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authorMasakazu Mokuno <mokuno@sm.sony.co.jp>2007-07-05 07:11:16 -0400
committerJeff Garzik <jeff@garzik.org>2007-07-10 14:13:46 -0400
commit02c1889166b47b9ade309a8f4b7c4ddf0489d869 (patch)
treeeaaa0827b57dea6cd7945019b3f73b600f582654 /drivers
parentdef47c5095d53814512bb0c62ec02dfdec769db1 (diff)
ps3: gigabit ethernet driver for PS3, take3
Hi, This is the third submission of the network driver for PS3. The differences from the previous one are: - renamed source file names so that their prefix can match with the module name - added cbe-oss-dev@ozlabs.org line for MAINTAINER file - changed some in copyright comments If there are no more comments, please apply for 2.6.23. Thank you -- Subject: PS3: Ethernet driver From: Masakazu Mokuno <mokuno@sm.sony.co.jp> Add Gigabit Ethernet support for the PS3 game console. The module will be called ps3_gelic. CC: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Masakazu Mokuno <mokuno@sm.sony.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/Kconfig10
-rw-r--r--drivers/net/Makefile2
-rw-r--r--drivers/net/ps3_gelic_net.c1576
-rw-r--r--drivers/net/ps3_gelic_net.h239
4 files changed, 1827 insertions, 0 deletions
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index a64c2fb8ac28..ec846842c480 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2200,6 +2200,16 @@ config TSI108_ETH
2200 To compile this driver as a module, choose M here: the module 2200 To compile this driver as a module, choose M here: the module
2201 will be called tsi108_eth. 2201 will be called tsi108_eth.
2202 2202
2203config GELIC_NET
2204 tristate "PS3 Gigabit Ethernet driver"
2205 depends on PPC_PS3
2206 help
2207 This driver supports the network device on the PS3 game
2208 console. This driver has built-in support for Ethernet.
2209
2210 To compile this driver as a module, choose M here: the
2211 module will be called ps3_gelic.
2212
2203config GIANFAR 2213config GIANFAR
2204 tristate "Gianfar Ethernet" 2214 tristate "Gianfar Ethernet"
2205 depends on 85xx || 83xx || PPC_86xx 2215 depends on 85xx || 83xx || PPC_86xx
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 77bd8222ab44..1bbcbedad04a 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -60,6 +60,8 @@ obj-$(CONFIG_TIGON3) += tg3.o
60obj-$(CONFIG_BNX2) += bnx2.o 60obj-$(CONFIG_BNX2) += bnx2.o
61spidernet-y += spider_net.o spider_net_ethtool.o 61spidernet-y += spider_net.o spider_net_ethtool.o
62obj-$(CONFIG_SPIDER_NET) += spidernet.o sungem_phy.o 62obj-$(CONFIG_SPIDER_NET) += spidernet.o sungem_phy.o
63obj-$(CONFIG_GELIC_NET) += ps3_gelic.o
64ps3_gelic-objs += ps3_gelic_net.o
63obj-$(CONFIG_TC35815) += tc35815.o 65obj-$(CONFIG_TC35815) += tc35815.o
64obj-$(CONFIG_SKGE) += skge.o 66obj-$(CONFIG_SKGE) += skge.o
65obj-$(CONFIG_SKY2) += sky2.o 67obj-$(CONFIG_SKY2) += sky2.o
diff --git a/drivers/net/ps3_gelic_net.c b/drivers/net/ps3_gelic_net.c
new file mode 100644
index 000000000000..08d25066f051
--- /dev/null
+++ b/drivers/net/ps3_gelic_net.c
@@ -0,0 +1,1576 @@
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;
293 descr->dmac_cmd_status = GELIC_NET_DESCR_NOT_IN_USE;
294 }
295 descr = descr->next;
296 } while (descr != card->rx_chain.head);
297}
298
299/**
300 * gelic_net_fill_rx_chain - fills descriptors/skbs in the rx chains
301 * @card: card structure
302 *
303 * fills all descriptors in the rx chain: allocates skbs
304 * and iommu-maps them.
305 * returns 0 on success, <0 on failure
306 */
307static int gelic_net_fill_rx_chain(struct gelic_net_card *card)
308{
309 struct gelic_net_descr *descr = card->rx_chain.head;
310 int ret;
311
312 do {
313 if (!descr->skb) {
314 ret = gelic_net_prepare_rx_descr(card, descr);
315 if (ret)
316 goto rewind;
317 }
318 descr = descr->next;
319 } while (descr != card->rx_chain.head);
320
321 return 0;
322rewind:
323 gelic_net_release_rx_chain(card);
324 return ret;
325}
326
327/**
328 * gelic_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
329 * @card: card structure
330 *
331 * returns 0 on success, <0 on failure
332 */
333static int gelic_net_alloc_rx_skbs(struct gelic_net_card *card)
334{
335 struct gelic_net_descr_chain *chain;
336 int ret;
337 chain = &card->rx_chain;
338 ret = gelic_net_fill_rx_chain(card);
339 chain->head = card->rx_top->prev; /* point to the last */
340 return ret;
341}
342
343/**
344 * gelic_net_release_tx_descr - processes a used tx descriptor
345 * @card: card structure
346 * @descr: descriptor to release
347 *
348 * releases a used tx descriptor (unmapping, freeing of skb)
349 */
350static void gelic_net_release_tx_descr(struct gelic_net_card *card,
351 struct gelic_net_descr *descr)
352{
353 struct sk_buff *skb;
354
355
356 if (descr->data_status & (1 << GELIC_NET_TXDESC_TAIL)) {
357 /* 2nd descriptor */
358 skb = descr->skb;
359 dma_unmap_single(ctodev(card), descr->buf_addr, skb->len,
360 DMA_TO_DEVICE);
361 dev_kfree_skb_any(skb);
362 } else {
363 dma_unmap_single(ctodev(card), descr->buf_addr,
364 descr->buf_size, DMA_TO_DEVICE);
365 }
366
367 descr->buf_addr = 0;
368 descr->buf_size = 0;
369 descr->next_descr_addr = 0;
370 descr->result_size = 0;
371 descr->valid_size = 0;
372 descr->data_status = 0;
373 descr->data_error = 0;
374 descr->skb = NULL;
375
376 /* set descr status */
377 descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOT_IN_USE;
378}
379
380/**
381 * gelic_net_release_tx_chain - processes sent tx descriptors
382 * @card: adapter structure
383 * @stop: net_stop sequence
384 *
385 * releases the tx descriptors that gelic has finished with
386 */
387static void gelic_net_release_tx_chain(struct gelic_net_card *card, int stop)
388{
389 struct gelic_net_descr_chain *tx_chain;
390 enum gelic_net_descr_status status;
391 int release = 0;
392
393 for (tx_chain = &card->tx_chain;
394 tx_chain->head != tx_chain->tail && tx_chain->tail;
395 tx_chain->tail = tx_chain->tail->next) {
396 status = gelic_net_get_descr_status(tx_chain->tail);
397 switch (status) {
398 case GELIC_NET_DESCR_RESPONSE_ERROR:
399 case GELIC_NET_DESCR_PROTECTION_ERROR:
400 case GELIC_NET_DESCR_FORCE_END:
401 if (printk_ratelimit())
402 dev_info(ctodev(card),
403 "%s: forcing end of tx descriptor " \
404 "with status %x\n",
405 __func__, status);
406 card->netdev_stats.tx_dropped++;
407 break;
408
409 case GELIC_NET_DESCR_COMPLETE:
410 card->netdev_stats.tx_packets++;
411 card->netdev_stats.tx_bytes +=
412 tx_chain->tail->skb->len;
413 break;
414
415 case GELIC_NET_DESCR_CARDOWNED:
416 /* pending tx request */
417 default:
418 /* any other value (== GELIC_NET_DESCR_NOT_IN_USE) */
419 goto out;
420 }
421 gelic_net_release_tx_descr(card, tx_chain->tail);
422 release = 1;
423 }
424out:
425 if (!stop && release)
426 netif_wake_queue(card->netdev);
427}
428
429/**
430 * gelic_net_set_multi - sets multicast addresses and promisc flags
431 * @netdev: interface device structure
432 *
433 * gelic_net_set_multi configures multicast addresses as needed for the
434 * netdev interface. It also sets up multicast, allmulti and promisc
435 * flags appropriately
436 */
437static void gelic_net_set_multi(struct net_device *netdev)
438{
439 struct gelic_net_card *card = netdev_priv(netdev);
440 struct dev_mc_list *mc;
441 unsigned int i;
442 uint8_t *p;
443 u64 addr;
444 int status;
445
446 /* clear all multicast address */
447 status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
448 0, 1);
449 if (status)
450 dev_err(ctodev(card),
451 "lv1_net_remove_multicast_address failed %d\n",
452 status);
453 /* set broadcast address */
454 status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
455 GELIC_NET_BROADCAST_ADDR, 0);
456 if (status)
457 dev_err(ctodev(card),
458 "lv1_net_add_multicast_address failed, %d\n",
459 status);
460
461 if (netdev->flags & IFF_ALLMULTI
462 || netdev->mc_count > GELIC_NET_MC_COUNT_MAX) { /* list max */
463 status = lv1_net_add_multicast_address(bus_id(card),
464 dev_id(card),
465 0, 1);
466 if (status)
467 dev_err(ctodev(card),
468 "lv1_net_add_multicast_address failed, %d\n",
469 status);
470 return;
471 }
472
473 /* set multicast address */
474 for (mc = netdev->mc_list; mc; mc = mc->next) {
475 addr = 0;
476 p = mc->dmi_addr;
477 for (i = 0; i < ETH_ALEN; i++) {
478 addr <<= 8;
479 addr |= *p++;
480 }
481 status = lv1_net_add_multicast_address(bus_id(card),
482 dev_id(card),
483 addr, 0);
484 if (status)
485 dev_err(ctodev(card),
486 "lv1_net_add_multicast_address failed, %d\n",
487 status);
488 }
489}
490
491/**
492 * gelic_net_enable_rxdmac - enables the receive DMA controller
493 * @card: card structure
494 *
495 * gelic_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
496 * in the GDADMACCNTR register
497 */
498static inline void gelic_net_enable_rxdmac(struct gelic_net_card *card)
499{
500 int status;
501
502 status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
503 card->rx_chain.tail->bus_addr, 0);
504 if (status)
505 dev_info(ctodev(card),
506 "lv1_net_start_rx_dma failed, status=%d\n", status);
507}
508
509/**
510 * gelic_net_disable_rxdmac - disables the receive DMA controller
511 * @card: card structure
512 *
513 * gelic_net_disable_rxdmac terminates processing on the DMA controller by
514 * turing off DMA and issueing a force end
515 */
516static inline void gelic_net_disable_rxdmac(struct gelic_net_card *card)
517{
518 int status;
519
520 /* this hvc blocks until the DMA in progress really stopped */
521 status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card), 0);
522 if (status)
523 dev_err(ctodev(card),
524 "lv1_net_stop_rx_dma faild, %d\n", status);
525}
526
527/**
528 * gelic_net_disable_txdmac - disables the transmit DMA controller
529 * @card: card structure
530 *
531 * gelic_net_disable_txdmac terminates processing on the DMA controller by
532 * turing off DMA and issueing a force end
533 */
534static inline void gelic_net_disable_txdmac(struct gelic_net_card *card)
535{
536 int status;
537
538 /* this hvc blocks until the DMA in progress really stopped */
539 status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card), 0);
540 if (status)
541 dev_err(ctodev(card),
542 "lv1_net_stop_tx_dma faild, status=%d\n", status);
543}
544
545/**
546 * gelic_net_stop - called upon ifconfig down
547 * @netdev: interface device structure
548 *
549 * always returns 0
550 */
551static int gelic_net_stop(struct net_device *netdev)
552{
553 struct gelic_net_card *card = netdev_priv(netdev);
554
555 netif_poll_disable(netdev);
556 netif_stop_queue(netdev);
557
558 /* turn off DMA, force end */
559 gelic_net_disable_rxdmac(card);
560 gelic_net_disable_txdmac(card);
561
562 gelic_net_set_irq_mask(card, 0);
563
564 /* disconnect event port */
565 free_irq(card->netdev->irq, card->netdev);
566 ps3_sb_event_receive_port_destroy(card->dev, card->netdev->irq);
567 card->netdev->irq = NO_IRQ;
568
569 netif_carrier_off(netdev);
570
571 /* release chains */
572 gelic_net_release_tx_chain(card, 1);
573 gelic_net_release_rx_chain(card);
574
575 gelic_net_free_chain(card, card->tx_top);
576 gelic_net_free_chain(card, card->rx_top);
577
578 return 0;
579}
580
581/**
582 * gelic_net_get_next_tx_descr - returns the next available tx descriptor
583 * @card: device structure to get descriptor from
584 *
585 * returns the address of the next descriptor, or NULL if not available.
586 */
587static struct gelic_net_descr *
588gelic_net_get_next_tx_descr(struct gelic_net_card *card)
589{
590 if (!card->tx_chain.head)
591 return NULL;
592 /* see if we can two consecutive free descrs */
593 if (card->tx_chain.tail != card->tx_chain.head->next &&
594 gelic_net_get_descr_status(card->tx_chain.head) ==
595 GELIC_NET_DESCR_NOT_IN_USE &&
596 card->tx_chain.tail != card->tx_chain.head->next->next &&
597 gelic_net_get_descr_status(card->tx_chain.head->next) ==
598 GELIC_NET_DESCR_NOT_IN_USE )
599 return card->tx_chain.head;
600 else
601 return NULL;
602
603}
604
605/**
606 * gelic_net_set_txdescr_cmdstat - sets the tx descriptor command field
607 * @descr: descriptor structure to fill out
608 * @skb: packet to consider
609 * @middle: middle of frame
610 *
611 * fills out the command and status field of the descriptor structure,
612 * depending on hardware checksum settings. This function assumes a wmb()
613 * has executed before.
614 */
615static void gelic_net_set_txdescr_cmdstat(struct gelic_net_descr *descr,
616 struct sk_buff *skb, int middle)
617{
618 u32 eofr;
619
620 if (middle)
621 eofr = 0;
622 else
623 eofr = GELIC_NET_DMAC_CMDSTAT_END_FRAME;
624
625 if (skb->ip_summed != CHECKSUM_PARTIAL)
626 descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOCS | eofr;
627 else {
628 /* is packet ip?
