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aaec0fab JO |
1 | /* |
2 | * Network device driver for Cell Processor-Based Blade | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2005 | |
5 | * | |
6 | * Authors : Utz Bacher <utz.bacher@de.ibm.com> | |
7 | * Jens Osterkamp <Jens.Osterkamp@de.ibm.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
24 | #include <linux/config.h> | |
aaec0fab JO |
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> | |
7c5c220e | 32 | #include <linux/in.h> |
aaec0fab JO |
33 | #include <linux/init.h> |
34 | #include <linux/ioport.h> | |
35 | #include <linux/ip.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/mii.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/netdevice.h> | |
40 | #include <linux/device.h> | |
41 | #include <linux/pci.h> | |
42 | #include <linux/skbuff.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/tcp.h> | |
45 | #include <linux/types.h> | |
11f1a52b | 46 | #include <linux/vmalloc.h> |
aaec0fab JO |
47 | #include <linux/wait.h> |
48 | #include <linux/workqueue.h> | |
49 | #include <asm/bitops.h> | |
50 | #include <asm/pci-bridge.h> | |
51 | #include <net/checksum.h> | |
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 | ||
60 | static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; | |
61 | static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; | |
62 | ||
63 | module_param(rx_descriptors, int, 0644); | |
64 | module_param(tx_descriptors, int, 0644); | |
65 | ||
66 | MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ | |
67 | "in rx chains"); | |
68 | MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ | |
69 | "in tx chain"); | |
70 | ||
71 | char spider_net_driver_name[] = "spidernet"; | |
72 | ||
73 | static struct pci_device_id spider_net_pci_tbl[] = { | |
74 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, | |
75 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, | |
76 | { 0, } | |
77 | }; | |
78 | ||
79 | MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); | |
80 | ||
81 | /** | |
82 | * spider_net_read_reg - reads an SMMIO register of a card | |
83 | * @card: device structure | |
84 | * @reg: register to read from | |
85 | * | |
86 | * returns the content of the specified SMMIO register. | |
87 | */ | |
88 | static u32 | |
89 | spider_net_read_reg(struct spider_net_card *card, u32 reg) | |
90 | { | |
91 | u32 value; | |
92 | ||
93 | value = readl(card->regs + reg); | |
94 | value = le32_to_cpu(value); | |
95 | ||
96 | return value; | |
97 | } | |
98 | ||
99 | /** | |
100 | * spider_net_write_reg - writes to an SMMIO register of a card | |
101 | * @card: device structure | |
102 | * @reg: register to write to | |
103 | * @value: value to write into the specified SMMIO register | |
104 | */ | |
105 | static void | |
106 | spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) | |
107 | { | |
108 | value = cpu_to_le32(value); | |
109 | writel(value, card->regs + reg); | |
110 | } | |
111 | ||
aaec0fab JO |
112 | /** spider_net_write_phy - write to phy register |
113 | * @netdev: adapter to be written to | |
114 | * @mii_id: id of MII | |
115 | * @reg: PHY register | |
116 | * @val: value to be written to phy register | |
117 | * | |
118 | * spider_net_write_phy_register writes to an arbitrary PHY | |
119 | * register via the spider GPCWOPCMD register. We assume the queue does | |
120 | * not run full (not more than 15 commands outstanding). | |
121 | **/ | |
122 | static void | |
123 | spider_net_write_phy(struct net_device *netdev, int mii_id, | |
124 | int reg, int val) | |
125 | { | |
126 | struct spider_net_card *card = netdev_priv(netdev); | |
127 | u32 writevalue; | |
128 | ||
129 | writevalue = ((u32)mii_id << 21) | | |
130 | ((u32)reg << 16) | ((u32)val); | |
131 | ||
132 | spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); | |
133 | } | |
134 | ||
135 | /** spider_net_read_phy - read from phy register | |
136 | * @netdev: network device to be read from | |
137 | * @mii_id: id of MII | |
138 | * @reg: PHY register | |
139 | * | |
140 | * Returns value read from PHY register | |
141 | * | |
142 | * spider_net_write_phy reads from an arbitrary PHY | |
143 | * register via the spider GPCROPCMD register | |
144 | **/ | |
145 | static int | |
146 | spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) | |
147 | { | |
148 | struct spider_net_card *card = netdev_priv(netdev); | |
149 | u32 readvalue; | |
150 | ||
151 | readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); | |
152 | spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); | |
153 | ||
154 | /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT | |
155 | * interrupt, as we poll for the completion of the read operation | |
156 | * in spider_net_read_phy. Should take about 50 us */ | |
157 | do { | |
158 | readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); | |
159 | } while (readvalue & SPIDER_NET_GPREXEC); | |
160 | ||
161 | readvalue &= SPIDER_NET_GPRDAT_MASK; | |
162 | ||
163 | return readvalue; | |
164 | } | |
165 | ||
166 | /** | |
11f1a52b | 167 | * spider_net_rx_irq_off - switch off rx irq on this spider card |
aaec0fab JO |
168 | * @card: device structure |
169 | * | |
11f1a52b | 170 | * switches off rx irq by masking them out in the GHIINTnMSK register |
aaec0fab JO |
171 | */ |
172 | static void | |
11f1a52b | 173 | spider_net_rx_irq_off(struct spider_net_card *card) |
aaec0fab JO |
174 | { |
175 | u32 regvalue; | |
aaec0fab | 176 | |
11f1a52b AB |
177 | regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); |
178 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
179 | } |
180 | ||
181 | /** | |
11f1a52b | 182 | * spider_net_rx_irq_on - switch on rx irq on this spider card |
aaec0fab JO |
183 | * @card: device structure |
184 | * | |
11f1a52b | 185 | * switches on rx irq by enabling them in the GHIINTnMSK register |
aaec0fab JO |
186 | */ |
187 | static void | |
11f1a52b | 188 | spider_net_rx_irq_on(struct spider_net_card *card) |
aaec0fab JO |
189 | { |
190 | u32 regvalue; | |
aaec0fab | 191 | |
11f1a52b AB |
192 | regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; |
193 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
194 | } |
195 | ||
196 | /** | |
197 | * spider_net_set_promisc - sets the unicast address or the promiscuous mode | |
198 | * @card: card structure | |
199 | * | |
200 | * spider_net_set_promisc sets the unicast destination address filter and | |
201 | * thus either allows for non-promisc mode or promisc mode | |
202 | */ | |
203 | static void | |
204 | spider_net_set_promisc(struct spider_net_card *card) | |
205 | { | |
206 | u32 macu, macl; | |
207 | struct net_device *netdev = card->netdev; | |
208 | ||
209 | if (netdev->flags & IFF_PROMISC) { | |
210 | /* clear destination entry 0 */ | |
211 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); | |
212 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); | |
213 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
214 | SPIDER_NET_PROMISC_VALUE); | |
215 | } else { | |
216 | macu = netdev->dev_addr[0]; | |
217 | macu <<= 8; | |
218 | macu |= netdev->dev_addr[1]; | |
219 | memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); | |
220 | ||
221 | macu |= SPIDER_NET_UA_DESCR_VALUE; | |
222 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); | |
223 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); | |
224 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
225 | SPIDER_NET_NONPROMISC_VALUE); | |
226 | } | |
227 | } | |
228 | ||
229 | /** | |
230 | * spider_net_get_mac_address - read mac address from spider card | |
231 | * @card: device structure | |
232 | * | |
233 | * reads MAC address from GMACUNIMACU and GMACUNIMACL registers | |
234 | */ | |
235 | static int | |
236 | spider_net_get_mac_address(struct net_device *netdev) | |
237 | { | |
238 | struct spider_net_card *card = netdev_priv(netdev); | |
239 | u32 macl, macu; | |
240 | ||
241 | macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL); | |
242 | macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU); | |
243 | ||
244 | netdev->dev_addr[0] = (macu >> 24) & 0xff; | |
245 | netdev->dev_addr[1] = (macu >> 16) & 0xff; | |
246 | netdev->dev_addr[2] = (macu >> 8) & 0xff; | |
247 | netdev->dev_addr[3] = macu & 0xff; | |
248 | netdev->dev_addr[4] = (macl >> 8) & 0xff; | |
249 | netdev->dev_addr[5] = macl & 0xff; | |
250 | ||
251 | if (!is_valid_ether_addr(&netdev->dev_addr[0])) | |
252 | return -EINVAL; | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | /** | |
258 | * spider_net_get_descr_status -- returns the status of a descriptor | |
259 | * @descr: descriptor to look at | |
260 | * | |
261 | * returns the status as in the dmac_cmd_status field of the descriptor | |
262 | */ | |
263 | static enum spider_net_descr_status | |
264 | spider_net_get_descr_status(struct spider_net_descr *descr) | |
265 | { | |
266 | u32 cmd_status; | |
11f1a52b | 267 | |
aaec0fab | 268 | cmd_status = descr->dmac_cmd_status; |
aaec0fab JO |
269 | cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT; |
270 | /* no need to mask out any bits, as cmd_status is 32 bits wide only | |
271 | * (and unsigned) */ | |
272 | return cmd_status; | |
273 | } | |
274 | ||
275 | /** | |
276 | * spider_net_set_descr_status -- sets the status of a descriptor | |
277 | * @descr: descriptor to change | |
278 | * @status: status to set in the descriptor | |
279 | * | |
280 | * changes the status to the specified value. Doesn't change other bits | |
281 | * in the status | |
282 | */ | |
283 | static void | |
284 | spider_net_set_descr_status(struct spider_net_descr *descr, | |
285 | enum spider_net_descr_status status) | |
286 | { | |
287 | u32 cmd_status; | |
288 | /* read the status */ | |
aaec0fab JO |
289 | cmd_status = descr->dmac_cmd_status; |
290 | /* clean the upper 4 bits */ | |
291 | cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO; | |
292 | /* add the status to it */ | |
293 | cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT; | |
294 | /* and write it back */ | |
295 | descr->dmac_cmd_status = cmd_status; | |
aaec0fab JO |
296 | } |
297 | ||
298 | /** | |
299 | * spider_net_free_chain - free descriptor chain | |
300 | * @card: card structure | |
301 | * @chain: address of chain | |
302 | * | |
303 | */ | |
304 | static void | |
305 | spider_net_free_chain(struct spider_net_card *card, | |
306 | struct spider_net_descr_chain *chain) | |
307 | { | |
308 | struct spider_net_descr *descr; | |
309 | ||
310 | for (descr = chain->tail; !descr->bus_addr; descr = descr->next) { | |
311 | pci_unmap_single(card->pdev, descr->bus_addr, | |
312 | SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL); | |
313 | descr->bus_addr = 0; | |
314 | } | |
315 | } | |
316 | ||
317 | /** | |
318 | * spider_net_init_chain - links descriptor chain | |
319 | * @card: card structure | |
