2 * Network device driver for Cell Processor-Based Blade and Celleb platform
4 * (C) Copyright IBM Corp. 2005
5 * (C) Copyright 2006 TOSHIBA CORPORATION
7 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
8 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <linux/compiler.h>
26 #include <linux/crc32.h>
27 #include <linux/delay.h>
28 #include <linux/etherdevice.h>
29 #include <linux/ethtool.h>
30 #include <linux/firmware.h>
31 #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/vmalloc.h>
47 #include <linux/wait.h>
48 #include <linux/workqueue.h>
49 #include <asm/bitops.h>
50 #include <asm/pci-bridge.h>
51 #include <net/checksum.h>
53 #include "spider_net.h"
55 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
56 "<Jens.Osterkamp@de.ibm.com>");
57 MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
58 MODULE_LICENSE("GPL");
59 MODULE_VERSION(VERSION
);
61 static int rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_DEFAULT
;
62 static int tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_DEFAULT
;
64 module_param(rx_descriptors
, int, 0444);
65 module_param(tx_descriptors
, int, 0444);
67 MODULE_PARM_DESC(rx_descriptors
, "number of descriptors used " \
69 MODULE_PARM_DESC(tx_descriptors
, "number of descriptors used " \
72 char spider_net_driver_name
[] = "spidernet";
74 static struct pci_device_id spider_net_pci_tbl
[] = {
75 { PCI_VENDOR_ID_TOSHIBA_2
, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET
,
76 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0UL },
80 MODULE_DEVICE_TABLE(pci
, spider_net_pci_tbl
);
83 * spider_net_read_reg - reads an SMMIO register of a card
84 * @card: device structure
85 * @reg: register to read from
87 * returns the content of the specified SMMIO register.
90 spider_net_read_reg(struct spider_net_card
*card
, u32 reg
)
92 /* We use the powerpc specific variants instead of readl_be() because
93 * we know spidernet is not a real PCI device and we can thus avoid the
94 * performance hit caused by the PCI workarounds.
96 return in_be32(card
->regs
+ reg
);
100 * spider_net_write_reg - writes to an SMMIO register of a card
101 * @card: device structure
102 * @reg: register to write to
103 * @value: value to write into the specified SMMIO register
106 spider_net_write_reg(struct spider_net_card
*card
, u32 reg
, u32 value
)
108 /* We use the powerpc specific variants instead of writel_be() because
109 * we know spidernet is not a real PCI device and we can thus avoid the
110 * performance hit caused by the PCI workarounds.
112 out_be32(card
->regs
+ reg
, value
);
115 /** spider_net_write_phy - write to phy register
116 * @netdev: adapter to be written to
119 * @val: value to be written to phy register
121 * spider_net_write_phy_register writes to an arbitrary PHY
122 * register via the spider GPCWOPCMD register. We assume the queue does
123 * not run full (not more than 15 commands outstanding).
126 spider_net_write_phy(struct net_device
*netdev
, int mii_id
,
129 struct spider_net_card
*card
= netdev_priv(netdev
);
132 writevalue
= ((u32
)mii_id
<< 21) |
133 ((u32
)reg
<< 16) | ((u32
)val
);
135 spider_net_write_reg(card
, SPIDER_NET_GPCWOPCMD
, writevalue
);
138 /** spider_net_read_phy - read from phy register
139 * @netdev: network device to be read from
143 * Returns value read from PHY register
145 * spider_net_write_phy reads from an arbitrary PHY
146 * register via the spider GPCROPCMD register
149 spider_net_read_phy(struct net_device
*netdev
, int mii_id
, int reg
)
151 struct spider_net_card
*card
= netdev_priv(netdev
);
154 readvalue
= ((u32
)mii_id
<< 21) | ((u32
)reg
<< 16);
155 spider_net_write_reg(card
, SPIDER_NET_GPCROPCMD
, readvalue
);
157 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
158 * interrupt, as we poll for the completion of the read operation
159 * in spider_net_read_phy. Should take about 50 us */
161 readvalue
= spider_net_read_reg(card
, SPIDER_NET_GPCROPCMD
);
162 } while (readvalue
& SPIDER_NET_GPREXEC
);
164 readvalue
&= SPIDER_NET_GPRDAT_MASK
;
170 * spider_net_setup_aneg - initial auto-negotiation setup
171 * @card: device structure
174 spider_net_setup_aneg(struct spider_net_card
*card
)
176 struct mii_phy
*phy
= &card
->phy
;
180 bmsr
= spider_net_read_phy(card
->netdev
, phy
->mii_id
, MII_BMSR
);
181 estat
= spider_net_read_phy(card
->netdev
, phy
->mii_id
, MII_ESTATUS
);
183 if (bmsr
& BMSR_10HALF
)
184 advertise
|= ADVERTISED_10baseT_Half
;
185 if (bmsr
& BMSR_10FULL
)
186 advertise
|= ADVERTISED_10baseT_Full
;
187 if (bmsr
& BMSR_100HALF
)
188 advertise
|= ADVERTISED_100baseT_Half
;
189 if (bmsr
& BMSR_100FULL
)
190 advertise
|= ADVERTISED_100baseT_Full
;
192 if ((bmsr
& BMSR_ESTATEN
) && (estat
& ESTATUS_1000_TFULL
))
193 advertise
|= SUPPORTED_1000baseT_Full
;
194 if ((bmsr
& BMSR_ESTATEN
) && (estat
& ESTATUS_1000_THALF
))
195 advertise
|= SUPPORTED_1000baseT_Half
;
197 mii_phy_probe(phy
, phy
->mii_id
);
198 phy
->def
->ops
->setup_aneg(phy
, advertise
);
203 * spider_net_rx_irq_off - switch off rx irq on this spider card
204 * @card: device structure
206 * switches off rx irq by masking them out in the GHIINTnMSK register
209 spider_net_rx_irq_off(struct spider_net_card
*card
)
213 regvalue
= SPIDER_NET_INT0_MASK_VALUE
& (~SPIDER_NET_RXINT
);
214 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
218 * spider_net_rx_irq_on - switch on rx irq on this spider card
219 * @card: device structure
221 * switches on rx irq by enabling them in the GHIINTnMSK register
224 spider_net_rx_irq_on(struct spider_net_card
*card
)
228 regvalue
= SPIDER_NET_INT0_MASK_VALUE
| SPIDER_NET_RXINT
;
229 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, regvalue
);
233 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
234 * @card: card structure
236 * spider_net_set_promisc sets the unicast destination address filter and
237 * thus either allows for non-promisc mode or promisc mode
240 spider_net_set_promisc(struct spider_net_card
*card
)
243 struct net_device
*netdev
= card
->netdev
;
245 if (netdev
->flags
& IFF_PROMISC
) {
246 /* clear destination entry 0 */
247 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, 0);
248 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, 0);
249 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
250 SPIDER_NET_PROMISC_VALUE
);
252 macu
= netdev
->dev_addr
[0];
254 macu
|= netdev
->dev_addr
[1];
255 memcpy(&macl
, &netdev
->dev_addr
[2], sizeof(macl
));
257 macu
|= SPIDER_NET_UA_DESCR_VALUE
;
258 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
, macu
);
259 spider_net_write_reg(card
, SPIDER_NET_GMRUAFILnR
+ 0x04, macl
);
260 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
,
261 SPIDER_NET_NONPROMISC_VALUE
);
266 * spider_net_get_mac_address - read mac address from spider card
267 * @card: device structure
269 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
272 spider_net_get_mac_address(struct net_device
*netdev
)
274 struct spider_net_card
*card
= netdev_priv(netdev
);
277 macl
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACL
);
278 macu
= spider_net_read_reg(card
, SPIDER_NET_GMACUNIMACU
);
280 netdev
->dev_addr
[0] = (macu
>> 24) & 0xff;
281 netdev
->dev_addr
[1] = (macu
>> 16) & 0xff;
282 netdev
->dev_addr
[2] = (macu
>> 8) & 0xff;
283 netdev
->dev_addr
[3] = macu
& 0xff;
284 netdev
->dev_addr
[4] = (macl
>> 8) & 0xff;
285 netdev
->dev_addr
[5] = macl
& 0xff;
287 if (!is_valid_ether_addr(&netdev
->dev_addr
[0]))
294 * spider_net_get_descr_status -- returns the status of a descriptor
295 * @descr: descriptor to look at
297 * returns the status as in the dmac_cmd_status field of the descriptor
300 spider_net_get_descr_status(struct spider_net_hw_descr
*hwdescr
)
302 return hwdescr
->dmac_cmd_status
& SPIDER_NET_DESCR_IND_PROC_MASK
;
306 * spider_net_free_chain - free descriptor chain
307 * @card: card structure
308 * @chain: address of chain
312 spider_net_free_chain(struct spider_net_card
*card
,
313 struct spider_net_descr_chain
*chain
)
315 struct spider_net_descr
*descr
;
320 descr
->hwdescr
->next_descr_addr
= 0;
322 } while (descr
!= chain
->ring
);
324 dma_free_coherent(&card
->pdev
->dev
, chain
->num_desc
,
325 chain
->hwring
, chain
->dma_addr
);
329 * spider_net_init_chain - alloc and link descriptor chain
330 * @card: card structure
331 * @chain: address of chain
333 * We manage a circular list that mirrors the hardware structure,
334 * except that the hardware uses bus addresses.
