2 * Network device driver for Cell Processor-Based Blade
4 * (C) Copyright IBM Corp. 2005
6 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
7 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
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)
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.
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.
24 #include <linux/compiler.h>
25 #include <linux/crc32.h>
26 #include <linux/delay.h>
27 #include <linux/etherdevice.h>
28 #include <linux/ethtool.h>
29 #include <linux/firmware.h>
30 #include <linux/if_vlan.h>
32 #include <linux/init.h>
33 #include <linux/ioport.h>
35 #include <linux/kernel.h>
36 #include <linux/mii.h>
37 #include <linux/module.h>
38 #include <linux/netdevice.h>
39 #include <linux/device.h>
40 #include <linux/pci.h>
41 #include <linux/skbuff.h>
42 #include <linux/slab.h>
43 #include <linux/tcp.h>
44 #include <linux/types.h>
45 #include <linux/vmalloc.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>
52 #include "spider_net.h"
54 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
55 "<Jens.Osterkamp@de.ibm.com>");
56 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(VERSION
);
60 static int rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_DEFAULT
;
61 static int tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_DEFAULT
;
63 module_param(rx_descriptors
, int, 0444);
64 module_param(tx_descriptors
, int, 0444);
66 MODULE_PARM_DESC(rx_descriptors
, "number of descriptors used " \
68 MODULE_PARM_DESC(tx_descriptors
, "number of descriptors used " \
71 char spider_net_driver_name
[] = "spidernet";
73 static struct pci_device_id spider_net_pci_tbl
[] = {
74 { PCI_VENDOR_ID_TOSHIBA_2
, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET
,
75 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0UL },
79 MODULE_DEVICE_TABLE(pci
, spider_net_pci_tbl
);
82 * spider_net_read_reg - reads an SMMIO register of a card
83 * @card: device structure
84 * @reg: register to read from
86 * returns the content of the specified SMMIO register.
89 spider_net_read_reg(struct spider_net_card
*card
, u32 reg
)
91 /* We use the powerpc specific variants instead of readl_be() because
92 * we know spidernet is not a real PCI device and we can thus avoid the
93 * performance hit caused by the PCI workarounds.
95 return in_be32(card
->regs
+ reg
);
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
105 spider_net_write_reg(struct spider_net_card
*card
, u32 reg
, u32 value
)
107 /* We use the powerpc specific variants instead of writel_be() because
108 * we know spidernet is not a real PCI device and we can thus avoid the
109 * performance hit caused by the PCI workarounds.
111 out_be32(card
->regs
+ reg
, value
);
114 /** spider_net_write_phy - write to phy register
115 * @netdev: adapter to be written to
118 * @val: value to be written to phy register
120 * spider_net_write_phy_register writes to an arbitrary PHY
121 * register via the spider GPCWOPCMD register. We assume the queue does
122 * not run full (not more than 15 commands outstanding).
125 spider_net_write_phy(struct net_device
*netdev
, int mii_id
,
128 struct spider_net_card
*card
= netdev_priv(netdev
);
131 writevalue
= ((u32
)mii_id
<< 21) |
132 ((u32
)reg
<< 16) | ((u32
)val
);
134 spider_net_write_reg(card
, SPIDER_NET_GPCWOPCMD
, writevalue
);
137 /** spider_net_read_phy - read from phy register
138 * @netdev: network device to be read from
142 * Returns value read from PHY register
144 * spider_net_write_phy reads from an arbitrary PHY
145 * register via the spider GPCROPCMD register
148 spider_net_read_phy(struct net_device
*netdev
, int mii_id
, int reg
)
150 struct spider_net_card
*card
= netdev_priv(netdev
);
153 readvalue
= ((u32
)mii_id
<< 21) | ((u32
)reg
<< 16);
154 spider_net_write_reg(card
, SPIDER_NET_GPCROPCMD
, readvalue
);
156 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
157 * interrupt, as we poll for the completion of the read operation
158 * in spider_net_read_phy. Should take about 50 us */
160 readvalue
= spider_net_read_reg(card
, SPIDER_NET_GPCROPCMD
);
161 } while (readvalue
& SPIDER_NET_GPREXEC
);
163 readvalue
&= SPIDER_NET_GPRDAT_MASK
;
169 * spider_net_rx_irq_off - switch off rx irq on this spider card
170 * @card: device structure
172 * switches off rx irq by masking them out in the GHIINTnMSK register
175 spider_net_rx_irq_off(struct spider_net_card
*card
)
179 regvalue
= SPIDER_NET_INT0_MASK_VALUE
& (~SPIDER_NET_RXINT
);
180 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
184 * spider_net_rx_irq_on - switch on rx irq on this spider card
185 * @card: device structure
187 * switches on rx irq by enabling them in the GHIINTnMSK register
190 spider_net_rx_irq_on(struct spider_net_card
*card
)
194 regvalue
= SPIDER_NET_INT0_MASK_VALUE
| SPIDER_NET_RXINT
;
195 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
199 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
200 * @card: card structure
202 * spider_net_set_promisc sets the unicast destination address filter and
203 * thus either allows for non-promisc mode or promisc mode
206 spider_net_set_promisc(struct spider_net_card
*card
)
209 struct net_device
*netdev
= card
->netdev
;
211 if (netdev
->flags
& IFF_PROMISC
) {
212 /* clear destination entry 0 */
213 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, 0);
214 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, 0);
215 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
216 SPIDER_NET_PROMISC_VALUE
);
218 macu
= netdev
->dev_addr
[0];
220 macu
|= netdev
->dev_addr
[1];
221 memcpy(&macl
, &netdev
->dev_addr
[2], sizeof(macl
));
223 macu
|= SPIDER_NET_UA_DESCR_VALUE
;
224 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, macu
);
225 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, macl
);
226 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
227 SPIDER_NET_NONPROMISC_VALUE
);
232 * spider_net_get_mac_address - read mac address from spider card
233 * @card: device structure
235 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
238 spider_net_get_mac_address(struct net_device
*netdev
)
240 struct spider_net_card
*card
= netdev_priv(netdev
);
243 macl
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACL
);
244 macu
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACU
);
246 netdev
->dev_addr
[0] = (macu
>> 24) & 0xff;
247 netdev
->dev_addr
[1] = (macu
>> 16) & 0xff;
248 netdev
->dev_addr
[2] = (macu
>> 8) & 0xff;
249 netdev
->dev_addr
[3] = macu
& 0xff;
250 netdev
->dev_addr
[4] = (macl
>> 8) & 0xff;
251 netdev
->dev_addr
[5] = macl
& 0xff;
253 if (!is_valid_ether_addr(&netdev
->dev_addr
[0]))
260 * spider_net_get_descr_status -- returns the status of a descriptor
261 * @descr: descriptor to look at
263 * returns the status as in the dmac_cmd_status field of the descriptor
266 spider_net_get_descr_status(struct spider_net_descr
*descr
)
268 return descr
->dmac_cmd_status
& SPIDER_NET_DESCR_IND_PROC_MASK
;
272 * spider_net_free_chain - free descriptor chain
273 * @card: card structure
274 * @chain: address of chain
278 spider_net_free_chain(struct spider_net_card
*card
,
279 struct spider_net_descr_chain
*chain
)
281 struct spider_net_descr
*descr
;
286 descr
->next_descr_addr
= 0;
288 } while (descr
!= chain
->ring
);
290 dma_free_coherent(&card
->pdev
->dev
, chain
->num_desc
,
291 chain
->ring
, chain
->dma_addr
);
295 * spider_net_init_chain - alloc and link descriptor chain
296 * @card: card structure
297 * @chain: address of chain
299 * We manage a circular list that mirrors the hardware structure,
300 * except that the hardware uses bus addresses.
