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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 | ||
aaec0fab JO |
24 | #include <linux/compiler.h> |
25 | #include <linux/crc32.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/etherdevice.h> | |
28 | #include <linux/ethtool.h> | |
29 | #include <linux/firmware.h> | |
30 | #include <linux/if_vlan.h> | |
7c5c220e | 31 | #include <linux/in.h> |
aaec0fab JO |
32 | #include <linux/init.h> |
33 | #include <linux/ioport.h> | |
34 | #include <linux/ip.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/mii.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/device.h> | |
40 | #include <linux/pci.h> | |
41 | #include <linux/skbuff.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/tcp.h> | |
44 | #include <linux/types.h> | |
11f1a52b | 45 | #include <linux/vmalloc.h> |
aaec0fab JO |
46 | #include <linux/wait.h> |
47 | #include <linux/workqueue.h> | |
48 | #include <asm/bitops.h> | |
49 | #include <asm/pci-bridge.h> | |
50 | #include <net/checksum.h> | |
51 | ||
52 | #include "spider_net.h" | |
53 | ||
54 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ | |
55 | "<Jens.Osterkamp@de.ibm.com>"); | |
56 | MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); | |
57 | MODULE_LICENSE("GPL"); | |
58 | ||
59 | static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; | |
60 | static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; | |
61 | ||
62 | module_param(rx_descriptors, int, 0644); | |
63 | module_param(tx_descriptors, int, 0644); | |
64 | ||
65 | MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ | |
66 | "in rx chains"); | |
67 | MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ | |
68 | "in tx chain"); | |
69 | ||
70 | char spider_net_driver_name[] = "spidernet"; | |
71 | ||
72 | static struct pci_device_id spider_net_pci_tbl[] = { | |
73 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, | |
74 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, | |
75 | { 0, } | |
76 | }; | |
77 | ||
78 | MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); | |
79 | ||
80 | /** | |
81 | * spider_net_read_reg - reads an SMMIO register of a card | |
82 | * @card: device structure | |
83 | * @reg: register to read from | |
84 | * | |
85 | * returns the content of the specified SMMIO register. | |
86 | */ | |
87 | static u32 | |
88 | spider_net_read_reg(struct spider_net_card *card, u32 reg) | |
89 | { | |
90 | u32 value; | |
91 | ||
92 | value = readl(card->regs + reg); | |
93 | value = le32_to_cpu(value); | |
94 | ||
95 | return value; | |
96 | } | |
97 | ||
98 | /** | |
99 | * spider_net_write_reg - writes to an SMMIO register of a card | |
100 | * @card: device structure | |
101 | * @reg: register to write to | |
102 | * @value: value to write into the specified SMMIO register | |
103 | */ | |
104 | static void | |
105 | spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) | |
106 | { | |
107 | value = cpu_to_le32(value); | |
108 | writel(value, card->regs + reg); | |
109 | } | |
110 | ||
aaec0fab JO |
111 | /** spider_net_write_phy - write to phy register |
112 | * @netdev: adapter to be written to | |
113 | * @mii_id: id of MII | |
114 | * @reg: PHY register | |
115 | * @val: value to be written to phy register | |
116 | * | |
117 | * spider_net_write_phy_register writes to an arbitrary PHY | |
118 | * register via the spider GPCWOPCMD register. We assume the queue does | |
119 | * not run full (not more than 15 commands outstanding). | |
120 | **/ | |
121 | static void | |
122 | spider_net_write_phy(struct net_device *netdev, int mii_id, | |
123 | int reg, int val) | |
124 | { | |
125 | struct spider_net_card *card = netdev_priv(netdev); | |
126 | u32 writevalue; | |
127 | ||
128 | writevalue = ((u32)mii_id << 21) | | |
129 | ((u32)reg << 16) | ((u32)val); | |
130 | ||
131 | spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); | |
132 | } | |
133 | ||
134 | /** spider_net_read_phy - read from phy register | |
135 | * @netdev: network device to be read from | |
136 | * @mii_id: id of MII | |
137 | * @reg: PHY register | |
138 | * | |
139 | * Returns value read from PHY register | |
140 | * | |
141 | * spider_net_write_phy reads from an arbitrary PHY | |
142 | * register via the spider GPCROPCMD register | |
143 | **/ | |
144 | static int | |
145 | spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) | |
146 | { | |
147 | struct spider_net_card *card = netdev_priv(netdev); | |
148 | u32 readvalue; | |
149 | ||
150 | readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); | |
151 | spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); | |
152 | ||
153 | /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT | |
154 | * interrupt, as we poll for the completion of the read operation | |
155 | * in spider_net_read_phy. Should take about 50 us */ | |
156 | do { | |
157 | readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); | |
158 | } while (readvalue & SPIDER_NET_GPREXEC); | |
159 | ||
160 | readvalue &= SPIDER_NET_GPRDAT_MASK; | |
161 | ||
162 | return readvalue; | |
163 | } | |
164 | ||
165 | /** | |
11f1a52b | 166 | * spider_net_rx_irq_off - switch off rx irq on this spider card |
aaec0fab JO |
167 | * @card: device structure |
168 | * | |
11f1a52b | 169 | * switches off rx irq by masking them out in the GHIINTnMSK register |
aaec0fab JO |
170 | */ |
171 | static void | |
11f1a52b | 172 | spider_net_rx_irq_off(struct spider_net_card *card) |
aaec0fab JO |
173 | { |
174 | u32 regvalue; | |
aaec0fab | 175 | |
11f1a52b AB |
176 | regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); |
177 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
178 | } |
179 | ||
180 | /** | |
11f1a52b | 181 | * spider_net_rx_irq_on - switch on rx irq on this spider card |
aaec0fab JO |
182 | * @card: device structure |
183 | * | |
11f1a52b | 184 | * switches on rx irq by enabling them in the GHIINTnMSK register |
aaec0fab JO |
185 | */ |
186 | static void | |
11f1a52b | 187 | spider_net_rx_irq_on(struct spider_net_card *card) |
aaec0fab JO |
188 | { |
189 | u32 regvalue; | |
aaec0fab | 190 | |
11f1a52b AB |
191 | regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; |
192 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
193 | } |
194 | ||
195 | /** | |
196 | * spider_net_set_promisc - sets the unicast address or the promiscuous mode | |
197 | * @card: card structure | |
198 | * | |
199 | * spider_net_set_promisc sets the unicast destination address filter and | |
200 | * thus either allows for non-promisc mode or promisc mode | |
201 | */ | |
202 | static void | |
203 | spider_net_set_promisc(struct spider_net_card *card) | |
204 | { | |
205 | u32 macu, macl; | |
206 | struct net_device *netdev = card->netdev; | |
207 | ||
208 | if (netdev->flags & IFF_PROMISC) { | |
209 | /* clear destination entry 0 */ | |
210 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); | |
211 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); | |
212 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
213 | SPIDER_NET_PROMISC_VALUE); | |
214 | } else { | |
215 | macu = netdev->dev_addr[0]; | |
216 | macu <<= 8; | |
217 | macu |= netdev->dev_addr[1]; | |
218 | memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); | |
219 | ||
220 | macu |= SPIDER_NET_UA_DESCR_VALUE; | |
221 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); | |
222 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); | |
223 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
224 | SPIDER_NET_NONPROMISC_VALUE); | |
225 | } | |
226 | } | |
227 | ||
228 | /** | |
229 | * spider_net_get_mac_address - read mac address from spider card | |
230 | * @card: device structure | |
231 | * | |
232 | * reads MAC address from GMACUNIMACU and GMACUNIMACL registers | |
233 | */ | |
234 | static int | |
235 | spider_net_get_mac_address(struct net_device *netdev) | |
236 | { | |
237 | struct spider_net_card *card = netdev_priv(netdev); | |
238 | u32 macl, macu; | |
239 | ||
240 | macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL); | |
241 | macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU); | |
242 | ||
243 | netdev->dev_addr[0] = (macu >> 24) & 0xff; | |
244 | netdev->dev_addr[1] = (macu >> 16) & 0xff; | |
245 | netdev->dev_addr[2] = (macu >> 8) & 0xff; | |
246 | netdev->dev_addr[3] = macu & 0xff; | |
247 | netdev->dev_addr[4] = (macl >> 8) & 0xff; | |
248 | netdev->dev_addr[5] = macl & 0xff; | |
249 | ||
250 | if (!is_valid_ether_addr(&netdev->dev_addr[0])) | |
251 | return -EINVAL; | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | /** | |
257 | * spider_net_get_descr_status -- returns the status of a descriptor | |
258 | * @descr: descriptor to look at | |
259 | * | |
260 | * returns the status as in the dmac_cmd_status field of the descriptor | |
261 | */ | |
262 | static enum spider_net_descr_status | |
263 | spider_net_get_descr_status(struct spider_net_descr *descr) | |
264 | { | |
265 | u32 cmd_status; | |
11f1a52b | 266 | |
aaec0fab | 267 | cmd_status = descr->dmac_cmd_status; |
aaec0fab JO |
268 | cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT; |
269 | /* no need to mask out any bits, as cmd_status is 32 bits wide only | |
270 | * (and unsigned) */ | |
271 | return cmd_status; | |
272 | } | |
273 | ||
274 | /** | |
275 | * spider_net_set_descr_status -- sets the status of a descriptor | |
276 | * @descr: descriptor to change | |
277 | * @status: status to set in the descriptor | |
278 | * | |
279 | * changes the status to the specified value. Doesn't change other bits | |
280 | * in the status | |
281 | */ | |
282 | static void | |
283 | spider_net_set_descr_status(struct spider_net_descr *descr, | |
284 | enum spider_net_descr_status status) | |
285 | { | |
286 | u32 cmd_status; | |
287 | /* read the status */ | |
aaec0fab JO |
288 | cmd_status = descr->dmac_cmd_status; |
289 | /* clean the upper 4 bits */ | |
290 | cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO; | |
291 | /* add the status to it */ | |
292 | cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT; | |
293 | /* and write it back */ | |
294 | descr->dmac_cmd_status = cmd_status; | |
aaec0fab JO |
295 | } |
296 | ||
297 | /** | |
298 | * spider_net_free_chain - free descriptor chain | |
299 | * @card: card structure | |
300 | * @chain: address of chain | |
301 | * | |
302 | */ | |
303 | static void | |
304 | spider_net_free_chain(struct spider_net_card *card, | |
305 | struct spider_net_descr_chain *chain) | |
306 | { | |
307 | struct spider_net_descr *descr; | |
308 | ||
309 | for (descr = chain->tail; !descr->bus_addr; descr = descr->next) { | |
310 | pci_unmap_single(card->pdev, descr->bus_addr, | |
311 | SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL); | |
312 | descr->bus_addr = 0; | |
313 | } | |
314 | } | |
315 | ||
316 | /** | |
