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");
59 static int rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_DEFAULT
;
60 static int tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_DEFAULT
;
62 module_param(rx_descriptors
, int, 0644);
63 module_param(tx_descriptors
, int, 0644);
65 MODULE_PARM_DESC(rx_descriptors
, "number of descriptors used " \
67 MODULE_PARM_DESC(tx_descriptors
, "number of descriptors used " \
70 char spider_net_driver_name
[] = "spidernet";
72 static struct pci_device_id spider_net_pci_tbl
[] = {
73 { PCI_VENDOR_ID_TOSHIBA_2
, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET
,
74 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0UL },
78 MODULE_DEVICE_TABLE(pci
, spider_net_pci_tbl
);
81 * spider_net_read_reg - reads an SMMIO register of a card
82 * @card: device structure
83 * @reg: register to read from
85 * returns the content of the specified SMMIO register.
88 spider_net_read_reg(struct spider_net_card
*card
, u32 reg
)
92 value
= readl(card
->regs
+ reg
);
93 value
= le32_to_cpu(value
);
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 value
= cpu_to_le32(value
);
108 writel(value
, card
->regs
+ reg
);
111 /** spider_net_write_phy - write to phy register
112 * @netdev: adapter to be written to
115 * @val: value to be written to phy register
117 * spider_net_write_phy_register writes to an arbitrary PHY
118 * register via the spider GPCWOPCMD register. We assume the queue does
119 * not run full (not more than 15 commands outstanding).
122 spider_net_write_phy(struct net_device
*netdev
, int mii_id
,
125 struct spider_net_card
*card
= netdev_priv(netdev
);
128 writevalue
= ((u32
)mii_id
<< 21) |
129 ((u32
)reg
<< 16) | ((u32
)val
);
131 spider_net_write_reg(card
, SPIDER_NET_GPCWOPCMD
, writevalue
);
134 /** spider_net_read_phy - read from phy register
135 * @netdev: network device to be read from
139 * Returns value read from PHY register
141 * spider_net_write_phy reads from an arbitrary PHY
142 * register via the spider GPCROPCMD register
145 spider_net_read_phy(struct net_device
*netdev
, int mii_id
, int reg
)
147 struct spider_net_card
*card
= netdev_priv(netdev
);
150 readvalue
= ((u32
)mii_id
<< 21) | ((u32
)reg
<< 16);
151 spider_net_write_reg(card
, SPIDER_NET_GPCROPCMD
, readvalue
);
153 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
154 * interrupt, as we poll for the completion of the read operation
155 * in spider_net_read_phy. Should take about 50 us */
157 readvalue
= spider_net_read_reg(card
, SPIDER_NET_GPCROPCMD
);
158 } while (readvalue
& SPIDER_NET_GPREXEC
);
160 readvalue
&= SPIDER_NET_GPRDAT_MASK
;
166 * spider_net_rx_irq_off - switch off rx irq on this spider card
167 * @card: device structure
169 * switches off rx irq by masking them out in the GHIINTnMSK register
172 spider_net_rx_irq_off(struct spider_net_card
*card
)
176 regvalue
= SPIDER_NET_INT0_MASK_VALUE
& (~SPIDER_NET_RXINT
);
177 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
181 * spider_net_rx_irq_on - switch on rx irq on this spider card
182 * @card: device structure
184 * switches on rx irq by enabling them in the GHIINTnMSK register
187 spider_net_rx_irq_on(struct spider_net_card
*card
)
191 regvalue
= SPIDER_NET_INT0_MASK_VALUE
| SPIDER_NET_RXINT
;
192 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
196 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
197 * @card: card structure
199 * spider_net_set_promisc sets the unicast destination address filter and
200 * thus either allows for non-promisc mode or promisc mode
203 spider_net_set_promisc(struct spider_net_card
*card
)
206 struct net_device
*netdev
= card
->netdev
;
208 if (netdev
->flags
& IFF_PROMISC
) {
209 /* clear destination entry 0 */
210 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, 0);
211 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, 0);
212 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
213 SPIDER_NET_PROMISC_VALUE
);
215 macu
= netdev
->dev_addr
[0];
217 macu
|= netdev
->dev_addr
[1];
218 memcpy(&macl
, &netdev
->dev_addr
[2], sizeof(macl
));
220 macu
|= SPIDER_NET_UA_DESCR_VALUE
;
221 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, macu
);
222 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, macl
);
223 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
224 SPIDER_NET_NONPROMISC_VALUE
);
229 * spider_net_get_mac_address - read mac address from spider card
230 * @card: device structure
232 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
235 spider_net_get_mac_address(struct net_device
*netdev
)
237 struct spider_net_card
*card
= netdev_priv(netdev
);
240 macl
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACL
);
241 macu
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACU
);
243 netdev
->dev_addr
[0] = (macu
>> 24) & 0xff;
244 netdev
->dev_addr
[1] = (macu
>> 16) & 0xff;
245 netdev
->dev_addr
[2] = (macu
>> 8) & 0xff;
246 netdev
->dev_addr
[3] = macu
& 0xff;
247 netdev
->dev_addr
[4] = (macl
>> 8) & 0xff;
248 netdev
->dev_addr
[5] = macl
& 0xff;
250 if (!is_valid_ether_addr(&netdev
->dev_addr
[0]))
257 * spider_net_get_descr_status -- returns the status of a descriptor
258 * @descr: descriptor to look at
260 * returns the status as in the dmac_cmd_status field of the descriptor
263 spider_net_get_descr_status(struct spider_net_descr
*descr
)
265 return descr
->dmac_cmd_status
& SPIDER_NET_DESCR_IND_PROC_MASK
;
269 * spider_net_free_chain - free descriptor chain
270 * @card: card structure
271 * @chain: address of chain
275 spider_net_free_chain(struct spider_net_card
*card
,
276 struct spider_net_descr_chain
*chain
)
278 struct spider_net_descr
*descr
;
280 for (descr
= chain
->tail
; !descr
->bus_addr
; descr
= descr
->next
) {
281 pci_unmap_single(card
->pdev
, descr
->bus_addr
,
282 SPIDER_NET_DESCR_SIZE
, PCI_DMA_BIDIRECTIONAL
);
288 * spider_net_init_chain - links descriptor chain
289 * @card: card structure
290 * @chain: address of chain
291 * @start_descr: address of descriptor array
292 * @no: number of descriptors
294 * we manage a circular list that mirrors the hardware structure,
295 * except that the hardware uses bus addresses.