320 | * @chain: address of chain | |
321 | * @start_descr: address of descriptor array | |
322 | * @no: number of descriptors | |
323 | * | |
324 | * we manage a circular list that mirrors the hardware structure, | |
325 | * except that the hardware uses bus addresses. | |
326 | * | |
327 | * returns 0 on success, <0 on failure | |
328 | */ | |
329 | static int | |
330 | spider_net_init_chain(struct spider_net_card *card, | |
331 | struct spider_net_descr_chain *chain, | |
332 | struct spider_net_descr *start_descr, int no) | |
333 | { | |
334 | int i; | |
335 | struct spider_net_descr *descr; | |
11f1a52b | 336 | dma_addr_t buf; |
aaec0fab | 337 | |
11f1a52b | 338 | atomic_set(&card->rx_chain_refill,0); |
aaec0fab JO |
339 | |
340 | descr = start_descr; | |
341 | memset(descr, 0, sizeof(*descr) * no); | |
342 | ||
343 | /* set up the hardware pointers in each descriptor */ | |
344 | for (i=0; i<no; i++, descr++) { | |
345 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
346 | ||
11f1a52b AB |
347 | buf = pci_map_single(card->pdev, descr, |
348 | SPIDER_NET_DESCR_SIZE, | |
349 | PCI_DMA_BIDIRECTIONAL); | |
aaec0fab | 350 | |
11f1a52b | 351 | if (buf == DMA_ERROR_CODE) |
aaec0fab JO |
352 | goto iommu_error; |
353 | ||
11f1a52b | 354 | descr->bus_addr = buf; |
aaec0fab JO |
355 | descr->next = descr + 1; |
356 | descr->prev = descr - 1; | |
357 | ||
358 | } | |
359 | /* do actual circular list */ | |
360 | (descr-1)->next = start_descr; | |
361 | start_descr->prev = descr-1; | |
362 | ||
363 | descr = start_descr; | |
364 | for (i=0; i < no; i++, descr++) { | |
365 | descr->next_descr_addr = descr->next->bus_addr; | |
366 | } | |
367 | ||
368 | chain->head = start_descr; | |
369 | chain->tail = start_descr; | |
370 | ||
371 | return 0; | |
372 | ||
373 | iommu_error: | |
374 | descr = start_descr; | |
375 | for (i=0; i < no; i++, descr++) | |
376 | if (descr->bus_addr) | |
377 | pci_unmap_single(card->pdev, descr->bus_addr, | |
11f1a52b AB |
378 | SPIDER_NET_DESCR_SIZE, |
379 | PCI_DMA_BIDIRECTIONAL); | |
aaec0fab JO |
380 | return -ENOMEM; |
381 | } | |
382 | ||
383 | /** | |
384 | * spider_net_free_rx_chain_contents - frees descr contents in rx chain | |
385 | * @card: card structure | |
386 | * | |
387 | * returns 0 on success, <0 on failure | |
388 | */ | |
389 | static void | |
390 | spider_net_free_rx_chain_contents(struct spider_net_card *card) | |
391 | { | |
392 | struct spider_net_descr *descr; | |
393 | ||
394 | descr = card->rx_chain.head; | |
395 | while (descr->next != card->rx_chain.head) { | |
396 | if (descr->skb) { | |
397 | dev_kfree_skb(descr->skb); | |
398 | pci_unmap_single(card->pdev, descr->buf_addr, | |
11f1a52b | 399 | SPIDER_NET_MAX_FRAME, |
aaec0fab JO |
400 | PCI_DMA_BIDIRECTIONAL); |
401 | } | |
402 | descr = descr->next; | |
403 | } | |
404 | } | |
405 | ||
406 | /** | |
407 | * spider_net_prepare_rx_descr - reinitializes a rx descriptor | |
408 | * @card: card structure | |
409 | * @descr: descriptor to re-init | |
410 | * | |
411 | * return 0 on succes, <0 on failure | |
412 | * | |
413 | * allocates a new rx skb, iommu-maps it and attaches it to the descriptor. | |
414 | * Activate the descriptor state-wise | |
415 | */ | |
416 | static int | |
417 | spider_net_prepare_rx_descr(struct spider_net_card *card, | |
418 | struct spider_net_descr *descr) | |
419 | { | |
8e0a613b | 420 | dma_addr_t buf; |
aaec0fab JO |
421 | int error = 0; |
422 | int offset; | |
423 | int bufsize; | |
424 | ||
425 | /* we need to round up the buffer size to a multiple of 128 */ | |
11f1a52b | 426 | bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & |
aaec0fab JO |
427 | (~(SPIDER_NET_RXBUF_ALIGN - 1)); |
428 | ||
429 | /* and we need to have it 128 byte aligned, therefore we allocate a | |
430 | * bit more */ | |
431 | /* allocate an skb */ | |
432 | descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1); | |
433 | if (!descr->skb) { | |
11f1a52b AB |
434 | if (netif_msg_rx_err(card) && net_ratelimit()) |
435 | pr_err("Not enough memory to allocate rx buffer\n"); | |
aaec0fab JO |
436 | return -ENOMEM; |
437 | } | |
438 | descr->buf_size = bufsize; | |
439 | descr->result_size = 0; | |
440 | descr->valid_size = 0; | |
441 | descr->data_status = 0; | |
442 | descr->data_error = 0; | |
443 | ||
444 | offset = ((unsigned long)descr->skb->data) & | |
445 | (SPIDER_NET_RXBUF_ALIGN - 1); | |
446 | if (offset) | |
447 | skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); | |
448 | /* io-mmu-map the skb */ | |
8e0a613b | 449 | buf = pci_map_single(card->pdev, descr->skb->data, |
11f1a52b | 450 | SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL); |
8e0a613b AB |
451 | descr->buf_addr = buf; |
452 | if (buf == DMA_ERROR_CODE) { | |
aaec0fab | 453 | dev_kfree_skb_any(descr->skb); |
11f1a52b | 454 | if (netif_msg_rx_err(card) && net_ratelimit()) |
aaec0fab JO |
455 | pr_err("Could not iommu-map rx buffer\n"); |
456 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
457 | } else { | |
458 | descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED; | |
459 | } | |
460 | ||
461 | return error; | |
462 | } | |
463 | ||
464 | /** | |
11f1a52b | 465 | * spider_net_enable_rxchtails - sets RX dmac chain tail addresses |
aaec0fab JO |
466 | * @card: card structure |
467 | * | |
11f1a52b | 468 | * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the |
aaec0fab JO |
469 | * chip by writing to the appropriate register. DMA is enabled in |
470 | * spider_net_enable_rxdmac. | |
471 | */ | |
472 | static void | |
473 | spider_net_enable_rxchtails(struct spider_net_card *card) | |
474 | { | |
475 | /* assume chain is aligned correctly */ | |
476 | spider_net_write_reg(card, SPIDER_NET_GDADCHA , | |
477 | card->rx_chain.tail->bus_addr); | |
478 | } | |
479 | ||
480 | /** | |
481 | * spider_net_enable_rxdmac - enables a receive DMA controller | |
482 | * @card: card structure | |
483 | * | |
484 | * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN | |
485 | * in the GDADMACCNTR register | |
486 | */ | |
487 | static void | |
488 | spider_net_enable_rxdmac(struct spider_net_card *card) | |
489 | { | |
11f1a52b | 490 | wmb(); |
aaec0fab JO |
491 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, |
492 | SPIDER_NET_DMA_RX_VALUE); | |
493 | } | |
494 | ||
495 | /** | |
496 | * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains | |
497 | * @card: card structure | |
498 | * | |
11f1a52b | 499 | * refills descriptors in the rx chain: allocates skbs and iommu-maps them. |
aaec0fab JO |
500 | */ |
501 | static void | |
502 | spider_net_refill_rx_chain(struct spider_net_card *card) | |
503 | { | |
504 | struct spider_net_descr_chain *chain; | |
aaec0fab JO |
505 | |
506 | chain = &card->rx_chain; | |
507 | ||
11f1a52b AB |
508 | /* one context doing the refill (and a second context seeing that |
509 | * and omitting it) is ok. If called by NAPI, we'll be called again | |
510 | * as spider_net_decode_one_descr is called several times. If some | |
511 | * interrupt calls us, the NAPI is about to clean up anyway. */ | |
512 | if (atomic_inc_return(&card->rx_chain_refill) == 1) | |
513 | while (spider_net_get_descr_status(chain->head) == | |
514 | SPIDER_NET_DESCR_NOT_IN_USE) { | |
515 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
516 | break; | |
517 | chain->head = chain->head->next; | |
518 | } | |
aaec0fab | 519 | |
11f1a52b | 520 | atomic_dec(&card->rx_chain_refill); |
aaec0fab JO |
521 | } |
522 | ||
523 | /** | |
524 | * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains | |
525 | * @card: card structure | |
526 | * | |
527 | * returns 0 on success, <0 on failure | |
528 | */ | |
529 | static int | |
530 | spider_net_alloc_rx_skbs(struct spider_net_card *card) | |
531 | { | |
532 | int result; | |
533 | struct spider_net_descr_chain *chain; | |
534 | ||
535 | result = -ENOMEM; | |
536 | ||
537 | chain = &card->rx_chain; | |
538 | /* put at least one buffer into the chain. if this fails, | |
539 | * we've got a problem. if not, spider_net_refill_rx_chain | |
540 | * will do the rest at the end of this function */ | |
541 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
542 | goto error; | |
543 | else | |
544 | chain->head = chain->head->next; | |
545 | ||
546 | /* this will allocate the rest of the rx buffers; if not, it's | |
547 | * business as usual later on */ | |
548 | spider_net_refill_rx_chain(card); | |
11f1a52b | 549 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
550 | return 0; |
551 | ||
552 | error: | |
553 | spider_net_free_rx_chain_contents(card); | |
554 | return result; | |
555 | } | |
556 | ||
557 | /** | |
558 | * spider_net_release_tx_descr - processes a used tx descriptor | |
559 | * @card: card structure | |
560 | * @descr: descriptor to release | |
561 | * | |
562 | * releases a used tx descriptor (unmapping, freeing of skb) | |
563 | */ | |
564 | static void | |
565 | spider_net_release_tx_descr(struct spider_net_card *card, | |
566 | struct spider_net_descr *descr) | |
567 | { | |
568 | struct sk_buff *skb; | |
569 | ||
570 | /* unmap the skb */ | |
571 | skb = descr->skb; | |
572 | pci_unmap_single(card->pdev, descr->buf_addr, skb->len, | |
573 | PCI_DMA_BIDIRECTIONAL); | |
574 | ||
575 | dev_kfree_skb_any(skb); | |
576 | ||
577 | /* set status to not used */ | |
578 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
579 | } | |
580 | ||
581 | /** | |
582 | * spider_net_release_tx_chain - processes sent tx descriptors | |
583 | * @card: adapter structure | |
584 | * @brutal: if set, don't care about whether descriptor seems to be in use | |
585 | * | |
11f1a52b AB |
586 | * returns 0 if the tx ring is empty, otherwise 1. |
587 | * | |
588 | * spider_net_release_tx_chain releases the tx descriptors that spider has | |
589 | * finished with (if non-brutal) or simply release tx descriptors (if brutal). | |
590 | * If some other context is calling this function, we return 1 so that we're | |
591 | * scheduled again (if we were scheduled) and will not loose initiative. | |
aaec0fab | 592 | */ |
11f1a52b | 593 | static int |
aaec0fab JO |
594 | spider_net_release_tx_chain(struct spider_net_card *card, int brutal) |
595 | { | |
596 | struct spider_net_descr_chain *tx_chain = &card->tx_chain; | |
597 | enum spider_net_descr_status status; | |
598 | ||
11f1a52b AB |
599 | if (atomic_inc_return(&card->tx_chain_release) != 1) { |
600 | atomic_dec(&card->tx_chain_release); | |
601 | return 1; | |
602 | } | |
aaec0fab | 603 | |
aaec0fab JO |
604 | for (;;) { |
605 | status = spider_net_get_descr_status(tx_chain->tail); | |
606 | switch (status) { | |
607 | case SPIDER_NET_DESCR_CARDOWNED: | |
11f1a52b AB |
608 | if (!brutal) |
609 | goto out; | |
aaec0fab JO |
610 | /* fallthrough, if we release the descriptors |
611 | * brutally (then we don't care about | |