629 * if yes: tcp? udp? */
630 if (skb->protocol == htons(ETH_P_IP)) {
631 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
632 descr->dmac_cmd_status =
633 GELIC_NET_DMAC_CMDSTAT_TCPCS | eofr;
634 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
635 descr->dmac_cmd_status =
636 GELIC_NET_DMAC_CMDSTAT_UDPCS | eofr;
637 else /*
638 * the stack should checksum non-tcp and non-udp
639 * packets on his own: NETIF_F_IP_CSUM
640 */
641 descr->dmac_cmd_status =
642 GELIC_NET_DMAC_CMDSTAT_NOCS | eofr;
643 }
644 }
645}
646
647/**
648 * gelic_net_prepare_tx_descr_v - get dma address of skb_data
649 * @card: card structure
650 * @descr: descriptor structure
651 * @skb: packet to use
652 *
653 * returns 0 on success, <0 on failure.
654 *
655 */
656static int gelic_net_prepare_tx_descr_v(struct gelic_net_card *card,
657 struct gelic_net_descr *descr,
658 struct sk_buff *skb)
659{
660 dma_addr_t buf[2];
661 unsigned int vlan_len;
662
663 if (skb->len < GELIC_NET_VLAN_POS)
664 return -EINVAL;
665
666 memcpy(&descr->vlan, skb->data, GELIC_NET_VLAN_POS);
667 if (card->vlan_index != -1) {
668 descr->vlan.h_vlan_proto = htons(ETH_P_8021Q); /* vlan 0x8100*/
669 descr->vlan.h_vlan_TCI = htons(card->vlan_id[card->vlan_index]);
670 vlan_len = GELIC_NET_VLAN_POS + VLAN_HLEN; /* VLAN_HLEN=4 */
671 } else
672 vlan_len = GELIC_NET_VLAN_POS; /* no vlan tag */
673
674 /* first descr */
675 buf[0] = dma_map_single(ctodev(card), &descr->vlan,
676 vlan_len, DMA_TO_DEVICE);
677
678 if (!buf[0]) {
679 dev_err(ctodev(card),
680 "dma map 1 failed (%p, %i). Dropping packet\n",
681 skb->data, vlan_len);
682 return -ENOMEM;
683 }
684
685 descr->buf_addr = buf[0];
686 descr->buf_size = vlan_len;
687 descr->skb = skb; /* not used */
688 descr->data_status = 0;
689 gelic_net_set_txdescr_cmdstat(descr, skb, 1); /* not the frame end */
690
691 /* second descr */
692 card->tx_chain.head = card->tx_chain.head->next;
693 descr->next_descr_addr = descr->next->bus_addr;
694 descr = descr->next;
695 if (gelic_net_get_descr_status(descr) != GELIC_NET_DESCR_NOT_IN_USE)
696 /* XXX will be removed */
697 dev_err(ctodev(card), "descr is not free!\n");
698
699 buf[1] = dma_map_single(ctodev(card), skb->data + GELIC_NET_VLAN_POS,
700 skb->len - GELIC_NET_VLAN_POS,
701 DMA_TO_DEVICE);
702
703 if (!buf[1]) {
704 dev_err(ctodev(card),
705 "dma map 2 failed (%p, %i). Dropping packet\n",
706 skb->data + GELIC_NET_VLAN_POS,
707 skb->len - GELIC_NET_VLAN_POS);
708 dma_unmap_single(ctodev(card), buf[0], vlan_len,
709 DMA_TO_DEVICE);
710 return -ENOMEM;
711 }
712
713 descr->buf_addr = buf[1];
714 descr->buf_size = skb->len - GELIC_NET_VLAN_POS;
715 descr->skb = skb;
716 descr->data_status = 0;
717 descr->next_descr_addr = 0; /* terminate hw descr */
718 gelic_net_set_txdescr_cmdstat(descr, skb, 0);
719
720 return 0;
721}
722
723/**
724 * gelic_net_kick_txdma - enables TX DMA processing
725 * @card: card structure
726 * @descr: descriptor address to enable TX processing at
727 *
728 */
729static int gelic_net_kick_txdma(struct gelic_net_card *card,
730 struct gelic_net_descr *descr)
731{
732 int status = -ENXIO;
733 int count = 10;
734
735 if (card->tx_dma_progress)
736 return 0;
737
738 if (gelic_net_get_descr_status(descr) == GELIC_NET_DESCR_CARDOWNED) {
739 card->tx_dma_progress = 1;
740 /* sometimes we need retry here */
741 while (count--) {
742 status = lv1_net_start_tx_dma(bus_id(card),
743 dev_id(card),
744 descr->bus_addr, 0);
745 if (!status)
746 break;
747 }
748 if (!count)
749 dev_info(ctodev(card), "lv1_net_start_txdma failed," \
750 "status=%d %#lx\n",
751 status, card->irq_status);
752 }
753 return status;
754}
755
756/**
757 * gelic_net_xmit - transmits a frame over the device
758 * @skb: packet to send out
759 * @netdev: interface device structure
760 *
761 * returns 0 on success, <0 on failure
762 */
763static int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
764{
765 struct gelic_net_card *card = netdev_priv(netdev);
766 struct gelic_net_descr *descr = NULL;
767 int result;
768 unsigned long flags;
769
770 spin_lock_irqsave(&card->tx_dma_lock, flags);
771
772 gelic_net_release_tx_chain(card, 0);
773 if (!skb)
774 goto kick;
775 descr = gelic_net_get_next_tx_descr(card);
776 if (!descr) {
777 netif_stop_queue(netdev);
778 spin_unlock_irqrestore(&card->tx_dma_lock, flags);
779 return NETDEV_TX_BUSY;
780 }
781 result = gelic_net_prepare_tx_descr_v(card, descr, skb);
782
783 if (result)
784 goto error;
785
786 card->tx_chain.head = card->tx_chain.head->next;
787
788 if (descr->prev)
789 descr->prev->next_descr_addr = descr->bus_addr;
790kick:
791 /*
792 * as hardware descriptor is modified in the above lines,
793 * ensure that the hardware sees it
794 */
795 wmb();
796 if (gelic_net_kick_txdma(card, card->tx_chain.tail))
797 goto error;
798
799 netdev->trans_start = jiffies;
800 spin_unlock_irqrestore(&card->tx_dma_lock, flags);
801 return NETDEV_TX_OK;
802
803error:
804 card->netdev_stats.tx_dropped++;
805 spin_unlock_irqrestore(&card->tx_dma_lock, flags);
806 return NETDEV_TX_LOCKED;
807}
808
809/**
810 * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
811 * @descr: descriptor to process
812 * @card: card structure
813 *
814 * iommu-unmaps the skb, fills out skb structure and passes the data to the
815 * stack. The descriptor state is not changed.
