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spidernet: null out skb pointer after its been used.
[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
JO		 33#include <linux/init.h>
34#include <linux/ioport.h>
35#include <linux/ip.h>
36#include <linux/kernel.h>
37#include <linux/mii.h>
38#include <linux/module.h>
39#include <linux/netdevice.h>
40#include <linux/device.h>
41#include <linux/pci.h>
42#include <linux/skbuff.h>
43#include <linux/slab.h>
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>
49#include <asm/bitops.h>
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);
aaec0fab
JO		 60
61static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
62static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
63
e2874f2e
LV		 64module_param(rx_descriptors, int, 0444);
65module_param(tx_descriptors, int, 0444);
aaec0fab
JO		 66
67MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
68 "in rx chains");
69MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
70 "in tx chain");
71
72char spider_net_driver_name[] = "spidernet";
73
74static struct pci_device_id spider_net_pci_tbl[] = {
75 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
76 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
77 { 0, }
78};
79
80MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
81
82/**
83 * spider_net_read_reg - reads an SMMIO register of a card
84 * @card: device structure
85 * @reg: register to read from
86 *
87 * returns the content of the specified SMMIO register.
88 */
bdd01503 89static inline u32
aaec0fab
JO		 90spider_net_read_reg(struct spider_net_card *card, u32 reg)
91{
3bc0f40c
BH		 92 /* We use the powerpc specific variants instead of readl_be() because
93 * we know spidernet is not a real PCI device and we can thus avoid the
94 * performance hit caused by the PCI workarounds.
95 */
96 return in_be32(card->regs + reg);
aaec0fab
JO		 97}
98
99/**
100 * spider_net_write_reg - writes to an SMMIO register of a card
101 * @card: device structure
102 * @reg: register to write to
103 * @value: value to write into the specified SMMIO register
104 */
bdd01503 105static inline void
aaec0fab
JO		 106spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
107{
3bc0f40c
BH		 108 /* We use the powerpc specific variants instead of writel_be() because
109 * we know spidernet is not a real PCI device and we can thus avoid the
110 * performance hit caused by the PCI workarounds.
111 */
112 out_be32(card->regs + reg, value);
aaec0fab
JO		 113}
114
aaec0fab
JO		 115/** spider_net_write_phy - write to phy register
116 * @netdev: adapter to be written to
117 * @mii_id: id of MII
118 * @reg: PHY register
119 * @val: value to be written to phy register
120 *
121 * spider_net_write_phy_register writes to an arbitrary PHY
122 * register via the spider GPCWOPCMD register. We assume the queue does
123 * not run full (not more than 15 commands outstanding).
124 **/
125static void
126spider_net_write_phy(struct net_device *netdev, int mii_id,
127 int reg, int val)
128{
129 struct spider_net_card *card = netdev_priv(netdev);
130 u32 writevalue;
131
132 writevalue = ((u32)mii_id << 21) |
133 ((u32)reg << 16) | ((u32)val);
134
135 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
136}
137
138/** spider_net_read_phy - read from phy register
139 * @netdev: network device to be read from
140 * @mii_id: id of MII
141 * @reg: PHY register
142 *
143 * Returns value read from PHY register
144 *
145 * spider_net_write_phy reads from an arbitrary PHY
146 * register via the spider GPCROPCMD register
147 **/
148static int
149spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
150{
151 struct spider_net_card *card = netdev_priv(netdev);
152 u32 readvalue;
153
154 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
155 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
156
157 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
158 * interrupt, as we poll for the completion of the read operation
159 * in spider_net_read_phy. Should take about 50 us */
160 do {
161 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
162 } while (readvalue & SPIDER_NET_GPREXEC);
163
164 readvalue &= SPIDER_NET_GPRDAT_MASK;
165
166 return readvalue;
167}
168
abdb66b5
KI		 169/**
170 * spider_net_setup_aneg - initial auto-negotiation setup
171 * @card: device structure
172 **/
173static void
174spider_net_setup_aneg(struct spider_net_card *card)
175{
176 struct mii_phy *phy = &card->phy;
177 u32 advertise = 0;
a1c38a4a 178 u16 bmsr, estat;
abdb66b5 179
a1c38a4a
IK		 180 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
181 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
abdb66b5
KI		 182
183 if (bmsr & BMSR_10HALF)
184 advertise |= ADVERTISED_10baseT_Half;
185 if (bmsr & BMSR_10FULL)
186 advertise |= ADVERTISED_10baseT_Full;
187 if (bmsr & BMSR_100HALF)
188 advertise |= ADVERTISED_100baseT_Half;
189 if (bmsr & BMSR_100FULL)
190 advertise |= ADVERTISED_100baseT_Full;
191
192 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
193 advertise |= SUPPORTED_1000baseT_Full;
194 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
195 advertise |= SUPPORTED_1000baseT_Half;
196
197 mii_phy_probe(phy, phy->mii_id);
198 phy->def->ops->setup_aneg(phy, advertise);
199
200}
201
aaec0fab 202/**
11f1a52b 203 * spider_net_rx_irq_off - switch off rx irq on this spider card
aaec0fab
JO		 204 * @card: device structure
205 *
11f1a52b 206 * switches off rx irq by masking them out in the GHIINTnMSK register
aaec0fab
JO		 207 */
208static void
11f1a52b 209spider_net_rx_irq_off(struct spider_net_card *card)
aaec0fab
JO		 210{
211 u32 regvalue;
aaec0fab 212
11f1a52b
AB		 213 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
214 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
aaec0fab
JO		 215}
216
217/**
11f1a52b 218 * spider_net_rx_irq_on - switch on rx irq on this spider card
aaec0fab
JO		 219 * @card: device structure
220 *
11f1a52b 221 * switches on rx irq by enabling them in the GHIINTnMSK register
aaec0fab
JO		 222 */
223static void
11f1a52b 224spider_net_rx_irq_on(struct spider_net_card *card)
aaec0fab
JO		 225{
226 u32 regvalue;
aaec0fab 227
11f1a52b
AB		 228 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
229 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
aaec0fab
JO		 230}
231
232/**
233 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
234 * @card: card structure
235 *
236 * spider_net_set_promisc sets the unicast destination address filter and
237 * thus either allows for non-promisc mode or promisc mode
238 */
239static void
240spider_net_set_promisc(struct spider_net_card *card)
241{
242 u32 macu, macl;
243 struct net_device *netdev = card->netdev;
244
245 if (netdev->flags & IFF_PROMISC) {
246 /* clear destination entry 0 */
247 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
248 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
249 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
250 SPIDER_NET_PROMISC_VALUE);
251 } else {
252 macu = netdev->dev_addr[0];
253 macu <<= 8;
254 macu |= netdev->dev_addr[1];
255 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
256
257 macu |= SPIDER_NET_UA_DESCR_VALUE;
258 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
259 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
260 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
261 SPIDER_NET_NONPROMISC_VALUE);
262 }
263}
264
265/**
266 * spider_net_get_mac_address - read mac address from spider card
267 * @card: device structure
268 *
269 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
270 */
271static int
272spider_net_get_mac_address(struct net_device *netdev)
273{
274 struct spider_net_card *card = netdev_priv(netdev);
275 u32 macl, macu;
276
277 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
278 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
279
280 netdev->dev_addr[0] = (macu >> 24) & 0xff;
281 netdev->dev_addr[1] = (macu >> 16) & 0xff;
282 netdev->dev_addr[2] = (macu >> 8) & 0xff;
283 netdev->dev_addr[3] = macu & 0xff;
284 netdev->dev_addr[4] = (macl >> 8) & 0xff;
285 netdev->dev_addr[5] = macl & 0xff;
286
287 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
288 return -EINVAL;
289
290 return 0;
291}
292
293/**
294 * spider_net_get_descr_status -- returns the status of a descriptor
295 * @descr: descriptor to look at
296 *
297 * returns the status as in the dmac_cmd_status field of the descriptor
298 */
bdd01503 299static inline int
4cb6f9e5 300spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
aaec0fab 301{
4cb6f9e5 302 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
aaec0fab
JO		 303}
304
305/**
306 * spider_net_free_chain - free descriptor chain
307 * @card: card structure
308 * @chain: address of chain
309 *
310 */
311static void
312spider_net_free_chain(struct spider_net_card *card,
313 struct spider_net_descr_chain *chain)
314{
315 struct spider_net_descr *descr;
316
d4ed8f8d
LV		 317 descr = chain->ring;
318 do {
aaec0fab 319 descr->bus_addr = 0;
4cb6f9e5 320 descr->hwdescr->next_descr_addr = 0;
d4ed8f8d
LV		 321 descr = descr->next;
322 } while (descr != chain->ring);
323
324 dma_free_coherent(&card->pdev->dev, chain->num_desc,
4cb6f9e5 325 chain->hwring, chain->dma_addr);
aaec0fab
JO		 326}
327
328/**
d4ed8f8d 329 * spider_net_init_chain - alloc and link descriptor chain
aaec0fab
JO		 330 * @card: card structure
331 * @chain: address of chain
aaec0fab 332 *
d4ed8f8d 333 * We manage a circular list that mirrors the hardware structure,
aaec0fab
JO		 334 * except that the hardware uses bus addresses.
