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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / toshiba / ps3_gelic_net.c
blob070dd6fa9401a1a79ad6ed62d316d77141f5b62d
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * PS3 gelic network driver.
4 *
5 * Copyright (C) 2007 Sony Computer Entertainment Inc.
6 * Copyright 2006, 2007 Sony Corporation
7 *
8 * This file is based on: spider_net.c
9 *
10 * (C) Copyright IBM Corp. 2005
11 *
12 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
13 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
14 */
15
16 #undef DEBUG
17
18 #include <linux/interrupt.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/slab.h>
22
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_vlan.h>
26
27 #include <linux/in.h>
28 #include <linux/ip.h>
29 #include <linux/tcp.h>
30
31 #include <linux/dma-mapping.h>
32 #include <net/checksum.h>
33 #include <asm/firmware.h>
34 #include <asm/ps3.h>
35 #include <asm/lv1call.h>
36
37 #include "ps3_gelic_net.h"
38 #include "ps3_gelic_wireless.h"
39
40 #define DRV_NAME "Gelic Network Driver"
41 #define DRV_VERSION "2.0"
42
43 MODULE_AUTHOR("SCE Inc.");
44 MODULE_DESCRIPTION("Gelic Network driver");
45 MODULE_LICENSE("GPL");
46
47
48 /* set irq_mask */
49 int gelic_card_set_irq_mask(struct gelic_card *card, u64 mask)
50 {
51 int status;
52
53 status = lv1_net_set_interrupt_mask(bus_id(card), dev_id(card),
54 mask, 0);
55 if (status)
56 dev_info(ctodev(card),
57 "%s failed %d\n", __func__, status);
58 return status;
59 }
60
61 static void gelic_card_rx_irq_on(struct gelic_card *card)
62 {
63 card->irq_mask |= GELIC_CARD_RXINT;
64 gelic_card_set_irq_mask(card, card->irq_mask);
65 }
66 static void gelic_card_rx_irq_off(struct gelic_card *card)
67 {
68 card->irq_mask &= ~GELIC_CARD_RXINT;
69 gelic_card_set_irq_mask(card, card->irq_mask);
70 }
71
72 static void gelic_card_get_ether_port_status(struct gelic_card *card,
73 int inform)
74 {
75 u64 v2;
76 struct net_device *ether_netdev;
77
78 lv1_net_control(bus_id(card), dev_id(card),
79 GELIC_LV1_GET_ETH_PORT_STATUS,
80 GELIC_LV1_VLAN_TX_ETHERNET_0, 0, 0,
81 &card->ether_port_status, &v2);
82
83 if (inform) {
84 ether_netdev = card->netdev[GELIC_PORT_ETHERNET_0];
85 if (card->ether_port_status & GELIC_LV1_ETHER_LINK_UP)
86 netif_carrier_on(ether_netdev);
87 else
88 netif_carrier_off(ether_netdev);
89 }
90 }
91
92 /**
93 * gelic_descr_get_status -- returns the status of a descriptor
94 * @descr: descriptor to look at
95 *
96 * returns the status as in the dmac_cmd_status field of the descriptor
97 */
98 static enum gelic_descr_dma_status
99 gelic_descr_get_status(struct gelic_descr *descr)
100 {
101 return be32_to_cpu(descr->dmac_cmd_status) & GELIC_DESCR_DMA_STAT_MASK;
102 }
103
104 static int gelic_card_set_link_mode(struct gelic_card *card, int mode)
105 {
106 int status;
107 u64 v1, v2;
108
109 status = lv1_net_control(bus_id(card), dev_id(card),
110 GELIC_LV1_SET_NEGOTIATION_MODE,
111 GELIC_LV1_PHY_ETHERNET_0, mode, 0, &v1, &v2);
112 if (status) {
113 pr_info("%s: failed setting negotiation mode %d\n", __func__,
114 status);
115 return -EBUSY;
116 }
117
118 card->link_mode = mode;
119 return 0;
120 }
121
122 /**
123 * gelic_card_disable_txdmac - disables the transmit DMA controller
124 * @card: card structure
125 *
126 * gelic_card_disable_txdmac terminates processing on the DMA controller by
127 * turing off DMA and issuing a force end
128 */
129 static void gelic_card_disable_txdmac(struct gelic_card *card)
130 {
131 int status;
132
133 /* this hvc blocks until the DMA in progress really stopped */
134 status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card));
135 if (status)
136 dev_err(ctodev(card),
137 "lv1_net_stop_tx_dma failed, status=%d\n", status);
138 }
139
140 /**
141 * gelic_card_enable_rxdmac - enables the receive DMA controller
142 * @card: card structure
143 *
144 * gelic_card_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
145 * in the GDADMACCNTR register
146 */
147 static void gelic_card_enable_rxdmac(struct gelic_card *card)
148 {
149 int status;
150
151 #ifdef DEBUG
152 if (gelic_descr_get_status(card->rx_chain.head) !=
153 GELIC_DESCR_DMA_CARDOWNED) {
154 printk(KERN_ERR "%s: status=%x\n", __func__,
155 be32_to_cpu(card->rx_chain.head->dmac_cmd_status));
156 printk(KERN_ERR "%s: nextphy=%x\n", __func__,
157 be32_to_cpu(card->rx_chain.head->next_descr_addr));
158 printk(KERN_ERR "%s: head=%p\n", __func__,
159 card->rx_chain.head);
160 }
161 #endif
162 status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
163 card->rx_chain.head->bus_addr, 0);
164 if (status)
165 dev_info(ctodev(card),
166 "lv1_net_start_rx_dma failed, status=%d\n", status);
167 }
168
169 /**
170 * gelic_card_disable_rxdmac - disables the receive DMA controller
171 * @card: card structure
172 *
173 * gelic_card_disable_rxdmac terminates processing on the DMA controller by
174 * turing off DMA and issuing a force end
175 */
176 static void gelic_card_disable_rxdmac(struct gelic_card *card)
177 {
178 int status;
179
180 /* this hvc blocks until the DMA in progress really stopped */
181 status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card));
182 if (status)
183 dev_err(ctodev(card),
184 "lv1_net_stop_rx_dma failed, %d\n", status);
185 }
186
187 /**
188 * gelic_descr_set_status -- sets the status of a descriptor
189 * @descr: descriptor to change
190 * @status: status to set in the descriptor
191 *
192 * changes the status to the specified value. Doesn't change other bits
193 * in the status
194 */
195 static void gelic_descr_set_status(struct gelic_descr *descr,
196 enum gelic_descr_dma_status status)
197 {
198 descr->dmac_cmd_status = cpu_to_be32(status |
199 (be32_to_cpu(descr->dmac_cmd_status) &
200 ~GELIC_DESCR_DMA_STAT_MASK));
201 /*
202 * dma_cmd_status field is used to indicate whether the descriptor
203 * is valid or not.
204 * Usually caller of this function wants to inform that to the
205 * hardware, so we assure here the hardware sees the change.
