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spidernet: change interrupt masks
[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>
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);
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 436 if (netif_msg_rx_err(card) && net_ratelimit())
e6311d85
LV		 437 dev_err(&card->netdev->dev,
438 "Not enough memory to allocate rx buffer\n");
9b6b0b81 439 card->spider_stats.alloc_rx_skb_error++;
aaec0fab
JO		 440 return -ENOMEM;
441 }
4cb6f9e5
LV		 442 hwdescr->buf_size = bufsize;
443 hwdescr->result_size = 0;
444 hwdescr->valid_size = 0;
445 hwdescr->data_status = 0;
446 hwdescr->data_error = 0;
aaec0fab
JO		 447
448 offset = ((unsigned long)descr->skb->data) &
449 (SPIDER_NET_RXBUF_ALIGN - 1);
450 if (offset)
451 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
a4182c50 452 /* iommu-map the skb */
8e0a613b 453 buf = pci_map_single(card->pdev, descr->skb->data,
bdd01503 454 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
d4b0a4c1 455 if (pci_dma_mapping_error(buf)) {
aaec0fab 456 dev_kfree_skb_any(descr->skb);
d9c199ee 457 descr->skb = NULL;
11f1a52b 458 if (netif_msg_rx_err(card) && net_ratelimit())
e6311d85 459 dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
9b6b0b81 460 card->spider_stats.rx_iommu_map_error++;
4cb6f9e5 461 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
aaec0fab 462 } else {
4cb6f9e5 463 hwdescr->buf_addr = buf;
90476a20 464 wmb();
4cb6f9e5 465 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
bdd01503 466 SPIDER_NET_DMAC_NOINTR_COMPLETE;
aaec0fab
JO		 467 }
468
a4182c50 469 return 0;
aaec0fab
JO		 470}
471
472/**
11f1a52b 473 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
aaec0fab
JO		 474 * @card: card structure
475 *
11f1a52b 476 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
aaec0fab
JO		 477 * chip by writing to the appropriate register. DMA is enabled in
478 * spider_net_enable_rxdmac.
479 */
bdd01503 480static inline void
aaec0fab
JO		 481spider_net_enable_rxchtails(struct spider_net_card *card)
482{
483 /* assume chain is aligned correctly */
484 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
485 card->rx_chain.tail->bus_addr);
486}
487
488/**
489 * spider_net_enable_rxdmac - enables a receive DMA controller
490 * @card: card structure
491 *
492 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
493 * in the GDADMACCNTR register
494 */
bdd01503 495static inline void
aaec0fab
JO		 496spider_net_enable_rxdmac(struct spider_net_card *card)
497{
11f1a52b 498 wmb();
aaec0fab
JO		 499 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
500 SPIDER_NET_DMA_RX_VALUE);
501}
502
59a11f88
LV		 503/**
504 * spider_net_disable_rxdmac - disables the receive DMA controller
505 * @card: card structure
506 *
507 * spider_net_disable_rxdmac terminates processing on the DMA controller
508 * by turing off the DMA controller, with the force-end flag set.
509 */
510static inline void
511spider_net_disable_rxdmac(struct spider_net_card *card)
512{
513 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
514 SPIDER_NET_DMA_RX_FEND_VALUE);
515}
516
aaec0fab
JO		 517/**
518 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
519 * @card: card structure
520 *
11f1a52b 521 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
aaec0fab
JO		 522 */
523static void
524spider_net_refill_rx_chain(struct spider_net_card *card)
525{
bdd01503
JO		 526 struct spider_net_descr_chain *chain = &card->rx_chain;
527 unsigned long flags;
aaec0fab 528
11f1a52b
AB		 529 /* one context doing the refill (and a second context seeing that
530 * and omitting it) is ok. If called by NAPI, we'll be called again
531 * as spider_net_decode_one_descr is called several times. If some
532 * interrupt calls us, the NAPI is about to clean up anyway. */
bdd01503
JO		 533 if (!spin_trylock_irqsave(&chain->lock, flags))
534 return;
535
4cb6f9e5 536 while (spider_net_get_descr_status(chain->head->hwdescr) ==
bdd01503
JO		 537 SPIDER_NET_DESCR_NOT_IN_USE) {
538 if (spider_net_prepare_rx_descr(card, chain->head))
539 break;
540 chain->head = chain->head->next;
541 }
aaec0fab 542
bdd01503 543 spin_unlock_irqrestore(&chain->lock, flags);
aaec0fab
JO		 544}
545
546/**
2c307db7 547 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
aaec0fab
JO		 548 * @card: card structure
549 *
2c307db7 550 * Returns 0 on success, <0 on failure.
aaec0fab
JO		 551 */
552static int
553spider_net_alloc_rx_skbs(struct spider_net_card *card)
554{
2bf27a0d
LV		 555 struct spider_net_descr_chain *chain = &card->rx_chain;
556 struct spider_net_descr *start = chain->tail;
557 struct spider_net_descr *descr = start;
aaec0fab 558
2bf27a0d
LV		 559 /* Link up the hardware chain pointers */
560 do {
561 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
562 descr = descr->next;
563 } while (descr != start);
aaec0fab 564
2c307db7
LV		 565 /* Put at least one buffer into the chain. if this fails,
566 * we've got a problem. If not, spider_net_refill_rx_chain
567 * will do the rest at the end of this function. */
aaec0fab
JO		 568 if (spider_net_prepare_rx_descr(card, chain->head))
569 goto error;
570 else
571 chain->head = chain->head->next;
572
2c307db7
LV		 573 /* This will allocate the rest of the rx buffers;
574 * if not, it's business as usual later on. */
aaec0fab 575 spider_net_refill_rx_chain(card);
11f1a52b 576 spider_net_enable_rxdmac(card);
aaec0fab
JO		 577 return 0;
578
579error:
580 spider_net_free_rx_chain_contents(card);
2bf27a0d 581 return -ENOMEM;
aaec0fab
JO		 582}
583
aaec0fab
JO		 584/**
585 * spider_net_get_multicast_hash - generates hash for multicast filter table
586 * @addr: multicast address
587 *
588 * returns the hash value.
589 *
590 * spider_net_get_multicast_hash calculates a hash value for a given multicast
591 * address, that is used to set the multicast filter tables
592 */
593static u8
594spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
595{
aaec0fab
JO		 596 u32 crc;
597 u8 hash;
11f1a52b
AB		 598 char addr_for_crc[ETH_ALEN] = { 0, };
599 int i, bit;
600
601 for (i = 0; i < ETH_ALEN * 8; i++) {
602 bit = (addr[i / 8] >> (i % 8)) & 1;
603 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
604 }
aaec0fab 605
11f1a52b 606 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
aaec0fab
JO		 607
608 hash = (crc >> 27);
609 hash <<= 3;
610 hash |= crc & 7;
11f1a52b 611 hash &= 0xff;
aaec0fab
JO		 612
613 return hash;
614}
615
616/**
617 * spider_net_set_multi - sets multicast addresses and promisc flags
618 * @netdev: interface device structure
619 *
620 * spider_net_set_multi configures multicast addresses as needed for the
621 * netdev interface. It also sets up multicast, allmulti and promisc
622 * flags appropriately
623 */
624static void
625spider_net_set_multi(struct net_device *netdev)
626{
627 struct dev_mc_list *mc;
628 u8 hash;
629 int i;
630 u32 reg;
631 struct spider_net_card *card = netdev_priv(netdev);
632 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
633 {0, };
634
635 spider_net_set_promisc(card);
636
637 if (netdev->flags & IFF_ALLMULTI) {
638 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
639 set_bit(i, bitmask);
640 }
641 goto write_hash;
642 }
643
644 /* well, we know, what the broadcast hash value is: it's xfd
645 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
646 set_bit(0xfd, bitmask);
647
648 for (mc = netdev->mc_list; mc; mc = mc->next) {
649 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
650 set_bit(hash, bitmask);
651 }
652
653write_hash:
654 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
655 reg = 0;
656 if (test_bit(i * 4, bitmask))
657 reg += 0x08;
658 reg <<= 8;
659 if (test_bit(i * 4 + 1, bitmask))
660 reg += 0x08;
661 reg <<= 8;
662 if (test_bit(i * 4 + 2, bitmask))
663 reg += 0x08;
664 reg <<= 8;
665 if (test_bit(i * 4 + 3, bitmask))
666 reg += 0x08;
667
668 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
669 }
670}
671
aaec0fab
JO		 672/**
673 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
674 * @card: card structure
675 * @descr: descriptor structure to fill out
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);
d4b0a4c1 694 if (pci_dma_mapping_error(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
793 * scheduled again (if we were scheduled) and will not loose initiative.
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
870 * @descr: descriptor address to enable TX processing at
871 *
a664ccf4
LV		 872 * This routine will start the transmit DMA running if
873 * it is not already running. This routine ned only be
874 * called when queueing a new packet to an empty tx queue.
