Commit | Line | Data |
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aaec0fab | 1 | /* |
3342cf0e | 2 | * Network device driver for Cell Processor-Based Blade and Celleb platform |
aaec0fab JO |
3 | * |
4 | * (C) Copyright IBM Corp. 2005 | |
3342cf0e | 5 | * (C) Copyright 2006 TOSHIBA CORPORATION |
aaec0fab JO |
6 | * |
7 | * Authors : Utz Bacher <utz.bacher@de.ibm.com> | |
8 | * Jens Osterkamp <Jens.Osterkamp@de.ibm.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2, or (at your option) | |
13 | * any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | */ | |
24 | ||
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"); | |
90f10841 | 59 | MODULE_VERSION(VERSION); |
aaec0fab JO |
60 | |
61 | static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; | |
62 | static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; | |
63 | ||
e2874f2e LV |
64 | module_param(rx_descriptors, int, 0444); |
65 | module_param(tx_descriptors, int, 0444); | |
aaec0fab JO |
66 | |
67 | MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ | |
68 | "in rx chains"); | |
69 | MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ | |
70 | "in tx chain"); | |
71 | ||
72 | char spider_net_driver_name[] = "spidernet"; | |
73 | ||
74 | static struct pci_device_id spider_net_pci_tbl[] = { | |
75 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, | |
76 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, | |
77 | { 0, } | |
78 | }; | |
79 | ||
80 | MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); | |
81 | ||
82 | /** | |
83 | * spider_net_read_reg - reads an SMMIO register of a card | |
84 | * @card: device structure | |
85 | * @reg: register to read from | |
86 | * | |
87 | * returns the content of the specified SMMIO register. | |
88 | */ | |
bdd01503 | 89 | static inline u32 |
aaec0fab JO |
90 | spider_net_read_reg(struct spider_net_card *card, u32 reg) |
91 | { | |
3bc0f40c BH |
92 | /* We use the powerpc specific variants instead of readl_be() because |
93 | * we know spidernet is not a real PCI device and we can thus avoid the | |
94 | * performance hit caused by the PCI workarounds. | |
95 | */ | |
96 | return in_be32(card->regs + reg); | |
aaec0fab JO |
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 | */ | |
bdd01503 | 105 | static inline void |
aaec0fab JO |
106 | spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) |
107 | { | |
3bc0f40c BH |
108 | /* We use the powerpc specific variants instead of writel_be() because |
109 | * we know spidernet is not a real PCI device and we can thus avoid the | |
110 | * performance hit caused by the PCI workarounds. | |
111 | */ | |
112 | out_be32(card->regs + reg, value); | |
aaec0fab JO |
113 | } |
114 | ||
aaec0fab JO |
115 | /** spider_net_write_phy - write to phy register |
116 | * @netdev: adapter to be written to | |
117 | * @mii_id: id of MII | |
118 | * @reg: PHY register | |
119 | * @val: value to be written to phy register | |
120 | * | |
121 | * spider_net_write_phy_register writes to an arbitrary PHY | |
122 | * register via the spider GPCWOPCMD register. We assume the queue does | |
123 | * not run full (not more than 15 commands outstanding). | |
124 | **/ | |
125 | static void | |
126 | spider_net_write_phy(struct net_device *netdev, int mii_id, | |
127 | int reg, int val) | |
128 | { | |
129 | struct spider_net_card *card = netdev_priv(netdev); | |
130 | u32 writevalue; | |
131 | ||
132 | writevalue = ((u32)mii_id << 21) | | |
133 | ((u32)reg << 16) | ((u32)val); | |
134 | ||
135 | spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); | |
136 | } | |
137 | ||
138 | /** spider_net_read_phy - read from phy register | |
139 | * @netdev: network device to be read from | |
140 | * @mii_id: id of MII | |
141 | * @reg: PHY register | |
142 | * | |
143 | * Returns value read from PHY register | |
144 | * | |
145 | * spider_net_write_phy reads from an arbitrary PHY | |
146 | * register via the spider GPCROPCMD register | |
147 | **/ | |
148 | static int | |
149 | spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) | |
150 | { | |
151 | struct spider_net_card *card = netdev_priv(netdev); | |
152 | u32 readvalue; | |
153 | ||
154 | readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); | |
155 | spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); | |
156 | ||
157 | /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT | |
158 | * interrupt, as we poll for the completion of the read operation | |
159 | * in spider_net_read_phy. Should take about 50 us */ | |
160 | do { | |
161 | readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); | |
162 | } while (readvalue & SPIDER_NET_GPREXEC); | |
163 | ||
164 | readvalue &= SPIDER_NET_GPRDAT_MASK; | |
165 | ||
166 | return readvalue; | |
167 | } | |
168 | ||
abdb66b5 KI |
169 | /** |
170 | * spider_net_setup_aneg - initial auto-negotiation setup | |
171 | * @card: device structure | |
172 | **/ | |
173 | static void | |
174 | spider_net_setup_aneg(struct spider_net_card *card) | |
175 | { | |
176 | struct mii_phy *phy = &card->phy; | |
177 | u32 advertise = 0; | |
a1c38a4a | 178 | u16 bmsr, estat; |
abdb66b5 | 179 | |
a1c38a4a IK |
180 | bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); |
181 | estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); | |
abdb66b5 KI |
182 | |
183 | if (bmsr & BMSR_10HALF) | |
184 | advertise |= ADVERTISED_10baseT_Half; | |
185 | if (bmsr & BMSR_10FULL) | |
186 | advertise |= ADVERTISED_10baseT_Full; | |
187 | if (bmsr & BMSR_100HALF) | |
188 | advertise |= ADVERTISED_100baseT_Half; | |
189 | if (bmsr & BMSR_100FULL) | |
190 | advertise |= ADVERTISED_100baseT_Full; | |
191 | ||
192 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) | |
193 | advertise |= SUPPORTED_1000baseT_Full; | |
194 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) | |
195 | advertise |= SUPPORTED_1000baseT_Half; | |
196 | ||
197 | mii_phy_probe(phy, phy->mii_id); | |
198 | phy->def->ops->setup_aneg(phy, advertise); | |
199 | ||
200 | } | |
201 | ||
aaec0fab | 202 | /** |
11f1a52b | 203 | * spider_net_rx_irq_off - switch off rx irq on this spider card |
aaec0fab JO |
204 | * @card: device structure |
205 | * | |
11f1a52b | 206 | * switches off rx irq by masking them out in the GHIINTnMSK register |
aaec0fab JO |
207 | */ |
208 | static void | |
11f1a52b | 209 | spider_net_rx_irq_off(struct spider_net_card *card) |
aaec0fab JO |
210 | { |
211 | u32 regvalue; | |
aaec0fab | 212 | |
11f1a52b AB |
213 | regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); |
214 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
215 | } |
216 | ||
217 | /** | |
11f1a52b | 218 | * spider_net_rx_irq_on - switch on rx irq on this spider card |
aaec0fab JO |
219 | * @card: device structure |
220 | * | |
11f1a52b | 221 | * switches on rx irq by enabling them in the GHIINTnMSK register |
aaec0fab JO |
222 | */ |
223 | static void | |
11f1a52b | 224 | spider_net_rx_irq_on(struct spider_net_card *card) |
aaec0fab JO |
225 | { |
226 | u32 regvalue; | |
aaec0fab | 227 | |
11f1a52b AB |
228 | regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; |
229 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
230 | } |
231 | ||
232 | /** | |
233 | * spider_net_set_promisc - sets the unicast address or the promiscuous mode | |
234 | * @card: card structure | |
235 | * | |
236 | * spider_net_set_promisc sets the unicast destination address filter and | |
237 | * thus either allows for non-promisc mode or promisc mode | |
238 | */ | |
239 | static void | |
240 | spider_net_set_promisc(struct spider_net_card *card) | |
241 | { | |
242 | u32 macu, macl; | |
243 | struct net_device *netdev = card->netdev; | |
244 | ||
245 | if (netdev->flags & IFF_PROMISC) { | |
246 | /* clear destination entry 0 */ | |
247 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); | |
248 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); | |
249 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
250 | SPIDER_NET_PROMISC_VALUE); | |
251 | } else { | |
252 | macu = netdev->dev_addr[0]; | |
253 | macu <<= 8; | |
254 | macu |= netdev->dev_addr[1]; | |
255 | memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); | |
256 | ||
257 | macu |= SPIDER_NET_UA_DESCR_VALUE; | |
258 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); | |
259 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); | |
260 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
261 | SPIDER_NET_NONPROMISC_VALUE); | |
262 | } | |
263 | } | |
264 | ||
265 | /** | |
266 | * spider_net_get_mac_address - read mac address from spider card | |
267 | * @card: device structure | |
268 | * | |
269 | * reads MAC address from GMACUNIMACU and GMACUNIMACL registers | |
270 | */ | |
271 | static int | |
272 | spider_net_get_mac_address(struct net_device *netdev) | |
273 | { | |
274 | struct spider_net_card *card = netdev_priv(netdev); | |
275 | u32 macl, macu; | |
276 | ||
277 | macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL); | |
278 | macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU); | |
279 | ||
280 | netdev->dev_addr[0] = (macu >> 24) & 0xff; | |
281 | netdev->dev_addr[1] = (macu >> 16) & 0xff; | |
282 | netdev->dev_addr[2] = (macu >> 8) & 0xff; | |
283 | netdev->dev_addr[3] = macu & 0xff; | |
284 | netdev->dev_addr[4] = (macl >> 8) & 0xff; | |
285 | netdev->dev_addr[5] = macl & 0xff; | |
286 | ||
287 | if (!is_valid_ether_addr(&netdev->dev_addr[0])) | |
288 | return -EINVAL; | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | /** | |
294 | * spider_net_get_descr_status -- returns the status of a descriptor | |
295 | * @descr: descriptor to look at | |
296 | * | |
297 | * returns the status as in the dmac_cmd_status field of the descriptor | |
298 | */ | |
bdd01503 | 299 | static inline int |
4cb6f9e5 | 300 | spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) |
aaec0fab | 301 | { |
4cb6f9e5 | 302 | return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; |
aaec0fab JO |
303 | } |
304 | ||
305 | /** | |
306 | * spider_net_free_chain - free descriptor chain | |
307 | * @card: card structure | |
308 | * @chain: address of chain | |
309 | * | |
310 | */ | |
311 | static void | |
312 | spider_net_free_chain(struct spider_net_card *card, | |
313 | struct spider_net_descr_chain *chain) | |
314 | { | |
315 | struct spider_net_descr *descr; | |
316 | ||
d4ed8f8d LV |
317 | descr = chain->ring; |
318 | do { | |
aaec0fab | 319 | descr->bus_addr = 0; |
4cb6f9e5 | 320 | descr->hwdescr->next_descr_addr = 0; |
d4ed8f8d LV |
321 | descr = descr->next; |
322 | } while (descr != chain->ring); | |
323 | ||
324 | dma_free_coherent(&card->pdev->dev, chain->num_desc, | |
4cb6f9e5 | 325 | chain->hwring, chain->dma_addr); |
aaec0fab JO |
326 | } |
327 | ||
328 | /** | |
d4ed8f8d | 329 | * spider_net_init_chain - alloc and link descriptor chain |
aaec0fab JO |
330 | * @card: card structure |
331 | * @chain: address of chain | |
aaec0fab | 332 | * |
d4ed8f8d | 333 | * We manage a circular list that mirrors the hardware structure, |
aaec0fab JO |
334 | * except that the hardware uses bus addresses. |
335 | * | |
d4ed8f8d | 336 | * Returns 0 on success, <0 on failure |
aaec0fab JO |
337 | */ |
338 | static int | |
339 | spider_net_init_chain(struct spider_net_card *card, | |
d4ed8f8d | 340 | struct spider_net_descr_chain *chain) |
aaec0fab JO |
341 | { |
342 | int i; | |
343 | struct spider_net_descr *descr; | |
4cb6f9e5 | 344 | struct spider_net_hw_descr *hwdescr; |
11f1a52b | 345 | dma_addr_t buf; |
d4ed8f8d | 346 | size_t alloc_size; |
aaec0fab | 347 | |
