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authorJens Osterkamp <Jens.Osterkamp@de.ibm.com>2005-09-05 18:19:29 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-09-06 22:17:49 -0400
commitaaec0fab5f8809fe1509fdc204e769bb35ebe41a (patch)
tree8f2ae06374413dd9d3e56a12b0592be9bb58c6e5 /drivers/net/spider_net.c
parent25097d4bda4a554d8b4a9989c7d8bcb67ef53f48 (diff)
[PATCH] net: add driver for the NIC on Cell Blades
This patch adds a driver for a new 1000 Mbit ethernet NIC. It is integrated on the south bridge that is used for our Cell Blades. The code gets the MAC address from the Open Firmware device tree, so it won't compile on platforms other than ppc64. This is the first public release, so I don't expect the first version to get merged, but I'd aim for integration within the 2.6.13 time frame. Cc: Utz Bacher <utz.bacher@de.ibm.com> Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/spider_net.c')
-rw-r--r--drivers/net/spider_net.c2298
1 files changed, 2298 insertions, 0 deletions
diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
new file mode 100644
index 000000000000..692a0437fef7
--- /dev/null
+++ b/drivers/net/spider_net.c
@@ -0,0 +1,2298 @@
1/*
2 * Network device driver for Cell Processor-Based Blade
3 *
4 * (C) Copyright IBM Corp. 2005
5 *
6 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
7 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
8 *
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)
12 * any later version.
13 *
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.
18 *
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.
22 */
23
24#include <linux/config.h>
25
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>
35#include <linux/ip.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>
51
52#include "spider_net.h"
53
54MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
55 "<Jens.Osterkamp@de.ibm.com>");
56MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
57MODULE_LICENSE("GPL");
58
59static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
60static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
61
62module_param(rx_descriptors, int, 0644);
63module_param(tx_descriptors, int, 0644);
64
65MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
66 "in rx chains");
67MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
68 "in tx chain");
69
70char spider_net_driver_name[] = "spidernet";
71
72static 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 },
75 { 0, }
76};
77
78MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
79
80/**
81 * spider_net_read_reg - reads an SMMIO register of a card
82 * @card: device structure
83 * @reg: register to read from
84 *
85 * returns the content of the specified SMMIO register.
86 */
87static u32
88spider_net_read_reg(struct spider_net_card *card, u32 reg)
89{
90 u32 value;
91
92 value = readl(card->regs + reg);
93 value = le32_to_cpu(value);
94
95 return value;
96}
97
98/**
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
103 */
104static void
105spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
106{
107 value = cpu_to_le32(value);
108 writel(value, card->regs + reg);
109}
110
111/**
112 * spider_net_rx_irq_off - switch off rx irq on this spider card
113 * @card: device structure
114 *
115 * switches off rx irq by masking them out in the GHIINTnMSK register
116 */
117static void
118spider_net_rx_irq_off(struct spider_net_card *card)
119{
120 u32 regvalue;
121 unsigned long flags;
122
123 spin_lock_irqsave(&card->intmask_lock, flags);
124 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
125 regvalue &= ~SPIDER_NET_RXINT;
126 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
127 spin_unlock_irqrestore(&card->intmask_lock, flags);
128}
129
130/** spider_net_write_phy - write to phy register
131 * @netdev: adapter to be written to
132 * @mii_id: id of MII
133 * @reg: PHY register
134 * @val: value to be written to phy register
135 *
136 * spider_net_write_phy_register writes to an arbitrary PHY
137 * register via the spider GPCWOPCMD register. We assume the queue does
138 * not run full (not more than 15 commands outstanding).
139 **/
140static void
141spider_net_write_phy(struct net_device *netdev, int mii_id,
142 int reg, int val)
143{
144 struct spider_net_card *card = netdev_priv(netdev);
145 u32 writevalue;
146
147 writevalue = ((u32)mii_id << 21) |
148 ((u32)reg << 16) | ((u32)val);
149
150 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
151}
152
153/** spider_net_read_phy - read from phy register
154 * @netdev: network device to be read from
155 * @mii_id: id of MII
156 * @reg: PHY register
157 *
158 * Returns value read from PHY register
159 *
160 * spider_net_write_phy reads from an arbitrary PHY
161 * register via the spider GPCROPCMD register
162 **/
163static int
164spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
165{
166 struct spider_net_card *card = netdev_priv(netdev);
167 u32 readvalue;
168
169 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
170 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
171
172 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
173 * interrupt, as we poll for the completion of the read operation
174 * in spider_net_read_phy. Should take about 50 us */
175 do {
176 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
177 } while (readvalue & SPIDER_NET_GPREXEC);
178
179 readvalue &= SPIDER_NET_GPRDAT_MASK;
180
181 return readvalue;
182}
183
184/**
185 * spider_net_rx_irq_on - switch on rx irq on this spider card
186 * @card: device structure
187 *
188 * switches on rx irq by enabling them in the GHIINTnMSK register
189 */
190static void
191spider_net_rx_irq_on(struct spider_net_card *card)
192{
193 u32 regvalue;
194 unsigned long flags;
195
196 spin_lock_irqsave(&card->intmask_lock, flags);
197 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
198 regvalue |= SPIDER_NET_RXINT;
199 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
200 spin_unlock_irqrestore(&card->intmask_lock, flags);
201}
202
203/**
204 * spider_net_tx_irq_off - switch off tx irq on this spider card
205 * @card: device structure
206 *
207 * switches off tx irq by masking them out in the GHIINTnMSK register
208 */
209static void
210spider_net_tx_irq_off(struct spider_net_card *card)
211{
212 u32 regvalue;
213 unsigned long flags;
214
215 spin_lock_irqsave(&card->intmask_lock, flags);
216 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
217 regvalue &= ~SPIDER_NET_TXINT;
218 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
219 spin_unlock_irqrestore(&card->intmask_lock, flags);
220}
221
222/**
223 * spider_net_tx_irq_on - switch on tx irq on this spider card
224 * @card: device structure
225 *
226 * switches on tx irq by enabling them in the GHIINTnMSK register
227 */
228static void
229spider_net_tx_irq_on(struct spider_net_card *card)
230{
231 u32 regvalue;
232 unsigned long flags;
233
234 spin_lock_irqsave(&card->intmask_lock, flags);
235 regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
236 regvalue |= SPIDER_NET_TXINT;
237 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
238 spin_unlock_irqrestore(&card->intmask_lock, flags);
239}
240
241/**
242 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
243 * @card: card structure
244 *
245 * spider_net_set_promisc sets the unicast destination address filter and
246 * thus either allows for non-promisc mode or promisc mode
247 */
248static void
249spider_net_set_promisc(struct spider_net_card *card)
250{
251 u32 macu, macl;
252 struct net_device *netdev = card->netdev;
253
254 if (netdev->flags & IFF_PROMISC) {
255 /* clear destination entry 0 */
256 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
257 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
258 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
259 SPIDER_NET_PROMISC_VALUE);
260 } else {
261 macu = netdev->dev_addr[0];
262 macu <<= 8;
263 macu |= netdev->dev_addr[1];
264 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
265
266 macu |= SPIDER_NET_UA_DESCR_VALUE;
267 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
268 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
269 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
270 SPIDER_NET_NONPROMISC_VALUE);
271 }
272}
273
274/**
275 * spider_net_get_mac_address - read mac address from spider card
276 * @card: device structure
277 *
278 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
279 */
280static int
281spider_net_get_mac_address(struct net_device *netdev)
282{
283 struct spider_net_card *card = netdev_priv(netdev);
284 u32 macl, macu;
285
286 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
287 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
288
289 netdev->dev_addr[0] = (macu >> 24) & 0xff;
290 netdev->dev_addr[1] = (macu >> 16) & 0xff;
291 netdev->dev_addr[2] = (macu >> 8) & 0xff;
292 netdev->dev_addr[3] = macu & 0xff;
293 netdev->dev_addr[4] = (macl >> 8) & 0xff;
294 netdev->dev_addr[5] = macl & 0xff;
295
296 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
297 return -EINVAL;
298
299 return 0;
300}
301
302/**
303 * spider_net_get_descr_status -- returns the status of a descriptor
304 * @descr: descriptor to look at
305 *
306 * returns the status as in the dmac_cmd_status field of the descriptor
307 */
308static enum spider_net_descr_status
309spider_net_get_descr_status(struct spider_net_descr *descr)
310{
311 u32 cmd_status;
312 rmb();
313 cmd_status = descr->dmac_cmd_status;
314 rmb();
315 cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT;
316 /* no need to mask out any bits, as cmd_status is 32 bits wide only
317 * (and unsigned) */
318 return cmd_status;
319}
320
321/**
322 * spider_net_set_descr_status -- sets the status of a descriptor
323 * @descr: descriptor to change
324 * @status: status to set in the descriptor
325 *
326 * changes the status to the specified value. Doesn't change other bits
327 * in the status
328 */
329static void
330spider_net_set_descr_status(struct spider_net_descr *descr,
331 enum spider_net_descr_status status)
332{
333 u32 cmd_status;
334 /* read the status */
335 mb();
336 cmd_status = descr->dmac_cmd_status;
337 /* clean the upper 4 bits */
338 cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO;
339 /* add the status to it */
340 cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT;
341 /* and write it back */
342 descr->dmac_cmd_status = cmd_status;
343 wmb();
344}
345
346/**
347 * spider_net_free_chain - free descriptor chain
348 * @card: card structure
349 * @chain: address of chain
350 *
351 */
352static void
353spider_net_free_chain(struct spider_net_card *card,
354 struct spider_net_descr_chain *chain)
355{
356 struct spider_net_descr *descr;
357
358 for (descr = chain->tail; !descr->bus_addr; descr = descr->next) {
359 pci_unmap_single(card->pdev, descr->bus_addr,
360 SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
361 descr->bus_addr = 0;
362 }
363}
364
365/**
366 * spider_net_init_chain - links descriptor chain
367 * @card: card structure
368 * @chain: address of chain
369 * @start_descr: address of descriptor array
370 * @no: number of descriptors
371 *
372 * we manage a circular list that mirrors the hardware structure,
373 * except that the hardware uses bus addresses.
