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ps3: removed calling netif_poll_enable() in open()
[deliverable/linux.git] / drivers / net / ps3_gelic_net.c
CommitLineData
02c18891
MM		 1/*
2 * PS3 gelic network driver.
3 *
4 * Copyright (C) 2007 Sony Computer Entertainment Inc.
5 * Copyright 2006, 2007 Sony Corporation
6 *
7 * This file is based on: spider_net.c
8 *
9 * (C) Copyright IBM Corp. 2005
10 *
11 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
12 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29#undef DEBUG
30
31#include <linux/kernel.h>
32#include <linux/module.h>
33
34#include <linux/etherdevice.h>
35#include <linux/ethtool.h>
36#include <linux/if_vlan.h>
37
38#include <linux/in.h>
39#include <linux/ip.h>
40#include <linux/tcp.h>
41
42#include <linux/dma-mapping.h>
43#include <net/checksum.h>
44#include <asm/firmware.h>
45#include <asm/ps3.h>
46#include <asm/lv1call.h>
47
48#include "ps3_gelic_net.h"
49
50#define DRV_NAME "Gelic Network Driver"
51#define DRV_VERSION "1.0"
52
53MODULE_AUTHOR("SCE Inc.");
54MODULE_DESCRIPTION("Gelic Network driver");
55MODULE_LICENSE("GPL");
56
57static inline struct device *ctodev(struct gelic_net_card *card)
58{
59 return &card->dev->core;
60}
61static inline unsigned int bus_id(struct gelic_net_card *card)
62{
63 return card->dev->bus_id;
64}
65static inline unsigned int dev_id(struct gelic_net_card *card)
66{
67 return card->dev->dev_id;
68}
69
70/* set irq_mask */
71static int gelic_net_set_irq_mask(struct gelic_net_card *card, u64 mask)
72{
73 int status;
74
75 status = lv1_net_set_interrupt_mask(bus_id(card), dev_id(card),
76 mask, 0);
77 if (status)
78 dev_info(ctodev(card),
79 "lv1_net_set_interrupt_mask failed %d\n", status);
80 return status;
81}
82static inline void gelic_net_rx_irq_on(struct gelic_net_card *card)
83{
84 gelic_net_set_irq_mask(card, card->ghiintmask | GELIC_NET_RXINT);
85}
86static inline void gelic_net_rx_irq_off(struct gelic_net_card *card)
87{
88 gelic_net_set_irq_mask(card, card->ghiintmask & ~GELIC_NET_RXINT);
89}
90/**
91 * gelic_net_get_descr_status -- returns the status of a descriptor
92 * @descr: descriptor to look at
93 *
94 * returns the status as in the dmac_cmd_status field of the descriptor
95 */
96static enum gelic_net_descr_status
97gelic_net_get_descr_status(struct gelic_net_descr *descr)
98{
99 u32 cmd_status;
100
101 cmd_status = descr->dmac_cmd_status;
102 cmd_status >>= GELIC_NET_DESCR_IND_PROC_SHIFT;
103 return cmd_status;
104}
105
106/**
107 * gelic_net_set_descr_status -- sets the status of a descriptor
108 * @descr: descriptor to change
109 * @status: status to set in the descriptor
110 *
111 * changes the status to the specified value. Doesn't change other bits
112 * in the status
113 */
114static void gelic_net_set_descr_status(struct gelic_net_descr *descr,
115 enum gelic_net_descr_status status)
116{
117 u32 cmd_status;
118
119 /* read the status */
120 cmd_status = descr->dmac_cmd_status;
121 /* clean the upper 4 bits */
122 cmd_status &= GELIC_NET_DESCR_IND_PROC_MASKO;
123 /* add the status to it */
124 cmd_status |= ((u32)status) << GELIC_NET_DESCR_IND_PROC_SHIFT;
125 /* and write it back */
126 descr->dmac_cmd_status = cmd_status;
127 /*
128 * dma_cmd_status field is used to indicate whether the descriptor
129 * is valid or not.
130 * Usually caller of this function wants to inform that to the
131 * hardware, so we assure here the hardware sees the change.
132 */
133 wmb();
134}
135
136/**
137 * gelic_net_free_chain - free descriptor chain
138 * @card: card structure
139 * @descr_in: address of desc
140 */
141static void gelic_net_free_chain(struct gelic_net_card *card,
142 struct gelic_net_descr *descr_in)
143{
144 struct gelic_net_descr *descr;
145
146 for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) {
147 dma_unmap_single(ctodev(card), descr->bus_addr,
148 GELIC_NET_DESCR_SIZE, DMA_BIDIRECTIONAL);
149 descr->bus_addr = 0;
150 }
151}
152
153/**
154 * gelic_net_init_chain - links descriptor chain
155 * @card: card structure
156 * @chain: address of chain
157 * @start_descr: address of descriptor array
158 * @no: number of descriptors
159 *
160 * we manage a circular list that mirrors the hardware structure,
161 * except that the hardware uses bus addresses.
