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1 | /* | |
2 | * Network device driver for Cell Processor-Based Blade and Celleb platform | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2005 | |
5 | * (C) Copyright 2006 TOSHIBA CORPORATION | |
6 | * | |
7 | * Authors : Utz Bacher <utz.bacher@de.ibm.com> | |
8 | * Jens Osterkamp <Jens.Osterkamp@de.ibm.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2, or (at your option) | |
13 | * any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | */ | |
24 | ||
25 | #include <linux/compiler.h> | |
26 | #include <linux/crc32.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/ethtool.h> | |
30 | #include <linux/firmware.h> | |
31 | #include <linux/if_vlan.h> | |
32 | #include <linux/in.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/gfp.h> | |
35 | #include <linux/ioport.h> | |
36 | #include <linux/ip.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/mii.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/netdevice.h> | |
41 | #include <linux/device.h> | |
42 | #include <linux/pci.h> | |
43 | #include <linux/skbuff.h> | |
44 | #include <linux/tcp.h> | |
45 | #include <linux/types.h> | |
46 | #include <linux/vmalloc.h> | |
47 | #include <linux/wait.h> | |
48 | #include <linux/workqueue.h> | |
49 | #include <linux/bitops.h> | |
50 | #include <asm/pci-bridge.h> | |
51 | #include <net/checksum.h> | |
52 | ||
53 | #include "spider_net.h" | |
54 | ||
55 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ | |
56 | "<Jens.Osterkamp@de.ibm.com>"); | |
57 | MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); | |
58 | MODULE_LICENSE("GPL"); | |
59 | MODULE_VERSION(VERSION); | |
60 | MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME); | |
61 | ||
62 | static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; | |
63 | static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; | |
64 | ||
65 | module_param(rx_descriptors, int, 0444); | |
66 | module_param(tx_descriptors, int, 0444); | |
67 | ||
68 | MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ | |
69 | "in rx chains"); | |
70 | MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ | |
71 | "in tx chain"); | |
72 | ||
73 | char spider_net_driver_name[] = "spidernet"; | |
74 | ||
75 | static DEFINE_PCI_DEVICE_TABLE(spider_net_pci_tbl) = { | |
76 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, | |
77 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, | |
78 | { 0, } | |
79 | }; | |
80 | ||
81 | MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); | |
82 | ||
83 | /** | |
84 | * spider_net_read_reg - reads an SMMIO register of a card | |
85 | * @card: device structure | |
86 | * @reg: register to read from | |
87 | * | |
88 | * returns the content of the specified SMMIO register. | |
89 | */ | |
90 | static inline u32 | |
91 | spider_net_read_reg(struct spider_net_card *card, u32 reg) | |
92 | { | |
93 | /* We use the powerpc specific variants instead of readl_be() because | |
94 | * we know spidernet is not a real PCI device and we can thus avoid the | |
95 | * performance hit caused by the PCI workarounds. | |
96 | */ | |
97 | return in_be32(card->regs + reg); | |
98 | } | |
99 | ||
100 | /** | |
101 | * spider_net_write_reg - writes to an SMMIO register of a card | |
102 | * @card: device structure | |
103 | * @reg: register to write to | |
104 | * @value: value to write into the specified SMMIO register | |
105 | */ | |
106 | static inline void | |
107 | spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) | |
108 | { | |
109 | /* We use the powerpc specific variants instead of writel_be() because | |
110 | * we know spidernet is not a real PCI device and we can thus avoid the | |
111 | * performance hit caused by the PCI workarounds. | |
112 | */ | |
113 | out_be32(card->regs + reg, value); | |
114 | } | |
115 | ||
116 | /** spider_net_write_phy - write to phy register | |
117 | * @netdev: adapter to be written to | |
118 | * @mii_id: id of MII | |
119 | * @reg: PHY register | |
120 | * @val: value to be written to phy register | |
121 | * | |
122 | * spider_net_write_phy_register writes to an arbitrary PHY | |
123 | * register via the spider GPCWOPCMD register. We assume the queue does | |
124 | * not run full (not more than 15 commands outstanding). | |
125 | **/ | |
126 | static void | |
127 | spider_net_write_phy(struct net_device *netdev, int mii_id, | |
128 | int reg, int val) | |
129 | { | |
130 | struct spider_net_card *card = netdev_priv(netdev); | |
131 | u32 writevalue; | |
132 | ||
133 | writevalue = ((u32)mii_id << 21) | | |
134 | ((u32)reg << 16) | ((u32)val); | |
135 | ||
136 | spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); | |
137 | } | |
138 | ||
139 | /** spider_net_read_phy - read from phy register | |
140 | * @netdev: network device to be read from | |
141 | * @mii_id: id of MII | |
142 | * @reg: PHY register | |
143 | * | |
144 | * Returns value read from PHY register | |
145 | * | |
146 | * spider_net_write_phy reads from an arbitrary PHY | |
147 | * register via the spider GPCROPCMD register | |
148 | **/ | |
149 | static int | |
150 | spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) | |
151 | { | |
152 | struct spider_net_card *card = netdev_priv(netdev); | |
153 | u32 readvalue; | |
154 | ||
155 | readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); | |
156 | spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); | |
157 | ||
158 | /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT | |
159 | * interrupt, as we poll for the completion of the read operation | |
160 | * in spider_net_read_phy. Should take about 50 us */ | |
161 | do { | |
162 | readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); | |
163 | } while (readvalue & SPIDER_NET_GPREXEC); | |
164 | ||
165 | readvalue &= SPIDER_NET_GPRDAT_MASK; | |
166 | ||
167 | return readvalue; | |
168 | } | |
169 | ||
170 | /** | |
171 | * spider_net_setup_aneg - initial auto-negotiation setup | |
172 | * @card: device structure | |
173 | **/ | |
174 | static void | |
175 | spider_net_setup_aneg(struct spider_net_card *card) | |
176 | { | |
177 | struct mii_phy *phy = &card->phy; | |
178 | u32 advertise = 0; | |
179 | u16 bmsr, estat; | |
180 | ||
181 | bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); | |
182 | estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); | |
183 | ||
184 | if (bmsr & BMSR_10HALF) | |
185 | advertise |= ADVERTISED_10baseT_Half; | |
186 | if (bmsr & BMSR_10FULL) | |
187 | advertise |= ADVERTISED_10baseT_Full; | |
188 | if (bmsr & BMSR_100HALF) | |
189 | advertise |= ADVERTISED_100baseT_Half; | |
190 | if (bmsr & BMSR_100FULL) | |
191 | advertise |= ADVERTISED_100baseT_Full; | |
192 | ||
193 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) | |
194 | advertise |= SUPPORTED_1000baseT_Full; | |
195 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) | |
196 | advertise |= SUPPORTED_1000baseT_Half; | |
197 | ||
198 | mii_phy_probe(phy, phy->mii_id); | |
199 | phy->def->ops->setup_aneg(phy, advertise); | |
200 | ||
201 | } | |
202 | ||
203 | /** | |
204 | * spider_net_rx_irq_off - switch off rx irq on this spider card | |
205 | * @card: device structure | |
206 | * | |
207 | * switches off rx irq by masking them out in the GHIINTnMSK register | |
208 | */ | |
209 | static void | |
210 | spider_net_rx_irq_off(struct spider_net_card *card) | |
211 | { | |
212 | u32 regvalue; | |
213 | ||
214 | regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); | |
215 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
216 | } | |
217 | ||
218 | /** | |
219 | * spider_net_rx_irq_on - switch on rx irq on this spider card | |
220 | * @card: device structure | |
221 | * | |
222 | * switches on rx irq by enabling them in the GHIINTnMSK register | |
223 | */ | |
224 | static void | |
225 | spider_net_rx_irq_on(struct spider_net_card *card) | |
226 | { | |
227 | u32 regvalue; | |
228 | ||
229 | regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; | |
230 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
231 | } | |
232 | ||
233 | /** | |
234 | * spider_net_set_promisc - sets the unicast address or the promiscuous mode | |
235 | * @card: card structure | |
236 | * | |
237 | * spider_net_set_promisc sets the unicast destination address filter and | |
238 | * thus either allows for non-promisc mode or promisc mode | |
239 | */ | |
240 | static void | |
241 | spider_net_set_promisc(struct spider_net_card *card) | |
242 | { | |
243 | u32 macu, macl; | |
244 | struct net_device *netdev = card->netdev; | |
245 | ||
246 | if (netdev->flags & IFF_PROMISC) { | |
247 | /* clear destination entry 0 */ | |
248 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); | |
249 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); | |
250 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
251 | SPIDER_NET_PROMISC_VALUE); | |
252 | } else { | |
253 | macu = netdev->dev_addr[0]; | |
254 | macu <<= 8; | |
255 | macu |= netdev->dev_addr[1]; | |
256 | memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); | |
257 | ||
258 | macu |= SPIDER_NET_UA_DESCR_VALUE; | |
259 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); | |
260 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); | |
261 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
262 | SPIDER_NET_NONPROMISC_VALUE); | |
263 | } | |
264 | } | |
265 | ||
266 | /** | |
267 | * spider_net_get_mac_address - read mac address from spider card | |
268 | * @card: device structure | |
269 | * | |
270 | * reads MAC address from GMACUNIMACU and GMACUNIMACL registers | |
271 | */ | |
272 | static int | |
273 | spider_net_get_mac_address(struct net_device *netdev) | |
274 | { | |
275 | struct spider_net_card *card = netdev_priv(netdev); | |
276 | u32 macl, macu; | |
277 | ||
278 | macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL); | |
279 | macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU); | |
280 | ||
281 | netdev->dev_addr[0] = (macu >> 24) & 0xff; | |
282 | netdev->dev_addr[1] = (macu >> 16) & 0xff; | |
283 | netdev->dev_addr[2] = (macu >> 8) & 0xff; | |
284 | netdev->dev_addr[3] = macu & 0xff; | |
285 | netdev->dev_addr[4] = (macl >> 8) & 0xff; | |
286 | netdev->dev_addr[5] = macl & 0xff; | |
287 | ||
288 | if (!is_valid_ether_addr(&netdev->dev_addr[0])) | |
289 | return -EINVAL; | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | /** | |
295 | * spider_net_get_descr_status -- returns the status of a descriptor | |
296 | * @descr: descriptor to look at | |
297 | * | |
298 | * returns the status as in the dmac_cmd_status field of the descriptor | |
299 | */ | |
300 | static inline int | |
301 | spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) | |
302 | { | |
303 | return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; | |
304 | } | |
305 | ||
306 | /** | |
307 | * spider_net_free_chain - free descriptor chain | |
308 | * @card: card structure | |
309 | * @chain: address of chain | |
310 | * | |
311 | */ | |
312 | static void | |
313 | spider_net_free_chain(struct spider_net_card *card, | |
314 | struct spider_net_descr_chain *chain) | |
315 | { | |
316 | struct spider_net_descr *descr; | |
317 | ||
318 | descr = chain->ring; | |
319 | do { | |
320 | descr->bus_addr = 0; | |
321 | descr->hwdescr->next_descr_addr = 0; | |
322 | descr = descr->next; | |
323 | } while (descr != chain->ring); | |
324 | ||
325 | dma_free_coherent(&card->pdev->dev, chain->num_desc, | |
326 | chain->hwring, chain->dma_addr); | |
327 | } | |
328 | ||
329 | /** | |
330 | * spider_net_init_chain - alloc and link descriptor chain | |
331 | * @card: card structure | |
332 | * @chain: address of chain | |
333 | * | |
334 | * We manage a circular list that mirrors the hardware structure, | |
335 | * except that the hardware uses bus addresses. | |
