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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
43MODULE_AUTHOR("SCE Inc.");
44MODULE_DESCRIPTION("Gelic Network driver");
45MODULE_LICENSE("GPL");
46
47
48/* set irq_mask */
49int 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
61static 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}
66static 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
72static 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 */
98static enum gelic_descr_dma_status
99gelic_descr_get_status(struct gelic_descr *descr)
100{
101 return be32_to_cpu(descr->dmac_cmd_status) & GELIC_DESCR_DMA_STAT_MASK;
102}
103
104static 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 */
129static 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 */
147static 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 */
176static 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 */
195static 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 */
219static 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
236void 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
253void 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 */
284static 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 */
308static 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
350iommu_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 */
369static 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 return -ENOMEM;
386 }
387 descr->buf_size = cpu_to_be32(bufsize);
388 descr->dmac_cmd_status = 0;
389 descr->result_size = 0;
390 descr->valid_size = 0;
391 descr->data_error = 0;
392
393 offset = ((unsigned long)descr->skb->data) &
394 (GELIC_NET_RXBUF_ALIGN - 1);
395 if (offset)
396 skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
397 /* io-mmu-map the skb */
398 descr->buf_addr = cpu_to_be32(dma_map_single(ctodev(card),
399 descr->skb->data,
400 GELIC_NET_MAX_MTU,
401 DMA_FROM_DEVICE));
402 if (!descr->buf_addr) {
403 dev_kfree_skb_any(descr->skb);
404 descr->skb = NULL;
405 dev_info(ctodev(card),
406 "%s:Could not iommu-map rx buffer\n", __func__);
407 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
408 return -ENOMEM;
409 } else {
410 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
411 return 0;
412 }
413}
414
415/**
416 * gelic_card_release_rx_chain - free all skb of rx descr
417 * @card: card structure
418 *
419 */
420static void gelic_card_release_rx_chain(struct gelic_card *card)
421{
422 struct gelic_descr *descr = card->rx_chain.head;
423
424 do {
425 if (descr->skb) {
426 dma_unmap_single(ctodev(card),
427 be32_to_cpu(descr->buf_addr),
428 descr->skb->len,
429 DMA_FROM_DEVICE);
430 descr->buf_addr = 0;
431 dev_kfree_skb_any(descr->skb);
432 descr->skb = NULL;
433 gelic_descr_set_status(descr,
434 GELIC_DESCR_DMA_NOT_IN_USE);
435 }
436 descr = descr->next;
437 } while (descr != card->rx_chain.head);
438}
439
440/**
441 * gelic_card_fill_rx_chain - fills descriptors/skbs in the rx chains
442 * @card: card structure
443 *
444 * fills all descriptors in the rx chain: allocates skbs
445 * and iommu-maps them.
446 * returns 0 on success, < 0 on failure
447 */
448static int gelic_card_fill_rx_chain(struct gelic_card *card)
449{
450 struct gelic_descr *descr = card->rx_chain.head;
451 int ret;
452
453 do {
454 if (!descr->skb) {
455 ret = gelic_descr_prepare_rx(card, descr);
456 if (ret)
457 goto rewind;
458 }
459 descr = descr->next;
460 } while (descr != card->rx_chain.head);
461
462 return 0;
463rewind:
464 gelic_card_release_rx_chain(card);
465 return ret;
466}
467
468/**
469 * gelic_card_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
470 * @card: card structure
471 *
472 * returns 0 on success, < 0 on failure
473 */
474static int gelic_card_alloc_rx_skbs(struct gelic_card *card)
475{
476 struct gelic_descr_chain *chain;
477 int ret;
478 chain = &card->rx_chain;
479 ret = gelic_card_fill_rx_chain(card);
480 chain->tail = card->rx_top->prev; /* point to the last */
481 return ret;
482}
483
484/**
485 * gelic_descr_release_tx - processes a used tx descriptor
486 * @card: card structure
487 * @descr: descriptor to release
488 *
489 * releases a used tx descriptor (unmapping, freeing of skb)
490 */
491static void gelic_descr_release_tx(struct gelic_card *card,
492 struct gelic_descr *descr)
493{
494 struct sk_buff *skb = descr->skb;
495
496 BUG_ON(!(be32_to_cpu(descr->data_status) & GELIC_DESCR_TX_TAIL));
497
498 dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr), skb->len,
499 DMA_TO_DEVICE);
500 dev_kfree_skb_any(skb);
501
502 descr->buf_addr = 0;
503 descr->buf_size = 0;