374 *
375 * returns 0 on success, <0 on failure
376 */
377static int
378spider_net_init_chain(struct spider_net_card *card,
379 struct spider_net_descr_chain *chain,
380 struct spider_net_descr *start_descr, int no)
381{
382 int i;
383 struct spider_net_descr *descr;
384
385 spin_lock_init(&card->chain_lock);
386
387 descr = start_descr;
388 memset(descr, 0, sizeof(*descr) * no);
389
390 /* set up the hardware pointers in each descriptor */
391 for (i=0; i<no; i++, descr++) {
392 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
393
394 descr->bus_addr =
395 pci_map_single(card->pdev, descr,
396 SPIDER_NET_DESCR_SIZE,
397 PCI_DMA_BIDIRECTIONAL);
398
399 if (descr->bus_addr == DMA_ERROR_CODE)
400 goto iommu_error;
401
402 descr->next = descr + 1;
403 descr->prev = descr - 1;
404
405 }
406 /* do actual circular list */
407 (descr-1)->next = start_descr;
408 start_descr->prev = descr-1;
409
410 descr = start_descr;
411 for (i=0; i < no; i++, descr++) {
412 descr->next_descr_addr = descr->next->bus_addr;
413 }
414
415 chain->head = start_descr;
416 chain->tail = start_descr;
417
418 return 0;
419
420iommu_error:
421 descr = start_descr;
422 for (i=0; i < no; i++, descr++)
423 if (descr->bus_addr)
424 pci_unmap_single(card->pdev, descr->bus_addr,
425 SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
426 return -ENOMEM;
427}
428
429/**
430 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
431 * @card: card structure
432 *
433 * returns 0 on success, <0 on failure
434 */
435static void
436spider_net_free_rx_chain_contents(struct spider_net_card *card)
437{
438 struct spider_net_descr *descr;
439
440 descr = card->rx_chain.head;
441 while (descr->next != card->rx_chain.head) {
442 if (descr->skb) {
443 dev_kfree_skb(descr->skb);
444 pci_unmap_single(card->pdev, descr->buf_addr,
445 SPIDER_NET_MAX_MTU,
446 PCI_DMA_BIDIRECTIONAL);
447 }
448 descr = descr->next;
449 }
450}
451
452/**
453 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
454 * @card: card structure
455 * @descr: descriptor to re-init
456 *
457 * return 0 on succes, <0 on failure
458 *
459 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
460 * Activate the descriptor state-wise
461 */
462static int
463spider_net_prepare_rx_descr(struct spider_net_card *card,
464 struct spider_net_descr *descr)
465{
466 int error = 0;
467 int offset;
468 int bufsize;
469
470 /* we need to round up the buffer size to a multiple of 128 */
471 bufsize = (SPIDER_NET_MAX_MTU + SPIDER_NET_RXBUF_ALIGN - 1) &
472 (~(SPIDER_NET_RXBUF_ALIGN - 1));
473
474 /* and we need to have it 128 byte aligned, therefore we allocate a
475 * bit more */
476 /* allocate an skb */
477 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
478 if (!descr->skb) {
479 if (net_ratelimit())
480 if (netif_msg_rx_err(card))
481 pr_err("Not enough memory to allocate "
482 "rx buffer\n");
483 return -ENOMEM;
484 }
485 descr->buf_size = bufsize;
486 descr->result_size = 0;
487 descr->valid_size = 0;
488 descr->data_status = 0;
489 descr->data_error = 0;
490
491 offset = ((unsigned long)descr->skb->data) &
492 (SPIDER_NET_RXBUF_ALIGN - 1);
493 if (offset)
494 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
495 /* io-mmu-map the skb */
496 descr->buf_addr = pci_map_single(card->pdev, descr->skb->data,
497 SPIDER_NET_MAX_MTU,
498 PCI_DMA_BIDIRECTIONAL);
499 if (descr->buf_addr == DMA_ERROR_CODE) {
500 dev_kfree_skb_any(descr->skb);
501 if (netif_msg_rx_err(card))
502 pr_err("Could not iommu-map rx buffer\n");
503 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
504 } else {
505 descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED;
506 }
507
508 return error;
509}
510
511/**
512 * spider_net_enable_rxctails - sets RX dmac chain tail addresses
513 * @card: card structure
514 *
515 * spider_net_enable_rxctails sets the RX DMAC chain tail adresses in the
516 * chip by writing to the appropriate register. DMA is enabled in
517 * spider_net_enable_rxdmac.
518 */
519static void
520spider_net_enable_rxchtails(struct spider_net_card *card)
521{
522 /* assume chain is aligned correctly */
523 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
524 card->rx_chain.tail->bus_addr);
525}
526
527/**
528 * spider_net_enable_rxdmac - enables a receive DMA controller
529 * @card: card structure
530 *
531 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
532 * in the GDADMACCNTR register
533 */
534static void
535spider_net_enable_rxdmac(struct spider_net_card *card)
536{
537 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
538 SPIDER_NET_DMA_RX_VALUE);
539}
540
541/**
542 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
543 * @card: card structure
544 *
545 * refills descriptors in all chains (last used chain first): allocates skbs
546 * and iommu-maps them.