335 *
d4ed8f8d 336 * Returns 0 on success, <0 on failure
aaec0fab
JO		 337 */
338static int
339spider_net_init_chain(struct spider_net_card *card,
d4ed8f8d 340 struct spider_net_descr_chain *chain)
aaec0fab
JO		 341{
342 int i;
343 struct spider_net_descr *descr;
4cb6f9e5 344 struct spider_net_hw_descr *hwdescr;
11f1a52b 345 dma_addr_t buf;
d4ed8f8d 346 size_t alloc_size;
aaec0fab 347
4cb6f9e5 348 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
aaec0fab 349
4cb6f9e5 350 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
d4ed8f8d 351 &chain->dma_addr, GFP_KERNEL);
aaec0fab 352
4cb6f9e5 353 if (!chain->hwring)
d4ed8f8d 354 return -ENOMEM;
aaec0fab 355
4cb6f9e5 356 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
d4ed8f8d
LV		 357
358 /* Set up the hardware pointers in each descriptor */
4cb6f9e5
LV		 359 descr = chain->ring;
360 hwdescr = chain->hwring;
d4ed8f8d 361 buf = chain->dma_addr;
4cb6f9e5
LV		 362 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
363 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
364 hwdescr->next_descr_addr = 0;
aaec0fab 365
4cb6f9e5 366 descr->hwdescr = hwdescr;
11f1a52b 367 descr->bus_addr = buf;
aaec0fab
JO		 368 descr->next = descr + 1;
369 descr->prev = descr - 1;
370
4cb6f9e5 371 buf += sizeof(struct spider_net_hw_descr);
aaec0fab
JO		 372 }
373 /* do actual circular list */
d4ed8f8d
LV		 374 (descr-1)->next = chain->ring;
375 chain->ring->prev = descr-1;
aaec0fab 376
bdd01503 377 spin_lock_init(&chain->lock);
d4ed8f8d
LV		 378 chain->head = chain->ring;
379 chain->tail = chain->ring;
aaec0fab 380 return 0;
aaec0fab
JO		 381}
382
383/**
384 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
385 * @card: card structure
386 *
387 * returns 0 on success, <0 on failure
388 */
389static void
390spider_net_free_rx_chain_contents(struct spider_net_card *card)
391{
392 struct spider_net_descr *descr;
393
394 descr = card->rx_chain.head;
64751910 395 do {
aaec0fab 396 if (descr->skb) {
4cb6f9e5 397 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
11f1a52b 398 SPIDER_NET_MAX_FRAME,
348bc2a6 399 PCI_DMA_BIDIRECTIONAL);
d9c199ee
LV		 400 dev_kfree_skb(descr->skb);
401 descr->skb = NULL;
aaec0fab
JO		 402 }
403 descr = descr->next;
64751910 404 } while (descr != card->rx_chain.head);
aaec0fab
JO		 405}
406
407/**
a4182c50 408 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
aaec0fab
JO		 409 * @card: card structure
410 * @descr: descriptor to re-init
411 *
a4182c50 412 * Return 0 on succes, <0 on failure.
aaec0fab 413 *
a4182c50
LV		 414 * Allocates a new rx skb, iommu-maps it and attaches it to the
415 * descriptor. Mark the descriptor as activated, ready-to-use.
aaec0fab
JO		 416 */
417static int
418spider_net_prepare_rx_descr(struct spider_net_card *card,
419 struct spider_net_descr *descr)
420{
4cb6f9e5 421 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
8e0a613b 422 dma_addr_t buf;
aaec0fab
JO		 423 int offset;
424 int bufsize;
425
426 /* we need to round up the buffer size to a multiple of 128 */
11f1a52b 427 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
aaec0fab
JO		 428 (~(SPIDER_NET_RXBUF_ALIGN - 1));
429
430 /* and we need to have it 128 byte aligned, therefore we allocate a
431 * bit more */
432 /* allocate an skb */
98739407
CH		 433 descr->skb = netdev_alloc_skb(card->netdev,
434 bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
aaec0fab 435 if (!descr->skb) {
11f1a52b
AB		 436 if (netif_msg_rx_err(card) && net_ratelimit())
437 pr_err("Not enough memory to allocate rx buffer\n");
9b6b0b81 438 card->spider_stats.alloc_rx_skb_error++;
aaec0fab
JO		 439 return -ENOMEM;
440 }
4cb6f9e5
LV		 441 hwdescr->buf_size = bufsize;
442 hwdescr->result_size = 0;
443 hwdescr->valid_size = 0;
444 hwdescr->data_status = 0;
445 hwdescr->data_error = 0;
aaec0fab
JO		 446
447 offset = ((unsigned long)descr->skb->data) &
448 (SPIDER_NET_RXBUF_ALIGN - 1);
449 if (offset)
450 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
a4182c50 451 /* iommu-map the skb */
8e0a613b 452 buf = pci_map_single(card->pdev, descr->skb->data,
bdd01503 453 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
d4b0a4c1 454 if (pci_dma_mapping_error(buf)) {
aaec0fab 455 dev_kfree_skb_any(descr->skb);
d9c199ee 456 descr->skb = NULL;
11f1a52b 457 if (netif_msg_rx_err(card) && net_ratelimit())
aaec0fab 458 pr_err("Could not iommu-map rx buffer\n");
9b6b0b81 459 card->spider_stats.rx_iommu_map_error++;
4cb6f9e5 460 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
aaec0fab 461 } else {
4cb6f9e5
LV		 462 hwdescr->buf_addr = buf;
463 hwdescr->next_descr_addr = 0;
90476a20 464 wmb();
4cb6f9e5 465 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
bdd01503 466 SPIDER_NET_DMAC_NOINTR_COMPLETE;
d9a9720e
LV		 467
468 wmb();
4cb6f9e5 469 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
aaec0fab
JO		 470 }
471
a4182c50 472 return 0;
aaec0fab
JO		 473}
474
475/**
11f1a52b 476 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
aaec0fab
JO		 477 * @card: card structure
478 *
11f1a52b 479 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
aaec0fab
JO		 480 * chip by writing to the appropriate register. DMA is enabled in
481 * spider_net_enable_rxdmac.
482 */
bdd01503 483static inline void
aaec0fab
JO		 484spider_net_enable_rxchtails(struct spider_net_card *card)
485{
486 /* assume chain is aligned correctly */
487 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
488 card->rx_chain.tail->bus_addr);
489}
490
491/**
492 * spider_net_enable_rxdmac - enables a receive DMA controller
493 * @card: card structure
494 *
495 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
496 * in the GDADMACCNTR register
497 */
bdd01503 498static inline void
aaec0fab
JO		 499spider_net_enable_rxdmac(struct spider_net_card *card)
500{
11f1a52b 501 wmb();
aaec0fab
JO		 502 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
503 SPIDER_NET_DMA_RX_VALUE);
504}
505
506/**
507 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
508 * @card: card structure
509 *
11f1a52b 510 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
aaec0fab
JO		 511 */
512static void
513spider_net_refill_rx_chain(struct spider_net_card *card)
514{
bdd01503
JO		 515 struct spider_net_descr_chain *chain = &card->rx_chain;
516 unsigned long flags;
aaec0fab 517
11f1a52b
AB		 518 /* one context doing the refill (and a second context seeing that
519 * and omitting it) is ok. If called by NAPI, we'll be called again
520 * as spider_net_decode_one_descr is called several times. If some
521 * interrupt calls us, the NAPI is about to clean up anyway. */
bdd01503
JO		 522 if (!spin_trylock_irqsave(&chain->lock, flags))
523 return;
524
4cb6f9e5 525 while (spider_net_get_descr_status(chain->head->hwdescr) ==
bdd01503
JO		 526 SPIDER_NET_DESCR_NOT_IN_USE) {
527 if (spider_net_prepare_rx_descr(card, chain->head))
528 break;
529 chain->head = chain->head->next;
530 }
aaec0fab 531
bdd01503 532 spin_unlock_irqrestore(&chain->lock, flags);
aaec0fab
JO		 533}
534
535/**
2c307db7 536 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
aaec0fab
JO		 537 * @card: card structure
538 *
2c307db7 539 * Returns 0 on success, <0 on failure.
aaec0fab
JO		 540 */
541static int
542spider_net_alloc_rx_skbs(struct spider_net_card *card)
543{
544 int result;
545 struct spider_net_descr_chain *chain;
546
547 result = -ENOMEM;
548
549 chain = &card->rx_chain;
2c307db7
LV		 550 /* Put at least one buffer into the chain. if this fails,
551 * we've got a problem. If not, spider_net_refill_rx_chain
552 * will do the rest at the end of this function. */
aaec0fab
JO		 553 if (spider_net_prepare_rx_descr(card, chain->head))
554 goto error;
555 else
556 chain->head = chain->head->next;
557
2c307db7
LV		 558 /* This will allocate the rest of the rx buffers;
559 * if not, it's business as usual later on. */
aaec0fab 560 spider_net_refill_rx_chain(card);
11f1a52b 561 spider_net_enable_rxdmac(card);
aaec0fab
JO		 562 return 0;
563
564error:
565 spider_net_free_rx_chain_contents(card);
566 return result;
567}
568
aaec0fab
JO		 569/**
570 * spider_net_get_multicast_hash - generates hash for multicast filter table
571 * @addr: multicast address
572 *
573 * returns the hash value.
574 *
575 * spider_net_get_multicast_hash calculates a hash value for a given multicast
576 * address, that is used to set the multicast filter tables
577 */
578static u8
579spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
580{
aaec0fab
JO		 581 u32 crc;
582 u8 hash;
11f1a52b
AB		 583 char addr_for_crc[ETH_ALEN] = { 0, };
584 int i, bit;
585
586 for (i = 0; i < ETH_ALEN * 8; i++) {
587 bit = (addr[i / 8] >> (i % 8)) & 1;
588 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
589 }
aaec0fab 590
11f1a52b 591 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
aaec0fab
JO		 592
593 hash = (crc >> 27);
594 hash <<= 3;
595 hash |= crc & 7;
11f1a52b 596 hash &= 0xff;
aaec0fab
JO		 597
598 return hash;
599}
600
601/**
602 * spider_net_set_multi - sets multicast addresses and promisc flags
603 * @netdev: interface device structure
604 *
605 * spider_net_set_multi configures multicast addresses as needed for the
606 * netdev interface. It also sets up multicast, allmulti and promisc
607 * flags appropriately
608 */
609static void
610spider_net_set_multi(struct net_device *netdev)
611{
612 struct dev_mc_list *mc;
613 u8 hash;
614 int i;
615 u32 reg;
616 struct spider_net_card *card = netdev_priv(netdev);
617 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
618 {0, };
619
620 spider_net_set_promisc(card);
621
622 if (netdev->flags & IFF_ALLMULTI) {
623 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
624 set_bit(i, bitmask);
625 }
626 goto write_hash;
627 }
628
629 /* well, we know, what the broadcast hash value is: it's xfd
630 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
631 set_bit(0xfd, bitmask);
632
633 for (mc = netdev->mc_list; mc; mc = mc->next) {
634 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
635 set_bit(hash, bitmask);
636 }
637
638write_hash:
639 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
640 reg = 0;
641 if (test_bit(i * 4, bitmask))
642 reg += 0x08;
643 reg <<= 8;
644 if (test_bit(i * 4 + 1, bitmask))
645 reg += 0x08;
646 reg <<= 8;
647 if (test_bit(i * 4 + 2, bitmask))
648 reg += 0x08;
649 reg <<= 8;
650 if (test_bit(i * 4 + 3, bitmask))
651 reg += 0x08;
652
653 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
654 }
655}
656
657/**
658 * spider_net_disable_rxdmac - disables the receive DMA controller
659 * @card: card structure
660 *
661 * spider_net_disable_rxdmac terminates processing on the DMA controller by
662 * turing off DMA and issueing a force end
663 */
664static void
665spider_net_disable_rxdmac(struct spider_net_card *card)
666{
667 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
668 SPIDER_NET_DMA_RX_FEND_VALUE);
669}
670
aaec0fab
JO		 671/**
672 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
673 * @card: card structure
674 * @descr: descriptor structure to fill out
675 * @skb: packet to use
676 *
677 * returns 0 on success, <0 on failure.