206 */
207 wmb();
208 }
209
210 /**
211 * gelic_card_reset_chain - reset status of a descriptor chain
212 * @card: card structure
213 * @chain: address of chain
214 * @start_descr: address of descriptor array
215 *
216 * Reset the status of dma descriptors to ready state
217 * and re-initialize the hardware chain for later use
218 */
219 static void gelic_card_reset_chain(struct gelic_card *card,
220 struct gelic_descr_chain *chain,
221 struct gelic_descr *start_descr)
222 {
223 struct gelic_descr *descr;
224
225 for (descr = start_descr; start_descr != descr->next; descr++) {
226 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
227 descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
228 }
229
230 chain->head = start_descr;
231 chain->tail = (descr - 1);
232
233 (descr - 1)->next_descr_addr = 0;
234 }
235
236 void gelic_card_up(struct gelic_card *card)
237 {
238 pr_debug("%s: called\n", __func__);
239 mutex_lock(&card->updown_lock);
240 if (atomic_inc_return(&card->users) == 1) {
241 pr_debug("%s: real do\n", __func__);
242 /* enable irq */
243 gelic_card_set_irq_mask(card, card->irq_mask);
244 /* start rx */
245 gelic_card_enable_rxdmac(card);
246
247 napi_enable(&card->napi);
248 }
249 mutex_unlock(&card->updown_lock);
250 pr_debug("%s: done\n", __func__);
251 }
252
253 void gelic_card_down(struct gelic_card *card)
254 {
255 u64 mask;
256 pr_debug("%s: called\n", __func__);
257 mutex_lock(&card->updown_lock);
258 if (atomic_dec_if_positive(&card->users) == 0) {
259 pr_debug("%s: real do\n", __func__);
260 napi_disable(&card->napi);
261 /*
262 * Disable irq. Wireless interrupts will
263 * be disabled later if any
264 */
265 mask = card->irq_mask & (GELIC_CARD_WLAN_EVENT_RECEIVED |
266 GELIC_CARD_WLAN_COMMAND_COMPLETED);
267 gelic_card_set_irq_mask(card, mask);
268 /* stop rx */
269 gelic_card_disable_rxdmac(card);
270 gelic_card_reset_chain(card, &card->rx_chain,
271 card->descr + GELIC_NET_TX_DESCRIPTORS);
272 /* stop tx */
273 gelic_card_disable_txdmac(card);
274 }
275 mutex_unlock(&card->updown_lock);
276 pr_debug("%s: done\n", __func__);
277 }
278
279 /**
280 * gelic_card_free_chain - free descriptor chain
281 * @card: card structure
282 * @descr_in: address of desc
283 */
284 static void gelic_card_free_chain(struct gelic_card *card,
285 struct gelic_descr *descr_in)
286 {
287 struct gelic_descr *descr;
288
289 for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) {
290 dma_unmap_single(ctodev(card), descr->bus_addr,
291 GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
292 descr->bus_addr = 0;
293 }
294 }
295
296 /**
297 * gelic_card_init_chain - links descriptor chain
298 * @card: card structure
299 * @chain: address of chain
300 * @start_descr: address of descriptor array
301 * @no: number of descriptors
302 *
303 * we manage a circular list that mirrors the hardware structure,
304 * except that the hardware uses bus addresses.
305 *
306 * returns 0 on success, <0 on failure
307 */
308 static int gelic_card_init_chain(struct gelic_card *card,
309 struct gelic_descr_chain *chain,
310 struct gelic_descr *start_descr, int no)
311 {
312 int i;
313 struct gelic_descr *descr;
314
315 descr = start_descr;
316 memset(descr, 0, sizeof(*descr) * no);
317
318 /* set up the hardware pointers in each descriptor */
319 for (i = 0; i < no; i++, descr++) {
320 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
321 descr->bus_addr =
322 dma_map_single(ctodev(card), descr,
323 GELIC_DESCR_SIZE,
324 DMA_BIDIRECTIONAL);
325
326 if (!descr->bus_addr)
327 goto iommu_error;
328
329 descr->next = descr + 1;
330 descr->prev = descr - 1;
331 }
332 /* make them as ring */
333 (descr - 1)->next = start_descr;
334 start_descr->prev = (descr - 1);
335
336 /* chain bus addr of hw descriptor */
337 descr = start_descr;
338 for (i = 0; i < no; i++, descr++) {
339 descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
340 }
341
342 chain->head = start_descr;
343 chain->tail = start_descr;
344
345 /* do not chain last hw descriptor */
346 (descr - 1)->next_descr_addr = 0;
347
348 return 0;
349
350 iommu_error:
351 for (i--, descr--; 0 <= i; i--, descr--)
352 if (descr->bus_addr)
353 dma_unmap_single(ctodev(card), descr->bus_addr,
354 GELIC_DESCR_SIZE,
355 DMA_BIDIRECTIONAL);
356 return -ENOMEM;
357 }
358
359 /**
360 * gelic_descr_prepare_rx - reinitializes a rx descriptor
361 * @card: card structure
362 * @descr: descriptor to re-init
363 *
364 * return 0 on success, <0 on failure
365 *
366 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
367 * Activate the descriptor state-wise
368 */
369 static int gelic_descr_prepare_rx(struct gelic_card *card,
370 struct gelic_descr *descr)
371 {
372 int offset;
373 unsigned int bufsize;
374
375 if (gelic_descr_get_status(descr) != GELIC_DESCR_DMA_NOT_IN_USE)
376 dev_info(ctodev(card), "%s: ERROR status\n", __func__);
377 /* we need to round up the buffer size to a multiple of 128 */
378 bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN);
379
380 /* and we need to have it 128 byte aligned, therefore we allocate a
381 * bit more */
382 descr->skb = dev_alloc_skb(bufsize + GELIC_NET_RXBUF_ALIGN - 1);
383 if (!descr->skb) {
384 descr->buf_addr = 0; /* tell DMAC don't touch memory */
385 dev_info(ctodev(card),
386 "%s:allocate skb failed !!\n", __func__);
387 return -ENOMEM;
388 }
389 descr->buf_size = cpu_to_be32(bufsize);
390 descr->dmac_cmd_status = 0;
391 descr->result_size = 0;
392 descr->valid_size = 0;
393 descr->data_error = 0;
394
395 offset = ((unsigned long)descr->skb->data) &
396 (GELIC_NET_RXBUF_ALIGN - 1);
397 if (offset)
398 skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
399 /* io-mmu-map the skb */
400 descr->buf_addr = cpu_to_be32(dma_map_single(ctodev(card),
401 descr->skb->data,
402 GELIC_NET_MAX_MTU,
403 DMA_FROM_DEVICE));
404 if (!descr->buf_addr) {
405 dev_kfree_skb_any(descr->skb);
406 descr->skb = NULL;
407 dev_info(ctodev(card),
408 "%s:Could not iommu-map rx buffer\n", __func__);
409 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
410 return -ENOMEM;
411 } else {
412 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
413 return 0;
414 }
415 }
416
417 /**
418 * gelic_card_release_rx_chain - free all skb of rx descr
419 * @card: card structure
420 *
421 */
422 static void gelic_card_release_rx_chain(struct gelic_card *card)
423 {
424 struct gelic_descr *descr = card->rx_chain.head;
425
426 do {
427 if (descr->skb) {
428 dma_unmap_single(ctodev(card),
429 be32_to_cpu(descr->buf_addr),
430 descr->skb->len,
431 DMA_FROM_DEVICE);
432 descr->buf_addr = 0;
433 dev_kfree_skb_any(descr->skb);
434 descr->skb = NULL;
435 gelic_descr_set_status(descr,
436 GELIC_DESCR_DMA_NOT_IN_USE);
437 }
438 descr = descr->next;
439 } while (descr != card->rx_chain.head);
440 }
441
442 /**
443 * gelic_card_fill_rx_chain - fills descriptors/skbs in the rx chains
444 * @card: card structure
445 *
446 * fills all descriptors in the rx chain: allocates skbs
447 * and iommu-maps them.