504 descr->next_descr_addr = 0;
505 descr->result_size = 0;
506 descr->valid_size = 0;
507 descr->data_status = 0;
508 descr->data_error = 0;
509 descr->skb = NULL;
510
511 /* set descr status */
512 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
513}
514
515static void gelic_card_stop_queues(struct gelic_card *card)
516{
517 netif_stop_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
518
519 if (card->netdev[GELIC_PORT_WIRELESS])
520 netif_stop_queue(card->netdev[GELIC_PORT_WIRELESS]);
521}
522static void gelic_card_wake_queues(struct gelic_card *card)
523{
524 netif_wake_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
525
526 if (card->netdev[GELIC_PORT_WIRELESS])
527 netif_wake_queue(card->netdev[GELIC_PORT_WIRELESS]);
528}
529/**
530 * gelic_card_release_tx_chain - processes sent tx descriptors
531 * @card: adapter structure
532 * @stop: net_stop sequence
533 *
534 * releases the tx descriptors that gelic has finished with
535 */
536static void gelic_card_release_tx_chain(struct gelic_card *card, int stop)
537{
538 struct gelic_descr_chain *tx_chain;
539 enum gelic_descr_dma_status status;
540 struct net_device *netdev;
541 int release = 0;
542
543 for (tx_chain = &card->tx_chain;
544 tx_chain->head != tx_chain->tail && tx_chain->tail;
545 tx_chain->tail = tx_chain->tail->next) {
546 status = gelic_descr_get_status(tx_chain->tail);
547 netdev = tx_chain->tail->skb->dev;
548 switch (status) {
549 case GELIC_DESCR_DMA_RESPONSE_ERROR:
550 case GELIC_DESCR_DMA_PROTECTION_ERROR:
551 case GELIC_DESCR_DMA_FORCE_END:
552 if (printk_ratelimit())
553 dev_info(ctodev(card),
554 "%s: forcing end of tx descriptor " \
555 "with status %x\n",
556 __func__, status);
557 netdev->stats.tx_dropped++;
558 break;
559
560 case GELIC_DESCR_DMA_COMPLETE:
561 if (tx_chain->tail->skb) {
562 netdev->stats.tx_packets++;
563 netdev->stats.tx_bytes +=
564 tx_chain->tail->skb->len;
565 }
566 break;
567
568 case GELIC_DESCR_DMA_CARDOWNED:
569 /* pending tx request */
570 default:
571 /* any other value (== GELIC_DESCR_DMA_NOT_IN_USE) */
572 if (!stop)
573 goto out;
574 }
575 gelic_descr_release_tx(card, tx_chain->tail);
576 release ++;
577 }
578out:
579 if (!stop && release)
580 gelic_card_wake_queues(card);
581}
582
583/**
584 * gelic_net_set_multi - sets multicast addresses and promisc flags
585 * @netdev: interface device structure
586 *
587 * gelic_net_set_multi configures multicast addresses as needed for the
588 * netdev interface. It also sets up multicast, allmulti and promisc
589 * flags appropriately
590 */
591void gelic_net_set_multi(struct net_device *netdev)
592{
593 struct gelic_card *card = netdev_card(netdev);
594 struct netdev_hw_addr *ha;
595 unsigned int i;
596 uint8_t *p;
597 u64 addr;
598 int status;
599
600 /* clear all multicast address */
601 status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
602 0, 1);
603 if (status)
604 dev_err(ctodev(card),
605 "lv1_net_remove_multicast_address failed %d\n",
606 status);
607 /* set broadcast address */
608 status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
609 GELIC_NET_BROADCAST_ADDR, 0);
610 if (status)
611 dev_err(ctodev(card),
612 "lv1_net_add_multicast_address failed, %d\n",
613 status);
614
615 if ((netdev->flags & IFF_ALLMULTI) ||
616 (netdev_mc_count(netdev) > GELIC_NET_MC_COUNT_MAX)) {
617 status = lv1_net_add_multicast_address(bus_id(card),
618 dev_id(card),
619 0, 1);
620 if (status)
621 dev_err(ctodev(card),
622 "lv1_net_add_multicast_address failed, %d\n",
623 status);
624 return;
625 }
626
627 /* set multicast addresses */
628 netdev_for_each_mc_addr(ha, netdev) {
629 addr = 0;
630 p = ha->addr;
631 for (i = 0; i < ETH_ALEN; i++) {
632 addr <<= 8;
633 addr |= *p++;
634 }
635 status = lv1_net_add_multicast_address(bus_id(card),
636 dev_id(card),
637 addr, 0);
638 if (status)
639 dev_err(ctodev(card),
640 "lv1_net_add_multicast_address failed, %d\n",
641 status);
642 }
643}
644
645/**
646 * gelic_net_stop - called upon ifconfig down
647 * @netdev: interface device structure
648 *
649 * always returns 0
650 */
651int gelic_net_stop(struct net_device *netdev)
652{
653 struct gelic_card *card;
654
655 pr_debug("%s: start\n", __func__);
656
657 netif_stop_queue(netdev);
658 netif_carrier_off(netdev);
659
660 card = netdev_card(netdev);
661 gelic_card_down(card);
662
663 pr_debug("%s: done\n", __func__);
664 return 0;
665}
666
667/**
668 * gelic_card_get_next_tx_descr - returns the next available tx descriptor
669 * @card: device structure to get descriptor from
670 *
671 * returns the address of the next descriptor, or NULL if not available.