297 * returns 0 on success, <0 on failure
300 spider_net_init_chain(struct spider_net_card
*card
,
301 struct spider_net_descr_chain
*chain
,
302 struct spider_net_descr
*start_descr
,
303 int direction
, int no
)
306 struct spider_net_descr
*descr
;
310 memset(descr
, 0, sizeof(*descr
) * no
);
312 /* set up the hardware pointers in each descriptor */
313 for (i
=0; i
<no
; i
++, descr
++) {
314 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
316 buf
= pci_map_single(card
->pdev
, descr
,
317 SPIDER_NET_DESCR_SIZE
,
320 if (buf
== DMA_ERROR_CODE
)
323 descr
->bus_addr
= buf
;
324 descr
->next
= descr
+ 1;
325 descr
->prev
= descr
- 1;
328 /* do actual circular list */
329 (descr
-1)->next
= start_descr
;
330 start_descr
->prev
= descr
-1;
333 if (direction
== PCI_DMA_FROMDEVICE
)
334 for (i
=0; i
< no
; i
++, descr
++)
335 descr
->next_descr_addr
= descr
->next
->bus_addr
;
337 spin_lock_init(&chain
->lock
);
338 chain
->head
= start_descr
;
339 chain
->tail
= start_descr
;
345 for (i
=0; i
< no
; i
++, descr
++)
347 pci_unmap_single(card
->pdev
, descr
->bus_addr
,
348 SPIDER_NET_DESCR_SIZE
,
354 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
355 * @card: card structure
357 * returns 0 on success, <0 on failure
360 spider_net_free_rx_chain_contents(struct spider_net_card
*card
)
362 struct spider_net_descr
*descr
;
364 descr
= card
->rx_chain
.head
;
365 while (descr
->next
!= card
->rx_chain
.head
) {
367 dev_kfree_skb(descr
->skb
);
368 pci_unmap_single(card
->pdev
, descr
->buf_addr
,
369 SPIDER_NET_MAX_FRAME
,
377 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
378 * @card: card structure
379 * @descr: descriptor to re-init
381 * return 0 on succes, <0 on failure
383 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
384 * Activate the descriptor state-wise
387 spider_net_prepare_rx_descr(struct spider_net_card
*card
,
388 struct spider_net_descr
*descr
)
395 /* we need to round up the buffer size to a multiple of 128 */
396 bufsize
= (SPIDER_NET_MAX_FRAME
+ SPIDER_NET_RXBUF_ALIGN
- 1) &
397 (~(SPIDER_NET_RXBUF_ALIGN
- 1));
399 /* and we need to have it 128 byte aligned, therefore we allocate a
401 /* allocate an skb */
402 descr
->skb
= dev_alloc_skb(bufsize
+ SPIDER_NET_RXBUF_ALIGN
- 1);
404 if (netif_msg_rx_err(card
) && net_ratelimit())
405 pr_err("Not enough memory to allocate rx buffer\n");
408 descr
->buf_size
= bufsize
;
409 descr
->result_size
= 0;
410 descr
->valid_size
= 0;
411 descr
->data_status
= 0;
412 descr
->data_error
= 0;
414 offset
= ((unsigned long)descr
->skb
->data
) &
415 (SPIDER_NET_RXBUF_ALIGN
- 1);
417 skb_reserve(descr
->skb
, SPIDER_NET_RXBUF_ALIGN
- offset
);
418 /* io-mmu-map the skb */
419 buf
= pci_map_single(card
->pdev
, descr
->skb
->data
,
420 SPIDER_NET_MAX_FRAME
, PCI_DMA_FROMDEVICE
);
421 descr
->buf_addr
= buf
;
422 if (buf
== DMA_ERROR_CODE
) {
423 dev_kfree_skb_any(descr
->skb
);
424 if (netif_msg_rx_err(card
) && net_ratelimit())
425 pr_err("Could not iommu-map rx buffer\n");
426 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
428 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_CARDOWNED
|
429 SPIDER_NET_DMAC_NOINTR_COMPLETE
;
436 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
437 * @card: card structure
439 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
440 * chip by writing to the appropriate register. DMA is enabled in
441 * spider_net_enable_rxdmac.
444 spider_net_enable_rxchtails(struct spider_net_card
*card
)
446 /* assume chain is aligned correctly */
447 spider_net_write_reg(card
, SPIDER_NET_GDADCHA
,
448 card
->rx_chain
.tail
->bus_addr
);
452 * spider_net_enable_rxdmac - enables a receive DMA controller
453 * @card: card structure
455 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
456 * in the GDADMACCNTR register
459 spider_net_enable_rxdmac(struct spider_net_card
*card
)
462 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
463 SPIDER_NET_DMA_RX_VALUE
);
467 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
468 * @card: card structure
470 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
473 spider_net_refill_rx_chain(struct spider_net_card
*card
)
475 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
478 /* one context doing the refill (and a second context seeing that
479 * and omitting it) is ok. If called by NAPI, we'll be called again
480 * as spider_net_decode_one_descr is called several times. If some
481 * interrupt calls us, the NAPI is about to clean up anyway. */
482 if (!spin_trylock_irqsave(&chain
->lock
, flags
))
485 while (spider_net_get_descr_status(chain
->head
) ==
486 SPIDER_NET_DESCR_NOT_IN_USE
) {
487 if (spider_net_prepare_rx_descr(card
, chain
->head
))
489 chain
->head
= chain
->head
->next
;
492 spin_unlock_irqrestore(&chain
->lock
, flags
);
496 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
497 * @card: card structure
499 * returns 0 on success, <0 on failure
502 spider_net_alloc_rx_skbs(struct spider_net_card
*card
)
505 struct spider_net_descr_chain
*chain
;
509 chain
= &card
->rx_chain
;
510 /* put at least one buffer into the chain. if this fails,
511 * we've got a problem. if not, spider_net_refill_rx_chain
512 * will do the rest at the end of this function */
513 if (spider_net_prepare_rx_descr(card
, chain
->head
))
516 chain
->head
= chain
->head
->next
;
518 /* this will allocate the rest of the rx buffers; if not, it's
519 * business as usual later on */
520 spider_net_refill_rx_chain(card
);
521 spider_net_enable_rxdmac(card
);
525 spider_net_free_rx_chain_contents(card
);
530 * spider_net_get_multicast_hash - generates hash for multicast filter table
531 * @addr: multicast address
533 * returns the hash value.
535 * spider_net_get_multicast_hash calculates a hash value for a given multicast
536 * address, that is used to set the multicast filter tables
539 spider_net_get_multicast_hash(struct net_device
*netdev
, __u8
*addr
)
543 char addr_for_crc
[ETH_ALEN
] = { 0, };
546 for (i
= 0; i
< ETH_ALEN
* 8; i
++) {
547 bit
= (addr
[i
/ 8] >> (i
% 8)) & 1;
548 addr_for_crc
[ETH_ALEN
- 1 - i
/ 8] += bit
<< (7 - (i
% 8));
551 crc
= crc32_be(~0, addr_for_crc
, netdev
->addr_len
);
562 * spider_net_set_multi - sets multicast addresses and promisc flags
563 * @netdev: interface device structure
565 * spider_net_set_multi configures multicast addresses as needed for the
566 * netdev interface. It also sets up multicast, allmulti and promisc
567 * flags appropriately
570 spider_net_set_multi(struct net_device
*netdev
)
572 struct dev_mc_list
*mc
;
576 struct spider_net_card
*card
= netdev_priv(netdev
);
577 unsigned long bitmask
[SPIDER_NET_MULTICAST_HASHES
/ BITS_PER_LONG
] =
580 spider_net_set_promisc(card
);
582 if (netdev
->flags
& IFF_ALLMULTI
) {
583 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
; i
++) {
589 /* well, we know, what the broadcast hash value is: it's xfd
590 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
591 set_bit(0xfd, bitmask
);
593 for (mc
= netdev
->mc_list
; mc
; mc
= mc
->next
) {
594 hash
= spider_net_get_multicast_hash(netdev
, mc
->dmi_addr
);
595 set_bit(hash
, bitmask
);
599 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
/ 4; i
++) {
601 if (test_bit(i
* 4, bitmask
))
604 if (test_bit(i
* 4 + 1, bitmask
))
607 if (test_bit(i
* 4 + 2, bitmask
))
610 if (test_bit(i
* 4 + 3, bitmask
))
613 spider_net_write_reg(card
, SPIDER_NET_GMRMHFILnR
+ i
* 4, reg
);
618 * spider_net_disable_rxdmac - disables the receive DMA controller
619 * @card: card structure
621 * spider_net_disable_rxdmac terminates processing on the DMA controller by
622 * turing off DMA and issueing a force end
625 spider_net_disable_rxdmac(struct spider_net_card
*card
)
627 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
628 SPIDER_NET_DMA_RX_FEND_VALUE
);
632 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
633 * @card: card structure
634 * @descr: descriptor structure to fill out
635 * @skb: packet to use
637 * returns 0 on success, <0 on failure.
639 * fills out the descriptor structure with skb data and len. Copies data,
640 * if needed (32bit DMA!)