4cb6f9e5 | 348 | alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); |
aaec0fab | 349 | |
4cb6f9e5 | 350 | chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, |
d4ed8f8d | 351 | &chain->dma_addr, GFP_KERNEL); |
aaec0fab | 352 | |
4cb6f9e5 | 353 | if (!chain->hwring) |
d4ed8f8d | 354 | return -ENOMEM; |
aaec0fab | 355 | |
4cb6f9e5 | 356 | memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr)); |
d4ed8f8d LV |
357 | |
358 | /* Set up the hardware pointers in each descriptor */ | |
4cb6f9e5 LV |
359 | descr = chain->ring; |
360 | hwdescr = chain->hwring; | |
d4ed8f8d | 361 | buf = chain->dma_addr; |
4cb6f9e5 LV |
362 | for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { |
363 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; | |
364 | hwdescr->next_descr_addr = 0; | |
aaec0fab | 365 | |
4cb6f9e5 | 366 | descr->hwdescr = hwdescr; |
11f1a52b | 367 | descr->bus_addr = buf; |
aaec0fab JO |
368 | descr->next = descr + 1; |
369 | descr->prev = descr - 1; | |
370 | ||
4cb6f9e5 | 371 | buf += sizeof(struct spider_net_hw_descr); |
aaec0fab JO |
372 | } |
373 | /* do actual circular list */ | |
d4ed8f8d LV |
374 | (descr-1)->next = chain->ring; |
375 | chain->ring->prev = descr-1; | |
aaec0fab | 376 | |
bdd01503 | 377 | spin_lock_init(&chain->lock); |
d4ed8f8d LV |
378 | chain->head = chain->ring; |
379 | chain->tail = chain->ring; | |
aaec0fab | 380 | return 0; |
aaec0fab JO |
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; | |
64751910 | 395 | do { |
aaec0fab | 396 | if (descr->skb) { |
4cb6f9e5 | 397 | pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, |
11f1a52b | 398 | SPIDER_NET_MAX_FRAME, |
348bc2a6 | 399 | PCI_DMA_BIDIRECTIONAL); |
d9c199ee LV |
400 | dev_kfree_skb(descr->skb); |
401 | descr->skb = NULL; | |
aaec0fab JO |
402 | } |
403 | descr = descr->next; | |
64751910 | 404 | } while (descr != card->rx_chain.head); |
aaec0fab JO |
405 | } |
406 | ||
407 | /** | |
a4182c50 | 408 | * spider_net_prepare_rx_descr - Reinitialize RX descriptor |
aaec0fab JO |
409 | * @card: card structure |
410 | * @descr: descriptor to re-init | |
411 | * | |
a4182c50 | 412 | * Return 0 on succes, <0 on failure. |
aaec0fab | 413 | * |
a4182c50 LV |
414 | * Allocates a new rx skb, iommu-maps it and attaches it to the |
415 | * descriptor. Mark the descriptor as activated, ready-to-use. | |
aaec0fab JO |
416 | */ |
417 | static int | |
418 | spider_net_prepare_rx_descr(struct spider_net_card *card, | |
419 | struct spider_net_descr *descr) | |
420 | { | |
4cb6f9e5 | 421 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
8e0a613b | 422 | dma_addr_t buf; |
aaec0fab JO |
423 | int offset; |
424 | int bufsize; | |
425 | ||
426 | /* we need to round up the buffer size to a multiple of 128 */ | |
11f1a52b | 427 | bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & |
aaec0fab JO |
428 | (~(SPIDER_NET_RXBUF_ALIGN - 1)); |
429 | ||
430 | /* and we need to have it 128 byte aligned, therefore we allocate a | |
431 | * bit more */ | |
432 | /* allocate an skb */ | |
98739407 CH |
433 | descr->skb = netdev_alloc_skb(card->netdev, |
434 | bufsize + SPIDER_NET_RXBUF_ALIGN - 1); | |
aaec0fab | 435 | if (!descr->skb) { |
11f1a52b AB |
436 | if (netif_msg_rx_err(card) && net_ratelimit()) |
437 | pr_err("Not enough memory to allocate rx buffer\n"); | |
9b6b0b81 | 438 | card->spider_stats.alloc_rx_skb_error++; |
aaec0fab JO |
439 | return -ENOMEM; |
440 | } | |
4cb6f9e5 LV |
441 | hwdescr->buf_size = bufsize; |
442 | hwdescr->result_size = 0; | |
443 | hwdescr->valid_size = 0; | |
444 | hwdescr->data_status = 0; | |
445 | hwdescr->data_error = 0; | |
aaec0fab JO |
446 | |
447 | offset = ((unsigned long)descr->skb->data) & | |
448 | (SPIDER_NET_RXBUF_ALIGN - 1); | |
449 | if (offset) | |
450 | skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); | |
a4182c50 | 451 | /* iommu-map the skb */ |
8e0a613b | 452 | buf = pci_map_single(card->pdev, descr->skb->data, |
bdd01503 | 453 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
d4b0a4c1 | 454 | if (pci_dma_mapping_error(buf)) { |
aaec0fab | 455 | dev_kfree_skb_any(descr->skb); |
d9c199ee | 456 | descr->skb = NULL; |
11f1a52b | 457 | if (netif_msg_rx_err(card) && net_ratelimit()) |
aaec0fab | 458 | pr_err("Could not iommu-map rx buffer\n"); |
9b6b0b81 | 459 | card->spider_stats.rx_iommu_map_error++; |
4cb6f9e5 | 460 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
aaec0fab | 461 | } else { |
4cb6f9e5 LV |
462 | hwdescr->buf_addr = buf; |
463 | hwdescr->next_descr_addr = 0; | |
90476a20 | 464 | wmb(); |
4cb6f9e5 | 465 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | |
bdd01503 | 466 | SPIDER_NET_DMAC_NOINTR_COMPLETE; |
d9a9720e LV |
467 | |
468 | wmb(); | |
4cb6f9e5 | 469 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; |
aaec0fab JO |
470 | } |
471 | ||
a4182c50 | 472 | return 0; |
aaec0fab JO |
473 | } |
474 | ||
475 | /** | |
11f1a52b | 476 | * spider_net_enable_rxchtails - sets RX dmac chain tail addresses |
aaec0fab JO |
477 | * @card: card structure |
478 | * | |
11f1a52b | 479 | * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the |
aaec0fab JO |
480 | * chip by writing to the appropriate register. DMA is enabled in |
481 | * spider_net_enable_rxdmac. | |
482 | */ | |
bdd01503 | 483 | static inline void |
aaec0fab JO |
484 | spider_net_enable_rxchtails(struct spider_net_card *card) |
485 | { | |
486 | /* assume chain is aligned correctly */ | |
487 | spider_net_write_reg(card, SPIDER_NET_GDADCHA , | |
488 | card->rx_chain.tail->bus_addr); | |
489 | } | |
490 | ||
491 | /** | |
492 | * spider_net_enable_rxdmac - enables a receive DMA controller | |
493 | * @card: card structure | |
494 | * | |
495 | * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN | |
496 | * in the GDADMACCNTR register | |
497 | */ | |
bdd01503 | 498 | static inline void |
aaec0fab JO |
499 | spider_net_enable_rxdmac(struct spider_net_card *card) |
500 | { | |
11f1a52b | 501 | wmb(); |
aaec0fab JO |
502 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, |
503 | SPIDER_NET_DMA_RX_VALUE); | |
504 | } | |
505 | ||
506 | /** | |
507 | * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains | |
508 | * @card: card structure | |
509 | * | |
11f1a52b | 510 | * refills descriptors in the rx chain: allocates skbs and iommu-maps them. |
aaec0fab JO |
511 | */ |
512 | static void | |
513 | spider_net_refill_rx_chain(struct spider_net_card *card) | |
514 | { | |
bdd01503 JO |
515 | struct spider_net_descr_chain *chain = &card->rx_chain; |
516 | unsigned long flags; | |
aaec0fab | 517 | |
11f1a52b AB |
518 | /* one context doing the refill (and a second context seeing that |
519 | * and omitting it) is ok. If called by NAPI, we'll be called again | |
520 | * as spider_net_decode_one_descr is called several times. If some | |
521 | * interrupt calls us, the NAPI is about to clean up anyway. */ | |
bdd01503 JO |
522 | if (!spin_trylock_irqsave(&chain->lock, flags)) |
523 | return; | |
524 | ||
4cb6f9e5 | 525 | while (spider_net_get_descr_status(chain->head->hwdescr) == |
bdd01503 JO |
526 | SPIDER_NET_DESCR_NOT_IN_USE) { |
527 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
528 | break; | |
529 | chain->head = chain->head->next; | |
530 | } | |
aaec0fab | 531 | |
bdd01503 | 532 | spin_unlock_irqrestore(&chain->lock, flags); |
aaec0fab JO |
533 | } |
534 | ||
535 | /** | |
2c307db7 | 536 | * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains |
aaec0fab JO |
537 | * @card: card structure |
538 | * | |
2c307db7 | 539 | * Returns 0 on success, <0 on failure. |
aaec0fab JO |
540 | */ |
541 | static int | |
542 | spider_net_alloc_rx_skbs(struct spider_net_card *card) | |
543 | { | |
544 | int result; | |
545 | struct spider_net_descr_chain *chain; | |
546 | ||
547 | result = -ENOMEM; | |
548 | ||
549 | chain = &card->rx_chain; | |
2c307db7 LV |
550 | /* Put at least one buffer into the chain. if this fails, |
551 | * we've got a problem. If not, spider_net_refill_rx_chain | |
552 | * will do the rest at the end of this function. */ | |
aaec0fab JO |
553 | if (spider_net_prepare_rx_descr(card, chain->head)) |
554 | goto error; | |
555 | else | |
556 | chain->head = chain->head->next; | |
557 | ||
2c307db7 LV |
558 | /* This will allocate the rest of the rx buffers; |
559 | * if not, it's business as usual later on. */ | |
aaec0fab | 560 | spider_net_refill_rx_chain(card); |
11f1a52b | 561 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
562 | return 0; |
563 | ||
564 | error: | |
565 | spider_net_free_rx_chain_contents(card); | |
566 | return result; | |
567 | } | |
568 | ||
aaec0fab JO |
569 | /** |
570 | * spider_net_get_multicast_hash - generates hash for multicast filter table | |
571 | * @addr: multicast address | |
572 | * | |
573 | * returns the hash value. | |
574 | * | |
575 | * spider_net_get_multicast_hash calculates a hash value for a given multicast | |
576 | * address, that is used to set the multicast filter tables | |
577 | */ | |
578 | static u8 | |
579 | spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) | |
580 | { | |
aaec0fab JO |
581 | u32 crc; |
582 | u8 hash; | |
11f1a52b AB |
583 | char addr_for_crc[ETH_ALEN] = { 0, }; |
584 | int i, bit; | |
585 | ||
586 | for (i = 0; i < ETH_ALEN * 8; i++) { | |
587 | bit = (addr[i / 8] >> (i % 8)) & 1; | |
588 | addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); | |
589 | } | |
aaec0fab | 590 | |
11f1a52b | 591 | crc = crc32_be(~0, addr_for_crc, netdev->addr_len); |
aaec0fab JO |
592 | |
593 | hash = (crc >> 27); | |
594 | hash <<= 3; | |
595 | hash |= crc & 7; | |
11f1a52b | 596 | hash &= 0xff; |
aaec0fab JO |
597 | |
598 | return hash; | |
599 | } | |
600 | ||
601 | /** | |
602 | * spider_net_set_multi - sets multicast addresses and promisc flags | |
603 | * @netdev: interface device structure | |
604 | * | |
605 | * spider_net_set_multi configures multicast addresses as needed for the | |
606 | * netdev interface. It also sets up multicast, allmulti and promisc | |
607 | * flags appropriately | |
608 | */ | |
609 | static void | |
610 | spider_net_set_multi(struct net_device *netdev) | |
611 | { | |
612 | struct dev_mc_list *mc; | |
613 | u8 hash; | |
614 | int i; | |
615 | u32 reg; | |
616 | struct spider_net_card *card = netdev_priv(netdev); | |
617 | unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = | |
618 | {0, }; | |
619 | ||
620 | spider_net_set_promisc(card); | |
621 | ||
622 | if (netdev->flags & IFF_ALLMULTI) { | |
623 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { | |
624 | set_bit(i, bitmask); | |
625 | } | |
626 | goto write_hash; | |
627 | } | |
628 | ||
629 | /* well, we know, what the broadcast hash value is: it's xfd | |
630 | hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ | |
631 | set_bit(0xfd, bitmask); | |
632 | ||
633 | for (mc = netdev->mc_list; mc; mc = mc->next) { | |
634 | hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr); | |
635 | set_bit(hash, bitmask); | |
636 | } | |
637 | ||
638 | write_hash: | |
639 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { | |
640 | reg = 0; | |
641 | if (test_bit(i * 4, bitmask)) | |
642 | reg += 0x08; | |
643 | reg <<= 8; | |
644 | if (test_bit(i * 4 + 1, bitmask)) | |
645 | reg += 0x08; | |
646 | reg <<= 8; | |
647 | if (test_bit(i * 4 + 2, bitmask)) | |
648 | reg += 0x08; | |
649 | reg <<= 8; | |
650 | if (test_bit(i * 4 + 3, bitmask)) | |
651 | reg += 0x08; | |
652 | ||
653 | spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); | |
654 | } | |
655 | } | |
656 | ||
657 | /** | |
658 | * spider_net_disable_rxdmac - disables the receive DMA controller | |
