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 | 33 | #include <linux/init.h> |
a6b7a407 | 34 | #include <linux/interrupt.h> |
5a0e3ad6 | 35 | #include <linux/gfp.h> |
aaec0fab JO |
36 | #include <linux/ioport.h> |
37 | #include <linux/ip.h> | |
38 | #include <linux/kernel.h> | |
39 | #include <linux/mii.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/netdevice.h> | |
42 | #include <linux/device.h> | |
43 | #include <linux/pci.h> | |
44 | #include <linux/skbuff.h> | |
aaec0fab JO |
45 | #include <linux/tcp.h> |
46 | #include <linux/types.h> | |
11f1a52b | 47 | #include <linux/vmalloc.h> |
aaec0fab JO |
48 | #include <linux/wait.h> |
49 | #include <linux/workqueue.h> | |
1977f032 | 50 | #include <linux/bitops.h> |
aaec0fab JO |
51 | #include <asm/pci-bridge.h> |
52 | #include <net/checksum.h> | |
53 | ||
54 | #include "spider_net.h" | |
55 | ||
56 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ | |
57 | "<Jens.Osterkamp@de.ibm.com>"); | |
58 | MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); | |
59 | MODULE_LICENSE("GPL"); | |
90f10841 | 60 | MODULE_VERSION(VERSION); |
866691a2 | 61 | MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME); |
aaec0fab JO |
62 | |
63 | static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; | |
64 | static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; | |
65 | ||
e2874f2e LV |
66 | module_param(rx_descriptors, int, 0444); |
67 | module_param(tx_descriptors, int, 0444); | |
aaec0fab JO |
68 | |
69 | MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ | |
70 | "in rx chains"); | |
71 | MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ | |
72 | "in tx chain"); | |
73 | ||
74 | char spider_net_driver_name[] = "spidernet"; | |
75 | ||
9baa3c34 | 76 | static const struct pci_device_id spider_net_pci_tbl[] = { |
aaec0fab JO |
77 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, |
78 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, | |
79 | { 0, } | |
80 | }; | |
81 | ||
82 | MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); | |
83 | ||
84 | /** | |
85 | * spider_net_read_reg - reads an SMMIO register of a card | |
86 | * @card: device structure | |
87 | * @reg: register to read from | |
88 | * | |
89 | * returns the content of the specified SMMIO register. | |
90 | */ | |
bdd01503 | 91 | static inline u32 |
aaec0fab JO |
92 | spider_net_read_reg(struct spider_net_card *card, u32 reg) |
93 | { | |
3bc0f40c BH |
94 | /* We use the powerpc specific variants instead of readl_be() because |
95 | * we know spidernet is not a real PCI device and we can thus avoid the | |
96 | * performance hit caused by the PCI workarounds. | |
97 | */ | |
98 | return in_be32(card->regs + reg); | |
aaec0fab JO |
99 | } |
100 | ||
101 | /** | |
102 | * spider_net_write_reg - writes to an SMMIO register of a card | |
103 | * @card: device structure | |
104 | * @reg: register to write to | |
105 | * @value: value to write into the specified SMMIO register | |
106 | */ | |
bdd01503 | 107 | static inline void |
aaec0fab JO |
108 | spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) |
109 | { | |
3bc0f40c BH |
110 | /* We use the powerpc specific variants instead of writel_be() because |
111 | * we know spidernet is not a real PCI device and we can thus avoid the | |
112 | * performance hit caused by the PCI workarounds. | |
113 | */ | |
114 | out_be32(card->regs + reg, value); | |
aaec0fab JO |
115 | } |
116 | ||
49ce9c2c BH |
117 | /** |
118 | * spider_net_write_phy - write to phy register | |
aaec0fab JO |
119 | * @netdev: adapter to be written to |
120 | * @mii_id: id of MII | |
121 | * @reg: PHY register | |
122 | * @val: value to be written to phy register | |
123 | * | |
124 | * spider_net_write_phy_register writes to an arbitrary PHY | |
125 | * register via the spider GPCWOPCMD register. We assume the queue does | |
126 | * not run full (not more than 15 commands outstanding). | |
127 | **/ | |
128 | static void | |
129 | spider_net_write_phy(struct net_device *netdev, int mii_id, | |
130 | int reg, int val) | |
131 | { | |
132 | struct spider_net_card *card = netdev_priv(netdev); | |
133 | u32 writevalue; | |
134 | ||
135 | writevalue = ((u32)mii_id << 21) | | |
136 | ((u32)reg << 16) | ((u32)val); | |
137 | ||
138 | spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); | |
139 | } | |
140 | ||
49ce9c2c BH |
141 | /** |
142 | * spider_net_read_phy - read from phy register | |
aaec0fab JO |
143 | * @netdev: network device to be read from |
144 | * @mii_id: id of MII | |
145 | * @reg: PHY register | |
146 | * | |
147 | * Returns value read from PHY register | |
148 | * | |
149 | * spider_net_write_phy reads from an arbitrary PHY | |
150 | * register via the spider GPCROPCMD register | |
151 | **/ | |
152 | static int | |
153 | spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) | |
154 | { | |
155 | struct spider_net_card *card = netdev_priv(netdev); | |
156 | u32 readvalue; | |
157 | ||
158 | readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); | |
159 | spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); | |
160 | ||
161 | /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT | |
162 | * interrupt, as we poll for the completion of the read operation | |
163 | * in spider_net_read_phy. Should take about 50 us */ | |
164 | do { | |
165 | readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); | |
166 | } while (readvalue & SPIDER_NET_GPREXEC); | |
167 | ||
168 | readvalue &= SPIDER_NET_GPRDAT_MASK; | |
169 | ||
170 | return readvalue; | |
171 | } | |
172 | ||
abdb66b5 KI |
173 | /** |
174 | * spider_net_setup_aneg - initial auto-negotiation setup | |
175 | * @card: device structure | |
176 | **/ | |
177 | static void | |
178 | spider_net_setup_aneg(struct spider_net_card *card) | |
179 | { | |
180 | struct mii_phy *phy = &card->phy; | |
181 | u32 advertise = 0; | |
a1c38a4a | 182 | u16 bmsr, estat; |
abdb66b5 | 183 | |
a1c38a4a IK |
184 | bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); |
185 | estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); | |
abdb66b5 KI |
186 | |
187 | if (bmsr & BMSR_10HALF) | |
188 | advertise |= ADVERTISED_10baseT_Half; | |
189 | if (bmsr & BMSR_10FULL) | |
190 | advertise |= ADVERTISED_10baseT_Full; | |
191 | if (bmsr & BMSR_100HALF) | |
192 | advertise |= ADVERTISED_100baseT_Half; | |
193 | if (bmsr & BMSR_100FULL) | |
194 | advertise |= ADVERTISED_100baseT_Full; | |
195 | ||