317 | * spider_net_init_chain - links descriptor chain | |
318 | * @card: card structure | |
319 | * @chain: address of chain | |
320 | * @start_descr: address of descriptor array | |
321 | * @no: number of descriptors | |
322 | * | |
323 | * we manage a circular list that mirrors the hardware structure, | |
324 | * except that the hardware uses bus addresses. | |
325 | * | |
326 | * returns 0 on success, <0 on failure | |
327 | */ | |
328 | static int | |
329 | spider_net_init_chain(struct spider_net_card *card, | |
330 | struct spider_net_descr_chain *chain, | |
331 | struct spider_net_descr *start_descr, int no) | |
332 | { | |
333 | int i; | |
334 | struct spider_net_descr *descr; | |
11f1a52b | 335 | dma_addr_t buf; |
aaec0fab | 336 | |
11f1a52b | 337 | atomic_set(&card->rx_chain_refill,0); |
aaec0fab JO |
338 | |
339 | descr = start_descr; | |
340 | memset(descr, 0, sizeof(*descr) * no); | |
341 | ||
342 | /* set up the hardware pointers in each descriptor */ | |
343 | for (i=0; i<no; i++, descr++) { | |
344 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
345 | ||
11f1a52b AB |
346 | buf = pci_map_single(card->pdev, descr, |
347 | SPIDER_NET_DESCR_SIZE, | |
348 | PCI_DMA_BIDIRECTIONAL); | |
aaec0fab | 349 | |
11f1a52b | 350 | if (buf == DMA_ERROR_CODE) |
aaec0fab JO |
351 | goto iommu_error; |
352 | ||
11f1a52b | 353 | descr->bus_addr = buf; |
aaec0fab JO |
354 | descr->next = descr + 1; |
355 | descr->prev = descr - 1; | |
356 | ||
357 | } | |
358 | /* do actual circular list */ | |
359 | (descr-1)->next = start_descr; | |
360 | start_descr->prev = descr-1; | |
361 | ||
362 | descr = start_descr; | |
363 | for (i=0; i < no; i++, descr++) { | |
364 | descr->next_descr_addr = descr->next->bus_addr; | |
365 | } | |
366 | ||
367 | chain->head = start_descr; | |
368 | chain->tail = start_descr; | |
369 | ||
370 | return 0; | |
371 | ||
372 | iommu_error: | |
373 | descr = start_descr; | |
374 | for (i=0; i < no; i++, descr++) | |
375 | if (descr->bus_addr) | |
376 | pci_unmap_single(card->pdev, descr->bus_addr, | |
11f1a52b AB |
377 | SPIDER_NET_DESCR_SIZE, |
378 | PCI_DMA_BIDIRECTIONAL); | |
aaec0fab JO |
379 | return -ENOMEM; |
380 | } | |
381 | ||
382 | /** | |
383 | * spider_net_free_rx_chain_contents - frees descr contents in rx chain | |
384 | * @card: card structure | |
385 | * | |
386 | * returns 0 on success, <0 on failure | |
387 | */ | |
388 | static void | |
389 | spider_net_free_rx_chain_contents(struct spider_net_card *card) | |
390 | { | |
391 | struct spider_net_descr *descr; | |
392 | ||
393 | descr = card->rx_chain.head; | |
394 | while (descr->next != card->rx_chain.head) { | |
395 | if (descr->skb) { | |
396 | dev_kfree_skb(descr->skb); | |
397 | pci_unmap_single(card->pdev, descr->buf_addr, | |
11f1a52b | 398 | SPIDER_NET_MAX_FRAME, |
aaec0fab JO |
399 | PCI_DMA_BIDIRECTIONAL); |
400 | } | |
401 | descr = descr->next; | |
402 | } | |
403 | } | |
404 | ||
405 | /** | |
406 | * spider_net_prepare_rx_descr - reinitializes a rx descriptor | |
407 | * @card: card structure | |
408 | * @descr: descriptor to re-init | |
409 | * | |
410 | * return 0 on succes, <0 on failure | |
411 | * | |
412 | * allocates a new rx skb, iommu-maps it and attaches it to the descriptor. | |
413 | * Activate the descriptor state-wise | |
414 | */ | |
415 | static int | |
416 | spider_net_prepare_rx_descr(struct spider_net_card *card, | |
417 | struct spider_net_descr *descr) | |
418 | { | |
8e0a613b | 419 | dma_addr_t buf; |
aaec0fab JO |
420 | int error = 0; |
421 | int offset; | |
422 | int bufsize; | |
423 | ||
424 | /* we need to round up the buffer size to a multiple of 128 */ | |
11f1a52b | 425 | bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & |
aaec0fab JO |
426 | (~(SPIDER_NET_RXBUF_ALIGN - 1)); |
427 | ||
428 | /* and we need to have it 128 byte aligned, therefore we allocate a | |
429 | * bit more */ | |
430 | /* allocate an skb */ | |
431 | descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1); | |
432 | if (!descr->skb) { | |
11f1a52b AB |
433 | if (netif_msg_rx_err(card) && net_ratelimit()) |
434 | pr_err("Not enough memory to allocate rx buffer\n"); | |
aaec0fab JO |
435 | return -ENOMEM; |
436 | } | |
437 | descr->buf_size = bufsize; | |
438 | descr->result_size = 0; | |
439 | descr->valid_size = 0; | |
440 | descr->data_status = 0; | |
441 | descr->data_error = 0; | |
442 | ||
443 | offset = ((unsigned long)descr->skb->data) & | |
444 | (SPIDER_NET_RXBUF_ALIGN - 1); | |
445 | if (offset) | |
446 | skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); | |
447 | /* io-mmu-map the skb */ | |
8e0a613b | 448 | buf = pci_map_single(card->pdev, descr->skb->data, |
11f1a52b | 449 | SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL); |
8e0a613b AB |
450 | descr->buf_addr = buf; |
451 | if (buf == DMA_ERROR_CODE) { | |
aaec0fab | 452 | dev_kfree_skb_any(descr->skb); |
11f1a52b | 453 | if (netif_msg_rx_err(card) && net_ratelimit()) |
aaec0fab JO |
454 | pr_err("Could not iommu-map rx buffer\n"); |
455 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
456 | } else { | |
457 | descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED; | |
458 | } | |
459 | ||
460 | return error; | |
461 | } | |
462 | ||
463 | /** | |
11f1a52b | 464 | * spider_net_enable_rxchtails - sets RX dmac chain tail addresses |
aaec0fab JO |
465 | * @card: card structure |
466 | * | |
11f1a52b | 467 | * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the |
aaec0fab JO |
468 | * chip by writing to the appropriate register. DMA is enabled in |
469 | * spider_net_enable_rxdmac. | |
470 | */ | |
471 | static void | |
472 | spider_net_enable_rxchtails(struct spider_net_card *card) | |
473 | { | |
474 | /* assume chain is aligned correctly */ | |
475 | spider_net_write_reg(card, SPIDER_NET_GDADCHA , | |
476 | card->rx_chain.tail->bus_addr); | |
477 | } | |
478 | ||
479 | /** | |
480 | * spider_net_enable_rxdmac - enables a receive DMA controller | |
481 | * @card: card structure | |
482 | * | |
483 | * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN | |
484 | * in the GDADMACCNTR register | |
485 | */ | |
486 | static void | |
487 | spider_net_enable_rxdmac(struct spider_net_card *card) | |
488 | { | |
11f1a52b | 489 | wmb(); |
aaec0fab JO |
490 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, |
491 | SPIDER_NET_DMA_RX_VALUE); | |
492 | } | |
493 | ||
494 | /** | |
495 | * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains | |
496 | * @card: card structure | |
497 | * | |
11f1a52b | 498 | * refills descriptors in the rx chain: allocates skbs and iommu-maps them. |
aaec0fab JO |
499 | */ |
500 | static void | |
501 | spider_net_refill_rx_chain(struct spider_net_card *card) | |
502 | { | |
503 | struct spider_net_descr_chain *chain; | |
aaec0fab JO |
504 | |
505 | chain = &card->rx_chain; | |
506 | ||
11f1a52b AB |
507 | /* one context doing the refill (and a second context seeing that |
508 | * and omitting it) is ok. If called by NAPI, we'll be called again | |
509 | * as spider_net_decode_one_descr is called several times. If some | |
510 | * interrupt calls us, the NAPI is about to clean up anyway. */ | |
511 | if (atomic_inc_return(&card->rx_chain_refill) == 1) | |
512 | while (spider_net_get_descr_status(chain->head) == | |
513 | SPIDER_NET_DESCR_NOT_IN_USE) { | |
514 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
515 | break; | |
516 | chain->head = chain->head->next; | |
517 | } | |
aaec0fab | 518 | |
11f1a52b | 519 | atomic_dec(&card->rx_chain_refill); |
aaec0fab JO |
520 | } |
521 | ||
522 | /** | |
523 | * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains | |
524 | * @card: card structure | |
525 | * | |
526 | * returns 0 on success, <0 on failure | |
527 | */ | |
528 | static int | |
529 | spider_net_alloc_rx_skbs(struct spider_net_card *card) | |
530 | { | |
531 | int result; | |
532 | struct spider_net_descr_chain *chain; | |
533 | ||
534 | result = -ENOMEM; | |
535 | ||
536 | chain = &card->rx_chain; | |
537 | /* put at least one buffer into the chain. if this fails, | |
538 | * we've got a problem. if not, spider_net_refill_rx_chain | |
539 | * will do the rest at the end of this function */ | |
540 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
541 | goto error; | |
542 | else | |
543 | chain->head = chain->head->next; | |
544 | ||
545 | /* this will allocate the rest of the rx buffers; if not, it's | |
546 | * business as usual later on */ | |
547 | spider_net_refill_rx_chain(card); | |
11f1a52b | 548 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
549 | return 0; |
550 | ||
551 | error: | |
552 | spider_net_free_rx_chain_contents(card); | |
553 | return result; | |
554 | } | |
555 | ||
556 | /** | |
557 | * spider_net_release_tx_descr - processes a used tx descriptor | |
558 | * @card: card structure | |
559 | * @descr: descriptor to release | |
560 | * | |
561 | * releases a used tx descriptor (unmapping, freeing of skb) | |
562 | */ | |
563 | static void | |
564 | spider_net_release_tx_descr(struct spider_net_card *card, | |
565 | struct spider_net_descr *descr) | |
566 | { | |
567 | struct sk_buff *skb; | |
568 | ||
569 | /* unmap the skb */ | |
570 | skb = descr->skb; | |
571 | pci_unmap_single(card->pdev, descr->buf_addr, skb->len, | |
572 | PCI_DMA_BIDIRECTIONAL); | |
573 | ||
574 | dev_kfree_skb_any(skb); | |
575 | ||
576 | /* set status to not used */ | |
577 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
578 | } | |
579 | ||
580 | /** | |
581 | * spider_net_release_tx_chain - processes sent tx descriptors | |
582 | * @card: adapter structure | |
583 | * @brutal: if set, don't care about whether descriptor seems to be in use | |
584 | * | |
11f1a52b AB |
585 | * returns 0 if the tx ring is empty, otherwise 1. |
586 | * | |
587 | * spider_net_release_tx_chain releases the tx descriptors that spider has | |
588 | * finished with (if non-brutal) or simply release tx descriptors (if brutal). | |
589 | * If some other context is calling this function, we return 1 so that we're | |
590 | * scheduled again (if we were scheduled) and will not loose initiative. | |
aaec0fab | 591 | */ |
11f1a52b | 592 | static int |
aaec0fab JO |
593 | spider_net_release_tx_chain(struct spider_net_card *card, int brutal) |
594 | { | |
595 | struct spider_net_descr_chain *tx_chain = &card->tx_chain; | |
596 | enum spider_net_descr_status status; | |
597 | ||
11f1a52b AB |
598 | if (atomic_inc_return(&card->tx_chain_release) != 1) { |
599 | atomic_dec(&card->tx_chain_release); | |
600 | return 1; | |
601 | } | |
aaec0fab | 602 | |
aaec0fab JO |
603 | for (;;) { |
604 | status = spider_net_get_descr_status(tx_chain->tail); | |
605 | switch (status) { | |
606 | case SPIDER_NET_DESCR_CARDOWNED: | |
11f1a52b AB |
607 | if (!brutal) |
608 | goto out; | |
aaec0fab JO |