643 spider_net_prepare_tx_descr(struct spider_net_card
*card
,
646 struct spider_net_descr
*descr
= card
->tx_chain
.head
;
649 buf
= pci_map_single(card
->pdev
, skb
->data
, skb
->len
, PCI_DMA_TODEVICE
);
650 if (buf
== DMA_ERROR_CODE
) {
651 if (netif_msg_tx_err(card
) && net_ratelimit())
652 pr_err("could not iommu-map packet (%p, %i). "
653 "Dropping packet\n", skb
->data
, skb
->len
);
657 descr
->buf_addr
= buf
;
658 descr
->buf_size
= skb
->len
;
659 descr
->next_descr_addr
= 0;
661 descr
->data_status
= 0;
663 descr
->dmac_cmd_status
=
664 SPIDER_NET_DESCR_CARDOWNED
| SPIDER_NET_DMAC_NOCS
;
665 if (skb
->protocol
== htons(ETH_P_IP
))
666 switch (skb
->nh
.iph
->protocol
) {
668 descr
->dmac_cmd_status
|= SPIDER_NET_DMAC_TCP
;
671 descr
->dmac_cmd_status
|= SPIDER_NET_DMAC_UDP
;
675 descr
->prev
->next_descr_addr
= descr
->bus_addr
;
681 * spider_net_release_tx_descr - processes a used tx descriptor
682 * @card: card structure
683 * @descr: descriptor to release
685 * releases a used tx descriptor (unmapping, freeing of skb)
688 spider_net_release_tx_descr(struct spider_net_card
*card
)
690 struct spider_net_descr
*descr
= card
->tx_chain
.tail
;
693 card
->tx_chain
.tail
= card
->tx_chain
.tail
->next
;
694 descr
->dmac_cmd_status
|= SPIDER_NET_DESCR_NOT_IN_USE
;
698 pci_unmap_single(card
->pdev
, descr
->buf_addr
, skb
->len
,
700 dev_kfree_skb_any(skb
);
704 * spider_net_release_tx_chain - processes sent tx descriptors
705 * @card: adapter structure
706 * @brutal: if set, don't care about whether descriptor seems to be in use
708 * returns 0 if the tx ring is empty, otherwise 1.
710 * spider_net_release_tx_chain releases the tx descriptors that spider has
711 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
712 * If some other context is calling this function, we return 1 so that we're
713 * scheduled again (if we were scheduled) and will not loose initiative.
716 spider_net_release_tx_chain(struct spider_net_card
*card
, int brutal
)
718 struct spider_net_descr_chain
*chain
= &card
->tx_chain
;
721 spider_net_read_reg(card
, SPIDER_NET_GDTDMACCNTR
);
723 while (chain
->tail
!= chain
->head
) {
724 status
= spider_net_get_descr_status(chain
->tail
);
726 case SPIDER_NET_DESCR_COMPLETE
:
727 card
->netdev_stats
.tx_packets
++;
728 card
->netdev_stats
.tx_bytes
+= chain
->tail
->skb
->len
;
731 case SPIDER_NET_DESCR_CARDOWNED
:
734 /* fallthrough, if we release the descriptors
735 * brutally (then we don't care about
736 * SPIDER_NET_DESCR_CARDOWNED) */
738 case SPIDER_NET_DESCR_RESPONSE_ERROR
:
739 case SPIDER_NET_DESCR_PROTECTION_ERROR
:
740 case SPIDER_NET_DESCR_FORCE_END
:
741 if (netif_msg_tx_err(card
))
742 pr_err("%s: forcing end of tx descriptor "
743 "with status x%02x\n",
744 card
->netdev
->name
, status
);
745 card
->netdev_stats
.tx_errors
++;
749 card
->netdev_stats
.tx_dropped
++;
752 spider_net_release_tx_descr(card
);
759 * spider_net_kick_tx_dma - enables TX DMA processing
760 * @card: card structure
761 * @descr: descriptor address to enable TX processing at
763 * spider_net_kick_tx_dma writes the current tx chain head as start address
764 * of the tx descriptor chain and enables the transmission DMA engine
767 spider_net_kick_tx_dma(struct spider_net_card
*card
)
769 struct spider_net_descr
*descr
;
771 if (spider_net_read_reg(card
, SPIDER_NET_GDTDMACCNTR
) &
772 SPIDER_NET_TX_DMA_EN
)
775 descr
= card
->tx_chain
.tail
;
777 if (spider_net_get_descr_status(descr
) ==
778 SPIDER_NET_DESCR_CARDOWNED
) {
779 spider_net_write_reg(card
, SPIDER_NET_GDTDCHA
,
781 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
782 SPIDER_NET_DMA_TX_VALUE
);
785 if (descr
== card
->tx_chain
.head
)
791 mod_timer(&card
->tx_timer
, jiffies
+ SPIDER_NET_TX_TIMER
);
795 * spider_net_xmit - transmits a frame over the device
796 * @skb: packet to send out
797 * @netdev: interface device structure
799 * returns 0 on success, !0 on failure
802 spider_net_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
804 struct spider_net_card
*card
= netdev_priv(netdev
);
805 struct spider_net_descr_chain
*chain
= &card
->tx_chain
;
806 struct spider_net_descr
*descr
= chain
->head
;
810 spin_lock_irqsave(&chain
->lock
, flags
);
812 spider_net_release_tx_chain(card
, 0);
814 if (chain
->head
->next
== chain
->tail
->prev
) {
815 card
->netdev_stats
.tx_dropped
++;
816 result
= NETDEV_TX_LOCKED
;
820 if (spider_net_get_descr_status(descr
) != SPIDER_NET_DESCR_NOT_IN_USE
) {
821 result
= NETDEV_TX_LOCKED
;
825 if (spider_net_prepare_tx_descr(card
, skb
) != 0) {
826 card
->netdev_stats
.tx_dropped
++;
827 result
= NETDEV_TX_BUSY
;
831 result
= NETDEV_TX_OK
;
833 spider_net_kick_tx_dma(card
);
834 card
->tx_chain
.head
= card
->tx_chain
.head
->next
;
837 spin_unlock_irqrestore(&chain
->lock
, flags
);
838 netif_wake_queue(netdev
);
843 * spider_net_cleanup_tx_ring - cleans up the TX ring
844 * @card: card structure
846 * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
847 * interrupts to cleanup our TX ring) and returns sent packets to the stack
851 spider_net_cleanup_tx_ring(struct spider_net_card
*card
)
855 spin_lock_irqsave(&card
->tx_chain
.lock
, flags
);
857 if ((spider_net_release_tx_chain(card
, 0) != 0) &&
858 (card
->netdev
->flags
& IFF_UP
))
859 spider_net_kick_tx_dma(card
);
861 spin_unlock_irqrestore(&card
->tx_chain
.lock
, flags
);
865 * spider_net_do_ioctl - called for device ioctls
866 * @netdev: interface device structure
867 * @ifr: request parameter structure for ioctl
868 * @cmd: command code for ioctl
870 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
871 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
874 spider_net_do_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
883 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
884 * @descr: descriptor to process
885 * @card: card structure
886 * @napi: whether caller is in NAPI context
888 * returns 1 on success, 0 if no packet was passed to the stack
890 * iommu-unmaps the skb, fills out skb structure and passes the data to the
891 * stack. The descriptor state is not changed.