448 * returns 0 on success, < 0 on failure
449 */
450 static int gelic_card_fill_rx_chain(struct gelic_card *card)
451 {
452 struct gelic_descr *descr = card->rx_chain.head;
453 int ret;
454
455 do {
456 if (!descr->skb) {
457 ret = gelic_descr_prepare_rx(card, descr);
458 if (ret)
459 goto rewind;
460 }
461 descr = descr->next;
462 } while (descr != card->rx_chain.head);
463
464 return 0;
465 rewind:
466 gelic_card_release_rx_chain(card);
467 return ret;
468 }
469
470 /**
471 * gelic_card_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
472 * @card: card structure
473 *
474 * returns 0 on success, < 0 on failure
475 */
476 static int gelic_card_alloc_rx_skbs(struct gelic_card *card)
477 {
478 struct gelic_descr_chain *chain;
479 int ret;
480 chain = &card->rx_chain;
481 ret = gelic_card_fill_rx_chain(card);
482 chain->tail = card->rx_top->prev; /* point to the last */
483 return ret;
484 }
485
486 /**
487 * gelic_descr_release_tx - processes a used tx descriptor
488 * @card: card structure
489 * @descr: descriptor to release
490 *
491 * releases a used tx descriptor (unmapping, freeing of skb)
492 */
493 static void gelic_descr_release_tx(struct gelic_card *card,
494 struct gelic_descr *descr)
495 {
496 struct sk_buff *skb = descr->skb;
497
498 BUG_ON(!(be32_to_cpu(descr->data_status) & GELIC_DESCR_TX_TAIL));
499
500 dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr), skb->len,
501 DMA_TO_DEVICE);
502 dev_kfree_skb_any(skb);
503
504 descr->buf_addr = 0;
505 descr->buf_size = 0;
506 descr->next_descr_addr = 0;
507 descr->result_size = 0;
508 descr->valid_size = 0;
509 descr->data_status = 0;
510 descr->data_error = 0;
511 descr->skb = NULL;
512
513 /* set descr status */
514 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
515 }
516
517 static void gelic_card_stop_queues(struct gelic_card *card)
518 {
519 netif_stop_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
520
521 if (card->netdev[GELIC_PORT_WIRELESS])
522 netif_stop_queue(card->netdev[GELIC_PORT_WIRELESS]);
523 }
524 static void gelic_card_wake_queues(struct gelic_card *card)
525 {
526 netif_wake_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
527
528 if (card->netdev[GELIC_PORT_WIRELESS])
529 netif_wake_queue(card->netdev[GELIC_PORT_WIRELESS]);
530 }
531 /**
532 * gelic_card_release_tx_chain - processes sent tx descriptors
533 * @card: adapter structure
534 * @stop: net_stop sequence
535 *
536 * releases the tx descriptors that gelic has finished with
537 */
538 static void gelic_card_release_tx_chain(struct gelic_card *card, int stop)
539 {
540 struct gelic_descr_chain *tx_chain;
541 enum gelic_descr_dma_status status;
542 struct net_device *netdev;
543 int release = 0;
544
545 for (tx_chain = &card->tx_chain;
546 tx_chain->head != tx_chain->tail && tx_chain->tail;
547 tx_chain->tail = tx_chain->tail->next) {
548 status = gelic_descr_get_status(tx_chain->tail);
549 netdev = tx_chain->tail->skb->dev;
550 switch (status) {
551 case GELIC_DESCR_DMA_RESPONSE_ERROR:
552 case GELIC_DESCR_DMA_PROTECTION_ERROR:
553 case GELIC_DESCR_DMA_FORCE_END:
554 if (printk_ratelimit())
555 dev_info(ctodev(card),
556 "%s: forcing end of tx descriptor " \
557 "with status %x\n",
558 __func__, status);
559 netdev->stats.tx_dropped++;
560 break;
561
562 case GELIC_DESCR_DMA_COMPLETE:
563 if (tx_chain->tail->skb) {
564 netdev->stats.tx_packets++;
565 netdev->stats.tx_bytes +=
566 tx_chain->tail->skb->len;
567 }
568 break;
569
570 case GELIC_DESCR_DMA_CARDOWNED:
571 /* pending tx request */
572 default:
573 /* any other value (== GELIC_DESCR_DMA_NOT_IN_USE) */
574 if (!stop)
575 goto out;
576 }
577 gelic_descr_release_tx(card, tx_chain->tail);
578 release ++;
579 }
580 out:
581 if (!stop && release)
582 gelic_card_wake_queues(card);
583 }
584
585 /**
586 * gelic_net_set_multi - sets multicast addresses and promisc flags
587 * @netdev: interface device structure
588 *
589 * gelic_net_set_multi configures multicast addresses as needed for the
590 * netdev interface. It also sets up multicast, allmulti and promisc
591 * flags appropriately
592 */
593 void gelic_net_set_multi(struct net_device *netdev)
594 {
595 struct gelic_card *card = netdev_card(netdev);
596 struct netdev_hw_addr *ha;
597 unsigned int i;
598 uint8_t *p;
599 u64 addr;
600 int status;
601
602 /* clear all multicast address */
603 status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
604 0, 1);
605 if (status)
606 dev_err(ctodev(card),
607 "lv1_net_remove_multicast_address failed %d\n",
608 status);
609 /* set broadcast address */
610 status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
611 GELIC_NET_BROADCAST_ADDR, 0);
612 if (status)
613 dev_err(ctodev(card),
614 "lv1_net_add_multicast_address failed, %d\n",
615 status);
616
617 if ((netdev->flags & IFF_ALLMULTI) ||
618 (netdev_mc_count(netdev) > GELIC_NET_MC_COUNT_MAX)) {
619 status = lv1_net_add_multicast_address(bus_id(card),
620 dev_id(card),
621 0, 1);
622 if (status)
623 dev_err(ctodev(card),
624 "lv1_net_add_multicast_address failed, %d\n",
625 status);
626 return;
627 }
628
629 /* set multicast addresses */
630 netdev_for_each_mc_addr(ha, netdev) {
631 addr = 0;
632 p = ha->addr;
633 for (i = 0; i < ETH_ALEN; i++) {
634 addr <<= 8;
635 addr |= *p++;
636 }
637 status = lv1_net_add_multicast_address(bus_id(card),
638 dev_id(card),
639 addr, 0);
640 if (status)
641 dev_err(ctodev(card),
642 "lv1_net_add_multicast_address failed, %d\n",
643 status);
644 }
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 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 = 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 card->tx_dma_progress = 0;
823 dev_info(ctodev(card), "lv1_net_start_txdma failed," \
824 "status=%d\n", status);
825 }
826 }
827 return status;
828 }
829
830 /**
831 * gelic_net_xmit - transmits a frame over the device
832 * @skb: packet to send out
833 * @netdev: interface device structure
834 *
835 * returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure
836 */
837 netdev_tx_t gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
838 {
839 struct gelic_card *card = netdev_card(netdev);
840 struct gelic_descr *descr;
841 int result;
842 unsigned long flags;
843
844 spin_lock_irqsave(&card->tx_lock, flags);
845
846 gelic_card_release_tx_chain(card, 0);
847
848 descr = gelic_card_get_next_tx_descr(card);
849 if (!descr) {
850 /*
851 * no more descriptors free
852 */
853 gelic_card_stop_queues(card);
854 spin_unlock_irqrestore(&card->tx_lock, flags);
855 return NETDEV_TX_BUSY;
856 }
857
858 result = gelic_descr_prepare_tx(card, descr, skb);
859 if (result) {
860 /*
861 * DMA map failed. As chances are that failure
862 * would continue, just release skb and return
863 */
864 netdev->stats.tx_dropped++;
865 dev_kfree_skb_any(skb);
866 spin_unlock_irqrestore(&card->tx_lock, flags);
867 return NETDEV_TX_OK;
868 }
869 /*
870 * link this prepared descriptor to previous one
871 * to achieve high performance
872 */
873 descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
874 /*
875 * as hardware descriptor is modified in the above lines,
876 * ensure that the hardware sees it
877 */
878 wmb();
879 if (gelic_card_kick_txdma(card, descr)) {
880 /*
881 * kick failed.