612 | * SPIDER_NET_DESCR_CARDOWNED) */ | |
613 | case SPIDER_NET_DESCR_RESPONSE_ERROR: | |
614 | case SPIDER_NET_DESCR_PROTECTION_ERROR: | |
615 | case SPIDER_NET_DESCR_FORCE_END: | |
616 | if (netif_msg_tx_err(card)) | |
617 | pr_err("%s: forcing end of tx descriptor " | |
618 | "with status x%02x\n", | |
619 | card->netdev->name, status); | |
620 | card->netdev_stats.tx_dropped++; | |
621 | break; | |
622 | ||
623 | case SPIDER_NET_DESCR_COMPLETE: | |
624 | card->netdev_stats.tx_packets++; | |
625 | card->netdev_stats.tx_bytes += | |
626 | tx_chain->tail->skb->len; | |
627 | break; | |
628 | ||
629 | default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */ | |
630 | goto out; | |
631 | } | |
632 | spider_net_release_tx_descr(card, tx_chain->tail); | |
633 | tx_chain->tail = tx_chain->tail->next; | |
634 | } | |
635 | out: | |
11f1a52b AB |
636 | atomic_dec(&card->tx_chain_release); |
637 | ||
aaec0fab JO |
638 | netif_wake_queue(card->netdev); |
639 | ||
11f1a52b AB |
640 | if (status == SPIDER_NET_DESCR_CARDOWNED) |
641 | return 1; | |
642 | return 0; | |
643 | } | |
aaec0fab | 644 | |
11f1a52b AB |
645 | /** |
646 | * spider_net_cleanup_tx_ring - cleans up the TX ring | |
647 | * @card: card structure | |
648 | * | |
649 | * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use | |
650 | * interrupts to cleanup our TX ring) and returns sent packets to the stack | |
651 | * by freeing them | |
652 | */ | |
653 | static void | |
654 | spider_net_cleanup_tx_ring(struct spider_net_card *card) | |
655 | { | |
656 | if ( (spider_net_release_tx_chain(card, 0)) && | |
657 | (card->netdev->flags & IFF_UP) ) { | |
658 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); | |
659 | } | |
aaec0fab JO |
660 | } |
661 | ||
662 | /** | |
663 | * spider_net_get_multicast_hash - generates hash for multicast filter table | |
664 | * @addr: multicast address | |
665 | * | |
666 | * returns the hash value. | |
667 | * | |
668 | * spider_net_get_multicast_hash calculates a hash value for a given multicast | |
669 | * address, that is used to set the multicast filter tables | |
670 | */ | |
671 | static u8 | |
672 | spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) | |
673 | { | |
aaec0fab JO |
674 | u32 crc; |
675 | u8 hash; | |
11f1a52b AB |
676 | char addr_for_crc[ETH_ALEN] = { 0, }; |
677 | int i, bit; | |
678 | ||
679 | for (i = 0; i < ETH_ALEN * 8; i++) { | |
680 | bit = (addr[i / 8] >> (i % 8)) & 1; | |
681 | addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); | |
682 | } | |
aaec0fab | 683 | |
11f1a52b | 684 | crc = crc32_be(~0, addr_for_crc, netdev->addr_len); |
aaec0fab JO |
685 | |
686 | hash = (crc >> 27); | |
687 | hash <<= 3; | |
688 | hash |= crc & 7; | |
11f1a52b | 689 | hash &= 0xff; |
aaec0fab JO |
690 | |
691 | return hash; | |
692 | } | |
693 | ||
694 | /** | |
695 | * spider_net_set_multi - sets multicast addresses and promisc flags | |
696 | * @netdev: interface device structure | |
697 | * | |
698 | * spider_net_set_multi configures multicast addresses as needed for the | |
699 | * netdev interface. It also sets up multicast, allmulti and promisc | |
700 | * flags appropriately | |
701 | */ | |
702 | static void | |
703 | spider_net_set_multi(struct net_device *netdev) | |
704 | { | |
705 | struct dev_mc_list *mc; | |
706 | u8 hash; | |
707 | int i; | |
708 | u32 reg; | |
709 | struct spider_net_card *card = netdev_priv(netdev); | |
710 | unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = | |
711 | {0, }; | |
712 | ||
713 | spider_net_set_promisc(card); | |
714 | ||
715 | if (netdev->flags & IFF_ALLMULTI) { | |
716 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { | |
717 | set_bit(i, bitmask); | |
718 | } | |
719 | goto write_hash; | |
720 | } | |
721 | ||
722 | /* well, we know, what the broadcast hash value is: it's xfd | |
723 | hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ | |
724 | set_bit(0xfd, bitmask); | |
725 | ||
726 | for (mc = netdev->mc_list; mc; mc = mc->next) { | |
727 | hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr); | |
728 | set_bit(hash, bitmask); | |
729 | } | |
730 | ||
731 | write_hash: | |
732 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { | |
733 | reg = 0; | |
734 | if (test_bit(i * 4, bitmask)) | |
735 | reg += 0x08; | |
736 | reg <<= 8; | |
737 | if (test_bit(i * 4 + 1, bitmask)) | |
738 | reg += 0x08; | |
739 | reg <<= 8; | |
740 | if (test_bit(i * 4 + 2, bitmask)) | |
741 | reg += 0x08; | |
742 | reg <<= 8; | |
743 | if (test_bit(i * 4 + 3, bitmask)) | |
744 | reg += 0x08; | |
745 | ||
746 | spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); | |
747 | } | |
748 | } | |
749 | ||
750 | /** | |
751 | * spider_net_disable_rxdmac - disables the receive DMA controller | |
752 | * @card: card structure | |
753 | * | |
754 | * spider_net_disable_rxdmac terminates processing on the DMA controller by | |
755 | * turing off DMA and issueing a force end | |
756 | */ | |
757 | static void | |
758 | spider_net_disable_rxdmac(struct spider_net_card *card) | |
759 | { | |
760 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
761 | SPIDER_NET_DMA_RX_FEND_VALUE); | |
762 | } | |
763 | ||
764 | /** | |
765 | * spider_net_stop - called upon ifconfig down | |
766 | * @netdev: interface device structure | |
767 | * | |
768 | * always returns 0 | |
769 | */ | |
770 | int | |
771 | spider_net_stop(struct net_device *netdev) | |
772 | { | |
773 | struct spider_net_card *card = netdev_priv(netdev); | |
774 | ||
11f1a52b | 775 | tasklet_kill(&card->rxram_full_tl); |
aaec0fab JO |
776 | netif_poll_disable(netdev); |
777 | netif_carrier_off(netdev); | |
778 | netif_stop_queue(netdev); | |
11f1a52b | 779 | del_timer_sync(&card->tx_timer); |
aaec0fab JO |
780 | |
781 | /* disable/mask all interrupts */ | |
782 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); | |
783 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); | |
784 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); | |
785 | ||
543cec51 JO |
786 | /* free_irq(netdev->irq, netdev);*/ |
787 | free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev); | |
788 | ||
aaec0fab JO |
789 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
790 | SPIDER_NET_DMA_TX_FEND_VALUE); | |
791 | ||
792 | /* turn off DMA, force end */ | |
793 | spider_net_disable_rxdmac(card); | |
794 | ||
795 | /* release chains */ | |
796 | spider_net_release_tx_chain(card, 1); | |
797 | ||
aaec0fab JO |
798 | spider_net_free_chain(card, &card->tx_chain); |
799 | spider_net_free_chain(card, &card->rx_chain); | |
800 | ||
801 | return 0; | |
802 | } | |
803 | ||
804 | /** | |
805 | * spider_net_get_next_tx_descr - returns the next available tx descriptor | |
806 | * @card: device structure to get descriptor from | |
807 | * | |
808 | * returns the address of the next descriptor, or NULL if not available. | |
809 | */ | |
810 | static struct spider_net_descr * | |
811 | spider_net_get_next_tx_descr(struct spider_net_card *card) | |
812 | { | |
813 | /* check, if head points to not-in-use descr */ | |
814 | if ( spider_net_get_descr_status(card->tx_chain.head) == | |
815 | SPIDER_NET_DESCR_NOT_IN_USE ) { | |
816 | return card->tx_chain.head; | |
817 | } else { | |
818 | return NULL; | |
819 | } | |
820 | } | |
821 | ||
822 | /** | |
823 | * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field | |
824 | * @descr: descriptor structure to fill out | |
825 | * @skb: packet to consider | |
826 | * | |
827 | * fills out the command and status field of the descriptor structure, | |
11f1a52b | 828 | * depending on hardware checksum settings. |
aaec0fab JO |
829 | */ |
830 | static void | |
831 | spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr, | |
832 | struct sk_buff *skb) | |
833 | { | |
11f1a52b AB |
834 | /* make sure the other fields in the descriptor are written */ |
835 | wmb(); | |
836 | ||
aaec0fab JO |
837 | if (skb->ip_summed != CHECKSUM_HW) { |
838 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS; | |
839 | return; | |
840 | } | |
841 | ||
842 | /* is packet ip? | |
843 | * if yes: tcp? udp? */ | |
844 | if (skb->protocol == htons(ETH_P_IP)) { | |
11f1a52b | 845 | if (skb->nh.iph->protocol == IPPROTO_TCP) |
aaec0fab | 846 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS; |
11f1a52b | 847 | else if (skb->nh.iph->protocol == IPPROTO_UDP) |
aaec0fab | 848 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS; |
11f1a52b AB |
849 | else /* the stack should checksum non-tcp and non-udp |
850 | packets on his own: NETIF_F_IP_CSUM */ | |
aaec0fab | 851 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS; |
aaec0fab JO |
852 | } |
853 | } | |
854 | ||
855 | /** | |
856 | * spider_net_prepare_tx_descr - fill tx descriptor with skb data | |
857 | * @card: card structure | |
858 | * @descr: descriptor structure to fill out | |
859 | * @skb: packet to use | |
860 | * | |
861 | * returns 0 on success, <0 on failure. | |
862 | * | |
863 | * fills out the descriptor structure with skb data and len. Copies data, | |
864 | * if needed (32bit DMA!) | |
865 | */ | |
866 | static int | |
867 | spider_net_prepare_tx_descr(struct spider_net_card *card, | |
868 | struct spider_net_descr *descr, | |
869 | struct sk_buff *skb) | |
870 | { | |
11f1a52b AB |
871 | dma_addr_t buf; |
872 | ||
873 | buf = pci_map_single(card->pdev, skb->data, | |
874 | skb->len, PCI_DMA_BIDIRECTIONAL); | |
8e0a613b | 875 | if (buf == DMA_ERROR_CODE) { |
11f1a52b | 876 | if (netif_msg_tx_err(card) && net_ratelimit()) |
aaec0fab JO |
877 | pr_err("could not iommu-map packet (%p, %i). " |
878 | "Dropping packet\n", skb->data, skb->len); | |
879 | return -ENOMEM; | |
880 | } | |
881 | ||
8e0a613b | 882 | descr->buf_addr = buf; |
aaec0fab JO |
883 | descr->buf_size = skb->len; |
884 | descr->skb = skb; | |
885 | descr->data_status = 0; | |
886 | ||
aaec0fab JO |
887 | spider_net_set_txdescr_cmdstat(descr,skb); |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
892 | /** | |
893 | * spider_net_kick_tx_dma - enables TX DMA processing | |
894 | * @card: card structure | |
895 | * @descr: descriptor address to enable TX processing at | |
896 | * | |
897 | * spider_net_kick_tx_dma writes the current tx chain head as start address | |
898 | * of the tx descriptor chain and enables the transmission DMA engine | |
899 | */ | |
900 | static void | |
901 | spider_net_kick_tx_dma(struct spider_net_card *card, | |
902 | struct spider_net_descr *descr) | |
903 | { | |
904 | /* this is the only descriptor in the output chain. | |
905 | * Enable TX DMA */ | |
906 | ||
907 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
908 | descr->bus_addr); | |
909 | ||
910 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
911 | SPIDER_NET_DMA_TX_VALUE); | |
912 | } | |
913 | ||
914 | /** | |
915 | * spider_net_xmit - transmits a frame over the device | |