894 spider_net_pass_skb_up(struct spider_net_descr
*descr
,
895 struct spider_net_card
*card
, int napi
)
898 struct net_device
*netdev
;
899 u32 data_status
, data_error
;
901 data_status
= descr
->data_status
;
902 data_error
= descr
->data_error
;
904 netdev
= card
->netdev
;
906 /* unmap descriptor */
907 pci_unmap_single(card
->pdev
, descr
->buf_addr
, SPIDER_NET_MAX_FRAME
,
910 /* the cases we'll throw away the packet immediately */
911 if (data_error
& SPIDER_NET_DESTROY_RX_FLAGS
) {
912 if (netif_msg_rx_err(card
))
913 pr_err("error in received descriptor found, "
914 "data_status=x%08x, data_error=x%08x\n",
915 data_status
, data_error
);
921 skb_put(skb
, descr
->valid_size
);
923 /* the card seems to add 2 bytes of junk in front
924 * of the ethernet frame */
925 #define SPIDER_MISALIGN 2
926 skb_pull(skb
, SPIDER_MISALIGN
);
927 skb
->protocol
= eth_type_trans(skb
, netdev
);
929 /* checksum offload */
930 if (card
->options
.rx_csum
) {
931 if ( ( (data_status
& SPIDER_NET_DATA_STATUS_CKSUM_MASK
) ==
932 SPIDER_NET_DATA_STATUS_CKSUM_MASK
) &&
933 !(data_error
& SPIDER_NET_DATA_ERR_CKSUM_MASK
))
934 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
936 skb
->ip_summed
= CHECKSUM_NONE
;
938 skb
->ip_summed
= CHECKSUM_NONE
;
940 if (data_status
& SPIDER_NET_VLAN_PACKET
) {
941 /* further enhancements: HW-accel VLAN
942 * vlan_hwaccel_receive_skb
946 /* pass skb up to stack */
948 netif_receive_skb(skb
);
952 /* update netdevice statistics */
953 card
->netdev_stats
.rx_packets
++;
954 card
->netdev_stats
.rx_bytes
+= skb
->len
;
960 * spider_net_decode_one_descr - processes an rx descriptor
961 * @card: card structure
962 * @napi: whether caller is in NAPI context
964 * returns 1 if a packet has been sent to the stack, otherwise 0
966 * processes an rx descriptor by iommu-unmapping the data buffer and passing
967 * the packet up to the stack. This function is called in softirq
968 * context, e.g. either bottom half from interrupt or NAPI polling context
971 spider_net_decode_one_descr(struct spider_net_card
*card
, int napi
)
973 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
974 struct spider_net_descr
*descr
= chain
->tail
;
978 status
= spider_net_get_descr_status(descr
);
980 if (status
== SPIDER_NET_DESCR_CARDOWNED
) {
981 /* nothing in the descriptor yet */
986 if (status
== SPIDER_NET_DESCR_NOT_IN_USE
) {
987 /* not initialized yet, the ring must be empty */
988 spider_net_refill_rx_chain(card
);
989 spider_net_enable_rxdmac(card
);
994 /* descriptor definitively used -- move on tail */
995 chain
->tail
= descr
->next
;
998 if ( (status
== SPIDER_NET_DESCR_RESPONSE_ERROR
) ||
999 (status
== SPIDER_NET_DESCR_PROTECTION_ERROR
) ||
1000 (status
== SPIDER_NET_DESCR_FORCE_END
) ) {
1001 if (netif_msg_rx_err(card
))
1002 pr_err("%s: dropping RX descriptor with state %d\n",
1003 card
->netdev
->name
, status
);
1004 card
->netdev_stats
.rx_dropped
++;
1005 pci_unmap_single(card
->pdev
, descr
->buf_addr
,
1006 SPIDER_NET_MAX_FRAME
, PCI_DMA_FROMDEVICE
);
1007 dev_kfree_skb_irq(descr
->skb
);
1011 if ( (status
!= SPIDER_NET_DESCR_COMPLETE
) &&
1012 (status
!= SPIDER_NET_DESCR_FRAME_END
) ) {
1013 if (netif_msg_rx_err(card
))
1014 pr_err("%s: RX descriptor with state %d\n",
1015 card
->netdev
->name
, status
);
1019 /* ok, we've got a packet in descr */
1020 result
= spider_net_pass_skb_up(descr
, card
, napi
);
1022 descr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
1023 /* change the descriptor state: */
1025 spider_net_refill_rx_chain(card
);
1031 * spider_net_poll - NAPI poll function called by the stack to return packets
1032 * @netdev: interface device structure
1033 * @budget: number of packets we can pass to the stack at most
1035 * returns 0 if no more packets available to the driver/stack. Returns 1,
1036 * if the quota is exceeded, but the driver has still packets.
1038 * spider_net_poll returns all packets from the rx descriptors to the stack
1039 * (using netif_receive_skb). If all/enough packets are up, the driver
1040 * reenables interrupts and returns 0. If not, 1 is returned.
1043 spider_net_poll(struct net_device
*netdev
, int *budget
)
1045 struct spider_net_card
*card
= netdev_priv(netdev
);
1046 int packets_to_do
, packets_done
= 0;
1047 int no_more_packets
= 0;
1049 packets_to_do
= min(*budget
, netdev
->quota
);
1051 while (packets_to_do
) {
1052 if (spider_net_decode_one_descr(card
, 1)) {
1056 /* no more packets for the stack */
1057 no_more_packets
= 1;
1062 netdev
->quota
-= packets_done
;
1063 *budget
-= packets_done
;
1064 spider_net_refill_rx_chain(card
);
1066 /* if all packets are in the stack, enable interrupts and return 0 */
1067 /* if not, return 1 */
1068 if (no_more_packets
) {
1069 netif_rx_complete(netdev
);
1070 spider_net_rx_irq_on(card
);
1078 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1079 * @netdev: interface device structure
1080 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1083 spider_net_vlan_rx_reg(struct net_device
*netdev
, struct vlan_group
*grp
)
1085 /* further enhancement... yet to do */
1090 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1091 * @netdev: interface device structure
1092 * @vid: VLAN id to add
1095 spider_net_vlan_rx_add(struct net_device
*netdev
, uint16_t vid
)
1097 /* further enhancement... yet to do */
1098 /* add vid to card's VLAN filter table */
1103 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1104 * @netdev: interface device structure
1105 * @vid: VLAN id to remove
1108 spider_net_vlan_rx_kill(struct net_device
*netdev
, uint16_t vid
)
1110 /* further enhancement... yet to do */
1111 /* remove vid from card's VLAN filter table */
1115 * spider_net_get_stats - get interface statistics
1116 * @netdev: interface device structure
1118 * returns the interface statistics residing in the spider_net_card struct
1120 static struct net_device_stats
*
1121 spider_net_get_stats(struct net_device
*netdev
)
1123 struct spider_net_card
*card
= netdev_priv(netdev
);
1124 struct net_device_stats
*stats
= &card
->netdev_stats
;
1129 * spider_net_change_mtu - changes the MTU of an interface
1130 * @netdev: interface device structure
1131 * @new_mtu: new MTU value
1133 * returns 0 on success, <0 on failure
1136 spider_net_change_mtu(struct net_device
*netdev
, int new_mtu
)
1138 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1139 * and mtu is outbound only anyway */
1140 if ( (new_mtu
< SPIDER_NET_MIN_MTU
) ||
1141 (new_mtu
> SPIDER_NET_MAX_MTU
) )
1143 netdev
->mtu
= new_mtu
;
1148 * spider_net_set_mac - sets the MAC of an interface
1149 * @netdev: interface device structure
1150 * @ptr: pointer to new MAC address
1152 * Returns 0 on success, <0 on failure. Currently, we don't support this
1153 * and will always return EOPNOTSUPP.