302 * Returns 0 on success, <0 on failure
305 spider_net_init_chain(struct spider_net_card
*card
,
306 struct spider_net_descr_chain
*chain
)
309 struct spider_net_descr
*descr
;
313 alloc_size
= chain
->num_desc
* sizeof (struct spider_net_descr
);
315 chain
->ring
= dma_alloc_coherent(&card
->pdev
->dev
, alloc_size
,
316 &chain
->dma_addr
, GFP_KERNEL
);
322 memset(descr
, 0, alloc_size
);
324 /* Set up the hardware pointers in each descriptor */
325 buf
= chain
->dma_addr
;
326 for (i
=0; i
< chain
->num_desc
; i
++, descr
++) {
327 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
329 descr
->bus_addr
= buf
;
330 descr
->next_descr_addr
= 0;
331 descr
->next
= descr
+ 1;
332 descr
->prev
= descr
- 1;
334 buf
+= sizeof(struct spider_net_descr
);
336 /* do actual circular list */
337 (descr
-1)->next
= chain
->ring
;
338 chain
->ring
->prev
= descr
-1;
340 spin_lock_init(&chain
->lock
);
341 chain
->head
= chain
->ring
;
342 chain
->tail
= chain
->ring
;
347 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
348 * @card: card structure
350 * returns 0 on success, <0 on failure
353 spider_net_free_rx_chain_contents(struct spider_net_card
*card
)
355 struct spider_net_descr
*descr
;
357 descr
= card
->rx_chain
.head
;
360 dev_kfree_skb(descr
->skb
);
361 pci_unmap_single(card
->pdev
, descr
->buf_addr
,
362 SPIDER_NET_MAX_FRAME
,
363 PCI_DMA_BIDIRECTIONAL
);
366 } while (descr
!= card
->rx_chain
.head
);
370 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
371 * @card: card structure
372 * @descr: descriptor to re-init
374 * return 0 on succes, <0 on failure
376 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
377 * Activate the descriptor state-wise
380 spider_net_prepare_rx_descr(struct spider_net_card
*card
,
381 struct spider_net_descr
*descr
)
388 /* we need to round up the buffer size to a multiple of 128 */
389 bufsize
= (SPIDER_NET_MAX_FRAME
+ SPIDER_NET_RXBUF_ALIGN
- 1) &
390 (~(SPIDER_NET_RXBUF_ALIGN
- 1));
392 /* and we need to have it 128 byte aligned, therefore we allocate a
394 /* allocate an skb */
395 descr
->skb
= dev_alloc_skb(bufsize
+ SPIDER_NET_RXBUF_ALIGN
- 1);
397 if (netif_msg_rx_err(card
) && net_ratelimit())
398 pr_err("Not enough memory to allocate rx buffer\n");
399 card
->spider_stats
.alloc_rx_skb_error
++;
402 descr
->buf_size
= bufsize
;
403 descr
->result_size
= 0;
404 descr
->valid_size
= 0;
405 descr
->data_status
= 0;
406 descr
->data_error
= 0;
408 offset
= ((unsigned long)descr
->skb
->data
) &
409 (SPIDER_NET_RXBUF_ALIGN
- 1);
411 skb_reserve(descr
->skb
, SPIDER_NET_RXBUF_ALIGN
- offset
);
412 /* io-mmu-map the skb */
413 buf
= pci_map_single(card
->pdev
, descr
->skb
->data
,
414 SPIDER_NET_MAX_FRAME
, PCI_DMA_FROMDEVICE
);
415 descr
->buf_addr
= buf
;
416 if (pci_dma_mapping_error(buf
)) {
417 dev_kfree_skb_any(descr
->skb
);
418 if (netif_msg_rx_err(card
) && net_ratelimit())
419 pr_err("Could not iommu-map rx buffer\n");
420 card
->spider_stats
.rx_iommu_map_error
++;
421 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
423 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_CARDOWNED
|
424 SPIDER_NET_DMAC_NOINTR_COMPLETE
;
431 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
432 * @card: card structure
434 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
435 * chip by writing to the appropriate register. DMA is enabled in
436 * spider_net_enable_rxdmac.
439 spider_net_enable_rxchtails(struct spider_net_card
*card
)
441 /* assume chain is aligned correctly */
442 spider_net_write_reg(card
, SPIDER_NET_GDADCHA
,
443 card
->rx_chain
.tail
->bus_addr
);
447 * spider_net_enable_rxdmac - enables a receive DMA controller
448 * @card: card structure
450 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
451 * in the GDADMACCNTR register
454 spider_net_enable_rxdmac(struct spider_net_card
*card
)
457 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
458 SPIDER_NET_DMA_RX_VALUE
);
462 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
463 * @card: card structure
465 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
468 spider_net_refill_rx_chain(struct spider_net_card
*card
)
470 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
473 /* one context doing the refill (and a second context seeing that
474 * and omitting it) is ok. If called by NAPI, we'll be called again
475 * as spider_net_decode_one_descr is called several times. If some
476 * interrupt calls us, the NAPI is about to clean up anyway. */
477 if (!spin_trylock_irqsave(&chain
->lock
, flags
))
480 while (spider_net_get_descr_status(chain
->head
) ==
481 SPIDER_NET_DESCR_NOT_IN_USE
) {
482 if (spider_net_prepare_rx_descr(card
, chain
->head
))
484 chain
->head
= chain
->head
->next
;
487 spin_unlock_irqrestore(&chain
->lock
, flags
);
491 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
492 * @card: card structure
494 * returns 0 on success, <0 on failure
497 spider_net_alloc_rx_skbs(struct spider_net_card
*card
)
500 struct spider_net_descr_chain
*chain
;
504 chain
= &card
->rx_chain
;
505 /* put at least one buffer into the chain. if this fails,
506 * we've got a problem. if not, spider_net_refill_rx_chain
507 * will do the rest at the end of this function */
508 if (spider_net_prepare_rx_descr(card
, chain
->head
))
511 chain
->head
= chain
->head
->next
;
513 /* this will allocate the rest of the rx buffers; if not, it's
514 * business as usual later on */
515 spider_net_refill_rx_chain(card
);
516 spider_net_enable_rxdmac(card
);
520 spider_net_free_rx_chain_contents(card
);
525 * spider_net_get_multicast_hash - generates hash for multicast filter table
526 * @addr: multicast address
528 * returns the hash value.
530 * spider_net_get_multicast_hash calculates a hash value for a given multicast
531 * address, that is used to set the multicast filter tables
534 spider_net_get_multicast_hash(struct net_device
*netdev
, __u8
*addr
)
538 char addr_for_crc
[ETH_ALEN
] = { 0, };
541 for (i
= 0; i
< ETH_ALEN
* 8; i
++) {
542 bit
= (addr
[i
/ 8] >> (i
% 8)) & 1;
543 addr_for_crc
[ETH_ALEN
- 1 - i
/ 8] += bit
<< (7 - (i
% 8));
546 crc
= crc32_be(~0, addr_for_crc
, netdev
->addr_len
);
557 * spider_net_set_multi - sets multicast addresses and promisc flags
558 * @netdev: interface device structure
560 * spider_net_set_multi configures multicast addresses as needed for the
561 * netdev interface. It also sets up multicast, allmulti and promisc
562 * flags appropriately
565 spider_net_set_multi(struct net_device
*netdev
)
567 struct dev_mc_list
*mc
;
571 struct spider_net_card
*card
= netdev_priv(netdev
);
572 unsigned long bitmask
[SPIDER_NET_MULTICAST_HASHES
/ BITS_PER_LONG
] =
575 spider_net_set_promisc(card
);
577 if (netdev
->flags
& IFF_ALLMULTI
) {
578 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
; i
++) {
584 /* well, we know, what the broadcast hash value is: it's xfd
585 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
586 set_bit(0xfd, bitmask
);
588 for (mc
= netdev
->mc_list
; mc
; mc
= mc
->next
) {
589 hash
= spider_net_get_multicast_hash(netdev
, mc
->dmi_addr
);
590 set_bit(hash
, bitmask
);
594 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
/ 4; i
++) {
596 if (test_bit(i
* 4, bitmask
))
599 if (test_bit(i
* 4 + 1, bitmask
))
602 if (test_bit(i
* 4 + 2, bitmask
))
605 if (test_bit(i
* 4 + 3, bitmask
))
608 spider_net_write_reg(card
, SPIDER_NET_GMRMHFILnR
+ i
* 4, reg
);
613 * spider_net_disable_rxdmac - disables the receive DMA controller
614 * @card: card structure
616 * spider_net_disable_rxdmac terminates processing on the DMA controller by
617 * turing off DMA and issueing a force end
620 spider_net_disable_rxdmac(struct spider_net_card
*card
)
622 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
623 SPIDER_NET_DMA_RX_FEND_VALUE
);
627 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
628 * @card: card structure
629 * @descr: descriptor structure to fill out
630 * @skb: packet to use
632 * returns 0 on success, <0 on failure.
634 * fills out the descriptor structure with skb data and len. Copies data,
635 * if needed (32bit DMA!)
