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-rw-r--r--drivers/net/spider_net.c2334
1 files changed, 2334 insertions, 0 deletions
diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
new file mode 100644
index 000000000000..4e19220473d0
--- /dev/null
+++ b/drivers/net/spider_net.c
@@ -0,0 +1,2334 @@
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_write_reg_sync - writes to an SMMIO register of a card
113 * @card: device structure
114 * @reg: register to write to
115 * @value: value to write into the specified SMMIO register
116 *
117 * Unlike spider_net_write_reg, this will also make sure the
118 * data arrives on the card by reading the reg again.
119 */
120static void
121spider_net_write_reg_sync(struct spider_net_card *card, u32 reg, u32 value)
122{
123 value = cpu_to_le32(value);
124 writel(value, card->regs + reg);
125 (void)readl(card->regs + reg);
126}
127
128/**
129 * spider_net_rx_irq_off - switch off rx irq on this spider card
130 * @card: device structure
131 *
132 * switches off rx irq by masking them out in the GHIINTnMSK register
133 */
134static void
135spider_net_rx_irq_off(struct spider_net_card *card)
136{
137 u32 regvalue;
138 unsigned long flags;
139
140 spin_lock_irqsave(&card->intmask_lock, flags);
141 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
142 regvalue &= ~SPIDER_NET_RXINT;
143 spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue);
144 spin_unlock_irqrestore(&card->intmask_lock, flags);
145}
146
147/** spider_net_write_phy - write to phy register
148 * @netdev: adapter to be written to
149 * @mii_id: id of MII
150 * @reg: PHY register
151 * @val: value to be written to phy register
152 *
153 * spider_net_write_phy_register writes to an arbitrary PHY
154 * register via the spider GPCWOPCMD register. We assume the queue does
155 * not run full (not more than 15 commands outstanding).
156 **/
157static void
158spider_net_write_phy(struct net_device *netdev, int mii_id,
159 int reg, int val)
160{
161 struct spider_net_card *card = netdev_priv(netdev);
162 u32 writevalue;
163
164 writevalue = ((u32)mii_id << 21) |
165 ((u32)reg << 16) | ((u32)val);
166
167 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
168}
169
170/** spider_net_read_phy - read from phy register
171 * @netdev: network device to be read from
172 * @mii_id: id of MII
173 * @reg: PHY register
174 *
175 * Returns value read from PHY register
176 *
177 * spider_net_write_phy reads from an arbitrary PHY
178 * register via the spider GPCROPCMD register
179 **/
180static int
181spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
182{
183 struct spider_net_card *card = netdev_priv(netdev);
184 u32 readvalue;
185
186 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
187 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
188
189 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
190 * interrupt, as we poll for the completion of the read operation
191 * in spider_net_read_phy. Should take about 50 us */
192 do {
193 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
194 } while (readvalue & SPIDER_NET_GPREXEC);
195
196 readvalue &= SPIDER_NET_GPRDAT_MASK;
197
198 return readvalue;
199}
200
201/**
202 * spider_net_rx_irq_on - switch on rx irq on this spider card
203 * @card: device structure
204 *
205 * switches on rx irq by enabling them in the GHIINTnMSK register
206 */
207static void
208spider_net_rx_irq_on(struct spider_net_card *card)
209{
210 u32 regvalue;
211 unsigned long flags;
212
213 spin_lock_irqsave(&card->intmask_lock, flags);
214 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
215 regvalue |= SPIDER_NET_RXINT;
216 spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue);
217 spin_unlock_irqrestore(&card->intmask_lock, flags);
218}
219
220/**
221 * spider_net_tx_irq_off - switch off tx irq on this spider card
222 * @card: device structure
223 *
224 * switches off tx irq by masking them out in the GHIINTnMSK register
225 */
226static void
227spider_net_tx_irq_off(struct spider_net_card *card)
228{
229 u32 regvalue;
230 unsigned long flags;
231
232 spin_lock_irqsave(&card->intmask_lock, flags);
233 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
234 regvalue &= ~SPIDER_NET_TXINT;
235 spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue);
236 spin_unlock_irqrestore(&card->intmask_lock, flags);
237}
238
239/**
240 * spider_net_tx_irq_on - switch on tx irq on this spider card
241 * @card: device structure
242 *
243 * switches on tx irq by enabling them in the GHIINTnMSK register
244 */
245static void
246spider_net_tx_irq_on(struct spider_net_card *card)
247{
248 u32 regvalue;
249 unsigned long flags;
250
251 spin_lock_irqsave(&card->intmask_lock, flags);
252 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
253 regvalue |= SPIDER_NET_TXINT;
254 spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue);
255 spin_unlock_irqrestore(&card->intmask_lock, flags);
256}
257
258/**
259 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
260 * @card: card structure
261 *
262 * spider_net_set_promisc sets the unicast destination address filter and
263 * thus either allows for non-promisc mode or promisc mode
264 */
265static void
266spider_net_set_promisc(struct spider_net_card *card)
267{
268 u32 macu, macl;
269 struct net_device *netdev = card->netdev;
270
271 if (netdev->flags & IFF_PROMISC) {
272 /* clear destination entry 0 */
273 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
274 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
275 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
276 SPIDER_NET_PROMISC_VALUE);
277 } else {
278 macu = netdev->dev_addr[0];
279 macu <<= 8;
280 macu |= netdev->dev_addr[1];
281 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
282
283 macu |= SPIDER_NET_UA_DESCR_VALUE;
284 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
285 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
286 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
287 SPIDER_NET_NONPROMISC_VALUE);
288 }
289}
290
291/**
292 * spider_net_get_mac_address - read mac address from spider card
293 * @card: device structure
294 *
295 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
296 */
297static int
298spider_net_get_mac_address(struct net_device *netdev)
299{
300 struct spider_net_card *card = netdev_priv(netdev);
301 u32 macl, macu;
302
303 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
304 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
305
306 netdev->dev_addr[0] = (macu >> 24) & 0xff;
307 netdev->dev_addr[1] = (macu >> 16) & 0xff;
308 netdev->dev_addr[2] = (macu >> 8) & 0xff;
309 netdev->dev_addr[3] = macu & 0xff;
310 netdev->dev_addr[4] = (macl >> 8) & 0xff;
311 netdev->dev_addr[5] = macl & 0xff;
312
313 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
314 return -EINVAL;
315
316 return 0;
317}
318
319/**
320 * spider_net_get_descr_status -- returns the status of a descriptor
321 * @descr: descriptor to look at
322 *
323 * returns the status as in the dmac_cmd_status field of the descriptor
324 */
325static enum spider_net_descr_status
326spider_net_get_descr_status(struct spider_net_descr *descr)
327{
328 u32 cmd_status;
329 rmb();
330 cmd_status = descr->dmac_cmd_status;
331 rmb();
332 cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT;
333 /* no need to mask out any bits, as cmd_status is 32 bits wide only
334 * (and unsigned) */
335 return cmd_status;
336}
337
338/**
339 * spider_net_set_descr_status -- sets the status of a descriptor
340 * @descr: descriptor to change
341 * @status: status to set in the descriptor
342 *
343 * changes the status to the specified value. Doesn't change other bits
344 * in the status
345 */
346static void
347spider_net_set_descr_status(struct spider_net_descr *descr,
348 enum spider_net_descr_status status)
349{
350 u32 cmd_status;
351 /* read the status */
352 mb();
353 cmd_status = descr->dmac_cmd_status;
354 /* clean the upper 4 bits */
355 cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO;
356 /* add the status to it */
357 cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT;
358 /* and write it back */
359 descr->dmac_cmd_status = cmd_status;
360 wmb();
361}
362
363/**
364 * spider_net_free_chain - free descriptor chain
365 * @card: card structure
366 * @chain: address of chain
367 *
368 */
369static void
370spider_net_free_chain(struct spider_net_card *card,
371 struct spider_net_descr_chain *chain)
372{
373 struct spider_net_descr *descr;
374
375 for (descr = chain->tail; !descr->bus_addr; descr = descr->next) {
376 pci_unmap_single(card->pdev, descr->bus_addr,
377 SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
378 descr->bus_addr = 0;
379 }
380}
381
382/**
383 * spider_net_init_chain - links descriptor chain
384 * @card: card structure
385 * @chain: address of chain
386 * @start_descr: address of descriptor array
387 * @no: number of descriptors
388 *
389 * we manage a circular list that mirrors the hardware structure,
390 * except that the hardware uses bus addresses.
