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
)
93 value
= readl(card
->regs
+ reg
);
94 value
= le32_to_cpu(value
);
100 * spider_net_write_reg - writes to an SMMIO register of a card
101 * @card: device structure
102 * @reg: register to write to
103 * @value: value to write into the specified SMMIO register
106 spider_net_write_reg(struct spider_net_card
*card
, u32 reg
, u32 value
)
108 value
= cpu_to_le32(value
);
109 writel(value
, card
->regs
+ reg
);
112 /** spider_net_write_phy - write to phy register
113 * @netdev: adapter to be written to
116 * @val: value to be written to phy register
118 * spider_net_write_phy_register writes to an arbitrary PHY
119 * register via the spider GPCWOPCMD register. We assume the queue does
120 * not run full (not more than 15 commands outstanding).
123 spider_net_write_phy(struct net_device
*netdev
, int mii_id
,
126 struct spider_net_card
*card
= netdev_priv(netdev
);
129 writevalue
= ((u32
)mii_id
<< 21) |
130 ((u32
)reg
<< 16) | ((u32
)val
);
132 spider_net_write_reg(card
, SPIDER_NET_GPCWOPCMD
, writevalue
);
135 /** spider_net_read_phy - read from phy register
136 * @netdev: network device to be read from
140 * Returns value read from PHY register
142 * spider_net_write_phy reads from an arbitrary PHY
143 * register via the spider GPCROPCMD register
146 spider_net_read_phy(struct net_device
*netdev
, int mii_id
, int reg
)
148 struct spider_net_card
*card
= netdev_priv(netdev
);
151 readvalue
= ((u32
)mii_id
<< 21) | ((u32
)reg
<< 16);
152 spider_net_write_reg(card
, SPIDER_NET_GPCROPCMD
, readvalue
);
154 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
155 * interrupt, as we poll for the completion of the read operation
156 * in spider_net_read_phy. Should take about 50 us */
158 readvalue
= spider_net_read_reg(card
, SPIDER_NET_GPCROPCMD
);
159 } while (readvalue
& SPIDER_NET_GPREXEC
);
161 readvalue
&= SPIDER_NET_GPRDAT_MASK
;
167 * spider_net_rx_irq_off - switch off rx irq on this spider card
168 * @card: device structure
170 * switches off rx irq by masking them out in the GHIINTnMSK register
173 spider_net_rx_irq_off(struct spider_net_card
*card
)
177 regvalue
= SPIDER_NET_INT0_MASK_VALUE
& (~SPIDER_NET_RXINT
);
178 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
182 * spider_net_rx_irq_on - switch on rx irq on this spider card
183 * @card: device structure
185 * switches on rx irq by enabling them in the GHIINTnMSK register
188 spider_net_rx_irq_on(struct spider_net_card
*card
)
192 regvalue
= SPIDER_NET_INT0_MASK_VALUE
| SPIDER_NET_RXINT
;
193 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
197 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
198 * @card: card structure
200 * spider_net_set_promisc sets the unicast destination address filter and
201 * thus either allows for non-promisc mode or promisc mode
204 spider_net_set_promisc(struct spider_net_card
*card
)
207 struct net_device
*netdev
= card
->netdev
;
209 if (netdev
->flags
& IFF_PROMISC
) {
210 /* clear destination entry 0 */
211 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, 0);
212 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, 0);
213 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
214 SPIDER_NET_PROMISC_VALUE
);
216 macu
= netdev
->dev_addr
[0];
218 macu
|= netdev
->dev_addr
[1];
219 memcpy(&macl
, &netdev
->dev_addr
[2], sizeof(macl
));
221 macu
|= SPIDER_NET_UA_DESCR_VALUE
;
222 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, macu
);
223 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, macl
);
224 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
225 SPIDER_NET_NONPROMISC_VALUE
);
230 * spider_net_get_mac_address - read mac address from spider card
231 * @card: device structure
233 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
236 spider_net_get_mac_address(struct net_device
*netdev
)
238 struct spider_net_card
*card
= netdev_priv(netdev
);
241 macl
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACL
);
242 macu
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACU
);
244 netdev
->dev_addr
[0] = (macu
>> 24) & 0xff;
245 netdev
->dev_addr
[1] = (macu
>> 16) & 0xff;
246 netdev
->dev_addr
[2] = (macu
>> 8) & 0xff;
247 netdev
->dev_addr
[3] = macu
& 0xff;
248 netdev
->dev_addr
[4] = (macl
>> 8) & 0xff;
249 netdev
->dev_addr
[5] = macl
& 0xff;
251 if (!is_valid_ether_addr(&netdev
->dev_addr
[0]))
258 * spider_net_get_descr_status -- returns the status of a descriptor
259 * @descr: descriptor to look at
261 * returns the status as in the dmac_cmd_status field of the descriptor
264 spider_net_get_descr_status(struct spider_net_descr
*descr
)
266 return descr
->dmac_cmd_status
& SPIDER_NET_DESCR_IND_PROC_MASK
;
270 * spider_net_free_chain - free descriptor chain
271 * @card: card structure
272 * @chain: address of chain
276 spider_net_free_chain(struct spider_net_card
*card
,
277 struct spider_net_descr_chain
*chain
)
279 struct spider_net_descr
*descr
;
281 for (descr
= chain
->tail
; !descr
->bus_addr
; descr
= descr
->next
) {
282 pci_unmap_single(card
->pdev
, descr
->bus_addr
,
283 SPIDER_NET_DESCR_SIZE
, PCI_DMA_BIDIRECTIONAL
);
289 * spider_net_init_chain - links descriptor chain
290 * @card: card structure
291 * @chain: address of chain
292 * @start_descr: address of descriptor array
293 * @no: number of descriptors
295 * we manage a circular list that mirrors the hardware structure,
296 * except that the hardware uses bus addresses.
298 * returns 0 on success, <0 on failure
301 spider_net_init_chain(struct spider_net_card
*card
,
302 struct spider_net_descr_chain
*chain
,
303 struct spider_net_descr
*start_descr
,
304 int direction
, int no
)
307 struct spider_net_descr
*descr
;
311 memset(descr
, 0, sizeof(*descr
) * no
);
313 /* set up the hardware pointers in each descriptor */
314 for (i
=0; i
<no
; i
++, descr
++) {
315 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
317 buf
= pci_map_single(card
->pdev
, descr
,
318 SPIDER_NET_DESCR_SIZE
,
321 if (pci_dma_mapping_error(buf
))
324 descr
->bus_addr
= buf
;
325 descr
->next
= descr
+ 1;
326 descr
->prev
= descr
- 1;
329 /* do actual circular list */
330 (descr
-1)->next
= start_descr
;
331 start_descr
->prev
= descr
-1;
334 if (direction
== PCI_DMA_FROMDEVICE
)
335 for (i
=0; i
< no
; i
++, descr
++)
336 descr
->next_descr_addr
= descr
->next
->bus_addr
;
338 spin_lock_init(&chain
->lock
);
339 chain
->head
= start_descr
;
340 chain
->tail
= start_descr
;
346 for (i
=0; i
< no
; i
++, descr
++)
348 pci_unmap_single(card
->pdev
, descr
->bus_addr
,
349 SPIDER_NET_DESCR_SIZE
,
355 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
356 * @card: card structure
358 * returns 0 on success, <0 on failure
361 spider_net_free_rx_chain_contents(struct spider_net_card
*card
)
363 struct spider_net_descr
*descr
;
365 descr
= card
->rx_chain
.head
;
366 while (descr
->next
!= card
->rx_chain
.head
) {
368 dev_kfree_skb(descr
->skb
);
369 pci_unmap_single(card
->pdev
, descr
->buf_addr
,
370 SPIDER_NET_MAX_FRAME
,
378 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
379 * @card: card structure
380 * @descr: descriptor to re-init
382 * return 0 on succes, <0 on failure
384 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
385 * Activate the descriptor state-wise
388 spider_net_prepare_rx_descr(struct spider_net_card
*card
,
389 struct spider_net_descr
*descr
)
396 /* we need to round up the buffer size to a multiple of 128 */
397 bufsize
= (SPIDER_NET_MAX_FRAME
+ SPIDER_NET_RXBUF_ALIGN
- 1) &
398 (~(SPIDER_NET_RXBUF_ALIGN
- 1));
400 /* and we need to have it 128 byte aligned, therefore we allocate a
402 /* allocate an skb */
403 descr
->skb
= dev_alloc_skb(bufsize
+ SPIDER_NET_RXBUF_ALIGN
- 1);
405 if (netif_msg_rx_err(card
) && net_ratelimit())
406 pr_err("Not enough memory to allocate rx buffer\n");
407 card
->spider_stats
.alloc_rx_skb_error
++;
410 descr
->buf_size
= bufsize
;
411 descr
->result_size
= 0;
412 descr
->valid_size
= 0;
413 descr
->data_status
= 0;
414 descr
->data_error
= 0;
416 offset
= ((unsigned long)descr
->skb
->data
) &
417 (SPIDER_NET_RXBUF_ALIGN
- 1);
419 skb_reserve(descr
->skb
, SPIDER_NET_RXBUF_ALIGN
- offset
);
420 /* io-mmu-map the skb */
421 buf
= pci_map_single(card
->pdev
, descr
->skb
->data
,
422 SPIDER_NET_MAX_FRAME
, PCI_DMA_FROMDEVICE
);
423 descr
->buf_addr
= buf
;
424 if (pci_dma_mapping_error(buf
)) {
425 dev_kfree_skb_any(descr
->skb
);
426 if (netif_msg_rx_err(card
) && net_ratelimit())
427 pr_err("Could not iommu-map rx buffer\n");
428 card
->spider_stats
.rx_iommu_map_error
++;
429 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
431 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_CARDOWNED
|
432 SPIDER_NET_DMAC_NOINTR_COMPLETE
;
439 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
440 * @card: card structure
442 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
443 * chip by writing to the appropriate register. DMA is enabled in
444 * spider_net_enable_rxdmac.