882 * release descriptor which was just prepared
883 */
884 netdev->stats.tx_dropped++;
885 /* don't trigger BUG_ON() in gelic_descr_release_tx */
886 descr->data_status = cpu_to_be32(GELIC_DESCR_TX_TAIL);
887 gelic_descr_release_tx(card, descr);
888 /* reset head */
889 card->tx_chain.head = descr;
890 /* reset hw termination */
891 descr->prev->next_descr_addr = 0;
892 dev_info(ctodev(card), "%s: kick failure\n", __func__);
893 }
894
895 spin_unlock_irqrestore(&card->tx_lock, flags);
896 return NETDEV_TX_OK;
897 }
898
899 /**
900 * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
901 * @descr: descriptor to process
902 * @card: card structure
903 * @netdev: net_device structure to be passed packet
904 *
905 * iommu-unmaps the skb, fills out skb structure and passes the data to the
906 * stack. The descriptor state is not changed.
907 */
908 static void gelic_net_pass_skb_up(struct gelic_descr *descr,
909 struct gelic_card *card,
910 struct net_device *netdev)
911
912 {
913 struct sk_buff *skb = descr->skb;
914 u32 data_status, data_error;
915
916 data_status = be32_to_cpu(descr->data_status);
917 data_error = be32_to_cpu(descr->data_error);
918 /* unmap skb buffer */
919 dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
920 GELIC_NET_MAX_MTU,
921 DMA_FROM_DEVICE);
922
923 skb_put(skb, be32_to_cpu(descr->valid_size)?
924 be32_to_cpu(descr->valid_size) :
925 be32_to_cpu(descr->result_size));
926 if (!descr->valid_size)
927 dev_info(ctodev(card), "buffer full %x %x %x\n",
928 be32_to_cpu(descr->result_size),
929 be32_to_cpu(descr->buf_size),
930 be32_to_cpu(descr->dmac_cmd_status));
931
932 descr->skb = NULL;
933 /*
934 * the card put 2 bytes vlan tag in front
935 * of the ethernet frame
936 */
937 skb_pull(skb, 2);
938 skb->protocol = eth_type_trans(skb, netdev);
939
940 /* checksum offload */
941 if (netdev->features & NETIF_F_RXCSUM) {
942 if ((data_status & GELIC_DESCR_DATA_STATUS_CHK_MASK) &&
943 (!(data_error & GELIC_DESCR_DATA_ERROR_CHK_MASK)))
944 skb->ip_summed = CHECKSUM_UNNECESSARY;
945 else
946 skb_checksum_none_assert(skb);
947 } else
948 skb_checksum_none_assert(skb);
949
950 /* update netdevice statistics */
951 netdev->stats.rx_packets++;
952 netdev->stats.rx_bytes += skb->len;
953
954 /* pass skb up to stack */
955 netif_receive_skb(skb);
956 }
957
958 /**
959 * gelic_card_decode_one_descr - processes an rx descriptor
960 * @card: card structure
961 *
962 * returns 1 if a packet has been sent to the stack, otherwise 0
963 *
964 * processes an rx descriptor by iommu-unmapping the data buffer and passing
965 * the packet up to the stack
966 */
967 static int gelic_card_decode_one_descr(struct gelic_card *card)
968 {
969 enum gelic_descr_dma_status status;
970 struct gelic_descr_chain *chain = &card->rx_chain;
971 struct gelic_descr *descr = chain->head;
972 struct net_device *netdev = NULL;
973 int dmac_chain_ended;
974
975 status = gelic_descr_get_status(descr);
976
977 if (status == GELIC_DESCR_DMA_CARDOWNED)
978 return 0;
979
980 if (status == GELIC_DESCR_DMA_NOT_IN_USE) {
981 dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
982 return 0;
983 }
984
985 /* netdevice select */
986 if (card->vlan_required) {
987 unsigned int i;
988 u16 vid;
989 vid = *(u16 *)(descr->skb->data) & VLAN_VID_MASK;
990 for (i = 0; i < GELIC_PORT_MAX; i++) {
991 if (card->vlan[i].rx == vid) {
992 netdev = card->netdev[i];
993 break;
994 }
995 }
996 if (GELIC_PORT_MAX <= i) {
997 pr_info("%s: unknown packet vid=%x\n", __func__, vid);
998 goto refill;
999 }
1000 } else
1001 netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1002
1003 if ((status == GELIC_DESCR_DMA_RESPONSE_ERROR) ||
1004 (status == GELIC_DESCR_DMA_PROTECTION_ERROR) ||
1005 (status == GELIC_DESCR_DMA_FORCE_END)) {
1006 dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
1007 status);
1008 netdev->stats.rx_dropped++;
1009 goto refill;
1010 }
1011
1012 if (status == GELIC_DESCR_DMA_BUFFER_FULL) {
1013 /*
1014 * Buffer full would occur if and only if
1015 * the frame length was longer than the size of this
1016 * descriptor's buffer. If the frame length was equal
1017 * to or shorter than buffer'size, FRAME_END condition
1018 * would occur.
1019 * Anyway this frame was longer than the MTU,
1020 * just drop it.
1021 */
1022 dev_info(ctodev(card), "overlength frame\n");
1023 goto refill;
1024 }
1025 /*
1026 * descriptors any other than FRAME_END here should
1027 * be treated as error.
1028 */
1029 if (status != GELIC_DESCR_DMA_FRAME_END) {
1030 dev_dbg(ctodev(card), "RX descriptor with state %x\n",
1031 status);
1032 goto refill;
1033 }
1034
1035 /* ok, we've got a packet in descr */
1036 gelic_net_pass_skb_up(descr, card, netdev);
1037 refill:
1038
1039 /* is the current descriptor terminated with next_descr == NULL? */
1040 dmac_chain_ended =
1041 be32_to_cpu(descr->dmac_cmd_status) &
1042 GELIC_DESCR_RX_DMA_CHAIN_END;
1043 /*
1044 * So that always DMAC can see the end
1045 * of the descriptor chain to avoid
1046 * from unwanted DMAC overrun.