609 | /* fallthrough, if we release the descriptors |
610 | * brutally (then we don't care about | |
611 | * SPIDER_NET_DESCR_CARDOWNED) */ | |
612 | case SPIDER_NET_DESCR_RESPONSE_ERROR: | |
613 | case SPIDER_NET_DESCR_PROTECTION_ERROR: | |
614 | case SPIDER_NET_DESCR_FORCE_END: | |
615 | if (netif_msg_tx_err(card)) | |
616 | pr_err("%s: forcing end of tx descriptor " | |
617 | "with status x%02x\n", | |
618 | card->netdev->name, status); | |
619 | card->netdev_stats.tx_dropped++; | |
620 | break; | |
621 | ||
622 | case SPIDER_NET_DESCR_COMPLETE: | |
623 | card->netdev_stats.tx_packets++; | |
624 | card->netdev_stats.tx_bytes += | |
625 | tx_chain->tail->skb->len; | |
626 | break; | |
627 | ||
628 | default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */ | |
629 | goto out; | |
630 | } | |
631 | spider_net_release_tx_descr(card, tx_chain->tail); | |
632 | tx_chain->tail = tx_chain->tail->next; | |
633 | } | |
634 | out: | |
11f1a52b AB |
635 | atomic_dec(&card->tx_chain_release); |
636 | ||
aaec0fab JO |
637 | netif_wake_queue(card->netdev); |
638 | ||
11f1a52b AB |
639 | if (status == SPIDER_NET_DESCR_CARDOWNED) |
640 | return 1; | |
641 | return 0; | |
642 | } | |
aaec0fab | 643 | |
11f1a52b AB |
644 | /** |
645 | * spider_net_cleanup_tx_ring - cleans up the TX ring | |
646 | * @card: card structure | |
647 | * | |
648 | * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use | |
649 | * interrupts to cleanup our TX ring) and returns sent packets to the stack | |
650 | * by freeing them | |
651 | */ | |
652 | static void | |
653 | spider_net_cleanup_tx_ring(struct spider_net_card *card) | |
654 | { | |
655 | if ( (spider_net_release_tx_chain(card, 0)) && | |
656 | (card->netdev->flags & IFF_UP) ) { | |
657 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); | |
658 | } | |
aaec0fab JO |
659 | } |
660 | ||
661 | /** | |
662 | * spider_net_get_multicast_hash - generates hash for multicast filter table | |
663 | * @addr: multicast address | |
664 | * | |
665 | * returns the hash value. | |
666 | * | |
667 | * spider_net_get_multicast_hash calculates a hash value for a given multicast | |
668 | * address, that is used to set the multicast filter tables | |
669 | */ | |
670 | static u8 | |
671 | spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) | |
672 | { | |
aaec0fab JO |
673 | u32 crc; |
674 | u8 hash; | |
11f1a52b AB |
675 | char addr_for_crc[ETH_ALEN] = { 0, }; |
676 | int i, bit; | |
677 | ||
678 | for (i = 0; i < ETH_ALEN * 8; i++) { | |
679 | bit = (addr[i / 8] >> (i % 8)) & 1; | |
680 | addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); | |
681 | } | |
aaec0fab | 682 | |
11f1a52b | 683 | crc = crc32_be(~0, addr_for_crc, netdev->addr_len); |
aaec0fab JO |
684 | |
685 | hash = (crc >> 27); | |
686 | hash <<= 3; | |
687 | hash |= crc & 7; | |
11f1a52b | 688 | hash &= 0xff; |
aaec0fab JO |
689 | |
690 | return hash; | |
691 | } | |
692 | ||
693 | /** | |
694 | * spider_net_set_multi - sets multicast addresses and promisc flags | |
695 | * @netdev: interface device structure | |
696 | * | |
697 | * spider_net_set_multi configures multicast addresses as needed for the | |
698 | * netdev interface. It also sets up multicast, allmulti and promisc | |
699 | * flags appropriately | |
700 | */ | |
701 | static void | |
702 | spider_net_set_multi(struct net_device *netdev) | |
703 | { | |
704 | struct dev_mc_list *mc; | |
705 | u8 hash; | |
706 | int i; | |
707 | u32 reg; | |
708 | struct spider_net_card *card = netdev_priv(netdev); | |
709 | unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = | |
710 | {0, }; | |
711 | ||
712 | spider_net_set_promisc(card); | |
713 | ||
714 | if (netdev->flags & IFF_ALLMULTI) { | |
715 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { | |
716 | set_bit(i, bitmask); | |
717 | } | |
718 | goto write_hash; | |
719 | } | |
720 | ||
721 | /* well, we know, what the broadcast hash value is: it's xfd | |
722 | hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ | |
723 | set_bit(0xfd, bitmask); | |
724 | ||
725 | for (mc = netdev->mc_list; mc; mc = mc->next) { | |
726 | hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr); | |
727 | set_bit(hash, bitmask); | |
728 | } | |
729 | ||
730 | write_hash: | |
731 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { | |
732 | reg = 0; | |
733 | if (test_bit(i * 4, bitmask)) | |
734 | reg += 0x08; | |
735 | reg <<= 8; | |
736 | if (test_bit(i * 4 + 1, bitmask)) | |
737 | reg += 0x08; | |
738 | reg <<= 8; | |
739 | if (test_bit(i * 4 + 2, bitmask)) | |
740 | reg += 0x08; | |
741 | reg <<= 8; | |
742 | if (test_bit(i * 4 + 3, bitmask)) | |
743 | reg += 0x08; | |
744 | ||
745 | spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); | |
746 | } | |
747 | } | |
748 | ||
749 | /** | |
750 | * spider_net_disable_rxdmac - disables the receive DMA controller | |
751 | * @card: card structure | |
752 | * | |
753 | * spider_net_disable_rxdmac terminates processing on the DMA controller by | |
754 | * turing off DMA and issueing a force end | |
755 | */ | |
756 | static void | |
757 | spider_net_disable_rxdmac(struct spider_net_card *card) | |
758 | { | |
759 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
760 | SPIDER_NET_DMA_RX_FEND_VALUE); | |
761 | } | |
762 | ||
763 | /** | |
764 | * spider_net_stop - called upon ifconfig down | |
765 | * @netdev: interface device structure | |
766 | * | |
767 | * always returns 0 | |
768 | */ | |
769 | int | |
770 | spider_net_stop(struct net_device *netdev) | |
771 | { | |
772 | struct spider_net_card *card = netdev_priv(netdev); | |
773 | ||
11f1a52b | 774 | tasklet_kill(&card->rxram_full_tl); |
aaec0fab JO |
775 | netif_poll_disable(netdev); |
776 | netif_carrier_off(netdev); | |
777 | netif_stop_queue(netdev); | |
11f1a52b | 778 | del_timer_sync(&card->tx_timer); |
aaec0fab JO |
779 | |
780 | /* disable/mask all interrupts */ | |
781 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); | |
782 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); | |
783 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); | |
784 | ||
543cec51 JO |
785 | /* free_irq(netdev->irq, netdev);*/ |
786 | free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev); | |
787 | ||
aaec0fab JO |
788 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
789 | SPIDER_NET_DMA_TX_FEND_VALUE); | |
790 | ||
791 | /* turn off DMA, force end */ | |
792 | spider_net_disable_rxdmac(card); | |
793 | ||
794 | /* release chains */ | |
795 | spider_net_release_tx_chain(card, 1); | |
796 | ||
aaec0fab JO |
797 | spider_net_free_chain(card, &card->tx_chain); |
798 | spider_net_free_chain(card, &card->rx_chain); | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | /** | |
804 | * spider_net_get_next_tx_descr - returns the next available tx descriptor | |
805 | * @card: device structure to get descriptor from | |
806 | * | |
807 | * returns the address of the next descriptor, or NULL if not available. | |
808 | */ | |
809 | static struct spider_net_descr * | |
810 | spider_net_get_next_tx_descr(struct spider_net_card *card) | |
811 | { | |
812 | /* check, if head points to not-in-use descr */ | |
813 | if ( spider_net_get_descr_status(card->tx_chain.head) == | |
814 | SPIDER_NET_DESCR_NOT_IN_USE ) { | |
815 | return card->tx_chain.head; | |
816 | } else { | |
817 | return NULL; | |
818 | } | |
819 | } | |
820 | ||
821 | /** | |
822 | * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field | |
823 | * @descr: descriptor structure to fill out | |
824 | * @skb: packet to consider | |
825 | * | |
826 | * fills out the command and status field of the descriptor structure, | |
11f1a52b | 827 | * depending on hardware checksum settings. |
aaec0fab JO |
828 | */ |
829 | static void | |
830 | spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr, | |
831 | struct sk_buff *skb) | |
832 | { | |
11f1a52b AB |
833 | /* make sure the other fields in the descriptor are written */ |
834 | wmb(); | |
835 | ||
aaec0fab JO |
836 | if (skb->ip_summed != CHECKSUM_HW) { |
837 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS; | |
838 | return; | |
839 | } | |
840 | ||
841 | /* is packet ip? | |
842 | * if yes: tcp? udp? */ | |
843 | if (skb->protocol == htons(ETH_P_IP)) { | |
11f1a52b | 844 | if (skb->nh.iph->protocol == IPPROTO_TCP) |
aaec0fab | 845 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS; |
11f1a52b | 846 | else if (skb->nh.iph->protocol == IPPROTO_UDP) |
aaec0fab | 847 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS; |
11f1a52b AB |
848 | else /* the stack should checksum non-tcp and non-udp |
849 | packets on his own: NETIF_F_IP_CSUM */ | |
aaec0fab | 850 | descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS; |
aaec0fab JO |
851 | } |
852 | } | |
853 | ||
854 | /** | |
855 | * spider_net_prepare_tx_descr - fill tx descriptor with skb data | |
856 | * @card: card structure | |
857 | * @descr: descriptor structure to fill out | |
858 | * @skb: packet to use | |
859 | * | |
860 | * returns 0 on success, <0 on failure. | |
861 | * | |
862 | * fills out the descriptor structure with skb data and len. Copies data, | |
863 | * if needed (32bit DMA!) | |
864 | */ | |
865 | static int | |
866 | spider_net_prepare_tx_descr(struct spider_net_card *card, | |
867 | struct spider_net_descr *descr, | |
868 | struct sk_buff *skb) | |
869 | { | |
11f1a52b AB |
870 | dma_addr_t buf; |
871 | ||
872 | buf = pci_map_single(card->pdev, skb->data, | |
873 | skb->len, PCI_DMA_BIDIRECTIONAL); | |
8e0a613b | 874 | if (buf == DMA_ERROR_CODE) { |
11f1a52b | 875 | if (netif_msg_tx_err(card) && net_ratelimit()) |
aaec0fab JO |
876 | pr_err("could not iommu-map packet (%p, %i). " |
877 | "Dropping packet\n", skb->data, skb->len); | |
878 | return -ENOMEM; | |
879 | } | |
880 | ||
8e0a613b | 881 | descr->buf_addr = buf; |
aaec0fab JO |
882 | descr->buf_size = skb->len; |
883 | descr->skb = skb; | |
884 | descr->data_status = 0; | |
885 | ||
aaec0fab JO |
886 | spider_net_set_txdescr_cmdstat(descr,skb); |
887 | ||
888 | return 0; | |
889 | } | |
890 | ||
891 | /** | |
892 | * spider_net_kick_tx_dma - enables TX DMA processing | |
893 | * @card: card structure | |
894 | * @descr: descriptor address to enable TX processing at | |
895 | * | |
896 | * spider_net_kick_tx_dma writes the current tx chain head as start address | |
897 | * of the tx descriptor chain and enables the transmission DMA engine | |
898 | */ | |
899 | static void | |
900 | spider_net_kick_tx_dma(struct spider_net_card *card, | |
901 | struct spider_net_descr *descr) | |
902 | { | |
903 | /* this is the only descriptor in the output chain. | |
904 | * Enable TX DMA */ | |
905 | ||
906 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
907 | descr->bus_addr); | |
908 | ||
909 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