638 spider_net_prepare_tx_descr(struct spider_net_card
*card
,
641 struct spider_net_descr
*descr
;
645 buf
= pci_map_single(card
->pdev
, skb
->data
, skb
->len
, PCI_DMA_TODEVICE
);
646 if (pci_dma_mapping_error(buf
)) {
647 if (netif_msg_tx_err(card
) && net_ratelimit())
648 pr_err("could not iommu-map packet (%p, %i). "
649 "Dropping packet\n", skb
->data
, skb
->len
);
650 card
->spider_stats
.tx_iommu_map_error
++;
654 spin_lock_irqsave(&card
->tx_chain
.lock
, flags
);
655 descr
= card
->tx_chain
.head
;
656 card
->tx_chain
.head
= descr
->next
;
658 descr
->buf_addr
= buf
;
659 descr
->buf_size
= skb
->len
;
660 descr
->next_descr_addr
= 0;
662 descr
->data_status
= 0;
664 descr
->dmac_cmd_status
=
665 SPIDER_NET_DESCR_CARDOWNED
| SPIDER_NET_DMAC_NOCS
;
666 spin_unlock_irqrestore(&card
->tx_chain
.lock
, flags
);
668 if (skb
->protocol
== htons(ETH_P_IP
))
669 switch (skb
->nh
.iph
->protocol
) {
671 descr
->dmac_cmd_status
|= SPIDER_NET_DMAC_TCP
;
674 descr
->dmac_cmd_status
|= SPIDER_NET_DMAC_UDP
;
678 /* Chain the bus address, so that the DMA engine finds this descr. */
679 descr
->prev
->next_descr_addr
= descr
->bus_addr
;
681 card
->netdev
->trans_start
= jiffies
; /* set netdev watchdog timer */
686 spider_net_set_low_watermark(struct spider_net_card
*card
)
692 struct spider_net_descr
*descr
= card
->tx_chain
.tail
;
694 /* Measure the length of the queue. Measurement does not
695 * need to be precise -- does not need a lock. */
696 while (descr
!= card
->tx_chain
.head
) {
697 status
= descr
->dmac_cmd_status
& SPIDER_NET_DESCR_NOT_IN_USE
;
698 if (status
== SPIDER_NET_DESCR_NOT_IN_USE
)
704 /* If TX queue is short, don't even bother with interrupts */
705 if (cnt
< card
->tx_chain
.num_desc
/4)
708 /* Set low-watermark 3/4th's of the way into the queue. */
709 descr
= card
->tx_chain
.tail
;
714 /* Set the new watermark, clear the old watermark */
715 spin_lock_irqsave(&card
->tx_chain
.lock
, flags
);
716 descr
->dmac_cmd_status
|= SPIDER_NET_DESCR_TXDESFLG
;
717 if (card
->low_watermark
&& card
->low_watermark
!= descr
)
718 card
->low_watermark
->dmac_cmd_status
=
719 card
->low_watermark
->dmac_cmd_status
& ~SPIDER_NET_DESCR_TXDESFLG
;
720 card
->low_watermark
= descr
;
721 spin_unlock_irqrestore(&card
->tx_chain
.lock
, flags
);
726 * spider_net_release_tx_chain - processes sent tx descriptors
727 * @card: adapter structure
728 * @brutal: if set, don't care about whether descriptor seems to be in use
730 * returns 0 if the tx ring is empty, otherwise 1.
732 * spider_net_release_tx_chain releases the tx descriptors that spider has
733 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
734 * If some other context is calling this function, we return 1 so that we're
735 * scheduled again (if we were scheduled) and will not loose initiative.
738 spider_net_release_tx_chain(struct spider_net_card
*card
, int brutal
)
740 struct spider_net_descr_chain
*chain
= &card
->tx_chain
;
741 struct spider_net_descr
*descr
;
747 while (chain
->tail
!= chain
->head
) {
748 spin_lock_irqsave(&chain
->lock
, flags
);
751 status
= spider_net_get_descr_status(descr
);
753 case SPIDER_NET_DESCR_COMPLETE
:
754 card
->netdev_stats
.tx_packets
++;
755 card
->netdev_stats
.tx_bytes
+= descr
->skb
->len
;
758 case SPIDER_NET_DESCR_CARDOWNED
:
760 spin_unlock_irqrestore(&chain
->lock
, flags
);
764 /* fallthrough, if we release the descriptors
765 * brutally (then we don't care about
766 * SPIDER_NET_DESCR_CARDOWNED) */
768 case SPIDER_NET_DESCR_RESPONSE_ERROR
:
769 case SPIDER_NET_DESCR_PROTECTION_ERROR
:
770 case SPIDER_NET_DESCR_FORCE_END
:
771 if (netif_msg_tx_err(card
))
772 pr_err("%s: forcing end of tx descriptor "
773 "with status x%02x\n",
774 card
->netdev
->name
, status
);
775 card
->netdev_stats
.tx_errors
++;
779 card
->netdev_stats
.tx_dropped
++;
781 spin_unlock_irqrestore(&chain
->lock
, flags
);
786 chain
->tail
= descr
->next
;
787 descr
->dmac_cmd_status
|= SPIDER_NET_DESCR_NOT_IN_USE
;
789 buf_addr
= descr
->buf_addr
;
790 spin_unlock_irqrestore(&chain
->lock
, flags
);
794 pci_unmap_single(card
->pdev
, buf_addr
, skb
->len
,
803 * spider_net_kick_tx_dma - enables TX DMA processing
804 * @card: card structure
805 * @descr: descriptor address to enable TX processing at
807 * This routine will start the transmit DMA running if
808 * it is not already running. This routine ned only be
809 * called when queueing a new packet to an empty tx queue.
810 * Writes the current tx chain head as start address
811 * of the tx descriptor chain and enables the transmission
815 spider_net_kick_tx_dma(struct spider_net_card
*card
)
817 struct spider_net_descr
*descr
;
819 if (spider_net_read_reg(card
, SPIDER_NET_GDTDMACCNTR
) &
820 SPIDER_NET_TX_DMA_EN
)
823 descr
= card
->tx_chain
.tail
;
825 if (spider_net_get_descr_status(descr
) ==
826 SPIDER_NET_DESCR_CARDOWNED
) {
827 spider_net_write_reg(card
, SPIDER_NET_GDTDCHA
,
829 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
830 SPIDER_NET_DMA_TX_VALUE
);
833 if (descr
== card
->tx_chain
.head
)
839 mod_timer(&card
->tx_timer
, jiffies
+ SPIDER_NET_TX_TIMER
);
843 * spider_net_xmit - transmits a frame over the device
844 * @skb: packet to send out
845 * @netdev: interface device structure
847 * returns 0 on success, !0 on failure
850 spider_net_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
853 struct spider_net_card
*card
= netdev_priv(netdev
);
854 struct spider_net_descr_chain
*chain
= &card
->tx_chain
;
856 spider_net_release_tx_chain(card
, 0);
858 if ((chain
->head
->next
== chain
->tail
->prev
) ||
859 (spider_net_prepare_tx_descr(card
, skb
) != 0)) {
861 card
->netdev_stats
.tx_dropped
++;
862 netif_stop_queue(netdev
);
863 return NETDEV_TX_BUSY
;
866 cnt
= spider_net_set_low_watermark(card
);
868 spider_net_kick_tx_dma(card
);
873 * spider_net_cleanup_tx_ring - cleans up the TX ring
874 * @card: card structure
876 * spider_net_cleanup_tx_ring is called by either the tx_timer
877 * or from the NAPI polling routine.
878 * This routine releases resources associted with transmitted
879 * packets, including updating the queue tail pointer.
882 spider_net_cleanup_tx_ring(struct spider_net_card
*card
)
884 if ((spider_net_release_tx_chain(card
, 0) != 0) &&
885 (card
->netdev
->flags
& IFF_UP
)) {
886 spider_net_kick_tx_dma(card
);
887 netif_wake_queue(card
->netdev
);
892 * spider_net_do_ioctl - called for device ioctls
893 * @netdev: interface device structure
894 * @ifr: request parameter structure for ioctl
895 * @cmd: command code for ioctl
897 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
898 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
901 spider_net_do_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
910 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
911 * @descr: descriptor to process
912 * @card: card structure
914 * Fills out skb structure and passes the data to the stack.
915 * The descriptor state is not changed.
