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drivers/net/vxge/vxge-main.c: Remove unnecessary casts of pci_get_drvdata
[net-next-2.6.git] / drivers / net / spider_net.c
CommitLineData
aaec0fab 1/*
3342cf0e 2 * Network device driver for Cell Processor-Based Blade and Celleb platform
aaec0fab
JO		 3 *
4 * (C) Copyright IBM Corp. 2005
3342cf0e 5 * (C) Copyright 2006 TOSHIBA CORPORATION
aaec0fab
JO		 6 *
7 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
8 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
aaec0fab
JO		 25#include <linux/compiler.h>
26#include <linux/crc32.h>
27#include <linux/delay.h>
28#include <linux/etherdevice.h>
29#include <linux/ethtool.h>
30#include <linux/firmware.h>
31#include <linux/if_vlan.h>
7c5c220e 32#include <linux/in.h>
aaec0fab 33#include <linux/init.h>
5a0e3ad6 34#include <linux/gfp.h>
aaec0fab
JO		 35#include <linux/ioport.h>
36#include <linux/ip.h>
37#include <linux/kernel.h>
38#include <linux/mii.h>
39#include <linux/module.h>
40#include <linux/netdevice.h>
41#include <linux/device.h>
42#include <linux/pci.h>
43#include <linux/skbuff.h>
aaec0fab
JO		 44#include <linux/tcp.h>
45#include <linux/types.h>
11f1a52b 46#include <linux/vmalloc.h>
aaec0fab
JO		 47#include <linux/wait.h>
48#include <linux/workqueue.h>
1977f032 49#include <linux/bitops.h>
aaec0fab
JO		 50#include <asm/pci-bridge.h>
51#include <net/checksum.h>
52
53#include "spider_net.h"
54
55MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
56 "<Jens.Osterkamp@de.ibm.com>");
57MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
58MODULE_LICENSE("GPL");
90f10841 59MODULE_VERSION(VERSION);
866691a2 60MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME);
aaec0fab
JO		 61
62static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
63static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
64
e2874f2e
LV		 65module_param(rx_descriptors, int, 0444);
66module_param(tx_descriptors, int, 0444);
aaec0fab
JO		 67
68MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
69 "in rx chains");
70MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
71 "in tx chain");
72
73char spider_net_driver_name[] = "spidernet";
74
a3aa1884 75static DEFINE_PCI_DEVICE_TABLE(spider_net_pci_tbl) = {
aaec0fab
JO		 76 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
77 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
78 { 0, }
79};
80
81MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
82
83/**
84 * spider_net_read_reg - reads an SMMIO register of a card
85 * @card: device structure
86 * @reg: register to read from
87 *
88 * returns the content of the specified SMMIO register.
89 */
bdd01503 90static inline u32
aaec0fab
JO		 91spider_net_read_reg(struct spider_net_card *card, u32 reg)
92{
3bc0f40c
BH		 93 /* We use the powerpc specific variants instead of readl_be() because
94 * we know spidernet is not a real PCI device and we can thus avoid the
95 * performance hit caused by the PCI workarounds.
96 */
97 return in_be32(card->regs + reg);
aaec0fab
JO		 98}
99
100/**
101 * spider_net_write_reg - writes to an SMMIO register of a card
102 * @card: device structure
103 * @reg: register to write to
104 * @value: value to write into the specified SMMIO register
105 */
bdd01503 106static inline void
aaec0fab
JO		 107spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
108{
3bc0f40c
BH		 109 /* We use the powerpc specific variants instead of writel_be() because
110 * we know spidernet is not a real PCI device and we can thus avoid the
111 * performance hit caused by the PCI workarounds.
112 */
113 out_be32(card->regs + reg, value);
aaec0fab
JO		 114}
115
aaec0fab
JO		 116/** spider_net_write_phy - write to phy register
117 * @netdev: adapter to be written to
118 * @mii_id: id of MII
119 * @reg: PHY register
120 * @val: value to be written to phy register
121 *
122 * spider_net_write_phy_register writes to an arbitrary PHY
123 * register via the spider GPCWOPCMD register. We assume the queue does
124 * not run full (not more than 15 commands outstanding).
125 **/
126static void
127spider_net_write_phy(struct net_device *netdev, int mii_id,
128 int reg, int val)
129{
130 struct spider_net_card *card = netdev_priv(netdev);
131 u32 writevalue;
132
133 writevalue = ((u32)mii_id << 21) |
134 ((u32)reg << 16) | ((u32)val);
135
136 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
137}
138
139/** spider_net_read_phy - read from phy register
140 * @netdev: network device to be read from
141 * @mii_id: id of MII
142 * @reg: PHY register
143 *
144 * Returns value read from PHY register
145 *
146 * spider_net_write_phy reads from an arbitrary PHY
147 * register via the spider GPCROPCMD register
148 **/
149static int
150spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
151{
152 struct spider_net_card *card = netdev_priv(netdev);
153 u32 readvalue;
154
155 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
156 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
157
158 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
159 * interrupt, as we poll for the completion of the read operation
160 * in spider_net_read_phy. Should take about 50 us */
161 do {
162 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
163 } while (readvalue & SPIDER_NET_GPREXEC);
164
165 readvalue &= SPIDER_NET_GPRDAT_MASK;
166
167 return readvalue;
168}
169
abdb66b5
KI		 170/**
171 * spider_net_setup_aneg - initial auto-negotiation setup
172 * @card: device structure
173 **/
174static void
175spider_net_setup_aneg(struct spider_net_card *card)
176{
177 struct mii_phy *phy = &card->phy;
178 u32 advertise = 0;
a1c38a4a 179 u16 bmsr, estat;
abdb66b5 180
a1c38a4a
IK		 181 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
182 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
abdb66b5
KI		 183
184 if (bmsr & BMSR_10HALF)
185 advertise |= ADVERTISED_10baseT_Half;
186 if (bmsr & BMSR_10FULL)
187 advertise |= ADVERTISED_10baseT_Full;
188 if (bmsr & BMSR_100HALF)
189 advertise |= ADVERTISED_100baseT_Half;
190 if (bmsr & BMSR_100FULL)
191 advertise |= ADVERTISED_100baseT_Full;
192
193 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
194 advertise |= SUPPORTED_1000baseT_Full;
195 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
196 advertise |= SUPPORTED_1000baseT_Half;
197
198 mii_phy_probe(phy, phy->mii_id);
199 phy->def->ops->setup_aneg(phy, advertise);
200
201}
202
aaec0fab 203/**
11f1a52b 204 * spider_net_rx_irq_off - switch off rx irq on this spider card
aaec0fab
JO		 205 * @card: device structure
206 *
11f1a52b 207 * switches off rx irq by masking them out in the GHIINTnMSK register
aaec0fab
JO		 208 */
209static void
11f1a52b 210spider_net_rx_irq_off(struct spider_net_card *card)
aaec0fab
JO		 211{
212 u32 regvalue;
aaec0fab 213
11f1a52b
AB		 214 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
215 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
aaec0fab
JO		 216}
217
218/**
11f1a52b 219 * spider_net_rx_irq_on - switch on rx irq on this spider card
aaec0fab
JO		 220 * @card: device structure
221 *
11f1a52b 222 * switches on rx irq by enabling them in the GHIINTnMSK register
aaec0fab
JO		 223 */
224static void
11f1a52b 225spider_net_rx_irq_on(struct spider_net_card *card)
aaec0fab
JO		 226{
227 u32 regvalue;
aaec0fab 228
11f1a52b
AB		 229 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
230 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
aaec0fab
JO		 231}
232
233/**
234 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
235 * @card: card structure
236 *
237 * spider_net_set_promisc sets the unicast destination address filter and
238 * thus either allows for non-promisc mode or promisc mode
239 */
240static void
241spider_net_set_promisc(struct spider_net_card *card)
242{
243 u32 macu, macl;
244 struct net_device *netdev = card->netdev;
245
246 if (netdev->flags & IFF_PROMISC) {
247 /* clear destination entry 0 */
248 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
249 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
250 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
251 SPIDER_NET_PROMISC_VALUE);
252 } else {
253 macu = netdev->dev_addr[0];
254 macu <<= 8;
255 macu |= netdev->dev_addr[1];
256 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
257
258 macu |= SPIDER_NET_UA_DESCR_VALUE;
259 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
260 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
261 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
262 SPIDER_NET_NONPROMISC_VALUE);
263 }
264}
265
266/**
267 * spider_net_get_mac_address - read mac address from spider card
268 * @card: device structure
269 *
270 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
271 */
272static int
273spider_net_get_mac_address(struct net_device *netdev)
274{
275 struct spider_net_card *card = netdev_priv(netdev);
276 u32 macl, macu;
277
278 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
279 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
280
281 netdev->dev_addr[0] = (macu >> 24) & 0xff;
282 netdev->dev_addr[1] = (macu >> 16) & 0xff;
283 netdev->dev_addr[2] = (macu >> 8) & 0xff;
284 netdev->dev_addr[3] = macu & 0xff;
285 netdev->dev_addr[4] = (macl >> 8) & 0xff;
286 netdev->dev_addr[5] = macl & 0xff;
287
288 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
289 return -EINVAL;
290
291 return 0;
292}
293
294/**
295 * spider_net_get_descr_status -- returns the status of a descriptor
296 * @descr: descriptor to look at
297 *
298 * returns the status as in the dmac_cmd_status field of the descriptor
299 */
bdd01503 300static inline int
4cb6f9e5 301spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
aaec0fab 302{
4cb6f9e5 303 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
aaec0fab
JO		 304}
305
306/**
307 * spider_net_free_chain - free descriptor chain
308 * @card: card structure
309 * @chain: address of chain
310 *
311 */
312static void
313spider_net_free_chain(struct spider_net_card *card,
314 struct spider_net_descr_chain *chain)
315{
316 struct spider_net_descr *descr;
317
d4ed8f8d
LV		 318 descr = chain->ring;
319 do {
aaec0fab 320 descr->bus_addr = 0;
4cb6f9e5 321 descr->hwdescr->next_descr_addr = 0;
d4ed8f8d
LV		 322 descr = descr->next;
323 } while (descr != chain->ring);
324
325 dma_free_coherent(&card->pdev->dev, chain->num_desc,
4cb6f9e5 326 chain->hwring, chain->dma_addr);
aaec0fab
JO		 327}
328
329/**
d4ed8f8d 330 * spider_net_init_chain - alloc and link descriptor chain
aaec0fab
JO		 331 * @card: card structure
332 * @chain: address of chain
aaec0fab 333 *
d4ed8f8d 334 * We manage a circular list that mirrors the hardware structure,
aaec0fab
JO		 335 * except that the hardware uses bus addresses.
