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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 | ||
54 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ | |
55 | "<Jens.Osterkamp@de.ibm.com>"); | |
56 | MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); | |
57 | MODULE_LICENSE("GPL"); | |
58 | ||
59 | static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; | |
60 | static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; | |
61 | ||
62 | module_param(rx_descriptors, int, 0644); | |
63 | module_param(tx_descriptors, int, 0644); | |
64 | ||
65 | MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ | |
66 | "in rx chains"); | |
67 | MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ | |
68 | "in tx chain"); | |
69 | ||
70 | char spider_net_driver_name[] = "spidernet"; | |
71 | ||
72 | static struct pci_device_id spider_net_pci_tbl[] = { | |
73 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, | |
74 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, | |
75 | { 0, } | |
76 | }; | |
77 | ||
78 | MODULE_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 | */ | |
87 | static u32 | |
88 | spider_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 | */ | |
104 | static void | |
105 | spider_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 | ||
543cec51 JO |
111 | /** |
112 | * spider_net_write_reg_sync - writes to an SMMIO register of a card | |
113 | * @card: device structure | |
114 | * @reg: register to write to | |
115 | * @value: value to write into the specified SMMIO register | |
116 | * | |
117 | * Unlike spider_net_write_reg, this will also make sure the | |
118 | * data arrives on the card by reading the reg again. | |
119 | */ | |
120 | static void | |
121 | spider_net_write_reg_sync(struct spider_net_card *card, u32 reg, u32 value) | |
122 | { | |
123 | value = cpu_to_le32(value); | |
124 | writel(value, card->regs + reg); | |
125 | (void)readl(card->regs + reg); | |
126 | } | |
127 | ||
aaec0fab JO |
128 | /** |
129 | * spider_net_rx_irq_off - switch off rx irq on this spider card | |
130 | * @card: device structure | |
131 | * | |
132 | * switches off rx irq by masking them out in the GHIINTnMSK register | |
133 | */ | |
134 | static void | |
135 | spider_net_rx_irq_off(struct spider_net_card *card) | |
136 | { | |
137 | u32 regvalue; | |
138 | unsigned long flags; | |
139 | ||
140 | spin_lock_irqsave(&card->intmask_lock, flags); | |
141 | regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK); | |
142 | regvalue &= ~SPIDER_NET_RXINT; | |
543cec51 | 143 | spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue); |
aaec0fab JO |
144 | spin_unlock_irqrestore(&card->intmask_lock, flags); |
145 | } | |
146 | ||
147 | /** spider_net_write_phy - write to phy register | |
148 | * @netdev: adapter to be written to | |
149 | * @mii_id: id of MII | |
150 | * @reg: PHY register | |
151 | * @val: value to be written to phy register | |
152 | * | |
153 | * spider_net_write_phy_register writes to an arbitrary PHY | |
154 | * register via the spider GPCWOPCMD register. We assume the queue does | |
155 | * not run full (not more than 15 commands outstanding). | |
156 | **/ | |
157 | static void | |
158 | spider_net_write_phy(struct net_device *netdev, int mii_id, | |
159 | int reg, int val) | |
160 | { | |
161 | struct spider_net_card *card = netdev_priv(netdev); | |
162 | u32 writevalue; | |
163 | ||
164 | writevalue = ((u32)mii_id << 21) | | |
165 | ((u32)reg << 16) | ((u32)val); | |
166 | ||
167 | spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); | |
168 | } | |
169 | ||
170 | /** spider_net_read_phy - read from phy register | |
171 | * @netdev: network device to be read from | |
172 | * @mii_id: id of MII | |
173 | * @reg: PHY register | |
174 | * | |
175 | * Returns value read from PHY register | |
176 | * | |
177 | * spider_net_write_phy reads from an arbitrary PHY | |
178 | * register via the spider GPCROPCMD register | |
179 | **/ | |
180 | static int | |
181 | spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) | |
182 | { | |
183 | struct spider_net_card *card = netdev_priv(netdev); | |
184 | u32 readvalue; | |
185 | ||
186 | readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); | |
187 | spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); | |
188 | ||
189 | /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT | |
190 | * interrupt, as we poll for the completion of the read operation | |
191 | * in spider_net_read_phy. Should take about 50 us */ | |
192 | do { | |
193 | readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); | |
194 | } while (readvalue & SPIDER_NET_GPREXEC); | |
195 | ||
196 | readvalue &= SPIDER_NET_GPRDAT_MASK; | |
197 | ||
198 | return readvalue; | |
199 | } | |
200 | ||
201 | /** | |
202 | * spider_net_rx_irq_on - switch on rx irq on this spider card | |
203 | * @card: device structure | |
204 | * | |
205 | * switches on rx irq by enabling them in the GHIINTnMSK register | |
206 | */ | |
207 | static void | |
208 | spider_net_rx_irq_on(struct spider_net_card *card) | |
209 | { | |
210 | u32 regvalue; | |
211 | unsigned long flags; | |
212 | ||
213 | spin_lock_irqsave(&card->intmask_lock, flags); | |
214 | regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK); | |
215 | regvalue |= SPIDER_NET_RXINT; | |
543cec51 | 216 | spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue); |
aaec0fab JO |
217 | spin_unlock_irqrestore(&card->intmask_lock, flags); |
218 | } | |
219 | ||
220 | /** | |
221 | * spider_net_tx_irq_off - switch off tx irq on this spider card | |
222 | * @card: device structure | |
223 | * | |
224 | * switches off tx irq by masking them out in the GHIINTnMSK register | |
225 | */ | |
226 | static void | |
227 | spider_net_tx_irq_off(struct spider_net_card *card) | |
228 | { | |
229 | u32 regvalue; | |
230 | unsigned long flags; | |
231 | ||
232 | spin_lock_irqsave(&card->intmask_lock, flags); | |
233 | regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK); | |
234 | regvalue &= ~SPIDER_NET_TXINT; | |
543cec51 | 235 | spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue); |
aaec0fab JO |
236 | spin_unlock_irqrestore(&card->intmask_lock, flags); |
237 | } | |
238 | ||
239 | /** | |
240 | * spider_net_tx_irq_on - switch on tx irq on this spider card | |
241 | * @card: device structure | |
242 | * | |
243 | * switches on tx irq by enabling them in the GHIINTnMSK register | |
244 | */ | |
245 | static void | |
246 | spider_net_tx_irq_on(struct spider_net_card *card) | |
247 | { | |
248 | u32 regvalue; | |
249 | unsigned long flags; | |
250 | ||
251 | spin_lock_irqsave(&card->intmask_lock, flags); | |
252 | regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK); | |
253 | regvalue |= SPIDER_NET_TXINT; | |
543cec51 | 254 | spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue); |
aaec0fab JO |
255 | spin_unlock_irqrestore(&card->intmask_lock, flags); |
256 | } | |
257 | ||
258 | /** | |
259 | * spider_net_set_promisc - sets the unicast address or the promiscuous mode | |
260 | * @card: card structure | |
261 | * | |
262 | * spider_net_set_promisc sets the unicast destination address filter and | |
263 | * thus either allows for non-promisc mode or promisc mode | |
264 | */ | |
265 | static void | |
266 | spider_net_set_promisc(struct spider_net_card *card) | |
267 | { | |
268 | u32 macu, macl; | |
269 | struct net_device *netdev = card->netdev; | |
270 | ||
271 | if (netdev->flags & IFF_PROMISC) { | |
272 | /* clear destination entry 0 */ | |
273 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); | |
274 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); | |
275 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
276 | SPIDER_NET_PROMISC_VALUE); | |
277 | } else { | |
278 | macu = netdev->dev_addr[0]; | |
279 | macu <<= 8; | |
280 | macu |= netdev->dev_addr[1]; | |
281 | memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); | |
282 | ||
283 | macu |= SPIDER_NET_UA_DESCR_VALUE; | |
284 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); | |
285 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); | |
286 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
287 | SPIDER_NET_NONPROMISC_VALUE); | |
288 | } | |
289 | } | |
290 | ||
291 | /** | |
292 | * spider_net_get_mac_address - read mac address from spider card | |
293 | * @card: device structure | |
294 | * | |
295 | * reads MAC address from GMACUNIMACU and GMACUNIMACL registers | |
296 | */ | |
297 | static int | |
298 | spider_net_get_mac_address(struct net_device *netdev) | |
299 | { | |
300 | struct spider_net_card *card = netdev_priv(netdev); | |
301 | u32 macl, macu; | |
302 | ||
303 | macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL); | |
304 | macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU); | |
305 | ||
306 | netdev->dev_addr[0] = (macu >> 24) & 0xff; | |
307 | netdev->dev_addr[1] = (macu >> 16) & 0xff; | |
308 | netdev->dev_addr[2] = (macu >> 8) & 0xff; | |
309 | netdev->dev_addr[3] = macu & 0xff; | |
310 | netdev->dev_addr[4] = (macl >> 8) & 0xff; | |
311 | netdev->dev_addr[5] = macl & 0xff; | |
312 | ||
313 | if (!is_valid_ether_addr(&netdev->dev_addr[0])) | |
314 | return -EINVAL; | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
319 | /** | |
320 | * spider_net_get_descr_status -- returns the status of a descriptor | |
321 | * @descr: descriptor to look at | |
322 | * | |
323 | * returns the status as in the dmac_cmd_status field of the descriptor | |
324 | */ | |
325 | static enum spider_net_descr_status | |
326 | spider_net_get_descr_status(struct spider_net_descr *descr) | |
327 | { | |
328 | u32 cmd_status; | |
329 | rmb(); | |
330 | cmd_status = descr->dmac_cmd_status; | |
331 | rmb(); | |
332 | cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT; | |
333 | /* no need to mask out any bits, as cmd_status is 32 bits wide only | |
334 | * (and unsigned) */ | |
335 | return cmd_status; | |
336 | } | |
337 | ||
338 | /** | |
339 | * spider_net_set_descr_status -- sets the status of a descriptor | |
340 | * @descr: descriptor to change | |
341 | * @status: status to set in the descriptor | |
342 | * | |
343 | * changes the status to the specified value. Doesn't change other bits | |
344 | * in the status | |