672 */
673static struct gelic_descr *
674gelic_card_get_next_tx_descr(struct gelic_card *card)
675{
676 if (!card->tx_chain.head)
677 return NULL;
678 /* see if the next descriptor is free */
679 if (card->tx_chain.tail != card->tx_chain.head->next &&
680 gelic_descr_get_status(card->tx_chain.head) ==
681 GELIC_DESCR_DMA_NOT_IN_USE)
682 return card->tx_chain.head;
683 else
684 return NULL;
685
686}
687
688/**
689 * gelic_net_set_txdescr_cmdstat - sets the tx descriptor command field
690 * @descr: descriptor structure to fill out
691 * @skb: packet to consider
692 *
693 * fills out the command and status field of the descriptor structure,
694 * depending on hardware checksum settings. This function assumes a wmb()
695 * has executed before.
696 */
697static void gelic_descr_set_tx_cmdstat(struct gelic_descr *descr,
698 struct sk_buff *skb)
699{
700 if (skb->ip_summed != CHECKSUM_PARTIAL)
701 descr->dmac_cmd_status =
702 cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
703 GELIC_DESCR_TX_DMA_FRAME_TAIL);
704 else {
705 /* is packet ip?
706 * if yes: tcp? udp? */
707 if (skb->protocol == htons(ETH_P_IP)) {
708 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
709 descr->dmac_cmd_status =
710 cpu_to_be32(GELIC_DESCR_DMA_CMD_TCP_CHKSUM |
711 GELIC_DESCR_TX_DMA_FRAME_TAIL);
712
713 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
714 descr->dmac_cmd_status =
715 cpu_to_be32(GELIC_DESCR_DMA_CMD_UDP_CHKSUM |
716 GELIC_DESCR_TX_DMA_FRAME_TAIL);
717 else /*
718 * the stack should checksum non-tcp and non-udp
719 * packets on his own: NETIF_F_IP_CSUM
720 */
721 descr->dmac_cmd_status =
722 cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
723 GELIC_DESCR_TX_DMA_FRAME_TAIL);
724 }
725 }
726}
727
728static struct sk_buff *gelic_put_vlan_tag(struct sk_buff *skb,
729 unsigned short tag)
730{
731 struct vlan_ethhdr *veth;
732 static unsigned int c;
733
734 if (skb_headroom(skb) < VLAN_HLEN) {
735 struct sk_buff *sk_tmp = skb;
736 pr_debug("%s: hd=%d c=%ud\n", __func__, skb_headroom(skb), c);
737 skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
738 if (!skb)
739 return NULL;
740 dev_kfree_skb_any(sk_tmp);
741 }
742 veth = skb_push(skb, VLAN_HLEN);
743
744 /* Move the mac addresses to the top of buffer */
745 memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
746
747 veth->h_vlan_proto = cpu_to_be16(ETH_P_8021Q);
748 veth->h_vlan_TCI = htons(tag);
749
750 return skb;
751}
752
753/**
754 * gelic_descr_prepare_tx - setup a descriptor for sending packets
755 * @card: card structure
756 * @descr: descriptor structure
757 * @skb: packet to use
758 *
759 * returns 0 on success, <0 on failure.