447 spider_net_enable_rxchtails(struct spider_net_card
*card
)
449 /* assume chain is aligned correctly */
450 spider_net_write_reg(card
, SPIDER_NET_GDADCHA
,
451 card
->rx_chain
.tail
->bus_addr
);
455 * spider_net_enable_rxdmac - enables a receive DMA controller
456 * @card: card structure
458 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
459 * in the GDADMACCNTR register
462 spider_net_enable_rxdmac(struct spider_net_card
*card
)
465 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
466 SPIDER_NET_DMA_RX_VALUE
);
470 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
471 * @card: card structure
473 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
476 spider_net_refill_rx_chain(struct spider_net_card
*card
)
478 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
481 /* one context doing the refill (and a second context seeing that
482 * and omitting it) is ok. If called by NAPI, we'll be called again
483 * as spider_net_decode_one_descr is called several times. If some
484 * interrupt calls us, the NAPI is about to clean up anyway. */
485 if (!spin_trylock_irqsave(&chain
->lock
, flags
))
488 while (spider_net_get_descr_status(chain
->head
) ==
489 SPIDER_NET_DESCR_NOT_IN_USE
) {
490 if (spider_net_prepare_rx_descr(card
, chain
->head
))
492 chain
->head
= chain
->head
->next
;
495 spin_unlock_irqrestore(&chain
->lock
, flags
);
499 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
500 * @card: card structure
502 * returns 0 on success, <0 on failure
505 spider_net_alloc_rx_skbs(struct spider_net_card
*card
)
508 struct spider_net_descr_chain
*chain
;
512 chain
= &card
->rx_chain
;
513 /* put at least one buffer into the chain. if this fails,
514 * we've got a problem. if not, spider_net_refill_rx_chain
515 * will do the rest at the end of this function */
516 if (spider_net_prepare_rx_descr(card
, chain
->head
))
519 chain
->head
= chain
->head
->next
;
521 /* this will allocate the rest of the rx buffers; if not, it's
522 * business as usual later on */
523 spider_net_refill_rx_chain(card
);
524 spider_net_enable_rxdmac(card
);
528 spider_net_free_rx_chain_contents(card
);
533 * spider_net_get_multicast_hash - generates hash for multicast filter table
534 * @addr: multicast address
536 * returns the hash value.
538 * spider_net_get_multicast_hash calculates a hash value for a given multicast
539 * address, that is used to set the multicast filter tables
542 spider_net_get_multicast_hash(struct net_device
*netdev
, __u8
*addr
)
546 char addr_for_crc
[ETH_ALEN
] = { 0, };
549 for (i
= 0; i
< ETH_ALEN
* 8; i
++) {
550 bit
= (addr
[i
/ 8] >> (i
% 8)) & 1;
551 addr_for_crc
[ETH_ALEN
- 1 - i
/ 8] += bit
<< (7 - (i
% 8));
554 crc
= crc32_be(~0, addr_for_crc
, netdev
->addr_len
);
565 * spider_net_set_multi - sets multicast addresses and promisc flags
566 * @netdev: interface device structure
568 * spider_net_set_multi configures multicast addresses as needed for the
569 * netdev interface. It also sets up multicast, allmulti and promisc
570 * flags appropriately
573 spider_net_set_multi(struct net_device
*netdev
)
575 struct dev_mc_list
*mc
;
579 struct spider_net_card
*card
= netdev_priv(netdev
);
580 unsigned long bitmask
[SPIDER_NET_MULTICAST_HASHES
/ BITS_PER_LONG
] =
583 spider_net_set_promisc(card
);
585 if (netdev
->flags
& IFF_ALLMULTI
) {
586 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
; i
++) {
592 /* well, we know, what the broadcast hash value is: it's xfd
593 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
594 set_bit(0xfd, bitmask
);
596 for (mc
= netdev
->mc_list
; mc
; mc
= mc
->next
) {
597 hash
= spider_net_get_multicast_hash(netdev
, mc
->dmi_addr
);
598 set_bit(hash
, bitmask
);
602 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
/ 4; i
++) {
604 if (test_bit(i
* 4, bitmask
))
607 if (test_bit(i
* 4 + 1, bitmask
))
610 if (test_bit(i
* 4 + 2, bitmask
))
613 if (test_bit(i
* 4 + 3, bitmask
))
616 spider_net_write_reg(card
, SPIDER_NET_GMRMHFILnR
+ i
* 4, reg
);
621 * spider_net_disable_rxdmac - disables the receive DMA controller
622 * @card: card structure
624 * spider_net_disable_rxdmac terminates processing on the DMA controller by
625 * turing off DMA and issueing a force end
628 spider_net_disable_rxdmac(struct spider_net_card
*card
)
630 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
631 SPIDER_NET_DMA_RX_FEND_VALUE
);
635 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
636 * @card: card structure
637 * @descr: descriptor structure to fill out
638 * @skb: packet to use
640 * returns 0 on success, <0 on failure.
642 * fills out the descriptor structure with skb data and len. Copies data,
643 * if needed (32bit DMA!)
646 spider_net_prepare_tx_descr(struct spider_net_card
*card
,
649 struct spider_net_descr
*descr
= card
->tx_chain
.head
;
654 if (length
< ETH_ZLEN
) {
655 if (skb_pad(skb
, ETH_ZLEN
-length
))
660 buf
= pci_map_single(card
->pdev
, skb
->data
, length
, PCI_DMA_TODEVICE
);
661 if (pci_dma_mapping_error(buf
)) {
662 if (netif_msg_tx_err(card
) && net_ratelimit())
663 pr_err("could not iommu-map packet (%p, %i). "
664 "Dropping packet\n", skb
->data
, length
);
665 card
->spider_stats
.tx_iommu_map_error
++;
669 descr
->buf_addr
= buf
;
670 descr
->buf_size
= length
;
671 descr
->next_descr_addr
= 0;
673 descr
->data_status
= 0;
675 descr
->dmac_cmd_status
=
676 SPIDER_NET_DESCR_CARDOWNED
| SPIDER_NET_DMAC_NOCS
;
677 if (skb
->protocol
== htons(ETH_P_IP
))
678 switch (skb
->nh
.iph
->protocol
) {
680 descr
->dmac_cmd_status
|= SPIDER_NET_DMAC_TCP
;
683 descr
->dmac_cmd_status
|= SPIDER_NET_DMAC_UDP
;
687 descr
->prev
->next_descr_addr
= descr
->bus_addr
;
689 card
->netdev
->trans_start
= jiffies
; /* set netdev watchdog timer */
694 * spider_net_release_tx_descr - processes a used tx descriptor
695 * @card: card structure
696 * @descr: descriptor to release
698 * releases a used tx descriptor (unmapping, freeing of skb)
701 spider_net_release_tx_descr(struct spider_net_card
*card
)
703 struct spider_net_descr
*descr
= card
->tx_chain
.tail
;
707 card
->tx_chain
.tail
= card
->tx_chain
.tail
->next
;
708 descr
->dmac_cmd_status
|= SPIDER_NET_DESCR_NOT_IN_USE
;
714 len
= skb
->len
< ETH_ZLEN
? ETH_ZLEN
: skb
->len
;
715 pci_unmap_single(card
->pdev
, descr
->buf_addr
, len
,
717 dev_kfree_skb_any(skb
);
721 * spider_net_release_tx_chain - processes sent tx descriptors
722 * @card: adapter structure
723 * @brutal: if set, don't care about whether descriptor seems to be in use
725 * returns 0 if the tx ring is empty, otherwise 1.