162 *
163 * returns 0 on success, <0 on failure
164 */
165static int gelic_net_init_chain(struct gelic_net_card *card,
166 struct gelic_net_descr_chain *chain,
167 struct gelic_net_descr *start_descr, int no)
168{
169 int i;
170 struct gelic_net_descr *descr;
171
172 descr = start_descr;
173 memset(descr, 0, sizeof(*descr) * no);
174
175 /* set up the hardware pointers in each descriptor */
176 for (i = 0; i < no; i++, descr++) {
177 gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
178 descr->bus_addr =
179 dma_map_single(ctodev(card), descr,
180 GELIC_NET_DESCR_SIZE,
181 DMA_BIDIRECTIONAL);
182
183 if (!descr->bus_addr)
184 goto iommu_error;
185
186 descr->next = descr + 1;
187 descr->prev = descr - 1;
188 }
189 /* make them as ring */
190 (descr - 1)->next = start_descr;
191 start_descr->prev = (descr - 1);
192
193 /* chain bus addr of hw descriptor */
194 descr = start_descr;
195 for (i = 0; i < no; i++, descr++) {
196 descr->next_descr_addr = descr->next->bus_addr;
197 }
198
199 chain->head = start_descr;
200 chain->tail = start_descr;
201
202 /* do not chain last hw descriptor */
203 (descr - 1)->next_descr_addr = 0;
204
205 return 0;
206
207iommu_error:
208 for (i--, descr--; 0 <= i; i--, descr--)
209 if (descr->bus_addr)
210 dma_unmap_single(ctodev(card), descr->bus_addr,
211 GELIC_NET_DESCR_SIZE,
212 DMA_BIDIRECTIONAL);
213 return -ENOMEM;
214}
215
216/**
217 * gelic_net_prepare_rx_descr - reinitializes a rx descriptor
218 * @card: card structure
219 * @descr: descriptor to re-init
220 *
221 * return 0 on succes, <0 on failure
222 *
223 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
224 * Activate the descriptor state-wise
225 */
226static int gelic_net_prepare_rx_descr(struct gelic_net_card *card,
227 struct gelic_net_descr *descr)
228{
229 int offset;
230 unsigned int bufsize;
231
232 if (gelic_net_get_descr_status(descr) != GELIC_NET_DESCR_NOT_IN_USE) {
233 dev_info(ctodev(card), "%s: ERROR status \n", __func__);
234 }
235 /* we need to round up the buffer size to a multiple of 128 */
236 bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN);
237
238 /* and we need to have it 128 byte aligned, therefore we allocate a
239 * bit more */
240 descr->skb = netdev_alloc_skb(card->netdev,
241 bufsize + GELIC_NET_RXBUF_ALIGN - 1);
242 if (!descr->skb) {
243 descr->buf_addr = 0; /* tell DMAC don't touch memory */
244 dev_info(ctodev(card),
245 "%s:allocate skb failed !!\n", __func__);
246 return -ENOMEM;
247 }
248 descr->buf_size = bufsize;
249 descr->dmac_cmd_status = 0;
250 descr->result_size = 0;
251 descr->valid_size = 0;
252 descr->data_error = 0;
253
254 offset = ((unsigned long)descr->skb->data) &
255 (GELIC_NET_RXBUF_ALIGN - 1);
256 if (offset)
257 skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
258 /* io-mmu-map the skb */
259 descr->buf_addr = dma_map_single(ctodev(card), descr->skb->data,
260 GELIC_NET_MAX_MTU,
261 DMA_FROM_DEVICE);
262 if (!descr->buf_addr) {
263 dev_kfree_skb_any(descr->skb);
264 descr->skb = NULL;
265 dev_info(ctodev(card),
266 "%s:Could not iommu-map rx buffer\n", __func__);
267 gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
268 return -ENOMEM;
269 } else {
270 gelic_net_set_descr_status(descr, GELIC_NET_DESCR_CARDOWNED);
271 return 0;
272 }
273}
274
275/**
276 * gelic_net_release_rx_chain - free all skb of rx descr
277 * @card: card structure
278 *
279 */
280static void gelic_net_release_rx_chain(struct gelic_net_card *card)
281{
282 struct gelic_net_descr *descr = card->rx_chain.head;
283
284 do {
285 if (descr->skb) {
286 dma_unmap_single(ctodev(card),
287 descr->buf_addr,
288 descr->skb->len,
289 DMA_FROM_DEVICE);
290 descr->buf_addr = 0;
291 dev_kfree_skb_any(descr->skb);
292 descr->skb = NULL;
ea6992aa
MM		 293 gelic_net_set_descr_status(descr,
294 GELIC_NET_DESCR_NOT_IN_USE);
02c18891
MM		 295 }
296 descr = descr->next;
297 } while (descr != card->rx_chain.head);
298}
299
300/**
301 * gelic_net_fill_rx_chain - fills descriptors/skbs in the rx chains
302 * @card: card structure
303 *
304 * fills all descriptors in the rx chain: allocates skbs
305 * and iommu-maps them.
306 * returns 0 on success, <0 on failure
307 */
308static int gelic_net_fill_rx_chain(struct gelic_net_card *card)
309{
310 struct gelic_net_descr *descr = card->rx_chain.head;
311 int ret;
312
313 do {
314 if (!descr->skb) {
315 ret = gelic_net_prepare_rx_descr(card, descr);
316 if (ret)
317 goto rewind;
318 }
319 descr = descr->next;
320 } while (descr != card->rx_chain.head);
321
322 return 0;
323rewind:
324 gelic_net_release_rx_chain(card);
325 return ret;
326}
327
328/**
329 * gelic_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
330 * @card: card structure
331 *
332 * returns 0 on success, <0 on failure
333 */
334static int gelic_net_alloc_rx_skbs(struct gelic_net_card *card)
335{
336 struct gelic_net_descr_chain *chain;
337 int ret;
338 chain = &card->rx_chain;
339 ret = gelic_net_fill_rx_chain(card);
340 chain->head = card->rx_top->prev; /* point to the last */
341 return ret;
342}
343
344/**
345 * gelic_net_release_tx_descr - processes a used tx descriptor
346 * @card: card structure
347 * @descr: descriptor to release
348 *
349 * releases a used tx descriptor (unmapping, freeing of skb)
350 */
351static void gelic_net_release_tx_descr(struct gelic_net_card *card,
352 struct gelic_net_descr *descr)
353{
354 struct sk_buff *skb;
355
356
357 if (descr->data_status & (1 << GELIC_NET_TXDESC_TAIL)) {
358 /* 2nd descriptor */
359 skb = descr->skb;
360 dma_unmap_single(ctodev(card), descr->buf_addr, skb->len,
361 DMA_TO_DEVICE);
362 dev_kfree_skb_any(skb);
363 } else {
364 dma_unmap_single(ctodev(card), descr->buf_addr,
365 descr->buf_size, DMA_TO_DEVICE);
366 }
367
368 descr->buf_addr = 0;
369 descr->buf_size = 0;
370 descr->next_descr_addr = 0;
371 descr->result_size = 0;
372 descr->valid_size = 0;
373 descr->data_status = 0;
374 descr->data_error = 0;
375 descr->skb = NULL;
376
377 /* set descr status */
ea6992aa 378 gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
02c18891
MM		 379}
380
381/**
382 * gelic_net_release_tx_chain - processes sent tx descriptors
383 * @card: adapter structure
384 * @stop: net_stop sequence
385 *
386 * releases the tx descriptors that gelic has finished with
387 */
388static void gelic_net_release_tx_chain(struct gelic_net_card *card, int stop)
389{
390 struct gelic_net_descr_chain *tx_chain;
391 enum gelic_net_descr_status status;
392 int release = 0;
393
394 for (tx_chain = &card->tx_chain;
395 tx_chain->head != tx_chain->tail && tx_chain->tail;
396 tx_chain->tail = tx_chain->tail->next) {
397 status = gelic_net_get_descr_status(tx_chain->tail);
398 switch (status) {
399 case GELIC_NET_DESCR_RESPONSE_ERROR:
400 case GELIC_NET_DESCR_PROTECTION_ERROR:
401 case GELIC_NET_DESCR_FORCE_END:
402 if (printk_ratelimit())
403 dev_info(ctodev(card),
404 "%s: forcing end of tx descriptor " \
405 "with status %x\n",
406 __func__, status);
92548d60 407 card->netdev->stats.tx_dropped++;
02c18891
MM		 408 break;
409
410 case GELIC_NET_DESCR_COMPLETE:
48544cc2 411 if (tx_chain->tail->skb) {
92548d60
MM		 412 card->netdev->stats.tx_packets++;
413 card->netdev->stats.tx_bytes +=
48544cc2
MM		 414 tx_chain->tail->skb->len;
415 }
02c18891
MM		 416 break;
417
418 case GELIC_NET_DESCR_CARDOWNED:
419 /* pending tx request */
420 default:
421 /* any other value (== GELIC_NET_DESCR_NOT_IN_USE) */
48544cc2
MM		 422 if (!stop)
423 goto out;
02c18891
MM		 424 }
425 gelic_net_release_tx_descr(card, tx_chain->tail);
48544cc2 426 release ++;
02c18891
MM		 427 }
428out:
48544cc2 429 if (!stop && (2 < release))
02c18891
MM		 430 netif_wake_queue(card->netdev);
431}
432
433/**
434 * gelic_net_set_multi - sets multicast addresses and promisc flags
435 * @netdev: interface device structure
436 *
437 * gelic_net_set_multi configures multicast addresses as needed for the
438 * netdev interface. It also sets up multicast, allmulti and promisc
439 * flags appropriately
440 */
441static void gelic_net_set_multi(struct net_device *netdev)
442{
443 struct gelic_net_card *card = netdev_priv(netdev);
444 struct dev_mc_list *mc;
445 unsigned int i;
446 uint8_t *p;
447 u64 addr;
448 int status;
449
450 /* clear all multicast address */
451 status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
452 0, 1);
453 if (status)
454 dev_err(ctodev(card),
455 "lv1_net_remove_multicast_address failed %d\n",
456 status);
457 /* set broadcast address */
458 status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
459 GELIC_NET_BROADCAST_ADDR, 0);
460 if (status)
461 dev_err(ctodev(card),
462 "lv1_net_add_multicast_address failed, %d\n",
463 status);
464
465 if (netdev->flags & IFF_ALLMULTI
466 || netdev->mc_count > GELIC_NET_MC_COUNT_MAX) { /* list max */
467 status = lv1_net_add_multicast_address(bus_id(card),
468 dev_id(card),
469 0, 1);
470 if (status)
471 dev_err(ctodev(card),
472 "lv1_net_add_multicast_address failed, %d\n",
473 status);
474 return;
475 }
476
477 /* set multicast address */
478 for (mc = netdev->mc_list; mc; mc = mc->next) {
479 addr = 0;
480 p = mc->dmi_addr;
481 for (i = 0; i < ETH_ALEN; i++) {
482 addr <<= 8;
483 addr |= *p++;
484 }
485 status = lv1_net_add_multicast_address(bus_id(card),
486 dev_id(card),
487 addr, 0);
488 if (status)
489 dev_err(ctodev(card),
490 "lv1_net_add_multicast_address failed, %d\n",
491 status);
492 }
493}
494
495/**
496 * gelic_net_enable_rxdmac - enables the receive DMA controller
497 * @card: card structure
498 *
499 * gelic_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
500 * in the GDADMACCNTR register
501 */
502static inline void gelic_net_enable_rxdmac(struct gelic_net_card *card)
503{
504 int status;
505
506 status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
507 card->rx_chain.tail->bus_addr, 0);
508 if (status)
509 dev_info(ctodev(card),
510 "lv1_net_start_rx_dma failed, status=%d\n", status);
511}
512
513/**
514 * gelic_net_disable_rxdmac - disables the receive DMA controller
515 * @card: card structure
516 *
517 * gelic_net_disable_rxdmac terminates processing on the DMA controller by
518 * turing off DMA and issueing a force end
519 */
520static inline void gelic_net_disable_rxdmac(struct gelic_net_card *card)
521{
522 int status;
523
524 /* this hvc blocks until the DMA in progress really stopped */
525 status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card), 0);
526 if (status)
527 dev_err(ctodev(card),
528 "lv1_net_stop_rx_dma faild, %d\n", status);
529}
530
531/**
532 * gelic_net_disable_txdmac - disables the transmit DMA controller
533 * @card: card structure
534 *
535 * gelic_net_disable_txdmac terminates processing on the DMA controller by
536 * turing off DMA and issueing a force end
537 */
538static inline void gelic_net_disable_txdmac(struct gelic_net_card *card)
539{
540 int status;
541
542 /* this hvc blocks until the DMA in progress really stopped */
543 status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card), 0);
544 if (status)
545 dev_err(ctodev(card),
546 "lv1_net_stop_tx_dma faild, status=%d\n", status);
547}
548
549/**
550 * gelic_net_stop - called upon ifconfig down
551 * @netdev: interface device structure
552 *
553 * always returns 0
554 */
555static int gelic_net_stop(struct net_device *netdev)
556{
557 struct gelic_net_card *card = netdev_priv(netdev);
558
559 netif_poll_disable(netdev);
560 netif_stop_queue(netdev);
561
562 /* turn off DMA, force end */
563 gelic_net_disable_rxdmac(card);
564 gelic_net_disable_txdmac(card);
565
566 gelic_net_set_irq_mask(card, 0);
567
568 /* disconnect event port */
569 free_irq(card->netdev->irq, card->netdev);
570 ps3_sb_event_receive_port_destroy(card->dev, card->netdev->irq);
571 card->netdev->irq = NO_IRQ;
572
573 netif_carrier_off(netdev);
574
575 /* release chains */
576 gelic_net_release_tx_chain(card, 1);
577 gelic_net_release_rx_chain(card);
578
579 gelic_net_free_chain(card, card->tx_top);
580 gelic_net_free_chain(card, card->rx_top);
581
582 return 0;
583}
584
585/**
586 * gelic_net_get_next_tx_descr - returns the next available tx descriptor
587 * @card: device structure to get descriptor from
588 *
589 * returns the address of the next descriptor, or NULL if not available.
590 */
591static struct gelic_net_descr *
592gelic_net_get_next_tx_descr(struct gelic_net_card *card)
593{
594 if (!card->tx_chain.head)
595 return NULL;
596 /* see if we can two consecutive free descrs */
597 if (card->tx_chain.tail != card->tx_chain.head->next &&
598 gelic_net_get_descr_status(card->tx_chain.head) ==
599 GELIC_NET_DESCR_NOT_IN_USE &&
600 card->tx_chain.tail != card->tx_chain.head->next->next &&
601 gelic_net_get_descr_status(card->tx_chain.head->next) ==
602 GELIC_NET_DESCR_NOT_IN_USE )
603 return card->tx_chain.head;
604 else
605 return NULL;
606
607}
608
609/**
610 * gelic_net_set_txdescr_cmdstat - sets the tx descriptor command field
611 * @descr: descriptor structure to fill out
612 * @skb: packet to consider
613 * @middle: middle of frame
614 *
615 * fills out the command and status field of the descriptor structure,
616 * depending on hardware checksum settings. This function assumes a wmb()
617 * has executed before.
618 */
619static void gelic_net_set_txdescr_cmdstat(struct gelic_net_descr *descr,
620 struct sk_buff *skb, int middle)
621{
622 u32 eofr;
623
624 if (middle)
625 eofr = 0;
626 else
627 eofr = GELIC_NET_DMAC_CMDSTAT_END_FRAME;
628
629 if (skb->ip_summed != CHECKSUM_PARTIAL)
630 descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOCS | eofr;
631 else {
632 /* is packet ip?