760 *
761 */
762static int gelic_descr_prepare_tx(struct gelic_card *card,
763 struct gelic_descr *descr,
764 struct sk_buff *skb)
765{
766 dma_addr_t buf;
767
768 if (card->vlan_required) {
769 struct sk_buff *skb_tmp;
770 enum gelic_port_type type;
771
772 type = netdev_port(skb->dev)->type;
773 skb_tmp = gelic_put_vlan_tag(skb,
774 card->vlan[type].tx);
775 if (!skb_tmp)
776 return -ENOMEM;
777 skb = skb_tmp;
778 }
779
780 buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE);
781
782 if (!buf) {
783 dev_err(ctodev(card),
784 "dma map 2 failed (%p, %i). Dropping packet\n",
785 skb->data, skb->len);
786 return -ENOMEM;
787 }
788
789 descr->buf_addr = cpu_to_be32(buf);
790 descr->buf_size = cpu_to_be32(skb->len);
791 descr->skb = skb;
792 descr->data_status = 0;
793 descr->next_descr_addr = 0; /* terminate hw descr */
794 gelic_descr_set_tx_cmdstat(descr, skb);
795
796 /* bump free descriptor pointer */
797 card->tx_chain.head = descr->next;
798 return 0;
799}
800
801/**
802 * gelic_card_kick_txdma - enables TX DMA processing
803 * @card: card structure
804 * @descr: descriptor address to enable TX processing at
805 *
806 */
807static int gelic_card_kick_txdma(struct gelic_card *card,
808 struct gelic_descr *descr)
809{
810 int status = 0;
811
812 if (card->tx_dma_progress)
813 return 0;
814
815 if (gelic_descr_get_status(descr) == GELIC_DESCR_DMA_CARDOWNED) {
816 card->tx_dma_progress = 1;
817 status = lv1_net_start_tx_dma(bus_id(card), dev_id(card),
818 descr->bus_addr, 0);
819 if (status) {
820 card->tx_dma_progress = 0;
821 dev_info(ctodev(card), "lv1_net_start_txdma failed," \
822 "status=%d\n", status);
823 }
824 }
825 return status;
826}
827
828/**
829 * gelic_net_xmit - transmits a frame over the device
830 * @skb: packet to send out
831 * @netdev: interface device structure
832 *
833 * returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure
834 */
835netdev_tx_t gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
836{
837 struct gelic_card *card = netdev_card(netdev);
838 struct gelic_descr *descr;
839 int result;
840 unsigned long flags;
841
842 spin_lock_irqsave(&card->tx_lock, flags);
843
844 gelic_card_release_tx_chain(card, 0);
845
846 descr = gelic_card_get_next_tx_descr(card);
847 if (!descr) {
848 /*
849 * no more descriptors free
850 */
851 gelic_card_stop_queues(card);
852 spin_unlock_irqrestore(&card->tx_lock, flags);
853 return NETDEV_TX_BUSY;
854 }
855
856 result = gelic_descr_prepare_tx(card, descr, skb);
857 if (result) {
858 /*
859 * DMA map failed. As chances are that failure
860 * would continue, just release skb and return
861 */
862 netdev->stats.tx_dropped++;
863 dev_kfree_skb_any(skb);
864 spin_unlock_irqrestore(&card->tx_lock, flags);
865 return NETDEV_TX_OK;
866 }
867 /*
868 * link this prepared descriptor to previous one
869 * to achieve high performance
870 */
871 descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
872 /*
873 * as hardware descriptor is modified in the above lines,
874 * ensure that the hardware sees it
875 */
876 wmb();
877 if (gelic_card_kick_txdma(card, descr)) {
878 /*
879 * kick failed.
880 * release descriptor which was just prepared
881 */
882 netdev->stats.tx_dropped++;
883 /* don't trigger BUG_ON() in gelic_descr_release_tx */
884 descr->data_status = cpu_to_be32(GELIC_DESCR_TX_TAIL);
885 gelic_descr_release_tx(card, descr);
886 /* reset head */
887 card->tx_chain.head = descr;
888 /* reset hw termination */
889 descr->prev->next_descr_addr = 0;
890 dev_info(ctodev(card), "%s: kick failure\n", __func__);
891 }
892
893 spin_unlock_irqrestore(&card->tx_lock, flags);
894 return NETDEV_TX_OK;
895}
896
897/**
898 * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
899 * @descr: descriptor to process
900 * @card: card structure
901 * @netdev: net_device structure to be passed packet
902 *
903 * iommu-unmaps the skb, fills out skb structure and passes the data to the
904 * stack. The descriptor state is not changed.
905 */
906static void gelic_net_pass_skb_up(struct gelic_descr *descr,
907 struct gelic_card *card,
908 struct net_device *netdev)
909
910{
911 struct sk_buff *skb = descr->skb;
912 u32 data_status, data_error;
913
914 data_status = be32_to_cpu(descr->data_status);
915 data_error = be32_to_cpu(descr->data_error);
916 /* unmap skb buffer */
917 dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
918 GELIC_NET_MAX_MTU,
919 DMA_FROM_DEVICE);
920
921 skb_put(skb, be32_to_cpu(descr->valid_size)?