336 *
d4ed8f8d 337 * Returns 0 on success, <0 on failure
aaec0fab
JO		 338 */
339static int
340spider_net_init_chain(struct spider_net_card *card,
d4ed8f8d 341 struct spider_net_descr_chain *chain)
aaec0fab
JO		 342{
343 int i;
344 struct spider_net_descr *descr;
4cb6f9e5 345 struct spider_net_hw_descr *hwdescr;
11f1a52b 346 dma_addr_t buf;
d4ed8f8d 347 size_t alloc_size;
aaec0fab 348
4cb6f9e5 349 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
aaec0fab 350
4cb6f9e5 351 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
d4ed8f8d 352 &chain->dma_addr, GFP_KERNEL);
aaec0fab 353
4cb6f9e5 354 if (!chain->hwring)
d4ed8f8d 355 return -ENOMEM;
aaec0fab 356
4cb6f9e5 357 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
d4ed8f8d
LV		 358
359 /* Set up the hardware pointers in each descriptor */
4cb6f9e5
LV		 360 descr = chain->ring;
361 hwdescr = chain->hwring;
d4ed8f8d 362 buf = chain->dma_addr;
4cb6f9e5
LV		 363 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
364 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
365 hwdescr->next_descr_addr = 0;
aaec0fab 366
4cb6f9e5 367 descr->hwdescr = hwdescr;
11f1a52b 368 descr->bus_addr = buf;
aaec0fab
JO		 369 descr->next = descr + 1;
370 descr->prev = descr - 1;
371
4cb6f9e5 372 buf += sizeof(struct spider_net_hw_descr);
aaec0fab
JO		 373 }
374 /* do actual circular list */
d4ed8f8d
LV		 375 (descr-1)->next = chain->ring;
376 chain->ring->prev = descr-1;
aaec0fab 377
bdd01503 378 spin_lock_init(&chain->lock);
d4ed8f8d
LV		 379 chain->head = chain->ring;
380 chain->tail = chain->ring;
aaec0fab 381 return 0;
aaec0fab
JO		 382}
383
384/**
385 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
386 * @card: card structure
387 *
388 * returns 0 on success, <0 on failure
389 */
390static void
391spider_net_free_rx_chain_contents(struct spider_net_card *card)
392{
393 struct spider_net_descr *descr;
394
395 descr = card->rx_chain.head;
64751910 396 do {
aaec0fab 397 if (descr->skb) {
4cb6f9e5 398 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
11f1a52b 399 SPIDER_NET_MAX_FRAME,
348bc2a6 400 PCI_DMA_BIDIRECTIONAL);
d9c199ee
LV		 401 dev_kfree_skb(descr->skb);
402 descr->skb = NULL;
aaec0fab
JO		 403 }
404 descr = descr->next;
64751910 405 } while (descr != card->rx_chain.head);
aaec0fab
JO		 406}
407
408/**
a4182c50 409 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
aaec0fab
JO		 410 * @card: card structure
411 * @descr: descriptor to re-init
412 *
af901ca1 413 * Return 0 on success, <0 on failure.
aaec0fab 414 *
a4182c50
LV		 415 * Allocates a new rx skb, iommu-maps it and attaches it to the
416 * descriptor. Mark the descriptor as activated, ready-to-use.
aaec0fab
JO		 417 */
418static int
419spider_net_prepare_rx_descr(struct spider_net_card *card,
420 struct spider_net_descr *descr)
421{
4cb6f9e5 422 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
8e0a613b 423 dma_addr_t buf;
aaec0fab
JO		 424 int offset;
425 int bufsize;
426
427 /* we need to round up the buffer size to a multiple of 128 */
11f1a52b 428 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
aaec0fab
JO		 429 (~(SPIDER_NET_RXBUF_ALIGN - 1));
430
431 /* and we need to have it 128 byte aligned, therefore we allocate a
432 * bit more */
433 /* allocate an skb */
98739407
CH		 434 descr->skb = netdev_alloc_skb(card->netdev,
435 bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
aaec0fab 436 if (!descr->skb) {
11f1a52b 437 if (netif_msg_rx_err(card) && net_ratelimit())
e6311d85
LV		 438 dev_err(&card->netdev->dev,
439 "Not enough memory to allocate rx buffer\n");
9b6b0b81 440 card->spider_stats.alloc_rx_skb_error++;
aaec0fab
JO		 441 return -ENOMEM;
442 }
4cb6f9e5
LV		 443 hwdescr->buf_size = bufsize;
444 hwdescr->result_size = 0;
445 hwdescr->valid_size = 0;
446 hwdescr->data_status = 0;
447 hwdescr->data_error = 0;
aaec0fab
JO		 448
449 offset = ((unsigned long)descr->skb->data) &
450 (SPIDER_NET_RXBUF_ALIGN - 1);
451 if (offset)
452 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
a4182c50 453 /* iommu-map the skb */
8e0a613b 454 buf = pci_map_single(card->pdev, descr->skb->data,
bdd01503 455 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
8d8bb39b 456 if (pci_dma_mapping_error(card->pdev, buf)) {
aaec0fab 457 dev_kfree_skb_any(descr->skb);
d9c199ee 458 descr->skb = NULL;
11f1a52b 459 if (netif_msg_rx_err(card) && net_ratelimit())
e6311d85 460 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
9b6b0b81 461 card->spider_stats.rx_iommu_map_error++;
4cb6f9e5 462 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
aaec0fab 463 } else {
4cb6f9e5 464 hwdescr->buf_addr = buf;
90476a20 465 wmb();
4cb6f9e5 466 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
bdd01503 467 SPIDER_NET_DMAC_NOINTR_COMPLETE;
aaec0fab
JO		 468 }
469
a4182c50 470 return 0;
aaec0fab
JO		 471}
472
473/**
11f1a52b 474 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
aaec0fab
JO		 475 * @card: card structure
476 *
3ad2f3fb 477 * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the
aaec0fab
JO		 478 * chip by writing to the appropriate register. DMA is enabled in
479 * spider_net_enable_rxdmac.
480 */
bdd01503 481static inline void
aaec0fab
JO		 482spider_net_enable_rxchtails(struct spider_net_card *card)
483{
484 /* assume chain is aligned correctly */
485 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
486 card->rx_chain.tail->bus_addr);
487}
488
489/**
490 * spider_net_enable_rxdmac - enables a receive DMA controller
491 * @card: card structure
492 *
493 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
494 * in the GDADMACCNTR register
495 */
bdd01503 496static inline void
aaec0fab
JO		 497spider_net_enable_rxdmac(struct spider_net_card *card)
498{
11f1a52b 499 wmb();
aaec0fab
JO		 500 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
501 SPIDER_NET_DMA_RX_VALUE);
502}
503
59a11f88
LV		 504/**
505 * spider_net_disable_rxdmac - disables the receive DMA controller
506 * @card: card structure
507 *
508 * spider_net_disable_rxdmac terminates processing on the DMA controller
509 * by turing off the DMA controller, with the force-end flag set.
510 */
511static inline void
512spider_net_disable_rxdmac(struct spider_net_card *card)
513{
514 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
515 SPIDER_NET_DMA_RX_FEND_VALUE);
516}
517
aaec0fab
JO		 518/**
519 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
520 * @card: card structure
521 *
11f1a52b 522 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
aaec0fab
JO		 523 */
524static void
525spider_net_refill_rx_chain(struct spider_net_card *card)
526{
bdd01503
JO		 527 struct spider_net_descr_chain *chain = &card->rx_chain;
528 unsigned long flags;
aaec0fab 529
11f1a52b
AB		 530 /* one context doing the refill (and a second context seeing that
531 * and omitting it) is ok. If called by NAPI, we'll be called again
532 * as spider_net_decode_one_descr is called several times. If some
533 * interrupt calls us, the NAPI is about to clean up anyway. */
bdd01503
JO		 534 if (!spin_trylock_irqsave(&chain->lock, flags))
535 return;
536
4cb6f9e5 537 while (spider_net_get_descr_status(chain->head->hwdescr) ==
bdd01503
JO		 538 SPIDER_NET_DESCR_NOT_IN_USE) {
539 if (spider_net_prepare_rx_descr(card, chain->head))
540 break;
541 chain->head = chain->head->next;
542 }
aaec0fab 543
bdd01503 544 spin_unlock_irqrestore(&chain->lock, flags);
aaec0fab
JO		 545}
546
547/**
2c307db7 548 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
aaec0fab
JO		 549 * @card: card structure
550 *
2c307db7 551 * Returns 0 on success, <0 on failure.
aaec0fab
JO		 552 */
553static int
554spider_net_alloc_rx_skbs(struct spider_net_card *card)
555{
2bf27a0d
LV		 556 struct spider_net_descr_chain *chain = &card->rx_chain;
557 struct spider_net_descr *start = chain->tail;
558 struct spider_net_descr *descr = start;
aaec0fab 559
2bf27a0d
LV		 560 /* Link up the hardware chain pointers */
561 do {
562 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
563 descr = descr->next;
564 } while (descr != start);
aaec0fab 565
2c307db7
LV		 566 /* Put at least one buffer into the chain. if this fails,
567 * we've got a problem. If not, spider_net_refill_rx_chain
568 * will do the rest at the end of this function. */
aaec0fab
JO		 569 if (spider_net_prepare_rx_descr(card, chain->head))
570 goto error;
571 else
572 chain->head = chain->head->next;
573
2c307db7
LV		 574 /* This will allocate the rest of the rx buffers;
575 * if not, it's business as usual later on. */
aaec0fab 576 spider_net_refill_rx_chain(card);
11f1a52b 577 spider_net_enable_rxdmac(card);
aaec0fab
JO		 578 return 0;
579
580error:
581 spider_net_free_rx_chain_contents(card);
2bf27a0d 582 return -ENOMEM;
aaec0fab
JO		 583}
584
aaec0fab
JO		 585/**
586 * spider_net_get_multicast_hash - generates hash for multicast filter table
587 * @addr: multicast address
588 *
589 * returns the hash value.
590 *
591 * spider_net_get_multicast_hash calculates a hash value for a given multicast
592 * address, that is used to set the multicast filter tables
593 */
594static u8
595spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
596{
aaec0fab
JO		 597 u32 crc;
598 u8 hash;
11f1a52b
AB		 599 char addr_for_crc[ETH_ALEN] = { 0, };
600 int i, bit;
601
602 for (i = 0; i < ETH_ALEN * 8; i++) {
603 bit = (addr[i / 8] >> (i % 8)) & 1;
604 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
605 }
aaec0fab 606
11f1a52b 607 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
aaec0fab
JO		 608
609 hash = (crc >> 27);
610 hash <<= 3;
611 hash |= crc & 7;
11f1a52b 612 hash &= 0xff;
aaec0fab
JO		 613
614 return hash;
615}
616
617/**
618 * spider_net_set_multi - sets multicast addresses and promisc flags
619 * @netdev: interface device structure
620 *
621 * spider_net_set_multi configures multicast addresses as needed for the
622 * netdev interface. It also sets up multicast, allmulti and promisc
623 * flags appropriately
624 */
625static void
626spider_net_set_multi(struct net_device *netdev)
627{
22bedad3 628 struct netdev_hw_addr *ha;
aaec0fab
JO		 629 u8 hash;
630 int i;
631 u32 reg;
632 struct spider_net_card *card = netdev_priv(netdev);
633 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
634 {0, };
635
636 spider_net_set_promisc(card);
637
638 if (netdev->flags & IFF_ALLMULTI) {
639 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
640 set_bit(i, bitmask);
641 }
642 goto write_hash;
643 }
644
645 /* well, we know, what the broadcast hash value is: it's xfd
646 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
647 set_bit(0xfd, bitmask);
648
22bedad3
JP		 649 netdev_for_each_mc_addr(ha, netdev) {
650 hash = spider_net_get_multicast_hash(netdev, ha->addr);
aaec0fab
JO		 651 set_bit(hash, bitmask);
652 }
653
654write_hash:
655 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
656 reg = 0;
657 if (test_bit(i * 4, bitmask))
658 reg += 0x08;
659 reg <<= 8;
660 if (test_bit(i * 4 + 1, bitmask))
661 reg += 0x08;
662 reg <<= 8;
663 if (test_bit(i * 4 + 2, bitmask))
664 reg += 0x08;
665 reg <<= 8;
666 if (test_bit(i * 4 + 3, bitmask))
667 reg += 0x08;
668
669 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
670 }
671}
672
aaec0fab
JO		 673/**
674 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
675 * @card: card structure
aaec0fab
JO		 676 * @skb: packet to use
677 *
678 * returns 0 on success, <0 on failure.
679 *
680 * fills out the descriptor structure with skb data and len. Copies data,
681 * if needed (32bit DMA!)