918 spider_net_pass_skb_up(struct spider_net_descr
*descr
,
919 struct spider_net_card
*card
)
922 struct net_device
*netdev
;
923 u32 data_status
, data_error
;
925 data_status
= descr
->data_status
;
926 data_error
= descr
->data_error
;
927 netdev
= card
->netdev
;
931 skb_put(skb
, descr
->valid_size
);
933 /* the card seems to add 2 bytes of junk in front
934 * of the ethernet frame */
935 #define SPIDER_MISALIGN 2
936 skb_pull(skb
, SPIDER_MISALIGN
);
937 skb
->protocol
= eth_type_trans(skb
, netdev
);
939 /* checksum offload */
940 if (card
->options
.rx_csum
) {
941 if ( ( (data_status
& SPIDER_NET_DATA_STATUS_CKSUM_MASK
) ==
942 SPIDER_NET_DATA_STATUS_CKSUM_MASK
) &&
943 !(data_error
& SPIDER_NET_DATA_ERR_CKSUM_MASK
))
944 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
946 skb
->ip_summed
= CHECKSUM_NONE
;
948 skb
->ip_summed
= CHECKSUM_NONE
;
950 if (data_status
& SPIDER_NET_VLAN_PACKET
) {
951 /* further enhancements: HW-accel VLAN
952 * vlan_hwaccel_receive_skb
956 /* pass skb up to stack */
957 netif_receive_skb(skb
);
959 /* update netdevice statistics */
960 card
->netdev_stats
.rx_packets
++;
961 card
->netdev_stats
.rx_bytes
+= skb
->len
;
965 * spider_net_decode_one_descr - processes an rx descriptor
966 * @card: card structure
968 * Returns 1 if a packet has been sent to the stack, otherwise 0
970 * Processes an rx descriptor by iommu-unmapping the data buffer and passing
971 * the packet up to the stack. This function is called in softirq
972 * context, e.g. either bottom half from interrupt or NAPI polling context
975 spider_net_decode_one_descr(struct spider_net_card
*card
)
977 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
978 struct spider_net_descr
*descr
= chain
->tail
;
981 status
= spider_net_get_descr_status(descr
);
983 /* Nothing in the descriptor, or ring must be empty */
984 if ((status
== SPIDER_NET_DESCR_CARDOWNED
) ||
985 (status
== SPIDER_NET_DESCR_NOT_IN_USE
))
988 /* descriptor definitively used -- move on tail */
989 chain
->tail
= descr
->next
;
991 /* unmap descriptor */
992 pci_unmap_single(card
->pdev
, descr
->buf_addr
,
993 SPIDER_NET_MAX_FRAME
, PCI_DMA_FROMDEVICE
);
995 if ( (status
== SPIDER_NET_DESCR_RESPONSE_ERROR
) ||
996 (status
== SPIDER_NET_DESCR_PROTECTION_ERROR
) ||
997 (status
== SPIDER_NET_DESCR_FORCE_END
) ) {
998 if (netif_msg_rx_err(card
))
999 pr_err("%s: dropping RX descriptor with state %d\n",
1000 card
->netdev
->name
, status
);
1001 card
->netdev_stats
.rx_dropped
++;
1005 if ( (status
!= SPIDER_NET_DESCR_COMPLETE
) &&
1006 (status
!= SPIDER_NET_DESCR_FRAME_END
) ) {
1007 if (netif_msg_rx_err(card
))
1008 pr_err("%s: RX descriptor with unkown state %d\n",
1009 card
->netdev
->name
, status
);
1010 card
->spider_stats
.rx_desc_unk_state
++;
1014 /* The cases we'll throw away the packet immediately */
1015 if (descr
->data_error
& SPIDER_NET_DESTROY_RX_FLAGS
) {
1016 if (netif_msg_rx_err(card
))
1017 pr_err("%s: error in received descriptor found, "
1018 "data_status=x%08x, data_error=x%08x\n",
1020 descr
->data_status
, descr
->data_error
);
1024 /* Ok, we've got a packet in descr */
1025 spider_net_pass_skb_up(descr
, card
);
1026 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
1030 dev_kfree_skb_irq(descr
->skb
);
1031 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
1036 * spider_net_poll - NAPI poll function called by the stack to return packets
1037 * @netdev: interface device structure
1038 * @budget: number of packets we can pass to the stack at most
1040 * returns 0 if no more packets available to the driver/stack. Returns 1,
1041 * if the quota is exceeded, but the driver has still packets.
1043 * spider_net_poll returns all packets from the rx descriptors to the stack
1044 * (using netif_receive_skb). If all/enough packets are up, the driver
1045 * reenables interrupts and returns 0. If not, 1 is returned.
1048 spider_net_poll(struct net_device
*netdev
, int *budget
)
1050 struct spider_net_card
*card
= netdev_priv(netdev
);
1051 int packets_to_do
, packets_done
= 0;
1052 int no_more_packets
= 0;
1054 spider_net_cleanup_tx_ring(card
);
1055 packets_to_do
= min(*budget
, netdev
->quota
);
1057 while (packets_to_do
) {
1058 if (spider_net_decode_one_descr(card
)) {
1062 /* no more packets for the stack */
1063 no_more_packets
= 1;
1068 netdev
->quota
-= packets_done
;
1069 *budget
-= packets_done
;
1070 spider_net_refill_rx_chain(card
);
1071 spider_net_enable_rxdmac(card
);
1073 /* if all packets are in the stack, enable interrupts and return 0 */
1074 /* if not, return 1 */
1075 if (no_more_packets
) {
1076 netif_rx_complete(netdev
);
1077 spider_net_rx_irq_on(card
);
1085 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1086 * @netdev: interface device structure
1087 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1090 spider_net_vlan_rx_reg(struct net_device
*netdev
, struct vlan_group
*grp
)
1092 /* further enhancement... yet to do */
1097 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1098 * @netdev: interface device structure
1099 * @vid: VLAN id to add
1102 spider_net_vlan_rx_add(struct net_device
*netdev
, uint16_t vid
)
1104 /* further enhancement... yet to do */
1105 /* add vid to card's VLAN filter table */
1110 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1111 * @netdev: interface device structure
1112 * @vid: VLAN id to remove
1115 spider_net_vlan_rx_kill(struct net_device
*netdev
, uint16_t vid
)
1117 /* further enhancement... yet to do */
1118 /* remove vid from card's VLAN filter table */
1122 * spider_net_get_stats - get interface statistics
1123 * @netdev: interface device structure
1125 * returns the interface statistics residing in the spider_net_card struct
1127 static struct net_device_stats
*
1128 spider_net_get_stats(struct net_device
*netdev
)
1130 struct spider_net_card
*card
= netdev_priv(netdev
);
1131 struct net_device_stats
*stats
= &card
->netdev_stats
;
1136 * spider_net_change_mtu - changes the MTU of an interface
1137 * @netdev: interface device structure
1138 * @new_mtu: new MTU value
1140 * returns 0 on success, <0 on failure
1143 spider_net_change_mtu(struct net_device
*netdev
, int new_mtu
)
1145 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1146 * and mtu is outbound only anyway */
1147 if ( (new_mtu
< SPIDER_NET_MIN_MTU
) ||
1148 (new_mtu
> SPIDER_NET_MAX_MTU
) )
1150 netdev
->mtu
= new_mtu
;
1155 * spider_net_set_mac - sets the MAC of an interface
1156 * @netdev: interface device structure
1157 * @ptr: pointer to new MAC address
1159 * Returns 0 on success, <0 on failure. Currently, we don't support this
1160 * and will always return EOPNOTSUPP.