678 *
679 * fills out the descriptor structure with skb data and len. Copies data,
680 * if needed (32bit DMA!)
681 */
682static int
683spider_net_prepare_tx_descr(struct spider_net_card *card,
aaec0fab
JO		 684 struct sk_buff *skb)
685{
d9c199ee 686 struct spider_net_descr_chain *chain = &card->tx_chain;
9cc7bf7e 687 struct spider_net_descr *descr;
4cb6f9e5 688 struct spider_net_hw_descr *hwdescr;
11f1a52b 689 dma_addr_t buf;
9cc7bf7e 690 unsigned long flags;
11f1a52b 691
9c434f5e 692 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
d4b0a4c1 693 if (pci_dma_mapping_error(buf)) {
11f1a52b 694 if (netif_msg_tx_err(card) && net_ratelimit())
aaec0fab 695 pr_err("could not iommu-map packet (%p, %i). "
9c434f5e 696 "Dropping packet\n", skb->data, skb->len);
9b6b0b81 697 card->spider_stats.tx_iommu_map_error++;
aaec0fab
JO		 698 return -ENOMEM;
699 }
700
d9c199ee 701 spin_lock_irqsave(&chain->lock, flags);
9cc7bf7e 702 descr = card->tx_chain.head;
d9c199ee
LV		 703 if (descr->next == chain->tail->prev) {
704 spin_unlock_irqrestore(&chain->lock, flags);
705 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
706 return -ENOMEM;
707 }
4cb6f9e5 708 hwdescr = descr->hwdescr;
d9c199ee 709 chain->head = descr->next;
9cc7bf7e 710
aaec0fab 711 descr->skb = skb;
4cb6f9e5
LV		 712 hwdescr->buf_addr = buf;
713 hwdescr->buf_size = skb->len;
714 hwdescr->next_descr_addr = 0;
715 hwdescr->data_status = 0;
aaec0fab 716
4cb6f9e5 717 hwdescr->dmac_cmd_status =
bdd01503 718 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
d9c199ee 719 spin_unlock_irqrestore(&chain->lock, flags);
9cc7bf7e 720
33bdeec8 721 if (skb->protocol == htons(ETH_P_IP) && skb->ip_summed == CHECKSUM_PARTIAL)
eddc9ec5 722 switch (ip_hdr(skb)->protocol) {
bdd01503 723 case IPPROTO_TCP:
4cb6f9e5 724 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
bdd01503
JO		 725 break;
726 case IPPROTO_UDP:
4cb6f9e5 727 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
bdd01503
JO		 728 break;
729 }
730
204e5fa1 731 /* Chain the bus address, so that the DMA engine finds this descr. */
4cb6f9e5
LV		 732 wmb();
733 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
bdd01503 734
917a5b8e 735 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
bdd01503
JO		 736 return 0;
737}
738
a664ccf4 739static int
204e5fa1
LV		 740spider_net_set_low_watermark(struct spider_net_card *card)
741{
4cb6f9e5
LV		 742 struct spider_net_descr *descr = card->tx_chain.tail;
743 struct spider_net_hw_descr *hwdescr;
9cc7bf7e 744 unsigned long flags;
204e5fa1
LV		 745 int status;
746 int cnt=0;
747 int i;
204e5fa1 748
9cc7bf7e
LV		 749 /* Measure the length of the queue. Measurement does not
750 * need to be precise -- does not need a lock. */
204e5fa1 751 while (descr != card->tx_chain.head) {
4cb6f9e5 752 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
204e5fa1
LV		 753 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
754 break;
755 descr = descr->next;
756 cnt++;
757 }
758
759 /* If TX queue is short, don't even bother with interrupts */
d4ed8f8d 760 if (cnt < card->tx_chain.num_desc/4)
a664ccf4 761 return cnt;
204e5fa1
LV		 762
763 /* Set low-watermark 3/4th's of the way into the queue. */
764 descr = card->tx_chain.tail;
765 cnt = (cnt*3)/4;
766 for (i=0;i<cnt; i++)
767 descr = descr->next;
768
769 /* Set the new watermark, clear the old watermark */
9cc7bf7e 770 spin_lock_irqsave(&card->tx_chain.lock, flags);
4cb6f9e5
LV		 771 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
772 if (card->low_watermark && card->low_watermark != descr) {
773 hwdescr = card->low_watermark->hwdescr;
774 hwdescr->dmac_cmd_status =
775 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
776 }
204e5fa1 777 card->low_watermark = descr;
9cc7bf7e 778 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
a664ccf4 779 return cnt;
204e5fa1
LV		 780}
781
bdd01503
JO		 782/**
783 * spider_net_release_tx_chain - processes sent tx descriptors
784 * @card: adapter structure
785 * @brutal: if set, don't care about whether descriptor seems to be in use
786 *
787 * returns 0 if the tx ring is empty, otherwise 1.
788 *
789 * spider_net_release_tx_chain releases the tx descriptors that spider has
790 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
791 * If some other context is calling this function, we return 1 so that we're
792 * scheduled again (if we were scheduled) and will not loose initiative.
793 */
794static int
795spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
796{
797 struct spider_net_descr_chain *chain = &card->tx_chain;
9cc7bf7e 798 struct spider_net_descr *descr;
4cb6f9e5 799 struct spider_net_hw_descr *hwdescr;
9cc7bf7e
LV		 800 struct sk_buff *skb;
801 u32 buf_addr;
802 unsigned long flags;
bdd01503
JO		 803 int status;
804
5c8e98fe 805 while (1) {
9cc7bf7e 806 spin_lock_irqsave(&chain->lock, flags);
5c8e98fe
LV		 807 if (chain->tail == chain->head) {
808 spin_unlock_irqrestore(&chain->lock, flags);
809 return 0;
810 }
9cc7bf7e 811 descr = chain->tail;
4cb6f9e5 812 hwdescr = descr->hwdescr;
9cc7bf7e 813
4cb6f9e5 814 status = spider_net_get_descr_status(hwdescr);
bdd01503
JO		 815 switch (status) {
816 case SPIDER_NET_DESCR_COMPLETE:
817 card->netdev_stats.tx_packets++;
9cc7bf7e 818 card->netdev_stats.tx_bytes += descr->skb->len;
bdd01503
JO		 819 break;
820
821 case SPIDER_NET_DESCR_CARDOWNED:
9cc7bf7e
LV		 822 if (!brutal) {
823 spin_unlock_irqrestore(&chain->lock, flags);
bdd01503 824 return 1;
9cc7bf7e
LV		 825 }
826
bdd01503
JO		 827 /* fallthrough, if we release the descriptors
828 * brutally (then we don't care about
829 * SPIDER_NET_DESCR_CARDOWNED) */
830
831 case SPIDER_NET_DESCR_RESPONSE_ERROR:
832 case SPIDER_NET_DESCR_PROTECTION_ERROR:
833 case SPIDER_NET_DESCR_FORCE_END:
834 if (netif_msg_tx_err(card))
835 pr_err("%s: forcing end of tx descriptor "
836 "with status x%02x\n",
837 card->netdev->name, status);
838 card->netdev_stats.tx_errors++;
839 break;
840
841 default:
842 card->netdev_stats.tx_dropped++;
9cc7bf7e
LV		 843 if (!brutal) {
844 spin_unlock_irqrestore(&chain->lock, flags);
c3fee4c5 845 return 1;
9cc7bf7e 846 }
bdd01503 847 }
aaec0fab 848
9cc7bf7e 849 chain->tail = descr->next;
4cb6f9e5 850 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
9cc7bf7e 851 skb = descr->skb;
d9c199ee 852 descr->skb = NULL;
4cb6f9e5 853 buf_addr = hwdescr->buf_addr;
9cc7bf7e
LV		 854 spin_unlock_irqrestore(&chain->lock, flags);
855
856 /* unmap the skb */
857 if (skb) {
9c434f5e
JL		 858 pci_unmap_single(card->pdev, buf_addr, skb->len,
859 PCI_DMA_TODEVICE);
9cc7bf7e
LV		 860 dev_kfree_skb(skb);
861 }
862 }
aaec0fab
JO		 863 return 0;
864}
865
866/**
867 * spider_net_kick_tx_dma - enables TX DMA processing
868 * @card: card structure
869 * @descr: descriptor address to enable TX processing at
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) {
9b6b0b81 922 card->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{
4cb6f9e5 982 struct spider_net_hw_descr *hwdescr= descr->hwdescr;
aaec0fab
JO		 983 struct sk_buff *skb;
984 struct net_device *netdev;
985 u32 data_status, data_error;
986
4cb6f9e5
LV		 987 data_status = hwdescr->data_status;
988 data_error = hwdescr->data_error;
aaec0fab
JO		 989 netdev = card->netdev;
990
11f1a52b 991 skb = descr->skb;
4cb6f9e5 992 skb_put(skb, hwdescr->valid_size);
aaec0fab
JO		 993
994 /* the card seems to add 2 bytes of junk in front
995 * of the ethernet frame */
996#define SPIDER_MISALIGN 2
997 skb_pull(skb, SPIDER_MISALIGN);
998 skb->protocol = eth_type_trans(skb, netdev);
999
1000 /* checksum offload */
1001 if (card->options.rx_csum) {
11f1a52b
AB		 1002 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
1003 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
1004 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
aaec0fab
JO		 1005 skb->ip_summed = CHECKSUM_UNNECESSARY;
1006 else
1007 skb->ip_summed = CHECKSUM_NONE;
11f1a52b 1008 } else
aaec0fab 1009 skb->ip_summed = CHECKSUM_NONE;
aaec0fab
JO		 1010
1011 if (data_status & SPIDER_NET_VLAN_PACKET) {
1012 /* further enhancements: HW-accel VLAN
1013 * vlan_hwaccel_receive_skb
1014 */
1015 }
1016
aaec0fab
JO		 1017 /* update netdevice statistics */
1018 card->netdev_stats.rx_packets++;
1019 card->netdev_stats.rx_bytes += skb->len;
93c1d3b7
FM		 1020
1021 /* pass skb up to stack */
1022 netif_receive_skb(skb);
aaec0fab
JO		 1023}
1024
6d24998f
LV		 1025#ifdef DEBUG
1026static void show_rx_chain(struct spider_net_card *card)
1027{
1028 struct spider_net_descr_chain *chain = &card->rx_chain;
1029 struct spider_net_descr *start= chain->tail;
1030 struct spider_net_descr *descr= start;
1031 int status;
1032
1033 int cnt = 0;
1034 int cstat = spider_net_get_descr_status(descr);
1035 printk(KERN_INFO "RX chain tail at descr=%ld\n",
1036 (start - card->descr) - card->tx_chain.num_desc);
1037 status = cstat;
1038 do
1039 {
1040 status = spider_net_get_descr_status(descr);
1041 if (cstat != status) {
1042 printk(KERN_INFO "Have %d descrs with stat=x%08x\n", cnt, cstat);
1043 cstat = status;
1044 cnt = 0;
1045 }
1046 cnt ++;
1047 descr = descr->next;
1048 } while (descr != start);
1049 printk(KERN_INFO "Last %d descrs with stat=x%08x\n", cnt, cstat);
1050}
1051#endif
1052
aaec0fab 1053/**
7376e732 1054 * spider_net_decode_one_descr - processes an RX descriptor
aaec0fab
JO		 1055 * @card: card structure
1056 *
7376e732 1057 * Returns 1 if a packet has been sent to the stack, otherwise 0.