345 | */ | |
346 | static void | |
347 | spider_net_set_descr_status(struct spider_net_descr *descr, | |
348 | enum spider_net_descr_status status) | |
349 | { | |
350 | u32 cmd_status; | |
351 | /* read the status */ | |
352 | mb(); | |
353 | cmd_status = descr->dmac_cmd_status; | |
354 | /* clean the upper 4 bits */ | |
355 | cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO; | |
356 | /* add the status to it */ | |
357 | cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT; | |
358 | /* and write it back */ | |
359 | descr->dmac_cmd_status = cmd_status; | |
360 | wmb(); | |
361 | } | |
362 | ||
363 | /** | |
364 | * spider_net_free_chain - free descriptor chain | |
365 | * @card: card structure | |
366 | * @chain: address of chain | |
367 | * | |
368 | */ | |
369 | static void | |
370 | spider_net_free_chain(struct spider_net_card *card, | |
371 | struct spider_net_descr_chain *chain) | |
372 | { | |
373 | struct spider_net_descr *descr; | |
374 | ||
375 | for (descr = chain->tail; !descr->bus_addr; descr = descr->next) { | |
376 | pci_unmap_single(card->pdev, descr->bus_addr, | |
377 | SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL); | |
378 | descr->bus_addr = 0; | |
379 | } | |
380 | } | |
381 | ||
382 | /** | |
383 | * spider_net_init_chain - links descriptor chain | |
384 | * @card: card structure | |
385 | * @chain: address of chain | |
386 | * @start_descr: address of descriptor array | |
387 | * @no: number of descriptors | |
388 | * | |
389 | * we manage a circular list that mirrors the hardware structure, | |
390 | * except that the hardware uses bus addresses. | |
391 | * | |
392 | * returns 0 on success, <0 on failure | |
393 | */ | |
394 | static int | |
395 | spider_net_init_chain(struct spider_net_card *card, | |
396 | struct spider_net_descr_chain *chain, | |
397 | struct spider_net_descr *start_descr, int no) | |
398 | { | |
399 | int i; | |
400 | struct spider_net_descr *descr; | |
401 | ||
402 | spin_lock_init(&card->chain_lock); | |
403 | ||
404 | descr = start_descr; | |
405 | memset(descr, 0, sizeof(*descr) * no); | |
406 | ||
407 | /* set up the hardware pointers in each descriptor */ | |
408 | for (i=0; i<no; i++, descr++) { | |
409 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
410 | ||
411 | descr->bus_addr = | |
412 | pci_map_single(card->pdev, descr, | |
413 | SPIDER_NET_DESCR_SIZE, | |
414 | PCI_DMA_BIDIRECTIONAL); | |
415 | ||
416 | if (descr->bus_addr == DMA_ERROR_CODE) | |
417 | goto iommu_error; | |
418 | ||
419 | descr->next = descr + 1; | |
420 | descr->prev = descr - 1; | |
421 | ||
422 | } | |
423 | /* do actual circular list */ | |
424 | (descr-1)->next = start_descr; | |
425 | start_descr->prev = descr-1; | |
426 | ||
427 | descr = start_descr; | |
428 | for (i=0; i < no; i++, descr++) { | |
429 | descr->next_descr_addr = descr->next->bus_addr; | |
430 | } | |
431 | ||
432 | chain->head = start_descr; | |
433 | chain->tail = start_descr; | |
434 | ||
435 | return 0; | |
436 | ||
437 | iommu_error: | |
438 | descr = start_descr; | |
439 | for (i=0; i < no; i++, descr++) | |
440 | if (descr->bus_addr) | |
441 | pci_unmap_single(card->pdev, descr->bus_addr, | |
442 | SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL); | |
443 | return -ENOMEM; | |
444 | } | |
445 | ||
446 | /** | |
447 | * spider_net_free_rx_chain_contents - frees descr contents in rx chain | |
448 | * @card: card structure | |
449 | * | |
450 | * returns 0 on success, <0 on failure | |
451 | */ | |
452 | static void | |
453 | spider_net_free_rx_chain_contents(struct spider_net_card *card) | |
454 | { | |
455 | struct spider_net_descr *descr; | |
456 | ||
457 | descr = card->rx_chain.head; | |
458 | while (descr->next != card->rx_chain.head) { | |
459 | if (descr->skb) { | |
460 | dev_kfree_skb(descr->skb); | |
461 | pci_unmap_single(card->pdev, descr->buf_addr, | |
462 | SPIDER_NET_MAX_MTU, | |
463 | PCI_DMA_BIDIRECTIONAL); | |
464 | } | |
465 | descr = descr->next; | |
466 | } | |
467 | } | |
468 | ||
469 | /** | |
470 | * spider_net_prepare_rx_descr - reinitializes a rx descriptor | |
471 | * @card: card structure | |
472 | * @descr: descriptor to re-init | |
473 | * | |
474 | * return 0 on succes, <0 on failure | |
475 | * | |
476 | * allocates a new rx skb, iommu-maps it and attaches it to the descriptor. | |
477 | * Activate the descriptor state-wise | |
478 | */ | |
479 | static int | |
480 | spider_net_prepare_rx_descr(struct spider_net_card *card, | |
481 | struct spider_net_descr *descr) | |
482 | { | |
483 | int error = 0; | |
484 | int offset; | |
485 | int bufsize; | |
486 | ||
487 | /* we need to round up the buffer size to a multiple of 128 */ | |
488 | bufsize = (SPIDER_NET_MAX_MTU + SPIDER_NET_RXBUF_ALIGN - 1) & | |
489 | (~(SPIDER_NET_RXBUF_ALIGN - 1)); | |
490 | ||
491 | /* and we need to have it 128 byte aligned, therefore we allocate a | |
492 | * bit more */ | |
493 | /* allocate an skb */ | |
494 | descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1); | |
495 | if (!descr->skb) { | |
496 | if (net_ratelimit()) | |
497 | if (netif_msg_rx_err(card)) | |
498 | pr_err("Not enough memory to allocate " | |
499 | "rx buffer\n"); | |
500 | return -ENOMEM; | |
501 | } | |
502 | descr->buf_size = bufsize; | |
503 | descr->result_size = 0; | |
504 | descr->valid_size = 0; | |
505 | descr->data_status = 0; | |
506 | descr->data_error = 0; | |
507 | ||
508 | offset = ((unsigned long)descr->skb->data) & | |
509 | (SPIDER_NET_RXBUF_ALIGN - 1); | |
510 | if (offset) | |
511 | skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); | |
512 | /* io-mmu-map the skb */ | |
513 | descr->buf_addr = pci_map_single(card->pdev, descr->skb->data, | |
514 | SPIDER_NET_MAX_MTU, | |
515 | PCI_DMA_BIDIRECTIONAL); | |
516 | if (descr->buf_addr == DMA_ERROR_CODE) { | |
517 | dev_kfree_skb_any(descr->skb); | |
518 | if (netif_msg_rx_err(card)) | |
519 | pr_err("Could not iommu-map rx buffer\n"); | |
520 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
521 | } else { | |
522 | descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED; | |
523 | } | |
524 | ||
525 | return error; | |
526 | } | |
527 | ||
528 | /** | |
529 | * spider_net_enable_rxctails - sets RX dmac chain tail addresses | |
530 | * @card: card structure | |
531 | * | |
532 | * spider_net_enable_rxctails sets the RX DMAC chain tail adresses in the | |
533 | * chip by writing to the appropriate register. DMA is enabled in | |
534 | * spider_net_enable_rxdmac. | |
535 | */ | |
536 | static void | |
537 | spider_net_enable_rxchtails(struct spider_net_card *card) | |
538 | { | |
539 | /* assume chain is aligned correctly */ | |
540 | spider_net_write_reg(card, SPIDER_NET_GDADCHA , | |
541 | card->rx_chain.tail->bus_addr); | |
542 | } | |
543 | ||
544 | /** | |
545 | * spider_net_enable_rxdmac - enables a receive DMA controller | |
546 | * @card: card structure | |
547 | * | |
548 | * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN | |
549 | * in the GDADMACCNTR register | |
550 | */ | |
551 | static void | |
552 | spider_net_enable_rxdmac(struct spider_net_card *card) | |
553 | { | |
554 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
555 | SPIDER_NET_DMA_RX_VALUE); | |
556 | } | |
557 | ||
558 | /** | |
559 | * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains | |
560 | * @card: card structure | |
561 | * | |
562 | * refills descriptors in all chains (last used chain first): allocates skbs | |
563 | * and iommu-maps them. | |
564 | */ | |
565 | static void | |
566 | spider_net_refill_rx_chain(struct spider_net_card *card) | |
567 | { | |
568 | struct spider_net_descr_chain *chain; | |
569 | int count = 0; | |
570 | unsigned long flags; | |
571 | ||
572 | chain = &card->rx_chain; | |
573 | ||
574 | spin_lock_irqsave(&card->chain_lock, flags); | |
575 | while (spider_net_get_descr_status(chain->head) == | |
576 | SPIDER_NET_DESCR_NOT_IN_USE) { | |
577 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
578 | break; | |
579 | count++; | |
580 | chain->head = chain->head->next; | |
581 | } | |
582 | spin_unlock_irqrestore(&card->chain_lock, flags); | |
583 | ||
584 | /* could be optimized, only do that, if we know the DMA processing | |
585 | * has terminated */ | |
586 | if (count) | |
587 | spider_net_enable_rxdmac(card); | |
588 | } | |
589 | ||
590 | /** | |
591 | * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains | |
592 | * @card: card structure | |
593 | * | |
594 | * returns 0 on success, <0 on failure | |
595 | */ | |
596 | static int | |
597 | spider_net_alloc_rx_skbs(struct spider_net_card *card) | |
598 | { | |
599 | int result; | |
600 | struct spider_net_descr_chain *chain; | |
601 | ||
602 | result = -ENOMEM; | |
603 | ||
604 | chain = &card->rx_chain; | |
605 | /* put at least one buffer into the chain. if this fails, | |
606 | * we've got a problem. if not, spider_net_refill_rx_chain | |
607 | * will do the rest at the end of this function */ | |
608 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
609 | goto error; | |
610 | else | |
611 | chain->head = chain->head->next; | |
612 | ||
613 | /* this will allocate the rest of the rx buffers; if not, it's | |
614 | * business as usual later on */ | |
615 | spider_net_refill_rx_chain(card); | |
616 | return 0; | |
617 | ||
618 | error: | |
619 | spider_net_free_rx_chain_contents(card); | |
620 | return result; | |
621 | } | |
622 | ||
623 | /** | |
624 | * spider_net_release_tx_descr - processes a used tx descriptor | |
625 | * @card: card structure | |
626 | * @descr: descriptor to release | |
627 | * | |
628 | * releases a used tx descriptor (unmapping, freeing of skb) | |
629 | */ | |
630 | static void | |
631 | spider_net_release_tx_descr(struct spider_net_card *card, | |
632 | struct spider_net_descr *descr) | |
633 | { | |
634 | struct sk_buff *skb; | |
635 | ||
636 | /* unmap the skb */ | |
637 | skb = descr->skb; | |
638 | pci_unmap_single(card->pdev, descr->buf_addr, skb->len, | |
639 | PCI_DMA_BIDIRECTIONAL); | |
640 | ||
641 | dev_kfree_skb_any(skb); | |
642 | ||
643 | /* set status to not used */ | |
644 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
645 | } | |
646 | ||
647 | /** | |
648 | * spider_net_release_tx_chain - processes sent tx descriptors | |