910 | SPIDER_NET_DMA_TX_VALUE); | |
911 | } | |
912 | ||
913 | /** | |
914 | * spider_net_xmit - transmits a frame over the device | |
915 | * @skb: packet to send out | |
916 | * @netdev: interface device structure | |
917 | * | |
918 | * returns 0 on success, <0 on failure | |
919 | */ | |
920 | static int | |
921 | spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) | |
922 | { | |
923 | struct spider_net_card *card = netdev_priv(netdev); | |
924 | struct spider_net_descr *descr; | |
925 | int result; | |
926 | ||
11f1a52b | 927 | spider_net_release_tx_chain(card, 0); |
aaec0fab | 928 | |
11f1a52b | 929 | descr = spider_net_get_next_tx_descr(card); |
aaec0fab | 930 | |
11f1a52b AB |
931 | if (!descr) |
932 | goto error; | |
aaec0fab JO |
933 | |
934 | result = spider_net_prepare_tx_descr(card, descr, skb); | |
935 | if (result) | |
936 | goto error; | |
937 | ||
938 | card->tx_chain.head = card->tx_chain.head->next; | |
939 | ||
aaec0fab | 940 | if (spider_net_get_descr_status(descr->prev) != |
11f1a52b AB |
941 | SPIDER_NET_DESCR_CARDOWNED) { |
942 | /* make sure the current descriptor is in memory. Then | |
943 | * kicking it on again makes sense, if the previous is not | |
944 | * card-owned anymore. Check the previous descriptor twice | |
945 | * to omit an mb() in heavy traffic cases */ | |
946 | mb(); | |
947 | if (spider_net_get_descr_status(descr->prev) != | |
948 | SPIDER_NET_DESCR_CARDOWNED) | |
949 | spider_net_kick_tx_dma(card, descr); | |
950 | } | |
951 | ||
952 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); | |
aaec0fab JO |
953 | |
954 | return NETDEV_TX_OK; | |
955 | ||
956 | error: | |
957 | card->netdev_stats.tx_dropped++; | |
11f1a52b | 958 | return NETDEV_TX_BUSY; |
aaec0fab JO |
959 | } |
960 | ||
961 | /** | |
962 | * spider_net_do_ioctl - called for device ioctls | |
963 | * @netdev: interface device structure | |
964 | * @ifr: request parameter structure for ioctl | |
965 | * @cmd: command code for ioctl | |
966 | * | |
967 | * returns 0 on success, <0 on failure. Currently, we have no special ioctls. | |
968 | * -EOPNOTSUPP is returned, if an unknown ioctl was requested | |
969 | */ | |
970 | static int | |
971 | spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
972 | { | |
973 | switch (cmd) { | |
974 | default: | |
975 | return -EOPNOTSUPP; | |
976 | } | |
977 | } | |
978 | ||
979 | /** | |
980 | * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on | |
981 | * @descr: descriptor to process | |
982 | * @card: card structure | |
11f1a52b | 983 | * @napi: whether caller is in NAPI context |
aaec0fab JO |
984 | * |
985 | * returns 1 on success, 0 if no packet was passed to the stack | |
986 | * | |
987 | * iommu-unmaps the skb, fills out skb structure and passes the data to the | |
988 | * stack. The descriptor state is not changed. | |
989 | */ | |
990 | static int | |
991 | spider_net_pass_skb_up(struct spider_net_descr *descr, | |
11f1a52b | 992 | struct spider_net_card *card, int napi) |
aaec0fab JO |
993 | { |
994 | struct sk_buff *skb; | |
995 | struct net_device *netdev; | |
996 | u32 data_status, data_error; | |
997 | ||
998 | data_status = descr->data_status; | |
999 | data_error = descr->data_error; | |
1000 | ||
1001 | netdev = card->netdev; | |
1002 | ||
11f1a52b AB |
1003 | /* unmap descriptor */ |
1004 | pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME, | |
aaec0fab JO |
1005 | PCI_DMA_BIDIRECTIONAL); |
1006 | ||
1007 | /* the cases we'll throw away the packet immediately */ | |
11f1a52b AB |
1008 | if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) { |
1009 | if (netif_msg_rx_err(card)) | |
1010 | pr_err("error in received descriptor found, " | |
1011 | "data_status=x%08x, data_error=x%08x\n", | |
1012 | data_status, data_error); | |
aaec0fab | 1013 | return 0; |
11f1a52b | 1014 | } |
aaec0fab | 1015 | |
11f1a52b | 1016 | skb = descr->skb; |
aaec0fab JO |
1017 | skb->dev = netdev; |
1018 | skb_put(skb, descr->valid_size); | |
1019 | ||
1020 | /* the card seems to add 2 bytes of junk in front | |
1021 | * of the ethernet frame */ | |
1022 | #define SPIDER_MISALIGN 2 | |
1023 | skb_pull(skb, SPIDER_MISALIGN); | |
1024 | skb->protocol = eth_type_trans(skb, netdev); | |
1025 | ||
1026 | /* checksum offload */ | |
1027 | if (card->options.rx_csum) { | |
11f1a52b AB |
1028 | if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == |
1029 | SPIDER_NET_DATA_STATUS_CKSUM_MASK) && | |
1030 | !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) | |
aaec0fab JO |
1031 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1032 | else | |
1033 | skb->ip_summed = CHECKSUM_NONE; | |
11f1a52b | 1034 | } else |
aaec0fab | 1035 | skb->ip_summed = CHECKSUM_NONE; |
aaec0fab JO |
1036 | |
1037 | if (data_status & SPIDER_NET_VLAN_PACKET) { | |
1038 | /* further enhancements: HW-accel VLAN | |
1039 | * vlan_hwaccel_receive_skb | |
1040 | */ | |
1041 | } | |
1042 | ||
1043 | /* pass skb up to stack */ | |
11f1a52b AB |
1044 | if (napi) |
1045 | netif_receive_skb(skb); | |
1046 | else | |
1047 | netif_rx_ni(skb); | |
aaec0fab JO |
1048 | |
1049 | /* update netdevice statistics */ | |
1050 | card->netdev_stats.rx_packets++; | |
1051 | card->netdev_stats.rx_bytes += skb->len; | |
1052 | ||
1053 | return 1; | |
1054 | } | |
1055 | ||
1056 | /** | |
11f1a52b | 1057 | * spider_net_decode_one_descr - processes an rx descriptor |
aaec0fab | 1058 | * @card: card structure |
11f1a52b | 1059 | * @napi: whether caller is in NAPI context |
aaec0fab JO |
1060 | * |
1061 | * returns 1 if a packet has been sent to the stack, otherwise 0 | |
1062 | * | |
1063 | * processes an rx descriptor by iommu-unmapping the data buffer and passing | |
11f1a52b AB |
1064 | * the packet up to the stack. This function is called in softirq |
1065 | * context, e.g. either bottom half from interrupt or NAPI polling context | |
aaec0fab JO |
1066 | */ |
1067 | static int | |
11f1a52b | 1068 | spider_net_decode_one_descr(struct spider_net_card *card, int napi) |
aaec0fab JO |
1069 | { |
1070 | enum spider_net_descr_status status; | |
1071 | struct spider_net_descr *descr; | |
1072 | struct spider_net_descr_chain *chain; | |
1073 | int result; | |
1074 | ||
1075 | chain = &card->rx_chain; | |
1076 | descr = chain->tail; | |
1077 | ||
1078 | status = spider_net_get_descr_status(descr); | |
1079 | ||
1080 | if (status == SPIDER_NET_DESCR_CARDOWNED) { | |
1081 | /* nothing in the descriptor yet */ | |
11f1a52b AB |
1082 | result=0; |
1083 | goto out; | |
aaec0fab JO |
1084 | } |
1085 | ||
1086 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) { | |
11f1a52b | 1087 | /* not initialized yet, the ring must be empty */ |
aaec0fab | 1088 | spider_net_refill_rx_chain(card); |
11f1a52b AB |
1089 | spider_net_enable_rxdmac(card); |
1090 | result=0; | |
1091 | goto out; | |
aaec0fab JO |
1092 | } |
1093 | ||
11f1a52b | 1094 | /* descriptor definitively used -- move on tail */ |
aaec0fab JO |
1095 | chain->tail = descr->next; |
1096 | ||
1097 | result = 0; | |
1098 | if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || | |
1099 | (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || | |
1100 | (status == SPIDER_NET_DESCR_FORCE_END) ) { | |
1101 | if (netif_msg_rx_err(card)) | |
1102 | pr_err("%s: dropping RX descriptor with state %d\n", | |
1103 | card->netdev->name, status); | |
1104 | card->netdev_stats.rx_dropped++; | |
11f1a52b AB |
1105 | pci_unmap_single(card->pdev, descr->buf_addr, |
1106 | SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL); | |
1107 | dev_kfree_skb_irq(descr->skb); | |
aaec0fab JO |
1108 | goto refill; |
1109 | } | |
1110 | ||
1111 | if ( (status != SPIDER_NET_DESCR_COMPLETE) && | |
1112 | (status != SPIDER_NET_DESCR_FRAME_END) ) { | |
1113 | if (netif_msg_rx_err(card)) | |
1114 | pr_err("%s: RX descriptor with state %d\n", | |
1115 | card->netdev->name, status); | |
1116 | goto refill; | |
1117 | } | |
1118 | ||
1119 | /* ok, we've got a packet in descr */ | |
11f1a52b | 1120 | result = spider_net_pass_skb_up(descr, card, napi); |
aaec0fab JO |
1121 | refill: |
1122 | spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); | |
1123 | /* change the descriptor state: */ | |
11f1a52b AB |
1124 | if (!napi) |
1125 | spider_net_refill_rx_chain(card); | |
1126 | out: | |
aaec0fab JO |
1127 | return result; |
1128 | } | |
1129 | ||
1130 | /** | |
1131 | * spider_net_poll - NAPI poll function called by the stack to return packets | |
1132 | * @netdev: interface device structure | |
1133 | * @budget: number of packets we can pass to the stack at most | |
1134 | * | |
1135 | * returns 0 if no more packets available to the driver/stack. Returns 1, | |
1136 | * if the quota is exceeded, but the driver has still packets. | |
1137 | * | |
1138 | * spider_net_poll returns all packets from the rx descriptors to the stack | |
1139 | * (using netif_receive_skb). If all/enough packets are up, the driver | |
1140 | * reenables interrupts and returns 0. If not, 1 is returned. | |
1141 | */ | |
1142 | static int | |
1143 | spider_net_poll(struct net_device *netdev, int *budget) | |
1144 | { | |
1145 | struct spider_net_card *card = netdev_priv(netdev); | |
1146 | int packets_to_do, packets_done = 0; | |
1147 | int no_more_packets = 0; | |
1148 | ||
1149 | packets_to_do = min(*budget, netdev->quota); | |
1150 | ||
1151 | while (packets_to_do) { | |
11f1a52b | 1152 | if (spider_net_decode_one_descr(card, 1)) { |
aaec0fab JO |
1153 | packets_done++; |
1154 | packets_to_do--; | |
1155 | } else { | |
1156 | /* no more packets for the stack */ | |
1157 | no_more_packets = 1; | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | netdev->quota -= packets_done; | |
1163 | *budget -= packets_done; | |
11f1a52b | 1164 | spider_net_refill_rx_chain(card); |
aaec0fab JO |
1165 | |
1166 | /* if all packets are in the stack, enable interrupts and return 0 */ | |
1167 | /* if not, return 1 */ | |
1168 | if (no_more_packets) { | |
1169 | netif_rx_complete(netdev); | |
1170 | spider_net_rx_irq_on(card); | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | return 1; | |
1175 | } | |
1176 | ||
1177 | /** | |
1178 | * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card | |
1179 | * @netdev: interface device structure | |
1180 | * @grp: vlan_group structure that is registered (NULL on destroying interface) | |
1181 | */ | |
1182 | static void | |
1183 | spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp) | |
1184 | { | |
1185 | /* further enhancement... yet to do */ | |
1186 | return; | |
1187 | } | |
1188 | ||
1189 | /** | |
1190 | * spider_net_vlan_rx_add - adds VLAN id to the card filter | |
1191 | * @netdev: interface device structure | |
1192 | * @vid: VLAN id to add | |
1193 | */ | |
1194 | static void | |
1195 | spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid) | |
1196 | { | |