aaec0fab 1058 *
7376e732
LV		 1059 * Processes an RX descriptor by iommu-unmapping the data buffer
1060 * and passing the packet up to the stack. This function is called
1061 * in softirq context, e.g. either bottom half from interrupt or
1062 * NAPI polling context.
aaec0fab
JO		 1063 */
1064static int
1cd173f6 1065spider_net_decode_one_descr(struct spider_net_card *card)
aaec0fab 1066{
bdd01503
JO		 1067 struct spider_net_descr_chain *chain = &card->rx_chain;
1068 struct spider_net_descr *descr = chain->tail;
4cb6f9e5 1069 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
bdd01503 1070 int status;
aaec0fab 1071
4cb6f9e5 1072 status = spider_net_get_descr_status(hwdescr);
aaec0fab 1073
80dab7c7
LV		 1074 /* Nothing in the descriptor, or ring must be empty */
1075 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1076 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1cd173f6 1077 return 0;
aaec0fab 1078
11f1a52b 1079 /* descriptor definitively used -- move on tail */
aaec0fab
JO		 1080 chain->tail = descr->next;
1081
05b346b5 1082 /* unmap descriptor */
4cb6f9e5 1083 pci_unmap_single(card->pdev, hwdescr->buf_addr,
05b346b5
LV		 1084 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1085
aaec0fab
JO		 1086 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1087 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1088 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1089 if (netif_msg_rx_err(card))
1090 pr_err("%s: dropping RX descriptor with state %d\n",
1091 card->netdev->name, status);
1092 card->netdev_stats.rx_dropped++;
7f7223b8 1093 goto bad_desc;
aaec0fab
JO		 1094 }
1095
1096 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1097 (status != SPIDER_NET_DESCR_FRAME_END) ) {
5a028877 1098 if (netif_msg_rx_err(card))
7376e732 1099 pr_err("%s: RX descriptor with unknown state %d\n",
aaec0fab 1100 card->netdev->name, status);
5a028877 1101 card->spider_stats.rx_desc_unk_state++;
7f7223b8 1102 goto bad_desc;
aaec0fab
JO		 1103 }
1104
366684bd 1105 /* The cases we'll throw away the packet immediately */
4cb6f9e5 1106 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
366684bd
LV		 1107 if (netif_msg_rx_err(card))
1108 pr_err("%s: error in received descriptor found, "
1109 "data_status=x%08x, data_error=x%08x\n",
1110 card->netdev->name,
4cb6f9e5 1111 hwdescr->data_status, hwdescr->data_error);
7f7223b8 1112 goto bad_desc;
366684bd
LV		 1113 }
1114
4cb6f9e5 1115 if (hwdescr->dmac_cmd_status & 0xfefe) {
6d24998f
LV		 1116 pr_err("%s: bad status, cmd_status=x%08x\n",
1117 card->netdev->name,
4cb6f9e5
LV		 1118 hwdescr->dmac_cmd_status);
1119 pr_err("buf_addr=x%08x\n", hwdescr->buf_addr);
1120 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1121 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1122 pr_err("result_size=x%08x\n", hwdescr->result_size);
1123 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1124 pr_err("data_status=x%08x\n", hwdescr->data_status);
1125 pr_err("data_error=x%08x\n", hwdescr->data_error);
6d24998f
LV		 1126 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1127
1128 card->spider_stats.rx_desc_error++;
1129 goto bad_desc;
1130 }
1131
7f7223b8
LV		 1132 /* Ok, we've got a packet in descr */
1133 spider_net_pass_skb_up(descr, card);
83d35145 1134 descr->skb = NULL;
4cb6f9e5 1135 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
7f7223b8
LV		 1136 return 1;
1137
1138bad_desc:
1139 dev_kfree_skb_irq(descr->skb);
d9c199ee 1140 descr->skb = NULL;
4cb6f9e5 1141 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
7f7223b8 1142 return 0;
aaec0fab
JO		 1143}
1144
1145/**
1146 * spider_net_poll - NAPI poll function called by the stack to return packets
1147 * @netdev: interface device structure
1148 * @budget: number of packets we can pass to the stack at most
1149 *
1150 * returns 0 if no more packets available to the driver/stack. Returns 1,
1151 * if the quota is exceeded, but the driver has still packets.
1152 *
1153 * spider_net_poll returns all packets from the rx descriptors to the stack
1154 * (using netif_receive_skb). If all/enough packets are up, the driver
1155 * reenables interrupts and returns 0. If not, 1 is returned.
1156 */
1157static int
1158spider_net_poll(struct net_device *netdev, int *budget)
1159{
1160 struct spider_net_card *card = netdev_priv(netdev);
1161 int packets_to_do, packets_done = 0;
1162 int no_more_packets = 0;
1163
68a8c609 1164 spider_net_cleanup_tx_ring(card);
aaec0fab
JO		 1165 packets_to_do = min(*budget, netdev->quota);
1166
1167 while (packets_to_do) {
1cd173f6 1168 if (spider_net_decode_one_descr(card)) {
aaec0fab
JO		 1169 packets_done++;
1170 packets_to_do--;
1171 } else {
1172 /* no more packets for the stack */
1173 no_more_packets = 1;
1174 break;
1175 }
1176 }
1177
1178 netdev->quota -= packets_done;
1179 *budget -= packets_done;
11f1a52b 1180 spider_net_refill_rx_chain(card);
80dab7c7 1181 spider_net_enable_rxdmac(card);
aaec0fab
JO		 1182
1183 /* if all packets are in the stack, enable interrupts and return 0 */
1184 /* if not, return 1 */
1185 if (no_more_packets) {
1186 netif_rx_complete(netdev);
1187 spider_net_rx_irq_on(card);
1188 return 0;
1189 }
1190
1191 return 1;
1192}
1193
aaec0fab
JO		 1194/**
1195 * spider_net_get_stats - get interface statistics
1196 * @netdev: interface device structure
1197 *
1198 * returns the interface statistics residing in the spider_net_card struct
1199 */
1200static struct net_device_stats *
1201spider_net_get_stats(struct net_device *netdev)
1202{
1203 struct spider_net_card *card = netdev_priv(netdev);
1204 struct net_device_stats *stats = &card->netdev_stats;
1205 return stats;
1206}
1207
1208/**
1209 * spider_net_change_mtu - changes the MTU of an interface
1210 * @netdev: interface device structure
1211 * @new_mtu: new MTU value
1212 *
1213 * returns 0 on success, <0 on failure
1214 */
1215static int
1216spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1217{
1218 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1219 * and mtu is outbound only anyway */
1220 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1221 (new_mtu > SPIDER_NET_MAX_MTU) )
1222 return -EINVAL;
1223 netdev->mtu = new_mtu;
1224 return 0;
1225}
1226
1227/**
1228 * spider_net_set_mac - sets the MAC of an interface
1229 * @netdev: interface device structure
1230 * @ptr: pointer to new MAC address
1231 *
1232 * Returns 0 on success, <0 on failure. Currently, we don't support this
1233 * and will always return EOPNOTSUPP.