336 | * | |
337 | * Returns 0 on success, <0 on failure | |
338 | */ | |
339 | static int | |
340 | spider_net_init_chain(struct spider_net_card *card, | |
341 | struct spider_net_descr_chain *chain) | |
342 | { | |
343 | int i; | |
344 | struct spider_net_descr *descr; | |
345 | struct spider_net_hw_descr *hwdescr; | |
346 | dma_addr_t buf; | |
347 | size_t alloc_size; | |
348 | ||
349 | alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); | |
350 | ||
351 | chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, | |
352 | &chain->dma_addr, GFP_KERNEL); | |
353 | ||
354 | if (!chain->hwring) | |
355 | return -ENOMEM; | |
356 | ||
357 | memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr)); | |
358 | ||
359 | /* Set up the hardware pointers in each descriptor */ | |
360 | descr = chain->ring; | |
361 | hwdescr = chain->hwring; | |
362 | buf = chain->dma_addr; | |
363 | for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { | |
364 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; | |
365 | hwdescr->next_descr_addr = 0; | |
366 | ||
367 | descr->hwdescr = hwdescr; | |
368 | descr->bus_addr = buf; | |
369 | descr->next = descr + 1; | |
370 | descr->prev = descr - 1; | |
371 | ||
372 | buf += sizeof(struct spider_net_hw_descr); | |
373 | } | |
374 | /* do actual circular list */ | |
375 | (descr-1)->next = chain->ring; | |
376 | chain->ring->prev = descr-1; | |
377 | ||
378 | spin_lock_init(&chain->lock); | |
379 | chain->head = chain->ring; | |
380 | chain->tail = chain->ring; | |
381 | return 0; | |
382 | } | |
383 | ||
384 | /** | |
385 | * spider_net_free_rx_chain_contents - frees descr contents in rx chain | |
386 | * @card: card structure | |
387 | * | |
388 | * returns 0 on success, <0 on failure | |
389 | */ | |
390 | static void | |
391 | spider_net_free_rx_chain_contents(struct spider_net_card *card) | |
392 | { | |
393 | struct spider_net_descr *descr; | |
394 | ||
395 | descr = card->rx_chain.head; | |
396 | do { | |
397 | if (descr->skb) { | |
398 | pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, | |
399 | SPIDER_NET_MAX_FRAME, | |
400 | PCI_DMA_BIDIRECTIONAL); | |
401 | dev_kfree_skb(descr->skb); | |
402 | descr->skb = NULL; | |
403 | } | |
404 | descr = descr->next; | |
405 | } while (descr != card->rx_chain.head); | |
406 | } | |
407 | ||
408 | /** | |
409 | * spider_net_prepare_rx_descr - Reinitialize RX descriptor | |
410 | * @card: card structure | |
411 | * @descr: descriptor to re-init | |
412 | * | |
413 | * Return 0 on success, <0 on failure. | |
414 | * | |
415 | * Allocates a new rx skb, iommu-maps it and attaches it to the | |
416 | * descriptor. Mark the descriptor as activated, ready-to-use. | |
417 | */ | |
418 | static int | |
419 | spider_net_prepare_rx_descr(struct spider_net_card *card, | |
420 | struct spider_net_descr *descr) | |
421 | { | |
422 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; | |
423 | dma_addr_t buf; | |
424 | int offset; | |
425 | int bufsize; | |
426 | ||
427 | /* we need to round up the buffer size to a multiple of 128 */ | |
428 | bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & | |
429 | (~(SPIDER_NET_RXBUF_ALIGN - 1)); | |
430 | ||
431 | /* and we need to have it 128 byte aligned, therefore we allocate a | |
432 | * bit more */ | |
433 | /* allocate an skb */ | |
434 | descr->skb = netdev_alloc_skb(card->netdev, | |
435 | bufsize + SPIDER_NET_RXBUF_ALIGN - 1); | |
436 | if (!descr->skb) { | |
437 | if (netif_msg_rx_err(card) && net_ratelimit()) | |
438 | dev_err(&card->netdev->dev, | |
439 | "Not enough memory to allocate rx buffer\n"); | |
440 | card->spider_stats.alloc_rx_skb_error++; | |
441 | return -ENOMEM; | |
442 | } | |
443 | hwdescr->buf_size = bufsize; | |
444 | hwdescr->result_size = 0; | |
445 | hwdescr->valid_size = 0; | |
446 | hwdescr->data_status = 0; | |
447 | hwdescr->data_error = 0; | |
448 | ||
449 | offset = ((unsigned long)descr->skb->data) & | |
450 | (SPIDER_NET_RXBUF_ALIGN - 1); | |
451 | if (offset) | |
452 | skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); | |
453 | /* iommu-map the skb */ | |
454 | buf = pci_map_single(card->pdev, descr->skb->data, | |
455 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); | |
456 | if (pci_dma_mapping_error(card->pdev, buf)) { | |
457 | dev_kfree_skb_any(descr->skb); | |
458 | descr->skb = NULL; | |
459 | if (netif_msg_rx_err(card) && net_ratelimit()) | |
460 | dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n"); | |
461 | card->spider_stats.rx_iommu_map_error++; | |
462 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; | |
463 | } else { | |
464 | hwdescr->buf_addr = buf; | |
465 | wmb(); | |
466 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | | |
467 | SPIDER_NET_DMAC_NOINTR_COMPLETE; | |
468 | } | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | /** | |
474 | * spider_net_enable_rxchtails - sets RX dmac chain tail addresses | |
475 | * @card: card structure | |
476 | * | |
477 | * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the | |
478 | * chip by writing to the appropriate register. DMA is enabled in | |
479 | * spider_net_enable_rxdmac. | |
480 | */ | |
481 | static inline void | |
482 | spider_net_enable_rxchtails(struct spider_net_card *card) | |
483 | { | |
484 | /* assume chain is aligned correctly */ | |
485 | spider_net_write_reg(card, SPIDER_NET_GDADCHA , | |
486 | card->rx_chain.tail->bus_addr); | |
487 | } | |
488 | ||
489 | /** | |
490 | * spider_net_enable_rxdmac - enables a receive DMA controller | |
491 | * @card: card structure | |
492 | * | |
493 | * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN | |
494 | * in the GDADMACCNTR register | |
495 | */ | |
496 | static inline void | |
497 | spider_net_enable_rxdmac(struct spider_net_card *card) | |
498 | { | |
499 | wmb(); | |
500 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
501 | SPIDER_NET_DMA_RX_VALUE); | |
502 | } | |
503 | ||
504 | /** | |
505 | * spider_net_disable_rxdmac - disables the receive DMA controller | |
506 | * @card: card structure | |
507 | * | |
508 | * spider_net_disable_rxdmac terminates processing on the DMA controller | |
509 | * by turing off the DMA controller, with the force-end flag set. | |
510 | */ | |
511 | static inline void | |
512 | spider_net_disable_rxdmac(struct spider_net_card *card) | |
513 | { | |
514 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
515 | SPIDER_NET_DMA_RX_FEND_VALUE); | |
516 | } | |
517 | ||
518 | /** | |
519 | * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains | |
520 | * @card: card structure | |
521 | * | |
522 | * refills descriptors in the rx chain: allocates skbs and iommu-maps them. | |
523 | */ | |
524 | static void | |
525 | spider_net_refill_rx_chain(struct spider_net_card *card) | |
526 | { | |
527 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
528 | unsigned long flags; | |
529 | ||
530 | /* one context doing the refill (and a second context seeing that | |
531 | * and omitting it) is ok. If called by NAPI, we'll be called again | |
532 | * as spider_net_decode_one_descr is called several times. If some | |
533 | * interrupt calls us, the NAPI is about to clean up anyway. */ | |
534 | if (!spin_trylock_irqsave(&chain->lock, flags)) | |
535 | return; | |
536 | ||
537 | while (spider_net_get_descr_status(chain->head->hwdescr) == | |
538 | SPIDER_NET_DESCR_NOT_IN_USE) { | |
539 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
540 | break; | |
541 | chain->head = chain->head->next; | |
542 | } | |
543 | ||
544 | spin_unlock_irqrestore(&chain->lock, flags); | |
545 | } | |
546 | ||
547 | /** | |
548 | * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains | |
549 | * @card: card structure | |
550 | * | |
551 | * Returns 0 on success, <0 on failure. | |
552 | */ | |
553 | static int | |
554 | spider_net_alloc_rx_skbs(struct spider_net_card *card) | |
555 | { | |
556 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
557 | struct spider_net_descr *start = chain->tail; | |
558 | struct spider_net_descr *descr = start; | |
559 | ||
560 | /* Link up the hardware chain pointers */ | |
561 | do { | |
562 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; | |
563 | descr = descr->next; | |
564 | } while (descr != start); | |
565 | ||
566 | /* Put at least one buffer into the chain. if this fails, | |
567 | * we've got a problem. If not, spider_net_refill_rx_chain | |
568 | * will do the rest at the end of this function. */ | |
569 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
570 | goto error; | |
571 | else | |
572 | chain->head = chain->head->next; | |
573 | ||
574 | /* This will allocate the rest of the rx buffers; | |
575 | * if not, it's business as usual later on. */ | |
576 | spider_net_refill_rx_chain(card); | |
577 | spider_net_enable_rxdmac(card); | |
578 | return 0; | |
579 | ||
580 | error: | |
581 | spider_net_free_rx_chain_contents(card); | |
582 | return -ENOMEM; | |
583 | } | |
584 | ||
585 | /** | |
586 | * spider_net_get_multicast_hash - generates hash for multicast filter table | |
587 | * @addr: multicast address | |
588 | * | |
589 | * returns the hash value. | |
590 | * | |
591 | * spider_net_get_multicast_hash calculates a hash value for a given multicast | |
592 | * address, that is used to set the multicast filter tables | |
593 | */ | |
594 | static u8 | |
595 | spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) | |
596 | { | |
597 | u32 crc; | |
598 | u8 hash; | |
599 | char addr_for_crc[ETH_ALEN] = { 0, }; | |
600 | int i, bit; | |
601 | ||
602 | for (i = 0; i < ETH_ALEN * 8; i++) { | |
603 | bit = (addr[i / 8] >> (i % 8)) & 1; | |
604 | addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); | |
605 | } | |
606 | ||
607 | crc = crc32_be(~0, addr_for_crc, netdev->addr_len); | |
608 | ||
609 | hash = (crc >> 27); | |
610 | hash <<= 3; | |
611 | hash |= crc & 7; | |
612 | hash &= 0xff; | |
613 | ||
614 | return hash; | |
615 | } | |
616 | ||
617 | /** | |
618 | * spider_net_set_multi - sets multicast addresses and promisc flags | |
619 | * @netdev: interface device structure | |
620 | * | |
621 | * spider_net_set_multi configures multicast addresses as needed for the | |
622 | * netdev interface. It also sets up multicast, allmulti and promisc | |
623 | * flags appropriately | |
624 | */ | |
625 | static void | |
626 | spider_net_set_multi(struct net_device *netdev) | |
627 | { | |
628 | struct dev_mc_list *mc; | |
629 | u8 hash; | |
630 | int i; | |
631 | u32 reg; | |
632 | struct spider_net_card *card = netdev_priv(netdev); | |
633 | unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = | |
634 | {0, }; | |
635 | ||
636 | spider_net_set_promisc(card); | |
637 | ||
638 | if (netdev->flags & IFF_ALLMULTI) { | |
639 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { | |
640 | set_bit(i, bitmask); | |
641 | } | |
642 | goto write_hash; | |
643 | } | |
644 | ||
645 | /* well, we know, what the broadcast hash value is: it's xfd | |
646 | hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ | |
647 | set_bit(0xfd, bitmask); | |
648 | ||
649 | netdev_for_each_mc_addr(mc, netdev) { | |
650 | hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr); | |
651 | set_bit(hash, bitmask); | |
652 | } | |
653 | ||
654 | write_hash: | |
655 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { | |
656 | reg = 0; | |
657 | if (test_bit(i * 4, bitmask)) | |
658 | reg += 0x08; | |
659 | reg <<= 8; | |
660 | if (test_bit(i * 4 + 1, bitmask)) | |
661 | reg += 0x08; | |
662 | reg <<= 8; | |
663 | if (test_bit(i * 4 + 2, bitmask)) | |
664 | reg += 0x08; | |
665 | reg <<= 8; | |
666 | if (test_bit(i * 4 + 3, bitmask)) | |
667 | reg += 0x08; | |
668 | ||
669 | spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); | |
670 | } | |
671 | } | |
672 | ||
673 | /** | |