875 * Writes the current tx chain head as start address
876 * of the tx descriptor chain and enables the transmission
877 * DMA engine.
aaec0fab 878 */
bdd01503
JO		 879static inline void
880spider_net_kick_tx_dma(struct spider_net_card *card)
aaec0fab 881{
bdd01503 882 struct spider_net_descr *descr;
aaec0fab 883
bdd01503
JO		 884 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
885 SPIDER_NET_TX_DMA_EN)
886 goto out;
aaec0fab 887
bdd01503
JO		 888 descr = card->tx_chain.tail;
889 for (;;) {
4cb6f9e5 890 if (spider_net_get_descr_status(descr->hwdescr) ==
bdd01503
JO		 891 SPIDER_NET_DESCR_CARDOWNED) {
892 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
893 descr->bus_addr);
894 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
895 SPIDER_NET_DMA_TX_VALUE);
896 break;
897 }
898 if (descr == card->tx_chain.head)
899 break;
900 descr = descr->next;
901 }
902
903out:
904 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
aaec0fab
JO		 905}
906
907/**
908 * spider_net_xmit - transmits a frame over the device
909 * @skb: packet to send out
910 * @netdev: interface device structure
911 *
bdd01503 912 * returns 0 on success, !0 on failure
aaec0fab
JO		 913 */
914static int
915spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
916{
a664ccf4 917 int cnt;
aaec0fab 918 struct spider_net_card *card = netdev_priv(netdev);
bdd01503 919
11f1a52b 920 spider_net_release_tx_chain(card, 0);
aaec0fab 921
d9c199ee 922 if (spider_net_prepare_tx_descr(card, skb) != 0) {
09f75cd7 923 netdev->stats.tx_dropped++;
313ef4b7
LV		 924 netif_stop_queue(netdev);
925 return NETDEV_TX_BUSY;
bdd01503 926 }
aaec0fab 927
a664ccf4
LV		 928 cnt = spider_net_set_low_watermark(card);
929 if (cnt < 5)
930 spider_net_kick_tx_dma(card);
313ef4b7 931 return NETDEV_TX_OK;
bdd01503 932}
11f1a52b 933
bdd01503
JO		 934/**
935 * spider_net_cleanup_tx_ring - cleans up the TX ring
936 * @card: card structure
937 *
68a8c609
LV		 938 * spider_net_cleanup_tx_ring is called by either the tx_timer
939 * or from the NAPI polling routine.
940 * This routine releases resources associted with transmitted
941 * packets, including updating the queue tail pointer.
bdd01503
JO		 942 */
943static void
944spider_net_cleanup_tx_ring(struct spider_net_card *card)
945{
bdd01503 946 if ((spider_net_release_tx_chain(card, 0) != 0) &&
313ef4b7 947 (card->netdev->flags & IFF_UP)) {
bdd01503 948 spider_net_kick_tx_dma(card);
313ef4b7
LV		 949 netif_wake_queue(card->netdev);
950 }
aaec0fab
JO		 951}
952
953/**
954 * spider_net_do_ioctl - called for device ioctls
955 * @netdev: interface device structure
956 * @ifr: request parameter structure for ioctl
957 * @cmd: command code for ioctl
958 *
959 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
960 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
961 */
962static int
963spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
964{
965 switch (cmd) {
966 default:
967 return -EOPNOTSUPP;
968 }
969}
970
971/**
972 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
973 * @descr: descriptor to process
974 * @card: card structure
975 *
05b346b5
LV		 976 * Fills out skb structure and passes the data to the stack.
977 * The descriptor state is not changed.
aaec0fab 978 */
7f7223b8 979static void
aaec0fab 980spider_net_pass_skb_up(struct spider_net_descr *descr,
1cd173f6 981 struct spider_net_card *card)
aaec0fab 982{
09f75cd7
JG		 983 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
984 struct sk_buff *skb = descr->skb;
985 struct net_device *netdev = card->netdev;
986 u32 data_status = hwdescr->data_status;
987 u32 data_error = hwdescr->data_error;
aaec0fab 988
4cb6f9e5 989 skb_put(skb, hwdescr->valid_size);
aaec0fab
JO		 990
991 /* the card seems to add 2 bytes of junk in front
992 * of the ethernet frame */
993#define SPIDER_MISALIGN 2
994 skb_pull(skb, SPIDER_MISALIGN);
995 skb->protocol = eth_type_trans(skb, netdev);
996
997 /* checksum offload */
998 if (card->options.rx_csum) {
11f1a52b
AB		 999 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
1000 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
1001 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
aaec0fab
JO		 1002 skb->ip_summed = CHECKSUM_UNNECESSARY;
1003 else
1004 skb->ip_summed = CHECKSUM_NONE;
11f1a52b 1005 } else
aaec0fab 1006 skb->ip_summed = CHECKSUM_NONE;
aaec0fab
JO		 1007
1008 if (data_status & SPIDER_NET_VLAN_PACKET) {
1009 /* further enhancements: HW-accel VLAN
1010 * vlan_hwaccel_receive_skb
1011 */
1012 }
1013
aaec0fab 1014 /* update netdevice statistics */
09f75cd7
JG		 1015 netdev->stats.rx_packets++;
1016 netdev->stats.rx_bytes += skb->len;
93c1d3b7
FM		 1017
1018 /* pass skb up to stack */
1019 netif_receive_skb(skb);
aaec0fab
JO		 1020}
1021
6d24998f
LV		 1022static void show_rx_chain(struct spider_net_card *card)
1023{
1024 struct spider_net_descr_chain *chain = &card->rx_chain;
1025 struct spider_net_descr *start= chain->tail;
1026 struct spider_net_descr *descr= start;
9948357d
LV		 1027 struct spider_net_hw_descr *hwd = start->hwdescr;
1028 struct device *dev = &card->netdev->dev;
1029 u32 curr_desc, next_desc;
6d24998f
LV		 1030 int status;
1031
9948357d 1032 int tot = 0;
6d24998f 1033 int cnt = 0;
9948357d
LV		 1034 int off = start - chain->ring;
1035 int cstat = hwd->dmac_cmd_status;
1036
1037 dev_info(dev, "Total number of descrs=%d\n",
1038 chain->num_desc);
1039 dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
1040 off, cstat);
1041
1042 curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
1043 next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
1044
6d24998f
LV		 1045 status = cstat;
1046 do
1047 {
9948357d
LV		 1048 hwd = descr->hwdescr;
1049 off = descr - chain->ring;
1050 status = hwd->dmac_cmd_status;
1051
1052 if (descr == chain->head)
1053 dev_info(dev, "Chain head is at %d, head status=0x%x\n",
1054 off, status);
1055
1056 if (curr_desc == descr->bus_addr)
1057 dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
1058 off, status);
1059
1060 if (next_desc == descr->bus_addr)
1061 dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
1062 off, status);
1063
1064 if (hwd->next_descr_addr == 0)
1065 dev_info(dev, "chain is cut at %d\n", off);
1066
6d24998f 1067 if (cstat != status) {
9948357d
LV		 1068 int from = (chain->num_desc + off - cnt) % chain->num_desc;
1069 int to = (chain->num_desc + off - 1) % chain->num_desc;
1070 dev_info(dev, "Have %d (from %d to %d) descrs "
1071 "with stat=0x%08x\n", cnt, from, to, cstat);
6d24998f
LV		 1072 cstat = status;
1073 cnt = 0;
1074 }
9948357d 1075
6d24998f 1076 cnt ++;
9948357d
LV		 1077 tot ++;
1078 descr = descr->next;
1079 } while (descr != start);
1080
1081 dev_info(dev, "Last %d descrs with stat=0x%08x "
1082 "for a total of %d descrs\n", cnt, cstat, tot);
1083
1084#ifdef DEBUG
1085 /* Now dump the whole ring */
1086 descr = start;
1087 do
1088 {
1089 struct spider_net_hw_descr *hwd = descr->hwdescr;
1090 status = spider_net_get_descr_status(hwd);
1091 cnt = descr - chain->ring;
1092 dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
1093 cnt, status, descr->skb);
1094 dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
1095 descr->bus_addr, hwd->buf_addr, hwd->buf_size);
1096 dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
1097 hwd->next_descr_addr, hwd->result_size,
1098 hwd->valid_size);
1099 dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
1100 hwd->dmac_cmd_status, hwd->data_status,
1101 hwd->data_error);
1102 dev_info(dev, "\n");
1103
6d24998f
LV		 1104 descr = descr->next;
1105 } while (descr != start);
6d24998f
LV		 1106#endif
1107
9948357d
LV		 1108}
1109
4c4bd5a9
LV		 1110/**
1111 * spider_net_resync_head_ptr - Advance head ptr past empty descrs
1112 *
1113 * If the driver fails to keep up and empty the queue, then the
1114 * hardware wil run out of room to put incoming packets. This
1115 * will cause the hardware to skip descrs that are full (instead
1116 * of halting/retrying). Thus, once the driver runs, it wil need
1117 * to "catch up" to where the hardware chain pointer is at.
