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/config.h>
26 #include <linux/compiler.h>
27 #include <linux/crc32.h>
28 #include <linux/delay.h>
29 #include <linux/etherdevice.h>
30 #include <linux/ethtool.h>
31 #include <linux/firmware.h>
32 #include <linux/if_vlan.h>
33 #include <linux/init.h>
34 #include <linux/ioport.h>
36 #include <linux/kernel.h>
37 #include <linux/mii.h>
38 #include <linux/module.h>
39 #include <linux/netdevice.h>
40 #include <linux/device.h>
41 #include <linux/pci.h>
42 #include <linux/skbuff.h>
43 #include <linux/slab.h>
44 #include <linux/tcp.h>
45 #include <linux/types.h>
46 #include <linux/wait.h>
47 #include <linux/workqueue.h>
48 #include <asm/bitops.h>
49 #include <asm/pci-bridge.h>
50 #include <net/checksum.h>
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
);
112 * spider_net_write_reg_sync - writes to an SMMIO register of a card
113 * @card: device structure
114 * @reg: register to write to
115 * @value: value to write into the specified SMMIO register
117 * Unlike spider_net_write_reg, this will also make sure the
118 * data arrives on the card by reading the reg again.
121 spider_net_write_reg_sync(struct spider_net_card
*card
, u32 reg
, u32 value
)
123 value
= cpu_to_le32(value
);
124 writel(value
, card
->regs
+ reg
);
125 (void)readl(card
->regs
+ reg
);
129 * spider_net_rx_irq_off - switch off rx irq on this spider card
130 * @card: device structure
132 * switches off rx irq by masking them out in the GHIINTnMSK register
135 spider_net_rx_irq_off(struct spider_net_card
*card
)
140 spin_lock_irqsave(&card
->intmask_lock
, flags
);
141 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0MSK
);
142 regvalue
&= ~SPIDER_NET_RXINT
;
143 spider_net_write_reg_sync(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
144 spin_unlock_irqrestore(&card
->intmask_lock
, flags
);
147 /** spider_net_write_phy - write to phy register
148 * @netdev: adapter to be written to
151 * @val: value to be written to phy register
153 * spider_net_write_phy_register writes to an arbitrary PHY
154 * register via the spider GPCWOPCMD register. We assume the queue does
155 * not run full (not more than 15 commands outstanding).
158 spider_net_write_phy(struct net_device
*netdev
, int mii_id
,
161 struct spider_net_card
*card
= netdev_priv(netdev
);
164 writevalue
= ((u32
)mii_id
<< 21) |
165 ((u32
)reg
<< 16) | ((u32
)val
);
167 spider_net_write_reg(card
, SPIDER_NET_GPCWOPCMD
, writevalue
);
170 /** spider_net_read_phy - read from phy register
171 * @netdev: network device to be read from
175 * Returns value read from PHY register
177 * spider_net_write_phy reads from an arbitrary PHY
178 * register via the spider GPCROPCMD register
181 spider_net_read_phy(struct net_device
*netdev
, int mii_id
, int reg
)
183 struct spider_net_card
*card
= netdev_priv(netdev
);
186 readvalue
= ((u32
)mii_id
<< 21) | ((u32
)reg
<< 16);
187 spider_net_write_reg(card
, SPIDER_NET_GPCROPCMD
, readvalue
);
189 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
190 * interrupt, as we poll for the completion of the read operation
191 * in spider_net_read_phy. Should take about 50 us */
193 readvalue
= spider_net_read_reg(card
, SPIDER_NET_GPCROPCMD
);
194 } while (readvalue
& SPIDER_NET_GPREXEC
);
196 readvalue
&= SPIDER_NET_GPRDAT_MASK
;
202 * spider_net_rx_irq_on - switch on rx irq on this spider card
203 * @card: device structure
205 * switches on rx irq by enabling them in the GHIINTnMSK register
208 spider_net_rx_irq_on(struct spider_net_card
*card
)
213 spin_lock_irqsave(&card
->intmask_lock
, flags
);
214 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0MSK
);
215 regvalue
|= SPIDER_NET_RXINT
;
216 spider_net_write_reg_sync(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
217 spin_unlock_irqrestore(&card
->intmask_lock
, flags
);
221 * spider_net_tx_irq_off - switch off tx irq on this spider card
222 * @card: device structure
224 * switches off tx irq by masking them out in the GHIINTnMSK register
227 spider_net_tx_irq_off(struct spider_net_card
*card
)
232 spin_lock_irqsave(&card
->intmask_lock
, flags
);
233 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0MSK
);
234 regvalue
&= ~SPIDER_NET_TXINT
;
235 spider_net_write_reg_sync(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
236 spin_unlock_irqrestore(&card
->intmask_lock
, flags
);
240 * spider_net_tx_irq_on - switch on tx irq on this spider card
241 * @card: device structure
243 * switches on tx irq by enabling them in the GHIINTnMSK register
246 spider_net_tx_irq_on(struct spider_net_card
*card
)
251 spin_lock_irqsave(&card
->intmask_lock
, flags
);
252 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0MSK
);
253 regvalue
|= SPIDER_NET_TXINT
;
254 spider_net_write_reg_sync(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
255 spin_unlock_irqrestore(&card
->intmask_lock
, flags
);
259 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
260 * @card: card structure
262 * spider_net_set_promisc sets the unicast destination address filter and
263 * thus either allows for non-promisc mode or promisc mode
266 spider_net_set_promisc(struct spider_net_card
*card
)
269 struct net_device
*netdev
= card
->netdev
;
271 if (netdev
->flags
& IFF_PROMISC
) {
272 /* clear destination entry 0 */
273 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, 0);
274 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, 0);
275 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
276 SPIDER_NET_PROMISC_VALUE
);
278 macu
= netdev
->dev_addr
[0];
280 macu
|= netdev
->dev_addr
[1];
281 memcpy(&macl
, &netdev
->dev_addr
[2], sizeof(macl
));
283 macu
|= SPIDER_NET_UA_DESCR_VALUE
;
284 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, macu
);
285 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, macl
);
286 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
287 SPIDER_NET_NONPROMISC_VALUE
);
292 * spider_net_get_mac_address - read mac address from spider card
293 * @card: device structure
295 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
298 spider_net_get_mac_address(struct net_device
*netdev
)
300 struct spider_net_card
*card
= netdev_priv(netdev
);
303 macl
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACL
);
304 macu
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACU
);
306 netdev
->dev_addr
[0] = (macu
>> 24) & 0xff;
307 netdev
->dev_addr
[1] = (macu
>> 16) & 0xff;
308 netdev
->dev_addr
[2] = (macu
>> 8) & 0xff;
309 netdev
->dev_addr
[3] = macu
& 0xff;
310 netdev
->dev_addr
[4] = (macl
>> 8) & 0xff;
311 netdev
->dev_addr
[5] = macl
& 0xff;
313 if (!is_valid_ether_addr(&netdev
->dev_addr
[0]))
320 * spider_net_get_descr_status -- returns the status of a descriptor
321 * @descr: descriptor to look at
323 * returns the status as in the dmac_cmd_status field of the descriptor
325 static enum spider_net_descr_status
326 spider_net_get_descr_status(struct spider_net_descr
*descr
)
330 cmd_status
= descr
->dmac_cmd_status
;
332 cmd_status
>>= SPIDER_NET_DESCR_IND_PROC_SHIFT
;
333 /* no need to mask out any bits, as cmd_status is 32 bits wide only
339 * spider_net_set_descr_status -- sets the status of a descriptor
340 * @descr: descriptor to change
341 * @status: status to set in the descriptor
343 * changes the status to the specified value. Doesn't change other bits
347 spider_net_set_descr_status(struct spider_net_descr
*descr
,
348 enum spider_net_descr_status status
)
351 /* read the status */
353 cmd_status
= descr
->dmac_cmd_status
;
354 /* clean the upper 4 bits */
355 cmd_status
&= SPIDER_NET_DESCR_IND_PROC_MASKO
;
356 /* add the status to it */
357 cmd_status
|= ((u32
)status
)<<SPIDER_NET_DESCR_IND_PROC_SHIFT
;
358 /* and write it back */
359 descr
->dmac_cmd_status
= cmd_status
;
364 * spider_net_free_chain - free descriptor chain
365 * @card: card structure
366 * @chain: address of chain
370 spider_net_free_chain(struct spider_net_card
*card
,
371 struct spider_net_descr_chain
*chain
)
373 struct spider_net_descr
*descr
;
375 for (descr
= chain
->tail
; !descr
->bus_addr
; descr
= descr
->next
) {
376 pci_unmap_single(card
->pdev
, descr
->bus_addr
,
377 SPIDER_NET_DESCR_SIZE
, PCI_DMA_BIDIRECTIONAL
);
383 * spider_net_init_chain - links descriptor chain
384 * @card: card structure
385 * @chain: address of chain
386 * @start_descr: address of descriptor array
387 * @no: number of descriptors
389 * we manage a circular list that mirrors the hardware structure,
390 * except that the hardware uses bus addresses.