674 | * spider_net_prepare_tx_descr - fill tx descriptor with skb data | |
675 | * @card: card structure | |
676 | * @skb: packet to use | |
677 | * | |
678 | * returns 0 on success, <0 on failure. | |
679 | * | |
680 | * fills out the descriptor structure with skb data and len. Copies data, | |
681 | * if needed (32bit DMA!) | |
682 | */ | |
683 | static int | |
684 | spider_net_prepare_tx_descr(struct spider_net_card *card, | |
685 | struct sk_buff *skb) | |
686 | { | |
687 | struct spider_net_descr_chain *chain = &card->tx_chain; | |
688 | struct spider_net_descr *descr; | |
689 | struct spider_net_hw_descr *hwdescr; | |
690 | dma_addr_t buf; | |
691 | unsigned long flags; | |
692 | ||
693 | buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); | |
694 | if (pci_dma_mapping_error(card->pdev, buf)) { | |
695 | if (netif_msg_tx_err(card) && net_ratelimit()) | |
696 | dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). " | |
697 | "Dropping packet\n", skb->data, skb->len); | |
698 | card->spider_stats.tx_iommu_map_error++; | |
699 | return -ENOMEM; | |
700 | } | |
701 | ||
702 | spin_lock_irqsave(&chain->lock, flags); | |
703 | descr = card->tx_chain.head; | |
704 | if (descr->next == chain->tail->prev) { | |
705 | spin_unlock_irqrestore(&chain->lock, flags); | |
706 | pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); | |
707 | return -ENOMEM; | |
708 | } | |
709 | hwdescr = descr->hwdescr; | |
710 | chain->head = descr->next; | |
711 | ||
712 | descr->skb = skb; | |
713 | hwdescr->buf_addr = buf; | |
714 | hwdescr->buf_size = skb->len; | |
715 | hwdescr->next_descr_addr = 0; | |
716 | hwdescr->data_status = 0; | |
717 | ||
718 | hwdescr->dmac_cmd_status = | |
719 | SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL; | |
720 | spin_unlock_irqrestore(&chain->lock, flags); | |
721 | ||
722 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
723 | switch (ip_hdr(skb)->protocol) { | |
724 | case IPPROTO_TCP: | |
725 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; | |
726 | break; | |
727 | case IPPROTO_UDP: | |
728 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; | |
729 | break; | |
730 | } | |
731 | ||
732 | /* Chain the bus address, so that the DMA engine finds this descr. */ | |
733 | wmb(); | |
734 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; | |
735 | ||
736 | card->netdev->trans_start = jiffies; /* set netdev watchdog timer */ | |
737 | return 0; | |
738 | } | |
739 | ||
740 | static int | |
741 | spider_net_set_low_watermark(struct spider_net_card *card) | |
742 | { | |
743 | struct spider_net_descr *descr = card->tx_chain.tail; | |
744 | struct spider_net_hw_descr *hwdescr; | |
745 | unsigned long flags; | |
746 | int status; | |
747 | int cnt=0; | |
748 | int i; | |
749 | ||
750 | /* Measure the length of the queue. Measurement does not | |
751 | * need to be precise -- does not need a lock. */ | |
752 | while (descr != card->tx_chain.head) { | |
753 | status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; | |
754 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) | |
755 | break; | |
756 | descr = descr->next; | |
757 | cnt++; | |
758 | } | |
759 | ||
760 | /* If TX queue is short, don't even bother with interrupts */ | |
761 | if (cnt < card->tx_chain.num_desc/4) | |
762 | return cnt; | |
763 | ||
764 | /* Set low-watermark 3/4th's of the way into the queue. */ | |
765 | descr = card->tx_chain.tail; | |
766 | cnt = (cnt*3)/4; | |
767 | for (i=0;i<cnt; i++) | |
768 | descr = descr->next; | |
769 | ||
770 | /* Set the new watermark, clear the old watermark */ | |
771 | spin_lock_irqsave(&card->tx_chain.lock, flags); | |
772 | descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; | |
773 | if (card->low_watermark && card->low_watermark != descr) { | |
774 | hwdescr = card->low_watermark->hwdescr; | |
775 | hwdescr->dmac_cmd_status = | |
776 | hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; | |
777 | } | |
778 | card->low_watermark = descr; | |
779 | spin_unlock_irqrestore(&card->tx_chain.lock, flags); | |
780 | return cnt; | |
781 | } | |
782 | ||
783 | /** | |
784 | * spider_net_release_tx_chain - processes sent tx descriptors | |
785 | * @card: adapter structure | |
786 | * @brutal: if set, don't care about whether descriptor seems to be in use | |
787 | * | |
788 | * returns 0 if the tx ring is empty, otherwise 1. | |
789 | * | |
790 | * spider_net_release_tx_chain releases the tx descriptors that spider has | |
791 | * finished with (if non-brutal) or simply release tx descriptors (if brutal). | |
792 | * If some other context is calling this function, we return 1 so that we're | |
793 | * scheduled again (if we were scheduled) and will not lose initiative. | |
794 | */ | |
795 | static int | |
796 | spider_net_release_tx_chain(struct spider_net_card *card, int brutal) | |
797 | { | |
798 | struct net_device *dev = card->netdev; | |
799 | struct spider_net_descr_chain *chain = &card->tx_chain; | |
800 | struct spider_net_descr *descr; | |
801 | struct spider_net_hw_descr *hwdescr; | |
802 | struct sk_buff *skb; | |
803 | u32 buf_addr; | |
804 | unsigned long flags; | |
805 | int status; | |
806 | ||
807 | while (1) { | |
808 | spin_lock_irqsave(&chain->lock, flags); | |
809 | if (chain->tail == chain->head) { | |
810 | spin_unlock_irqrestore(&chain->lock, flags); | |
811 | return 0; | |
812 | } | |
813 | descr = chain->tail; | |
814 | hwdescr = descr->hwdescr; | |
815 | ||
816 | status = spider_net_get_descr_status(hwdescr); | |
817 | switch (status) { | |
818 | case SPIDER_NET_DESCR_COMPLETE: | |
819 | dev->stats.tx_packets++; | |
820 | dev->stats.tx_bytes += descr->skb->len; | |
821 | break; | |
822 | ||
823 | case SPIDER_NET_DESCR_CARDOWNED: | |
824 | if (!brutal) { | |
825 | spin_unlock_irqrestore(&chain->lock, flags); | |
826 | return 1; | |
827 | } | |
828 | ||
829 | /* fallthrough, if we release the descriptors | |
830 | * brutally (then we don't care about | |
831 | * SPIDER_NET_DESCR_CARDOWNED) */ | |
832 | ||
833 | case SPIDER_NET_DESCR_RESPONSE_ERROR: | |
834 | case SPIDER_NET_DESCR_PROTECTION_ERROR: | |
835 | case SPIDER_NET_DESCR_FORCE_END: | |
836 | if (netif_msg_tx_err(card)) | |
837 | dev_err(&card->netdev->dev, "forcing end of tx descriptor " | |
838 | "with status x%02x\n", status); | |
839 | dev->stats.tx_errors++; | |
840 | break; | |
841 | ||
842 | default: | |
843 | dev->stats.tx_dropped++; | |
844 | if (!brutal) { | |
845 | spin_unlock_irqrestore(&chain->lock, flags); | |
846 | return 1; | |
847 | } | |
848 | } | |
849 | ||
850 | chain->tail = descr->next; | |
851 | hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; | |
852 | skb = descr->skb; | |
853 | descr->skb = NULL; | |
854 | buf_addr = hwdescr->buf_addr; | |
855 | spin_unlock_irqrestore(&chain->lock, flags); | |
856 | ||
857 | /* unmap the skb */ | |
858 | if (skb) { | |
859 | pci_unmap_single(card->pdev, buf_addr, skb->len, | |
860 | PCI_DMA_TODEVICE); | |
861 | dev_kfree_skb(skb); | |
862 | } | |
863 | } | |
864 | return 0; | |
865 | } | |
866 | ||
867 | /** | |
868 | * spider_net_kick_tx_dma - enables TX DMA processing | |
869 | * @card: card structure | |
870 | * | |
871 | * This routine will start the transmit DMA running if | |
872 | * it is not already running. This routine ned only be | |
873 | * called when queueing a new packet to an empty tx queue. | |
874 | * Writes the current tx chain head as start address | |
875 | * of the tx descriptor chain and enables the transmission | |
876 | * DMA engine. | |
877 | */ | |
878 | static inline void | |
879 | spider_net_kick_tx_dma(struct spider_net_card *card) | |
880 | { | |
881 | struct spider_net_descr *descr; | |
882 | ||
883 | if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & | |
884 | SPIDER_NET_TX_DMA_EN) | |
885 | goto out; | |
886 | ||
887 | descr = card->tx_chain.tail; | |
888 | for (;;) { | |
889 | if (spider_net_get_descr_status(descr->hwdescr) == | |
890 | SPIDER_NET_DESCR_CARDOWNED) { | |
891 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
892 | descr->bus_addr); | |
893 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
894 | SPIDER_NET_DMA_TX_VALUE); | |
895 | break; | |
896 | } | |
897 | if (descr == card->tx_chain.head) | |
898 | break; | |
899 | descr = descr->next; | |
900 | } | |
901 | ||
902 | out: | |
903 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); | |
904 | } | |
905 | ||
906 | /** | |
907 | * spider_net_xmit - transmits a frame over the device | |
908 | * @skb: packet to send out | |
909 | * @netdev: interface device structure | |
910 | * | |
911 | * returns 0 on success, !0 on failure | |
912 | */ | |
913 | static int | |
914 | spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) | |
915 | { | |
916 | int cnt; | |
917 | struct spider_net_card *card = netdev_priv(netdev); | |
918 | ||
919 | spider_net_release_tx_chain(card, 0); | |
920 | ||
921 | if (spider_net_prepare_tx_descr(card, skb) != 0) { | |
922 | netdev->stats.tx_dropped++; | |
923 | netif_stop_queue(netdev); | |
924 | return NETDEV_TX_BUSY; | |
925 | } | |
926 | ||
927 | cnt = spider_net_set_low_watermark(card); | |
928 | if (cnt < 5) | |
929 | spider_net_kick_tx_dma(card); | |
930 | return NETDEV_TX_OK; | |
931 | } | |
932 | ||
933 | /** | |
934 | * spider_net_cleanup_tx_ring - cleans up the TX ring | |
935 | * @card: card structure | |
936 | * | |
937 | * spider_net_cleanup_tx_ring is called by either the tx_timer | |
938 | * or from the NAPI polling routine. | |
939 | * This routine releases resources associted with transmitted | |
940 | * packets, including updating the queue tail pointer. | |
941 | */ | |
942 | static void | |
943 | spider_net_cleanup_tx_ring(struct spider_net_card *card) | |
944 | { | |
945 | if ((spider_net_release_tx_chain(card, 0) != 0) && | |
946 | (card->netdev->flags & IFF_UP)) { | |
947 | spider_net_kick_tx_dma(card); | |
948 | netif_wake_queue(card->netdev); | |
949 | } | |
950 | } | |
951 | ||
952 | /** | |
953 | * spider_net_do_ioctl - called for device ioctls | |
954 | * @netdev: interface device structure | |
955 | * @ifr: request parameter structure for ioctl | |
956 | * @cmd: command code for ioctl | |
957 | * | |
958 | * returns 0 on success, <0 on failure. Currently, we have no special ioctls. | |
959 | * -EOPNOTSUPP is returned, if an unknown ioctl was requested | |
960 | */ | |
961 | static int | |
962 | spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
963 | { | |
964 | switch (cmd) { | |
965 | default: | |
966 | return -EOPNOTSUPP; | |
967 | } | |
968 | } | |
969 | ||
970 | /** | |
971 | * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on | |
972 | * @descr: descriptor to process | |
973 | * @card: card structure | |
974 | * | |
975 | * Fills out skb structure and passes the data to the stack. | |
976 | * The descriptor state is not changed. | |
977 | */ | |
978 | static void | |
979 | spider_net_pass_skb_up(struct spider_net_descr *descr, | |
980 | struct spider_net_card *card) | |
981 | { | |
982 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; | |
983 | struct sk_buff *skb = descr->skb; | |
984 | struct net_device *netdev = card->netdev; | |
985 | u32 data_status = hwdescr->data_status; | |
986 | u32 data_error = hwdescr->data_error; | |
987 | ||
988 | skb_put(skb, hwdescr->valid_size); | |
989 | ||
990 | /* the card seems to add 2 bytes of junk in front | |
991 | * of the ethernet frame */ | |
992 | #define SPIDER_MISALIGN 2 | |
993 | skb_pull(skb, SPIDER_MISALIGN); | |
994 | skb->protocol = eth_type_trans(skb, netdev); | |
995 | ||
996 | /* checksum offload */ | |
997 | if (card->options.rx_csum) { | |
998 | if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == | |
999 | SPIDER_NET_DATA_STATUS_CKSUM_MASK) && | |
1000 | !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) | |