633 * if yes: tcp? udp? */
634 if (skb->protocol == htons(ETH_P_IP)) {
635 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
636 descr->dmac_cmd_status =
637 GELIC_NET_DMAC_CMDSTAT_TCPCS | eofr;
638 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
639 descr->dmac_cmd_status =
640 GELIC_NET_DMAC_CMDSTAT_UDPCS | eofr;
641 else /*
642 * the stack should checksum non-tcp and non-udp
643 * packets on his own: NETIF_F_IP_CSUM
644 */
645 descr->dmac_cmd_status =
646 GELIC_NET_DMAC_CMDSTAT_NOCS | eofr;
647 }
648 }
649}
650
651/**
652 * gelic_net_prepare_tx_descr_v - get dma address of skb_data
653 * @card: card structure
654 * @descr: descriptor structure
655 * @skb: packet to use
656 *
657 * returns 0 on success, <0 on failure.
658 *
659 */
660static int gelic_net_prepare_tx_descr_v(struct gelic_net_card *card,
661 struct gelic_net_descr *descr,
662 struct sk_buff *skb)
663{
664 dma_addr_t buf[2];
665 unsigned int vlan_len;
48544cc2 666 struct gelic_net_descr *sec_descr = descr->next;
02c18891
MM		 667
668 if (skb->len < GELIC_NET_VLAN_POS)
669 return -EINVAL;
670
48544cc2
MM		 671 vlan_len = GELIC_NET_VLAN_POS;
672 memcpy(&descr->vlan, skb->data, vlan_len);
02c18891 673 if (card->vlan_index != -1) {
48544cc2 674 /* internal vlan tag used */
02c18891
MM		 675 descr->vlan.h_vlan_proto = htons(ETH_P_8021Q); /* vlan 0x8100*/
676 descr->vlan.h_vlan_TCI = htons(card->vlan_id[card->vlan_index]);
48544cc2
MM		 677 vlan_len += VLAN_HLEN; /* added for above two lines */
678 }
02c18891 679
48544cc2 680 /* map data area */
02c18891
MM		 681 buf[0] = dma_map_single(ctodev(card), &descr->vlan,
682 vlan_len, DMA_TO_DEVICE);
683
684 if (!buf[0]) {
685 dev_err(ctodev(card),
686 "dma map 1 failed (%p, %i). Dropping packet\n",
687 skb->data, vlan_len);
688 return -ENOMEM;
689 }
690
02c18891
MM		 691 buf[1] = dma_map_single(ctodev(card), skb->data + GELIC_NET_VLAN_POS,
692 skb->len - GELIC_NET_VLAN_POS,
693 DMA_TO_DEVICE);
694
695 if (!buf[1]) {
696 dev_err(ctodev(card),
697 "dma map 2 failed (%p, %i). Dropping packet\n",
698 skb->data + GELIC_NET_VLAN_POS,
699 skb->len - GELIC_NET_VLAN_POS);
700 dma_unmap_single(ctodev(card), buf[0], vlan_len,
701 DMA_TO_DEVICE);
702 return -ENOMEM;
703 }
704
48544cc2
MM		 705 /* first descr */
706 descr->buf_addr = buf[0];
707 descr->buf_size = vlan_len;
708 descr->skb = NULL; /* not used */
02c18891 709 descr->data_status = 0;
48544cc2
MM		 710 descr->next_descr_addr = descr->next->bus_addr;
711 gelic_net_set_txdescr_cmdstat(descr, skb, 1); /* not the frame end */
02c18891 712
48544cc2
MM		 713 /* second descr */
714 sec_descr->buf_addr = buf[1];
715 sec_descr->buf_size = skb->len - GELIC_NET_VLAN_POS;
716 sec_descr->skb = skb;
717 sec_descr->data_status = 0;
718 sec_descr->next_descr_addr = 0; /* terminate hw descr */
719 gelic_net_set_txdescr_cmdstat(sec_descr, skb, 0);
720
721 /* bump free descriptor pointer */
722 card->tx_chain.head = sec_descr->next;
02c18891
MM		 723 return 0;
724}
725
726/**
727 * gelic_net_kick_txdma - enables TX DMA processing
728 * @card: card structure
729 * @descr: descriptor address to enable TX processing at
730 *
731 */
732static int gelic_net_kick_txdma(struct gelic_net_card *card,
733 struct gelic_net_descr *descr)
734{
48544cc2 735 int status = 0;
02c18891
MM		 736 int count = 10;
737
738 if (card->tx_dma_progress)
739 return 0;
740
741 if (gelic_net_get_descr_status(descr) == GELIC_NET_DESCR_CARDOWNED) {
742 card->tx_dma_progress = 1;
743 /* sometimes we need retry here */
744 while (count--) {
745 status = lv1_net_start_tx_dma(bus_id(card),
746 dev_id(card),
747 descr->bus_addr, 0);
748 if (!status)
749 break;
750 }
751 if (!count)
752 dev_info(ctodev(card), "lv1_net_start_txdma failed," \
753 "status=%d %#lx\n",
754 status, card->irq_status);
755 }
756 return status;
757}
758
759/**
760 * gelic_net_xmit - transmits a frame over the device
761 * @skb: packet to send out
762 * @netdev: interface device structure
763 *
764 * returns 0 on success, <0 on failure
765 */
766static int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
767{
768 struct gelic_net_card *card = netdev_priv(netdev);
48544cc2 769 struct gelic_net_descr *descr;
02c18891
MM		 770 int result;
771 unsigned long flags;
772
773 spin_lock_irqsave(&card->tx_dma_lock, flags);
774
775 gelic_net_release_tx_chain(card, 0);
48544cc2 776
02c18891
MM		 777 descr = gelic_net_get_next_tx_descr(card);
778 if (!descr) {
48544cc2
MM		 779 /*
780 * no more descriptors free
781 */
02c18891
MM		 782 netif_stop_queue(netdev);
783 spin_unlock_irqrestore(&card->tx_dma_lock, flags);
784 return NETDEV_TX_BUSY;
785 }
02c18891 786
48544cc2
MM		 787 result = gelic_net_prepare_tx_descr_v(card, descr, skb);
788 if (result) {
789 /*
790 * DMA map failed. As chanses are that failure
791 * would continue, just release skb and return
792 */
92548d60 793 card->netdev->stats.tx_dropped++;
48544cc2
MM		 794 dev_kfree_skb_any(skb);
795 spin_unlock_irqrestore(&card->tx_dma_lock, flags);
796 return NETDEV_TX_OK;
797 }
798 /*
799 * link this prepared descriptor to previous one
800 * to achieve high performance
801 */
802 descr->prev->next_descr_addr = descr->bus_addr;
02c18891
MM		 803 /*
804 * as hardware descriptor is modified in the above lines,
805 * ensure that the hardware sees it
806 */
807 wmb();
48544cc2
MM		 808 if (gelic_net_kick_txdma(card, descr)) {
809 /*
810 * kick failed.