649 | * @card: adapter structure | |
650 | * @brutal: if set, don't care about whether descriptor seems to be in use | |
651 | * | |
652 | * releases the tx descriptors that spider has finished with (if non-brutal) | |
653 | * or simply release tx descriptors (if brutal) | |
654 | */ | |
655 | static void | |
656 | spider_net_release_tx_chain(struct spider_net_card *card, int brutal) | |
657 | { | |
658 | struct spider_net_descr_chain *tx_chain = &card->tx_chain; | |
659 | enum spider_net_descr_status status; | |
660 | ||
661 | spider_net_tx_irq_off(card); | |
662 | ||
663 | /* no lock for chain needed, if this is only executed once at a time */ | |
664 | again: | |
665 | for (;;) { | |
666 | status = spider_net_get_descr_status(tx_chain->tail); | |
667 | switch (status) { | |
668 | case SPIDER_NET_DESCR_CARDOWNED: | |
669 | if (!brutal) goto out; | |
670 | /* fallthrough, if we release the descriptors | |
671 | * brutally (then we don't care about | |
672 | * SPIDER_NET_DESCR_CARDOWNED) */ | |
673 | case SPIDER_NET_DESCR_RESPONSE_ERROR: | |
674 | case SPIDER_NET_DESCR_PROTECTION_ERROR: | |
675 | case SPIDER_NET_DESCR_FORCE_END: | |
676 | if (netif_msg_tx_err(card)) | |
677 | pr_err("%s: forcing end of tx descriptor " | |
678 | "with status x%02x\n", | |
679 | card->netdev->name, status); | |
680 | card->netdev_stats.tx_dropped++; | |
681 | break; | |
682 | ||
683 | case SPIDER_NET_DESCR_COMPLETE: | |
684 | card->netdev_stats.tx_packets++; | |
685 | card->netdev_stats.tx_bytes += | |
686 | tx_chain->tail->skb->len; | |
687 | break; | |
688 | ||
689 | default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */ | |
690 | goto out; | |
691 | } | |
692 | spider_net_release_tx_descr(card, tx_chain->tail); | |
693 | tx_chain->tail = tx_chain->tail->next; | |
694 | } | |
695 | out: | |
696 | netif_wake_queue(card->netdev); | |
697 | ||
698 | if (!brutal) { | |
699 | /* switch on tx irqs (while we are still in the interrupt | |
700 | * handler, so we don't get an interrupt), check again | |
701 | * for done descriptors. This results in fewer interrupts */ | |
702 | spider_net_tx_irq_on(card); | |
703 | status = spider_net_get_descr_status(tx_chain->tail); | |
704 | switch (status) { | |
705 | case SPIDER_NET_DESCR_RESPONSE_ERROR: | |
706 | case SPIDER_NET_DESCR_PROTECTION_ERROR: | |
707 | case SPIDER_NET_DESCR_FORCE_END: | |
708 | case SPIDER_NET_DESCR_COMPLETE: | |
709 | goto again; | |
710 | default: | |
711 | break; | |
712 | } | |
713 | } | |
714 | ||
715 | } | |
716 | ||
717 | /** | |
718 | * spider_net_get_multicast_hash - generates hash for multicast filter table | |
719 | * @addr: multicast address | |
720 | * | |
721 | * returns the hash value. | |
722 | * | |
723 | * spider_net_get_multicast_hash calculates a hash value for a given multicast | |
724 | * address, that is used to set the multicast filter tables | |
725 | */ | |
726 | static u8 | |
727 | spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) | |
728 | { | |
729 | /* FIXME: an addr of 01:00:5e:00:00:01 must result in 0xa9, | |
730 | * ff:ff:ff:ff:ff:ff must result in 0xfd */ | |
731 | u32 crc; | |
732 | u8 hash; | |
733 | ||
734 | crc = crc32_be(~0, addr, netdev->addr_len); | |
735 | ||
736 | hash = (crc >> 27); | |
737 | hash <<= 3; | |
738 | hash |= crc & 7; | |
739 | ||
740 | return hash; | |
741 | } | |
742 | ||
743 | /** | |
744 | * spider_net_set_multi - sets multicast addresses and promisc flags | |
745 | * @netdev: interface device structure | |
746 | * | |
747 | * spider_net_set_multi configures multicast addresses as needed for the | |
748 | * netdev interface. It also sets up multicast, allmulti and promisc | |
749 | * flags appropriately | |
750 | */ | |
751 | static void | |
752 | spider_net_set_multi(struct net_device *netdev) | |
753 | { | |
754 | struct dev_mc_list *mc; | |
755 | u8 hash; | |
756 | int i; | |
757 | u32 reg; | |
758 | struct spider_net_card *card = netdev_priv(netdev); | |
759 | unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = | |
760 | {0, }; | |
761 | ||
762 | spider_net_set_promisc(card); | |
763 | ||
764 | if (netdev->flags & IFF_ALLMULTI) { | |
765 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { | |
766 | set_bit(i, bitmask); | |
767 | } | |
768 | goto write_hash; | |
769 | } | |
770 | ||
771 | /* well, we know, what the broadcast hash value is: it's xfd | |
772 | hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ | |
773 | set_bit(0xfd, bitmask); | |
774 | ||
775 | for (mc = netdev->mc_list; mc; mc = mc->next) { | |
776 | hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr); | |
777 | set_bit(hash, bitmask); | |
778 | } | |
779 | ||
780 | write_hash: | |
781 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { | |
782 | reg = 0; | |
783 | if (test_bit(i * 4, bitmask)) | |
784 | reg += 0x08; | |
785 | reg <<= 8; | |
786 | if (test_bit(i * 4 + 1, bitmask)) | |
787 | reg += 0x08; | |
788 | reg <<= 8; | |
789 | if (test_bit(i * 4 + 2, bitmask)) | |
790 | reg += 0x08; | |
791 | reg <<= 8; | |
792 | if (test_bit(i * 4 + 3, bitmask)) | |
793 | reg += 0x08; | |
794 | ||
795 | spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); | |
796 | } | |
797 | } | |
798 | ||
799 | /** | |
800 | * spider_net_disable_rxdmac - disables the receive DMA controller | |
801 | * @card: card structure | |
802 | * | |
803 | * spider_net_disable_rxdmac terminates processing on the DMA controller by | |
804 | * turing off DMA and issueing a force end | |
805 | */ | |
806 | static void | |
807 | spider_net_disable_rxdmac(struct spider_net_card *card) | |
808 | { | |
809 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
810 | SPIDER_NET_DMA_RX_FEND_VALUE); | |
811 | } | |
812 | ||
813 | /** | |
814 | * spider_net_stop - called upon ifconfig down | |
815 | * @netdev: interface device structure | |
816 | * | |
817 | * always returns 0 | |
818 | */ | |
819 | int | |
820 | spider_net_stop(struct net_device *netdev) | |
821 | { | |
822 | struct spider_net_card *card = netdev_priv(netdev); | |
823 | ||
824 | netif_poll_disable(netdev); | |
825 | netif_carrier_off(netdev); | |
826 | netif_stop_queue(netdev); | |
827 | ||
828 | /* disable/mask all interrupts */ | |
829 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); | |
830 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); | |
831 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); | |
832 | ||
543cec51 JO |
833 | /* free_irq(netdev->irq, netdev);*/ |
834 | free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev); | |
835 | ||
aaec0fab JO |
836 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
837 | SPIDER_NET_DMA_TX_FEND_VALUE); | |
838 | ||
839 | /* turn off DMA, force end */ | |
840 | spider_net_disable_rxdmac(card); | |
841 | ||
842 | /* release chains */ | |
843 | spider_net_release_tx_chain(card, 1); | |
844 | ||
aaec0fab JO |
845 | spider_net_free_chain(card, &card->tx_chain); |
846 | spider_net_free_chain(card, &card->rx_chain); | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
851 | /** | |
852 | * spider_net_get_next_tx_descr - returns the next available tx descriptor | |
853 | * @card: device structure to get descriptor from | |
854 | * | |
855 | * returns the address of the next descriptor, or NULL if not available. | |
856 | */ | |
857 | static struct spider_net_descr * | |
858 | spider_net_get_next_tx_descr(struct spider_net_card *card) | |
859 | { | |
860 | /* check, if head points to not-in-use descr */ | |
861 | if ( spider_net_get_descr_status(card->tx_chain.head) == | |
862 | SPIDER_NET_DESCR_NOT_IN_USE ) { | |
863 | return card->tx_chain.head; | |
864 | } else { | |
865 | return NULL; | |
866 | } | |
867 | } | |
868 | ||
869 | /** | |
870 | * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field | |
871 | * @descr: descriptor structure to fill out | |
872 | * @skb: packet to consider | |
873 | * | |
874 | * fills out the command and status field of the descriptor structure, | |
875 | * depending on hardware checksum settings. This function assumes a wmb() | |
876 | * has executed before. | |
877 | */ | |
878 | static void | |
879 | spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr, | |
880 | struct sk_buff *skb) | |
881 | { | |
882 | if (skb->ip_summed != CHECKSUM_HW) { | |
883 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS; | |
884 | return; | |
885 | } | |
886 | ||
887 | /* is packet ip? | |
888 | * if yes: tcp? udp? */ | |
889 | if (skb->protocol == htons(ETH_P_IP)) { | |
890 | if (skb->nh.iph->protocol == IPPROTO_TCP) { | |
891 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS; | |
892 | } else if (skb->nh.iph->protocol == IPPROTO_UDP) { | |
893 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS; | |
894 | } else { /* the stack should checksum non-tcp and non-udp | |
895 | packets on his own: NETIF_F_IP_CSUM */ | |
896 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS; | |
897 | } | |
898 | } | |
899 | } | |
900 | ||
901 | /** | |
902 | * spider_net_prepare_tx_descr - fill tx descriptor with skb data | |
903 | * @card: card structure | |
904 | * @descr: descriptor structure to fill out | |
905 | * @skb: packet to use | |
906 | * | |
907 | * returns 0 on success, <0 on failure. | |
908 | * | |
909 | * fills out the descriptor structure with skb data and len. Copies data, | |
910 | * if needed (32bit DMA!) | |
911 | */ | |
912 | static int | |
913 | spider_net_prepare_tx_descr(struct spider_net_card *card, | |
914 | struct spider_net_descr *descr, | |
915 | struct sk_buff *skb) | |
916 | { | |
917 | descr->buf_addr = pci_map_single(card->pdev, skb->data, | |
918 | skb->len, PCI_DMA_BIDIRECTIONAL); | |
919 | if (descr->buf_addr == DMA_ERROR_CODE) { | |
920 | if (netif_msg_tx_err(card)) | |
921 | pr_err("could not iommu-map packet (%p, %i). " | |
922 | "Dropping packet\n", skb->data, skb->len); | |
923 | return -ENOMEM; | |
924 | } | |
925 | ||
926 | descr->buf_size = skb->len; | |
927 | descr->skb = skb; | |
928 | descr->data_status = 0; | |
929 | ||
930 | /* make sure the above values are in memory before we change the | |
931 | * status */ | |
932 | wmb(); | |
933 | ||
934 | spider_net_set_txdescr_cmdstat(descr,skb); | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | /** | |
940 | * spider_net_kick_tx_dma - enables TX DMA processing | |