916 | * @skb: packet to send out | |
917 | * @netdev: interface device structure | |
918 | * | |
919 | * returns 0 on success, <0 on failure | |
920 | */ | |
921 | static int | |
922 | spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) | |
923 | { | |
924 | struct spider_net_card *card = netdev_priv(netdev); | |
925 | struct spider_net_descr *descr; | |
926 | int result; | |
927 | ||
11f1a52b | 928 | spider_net_release_tx_chain(card, 0); |
aaec0fab | 929 | |
11f1a52b | 930 | descr = spider_net_get_next_tx_descr(card); |
aaec0fab | 931 | |
11f1a52b AB |
932 | if (!descr) |
933 | goto error; | |
aaec0fab JO |
934 | |
935 | result = spider_net_prepare_tx_descr(card, descr, skb); | |
936 | if (result) | |
937 | goto error; | |
938 | ||
939 | card->tx_chain.head = card->tx_chain.head->next; | |
940 | ||
aaec0fab | 941 | if (spider_net_get_descr_status(descr->prev) != |
11f1a52b AB |
942 | SPIDER_NET_DESCR_CARDOWNED) { |
943 | /* make sure the current descriptor is in memory. Then | |
944 | * kicking it on again makes sense, if the previous is not | |
945 | * card-owned anymore. Check the previous descriptor twice | |
946 | * to omit an mb() in heavy traffic cases */ | |
947 | mb(); | |
948 | if (spider_net_get_descr_status(descr->prev) != | |
949 | SPIDER_NET_DESCR_CARDOWNED) | |
950 | spider_net_kick_tx_dma(card, descr); | |
951 | } | |
952 | ||
953 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); | |
aaec0fab JO |
954 | |
955 | return NETDEV_TX_OK; | |
956 | ||
957 | error: | |
958 | card->netdev_stats.tx_dropped++; | |
11f1a52b | 959 | return NETDEV_TX_BUSY; |
aaec0fab JO |
960 | } |
961 | ||
962 | /** | |
963 | * spider_net_do_ioctl - called for device ioctls | |
964 | * @netdev: interface device structure | |
965 | * @ifr: request parameter structure for ioctl | |
966 | * @cmd: command code for ioctl | |
967 | * | |
968 | * returns 0 on success, <0 on failure. Currently, we have no special ioctls. | |
969 | * -EOPNOTSUPP is returned, if an unknown ioctl was requested | |
970 | */ | |
971 | static int | |
972 | spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
973 | { | |
974 | switch (cmd) { | |
975 | default: | |
976 | return -EOPNOTSUPP; | |
977 | } | |
978 | } | |
979 | ||
980 | /** | |
981 | * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on | |
982 | * @descr: descriptor to process | |
983 | * @card: card structure | |
11f1a52b | 984 | * @napi: whether caller is in NAPI context |
aaec0fab JO |
985 | * |
986 | * returns 1 on success, 0 if no packet was passed to the stack | |
987 | * | |
988 | * iommu-unmaps the skb, fills out skb structure and passes the data to the | |
989 | * stack. The descriptor state is not changed. | |
990 | */ | |
991 | static int | |
992 | spider_net_pass_skb_up(struct spider_net_descr *descr, | |
11f1a52b | 993 | struct spider_net_card *card, int napi) |
aaec0fab JO |
994 | { |
995 | struct sk_buff *skb; | |
996 | struct net_device *netdev; | |
997 | u32 data_status, data_error; | |
998 | ||
999 | data_status = descr->data_status; | |
1000 | data_error = descr->data_error; | |
1001 | ||
1002 | netdev = card->netdev; | |
1003 | ||
11f1a52b AB |
1004 | /* unmap descriptor */ |
1005 | pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME, | |
aaec0fab JO |
1006 | PCI_DMA_BIDIRECTIONAL); |
1007 | ||
1008 | /* the cases we'll throw away the packet immediately */ | |
11f1a52b AB |
1009 | if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) { |
1010 | if (netif_msg_rx_err(card)) | |
1011 | pr_err("error in received descriptor found, " | |
1012 | "data_status=x%08x, data_error=x%08x\n", | |
1013 | data_status, data_error); | |
aaec0fab | 1014 | return 0; |
11f1a52b | 1015 | } |
aaec0fab | 1016 | |
11f1a52b | 1017 | skb = descr->skb; |
aaec0fab JO |
1018 | skb->dev = netdev; |
1019 | skb_put(skb, descr->valid_size); | |
1020 | ||
1021 | /* the card seems to add 2 bytes of junk in front | |
1022 | * of the ethernet frame */ | |
1023 | #define SPIDER_MISALIGN 2 | |
1024 | skb_pull(skb, SPIDER_MISALIGN); | |
1025 | skb->protocol = eth_type_trans(skb, netdev); | |
1026 | ||
1027 | /* checksum offload */ | |
1028 | if (card->options.rx_csum) { | |
11f1a52b AB |
1029 | if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == |
1030 | SPIDER_NET_DATA_STATUS_CKSUM_MASK) && | |
1031 | !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) | |
aaec0fab JO |
1032 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1033 | else | |
1034 | skb->ip_summed = CHECKSUM_NONE; | |
11f1a52b | 1035 | } else |
aaec0fab | 1036 | skb->ip_summed = CHECKSUM_NONE; |
aaec0fab JO |
1037 | |
1038 | if (data_status & SPIDER_NET_VLAN_PACKET) { | |
1039 | /* further enhancements: HW-accel VLAN | |
1040 | * vlan_hwaccel_receive_skb | |
1041 | */ | |
1042 | } | |
1043 | ||
1044 | /* pass skb up to stack */ | |
11f1a52b AB |
1045 | if (napi) |
1046 | netif_receive_skb(skb); | |
1047 | else | |
1048 | netif_rx_ni(skb); | |
aaec0fab JO |
1049 | |
1050 | /* update netdevice statistics */ | |
1051 | card->netdev_stats.rx_packets++; | |
1052 | card->netdev_stats.rx_bytes += skb->len; | |
1053 | ||
1054 | return 1; | |
1055 | } | |
1056 | ||
1057 | /** | |
11f1a52b | 1058 | * spider_net_decode_one_descr - processes an rx descriptor |
aaec0fab | 1059 | * @card: card structure |
11f1a52b | 1060 | * @napi: whether caller is in NAPI context |
aaec0fab JO |
1061 | * |
1062 | * returns 1 if a packet has been sent to the stack, otherwise 0 | |
1063 | * | |
1064 | * processes an rx descriptor by iommu-unmapping the data buffer and passing | |
11f1a52b AB |
1065 | * the packet up to the stack. This function is called in softirq |
1066 | * context, e.g. either bottom half from interrupt or NAPI polling context | |
aaec0fab JO |
1067 | */ |
1068 | static int | |
11f1a52b | 1069 | spider_net_decode_one_descr(struct spider_net_card *card, int napi) |
aaec0fab JO |
1070 | { |
1071 | enum spider_net_descr_status status; | |
1072 | struct spider_net_descr *descr; | |
1073 | struct spider_net_descr_chain *chain; | |
1074 | int result; | |
1075 | ||
1076 | chain = &card->rx_chain; | |
1077 | descr = chain->tail; | |
1078 | ||
1079 | status = spider_net_get_descr_status(descr); | |
1080 | ||
1081 | if (status == SPIDER_NET_DESCR_CARDOWNED) { | |
1082 | /* nothing in the descriptor yet */ | |
11f1a52b AB |
1083 | result=0; |
1084 | goto out; | |
aaec0fab JO |
1085 | } |
1086 | ||
1087 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) { | |
11f1a52b | 1088 | /* not initialized yet, the ring must be empty */ |
aaec0fab | 1089 | spider_net_refill_rx_chain(card); |
11f1a52b AB |
1090 | spider_net_enable_rxdmac(card); |
1091 | result=0; | |
1092 | goto out; | |
aaec0fab JO |
1093 | } |
1094 | ||
11f1a52b | 1095 | /* descriptor definitively used -- move on tail */ |
aaec0fab JO |
1096 | chain->tail = descr->next; |
1097 | ||
1098 | result = 0; | |
1099 | if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || | |
1100 | (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || | |
1101 | (status == SPIDER_NET_DESCR_FORCE_END) ) { | |
1102 | if (netif_msg_rx_err(card)) | |
1103 | pr_err("%s: dropping RX descriptor with state %d\n", | |
1104 | card->netdev->name, status); | |
1105 | card->netdev_stats.rx_dropped++; | |
11f1a52b AB |
1106 | pci_unmap_single(card->pdev, descr->buf_addr, |
1107 | SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL); | |
1108 | dev_kfree_skb_irq(descr->skb); | |
aaec0fab JO |
1109 | goto refill; |
1110 | } | |
1111 | ||
1112 | if ( (status != SPIDER_NET_DESCR_COMPLETE) && | |
1113 | (status != SPIDER_NET_DESCR_FRAME_END) ) { | |
1114 | if (netif_msg_rx_err(card)) | |
1115 | pr_err("%s: RX descriptor with state %d\n", | |
1116 | card->netdev->name, status); | |
1117 | goto refill; | |
1118 | } | |
1119 | ||
1120 | /* ok, we've got a packet in descr */ | |
11f1a52b | 1121 | result = spider_net_pass_skb_up(descr, card, napi); |
aaec0fab JO |
1122 | refill: |
1123 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
1124 | /* change the descriptor state: */ | |
11f1a52b AB |
1125 | if (!napi) |
1126 | spider_net_refill_rx_chain(card); | |
1127 | out: | |
aaec0fab JO |
1128 | return result; |
1129 | } | |
1130 | ||
1131 | /** | |
1132 | * spider_net_poll - NAPI poll function called by the stack to return packets | |
1133 | * @netdev: interface device structure | |
1134 | * @budget: number of packets we can pass to the stack at most | |
1135 | * | |
1136 | * returns 0 if no more packets available to the driver/stack. Returns 1, | |
1137 | * if the quota is exceeded, but the driver has still packets. | |
1138 | * | |
1139 | * spider_net_poll returns all packets from the rx descriptors to the stack | |
1140 | * (using netif_receive_skb). If all/enough packets are up, the driver | |
1141 | * reenables interrupts and returns 0. If not, 1 is returned. | |
1142 | */ | |
1143 | static int | |
1144 | spider_net_poll(struct net_device *netdev, int *budget) | |
1145 | { | |
1146 | struct spider_net_card *card = netdev_priv(netdev); | |
1147 | int packets_to_do, packets_done = 0; | |
1148 | int no_more_packets = 0; | |
1149 | ||
1150 | packets_to_do = min(*budget, netdev->quota); | |
1151 | ||
1152 | while (packets_to_do) { | |
11f1a52b | 1153 | if (spider_net_decode_one_descr(card, 1)) { |
aaec0fab JO |
1154 | packets_done++; |
1155 | packets_to_do--; | |
1156 | } else { | |
1157 | /* no more packets for the stack */ | |
1158 | no_more_packets = 1; | |
1159 | break; | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | netdev->quota -= packets_done; | |
1164 | *budget -= packets_done; | |
11f1a52b | 1165 | spider_net_refill_rx_chain(card); |
aaec0fab JO |
1166 | |
1167 | /* if all packets are in the stack, enable interrupts and return 0 */ | |
1168 | /* if not, return 1 */ | |
1169 | if (no_more_packets) { | |
1170 | netif_rx_complete(netdev); | |
1171 | spider_net_rx_irq_on(card); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | return 1; | |
1176 | } | |
1177 | ||
1178 | /** | |
1179 | * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card | |
1180 | * @netdev: interface device structure | |
1181 | * @grp: vlan_group structure that is registered (NULL on destroying interface) | |
1182 | */ | |
1183 | static void | |
1184 | spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp) | |
1185 | { | |
1186 | /* further enhancement... yet to do */ | |
1187 | return; | |
1188 | } | |
1189 | ||
1190 | /** | |
1191 | * spider_net_vlan_rx_add - adds VLAN id to the card filter | |
1192 | * @netdev: interface device structure | |
1193 | * @vid: VLAN id to add | |
1194 | */ | |
1195 | static void | |
1196 | spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid) | |
1197 | { | |
1198 | /* further enhancement... yet to do */ | |
1199 | /* add vid to card's VLAN filter table */ | |
1200 | return; | |
1201 | } | |
1202 | ||
1203 | /** | |