1118 */
1119static void spider_net_resync_head_ptr(struct spider_net_card *card)
1120{
1121 unsigned long flags;
1122 struct spider_net_descr_chain *chain = &card->rx_chain;
1123 struct spider_net_descr *descr;
1124 int i, status;
1125
1126 /* Advance head pointer past any empty descrs */
1127 descr = chain->head;
1128 status = spider_net_get_descr_status(descr->hwdescr);
1129
1130 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
1131 return;
1132
1133 spin_lock_irqsave(&chain->lock, flags);
1134
1135 descr = chain->head;
1136 status = spider_net_get_descr_status(descr->hwdescr);
1137 for (i=0; i<chain->num_desc; i++) {
1138 if (status != SPIDER_NET_DESCR_CARDOWNED) break;
1139 descr = descr->next;
1140 status = spider_net_get_descr_status(descr->hwdescr);
1141 }
1142 chain->head = descr;
1143
1144 spin_unlock_irqrestore(&chain->lock, flags);
1145}
1146
1147static int spider_net_resync_tail_ptr(struct spider_net_card *card)
1148{
1149 struct spider_net_descr_chain *chain = &card->rx_chain;
1150 struct spider_net_descr *descr;
1151 int i, status;
1152
1153 /* Advance tail pointer past any empty and reaped descrs */
1154 descr = chain->tail;
1155 status = spider_net_get_descr_status(descr->hwdescr);
1156
1157 for (i=0; i<chain->num_desc; i++) {
1158 if ((status != SPIDER_NET_DESCR_CARDOWNED) &&
1159 (status != SPIDER_NET_DESCR_NOT_IN_USE)) break;
1160 descr = descr->next;
1161 status = spider_net_get_descr_status(descr->hwdescr);
1162 }
1163 chain->tail = descr;
1164
1165 if ((i == chain->num_desc) || (i == 0))
1166 return 1;
1167 return 0;
1168}
1169
aaec0fab 1170/**
7376e732 1171 * spider_net_decode_one_descr - processes an RX descriptor
aaec0fab
JO		 1172 * @card: card structure
1173 *
7376e732 1174 * Returns 1 if a packet has been sent to the stack, otherwise 0.
aaec0fab 1175 *
7376e732
LV		 1176 * Processes an RX descriptor by iommu-unmapping the data buffer
1177 * and passing the packet up to the stack. This function is called
1178 * in softirq context, e.g. either bottom half from interrupt or
1179 * NAPI polling context.
aaec0fab
JO		 1180 */
1181static int
1cd173f6 1182spider_net_decode_one_descr(struct spider_net_card *card)
aaec0fab 1183{
09f75cd7 1184 struct net_device *dev = card->netdev;
bdd01503
JO		 1185 struct spider_net_descr_chain *chain = &card->rx_chain;
1186 struct spider_net_descr *descr = chain->tail;
4cb6f9e5 1187 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
9e0a6e25 1188 u32 hw_buf_addr;
bdd01503 1189 int status;
aaec0fab 1190
4cb6f9e5 1191 status = spider_net_get_descr_status(hwdescr);
aaec0fab 1192
80dab7c7
LV		 1193 /* Nothing in the descriptor, or ring must be empty */
1194 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1195 (status == SPIDER_NET_DESCR_NOT_IN_USE))
1cd173f6 1196 return 0;
aaec0fab 1197
11f1a52b 1198 /* descriptor definitively used -- move on tail */
aaec0fab
JO		 1199 chain->tail = descr->next;
1200
05b346b5 1201 /* unmap descriptor */
9e0a6e25
LV		 1202 hw_buf_addr = hwdescr->buf_addr;
1203 hwdescr->buf_addr = 0xffffffff;
1204 pci_unmap_single(card->pdev, hw_buf_addr,
05b346b5
LV		 1205 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1206
aaec0fab
JO		 1207 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1208 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1209 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1210 if (netif_msg_rx_err(card))
09f75cd7 1211 dev_err(&dev->dev,
e6311d85 1212 "dropping RX descriptor with state %d\n", status);
09f75cd7 1213 dev->stats.rx_dropped++;
7f7223b8 1214 goto bad_desc;
aaec0fab
JO		 1215 }
1216
1217 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1218 (status != SPIDER_NET_DESCR_FRAME_END) ) {
5a028877 1219 if (netif_msg_rx_err(card))
e6311d85
LV		 1220 dev_err(&card->netdev->dev,
1221 "RX descriptor with unknown state %d\n", status);
5a028877 1222 card->spider_stats.rx_desc_unk_state++;
7f7223b8 1223 goto bad_desc;
aaec0fab
JO		 1224 }
1225
366684bd 1226 /* The cases we'll throw away the packet immediately */
4cb6f9e5 1227 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
366684bd 1228 if (netif_msg_rx_err(card))
e6311d85
LV		 1229 dev_err(&card->netdev->dev,
1230 "error in received descriptor found, "
366684bd 1231 "data_status=x%08x, data_error=x%08x\n",
4cb6f9e5 1232 hwdescr->data_status, hwdescr->data_error);
7f7223b8 1233 goto bad_desc;
366684bd
LV		 1234 }
1235
e65bbf13 1236 if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) {
e6311d85 1237 dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n",
4cb6f9e5 1238 hwdescr->dmac_cmd_status);
9e0a6e25 1239 pr_err("buf_addr=x%08x\n", hw_buf_addr);
4cb6f9e5
LV		 1240 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1241 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1242 pr_err("result_size=x%08x\n", hwdescr->result_size);
1243 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1244 pr_err("data_status=x%08x\n", hwdescr->data_status);
1245 pr_err("data_error=x%08x\n", hwdescr->data_error);
6d24998f
LV		 1246 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1247
1248 card->spider_stats.rx_desc_error++;
1249 goto bad_desc;
1250 }
1251
7f7223b8
LV		 1252 /* Ok, we've got a packet in descr */
1253 spider_net_pass_skb_up(descr, card);
83d35145 1254 descr->skb = NULL;
4cb6f9e5 1255 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
7f7223b8
LV		 1256 return 1;
1257
1258bad_desc:
9948357d
LV		 1259 if (netif_msg_rx_err(card))
1260 show_rx_chain(card);
7f7223b8 1261 dev_kfree_skb_irq(descr->skb);
d9c199ee 1262 descr->skb = NULL;
4cb6f9e5 1263 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
7f7223b8 1264 return 0;
aaec0fab
JO		 1265}
1266
1267/**
1268 * spider_net_poll - NAPI poll function called by the stack to return packets
1269 * @netdev: interface device structure
1270 * @budget: number of packets we can pass to the stack at most
1271 *
1272 * returns 0 if no more packets available to the driver/stack. Returns 1,
1273 * if the quota is exceeded, but the driver has still packets.
1274 *
1275 * spider_net_poll returns all packets from the rx descriptors to the stack
1276 * (using netif_receive_skb). If all/enough packets are up, the driver
1277 * reenables interrupts and returns 0. If not, 1 is returned.
1278 */
bea3348e 1279static int spider_net_poll(struct napi_struct *napi, int budget)
aaec0fab 1280{
bea3348e
SH		 1281 struct spider_net_card *card = container_of(napi, struct spider_net_card, napi);
1282 struct net_device *netdev = card->netdev;
1283 int packets_done = 0;
1284
1285 while (packets_done < budget) {
1286 if (!spider_net_decode_one_descr(card))
aaec0fab 1287 break;
bea3348e
SH		 1288
1289 packets_done++;
aaec0fab
JO		 1290 }
1291
4c4bd5a9 1292 if ((packets_done == 0) && (card->num_rx_ints != 0)) {
bea3348e
SH		 1293 if (!spider_net_resync_tail_ptr(card))
1294 packets_done = budget;
4c4bd5a9
LV		 1295 spider_net_resync_head_ptr(card);
1296 }
1297 card->num_rx_ints = 0;
1298
11f1a52b 1299 spider_net_refill_rx_chain(card);
80dab7c7 1300 spider_net_enable_rxdmac(card);
aaec0fab 1301
e1fd9070
LV		 1302 spider_net_cleanup_tx_ring(card);
1303
aaec0fab
JO		 1304 /* if all packets are in the stack, enable interrupts and return 0 */
1305 /* if not, return 1 */
bea3348e
SH		 1306 if (packets_done < budget) {
1307 netif_rx_complete(netdev, napi);
aaec0fab 1308 spider_net_rx_irq_on(card);
c3d1182a 1309 card->ignore_rx_ramfull = 0;
aaec0fab
JO		 1310 }
1311
bea3348e 1312 return packets_done;
aaec0fab
JO		 1313}
1314
aaec0fab
JO		 1315/**
1316 * spider_net_change_mtu - changes the MTU of an interface
1317 * @netdev: interface device structure
1318 * @new_mtu: new MTU value
1319 *
1320 * returns 0 on success, <0 on failure
1321 */
1322static int
1323spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1324{
1325 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1326 * and mtu is outbound only anyway */
1327 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1328 (new_mtu > SPIDER_NET_MAX_MTU) )
1329 return -EINVAL;
1330 netdev->mtu = new_mtu;
1331 return 0;
1332}
1333
1334/**
1335 * spider_net_set_mac - sets the MAC of an interface
1336 * @netdev: interface device structure
1337 * @ptr: pointer to new MAC address
1338 *
1339 * Returns 0 on success, <0 on failure. Currently, we don't support this
1340 * and will always return EOPNOTSUPP.