941 | * @card: card structure | |
942 | * @descr: descriptor address to enable TX processing at | |
943 | * | |
944 | * spider_net_kick_tx_dma writes the current tx chain head as start address | |
945 | * of the tx descriptor chain and enables the transmission DMA engine | |
946 | */ | |
947 | static void | |
948 | spider_net_kick_tx_dma(struct spider_net_card *card, | |
949 | struct spider_net_descr *descr) | |
950 | { | |
951 | /* this is the only descriptor in the output chain. | |
952 | * Enable TX DMA */ | |
953 | ||
954 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
955 | descr->bus_addr); | |
956 | ||
957 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
958 | SPIDER_NET_DMA_TX_VALUE); | |
959 | } | |
960 | ||
961 | /** | |
962 | * spider_net_xmit - transmits a frame over the device | |
963 | * @skb: packet to send out | |
964 | * @netdev: interface device structure | |
965 | * | |
966 | * returns 0 on success, <0 on failure | |
967 | */ | |
968 | static int | |
969 | spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) | |
970 | { | |
971 | struct spider_net_card *card = netdev_priv(netdev); | |
972 | struct spider_net_descr *descr; | |
973 | int result; | |
974 | ||
975 | descr = spider_net_get_next_tx_descr(card); | |
976 | ||
977 | if (!descr) { | |
978 | netif_stop_queue(netdev); | |
979 | ||
980 | descr = spider_net_get_next_tx_descr(card); | |
981 | if (!descr) | |
982 | goto error; | |
983 | else | |
984 | netif_start_queue(netdev); | |
985 | } | |
986 | ||
987 | result = spider_net_prepare_tx_descr(card, descr, skb); | |
988 | if (result) | |
989 | goto error; | |
990 | ||
991 | card->tx_chain.head = card->tx_chain.head->next; | |
992 | ||
993 | /* make sure the status from spider_net_prepare_tx_descr is in | |
994 | * memory before we check out the previous descriptor */ | |
995 | wmb(); | |
996 | ||
997 | if (spider_net_get_descr_status(descr->prev) != | |
998 | SPIDER_NET_DESCR_CARDOWNED) | |
999 | spider_net_kick_tx_dma(card, descr); | |
1000 | ||
1001 | return NETDEV_TX_OK; | |
1002 | ||
1003 | error: | |
1004 | card->netdev_stats.tx_dropped++; | |
1005 | return NETDEV_TX_LOCKED; | |
1006 | } | |
1007 | ||
1008 | /** | |
1009 | * spider_net_do_ioctl - called for device ioctls | |
1010 | * @netdev: interface device structure | |
1011 | * @ifr: request parameter structure for ioctl | |
1012 | * @cmd: command code for ioctl | |
1013 | * | |
1014 | * returns 0 on success, <0 on failure. Currently, we have no special ioctls. | |
1015 | * -EOPNOTSUPP is returned, if an unknown ioctl was requested | |
1016 | */ | |
1017 | static int | |
1018 | spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
1019 | { | |
1020 | switch (cmd) { | |
1021 | default: | |
1022 | return -EOPNOTSUPP; | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | /** | |
1027 | * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on | |
1028 | * @descr: descriptor to process | |
1029 | * @card: card structure | |
1030 | * | |
1031 | * returns 1 on success, 0 if no packet was passed to the stack | |
1032 | * | |
1033 | * iommu-unmaps the skb, fills out skb structure and passes the data to the | |
1034 | * stack. The descriptor state is not changed. | |
1035 | */ | |
1036 | static int | |
1037 | spider_net_pass_skb_up(struct spider_net_descr *descr, | |
1038 | struct spider_net_card *card) | |
1039 | { | |
1040 | struct sk_buff *skb; | |
1041 | struct net_device *netdev; | |
1042 | u32 data_status, data_error; | |
1043 | ||
1044 | data_status = descr->data_status; | |
1045 | data_error = descr->data_error; | |
1046 | ||
1047 | netdev = card->netdev; | |
1048 | ||
1049 | /* check for errors in the data_error flag */ | |
1050 | if ((data_error & SPIDER_NET_DATA_ERROR_MASK) && | |
1051 | netif_msg_rx_err(card)) | |
1052 | pr_err("error in received descriptor found, " | |
1053 | "data_status=x%08x, data_error=x%08x\n", | |
1054 | data_status, data_error); | |
1055 | ||
1056 | /* prepare skb, unmap descriptor */ | |
1057 | skb = descr->skb; | |
1058 | pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_MTU, | |
1059 | PCI_DMA_BIDIRECTIONAL); | |
1060 | ||
1061 | /* the cases we'll throw away the packet immediately */ | |
1062 | if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) | |
1063 | return 0; | |
1064 | ||
1065 | skb->dev = netdev; | |
1066 | skb_put(skb, descr->valid_size); | |
1067 | ||
1068 | /* the card seems to add 2 bytes of junk in front | |
1069 | * of the ethernet frame */ | |
1070 | #define SPIDER_MISALIGN 2 | |
1071 | skb_pull(skb, SPIDER_MISALIGN); | |
1072 | skb->protocol = eth_type_trans(skb, netdev); | |
1073 | ||
1074 | /* checksum offload */ | |
1075 | if (card->options.rx_csum) { | |
1076 | if ( (data_status & SPIDER_NET_DATA_STATUS_CHK_MASK) && | |
1077 | (!(data_error & SPIDER_NET_DATA_ERROR_CHK_MASK)) ) | |
1078 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1079 | else | |
1080 | skb->ip_summed = CHECKSUM_NONE; | |
1081 | } else { | |
1082 | skb->ip_summed = CHECKSUM_NONE; | |
1083 | } | |
1084 | ||
1085 | if (data_status & SPIDER_NET_VLAN_PACKET) { | |
1086 | /* further enhancements: HW-accel VLAN | |
1087 | * vlan_hwaccel_receive_skb | |
1088 | */ | |
1089 | } | |
1090 | ||
1091 | /* pass skb up to stack */ | |
1092 | netif_receive_skb(skb); | |
1093 | ||
1094 | /* update netdevice statistics */ | |
1095 | card->netdev_stats.rx_packets++; | |
1096 | card->netdev_stats.rx_bytes += skb->len; | |
1097 | ||
1098 | return 1; | |
1099 | } | |
1100 | ||
1101 | /** | |
1102 | * spider_net_decode_descr - processes an rx descriptor | |
1103 | * @card: card structure | |
1104 | * | |
1105 | * returns 1 if a packet has been sent to the stack, otherwise 0 | |
1106 | * | |
1107 | * processes an rx descriptor by iommu-unmapping the data buffer and passing | |
1108 | * the packet up to the stack | |
1109 | */ | |
1110 | static int | |
1111 | spider_net_decode_one_descr(struct spider_net_card *card) | |
1112 | { | |
1113 | enum spider_net_descr_status status; | |
1114 | struct spider_net_descr *descr; | |
1115 | struct spider_net_descr_chain *chain; | |
1116 | int result; | |
1117 | ||
1118 | chain = &card->rx_chain; | |
1119 | descr = chain->tail; | |
1120 | ||
1121 | status = spider_net_get_descr_status(descr); | |
1122 | ||
1123 | if (status == SPIDER_NET_DESCR_CARDOWNED) { | |
1124 | /* nothing in the descriptor yet */ | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) { | |
1129 | /* not initialized yet, I bet chain->tail == chain->head | |
1130 | * and the ring is empty */ | |
1131 | spider_net_refill_rx_chain(card); | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | /* descriptor definitively used -- move on head */ | |
1136 | chain->tail = descr->next; | |
1137 | ||
1138 | result = 0; | |
1139 | if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || | |
1140 | (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || | |
1141 | (status == SPIDER_NET_DESCR_FORCE_END) ) { | |
1142 | if (netif_msg_rx_err(card)) | |
1143 | pr_err("%s: dropping RX descriptor with state %d\n", | |
1144 | card->netdev->name, status); | |
1145 | card->netdev_stats.rx_dropped++; | |
1146 | goto refill; | |
1147 | } | |
1148 | ||
1149 | if ( (status != SPIDER_NET_DESCR_COMPLETE) && | |
1150 | (status != SPIDER_NET_DESCR_FRAME_END) ) { | |
1151 | if (netif_msg_rx_err(card)) | |
1152 | pr_err("%s: RX descriptor with state %d\n", | |
1153 | card->netdev->name, status); | |
1154 | goto refill; | |
1155 | } | |
1156 | ||
1157 | /* ok, we've got a packet in descr */ | |
1158 | result = spider_net_pass_skb_up(descr, card); | |
1159 | refill: | |
1160 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
1161 | /* change the descriptor state: */ | |
1162 | spider_net_refill_rx_chain(card); | |
1163 | ||
1164 | return result; | |
1165 | } | |
1166 | ||
1167 | /** | |
1168 | * spider_net_poll - NAPI poll function called by the stack to return packets | |
1169 | * @netdev: interface device structure | |
1170 | * @budget: number of packets we can pass to the stack at most | |
1171 | * | |
1172 | * returns 0 if no more packets available to the driver/stack. Returns 1, | |
1173 | * if the quota is exceeded, but the driver has still packets. | |
1174 | * | |
1175 | * spider_net_poll returns all packets from the rx descriptors to the stack | |
1176 | * (using netif_receive_skb). If all/enough packets are up, the driver | |
1177 | * reenables interrupts and returns 0. If not, 1 is returned. | |
1178 | */ | |
1179 | static int | |
1180 | spider_net_poll(struct net_device *netdev, int *budget) | |
1181 | { | |
1182 | struct spider_net_card *card = netdev_priv(netdev); | |
1183 | int packets_to_do, packets_done = 0; | |
1184 | int no_more_packets = 0; | |
1185 | ||
1186 | packets_to_do = min(*budget, netdev->quota); | |
1187 | ||
1188 | while (packets_to_do) { | |
1189 | if (spider_net_decode_one_descr(card)) { | |
1190 | packets_done++; | |
1191 | packets_to_do--; | |
1192 | } else { | |
1193 | /* no more packets for the stack */ | |
1194 | no_more_packets = 1; | |
1195 | break; | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | netdev->quota -= packets_done; | |
1200 | *budget -= packets_done; | |
1201 | ||
1202 | /* if all packets are in the stack, enable interrupts and return 0 */ | |
1203 | /* if not, return 1 */ | |
1204 | if (no_more_packets) { | |
1205 | netif_rx_complete(netdev); | |
1206 | spider_net_rx_irq_on(card); | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | return 1; | |
1211 | } | |
1212 | ||
1213 | /** | |
1214 | * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card | |
1215 | * @netdev: interface device structure | |
1216 | * @grp: vlan_group structure that is registered (NULL on destroying interface) | |
1217 | */ | |
1218 | static void | |
1219 | spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp) | |
1220 | { | |
1221 | /* further enhancement... yet to do */ | |
1222 | return; | |
1223 | } | |
1224 | ||
1225 | /** | |
1226 | * spider_net_vlan_rx_add - adds VLAN id to the card filter | |
1227 | * @netdev: interface device structure | |
1228 | * @vid: VLAN id to add | |
1229 | */ | |
1230 | static void | |
1231 | spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid) | |
1232 | { | |
1233 | /* further enhancement... yet to do */ | |