659 | * @card: card structure | |
660 | * | |
661 | * spider_net_disable_rxdmac terminates processing on the DMA controller by | |
662 | * turing off DMA and issueing a force end | |
663 | */ | |
664 | static void | |
665 | spider_net_disable_rxdmac(struct spider_net_card *card) | |
666 | { | |
667 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
668 | SPIDER_NET_DMA_RX_FEND_VALUE); | |
669 | } | |
670 | ||
aaec0fab JO |
671 | /** |
672 | * spider_net_prepare_tx_descr - fill tx descriptor with skb data | |
673 | * @card: card structure | |
674 | * @descr: descriptor structure to fill out | |
675 | * @skb: packet to use | |
676 | * | |
677 | * returns 0 on success, <0 on failure. | |
678 | * | |
679 | * fills out the descriptor structure with skb data and len. Copies data, | |
680 | * if needed (32bit DMA!) | |
681 | */ | |
682 | static int | |
683 | spider_net_prepare_tx_descr(struct spider_net_card *card, | |
aaec0fab JO |
684 | struct sk_buff *skb) |
685 | { | |
d9c199ee | 686 | struct spider_net_descr_chain *chain = &card->tx_chain; |
9cc7bf7e | 687 | struct spider_net_descr *descr; |
4cb6f9e5 | 688 | struct spider_net_hw_descr *hwdescr; |
11f1a52b | 689 | dma_addr_t buf; |
9cc7bf7e | 690 | unsigned long flags; |
11f1a52b | 691 | |
9c434f5e | 692 | buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); |
d4b0a4c1 | 693 | if (pci_dma_mapping_error(buf)) { |
11f1a52b | 694 | if (netif_msg_tx_err(card) && net_ratelimit()) |
aaec0fab | 695 | pr_err("could not iommu-map packet (%p, %i). " |
9c434f5e | 696 | "Dropping packet\n", skb->data, skb->len); |
9b6b0b81 | 697 | card->spider_stats.tx_iommu_map_error++; |
aaec0fab JO |
698 | return -ENOMEM; |
699 | } | |
700 | ||
d9c199ee | 701 | spin_lock_irqsave(&chain->lock, flags); |
9cc7bf7e | 702 | descr = card->tx_chain.head; |
d9c199ee LV |
703 | if (descr->next == chain->tail->prev) { |
704 | spin_unlock_irqrestore(&chain->lock, flags); | |
705 | pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); | |
706 | return -ENOMEM; | |
707 | } | |
4cb6f9e5 | 708 | hwdescr = descr->hwdescr; |
d9c199ee | 709 | chain->head = descr->next; |
9cc7bf7e | 710 | |
aaec0fab | 711 | descr->skb = skb; |
4cb6f9e5 LV |
712 | hwdescr->buf_addr = buf; |
713 | hwdescr->buf_size = skb->len; | |
714 | hwdescr->next_descr_addr = 0; | |
715 | hwdescr->data_status = 0; | |
aaec0fab | 716 | |
4cb6f9e5 | 717 | hwdescr->dmac_cmd_status = |
bdd01503 | 718 | SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS; |
d9c199ee | 719 | spin_unlock_irqrestore(&chain->lock, flags); |
9cc7bf7e | 720 | |
33bdeec8 | 721 | if (skb->protocol == htons(ETH_P_IP) && skb->ip_summed == CHECKSUM_PARTIAL) |
eddc9ec5 | 722 | switch (ip_hdr(skb)->protocol) { |
bdd01503 | 723 | case IPPROTO_TCP: |
4cb6f9e5 | 724 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; |
bdd01503 JO |
725 | break; |
726 | case IPPROTO_UDP: | |
4cb6f9e5 | 727 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; |
bdd01503 JO |
728 | break; |
729 | } | |
730 | ||
204e5fa1 | 731 | /* Chain the bus address, so that the DMA engine finds this descr. */ |
4cb6f9e5 LV |
732 | wmb(); |
733 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; | |
bdd01503 | 734 | |
917a5b8e | 735 | card->netdev->trans_start = jiffies; /* set netdev watchdog timer */ |
bdd01503 JO |
736 | return 0; |
737 | } | |
738 | ||
a664ccf4 | 739 | static int |
204e5fa1 LV |
740 | spider_net_set_low_watermark(struct spider_net_card *card) |
741 | { | |
4cb6f9e5 LV |
742 | struct spider_net_descr *descr = card->tx_chain.tail; |
743 | struct spider_net_hw_descr *hwdescr; | |
9cc7bf7e | 744 | unsigned long flags; |
204e5fa1 LV |
745 | int status; |
746 | int cnt=0; | |
747 | int i; | |
204e5fa1 | 748 | |
9cc7bf7e LV |
749 | /* Measure the length of the queue. Measurement does not |
750 | * need to be precise -- does not need a lock. */ | |
204e5fa1 | 751 | while (descr != card->tx_chain.head) { |
4cb6f9e5 | 752 | status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; |
204e5fa1 LV |
753 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) |
754 | break; | |
755 | descr = descr->next; | |
756 | cnt++; | |
757 | } | |
758 | ||
759 | /* If TX queue is short, don't even bother with interrupts */ | |
d4ed8f8d | 760 | if (cnt < card->tx_chain.num_desc/4) |
a664ccf4 | 761 | return cnt; |
204e5fa1 LV |
762 | |
763 | /* Set low-watermark 3/4th's of the way into the queue. */ | |
764 | descr = card->tx_chain.tail; | |
765 | cnt = (cnt*3)/4; | |
766 | for (i=0;i<cnt; i++) | |
767 | descr = descr->next; | |
768 | ||
769 | /* Set the new watermark, clear the old watermark */ | |
9cc7bf7e | 770 | spin_lock_irqsave(&card->tx_chain.lock, flags); |
4cb6f9e5 LV |
771 | descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; |
772 | if (card->low_watermark && card->low_watermark != descr) { | |
773 | hwdescr = card->low_watermark->hwdescr; | |
774 | hwdescr->dmac_cmd_status = | |
775 | hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; | |
776 | } | |
204e5fa1 | 777 | card->low_watermark = descr; |
9cc7bf7e | 778 | spin_unlock_irqrestore(&card->tx_chain.lock, flags); |
a664ccf4 | 779 | return cnt; |
204e5fa1 LV |
780 | } |
781 | ||
bdd01503 JO |
782 | /** |
783 | * spider_net_release_tx_chain - processes sent tx descriptors | |
784 | * @card: adapter structure | |
785 | * @brutal: if set, don't care about whether descriptor seems to be in use | |
786 | * | |
787 | * returns 0 if the tx ring is empty, otherwise 1. | |
788 | * | |
789 | * spider_net_release_tx_chain releases the tx descriptors that spider has | |
790 | * finished with (if non-brutal) or simply release tx descriptors (if brutal). | |
791 | * If some other context is calling this function, we return 1 so that we're | |
792 | * scheduled again (if we were scheduled) and will not loose initiative. | |
793 | */ | |
794 | static int | |
795 | spider_net_release_tx_chain(struct spider_net_card *card, int brutal) | |
796 | { | |
797 | struct spider_net_descr_chain *chain = &card->tx_chain; | |
9cc7bf7e | 798 | struct spider_net_descr *descr; |
4cb6f9e5 | 799 | struct spider_net_hw_descr *hwdescr; |
9cc7bf7e LV |
800 | struct sk_buff *skb; |
801 | u32 buf_addr; | |
802 | unsigned long flags; | |
bdd01503 JO |
803 | int status; |
804 | ||
5c8e98fe | 805 | while (1) { |
9cc7bf7e | 806 | spin_lock_irqsave(&chain->lock, flags); |
5c8e98fe LV |
807 | if (chain->tail == chain->head) { |
808 | spin_unlock_irqrestore(&chain->lock, flags); | |
809 | return 0; | |
810 | } | |
9cc7bf7e | 811 | descr = chain->tail; |
4cb6f9e5 | 812 | hwdescr = descr->hwdescr; |
9cc7bf7e | 813 | |
4cb6f9e5 | 814 | status = spider_net_get_descr_status(hwdescr); |
bdd01503 JO |
815 | switch (status) { |
816 | case SPIDER_NET_DESCR_COMPLETE: | |
817 | card->netdev_stats.tx_packets++; | |
9cc7bf7e | 818 | card->netdev_stats.tx_bytes += descr->skb->len; |
bdd01503 JO |
819 | break; |
820 | ||
821 | case SPIDER_NET_DESCR_CARDOWNED: | |
9cc7bf7e LV |
822 | if (!brutal) { |
823 | spin_unlock_irqrestore(&chain->lock, flags); | |
bdd01503 | 824 | return 1; |
9cc7bf7e LV |
825 | } |
826 | ||
bdd01503 JO |
827 | /* fallthrough, if we release the descriptors |
828 | * brutally (then we don't care about | |
829 | * SPIDER_NET_DESCR_CARDOWNED) */ | |
830 | ||
831 | case SPIDER_NET_DESCR_RESPONSE_ERROR: | |
832 | case SPIDER_NET_DESCR_PROTECTION_ERROR: | |
833 | case SPIDER_NET_DESCR_FORCE_END: | |
834 | if (netif_msg_tx_err(card)) | |
835 | pr_err("%s: forcing end of tx descriptor " | |
836 | "with status x%02x\n", | |
837 | card->netdev->name, status); | |
838 | card->netdev_stats.tx_errors++; | |
839 | break; | |
840 | ||
841 | default: | |
842 | card->netdev_stats.tx_dropped++; | |
9cc7bf7e LV |
843 | if (!brutal) { |
844 | spin_unlock_irqrestore(&chain->lock, flags); | |
c3fee4c5 | 845 | return 1; |
9cc7bf7e | 846 | } |
bdd01503 | 847 | } |
aaec0fab | 848 | |
9cc7bf7e | 849 | chain->tail = descr->next; |
4cb6f9e5 | 850 | hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; |
9cc7bf7e | 851 | skb = descr->skb; |
d9c199ee | 852 | descr->skb = NULL; |
4cb6f9e5 | 853 | buf_addr = hwdescr->buf_addr; |
9cc7bf7e LV |
854 | spin_unlock_irqrestore(&chain->lock, flags); |
855 | ||
856 | /* unmap the skb */ | |
857 | if (skb) { | |
9c434f5e JL |
858 | pci_unmap_single(card->pdev, buf_addr, skb->len, |
859 | PCI_DMA_TODEVICE); | |
9cc7bf7e LV |
860 | dev_kfree_skb(skb); |
861 | } | |
862 | } | |
aaec0fab JO |
863 | return 0; |
864 | } | |
865 | ||
866 | /** | |
867 | * spider_net_kick_tx_dma - enables TX DMA processing | |
868 | * @card: card structure | |
869 | * @descr: descriptor address to enable TX processing at | |
870 | * | |
a664ccf4 LV |
871 | * This routine will start the transmit DMA running if |
872 | * it is not already running. This routine ned only be | |
873 | * called when queueing a new packet to an empty tx queue. | |
874 | * Writes the current tx chain head as start address | |
875 | * of the tx descriptor chain and enables the transmission | |
876 | * DMA engine. | |
aaec0fab | 877 | */ |
bdd01503 JO |
878 | static inline void |
879 | spider_net_kick_tx_dma(struct spider_net_card *card) | |
aaec0fab | 880 | { |
bdd01503 | 881 | struct spider_net_descr *descr; |
aaec0fab | 882 | |
bdd01503 JO |
883 | if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & |
884 | SPIDER_NET_TX_DMA_EN) | |
885 | goto out; | |
aaec0fab | 886 | |
bdd01503 JO |
887 | descr = card->tx_chain.tail; |
888 | for (;;) { | |
4cb6f9e5 | 889 | if (spider_net_get_descr_status(descr->hwdescr) == |
bdd01503 JO |
890 | SPIDER_NET_DESCR_CARDOWNED) { |
891 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
892 | descr->bus_addr); | |
893 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
894 | SPIDER_NET_DMA_TX_VALUE); | |
895 | break; | |
896 | } | |
897 | if (descr == card->tx_chain.head) | |
898 | break; | |
899 | descr = descr->next; | |
900 | } | |
901 | ||
902 | out: | |
903 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); | |
aaec0fab JO |
904 | } |
905 | ||
906 | /** | |
907 | * spider_net_xmit - transmits a frame over the device | |
908 | * @skb: packet to send out | |
909 | * @netdev: interface device structure | |
910 | * | |
bdd01503 | 911 | * returns 0 on success, !0 on failure |
aaec0fab JO |
912 | */ |
913 | static int | |
914 | spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) | |
915 | { | |
a664ccf4 | 916 | int cnt; |
aaec0fab | 917 | struct spider_net_card *card = netdev_priv(netdev); |
bdd01503 | 918 | |
11f1a52b | 919 | spider_net_release_tx_chain(card, 0); |
aaec0fab | 920 | |
d9c199ee | 921 | if (spider_net_prepare_tx_descr(card, skb) != 0) { |
9b6b0b81 | 922 | card->netdev_stats.tx_dropped++; |
313ef4b7 LV |
923 | netif_stop_queue(netdev); |
924 | return NETDEV_TX_BUSY; | |
bdd01503 | 925 | } |
aaec0fab | 926 | |
a664ccf4 LV |
927 | cnt = spider_net_set_low_watermark(card); |
928 | if (cnt < 5) | |
929 | spider_net_kick_tx_dma(card); | |
313ef4b7 | 930 | return NETDEV_TX_OK; |
bdd01503 | 931 | } |
11f1a52b | 932 | |
bdd01503 JO |
933 | /** |
934 | * spider_net_cleanup_tx_ring - cleans up the TX ring | |
935 | * @card: card structure | |
936 | * | |
68a8c609 LV |
937 | * spider_net_cleanup_tx_ring is called by either the tx_timer |
938 | * or from the NAPI polling routine. | |
939 | * This routine releases resources associted with transmitted | |
940 | * packets, including updating the queue tail pointer. | |
bdd01503 JO |
941 | */ |
942 | static void | |
943 | spider_net_cleanup_tx_ring(struct spider_net_card *card) | |
944 | { | |
bdd01503 | 945 | if ((spider_net_release_tx_chain(card, 0) != 0) && |