1047 */
1048 descr->next_descr_addr = 0;
1049
1050 /* change the descriptor state: */
1051 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
1052
1053 /*
1054 * this call can fail, but for now, just leave this
1055 * descriptor without skb
1056 */
1057 gelic_descr_prepare_rx(card, descr);
1058
1059 chain->tail = descr;
1060 chain->head = descr->next;
1061
1062 /*
1063 * Set this descriptor the end of the chain.
1064 */
1065 descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
1066
1067 /*
1068 * If dmac chain was met, DMAC stopped.
1069 * thus re-enable it
1070 */
1071
1072 if (dmac_chain_ended)
1073 gelic_card_enable_rxdmac(card);
1074
1075 return 1;
1076 }
1077
1078 /**
1079 * gelic_net_poll - NAPI poll function called by the stack to return packets
1080 * @napi: napi structure
1081 * @budget: number of packets we can pass to the stack at most
1082 *
1083 * returns the number of the processed packets
1084 *
1085 */
1086 static int gelic_net_poll(struct napi_struct *napi, int budget)
1087 {
1088 struct gelic_card *card = container_of(napi, struct gelic_card, napi);
1089 int packets_done = 0;
1090
1091 while (packets_done < budget) {
1092 if (!gelic_card_decode_one_descr(card))
1093 break;
1094
1095 packets_done++;
1096 }
1097
1098 if (packets_done < budget) {
1099 napi_complete_done(napi, packets_done);
1100 gelic_card_rx_irq_on(card);
1101 }
1102 return packets_done;
1103 }
1104
1105 /**
1106 * gelic_card_interrupt - event handler for gelic_net
1107 */
1108 static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
1109 {
1110 unsigned long flags;
1111 struct gelic_card *card = ptr;
1112 u64 status;
1113
1114 status = card->irq_status;
1115
1116 if (!status)
1117 return IRQ_NONE;
1118
1119 status &= card->irq_mask;
1120
1121 if (status & GELIC_CARD_RXINT) {
1122 gelic_card_rx_irq_off(card);
1123 napi_schedule(&card->napi);
1124 }
1125
1126 if (status & GELIC_CARD_TXINT) {
1127 spin_lock_irqsave(&card->tx_lock, flags);
1128 card->tx_dma_progress = 0;
1129 gelic_card_release_tx_chain(card, 0);
1130 /* kick outstanding tx descriptor if any */
1131 gelic_card_kick_txdma(card, card->tx_chain.tail);
1132 spin_unlock_irqrestore(&card->tx_lock, flags);
1133 }
1134
1135 /* ether port status changed */
1136 if (status & GELIC_CARD_PORT_STATUS_CHANGED)
1137 gelic_card_get_ether_port_status(card, 1);
1138
1139 #ifdef CONFIG_GELIC_WIRELESS
1140 if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
1141 GELIC_CARD_WLAN_COMMAND_COMPLETED))
1142 gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
1143 #endif
1144
1145 return IRQ_HANDLED;
1146 }
1147
1148 #ifdef CONFIG_NET_POLL_CONTROLLER
1149 /**
1150 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1151 * @netdev: interface device structure
1152 *
1153 * see Documentation/networking/netconsole.txt
1154 */
1155 void gelic_net_poll_controller(struct net_device *netdev)
1156 {
1157 struct gelic_card *card = netdev_card(netdev);
1158
1159 gelic_card_set_irq_mask(card, 0);
1160 gelic_card_interrupt(netdev->irq, netdev);
1161 gelic_card_set_irq_mask(card, card->irq_mask);
1162 }
1163 #endif /* CONFIG_NET_POLL_CONTROLLER */
1164
1165 /**
1166 * gelic_net_open - called upon ifconfig up
1167 * @netdev: interface device structure
1168 *
1169 * returns 0 on success, <0 on failure
1170 *
1171 * gelic_net_open allocates all the descriptors and memory needed for
1172 * operation, sets up multicast list and enables interrupts
1173 */
1174 int gelic_net_open(struct net_device *netdev)
1175 {
1176 struct gelic_card *card = netdev_card(netdev);
1177
1178 dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
1179
1180 gelic_card_up(card);
1181
1182 netif_start_queue(netdev);
1183 gelic_card_get_ether_port_status(card, 1);
1184
1185 dev_dbg(ctodev(card), " <- %s\n", __func__);
1186 return 0;
1187 }
1188
1189 void gelic_net_get_drvinfo(struct net_device *netdev,
1190 struct ethtool_drvinfo *info)
1191 {
1192 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1193 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1194 }
1195
1196 static int gelic_ether_get_link_ksettings(struct net_device *netdev,
1197 struct ethtool_link_ksettings *cmd)
1198 {
1199 struct gelic_card *card = netdev_card(netdev);
1200 u32 supported, advertising;
1201
1202 gelic_card_get_ether_port_status(card, 0);
1203
1204 if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
1205 cmd->base.duplex = DUPLEX_FULL;
1206 else
1207 cmd->base.duplex = DUPLEX_HALF;
1208
1209 switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
1210 case GELIC_LV1_ETHER_SPEED_10:
1211 cmd->base.speed = SPEED_10;
1212 break;
1213 case GELIC_LV1_ETHER_SPEED_100:
1214 cmd->base.speed = SPEED_100;
1215 break;
1216 case GELIC_LV1_ETHER_SPEED_1000:
1217 cmd->base.speed = SPEED_1000;
1218 break;
1219 default:
1220 pr_info("%s: speed unknown\n", __func__);
1221 cmd->base.speed = SPEED_10;
1222 break;
1223 }
1224
1225 supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1226 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1227 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1228 SUPPORTED_1000baseT_Full;
1229 advertising = supported;
1230 if (card->link_mode & GELIC_LV1_ETHER_AUTO_NEG) {
1231 cmd->base.autoneg = AUTONEG_ENABLE;
1232 } else {
1233 cmd->base.autoneg = AUTONEG_DISABLE;
1234 advertising &= ~ADVERTISED_Autoneg;
1235 }
1236 cmd->base.port = PORT_TP;
1237
1238 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1239 supported);
1240 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1241 advertising);
1242
1243 return 0;
1244 }
1245
1246 static int
1247 gelic_ether_set_link_ksettings(struct net_device *netdev,
1248 const struct ethtool_link_ksettings *cmd)
1249 {
1250 struct gelic_card *card = netdev_card(netdev);