682 */
683static int
684spider_net_prepare_tx_descr(struct spider_net_card *card,
aaec0fab
JO		 685 struct sk_buff *skb)
686{
d9c199ee 687 struct spider_net_descr_chain *chain = &card->tx_chain;
9cc7bf7e 688 struct spider_net_descr *descr;
4cb6f9e5 689 struct spider_net_hw_descr *hwdescr;
11f1a52b 690 dma_addr_t buf;
9cc7bf7e 691 unsigned long flags;
11f1a52b 692
9c434f5e 693 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
8d8bb39b 694 if (pci_dma_mapping_error(card->pdev, buf)) {
11f1a52b 695 if (netif_msg_tx_err(card) && net_ratelimit())
e6311d85 696 dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). "
9c434f5e 697 "Dropping packet\n", skb->data, skb->len);
9b6b0b81 698 card->spider_stats.tx_iommu_map_error++;
aaec0fab
JO		 699 return -ENOMEM;
700 }
701
d9c199ee 702 spin_lock_irqsave(&chain->lock, flags);
9cc7bf7e 703 descr = card->tx_chain.head;
d9c199ee
LV		 704 if (descr->next == chain->tail->prev) {
705 spin_unlock_irqrestore(&chain->lock, flags);
706 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
707 return -ENOMEM;
708 }
4cb6f9e5 709 hwdescr = descr->hwdescr;
d9c199ee 710 chain->head = descr->next;
9cc7bf7e 711
aaec0fab 712 descr->skb = skb;
4cb6f9e5
LV		 713 hwdescr->buf_addr = buf;
714 hwdescr->buf_size = skb->len;
715 hwdescr->next_descr_addr = 0;
716 hwdescr->data_status = 0;
aaec0fab 717
4cb6f9e5 718 hwdescr->dmac_cmd_status =
5f309b90 719 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL;
d9c199ee 720 spin_unlock_irqrestore(&chain->lock, flags);
9cc7bf7e 721
3a2c892d 722 if (skb->ip_summed == CHECKSUM_PARTIAL)
eddc9ec5 723 switch (ip_hdr(skb)->protocol) {
bdd01503 724 case IPPROTO_TCP:
4cb6f9e5 725 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
bdd01503
JO		 726 break;
727 case IPPROTO_UDP:
4cb6f9e5 728 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
bdd01503
JO		 729 break;
730 }
731
204e5fa1 732 /* Chain the bus address, so that the DMA engine finds this descr. */
4cb6f9e5
LV		 733 wmb();
734 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
bdd01503 735
917a5b8e 736 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
bdd01503
JO		 737 return 0;
738}
739
a664ccf4 740static int
204e5fa1
LV		 741spider_net_set_low_watermark(struct spider_net_card *card)
742{
4cb6f9e5
LV		 743 struct spider_net_descr *descr = card->tx_chain.tail;
744 struct spider_net_hw_descr *hwdescr;
9cc7bf7e 745 unsigned long flags;
204e5fa1
LV		 746 int status;
747 int cnt=0;
748 int i;
204e5fa1 749
9cc7bf7e
LV		 750 /* Measure the length of the queue. Measurement does not
751 * need to be precise -- does not need a lock. */
204e5fa1 752 while (descr != card->tx_chain.head) {
4cb6f9e5 753 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
204e5fa1
LV		 754 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
755 break;
756 descr = descr->next;
757 cnt++;
758 }
759
760 /* If TX queue is short, don't even bother with interrupts */
d4ed8f8d 761 if (cnt < card->tx_chain.num_desc/4)
a664ccf4 762 return cnt;
204e5fa1
LV		 763
764 /* Set low-watermark 3/4th's of the way into the queue. */
765 descr = card->tx_chain.tail;
766 cnt = (cnt*3)/4;
767 for (i=0;i<cnt; i++)
768 descr = descr->next;
769
770 /* Set the new watermark, clear the old watermark */
9cc7bf7e 771 spin_lock_irqsave(&card->tx_chain.lock, flags);
4cb6f9e5
LV		 772 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
773 if (card->low_watermark && card->low_watermark != descr) {
774 hwdescr = card->low_watermark->hwdescr;
775 hwdescr->dmac_cmd_status =
776 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
777 }
204e5fa1 778 card->low_watermark = descr;
9cc7bf7e 779 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
a664ccf4 780 return cnt;
204e5fa1
LV		 781}
782
bdd01503
JO		 783/**
784 * spider_net_release_tx_chain - processes sent tx descriptors
785 * @card: adapter structure
786 * @brutal: if set, don't care about whether descriptor seems to be in use
787 *
788 * returns 0 if the tx ring is empty, otherwise 1.
789 *
790 * spider_net_release_tx_chain releases the tx descriptors that spider has
791 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
792 * If some other context is calling this function, we return 1 so that we're
26aca5ec 793 * scheduled again (if we were scheduled) and will not lose initiative.
bdd01503
JO		 794 */
795static int
796spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
797{
09f75cd7 798 struct net_device *dev = card->netdev;
bdd01503 799 struct spider_net_descr_chain *chain = &card->tx_chain;
9cc7bf7e 800 struct spider_net_descr *descr;
4cb6f9e5 801 struct spider_net_hw_descr *hwdescr;
9cc7bf7e
LV		 802 struct sk_buff *skb;
803 u32 buf_addr;
804 unsigned long flags;
bdd01503
JO		 805 int status;
806
5c8e98fe 807 while (1) {
9cc7bf7e 808 spin_lock_irqsave(&chain->lock, flags);
5c8e98fe
LV		 809 if (chain->tail == chain->head) {
810 spin_unlock_irqrestore(&chain->lock, flags);
811 return 0;
812 }
9cc7bf7e 813 descr = chain->tail;
4cb6f9e5 814 hwdescr = descr->hwdescr;
9cc7bf7e 815
4cb6f9e5 816 status = spider_net_get_descr_status(hwdescr);
bdd01503
JO		 817 switch (status) {
818 case SPIDER_NET_DESCR_COMPLETE:
09f75cd7
JG		 819 dev->stats.tx_packets++;
820 dev->stats.tx_bytes += descr->skb->len;
bdd01503
JO		 821 break;
822
823 case SPIDER_NET_DESCR_CARDOWNED:
9cc7bf7e
LV		 824 if (!brutal) {
825 spin_unlock_irqrestore(&chain->lock, flags);
bdd01503 826 return 1;
9cc7bf7e
LV		 827 }
828
bdd01503
JO		 829 /* fallthrough, if we release the descriptors
830 * brutally (then we don't care about
831 * SPIDER_NET_DESCR_CARDOWNED) */
832
833 case SPIDER_NET_DESCR_RESPONSE_ERROR:
834 case SPIDER_NET_DESCR_PROTECTION_ERROR:
835 case SPIDER_NET_DESCR_FORCE_END:
836 if (netif_msg_tx_err(card))
e6311d85
LV		 837 dev_err(&card->netdev->dev, "forcing end of tx descriptor "
838 "with status x%02x\n", status);
09f75cd7 839 dev->stats.tx_errors++;
bdd01503
JO		 840 break;
841
842 default:
09f75cd7 843 dev->stats.tx_dropped++;
9cc7bf7e
LV		 844 if (!brutal) {
845 spin_unlock_irqrestore(&chain->lock, flags);
c3fee4c5 846 return 1;
9cc7bf7e 847 }
bdd01503 848 }
aaec0fab 849
9cc7bf7e 850 chain->tail = descr->next;
4cb6f9e5 851 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
9cc7bf7e 852 skb = descr->skb;
d9c199ee 853 descr->skb = NULL;
4cb6f9e5 854 buf_addr = hwdescr->buf_addr;
9cc7bf7e
LV		 855 spin_unlock_irqrestore(&chain->lock, flags);
856
857 /* unmap the skb */
858 if (skb) {
9c434f5e
JL		 859 pci_unmap_single(card->pdev, buf_addr, skb->len,
860 PCI_DMA_TODEVICE);
9cc7bf7e
LV		 861 dev_kfree_skb(skb);
862 }
863 }
aaec0fab
JO		 864 return 0;
865}
866
867/**
868 * spider_net_kick_tx_dma - enables TX DMA processing
869 * @card: card structure
aaec0fab 870 *
a664ccf4
LV		 871 * This routine will start the transmit DMA running if
872 * it is not already running. This routine ned only be
873 * called when queueing a new packet to an empty tx queue.
874 * Writes the current tx chain head as start address
875 * of the tx descriptor chain and enables the transmission
876 * DMA engine.
aaec0fab 877 */
bdd01503
JO		 878static inline void
879spider_net_kick_tx_dma(struct spider_net_card *card)
aaec0fab 880{
bdd01503 881 struct spider_net_descr *descr;
aaec0fab 882
bdd01503
JO		 883 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
884 SPIDER_NET_TX_DMA_EN)
885 goto out;
aaec0fab 886
bdd01503
JO		 887 descr = card->tx_chain.tail;
888 for (;;) {
4cb6f9e5 889 if (spider_net_get_descr_status(descr->hwdescr) ==
bdd01503
JO		 890 SPIDER_NET_DESCR_CARDOWNED) {
891 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
892 descr->bus_addr);
893 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
894 SPIDER_NET_DMA_TX_VALUE);
895 break;
896 }
897 if (descr == card->tx_chain.head)
898 break;
899 descr = descr->next;
900 }
901
902out:
903 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
aaec0fab
JO		 904}
905
906/**
907 * spider_net_xmit - transmits a frame over the device
908 * @skb: packet to send out
909 * @netdev: interface device structure
910 *
bdd01503 911 * returns 0 on success, !0 on failure
aaec0fab
JO		 912 */
913static int
914spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
915{
a664ccf4 916 int cnt;
aaec0fab 917 struct spider_net_card *card = netdev_priv(netdev);
bdd01503 918
11f1a52b 919 spider_net_release_tx_chain(card, 0);
aaec0fab 920
d9c199ee 921 if (spider_net_prepare_tx_descr(card, skb) != 0) {
09f75cd7 922 netdev->stats.tx_dropped++;
313ef4b7
LV		 923 netif_stop_queue(netdev);
924 return NETDEV_TX_BUSY;
bdd01503 925 }
aaec0fab 926
a664ccf4
LV		 927 cnt = spider_net_set_low_watermark(card);
928 if (cnt < 5)
929 spider_net_kick_tx_dma(card);
313ef4b7 930 return NETDEV_TX_OK;
bdd01503 931}
11f1a52b 932
bdd01503
JO		 933/**
934 * spider_net_cleanup_tx_ring - cleans up the TX ring
935 * @card: card structure
936 *
68a8c609
LV		 937 * spider_net_cleanup_tx_ring is called by either the tx_timer
938 * or from the NAPI polling routine.
939 * This routine releases resources associted with transmitted
940 * packets, including updating the queue tail pointer.
bdd01503
JO		 941 */
942static void
943spider_net_cleanup_tx_ring(struct spider_net_card *card)
944{
bdd01503 945 if ((spider_net_release_tx_chain(card, 0) != 0) &&
313ef4b7 946 (card->netdev->flags & IFF_UP)) {
bdd01503 947 spider_net_kick_tx_dma(card);
313ef4b7
LV		 948 netif_wake_queue(card->netdev);
949 }
aaec0fab
JO		 950}
951
952/**
953 * spider_net_do_ioctl - called for device ioctls
954 * @netdev: interface device structure
955 * @ifr: request parameter structure for ioctl
956 * @cmd: command code for ioctl
957 *
958 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
959 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
960 */
961static int
962spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
963{
964 switch (cmd) {
965 default:
966 return -EOPNOTSUPP;
967 }
968}
969
970/**
971 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
972 * @descr: descriptor to process
973 * @card: card structure
974 *
05b346b5
LV		 975 * Fills out skb structure and passes the data to the stack.