816 */
817static void gelic_net_pass_skb_up(struct gelic_net_descr *descr,
818 struct gelic_net_card *card)
819{
820 struct sk_buff *skb;
821 struct net_device *netdev;
822 u32 data_status, data_error;
823
824 data_status = descr->data_status;
825 data_error = descr->data_error;
826 netdev = card->netdev;
827 /* unmap skb buffer */
828 skb = descr->skb;
829 dma_unmap_single(ctodev(card), descr->buf_addr, GELIC_NET_MAX_MTU,
830 DMA_FROM_DEVICE);
831
832 skb_put(skb, descr->valid_size? descr->valid_size : descr->result_size);
833 if (!descr->valid_size)
834 dev_info(ctodev(card), "buffer full %x %x %x\n",
835 descr->result_size, descr->buf_size,
836 descr->dmac_cmd_status);
837
838 descr->skb = NULL;
839 /*
840 * the card put 2 bytes vlan tag in front
841 * of the ethernet frame
842 */
843 skb_pull(skb, 2);
844 skb->protocol = eth_type_trans(skb, netdev);
845
846 /* checksum offload */
847 if (card->rx_csum) {
848 if ((data_status & GELIC_NET_DATA_STATUS_CHK_MASK) &&
849 (!(data_error & GELIC_NET_DATA_ERROR_CHK_MASK)))
850 skb->ip_summed = CHECKSUM_UNNECESSARY;
851 else
852 skb->ip_summed = CHECKSUM_NONE;
853 } else
854 skb->ip_summed = CHECKSUM_NONE;
855
856 /* update netdevice statistics */
857 card->netdev_stats.rx_packets++;
858 card->netdev_stats.rx_bytes += skb->len;
859
860 /* pass skb up to stack */
861 netif_receive_skb(skb);
862}
863
864/**
865 * gelic_net_decode_one_descr - processes an rx descriptor
866 * @card: card structure
867 *
868 * returns 1 if a packet has been sent to the stack, otherwise 0
869 *
870 * processes an rx descriptor by iommu-unmapping the data buffer and passing
871 * the packet up to the stack
872 */
873static int gelic_net_decode_one_descr(struct gelic_net_card *card)
874{
875 enum gelic_net_descr_status status;
876 struct gelic_net_descr_chain *chain = &card->rx_chain;
877 struct gelic_net_descr *descr = chain->tail;
878 int dmac_chain_ended;
879
880 status = gelic_net_get_descr_status(descr);
881 /* is this descriptor terminated with next_descr == NULL? */
882 dmac_chain_ended =
883 descr->dmac_cmd_status & GELIC_NET_DMAC_CMDSTAT_RXDCEIS;
884
885 if (status == GELIC_NET_DESCR_CARDOWNED)
886 return 0;
887
888 if (status == GELIC_NET_DESCR_NOT_IN_USE) {
889 dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
890 return 0;
891 }
892
893 if ((status == GELIC_NET_DESCR_RESPONSE_ERROR) ||
894 (status == GELIC_NET_DESCR_PROTECTION_ERROR) ||
895 (status == GELIC_NET_DESCR_FORCE_END)) {
896 dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
897 status);
898 card->netdev_stats.rx_dropped++;
899 goto refill;
900 }
901
902 if ((status != GELIC_NET_DESCR_COMPLETE) &&
903 (status != GELIC_NET_DESCR_FRAME_END)) {
904 dev_dbg(ctodev(card), "RX descriptor with state %x\n",
905 status);
906 goto refill;
907 }
908
909 /* ok, we've got a packet in descr */
910 gelic_net_pass_skb_up(descr, card); /* 1: skb_up sccess */
911
912refill:
913 descr->next_descr_addr = 0; /* unlink the descr */
914
915 /* change the descriptor state: */
916 gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
917
918 /* refill one desc
919 * FIXME: this can fail, but for now, just leave this
920 * descriptor without skb
921 */
922 gelic_net_prepare_rx_descr(card, descr);
923 chain->head = descr;
924 chain->tail = descr->next;
925 descr->prev->next_descr_addr = descr->bus_addr;
926
927 if (dmac_chain_ended) {
928 gelic_net_enable_rxdmac(card);
929 dev_dbg(ctodev(card), "reenable rx dma\n");
930 }
931
932 return 1;
933}
934
935/**
936 * gelic_net_poll - NAPI poll function called by the stack to return packets
937 * @netdev: interface device structure
938 * @budget: number of packets we can pass to the stack at most
939 *
940 * returns 0 if no more packets available to the driver/stack. Returns 1,
941 * if the quota is exceeded, but the driver has still packets.
942 *
943 */
944static int gelic_net_poll(struct net_device *netdev, int *budget)
945{
946 struct gelic_net_card *card = netdev_priv(netdev);
947 int packets_to_do, packets_done = 0;
948 int no_more_packets = 0;
949
950 packets_to_do = min(*budget, netdev->quota);
951
952 while (packets_to_do) {
953 if (gelic_net_decode_one_descr(card)) {
954 packets_done++;
955 packets_to_do--;
956 } else {
957 /* no more packets for the stack */
958 no_more_packets = 1;
959 break;
960 }
961 }
962 netdev->quota -= packets_done;
963 *budget -= packets_done;
964 if (no_more_packets) {
965 netif_rx_complete(netdev);
966 gelic_net_rx_irq_on(card);
967 return 0;
968 } else
969 return 1;
970}
971
972/**
973 * gelic_net_get_stats - get interface statistics
974 * @netdev: interface device structure
975 *
976 * returns the interface statistics residing in the gelic_net_card struct
977 */
978static struct net_device_stats *gelic_net_get_stats(struct net_device *netdev)
979{
980 struct gelic_net_card *card = netdev_priv(netdev);
981
982 return &card->netdev_stats;
983}
984
985/**
986 * gelic_net_change_mtu - changes the MTU of an interface
987 * @netdev: interface device structure
988 * @new_mtu: new MTU value
989 *
990 * returns 0 on success, <0 on failure
991 */
992static int gelic_net_change_mtu(struct net_device *netdev, int new_mtu)
993{
994 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
995 * and mtu is outbound only anyway */
996 if ((new_mtu < GELIC_NET_MIN_MTU) ||
997 (new_mtu > GELIC_NET_MAX_MTU)) {
998 return -EINVAL;
999 }
1000 netdev->mtu = new_mtu;
1001 return 0;
1002}
1003
1004/**
1005 * gelic_net_interrupt - event handler for gelic_net
1006 */
1007static irqreturn_t gelic_net_interrupt(int irq, void *ptr)
1008{
1009 unsigned long flags;
1010 struct net_device *netdev = ptr;
1011 struct gelic_net_card *card = netdev_priv(netdev);
1012 u64 status;
1013
1014 status = card->irq_status;
1015
1016 if (!status)
1017 return IRQ_NONE;
1018
1019 if (status & GELIC_NET_RXINT) {
1020 gelic_net_rx_irq_off(card);
1021 netif_rx_schedule(netdev);
1022 }
1023
1024 if (status & GELIC_NET_TXINT) {
1025 spin_lock_irqsave(&card->tx_dma_lock, flags);
1026 card->tx_dma_progress = 0;
