blob: 88907218457a639d95a313b580631f8fc7e35b1a [file] [log] [blame]
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001/*
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
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070024#include <linux/compiler.h>
25#include <linux/crc32.h>
26#include <linux/delay.h>
27#include <linux/etherdevice.h>
28#include <linux/ethtool.h>
29#include <linux/firmware.h>
30#include <linux/if_vlan.h>
Arnd Bergmann7c5c2202006-01-12 17:16:45 -050031#include <linux/in.h>
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070032#include <linux/init.h>
33#include <linux/ioport.h>
34#include <linux/ip.h>
35#include <linux/kernel.h>
36#include <linux/mii.h>
37#include <linux/module.h>
38#include <linux/netdevice.h>
39#include <linux/device.h>
40#include <linux/pci.h>
41#include <linux/skbuff.h>
42#include <linux/slab.h>
43#include <linux/tcp.h>
44#include <linux/types.h>
Arnd Bergmann11f1a522006-01-12 17:16:44 -050045#include <linux/vmalloc.h>
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070046#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 */
Jens Osterkampbdd01502006-07-13 11:54:08 +020087static inline u32
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070088spider_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 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200104static inline void
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700105spider_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
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700111/** spider_net_write_phy - write to phy register
112 * @netdev: adapter to be written to
113 * @mii_id: id of MII
114 * @reg: PHY register
115 * @val: value to be written to phy register
116 *
117 * spider_net_write_phy_register writes to an arbitrary PHY
118 * register via the spider GPCWOPCMD register. We assume the queue does
119 * not run full (not more than 15 commands outstanding).
120 **/
121static void
122spider_net_write_phy(struct net_device *netdev, int mii_id,
123 int reg, int val)
124{
125 struct spider_net_card *card = netdev_priv(netdev);
126 u32 writevalue;
127
128 writevalue = ((u32)mii_id << 21) |
129 ((u32)reg << 16) | ((u32)val);
130
131 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
132}
133
134/** spider_net_read_phy - read from phy register
135 * @netdev: network device to be read from
136 * @mii_id: id of MII
137 * @reg: PHY register
138 *
139 * Returns value read from PHY register
140 *
141 * spider_net_write_phy reads from an arbitrary PHY
142 * register via the spider GPCROPCMD register
143 **/
144static int
145spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
146{
147 struct spider_net_card *card = netdev_priv(netdev);
148 u32 readvalue;
149
150 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
151 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
152
153 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
154 * interrupt, as we poll for the completion of the read operation
155 * in spider_net_read_phy. Should take about 50 us */
156 do {
157 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
158 } while (readvalue & SPIDER_NET_GPREXEC);
159
160 readvalue &= SPIDER_NET_GPRDAT_MASK;
161
162 return readvalue;
163}
164
165/**
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500166 * spider_net_rx_irq_off - switch off rx irq on this spider card
167 * @card: device structure
168 *
169 * switches off rx irq by masking them out in the GHIINTnMSK register
170 */
171static void
172spider_net_rx_irq_off(struct spider_net_card *card)
173{
174 u32 regvalue;
175
176 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
177 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
178}
179
180/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700181 * spider_net_rx_irq_on - switch on rx irq on this spider card
182 * @card: device structure
183 *
184 * switches on rx irq by enabling them in the GHIINTnMSK register
185 */
186static void
187spider_net_rx_irq_on(struct spider_net_card *card)
188{
189 u32 regvalue;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700190
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500191 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
192 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700193}
194
195/**
196 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
197 * @card: card structure
198 *
199 * spider_net_set_promisc sets the unicast destination address filter and
200 * thus either allows for non-promisc mode or promisc mode
201 */
202static void
203spider_net_set_promisc(struct spider_net_card *card)
204{
205 u32 macu, macl;
206 struct net_device *netdev = card->netdev;
207
208 if (netdev->flags & IFF_PROMISC) {
209 /* clear destination entry 0 */
210 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
211 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
212 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
213 SPIDER_NET_PROMISC_VALUE);
214 } else {
215 macu = netdev->dev_addr[0];
216 macu <<= 8;
217 macu |= netdev->dev_addr[1];
218 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
219
220 macu |= SPIDER_NET_UA_DESCR_VALUE;
221 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
222 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
223 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
224 SPIDER_NET_NONPROMISC_VALUE);
225 }
226}
227
228/**
229 * spider_net_get_mac_address - read mac address from spider card
230 * @card: device structure
231 *
232 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
233 */
234static int
235spider_net_get_mac_address(struct net_device *netdev)
236{
237 struct spider_net_card *card = netdev_priv(netdev);
238 u32 macl, macu;
239
240 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
241 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
242
243 netdev->dev_addr[0] = (macu >> 24) & 0xff;
244 netdev->dev_addr[1] = (macu >> 16) & 0xff;
245 netdev->dev_addr[2] = (macu >> 8) & 0xff;
246 netdev->dev_addr[3] = macu & 0xff;
247 netdev->dev_addr[4] = (macl >> 8) & 0xff;
248 netdev->dev_addr[5] = macl & 0xff;
249
250 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
251 return -EINVAL;
252
253 return 0;
254}
255
256/**
257 * spider_net_get_descr_status -- returns the status of a descriptor
258 * @descr: descriptor to look at
259 *
260 * returns the status as in the dmac_cmd_status field of the descriptor
261 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200262static inline int
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700263spider_net_get_descr_status(struct spider_net_descr *descr)
264{
Jens Osterkampbdd01502006-07-13 11:54:08 +0200265 return descr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700266}
267
268/**
269 * spider_net_free_chain - free descriptor chain
270 * @card: card structure
271 * @chain: address of chain
272 *
273 */
274static void
275spider_net_free_chain(struct spider_net_card *card,
276 struct spider_net_descr_chain *chain)
277{
278 struct spider_net_descr *descr;
279
280 for (descr = chain->tail; !descr->bus_addr; descr = descr->next) {
281 pci_unmap_single(card->pdev, descr->bus_addr,
282 SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
283 descr->bus_addr = 0;
284 }
285}
286
287/**
288 * spider_net_init_chain - links descriptor chain
289 * @card: card structure
290 * @chain: address of chain
291 * @start_descr: address of descriptor array
292 * @no: number of descriptors
293 *
294 * we manage a circular list that mirrors the hardware structure,
295 * except that the hardware uses bus addresses.