976 * The descriptor state is not changed.
aaec0fab 977 */
7f7223b8 978static void
aaec0fab 979spider_net_pass_skb_up(struct spider_net_descr *descr,
1cd173f6 980 struct spider_net_card *card)
aaec0fab 981{
09f75cd7
JG		 982 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
983 struct sk_buff *skb = descr->skb;
984 struct net_device *netdev = card->netdev;
985 u32 data_status = hwdescr->data_status;
986 u32 data_error = hwdescr->data_error;
aaec0fab 987
4cb6f9e5 988 skb_put(skb, hwdescr->valid_size);
aaec0fab
JO		 989
990 /* the card seems to add 2 bytes of junk in front
991 * of the ethernet frame */
992#define SPIDER_MISALIGN 2
993 skb_pull(skb, SPIDER_MISALIGN);
994 skb->protocol = eth_type_trans(skb, netdev);
995
996 /* checksum offload */
997 if (card->options.rx_csum) {
11f1a52b
AB		 998 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
999 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
1000 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
aaec0fab
JO		 1001 skb->ip_summed = CHECKSUM_UNNECESSARY;
1002 else
bc8acf2c 1003 skb_checksum_none_assert(skb);
11f1a52b 1004 } else
bc8acf2c 1005 skb_checksum_none_assert(skb);
aaec0fab
JO		 1006
1007 if (data_status & SPIDER_NET_VLAN_PACKET) {
1008 /* further enhancements: HW-accel VLAN
1009 * vlan_hwaccel_receive_skb
1010 */
1011 }
1012
aaec0fab 1013 /* update netdevice statistics */
09f75cd7
JG		 1014 netdev->stats.rx_packets++;
1015 netdev->stats.rx_bytes += skb->len;
93c1d3b7
FM		 1016
1017 /* pass skb up to stack */
1018 netif_receive_skb(skb);
aaec0fab
JO		 1019}
1020
6d24998f
LV		 1021static void show_rx_chain(struct spider_net_card *card)
1022{
1023 struct spider_net_descr_chain *chain = &card->rx_chain;
1024 struct spider_net_descr *start= chain->tail;
1025 struct spider_net_descr *descr= start;
9948357d
LV		 1026 struct spider_net_hw_descr *hwd = start->hwdescr;
1027 struct device *dev = &card->netdev->dev;
1028 u32 curr_desc, next_desc;
6d24998f
LV		 1029 int status;
1030
9948357d 1031 int tot = 0;
6d24998f 1032 int cnt = 0;
9948357d
LV		 1033 int off = start - chain->ring;
1034 int cstat = hwd->dmac_cmd_status;
1035
1036 dev_info(dev, "Total number of descrs=%d\n",
1037 chain->num_desc);
1038 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
1039 off, cstat);
1040
1041 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
1042 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
1043
6d24998f
LV		 1044 status = cstat;
1045 do
1046 {
9948357d
LV		 1047 hwd = descr->hwdescr;
1048 off = descr - chain->ring;
1049 status = hwd->dmac_cmd_status;
1050
1051 if (descr == chain->head)
1052 dev_info(dev, "Chain head is at %d, head status=0x%x\n",
1053 off, status);
1054
1055 if (curr_desc == descr->bus_addr)
1056 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
1057 off, status);
1058
1059 if (next_desc == descr->bus_addr)
1060 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
1061 off, status);
1062
1063 if (hwd->next_descr_addr == 0)
1064 dev_info(dev, "chain is cut at %d\n", off);
1065
6d24998f 1066 if (cstat != status) {
9948357d
LV		 1067 int from = (chain->num_desc + off - cnt) % chain->num_desc;
1068 int to = (chain->num_desc + off - 1) % chain->num_desc;
1069 dev_info(dev, "Have %d (from %d to %d) descrs "
1070 "with stat=0x%08x\n", cnt, from, to, cstat);
6d24998f
LV		 1071 cstat = status;
1072 cnt = 0;
1073 }
9948357d 1074
6d24998f 1075 cnt ++;
9948357d
LV		 1076 tot ++;
1077 descr = descr->next;
1078 } while (descr != start);
1079
1080 dev_info(dev, "Last %d descrs with stat=0x%08x "
1081 "for a total of %d descrs\n", cnt, cstat, tot);
1082
1083#ifdef DEBUG
1084 /* Now dump the whole ring */
1085 descr = start;
1086 do
1087 {
1088 struct spider_net_hw_descr *hwd = descr->hwdescr;
1089 status = spider_net_get_descr_status(hwd);
1090 cnt = descr - chain->ring;
1091 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
1092 cnt, status, descr->skb);
1093 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
1094 descr->bus_addr, hwd->buf_addr, hwd->buf_size);
1095 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
1096 hwd->next_descr_addr, hwd->result_size,
1097 hwd->valid_size);
1098 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
1099 hwd->dmac_cmd_status, hwd->data_status,
1100 hwd->data_error);
1101 dev_info(dev, "\n");
1102
6d24998f
LV		 1103 descr = descr->next;
1104 } while (descr != start);
6d24998f
LV		 1105#endif
1106
9948357d
LV		 1107}
1108
4c4bd5a9
LV		 1109/**
1110 * spider_net_resync_head_ptr - Advance head ptr past empty descrs
1111 *
1112 * If the driver fails to keep up and empty the queue, then the
1113 * hardware wil run out of room to put incoming packets. This
1114 * will cause the hardware to skip descrs that are full (instead
1115 * of halting/retrying). Thus, once the driver runs, it wil need
1116 * to "catch up" to where the hardware chain pointer is at.
1117 */
1118static void spider_net_resync_head_ptr(struct spider_net_card *card)
1119{
1120 unsigned long flags;
1121 struct spider_net_descr_chain *chain = &card->rx_chain;
1122 struct spider_net_descr *descr;
1123 int i, status;
1124
1125 /* Advance head pointer past any empty descrs */
1126 descr = chain->head;
1127 status = spider_net_get_descr_status(descr->hwdescr);
1128
1129 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
1130 return;
1131
1132 spin_lock_irqsave(&chain->lock, flags);
1133
1134 descr = chain->head;
1135 status = spider_net_get_descr_status(descr->hwdescr);
1136 for (i=0; i<chain->num_desc; i++) {
1137 if (status != SPIDER_NET_DESCR_CARDOWNED) break;
1138 descr = descr->next;
1139 status = spider_net_get_descr_status(descr->hwdescr);
1140 }
1141 chain->head = descr;
1142
1143 spin_unlock_irqrestore(&chain->lock, flags);
1144}
1145
1146static int spider_net_resync_tail_ptr(struct spider_net_card *card)
1147{
1148 struct spider_net_descr_chain *chain = &card->rx_chain;
1149 struct spider_net_descr *descr;
1150 int i, status;
1151
1152 /* Advance tail pointer past any empty and reaped descrs */
1153 descr = chain->tail;
1154 status = spider_net_get_descr_status(descr->hwdescr);
1155
1156 for (i=0; i<chain->num_desc; i++) {
1157 if ((status != SPIDER_NET_DESCR_CARDOWNED) &&
1158 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break;
1159 descr = descr->next;
1160 status = spider_net_get_descr_status(descr->hwdescr);
1161 }
1162 chain->tail = descr;
1163
1164 if ((i == chain->num_desc) || (i == 0))
1165 return 1;
1166 return 0;
1167}
1168
aaec0fab 1169/**
7376e732 1170 * spider_net_decode_one_descr - processes an RX descriptor
aaec0fab
JO		 1171 * @card: card structure
1172 *
7376e732 1173 * Returns 1 if a packet has been sent to the stack, otherwise 0.
aaec0fab 1174 *
7376e732
LV		 1175 * Processes an RX descriptor by iommu-unmapping the data buffer
1176 * and passing the packet up to the stack. This function is called
1177 * in softirq context, e.g. either bottom half from interrupt or
1178 * NAPI polling context.
aaec0fab
JO		 1179 */
1180static int
1cd173f6 1181spider_net_decode_one_descr(struct spider_net_card *card)
aaec0fab 1182{
09f75cd7 1183 struct net_device *dev = card->netdev;
bdd01503
JO		 1184 struct spider_net_descr_chain *chain = &card->rx_chain;
1185 struct spider_net_descr *descr = chain->tail;
4cb6f9e5 1186 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
9e0a6e25 1187 u32 hw_buf_addr;
bdd01503 1188 int status;
aaec0fab 1189
4cb6f9e5 1190 status = spider_net_get_descr_status(hwdescr);
aaec0fab 1191
80dab7c7
LV		 1192 /* Nothing in the descriptor, or ring must be empty */
1193 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1194 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1cd173f6 1195 return 0;
aaec0fab 1196
11f1a52b 1197 /* descriptor definitively used -- move on tail */
aaec0fab
JO		 1198 chain->tail = descr->next;
1199
05b346b5 1200 /* unmap descriptor */
9e0a6e25
LV		 1201 hw_buf_addr = hwdescr->buf_addr;
1202 hwdescr->buf_addr = 0xffffffff;
1203 pci_unmap_single(card->pdev, hw_buf_addr,
05b346b5
LV		 1204 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1205
aaec0fab
JO		 1206 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1207 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1208 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1209 if (netif_msg_rx_err(card))
09f75cd7 1210 dev_err(&dev->dev,
e6311d85 1211 "dropping RX descriptor with state %d\n", status);
09f75cd7 1212 dev->stats.rx_dropped++;
7f7223b8 1213 goto bad_desc;
aaec0fab
JO		 1214 }
1215
1216 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1217 (status != SPIDER_NET_DESCR_FRAME_END) ) {
5a028877 1218 if (netif_msg_rx_err(card))
e6311d85
LV		 1219 dev_err(&card->netdev->dev,
1220 "RX descriptor with unknown state %d\n", status);
5a028877 1221 card->spider_stats.rx_desc_unk_state++;
7f7223b8 1222 goto bad_desc;
aaec0fab
JO		 1223 }
1224
366684bd 1225 /* The cases we'll throw away the packet immediately */
4cb6f9e5 1226 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
366684bd 1227 if (netif_msg_rx_err(card))
e6311d85
LV		 1228 dev_err(&card->netdev->dev,
1229 "error in received descriptor found, "
366684bd 1230 "data_status=x%08x, data_error=x%08x\n",
4cb6f9e5 1231 hwdescr->data_status, hwdescr->data_error);
7f7223b8 1232 goto bad_desc;
366684bd
LV		 1233 }
1234
e65bbf13 1235 if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) {
e6311d85 1236 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n",
4cb6f9e5 1237 hwdescr->dmac_cmd_status);
9e0a6e25 1238 pr_err("buf_addr=x%08x\n", hw_buf_addr);
4cb6f9e5
LV		 1239 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1240 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1241 pr_err("result_size=x%08x\n", hwdescr->result_size);
1242 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1243 pr_err("data_status=x%08x\n", hwdescr->data_status);
1244 pr_err("data_error=x%08x\n", hwdescr->data_error);
6d24998f
LV		 1245 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1246
1247 card->spider_stats.rx_desc_error++;
1248 goto bad_desc;
1249 }
1250
7f7223b8
LV		 1251 /* Ok, we've got a packet in descr */
1252 spider_net_pass_skb_up(descr, card);
83d35145 1253 descr->skb = NULL;
4cb6f9e5 1254 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
7f7223b8
LV		 1255 return 1;
1256
1257bad_desc:
9948357d
LV		 1258 if (netif_msg_rx_err(card))
1259 show_rx_chain(card);
7f7223b8 1260 dev_kfree_skb_irq(descr->skb);
d9c199ee 1261 descr->skb = NULL;
4cb6f9e5 1262 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
7f7223b8 1263 return 0;
aaec0fab
JO		 1264}
1265
1266/**
1267 * spider_net_poll - NAPI poll function called by the stack to return packets
1268 * @netdev: interface device structure
1269 * @budget: number of packets we can pass to the stack at most
1270 *
1271 * returns 0 if no more packets available to the driver/stack. Returns 1,
1272 * if the quota is exceeded, but the driver has still packets.