1197 | /* further enhancement... yet to do */ | |
1198 | /* add vid to card's VLAN filter table */ | |
1199 | return; | |
1200 | } | |
1201 | ||
1202 | /** | |
1203 | * spider_net_vlan_rx_kill - removes VLAN id to the card filter | |
1204 | * @netdev: interface device structure | |
1205 | * @vid: VLAN id to remove | |
1206 | */ | |
1207 | static void | |
1208 | spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid) | |
1209 | { | |
1210 | /* further enhancement... yet to do */ | |
1211 | /* remove vid from card's VLAN filter table */ | |
1212 | } | |
1213 | ||
1214 | /** | |
1215 | * spider_net_get_stats - get interface statistics | |
1216 | * @netdev: interface device structure | |
1217 | * | |
1218 | * returns the interface statistics residing in the spider_net_card struct | |
1219 | */ | |
1220 | static struct net_device_stats * | |
1221 | spider_net_get_stats(struct net_device *netdev) | |
1222 | { | |
1223 | struct spider_net_card *card = netdev_priv(netdev); | |
1224 | struct net_device_stats *stats = &card->netdev_stats; | |
1225 | return stats; | |
1226 | } | |
1227 | ||
1228 | /** | |
1229 | * spider_net_change_mtu - changes the MTU of an interface | |
1230 | * @netdev: interface device structure | |
1231 | * @new_mtu: new MTU value | |
1232 | * | |
1233 | * returns 0 on success, <0 on failure | |
1234 | */ | |
1235 | static int | |
1236 | spider_net_change_mtu(struct net_device *netdev, int new_mtu) | |
1237 | { | |
1238 | /* no need to re-alloc skbs or so -- the max mtu is about 2.3k | |
1239 | * and mtu is outbound only anyway */ | |
1240 | if ( (new_mtu < SPIDER_NET_MIN_MTU ) || | |
1241 | (new_mtu > SPIDER_NET_MAX_MTU) ) | |
1242 | return -EINVAL; | |
1243 | netdev->mtu = new_mtu; | |
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | /** | |
1248 | * spider_net_set_mac - sets the MAC of an interface | |
1249 | * @netdev: interface device structure | |
1250 | * @ptr: pointer to new MAC address | |
1251 | * | |
1252 | * Returns 0 on success, <0 on failure. Currently, we don't support this | |
1253 | * and will always return EOPNOTSUPP. | |
1254 | */ | |
1255 | static int | |
1256 | spider_net_set_mac(struct net_device *netdev, void *p) | |
1257 | { | |
1258 | struct spider_net_card *card = netdev_priv(netdev); | |
054034db | 1259 | u32 macl, macu, regvalue; |
aaec0fab JO |
1260 | struct sockaddr *addr = p; |
1261 | ||
aaec0fab JO |
1262 | if (!is_valid_ether_addr(addr->sa_data)) |
1263 | return -EADDRNOTAVAIL; | |
1264 | ||
054034db JO |
1265 | /* switch off GMACTPE and GMACRPE */ |
1266 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1267 | regvalue &= ~((1 << 5) | (1 << 6)); | |
1268 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1269 | ||
1270 | /* write mac */ | |
aaec0fab JO |
1271 | macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) + |
1272 | (addr->sa_data[2]<<8) + (addr->sa_data[3]); | |
1273 | macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]); | |
1274 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); | |
1275 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); | |
1276 | ||
054034db JO |
1277 | /* switch GMACTPE and GMACRPE back on */ |
1278 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1279 | regvalue |= ((1 << 5) | (1 << 6)); | |
1280 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1281 | ||
aaec0fab JO |
1282 | spider_net_set_promisc(card); |
1283 | ||
1284 | /* look up, whether we have been successful */ | |
1285 | if (spider_net_get_mac_address(netdev)) | |
1286 | return -EADDRNOTAVAIL; | |
1287 | if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len)) | |
1288 | return -EADDRNOTAVAIL; | |
1289 | ||
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | /** | |
1294 | * spider_net_enable_txdmac - enables a TX DMA controller | |
1295 | * @card: card structure | |
1296 | * | |
1297 | * spider_net_enable_txdmac enables the TX DMA controller by setting the | |
1298 | * descriptor chain tail address | |
1299 | */ | |
1300 | static void | |
1301 | spider_net_enable_txdmac(struct spider_net_card *card) | |
1302 | { | |
1303 | /* assume chain is aligned correctly */ | |
1304 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
1305 | card->tx_chain.tail->bus_addr); | |
1306 | } | |
1307 | ||
11f1a52b AB |
1308 | /** |
1309 | * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt | |
1310 | * @card: card structure | |
1311 | * | |
1312 | * spider_net_handle_rxram_full empties the RX ring so that spider can put | |
1313 | * more packets in it and empty its RX RAM. This is called in bottom half | |
1314 | * context | |
1315 | */ | |
1316 | static void | |
1317 | spider_net_handle_rxram_full(struct spider_net_card *card) | |
1318 | { | |
1319 | while (spider_net_decode_one_descr(card, 0)) | |
1320 | ; | |
1321 | spider_net_enable_rxchtails(card); | |
1322 | spider_net_enable_rxdmac(card); | |
1323 | netif_rx_schedule(card->netdev); | |
1324 | } | |
1325 | ||
aaec0fab JO |
1326 | /** |
1327 | * spider_net_handle_error_irq - handles errors raised by an interrupt | |
1328 | * @card: card structure | |
1329 | * @status_reg: interrupt status register 0 (GHIINT0STS) | |
1330 | * | |
1331 | * spider_net_handle_error_irq treats or ignores all error conditions | |
1332 | * found when an interrupt is presented | |
1333 | */ | |
1334 | static void | |
1335 | spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg) | |
1336 | { | |
1337 | u32 error_reg1, error_reg2; | |
1338 | u32 i; | |
1339 | int show_error = 1; | |
1340 | ||
1341 | error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); | |
1342 | error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); | |
1343 | ||
1344 | /* check GHIINT0STS ************************************/ | |
1345 | if (status_reg) | |
1346 | for (i = 0; i < 32; i++) | |
1347 | if (status_reg & (1<<i)) | |
1348 | switch (i) | |
1349 | { | |
1350 | /* let error_reg1 and error_reg2 evaluation decide, what to do | |
1351 | case SPIDER_NET_PHYINT: | |
1352 | case SPIDER_NET_GMAC2INT: | |
1353 | case SPIDER_NET_GMAC1INT: | |
1354 | case SPIDER_NET_GIPSINT: | |
1355 | case SPIDER_NET_GFIFOINT: | |
1356 | case SPIDER_NET_DMACINT: | |
1357 | case SPIDER_NET_GSYSINT: | |
1358 | break; */ | |
1359 | ||
1360 | case SPIDER_NET_GPWOPCMPINT: | |
1361 | /* PHY write operation completed */ | |
1362 | show_error = 0; | |
1363 | break; | |
1364 | case SPIDER_NET_GPROPCMPINT: | |
1365 | /* PHY read operation completed */ | |
1366 | /* we don't use semaphores, as we poll for the completion | |
1367 | * of the read operation in spider_net_read_phy. Should take | |
1368 | * about 50 us */ | |
1369 | show_error = 0; | |
1370 | break; | |
1371 | case SPIDER_NET_GPWFFINT: | |
1372 | /* PHY command queue full */ | |
1373 | if (netif_msg_intr(card)) | |
1374 | pr_err("PHY write queue full\n"); | |
1375 | show_error = 0; | |
1376 | break; | |
1377 | ||
1378 | /* case SPIDER_NET_GRMDADRINT: not used. print a message */ | |
1379 | /* case SPIDER_NET_GRMARPINT: not used. print a message */ | |
1380 | /* case SPIDER_NET_GRMMPINT: not used. print a message */ | |
1381 | ||
1382 | case SPIDER_NET_GDTDEN0INT: | |
1383 | /* someone has set TX_DMA_EN to 0 */ | |
1384 | show_error = 0; | |
1385 | break; | |
1386 | ||
1387 | case SPIDER_NET_GDDDEN0INT: /* fallthrough */ | |
1388 | case SPIDER_NET_GDCDEN0INT: /* fallthrough */ | |
1389 | case SPIDER_NET_GDBDEN0INT: /* fallthrough */ | |
1390 | case SPIDER_NET_GDADEN0INT: | |
1391 | /* someone has set RX_DMA_EN to 0 */ | |
1392 | show_error = 0; | |
1393 | break; | |
1394 | ||
1395 | /* RX interrupts */ | |
1396 | case SPIDER_NET_GDDFDCINT: | |
1397 | case SPIDER_NET_GDCFDCINT: | |
1398 | case SPIDER_NET_GDBFDCINT: | |
1399 | case SPIDER_NET_GDAFDCINT: | |
1400 | /* case SPIDER_NET_GDNMINT: not used. print a message */ | |
1401 | /* case SPIDER_NET_GCNMINT: not used. print a message */ | |
1402 | /* case SPIDER_NET_GBNMINT: not used. print a message */ | |
1403 | /* case SPIDER_NET_GANMINT: not used. print a message */ | |
1404 | /* case SPIDER_NET_GRFNMINT: not used. print a message */ | |
1405 | show_error = 0; | |
1406 | break; | |
1407 | ||
1408 | /* TX interrupts */ | |
1409 | case SPIDER_NET_GDTFDCINT: | |
1410 | show_error = 0; | |
1411 | break; | |
1412 | case SPIDER_NET_GTTEDINT: | |
1413 | show_error = 0; | |
1414 | break; | |
1415 | case SPIDER_NET_GDTDCEINT: | |
1416 | /* chain end. If a descriptor should be sent, kick off | |
1417 | * tx dma | |
1418 | if (card->tx_chain.tail == card->tx_chain.head) | |
1419 | spider_net_kick_tx_dma(card); | |
1420 | show_error = 0; */ | |
1421 | break; | |
1422 | ||
1423 | /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ | |
1424 | /* case SPIDER_NET_GFREECNTINT: not used. print a message */ | |
1425 | } | |
1426 | ||
1427 | /* check GHIINT1STS ************************************/ | |
1428 | if (error_reg1) | |
1429 | for (i = 0; i < 32; i++) | |
1430 | if (error_reg1 & (1<<i)) | |
1431 | switch (i) | |
1432 | { | |
1433 | case SPIDER_NET_GTMFLLINT: | |
11f1a52b | 1434 | if (netif_msg_intr(card) && net_ratelimit()) |
aaec0fab JO |
1435 | pr_err("Spider TX RAM full\n"); |
1436 | show_error = 0; | |
1437 | break; | |
11f1a52b AB |
1438 | case SPIDER_NET_GRFDFLLINT: /* fallthrough */ |
1439 | case SPIDER_NET_GRFCFLLINT: /* fallthrough */ | |
1440 | case SPIDER_NET_GRFBFLLINT: /* fallthrough */ | |
1441 | case SPIDER_NET_GRFAFLLINT: /* fallthrough */ | |
aaec0fab | 1442 | case SPIDER_NET_GRMFLLINT: |
11f1a52b | 1443 | if (netif_msg_intr(card) && net_ratelimit()) |
4e5077b6 | 1444 | pr_debug("Spider RX RAM full, incoming packets " |
11f1a52b AB |
1445 | "might be discarded!\n"); |
1446 | spider_net_rx_irq_off(card); | |
1447 | tasklet_schedule(&card->rxram_full_tl); | |
1448 | show_error = 0; | |
aaec0fab JO |
1449 | break; |
1450 | ||
1451 | /* case SPIDER_NET_GTMSHTINT: problem, print a message */ | |
1452 | case SPIDER_NET_GDTINVDINT: | |
1453 | /* allrighty. tx from previous descr ok */ | |
1454 | show_error = 0; | |
1455 | break; | |
aaec0fab JO |
1456 | |
1457 | /* chain end */ | |
1458 | case SPIDER_NET_GDDDCEINT: /* fallthrough */ | |
1459 | case SPIDER_NET_GDCDCEINT: /* fallthrough */ | |
1460 | case SPIDER_NET_GDBDCEINT: /* fallthrough */ | |
1461 | case SPIDER_NET_GDADCEINT: | |
1462 | if (netif_msg_intr(card)) | |
1463 | pr_err("got descriptor chain end interrupt, " | |
1464 | "restarting DMAC %c.\n", | |
1465 | 'D'+i-SPIDER_NET_GDDDCEINT); | |
1466 | spider_net_refill_rx_chain(card); | |
11f1a52b | 1467 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
1468 | show_error = 0; |
1469 | break; | |
1470 | ||
1471 | /* invalid descriptor */ | |
1472 | case SPIDER_NET_GDDINVDINT: /* fallthrough */ | |
1473 | case SPIDER_NET_GDCINVDINT: /* fallthrough */ | |
1474 | case SPIDER_NET_GDBINVDINT: /* fallthrough */ | |
1475 | case SPIDER_NET_GDAINVDINT: | |