313ef4b7 | 946 | (card->netdev->flags & IFF_UP)) { |
bdd01503 | 947 | spider_net_kick_tx_dma(card); |
313ef4b7 LV |
948 | netif_wake_queue(card->netdev); |
949 | } | |
aaec0fab JO |
950 | } |
951 | ||
952 | /** | |
953 | * spider_net_do_ioctl - called for device ioctls | |
954 | * @netdev: interface device structure | |
955 | * @ifr: request parameter structure for ioctl | |
956 | * @cmd: command code for ioctl | |
957 | * | |
958 | * returns 0 on success, <0 on failure. Currently, we have no special ioctls. | |
959 | * -EOPNOTSUPP is returned, if an unknown ioctl was requested | |
960 | */ | |
961 | static int | |
962 | spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
963 | { | |
964 | switch (cmd) { | |
965 | default: | |
966 | return -EOPNOTSUPP; | |
967 | } | |
968 | } | |
969 | ||
970 | /** | |
971 | * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on | |
972 | * @descr: descriptor to process | |
973 | * @card: card structure | |
974 | * | |
05b346b5 LV |
975 | * Fills out skb structure and passes the data to the stack. |
976 | * The descriptor state is not changed. | |
aaec0fab | 977 | */ |
7f7223b8 | 978 | static void |
aaec0fab | 979 | spider_net_pass_skb_up(struct spider_net_descr *descr, |
1cd173f6 | 980 | struct spider_net_card *card) |
aaec0fab | 981 | { |
4cb6f9e5 | 982 | struct spider_net_hw_descr *hwdescr= descr->hwdescr; |
aaec0fab JO |
983 | struct sk_buff *skb; |
984 | struct net_device *netdev; | |
985 | u32 data_status, data_error; | |
986 | ||
4cb6f9e5 LV |
987 | data_status = hwdescr->data_status; |
988 | data_error = hwdescr->data_error; | |
aaec0fab JO |
989 | netdev = card->netdev; |
990 | ||
11f1a52b | 991 | skb = descr->skb; |
4cb6f9e5 | 992 | skb_put(skb, hwdescr->valid_size); |
aaec0fab JO |
993 | |
994 | /* the card seems to add 2 bytes of junk in front | |
995 | * of the ethernet frame */ | |
996 | #define SPIDER_MISALIGN 2 | |
997 | skb_pull(skb, SPIDER_MISALIGN); | |
998 | skb->protocol = eth_type_trans(skb, netdev); | |
999 | ||
1000 | /* checksum offload */ | |
1001 | if (card->options.rx_csum) { | |
11f1a52b AB |
1002 | if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == |
1003 | SPIDER_NET_DATA_STATUS_CKSUM_MASK) && | |
1004 | !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) | |
aaec0fab JO |
1005 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1006 | else | |
1007 | skb->ip_summed = CHECKSUM_NONE; | |
11f1a52b | 1008 | } else |
aaec0fab | 1009 | skb->ip_summed = CHECKSUM_NONE; |
aaec0fab JO |
1010 | |
1011 | if (data_status & SPIDER_NET_VLAN_PACKET) { | |
1012 | /* further enhancements: HW-accel VLAN | |
1013 | * vlan_hwaccel_receive_skb | |
1014 | */ | |
1015 | } | |
1016 | ||
aaec0fab JO |
1017 | /* update netdevice statistics */ |
1018 | card->netdev_stats.rx_packets++; | |
1019 | card->netdev_stats.rx_bytes += skb->len; | |
93c1d3b7 FM |
1020 | |
1021 | /* pass skb up to stack */ | |
1022 | netif_receive_skb(skb); | |
aaec0fab JO |
1023 | } |
1024 | ||
6d24998f LV |
1025 | #ifdef DEBUG |
1026 | static void show_rx_chain(struct spider_net_card *card) | |
1027 | { | |
1028 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1029 | struct spider_net_descr *start= chain->tail; | |
1030 | struct spider_net_descr *descr= start; | |
1031 | int status; | |
1032 | ||
1033 | int cnt = 0; | |
1034 | int cstat = spider_net_get_descr_status(descr); | |
1035 | printk(KERN_INFO "RX chain tail at descr=%ld\n", | |
1036 | (start - card->descr) - card->tx_chain.num_desc); | |
1037 | status = cstat; | |
1038 | do | |
1039 | { | |
1040 | status = spider_net_get_descr_status(descr); | |
1041 | if (cstat != status) { | |
1042 | printk(KERN_INFO "Have %d descrs with stat=x%08x\n", cnt, cstat); | |
1043 | cstat = status; | |
1044 | cnt = 0; | |
1045 | } | |
1046 | cnt ++; | |
1047 | descr = descr->next; | |
1048 | } while (descr != start); | |
1049 | printk(KERN_INFO "Last %d descrs with stat=x%08x\n", cnt, cstat); | |
1050 | } | |
1051 | #endif | |
1052 | ||
aaec0fab | 1053 | /** |
7376e732 | 1054 | * spider_net_decode_one_descr - processes an RX descriptor |
aaec0fab JO |
1055 | * @card: card structure |
1056 | * | |
7376e732 | 1057 | * Returns 1 if a packet has been sent to the stack, otherwise 0. |
aaec0fab | 1058 | * |
7376e732 LV |
1059 | * Processes an RX descriptor by iommu-unmapping the data buffer |
1060 | * and passing the packet up to the stack. This function is called | |
1061 | * in softirq context, e.g. either bottom half from interrupt or | |
1062 | * NAPI polling context. | |
aaec0fab JO |
1063 | */ |
1064 | static int | |
1cd173f6 | 1065 | spider_net_decode_one_descr(struct spider_net_card *card) |
aaec0fab | 1066 | { |
bdd01503 JO |
1067 | struct spider_net_descr_chain *chain = &card->rx_chain; |
1068 | struct spider_net_descr *descr = chain->tail; | |
4cb6f9e5 | 1069 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
bdd01503 | 1070 | int status; |
aaec0fab | 1071 | |
4cb6f9e5 | 1072 | status = spider_net_get_descr_status(hwdescr); |
aaec0fab | 1073 | |
80dab7c7 LV |
1074 | /* Nothing in the descriptor, or ring must be empty */ |
1075 | if ((status == SPIDER_NET_DESCR_CARDOWNED) || | |
1076 | (status == SPIDER_NET_DESCR_NOT_IN_USE)) | |
1cd173f6 | 1077 | return 0; |
aaec0fab | 1078 | |
11f1a52b | 1079 | /* descriptor definitively used -- move on tail */ |
aaec0fab JO |
1080 | chain->tail = descr->next; |
1081 | ||
05b346b5 | 1082 | /* unmap descriptor */ |
4cb6f9e5 | 1083 | pci_unmap_single(card->pdev, hwdescr->buf_addr, |
05b346b5 LV |
1084 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
1085 | ||
aaec0fab JO |
1086 | if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || |
1087 | (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || | |
1088 | (status == SPIDER_NET_DESCR_FORCE_END) ) { | |
1089 | if (netif_msg_rx_err(card)) | |
1090 | pr_err("%s: dropping RX descriptor with state %d\n", | |
1091 | card->netdev->name, status); | |
1092 | card->netdev_stats.rx_dropped++; | |
7f7223b8 | 1093 | goto bad_desc; |
aaec0fab JO |
1094 | } |
1095 | ||
1096 | if ( (status != SPIDER_NET_DESCR_COMPLETE) && | |
1097 | (status != SPIDER_NET_DESCR_FRAME_END) ) { | |
5a028877 | 1098 | if (netif_msg_rx_err(card)) |
7376e732 | 1099 | pr_err("%s: RX descriptor with unknown state %d\n", |
aaec0fab | 1100 | card->netdev->name, status); |
5a028877 | 1101 | card->spider_stats.rx_desc_unk_state++; |
7f7223b8 | 1102 | goto bad_desc; |
aaec0fab JO |
1103 | } |
1104 | ||
366684bd | 1105 | /* The cases we'll throw away the packet immediately */ |
4cb6f9e5 | 1106 | if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) { |
366684bd LV |
1107 | if (netif_msg_rx_err(card)) |
1108 | pr_err("%s: error in received descriptor found, " | |
1109 | "data_status=x%08x, data_error=x%08x\n", | |
1110 | card->netdev->name, | |
4cb6f9e5 | 1111 | hwdescr->data_status, hwdescr->data_error); |
7f7223b8 | 1112 | goto bad_desc; |
366684bd LV |
1113 | } |
1114 | ||
4cb6f9e5 | 1115 | if (hwdescr->dmac_cmd_status & 0xfefe) { |
6d24998f LV |
1116 | pr_err("%s: bad status, cmd_status=x%08x\n", |
1117 | card->netdev->name, | |
4cb6f9e5 LV |
1118 | hwdescr->dmac_cmd_status); |
1119 | pr_err("buf_addr=x%08x\n", hwdescr->buf_addr); | |
1120 | pr_err("buf_size=x%08x\n", hwdescr->buf_size); | |
1121 | pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); | |
1122 | pr_err("result_size=x%08x\n", hwdescr->result_size); | |
1123 | pr_err("valid_size=x%08x\n", hwdescr->valid_size); | |
1124 | pr_err("data_status=x%08x\n", hwdescr->data_status); | |
1125 | pr_err("data_error=x%08x\n", hwdescr->data_error); | |
6d24998f LV |
1126 | pr_err("which=%ld\n", descr - card->rx_chain.ring); |
1127 | ||
1128 | card->spider_stats.rx_desc_error++; | |
1129 | goto bad_desc; | |
1130 | } | |
1131 | ||
7f7223b8 LV |
1132 | /* Ok, we've got a packet in descr */ |
1133 | spider_net_pass_skb_up(descr, card); | |
83d35145 | 1134 | descr->skb = NULL; |
4cb6f9e5 | 1135 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
7f7223b8 LV |
1136 | return 1; |
1137 | ||
1138 | bad_desc: | |
1139 | dev_kfree_skb_irq(descr->skb); | |
d9c199ee | 1140 | descr->skb = NULL; |
4cb6f9e5 | 1141 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
7f7223b8 | 1142 | return 0; |
aaec0fab JO |
1143 | } |
1144 | ||
1145 | /** | |
1146 | * spider_net_poll - NAPI poll function called by the stack to return packets | |
1147 | * @netdev: interface device structure | |
1148 | * @budget: number of packets we can pass to the stack at most | |
1149 | * | |
1150 | * returns 0 if no more packets available to the driver/stack. Returns 1, | |
1151 | * if the quota is exceeded, but the driver has still packets. | |
1152 | * | |
1153 | * spider_net_poll returns all packets from the rx descriptors to the stack | |
1154 | * (using netif_receive_skb). If all/enough packets are up, the driver | |
1155 | * reenables interrupts and returns 0. If not, 1 is returned. | |
1156 | */ | |
1157 | static int | |
1158 | spider_net_poll(struct net_device *netdev, int *budget) | |
1159 | { | |
1160 | struct spider_net_card *card = netdev_priv(netdev); | |
1161 | int packets_to_do, packets_done = 0; | |
1162 | int no_more_packets = 0; | |
1163 | ||
68a8c609 | 1164 | spider_net_cleanup_tx_ring(card); |
aaec0fab JO |
1165 | packets_to_do = min(*budget, netdev->quota); |
1166 | ||
1167 | while (packets_to_do) { | |
1cd173f6 | 1168 | if (spider_net_decode_one_descr(card)) { |
aaec0fab JO |
1169 | packets_done++; |
1170 | packets_to_do--; | |
1171 | } else { | |
1172 | /* no more packets for the stack */ | |
1173 | no_more_packets = 1; | |
1174 | break; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | netdev->quota -= packets_done; | |
1179 | *budget -= packets_done; | |
11f1a52b | 1180 | spider_net_refill_rx_chain(card); |
80dab7c7 | 1181 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
1182 | |
1183 | /* if all packets are in the stack, enable interrupts and return 0 */ | |
1184 | /* if not, return 1 */ | |
1185 | if (no_more_packets) { | |
1186 | netif_rx_complete(netdev); | |
1187 | spider_net_rx_irq_on(card); | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | return 1; | |
1192 | } | |
1193 | ||
aaec0fab JO |
1194 | /** |
1195 | * spider_net_get_stats - get interface statistics | |
1196 | * @netdev: interface device structure | |
1197 | * | |
1198 | * returns the interface statistics residing in the spider_net_card struct | |
1199 | */ | |
1200 | static struct net_device_stats * | |
1201 | spider_net_get_stats(struct net_device *netdev) | |
1202 | { | |
1203 | struct spider_net_card *card = netdev_priv(netdev); | |
1204 | struct net_device_stats *stats = &card->netdev_stats; | |
1205 | return stats; | |
1206 | } | |
1207 | ||
1208 | /** | |
1209 | * spider_net_change_mtu - changes the MTU of an interface | |
1210 | * @netdev: interface device structure | |
1211 | * @new_mtu: new MTU value | |
1212 | * | |
1213 | * returns 0 on success, <0 on failure | |
1214 | */ | |
1215 | static int | |
1216 | spider_net_change_mtu(struct net_device *netdev, int new_mtu) | |
1217 | { | |
1218 | /* no need to re-alloc skbs or so -- the max mtu is about 2.3k | |
1219 | * and mtu is outbound only anyway */ | |
1220 | if ( (new_mtu < SPIDER_NET_MIN_MTU ) || | |
1221 | (new_mtu > SPIDER_NET_MAX_MTU) ) | |
1222 | return -EINVAL; | |
1223 | netdev->mtu = new_mtu; | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | /** | |
1228 | * spider_net_set_mac - sets the MAC of an interface | |
1229 | * @netdev: interface device structure | |
1230 | * @ptr: pointer to new MAC address | |