391 *
392 * returns 0 on success, <0 on failure
393 */
394static int
395spider_net_init_chain(struct spider_net_card *card,
396 struct spider_net_descr_chain *chain,
397 struct spider_net_descr *start_descr, int no)
398{
399 int i;
400 struct spider_net_descr *descr;
401
402 spin_lock_init(&card->chain_lock);
403
404 descr = start_descr;
405 memset(descr, 0, sizeof(*descr) * no);
406
407 /* set up the hardware pointers in each descriptor */
408 for (i=0; i<no; i++, descr++) {
409 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
410
411 descr->bus_addr =
412 pci_map_single(card->pdev, descr,
413 SPIDER_NET_DESCR_SIZE,
414 PCI_DMA_BIDIRECTIONAL);
415
416 if (descr->bus_addr == DMA_ERROR_CODE)
417 goto iommu_error;
418
419 descr->next = descr + 1;
420 descr->prev = descr - 1;
421
422 }
423 /* do actual circular list */
424 (descr-1)->next = start_descr;
425 start_descr->prev = descr-1;
426
427 descr = start_descr;
428 for (i=0; i < no; i++, descr++) {
429 descr->next_descr_addr = descr->next->bus_addr;
430 }
431
432 chain->head = start_descr;
433 chain->tail = start_descr;
434
435 return 0;
436
437iommu_error:
438 descr = start_descr;
439 for (i=0; i < no; i++, descr++)
440 if (descr->bus_addr)
441 pci_unmap_single(card->pdev, descr->bus_addr,
442 SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
443 return -ENOMEM;
444}
445
446/**
447 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
448 * @card: card structure
449 *
450 * returns 0 on success, <0 on failure
451 */
452static void
453spider_net_free_rx_chain_contents(struct spider_net_card *card)
454{
455 struct spider_net_descr *descr;
456
457 descr = card->rx_chain.head;
458 while (descr->next != card->rx_chain.head) {
459 if (descr->skb) {
460 dev_kfree_skb(descr->skb);
461 pci_unmap_single(card->pdev, descr->buf_addr,
462 SPIDER_NET_MAX_MTU,
463 PCI_DMA_BIDIRECTIONAL);
464 }
465 descr = descr->next;
466 }
467}
468
469/**
470 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
471 * @card: card structure
472 * @descr: descriptor to re-init
473 *
474 * return 0 on succes, <0 on failure
475 *
476 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
477 * Activate the descriptor state-wise
478 */
479static int
480spider_net_prepare_rx_descr(struct spider_net_card *card,
481 struct spider_net_descr *descr)
482{
483 int error = 0;
484 int offset;
485 int bufsize;
486
487 /* we need to round up the buffer size to a multiple of 128 */
488 bufsize = (SPIDER_NET_MAX_MTU + SPIDER_NET_RXBUF_ALIGN - 1) &
489 (~(SPIDER_NET_RXBUF_ALIGN - 1));
490
491 /* and we need to have it 128 byte aligned, therefore we allocate a
492 * bit more */
493 /* allocate an skb */
494 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
495 if (!descr->skb) {
496 if (net_ratelimit())
497 if (netif_msg_rx_err(card))
498 pr_err("Not enough memory to allocate "
499 "rx buffer\n");
500 return -ENOMEM;
501 }
502 descr->buf_size = bufsize;
503 descr->result_size = 0;
504 descr->valid_size = 0;
505 descr->data_status = 0;
506 descr->data_error = 0;
507
508 offset = ((unsigned long)descr->skb->data) &
509 (SPIDER_NET_RXBUF_ALIGN - 1);
510 if (offset)
511 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
512 /* io-mmu-map the skb */
513 descr->buf_addr = pci_map_single(card->pdev, descr->skb->data,
514 SPIDER_NET_MAX_MTU,
515 PCI_DMA_BIDIRECTIONAL);
516 if (descr->buf_addr == DMA_ERROR_CODE) {
517 dev_kfree_skb_any(descr->skb);
518 if (netif_msg_rx_err(card))
519 pr_err("Could not iommu-map rx buffer\n");
520 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
521 } else {
522 descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED;
523 }
524
525 return error;
526}
527
528/**
529 * spider_net_enable_rxctails - sets RX dmac chain tail addresses
530 * @card: card structure
531 *
532 * spider_net_enable_rxctails sets the RX DMAC chain tail adresses in the
533 * chip by writing to the appropriate register. DMA is enabled in
534 * spider_net_enable_rxdmac.
535 */
536static void
537spider_net_enable_rxchtails(struct spider_net_card *card)
538{
539 /* assume chain is aligned correctly */
540 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
541 card->rx_chain.tail->bus_addr);
542}
543
544/**
545 * spider_net_enable_rxdmac - enables a receive DMA controller
546 * @card: card structure
547 *
548 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
549 * in the GDADMACCNTR register
550 */
551static void
552spider_net_enable_rxdmac(struct spider_net_card *card)
553{
554 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
555 SPIDER_NET_DMA_RX_VALUE);
556}
557
558/**
559 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
560 * @card: card structure
561 *
562 * refills descriptors in all chains (last used chain first): allocates skbs
563 * and iommu-maps them.
564 */
565static void
566spider_net_refill_rx_chain(struct spider_net_card *card)
567{
568 struct spider_net_descr_chain *chain;
569 int count = 0;
570 unsigned long flags;
571
572 chain = &card->rx_chain;
573
574 spin_lock_irqsave(&card->chain_lock, flags);
575 while (spider_net_get_descr_status(chain->head) ==
576 SPIDER_NET_DESCR_NOT_IN_USE) {
577 if (spider_net_prepare_rx_descr(card, chain->head))
578 break;
579 count++;
580 chain->head = chain->head->next;
581 }
582 spin_unlock_irqrestore(&card->chain_lock, flags);
583
584 /* could be optimized, only do that, if we know the DMA processing
585 * has terminated */
586 if (count)
587 spider_net_enable_rxdmac(card);
588}
589
590/**
591 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
592 * @card: card structure
593 *
594 * returns 0 on success, <0 on failure
595 */
596static int
597spider_net_alloc_rx_skbs(struct spider_net_card *card)
598{
599 int result;
600 struct spider_net_descr_chain *chain;
601
602 result = -ENOMEM;
603
604 chain = &card->rx_chain;
605 /* put at least one buffer into the chain. if this fails,
606 * we've got a problem. if not, spider_net_refill_rx_chain
607 * will do the rest at the end of this function */
608 if (spider_net_prepare_rx_descr(card, chain->head))
609 goto error;
610 else
611 chain->head = chain->head->next;
612
613 /* this will allocate the rest of the rx buffers; if not, it's
614 * business as usual later on */
615 spider_net_refill_rx_chain(card);
616 return 0;
617
618error:
619 spider_net_free_rx_chain_contents(card);
620 return result;
621}
622
623/**
624 * spider_net_release_tx_descr - processes a used tx descriptor
625 * @card: card structure
626 * @descr: descriptor to release
627 *
628 * releases a used tx descriptor (unmapping, freeing of skb)
629 */
630static void
631spider_net_release_tx_descr(struct spider_net_card *card,
632 struct spider_net_descr *descr)
633{
634 struct sk_buff *skb;
635
636 /* unmap the skb */
637 skb = descr->skb;
638 pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
639 PCI_DMA_BIDIRECTIONAL);
640
641 dev_kfree_skb_any(skb);
642
643 /* set status to not used */
644 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
645}
646
647/**
648 * spider_net_release_tx_chain - processes sent tx descriptors
649 * @card: adapter structure
650 * @brutal: if set, don't care about whether descriptor seems to be in use
651 *
652 * releases the tx descriptors that spider has finished with (if non-brutal)
653 * or simply release tx descriptors (if brutal)
654 */
655static void
656spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
657{
658 struct spider_net_descr_chain *tx_chain = &card->tx_chain;
659 enum spider_net_descr_status status;
660
661 spider_net_tx_irq_off(card);
662
663 /* no lock for chain needed, if this is only executed once at a time */
664again:
665 for (;;) {
666 status = spider_net_get_descr_status(tx_chain->tail);
667 switch (status) {
668 case SPIDER_NET_DESCR_CARDOWNED:
669 if (!brutal) goto out;
670 /* fallthrough, if we release the descriptors
671 * brutally (then we don't care about
672 * SPIDER_NET_DESCR_CARDOWNED) */
673 case SPIDER_NET_DESCR_RESPONSE_ERROR:
674 case SPIDER_NET_DESCR_PROTECTION_ERROR:
675 case SPIDER_NET_DESCR_FORCE_END:
676 if (netif_msg_tx_err(card))
677 pr_err("%s: forcing end of tx descriptor "
678 "with status x%02x\n",
679 card->netdev->name, status);
680 card->netdev_stats.tx_dropped++;
681 break;
682
683 case SPIDER_NET_DESCR_COMPLETE:
684 card->netdev_stats.tx_packets++;
685 card->netdev_stats.tx_bytes +=
686 tx_chain->tail->skb->len;
687 break;
688
689 default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */
690 goto out;
691 }
692 spider_net_release_tx_descr(card, tx_chain->tail);
693 tx_chain->tail = tx_chain->tail->next;
694 }
695out:
696 netif_wake_queue(card->netdev);
697
698 if (!brutal) {
699 /* switch on tx irqs (while we are still in the interrupt
700 * handler, so we don't get an interrupt), check again
701 * for done descriptors. This results in fewer interrupts */
702 spider_net_tx_irq_on(card);
703 status = spider_net_get_descr_status(tx_chain->tail);
704 switch (status) {
705 case SPIDER_NET_DESCR_RESPONSE_ERROR:
706 case SPIDER_NET_DESCR_PROTECTION_ERROR:
707 case SPIDER_NET_DESCR_FORCE_END:
708 case SPIDER_NET_DESCR_COMPLETE:
709 goto again;
710 default:
711 break;
712 }
713 }
714
715}
716
717/**
718 * spider_net_get_multicast_hash - generates hash for multicast filter table
719 * @addr: multicast address
720 *
721 * returns the hash value.