811 * release descriptors which were just prepared
812 */
92548d60 813 card->netdev->stats.tx_dropped++;
48544cc2
MM		 814 gelic_net_release_tx_descr(card, descr);
815 gelic_net_release_tx_descr(card, descr->next);
816 card->tx_chain.tail = descr->next->next;
817 dev_info(ctodev(card), "%s: kick failure\n", __func__);
818 } else {
819 /* OK, DMA started/reserved */
820 netdev->trans_start = jiffies;
821 }
02c18891 822
02c18891
MM		 823 spin_unlock_irqrestore(&card->tx_dma_lock, flags);
824 return NETDEV_TX_OK;
02c18891
MM		 825}
826
827/**
828 * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
829 * @descr: descriptor to process
830 * @card: card structure
831 *
832 * iommu-unmaps the skb, fills out skb structure and passes the data to the
833 * stack. The descriptor state is not changed.
834 */
835static void gelic_net_pass_skb_up(struct gelic_net_descr *descr,
836 struct gelic_net_card *card)
837{
838 struct sk_buff *skb;
839 struct net_device *netdev;
840 u32 data_status, data_error;
841
842 data_status = descr->data_status;
843 data_error = descr->data_error;
844 netdev = card->netdev;
845 /* unmap skb buffer */
846 skb = descr->skb;
847 dma_unmap_single(ctodev(card), descr->buf_addr, GELIC_NET_MAX_MTU,
848 DMA_FROM_DEVICE);
849
850 skb_put(skb, descr->valid_size? descr->valid_size : descr->result_size);
851 if (!descr->valid_size)
852 dev_info(ctodev(card), "buffer full %x %x %x\n",
853 descr->result_size, descr->buf_size,
854 descr->dmac_cmd_status);
855
856 descr->skb = NULL;
857 /*
858 * the card put 2 bytes vlan tag in front
859 * of the ethernet frame
860 */
861 skb_pull(skb, 2);
862 skb->protocol = eth_type_trans(skb, netdev);
863
864 /* checksum offload */
865 if (card->rx_csum) {
866 if ((data_status & GELIC_NET_DATA_STATUS_CHK_MASK) &&
867 (!(data_error & GELIC_NET_DATA_ERROR_CHK_MASK)))
868 skb->ip_summed = CHECKSUM_UNNECESSARY;
869 else
870 skb->ip_summed = CHECKSUM_NONE;
871 } else
872 skb->ip_summed = CHECKSUM_NONE;
873
874 /* update netdevice statistics */
92548d60
MM		 875 card->netdev->stats.rx_packets++;
876 card->netdev->stats.rx_bytes += skb->len;
02c18891
MM		 877
878 /* pass skb up to stack */
879 netif_receive_skb(skb);
880}
881
882/**
883 * gelic_net_decode_one_descr - processes an rx descriptor
884 * @card: card structure
885 *
886 * returns 1 if a packet has been sent to the stack, otherwise 0
887 *
888 * processes an rx descriptor by iommu-unmapping the data buffer and passing
889 * the packet up to the stack
890 */
891static int gelic_net_decode_one_descr(struct gelic_net_card *card)
892{
893 enum gelic_net_descr_status status;
894 struct gelic_net_descr_chain *chain = &card->rx_chain;
895 struct gelic_net_descr *descr = chain->tail;
896 int dmac_chain_ended;
897
898 status = gelic_net_get_descr_status(descr);
899 /* is this descriptor terminated with next_descr == NULL? */
900 dmac_chain_ended =
901 descr->dmac_cmd_status & GELIC_NET_DMAC_CMDSTAT_RXDCEIS;
902
903 if (status == GELIC_NET_DESCR_CARDOWNED)
904 return 0;
905
906 if (status == GELIC_NET_DESCR_NOT_IN_USE) {
907 dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
908 return 0;
909 }
910
911 if ((status == GELIC_NET_DESCR_RESPONSE_ERROR) ||
912 (status == GELIC_NET_DESCR_PROTECTION_ERROR) ||
913 (status == GELIC_NET_DESCR_FORCE_END)) {
914 dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
915 status);
92548d60 916 card->netdev->stats.rx_dropped++;
02c18891
MM		 917 goto refill;
918 }
919
920 if ((status != GELIC_NET_DESCR_COMPLETE) &&
921 (status != GELIC_NET_DESCR_FRAME_END)) {
922 dev_dbg(ctodev(card), "RX descriptor with state %x\n",
923 status);
924 goto refill;
925 }
926
927 /* ok, we've got a packet in descr */
928 gelic_net_pass_skb_up(descr, card); /* 1: skb_up sccess */
929
930refill:
931 descr->next_descr_addr = 0; /* unlink the descr */
932
933 /* change the descriptor state: */
934 gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
935
936 /* refill one desc
937 * FIXME: this can fail, but for now, just leave this
938 * descriptor without skb
939 */
940 gelic_net_prepare_rx_descr(card, descr);
941 chain->head = descr;
942 chain->tail = descr->next;
943 descr->prev->next_descr_addr = descr->bus_addr;
944
945 if (dmac_chain_ended) {
946 gelic_net_enable_rxdmac(card);
947 dev_dbg(ctodev(card), "reenable rx dma\n");
948 }
949
950 return 1;
951}
952
953/**
954 * gelic_net_poll - NAPI poll function called by the stack to return packets
955 * @netdev: interface device structure
956 * @budget: number of packets we can pass to the stack at most
957 *
958 * returns 0 if no more packets available to the driver/stack. Returns 1,
959 * if the quota is exceeded, but the driver has still packets.