727 * spider_net_release_tx_chain releases the tx descriptors that spider has
728 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
729 * If some other context is calling this function, we return 1 so that we're
730 * scheduled again (if we were scheduled) and will not loose initiative.
733 spider_net_release_tx_chain(struct spider_net_card
*card
, int brutal
)
735 struct spider_net_descr_chain
*chain
= &card
->tx_chain
;
738 spider_net_read_reg(card
, SPIDER_NET_GDTDMACCNTR
);
740 while (chain
->tail
!= chain
->head
) {
741 status
= spider_net_get_descr_status(chain
->tail
);
743 case SPIDER_NET_DESCR_COMPLETE
:
744 card
->netdev_stats
.tx_packets
++;
745 card
->netdev_stats
.tx_bytes
+= chain
->tail
->skb
->len
;
748 case SPIDER_NET_DESCR_CARDOWNED
:
751 /* fallthrough, if we release the descriptors
752 * brutally (then we don't care about
753 * SPIDER_NET_DESCR_CARDOWNED) */
755 case SPIDER_NET_DESCR_RESPONSE_ERROR
:
756 case SPIDER_NET_DESCR_PROTECTION_ERROR
:
757 case SPIDER_NET_DESCR_FORCE_END
:
758 if (netif_msg_tx_err(card
))
759 pr_err("%s: forcing end of tx descriptor "
760 "with status x%02x\n",
761 card
->netdev
->name
, status
);
762 card
->netdev_stats
.tx_errors
++;
766 card
->netdev_stats
.tx_dropped
++;
770 spider_net_release_tx_descr(card
);
777 * spider_net_kick_tx_dma - enables TX DMA processing
778 * @card: card structure
779 * @descr: descriptor address to enable TX processing at
781 * spider_net_kick_tx_dma writes the current tx chain head as start address
782 * of the tx descriptor chain and enables the transmission DMA engine
785 spider_net_kick_tx_dma(struct spider_net_card
*card
)
787 struct spider_net_descr
*descr
;
789 if (spider_net_read_reg(card
, SPIDER_NET_GDTDMACCNTR
) &
790 SPIDER_NET_TX_DMA_EN
)
793 descr
= card
->tx_chain
.tail
;
795 if (spider_net_get_descr_status(descr
) ==
796 SPIDER_NET_DESCR_CARDOWNED
) {
797 spider_net_write_reg(card
, SPIDER_NET_GDTDCHA
,
799 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
800 SPIDER_NET_DMA_TX_VALUE
);
803 if (descr
== card
->tx_chain
.head
)
809 mod_timer(&card
->tx_timer
, jiffies
+ SPIDER_NET_TX_TIMER
);
813 * spider_net_xmit - transmits a frame over the device
814 * @skb: packet to send out
815 * @netdev: interface device structure
817 * returns 0 on success, !0 on failure
820 spider_net_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
822 struct spider_net_card
*card
= netdev_priv(netdev
);
823 struct spider_net_descr_chain
*chain
= &card
->tx_chain
;
824 struct spider_net_descr
*descr
= chain
->head
;
828 spin_lock_irqsave(&chain
->lock
, flags
);
830 spider_net_release_tx_chain(card
, 0);
832 if (chain
->head
->next
== chain
->tail
->prev
) {
833 card
->netdev_stats
.tx_dropped
++;
834 result
= NETDEV_TX_LOCKED
;
838 if (spider_net_get_descr_status(descr
) != SPIDER_NET_DESCR_NOT_IN_USE
) {
839 card
->netdev_stats
.tx_dropped
++;
840 result
= NETDEV_TX_LOCKED
;
844 if (spider_net_prepare_tx_descr(card
, skb
) != 0) {
845 card
->netdev_stats
.tx_dropped
++;
846 result
= NETDEV_TX_BUSY
;
850 result
= NETDEV_TX_OK
;
852 spider_net_kick_tx_dma(card
);
853 card
->tx_chain
.head
= card
->tx_chain
.head
->next
;
856 spin_unlock_irqrestore(&chain
->lock
, flags
);
857 netif_wake_queue(netdev
);
862 * spider_net_cleanup_tx_ring - cleans up the TX ring
863 * @card: card structure
865 * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
866 * interrupts to cleanup our TX ring) and returns sent packets to the stack
870 spider_net_cleanup_tx_ring(struct spider_net_card
*card
)
874 spin_lock_irqsave(&card
->tx_chain
.lock
, flags
);
876 if ((spider_net_release_tx_chain(card
, 0) != 0) &&
877 (card
->netdev
->flags
& IFF_UP
))
878 spider_net_kick_tx_dma(card
);
880 spin_unlock_irqrestore(&card
->tx_chain
.lock
, flags
);
884 * spider_net_do_ioctl - called for device ioctls
885 * @netdev: interface device structure
886 * @ifr: request parameter structure for ioctl
887 * @cmd: command code for ioctl
889 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
890 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
893 spider_net_do_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
902 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
903 * @descr: descriptor to process
904 * @card: card structure
905 * @napi: whether caller is in NAPI context
907 * returns 1 on success, 0 if no packet was passed to the stack
909 * iommu-unmaps the skb, fills out skb structure and passes the data to the
910 * stack. The descriptor state is not changed.