196 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) | |
197 | advertise |= SUPPORTED_1000baseT_Full; | |
198 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) | |
199 | advertise |= SUPPORTED_1000baseT_Half; | |
200 | ||
19e2f6fe | 201 | sungem_phy_probe(phy, phy->mii_id); |
abdb66b5 KI |
202 | phy->def->ops->setup_aneg(phy, advertise); |
203 | ||
204 | } | |
205 | ||
aaec0fab | 206 | /** |
11f1a52b | 207 | * spider_net_rx_irq_off - switch off rx irq on this spider card |
aaec0fab JO |
208 | * @card: device structure |
209 | * | |
11f1a52b | 210 | * switches off rx irq by masking them out in the GHIINTnMSK register |
aaec0fab JO |
211 | */ |
212 | static void | |
11f1a52b | 213 | spider_net_rx_irq_off(struct spider_net_card *card) |
aaec0fab JO |
214 | { |
215 | u32 regvalue; | |
aaec0fab | 216 | |
11f1a52b AB |
217 | regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); |
218 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
219 | } |
220 | ||
221 | /** | |
11f1a52b | 222 | * spider_net_rx_irq_on - switch on rx irq on this spider card |
aaec0fab JO |
223 | * @card: device structure |
224 | * | |
11f1a52b | 225 | * switches on rx irq by enabling them in the GHIINTnMSK register |
aaec0fab JO |
226 | */ |
227 | static void | |
11f1a52b | 228 | spider_net_rx_irq_on(struct spider_net_card *card) |
aaec0fab JO |
229 | { |
230 | u32 regvalue; | |
aaec0fab | 231 | |
11f1a52b AB |
232 | regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; |
233 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
234 | } |
235 | ||
236 | /** | |
237 | * spider_net_set_promisc - sets the unicast address or the promiscuous mode | |
238 | * @card: card structure | |
239 | * | |
240 | * spider_net_set_promisc sets the unicast destination address filter and | |
241 | * thus either allows for non-promisc mode or promisc mode | |
242 | */ | |
243 | static void | |
244 | spider_net_set_promisc(struct spider_net_card *card) | |
245 | { | |
246 | u32 macu, macl; | |
247 | struct net_device *netdev = card->netdev; | |
248 | ||
249 | if (netdev->flags & IFF_PROMISC) { | |
250 | /* clear destination entry 0 */ | |
251 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); | |
252 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); | |
253 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
254 | SPIDER_NET_PROMISC_VALUE); | |
255 | } else { | |
256 | macu = netdev->dev_addr[0]; | |
257 | macu <<= 8; | |
258 | macu |= netdev->dev_addr[1]; | |
259 | memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); | |
260 | ||
261 | macu |= SPIDER_NET_UA_DESCR_VALUE; | |
262 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); | |
263 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); | |
264 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
265 | SPIDER_NET_NONPROMISC_VALUE); | |
266 | } | |
267 | } | |
268 | ||
269 | /** | |
270 | * spider_net_get_mac_address - read mac address from spider card | |
271 | * @card: device structure | |
272 | * | |
273 | * reads MAC address from GMACUNIMACU and GMACUNIMACL registers | |
274 | */ | |
275 | static int | |
276 | spider_net_get_mac_address(struct net_device *netdev) | |
277 | { | |
278 | struct spider_net_card *card = netdev_priv(netdev); | |
279 | u32 macl, macu; | |
280 | ||
281 | macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL); | |
282 | macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU); | |
283 | ||
284 | netdev->dev_addr[0] = (macu >> 24) & 0xff; | |
285 | netdev->dev_addr[1] = (macu >> 16) & 0xff; | |
286 | netdev->dev_addr[2] = (macu >> 8) & 0xff; | |
287 | netdev->dev_addr[3] = macu & 0xff; | |
288 | netdev->dev_addr[4] = (macl >> 8) & 0xff; | |
289 | netdev->dev_addr[5] = macl & 0xff; | |
290 | ||
291 | if (!is_valid_ether_addr(&netdev->dev_addr[0])) | |
292 | return -EINVAL; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | /** | |
298 | * spider_net_get_descr_status -- returns the status of a descriptor | |
299 | * @descr: descriptor to look at | |
300 | * | |
301 | * returns the status as in the dmac_cmd_status field of the descriptor | |
302 | */ | |
bdd01503 | 303 | static inline int |
4cb6f9e5 | 304 | spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) |
aaec0fab | 305 | { |
4cb6f9e5 | 306 | return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; |
aaec0fab JO |
307 | } |
308 | ||
309 | /** | |
310 | * spider_net_free_chain - free descriptor chain | |
311 | * @card: card structure | |
312 | * @chain: address of chain | |
313 | * | |
314 | */ | |
315 | static void | |
316 | spider_net_free_chain(struct spider_net_card *card, | |
317 | struct spider_net_descr_chain *chain) | |
318 | { | |
319 | struct spider_net_descr *descr; | |
320 | ||
d4ed8f8d LV |
321 | descr = chain->ring; |
322 | do { | |
aaec0fab | 323 | descr->bus_addr = 0; |
4cb6f9e5 | 324 | descr->hwdescr->next_descr_addr = 0; |
d4ed8f8d LV |
325 | descr = descr->next; |
326 | } while (descr != chain->ring); | |
327 | ||
328 | dma_free_coherent(&card->pdev->dev, chain->num_desc, | |
4cb6f9e5 | 329 | chain->hwring, chain->dma_addr); |
aaec0fab JO |
330 | } |
331 | ||
332 | /** | |
d4ed8f8d | 333 | * spider_net_init_chain - alloc and link descriptor chain |
aaec0fab JO |
334 | * @card: card structure |
335 | * @chain: address of chain | |
aaec0fab | 336 | * |
d4ed8f8d | 337 | * We manage a circular list that mirrors the hardware structure, |
aaec0fab JO |
338 | * except that the hardware uses bus addresses. |
339 | * | |
d4ed8f8d | 340 | * Returns 0 on success, <0 on failure |
aaec0fab JO |
341 | */ |
342 | static int | |
343 | spider_net_init_chain(struct spider_net_card *card, | |
d4ed8f8d | 344 | struct spider_net_descr_chain *chain) |
aaec0fab JO |
345 | { |
346 | int i; | |
347 | struct spider_net_descr *descr; | |
4cb6f9e5 | 348 | struct spider_net_hw_descr *hwdescr; |
11f1a52b | 349 | dma_addr_t buf; |
d4ed8f8d | 350 | size_t alloc_size; |
aaec0fab | 351 | |
4cb6f9e5 | 352 | alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); |
aaec0fab | 353 | |
4cb6f9e5 | 354 | chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, |
1f9061d2 | 355 | &chain->dma_addr, GFP_KERNEL); |
4cb6f9e5 | 356 | if (!chain->hwring) |
d4ed8f8d | 357 | return -ENOMEM; |
aaec0fab | 358 | |
4cb6f9e5 | 359 | memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr)); |
d4ed8f8d LV |
360 | |
361 | /* Set up the hardware pointers in each descriptor */ | |
4cb6f9e5 LV |
362 | descr = chain->ring; |
363 | hwdescr = chain->hwring; | |