392 * returns 0 on success, <0 on failure
395 spider_net_init_chain(struct spider_net_card
*card
,
396 struct spider_net_descr_chain
*chain
,
397 struct spider_net_descr
*start_descr
, int no
)
400 struct spider_net_descr
*descr
;
402 spin_lock_init(&card
->chain_lock
);
405 memset(descr
, 0, sizeof(*descr
) * no
);
407 /* set up the hardware pointers in each descriptor */
408 for (i
=0; i
<no
; i
++, descr
++) {
409 spider_net_set_descr_status(descr
, SPIDER_NET_DESCR_NOT_IN_USE
);
412 pci_map_single(card
->pdev
, descr
,
413 SPIDER_NET_DESCR_SIZE
,
414 PCI_DMA_BIDIRECTIONAL
);
416 if (descr
->bus_addr
== DMA_ERROR_CODE
)
419 descr
->next
= descr
+ 1;
420 descr
->prev
= descr
- 1;
423 /* do actual circular list */
424 (descr
-1)->next
= start_descr
;
425 start_descr
->prev
= descr
-1;
428 for (i
=0; i
< no
; i
++, descr
++) {
429 descr
->next_descr_addr
= descr
->next
->bus_addr
;
432 chain
->head
= start_descr
;
433 chain
->tail
= start_descr
;
439 for (i
=0; i
< no
; i
++, descr
++)
441 pci_unmap_single(card
->pdev
, descr
->bus_addr
,
442 SPIDER_NET_DESCR_SIZE
, PCI_DMA_BIDIRECTIONAL
);
447 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
448 * @card: card structure
450 * returns 0 on success, <0 on failure
453 spider_net_free_rx_chain_contents(struct spider_net_card
*card
)
455 struct spider_net_descr
*descr
;
457 descr
= card
->rx_chain
.head
;
458 while (descr
->next
!= card
->rx_chain
.head
) {
460 dev_kfree_skb(descr
->skb
);
461 pci_unmap_single(card
->pdev
, descr
->buf_addr
,
463 PCI_DMA_BIDIRECTIONAL
);
470 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
471 * @card: card structure
472 * @descr: descriptor to re-init
474 * return 0 on succes, <0 on failure
476 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
477 * Activate the descriptor state-wise
480 spider_net_prepare_rx_descr(struct spider_net_card
*card
,
481 struct spider_net_descr
*descr
)
487 /* we need to round up the buffer size to a multiple of 128 */
488 bufsize
= (SPIDER_NET_MAX_MTU
+ SPIDER_NET_RXBUF_ALIGN
- 1) &
489 (~(SPIDER_NET_RXBUF_ALIGN
- 1));
491 /* and we need to have it 128 byte aligned, therefore we allocate a
493 /* allocate an skb */
494 descr
->skb
= dev_alloc_skb(bufsize
+ SPIDER_NET_RXBUF_ALIGN
- 1);
497 if (netif_msg_rx_err(card
))
498 pr_err("Not enough memory to allocate "
502 descr
->buf_size
= bufsize
;
503 descr
->result_size
= 0;
504 descr
->valid_size
= 0;
505 descr
->data_status
= 0;
506 descr
->data_error
= 0;
508 offset
= ((unsigned long)descr
->skb
->data
) &
509 (SPIDER_NET_RXBUF_ALIGN
- 1);
511 skb_reserve(descr
->skb
, SPIDER_NET_RXBUF_ALIGN
- offset
);
512 /* io-mmu-map the skb */
513 descr
->buf_addr
= pci_map_single(card
->pdev
, descr
->skb
->data
,
515 PCI_DMA_BIDIRECTIONAL
);
516 if (descr
->buf_addr
== DMA_ERROR_CODE
) {
517 dev_kfree_skb_any(descr
->skb
);
518 if (netif_msg_rx_err(card
))
519 pr_err("Could not iommu-map rx buffer\n");
520 spider_net_set_descr_status(descr
, SPIDER_NET_DESCR_NOT_IN_USE
);
522 descr
->dmac_cmd_status
= SPIDER_NET_DMAC_RX_CARDOWNED
;
529 * spider_net_enable_rxctails - sets RX dmac chain tail addresses
530 * @card: card structure
532 * spider_net_enable_rxctails sets the RX DMAC chain tail adresses in the
533 * chip by writing to the appropriate register. DMA is enabled in
534 * spider_net_enable_rxdmac.
537 spider_net_enable_rxchtails(struct spider_net_card
*card
)
539 /* assume chain is aligned correctly */
540 spider_net_write_reg(card
, SPIDER_NET_GDADCHA
,
541 card
->rx_chain
.tail
->bus_addr
);
545 * spider_net_enable_rxdmac - enables a receive DMA controller
546 * @card: card structure
548 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
549 * in the GDADMACCNTR register
552 spider_net_enable_rxdmac(struct spider_net_card
*card
)
554 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
555 SPIDER_NET_DMA_RX_VALUE
);
559 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
560 * @card: card structure
562 * refills descriptors in all chains (last used chain first): allocates skbs
563 * and iommu-maps them.
566 spider_net_refill_rx_chain(struct spider_net_card
*card
)
568 struct spider_net_descr_chain
*chain
;
572 chain
= &card
->rx_chain
;
574 spin_lock_irqsave(&card
->chain_lock
, flags
);
575 while (spider_net_get_descr_status(chain
->head
) ==
576 SPIDER_NET_DESCR_NOT_IN_USE
) {
577 if (spider_net_prepare_rx_descr(card
, chain
->head
))
580 chain
->head
= chain
->head
->next
;
582 spin_unlock_irqrestore(&card
->chain_lock
, flags
);
584 /* could be optimized, only do that, if we know the DMA processing
587 spider_net_enable_rxdmac(card
);
591 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
592 * @card: card structure
594 * returns 0 on success, <0 on failure
597 spider_net_alloc_rx_skbs(struct spider_net_card
*card
)
600 struct spider_net_descr_chain
*chain
;
604 chain
= &card
->rx_chain
;
605 /* put at least one buffer into the chain. if this fails,
606 * we've got a problem. if not, spider_net_refill_rx_chain
607 * will do the rest at the end of this function */
608 if (spider_net_prepare_rx_descr(card
, chain
->head
))
611 chain
->head
= chain
->head
->next
;
613 /* this will allocate the rest of the rx buffers; if not, it's
614 * business as usual later on */
615 spider_net_refill_rx_chain(card
);
619 spider_net_free_rx_chain_contents(card
);
624 * spider_net_release_tx_descr - processes a used tx descriptor
625 * @card: card structure
626 * @descr: descriptor to release
628 * releases a used tx descriptor (unmapping, freeing of skb)
631 spider_net_release_tx_descr(struct spider_net_card
*card
,
632 struct spider_net_descr
*descr
)
638 pci_unmap_single(card
->pdev
, descr
->buf_addr
, skb
->len
,
639 PCI_DMA_BIDIRECTIONAL
);
641 dev_kfree_skb_any(skb
);
643 /* set status to not used */
644 spider_net_set_descr_status(descr
, SPIDER_NET_DESCR_NOT_IN_USE
);
648 * spider_net_release_tx_chain - processes sent tx descriptors
649 * @card: adapter structure
650 * @brutal: if set, don't care about whether descriptor seems to be in use
652 * releases the tx descriptors that spider has finished with (if non-brutal)
653 * or simply release tx descriptors (if brutal)
656 spider_net_release_tx_chain(struct spider_net_card
*card
, int brutal
)
658 struct spider_net_descr_chain
*tx_chain
= &card
->tx_chain
;
659 enum spider_net_descr_status status
;
661 spider_net_tx_irq_off(card
);
663 /* no lock for chain needed, if this is only executed once at a time */
666 status
= spider_net_get_descr_status(tx_chain
->tail
);
668 case SPIDER_NET_DESCR_CARDOWNED
:
669 if (!brutal
) goto out
;
670 /* fallthrough, if we release the descriptors
671 * brutally (then we don't care about
672 * SPIDER_NET_DESCR_CARDOWNED) */
673 case SPIDER_NET_DESCR_RESPONSE_ERROR
:
674 case SPIDER_NET_DESCR_PROTECTION_ERROR
:
675 case SPIDER_NET_DESCR_FORCE_END
:
676 if (netif_msg_tx_err(card
))
677 pr_err("%s: forcing end of tx descriptor "
678 "with status x%02x\n",
679 card
->netdev
->name
, status
);
680 card
->netdev_stats
.tx_dropped
++;
683 case SPIDER_NET_DESCR_COMPLETE
:
684 card
->netdev_stats
.tx_packets
++;
685 card
->netdev_stats
.tx_bytes
+=
686 tx_chain
->tail
->skb
->len
;
689 default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */
692 spider_net_release_tx_descr(card
, tx_chain
->tail
);
693 tx_chain
->tail
= tx_chain
->tail
->next
;
696 netif_wake_queue(card
->netdev
);
699 /* switch on tx irqs (while we are still in the interrupt
700 * handler, so we don't get an interrupt), check again
701 * for done descriptors. This results in fewer interrupts */
702 spider_net_tx_irq_on(card
);
703 status
= spider_net_get_descr_status(tx_chain
->tail
);
705 case SPIDER_NET_DESCR_RESPONSE_ERROR
:
706 case SPIDER_NET_DESCR_PROTECTION_ERROR
:
707 case SPIDER_NET_DESCR_FORCE_END
:
708 case SPIDER_NET_DESCR_COMPLETE
:
718 * spider_net_get_multicast_hash - generates hash for multicast filter table
719 * @addr: multicast address
721 * returns the hash value.