1234 */
1235static int
1236spider_net_set_mac(struct net_device *netdev, void *p)
1237{
1238 struct spider_net_card *card = netdev_priv(netdev);
054034db 1239 u32 macl, macu, regvalue;
aaec0fab
JO		 1240 struct sockaddr *addr = p;
1241
aaec0fab
JO		 1242 if (!is_valid_ether_addr(addr->sa_data))
1243 return -EADDRNOTAVAIL;
1244
054034db
JO		 1245 /* switch off GMACTPE and GMACRPE */
1246 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1247 regvalue &= ~((1 << 5) | (1 << 6));
1248 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1249
1250 /* write mac */
aaec0fab
JO		 1251 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1252 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1253 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1254 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1255 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1256
054034db
JO		 1257 /* switch GMACTPE and GMACRPE back on */
1258 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1259 regvalue |= ((1 << 5) | (1 << 6));
1260 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1261
aaec0fab
JO		 1262 spider_net_set_promisc(card);
1263
1264 /* look up, whether we have been successful */
1265 if (spider_net_get_mac_address(netdev))
1266 return -EADDRNOTAVAIL;
1267 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1268 return -EADDRNOTAVAIL;
1269
1270 return 0;
1271}
1272
abdb66b5
KI		 1273/**
1274 * spider_net_link_reset
1275 * @netdev: net device structure
1276 *
1277 * This is called when the PHY_LINK signal is asserted. For the blade this is
1278 * not connected so we should never get here.
1279 *
1280 */
1281static void
1282spider_net_link_reset(struct net_device *netdev)
1283{
1284
1285 struct spider_net_card *card = netdev_priv(netdev);
1286
1287 del_timer_sync(&card->aneg_timer);
1288
1289 /* clear interrupt, block further interrupts */
1290 spider_net_write_reg(card, SPIDER_NET_GMACST,
1291 spider_net_read_reg(card, SPIDER_NET_GMACST));
1292 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1293
1294 /* reset phy and setup aneg */
1295 spider_net_setup_aneg(card);
1296 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1297
1298}
1299
aaec0fab
JO		 1300/**
1301 * spider_net_handle_error_irq - handles errors raised by an interrupt
1302 * @card: card structure
1303 * @status_reg: interrupt status register 0 (GHIINT0STS)
1304 *
1305 * spider_net_handle_error_irq treats or ignores all error conditions
1306 * found when an interrupt is presented
1307 */
1308static void
1309spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1310{
1311 u32 error_reg1, error_reg2;
1312 u32 i;
1313 int show_error = 1;
1314
1315 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1316 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1317
1318 /* check GHIINT0STS ************************************/
1319 if (status_reg)
1320 for (i = 0; i < 32; i++)
1321 if (status_reg & (1<<i))
1322 switch (i)
1323 {
1324 /* let error_reg1 and error_reg2 evaluation decide, what to do
1325 case SPIDER_NET_PHYINT:
1326 case SPIDER_NET_GMAC2INT:
1327 case SPIDER_NET_GMAC1INT:
aaec0fab
JO		 1328 case SPIDER_NET_GFIFOINT:
1329 case SPIDER_NET_DMACINT:
1330 case SPIDER_NET_GSYSINT:
1331 break; */
1332
98b9040c
LV		 1333 case SPIDER_NET_GIPSINT:
1334 show_error = 0;
1335 break;
1336
aaec0fab
JO		 1337 case SPIDER_NET_GPWOPCMPINT:
1338 /* PHY write operation completed */
1339 show_error = 0;
1340 break;
1341 case SPIDER_NET_GPROPCMPINT:
1342 /* PHY read operation completed */
1343 /* we don't use semaphores, as we poll for the completion
1344 * of the read operation in spider_net_read_phy. Should take
1345 * about 50 us */
1346 show_error = 0;
1347 break;
1348 case SPIDER_NET_GPWFFINT:
1349 /* PHY command queue full */
1350 if (netif_msg_intr(card))
1351 pr_err("PHY write queue full\n");
1352 show_error = 0;
1353 break;
1354
1355 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1356 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1357 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1358
1359 case SPIDER_NET_GDTDEN0INT:
1360 /* someone has set TX_DMA_EN to 0 */
1361 show_error = 0;
1362 break;
1363
1364 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1365 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1366 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1367 case SPIDER_NET_GDADEN0INT:
1368 /* someone has set RX_DMA_EN to 0 */
1369 show_error = 0;
1370 break;
1371
1372 /* RX interrupts */
1373 case SPIDER_NET_GDDFDCINT:
1374 case SPIDER_NET_GDCFDCINT:
1375 case SPIDER_NET_GDBFDCINT:
1376 case SPIDER_NET_GDAFDCINT:
1377 /* case SPIDER_NET_GDNMINT: not used. print a message */
1378 /* case SPIDER_NET_GCNMINT: not used. print a message */
1379 /* case SPIDER_NET_GBNMINT: not used. print a message */
1380 /* case SPIDER_NET_GANMINT: not used. print a message */
1381 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1382 show_error = 0;
1383 break;
1384
1385 /* TX interrupts */
1386 case SPIDER_NET_GDTFDCINT:
1387 show_error = 0;
1388 break;
1389 case SPIDER_NET_GTTEDINT:
1390 show_error = 0;
1391 break;
1392 case SPIDER_NET_GDTDCEINT:
1393 /* chain end. If a descriptor should be sent, kick off
1394 * tx dma
98b9040c 1395 if (card->tx_chain.tail != card->tx_chain.head)
aaec0fab 1396 spider_net_kick_tx_dma(card);
98b9040c
LV		 1397 */
1398 show_error = 0;
aaec0fab
JO		 1399 break;
1400
1401 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1402 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1403 }
1404
1405 /* check GHIINT1STS ************************************/
1406 if (error_reg1)
1407 for (i = 0; i < 32; i++)
1408 if (error_reg1 & (1<<i))
1409 switch (i)
1410 {
1411 case SPIDER_NET_GTMFLLINT:
fc8e13da
IK		 1412 /* TX RAM full may happen on a usual case.
1413 * Logging is not needed. */
aaec0fab
JO		 1414 show_error = 0;
1415 break;
11f1a52b
AB		 1416 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1417 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1418 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1419 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
aaec0fab 1420 case SPIDER_NET_GRMFLLINT:
11f1a52b 1421 if (netif_msg_intr(card) && net_ratelimit())
5a028877 1422 pr_err("Spider RX RAM full, incoming packets "
11f1a52b
AB		 1423 "might be discarded!\n");
1424 spider_net_rx_irq_off(card);
75856175 1425 netif_rx_schedule(card->netdev);
11f1a52b 1426 show_error = 0;
aaec0fab
JO		 1427 break;
1428
1429 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1430 case SPIDER_NET_GDTINVDINT:
1431 /* allrighty. tx from previous descr ok */
1432 show_error = 0;
1433 break;
aaec0fab
JO		 1434
1435 /* chain end */
1436 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1437 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1438 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1439 case SPIDER_NET_GDADCEINT:
5a028877 1440 if (netif_msg_intr(card) && net_ratelimit())
aaec0fab
JO		 1441 pr_err("got descriptor chain end interrupt, "
1442 "restarting DMAC %c.\n",
37aad750 1443 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
aaec0fab 1444 spider_net_refill_rx_chain(card);
11f1a52b 1445 spider_net_enable_rxdmac(card);
aaec0fab
JO		 1446 show_error = 0;
1447 break;
1448
1449 /* invalid descriptor */
1450 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1451 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1452 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1453 case SPIDER_NET_GDAINVDINT:
1454 /* could happen when rx chain is full */
1455 spider_net_refill_rx_chain(card);
11f1a52b 1456 spider_net_enable_rxdmac(card);
aaec0fab
JO		 1457 show_error = 0;
1458 break;
1459
1460 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1461 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1462 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1463 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1464 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1465 /* case SPIDER_NET_GDSERINT: problem, print a message */
1466 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1467 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1468 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1469 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1470 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1471 default:
1472 show_error = 1;
1473 break;
1474 }
1475
1476 /* check GHIINT2STS ************************************/
1477 if (error_reg2)
1478 for (i = 0; i < 32; i++)
1479 if (error_reg2 & (1<<i))
1480 switch (i)
1481 {
1482 /* there is nothing we can (want to) do at this time. Log a
1483 * message, we can switch on and off the specific values later on
1484 case SPIDER_NET_GPROPERINT:
1485 case SPIDER_NET_GMCTCRSNGINT:
1486 case SPIDER_NET_GMCTLCOLINT:
1487 case SPIDER_NET_GMCTTMOTINT:
1488 case SPIDER_NET_GMCRCAERINT:
1489 case SPIDER_NET_GMCRCALERINT:
1490 case SPIDER_NET_GMCRALNERINT:
1491 case SPIDER_NET_GMCROVRINT:
1492 case SPIDER_NET_GMCRRNTINT:
1493 case SPIDER_NET_GMCRRXERINT:
1494 case SPIDER_NET_GTITCSERINT:
1495 case SPIDER_NET_GTIFMTERINT:
1496 case SPIDER_NET_GTIPKTRVKINT:
1497 case SPIDER_NET_GTISPINGINT:
1498 case SPIDER_NET_GTISADNGINT:
1499 case SPIDER_NET_GTISPDNGINT:
1500 case SPIDER_NET_GRIFMTERINT:
1501 case SPIDER_NET_GRIPKTRVKINT:
1502 case SPIDER_NET_GRISPINGINT:
1503 case SPIDER_NET_GRISADNGINT:
1504 case SPIDER_NET_GRISPDNGINT:
1505 break;
1506 */
1507 default:
1508 break;
1509 }
1510
5a028877 1511 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
98b9040c 1512 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
aaec0fab 1513 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
98b9040c 1514 card->netdev->name,
aaec0fab
JO		 1515 status_reg, error_reg1, error_reg2);
1516
1517 /* clear interrupt sources */
1518 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1519 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1520}
1521
1522/**
1523 * spider_net_interrupt - interrupt handler for spider_net
1524 * @irq: interupt number
1525 * @ptr: pointer to net_device
1526 * @regs: PU registers
1527 *
1528 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1529 * interrupt found raised by card.