296 *
297 * returns 0 on success, <0 on failure
298 */
299static int
300spider_net_init_chain(struct spider_net_card *card,
301 struct spider_net_descr_chain *chain,
Jens Osterkampbdd01502006-07-13 11:54:08 +0200302 struct spider_net_descr *start_descr,
303 int direction, int no)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700304{
305 int i;
306 struct spider_net_descr *descr;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500307 dma_addr_t buf;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700308
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700309 descr = start_descr;
310 memset(descr, 0, sizeof(*descr) * no);
311
312 /* set up the hardware pointers in each descriptor */
313 for (i=0; i<no; i++, descr++) {
Jens Osterkampbdd01502006-07-13 11:54:08 +0200314 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700315
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500316 buf = pci_map_single(card->pdev, descr,
317 SPIDER_NET_DESCR_SIZE,
Jens Osterkampbdd01502006-07-13 11:54:08 +0200318 direction);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700319
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500320 if (buf == DMA_ERROR_CODE)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700321 goto iommu_error;
322
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500323 descr->bus_addr = buf;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700324 descr->next = descr + 1;
325 descr->prev = descr - 1;
326
327 }
328 /* do actual circular list */
329 (descr-1)->next = start_descr;
330 start_descr->prev = descr-1;
331
332 descr = start_descr;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200333 if (direction == PCI_DMA_FROMDEVICE)
334 for (i=0; i < no; i++, descr++)
335 descr->next_descr_addr = descr->next->bus_addr;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700336
Jens Osterkampbdd01502006-07-13 11:54:08 +0200337 spin_lock_init(&chain->lock);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700338 chain->head = start_descr;
339 chain->tail = start_descr;
340
341 return 0;
342
343iommu_error:
344 descr = start_descr;
345 for (i=0; i < no; i++, descr++)
346 if (descr->bus_addr)
347 pci_unmap_single(card->pdev, descr->bus_addr,
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500348 SPIDER_NET_DESCR_SIZE,
Jens Osterkampbdd01502006-07-13 11:54:08 +0200349 direction);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700350 return -ENOMEM;
351}
352
353/**
354 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
355 * @card: card structure
356 *
357 * returns 0 on success, <0 on failure
358 */
359static void
360spider_net_free_rx_chain_contents(struct spider_net_card *card)
361{
362 struct spider_net_descr *descr;
363
364 descr = card->rx_chain.head;
365 while (descr->next != card->rx_chain.head) {
366 if (descr->skb) {
367 dev_kfree_skb(descr->skb);
368 pci_unmap_single(card->pdev, descr->buf_addr,
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500369 SPIDER_NET_MAX_FRAME,
Jens Osterkampbdd01502006-07-13 11:54:08 +0200370 PCI_DMA_FROMDEVICE);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700371 }
372 descr = descr->next;
373 }
374}
375
376/**
377 * spider_net_prepare_rx_descr - reinitializes a rx descriptor
378 * @card: card structure
379 * @descr: descriptor to re-init
380 *
381 * return 0 on succes, <0 on failure
382 *
383 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
384 * Activate the descriptor state-wise
385 */
386static int
387spider_net_prepare_rx_descr(struct spider_net_card *card,
388 struct spider_net_descr *descr)
389{
Arnd Bergmann8e0a6132006-01-12 17:16:43 -0500390 dma_addr_t buf;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700391 int error = 0;
392 int offset;
393 int bufsize;
394
395 /* we need to round up the buffer size to a multiple of 128 */
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500396 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700397 (~(SPIDER_NET_RXBUF_ALIGN - 1));
398
399 /* and we need to have it 128 byte aligned, therefore we allocate a
400 * bit more */
401 /* allocate an skb */
402 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
403 if (!descr->skb) {
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500404 if (netif_msg_rx_err(card) && net_ratelimit())
405 pr_err("Not enough memory to allocate rx buffer\n");
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700406 return -ENOMEM;
407 }
408 descr->buf_size = bufsize;
409 descr->result_size = 0;
410 descr->valid_size = 0;
411 descr->data_status = 0;
412 descr->data_error = 0;
413
414 offset = ((unsigned long)descr->skb->data) &
415 (SPIDER_NET_RXBUF_ALIGN - 1);
416 if (offset)
417 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
418 /* io-mmu-map the skb */
Arnd Bergmann8e0a6132006-01-12 17:16:43 -0500419 buf = pci_map_single(card->pdev, descr->skb->data,
Jens Osterkampbdd01502006-07-13 11:54:08 +0200420 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
Arnd Bergmann8e0a6132006-01-12 17:16:43 -0500421 descr->buf_addr = buf;
422 if (buf == DMA_ERROR_CODE) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700423 dev_kfree_skb_any(descr->skb);
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500424 if (netif_msg_rx_err(card) && net_ratelimit())
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700425 pr_err("Could not iommu-map rx buffer\n");
Jens Osterkampbdd01502006-07-13 11:54:08 +0200426 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700427 } else {
Jens Osterkampbdd01502006-07-13 11:54:08 +0200428 descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
429 SPIDER_NET_DMAC_NOINTR_COMPLETE;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700430 }
431
432 return error;
433}
434
435/**
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500436 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700437 * @card: card structure
438 *
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500439 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700440 * chip by writing to the appropriate register. DMA is enabled in
441 * spider_net_enable_rxdmac.
442 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200443static inline void
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700444spider_net_enable_rxchtails(struct spider_net_card *card)
445{
446 /* assume chain is aligned correctly */
447 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
448 card->rx_chain.tail->bus_addr);
449}
450
451/**
452 * spider_net_enable_rxdmac - enables a receive DMA controller
453 * @card: card structure
454 *
455 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
456 * in the GDADMACCNTR register
457 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200458static inline void
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700459spider_net_enable_rxdmac(struct spider_net_card *card)
460{
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500461 wmb();
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700462 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
463 SPIDER_NET_DMA_RX_VALUE);
464}
465
466/**
467 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
468 * @card: card structure
469 *
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500470 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700471 */
472static void
473spider_net_refill_rx_chain(struct spider_net_card *card)
474{
Jens Osterkampbdd01502006-07-13 11:54:08 +0200475 struct spider_net_descr_chain *chain = &card->rx_chain;
476 unsigned long flags;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700477
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500478 /* one context doing the refill (and a second context seeing that
479 * and omitting it) is ok. If called by NAPI, we'll be called again
480 * as spider_net_decode_one_descr is called several times. If some
481 * interrupt calls us, the NAPI is about to clean up anyway. */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200482 if (!spin_trylock_irqsave(&chain->lock, flags))
483 return;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700484
Jens Osterkampbdd01502006-07-13 11:54:08 +0200485 while (spider_net_get_descr_status(chain->head) ==
486 SPIDER_NET_DESCR_NOT_IN_USE) {
487 if (spider_net_prepare_rx_descr(card, chain->head))
488 break;
489 chain->head = chain->head->next;
490 }
491
492 spin_unlock_irqrestore(&chain->lock, flags);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700493}
494
495/**
496 * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
497 * @card: card structure
498 *
499 * returns 0 on success, <0 on failure
500 */
501static int
502spider_net_alloc_rx_skbs(struct spider_net_card *card)
503{
504 int result;
505 struct spider_net_descr_chain *chain;
506
507 result = -ENOMEM;
508
509 chain = &card->rx_chain;
510 /* put at least one buffer into the chain. if this fails,
511 * we've got a problem. if not, spider_net_refill_rx_chain
512 * will do the rest at the end of this function */
513 if (spider_net_prepare_rx_descr(card, chain->head))
514 goto error;
515 else
516 chain->head = chain->head->next;
517
518 /* this will allocate the rest of the rx buffers; if not, it's
519 * business as usual later on */
520 spider_net_refill_rx_chain(card);
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500521 spider_net_enable_rxdmac(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700522 return 0;
523
524error:
525 spider_net_free_rx_chain_contents(card);
526 return result;
527}
528
529/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700530 * spider_net_get_multicast_hash - generates hash for multicast filter table
531 * @addr: multicast address
532 *
533 * returns the hash value.
534 *
535 * spider_net_get_multicast_hash calculates a hash value for a given multicast
536 * address, that is used to set the multicast filter tables
537 */
538static u8
539spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
540{
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700541 u32 crc;
542 u8 hash;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500543 char addr_for_crc[ETH_ALEN] = { 0, };
544 int i, bit;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700545
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500546 for (i = 0; i < ETH_ALEN * 8; i++) {
547 bit = (addr[i / 8] >> (i % 8)) & 1;
548 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
549 }
550
551 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700552
553 hash = (crc >> 27);
554 hash <<= 3;
555 hash |= crc & 7;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500556 hash &= 0xff;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700557
558 return hash;
559}
560
561/**
562 * spider_net_set_multi - sets multicast addresses and promisc flags
563 * @netdev: interface device structure
564 *
565 * spider_net_set_multi configures multicast addresses as needed for the
566 * netdev interface. It also sets up multicast, allmulti and promisc
567 * flags appropriately
568 */
569static void
570spider_net_set_multi(struct net_device *netdev)
571{
572 struct dev_mc_list *mc;
573 u8 hash;
574 int i;
575 u32 reg;
576 struct spider_net_card *card = netdev_priv(netdev);
577 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
578 {0, };
579
580 spider_net_set_promisc(card);
581
582 if (netdev->flags & IFF_ALLMULTI) {
583 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
584 set_bit(i, bitmask);
585 }
586 goto write_hash;
587 }
588
589 /* well, we know, what the broadcast hash value is: it's xfd
590 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
591 set_bit(0xfd, bitmask);
592
593 for (mc = netdev->mc_list; mc; mc = mc->next) {
594 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
595 set_bit(hash, bitmask);
596 }
597
598write_hash:
599 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
600 reg = 0;
601 if (test_bit(i * 4, bitmask))
602 reg += 0x08;
603 reg <<= 8;
604 if (test_bit(i * 4 + 1, bitmask))
605 reg += 0x08;
606 reg <<= 8;
607 if (test_bit(i * 4 + 2, bitmask))
608 reg += 0x08;
609 reg <<= 8;
610 if (test_bit(i * 4 + 3, bitmask))
611 reg += 0x08;
612
613 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
614 }
615}
616
617/**
618 * spider_net_disable_rxdmac - disables the receive DMA controller
619 * @card: card structure
620 *
621 * spider_net_disable_rxdmac terminates processing on the DMA controller by
622 * turing off DMA and issueing a force end
623 */
624static void
625spider_net_disable_rxdmac(struct spider_net_card *card)
626{
627 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
628 SPIDER_NET_DMA_RX_FEND_VALUE);
629}
630
631/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700632 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
633 * @card: card structure
634 * @descr: descriptor structure to fill out
635 * @skb: packet to use
636 *
637 * returns 0 on success, <0 on failure.
638 *
639 * fills out the descriptor structure with skb data and len. Copies data,
640 * if needed (32bit DMA!)