1273 *
1274 * spider_net_poll returns all packets from the rx descriptors to the stack
1275 * (using netif_receive_skb). If all/enough packets are up, the driver
1276 * reenables interrupts and returns 0. If not, 1 is returned.
1277 */
bea3348e 1278static int spider_net_poll(struct napi_struct *napi, int budget)
aaec0fab 1279{
bea3348e 1280 struct spider_net_card *card = container_of(napi, struct spider_net_card, napi);
bea3348e
SH		 1281 int packets_done = 0;
1282
1283 while (packets_done < budget) {
1284 if (!spider_net_decode_one_descr(card))
aaec0fab 1285 break;
bea3348e
SH		 1286
1287 packets_done++;
aaec0fab
JO		 1288 }
1289
4c4bd5a9 1290 if ((packets_done == 0) && (card->num_rx_ints != 0)) {
bea3348e
SH		 1291 if (!spider_net_resync_tail_ptr(card))
1292 packets_done = budget;
4c4bd5a9
LV		 1293 spider_net_resync_head_ptr(card);
1294 }
1295 card->num_rx_ints = 0;
1296
11f1a52b 1297 spider_net_refill_rx_chain(card);
80dab7c7 1298 spider_net_enable_rxdmac(card);
aaec0fab 1299
e1fd9070
LV		 1300 spider_net_cleanup_tx_ring(card);
1301
aaec0fab
JO		 1302 /* if all packets are in the stack, enable interrupts and return 0 */
1303 /* if not, return 1 */
bea3348e 1304 if (packets_done < budget) {
288379f0 1305 napi_complete(napi);
aaec0fab 1306 spider_net_rx_irq_on(card);
c3d1182a 1307 card->ignore_rx_ramfull = 0;
aaec0fab
JO		 1308 }
1309
bea3348e 1310 return packets_done;
aaec0fab
JO		 1311}
1312
aaec0fab
JO		 1313/**
1314 * spider_net_change_mtu - changes the MTU of an interface
1315 * @netdev: interface device structure
1316 * @new_mtu: new MTU value
1317 *
1318 * returns 0 on success, <0 on failure
1319 */
1320static int
1321spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1322{
1323 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1324 * and mtu is outbound only anyway */
1325 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1326 (new_mtu > SPIDER_NET_MAX_MTU) )
1327 return -EINVAL;
1328 netdev->mtu = new_mtu;
1329 return 0;
1330}
1331
1332/**
1333 * spider_net_set_mac - sets the MAC of an interface
1334 * @netdev: interface device structure
1335 * @ptr: pointer to new MAC address
1336 *
1337 * Returns 0 on success, <0 on failure. Currently, we don't support this
1338 * and will always return EOPNOTSUPP.
1339 */
1340static int
1341spider_net_set_mac(struct net_device *netdev, void *p)
1342{
1343 struct spider_net_card *card = netdev_priv(netdev);
054034db 1344 u32 macl, macu, regvalue;
aaec0fab
JO		 1345 struct sockaddr *addr = p;
1346
aaec0fab
JO		 1347 if (!is_valid_ether_addr(addr->sa_data))
1348 return -EADDRNOTAVAIL;
1349
054034db
JO		 1350 /* switch off GMACTPE and GMACRPE */
1351 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1352 regvalue &= ~((1 << 5) | (1 << 6));
1353 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1354
1355 /* write mac */
aaec0fab
JO		 1356 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1357 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1358 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1359 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1360 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1361
054034db
JO		 1362 /* switch GMACTPE and GMACRPE back on */
1363 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1364 regvalue |= ((1 << 5) | (1 << 6));
1365 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1366
aaec0fab
JO		 1367 spider_net_set_promisc(card);
1368
1369 /* look up, whether we have been successful */
1370 if (spider_net_get_mac_address(netdev))
1371 return -EADDRNOTAVAIL;
1372 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1373 return -EADDRNOTAVAIL;
1374
1375 return 0;
1376}
1377
abdb66b5
KI		 1378/**
1379 * spider_net_link_reset
1380 * @netdev: net device structure
1381 *
1382 * This is called when the PHY_LINK signal is asserted. For the blade this is
1383 * not connected so we should never get here.
1384 *
1385 */
1386static void
1387spider_net_link_reset(struct net_device *netdev)
1388{
1389
1390 struct spider_net_card *card = netdev_priv(netdev);
1391
1392 del_timer_sync(&card->aneg_timer);
1393
1394 /* clear interrupt, block further interrupts */
1395 spider_net_write_reg(card, SPIDER_NET_GMACST,
1396 spider_net_read_reg(card, SPIDER_NET_GMACST));
1397 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1398
1399 /* reset phy and setup aneg */
81971bef
IK		 1400 card->aneg_count = 0;
1401 card->medium = BCM54XX_COPPER;
abdb66b5
KI		 1402 spider_net_setup_aneg(card);
1403 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1404
1405}
1406
aaec0fab
JO		 1407/**
1408 * spider_net_handle_error_irq - handles errors raised by an interrupt
1409 * @card: card structure
1410 * @status_reg: interrupt status register 0 (GHIINT0STS)
1411 *
1412 * spider_net_handle_error_irq treats or ignores all error conditions
1413 * found when an interrupt is presented
1414 */
1415static void
9a11fcb5
IK		 1416spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
1417 u32 error_reg1, u32 error_reg2)
aaec0fab 1418{
aaec0fab
JO		 1419 u32 i;
1420 int show_error = 1;
1421
aaec0fab
JO		 1422 /* check GHIINT0STS ************************************/
1423 if (status_reg)
1424 for (i = 0; i < 32; i++)
1425 if (status_reg & (1<<i))
1426 switch (i)
1427 {
1428 /* let error_reg1 and error_reg2 evaluation decide, what to do
1429 case SPIDER_NET_PHYINT:
1430 case SPIDER_NET_GMAC2INT:
1431 case SPIDER_NET_GMAC1INT:
aaec0fab
JO		 1432 case SPIDER_NET_GFIFOINT:
1433 case SPIDER_NET_DMACINT:
1434 case SPIDER_NET_GSYSINT:
1435 break; */
1436
98b9040c
LV		 1437 case SPIDER_NET_GIPSINT:
1438 show_error = 0;
1439 break;
1440
aaec0fab
JO		 1441 case SPIDER_NET_GPWOPCMPINT:
1442 /* PHY write operation completed */
1443 show_error = 0;
1444 break;
1445 case SPIDER_NET_GPROPCMPINT:
1446 /* PHY read operation completed */
1447 /* we don't use semaphores, as we poll for the completion
1448 * of the read operation in spider_net_read_phy. Should take
1449 * about 50 us */
1450 show_error = 0;
1451 break;
1452 case SPIDER_NET_GPWFFINT:
1453 /* PHY command queue full */
1454 if (netif_msg_intr(card))
e6311d85 1455 dev_err(&card->netdev->dev, "PHY write queue full\n");
aaec0fab
JO		 1456 show_error = 0;
1457 break;
1458
1459 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1460 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1461 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1462
1463 case SPIDER_NET_GDTDEN0INT:
1464 /* someone has set TX_DMA_EN to 0 */
1465 show_error = 0;
1466 break;
1467
1468 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1469 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1470 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1471 case SPIDER_NET_GDADEN0INT:
1472 /* someone has set RX_DMA_EN to 0 */
1473 show_error = 0;
1474 break;
1475
1476 /* RX interrupts */
1477 case SPIDER_NET_GDDFDCINT:
1478 case SPIDER_NET_GDCFDCINT:
1479 case SPIDER_NET_GDBFDCINT:
1480 case SPIDER_NET_GDAFDCINT:
1481 /* case SPIDER_NET_GDNMINT: not used. print a message */
1482 /* case SPIDER_NET_GCNMINT: not used. print a message */
1483 /* case SPIDER_NET_GBNMINT: not used. print a message */
1484 /* case SPIDER_NET_GANMINT: not used. print a message */
1485 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1486 show_error = 0;
1487 break;
1488
1489 /* TX interrupts */
1490 case SPIDER_NET_GDTFDCINT:
1491 show_error = 0;
1492 break;
1493 case SPIDER_NET_GTTEDINT:
1494 show_error = 0;
1495 break;
1496 case SPIDER_NET_GDTDCEINT:
1497 /* chain end. If a descriptor should be sent, kick off
1498 * tx dma
98b9040c 1499 if (card->tx_chain.tail != card->tx_chain.head)
aaec0fab 1500 spider_net_kick_tx_dma(card);
98b9040c
LV		 1501 */
1502 show_error = 0;
aaec0fab
JO		 1503 break;
1504
1505 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1506 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1507 }
1508
1509 /* check GHIINT1STS ************************************/
1510 if (error_reg1)
1511 for (i = 0; i < 32; i++)
1512 if (error_reg1 & (1<<i))
1513 switch (i)
1514 {
1515 case SPIDER_NET_GTMFLLINT:
fc8e13da
IK		 1516 /* TX RAM full may happen on a usual case.
1517 * Logging is not needed. */
aaec0fab
JO		 1518 show_error = 0;
1519 break;
11f1a52b
AB		 1520 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1521 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1522 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1523 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
aaec0fab 1524 case SPIDER_NET_GRMFLLINT:
4c4bd5a9 1525 /* Could happen when rx chain is full */
c3d1182a
LV		 1526 if (card->ignore_rx_ramfull == 0) {
1527 card->ignore_rx_ramfull = 1;
1528 spider_net_resync_head_ptr(card);
1529 spider_net_refill_rx_chain(card);
1530 spider_net_enable_rxdmac(card);
1531 card->num_rx_ints ++;
288379f0 1532 napi_schedule(&card->napi);
c3d1182a 1533 }
11f1a52b 1534 show_error = 0;
aaec0fab
JO		 1535 break;
1536
1537 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1538 case SPIDER_NET_GDTINVDINT:
1539 /* allrighty. tx from previous descr ok */
1540 show_error = 0;
1541 break;
aaec0fab
JO		 1542
1543 /* chain end */
1544 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1545 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1546 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1547 case SPIDER_NET_GDADCEINT:
4c4bd5a9 1548 spider_net_resync_head_ptr(card);
aaec0fab 1549 spider_net_refill_rx_chain(card);
11f1a52b 1550 spider_net_enable_rxdmac(card);
4c4bd5a9 1551 card->num_rx_ints ++;
288379f0 1552 napi_schedule(&card->napi);
aaec0fab
JO		 1553 show_error = 0;
1554 break;
1555
1556 /* invalid descriptor */
1557 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1558 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1559 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1560 case SPIDER_NET_GDAINVDINT:
4c4bd5a9
LV		 1561 /* Could happen when rx chain is full */
1562 spider_net_resync_head_ptr(card);
aaec0fab 1563 spider_net_refill_rx_chain(card);
11f1a52b 1564 spider_net_enable_rxdmac(card);
4c4bd5a9 1565 card->num_rx_ints ++;
288379f0 1566 napi_schedule(&card->napi);
aaec0fab
JO		 1567 show_error = 0;
1568 break;
1569
1570 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1571 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1572 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1573 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1574 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1575 /* case SPIDER_NET_GDSERINT: problem, print a message */
1576 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1577 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1578 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1579 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1580 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1581 default:
1582 show_error = 1;
1583 break;
1584 }
1585
1586 /* check GHIINT2STS ************************************/
1587 if (error_reg2)
1588 for (i = 0; i < 32; i++)
1589 if (error_reg2 & (1<<i))
1590 switch (i)
1591 {
1592 /* there is nothing we can (want to) do at this time. Log a
1593 * message, we can switch on and off the specific values later on
1594 case SPIDER_NET_GPROPERINT:
1595 case SPIDER_NET_GMCTCRSNGINT:
1596 case SPIDER_NET_GMCTLCOLINT:
1597 case SPIDER_NET_GMCTTMOTINT:
1598 case SPIDER_NET_GMCRCAERINT:
1599 case SPIDER_NET_GMCRCALERINT:
1600 case SPIDER_NET_GMCRALNERINT:
1601 case SPIDER_NET_GMCROVRINT:
1602 case SPIDER_NET_GMCRRNTINT:
1603 case SPIDER_NET_GMCRRXERINT:
1604 case SPIDER_NET_GTITCSERINT:
1605 case SPIDER_NET_GTIFMTERINT:
1606 case SPIDER_NET_GTIPKTRVKINT:
1607 case SPIDER_NET_GTISPINGINT:
1608 case SPIDER_NET_GTISADNGINT:
1609 case SPIDER_NET_GTISPDNGINT:
1610 case SPIDER_NET_GRIFMTERINT:
1611 case SPIDER_NET_GRIPKTRVKINT:
1612 case SPIDER_NET_GRISPINGINT:
1613 case SPIDER_NET_GRISADNGINT:
1614 case SPIDER_NET_GRISPDNGINT:
1615 break;
1616 */
1617 default:
1618 break;
1619 }
1620
5a028877 1621 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
e6311d85 1622 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, "
aaec0fab
JO		 1623 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1624 status_reg, error_reg1, error_reg2);
1625
1626 /* clear interrupt sources */
1627 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1628 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1629}
1630
1631/**
1632 * spider_net_interrupt - interrupt handler for spider_net
3a4fa0a2 1633 * @irq: interrupt number
aaec0fab 1634 * @ptr: pointer to net_device
aaec0fab
JO		 1635 *
1636 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1637 * interrupt found raised by card.