922 be32_to_cpu(descr->valid_size) :
923 be32_to_cpu(descr->result_size));
924 if (!descr->valid_size)
925 dev_info(ctodev(card), "buffer full %x %x %x\n",
926 be32_to_cpu(descr->result_size),
927 be32_to_cpu(descr->buf_size),
928 be32_to_cpu(descr->dmac_cmd_status));
929
930 descr->skb = NULL;
931 /*
932 * the card put 2 bytes vlan tag in front
933 * of the ethernet frame
934 */
935 skb_pull(skb, 2);
936 skb->protocol = eth_type_trans(skb, netdev);
937
938 /* checksum offload */
939 if (netdev->features & NETIF_F_RXCSUM) {
940 if ((data_status & GELIC_DESCR_DATA_STATUS_CHK_MASK) &&
941 (!(data_error & GELIC_DESCR_DATA_ERROR_CHK_MASK)))
942 skb->ip_summed = CHECKSUM_UNNECESSARY;
943 else
944 skb_checksum_none_assert(skb);
945 } else
946 skb_checksum_none_assert(skb);
947
948 /* update netdevice statistics */
949 netdev->stats.rx_packets++;
950 netdev->stats.rx_bytes += skb->len;
951
952 /* pass skb up to stack */
953 netif_receive_skb(skb);
954}
955
956/**
957 * gelic_card_decode_one_descr - processes an rx descriptor
958 * @card: card structure
959 *
960 * returns 1 if a packet has been sent to the stack, otherwise 0
961 *
962 * processes an rx descriptor by iommu-unmapping the data buffer and passing
963 * the packet up to the stack
964 */
965static int gelic_card_decode_one_descr(struct gelic_card *card)
966{
967 enum gelic_descr_dma_status status;
968 struct gelic_descr_chain *chain = &card->rx_chain;
969 struct gelic_descr *descr = chain->head;
970 struct net_device *netdev = NULL;
971 int dmac_chain_ended;
972
973 status = gelic_descr_get_status(descr);
974
975 if (status == GELIC_DESCR_DMA_CARDOWNED)
976 return 0;
977
978 if (status == GELIC_DESCR_DMA_NOT_IN_USE) {
979 dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
980 return 0;
981 }
982
983 /* netdevice select */
984 if (card->vlan_required) {
985 unsigned int i;
986 u16 vid;
987 vid = *(u16 *)(descr->skb->data) & VLAN_VID_MASK;
988 for (i = 0; i < GELIC_PORT_MAX; i++) {
989 if (card->vlan[i].rx == vid) {
990 netdev = card->netdev[i];
991 break;
992 }
993 }
994 if (GELIC_PORT_MAX <= i) {
995 pr_info("%s: unknown packet vid=%x\n", __func__, vid);
996 goto refill;
997 }
998 } else
999 netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1000
1001 if ((status == GELIC_DESCR_DMA_RESPONSE_ERROR) ||
1002 (status == GELIC_DESCR_DMA_PROTECTION_ERROR) ||
1003 (status == GELIC_DESCR_DMA_FORCE_END)) {
1004 dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
1005 status);
1006 netdev->stats.rx_dropped++;
1007 goto refill;
1008 }
1009
1010 if (status == GELIC_DESCR_DMA_BUFFER_FULL) {
1011 /*
1012 * Buffer full would occur if and only if
1013 * the frame length was longer than the size of this
1014 * descriptor's buffer. If the frame length was equal
1015 * to or shorter than buffer'size, FRAME_END condition
1016 * would occur.
1017 * Anyway this frame was longer than the MTU,
1018 * just drop it.
1019 */
1020 dev_info(ctodev(card), "overlength frame\n");
1021 goto refill;
1022 }
1023 /*
1024 * descriptors any other than FRAME_END here should
1025 * be treated as error.
1026 */
1027 if (status != GELIC_DESCR_DMA_FRAME_END) {
1028 dev_dbg(ctodev(card), "RX descriptor with state %x\n",
1029 status);
1030 goto refill;
1031 }
1032
1033 /* ok, we've got a packet in descr */
1034 gelic_net_pass_skb_up(descr, card, netdev);
1035refill:
1036
1037 /* is the current descriptor terminated with next_descr == NULL? */
1038 dmac_chain_ended =
1039 be32_to_cpu(descr->dmac_cmd_status) &
1040 GELIC_DESCR_RX_DMA_CHAIN_END;
1041 /*
1042 * So that always DMAC can see the end
1043 * of the descriptor chain to avoid
1044 * from unwanted DMAC overrun.
1045 */
1046 descr->next_descr_addr = 0;
1047
1048 /* change the descriptor state: */
1049 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
1050
1051 /*
1052 * this call can fail, but for now, just leave this
1053 * descriptor without skb
1054 */
1055 gelic_descr_prepare_rx(card, descr);
1056
1057 chain->tail = descr;
1058 chain->head = descr->next;
1059
1060 /*
1061 * Set this descriptor the end of the chain.
1062 */
1063 descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
1064
1065 /*
1066 * If dmac chain was met, DMAC stopped.