d4ed8f8d | 364 | buf = chain->dma_addr; |
4cb6f9e5 LV |
365 | for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { |
366 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; | |
367 | hwdescr->next_descr_addr = 0; | |
aaec0fab | 368 | |
4cb6f9e5 | 369 | descr->hwdescr = hwdescr; |
11f1a52b | 370 | descr->bus_addr = buf; |
aaec0fab JO |
371 | descr->next = descr + 1; |
372 | descr->prev = descr - 1; | |
373 | ||
4cb6f9e5 | 374 | buf += sizeof(struct spider_net_hw_descr); |
aaec0fab JO |
375 | } |
376 | /* do actual circular list */ | |
d4ed8f8d LV |
377 | (descr-1)->next = chain->ring; |
378 | chain->ring->prev = descr-1; | |
aaec0fab | 379 | |
bdd01503 | 380 | spin_lock_init(&chain->lock); |
d4ed8f8d LV |
381 | chain->head = chain->ring; |
382 | chain->tail = chain->ring; | |
aaec0fab | 383 | return 0; |
aaec0fab JO |
384 | } |
385 | ||
386 | /** | |
387 | * spider_net_free_rx_chain_contents - frees descr contents in rx chain | |
388 | * @card: card structure | |
389 | * | |
390 | * returns 0 on success, <0 on failure | |
391 | */ | |
392 | static void | |
393 | spider_net_free_rx_chain_contents(struct spider_net_card *card) | |
394 | { | |
395 | struct spider_net_descr *descr; | |
396 | ||
397 | descr = card->rx_chain.head; | |
64751910 | 398 | do { |
aaec0fab | 399 | if (descr->skb) { |
4cb6f9e5 | 400 | pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, |
11f1a52b | 401 | SPIDER_NET_MAX_FRAME, |
348bc2a6 | 402 | PCI_DMA_BIDIRECTIONAL); |
d9c199ee LV |
403 | dev_kfree_skb(descr->skb); |
404 | descr->skb = NULL; | |
aaec0fab JO |
405 | } |
406 | descr = descr->next; | |
64751910 | 407 | } while (descr != card->rx_chain.head); |
aaec0fab JO |
408 | } |
409 | ||
410 | /** | |
a4182c50 | 411 | * spider_net_prepare_rx_descr - Reinitialize RX descriptor |
aaec0fab JO |
412 | * @card: card structure |
413 | * @descr: descriptor to re-init | |
414 | * | |
af901ca1 | 415 | * Return 0 on success, <0 on failure. |
aaec0fab | 416 | * |
a4182c50 LV |
417 | * Allocates a new rx skb, iommu-maps it and attaches it to the |
418 | * descriptor. Mark the descriptor as activated, ready-to-use. | |
aaec0fab JO |
419 | */ |
420 | static int | |
421 | spider_net_prepare_rx_descr(struct spider_net_card *card, | |
422 | struct spider_net_descr *descr) | |
423 | { | |
4cb6f9e5 | 424 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
8e0a613b | 425 | dma_addr_t buf; |
aaec0fab JO |
426 | int offset; |
427 | int bufsize; | |
428 | ||
429 | /* we need to round up the buffer size to a multiple of 128 */ | |
11f1a52b | 430 | bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & |
aaec0fab JO |
431 | (~(SPIDER_NET_RXBUF_ALIGN - 1)); |
432 | ||
433 | /* and we need to have it 128 byte aligned, therefore we allocate a | |
434 | * bit more */ | |
435 | /* allocate an skb */ | |
98739407 CH |
436 | descr->skb = netdev_alloc_skb(card->netdev, |
437 | bufsize + SPIDER_NET_RXBUF_ALIGN - 1); | |
aaec0fab | 438 | if (!descr->skb) { |
11f1a52b | 439 | if (netif_msg_rx_err(card) && net_ratelimit()) |
e6311d85 LV |
440 | dev_err(&card->netdev->dev, |
441 | "Not enough memory to allocate rx buffer\n"); | |
9b6b0b81 | 442 | card->spider_stats.alloc_rx_skb_error++; |
aaec0fab JO |
443 | return -ENOMEM; |
444 | } | |
4cb6f9e5 LV |
445 | hwdescr->buf_size = bufsize; |
446 | hwdescr->result_size = 0; | |
447 | hwdescr->valid_size = 0; | |
448 | hwdescr->data_status = 0; | |
449 | hwdescr->data_error = 0; | |
aaec0fab JO |
450 | |
451 | offset = ((unsigned long)descr->skb->data) & | |
452 | (SPIDER_NET_RXBUF_ALIGN - 1); | |
453 | if (offset) | |
454 | skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); | |
a4182c50 | 455 | /* iommu-map the skb */ |
8e0a613b | 456 | buf = pci_map_single(card->pdev, descr->skb->data, |
bdd01503 | 457 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
8d8bb39b | 458 | if (pci_dma_mapping_error(card->pdev, buf)) { |
aaec0fab | 459 | dev_kfree_skb_any(descr->skb); |
d9c199ee | 460 | descr->skb = NULL; |
11f1a52b | 461 | if (netif_msg_rx_err(card) && net_ratelimit()) |
e6311d85 | 462 | dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n"); |
9b6b0b81 | 463 | card->spider_stats.rx_iommu_map_error++; |
4cb6f9e5 | 464 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
aaec0fab | 465 | } else { |
4cb6f9e5 | 466 | hwdescr->buf_addr = buf; |
90476a20 | 467 | wmb(); |
4cb6f9e5 | 468 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | |
bdd01503 | 469 | SPIDER_NET_DMAC_NOINTR_COMPLETE; |
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 | * | |
3ad2f3fb | 479 | * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses 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 | ||
59a11f88 LV |
506 | /** |
507 | * spider_net_disable_rxdmac - disables the receive DMA controller | |
508 | * @card: card structure | |
509 | * | |
510 | * spider_net_disable_rxdmac terminates processing on the DMA controller | |
511 | * by turing off the DMA controller, with the force-end flag set. | |
512 | */ | |
513 | static inline void | |
514 | spider_net_disable_rxdmac(struct spider_net_card *card) | |
515 | { | |
516 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
517 | SPIDER_NET_DMA_RX_FEND_VALUE); | |
518 | } | |
519 | ||
aaec0fab JO |
520 | /** |
521 | * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains | |
522 | * @card: card structure | |
523 | * | |
11f1a52b | 524 | * refills descriptors in the rx chain: allocates skbs and iommu-maps them. |
aaec0fab JO |
525 | */ |
526 | static void | |
527 | spider_net_refill_rx_chain(struct spider_net_card *card) | |
528 | { | |
bdd01503 JO |
529 | struct spider_net_descr_chain *chain = &card->rx_chain; |
530 | unsigned long flags; | |
aaec0fab | 531 | |
11f1a52b AB |
532 | /* one context doing the refill (and a second context seeing that |
533 | * and omitting it) is ok. If called by NAPI, we'll be called again | |
534 | * as spider_net_decode_one_descr is called several times. If some | |
535 | * interrupt calls us, the NAPI is about to clean up anyway. */ | |
bdd01503 JO |
536 | if (!spin_trylock_irqsave(&chain->lock, flags)) |
537 | return; | |
538 | ||
4cb6f9e5 | 539 | while (spider_net_get_descr_status(chain->head->hwdescr) == |
bdd01503 JO |
540 | SPIDER_NET_DESCR_NOT_IN_USE) { |
541 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
542 | break; | |
543 | chain->head = chain->head->next; | |
544 | } | |
aaec0fab | 545 | |
bdd01503 | 546 | spin_unlock_irqrestore(&chain->lock, flags); |