1234 | /* add vid to card's VLAN filter table */ | |
1235 | return; | |
1236 | } | |
1237 | ||
1238 | /** | |
1239 | * spider_net_vlan_rx_kill - removes VLAN id to the card filter | |
1240 | * @netdev: interface device structure | |
1241 | * @vid: VLAN id to remove | |
1242 | */ | |
1243 | static void | |
1244 | spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid) | |
1245 | { | |
1246 | /* further enhancement... yet to do */ | |
1247 | /* remove vid from card's VLAN filter table */ | |
1248 | } | |
1249 | ||
1250 | /** | |
1251 | * spider_net_get_stats - get interface statistics | |
1252 | * @netdev: interface device structure | |
1253 | * | |
1254 | * returns the interface statistics residing in the spider_net_card struct | |
1255 | */ | |
1256 | static struct net_device_stats * | |
1257 | spider_net_get_stats(struct net_device *netdev) | |
1258 | { | |
1259 | struct spider_net_card *card = netdev_priv(netdev); | |
1260 | struct net_device_stats *stats = &card->netdev_stats; | |
1261 | return stats; | |
1262 | } | |
1263 | ||
1264 | /** | |
1265 | * spider_net_change_mtu - changes the MTU of an interface | |
1266 | * @netdev: interface device structure | |
1267 | * @new_mtu: new MTU value | |
1268 | * | |
1269 | * returns 0 on success, <0 on failure | |
1270 | */ | |
1271 | static int | |
1272 | spider_net_change_mtu(struct net_device *netdev, int new_mtu) | |
1273 | { | |
1274 | /* no need to re-alloc skbs or so -- the max mtu is about 2.3k | |
1275 | * and mtu is outbound only anyway */ | |
1276 | if ( (new_mtu < SPIDER_NET_MIN_MTU ) || | |
1277 | (new_mtu > SPIDER_NET_MAX_MTU) ) | |
1278 | return -EINVAL; | |
1279 | netdev->mtu = new_mtu; | |
1280 | return 0; | |
1281 | } | |
1282 | ||
1283 | /** | |
1284 | * spider_net_set_mac - sets the MAC of an interface | |
1285 | * @netdev: interface device structure | |
1286 | * @ptr: pointer to new MAC address | |
1287 | * | |
1288 | * Returns 0 on success, <0 on failure. Currently, we don't support this | |
1289 | * and will always return EOPNOTSUPP. | |
1290 | */ | |
1291 | static int | |
1292 | spider_net_set_mac(struct net_device *netdev, void *p) | |
1293 | { | |
1294 | struct spider_net_card *card = netdev_priv(netdev); | |
054034db | 1295 | u32 macl, macu, regvalue; |
aaec0fab JO |
1296 | struct sockaddr *addr = p; |
1297 | ||
aaec0fab JO |
1298 | if (!is_valid_ether_addr(addr->sa_data)) |
1299 | return -EADDRNOTAVAIL; | |
1300 | ||
054034db JO |
1301 | /* switch off GMACTPE and GMACRPE */ |
1302 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1303 | regvalue &= ~((1 << 5) | (1 << 6)); | |
1304 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1305 | ||
1306 | /* write mac */ | |
aaec0fab JO |
1307 | macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) + |
1308 | (addr->sa_data[2]<<8) + (addr->sa_data[3]); | |
1309 | macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]); | |
1310 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); | |
1311 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); | |
1312 | ||
054034db JO |
1313 | /* switch GMACTPE and GMACRPE back on */ |
1314 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1315 | regvalue |= ((1 << 5) | (1 << 6)); | |
1316 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1317 | ||
aaec0fab JO |
1318 | spider_net_set_promisc(card); |
1319 | ||
1320 | /* look up, whether we have been successful */ | |
1321 | if (spider_net_get_mac_address(netdev)) | |
1322 | return -EADDRNOTAVAIL; | |
1323 | if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len)) | |
1324 | return -EADDRNOTAVAIL; | |
1325 | ||
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | /** | |
1330 | * spider_net_enable_txdmac - enables a TX DMA controller | |
1331 | * @card: card structure | |
1332 | * | |
1333 | * spider_net_enable_txdmac enables the TX DMA controller by setting the | |
1334 | * descriptor chain tail address | |
1335 | */ | |
1336 | static void | |
1337 | spider_net_enable_txdmac(struct spider_net_card *card) | |
1338 | { | |
1339 | /* assume chain is aligned correctly */ | |
1340 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
1341 | card->tx_chain.tail->bus_addr); | |
1342 | } | |
1343 | ||
1344 | /** | |
1345 | * spider_net_handle_error_irq - handles errors raised by an interrupt | |
1346 | * @card: card structure | |
1347 | * @status_reg: interrupt status register 0 (GHIINT0STS) | |
1348 | * | |
1349 | * spider_net_handle_error_irq treats or ignores all error conditions | |
1350 | * found when an interrupt is presented | |
1351 | */ | |
1352 | static void | |
1353 | spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg) | |
1354 | { | |
1355 | u32 error_reg1, error_reg2; | |
1356 | u32 i; | |
1357 | int show_error = 1; | |
1358 | ||
1359 | error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); | |
1360 | error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); | |
1361 | ||
1362 | /* check GHIINT0STS ************************************/ | |
1363 | if (status_reg) | |
1364 | for (i = 0; i < 32; i++) | |
1365 | if (status_reg & (1<<i)) | |
1366 | switch (i) | |
1367 | { | |
1368 | /* let error_reg1 and error_reg2 evaluation decide, what to do | |
1369 | case SPIDER_NET_PHYINT: | |
1370 | case SPIDER_NET_GMAC2INT: | |
1371 | case SPIDER_NET_GMAC1INT: | |
1372 | case SPIDER_NET_GIPSINT: | |
1373 | case SPIDER_NET_GFIFOINT: | |
1374 | case SPIDER_NET_DMACINT: | |
1375 | case SPIDER_NET_GSYSINT: | |
1376 | break; */ | |
1377 | ||
1378 | case SPIDER_NET_GPWOPCMPINT: | |
1379 | /* PHY write operation completed */ | |
1380 | show_error = 0; | |
1381 | break; | |
1382 | case SPIDER_NET_GPROPCMPINT: | |
1383 | /* PHY read operation completed */ | |
1384 | /* we don't use semaphores, as we poll for the completion | |
1385 | * of the read operation in spider_net_read_phy. Should take | |
1386 | * about 50 us */ | |
1387 | show_error = 0; | |
1388 | break; | |
1389 | case SPIDER_NET_GPWFFINT: | |
1390 | /* PHY command queue full */ | |
1391 | if (netif_msg_intr(card)) | |
1392 | pr_err("PHY write queue full\n"); | |
1393 | show_error = 0; | |
1394 | break; | |
1395 | ||
1396 | /* case SPIDER_NET_GRMDADRINT: not used. print a message */ | |
1397 | /* case SPIDER_NET_GRMARPINT: not used. print a message */ | |
1398 | /* case SPIDER_NET_GRMMPINT: not used. print a message */ | |
1399 | ||
1400 | case SPIDER_NET_GDTDEN0INT: | |
1401 | /* someone has set TX_DMA_EN to 0 */ | |
1402 | show_error = 0; | |
1403 | break; | |
1404 | ||
1405 | case SPIDER_NET_GDDDEN0INT: /* fallthrough */ | |
1406 | case SPIDER_NET_GDCDEN0INT: /* fallthrough */ | |
1407 | case SPIDER_NET_GDBDEN0INT: /* fallthrough */ | |
1408 | case SPIDER_NET_GDADEN0INT: | |
1409 | /* someone has set RX_DMA_EN to 0 */ | |
1410 | show_error = 0; | |
1411 | break; | |
1412 | ||
1413 | /* RX interrupts */ | |
1414 | case SPIDER_NET_GDDFDCINT: | |
1415 | case SPIDER_NET_GDCFDCINT: | |
1416 | case SPIDER_NET_GDBFDCINT: | |
1417 | case SPIDER_NET_GDAFDCINT: | |
1418 | /* case SPIDER_NET_GDNMINT: not used. print a message */ | |
1419 | /* case SPIDER_NET_GCNMINT: not used. print a message */ | |
1420 | /* case SPIDER_NET_GBNMINT: not used. print a message */ | |
1421 | /* case SPIDER_NET_GANMINT: not used. print a message */ | |
1422 | /* case SPIDER_NET_GRFNMINT: not used. print a message */ | |
1423 | show_error = 0; | |
1424 | break; | |
1425 | ||
1426 | /* TX interrupts */ | |
1427 | case SPIDER_NET_GDTFDCINT: | |
1428 | show_error = 0; | |
1429 | break; | |
1430 | case SPIDER_NET_GTTEDINT: | |
1431 | show_error = 0; | |
1432 | break; | |
1433 | case SPIDER_NET_GDTDCEINT: | |
1434 | /* chain end. If a descriptor should be sent, kick off | |
1435 | * tx dma | |
1436 | if (card->tx_chain.tail == card->tx_chain.head) | |
1437 | spider_net_kick_tx_dma(card); | |
1438 | show_error = 0; */ | |
1439 | break; | |
1440 | ||
1441 | /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ | |
1442 | /* case SPIDER_NET_GFREECNTINT: not used. print a message */ | |
1443 | } | |
1444 | ||
1445 | /* check GHIINT1STS ************************************/ | |
1446 | if (error_reg1) | |
1447 | for (i = 0; i < 32; i++) | |
1448 | if (error_reg1 & (1<<i)) | |
1449 | switch (i) | |
1450 | { | |
1451 | case SPIDER_NET_GTMFLLINT: | |
1452 | if (netif_msg_intr(card)) | |
1453 | pr_err("Spider TX RAM full\n"); | |
1454 | show_error = 0; | |
1455 | break; | |
1456 | case SPIDER_NET_GRMFLLINT: | |
1457 | if (netif_msg_intr(card)) | |
1458 | pr_err("Spider RX RAM full, incoming packets " | |
1459 | "might be discarded !\n"); | |
1460 | netif_rx_schedule(card->netdev); | |
1461 | spider_net_enable_rxchtails(card); | |
1462 | spider_net_enable_rxdmac(card); | |
1463 | break; | |
1464 | ||
1465 | /* case SPIDER_NET_GTMSHTINT: problem, print a message */ | |
1466 | case SPIDER_NET_GDTINVDINT: | |
1467 | /* allrighty. tx from previous descr ok */ | |
1468 | show_error = 0; | |
1469 | break; | |
1470 | /* case SPIDER_NET_GRFDFLLINT: print a message down there */ | |
1471 | /* case SPIDER_NET_GRFCFLLINT: print a message down there */ | |
1472 | /* case SPIDER_NET_GRFBFLLINT: print a message down there */ | |
1473 | /* case SPIDER_NET_GRFAFLLINT: print a message down there */ | |
1474 | ||
1475 | /* chain end */ | |
1476 | case SPIDER_NET_GDDDCEINT: /* fallthrough */ | |
1477 | case SPIDER_NET_GDCDCEINT: /* fallthrough */ | |
1478 | case SPIDER_NET_GDBDCEINT: /* fallthrough */ | |
1479 | case SPIDER_NET_GDADCEINT: | |
1480 | if (netif_msg_intr(card)) | |
1481 | pr_err("got descriptor chain end interrupt, " | |
1482 | "restarting DMAC %c.\n", | |
1483 | 'D'+i-SPIDER_NET_GDDDCEINT); | |
1484 | spider_net_refill_rx_chain(card); | |
1485 | show_error = 0; | |
1486 | break; | |
1487 | ||
1488 | /* invalid descriptor */ | |
1489 | case SPIDER_NET_GDDINVDINT: /* fallthrough */ | |
1490 | case SPIDER_NET_GDCINVDINT: /* fallthrough */ | |
1491 | case SPIDER_NET_GDBINVDINT: /* fallthrough */ | |
1492 | case SPIDER_NET_GDAINVDINT: | |
1493 | /* could happen when rx chain is full */ | |
1494 | spider_net_refill_rx_chain(card); | |
1495 | show_error = 0; | |
1496 | break; | |
1497 | ||
1498 | /* case SPIDER_NET_GDTRSERINT: problem, print a message */ | |
1499 | /* case SPIDER_NET_GDDRSERINT: problem, print a message */ | |
