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-rw-r--r--drivers/net/spider_net.c2298
1 files changed, 2298 insertions, 0 deletions
diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
new file mode 100644
index 000000000000..692a0437fef7
--- /dev/null
+++ b/drivers/net/spider_net.c
@@ -0,0 +1,2298 @@
1/*
2 * Network device driver for Cell Processor-Based Blade
3 *
4 * (C) Copyright IBM Corp. 2005
5 *
6 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
7 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include <linux/config.h>
25
26#include <linux/compiler.h>
27#include <linux/crc32.h>
28#include <linux/delay.h>
29#include <linux/etherdevice.h>
30#include <linux/ethtool.h>
31#include <linux/firmware.h>
32#include <linux/if_vlan.h>
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>
46#include <linux/wait.h>
47#include <linux/workqueue.h>
48#include <asm/bitops.h>
49#include <asm/pci-bridge.h>
50#include <net/checksum.h>
51
52#include "spider_net.h"
53
54MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
55 "<Jens.Osterkamp@de.ibm.com>");
56MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
57MODULE_LICENSE("GPL");
58
59static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
60static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
61
62module_param(rx_descriptors, int, 0644);
63module_param(tx_descriptors, int, 0644);
64
65MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
66 "in rx chains");
67MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
68 "in tx chain");
69
70char spider_net_driver_name[] = "spidernet";
71
72static struct pci_device_id spider_net_pci_tbl[] = {
73 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
74 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
75 { 0, }
76};
77
78MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
79
80/**
81 * spider_net_read_reg - reads an SMMIO register of a card
82 * @card: device structure
83 * @reg: register to read from
84 *
85 * returns the content of the specified SMMIO register.
86 */
87static u32
88spider_net_read_reg(struct spider_net_card *card, u32 reg)
89{
90 u32 value;
91
92 value = readl(card->regs + reg);
93 value = le32_to_cpu(value);
94
95 return value;
96}
97
98/**
99 * spider_net_write_reg - writes to an SMMIO register of a card
100 * @card: device structure
101 * @reg: register to write to
102 * @value: value to write into the specified SMMIO register
103 */
104static void
105spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
106{
107 value = cpu_to_le32(value);
108 writel(value, card->regs + reg);
109}
110
111/**
112 * spider_net_rx_irq_off - switch off rx irq on this spider card
113 * @card: device structure
114 *
115 * switches off rx irq by masking them out in the GHIINTnMSK register
116 */
117static void
118spider_net_rx_irq_off(struct spider_net_card *card)
119{
120 u32 regvalue;
121 unsigned long flags;
122
123 spin_lock_irqsave(&card->intmask_lock, flags);
124 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
125 regvalue &= ~SPIDER_NET_RXINT;
126 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
127 spin_unlock_irqrestore(&card->intmask_lock, flags);
128}
129
130/** spider_net_write_phy - write to phy register
131 * @netdev: adapter to be written to
132 * @mii_id: id of MII
133 * @reg: PHY register
134 * @val: value to be written to phy register
135 *
136 * spider_net_write_phy_register writes to an arbitrary PHY
137 * register via the spider GPCWOPCMD register. We assume the queue does
138 * not run full (not more than 15 commands outstanding).
139 **/
140static void
141spider_net_write_phy(struct net_device *netdev, int mii_id,
142 int reg, int val)
143{
144 struct spider_net_card *card = netdev_priv(netdev);
145 u32 writevalue;
146
147 writevalue = ((u32)mii_id << 21) |
148 ((u32)reg << 16) | ((u32)val);
149
150 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
151}
152
153/** spider_net_read_phy - read from phy register
154 * @netdev: network device to be read from
155 * @mii_id: id of MII
156 * @reg: PHY register
157 *
158 * Returns value read from PHY register
159 *
160 * spider_net_write_phy reads from an arbitrary PHY
161 * register via the spider GPCROPCMD register
162 **/
163static int
164spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
165{
166 struct spider_net_card *card = netdev_priv(netdev);
167 u32 readvalue;
168
169 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
170 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
171
172 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
173 * interrupt, as we poll for the completion of the read operation
174 * in spider_net_read_phy. Should take about 50 us */
175 do {
176 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
177 } while (readvalue & SPIDER_NET_GPREXEC);
178
179 readvalue &= SPIDER_NET_GPRDAT_MASK;
180
181 return readvalue;
182}
183
184/**
185 * spider_net_rx_irq_on - switch on rx irq on this spider card
186 * @card: device structure
187 *
188 * switches on rx irq by enabling them in the GHIINTnMSK register
189 */
190static void
191spider_net_rx_irq_on(struct spider_net_card *card)
192{
193 u32 regvalue;
194 unsigned long flags;
195
196 spin_lock_irqsave(&card->intmask_lock, flags);
197 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
198 regvalue |= SPIDER_NET_RXINT;
199 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
200 spin_unlock_irqrestore(&card->intmask_lock, flags);
201}
202
203/**
204 * spider_net_tx_irq_off - switch off tx irq on this spider card
205 * @card: device structure
206 *
207 * switches off tx irq by masking them out in the GHIINTnMSK register
208 */
209static void
210spider_net_tx_irq_off(struct spider_net_card *card)
211{
212 u32 regvalue;
213 unsigned long flags;
214
215 spin_lock_irqsave(&card->intmask_lock, flags);
216 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
217 regvalue &= ~SPIDER_NET_TXINT;
218 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
219 spin_unlock_irqrestore(&card->intmask_lock, flags);
220}
221
222/**
223 * spider_net_tx_irq_on - switch on tx irq on this spider card
224 * @card: device structure
225 *
226 * switches on tx irq by enabling them in the GHIINTnMSK register
227 */
228static void
229spider_net_tx_irq_on(struct spider_net_card *card)
230{
231 u32 regvalue;
232 unsigned long flags;
233
234 spin_lock_irqsave(&card->intmask_lock, flags);
235 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
236 regvalue |= SPIDER_NET_TXINT;
237 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
238 spin_unlock_irqrestore(&card->intmask_lock, flags);
239}
240
241/**
242 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
243 * @card: card structure
244 *
245 * spider_net_set_promisc sets the unicast destination address filter and
246 * thus either allows for non-promisc mode or promisc mode
247 */
248static void
249spider_net_set_promisc(struct spider_net_card *card)
250{
251 u32 macu, macl;
252 struct net_device *netdev = card->netdev;
253
254 if (netdev->flags & IFF_PROMISC) {
255 /* clear destination entry 0 */
256 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
257 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
258 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
259 SPIDER_NET_PROMISC_VALUE);
260 } else {
261 macu = netdev->dev_addr[0];
262 macu <<= 8;
263 macu |= netdev->dev_addr[1];
264 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
265
266 macu |= SPIDER_NET_UA_DESCR_VALUE;
267 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
268 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
269 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
270 SPIDER_NET_NONPROMISC_VALUE);
271 }
272}
273
274/**
275 * spider_net_get_mac_address - read mac address from spider card
276 * @card: device structure
277 *
278 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
279 */
280static int
281spider_net_get_mac_address(struct net_device *netdev)
282{
283 struct spider_net_card *card = netdev_priv(netdev);
284 u32 macl, macu;
285
286 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
287 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
288
289 netdev->dev_addr[0] = (macu >> 24) & 0xff;
290 netdev->dev_addr[1] = (macu >> 16) & 0xff;
291 netdev->dev_addr[2] = (macu >> 8) & 0xff;
292 netdev->dev_addr[3] = macu & 0xff;
293 netdev->dev_addr[4] = (macl >> 8) & 0xff;
294 netdev->dev_addr[5] = macl & 0xff;
295
296 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
297 return -EINVAL;
298
299 return 0;
300}
301
302/**
303 * spider_net_get_descr_status -- returns the status of a descriptor
304 * @descr: descriptor to look at
305 *
306 * returns the status as in the dmac_cmd_status field of the descriptor
307 */
308static enum spider_net_descr_status
309spider_net_get_descr_status(struct spider_net_descr *descr)
310{
311 u32 cmd_status;
312 rmb();
313 cmd_status = descr->dmac_cmd_status;
314 rmb();
315 cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT;
316 /* no need to mask out any bits, as cmd_status is 32 bits wide only
317 * (and unsigned) */
318 return cmd_status;
319}
320
321/**
322 * spider_net_set_descr_status -- sets the status of a descriptor
323 * @descr: descriptor to change
324 * @status: status to set in the descriptor
325 *
326 * changes the status to the specified value. Doesn't change other bits
327 * in the status
328 */
329static void
330spider_net_set_descr_status(struct spider_net_descr *descr,
331 enum spider_net_descr_status status)
332{
333 u32 cmd_status;
334 /* read the status */
335 mb();
336 cmd_status = descr->dmac_cmd_status;
337 /* clean the upper 4 bits */
338 cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO;
339 /* add the status to it */
340 cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT;
341 /* and write it back */
342 descr->dmac_cmd_status = cmd_status;
343 wmb();
344}
345
346/**
347 * spider_net_free_chain - free descriptor chain
348 * @card: card structure
349 * @chain: address of chain
350 *
351 */
352static void
353spider_net_free_chain(struct spider_net_card *card,
354 struct spider_net_descr_chain *chain)
355{
356 struct spider_net_descr *descr;
357
358 for (descr = chain->tail; !descr->bus_addr; descr = descr->next) {
359 pci_unmap_single(card->pdev, descr->bus_addr,
360 SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
361 descr->bus_addr = 0;
362 }
363}
364
365/**
366 * spider_net_init_chain - links descriptor chain
367 * @card: card structure
368 * @chain: address of chain
369 * @start_descr: address of descriptor array
370 * @no: number of descriptors
371 *
372 * we manage a circular list that mirrors the hardware structure,
373 * except that the hardware uses bus addresses.