1067 * thus re-enable it
1068 */
1069
1070 if (dmac_chain_ended)
1071 gelic_card_enable_rxdmac(card);
1072
1073 return 1;
1074}
1075
1076/**
1077 * gelic_net_poll - NAPI poll function called by the stack to return packets
1078 * @napi: napi structure
1079 * @budget: number of packets we can pass to the stack at most
1080 *
1081 * returns the number of the processed packets
1082 *
1083 */
1084static int gelic_net_poll(struct napi_struct *napi, int budget)
1085{
1086 struct gelic_card *card = container_of(napi, struct gelic_card, napi);
1087 int packets_done = 0;
1088
1089 while (packets_done < budget) {
1090 if (!gelic_card_decode_one_descr(card))
1091 break;
1092
1093 packets_done++;
1094 }
1095
1096 if (packets_done < budget) {
1097 napi_complete_done(napi, packets_done);
1098 gelic_card_rx_irq_on(card);
1099 }
1100 return packets_done;
1101}
1102
1103/*
1104 * gelic_card_interrupt - event handler for gelic_net
1105 */
1106static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
1107{
1108 unsigned long flags;
1109 struct gelic_card *card = ptr;
1110 u64 status;
1111
1112 status = card->irq_status;
1113
1114 if (!status)
1115 return IRQ_NONE;
1116
1117 status &= card->irq_mask;
1118
1119 if (status & GELIC_CARD_RXINT) {
1120 gelic_card_rx_irq_off(card);
1121 napi_schedule(&card->napi);
1122 }
1123
1124 if (status & GELIC_CARD_TXINT) {
1125 spin_lock_irqsave(&card->tx_lock, flags);
1126 card->tx_dma_progress = 0;
1127 gelic_card_release_tx_chain(card, 0);
1128 /* kick outstanding tx descriptor if any */
1129 gelic_card_kick_txdma(card, card->tx_chain.tail);
1130 spin_unlock_irqrestore(&card->tx_lock, flags);
1131 }
1132
1133 /* ether port status changed */
1134 if (status & GELIC_CARD_PORT_STATUS_CHANGED)
1135 gelic_card_get_ether_port_status(card, 1);
1136
1137#ifdef CONFIG_GELIC_WIRELESS
1138 if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
1139 GELIC_CARD_WLAN_COMMAND_COMPLETED))
1140 gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
1141#endif
1142
1143 return IRQ_HANDLED;
1144}
1145
1146#ifdef CONFIG_NET_POLL_CONTROLLER
1147/**
1148 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1149 * @netdev: interface device structure
1150 *
1151 * see Documentation/networking/netconsole.rst
1152 */
1153void gelic_net_poll_controller(struct net_device *netdev)
1154{
1155 struct gelic_card *card = netdev_card(netdev);
1156
1157 gelic_card_set_irq_mask(card, 0);
1158 gelic_card_interrupt(netdev->irq, netdev);
1159 gelic_card_set_irq_mask(card, card->irq_mask);
1160}
1161#endif /* CONFIG_NET_POLL_CONTROLLER */
1162
1163/**
1164 * gelic_net_open - called upon ifconfig up
1165 * @netdev: interface device structure
1166 *
1167 * returns 0 on success, <0 on failure
1168 *
1169 * gelic_net_open allocates all the descriptors and memory needed for
1170 * operation, sets up multicast list and enables interrupts
1171 */
1172int gelic_net_open(struct net_device *netdev)
1173{
1174 struct gelic_card *card = netdev_card(netdev);
1175
1176 dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
1177
1178 gelic_card_up(card);
1179
1180 netif_start_queue(netdev);
1181 gelic_card_get_ether_port_status(card, 1);
1182
1183 dev_dbg(ctodev(card), " <- %s\n", __func__);
1184 return 0;
1185}
1186
1187void gelic_net_get_drvinfo(struct net_device *netdev,
1188 struct ethtool_drvinfo *info)
1189{
1190 strscpy(info->driver, DRV_NAME, sizeof(info->driver));
1191 strscpy(info->version, DRV_VERSION, sizeof(info->version));
1192}
1193
1194static int gelic_ether_get_link_ksettings(struct net_device *netdev,
1195 struct ethtool_link_ksettings *cmd)
1196{
1197 struct gelic_card *card = netdev_card(netdev);
1198 u32 supported, advertising;
1199
1200 gelic_card_get_ether_port_status(card, 0);
1201
1202 if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
1203 cmd->base.duplex = DUPLEX_FULL;
1204 else
1205 cmd->base.duplex = DUPLEX_HALF;
1206
1207 switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
1208 case GELIC_LV1_ETHER_SPEED_10:
1209 cmd->base.speed = SPEED_10;
1210 break;
1211 case GELIC_LV1_ETHER_SPEED_100:
1212 cmd->base.speed = SPEED_100;
1213 break;
1214 case GELIC_LV1_ETHER_SPEED_1000:
1215 cmd->base.speed = SPEED_1000;
1216 break;