1530 *
1531 * This is the interrupt handler, that turns off
1532 * interrupts for this device and makes the stack poll the driver
1533 */
1534static irqreturn_t
7d12e780 1535spider_net_interrupt(int irq, void *ptr)
aaec0fab
JO		 1536{
1537 struct net_device *netdev = ptr;
1538 struct spider_net_card *card = netdev_priv(netdev);
1539 u32 status_reg;
1540
1541 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1542
1543 if (!status_reg)
1544 return IRQ_NONE;
1545
aaec0fab
JO		 1546 if (status_reg & SPIDER_NET_RXINT ) {
1547 spider_net_rx_irq_off(card);
1548 netif_rx_schedule(netdev);
1549 }
68a8c609
LV		 1550 if (status_reg & SPIDER_NET_TXINT)
1551 netif_rx_schedule(netdev);
aaec0fab 1552
abdb66b5
KI		 1553 if (status_reg & SPIDER_NET_LINKINT)
1554 spider_net_link_reset(netdev);
1555
11f1a52b
AB		 1556 if (status_reg & SPIDER_NET_ERRINT )
1557 spider_net_handle_error_irq(card, status_reg);
aaec0fab
JO		 1558
1559 /* clear interrupt sources */
1560 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1561
1562 return IRQ_HANDLED;
1563}
1564
1565#ifdef CONFIG_NET_POLL_CONTROLLER
1566/**
1567 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1568 * @netdev: interface device structure
1569 *
1570 * see Documentation/networking/netconsole.txt
1571 */
1572static void
1573spider_net_poll_controller(struct net_device *netdev)
1574{
1575 disable_irq(netdev->irq);
7d12e780 1576 spider_net_interrupt(netdev->irq, netdev);
aaec0fab
JO		 1577 enable_irq(netdev->irq);
1578}
1579#endif /* CONFIG_NET_POLL_CONTROLLER */
1580
1581/**
1582 * spider_net_init_card - initializes the card
1583 * @card: card structure
1584 *
1585 * spider_net_init_card initializes the card so that other registers can
1586 * be used
1587 */
1588static void
1589spider_net_init_card(struct spider_net_card *card)
1590{
1591 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1592 SPIDER_NET_CKRCTRL_STOP_VALUE);
1593
1594 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1595 SPIDER_NET_CKRCTRL_RUN_VALUE);
3342cf0e
KI		 1596
1597 /* trigger ETOMOD signal */
1598 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1599 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1600
aaec0fab
JO		 1601}
1602
1603/**
1604 * spider_net_enable_card - enables the card by setting all kinds of regs
1605 * @card: card structure
1606 *
1607 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1608 */
1609static void
1610spider_net_enable_card(struct spider_net_card *card)
1611{
1612 int i;
1613 /* the following array consists of (register),(value) pairs
1614 * that are set in this function. A register of 0 ends the list */
1615 u32 regs[][2] = {
1616 { SPIDER_NET_GRESUMINTNUM, 0 },
1617 { SPIDER_NET_GREINTNUM, 0 },
1618
1619 /* set interrupt frame number registers */
1620 /* clear the single DMA engine registers first */
1621 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1622 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1623 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1624 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1625 /* then set, what we really need */
1626 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1627
1628 /* timer counter registers and stuff */
1629 { SPIDER_NET_GFREECNNUM, 0 },
1630 { SPIDER_NET_GONETIMENUM, 0 },
1631 { SPIDER_NET_GTOUTFRMNUM, 0 },
1632
1633 /* RX mode setting */
1634 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1635 /* TX mode setting */
1636 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1637 /* IPSEC mode setting */
1638 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1639
1640 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1641
1642 { SPIDER_NET_GMRWOLCTRL, 0 },
b636d17a
JO		 1643 { SPIDER_NET_GTESTMD, 0x10000000 },
1644 { SPIDER_NET_GTTQMSK, 0x00400040 },
aaec0fab
JO		 1645
1646 { SPIDER_NET_GMACINTEN, 0 },
1647
1648 /* flow control stuff */
1649 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1650 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1651
1652 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1653 { 0, 0}
1654 };
1655
1656 i = 0;
1657 while (regs[i][0]) {
1658 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1659 i++;
1660 }
1661
1662 /* clear unicast filter table entries 1 to 14 */
1663 for (i = 1; i <= 14; i++) {
1664 spider_net_write_reg(card,
1665 SPIDER_NET_GMRUAFILnR + i * 8,
1666 0x00080000);
1667 spider_net_write_reg(card,
1668 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1669 0x00000000);
1670 }
1671
1672 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1673
1674 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1675
1676 /* set chain tail adress for RX chains and
1677 * enable DMA */
1678 spider_net_enable_rxchtails(card);
1679 spider_net_enable_rxdmac(card);
1680
1681 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1682
aaec0fab
JO		 1683 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1684 SPIDER_NET_LENLMT_VALUE);
aaec0fab
JO		 1685 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1686 SPIDER_NET_OPMODE_VALUE);
1687
1688 /* set interrupt mask registers */
1689 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1690 SPIDER_NET_INT0_MASK_VALUE);
1691 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1692 SPIDER_NET_INT1_MASK_VALUE);
1693 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1694 SPIDER_NET_INT2_MASK_VALUE);
bdd01503
JO		 1695
1696 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
7bd54c86 1697 SPIDER_NET_GDTBSTA);
aaec0fab
JO		 1698}
1699
3cf761dd
KI		 1700/**
1701 * spider_net_download_firmware - loads firmware into the adapter
1702 * @card: card structure
1703 * @firmware_ptr: pointer to firmware data
1704 *
1705 * spider_net_download_firmware loads the firmware data into the
1706 * adapter. It assumes the length etc. to be allright.
1707 */
1708static int
1709spider_net_download_firmware(struct spider_net_card *card,
1710 const void *firmware_ptr)
1711{
1712 int sequencer, i;
1713 const u32 *fw_ptr = firmware_ptr;
1714
1715 /* stop sequencers */
1716 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1717 SPIDER_NET_STOP_SEQ_VALUE);
1718
1719 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1720 sequencer++) {
1721 spider_net_write_reg(card,
1722 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1723 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1724 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1725 sequencer * 8, *fw_ptr);
1726 fw_ptr++;
1727 }
1728 }
1729
1730 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1731 return -EIO;
1732
1733 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1734 SPIDER_NET_RUN_SEQ_VALUE);
1735
1736 return 0;
1737}
1738
1739/**
1740 * spider_net_init_firmware - reads in firmware parts
1741 * @card: card structure
1742 *
1743 * Returns 0 on success, <0 on failure
1744 *
1745 * spider_net_init_firmware opens the sequencer firmware and does some basic
1746 * checks. This function opens and releases the firmware structure. A call
1747 * to download the firmware is performed before the release.
1748 *
1749 * Firmware format
1750 * ===============
1751 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1752 * the program for each sequencer. Use the command
1753 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1754 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1755 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1756 *
1757 * to generate spider_fw.bin, if you have sequencer programs with something
1758 * like the following contents for each sequencer:
1759 * <ONE LINE COMMENT>
1760 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1761 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1762 * ...