1341 */
1342static int
1343spider_net_set_mac(struct net_device *netdev, void *p)
1344{
1345 struct spider_net_card *card = netdev_priv(netdev);
054034db 1346 u32 macl, macu, regvalue;
aaec0fab
JO		 1347 struct sockaddr *addr = p;
1348
aaec0fab
JO		 1349 if (!is_valid_ether_addr(addr->sa_data))
1350 return -EADDRNOTAVAIL;
1351
054034db
JO		 1352 /* switch off GMACTPE and GMACRPE */
1353 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1354 regvalue &= ~((1 << 5) | (1 << 6));
1355 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1356
1357 /* write mac */
aaec0fab
JO		 1358 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1359 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1360 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1361 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1362 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1363
054034db
JO		 1364 /* switch GMACTPE and GMACRPE back on */
1365 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1366 regvalue |= ((1 << 5) | (1 << 6));
1367 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1368
aaec0fab
JO		 1369 spider_net_set_promisc(card);
1370
1371 /* look up, whether we have been successful */
1372 if (spider_net_get_mac_address(netdev))
1373 return -EADDRNOTAVAIL;
1374 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1375 return -EADDRNOTAVAIL;
1376
1377 return 0;
1378}
1379
abdb66b5
KI		 1380/**
1381 * spider_net_link_reset
1382 * @netdev: net device structure
1383 *
1384 * This is called when the PHY_LINK signal is asserted. For the blade this is
1385 * not connected so we should never get here.
1386 *
1387 */
1388static void
1389spider_net_link_reset(struct net_device *netdev)
1390{
1391
1392 struct spider_net_card *card = netdev_priv(netdev);
1393
1394 del_timer_sync(&card->aneg_timer);
1395
1396 /* clear interrupt, block further interrupts */
1397 spider_net_write_reg(card, SPIDER_NET_GMACST,
1398 spider_net_read_reg(card, SPIDER_NET_GMACST));
1399 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1400
1401 /* reset phy and setup aneg */
81971bef
IK		 1402 card->aneg_count = 0;
1403 card->medium = BCM54XX_COPPER;
abdb66b5
KI		 1404 spider_net_setup_aneg(card);
1405 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1406
1407}
1408
aaec0fab
JO		 1409/**
1410 * spider_net_handle_error_irq - handles errors raised by an interrupt
1411 * @card: card structure
1412 * @status_reg: interrupt status register 0 (GHIINT0STS)
1413 *
1414 * spider_net_handle_error_irq treats or ignores all error conditions
1415 * found when an interrupt is presented
1416 */
1417static void
1418spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1419{
1420 u32 error_reg1, error_reg2;
1421 u32 i;
1422 int show_error = 1;
1423
1424 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1425 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
7a627558 1426
a041fe2e
IK		 1427 error_reg1 &= SPIDER_NET_INT1_MASK_VALUE;
1428 error_reg2 &= SPIDER_NET_INT2_MASK_VALUE;
aaec0fab
JO		 1429
1430 /* check GHIINT0STS ************************************/
1431 if (status_reg)
1432 for (i = 0; i < 32; i++)
1433 if (status_reg & (1<<i))
1434 switch (i)
1435 {
1436 /* let error_reg1 and error_reg2 evaluation decide, what to do
1437 case SPIDER_NET_PHYINT:
1438 case SPIDER_NET_GMAC2INT:
1439 case SPIDER_NET_GMAC1INT:
aaec0fab
JO		 1440 case SPIDER_NET_GFIFOINT:
1441 case SPIDER_NET_DMACINT:
1442 case SPIDER_NET_GSYSINT:
1443 break; */
1444
98b9040c
LV		 1445 case SPIDER_NET_GIPSINT:
1446 show_error = 0;
1447 break;
1448
aaec0fab
JO		 1449 case SPIDER_NET_GPWOPCMPINT:
1450 /* PHY write operation completed */
1451 show_error = 0;
1452 break;
1453 case SPIDER_NET_GPROPCMPINT:
1454 /* PHY read operation completed */
1455 /* we don't use semaphores, as we poll for the completion
1456 * of the read operation in spider_net_read_phy. Should take
1457 * about 50 us */
1458 show_error = 0;
1459 break;
1460 case SPIDER_NET_GPWFFINT:
1461 /* PHY command queue full */
1462 if (netif_msg_intr(card))
e6311d85 1463 dev_err(&card->netdev->dev, "PHY write queue full\n");
aaec0fab
JO		 1464 show_error = 0;
1465 break;
1466
1467 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1468 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1469 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1470
1471 case SPIDER_NET_GDTDEN0INT:
1472 /* someone has set TX_DMA_EN to 0 */
1473 show_error = 0;
1474 break;
1475
1476 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1477 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1478 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1479 case SPIDER_NET_GDADEN0INT:
1480 /* someone has set RX_DMA_EN to 0 */
1481 show_error = 0;
1482 break;
1483
1484 /* RX interrupts */
1485 case SPIDER_NET_GDDFDCINT:
1486 case SPIDER_NET_GDCFDCINT:
1487 case SPIDER_NET_GDBFDCINT:
1488 case SPIDER_NET_GDAFDCINT:
1489 /* case SPIDER_NET_GDNMINT: not used. print a message */
1490 /* case SPIDER_NET_GCNMINT: not used. print a message */
1491 /* case SPIDER_NET_GBNMINT: not used. print a message */
1492 /* case SPIDER_NET_GANMINT: not used. print a message */
1493 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1494 show_error = 0;
1495 break;
1496
1497 /* TX interrupts */
1498 case SPIDER_NET_GDTFDCINT:
1499 show_error = 0;
1500 break;
1501 case SPIDER_NET_GTTEDINT:
1502 show_error = 0;
1503 break;
1504 case SPIDER_NET_GDTDCEINT:
1505 /* chain end. If a descriptor should be sent, kick off
1506 * tx dma
98b9040c 1507 if (card->tx_chain.tail != card->tx_chain.head)
aaec0fab 1508 spider_net_kick_tx_dma(card);
98b9040c
LV		 1509 */
1510 show_error = 0;
aaec0fab
JO		 1511 break;
1512
1513 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1514 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1515 }
1516
1517 /* check GHIINT1STS ************************************/
1518 if (error_reg1)
1519 for (i = 0; i < 32; i++)
1520 if (error_reg1 & (1<<i))
1521 switch (i)
1522 {
1523 case SPIDER_NET_GTMFLLINT:
fc8e13da
IK		 1524 /* TX RAM full may happen on a usual case.