1204 | * spider_net_vlan_rx_kill - removes VLAN id to the card filter | |
1205 | * @netdev: interface device structure | |
1206 | * @vid: VLAN id to remove | |
1207 | */ | |
1208 | static void | |
1209 | spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid) | |
1210 | { | |
1211 | /* further enhancement... yet to do */ | |
1212 | /* remove vid from card's VLAN filter table */ | |
1213 | } | |
1214 | ||
1215 | /** | |
1216 | * spider_net_get_stats - get interface statistics | |
1217 | * @netdev: interface device structure | |
1218 | * | |
1219 | * returns the interface statistics residing in the spider_net_card struct | |
1220 | */ | |
1221 | static struct net_device_stats * | |
1222 | spider_net_get_stats(struct net_device *netdev) | |
1223 | { | |
1224 | struct spider_net_card *card = netdev_priv(netdev); | |
1225 | struct net_device_stats *stats = &card->netdev_stats; | |
1226 | return stats; | |
1227 | } | |
1228 | ||
1229 | /** | |
1230 | * spider_net_change_mtu - changes the MTU of an interface | |
1231 | * @netdev: interface device structure | |
1232 | * @new_mtu: new MTU value | |
1233 | * | |
1234 | * returns 0 on success, <0 on failure | |
1235 | */ | |
1236 | static int | |
1237 | spider_net_change_mtu(struct net_device *netdev, int new_mtu) | |
1238 | { | |
1239 | /* no need to re-alloc skbs or so -- the max mtu is about 2.3k | |
1240 | * and mtu is outbound only anyway */ | |
1241 | if ( (new_mtu < SPIDER_NET_MIN_MTU ) || | |
1242 | (new_mtu > SPIDER_NET_MAX_MTU) ) | |
1243 | return -EINVAL; | |
1244 | netdev->mtu = new_mtu; | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | /** | |
1249 | * spider_net_set_mac - sets the MAC of an interface | |
1250 | * @netdev: interface device structure | |
1251 | * @ptr: pointer to new MAC address | |
1252 | * | |
1253 | * Returns 0 on success, <0 on failure. Currently, we don't support this | |
1254 | * and will always return EOPNOTSUPP. | |
1255 | */ | |
1256 | static int | |
1257 | spider_net_set_mac(struct net_device *netdev, void *p) | |
1258 | { | |
1259 | struct spider_net_card *card = netdev_priv(netdev); | |
054034db | 1260 | u32 macl, macu, regvalue; |
aaec0fab JO |
1261 | struct sockaddr *addr = p; |
1262 | ||
aaec0fab JO |
1263 | if (!is_valid_ether_addr(addr->sa_data)) |
1264 | return -EADDRNOTAVAIL; | |
1265 | ||
054034db JO |
1266 | /* switch off GMACTPE and GMACRPE */ |
1267 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1268 | regvalue &= ~((1 << 5) | (1 << 6)); | |
1269 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1270 | ||
1271 | /* write mac */ | |
aaec0fab JO |
1272 | macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) + |
1273 | (addr->sa_data[2]<<8) + (addr->sa_data[3]); | |
1274 | macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]); | |
1275 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); | |
1276 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); | |
1277 | ||
054034db JO |
1278 | /* switch GMACTPE and GMACRPE back on */ |
1279 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1280 | regvalue |= ((1 << 5) | (1 << 6)); | |
1281 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1282 | ||
aaec0fab JO |
1283 | spider_net_set_promisc(card); |
1284 | ||
1285 | /* look up, whether we have been successful */ | |
1286 | if (spider_net_get_mac_address(netdev)) | |
1287 | return -EADDRNOTAVAIL; | |
1288 | if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len)) | |
1289 | return -EADDRNOTAVAIL; | |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | /** | |
1295 | * spider_net_enable_txdmac - enables a TX DMA controller | |
1296 | * @card: card structure | |
1297 | * | |
1298 | * spider_net_enable_txdmac enables the TX DMA controller by setting the | |
1299 | * descriptor chain tail address | |
1300 | */ | |
1301 | static void | |
1302 | spider_net_enable_txdmac(struct spider_net_card *card) | |
1303 | { | |
1304 | /* assume chain is aligned correctly */ | |
1305 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
1306 | card->tx_chain.tail->bus_addr); | |
1307 | } | |
1308 | ||
11f1a52b AB |
1309 | /** |
1310 | * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt | |
1311 | * @card: card structure | |
1312 | * | |
1313 | * spider_net_handle_rxram_full empties the RX ring so that spider can put | |
1314 | * more packets in it and empty its RX RAM. This is called in bottom half | |
1315 | * context | |
1316 | */ | |
1317 | static void | |
1318 | spider_net_handle_rxram_full(struct spider_net_card *card) | |
1319 | { | |
1320 | while (spider_net_decode_one_descr(card, 0)) | |
1321 | ; | |
1322 | spider_net_enable_rxchtails(card); | |
1323 | spider_net_enable_rxdmac(card); | |
1324 | netif_rx_schedule(card->netdev); | |
1325 | } | |
1326 | ||
aaec0fab JO |
1327 | /** |
1328 | * spider_net_handle_error_irq - handles errors raised by an interrupt | |
1329 | * @card: card structure | |
1330 | * @status_reg: interrupt status register 0 (GHIINT0STS) | |
1331 | * | |
1332 | * spider_net_handle_error_irq treats or ignores all error conditions | |
1333 | * found when an interrupt is presented | |
1334 | */ | |
1335 | static void | |
1336 | spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg) | |
1337 | { | |
1338 | u32 error_reg1, error_reg2; | |
1339 | u32 i; | |
1340 | int show_error = 1; | |
1341 | ||
1342 | error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); | |
1343 | error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); | |
1344 | ||
1345 | /* check GHIINT0STS ************************************/ | |
1346 | if (status_reg) | |
1347 | for (i = 0; i < 32; i++) | |
1348 | if (status_reg & (1<<i)) | |
1349 | switch (i) | |
1350 | { | |
1351 | /* let error_reg1 and error_reg2 evaluation decide, what to do | |
1352 | case SPIDER_NET_PHYINT: | |
1353 | case SPIDER_NET_GMAC2INT: | |
1354 | case SPIDER_NET_GMAC1INT: | |
1355 | case SPIDER_NET_GIPSINT: | |
1356 | case SPIDER_NET_GFIFOINT: | |
1357 | case SPIDER_NET_DMACINT: | |
1358 | case SPIDER_NET_GSYSINT: | |
1359 | break; */ | |
1360 | ||
1361 | case SPIDER_NET_GPWOPCMPINT: | |
1362 | /* PHY write operation completed */ | |
1363 | show_error = 0; | |
1364 | break; | |
1365 | case SPIDER_NET_GPROPCMPINT: | |
1366 | /* PHY read operation completed */ | |
1367 | /* we don't use semaphores, as we poll for the completion | |
1368 | * of the read operation in spider_net_read_phy. Should take | |
1369 | * about 50 us */ | |
1370 | show_error = 0; | |
1371 | break; | |
1372 | case SPIDER_NET_GPWFFINT: | |
1373 | /* PHY command queue full */ | |
1374 | if (netif_msg_intr(card)) | |
1375 | pr_err("PHY write queue full\n"); | |
1376 | show_error = 0; | |
1377 | break; | |
1378 | ||
1379 | /* case SPIDER_NET_GRMDADRINT: not used. print a message */ | |
1380 | /* case SPIDER_NET_GRMARPINT: not used. print a message */ | |
1381 | /* case SPIDER_NET_GRMMPINT: not used. print a message */ | |
1382 | ||
1383 | case SPIDER_NET_GDTDEN0INT: | |
1384 | /* someone has set TX_DMA_EN to 0 */ | |
1385 | show_error = 0; | |
1386 | break; | |
1387 | ||
1388 | case SPIDER_NET_GDDDEN0INT: /* fallthrough */ | |
1389 | case SPIDER_NET_GDCDEN0INT: /* fallthrough */ | |
1390 | case SPIDER_NET_GDBDEN0INT: /* fallthrough */ | |
1391 | case SPIDER_NET_GDADEN0INT: | |
1392 | /* someone has set RX_DMA_EN to 0 */ | |
1393 | show_error = 0; | |
1394 | break; | |
1395 | ||
1396 | /* RX interrupts */ | |
1397 | case SPIDER_NET_GDDFDCINT: | |
1398 | case SPIDER_NET_GDCFDCINT: | |
1399 | case SPIDER_NET_GDBFDCINT: | |
1400 | case SPIDER_NET_GDAFDCINT: | |
1401 | /* case SPIDER_NET_GDNMINT: not used. print a message */ | |
1402 | /* case SPIDER_NET_GCNMINT: not used. print a message */ | |
1403 | /* case SPIDER_NET_GBNMINT: not used. print a message */ | |
1404 | /* case SPIDER_NET_GANMINT: not used. print a message */ | |
1405 | /* case SPIDER_NET_GRFNMINT: not used. print a message */ | |
1406 | show_error = 0; | |
1407 | break; | |
1408 | ||
1409 | /* TX interrupts */ | |
1410 | case SPIDER_NET_GDTFDCINT: | |
1411 | show_error = 0; | |
1412 | break; | |
1413 | case SPIDER_NET_GTTEDINT: | |
1414 | show_error = 0; | |
1415 | break; | |
1416 | case SPIDER_NET_GDTDCEINT: | |
1417 | /* chain end. If a descriptor should be sent, kick off | |
1418 | * tx dma | |
1419 | if (card->tx_chain.tail == card->tx_chain.head) | |
1420 | spider_net_kick_tx_dma(card); | |
1421 | show_error = 0; */ | |
1422 | break; | |
1423 | ||
1424 | /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ | |
1425 | /* case SPIDER_NET_GFREECNTINT: not used. print a message */ | |
1426 | } | |
1427 | ||
1428 | /* check GHIINT1STS ************************************/ | |
1429 | if (error_reg1) | |
1430 | for (i = 0; i < 32; i++) | |
1431 | if (error_reg1 & (1<<i)) | |
1432 | switch (i) | |
1433 | { | |
1434 | case SPIDER_NET_GTMFLLINT: | |
11f1a52b | 1435 | if (netif_msg_intr(card) && net_ratelimit()) |
aaec0fab JO |
1436 | pr_err("Spider TX RAM full\n"); |
1437 | show_error = 0; | |
1438 | break; | |
11f1a52b AB |
1439 | case SPIDER_NET_GRFDFLLINT: /* fallthrough */ |
1440 | case SPIDER_NET_GRFCFLLINT: /* fallthrough */ | |
1441 | case SPIDER_NET_GRFBFLLINT: /* fallthrough */ | |
1442 | case SPIDER_NET_GRFAFLLINT: /* fallthrough */ | |
aaec0fab | 1443 | case SPIDER_NET_GRMFLLINT: |
11f1a52b | 1444 | if (netif_msg_intr(card) && net_ratelimit()) |
4e5077b6 | 1445 | pr_debug("Spider RX RAM full, incoming packets " |
11f1a52b AB |
1446 | "might be discarded!\n"); |
1447 | spider_net_rx_irq_off(card); | |
1448 | tasklet_schedule(&card->rxram_full_tl); | |
1449 | show_error = 0; | |
aaec0fab JO |
1450 | break; |
1451 | ||
1452 | /* case SPIDER_NET_GTMSHTINT: problem, print a message */ | |
1453 | case SPIDER_NET_GDTINVDINT: | |
1454 | /* allrighty. tx from previous descr ok */ | |
1455 | show_error = 0; | |
1456 | break; | |
aaec0fab JO |
1457 | |
1458 | /* chain end */ | |
1459 | case SPIDER_NET_GDDDCEINT: /* fallthrough */ | |
1460 | case SPIDER_NET_GDCDCEINT: /* fallthrough */ | |
1461 | case SPIDER_NET_GDBDCEINT: /* fallthrough */ | |
1462 | case SPIDER_NET_GDADCEINT: | |
1463 | if (netif_msg_intr(card)) | |
1464 | pr_err("got descriptor chain end interrupt, " | |
1465 | "restarting DMAC %c.\n", | |
1466 | 'D'+i-SPIDER_NET_GDDDCEINT); | |
1467 | spider_net_refill_rx_chain(card); | |
11f1a52b | 1468 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
1469 | show_error = 0; |
1470 | break; | |
1471 | ||
1472 | /* invalid descriptor */ | |
1473 | case SPIDER_NET_GDDINVDINT: /* fallthrough */ | |
1474 | case SPIDER_NET_GDCINVDINT: /* fallthrough */ | |
1475 | case SPIDER_NET_GDBINVDINT: /* fallthrough */ | |
1476 | case SPIDER_NET_GDAINVDINT: | |
1477 | /* could happen when rx chain is full */ | |
1478 | spider_net_refill_rx_chain(card); | |
11f1a52b | 1479 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
1480 | show_error = 0; |