547 */
548static void
549spider_net_refill_rx_chain(struct spider_net_card *card)
550{
551 struct spider_net_descr_chain *chain;
552 int count = 0;
553 unsigned long flags;
554
555 chain = &card->rx_chain;
556
557 spin_lock_irqsave(&card->chain_lock, flags);
558 while (spider_net_get_descr_status(chain->head) ==
559 SPIDER_NET_DESCR_NOT_IN_USE) {
560 if (spider_net_prepare_rx_descr(card, chain->head))
561 break;
562 count++;
563 chain->head = chain->head->next;
564 }
565 spin_unlock_irqrestore(&card->chain_lock, flags);
566
567 /* could be optimized, only do that, if we know the DMA processing
568 * has terminated */
569 if (count)
570 spider_net_enable_rxdmac(card);
571}
572
573/**
574 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
575 * @card: card structure
576 *
577 * returns 0 on success, <0 on failure
578 */
579static int
580spider_net_alloc_rx_skbs(struct spider_net_card *card)
581{
582 int result;
583 struct spider_net_descr_chain *chain;
584
585 result = -ENOMEM;
586
587 chain = &card->rx_chain;
588 /* put at least one buffer into the chain. if this fails,
589 * we've got a problem. if not, spider_net_refill_rx_chain
590 * will do the rest at the end of this function */
591 if (spider_net_prepare_rx_descr(card, chain->head))
592 goto error;
593 else
594 chain->head = chain->head->next;
595
596 /* this will allocate the rest of the rx buffers; if not, it's
597 * business as usual later on */
598 spider_net_refill_rx_chain(card);
599 return 0;
600
601error:
602 spider_net_free_rx_chain_contents(card);
603 return result;
604}
605
606/**
607 * spider_net_release_tx_descr - processes a used tx descriptor
608 * @card: card structure
609 * @descr: descriptor to release
610 *
611 * releases a used tx descriptor (unmapping, freeing of skb)
612 */
613static void
614spider_net_release_tx_descr(struct spider_net_card *card,
615 struct spider_net_descr *descr)
616{
617 struct sk_buff *skb;
618
619 /* unmap the skb */
620 skb = descr->skb;
621 pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
622 PCI_DMA_BIDIRECTIONAL);
623
624 dev_kfree_skb_any(skb);
625
626 /* set status to not used */
627 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
628}
629
630/**
631 * spider_net_release_tx_chain - processes sent tx descriptors
632 * @card: adapter structure
633 * @brutal: if set, don't care about whether descriptor seems to be in use
634 *
635 * releases the tx descriptors that spider has finished with (if non-brutal)
636 * or simply release tx descriptors (if brutal)
637 */
638static void
639spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
640{
641 struct spider_net_descr_chain *tx_chain = &card->tx_chain;
642 enum spider_net_descr_status status;
643
644 spider_net_tx_irq_off(card);
645
646 /* no lock for chain needed, if this is only executed once at a time */
647again:
648 for (;;) {
649 status = spider_net_get_descr_status(tx_chain->tail);
650 switch (status) {
651 case SPIDER_NET_DESCR_CARDOWNED:
652 if (!brutal) goto out;
653 /* fallthrough, if we release the descriptors
654 * brutally (then we don't care about
655 * SPIDER_NET_DESCR_CARDOWNED) */
656 case SPIDER_NET_DESCR_RESPONSE_ERROR:
657 case SPIDER_NET_DESCR_PROTECTION_ERROR:
658 case SPIDER_NET_DESCR_FORCE_END:
659 if (netif_msg_tx_err(card))
660 pr_err("%s: forcing end of tx descriptor "
661 "with status x%02x\n",
662 card->netdev->name, status);
663 card->netdev_stats.tx_dropped++;
664 break;
665
666 case SPIDER_NET_DESCR_COMPLETE:
667 card->netdev_stats.tx_packets++;
668 card->netdev_stats.tx_bytes +=
669 tx_chain->tail->skb->len;
670 break;
671
672 default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */
673 goto out;
674 }
675 spider_net_release_tx_descr(card, tx_chain->tail);
676 tx_chain->tail = tx_chain->tail->next;
677 }
678out:
679 netif_wake_queue(card->netdev);
680
681 if (!brutal) {
682 /* switch on tx irqs (while we are still in the interrupt
683 * handler, so we don't get an interrupt), check again
684 * for done descriptors. This results in fewer interrupts */
685 spider_net_tx_irq_on(card);
686 status = spider_net_get_descr_status(tx_chain->tail);
687 switch (status) {
688 case SPIDER_NET_DESCR_RESPONSE_ERROR:
689 case SPIDER_NET_DESCR_PROTECTION_ERROR:
690 case SPIDER_NET_DESCR_FORCE_END:
691 case SPIDER_NET_DESCR_COMPLETE:
692 goto again;
693 default:
694 break;
695 }
696 }
697
698}
699
700/**
701 * spider_net_get_multicast_hash - generates hash for multicast filter table
702 * @addr: multicast address
703 *
704 * returns the hash value.
705 *
706 * spider_net_get_multicast_hash calculates a hash value for a given multicast
707 * address, that is used to set the multicast filter tables
708 */
709static u8
710spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
711{
712 /* FIXME: an addr of 01:00:5e:00:00:01 must result in 0xa9,
713 * ff:ff:ff:ff:ff:ff must result in 0xfd */
714 u32 crc;
715 u8 hash;
716
717 crc = crc32_be(~0, addr, netdev->addr_len);
718
719 hash = (crc >> 27);
720 hash <<= 3;
721 hash |= crc & 7;
722
723 return hash;
724}
725
726/**
727 * spider_net_set_multi - sets multicast addresses and promisc flags
728 * @netdev: interface device structure
729 *
730 * spider_net_set_multi configures multicast addresses as needed for the
731 * netdev interface. It also sets up multicast, allmulti and promisc
732 * flags appropriately
733 */
734static void
735spider_net_set_multi(struct net_device *netdev)
736{
737 struct dev_mc_list *mc;
738 u8 hash;
739 int i;
740 u32 reg;
741 struct spider_net_card *card = netdev_priv(netdev);
742 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
743 {0, };
744
745 spider_net_set_promisc(card);
746
747 if (netdev->flags & IFF_ALLMULTI) {
748 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
749 set_bit(i, bitmask);
750 }
751 goto write_hash;
752 }
753
754 /* well, we know, what the broadcast hash value is: it's xfd
755 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
756 set_bit(0xfd, bitmask);
757
758 for (mc = netdev->mc_list; mc; mc = mc->next) {
759 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
760 set_bit(hash, bitmask);
761 }
762
763write_hash:
764 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
765 reg = 0;
766 if (test_bit(i * 4, bitmask))
767 reg += 0x08;
768 reg <<= 8;
769 if (test_bit(i * 4 + 1, bitmask))
770 reg += 0x08;
771 reg <<= 8;
772 if (test_bit(i * 4 + 2, bitmask))
773 reg += 0x08;
774 reg <<= 8;
775 if (test_bit(i * 4 + 3, bitmask))
776 reg += 0x08;
777
778 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
779 }
780}
781
782/**
783 * spider_net_disable_rxdmac - disables the receive DMA controller
784 * @card: card structure
785 *
786 * spider_net_disable_rxdmac terminates processing on the DMA controller by
787 * turing off DMA and issueing a force end
788 */
789static void
790spider_net_disable_rxdmac(struct spider_net_card *card)
791{
792 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
793 SPIDER_NET_DMA_RX_FEND_VALUE);
794}
795
796/**
797 * spider_net_stop - called upon ifconfig down
798 * @netdev: interface device structure
799 *
800 * always returns 0
801 */
802int
803spider_net_stop(struct net_device *netdev)
804{
805 struct spider_net_card *card = netdev_priv(netdev);
806
807 netif_poll_disable(netdev);
808 netif_carrier_off(netdev);
809 netif_stop_queue(netdev);
810
811 /* disable/mask all interrupts */
812 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
813 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
814 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
815
816 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
817 SPIDER_NET_DMA_TX_FEND_VALUE);
818
819 /* turn off DMA, force end */
820 spider_net_disable_rxdmac(card);
821
822 /* release chains */
823 spider_net_release_tx_chain(card, 1);
824
825 /* switch off card */
826 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
827 SPIDER_NET_CKRCTRL_STOP_VALUE);
828
829 spider_net_free_chain(card, &card->tx_chain);
830 spider_net_free_chain(card, &card->rx_chain);
831
832 return 0;
833}
834
835/**
836 * spider_net_get_next_tx_descr - returns the next available tx descriptor
837 * @card: device structure to get descriptor from
838 *
839 * returns the address of the next descriptor, or NULL if not available.
840 */
841static struct spider_net_descr *
842spider_net_get_next_tx_descr(struct spider_net_card *card)
843{
844 /* check, if head points to not-in-use descr */
845 if ( spider_net_get_descr_status(card->tx_chain.head) ==
846 SPIDER_NET_DESCR_NOT_IN_USE ) {
847 return card->tx_chain.head;
848 } else {
849 return NULL;
850 }
851}
852
853/**
854 * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field
855 * @descr: descriptor structure to fill out
856 * @skb: packet to consider
857 *
858 * fills out the command and status field of the descriptor structure,
859 * depending on hardware checksum settings. This function assumes a wmb()
860 * has executed before.
861 */
862static void
863spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr,
864 struct sk_buff *skb)
865{
866 if (skb->ip_summed != CHECKSUM_HW) {
867 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
868 return;
869 }
870
871 /* is packet ip?
872 * if yes: tcp? udp? */
873 if (skb->protocol == htons(ETH_P_IP)) {
874 if (skb->nh.iph->protocol == IPPROTO_TCP) {
875 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS;
876 } else if (skb->nh.iph->protocol == IPPROTO_UDP) {
877 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS;
878 } else { /* the stack should checksum non-tcp and non-udp
879 packets on his own: NETIF_F_IP_CSUM */
880 descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
881 }
882 }
883}
884
885/**
886 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
887 * @card: card structure
888 * @descr: descriptor structure to fill out
889 * @skb: packet to use
890 *
891 * returns 0 on success, <0 on failure.
892 *
893 * fills out the descriptor structure with skb data and len. Copies data,
894 * if needed (32bit DMA!)