1525 * Logging is not needed. */
aaec0fab
JO		 1526 show_error = 0;
1527 break;
11f1a52b
AB		 1528 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1529 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1530 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1531 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
aaec0fab 1532 case SPIDER_NET_GRMFLLINT:
4c4bd5a9 1533 /* Could happen when rx chain is full */
c3d1182a
LV		 1534 if (card->ignore_rx_ramfull == 0) {
1535 card->ignore_rx_ramfull = 1;
1536 spider_net_resync_head_ptr(card);
1537 spider_net_refill_rx_chain(card);
1538 spider_net_enable_rxdmac(card);
1539 card->num_rx_ints ++;
bea3348e
SH		 1540 netif_rx_schedule(card->netdev,
1541 &card->napi);
c3d1182a 1542 }
11f1a52b 1543 show_error = 0;
aaec0fab
JO		 1544 break;
1545
1546 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1547 case SPIDER_NET_GDTINVDINT:
1548 /* allrighty. tx from previous descr ok */
1549 show_error = 0;
1550 break;
aaec0fab
JO		 1551
1552 /* chain end */
1553 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1554 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1555 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1556 case SPIDER_NET_GDADCEINT:
4c4bd5a9 1557 spider_net_resync_head_ptr(card);
aaec0fab 1558 spider_net_refill_rx_chain(card);
11f1a52b 1559 spider_net_enable_rxdmac(card);
4c4bd5a9 1560 card->num_rx_ints ++;
bea3348e
SH		 1561 netif_rx_schedule(card->netdev,
1562 &card->napi);
aaec0fab
JO		 1563 show_error = 0;
1564 break;
1565
1566 /* invalid descriptor */
1567 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1568 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1569 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1570 case SPIDER_NET_GDAINVDINT:
4c4bd5a9
LV		 1571 /* Could happen when rx chain is full */
1572 spider_net_resync_head_ptr(card);
aaec0fab 1573 spider_net_refill_rx_chain(card);
11f1a52b 1574 spider_net_enable_rxdmac(card);
4c4bd5a9 1575 card->num_rx_ints ++;
bea3348e
SH		 1576 netif_rx_schedule(card->netdev,
1577 &card->napi);
aaec0fab
JO		 1578 show_error = 0;
1579 break;
1580
1581 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1582 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1583 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1584 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1585 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1586 /* case SPIDER_NET_GDSERINT: problem, print a message */
1587 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1588 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1589 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1590 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1591 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1592 default:
1593 show_error = 1;
1594 break;
1595 }
1596
1597 /* check GHIINT2STS ************************************/
1598 if (error_reg2)
1599 for (i = 0; i < 32; i++)
1600 if (error_reg2 & (1<<i))
1601 switch (i)
1602 {
1603 /* there is nothing we can (want to) do at this time. Log a
1604 * message, we can switch on and off the specific values later on
1605 case SPIDER_NET_GPROPERINT:
1606 case SPIDER_NET_GMCTCRSNGINT:
1607 case SPIDER_NET_GMCTLCOLINT:
1608 case SPIDER_NET_GMCTTMOTINT:
1609 case SPIDER_NET_GMCRCAERINT:
1610 case SPIDER_NET_GMCRCALERINT:
1611 case SPIDER_NET_GMCRALNERINT:
1612 case SPIDER_NET_GMCROVRINT:
1613 case SPIDER_NET_GMCRRNTINT:
1614 case SPIDER_NET_GMCRRXERINT:
1615 case SPIDER_NET_GTITCSERINT:
1616 case SPIDER_NET_GTIFMTERINT:
1617 case SPIDER_NET_GTIPKTRVKINT:
1618 case SPIDER_NET_GTISPINGINT:
1619 case SPIDER_NET_GTISADNGINT:
1620 case SPIDER_NET_GTISPDNGINT:
1621 case SPIDER_NET_GRIFMTERINT:
1622 case SPIDER_NET_GRIPKTRVKINT:
1623 case SPIDER_NET_GRISPINGINT:
1624 case SPIDER_NET_GRISADNGINT:
1625 case SPIDER_NET_GRISPDNGINT:
1626 break;
1627 */
1628 default:
1629 break;
1630 }
1631
5a028877 1632 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
e6311d85 1633 dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, "
aaec0fab
JO		 1634 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1635 status_reg, error_reg1, error_reg2);
1636
1637 /* clear interrupt sources */
1638 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1639 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1640}
1641
1642/**
1643 * spider_net_interrupt - interrupt handler for spider_net
3a4fa0a2 1644 * @irq: interrupt number
aaec0fab
JO		 1645 * @ptr: pointer to net_device
1646 * @regs: PU registers
1647 *
1648 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1649 * interrupt found raised by card.
1650 *
1651 * This is the interrupt handler, that turns off
1652 * interrupts for this device and makes the stack poll the driver
1653 */
1654static irqreturn_t
7d12e780 1655spider_net_interrupt(int irq, void *ptr)
aaec0fab
JO		 1656{
1657 struct net_device *netdev = ptr;
1658 struct spider_net_card *card = netdev_priv(netdev);
a041fe2e 1659 u32 status_reg;
aaec0fab
JO		 1660
1661 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
a041fe2e 1662 status_reg &= SPIDER_NET_INT0_MASK_VALUE;
aaec0fab
JO		 1663
1664 if (!status_reg)
1665 return IRQ_NONE;
1666
aaec0fab
JO		 1667 if (status_reg & SPIDER_NET_RXINT ) {
1668 spider_net_rx_irq_off(card);
bea3348e 1669 netif_rx_schedule(netdev, &card->napi);
4c4bd5a9 1670 card->num_rx_ints ++;
aaec0fab 1671 }
68a8c609 1672 if (status_reg & SPIDER_NET_TXINT)
bea3348e 1673 netif_rx_schedule(netdev, &card->napi);
aaec0fab 1674
abdb66b5
KI		 1675 if (status_reg & SPIDER_NET_LINKINT)
1676 spider_net_link_reset(netdev);
1677
11f1a52b
AB		 1678 if (status_reg & SPIDER_NET_ERRINT )
1679 spider_net_handle_error_irq(card, status_reg);
aaec0fab
JO		 1680
1681 /* clear interrupt sources */
1682 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1683
1684 return IRQ_HANDLED;
1685}
1686
1687#ifdef CONFIG_NET_POLL_CONTROLLER
1688/**
1689 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1690 * @netdev: interface device structure
1691 *
1692 * see Documentation/networking/netconsole.txt
1693 */
1694static void
1695spider_net_poll_controller(struct net_device *netdev)
1696{
1697 disable_irq(netdev->irq);
7d12e780 1698 spider_net_interrupt(netdev->irq, netdev);
aaec0fab
JO		 1699 enable_irq(netdev->irq);
1700}
1701#endif /* CONFIG_NET_POLL_CONTROLLER */
1702
7a627558
IK		 1703/**
1704 * spider_net_enable_interrupts - enable interrupts
1705 * @card: card structure
1706 *
1707 * spider_net_enable_interrupt enables several interrupts
1708 */
1709static void
1710spider_net_enable_interrupts(struct spider_net_card *card)
1711{
1712 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1713 SPIDER_NET_INT0_MASK_VALUE);
1714 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1715 SPIDER_NET_INT1_MASK_VALUE);
1716 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1717 SPIDER_NET_INT2_MASK_VALUE);
1718}
1719
1720/**
1721 * spider_net_disable_interrupts - disable interrupts
1722 * @card: card structure
1723 *
1724 * spider_net_disable_interrupts disables all the interrupts
1725 */
1726static void
1727spider_net_disable_interrupts(struct spider_net_card *card)
1728{
1729 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1730 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1731 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1732 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1733}
1734
aaec0fab
JO		 1735/**
1736 * spider_net_init_card - initializes the card
1737 * @card: card structure
1738 *
1739 * spider_net_init_card initializes the card so that other registers can
1740 * be used
1741 */
1742static void
1743spider_net_init_card(struct spider_net_card *card)
1744{
1745 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1746 SPIDER_NET_CKRCTRL_STOP_VALUE);
1747
1748 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1749 SPIDER_NET_CKRCTRL_RUN_VALUE);
3342cf0e
KI		 1750
1751 /* trigger ETOMOD signal */
1752 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1753 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1754
7a627558 1755 spider_net_disable_interrupts(card);
aaec0fab
JO		 1756}
1757
1758/**
1759 * spider_net_enable_card - enables the card by setting all kinds of regs
1760 * @card: card structure
1761 *
1762 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1763 */
1764static void
1765spider_net_enable_card(struct spider_net_card *card)
1766{
1767 int i;
1768 /* the following array consists of (register),(value) pairs
1769 * that are set in this function. A register of 0 ends the list */
1770 u32 regs[][2] = {
1771 { SPIDER_NET_GRESUMINTNUM, 0 },
1772 { SPIDER_NET_GREINTNUM, 0 },
1773
1774 /* set interrupt frame number registers */
1775 /* clear the single DMA engine registers first */
1776 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1777 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1778 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1779 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1780 /* then set, what we really need */
1781 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1782
1783 /* timer counter registers and stuff */
1784 { SPIDER_NET_GFREECNNUM, 0 },
1785 { SPIDER_NET_GONETIMENUM, 0 },
1786 { SPIDER_NET_GTOUTFRMNUM, 0 },
1787
1788 /* RX mode setting */
1789 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1790 /* TX mode setting */
1791 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1792 /* IPSEC mode setting */
1793 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1794
1795 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1796
1797 { SPIDER_NET_GMRWOLCTRL, 0 },
b636d17a
JO		 1798 { SPIDER_NET_GTESTMD, 0x10000000 },
1799 { SPIDER_NET_GTTQMSK, 0x00400040 },
aaec0fab
JO		 1800
1801 { SPIDER_NET_GMACINTEN, 0 },
1802
1803 /* flow control stuff */
1804 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1805 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1806
1807 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1808 { 0, 0}
1809 };
1810
1811 i = 0;
1812 while (regs[i][0]) {
1813 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1814 i++;
1815 }
1816
1817 /* clear unicast filter table entries 1 to 14 */
1818 for (i = 1; i <= 14; i++) {
1819 spider_net_write_reg(card,
1820 SPIDER_NET_GMRUAFILnR + i * 8,
1821 0x00080000);
1822 spider_net_write_reg(card,
1823 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1824 0x00000000);
1825 }
1826
1827 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1828
1829 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1830
1831 /* set chain tail adress for RX chains and
1832 * enable DMA */
1833 spider_net_enable_rxchtails(card);
1834 spider_net_enable_rxdmac(card);
1835
1836 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1837
aaec0fab
JO		 1838 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1839 SPIDER_NET_LENLMT_VALUE);
aaec0fab
JO		 1840 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1841 SPIDER_NET_OPMODE_VALUE);
1842
bdd01503 1843 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
7bd54c86 1844 SPIDER_NET_GDTBSTA);
aaec0fab
JO		 1845}
1846
3cf761dd
KI		 1847/**
1848 * spider_net_download_firmware - loads firmware into the adapter
1849 * @card: card structure
1850 * @firmware_ptr: pointer to firmware data
1851 *
1852 * spider_net_download_firmware loads the firmware data into the
1853 * adapter. It assumes the length etc. to be allright.