1027 spin_unlock_irqrestore(&card->tx_dma_lock, flags);
1028 /* start pending DMA */
1029 gelic_net_xmit(NULL, netdev);
1030 }
1031 return IRQ_HANDLED;
1032}
1033
1034#ifdef CONFIG_NET_POLL_CONTROLLER
1035/**
1036 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1037 * @netdev: interface device structure
1038 *
1039 * see Documentation/networking/netconsole.txt
1040 */
1041static void gelic_net_poll_controller(struct net_device *netdev)
1042{
1043 struct gelic_net_card *card = netdev_priv(netdev);
1044
1045 gelic_net_set_irq_mask(card, 0);
1046 gelic_net_interrupt(netdev->irq, netdev);
1047 gelic_net_set_irq_mask(card, card->ghiintmask);
1048}
1049#endif /* CONFIG_NET_POLL_CONTROLLER */
1050
1051/**
1052 * gelic_net_open_device - open device and map dma region
1053 * @card: card structure
1054 */
1055static int gelic_net_open_device(struct gelic_net_card *card)
1056{
1057 int result;
1058
1059 result = ps3_sb_event_receive_port_setup(card->dev, PS3_BINDING_CPU_ANY,
1060 &card->netdev->irq);
1061
1062 if (result) {
1063 dev_info(ctodev(card),
1064 "%s:%d: gelic_net_open_device failed (%d)\n",
1065 __func__, __LINE__, result);
1066 result = -EPERM;
1067 goto fail_alloc_irq;
1068 }
1069
1070 result = request_irq(card->netdev->irq, gelic_net_interrupt,
1071 IRQF_DISABLED, "gelic network", card->netdev);
1072
1073 if (result) {
1074 dev_info(ctodev(card), "%s:%d: request_irq failed (%d)\n",
1075 __func__, __LINE__, result);
1076 goto fail_request_irq;
1077 }
1078
1079 return 0;
1080
1081fail_request_irq:
1082 ps3_sb_event_receive_port_destroy(card->dev, card->netdev->irq);
1083 card->netdev->irq = NO_IRQ;
1084fail_alloc_irq:
1085 return result;
1086}
1087
1088
1089/**
1090 * gelic_net_open - called upon ifonfig up
1091 * @netdev: interface device structure
1092 *
1093 * returns 0 on success, <0 on failure
1094 *
1095 * gelic_net_open allocates all the descriptors and memory needed for
1096 * operation, sets up multicast list and enables interrupts
1097 */
1098static int gelic_net_open(struct net_device *netdev)
1099{
1100 struct gelic_net_card *card = netdev_priv(netdev);
1101
1102 dev_dbg(ctodev(card), " -> %s:%d\n", __func__, __LINE__);
1103
1104 gelic_net_open_device(card);
1105
1106 if (gelic_net_init_chain(card, &card->tx_chain,
1107 card->descr, GELIC_NET_TX_DESCRIPTORS))
1108 goto alloc_tx_failed;
1109 if (gelic_net_init_chain(card, &card->rx_chain,
1110 card->descr + GELIC_NET_RX_DESCRIPTORS,
1111 GELIC_NET_RX_DESCRIPTORS))
1112 goto alloc_rx_failed;
1113
1114 /* head of chain */
1115 card->tx_top = card->tx_chain.head;
1116 card->rx_top = card->rx_chain.head;
1117 dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
1118 card->rx_top, card->tx_top, sizeof(struct gelic_net_descr),
1119 GELIC_NET_RX_DESCRIPTORS);
1120 /* allocate rx skbs */
1121 if (gelic_net_alloc_rx_skbs(card))
1122 goto alloc_skbs_failed;
1123
1124 card->tx_dma_progress = 0;
1125 card->ghiintmask = GELIC_NET_RXINT | GELIC_NET_TXINT;
1126
1127 gelic_net_set_irq_mask(card, card->ghiintmask);
1128 gelic_net_enable_rxdmac(card);
1129
1130 netif_start_queue(netdev);
1131 netif_carrier_on(netdev);
1132 netif_poll_enable(netdev);
1133
1134 return 0;
1135
1136alloc_skbs_failed:
1137 gelic_net_free_chain(card, card->rx_top);
1138alloc_rx_failed:
1139 gelic_net_free_chain(card, card->tx_top);
1140alloc_tx_failed:
1141 return -ENOMEM;
1142}
1143
1144#ifdef GELIC_NET_ETHTOOL
1145static void gelic_net_get_drvinfo (struct net_device *netdev,
1146 struct ethtool_drvinfo *info)
1147{
1148 strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1);
1149 strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1);
1150}
1151
1152static int gelic_net_get_settings(struct net_device *netdev,
1153 struct ethtool_cmd *cmd)
1154{
1155 struct gelic_net_card *card = netdev_priv(netdev);
1156 int status;
1157 u64 v1, v2;
1158 int speed, duplex;
1159
1160 speed = duplex = -1;
1161 status = lv1_net_control(bus_id(card), dev_id(card),
1162 GELIC_NET_GET_ETH_PORT_STATUS, GELIC_NET_PORT, 0, 0,
1163 &v1, &v2);
1164 if (status) {
1165 /* link down */
1166 } else {
1167 if (v1 & GELIC_NET_FULL_DUPLEX) {
1168 duplex = DUPLEX_FULL;
1169 } else {
1170 duplex = DUPLEX_HALF;
1171 }
1172
1173 if (v1 & GELIC_NET_SPEED_10 ) {
1174 speed = SPEED_10;
1175 } else if (v1 & GELIC_NET_SPEED_100) {
1176 speed = SPEED_100;
1177 } else if (v1 & GELIC_NET_SPEED_1000) {
1178 speed = SPEED_1000;
1179 }
1180 }
1181 cmd->supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1182 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1183 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1184 SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full;
1185 cmd->advertising = cmd->supported;
1186 cmd->speed = speed;
1187 cmd->duplex = duplex;
1188 cmd->autoneg = AUTONEG_ENABLE; /* always enabled */
1189 cmd->port = PORT_TP;
1190
1191 return 0;
1192}
1193
1194static u32 gelic_net_get_link(struct net_device *netdev)
1195{
1196 struct gelic_net_card *card = netdev_priv(netdev);
1197 int status;
1198 u64 v1, v2;
1199 int link;
1200
1201 status = lv1_net_control(bus_id(card), dev_id(card),
1202 GELIC_NET_GET_ETH_PORT_STATUS, GELIC_NET_PORT, 0, 0,
1203 &v1, &v2);
1204 if (status)
1205 return 0; /* link down */
1206
1207 if (v1 & GELIC_NET_LINK_UP)
1208 link = 1;
1209 else
1210 link = 0;
1211
1212 return link;
1213}
1214
1215static int gelic_net_nway_reset(struct net_device *netdev)
1216{
1217 if (netif_running(netdev)) {
1218 gelic_net_stop(netdev);
1219 gelic_net_open(netdev);
1220 }
1221 return 0;
1222}
1223
1224static u32 gelic_net_get_tx_csum(struct net_device *netdev)
1225{
1226 return (netdev->features & NETIF_F_IP_CSUM) != 0;
1227}
1228
1229static int gelic_net_set_tx_csum(struct net_device *netdev, u32 data)
1230{
1231 if (data)
1232 netdev->features |= NETIF_F_IP_CSUM;
1233 else
1234 netdev->features &= ~NETIF_F_IP_CSUM;
1235
1236 return 0;
1237}
1238
1239static u32 gelic_net_get_rx_csum(struct net_device *netdev)
1240{
1241 struct gelic_net_card *card = netdev_priv(netdev);
1242
1243 return card->rx_csum;