722 *
723 * spider_net_get_multicast_hash calculates a hash value for a given multicast
724 * address, that is used to set the multicast filter tables
725 */
726static u8
727spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
728{
729 /* FIXME: an addr of 01:00:5e:00:00:01 must result in 0xa9,
730 * ff:ff:ff:ff:ff:ff must result in 0xfd */
731 u32 crc;
732 u8 hash;
733
734 crc = crc32_be(~0, addr, netdev->addr_len);
735
736 hash = (crc >> 27);
737 hash <<= 3;
738 hash |= crc & 7;
739
740 return hash;
741}
742
743/**
744 * spider_net_set_multi - sets multicast addresses and promisc flags
745 * @netdev: interface device structure
746 *
747 * spider_net_set_multi configures multicast addresses as needed for the
748 * netdev interface. It also sets up multicast, allmulti and promisc
749 * flags appropriately
750 */
751static void
752spider_net_set_multi(struct net_device *netdev)
753{
754 struct dev_mc_list *mc;
755 u8 hash;
756 int i;
757 u32 reg;
758 struct spider_net_card *card = netdev_priv(netdev);
759 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
760 {0, };
761
762 spider_net_set_promisc(card);
763
764 if (netdev->flags & IFF_ALLMULTI) {
765 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
766 set_bit(i, bitmask);
767 }
768 goto write_hash;
769 }
770
771 /* well, we know, what the broadcast hash value is: it's xfd
772 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
773 set_bit(0xfd, bitmask);
774
775 for (mc = netdev->mc_list; mc; mc = mc->next) {
776 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
777 set_bit(hash, bitmask);
778 }
779
780write_hash:
781 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
782 reg = 0;
783 if (test_bit(i * 4, bitmask))
784 reg += 0x08;
785 reg <<= 8;
786 if (test_bit(i * 4 + 1, bitmask))
787 reg += 0x08;
788 reg <<= 8;
789 if (test_bit(i * 4 + 2, bitmask))
790 reg += 0x08;
791 reg <<= 8;
792 if (test_bit(i * 4 + 3, bitmask))
793 reg += 0x08;
794
795 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
796 }
797}
798
799/**
800 * spider_net_disable_rxdmac - disables the receive DMA controller
801 * @card: card structure
802 *
803 * spider_net_disable_rxdmac terminates processing on the DMA controller by
804 * turing off DMA and issueing a force end
805 */
806static void
807spider_net_disable_rxdmac(struct spider_net_card *card)
808{
809 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
810 SPIDER_NET_DMA_RX_FEND_VALUE);
811}
812
813/**
814 * spider_net_stop - called upon ifconfig down
815 * @netdev: interface device structure
816 *
817 * always returns 0
818 */
819int
820spider_net_stop(struct net_device *netdev)
821{
822 struct spider_net_card *card = netdev_priv(netdev);
823
824 netif_poll_disable(netdev);
825 netif_carrier_off(netdev);
826 netif_stop_queue(netdev);
827
828 /* disable/mask all interrupts */
829 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
830 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
831 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
832
833 /* free_irq(netdev->irq, netdev);*/
834 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
835
836 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
837 SPIDER_NET_DMA_TX_FEND_VALUE);
838
839 /* turn off DMA, force end */
840 spider_net_disable_rxdmac(card);
841
842 /* release chains */
843 spider_net_release_tx_chain(card, 1);
844
845 spider_net_free_chain(card, &card->tx_chain);
846 spider_net_free_chain(card, &card->rx_chain);
847
848 return 0;
849}
850
851/**
852 * spider_net_get_next_tx_descr - returns the next available tx descriptor
853 * @card: device structure to get descriptor from
854 *
855 * returns the address of the next descriptor, or NULL if not available.
856 */
857static struct spider_net_descr *
858spider_net_get_next_tx_descr(struct spider_net_card *card)
859{
860 /* check, if head points to not-in-use descr */
861 if ( spider_net_get_descr_status(card->tx_chain.head) ==
862 SPIDER_NET_DESCR_NOT_IN_USE ) {
863 return card->tx_chain.head;
864 } else {
865 return NULL;
866 }
867}
868
869/**
870 * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field
871 * @descr: descriptor structure to fill out
872 * @skb: packet to consider
873 *
874 * fills out the command and status field of the descriptor structure,
875 * depending on hardware checksum settings. This function assumes a wmb()
876 * has executed before.
877 */
878static void
879spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr,
880 struct sk_buff *skb)
881{
882 if (skb->ip_summed != CHECKSUM_HW) {
883 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
884 return;
885 }
886
887 /* is packet ip?
888 * if yes: tcp? udp? */
889 if (skb->protocol == htons(ETH_P_IP)) {
890 if (skb->nh.iph->protocol == IPPROTO_TCP) {
891 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS;
892 } else if (skb->nh.iph->protocol == IPPROTO_UDP) {
893 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS;
894 } else { /* the stack should checksum non-tcp and non-udp
895 packets on his own: NETIF_F_IP_CSUM */
896 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
897 }
898 }
899}
900
901/**
902 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
903 * @card: card structure
904 * @descr: descriptor structure to fill out
905 * @skb: packet to use
906 *
907 * returns 0 on success, <0 on failure.
908 *
909 * fills out the descriptor structure with skb data and len. Copies data,
910 * if needed (32bit DMA!)
911 */
912static int
913spider_net_prepare_tx_descr(struct spider_net_card *card,
914 struct spider_net_descr *descr,
915 struct sk_buff *skb)
916{
917 descr->buf_addr = pci_map_single(card->pdev, skb->data,
918 skb->len, PCI_DMA_BIDIRECTIONAL);
919 if (descr->buf_addr == DMA_ERROR_CODE) {
920 if (netif_msg_tx_err(card))
921 pr_err("could not iommu-map packet (%p, %i). "
922 "Dropping packet\n", skb->data, skb->len);
923 return -ENOMEM;
924 }
925
926 descr->buf_size = skb->len;
927 descr->skb = skb;
928 descr->data_status = 0;
929
930 /* make sure the above values are in memory before we change the
931 * status */
932 wmb();
933
934 spider_net_set_txdescr_cmdstat(descr,skb);
935
936 return 0;
937}
938
939/**
940 * spider_net_kick_tx_dma - enables TX DMA processing
941 * @card: card structure
942 * @descr: descriptor address to enable TX processing at
943 *
944 * spider_net_kick_tx_dma writes the current tx chain head as start address
945 * of the tx descriptor chain and enables the transmission DMA engine
946 */
947static void
948spider_net_kick_tx_dma(struct spider_net_card *card,
949 struct spider_net_descr *descr)
950{
951 /* this is the only descriptor in the output chain.