1500 | /* case SPIDER_NET_GDCRSERINT: problem, print a message */ | |
1501 | /* case SPIDER_NET_GDBRSERINT: problem, print a message */ | |
1502 | /* case SPIDER_NET_GDARSERINT: problem, print a message */ | |
1503 | /* case SPIDER_NET_GDSERINT: problem, print a message */ | |
1504 | /* case SPIDER_NET_GDTPTERINT: problem, print a message */ | |
1505 | /* case SPIDER_NET_GDDPTERINT: problem, print a message */ | |
1506 | /* case SPIDER_NET_GDCPTERINT: problem, print a message */ | |
1507 | /* case SPIDER_NET_GDBPTERINT: problem, print a message */ | |
1508 | /* case SPIDER_NET_GDAPTERINT: problem, print a message */ | |
1509 | default: | |
1510 | show_error = 1; | |
1511 | break; | |
1512 | } | |
1513 | ||
1514 | /* check GHIINT2STS ************************************/ | |
1515 | if (error_reg2) | |
1516 | for (i = 0; i < 32; i++) | |
1517 | if (error_reg2 & (1<<i)) | |
1518 | switch (i) | |
1519 | { | |
1520 | /* there is nothing we can (want to) do at this time. Log a | |
1521 | * message, we can switch on and off the specific values later on | |
1522 | case SPIDER_NET_GPROPERINT: | |
1523 | case SPIDER_NET_GMCTCRSNGINT: | |
1524 | case SPIDER_NET_GMCTLCOLINT: | |
1525 | case SPIDER_NET_GMCTTMOTINT: | |
1526 | case SPIDER_NET_GMCRCAERINT: | |
1527 | case SPIDER_NET_GMCRCALERINT: | |
1528 | case SPIDER_NET_GMCRALNERINT: | |
1529 | case SPIDER_NET_GMCROVRINT: | |
1530 | case SPIDER_NET_GMCRRNTINT: | |
1531 | case SPIDER_NET_GMCRRXERINT: | |
1532 | case SPIDER_NET_GTITCSERINT: | |
1533 | case SPIDER_NET_GTIFMTERINT: | |
1534 | case SPIDER_NET_GTIPKTRVKINT: | |
1535 | case SPIDER_NET_GTISPINGINT: | |
1536 | case SPIDER_NET_GTISADNGINT: | |
1537 | case SPIDER_NET_GTISPDNGINT: | |
1538 | case SPIDER_NET_GRIFMTERINT: | |
1539 | case SPIDER_NET_GRIPKTRVKINT: | |
1540 | case SPIDER_NET_GRISPINGINT: | |
1541 | case SPIDER_NET_GRISADNGINT: | |
1542 | case SPIDER_NET_GRISPDNGINT: | |
1543 | break; | |
1544 | */ | |
1545 | default: | |
1546 | break; | |
1547 | } | |
1548 | ||
1549 | if ((show_error) && (netif_msg_intr(card))) | |
1550 | pr_err("Got error interrupt, GHIINT0STS = 0x%08x, " | |
1551 | "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", | |
1552 | status_reg, error_reg1, error_reg2); | |
1553 | ||
1554 | /* clear interrupt sources */ | |
1555 | spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); | |
1556 | spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); | |
1557 | } | |
1558 | ||
1559 | /** | |
1560 | * spider_net_interrupt - interrupt handler for spider_net | |
1561 | * @irq: interupt number | |
1562 | * @ptr: pointer to net_device | |
1563 | * @regs: PU registers | |
1564 | * | |
1565 | * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no | |
1566 | * interrupt found raised by card. | |
1567 | * | |
1568 | * This is the interrupt handler, that turns off | |
1569 | * interrupts for this device and makes the stack poll the driver | |
1570 | */ | |
1571 | static irqreturn_t | |
1572 | spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
1573 | { | |
1574 | struct net_device *netdev = ptr; | |
1575 | struct spider_net_card *card = netdev_priv(netdev); | |
1576 | u32 status_reg; | |
1577 | ||
1578 | status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); | |
1579 | ||
1580 | if (!status_reg) | |
1581 | return IRQ_NONE; | |
1582 | ||
1583 | if (status_reg & SPIDER_NET_TXINT) | |
1584 | spider_net_release_tx_chain(card, 0); | |
1585 | ||
1586 | if (status_reg & SPIDER_NET_RXINT ) { | |
1587 | spider_net_rx_irq_off(card); | |
1588 | netif_rx_schedule(netdev); | |
1589 | } | |
1590 | ||
1591 | /* we do this after rx and tx processing, as we want the tx chain | |
1592 | * processed to see, whether we should restart tx dma processing */ | |
1593 | spider_net_handle_error_irq(card, status_reg); | |
1594 | ||
1595 | /* clear interrupt sources */ | |
1596 | spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); | |
1597 | ||
1598 | return IRQ_HANDLED; | |
1599 | } | |
1600 | ||
1601 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1602 | /** | |
1603 | * spider_net_poll_controller - artificial interrupt for netconsole etc. | |
1604 | * @netdev: interface device structure | |
1605 | * | |
1606 | * see Documentation/networking/netconsole.txt | |
1607 | */ | |
1608 | static void | |
1609 | spider_net_poll_controller(struct net_device *netdev) | |
1610 | { | |
1611 | disable_irq(netdev->irq); | |
1612 | spider_net_interrupt(netdev->irq, netdev, NULL); | |
1613 | enable_irq(netdev->irq); | |
1614 | } | |
1615 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1616 | ||
1617 | /** | |
1618 | * spider_net_init_card - initializes the card | |
1619 | * @card: card structure | |
1620 | * | |
1621 | * spider_net_init_card initializes the card so that other registers can | |
1622 | * be used | |
1623 | */ | |
1624 | static void | |
1625 | spider_net_init_card(struct spider_net_card *card) | |
1626 | { | |
1627 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1628 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1629 | ||
1630 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1631 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
1632 | } | |
1633 | ||
1634 | /** | |
1635 | * spider_net_enable_card - enables the card by setting all kinds of regs | |
1636 | * @card: card structure | |
1637 | * | |
1638 | * spider_net_enable_card sets a lot of SMMIO registers to enable the device | |
1639 | */ | |
1640 | static void | |
1641 | spider_net_enable_card(struct spider_net_card *card) | |
1642 | { | |
1643 | int i; | |
1644 | /* the following array consists of (register),(value) pairs | |
1645 | * that are set in this function. A register of 0 ends the list */ | |
1646 | u32 regs[][2] = { | |
1647 | { SPIDER_NET_GRESUMINTNUM, 0 }, | |
1648 | { SPIDER_NET_GREINTNUM, 0 }, | |
1649 | ||
1650 | /* set interrupt frame number registers */ | |
1651 | /* clear the single DMA engine registers first */ | |
1652 | { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1653 | { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1654 | { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1655 | { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1656 | /* then set, what we really need */ | |
1657 | { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, | |
1658 | ||
1659 | /* timer counter registers and stuff */ | |
1660 | { SPIDER_NET_GFREECNNUM, 0 }, | |
1661 | { SPIDER_NET_GONETIMENUM, 0 }, | |
1662 | { SPIDER_NET_GTOUTFRMNUM, 0 }, | |
1663 | ||
1664 | /* RX mode setting */ | |
1665 | { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, | |
1666 | /* TX mode setting */ | |
1667 | { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, | |
1668 | /* IPSEC mode setting */ | |
1669 | { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, | |
1670 | ||
1671 | { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, | |
1672 | ||
1673 | { SPIDER_NET_GMRWOLCTRL, 0 }, | |
1674 | { SPIDER_NET_GTESTMD, 0 }, | |
1675 | ||
1676 | { SPIDER_NET_GMACINTEN, 0 }, | |
1677 | ||
1678 | /* flow control stuff */ | |
1679 | { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, | |
1680 | { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, | |
1681 | ||
1682 | { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, | |
1683 | { 0, 0} | |
1684 | }; | |
1685 | ||
1686 | i = 0; | |
1687 | while (regs[i][0]) { | |
1688 | spider_net_write_reg(card, regs[i][0], regs[i][1]); | |
1689 | i++; | |
1690 | } | |
1691 | ||
1692 | /* clear unicast filter table entries 1 to 14 */ | |
1693 | for (i = 1; i <= 14; i++) { | |
1694 | spider_net_write_reg(card, | |
1695 | SPIDER_NET_GMRUAFILnR + i * 8, | |
1696 | 0x00080000); | |
1697 | spider_net_write_reg(card, | |
1698 | SPIDER_NET_GMRUAFILnR + i * 8 + 4, | |
1699 | 0x00000000); | |
1700 | } | |
1701 | ||
1702 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); | |
1703 | ||
1704 | spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); | |
1705 | ||
1706 | /* set chain tail adress for RX chains and | |
1707 | * enable DMA */ | |
1708 | spider_net_enable_rxchtails(card); | |
1709 | spider_net_enable_rxdmac(card); | |
1710 | ||
1711 | spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); | |
1712 | ||
1713 | /* set chain tail adress for TX chain */ | |
1714 | spider_net_enable_txdmac(card); | |
1715 | ||
1716 | spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, | |
1717 | SPIDER_NET_LENLMT_VALUE); | |
1718 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, | |
1719 | SPIDER_NET_MACMODE_VALUE); | |
1720 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, | |
1721 | SPIDER_NET_OPMODE_VALUE); | |
1722 | ||
1723 | /* set interrupt mask registers */ | |
1724 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, | |
1725 | SPIDER_NET_INT0_MASK_VALUE); | |
1726 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, | |
1727 | SPIDER_NET_INT1_MASK_VALUE); | |
1728 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, | |
1729 | SPIDER_NET_INT2_MASK_VALUE); | |
1730 | } | |
1731 | ||
1732 | /** | |
1733 | * spider_net_open - called upon ifonfig up | |
1734 | * @netdev: interface device structure | |
1735 | * | |
1736 | * returns 0 on success, <0 on failure | |
1737 | * | |
1738 | * spider_net_open allocates all the descriptors and memory needed for | |
1739 | * operation, sets up multicast list and enables interrupts | |
1740 | */ | |
1741 | int | |
1742 | spider_net_open(struct net_device *netdev) | |
1743 | { | |
1744 | struct spider_net_card *card = netdev_priv(netdev); | |
1745 | int result; | |
1746 | ||
1747 | result = -ENOMEM; | |
1748 | if (spider_net_init_chain(card, &card->tx_chain, | |
1749 | card->descr, tx_descriptors)) | |
1750 | goto alloc_tx_failed; | |
1751 | if (spider_net_init_chain(card, &card->rx_chain, | |
1752 | card->descr + tx_descriptors, rx_descriptors)) | |
1753 | goto alloc_rx_failed; | |
1754 | ||
1755 | /* allocate rx skbs */ | |
1756 | if (spider_net_alloc_rx_skbs(card)) | |
1757 | goto alloc_skbs_failed; | |
1758 | ||
1759 | spider_net_set_multi(netdev); | |
1760 | ||
1761 | /* further enhancement: setup hw vlan, if needed */ | |
1762 | ||
1763 | result = -EBUSY; | |
1764 | if (request_irq(netdev->irq, spider_net_interrupt, | |
1765 | SA_SHIRQ, netdev->name, netdev)) | |