374 *
375 * returns 0 on success, <0 on failure
376 */
377static int
378spider_net_init_chain(struct spider_net_card *card,
379 struct spider_net_descr_chain *chain,
380 struct spider_net_descr *start_descr, int no)
381{
382 int i;
383 struct spider_net_descr *descr;
384
385 spin_lock_init(&card->chain_lock);
386
387 descr = start_descr;
388 memset(descr, 0, sizeof(*descr) * no);
389
390 /* set up the hardware pointers in each descriptor */
391 for (i=0; i<no; i++, descr++) {
392 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
393
394 descr->bus_addr =
395 pci_map_single(card->pdev, descr,
396 SPIDER_NET_DESCR_SIZE,
397 PCI_DMA_BIDIRECTIONAL);
398
399 if (descr->bus_addr == DMA_ERROR_CODE)
400 goto iommu_error;
401
402 descr->next = descr + 1;
403 descr->prev = descr - 1;
404
405 }
406 /* do actual circular list */
407 (descr-1)->next = start_descr;
408 start_descr->prev = descr-1;
409
410 descr = start_descr;
411 for (i=0; i < no; i++, descr++) {
412 descr->next_descr_addr = descr->next->bus_addr;
413 }
414
415 chain->head = start_descr;
416 chain->tail = start_descr;
417
418 return 0;
419
420iommu_error:
421 descr = start_descr;
422 for (i=0; i < no; i++, descr++)
423 if (descr->bus_addr)
424 pci_unmap_single(card->pdev, descr->bus_addr,
425 SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
426 return -ENOMEM;
427}
428
429/**
430 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
431 * @card: card structure
432 *
433 * returns 0 on success, <0 on failure
434 */
435static void
436spider_net_free_rx_chain_contents(struct spider_net_card *card)
437{
438 struct spider_net_descr *descr;
439
440 descr = card->rx_chain.head;
441 while (descr->next != card->rx_chain.head) {
442 if (descr->skb) {
443 dev_kfree_skb(descr->skb);
444 pci_unmap_single(card->pdev, descr->buf_addr,
445 SPIDER_NET_MAX_MTU,
446 PCI_DMA_BIDIRECTIONAL);
447 }
448 descr = descr->next;
449 }
450}
451
452/**
453 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
454 * @card: card structure
455 * @descr: descriptor to re-init
456 *
457 * return 0 on succes, <0 on failure
458 *
459 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
460 * Activate the descriptor state-wise
461 */
462static int
463spider_net_prepare_rx_descr(struct spider_net_card *card,
464 struct spider_net_descr *descr)
465{
466 int error = 0;
467 int offset;
468 int bufsize;
469
470 /* we need to round up the buffer size to a multiple of 128 */
471 bufsize = (SPIDER_NET_MAX_MTU + SPIDER_NET_RXBUF_ALIGN - 1) &
472 (~(SPIDER_NET_RXBUF_ALIGN - 1));
473
474 /* and we need to have it 128 byte aligned, therefore we allocate a
475 * bit more */
476 /* allocate an skb */
477 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
478 if (!descr->skb) {
479 if (net_ratelimit())
480 if (netif_msg_rx_err(card))
481 pr_err("Not enough memory to allocate "
482 "rx buffer\n");
483 return -ENOMEM;
484 }
485 descr->buf_size = bufsize;
486 descr->result_size = 0;
487 descr->valid_size = 0;
488 descr->data_status = 0;
489 descr->data_error = 0;
490
491 offset = ((unsigned long)descr->skb->data) &
492 (SPIDER_NET_RXBUF_ALIGN - 1);
493 if (offset)
494 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
495 /* io-mmu-map the skb */
496 descr->buf_addr = pci_map_single(card->pdev, descr->skb->data,
497 SPIDER_NET_MAX_MTU,
498 PCI_DMA_BIDIRECTIONAL);
499 if (descr->buf_addr == DMA_ERROR_CODE) {
500 dev_kfree_skb_any(descr->skb);
501 if (netif_msg_rx_err(card))
502 pr_err("Could not iommu-map rx buffer\n");
503 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
504 } else {
505 descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED;
506 }
507
508 return error;
509}
510
511/**
512 * spider_net_enable_rxctails - sets RX dmac chain tail addresses
513 * @card: card structure
514 *
515 * spider_net_enable_rxctails sets the RX DMAC chain tail adresses in the
516 * chip by writing to the appropriate register. DMA is enabled in
517 * spider_net_enable_rxdmac.
518 */
519static void
520spider_net_enable_rxchtails(struct spider_net_card *card)
521{
522 /* assume chain is aligned correctly */
523 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
524 card->rx_chain.tail->bus_addr);
525}
526
527/**
528 * spider_net_enable_rxdmac - enables a receive DMA controller
529 * @card: card structure
530 *
531 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
532 * in the GDADMACCNTR register
533 */
534static void
535spider_net_enable_rxdmac(struct spider_net_card *card)
536{
537 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
538 SPIDER_NET_DMA_RX_VALUE);
539}
540
541/**
542 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
543 * @card: card structure
544 *
545 * refills descriptors in all chains (last used chain first): allocates skbs
546 * and iommu-maps them.