aaec0fab JO |
547 | } |
548 | ||
549 | /** | |
2c307db7 | 550 | * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains |
aaec0fab JO |
551 | * @card: card structure |
552 | * | |
2c307db7 | 553 | * Returns 0 on success, <0 on failure. |
aaec0fab JO |
554 | */ |
555 | static int | |
556 | spider_net_alloc_rx_skbs(struct spider_net_card *card) | |
557 | { | |
2bf27a0d LV |
558 | struct spider_net_descr_chain *chain = &card->rx_chain; |
559 | struct spider_net_descr *start = chain->tail; | |
560 | struct spider_net_descr *descr = start; | |
aaec0fab | 561 | |
2bf27a0d LV |
562 | /* Link up the hardware chain pointers */ |
563 | do { | |
564 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; | |
565 | descr = descr->next; | |
566 | } while (descr != start); | |
aaec0fab | 567 | |
2c307db7 LV |
568 | /* Put at least one buffer into the chain. if this fails, |
569 | * we've got a problem. If not, spider_net_refill_rx_chain | |
570 | * will do the rest at the end of this function. */ | |
aaec0fab JO |
571 | if (spider_net_prepare_rx_descr(card, chain->head)) |
572 | goto error; | |
573 | else | |
574 | chain->head = chain->head->next; | |
575 | ||
2c307db7 LV |
576 | /* This will allocate the rest of the rx buffers; |
577 | * if not, it's business as usual later on. */ | |
aaec0fab | 578 | spider_net_refill_rx_chain(card); |
11f1a52b | 579 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
580 | return 0; |
581 | ||
582 | error: | |
583 | spider_net_free_rx_chain_contents(card); | |
2bf27a0d | 584 | return -ENOMEM; |
aaec0fab JO |
585 | } |
586 | ||
aaec0fab JO |
587 | /** |
588 | * spider_net_get_multicast_hash - generates hash for multicast filter table | |
589 | * @addr: multicast address | |
590 | * | |
591 | * returns the hash value. | |
592 | * | |
593 | * spider_net_get_multicast_hash calculates a hash value for a given multicast | |
594 | * address, that is used to set the multicast filter tables | |
595 | */ | |
596 | static u8 | |
597 | spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) | |
598 | { | |
aaec0fab JO |
599 | u32 crc; |
600 | u8 hash; | |
11f1a52b AB |
601 | char addr_for_crc[ETH_ALEN] = { 0, }; |
602 | int i, bit; | |
603 | ||
604 | for (i = 0; i < ETH_ALEN * 8; i++) { | |
605 | bit = (addr[i / 8] >> (i % 8)) & 1; | |
606 | addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); | |
607 | } | |
aaec0fab | 608 | |
11f1a52b | 609 | crc = crc32_be(~0, addr_for_crc, netdev->addr_len); |
aaec0fab JO |
610 | |
611 | hash = (crc >> 27); | |
612 | hash <<= 3; | |
613 | hash |= crc & 7; | |
11f1a52b | 614 | hash &= 0xff; |
aaec0fab JO |
615 | |
616 | return hash; | |
617 | } | |
618 | ||
619 | /** | |
620 | * spider_net_set_multi - sets multicast addresses and promisc flags | |
621 | * @netdev: interface device structure | |
622 | * | |
623 | * spider_net_set_multi configures multicast addresses as needed for the | |
624 | * netdev interface. It also sets up multicast, allmulti and promisc | |
625 | * flags appropriately | |
626 | */ | |
627 | static void | |
628 | spider_net_set_multi(struct net_device *netdev) | |
629 | { | |
22bedad3 | 630 | struct netdev_hw_addr *ha; |
aaec0fab JO |
631 | u8 hash; |
632 | int i; | |
633 | u32 reg; | |
634 | struct spider_net_card *card = netdev_priv(netdev); | |
635 | unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = | |
636 | {0, }; | |
637 | ||
638 | spider_net_set_promisc(card); | |
639 | ||
640 | if (netdev->flags & IFF_ALLMULTI) { | |
641 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { | |
642 | set_bit(i, bitmask); | |
643 | } | |
644 | goto write_hash; | |
645 | } | |
646 | ||
647 | /* well, we know, what the broadcast hash value is: it's xfd | |
648 | hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ | |
649 | set_bit(0xfd, bitmask); | |
650 | ||
22bedad3 JP |
651 | netdev_for_each_mc_addr(ha, netdev) { |
652 | hash = spider_net_get_multicast_hash(netdev, ha->addr); | |
aaec0fab JO |
653 | set_bit(hash, bitmask); |
654 | } | |
655 | ||
656 | write_hash: | |
657 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { | |
658 | reg = 0; | |
659 | if (test_bit(i * 4, bitmask)) | |
660 | reg += 0x08; | |
661 | reg <<= 8; | |
662 | if (test_bit(i * 4 + 1, bitmask)) | |
663 | reg += 0x08; | |
664 | reg <<= 8; | |
665 | if (test_bit(i * 4 + 2, bitmask)) | |
666 | reg += 0x08; | |
667 | reg <<= 8; | |
668 | if (test_bit(i * 4 + 3, bitmask)) | |
669 | reg += 0x08; | |
670 | ||
671 | spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); | |
672 | } | |
673 | } | |
674 | ||
aaec0fab JO |
675 | /** |
676 | * spider_net_prepare_tx_descr - fill tx descriptor with skb data | |
677 | * @card: card structure | |
aaec0fab JO |
678 | * @skb: packet to use |
679 | * | |
680 | * returns 0 on success, <0 on failure. | |
681 | * | |
682 | * fills out the descriptor structure with skb data and len. Copies data, | |
683 | * if needed (32bit DMA!) | |
684 | */ | |
685 | static int | |
686 | spider_net_prepare_tx_descr(struct spider_net_card *card, | |
aaec0fab JO |
687 | struct sk_buff *skb) |
688 | { | |
d9c199ee | 689 | struct spider_net_descr_chain *chain = &card->tx_chain; |
9cc7bf7e | 690 | struct spider_net_descr *descr; |
4cb6f9e5 | 691 | struct spider_net_hw_descr *hwdescr; |
11f1a52b | 692 | dma_addr_t buf; |
9cc7bf7e | 693 | unsigned long flags; |
11f1a52b | 694 | |
9c434f5e | 695 | buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); |
8d8bb39b | 696 | if (pci_dma_mapping_error(card->pdev, buf)) { |
11f1a52b | 697 | if (netif_msg_tx_err(card) && net_ratelimit()) |
e6311d85 | 698 | dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). " |
9c434f5e | 699 | "Dropping packet\n", skb->data, skb->len); |
9b6b0b81 | 700 | card->spider_stats.tx_iommu_map_error++; |
aaec0fab JO |
701 | return -ENOMEM; |
702 | } | |
703 | ||
d9c199ee | 704 | spin_lock_irqsave(&chain->lock, flags); |
9cc7bf7e | 705 | descr = card->tx_chain.head; |
d9c199ee LV |
706 | if (descr->next == chain->tail->prev) { |
707 | spin_unlock_irqrestore(&chain->lock, flags); | |
708 | pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); | |
709 | return -ENOMEM; | |
710 | } | |
4cb6f9e5 | 711 | hwdescr = descr->hwdescr; |
d9c199ee | 712 | chain->head = descr->next; |
9cc7bf7e | 713 | |
aaec0fab | 714 | descr->skb = skb; |
4cb6f9e5 LV |
715 | hwdescr->buf_addr = buf; |
716 | hwdescr->buf_size = skb->len; | |
717 | hwdescr->next_descr_addr = 0; | |