952 * Enable TX DMA */
953
954 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
955 descr->bus_addr);
956
957 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
958 SPIDER_NET_DMA_TX_VALUE);
959}
960
961/**
962 * spider_net_xmit - transmits a frame over the device
963 * @skb: packet to send out
964 * @netdev: interface device structure
965 *
966 * returns 0 on success, <0 on failure
967 */
968static int
969spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
970{
971 struct spider_net_card *card = netdev_priv(netdev);
972 struct spider_net_descr *descr;
973 int result;
974
975 descr = spider_net_get_next_tx_descr(card);
976
977 if (!descr) {
978 netif_stop_queue(netdev);
979
980 descr = spider_net_get_next_tx_descr(card);
981 if (!descr)
982 goto error;
983 else
984 netif_start_queue(netdev);
985 }
986
987 result = spider_net_prepare_tx_descr(card, descr, skb);
988 if (result)
989 goto error;
990
991 card->tx_chain.head = card->tx_chain.head->next;
992
993 /* make sure the status from spider_net_prepare_tx_descr is in
994 * memory before we check out the previous descriptor */
995 wmb();
996
997 if (spider_net_get_descr_status(descr->prev) !=
998 SPIDER_NET_DESCR_CARDOWNED)
999 spider_net_kick_tx_dma(card, descr);
1000
1001 return NETDEV_TX_OK;
1002
1003error:
1004 card->netdev_stats.tx_dropped++;
1005 return NETDEV_TX_LOCKED;
1006}
1007
1008/**
1009 * spider_net_do_ioctl - called for device ioctls
1010 * @netdev: interface device structure
1011 * @ifr: request parameter structure for ioctl
1012 * @cmd: command code for ioctl
1013 *
1014 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
1015 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
1016 */
1017static int
1018spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1019{
1020 switch (cmd) {
1021 default:
1022 return -EOPNOTSUPP;
1023 }
1024}
1025
1026/**
1027 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
1028 * @descr: descriptor to process
1029 * @card: card structure
1030 *
1031 * returns 1 on success, 0 if no packet was passed to the stack
1032 *
1033 * iommu-unmaps the skb, fills out skb structure and passes the data to the
1034 * stack. The descriptor state is not changed.
1035 */
1036static int
1037spider_net_pass_skb_up(struct spider_net_descr *descr,
1038 struct spider_net_card *card)
1039{
1040 struct sk_buff *skb;
1041 struct net_device *netdev;
1042 u32 data_status, data_error;
1043
1044 data_status = descr->data_status;
1045 data_error = descr->data_error;
1046
1047 netdev = card->netdev;
1048
1049 /* check for errors in the data_error flag */
1050 if ((data_error & SPIDER_NET_DATA_ERROR_MASK) &&
1051 netif_msg_rx_err(card))
1052 pr_err("error in received descriptor found, "
1053 "data_status=x%08x, data_error=x%08x\n",
1054 data_status, data_error);
1055
1056 /* prepare skb, unmap descriptor */
1057 skb = descr->skb;
1058 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_MTU,
1059 PCI_DMA_BIDIRECTIONAL);
1060
1061 /* the cases we'll throw away the packet immediately */
1062 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS)
1063 return 0;
1064
1065 skb->dev = netdev;
1066 skb_put(skb, descr->valid_size);
1067
1068 /* the card seems to add 2 bytes of junk in front
1069 * of the ethernet frame */
1070#define SPIDER_MISALIGN 2
1071 skb_pull(skb, SPIDER_MISALIGN);
1072 skb->protocol = eth_type_trans(skb, netdev);
1073
1074 /* checksum offload */
1075 if (card->options.rx_csum) {
1076 if ( (data_status & SPIDER_NET_DATA_STATUS_CHK_MASK) &&
1077 (!(data_error & SPIDER_NET_DATA_ERROR_CHK_MASK)) )
1078 skb->ip_summed = CHECKSUM_UNNECESSARY;
1079 else
1080 skb->ip_summed = CHECKSUM_NONE;
1081 } else {
1082 skb->ip_summed = CHECKSUM_NONE;
1083 }
1084
1085 if (data_status & SPIDER_NET_VLAN_PACKET) {
1086 /* further enhancements: HW-accel VLAN
1087 * vlan_hwaccel_receive_skb
1088 */
1089 }
1090
1091 /* pass skb up to stack */
1092 netif_receive_skb(skb);
1093
1094 /* update netdevice statistics */
1095 card->netdev_stats.rx_packets++;
1096 card->netdev_stats.rx_bytes += skb->len;
1097
1098 return 1;
1099}
1100
1101/**
1102 * spider_net_decode_descr - processes an rx descriptor
1103 * @card: card structure
1104 *
1105 * returns 1 if a packet has been sent to the stack, otherwise 0
1106 *
1107 * processes an rx descriptor by iommu-unmapping the data buffer and passing
1108 * the packet up to the stack
1109 */
1110static int
1111spider_net_decode_one_descr(struct spider_net_card *card)
1112{
1113 enum spider_net_descr_status status;
1114 struct spider_net_descr *descr;
1115 struct spider_net_descr_chain *chain;
1116 int result;
1117
1118 chain = &card->rx_chain;
1119 descr = chain->tail;
1120
1121 status = spider_net_get_descr_status(descr);
1122
1123 if (status == SPIDER_NET_DESCR_CARDOWNED) {
1124 /* nothing in the descriptor yet */
1125 return 0;
1126 }
1127
1128 if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
1129 /* not initialized yet, I bet chain->tail == chain->head
1130 * and the ring is empty */
1131 spider_net_refill_rx_chain(card);
1132 return 0;
1133 }
1134
1135 /* descriptor definitively used -- move on head */
1136 chain->tail = descr->next;
1137
1138 result = 0;
1139 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1140 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1141 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1142 if (netif_msg_rx_err(card))
1143 pr_err("%s: dropping RX descriptor with state %d\n",
1144 card->netdev->name, status);
1145 card->netdev_stats.rx_dropped++;
1146 goto refill;
1147 }
1148
1149 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1150 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1151 if (netif_msg_rx_err(card))
1152 pr_err("%s: RX descriptor with state %d\n",
1153 card->netdev->name, status);
1154 goto refill;
1155 }
1156
1157 /* ok, we've got a packet in descr */
1158 result = spider_net_pass_skb_up(descr, card);
1159refill:
1160 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
1161 /* change the descriptor state: */
1162 spider_net_refill_rx_chain(card);
1163
1164 return result;
1165}
1166
1167/**
1168 * spider_net_poll - NAPI poll function called by the stack to return packets
1169 * @netdev: interface device structure
1170 * @budget: number of packets we can pass to the stack at most
1171 *
1172 * returns 0 if no more packets available to the driver/stack. Returns 1,
1173 * if the quota is exceeded, but the driver has still packets.
1174 *
1175 * spider_net_poll returns all packets from the rx descriptors to the stack
1176 * (using netif_receive_skb). If all/enough packets are up, the driver
1177 * reenables interrupts and returns 0. If not, 1 is returned.
1178 */
1179static int
1180spider_net_poll(struct net_device *netdev, int *budget)
1181{
1182 struct spider_net_card *card = netdev_priv(netdev);
1183 int packets_to_do, packets_done = 0;
1184 int no_more_packets = 0;
1185
1186 packets_to_do = min(*budget, netdev->quota);
1187
1188 while (packets_to_do) {
1189 if (spider_net_decode_one_descr(card)) {
1190 packets_done++;
1191 packets_to_do--;
1192 } else {
1193 /* no more packets for the stack */
1194 no_more_packets = 1;
1195 break;
1196 }
1197 }
1198
1199 netdev->quota -= packets_done;
1200 *budget -= packets_done;
1201
1202 /* if all packets are in the stack, enable interrupts and return 0 */
1203 /* if not, return 1 */
1204 if (no_more_packets) {
1205 netif_rx_complete(netdev);
1206 spider_net_rx_irq_on(card);
1207 return 0;
1208 }
1209
1210 return 1;
1211}
1212
1213/**
1214 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1215 * @netdev: interface device structure
1216 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1217 */
1218static void
1219spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1220{
1221 /* further enhancement... yet to do */
1222 return;
1223}
1224
1225/**
1226 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1227 * @netdev: interface device structure
1228 * @vid: VLAN id to add
1229 */
1230static void
1231spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1232{
1233 /* further enhancement... yet to do */
1234 /* add vid to card's VLAN filter table */
1235 return;
1236}
1237
1238/**
1239 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1240 * @netdev: interface device structure
1241 * @vid: VLAN id to remove
1242 */
1243static void
1244spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1245{
1246 /* further enhancement... yet to do */
1247 /* remove vid from card's VLAN filter table */
1248}
1249
1250/**
1251 * spider_net_get_stats - get interface statistics
1252 * @netdev: interface device structure
1253 *
1254 * returns the interface statistics residing in the spider_net_card struct
1255 */
1256static struct net_device_stats *
1257spider_net_get_stats(struct net_device *netdev)
1258{
1259 struct spider_net_card *card = netdev_priv(netdev);
1260 struct net_device_stats *stats = &card->netdev_stats;
1261 return stats;
1262}
1263
1264/**
1265 * spider_net_change_mtu - changes the MTU of an interface
1266 * @netdev: interface device structure
1267 * @new_mtu: new MTU value
1268 *
1269 * returns 0 on success, <0 on failure
1270 */
1271static int
1272spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1273{
1274 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1275 * and mtu is outbound only anyway */
1276 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1277 (new_mtu > SPIDER_NET_MAX_MTU) )
1278 return -EINVAL;
1279 netdev->mtu = new_mtu;
1280 return 0;
1281}
1282
1283/**
1284 * spider_net_set_mac - sets the MAC of an interface
1285 * @netdev: interface device structure
1286 * @ptr: pointer to new MAC address
1287 *
1288 * Returns 0 on success, <0 on failure. Currently, we don't support this
1289 * and will always return EOPNOTSUPP.