1638 *
1639 * This is the interrupt handler, that turns off
1640 * interrupts for this device and makes the stack poll the driver
1641 */
1642static irqreturn_t
7d12e780 1643spider_net_interrupt(int irq, void *ptr)
aaec0fab
JO		 1644{
1645 struct net_device *netdev = ptr;
1646 struct spider_net_card *card = netdev_priv(netdev);
9a11fcb5 1647 u32 status_reg, error_reg1, error_reg2;
aaec0fab
JO		 1648
1649 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
9a11fcb5
IK		 1650 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1651 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
aaec0fab 1652
9a11fcb5
IK		 1653 if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) &&
1654 !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) &&
1655 !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE))
aaec0fab
JO		 1656 return IRQ_NONE;
1657
aaec0fab
JO		 1658 if (status_reg & SPIDER_NET_RXINT ) {
1659 spider_net_rx_irq_off(card);
288379f0 1660 napi_schedule(&card->napi);
4c4bd5a9 1661 card->num_rx_ints ++;
aaec0fab 1662 }
68a8c609 1663 if (status_reg & SPIDER_NET_TXINT)
288379f0 1664 napi_schedule(&card->napi);
aaec0fab 1665
abdb66b5
KI		 1666 if (status_reg & SPIDER_NET_LINKINT)
1667 spider_net_link_reset(netdev);
1668
11f1a52b 1669 if (status_reg & SPIDER_NET_ERRINT )
9a11fcb5
IK		 1670 spider_net_handle_error_irq(card, status_reg,
1671 error_reg1, error_reg2);
aaec0fab
JO		 1672
1673 /* clear interrupt sources */
1674 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1675
1676 return IRQ_HANDLED;
1677}
1678
1679#ifdef CONFIG_NET_POLL_CONTROLLER
1680/**
1681 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1682 * @netdev: interface device structure
1683 *
1684 * see Documentation/networking/netconsole.txt
1685 */
1686static void
1687spider_net_poll_controller(struct net_device *netdev)
1688{
1689 disable_irq(netdev->irq);
7d12e780 1690 spider_net_interrupt(netdev->irq, netdev);
aaec0fab
JO		 1691 enable_irq(netdev->irq);
1692}
1693#endif /* CONFIG_NET_POLL_CONTROLLER */
1694
7a627558
IK		 1695/**
1696 * spider_net_enable_interrupts - enable interrupts
1697 * @card: card structure
1698 *
1699 * spider_net_enable_interrupt enables several interrupts
1700 */
7d2e3cb7 1701static void
7a627558
IK		 1702spider_net_enable_interrupts(struct spider_net_card *card)
1703{
1704 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1705 SPIDER_NET_INT0_MASK_VALUE);
1706 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1707 SPIDER_NET_INT1_MASK_VALUE);
1708 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1709 SPIDER_NET_INT2_MASK_VALUE);
1710}
1711
1712/**
1713 * spider_net_disable_interrupts - disable interrupts
1714 * @card: card structure
1715 *
1716 * spider_net_disable_interrupts disables all the interrupts
1717 */
7d2e3cb7 1718static void
7a627558
IK		 1719spider_net_disable_interrupts(struct spider_net_card *card)
1720{
1721 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1722 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1723 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1724 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1725}
1726
aaec0fab
JO		 1727/**
1728 * spider_net_init_card - initializes the card
1729 * @card: card structure
1730 *
1731 * spider_net_init_card initializes the card so that other registers can
1732 * be used
1733 */
1734static void
1735spider_net_init_card(struct spider_net_card *card)
1736{
1737 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1738 SPIDER_NET_CKRCTRL_STOP_VALUE);
1739
1740 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1741 SPIDER_NET_CKRCTRL_RUN_VALUE);
3342cf0e
KI		 1742
1743 /* trigger ETOMOD signal */
1744 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1745 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1746
7a627558 1747 spider_net_disable_interrupts(card);
aaec0fab
JO		 1748}
1749
1750/**
1751 * spider_net_enable_card - enables the card by setting all kinds of regs
1752 * @card: card structure
1753 *
1754 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1755 */
1756static void
1757spider_net_enable_card(struct spider_net_card *card)
1758{
1759 int i;
1760 /* the following array consists of (register),(value) pairs
1761 * that are set in this function. A register of 0 ends the list */
1762 u32 regs[][2] = {
1763 { SPIDER_NET_GRESUMINTNUM, 0 },
1764 { SPIDER_NET_GREINTNUM, 0 },
1765
1766 /* set interrupt frame number registers */
1767 /* clear the single DMA engine registers first */
1768 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1769 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1770 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1771 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1772 /* then set, what we really need */
1773 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1774
1775 /* timer counter registers and stuff */
1776 { SPIDER_NET_GFREECNNUM, 0 },
1777 { SPIDER_NET_GONETIMENUM, 0 },
1778 { SPIDER_NET_GTOUTFRMNUM, 0 },
1779
1780 /* RX mode setting */
1781 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1782 /* TX mode setting */
1783 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1784 /* IPSEC mode setting */
1785 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1786
1787 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1788
1789 { SPIDER_NET_GMRWOLCTRL, 0 },
b636d17a
JO		 1790 { SPIDER_NET_GTESTMD, 0x10000000 },
1791 { SPIDER_NET_GTTQMSK, 0x00400040 },
aaec0fab
JO		 1792
1793 { SPIDER_NET_GMACINTEN, 0 },
1794
1795 /* flow control stuff */
1796 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1797 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1798
1799 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1800 { 0, 0}
1801 };
1802
1803 i = 0;
1804 while (regs[i][0]) {
1805 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1806 i++;
1807 }
1808
1809 /* clear unicast filter table entries 1 to 14 */
1810 for (i = 1; i <= 14; i++) {
1811 spider_net_write_reg(card,
1812 SPIDER_NET_GMRUAFILnR + i * 8,
1813 0x00080000);
1814 spider_net_write_reg(card,
1815 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1816 0x00000000);
1817 }
1818
1819 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1820
1821 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1822
3ad2f3fb 1823 /* set chain tail address for RX chains and
aaec0fab
JO		 1824 * enable DMA */
1825 spider_net_enable_rxchtails(card);
1826 spider_net_enable_rxdmac(card);
1827
1828 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1829
aaec0fab
JO		 1830 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1831 SPIDER_NET_LENLMT_VALUE);
aaec0fab
JO		 1832 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1833 SPIDER_NET_OPMODE_VALUE);
1834
bdd01503 1835 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
7bd54c86 1836 SPIDER_NET_GDTBSTA);
aaec0fab
JO		 1837}
1838
3cf761dd
KI		 1839/**
1840 * spider_net_download_firmware - loads firmware into the adapter
1841 * @card: card structure
1842 * @firmware_ptr: pointer to firmware data
1843 *
1844 * spider_net_download_firmware loads the firmware data into the
1845 * adapter. It assumes the length etc. to be allright.
1846 */
1847static int
1848spider_net_download_firmware(struct spider_net_card *card,
1849 const void *firmware_ptr)
1850{
1851 int sequencer, i;
1852 const u32 *fw_ptr = firmware_ptr;
1853
1854 /* stop sequencers */
1855 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1856 SPIDER_NET_STOP_SEQ_VALUE);
1857
1858 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1859 sequencer++) {
1860 spider_net_write_reg(card,
1861 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1862 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1863 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1864 sequencer * 8, *fw_ptr);
1865 fw_ptr++;
1866 }
1867 }
1868
1869 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1870 return -EIO;
1871
1872 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1873 SPIDER_NET_RUN_SEQ_VALUE);
1874
1875 return 0;
1876}
1877
1878/**
1879 * spider_net_init_firmware - reads in firmware parts
1880 * @card: card structure
1881 *
1882 * Returns 0 on success, <0 on failure
1883 *
1884 * spider_net_init_firmware opens the sequencer firmware and does some basic
1885 * checks. This function opens and releases the firmware structure. A call
1886 * to download the firmware is performed before the release.
1887 *
1888 * Firmware format
1889 * ===============
1890 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1891 * the program for each sequencer. Use the command
1892 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1893 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1894 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1895 *
1896 * to generate spider_fw.bin, if you have sequencer programs with something
1897 * like the following contents for each sequencer:
1898 * <ONE LINE COMMENT>
1899 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1900 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1901 * ...