895 */
896static int
897spider_net_prepare_tx_descr(struct spider_net_card *card,
898 struct spider_net_descr *descr,
899 struct sk_buff *skb)
900{
901 descr->buf_addr = pci_map_single(card->pdev, skb->data,
902 skb->len, PCI_DMA_BIDIRECTIONAL);
903 if (descr->buf_addr == DMA_ERROR_CODE) {
904 if (netif_msg_tx_err(card))
905 pr_err("could not iommu-map packet (%p, %i). "
906 "Dropping packet\n", skb->data, skb->len);
907 return -ENOMEM;
908 }
909
910 descr->buf_size = skb->len;
911 descr->skb = skb;
912 descr->data_status = 0;
913
914 /* make sure the above values are in memory before we change the
915 * status */
916 wmb();
917
918 spider_net_set_txdescr_cmdstat(descr,skb);
919
920 return 0;
921}
922
923/**
924 * spider_net_kick_tx_dma - enables TX DMA processing
925 * @card: card structure
926 * @descr: descriptor address to enable TX processing at
927 *
928 * spider_net_kick_tx_dma writes the current tx chain head as start address
929 * of the tx descriptor chain and enables the transmission DMA engine
930 */
931static void
932spider_net_kick_tx_dma(struct spider_net_card *card,
933 struct spider_net_descr *descr)
934{
935 /* this is the only descriptor in the output chain.
936 * Enable TX DMA */
937
938 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
939 descr->bus_addr);
940
941 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
942 SPIDER_NET_DMA_TX_VALUE);
943}
944
945/**
946 * spider_net_xmit - transmits a frame over the device
947 * @skb: packet to send out
948 * @netdev: interface device structure
949 *
950 * returns 0 on success, <0 on failure
951 */
952static int
953spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
954{
955 struct spider_net_card *card = netdev_priv(netdev);
956 struct spider_net_descr *descr;
957 int result;
958
959 descr = spider_net_get_next_tx_descr(card);
960
961 if (!descr) {
962 netif_stop_queue(netdev);
963
964 descr = spider_net_get_next_tx_descr(card);
965 if (!descr)
966 goto error;
967 else
968 netif_start_queue(netdev);
969 }
970
971 result = spider_net_prepare_tx_descr(card, descr, skb);
972 if (result)
973 goto error;
974
975 card->tx_chain.head = card->tx_chain.head->next;
976
977 /* make sure the status from spider_net_prepare_tx_descr is in
978 * memory before we check out the previous descriptor */
979 wmb();
980
981 if (spider_net_get_descr_status(descr->prev) !=
982 SPIDER_NET_DESCR_CARDOWNED)
983 spider_net_kick_tx_dma(card, descr);
984
985 return NETDEV_TX_OK;
986
987error:
988 card->netdev_stats.tx_dropped++;
989 return NETDEV_TX_LOCKED;
990}
991
992/**
993 * spider_net_do_ioctl - called for device ioctls
994 * @netdev: interface device structure
995 * @ifr: request parameter structure for ioctl
996 * @cmd: command code for ioctl
997 *
998 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
999 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
1000 */
1001static int
1002spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1003{
1004 switch (cmd) {
1005 default:
1006 return -EOPNOTSUPP;
1007 }
1008}
1009
1010/**
1011 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
1012 * @descr: descriptor to process
1013 * @card: card structure
1014 *
1015 * returns 1 on success, 0 if no packet was passed to the stack
1016 *
1017 * iommu-unmaps the skb, fills out skb structure and passes the data to the
1018 * stack. The descriptor state is not changed.
1019 */
1020static int
1021spider_net_pass_skb_up(struct spider_net_descr *descr,
1022 struct spider_net_card *card)
1023{
1024 struct sk_buff *skb;
1025 struct net_device *netdev;
1026 u32 data_status, data_error;
1027
1028 data_status = descr->data_status;
1029 data_error = descr->data_error;
1030
1031 netdev = card->netdev;
1032
1033 /* check for errors in the data_error flag */
1034 if ((data_error & SPIDER_NET_DATA_ERROR_MASK) &&
1035 netif_msg_rx_err(card))
1036 pr_err("error in received descriptor found, "
1037 "data_status=x%08x, data_error=x%08x\n",
1038 data_status, data_error);
1039
1040 /* prepare skb, unmap descriptor */
1041 skb = descr->skb;
1042 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_MTU,
1043 PCI_DMA_BIDIRECTIONAL);
1044
1045 /* the cases we'll throw away the packet immediately */
1046 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS)
1047 return 0;
1048
1049 skb->dev = netdev;
1050 skb_put(skb, descr->valid_size);
1051
1052 /* the card seems to add 2 bytes of junk in front
1053 * of the ethernet frame */
1054#define SPIDER_MISALIGN 2
1055 skb_pull(skb, SPIDER_MISALIGN);
1056 skb->protocol = eth_type_trans(skb, netdev);
1057
1058 /* checksum offload */
1059 if (card->options.rx_csum) {
1060 if ( (data_status & SPIDER_NET_DATA_STATUS_CHK_MASK) &&
1061 (!(data_error & SPIDER_NET_DATA_ERROR_CHK_MASK)) )
1062 skb->ip_summed = CHECKSUM_UNNECESSARY;
1063 else
1064 skb->ip_summed = CHECKSUM_NONE;
1065 } else {
1066 skb->ip_summed = CHECKSUM_NONE;
1067 }
1068
1069 if (data_status & SPIDER_NET_VLAN_PACKET) {
1070 /* further enhancements: HW-accel VLAN
1071 * vlan_hwaccel_receive_skb
1072 */
1073 }
1074
1075 /* pass skb up to stack */
1076 netif_receive_skb(skb);
1077
1078 /* update netdevice statistics */
1079 card->netdev_stats.rx_packets++;
1080 card->netdev_stats.rx_bytes += skb->len;
1081
1082 return 1;
1083}
1084
1085/**
1086 * spider_net_decode_descr - processes an rx descriptor
1087 * @card: card structure
1088 *
1089 * returns 1 if a packet has been sent to the stack, otherwise 0
1090 *
1091 * processes an rx descriptor by iommu-unmapping the data buffer and passing
1092 * the packet up to the stack
1093 */
1094static int
1095spider_net_decode_one_descr(struct spider_net_card *card)
1096{
1097 enum spider_net_descr_status status;
1098 struct spider_net_descr *descr;
1099 struct spider_net_descr_chain *chain;
1100 int result;
1101
1102 chain = &card->rx_chain;
1103 descr = chain->tail;
1104
1105 status = spider_net_get_descr_status(descr);
1106
1107 if (status == SPIDER_NET_DESCR_CARDOWNED) {
1108 /* nothing in the descriptor yet */
1109 return 0;
1110 }
1111
1112 if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
1113 /* not initialized yet, I bet chain->tail == chain->head
1114 * and the ring is empty */
1115 spider_net_refill_rx_chain(card);
1116 return 0;
1117 }
1118
1119 /* descriptor definitively used -- move on head */
1120 chain->tail = descr->next;
1121
1122 result = 0;
1123 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1124 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1125 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1126 if (netif_msg_rx_err(card))
1127 pr_err("%s: dropping RX descriptor with state %d\n",
1128 card->netdev->name, status);
1129 card->netdev_stats.rx_dropped++;
1130 goto refill;
1131 }
1132
1133 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1134 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1135 if (netif_msg_rx_err(card))
1136 pr_err("%s: RX descriptor with state %d\n",
1137 card->netdev->name, status);
1138 goto refill;
1139 }
1140
1141 /* ok, we've got a packet in descr */
1142 result = spider_net_pass_skb_up(descr, card);
1143refill:
1144 spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
1145 /* change the descriptor state: */
1146 spider_net_refill_rx_chain(card);
1147
1148 return result;
1149}
1150
1151/**
1152 * spider_net_poll - NAPI poll function called by the stack to return packets
1153 * @netdev: interface device structure
1154 * @budget: number of packets we can pass to the stack at most
1155 *
1156 * returns 0 if no more packets available to the driver/stack. Returns 1,
1157 * if the quota is exceeded, but the driver has still packets.
1158 *
1159 * spider_net_poll returns all packets from the rx descriptors to the stack
1160 * (using netif_receive_skb). If all/enough packets are up, the driver
1161 * reenables interrupts and returns 0. If not, 1 is returned.