547 */
548static void
549spider_net_refill_rx_chain(struct spider_net_card *card)
550{
551 struct spider_net_descr_chain *chain;
552 int count = 0;
553 unsigned long flags;
554
555 chain = &card->rx_chain;
556
557 spin_lock_irqsave(&card->chain_lock, flags);
558 while (spider_net_get_descr_status(chain->head) ==
559 SPIDER_NET_DESCR_NOT_IN_USE) {
560 if (spider_net_prepare_rx_descr(card, chain->head))
561 break;
562 count++;
563 chain->head = chain->head->next;
564 }
565 spin_unlock_irqrestore(&card->chain_lock, flags);
566
567 /* could be optimized, only do that, if we know the DMA processing
568 * has terminated */
569 if (count)
570 spider_net_enable_rxdmac(card);
571}
572
573/**
574 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
575 * @card: card structure
576 *
577 * returns 0 on success, <0 on failure
578 */
579static int
580spider_net_alloc_rx_skbs(struct spider_net_card *card)
581{
582 int result;
583 struct spider_net_descr_chain *chain;
584
585 result = -ENOMEM;
586
587 chain = &card->rx_chain;
588 /* put at least one buffer into the chain. if this fails,
589 * we've got a problem. if not, spider_net_refill_rx_chain
590 * will do the rest at the end of this function */
591 if (spider_net_prepare_rx_descr(card, chain->head))
592 goto error;
593 else
594 chain->head = chain->head->next;
595
596 /* this will allocate the rest of the rx buffers; if not, it's
597 * business as usual later on */
598 spider_net_refill_rx_chain(card);
599 return 0;
600
601error:
602 spider_net_free_rx_chain_contents(card);
603 return result;
604}
605
606/**
607 * spider_net_release_tx_descr - processes a used tx descriptor
608 * @card: card structure
609 * @descr: descriptor to release
610 *
611 * releases a used tx descriptor (unmapping, freeing of skb)
612 */
613static void
614spider_net_release_tx_descr(struct spider_net_card *card,
615 struct spider_net_descr *descr)
616{
617 struct sk_buff *skb;
618
619 /* unmap the skb */
620 skb = descr->skb;
621 pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
622 PCI_DMA_BIDIRECTIONAL);
623
624 dev_kfree_skb_any(skb);
625
626 /* set status to not used */
627 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
628}
629
630/**
631 * spider_net_release_tx_chain - processes sent tx descriptors
632 * @card: adapter structure
633 * @brutal: if set, don't care about whether descriptor seems to be in use
634 *
635 * releases the tx descriptors that spider has finished with (if non-brutal)
636 * or simply release tx descriptors (if brutal)
637 */
638static void
639spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
640{
641 struct spider_net_descr_chain *tx_chain = &card->tx_chain;
642 enum spider_net_descr_status status;
643
644 spider_net_tx_irq_off(card);
645
646 /* no lock for chain needed, if this is only executed once at a time */
647again:
648 for (;;) {
649 status = spider_net_get_descr_status(tx_chain->tail);
650 switch (status) {
651 case SPIDER_NET_DESCR_CARDOWNED:
652 if (!brutal) goto out;
653 /* fallthrough, if we release the descriptors
654 * brutally (then we don't care about
655 * SPIDER_NET_DESCR_CARDOWNED) */
656 case SPIDER_NET_DESCR_RESPONSE_ERROR:
657 case SPIDER_NET_DESCR_PROTECTION_ERROR:
658 case SPIDER_NET_DESCR_FORCE_END:
659 if (netif_msg_tx_err(card))
660 pr_err("%s: forcing end of tx descriptor "
661 "with status x%02x\n",
662 card->netdev->name, status);
663 card->netdev_stats.tx_dropped++;
664 break;
665
666 case SPIDER_NET_DESCR_COMPLETE:
667 card->netdev_stats.tx_packets++;
668 card->netdev_stats.tx_bytes +=
669 tx_chain->tail->skb->len;
670 break;
671
672 default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */
673 goto out;
674 }
675 spider_net_release_tx_descr(card, tx_chain->tail);
676 tx_chain->tail = tx_chain->tail->next;
677 }
678out:
679 netif_wake_queue(card->netdev);
680
681 if (!brutal) {
682 /* switch on tx irqs (while we are still in the interrupt
683 * handler, so we don't get an interrupt), check again
684 * for done descriptors. This results in fewer interrupts */
685 spider_net_tx_irq_on(card);
686 status = spider_net_get_descr_status(tx_chain->tail);
687 switch (status) {
688 case SPIDER_NET_DESCR_RESPONSE_ERROR:
689 case SPIDER_NET_DESCR_PROTECTION_ERROR:
690 case SPIDER_NET_DESCR_FORCE_END:
691 case SPIDER_NET_DESCR_COMPLETE:
692 goto again;
693 default:
694 break;
695 }
696 }
697
698}
699
700/**
701 * spider_net_get_multicast_hash - generates hash for multicast filter table
702 * @addr: multicast address
703 *
704 * returns the hash value.
705 *
706 * spider_net_get_multicast_hash calculates a hash value for a given multicast
707 * address, that is used to set the multicast filter tables
708 */
709static u8
710spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
711{
712 /* FIXME: an addr of 01:00:5e:00:00:01 must result in 0xa9,
713 * ff:ff:ff:ff:ff:ff must result in 0xfd */
714 u32 crc;
715 u8 hash;
716
717 crc = crc32_be(~0, addr, netdev->addr_len);
718
719 hash = (crc >> 27);
720 hash <<= 3;
721 hash |= crc & 7;
722
723 return hash;
724}
725
726/**
727 * spider_net_set_multi - sets multicast addresses and promisc flags
728 * @netdev: interface device structure
729 *
730 * spider_net_set_multi configures multicast addresses as needed for the
731 * netdev interface. It also sets up multicast, allmulti and promisc
732 * flags appropriately
733 */
734static void
735spider_net_set_multi(struct net_device *netdev)
736{
737 struct dev_mc_list *mc;
738 u8 hash;
739 int i;
740 u32 reg;
741 struct spider_net_card *card = netdev_priv(netdev);
742 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
743 {0, };
744
745 spider_net_set_promisc(card);
746
747 if (netdev->flags & IFF_ALLMULTI) {
748 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
749 set_bit(i, bitmask);
750 }
751 goto write_hash;
752 }
753
754 /* well, we know, what the broadcast hash value is: it's xfd
755 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
756 set_bit(0xfd, bitmask);
757
758 for (mc = netdev->mc_list; mc; mc = mc->next) {
759 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
760 set_bit(hash, bitmask);
761 }
762
763write_hash:
764 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
765 reg = 0;
766 if (test_bit(i * 4, bitmask))
767 reg += 0x08;
768 reg <<= 8;
769 if (test_bit(i * 4 + 1, bitmask))
770 reg += 0x08;
771 reg <<= 8;
772 if (test_bit(i * 4 + 2, bitmask))
773 reg += 0x08;
774 reg <<= 8;
775 if (test_bit(i * 4 + 3, bitmask))
776 reg += 0x08;
777
778 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
779 }
780}
781
782/**
783 * spider_net_disable_rxdmac - disables the receive DMA controller
784 * @card: card structure
785 *
786 * spider_net_disable_rxdmac terminates processing on the DMA controller by
787 * turing off DMA and issueing a force end
788 */
789static void
790spider_net_disable_rxdmac(struct spider_net_card *card)
791{
792 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
793 SPIDER_NET_DMA_RX_FEND_VALUE);
794}
795
796/**
797 * spider_net_stop - called upon ifconfig down
798 * @netdev: interface device structure
799 *
800 * always returns 0
801 */
802int
803spider_net_stop(struct net_device *netdev)
804{
805 struct spider_net_card *card = netdev_priv(netdev);
806
807 netif_poll_disable(netdev);
808 netif_carrier_off(netdev);
809 netif_stop_queue(netdev);
810
811 /* disable/mask all interrupts */
812 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
813 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
814 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
815
816 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
817 SPIDER_NET_DMA_TX_FEND_VALUE);
818
819 /* turn off DMA, force end */
820 spider_net_disable_rxdmac(card);
821
822 /* release chains */
823 spider_net_release_tx_chain(card, 1);
824
825 /* switch off card */
826 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
827 SPIDER_NET_CKRCTRL_STOP_VALUE);
828
829 spider_net_free_chain(card, &card->tx_chain);
830 spider_net_free_chain(card, &card->rx_chain);
831
832 return 0;
833}
834
835/**
836 * spider_net_get_next_tx_descr - returns the next available tx descriptor
837 * @card: device structure to get descriptor from
838 *
839 * returns the address of the next descriptor, or NULL if not available.
840 */
841static struct spider_net_descr *
842spider_net_get_next_tx_descr(struct spider_net_card *card)
843{
844 /* check, if head points to not-in-use descr */
845 if ( spider_net_get_descr_status(card->tx_chain.head) ==
846 SPIDER_NET_DESCR_NOT_IN_USE ) {
847 return card->tx_chain.head;
848 } else {
849 return NULL;
850 }
851}
852
853/**
854 * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field
855 * @descr: descriptor structure to fill out
856 * @skb: packet to consider
857 *
858 * fills out the command and status field of the descriptor structure,
859 * depending on hardware checksum settings. This function assumes a wmb()
860 * has executed before.
861 */
862static void
863spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr,
864 struct sk_buff *skb)
865{
866 if (skb->ip_summed != CHECKSUM_HW) {
867 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
868 return;
869 }
870
871 /* is packet ip?
872 * if yes: tcp? udp? */
873 if (skb->protocol == htons(ETH_P_IP)) {
874 if (skb->nh.iph->protocol == IPPROTO_TCP) {
875 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS;
876 } else if (skb->nh.iph->protocol == IPPROTO_UDP) {
877 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS;
878 } else { /* the stack should checksum non-tcp and non-udp
879 packets on his own: NETIF_F_IP_CSUM */
880 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
881 }
882 }
883}
884
885/**
886 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
887 * @card: card structure
888 * @descr: descriptor structure to fill out
889 * @skb: packet to use
890 *
891 * returns 0 on success, <0 on failure.
892 *
893 * fills out the descriptor structure with skb data and len. Copies data,
894 * if needed (32bit DMA!)