723 * spider_net_get_multicast_hash calculates a hash value for a given multicast
724 * address, that is used to set the multicast filter tables
727 spider_net_get_multicast_hash(struct net_device
*netdev
, __u8
*addr
)
729 /* FIXME: an addr of 01:00:5e:00:00:01 must result in 0xa9,
730 * ff:ff:ff:ff:ff:ff must result in 0xfd */
734 crc
= crc32_be(~0, addr
, netdev
->addr_len
);
744 * spider_net_set_multi - sets multicast addresses and promisc flags
745 * @netdev: interface device structure
747 * spider_net_set_multi configures multicast addresses as needed for the
748 * netdev interface. It also sets up multicast, allmulti and promisc
749 * flags appropriately
752 spider_net_set_multi(struct net_device
*netdev
)
754 struct dev_mc_list
*mc
;
758 struct spider_net_card
*card
= netdev_priv(netdev
);
759 unsigned long bitmask
[SPIDER_NET_MULTICAST_HASHES
/ BITS_PER_LONG
] =
762 spider_net_set_promisc(card
);
764 if (netdev
->flags
& IFF_ALLMULTI
) {
765 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
; i
++) {
771 /* well, we know, what the broadcast hash value is: it's xfd
772 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
773 set_bit(0xfd, bitmask
);
775 for (mc
= netdev
->mc_list
; mc
; mc
= mc
->next
) {
776 hash
= spider_net_get_multicast_hash(netdev
, mc
->dmi_addr
);
777 set_bit(hash
, bitmask
);
781 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
/ 4; i
++) {
783 if (test_bit(i
* 4, bitmask
))
786 if (test_bit(i
* 4 + 1, bitmask
))
789 if (test_bit(i
* 4 + 2, bitmask
))
792 if (test_bit(i
* 4 + 3, bitmask
))
795 spider_net_write_reg(card
, SPIDER_NET_GMRMHFILnR
+ i
* 4, reg
);
800 * spider_net_disable_rxdmac - disables the receive DMA controller
801 * @card: card structure
803 * spider_net_disable_rxdmac terminates processing on the DMA controller by
804 * turing off DMA and issueing a force end
807 spider_net_disable_rxdmac(struct spider_net_card
*card
)
809 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
810 SPIDER_NET_DMA_RX_FEND_VALUE
);
814 * spider_net_stop - called upon ifconfig down
815 * @netdev: interface device structure
820 spider_net_stop(struct net_device
*netdev
)
822 struct spider_net_card
*card
= netdev_priv(netdev
);
824 netif_poll_disable(netdev
);
825 netif_carrier_off(netdev
);
826 netif_stop_queue(netdev
);
828 /* disable/mask all interrupts */
829 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, 0);
830 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
, 0);
831 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
, 0);
833 /* free_irq(netdev->irq, netdev);*/
834 free_irq(to_pci_dev(netdev
->class_dev
.dev
)->irq
, netdev
);
836 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
837 SPIDER_NET_DMA_TX_FEND_VALUE
);
839 /* turn off DMA, force end */
840 spider_net_disable_rxdmac(card
);
843 spider_net_release_tx_chain(card
, 1);
845 spider_net_free_chain(card
, &card
->tx_chain
);
846 spider_net_free_chain(card
, &card
->rx_chain
);
852 * spider_net_get_next_tx_descr - returns the next available tx descriptor
853 * @card: device structure to get descriptor from
855 * returns the address of the next descriptor, or NULL if not available.
857 static struct spider_net_descr
*
858 spider_net_get_next_tx_descr(struct spider_net_card
*card
)
860 /* check, if head points to not-in-use descr */
861 if ( spider_net_get_descr_status(card
->tx_chain
.head
) ==
862 SPIDER_NET_DESCR_NOT_IN_USE
) {
863 return card
->tx_chain
.head
;
870 * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field
871 * @descr: descriptor structure to fill out
872 * @skb: packet to consider
874 * fills out the command and status field of the descriptor structure,
875 * depending on hardware checksum settings. This function assumes a wmb()
876 * has executed before.
879 spider_net_set_txdescr_cmdstat(struct spider_net_descr
*descr
,
882 if (skb
->ip_summed
!= CHECKSUM_HW
) {
883 descr
->dmac_cmd_status
= SPIDER_NET_DMAC_CMDSTAT_NOCS
;
888 * if yes: tcp? udp? */
889 if (skb
->protocol
== htons(ETH_P_IP
)) {
890 if (skb
->nh
.iph
->protocol
== IPPROTO_TCP
) {
891 descr
->dmac_cmd_status
= SPIDER_NET_DMAC_CMDSTAT_TCPCS
;
892 } else if (skb
->nh
.iph
->protocol
== IPPROTO_UDP
) {
893 descr
->dmac_cmd_status
= SPIDER_NET_DMAC_CMDSTAT_UDPCS
;
894 } else { /* the stack should checksum non-tcp and non-udp
895 packets on his own: NETIF_F_IP_CSUM */
896 descr
->dmac_cmd_status
= SPIDER_NET_DMAC_CMDSTAT_NOCS
;
902 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
903 * @card: card structure
904 * @descr: descriptor structure to fill out
905 * @skb: packet to use
907 * returns 0 on success, <0 on failure.
909 * fills out the descriptor structure with skb data and len. Copies data,
910 * if needed (32bit DMA!)
913 spider_net_prepare_tx_descr(struct spider_net_card
*card
,
914 struct spider_net_descr
*descr
,
917 descr
->buf_addr
= pci_map_single(card
->pdev
, skb
->data
,
918 skb
->len
, PCI_DMA_BIDIRECTIONAL
);
919 if (descr
->buf_addr
== DMA_ERROR_CODE
) {
920 if (netif_msg_tx_err(card
))
921 pr_err("could not iommu-map packet (%p, %i). "
922 "Dropping packet\n", skb
->data
, skb
->len
);
926 descr
->buf_size
= skb
->len
;
928 descr
->data_status
= 0;
930 /* make sure the above values are in memory before we change the
934 spider_net_set_txdescr_cmdstat(descr
,skb
);
940 * spider_net_kick_tx_dma - enables TX DMA processing
941 * @card: card structure
942 * @descr: descriptor address to enable TX processing at
944 * spider_net_kick_tx_dma writes the current tx chain head as start address
945 * of the tx descriptor chain and enables the transmission DMA engine
948 spider_net_kick_tx_dma(struct spider_net_card
*card
,
949 struct spider_net_descr
*descr
)
951 /* this is the only descriptor in the output chain.