1244}
1245
1246static int gelic_net_set_rx_csum(struct net_device *netdev, u32 data)
1247{
1248 struct gelic_net_card *card = netdev_priv(netdev);
1249
1250 card->rx_csum = data;
1251 return 0;
1252}
1253
1254static struct ethtool_ops gelic_net_ethtool_ops = {
1255 .get_drvinfo = gelic_net_get_drvinfo,
1256 .get_settings = gelic_net_get_settings,
1257 .get_link = gelic_net_get_link,
1258 .nway_reset = gelic_net_nway_reset,
1259 .get_tx_csum = gelic_net_get_tx_csum,
1260 .set_tx_csum = gelic_net_set_tx_csum,
1261 .get_rx_csum = gelic_net_get_rx_csum,
1262 .set_rx_csum = gelic_net_set_rx_csum,
1263};
1264#endif
1265
1266/**
1267 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1268 * function (to be called not under interrupt status)
1269 * @work: work is context of tx timout task
1270 *
1271 * called as task when tx hangs, resets interface (if interface is up)
1272 */
1273static void gelic_net_tx_timeout_task(struct work_struct *work)
1274{
1275 struct gelic_net_card *card =
1276 container_of(work, struct gelic_net_card, tx_timeout_task);
1277 struct net_device *netdev = card->netdev;
1278
1279 dev_info(ctodev(card), "%s:Timed out. Restarting... \n", __func__);
1280
1281 if (!(netdev->flags & IFF_UP))
1282 goto out;
1283
1284 netif_device_detach(netdev);
1285 gelic_net_stop(netdev);
1286
1287 gelic_net_open(netdev);
1288 netif_device_attach(netdev);
1289
1290out:
1291 atomic_dec(&card->tx_timeout_task_counter);
1292}
1293
1294/**
1295 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1296 * @netdev: interface device structure
1297 *
1298 * called, if tx hangs. Schedules a task that resets the interface
1299 */
1300static void gelic_net_tx_timeout(struct net_device *netdev)
1301{
1302 struct gelic_net_card *card;
1303
1304 card = netdev_priv(netdev);
1305 atomic_inc(&card->tx_timeout_task_counter);
1306 if (netdev->flags & IFF_UP)
1307 schedule_work(&card->tx_timeout_task);
1308 else
1309 atomic_dec(&card->tx_timeout_task_counter);
1310}
1311
1312/**
1313 * gelic_net_setup_netdev_ops - initialization of net_device operations
1314 * @netdev: net_device structure
1315 *
1316 * fills out function pointers in the net_device structure
1317 */
1318static void gelic_net_setup_netdev_ops(struct net_device *netdev)
1319{
1320 netdev->open = &gelic_net_open;
1321 netdev->stop = &gelic_net_stop;
1322 netdev->hard_start_xmit = &gelic_net_xmit;
1323 netdev->get_stats = &gelic_net_get_stats;
1324 netdev->set_multicast_list = &gelic_net_set_multi;
1325 netdev->change_mtu = &gelic_net_change_mtu;
1326 /* tx watchdog */
1327 netdev->tx_timeout = &gelic_net_tx_timeout;
1328 netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
1329 /* NAPI */
1330 netdev->poll = &gelic_net_poll;
1331 netdev->weight = GELIC_NET_NAPI_WEIGHT;
1332#ifdef GELIC_NET_ETHTOOL
1333 netdev->ethtool_ops = &gelic_net_ethtool_ops;
1334#endif
1335}
1336
1337/**
1338 * gelic_net_setup_netdev - initialization of net_device
1339 * @card: card structure
1340 *
1341 * Returns 0 on success or <0 on failure
1342 *
1343 * gelic_net_setup_netdev initializes the net_device structure
1344 **/
1345static int gelic_net_setup_netdev(struct gelic_net_card *card)
1346{
1347 struct net_device *netdev = card->netdev;
1348 struct sockaddr addr;
1349 unsigned int i;
1350 int status;
1351 u64 v1, v2;
1352
1353 SET_MODULE_OWNER(netdev);
1354 SET_NETDEV_DEV(netdev, &card->dev->core);
1355 spin_lock_init(&card->tx_dma_lock);
1356
1357 card->rx_csum = GELIC_NET_RX_CSUM_DEFAULT;
1358
1359 gelic_net_setup_netdev_ops(netdev);
1360
1361 netdev->features = NETIF_F_IP_CSUM;
1362
1363 status = lv1_net_control(bus_id(card), dev_id(card),
1364 GELIC_NET_GET_MAC_ADDRESS,
1365 0, 0, 0, &v1, &v2);
1366 if (status || !is_valid_ether_addr((u8 *)&v1)) {
1367 dev_info(ctodev(card),
1368 "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
1369 __func__, status);
1370 return -EINVAL;
1371 }
1372 v1 <<= 16;
1373 memcpy(addr.sa_data, &v1, ETH_ALEN);
1374 memcpy(netdev->dev_addr, addr.sa_data, ETH_ALEN);
1375 dev_info(ctodev(card), "MAC addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1376 netdev->dev_addr[0], netdev->dev_addr[1],
1377 netdev->dev_addr[2], netdev->dev_addr[3],
1378 netdev->dev_addr[4], netdev->dev_addr[5]);
1379
1380 card->vlan_index = -1; /* no vlan */
1381 for (i = 0; i < GELIC_NET_VLAN_MAX; i++) {
1382 status = lv1_net_control(bus_id(card), dev_id(card),
1383 GELIC_NET_GET_VLAN_ID,
1384 i + 1, /* index; one based */
1385 0, 0, &v1, &v2);
1386 if (status == GELIC_NET_VLAN_NO_ENTRY) {
1387 dev_dbg(ctodev(card),
1388 "GELIC_VLAN_ID no entry:%d, VLAN disabled\n",
1389 status);
1390 card->vlan_id[i] = 0;
1391 } else if (status) {
1392 dev_dbg(ctodev(card),
1393 "%s:GELIC_NET_VLAN_ID faild, status=%d\n",
1394 __func__, status);
1395 card->vlan_id[i] = 0;
1396 } else {
1397 card->vlan_id[i] = (u32)v1;
1398 dev_dbg(ctodev(card), "vlan_id:%d, %lx\n", i, v1);
1399 }
1400 }
1401 if (card->vlan_id[GELIC_NET_VLAN_WIRED - 1])
1402 card->vlan_index = GELIC_NET_VLAN_WIRED - 1;
1403
1404 status = register_netdev(netdev);
1405 if (status) {
1406 dev_err(ctodev(card), "%s:Couldn't register net_device: %d\n",
1407 __func__, status);
1408 return status;
1409 }
1410
1411 return 0;
1412}
1413
1414/**
1415 * gelic_net_alloc_card - allocates net_device and card structure
1416 *
1417 * returns the card structure or NULL in case of errors
1418 *
1419 * the card and net_device structures are linked to each other
1420 */
1421static struct gelic_net_card *gelic_net_alloc_card(void)
1422{
1423 struct net_device *netdev;
1424 struct gelic_net_card *card;
1425 size_t alloc_size;
1426
1427 alloc_size = sizeof (*card) +
1428 sizeof (struct gelic_net_descr) * GELIC_NET_RX_DESCRIPTORS +
1429 sizeof (struct gelic_net_descr) * GELIC_NET_TX_DESCRIPTORS;
1430 /*
1431 * we assume private data is allocated 32 bytes (or more) aligned
1432 * so that gelic_net_descr should be 32 bytes aligned.
1433 * Current alloc_etherdev() does do it because NETDEV_ALIGN
1434 * is 32.
1435 * check this assumption here.