1156 spider_net_set_mac(struct net_device
*netdev
, void *p
)
1158 struct spider_net_card
*card
= netdev_priv(netdev
);
1159 u32 macl
, macu
, regvalue
;
1160 struct sockaddr
*addr
= p
;
1162 if (!is_valid_ether_addr(addr
->sa_data
))
1163 return -EADDRNOTAVAIL
;
1165 /* switch off GMACTPE and GMACRPE */
1166 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1167 regvalue
&= ~((1 << 5) | (1 << 6));
1168 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1171 macu
= (addr
->sa_data
[0]<<24) + (addr
->sa_data
[1]<<16) +
1172 (addr
->sa_data
[2]<<8) + (addr
->sa_data
[3]);
1173 macl
= (addr
->sa_data
[4]<<8) + (addr
->sa_data
[5]);
1174 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACU
, macu
);
1175 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACL
, macl
);
1177 /* switch GMACTPE and GMACRPE back on */
1178 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1179 regvalue
|= ((1 << 5) | (1 << 6));
1180 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1182 spider_net_set_promisc(card
);
1184 /* look up, whether we have been successful */
1185 if (spider_net_get_mac_address(netdev
))
1186 return -EADDRNOTAVAIL
;
1187 if (memcmp(netdev
->dev_addr
,addr
->sa_data
,netdev
->addr_len
))
1188 return -EADDRNOTAVAIL
;
1194 * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
1195 * @card: card structure
1197 * spider_net_handle_rxram_full empties the RX ring so that spider can put
1198 * more packets in it and empty its RX RAM. This is called in bottom half
1202 spider_net_handle_rxram_full(struct spider_net_card
*card
)
1204 while (spider_net_decode_one_descr(card
, 0))
1206 spider_net_enable_rxchtails(card
);
1207 spider_net_enable_rxdmac(card
);
1208 netif_rx_schedule(card
->netdev
);
1212 * spider_net_handle_error_irq - handles errors raised by an interrupt
1213 * @card: card structure
1214 * @status_reg: interrupt status register 0 (GHIINT0STS)
1216 * spider_net_handle_error_irq treats or ignores all error conditions
1217 * found when an interrupt is presented
1220 spider_net_handle_error_irq(struct spider_net_card
*card
, u32 status_reg
)
1222 u32 error_reg1
, error_reg2
;
1226 error_reg1
= spider_net_read_reg(card
, SPIDER_NET_GHIINT1STS
);
1227 error_reg2
= spider_net_read_reg(card
, SPIDER_NET_GHIINT2STS
);
1229 /* check GHIINT0STS ************************************/
1231 for (i
= 0; i
< 32; i
++)
1232 if (status_reg
& (1<<i
))
1235 /* let error_reg1 and error_reg2 evaluation decide, what to do
1236 case SPIDER_NET_PHYINT:
1237 case SPIDER_NET_GMAC2INT:
1238 case SPIDER_NET_GMAC1INT:
1239 case SPIDER_NET_GIPSINT:
1240 case SPIDER_NET_GFIFOINT:
1241 case SPIDER_NET_DMACINT:
1242 case SPIDER_NET_GSYSINT:
1245 case SPIDER_NET_GPWOPCMPINT
:
1246 /* PHY write operation completed */
1249 case SPIDER_NET_GPROPCMPINT
:
1250 /* PHY read operation completed */
1251 /* we don't use semaphores, as we poll for the completion
1252 * of the read operation in spider_net_read_phy. Should take
1256 case SPIDER_NET_GPWFFINT
:
1257 /* PHY command queue full */
1258 if (netif_msg_intr(card
))
1259 pr_err("PHY write queue full\n");
1263 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1264 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1265 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1267 case SPIDER_NET_GDTDEN0INT
:
1268 /* someone has set TX_DMA_EN to 0 */
1272 case SPIDER_NET_GDDDEN0INT
: /* fallthrough */
1273 case SPIDER_NET_GDCDEN0INT
: /* fallthrough */
1274 case SPIDER_NET_GDBDEN0INT
: /* fallthrough */
1275 case SPIDER_NET_GDADEN0INT
:
1276 /* someone has set RX_DMA_EN to 0 */
1281 case SPIDER_NET_GDDFDCINT
:
1282 case SPIDER_NET_GDCFDCINT
:
1283 case SPIDER_NET_GDBFDCINT
:
1284 case SPIDER_NET_GDAFDCINT
:
1285 /* case SPIDER_NET_GDNMINT: not used. print a message */
1286 /* case SPIDER_NET_GCNMINT: not used. print a message */
1287 /* case SPIDER_NET_GBNMINT: not used. print a message */
1288 /* case SPIDER_NET_GANMINT: not used. print a message */
1289 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1294 case SPIDER_NET_GDTFDCINT
:
1297 case SPIDER_NET_GTTEDINT
:
1300 case SPIDER_NET_GDTDCEINT
:
1301 /* chain end. If a descriptor should be sent, kick off
1303 if (card->tx_chain.tail == card->tx_chain.head)
1304 spider_net_kick_tx_dma(card);
1308 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1309 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1312 /* check GHIINT1STS ************************************/
1314 for (i
= 0; i
< 32; i
++)
1315 if (error_reg1
& (1<<i
))
1318 case SPIDER_NET_GTMFLLINT
:
1319 if (netif_msg_intr(card
) && net_ratelimit())
1320 pr_err("Spider TX RAM full\n");
1323 case SPIDER_NET_GRFDFLLINT
: /* fallthrough */
1324 case SPIDER_NET_GRFCFLLINT
: /* fallthrough */
1325 case SPIDER_NET_GRFBFLLINT
: /* fallthrough */
1326 case SPIDER_NET_GRFAFLLINT
: /* fallthrough */
1327 case SPIDER_NET_GRMFLLINT
:
1328 if (netif_msg_intr(card
) && net_ratelimit())
1329 pr_debug("Spider RX RAM full, incoming packets "
1330 "might be discarded!\n");
1331 spider_net_rx_irq_off(card
);
1332 tasklet_schedule(&card
->rxram_full_tl
);
1336 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1337 case SPIDER_NET_GDTINVDINT
:
1338 /* allrighty. tx from previous descr ok */
1343 case SPIDER_NET_GDDDCEINT
: /* fallthrough */
1344 case SPIDER_NET_GDCDCEINT
: /* fallthrough */
1345 case SPIDER_NET_GDBDCEINT
: /* fallthrough */
1346 case SPIDER_NET_GDADCEINT
:
1347 if (netif_msg_intr(card
))
1348 pr_err("got descriptor chain end interrupt, "
1349 "restarting DMAC %c.\n",
1350 'D'+i
-SPIDER_NET_GDDDCEINT
);
1351 spider_net_refill_rx_chain(card
);
1352 spider_net_enable_rxdmac(card
);
1356 /* invalid descriptor */
1357 case SPIDER_NET_GDDINVDINT
: /* fallthrough */
1358 case SPIDER_NET_GDCINVDINT
: /* fallthrough */
1359 case SPIDER_NET_GDBINVDINT
: /* fallthrough */
1360 case SPIDER_NET_GDAINVDINT
:
1361 /* could happen when rx chain is full */
1362 spider_net_refill_rx_chain(card
);
1363 spider_net_enable_rxdmac(card
);
1367 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1368 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1369 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1370 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1371 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1372 /* case SPIDER_NET_GDSERINT: problem, print a message */
1373 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1374 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1375 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1376 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1377 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1383 /* check GHIINT2STS ************************************/
1385 for (i
= 0; i
< 32; i
++)
1386 if (error_reg2
& (1<<i
))
1389 /* there is nothing we can (want to) do at this time. Log a
1390 * message, we can switch on and off the specific values later on
1391 case SPIDER_NET_GPROPERINT:
1392 case SPIDER_NET_GMCTCRSNGINT:
1393 case SPIDER_NET_GMCTLCOLINT:
1394 case SPIDER_NET_GMCTTMOTINT:
1395 case SPIDER_NET_GMCRCAERINT:
1396 case SPIDER_NET_GMCRCALERINT:
1397 case SPIDER_NET_GMCRALNERINT:
1398 case SPIDER_NET_GMCROVRINT:
1399 case SPIDER_NET_GMCRRNTINT:
1400 case SPIDER_NET_GMCRRXERINT:
1401 case SPIDER_NET_GTITCSERINT:
1402 case SPIDER_NET_GTIFMTERINT:
1403 case SPIDER_NET_GTIPKTRVKINT:
1404 case SPIDER_NET_GTISPINGINT:
1405 case SPIDER_NET_GTISADNGINT:
1406 case SPIDER_NET_GTISPDNGINT:
1407 case SPIDER_NET_GRIFMTERINT:
1408 case SPIDER_NET_GRIPKTRVKINT:
1409 case SPIDER_NET_GRISPINGINT:
1410 case SPIDER_NET_GRISADNGINT:
1411 case SPIDER_NET_GRISPDNGINT:
1418 if ((show_error
) && (netif_msg_intr(card
)))
1419 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1420 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1421 status_reg
, error_reg1
, error_reg2
);
1423 /* clear interrupt sources */
1424 spider_net_write_reg(card
, SPIDER_NET_GHIINT1STS
, error_reg1
);
1425 spider_net_write_reg(card
, SPIDER_NET_GHIINT2STS
, error_reg2
);
1429 * spider_net_interrupt - interrupt handler for spider_net
1430 * @irq: interupt number
1431 * @ptr: pointer to net_device
1432 * @regs: PU registers
1434 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1435 * interrupt found raised by card.