1163 spider_net_set_mac(struct net_device
*netdev
, void *p
)
1165 struct spider_net_card
*card
= netdev_priv(netdev
);
1166 u32 macl
, macu
, regvalue
;
1167 struct sockaddr
*addr
= p
;
1169 if (!is_valid_ether_addr(addr
->sa_data
))
1170 return -EADDRNOTAVAIL
;
1172 /* switch off GMACTPE and GMACRPE */
1173 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1174 regvalue
&= ~((1 << 5) | (1 << 6));
1175 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1178 macu
= (addr
->sa_data
[0]<<24) + (addr
->sa_data
[1]<<16) +
1179 (addr
->sa_data
[2]<<8) + (addr
->sa_data
[3]);
1180 macl
= (addr
->sa_data
[4]<<8) + (addr
->sa_data
[5]);
1181 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACU
, macu
);
1182 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACL
, macl
);
1184 /* switch GMACTPE and GMACRPE back on */
1185 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1186 regvalue
|= ((1 << 5) | (1 << 6));
1187 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1189 spider_net_set_promisc(card
);
1191 /* look up, whether we have been successful */
1192 if (spider_net_get_mac_address(netdev
))
1193 return -EADDRNOTAVAIL
;
1194 if (memcmp(netdev
->dev_addr
,addr
->sa_data
,netdev
->addr_len
))
1195 return -EADDRNOTAVAIL
;
1201 * spider_net_handle_error_irq - handles errors raised by an interrupt
1202 * @card: card structure
1203 * @status_reg: interrupt status register 0 (GHIINT0STS)
1205 * spider_net_handle_error_irq treats or ignores all error conditions
1206 * found when an interrupt is presented
1209 spider_net_handle_error_irq(struct spider_net_card
*card
, u32 status_reg
)
1211 u32 error_reg1
, error_reg2
;
1215 error_reg1
= spider_net_read_reg(card
, SPIDER_NET_GHIINT1STS
);
1216 error_reg2
= spider_net_read_reg(card
, SPIDER_NET_GHIINT2STS
);
1218 /* check GHIINT0STS ************************************/
1220 for (i
= 0; i
< 32; i
++)
1221 if (status_reg
& (1<<i
))
1224 /* let error_reg1 and error_reg2 evaluation decide, what to do
1225 case SPIDER_NET_PHYINT:
1226 case SPIDER_NET_GMAC2INT:
1227 case SPIDER_NET_GMAC1INT:
1228 case SPIDER_NET_GFIFOINT:
1229 case SPIDER_NET_DMACINT:
1230 case SPIDER_NET_GSYSINT:
1233 case SPIDER_NET_GIPSINT
:
1237 case SPIDER_NET_GPWOPCMPINT
:
1238 /* PHY write operation completed */
1241 case SPIDER_NET_GPROPCMPINT
:
1242 /* PHY read operation completed */
1243 /* we don't use semaphores, as we poll for the completion
1244 * of the read operation in spider_net_read_phy. Should take
1248 case SPIDER_NET_GPWFFINT
:
1249 /* PHY command queue full */
1250 if (netif_msg_intr(card
))
1251 pr_err("PHY write queue full\n");
1255 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1256 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1257 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1259 case SPIDER_NET_GDTDEN0INT
:
1260 /* someone has set TX_DMA_EN to 0 */
1264 case SPIDER_NET_GDDDEN0INT
: /* fallthrough */
1265 case SPIDER_NET_GDCDEN0INT
: /* fallthrough */
1266 case SPIDER_NET_GDBDEN0INT
: /* fallthrough */
1267 case SPIDER_NET_GDADEN0INT
:
1268 /* someone has set RX_DMA_EN to 0 */
1273 case SPIDER_NET_GDDFDCINT
:
1274 case SPIDER_NET_GDCFDCINT
:
1275 case SPIDER_NET_GDBFDCINT
:
1276 case SPIDER_NET_GDAFDCINT
:
1277 /* case SPIDER_NET_GDNMINT: not used. print a message */
1278 /* case SPIDER_NET_GCNMINT: not used. print a message */
1279 /* case SPIDER_NET_GBNMINT: not used. print a message */
1280 /* case SPIDER_NET_GANMINT: not used. print a message */
1281 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1286 case SPIDER_NET_GDTFDCINT
:
1289 case SPIDER_NET_GTTEDINT
:
1292 case SPIDER_NET_GDTDCEINT
:
1293 /* chain end. If a descriptor should be sent, kick off
1295 if (card->tx_chain.tail != card->tx_chain.head)
1296 spider_net_kick_tx_dma(card);
1301 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1302 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1305 /* check GHIINT1STS ************************************/
1307 for (i
= 0; i
< 32; i
++)
1308 if (error_reg1
& (1<<i
))
1311 case SPIDER_NET_GTMFLLINT
:
1312 if (netif_msg_intr(card
) && net_ratelimit())
1313 pr_err("Spider TX RAM full\n");
1316 case SPIDER_NET_GRFDFLLINT
: /* fallthrough */
1317 case SPIDER_NET_GRFCFLLINT
: /* fallthrough */
1318 case SPIDER_NET_GRFBFLLINT
: /* fallthrough */
1319 case SPIDER_NET_GRFAFLLINT
: /* fallthrough */
1320 case SPIDER_NET_GRMFLLINT
:
1321 if (netif_msg_intr(card
) && net_ratelimit())
1322 pr_err("Spider RX RAM full, incoming packets "
1323 "might be discarded!\n");
1324 spider_net_rx_irq_off(card
);
1325 netif_rx_schedule(card
->netdev
);
1329 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1330 case SPIDER_NET_GDTINVDINT
:
1331 /* allrighty. tx from previous descr ok */
1336 case SPIDER_NET_GDDDCEINT
: /* fallthrough */
1337 case SPIDER_NET_GDCDCEINT
: /* fallthrough */
1338 case SPIDER_NET_GDBDCEINT
: /* fallthrough */
1339 case SPIDER_NET_GDADCEINT
:
1340 if (netif_msg_intr(card
) && net_ratelimit())
1341 pr_err("got descriptor chain end interrupt, "
1342 "restarting DMAC %c.\n",
1343 'D'-(i
-SPIDER_NET_GDDDCEINT
)/3);
1344 spider_net_refill_rx_chain(card
);
1345 spider_net_enable_rxdmac(card
);
1349 /* invalid descriptor */
1350 case SPIDER_NET_GDDINVDINT
: /* fallthrough */
1351 case SPIDER_NET_GDCINVDINT
: /* fallthrough */
1352 case SPIDER_NET_GDBINVDINT
: /* fallthrough */
1353 case SPIDER_NET_GDAINVDINT
:
1354 /* could happen when rx chain is full */
1355 spider_net_refill_rx_chain(card
);
1356 spider_net_enable_rxdmac(card
);
1360 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1361 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1362 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1363 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1364 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1365 /* case SPIDER_NET_GDSERINT: problem, print a message */
1366 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1367 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1368 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1369 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1370 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1376 /* check GHIINT2STS ************************************/
1378 for (i
= 0; i
< 32; i
++)
1379 if (error_reg2
& (1<<i
))
1382 /* there is nothing we can (want to) do at this time. Log a
1383 * message, we can switch on and off the specific values later on
1384 case SPIDER_NET_GPROPERINT:
1385 case SPIDER_NET_GMCTCRSNGINT:
1386 case SPIDER_NET_GMCTLCOLINT:
1387 case SPIDER_NET_GMCTTMOTINT:
1388 case SPIDER_NET_GMCRCAERINT:
1389 case SPIDER_NET_GMCRCALERINT:
1390 case SPIDER_NET_GMCRALNERINT:
1391 case SPIDER_NET_GMCROVRINT:
1392 case SPIDER_NET_GMCRRNTINT:
1393 case SPIDER_NET_GMCRRXERINT:
1394 case SPIDER_NET_GTITCSERINT:
1395 case SPIDER_NET_GTIFMTERINT:
1396 case SPIDER_NET_GTIPKTRVKINT:
1397 case SPIDER_NET_GTISPINGINT:
1398 case SPIDER_NET_GTISADNGINT:
1399 case SPIDER_NET_GTISPDNGINT:
1400 case SPIDER_NET_GRIFMTERINT:
1401 case SPIDER_NET_GRIPKTRVKINT:
1402 case SPIDER_NET_GRISPINGINT:
1403 case SPIDER_NET_GRISADNGINT:
1404 case SPIDER_NET_GRISPDNGINT:
1411 if ((show_error
) && (netif_msg_intr(card
)) && net_ratelimit())
1412 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
1413 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1415 status_reg
, error_reg1
, error_reg2
);
1417 /* clear interrupt sources */
1418 spider_net_write_reg(card
, SPIDER_NET_GHIINT1STS
, error_reg1
);
1419 spider_net_write_reg(card
, SPIDER_NET_GHIINT2STS
, error_reg2
);
1423 * spider_net_interrupt - interrupt handler for spider_net
1424 * @irq: interupt number
1425 * @ptr: pointer to net_device
1426 * @regs: PU registers
1428 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1429 * interrupt found raised by card.