1476 | /* could happen when rx chain is full */ | |
1477 | spider_net_refill_rx_chain(card); | |
11f1a52b | 1478 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
1479 | show_error = 0; |
1480 | break; | |
1481 | ||
1482 | /* case SPIDER_NET_GDTRSERINT: problem, print a message */ | |
1483 | /* case SPIDER_NET_GDDRSERINT: problem, print a message */ | |
1484 | /* case SPIDER_NET_GDCRSERINT: problem, print a message */ | |
1485 | /* case SPIDER_NET_GDBRSERINT: problem, print a message */ | |
1486 | /* case SPIDER_NET_GDARSERINT: problem, print a message */ | |
1487 | /* case SPIDER_NET_GDSERINT: problem, print a message */ | |
1488 | /* case SPIDER_NET_GDTPTERINT: problem, print a message */ | |
1489 | /* case SPIDER_NET_GDDPTERINT: problem, print a message */ | |
1490 | /* case SPIDER_NET_GDCPTERINT: problem, print a message */ | |
1491 | /* case SPIDER_NET_GDBPTERINT: problem, print a message */ | |
1492 | /* case SPIDER_NET_GDAPTERINT: problem, print a message */ | |
1493 | default: | |
1494 | show_error = 1; | |
1495 | break; | |
1496 | } | |
1497 | ||
1498 | /* check GHIINT2STS ************************************/ | |
1499 | if (error_reg2) | |
1500 | for (i = 0; i < 32; i++) | |
1501 | if (error_reg2 & (1<<i)) | |
1502 | switch (i) | |
1503 | { | |
1504 | /* there is nothing we can (want to) do at this time. Log a | |
1505 | * message, we can switch on and off the specific values later on | |
1506 | case SPIDER_NET_GPROPERINT: | |
1507 | case SPIDER_NET_GMCTCRSNGINT: | |
1508 | case SPIDER_NET_GMCTLCOLINT: | |
1509 | case SPIDER_NET_GMCTTMOTINT: | |
1510 | case SPIDER_NET_GMCRCAERINT: | |
1511 | case SPIDER_NET_GMCRCALERINT: | |
1512 | case SPIDER_NET_GMCRALNERINT: | |
1513 | case SPIDER_NET_GMCROVRINT: | |
1514 | case SPIDER_NET_GMCRRNTINT: | |
1515 | case SPIDER_NET_GMCRRXERINT: | |
1516 | case SPIDER_NET_GTITCSERINT: | |
1517 | case SPIDER_NET_GTIFMTERINT: | |
1518 | case SPIDER_NET_GTIPKTRVKINT: | |
1519 | case SPIDER_NET_GTISPINGINT: | |
1520 | case SPIDER_NET_GTISADNGINT: | |
1521 | case SPIDER_NET_GTISPDNGINT: | |
1522 | case SPIDER_NET_GRIFMTERINT: | |
1523 | case SPIDER_NET_GRIPKTRVKINT: | |
1524 | case SPIDER_NET_GRISPINGINT: | |
1525 | case SPIDER_NET_GRISADNGINT: | |
1526 | case SPIDER_NET_GRISPDNGINT: | |
1527 | break; | |
1528 | */ | |
1529 | default: | |
1530 | break; | |
1531 | } | |
1532 | ||
1533 | if ((show_error) && (netif_msg_intr(card))) | |
1534 | pr_err("Got error interrupt, GHIINT0STS = 0x%08x, " | |
1535 | "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", | |
1536 | status_reg, error_reg1, error_reg2); | |
1537 | ||
1538 | /* clear interrupt sources */ | |
1539 | spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); | |
1540 | spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); | |
1541 | } | |
1542 | ||
1543 | /** | |
1544 | * spider_net_interrupt - interrupt handler for spider_net | |
1545 | * @irq: interupt number | |
1546 | * @ptr: pointer to net_device | |
1547 | * @regs: PU registers | |
1548 | * | |
1549 | * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no | |
1550 | * interrupt found raised by card. | |
1551 | * | |
1552 | * This is the interrupt handler, that turns off | |
1553 | * interrupts for this device and makes the stack poll the driver | |
1554 | */ | |
1555 | static irqreturn_t | |
1556 | spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs) | |
1557 | { | |
1558 | struct net_device *netdev = ptr; | |
1559 | struct spider_net_card *card = netdev_priv(netdev); | |
1560 | u32 status_reg; | |
1561 | ||
1562 | status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); | |
1563 | ||
1564 | if (!status_reg) | |
1565 | return IRQ_NONE; | |
1566 | ||
aaec0fab JO |
1567 | if (status_reg & SPIDER_NET_RXINT ) { |
1568 | spider_net_rx_irq_off(card); | |
1569 | netif_rx_schedule(netdev); | |
1570 | } | |
1571 | ||
11f1a52b AB |
1572 | if (status_reg & SPIDER_NET_ERRINT ) |
1573 | spider_net_handle_error_irq(card, status_reg); | |
aaec0fab JO |
1574 | |
1575 | /* clear interrupt sources */ | |
1576 | spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); | |
1577 | ||
1578 | return IRQ_HANDLED; | |
1579 | } | |
1580 | ||
1581 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1582 | /** | |
1583 | * spider_net_poll_controller - artificial interrupt for netconsole etc. | |
1584 | * @netdev: interface device structure | |
1585 | * | |
1586 | * see Documentation/networking/netconsole.txt | |
1587 | */ | |
1588 | static void | |
1589 | spider_net_poll_controller(struct net_device *netdev) | |
1590 | { | |
1591 | disable_irq(netdev->irq); | |
1592 | spider_net_interrupt(netdev->irq, netdev, NULL); | |
1593 | enable_irq(netdev->irq); | |
1594 | } | |
1595 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1596 | ||
1597 | /** | |
1598 | * spider_net_init_card - initializes the card | |
1599 | * @card: card structure | |
1600 | * | |
1601 | * spider_net_init_card initializes the card so that other registers can | |
1602 | * be used | |
1603 | */ | |
1604 | static void | |
1605 | spider_net_init_card(struct spider_net_card *card) | |
1606 | { | |
1607 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1608 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1609 | ||
1610 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1611 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
1612 | } | |
1613 | ||
1614 | /** | |
1615 | * spider_net_enable_card - enables the card by setting all kinds of regs | |
1616 | * @card: card structure | |
1617 | * | |
1618 | * spider_net_enable_card sets a lot of SMMIO registers to enable the device | |
1619 | */ | |
1620 | static void | |
1621 | spider_net_enable_card(struct spider_net_card *card) | |
1622 | { | |
1623 | int i; | |
1624 | /* the following array consists of (register),(value) pairs | |
1625 | * that are set in this function. A register of 0 ends the list */ | |
1626 | u32 regs[][2] = { | |
1627 | { SPIDER_NET_GRESUMINTNUM, 0 }, | |
1628 | { SPIDER_NET_GREINTNUM, 0 }, | |
1629 | ||
1630 | /* set interrupt frame number registers */ | |
1631 | /* clear the single DMA engine registers first */ | |
1632 | { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1633 | { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1634 | { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1635 | { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1636 | /* then set, what we really need */ | |
1637 | { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, | |
1638 | ||
1639 | /* timer counter registers and stuff */ | |
1640 | { SPIDER_NET_GFREECNNUM, 0 }, | |
1641 | { SPIDER_NET_GONETIMENUM, 0 }, | |
1642 | { SPIDER_NET_GTOUTFRMNUM, 0 }, | |
1643 | ||
1644 | /* RX mode setting */ | |
1645 | { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, | |
1646 | /* TX mode setting */ | |
1647 | { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, | |
1648 | /* IPSEC mode setting */ | |
1649 | { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, | |
1650 | ||
1651 | { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, | |
1652 | ||
1653 | { SPIDER_NET_GMRWOLCTRL, 0 }, | |
b636d17a JO |
1654 | { SPIDER_NET_GTESTMD, 0x10000000 }, |
1655 | { SPIDER_NET_GTTQMSK, 0x00400040 }, | |
aaec0fab JO |
1656 | { SPIDER_NET_GTESTMD, 0 }, |
1657 | ||
1658 | { SPIDER_NET_GMACINTEN, 0 }, | |
1659 | ||
1660 | /* flow control stuff */ | |
1661 | { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, | |
1662 | { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, | |
1663 | ||
1664 | { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, | |
1665 | { 0, 0} | |
1666 | }; | |
1667 | ||
1668 | i = 0; | |
1669 | while (regs[i][0]) { | |
1670 | spider_net_write_reg(card, regs[i][0], regs[i][1]); | |
1671 | i++; | |
1672 | } | |
1673 | ||
1674 | /* clear unicast filter table entries 1 to 14 */ | |
1675 | for (i = 1; i <= 14; i++) { | |
1676 | spider_net_write_reg(card, | |
1677 | SPIDER_NET_GMRUAFILnR + i * 8, | |
1678 | 0x00080000); | |
1679 | spider_net_write_reg(card, | |
1680 | SPIDER_NET_GMRUAFILnR + i * 8 + 4, | |
1681 | 0x00000000); | |
1682 | } | |
1683 | ||
1684 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); | |
1685 | ||
1686 | spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); | |
1687 | ||
1688 | /* set chain tail adress for RX chains and | |
1689 | * enable DMA */ | |
1690 | spider_net_enable_rxchtails(card); | |
1691 | spider_net_enable_rxdmac(card); | |
1692 | ||
1693 | spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); | |
1694 | ||
1695 | /* set chain tail adress for TX chain */ | |
1696 | spider_net_enable_txdmac(card); | |
1697 | ||
1698 | spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, | |
1699 | SPIDER_NET_LENLMT_VALUE); | |
1700 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, | |
1701 | SPIDER_NET_MACMODE_VALUE); | |
1702 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, | |
1703 | SPIDER_NET_OPMODE_VALUE); | |
1704 | ||
1705 | /* set interrupt mask registers */ | |
1706 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, | |
1707 | SPIDER_NET_INT0_MASK_VALUE); | |
1708 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, | |
1709 | SPIDER_NET_INT1_MASK_VALUE); | |
1710 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, | |
1711 | SPIDER_NET_INT2_MASK_VALUE); | |
1712 | } | |
1713 | ||
1714 | /** | |
1715 | * spider_net_open - called upon ifonfig up | |
1716 | * @netdev: interface device structure | |
1717 | * | |
1718 | * returns 0 on success, <0 on failure | |
1719 | * | |
1720 | * spider_net_open allocates all the descriptors and memory needed for | |
1721 | * operation, sets up multicast list and enables interrupts | |
1722 | */ | |
1723 | int | |
1724 | spider_net_open(struct net_device *netdev) | |
1725 | { | |
1726 | struct spider_net_card *card = netdev_priv(netdev); | |
1727 | int result; | |
1728 | ||
1729 | result = -ENOMEM; | |
1730 | if (spider_net_init_chain(card, &card->tx_chain, | |
1731 | card->descr, tx_descriptors)) | |
1732 | goto alloc_tx_failed; | |
1733 | if (spider_net_init_chain(card, &card->rx_chain, | |
1734 | card->descr + tx_descriptors, rx_descriptors)) | |
1735 | goto alloc_rx_failed; | |
1736 | ||
1737 | /* allocate rx skbs */ | |
1738 | if (spider_net_alloc_rx_skbs(card)) | |
1739 | goto alloc_skbs_failed; | |
1740 | ||
1741 | spider_net_set_multi(netdev); | |
1742 | ||
1743 | /* further enhancement: setup hw vlan, if needed */ | |
1744 | ||
1745 | result = -EBUSY; | |
1746 | if (request_irq(netdev->irq, spider_net_interrupt, | |
1fb9df5d | 1747 | IRQF_SHARED, netdev->name, netdev)) |
aaec0fab JO |
1748 | goto register_int_failed; |
1749 | ||
1750 | spider_net_enable_card(card); | |
1751 | ||
543cec51 JO |
1752 | netif_start_queue(netdev); |
1753 | netif_carrier_on(netdev); | |
1754 | netif_poll_enable(netdev); | |