641 */
642static int
643spider_net_prepare_tx_descr(struct spider_net_card *card,
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700644 struct sk_buff *skb)
645{
Jens Osterkampbdd01502006-07-13 11:54:08 +0200646 struct spider_net_descr *descr = card->tx_chain.head;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500647 dma_addr_t buf;
648
Jens Osterkampbdd01502006-07-13 11:54:08 +0200649 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
Arnd Bergmann8e0a6132006-01-12 17:16:43 -0500650 if (buf == DMA_ERROR_CODE) {
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500651 if (netif_msg_tx_err(card) && net_ratelimit())
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700652 pr_err("could not iommu-map packet (%p, %i). "
653 "Dropping packet\n", skb->data, skb->len);
654 return -ENOMEM;
655 }
656
Arnd Bergmann8e0a6132006-01-12 17:16:43 -0500657 descr->buf_addr = buf;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700658 descr->buf_size = skb->len;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200659 descr->next_descr_addr = 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700660 descr->skb = skb;
661 descr->data_status = 0;
662
Jens Osterkampbdd01502006-07-13 11:54:08 +0200663 descr->dmac_cmd_status =
664 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
665 if (skb->protocol == htons(ETH_P_IP))
666 switch (skb->nh.iph->protocol) {
667 case IPPROTO_TCP:
668 descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
669 break;
670 case IPPROTO_UDP:
671 descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
672 break;
673 }
674
675 descr->prev->next_descr_addr = descr->bus_addr;
676
677 return 0;
678}
679
680/**
681 * spider_net_release_tx_descr - processes a used tx descriptor
682 * @card: card structure
683 * @descr: descriptor to release
684 *
685 * releases a used tx descriptor (unmapping, freeing of skb)
686 */
687static inline void
688spider_net_release_tx_descr(struct spider_net_card *card)
689{
690 struct spider_net_descr *descr = card->tx_chain.tail;
691 struct sk_buff *skb;
692
693 card->tx_chain.tail = card->tx_chain.tail->next;
694 descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
695
696 /* unmap the skb */
697 skb = descr->skb;
698 pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
699 PCI_DMA_TODEVICE);
700 dev_kfree_skb_any(skb);
701}
702
703/**
704 * spider_net_release_tx_chain - processes sent tx descriptors
705 * @card: adapter structure
706 * @brutal: if set, don't care about whether descriptor seems to be in use
707 *
708 * returns 0 if the tx ring is empty, otherwise 1.
709 *
710 * spider_net_release_tx_chain releases the tx descriptors that spider has
711 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
712 * If some other context is calling this function, we return 1 so that we're
713 * scheduled again (if we were scheduled) and will not loose initiative.
714 */
715static int
716spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
717{
718 struct spider_net_descr_chain *chain = &card->tx_chain;
719 int status;
720
721 spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR);
722
723 while (chain->tail != chain->head) {
724 status = spider_net_get_descr_status(chain->tail);
725 switch (status) {
726 case SPIDER_NET_DESCR_COMPLETE:
727 card->netdev_stats.tx_packets++;
728 card->netdev_stats.tx_bytes += chain->tail->skb->len;
729 break;
730
731 case SPIDER_NET_DESCR_CARDOWNED:
732 if (!brutal)
733 return 1;
734 /* fallthrough, if we release the descriptors
735 * brutally (then we don't care about
736 * SPIDER_NET_DESCR_CARDOWNED) */
737
738 case SPIDER_NET_DESCR_RESPONSE_ERROR:
739 case SPIDER_NET_DESCR_PROTECTION_ERROR:
740 case SPIDER_NET_DESCR_FORCE_END:
741 if (netif_msg_tx_err(card))
742 pr_err("%s: forcing end of tx descriptor "
743 "with status x%02x\n",
744 card->netdev->name, status);
745 card->netdev_stats.tx_errors++;
746 break;
747
748 default:
749 card->netdev_stats.tx_dropped++;
750 return 1;
751 }
752 spider_net_release_tx_descr(card);
753 }
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700754
755 return 0;
756}
757
758/**
759 * spider_net_kick_tx_dma - enables TX DMA processing
760 * @card: card structure
761 * @descr: descriptor address to enable TX processing at
762 *
763 * spider_net_kick_tx_dma writes the current tx chain head as start address
764 * of the tx descriptor chain and enables the transmission DMA engine
765 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200766static inline void
767spider_net_kick_tx_dma(struct spider_net_card *card)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700768{
Jens Osterkampbdd01502006-07-13 11:54:08 +0200769 struct spider_net_descr *descr;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700770
Jens Osterkampbdd01502006-07-13 11:54:08 +0200771 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
772 SPIDER_NET_TX_DMA_EN)
773 goto out;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700774
Jens Osterkampbdd01502006-07-13 11:54:08 +0200775 descr = card->tx_chain.tail;
776 for (;;) {
777 if (spider_net_get_descr_status(descr) ==
778 SPIDER_NET_DESCR_CARDOWNED) {
779 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
780 descr->bus_addr);
781 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
782 SPIDER_NET_DMA_TX_VALUE);
783 break;
784 }
785 if (descr == card->tx_chain.head)
786 break;
787 descr = descr->next;
788 }
789
790out:
791 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700792}
793
794/**
795 * spider_net_xmit - transmits a frame over the device
796 * @skb: packet to send out
797 * @netdev: interface device structure
798 *
Jens Osterkampbdd01502006-07-13 11:54:08 +0200799 * returns 0 on success, !0 on failure
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700800 */
801static int
802spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
803{
804 struct spider_net_card *card = netdev_priv(netdev);
Jens Osterkampbdd01502006-07-13 11:54:08 +0200805 struct spider_net_descr_chain *chain = &card->tx_chain;
806 struct spider_net_descr *descr = chain->head;
807 unsigned long flags;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700808 int result;
809
Jens Osterkampbdd01502006-07-13 11:54:08 +0200810 spin_lock_irqsave(&chain->lock, flags);
811
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500812 spider_net_release_tx_chain(card, 0);
813
Jens Osterkampbdd01502006-07-13 11:54:08 +0200814 if (chain->head->next == chain->tail->prev) {
815 card->netdev_stats.tx_dropped++;
816 result = NETDEV_TX_LOCKED;
817 goto out;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500818 }
819
Jens Osterkampbdd01502006-07-13 11:54:08 +0200820 if (spider_net_get_descr_status(descr) != SPIDER_NET_DESCR_NOT_IN_USE) {
821 result = NETDEV_TX_LOCKED;
822 goto out;
823 }
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700824
Jens Osterkampbdd01502006-07-13 11:54:08 +0200825 if (spider_net_prepare_tx_descr(card, skb) != 0) {
826 card->netdev_stats.tx_dropped++;
827 result = NETDEV_TX_BUSY;
828 goto out;
829 }
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700830
Jens Osterkampbdd01502006-07-13 11:54:08 +0200831 result = NETDEV_TX_OK;
832
833 spider_net_kick_tx_dma(card);
834 card->tx_chain.head = card->tx_chain.head->next;
835
836out:
837 spin_unlock_irqrestore(&chain->lock, flags);
838 netif_wake_queue(netdev);
839 return result;
840}
841
842/**
843 * spider_net_cleanup_tx_ring - cleans up the TX ring
844 * @card: card structure
845 *
846 * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
847 * interrupts to cleanup our TX ring) and returns sent packets to the stack
848 * by freeing them
849 */
850static void
851spider_net_cleanup_tx_ring(struct spider_net_card *card)
852{
853 unsigned long flags;
854
855 spin_lock_irqsave(&card->tx_chain.lock, flags);
856
857 if ((spider_net_release_tx_chain(card, 0) != 0) &&
858 (card->netdev->flags & IFF_UP))
859 spider_net_kick_tx_dma(card);
860
861 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700862}
863
864/**
865 * spider_net_do_ioctl - called for device ioctls
866 * @netdev: interface device structure
867 * @ifr: request parameter structure for ioctl
868 * @cmd: command code for ioctl
869 *
870 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
871 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
872 */
873static int
874spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
875{
876 switch (cmd) {
877 default:
878 return -EOPNOTSUPP;
879 }
880}
881
882/**
883 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
884 * @descr: descriptor to process
885 * @card: card structure
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500886 * @napi: whether caller is in NAPI context
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700887 *
888 * returns 1 on success, 0 if no packet was passed to the stack
889 *
890 * iommu-unmaps the skb, fills out skb structure and passes the data to the
891 * stack. The descriptor state is not changed.