1217 default:
1218 pr_info("%s: speed unknown\n", __func__);
1219 cmd->base.speed = SPEED_10;
1220 break;
1221 }
1222
1223 supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1224 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1225 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1226 SUPPORTED_1000baseT_Full;
1227 advertising = supported;
1228 if (card->link_mode & GELIC_LV1_ETHER_AUTO_NEG) {
1229 cmd->base.autoneg = AUTONEG_ENABLE;
1230 } else {
1231 cmd->base.autoneg = AUTONEG_DISABLE;
1232 advertising &= ~ADVERTISED_Autoneg;
1233 }
1234 cmd->base.port = PORT_TP;
1235
1236 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1237 supported);
1238 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1239 advertising);
1240
1241 return 0;
1242}
1243
1244static int
1245gelic_ether_set_link_ksettings(struct net_device *netdev,
1246 const struct ethtool_link_ksettings *cmd)
1247{
1248 struct gelic_card *card = netdev_card(netdev);
1249 u64 mode;
1250 int ret;
1251
1252 if (cmd->base.autoneg == AUTONEG_ENABLE) {
1253 mode = GELIC_LV1_ETHER_AUTO_NEG;
1254 } else {
1255 switch (cmd->base.speed) {
1256 case SPEED_10:
1257 mode = GELIC_LV1_ETHER_SPEED_10;
1258 break;
1259 case SPEED_100:
1260 mode = GELIC_LV1_ETHER_SPEED_100;
1261 break;
1262 case SPEED_1000:
1263 mode = GELIC_LV1_ETHER_SPEED_1000;
1264 break;
1265 default:
1266 return -EINVAL;
1267 }
1268 if (cmd->base.duplex == DUPLEX_FULL) {
1269 mode |= GELIC_LV1_ETHER_FULL_DUPLEX;
1270 } else if (cmd->base.speed == SPEED_1000) {
1271 pr_info("1000 half duplex is not supported.\n");
1272 return -EINVAL;
1273 }
1274 }
1275
1276 ret = gelic_card_set_link_mode(card, mode);
1277
1278 if (ret)
1279 return ret;
1280
1281 return 0;
1282}
1283
1284static void gelic_net_get_wol(struct net_device *netdev,
1285 struct ethtool_wolinfo *wol)
1286{
1287 if (0 <= ps3_compare_firmware_version(2, 2, 0))
1288 wol->supported = WAKE_MAGIC;
1289 else
1290 wol->supported = 0;
1291
1292 wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
1293 memset(&wol->sopass, 0, sizeof(wol->sopass));
1294}
1295static int gelic_net_set_wol(struct net_device *netdev,
1296 struct ethtool_wolinfo *wol)
1297{
1298 int status;
1299 struct gelic_card *card;
1300 u64 v1, v2;
1301
1302 if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
1303 !capable(CAP_NET_ADMIN))
1304 return -EPERM;
1305
1306 if (wol->wolopts & ~WAKE_MAGIC)
1307 return -EINVAL;
1308
1309 card = netdev_card(netdev);
1310 if (wol->wolopts & WAKE_MAGIC) {
1311 status = lv1_net_control(bus_id(card), dev_id(card),
1312 GELIC_LV1_SET_WOL,
1313 GELIC_LV1_WOL_MAGIC_PACKET,
1314 0, GELIC_LV1_WOL_MP_ENABLE,
1315 &v1, &v2);
1316 if (status) {
1317 pr_info("%s: enabling WOL failed %d\n", __func__,
1318 status);
1319 status = -EIO;
1320 goto done;
1321 }
1322 status = lv1_net_control(bus_id(card), dev_id(card),
1323 GELIC_LV1_SET_WOL,
1324 GELIC_LV1_WOL_ADD_MATCH_ADDR,
1325 0, GELIC_LV1_WOL_MATCH_ALL,
1326 &v1, &v2);
1327 if (!status)
1328 ps3_sys_manager_set_wol(1);
1329 else {
1330 pr_info("%s: enabling WOL filter failed %d\n",
1331 __func__, status);
1332 status = -EIO;
1333 }
1334 } else {
1335 status = lv1_net_control(bus_id(card), dev_id(card),
1336 GELIC_LV1_SET_WOL,
1337 GELIC_LV1_WOL_MAGIC_PACKET,
1338 0, GELIC_LV1_WOL_MP_DISABLE,
1339 &v1, &v2);
1340 if (status) {
1341 pr_info("%s: disabling WOL failed %d\n", __func__,
1342 status);
1343 status = -EIO;
1344 goto done;
1345 }
1346 status = lv1_net_control(bus_id(card), dev_id(card),
1347 GELIC_LV1_SET_WOL,
1348 GELIC_LV1_WOL_DELETE_MATCH_ADDR,
1349 0, GELIC_LV1_WOL_MATCH_ALL,
1350 &v1, &v2);
1351 if (!status)
1352 ps3_sys_manager_set_wol(0);
1353 else {
1354 pr_info("%s: removing WOL filter failed %d\n",
1355 __func__, status);
1356 status = -EIO;
1357 }
1358 }
1359done:
1360 return status;
1361}
1362
1363static const struct ethtool_ops gelic_ether_ethtool_ops = {
1364 .get_drvinfo = gelic_net_get_drvinfo,
1365 .get_link = ethtool_op_get_link,
1366 .get_wol = gelic_net_get_wol,
1367 .set_wol = gelic_net_set_wol,
1368 .get_link_ksettings = gelic_ether_get_link_ksettings,
1369 .set_link_ksettings = gelic_ether_set_link_ksettings,
1370};
1371
1372/**