913 spider_net_pass_skb_up(struct spider_net_descr
*descr
,
914 struct spider_net_card
*card
, int napi
)
917 struct net_device
*netdev
;
918 u32 data_status
, data_error
;
920 data_status
= descr
->data_status
;
921 data_error
= descr
->data_error
;
923 netdev
= card
->netdev
;
925 /* unmap descriptor */
926 pci_unmap_single(card
->pdev
, descr
->buf_addr
, SPIDER_NET_MAX_FRAME
,
929 /* the cases we'll throw away the packet immediately */
930 if (data_error
& SPIDER_NET_DESTROY_RX_FLAGS
) {
931 if (netif_msg_rx_err(card
))
932 pr_err("error in received descriptor found, "
933 "data_status=x%08x, data_error=x%08x\n",
934 data_status
, data_error
);
935 card
->spider_stats
.rx_desc_error
++;
941 skb_put(skb
, descr
->valid_size
);
943 /* the card seems to add 2 bytes of junk in front
944 * of the ethernet frame */
945 #define SPIDER_MISALIGN 2
946 skb_pull(skb
, SPIDER_MISALIGN
);
947 skb
->protocol
= eth_type_trans(skb
, netdev
);
949 /* checksum offload */
950 if (card
->options
.rx_csum
) {
951 if ( ( (data_status
& SPIDER_NET_DATA_STATUS_CKSUM_MASK
) ==
952 SPIDER_NET_DATA_STATUS_CKSUM_MASK
) &&
953 !(data_error
& SPIDER_NET_DATA_ERR_CKSUM_MASK
))
954 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
956 skb
->ip_summed
= CHECKSUM_NONE
;
958 skb
->ip_summed
= CHECKSUM_NONE
;
960 if (data_status
& SPIDER_NET_VLAN_PACKET
) {
961 /* further enhancements: HW-accel VLAN
962 * vlan_hwaccel_receive_skb
966 /* pass skb up to stack */
968 netif_receive_skb(skb
);
972 /* update netdevice statistics */
973 card
->netdev_stats
.rx_packets
++;
974 card
->netdev_stats
.rx_bytes
+= skb
->len
;
980 * spider_net_decode_one_descr - processes an rx descriptor
981 * @card: card structure
982 * @napi: whether caller is in NAPI context
984 * returns 1 if a packet has been sent to the stack, otherwise 0
986 * processes an rx descriptor by iommu-unmapping the data buffer and passing
987 * the packet up to the stack. This function is called in softirq
988 * context, e.g. either bottom half from interrupt or NAPI polling context
991 spider_net_decode_one_descr(struct spider_net_card
*card
, int napi
)
993 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
994 struct spider_net_descr
*descr
= chain
->tail
;
998 status
= spider_net_get_descr_status(descr
);
1000 if (status
== SPIDER_NET_DESCR_CARDOWNED
) {
1001 /* nothing in the descriptor yet */
1006 if (status
== SPIDER_NET_DESCR_NOT_IN_USE
) {
1007 /* not initialized yet, the ring must be empty */
1008 spider_net_refill_rx_chain(card
);
1009 spider_net_enable_rxdmac(card
);
1014 /* descriptor definitively used -- move on tail */
1015 chain
->tail
= descr
->next
;
1018 if ( (status
== SPIDER_NET_DESCR_RESPONSE_ERROR
) ||
1019 (status
== SPIDER_NET_DESCR_PROTECTION_ERROR
) ||
1020 (status
== SPIDER_NET_DESCR_FORCE_END
) ) {
1021 if (netif_msg_rx_err(card
))
1022 pr_err("%s: dropping RX descriptor with state %d\n",
1023 card
->netdev
->name
, status
);
1024 card
->netdev_stats
.rx_dropped
++;
1025 pci_unmap_single(card
->pdev
, descr
->buf_addr
,
1026 SPIDER_NET_MAX_FRAME
, PCI_DMA_FROMDEVICE
);
1027 dev_kfree_skb_irq(descr
->skb
);
1031 if ( (status
!= SPIDER_NET_DESCR_COMPLETE
) &&
1032 (status
!= SPIDER_NET_DESCR_FRAME_END
) ) {
1033 if (netif_msg_rx_err(card
)) {
1034 pr_err("%s: RX descriptor with state %d\n",
1035 card
->netdev
->name
, status
);
1036 card
->spider_stats
.rx_desc_unk_state
++;
1041 /* ok, we've got a packet in descr */
1042 result
= spider_net_pass_skb_up(descr
, card
, napi
);
1044 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
1045 /* change the descriptor state: */
1047 spider_net_refill_rx_chain(card
);
1053 * spider_net_poll - NAPI poll function called by the stack to return packets
1054 * @netdev: interface device structure
1055 * @budget: number of packets we can pass to the stack at most
1057 * returns 0 if no more packets available to the driver/stack. Returns 1,
1058 * if the quota is exceeded, but the driver has still packets.
1060 * spider_net_poll returns all packets from the rx descriptors to the stack
1061 * (using netif_receive_skb). If all/enough packets are up, the driver
1062 * reenables interrupts and returns 0. If not, 1 is returned.
1065 spider_net_poll(struct net_device
*netdev
, int *budget
)
1067 struct spider_net_card
*card
= netdev_priv(netdev
);
1068 int packets_to_do
, packets_done
= 0;
1069 int no_more_packets
= 0;
1071 packets_to_do
= min(*budget
, netdev
->quota
);
1073 while (packets_to_do
) {
1074 if (spider_net_decode_one_descr(card
, 1)) {
1078 /* no more packets for the stack */
1079 no_more_packets
= 1;
1084 netdev
->quota
-= packets_done
;
1085 *budget
-= packets_done
;
1086 spider_net_refill_rx_chain(card
);
1088 /* if all packets are in the stack, enable interrupts and return 0 */
1089 /* if not, return 1 */
1090 if (no_more_packets
) {
1091 netif_rx_complete(netdev
);
1092 spider_net_rx_irq_on(card
);
1100 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1101 * @netdev: interface device structure
1102 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1105 spider_net_vlan_rx_reg(struct net_device
*netdev
, struct vlan_group
*grp
)
1107 /* further enhancement... yet to do */
1112 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1113 * @netdev: interface device structure
1114 * @vid: VLAN id to add
1117 spider_net_vlan_rx_add(struct net_device
*netdev
, uint16_t vid
)
1119 /* further enhancement... yet to do */
1120 /* add vid to card's VLAN filter table */
1125 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1126 * @netdev: interface device structure
1127 * @vid: VLAN id to remove
1130 spider_net_vlan_rx_kill(struct net_device
*netdev
, uint16_t vid
)
1132 /* further enhancement... yet to do */
1133 /* remove vid from card's VLAN filter table */
1137 * spider_net_get_stats - get interface statistics
1138 * @netdev: interface device structure
1140 * returns the interface statistics residing in the spider_net_card struct
1142 static struct net_device_stats
*
1143 spider_net_get_stats(struct net_device
*netdev
)
1145 struct spider_net_card
*card
= netdev_priv(netdev
);
1146 struct net_device_stats
*stats
= &card
->netdev_stats
;
1151 * spider_net_change_mtu - changes the MTU of an interface
1152 * @netdev: interface device structure
1153 * @new_mtu: new MTU value
1155 * returns 0 on success, <0 on failure
1158 spider_net_change_mtu(struct net_device
*netdev
, int new_mtu
)
1160 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1161 * and mtu is outbound only anyway */
1162 if ( (new_mtu
< SPIDER_NET_MIN_MTU
) ||
1163 (new_mtu
> SPIDER_NET_MAX_MTU
) )
1165 netdev
->mtu
= new_mtu
;
1170 * spider_net_set_mac - sets the MAC of an interface
1171 * @netdev: interface device structure
1172 * @ptr: pointer to new MAC address
1174 * Returns 0 on success, <0 on failure. Currently, we don't support this
1175 * and will always return EOPNOTSUPP.