1763 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1764 */
1765static int
1766spider_net_init_firmware(struct spider_net_card *card)
1767{
1768 struct firmware *firmware = NULL;
1769 struct device_node *dn;
1770 const u8 *fw_prop = NULL;
1771 int err = -ENOENT;
1772 int fw_size;
1773
1774 if (request_firmware((const struct firmware **)&firmware,
1775 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1776 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1777 netif_msg_probe(card) ) {
1778 pr_err("Incorrect size of spidernet firmware in " \
1779 "filesystem. Looking in host firmware...\n");
1780 goto try_host_fw;
1781 }
1782 err = spider_net_download_firmware(card, firmware->data);
1783
1784 release_firmware(firmware);
1785 if (err)
1786 goto try_host_fw;
1787
1788 goto done;
1789 }
1790
1791try_host_fw:
1792 dn = pci_device_to_OF_node(card->pdev);
1793 if (!dn)
1794 goto out_err;
1795
40cd3a45 1796 fw_prop = of_get_property(dn, "firmware", &fw_size);
3cf761dd
KI		 1797 if (!fw_prop)
1798 goto out_err;
1799
1800 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1801 netif_msg_probe(card) ) {
1802 pr_err("Incorrect size of spidernet firmware in " \
1803 "host firmware\n");
1804 goto done;
1805 }
1806
1807 err = spider_net_download_firmware(card, fw_prop);
1808
1809done:
1810 return err;
1811out_err:
1812 if (netif_msg_probe(card))
1813 pr_err("Couldn't find spidernet firmware in filesystem " \
1814 "or host firmware\n");
1815 return err;
1816}
1817
aaec0fab
JO		 1818/**
1819 * spider_net_open - called upon ifonfig up
1820 * @netdev: interface device structure
1821 *
1822 * returns 0 on success, <0 on failure
1823 *
1824 * spider_net_open allocates all the descriptors and memory needed for
1825 * operation, sets up multicast list and enables interrupts
1826 */
1827int
1828spider_net_open(struct net_device *netdev)
1829{
1830 struct spider_net_card *card = netdev_priv(netdev);
d4ed8f8d 1831 int result;
aaec0fab 1832
3cf761dd
KI		 1833 result = spider_net_init_firmware(card);
1834 if (result)
1835 goto init_firmware_failed;
1836
abdb66b5
KI		 1837 /* start probing with copper */
1838 spider_net_setup_aneg(card);
1839 if (card->phy.def->phy_id)
1840 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1841
d4ed8f8d
LV		 1842 result = spider_net_init_chain(card, &card->tx_chain);
1843 if (result)
aaec0fab 1844 goto alloc_tx_failed;
204e5fa1
LV		 1845 card->low_watermark = NULL;
1846
d4ed8f8d
LV		 1847 result = spider_net_init_chain(card, &card->rx_chain);
1848 if (result)
aaec0fab
JO		 1849 goto alloc_rx_failed;
1850
d4ed8f8d 1851 /* Allocate rx skbs */
aaec0fab
JO		 1852 if (spider_net_alloc_rx_skbs(card))
1853 goto alloc_skbs_failed;
1854
1855 spider_net_set_multi(netdev);
1856
1857 /* further enhancement: setup hw vlan, if needed */
1858
1859 result = -EBUSY;
1860 if (request_irq(netdev->irq, spider_net_interrupt,
1fb9df5d 1861 IRQF_SHARED, netdev->name, netdev))
aaec0fab
JO		 1862 goto register_int_failed;
1863
1864 spider_net_enable_card(card);
1865
543cec51
JO		 1866 netif_start_queue(netdev);
1867 netif_carrier_on(netdev);
1868 netif_poll_enable(netdev);
1869
aaec0fab
JO		 1870 return 0;
1871
1872register_int_failed:
1873 spider_net_free_rx_chain_contents(card);
1874alloc_skbs_failed:
1875 spider_net_free_chain(card, &card->rx_chain);
1876alloc_rx_failed:
1877 spider_net_free_chain(card, &card->tx_chain);
1878alloc_tx_failed:
abdb66b5 1879 del_timer_sync(&card->aneg_timer);
3cf761dd 1880init_firmware_failed:
aaec0fab
JO		 1881 return result;
1882}
1883
abdb66b5
KI		 1884/**
1885 * spider_net_link_phy
1886 * @data: used for pointer to card structure
1887 *
1888 */
1889static void spider_net_link_phy(unsigned long data)
1890{
1891 struct spider_net_card *card = (struct spider_net_card *)data;
1892 struct mii_phy *phy = &card->phy;
1893
1894 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
1895 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
1896
1897 pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
1898
4b23a554
JO		 1899 switch (card->medium) {
1900 case BCM54XX_COPPER:
abdb66b5
KI		 1901 /* enable fiber with autonegotiation first */
1902 if (phy->def->ops->enable_fiber)
1903 phy->def->ops->enable_fiber(phy, 1);
4b23a554 1904 card->medium = BCM54XX_FIBER;
abdb66b5
KI		 1905 break;
1906
4b23a554 1907 case BCM54XX_FIBER:
abdb66b5
KI		 1908 /* fiber didn't come up, try to disable fiber autoneg */
1909 if (phy->def->ops->enable_fiber)
1910 phy->def->ops->enable_fiber(phy, 0);
4b23a554 1911 card->medium = BCM54XX_UNKNOWN;
abdb66b5
KI		 1912 break;
1913
4b23a554 1914 case BCM54XX_UNKNOWN:
abdb66b5
KI		 1915 /* copper, fiber with and without failed,
1916 * retry from beginning */
1917 spider_net_setup_aneg(card);
4b23a554 1918 card->medium = BCM54XX_COPPER;
abdb66b5
KI		 1919 break;
1920 }
1921
1922 card->aneg_count = 0;
1923 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1924 return;
1925 }
1926
1927 /* link still not up, try again later */
1928 if (!(phy->def->ops->poll_link(phy))) {
1929 card->aneg_count++;
1930 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1931 return;
1932 }
1933
1934 /* link came up, get abilities */
1935 phy->def->ops->read_link(phy);
1936
1937 spider_net_write_reg(card, SPIDER_NET_GMACST,
1938 spider_net_read_reg(card, SPIDER_NET_GMACST));
1939 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
1940
1941 if (phy->speed == 1000)
1942 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
1943 else
1944 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
1945
1946 card->aneg_count = 0;
1947
1948 pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
1949 phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
1950 phy->autoneg==1 ? "" : "no ");
1951
1952 return;
1953}
1954
aaec0fab
JO		 1955/**
1956 * spider_net_setup_phy - setup PHY
1957 * @card: card structure
1958 *
1959 * returns 0 on success, <0 on failure
1960 *
abdb66b5 1961 * spider_net_setup_phy is used as part of spider_net_probe.
aaec0fab
JO		 1962 **/
1963static int
1964spider_net_setup_phy(struct spider_net_card *card)
1965{
1966 struct mii_phy *phy = &card->phy;
1967
1968 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1969 SPIDER_NET_DMASEL_VALUE);
1970 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1971 SPIDER_NET_PHY_CTRL_VALUE);
abdb66b5 1972
aaec0fab
JO		 1973 phy->dev = card->netdev;
1974 phy->mdio_read = spider_net_read_phy;
1975 phy->mdio_write = spider_net_write_phy;
1976
abdb66b5
KI		 1977 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
1978 unsigned short id;
1979 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
1980 if (id != 0x0000 && id != 0xffff) {
1981 if (!mii_phy_probe(phy, phy->mii_id)) {
1982 pr_info("Found %s.\n", phy->def->name);
1983 break;
1984 }
1985 }
1986 }
aaec0fab
JO		 1987
1988 return 0;
1989}
1990
aaec0fab
JO		 1991/**
1992 * spider_net_workaround_rxramfull - work around firmware bug
1993 * @card: card structure
1994 *
1995 * no return value
1996 **/
1997static void
1998spider_net_workaround_rxramfull(struct spider_net_card *card)
1999{
2000 int i, sequencer = 0;
2001
2002 /* cancel reset */
2003 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2004 SPIDER_NET_CKRCTRL_RUN_VALUE);
2005
2006 /* empty sequencer data */
11f1a52b
AB		 2007 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2008 sequencer++) {
ee962a5c 2009 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
aaec0fab 2010 sequencer * 8, 0x0);
11f1a52b 2011 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
aaec0fab
JO		 2012 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2013 sequencer * 8, 0x0);
2014 }
2015 }
2016
2017 /* set sequencer operation */
2018 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2019
2020 /* reset */
2021 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2022 SPIDER_NET_CKRCTRL_STOP_VALUE);
2023}
2024
bdd01503
JO		 2025/**
2026 * spider_net_stop - called upon ifconfig down
2027 * @netdev: interface device structure
2028 *
2029 * always returns 0
2030 */
2031int
2032spider_net_stop(struct net_device *netdev)
2033{
2034 struct spider_net_card *card = netdev_priv(netdev);
2035
bdd01503
JO		 2036 netif_poll_disable(netdev);
2037 netif_carrier_off(netdev);
2038 netif_stop_queue(netdev);
2039 del_timer_sync(&card->tx_timer);
abdb66b5 2040 del_timer_sync(&card->aneg_timer);
bdd01503
JO		 2041
2042 /* disable/mask all interrupts */
2043 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
2044 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
2045 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
abdb66b5 2046 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
bdd01503 2047
d406eafe 2048 free_irq(netdev->irq, netdev);
bdd01503
JO		 2049
2050 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2051 SPIDER_NET_DMA_TX_FEND_VALUE);
2052
2053 /* turn off DMA, force end */
2054 spider_net_disable_rxdmac(card);
2055
2056 /* release chains */
9cc7bf7e 2057 spider_net_release_tx_chain(card, 1);
d4ed8f8d 2058 spider_net_free_rx_chain_contents(card);
bdd01503
JO		 2059
2060 spider_net_free_chain(card, &card->tx_chain);
2061 spider_net_free_chain(card, &card->rx_chain);
2062
2063 return 0;
2064}
2065
aaec0fab
JO		 2066/**
2067 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2068 * function (to be called not under interrupt status)
2069 * @data: data, is interface device structure
2070 *
2071 * called as task when tx hangs, resets interface (if interface is up)
2072 */
2073static void
c4028958 2074spider_net_tx_timeout_task(struct work_struct *work)
aaec0fab 2075{
c4028958
DH		 2076 struct spider_net_card *card =
2077 container_of(work, struct spider_net_card, tx_timeout_task);
2078 struct net_device *netdev = card->netdev;
aaec0fab
JO		 2079
2080 if (!(netdev->flags & IFF_UP))
2081 goto out;
2082
2083 netif_device_detach(netdev);
2084 spider_net_stop(netdev);
2085
2086 spider_net_workaround_rxramfull(card);
2087 spider_net_init_card(card);
2088
2089 if (spider_net_setup_phy(card))
2090 goto out;
aaec0fab
JO		 2091
2092 spider_net_open(netdev);
bdd01503 2093 spider_net_kick_tx_dma(card);
aaec0fab
JO		 2094 netif_device_attach(netdev);
2095
2096out:
2097 atomic_dec(&card->tx_timeout_task_counter);
2098}
2099
2100/**
2101 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2102 * @netdev: interface device structure
2103 *
2104 * called, if tx hangs. Schedules a task that resets the interface
2105 */
2106static void
2107spider_net_tx_timeout(struct net_device *netdev)
2108{
2109 struct spider_net_card *card;
2110
2111 card = netdev_priv(netdev);
2112 atomic_inc(&card->tx_timeout_task_counter);