336 * Returns 0 on success, <0 on failure
339 spider_net_init_chain(struct spider_net_card
*card
,
340 struct spider_net_descr_chain
*chain
)
343 struct spider_net_descr
*descr
;
344 struct spider_net_hw_descr
*hwdescr
;
348 alloc_size
= chain
->num_desc
* sizeof(struct spider_net_hw_descr
);
350 chain
->hwring
= dma_alloc_coherent(&card
->pdev
->dev
, alloc_size
,
351 &chain
->dma_addr
, GFP_KERNEL
);
356 memset(chain
->ring
, 0, chain
->num_desc
* sizeof(struct spider_net_descr
));
358 /* Set up the hardware pointers in each descriptor */
360 hwdescr
= chain
->hwring
;
361 buf
= chain
->dma_addr
;
362 for (i
=0; i
< chain
->num_desc
; i
++, descr
++, hwdescr
++) {
363 hwdescr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
364 hwdescr
->next_descr_addr
= 0;
366 descr
->hwdescr
= hwdescr
;
367 descr
->bus_addr
= buf
;
368 descr
->next
= descr
+ 1;
369 descr
->prev
= descr
- 1;
371 buf
+= sizeof(struct spider_net_hw_descr
);
373 /* do actual circular list */
374 (descr
-1)->next
= chain
->ring
;
375 chain
->ring
->prev
= descr
-1;
377 spin_lock_init(&chain
->lock
);
378 chain
->head
= chain
->ring
;
379 chain
->tail
= chain
->ring
;
384 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
385 * @card: card structure
387 * returns 0 on success, <0 on failure
390 spider_net_free_rx_chain_contents(struct spider_net_card
*card
)
392 struct spider_net_descr
*descr
;
394 descr
= card
->rx_chain
.head
;
397 pci_unmap_single(card
->pdev
, descr
->hwdescr
->buf_addr
,
398 SPIDER_NET_MAX_FRAME
,
399 PCI_DMA_BIDIRECTIONAL
);
400 dev_kfree_skb(descr
->skb
);
404 } while (descr
!= card
->rx_chain
.head
);
408 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
409 * @card: card structure
410 * @descr: descriptor to re-init
412 * Return 0 on succes, <0 on failure.
414 * Allocates a new rx skb, iommu-maps it and attaches it to the
415 * descriptor. Mark the descriptor as activated, ready-to-use.
418 spider_net_prepare_rx_descr(struct spider_net_card
*card
,
419 struct spider_net_descr
*descr
)
421 struct spider_net_hw_descr
*hwdescr
= descr
->hwdescr
;
426 /* we need to round up the buffer size to a multiple of 128 */
427 bufsize
= (SPIDER_NET_MAX_FRAME
+ SPIDER_NET_RXBUF_ALIGN
- 1) &
428 (~(SPIDER_NET_RXBUF_ALIGN
- 1));
430 /* and we need to have it 128 byte aligned, therefore we allocate a
432 /* allocate an skb */
433 descr
->skb
= netdev_alloc_skb(card
->netdev
,
434 bufsize
+ SPIDER_NET_RXBUF_ALIGN
- 1);
436 if (netif_msg_rx_err(card
) && net_ratelimit())
437 pr_err("Not enough memory to allocate rx buffer\n");
438 card
->spider_stats
.alloc_rx_skb_error
++;
441 hwdescr
->buf_size
= bufsize
;
442 hwdescr
->result_size
= 0;
443 hwdescr
->valid_size
= 0;
444 hwdescr
->data_status
= 0;
445 hwdescr
->data_error
= 0;
447 offset
= ((unsigned long)descr
->skb
->data
) &
448 (SPIDER_NET_RXBUF_ALIGN
- 1);
450 skb_reserve(descr
->skb
, SPIDER_NET_RXBUF_ALIGN
- offset
);
451 /* iommu-map the skb */
452 buf
= pci_map_single(card
->pdev
, descr
->skb
->data
,
453 SPIDER_NET_MAX_FRAME
, PCI_DMA_FROMDEVICE
);
454 if (pci_dma_mapping_error(buf
)) {
455 dev_kfree_skb_any(descr
->skb
);
457 if (netif_msg_rx_err(card
) && net_ratelimit())
458 pr_err("Could not iommu-map rx buffer\n");
459 card
->spider_stats
.rx_iommu_map_error
++;
460 hwdescr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
462 hwdescr
->buf_addr
= buf
;
463 hwdescr
->next_descr_addr
= 0;
465 hwdescr
->dmac_cmd_status
= SPIDER_NET_DESCR_CARDOWNED
|
466 SPIDER_NET_DMAC_NOINTR_COMPLETE
;
469 descr
->prev
->hwdescr
->next_descr_addr
= descr
->bus_addr
;
476 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
477 * @card: card structure
479 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
480 * chip by writing to the appropriate register. DMA is enabled in
481 * spider_net_enable_rxdmac.
484 spider_net_enable_rxchtails(struct spider_net_card
*card
)
486 /* assume chain is aligned correctly */
487 spider_net_write_reg(card
, SPIDER_NET_GDADCHA
,
488 card
->rx_chain
.tail
->bus_addr
);
492 * spider_net_enable_rxdmac - enables a receive DMA controller
493 * @card: card structure
495 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
496 * in the GDADMACCNTR register
499 spider_net_enable_rxdmac(struct spider_net_card
*card
)
502 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
503 SPIDER_NET_DMA_RX_VALUE
);
507 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
508 * @card: card structure
510 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
513 spider_net_refill_rx_chain(struct spider_net_card
*card
)
515 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
518 /* one context doing the refill (and a second context seeing that
519 * and omitting it) is ok. If called by NAPI, we'll be called again
520 * as spider_net_decode_one_descr is called several times. If some
521 * interrupt calls us, the NAPI is about to clean up anyway. */
522 if (!spin_trylock_irqsave(&chain
->lock
, flags
))
525 while (spider_net_get_descr_status(chain
->head
->hwdescr
) ==
526 SPIDER_NET_DESCR_NOT_IN_USE
) {
527 if (spider_net_prepare_rx_descr(card
, chain
->head
))
529 chain
->head
= chain
->head
->next
;
532 spin_unlock_irqrestore(&chain
->lock
, flags
);
536 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
537 * @card: card structure
539 * Returns 0 on success, <0 on failure.
542 spider_net_alloc_rx_skbs(struct spider_net_card
*card
)
545 struct spider_net_descr_chain
*chain
;
549 chain
= &card
->rx_chain
;
550 /* Put at least one buffer into the chain. if this fails,
551 * we've got a problem. If not, spider_net_refill_rx_chain
552 * will do the rest at the end of this function. */
553 if (spider_net_prepare_rx_descr(card
, chain
->head
))
556 chain
->head
= chain
->head
->next
;
558 /* This will allocate the rest of the rx buffers;
559 * if not, it's business as usual later on. */
560 spider_net_refill_rx_chain(card
);
561 spider_net_enable_rxdmac(card
);
565 spider_net_free_rx_chain_contents(card
);
570 * spider_net_get_multicast_hash - generates hash for multicast filter table
571 * @addr: multicast address
573 * returns the hash value.
575 * spider_net_get_multicast_hash calculates a hash value for a given multicast
576 * address, that is used to set the multicast filter tables
579 spider_net_get_multicast_hash(struct net_device
*netdev
, __u8
*addr
)
583 char addr_for_crc
[ETH_ALEN
] = { 0, };
586 for (i
= 0; i
< ETH_ALEN
* 8; i
++) {
587 bit
= (addr
[i
/ 8] >> (i
% 8)) & 1;
588 addr_for_crc
[ETH_ALEN
- 1 - i
/ 8] += bit
<< (7 - (i
% 8));
591 crc
= crc32_be(~0, addr_for_crc
, netdev
->addr_len
);
602 * spider_net_set_multi - sets multicast addresses and promisc flags
603 * @netdev: interface device structure
605 * spider_net_set_multi configures multicast addresses as needed for the
606 * netdev interface. It also sets up multicast, allmulti and promisc
607 * flags appropriately
610 spider_net_set_multi(struct net_device
*netdev
)
612 struct dev_mc_list
*mc
;
616 struct spider_net_card
*card
= netdev_priv(netdev
);
617 unsigned long bitmask
[SPIDER_NET_MULTICAST_HASHES
/ BITS_PER_LONG
] =
620 spider_net_set_promisc(card
);
622 if (netdev
->flags
& IFF_ALLMULTI
) {
623 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
; i
++) {
629 /* well, we know, what the broadcast hash value is: it's xfd
630 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
631 set_bit(0xfd, bitmask
);
633 for (mc
= netdev
->mc_list
; mc
; mc
= mc
->next
) {
634 hash
= spider_net_get_multicast_hash(netdev
, mc
->dmi_addr
);
635 set_bit(hash
, bitmask
);
639 for (i
= 0; i
< SPIDER_NET_MULTICAST_HASHES
/ 4; i
++) {
641 if (test_bit(i
* 4, bitmask
))
644 if (test_bit(i
* 4 + 1, bitmask
))
647 if (test_bit(i
* 4 + 2, bitmask
))
650 if (test_bit(i
* 4 + 3, bitmask
))
653 spider_net_write_reg(card
, SPIDER_NET_GMRMHFILnR
+ i
* 4, reg
);
658 * spider_net_disable_rxdmac - disables the receive DMA controller
659 * @card: card structure
661 * spider_net_disable_rxdmac terminates processing on the DMA controller by
662 * turing off DMA and issueing a force end
665 spider_net_disable_rxdmac(struct spider_net_card
*card
)
667 spider_net_write_reg(card
, SPIDER_NET_GDADMACCNTR
,
668 SPIDER_NET_DMA_RX_FEND_VALUE
);
672 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
673 * @card: card structure
674 * @descr: descriptor structure to fill out
675 * @skb: packet to use
677 * returns 0 on success, <0 on failure.