954 spider_net_write_reg(card
, SPIDER_NET_GDTDCHA
,
957 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
958 SPIDER_NET_DMA_TX_VALUE
);
962 * spider_net_xmit - transmits a frame over the device
963 * @skb: packet to send out
964 * @netdev: interface device structure
966 * returns 0 on success, <0 on failure
969 spider_net_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
971 struct spider_net_card
*card
= netdev_priv(netdev
);
972 struct spider_net_descr
*descr
;
975 descr
= spider_net_get_next_tx_descr(card
);
978 netif_stop_queue(netdev
);
980 descr
= spider_net_get_next_tx_descr(card
);
984 netif_start_queue(netdev
);
987 result
= spider_net_prepare_tx_descr(card
, descr
, skb
);
991 card
->tx_chain
.head
= card
->tx_chain
.head
->next
;
993 /* make sure the status from spider_net_prepare_tx_descr is in
994 * memory before we check out the previous descriptor */
997 if (spider_net_get_descr_status(descr
->prev
) !=
998 SPIDER_NET_DESCR_CARDOWNED
)
999 spider_net_kick_tx_dma(card
, descr
);
1001 return NETDEV_TX_OK
;
1004 card
->netdev_stats
.tx_dropped
++;
1005 return NETDEV_TX_LOCKED
;
1009 * spider_net_do_ioctl - called for device ioctls
1010 * @netdev: interface device structure
1011 * @ifr: request parameter structure for ioctl
1012 * @cmd: command code for ioctl
1014 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
1015 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
1018 spider_net_do_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
1027 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
1028 * @descr: descriptor to process
1029 * @card: card structure
1031 * returns 1 on success, 0 if no packet was passed to the stack
1033 * iommu-unmaps the skb, fills out skb structure and passes the data to the
1034 * stack. The descriptor state is not changed.
1037 spider_net_pass_skb_up(struct spider_net_descr
*descr
,
1038 struct spider_net_card
*card
)
1040 struct sk_buff
*skb
;
1041 struct net_device
*netdev
;
1042 u32 data_status
, data_error
;
1044 data_status
= descr
->data_status
;
1045 data_error
= descr
->data_error
;
1047 netdev
= card
->netdev
;
1049 /* check for errors in the data_error flag */
1050 if ((data_error
& SPIDER_NET_DATA_ERROR_MASK
) &&
1051 netif_msg_rx_err(card
))
1052 pr_err("error in received descriptor found, "
1053 "data_status=x%08x, data_error=x%08x\n",
1054 data_status
, data_error
);
1056 /* prepare skb, unmap descriptor */
1058 pci_unmap_single(card
->pdev
, descr
->buf_addr
, SPIDER_NET_MAX_MTU
,
1059 PCI_DMA_BIDIRECTIONAL
);
1061 /* the cases we'll throw away the packet immediately */
1062 if (data_error
& SPIDER_NET_DESTROY_RX_FLAGS
)
1066 skb_put(skb
, descr
->valid_size
);
1068 /* the card seems to add 2 bytes of junk in front
1069 * of the ethernet frame */
1070 #define SPIDER_MISALIGN 2
1071 skb_pull(skb
, SPIDER_MISALIGN
);
1072 skb
->protocol
= eth_type_trans(skb
, netdev
);
1074 /* checksum offload */
1075 if (card
->options
.rx_csum
) {
1076 if ( (data_status
& SPIDER_NET_DATA_STATUS_CHK_MASK
) &&
1077 (!(data_error
& SPIDER_NET_DATA_ERROR_CHK_MASK
)) )
1078 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1080 skb
->ip_summed
= CHECKSUM_NONE
;
1082 skb
->ip_summed
= CHECKSUM_NONE
;
1085 if (data_status
& SPIDER_NET_VLAN_PACKET
) {
1086 /* further enhancements: HW-accel VLAN
1087 * vlan_hwaccel_receive_skb
1091 /* pass skb up to stack */
1092 netif_receive_skb(skb
);
1094 /* update netdevice statistics */
1095 card
->netdev_stats
.rx_packets
++;
1096 card
->netdev_stats
.rx_bytes
+= skb
->len
;
1102 * spider_net_decode_descr - processes an rx descriptor
1103 * @card: card structure
1105 * returns 1 if a packet has been sent to the stack, otherwise 0
1107 * processes an rx descriptor by iommu-unmapping the data buffer and passing
1108 * the packet up to the stack
1111 spider_net_decode_one_descr(struct spider_net_card
*card
)
1113 enum spider_net_descr_status status
;
1114 struct spider_net_descr
*descr
;
1115 struct spider_net_descr_chain
*chain
;
1118 chain
= &card
->rx_chain
;
1119 descr
= chain
->tail
;
1121 status
= spider_net_get_descr_status(descr
);
1123 if (status
== SPIDER_NET_DESCR_CARDOWNED
) {
1124 /* nothing in the descriptor yet */
1128 if (status
== SPIDER_NET_DESCR_NOT_IN_USE
) {
1129 /* not initialized yet, I bet chain->tail == chain->head
1130 * and the ring is empty */
1131 spider_net_refill_rx_chain(card
);
1135 /* descriptor definitively used -- move on head */
1136 chain
->tail
= descr
->next
;
1139 if ( (status
== SPIDER_NET_DESCR_RESPONSE_ERROR
) ||
1140 (status
== SPIDER_NET_DESCR_PROTECTION_ERROR
) ||
1141 (status
== SPIDER_NET_DESCR_FORCE_END
) ) {
1142 if (netif_msg_rx_err(card
))
1143 pr_err("%s: dropping RX descriptor with state %d\n",
1144 card
->netdev
->name
, status
);
1145 card
->netdev_stats
.rx_dropped
++;
1149 if ( (status
!= SPIDER_NET_DESCR_COMPLETE
) &&
1150 (status
!= SPIDER_NET_DESCR_FRAME_END
) ) {
1151 if (netif_msg_rx_err(card
))
1152 pr_err("%s: RX descriptor with state %d\n",
1153 card
->netdev
->name
, status
);
1157 /* ok, we've got a packet in descr */
1158 result
= spider_net_pass_skb_up(descr
, card
);
1160 spider_net_set_descr_status(descr
, SPIDER_NET_DESCR_NOT_IN_USE
);
1161 /* change the descriptor state: */
1162 spider_net_refill_rx_chain(card
);
1168 * spider_net_poll - NAPI poll function called by the stack to return packets
1169 * @netdev: interface device structure
1170 * @budget: number of packets we can pass to the stack at most
1172 * returns 0 if no more packets available to the driver/stack. Returns 1,
1173 * if the quota is exceeded, but the driver has still packets.
1175 * spider_net_poll returns all packets from the rx descriptors to the stack
1176 * (using netif_receive_skb). If all/enough packets are up, the driver
1177 * reenables interrupts and returns 0. If not, 1 is returned.
1180 spider_net_poll(struct net_device
*netdev
, int *budget
)
1182 struct spider_net_card
*card
= netdev_priv(netdev
);
1183 int packets_to_do
, packets_done
= 0;
1184 int no_more_packets
= 0;
1186 packets_to_do
= min(*budget
, netdev
->quota
);
1188 while (packets_to_do
) {
1189 if (spider_net_decode_one_descr(card
)) {
1193 /* no more packets for the stack */
1194 no_more_packets
= 1;
1199 netdev
->quota
-= packets_done
;
1200 *budget
-= packets_done
;
1202 /* if all packets are in the stack, enable interrupts and return 0 */
1203 /* if not, return 1 */
1204 if (no_more_packets
) {
1205 netif_rx_complete(netdev
);
1206 spider_net_rx_irq_on(card
);
1214 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1215 * @netdev: interface device structure
1216 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1219 spider_net_vlan_rx_reg(struct net_device
*netdev
, struct vlan_group
*grp
)
1221 /* further enhancement... yet to do */
1226 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1227 * @netdev: interface device structure
1228 * @vid: VLAN id to add
1231 spider_net_vlan_rx_add(struct net_device
*netdev
, uint16_t vid
)
1233 /* further enhancement... yet to do */
1234 /* add vid to card's VLAN filter table */
1239 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1240 * @netdev: interface device structure
1241 * @vid: VLAN id to remove
1244 spider_net_vlan_rx_kill(struct net_device
*netdev
, uint16_t vid
)
1246 /* further enhancement... yet to do */
1247 /* remove vid from card's VLAN filter table */
1251 * spider_net_get_stats - get interface statistics
1252 * @netdev: interface device structure
1254 * returns the interface statistics residing in the spider_net_card struct
1256 static struct net_device_stats
*
1257 spider_net_get_stats(struct net_device
*netdev
)
1259 struct spider_net_card
*card
= netdev_priv(netdev
);
1260 struct net_device_stats
*stats
= &card
->netdev_stats
;
1265 * spider_net_change_mtu - changes the MTU of an interface
1266 * @netdev: interface device structure
1267 * @new_mtu: new MTU value
1269 * returns 0 on success, <0 on failure
1272 spider_net_change_mtu(struct net_device
*netdev
, int new_mtu
)
1274 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1275 * and mtu is outbound only anyway */
1276 if ( (new_mtu
< SPIDER_NET_MIN_MTU
) ||
1277 (new_mtu
> SPIDER_NET_MAX_MTU
) )
1279 netdev
->mtu
= new_mtu
;
1284 * spider_net_set_mac - sets the MAC of an interface
1285 * @netdev: interface device structure
1286 * @ptr: pointer to new MAC address
1288 * Returns 0 on success, <0 on failure. Currently, we don't support this
1289 * and will always return EOPNOTSUPP.