892 */
893static int
894spider_net_pass_skb_up(struct spider_net_descr *descr,
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500895 struct spider_net_card *card, int napi)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700896{
897 struct sk_buff *skb;
898 struct net_device *netdev;
899 u32 data_status, data_error;
900
901 data_status = descr->data_status;
902 data_error = descr->data_error;
903
904 netdev = card->netdev;
905
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500906 /* unmap descriptor */
907 pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
Jens Osterkampbdd01502006-07-13 11:54:08 +0200908 PCI_DMA_FROMDEVICE);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700909
910 /* the cases we'll throw away the packet immediately */
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500911 if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
912 if (netif_msg_rx_err(card))
913 pr_err("error in received descriptor found, "
914 "data_status=x%08x, data_error=x%08x\n",
915 data_status, data_error);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700916 return 0;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500917 }
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700918
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500919 skb = descr->skb;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700920 skb->dev = netdev;
921 skb_put(skb, descr->valid_size);
922
923 /* the card seems to add 2 bytes of junk in front
924 * of the ethernet frame */
925#define SPIDER_MISALIGN 2
926 skb_pull(skb, SPIDER_MISALIGN);
927 skb->protocol = eth_type_trans(skb, netdev);
928
929 /* checksum offload */
930 if (card->options.rx_csum) {
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500931 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
932 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
933 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700934 skb->ip_summed = CHECKSUM_UNNECESSARY;
935 else
936 skb->ip_summed = CHECKSUM_NONE;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500937 } else
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700938 skb->ip_summed = CHECKSUM_NONE;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700939
940 if (data_status & SPIDER_NET_VLAN_PACKET) {
941 /* further enhancements: HW-accel VLAN
942 * vlan_hwaccel_receive_skb
943 */
944 }
945
946 /* pass skb up to stack */
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500947 if (napi)
948 netif_receive_skb(skb);
949 else
950 netif_rx_ni(skb);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700951
952 /* update netdevice statistics */
953 card->netdev_stats.rx_packets++;
954 card->netdev_stats.rx_bytes += skb->len;
955
956 return 1;
957}
958
959/**
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500960 * spider_net_decode_one_descr - processes an rx descriptor
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700961 * @card: card structure
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500962 * @napi: whether caller is in NAPI context
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700963 *
964 * returns 1 if a packet has been sent to the stack, otherwise 0
965 *
966 * processes an rx descriptor by iommu-unmapping the data buffer and passing
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500967 * the packet up to the stack. This function is called in softirq
968 * context, e.g. either bottom half from interrupt or NAPI polling context
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700969 */
970static int
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500971spider_net_decode_one_descr(struct spider_net_card *card, int napi)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700972{
Jens Osterkampbdd01502006-07-13 11:54:08 +0200973 struct spider_net_descr_chain *chain = &card->rx_chain;
974 struct spider_net_descr *descr = chain->tail;
975 int status;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700976 int result;
977
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700978 status = spider_net_get_descr_status(descr);
979
980 if (status == SPIDER_NET_DESCR_CARDOWNED) {
981 /* nothing in the descriptor yet */
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500982 result=0;
983 goto out;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700984 }
985
986 if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500987 /* not initialized yet, the ring must be empty */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700988 spider_net_refill_rx_chain(card);
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500989 spider_net_enable_rxdmac(card);
990 result=0;
991 goto out;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700992 }
993
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500994 /* descriptor definitively used -- move on tail */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700995 chain->tail = descr->next;
996
997 result = 0;
998 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
999 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1000 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1001 if (netif_msg_rx_err(card))
1002 pr_err("%s: dropping RX descriptor with state %d\n",
1003 card->netdev->name, status);
1004 card->netdev_stats.rx_dropped++;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001005 pci_unmap_single(card->pdev, descr->buf_addr,
Jens Osterkampbdd01502006-07-13 11:54:08 +02001006 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001007 dev_kfree_skb_irq(descr->skb);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001008 goto refill;
1009 }
1010
1011 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1012 (status != SPIDER_NET_DESCR_FRAME_END) ) {
1013 if (netif_msg_rx_err(card))
1014 pr_err("%s: RX descriptor with state %d\n",
1015 card->netdev->name, status);
1016 goto refill;
1017 }
1018
1019 /* ok, we've got a packet in descr */
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001020 result = spider_net_pass_skb_up(descr, card, napi);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001021refill:
Jens Osterkampbdd01502006-07-13 11:54:08 +02001022 descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001023 /* change the descriptor state: */
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001024 if (!napi)
1025 spider_net_refill_rx_chain(card);
1026out:
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001027 return result;
1028}
1029
1030/**
1031 * spider_net_poll - NAPI poll function called by the stack to return packets
1032 * @netdev: interface device structure
1033 * @budget: number of packets we can pass to the stack at most
1034 *
1035 * returns 0 if no more packets available to the driver/stack. Returns 1,
1036 * if the quota is exceeded, but the driver has still packets.
1037 *
1038 * spider_net_poll returns all packets from the rx descriptors to the stack
1039 * (using netif_receive_skb). If all/enough packets are up, the driver
1040 * reenables interrupts and returns 0. If not, 1 is returned.
1041 */
1042static int
1043spider_net_poll(struct net_device *netdev, int *budget)
1044{
1045 struct spider_net_card *card = netdev_priv(netdev);
1046 int packets_to_do, packets_done = 0;
1047 int no_more_packets = 0;
1048
1049 packets_to_do = min(*budget, netdev->quota);
1050
1051 while (packets_to_do) {
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001052 if (spider_net_decode_one_descr(card, 1)) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001053 packets_done++;
1054 packets_to_do--;
1055 } else {
1056 /* no more packets for the stack */
1057 no_more_packets = 1;
1058 break;
1059 }
1060 }
1061
1062 netdev->quota -= packets_done;
1063 *budget -= packets_done;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001064 spider_net_refill_rx_chain(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001065
1066 /* if all packets are in the stack, enable interrupts and return 0 */
1067 /* if not, return 1 */
1068 if (no_more_packets) {
1069 netif_rx_complete(netdev);
1070 spider_net_rx_irq_on(card);
1071 return 0;
1072 }
1073
1074 return 1;
1075}
1076
1077/**
1078 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1079 * @netdev: interface device structure
1080 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1081 */
1082static void
1083spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1084{
1085 /* further enhancement... yet to do */
1086 return;
1087}
1088
1089/**
1090 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1091 * @netdev: interface device structure
1092 * @vid: VLAN id to add
1093 */
1094static void
1095spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1096{
1097 /* further enhancement... yet to do */
1098 /* add vid to card's VLAN filter table */
1099 return;
1100}
1101
1102/**
1103 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1104 * @netdev: interface device structure
1105 * @vid: VLAN id to remove
1106 */
1107static void
1108spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1109{
1110 /* further enhancement... yet to do */
1111 /* remove vid from card's VLAN filter table */
1112}
1113
1114/**
1115 * spider_net_get_stats - get interface statistics
1116 * @netdev: interface device structure
1117 *
1118 * returns the interface statistics residing in the spider_net_card struct
1119 */
1120static struct net_device_stats *
1121spider_net_get_stats(struct net_device *netdev)
1122{
1123 struct spider_net_card *card = netdev_priv(netdev);
1124 struct net_device_stats *stats = &card->netdev_stats;
1125 return stats;
1126}
1127
1128/**
1129 * spider_net_change_mtu - changes the MTU of an interface
1130 * @netdev: interface device structure
1131 * @new_mtu: new MTU value
1132 *
1133 * returns 0 on success, <0 on failure
1134 */
1135static int
1136spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1137{
1138 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1139 * and mtu is outbound only anyway */
1140 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1141 (new_mtu > SPIDER_NET_MAX_MTU) )
1142 return -EINVAL;
1143 netdev->mtu = new_mtu;
1144 return 0;
1145}
1146
1147/**
1148 * spider_net_set_mac - sets the MAC of an interface
1149 * @netdev: interface device structure
1150 * @ptr: pointer to new MAC address
1151 *
1152 * Returns 0 on success, <0 on failure. Currently, we don't support this
1153 * and will always return EOPNOTSUPP.