679 * fills out the descriptor structure with skb data and len. Copies data,
680 * if needed (32bit DMA!)
683 spider_net_prepare_tx_descr(struct spider_net_card
*card
,
686 struct spider_net_descr_chain
*chain
= &card
->tx_chain
;
687 struct spider_net_descr
*descr
;
688 struct spider_net_hw_descr
*hwdescr
;
692 buf
= pci_map_single(card
->pdev
, skb
->data
, skb
->len
, PCI_DMA_TODEVICE
);
693 if (pci_dma_mapping_error(buf
)) {
694 if (netif_msg_tx_err(card
) && net_ratelimit())
695 pr_err("could not iommu-map packet (%p, %i). "
696 "Dropping packet\n", skb
->data
, skb
->len
);
697 card
->spider_stats
.tx_iommu_map_error
++;
701 spin_lock_irqsave(&chain
->lock
, flags
);
702 descr
= card
->tx_chain
.head
;
703 if (descr
->next
== chain
->tail
->prev
) {
704 spin_unlock_irqrestore(&chain
->lock
, flags
);
705 pci_unmap_single(card
->pdev
, buf
, skb
->len
, PCI_DMA_TODEVICE
);
708 hwdescr
= descr
->hwdescr
;
709 chain
->head
= descr
->next
;
712 hwdescr
->buf_addr
= buf
;
713 hwdescr
->buf_size
= skb
->len
;
714 hwdescr
->next_descr_addr
= 0;
715 hwdescr
->data_status
= 0;
717 hwdescr
->dmac_cmd_status
=
718 SPIDER_NET_DESCR_CARDOWNED
| SPIDER_NET_DMAC_NOCS
;
719 spin_unlock_irqrestore(&chain
->lock
, flags
);
721 if (skb
->protocol
== htons(ETH_P_IP
) && skb
->ip_summed
== CHECKSUM_PARTIAL
)
722 switch (ip_hdr(skb
)->protocol
) {
724 hwdescr
->dmac_cmd_status
|= SPIDER_NET_DMAC_TCP
;
727 hwdescr
->dmac_cmd_status
|= SPIDER_NET_DMAC_UDP
;
731 /* Chain the bus address, so that the DMA engine finds this descr. */
733 descr
->prev
->hwdescr
->next_descr_addr
= descr
->bus_addr
;
735 card
->netdev
->trans_start
= jiffies
; /* set netdev watchdog timer */
740 spider_net_set_low_watermark(struct spider_net_card
*card
)
742 struct spider_net_descr
*descr
= card
->tx_chain
.tail
;
743 struct spider_net_hw_descr
*hwdescr
;
749 /* Measure the length of the queue. Measurement does not
750 * need to be precise -- does not need a lock. */
751 while (descr
!= card
->tx_chain
.head
) {
752 status
= descr
->hwdescr
->dmac_cmd_status
& SPIDER_NET_DESCR_NOT_IN_USE
;
753 if (status
== SPIDER_NET_DESCR_NOT_IN_USE
)
759 /* If TX queue is short, don't even bother with interrupts */
760 if (cnt
< card
->tx_chain
.num_desc
/4)
763 /* Set low-watermark 3/4th's of the way into the queue. */
764 descr
= card
->tx_chain
.tail
;
769 /* Set the new watermark, clear the old watermark */
770 spin_lock_irqsave(&card
->tx_chain
.lock
, flags
);
771 descr
->hwdescr
->dmac_cmd_status
|= SPIDER_NET_DESCR_TXDESFLG
;
772 if (card
->low_watermark
&& card
->low_watermark
!= descr
) {
773 hwdescr
= card
->low_watermark
->hwdescr
;
774 hwdescr
->dmac_cmd_status
=
775 hwdescr
->dmac_cmd_status
& ~SPIDER_NET_DESCR_TXDESFLG
;
777 card
->low_watermark
= descr
;
778 spin_unlock_irqrestore(&card
->tx_chain
.lock
, flags
);
783 * spider_net_release_tx_chain - processes sent tx descriptors
784 * @card: adapter structure
785 * @brutal: if set, don't care about whether descriptor seems to be in use
787 * returns 0 if the tx ring is empty, otherwise 1.
789 * spider_net_release_tx_chain releases the tx descriptors that spider has
790 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
791 * If some other context is calling this function, we return 1 so that we're
792 * scheduled again (if we were scheduled) and will not loose initiative.
795 spider_net_release_tx_chain(struct spider_net_card
*card
, int brutal
)
797 struct spider_net_descr_chain
*chain
= &card
->tx_chain
;
798 struct spider_net_descr
*descr
;
799 struct spider_net_hw_descr
*hwdescr
;
806 spin_lock_irqsave(&chain
->lock
, flags
);
807 if (chain
->tail
== chain
->head
) {
808 spin_unlock_irqrestore(&chain
->lock
, flags
);
812 hwdescr
= descr
->hwdescr
;
814 status
= spider_net_get_descr_status(hwdescr
);
816 case SPIDER_NET_DESCR_COMPLETE
:
817 card
->netdev_stats
.tx_packets
++;
818 card
->netdev_stats
.tx_bytes
+= descr
->skb
->len
;
821 case SPIDER_NET_DESCR_CARDOWNED
:
823 spin_unlock_irqrestore(&chain
->lock
, flags
);
827 /* fallthrough, if we release the descriptors
828 * brutally (then we don't care about
829 * SPIDER_NET_DESCR_CARDOWNED) */
831 case SPIDER_NET_DESCR_RESPONSE_ERROR
:
832 case SPIDER_NET_DESCR_PROTECTION_ERROR
:
833 case SPIDER_NET_DESCR_FORCE_END
:
834 if (netif_msg_tx_err(card
))
835 pr_err("%s: forcing end of tx descriptor "
836 "with status x%02x\n",
837 card
->netdev
->name
, status
);
838 card
->netdev_stats
.tx_errors
++;
842 card
->netdev_stats
.tx_dropped
++;
844 spin_unlock_irqrestore(&chain
->lock
, flags
);
849 chain
->tail
= descr
->next
;
850 hwdescr
->dmac_cmd_status
|= SPIDER_NET_DESCR_NOT_IN_USE
;
853 buf_addr
= hwdescr
->buf_addr
;
854 spin_unlock_irqrestore(&chain
->lock
, flags
);
858 pci_unmap_single(card
->pdev
, buf_addr
, skb
->len
,
867 * spider_net_kick_tx_dma - enables TX DMA processing
868 * @card: card structure
869 * @descr: descriptor address to enable TX processing at
871 * This routine will start the transmit DMA running if
872 * it is not already running. This routine ned only be
873 * called when queueing a new packet to an empty tx queue.
874 * Writes the current tx chain head as start address
875 * of the tx descriptor chain and enables the transmission
879 spider_net_kick_tx_dma(struct spider_net_card
*card
)
881 struct spider_net_descr
*descr
;
883 if (spider_net_read_reg(card
, SPIDER_NET_GDTDMACCNTR
) &
884 SPIDER_NET_TX_DMA_EN
)
887 descr
= card
->tx_chain
.tail
;
889 if (spider_net_get_descr_status(descr
->hwdescr
) ==
890 SPIDER_NET_DESCR_CARDOWNED
) {
891 spider_net_write_reg(card
, SPIDER_NET_GDTDCHA
,
893 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
894 SPIDER_NET_DMA_TX_VALUE
);
897 if (descr
== card
->tx_chain
.head
)
903 mod_timer(&card
->tx_timer
, jiffies
+ SPIDER_NET_TX_TIMER
);
907 * spider_net_xmit - transmits a frame over the device
908 * @skb: packet to send out
909 * @netdev: interface device structure
911 * returns 0 on success, !0 on failure
914 spider_net_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
917 struct spider_net_card
*card
= netdev_priv(netdev
);
919 spider_net_release_tx_chain(card
, 0);
921 if (spider_net_prepare_tx_descr(card
, skb
) != 0) {
922 card
->netdev_stats
.tx_dropped
++;
923 netif_stop_queue(netdev
);
924 return NETDEV_TX_BUSY
;
927 cnt
= spider_net_set_low_watermark(card
);
929 spider_net_kick_tx_dma(card
);
934 * spider_net_cleanup_tx_ring - cleans up the TX ring
935 * @card: card structure
937 * spider_net_cleanup_tx_ring is called by either the tx_timer
938 * or from the NAPI polling routine.
939 * This routine releases resources associted with transmitted
940 * packets, including updating the queue tail pointer.
943 spider_net_cleanup_tx_ring(struct spider_net_card
*card
)
945 if ((spider_net_release_tx_chain(card
, 0) != 0) &&
946 (card
->netdev
->flags
& IFF_UP
)) {
947 spider_net_kick_tx_dma(card
);
948 netif_wake_queue(card
->netdev
);
953 * spider_net_do_ioctl - called for device ioctls
954 * @netdev: interface device structure
955 * @ifr: request parameter structure for ioctl
956 * @cmd: command code for ioctl
958 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
959 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
962 spider_net_do_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
971 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
972 * @descr: descriptor to process
973 * @card: card structure
975 * Fills out skb structure and passes the data to the stack.
976 * The descriptor state is not changed.