1292 spider_net_set_mac(struct net_device
*netdev
, void *p
)
1294 struct spider_net_card
*card
= netdev_priv(netdev
);
1295 u32 macl
, macu
, regvalue
;
1296 struct sockaddr
*addr
= p
;
1298 if (!is_valid_ether_addr(addr
->sa_data
))
1299 return -EADDRNOTAVAIL
;
1301 /* switch off GMACTPE and GMACRPE */
1302 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1303 regvalue
&= ~((1 << 5) | (1 << 6));
1304 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1307 macu
= (addr
->sa_data
[0]<<24) + (addr
->sa_data
[1]<<16) +
1308 (addr
->sa_data
[2]<<8) + (addr
->sa_data
[3]);
1309 macl
= (addr
->sa_data
[4]<<8) + (addr
->sa_data
[5]);
1310 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACU
, macu
);
1311 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACL
, macl
);
1313 /* switch GMACTPE and GMACRPE back on */
1314 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1315 regvalue
|= ((1 << 5) | (1 << 6));
1316 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1318 spider_net_set_promisc(card
);
1320 /* look up, whether we have been successful */
1321 if (spider_net_get_mac_address(netdev
))
1322 return -EADDRNOTAVAIL
;
1323 if (memcmp(netdev
->dev_addr
,addr
->sa_data
,netdev
->addr_len
))
1324 return -EADDRNOTAVAIL
;
1330 * spider_net_enable_txdmac - enables a TX DMA controller
1331 * @card: card structure
1333 * spider_net_enable_txdmac enables the TX DMA controller by setting the
1334 * descriptor chain tail address
1337 spider_net_enable_txdmac(struct spider_net_card
*card
)
1339 /* assume chain is aligned correctly */
1340 spider_net_write_reg(card
, SPIDER_NET_GDTDCHA
,
1341 card
->tx_chain
.tail
->bus_addr
);
1345 * spider_net_handle_error_irq - handles errors raised by an interrupt
1346 * @card: card structure
1347 * @status_reg: interrupt status register 0 (GHIINT0STS)
1349 * spider_net_handle_error_irq treats or ignores all error conditions
1350 * found when an interrupt is presented
1353 spider_net_handle_error_irq(struct spider_net_card
*card
, u32 status_reg
)
1355 u32 error_reg1
, error_reg2
;
1359 error_reg1
= spider_net_read_reg(card
, SPIDER_NET_GHIINT1STS
);
1360 error_reg2
= spider_net_read_reg(card
, SPIDER_NET_GHIINT2STS
);
1362 /* check GHIINT0STS ************************************/
1364 for (i
= 0; i
< 32; i
++)
1365 if (status_reg
& (1<<i
))
1368 /* let error_reg1 and error_reg2 evaluation decide, what to do
1369 case SPIDER_NET_PHYINT:
1370 case SPIDER_NET_GMAC2INT:
1371 case SPIDER_NET_GMAC1INT:
1372 case SPIDER_NET_GIPSINT:
1373 case SPIDER_NET_GFIFOINT:
1374 case SPIDER_NET_DMACINT:
1375 case SPIDER_NET_GSYSINT:
1378 case SPIDER_NET_GPWOPCMPINT
:
1379 /* PHY write operation completed */
1382 case SPIDER_NET_GPROPCMPINT
:
1383 /* PHY read operation completed */
1384 /* we don't use semaphores, as we poll for the completion
1385 * of the read operation in spider_net_read_phy. Should take
1389 case SPIDER_NET_GPWFFINT
:
1390 /* PHY command queue full */
1391 if (netif_msg_intr(card
))
1392 pr_err("PHY write queue full\n");
1396 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1397 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1398 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1400 case SPIDER_NET_GDTDEN0INT
:
1401 /* someone has set TX_DMA_EN to 0 */
1405 case SPIDER_NET_GDDDEN0INT
: /* fallthrough */
1406 case SPIDER_NET_GDCDEN0INT
: /* fallthrough */
1407 case SPIDER_NET_GDBDEN0INT
: /* fallthrough */
1408 case SPIDER_NET_GDADEN0INT
:
1409 /* someone has set RX_DMA_EN to 0 */
1414 case SPIDER_NET_GDDFDCINT
:
1415 case SPIDER_NET_GDCFDCINT
:
1416 case SPIDER_NET_GDBFDCINT
:
1417 case SPIDER_NET_GDAFDCINT
:
1418 /* case SPIDER_NET_GDNMINT: not used. print a message */
1419 /* case SPIDER_NET_GCNMINT: not used. print a message */
1420 /* case SPIDER_NET_GBNMINT: not used. print a message */
1421 /* case SPIDER_NET_GANMINT: not used. print a message */
1422 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1427 case SPIDER_NET_GDTFDCINT
:
1430 case SPIDER_NET_GTTEDINT
:
1433 case SPIDER_NET_GDTDCEINT
:
1434 /* chain end. If a descriptor should be sent, kick off
1436 if (card->tx_chain.tail == card->tx_chain.head)
1437 spider_net_kick_tx_dma(card);
1441 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1442 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1445 /* check GHIINT1STS ************************************/
1447 for (i
= 0; i
< 32; i
++)
1448 if (error_reg1
& (1<<i
))
1451 case SPIDER_NET_GTMFLLINT
:
1452 if (netif_msg_intr(card
))
1453 pr_err("Spider TX RAM full\n");
1456 case SPIDER_NET_GRMFLLINT
:
1457 if (netif_msg_intr(card
))
1458 pr_err("Spider RX RAM full, incoming packets "
1459 "might be discarded !\n");
1460 netif_rx_schedule(card
->netdev
);
1461 spider_net_enable_rxchtails(card
);
1462 spider_net_enable_rxdmac(card
);
1465 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1466 case SPIDER_NET_GDTINVDINT
:
1467 /* allrighty. tx from previous descr ok */
1470 /* case SPIDER_NET_GRFDFLLINT: print a message down there */
1471 /* case SPIDER_NET_GRFCFLLINT: print a message down there */
1472 /* case SPIDER_NET_GRFBFLLINT: print a message down there */
1473 /* case SPIDER_NET_GRFAFLLINT: print a message down there */
1476 case SPIDER_NET_GDDDCEINT
: /* fallthrough */
1477 case SPIDER_NET_GDCDCEINT
: /* fallthrough */
1478 case SPIDER_NET_GDBDCEINT
: /* fallthrough */
1479 case SPIDER_NET_GDADCEINT
:
1480 if (netif_msg_intr(card
))
1481 pr_err("got descriptor chain end interrupt, "
1482 "restarting DMAC %c.\n",
1483 'D'+i
-SPIDER_NET_GDDDCEINT
);
1484 spider_net_refill_rx_chain(card
);
1488 /* invalid descriptor */
1489 case SPIDER_NET_GDDINVDINT
: /* fallthrough */
1490 case SPIDER_NET_GDCINVDINT
: /* fallthrough */
1491 case SPIDER_NET_GDBINVDINT
: /* fallthrough */
1492 case SPIDER_NET_GDAINVDINT
:
1493 /* could happen when rx chain is full */
1494 spider_net_refill_rx_chain(card
);
1498 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1499 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1500 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1501 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1502 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1503 /* case SPIDER_NET_GDSERINT: problem, print a message */
1504 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1505 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1506 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1507 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1508 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1514 /* check GHIINT2STS ************************************/
1516 for (i
= 0; i
< 32; i
++)
1517 if (error_reg2
& (1<<i
))
1520 /* there is nothing we can (want to) do at this time. Log a
1521 * message, we can switch on and off the specific values later on
1522 case SPIDER_NET_GPROPERINT:
1523 case SPIDER_NET_GMCTCRSNGINT:
1524 case SPIDER_NET_GMCTLCOLINT:
1525 case SPIDER_NET_GMCTTMOTINT:
1526 case SPIDER_NET_GMCRCAERINT:
1527 case SPIDER_NET_GMCRCALERINT:
1528 case SPIDER_NET_GMCRALNERINT:
1529 case SPIDER_NET_GMCROVRINT:
1530 case SPIDER_NET_GMCRRNTINT:
1531 case SPIDER_NET_GMCRRXERINT:
1532 case SPIDER_NET_GTITCSERINT:
1533 case SPIDER_NET_GTIFMTERINT:
1534 case SPIDER_NET_GTIPKTRVKINT:
1535 case SPIDER_NET_GTISPINGINT:
1536 case SPIDER_NET_GTISADNGINT:
1537 case SPIDER_NET_GTISPDNGINT:
1538 case SPIDER_NET_GRIFMTERINT:
1539 case SPIDER_NET_GRIPKTRVKINT:
1540 case SPIDER_NET_GRISPINGINT:
1541 case SPIDER_NET_GRISADNGINT:
1542 case SPIDER_NET_GRISPDNGINT:
1549 if ((show_error
) && (netif_msg_intr(card
)))
1550 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1551 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1552 status_reg
, error_reg1
, error_reg2
);
1554 /* clear interrupt sources */
1555 spider_net_write_reg(card
, SPIDER_NET_GHIINT1STS
, error_reg1
);
1556 spider_net_write_reg(card
, SPIDER_NET_GHIINT2STS
, error_reg2
);
1560 * spider_net_interrupt - interrupt handler for spider_net
1561 * @irq: interupt number
1562 * @ptr: pointer to net_device
1563 * @regs: PU registers
1565 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1566 * interrupt found raised by card.