1431 * This is the interrupt handler, that turns off
1432 * interrupts for this device and makes the stack poll the driver
1435 spider_net_interrupt(int irq
, void *ptr
)
1437 struct net_device
*netdev
= ptr
;
1438 struct spider_net_card
*card
= netdev_priv(netdev
);
1441 status_reg
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0STS
);
1446 if (status_reg
& SPIDER_NET_RXINT
) {
1447 spider_net_rx_irq_off(card
);
1448 netif_rx_schedule(netdev
);
1450 if (status_reg
& SPIDER_NET_TXINT
)
1451 netif_rx_schedule(netdev
);
1453 if (status_reg
& SPIDER_NET_ERRINT
)
1454 spider_net_handle_error_irq(card
, status_reg
);
1456 /* clear interrupt sources */
1457 spider_net_write_reg(card
, SPIDER_NET_GHIINT0STS
, status_reg
);
1462 #ifdef CONFIG_NET_POLL_CONTROLLER
1464 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1465 * @netdev: interface device structure
1467 * see Documentation/networking/netconsole.txt
1470 spider_net_poll_controller(struct net_device
*netdev
)
1472 disable_irq(netdev
->irq
);
1473 spider_net_interrupt(netdev
->irq
, netdev
);
1474 enable_irq(netdev
->irq
);
1476 #endif /* CONFIG_NET_POLL_CONTROLLER */
1479 * spider_net_init_card - initializes the card
1480 * @card: card structure
1482 * spider_net_init_card initializes the card so that other registers can
1486 spider_net_init_card(struct spider_net_card
*card
)
1488 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1489 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1491 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1492 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1496 * spider_net_enable_card - enables the card by setting all kinds of regs
1497 * @card: card structure
1499 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1502 spider_net_enable_card(struct spider_net_card
*card
)
1505 /* the following array consists of (register),(value) pairs
1506 * that are set in this function. A register of 0 ends the list */
1508 { SPIDER_NET_GRESUMINTNUM
, 0 },
1509 { SPIDER_NET_GREINTNUM
, 0 },
1511 /* set interrupt frame number registers */
1512 /* clear the single DMA engine registers first */
1513 { SPIDER_NET_GFAFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1514 { SPIDER_NET_GFBFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1515 { SPIDER_NET_GFCFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1516 { SPIDER_NET_GFDFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1517 /* then set, what we really need */
1518 { SPIDER_NET_GFFRMNUM
, SPIDER_NET_FRAMENUM_VALUE
},
1520 /* timer counter registers and stuff */
1521 { SPIDER_NET_GFREECNNUM
, 0 },
1522 { SPIDER_NET_GONETIMENUM
, 0 },
1523 { SPIDER_NET_GTOUTFRMNUM
, 0 },
1525 /* RX mode setting */
1526 { SPIDER_NET_GRXMDSET
, SPIDER_NET_RXMODE_VALUE
},
1527 /* TX mode setting */
1528 { SPIDER_NET_GTXMDSET
, SPIDER_NET_TXMODE_VALUE
},
1529 /* IPSEC mode setting */
1530 { SPIDER_NET_GIPSECINIT
, SPIDER_NET_IPSECINIT_VALUE
},
1532 { SPIDER_NET_GFTRESTRT
, SPIDER_NET_RESTART_VALUE
},
1534 { SPIDER_NET_GMRWOLCTRL
, 0 },
1535 { SPIDER_NET_GTESTMD
, 0x10000000 },
1536 { SPIDER_NET_GTTQMSK
, 0x00400040 },
1538 { SPIDER_NET_GMACINTEN
, 0 },
1540 /* flow control stuff */
1541 { SPIDER_NET_GMACAPAUSE
, SPIDER_NET_MACAPAUSE_VALUE
},
1542 { SPIDER_NET_GMACTXPAUSE
, SPIDER_NET_TXPAUSE_VALUE
},
1544 { SPIDER_NET_GMACBSTLMT
, SPIDER_NET_BURSTLMT_VALUE
},
1549 while (regs
[i
][0]) {
1550 spider_net_write_reg(card
, regs
[i
][0], regs
[i
][1]);
1554 /* clear unicast filter table entries 1 to 14 */
1555 for (i
= 1; i
<= 14; i
++) {
1556 spider_net_write_reg(card
,
1557 SPIDER_NET_GMRUAFILnR
+ i
* 8,
1559 spider_net_write_reg(card
,
1560 SPIDER_NET_GMRUAFILnR
+ i
* 8 + 4,
1564 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
, 0x08080000);
1566 spider_net_write_reg(card
, SPIDER_NET_ECMODE
, SPIDER_NET_ECMODE_VALUE
);
1568 /* set chain tail adress for RX chains and
1570 spider_net_enable_rxchtails(card
);
1571 spider_net_enable_rxdmac(card
);
1573 spider_net_write_reg(card
, SPIDER_NET_GRXDMAEN
, SPIDER_NET_WOL_VALUE
);
1575 spider_net_write_reg(card
, SPIDER_NET_GMACLENLMT
,
1576 SPIDER_NET_LENLMT_VALUE
);
1577 spider_net_write_reg(card
, SPIDER_NET_GMACMODE
,
1578 SPIDER_NET_MACMODE_VALUE
);
1579 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
,
1580 SPIDER_NET_OPMODE_VALUE
);
1582 /* set interrupt mask registers */
1583 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
,
1584 SPIDER_NET_INT0_MASK_VALUE
);
1585 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
,
1586 SPIDER_NET_INT1_MASK_VALUE
);
1587 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
,
1588 SPIDER_NET_INT2_MASK_VALUE
);
1590 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
1591 SPIDER_NET_GDTBSTA
);
1595 * spider_net_open - called upon ifonfig up
1596 * @netdev: interface device structure
1598 * returns 0 on success, <0 on failure
1600 * spider_net_open allocates all the descriptors and memory needed for
1601 * operation, sets up multicast list and enables interrupts
1604 spider_net_open(struct net_device
*netdev
)
1606 struct spider_net_card
*card
= netdev_priv(netdev
);
1607 struct spider_net_descr
*descr
;
1610 result
= spider_net_init_chain(card
, &card
->tx_chain
);
1612 goto alloc_tx_failed
;
1613 card
->low_watermark
= NULL
;
1615 result
= spider_net_init_chain(card
, &card
->rx_chain
);
1617 goto alloc_rx_failed
;
1619 /* Make a ring of of bus addresses */
1620 descr
= card
->rx_chain
.ring
;
1622 descr
->next_descr_addr
= descr
->next
->bus_addr
;
1623 descr
= descr
->next
;
1624 } while (descr
!= card
->rx_chain
.ring
);
1626 /* Allocate rx skbs */
1627 if (spider_net_alloc_rx_skbs(card
))
1628 goto alloc_skbs_failed
;
1630 spider_net_set_multi(netdev
);
1632 /* further enhancement: setup hw vlan, if needed */
1635 if (request_irq(netdev
->irq
, spider_net_interrupt
,
1636 IRQF_SHARED
, netdev
->name
, netdev
))
1637 goto register_int_failed
;
1639 spider_net_enable_card(card
);
1641 netif_start_queue(netdev
);
1642 netif_carrier_on(netdev
);
1643 netif_poll_enable(netdev
);
1647 register_int_failed
:
1648 spider_net_free_rx_chain_contents(card
);
1650 spider_net_free_chain(card
, &card
->rx_chain
);
1652 spider_net_free_chain(card
, &card
->tx_chain
);
1658 * spider_net_setup_phy - setup PHY
1659 * @card: card structure
1661 * returns 0 on success, <0 on failure
1663 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1664 * the PHY to 1000 Mbps
1667 spider_net_setup_phy(struct spider_net_card
*card
)
1669 struct mii_phy
*phy
= &card
->phy
;
1671 spider_net_write_reg(card
, SPIDER_NET_GDTDMASEL
,
1672 SPIDER_NET_DMASEL_VALUE
);
1673 spider_net_write_reg(card
, SPIDER_NET_GPCCTRL
,
1674 SPIDER_NET_PHY_CTRL_VALUE
);
1676 phy
->dev
= card
->netdev
;
1677 phy
->mdio_read
= spider_net_read_phy
;
1678 phy
->mdio_write
= spider_net_write_phy
;
1680 mii_phy_probe(phy
, phy
->mii_id
);
1682 if (phy
->def
->ops
->setup_forced
)
1683 phy
->def
->ops
->setup_forced(phy
, SPEED_1000
, DUPLEX_FULL
);
1685 phy
->def
->ops
->enable_fiber(phy
);
1687 phy
->def
->ops
->read_link(phy
);
1688 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy
->def
->name
,
1689 phy
->speed
, phy
->duplex
==1 ? "Full" : "Half");
1695 * spider_net_download_firmware - loads firmware into the adapter
1696 * @card: card structure
1697 * @firmware_ptr: pointer to firmware data
1699 * spider_net_download_firmware loads the firmware data into the
1700 * adapter. It assumes the length etc. to be allright.