979 spider_net_pass_skb_up(struct spider_net_descr
*descr
,
980 struct spider_net_card
*card
)
982 struct spider_net_hw_descr
*hwdescr
= descr
->hwdescr
;
984 struct net_device
*netdev
;
985 u32 data_status
, data_error
;
987 data_status
= hwdescr
->data_status
;
988 data_error
= hwdescr
->data_error
;
989 netdev
= card
->netdev
;
992 skb_put(skb
, hwdescr
->valid_size
);
994 /* the card seems to add 2 bytes of junk in front
995 * of the ethernet frame */
996 #define SPIDER_MISALIGN 2
997 skb_pull(skb
, SPIDER_MISALIGN
);
998 skb
->protocol
= eth_type_trans(skb
, netdev
);
1000 /* checksum offload */
1001 if (card
->options
.rx_csum
) {
1002 if ( ( (data_status
& SPIDER_NET_DATA_STATUS_CKSUM_MASK
) ==
1003 SPIDER_NET_DATA_STATUS_CKSUM_MASK
) &&
1004 !(data_error
& SPIDER_NET_DATA_ERR_CKSUM_MASK
))
1005 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1007 skb
->ip_summed
= CHECKSUM_NONE
;
1009 skb
->ip_summed
= CHECKSUM_NONE
;
1011 if (data_status
& SPIDER_NET_VLAN_PACKET
) {
1012 /* further enhancements: HW-accel VLAN
1013 * vlan_hwaccel_receive_skb
1017 /* update netdevice statistics */
1018 card
->netdev_stats
.rx_packets
++;
1019 card
->netdev_stats
.rx_bytes
+= skb
->len
;
1021 /* pass skb up to stack */
1022 netif_receive_skb(skb
);
1026 static void show_rx_chain(struct spider_net_card
*card
)
1028 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
1029 struct spider_net_descr
*start
= chain
->tail
;
1030 struct spider_net_descr
*descr
= start
;
1034 int cstat
= spider_net_get_descr_status(descr
);
1035 printk(KERN_INFO
"RX chain tail at descr=%ld\n",
1036 (start
- card
->descr
) - card
->tx_chain
.num_desc
);
1040 status
= spider_net_get_descr_status(descr
);
1041 if (cstat
!= status
) {
1042 printk(KERN_INFO
"Have %d descrs with stat=x%08x\n", cnt
, cstat
);
1047 descr
= descr
->next
;
1048 } while (descr
!= start
);
1049 printk(KERN_INFO
"Last %d descrs with stat=x%08x\n", cnt
, cstat
);
1054 * spider_net_decode_one_descr - processes an RX descriptor
1055 * @card: card structure
1057 * Returns 1 if a packet has been sent to the stack, otherwise 0.
1059 * Processes an RX descriptor by iommu-unmapping the data buffer
1060 * and passing the packet up to the stack. This function is called
1061 * in softirq context, e.g. either bottom half from interrupt or
1062 * NAPI polling context.
1065 spider_net_decode_one_descr(struct spider_net_card
*card
)
1067 struct spider_net_descr_chain
*chain
= &card
->rx_chain
;
1068 struct spider_net_descr
*descr
= chain
->tail
;
1069 struct spider_net_hw_descr
*hwdescr
= descr
->hwdescr
;
1072 status
= spider_net_get_descr_status(hwdescr
);
1074 /* Nothing in the descriptor, or ring must be empty */
1075 if ((status
== SPIDER_NET_DESCR_CARDOWNED
) ||
1076 (status
== SPIDER_NET_DESCR_NOT_IN_USE
))
1079 /* descriptor definitively used -- move on tail */
1080 chain
->tail
= descr
->next
;
1082 /* unmap descriptor */
1083 pci_unmap_single(card
->pdev
, hwdescr
->buf_addr
,
1084 SPIDER_NET_MAX_FRAME
, PCI_DMA_FROMDEVICE
);
1086 if ( (status
== SPIDER_NET_DESCR_RESPONSE_ERROR
) ||
1087 (status
== SPIDER_NET_DESCR_PROTECTION_ERROR
) ||
1088 (status
== SPIDER_NET_DESCR_FORCE_END
) ) {
1089 if (netif_msg_rx_err(card
))
1090 pr_err("%s: dropping RX descriptor with state %d\n",
1091 card
->netdev
->name
, status
);
1092 card
->netdev_stats
.rx_dropped
++;
1096 if ( (status
!= SPIDER_NET_DESCR_COMPLETE
) &&
1097 (status
!= SPIDER_NET_DESCR_FRAME_END
) ) {
1098 if (netif_msg_rx_err(card
))
1099 pr_err("%s: RX descriptor with unknown state %d\n",
1100 card
->netdev
->name
, status
);
1101 card
->spider_stats
.rx_desc_unk_state
++;
1105 /* The cases we'll throw away the packet immediately */
1106 if (hwdescr
->data_error
& SPIDER_NET_DESTROY_RX_FLAGS
) {
1107 if (netif_msg_rx_err(card
))
1108 pr_err("%s: error in received descriptor found, "
1109 "data_status=x%08x, data_error=x%08x\n",
1111 hwdescr
->data_status
, hwdescr
->data_error
);
1115 if (hwdescr
->dmac_cmd_status
& 0xfefe) {
1116 pr_err("%s: bad status, cmd_status=x%08x\n",
1118 hwdescr
->dmac_cmd_status
);
1119 pr_err("buf_addr=x%08x\n", hwdescr
->buf_addr
);
1120 pr_err("buf_size=x%08x\n", hwdescr
->buf_size
);
1121 pr_err("next_descr_addr=x%08x\n", hwdescr
->next_descr_addr
);
1122 pr_err("result_size=x%08x\n", hwdescr
->result_size
);
1123 pr_err("valid_size=x%08x\n", hwdescr
->valid_size
);
1124 pr_err("data_status=x%08x\n", hwdescr
->data_status
);
1125 pr_err("data_error=x%08x\n", hwdescr
->data_error
);
1126 pr_err("which=%ld\n", descr
- card
->rx_chain
.ring
);
1128 card
->spider_stats
.rx_desc_error
++;
1132 /* Ok, we've got a packet in descr */
1133 spider_net_pass_skb_up(descr
, card
);
1134 hwdescr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
1138 dev_kfree_skb_irq(descr
->skb
);
1140 hwdescr
->dmac_cmd_status
= SPIDER_NET_DESCR_NOT_IN_USE
;
1145 * spider_net_poll - NAPI poll function called by the stack to return packets
1146 * @netdev: interface device structure
1147 * @budget: number of packets we can pass to the stack at most
1149 * returns 0 if no more packets available to the driver/stack. Returns 1,
1150 * if the quota is exceeded, but the driver has still packets.
1152 * spider_net_poll returns all packets from the rx descriptors to the stack
1153 * (using netif_receive_skb). If all/enough packets are up, the driver
1154 * reenables interrupts and returns 0. If not, 1 is returned.
1157 spider_net_poll(struct net_device
*netdev
, int *budget
)
1159 struct spider_net_card
*card
= netdev_priv(netdev
);
1160 int packets_to_do
, packets_done
= 0;
1161 int no_more_packets
= 0;
1163 spider_net_cleanup_tx_ring(card
);
1164 packets_to_do
= min(*budget
, netdev
->quota
);
1166 while (packets_to_do
) {
1167 if (spider_net_decode_one_descr(card
)) {
1171 /* no more packets for the stack */
1172 no_more_packets
= 1;
1177 netdev
->quota
-= packets_done
;
1178 *budget
-= packets_done
;
1179 spider_net_refill_rx_chain(card
);
1180 spider_net_enable_rxdmac(card
);
1182 /* if all packets are in the stack, enable interrupts and return 0 */
1183 /* if not, return 1 */
1184 if (no_more_packets
) {
1185 netif_rx_complete(netdev
);
1186 spider_net_rx_irq_on(card
);
1194 * spider_net_get_stats - get interface statistics
1195 * @netdev: interface device structure
1197 * returns the interface statistics residing in the spider_net_card struct
1199 static struct net_device_stats
*
1200 spider_net_get_stats(struct net_device
*netdev
)
1202 struct spider_net_card
*card
= netdev_priv(netdev
);
1203 struct net_device_stats
*stats
= &card
->netdev_stats
;
1208 * spider_net_change_mtu - changes the MTU of an interface
1209 * @netdev: interface device structure
1210 * @new_mtu: new MTU value
1212 * returns 0 on success, <0 on failure
1215 spider_net_change_mtu(struct net_device
*netdev
, int new_mtu
)
1217 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1218 * and mtu is outbound only anyway */
1219 if ( (new_mtu
< SPIDER_NET_MIN_MTU
) ||
1220 (new_mtu
> SPIDER_NET_MAX_MTU
) )
1222 netdev
->mtu
= new_mtu
;
1227 * spider_net_set_mac - sets the MAC of an interface
1228 * @netdev: interface device structure
1229 * @ptr: pointer to new MAC address
1231 * Returns 0 on success, <0 on failure. Currently, we don't support this
1232 * and will always return EOPNOTSUPP.
1235 spider_net_set_mac(struct net_device
*netdev
, void *p
)
1237 struct spider_net_card
*card
= netdev_priv(netdev
);
1238 u32 macl
, macu
, regvalue
;
1239 struct sockaddr
*addr
= p
;
1241 if (!is_valid_ether_addr(addr
->sa_data
))
1242 return -EADDRNOTAVAIL
;
1244 /* switch off GMACTPE and GMACRPE */
1245 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1246 regvalue
&= ~((1 << 5) | (1 << 6));
1247 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1250 macu
= (addr
->sa_data
[0]<<24) + (addr
->sa_data
[1]<<16) +
1251 (addr
->sa_data
[2]<<8) + (addr
->sa_data
[3]);
1252 macl
= (addr
->sa_data
[4]<<8) + (addr
->sa_data
[5]);
1253 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACU
, macu
);
1254 spider_net_write_reg(card
, SPIDER_NET_GMACUNIMACL
, macl
);
1256 /* switch GMACTPE and GMACRPE back on */
1257 regvalue
= spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
);
1258 regvalue
|= ((1 << 5) | (1 << 6));
1259 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
, regvalue
);
1261 spider_net_set_promisc(card
);
1263 /* look up, whether we have been successful */
1264 if (spider_net_get_mac_address(netdev
))
1265 return -EADDRNOTAVAIL
;
1266 if (memcmp(netdev
->dev_addr
,addr
->sa_data
,netdev
->addr_len
))
1267 return -EADDRNOTAVAIL
;
1273 * spider_net_link_reset
1274 * @netdev: net device structure
1276 * This is called when the PHY_LINK signal is asserted. For the blade this is
1277 * not connected so we should never get here.