1251 u64 mode;
1252 int ret;
1253
1254 if (cmd->base.autoneg == AUTONEG_ENABLE) {
1255 mode = GELIC_LV1_ETHER_AUTO_NEG;
1256 } else {
1257 switch (cmd->base.speed) {
1258 case SPEED_10:
1259 mode = GELIC_LV1_ETHER_SPEED_10;
1260 break;
1261 case SPEED_100:
1262 mode = GELIC_LV1_ETHER_SPEED_100;
1263 break;
1264 case SPEED_1000:
1265 mode = GELIC_LV1_ETHER_SPEED_1000;
1266 break;
1267 default:
1268 return -EINVAL;
1269 }
1270 if (cmd->base.duplex == DUPLEX_FULL) {
1271 mode |= GELIC_LV1_ETHER_FULL_DUPLEX;
1272 } else if (cmd->base.speed == SPEED_1000) {
1273 pr_info("1000 half duplex is not supported.\n");
1274 return -EINVAL;
1275 }
1276 }
1277
1278 ret = gelic_card_set_link_mode(card, mode);
1279
1280 if (ret)
1281 return ret;
1282
1283 return 0;
1284 }
1285
1286 static void gelic_net_get_wol(struct net_device *netdev,
1287 struct ethtool_wolinfo *wol)
1288 {
1289 if (0 <= ps3_compare_firmware_version(2, 2, 0))
1290 wol->supported = WAKE_MAGIC;
1291 else
1292 wol->supported = 0;
1293
1294 wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
1295 memset(&wol->sopass, 0, sizeof(wol->sopass));
1296 }
1297 static int gelic_net_set_wol(struct net_device *netdev,
1298 struct ethtool_wolinfo *wol)
1299 {
1300 int status;
1301 struct gelic_card *card;
1302 u64 v1, v2;
1303
1304 if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
1305 !capable(CAP_NET_ADMIN))
1306 return -EPERM;
1307
1308 if (wol->wolopts & ~WAKE_MAGIC)
1309 return -EINVAL;
1310
1311 card = netdev_card(netdev);
1312 if (wol->wolopts & WAKE_MAGIC) {
1313 status = lv1_net_control(bus_id(card), dev_id(card),
1314 GELIC_LV1_SET_WOL,
1315 GELIC_LV1_WOL_MAGIC_PACKET,
1316 0, GELIC_LV1_WOL_MP_ENABLE,
1317 &v1, &v2);
1318 if (status) {
1319 pr_info("%s: enabling WOL failed %d\n", __func__,
1320 status);
1321 status = -EIO;
1322 goto done;
1323 }
1324 status = lv1_net_control(bus_id(card), dev_id(card),
1325 GELIC_LV1_SET_WOL,
1326 GELIC_LV1_WOL_ADD_MATCH_ADDR,
1327 0, GELIC_LV1_WOL_MATCH_ALL,
1328 &v1, &v2);
1329 if (!status)
1330 ps3_sys_manager_set_wol(1);
1331 else {
1332 pr_info("%s: enabling WOL filter failed %d\n",
1333 __func__, status);
1334 status = -EIO;
1335 }
1336 } else {
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_DISABLE,
1341 &v1, &v2);
1342 if (status) {
1343 pr_info("%s: disabling 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_DELETE_MATCH_ADDR,
1351 0, GELIC_LV1_WOL_MATCH_ALL,
1352 &v1, &v2);
1353 if (!status)
1354 ps3_sys_manager_set_wol(0);
1355 else {
1356 pr_info("%s: removing WOL filter failed %d\n",
1357 __func__, status);
1358 status = -EIO;
1359 }
1360 }
1361 done:
1362 return status;
1363 }
1364
1365 static const struct ethtool_ops gelic_ether_ethtool_ops = {
1366 .get_drvinfo = gelic_net_get_drvinfo,
1367 .get_link = ethtool_op_get_link,
1368 .get_wol = gelic_net_get_wol,
1369 .set_wol = gelic_net_set_wol,
1370 .get_link_ksettings = gelic_ether_get_link_ksettings,
1371 .set_link_ksettings = gelic_ether_set_link_ksettings,
1372 };
1373
1374 /**
1375 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1376 * function (to be called not under interrupt status)
1377 * @work: work is context of tx timout task
1378 *
1379 * called as task when tx hangs, resets interface (if interface is up)
1380 */
1381 static void gelic_net_tx_timeout_task(struct work_struct *work)
1382 {
1383 struct gelic_card *card =
1384 container_of(work, struct gelic_card, tx_timeout_task);
1385 struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1386
1387 dev_info(ctodev(card), "%s:Timed out. Restarting...\n", __func__);
1388
1389 if (!(netdev->flags & IFF_UP))
1390 goto out;
1391
1392 netif_device_detach(netdev);
1393 gelic_net_stop(netdev);
1394
1395 gelic_net_open(netdev);
1396 netif_device_attach(netdev);
1397
1398 out:
1399 atomic_dec(&card->tx_timeout_task_counter);
1400 }
1401
1402 /**
1403 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1404 * @netdev: interface device structure
1405 *
1406 * called, if tx hangs. Schedules a task that resets the interface
1407 */
1408 void gelic_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1409 {
1410 struct gelic_card *card;
1411
1412 card = netdev_card(netdev);
1413 atomic_inc(&card->tx_timeout_task_counter);
1414 if (netdev->flags & IFF_UP)
1415 schedule_work(&card->tx_timeout_task);
1416 else
1417 atomic_dec(&card->tx_timeout_task_counter);
1418 }
1419
1420 static const struct net_device_ops gelic_netdevice_ops = {
1421 .ndo_open = gelic_net_open,
1422 .ndo_stop = gelic_net_stop,
1423 .ndo_start_xmit = gelic_net_xmit,
1424 .ndo_set_rx_mode = gelic_net_set_multi,
1425 .ndo_tx_timeout = gelic_net_tx_timeout,
1426 .ndo_set_mac_address = eth_mac_addr,
1427 .ndo_validate_addr = eth_validate_addr,
1428 #ifdef CONFIG_NET_POLL_CONTROLLER
1429 .ndo_poll_controller = gelic_net_poll_controller,
1430 #endif
1431 };
1432
1433 /**
1434 * gelic_ether_setup_netdev_ops - initialization of net_device operations
1435 * @netdev: net_device structure
1436 *
1437 * fills out function pointers in the net_device structure
1438 */
1439 static void gelic_ether_setup_netdev_ops(struct net_device *netdev,
1440 struct napi_struct *napi)
1441 {
1442 netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
1443 /* NAPI */
1444 netif_napi_add(netdev, napi, gelic_net_poll, NAPI_POLL_WEIGHT);
1445 netdev->ethtool_ops = &gelic_ether_ethtool_ops;
1446 netdev->netdev_ops = &gelic_netdevice_ops;
1447 }
1448
1449 /**
1450 * gelic_ether_setup_netdev - initialization of net_device
1451 * @netdev: net_device structure
1452 * @card: card structure
1453 *
1454 * Returns 0 on success or <0 on failure
1455 *
1456 * gelic_ether_setup_netdev initializes the net_device structure
1457 * and register it.