1703 spider_net_download_firmware(struct spider_net_card
*card
,
1704 const void *firmware_ptr
)
1707 const u32
*fw_ptr
= firmware_ptr
;
1709 /* stop sequencers */
1710 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1711 SPIDER_NET_STOP_SEQ_VALUE
);
1713 for (sequencer
= 0; sequencer
< SPIDER_NET_FIRMWARE_SEQS
;
1715 spider_net_write_reg(card
,
1716 SPIDER_NET_GSnPRGADR
+ sequencer
* 8, 0);
1717 for (i
= 0; i
< SPIDER_NET_FIRMWARE_SEQWORDS
; i
++) {
1718 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1719 sequencer
* 8, *fw_ptr
);
1724 if (spider_net_read_reg(card
, SPIDER_NET_GSINIT
))
1727 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1728 SPIDER_NET_RUN_SEQ_VALUE
);
1734 * spider_net_init_firmware - reads in firmware parts
1735 * @card: card structure
1737 * Returns 0 on success, <0 on failure
1739 * spider_net_init_firmware opens the sequencer firmware and does some basic
1740 * checks. This function opens and releases the firmware structure. A call
1741 * to download the firmware is performed before the release.
1745 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1746 * the program for each sequencer. Use the command
1747 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1748 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1749 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1751 * to generate spider_fw.bin, if you have sequencer programs with something
1752 * like the following contents for each sequencer:
1753 * <ONE LINE COMMENT>
1754 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1755 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1757 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1760 spider_net_init_firmware(struct spider_net_card
*card
)
1762 struct firmware
*firmware
= NULL
;
1763 struct device_node
*dn
;
1764 const u8
*fw_prop
= NULL
;
1768 if (request_firmware((const struct firmware
**)&firmware
,
1769 SPIDER_NET_FIRMWARE_NAME
, &card
->pdev
->dev
) == 0) {
1770 if ( (firmware
->size
!= SPIDER_NET_FIRMWARE_LEN
) &&
1771 netif_msg_probe(card
) ) {
1772 pr_err("Incorrect size of spidernet firmware in " \
1773 "filesystem. Looking in host firmware...\n");
1776 err
= spider_net_download_firmware(card
, firmware
->data
);
1778 release_firmware(firmware
);
1786 dn
= pci_device_to_OF_node(card
->pdev
);
1790 fw_prop
= get_property(dn
, "firmware", &fw_size
);
1794 if ( (fw_size
!= SPIDER_NET_FIRMWARE_LEN
) &&
1795 netif_msg_probe(card
) ) {
1796 pr_err("Incorrect size of spidernet firmware in " \
1801 err
= spider_net_download_firmware(card
, fw_prop
);
1806 if (netif_msg_probe(card
))
1807 pr_err("Couldn't find spidernet firmware in filesystem " \
1808 "or host firmware\n");
1813 * spider_net_workaround_rxramfull - work around firmware bug
1814 * @card: card structure
1819 spider_net_workaround_rxramfull(struct spider_net_card
*card
)
1821 int i
, sequencer
= 0;
1824 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1825 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1827 /* empty sequencer data */
1828 for (sequencer
= 0; sequencer
< SPIDER_NET_FIRMWARE_SEQS
;
1830 spider_net_write_reg(card
, SPIDER_NET_GSnPRGADR
+
1831 sequencer
* 8, 0x0);
1832 for (i
= 0; i
< SPIDER_NET_FIRMWARE_SEQWORDS
; i
++) {
1833 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1834 sequencer
* 8, 0x0);
1838 /* set sequencer operation */
1839 spider_net_write_reg(card
, SPIDER_NET_GSINIT
, 0x000000fe);
1842 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1843 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1847 * spider_net_stop - called upon ifconfig down
1848 * @netdev: interface device structure
1853 spider_net_stop(struct net_device
*netdev
)
1855 struct spider_net_card
*card
= netdev_priv(netdev
);
1857 netif_poll_disable(netdev
);
1858 netif_carrier_off(netdev
);
1859 netif_stop_queue(netdev
);
1860 del_timer_sync(&card
->tx_timer
);
1862 /* disable/mask all interrupts */
1863 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, 0);
1864 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
, 0);
1865 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
, 0);
1867 /* free_irq(netdev->irq, netdev);*/
1868 free_irq(to_pci_dev(netdev
->class_dev
.dev
)->irq
, netdev
);
1870 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
1871 SPIDER_NET_DMA_TX_FEND_VALUE
);
1873 /* turn off DMA, force end */
1874 spider_net_disable_rxdmac(card
);
1876 /* release chains */
1877 spider_net_release_tx_chain(card
, 1);
1878 spider_net_free_rx_chain_contents(card
);
1880 spider_net_free_rx_chain_contents(card
);
1882 spider_net_free_chain(card
, &card
->tx_chain
);
1883 spider_net_free_chain(card
, &card
->rx_chain
);
1889 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1890 * function (to be called not under interrupt status)
1891 * @data: data, is interface device structure
1893 * called as task when tx hangs, resets interface (if interface is up)
1896 spider_net_tx_timeout_task(struct work_struct
*work
)
1898 struct spider_net_card
*card
=
1899 container_of(work
, struct spider_net_card
, tx_timeout_task
);
1900 struct net_device
*netdev
= card
->netdev
;
1902 if (!(netdev
->flags
& IFF_UP
))
1905 netif_device_detach(netdev
);
1906 spider_net_stop(netdev
);
1908 spider_net_workaround_rxramfull(card
);
1909 spider_net_init_card(card
);
1911 if (spider_net_setup_phy(card
))
1913 if (spider_net_init_firmware(card
))
1916 spider_net_open(netdev
);
1917 spider_net_kick_tx_dma(card
);
1918 netif_device_attach(netdev
);
1921 atomic_dec(&card
->tx_timeout_task_counter
);
1925 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1926 * @netdev: interface device structure
1928 * called, if tx hangs. Schedules a task that resets the interface
1931 spider_net_tx_timeout(struct net_device
*netdev
)
1933 struct spider_net_card
*card
;
1935 card
= netdev_priv(netdev
);
1936 atomic_inc(&card
->tx_timeout_task_counter
);
1937 if (netdev
->flags
& IFF_UP
)
1938 schedule_work(&card
->tx_timeout_task
);
1940 atomic_dec(&card
->tx_timeout_task_counter
);
1941 card
->spider_stats
.tx_timeouts
++;
1945 * spider_net_setup_netdev_ops - initialization of net_device operations
1946 * @netdev: net_device structure
1948 * fills out function pointers in the net_device structure
1951 spider_net_setup_netdev_ops(struct net_device
*netdev
)
1953 netdev
->open
= &spider_net_open
;
1954 netdev
->stop
= &spider_net_stop
;
1955 netdev
->hard_start_xmit
= &spider_net_xmit
;
1956 netdev
->get_stats
= &spider_net_get_stats
;
1957 netdev
->set_multicast_list
= &spider_net_set_multi
;
1958 netdev
->set_mac_address
= &spider_net_set_mac
;
1959 netdev
->change_mtu
= &spider_net_change_mtu
;
1960 netdev
->do_ioctl
= &spider_net_do_ioctl
;
1962 netdev
->tx_timeout
= &spider_net_tx_timeout
;
1963 netdev
->watchdog_timeo
= SPIDER_NET_WATCHDOG_TIMEOUT
;
1965 netdev
->poll
= &spider_net_poll
;
1966 netdev
->weight
= SPIDER_NET_NAPI_WEIGHT
;
1968 netdev
->vlan_rx_register
= &spider_net_vlan_rx_reg
;
1969 netdev
->vlan_rx_add_vid
= &spider_net_vlan_rx_add
;
1970 netdev
->vlan_rx_kill_vid
= &spider_net_vlan_rx_kill
;
1971 #ifdef CONFIG_NET_POLL_CONTROLLER
1972 /* poll controller */
1973 netdev
->poll_controller
= &spider_net_poll_controller
;
1974 #endif /* CONFIG_NET_POLL_CONTROLLER */
1976 netdev
->ethtool_ops
= &spider_net_ethtool_ops
;