1854 */
1855static int
1856spider_net_download_firmware(struct spider_net_card *card,
1857 const void *firmware_ptr)
1858{
1859 int sequencer, i;
1860 const u32 *fw_ptr = firmware_ptr;
1861
1862 /* stop sequencers */
1863 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1864 SPIDER_NET_STOP_SEQ_VALUE);
1865
1866 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1867 sequencer++) {
1868 spider_net_write_reg(card,
1869 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1870 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
1871 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1872 sequencer * 8, *fw_ptr);
1873 fw_ptr++;
1874 }
1875 }
1876
1877 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1878 return -EIO;
1879
1880 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1881 SPIDER_NET_RUN_SEQ_VALUE);
1882
1883 return 0;
1884}
1885
1886/**
1887 * spider_net_init_firmware - reads in firmware parts
1888 * @card: card structure
1889 *
1890 * Returns 0 on success, <0 on failure
1891 *
1892 * spider_net_init_firmware opens the sequencer firmware and does some basic
1893 * checks. This function opens and releases the firmware structure. A call
1894 * to download the firmware is performed before the release.
1895 *
1896 * Firmware format
1897 * ===============
1898 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1899 * the program for each sequencer. Use the command
1900 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1901 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1902 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1903 *
1904 * to generate spider_fw.bin, if you have sequencer programs with something
1905 * like the following contents for each sequencer:
1906 * <ONE LINE COMMENT>
1907 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1908 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1909 * ...
1910 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1911 */
1912static int
1913spider_net_init_firmware(struct spider_net_card *card)
1914{
1915 struct firmware *firmware = NULL;
1916 struct device_node *dn;
1917 const u8 *fw_prop = NULL;
1918 int err = -ENOENT;
1919 int fw_size;
1920
1921 if (request_firmware((const struct firmware **)&firmware,
1922 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1923 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1924 netif_msg_probe(card) ) {
e6311d85
LV		 1925 dev_err(&card->netdev->dev,
1926 "Incorrect size of spidernet firmware in " \
3cf761dd
KI		 1927 "filesystem. Looking in host firmware...\n");
1928 goto try_host_fw;
1929 }
1930 err = spider_net_download_firmware(card, firmware->data);
1931
1932 release_firmware(firmware);
1933 if (err)
1934 goto try_host_fw;
1935
1936 goto done;
1937 }
1938
1939try_host_fw:
1940 dn = pci_device_to_OF_node(card->pdev);
1941 if (!dn)
1942 goto out_err;
1943
40cd3a45 1944 fw_prop = of_get_property(dn, "firmware", &fw_size);
3cf761dd
KI		 1945 if (!fw_prop)
1946 goto out_err;
1947
1948 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1949 netif_msg_probe(card) ) {
e6311d85
LV		 1950 dev_err(&card->netdev->dev,
1951 "Incorrect size of spidernet firmware in host firmware\n");
3cf761dd
KI		 1952 goto done;
1953 }
1954
1955 err = spider_net_download_firmware(card, fw_prop);
1956
1957done:
1958 return err;
1959out_err:
1960 if (netif_msg_probe(card))
e6311d85
LV		 1961 dev_err(&card->netdev->dev,
1962 "Couldn't find spidernet firmware in filesystem " \
3cf761dd
KI		 1963 "or host firmware\n");
1964 return err;
1965}
1966
aaec0fab
JO		 1967/**
1968 * spider_net_open - called upon ifonfig up
1969 * @netdev: interface device structure
1970 *
1971 * returns 0 on success, <0 on failure
1972 *
1973 * spider_net_open allocates all the descriptors and memory needed for
1974 * operation, sets up multicast list and enables interrupts
1975 */
1976int
1977spider_net_open(struct net_device *netdev)
1978{
1979 struct spider_net_card *card = netdev_priv(netdev);
d4ed8f8d 1980 int result;
aaec0fab 1981
3cf761dd
KI		 1982 result = spider_net_init_firmware(card);
1983 if (result)
1984 goto init_firmware_failed;
1985
abdb66b5 1986 /* start probing with copper */
81971bef
IK		 1987 card->aneg_count = 0;
1988 card->medium = BCM54XX_COPPER;
abdb66b5
KI		 1989 spider_net_setup_aneg(card);
1990 if (card->phy.def->phy_id)
1991 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1992
d4ed8f8d
LV		 1993 result = spider_net_init_chain(card, &card->tx_chain);
1994 if (result)
aaec0fab 1995 goto alloc_tx_failed;
204e5fa1
LV		 1996 card->low_watermark = NULL;
1997
d4ed8f8d
LV		 1998 result = spider_net_init_chain(card, &card->rx_chain);
1999 if (result)
aaec0fab
JO		 2000 goto alloc_rx_failed;
2001
d4ed8f8d 2002 /* Allocate rx skbs */
aaec0fab
JO		 2003 if (spider_net_alloc_rx_skbs(card))
2004 goto alloc_skbs_failed;
2005
2006 spider_net_set_multi(netdev);
2007
2008 /* further enhancement: setup hw vlan, if needed */
2009
2010 result = -EBUSY;
2011 if (request_irq(netdev->irq, spider_net_interrupt,
1fb9df5d 2012 IRQF_SHARED, netdev->name, netdev))
aaec0fab
JO		 2013 goto register_int_failed;
2014
2015 spider_net_enable_card(card);
2016
543cec51
JO		 2017 netif_start_queue(netdev);
2018 netif_carrier_on(netdev);
bea3348e 2019 napi_enable(&card->napi);
543cec51 2020
7a627558
IK		 2021 spider_net_enable_interrupts(card);
2022
aaec0fab
JO		 2023 return 0;
2024
2025register_int_failed:
2026 spider_net_free_rx_chain_contents(card);
2027alloc_skbs_failed:
2028 spider_net_free_chain(card, &card->rx_chain);
2029alloc_rx_failed:
2030 spider_net_free_chain(card, &card->tx_chain);
2031alloc_tx_failed:
abdb66b5 2032 del_timer_sync(&card->aneg_timer);
3cf761dd 2033init_firmware_failed:
aaec0fab
JO		 2034 return result;
2035}
2036
abdb66b5
KI		 2037/**
2038 * spider_net_link_phy
2039 * @data: used for pointer to card structure
2040 *
2041 */
2042static void spider_net_link_phy(unsigned long data)
2043{
2044 struct spider_net_card *card = (struct spider_net_card *)data;
2045 struct mii_phy *phy = &card->phy;
2046
2047 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
2048 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
2049
2050 pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
2051
4b23a554
JO		 2052 switch (card->medium) {
2053 case BCM54XX_COPPER:
abdb66b5
KI		 2054 /* enable fiber with autonegotiation first */
2055 if (phy->def->ops->enable_fiber)
2056 phy->def->ops->enable_fiber(phy, 1);
4b23a554 2057 card->medium = BCM54XX_FIBER;
abdb66b5
KI		 2058 break;
2059
4b23a554 2060 case BCM54XX_FIBER:
abdb66b5
KI		 2061 /* fiber didn't come up, try to disable fiber autoneg */
2062 if (phy->def->ops->enable_fiber)
2063 phy->def->ops->enable_fiber(phy, 0);
4b23a554 2064 card->medium = BCM54XX_UNKNOWN;
abdb66b5
KI		 2065 break;
2066
4b23a554 2067 case BCM54XX_UNKNOWN:
abdb66b5
KI		 2068 /* copper, fiber with and without failed,
2069 * retry from beginning */
2070 spider_net_setup_aneg(card);
4b23a554 2071 card->medium = BCM54XX_COPPER;
abdb66b5
KI		 2072 break;
2073 }
2074
2075 card->aneg_count = 0;
2076 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2077 return;
2078 }
2079
2080 /* link still not up, try again later */
2081 if (!(phy->def->ops->poll_link(phy))) {
2082 card->aneg_count++;
2083 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
2084 return;
2085 }
2086
2087 /* link came up, get abilities */
2088 phy->def->ops->read_link(phy);
2089
2090 spider_net_write_reg(card, SPIDER_NET_GMACST,
2091 spider_net_read_reg(card, SPIDER_NET_GMACST));
2092 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
2093
2094 if (phy->speed == 1000)
2095 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
2096 else
2097 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
2098
2099 card->aneg_count = 0;
2100
2101 pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
2102 phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
2103 phy->autoneg==1 ? "" : "no ");
2104
2105 return;
2106}
2107
aaec0fab
JO		 2108/**
2109 * spider_net_setup_phy - setup PHY
2110 * @card: card structure
2111 *
2112 * returns 0 on success, <0 on failure
2113 *
abdb66b5 2114 * spider_net_setup_phy is used as part of spider_net_probe.