1178 spider_net_set_mac(struct net_device
*netdev
, void *p
)
1180 struct spider_net_card
*card
= netdev_priv(netdev
);
1181 u32 macl
, macu
, regvalue
;
1182 struct sockaddr
*addr
= p
;
1184 if (!is_valid_ether_addr(addr
->sa_data
))
1185 return -EADDRNOTAVAIL
;
1187 /* switch off GMACTPE and GMACRPE */
1188 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1189 regvalue
&= ~((1 << 5) | (1 << 6));
1190 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1193 macu
= (addr
->sa_data
[0]<<24) + (addr
->sa_data
[1]<<16) +
1194 (addr
->sa_data
[2]<<8) + (addr
->sa_data
[3]);
1195 macl
= (addr
->sa_data
[4]<<8) + (addr
->sa_data
[5]);
1196 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACU
, macu
);
1197 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACL
, macl
);
1199 /* switch GMACTPE and GMACRPE back on */
1200 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1201 regvalue
|= ((1 << 5) | (1 << 6));
1202 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1204 spider_net_set_promisc(card
);
1206 /* look up, whether we have been successful */
1207 if (spider_net_get_mac_address(netdev
))
1208 return -EADDRNOTAVAIL
;
1209 if (memcmp(netdev
->dev_addr
,addr
->sa_data
,netdev
->addr_len
))
1210 return -EADDRNOTAVAIL
;
1216 * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
1217 * @card: card structure
1219 * spider_net_handle_rxram_full empties the RX ring so that spider can put
1220 * more packets in it and empty its RX RAM. This is called in bottom half
1224 spider_net_handle_rxram_full(struct spider_net_card
*card
)
1226 while (spider_net_decode_one_descr(card
, 0))
1228 spider_net_enable_rxchtails(card
);
1229 spider_net_enable_rxdmac(card
);
1230 netif_rx_schedule(card
->netdev
);
1234 * spider_net_handle_error_irq - handles errors raised by an interrupt
1235 * @card: card structure
1236 * @status_reg: interrupt status register 0 (GHIINT0STS)
1238 * spider_net_handle_error_irq treats or ignores all error conditions
1239 * found when an interrupt is presented
1242 spider_net_handle_error_irq(struct spider_net_card
*card
, u32 status_reg
)
1244 u32 error_reg1
, error_reg2
;
1248 error_reg1
= spider_net_read_reg(card
, SPIDER_NET_GHIINT1STS
);
1249 error_reg2
= spider_net_read_reg(card
, SPIDER_NET_GHIINT2STS
);
1251 /* check GHIINT0STS ************************************/
1253 for (i
= 0; i
< 32; i
++)
1254 if (status_reg
& (1<<i
))
1257 /* let error_reg1 and error_reg2 evaluation decide, what to do
1258 case SPIDER_NET_PHYINT:
1259 case SPIDER_NET_GMAC2INT:
1260 case SPIDER_NET_GMAC1INT:
1261 case SPIDER_NET_GIPSINT:
1262 case SPIDER_NET_GFIFOINT:
1263 case SPIDER_NET_DMACINT:
1264 case SPIDER_NET_GSYSINT:
1267 case SPIDER_NET_GPWOPCMPINT
:
1268 /* PHY write operation completed */
1271 case SPIDER_NET_GPROPCMPINT
:
1272 /* PHY read operation completed */
1273 /* we don't use semaphores, as we poll for the completion
1274 * of the read operation in spider_net_read_phy. Should take
1278 case SPIDER_NET_GPWFFINT
:
1279 /* PHY command queue full */
1280 if (netif_msg_intr(card
))
1281 pr_err("PHY write queue full\n");
1285 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1286 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1287 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1289 case SPIDER_NET_GDTDEN0INT
:
1290 /* someone has set TX_DMA_EN to 0 */
1294 case SPIDER_NET_GDDDEN0INT
: /* fallthrough */
1295 case SPIDER_NET_GDCDEN0INT
: /* fallthrough */
1296 case SPIDER_NET_GDBDEN0INT
: /* fallthrough */
1297 case SPIDER_NET_GDADEN0INT
:
1298 /* someone has set RX_DMA_EN to 0 */
1303 case SPIDER_NET_GDDFDCINT
:
1304 case SPIDER_NET_GDCFDCINT
:
1305 case SPIDER_NET_GDBFDCINT
:
1306 case SPIDER_NET_GDAFDCINT
:
1307 /* case SPIDER_NET_GDNMINT: not used. print a message */
1308 /* case SPIDER_NET_GCNMINT: not used. print a message */
1309 /* case SPIDER_NET_GBNMINT: not used. print a message */
1310 /* case SPIDER_NET_GANMINT: not used. print a message */
1311 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1316 case SPIDER_NET_GDTFDCINT
:
1319 case SPIDER_NET_GTTEDINT
:
1322 case SPIDER_NET_GDTDCEINT
:
1323 /* chain end. If a descriptor should be sent, kick off
1325 if (card->tx_chain.tail == card->tx_chain.head)
1326 spider_net_kick_tx_dma(card);
1330 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1331 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1334 /* check GHIINT1STS ************************************/
1336 for (i
= 0; i
< 32; i
++)
1337 if (error_reg1
& (1<<i
))
1340 case SPIDER_NET_GTMFLLINT
:
1341 if (netif_msg_intr(card
) && net_ratelimit())
1342 pr_err("Spider TX RAM full\n");
1345 case SPIDER_NET_GRFDFLLINT
: /* fallthrough */
1346 case SPIDER_NET_GRFCFLLINT
: /* fallthrough */
1347 case SPIDER_NET_GRFBFLLINT
: /* fallthrough */
1348 case SPIDER_NET_GRFAFLLINT
: /* fallthrough */
1349 case SPIDER_NET_GRMFLLINT
:
1350 if (netif_msg_intr(card
) && net_ratelimit())
1351 pr_debug("Spider RX RAM full, incoming packets "
1352 "might be discarded!\n");
1353 spider_net_rx_irq_off(card
);
1354 tasklet_schedule(&card
->rxram_full_tl
);
1358 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1359 case SPIDER_NET_GDTINVDINT
:
1360 /* allrighty. tx from previous descr ok */
1365 case SPIDER_NET_GDDDCEINT
: /* fallthrough */
1366 case SPIDER_NET_GDCDCEINT
: /* fallthrough */
1367 case SPIDER_NET_GDBDCEINT
: /* fallthrough */
1368 case SPIDER_NET_GDADCEINT
:
1369 if (netif_msg_intr(card
))
1370 pr_err("got descriptor chain end interrupt, "
1371 "restarting DMAC %c.\n",
1372 'D'+i
-SPIDER_NET_GDDDCEINT
);
1373 spider_net_refill_rx_chain(card
);
1374 spider_net_enable_rxdmac(card
);
1378 /* invalid descriptor */
1379 case SPIDER_NET_GDDINVDINT
: /* fallthrough */
1380 case SPIDER_NET_GDCINVDINT
: /* fallthrough */
1381 case SPIDER_NET_GDBINVDINT
: /* fallthrough */
1382 case SPIDER_NET_GDAINVDINT
:
1383 /* could happen when rx chain is full */
1384 spider_net_refill_rx_chain(card
);
1385 spider_net_enable_rxdmac(card
);
1389 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1390 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1391 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1392 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1393 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1394 /* case SPIDER_NET_GDSERINT: problem, print a message */
1395 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1396 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1397 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1398 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1399 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1405 /* check GHIINT2STS ************************************/
1407 for (i
= 0; i
< 32; i
++)
1408 if (error_reg2
& (1<<i
))
1411 /* there is nothing we can (want to) do at this time. Log a
1412 * message, we can switch on and off the specific values later on
1413 case SPIDER_NET_GPROPERINT:
1414 case SPIDER_NET_GMCTCRSNGINT:
1415 case SPIDER_NET_GMCTLCOLINT:
1416 case SPIDER_NET_GMCTTMOTINT:
1417 case SPIDER_NET_GMCRCAERINT:
1418 case SPIDER_NET_GMCRCALERINT:
1419 case SPIDER_NET_GMCRALNERINT:
1420 case SPIDER_NET_GMCROVRINT:
1421 case SPIDER_NET_GMCRRNTINT:
1422 case SPIDER_NET_GMCRRXERINT:
1423 case SPIDER_NET_GTITCSERINT:
1424 case SPIDER_NET_GTIFMTERINT:
1425 case SPIDER_NET_GTIPKTRVKINT:
1426 case SPIDER_NET_GTISPINGINT:
1427 case SPIDER_NET_GTISADNGINT:
1428 case SPIDER_NET_GTISPDNGINT:
1429 case SPIDER_NET_GRIFMTERINT:
1430 case SPIDER_NET_GRIPKTRVKINT:
1431 case SPIDER_NET_GRISPINGINT:
1432 case SPIDER_NET_GRISADNGINT:
1433 case SPIDER_NET_GRISPDNGINT:
1440 if ((show_error
) && (netif_msg_intr(card
)))
1441 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1442 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1443 status_reg
, error_reg1
, error_reg2
);
1445 /* clear interrupt sources */
1446 spider_net_write_reg(card
, SPIDER_NET_GHIINT1STS
, error_reg1
);
1447 spider_net_write_reg(card
, SPIDER_NET_GHIINT2STS
, error_reg2
);
1451 * spider_net_interrupt - interrupt handler for spider_net
1452 * @irq: interupt number
1453 * @ptr: pointer to net_device
1454 * @regs: PU registers
1456 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1457 * interrupt found raised by card.