718 | hwdescr->data_status = 0; | |
aaec0fab | 719 | |
4cb6f9e5 | 720 | hwdescr->dmac_cmd_status = |
5f309b90 | 721 | SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL; |
d9c199ee | 722 | spin_unlock_irqrestore(&chain->lock, flags); |
9cc7bf7e | 723 | |
3a2c892d | 724 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
eddc9ec5 | 725 | switch (ip_hdr(skb)->protocol) { |
bdd01503 | 726 | case IPPROTO_TCP: |
4cb6f9e5 | 727 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; |
bdd01503 JO |
728 | break; |
729 | case IPPROTO_UDP: | |
4cb6f9e5 | 730 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; |
bdd01503 JO |
731 | break; |
732 | } | |
733 | ||
204e5fa1 | 734 | /* Chain the bus address, so that the DMA engine finds this descr. */ |
4cb6f9e5 LV |
735 | wmb(); |
736 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; | |
bdd01503 | 737 | |
917a5b8e | 738 | card->netdev->trans_start = jiffies; /* set netdev watchdog timer */ |
bdd01503 JO |
739 | return 0; |
740 | } | |
741 | ||
a664ccf4 | 742 | static int |
204e5fa1 LV |
743 | spider_net_set_low_watermark(struct spider_net_card *card) |
744 | { | |
4cb6f9e5 LV |
745 | struct spider_net_descr *descr = card->tx_chain.tail; |
746 | struct spider_net_hw_descr *hwdescr; | |
9cc7bf7e | 747 | unsigned long flags; |
204e5fa1 LV |
748 | int status; |
749 | int cnt=0; | |
750 | int i; | |
204e5fa1 | 751 | |
9cc7bf7e LV |
752 | /* Measure the length of the queue. Measurement does not |
753 | * need to be precise -- does not need a lock. */ | |
204e5fa1 | 754 | while (descr != card->tx_chain.head) { |
4cb6f9e5 | 755 | status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; |
204e5fa1 LV |
756 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) |
757 | break; | |
758 | descr = descr->next; | |
759 | cnt++; | |
760 | } | |
761 | ||
762 | /* If TX queue is short, don't even bother with interrupts */ | |
d4ed8f8d | 763 | if (cnt < card->tx_chain.num_desc/4) |
a664ccf4 | 764 | return cnt; |
204e5fa1 LV |
765 | |
766 | /* Set low-watermark 3/4th's of the way into the queue. */ | |
767 | descr = card->tx_chain.tail; | |
768 | cnt = (cnt*3)/4; | |
769 | for (i=0;i<cnt; i++) | |
770 | descr = descr->next; | |
771 | ||
772 | /* Set the new watermark, clear the old watermark */ | |
9cc7bf7e | 773 | spin_lock_irqsave(&card->tx_chain.lock, flags); |
4cb6f9e5 LV |
774 | descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; |
775 | if (card->low_watermark && card->low_watermark != descr) { | |
776 | hwdescr = card->low_watermark->hwdescr; | |
777 | hwdescr->dmac_cmd_status = | |
778 | hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; | |
779 | } | |
204e5fa1 | 780 | card->low_watermark = descr; |
9cc7bf7e | 781 | spin_unlock_irqrestore(&card->tx_chain.lock, flags); |
a664ccf4 | 782 | return cnt; |
204e5fa1 LV |
783 | } |
784 | ||
bdd01503 JO |
785 | /** |
786 | * spider_net_release_tx_chain - processes sent tx descriptors | |
787 | * @card: adapter structure | |
788 | * @brutal: if set, don't care about whether descriptor seems to be in use | |
789 | * | |
790 | * returns 0 if the tx ring is empty, otherwise 1. | |
791 | * | |
792 | * spider_net_release_tx_chain releases the tx descriptors that spider has | |
793 | * finished with (if non-brutal) or simply release tx descriptors (if brutal). | |
794 | * If some other context is calling this function, we return 1 so that we're | |
26aca5ec | 795 | * scheduled again (if we were scheduled) and will not lose initiative. |
bdd01503 JO |
796 | */ |
797 | static int | |
798 | spider_net_release_tx_chain(struct spider_net_card *card, int brutal) | |
799 | { | |
09f75cd7 | 800 | struct net_device *dev = card->netdev; |
bdd01503 | 801 | struct spider_net_descr_chain *chain = &card->tx_chain; |
9cc7bf7e | 802 | struct spider_net_descr *descr; |
4cb6f9e5 | 803 | struct spider_net_hw_descr *hwdescr; |
9cc7bf7e LV |
804 | struct sk_buff *skb; |
805 | u32 buf_addr; | |
806 | unsigned long flags; | |
bdd01503 JO |
807 | int status; |
808 | ||
5c8e98fe | 809 | while (1) { |
9cc7bf7e | 810 | spin_lock_irqsave(&chain->lock, flags); |
5c8e98fe LV |
811 | if (chain->tail == chain->head) { |
812 | spin_unlock_irqrestore(&chain->lock, flags); | |
813 | return 0; | |
814 | } | |
9cc7bf7e | 815 | descr = chain->tail; |
4cb6f9e5 | 816 | hwdescr = descr->hwdescr; |
9cc7bf7e | 817 | |
4cb6f9e5 | 818 | status = spider_net_get_descr_status(hwdescr); |
bdd01503 JO |
819 | switch (status) { |
820 | case SPIDER_NET_DESCR_COMPLETE: | |
09f75cd7 JG |
821 | dev->stats.tx_packets++; |
822 | dev->stats.tx_bytes += descr->skb->len; | |
bdd01503 JO |
823 | break; |
824 | ||
825 | case SPIDER_NET_DESCR_CARDOWNED: | |
9cc7bf7e LV |
826 | if (!brutal) { |
827 | spin_unlock_irqrestore(&chain->lock, flags); | |
bdd01503 | 828 | return 1; |
9cc7bf7e LV |
829 | } |
830 | ||
bdd01503 JO |
831 | /* fallthrough, if we release the descriptors |
832 | * brutally (then we don't care about | |
833 | * SPIDER_NET_DESCR_CARDOWNED) */ | |
834 | ||
835 | case SPIDER_NET_DESCR_RESPONSE_ERROR: | |
836 | case SPIDER_NET_DESCR_PROTECTION_ERROR: | |
837 | case SPIDER_NET_DESCR_FORCE_END: | |
838 | if (netif_msg_tx_err(card)) | |
e6311d85 LV |
839 | dev_err(&card->netdev->dev, "forcing end of tx descriptor " |
840 | "with status x%02x\n", status); | |
09f75cd7 | 841 | dev->stats.tx_errors++; |
bdd01503 JO |
842 | break; |
843 | ||
844 | default: | |
09f75cd7 | 845 | dev->stats.tx_dropped++; |
9cc7bf7e LV |
846 | if (!brutal) { |
847 | spin_unlock_irqrestore(&chain->lock, flags); | |
c3fee4c5 | 848 | return 1; |
9cc7bf7e | 849 | } |
bdd01503 | 850 | } |
aaec0fab | 851 | |
9cc7bf7e | 852 | chain->tail = descr->next; |
4cb6f9e5 | 853 | hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; |
9cc7bf7e | 854 | skb = descr->skb; |
d9c199ee | 855 | descr->skb = NULL; |
4cb6f9e5 | 856 | buf_addr = hwdescr->buf_addr; |
9cc7bf7e LV |
857 | spin_unlock_irqrestore(&chain->lock, flags); |
858 | ||
859 | /* unmap the skb */ | |
860 | if (skb) { | |
9c434f5e JL |
861 | pci_unmap_single(card->pdev, buf_addr, skb->len, |
862 | PCI_DMA_TODEVICE); | |
20eca054 | 863 | dev_consume_skb_any(skb); |
9cc7bf7e LV |
864 | } |
865 | } | |
aaec0fab JO |
866 | return 0; |
867 | } | |
868 | ||
869 | /** | |
870 | * spider_net_kick_tx_dma - enables TX DMA processing | |
871 | * @card: card structure | |
aaec0fab | 872 | * |
a664ccf4 LV |
873 | * This routine will start the transmit DMA running if |
874 | * it is not already running. This routine ned only be | |