1154 */
1155static int
1156spider_net_set_mac(struct net_device *netdev, void *p)
1157{
1158 struct spider_net_card *card = netdev_priv(netdev);
Jens Osterkamp054034d2005-09-06 19:30:55 -07001159 u32 macl, macu, regvalue;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001160 struct sockaddr *addr = p;
1161
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001162 if (!is_valid_ether_addr(addr->sa_data))
1163 return -EADDRNOTAVAIL;
1164
Jens Osterkamp054034d2005-09-06 19:30:55 -07001165 /* switch off GMACTPE and GMACRPE */
1166 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1167 regvalue &= ~((1 << 5) | (1 << 6));
1168 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1169
1170 /* write mac */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001171 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1172 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1173 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1174 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1175 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1176
Jens Osterkamp054034d2005-09-06 19:30:55 -07001177 /* switch GMACTPE and GMACRPE back on */
1178 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1179 regvalue |= ((1 << 5) | (1 << 6));
1180 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1181
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001182 spider_net_set_promisc(card);
1183
1184 /* look up, whether we have been successful */
1185 if (spider_net_get_mac_address(netdev))
1186 return -EADDRNOTAVAIL;
1187 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1188 return -EADDRNOTAVAIL;
1189
1190 return 0;
1191}
1192
1193/**
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001194 * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
1195 * @card: card structure
1196 *
1197 * spider_net_handle_rxram_full empties the RX ring so that spider can put
1198 * more packets in it and empty its RX RAM. This is called in bottom half
1199 * context
1200 */
1201static void
1202spider_net_handle_rxram_full(struct spider_net_card *card)
1203{
1204 while (spider_net_decode_one_descr(card, 0))
1205 ;
1206 spider_net_enable_rxchtails(card);
1207 spider_net_enable_rxdmac(card);
1208 netif_rx_schedule(card->netdev);
1209}
1210
1211/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001212 * spider_net_handle_error_irq - handles errors raised by an interrupt
1213 * @card: card structure
1214 * @status_reg: interrupt status register 0 (GHIINT0STS)
1215 *
1216 * spider_net_handle_error_irq treats or ignores all error conditions
1217 * found when an interrupt is presented
1218 */
1219static void
1220spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1221{
1222 u32 error_reg1, error_reg2;
1223 u32 i;
1224 int show_error = 1;
1225
1226 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1227 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1228
1229 /* check GHIINT0STS ************************************/
1230 if (status_reg)
1231 for (i = 0; i < 32; i++)
1232 if (status_reg & (1<<i))
1233 switch (i)
1234 {
1235 /* let error_reg1 and error_reg2 evaluation decide, what to do
1236 case SPIDER_NET_PHYINT:
1237 case SPIDER_NET_GMAC2INT:
1238 case SPIDER_NET_GMAC1INT:
1239 case SPIDER_NET_GIPSINT:
1240 case SPIDER_NET_GFIFOINT:
1241 case SPIDER_NET_DMACINT:
1242 case SPIDER_NET_GSYSINT:
1243 break; */
1244
1245 case SPIDER_NET_GPWOPCMPINT:
1246 /* PHY write operation completed */
1247 show_error = 0;
1248 break;
1249 case SPIDER_NET_GPROPCMPINT:
1250 /* PHY read operation completed */
1251 /* we don't use semaphores, as we poll for the completion
1252 * of the read operation in spider_net_read_phy. Should take
1253 * about 50 us */
1254 show_error = 0;
1255 break;
1256 case SPIDER_NET_GPWFFINT:
1257 /* PHY command queue full */
1258 if (netif_msg_intr(card))
1259 pr_err("PHY write queue full\n");
1260 show_error = 0;
1261 break;
1262
1263 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1264 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1265 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1266
1267 case SPIDER_NET_GDTDEN0INT:
1268 /* someone has set TX_DMA_EN to 0 */
1269 show_error = 0;
1270 break;
1271
1272 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1273 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1274 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1275 case SPIDER_NET_GDADEN0INT:
1276 /* someone has set RX_DMA_EN to 0 */
1277 show_error = 0;
1278 break;
1279
1280 /* RX interrupts */
1281 case SPIDER_NET_GDDFDCINT:
1282 case SPIDER_NET_GDCFDCINT:
1283 case SPIDER_NET_GDBFDCINT:
1284 case SPIDER_NET_GDAFDCINT:
1285 /* case SPIDER_NET_GDNMINT: not used. print a message */
1286 /* case SPIDER_NET_GCNMINT: not used. print a message */
1287 /* case SPIDER_NET_GBNMINT: not used. print a message */
1288 /* case SPIDER_NET_GANMINT: not used. print a message */
1289 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1290 show_error = 0;
1291 break;
1292
1293 /* TX interrupts */
1294 case SPIDER_NET_GDTFDCINT:
1295 show_error = 0;
1296 break;
1297 case SPIDER_NET_GTTEDINT:
1298 show_error = 0;
1299 break;
1300 case SPIDER_NET_GDTDCEINT:
1301 /* chain end. If a descriptor should be sent, kick off
1302 * tx dma
1303 if (card->tx_chain.tail == card->tx_chain.head)
1304 spider_net_kick_tx_dma(card);
1305 show_error = 0; */
1306 break;
1307
1308 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1309 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1310 }
1311
1312 /* check GHIINT1STS ************************************/
1313 if (error_reg1)
1314 for (i = 0; i < 32; i++)
1315 if (error_reg1 & (1<<i))
1316 switch (i)
1317 {
1318 case SPIDER_NET_GTMFLLINT:
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001319 if (netif_msg_intr(card) && net_ratelimit())
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001320 pr_err("Spider TX RAM full\n");
1321 show_error = 0;
1322 break;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001323 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1324 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1325 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1326 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001327 case SPIDER_NET_GRMFLLINT:
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001328 if (netif_msg_intr(card) && net_ratelimit())
Jens Osterkamp4e5077b2006-03-28 15:59:55 +02001329 pr_debug("Spider RX RAM full, incoming packets "
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001330 "might be discarded!\n");
1331 spider_net_rx_irq_off(card);
1332 tasklet_schedule(&card->rxram_full_tl);
1333 show_error = 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001334 break;
1335
1336 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1337 case SPIDER_NET_GDTINVDINT:
1338 /* allrighty. tx from previous descr ok */
1339 show_error = 0;
1340 break;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001341
1342 /* chain end */
1343 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1344 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1345 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1346 case SPIDER_NET_GDADCEINT:
1347 if (netif_msg_intr(card))
1348 pr_err("got descriptor chain end interrupt, "
1349 "restarting DMAC %c.\n",
1350 'D'+i-SPIDER_NET_GDDDCEINT);
1351 spider_net_refill_rx_chain(card);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001352 spider_net_enable_rxdmac(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001353 show_error = 0;
1354 break;
1355
1356 /* invalid descriptor */
1357 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1358 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1359 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1360 case SPIDER_NET_GDAINVDINT:
1361 /* could happen when rx chain is full */
1362 spider_net_refill_rx_chain(card);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001363 spider_net_enable_rxdmac(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001364 show_error = 0;
1365 break;
1366
1367 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1368 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1369 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1370 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1371 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1372 /* case SPIDER_NET_GDSERINT: problem, print a message */
1373 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1374 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1375 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1376 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1377 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1378 default:
1379 show_error = 1;
1380 break;
1381 }
1382
1383 /* check GHIINT2STS ************************************/
1384 if (error_reg2)
1385 for (i = 0; i < 32; i++)
1386 if (error_reg2 & (1<<i))
1387 switch (i)
1388 {
1389 /* there is nothing we can (want to) do at this time. Log a
1390 * message, we can switch on and off the specific values later on
1391 case SPIDER_NET_GPROPERINT:
1392 case SPIDER_NET_GMCTCRSNGINT:
1393 case SPIDER_NET_GMCTLCOLINT:
1394 case SPIDER_NET_GMCTTMOTINT:
1395 case SPIDER_NET_GMCRCAERINT:
1396 case SPIDER_NET_GMCRCALERINT:
1397 case SPIDER_NET_GMCRALNERINT:
1398 case SPIDER_NET_GMCROVRINT:
1399 case SPIDER_NET_GMCRRNTINT:
1400 case SPIDER_NET_GMCRRXERINT:
1401 case SPIDER_NET_GTITCSERINT:
1402 case SPIDER_NET_GTIFMTERINT:
1403 case SPIDER_NET_GTIPKTRVKINT:
1404 case SPIDER_NET_GTISPINGINT:
1405 case SPIDER_NET_GTISADNGINT:
1406 case SPIDER_NET_GTISPDNGINT:
1407 case SPIDER_NET_GRIFMTERINT:
1408 case SPIDER_NET_GRIPKTRVKINT:
1409 case SPIDER_NET_GRISPINGINT:
1410 case SPIDER_NET_GRISADNGINT:
1411 case SPIDER_NET_GRISPDNGINT:
1412 break;
1413 */
1414 default:
1415 break;
1416 }
1417
1418 if ((show_error) && (netif_msg_intr(card)))
1419 pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
1420 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
1421 status_reg, error_reg1, error_reg2);
1422
1423 /* clear interrupt sources */
1424 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1425 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1426}
1427
1428/**
1429 * spider_net_interrupt - interrupt handler for spider_net
1430 * @irq: interupt number
1431 * @ptr: pointer to net_device
1432 * @regs: PU registers
1433 *
1434 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1435 * interrupt found raised by card.