1162 */
1163static int
1164spider_net_poll(struct net_device *netdev, int *budget)
1165{
1166 struct spider_net_card *card = netdev_priv(netdev);
1167 int packets_to_do, packets_done = 0;
1168 int no_more_packets = 0;
1169
1170 packets_to_do = min(*budget, netdev->quota);
1171
1172 while (packets_to_do) {
1173 if (spider_net_decode_one_descr(card)) {
1174 packets_done++;
1175 packets_to_do--;
1176 } else {
1177 /* no more packets for the stack */
1178 no_more_packets = 1;
1179 break;
1180 }
1181 }
1182
1183 netdev->quota -= packets_done;
1184 *budget -= packets_done;
1185
1186 /* if all packets are in the stack, enable interrupts and return 0 */
1187 /* if not, return 1 */
1188 if (no_more_packets) {
1189 netif_rx_complete(netdev);
1190 spider_net_rx_irq_on(card);
1191 return 0;
1192 }
1193
1194 return 1;
1195}
1196
1197/**
1198 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1199 * @netdev: interface device structure
1200 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1201 */
1202static void
1203spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1204{
1205 /* further enhancement... yet to do */
1206 return;
1207}
1208
1209/**
1210 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1211 * @netdev: interface device structure
1212 * @vid: VLAN id to add
1213 */
1214static void
1215spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1216{
1217 /* further enhancement... yet to do */
1218 /* add vid to card's VLAN filter table */
1219 return;
1220}
1221
1222/**
1223 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1224 * @netdev: interface device structure
1225 * @vid: VLAN id to remove
1226 */
1227static void
1228spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1229{
1230 /* further enhancement... yet to do */
1231 /* remove vid from card's VLAN filter table */
1232}
1233
1234/**
1235 * spider_net_get_stats - get interface statistics
1236 * @netdev: interface device structure
1237 *
1238 * returns the interface statistics residing in the spider_net_card struct
1239 */
1240static struct net_device_stats *
1241spider_net_get_stats(struct net_device *netdev)
1242{
1243 struct spider_net_card *card = netdev_priv(netdev);
1244 struct net_device_stats *stats = &card->netdev_stats;
1245 return stats;
1246}
1247
1248/**
1249 * spider_net_change_mtu - changes the MTU of an interface
1250 * @netdev: interface device structure
1251 * @new_mtu: new MTU value
1252 *
1253 * returns 0 on success, <0 on failure
1254 */
1255static int
1256spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1257{
1258 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1259 * and mtu is outbound only anyway */
1260 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1261 (new_mtu > SPIDER_NET_MAX_MTU) )
1262 return -EINVAL;
1263 netdev->mtu = new_mtu;
1264 return 0;
1265}
1266
1267/**
1268 * spider_net_set_mac - sets the MAC of an interface
1269 * @netdev: interface device structure
1270 * @ptr: pointer to new MAC address
1271 *
1272 * Returns 0 on success, <0 on failure. Currently, we don't support this
1273 * and will always return EOPNOTSUPP.
1274 */
1275static int
1276spider_net_set_mac(struct net_device *netdev, void *p)
1277{
1278 struct spider_net_card *card = netdev_priv(netdev);
1279 u32 macl, macu;
1280 struct sockaddr *addr = p;
1281
1282 /* GMACTPE and GMACRPE must be off, so we only allow this, if
1283 * the device is down */
1284 if (netdev->flags & IFF_UP)
1285 return -EBUSY;
1286
1287 if (!is_valid_ether_addr(addr->sa_data))
1288 return -EADDRNOTAVAIL;
1289
1290 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1291 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1292 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1293 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1294 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1295
1296 spider_net_set_promisc(card);
1297
1298 /* look up, whether we have been successful */
1299 if (spider_net_get_mac_address(netdev))
1300 return -EADDRNOTAVAIL;
1301 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1302 return -EADDRNOTAVAIL;
1303
1304 return 0;
1305}
1306
1307/**
1308 * spider_net_enable_txdmac - enables a TX DMA controller
1309 * @card: card structure
1310 *
1311 * spider_net_enable_txdmac enables the TX DMA controller by setting the
1312 * descriptor chain tail address
1313 */
1314static void
1315spider_net_enable_txdmac(struct spider_net_card *card)
1316{
1317 /* assume chain is aligned correctly */
1318 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
1319 card->tx_chain.tail->bus_addr);
1320}
1321
1322/**
1323 * spider_net_handle_error_irq - handles errors raised by an interrupt
1324 * @card: card structure
1325 * @status_reg: interrupt status register 0 (GHIINT0STS)
1326 *
1327 * spider_net_handle_error_irq treats or ignores all error conditions
1328 * found when an interrupt is presented
1329 */
1330static void
1331spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1332{
1333 u32 error_reg1, error_reg2;
1334 u32 i;
1335 int show_error = 1;
1336
1337 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1338 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1339
1340 /* check GHIINT0STS ************************************/
1341 if (status_reg)
1342 for (i = 0; i < 32; i++)
1343 if (status_reg & (1<<i))
1344 switch (i)
1345 {
1346 /* let error_reg1 and error_reg2 evaluation decide, what to do
1347 case SPIDER_NET_PHYINT:
1348 case SPIDER_NET_GMAC2INT:
1349 case SPIDER_NET_GMAC1INT:
1350 case SPIDER_NET_GIPSINT:
1351 case SPIDER_NET_GFIFOINT:
1352 case SPIDER_NET_DMACINT:
1353 case SPIDER_NET_GSYSINT:
1354 break; */
1355
1356 case SPIDER_NET_GPWOPCMPINT:
1357 /* PHY write operation completed */
1358 show_error = 0;
1359 break;
1360 case SPIDER_NET_GPROPCMPINT:
1361 /* PHY read operation completed */
1362 /* we don't use semaphores, as we poll for the completion
1363 * of the read operation in spider_net_read_phy. Should take
1364 * about 50 us */
1365 show_error = 0;
1366 break;
1367 case SPIDER_NET_GPWFFINT:
1368 /* PHY command queue full */
1369 if (netif_msg_intr(card))
1370 pr_err("PHY write queue full\n");
1371 show_error = 0;
1372 break;
1373
1374 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1375 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1376 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1377
1378 case SPIDER_NET_GDTDEN0INT:
1379 /* someone has set TX_DMA_EN to 0 */
1380 show_error = 0;
1381 break;
1382
1383 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1384 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1385 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1386 case SPIDER_NET_GDADEN0INT:
1387 /* someone has set RX_DMA_EN to 0 */
1388 show_error = 0;
1389 break;
1390
1391 /* RX interrupts */
1392 case SPIDER_NET_GDDFDCINT:
1393 case SPIDER_NET_GDCFDCINT:
1394 case SPIDER_NET_GDBFDCINT:
1395 case SPIDER_NET_GDAFDCINT:
1396 /* case SPIDER_NET_GDNMINT: not used. print a message */
1397 /* case SPIDER_NET_GCNMINT: not used. print a message */
1398 /* case SPIDER_NET_GBNMINT: not used. print a message */
1399 /* case SPIDER_NET_GANMINT: not used. print a message */
1400 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1401 show_error = 0;
1402 break;
1403
1404 /* TX interrupts */
1405 case SPIDER_NET_GDTFDCINT:
1406 show_error = 0;
1407 break;
1408 case SPIDER_NET_GTTEDINT:
1409 show_error = 0;
1410 break;
1411 case SPIDER_NET_GDTDCEINT:
1412 /* chain end. If a descriptor should be sent, kick off
1413 * tx dma
1414 if (card->tx_chain.tail == card->tx_chain.head)
1415 spider_net_kick_tx_dma(card);
1416 show_error = 0; */
1417 break;
1418
1419 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1420 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1421 }
1422
1423 /* check GHIINT1STS ************************************/
1424 if (error_reg1)
1425 for (i = 0; i < 32; i++)
1426 if (error_reg1 & (1<<i))
1427 switch (i)
1428 {
1429 case SPIDER_NET_GTMFLLINT:
1430 if (netif_msg_intr(card))
1431 pr_err("Spider TX RAM full\n");
1432 show_error = 0;
1433 break;
1434 case SPIDER_NET_GRMFLLINT:
1435 if (netif_msg_intr(card))
1436 pr_err("Spider RX RAM full, incoming packets "
1437 "might be discarded !\n");
1438 netif_rx_schedule(card->netdev);
1439 spider_net_enable_rxchtails(card);
1440 spider_net_enable_rxdmac(card);
1441 break;
1442
1443 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1444 case SPIDER_NET_GDTINVDINT:
1445 /* allrighty. tx from previous descr ok */
1446 show_error = 0;
1447 break;
1448 /* case SPIDER_NET_GRFDFLLINT: print a message down there */
1449 /* case SPIDER_NET_GRFCFLLINT: print a message down there */
1450 /* case SPIDER_NET_GRFBFLLINT: print a message down there */
1451 /* case SPIDER_NET_GRFAFLLINT: print a message down there */
1452
1453 /* chain end */
1454 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1455 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1456 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1457 case SPIDER_NET_GDADCEINT:
1458 if (netif_msg_intr(card))
1459 pr_err("got descriptor chain end interrupt, "
1460 "restarting DMAC %c.\n",
1461 'D'+i-SPIDER_NET_GDDDCEINT);
1462 spider_net_refill_rx_chain(card);
1463 show_error = 0;
1464 break;
1465
1466 /* invalid descriptor */
1467 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1468 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1469 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1470 case SPIDER_NET_GDAINVDINT:
1471 /* could happen when rx chain is full */
1472 spider_net_refill_rx_chain(card);
1473 show_error = 0;
1474 break;
1475
1476 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1477 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1478 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1479 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1480 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1481 /* case SPIDER_NET_GDSERINT: problem, print a message */
