_RXCSUM;
1495
1496 status = lv1_net_control(bus_id(card), dev_id(card),
1497 GELIC_LV1_GET_MAC_ADDRESS,
1498 0, 0, 0, &v1, &v2);
1499 v1 <<= 16;
1500 if (status || !is_valid_ether_addr((u8 *)&v1)) {
1501 dev_info(ctodev(card),
1502 "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
1503 __func__, status);
1504 return -EINVAL;
1505 }
1506 memcpy(netdev->dev_addr, &v1, ETH_ALEN);
1507
1508 if (card->vlan_required) {
1509 netdev->hard_header_len += VLAN_HLEN;
1510 /*
1511 * As vlan is internally used,
1512 * we can not receive vlan packets
1513 */
1514 netdev->features |= NETIF_F_VLAN_CHALLENGED;
1515 }
1516
1517 status = register_netdev(netdev);
1518 if (status) {
1519 dev_err(ctodev(card), "%s:Couldn't register %s %d\n",
1520 __func__, netdev->name, status);
1521 return status;
1522 }
1523 dev_info(ctodev(card), "%s: MAC addr %pM\n",
1524 netdev->name, netdev->dev_addr);
1525
1526 return 0;
1527 }
1528
1529 /**
1530 * gelic_alloc_card_net - allocates net_device and card structure
1531 *
1532 * returns the card structure or NULL in case of errors
1533 *
1534 * the card and net_device structures are linked to each other
1535 */
1536 #define GELIC_ALIGN (32)
1537 static struct gelic_card *gelic_alloc_card_net(struct net_device **netdev)
1538 {
1539 struct gelic_card *card;
1540 struct gelic_port *port;
1541 void *p;
1542 size_t alloc_size;
1543 /*
1544 * gelic requires dma descriptor is 32 bytes aligned and
1545 * the hypervisor requires irq_status is 8 bytes aligned.
1546 */
1547 BUILD_BUG_ON(offsetof(struct gelic_card, irq_status) % 8);
1548 BUILD_BUG_ON(offsetof(struct gelic_card, descr) % 32);
1549 alloc_size =
1550 sizeof(struct gelic_card) +
1551 sizeof(struct gelic_descr) * GELIC_NET_RX_DESCRIPTORS +
1552 sizeof(struct gelic_descr) * GELIC_NET_TX_DESCRIPTORS +
1553 GELIC_ALIGN - 1;
1554
1555 p = kzalloc(alloc_size, GFP_KERNEL);
1556 if (!p)
1557 return NULL;
1558 card = PTR_ALIGN(p, GELIC_ALIGN);
1559 card->unalign = p;
1560
1561 /*
1562 * alloc netdev
1563 */
1564 *netdev = alloc_etherdev(sizeof(struct gelic_port));
1565 if (!netdev) {
1566 kfree(card->unalign);
1567 return NULL;
1568 }
1569 port = netdev_priv(*netdev);
1570
1571 /* gelic_port */
1572 port->netdev = *netdev;
1573 port->card = card;
1574 port->type = GELIC_PORT_ETHERNET_0;
1575
1576 /* gelic_card */
1577 card->netdev[GELIC_PORT_ETHERNET_0] = *netdev;
1578
1579 INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
1580 init_waitqueue_head(&card->waitq);
1581 atomic_set(&card->tx_timeout_task_counter, 0);
1582 mutex_init(&card->updown_lock);
1583 atomic_set(&card->users, 0);
1584
1585 return card;
1586 }
1587
1588 static void gelic_card_get_vlan_info(struct gelic_card *card)
1589 {
1590 u64 v1, v2;
1591 int status;
1592 unsigned int i;
1593 struct {
1594 int tx;
1595 int rx;
1596 } vlan_id_ix[2] = {
1597 [GELIC_PORT_ETHERNET_0] = {
1598 .tx = GELIC_LV1_VLAN_TX_ETHERNET_0,
1599 .rx = GELIC_LV1_VLAN_RX_ETHERNET_0
1600 },
1601 [GELIC_PORT_WIRELESS] = {
1602 .tx = GELIC_LV1_VLAN_TX_WIRELESS,
1603 .rx = GELIC_LV1_VLAN_RX_WIRELESS
1604 }
1605 };
1606
1607 for (i = 0; i < ARRAY_SIZE(vlan_id_ix); i++) {
1608 /* tx tag */
1609 status = lv1_net_control(bus_id(card), dev_id(card),
1610 GELIC_LV1_GET_VLAN_ID,
1611 vlan_id_ix[i].tx,
1612 0, 0, &v1, &v2);
1613 if (status || !v1) {
1614 if (status != LV1_NO_ENTRY)
1615 dev_dbg(ctodev(card),
1616 "get vlan id for tx(%d) failed(%d)\n",
1617 vlan_id_ix[i].tx, status);
1618 card->vlan[i].tx = 0;
1619 card->vlan[i].rx = 0;
1620 continue;
1621 }
1622 card->vlan[i].tx = (u16)v1;
1623
1624 /* rx tag */
1625 status = lv1_net_control(bus_id(card), dev_id(card),
1626 GELIC_LV1_GET_VLAN_ID,
1627 vlan_id_ix[i].rx,
1628 0, 0, &v1, &v2);
1629 if (status || !v1) {
1630 if (status != LV1_NO_ENTRY)