895 */
896static int
897spider_net_prepare_tx_descr(struct spider_net_card *card,
898 struct spider_net_descr *descr,
899 struct sk_buff *skb)
900{
901 descr->buf_addr = pci_map_single(card->pdev, skb->data,
902 skb->len, PCI_DMA_BIDIRECTIONAL);
903 if (descr->buf_addr == DMA_ERROR_CODE) {
904 if (netif_msg_tx_err(card))
905 pr_err("could not iommu-map packet (%p, %i). "
906 "Dropping packet\n", skb->data, skb->len);
907 return -ENOMEM;
908 }
909
910 descr->buf_size = skb->len;
911 descr->skb = skb;
912 descr->data_status = 0;
913
914 /* make sure the above values are in memory before we change the
915 * status */
916 wmb();
917
918 spider_net_set_txdescr_cmdstat(descr,skb);
919
920 return 0;
921}
922
923/**
924 * spider_net_kick_tx_dma - enables TX DMA processing
925 * @card: card structure
926 * @descr: descriptor address to enable TX processing at
927 *
928 * spider_net_kick_tx_dma writes the current tx chain head as start address
929 * of the tx descriptor chain and enables the transmission DMA engine
930 */
931static void
932spider_net_kick_tx_dma(struct spider_net_card *card,
933 struct spider_net_descr *descr)
934{
935 /* this is the only descriptor in the output chain.
936 * Enable TX DMA */
937
938 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
939 descr->bus_addr);
940
941 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
942 SPIDER_NET_DMA_TX_VALUE);
943}
944
945/**
946 * spider_net_xmit - transmits a frame over the device
947 * @skb: packet to send out
948 * @netdev: interface device structure
949 *
950 * returns 0 on success, <0 on failure
951 */
952static int
953spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
954{
955 struct spider_net_card *card = netdev_priv(netdev);
956 struct spider_net_descr *descr;
957 int result;
958
959 descr = spider_net_get_next_tx_descr(card);
960
961 if (!descr) {
962 netif_stop_queue(netdev);
963
964 descr = spider_net_get_next_tx_descr(card);
965 if (!descr)
966 goto error;
967 else
968 netif_start_queue(netdev);
969 }
970
971 result = spider_net_prepare_tx_descr(card, descr, skb);
972 if (result)
973 goto error;
974
975 card->tx_chain.head = card->tx_chain.head->next;
976
977 /* make sure the status from spider_net_prepare_tx_descr is in
978 * memory before we check out the previous descriptor */
979 wmb();
980
981 if (spider_net_get_descr_status(descr->prev) !=
982 SPIDER_NET_DESCR_CARDOWNED)
983 spider_net_kick_tx_dma(card, descr);
984
985 return NETDEV_TX_OK;
986
987error:
988 card->netdev_stats.tx_dropped++;
989 return NETDEV_TX_LOCKED;
990}
991
992/**
993 * spider_net_do_ioctl - called for device ioctls
994 * @netdev: interface device structure
995 * @ifr: request parameter structure for ioctl
996 * @cmd: command code for ioctl
997 *
998 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
999 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
1000 */
1001static int
1002spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1003{
1004 switch (cmd) {
1005 default:
1006 return -EOPNOTSUPP;
1007 }
1008}
1009
1010/**
1011 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
1012 * @descr: descriptor to process
1013 * @card: card structure
1014 *
1015 * returns 1 on success, 0 if no packet was passed to the stack
1016 *
1017 * iommu-unmaps the skb, fills out skb structure and passes the data to the
1018 * stack. The descriptor state is not changed.
1019 */
1020static int
1021spider_net_pass_skb_up(struct spider_net_descr *descr,
1022 struct spider_net_card *card)
1023{
1024 struct sk_buff *skb;
1025 struct net_device *netdev;
1026 u32 data_status, data_error;
1027
1028 data_status = descr->data_status;
1029 data_error = descr->data_error;
1030
1031 netdev = card->netdev;
1032
1033 /* check for errors in the data_error flag */
1034 if ((data_error & SPIDER_NET_DATA_ERROR_MASK) &&
1035 netif_msg_rx_err(card))
1036 pr_err("error in received descriptor found, "
1037 "data_status=x%08x, data_error=x%08x\n",
1038 data_status, data_error);
1039
1040 /* prepare skb, unmap descriptor */
1041 skb = descr->skb;
1042 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_MTU,
1043 PCI_DMA_BIDIRECTIONAL);
1044
1045 /* the cases we'll throw away the packet immediately */
1046 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS)
1047 return 0;
1048
1049 skb->dev = netdev;
1050 skb_put(skb, descr->valid_size);
1051
1052 /* the card seems to add 2 bytes of junk in front
1053 * of the ethernet frame */
1054#define SPIDER_MISALIGN 2
1055 skb_pull(skb, SPIDER_MISALIGN);
1056 skb->protocol = eth_type_trans(skb, netdev);
1057
1058 /* checksum offload */
1059 if (card->options.rx_csum) {
1060 if ( (data_status & SPIDER_NET_DATA_STATUS_CHK_MASK) &&
1061 (!(data_error & SPIDER_NET_DATA_ERROR_CHK_MASK)) )
1062 skb->ip_summed = CHECKSUM_UNNECESSARY;
1063 else
1064 skb->ip_summed = CHECKSUM_NONE;
1065 } else {
1066 skb->ip_summed = CHECKSUM_NONE;
1067 }
1068
1069 if (data_status & SPIDER_NET_VLAN_PACKET) {
1070 /* further enhancements: HW-accel VLAN
1071 * vlan_hwaccel_receive_skb
1072 */
1073 }
1074
1075 /* pass skb up to stack */
1076 netif_receive_skb(skb);
1077
1078 /* update netdevice statistics */
1079 card->netdev_stats.rx_packets++;
1080 card->netdev_stats.rx_bytes += skb->len;
1081
1082 return 1;
1083}
1084
1085/**
1086 * spider_net_decode_descr - processes an rx descriptor
1087 * @card: card structure
1088 *
1089 * returns 1 if a packet has been sent to the stack, otherwise 0
1090 *
1091 * processes an rx descriptor by iommu-unmapping the data buffer and passing
1092 * the packet up to the stack
1093 */
1094static int
1095spider_net_decode_one_descr(struct spider_net_card *card)
1096{
1097 enum spider_net_descr_status status;
1098 struct spider_net_descr *descr;
1099 struct spider_net_descr_chain *chain;
1100 int result;
1101
1102 chain = &card->rx_chain;
1103 descr = chain->tail;
1104
1105 status = spider_net_get_descr_status(descr);
1106
1107 if (status == SPIDER_NET_DESCR_CARDOWNED) {
1108 /* nothing in the descriptor yet */
1109 return 0;
1110 }
1111
1112 if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
1113 /* not initialized yet, I bet chain->tail == chain->head
1114 * and the ring is empty */
1115 spider_net_refill_rx_chain(card);
1116 return 0;
1117 }
1118
1119 /* descriptor definitively used -- move on head */
1120 chain->tail = descr->next;
1121
1122 result = 0;
1123 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1124 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1125 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1126 if (netif_msg_rx_err(card))
1127 pr_err("%s: dropping RX descriptor with state %d\n",
1128 card->netdev->name, status);
1129 card->netdev_stats.rx_dropped++;
1130 goto refill;
1131 }
1132
1133 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1134 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1135 if (netif_msg_rx_err(card))
1136 pr_err("%s: RX descriptor with state %d\n",
1137 card->netdev->name, status);
1138 goto refill;
1139 }
1140
1141 /* ok, we've got a packet in descr */
1142 result = spider_net_pass_skb_up(descr, card);
1143refill:
1144 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
1145 /* change the descriptor state: */
1146 spider_net_refill_rx_chain(card);
1147
1148 return result;
1149}
1150
1151/**
1152 * spider_net_poll - NAPI poll function called by the stack to return packets
1153 * @netdev: interface device structure
1154 * @budget: number of packets we can pass to the stack at most
1155 *
1156 * returns 0 if no more packets available to the driver/stack. Returns 1,
1157 * if the quota is exceeded, but the driver has still packets.
1158 *
1159 * spider_net_poll returns all packets from the rx descriptors to the stack
1160 * (using netif_receive_skb). If all/enough packets are up, the driver
1161 * reenables interrupts and returns 0. If not, 1 is returned.