960 *
961 */
962static int gelic_net_poll(struct net_device *netdev, int *budget)
963{
964 struct gelic_net_card *card = netdev_priv(netdev);
965 int packets_to_do, packets_done = 0;
966 int no_more_packets = 0;
967
968 packets_to_do = min(*budget, netdev->quota);
969
970 while (packets_to_do) {
971 if (gelic_net_decode_one_descr(card)) {
972 packets_done++;
973 packets_to_do--;
974 } else {
975 /* no more packets for the stack */
976 no_more_packets = 1;
977 break;
978 }
979 }
980 netdev->quota -= packets_done;
981 *budget -= packets_done;
982 if (no_more_packets) {
983 netif_rx_complete(netdev);
984 gelic_net_rx_irq_on(card);
985 return 0;
986 } else
987 return 1;
988}
02c18891
MM		 989/**
990 * gelic_net_change_mtu - changes the MTU of an interface
991 * @netdev: interface device structure
992 * @new_mtu: new MTU value
993 *
994 * returns 0 on success, <0 on failure
995 */
996static int gelic_net_change_mtu(struct net_device *netdev, int new_mtu)
997{
998 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
999 * and mtu is outbound only anyway */
1000 if ((new_mtu < GELIC_NET_MIN_MTU) ||
1001 (new_mtu > GELIC_NET_MAX_MTU)) {
1002 return -EINVAL;
1003 }
1004 netdev->mtu = new_mtu;
1005 return 0;
1006}
1007
1008/**
1009 * gelic_net_interrupt - event handler for gelic_net
1010 */
1011static irqreturn_t gelic_net_interrupt(int irq, void *ptr)
1012{
1013 unsigned long flags;
1014 struct net_device *netdev = ptr;
1015 struct gelic_net_card *card = netdev_priv(netdev);
1016 u64 status;
1017
1018 status = card->irq_status;
1019
1020 if (!status)
1021 return IRQ_NONE;
1022
1023 if (status & GELIC_NET_RXINT) {
1024 gelic_net_rx_irq_off(card);
1025 netif_rx_schedule(netdev);
1026 }
1027
1028 if (status & GELIC_NET_TXINT) {
1029 spin_lock_irqsave(&card->tx_dma_lock, flags);
1030 card->tx_dma_progress = 0;
48544cc2
MM		 1031 gelic_net_release_tx_chain(card, 0);
1032 /* kick outstanding tx descriptor if any */
1033 gelic_net_kick_txdma(card, card->tx_chain.tail);
02c18891 1034 spin_unlock_irqrestore(&card->tx_dma_lock, flags);
02c18891
MM		 1035 }
1036 return IRQ_HANDLED;
1037}
1038
1039#ifdef CONFIG_NET_POLL_CONTROLLER
1040/**
1041 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1042 * @netdev: interface device structure
1043 *
1044 * see Documentation/networking/netconsole.txt
1045 */
1046static void gelic_net_poll_controller(struct net_device *netdev)
1047{
1048 struct gelic_net_card *card = netdev_priv(netdev);
1049
1050 gelic_net_set_irq_mask(card, 0);
1051 gelic_net_interrupt(netdev->irq, netdev);
1052 gelic_net_set_irq_mask(card, card->ghiintmask);
1053}
1054#endif /* CONFIG_NET_POLL_CONTROLLER */
1055
1056/**
1057 * gelic_net_open_device - open device and map dma region
1058 * @card: card structure
1059 */
1060static int gelic_net_open_device(struct gelic_net_card *card)
1061{
1062 int result;
1063
1064 result = ps3_sb_event_receive_port_setup(card->dev, PS3_BINDING_CPU_ANY,
1065 &card->netdev->irq);
1066
1067 if (result) {
1068 dev_info(ctodev(card),
1069 "%s:%d: gelic_net_open_device failed (%d)\n",
1070 __func__, __LINE__, result);
1071 result = -EPERM;
1072 goto fail_alloc_irq;
1073 }
1074
1075 result = request_irq(card->netdev->irq, gelic_net_interrupt,
f0861f82 1076 IRQF_DISABLED, card->netdev->name, card->netdev);
02c18891
MM		 1077
1078 if (result) {
1079 dev_info(ctodev(card), "%s:%d: request_irq failed (%d)\n",
1080 __func__, __LINE__, result);
1081 goto fail_request_irq;
1082 }
1083
1084 return 0;
1085
1086fail_request_irq:
1087 ps3_sb_event_receive_port_destroy(card->dev, card->netdev->irq);
1088 card->netdev->irq = NO_IRQ;
1089fail_alloc_irq:
1090 return result;
1091}
1092
1093
1094/**
1095 * gelic_net_open - called upon ifonfig up
1096 * @netdev: interface device structure
1097 *
1098 * returns 0 on success, <0 on failure
1099 *
1100 * gelic_net_open allocates all the descriptors and memory needed for
1101 * operation, sets up multicast list and enables interrupts
1102 */
1103static int gelic_net_open(struct net_device *netdev)
1104{
1105 struct gelic_net_card *card = netdev_priv(netdev);
1106
1107 dev_dbg(ctodev(card), " -> %s:%d\n", __func__, __LINE__);
1108
1109 gelic_net_open_device(card);
1110
1111 if (gelic_net_init_chain(card, &card->tx_chain,
1112 card->descr, GELIC_NET_TX_DESCRIPTORS))
1113 goto alloc_tx_failed;
1114 if (gelic_net_init_chain(card, &card->rx_chain,
9f6c9a8c 1115 card->descr + GELIC_NET_TX_DESCRIPTORS,
02c18891
MM		 1116 GELIC_NET_RX_DESCRIPTORS))
1117 goto alloc_rx_failed;
1118
1119 /* head of chain */
1120 card->tx_top = card->tx_chain.head;
1121 card->rx_top = card->rx_chain.head;
1122 dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
1123 card->rx_top, card->tx_top, sizeof(struct gelic_net_descr),
1124 GELIC_NET_RX_DESCRIPTORS);
1125 /* allocate rx skbs */
1126 if (gelic_net_alloc_rx_skbs(card))
1127 goto alloc_skbs_failed;
1128
1129 card->tx_dma_progress = 0;
1130 card->ghiintmask = GELIC_NET_RXINT | GELIC_NET_TXINT;
1131
1132 gelic_net_set_irq_mask(card, card->ghiintmask);
1133 gelic_net_enable_rxdmac(card);
1134
1135 netif_start_queue(netdev);
1136 netif_carrier_on(netdev);
02c18891
MM		 1137
1138 return 0;
1139
1140alloc_skbs_failed:
1141 gelic_net_free_chain(card, card->rx_top);
1142alloc_rx_failed:
1143 gelic_net_free_chain(card, card->tx_top);
1144alloc_tx_failed:
1145 return -ENOMEM;
1146}
1147
02c18891
MM		 1148static void gelic_net_get_drvinfo (struct net_device *netdev,
1149 struct ethtool_drvinfo *info)
1150{
1151 strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1);
1152 strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1);
1153}
1154
1155static int gelic_net_get_settings(struct net_device *netdev,
1156 struct ethtool_cmd *cmd)
1157{
1158 struct gelic_net_card *card = netdev_priv(netdev);
1159 int status;
1160 u64 v1, v2;
1161 int speed, duplex;
1162
1163 speed = duplex = -1;
1164 status = lv1_net_control(bus_id(card), dev_id(card),