1568 * This is the interrupt handler, that turns off
1569 * interrupts for this device and makes the stack poll the driver
1572 spider_net_interrupt(int irq
, void *ptr
, struct pt_regs
*regs
)
1574 struct net_device
*netdev
= ptr
;
1575 struct spider_net_card
*card
= netdev_priv(netdev
);
1578 status_reg
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0STS
);
1583 if (status_reg
& SPIDER_NET_TXINT
)
1584 spider_net_release_tx_chain(card
, 0);
1586 if (status_reg
& SPIDER_NET_RXINT
) {
1587 spider_net_rx_irq_off(card
);
1588 netif_rx_schedule(netdev
);
1591 /* we do this after rx and tx processing, as we want the tx chain
1592 * processed to see, whether we should restart tx dma processing */
1593 spider_net_handle_error_irq(card
, status_reg
);
1595 /* clear interrupt sources */
1596 spider_net_write_reg(card
, SPIDER_NET_GHIINT0STS
, status_reg
);
1601 #ifdef CONFIG_NET_POLL_CONTROLLER
1603 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1604 * @netdev: interface device structure
1606 * see Documentation/networking/netconsole.txt
1609 spider_net_poll_controller(struct net_device
*netdev
)
1611 disable_irq(netdev
->irq
);
1612 spider_net_interrupt(netdev
->irq
, netdev
, NULL
);
1613 enable_irq(netdev
->irq
);
1615 #endif /* CONFIG_NET_POLL_CONTROLLER */
1618 * spider_net_init_card - initializes the card
1619 * @card: card structure
1621 * spider_net_init_card initializes the card so that other registers can
1625 spider_net_init_card(struct spider_net_card
*card
)
1627 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1628 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1630 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1631 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1635 * spider_net_enable_card - enables the card by setting all kinds of regs
1636 * @card: card structure
1638 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1641 spider_net_enable_card(struct spider_net_card
*card
)
1644 /* the following array consists of (register),(value) pairs
1645 * that are set in this function. A register of 0 ends the list */
1647 { SPIDER_NET_GRESUMINTNUM
, 0 },
1648 { SPIDER_NET_GREINTNUM
, 0 },
1650 /* set interrupt frame number registers */
1651 /* clear the single DMA engine registers first */
1652 { SPIDER_NET_GFAFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1653 { SPIDER_NET_GFBFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1654 { SPIDER_NET_GFCFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1655 { SPIDER_NET_GFDFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1656 /* then set, what we really need */
1657 { SPIDER_NET_GFFRMNUM
, SPIDER_NET_FRAMENUM_VALUE
},
1659 /* timer counter registers and stuff */
1660 { SPIDER_NET_GFREECNNUM
, 0 },
1661 { SPIDER_NET_GONETIMENUM
, 0 },
1662 { SPIDER_NET_GTOUTFRMNUM
, 0 },
1664 /* RX mode setting */
1665 { SPIDER_NET_GRXMDSET
, SPIDER_NET_RXMODE_VALUE
},
1666 /* TX mode setting */
1667 { SPIDER_NET_GTXMDSET
, SPIDER_NET_TXMODE_VALUE
},
1668 /* IPSEC mode setting */
1669 { SPIDER_NET_GIPSECINIT
, SPIDER_NET_IPSECINIT_VALUE
},
1671 { SPIDER_NET_GFTRESTRT
, SPIDER_NET_RESTART_VALUE
},
1673 { SPIDER_NET_GMRWOLCTRL
, 0 },
1674 { SPIDER_NET_GTESTMD
, 0 },
1676 { SPIDER_NET_GMACINTEN
, 0 },
1678 /* flow control stuff */
1679 { SPIDER_NET_GMACAPAUSE
, SPIDER_NET_MACAPAUSE_VALUE
},
1680 { SPIDER_NET_GMACTXPAUSE
, SPIDER_NET_TXPAUSE_VALUE
},
1682 { SPIDER_NET_GMACBSTLMT
, SPIDER_NET_BURSTLMT_VALUE
},
1687 while (regs
[i
][0]) {
1688 spider_net_write_reg(card
, regs
[i
][0], regs
[i
][1]);
1692 /* clear unicast filter table entries 1 to 14 */
1693 for (i
= 1; i
<= 14; i
++) {
1694 spider_net_write_reg(card
,
1695 SPIDER_NET_GMRUAFILnR
+ i
* 8,
1697 spider_net_write_reg(card
,
1698 SPIDER_NET_GMRUAFILnR
+ i
* 8 + 4,
1702 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
, 0x08080000);
1704 spider_net_write_reg(card
, SPIDER_NET_ECMODE
, SPIDER_NET_ECMODE_VALUE
);
1706 /* set chain tail adress for RX chains and
1708 spider_net_enable_rxchtails(card
);
1709 spider_net_enable_rxdmac(card
);
1711 spider_net_write_reg(card
, SPIDER_NET_GRXDMAEN
, SPIDER_NET_WOL_VALUE
);
1713 /* set chain tail adress for TX chain */
1714 spider_net_enable_txdmac(card
);
1716 spider_net_write_reg(card
, SPIDER_NET_GMACLENLMT
,
1717 SPIDER_NET_LENLMT_VALUE
);
1718 spider_net_write_reg(card
, SPIDER_NET_GMACMODE
,
1719 SPIDER_NET_MACMODE_VALUE
);
1720 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
,
1721 SPIDER_NET_OPMODE_VALUE
);
1723 /* set interrupt mask registers */
1724 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
,
1725 SPIDER_NET_INT0_MASK_VALUE
);
1726 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
,
1727 SPIDER_NET_INT1_MASK_VALUE
);
1728 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
,
1729 SPIDER_NET_INT2_MASK_VALUE
);
1733 * spider_net_open - called upon ifonfig up
1734 * @netdev: interface device structure
1736 * returns 0 on success, <0 on failure
1738 * spider_net_open allocates all the descriptors and memory needed for
1739 * operation, sets up multicast list and enables interrupts
1742 spider_net_open(struct net_device
*netdev
)
1744 struct spider_net_card
*card
= netdev_priv(netdev
);
1748 if (spider_net_init_chain(card
, &card
->tx_chain
,
1749 card
->descr
, tx_descriptors
))
1750 goto alloc_tx_failed
;
1751 if (spider_net_init_chain(card
, &card
->rx_chain
,
1752 card
->descr
+ tx_descriptors
, rx_descriptors
))
1753 goto alloc_rx_failed
;
1755 /* allocate rx skbs */
1756 if (spider_net_alloc_rx_skbs(card
))
1757 goto alloc_skbs_failed
;
1759 spider_net_set_multi(netdev
);
1761 /* further enhancement: setup hw vlan, if needed */
1764 if (request_irq(netdev
->irq
, spider_net_interrupt
,
1765 SA_SHIRQ
, netdev
->name
, netdev
))
1766 goto register_int_failed
;
1768 spider_net_enable_card(card
);
1770 netif_start_queue(netdev
);
1771 netif_carrier_on(netdev
);
1772 netif_poll_enable(netdev
);
1776 register_int_failed
:
1777 spider_net_free_rx_chain_contents(card
);
1779 spider_net_free_chain(card
, &card
->rx_chain
);
1781 spider_net_free_chain(card
, &card
->tx_chain
);
1787 * spider_net_setup_phy - setup PHY
1788 * @card: card structure
1790 * returns 0 on success, <0 on failure
1792 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1793 * the PHY to 1000 Mbps
1796 spider_net_setup_phy(struct spider_net_card
*card
)
1798 struct mii_phy
*phy
= &card
->phy
;
1800 spider_net_write_reg(card
, SPIDER_NET_GDTDMASEL
,
1801 SPIDER_NET_DMASEL_VALUE
);
1802 spider_net_write_reg(card
, SPIDER_NET_GPCCTRL
,
1803 SPIDER_NET_PHY_CTRL_VALUE
);
1805 phy
->dev
= card
->netdev
;
1806 phy
->mdio_read
= spider_net_read_phy
;
1807 phy
->mdio_write
= spider_net_write_phy
;
1809 mii_phy_probe(phy
, phy
->mii_id
);
1811 if (phy
->def
->ops
->setup_forced
)
1812 phy
->def
->ops
->setup_forced(phy