1481 | break; | |
1482 | ||
1483 | /* case SPIDER_NET_GDTRSERINT: problem, print a message */ | |
1484 | /* case SPIDER_NET_GDDRSERINT: problem, print a message */ | |
1485 | /* case SPIDER_NET_GDCRSERINT: problem, print a message */ | |
1486 | /* case SPIDER_NET_GDBRSERINT: problem, print a message */ | |
1487 | /* case SPIDER_NET_GDARSERINT: problem, print a message */ | |
1488 | /* case SPIDER_NET_GDSERINT: problem, print a message */ | |
1489 | /* case SPIDER_NET_GDTPTERINT: problem, print a message */ | |
1490 | /* case SPIDER_NET_GDDPTERINT: problem, print a message */ | |
1491 | /* case SPIDER_NET_GDCPTERINT: problem, print a message */ | |
1492 | /* case SPIDER_NET_GDBPTERINT: problem, print a message */ | |
1493 | /* case SPIDER_NET_GDAPTERINT: problem, print a message */ | |
1494 | default: | |
1495 | show_error = 1; | |
1496 | break; | |
1497 | } | |
1498 | ||
1499 | /* check GHIINT2STS ************************************/ | |
1500 | if (error_reg2) | |
1501 | for (i = 0; i < 32; i++) | |
1502 | if (error_reg2 & (1<<i)) | |
1503 | switch (i) | |
1504 | { | |
1505 | /* there is nothing we can (want to) do at this time. Log a | |
1506 | * message, we can switch on and off the specific values later on | |
1507 | case SPIDER_NET_GPROPERINT: | |
1508 | case SPIDER_NET_GMCTCRSNGINT: | |
1509 | case SPIDER_NET_GMCTLCOLINT: | |
1510 | case SPIDER_NET_GMCTTMOTINT: | |
1511 | case SPIDER_NET_GMCRCAERINT: | |
1512 | case SPIDER_NET_GMCRCALERINT: | |
1513 | case SPIDER_NET_GMCRALNERINT: | |
1514 | case SPIDER_NET_GMCROVRINT: | |
1515 | case SPIDER_NET_GMCRRNTINT: | |
1516 | case SPIDER_NET_GMCRRXERINT: | |
1517 | case SPIDER_NET_GTITCSERINT: | |
1518 | case SPIDER_NET_GTIFMTERINT: | |
1519 | case SPIDER_NET_GTIPKTRVKINT: | |
1520 | case SPIDER_NET_GTISPINGINT: | |
1521 | case SPIDER_NET_GTISADNGINT: | |
1522 | case SPIDER_NET_GTISPDNGINT: | |
1523 | case SPIDER_NET_GRIFMTERINT: | |
1524 | case SPIDER_NET_GRIPKTRVKINT: | |
1525 | case SPIDER_NET_GRISPINGINT: | |
1526 | case SPIDER_NET_GRISADNGINT: | |
1527 | case SPIDER_NET_GRISPDNGINT: | |
1528 | break; | |
1529 | */ | |
1530 | default: | |
1531 | break; | |
1532 | } | |
1533 | ||
1534 | if ((show_error) && (netif_msg_intr(card))) | |
1535 | pr_err("Got error interrupt, GHIINT0STS = 0x%08x, " | |
1536 | "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", | |
1537 | status_reg, error_reg1, error_reg2); | |
1538 | ||
1539 | /* clear interrupt sources */ | |
1540 | spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); | |
1541 | spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); | |
1542 | } | |
1543 | ||
1544 | /** | |
1545 | * spider_net_interrupt - interrupt handler for spider_net | |
1546 | * @irq: interupt number | |
1547 | * @ptr: pointer to net_device | |
1548 | * @regs: PU registers | |
1549 | * | |
1550 | * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no | |
1551 | * interrupt found raised by card. | |
1552 | * | |
1553 | * This is the interrupt handler, that turns off | |
1554 | * interrupts for this device and makes the stack poll the driver | |
1555 | */ | |
1556 | static irqreturn_t | |
1557 | spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
1558 | { | |
1559 | struct net_device *netdev = ptr; | |
1560 | struct spider_net_card *card = netdev_priv(netdev); | |
1561 | u32 status_reg; | |
1562 | ||
1563 | status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); | |
1564 | ||
1565 | if (!status_reg) | |
1566 | return IRQ_NONE; | |
1567 | ||
aaec0fab JO |
1568 | if (status_reg & SPIDER_NET_RXINT ) { |
1569 | spider_net_rx_irq_off(card); | |
1570 | netif_rx_schedule(netdev); | |
1571 | } | |
1572 | ||
11f1a52b AB |
1573 | if (status_reg & SPIDER_NET_ERRINT ) |
1574 | spider_net_handle_error_irq(card, status_reg); | |
aaec0fab JO |
1575 | |
1576 | /* clear interrupt sources */ | |
1577 | spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); | |
1578 | ||
1579 | return IRQ_HANDLED; | |
1580 | } | |
1581 | ||
1582 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1583 | /** | |
1584 | * spider_net_poll_controller - artificial interrupt for netconsole etc. | |
1585 | * @netdev: interface device structure | |
1586 | * | |
1587 | * see Documentation/networking/netconsole.txt | |
1588 | */ | |
1589 | static void | |
1590 | spider_net_poll_controller(struct net_device *netdev) | |
1591 | { | |
1592 | disable_irq(netdev->irq); | |
1593 | spider_net_interrupt(netdev->irq, netdev, NULL); | |
1594 | enable_irq(netdev->irq); | |
1595 | } | |
1596 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1597 | ||
1598 | /** | |
1599 | * spider_net_init_card - initializes the card | |
1600 | * @card: card structure | |
1601 | * | |
1602 | * spider_net_init_card initializes the card so that other registers can | |
1603 | * be used | |
1604 | */ | |
1605 | static void | |
1606 | spider_net_init_card(struct spider_net_card *card) | |
1607 | { | |
1608 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1609 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1610 | ||
1611 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1612 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
1613 | } | |
1614 | ||
1615 | /** | |
1616 | * spider_net_enable_card - enables the card by setting all kinds of regs | |
1617 | * @card: card structure | |
1618 | * | |
1619 | * spider_net_enable_card sets a lot of SMMIO registers to enable the device | |
1620 | */ | |
1621 | static void | |
1622 | spider_net_enable_card(struct spider_net_card *card) | |
1623 | { | |
1624 | int i; | |
1625 | /* the following array consists of (register),(value) pairs | |
1626 | * that are set in this function. A register of 0 ends the list */ | |
1627 | u32 regs[][2] = { | |
1628 | { SPIDER_NET_GRESUMINTNUM, 0 }, | |
1629 | { SPIDER_NET_GREINTNUM, 0 }, | |
1630 | ||
1631 | /* set interrupt frame number registers */ | |
1632 | /* clear the single DMA engine registers first */ | |
1633 | { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1634 | { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1635 | { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1636 | { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1637 | /* then set, what we really need */ | |
1638 | { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, | |
1639 | ||
1640 | /* timer counter registers and stuff */ | |
1641 | { SPIDER_NET_GFREECNNUM, 0 }, | |
1642 | { SPIDER_NET_GONETIMENUM, 0 }, | |
1643 | { SPIDER_NET_GTOUTFRMNUM, 0 }, | |
1644 | ||
1645 | /* RX mode setting */ | |
1646 | { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, | |
1647 | /* TX mode setting */ | |
1648 | { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, | |
1649 | /* IPSEC mode setting */ | |
1650 | { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, | |
1651 | ||
1652 | { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, | |
1653 | ||
1654 | { SPIDER_NET_GMRWOLCTRL, 0 }, | |
1655 | { SPIDER_NET_GTESTMD, 0 }, | |
1656 | ||
1657 | { SPIDER_NET_GMACINTEN, 0 }, | |
1658 | ||
1659 | /* flow control stuff */ | |
1660 | { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, | |
1661 | { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, | |
1662 | ||
1663 | { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, | |
1664 | { 0, 0} | |
1665 | }; | |
1666 | ||
1667 | i = 0; | |
1668 | while (regs[i][0]) { | |
1669 | spider_net_write_reg(card, regs[i][0], regs[i][1]); | |
1670 | i++; | |
1671 | } | |
1672 | ||
1673 | /* clear unicast filter table entries 1 to 14 */ | |
1674 | for (i = 1; i <= 14; i++) { | |
1675 | spider_net_write_reg(card, | |
1676 | SPIDER_NET_GMRUAFILnR + i * 8, | |
1677 | 0x00080000); | |
1678 | spider_net_write_reg(card, | |
1679 | SPIDER_NET_GMRUAFILnR + i * 8 + 4, | |
1680 | 0x00000000); | |
1681 | } | |
1682 | ||
1683 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); | |
1684 | ||
1685 | spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); | |
1686 | ||
1687 | /* set chain tail adress for RX chains and | |
1688 | * enable DMA */ | |
1689 | spider_net_enable_rxchtails(card); | |
1690 | spider_net_enable_rxdmac(card); | |
1691 | ||
1692 | spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); | |
1693 | ||
1694 | /* set chain tail adress for TX chain */ | |
1695 | spider_net_enable_txdmac(card); | |
1696 | ||
1697 | spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, | |
1698 | SPIDER_NET_LENLMT_VALUE); | |
1699 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, | |
1700 | SPIDER_NET_MACMODE_VALUE); | |
1701 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, | |
1702 | SPIDER_NET_OPMODE_VALUE); | |
1703 | ||
1704 | /* set interrupt mask registers */ | |
1705 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, | |
1706 | SPIDER_NET_INT0_MASK_VALUE); | |
1707 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, | |
1708 | SPIDER_NET_INT1_MASK_VALUE); | |
1709 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, | |
1710 | SPIDER_NET_INT2_MASK_VALUE); | |
1711 | } | |
1712 | ||
1713 | /** | |
1714 | * spider_net_open - called upon ifonfig up | |
1715 | * @netdev: interface device structure | |
1716 | * | |
1717 | * returns 0 on success, <0 on failure | |
1718 | * | |
1719 | * spider_net_open allocates all the descriptors and memory needed for | |
1720 | * operation, sets up multicast list and enables interrupts | |
1721 | */ | |
1722 | int | |
1723 | spider_net_open(struct net_device *netdev) | |
1724 | { | |
1725 | struct spider_net_card *card = netdev_priv(netdev); | |
1726 | int result; | |
1727 | ||
1728 | result = -ENOMEM; | |
1729 | if (spider_net_init_chain(card, &card->tx_chain, | |
1730 | card->descr, tx_descriptors)) | |
1731 | goto alloc_tx_failed; | |
1732 | if (spider_net_init_chain(card, &card->rx_chain, | |
1733 | card->descr + tx_descriptors, rx_descriptors)) | |
1734 | goto alloc_rx_failed; | |
1735 | ||
1736 | /* allocate rx skbs */ | |
1737 | if (spider_net_alloc_rx_skbs(card)) | |
1738 | goto alloc_skbs_failed; | |
1739 | ||
1740 | spider_net_set_multi(netdev); | |
1741 | ||
1742 | /* further enhancement: setup hw vlan, if needed */ | |
1743 | ||
1744 | result = -EBUSY; | |
1745 | if (request_irq(netdev->irq, spider_net_interrupt, | |
1746 | SA_SHIRQ, netdev->name, netdev)) | |
1747 | goto register_int_failed; | |
1748 | ||
1749 | spider_net_enable_card(card); | |
1750 | ||
543cec51 JO |
1751 | netif_start_queue(netdev); |
1752 | netif_carrier_on(netdev); | |
1753 | netif_poll_enable(netdev); | |
1754 | ||
aaec0fab JO |
1755 | return 0; |
1756 | ||
1757 | register_int_failed: | |
1758 | spider_net_free_rx_chain_contents(card); | |
1759 | alloc_skbs_failed: | |
1760 | spider_net_free_chain(card, &card->rx_chain); | |
1761 | alloc_rx_failed: | |
1762 | spider_net_free_chain(card, &card->tx_chain); | |
1763 | alloc_tx_failed: | |
1764 | return result; | |
1765 | } | |