1482 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1483 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1484 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1485 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1486 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1487 default:
1488 show_error = 1;
1489 break;
1490 }
1491
1492 /* check GHIINT2STS ************************************/
1493 if (error_reg2)
1494 for (i = 0; i < 32; i++)
1495 if (error_reg2 & (1<<i))
1496 switch (i)
1497 {
1498 /* there is nothing we can (want to) do at this time. Log a
1499 * message, we can switch on and off the specific values later on
1500 case SPIDER_NET_GPROPERINT:
1501 case SPIDER_NET_GMCTCRSNGINT:
1502 case SPIDER_NET_GMCTLCOLINT:
1503 case SPIDER_NET_GMCTTMOTINT:
1504 case SPIDER_NET_GMCRCAERINT:
1505 case SPIDER_NET_GMCRCALERINT:
1506 case SPIDER_NET_GMCRALNERINT:
1507 case SPIDER_NET_GMCROVRINT:
1508 case SPIDER_NET_GMCRRNTINT:
1509 case SPIDER_NET_GMCRRXERINT:
1510 case SPIDER_NET_GTITCSERINT:
1511 case SPIDER_NET_GTIFMTERINT:
1512 case SPIDER_NET_GTIPKTRVKINT:
1513 case SPIDER_NET_GTISPINGINT:
1514 case SPIDER_NET_GTISADNGINT:
1515 case SPIDER_NET_GTISPDNGINT:
1516 case SPIDER_NET_GRIFMTERINT:
1517 case SPIDER_NET_GRIPKTRVKINT:
1518 case SPIDER_NET_GRISPINGINT:
1519 case SPIDER_NET_GRISADNGINT:
1520 case SPIDER_NET_GRISPDNGINT:
1521 break;
1522 */
1523 default:
1524 break;
1525 }
1526
1527 if ((show_error) && (netif_msg_intr(card)))
1528 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1529 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1530 status_reg, error_reg1, error_reg2);
1531
1532 /* clear interrupt sources */
1533 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1534 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1535}
1536
1537/**
1538 * spider_net_interrupt - interrupt handler for spider_net
1539 * @irq: interupt number
1540 * @ptr: pointer to net_device
1541 * @regs: PU registers
1542 *
1543 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1544 * interrupt found raised by card.
1545 *
1546 * This is the interrupt handler, that turns off
1547 * interrupts for this device and makes the stack poll the driver
1548 */
1549static irqreturn_t
1550spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs)
1551{
1552 struct net_device *netdev = ptr;
1553 struct spider_net_card *card = netdev_priv(netdev);
1554 u32 status_reg;
1555
1556 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1557
1558 if (!status_reg)
1559 return IRQ_NONE;
1560
1561 if (status_reg & SPIDER_NET_TXINT)
1562 spider_net_release_tx_chain(card, 0);
1563
1564 if (status_reg & SPIDER_NET_RXINT ) {
1565 spider_net_rx_irq_off(card);
1566 netif_rx_schedule(netdev);
1567 }
1568
1569 /* we do this after rx and tx processing, as we want the tx chain
1570 * processed to see, whether we should restart tx dma processing */
1571 spider_net_handle_error_irq(card, status_reg);
1572
1573 /* clear interrupt sources */
1574 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1575
1576 return IRQ_HANDLED;
1577}
1578
1579#ifdef CONFIG_NET_POLL_CONTROLLER
1580/**
1581 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1582 * @netdev: interface device structure
1583 *
1584 * see Documentation/networking/netconsole.txt
1585 */
1586static void
1587spider_net_poll_controller(struct net_device *netdev)
1588{
1589 disable_irq(netdev->irq);
1590 spider_net_interrupt(netdev->irq, netdev, NULL);
1591 enable_irq(netdev->irq);
1592}
1593#endif /* CONFIG_NET_POLL_CONTROLLER */
1594
1595/**
1596 * spider_net_init_card - initializes the card
1597 * @card: card structure
1598 *
1599 * spider_net_init_card initializes the card so that other registers can
1600 * be used
1601 */
1602static void
1603spider_net_init_card(struct spider_net_card *card)
1604{
1605 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1606 SPIDER_NET_CKRCTRL_STOP_VALUE);
1607
1608 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1609 SPIDER_NET_CKRCTRL_RUN_VALUE);
1610}
1611
1612/**
1613 * spider_net_enable_card - enables the card by setting all kinds of regs
1614 * @card: card structure
1615 *
1616 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1617 */
1618static void
1619spider_net_enable_card(struct spider_net_card *card)
1620{
1621 int i;
1622 /* the following array consists of (register),(value) pairs
1623 * that are set in this function. A register of 0 ends the list */
1624 u32 regs[][2] = {
1625 { SPIDER_NET_GRESUMINTNUM, 0 },
1626 { SPIDER_NET_GREINTNUM, 0 },
1627
1628 /* set interrupt frame number registers */
1629 /* clear the single DMA engine registers first */
1630 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1631 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1632 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1633 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1634 /* then set, what we really need */
1635 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1636
1637 /* timer counter registers and stuff */
1638 { SPIDER_NET_GFREECNNUM, 0 },
1639 { SPIDER_NET_GONETIMENUM, 0 },
1640 { SPIDER_NET_GTOUTFRMNUM, 0 },
1641
1642 /* RX mode setting */
1643 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1644 /* TX mode setting */
1645 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1646 /* IPSEC mode setting */
1647 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1648
1649 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1650
1651 { SPIDER_NET_GMRWOLCTRL, 0 },
1652 { SPIDER_NET_GTESTMD, 0 },
1653
1654 { SPIDER_NET_GMACINTEN, 0 },
1655
1656 /* flow control stuff */
1657 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1658 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1659
1660 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1661 { 0, 0}
1662 };
1663
1664 i = 0;
1665 while (regs[i][0]) {
1666 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1667 i++;
1668 }
1669
1670 /* clear unicast filter table entries 1 to 14 */
1671 for (i = 1; i <= 14; i++) {
1672 spider_net_write_reg(card,
1673 SPIDER_NET_GMRUAFILnR + i * 8,
1674 0x00080000);
1675 spider_net_write_reg(card,
1676 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1677 0x00000000);
1678 }
1679
1680 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1681
1682 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1683
1684 /* set chain tail adress for RX chains and
1685 * enable DMA */
1686 spider_net_enable_rxchtails(card);
1687 spider_net_enable_rxdmac(card);
1688
1689 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1690
1691 /* set chain tail adress for TX chain */
1692 spider_net_enable_txdmac(card);
1693
1694 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1695 SPIDER_NET_LENLMT_VALUE);
1696 spider_net_write_reg(card, SPIDER_NET_GMACMODE,
1697 SPIDER_NET_MACMODE_VALUE);
1698 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1699 SPIDER_NET_OPMODE_VALUE);
1700
1701 /* set interrupt mask registers */
1702 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1703 SPIDER_NET_INT0_MASK_VALUE);
1704 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1705 SPIDER_NET_INT1_MASK_VALUE);
1706 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1707 SPIDER_NET_INT2_MASK_VALUE);
1708}
1709
1710/**
1711 * spider_net_open - called upon ifonfig up
1712 * @netdev: interface device structure
1713 *
1714 * returns 0 on success, <0 on failure
1715 *
1716 * spider_net_open allocates all the descriptors and memory needed for
1717 * operation, sets up multicast list and enables interrupts
1718 */
1719int
1720spider_net_open(struct net_device *netdev)
1721{
1722 struct spider_net_card *card = netdev_priv(netdev);
1723 int result;
1724
1725 result = -ENOMEM;
1726 if (spider_net_init_chain(card, &card->tx_chain,
1727 card->descr, tx_descriptors))
1728 goto alloc_tx_failed;
1729 if (spider_net_init_chain(card, &card->rx_chain,
1730 card->descr + tx_descriptors, rx_descriptors))
1731 goto alloc_rx_failed;
1732
1733 /* allocate rx skbs */
1734 if (spider_net_alloc_rx_skbs(card))
1735 goto alloc_skbs_failed;
1736
1737 spider_net_set_multi(netdev);
1738
1739 /* further enhancement: setup hw vlan, if needed */
1740
1741 result = -EBUSY;
1742 if (request_irq(netdev->irq, spider_net_interrupt,
1743 SA_SHIRQ, netdev->name, netdev))
1744 goto register_int_failed;
1745
1746 spider_net_enable_card(card);
1747
1748 return 0;
1749
1750register_int_failed:
1751 spider_net_free_rx_chain_contents(card);
1752alloc_skbs_failed:
1753 spider_net_free_chain(card, &card->rx_chain);
1754alloc_rx_failed:
1755 spider_net_free_chain(card, &card->tx_chain);
1756alloc_tx_failed:
1757 return result;
1758}
1759
1760/**
1761 * spider_net_setup_phy - setup PHY
1762 * @card: card structure
1763 *
1764 * returns 0 on success, <0 on failure
1765 *
1766 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1767 * the PHY to 1000 Mbps
1768 **/
1769static int
1770spider_net_setup_phy(struct spider_net_card *card)
1771{
1772 struct mii_phy *phy = &card->phy;
1773
1774 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1775 SPIDER_NET_DMASEL_VALUE);
1776 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1777 SPIDER_NET_PHY_CTRL_VALUE);
1778 phy->mii_id = 1;
1779 phy->dev = card->netdev;
1780 phy->mdio_read = spider_net_read_phy;
1781 phy->mdio_write = spider_net_write_phy;
1782
1783 mii_phy_probe(phy, phy->mii_id);
1784
1785 if (phy->def->ops->setup_forced)
1786 phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
1787
1788 /* the following two writes could be moved to sungem_phy.c */
1789 /* enable fiber mode */
1790 spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x9020);
1791 /* LEDs active in both modes, autosense prio = fiber */
1792 spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x945f);
1793
1794 phy->def->ops->read_link(phy);
1795 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
1796 phy->speed, phy->duplex==1 ? "Full" : "Half");
1797
1798 return 0;
1799}
1800
1801/**
1802 * spider_net_download_firmware - loads firmware into the adapter
1803 * @card: card structure
1804 * @firmware: firmware pointer
1805 *
1806 * spider_net_download_firmware loads the firmware opened by
1807 * spider_net_init_firmware into the adapter.