, SPEED_1000
, DUPLEX_FULL
);
1814 /* the following two writes could be moved to sungem_phy.c */
1815 /* enable fiber mode */
1816 spider_net_write_phy(card
->netdev
, 1, MII_NCONFIG
, 0x9020);
1817 /* LEDs active in both modes, autosense prio = fiber */
1818 spider_net_write_phy(card
->netdev
, 1, MII_NCONFIG
, 0x945f);
1820 /* switch off fibre autoneg */
1821 spider_net_write_phy(card
->netdev
, 1, MII_NCONFIG
, 0xfc01);
1822 spider_net_write_phy(card
->netdev
, 1, 0x0b, 0x0004);
1824 phy
->def
->ops
->read_link(phy
);
1825 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy
->def
->name
,
1826 phy
->speed
, phy
->duplex
==1 ? "Full" : "Half");
1832 * spider_net_download_firmware - loads firmware into the adapter
1833 * @card: card structure
1834 * @firmware: firmware pointer
1836 * spider_net_download_firmware loads the firmware opened by
1837 * spider_net_init_firmware into the adapter.
1840 spider_net_download_firmware(struct spider_net_card
*card
,
1841 const struct firmware
*firmware
)
1844 u32
*fw_ptr
= (u32
*)firmware
->data
;
1846 /* stop sequencers */
1847 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1848 SPIDER_NET_STOP_SEQ_VALUE
);
1850 for (sequencer
= 0; sequencer
< 6; sequencer
++) {
1851 spider_net_write_reg(card
,
1852 SPIDER_NET_GSnPRGADR
+ sequencer
* 8, 0);
1853 for (i
= 0; i
< SPIDER_NET_FIRMWARE_LEN
; i
++) {
1854 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1855 sequencer
* 8, *fw_ptr
);
1860 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1861 SPIDER_NET_RUN_SEQ_VALUE
);
1865 * spider_net_init_firmware - reads in firmware parts
1866 * @card: card structure
1868 * Returns 0 on success, <0 on failure
1870 * spider_net_init_firmware opens the sequencer firmware and does some basic
1871 * checks. This function opens and releases the firmware structure. A call
1872 * to download the firmware is performed before the release.
1876 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1877 * the program for each sequencer. Use the command
1878 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1879 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1880 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1882 * to generate spider_fw.bin, if you have sequencer programs with something
1883 * like the following contents for each sequencer:
1884 * <ONE LINE COMMENT>
1885 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1886 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1888 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1891 spider_net_init_firmware(struct spider_net_card
*card
)
1893 const struct firmware
*firmware
;
1896 if (request_firmware(&firmware
,
1897 SPIDER_NET_FIRMWARE_NAME
, &card
->pdev
->dev
) < 0) {
1898 if (netif_msg_probe(card
))
1899 pr_err("Couldn't read in sequencer data file %s.\n",
1900 SPIDER_NET_FIRMWARE_NAME
);
1905 if (firmware
->size
!= 6 * SPIDER_NET_FIRMWARE_LEN
* sizeof(u32
)) {
1906 if (netif_msg_probe(card
))
1907 pr_err("Invalid size of sequencer data file %s.\n",
1908 SPIDER_NET_FIRMWARE_NAME
);
1912 spider_net_download_firmware(card
, firmware
);
1916 release_firmware(firmware
);
1922 * spider_net_workaround_rxramfull - work around firmware bug
1923 * @card: card structure
1928 spider_net_workaround_rxramfull(struct spider_net_card
*card
)
1930 int i
, sequencer
= 0;
1933 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1934 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1936 /* empty sequencer data */
1937 for (sequencer
= 0; sequencer
< 6; sequencer
++) {
1938 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1939 sequencer
* 8, 0x0);
1940 for (i
= 0; i
< SPIDER_NET_FIRMWARE_LEN
; i
++) {
1941 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1942 sequencer
* 8, 0x0);
1946 /* set sequencer operation */
1947 spider_net_write_reg(card
, SPIDER_NET_GSINIT
, 0x000000fe);
1950 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1951 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1955 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1956 * function (to be called not under interrupt status)
1957 * @data: data, is interface device structure
1959 * called as task when tx hangs, resets interface (if interface is up)
1962 spider_net_tx_timeout_task(void *data
)
1964 struct net_device
*netdev
= data
;
1965 struct spider_net_card
*card
= netdev_priv(netdev
);
1967 if (!(netdev
->flags
& IFF_UP
))
1970 netif_device_detach(netdev
);
1971 spider_net_stop(netdev
);
1973 spider_net_workaround_rxramfull(card
);
1974 spider_net_init_card(card
);
1976 if (spider_net_setup_phy(card
))
1978 if (spider_net_init_firmware(card
))
1981 spider_net_open(netdev
);
1982 spider_net_kick_tx_dma(card
, card
->tx_chain
.head
);
1983 netif_device_attach(netdev
);
1986 atomic_dec(&card
->tx_timeout_task_counter
);
1990 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1991 * @netdev: interface device structure
1993 * called, if tx hangs. Schedules a task that resets the interface
1996 spider_net_tx_timeout(struct net_device
*netdev
)
1998 struct spider_net_card
*card
;
2000 card
= netdev_priv(netdev
);
2001 atomic_inc(&card
->tx_timeout_task_counter
);
2002 if (netdev
->flags
& IFF_UP
)
2003 schedule_work(&card
->tx_timeout_task
);
2005 atomic_dec(&card
->tx_timeout_task_counter
);
2009 * spider_net_setup_netdev_ops - initialization of net_device operations
2010 * @netdev: net_device structure
2012 * fills out function pointers in the net_device structure
2015 spider_net_setup_netdev_ops(struct net_device
*netdev
)
2017 netdev
->open
= &spider_net_open
;
2018 netdev
->stop
= &spider_net_stop
;
2019 netdev
->hard_start_xmit
= &spider_net_xmit
;
2020 netdev
->get_stats
= &spider_net_get_stats
;
2021 netdev
->set_multicast_list
= &spider_net_set_multi
;
2022 netdev
->set_mac_address
= &spider_net_set_mac
;
2023 netdev
->change_mtu
= &spider_net_change_mtu
;
2024 netdev
->do_ioctl
= &spider_net_do_ioctl
;
2026 netdev
->tx_timeout
= &spider_net_tx_timeout
;
2027 netdev
->watchdog_timeo
= SPIDER_NET_WATCHDOG_TIMEOUT
;
2029 netdev
->poll
= &spider_net_poll
;
2030 netdev
->weight
= SPIDER_NET_NAPI_WEIGHT
;
2032 netdev
->vlan_rx_register
= &spider_net_vlan_rx_reg
;
2033 netdev
->vlan_rx_add_vid
= &spider_net_vlan_rx_add
;
2034 netdev
->vlan_rx_kill_vid
= &spider_net_vlan_rx_kill
;
2035 #ifdef CONFIG_NET_POLL_CONTROLLER
2036 /* poll controller */
2037 netdev
->poll_controller
= &spider_net_poll_controller
;
2038 #endif /* CONFIG_NET_POLL_CONTROLLER */
2040 netdev
->ethtool_ops
= &spider_net_ethtool_ops
;
2044 * spider_net_setup_netdev - initialization of net_device
2045 * @card: card structure
2047 * Returns 0 on success or <0 on failure
2049 * spider_net_setup_netdev initializes the net_device structure
2052 spider_net_setup_netdev(struct spider_net_card
*card
)
2055 struct net_device
*netdev
= card
->netdev
;