1902 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1903 */
1904static int
1905spider_net_init_firmware(struct spider_net_card *card)
1906{
1907 struct firmware *firmware = NULL;
1908 struct device_node *dn;
1909 const u8 *fw_prop = NULL;
1910 int err = -ENOENT;
1911 int fw_size;
1912
1913 if (request_firmware((const struct firmware **)&firmware,
1914 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1915 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1916 netif_msg_probe(card) ) {
e6311d85
LV		 1917 dev_err(&card->netdev->dev,
1918 "Incorrect size of spidernet firmware in " \
3cf761dd
KI		 1919 "filesystem. Looking in host firmware...\n");
1920 goto try_host_fw;
1921 }
1922 err = spider_net_download_firmware(card, firmware->data);
1923
1924 release_firmware(firmware);
1925 if (err)
1926 goto try_host_fw;
1927
1928 goto done;
1929 }
1930
1931try_host_fw:
1932 dn = pci_device_to_OF_node(card->pdev);
1933 if (!dn)
1934 goto out_err;
1935
40cd3a45 1936 fw_prop = of_get_property(dn, "firmware", &fw_size);
3cf761dd
KI		 1937 if (!fw_prop)
1938 goto out_err;
1939
1940 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1941 netif_msg_probe(card) ) {
e6311d85
LV		 1942 dev_err(&card->netdev->dev,
1943 "Incorrect size of spidernet firmware in host firmware\n");
3cf761dd
KI		 1944 goto done;
1945 }
1946
1947 err = spider_net_download_firmware(card, fw_prop);
1948
1949done:
1950 return err;
1951out_err:
1952 if (netif_msg_probe(card))
e6311d85
LV		 1953 dev_err(&card->netdev->dev,
1954 "Couldn't find spidernet firmware in filesystem " \
3cf761dd
KI		 1955 "or host firmware\n");
1956 return err;
1957}
1958
aaec0fab
JO		 1959/**
1960 * spider_net_open - called upon ifonfig up
1961 * @netdev: interface device structure
1962 *
1963 * returns 0 on success, <0 on failure
1964 *
1965 * spider_net_open allocates all the descriptors and memory needed for
1966 * operation, sets up multicast list and enables interrupts
1967 */
1968int
1969spider_net_open(struct net_device *netdev)
1970{
1971 struct spider_net_card *card = netdev_priv(netdev);
d4ed8f8d 1972 int result;
aaec0fab 1973
3cf761dd
KI		 1974 result = spider_net_init_firmware(card);
1975 if (result)
1976 goto init_firmware_failed;
1977
abdb66b5 1978 /* start probing with copper */
81971bef
IK		 1979 card->aneg_count = 0;
1980 card->medium = BCM54XX_COPPER;
abdb66b5
KI		 1981 spider_net_setup_aneg(card);
1982 if (card->phy.def->phy_id)
1983 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1984
d4ed8f8d
LV		 1985 result = spider_net_init_chain(card, &card->tx_chain);
1986 if (result)
aaec0fab 1987 goto alloc_tx_failed;
204e5fa1
LV		 1988 card->low_watermark = NULL;
1989
d4ed8f8d
LV		 1990 result = spider_net_init_chain(card, &card->rx_chain);
1991 if (result)
aaec0fab
JO		 1992 goto alloc_rx_failed;
1993
d4ed8f8d 1994 /* Allocate rx skbs */
aaec0fab
JO		 1995 if (spider_net_alloc_rx_skbs(card))
1996 goto alloc_skbs_failed;
1997
1998 spider_net_set_multi(netdev);
1999
2000 /* further enhancement: setup hw vlan, if needed */
2001
2002 result = -EBUSY;
2003 if (request_irq(netdev->irq, spider_net_interrupt,
1fb9df5d 2004 IRQF_SHARED, netdev->name, netdev))
aaec0fab
JO		 2005 goto register_int_failed;
2006
2007 spider_net_enable_card(card);
2008
543cec51
JO		 2009 netif_start_queue(netdev);
2010 netif_carrier_on(netdev);
bea3348e 2011 napi_enable(&card->napi);
543cec51 2012
7a627558
IK		 2013 spider_net_enable_interrupts(card);
2014
aaec0fab
JO		 2015 return 0;
2016
2017register_int_failed:
2018 spider_net_free_rx_chain_contents(card);
2019alloc_skbs_failed:
2020 spider_net_free_chain(card, &card->rx_chain);
2021alloc_rx_failed:
2022 spider_net_free_chain(card, &card->tx_chain);
2023alloc_tx_failed:
abdb66b5 2024 del_timer_sync(&card->aneg_timer);
3cf761dd 2025init_firmware_failed:
aaec0fab
JO		 2026 return result;
2027}
2028
abdb66b5
KI		 2029/**
2030 * spider_net_link_phy
2031 * @data: used for pointer to card structure
2032 *
2033 */
2034static void spider_net_link_phy(unsigned long data)
2035{
2036 struct spider_net_card *card = (struct spider_net_card *)data;
2037 struct mii_phy *phy = &card->phy;
2038
2039 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
2040 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
2041
0b50d753
IK		 2042 pr_debug("%s: link is down trying to bring it up\n",
2043 card->netdev->name);
abdb66b5 2044
4b23a554
JO		 2045 switch (card->medium) {
2046 case BCM54XX_COPPER:
abdb66b5
KI		 2047 /* enable fiber with autonegotiation first */
2048 if (phy->def->ops->enable_fiber)
2049 phy->def->ops->enable_fiber(phy, 1);
4b23a554 2050 card->medium = BCM54XX_FIBER;
abdb66b5
KI		 2051 break;
2052
4b23a554 2053 case BCM54XX_FIBER:
abdb66b5
KI		 2054 /* fiber didn't come up, try to disable fiber autoneg */
2055 if (phy->def->ops->enable_fiber)
2056 phy->def->ops->enable_fiber(phy, 0);
4b23a554 2057 card->medium = BCM54XX_UNKNOWN;
abdb66b5
KI		 2058 break;
2059
4b23a554 2060 case BCM54XX_UNKNOWN:
abdb66b5
KI		 2061 /* copper, fiber with and without failed,
2062 * retry from beginning */
2063 spider_net_setup_aneg(card);
4b23a554 2064 card->medium = BCM54XX_COPPER;
abdb66b5
KI		 2065 break;
2066 }
2067
2068 card->aneg_count = 0;
2069 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2070 return;
2071 }
2072
2073 /* link still not up, try again later */
2074 if (!(phy->def->ops->poll_link(phy))) {
2075 card->aneg_count++;
2076 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2077 return;
2078 }
2079
2080 /* link came up, get abilities */
2081 phy->def->ops->read_link(phy);
2082
2083 spider_net_write_reg(card, SPIDER_NET_GMACST,
2084 spider_net_read_reg(card, SPIDER_NET_GMACST));
2085 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
2086
2087 if (phy->speed == 1000)
2088 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
2089 else
2090 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
2091
2092 card->aneg_count = 0;
2093
0b50d753
IK		 2094 pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n",
2095 card->netdev->name, phy->speed,
2096 phy->duplex == 1 ? "Full" : "Half",
2097 phy->autoneg == 1 ? "" : "no ");
abdb66b5
KI		 2098}
2099
aaec0fab
JO		 2100/**
2101 * spider_net_setup_phy - setup PHY
2102 * @card: card structure
2103 *
2104 * returns 0 on success, <0 on failure
2105 *
abdb66b5 2106 * spider_net_setup_phy is used as part of spider_net_probe.
aaec0fab
JO		 2107 **/
2108static int
2109spider_net_setup_phy(struct spider_net_card *card)
2110{
2111 struct mii_phy *phy = &card->phy;
2112
2113 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
2114 SPIDER_NET_DMASEL_VALUE);
2115 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
2116 SPIDER_NET_PHY_CTRL_VALUE);
abdb66b5 2117
aaec0fab
JO		 2118 phy->dev = card->netdev;
2119 phy->mdio_read = spider_net_read_phy;
2120 phy->mdio_write = spider_net_write_phy;
2121
abdb66b5
KI		 2122 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
2123 unsigned short id;
2124 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
2125 if (id != 0x0000 && id != 0xffff) {
2126 if (!mii_phy_probe(phy, phy->mii_id)) {
2127 pr_info("Found %s.\n", phy->def->name);
2128 break;
2129 }
2130 }
2131 }
aaec0fab
JO		 2132
2133 return 0;
2134}
2135
aaec0fab
JO		 2136/**
2137 * spider_net_workaround_rxramfull - work around firmware bug
2138 * @card: card structure
2139 *
2140 * no return value
2141 **/
2142static void
2143spider_net_workaround_rxramfull(struct spider_net_card *card)
2144{
2145 int i, sequencer = 0;
2146
2147 /* cancel reset */
2148 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2149 SPIDER_NET_CKRCTRL_RUN_VALUE);
2150
2151 /* empty sequencer data */
11f1a52b
AB		 2152 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2153 sequencer++) {
ee962a5c 2154 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
aaec0fab 2155 sequencer * 8, 0x0);
11f1a52b 2156 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
aaec0fab
JO		 2157 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2158 sequencer * 8, 0x0);
2159 }
2160 }
2161
2162 /* set sequencer operation */
2163 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2164
2165 /* reset */
2166 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2167 SPIDER_NET_CKRCTRL_STOP_VALUE);
2168}
2169
bdd01503
JO		 2170/**
2171 * spider_net_stop - called upon ifconfig down
2172 * @netdev: interface device structure
2173 *
2174 * always returns 0
2175 */
2176int
2177spider_net_stop(struct net_device *netdev)
2178{
2179 struct spider_net_card *card = netdev_priv(netdev);
2180
bea3348e 2181 napi_disable(&card->napi);
bdd01503
JO		 2182 netif_carrier_off(netdev);
2183 netif_stop_queue(netdev);
2184 del_timer_sync(&card->tx_timer);
abdb66b5 2185 del_timer_sync(&card->aneg_timer);
bdd01503 2186
7a627558 2187 spider_net_disable_interrupts(card);
bdd01503 2188
d406eafe 2189 free_irq(netdev->irq, netdev);
bdd01503
JO		 2190
2191 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2192 SPIDER_NET_DMA_TX_FEND_VALUE);
2193
2194 /* turn off DMA, force end */
2195 spider_net_disable_rxdmac(card);
2196
2197 /* release chains */
9cc7bf7e 2198 spider_net_release_tx_chain(card, 1);
d4ed8f8d 2199 spider_net_free_rx_chain_contents(card);
bdd01503
JO		 2200
2201 spider_net_free_chain(card, &card->tx_chain);
2202 spider_net_free_chain(card, &card->rx_chain);
2203
2204 return 0;
2205}
2206
aaec0fab
JO		 2207/**
2208 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2209 * function (to be called not under interrupt status)
2210 * @data: data, is interface device structure
2211 *
2212 * called as task when tx hangs, resets interface (if interface is up)
2213 */
2214static void
c4028958 2215spider_net_tx_timeout_task(struct work_struct *work)
aaec0fab 2216{
c4028958
DH		 2217 struct spider_net_card *card =
2218 container_of(work, struct spider_net_card, tx_timeout_task);
2219 struct net_device *netdev = card->netdev;
aaec0fab
JO		 2220
2221 if (!(netdev->flags & IFF_UP))
2222 goto out;
2223
2224 netif_device_detach(netdev);
2225 spider_net_stop(netdev);
2226
2227 spider_net_workaround_rxramfull(card);
2228 spider_net_init_card(card);
2229
2230 if (spider_net_setup_phy(card))
2231 goto out;
aaec0fab
JO		 2232
2233 spider_net_open(netdev);
bdd01503 2234 spider_net_kick_tx_dma(card);
aaec0fab
JO		 2235 netif_device_attach(netdev);
2236
2237out:
2238 atomic_dec(&card->tx_timeout_task_counter);
2239}
2240
2241/**
2242 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2243 * @netdev: interface device structure
2244 *
2245 * called, if tx hangs. Schedules a task that resets the interface
2246 */
2247static void
2248spider_net_tx_timeout(struct net_device *netdev)
2249{
2250 struct spider_net_card *card;
2251
2252 card = netdev_priv(netdev);
2253 atomic_inc(&card->tx_timeout_task_counter);
2254 if (netdev->flags & IFF_UP)
2255 schedule_work(&card->tx_timeout_task);
2256 else
2257 atomic_dec(&card->tx_timeout_task_counter);
9b6b0b81 2258 card->spider_stats.tx_timeouts++;