1980 * spider_net_setup_netdev - initialization of net_device
1981 * @card: card structure
1983 * Returns 0 on success or <0 on failure
1985 * spider_net_setup_netdev initializes the net_device structure
1988 spider_net_setup_netdev(struct spider_net_card
*card
)
1991 struct net_device
*netdev
= card
->netdev
;
1992 struct device_node
*dn
;
1993 struct sockaddr addr
;
1996 SET_MODULE_OWNER(netdev
);
1997 SET_NETDEV_DEV(netdev
, &card
->pdev
->dev
);
1999 pci_set_drvdata(card
->pdev
, netdev
);
2001 init_timer(&card
->tx_timer
);
2002 card
->tx_timer
.function
=
2003 (void (*)(unsigned long)) spider_net_cleanup_tx_ring
;
2004 card
->tx_timer
.data
= (unsigned long) card
;
2005 netdev
->irq
= card
->pdev
->irq
;
2007 card
->options
.rx_csum
= SPIDER_NET_RX_CSUM_DEFAULT
;
2009 card
->tx_chain
.num_desc
= tx_descriptors
;
2010 card
->rx_chain
.num_desc
= rx_descriptors
;
2012 spider_net_setup_netdev_ops(netdev
);
2014 netdev
->features
= NETIF_F_HW_CSUM
| NETIF_F_LLTX
;
2015 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2016 * NETIF_F_HW_VLAN_FILTER */
2018 netdev
->irq
= card
->pdev
->irq
;
2020 dn
= pci_device_to_OF_node(card
->pdev
);
2024 mac
= get_property(dn
, "local-mac-address", NULL
);
2027 memcpy(addr
.sa_data
, mac
, ETH_ALEN
);
2029 result
= spider_net_set_mac(netdev
, &addr
);
2030 if ((result
) && (netif_msg_probe(card
)))
2031 pr_err("Failed to set MAC address: %i\n", result
);
2033 result
= register_netdev(netdev
);
2035 if (netif_msg_probe(card
))
2036 pr_err("Couldn't register net_device: %i\n",
2041 if (netif_msg_probe(card
))
2042 pr_info("Initialized device %s.\n", netdev
->name
);
2048 * spider_net_alloc_card - allocates net_device and card structure
2050 * returns the card structure or NULL in case of errors
2052 * the card and net_device structures are linked to each other
2054 static struct spider_net_card
*
2055 spider_net_alloc_card(void)
2057 struct net_device
*netdev
;
2058 struct spider_net_card
*card
;
2060 netdev
= alloc_etherdev(sizeof(struct spider_net_card
));
2064 card
= netdev_priv(netdev
);
2065 card
->netdev
= netdev
;
2066 card
->msg_enable
= SPIDER_NET_DEFAULT_MSG
;
2067 INIT_WORK(&card
->tx_timeout_task
, spider_net_tx_timeout_task
);
2068 init_waitqueue_head(&card
->waitq
);
2069 atomic_set(&card
->tx_timeout_task_counter
, 0);
2075 * spider_net_undo_pci_setup - releases PCI ressources
2076 * @card: card structure
2078 * spider_net_undo_pci_setup releases the mapped regions
2081 spider_net_undo_pci_setup(struct spider_net_card
*card
)
2083 iounmap(card
->regs
);
2084 pci_release_regions(card
->pdev
);
2088 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2089 * @card: card structure
2092 * Returns the card structure or NULL if any errors occur
2094 * spider_net_setup_pci_dev initializes pdev and together with the
2095 * functions called in spider_net_open configures the device so that
2096 * data can be transferred over it
2097 * The net_device structure is attached to the card structure, if the
2098 * function returns without error.
2100 static struct spider_net_card
*
2101 spider_net_setup_pci_dev(struct pci_dev
*pdev
)
2103 struct spider_net_card
*card
;
2104 unsigned long mmio_start
, mmio_len
;
2106 if (pci_enable_device(pdev
)) {
2107 pr_err("Couldn't enable PCI device\n");
2111 if (!(pci_resource_flags(pdev
, 0) & IORESOURCE_MEM
)) {
2112 pr_err("Couldn't find proper PCI device base address.\n");
2113 goto out_disable_dev
;
2116 if (pci_request_regions(pdev
, spider_net_driver_name
)) {
2117 pr_err("Couldn't obtain PCI resources, aborting.\n");
2118 goto out_disable_dev
;
2121 pci_set_master(pdev
);
2123 card
= spider_net_alloc_card();
2125 pr_err("Couldn't allocate net_device structure, "
2127 goto out_release_regions
;
2131 /* fetch base address and length of first resource */
2132 mmio_start
= pci_resource_start(pdev
, 0);
2133 mmio_len
= pci_resource_len(pdev
, 0);
2135 card
->netdev
->mem_start
= mmio_start
;
2136 card
->netdev
->mem_end
= mmio_start
+ mmio_len
;
2137 card
->regs
= ioremap(mmio_start
, mmio_len
);
2140 pr_err("Couldn't obtain PCI resources, aborting.\n");
2141 goto out_release_regions
;
2146 out_release_regions
:
2147 pci_release_regions(pdev
);
2149 pci_disable_device(pdev
);
2150 pci_set_drvdata(pdev
, NULL
);
2155 * spider_net_probe - initialization of a device
2157 * @ent: entry in the device id list
2159 * Returns 0 on success, <0 on failure
2161 * spider_net_probe initializes pdev and registers a net_device
2162 * structure for it. After that, the device can be ifconfig'ed up
2164 static int __devinit
2165 spider_net_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2168 struct spider_net_card
*card
;
2170 card
= spider_net_setup_pci_dev(pdev
);
2174 spider_net_workaround_rxramfull(card
);
2175 spider_net_init_card(card
);
2177 err
= spider_net_setup_phy(card
);
2181 err
= spider_net_init_firmware(card
);
2185 err
= spider_net_setup_netdev(card
);
2192 spider_net_undo_pci_setup(card
);
2193 free_netdev(card
->netdev
);
2199 * spider_net_remove - removal of a device
2202 * Returns 0 on success, <0 on failure
2204 * spider_net_remove is called to remove the device and unregisters the
2207 static void __devexit
2208 spider_net_remove(struct pci_dev
*pdev
)
2210 struct net_device
*netdev
;
2211 struct spider_net_card
*card
;
2213 netdev
= pci_get_drvdata(pdev
);
2214 card
= netdev_priv(netdev
);
2216 wait_event(card
->waitq
,
2217 atomic_read(&card
->tx_timeout_task_counter
) == 0);
2219 unregister_netdev(netdev
);
2221 /* switch off card */
2222 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2223 SPIDER_NET_CKRCTRL_STOP_VALUE
);
2224 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2225 SPIDER_NET_CKRCTRL_RUN_VALUE
);
2227 spider_net_undo_pci_setup(card
);
2228 free_netdev(netdev
);
2231 static struct pci_driver spider_net_driver
= {
2232 .name
= spider_net_driver_name
,
2233 .id_table
= spider_net_pci_tbl
,
2234 .probe
= spider_net_probe
,
2235 .remove
= __devexit_p(spider_net_remove
)
2239 * spider_net_init - init function when the driver is loaded
2241 * spider_net_init registers the device driver
2243 static int __init
spider_net_init(void)
2245 printk(KERN_INFO
"Spidernet version %s.\n", VERSION
);
2247 if (rx_descriptors
< SPIDER_NET_RX_DESCRIPTORS_MIN
) {
2248 rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_MIN
;
2249 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors
);
2251 if (rx_descriptors
> SPIDER_NET_RX_DESCRIPTORS_MAX
) {
2252 rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_MAX
;
2253 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors
);
2255 if (tx_descriptors
< SPIDER_NET_TX_DESCRIPTORS_MIN
) {
2256 tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_MIN
;
2257 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors
);
2259 if (tx_descriptors
> SPIDER_NET_TX_DESCRIPTORS_MAX
) {
2260 tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_MAX
;
2261 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors
);
2264 return pci_register_driver(&spider_net_driver
);
2268 * spider_net_cleanup - exit function when driver is unloaded
2270 * spider_net_cleanup unregisters the device driver
2272 static void __exit
spider_net_cleanup(void)
2274 pci_unregister_driver(&spider_net_driver
);
2277 module_init(spider_net_init
);
2278 module_exit(spider_net_cleanup
);