1631 dev_info(ctodev(card),
1632 "get vlan id for rx(%d) failed(%d)\n",
1633 vlan_id_ix[i].rx, status);
1634 card->vlan[i].tx = 0;
1635 card->vlan[i].rx = 0;
1636 continue;
1637 }
1638 card->vlan[i].rx = (u16)v1;
1639
1640 dev_dbg(ctodev(card), "vlan_id[%d] tx=%02x rx=%02x\n",
1641 i, card->vlan[i].tx, card->vlan[i].rx);
1642 }
1643
1644 if (card->vlan[GELIC_PORT_ETHERNET_0].tx) {
1645 BUG_ON(!card->vlan[GELIC_PORT_WIRELESS].tx);
1646 card->vlan_required = 1;
1647 } else
1648 card->vlan_required = 0;
1649
1650 /* check wirelss capable firmware */
1651 if (ps3_compare_firmware_version(1, 6, 0) < 0) {
1652 card->vlan[GELIC_PORT_WIRELESS].tx = 0;
1653 card->vlan[GELIC_PORT_WIRELESS].rx = 0;
1654 }
1655
1656 dev_info(ctodev(card), "internal vlan %s\n",
1657 card->vlan_required? "enabled" : "disabled");
1658 }
1659 /**
1660 * ps3_gelic_driver_probe - add a device to the control of this driver
1661 */
1662 static int ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
1663 {
1664 struct gelic_card *card;
1665 struct net_device *netdev;
1666 int result;
1667
1668 pr_debug("%s: called\n", __func__);
1669
1670 udbg_shutdown_ps3gelic();
1671
1672 result = ps3_open_hv_device(dev);
1673
1674 if (result) {
1675 dev_dbg(&dev->core, "%s:ps3_open_hv_device failed\n",
1676 __func__);
1677 goto fail_open;
1678 }
1679
1680 result = ps3_dma_region_create(dev->d_region);
1681
1682 if (result) {
1683 dev_dbg(&dev->core, "%s:ps3_dma_region_create failed(%d)\n",
1684 __func__, result);
1685 BUG_ON("check region type");
1686 goto fail_dma_region;
1687 }
1688
1689 /* alloc card/netdevice */
1690 card = gelic_alloc_card_net(&netdev);
1691 if (!card) {
1692 dev_info(&dev->core, "%s:gelic_net_alloc_card failed\n",
1693 __func__);
1694 result = -ENOMEM;
1695 goto fail_alloc_card;
1696 }
1697 ps3_system_bus_set_drvdata(dev, card);
1698 card->dev = dev;
1699
1700 /* get internal vlan info */
1701 gelic_card_get_vlan_info(card);
1702
1703 card->link_mode = GELIC_LV1_ETHER_AUTO_NEG;
1704
1705 /* setup interrupt */
1706 result = lv1_net_set_interrupt_status_indicator(bus_id(card),
1707 dev_id(card),
1708 ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
1709 0);
1710
1711 if (result) {
1712 dev_dbg(&dev->core,
1713 "%s:set_interrupt_status_indicator failed: %s\n",
1714 __func__, ps3_result(result));
1715 result = -EIO;
1716 goto fail_status_indicator;
1717 }
1718
1719 result = ps3_sb_event_receive_port_setup(dev, PS3_BINDING_CPU_ANY,
1720 &card->irq);
1721
1722 if (result) {
1723 dev_info(ctodev(card),
1724 "%s:gelic_net_open_device failed (%d)\n",
1725 __func__, result);
1726 result = -EPERM;
1727 goto fail_alloc_irq;
1728 }
1729 result = request_irq(card->irq, gelic_card_interrupt,
1730 IRQF_DISABLED, netdev->name, card);
1731
1732 if (result) {
1733 dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
1734 __func__, result);
1735 goto fail_request_irq;
1736 }
1737
1738 /* setup card structure */
1739 card->irq_mask = GELIC_CARD_RXINT | GELIC_CARD_TXINT |
1740 GELIC_CARD_PORT_STATUS_CHANGED;
1741
1742
1743 if (gelic_card_init_chain(card, &card->tx_chain,
1744 card->descr, GELIC_NET_TX_DESCRIPTORS))
1745 goto fail_alloc_tx;
1746 if (gelic_card_init_chain(card, &card->rx_chain,
1747 card->descr + GELIC_NET_TX_DESCRIPTORS,
1748 GELIC_NET_RX_DESCRIPTORS))
1749 goto fail_alloc_rx;
1750
1751 /* head of chain */
1752 card->tx_top = card->tx_chain.head;
1753 card->rx_top = card->rx_chain.head;
1754 dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
1755 card->rx_top, card->tx_top, sizeof(struct gelic_descr),
1756 GELIC_NET_RX_DESCRIPTORS);
1757 /* allocate rx skbs */
1758 if (gelic_card_alloc_rx_skbs(card))
1759 goto fail_alloc_skbs;
1760
1761 spin_lock_init(&card->tx_lock);
1762 card->tx_dma_progress = 0;
1763