1290 */
1291static int
1292spider_net_set_mac(struct net_device *netdev, void *p)
1293{
1294 struct spider_net_card *card = netdev_priv(netdev);
1295 u32 macl, macu, regvalue;
1296 struct sockaddr *addr = p;
1297
1298 if (!is_valid_ether_addr(addr->sa_data))
1299 return -EADDRNOTAVAIL;
1300
1301 /* switch off GMACTPE and GMACRPE */
1302 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1303 regvalue &= ~((1 << 5) | (1 << 6));
1304 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1305
1306 /* write mac */
1307 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1308 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1309 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1310 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1311 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1312
1313 /* switch GMACTPE and GMACRPE back on */
1314 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1315 regvalue |= ((1 << 5) | (1 << 6));
1316 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1317
1318 spider_net_set_promisc(card);
1319
1320 /* look up, whether we have been successful */
1321 if (spider_net_get_mac_address(netdev))
1322 return -EADDRNOTAVAIL;
1323 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1324 return -EADDRNOTAVAIL;
1325
1326 return 0;
1327}
1328
1329/**
1330 * spider_net_enable_txdmac - enables a TX DMA controller
1331 * @card: card structure
1332 *
1333 * spider_net_enable_txdmac enables the TX DMA controller by setting the
1334 * descriptor chain tail address
1335 */
1336static void
1337spider_net_enable_txdmac(struct spider_net_card *card)
1338{
1339 /* assume chain is aligned correctly */
1340 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
1341 card->tx_chain.tail->bus_addr);
1342}
1343
1344/**
1345 * spider_net_handle_error_irq - handles errors raised by an interrupt
1346 * @card: card structure
1347 * @status_reg: interrupt status register 0 (GHIINT0STS)
1348 *
1349 * spider_net_handle_error_irq treats or ignores all error conditions
1350 * found when an interrupt is presented
1351 */
1352static void
1353spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1354{
1355 u32 error_reg1, error_reg2;
1356 u32 i;
1357 int show_error = 1;
1358
1359 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1360 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1361
1362 /* check GHIINT0STS ************************************/
1363 if (status_reg)
1364 for (i = 0; i < 32; i++)
1365 if (status_reg & (1<<i))
1366 switch (i)
1367 {
1368 /* let error_reg1 and error_reg2 evaluation decide, what to do
1369 case SPIDER_NET_PHYINT:
1370 case SPIDER_NET_GMAC2INT:
1371 case SPIDER_NET_GMAC1INT:
1372 case SPIDER_NET_GIPSINT:
1373 case SPIDER_NET_GFIFOINT:
1374 case SPIDER_NET_DMACINT:
1375 case SPIDER_NET_GSYSINT:
1376 break; */
1377
1378 case SPIDER_NET_GPWOPCMPINT:
1379 /* PHY write operation completed */
1380 show_error = 0;
1381 break;
1382 case SPIDER_NET_GPROPCMPINT:
1383 /* PHY read operation completed */
1384 /* we don't use semaphores, as we poll for the completion
1385 * of the read operation in spider_net_read_phy. Should take
1386 * about 50 us */
1387 show_error = 0;
1388 break;
1389 case SPIDER_NET_GPWFFINT:
1390 /* PHY command queue full */
1391 if (netif_msg_intr(card))
1392 pr_err("PHY write queue full\n");
1393 show_error = 0;
1394 break;
1395
1396 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1397 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1398 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1399
1400 case SPIDER_NET_GDTDEN0INT:
1401 /* someone has set TX_DMA_EN to 0 */
1402 show_error = 0;
1403 break;
1404
1405 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1406 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1407 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1408 case SPIDER_NET_GDADEN0INT:
1409 /* someone has set RX_DMA_EN to 0 */
1410 show_error = 0;
1411 break;
1412
1413 /* RX interrupts */
1414 case SPIDER_NET_GDDFDCINT:
1415 case SPIDER_NET_GDCFDCINT:
1416 case SPIDER_NET_GDBFDCINT:
1417 case SPIDER_NET_GDAFDCINT:
1418 /* case SPIDER_NET_GDNMINT: not used. print a message */
1419 /* case SPIDER_NET_GCNMINT: not used. print a message */
1420 /* case SPIDER_NET_GBNMINT: not used. print a message */
1421 /* case SPIDER_NET_GANMINT: not used. print a message */
1422 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1423 show_error = 0;
1424 break;
1425
1426 /* TX interrupts */
1427 case SPIDER_NET_GDTFDCINT:
1428 show_error = 0;
1429 break;
1430 case SPIDER_NET_GTTEDINT:
1431 show_error = 0;
1432 break;
1433 case SPIDER_NET_GDTDCEINT:
1434 /* chain end. If a descriptor should be sent, kick off
1435 * tx dma
1436 if (card->tx_chain.tail == card->tx_chain.head)
1437 spider_net_kick_tx_dma(card);
1438 show_error = 0; */
1439 break;
1440
1441 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1442 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1443 }
1444
1445 /* check GHIINT1STS ************************************/
1446 if (error_reg1)
1447 for (i = 0; i < 32; i++)
1448 if (error_reg1 & (1<<i))
1449 switch (i)
1450 {
1451 case SPIDER_NET_GTMFLLINT:
1452 if (netif_msg_intr(card))
1453 pr_err("Spider TX RAM full\n");
1454 show_error = 0;
1455 break;
1456 case SPIDER_NET_GRMFLLINT:
1457 if (netif_msg_intr(card))
1458 pr_err("Spider RX RAM full, incoming packets "
1459 "might be discarded !\n");
1460 netif_rx_schedule(card->netdev);
1461 spider_net_enable_rxchtails(card);
1462 spider_net_enable_rxdmac(card);
1463 break;
1464
1465 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1466 case SPIDER_NET_GDTINVDINT:
1467 /* allrighty. tx from previous descr ok */
1468 show_error = 0;
1469 break;
1470 /* case SPIDER_NET_GRFDFLLINT: print a message down there */
1471 /* case SPIDER_NET_GRFCFLLINT: print a message down there */
1472 /* case SPIDER_NET_GRFBFLLINT: print a message down there */
1473 /* case SPIDER_NET_GRFAFLLINT: print a message down there */
1474
1475 /* chain end */
1476 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1477 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1478 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1479 case SPIDER_NET_GDADCEINT:
1480 if (netif_msg_intr(card))
1481 pr_err("got descriptor chain end interrupt, "
1482 "restarting DMAC %c.\n",
1483 'D'+i-SPIDER_NET_GDDDCEINT);
1484 spider_net_refill_rx_chain(card);
1485 show_error = 0;
1486 break;
1487
1488 /* invalid descriptor */
1489 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1490 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1491 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1492 case SPIDER_NET_GDAINVDINT:
1493 /* could happen when rx chain is full */
1494 spider_net_refill_rx_chain(card);
1495 show_error = 0;
1496 break;
1497
1498 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1499 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1500 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1501 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1502 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1503 /* case SPIDER_NET_GDSERINT: problem, print a message */
1504 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1505 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1506 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1507 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1508 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1509 default:
1510 show_error = 1;
1511 break;
1512 }
1513
1514 /* check GHIINT2STS ************************************/
1515 if (error_reg2)
1516 for (i = 0; i < 32; i++)
1517 if (error_reg2 & (1<<i))
1518 switch (i)
1519 {
1520 /* there is nothing we can (want to) do at this time. Log a
1521 * message, we can switch on and off the specific values later on
1522 case SPIDER_NET_GPROPERINT:
1523 case SPIDER_NET_GMCTCRSNGINT:
1524 case SPIDER_NET_GMCTLCOLINT:
1525 case SPIDER_NET_GMCTTMOTINT:
1526 case SPIDER_NET_GMCRCAERINT:
1527 case SPIDER_NET_GMCRCALERINT:
1528 case SPIDER_NET_GMCRALNERINT:
1529 case SPIDER_NET_GMCROVRINT:
1530 case SPIDER_NET_GMCRRNTINT:
1531 case SPIDER_NET_GMCRRXERINT:
1532 case SPIDER_NET_GTITCSERINT:
1533 case SPIDER_NET_GTIFMTERINT:
1534 case SPIDER_NET_GTIPKTRVKINT:
1535 case SPIDER_NET_GTISPINGINT:
1536 case SPIDER_NET_GTISADNGINT:
1537 case SPIDER_NET_GTISPDNGINT:
1538 case SPIDER_NET_GRIFMTERINT:
1539 case SPIDER_NET_GRIPKTRVKINT:
1540 case SPIDER_NET_GRISPINGINT:
1541 case SPIDER_NET_GRISADNGINT:
1542 case SPIDER_NET_GRISPDNGINT:
1543 break;
1544 */
1545 default:
1546 break;
1547 }
1548
1549 if ((show_error) && (netif_msg_intr(card)))
1550 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1551 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1552 status_reg, error_reg1, error_reg2);
1553
1554 /* clear interrupt sources */
1555 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1556 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1557}
1558
1559/**
1560 * spider_net_interrupt - interrupt handler for spider_net
1561 * @irq: interupt number
1562 * @ptr: pointer to net_device
1563 * @regs: PU registers
1564 *
1565 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1566 * interrupt found raised by card.