1001 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1002 | else | |
1003 | skb->ip_summed = CHECKSUM_NONE; | |
1004 | } else | |
1005 | skb->ip_summed = CHECKSUM_NONE; | |
1006 | ||
1007 | if (data_status & SPIDER_NET_VLAN_PACKET) { | |
1008 | /* further enhancements: HW-accel VLAN | |
1009 | * vlan_hwaccel_receive_skb | |
1010 | */ | |
1011 | } | |
1012 | ||
1013 | /* update netdevice statistics */ | |
1014 | netdev->stats.rx_packets++; | |
1015 | netdev->stats.rx_bytes += skb->len; | |
1016 | ||
1017 | /* pass skb up to stack */ | |
1018 | netif_receive_skb(skb); | |
1019 | } | |
1020 | ||
1021 | static void show_rx_chain(struct spider_net_card *card) | |
1022 | { | |
1023 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1024 | struct spider_net_descr *start= chain->tail; | |
1025 | struct spider_net_descr *descr= start; | |
1026 | struct spider_net_hw_descr *hwd = start->hwdescr; | |
1027 | struct device *dev = &card->netdev->dev; | |
1028 | u32 curr_desc, next_desc; | |
1029 | int status; | |
1030 | ||
1031 | int tot = 0; | |
1032 | int cnt = 0; | |
1033 | int off = start - chain->ring; | |
1034 | int cstat = hwd->dmac_cmd_status; | |
1035 | ||
1036 | dev_info(dev, "Total number of descrs=%d\n", | |
1037 | chain->num_desc); | |
1038 | dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n", | |
1039 | off, cstat); | |
1040 | ||
1041 | curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA); | |
1042 | next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA); | |
1043 | ||
1044 | status = cstat; | |
1045 | do | |
1046 | { | |
1047 | hwd = descr->hwdescr; | |
1048 | off = descr - chain->ring; | |
1049 | status = hwd->dmac_cmd_status; | |
1050 | ||
1051 | if (descr == chain->head) | |
1052 | dev_info(dev, "Chain head is at %d, head status=0x%x\n", | |
1053 | off, status); | |
1054 | ||
1055 | if (curr_desc == descr->bus_addr) | |
1056 | dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n", | |
1057 | off, status); | |
1058 | ||
1059 | if (next_desc == descr->bus_addr) | |
1060 | dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n", | |
1061 | off, status); | |
1062 | ||
1063 | if (hwd->next_descr_addr == 0) | |
1064 | dev_info(dev, "chain is cut at %d\n", off); | |
1065 | ||
1066 | if (cstat != status) { | |
1067 | int from = (chain->num_desc + off - cnt) % chain->num_desc; | |
1068 | int to = (chain->num_desc + off - 1) % chain->num_desc; | |
1069 | dev_info(dev, "Have %d (from %d to %d) descrs " | |
1070 | "with stat=0x%08x\n", cnt, from, to, cstat); | |
1071 | cstat = status; | |
1072 | cnt = 0; | |
1073 | } | |
1074 | ||
1075 | cnt ++; | |
1076 | tot ++; | |
1077 | descr = descr->next; | |
1078 | } while (descr != start); | |
1079 | ||
1080 | dev_info(dev, "Last %d descrs with stat=0x%08x " | |
1081 | "for a total of %d descrs\n", cnt, cstat, tot); | |
1082 | ||
1083 | #ifdef DEBUG | |
1084 | /* Now dump the whole ring */ | |
1085 | descr = start; | |
1086 | do | |
1087 | { | |
1088 | struct spider_net_hw_descr *hwd = descr->hwdescr; | |
1089 | status = spider_net_get_descr_status(hwd); | |
1090 | cnt = descr - chain->ring; | |
1091 | dev_info(dev, "Descr %d stat=0x%08x skb=%p\n", | |
1092 | cnt, status, descr->skb); | |
1093 | dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n", | |
1094 | descr->bus_addr, hwd->buf_addr, hwd->buf_size); | |
1095 | dev_info(dev, "next=%08x result sz=%d valid sz=%d\n", | |
1096 | hwd->next_descr_addr, hwd->result_size, | |
1097 | hwd->valid_size); | |
1098 | dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n", | |
1099 | hwd->dmac_cmd_status, hwd->data_status, | |
1100 | hwd->data_error); | |
1101 | dev_info(dev, "\n"); | |
1102 | ||
1103 | descr = descr->next; | |
1104 | } while (descr != start); | |
1105 | #endif | |
1106 | ||
1107 | } | |
1108 | ||
1109 | /** | |
1110 | * spider_net_resync_head_ptr - Advance head ptr past empty descrs | |
1111 | * | |
1112 | * If the driver fails to keep up and empty the queue, then the | |
1113 | * hardware wil run out of room to put incoming packets. This | |
1114 | * will cause the hardware to skip descrs that are full (instead | |
1115 | * of halting/retrying). Thus, once the driver runs, it wil need | |
1116 | * to "catch up" to where the hardware chain pointer is at. | |
1117 | */ | |
1118 | static void spider_net_resync_head_ptr(struct spider_net_card *card) | |
1119 | { | |
1120 | unsigned long flags; | |
1121 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1122 | struct spider_net_descr *descr; | |
1123 | int i, status; | |
1124 | ||
1125 | /* Advance head pointer past any empty descrs */ | |
1126 | descr = chain->head; | |
1127 | status = spider_net_get_descr_status(descr->hwdescr); | |
1128 | ||
1129 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) | |
1130 | return; | |
1131 | ||
1132 | spin_lock_irqsave(&chain->lock, flags); | |
1133 | ||
1134 | descr = chain->head; | |
1135 | status = spider_net_get_descr_status(descr->hwdescr); | |
1136 | for (i=0; i<chain->num_desc; i++) { | |
1137 | if (status != SPIDER_NET_DESCR_CARDOWNED) break; | |
1138 | descr = descr->next; | |
1139 | status = spider_net_get_descr_status(descr->hwdescr); | |
1140 | } | |
1141 | chain->head = descr; | |
1142 | ||
1143 | spin_unlock_irqrestore(&chain->lock, flags); | |
1144 | } | |
1145 | ||
1146 | static int spider_net_resync_tail_ptr(struct spider_net_card *card) | |
1147 | { | |
1148 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1149 | struct spider_net_descr *descr; | |
1150 | int i, status; | |
1151 | ||
1152 | /* Advance tail pointer past any empty and reaped descrs */ | |
1153 | descr = chain->tail; | |
1154 | status = spider_net_get_descr_status(descr->hwdescr); | |
1155 | ||
1156 | for (i=0; i<chain->num_desc; i++) { | |
1157 | if ((status != SPIDER_NET_DESCR_CARDOWNED) && | |
1158 | (status != SPIDER_NET_DESCR_NOT_IN_USE)) break; | |
1159 | descr = descr->next; | |
1160 | status = spider_net_get_descr_status(descr->hwdescr); | |
1161 | } | |
1162 | chain->tail = descr; | |
1163 | ||
1164 | if ((i == chain->num_desc) || (i == 0)) | |
1165 | return 1; | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | /** | |
1170 | * spider_net_decode_one_descr - processes an RX descriptor | |
1171 | * @card: card structure | |
1172 | * | |
1173 | * Returns 1 if a packet has been sent to the stack, otherwise 0. | |
1174 | * | |
1175 | * Processes an RX descriptor by iommu-unmapping the data buffer | |
1176 | * and passing the packet up to the stack. This function is called | |
1177 | * in softirq context, e.g. either bottom half from interrupt or | |
1178 | * NAPI polling context. | |
1179 | */ | |
1180 | static int | |
1181 | spider_net_decode_one_descr(struct spider_net_card *card) | |
1182 | { | |
1183 | struct net_device *dev = card->netdev; | |
1184 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1185 | struct spider_net_descr *descr = chain->tail; | |
1186 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; | |
1187 | u32 hw_buf_addr; | |
1188 | int status; | |
1189 | ||
1190 | status = spider_net_get_descr_status(hwdescr); | |
1191 | ||
1192 | /* Nothing in the descriptor, or ring must be empty */ | |
1193 | if ((status == SPIDER_NET_DESCR_CARDOWNED) || | |
1194 | (status == SPIDER_NET_DESCR_NOT_IN_USE)) | |
1195 | return 0; | |
1196 | ||
1197 | /* descriptor definitively used -- move on tail */ | |
1198 | chain->tail = descr->next; | |
1199 | ||
1200 | /* unmap descriptor */ | |
1201 | hw_buf_addr = hwdescr->buf_addr; | |
1202 | hwdescr->buf_addr = 0xffffffff; | |
1203 | pci_unmap_single(card->pdev, hw_buf_addr, | |
1204 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); | |
1205 | ||
1206 | if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || | |
1207 | (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || | |
1208 | (status == SPIDER_NET_DESCR_FORCE_END) ) { | |
1209 | if (netif_msg_rx_err(card)) | |
1210 | dev_err(&dev->dev, | |
1211 | "dropping RX descriptor with state %d\n", status); | |
1212 | dev->stats.rx_dropped++; | |
1213 | goto bad_desc; | |
1214 | } | |
1215 | ||
1216 | if ( (status != SPIDER_NET_DESCR_COMPLETE) && | |
1217 | (status != SPIDER_NET_DESCR_FRAME_END) ) { | |
1218 | if (netif_msg_rx_err(card)) | |
1219 | dev_err(&card->netdev->dev, | |
1220 | "RX descriptor with unknown state %d\n", status); | |
1221 | card->spider_stats.rx_desc_unk_state++; | |
1222 | goto bad_desc; | |
1223 | } | |
1224 | ||
1225 | /* The cases we'll throw away the packet immediately */ | |
1226 | if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) { | |
1227 | if (netif_msg_rx_err(card)) | |
1228 | dev_err(&card->netdev->dev, | |
1229 | "error in received descriptor found, " | |
1230 | "data_status=x%08x, data_error=x%08x\n", | |
1231 | hwdescr->data_status, hwdescr->data_error); | |
1232 | goto bad_desc; | |
1233 | } | |
1234 | ||
1235 | if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) { | |
1236 | dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", | |
1237 | hwdescr->dmac_cmd_status); | |
1238 | pr_err("buf_addr=x%08x\n", hw_buf_addr); | |
1239 | pr_err("buf_size=x%08x\n", hwdescr->buf_size); | |
1240 | pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); | |
1241 | pr_err("result_size=x%08x\n", hwdescr->result_size); | |
1242 | pr_err("valid_size=x%08x\n", hwdescr->valid_size); | |
1243 | pr_err("data_status=x%08x\n", hwdescr->data_status); | |
1244 | pr_err("data_error=x%08x\n", hwdescr->data_error); | |
1245 | pr_err("which=%ld\n", descr - card->rx_chain.ring); | |
1246 | ||
1247 | card->spider_stats.rx_desc_error++; | |
1248 | goto bad_desc; | |
1249 | } | |
1250 | ||
1251 | /* Ok, we've got a packet in descr */ | |
1252 | spider_net_pass_skb_up(descr, card); | |
1253 | descr->skb = NULL; | |
1254 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; | |
1255 | return 1; | |
1256 | ||
1257 | bad_desc: | |
1258 | if (netif_msg_rx_err(card)) | |
1259 | show_rx_chain(card); | |
1260 | dev_kfree_skb_irq(descr->skb); | |
1261 | descr->skb = NULL; | |
1262 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; | |
1263 | return 0; | |
1264 | } | |
1265 | ||
1266 | /** | |
1267 | * spider_net_poll - NAPI poll function called by the stack to return packets | |
1268 | * @netdev: interface device structure | |
1269 | * @budget: number of packets we can pass to the stack at most | |
1270 | * | |
1271 | * returns 0 if no more packets available to the driver/stack. Returns 1, | |
1272 | * if the quota is exceeded, but the driver has still packets. | |
1273 | * | |
1274 | * spider_net_poll returns all packets from the rx descriptors to the stack | |
1275 | * (using netif_receive_skb). If all/enough packets are up, the driver | |
1276 | * reenables interrupts and returns 0. If not, 1 is returned. | |
1277 | */ | |
1278 | static int spider_net_poll(struct napi_struct *napi, int budget) | |
1279 | { | |
1280 | struct spider_net_card *card = container_of(napi, struct spider_net_card, napi); | |
1281 | int packets_done = 0; | |
1282 | ||
1283 | while (packets_done < budget) { | |
1284 | if (!spider_net_decode_one_descr(card)) | |
1285 | break; | |
1286 | ||
1287 | packets_done++; | |
1288 | } | |
1289 | ||
1290 | if ((packets_done == 0) && (card->num_rx_ints != 0)) { | |
1291 | if (!spider_net_resync_tail_ptr(card)) | |
1292 | packets_done = budget; | |
1293 | spider_net_resync_head_ptr(card); | |
1294 | } | |
1295 | card->num_rx_ints = 0; | |
1296 | ||
1297 | spider_net_refill_rx_chain(card); | |
1298 | spider_net_enable_rxdmac(card); | |
1299 | ||
1300 | spider_net_cleanup_tx_ring(card); | |
1301 | ||
1302 | /* if all packets are in the stack, enable interrupts and return 0 */ | |
1303 | /* if not, return 1 */ | |
1304 | if (packets_done < budget) { | |
1305 | napi_complete(napi); | |
1306 | spider_net_rx_irq_on(card); | |