1437 * This is the interrupt handler, that turns off
1438 * interrupts for this device and makes the stack poll the driver
1441 spider_net_interrupt(int irq
, void *ptr
, struct pt_regs
*regs
)
1443 struct net_device
*netdev
= ptr
;
1444 struct spider_net_card
*card
= netdev_priv(netdev
);
1447 status_reg
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0STS
);
1452 if (status_reg
& SPIDER_NET_RXINT
) {
1453 spider_net_rx_irq_off(card
);
1454 netif_rx_schedule(netdev
);
1457 if (status_reg
& SPIDER_NET_ERRINT
)
1458 spider_net_handle_error_irq(card
, status_reg
);
1460 /* clear interrupt sources */
1461 spider_net_write_reg(card
, SPIDER_NET_GHIINT0STS
, status_reg
);
1466 #ifdef CONFIG_NET_POLL_CONTROLLER
1468 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1469 * @netdev: interface device structure
1471 * see Documentation/networking/netconsole.txt
1474 spider_net_poll_controller(struct net_device
*netdev
)
1476 disable_irq(netdev
->irq
);
1477 spider_net_interrupt(netdev
->irq
, netdev
, NULL
);
1478 enable_irq(netdev
->irq
);
1480 #endif /* CONFIG_NET_POLL_CONTROLLER */
1483 * spider_net_init_card - initializes the card
1484 * @card: card structure
1486 * spider_net_init_card initializes the card so that other registers can
1490 spider_net_init_card(struct spider_net_card
*card
)
1492 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1493 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1495 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1496 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1500 * spider_net_enable_card - enables the card by setting all kinds of regs
1501 * @card: card structure
1503 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1506 spider_net_enable_card(struct spider_net_card
*card
)
1509 /* the following array consists of (register),(value) pairs
1510 * that are set in this function. A register of 0 ends the list */
1512 { SPIDER_NET_GRESUMINTNUM
, 0 },
1513 { SPIDER_NET_GREINTNUM
, 0 },
1515 /* set interrupt frame number registers */
1516 /* clear the single DMA engine registers first */
1517 { SPIDER_NET_GFAFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1518 { SPIDER_NET_GFBFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1519 { SPIDER_NET_GFCFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1520 { SPIDER_NET_GFDFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1521 /* then set, what we really need */
1522 { SPIDER_NET_GFFRMNUM
, SPIDER_NET_FRAMENUM_VALUE
},
1524 /* timer counter registers and stuff */
1525 { SPIDER_NET_GFREECNNUM
, 0 },
1526 { SPIDER_NET_GONETIMENUM
, 0 },
1527 { SPIDER_NET_GTOUTFRMNUM
, 0 },
1529 /* RX mode setting */
1530 { SPIDER_NET_GRXMDSET
, SPIDER_NET_RXMODE_VALUE
},
1531 /* TX mode setting */
1532 { SPIDER_NET_GTXMDSET
, SPIDER_NET_TXMODE_VALUE
},
1533 /* IPSEC mode setting */
1534 { SPIDER_NET_GIPSECINIT
, SPIDER_NET_IPSECINIT_VALUE
},
1536 { SPIDER_NET_GFTRESTRT
, SPIDER_NET_RESTART_VALUE
},
1538 { SPIDER_NET_GMRWOLCTRL
, 0 },
1539 { SPIDER_NET_GTESTMD
, 0x10000000 },
1540 { SPIDER_NET_GTTQMSK
, 0x00400040 },
1542 { SPIDER_NET_GMACINTEN
, 0 },
1544 /* flow control stuff */
1545 { SPIDER_NET_GMACAPAUSE
, SPIDER_NET_MACAPAUSE_VALUE
},
1546 { SPIDER_NET_GMACTXPAUSE
, SPIDER_NET_TXPAUSE_VALUE
},
1548 { SPIDER_NET_GMACBSTLMT
, SPIDER_NET_BURSTLMT_VALUE
},
1553 while (regs
[i
][0]) {
1554 spider_net_write_reg(card
, regs
[i
][0], regs
[i
][1]);
1558 /* clear unicast filter table entries 1 to 14 */
1559 for (i
= 1; i
<= 14; i
++) {
1560 spider_net_write_reg(card
,
1561 SPIDER_NET_GMRUAFILnR
+ i
* 8,
1563 spider_net_write_reg(card
,
1564 SPIDER_NET_GMRUAFILnR
+ i
* 8 + 4,
1568 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
, 0x08080000);
1570 spider_net_write_reg(card
, SPIDER_NET_ECMODE
, SPIDER_NET_ECMODE_VALUE
);
1572 /* set chain tail adress for RX chains and
1574 spider_net_enable_rxchtails(card
);
1575 spider_net_enable_rxdmac(card
);
1577 spider_net_write_reg(card
, SPIDER_NET_GRXDMAEN
, SPIDER_NET_WOL_VALUE
);
1579 spider_net_write_reg(card
, SPIDER_NET_GMACLENLMT
,
1580 SPIDER_NET_LENLMT_VALUE
);
1581 spider_net_write_reg(card
, SPIDER_NET_GMACMODE
,
1582 SPIDER_NET_MACMODE_VALUE
);
1583 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
,
1584 SPIDER_NET_OPMODE_VALUE
);
1586 /* set interrupt mask registers */
1587 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
,
1588 SPIDER_NET_INT0_MASK_VALUE
);
1589 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
,
1590 SPIDER_NET_INT1_MASK_VALUE
);
1591 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
,
1592 SPIDER_NET_INT2_MASK_VALUE
);
1594 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
1595 SPIDER_NET_GDTDCEIDIS
);
1599 * spider_net_open - called upon ifonfig up
1600 * @netdev: interface device structure
1602 * returns 0 on success, <0 on failure
1604 * spider_net_open allocates all the descriptors and memory needed for
1605 * operation, sets up multicast list and enables interrupts
1608 spider_net_open(struct net_device
*netdev
)
1610 struct spider_net_card
*card
= netdev_priv(netdev
);
1614 if (spider_net_init_chain(card
, &card
->tx_chain
, card
->descr
,
1615 PCI_DMA_TODEVICE
, card
->tx_desc
))
1616 goto alloc_tx_failed
;
1617 if (spider_net_init_chain(card
, &card
->rx_chain
,
1618 card
->descr
+ card
->rx_desc
,
1619 PCI_DMA_FROMDEVICE
, card
->rx_desc
))
1620 goto alloc_rx_failed
;
1622 /* allocate rx skbs */
1623 if (spider_net_alloc_rx_skbs(card
))
1624 goto alloc_skbs_failed
;
1626 spider_net_set_multi(netdev
);
1628 /* further enhancement: setup hw vlan, if needed */
1631 if (request_irq(netdev
->irq
, spider_net_interrupt
,
1632 IRQF_SHARED
, netdev
->name
, netdev
))
1633 goto register_int_failed
;
1635 spider_net_enable_card(card
);
1637 netif_start_queue(netdev
);
1638 netif_carrier_on(netdev
);
1639 netif_poll_enable(netdev
);
1643 register_int_failed
:
1644 spider_net_free_rx_chain_contents(card
);
1646 spider_net_free_chain(card
, &card
->rx_chain
);
1648 spider_net_free_chain(card
, &card
->tx_chain
);
1654 * spider_net_setup_phy - setup PHY
1655 * @card: card structure
1657 * returns 0 on success, <0 on failure
1659 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1660 * the PHY to 1000 Mbps
1663 spider_net_setup_phy(struct spider_net_card
*card
)
1665 struct mii_phy
*phy
= &card
->phy
;
1667 spider_net_write_reg(card
, SPIDER_NET_GDTDMASEL
,
1668 SPIDER_NET_DMASEL_VALUE
);
1669 spider_net_write_reg(card
, SPIDER_NET_GPCCTRL
,
1670 SPIDER_NET_PHY_CTRL_VALUE
);
1672 phy
->dev
= card
->netdev
;
1673 phy
->mdio_read
= spider_net_read_phy
;
1674 phy
->mdio_write
= spider_net_write_phy
;
1676 mii_phy_probe(phy
, phy
->mii_id
);
1678 if (phy
->def
->ops
->setup_forced
)
1679 phy
->def
->ops
->setup_forced(phy
, SPEED_1000
, DUPLEX_FULL
);
1681 phy
->def
->ops
->enable_fiber(phy
);
1683 phy
->def
->ops
->read_link(phy
);
1684 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy
->def
->name
,
1685 phy
->speed
, phy
->duplex
==1 ? "Full" : "Half");
1691 * spider_net_download_firmware - loads firmware into the adapter
1692 * @card: card structure
1693 * @firmware_ptr: pointer to firmware data
1695 * spider_net_download_firmware loads the firmware data into the
1696 * adapter. It assumes the length etc. to be allright.