1231 | * | |
1232 | * Returns 0 on success, <0 on failure. Currently, we don't support this | |
1233 | * and will always return EOPNOTSUPP. | |
1234 | */ | |
1235 | static int | |
1236 | spider_net_set_mac(struct net_device *netdev, void *p) | |
1237 | { | |
1238 | struct spider_net_card *card = netdev_priv(netdev); | |
054034db | 1239 | u32 macl, macu, regvalue; |
aaec0fab JO |
1240 | struct sockaddr *addr = p; |
1241 | ||
aaec0fab JO |
1242 | if (!is_valid_ether_addr(addr->sa_data)) |
1243 | return -EADDRNOTAVAIL; | |
1244 | ||
054034db JO |
1245 | /* switch off GMACTPE and GMACRPE */ |
1246 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1247 | regvalue &= ~((1 << 5) | (1 << 6)); | |
1248 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1249 | ||
1250 | /* write mac */ | |
aaec0fab JO |
1251 | macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) + |
1252 | (addr->sa_data[2]<<8) + (addr->sa_data[3]); | |
1253 | macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]); | |
1254 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); | |
1255 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); | |
1256 | ||
054034db JO |
1257 | /* switch GMACTPE and GMACRPE back on */ |
1258 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1259 | regvalue |= ((1 << 5) | (1 << 6)); | |
1260 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1261 | ||
aaec0fab JO |
1262 | spider_net_set_promisc(card); |
1263 | ||
1264 | /* look up, whether we have been successful */ | |
1265 | if (spider_net_get_mac_address(netdev)) | |
1266 | return -EADDRNOTAVAIL; | |
1267 | if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len)) | |
1268 | return -EADDRNOTAVAIL; | |
1269 | ||
1270 | return 0; | |
1271 | } | |
1272 | ||
abdb66b5 KI |
1273 | /** |
1274 | * spider_net_link_reset | |
1275 | * @netdev: net device structure | |
1276 | * | |
1277 | * This is called when the PHY_LINK signal is asserted. For the blade this is | |
1278 | * not connected so we should never get here. | |
1279 | * | |
1280 | */ | |
1281 | static void | |
1282 | spider_net_link_reset(struct net_device *netdev) | |
1283 | { | |
1284 | ||
1285 | struct spider_net_card *card = netdev_priv(netdev); | |
1286 | ||
1287 | del_timer_sync(&card->aneg_timer); | |
1288 | ||
1289 | /* clear interrupt, block further interrupts */ | |
1290 | spider_net_write_reg(card, SPIDER_NET_GMACST, | |
1291 | spider_net_read_reg(card, SPIDER_NET_GMACST)); | |
1292 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); | |
1293 | ||
1294 | /* reset phy and setup aneg */ | |
1295 | spider_net_setup_aneg(card); | |
1296 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1297 | ||
1298 | } | |
1299 | ||
aaec0fab JO |
1300 | /** |
1301 | * spider_net_handle_error_irq - handles errors raised by an interrupt | |
1302 | * @card: card structure | |
1303 | * @status_reg: interrupt status register 0 (GHIINT0STS) | |
1304 | * | |
1305 | * spider_net_handle_error_irq treats or ignores all error conditions | |
1306 | * found when an interrupt is presented | |
1307 | */ | |
1308 | static void | |
1309 | spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg) | |
1310 | { | |
1311 | u32 error_reg1, error_reg2; | |
1312 | u32 i; | |
1313 | int show_error = 1; | |
1314 | ||
1315 | error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); | |
1316 | error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); | |
1317 | ||
1318 | /* check GHIINT0STS ************************************/ | |
1319 | if (status_reg) | |
1320 | for (i = 0; i < 32; i++) | |
1321 | if (status_reg & (1<<i)) | |
1322 | switch (i) | |
1323 | { | |
1324 | /* let error_reg1 and error_reg2 evaluation decide, what to do | |
1325 | case SPIDER_NET_PHYINT: | |
1326 | case SPIDER_NET_GMAC2INT: | |
1327 | case SPIDER_NET_GMAC1INT: | |
aaec0fab JO |
1328 | case SPIDER_NET_GFIFOINT: |
1329 | case SPIDER_NET_DMACINT: | |
1330 | case SPIDER_NET_GSYSINT: | |
1331 | break; */ | |
1332 | ||
98b9040c LV |
1333 | case SPIDER_NET_GIPSINT: |
1334 | show_error = 0; | |
1335 | break; | |
1336 | ||
aaec0fab JO |
1337 | case SPIDER_NET_GPWOPCMPINT: |
1338 | /* PHY write operation completed */ | |
1339 | show_error = 0; | |
1340 | break; | |
1341 | case SPIDER_NET_GPROPCMPINT: | |
1342 | /* PHY read operation completed */ | |
1343 | /* we don't use semaphores, as we poll for the completion | |
1344 | * of the read operation in spider_net_read_phy. Should take | |
1345 | * about 50 us */ | |
1346 | show_error = 0; | |
1347 | break; | |
1348 | case SPIDER_NET_GPWFFINT: | |
1349 | /* PHY command queue full */ | |
1350 | if (netif_msg_intr(card)) | |
1351 | pr_err("PHY write queue full\n"); | |
1352 | show_error = 0; | |
1353 | break; | |
1354 | ||
1355 | /* case SPIDER_NET_GRMDADRINT: not used. print a message */ | |
1356 | /* case SPIDER_NET_GRMARPINT: not used. print a message */ | |
1357 | /* case SPIDER_NET_GRMMPINT: not used. print a message */ | |
1358 | ||
1359 | case SPIDER_NET_GDTDEN0INT: | |
1360 | /* someone has set TX_DMA_EN to 0 */ | |
1361 | show_error = 0; | |
1362 | break; | |
1363 | ||
1364 | case SPIDER_NET_GDDDEN0INT: /* fallthrough */ | |
1365 | case SPIDER_NET_GDCDEN0INT: /* fallthrough */ | |
1366 | case SPIDER_NET_GDBDEN0INT: /* fallthrough */ | |
1367 | case SPIDER_NET_GDADEN0INT: | |
1368 | /* someone has set RX_DMA_EN to 0 */ | |
1369 | show_error = 0; | |
1370 | break; | |
1371 | ||
1372 | /* RX interrupts */ | |
1373 | case SPIDER_NET_GDDFDCINT: | |
1374 | case SPIDER_NET_GDCFDCINT: | |
1375 | case SPIDER_NET_GDBFDCINT: | |
1376 | case SPIDER_NET_GDAFDCINT: | |
1377 | /* case SPIDER_NET_GDNMINT: not used. print a message */ | |
1378 | /* case SPIDER_NET_GCNMINT: not used. print a message */ | |
1379 | /* case SPIDER_NET_GBNMINT: not used. print a message */ | |
1380 | /* case SPIDER_NET_GANMINT: not used. print a message */ | |
1381 | /* case SPIDER_NET_GRFNMINT: not used. print a message */ | |
1382 | show_error = 0; | |
1383 | break; | |
1384 | ||
1385 | /* TX interrupts */ | |
1386 | case SPIDER_NET_GDTFDCINT: | |
1387 | show_error = 0; | |
1388 | break; | |
1389 | case SPIDER_NET_GTTEDINT: | |
1390 | show_error = 0; | |
1391 | break; | |
1392 | case SPIDER_NET_GDTDCEINT: | |
1393 | /* chain end. If a descriptor should be sent, kick off | |
1394 | * tx dma | |
98b9040c | 1395 | if (card->tx_chain.tail != card->tx_chain.head) |
aaec0fab | 1396 | spider_net_kick_tx_dma(card); |
98b9040c LV |
1397 | */ |
1398 | show_error = 0; | |
aaec0fab JO |
1399 | break; |
1400 | ||
1401 | /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ | |
1402 | /* case SPIDER_NET_GFREECNTINT: not used. print a message */ | |
1403 | } | |
1404 | ||
1405 | /* check GHIINT1STS ************************************/ | |
1406 | if (error_reg1) | |
1407 | for (i = 0; i < 32; i++) | |
1408 | if (error_reg1 & (1<<i)) | |
1409 | switch (i) | |
1410 | { | |
1411 | case SPIDER_NET_GTMFLLINT: | |
fc8e13da IK |
1412 | /* TX RAM full may happen on a usual case. |
1413 | * Logging is not needed. */ | |
aaec0fab JO |
1414 | show_error = 0; |
1415 | break; | |
11f1a52b AB |
1416 | case SPIDER_NET_GRFDFLLINT: /* fallthrough */ |
1417 | case SPIDER_NET_GRFCFLLINT: /* fallthrough */ | |
1418 | case SPIDER_NET_GRFBFLLINT: /* fallthrough */ | |
1419 | case SPIDER_NET_GRFAFLLINT: /* fallthrough */ | |
aaec0fab | 1420 | case SPIDER_NET_GRMFLLINT: |
11f1a52b | 1421 | if (netif_msg_intr(card) && net_ratelimit()) |
5a028877 | 1422 | pr_err("Spider RX RAM full, incoming packets " |
11f1a52b AB |
1423 | "might be discarded!\n"); |
1424 | spider_net_rx_irq_off(card); | |
75856175 | 1425 | netif_rx_schedule(card->netdev); |
11f1a52b | 1426 | show_error = 0; |
aaec0fab JO |
1427 | break; |
1428 | ||
1429 | /* case SPIDER_NET_GTMSHTINT: problem, print a message */ | |
1430 | case SPIDER_NET_GDTINVDINT: | |
1431 | /* allrighty. tx from previous descr ok */ | |
1432 | show_error = 0; | |
1433 | break; | |
aaec0fab JO |
1434 | |
1435 | /* chain end */ | |
1436 | case SPIDER_NET_GDDDCEINT: /* fallthrough */ | |
1437 | case SPIDER_NET_GDCDCEINT: /* fallthrough */ | |
1438 | case SPIDER_NET_GDBDCEINT: /* fallthrough */ | |
1439 | case SPIDER_NET_GDADCEINT: | |
5a028877 | 1440 | if (netif_msg_intr(card) && net_ratelimit()) |
aaec0fab JO |
1441 | pr_err("got descriptor chain end interrupt, " |
1442 | "restarting DMAC %c.\n", | |
37aad750 | 1443 | 'D'-(i-SPIDER_NET_GDDDCEINT)/3); |
aaec0fab | 1444 | spider_net_refill_rx_chain(card); |
11f1a52b | 1445 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
1446 | show_error = 0; |
1447 | break; | |
1448 | ||
1449 | /* invalid descriptor */ | |
1450 | case SPIDER_NET_GDDINVDINT: /* fallthrough */ | |
1451 | case SPIDER_NET_GDCINVDINT: /* fallthrough */ | |
1452 | case SPIDER_NET_GDBINVDINT: /* fallthrough */ | |
1453 | case SPIDER_NET_GDAINVDINT: | |
1454 | /* could happen when rx chain is full */ | |
1455 | spider_net_refill_rx_chain(card); | |
11f1a52b | 1456 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
1457 | show_error = 0; |
1458 | break; | |
1459 | ||
1460 | /* case SPIDER_NET_GDTRSERINT: problem, print a message */ | |
1461 | /* case SPIDER_NET_GDDRSERINT: problem, print a message */ | |
1462 | /* case SPIDER_NET_GDCRSERINT: problem, print a message */ | |
1463 | /* case SPIDER_NET_GDBRSERINT: problem, print a message */ | |
1464 | /* case SPIDER_NET_GDARSERINT: problem, print a message */ | |
1465 | /* case SPIDER_NET_GDSERINT: problem, print a message */ | |
1466 | /* case SPIDER_NET_GDTPTERINT: problem, print a message */ | |
1467 | /* case SPIDER_NET_GDDPTERINT: problem, print a message */ | |
1468 | /* case SPIDER_NET_GDCPTERINT: problem, print a message */ | |
1469 | /* case SPIDER_NET_GDBPTERINT: problem, print a message */ | |
1470 | /* case SPIDER_NET_GDAPTERINT: problem, print a message */ | |
1471 | default: | |
1472 | show_error = 1; | |
1473 | break; | |
1474 | } | |
1475 | ||
1476 | /* check GHIINT2STS ************************************/ | |
1477 | if (error_reg2) | |
1478 | for (i = 0; i < 32; i++) | |
1479 | if (error_reg2 & (1<<i)) | |
1480 | switch (i) | |
1481 | { | |
1482 | /* there is nothing we can (want to) do at this time. Log a | |
1483 | * message, we can switch on and off the specific values later on | |
1484 | case SPIDER_NET_GPROPERINT: | |
1485 | case SPIDER_NET_GMCTCRSNGINT: | |
1486 | case SPIDER_NET_GMCTLCOLINT: | |
1487 | case SPIDER_NET_GMCTTMOTINT: | |
1488 | case SPIDER_NET_GMCRCAERINT: | |
1489 | case SPIDER_NET_GMCRCALERINT: | |
1490 | case SPIDER_NET_GMCRALNERINT: | |
1491 | case SPIDER_NET_GMCROVRINT: | |
1492 | case SPIDER_NET_GMCRRNTINT: | |
1493 | case SPIDER_NET_GMCRRXERINT: | |
1494 | case SPIDER_NET_GTITCSERINT: | |
1495 | case SPIDER_NET_GTIFMTERINT: | |
1496 | case SPIDER_NET_GTIPKTRVKINT: | |
1497 | case SPIDER_NET_GTISPINGINT: | |
1498 | case SPIDER_NET_GTISADNGINT: | |
1499 | case SPIDER_NET_GTISPDNGINT: | |
1500 | case SPIDER_NET_GRIFMTERINT: | |
1501 | case SPIDER_NET_GRIPKTRVKINT: | |
1502 | case SPIDER_NET_GRISPINGINT: | |
1503 | case SPIDER_NET_GRISADNGINT: | |
1504 | case SPIDER_NET_GRISPDNGINT: | |
1505 | break; | |
1506 | */ | |
1507 | default: | |
1508 | break; | |
1509 | } | |
1510 | ||
5a028877 | 1511 | if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) |
98b9040c | 1512 | pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, " |
aaec0fab | 1513 | "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", |
98b9040c | 1514 | card->netdev->name, |
aaec0fab JO |
1515 | status_reg, error_reg1, error_reg2); |
1516 | ||
1517 | /* clear interrupt sources */ | |