1307 | card->ignore_rx_ramfull = 0; | |
1308 | } | |
1309 | ||
1310 | return packets_done; | |
1311 | } | |
1312 | ||
1313 | /** | |
1314 | * spider_net_change_mtu - changes the MTU of an interface | |
1315 | * @netdev: interface device structure | |
1316 | * @new_mtu: new MTU value | |
1317 | * | |
1318 | * returns 0 on success, <0 on failure | |
1319 | */ | |
1320 | static int | |
1321 | spider_net_change_mtu(struct net_device *netdev, int new_mtu) | |
1322 | { | |
1323 | /* no need to re-alloc skbs or so -- the max mtu is about 2.3k | |
1324 | * and mtu is outbound only anyway */ | |
1325 | if ( (new_mtu < SPIDER_NET_MIN_MTU ) || | |
1326 | (new_mtu > SPIDER_NET_MAX_MTU) ) | |
1327 | return -EINVAL; | |
1328 | netdev->mtu = new_mtu; | |
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | /** | |
1333 | * spider_net_set_mac - sets the MAC of an interface | |
1334 | * @netdev: interface device structure | |
1335 | * @ptr: pointer to new MAC address | |
1336 | * | |
1337 | * Returns 0 on success, <0 on failure. Currently, we don't support this | |
1338 | * and will always return EOPNOTSUPP. | |
1339 | */ | |
1340 | static int | |
1341 | spider_net_set_mac(struct net_device *netdev, void *p) | |
1342 | { | |
1343 | struct spider_net_card *card = netdev_priv(netdev); | |
1344 | u32 macl, macu, regvalue; | |
1345 | struct sockaddr *addr = p; | |
1346 | ||
1347 | if (!is_valid_ether_addr(addr->sa_data)) | |
1348 | return -EADDRNOTAVAIL; | |
1349 | ||
1350 | /* switch off GMACTPE and GMACRPE */ | |
1351 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1352 | regvalue &= ~((1 << 5) | (1 << 6)); | |
1353 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1354 | ||
1355 | /* write mac */ | |
1356 | macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) + | |
1357 | (addr->sa_data[2]<<8) + (addr->sa_data[3]); | |
1358 | macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]); | |
1359 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); | |
1360 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); | |
1361 | ||
1362 | /* switch GMACTPE and GMACRPE back on */ | |
1363 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1364 | regvalue |= ((1 << 5) | (1 << 6)); | |
1365 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1366 | ||
1367 | spider_net_set_promisc(card); | |
1368 | ||
1369 | /* look up, whether we have been successful */ | |
1370 | if (spider_net_get_mac_address(netdev)) | |
1371 | return -EADDRNOTAVAIL; | |
1372 | if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len)) | |
1373 | return -EADDRNOTAVAIL; | |
1374 | ||
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | /** | |
1379 | * spider_net_link_reset | |
1380 | * @netdev: net device structure | |
1381 | * | |
1382 | * This is called when the PHY_LINK signal is asserted. For the blade this is | |
1383 | * not connected so we should never get here. | |
1384 | * | |
1385 | */ | |
1386 | static void | |
1387 | spider_net_link_reset(struct net_device *netdev) | |
1388 | { | |
1389 | ||
1390 | struct spider_net_card *card = netdev_priv(netdev); | |
1391 | ||
1392 | del_timer_sync(&card->aneg_timer); | |
1393 | ||
1394 | /* clear interrupt, block further interrupts */ | |
1395 | spider_net_write_reg(card, SPIDER_NET_GMACST, | |
1396 | spider_net_read_reg(card, SPIDER_NET_GMACST)); | |
1397 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); | |
1398 | ||
1399 | /* reset phy and setup aneg */ | |
1400 | card->aneg_count = 0; | |
1401 | card->medium = BCM54XX_COPPER; | |
1402 | spider_net_setup_aneg(card); | |
1403 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1404 | ||
1405 | } | |
1406 | ||
1407 | /** | |
1408 | * spider_net_handle_error_irq - handles errors raised by an interrupt | |
1409 | * @card: card structure | |
1410 | * @status_reg: interrupt status register 0 (GHIINT0STS) | |
1411 | * | |
1412 | * spider_net_handle_error_irq treats or ignores all error conditions | |
1413 | * found when an interrupt is presented | |
1414 | */ | |
1415 | static void | |
1416 | spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg, | |
1417 | u32 error_reg1, u32 error_reg2) | |
1418 | { | |
1419 | u32 i; | |
1420 | int show_error = 1; | |
1421 | ||
1422 | /* check GHIINT0STS ************************************/ | |
1423 | if (status_reg) | |
1424 | for (i = 0; i < 32; i++) | |
1425 | if (status_reg & (1<<i)) | |
1426 | switch (i) | |
1427 | { | |
1428 | /* let error_reg1 and error_reg2 evaluation decide, what to do | |
1429 | case SPIDER_NET_PHYINT: | |
1430 | case SPIDER_NET_GMAC2INT: | |
1431 | case SPIDER_NET_GMAC1INT: | |
1432 | case SPIDER_NET_GFIFOINT: | |
1433 | case SPIDER_NET_DMACINT: | |
1434 | case SPIDER_NET_GSYSINT: | |
1435 | break; */ | |
1436 | ||
1437 | case SPIDER_NET_GIPSINT: | |
1438 | show_error = 0; | |
1439 | break; | |
1440 | ||
1441 | case SPIDER_NET_GPWOPCMPINT: | |
1442 | /* PHY write operation completed */ | |
1443 | show_error = 0; | |
1444 | break; | |
1445 | case SPIDER_NET_GPROPCMPINT: | |
1446 | /* PHY read operation completed */ | |
1447 | /* we don't use semaphores, as we poll for the completion | |
1448 | * of the read operation in spider_net_read_phy. Should take | |
1449 | * about 50 us */ | |
1450 | show_error = 0; | |
1451 | break; | |
1452 | case SPIDER_NET_GPWFFINT: | |
1453 | /* PHY command queue full */ | |
1454 | if (netif_msg_intr(card)) | |
1455 | dev_err(&card->netdev->dev, "PHY write queue full\n"); | |
1456 | show_error = 0; | |
1457 | break; | |
1458 | ||
1459 | /* case SPIDER_NET_GRMDADRINT: not used. print a message */ | |
1460 | /* case SPIDER_NET_GRMARPINT: not used. print a message */ | |
1461 | /* case SPIDER_NET_GRMMPINT: not used. print a message */ | |
1462 | ||
1463 | case SPIDER_NET_GDTDEN0INT: | |
1464 | /* someone has set TX_DMA_EN to 0 */ | |
1465 | show_error = 0; | |
1466 | break; | |
1467 | ||
1468 | case SPIDER_NET_GDDDEN0INT: /* fallthrough */ | |
1469 | case SPIDER_NET_GDCDEN0INT: /* fallthrough */ | |
1470 | case SPIDER_NET_GDBDEN0INT: /* fallthrough */ | |
1471 | case SPIDER_NET_GDADEN0INT: | |
1472 | /* someone has set RX_DMA_EN to 0 */ | |
1473 | show_error = 0; | |
1474 | break; | |
1475 | ||
1476 | /* RX interrupts */ | |
1477 | case SPIDER_NET_GDDFDCINT: | |
1478 | case SPIDER_NET_GDCFDCINT: | |
1479 | case SPIDER_NET_GDBFDCINT: | |
1480 | case SPIDER_NET_GDAFDCINT: | |
1481 | /* case SPIDER_NET_GDNMINT: not used. print a message */ | |
1482 | /* case SPIDER_NET_GCNMINT: not used. print a message */ | |
1483 | /* case SPIDER_NET_GBNMINT: not used. print a message */ | |
1484 | /* case SPIDER_NET_GANMINT: not used. print a message */ | |
1485 | /* case SPIDER_NET_GRFNMINT: not used. print a message */ | |
1486 | show_error = 0; | |
1487 | break; | |
1488 | ||
1489 | /* TX interrupts */ | |
1490 | case SPIDER_NET_GDTFDCINT: | |
1491 | show_error = 0; | |
1492 | break; | |
1493 | case SPIDER_NET_GTTEDINT: | |
1494 | show_error = 0; | |
1495 | break; | |
1496 | case SPIDER_NET_GDTDCEINT: | |
1497 | /* chain end. If a descriptor should be sent, kick off | |
1498 | * tx dma | |
1499 | if (card->tx_chain.tail != card->tx_chain.head) | |
1500 | spider_net_kick_tx_dma(card); | |
1501 | */ | |
1502 | show_error = 0; | |
1503 | break; | |
1504 | ||
1505 | /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ | |
1506 | /* case SPIDER_NET_GFREECNTINT: not used. print a message */ | |
1507 | } | |
1508 | ||
1509 | /* check GHIINT1STS ************************************/ | |
1510 | if (error_reg1) | |
1511 | for (i = 0; i < 32; i++) | |
1512 | if (error_reg1 & (1<<i)) | |
1513 | switch (i) | |
1514 | { | |
1515 | case SPIDER_NET_GTMFLLINT: | |
1516 | /* TX RAM full may happen on a usual case. | |
1517 | * Logging is not needed. */ | |
1518 | show_error = 0; | |
1519 | break; | |
1520 | case SPIDER_NET_GRFDFLLINT: /* fallthrough */ | |
1521 | case SPIDER_NET_GRFCFLLINT: /* fallthrough */ | |
1522 | case SPIDER_NET_GRFBFLLINT: /* fallthrough */ | |
1523 | case SPIDER_NET_GRFAFLLINT: /* fallthrough */ | |
1524 | case SPIDER_NET_GRMFLLINT: | |
1525 | /* Could happen when rx chain is full */ | |
1526 | if (card->ignore_rx_ramfull == 0) { | |
1527 | card->ignore_rx_ramfull = 1; | |
1528 | spider_net_resync_head_ptr(card); | |
1529 | spider_net_refill_rx_chain(card); | |
1530 | spider_net_enable_rxdmac(card); | |
1531 | card->num_rx_ints ++; | |
1532 | napi_schedule(&card->napi); | |
1533 | } | |
1534 | show_error = 0; | |
1535 | break; | |
1536 | ||
1537 | /* case SPIDER_NET_GTMSHTINT: problem, print a message */ | |
1538 | case SPIDER_NET_GDTINVDINT: | |
1539 | /* allrighty. tx from previous descr ok */ | |
1540 | show_error = 0; | |
1541 | break; | |
1542 | ||
1543 | /* chain end */ | |
1544 | case SPIDER_NET_GDDDCEINT: /* fallthrough */ | |
1545 | case SPIDER_NET_GDCDCEINT: /* fallthrough */ | |
1546 | case SPIDER_NET_GDBDCEINT: /* fallthrough */ | |
1547 | case SPIDER_NET_GDADCEINT: | |
1548 | spider_net_resync_head_ptr(card); | |
1549 | spider_net_refill_rx_chain(card); | |
1550 | spider_net_enable_rxdmac(card); | |
1551 | card->num_rx_ints ++; | |
1552 | napi_schedule(&card->napi); | |
1553 | show_error = 0; | |
1554 | break; | |
1555 | ||
1556 | /* invalid descriptor */ | |
1557 | case SPIDER_NET_GDDINVDINT: /* fallthrough */ | |
1558 | case SPIDER_NET_GDCINVDINT: /* fallthrough */ | |
1559 | case SPIDER_NET_GDBINVDINT: /* fallthrough */ | |
1560 | case SPIDER_NET_GDAINVDINT: | |
1561 | /* Could happen when rx chain is full */ | |
1562 | spider_net_resync_head_ptr(card); | |
1563 | spider_net_refill_rx_chain(card); | |
1564 | spider_net_enable_rxdmac(card); | |
1565 | card->num_rx_ints ++; | |
1566 | napi_schedule(&card->napi); | |
1567 | show_error = 0; | |
1568 | break; | |
1569 | ||
1570 | /* case SPIDER_NET_GDTRSERINT: problem, print a message */ | |
1571 | /* case SPIDER_NET_GDDRSERINT: problem, print a message */ | |
1572 | /* case SPIDER_NET_GDCRSERINT: problem, print a message */ | |
1573 | /* case SPIDER_NET_GDBRSERINT: problem, print a message */ | |
1574 | /* case SPIDER_NET_GDARSERINT: problem, print a message */ | |
1575 | /* case SPIDER_NET_GDSERINT: problem, print a message */ | |
1576 | /* case SPIDER_NET_GDTPTERINT: problem, print a message */ | |
1577 | /* case SPIDER_NET_GDDPTERINT: problem, print a message */ | |
1578 | /* case SPIDER_NET_GDCPTERINT: problem, print a message */ | |
1579 | /* case SPIDER_NET_GDBPTERINT: problem, print a message */ | |
1580 | /* case SPIDER_NET_GDAPTERINT: problem, print a message */ | |
1581 | default: | |
1582 | show_error = 1; | |
1583 | break; | |
1584 | } | |
1585 | ||
1586 | /* check GHIINT2STS ************************************/ | |
1587 | if (error_reg2) | |
1588 | for (i = 0; i < 32; i++) | |
1589 | if (error_reg2 & (1<<i)) | |
1590 | switch (i) | |
1591 | { | |
1592 | /* there is nothing we can (want to) do at this time. Log a | |
1593 | * message, we can switch on and off the specific values later on | |
1594 | case SPIDER_NET_GPROPERINT: | |
1595 | case SPIDER_NET_GMCTCRSNGINT: | |
1596 | case SPIDER_NET_GMCTLCOLINT: | |
1597 | case SPIDER_NET_GMCTTMOTINT: | |
1598 | case SPIDER_NET_GMCRCAERINT: | |
1599 | case SPIDER_NET_GMCRCALERINT: | |
1600 | case SPIDER_NET_GMCRALNERINT: | |
1601 | case SPIDER_NET_GMCROVRINT: | |
1602 | case SPIDER_NET_GMCRRNTINT: | |
1603 | case SPIDER_NET_GMCRRXERINT: | |
1604 | case SPIDER_NET_GTITCSERINT: | |
1605 | case SPIDER_NET_GTIFMTERINT: | |
1606 | case SPIDER_NET_GTIPKTRVKINT: | |
1607 | case SPIDER_NET_GTISPINGINT: | |
1608 | case SPIDER_NET_GTISADNGINT: | |
1609 | case SPIDER_NET_GTISPDNGINT: | |
1610 | case SPIDER_NET_GRIFMTERINT: | |
1611 | case SPIDER_NET_GRIPKTRVKINT: | |
1612 | case SPIDER_NET_GRISPINGINT: | |
1613 | case SPIDER_NET_GRISADNGINT: | |
1614 | case SPIDER_NET_GRISPDNGINT: | |
1615 | break; | |
1616 | */ | |