1162 */
1163static int
1164spider_net_poll(struct net_device *netdev, int *budget)
1165{
1166 struct spider_net_card *card = netdev_priv(netdev);
1167 int packets_to_do, packets_done = 0;
1168 int no_more_packets = 0;
1169
1170 packets_to_do = min(*budget, netdev->quota);
1171
1172 while (packets_to_do) {
1173 if (spider_net_decode_one_descr(card)) {
1174 packets_done++;
1175 packets_to_do--;
1176 } else {
1177 /* no more packets for the stack */
1178 no_more_packets = 1;
1179 break;
1180 }
1181 }
1182
1183 netdev->quota -= packets_done;
1184 *budget -= packets_done;
1185
1186 /* if all packets are in the stack, enable interrupts and return 0 */
1187 /* if not, return 1 */
1188 if (no_more_packets) {
1189 netif_rx_complete(netdev);
1190 spider_net_rx_irq_on(card);
1191 return 0;
1192 }
1193
1194 return 1;
1195}
1196
1197/**
1198 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1199 * @netdev: interface device structure
1200 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1201 */
1202static void
1203spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1204{
1205 /* further enhancement... yet to do */
1206 return;
1207}
1208
1209/**
1210 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1211 * @netdev: interface device structure
1212 * @vid: VLAN id to add
1213 */
1214static void
1215spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1216{
1217 /* further enhancement... yet to do */
1218 /* add vid to card's VLAN filter table */
1219 return;
1220}
1221
1222/**
1223 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1224 * @netdev: interface device structure
1225 * @vid: VLAN id to remove
1226 */
1227static void
1228spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1229{
1230 /* further enhancement... yet to do */
1231 /* remove vid from card's VLAN filter table */
1232}
1233
1234/**
1235 * spider_net_get_stats - get interface statistics
1236 * @netdev: interface device structure
1237 *
1238 * returns the interface statistics residing in the spider_net_card struct
1239 */
1240static struct net_device_stats *
1241spider_net_get_stats(struct net_device *netdev)
1242{
1243 struct spider_net_card *card = netdev_priv(netdev);
1244 struct net_device_stats *stats = &card->netdev_stats;
1245 return stats;
1246}
1247
1248/**
1249 * spider_net_change_mtu - changes the MTU of an interface
1250 * @netdev: interface device structure
1251 * @new_mtu: new MTU value
1252 *
1253 * returns 0 on success, <0 on failure
1254 */
1255static int
1256spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1257{
1258 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1259 * and mtu is outbound only anyway */
1260 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1261 (new_mtu > SPIDER_NET_MAX_MTU) )
1262 return -EINVAL;
1263 netdev->mtu = new_mtu;
1264 return 0;
1265}
1266
1267/**
1268 * spider_net_set_mac - sets the MAC of an interface
1269 * @netdev: interface device structure
1270 * @ptr: pointer to new MAC address
1271 *
1272 * Returns 0 on success, <0 on failure. Currently, we don't support this
1273 * and will always return EOPNOTSUPP.
1274 */
1275static int
1276spider_net_set_mac(struct net_device *netdev, void *p)
1277{
1278 struct spider_net_card *card = netdev_priv(netdev);
1279 u32 macl, macu;
1280 struct sockaddr *addr = p;
1281
1282 /* GMACTPE and GMACRPE must be off, so we only allow this, if
1283 * the device is down */
1284 if (netdev->flags & IFF_UP)
1285 return -EBUSY;
1286
1287 if (!is_valid_ether_addr(addr->sa_data))
1288 return -EADDRNOTAVAIL;
1289
1290 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1291 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1292 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1293 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1294 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1295
1296 spider_net_set_promisc(card);
1297
1298 /* look up, whether we have been successful */
1299 if (spider_net_get_mac_address(netdev))
1300 return -EADDRNOTAVAIL;
1301 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1302 return -EADDRNOTAVAIL;
1303
1304 return 0;
1305}
1306
1307/**
1308 * spider_net_enable_txdmac - enables a TX DMA controller
1309 * @card: card structure
1310 *
1311 * spider_net_enable_txdmac enables the TX DMA controller by setting the
1312 * descriptor chain tail address
1313 */
1314static void
1315spider_net_enable_txdmac(struct spider_net_card *card)
1316{
1317 /* assume chain is aligned correctly */
1318 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
1319 card->tx_chain.tail->bus_addr);
1320}
1321
1322/**
1323 * spider_net_handle_error_irq - handles errors raised by an interrupt
1324 * @card: card structure
1325 * @status_reg: interrupt status register 0 (GHIINT0STS)
1326 *
1327 * spider_net_handle_error_irq treats or ignores all error conditions
1328 * found when an interrupt is presented
1329 */
1330static void
1331spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1332{
1333 u32 error_reg1, error_reg2;
1334 u32 i;
1335 int show_error = 1;
1336
1337 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1338 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1339
1340 /* check GHIINT0STS ************************************/
1341 if (status_reg)
1342 for (i = 0; i < 32; i++)
1343 if (status_reg & (1<<i))
1344 switch (i)
1345 {
1346 /* let error_reg1 and error_reg2 evaluation decide, what to do
1347 case SPIDER_NET_PHYINT:
1348 case SPIDER_NET_GMAC2INT:
1349 case SPIDER_NET_GMAC1INT:
1350 case SPIDER_NET_GIPSINT:
1351 case SPIDER_NET_GFIFOINT:
1352 case SPIDER_NET_DMACINT:
1353 case SPIDER_NET_GSYSINT:
1354 break; */
1355
1356 case SPIDER_NET_GPWOPCMPINT:
1357 /* PHY write operation completed */
1358 show_error = 0;
1359 break;
1360 case SPIDER_NET_GPROPCMPINT:
1361 /* PHY read operation completed */
1362 /* we don't use semaphores, as we poll for the completion
1363 * of the read operation in spider_net_read_phy. Should take
1364 * about 50 us */
1365 show_error = 0;
1366 break;
1367 case SPIDER_NET_GPWFFINT:
1368 /* PHY command queue full */
1369 if (netif_msg_intr(card))
1370 pr_err("PHY write queue full\n");
1371 show_error = 0;
1372 break;
1373
1374 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1375 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1376 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1377
1378 case SPIDER_NET_GDTDEN0INT:
1379 /* someone has set TX_DMA_EN to 0 */
1380 show_error = 0;
1381 break;
1382
1383 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1384 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1385 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1386 case SPIDER_NET_GDADEN0INT:
1387 /* someone has set RX_DMA_EN to 0 */
1388 show_error = 0;
1389 break;
1390
1391 /* RX interrupts */
1392 case SPIDER_NET_GDDFDCINT:
1393 case SPIDER_NET_GDCFDCINT:
1394 case SPIDER_NET_GDBFDCINT:
1395 case SPIDER_NET_GDAFDCINT:
1396 /* case SPIDER_NET_GDNMINT: not used. print a message */
1397 /* case SPIDER_NET_GCNMINT: not used. print a message */
1398 /* case SPIDER_NET_GBNMINT: not used. print a message */
1399 /* case SPIDER_NET_GANMINT: not used. print a message */
1400 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1401 show_error = 0;
1402 break;
1403
1404 /* TX interrupts */
1405 case SPIDER_NET_GDTFDCINT:
1406 show_error = 0;
1407 break;
1408 case SPIDER_NET_GTTEDINT:
1409 show_error = 0;
1410 break;
1411 case SPIDER_NET_GDTDCEINT:
1412 /* chain end. If a descriptor should be sent, kick off
1413 * tx dma
1414 if (card->tx_chain.tail == card->tx_chain.head)
1415 spider_net_kick_tx_dma(card);
1416 show_error = 0; */
1417 break;
1418
1419 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1420 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1421 }
1422
1423 /* check GHIINT1STS ************************************/
1424 if (error_reg1)
1425 for (i = 0; i < 32; i++)
1426 if (error_reg1 & (1<<i))
1427 switch (i)
1428 {
1429 case SPIDER_NET_GTMFLLINT:
1430 if (netif_msg_intr(card))
1431 pr_err("Spider TX RAM full\n");
1432 show_error = 0;
1433 break;
1434 case SPIDER_NET_GRMFLLINT:
1435 if (netif_msg_intr(card))
1436 pr_err("Spider RX RAM full, incoming packets "
1437 "might be discarded !\n");
1438 netif_rx_schedule(card->netdev);
1439 spider_net_enable_rxchtails(card);
1440 spider_net_enable_rxdmac(card);
1441 break;
1442
1443 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1444 case SPIDER_NET_GDTINVDINT:
1445 /* allrighty. tx from previous descr ok */
1446 show_error = 0;
1447 break;
1448 /* case SPIDER_NET_GRFDFLLINT: print a message down there */
1449 /* case SPIDER_NET_GRFCFLLINT: print a message down there */
1450 /* case SPIDER_NET_GRFBFLLINT: print a message down there */
1451 /* case SPIDER_NET_GRFAFLLINT: print a message down there */
1452
1453 /* chain end */
1454 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1455 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1456 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1457 case SPIDER_NET_GDADCEINT:
1458 if (netif_msg_intr(card))
1459 pr_err("got descriptor chain end interrupt, "
1460 "restarting DMAC %c.\n",
1461 'D'+i-SPIDER_NET_GDDDCEINT);
1462 spider_net_refill_rx_chain(card);
1463 show_error = 0;
1464 break;
1465
1466 /* invalid descriptor */
1467 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1468 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1469 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1470 case SPIDER_NET_GDAINVDINT:
1471 /* could happen when rx chain is full */
1472 spider_net_refill_rx_chain(card);
1473 show_error = 0;
1474 break;
1475
1476 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1477 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1478 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1479 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1480 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1481 /* case SPIDER_NET_GDSERINT: problem, print a message */