875 | * called when queueing a new packet to an empty tx queue. | |
876 | * Writes the current tx chain head as start address | |
877 | * of the tx descriptor chain and enables the transmission | |
878 | * DMA engine. | |
aaec0fab | 879 | */ |
bdd01503 JO |
880 | static inline void |
881 | spider_net_kick_tx_dma(struct spider_net_card *card) | |
aaec0fab | 882 | { |
bdd01503 | 883 | struct spider_net_descr *descr; |
aaec0fab | 884 | |
bdd01503 JO |
885 | if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & |
886 | SPIDER_NET_TX_DMA_EN) | |
887 | goto out; | |
aaec0fab | 888 | |
bdd01503 JO |
889 | descr = card->tx_chain.tail; |
890 | for (;;) { | |
4cb6f9e5 | 891 | if (spider_net_get_descr_status(descr->hwdescr) == |
bdd01503 JO |
892 | SPIDER_NET_DESCR_CARDOWNED) { |
893 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
894 | descr->bus_addr); | |
895 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
896 | SPIDER_NET_DMA_TX_VALUE); | |
897 | break; | |
898 | } | |
899 | if (descr == card->tx_chain.head) | |
900 | break; | |
901 | descr = descr->next; | |
902 | } | |
903 | ||
904 | out: | |
905 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); | |
aaec0fab JO |
906 | } |
907 | ||
908 | /** | |
909 | * spider_net_xmit - transmits a frame over the device | |
910 | * @skb: packet to send out | |
911 | * @netdev: interface device structure | |
912 | * | |
bdd01503 | 913 | * returns 0 on success, !0 on failure |
aaec0fab JO |
914 | */ |
915 | static int | |
916 | spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) | |
917 | { | |
a664ccf4 | 918 | int cnt; |
aaec0fab | 919 | struct spider_net_card *card = netdev_priv(netdev); |
bdd01503 | 920 | |
11f1a52b | 921 | spider_net_release_tx_chain(card, 0); |
aaec0fab | 922 | |
d9c199ee | 923 | if (spider_net_prepare_tx_descr(card, skb) != 0) { |
09f75cd7 | 924 | netdev->stats.tx_dropped++; |
313ef4b7 LV |
925 | netif_stop_queue(netdev); |
926 | return NETDEV_TX_BUSY; | |
bdd01503 | 927 | } |
aaec0fab | 928 | |
a664ccf4 LV |
929 | cnt = spider_net_set_low_watermark(card); |
930 | if (cnt < 5) | |
931 | spider_net_kick_tx_dma(card); | |
313ef4b7 | 932 | return NETDEV_TX_OK; |
bdd01503 | 933 | } |
11f1a52b | 934 | |
bdd01503 JO |
935 | /** |
936 | * spider_net_cleanup_tx_ring - cleans up the TX ring | |
937 | * @card: card structure | |
938 | * | |
68a8c609 LV |
939 | * spider_net_cleanup_tx_ring is called by either the tx_timer |
940 | * or from the NAPI polling routine. | |
941 | * This routine releases resources associted with transmitted | |
942 | * packets, including updating the queue tail pointer. | |
bdd01503 JO |
943 | */ |
944 | static void | |
945 | spider_net_cleanup_tx_ring(struct spider_net_card *card) | |
946 | { | |
bdd01503 | 947 | if ((spider_net_release_tx_chain(card, 0) != 0) && |
313ef4b7 | 948 | (card->netdev->flags & IFF_UP)) { |
bdd01503 | 949 | spider_net_kick_tx_dma(card); |
313ef4b7 LV |
950 | netif_wake_queue(card->netdev); |
951 | } | |
aaec0fab JO |
952 | } |
953 | ||
954 | /** | |
955 | * spider_net_do_ioctl - called for device ioctls | |
956 | * @netdev: interface device structure | |
957 | * @ifr: request parameter structure for ioctl | |
958 | * @cmd: command code for ioctl | |
959 | * | |
960 | * returns 0 on success, <0 on failure. Currently, we have no special ioctls. | |
961 | * -EOPNOTSUPP is returned, if an unknown ioctl was requested | |
962 | */ | |
963 | static int | |
964 | spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
965 | { | |
966 | switch (cmd) { | |
967 | default: | |
968 | return -EOPNOTSUPP; | |
969 | } | |
970 | } | |
971 | ||
972 | /** | |
973 | * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on | |
974 | * @descr: descriptor to process | |
975 | * @card: card structure | |
976 | * | |
05b346b5 LV |
977 | * Fills out skb structure and passes the data to the stack. |
978 | * The descriptor state is not changed. | |
aaec0fab | 979 | */ |
7f7223b8 | 980 | static void |
aaec0fab | 981 | spider_net_pass_skb_up(struct spider_net_descr *descr, |
1cd173f6 | 982 | struct spider_net_card *card) |
aaec0fab | 983 | { |
09f75cd7 JG |
984 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
985 | struct sk_buff *skb = descr->skb; | |
986 | struct net_device *netdev = card->netdev; | |
987 | u32 data_status = hwdescr->data_status; | |
988 | u32 data_error = hwdescr->data_error; | |
aaec0fab | 989 | |
4cb6f9e5 | 990 | skb_put(skb, hwdescr->valid_size); |
aaec0fab JO |
991 | |
992 | /* the card seems to add 2 bytes of junk in front | |
993 | * of the ethernet frame */ | |
994 | #define SPIDER_MISALIGN 2 | |
995 | skb_pull(skb, SPIDER_MISALIGN); | |
996 | skb->protocol = eth_type_trans(skb, netdev); | |
997 | ||
998 | /* checksum offload */ | |
6de240b7 MM |
999 | skb_checksum_none_assert(skb); |
1000 | if (netdev->features & NETIF_F_RXCSUM) { | |
11f1a52b AB |
1001 | if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == |
1002 | SPIDER_NET_DATA_STATUS_CKSUM_MASK) && | |
1003 | !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) | |
aaec0fab | 1004 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
6de240b7 | 1005 | } |
aaec0fab JO |
1006 | |
1007 | if (data_status & SPIDER_NET_VLAN_PACKET) { | |
9c5d0614 | 1008 | /* further enhancements: HW-accel VLAN */ |
aaec0fab JO |
1009 | } |
1010 | ||
aaec0fab | 1011 | /* update netdevice statistics */ |
09f75cd7 JG |
1012 | netdev->stats.rx_packets++; |
1013 | netdev->stats.rx_bytes += skb->len; | |
93c1d3b7 FM |
1014 | |
1015 | /* pass skb up to stack */ | |
1016 | netif_receive_skb(skb); | |
aaec0fab JO |
1017 | } |
1018 | ||
6d24998f LV |
1019 | static void show_rx_chain(struct spider_net_card *card) |
1020 | { | |
1021 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1022 | struct spider_net_descr *start= chain->tail; | |
1023 | struct spider_net_descr *descr= start; | |
9948357d LV |
1024 | struct spider_net_hw_descr *hwd = start->hwdescr; |
1025 | struct device *dev = &card->netdev->dev; | |
1026 | u32 curr_desc, next_desc; | |
6d24998f LV |
1027 | int status; |
1028 | ||
9948357d | 1029 | int tot = 0; |
6d24998f | 1030 | int cnt = 0; |
9948357d LV |
1031 | int off = start - chain->ring; |
1032 | int cstat = hwd->dmac_cmd_status; | |
1033 | ||
1034 | dev_info(dev, "Total number of descrs=%d\n", | |
1035 | chain->num_desc); | |
1036 | dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n", | |
1037 | off, cstat); | |
1038 | ||