1617 | default: | |
1618 | break; | |
1619 | } | |
1620 | ||
1621 | if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) | |
1622 | dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, " | |
1623 | "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", | |
1624 | status_reg, error_reg1, error_reg2); | |
1625 | ||
1626 | /* clear interrupt sources */ | |
1627 | spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); | |
1628 | spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); | |
1629 | } | |
1630 | ||
1631 | /** | |
1632 | * spider_net_interrupt - interrupt handler for spider_net | |
1633 | * @irq: interrupt number | |
1634 | * @ptr: pointer to net_device | |
1635 | * | |
1636 | * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no | |
1637 | * interrupt found raised by card. | |
1638 | * | |
1639 | * This is the interrupt handler, that turns off | |
1640 | * interrupts for this device and makes the stack poll the driver | |
1641 | */ | |
1642 | static irqreturn_t | |
1643 | spider_net_interrupt(int irq, void *ptr) | |
1644 | { | |
1645 | struct net_device *netdev = ptr; | |
1646 | struct spider_net_card *card = netdev_priv(netdev); | |
1647 | u32 status_reg, error_reg1, error_reg2; | |
1648 | ||
1649 | status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); | |
1650 | error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); | |
1651 | error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); | |
1652 | ||
1653 | if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) && | |
1654 | !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) && | |
1655 | !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE)) | |
1656 | return IRQ_NONE; | |
1657 | ||
1658 | if (status_reg & SPIDER_NET_RXINT ) { | |
1659 | spider_net_rx_irq_off(card); | |
1660 | napi_schedule(&card->napi); | |
1661 | card->num_rx_ints ++; | |
1662 | } | |
1663 | if (status_reg & SPIDER_NET_TXINT) | |
1664 | napi_schedule(&card->napi); | |
1665 | ||
1666 | if (status_reg & SPIDER_NET_LINKINT) | |
1667 | spider_net_link_reset(netdev); | |
1668 | ||
1669 | if (status_reg & SPIDER_NET_ERRINT ) | |
1670 | spider_net_handle_error_irq(card, status_reg, | |
1671 | error_reg1, error_reg2); | |
1672 | ||
1673 | /* clear interrupt sources */ | |
1674 | spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); | |
1675 | ||
1676 | return IRQ_HANDLED; | |
1677 | } | |
1678 | ||
1679 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1680 | /** | |
1681 | * spider_net_poll_controller - artificial interrupt for netconsole etc. | |
1682 | * @netdev: interface device structure | |
1683 | * | |
1684 | * see Documentation/networking/netconsole.txt | |
1685 | */ | |
1686 | static void | |
1687 | spider_net_poll_controller(struct net_device *netdev) | |
1688 | { | |
1689 | disable_irq(netdev->irq); | |
1690 | spider_net_interrupt(netdev->irq, netdev); | |
1691 | enable_irq(netdev->irq); | |
1692 | } | |
1693 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1694 | ||
1695 | /** | |
1696 | * spider_net_enable_interrupts - enable interrupts | |
1697 | * @card: card structure | |
1698 | * | |
1699 | * spider_net_enable_interrupt enables several interrupts | |
1700 | */ | |
1701 | static void | |
1702 | spider_net_enable_interrupts(struct spider_net_card *card) | |
1703 | { | |
1704 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, | |
1705 | SPIDER_NET_INT0_MASK_VALUE); | |
1706 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, | |
1707 | SPIDER_NET_INT1_MASK_VALUE); | |
1708 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, | |
1709 | SPIDER_NET_INT2_MASK_VALUE); | |
1710 | } | |
1711 | ||
1712 | /** | |
1713 | * spider_net_disable_interrupts - disable interrupts | |
1714 | * @card: card structure | |
1715 | * | |
1716 | * spider_net_disable_interrupts disables all the interrupts | |
1717 | */ | |
1718 | static void | |
1719 | spider_net_disable_interrupts(struct spider_net_card *card) | |
1720 | { | |
1721 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); | |
1722 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); | |
1723 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); | |
1724 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); | |
1725 | } | |
1726 | ||
1727 | /** | |
1728 | * spider_net_init_card - initializes the card | |
1729 | * @card: card structure | |
1730 | * | |
1731 | * spider_net_init_card initializes the card so that other registers can | |
1732 | * be used | |
1733 | */ | |
1734 | static void | |
1735 | spider_net_init_card(struct spider_net_card *card) | |
1736 | { | |
1737 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1738 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1739 | ||
1740 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1741 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
1742 | ||
1743 | /* trigger ETOMOD signal */ | |
1744 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, | |
1745 | spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); | |
1746 | ||
1747 | spider_net_disable_interrupts(card); | |
1748 | } | |
1749 | ||
1750 | /** | |
1751 | * spider_net_enable_card - enables the card by setting all kinds of regs | |
1752 | * @card: card structure | |
1753 | * | |
1754 | * spider_net_enable_card sets a lot of SMMIO registers to enable the device | |
1755 | */ | |
1756 | static void | |
1757 | spider_net_enable_card(struct spider_net_card *card) | |
1758 | { | |
1759 | int i; | |
1760 | /* the following array consists of (register),(value) pairs | |
1761 | * that are set in this function. A register of 0 ends the list */ | |
1762 | u32 regs[][2] = { | |
1763 | { SPIDER_NET_GRESUMINTNUM, 0 }, | |
1764 | { SPIDER_NET_GREINTNUM, 0 }, | |
1765 | ||
1766 | /* set interrupt frame number registers */ | |
1767 | /* clear the single DMA engine registers first */ | |
1768 | { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1769 | { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1770 | { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1771 | { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1772 | /* then set, what we really need */ | |
1773 | { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, | |
1774 | ||
1775 | /* timer counter registers and stuff */ | |
1776 | { SPIDER_NET_GFREECNNUM, 0 }, | |
1777 | { SPIDER_NET_GONETIMENUM, 0 }, | |
1778 | { SPIDER_NET_GTOUTFRMNUM, 0 }, | |
1779 | ||
1780 | /* RX mode setting */ | |
1781 | { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, | |
1782 | /* TX mode setting */ | |
1783 | { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, | |
1784 | /* IPSEC mode setting */ | |
1785 | { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, | |
1786 | ||
1787 | { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, | |
1788 | ||
1789 | { SPIDER_NET_GMRWOLCTRL, 0 }, | |
1790 | { SPIDER_NET_GTESTMD, 0x10000000 }, | |
1791 | { SPIDER_NET_GTTQMSK, 0x00400040 }, | |
1792 | ||
1793 | { SPIDER_NET_GMACINTEN, 0 }, | |
1794 | ||
1795 | /* flow control stuff */ | |
1796 | { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, | |
1797 | { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, | |
1798 | ||
1799 | { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, | |
1800 | { 0, 0} | |
1801 | }; | |
1802 | ||
1803 | i = 0; | |
1804 | while (regs[i][0]) { | |
1805 | spider_net_write_reg(card, regs[i][0], regs[i][1]); | |
1806 | i++; | |
1807 | } | |
1808 | ||
1809 | /* clear unicast filter table entries 1 to 14 */ | |
1810 | for (i = 1; i <= 14; i++) { | |
1811 | spider_net_write_reg(card, | |
1812 | SPIDER_NET_GMRUAFILnR + i * 8, | |
1813 | 0x00080000); | |
1814 | spider_net_write_reg(card, | |
1815 | SPIDER_NET_GMRUAFILnR + i * 8 + 4, | |
1816 | 0x00000000); | |
1817 | } | |
1818 | ||
1819 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); | |
1820 | ||
1821 | spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); | |
1822 | ||
1823 | /* set chain tail address for RX chains and | |
1824 | * enable DMA */ | |
1825 | spider_net_enable_rxchtails(card); | |
1826 | spider_net_enable_rxdmac(card); | |
1827 | ||
1828 | spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); | |
1829 | ||
1830 | spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, | |
1831 | SPIDER_NET_LENLMT_VALUE); | |
1832 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, | |
1833 | SPIDER_NET_OPMODE_VALUE); | |
1834 | ||
1835 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
1836 | SPIDER_NET_GDTBSTA); | |
1837 | } | |
1838 | ||
1839 | /** | |
1840 | * spider_net_download_firmware - loads firmware into the adapter | |
1841 | * @card: card structure | |
1842 | * @firmware_ptr: pointer to firmware data | |
1843 | * | |
1844 | * spider_net_download_firmware loads the firmware data into the | |
1845 | * adapter. It assumes the length etc. to be allright. | |
1846 | */ | |
1847 | static int | |
1848 | spider_net_download_firmware(struct spider_net_card *card, | |
1849 | const void *firmware_ptr) | |
1850 | { | |
1851 | int sequencer, i; | |
1852 | const u32 *fw_ptr = firmware_ptr; | |
1853 | ||
1854 | /* stop sequencers */ | |
1855 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1856 | SPIDER_NET_STOP_SEQ_VALUE); | |
1857 | ||
1858 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; | |
1859 | sequencer++) { | |
1860 | spider_net_write_reg(card, | |
1861 | SPIDER_NET_GSnPRGADR + sequencer * 8, 0); | |
1862 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { | |
1863 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + | |
1864 | sequencer * 8, *fw_ptr); | |
1865 | fw_ptr++; | |
1866 | } | |
1867 | } | |
1868 | ||
1869 | if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) | |
1870 | return -EIO; | |
1871 | ||
1872 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1873 | SPIDER_NET_RUN_SEQ_VALUE); | |
1874 | ||
1875 | return 0; | |
1876 | } | |
1877 | ||
1878 | /** | |
1879 | * spider_net_init_firmware - reads in firmware parts | |
1880 | * @card: card structure | |
1881 | * | |
1882 | * Returns 0 on success, <0 on failure | |
1883 | * | |
1884 | * spider_net_init_firmware opens the sequencer firmware and does some basic | |
1885 | * checks. This function opens and releases the firmware structure. A call | |
1886 | * to download the firmware is performed before the release. | |
1887 | * | |
1888 | * Firmware format | |
1889 | * =============== | |
1890 | * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being | |
1891 | * the program for each sequencer. Use the command | |
1892 | * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ | |
1893 | * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ | |
1894 | * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin | |
1895 | * | |
1896 | * to generate spider_fw.bin, if you have sequencer programs with something | |
1897 | * like the following contents for each sequencer: | |
1898 | * <ONE LINE COMMENT> | |
1899 | * <FIRST 4-BYTES-WORD FOR SEQUENCER> | |
1900 | * <SECOND 4-BYTES-WORD FOR SEQUENCER> | |
1901 | * ... | |
1902 | * <1024th 4-BYTES-WORD FOR SEQUENCER> | |
1903 | */ | |
1904 | static int | |
1905 | spider_net_init_firmware(struct spider_net_card *card) | |
1906 | { | |
1907 | struct firmware *firmware = NULL; | |
1908 | struct device_node *dn; | |
1909 | const u8 *fw_prop = NULL; | |
1910 | int err = -ENOENT; | |
1911 | int fw_size; | |
1912 | ||
1913 | if (request_firmware((const struct firmware **)&firmware, | |
1914 | SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { | |
1915 | if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && | |
1916 | netif_msg_probe(card) ) { | |
1917 | dev_err(&card->netdev->dev, | |
1918 | "Incorrect size of spidernet firmware in " \ | |
1919 | "filesystem. Looking in host firmware...\n"); | |
1920 | goto try_host_fw; | |
1921 | } | |