1567 *
1568 * This is the interrupt handler, that turns off
1569 * interrupts for this device and makes the stack poll the driver
1570 */
1571static irqreturn_t
1572spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs)
1573{
1574 struct net_device *netdev = ptr;
1575 struct spider_net_card *card = netdev_priv(netdev);
1576 u32 status_reg;
1577
1578 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1579
1580 if (!status_reg)
1581 return IRQ_NONE;
1582
1583 if (status_reg & SPIDER_NET_TXINT)
1584 spider_net_release_tx_chain(card, 0);
1585
1586 if (status_reg & SPIDER_NET_RXINT ) {
1587 spider_net_rx_irq_off(card);
1588 netif_rx_schedule(netdev);
1589 }
1590
1591 /* we do this after rx and tx processing, as we want the tx chain
1592 * processed to see, whether we should restart tx dma processing */
1593 spider_net_handle_error_irq(card, status_reg);
1594
1595 /* clear interrupt sources */
1596 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1597
1598 return IRQ_HANDLED;
1599}
1600
1601#ifdef CONFIG_NET_POLL_CONTROLLER
1602/**
1603 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1604 * @netdev: interface device structure
1605 *
1606 * see Documentation/networking/netconsole.txt
1607 */
1608static void
1609spider_net_poll_controller(struct net_device *netdev)
1610{
1611 disable_irq(netdev->irq);
1612 spider_net_interrupt(netdev->irq, netdev, NULL);
1613 enable_irq(netdev->irq);
1614}
1615#endif /* CONFIG_NET_POLL_CONTROLLER */
1616
1617/**
1618 * spider_net_init_card - initializes the card
1619 * @card: card structure
1620 *
1621 * spider_net_init_card initializes the card so that other registers can
1622 * be used
1623 */
1624static void
1625spider_net_init_card(struct spider_net_card *card)
1626{
1627 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1628 SPIDER_NET_CKRCTRL_STOP_VALUE);
1629
1630 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1631 SPIDER_NET_CKRCTRL_RUN_VALUE);
1632}
1633
1634/**
1635 * spider_net_enable_card - enables the card by setting all kinds of regs
1636 * @card: card structure
1637 *
1638 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1639 */
1640static void
1641spider_net_enable_card(struct spider_net_card *card)
1642{
1643 int i;
1644 /* the following array consists of (register),(value) pairs
1645 * that are set in this function. A register of 0 ends the list */
1646 u32 regs[][2] = {
1647 { SPIDER_NET_GRESUMINTNUM, 0 },
1648 { SPIDER_NET_GREINTNUM, 0 },
1649
1650 /* set interrupt frame number registers */
1651 /* clear the single DMA engine registers first */
1652 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1653 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1654 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1655 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1656 /* then set, what we really need */
1657 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1658
1659 /* timer counter registers and stuff */
1660 { SPIDER_NET_GFREECNNUM, 0 },
1661 { SPIDER_NET_GONETIMENUM, 0 },
1662 { SPIDER_NET_GTOUTFRMNUM, 0 },
1663
1664 /* RX mode setting */
1665 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1666 /* TX mode setting */
1667 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1668 /* IPSEC mode setting */
1669 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1670
1671 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1672
1673 { SPIDER_NET_GMRWOLCTRL, 0 },
1674 { SPIDER_NET_GTESTMD, 0 },
1675
1676 { SPIDER_NET_GMACINTEN, 0 },
1677
1678 /* flow control stuff */
1679 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1680 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1681
1682 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1683 { 0, 0}
1684 };
1685
1686 i = 0;
1687 while (regs[i][0]) {
1688 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1689 i++;
1690 }
1691
1692 /* clear unicast filter table entries 1 to 14 */
1693 for (i = 1; i <= 14; i++) {
1694 spider_net_write_reg(card,
1695 SPIDER_NET_GMRUAFILnR + i * 8,
1696 0x00080000);
1697 spider_net_write_reg(card,
1698 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1699 0x00000000);
1700 }
1701
1702 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1703
1704 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1705
1706 /* set chain tail adress for RX chains and
1707 * enable DMA */
1708 spider_net_enable_rxchtails(card);
1709 spider_net_enable_rxdmac(card);
1710
1711 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1712
1713 /* set chain tail adress for TX chain */
1714 spider_net_enable_txdmac(card);
1715
1716 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1717 SPIDER_NET_LENLMT_VALUE);
1718 spider_net_write_reg(card, SPIDER_NET_GMACMODE,
1719 SPIDER_NET_MACMODE_VALUE);
1720 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1721 SPIDER_NET_OPMODE_VALUE);
1722
1723 /* set interrupt mask registers */
1724 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1725 SPIDER_NET_INT0_MASK_VALUE);
1726 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1727 SPIDER_NET_INT1_MASK_VALUE);
1728 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1729 SPIDER_NET_INT2_MASK_VALUE);
1730}
1731
1732/**
1733 * spider_net_open - called upon ifonfig up
1734 * @netdev: interface device structure
1735 *
1736 * returns 0 on success, <0 on failure
1737 *
1738 * spider_net_open allocates all the descriptors and memory needed for
1739 * operation, sets up multicast list and enables interrupts
1740 */
1741int
1742spider_net_open(struct net_device *netdev)
1743{
1744 struct spider_net_card *card = netdev_priv(netdev);
1745 int result;
1746
1747 result = -ENOMEM;
1748 if (spider_net_init_chain(card, &card->tx_chain,
1749 card->descr, tx_descriptors))
1750 goto alloc_tx_failed;
1751 if (spider_net_init_chain(card, &card->rx_chain,
1752 card->descr + tx_descriptors, rx_descriptors))
1753 goto alloc_rx_failed;
1754
1755 /* allocate rx skbs */
1756 if (spider_net_alloc_rx_skbs(card))
1757 goto alloc_skbs_failed;
1758
1759 spider_net_set_multi(netdev);
1760
1761 /* further enhancement: setup hw vlan, if needed */
1762
1763 result = -EBUSY;
1764 if (request_irq(netdev->irq, spider_net_interrupt,
1765 SA_SHIRQ, netdev->name, netdev))
1766 goto register_int_failed;
1767
1768 spider_net_enable_card(card);
1769
1770 netif_start_queue(netdev);
1771 netif_carrier_on(netdev);
1772 netif_poll_enable(netdev);
1773
1774 return 0;
1775
1776register_int_failed:
1777 spider_net_free_rx_chain_contents(card);
1778alloc_skbs_failed:
1779 spider_net_free_chain(card, &card->rx_chain);
1780alloc_rx_failed:
1781 spider_net_free_chain(card, &card->tx_chain);
1782alloc_tx_failed:
1783 return result;
1784}
1785
1786/**
1787 * spider_net_setup_phy - setup PHY
1788 * @card: card structure
1789 *
1790 * returns 0 on success, <0 on failure
1791 *
1792 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1793 * the PHY to 1000 Mbps
1794 **/
1795static int
1796spider_net_setup_phy(struct spider_net_card *card)
1797{
1798 struct mii_phy *phy = &card->phy;
1799
1800 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1801 SPIDER_NET_DMASEL_VALUE);
1802 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1803 SPIDER_NET_PHY_CTRL_VALUE);
1804 phy->mii_id = 1;
1805 phy->dev = card->netdev;
1806 phy->mdio_read = spider_net_read_phy;
1807 phy->mdio_write = spider_net_write_phy;
1808
1809 mii_phy_probe(phy, phy->mii_id);
1810
1811 if (phy->def->ops->setup_forced)
1812 phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
1813
1814 /* the following two writes could be moved to sungem_phy.c */
1815 /* enable fiber mode */
1816 spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x9020);
1817 /* LEDs active in both modes, autosense prio = fiber */
1818 spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x945f);
1819
1820 phy->def->ops->read_link(phy);
1821 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
1822 phy->speed, phy->duplex==1 ? "Full" : "Half");
1823
1824 return 0;
1825}
1826
1827/**
1828 * spider_net_download_firmware - loads firmware into the adapter
1829 * @card: card structure
1830 * @firmware: firmware pointer
1831 *
1832 * spider_net_download_firmware loads the firmware opened by
1833 * spider_net_init_firmware into the adapter.