1459 * This is the interrupt handler, that turns off
1460 * interrupts for this device and makes the stack poll the driver
1463 spider_net_interrupt(int irq
, void *ptr
)
1465 struct net_device
*netdev
= ptr
;
1466 struct spider_net_card
*card
= netdev_priv(netdev
);
1469 status_reg
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0STS
);
1474 if (status_reg
& SPIDER_NET_RXINT
) {
1475 spider_net_rx_irq_off(card
);
1476 netif_rx_schedule(netdev
);
1479 if (status_reg
& SPIDER_NET_ERRINT
)
1480 spider_net_handle_error_irq(card
, status_reg
);
1482 /* clear interrupt sources */
1483 spider_net_write_reg(card
, SPIDER_NET_GHIINT0STS
, status_reg
);
1488 #ifdef CONFIG_NET_POLL_CONTROLLER
1490 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1491 * @netdev: interface device structure
1493 * see Documentation/networking/netconsole.txt
1496 spider_net_poll_controller(struct net_device
*netdev
)
1498 disable_irq(netdev
->irq
);
1499 spider_net_interrupt(netdev
->irq
, netdev
);
1500 enable_irq(netdev
->irq
);
1502 #endif /* CONFIG_NET_POLL_CONTROLLER */
1505 * spider_net_init_card - initializes the card
1506 * @card: card structure
1508 * spider_net_init_card initializes the card so that other registers can
1512 spider_net_init_card(struct spider_net_card
*card
)
1514 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1515 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1517 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1518 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1522 * spider_net_enable_card - enables the card by setting all kinds of regs
1523 * @card: card structure
1525 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1528 spider_net_enable_card(struct spider_net_card
*card
)
1531 /* the following array consists of (register),(value) pairs
1532 * that are set in this function. A register of 0 ends the list */
1534 { SPIDER_NET_GRESUMINTNUM
, 0 },
1535 { SPIDER_NET_GREINTNUM
, 0 },
1537 /* set interrupt frame number registers */
1538 /* clear the single DMA engine registers first */
1539 { SPIDER_NET_GFAFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1540 { SPIDER_NET_GFBFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1541 { SPIDER_NET_GFCFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1542 { SPIDER_NET_GFDFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1543 /* then set, what we really need */
1544 { SPIDER_NET_GFFRMNUM
, SPIDER_NET_FRAMENUM_VALUE
},
1546 /* timer counter registers and stuff */
1547 { SPIDER_NET_GFREECNNUM
, 0 },
1548 { SPIDER_NET_GONETIMENUM
, 0 },
1549 { SPIDER_NET_GTOUTFRMNUM
, 0 },
1551 /* RX mode setting */
1552 { SPIDER_NET_GRXMDSET
, SPIDER_NET_RXMODE_VALUE
},
1553 /* TX mode setting */
1554 { SPIDER_NET_GTXMDSET
, SPIDER_NET_TXMODE_VALUE
},
1555 /* IPSEC mode setting */
1556 { SPIDER_NET_GIPSECINIT
, SPIDER_NET_IPSECINIT_VALUE
},
1558 { SPIDER_NET_GFTRESTRT
, SPIDER_NET_RESTART_VALUE
},
1560 { SPIDER_NET_GMRWOLCTRL
, 0 },
1561 { SPIDER_NET_GTESTMD
, 0x10000000 },
1562 { SPIDER_NET_GTTQMSK
, 0x00400040 },
1564 { SPIDER_NET_GMACINTEN
, 0 },
1566 /* flow control stuff */
1567 { SPIDER_NET_GMACAPAUSE
, SPIDER_NET_MACAPAUSE_VALUE
},
1568 { SPIDER_NET_GMACTXPAUSE
, SPIDER_NET_TXPAUSE_VALUE
},
1570 { SPIDER_NET_GMACBSTLMT
, SPIDER_NET_BURSTLMT_VALUE
},
1575 while (regs
[i
][0]) {
1576 spider_net_write_reg(card
, regs
[i
][0], regs
[i
][1]);
1580 /* clear unicast filter table entries 1 to 14 */
1581 for (i
= 1; i
<= 14; i
++) {
1582 spider_net_write_reg(card
,
1583 SPIDER_NET_GMRUAFILnR
+ i
* 8,
1585 spider_net_write_reg(card
,
1586 SPIDER_NET_GMRUAFILnR
+ i
* 8 + 4,
1590 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
, 0x08080000);
1592 spider_net_write_reg(card
, SPIDER_NET_ECMODE
, SPIDER_NET_ECMODE_VALUE
);
1594 /* set chain tail adress for RX chains and
1596 spider_net_enable_rxchtails(card
);
1597 spider_net_enable_rxdmac(card
);
1599 spider_net_write_reg(card
, SPIDER_NET_GRXDMAEN
, SPIDER_NET_WOL_VALUE
);
1601 spider_net_write_reg(card
, SPIDER_NET_GMACLENLMT
,
1602 SPIDER_NET_LENLMT_VALUE
);
1603 spider_net_write_reg(card
, SPIDER_NET_GMACMODE
,
1604 SPIDER_NET_MACMODE_VALUE
);
1605 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
,
1606 SPIDER_NET_OPMODE_VALUE
);
1608 /* set interrupt mask registers */
1609 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
,
1610 SPIDER_NET_INT0_MASK_VALUE
);
1611 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
,
1612 SPIDER_NET_INT1_MASK_VALUE
);
1613 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
,
1614 SPIDER_NET_INT2_MASK_VALUE
);
1616 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
1617 SPIDER_NET_GDTBSTA
| SPIDER_NET_GDTDCEIDIS
);
1621 * spider_net_open - called upon ifonfig up
1622 * @netdev: interface device structure
1624 * returns 0 on success, <0 on failure
1626 * spider_net_open allocates all the descriptors and memory needed for
1627 * operation, sets up multicast list and enables interrupts
1630 spider_net_open(struct net_device
*netdev
)
1632 struct spider_net_card
*card
= netdev_priv(netdev
);
1636 if (spider_net_init_chain(card
, &card
->tx_chain
, card
->descr
,
1637 PCI_DMA_TODEVICE
, card
->tx_desc
))
1638 goto alloc_tx_failed
;
1639 if (spider_net_init_chain(card
, &card
->rx_chain
,
1640 card
->descr
+ card
->rx_desc
,
1641 PCI_DMA_FROMDEVICE
, card
->rx_desc
))
1642 goto alloc_rx_failed
;
1644 /* allocate rx skbs */
1645 if (spider_net_alloc_rx_skbs(card
))
1646 goto alloc_skbs_failed
;
1648 spider_net_set_multi(netdev
);
1650 /* further enhancement: setup hw vlan, if needed */
1653 if (request_irq(netdev
->irq
, spider_net_interrupt
,
1654 IRQF_SHARED
, netdev
->name
, netdev
))
1655 goto register_int_failed
;
1657 spider_net_enable_card(card
);
1659 netif_start_queue(netdev
);
1660 netif_carrier_on(netdev
);
1661 netif_poll_enable(netdev
);
1665 register_int_failed
:
1666 spider_net_free_rx_chain_contents(card
);
1668 spider_net_free_chain(card
, &card
->rx_chain
);
1670 spider_net_free_chain(card
, &card
->tx_chain
);
1676 * spider_net_setup_phy - setup PHY
1677 * @card: card structure
1679 * returns 0 on success, <0 on failure
1681 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1682 * the PHY to 1000 Mbps
1685 spider_net_setup_phy(struct spider_net_card
*card
)
1687 struct mii_phy
*phy
= &card
->phy
;
1689 spider_net_write_reg(card
, SPIDER_NET_GDTDMASEL
,
1690 SPIDER_NET_DMASEL_VALUE
);
1691 spider_net_write_reg(card
, SPIDER_NET_GPCCTRL
,
1692 SPIDER_NET_PHY_CTRL_VALUE
);
1694 phy
->dev
= card
->netdev
;
1695 phy
->mdio_read
= spider_net_read_phy
;
1696 phy
->mdio_write
= spider_net_write_phy
;
1698 mii_phy_probe(phy
, phy
->mii_id
);
1700 if (phy
->def
->ops
->setup_forced
)
1701 phy
->def
->ops
->setup_forced(phy
, SPEED_1000
, DUPLEX_FULL
);
1703 phy
->def
->ops
->enable_fiber(phy
);
1705 phy
->def
->ops
->read_link(phy
);
1706 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy
->def
->name
,
1707 phy
->speed
, phy
->duplex
==1 ? "Full" : "Half");
1713 * spider_net_download_firmware - loads firmware into the adapter
1714 * @card: card structure
1715 * @firmware_ptr: pointer to firmware data
1717 * spider_net_download_firmware loads the firmware data into the
1718 * adapter. It assumes the length etc. to be allright.