1281 spider_net_link_reset(struct net_device
*netdev
)
1284 struct spider_net_card
*card
= netdev_priv(netdev
);
1286 del_timer_sync(&card
->aneg_timer
);
1288 /* clear interrupt, block further interrupts */
1289 spider_net_write_reg(card
, SPIDER_NET_GMACST
,
1290 spider_net_read_reg(card
, SPIDER_NET_GMACST
));
1291 spider_net_write_reg(card
, SPIDER_NET_GMACINTEN
, 0);
1293 /* reset phy and setup aneg */
1294 spider_net_setup_aneg(card
);
1295 mod_timer(&card
->aneg_timer
, jiffies
+ SPIDER_NET_ANEG_TIMER
);
1300 * spider_net_handle_error_irq - handles errors raised by an interrupt
1301 * @card: card structure
1302 * @status_reg: interrupt status register 0 (GHIINT0STS)
1304 * spider_net_handle_error_irq treats or ignores all error conditions
1305 * found when an interrupt is presented
1308 spider_net_handle_error_irq(struct spider_net_card
*card
, u32 status_reg
)
1310 u32 error_reg1
, error_reg2
;
1314 error_reg1
= spider_net_read_reg(card
, SPIDER_NET_GHIINT1STS
);
1315 error_reg2
= spider_net_read_reg(card
, SPIDER_NET_GHIINT2STS
);
1317 /* check GHIINT0STS ************************************/
1319 for (i
= 0; i
< 32; i
++)
1320 if (status_reg
& (1<<i
))
1323 /* let error_reg1 and error_reg2 evaluation decide, what to do
1324 case SPIDER_NET_PHYINT:
1325 case SPIDER_NET_GMAC2INT:
1326 case SPIDER_NET_GMAC1INT:
1327 case SPIDER_NET_GFIFOINT:
1328 case SPIDER_NET_DMACINT:
1329 case SPIDER_NET_GSYSINT:
1332 case SPIDER_NET_GIPSINT
:
1336 case SPIDER_NET_GPWOPCMPINT
:
1337 /* PHY write operation completed */
1340 case SPIDER_NET_GPROPCMPINT
:
1341 /* PHY read operation completed */
1342 /* we don't use semaphores, as we poll for the completion
1343 * of the read operation in spider_net_read_phy. Should take
1347 case SPIDER_NET_GPWFFINT
:
1348 /* PHY command queue full */
1349 if (netif_msg_intr(card
))
1350 pr_err("PHY write queue full\n");
1354 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1355 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1356 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1358 case SPIDER_NET_GDTDEN0INT
:
1359 /* someone has set TX_DMA_EN to 0 */
1363 case SPIDER_NET_GDDDEN0INT
: /* fallthrough */
1364 case SPIDER_NET_GDCDEN0INT
: /* fallthrough */
1365 case SPIDER_NET_GDBDEN0INT
: /* fallthrough */
1366 case SPIDER_NET_GDADEN0INT
:
1367 /* someone has set RX_DMA_EN to 0 */
1372 case SPIDER_NET_GDDFDCINT
:
1373 case SPIDER_NET_GDCFDCINT
:
1374 case SPIDER_NET_GDBFDCINT
:
1375 case SPIDER_NET_GDAFDCINT
:
1376 /* case SPIDER_NET_GDNMINT: not used. print a message */
1377 /* case SPIDER_NET_GCNMINT: not used. print a message */
1378 /* case SPIDER_NET_GBNMINT: not used. print a message */
1379 /* case SPIDER_NET_GANMINT: not used. print a message */
1380 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1385 case SPIDER_NET_GDTFDCINT
:
1388 case SPIDER_NET_GTTEDINT
:
1391 case SPIDER_NET_GDTDCEINT
:
1392 /* chain end. If a descriptor should be sent, kick off
1394 if (card->tx_chain.tail != card->tx_chain.head)
1395 spider_net_kick_tx_dma(card);
1400 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1401 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1404 /* check GHIINT1STS ************************************/
1406 for (i
= 0; i
< 32; i
++)
1407 if (error_reg1
& (1<<i
))
1410 case SPIDER_NET_GTMFLLINT
:
1411 /* TX RAM full may happen on a usual case.
1412 * Logging is not needed. */
1415 case SPIDER_NET_GRFDFLLINT
: /* fallthrough */
1416 case SPIDER_NET_GRFCFLLINT
: /* fallthrough */
1417 case SPIDER_NET_GRFBFLLINT
: /* fallthrough */
1418 case SPIDER_NET_GRFAFLLINT
: /* fallthrough */
1419 case SPIDER_NET_GRMFLLINT
:
1420 if (netif_msg_intr(card
) && net_ratelimit())
1421 pr_err("Spider RX RAM full, incoming packets "
1422 "might be discarded!\n");
1423 spider_net_rx_irq_off(card
);
1424 netif_rx_schedule(card
->netdev
);
1428 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1429 case SPIDER_NET_GDTINVDINT
:
1430 /* allrighty. tx from previous descr ok */
1435 case SPIDER_NET_GDDDCEINT
: /* fallthrough */
1436 case SPIDER_NET_GDCDCEINT
: /* fallthrough */
1437 case SPIDER_NET_GDBDCEINT
: /* fallthrough */
1438 case SPIDER_NET_GDADCEINT
:
1439 if (netif_msg_intr(card
) && net_ratelimit())
1440 pr_err("got descriptor chain end interrupt, "
1441 "restarting DMAC %c.\n",
1442 'D'-(i
-SPIDER_NET_GDDDCEINT
)/3);
1443 spider_net_refill_rx_chain(card
);
1444 spider_net_enable_rxdmac(card
);
1448 /* invalid descriptor */
1449 case SPIDER_NET_GDDINVDINT
: /* fallthrough */
1450 case SPIDER_NET_GDCINVDINT
: /* fallthrough */
1451 case SPIDER_NET_GDBINVDINT
: /* fallthrough */
1452 case SPIDER_NET_GDAINVDINT
:
1453 /* could happen when rx chain is full */
1454 spider_net_refill_rx_chain(card
);
1455 spider_net_enable_rxdmac(card
);
1459 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1460 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1461 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1462 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1463 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1464 /* case SPIDER_NET_GDSERINT: problem, print a message */
1465 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1466 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1467 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1468 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1469 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1475 /* check GHIINT2STS ************************************/
1477 for (i
= 0; i
< 32; i
++)
1478 if (error_reg2
& (1<<i
))
1481 /* there is nothing we can (want to) do at this time. Log a
1482 * message, we can switch on and off the specific values later on
1483 case SPIDER_NET_GPROPERINT:
1484 case SPIDER_NET_GMCTCRSNGINT:
1485 case SPIDER_NET_GMCTLCOLINT:
1486 case SPIDER_NET_GMCTTMOTINT:
1487 case SPIDER_NET_GMCRCAERINT:
1488 case SPIDER_NET_GMCRCALERINT:
1489 case SPIDER_NET_GMCRALNERINT:
1490 case SPIDER_NET_GMCROVRINT:
1491 case SPIDER_NET_GMCRRNTINT:
1492 case SPIDER_NET_GMCRRXERINT:
1493 case SPIDER_NET_GTITCSERINT:
1494 case SPIDER_NET_GTIFMTERINT:
1495 case SPIDER_NET_GTIPKTRVKINT:
1496 case SPIDER_NET_GTISPINGINT:
1497 case SPIDER_NET_GTISADNGINT:
1498 case SPIDER_NET_GTISPDNGINT:
1499 case SPIDER_NET_GRIFMTERINT:
1500 case SPIDER_NET_GRIPKTRVKINT:
1501 case SPIDER_NET_GRISPINGINT:
1502 case SPIDER_NET_GRISADNGINT:
1503 case SPIDER_NET_GRISPDNGINT:
1510 if ((show_error
) && (netif_msg_intr(card
)) && net_ratelimit())
1511 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
1512 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1514 status_reg
, error_reg1
, error_reg2
);
1516 /* clear interrupt sources */
1517 spider_net_write_reg(card
, SPIDER_NET_GHIINT1STS
, error_reg1
);
1518 spider_net_write_reg(card
, SPIDER_NET_GHIINT2STS
, error_reg2
);
1522 * spider_net_interrupt - interrupt handler for spider_net
1523 * @irq: interupt number
1524 * @ptr: pointer to net_device
1525 * @regs: PU registers
1527 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1528 * interrupt found raised by card.