1766 | goto register_int_failed; | |
1767 | ||
1768 | spider_net_enable_card(card); | |
1769 | ||
543cec51 JO |
1770 | netif_start_queue(netdev); |
1771 | netif_carrier_on(netdev); | |
1772 | netif_poll_enable(netdev); | |
1773 | ||
aaec0fab JO |
1774 | return 0; |
1775 | ||
1776 | register_int_failed: | |
1777 | spider_net_free_rx_chain_contents(card); | |
1778 | alloc_skbs_failed: | |
1779 | spider_net_free_chain(card, &card->rx_chain); | |
1780 | alloc_rx_failed: | |
1781 | spider_net_free_chain(card, &card->tx_chain); | |
1782 | alloc_tx_failed: | |
1783 | return result; | |
1784 | } | |
1785 | ||
1786 | /** | |
1787 | * spider_net_setup_phy - setup PHY | |
1788 | * @card: card structure | |
1789 | * | |
1790 | * returns 0 on success, <0 on failure | |
1791 | * | |
1792 | * spider_net_setup_phy is used as part of spider_net_probe. Sets | |
1793 | * the PHY to 1000 Mbps | |
1794 | **/ | |
1795 | static int | |
1796 | spider_net_setup_phy(struct spider_net_card *card) | |
1797 | { | |
1798 | struct mii_phy *phy = &card->phy; | |
1799 | ||
1800 | spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, | |
1801 | SPIDER_NET_DMASEL_VALUE); | |
1802 | spider_net_write_reg(card, SPIDER_NET_GPCCTRL, | |
1803 | SPIDER_NET_PHY_CTRL_VALUE); | |
1804 | phy->mii_id = 1; | |
1805 | phy->dev = card->netdev; | |
1806 | phy->mdio_read = spider_net_read_phy; | |
1807 | phy->mdio_write = spider_net_write_phy; | |
1808 | ||
1809 | mii_phy_probe(phy, phy->mii_id); | |
1810 | ||
1811 | if (phy->def->ops->setup_forced) | |
1812 | phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL); | |
1813 | ||
1814 | /* the following two writes could be moved to sungem_phy.c */ | |
1815 | /* enable fiber mode */ | |
1816 | spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x9020); | |
1817 | /* LEDs active in both modes, autosense prio = fiber */ | |
1818 | spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x945f); | |
1819 | ||
53abbf7e JO |
1820 | /* switch off fibre autoneg */ |
1821 | spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0xfc01); | |
1822 | spider_net_write_phy(card->netdev, 1, 0x0b, 0x0004); | |
1823 | ||
aaec0fab JO |
1824 | phy->def->ops->read_link(phy); |
1825 | pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name, | |
1826 | phy->speed, phy->duplex==1 ? "Full" : "Half"); | |
1827 | ||
1828 | return 0; | |
1829 | } | |
1830 | ||
1831 | /** | |
1832 | * spider_net_download_firmware - loads firmware into the adapter | |
1833 | * @card: card structure | |
1834 | * @firmware: firmware pointer | |
1835 | * | |
1836 | * spider_net_download_firmware loads the firmware opened by | |
1837 | * spider_net_init_firmware into the adapter. | |
1838 | */ | |
1839 | static void | |
1840 | spider_net_download_firmware(struct spider_net_card *card, | |
1841 | const struct firmware *firmware) | |
1842 | { | |
1843 | int sequencer, i; | |
1844 | u32 *fw_ptr = (u32 *)firmware->data; | |
1845 | ||
1846 | /* stop sequencers */ | |
1847 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1848 | SPIDER_NET_STOP_SEQ_VALUE); | |
1849 | ||
1850 | for (sequencer = 0; sequencer < 6; sequencer++) { | |
1851 | spider_net_write_reg(card, | |
1852 | SPIDER_NET_GSnPRGADR + sequencer * 8, 0); | |
1853 | for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) { | |
1854 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + | |
1855 | sequencer * 8, *fw_ptr); | |
1856 | fw_ptr++; | |
1857 | } | |
1858 | } | |
1859 | ||
1860 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1861 | SPIDER_NET_RUN_SEQ_VALUE); | |
1862 | } | |
1863 | ||
1864 | /** | |
1865 | * spider_net_init_firmware - reads in firmware parts | |
1866 | * @card: card structure | |
1867 | * | |
1868 | * Returns 0 on success, <0 on failure | |
1869 | * | |
1870 | * spider_net_init_firmware opens the sequencer firmware and does some basic | |
1871 | * checks. This function opens and releases the firmware structure. A call | |
1872 | * to download the firmware is performed before the release. | |
1873 | * | |
1874 | * Firmware format | |
1875 | * =============== | |
1876 | * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being | |
1877 | * the program for each sequencer. Use the command | |
1878 | * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ | |
1879 | * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ | |
1880 | * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin | |
1881 | * | |
1882 | * to generate spider_fw.bin, if you have sequencer programs with something | |
1883 | * like the following contents for each sequencer: | |
1884 | * <ONE LINE COMMENT> | |
1885 | * <FIRST 4-BYTES-WORD FOR SEQUENCER> | |
1886 | * <SECOND 4-BYTES-WORD FOR SEQUENCER> | |
1887 | * ... | |
1888 | * <1024th 4-BYTES-WORD FOR SEQUENCER> | |
1889 | */ | |
1890 | static int | |
1891 | spider_net_init_firmware(struct spider_net_card *card) | |
1892 | { | |
1893 | const struct firmware *firmware; | |
1894 | int err = -EIO; | |
1895 | ||
1896 | if (request_firmware(&firmware, | |
1897 | SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) < 0) { | |
1898 | if (netif_msg_probe(card)) | |
1899 | pr_err("Couldn't read in sequencer data file %s.\n", | |
1900 | SPIDER_NET_FIRMWARE_NAME); | |
1901 | firmware = NULL; | |
1902 | goto out; | |
1903 | } | |
1904 | ||
1905 | if (firmware->size != 6 * SPIDER_NET_FIRMWARE_LEN * sizeof(u32)) { | |
1906 | if (netif_msg_probe(card)) | |
1907 | pr_err("Invalid size of sequencer data file %s.\n", | |
1908 | SPIDER_NET_FIRMWARE_NAME); | |
1909 | goto out; | |
1910 | } | |
1911 | ||
1912 | spider_net_download_firmware(card, firmware); | |
1913 | ||
1914 | err = 0; | |
1915 | out: | |
1916 | release_firmware(firmware); | |
1917 | ||
1918 | return err; | |
1919 | } | |
1920 | ||
1921 | /** | |
1922 | * spider_net_workaround_rxramfull - work around firmware bug | |
1923 | * @card: card structure | |
1924 | * | |
1925 | * no return value | |
1926 | **/ | |
1927 | static void | |
1928 | spider_net_workaround_rxramfull(struct spider_net_card *card) | |
1929 | { | |
1930 | int i, sequencer = 0; | |
1931 | ||
1932 | /* cancel reset */ | |
1933 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1934 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
1935 | ||
1936 | /* empty sequencer data */ | |
1937 | for (sequencer = 0; sequencer < 6; sequencer++) { | |
1938 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + | |
1939 | sequencer * 8, 0x0); | |
1940 | for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) { | |
1941 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + | |
1942 | sequencer * 8, 0x0); | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | /* set sequencer operation */ | |
1947 | spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); | |
1948 | ||
1949 | /* reset */ | |
1950 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1951 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1952 | } | |
1953 | ||
1954 | /** | |
1955 | * spider_net_tx_timeout_task - task scheduled by the watchdog timeout | |
1956 | * function (to be called not under interrupt status) | |
1957 | * @data: data, is interface device structure | |
1958 | * | |
1959 | * called as task when tx hangs, resets interface (if interface is up) | |
1960 | */ | |
1961 | static void | |
1962 | spider_net_tx_timeout_task(void *data) | |
1963 | { | |
1964 | struct net_device *netdev = data; | |
1965 | struct spider_net_card *card = netdev_priv(netdev); | |
1966 | ||
1967 | if (!(netdev->flags & IFF_UP)) | |
1968 | goto out; | |
1969 | ||
1970 | netif_device_detach(netdev); | |
1971 | spider_net_stop(netdev); | |
1972 | ||
1973 | spider_net_workaround_rxramfull(card); | |
1974 | spider_net_init_card(card); | |
1975 | ||
1976 | if (spider_net_setup_phy(card)) | |
1977 | goto out; | |
1978 | if (spider_net_init_firmware(card)) | |
1979 | goto out; | |
1980 | ||
1981 | spider_net_open(netdev); | |
1982 | spider_net_kick_tx_dma(card, card->tx_chain.head); | |
1983 | netif_device_attach(netdev); | |
1984 | ||
1985 | out: | |
1986 | atomic_dec(&card->tx_timeout_task_counter); | |
1987 | } | |
1988 | ||
1989 | /** | |
1990 | * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. | |
1991 | * @netdev: interface device structure | |
1992 | * | |
1993 | * called, if tx hangs. Schedules a task that resets the interface | |
1994 | */ | |
1995 | static void | |
1996 | spider_net_tx_timeout(struct net_device *netdev) | |
1997 | { | |
1998 | struct spider_net_card *card; | |
1999 | ||
2000 | card = netdev_priv(netdev); | |
2001 | atomic_inc(&card->tx_timeout_task_counter); | |
2002 | if (netdev->flags & IFF_UP) | |
2003 | schedule_work(&card->tx_timeout_task); | |
2004 | else | |
2005 | atomic_dec(&card->tx_timeout_task_counter); | |
2006 | } | |
2007 | ||
2008 | /** | |
2009 | * spider_net_setup_netdev_ops - initialization of net_device operations | |
2010 | * @netdev: net_device structure | |
2011 | * | |
2012 | * fills out function pointers in the net_device structure | |
2013 | */ | |
2014 | static void | |
2015 | spider_net_setup_netdev_ops(struct net_device *netdev) | |
2016 | { | |
2017 | netdev->open = &spider_net_open; | |
2018 | netdev->stop = &spider_net_stop; | |
2019 | netdev->hard_start_xmit = &spider_net_xmit; | |
2020 | netdev->get_stats = &spider_net_get_stats; | |
2021 | netdev->set_multicast_list = &spider_net_set_multi; | |
2022 | netdev->set_mac_address = &spider_net_set_mac; | |
2023 | netdev->change_mtu = &spider_net_change_mtu; | |
2024 | netdev->do_ioctl = &spider_net_do_ioctl; | |
2025 | /* tx watchdog */ | |
2026 | netdev->tx_timeout = &spider_net_tx_timeout; | |
2027 | netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; | |
2028 | /* NAPI */ | |
2029 | netdev->poll = &spider_net_poll; | |
2030 | netdev->weight = SPIDER_NET_NAPI_WEIGHT; | |
2031 | /* HW VLAN */ | |
2032 | netdev->vlan_rx_register = &spider_net_vlan_rx_reg; | |
2033 | netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add; | |
2034 | netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill; | |
2035 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2036 | /* poll controller */ | |
2037 | netdev->poll_controller = &spider_net_poll_controller; | |
2038 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
2039 | /* ethtool ops */ | |