1764 /* setup net_device structure */
1765 netdev->irq = card->irq;
1766 SET_NETDEV_DEV(netdev, &card->dev->core);
1767 gelic_ether_setup_netdev_ops(netdev, &card->napi);
1768 result = gelic_net_setup_netdev(netdev, card);
1769 if (result) {
1770 dev_dbg(&dev->core, "%s: setup_netdev failed %d",
1771 __func__, result);
1772 goto fail_setup_netdev;
1773 }
1774
1775 #ifdef CONFIG_GELIC_WIRELESS
1776 if (gelic_wl_driver_probe(card)) {
1777 dev_dbg(&dev->core, "%s: WL init failed\n", __func__);
1778 goto fail_setup_netdev;
1779 }
1780 #endif
1781 pr_debug("%s: done\n", __func__);
1782 return 0;
1783
1784 fail_setup_netdev:
1785 fail_alloc_skbs:
1786 gelic_card_free_chain(card, card->rx_chain.head);
1787 fail_alloc_rx:
1788 gelic_card_free_chain(card, card->tx_chain.head);
1789 fail_alloc_tx:
1790 free_irq(card->irq, card);
1791 netdev->irq = NO_IRQ;
1792 fail_request_irq:
1793 ps3_sb_event_receive_port_destroy(dev, card->irq);
1794 fail_alloc_irq:
1795 lv1_net_set_interrupt_status_indicator(bus_id(card),
1796 bus_id(card),
1797 0, 0);
1798 fail_status_indicator:
1799 ps3_system_bus_set_drvdata(dev, NULL);
1800 kfree(netdev_card(netdev)->unalign);
1801 free_netdev(netdev);
1802 fail_alloc_card:
1803 ps3_dma_region_free(dev->d_region);
1804 fail_dma_region:
1805 ps3_close_hv_device(dev);
1806 fail_open:
1807 return result;
1808 }
1809
1810 /**
1811 * ps3_gelic_driver_remove - remove a device from the control of this driver
1812 */
1813
1814 static int ps3_gelic_driver_remove(struct ps3_system_bus_device *dev)
1815 {
1816 struct gelic_card *card = ps3_system_bus_get_drvdata(dev);
1817 struct net_device *netdev0;
1818 pr_debug("%s: called\n", __func__);
1819
1820 /* set auto-negotiation */
1821 gelic_card_set_link_mode(card, GELIC_LV1_ETHER_AUTO_NEG);
1822
1823 #ifdef CONFIG_GELIC_WIRELESS
1824 gelic_wl_driver_remove(card);
1825 #endif
1826 /* stop interrupt */
1827 gelic_card_set_irq_mask(card, 0);
1828
1829 /* turn off DMA, force end */
1830 gelic_card_disable_rxdmac(card);
1831 gelic_card_disable_txdmac(card);
1832
1833 /* release chains */
1834 gelic_card_release_tx_chain(card, 1);
1835 gelic_card_release_rx_chain(card);
1836
1837 gelic_card_free_chain(card, card->tx_top);
1838 gelic_card_free_chain(card, card->rx_top);
1839
1840 netdev0 = card->netdev[GELIC_PORT_ETHERNET_0];
1841 /* disconnect event port */
1842 free_irq(card->irq, card);
1843 netdev0->irq = NO_IRQ;
1844 ps3_sb_event_receive_port_destroy(card->dev, card->irq);
1845
1846 wait_event(card->waitq,
1847 atomic_read(&card->tx_timeout_task_counter) == 0);
1848
1849 lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
1850 0 , 0);
1851
1852 unregister_netdev(netdev0);
1853 kfree(netdev_card(netdev0)->unalign);
1854 free_netdev(netdev0);
1855
1856 ps3_system_bus_set_drvdata(dev, NULL);
1857
1858 ps3_dma_region_free(dev->d_region);
1859
1860 ps3_close_hv_device(dev);
1861
1862 pr_debug("%s: done\n", __func__);
1863 return 0;
1864 }
1865
1866 static struct ps3_system_bus_driver ps3_gelic_driver = {
1867 .match_id = PS3_MATCH_ID_GELIC,
1868 .probe = ps3_gelic_driver_probe,
1869 .remove = ps3_gelic_driver_remove,
1870 .shutdown = ps3_gelic_driver_remove,
1871 .core.name = "ps3_gelic_driver",
1872 .core.owner = THIS_MODULE,
1873 };
1874
1875 static int __init ps3_gelic_driver_init (void)
1876 {
1877 return firmware_has_feature(FW_FEATURE_PS3_LV1)
1878 ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1879 : -ENODEV;
1880 }
1881
1882 static void __exit ps3_gelic_driver_exit (void)
1883 {
1884 ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1885 }
1886
1887 module_init(ps3_gelic_driver_init);
1888 module_exit(ps3_gelic_driver_exit);
1889
1890 MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1891
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