1922 | err = spider_net_download_firmware(card, firmware->data); | |
1923 | ||
1924 | release_firmware(firmware); | |
1925 | if (err) | |
1926 | goto try_host_fw; | |
1927 | ||
1928 | goto done; | |
1929 | } | |
1930 | ||
1931 | try_host_fw: | |
1932 | dn = pci_device_to_OF_node(card->pdev); | |
1933 | if (!dn) | |
1934 | goto out_err; | |
1935 | ||
1936 | fw_prop = of_get_property(dn, "firmware", &fw_size); | |
1937 | if (!fw_prop) | |
1938 | goto out_err; | |
1939 | ||
1940 | if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && | |
1941 | netif_msg_probe(card) ) { | |
1942 | dev_err(&card->netdev->dev, | |
1943 | "Incorrect size of spidernet firmware in host firmware\n"); | |
1944 | goto done; | |
1945 | } | |
1946 | ||
1947 | err = spider_net_download_firmware(card, fw_prop); | |
1948 | ||
1949 | done: | |
1950 | return err; | |
1951 | out_err: | |
1952 | if (netif_msg_probe(card)) | |
1953 | dev_err(&card->netdev->dev, | |
1954 | "Couldn't find spidernet firmware in filesystem " \ | |
1955 | "or host firmware\n"); | |
1956 | return err; | |
1957 | } | |
1958 | ||
1959 | /** | |
1960 | * spider_net_open - called upon ifonfig up | |
1961 | * @netdev: interface device structure | |
1962 | * | |
1963 | * returns 0 on success, <0 on failure | |
1964 | * | |
1965 | * spider_net_open allocates all the descriptors and memory needed for | |
1966 | * operation, sets up multicast list and enables interrupts | |
1967 | */ | |
1968 | int | |
1969 | spider_net_open(struct net_device *netdev) | |
1970 | { | |
1971 | struct spider_net_card *card = netdev_priv(netdev); | |
1972 | int result; | |
1973 | ||
1974 | result = spider_net_init_firmware(card); | |
1975 | if (result) | |
1976 | goto init_firmware_failed; | |
1977 | ||
1978 | /* start probing with copper */ | |
1979 | card->aneg_count = 0; | |
1980 | card->medium = BCM54XX_COPPER; | |
1981 | spider_net_setup_aneg(card); | |
1982 | if (card->phy.def->phy_id) | |
1983 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1984 | ||
1985 | result = spider_net_init_chain(card, &card->tx_chain); | |
1986 | if (result) | |
1987 | goto alloc_tx_failed; | |
1988 | card->low_watermark = NULL; | |
1989 | ||
1990 | result = spider_net_init_chain(card, &card->rx_chain); | |
1991 | if (result) | |
1992 | goto alloc_rx_failed; | |
1993 | ||
1994 | /* Allocate rx skbs */ | |
1995 | if (spider_net_alloc_rx_skbs(card)) | |
1996 | goto alloc_skbs_failed; | |
1997 | ||
1998 | spider_net_set_multi(netdev); | |
1999 | ||
2000 | /* further enhancement: setup hw vlan, if needed */ | |
2001 | ||
2002 | result = -EBUSY; | |
2003 | if (request_irq(netdev->irq, spider_net_interrupt, | |
2004 | IRQF_SHARED, netdev->name, netdev)) | |
2005 | goto register_int_failed; | |
2006 | ||
2007 | spider_net_enable_card(card); | |
2008 | ||
2009 | netif_start_queue(netdev); | |
2010 | netif_carrier_on(netdev); | |
2011 | napi_enable(&card->napi); | |
2012 | ||
2013 | spider_net_enable_interrupts(card); | |
2014 | ||
2015 | return 0; | |
2016 | ||
2017 | register_int_failed: | |
2018 | spider_net_free_rx_chain_contents(card); | |
2019 | alloc_skbs_failed: | |
2020 | spider_net_free_chain(card, &card->rx_chain); | |
2021 | alloc_rx_failed: | |
2022 | spider_net_free_chain(card, &card->tx_chain); | |
2023 | alloc_tx_failed: | |
2024 | del_timer_sync(&card->aneg_timer); | |
2025 | init_firmware_failed: | |
2026 | return result; | |
2027 | } | |
2028 | ||
2029 | /** | |
2030 | * spider_net_link_phy | |
2031 | * @data: used for pointer to card structure | |
2032 | * | |
2033 | */ | |
2034 | static void spider_net_link_phy(unsigned long data) | |
2035 | { | |
2036 | struct spider_net_card *card = (struct spider_net_card *)data; | |
2037 | struct mii_phy *phy = &card->phy; | |
2038 | ||
2039 | /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ | |
2040 | if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { | |
2041 | ||
2042 | pr_debug("%s: link is down trying to bring it up\n", | |
2043 | card->netdev->name); | |
2044 | ||
2045 | switch (card->medium) { | |
2046 | case BCM54XX_COPPER: | |
2047 | /* enable fiber with autonegotiation first */ | |
2048 | if (phy->def->ops->enable_fiber) | |
2049 | phy->def->ops->enable_fiber(phy, 1); | |
2050 | card->medium = BCM54XX_FIBER; | |
2051 | break; | |
2052 | ||
2053 | case BCM54XX_FIBER: | |
2054 | /* fiber didn't come up, try to disable fiber autoneg */ | |
2055 | if (phy->def->ops->enable_fiber) | |
2056 | phy->def->ops->enable_fiber(phy, 0); | |
2057 | card->medium = BCM54XX_UNKNOWN; | |
2058 | break; | |
2059 | ||
2060 | case BCM54XX_UNKNOWN: | |
2061 | /* copper, fiber with and without failed, | |
2062 | * retry from beginning */ | |
2063 | spider_net_setup_aneg(card); | |
2064 | card->medium = BCM54XX_COPPER; | |
2065 | break; | |
2066 | } | |
2067 | ||
2068 | card->aneg_count = 0; | |
2069 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
2070 | return; | |
2071 | } | |
2072 | ||
2073 | /* link still not up, try again later */ | |
2074 | if (!(phy->def->ops->poll_link(phy))) { | |
2075 | card->aneg_count++; | |
2076 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
2077 | return; | |
2078 | } | |
2079 | ||
2080 | /* link came up, get abilities */ | |
2081 | phy->def->ops->read_link(phy); | |
2082 | ||
2083 | spider_net_write_reg(card, SPIDER_NET_GMACST, | |
2084 | spider_net_read_reg(card, SPIDER_NET_GMACST)); | |
2085 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); | |
2086 | ||
2087 | if (phy->speed == 1000) | |
2088 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); | |
2089 | else | |
2090 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); | |
2091 | ||
2092 | card->aneg_count = 0; | |
2093 | ||
2094 | pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n", | |
2095 | card->netdev->name, phy->speed, | |
2096 | phy->duplex == 1 ? "Full" : "Half", | |
2097 | phy->autoneg == 1 ? "" : "no "); | |
2098 | ||
2099 | return; | |
2100 | } | |
2101 | ||
2102 | /** | |
2103 | * spider_net_setup_phy - setup PHY | |
2104 | * @card: card structure | |
2105 | * | |
2106 | * returns 0 on success, <0 on failure | |
2107 | * | |
2108 | * spider_net_setup_phy is used as part of spider_net_probe. | |
2109 | **/ | |
2110 | static int | |
2111 | spider_net_setup_phy(struct spider_net_card *card) | |
2112 | { | |
2113 | struct mii_phy *phy = &card->phy; | |
2114 | ||
2115 | spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, | |
2116 | SPIDER_NET_DMASEL_VALUE); | |
2117 | spider_net_write_reg(card, SPIDER_NET_GPCCTRL, | |
2118 | SPIDER_NET_PHY_CTRL_VALUE); | |
2119 | ||
2120 | phy->dev = card->netdev; | |
2121 | phy->mdio_read = spider_net_read_phy; | |
2122 | phy->mdio_write = spider_net_write_phy; | |
2123 | ||
2124 | for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { | |
2125 | unsigned short id; | |
2126 | id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); | |
2127 | if (id != 0x0000 && id != 0xffff) { | |
2128 | if (!mii_phy_probe(phy, phy->mii_id)) { | |
2129 | pr_info("Found %s.\n", phy->def->name); | |
2130 | break; | |
2131 | } | |
2132 | } | |
2133 | } | |
2134 | ||
2135 | return 0; | |
2136 | } | |
2137 | ||
2138 | /** | |
2139 | * spider_net_workaround_rxramfull - work around firmware bug | |
2140 | * @card: card structure | |
2141 | * | |
2142 | * no return value | |
2143 | **/ | |
2144 | static void | |
2145 | spider_net_workaround_rxramfull(struct spider_net_card *card) | |
2146 | { | |
2147 | int i, sequencer = 0; | |
2148 | ||
2149 | /* cancel reset */ | |
2150 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2151 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2152 | ||
2153 | /* empty sequencer data */ | |
2154 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; | |
2155 | sequencer++) { | |
2156 | spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + | |
2157 | sequencer * 8, 0x0); | |
2158 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { | |
2159 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + | |
2160 | sequencer * 8, 0x0); | |
2161 | } | |
2162 | } | |
2163 | ||
2164 | /* set sequencer operation */ | |
2165 | spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); | |
2166 | ||
2167 | /* reset */ | |
2168 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2169 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2170 | } | |
2171 | ||
2172 | /** | |
2173 | * spider_net_stop - called upon ifconfig down | |
2174 | * @netdev: interface device structure | |
2175 | * | |
2176 | * always returns 0 | |
2177 | */ | |
2178 | int | |
2179 | spider_net_stop(struct net_device *netdev) | |
2180 | { | |
2181 | struct spider_net_card *card = netdev_priv(netdev); | |
2182 | ||
2183 | napi_disable(&card->napi); | |
2184 | netif_carrier_off(netdev); | |
2185 | netif_stop_queue(netdev); | |
2186 | del_timer_sync(&card->tx_timer); | |
2187 | del_timer_sync(&card->aneg_timer); | |
2188 | ||
2189 | spider_net_disable_interrupts(card); | |
2190 | ||
2191 | free_irq(netdev->irq, netdev); | |
2192 | ||
2193 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
2194 | SPIDER_NET_DMA_TX_FEND_VALUE); | |
2195 | ||
2196 | /* turn off DMA, force end */ | |
2197 | spider_net_disable_rxdmac(card); | |
2198 | ||
2199 | /* release chains */ | |
2200 | spider_net_release_tx_chain(card, 1); | |
2201 | spider_net_free_rx_chain_contents(card); | |
2202 | ||
2203 | spider_net_free_chain(card, &card->tx_chain); | |
2204 | spider_net_free_chain(card, &card->rx_chain); | |
2205 | ||
2206 | return 0; | |
2207 | } | |
2208 | ||
2209 | /** | |
2210 | * spider_net_tx_timeout_task - task scheduled by the watchdog timeout | |
2211 | * function (to be called not under interrupt status) | |
2212 | * @data: data, is interface device structure | |
2213 | * | |
2214 | * called as task when tx hangs, resets interface (if interface is up) | |
2215 | */ | |
2216 | static void | |
2217 | spider_net_tx_timeout_task(struct work_struct *work) | |
2218 | { | |
2219 | struct spider_net_card *card = | |
2220 | container_of(work, struct spider_net_card, tx_timeout_task); | |
2221 | struct net_device *netdev = card->netdev; | |
2222 | ||
2223 | if (!(netdev->flags & IFF_UP)) | |
2224 | goto out; | |
2225 | ||
2226 | netif_device_detach(netdev); | |
2227 | spider_net_stop(netdev); | |
2228 | ||
2229 | spider_net_workaround_rxramfull(card); | |
2230 | spider_net_init_card(card); | |
2231 | ||
2232 | if (spider_net_setup_phy(card)) | |
2233 | goto out; | |
2234 | ||
2235 | spider_net_open(netdev); | |
2236 | spider_net_kick_tx_dma(card); | |
2237 | netif_device_attach(netdev); | |
2238 | ||
2239 | out: | |
2240 | atomic_dec(&card->tx_timeout_task_counter); | |
2241 | } | |
2242 | ||
2243 | /** | |
2244 | * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. | |
2245 | * @netdev: interface device structure | |
2246 | * | |
2247 | * called, if tx hangs. Schedules a task that resets the interface | |
2248 | */ | |
2249 | static void | |
2250 | spider_net_tx_timeout(struct net_device *netdev) | |
2251 | { | |
2252 | struct spider_net_card *card; | |
2253 | ||
2254 | card = netdev_priv(netdev); | |
2255 | atomic_inc(&card->tx_timeout_task_counter); | |
2256 | if (netdev->flags & IFF_UP) | |
2257 | schedule_work(&card->tx_timeout_task); | |
2258 | else | |
2259 | atomic_dec(&card->tx_timeout_task_counter); | |
2260 | card->spider_stats.tx_timeouts++; | |
2261 | } | |
2262 | ||
2263 | static const struct net_device_ops spider_net_ops = { | |
2264 | .ndo_open = spider_net_open, | |
2265 | .ndo_stop = spider_net_stop, | |
2266 | .ndo_start_xmit = spider_net_xmit, | |
2267 | .ndo_set_multicast_list = spider_net_set_multi, | |
2268 | .ndo_set_mac_address = spider_net_set_mac, | |
2269 | .ndo_change_mtu = spider_net_change_mtu, | |
2270 | .ndo_do_ioctl = spider_net_do_ioctl, | |
2271 | .ndo_tx_timeout = spider_net_tx_timeout, | |