1721 spider_net_download_firmware(struct spider_net_card
*card
,
1722 const void *firmware_ptr
)
1725 const u32
*fw_ptr
= firmware_ptr
;
1727 /* stop sequencers */
1728 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1729 SPIDER_NET_STOP_SEQ_VALUE
);
1731 for (sequencer
= 0; sequencer
< SPIDER_NET_FIRMWARE_SEQS
;
1733 spider_net_write_reg(card
,
1734 SPIDER_NET_GSnPRGADR
+ sequencer
* 8, 0);
1735 for (i
= 0; i
< SPIDER_NET_FIRMWARE_SEQWORDS
; i
++) {
1736 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1737 sequencer
* 8, *fw_ptr
);
1742 if (spider_net_read_reg(card
, SPIDER_NET_GSINIT
))
1745 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1746 SPIDER_NET_RUN_SEQ_VALUE
);
1752 * spider_net_init_firmware - reads in firmware parts
1753 * @card: card structure
1755 * Returns 0 on success, <0 on failure
1757 * spider_net_init_firmware opens the sequencer firmware and does some basic
1758 * checks. This function opens and releases the firmware structure. A call
1759 * to download the firmware is performed before the release.
1763 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1764 * the program for each sequencer. Use the command
1765 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1766 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1767 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1769 * to generate spider_fw.bin, if you have sequencer programs with something
1770 * like the following contents for each sequencer:
1771 * <ONE LINE COMMENT>
1772 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1773 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1775 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1778 spider_net_init_firmware(struct spider_net_card
*card
)
1780 struct firmware
*firmware
= NULL
;
1781 struct device_node
*dn
;
1782 const u8
*fw_prop
= NULL
;
1786 if (request_firmware((const struct firmware
**)&firmware
,
1787 SPIDER_NET_FIRMWARE_NAME
, &card
->pdev
->dev
) == 0) {
1788 if ( (firmware
->size
!= SPIDER_NET_FIRMWARE_LEN
) &&
1789 netif_msg_probe(card
) ) {
1790 pr_err("Incorrect size of spidernet firmware in " \
1791 "filesystem. Looking in host firmware...\n");
1794 err
= spider_net_download_firmware(card
, firmware
->data
);
1796 release_firmware(firmware
);
1804 dn
= pci_device_to_OF_node(card
->pdev
);
1808 fw_prop
= get_property(dn
, "firmware", &fw_size
);
1812 if ( (fw_size
!= SPIDER_NET_FIRMWARE_LEN
) &&
1813 netif_msg_probe(card
) ) {
1814 pr_err("Incorrect size of spidernet firmware in " \
1819 err
= spider_net_download_firmware(card
, fw_prop
);
1824 if (netif_msg_probe(card
))
1825 pr_err("Couldn't find spidernet firmware in filesystem " \
1826 "or host firmware\n");
1831 * spider_net_workaround_rxramfull - work around firmware bug
1832 * @card: card structure
1837 spider_net_workaround_rxramfull(struct spider_net_card
*card
)
1839 int i
, sequencer
= 0;
1842 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1843 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1845 /* empty sequencer data */
1846 for (sequencer
= 0; sequencer
< SPIDER_NET_FIRMWARE_SEQS
;
1848 spider_net_write_reg(card
, SPIDER_NET_GSnPRGADR
+
1849 sequencer
* 8, 0x0);
1850 for (i
= 0; i
< SPIDER_NET_FIRMWARE_SEQWORDS
; i
++) {
1851 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1852 sequencer
* 8, 0x0);
1856 /* set sequencer operation */
1857 spider_net_write_reg(card
, SPIDER_NET_GSINIT
, 0x000000fe);
1860 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1861 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1865 * spider_net_stop - called upon ifconfig down
1866 * @netdev: interface device structure
1871 spider_net_stop(struct net_device
*netdev
)
1873 struct spider_net_card
*card
= netdev_priv(netdev
);
1875 tasklet_kill(&card
->rxram_full_tl
);
1876 netif_poll_disable(netdev
);
1877 netif_carrier_off(netdev
);
1878 netif_stop_queue(netdev
);
1879 del_timer_sync(&card
->tx_timer
);
1881 /* disable/mask all interrupts */
1882 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, 0);
1883 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
, 0);
1884 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
, 0);
1886 /* free_irq(netdev->irq, netdev);*/
1887 free_irq(to_pci_dev(netdev
->class_dev
.dev
)->irq
, netdev
);
1889 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
1890 SPIDER_NET_DMA_TX_FEND_VALUE
);
1892 /* turn off DMA, force end */
1893 spider_net_disable_rxdmac(card
);
1895 /* release chains */
1896 if (spin_trylock(&card
->tx_chain
.lock
)) {
1897 spider_net_release_tx_chain(card
, 1);
1898 spin_unlock(&card
->tx_chain
.lock
);
1901 spider_net_free_chain(card
, &card
->tx_chain
);
1902 spider_net_free_chain(card
, &card
->rx_chain
);
1908 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1909 * function (to be called not under interrupt status)
1910 * @data: data, is interface device structure
1912 * called as task when tx hangs, resets interface (if interface is up)
1915 spider_net_tx_timeout_task(void *data
)
1917 struct net_device
*netdev
= data
;
1918 struct spider_net_card
*card
= netdev_priv(netdev
);
1920 if (!(netdev
->flags
& IFF_UP
))
1923 netif_device_detach(netdev
);
1924 spider_net_stop(netdev
);
1926 spider_net_workaround_rxramfull(card
);
1927 spider_net_init_card(card
);
1929 if (spider_net_setup_phy(card
))
1931 if (spider_net_init_firmware(card
))
1934 spider_net_open(netdev
);
1935 spider_net_kick_tx_dma(card
);
1936 netif_device_attach(netdev
);
1939 atomic_dec(&card
->tx_timeout_task_counter
);
1943 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1944 * @netdev: interface device structure
1946 * called, if tx hangs. Schedules a task that resets the interface
1949 spider_net_tx_timeout(struct net_device
*netdev
)
1951 struct spider_net_card
*card
;
1953 card
= netdev_priv(netdev
);
1954 atomic_inc(&card
->tx_timeout_task_counter
);
1955 if (netdev
->flags
& IFF_UP
)
1956 schedule_work(&card
->tx_timeout_task
);
1958 atomic_dec(&card
->tx_timeout_task_counter
);
1959 card
->spider_stats
.tx_timeouts
++;
1963 * spider_net_setup_netdev_ops - initialization of net_device operations
1964 * @netdev: net_device structure
1966 * fills out function pointers in the net_device structure
1969 spider_net_setup_netdev_ops(struct net_device
*netdev
)
1971 netdev
->open
= &spider_net_open
;
1972 netdev
->stop
= &spider_net_stop
;
1973 netdev
->hard_start_xmit
= &spider_net_xmit
;
1974 netdev
->get_stats
= &spider_net_get_stats
;
1975 netdev
->set_multicast_list
= &spider_net_set_multi
;
1976 netdev
->set_mac_address
= &spider_net_set_mac
;
1977 netdev
->change_mtu
= &spider_net_change_mtu
;
1978 netdev
->do_ioctl
= &spider_net_do_ioctl
;
1980 netdev
->tx_timeout
= &spider_net_tx_timeout
;
1981 netdev
->watchdog_timeo
= SPIDER_NET_WATCHDOG_TIMEOUT
;
1983 netdev
->poll
= &spider_net_poll
;
1984 netdev
->weight
= SPIDER_NET_NAPI_WEIGHT
;
1986 netdev
->vlan_rx_register
= &spider_net_vlan_rx_reg
;
1987 netdev
->vlan_rx_add_vid
= &spider_net_vlan_rx_add
;
1988 netdev
->vlan_rx_kill_vid
= &spider_net_vlan_rx_kill
;
1989 #ifdef CONFIG_NET_POLL_CONTROLLER
1990 /* poll controller */
1991 netdev
->poll_controller
= &spider_net_poll_controller
;
1992 #endif /* CONFIG_NET_POLL_CONTROLLER */
1994 netdev
->ethtool_ops
= &spider_net_ethtool_ops
;
1998 * spider_net_setup_netdev - initialization of net_device
1999 * @card: card structure
2001 * Returns 0 on success or <0 on failure