1755 | ||
aaec0fab JO |
1756 | return 0; |
1757 | ||
1758 | register_int_failed: | |
1759 | spider_net_free_rx_chain_contents(card); | |
1760 | alloc_skbs_failed: | |
1761 | spider_net_free_chain(card, &card->rx_chain); | |
1762 | alloc_rx_failed: | |
1763 | spider_net_free_chain(card, &card->tx_chain); | |
1764 | alloc_tx_failed: | |
1765 | return result; | |
1766 | } | |
1767 | ||
1768 | /** | |
1769 | * spider_net_setup_phy - setup PHY | |
1770 | * @card: card structure | |
1771 | * | |
1772 | * returns 0 on success, <0 on failure | |
1773 | * | |
1774 | * spider_net_setup_phy is used as part of spider_net_probe. Sets | |
1775 | * the PHY to 1000 Mbps | |
1776 | **/ | |
1777 | static int | |
1778 | spider_net_setup_phy(struct spider_net_card *card) | |
1779 | { | |
1780 | struct mii_phy *phy = &card->phy; | |
1781 | ||
1782 | spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, | |
1783 | SPIDER_NET_DMASEL_VALUE); | |
1784 | spider_net_write_reg(card, SPIDER_NET_GPCCTRL, | |
1785 | SPIDER_NET_PHY_CTRL_VALUE); | |
1786 | phy->mii_id = 1; | |
1787 | phy->dev = card->netdev; | |
1788 | phy->mdio_read = spider_net_read_phy; | |
1789 | phy->mdio_write = spider_net_write_phy; | |
1790 | ||
1791 | mii_phy_probe(phy, phy->mii_id); | |
1792 | ||
1793 | if (phy->def->ops->setup_forced) | |
1794 | phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL); | |
1795 | ||
8ec93459 | 1796 | phy->def->ops->enable_fiber(phy); |
53abbf7e | 1797 | |
aaec0fab JO |
1798 | phy->def->ops->read_link(phy); |
1799 | pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name, | |
1800 | phy->speed, phy->duplex==1 ? "Full" : "Half"); | |
1801 | ||
1802 | return 0; | |
1803 | } | |
1804 | ||
1805 | /** | |
1806 | * spider_net_download_firmware - loads firmware into the adapter | |
1807 | * @card: card structure | |
11f1a52b | 1808 | * @firmware_ptr: pointer to firmware data |
aaec0fab | 1809 | * |
11f1a52b AB |
1810 | * spider_net_download_firmware loads the firmware data into the |
1811 | * adapter. It assumes the length etc. to be allright. | |
aaec0fab | 1812 | */ |
0d3ea166 | 1813 | static int |
aaec0fab | 1814 | spider_net_download_firmware(struct spider_net_card *card, |
11f1a52b | 1815 | u8 *firmware_ptr) |
aaec0fab JO |
1816 | { |
1817 | int sequencer, i; | |
11f1a52b | 1818 | u32 *fw_ptr = (u32 *)firmware_ptr; |
aaec0fab JO |
1819 | |
1820 | /* stop sequencers */ | |
1821 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1822 | SPIDER_NET_STOP_SEQ_VALUE); | |
1823 | ||
11f1a52b AB |
1824 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
1825 | sequencer++) { | |
aaec0fab JO |
1826 | spider_net_write_reg(card, |
1827 | SPIDER_NET_GSnPRGADR + sequencer * 8, 0); | |
11f1a52b | 1828 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
aaec0fab JO |
1829 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
1830 | sequencer * 8, *fw_ptr); | |
1831 | fw_ptr++; | |
1832 | } | |
1833 | } | |
1834 | ||
0d3ea166 AB |
1835 | if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) |
1836 | return -EIO; | |
1837 | ||
aaec0fab JO |
1838 | spider_net_write_reg(card, SPIDER_NET_GSINIT, |
1839 | SPIDER_NET_RUN_SEQ_VALUE); | |
0d3ea166 AB |
1840 | |
1841 | return 0; | |
aaec0fab JO |
1842 | } |
1843 | ||
1844 | /** | |
1845 | * spider_net_init_firmware - reads in firmware parts | |
1846 | * @card: card structure | |
1847 | * | |
1848 | * Returns 0 on success, <0 on failure | |
1849 | * | |
1850 | * spider_net_init_firmware opens the sequencer firmware and does some basic | |
1851 | * checks. This function opens and releases the firmware structure. A call | |
1852 | * to download the firmware is performed before the release. | |
1853 | * | |
1854 | * Firmware format | |
1855 | * =============== | |
1856 | * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being | |
1857 | * the program for each sequencer. Use the command | |
1858 | * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ | |
1859 | * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ | |
1860 | * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin | |
1861 | * | |
1862 | * to generate spider_fw.bin, if you have sequencer programs with something | |
1863 | * like the following contents for each sequencer: | |
1864 | * <ONE LINE COMMENT> | |
1865 | * <FIRST 4-BYTES-WORD FOR SEQUENCER> | |
1866 | * <SECOND 4-BYTES-WORD FOR SEQUENCER> | |
1867 | * ... | |
1868 | * <1024th 4-BYTES-WORD FOR SEQUENCER> | |
1869 | */ | |
1870 | static int | |
1871 | spider_net_init_firmware(struct spider_net_card *card) | |
1872 | { | |
11f1a52b | 1873 | struct firmware *firmware = NULL; |
030d6753 | 1874 | struct device_node *dn; |
11f1a52b AB |
1875 | u8 *fw_prop = NULL; |
1876 | int err = -ENOENT; | |
1877 | int fw_size; | |
aaec0fab | 1878 | |
030d6753 | 1879 | if (request_firmware((const struct firmware **)&firmware, |
11f1a52b AB |
1880 | SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { |
1881 | if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && | |
1882 | netif_msg_probe(card) ) { | |
1883 | pr_err("Incorrect size of spidernet firmware in " \ | |
1884 | "filesystem. Looking in host firmware...\n"); | |
1885 | goto try_host_fw; | |
1886 | } | |
1887 | err = spider_net_download_firmware(card, firmware->data); | |
030d6753 | 1888 | |
11f1a52b AB |
1889 | release_firmware(firmware); |
1890 | if (err) | |
1891 | goto try_host_fw; | |
030d6753 | 1892 | |
11f1a52b | 1893 | goto done; |
aaec0fab JO |
1894 | } |
1895 | ||
11f1a52b AB |
1896 | try_host_fw: |
1897 | dn = pci_device_to_OF_node(card->pdev); | |
1898 | if (!dn) | |
1899 | goto out_err; | |
1900 | ||
1901 | fw_prop = (u8 *)get_property(dn, "firmware", &fw_size); | |
1902 | if (!fw_prop) | |
1903 | goto out_err; | |
1904 | ||
1905 | if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && | |
1906 | netif_msg_probe(card) ) { | |
1907 | pr_err("Incorrect size of spidernet firmware in " \ | |
1908 | "host firmware\n"); | |
1909 | goto done; | |
aaec0fab JO |
1910 | } |
1911 | ||
11f1a52b | 1912 | err = spider_net_download_firmware(card, fw_prop); |
aaec0fab | 1913 | |
11f1a52b AB |
1914 | done: |
1915 | return err; | |
1916 | out_err: | |
1917 | if (netif_msg_probe(card)) | |
1918 | pr_err("Couldn't find spidernet firmware in filesystem " \ | |
1919 | "or host firmware\n"); | |
aaec0fab JO |
1920 | return err; |
1921 | } | |
1922 | ||
1923 | /** | |
1924 | * spider_net_workaround_rxramfull - work around firmware bug | |
1925 | * @card: card structure | |
1926 | * | |
1927 | * no return value | |
1928 | **/ | |
1929 | static void | |
1930 | spider_net_workaround_rxramfull(struct spider_net_card *card) | |
1931 | { | |
1932 | int i, sequencer = 0; | |
1933 | ||
1934 | /* cancel reset */ | |
1935 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1936 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
1937 | ||
1938 | /* empty sequencer data */ | |
11f1a52b AB |
1939 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
1940 | sequencer++) { | |
ee962a5c | 1941 | spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + |
aaec0fab | 1942 | sequencer * 8, 0x0); |
11f1a52b | 1943 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
aaec0fab JO |
1944 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
1945 | sequencer * 8, 0x0); | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | /* set sequencer operation */ | |
1950 | spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); | |
1951 | ||
1952 | /* reset */ | |
1953 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1954 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1955 | } | |
1956 | ||
1957 | /** | |
1958 | * spider_net_tx_timeout_task - task scheduled by the watchdog timeout | |
1959 | * function (to be called not under interrupt status) | |
1960 | * @data: data, is interface device structure | |
1961 | * | |
1962 | * called as task when tx hangs, resets interface (if interface is up) | |
1963 | */ | |
1964 | static void | |
1965 | spider_net_tx_timeout_task(void *data) | |
1966 | { | |
1967 | struct net_device *netdev = data; | |
1968 | struct spider_net_card *card = netdev_priv(netdev); | |
1969 | ||
1970 | if (!(netdev->flags & IFF_UP)) | |
1971 | goto out; | |
1972 | ||
1973 | netif_device_detach(netdev); | |
1974 | spider_net_stop(netdev); | |
1975 | ||
1976 | spider_net_workaround_rxramfull(card); | |
1977 | spider_net_init_card(card); | |
1978 | ||
1979 | if (spider_net_setup_phy(card)) | |
1980 | goto out; | |
1981 | if (spider_net_init_firmware(card)) | |
1982 | goto out; | |
1983 | ||
1984 | spider_net_open(netdev); | |
1985 | spider_net_kick_tx_dma(card, card->tx_chain.head); | |
1986 | netif_device_attach(netdev); | |
1987 | ||
1988 | out: | |
1989 | atomic_dec(&card->tx_timeout_task_counter); | |
1990 | } | |
1991 | ||
1992 | /** | |
1993 | * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. | |
1994 | * @netdev: interface device structure | |
1995 | * | |
1996 | * called, if tx hangs. Schedules a task that resets the interface | |
1997 | */ | |
1998 | static void | |
1999 | spider_net_tx_timeout(struct net_device *netdev) | |
2000 | { | |
2001 | struct spider_net_card *card; | |
2002 | ||
2003 | card = netdev_priv(netdev); | |
2004 | atomic_inc(&card->tx_timeout_task_counter); | |
2005 | if (netdev->flags & IFF_UP) | |
2006 | schedule_work(&card->tx_timeout_task); | |
2007 | else | |
2008 | atomic_dec(&card->tx_timeout_task_counter); | |
2009 | } | |
2010 | ||
2011 | /** | |
2012 | * spider_net_setup_netdev_ops - initialization of net_device operations | |
2013 | * @netdev: net_device structure | |
2014 | * | |
2015 | * fills out function pointers in the net_device structure | |
2016 | */ | |
2017 | static void | |
2018 | spider_net_setup_netdev_ops(struct net_device *netdev) | |
2019 | { | |
2020 | netdev->open = &spider_net_open; | |
2021 | netdev->stop = &spider_net_stop; | |
2022 | netdev->hard_start_xmit = &spider_net_xmit; | |
2023 | netdev->get_stats = &spider_net_get_stats; | |
2024 | netdev->set_multicast_list = &spider_net_set_multi; | |
2025 | netdev->set_mac_address = &spider_net_set_mac; | |
2026 | netdev->change_mtu = &spider_net_change_mtu; | |
2027 | netdev->do_ioctl = &spider_net_do_ioctl; | |
2028 | /* tx watchdog */ | |
2029 | netdev->tx_timeout = &spider_net_tx_timeout; | |
2030 | netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; | |
2031 | /* NAPI */ | |
2032 | netdev->poll = &spider_net_poll; | |
2033 | netdev->weight = SPIDER_NET_NAPI_WEIGHT; | |
2034 | /* HW VLAN */ | |
2035 | netdev->vlan_rx_register = &spider_net_vlan_rx_reg; | |
2036 | netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add; | |
2037 | netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill; | |
2038 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2039 | /* poll controller */ | |
2040 | netdev->poll_controller = &spider_net_poll_controller; | |