1518 | spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); | |
1519 | spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); | |
1520 | } | |
1521 | ||
1522 | /** | |
1523 | * spider_net_interrupt - interrupt handler for spider_net | |
1524 | * @irq: interupt number | |
1525 | * @ptr: pointer to net_device | |
1526 | * @regs: PU registers | |
1527 | * | |
1528 | * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no | |
1529 | * interrupt found raised by card. | |
1530 | * | |
1531 | * This is the interrupt handler, that turns off | |
1532 | * interrupts for this device and makes the stack poll the driver | |
1533 | */ | |
1534 | static irqreturn_t | |
7d12e780 | 1535 | spider_net_interrupt(int irq, void *ptr) |
aaec0fab JO |
1536 | { |
1537 | struct net_device *netdev = ptr; | |
1538 | struct spider_net_card *card = netdev_priv(netdev); | |
1539 | u32 status_reg; | |
1540 | ||
1541 | status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); | |
1542 | ||
1543 | if (!status_reg) | |
1544 | return IRQ_NONE; | |
1545 | ||
aaec0fab JO |
1546 | if (status_reg & SPIDER_NET_RXINT ) { |
1547 | spider_net_rx_irq_off(card); | |
1548 | netif_rx_schedule(netdev); | |
1549 | } | |
68a8c609 LV |
1550 | if (status_reg & SPIDER_NET_TXINT) |
1551 | netif_rx_schedule(netdev); | |
aaec0fab | 1552 | |
abdb66b5 KI |
1553 | if (status_reg & SPIDER_NET_LINKINT) |
1554 | spider_net_link_reset(netdev); | |
1555 | ||
11f1a52b AB |
1556 | if (status_reg & SPIDER_NET_ERRINT ) |
1557 | spider_net_handle_error_irq(card, status_reg); | |
aaec0fab JO |
1558 | |
1559 | /* clear interrupt sources */ | |
1560 | spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); | |
1561 | ||
1562 | return IRQ_HANDLED; | |
1563 | } | |
1564 | ||
1565 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1566 | /** | |
1567 | * spider_net_poll_controller - artificial interrupt for netconsole etc. | |
1568 | * @netdev: interface device structure | |
1569 | * | |
1570 | * see Documentation/networking/netconsole.txt | |
1571 | */ | |
1572 | static void | |
1573 | spider_net_poll_controller(struct net_device *netdev) | |
1574 | { | |
1575 | disable_irq(netdev->irq); | |
7d12e780 | 1576 | spider_net_interrupt(netdev->irq, netdev); |
aaec0fab JO |
1577 | enable_irq(netdev->irq); |
1578 | } | |
1579 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1580 | ||
1581 | /** | |
1582 | * spider_net_init_card - initializes the card | |
1583 | * @card: card structure | |
1584 | * | |
1585 | * spider_net_init_card initializes the card so that other registers can | |
1586 | * be used | |
1587 | */ | |
1588 | static void | |
1589 | spider_net_init_card(struct spider_net_card *card) | |
1590 | { | |
1591 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1592 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1593 | ||
1594 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1595 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
3342cf0e KI |
1596 | |
1597 | /* trigger ETOMOD signal */ | |
1598 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, | |
1599 | spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); | |
1600 | ||
aaec0fab JO |
1601 | } |
1602 | ||
1603 | /** | |
1604 | * spider_net_enable_card - enables the card by setting all kinds of regs | |
1605 | * @card: card structure | |
1606 | * | |
1607 | * spider_net_enable_card sets a lot of SMMIO registers to enable the device | |
1608 | */ | |
1609 | static void | |
1610 | spider_net_enable_card(struct spider_net_card *card) | |
1611 | { | |
1612 | int i; | |
1613 | /* the following array consists of (register),(value) pairs | |
1614 | * that are set in this function. A register of 0 ends the list */ | |
1615 | u32 regs[][2] = { | |
1616 | { SPIDER_NET_GRESUMINTNUM, 0 }, | |
1617 | { SPIDER_NET_GREINTNUM, 0 }, | |
1618 | ||
1619 | /* set interrupt frame number registers */ | |
1620 | /* clear the single DMA engine registers first */ | |
1621 | { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1622 | { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1623 | { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1624 | { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1625 | /* then set, what we really need */ | |
1626 | { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, | |
1627 | ||
1628 | /* timer counter registers and stuff */ | |
1629 | { SPIDER_NET_GFREECNNUM, 0 }, | |
1630 | { SPIDER_NET_GONETIMENUM, 0 }, | |
1631 | { SPIDER_NET_GTOUTFRMNUM, 0 }, | |
1632 | ||
1633 | /* RX mode setting */ | |
1634 | { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, | |
1635 | /* TX mode setting */ | |
1636 | { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, | |
1637 | /* IPSEC mode setting */ | |
1638 | { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, | |
1639 | ||
1640 | { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, | |
1641 | ||
1642 | { SPIDER_NET_GMRWOLCTRL, 0 }, | |
b636d17a JO |
1643 | { SPIDER_NET_GTESTMD, 0x10000000 }, |
1644 | { SPIDER_NET_GTTQMSK, 0x00400040 }, | |
aaec0fab JO |
1645 | |
1646 | { SPIDER_NET_GMACINTEN, 0 }, | |
1647 | ||
1648 | /* flow control stuff */ | |
1649 | { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, | |
1650 | { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, | |
1651 | ||
1652 | { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, | |
1653 | { 0, 0} | |
1654 | }; | |
1655 | ||
1656 | i = 0; | |
1657 | while (regs[i][0]) { | |
1658 | spider_net_write_reg(card, regs[i][0], regs[i][1]); | |
1659 | i++; | |
1660 | } | |
1661 | ||
1662 | /* clear unicast filter table entries 1 to 14 */ | |
1663 | for (i = 1; i <= 14; i++) { | |
1664 | spider_net_write_reg(card, | |
1665 | SPIDER_NET_GMRUAFILnR + i * 8, | |
1666 | 0x00080000); | |
1667 | spider_net_write_reg(card, | |
1668 | SPIDER_NET_GMRUAFILnR + i * 8 + 4, | |
1669 | 0x00000000); | |
1670 | } | |
1671 | ||
1672 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); | |
1673 | ||
1674 | spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); | |
1675 | ||
1676 | /* set chain tail adress for RX chains and | |
1677 | * enable DMA */ | |
1678 | spider_net_enable_rxchtails(card); | |
1679 | spider_net_enable_rxdmac(card); | |
1680 | ||
1681 | spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); | |
1682 | ||
aaec0fab JO |
1683 | spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, |
1684 | SPIDER_NET_LENLMT_VALUE); | |
aaec0fab JO |
1685 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, |
1686 | SPIDER_NET_OPMODE_VALUE); | |
1687 | ||
1688 | /* set interrupt mask registers */ | |
1689 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, | |
1690 | SPIDER_NET_INT0_MASK_VALUE); | |
1691 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, | |
1692 | SPIDER_NET_INT1_MASK_VALUE); | |
1693 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, | |
1694 | SPIDER_NET_INT2_MASK_VALUE); | |
bdd01503 JO |
1695 | |
1696 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
7bd54c86 | 1697 | SPIDER_NET_GDTBSTA); |
aaec0fab JO |
1698 | } |
1699 | ||
3cf761dd KI |
1700 | /** |
1701 | * spider_net_download_firmware - loads firmware into the adapter | |
1702 | * @card: card structure | |
1703 | * @firmware_ptr: pointer to firmware data | |
1704 | * | |
1705 | * spider_net_download_firmware loads the firmware data into the | |
1706 | * adapter. It assumes the length etc. to be allright. | |
1707 | */ | |
1708 | static int | |
1709 | spider_net_download_firmware(struct spider_net_card *card, | |
1710 | const void *firmware_ptr) | |
1711 | { | |
1712 | int sequencer, i; | |
1713 | const u32 *fw_ptr = firmware_ptr; | |
1714 | ||
1715 | /* stop sequencers */ | |
1716 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1717 | SPIDER_NET_STOP_SEQ_VALUE); | |
1718 | ||
1719 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; | |
1720 | sequencer++) { | |
1721 | spider_net_write_reg(card, | |
1722 | SPIDER_NET_GSnPRGADR + sequencer * 8, 0); | |
1723 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { | |
1724 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + | |
1725 | sequencer * 8, *fw_ptr); | |
1726 | fw_ptr++; | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) | |
1731 | return -EIO; | |
1732 | ||
1733 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1734 | SPIDER_NET_RUN_SEQ_VALUE); | |
1735 | ||
1736 | return 0; | |
1737 | } | |
1738 | ||
1739 | /** | |
1740 | * spider_net_init_firmware - reads in firmware parts | |
1741 | * @card: card structure | |
1742 | * | |
1743 | * Returns 0 on success, <0 on failure | |
1744 | * | |
1745 | * spider_net_init_firmware opens the sequencer firmware and does some basic | |
1746 | * checks. This function opens and releases the firmware structure. A call | |
1747 | * to download the firmware is performed before the release. | |
1748 | * | |
1749 | * Firmware format | |
1750 | * =============== | |
1751 | * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being | |
1752 | * the program for each sequencer. Use the command | |
1753 | * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ | |
1754 | * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ | |
1755 | * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin | |
1756 | * | |
1757 | * to generate spider_fw.bin, if you have sequencer programs with something | |
1758 | * like the following contents for each sequencer: | |
1759 | * <ONE LINE COMMENT> | |
1760 | * <FIRST 4-BYTES-WORD FOR SEQUENCER> | |
1761 | * <SECOND 4-BYTES-WORD FOR SEQUENCER> | |
1762 | * ... | |
1763 | * <1024th 4-BYTES-WORD FOR SEQUENCER> | |
1764 | */ | |
1765 | static int | |
1766 | spider_net_init_firmware(struct spider_net_card *card) | |
1767 | { | |
1768 | struct firmware *firmware = NULL; | |
1769 | struct device_node *dn; | |
1770 | const u8 *fw_prop = NULL; | |
1771 | int err = -ENOENT; | |
1772 | int fw_size; | |
1773 | ||
1774 | if (request_firmware((const struct firmware **)&firmware, | |
1775 | SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { | |
1776 | if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && | |
1777 | netif_msg_probe(card) ) { | |
1778 | pr_err("Incorrect size of spidernet firmware in " \ | |
1779 | "filesystem. Looking in host firmware...\n"); | |
1780 | goto try_host_fw; | |
1781 | } | |
1782 | err = spider_net_download_firmware(card, firmware->data); | |
1783 | ||
1784 | release_firmware(firmware); | |
1785 | if (err) | |
1786 | goto try_host_fw; | |
1787 | ||
1788 | goto done; | |
1789 | } | |
1790 | ||
1791 | try_host_fw: | |
1792 | dn = pci_device_to_OF_node(card->pdev); | |
1793 | if (!dn) | |
1794 | goto out_err; | |
1795 | ||
40cd3a45 | 1796 | fw_prop = of_get_property(dn, "firmware", &fw_size); |
3cf761dd KI |
1797 | if (!fw_prop) |
1798 | goto out_err; | |
1799 | ||
1800 | if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && | |
1801 | netif_msg_probe(card) ) { | |
1802 | pr_err("Incorrect size of spidernet firmware in " \ | |
1803 | "host firmware\n"); | |
1804 | goto done; | |
1805 | } | |
1806 | ||
1807 | err = spider_net_download_firmware(card, fw_prop); | |
1808 | ||
1809 | done: | |
1810 | return err; | |
1811 | out_err: | |
1812 | if (netif_msg_probe(card)) | |
1813 | pr_err("Couldn't find spidernet firmware in filesystem " \ | |
1814 | "or host firmware\n"); | |
1815 | return err; | |
1816 | } | |
1817 | ||
aaec0fab JO |
1818 | /** |
1819 | * spider_net_open - called upon ifonfig up | |
1820 | * @netdev: interface device structure | |
1821 | * | |
1822 | * returns 0 on success, <0 on failure | |
1823 | * | |
1824 | * spider_net_open allocates all the descriptors and memory needed for | |