2003 * spider_net_setup_netdev initializes the net_device structure
2006 spider_net_setup_netdev(struct spider_net_card
*card
)
2009 struct net_device
*netdev
= card
->netdev
;
2010 struct device_node
*dn
;
2011 struct sockaddr addr
;
2014 SET_MODULE_OWNER(netdev
);
2015 SET_NETDEV_DEV(netdev
, &card
->pdev
->dev
);
2017 pci_set_drvdata(card
->pdev
, netdev
);
2019 card
->rxram_full_tl
.data
= (unsigned long) card
;
2020 card
->rxram_full_tl
.func
=
2021 (void (*)(unsigned long)) spider_net_handle_rxram_full
;
2022 init_timer(&card
->tx_timer
);
2023 card
->tx_timer
.function
=
2024 (void (*)(unsigned long)) spider_net_cleanup_tx_ring
;
2025 card
->tx_timer
.data
= (unsigned long) card
;
2026 netdev
->irq
= card
->pdev
->irq
;
2028 card
->options
.rx_csum
= SPIDER_NET_RX_CSUM_DEFAULT
;
2030 card
->tx_desc
= tx_descriptors
;
2031 card
->rx_desc
= rx_descriptors
;
2033 spider_net_setup_netdev_ops(netdev
);
2035 netdev
->features
= NETIF_F_HW_CSUM
| NETIF_F_LLTX
;
2036 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2037 * NETIF_F_HW_VLAN_FILTER */
2039 netdev
->irq
= card
->pdev
->irq
;
2041 dn
= pci_device_to_OF_node(card
->pdev
);
2045 mac
= get_property(dn
, "local-mac-address", NULL
);
2048 memcpy(addr
.sa_data
, mac
, ETH_ALEN
);
2050 result
= spider_net_set_mac(netdev
, &addr
);
2051 if ((result
) && (netif_msg_probe(card
)))
2052 pr_err("Failed to set MAC address: %i\n", result
);
2054 result
= register_netdev(netdev
);
2056 if (netif_msg_probe(card
))
2057 pr_err("Couldn't register net_device: %i\n",
2062 if (netif_msg_probe(card
))
2063 pr_info("Initialized device %s.\n", netdev
->name
);
2069 * spider_net_alloc_card - allocates net_device and card structure
2071 * returns the card structure or NULL in case of errors
2073 * the card and net_device structures are linked to each other
2075 static struct spider_net_card
*
2076 spider_net_alloc_card(void)
2078 struct net_device
*netdev
;
2079 struct spider_net_card
*card
;
2082 alloc_size
= sizeof (*card
) +
2083 sizeof (struct spider_net_descr
) * rx_descriptors
+
2084 sizeof (struct spider_net_descr
) * tx_descriptors
;
2085 netdev
= alloc_etherdev(alloc_size
);
2089 card
= netdev_priv(netdev
);
2090 card
->netdev
= netdev
;
2091 card
->msg_enable
= SPIDER_NET_DEFAULT_MSG
;
2092 INIT_WORK(&card
->tx_timeout_task
, spider_net_tx_timeout_task
, netdev
);
2093 init_waitqueue_head(&card
->waitq
);
2094 atomic_set(&card
->tx_timeout_task_counter
, 0);
2100 * spider_net_undo_pci_setup - releases PCI ressources
2101 * @card: card structure
2103 * spider_net_undo_pci_setup releases the mapped regions
2106 spider_net_undo_pci_setup(struct spider_net_card
*card
)
2108 iounmap(card
->regs
);
2109 pci_release_regions(card
->pdev
);
2113 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2114 * @card: card structure
2117 * Returns the card structure or NULL if any errors occur
2119 * spider_net_setup_pci_dev initializes pdev and together with the
2120 * functions called in spider_net_open configures the device so that
2121 * data can be transferred over it
2122 * The net_device structure is attached to the card structure, if the
2123 * function returns without error.
2125 static struct spider_net_card
*
2126 spider_net_setup_pci_dev(struct pci_dev
*pdev
)
2128 struct spider_net_card
*card
;
2129 unsigned long mmio_start
, mmio_len
;
2131 if (pci_enable_device(pdev
)) {
2132 pr_err("Couldn't enable PCI device\n");
2136 if (!(pci_resource_flags(pdev
, 0) & IORESOURCE_MEM
)) {
2137 pr_err("Couldn't find proper PCI device base address.\n");
2138 goto out_disable_dev
;
2141 if (pci_request_regions(pdev
, spider_net_driver_name
)) {
2142 pr_err("Couldn't obtain PCI resources, aborting.\n");
2143 goto out_disable_dev
;
2146 pci_set_master(pdev
);
2148 card
= spider_net_alloc_card();
2150 pr_err("Couldn't allocate net_device structure, "
2152 goto out_release_regions
;
2156 /* fetch base address and length of first resource */
2157 mmio_start
= pci_resource_start(pdev
, 0);
2158 mmio_len
= pci_resource_len(pdev
, 0);
2160 card
->netdev
->mem_start
= mmio_start
;
2161 card
->netdev
->mem_end
= mmio_start
+ mmio_len
;
2162 card
->regs
= ioremap(mmio_start
, mmio_len
);
2165 pr_err("Couldn't obtain PCI resources, aborting.\n");
2166 goto out_release_regions
;
2171 out_release_regions
:
2172 pci_release_regions(pdev
);
2174 pci_disable_device(pdev
);
2175 pci_set_drvdata(pdev
, NULL
);
2180 * spider_net_probe - initialization of a device
2182 * @ent: entry in the device id list
2184 * Returns 0 on success, <0 on failure
2186 * spider_net_probe initializes pdev and registers a net_device
2187 * structure for it. After that, the device can be ifconfig'ed up
2189 static int __devinit
2190 spider_net_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2193 struct spider_net_card
*card
;
2195 card
= spider_net_setup_pci_dev(pdev
);
2199 spider_net_workaround_rxramfull(card
);
2200 spider_net_init_card(card
);
2202 err
= spider_net_setup_phy(card
);
2206 err
= spider_net_init_firmware(card
);
2210 err
= spider_net_setup_netdev(card
);
2217 spider_net_undo_pci_setup(card
);
2218 free_netdev(card
->netdev
);
2224 * spider_net_remove - removal of a device
2227 * Returns 0 on success, <0 on failure
2229 * spider_net_remove is called to remove the device and unregisters the
2232 static void __devexit
2233 spider_net_remove(struct pci_dev
*pdev
)
2235 struct net_device
*netdev
;
2236 struct spider_net_card
*card
;
2238 netdev
= pci_get_drvdata(pdev
);
2239 card
= netdev_priv(netdev
);
2241 wait_event(card
->waitq
,
2242 atomic_read(&card
->tx_timeout_task_counter
) == 0);
2244 unregister_netdev(netdev
);
2246 /* switch off card */
2247 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2248 SPIDER_NET_CKRCTRL_STOP_VALUE
);
2249 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2250 SPIDER_NET_CKRCTRL_RUN_VALUE
);
2252 spider_net_undo_pci_setup(card
);
2253 free_netdev(netdev
);
2256 static struct pci_driver spider_net_driver
= {
2257 .name
= spider_net_driver_name
,
2258 .id_table
= spider_net_pci_tbl
,
2259 .probe
= spider_net_probe
,
2260 .remove
= __devexit_p(spider_net_remove
)
2264 * spider_net_init - init function when the driver is loaded
2266 * spider_net_init registers the device driver
2268 static int __init
spider_net_init(void)
2270 printk(KERN_INFO
"Spidernet version %s.\n", VERSION
);
2272 if (rx_descriptors
< SPIDER_NET_RX_DESCRIPTORS_MIN
) {
2273 rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_MIN
;
2274 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors
);
2276 if (rx_descriptors
> SPIDER_NET_RX_DESCRIPTORS_MAX
) {
2277 rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_MAX
;
2278 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors
);
2280 if (tx_descriptors
< SPIDER_NET_TX_DESCRIPTORS_MIN
) {
2281 tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_MIN
;
2282 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors
);
2284 if (tx_descriptors
> SPIDER_NET_TX_DESCRIPTORS_MAX
) {
2285 tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_MAX
;
2286 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors
);
2289 return pci_register_driver(&spider_net_driver
);
2293 * spider_net_cleanup - exit function when driver is unloaded
2295 * spider_net_cleanup unregisters the device driver
2297 static void __exit
spider_net_cleanup(void)
2299 pci_unregister_driver(&spider_net_driver
);
2302 module_init(spider_net_init
);
2303 module_exit(spider_net_cleanup
);