1165 GELIC_NET_GET_ETH_PORT_STATUS, GELIC_NET_PORT, 0, 0,
1166 &v1, &v2);
1167 if (status) {
1168 /* link down */
1169 } else {
1170 if (v1 & GELIC_NET_FULL_DUPLEX) {
1171 duplex = DUPLEX_FULL;
1172 } else {
1173 duplex = DUPLEX_HALF;
1174 }
1175
1176 if (v1 & GELIC_NET_SPEED_10 ) {
1177 speed = SPEED_10;
1178 } else if (v1 & GELIC_NET_SPEED_100) {
1179 speed = SPEED_100;
1180 } else if (v1 & GELIC_NET_SPEED_1000) {
1181 speed = SPEED_1000;
1182 }
1183 }
1184 cmd->supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1185 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1186 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1187 SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full;
1188 cmd->advertising = cmd->supported;
1189 cmd->speed = speed;
1190 cmd->duplex = duplex;
1191 cmd->autoneg = AUTONEG_ENABLE; /* always enabled */
1192 cmd->port = PORT_TP;
1193
1194 return 0;
1195}
1196
1197static u32 gelic_net_get_link(struct net_device *netdev)
1198{
1199 struct gelic_net_card *card = netdev_priv(netdev);
1200 int status;
1201 u64 v1, v2;
1202 int link;
1203
1204 status = lv1_net_control(bus_id(card), dev_id(card),
1205 GELIC_NET_GET_ETH_PORT_STATUS, GELIC_NET_PORT, 0, 0,
1206 &v1, &v2);
1207 if (status)
1208 return 0; /* link down */
1209
1210 if (v1 & GELIC_NET_LINK_UP)
1211 link = 1;
1212 else
1213 link = 0;
1214
1215 return link;
1216}
1217
1218static int gelic_net_nway_reset(struct net_device *netdev)
1219{
1220 if (netif_running(netdev)) {
1221 gelic_net_stop(netdev);
1222 gelic_net_open(netdev);
1223 }
1224 return 0;
1225}
1226
1227static u32 gelic_net_get_tx_csum(struct net_device *netdev)
1228{
1229 return (netdev->features & NETIF_F_IP_CSUM) != 0;
1230}
1231
1232static int gelic_net_set_tx_csum(struct net_device *netdev, u32 data)
1233{
1234 if (data)
1235 netdev->features |= NETIF_F_IP_CSUM;
1236 else
1237 netdev->features &= ~NETIF_F_IP_CSUM;
1238
1239 return 0;
1240}
1241
1242static u32 gelic_net_get_rx_csum(struct net_device *netdev)
1243{
1244 struct gelic_net_card *card = netdev_priv(netdev);
1245
1246 return card->rx_csum;
1247}
1248
1249static int gelic_net_set_rx_csum(struct net_device *netdev, u32 data)
1250{
1251 struct gelic_net_card *card = netdev_priv(netdev);
1252
1253 card->rx_csum = data;
1254 return 0;
1255}
1256
1257static struct ethtool_ops gelic_net_ethtool_ops = {
1258 .get_drvinfo = gelic_net_get_drvinfo,
1259 .get_settings = gelic_net_get_settings,
1260 .get_link = gelic_net_get_link,
1261 .nway_reset = gelic_net_nway_reset,
1262 .get_tx_csum = gelic_net_get_tx_csum,
1263 .set_tx_csum = gelic_net_set_tx_csum,
1264 .get_rx_csum = gelic_net_get_rx_csum,
1265 .set_rx_csum = gelic_net_set_rx_csum,
1266};
02c18891
MM		 1267
1268/**
1269 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1270 * function (to be called not under interrupt status)
1271 * @work: work is context of tx timout task
1272 *
1273 * called as task when tx hangs, resets interface (if interface is up)
1274 */
1275static void gelic_net_tx_timeout_task(struct work_struct *work)
1276{
1277 struct gelic_net_card *card =
1278 container_of(work, struct gelic_net_card, tx_timeout_task);
1279 struct net_device *netdev = card->netdev;
1280
1281 dev_info(ctodev(card), "%s:Timed out. Restarting... \n", __func__);
1282
1283 if (!(netdev->flags & IFF_UP))
1284 goto out;
1285
1286 netif_device_detach(netdev);
1287 gelic_net_stop(netdev);
1288
1289 gelic_net_open(netdev);
1290 netif_device_attach(netdev);
1291
1292out:
1293 atomic_dec(&card->tx_timeout_task_counter);
1294}
1295
1296/**
1297 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1298 * @netdev: interface device structure
1299 *
1300 * called, if tx hangs. Schedules a task that resets the interface
1301 */
1302static void gelic_net_tx_timeout(struct net_device *netdev)
1303{
1304 struct gelic_net_card *card;
1305
1306 card = netdev_priv(netdev);
1307 atomic_inc(&card->tx_timeout_task_counter);
1308 if (netdev->flags & IFF_UP)
1309 schedule_work(&card->tx_timeout_task);
1310 else
1311 atomic_dec(&card->tx_timeout_task_counter);
1312}
1313
1314/**
1315 * gelic_net_setup_netdev_ops - initialization of net_device operations
1316 * @netdev: net_device structure
1317 *
1318 * fills out function pointers in the net_device structure
1319 */
1320static void gelic_net_setup_netdev_ops(struct net_device *netdev)
1321{
1322 netdev->open = &gelic_net_open;
1323 netdev->stop = &gelic_net_stop;
1324 netdev->hard_start_xmit = &gelic_net_xmit;
02c18891
MM		 1325 netdev->set_multicast_list = &gelic_net_set_multi;
1326 netdev->change_mtu = &gelic_net_change_mtu;
1327 /* tx watchdog */
1328 netdev->tx_timeout = &gelic_net_tx_timeout;
1329 netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
1330 /* NAPI */
1331 netdev->poll = &gelic_net_poll;
1332 netdev->weight = GELIC_NET_NAPI_WEIGHT;
02c18891 1333 netdev->ethtool_ops = &gelic_net_ethtool_ops;
02c18891
MM		 1334}
1335
1336/**
1337 * gelic_net_setup_netdev - initialization of net_device
1338 * @card: card structure
1339 *
1340 * Returns 0 on success or <0 on failure
1341 *
1342 * gelic_net_setup_netdev initializes the net_device structure
1343 **/
1344static int gelic_net_setup_netdev(struct gelic_net_card *card)
1345{
1346 struct net_device *netdev = card->netdev;
1347 struct sockaddr addr;
1348 unsigned int i;
1349 int status;
1350 u64 v1, v2;
1351
1352 SET_MODULE_OWNER(netdev);
1353 SET_NETDEV_DEV(netdev, &card->dev->core);
1354 spin_lock_init(&card->tx_dma_lock);
1355
1356 card->rx_csum = GELIC_NET_RX_CSUM_DEFAULT;
1357
1358 gelic_net_setup_netdev_ops(netdev);
1359
1360 netdev->features = NETIF_F_IP_CSUM;
1361
1362 status = lv1_net_control(bus_id(card), dev_id(card),
1363 GELIC_NET_GET_MAC_ADDRESS,
1364 0, 0, 0, &v1, &v2);
1365 if (status || !is_valid_ether_addr((u8 *)&v1)) {
1366 dev_info(ctodev(card),
1367 "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
1368 __func__, status);
1369 return -EINVAL;
1370 }
1371 v1 <<= 16;