1436 */
1437 BUILD_BUG_ON(NETDEV_ALIGN < 32);
1438 BUILD_BUG_ON(offsetof(struct gelic_net_card, irq_status) % 8);
1439 BUILD_BUG_ON(offsetof(struct gelic_net_card, descr) % 32);
1440
1441 netdev = alloc_etherdev(alloc_size);
1442 if (!netdev)
1443 return NULL;
1444
1445 card = netdev_priv(netdev);
1446 card->netdev = netdev;
1447 INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
1448 init_waitqueue_head(&card->waitq);
1449 atomic_set(&card->tx_timeout_task_counter, 0);
1450
1451 return card;
1452}
1453
1454/**
1455 * ps3_gelic_driver_probe - add a device to the control of this driver
1456 */
1457static int ps3_gelic_driver_probe (struct ps3_system_bus_device *dev)
1458{
1459 struct gelic_net_card *card = gelic_net_alloc_card();
1460 int result;
1461
1462 if (!card) {
1463 dev_info(&dev->core, "gelic_net_alloc_card failed\n");
1464 result = -ENOMEM;
1465 goto fail_alloc_card;
1466 }
1467
1468 ps3_system_bus_set_driver_data(dev, card);
1469 card->dev = dev;
1470
1471 result = ps3_open_hv_device(dev);
1472
1473 if (result) {
1474 dev_dbg(&dev->core, "ps3_open_hv_device failed\n");
1475 goto fail_open;
1476 }
1477
1478 result = ps3_dma_region_create(dev->d_region);
1479
1480 if (result) {
1481 dev_dbg(&dev->core, "ps3_dma_region_create failed(%d)\n",
1482 result);
1483 BUG_ON("check region type");
1484 goto fail_dma_region;
1485 }
1486
1487 result = lv1_net_set_interrupt_status_indicator(bus_id(card),
1488 dev_id(card),
1489 ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
1490 0);
1491
1492 if (result) {
1493 dev_dbg(&dev->core,
1494 "lv1_net_set_interrupt_status_indicator failed: %s\n",
1495 ps3_result(result));
1496 result = -EIO;
1497 goto fail_status_indicator;
1498 }
1499
1500 result = gelic_net_setup_netdev(card);
1501
1502 if (result) {
1503 dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
1504 "(%d)\n", __func__, __LINE__, result);
1505 goto fail_setup_netdev;
1506 }
1507
1508 return 0;
1509
1510fail_setup_netdev:
1511 lv1_net_set_interrupt_status_indicator(bus_id(card),
1512 bus_id(card),
1513 0 , 0);
1514fail_status_indicator:
1515 ps3_dma_region_free(dev->d_region);
1516fail_dma_region:
1517 ps3_close_hv_device(dev);
1518fail_open:
1519 ps3_system_bus_set_driver_data(dev, NULL);
1520 free_netdev(card->netdev);
1521fail_alloc_card:
1522 return result;
1523}
1524
1525/**
1526 * ps3_gelic_driver_remove - remove a device from the control of this driver
1527 */
1528
1529static int ps3_gelic_driver_remove (struct ps3_system_bus_device *dev)
1530{
1531 struct gelic_net_card *card = ps3_system_bus_get_driver_data(dev);
1532
1533 wait_event(card->waitq,
1534 atomic_read(&card->tx_timeout_task_counter) == 0);
1535
1536 lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
1537 0 , 0);
1538
1539 unregister_netdev(card->netdev);
1540 free_netdev(card->netdev);
1541
1542 ps3_system_bus_set_driver_data(dev, NULL);
1543
1544 ps3_dma_region_free(dev->d_region);
1545
1546 ps3_close_hv_device(dev);
1547
1548 return 0;
1549}
1550
1551static struct ps3_system_bus_driver ps3_gelic_driver = {
1552 .match_id = PS3_MATCH_ID_GELIC,
1553 .probe = ps3_gelic_driver_probe,
1554 .remove = ps3_gelic_driver_remove,
1555 .shutdown = ps3_gelic_driver_remove,
1556 .core.name = "ps3_gelic_driver",
1557 .core.owner = THIS_MODULE,
1558};
1559
1560static int __init ps3_gelic_driver_init (void)
1561{
1562 return firmware_has_feature(FW_FEATURE_PS3_LV1)
1563 ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1564 : -ENODEV;
1565}
1566
1567static void __exit ps3_gelic_driver_exit (void)
1568{
1569 ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1570}
1571
1572module_init (ps3_gelic_driver_init);
1573module_exit (ps3_gelic_driver_exit);
1574
1575MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1576
diff --git a/drivers/net/ps3_gelic_net.h b/drivers/net/ps3_gelic_net.h
new file mode 100644
index 000000000000..5e1c28654e16
--- /dev/null
+++ b/drivers/net/ps3_gelic_net.h
@@ -0,0 +1,239 @@
1/*
2 * PS3 Platfom 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.h
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#ifndef _GELIC_NET_H
29#define _GELIC_NET_H
30
31#define GELIC_NET_DRV_NAME "Gelic Network Driver"
32#define GELIC_NET_DRV_VERSION "1.0"
33
34#define GELIC_NET_ETHTOOL /* use ethtool */
35
36/* ioctl */
37#define GELIC_NET_GET_MODE (SIOCDEVPRIVATE + 0)
38#define GELIC_NET_SET_MODE (SIOCDEVPRIVATE + 1)
39
40/* descriptors */
41#define GELIC_NET_RX_DESCRIPTORS 128 /* num of descriptors */
42#define GELIC_NET_TX_DESCRIPTORS 128 /* num of descriptors */
43
44#define GELIC_NET_MAX_MTU 2308
45#define GELIC_NET_MIN_MTU 64
46#define GELIC_NET_RXBUF_ALIGN 128
47#define GELIC_NET_RX_CSUM_DEFAULT 1 /* hw chksum */
48#define GELIC_NET_WATCHDOG_TIMEOUT 5*HZ
49#define GELIC_NET_NAPI_WEIGHT (GELIC_NET_RX_DESCRIPTORS)
50#define GELIC_NET_BROADCAST_ADDR 0xffffffffffffL
51#define GELIC_NET_VLAN_POS (VLAN_ETH_ALEN * 2)
52#define GELIC_NET_VLAN_MAX 4
53#define GELIC_NET_MC_COUNT_MAX 32 /* multicast address list */
54
55enum gelic_net_int0_status {
56 GELIC_NET_GDTDCEINT = 24,
57 GELIC_NET_GRFANMINT = 28,
58};
59
60/* GHIINT1STS bits */
61enum gelic_net_int1_status {
62 GELIC_NET_GDADCEINT = 14,
63};
64
65/* interrupt mask */
66#define GELIC_NET_TXINT (1L << (GELIC_NET_GDTDCEINT + 32))
67
68#define GELIC_NET_RXINT0 (1L << (GELIC_NET_GRFANMINT + 32))
69#define GELIC_NET_RXINT1 (1L << GELIC_NET_GDADCEINT)
70#define GELIC_NET_RXINT (GELIC_NET_RXINT0 | GELIC_NET_RXINT1)
71
72 /* RX descriptor data_status bits */
73#define GELIC_NET_RXDMADU 0x80000000 /* destination MAC addr unknown */
74#define GELIC_NET_RXLSTFBF 0x40000000 /* last frame buffer */
75#define GELIC_NET_RXIPCHK 0x20000000 /* IP checksum performed */
76#define GELIC_NET_RXTCPCHK 0x10000000 /* TCP/UDP checksup performed */
77#define GELIC_NET_RXIPSPKT 0x08000000 /* IPsec packet */
78#define GELIC_NET_RXIPSAHPRT 0x04000000 /* IPsec AH protocol performed */