1530 * This is the interrupt handler, that turns off
1531 * interrupts for this device and makes the stack poll the driver
1534 spider_net_interrupt(int irq
, void *ptr
)
1536 struct net_device
*netdev
= ptr
;
1537 struct spider_net_card
*card
= netdev_priv(netdev
);
1540 status_reg
= spider_net_read_reg(card
, SPIDER_NET_GHIINT0STS
);
1545 if (status_reg
& SPIDER_NET_RXINT
) {
1546 spider_net_rx_irq_off(card
);
1547 netif_rx_schedule(netdev
);
1549 if (status_reg
& SPIDER_NET_TXINT
)
1550 netif_rx_schedule(netdev
);
1552 if (status_reg
& SPIDER_NET_LINKINT
)
1553 spider_net_link_reset(netdev
);
1555 if (status_reg
& SPIDER_NET_ERRINT
)
1556 spider_net_handle_error_irq(card
, status_reg
);
1558 /* clear interrupt sources */
1559 spider_net_write_reg(card
, SPIDER_NET_GHIINT0STS
, status_reg
);
1564 #ifdef CONFIG_NET_POLL_CONTROLLER
1566 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1567 * @netdev: interface device structure
1569 * see Documentation/networking/netconsole.txt
1572 spider_net_poll_controller(struct net_device
*netdev
)
1574 disable_irq(netdev
->irq
);
1575 spider_net_interrupt(netdev
->irq
, netdev
);
1576 enable_irq(netdev
->irq
);
1578 #endif /* CONFIG_NET_POLL_CONTROLLER */
1581 * spider_net_init_card - initializes the card
1582 * @card: card structure
1584 * spider_net_init_card initializes the card so that other registers can
1588 spider_net_init_card(struct spider_net_card
*card
)
1590 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1591 SPIDER_NET_CKRCTRL_STOP_VALUE
);
1593 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
1594 SPIDER_NET_CKRCTRL_RUN_VALUE
);
1596 /* trigger ETOMOD signal */
1597 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
,
1598 spider_net_read_reg(card
, SPIDER_NET_GMACOPEMD
) | 0x4);
1603 * spider_net_enable_card - enables the card by setting all kinds of regs
1604 * @card: card structure
1606 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1609 spider_net_enable_card(struct spider_net_card
*card
)
1612 /* the following array consists of (register),(value) pairs
1613 * that are set in this function. A register of 0 ends the list */
1615 { SPIDER_NET_GRESUMINTNUM
, 0 },
1616 { SPIDER_NET_GREINTNUM
, 0 },
1618 /* set interrupt frame number registers */
1619 /* clear the single DMA engine registers first */
1620 { SPIDER_NET_GFAFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1621 { SPIDER_NET_GFBFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1622 { SPIDER_NET_GFCFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1623 { SPIDER_NET_GFDFRMNUM
, SPIDER_NET_GFXFRAMES_VALUE
},
1624 /* then set, what we really need */
1625 { SPIDER_NET_GFFRMNUM
, SPIDER_NET_FRAMENUM_VALUE
},
1627 /* timer counter registers and stuff */
1628 { SPIDER_NET_GFREECNNUM
, 0 },
1629 { SPIDER_NET_GONETIMENUM
, 0 },
1630 { SPIDER_NET_GTOUTFRMNUM
, 0 },
1632 /* RX mode setting */
1633 { SPIDER_NET_GRXMDSET
, SPIDER_NET_RXMODE_VALUE
},
1634 /* TX mode setting */
1635 { SPIDER_NET_GTXMDSET
, SPIDER_NET_TXMODE_VALUE
},
1636 /* IPSEC mode setting */
1637 { SPIDER_NET_GIPSECINIT
, SPIDER_NET_IPSECINIT_VALUE
},
1639 { SPIDER_NET_GFTRESTRT
, SPIDER_NET_RESTART_VALUE
},
1641 { SPIDER_NET_GMRWOLCTRL
, 0 },
1642 { SPIDER_NET_GTESTMD
, 0x10000000 },
1643 { SPIDER_NET_GTTQMSK
, 0x00400040 },
1645 { SPIDER_NET_GMACINTEN
, 0 },
1647 /* flow control stuff */
1648 { SPIDER_NET_GMACAPAUSE
, SPIDER_NET_MACAPAUSE_VALUE
},
1649 { SPIDER_NET_GMACTXPAUSE
, SPIDER_NET_TXPAUSE_VALUE
},
1651 { SPIDER_NET_GMACBSTLMT
, SPIDER_NET_BURSTLMT_VALUE
},
1656 while (regs
[i
][0]) {
1657 spider_net_write_reg(card
, regs
[i
][0], regs
[i
][1]);
1661 /* clear unicast filter table entries 1 to 14 */
1662 for (i
= 1; i
<= 14; i
++) {
1663 spider_net_write_reg(card
,
1664 SPIDER_NET_GMRUAFILnR
+ i
* 8,
1666 spider_net_write_reg(card
,
1667 SPIDER_NET_GMRUAFILnR
+ i
* 8 + 4,
1671 spider_net_write_reg(card
, SPIDER_NET_GMRUA0FIL15R
, 0x08080000);
1673 spider_net_write_reg(card
, SPIDER_NET_ECMODE
, SPIDER_NET_ECMODE_VALUE
);
1675 /* set chain tail adress for RX chains and
1677 spider_net_enable_rxchtails(card
);
1678 spider_net_enable_rxdmac(card
);
1680 spider_net_write_reg(card
, SPIDER_NET_GRXDMAEN
, SPIDER_NET_WOL_VALUE
);
1682 spider_net_write_reg(card
, SPIDER_NET_GMACLENLMT
,
1683 SPIDER_NET_LENLMT_VALUE
);
1684 spider_net_write_reg(card
, SPIDER_NET_GMACOPEMD
,
1685 SPIDER_NET_OPMODE_VALUE
);
1687 /* set interrupt mask registers */
1688 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
,
1689 SPIDER_NET_INT0_MASK_VALUE
);
1690 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
,
1691 SPIDER_NET_INT1_MASK_VALUE
);
1692 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
,
1693 SPIDER_NET_INT2_MASK_VALUE
);
1695 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
1696 SPIDER_NET_GDTBSTA
);
1700 * spider_net_download_firmware - loads firmware into the adapter
1701 * @card: card structure
1702 * @firmware_ptr: pointer to firmware data
1704 * spider_net_download_firmware loads the firmware data into the
1705 * adapter. It assumes the length etc. to be allright.
1708 spider_net_download_firmware(struct spider_net_card
*card
,
1709 const void *firmware_ptr
)
1712 const u32
*fw_ptr
= firmware_ptr
;
1714 /* stop sequencers */
1715 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1716 SPIDER_NET_STOP_SEQ_VALUE
);
1718 for (sequencer
= 0; sequencer
< SPIDER_NET_FIRMWARE_SEQS
;
1720 spider_net_write_reg(card
,
1721 SPIDER_NET_GSnPRGADR
+ sequencer
* 8, 0);
1722 for (i
= 0; i
< SPIDER_NET_FIRMWARE_SEQWORDS
; i
++) {
1723 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
1724 sequencer
* 8, *fw_ptr
);
1729 if (spider_net_read_reg(card
, SPIDER_NET_GSINIT
))
1732 spider_net_write_reg(card
, SPIDER_NET_GSINIT
,
1733 SPIDER_NET_RUN_SEQ_VALUE
);
1739 * spider_net_init_firmware - reads in firmware parts
1740 * @card: card structure
1742 * Returns 0 on success, <0 on failure
1744 * spider_net_init_firmware opens the sequencer firmware and does some basic
1745 * checks. This function opens and releases the firmware structure. A call
1746 * to download the firmware is performed before the release.