1766 | ||
1767 | /** | |
1768 | * spider_net_setup_phy - setup PHY | |
1769 | * @card: card structure | |
1770 | * | |
1771 | * returns 0 on success, <0 on failure | |
1772 | * | |
1773 | * spider_net_setup_phy is used as part of spider_net_probe. Sets | |
1774 | * the PHY to 1000 Mbps | |
1775 | **/ | |
1776 | static int | |
1777 | spider_net_setup_phy(struct spider_net_card *card) | |
1778 | { | |
1779 | struct mii_phy *phy = &card->phy; | |
1780 | ||
1781 | spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, | |
1782 | SPIDER_NET_DMASEL_VALUE); | |
1783 | spider_net_write_reg(card, SPIDER_NET_GPCCTRL, | |
1784 | SPIDER_NET_PHY_CTRL_VALUE); | |
1785 | phy->mii_id = 1; | |
1786 | phy->dev = card->netdev; | |
1787 | phy->mdio_read = spider_net_read_phy; | |
1788 | phy->mdio_write = spider_net_write_phy; | |
1789 | ||
1790 | mii_phy_probe(phy, phy->mii_id); | |
1791 | ||
1792 | if (phy->def->ops->setup_forced) | |
1793 | phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL); | |
1794 | ||
1795 | /* the following two writes could be moved to sungem_phy.c */ | |
1796 | /* enable fiber mode */ | |
1797 | spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x9020); | |
1798 | /* LEDs active in both modes, autosense prio = fiber */ | |
1799 | spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x945f); | |
1800 | ||
53abbf7e JO |
1801 | /* switch off fibre autoneg */ |
1802 | spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0xfc01); | |
1803 | spider_net_write_phy(card->netdev, 1, 0x0b, 0x0004); | |
1804 | ||
aaec0fab JO |
1805 | phy->def->ops->read_link(phy); |
1806 | pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name, | |
1807 | phy->speed, phy->duplex==1 ? "Full" : "Half"); | |
1808 | ||
1809 | return 0; | |
1810 | } | |
1811 | ||
1812 | /** | |
1813 | * spider_net_download_firmware - loads firmware into the adapter | |
1814 | * @card: card structure | |
11f1a52b | 1815 | * @firmware_ptr: pointer to firmware data |
aaec0fab | 1816 | * |
11f1a52b AB |
1817 | * spider_net_download_firmware loads the firmware data into the |
1818 | * adapter. It assumes the length etc. to be allright. | |
aaec0fab | 1819 | */ |
0d3ea166 | 1820 | static int |
aaec0fab | 1821 | spider_net_download_firmware(struct spider_net_card *card, |
11f1a52b | 1822 | u8 *firmware_ptr) |
aaec0fab JO |
1823 | { |
1824 | int sequencer, i; | |
11f1a52b | 1825 | u32 *fw_ptr = (u32 *)firmware_ptr; |
aaec0fab JO |
1826 | |
1827 | /* stop sequencers */ | |
1828 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1829 | SPIDER_NET_STOP_SEQ_VALUE); | |
1830 | ||
11f1a52b AB |
1831 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
1832 | sequencer++) { | |
aaec0fab JO |
1833 | spider_net_write_reg(card, |
1834 | SPIDER_NET_GSnPRGADR + sequencer * 8, 0); | |
11f1a52b | 1835 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
aaec0fab JO |
1836 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
1837 | sequencer * 8, *fw_ptr); | |
1838 | fw_ptr++; | |
1839 | } | |
1840 | } | |
1841 | ||
0d3ea166 AB |
1842 | if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) |
1843 | return -EIO; | |
1844 | ||
aaec0fab JO |
1845 | spider_net_write_reg(card, SPIDER_NET_GSINIT, |
1846 | SPIDER_NET_RUN_SEQ_VALUE); | |
0d3ea166 AB |
1847 | |
1848 | return 0; | |
aaec0fab JO |
1849 | } |
1850 | ||
1851 | /** | |
1852 | * spider_net_init_firmware - reads in firmware parts | |
1853 | * @card: card structure | |
1854 | * | |
1855 | * Returns 0 on success, <0 on failure | |
1856 | * | |
1857 | * spider_net_init_firmware opens the sequencer firmware and does some basic | |
1858 | * checks. This function opens and releases the firmware structure. A call | |
1859 | * to download the firmware is performed before the release. | |
1860 | * | |
1861 | * Firmware format | |
1862 | * =============== | |
1863 | * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being | |
1864 | * the program for each sequencer. Use the command | |
1865 | * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ | |
1866 | * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ | |
1867 | * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin | |
1868 | * | |
1869 | * to generate spider_fw.bin, if you have sequencer programs with something | |
1870 | * like the following contents for each sequencer: | |
1871 | * <ONE LINE COMMENT> | |
1872 | * <FIRST 4-BYTES-WORD FOR SEQUENCER> | |
1873 | * <SECOND 4-BYTES-WORD FOR SEQUENCER> | |
1874 | * ... | |
1875 | * <1024th 4-BYTES-WORD FOR SEQUENCER> | |
1876 | */ | |
1877 | static int | |
1878 | spider_net_init_firmware(struct spider_net_card *card) | |
1879 | { | |
11f1a52b | 1880 | struct firmware *firmware = NULL; |
030d6753 | 1881 | struct device_node *dn; |
11f1a52b AB |
1882 | u8 *fw_prop = NULL; |
1883 | int err = -ENOENT; | |
1884 | int fw_size; | |
aaec0fab | 1885 | |
030d6753 | 1886 | if (request_firmware((const struct firmware **)&firmware, |
11f1a52b AB |
1887 | SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { |
1888 | if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && | |
1889 | netif_msg_probe(card) ) { | |
1890 | pr_err("Incorrect size of spidernet firmware in " \ | |
1891 | "filesystem. Looking in host firmware...\n"); | |
1892 | goto try_host_fw; | |
1893 | } | |
1894 | err = spider_net_download_firmware(card, firmware->data); | |
030d6753 | 1895 | |
11f1a52b AB |
1896 | release_firmware(firmware); |
1897 | if (err) | |
1898 | goto try_host_fw; | |
030d6753 | 1899 | |
11f1a52b | 1900 | goto done; |
aaec0fab JO |
1901 | } |
1902 | ||
11f1a52b AB |
1903 | try_host_fw: |
1904 | dn = pci_device_to_OF_node(card->pdev); | |
1905 | if (!dn) | |
1906 | goto out_err; | |
1907 | ||
1908 | fw_prop = (u8 *)get_property(dn, "firmware", &fw_size); | |
1909 | if (!fw_prop) | |
1910 | goto out_err; | |
1911 | ||
1912 | if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && | |
1913 | netif_msg_probe(card) ) { | |
1914 | pr_err("Incorrect size of spidernet firmware in " \ | |
1915 | "host firmware\n"); | |
1916 | goto done; | |
aaec0fab JO |
1917 | } |
1918 | ||
11f1a52b | 1919 | err = spider_net_download_firmware(card, fw_prop); |
aaec0fab | 1920 | |
11f1a52b AB |
1921 | done: |
1922 | return err; | |
1923 | out_err: | |
1924 | if (netif_msg_probe(card)) | |
1925 | pr_err("Couldn't find spidernet firmware in filesystem " \ | |
1926 | "or host firmware\n"); | |
aaec0fab JO |
1927 | return err; |
1928 | } | |
1929 | ||
1930 | /** | |
1931 | * spider_net_workaround_rxramfull - work around firmware bug | |
1932 | * @card: card structure | |
1933 | * | |
1934 | * no return value | |
1935 | **/ | |
1936 | static void | |
1937 | spider_net_workaround_rxramfull(struct spider_net_card *card) | |
1938 | { | |
1939 | int i, sequencer = 0; | |
1940 | ||
1941 | /* cancel reset */ | |
1942 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1943 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
1944 | ||
1945 | /* empty sequencer data */ | |
11f1a52b AB |
1946 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
1947 | sequencer++) { | |
aaec0fab JO |
1948 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
1949 | sequencer * 8, 0x0); | |
11f1a52b | 1950 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
aaec0fab JO |
1951 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
1952 | sequencer * 8, 0x0); | |
1953 | } | |
1954 | } | |
1955 | ||
1956 | /* set sequencer operation */ | |
1957 | spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); | |
1958 | ||
1959 | /* reset */ | |
1960 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1961 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1962 | } | |
1963 | ||
1964 | /** | |
1965 | * spider_net_tx_timeout_task - task scheduled by the watchdog timeout | |
1966 | * function (to be called not under interrupt status) | |
1967 | * @data: data, is interface device structure | |
1968 | * | |
1969 | * called as task when tx hangs, resets interface (if interface is up) | |
1970 | */ | |
1971 | static void | |
1972 | spider_net_tx_timeout_task(void *data) | |
1973 | { | |
1974 | struct net_device *netdev = data; | |
1975 | struct spider_net_card *card = netdev_priv(netdev); | |
1976 | ||
1977 | if (!(netdev->flags & IFF_UP)) | |
1978 | goto out; | |
1979 | ||
1980 | netif_device_detach(netdev); | |
1981 | spider_net_stop(netdev); | |
1982 | ||
1983 | spider_net_workaround_rxramfull(card); | |
1984 | spider_net_init_card(card); | |
1985 | ||
1986 | if (spider_net_setup_phy(card)) | |
1987 | goto out; | |
1988 | if (spider_net_init_firmware(card)) | |
1989 | goto out; | |
1990 | ||
1991 | spider_net_open(netdev); | |
1992 | spider_net_kick_tx_dma(card, card->tx_chain.head); | |
1993 | netif_device_attach(netdev); | |
1994 | ||
1995 | out: | |
1996 | atomic_dec(&card->tx_timeout_task_counter); | |
1997 | } | |
1998 | ||
1999 | /** | |
2000 | * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. | |
2001 | * @netdev: interface device structure | |
2002 | * | |
2003 | * called, if tx hangs. Schedules a task that resets the interface | |
2004 | */ | |
2005 | static void | |
2006 | spider_net_tx_timeout(struct net_device *netdev) | |
2007 | { | |
2008 | struct spider_net_card *card; | |
2009 | ||
2010 | card = netdev_priv(netdev); | |
2011 | atomic_inc(&card->tx_timeout_task_counter); | |
2012 | if (netdev->flags & IFF_UP) | |
2013 | schedule_work(&card->tx_timeout_task); | |
2014 | else | |
2015 | atomic_dec(&card->tx_timeout_task_counter); | |
2016 | } | |
2017 | ||
2018 | /** | |
2019 | * spider_net_setup_netdev_ops - initialization of net_device operations | |
2020 | * @netdev: net_device structure | |
2021 | * | |
2022 | * fills out function pointers in the net_device structure | |
2023 | */ | |
2024 | static void | |
2025 | spider_net_setup_netdev_ops(struct net_device *netdev) | |
2026 | { | |
2027 | netdev->open = &spider_net_open; | |
2028 | netdev->stop = &spider_net_stop; | |
2029 | netdev->hard_start_xmit = &spider_net_xmit; | |
2030 | netdev->get_stats = &spider_net_get_stats; | |
2031 | netdev->set_multicast_list = &spider_net_set_multi; | |
2032 | netdev->set_mac_address = &spider_net_set_mac; | |
2033 | netdev->change_mtu = &spider_net_change_mtu; | |
2034 | netdev->do_ioctl = &spider_net_do_ioctl; | |
2035 | /* tx watchdog */ | |
2036 | netdev->tx_timeout = &spider_net_tx_timeout; | |
2037 | netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; | |
2038 | /* NAPI */ | |
2039 | netdev->poll = &spider_net_poll; | |
2040 | netdev->weight = SPIDER_NET_NAPI_WEIGHT; | |
2041 | /* HW VLAN */ | |
2042 | netdev->vlan_rx_register = &spider_net_vlan_rx_reg; | |
2043 | netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add; | |
2044 | netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill; | |
2045 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2046 | /* poll controller */ | |