1699 spider_net_download_firmware(struct spider_net_card
*card
,
1703 u32
*fw_ptr
= (u32
*)firmware_ptr
;
1705 /* stop sequencers */
1706 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1707 SPIDER_NET_STOP_SEQ_VALUE
);
1709 for (sequencer
= 0; sequencer
< SPIDER_NET_FIRMWARE_SEQS
;
1711 spider_net_write_reg(card
,
1712 SPIDER_NET_GSnPRGADR
+ sequencer
* 8, 0);
1713 for (i
= 0; i
< SPIDER_NET_FIRMWARE_SEQWORDS
; i
++) {
1714 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1715 sequencer
* 8, *fw_ptr
);
1720 if (spider_net_read_reg(card
, SPIDER_NET_GSINIT
))
1723 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1724 SPIDER_NET_RUN_SEQ_VALUE
);
1730 * spider_net_init_firmware - reads in firmware parts
1731 * @card: card structure
1733 * Returns 0 on success, <0 on failure
1735 * spider_net_init_firmware opens the sequencer firmware and does some basic
1736 * checks. This function opens and releases the firmware structure. A call
1737 * to download the firmware is performed before the release.
1741 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1742 * the program for each sequencer. Use the command
1743 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1744 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1745 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1747 * to generate spider_fw.bin, if you have sequencer programs with something
1748 * like the following contents for each sequencer:
1749 * <ONE LINE COMMENT>
1750 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1751 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1753 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1756 spider_net_init_firmware(struct spider_net_card
*card
)
1758 struct firmware
*firmware
= NULL
;
1759 struct device_node
*dn
;
1764 if (request_firmware((const struct firmware
**)&firmware
,
1765 SPIDER_NET_FIRMWARE_NAME
, &card
->pdev
->dev
) == 0) {
1766 if ( (firmware
->size
!= SPIDER_NET_FIRMWARE_LEN
) &&
1767 netif_msg_probe(card
) ) {
1768 pr_err("Incorrect size of spidernet firmware in " \
1769 "filesystem. Looking in host firmware...\n");
1772 err
= spider_net_download_firmware(card
, firmware
->data
);
1774 release_firmware(firmware
);
1782 dn
= pci_device_to_OF_node(card
->pdev
);
1786 fw_prop
= (u8
*)get_property(dn
, "firmware", &fw_size
);
1790 if ( (fw_size
!= SPIDER_NET_FIRMWARE_LEN
) &&
1791 netif_msg_probe(card
) ) {
1792 pr_err("Incorrect size of spidernet firmware in " \
1797 err
= spider_net_download_firmware(card
, fw_prop
);
1802 if (netif_msg_probe(card
))
1803 pr_err("Couldn't find spidernet firmware in filesystem " \
1804 "or host firmware\n");
1809 * spider_net_workaround_rxramfull - work around firmware bug
1810 * @card: card structure
1815 spider_net_workaround_rxramfull(struct spider_net_card
*card
)
1817 int i
, sequencer
= 0;
1820 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1821 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1823 /* empty sequencer data */
1824 for (sequencer
= 0; sequencer
< SPIDER_NET_FIRMWARE_SEQS
;
1826 spider_net_write_reg(card
, SPIDER_NET_GSnPRGADR
+
1827 sequencer
* 8, 0x0);
1828 for (i
= 0; i
< SPIDER_NET_FIRMWARE_SEQWORDS
; i
++) {
1829 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1830 sequencer
* 8, 0x0);
1834 /* set sequencer operation */
1835 spider_net_write_reg(card
, SPIDER_NET_GSINIT
, 0x000000fe);
1838 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1839 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1843 * spider_net_stop - called upon ifconfig down
1844 * @netdev: interface device structure
1849 spider_net_stop(struct net_device
*netdev
)
1851 struct spider_net_card
*card
= netdev_priv(netdev
);
1853 tasklet_kill(&card
->rxram_full_tl
);
1854 netif_poll_disable(netdev
);
1855 netif_carrier_off(netdev
);
1856 netif_stop_queue(netdev
);
1857 del_timer_sync(&card
->tx_timer
);
1859 /* disable/mask all interrupts */
1860 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, 0);
1861 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
, 0);
1862 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
, 0);
1864 /* free_irq(netdev->irq, netdev);*/
1865 free_irq(to_pci_dev(netdev
->class_dev
.dev
)->irq
, netdev
);
1867 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
1868 SPIDER_NET_DMA_TX_FEND_VALUE
);
1870 /* turn off DMA, force end */
1871 spider_net_disable_rxdmac(card
);
1873 /* release chains */
1874 if (spin_trylock(&card
->tx_chain
.lock
)) {
1875 spider_net_release_tx_chain(card
, 1);
1876 spin_unlock(&card
->tx_chain
.lock
);
1879 spider_net_free_chain(card
, &card
->tx_chain
);
1880 spider_net_free_chain(card
, &card
->rx_chain
);
1886 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1887 * function (to be called not under interrupt status)
1888 * @data: data, is interface device structure
1890 * called as task when tx hangs, resets interface (if interface is up)
1893 spider_net_tx_timeout_task(void *data
)
1895 struct net_device
*netdev
= data
;
1896 struct spider_net_card
*card
= netdev_priv(netdev
);
1898 if (!(netdev
->flags
& IFF_UP
))
1901 netif_device_detach(netdev
);
1902 spider_net_stop(netdev
);
1904 spider_net_workaround_rxramfull(card
);
1905 spider_net_init_card(card
);
1907 if (spider_net_setup_phy(card
))
1909 if (spider_net_init_firmware(card
))
1912 spider_net_open(netdev
);
1913 spider_net_kick_tx_dma(card
);
1914 netif_device_attach(netdev
);
1917 atomic_dec(&card
->tx_timeout_task_counter
);
1921 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1922 * @netdev: interface device structure
1924 * called, if tx hangs. Schedules a task that resets the interface
1927 spider_net_tx_timeout(struct net_device
*netdev
)
1929 struct spider_net_card
*card
;
1931 card
= netdev_priv(netdev
);
1932 atomic_inc(&card
->tx_timeout_task_counter
);
1933 if (netdev
->flags
& IFF_UP
)
1934 schedule_work(&card
->tx_timeout_task
);
1936 atomic_dec(&card
->tx_timeout_task_counter
);
1940 * spider_net_setup_netdev_ops - initialization of net_device operations
1941 * @netdev: net_device structure
1943 * fills out function pointers in the net_device structure
1946 spider_net_setup_netdev_ops(struct net_device
*netdev
)
1948 netdev
->open
= &spider_net_open
;
1949 netdev
->stop
= &spider_net_stop
;
1950 netdev
->hard_start_xmit
= &spider_net_xmit
;
1951 netdev
->get_stats
= &spider_net_get_stats
;
1952 netdev
->set_multicast_list
= &spider_net_set_multi
;
1953 netdev
->set_mac_address
= &spider_net_set_mac
;
1954 netdev
->change_mtu
= &spider_net_change_mtu
;
1955 netdev
->do_ioctl
= &spider_net_do_ioctl
;
1957 netdev
->tx_timeout
= &spider_net_tx_timeout
;
1958 netdev
->watchdog_timeo
= SPIDER_NET_WATCHDOG_TIMEOUT
;
1960 netdev
->poll
= &spider_net_poll
;
1961 netdev
->weight
= SPIDER_NET_NAPI_WEIGHT
;
1963 netdev
->vlan_rx_register
= &spider_net_vlan_rx_reg
;
1964 netdev