2040 | netdev->ethtool_ops = &spider_net_ethtool_ops; | |
2041 | } | |
2042 | ||
2043 | /** | |
2044 | * spider_net_setup_netdev - initialization of net_device | |
2045 | * @card: card structure | |
2046 | * | |
2047 | * Returns 0 on success or <0 on failure | |
2048 | * | |
2049 | * spider_net_setup_netdev initializes the net_device structure | |
2050 | **/ | |
2051 | static int | |
2052 | spider_net_setup_netdev(struct spider_net_card *card) | |
2053 | { | |
2054 | int result; | |
2055 | struct net_device *netdev = card->netdev; | |
2056 | struct device_node *dn; | |
2057 | struct sockaddr addr; | |
2058 | u8 *mac; | |
2059 | ||
2060 | SET_MODULE_OWNER(netdev); | |
2061 | SET_NETDEV_DEV(netdev, &card->pdev->dev); | |
2062 | ||
2063 | pci_set_drvdata(card->pdev, netdev); | |
2064 | spin_lock_init(&card->intmask_lock); | |
2065 | netdev->irq = card->pdev->irq; | |
2066 | ||
2067 | card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT; | |
2068 | ||
2069 | spider_net_setup_netdev_ops(netdev); | |
2070 | ||
2071 | netdev->features = 0; | |
2072 | /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | | |
2073 | * NETIF_F_HW_VLAN_FILTER */ | |
2074 | ||
2075 | netdev->irq = card->pdev->irq; | |
2076 | ||
2077 | dn = pci_device_to_OF_node(card->pdev); | |
543cec51 JO |
2078 | if (!dn) |
2079 | return -EIO; | |
2080 | ||
aaec0fab | 2081 | mac = (u8 *)get_property(dn, "local-mac-address", NULL); |
543cec51 JO |
2082 | if (!mac) |
2083 | return -EIO; | |
aaec0fab JO |
2084 | memcpy(addr.sa_data, mac, ETH_ALEN); |
2085 | ||
2086 | result = spider_net_set_mac(netdev, &addr); | |
2087 | if ((result) && (netif_msg_probe(card))) | |
2088 | pr_err("Failed to set MAC address: %i\n", result); | |
2089 | ||
2090 | result = register_netdev(netdev); | |
2091 | if (result) { | |
2092 | if (netif_msg_probe(card)) | |
2093 | pr_err("Couldn't register net_device: %i\n", | |
2094 | result); | |
2095 | return result; | |
2096 | } | |
2097 | ||
2098 | if (netif_msg_probe(card)) | |
2099 | pr_info("Initialized device %s.\n", netdev->name); | |
2100 | ||
2101 | return 0; | |
2102 | } | |
2103 | ||
2104 | /** | |
2105 | * spider_net_alloc_card - allocates net_device and card structure | |
2106 | * | |
2107 | * returns the card structure or NULL in case of errors | |
2108 | * | |
2109 | * the card and net_device structures are linked to each other | |
2110 | */ | |
2111 | static struct spider_net_card * | |
2112 | spider_net_alloc_card(void) | |
2113 | { | |
2114 | struct net_device *netdev; | |
2115 | struct spider_net_card *card; | |
2116 | size_t alloc_size; | |
2117 | ||
2118 | alloc_size = sizeof (*card) + | |
2119 | sizeof (struct spider_net_descr) * rx_descriptors + | |
2120 | sizeof (struct spider_net_descr) * tx_descriptors; | |
2121 | netdev = alloc_etherdev(alloc_size); | |
2122 | if (!netdev) | |
2123 | return NULL; | |
2124 | ||
2125 | card = netdev_priv(netdev); | |
2126 | card->netdev = netdev; | |
2127 | card->msg_enable = SPIDER_NET_DEFAULT_MSG; | |
2128 | INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev); | |
2129 | init_waitqueue_head(&card->waitq); | |
2130 | atomic_set(&card->tx_timeout_task_counter, 0); | |
2131 | ||
2132 | return card; | |
2133 | } | |
2134 | ||
2135 | /** | |
2136 | * spider_net_undo_pci_setup - releases PCI ressources | |
2137 | * @card: card structure | |
2138 | * | |
2139 | * spider_net_undo_pci_setup releases the mapped regions | |
2140 | */ | |
2141 | static void | |
2142 | spider_net_undo_pci_setup(struct spider_net_card *card) | |
2143 | { | |
2144 | iounmap(card->regs); | |
2145 | pci_release_regions(card->pdev); | |
2146 | } | |
2147 | ||
2148 | /** | |
2149 | * spider_net_setup_pci_dev - sets up the device in terms of PCI operations | |
2150 | * @card: card structure | |
2151 | * @pdev: PCI device | |
2152 | * | |
2153 | * Returns the card structure or NULL if any errors occur | |
2154 | * | |
2155 | * spider_net_setup_pci_dev initializes pdev and together with the | |
2156 | * functions called in spider_net_open configures the device so that | |
2157 | * data can be transferred over it | |
2158 | * The net_device structure is attached to the card structure, if the | |
2159 | * function returns without error. | |
2160 | **/ | |
2161 | static struct spider_net_card * | |
2162 | spider_net_setup_pci_dev(struct pci_dev *pdev) | |
2163 | { | |
2164 | struct spider_net_card *card; | |
2165 | unsigned long mmio_start, mmio_len; | |
2166 | ||
2167 | if (pci_enable_device(pdev)) { | |
2168 | pr_err("Couldn't enable PCI device\n"); | |
2169 | return NULL; | |
2170 | } | |
2171 | ||
2172 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
2173 | pr_err("Couldn't find proper PCI device base address.\n"); | |
2174 | goto out_disable_dev; | |
2175 | } | |
2176 | ||
2177 | if (pci_request_regions(pdev, spider_net_driver_name)) { | |
2178 | pr_err("Couldn't obtain PCI resources, aborting.\n"); | |
2179 | goto out_disable_dev; | |
2180 | } | |
2181 | ||
2182 | pci_set_master(pdev); | |
2183 | ||
2184 | card = spider_net_alloc_card(); | |
2185 | if (!card) { | |
2186 | pr_err("Couldn't allocate net_device structure, " | |
2187 | "aborting.\n"); | |
2188 | goto out_release_regions; | |
2189 | } | |
2190 | card->pdev = pdev; | |
2191 | ||
2192 | /* fetch base address and length of first resource */ | |
2193 | mmio_start = pci_resource_start(pdev, 0); | |
2194 | mmio_len = pci_resource_len(pdev, 0); | |
2195 | ||
2196 | card->netdev->mem_start = mmio_start; | |
2197 | card->netdev->mem_end = mmio_start + mmio_len; | |
2198 | card->regs = ioremap(mmio_start, mmio_len); | |
2199 | ||
2200 | if (!card->regs) { | |
2201 | pr_err("Couldn't obtain PCI resources, aborting.\n"); | |
2202 | goto out_release_regions; | |
2203 | } | |
2204 | ||
2205 | return card; | |
2206 | ||
2207 | out_release_regions: | |
2208 | pci_release_regions(pdev); | |
2209 | out_disable_dev: | |
2210 | pci_disable_device(pdev); | |
2211 | pci_set_drvdata(pdev, NULL); | |
2212 | return NULL; | |
2213 | } | |
2214 | ||
2215 | /** | |
2216 | * spider_net_probe - initialization of a device | |
2217 | * @pdev: PCI device | |
2218 | * @ent: entry in the device id list | |
2219 | * | |
2220 | * Returns 0 on success, <0 on failure | |
2221 | * | |
2222 | * spider_net_probe initializes pdev and registers a net_device | |
2223 | * structure for it. After that, the device can be ifconfig'ed up | |
2224 | **/ | |
2225 | static int __devinit | |
2226 | spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
2227 | { | |
2228 | int err = -EIO; | |
2229 | struct spider_net_card *card; | |
2230 | ||
2231 | card = spider_net_setup_pci_dev(pdev); | |
2232 | if (!card) | |
2233 | goto out; | |
2234 | ||
2235 | spider_net_workaround_rxramfull(card); | |
2236 | spider_net_init_card(card); | |
2237 | ||
2238 | err = spider_net_setup_phy(card); | |
2239 | if (err) | |
2240 | goto out_undo_pci; | |
2241 | ||
2242 | err = spider_net_init_firmware(card); | |
2243 | if (err) | |
2244 | goto out_undo_pci; | |
2245 | ||
2246 | err = spider_net_setup_netdev(card); | |
2247 | if (err) | |
2248 | goto out_undo_pci; | |
2249 | ||
2250 | return 0; | |
2251 | ||
2252 | out_undo_pci: | |
2253 | spider_net_undo_pci_setup(card); | |
2254 | free_netdev(card->netdev); | |
2255 | out: | |
2256 | return err; | |
2257 | } | |
2258 | ||
2259 | /** | |
2260 | * spider_net_remove - removal of a device | |
2261 | * @pdev: PCI device | |
2262 | * | |
2263 | * Returns 0 on success, <0 on failure | |
2264 | * | |
2265 | * spider_net_remove is called to remove the device and unregisters the | |
2266 | * net_device | |
2267 | **/ | |
2268 | static void __devexit | |
2269 | spider_net_remove(struct pci_dev *pdev) | |
2270 | { | |
2271 | struct net_device *netdev; | |
2272 | struct spider_net_card *card; | |
2273 | ||
2274 | netdev = pci_get_drvdata(pdev); | |
2275 | card = netdev_priv(netdev); | |
2276 | ||
2277 | wait_event(card->waitq, | |
2278 | atomic_read(&card->tx_timeout_task_counter) == 0); | |
2279 | ||
2280 | unregister_netdev(netdev); | |
543cec51 JO |
2281 | |
2282 | /* switch off card */ | |
2283 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2284 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2285 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2286 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2287 | ||
aaec0fab JO |
2288 | spider_net_undo_pci_setup(card); |
2289 | free_netdev(netdev); | |
aaec0fab JO |
2290 | } |
2291 | ||
2292 | static struct pci_driver spider_net_driver = { | |
aaec0fab JO |
2293 | .name = spider_net_driver_name, |
2294 | .id_table = spider_net_pci_tbl, | |
2295 | .probe = spider_net_probe, | |
2296 | .remove = __devexit_p(spider_net_remove) | |
2297 | }; | |
2298 | ||
2299 | /** | |
2300 | * spider_net_init - init function when the driver is loaded | |
2301 | * | |
2302 | * spider_net_init registers the device driver | |
2303 | */ | |
2304 | static int __init spider_net_init(void) | |
2305 | { | |
2306 | if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { | |
2307 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; | |
2308 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2309 | } | |
2310 | if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { | |
2311 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; | |
2312 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2313 | } | |
2314 | if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { | |
2315 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; | |
2316 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2317 | } | |
2318 | if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { | |
2319 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; | |
2320 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2321 | } | |
2322 | ||
2323 | return pci_register_driver(&spider_net_driver); | |
2324 | } | |
2325 | ||
2326 | /** | |
2327 | * spider_net_cleanup - exit function when driver is unloaded | |
2328 | * | |
2329 | * spider_net_cleanup unregisters the device driver | |
2330 | */ | |
2331 | static void __exit spider_net_cleanup(void) | |
2332 | { | |
2333 | pci_unregister_driver(&spider_net_driver); | |
2334 | } | |
2335 | ||
2336 | module_init(spider_net_init); | |
2337 | module_exit(spider_net_cleanup); |