2047 | netdev->poll_controller = &spider_net_poll_controller; | |
2048 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
2049 | /* ethtool ops */ | |
2050 | netdev->ethtool_ops = &spider_net_ethtool_ops; | |
2051 | } | |
2052 | ||
2053 | /** | |
2054 | * spider_net_setup_netdev - initialization of net_device | |
2055 | * @card: card structure | |
2056 | * | |
2057 | * Returns 0 on success or <0 on failure | |
2058 | * | |
2059 | * spider_net_setup_netdev initializes the net_device structure | |
2060 | **/ | |
2061 | static int | |
2062 | spider_net_setup_netdev(struct spider_net_card *card) | |
2063 | { | |
2064 | int result; | |
2065 | struct net_device *netdev = card->netdev; | |
2066 | struct device_node *dn; | |
2067 | struct sockaddr addr; | |
2068 | u8 *mac; | |
2069 | ||
2070 | SET_MODULE_OWNER(netdev); | |
2071 | SET_NETDEV_DEV(netdev, &card->pdev->dev); | |
2072 | ||
2073 | pci_set_drvdata(card->pdev, netdev); | |
11f1a52b AB |
2074 | |
2075 | atomic_set(&card->tx_chain_release,0); | |
2076 | card->rxram_full_tl.data = (unsigned long) card; | |
2077 | card->rxram_full_tl.func = | |
2078 | (void (*)(unsigned long)) spider_net_handle_rxram_full; | |
2079 | init_timer(&card->tx_timer); | |
2080 | card->tx_timer.function = | |
2081 | (void (*)(unsigned long)) spider_net_cleanup_tx_ring; | |
2082 | card->tx_timer.data = (unsigned long) card; | |
aaec0fab JO |
2083 | netdev->irq = card->pdev->irq; |
2084 | ||
2085 | card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT; | |
2086 | ||
2087 | spider_net_setup_netdev_ops(netdev); | |
2088 | ||
8dfc914a | 2089 | netdev->features = NETIF_F_HW_CSUM; |
aaec0fab JO |
2090 | /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | |
2091 | * NETIF_F_HW_VLAN_FILTER */ | |
2092 | ||
2093 | netdev->irq = card->pdev->irq; | |
2094 | ||
2095 | dn = pci_device_to_OF_node(card->pdev); | |
543cec51 JO |
2096 | if (!dn) |
2097 | return -EIO; | |
2098 | ||
aaec0fab | 2099 | mac = (u8 *)get_property(dn, "local-mac-address", NULL); |
543cec51 JO |
2100 | if (!mac) |
2101 | return -EIO; | |
aaec0fab JO |
2102 | memcpy(addr.sa_data, mac, ETH_ALEN); |
2103 | ||
2104 | result = spider_net_set_mac(netdev, &addr); | |
2105 | if ((result) && (netif_msg_probe(card))) | |
2106 | pr_err("Failed to set MAC address: %i\n", result); | |
2107 | ||
2108 | result = register_netdev(netdev); | |
2109 | if (result) { | |
2110 | if (netif_msg_probe(card)) | |
2111 | pr_err("Couldn't register net_device: %i\n", | |
2112 | result); | |
2113 | return result; | |
2114 | } | |
2115 | ||
2116 | if (netif_msg_probe(card)) | |
2117 | pr_info("Initialized device %s.\n", netdev->name); | |
2118 | ||
2119 | return 0; | |
2120 | } | |
2121 | ||
2122 | /** | |
2123 | * spider_net_alloc_card - allocates net_device and card structure | |
2124 | * | |
2125 | * returns the card structure or NULL in case of errors | |
2126 | * | |
2127 | * the card and net_device structures are linked to each other | |
2128 | */ | |
2129 | static struct spider_net_card * | |
2130 | spider_net_alloc_card(void) | |
2131 | { | |
2132 | struct net_device *netdev; | |
2133 | struct spider_net_card *card; | |
2134 | size_t alloc_size; | |
2135 | ||
2136 | alloc_size = sizeof (*card) + | |
2137 | sizeof (struct spider_net_descr) * rx_descriptors + | |
2138 | sizeof (struct spider_net_descr) * tx_descriptors; | |
2139 | netdev = alloc_etherdev(alloc_size); | |
2140 | if (!netdev) | |
2141 | return NULL; | |
2142 | ||
2143 | card = netdev_priv(netdev); | |
2144 | card->netdev = netdev; | |
2145 | card->msg_enable = SPIDER_NET_DEFAULT_MSG; | |
2146 | INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev); | |
2147 | init_waitqueue_head(&card->waitq); | |
2148 | atomic_set(&card->tx_timeout_task_counter, 0); | |
2149 | ||
2150 | return card; | |
2151 | } | |
2152 | ||
2153 | /** | |
2154 | * spider_net_undo_pci_setup - releases PCI ressources | |
2155 | * @card: card structure | |
2156 | * | |
2157 | * spider_net_undo_pci_setup releases the mapped regions | |
2158 | */ | |
2159 | static void | |
2160 | spider_net_undo_pci_setup(struct spider_net_card *card) | |
2161 | { | |
2162 | iounmap(card->regs); | |
2163 | pci_release_regions(card->pdev); | |
2164 | } | |
2165 | ||
2166 | /** | |
2167 | * spider_net_setup_pci_dev - sets up the device in terms of PCI operations | |
2168 | * @card: card structure | |
2169 | * @pdev: PCI device | |
2170 | * | |
2171 | * Returns the card structure or NULL if any errors occur | |
2172 | * | |
2173 | * spider_net_setup_pci_dev initializes pdev and together with the | |
2174 | * functions called in spider_net_open configures the device so that | |
2175 | * data can be transferred over it | |
2176 | * The net_device structure is attached to the card structure, if the | |
2177 | * function returns without error. | |
2178 | **/ | |
2179 | static struct spider_net_card * | |
2180 | spider_net_setup_pci_dev(struct pci_dev *pdev) | |
2181 | { | |
2182 | struct spider_net_card *card; | |
2183 | unsigned long mmio_start, mmio_len; | |
2184 | ||
2185 | if (pci_enable_device(pdev)) { | |
2186 | pr_err("Couldn't enable PCI device\n"); | |
2187 | return NULL; | |
2188 | } | |
2189 | ||
2190 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
2191 | pr_err("Couldn't find proper PCI device base address.\n"); | |
2192 | goto out_disable_dev; | |
2193 | } | |
2194 | ||
2195 | if (pci_request_regions(pdev, spider_net_driver_name)) { | |
2196 | pr_err("Couldn't obtain PCI resources, aborting.\n"); | |
2197 | goto out_disable_dev; | |
2198 | } | |
2199 | ||
2200 | pci_set_master(pdev); | |
2201 | ||
2202 | card = spider_net_alloc_card(); | |
2203 | if (!card) { | |
2204 | pr_err("Couldn't allocate net_device structure, " | |
2205 | "aborting.\n"); | |
2206 | goto out_release_regions; | |
2207 | } | |
2208 | card->pdev = pdev; | |
2209 | ||
2210 | /* fetch base address and length of first resource */ | |
2211 | mmio_start = pci_resource_start(pdev, 0); | |
2212 | mmio_len = pci_resource_len(pdev, 0); | |
2213 | ||
2214 | card->netdev->mem_start = mmio_start; | |
2215 | card->netdev->mem_end = mmio_start + mmio_len; | |
2216 | card->regs = ioremap(mmio_start, mmio_len); | |
2217 | ||
2218 | if (!card->regs) { | |
2219 | pr_err("Couldn't obtain PCI resources, aborting.\n"); | |
2220 | goto out_release_regions; | |
2221 | } | |
2222 | ||
2223 | return card; | |
2224 | ||
2225 | out_release_regions: | |
2226 | pci_release_regions(pdev); | |
2227 | out_disable_dev: | |
2228 | pci_disable_device(pdev); | |
2229 | pci_set_drvdata(pdev, NULL); | |
2230 | return NULL; | |
2231 | } | |
2232 | ||
2233 | /** | |
2234 | * spider_net_probe - initialization of a device | |
2235 | * @pdev: PCI device | |
2236 | * @ent: entry in the device id list | |
2237 | * | |
2238 | * Returns 0 on success, <0 on failure | |
2239 | * | |
2240 | * spider_net_probe initializes pdev and registers a net_device | |
2241 | * structure for it. After that, the device can be ifconfig'ed up | |
2242 | **/ | |
2243 | static int __devinit | |
2244 | spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
2245 | { | |
2246 | int err = -EIO; | |
2247 | struct spider_net_card *card; | |
2248 | ||
2249 | card = spider_net_setup_pci_dev(pdev); | |
2250 | if (!card) | |
2251 | goto out; | |
2252 | ||
2253 | spider_net_workaround_rxramfull(card); | |
2254 | spider_net_init_card(card); | |
2255 | ||
2256 | err = spider_net_setup_phy(card); | |
2257 | if (err) | |
2258 | goto out_undo_pci; | |
2259 | ||
2260 | err = spider_net_init_firmware(card); | |
2261 | if (err) | |
2262 | goto out_undo_pci; | |
2263 | ||
2264 | err = spider_net_setup_netdev(card); | |
2265 | if (err) | |
2266 | goto out_undo_pci; | |
2267 | ||
2268 | return 0; | |
2269 | ||
2270 | out_undo_pci: | |
2271 | spider_net_undo_pci_setup(card); | |
2272 | free_netdev(card->netdev); | |
2273 | out: | |
2274 | return err; | |
2275 | } | |
2276 | ||
2277 | /** | |
2278 | * spider_net_remove - removal of a device | |
2279 | * @pdev: PCI device | |
2280 | * | |
2281 | * Returns 0 on success, <0 on failure | |
2282 | * | |
2283 | * spider_net_remove is called to remove the device and unregisters the | |
2284 | * net_device | |
2285 | **/ | |
2286 | static void __devexit | |
2287 | spider_net_remove(struct pci_dev *pdev) | |
2288 | { | |
2289 | struct net_device *netdev; | |
2290 | struct spider_net_card *card; | |
2291 | ||
2292 | netdev = pci_get_drvdata(pdev); | |
2293 | card = netdev_priv(netdev); | |
2294 | ||
2295 | wait_event(card->waitq, | |
2296 | atomic_read(&card->tx_timeout_task_counter) == 0); | |
2297 | ||
2298 | unregister_netdev(netdev); | |
543cec51 JO |
2299 | |
2300 | /* switch off card */ | |
2301 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2302 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2303 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2304 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2305 | ||
aaec0fab JO |
2306 | spider_net_undo_pci_setup(card); |
2307 | free_netdev(netdev); | |
aaec0fab JO |
2308 | } |
2309 | ||
2310 | static struct pci_driver spider_net_driver = { | |
aaec0fab JO |
2311 | .name = spider_net_driver_name, |
2312 | .id_table = spider_net_pci_tbl, | |
2313 | .probe = spider_net_probe, | |
2314 | .remove = __devexit_p(spider_net_remove) | |
2315 | }; | |
2316 | ||
2317 | /** | |
2318 | * spider_net_init - init function when the driver is loaded | |
2319 | * | |
2320 | * spider_net_init registers the device driver | |
2321 | */ | |
2322 | static int __init spider_net_init(void) | |
2323 | { | |
2324 | if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { | |
2325 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; | |
2326 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2327 | } | |
2328 | if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { | |
2329 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; | |
2330 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2331 | } | |
2332 | if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { | |
2333 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; | |
2334 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2335 | } | |
2336 | if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { | |
2337 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; | |
2338 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2339 | } | |
2340 | ||
2341 | return pci_register_driver(&spider_net_driver); | |
2342 | } | |
2343 | ||
2344 | /** | |
2345 | * spider_net_cleanup - exit function when driver is unloaded | |
2346 | * | |
2347 | * spider_net_cleanup unregisters the device driver | |
2348 | */ | |
2349 | static void __exit spider_net_cleanup(void) | |
2350 | { | |
2351 | pci_unregister_driver(&spider_net_driver); | |
2352 | } | |
2353 | ||
2354 | module_init(spider_net_init); | |
2355 | module_exit(spider_net_cleanup); |