1482 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1483 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1484 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1485 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1486 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1487 default:
1488 show_error = 1;
1489 break;
1490 }
1491
1492 /* check GHIINT2STS ************************************/
1493 if (error_reg2)
1494 for (i = 0; i < 32; i++)
1495 if (error_reg2 & (1<<i))
1496 switch (i)
1497 {
1498 /* there is nothing we can (want to) do at this time. Log a
1499 * message, we can switch on and off the specific values later on
1500 case SPIDER_NET_GPROPERINT:
1501 case SPIDER_NET_GMCTCRSNGINT:
1502 case SPIDER_NET_GMCTLCOLINT:
1503 case SPIDER_NET_GMCTTMOTINT:
1504 case SPIDER_NET_GMCRCAERINT:
1505 case SPIDER_NET_GMCRCALERINT:
1506 case SPIDER_NET_GMCRALNERINT:
1507 case SPIDER_NET_GMCROVRINT:
1508 case SPIDER_NET_GMCRRNTINT:
1509 case SPIDER_NET_GMCRRXERINT:
1510 case SPIDER_NET_GTITCSERINT:
1511 case SPIDER_NET_GTIFMTERINT:
1512 case SPIDER_NET_GTIPKTRVKINT:
1513 case SPIDER_NET_GTISPINGINT:
1514 case SPIDER_NET_GTISADNGINT:
1515 case SPIDER_NET_GTISPDNGINT:
1516 case SPIDER_NET_GRIFMTERINT:
1517 case SPIDER_NET_GRIPKTRVKINT:
1518 case SPIDER_NET_GRISPINGINT:
1519 case SPIDER_NET_GRISADNGINT:
1520 case SPIDER_NET_GRISPDNGINT:
1521 break;
1522 */
1523 default:
1524 break;
1525 }
1526
1527 if ((show_error) && (netif_msg_intr(card)))
1528 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1529 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1530 status_reg, error_reg1, error_reg2);
1531
1532 /* clear interrupt sources */
1533 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1534 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1535}
1536
1537/**
1538 * spider_net_interrupt - interrupt handler for spider_net
1539 * @irq: interupt number
1540 * @ptr: pointer to net_device
1541 * @regs: PU registers
1542 *
1543 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1544 * interrupt found raised by card.
1545 *
1546 * This is the interrupt handler, that turns off
1547 * interrupts for this device and makes the stack poll the driver
1548 */
1549static irqreturn_t
1550spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs)
1551{
1552 struct net_device *netdev = ptr;
1553 struct spider_net_card *card = netdev_priv(netdev);
1554 u32 status_reg;
1555
1556 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1557
1558 if (!status_reg)
1559 return IRQ_NONE;
1560
1561 if (status_reg & SPIDER_NET_TXINT)
1562 spider_net_release_tx_chain(card, 0);
1563
1564 if (status_reg & SPIDER_NET_RXINT ) {
1565 spider_net_rx_irq_off(card);
1566 netif_rx_schedule(netdev);
1567 }
1568
1569 /* we do this after rx and tx processing, as we want the tx chain
1570 * processed to see, whether we should restart tx dma processing */
1571 spider_net_handle_error_irq(card, status_reg);
1572
1573 /* clear interrupt sources */
1574 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1575
1576 return IRQ_HANDLED;
1577}
1578
1579#ifdef CONFIG_NET_POLL_CONTROLLER
1580/**
1581 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1582 * @netdev: interface device structure
1583 *
1584 * see Documentation/networking/netconsole.txt
1585 */
1586static void
1587spider_net_poll_controller(struct net_device *netdev)
1588{
1589 disable_irq(netdev->irq);
1590 spider_net_interrupt(netdev->irq, netdev, NULL);
1591 enable_irq(netdev->irq);
1592}
1593#endif /* CONFIG_NET_POLL_CONTROLLER */
1594
1595/**
1596 * spider_net_init_card - initializes the card
1597 * @card: card structure
1598 *
1599 * spider_net_init_card initializes the card so that other registers can
1600 * be used
1601 */
1602static void
1603spider_net_init_card(struct spider_net_card *card)
1604{
1605 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1606 SPIDER_NET_CKRCTRL_STOP_VALUE);
1607
1608 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1609 SPIDER_NET_CKRCTRL_RUN_VALUE);
1610}
1611
1612/**
1613 * spider_net_enable_card - enables the card by setting all kinds of regs
1614 * @card: card structure
1615 *
1616 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1617 */
1618static void
1619spider_net_enable_card(struct spider_net_card *card)
1620{
1621 int i;
1622 /* the following array consists of (register),(value) pairs
1623 * that are set in this function. A register of 0 ends the list */
1624 u32 regs[][2] = {
1625 { SPIDER_NET_GRESUMINTNUM, 0 },
1626 { SPIDER_NET_GREINTNUM, 0 },
1627
1628 /* set interrupt frame number registers */
1629 /* clear the single DMA engine registers first */
1630 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1631 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1632 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1633 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1634 /* then set, what we really need */
1635 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1636
1637 /* timer counter registers and stuff */
1638 { SPIDER_NET_GFREECNNUM, 0 },
1639 { SPIDER_NET_GONETIMENUM, 0 },
1640 { SPIDER_NET_GTOUTFRMNUM, 0 },
1641
1642 /* RX mode setting */
1643 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1644 /* TX mode setting */
1645 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1646 /* IPSEC mode setting */
1647 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1648
1649 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1650
1651 { SPIDER_NET_GMRWOLCTRL, 0 },
1652 { SPIDER_NET_GTESTMD, 0 },
1653
1654 { SPIDER_NET_GMACINTEN, 0 },
1655
1656 /* flow control stuff */
1657 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1658 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1659
1660 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1661 { 0, 0}
1662 };
1663
1664 i = 0;
1665 while (regs[i][0]) {
1666 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1667 i++;
1668 }
1669
1670 /* clear unicast filter table entries 1 to 14 */
1671 for (i = 1; i <= 14; i++) {
1672 spider_net_write_reg(card,
1673 SPIDER_NET_GMRUAFILnR + i * 8,
1674 0x00080000);
1675 spider_net_write_reg(card,
1676 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1677 0x00000000);
1678 }
1679
1680 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1681
1682 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1683
1684 /* set chain tail adress for RX chains and
1685 * enable DMA */
1686 spider_net_enable_rxchtails(card);
1687 spider_net_enable_rxdmac(card);
1688
1689 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1690
1691 /* set chain tail adress for TX chain */
1692 spider_net_enable_txdmac(card);
1693
1694 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1695 SPIDER_NET_LENLMT_VALUE);
1696 spider_net_write_reg(card, SPIDER_NET_GMACMODE,
1697 SPIDER_NET_MACMODE_VALUE);
1698 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1699 SPIDER_NET_OPMODE_VALUE);
1700
1701 /* set interrupt mask registers */
1702 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1703 SPIDER_NET_INT0_MASK_VALUE);
1704 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1705 SPIDER_NET_INT1_MASK_VALUE);
1706 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1707 SPIDER_NET_INT2_MASK_VALUE);
1708}
1709
1710/**
1711 * spider_net_open - called upon ifonfig up
1712 * @netdev: interface device structure
1713 *
1714 * returns 0 on success, <0 on failure
1715 *
1716 * spider_net_open allocates all the descriptors and memory needed for
1717 * operation, sets up multicast list and enables interrupts
1718 */
1719int
1720spider_net_open(struct net_device *netdev)
1721{
1722 struct spider_net_card *card = netdev_priv(netdev);
1723 int result;
1724
1725 result = -ENOMEM;
1726 if (spider_net_init_chain(card, &card->tx_chain,
1727 card->descr, tx_descriptors))
1728 goto alloc_tx_failed;
1729 if (spider_net_init_chain(card, &card->rx_chain,
1730 card->descr + tx_descriptors, rx_descriptors))
1731 goto alloc_rx_failed;
1732
1733 /* allocate rx skbs */
1734 if (spider_net_alloc_rx_skbs(card))
1735 goto alloc_skbs_failed;
1736
1737 spider_net_set_multi(netdev);
1738
1739 /* further enhancement: setup hw vlan, if needed */
1740
1741 result = -EBUSY;
1742 if (request_irq(netdev->irq, spider_net_interrupt,
1743 SA_SHIRQ, netdev->name, netdev))
1744 goto register_int_failed;
1745
1746 spider_net_enable_card(card);
1747
1748 return 0;
1749
1750register_int_failed:
1751 spider_net_free_rx_chain_contents(card);
1752alloc_skbs_failed:
1753 spider_net_free_chain(card, &card->rx_chain);
1754alloc_rx_failed:
1755 spider_net_free_chain(card, &card->tx_chain);
1756alloc_tx_failed:
1757 return result;
1758}
1759
1760/**
1761 * spider_net_setup_phy - setup PHY
1762 * @card: card structure
1763 *
1764 * returns 0 on success, <0 on failure
1765 *
1766 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1767 * the PHY to 1000 Mbps
1768 **/
1769static int
1770spider_net_setup_phy(struct spider_net_card *card)
1771{
1772 struct mii_phy *phy = &card->phy;
1773
1774 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1775 SPIDER_NET_DMASEL_VALUE);
1776 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1777 SPIDER_NET_PHY_CTRL_VALUE);
1778 phy->mii_id = 1;
1779 phy->dev = card->netdev;
1780 phy->mdio_read = spider_net_read_phy;
1781 phy->mdio_write = spider_net_write_phy;
1782
1783 mii_phy_probe(phy, phy->mii_id);
1784
1785 if (phy->def->ops->setup_forced)
1786 phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
1787
1788 /* the following two writes could be moved to sungem_phy.c */
1789 /* enable fiber mode */
1790 spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x9020);
1791 /* LEDs active in both modes, autosense prio = fiber */
1792 spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x945f);
1793
1794 phy->def->ops->read_link(phy);
1795 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
1796 phy->speed, phy->duplex==1 ? "Full" : "Half");
1797
1798 return 0;
1799}
1800
1801/**
1802 * spider_net_download_firmware - loads firmware into the adapter
1803 * @card: card structure
1804 * @firmware: firmware pointer
1805 *
1806 * spider_net_download_firmware loads the firmware opened by
1807 * spider_net_init_firmware into the adapter.