2056 struct device_node
*dn
;
2057 struct sockaddr addr
;
2060 SET_MODULE_OWNER(netdev
);
2061 SET_NETDEV_DEV(netdev
, &card
->pdev
->dev
);
2063 pci_set_drvdata(card
->pdev
, netdev
);
2064 spin_lock_init(&card
->intmask_lock
);
2065 netdev
->irq
= card
->pdev
->irq
;
2067 card
->options
.rx_csum
= SPIDER_NET_RX_CSUM_DEFAULT
;
2069 spider_net_setup_netdev_ops(netdev
);
2071 netdev
->features
= 0;
2072 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2073 * NETIF_F_HW_VLAN_FILTER */
2075 netdev
->irq
= card
->pdev
->irq
;
2077 dn
= pci_device_to_OF_node(card
->pdev
);
2081 mac
= (u8
*)get_property(dn
, "local-mac-address", NULL
);
2084 memcpy(addr
.sa_data
, mac
, ETH_ALEN
);
2086 result
= spider_net_set_mac(netdev
, &addr
);
2087 if ((result
) && (netif_msg_probe(card
)))
2088 pr_err("Failed to set MAC address: %i\n", result
);
2090 result
= register_netdev(netdev
);
2092 if (netif_msg_probe(card
))
2093 pr_err("Couldn't register net_device: %i\n",
2098 if (netif_msg_probe(card
))
2099 pr_info("Initialized device %s.\n", netdev
->name
);
2105 * spider_net_alloc_card - allocates net_device and card structure
2107 * returns the card structure or NULL in case of errors
2109 * the card and net_device structures are linked to each other
2111 static struct spider_net_card
*
2112 spider_net_alloc_card(void)
2114 struct net_device
*netdev
;
2115 struct spider_net_card
*card
;
2118 alloc_size
= sizeof (*card
) +
2119 sizeof (struct spider_net_descr
) * rx_descriptors
+
2120 sizeof (struct spider_net_descr
) * tx_descriptors
;
2121 netdev
= alloc_etherdev(alloc_size
);
2125 card
= netdev_priv(netdev
);
2126 card
->netdev
= netdev
;
2127 card
->msg_enable
= SPIDER_NET_DEFAULT_MSG
;
2128 INIT_WORK(&card
->tx_timeout_task
, spider_net_tx_timeout_task
, netdev
);
2129 init_waitqueue_head(&card
->waitq
);
2130 atomic_set(&card
->tx_timeout_task_counter
, 0);
2136 * spider_net_undo_pci_setup - releases PCI ressources
2137 * @card: card structure
2139 * spider_net_undo_pci_setup releases the mapped regions
2142 spider_net_undo_pci_setup(struct spider_net_card
*card
)
2144 iounmap(card
->regs
);
2145 pci_release_regions(card
->pdev
);
2149 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2150 * @card: card structure
2153 * Returns the card structure or NULL if any errors occur
2155 * spider_net_setup_pci_dev initializes pdev and together with the
2156 * functions called in spider_net_open configures the device so that
2157 * data can be transferred over it
2158 * The net_device structure is attached to the card structure, if the
2159 * function returns without error.
2161 static struct spider_net_card
*
2162 spider_net_setup_pci_dev(struct pci_dev
*pdev
)
2164 struct spider_net_card
*card
;
2165 unsigned long mmio_start
, mmio_len
;
2167 if (pci_enable_device(pdev
)) {
2168 pr_err("Couldn't enable PCI device\n");
2172 if (!(pci_resource_flags(pdev
, 0) & IORESOURCE_MEM
)) {
2173 pr_err("Couldn't find proper PCI device base address.\n");
2174 goto out_disable_dev
;
2177 if (pci_request_regions(pdev
, spider_net_driver_name
)) {
2178 pr_err("Couldn't obtain PCI resources, aborting.\n");
2179 goto out_disable_dev
;
2182 pci_set_master(pdev
);
2184 card
= spider_net_alloc_card();
2186 pr_err("Couldn't allocate net_device structure, "
2188 goto out_release_regions
;
2192 /* fetch base address and length of first resource */
2193 mmio_start
= pci_resource_start(pdev
, 0);
2194 mmio_len
= pci_resource_len(pdev
, 0);
2196 card
->netdev
->mem_start
= mmio_start
;
2197 card
->netdev
->mem_end
= mmio_start
+ mmio_len
;
2198 card
->regs
= ioremap(mmio_start
, mmio_len
);
2201 pr_err("Couldn't obtain PCI resources, aborting.\n");
2202 goto out_release_regions
;
2207 out_release_regions
:
2208 pci_release_regions(pdev
);
2210 pci_disable_device(pdev
);
2211 pci_set_drvdata(pdev
, NULL
);
2216 * spider_net_probe - initialization of a device
2218 * @ent: entry in the device id list
2220 * Returns 0 on success, <0 on failure
2222 * spider_net_probe initializes pdev and registers a net_device
2223 * structure for it. After that, the device can be ifconfig'ed up
2225 static int __devinit
2226 spider_net_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2229 struct spider_net_card
*card
;
2231 card
= spider_net_setup_pci_dev(pdev
);
2235 spider_net_workaround_rxramfull(card
);
2236 spider_net_init_card(card
);
2238 err
= spider_net_setup_phy(card
);
2242 err
= spider_net_init_firmware(card
);
2246 err
= spider_net_setup_netdev(card
);
2253 spider_net_undo_pci_setup(card
);
2254 free_netdev(card
->netdev
);
2260 * spider_net_remove - removal of a device
2263 * Returns 0 on success, <0 on failure
2265 * spider_net_remove is called to remove the device and unregisters the
2268 static void __devexit
2269 spider_net_remove(struct pci_dev
*pdev
)
2271 struct net_device
*netdev
;
2272 struct spider_net_card
*card
;
2274 netdev
= pci_get_drvdata(pdev
);
2275 card
= netdev_priv(netdev
);
2277 wait_event(card
->waitq
,
2278 atomic_read(&card
->tx_timeout_task_counter
) == 0);
2280 unregister_netdev(netdev
);
2282 /* switch off card */
2283 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2284 SPIDER_NET_CKRCTRL_STOP_VALUE
);
2285 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2286 SPIDER_NET_CKRCTRL_RUN_VALUE
);
2288 spider_net_undo_pci_setup(card
);
2289 free_netdev(netdev
);
2292 static struct pci_driver spider_net_driver
= {
2293 .name
= spider_net_driver_name
,
2294 .id_table
= spider_net_pci_tbl
,
2295 .probe
= spider_net_probe
,
2296 .remove
= __devexit_p(spider_net_remove
)
2300 * spider_net_init - init function when the driver is loaded
2302 * spider_net_init registers the device driver
2304 static int __init
spider_net_init(void)
2306 if (rx_descriptors
< SPIDER_NET_RX_DESCRIPTORS_MIN
) {
2307 rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_MIN
;
2308 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors
);
2310 if (rx_descriptors
> SPIDER_NET_RX_DESCRIPTORS_MAX
) {
2311 rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_MAX
;
2312 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors
);
2314 if (tx_descriptors
< SPIDER_NET_TX_DESCRIPTORS_MIN
) {
2315 tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_MIN
;
2316 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors
);
2318 if (tx_descriptors
> SPIDER_NET_TX_DESCRIPTORS_MAX
) {
2319 tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_MAX
;
2320 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors
);
2323 return pci_register_driver(&spider_net_driver
);
2327 * spider_net_cleanup - exit function when driver is unloaded
2329 * spider_net_cleanup unregisters the device driver
2331 static void __exit
spider_net_cleanup(void)
2333 pci_unregister_driver(&spider_net_driver
);
2336 module_init(spider_net_init
);
2337 module_exit(spider_net_cleanup
);