79#define GELIC_NET_RXIPSESPPRT 0x02000000 /* IPsec ESP protocol performed */
80#define GELIC_NET_RXSESPAH 0x01000000 /*
81 * IPsec ESP protocol auth
82 * performed
83 */
84
85#define GELIC_NET_RXWTPKT 0x00C00000 /*
86 * wakeup trigger packet
87 * 01: Magic Packet (TM)
88 * 10: ARP packet
89 * 11: Multicast MAC addr
90 */
91#define GELIC_NET_RXVLNPKT 0x00200000 /* VLAN packet */
92/* bit 20..16 reserved */
93#define GELIC_NET_RXRECNUM 0x0000ff00 /* reception receipt number */
94/* bit 7..0 reserved */
95
96#define GELIC_NET_TXDESC_TAIL 0
97#define GELIC_NET_DATA_STATUS_CHK_MASK (GELIC_NET_RXIPCHK | GELIC_NET_RXTCPCHK)
98
99/* RX descriptor data_error bits */
100/* bit 31 reserved */
101#define GELIC_NET_RXALNERR 0x40000000 /* alignement error 10/100M */
102#define GELIC_NET_RXOVERERR 0x20000000 /* oversize error */
103#define GELIC_NET_RXRNTERR 0x10000000 /* Runt error */
104#define GELIC_NET_RXIPCHKERR 0x08000000 /* IP checksum error */
105#define GELIC_NET_RXTCPCHKERR 0x04000000 /* TCP/UDP checksum error */
106#define GELIC_NET_RXUMCHSP 0x02000000 /* unmatched sp on sp */
107#define GELIC_NET_RXUMCHSPI 0x01000000 /* unmatched SPI on SAD */
108#define GELIC_NET_RXUMCHSAD 0x00800000 /* unmatched SAD */
109#define GELIC_NET_RXIPSAHERR 0x00400000 /* auth error on AH protocol
110 * processing */
111#define GELIC_NET_RXIPSESPAHERR 0x00200000 /* auth error on ESP protocol
112 * processing */
113#define GELIC_NET_RXDRPPKT 0x00100000 /* drop packet */
114#define GELIC_NET_RXIPFMTERR 0x00080000 /* IP packet format error */
115/* bit 18 reserved */
116#define GELIC_NET_RXDATAERR 0x00020000 /* IP packet format error */
117#define GELIC_NET_RXCALERR 0x00010000 /* cariier extension length
118 * error */
119#define GELIC_NET_RXCREXERR 0x00008000 /* carrier extention error */
120#define GELIC_NET_RXMLTCST 0x00004000 /* multicast address frame */
121/* bit 13..0 reserved */
122#define GELIC_NET_DATA_ERROR_CHK_MASK \
123 (GELIC_NET_RXIPCHKERR | GELIC_NET_RXTCPCHKERR)
124
125
126/* tx descriptor command and status */
127#define GELIC_NET_DMAC_CMDSTAT_NOCS 0xa0080000 /* middle of frame */
128#define GELIC_NET_DMAC_CMDSTAT_TCPCS 0xa00a0000
129#define GELIC_NET_DMAC_CMDSTAT_UDPCS 0xa00b0000
130#define GELIC_NET_DMAC_CMDSTAT_END_FRAME 0x00040000 /* end of frame */
131
132#define GELIC_NET_DMAC_CMDSTAT_RXDCEIS 0x00000002 /* descriptor chain end
133 * interrupt status */
134
135#define GELIC_NET_DMAC_CMDSTAT_CHAIN_END 0x00000002 /* RXDCEIS:DMA stopped */
136#define GELIC_NET_DMAC_CMDSTAT_NOT_IN_USE 0xb0000000
137#define GELIC_NET_DESCR_IND_PROC_SHIFT 28
138#define GELIC_NET_DESCR_IND_PROC_MASKO 0x0fffffff
139
140
141enum gelic_net_descr_status {
142 GELIC_NET_DESCR_COMPLETE = 0x00, /* used in rx and tx */
143 GELIC_NET_DESCR_RESPONSE_ERROR = 0x01, /* used in rx and tx */
144 GELIC_NET_DESCR_PROTECTION_ERROR = 0x02, /* used in rx and tx */
145 GELIC_NET_DESCR_FRAME_END = 0x04, /* used in rx */
146 GELIC_NET_DESCR_FORCE_END = 0x05, /* used in rx and tx */
147 GELIC_NET_DESCR_CARDOWNED = 0x0a, /* used in rx and tx */
148 GELIC_NET_DESCR_NOT_IN_USE /* any other value */
149};
150/* for lv1_net_control */
151#define GELIC_NET_GET_MAC_ADDRESS 0x0000000000000001
152#define GELIC_NET_GET_ETH_PORT_STATUS 0x0000000000000002
153#define GELIC_NET_SET_NEGOTIATION_MODE 0x0000000000000003
154#define GELIC_NET_GET_VLAN_ID 0x0000000000000004
155
156#define GELIC_NET_LINK_UP 0x0000000000000001
157#define GELIC_NET_FULL_DUPLEX 0x0000000000000002
158#define GELIC_NET_AUTO_NEG 0x0000000000000004
159#define GELIC_NET_SPEED_10 0x0000000000000010
160#define GELIC_NET_SPEED_100 0x0000000000000020
161#define GELIC_NET_SPEED_1000 0x0000000000000040
162
163#define GELIC_NET_VLAN_ALL 0x0000000000000001
164#define GELIC_NET_VLAN_WIRED 0x0000000000000002
165#define GELIC_NET_VLAN_WIRELESS 0x0000000000000003
166#define GELIC_NET_VLAN_PSP 0x0000000000000004
167#define GELIC_NET_VLAN_PORT0 0x0000000000000010
168#define GELIC_NET_VLAN_PORT1 0x0000000000000011
169#define GELIC_NET_VLAN_PORT2 0x0000000000000012
170#define GELIC_NET_VLAN_DAEMON_CLIENT_BSS 0x0000000000000013
171#define GELIC_NET_VLAN_LIBERO_CLIENT_BSS 0x0000000000000014
172#define GELIC_NET_VLAN_NO_ENTRY -6
173
174#define GELIC_NET_PORT 2 /* for port status */
175
176/* size of hardware part of gelic descriptor */
177#define GELIC_NET_DESCR_SIZE (32)
178struct gelic_net_descr {
179 /* as defined by the hardware */
180 u32 buf_addr;
181 u32 buf_size;
182 u32 next_descr_addr;
183 u32 dmac_cmd_status;
184 u32 result_size;
185 u32 valid_size; /* all zeroes for tx */
186 u32 data_status;
187 u32 data_error; /* all zeroes for tx */
188
189 /* used in the driver */
190 struct sk_buff *skb;
191 dma_addr_t bus_addr;
192 struct gelic_net_descr *next;
193 struct gelic_net_descr *prev;
194 struct vlan_ethhdr vlan;
195} __attribute__((aligned(32)));
196
197struct gelic_net_descr_chain {
198 /* we walk from tail to head */
199 struct gelic_net_descr *head;
200 struct gelic_net_descr *tail;
201};
202
203struct gelic_net_card {
204 struct net_device *netdev;
205 /*
206 * hypervisor requires irq_status should be
207 * 8 bytes aligned, but u64 member is
208 * always disposed in that manner
209 */
210 u64 irq_status;
211 u64 ghiintmask;
212
213 struct ps3_system_bus_device *dev;
214 u32 vlan_id[GELIC_NET_VLAN_MAX];
215 int vlan_index;
216
217 struct gelic_net_descr_chain tx_chain;
218 struct gelic_net_descr_chain rx_chain;
219 /* gurad dmac descriptor chain*/
220 spinlock_t chain_lock;
221
222 struct net_device_stats netdev_stats;
223 int rx_csum;
224 /* guard tx_dma_progress */
225 spinlock_t tx_dma_lock;
226 int tx_dma_progress;
227
228 struct work_struct tx_timeout_task;
229 atomic_t tx_timeout_task_counter;
230 wait_queue_head_t waitq;
231
232 struct gelic_net_descr *tx_top, *rx_top;
233 struct gelic_net_descr descr[0];
234};
235
236
237extern unsigned long p_to_lp(long pa);
238
239#endif /* _GELIC_NET_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 05:01:00 -0500