1808 */
1809static void
1810spider_net_download_firmware(struct spider_net_card *card,
1811 const struct firmware *firmware)
1812{
1813 int sequencer, i;
1814 u32 *fw_ptr = (u32 *)firmware->data;
1815
1816 /* stop sequencers */
1817 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1818 SPIDER_NET_STOP_SEQ_VALUE);
1819
1820 for (sequencer = 0; sequencer < 6; sequencer++) {
1821 spider_net_write_reg(card,
1822 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
1823 for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
1824 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1825 sequencer * 8, *fw_ptr);
1826 fw_ptr++;
1827 }
1828 }
1829
1830 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1831 SPIDER_NET_RUN_SEQ_VALUE);
1832}
1833
1834/**
1835 * spider_net_init_firmware - reads in firmware parts
1836 * @card: card structure
1837 *
1838 * Returns 0 on success, <0 on failure
1839 *
1840 * spider_net_init_firmware opens the sequencer firmware and does some basic
1841 * checks. This function opens and releases the firmware structure. A call
1842 * to download the firmware is performed before the release.
1843 *
1844 * Firmware format
1845 * ===============
1846 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1847 * the program for each sequencer. Use the command
1848 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1849 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1850 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1851 *
1852 * to generate spider_fw.bin, if you have sequencer programs with something
1853 * like the following contents for each sequencer:
1854 * <ONE LINE COMMENT>
1855 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1856 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1857 * ...
1858 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1859 */
1860static int
1861spider_net_init_firmware(struct spider_net_card *card)
1862{
1863 const struct firmware *firmware;
1864 int err = -EIO;
1865
1866 if (request_firmware(&firmware,
1867 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) < 0) {
1868 if (netif_msg_probe(card))
1869 pr_err("Couldn't read in sequencer data file %s.\n",
1870 SPIDER_NET_FIRMWARE_NAME);
1871 firmware = NULL;
1872 goto out;
1873 }
1874
1875 if (firmware->size != 6 * SPIDER_NET_FIRMWARE_LEN * sizeof(u32)) {
1876 if (netif_msg_probe(card))
1877 pr_err("Invalid size of sequencer data file %s.\n",
1878 SPIDER_NET_FIRMWARE_NAME);
1879 goto out;
1880 }
1881
1882 spider_net_download_firmware(card, firmware);
1883
1884 err = 0;
1885out:
1886 release_firmware(firmware);
1887
1888 return err;
1889}
1890
1891/**
1892 * spider_net_workaround_rxramfull - work around firmware bug
1893 * @card: card structure
1894 *
1895 * no return value
1896 **/
1897static void
1898spider_net_workaround_rxramfull(struct spider_net_card *card)
1899{
1900 int i, sequencer = 0;
1901
1902 /* cancel reset */
1903 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1904 SPIDER_NET_CKRCTRL_RUN_VALUE);
1905
1906 /* empty sequencer data */
1907 for (sequencer = 0; sequencer < 6; sequencer++) {
1908 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1909 sequencer * 8, 0x0);
1910 for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
1911 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1912 sequencer * 8, 0x0);
1913 }
1914 }
1915
1916 /* set sequencer operation */
1917 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
1918
1919 /* reset */
1920 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1921 SPIDER_NET_CKRCTRL_STOP_VALUE);
1922}
1923
1924/**
1925 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1926 * function (to be called not under interrupt status)
1927 * @data: data, is interface device structure
1928 *
1929 * called as task when tx hangs, resets interface (if interface is up)
1930 */
1931static void
1932spider_net_tx_timeout_task(void *data)
1933{
1934 struct net_device *netdev = data;
1935 struct spider_net_card *card = netdev_priv(netdev);
1936
1937 if (!(netdev->flags & IFF_UP))
1938 goto out;
1939
1940 netif_device_detach(netdev);
1941 spider_net_stop(netdev);
1942
1943 spider_net_workaround_rxramfull(card);
1944 spider_net_init_card(card);
1945
1946 if (spider_net_setup_phy(card))
1947 goto out;
1948 if (spider_net_init_firmware(card))
1949 goto out;
1950
1951 spider_net_open(netdev);
1952 spider_net_kick_tx_dma(card, card->tx_chain.head);
1953 netif_device_attach(netdev);
1954
1955out:
1956 atomic_dec(&card->tx_timeout_task_counter);
1957}
1958
1959/**
1960 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1961 * @netdev: interface device structure
1962 *
1963 * called, if tx hangs. Schedules a task that resets the interface
1964 */
1965static void
1966spider_net_tx_timeout(struct net_device *netdev)
1967{
1968 struct spider_net_card *card;
1969
1970 card = netdev_priv(netdev);
1971 atomic_inc(&card->tx_timeout_task_counter);
1972 if (netdev->flags & IFF_UP)
1973 schedule_work(&card->tx_timeout_task);
1974 else
1975 atomic_dec(&card->tx_timeout_task_counter);
1976}
1977
1978/**
1979 * spider_net_setup_netdev_ops - initialization of net_device operations
1980 * @netdev: net_device structure
1981 *
1982 * fills out function pointers in the net_device structure
1983 */
1984static void
1985spider_net_setup_netdev_ops(struct net_device *netdev)
1986{
1987 netdev->open = &spider_net_open;
1988 netdev->stop = &spider_net_stop;
1989 netdev->hard_start_xmit = &spider_net_xmit;
1990 netdev->get_stats = &spider_net_get_stats;
1991 netdev->set_multicast_list = &spider_net_set_multi;
1992 netdev->set_mac_address = &spider_net_set_mac;
1993 netdev->change_mtu = &spider_net_change_mtu;
1994 netdev->do_ioctl = &spider_net_do_ioctl;
1995 /* tx watchdog */
1996 netdev->tx_timeout = &spider_net_tx_timeout;
1997 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
1998 /* NAPI */
1999 netdev->poll = &spider_net_poll;
2000 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2001 /* HW VLAN */
2002 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
2003 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
2004 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
2005#ifdef CONFIG_NET_POLL_CONTROLLER
2006 /* poll controller */
2007 netdev->poll_controller = &spider_net_poll_controller;
2008#endif /* CONFIG_NET_POLL_CONTROLLER */
2009 /* ethtool ops */
2010 netdev->ethtool_ops = &spider_net_ethtool_ops;
2011}
2012
2013/**
2014 * spider_net_setup_netdev - initialization of net_device
2015 * @card: card structure
2016 *
2017 * Returns 0 on success or <0 on failure
2018 *
2019 * spider_net_setup_netdev initializes the net_device structure
2020 **/
2021static int
2022spider_net_setup_netdev(struct spider_net_card *card)
2023{
2024 int result;
2025 struct net_device *netdev = card->netdev;
2026 struct device_node *dn;
2027 struct sockaddr addr;
2028 u8 *mac;
2029
2030 SET_MODULE_OWNER(netdev);
2031 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2032
2033 pci_set_drvdata(card->pdev, netdev);
2034 spin_lock_init(&card->intmask_lock);
2035 netdev->irq = card->pdev->irq;
2036
2037 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2038
2039 spider_net_setup_netdev_ops(netdev);
2040
2041 netdev->features = 0;
2042 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2043 * NETIF_F_HW_VLAN_FILTER */