1458 **/
1459 int gelic_net_setup_netdev(struct net_device *netdev, struct gelic_card *card)
1460 {
1461 int status;
1462 u64 v1, v2;
1463
1464 netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1465
1466 netdev->features = NETIF_F_IP_CSUM;
1467 if (GELIC_CARD_RX_CSUM_DEFAULT)
1468 netdev->features |= NETIF_F_RXCSUM;
1469
1470 status = lv1_net_control(bus_id(card), dev_id(card),
1471 GELIC_LV1_GET_MAC_ADDRESS,
1472 0, 0, 0, &v1, &v2);
1473 v1 <<= 16;
1474 if (status || !is_valid_ether_addr((u8 *)&v1)) {
1475 dev_info(ctodev(card),
1476 "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
1477 __func__, status);
1478 return -EINVAL;
1479 }
1480 memcpy(netdev->dev_addr, &v1, ETH_ALEN);
1481
1482 if (card->vlan_required) {
1483 netdev->hard_header_len += VLAN_HLEN;
1484 /*
1485 * As vlan is internally used,
1486 * we can not receive vlan packets
1487 */
1488 netdev->features |= NETIF_F_VLAN_CHALLENGED;
1489 }
1490
1491 /* MTU range: 64 - 1518 */
1492 netdev->min_mtu = GELIC_NET_MIN_MTU;
1493 netdev->max_mtu = GELIC_NET_MAX_MTU;
1494
1495 status = register_netdev(netdev);
1496 if (status) {
1497 dev_err(ctodev(card), "%s:Couldn't register %s %d\n",
1498 __func__, netdev->name, status);
1499 return status;
1500 }
1501 dev_info(ctodev(card), "%s: MAC addr %pM\n",
1502 netdev->name, netdev->dev_addr);
1503
1504 return 0;
1505 }
1506
1507 /**
1508 * gelic_alloc_card_net - allocates net_device and card structure
1509 *
1510 * returns the card structure or NULL in case of errors
1511 *
1512 * the card and net_device structures are linked to each other
1513 */
1514 #define GELIC_ALIGN (32)
1515 static struct gelic_card *gelic_alloc_card_net(struct net_device **netdev)
1516 {
1517 struct gelic_card *card;
1518 struct gelic_port *port;
1519 void *p;
1520 size_t alloc_size;
1521 /*
1522 * gelic requires dma descriptor is 32 bytes aligned and
1523 * the hypervisor requires irq_status is 8 bytes aligned.
1524 */
1525 BUILD_BUG_ON(offsetof(struct gelic_card, irq_status) % 8);
1526 BUILD_BUG_ON(offsetof(struct gelic_card, descr) % 32);
1527 alloc_size =
1528 sizeof(struct gelic_card) +
1529 sizeof(struct gelic_descr) * GELIC_NET_RX_DESCRIPTORS +
1530 sizeof(struct gelic_descr) * GELIC_NET_TX_DESCRIPTORS +
1531 GELIC_ALIGN - 1;
1532
1533 p = kzalloc(alloc_size, GFP_KERNEL);
1534 if (!p)
1535 return NULL;
1536 card = PTR_ALIGN(p, GELIC_ALIGN);
1537 card->unalign = p;
1538
1539 /*
1540 * alloc netdev
1541 */
1542 *netdev = alloc_etherdev(sizeof(struct gelic_port));
1543 if (!*netdev) {
1544 kfree(card->unalign);
1545 return NULL;
1546 }
1547 port = netdev_priv(*netdev);
1548
1549 /* gelic_port */
1550 port->netdev = *netdev;
1551 port->card = card;
1552 port->type = GELIC_PORT_ETHERNET_0;
1553
1554 /* gelic_card */
1555 card->netdev[GELIC_PORT_ETHERNET_0] = *netdev;
1556
1557 INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
1558 init_waitqueue_head(&card->waitq);
1559 atomic_set(&card->tx_timeout_task_counter, 0);
1560 mutex_init(&card->updown_lock);
1561 atomic_set(&card->users, 0);
1562
1563 return card;
1564 }
1565
1566 static void gelic_card_get_vlan_info(struct gelic_card *card)
1567 {
1568 u64 v1, v2;
1569 int status;
1570 unsigned int i;
1571 struct {
1572 int tx;
1573 int rx;
1574 } vlan_id_ix[2] = {
1575 [GELIC_PORT_ETHERNET_0] = {
1576 .tx = GELIC_LV1_VLAN_TX_ETHERNET_0,
1577 .rx = GELIC_LV1_VLAN_RX_ETHERNET_0
1578 },
1579 [GELIC_PORT_WIRELESS] = {
1580 .tx = GELIC_LV1_VLAN_TX_WIRELESS,
1581 .rx = GELIC_LV1_VLAN_RX_WIRELESS
1582 }
1583 };
1584
1585 for (i = 0; i < ARRAY_SIZE(vlan_id_ix); i++) {
1586 /* tx tag */
1587 status = lv1_net_control(bus_id(card), dev_id(card),
1588 GELIC_LV1_GET_VLAN_ID,
1589 vlan_id_ix[i].tx,
1590 0, 0, &v1, &v2);
1591 if (status || !v1) {
1592 if (status != LV1_NO_ENTRY)
1593 dev_dbg(ctodev(card),
1594 "get vlan id for tx(%d) failed(%d)\n",
1595 vlan_id_ix[i].tx, status);
1596 card->vlan[i].tx = 0;
1597 card->vlan[i].rx = 0;
1598 continue;
1599 }
1600 card->vlan[i].tx = (u16)v1;
1601
1602 /* rx tag */
1603 status = lv1_net_control(bus_id(card), dev_id(card),
1604 GELIC_LV1_GET_VLAN_ID,
1605 vlan_id_ix[i].rx,
1606 0, 0, &v1, &v2);
1607 if (status || !v1) {
1608 if (status != LV1_NO_ENTRY)
1609 dev_info(ctodev(card),
1610 "get vlan id for rx(%d) failed(%d)\n",
1611 vlan_id_ix[i].rx, status);
1612 card->vlan[i].tx = 0;
1613 card->vlan[i].rx = 0;
1614 continue;
1615 }
1616 card->vlan[i].rx = (u16)v1;
1617
1618 dev_dbg(ctodev(card), "vlan_id[%d] tx=%02x rx=%02x\n",
1619 i, card->vlan[i].tx, card->vlan[i].rx);
1620 }
1621
1622 if (card->vlan[GELIC_PORT_ETHERNET_0].tx) {
1623 BUG_ON(!card->vlan[GELIC_PORT_WIRELESS].tx);
1624 card->vlan_required = 1;
1625 } else
1626 card->vlan_required = 0;
1627
1628 /* check wirelss capable firmware */
1629 if (ps3_compare_firmware_version(1, 6, 0) < 0) {
1630 card->vlan[GELIC_PORT_WIRELESS].tx = 0;
1631 card->vlan[GELIC_PORT_WIRELESS].rx = 0;
1632 }
1633
1634 dev_info(ctodev(card), "internal vlan %s\n",
1635 card->vlan_required? "enabled" : "disabled");
1636 }
1637 /**
1638 * ps3_gelic_driver_probe - add a device to the control of this driver
1639 */
1640 static int ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
1641 {
1642 struct gelic_card *card;
1643 struct net_device *netdev;
1644 int result;
1645
1646 pr_debug("%s: called\n", __func__);
1647
1648 udbg_shutdown_ps3gelic();
1649
1650 result = ps3_open_hv_device(dev);
1651
1652 if (result) {
1653 dev_dbg(&dev->core, "%s:ps3_open_hv_device failed\n",
1654 __func__);
1655 goto fail_open;
1656 }
1657
1658 result = ps3_dma_region_create(dev->d_region);
1659
1660 if (result) {
1661 dev_dbg(&dev->core, "%s:ps3_dma_region_create failed(%d)\n",
1662 __func__, result);
1663 BUG_ON("check region type");
1664 goto fail_dma_region;
1665 }
1666
1667 /* alloc card/netdevice */
1668 card = gelic_alloc_card_net(&netdev);
1669 if (!card) {
1670 dev_info(&dev->core, "%s:gelic_net_alloc_card failed\n",