1039 | curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA); | |
1040 | next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA); | |
1041 | ||
6d24998f LV |
1042 | status = cstat; |
1043 | do | |
1044 | { | |
9948357d LV |
1045 | hwd = descr->hwdescr; |
1046 | off = descr - chain->ring; | |
1047 | status = hwd->dmac_cmd_status; | |
1048 | ||
1049 | if (descr == chain->head) | |
1050 | dev_info(dev, "Chain head is at %d, head status=0x%x\n", | |
1051 | off, status); | |
1052 | ||
1053 | if (curr_desc == descr->bus_addr) | |
1054 | dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n", | |
1055 | off, status); | |
1056 | ||
1057 | if (next_desc == descr->bus_addr) | |
1058 | dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n", | |
1059 | off, status); | |
1060 | ||
1061 | if (hwd->next_descr_addr == 0) | |
1062 | dev_info(dev, "chain is cut at %d\n", off); | |
1063 | ||
6d24998f | 1064 | if (cstat != status) { |
9948357d LV |
1065 | int from = (chain->num_desc + off - cnt) % chain->num_desc; |
1066 | int to = (chain->num_desc + off - 1) % chain->num_desc; | |
1067 | dev_info(dev, "Have %d (from %d to %d) descrs " | |
1068 | "with stat=0x%08x\n", cnt, from, to, cstat); | |
6d24998f LV |
1069 | cstat = status; |
1070 | cnt = 0; | |
1071 | } | |
9948357d | 1072 | |
6d24998f | 1073 | cnt ++; |
9948357d LV |
1074 | tot ++; |
1075 | descr = descr->next; | |
1076 | } while (descr != start); | |
1077 | ||
1078 | dev_info(dev, "Last %d descrs with stat=0x%08x " | |
1079 | "for a total of %d descrs\n", cnt, cstat, tot); | |
1080 | ||
1081 | #ifdef DEBUG | |
1082 | /* Now dump the whole ring */ | |
1083 | descr = start; | |
1084 | do | |
1085 | { | |
1086 | struct spider_net_hw_descr *hwd = descr->hwdescr; | |
1087 | status = spider_net_get_descr_status(hwd); | |
1088 | cnt = descr - chain->ring; | |
1089 | dev_info(dev, "Descr %d stat=0x%08x skb=%p\n", | |
1090 | cnt, status, descr->skb); | |
1091 | dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n", | |
1092 | descr->bus_addr, hwd->buf_addr, hwd->buf_size); | |
1093 | dev_info(dev, "next=%08x result sz=%d valid sz=%d\n", | |
1094 | hwd->next_descr_addr, hwd->result_size, | |
1095 | hwd->valid_size); | |
1096 | dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n", | |
1097 | hwd->dmac_cmd_status, hwd->data_status, | |
1098 | hwd->data_error); | |
1099 | dev_info(dev, "\n"); | |
1100 | ||
6d24998f LV |
1101 | descr = descr->next; |
1102 | } while (descr != start); | |
6d24998f LV |
1103 | #endif |
1104 | ||
9948357d LV |
1105 | } |
1106 | ||
4c4bd5a9 LV |
1107 | /** |
1108 | * spider_net_resync_head_ptr - Advance head ptr past empty descrs | |
1109 | * | |
1110 | * If the driver fails to keep up and empty the queue, then the | |
1111 | * hardware wil run out of room to put incoming packets. This | |
1112 | * will cause the hardware to skip descrs that are full (instead | |
1113 | * of halting/retrying). Thus, once the driver runs, it wil need | |
1114 | * to "catch up" to where the hardware chain pointer is at. | |
1115 | */ | |
1116 | static void spider_net_resync_head_ptr(struct spider_net_card *card) | |
1117 | { | |
1118 | unsigned long flags; | |
1119 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1120 | struct spider_net_descr *descr; | |
1121 | int i, status; | |
1122 | ||
1123 | /* Advance head pointer past any empty descrs */ | |
1124 | descr = chain->head; | |
1125 | status = spider_net_get_descr_status(descr->hwdescr); | |
1126 | ||
1127 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) | |
1128 | return; | |
1129 | ||
1130 | spin_lock_irqsave(&chain->lock, flags); | |
1131 | ||
1132 | descr = chain->head; | |
1133 | status = spider_net_get_descr_status(descr->hwdescr); | |
1134 | for (i=0; i<chain->num_desc; i++) { | |
1135 | if (status != SPIDER_NET_DESCR_CARDOWNED) break; | |
1136 | descr = descr->next; | |
1137 | status = spider_net_get_descr_status(descr->hwdescr); | |
1138 | } | |
1139 | chain->head = descr; | |
1140 | ||
1141 | spin_unlock_irqrestore(&chain->lock, flags); | |
1142 | } | |
1143 | ||
1144 | static int spider_net_resync_tail_ptr(struct spider_net_card *card) | |
1145 | { | |
1146 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1147 | struct spider_net_descr *descr; | |
1148 | int i, status; | |
1149 | ||
1150 | /* Advance tail pointer past any empty and reaped descrs */ | |
1151 | descr = chain->tail; | |
1152 | status = spider_net_get_descr_status(descr->hwdescr); | |
1153 | ||
1154 | for (i=0; i<chain->num_desc; i++) { | |
1155 | if ((status != SPIDER_NET_DESCR_CARDOWNED) && | |
1156 | (status != SPIDER_NET_DESCR_NOT_IN_USE)) break; | |
1157 | descr = descr->next; | |
1158 | status = spider_net_get_descr_status(descr->hwdescr); | |
1159 | } | |
1160 | chain->tail = descr; | |
1161 | ||
1162 | if ((i == chain->num_desc) || (i == 0)) | |
1163 | return 1; | |
1164 | return 0; | |
1165 | } | |
1166 | ||
aaec0fab | 1167 | /** |
7376e732 | 1168 | * spider_net_decode_one_descr - processes an RX descriptor |
aaec0fab JO |
1169 | * @card: card structure |
1170 | * | |
7376e732 | 1171 | * Returns 1 if a packet has been sent to the stack, otherwise 0. |
aaec0fab | 1172 | * |
7376e732 LV |
1173 | * Processes an RX descriptor by iommu-unmapping the data buffer |
1174 | * and passing the packet up to the stack. This function is called | |
1175 | * in softirq context, e.g. either bottom half from interrupt or | |
1176 | * NAPI polling context. | |
aaec0fab JO |
1177 | */ |
1178 | static int | |
1cd173f6 | 1179 | spider_net_decode_one_descr(struct spider_net_card *card) |
aaec0fab | 1180 | { |
09f75cd7 | 1181 | struct net_device *dev = card->netdev; |
bdd01503 JO |
1182 | struct spider_net_descr_chain *chain = &card->rx_chain; |
1183 | struct spider_net_descr *descr = chain->tail; | |
4cb6f9e5 | 1184 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
9e0a6e25 | 1185 | u32 hw_buf_addr; |
bdd01503 | 1186 | int status; |
aaec0fab | 1187 | |
4cb6f9e5 | 1188 | status = spider_net_get_descr_status(hwdescr); |
aaec0fab | 1189 | |
80dab7c7 LV |
1190 | /* Nothing in the descriptor, or ring must be empty */ |
1191 | if ((status == SPIDER_NET_DESCR_CARDOWNED) || | |
1192 | (status == SPIDER_NET_DESCR_NOT_IN_USE)) | |
1cd173f6 | 1193 | return 0; |
aaec0fab | 1194 | |
11f1a52b | 1195 | /* descriptor definitively used -- move on tail */ |
aaec0fab JO |
1196 | chain->tail = descr->next; |
1197 | ||
05b346b5 | 1198 | /* unmap descriptor */ |
9e0a6e25 LV |