1834 */
1835static void
1836spider_net_download_firmware(struct spider_net_card *card,
1837 const struct firmware *firmware)
1838{
1839 int sequencer, i;
1840 u32 *fw_ptr = (u32 *)firmware->data;
1841
1842 /* stop sequencers */
1843 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1844 SPIDER_NET_STOP_SEQ_VALUE);
1845
1846 for (sequencer = 0; sequencer < 6; sequencer++) {
1847 spider_net_write_reg(card,
1848 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1849 for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
1850 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1851 sequencer * 8, *fw_ptr);
1852 fw_ptr++;
1853 }
1854 }
1855
1856 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1857 SPIDER_NET_RUN_SEQ_VALUE);
1858}
1859
1860/**
1861 * spider_net_init_firmware - reads in firmware parts
1862 * @card: card structure
1863 *
1864 * Returns 0 on success, <0 on failure
1865 *
1866 * spider_net_init_firmware opens the sequencer firmware and does some basic
1867 * checks. This function opens and releases the firmware structure. A call
1868 * to download the firmware is performed before the release.
1869 *
1870 * Firmware format
1871 * ===============
1872 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1873 * the program for each sequencer. Use the command
1874 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1875 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1876 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1877 *
1878 * to generate spider_fw.bin, if you have sequencer programs with something
1879 * like the following contents for each sequencer:
1880 * <ONE LINE COMMENT>
1881 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1882 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1883 * ...
1884 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1885 */
1886static int
1887spider_net_init_firmware(struct spider_net_card *card)
1888{
1889 const struct firmware *firmware;
1890 int err = -EIO;
1891
1892 if (request_firmware(&firmware,
1893 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) < 0) {
1894 if (netif_msg_probe(card))
1895 pr_err("Couldn't read in sequencer data file %s.\n",
1896 SPIDER_NET_FIRMWARE_NAME);
1897 firmware = NULL;
1898 goto out;
1899 }
1900
1901 if (firmware->size != 6 * SPIDER_NET_FIRMWARE_LEN * sizeof(u32)) {
1902 if (netif_msg_probe(card))
1903 pr_err("Invalid size of sequencer data file %s.\n",
1904 SPIDER_NET_FIRMWARE_NAME);
1905 goto out;
1906 }
1907
1908 spider_net_download_firmware(card, firmware);
1909
1910 err = 0;
1911out:
1912 release_firmware(firmware);
1913
1914 return err;
1915}
1916
1917/**
1918 * spider_net_workaround_rxramfull - work around firmware bug
1919 * @card: card structure
1920 *
1921 * no return value
1922 **/
1923static void
1924spider_net_workaround_rxramfull(struct spider_net_card *card)
1925{
1926 int i, sequencer = 0;
1927
1928 /* cancel reset */
1929 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1930 SPIDER_NET_CKRCTRL_RUN_VALUE);
1931
1932 /* empty sequencer data */
1933 for (sequencer = 0; sequencer < 6; sequencer++) {
1934 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1935 sequencer * 8, 0x0);
1936 for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
1937 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1938 sequencer * 8, 0x0);
1939 }
1940 }
1941
1942 /* set sequencer operation */
1943 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
1944
1945 /* reset */
1946 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1947 SPIDER_NET_CKRCTRL_STOP_VALUE);
1948}
1949
1950/**
1951 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1952 * function (to be called not under interrupt status)
1953 * @data: data, is interface device structure
1954 *
1955 * called as task when tx hangs, resets interface (if interface is up)
1956 */
1957static void
1958spider_net_tx_timeout_task(void *data)
1959{
1960 struct net_device *netdev = data;
1961 struct spider_net_card *card = netdev_priv(netdev);
1962
1963 if (!(netdev->flags & IFF_UP))
1964 goto out;
1965
1966 netif_device_detach(netdev);
1967 spider_net_stop(netdev);
1968
1969 spider_net_workaround_rxramfull(card);
1970 spider_net_init_card(card);
1971
1972 if (spider_net_setup_phy(card))
1973 goto out;
1974 if (spider_net_init_firmware(card))
1975 goto out;
1976
1977 spider_net_open(netdev);
1978 spider_net_kick_tx_dma(card, card->tx_chain.head);
1979 netif_device_attach(netdev);
1980
1981out:
1982 atomic_dec(&card->tx_timeout_task_counter);
1983}
1984
1985/**
1986 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1987 * @netdev: interface device structure
1988 *
1989 * called, if tx hangs. Schedules a task that resets the interface
1990 */
1991static void
1992spider_net_tx_timeout(struct net_device *netdev)
1993{
1994 struct spider_net_card *card;
1995
1996 card = netdev_priv(netdev);
1997 atomic_inc(&card->tx_timeout_task_counter);
1998 if (netdev->flags & IFF_UP)
1999 schedule_work(&card->tx_timeout_task);
2000 else
2001 atomic_dec(&card->tx_timeout_task_counter);
2002}
2003
2004/**
2005 * spider_net_setup_netdev_ops - initialization of net_device operations
2006 * @netdev: net_device structure
2007 *
2008 * fills out function pointers in the net_device structure
2009 */
2010static void
2011spider_net_setup_netdev_ops(struct net_device *netdev)
2012{
2013 netdev->open = &spider_net_open;
2014 netdev->stop = &spider_net_stop;
2015 netdev->hard_start_xmit = &spider_net_xmit;
2016 netdev->get_stats = &spider_net_get_stats;
2017 netdev->set_multicast_list = &spider_net_set_multi;
2018 netdev->set_mac_address = &spider_net_set_mac;
2019 netdev->change_mtu = &spider_net_change_mtu;
2020 netdev->do_ioctl = &spider_net_do_ioctl;
2021 /* tx watchdog */
2022 netdev->tx_timeout = &spider_net_tx_timeout;
2023 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2024 /* NAPI */
2025 netdev->poll = &spider_net_poll;
2026 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2027 /* HW VLAN */
2028 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
2029 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
2030 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
2031#ifdef CONFIG_NET_POLL_CONTROLLER
2032 /* poll controller */
2033 netdev->poll_controller = &spider_net_poll_controller;
2034#endif /* CONFIG_NET_POLL_CONTROLLER */
2035 /* ethtool ops */
2036 netdev->ethtool_ops = &spider_net_ethtool_ops;
2037}
2038
2039/**
2040 * spider_net_setup_netdev - initialization of net_device
2041 * @card: card structure
2042 *
2043 * Returns 0 on success or <0 on failure
2044 *
2045 * spider_net_setup_netdev initializes the net_device structure
2046 **/
2047static int
2048spider_net_setup_netdev(struct spider_net_card *card)
2049{
2050 int result;
2051 struct net_device *netdev = card->netdev;
2052 struct device_node *dn;
2053 struct sockaddr addr;
2054 u8 *mac;
2055
2056 SET_MODULE_OWNER(netdev);
2057 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2058
2059 pci_set_drvdata(card->pdev, netdev);
2060 spin_lock_init(&card->intmask_lock);
2061 netdev->irq = card->pdev->irq;
2062
2063 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2064
2065 spider_net_setup_netdev_ops(netdev);
2066
2067 netdev->features = 0;
2068 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2069 * NETIF_F_HW_VLAN_FILTER */
2070
2071 netdev->irq = card->pdev->irq;
2072
2073 dn = pci_device_to_OF_node(card->pdev);
2074 if (!dn)