2272 | .ndo_validate_addr = eth_validate_addr, | |
2273 | /* HW VLAN */ | |
2274 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2275 | /* poll controller */ | |
2276 | .ndo_poll_controller = spider_net_poll_controller, | |
2277 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
2278 | }; | |
2279 | ||
2280 | /** | |
2281 | * spider_net_setup_netdev_ops - initialization of net_device operations | |
2282 | * @netdev: net_device structure | |
2283 | * | |
2284 | * fills out function pointers in the net_device structure | |
2285 | */ | |
2286 | static void | |
2287 | spider_net_setup_netdev_ops(struct net_device *netdev) | |
2288 | { | |
2289 | netdev->netdev_ops = &spider_net_ops; | |
2290 | netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; | |
2291 | /* ethtool ops */ | |
2292 | netdev->ethtool_ops = &spider_net_ethtool_ops; | |
2293 | } | |
2294 | ||
2295 | /** | |
2296 | * spider_net_setup_netdev - initialization of net_device | |
2297 | * @card: card structure | |
2298 | * | |
2299 | * Returns 0 on success or <0 on failure | |
2300 | * | |
2301 | * spider_net_setup_netdev initializes the net_device structure | |
2302 | **/ | |
2303 | static int | |
2304 | spider_net_setup_netdev(struct spider_net_card *card) | |
2305 | { | |
2306 | int result; | |
2307 | struct net_device *netdev = card->netdev; | |
2308 | struct device_node *dn; | |
2309 | struct sockaddr addr; | |
2310 | const u8 *mac; | |
2311 | ||
2312 | SET_NETDEV_DEV(netdev, &card->pdev->dev); | |
2313 | ||
2314 | pci_set_drvdata(card->pdev, netdev); | |
2315 | ||
2316 | init_timer(&card->tx_timer); | |
2317 | card->tx_timer.function = | |
2318 | (void (*)(unsigned long)) spider_net_cleanup_tx_ring; | |
2319 | card->tx_timer.data = (unsigned long) card; | |
2320 | netdev->irq = card->pdev->irq; | |
2321 | ||
2322 | card->aneg_count = 0; | |
2323 | init_timer(&card->aneg_timer); | |
2324 | card->aneg_timer.function = spider_net_link_phy; | |
2325 | card->aneg_timer.data = (unsigned long) card; | |
2326 | ||
2327 | card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT; | |
2328 | ||
2329 | netif_napi_add(netdev, &card->napi, | |
2330 | spider_net_poll, SPIDER_NET_NAPI_WEIGHT); | |
2331 | ||
2332 | spider_net_setup_netdev_ops(netdev); | |
2333 | ||
2334 | netdev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX; | |
2335 | /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | | |
2336 | * NETIF_F_HW_VLAN_FILTER */ | |
2337 | ||
2338 | netdev->irq = card->pdev->irq; | |
2339 | card->num_rx_ints = 0; | |
2340 | card->ignore_rx_ramfull = 0; | |
2341 | ||
2342 | dn = pci_device_to_OF_node(card->pdev); | |
2343 | if (!dn) | |
2344 | return -EIO; | |
2345 | ||
2346 | mac = of_get_property(dn, "local-mac-address", NULL); | |
2347 | if (!mac) | |
2348 | return -EIO; | |
2349 | memcpy(addr.sa_data, mac, ETH_ALEN); | |
2350 | ||
2351 | result = spider_net_set_mac(netdev, &addr); | |
2352 | if ((result) && (netif_msg_probe(card))) | |
2353 | dev_err(&card->netdev->dev, | |
2354 | "Failed to set MAC address: %i\n", result); | |
2355 | ||
2356 | result = register_netdev(netdev); | |
2357 | if (result) { | |
2358 | if (netif_msg_probe(card)) | |
2359 | dev_err(&card->netdev->dev, | |
2360 | "Couldn't register net_device: %i\n", result); | |
2361 | return result; | |
2362 | } | |
2363 | ||
2364 | if (netif_msg_probe(card)) | |
2365 | pr_info("Initialized device %s.\n", netdev->name); | |
2366 | ||
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | /** | |
2371 | * spider_net_alloc_card - allocates net_device and card structure | |
2372 | * | |
2373 | * returns the card structure or NULL in case of errors | |
2374 | * | |
2375 | * the card and net_device structures are linked to each other | |
2376 | */ | |
2377 | static struct spider_net_card * | |
2378 | spider_net_alloc_card(void) | |
2379 | { | |
2380 | struct net_device *netdev; | |
2381 | struct spider_net_card *card; | |
2382 | size_t alloc_size; | |
2383 | ||
2384 | alloc_size = sizeof(struct spider_net_card) + | |
2385 | (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr); | |
2386 | netdev = alloc_etherdev(alloc_size); | |
2387 | if (!netdev) | |
2388 | return NULL; | |
2389 | ||
2390 | card = netdev_priv(netdev); | |
2391 | card->netdev = netdev; | |
2392 | card->msg_enable = SPIDER_NET_DEFAULT_MSG; | |
2393 | INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); | |
2394 | init_waitqueue_head(&card->waitq); | |
2395 | atomic_set(&card->tx_timeout_task_counter, 0); | |
2396 | ||
2397 | card->rx_chain.num_desc = rx_descriptors; | |
2398 | card->rx_chain.ring = card->darray; | |
2399 | card->tx_chain.num_desc = tx_descriptors; | |
2400 | card->tx_chain.ring = card->darray + rx_descriptors; | |
2401 | ||
2402 | return card; | |
2403 | } | |
2404 | ||
2405 | /** | |
2406 | * spider_net_undo_pci_setup - releases PCI ressources | |
2407 | * @card: card structure | |
2408 | * | |
2409 | * spider_net_undo_pci_setup releases the mapped regions | |
2410 | */ | |
2411 | static void | |
2412 | spider_net_undo_pci_setup(struct spider_net_card *card) | |
2413 | { | |
2414 | iounmap(card->regs); | |
2415 | pci_release_regions(card->pdev); | |
2416 | } | |
2417 | ||
2418 | /** | |
2419 | * spider_net_setup_pci_dev - sets up the device in terms of PCI operations | |
2420 | * @pdev: PCI device | |
2421 | * | |
2422 | * Returns the card structure or NULL if any errors occur | |
2423 | * | |
2424 | * spider_net_setup_pci_dev initializes pdev and together with the | |
2425 | * functions called in spider_net_open configures the device so that | |
2426 | * data can be transferred over it | |
2427 | * The net_device structure is attached to the card structure, if the | |
2428 | * function returns without error. | |
2429 | **/ | |
2430 | static struct spider_net_card * | |
2431 | spider_net_setup_pci_dev(struct pci_dev *pdev) | |
2432 | { | |
2433 | struct spider_net_card *card; | |
2434 | unsigned long mmio_start, mmio_len; | |
2435 | ||
2436 | if (pci_enable_device(pdev)) { | |
2437 | dev_err(&pdev->dev, "Couldn't enable PCI device\n"); | |
2438 | return NULL; | |
2439 | } | |
2440 | ||
2441 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
2442 | dev_err(&pdev->dev, | |
2443 | "Couldn't find proper PCI device base address.\n"); | |
2444 | goto out_disable_dev; | |
2445 | } | |
2446 | ||
2447 | if (pci_request_regions(pdev, spider_net_driver_name)) { | |
2448 | dev_err(&pdev->dev, | |
2449 | "Couldn't obtain PCI resources, aborting.\n"); | |
2450 | goto out_disable_dev; | |
2451 | } | |
2452 | ||
2453 | pci_set_master(pdev); | |
2454 | ||
2455 | card = spider_net_alloc_card(); | |
2456 | if (!card) { | |
2457 | dev_err(&pdev->dev, | |
2458 | "Couldn't allocate net_device structure, aborting.\n"); | |
2459 | goto out_release_regions; | |
2460 | } | |
2461 | card->pdev = pdev; | |
2462 | ||
2463 | /* fetch base address and length of first resource */ | |
2464 | mmio_start = pci_resource_start(pdev, 0); | |
2465 | mmio_len = pci_resource_len(pdev, 0); | |
2466 | ||
2467 | card->netdev->mem_start = mmio_start; | |
2468 | card->netdev->mem_end = mmio_start + mmio_len; | |
2469 | card->regs = ioremap(mmio_start, mmio_len); | |
2470 | ||
2471 | if (!card->regs) { | |
2472 | dev_err(&pdev->dev, | |
2473 | "Couldn't obtain PCI resources, aborting.\n"); | |
2474 | goto out_release_regions; | |
2475 | } | |
2476 | ||
2477 | return card; | |
2478 | ||
2479 | out_release_regions: | |
2480 | pci_release_regions(pdev); | |
2481 | out_disable_dev: | |
2482 | pci_disable_device(pdev); | |
2483 | pci_set_drvdata(pdev, NULL); | |
2484 | return NULL; | |
2485 | } | |
2486 | ||
2487 | /** | |
2488 | * spider_net_probe - initialization of a device | |
2489 | * @pdev: PCI device | |
2490 | * @ent: entry in the device id list | |
2491 | * | |
2492 | * Returns 0 on success, <0 on failure | |
2493 | * | |
2494 | * spider_net_probe initializes pdev and registers a net_device | |
2495 | * structure for it. After that, the device can be ifconfig'ed up | |
2496 | **/ | |
2497 | static int __devinit | |
2498 | spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
2499 | { | |
2500 | int err = -EIO; | |
2501 | struct spider_net_card *card; | |
2502 | ||
2503 | card = spider_net_setup_pci_dev(pdev); | |
2504 | if (!card) | |
2505 | goto out; | |
2506 | ||
2507 | spider_net_workaround_rxramfull(card); | |
2508 | spider_net_init_card(card); | |
2509 | ||
2510 | err = spider_net_setup_phy(card); | |
2511 | if (err) | |
2512 | goto out_undo_pci; | |
2513 | ||
2514 | err = spider_net_setup_netdev(card); | |
2515 | if (err) | |
2516 | goto out_undo_pci; | |
2517 | ||
2518 | return 0; | |
2519 | ||
2520 | out_undo_pci: | |
2521 | spider_net_undo_pci_setup(card); | |
2522 | free_netdev(card->netdev); | |
2523 | out: | |
2524 | return err; | |
2525 | } | |
2526 | ||
2527 | /** | |
2528 | * spider_net_remove - removal of a device | |
2529 | * @pdev: PCI device | |
2530 | * | |
2531 | * Returns 0 on success, <0 on failure | |
2532 | * | |
2533 | * spider_net_remove is called to remove the device and unregisters the | |
2534 | * net_device | |
2535 | **/ | |
2536 | static void __devexit | |
2537 | spider_net_remove(struct pci_dev *pdev) | |
2538 | { | |
2539 | struct net_device *netdev; | |
2540 | struct spider_net_card *card; | |
2541 | ||
2542 | netdev = pci_get_drvdata(pdev); | |
2543 | card = netdev_priv(netdev); | |
2544 | ||
2545 | wait_event(card->waitq, | |
2546 | atomic_read(&card->tx_timeout_task_counter) == 0); | |
2547 | ||
2548 | unregister_netdev(netdev); | |
2549 | ||
2550 | /* switch off card */ | |
2551 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2552 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2553 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2554 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2555 | ||
2556 | spider_net_undo_pci_setup(card); | |
2557 | free_netdev(netdev); | |
2558 | } | |
2559 | ||
2560 | static struct pci_driver spider_net_driver = { | |
2561 | .name = spider_net_driver_name, | |
2562 | .id_table = spider_net_pci_tbl, | |
2563 | .probe = spider_net_probe, | |
2564 | .remove = __devexit_p(spider_net_remove) | |
2565 | }; | |
2566 | ||
2567 | /** | |
2568 | * spider_net_init - init function when the driver is loaded | |
2569 | * | |
2570 | * spider_net_init registers the device driver | |
2571 | */ | |
2572 | static int __init spider_net_init(void) | |
2573 | { | |
2574 | printk(KERN_INFO "Spidernet version %s.\n", VERSION); | |
2575 | ||
2576 | if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { | |
2577 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; | |
2578 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2579 | } | |
2580 | if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { | |
2581 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; | |
2582 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2583 | } | |
2584 | if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { | |
2585 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; | |
2586 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2587 | } | |
2588 | if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { | |
2589 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; | |
2590 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2591 | } | |
2592 | ||
2593 | return pci_register_driver(&spider_net_driver); | |
2594 | } | |
2595 | ||
2596 | /** | |
2597 | * spider_net_cleanup - exit function when driver is unloaded | |
2598 | * | |
2599 | * spider_net_cleanup unregisters the device driver | |
2600 | */ | |
2601 | static void __exit spider_net_cleanup(void) | |
2602 | { | |
2603 | pci_unregister_driver(&spider_net_driver); | |
2604 | } | |
2605 | ||
2606 | module_init(spider_net_init); | |
2607 | module_exit(spider_net_cleanup); |