1436 *
1437 * This is the interrupt handler, that turns off
1438 * interrupts for this device and makes the stack poll the driver
1439 */
1440static irqreturn_t
1441spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs)
1442{
1443 struct net_device *netdev = ptr;
1444 struct spider_net_card *card = netdev_priv(netdev);
1445 u32 status_reg;
1446
1447 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1448
1449 if (!status_reg)
1450 return IRQ_NONE;
1451
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001452 if (status_reg & SPIDER_NET_RXINT ) {
1453 spider_net_rx_irq_off(card);
1454 netif_rx_schedule(netdev);
1455 }
1456
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001457 if (status_reg & SPIDER_NET_ERRINT )
1458 spider_net_handle_error_irq(card, status_reg);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001459
1460 /* clear interrupt sources */
1461 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1462
1463 return IRQ_HANDLED;
1464}
1465
1466#ifdef CONFIG_NET_POLL_CONTROLLER
1467/**
1468 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1469 * @netdev: interface device structure
1470 *
1471 * see Documentation/networking/netconsole.txt
1472 */
1473static void
1474spider_net_poll_controller(struct net_device *netdev)
1475{
1476 disable_irq(netdev->irq);
1477 spider_net_interrupt(netdev->irq, netdev, NULL);
1478 enable_irq(netdev->irq);
1479}
1480#endif /* CONFIG_NET_POLL_CONTROLLER */
1481
1482/**
1483 * spider_net_init_card - initializes the card
1484 * @card: card structure
1485 *
1486 * spider_net_init_card initializes the card so that other registers can
1487 * be used
1488 */
1489static void
1490spider_net_init_card(struct spider_net_card *card)
1491{
1492 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1493 SPIDER_NET_CKRCTRL_STOP_VALUE);
1494
1495 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1496 SPIDER_NET_CKRCTRL_RUN_VALUE);
1497}
1498
1499/**
1500 * spider_net_enable_card - enables the card by setting all kinds of regs
1501 * @card: card structure
1502 *
1503 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1504 */
1505static void
1506spider_net_enable_card(struct spider_net_card *card)
1507{
1508 int i;
1509 /* the following array consists of (register),(value) pairs
1510 * that are set in this function. A register of 0 ends the list */
1511 u32 regs[][2] = {
1512 { SPIDER_NET_GRESUMINTNUM, 0 },
1513 { SPIDER_NET_GREINTNUM, 0 },
1514
1515 /* set interrupt frame number registers */
1516 /* clear the single DMA engine registers first */
1517 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1518 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1519 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1520 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1521 /* then set, what we really need */
1522 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1523
1524 /* timer counter registers and stuff */
1525 { SPIDER_NET_GFREECNNUM, 0 },
1526 { SPIDER_NET_GONETIMENUM, 0 },
1527 { SPIDER_NET_GTOUTFRMNUM, 0 },
1528
1529 /* RX mode setting */
1530 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1531 /* TX mode setting */
1532 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1533 /* IPSEC mode setting */
1534 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1535
1536 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1537
1538 { SPIDER_NET_GMRWOLCTRL, 0 },
Jens Osterkampb636d172006-05-04 05:59:56 -04001539 { SPIDER_NET_GTESTMD, 0x10000000 },
1540 { SPIDER_NET_GTTQMSK, 0x00400040 },
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001541
1542 { SPIDER_NET_GMACINTEN, 0 },
1543
1544 /* flow control stuff */
1545 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1546 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1547
1548 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1549 { 0, 0}
1550 };
1551
1552 i = 0;
1553 while (regs[i][0]) {
1554 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1555 i++;
1556 }
1557
1558 /* clear unicast filter table entries 1 to 14 */
1559 for (i = 1; i <= 14; i++) {
1560 spider_net_write_reg(card,
1561 SPIDER_NET_GMRUAFILnR + i * 8,
1562 0x00080000);
1563 spider_net_write_reg(card,
1564 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1565 0x00000000);
1566 }
1567
1568 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1569
1570 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1571
1572 /* set chain tail adress for RX chains and
1573 * enable DMA */
1574 spider_net_enable_rxchtails(card);
1575 spider_net_enable_rxdmac(card);
1576
1577 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1578
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001579 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1580 SPIDER_NET_LENLMT_VALUE);
1581 spider_net_write_reg(card, SPIDER_NET_GMACMODE,
1582 SPIDER_NET_MACMODE_VALUE);
1583 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1584 SPIDER_NET_OPMODE_VALUE);
1585
1586 /* set interrupt mask registers */
1587 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1588 SPIDER_NET_INT0_MASK_VALUE);
1589 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1590 SPIDER_NET_INT1_MASK_VALUE);
1591 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1592 SPIDER_NET_INT2_MASK_VALUE);
Jens Osterkampbdd01502006-07-13 11:54:08 +02001593
1594 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1595 SPIDER_NET_GDTDCEIDIS);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001596}
1597
1598/**
1599 * spider_net_open - called upon ifonfig up
1600 * @netdev: interface device structure
1601 *
1602 * returns 0 on success, <0 on failure
1603 *
1604 * spider_net_open allocates all the descriptors and memory needed for
1605 * operation, sets up multicast list and enables interrupts
1606 */
1607int
1608spider_net_open(struct net_device *netdev)
1609{
1610 struct spider_net_card *card = netdev_priv(netdev);
1611 int result;
1612
1613 result = -ENOMEM;
Jim Lewisb68a60e2006-08-14 23:00:23 -07001614 if (spider_net_init_chain(card, &card->tx_chain, card->descr,
1615 PCI_DMA_TODEVICE, card->tx_desc))
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001616 goto alloc_tx_failed;
1617 if (spider_net_init_chain(card, &card->rx_chain,
Jim Lewisb68a60e2006-08-14 23:00:23 -07001618 card->descr + card->rx_desc,
1619 PCI_DMA_FROMDEVICE, card->rx_desc))
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001620 goto alloc_rx_failed;
1621
1622 /* allocate rx skbs */
1623 if (spider_net_alloc_rx_skbs(card))
1624 goto alloc_skbs_failed;
1625
1626 spider_net_set_multi(netdev);
1627
1628 /* further enhancement: setup hw vlan, if needed */
1629
1630 result = -EBUSY;
1631 if (request_irq(netdev->irq, spider_net_interrupt,
Thomas Gleixner1fb9df52006-07-01 19:29:39 -07001632 IRQF_SHARED, netdev->name, netdev))
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001633 goto register_int_failed;
1634
1635 spider_net_enable_card(card);
1636
Jens Osterkamp543cec52005-09-06 19:30:54 -07001637 netif_start_queue(netdev);
1638 netif_carrier_on(netdev);
1639 netif_poll_enable(netdev);
1640
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001641 return 0;
1642
1643register_int_failed:
1644 spider_net_free_rx_chain_contents(card);
1645alloc_skbs_failed:
1646 spider_net_free_chain(card, &card->rx_chain);
1647alloc_rx_failed:
1648 spider_net_free_chain(card, &card->tx_chain);
1649alloc_tx_failed:
1650 return result;
1651}
1652
1653/**
1654 * spider_net_setup_phy - setup PHY
1655 * @card: card structure
1656 *
1657 * returns 0 on success, <0 on failure
1658 *
1659 * spider_net_setup_phy is used as part of spider_net_probe. Sets
1660 * the PHY to 1000 Mbps
1661 **/
1662static int
1663spider_net_setup_phy(struct spider_net_card *card)
1664{
1665 struct mii_phy *phy = &card->phy;
1666
1667 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
1668 SPIDER_NET_DMASEL_VALUE);
1669 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
1670 SPIDER_NET_PHY_CTRL_VALUE);
1671 phy->mii_id = 1;
1672 phy->dev = card->netdev;
1673 phy->mdio_read = spider_net_read_phy;
1674 phy->mdio_write = spider_net_write_phy;
1675
1676 mii_phy_probe(phy, phy->mii_id);
1677
1678 if (phy->def->ops->setup_forced)
1679 phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
1680
Jens Osterkamp8ec93452006-05-04 05:59:41 -04001681 phy->def->ops->enable_fiber(phy);
Jens Osterkamp53abbf72005-09-16 08:55:33 +02001682
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001683 phy->def->ops->read_link(phy);
1684 pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
1685 phy->speed, phy->duplex==1 ? "Full" : "Half");
1686
1687 return 0;
1688}
1689
1690/**
1691 * spider_net_download_firmware - loads firmware into the adapter
1692 * @card: card structure
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001693 * @firmware_ptr: pointer to firmware data
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001694 *
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001695 * spider_net_download_firmware loads the firmware data into the
1696 * adapter. It assumes the length etc. to be allright.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001697 */
Arnd Bergmann0d3ea162006-01-12 17:16:41 -05001698static int
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001699spider_net_download_firmware(struct spider_net_card *card,
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001700 u8 *firmware_ptr)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001701{
1702 int sequencer, i;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001703 u32 *fw_ptr = (u32 *)firmware_ptr;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001704
1705 /* stop sequencers */
1706 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1707 SPIDER_NET_STOP_SEQ_VALUE);
1708
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001709 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1710 sequencer++) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001711 spider_net_write_reg(card,
1712 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001713 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001714 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1715 sequencer * 8, *fw_ptr);
1716 fw_ptr++;
1717 }
1718 }
1719
Arnd Bergmann0d3ea162006-01-12 17:16:41 -05001720 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1721 return -EIO;
1722
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001723 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1724 SPIDER_NET_RUN_SEQ_VALUE);
Arnd Bergmann0d3ea162006-01-12 17:16:41 -05001725
1726 return 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001727}
1728
1729/**
1730 * spider_net_init_firmware - reads in firmware parts
1731 * @card: card structure
1732 *
1733 * Returns 0 on success, <0 on failure
1734 *
1735 * spider_net_init_firmware opens the sequencer firmware and does some basic
1736 * checks. This function opens and releases the firmware structure. A call
1737 * to download the firmware is performed before the release.