2075 return -EIO;
2076
2077 mac = (u8 *)get_property(dn, "local-mac-address", NULL);
2078 if (!mac)
2079 return -EIO;
2080 memcpy(addr.sa_data, mac, ETH_ALEN);
2081
2082 result = spider_net_set_mac(netdev, &addr);
2083 if ((result) && (netif_msg_probe(card)))
2084 pr_err("Failed to set MAC address: %i\n", result);
2085
2086 result = register_netdev(netdev);
2087 if (result) {
2088 if (netif_msg_probe(card))
2089 pr_err("Couldn't register net_device: %i\n",
2090 result);
2091 return result;
2092 }
2093
2094 if (netif_msg_probe(card))
2095 pr_info("Initialized device %s.\n", netdev->name);
2096
2097 return 0;
2098}
2099
2100/**
2101 * spider_net_alloc_card - allocates net_device and card structure
2102 *
2103 * returns the card structure or NULL in case of errors
2104 *
2105 * the card and net_device structures are linked to each other
2106 */
2107static struct spider_net_card *
2108spider_net_alloc_card(void)
2109{
2110 struct net_device *netdev;
2111 struct spider_net_card *card;
2112 size_t alloc_size;
2113
2114 alloc_size = sizeof (*card) +
2115 sizeof (struct spider_net_descr) * rx_descriptors +
2116 sizeof (struct spider_net_descr) * tx_descriptors;
2117 netdev = alloc_etherdev(alloc_size);
2118 if (!netdev)
2119 return NULL;
2120
2121 card = netdev_priv(netdev);
2122 card->netdev = netdev;
2123 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2124 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
2125 init_waitqueue_head(&card->waitq);
2126 atomic_set(&card->tx_timeout_task_counter, 0);
2127
2128 return card;
2129}
2130
2131/**
2132 * spider_net_undo_pci_setup - releases PCI ressources
2133 * @card: card structure
2134 *
2135 * spider_net_undo_pci_setup releases the mapped regions
2136 */
2137static void
2138spider_net_undo_pci_setup(struct spider_net_card *card)
2139{
2140 iounmap(card->regs);
2141 pci_release_regions(card->pdev);
2142}
2143
2144/**
2145 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2146 * @card: card structure
2147 * @pdev: PCI device
2148 *
2149 * Returns the card structure or NULL if any errors occur
2150 *
2151 * spider_net_setup_pci_dev initializes pdev and together with the
2152 * functions called in spider_net_open configures the device so that
2153 * data can be transferred over it
2154 * The net_device structure is attached to the card structure, if the
2155 * function returns without error.
2156 **/
2157static struct spider_net_card *
2158spider_net_setup_pci_dev(struct pci_dev *pdev)
2159{
2160 struct spider_net_card *card;
2161 unsigned long mmio_start, mmio_len;
2162
2163 if (pci_enable_device(pdev)) {
2164 pr_err("Couldn't enable PCI device\n");
2165 return NULL;
2166 }
2167
2168 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2169 pr_err("Couldn't find proper PCI device base address.\n");
2170 goto out_disable_dev;
2171 }
2172
2173 if (pci_request_regions(pdev, spider_net_driver_name)) {
2174 pr_err("Couldn't obtain PCI resources, aborting.\n");
2175 goto out_disable_dev;
2176 }
2177
2178 pci_set_master(pdev);
2179
2180 card = spider_net_alloc_card();
2181 if (!card) {
2182 pr_err("Couldn't allocate net_device structure, "
2183 "aborting.\n");
2184 goto out_release_regions;
2185 }
2186 card->pdev = pdev;
2187
2188 /* fetch base address and length of first resource */
2189 mmio_start = pci_resource_start(pdev, 0);
2190 mmio_len = pci_resource_len(pdev, 0);
2191
2192 card->netdev->mem_start = mmio_start;
2193 card->netdev->mem_end = mmio_start + mmio_len;
2194 card->regs = ioremap(mmio_start, mmio_len);
2195
2196 if (!card->regs) {
2197 pr_err("Couldn't obtain PCI resources, aborting.\n");
2198 goto out_release_regions;
2199 }
2200
2201 return card;
2202
2203out_release_regions:
2204 pci_release_regions(pdev);
2205out_disable_dev:
2206 pci_disable_device(pdev);
2207 pci_set_drvdata(pdev, NULL);
2208 return NULL;
2209}
2210
2211/**
2212 * spider_net_probe - initialization of a device
2213 * @pdev: PCI device
2214 * @ent: entry in the device id list
2215 *
2216 * Returns 0 on success, <0 on failure
2217 *
2218 * spider_net_probe initializes pdev and registers a net_device
2219 * structure for it. After that, the device can be ifconfig'ed up
2220 **/
2221static int __devinit
2222spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2223{
2224 int err = -EIO;
2225 struct spider_net_card *card;
2226
2227 card = spider_net_setup_pci_dev(pdev);
2228 if (!card)
2229 goto out;
2230
2231 spider_net_workaround_rxramfull(card);
2232 spider_net_init_card(card);
2233
2234 err = spider_net_setup_phy(card);
2235 if (err)
2236 goto out_undo_pci;
2237
2238 err = spider_net_init_firmware(card);
2239 if (err)
2240 goto out_undo_pci;
2241
2242 err = spider_net_setup_netdev(card);
2243 if (err)
2244 goto out_undo_pci;
2245
2246 return 0;
2247
2248out_undo_pci:
2249 spider_net_undo_pci_setup(card);
2250 free_netdev(card->netdev);
2251out:
2252 return err;
2253}
2254
2255/**
2256 * spider_net_remove - removal of a device
2257 * @pdev: PCI device
2258 *
2259 * Returns 0 on success, <0 on failure
2260 *
2261 * spider_net_remove is called to remove the device and unregisters the
2262 * net_device
2263 **/
2264static void __devexit
2265spider_net_remove(struct pci_dev *pdev)
2266{
2267 struct net_device *netdev;
2268 struct spider_net_card *card;
2269
2270 netdev = pci_get_drvdata(pdev);
2271 card = netdev_priv(netdev);
2272
2273 wait_event(card->waitq,
2274 atomic_read(&card->tx_timeout_task_counter) == 0);
2275
2276 unregister_netdev(netdev);
2277
2278 /* switch off card */
2279 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2280 SPIDER_NET_CKRCTRL_STOP_VALUE);
2281 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2282 SPIDER_NET_CKRCTRL_RUN_VALUE);
2283
2284 spider_net_undo_pci_setup(card);
2285 free_netdev(netdev);
2286}
2287
2288static struct pci_driver spider_net_driver = {
2289 .owner = THIS_MODULE,
2290 .name = spider_net_driver_name,
2291 .id_table = spider_net_pci_tbl,
2292 .probe = spider_net_probe,
2293 .remove = __devexit_p(spider_net_remove)
2294};
2295
2296/**
2297 * spider_net_init - init function when the driver is loaded
2298 *
2299 * spider_net_init registers the device driver
2300 */
2301static int __init spider_net_init(void)
2302{
2303 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2304 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2305 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2306 }
2307 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2308 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2309 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2310 }
2311 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2312 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2313 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2314 }
2315 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2316 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2317 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2318 }
2319
2320 return pci_register_driver(&spider_net_driver);
2321}
2322
2323/**
2324 * spider_net_cleanup - exit function when driver is unloaded
2325 *
2326 * spider_net_cleanup unregisters the device driver
2327 */
2328static void __exit spider_net_cleanup(void)
2329{
2330 pci_unregister_driver(&spider_net_driver);
2331}
2332
2333module_init(spider_net_init);
2334module_exit(spider_net_cleanup);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 23:40:27 -0500