1750 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1751 * the program for each sequencer. Use the command
1752 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1753 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1754 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1756 * to generate spider_fw.bin, if you have sequencer programs with something
1757 * like the following contents for each sequencer:
1758 * <ONE LINE COMMENT>
1759 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1760 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1762 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1765 spider_net_init_firmware(struct spider_net_card
*card
)
1767 struct firmware
*firmware
= NULL
;
1768 struct device_node
*dn
;
1769 const u8
*fw_prop
= NULL
;
1773 if (request_firmware((const struct firmware
**)&firmware
,
1774 SPIDER_NET_FIRMWARE_NAME
, &card
->pdev
->dev
) == 0) {
1775 if ( (firmware
->size
!= SPIDER_NET_FIRMWARE_LEN
) &&
1776 netif_msg_probe(card
) ) {
1777 pr_err("Incorrect size of spidernet firmware in " \
1778 "filesystem. Looking in host firmware...\n");
1781 err
= spider_net_download_firmware(card
, firmware
->data
);
1783 release_firmware(firmware
);
1791 dn
= pci_device_to_OF_node(card
->pdev
);
1795 fw_prop
= of_get_property(dn
, "firmware", &fw_size
);
1799 if ( (fw_size
!= SPIDER_NET_FIRMWARE_LEN
) &&
1800 netif_msg_probe(card
) ) {
1801 pr_err("Incorrect size of spidernet firmware in " \
1806 err
= spider_net_download_firmware(card
, fw_prop
);
1811 if (netif_msg_probe(card
))
1812 pr_err("Couldn't find spidernet firmware in filesystem " \
1813 "or host firmware\n");
1818 * spider_net_open - called upon ifonfig up
1819 * @netdev: interface device structure
1821 * returns 0 on success, <0 on failure
1823 * spider_net_open allocates all the descriptors and memory needed for
1824 * operation, sets up multicast list and enables interrupts
1827 spider_net_open(struct net_device
*netdev
)
1829 struct spider_net_card
*card
= netdev_priv(netdev
);
1832 result
= spider_net_init_firmware(card
);
1834 goto init_firmware_failed
;
1836 /* start probing with copper */
1837 spider_net_setup_aneg(card
);
1838 if (card
->phy
.def
->phy_id
)
1839 mod_timer(&card
->aneg_timer
, jiffies
+ SPIDER_NET_ANEG_TIMER
);
1841 result
= spider_net_init_chain(card
, &card
->tx_chain
);
1843 goto alloc_tx_failed
;
1844 card
->low_watermark
= NULL
;
1846 result
= spider_net_init_chain(card
, &card
->rx_chain
);
1848 goto alloc_rx_failed
;
1850 /* Allocate rx skbs */
1851 if (spider_net_alloc_rx_skbs(card
))
1852 goto alloc_skbs_failed
;
1854 spider_net_set_multi(netdev
);
1856 /* further enhancement: setup hw vlan, if needed */
1859 if (request_irq(netdev
->irq
, spider_net_interrupt
,
1860 IRQF_SHARED
, netdev
->name
, netdev
))
1861 goto register_int_failed
;
1863 spider_net_enable_card(card
);
1865 netif_start_queue(netdev
);
1866 netif_carrier_on(netdev
);
1867 netif_poll_enable(netdev
);
1871 register_int_failed
:
1872 spider_net_free_rx_chain_contents(card
);
1874 spider_net_free_chain(card
, &card
->rx_chain
);
1876 spider_net_free_chain(card
, &card
->tx_chain
);
1878 del_timer_sync(&card
->aneg_timer
);
1879 init_firmware_failed
:
1884 * spider_net_link_phy
1885 * @data: used for pointer to card structure
1888 static void spider_net_link_phy(unsigned long data
)
1890 struct spider_net_card
*card
= (struct spider_net_card
*)data
;
1891 struct mii_phy
*phy
= &card
->phy
;
1893 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
1894 if (card
->aneg_count
> SPIDER_NET_ANEG_TIMEOUT
) {
1896 pr_info("%s: link is down trying to bring it up\n", card
->netdev
->name
);
1898 switch (card
->medium
) {
1899 case BCM54XX_COPPER
:
1900 /* enable fiber with autonegotiation first */
1901 if (phy
->def
->ops
->enable_fiber
)
1902 phy
->def
->ops
->enable_fiber(phy
, 1);
1903 card
->medium
= BCM54XX_FIBER
;
1907 /* fiber didn't come up, try to disable fiber autoneg */
1908 if (phy
->def
->ops
->enable_fiber
)
1909 phy
->def
->ops
->enable_fiber(phy
, 0);
1910 card
->medium
= BCM54XX_UNKNOWN
;
1913 case BCM54XX_UNKNOWN
:
1914 /* copper, fiber with and without failed,
1915 * retry from beginning */
1916 spider_net_setup_aneg(card
);
1917 card
->medium
= BCM54XX_COPPER
;
1921 card
->aneg_count
= 0;
1922 mod_timer(&card
->aneg_timer
, jiffies
+ SPIDER_NET_ANEG_TIMER
);
1926 /* link still not up, try again later */
1927 if (!(phy
->def
->ops
->poll_link(phy
))) {
1929 mod_timer(&card
->aneg_timer
, jiffies
+ SPIDER_NET_ANEG_TIMER
);
1933 /* link came up, get abilities */
1934 phy
->def
->ops
->read_link(phy
);
1936 spider_net_write_reg(card
, SPIDER_NET_GMACST
,
1937 spider_net_read_reg(card
, SPIDER_NET_GMACST
));
1938 spider_net_write_reg(card
, SPIDER_NET_GMACINTEN
, 0x4);
1940 if (phy
->speed
== 1000)
1941 spider_net_write_reg(card
, SPIDER_NET_GMACMODE
, 0x00000001);
1943 spider_net_write_reg(card
, SPIDER_NET_GMACMODE
, 0);
1945 card
->aneg_count
= 0;
1947 pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
1948 phy
->def
->name
, phy
->speed
, phy
->duplex
==1 ? "Full" : "Half",
1949 phy
->autoneg
==1 ? "" : "no ");
1955 * spider_net_setup_phy - setup PHY
1956 * @card: card structure
1958 * returns 0 on success, <0 on failure
1960 * spider_net_setup_phy is used as part of spider_net_probe.
1963 spider_net_setup_phy(struct spider_net_card
*card
)
1965 struct mii_phy
*phy
= &card
->phy
;
1967 spider_net_write_reg(card
, SPIDER_NET_GDTDMASEL
,
1968 SPIDER_NET_DMASEL_VALUE
);
1969 spider_net_write_reg(card
, SPIDER_NET_GPCCTRL
,
1970 SPIDER_NET_PHY_CTRL_VALUE
);
1972 phy
->dev
= card
->netdev
;
1973 phy
->mdio_read
= spider_net_read_phy
;
1974 phy
->mdio_write
= spider_net_write_phy
;
1976 for (phy
->mii_id
= 1; phy
->mii_id
<= 31; phy
->mii_id
++) {
1978 id
= spider_net_read_phy(card
->netdev
, phy
->mii_id
, MII_BMSR
);
1979 if (id
!= 0x0000 && id
!= 0xffff) {
1980 if (!mii_phy_probe(phy
, phy
->mii_id
)) {
1981 pr_info("Found %s.\n", phy
->def
->name
);
1991 * spider_net_workaround_rxramfull - work around firmware bug
1992 * @card: card structure
1997 spider_net_workaround_rxramfull(struct spider_net_card
*card
)
1999 int i
, sequencer
= 0;
2002 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2003 SPIDER_NET_CKRCTRL_RUN_VALUE
);
2005 /* empty sequencer data */
2006 for (sequencer
= 0; sequencer
< SPIDER_NET_FIRMWARE_SEQS
;
2008 spider_net_write_reg(card
, SPIDER_NET_GSnPRGADR
+
2009 sequencer
* 8, 0x0);
2010 for (i
= 0; i
< SPIDER_NET_FIRMWARE_SEQWORDS
; i
++) {
2011 spider_net_write_reg(card
, SPIDER_NET_GSnPRGDAT
+
2012 sequencer
* 8, 0x0);
2016 /* set sequencer operation */
2017 spider_net_write_reg(card
, SPIDER_NET_GSINIT
, 0x000000fe);
2020 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2021 SPIDER_NET_CKRCTRL_STOP_VALUE
);
2025 * spider_net_stop - called upon ifconfig down
2026 * @netdev: interface device structure
2031 spider_net_stop(struct net_device
*netdev
)
2033 struct spider_net_card
*card
= netdev_priv(netdev
);
2035 netif_poll_disable(netdev
);
2036 netif_carrier_off(netdev
);
2037 netif_stop_queue(netdev
);
2038 del_timer_sync(&card
->tx_timer
);
2039 del_timer_sync(&card
->aneg_timer
);
2041 /* disable/mask all interrupts */
2042 spider_net_write_reg(card
, SPIDER_NET_GHIINT0MSK
, 0);
2043 spider_net_write_reg(card
, SPIDER_NET_GHIINT1MSK
, 0);
2044 spider_net_write_reg(card
, SPIDER_NET_GHIINT2MSK
, 0);
2045 spider_net_write_reg(card
, SPIDER_NET_GMACINTEN
, 0);
2047 free_irq(netdev
->irq
, netdev
);
2049 spider_net_write_reg(card
, SPIDER_NET_GDTDMACCNTR
,
2050 SPIDER_NET_DMA_TX_FEND_VALUE
);
2052 /* turn off DMA, force end */
2053 spider_net_disable_rxdmac(card
);
2055 /* release chains */
2056 spider_net_release_tx_chain(card
, 1);
2057 spider_net_free_rx_chain_contents(card
);
2059 spider_net_free_chain(card
, &card
->tx_chain
);
2060 spider_net_free_chain(card
, &card
->rx_chain
);
2066 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2067 * function (to be called not under interrupt status)
2068 * @data: data, is interface device structure
2070 * called as task when tx hangs, resets interface (if interface is up)
2073 spider_net_tx_timeout_task(struct work_struct
*work
)
2075 struct spider_net_card
*card
=
2076 container_of(work
, struct spider_net_card
, tx_timeout_task
);
2077 struct net_device
*netdev
= card
->netdev
;
2079 if (!(netdev
->flags
& IFF_UP
))
2082 netif_device_detach(netdev
);
2083 spider_net_stop(netdev
);
2085 spider_net_workaround_rxramfull(card
);
2086 spider_net_init_card(card
);
2088 if (spider_net_setup_phy(card
))
2091 spider_net_open(netdev
);
2092 spider_net_kick_tx_dma(card
);
2093 netif_device_attach(netdev
);
2096 atomic_dec(&card
->tx_timeout_task_counter
);
2100 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2101 * @netdev: interface device structure
2103 * called, if tx hangs. Schedules a task that resets the interface
2106 spider_net_tx_timeout(struct net_device
*netdev
)
2108 struct spider_net_card
*card
;