aaec0fab
JO		 2115 **/
2116static int
2117spider_net_setup_phy(struct spider_net_card *card)
2118{
2119 struct mii_phy *phy = &card->phy;
2120
2121 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
2122 SPIDER_NET_DMASEL_VALUE);
2123 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
2124 SPIDER_NET_PHY_CTRL_VALUE);
abdb66b5 2125
aaec0fab
JO		 2126 phy->dev = card->netdev;
2127 phy->mdio_read = spider_net_read_phy;
2128 phy->mdio_write = spider_net_write_phy;
2129
abdb66b5
KI		 2130 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
2131 unsigned short id;
2132 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
2133 if (id != 0x0000 && id != 0xffff) {
2134 if (!mii_phy_probe(phy, phy->mii_id)) {
2135 pr_info("Found %s.\n", phy->def->name);
2136 break;
2137 }
2138 }
2139 }
aaec0fab
JO		 2140
2141 return 0;
2142}
2143
aaec0fab
JO		 2144/**
2145 * spider_net_workaround_rxramfull - work around firmware bug
2146 * @card: card structure
2147 *
2148 * no return value
2149 **/
2150static void
2151spider_net_workaround_rxramfull(struct spider_net_card *card)
2152{
2153 int i, sequencer = 0;
2154
2155 /* cancel reset */
2156 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2157 SPIDER_NET_CKRCTRL_RUN_VALUE);
2158
2159 /* empty sequencer data */
11f1a52b
AB		 2160 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2161 sequencer++) {
ee962a5c 2162 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
aaec0fab 2163 sequencer * 8, 0x0);
11f1a52b 2164 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
aaec0fab
JO		 2165 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2166 sequencer * 8, 0x0);
2167 }
2168 }
2169
2170 /* set sequencer operation */
2171 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2172
2173 /* reset */
2174 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2175 SPIDER_NET_CKRCTRL_STOP_VALUE);
2176}
2177
bdd01503
JO		 2178/**
2179 * spider_net_stop - called upon ifconfig down
2180 * @netdev: interface device structure
2181 *
2182 * always returns 0
2183 */
2184int
2185spider_net_stop(struct net_device *netdev)
2186{
2187 struct spider_net_card *card = netdev_priv(netdev);
2188
bea3348e 2189 napi_disable(&card->napi);
bdd01503
JO		 2190 netif_carrier_off(netdev);
2191 netif_stop_queue(netdev);
2192 del_timer_sync(&card->tx_timer);
abdb66b5 2193 del_timer_sync(&card->aneg_timer);
bdd01503 2194
7a627558 2195 spider_net_disable_interrupts(card);
bdd01503 2196
d406eafe 2197 free_irq(netdev->irq, netdev);
bdd01503
JO		 2198
2199 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2200 SPIDER_NET_DMA_TX_FEND_VALUE);
2201
2202 /* turn off DMA, force end */
2203 spider_net_disable_rxdmac(card);
2204
2205 /* release chains */
9cc7bf7e 2206 spider_net_release_tx_chain(card, 1);
d4ed8f8d 2207 spider_net_free_rx_chain_contents(card);
bdd01503
JO		 2208
2209 spider_net_free_chain(card, &card->tx_chain);
2210 spider_net_free_chain(card, &card->rx_chain);
2211
2212 return 0;
2213}
2214
aaec0fab
JO		 2215/**
2216 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2217 * function (to be called not under interrupt status)
2218 * @data: data, is interface device structure
2219 *
2220 * called as task when tx hangs, resets interface (if interface is up)
2221 */
2222static void
c4028958 2223spider_net_tx_timeout_task(struct work_struct *work)
aaec0fab 2224{
c4028958
DH		 2225 struct spider_net_card *card =
2226 container_of(work, struct spider_net_card, tx_timeout_task);
2227 struct net_device *netdev = card->netdev;
aaec0fab
JO		 2228
2229 if (!(netdev->flags & IFF_UP))
2230 goto out;
2231
2232 netif_device_detach(netdev);
2233 spider_net_stop(netdev);
2234
2235 spider_net_workaround_rxramfull(card);
2236 spider_net_init_card(card);
2237
2238 if (spider_net_setup_phy(card))
2239 goto out;
aaec0fab
JO		 2240
2241 spider_net_open(netdev);
bdd01503 2242 spider_net_kick_tx_dma(card);
aaec0fab
JO		 2243 netif_device_attach(netdev);
2244
2245out:
2246 atomic_dec(&card->tx_timeout_task_counter);
2247}
2248
2249/**
2250 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2251 * @netdev: interface device structure
2252 *
2253 * called, if tx hangs. Schedules a task that resets the interface
2254 */
2255static void
2256spider_net_tx_timeout(struct net_device *netdev)
2257{
2258 struct spider_net_card *card;
2259
2260 card = netdev_priv(netdev);
2261 atomic_inc(&card->tx_timeout_task_counter);
2262 if (netdev->flags & IFF_UP)
2263 schedule_work(&card->tx_timeout_task);
2264 else
2265 atomic_dec(&card->tx_timeout_task_counter);
9b6b0b81 2266 card->spider_stats.tx_timeouts++;
aaec0fab
JO		 2267}
2268
2269/**
2270 * spider_net_setup_netdev_ops - initialization of net_device operations
2271 * @netdev: net_device structure
2272 *
2273 * fills out function pointers in the net_device structure
2274 */
2275static void
2276spider_net_setup_netdev_ops(struct net_device *netdev)
2277{
2278 netdev->open = &spider_net_open;
2279 netdev->stop = &spider_net_stop;
2280 netdev->hard_start_xmit = &spider_net_xmit;
aaec0fab
JO		 2281 netdev->set_multicast_list = &spider_net_set_multi;
2282 netdev->set_mac_address = &spider_net_set_mac;
2283 netdev->change_mtu = &spider_net_change_mtu;
2284 netdev->do_ioctl = &spider_net_do_ioctl;
2285 /* tx watchdog */
2286 netdev->tx_timeout = &spider_net_tx_timeout;
2287 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
aaec0fab 2288 /* HW VLAN */
aaec0fab
JO		 2289#ifdef CONFIG_NET_POLL_CONTROLLER
2290 /* poll controller */
2291 netdev->poll_controller = &spider_net_poll_controller;
2292#endif /* CONFIG_NET_POLL_CONTROLLER */
2293 /* ethtool ops */
2294 netdev->ethtool_ops = &spider_net_ethtool_ops;
2295}
2296
2297/**
2298 * spider_net_setup_netdev - initialization of net_device
2299 * @card: card structure
2300 *
2301 * Returns 0 on success or <0 on failure
2302 *
2303 * spider_net_setup_netdev initializes the net_device structure
2304 **/
2305static int
2306spider_net_setup_netdev(struct spider_net_card *card)
2307{
2308 int result;
2309 struct net_device *netdev = card->netdev;
2310 struct device_node *dn;
2311 struct sockaddr addr;
1a2509c9 2312 const u8 *mac;
aaec0fab 2313
aaec0fab
JO		 2314 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2315
2316 pci_set_drvdata(card->pdev, netdev);
11f1a52b 2317
11f1a52b
AB		 2318 init_timer(&card->tx_timer);
2319 card->tx_timer.function =
2320 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2321 card->tx_timer.data = (unsigned long) card;
aaec0fab
JO		 2322 netdev->irq = card->pdev->irq;
2323
abdb66b5
KI		 2324 card->aneg_count = 0;
2325 init_timer(&card->aneg_timer);
2326 card->aneg_timer.function = spider_net_link_phy;
2327 card->aneg_timer.data = (unsigned long) card;
2328
aaec0fab
JO		 2329 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2330
bea3348e
SH		 2331 netif_napi_add(netdev, &card->napi,
2332 spider_net_poll, SPIDER_NET_NAPI_WEIGHT);
2333
aaec0fab
JO		 2334 spider_net_setup_netdev_ops(netdev);
2335
3a2c892d 2336 netdev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX;
aaec0fab
JO		 2337 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2338 * NETIF_F_HW_VLAN_FILTER */
2339
2340 netdev->irq = card->pdev->irq;
4c4bd5a9 2341 card->num_rx_ints = 0;
c3d1182a 2342 card->ignore_rx_ramfull = 0;
aaec0fab
JO		 2343
2344 dn = pci_device_to_OF_node(card->pdev);
543cec51
JO		 2345 if (!dn)
2346 return -EIO;
2347
40cd3a45 2348 mac = of_get_property(dn, "local-mac-address", NULL);
543cec51
JO		 2349 if (!mac)
2350 return -EIO;
aaec0fab
JO		 2351 memcpy(addr.sa_data, mac, ETH_ALEN);
2352
2353 result = spider_net_set_mac(netdev, &addr);
2354 if ((result) && (netif_msg_probe(card)))
e6311d85
LV		 2355 dev_err(&card->netdev->dev,