1808 */
1809static void
1810spider_net_download_firmware(struct spider_net_card *card,
1811 const struct firmware *firmware)
1812{
1813 int sequencer, i;
1814 u32 *fw_ptr = (u32 *)firmware->data;
1815
1816 /* stop sequencers */
1817 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1818 SPIDER_NET_STOP_SEQ_VALUE);
1819
1820 for (sequencer = 0; sequencer < 6; sequencer++) {
1821 spider_net_write_reg(card,
1822 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1823 for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
1824 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1825 sequencer * 8, *fw_ptr);
1826 fw_ptr++;
1827 }
1828 }
1829
1830 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1831 SPIDER_NET_RUN_SEQ_VALUE);
1832}
1833
1834/**
1835 * spider_net_init_firmware - reads in firmware parts
1836 * @card: card structure
1837 *
1838 * Returns 0 on success, <0 on failure
1839 *
1840 * spider_net_init_firmware opens the sequencer firmware and does some basic
1841 * checks. This function opens and releases the firmware structure. A call
1842 * to download the firmware is performed before the release.
1843 *
1844 * Firmware format
1845 * ===============
1846 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1847 * the program for each sequencer. Use the command
1848 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1849 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1850 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1851 *
1852 * to generate spider_fw.bin, if you have sequencer programs with something
1853 * like the following contents for each sequencer:
1854 * <ONE LINE COMMENT>
1855 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1856 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1857 * ...
1858 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1859 */
1860static int
1861spider_net_init_firmware(struct spider_net_card *card)
1862{
1863 const struct firmware *firmware;
1864 int err = -EIO;
1865
1866 if (request_firmware(&firmware,
1867 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) < 0) {
1868 if (netif_msg_probe(card))
1869 pr_err("Couldn't read in sequencer data file %s.\n",
1870 SPIDER_NET_FIRMWARE_NAME);
1871 firmware = NULL;
1872 goto out;
1873 }
1874
1875 if (firmware->size != 6 * SPIDER_NET_FIRMWARE_LEN * sizeof(u32)) {
1876 if (netif_msg_probe(card))
1877 pr_err("Invalid size of sequencer data file %s.\n",
1878 SPIDER_NET_FIRMWARE_NAME);
1879 goto out;
1880 }
1881
1882 spider_net_download_firmware(card, firmware);
1883
1884 err = 0;
1885out:
1886 release_firmware(firmware);
1887
1888 return err;
1889}
1890
1891/**
1892 * spider_net_workaround_rxramfull - work around firmware bug
1893 * @card: card structure
1894 *
1895 * no return value
1896 **/
1897static void
1898spider_net_workaround_rxramfull(struct spider_net_card *card)
1899{
1900 int i, sequencer = 0;
1901
1902 /* cancel reset */
1903 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1904 SPIDER_NET_CKRCTRL_RUN_VALUE);
1905
1906 /* empty sequencer data */
1907 for (sequencer = 0; sequencer < 6; sequencer++) {
1908 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1909 sequencer * 8, 0x0);
1910 for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
1911 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1912 sequencer * 8, 0x0);
1913 }
1914 }
1915
1916 /* set sequencer operation */
1917 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
1918
1919 /* reset */
1920 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1921 SPIDER_NET_CKRCTRL_STOP_VALUE);
1922}
1923
1924/**
1925 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1926 * function (to be called not under interrupt status)
1927 * @data: data, is interface device structure
1928 *
1929 * called as task when tx hangs, resets interface (if interface is up)
1930 */
1931static void
1932spider_net_tx_timeout_task(void *data)
1933{
1934 struct net_device *netdev = data;
1935 struct spider_net_card *card = netdev_priv(netdev);
1936
1937 if (!(netdev->flags & IFF_UP))
1938 goto out;
1939
1940 netif_device_detach(netdev);
1941 spider_net_stop(netdev);
1942
1943 spider_net_workaround_rxramfull(card);
1944 spider_net_init_card(card);
1945
1946 if (spider_net_setup_phy(card))
1947 goto out;
1948 if (spider_net_init_firmware(card))
1949 goto out;
1950
1951 spider_net_open(netdev);
1952 spider_net_kick_tx_dma(card, card->tx_chain.head);
1953 netif_device_attach(netdev);
1954
1955out:
1956 atomic_dec(&card->tx_timeout_task_counter);
1957}
1958
1959/**
1960 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1961 * @netdev: interface device structure
1962 *
1963 * called, if tx hangs. Schedules a task that resets the interface
1964 */
1965static void
1966spider_net_tx_timeout(struct net_device *netdev)
1967{
1968 struct spider_net_card *card;
1969
1970 card = netdev_priv(netdev);
1971 atomic_inc(&card->tx_timeout_task_counter);
1972 if (netdev->flags & IFF_UP)
1973 schedule_work(&card->tx_timeout_task);
1974 else
1975 atomic_dec(&card->tx_timeout_task_counter);
1976}
1977
1978/**
1979 * spider_net_setup_netdev_ops - initialization of net_device operations
1980 * @netdev: net_device structure
1981 *
1982 * fills out function pointers in the net_device structure
1983 */
1984static void
1985spider_net_setup_netdev_ops(struct net_device *netdev)
1986{
1987 netdev->open = &spider_net_open;
1988 netdev->stop = &spider_net_stop;
1989 netdev->hard_start_xmit = &spider_net_xmit;
1990 netdev->get_stats = &spider_net_get_stats;
1991 netdev->set_multicast_list = &spider_net_set_multi;
1992 netdev->set_mac_address = &spider_net_set_mac;
1993 netdev->change_mtu = &spider_net_change_mtu;
1994 netdev->do_ioctl = &spider_net_do_ioctl;
1995 /* tx watchdog */
1996 netdev->tx_timeout = &spider_net_tx_timeout;
1997 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
1998 /* NAPI */
1999 netdev->poll = &spider_net_poll;
2000 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2001 /* HW VLAN */
2002 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
2003 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
2004 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
2005#ifdef CONFIG_NET_POLL_CONTROLLER
2006 /* poll controller */
2007 netdev->poll_controller = &spider_net_poll_controller;
2008#endif /* CONFIG_NET_POLL_CONTROLLER */
2009 /* ethtool ops */
2010 netdev->ethtool_ops = &spider_net_ethtool_ops;
2011}
2012
2013/**
2014 * spider_net_setup_netdev - initialization of net_device
2015 * @card: card structure
2016 *
2017 * Returns 0 on success or <0 on failure
2018 *
2019 * spider_net_setup_netdev initializes the net_device structure
2020 **/
2021static int
2022spider_net_setup_netdev(struct spider_net_card *card)
2023{
2024 int result;
2025 struct net_device *netdev = card->netdev;
2026 struct device_node *dn;
2027 struct sockaddr addr;
2028 u8 *mac;
2029
2030 SET_MODULE_OWNER(netdev);
2031 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2032
2033 pci_set_drvdata(card->pdev, netdev);
2034 spin_lock_init(&card->intmask_lock);
2035 netdev->irq = card->pdev->irq;
2036
2037 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2038
2039 spider_net_setup_netdev_ops(netdev);
2040
2041 netdev->features = 0;
2042 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2043 * NETIF_F_HW_VLAN_FILTER */