1671 __func__);
1672 result = -ENOMEM;
1673 goto fail_alloc_card;
1674 }
1675 ps3_system_bus_set_drvdata(dev, card);
1676 card->dev = dev;
1677
1678 /* get internal vlan info */
1679 gelic_card_get_vlan_info(card);
1680
1681 card->link_mode = GELIC_LV1_ETHER_AUTO_NEG;
1682
1683 /* setup interrupt */
1684 result = lv1_net_set_interrupt_status_indicator(bus_id(card),
1685 dev_id(card),
1686 ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
1687 0);
1688
1689 if (result) {
1690 dev_dbg(&dev->core,
1691 "%s:set_interrupt_status_indicator failed: %s\n",
1692 __func__, ps3_result(result));
1693 result = -EIO;
1694 goto fail_status_indicator;
1695 }
1696
1697 result = ps3_sb_event_receive_port_setup(dev, PS3_BINDING_CPU_ANY,
1698 &card->irq);
1699
1700 if (result) {
1701 dev_info(ctodev(card),
1702 "%s:gelic_net_open_device failed (%d)\n",
1703 __func__, result);
1704 result = -EPERM;
1705 goto fail_alloc_irq;
1706 }
1707 result = request_irq(card->irq, gelic_card_interrupt,
1708 0, netdev->name, card);
1709
1710 if (result) {
1711 dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
1712 __func__, result);
1713 goto fail_request_irq;
1714 }
1715
1716 /* setup card structure */
1717 card->irq_mask = GELIC_CARD_RXINT | GELIC_CARD_TXINT |
1718 GELIC_CARD_PORT_STATUS_CHANGED;
1719
1720
1721 result = gelic_card_init_chain(card, &card->tx_chain,
1722 card->descr, GELIC_NET_TX_DESCRIPTORS);
1723 if (result)
1724 goto fail_alloc_tx;
1725 result = gelic_card_init_chain(card, &card->rx_chain,
1726 card->descr + GELIC_NET_TX_DESCRIPTORS,
1727 GELIC_NET_RX_DESCRIPTORS);
1728 if (result)
1729 goto fail_alloc_rx;
1730
1731 /* head of chain */
1732 card->tx_top = card->tx_chain.head;
1733 card->rx_top = card->rx_chain.head;
1734 dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
1735 card->rx_top, card->tx_top, sizeof(struct gelic_descr),
1736 GELIC_NET_RX_DESCRIPTORS);
1737 /* allocate rx skbs */
1738 result = gelic_card_alloc_rx_skbs(card);
1739 if (result)
1740 goto fail_alloc_skbs;
1741
1742 spin_lock_init(&card->tx_lock);
1743 card->tx_dma_progress = 0;
1744
1745 /* setup net_device structure */
1746 netdev->irq = card->irq;
1747 SET_NETDEV_DEV(netdev, &card->dev->core);
1748 gelic_ether_setup_netdev_ops(netdev, &card->napi);
1749 result = gelic_net_setup_netdev(netdev, card);
1750 if (result) {
1751 dev_dbg(&dev->core, "%s: setup_netdev failed %d\n",
1752 __func__, result);
1753 goto fail_setup_netdev;
1754 }
1755
1756 #ifdef CONFIG_GELIC_WIRELESS
1757 result = gelic_wl_driver_probe(card);
1758 if (result) {
1759 dev_dbg(&dev->core, "%s: WL init failed\n", __func__);
1760 goto fail_setup_netdev;
1761 }
1762 #endif
1763 pr_debug("%s: done\n", __func__);
1764 return 0;
1765
1766 fail_setup_netdev:
1767 fail_alloc_skbs:
1768 gelic_card_free_chain(card, card->rx_chain.head);
1769 fail_alloc_rx:
1770 gelic_card_free_chain(card, card->tx_chain.head);
1771 fail_alloc_tx:
1772 free_irq(card->irq, card);
1773 netdev->irq = 0;
1774 fail_request_irq:
1775 ps3_sb_event_receive_port_destroy(dev, card->irq);
1776 fail_alloc_irq:
1777 lv1_net_set_interrupt_status_indicator(bus_id(card),
1778 bus_id(card),
1779 0, 0);
1780 fail_status_indicator:
1781 ps3_system_bus_set_drvdata(dev, NULL);
1782 kfree(netdev_card(netdev)->unalign);
1783 free_netdev(netdev);
1784 fail_alloc_card:
1785 ps3_dma_region_free(dev->d_region);
1786 fail_dma_region:
1787 ps3_close_hv_device(dev);
1788 fail_open:
1789 return result;
1790 }
1791
1792 /**
1793 * ps3_gelic_driver_remove - remove a device from the control of this driver
1794 */
1795
1796 static int ps3_gelic_driver_remove(struct ps3_system_bus_device *dev)
1797 {
1798 struct gelic_card *card = ps3_system_bus_get_drvdata(dev);
1799 struct net_device *netdev0;
1800 pr_debug("%s: called\n", __func__);
1801
1802 /* set auto-negotiation */
1803 gelic_card_set_link_mode(card, GELIC_LV1_ETHER_AUTO_NEG);
1804
1805 #ifdef CONFIG_GELIC_WIRELESS
1806 gelic_wl_driver_remove(card);
1807 #endif
1808 /* stop interrupt */
1809 gelic_card_set_irq_mask(card, 0);
1810
1811 /* turn off DMA, force end */
1812 gelic_card_disable_rxdmac(card);
1813 gelic_card_disable_txdmac(card);
1814
1815 /* release chains */
1816 gelic_card_release_tx_chain(card, 1);
1817 gelic_card_release_rx_chain(card);
1818
1819 gelic_card_free_chain(card, card->tx_top);
1820 gelic_card_free_chain(card, card->rx_top);
1821
1822 netdev0 = card->netdev[GELIC_PORT_ETHERNET_0];
1823 /* disconnect event port */
1824 free_irq(card->irq, card);
1825 netdev0->irq = 0;
1826 ps3_sb_event_receive_port_destroy(card->dev, card->irq);
1827
1828 wait_event(card->waitq,
1829 atomic_read(&card->tx_timeout_task_counter) == 0);
1830
1831 lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
1832 0 , 0);
1833
1834 unregister_netdev(netdev0);
1835 kfree(netdev_card(netdev0)->unalign);
1836 free_netdev(netdev0);
1837
1838 ps3_system_bus_set_drvdata(dev, NULL);
1839
1840 ps3_dma_region_free(dev->d_region);
1841
1842 ps3_close_hv_device(dev);
1843
1844 pr_debug("%s: done\n", __func__);
1845 return 0;
1846 }
1847
1848 static struct ps3_system_bus_driver ps3_gelic_driver = {
1849 .match_id = PS3_MATCH_ID_GELIC,
1850 .probe = ps3_gelic_driver_probe,
1851 .remove = ps3_gelic_driver_remove,
1852 .shutdown = ps3_gelic_driver_remove,
1853 .core.name = "ps3_gelic_driver",
1854 .core.owner = THIS_MODULE,
1855 };
1856
1857 static int __init ps3_gelic_driver_init (void)
1858 {
1859 return firmware_has_feature(FW_FEATURE_PS3_LV1)
1860 ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1861 : -ENODEV;
1862 }
1863
1864 static void __exit ps3_gelic_driver_exit (void)
1865 {
1866 ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1867 }
1868
1869 module_init(ps3_gelic_driver_init);
1870 module_exit(ps3_gelic_driver_exit);
1871
1872 MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1873
Linux with added FPC-III support