2356 "Failed to set MAC address: %i\n", result);
aaec0fab
JO		 2357
2358 result = register_netdev(netdev);
2359 if (result) {
2360 if (netif_msg_probe(card))
e6311d85
LV		 2361 dev_err(&card->netdev->dev,
2362 "Couldn't register net_device: %i\n", result);
aaec0fab
JO		 2363 return result;
2364 }
2365
2366 if (netif_msg_probe(card))
2367 pr_info("Initialized device %s.\n", netdev->name);
2368
2369 return 0;
2370}
2371
2372/**
2373 * spider_net_alloc_card - allocates net_device and card structure
2374 *
2375 * returns the card structure or NULL in case of errors
2376 *
2377 * the card and net_device structures are linked to each other
2378 */
2379static struct spider_net_card *
2380spider_net_alloc_card(void)
2381{
2382 struct net_device *netdev;
2383 struct spider_net_card *card;
4cb6f9e5 2384 size_t alloc_size;
aaec0fab 2385
4cb6f9e5
LV		 2386 alloc_size = sizeof(struct spider_net_card) +
2387 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2388 netdev = alloc_etherdev(alloc_size);
aaec0fab
JO		 2389 if (!netdev)
2390 return NULL;
2391
2392 card = netdev_priv(netdev);
2393 card->netdev = netdev;
2394 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
c4028958 2395 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
aaec0fab
JO		 2396 init_waitqueue_head(&card->waitq);
2397 atomic_set(&card->tx_timeout_task_counter, 0);
2398
4cb6f9e5
LV		 2399 card->rx_chain.num_desc = rx_descriptors;
2400 card->rx_chain.ring = card->darray;
2401 card->tx_chain.num_desc = tx_descriptors;
2402 card->tx_chain.ring = card->darray + rx_descriptors;
2403
aaec0fab
JO		 2404 return card;
2405}
2406
2407/**
2408 * spider_net_undo_pci_setup - releases PCI ressources
2409 * @card: card structure
2410 *
2411 * spider_net_undo_pci_setup releases the mapped regions
2412 */
2413static void
2414spider_net_undo_pci_setup(struct spider_net_card *card)
2415{
2416 iounmap(card->regs);
2417 pci_release_regions(card->pdev);
2418}
2419
2420/**
2421 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2422 * @card: card structure
2423 * @pdev: PCI device
2424 *
2425 * Returns the card structure or NULL if any errors occur
2426 *
2427 * spider_net_setup_pci_dev initializes pdev and together with the
2428 * functions called in spider_net_open configures the device so that
2429 * data can be transferred over it
2430 * The net_device structure is attached to the card structure, if the
2431 * function returns without error.
2432 **/
2433static struct spider_net_card *
2434spider_net_setup_pci_dev(struct pci_dev *pdev)
2435{
2436 struct spider_net_card *card;
2437 unsigned long mmio_start, mmio_len;
2438
2439 if (pci_enable_device(pdev)) {
e6311d85 2440 dev_err(&pdev->dev, "Couldn't enable PCI device\n");
aaec0fab
JO		 2441 return NULL;
2442 }
2443
2444 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
e6311d85
LV		 2445 dev_err(&pdev->dev,
2446 "Couldn't find proper PCI device base address.\n");
aaec0fab
JO		 2447 goto out_disable_dev;
2448 }
2449
2450 if (pci_request_regions(pdev, spider_net_driver_name)) {
e6311d85
LV		 2451 dev_err(&pdev->dev,
2452 "Couldn't obtain PCI resources, aborting.\n");
aaec0fab
JO		 2453 goto out_disable_dev;
2454 }
2455
2456 pci_set_master(pdev);
2457
2458 card = spider_net_alloc_card();
2459 if (!card) {
e6311d85
LV		 2460 dev_err(&pdev->dev,
2461 "Couldn't allocate net_device structure, aborting.\n");
aaec0fab
JO		 2462 goto out_release_regions;
2463 }
2464 card->pdev = pdev;
2465
2466 /* fetch base address and length of first resource */
2467 mmio_start = pci_resource_start(pdev, 0);
2468 mmio_len = pci_resource_len(pdev, 0);
2469
2470 card->netdev->mem_start = mmio_start;
2471 card->netdev->mem_end = mmio_start + mmio_len;
2472 card->regs = ioremap(mmio_start, mmio_len);
2473
2474 if (!card->regs) {
e6311d85
LV		 2475 dev_err(&pdev->dev,
2476 "Couldn't obtain PCI resources, aborting.\n");
aaec0fab
JO		 2477 goto out_release_regions;
2478 }
2479
2480 return card;
2481
2482out_release_regions:
2483 pci_release_regions(pdev);
2484out_disable_dev:
2485 pci_disable_device(pdev);
2486 pci_set_drvdata(pdev, NULL);
2487 return NULL;
2488}
2489
2490/**
2491 * spider_net_probe - initialization of a device
2492 * @pdev: PCI device
2493 * @ent: entry in the device id list
2494 *
2495 * Returns 0 on success, <0 on failure
2496 *
2497 * spider_net_probe initializes pdev and registers a net_device
2498 * structure for it. After that, the device can be ifconfig'ed up
2499 **/
2500static int __devinit
2501spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2502{
2503 int err = -EIO;
2504 struct spider_net_card *card;
2505
2506 card = spider_net_setup_pci_dev(pdev);
2507 if (!card)
2508 goto out;
2509
2510 spider_net_workaround_rxramfull(card);
2511 spider_net_init_card(card);
2512
2513 err = spider_net_setup_phy(card);
2514 if (err)
2515 goto out_undo_pci;
2516
aaec0fab
JO		 2517 err = spider_net_setup_netdev(card);
2518 if (err)
2519 goto out_undo_pci;
2520
2521 return 0;
2522
2523out_undo_pci:
2524 spider_net_undo_pci_setup(card);
2525 free_netdev(card->netdev);
2526out:
2527 return err;
2528}
2529
2530/**
2531 * spider_net_remove - removal of a device
2532 * @pdev: PCI device
2533 *
2534 * Returns 0 on success, <0 on failure
2535 *
2536 * spider_net_remove is called to remove the device and unregisters the
2537 * net_device
2538 **/
2539static void __devexit
2540spider_net_remove(struct pci_dev *pdev)
2541{
2542 struct net_device *netdev;
2543 struct spider_net_card *card;
2544
2545 netdev = pci_get_drvdata(pdev);
2546 card = netdev_priv(netdev);
2547
2548 wait_event(card->waitq,
2549 atomic_read(&card->tx_timeout_task_counter) == 0);
2550
2551 unregister_netdev(netdev);
543cec51
JO		 2552
2553 /* switch off card */
2554 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2555 SPIDER_NET_CKRCTRL_STOP_VALUE);
2556 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2557 SPIDER_NET_CKRCTRL_RUN_VALUE);
2558
aaec0fab
JO		 2559 spider_net_undo_pci_setup(card);
2560 free_netdev(netdev);
aaec0fab
JO		 2561}
2562
2563static struct pci_driver spider_net_driver = {
aaec0fab
JO		 2564 .name = spider_net_driver_name,
2565 .id_table = spider_net_pci_tbl,
2566 .probe = spider_net_probe,
2567 .remove = __devexit_p(spider_net_remove)
2568};
2569
2570/**
2571 * spider_net_init - init function when the driver is loaded
2572 *
2573 * spider_net_init registers the device driver
2574 */
2575static int __init spider_net_init(void)
2576{
90f10841
LV		 2577 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2578
aaec0fab
JO		 2579 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2580 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2581 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2582 }
2583 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2584 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2585 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2586 }
2587 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2588 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2589 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2590 }
2591 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2592 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2593 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2594 }
2595
2596 return pci_register_driver(&spider_net_driver);
2597}
2598
2599/**
2600 * spider_net_cleanup - exit function when driver is unloaded
2601 *
2602 * spider_net_cleanup unregisters the device driver
2603 */
2604static void __exit spider_net_cleanup(void)
2605{
2606 pci_unregister_driver(&spider_net_driver);
2607}
2608
2609module_init(spider_net_init);
2610module_exit(spider_net_cleanup);
Clone of davem's net-next-2.6 tree