2113 if (netdev->flags & IFF_UP)
2114 schedule_work(&card->tx_timeout_task);
2115 else
2116 atomic_dec(&card->tx_timeout_task_counter);
9b6b0b81 2117 card->spider_stats.tx_timeouts++;
aaec0fab
JO		 2118}
2119
2120/**
2121 * spider_net_setup_netdev_ops - initialization of net_device operations
2122 * @netdev: net_device structure
2123 *
2124 * fills out function pointers in the net_device structure
2125 */
2126static void
2127spider_net_setup_netdev_ops(struct net_device *netdev)
2128{
2129 netdev->open = &spider_net_open;
2130 netdev->stop = &spider_net_stop;
2131 netdev->hard_start_xmit = &spider_net_xmit;
2132 netdev->get_stats = &spider_net_get_stats;
2133 netdev->set_multicast_list = &spider_net_set_multi;
2134 netdev->set_mac_address = &spider_net_set_mac;
2135 netdev->change_mtu = &spider_net_change_mtu;
2136 netdev->do_ioctl = &spider_net_do_ioctl;
2137 /* tx watchdog */
2138 netdev->tx_timeout = &spider_net_tx_timeout;
2139 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2140 /* NAPI */
2141 netdev->poll = &spider_net_poll;
2142 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2143 /* HW VLAN */
aaec0fab
JO		 2144#ifdef CONFIG_NET_POLL_CONTROLLER
2145 /* poll controller */
2146 netdev->poll_controller = &spider_net_poll_controller;
2147#endif /* CONFIG_NET_POLL_CONTROLLER */
2148 /* ethtool ops */
2149 netdev->ethtool_ops = &spider_net_ethtool_ops;
2150}
2151
2152/**
2153 * spider_net_setup_netdev - initialization of net_device
2154 * @card: card structure
2155 *
2156 * Returns 0 on success or <0 on failure
2157 *
2158 * spider_net_setup_netdev initializes the net_device structure
2159 **/
2160static int
2161spider_net_setup_netdev(struct spider_net_card *card)
2162{
2163 int result;
2164 struct net_device *netdev = card->netdev;
2165 struct device_node *dn;
2166 struct sockaddr addr;
1a2509c9 2167 const u8 *mac;
aaec0fab
JO		 2168
2169 SET_MODULE_OWNER(netdev);
2170 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2171
2172 pci_set_drvdata(card->pdev, netdev);
11f1a52b 2173
11f1a52b
AB		 2174 init_timer(&card->tx_timer);
2175 card->tx_timer.function =
2176 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2177 card->tx_timer.data = (unsigned long) card;
aaec0fab
JO		 2178 netdev->irq = card->pdev->irq;
2179
abdb66b5
KI		 2180 card->aneg_count = 0;
2181 init_timer(&card->aneg_timer);
2182 card->aneg_timer.function = spider_net_link_phy;
2183 card->aneg_timer.data = (unsigned long) card;
2184
aaec0fab
JO		 2185 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2186
2187 spider_net_setup_netdev_ops(netdev);
2188
bdd01503 2189 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
aaec0fab
JO		 2190 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2191 * NETIF_F_HW_VLAN_FILTER */
2192
2193 netdev->irq = card->pdev->irq;
2194
2195 dn = pci_device_to_OF_node(card->pdev);
543cec51
JO		 2196 if (!dn)
2197 return -EIO;
2198
40cd3a45 2199 mac = of_get_property(dn, "local-mac-address", NULL);
543cec51
JO		 2200 if (!mac)
2201 return -EIO;
aaec0fab
JO		 2202 memcpy(addr.sa_data, mac, ETH_ALEN);
2203
2204 result = spider_net_set_mac(netdev, &addr);
2205 if ((result) && (netif_msg_probe(card)))
2206 pr_err("Failed to set MAC address: %i\n", result);
2207
2208 result = register_netdev(netdev);
2209 if (result) {
2210 if (netif_msg_probe(card))
2211 pr_err("Couldn't register net_device: %i\n",
2212 result);
2213 return result;
2214 }
2215
2216 if (netif_msg_probe(card))
2217 pr_info("Initialized device %s.\n", netdev->name);
2218
2219 return 0;
2220}
2221
2222/**
2223 * spider_net_alloc_card - allocates net_device and card structure
2224 *
2225 * returns the card structure or NULL in case of errors
2226 *
2227 * the card and net_device structures are linked to each other
2228 */
2229static struct spider_net_card *
2230spider_net_alloc_card(void)
2231{
2232 struct net_device *netdev;
2233 struct spider_net_card *card;
4cb6f9e5 2234 size_t alloc_size;
aaec0fab 2235
4cb6f9e5
LV		 2236 alloc_size = sizeof(struct spider_net_card) +
2237 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2238 netdev = alloc_etherdev(alloc_size);
aaec0fab
JO		 2239 if (!netdev)
2240 return NULL;
2241
2242 card = netdev_priv(netdev);
2243 card->netdev = netdev;
2244 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
c4028958 2245 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
aaec0fab
JO		 2246 init_waitqueue_head(&card->waitq);
2247 atomic_set(&card->tx_timeout_task_counter, 0);
2248
4cb6f9e5
LV		 2249 card->rx_chain.num_desc = rx_descriptors;
2250 card->rx_chain.ring = card->darray;
2251 card->tx_chain.num_desc = tx_descriptors;
2252 card->tx_chain.ring = card->darray + rx_descriptors;
2253
aaec0fab
JO		 2254 return card;
2255}
2256
2257/**
2258 * spider_net_undo_pci_setup - releases PCI ressources
2259 * @card: card structure
2260 *
2261 * spider_net_undo_pci_setup releases the mapped regions
2262 */
2263static void
2264spider_net_undo_pci_setup(struct spider_net_card *card)
2265{
2266 iounmap(card->regs);
2267 pci_release_regions(card->pdev);
2268}
2269
2270/**
2271 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2272 * @card: card structure
2273 * @pdev: PCI device
2274 *
2275 * Returns the card structure or NULL if any errors occur
2276 *
2277 * spider_net_setup_pci_dev initializes pdev and together with the
2278 * functions called in spider_net_open configures the device so that
2279 * data can be transferred over it
2280 * The net_device structure is attached to the card structure, if the
2281 * function returns without error.
2282 **/
2283static struct spider_net_card *
2284spider_net_setup_pci_dev(struct pci_dev *pdev)
2285{
2286 struct spider_net_card *card;
2287 unsigned long mmio_start, mmio_len;
2288
2289 if (pci_enable_device(pdev)) {
2290 pr_err("Couldn't enable PCI device\n");
2291 return NULL;
2292 }
2293
2294 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2295 pr_err("Couldn't find proper PCI device base address.\n");
2296 goto out_disable_dev;
2297 }
2298
2299 if (pci_request_regions(pdev, spider_net_driver_name)) {
2300 pr_err("Couldn't obtain PCI resources, aborting.\n");
2301 goto out_disable_dev;
2302 }
2303
2304 pci_set_master(pdev);
2305
2306 card = spider_net_alloc_card();
2307 if (!card) {
2308 pr_err("Couldn't allocate net_device structure, "
2309 "aborting.\n");
2310 goto out_release_regions;
2311 }
2312 card->pdev = pdev;
2313
2314 /* fetch base address and length of first resource */
2315 mmio_start = pci_resource_start(pdev, 0);
2316 mmio_len = pci_resource_len(pdev, 0);
2317
2318 card->netdev->mem_start = mmio_start;
2319 card->netdev->mem_end = mmio_start + mmio_len;
2320 card->regs = ioremap(mmio_start, mmio_len);
2321
2322 if (!card->regs) {
2323 pr_err("Couldn't obtain PCI resources, aborting.\n");
2324 goto out_release_regions;
2325 }
2326
2327 return card;
2328
2329out_release_regions:
2330 pci_release_regions(pdev);
2331out_disable_dev:
2332 pci_disable_device(pdev);
2333 pci_set_drvdata(pdev, NULL);
2334 return NULL;
2335}
2336
2337/**
2338 * spider_net_probe - initialization of a device
2339 * @pdev: PCI device
2340 * @ent: entry in the device id list
2341 *
2342 * Returns 0 on success, <0 on failure
2343 *
2344 * spider_net_probe initializes pdev and registers a net_device
2345 * structure for it. After that, the device can be ifconfig'ed up
2346 **/
2347static int __devinit
2348spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2349{
2350 int err = -EIO;
2351 struct spider_net_card *card;
2352
2353 card = spider_net_setup_pci_dev(pdev);
2354 if (!card)
2355 goto out;
2356
2357 spider_net_workaround_rxramfull(card);
2358 spider_net_init_card(card);
2359
2360 err = spider_net_setup_phy(card);
2361 if (err)
2362 goto out_undo_pci;
2363
aaec0fab
JO		 2364 err = spider_net_setup_netdev(card);
2365 if (err)
2366 goto out_undo_pci;
2367
2368 return 0;
2369
2370out_undo_pci:
2371 spider_net_undo_pci_setup(card);
2372 free_netdev(card->netdev);
2373out:
2374 return err;
2375}
2376
2377/**
2378 * spider_net_remove - removal of a device
2379 * @pdev: PCI device
2380 *
2381 * Returns 0 on success, <0 on failure
2382 *
2383 * spider_net_remove is called to remove the device and unregisters the
2384 * net_device
2385 **/
2386static void __devexit
2387spider_net_remove(struct pci_dev *pdev)
2388{
2389 struct net_device *netdev;
2390 struct spider_net_card *card;
2391
2392 netdev = pci_get_drvdata(pdev);
2393 card = netdev_priv(netdev);
2394
2395 wait_event(card->waitq,
2396 atomic_read(&card->tx_timeout_task_counter) == 0);
2397
2398 unregister_netdev(netdev);
543cec51
JO		 2399
2400 /* switch off card */
2401 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2402 SPIDER_NET_CKRCTRL_STOP_VALUE);
2403 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2404 SPIDER_NET_CKRCTRL_RUN_VALUE);
2405
aaec0fab
JO		 2406 spider_net_undo_pci_setup(card);
2407 free_netdev(netdev);
aaec0fab
JO		 2408}
2409
2410static struct pci_driver spider_net_driver = {
aaec0fab
JO		 2411 .name = spider_net_driver_name,
2412 .id_table = spider_net_pci_tbl,
2413 .probe = spider_net_probe,
2414 .remove = __devexit_p(spider_net_remove)
2415};
2416
2417/**
2418 * spider_net_init - init function when the driver is loaded
2419 *
2420 * spider_net_init registers the device driver
2421 */
2422static int __init spider_net_init(void)
2423{
90f10841
LV		 2424 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2425
aaec0fab
JO		 2426 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2427 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2428 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2429 }
2430 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2431 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2432 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2433 }
2434 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2435 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2436 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2437 }
2438 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2439 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2440 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2441 }
2442
2443 return pci_register_driver(&spider_net_driver);
2444}
2445
2446/**
2447 * spider_net_cleanup - exit function when driver is unloaded
2448 *
2449 * spider_net_cleanup unregisters the device driver
2450 */
2451static void __exit spider_net_cleanup(void)
2452{
2453 pci_unregister_driver(&spider_net_driver);
2454}
2455
2456module_init(spider_net_init);
2457module_exit(spider_net_cleanup);
Clone of davem's net-next-2.6 tree