2044
2045 netdev->irq = card->pdev->irq;
2046
2047 dn = pci_device_to_OF_node(card->pdev);
2048 mac = (u8 *)get_property(dn, "local-mac-address", NULL);
2049 memcpy(addr.sa_data, mac, ETH_ALEN);
2050
2051 result = spider_net_set_mac(netdev, &addr);
2052 if ((result) && (netif_msg_probe(card)))
2053 pr_err("Failed to set MAC address: %i\n", result);
2054
2055 result = register_netdev(netdev);
2056 if (result) {
2057 if (netif_msg_probe(card))
2058 pr_err("Couldn't register net_device: %i\n",
2059 result);
2060 return result;
2061 }
2062
2063 if (netif_msg_probe(card))
2064 pr_info("Initialized device %s.\n", netdev->name);
2065
2066 return 0;
2067}
2068
2069/**
2070 * spider_net_alloc_card - allocates net_device and card structure
2071 *
2072 * returns the card structure or NULL in case of errors
2073 *
2074 * the card and net_device structures are linked to each other
2075 */
2076static struct spider_net_card *
2077spider_net_alloc_card(void)
2078{
2079 struct net_device *netdev;
2080 struct spider_net_card *card;
2081 size_t alloc_size;
2082
2083 alloc_size = sizeof (*card) +
2084 sizeof (struct spider_net_descr) * rx_descriptors +
2085 sizeof (struct spider_net_descr) * tx_descriptors;
2086 netdev = alloc_etherdev(alloc_size);
2087 if (!netdev)
2088 return NULL;
2089
2090 card = netdev_priv(netdev);
2091 card->netdev = netdev;
2092 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2093 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
2094 init_waitqueue_head(&card->waitq);
2095 atomic_set(&card->tx_timeout_task_counter, 0);
2096
2097 return card;
2098}
2099
2100/**
2101 * spider_net_undo_pci_setup - releases PCI ressources
2102 * @card: card structure
2103 *
2104 * spider_net_undo_pci_setup releases the mapped regions
2105 */
2106static void
2107spider_net_undo_pci_setup(struct spider_net_card *card)
2108{
2109 iounmap(card->regs);
2110 pci_release_regions(card->pdev);
2111}
2112
2113/**
2114 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2115 * @card: card structure
2116 * @pdev: PCI device
2117 *
2118 * Returns the card structure or NULL if any errors occur
2119 *
2120 * spider_net_setup_pci_dev initializes pdev and together with the
2121 * functions called in spider_net_open configures the device so that
2122 * data can be transferred over it
2123 * The net_device structure is attached to the card structure, if the
2124 * function returns without error.
2125 **/
2126static struct spider_net_card *
2127spider_net_setup_pci_dev(struct pci_dev *pdev)
2128{
2129 struct spider_net_card *card;
2130 unsigned long mmio_start, mmio_len;
2131
2132 if (pci_enable_device(pdev)) {
2133 pr_err("Couldn't enable PCI device\n");
2134 return NULL;
2135 }
2136
2137 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2138 pr_err("Couldn't find proper PCI device base address.\n");
2139 goto out_disable_dev;
2140 }
2141
2142 if (pci_request_regions(pdev, spider_net_driver_name)) {
2143 pr_err("Couldn't obtain PCI resources, aborting.\n");
2144 goto out_disable_dev;
2145 }
2146
2147 pci_set_master(pdev);
2148
2149 card = spider_net_alloc_card();
2150 if (!card) {
2151 pr_err("Couldn't allocate net_device structure, "
2152 "aborting.\n");
2153 goto out_release_regions;
2154 }
2155 card->pdev = pdev;
2156
2157 /* fetch base address and length of first resource */
2158 mmio_start = pci_resource_start(pdev, 0);
2159 mmio_len = pci_resource_len(pdev, 0);
2160
2161 card->netdev->mem_start = mmio_start;
2162 card->netdev->mem_end = mmio_start + mmio_len;
2163 card->regs = ioremap(mmio_start, mmio_len);
2164
2165 if (!card->regs) {
2166 pr_err("Couldn't obtain PCI resources, aborting.\n");
2167 goto out_release_regions;
2168 }
2169
2170 return card;
2171
2172out_release_regions:
2173 pci_release_regions(pdev);
2174out_disable_dev:
2175 pci_disable_device(pdev);
2176 pci_set_drvdata(pdev, NULL);
2177 return NULL;
2178}
2179
2180/**
2181 * spider_net_probe - initialization of a device
2182 * @pdev: PCI device
2183 * @ent: entry in the device id list
2184 *
2185 * Returns 0 on success, <0 on failure
2186 *
2187 * spider_net_probe initializes pdev and registers a net_device
2188 * structure for it. After that, the device can be ifconfig'ed up
2189 **/
2190static int __devinit
2191spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2192{
2193 int err = -EIO;
2194 struct spider_net_card *card;
2195
2196 card = spider_net_setup_pci_dev(pdev);
2197 if (!card)
2198 goto out;
2199
2200 spider_net_workaround_rxramfull(card);
2201 spider_net_init_card(card);
2202
2203 err = spider_net_setup_phy(card);
2204 if (err)
2205 goto out_undo_pci;
2206
2207 err = spider_net_init_firmware(card);
2208 if (err)
2209 goto out_undo_pci;
2210
2211 err = spider_net_setup_netdev(card);
2212 if (err)
2213 goto out_undo_pci;
2214
2215 return 0;
2216
2217out_undo_pci:
2218 spider_net_undo_pci_setup(card);
2219 free_netdev(card->netdev);
2220out:
2221 return err;
2222}
2223
2224/**
2225 * spider_net_remove - removal of a device
2226 * @pdev: PCI device
2227 *
2228 * Returns 0 on success, <0 on failure
2229 *
2230 * spider_net_remove is called to remove the device and unregisters the
2231 * net_device
2232 **/
2233static void __devexit
2234spider_net_remove(struct pci_dev *pdev)
2235{
2236 struct net_device *netdev;
2237 struct spider_net_card *card;
2238
2239 netdev = pci_get_drvdata(pdev);
2240 card = netdev_priv(netdev);
2241
2242 wait_event(card->waitq,
2243 atomic_read(&card->tx_timeout_task_counter) == 0);
2244
2245 unregister_netdev(netdev);
2246 spider_net_undo_pci_setup(card);
2247 free_netdev(netdev);
2248
2249 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
2250}
2251
2252static struct pci_driver spider_net_driver = {
2253 .owner = THIS_MODULE,
2254 .name = spider_net_driver_name,
2255 .id_table = spider_net_pci_tbl,
2256 .probe = spider_net_probe,
2257 .remove = __devexit_p(spider_net_remove)
2258};
2259
2260/**
2261 * spider_net_init - init function when the driver is loaded
2262 *
2263 * spider_net_init registers the device driver
2264 */
2265static int __init spider_net_init(void)
2266{
2267 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2268 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2269 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2270 }
2271 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2272 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2273 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2274 }
2275 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2276 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2277 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2278 }
2279 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2280 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2281 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2282 }
2283
2284 return pci_register_driver(&spider_net_driver);
2285}
2286
2287/**
2288 * spider_net_cleanup - exit function when driver is unloaded
2289 *
2290 * spider_net_cleanup unregisters the device driver
2291 */
2292static void __exit spider_net_cleanup(void)
2293{
2294 pci_unregister_driver(&spider_net_driver);
2295}
2296
2297module_init(spider_net_init);
2298module_exit(spider_net_cleanup);
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-24 04:25:35 -0400