2041 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
2042 | /* ethtool ops */ | |
2043 | netdev->ethtool_ops = &spider_net_ethtool_ops; | |
2044 | } | |
2045 | ||
2046 | /** | |
2047 | * spider_net_setup_netdev - initialization of net_device | |
2048 | * @card: card structure | |
2049 | * | |
2050 | * Returns 0 on success or <0 on failure | |
2051 | * | |
2052 | * spider_net_setup_netdev initializes the net_device structure | |
2053 | **/ | |
2054 | static int | |
2055 | spider_net_setup_netdev(struct spider_net_card *card) | |
2056 | { | |
2057 | int result; | |
2058 | struct net_device *netdev = card->netdev; | |
2059 | struct device_node *dn; | |
2060 | struct sockaddr addr; | |
2061 | u8 *mac; | |
2062 | ||
2063 | SET_MODULE_OWNER(netdev); | |
2064 | SET_NETDEV_DEV(netdev, &card->pdev->dev); | |
2065 | ||
2066 | pci_set_drvdata(card->pdev, netdev); | |
11f1a52b AB |
2067 | |
2068 | atomic_set(&card->tx_chain_release,0); | |
2069 | card->rxram_full_tl.data = (unsigned long) card; | |
2070 | card->rxram_full_tl.func = | |
2071 | (void (*)(unsigned long)) spider_net_handle_rxram_full; | |
2072 | init_timer(&card->tx_timer); | |
2073 | card->tx_timer.function = | |
2074 | (void (*)(unsigned long)) spider_net_cleanup_tx_ring; | |
2075 | card->tx_timer.data = (unsigned long) card; | |
aaec0fab JO |
2076 | netdev->irq = card->pdev->irq; |
2077 | ||
2078 | card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT; | |
2079 | ||
2080 | spider_net_setup_netdev_ops(netdev); | |
2081 | ||
8dfc914a | 2082 | netdev->features = NETIF_F_HW_CSUM; |
aaec0fab JO |
2083 | /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | |
2084 | * NETIF_F_HW_VLAN_FILTER */ | |
2085 | ||
2086 | netdev->irq = card->pdev->irq; | |
2087 | ||
2088 | dn = pci_device_to_OF_node(card->pdev); | |
543cec51 JO |
2089 | if (!dn) |
2090 | return -EIO; | |
2091 | ||
aaec0fab | 2092 | mac = (u8 *)get_property(dn, "local-mac-address", NULL); |
543cec51 JO |
2093 | if (!mac) |
2094 | return -EIO; | |
aaec0fab JO |
2095 | memcpy(addr.sa_data, mac, ETH_ALEN); |
2096 | ||
2097 | result = spider_net_set_mac(netdev, &addr); | |
2098 | if ((result) && (netif_msg_probe(card))) | |
2099 | pr_err("Failed to set MAC address: %i\n", result); | |
2100 | ||
2101 | result = register_netdev(netdev); | |
2102 | if (result) { | |
2103 | if (netif_msg_probe(card)) | |
2104 | pr_err("Couldn't register net_device: %i\n", | |
2105 | result); | |
2106 | return result; | |
2107 | } | |
2108 | ||
2109 | if (netif_msg_probe(card)) | |
2110 | pr_info("Initialized device %s.\n", netdev->name); | |
2111 | ||
2112 | return 0; | |
2113 | } | |
2114 | ||
2115 | /** | |
2116 | * spider_net_alloc_card - allocates net_device and card structure | |
2117 | * | |
2118 | * returns the card structure or NULL in case of errors | |
2119 | * | |
2120 | * the card and net_device structures are linked to each other | |
2121 | */ | |
2122 | static struct spider_net_card * | |
2123 | spider_net_alloc_card(void) | |
2124 | { | |
2125 | struct net_device *netdev; | |
2126 | struct spider_net_card *card; | |
2127 | size_t alloc_size; | |
2128 | ||
2129 | alloc_size = sizeof (*card) + | |
2130 | sizeof (struct spider_net_descr) * rx_descriptors + | |
2131 | sizeof (struct spider_net_descr) * tx_descriptors; | |
2132 | netdev = alloc_etherdev(alloc_size); | |
2133 | if (!netdev) | |
2134 | return NULL; | |
2135 | ||
2136 | card = netdev_priv(netdev); | |
2137 | card->netdev = netdev; | |
2138 | card->msg_enable = SPIDER_NET_DEFAULT_MSG; | |
2139 | INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev); | |
2140 | init_waitqueue_head(&card->waitq); | |
2141 | atomic_set(&card->tx_timeout_task_counter, 0); | |
2142 | ||
2143 | return card; | |
2144 | } | |
2145 | ||
2146 | /** | |
2147 | * spider_net_undo_pci_setup - releases PCI ressources | |
2148 | * @card: card structure | |
2149 | * | |
2150 | * spider_net_undo_pci_setup releases the mapped regions | |
2151 | */ | |
2152 | static void | |
2153 | spider_net_undo_pci_setup(struct spider_net_card *card) | |
2154 | { | |
2155 | iounmap(card->regs); | |
2156 | pci_release_regions(card->pdev); | |
2157 | } | |
2158 | ||
2159 | /** | |
2160 | * spider_net_setup_pci_dev - sets up the device in terms of PCI operations | |
2161 | * @card: card structure | |
2162 | * @pdev: PCI device | |
2163 | * | |
2164 | * Returns the card structure or NULL if any errors occur | |
2165 | * | |
2166 | * spider_net_setup_pci_dev initializes pdev and together with the | |
2167 | * functions called in spider_net_open configures the device so that | |
2168 | * data can be transferred over it | |
2169 | * The net_device structure is attached to the card structure, if the | |
2170 | * function returns without error. | |
2171 | **/ | |
2172 | static struct spider_net_card * | |
2173 | spider_net_setup_pci_dev(struct pci_dev *pdev) | |
2174 | { | |
2175 | struct spider_net_card *card; | |
2176 | unsigned long mmio_start, mmio_len; | |
2177 | ||
2178 | if (pci_enable_device(pdev)) { | |
2179 | pr_err("Couldn't enable PCI device\n"); | |
2180 | return NULL; | |
2181 | } | |
2182 | ||
2183 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
2184 | pr_err("Couldn't find proper PCI device base address.\n"); | |
2185 | goto out_disable_dev; | |
2186 | } | |
2187 | ||
2188 | if (pci_request_regions(pdev, spider_net_driver_name)) { | |
2189 | pr_err("Couldn't obtain PCI resources, aborting.\n"); | |
2190 | goto out_disable_dev; | |
2191 | } | |
2192 | ||
2193 | pci_set_master(pdev); | |
2194 | ||
2195 | card = spider_net_alloc_card(); | |
2196 | if (!card) { | |
2197 | pr_err("Couldn't allocate net_device structure, " | |
2198 | "aborting.\n"); | |
2199 | goto out_release_regions; | |
2200 | } | |
2201 | card->pdev = pdev; | |
2202 | ||
2203 | /* fetch base address and length of first resource */ | |
2204 | mmio_start = pci_resource_start(pdev, 0); | |
2205 | mmio_len = pci_resource_len(pdev, 0); | |
2206 | ||
2207 | card->netdev->mem_start = mmio_start; | |
2208 | card->netdev->mem_end = mmio_start + mmio_len; | |
2209 | card->regs = ioremap(mmio_start, mmio_len); | |
2210 | ||
2211 | if (!card->regs) { | |
2212 | pr_err("Couldn't obtain PCI resources, aborting.\n"); | |
2213 | goto out_release_regions; | |
2214 | } | |
2215 | ||
2216 | return card; | |
2217 | ||
2218 | out_release_regions: | |
2219 | pci_release_regions(pdev); | |
2220 | out_disable_dev: | |
2221 | pci_disable_device(pdev); | |
2222 | pci_set_drvdata(pdev, NULL); | |
2223 | return NULL; | |
2224 | } | |
2225 | ||
2226 | /** | |
2227 | * spider_net_probe - initialization of a device | |
2228 | * @pdev: PCI device | |
2229 | * @ent: entry in the device id list | |
2230 | * | |
2231 | * Returns 0 on success, <0 on failure | |
2232 | * | |
2233 | * spider_net_probe initializes pdev and registers a net_device | |
2234 | * structure for it. After that, the device can be ifconfig'ed up | |
2235 | **/ | |
2236 | static int __devinit | |
2237 | spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
2238 | { | |
2239 | int err = -EIO; | |
2240 | struct spider_net_card *card; | |
2241 | ||
2242 | card = spider_net_setup_pci_dev(pdev); | |
2243 | if (!card) | |
2244 | goto out; | |
2245 | ||
2246 | spider_net_workaround_rxramfull(card); | |
2247 | spider_net_init_card(card); | |
2248 | ||
2249 | err = spider_net_setup_phy(card); | |
2250 | if (err) | |
2251 | goto out_undo_pci; | |
2252 | ||
2253 | err = spider_net_init_firmware(card); | |
2254 | if (err) | |
2255 | goto out_undo_pci; | |
2256 | ||
2257 | err = spider_net_setup_netdev(card); | |
2258 | if (err) | |
2259 | goto out_undo_pci; | |
2260 | ||
2261 | return 0; | |
2262 | ||
2263 | out_undo_pci: | |
2264 | spider_net_undo_pci_setup(card); | |
2265 | free_netdev(card->netdev); | |
2266 | out: | |
2267 | return err; | |
2268 | } | |
2269 | ||
2270 | /** | |
2271 | * spider_net_remove - removal of a device | |
2272 | * @pdev: PCI device | |
2273 | * | |
2274 | * Returns 0 on success, <0 on failure | |
2275 | * | |
2276 | * spider_net_remove is called to remove the device and unregisters the | |
2277 | * net_device | |
2278 | **/ | |
2279 | static void __devexit | |
2280 | spider_net_remove(struct pci_dev *pdev) | |
2281 | { | |
2282 | struct net_device *netdev; | |
2283 | struct spider_net_card *card; | |
2284 | ||
2285 | netdev = pci_get_drvdata(pdev); | |
2286 | card = netdev_priv(netdev); | |
2287 | ||
2288 | wait_event(card->waitq, | |
2289 | atomic_read(&card->tx_timeout_task_counter) == 0); | |
2290 | ||
2291 | unregister_netdev(netdev); | |
543cec51 JO |
2292 | |
2293 | /* switch off card */ | |
2294 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2295 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2296 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2297 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2298 | ||
aaec0fab JO |
2299 | spider_net_undo_pci_setup(card); |
2300 | free_netdev(netdev); | |
aaec0fab JO |
2301 | } |
2302 | ||
2303 | static struct pci_driver spider_net_driver = { | |
aaec0fab JO |
2304 | .name = spider_net_driver_name, |
2305 | .id_table = spider_net_pci_tbl, | |
2306 | .probe = spider_net_probe, | |
2307 | .remove = __devexit_p(spider_net_remove) | |
2308 | }; | |
2309 | ||
2310 | /** | |
2311 | * spider_net_init - init function when the driver is loaded | |
2312 | * | |
2313 | * spider_net_init registers the device driver | |
2314 | */ | |
2315 | static int __init spider_net_init(void) | |
2316 | { | |
2317 | if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { | |
2318 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; | |
2319 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2320 | } | |
2321 | if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { | |
2322 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; | |
2323 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2324 | } | |
2325 | if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { | |
2326 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; | |
2327 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2328 | } | |
2329 | if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { | |
2330 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; | |
2331 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2332 | } | |
2333 | ||
2334 | return pci_register_driver(&spider_net_driver); | |
2335 | } | |
2336 | ||
2337 | /** | |
2338 | * spider_net_cleanup - exit function when driver is unloaded | |
2339 | * | |
2340 | * spider_net_cleanup unregisters the device driver | |
2341 | */ | |
2342 | static void __exit spider_net_cleanup(void) | |
2343 | { | |
2344 | pci_unregister_driver(&spider_net_driver); | |
2345 | } | |
2346 | ||
2347 | module_init(spider_net_init); | |
2348 | module_exit(spider_net_cleanup); |