1825 | * operation, sets up multicast list and enables interrupts | |
1826 | */ | |
1827 | int | |
1828 | spider_net_open(struct net_device *netdev) | |
1829 | { | |
1830 | struct spider_net_card *card = netdev_priv(netdev); | |
d4ed8f8d | 1831 | int result; |
aaec0fab | 1832 | |
3cf761dd KI |
1833 | result = spider_net_init_firmware(card); |
1834 | if (result) | |
1835 | goto init_firmware_failed; | |
1836 | ||
abdb66b5 KI |
1837 | /* start probing with copper */ |
1838 | spider_net_setup_aneg(card); | |
1839 | if (card->phy.def->phy_id) | |
1840 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1841 | ||
d4ed8f8d LV |
1842 | result = spider_net_init_chain(card, &card->tx_chain); |
1843 | if (result) | |
aaec0fab | 1844 | goto alloc_tx_failed; |
204e5fa1 LV |
1845 | card->low_watermark = NULL; |
1846 | ||
d4ed8f8d LV |
1847 | result = spider_net_init_chain(card, &card->rx_chain); |
1848 | if (result) | |
aaec0fab JO |
1849 | goto alloc_rx_failed; |
1850 | ||
d4ed8f8d | 1851 | /* Allocate rx skbs */ |
aaec0fab JO |
1852 | if (spider_net_alloc_rx_skbs(card)) |
1853 | goto alloc_skbs_failed; | |
1854 | ||
1855 | spider_net_set_multi(netdev); | |
1856 | ||
1857 | /* further enhancement: setup hw vlan, if needed */ | |
1858 | ||
1859 | result = -EBUSY; | |
1860 | if (request_irq(netdev->irq, spider_net_interrupt, | |
1fb9df5d | 1861 | IRQF_SHARED, netdev->name, netdev)) |
aaec0fab JO |
1862 | goto register_int_failed; |
1863 | ||
1864 | spider_net_enable_card(card); | |
1865 | ||
543cec51 JO |
1866 | netif_start_queue(netdev); |
1867 | netif_carrier_on(netdev); | |
1868 | netif_poll_enable(netdev); | |
1869 | ||
aaec0fab JO |
1870 | return 0; |
1871 | ||
1872 | register_int_failed: | |
1873 | spider_net_free_rx_chain_contents(card); | |
1874 | alloc_skbs_failed: | |
1875 | spider_net_free_chain(card, &card->rx_chain); | |
1876 | alloc_rx_failed: | |
1877 | spider_net_free_chain(card, &card->tx_chain); | |
1878 | alloc_tx_failed: | |
abdb66b5 | 1879 | del_timer_sync(&card->aneg_timer); |
3cf761dd | 1880 | init_firmware_failed: |
aaec0fab JO |
1881 | return result; |
1882 | } | |
1883 | ||
abdb66b5 KI |
1884 | /** |
1885 | * spider_net_link_phy | |
1886 | * @data: used for pointer to card structure | |
1887 | * | |
1888 | */ | |
1889 | static void spider_net_link_phy(unsigned long data) | |
1890 | { | |
1891 | struct spider_net_card *card = (struct spider_net_card *)data; | |
1892 | struct mii_phy *phy = &card->phy; | |
1893 | ||
1894 | /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ | |
1895 | if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { | |
1896 | ||
1897 | pr_info("%s: link is down trying to bring it up\n", card->netdev->name); | |
1898 | ||
4b23a554 JO |
1899 | switch (card->medium) { |
1900 | case BCM54XX_COPPER: | |
abdb66b5 KI |
1901 | /* enable fiber with autonegotiation first */ |
1902 | if (phy->def->ops->enable_fiber) | |
1903 | phy->def->ops->enable_fiber(phy, 1); | |
4b23a554 | 1904 | card->medium = BCM54XX_FIBER; |
abdb66b5 KI |
1905 | break; |
1906 | ||
4b23a554 | 1907 | case BCM54XX_FIBER: |
abdb66b5 KI |
1908 | /* fiber didn't come up, try to disable fiber autoneg */ |
1909 | if (phy->def->ops->enable_fiber) | |
1910 | phy->def->ops->enable_fiber(phy, 0); | |
4b23a554 | 1911 | card->medium = BCM54XX_UNKNOWN; |
abdb66b5 KI |
1912 | break; |
1913 | ||
4b23a554 | 1914 | case BCM54XX_UNKNOWN: |
abdb66b5 KI |
1915 | /* copper, fiber with and without failed, |
1916 | * retry from beginning */ | |
1917 | spider_net_setup_aneg(card); | |
4b23a554 | 1918 | card->medium = BCM54XX_COPPER; |
abdb66b5 KI |
1919 | break; |
1920 | } | |
1921 | ||
1922 | card->aneg_count = 0; | |
1923 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1924 | return; | |
1925 | } | |
1926 | ||
1927 | /* link still not up, try again later */ | |
1928 | if (!(phy->def->ops->poll_link(phy))) { | |
1929 | card->aneg_count++; | |
1930 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1931 | return; | |
1932 | } | |
1933 | ||
1934 | /* link came up, get abilities */ | |
1935 | phy->def->ops->read_link(phy); | |
1936 | ||
1937 | spider_net_write_reg(card, SPIDER_NET_GMACST, | |
1938 | spider_net_read_reg(card, SPIDER_NET_GMACST)); | |
1939 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); | |
1940 | ||
1941 | if (phy->speed == 1000) | |
1942 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); | |
1943 | else | |
1944 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); | |
1945 | ||
1946 | card->aneg_count = 0; | |
1947 | ||
1948 | pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n", | |
1949 | phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half", | |
1950 | phy->autoneg==1 ? "" : "no "); | |
1951 | ||
1952 | return; | |
1953 | } | |
1954 | ||
aaec0fab JO |
1955 | /** |
1956 | * spider_net_setup_phy - setup PHY | |
1957 | * @card: card structure | |
1958 | * | |
1959 | * returns 0 on success, <0 on failure | |
1960 | * | |
abdb66b5 | 1961 | * spider_net_setup_phy is used as part of spider_net_probe. |
aaec0fab JO |
1962 | **/ |
1963 | static int | |
1964 | spider_net_setup_phy(struct spider_net_card *card) | |
1965 | { | |
1966 | struct mii_phy *phy = &card->phy; | |
1967 | ||
1968 | spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, | |
1969 | SPIDER_NET_DMASEL_VALUE); | |
1970 | spider_net_write_reg(card, SPIDER_NET_GPCCTRL, | |
1971 | SPIDER_NET_PHY_CTRL_VALUE); | |
abdb66b5 | 1972 | |
aaec0fab JO |
1973 | phy->dev = card->netdev; |
1974 | phy->mdio_read = spider_net_read_phy; | |
1975 | phy->mdio_write = spider_net_write_phy; | |
1976 | ||
abdb66b5 KI |
1977 | for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { |
1978 | unsigned short id; | |
1979 | id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); | |
1980 | if (id != 0x0000 && id != 0xffff) { | |
1981 | if (!mii_phy_probe(phy, phy->mii_id)) { | |
1982 | pr_info("Found %s.\n", phy->def->name); | |
1983 | break; | |
1984 | } | |
1985 | } | |
1986 | } | |
aaec0fab JO |
1987 | |
1988 | return 0; | |
1989 | } | |
1990 | ||
aaec0fab JO |
1991 | /** |
1992 | * spider_net_workaround_rxramfull - work around firmware bug | |
1993 | * @card: card structure | |
1994 | * | |
1995 | * no return value | |
1996 | **/ | |
1997 | static void | |
1998 | spider_net_workaround_rxramfull(struct spider_net_card *card) | |
1999 | { | |
2000 | int i, sequencer = 0; | |
2001 | ||
2002 | /* cancel reset */ | |
2003 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2004 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2005 | ||
2006 | /* empty sequencer data */ | |
11f1a52b AB |
2007 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
2008 | sequencer++) { | |
ee962a5c | 2009 | spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + |
aaec0fab | 2010 | sequencer * 8, 0x0); |
11f1a52b | 2011 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
aaec0fab JO |
2012 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
2013 | sequencer * 8, 0x0); | |
2014 | } | |
2015 | } | |
2016 | ||
2017 | /* set sequencer operation */ | |
2018 | spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); | |
2019 | ||
2020 | /* reset */ | |
2021 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2022 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2023 | } | |
2024 | ||
bdd01503 JO |
2025 | /** |
2026 | * spider_net_stop - called upon ifconfig down | |
2027 | * @netdev: interface device structure | |
2028 | * | |
2029 | * always returns 0 | |
2030 | */ | |
2031 | int | |
2032 | spider_net_stop(struct net_device *netdev) | |
2033 | { | |
2034 | struct spider_net_card *card = netdev_priv(netdev); | |
2035 | ||
bdd01503 JO |
2036 | netif_poll_disable(netdev); |
2037 | netif_carrier_off(netdev); | |
2038 | netif_stop_queue(netdev); | |
2039 | del_timer_sync(&card->tx_timer); | |
abdb66b5 | 2040 | del_timer_sync(&card->aneg_timer); |
bdd01503 JO |
2041 | |
2042 | /* disable/mask all interrupts */ | |
2043 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); | |
2044 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); | |
2045 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); | |
abdb66b5 | 2046 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); |
bdd01503 | 2047 | |
d406eafe | 2048 | free_irq(netdev->irq, netdev); |
bdd01503 JO |
2049 | |
2050 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
2051 | SPIDER_NET_DMA_TX_FEND_VALUE); | |
2052 | ||
2053 | /* turn off DMA, force end */ | |
2054 | spider_net_disable_rxdmac(card); | |
2055 | ||
2056 | /* release chains */ | |
9cc7bf7e | 2057 | spider_net_release_tx_chain(card, 1); |
d4ed8f8d | 2058 | spider_net_free_rx_chain_contents(card); |
bdd01503 JO |
2059 | |
2060 | spider_net_free_chain(card, &card->tx_chain); | |
2061 | spider_net_free_chain(card, &card->rx_chain); | |
2062 | ||
2063 | return 0; | |
2064 | } | |
2065 | ||
aaec0fab JO |
2066 | /** |
2067 | * spider_net_tx_timeout_task - task scheduled by the watchdog timeout | |
2068 | * function (to be called not under interrupt status) | |
2069 | * @data: data, is interface device structure | |
2070 | * | |
2071 | * called as task when tx hangs, resets interface (if interface is up) | |
2072 | */ | |
2073 | static void | |
c4028958 | 2074 | spider_net_tx_timeout_task(struct work_struct *work) |
aaec0fab | 2075 | { |
c4028958 DH |
2076 | struct spider_net_card *card = |
2077 | container_of(work, struct spider_net_card, tx_timeout_task); | |
2078 | struct net_device *netdev = card->netdev; | |
aaec0fab JO |
2079 | |
2080 | if (!(netdev->flags & IFF_UP)) | |
2081 | goto out; | |
2082 | ||
2083 | netif_device_detach(netdev); | |
2084 | spider_net_stop(netdev); | |
2085 | ||
2086 | spider_net_workaround_rxramfull(card); | |
2087 | spider_net_init_card(card); | |
2088 | ||
2089 | if (spider_net_setup_phy(card)) | |
2090 | goto out; | |
aaec0fab JO |
2091 | |
2092 | spider_net_open(netdev); | |
bdd01503 | 2093 | spider_net_kick_tx_dma(card); |
aaec0fab JO |
2094 | netif_device_attach(netdev); |
2095 | ||
2096 | out: | |
2097 | atomic_dec(&card->tx_timeout_task_counter); | |
2098 | } | |
2099 | ||
2100 | /** | |
2101 | * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. | |
2102 | * @netdev: interface device structure | |
2103 | * | |
2104 | * called, if tx hangs. Schedules a task that resets the interface | |
2105 | */ | |
2106 | static void | |
2107 | spider_net_tx_timeout(struct net_device *netdev) | |
2108 | { | |
2109 | struct spider_net_card *card; | |
2110 | ||
2111 | card = netdev_priv(netdev); | |
2112 | atomic_inc(&card->tx_timeout_task_counter); | |
2113 | if (netdev->flags & IFF_UP) | |
2114 | schedule_work(&card->tx_timeout_task); | |
2115 | else | |
2116 | atomic_dec(&card->tx_timeout_task_counter); | |
9b6b0b81 | 2117 | card->spider_stats.tx_timeouts++; |
aaec0fab JO |
2118 | } |
2119 | ||
2120 | /** | |
2121 | * spider_net_setup_netdev_ops - initialization of net_device operations | |
2122 | * @netdev: net_device structure | |
2123 | * | |
2124 | * fills out function pointers in the net_device structure | |
2125 | */ | |
2126 | static void | |
2127 | spider_net_setup_netdev_ops(struct net_device *netdev) | |
2128 | { | |
2129 | netdev->open = &spider_net_open; | |
2130 | netdev->stop = &spider_net_stop; | |
2131 | netdev->hard_start_xmit = &spider_net_xmit; | |
2132 | netdev->get_stats = &spider_net_get_stats; | |
2133 | netdev->set_multicast_list = &spider_net_set_multi; | |
2134 | netdev->set_mac_address = &spider_net_set_mac; | |
2135 | netdev->change_mtu = &spider_net_change_mtu; | |
2136 | netdev->do_ioctl = &spider_net_do_ioctl; | |
2137 | /* tx watchdog */ | |