2044
2045 netdev->irq = card->pdev->irq;
2046
2047 dn = pci_device_to_OF_node(card->pdev);
2048 mac = (u8 *)get_property(dn, "local-mac-address", NULL);
2049 memcpy(addr.sa_data, mac, ETH_ALEN);
2050
2051 result = spider_net_set_mac(netdev, &addr);
2052 if ((result) && (netif_msg_probe(card)))
2053 pr_err("Failed to set MAC address: %i\n", result);
2054
2055 result = register_netdev(netdev);
2056 if (result) {
2057 if (netif_msg_probe(card))
2058 pr_err("Couldn't register net_device: %i\n",
2059 result);
2060 return result;
2061 }
2062
2063 if (netif_msg_probe(card))
2064 pr_info("Initialized device %s.\n", netdev->name);
2065
2066 return 0;
2067}
2068
2069/**
2070 * spider_net_alloc_card - allocates net_device and card structure
2071 *
2072 * returns the card structure or NULL in case of errors
2073 *
2074 * the card and net_device structures are linked to each other
2075 */
2076static struct spider_net_card *
2077spider_net_alloc_card(void)
2078{
2079 struct net_device *netdev;
2080 struct spider_net_card *card;
2081 size_t alloc_size;
2082
2083 alloc_size = sizeof (*card) +
2084 sizeof (struct spider_net_descr) * rx_descriptors +
2085 sizeof (struct spider_net_descr) * tx_descriptors;
2086 netdev = alloc_etherdev(alloc_size);
2087 if (!netdev)
2088 return NULL;
2089
2090 card = netdev_priv(netdev);
2091 card->netdev = netdev;
2092 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2093 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
2094 init_waitqueue_head(&card->waitq);
2095 atomic_set(&card->tx_timeout_task_counter, 0);
2096
2097 return card;
2098}
2099
2100/**
2101 * spider_net_undo_pci_setup - releases PCI ressources
2102 * @card: card structure
2103 *
2104 * spider_net_undo_pci_setup releases the mapped regions
2105 */
2106static void
2107spider_net_undo_pci_setup(struct spider_net_card *card)
2108{
2109 iounmap(card->regs);
2110 pci_release_regions(card->pdev);
2111}
2112
2113/**
2114 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2115 * @card: card structure
2116 * @pdev: PCI device
2117 *
2118 * Returns the card structure or NULL if any errors occur
2119 *
2120 * spider_net_setup_pci_dev initializes pdev and together with the
2121 * functions called in spider_net_open configures the device so that
2122 * data can be transferred over it
2123 * The net_device structure is attached to the card structure, if the
2124 * function returns without error.
2125 **/
2126static struct spider_net_card *
2127spider_net_setup_pci_dev(struct pci_dev *pdev)
2128{
2129 struct spider_net_card *card;
2130 unsigned long mmio_start, mmio_len;
2131
2132 if (pci_enable_device(pdev)) {
2133 pr_err("Couldn't enable PCI device\n");
2134 return NULL;
2135 }
2136
2137 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2138 pr_err("Couldn't find proper PCI device base address.\n");
2139 goto out_disable_dev;
2140 }
2141
2142 if (pci_request_regions(pdev, spider_net_driver_name)) {
2143 pr_err("Couldn't obtain PCI resources, aborting.\n");
2144 goto out_disable_dev;
2145 }
2146
2147 pci_set_master(pdev);
2148
2149 card = spider_net_alloc_card();
2150 if (!card) {
2151 pr_err("Couldn't allocate net_device structure, "
2152 "aborting.\n");
2153 goto out_release_regions;
2154 }
2155 card->pdev = pdev;
2156
2157 /* fetch base address and length of first resource */
2158 mmio_start = pci_resource_start(pdev, 0);
2159 mmio_len = pci_resource_len(pdev, 0);
2160
2161 card->netdev->mem_start = mmio_start;
2162 card->netdev->mem_end = mmio_start + mmio_len;
2163 card->regs = ioremap(mmio_start, mmio_len);
2164
2165 if (!card->regs) {
2166 pr_err("Couldn't obtain PCI resources, aborting.\n");
2167 goto out_release_regions;
2168 }
2169
2170 return card;
2171
2172out_release_regions:
2173 pci_release_regions(pdev);
2174out_disable_dev:
2175 pci_disable_device(pdev);
2176 pci_set_drvdata(pdev, NULL);
2177 return NULL;
2178}
2179
2180/**
2181 * spider_net_probe - initialization of a device
2182 * @pdev: PCI device
2183 * @ent: entry in the device id list
2184 *
2185 * Returns 0 on success, <0 on failure
2186 *
2187 * spider_net_probe initializes pdev and registers a net_device
2188 * structure for it. After that, the device can be ifconfig'ed up
2189 **/
2190static int __devinit
2191spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2192{
2193 int err = -EIO;
2194 struct spider_net_card *card;
2195
2196 card = spider_net_setup_pci_dev(pdev);
2197 if (!card)
2198 goto out;
2199
2200 spider_net_workaround_rxramfull(card);
2201 spider_net_init_card(card);
2202
2203 err = spider_net_setup_phy(card);
2204 if (err)
2205 goto out_undo_pci;
2206
2207 err = spider_net_init_firmware(card);
2208 if (err)
2209 goto out_undo_pci;
2210
2211 err = spider_net_setup_netdev(card);
2212 if (err)
2213 goto out_undo_pci;
2214
2215 return 0;
2216
2217out_undo_pci:
2218 spider_net_undo_pci_setup(card);
2219 free_netdev(card->netdev);
2220out:
2221 return err;
2222}
2223
2224/**
2225 * spider_net_remove - removal of a device
2226 * @pdev: PCI device
2227 *
2228 * Returns 0 on success, <0 on failure
2229 *
2230 * spider_net_remove is called to remove the device and unregisters the
2231 * net_device
2232 **/
2233static void __devexit
2234spider_net_remove(struct pci_dev *pdev)
2235{
2236 struct net_device *netdev;
2237 struct spider_net_card *card;
2238
2239 netdev = pci_get_drvdata(pdev);
2240 card = netdev_priv(netdev);
2241
2242 wait_event(card->waitq,
2243 atomic_read(&card->tx_timeout_task_counter) == 0);
2244
2245 unregister_netdev(netdev);
2246 spider_net_undo_pci_setup(card);
2247 free_netdev(netdev);
2248
2249 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
2250}
2251
2252static struct pci_driver spider_net_driver = {
2253 .owner = THIS_MODULE,
2254 .name = spider_net_driver_name,
2255 .id_table = spider_net_pci_tbl,
2256 .probe = spider_net_probe,
2257 .remove = __devexit_p(spider_net_remove)
2258};
2259
2260/**
2261 * spider_net_init - init function when the driver is loaded
2262 *
2263 * spider_net_init registers the device driver
2264 */
2265static int __init spider_net_init(void)
2266{
2267 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2268 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2269 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2270 }
2271 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2272 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2273 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2274 }
2275 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2276 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2277 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2278 }
2279 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2280 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2281 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2282 }
2283
2284 return pci_register_driver(&spider_net_driver);
2285}
2286
2287/**
2288 * spider_net_cleanup - exit function when driver is unloaded
2289 *
2290 * spider_net_cleanup unregisters the device driver
2291 */
2292static void __exit spider_net_cleanup(void)
2293{
2294 pci_unregister_driver(&spider_net_driver);
2295}
2296
2297module_init(spider_net_init);
2298module_exit(spider_net_cleanup);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 16:18:29 -0500