1738 *
1739 * Firmware format
1740 * ===============
1741 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1742 * the program for each sequencer. Use the command
1743 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1744 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1745 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1746 *
1747 * to generate spider_fw.bin, if you have sequencer programs with something
1748 * like the following contents for each sequencer:
1749 * <ONE LINE COMMENT>
1750 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1751 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1752 * ...
1753 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1754 */
1755static int
1756spider_net_init_firmware(struct spider_net_card *card)
1757{
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001758 struct firmware *firmware = NULL;
Arnd Bergmann030d6752006-01-12 17:16:42 -05001759 struct device_node *dn;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001760 u8 *fw_prop = NULL;
1761 int err = -ENOENT;
1762 int fw_size;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001763
Arnd Bergmann030d6752006-01-12 17:16:42 -05001764 if (request_firmware((const struct firmware **)&firmware,
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001765 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1766 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1767 netif_msg_probe(card) ) {
1768 pr_err("Incorrect size of spidernet firmware in " \
1769 "filesystem. Looking in host firmware...\n");
1770 goto try_host_fw;
1771 }
1772 err = spider_net_download_firmware(card, firmware->data);
Arnd Bergmann030d6752006-01-12 17:16:42 -05001773
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001774 release_firmware(firmware);
1775 if (err)
1776 goto try_host_fw;
Arnd Bergmann030d6752006-01-12 17:16:42 -05001777
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001778 goto done;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001779 }
1780
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001781try_host_fw:
1782 dn = pci_device_to_OF_node(card->pdev);
1783 if (!dn)
1784 goto out_err;
1785
1786 fw_prop = (u8 *)get_property(dn, "firmware", &fw_size);
1787 if (!fw_prop)
1788 goto out_err;
1789
1790 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1791 netif_msg_probe(card) ) {
1792 pr_err("Incorrect size of spidernet firmware in " \
1793 "host firmware\n");
1794 goto done;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001795 }
1796
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001797 err = spider_net_download_firmware(card, fw_prop);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001798
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001799done:
1800 return err;
1801out_err:
1802 if (netif_msg_probe(card))
1803 pr_err("Couldn't find spidernet firmware in filesystem " \
1804 "or host firmware\n");
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001805 return err;
1806}
1807
1808/**
1809 * spider_net_workaround_rxramfull - work around firmware bug
1810 * @card: card structure
1811 *
1812 * no return value
1813 **/
1814static void
1815spider_net_workaround_rxramfull(struct spider_net_card *card)
1816{
1817 int i, sequencer = 0;
1818
1819 /* cancel reset */
1820 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1821 SPIDER_NET_CKRCTRL_RUN_VALUE);
1822
1823 /* empty sequencer data */
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001824 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1825 sequencer++) {
Jens Osterkampee962a52006-07-13 11:54:23 +02001826 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001827 sequencer * 8, 0x0);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001828 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001829 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1830 sequencer * 8, 0x0);
1831 }
1832 }
1833
1834 /* set sequencer operation */
1835 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
1836
1837 /* reset */
1838 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1839 SPIDER_NET_CKRCTRL_STOP_VALUE);
1840}
1841
1842/**
Jens Osterkampbdd01502006-07-13 11:54:08 +02001843 * spider_net_stop - called upon ifconfig down
1844 * @netdev: interface device structure
1845 *
1846 * always returns 0
1847 */
1848int
1849spider_net_stop(struct net_device *netdev)
1850{
1851 struct spider_net_card *card = netdev_priv(netdev);
1852
1853 tasklet_kill(&card->rxram_full_tl);
1854 netif_poll_disable(netdev);
1855 netif_carrier_off(netdev);
1856 netif_stop_queue(netdev);
1857 del_timer_sync(&card->tx_timer);
1858
1859 /* disable/mask all interrupts */
1860 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
1861 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
1862 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
1863
1864 /* free_irq(netdev->irq, netdev);*/
1865 free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
1866
1867 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
1868 SPIDER_NET_DMA_TX_FEND_VALUE);
1869
1870 /* turn off DMA, force end */
1871 spider_net_disable_rxdmac(card);
1872
1873 /* release chains */
1874 if (spin_trylock(&card->tx_chain.lock)) {
1875 spider_net_release_tx_chain(card, 1);
1876 spin_unlock(&card->tx_chain.lock);
1877 }
1878
1879 spider_net_free_chain(card, &card->tx_chain);
1880 spider_net_free_chain(card, &card->rx_chain);
1881
1882 return 0;
1883}
1884
1885/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001886 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
1887 * function (to be called not under interrupt status)
1888 * @data: data, is interface device structure
1889 *
1890 * called as task when tx hangs, resets interface (if interface is up)
1891 */
1892static void
1893spider_net_tx_timeout_task(void *data)
1894{
1895 struct net_device *netdev = data;
1896 struct spider_net_card *card = netdev_priv(netdev);
1897
1898 if (!(netdev->flags & IFF_UP))
1899 goto out;
1900
1901 netif_device_detach(netdev);
1902 spider_net_stop(netdev);
1903
1904 spider_net_workaround_rxramfull(card);
1905 spider_net_init_card(card);
1906
1907 if (spider_net_setup_phy(card))
1908 goto out;
1909 if (spider_net_init_firmware(card))
1910 goto out;
1911
1912 spider_net_open(netdev);
Jens Osterkampbdd01502006-07-13 11:54:08 +02001913 spider_net_kick_tx_dma(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001914 netif_device_attach(netdev);
1915
1916out:
1917 atomic_dec(&card->tx_timeout_task_counter);
1918}
1919
1920/**
1921 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
1922 * @netdev: interface device structure
1923 *
1924 * called, if tx hangs. Schedules a task that resets the interface
1925 */
1926static void
1927spider_net_tx_timeout(struct net_device *netdev)
1928{
1929 struct spider_net_card *card;
1930
1931 card = netdev_priv(netdev);
1932 atomic_inc(&card->tx_timeout_task_counter);
1933 if (netdev->flags & IFF_UP)
1934 schedule_work(&card->tx_timeout_task);
1935 else
1936 atomic_dec(&card->tx_timeout_task_counter);
1937}
1938
1939/**
1940 * spider_net_setup_netdev_ops - initialization of net_device operations
1941 * @netdev: net_device structure
1942 *
1943 * fills out function pointers in the net_device structure
1944 */
1945static void
1946spider_net_setup_netdev_ops(struct net_device *netdev)
1947{
1948 netdev->open = &spider_net_open;
1949 netdev->stop = &spider_net_stop;
1950 netdev->hard_start_xmit = &spider_net_xmit;
1951 netdev->get_stats = &spider_net_get_stats;
1952 netdev->set_multicast_list = &spider_net_set_multi;
1953 netdev->set_mac_address = &spider_net_set_mac;
1954 netdev->change_mtu = &spider_net_change_mtu;
1955 netdev->do_ioctl = &spider_net_do_ioctl;
1956 /* tx watchdog */
1957 netdev->tx_timeout = &spider_net_tx_timeout;
1958 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
1959 /* NAPI */
1960 netdev->poll = &spider_net_poll;
1961 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
1962 /* HW VLAN */
1963 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
1964 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
1965 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
1966#ifdef CONFIG_NET_POLL_CONTROLLER
1967 /* poll controller */
1968 netdev->poll_controller = &spider_net_poll_controller;
1969#endif /* CONFIG_NET_POLL_CONTROLLER */
1970 /* ethtool ops */
1971 netdev->ethtool_ops = &spider_net_ethtool_ops;
1972}
1973
1974/**
1975 * spider_net_setup_netdev - initialization of net_device
1976 * @card: card structure
1977 *
1978 * Returns 0 on success or <0 on failure
1979 *
1980 * spider_net_setup_netdev initializes the net_device structure
1981 **/
1982static int
1983spider_net_setup_netdev(struct spider_net_card *card)
1984{
1985 int result;
1986 struct net_device *netdev = card->netdev;
1987 struct device_node *dn;
1988 struct sockaddr addr;
1989 u8 *mac;
1990
1991 SET_MODULE_OWNER(netdev);
1992 SET_NETDEV_DEV(netdev, &card->pdev->dev);