->vlan_rx_add_vid
= &spider_net_vlan_rx_add
;
1965 netdev
->vlan_rx_kill_vid
= &spider_net_vlan_rx_kill
;
1966 #ifdef CONFIG_NET_POLL_CONTROLLER
1967 /* poll controller */
1968 netdev
->poll_controller
= &spider_net_poll_controller
;
1969 #endif /* CONFIG_NET_POLL_CONTROLLER */
1971 netdev
->ethtool_ops
= &spider_net_ethtool_ops
;
1975 * spider_net_setup_netdev - initialization of net_device
1976 * @card: card structure
1978 * Returns 0 on success or <0 on failure
1980 * spider_net_setup_netdev initializes the net_device structure
1983 spider_net_setup_netdev(struct spider_net_card
*card
)
1986 struct net_device
*netdev
= card
->netdev
;
1987 struct device_node
*dn
;
1988 struct sockaddr addr
;
1991 SET_MODULE_OWNER(netdev
);
1992 SET_NETDEV_DEV(netdev
, &card
->pdev
->dev
);
1994 pci_set_drvdata(card
->pdev
, netdev
);
1996 card
->rxram_full_tl
.data
= (unsigned long) card
;
1997 card
->rxram_full_tl
.func
=
1998 (void (*)(unsigned long)) spider_net_handle_rxram_full
;
1999 init_timer(&card
->tx_timer
);
2000 card
->tx_timer
.function
=
2001 (void (*)(unsigned long)) spider_net_cleanup_tx_ring
;
2002 card
->tx_timer
.data
= (unsigned long) card
;
2003 netdev
->irq
= card
->pdev
->irq
;
2005 card
->options
.rx_csum
= SPIDER_NET_RX_CSUM_DEFAULT
;
2007 card
->tx_desc
= tx_descriptors
;
2008 card
->rx_desc
= rx_descriptors
;
2010 spider_net_setup_netdev_ops(netdev
);
2012 netdev
->features
= NETIF_F_HW_CSUM
| NETIF_F_LLTX
;
2013 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2014 * NETIF_F_HW_VLAN_FILTER */
2016 netdev
->irq
= card
->pdev
->irq
;
2018 dn
= pci_device_to_OF_node(card
->pdev
);
2022 mac
= (u8
*)get_property(dn
, "local-mac-address", NULL
);
2025 memcpy(addr
.sa_data
, mac
, ETH_ALEN
);
2027 result
= spider_net_set_mac(netdev
, &addr
);
2028 if ((result
) && (netif_msg_probe(card
)))
2029 pr_err("Failed to set MAC address: %i\n", result
);
2031 result
= register_netdev(netdev
);
2033 if (netif_msg_probe(card
))
2034 pr_err("Couldn't register net_device: %i\n",
2039 if (netif_msg_probe(card
))
2040 pr_info("Initialized device %s.\n", netdev
->name
);
2046 * spider_net_alloc_card - allocates net_device and card structure
2048 * returns the card structure or NULL in case of errors
2050 * the card and net_device structures are linked to each other
2052 static struct spider_net_card
*
2053 spider_net_alloc_card(void)
2055 struct net_device
*netdev
;
2056 struct spider_net_card
*card
;
2059 alloc_size
= sizeof (*card
) +
2060 sizeof (struct spider_net_descr
) * rx_descriptors
+
2061 sizeof (struct spider_net_descr
) * tx_descriptors
;
2062 netdev
= alloc_etherdev(alloc_size
);
2066 card
= netdev_priv(netdev
);
2067 card
->netdev
= netdev
;
2068 card
->msg_enable
= SPIDER_NET_DEFAULT_MSG
;
2069 INIT_WORK(&card
->tx_timeout_task
, spider_net_tx_timeout_task
, netdev
);
2070 init_waitqueue_head(&card
->waitq
);
2071 atomic_set(&card
->tx_timeout_task_counter
, 0);
2077 * spider_net_undo_pci_setup - releases PCI ressources
2078 * @card: card structure
2080 * spider_net_undo_pci_setup releases the mapped regions
2083 spider_net_undo_pci_setup(struct spider_net_card
*card
)
2085 iounmap(card
->regs
);
2086 pci_release_regions(card
->pdev
);
2090 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2091 * @card: card structure
2094 * Returns the card structure or NULL if any errors occur
2096 * spider_net_setup_pci_dev initializes pdev and together with the
2097 * functions called in spider_net_open configures the device so that
2098 * data can be transferred over it
2099 * The net_device structure is attached to the card structure, if the
2100 * function returns without error.
2102 static struct spider_net_card
*
2103 spider_net_setup_pci_dev(struct pci_dev
*pdev
)
2105 struct spider_net_card
*card
;
2106 unsigned long mmio_start
, mmio_len
;
2108 if (pci_enable_device(pdev
)) {
2109 pr_err("Couldn't enable PCI device\n");
2113 if (!(pci_resource_flags(pdev
, 0) & IORESOURCE_MEM
)) {
2114 pr_err("Couldn't find proper PCI device base address.\n");
2115 goto out_disable_dev
;
2118 if (pci_request_regions(pdev
, spider_net_driver_name
)) {
2119 pr_err("Couldn't obtain PCI resources, aborting.\n");
2120 goto out_disable_dev
;
2123 pci_set_master(pdev
);
2125 card
= spider_net_alloc_card();
2127 pr_err("Couldn't allocate net_device structure, "
2129 goto out_release_regions
;
2133 /* fetch base address and length of first resource */
2134 mmio_start
= pci_resource_start(pdev
, 0);
2135 mmio_len
= pci_resource_len(pdev
, 0);
2137 card
->netdev
->mem_start
= mmio_start
;
2138 card
->netdev
->mem_end
= mmio_start
+ mmio_len
;
2139 card
->regs
= ioremap(mmio_start
, mmio_len
);
2142 pr_err("Couldn't obtain PCI resources, aborting.\n");
2143 goto out_release_regions
;
2148 out_release_regions
:
2149 pci_release_regions(pdev
);
2151 pci_disable_device(pdev
);
2152 pci_set_drvdata(pdev
, NULL
);
2157 * spider_net_probe - initialization of a device
2159 * @ent: entry in the device id list
2161 * Returns 0 on success, <0 on failure
2163 * spider_net_probe initializes pdev and registers a net_device
2164 * structure for it. After that, the device can be ifconfig'ed up
2166 static int __devinit
2167 spider_net_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2170 struct spider_net_card
*card
;
2172 card
= spider_net_setup_pci_dev(pdev
);
2176 spider_net_workaround_rxramfull(card
);
2177 spider_net_init_card(card
);
2179 err
= spider_net_setup_phy(card
);
2183 err
= spider_net_init_firmware(card
);
2187 err
= spider_net_setup_netdev(card
);
2194 spider_net_undo_pci_setup(card
);
2195 free_netdev(card
->netdev
);
2201 * spider_net_remove - removal of a device
2204 * Returns 0 on success, <0 on failure
2206 * spider_net_remove is called to remove the device and unregisters the
2209 static void __devexit
2210 spider_net_remove(struct pci_dev
*pdev
)
2212 struct net_device
*netdev
;
2213 struct spider_net_card
*card
;
2215 netdev
= pci_get_drvdata(pdev
);
2216 card
= netdev_priv(netdev
);
2218 wait_event(card
->waitq
,
2219 atomic_read(&card
->tx_timeout_task_counter
) == 0);
2221 unregister_netdev(netdev
);
2223 /* switch off card */
2224 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2225 SPIDER_NET_CKRCTRL_STOP_VALUE
);
2226 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2227 SPIDER_NET_CKRCTRL_RUN_VALUE
);
2229 spider_net_undo_pci_setup(card
);
2230 free_netdev(netdev
);
2233 static struct pci_driver spider_net_driver
= {
2234 .name
= spider_net_driver_name
,
2235 .id_table
= spider_net_pci_tbl
,
2236 .probe
= spider_net_probe
,
2237 .remove
= __devexit_p(spider_net_remove
)
2241 * spider_net_init - init function when the driver is loaded
2243 * spider_net_init registers the device driver
2245 static int __init
spider_net_init(void)
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
);