2138 | netdev->tx_timeout = &spider_net_tx_timeout; | |
2139 | netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; | |
2140 | /* NAPI */ | |
2141 | netdev->poll = &spider_net_poll; | |
2142 | netdev->weight = SPIDER_NET_NAPI_WEIGHT; | |
2143 | /* HW VLAN */ | |
aaec0fab JO |
2144 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2145 | /* poll controller */ | |
2146 | netdev->poll_controller = &spider_net_poll_controller; | |
2147 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
2148 | /* ethtool ops */ | |
2149 | netdev->ethtool_ops = &spider_net_ethtool_ops; | |
2150 | } | |
2151 | ||
2152 | /** | |
2153 | * spider_net_setup_netdev - initialization of net_device | |
2154 | * @card: card structure | |
2155 | * | |
2156 | * Returns 0 on success or <0 on failure | |
2157 | * | |
2158 | * spider_net_setup_netdev initializes the net_device structure | |
2159 | **/ | |
2160 | static int | |
2161 | spider_net_setup_netdev(struct spider_net_card *card) | |
2162 | { | |
2163 | int result; | |
2164 | struct net_device *netdev = card->netdev; | |
2165 | struct device_node *dn; | |
2166 | struct sockaddr addr; | |
1a2509c9 | 2167 | const u8 *mac; |
aaec0fab JO |
2168 | |
2169 | SET_MODULE_OWNER(netdev); | |
2170 | SET_NETDEV_DEV(netdev, &card->pdev->dev); | |
2171 | ||
2172 | pci_set_drvdata(card->pdev, netdev); | |
11f1a52b | 2173 | |
11f1a52b AB |
2174 | init_timer(&card->tx_timer); |
2175 | card->tx_timer.function = | |
2176 | (void (*)(unsigned long)) spider_net_cleanup_tx_ring; | |
2177 | card->tx_timer.data = (unsigned long) card; | |
aaec0fab JO |
2178 | netdev->irq = card->pdev->irq; |
2179 | ||
abdb66b5 KI |
2180 | card->aneg_count = 0; |
2181 | init_timer(&card->aneg_timer); | |
2182 | card->aneg_timer.function = spider_net_link_phy; | |
2183 | card->aneg_timer.data = (unsigned long) card; | |
2184 | ||
aaec0fab JO |
2185 | card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT; |
2186 | ||
2187 | spider_net_setup_netdev_ops(netdev); | |
2188 | ||
bdd01503 | 2189 | netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX; |
aaec0fab JO |
2190 | /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | |
2191 | * NETIF_F_HW_VLAN_FILTER */ | |
2192 | ||
2193 | netdev->irq = card->pdev->irq; | |
2194 | ||
2195 | dn = pci_device_to_OF_node(card->pdev); | |
543cec51 JO |
2196 | if (!dn) |
2197 | return -EIO; | |
2198 | ||
40cd3a45 | 2199 | mac = of_get_property(dn, "local-mac-address", NULL); |
543cec51 JO |
2200 | if (!mac) |
2201 | return -EIO; | |
aaec0fab JO |
2202 | memcpy(addr.sa_data, mac, ETH_ALEN); |
2203 | ||
2204 | result = spider_net_set_mac(netdev, &addr); | |
2205 | if ((result) && (netif_msg_probe(card))) | |
2206 | pr_err("Failed to set MAC address: %i\n", result); | |
2207 | ||
2208 | result = register_netdev(netdev); | |
2209 | if (result) { | |
2210 | if (netif_msg_probe(card)) | |
2211 | pr_err("Couldn't register net_device: %i\n", | |
2212 | result); | |
2213 | return result; | |
2214 | } | |
2215 | ||
2216 | if (netif_msg_probe(card)) | |
2217 | pr_info("Initialized device %s.\n", netdev->name); | |
2218 | ||
2219 | return 0; | |
2220 | } | |
2221 | ||
2222 | /** | |
2223 | * spider_net_alloc_card - allocates net_device and card structure | |
2224 | * | |
2225 | * returns the card structure or NULL in case of errors | |
2226 | * | |
2227 | * the card and net_device structures are linked to each other | |
2228 | */ | |
2229 | static struct spider_net_card * | |
2230 | spider_net_alloc_card(void) | |
2231 | { | |
2232 | struct net_device *netdev; | |
2233 | struct spider_net_card *card; | |
4cb6f9e5 | 2234 | size_t alloc_size; |
aaec0fab | 2235 | |
4cb6f9e5 LV |
2236 | alloc_size = sizeof(struct spider_net_card) + |
2237 | (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr); | |
2238 | netdev = alloc_etherdev(alloc_size); | |
aaec0fab JO |
2239 | if (!netdev) |
2240 | return NULL; | |
2241 | ||
2242 | card = netdev_priv(netdev); | |
2243 | card->netdev = netdev; | |
2244 | card->msg_enable = SPIDER_NET_DEFAULT_MSG; | |
c4028958 | 2245 | INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); |
aaec0fab JO |
2246 | init_waitqueue_head(&card->waitq); |
2247 | atomic_set(&card->tx_timeout_task_counter, 0); | |
2248 | ||
4cb6f9e5 LV |
2249 | card->rx_chain.num_desc = rx_descriptors; |
2250 | card->rx_chain.ring = card->darray; | |
2251 | card->tx_chain.num_desc = tx_descriptors; | |
2252 | card->tx_chain.ring = card->darray + rx_descriptors; | |
2253 | ||
aaec0fab JO |
2254 | return card; |
2255 | } | |
2256 | ||
2257 | /** | |
2258 | * spider_net_undo_pci_setup - releases PCI ressources | |
2259 | * @card: card structure | |
2260 | * | |
2261 | * spider_net_undo_pci_setup releases the mapped regions | |
2262 | */ | |
2263 | static void | |
2264 | spider_net_undo_pci_setup(struct spider_net_card *card) | |
2265 | { | |
2266 | iounmap(card->regs); | |
2267 | pci_release_regions(card->pdev); | |
2268 | } | |
2269 | ||
2270 | /** | |
2271 | * spider_net_setup_pci_dev - sets up the device in terms of PCI operations | |
2272 | * @card: card structure | |
2273 | * @pdev: PCI device | |
2274 | * | |
2275 | * Returns the card structure or NULL if any errors occur | |
2276 | * | |
2277 | * spider_net_setup_pci_dev initializes pdev and together with the | |
2278 | * functions called in spider_net_open configures the device so that | |
2279 | * data can be transferred over it | |
2280 | * The net_device structure is attached to the card structure, if the | |
2281 | * function returns without error. | |
2282 | **/ | |
2283 | static struct spider_net_card * | |
2284 | spider_net_setup_pci_dev(struct pci_dev *pdev) | |
2285 | { | |
2286 | struct spider_net_card *card; | |
2287 | unsigned long mmio_start, mmio_len; | |
2288 | ||
2289 | if (pci_enable_device(pdev)) { | |
2290 | pr_err("Couldn't enable PCI device\n"); | |
2291 | return NULL; | |
2292 | } | |
2293 | ||
2294 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
2295 | pr_err("Couldn't find proper PCI device base address.\n"); | |
2296 | goto out_disable_dev; | |
2297 | } | |
2298 | ||
2299 | if (pci_request_regions(pdev, spider_net_driver_name)) { | |
2300 | pr_err("Couldn't obtain PCI resources, aborting.\n"); | |
2301 | goto out_disable_dev; | |
2302 | } | |
2303 | ||
2304 | pci_set_master(pdev); | |
2305 | ||
2306 | card = spider_net_alloc_card(); | |
2307 | if (!card) { | |
2308 | pr_err("Couldn't allocate net_device structure, " | |
2309 | "aborting.\n"); | |
2310 | goto out_release_regions; | |
2311 | } | |
2312 | card->pdev = pdev; | |
2313 | ||
2314 | /* fetch base address and length of first resource */ | |
2315 | mmio_start = pci_resource_start(pdev, 0); | |
2316 | mmio_len = pci_resource_len(pdev, 0); | |
2317 | ||
2318 | card->netdev->mem_start = mmio_start; | |
2319 | card->netdev->mem_end = mmio_start + mmio_len; | |
2320 | card->regs = ioremap(mmio_start, mmio_len); | |
2321 | ||
2322 | if (!card->regs) { | |
2323 | pr_err("Couldn't obtain PCI resources, aborting.\n"); | |
2324 | goto out_release_regions; | |
2325 | } | |
2326 | ||
2327 | return card; | |
2328 | ||
2329 | out_release_regions: | |
2330 | pci_release_regions(pdev); | |
2331 | out_disable_dev: | |
2332 | pci_disable_device(pdev); | |
2333 | pci_set_drvdata(pdev, NULL); | |
2334 | return NULL; | |
2335 | } | |
2336 | ||
2337 | /** | |
2338 | * spider_net_probe - initialization of a device | |
2339 | * @pdev: PCI device | |
2340 | * @ent: entry in the device id list | |
2341 | * | |
2342 | * Returns 0 on success, <0 on failure | |
2343 | * | |
2344 | * spider_net_probe initializes pdev and registers a net_device | |
2345 | * structure for it. After that, the device can be ifconfig'ed up | |
2346 | **/ | |
2347 | static int __devinit | |
2348 | spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
2349 | { | |
2350 | int err = -EIO; | |
2351 | struct spider_net_card *card; | |
2352 | ||
2353 | card = spider_net_setup_pci_dev(pdev); | |
2354 | if (!card) | |
2355 | goto out; | |
2356 | ||
2357 | spider_net_workaround_rxramfull(card); | |
2358 | spider_net_init_card(card); | |
2359 | ||
2360 | err = spider_net_setup_phy(card); | |
2361 | if (err) | |
2362 | goto out_undo_pci; | |
2363 | ||
aaec0fab JO |
2364 | err = spider_net_setup_netdev(card); |
2365 | if (err) | |
2366 | goto out_undo_pci; | |
2367 | ||
2368 | return 0; | |
2369 | ||
2370 | out_undo_pci: | |
2371 | spider_net_undo_pci_setup(card); | |
2372 | free_netdev(card->netdev); | |
2373 | out: | |
2374 | return err; | |
2375 | } | |
2376 | ||
2377 | /** | |
2378 | * spider_net_remove - removal of a device | |
2379 | * @pdev: PCI device | |
2380 | * | |
2381 | * Returns 0 on success, <0 on failure | |
2382 | * | |
2383 | * spider_net_remove is called to remove the device and unregisters the | |
2384 | * net_device | |
2385 | **/ | |
2386 | static void __devexit | |
2387 | spider_net_remove(struct pci_dev *pdev) | |
2388 | { | |
2389 | struct net_device *netdev; | |
2390 | struct spider_net_card *card; | |
2391 | ||
2392 | netdev = pci_get_drvdata(pdev); | |
2393 | card = netdev_priv(netdev); | |
2394 | ||
2395 | wait_event(card->waitq, | |
2396 | atomic_read(&card->tx_timeout_task_counter) == 0); | |
2397 | ||
2398 | unregister_netdev(netdev); | |
543cec51 JO |
2399 | |
2400 | /* switch off card */ | |
2401 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2402 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2403 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2404 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2405 | ||
aaec0fab JO |
2406 | spider_net_undo_pci_setup(card); |
2407 | free_netdev(netdev); | |
aaec0fab JO |
2408 | } |
2409 | ||
2410 | static struct pci_driver spider_net_driver = { | |
aaec0fab JO |
2411 | .name = spider_net_driver_name, |
2412 | .id_table = spider_net_pci_tbl, | |
2413 | .probe = spider_net_probe, | |
2414 | .remove = __devexit_p(spider_net_remove) | |
2415 | }; | |
2416 | ||
2417 | /** | |
2418 | * spider_net_init - init function when the driver is loaded | |
2419 | * | |
2420 | * spider_net_init registers the device driver | |
2421 | */ | |
2422 | static int __init spider_net_init(void) | |
2423 | { | |
90f10841 LV |
2424 | printk(KERN_INFO "Spidernet version %s.\n", VERSION); |
2425 | ||
aaec0fab JO |
2426 | if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { |
2427 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; | |
2428 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2429 | } | |
2430 | if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { | |
2431 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; | |
2432 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2433 | } | |
2434 | if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { | |
2435 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; | |
2436 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2437 | } | |
2438 | if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { | |
2439 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; | |
2440 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2441 | } | |
2442 | ||
2443 | return pci_register_driver(&spider_net_driver); | |
2444 | } | |
2445 | ||
2446 | /** | |
2447 | * spider_net_cleanup - exit function when driver is unloaded | |
2448 | * | |
2449 | * spider_net_cleanup unregisters the device driver | |
2450 | */ | |
2451 | static void __exit spider_net_cleanup(void) | |
2452 | { | |
2453 | pci_unregister_driver(&spider_net_driver); | |
2454 | } | |
2455 | ||
2456 | module_init(spider_net_init); | |
2457 | module_exit(spider_net_cleanup); |