1373 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1374 * function (to be called not under interrupt status)
1375 * @work: work is context of tx timout task
1376 *
1377 * called as task when tx hangs, resets interface (if interface is up)
1378 */
1379static void gelic_net_tx_timeout_task(struct work_struct *work)
1380{
1381 struct gelic_card *card =
1382 container_of(work, struct gelic_card, tx_timeout_task);
1383 struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1384
1385 dev_info(ctodev(card), "%s:Timed out. Restarting...\n", __func__);
1386
1387 if (!(netdev->flags & IFF_UP))
1388 goto out;
1389
1390 netif_device_detach(netdev);
1391 gelic_net_stop(netdev);
1392
1393 gelic_net_open(netdev);
1394 netif_device_attach(netdev);
1395
1396out:
1397 atomic_dec(&card->tx_timeout_task_counter);
1398}
1399
1400/**
1401 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1402 * @netdev: interface device structure
1403 * @txqueue: unused
1404 *
1405 * called, if tx hangs. Schedules a task that resets the interface
1406 */
1407void gelic_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1408{
1409 struct gelic_card *card;
1410
1411 card = netdev_card(netdev);
1412 atomic_inc(&card->tx_timeout_task_counter);
1413 if (netdev->flags & IFF_UP)
1414 schedule_work(&card->tx_timeout_task);
1415 else
1416 atomic_dec(&card->tx_timeout_task_counter);
1417}
1418
1419static const struct net_device_ops gelic_netdevice_ops = {
1420 .ndo_open = gelic_net_open,
1421 .ndo_stop = gelic_net_stop,
1422 .ndo_start_xmit = gelic_net_xmit,
1423 .ndo_set_rx_mode = gelic_net_set_multi,
1424 .ndo_tx_timeout = gelic_net_tx_timeout,
1425 .ndo_set_mac_address = eth_mac_addr,
1426 .ndo_validate_addr = eth_validate_addr,
1427#ifdef CONFIG_NET_POLL_CONTROLLER
1428 .ndo_poll_controller = gelic_net_poll_controller,
1429#endif
1430};
1431
1432/**
1433 * gelic_ether_setup_netdev_ops - initialization of net_device operations
1434 * @netdev: net_device structure
1435 * @napi: napi structure
1436 *
1437 * fills out function pointers in the net_device structure
1438 */
1439static 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);
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 **/
1459int 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 eth_hw_addr_set(netdev, (u8 *)&v1);
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)
1515static 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
1566static 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 */
1640static 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
1766fail_setup_netdev:
1767fail_alloc_skbs:
1768 gelic_card_free_chain(card, card->rx_chain.head);
1769fail_alloc_rx:
1770 gelic_card_free_chain(card, card->tx_chain.head);
1771fail_alloc_tx:
1772 free_irq(card->irq, card);
1773 netdev->irq = 0;
1774fail_request_irq:
1775 ps3_sb_event_receive_port_destroy(dev, card->irq);
1776fail_alloc_irq:
1777 lv1_net_set_interrupt_status_indicator(bus_id(card),
1778 bus_id(card),
1779 0, 0);
1780fail_status_indicator:
1781 ps3_system_bus_set_drvdata(dev, NULL);
1782 kfree(netdev_card(netdev)->unalign);
1783 free_netdev(netdev);
1784fail_alloc_card:
1785 ps3_dma_region_free(dev->d_region);
1786fail_dma_region:
1787 ps3_close_hv_device(dev);
1788fail_open:
1789 return result;
1790}
1791
1792/*
1793 * ps3_gelic_driver_remove - remove a device from the control of this driver
1794 */
1795
1796static void 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}
1846
1847static struct ps3_system_bus_driver ps3_gelic_driver = {
1848 .match_id = PS3_MATCH_ID_GELIC,
1849 .probe = ps3_gelic_driver_probe,
1850 .remove = ps3_gelic_driver_remove,
1851 .shutdown = ps3_gelic_driver_remove,
1852 .core.name = "ps3_gelic_driver",
1853 .core.owner = THIS_MODULE,
1854};
1855
1856static int __init ps3_gelic_driver_init (void)
1857{
1858 return firmware_has_feature(FW_FEATURE_PS3_LV1)
1859 ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1860 : -ENODEV;
1861}
1862
1863static void __exit ps3_gelic_driver_exit (void)
1864{
1865 ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1866}
1867
1868module_init(ps3_gelic_driver_init);
1869module_exit(ps3_gelic_driver_exit);
1870
1871MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1872