1993
1994 pci_set_drvdata(card->pdev, netdev);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001995
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001996 card->rxram_full_tl.data = (unsigned long) card;
1997 card->rxram_full_tl.func =
1998 (void (*)(unsigned long)) spider_net_handle_rxram_full;
1999 init_timer(&card->tx_timer);
2000 card->tx_timer.function =
2001 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2002 card->tx_timer.data = (unsigned long) card;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002003 netdev->irq = card->pdev->irq;
2004
2005 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2006
Jim Lewisb68a60e2006-08-14 23:00:23 -07002007 card->tx_desc = tx_descriptors;
2008 card->rx_desc = rx_descriptors;
2009
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002010 spider_net_setup_netdev_ops(netdev);
2011
Jens Osterkampbdd01502006-07-13 11:54:08 +02002012 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002013 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2014 * NETIF_F_HW_VLAN_FILTER */
2015
2016 netdev->irq = card->pdev->irq;
2017
2018 dn = pci_device_to_OF_node(card->pdev);
Jens Osterkamp543cec52005-09-06 19:30:54 -07002019 if (!dn)
2020 return -EIO;
2021
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002022 mac = (u8 *)get_property(dn, "local-mac-address", NULL);
Jens Osterkamp543cec52005-09-06 19:30:54 -07002023 if (!mac)
2024 return -EIO;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002025 memcpy(addr.sa_data, mac, ETH_ALEN);
2026
2027 result = spider_net_set_mac(netdev, &addr);
2028 if ((result) && (netif_msg_probe(card)))
2029 pr_err("Failed to set MAC address: %i\n", result);
2030
2031 result = register_netdev(netdev);
2032 if (result) {
2033 if (netif_msg_probe(card))
2034 pr_err("Couldn't register net_device: %i\n",
2035 result);
2036 return result;
2037 }
2038
2039 if (netif_msg_probe(card))
2040 pr_info("Initialized device %s.\n", netdev->name);
2041
2042 return 0;
2043}
2044
2045/**
2046 * spider_net_alloc_card - allocates net_device and card structure
2047 *
2048 * returns the card structure or NULL in case of errors
2049 *
2050 * the card and net_device structures are linked to each other
2051 */
2052static struct spider_net_card *
2053spider_net_alloc_card(void)
2054{
2055 struct net_device *netdev;
2056 struct spider_net_card *card;
2057 size_t alloc_size;
2058
2059 alloc_size = sizeof (*card) +
2060 sizeof (struct spider_net_descr) * rx_descriptors +
2061 sizeof (struct spider_net_descr) * tx_descriptors;
2062 netdev = alloc_etherdev(alloc_size);
2063 if (!netdev)
2064 return NULL;
2065
2066 card = netdev_priv(netdev);
2067 card->netdev = netdev;
2068 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
2069 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
2070 init_waitqueue_head(&card->waitq);
2071 atomic_set(&card->tx_timeout_task_counter, 0);
2072
2073 return card;
2074}
2075
2076/**
2077 * spider_net_undo_pci_setup - releases PCI ressources
2078 * @card: card structure
2079 *
2080 * spider_net_undo_pci_setup releases the mapped regions
2081 */
2082static void
2083spider_net_undo_pci_setup(struct spider_net_card *card)
2084{
2085 iounmap(card->regs);
2086 pci_release_regions(card->pdev);
2087}
2088
2089/**
2090 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2091 * @card: card structure
2092 * @pdev: PCI device
2093 *
2094 * Returns the card structure or NULL if any errors occur
2095 *
2096 * spider_net_setup_pci_dev initializes pdev and together with the
2097 * functions called in spider_net_open configures the device so that
2098 * data can be transferred over it
2099 * The net_device structure is attached to the card structure, if the
2100 * function returns without error.
2101 **/
2102static struct spider_net_card *
2103spider_net_setup_pci_dev(struct pci_dev *pdev)
2104{
2105 struct spider_net_card *card;
2106 unsigned long mmio_start, mmio_len;
2107
2108 if (pci_enable_device(pdev)) {
2109 pr_err("Couldn't enable PCI device\n");
2110 return NULL;
2111 }
2112
2113 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2114 pr_err("Couldn't find proper PCI device base address.\n");
2115 goto out_disable_dev;
2116 }
2117
2118 if (pci_request_regions(pdev, spider_net_driver_name)) {
2119 pr_err("Couldn't obtain PCI resources, aborting.\n");
2120 goto out_disable_dev;
2121 }
2122
2123 pci_set_master(pdev);
2124
2125 card = spider_net_alloc_card();
2126 if (!card) {
2127 pr_err("Couldn't allocate net_device structure, "
2128 "aborting.\n");
2129 goto out_release_regions;
2130 }
2131 card->pdev = pdev;
2132
2133 /* fetch base address and length of first resource */
2134 mmio_start = pci_resource_start(pdev, 0);
2135 mmio_len = pci_resource_len(pdev, 0);
2136
2137 card->netdev->mem_start = mmio_start;
2138 card->netdev->mem_end = mmio_start + mmio_len;
2139 card->regs = ioremap(mmio_start, mmio_len);
2140
2141 if (!card->regs) {
2142 pr_err("Couldn't obtain PCI resources, aborting.\n");
2143 goto out_release_regions;
2144 }
2145
2146 return card;
2147
2148out_release_regions:
2149 pci_release_regions(pdev);
2150out_disable_dev:
2151 pci_disable_device(pdev);
2152 pci_set_drvdata(pdev, NULL);
2153 return NULL;
2154}
2155
2156/**
2157 * spider_net_probe - initialization of a device
2158 * @pdev: PCI device
2159 * @ent: entry in the device id list
2160 *
2161 * Returns 0 on success, <0 on failure
2162 *
2163 * spider_net_probe initializes pdev and registers a net_device
2164 * structure for it. After that, the device can be ifconfig'ed up
2165 **/
2166static int __devinit
2167spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2168{
2169 int err = -EIO;
2170 struct spider_net_card *card;
2171
2172 card = spider_net_setup_pci_dev(pdev);
2173 if (!card)
2174 goto out;
2175
2176 spider_net_workaround_rxramfull(card);
2177 spider_net_init_card(card);
2178
2179 err = spider_net_setup_phy(card);
2180 if (err)
2181 goto out_undo_pci;
2182
2183 err = spider_net_init_firmware(card);
2184 if (err)
2185 goto out_undo_pci;
2186
2187 err = spider_net_setup_netdev(card);
2188 if (err)
2189 goto out_undo_pci;
2190
2191 return 0;
2192
2193out_undo_pci:
2194 spider_net_undo_pci_setup(card);
2195 free_netdev(card->netdev);
2196out:
2197 return err;
2198}
2199
2200/**
2201 * spider_net_remove - removal of a device
2202 * @pdev: PCI device
2203 *
2204 * Returns 0 on success, <0 on failure
2205 *
2206 * spider_net_remove is called to remove the device and unregisters the
2207 * net_device
2208 **/
2209static void __devexit
2210spider_net_remove(struct pci_dev *pdev)
2211{
2212 struct net_device *netdev;
2213 struct spider_net_card *card;
2214
2215 netdev = pci_get_drvdata(pdev);
2216 card = netdev_priv(netdev);
2217
2218 wait_event(card->waitq,
2219 atomic_read(&card->tx_timeout_task_counter) == 0);
2220
2221 unregister_netdev(netdev);
Jens Osterkamp543cec52005-09-06 19:30:54 -07002222
2223 /* switch off card */
2224 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2225 SPIDER_NET_CKRCTRL_STOP_VALUE);
2226 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2227 SPIDER_NET_CKRCTRL_RUN_VALUE);
2228
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002229 spider_net_undo_pci_setup(card);
2230 free_netdev(netdev);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002231}
2232
2233static struct pci_driver spider_net_driver = {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002234 .name = spider_net_driver_name,
2235 .id_table = spider_net_pci_tbl,
2236 .probe = spider_net_probe,
2237 .remove = __devexit_p(spider_net_remove)
2238};
2239
2240/**
2241 * spider_net_init - init function when the driver is loaded
2242 *
2243 * spider_net_init registers the device driver
2244 */
2245static int __init spider_net_init(void)
2246{
2247 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2248 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2249 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2250 }
2251 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2252 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2253 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2254 }
2255 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2256 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2257 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2258 }
2259 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2260 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2261 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2262 }
2263
2264 return pci_register_driver(&spider_net_driver);
2265}
2266
2267/**
2268 * spider_net_cleanup - exit function when driver is unloaded
2269 *
2270 * spider_net_cleanup unregisters the device driver
2271 */
2272static void __exit spider_net_cleanup(void)
2273{
2274 pci_unregister_driver(&spider_net_driver);
2275}
2276
2277module_init(spider_net_init);
2278module_exit(spider_net_cleanup);