aaec0fab
JO		 2259}
2260
6e06cb62 2261static const struct net_device_ops spider_net_ops = {
da4a99e3
DM		 2262 .ndo_open = spider_net_open,
2263 .ndo_stop = spider_net_stop,
2264 .ndo_start_xmit = spider_net_xmit,
2265 .ndo_set_multicast_list = spider_net_set_multi,
2266 .ndo_set_mac_address = spider_net_set_mac,
2267 .ndo_change_mtu = spider_net_change_mtu,
2268 .ndo_do_ioctl = spider_net_do_ioctl,
2269 .ndo_tx_timeout = spider_net_tx_timeout,
3e303dc1 2270 .ndo_validate_addr = eth_validate_addr,
6e06cb62
YH		 2271 /* HW VLAN */
2272#ifdef CONFIG_NET_POLL_CONTROLLER
2273 /* poll controller */
da4a99e3 2274 .ndo_poll_controller = spider_net_poll_controller,
6e06cb62
YH		 2275#endif /* CONFIG_NET_POLL_CONTROLLER */
2276};
2277
aaec0fab
JO		 2278/**
2279 * spider_net_setup_netdev_ops - initialization of net_device operations
2280 * @netdev: net_device structure
2281 *
2282 * fills out function pointers in the net_device structure
2283 */
2284static void
2285spider_net_setup_netdev_ops(struct net_device *netdev)
2286{
6e06cb62 2287 netdev->netdev_ops = &spider_net_ops;
aaec0fab 2288 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
aaec0fab
JO		 2289 /* ethtool ops */
2290 netdev->ethtool_ops = &spider_net_ethtool_ops;
2291}
2292
2293/**
2294 * spider_net_setup_netdev - initialization of net_device
2295 * @card: card structure
2296 *
2297 * Returns 0 on success or <0 on failure
2298 *
2299 * spider_net_setup_netdev initializes the net_device structure
2300 **/
2301static int
2302spider_net_setup_netdev(struct spider_net_card *card)
2303{
2304 int result;
2305 struct net_device *netdev = card->netdev;
2306 struct device_node *dn;
2307 struct sockaddr addr;
1a2509c9 2308 const u8 *mac;
aaec0fab 2309
aaec0fab
JO		 2310 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2311
2312 pci_set_drvdata(card->pdev, netdev);
11f1a52b 2313
11f1a52b
AB		 2314 init_timer(&card->tx_timer);
2315 card->tx_timer.function =
2316 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2317 card->tx_timer.data = (unsigned long) card;
aaec0fab
JO		 2318 netdev->irq = card->pdev->irq;
2319
abdb66b5
KI		 2320 card->aneg_count = 0;
2321 init_timer(&card->aneg_timer);
2322 card->aneg_timer.function = spider_net_link_phy;
2323 card->aneg_timer.data = (unsigned long) card;
2324
aaec0fab
JO		 2325 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2326
bea3348e
SH		 2327 netif_napi_add(netdev, &card->napi,
2328 spider_net_poll, SPIDER_NET_NAPI_WEIGHT);
2329
aaec0fab
JO		 2330 spider_net_setup_netdev_ops(netdev);
2331
3a2c892d 2332 netdev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX;
aaec0fab
JO		 2333 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2334 * NETIF_F_HW_VLAN_FILTER */
2335
2336 netdev->irq = card->pdev->irq;
4c4bd5a9 2337 card->num_rx_ints = 0;
c3d1182a 2338 card->ignore_rx_ramfull = 0;
aaec0fab
JO		 2339
2340 dn = pci_device_to_OF_node(card->pdev);
543cec51
JO		 2341 if (!dn)
2342 return -EIO;
2343
40cd3a45 2344 mac = of_get_property(dn, "local-mac-address", NULL);
543cec51
JO		 2345 if (!mac)
2346 return -EIO;
aaec0fab
JO		 2347 memcpy(addr.sa_data, mac, ETH_ALEN);
2348
2349 result = spider_net_set_mac(netdev, &addr);
2350 if ((result) && (netif_msg_probe(card)))
e6311d85
LV		 2351 dev_err(&card->netdev->dev,
2352 "Failed to set MAC address: %i\n", result);
aaec0fab
JO		 2353
2354 result = register_netdev(netdev);
2355 if (result) {
2356 if (netif_msg_probe(card))
e6311d85
LV		 2357 dev_err(&card->netdev->dev,
2358 "Couldn't register net_device: %i\n", result);
aaec0fab
JO		 2359 return result;
2360 }
2361
2362 if (netif_msg_probe(card))
2363 pr_info("Initialized device %s.\n", netdev->name);
2364
2365 return 0;
2366}
2367
2368/**
2369 * spider_net_alloc_card - allocates net_device and card structure
2370 *
2371 * returns the card structure or NULL in case of errors
2372 *
2373 * the card and net_device structures are linked to each other
2374 */
2375static struct spider_net_card *
2376spider_net_alloc_card(void)
2377{
2378 struct net_device *netdev;
2379 struct spider_net_card *card;
4cb6f9e5 2380 size_t alloc_size;
aaec0fab 2381
4cb6f9e5
LV		 2382 alloc_size = sizeof(struct spider_net_card) +
2383 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2384 netdev = alloc_etherdev(alloc_size);
aaec0fab
JO		 2385 if (!netdev)
2386 return NULL;
2387
2388 card = netdev_priv(netdev);
2389 card->netdev = netdev;
2390 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
c4028958 2391 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
aaec0fab
JO		 2392 init_waitqueue_head(&card->waitq);
2393 atomic_set(&card->tx_timeout_task_counter, 0);
2394
4cb6f9e5
LV		 2395 card->rx_chain.num_desc = rx_descriptors;
2396 card->rx_chain.ring = card->darray;
2397 card->tx_chain.num_desc = tx_descriptors;
2398 card->tx_chain.ring = card->darray + rx_descriptors;
2399
aaec0fab
JO		 2400 return card;
2401}
2402
2403/**
2404 * spider_net_undo_pci_setup - releases PCI ressources
2405 * @card: card structure
2406 *
2407 * spider_net_undo_pci_setup releases the mapped regions
2408 */
2409static void
2410spider_net_undo_pci_setup(struct spider_net_card *card)
2411{
2412 iounmap(card->regs);
2413 pci_release_regions(card->pdev);
2414}
2415
2416/**
2417 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
aaec0fab
JO		 2418 * @pdev: PCI device
2419 *
2420 * Returns the card structure or NULL if any errors occur
2421 *
2422 * spider_net_setup_pci_dev initializes pdev and together with the
2423 * functions called in spider_net_open configures the device so that
2424 * data can be transferred over it
2425 * The net_device structure is attached to the card structure, if the
2426 * function returns without error.
2427 **/
2428static struct spider_net_card *
2429spider_net_setup_pci_dev(struct pci_dev *pdev)
2430{
2431 struct spider_net_card *card;
2432 unsigned long mmio_start, mmio_len;
2433
2434 if (pci_enable_device(pdev)) {
e6311d85 2435 dev_err(&pdev->dev, "Couldn't enable PCI device\n");
aaec0fab
JO		 2436 return NULL;
2437 }
2438
2439 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
e6311d85
LV		 2440 dev_err(&pdev->dev,
2441 "Couldn't find proper PCI device base address.\n");
aaec0fab
JO		 2442 goto out_disable_dev;
2443 }
2444
2445 if (pci_request_regions(pdev, spider_net_driver_name)) {
e6311d85
LV		 2446 dev_err(&pdev->dev,
2447 "Couldn't obtain PCI resources, aborting.\n");
aaec0fab
JO		 2448 goto out_disable_dev;
2449 }
2450
2451 pci_set_master(pdev);
2452
2453 card = spider_net_alloc_card();
2454 if (!card) {
e6311d85
LV		 2455 dev_err(&pdev->dev,
2456 "Couldn't allocate net_device structure, aborting.\n");
aaec0fab
JO		 2457 goto out_release_regions;
2458 }
2459 card->pdev = pdev;
2460
2461 /* fetch base address and length of first resource */
2462 mmio_start = pci_resource_start(pdev, 0);
2463 mmio_len = pci_resource_len(pdev, 0);
2464
2465 card->netdev->mem_start = mmio_start;
2466 card->netdev->mem_end = mmio_start + mmio_len;
2467 card->regs = ioremap(mmio_start, mmio_len);
2468
2469 if (!card->regs) {
e6311d85
LV		 2470 dev_err(&pdev->dev,
2471 "Couldn't obtain PCI resources, aborting.\n");
aaec0fab
JO		 2472 goto out_release_regions;
2473 }
2474
2475 return card;
2476
2477out_release_regions:
2478 pci_release_regions(pdev);
2479out_disable_dev:
2480 pci_disable_device(pdev);
2481 pci_set_drvdata(pdev, NULL);
2482 return NULL;
2483}
2484
2485/**
2486 * spider_net_probe - initialization of a device
2487 * @pdev: PCI device
2488 * @ent: entry in the device id list
2489 *
2490 * Returns 0 on success, <0 on failure
2491 *
2492 * spider_net_probe initializes pdev and registers a net_device
2493 * structure for it. After that, the device can be ifconfig'ed up
2494 **/
2495static int __devinit
2496spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2497{
2498 int err = -EIO;
2499 struct spider_net_card *card;
2500
2501 card = spider_net_setup_pci_dev(pdev);
2502 if (!card)
2503 goto out;
2504
2505 spider_net_workaround_rxramfull(card);
2506 spider_net_init_card(card);
2507
2508 err = spider_net_setup_phy(card);
2509 if (err)
2510 goto out_undo_pci;
2511
aaec0fab
JO		 2512 err = spider_net_setup_netdev(card);
2513 if (err)
2514 goto out_undo_pci;
2515
2516 return 0;
2517
2518out_undo_pci:
2519 spider_net_undo_pci_setup(card);
2520 free_netdev(card->netdev);
2521out:
2522 return err;
2523}
2524
2525/**
2526 * spider_net_remove - removal of a device
2527 * @pdev: PCI device
2528 *
2529 * Returns 0 on success, <0 on failure
2530 *
2531 * spider_net_remove is called to remove the device and unregisters the
2532 * net_device
2533 **/
2534static void __devexit
2535spider_net_remove(struct pci_dev *pdev)
2536{
2537 struct net_device *netdev;
2538 struct spider_net_card *card;
2539
2540 netdev = pci_get_drvdata(pdev);
2541 card = netdev_priv(netdev);
2542
2543 wait_event(card->waitq,
2544 atomic_read(&card->tx_timeout_task_counter) == 0);
2545
2546 unregister_netdev(netdev);
543cec51
JO		 2547
2548 /* switch off card */
2549 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2550 SPIDER_NET_CKRCTRL_STOP_VALUE);
2551 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2552 SPIDER_NET_CKRCTRL_RUN_VALUE);
2553
aaec0fab
JO		 2554 spider_net_undo_pci_setup(card);
2555 free_netdev(netdev);
aaec0fab
JO		 2556}
2557
2558static struct pci_driver spider_net_driver = {
aaec0fab
JO		 2559 .name = spider_net_driver_name,
2560 .id_table = spider_net_pci_tbl,
2561 .probe = spider_net_probe,
2562 .remove = __devexit_p(spider_net_remove)
2563};
2564
2565/**
2566 * spider_net_init - init function when the driver is loaded
2567 *
2568 * spider_net_init registers the device driver
2569 */
2570static int __init spider_net_init(void)
2571{
90f10841
LV		 2572 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2573
aaec0fab
JO		 2574 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2575 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2576 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2577 }
2578 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2579 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2580 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2581 }
2582 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2583 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2584 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2585 }
2586 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2587 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2588 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2589 }
2590
2591 return pci_register_driver(&spider_net_driver);
2592}
2593
2594/**
2595 * spider_net_cleanup - exit function when driver is unloaded
2596 *
2597 * spider_net_cleanup unregisters the device driver
2598 */
2599static void __exit spider_net_cleanup(void)
2600{
2601 pci_unregister_driver(&spider_net_driver);
2602}
2603
2604module_init(spider_net_init);
2605module_exit(spider_net_cleanup);
Clone of davem's net-next-2.6 tree