2110 card
= netdev_priv(netdev
);
2111 atomic_inc(&card
->tx_timeout_task_counter
);
2112 if (netdev
->flags
& IFF_UP
)
2113 schedule_work(&card
->tx_timeout_task
);
2115 atomic_dec(&card
->tx_timeout_task_counter
);
2116 card
->spider_stats
.tx_timeouts
++;
2120 * spider_net_setup_netdev_ops - initialization of net_device operations
2121 * @netdev: net_device structure
2123 * fills out function pointers in the net_device structure
2126 spider_net_setup_netdev_ops(struct net_device
*netdev
)
2128 netdev
->open
= &spider_net_open
;
2129 netdev
->stop
= &spider_net_stop
;
2130 netdev
->hard_start_xmit
= &spider_net_xmit
;
2131 netdev
->get_stats
= &spider_net_get_stats
;
2132 netdev
->set_multicast_list
= &spider_net_set_multi
;
2133 netdev
->set_mac_address
= &spider_net_set_mac
;
2134 netdev
->change_mtu
= &spider_net_change_mtu
;
2135 netdev
->do_ioctl
= &spider_net_do_ioctl
;
2137 netdev
->tx_timeout
= &spider_net_tx_timeout
;
2138 netdev
->watchdog_timeo
= SPIDER_NET_WATCHDOG_TIMEOUT
;
2140 netdev
->poll
= &spider_net_poll
;
2141 netdev
->weight
= SPIDER_NET_NAPI_WEIGHT
;
2143 #ifdef CONFIG_NET_POLL_CONTROLLER
2144 /* poll controller */
2145 netdev
->poll_controller
= &spider_net_poll_controller
;
2146 #endif /* CONFIG_NET_POLL_CONTROLLER */
2148 netdev
->ethtool_ops
= &spider_net_ethtool_ops
;
2152 * spider_net_setup_netdev - initialization of net_device
2153 * @card: card structure
2155 * Returns 0 on success or <0 on failure
2157 * spider_net_setup_netdev initializes the net_device structure
2160 spider_net_setup_netdev(struct spider_net_card
*card
)
2163 struct net_device
*netdev
= card
->netdev
;
2164 struct device_node
*dn
;
2165 struct sockaddr addr
;
2168 SET_MODULE_OWNER(netdev
);
2169 SET_NETDEV_DEV(netdev
, &card
->pdev
->dev
);
2171 pci_set_drvdata(card
->pdev
, netdev
);
2173 init_timer(&card
->tx_timer
);
2174 card
->tx_timer
.function
=
2175 (void (*)(unsigned long)) spider_net_cleanup_tx_ring
;
2176 card
->tx_timer
.data
= (unsigned long) card
;
2177 netdev
->irq
= card
->pdev
->irq
;
2179 card
->aneg_count
= 0;
2180 init_timer(&card
->aneg_timer
);
2181 card
->aneg_timer
.function
= spider_net_link_phy
;
2182 card
->aneg_timer
.data
= (unsigned long) card
;
2184 card
->options
.rx_csum
= SPIDER_NET_RX_CSUM_DEFAULT
;
2186 spider_net_setup_netdev_ops(netdev
);
2188 netdev
->features
= NETIF_F_HW_CSUM
| NETIF_F_LLTX
;
2189 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2190 * NETIF_F_HW_VLAN_FILTER */
2192 netdev
->irq
= card
->pdev
->irq
;
2194 dn
= pci_device_to_OF_node(card
->pdev
);
2198 mac
= of_get_property(dn
, "local-mac-address", NULL
);
2201 memcpy(addr
.sa_data
, mac
, ETH_ALEN
);
2203 result
= spider_net_set_mac(netdev
, &addr
);
2204 if ((result
) && (netif_msg_probe(card
)))
2205 pr_err("Failed to set MAC address: %i\n", result
);
2207 result
= register_netdev(netdev
);
2209 if (netif_msg_probe(card
))
2210 pr_err("Couldn't register net_device: %i\n",
2215 if (netif_msg_probe(card
))
2216 pr_info("Initialized device %s.\n", netdev
->name
);
2222 * spider_net_alloc_card - allocates net_device and card structure
2224 * returns the card structure or NULL in case of errors
2226 * the card and net_device structures are linked to each other
2228 static struct spider_net_card
*
2229 spider_net_alloc_card(void)
2231 struct net_device
*netdev
;
2232 struct spider_net_card
*card
;
2235 alloc_size
= sizeof(struct spider_net_card
) +
2236 (tx_descriptors
+ rx_descriptors
) * sizeof(struct spider_net_descr
);
2237 netdev
= alloc_etherdev(alloc_size
);
2241 card
= netdev_priv(netdev
);
2242 card
->netdev
= netdev
;
2243 card
->msg_enable
= SPIDER_NET_DEFAULT_MSG
;
2244 INIT_WORK(&card
->tx_timeout_task
, spider_net_tx_timeout_task
);
2245 init_waitqueue_head(&card
->waitq
);
2246 atomic_set(&card
->tx_timeout_task_counter
, 0);
2248 card
->rx_chain
.num_desc
= rx_descriptors
;
2249 card
->rx_chain
.ring
= card
->darray
;
2250 card
->tx_chain
.num_desc
= tx_descriptors
;
2251 card
->tx_chain
.ring
= card
->darray
+ rx_descriptors
;
2257 * spider_net_undo_pci_setup - releases PCI ressources
2258 * @card: card structure
2260 * spider_net_undo_pci_setup releases the mapped regions
2263 spider_net_undo_pci_setup(struct spider_net_card
*card
)
2265 iounmap(card
->regs
);
2266 pci_release_regions(card
->pdev
);
2270 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2271 * @card: card structure
2274 * Returns the card structure or NULL if any errors occur
2276 * spider_net_setup_pci_dev initializes pdev and together with the
2277 * functions called in spider_net_open configures the device so that
2278 * data can be transferred over it
2279 * The net_device structure is attached to the card structure, if the
2280 * function returns without error.
2282 static struct spider_net_card
*
2283 spider_net_setup_pci_dev(struct pci_dev
*pdev
)
2285 struct spider_net_card
*card
;
2286 unsigned long mmio_start
, mmio_len
;
2288 if (pci_enable_device(pdev
)) {
2289 pr_err("Couldn't enable PCI device\n");
2293 if (!(pci_resource_flags(pdev
, 0) & IORESOURCE_MEM
)) {
2294 pr_err("Couldn't find proper PCI device base address.\n");
2295 goto out_disable_dev
;
2298 if (pci_request_regions(pdev
, spider_net_driver_name
)) {
2299 pr_err("Couldn't obtain PCI resources, aborting.\n");
2300 goto out_disable_dev
;
2303 pci_set_master(pdev
);
2305 card
= spider_net_alloc_card();
2307 pr_err("Couldn't allocate net_device structure, "
2309 goto out_release_regions
;
2313 /* fetch base address and length of first resource */
2314 mmio_start
= pci_resource_start(pdev
, 0);
2315 mmio_len
= pci_resource_len(pdev
, 0);
2317 card
->netdev
->mem_start
= mmio_start
;
2318 card
->netdev
->mem_end
= mmio_start
+ mmio_len
;
2319 card
->regs
= ioremap(mmio_start
, mmio_len
);
2322 pr_err("Couldn't obtain PCI resources, aborting.\n");
2323 goto out_release_regions
;
2328 out_release_regions
:
2329 pci_release_regions(pdev
);
2331 pci_disable_device(pdev
);
2332 pci_set_drvdata(pdev
, NULL
);
2337 * spider_net_probe - initialization of a device
2339 * @ent: entry in the device id list
2341 * Returns 0 on success, <0 on failure
2343 * spider_net_probe initializes pdev and registers a net_device
2344 * structure for it. After that, the device can be ifconfig'ed up
2346 static int __devinit
2347 spider_net_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2350 struct spider_net_card
*card
;
2352 card
= spider_net_setup_pci_dev(pdev
);
2356 spider_net_workaround_rxramfull(card
);
2357 spider_net_init_card(card
);
2359 err
= spider_net_setup_phy(card
);
2363 err
= spider_net_setup_netdev(card
);
2370 spider_net_undo_pci_setup(card
);
2371 free_netdev(card
->netdev
);
2377 * spider_net_remove - removal of a device
2380 * Returns 0 on success, <0 on failure
2382 * spider_net_remove is called to remove the device and unregisters the
2385 static void __devexit
2386 spider_net_remove(struct pci_dev
*pdev
)
2388 struct net_device
*netdev
;
2389 struct spider_net_card
*card
;
2391 netdev
= pci_get_drvdata(pdev
);
2392 card
= netdev_priv(netdev
);
2394 wait_event(card
->waitq
,
2395 atomic_read(&card
->tx_timeout_task_counter
) == 0);
2397 unregister_netdev(netdev
);
2399 /* switch off card */
2400 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2401 SPIDER_NET_CKRCTRL_STOP_VALUE
);
2402 spider_net_write_reg(card
, SPIDER_NET_CKRCTRL
,
2403 SPIDER_NET_CKRCTRL_RUN_VALUE
);
2405 spider_net_undo_pci_setup(card
);
2406 free_netdev(netdev
);
2409 static struct pci_driver spider_net_driver
= {
2410 .name
= spider_net_driver_name
,
2411 .id_table
= spider_net_pci_tbl
,
2412 .probe
= spider_net_probe
,
2413 .remove
= __devexit_p(spider_net_remove
)
2417 * spider_net_init - init function when the driver is loaded
2419 * spider_net_init registers the device driver
2421 static int __init
spider_net_init(void)
2423 printk(KERN_INFO
"Spidernet version %s.\n", VERSION
);
2425 if (rx_descriptors
< SPIDER_NET_RX_DESCRIPTORS_MIN
) {
2426 rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_MIN
;
2427 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors
);
2429 if (rx_descriptors
> SPIDER_NET_RX_DESCRIPTORS_MAX
) {
2430 rx_descriptors
= SPIDER_NET_RX_DESCRIPTORS_MAX
;
2431 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors
);
2433 if (tx_descriptors
< SPIDER_NET_TX_DESCRIPTORS_MIN
) {
2434 tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_MIN
;
2435 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors
);
2437 if (tx_descriptors
> SPIDER_NET_TX_DESCRIPTORS_MAX
) {
2438 tx_descriptors
= SPIDER_NET_TX_DESCRIPTORS_MAX
;
2439 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors
);
2442 return pci_register_driver(&spider_net_driver
);
2446 * spider_net_cleanup - exit function when driver is unloaded
2448 * spider_net_cleanup unregisters the device driver
2450 static void __exit
spider_net_cleanup(void)
2452 pci_unregister_driver(&spider_net_driver
);
2455 module_init(spider_net_init
);
2456 module_exit(spider_net_cleanup
);