1372 memcpy(addr.sa_data, &v1, ETH_ALEN);
1373 memcpy(netdev->dev_addr, addr.sa_data, ETH_ALEN);
1374 dev_info(ctodev(card), "MAC addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1375 netdev->dev_addr[0], netdev->dev_addr[1],
1376 netdev->dev_addr[2], netdev->dev_addr[3],
1377 netdev->dev_addr[4], netdev->dev_addr[5]);
1378
1379 card->vlan_index = -1; /* no vlan */
1380 for (i = 0; i < GELIC_NET_VLAN_MAX; i++) {
1381 status = lv1_net_control(bus_id(card), dev_id(card),
1382 GELIC_NET_GET_VLAN_ID,
1383 i + 1, /* index; one based */
1384 0, 0, &v1, &v2);
1385 if (status == GELIC_NET_VLAN_NO_ENTRY) {
1386 dev_dbg(ctodev(card),
1387 "GELIC_VLAN_ID no entry:%d, VLAN disabled\n",
1388 status);
1389 card->vlan_id[i] = 0;
1390 } else if (status) {
1391 dev_dbg(ctodev(card),
1392 "%s:GELIC_NET_VLAN_ID faild, status=%d\n",
1393 __func__, status);
1394 card->vlan_id[i] = 0;
1395 } else {
1396 card->vlan_id[i] = (u32)v1;
1397 dev_dbg(ctodev(card), "vlan_id:%d, %lx\n", i, v1);
1398 }
1399 }
1400 if (card->vlan_id[GELIC_NET_VLAN_WIRED - 1])
1401 card->vlan_index = GELIC_NET_VLAN_WIRED - 1;
1402
1403 status = register_netdev(netdev);
1404 if (status) {
1405 dev_err(ctodev(card), "%s:Couldn't register net_device: %d\n",
1406 __func__, status);
1407 return status;
1408 }
1409
1410 return 0;
1411}
1412
1413/**
1414 * gelic_net_alloc_card - allocates net_device and card structure
1415 *
1416 * returns the card structure or NULL in case of errors
1417 *
1418 * the card and net_device structures are linked to each other
1419 */
1420static struct gelic_net_card *gelic_net_alloc_card(void)
1421{
1422 struct net_device *netdev;
1423 struct gelic_net_card *card;
1424 size_t alloc_size;
1425
1426 alloc_size = sizeof (*card) +
1427 sizeof (struct gelic_net_descr) * GELIC_NET_RX_DESCRIPTORS +
1428 sizeof (struct gelic_net_descr) * GELIC_NET_TX_DESCRIPTORS;
1429 /*
1430 * we assume private data is allocated 32 bytes (or more) aligned
1431 * so that gelic_net_descr should be 32 bytes aligned.
1432 * Current alloc_etherdev() does do it because NETDEV_ALIGN
1433 * is 32.
1434 * check this assumption here.
1435 */
1436 BUILD_BUG_ON(NETDEV_ALIGN < 32);
1437 BUILD_BUG_ON(offsetof(struct gelic_net_card, irq_status) % 8);
1438 BUILD_BUG_ON(offsetof(struct gelic_net_card, descr) % 32);
1439
1440 netdev = alloc_etherdev(alloc_size);
1441 if (!netdev)
1442 return NULL;
1443
1444 card = netdev_priv(netdev);
1445 card->netdev = netdev;
1446 INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
1447 init_waitqueue_head(&card->waitq);
1448 atomic_set(&card->tx_timeout_task_counter, 0);
1449
1450 return card;
1451}
1452
1453/**
1454 * ps3_gelic_driver_probe - add a device to the control of this driver
1455 */
1456static int ps3_gelic_driver_probe (struct ps3_system_bus_device *dev)
1457{
1458 struct gelic_net_card *card = gelic_net_alloc_card();
1459 int result;
1460
1461 if (!card) {
1462 dev_info(&dev->core, "gelic_net_alloc_card failed\n");
1463 result = -ENOMEM;
1464 goto fail_alloc_card;
1465 }
1466
1467 ps3_system_bus_set_driver_data(dev, card);
1468 card->dev = dev;
1469
1470 result = ps3_open_hv_device(dev);
1471
1472 if (result) {
1473 dev_dbg(&dev->core, "ps3_open_hv_device failed\n");
1474 goto fail_open;
1475 }
1476
1477 result = ps3_dma_region_create(dev->d_region);
1478
1479 if (result) {
1480 dev_dbg(&dev->core, "ps3_dma_region_create failed(%d)\n",
1481 result);
1482 BUG_ON("check region type");
1483 goto fail_dma_region;
1484 }
1485
1486 result = lv1_net_set_interrupt_status_indicator(bus_id(card),
1487 dev_id(card),
1488 ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
1489 0);
1490
1491 if (result) {
1492 dev_dbg(&dev->core,
1493 "lv1_net_set_interrupt_status_indicator failed: %s\n",
1494 ps3_result(result));
1495 result = -EIO;
1496 goto fail_status_indicator;
1497 }
1498
1499 result = gelic_net_setup_netdev(card);
1500
1501 if (result) {
1502 dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
1503 "(%d)\n", __func__, __LINE__, result);
1504 goto fail_setup_netdev;
1505 }
1506
1507 return 0;
1508
1509fail_setup_netdev:
1510 lv1_net_set_interrupt_status_indicator(bus_id(card),
1511 bus_id(card),
1512 0 , 0);
1513fail_status_indicator:
1514 ps3_dma_region_free(dev->d_region);
1515fail_dma_region:
1516 ps3_close_hv_device(dev);
1517fail_open:
1518 ps3_system_bus_set_driver_data(dev, NULL);
1519 free_netdev(card->netdev);
1520fail_alloc_card:
1521 return result;
1522}
1523
1524/**
1525 * ps3_gelic_driver_remove - remove a device from the control of this driver
1526 */
1527
1528static int ps3_gelic_driver_remove (struct ps3_system_bus_device *dev)
1529{
1530 struct gelic_net_card *card = ps3_system_bus_get_driver_data(dev);
1531
1532 wait_event(card->waitq,
1533 atomic_read(&card->tx_timeout_task_counter) == 0);
1534
1535 lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
1536 0 , 0);
1537
1538 unregister_netdev(card->netdev);
1539 free_netdev(card->netdev);
1540
1541 ps3_system_bus_set_driver_data(dev, NULL);
1542
1543 ps3_dma_region_free(dev->d_region);
1544
1545 ps3_close_hv_device(dev);
1546
1547 return 0;
1548}
1549
1550static struct ps3_system_bus_driver ps3_gelic_driver = {
1551 .match_id = PS3_MATCH_ID_GELIC,
1552 .probe = ps3_gelic_driver_probe,
1553 .remove = ps3_gelic_driver_remove,
1554 .shutdown = ps3_gelic_driver_remove,
1555 .core.name = "ps3_gelic_driver",
1556 .core.owner = THIS_MODULE,
1557};
1558
1559static int __init ps3_gelic_driver_init (void)
1560{
1561 return firmware_has_feature(FW_FEATURE_PS3_LV1)
1562 ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1563 : -ENODEV;
1564}
1565
1566static void __exit ps3_gelic_driver_exit (void)
1567{
1568 ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1569}
1570
1571module_init (ps3_gelic_driver_init);
1572module_exit (ps3_gelic_driver_exit);
1573
1574MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1575
Linux kernel - Deliverables
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