1199 | hw_buf_addr = hwdescr->buf_addr; |
1200 | hwdescr->buf_addr = 0xffffffff; | |
1201 | pci_unmap_single(card->pdev, hw_buf_addr, | |
05b346b5 LV |
1202 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
1203 | ||
aaec0fab JO |
1204 | if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || |
1205 | (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || | |
1206 | (status == SPIDER_NET_DESCR_FORCE_END) ) { | |
1207 | if (netif_msg_rx_err(card)) | |
09f75cd7 | 1208 | dev_err(&dev->dev, |
e6311d85 | 1209 | "dropping RX descriptor with state %d\n", status); |
09f75cd7 | 1210 | dev->stats.rx_dropped++; |
7f7223b8 | 1211 | goto bad_desc; |
aaec0fab JO |
1212 | } |
1213 | ||
1214 | if ( (status != SPIDER_NET_DESCR_COMPLETE) && | |
1215 | (status != SPIDER_NET_DESCR_FRAME_END) ) { | |
5a028877 | 1216 | if (netif_msg_rx_err(card)) |
e6311d85 LV |
1217 | dev_err(&card->netdev->dev, |
1218 | "RX descriptor with unknown state %d\n", status); | |
5a028877 | 1219 | card->spider_stats.rx_desc_unk_state++; |
7f7223b8 | 1220 | goto bad_desc; |
aaec0fab JO |
1221 | } |
1222 | ||
366684bd | 1223 | /* The cases we'll throw away the packet immediately */ |
4cb6f9e5 | 1224 | if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) { |
366684bd | 1225 | if (netif_msg_rx_err(card)) |
e6311d85 LV |
1226 | dev_err(&card->netdev->dev, |
1227 | "error in received descriptor found, " | |
366684bd | 1228 | "data_status=x%08x, data_error=x%08x\n", |
4cb6f9e5 | 1229 | hwdescr->data_status, hwdescr->data_error); |
7f7223b8 | 1230 | goto bad_desc; |
366684bd LV |
1231 | } |
1232 | ||
e65bbf13 | 1233 | if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) { |
e6311d85 | 1234 | dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", |
4cb6f9e5 | 1235 | hwdescr->dmac_cmd_status); |
9e0a6e25 | 1236 | pr_err("buf_addr=x%08x\n", hw_buf_addr); |
4cb6f9e5 LV |
1237 | pr_err("buf_size=x%08x\n", hwdescr->buf_size); |
1238 | pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); | |
1239 | pr_err("result_size=x%08x\n", hwdescr->result_size); | |
1240 | pr_err("valid_size=x%08x\n", hwdescr->valid_size); | |
1241 | pr_err("data_status=x%08x\n", hwdescr->data_status); | |
1242 | pr_err("data_error=x%08x\n", hwdescr->data_error); | |
6d24998f LV |
1243 | pr_err("which=%ld\n", descr - card->rx_chain.ring); |
1244 | ||
1245 | card->spider_stats.rx_desc_error++; | |
1246 | goto bad_desc; | |
1247 | } | |
1248 | ||
7f7223b8 LV |
1249 | /* Ok, we've got a packet in descr */ |
1250 | spider_net_pass_skb_up(descr, card); | |
83d35145 | 1251 | descr->skb = NULL; |
4cb6f9e5 | 1252 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
7f7223b8 LV |
1253 | return 1; |
1254 | ||
1255 | bad_desc: | |
9948357d LV |
1256 | if (netif_msg_rx_err(card)) |
1257 | show_rx_chain(card); | |
7f7223b8 | 1258 | dev_kfree_skb_irq(descr->skb); |
d9c199ee | 1259 | descr->skb = NULL; |
4cb6f9e5 | 1260 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
7f7223b8 | 1261 | return 0; |
aaec0fab JO |
1262 | } |
1263 | ||
1264 | /** | |
1265 | * spider_net_poll - NAPI poll function called by the stack to return packets | |
1266 | * @netdev: interface device structure | |
1267 | * @budget: number of packets we can pass to the stack at most | |
1268 | * | |
1269 | * returns 0 if no more packets available to the driver/stack. Returns 1, | |
1270 | * if the quota is exceeded, but the driver has still packets. | |
1271 | * | |
1272 | * spider_net_poll returns all packets from the rx descriptors to the stack | |
1273 | * (using netif_receive_skb). If all/enough packets are up, the driver | |
1274 | * reenables interrupts and returns 0. If not, 1 is returned. | |
1275 | */ | |
bea3348e | 1276 | static int spider_net_poll(struct napi_struct *napi, int budget) |
aaec0fab | 1277 | { |
bea3348e | 1278 | struct spider_net_card *card = container_of(napi, struct spider_net_card, napi); |
bea3348e SH |
1279 | int packets_done = 0; |
1280 | ||
1281 | while (packets_done < budget) { | |
1282 | if (!spider_net_decode_one_descr(card)) | |
aaec0fab | 1283 | break; |
bea3348e SH |
1284 | |
1285 | packets_done++; | |
aaec0fab JO |
1286 | } |
1287 | ||
4c4bd5a9 | 1288 | if ((packets_done == 0) && (card->num_rx_ints != 0)) { |
bea3348e SH |
1289 | if (!spider_net_resync_tail_ptr(card)) |
1290 | packets_done = budget; | |
4c4bd5a9 LV |
1291 | spider_net_resync_head_ptr(card); |
1292 | } | |
1293 | card->num_rx_ints = 0; | |
1294 | ||
11f1a52b | 1295 | spider_net_refill_rx_chain(card); |
80dab7c7 | 1296 | spider_net_enable_rxdmac(card); |
aaec0fab | 1297 | |
e1fd9070 LV |
1298 | spider_net_cleanup_tx_ring(card); |
1299 | ||
aaec0fab JO |
1300 | /* if all packets are in the stack, enable interrupts and return 0 */ |
1301 | /* if not, return 1 */ | |
bea3348e | 1302 | if (packets_done < budget) { |
288379f0 | 1303 | napi_complete(napi); |
aaec0fab | 1304 | spider_net_rx_irq_on(card); |
c3d1182a | 1305 | card->ignore_rx_ramfull = 0; |
aaec0fab JO |
1306 | } |
1307 | ||
bea3348e | 1308 | return packets_done; |
aaec0fab JO |
1309 | } |
1310 | ||
aaec0fab JO |
1311 | /** |
1312 | * spider_net_change_mtu - changes the MTU of an interface | |
1313 | * @netdev: interface device structure | |
1314 | * @new_mtu: new MTU value | |
1315 | * | |
1316 | * returns 0 on success, <0 on failure | |
1317 | */ | |
1318 | static int | |
1319 | spider_net_change_mtu(struct net_device *netdev, int new_mtu) | |
1320 | { | |
1321 | /* no need to re-alloc skbs or so -- the max mtu is about 2.3k | |
1322 | * and mtu is outbound only anyway */ | |
1323 | if ( (new_mtu < SPIDER_NET_MIN_MTU ) || | |
1324 | (new_mtu > SPIDER_NET_MAX_MTU) ) | |
1325 | return -EINVAL; | |
1326 | netdev->mtu = new_mtu; | |
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | /** | |
1331 | * spider_net_set_mac - sets the MAC of an interface | |
1332 | * @netdev: interface device structure | |
1333 | * @ptr: pointer to new MAC address | |
1334 | * | |
1335 | * Returns 0 on success, <0 on failure. Currently, we don't support this | |
1336 | * and will always return EOPNOTSUPP. | |
1337 | */ | |
1338 | static int | |
1339 | spider_net_set_mac(struct net_device *netdev, void *p) | |
1340 | { | |
1341 | struct spider_net_card *card = netdev_priv(netdev); | |
054034db | 1342 | u32 macl, macu, regvalue; |
aaec0fab JO |
1343 | struct sockaddr *addr = p; |
1344 | ||
aaec0fab JO |
1345 | if (!is_valid_ether_addr(addr->sa_data)) |
1346 | return -EADDRNOTAVAIL; | |
1347 | ||
054034db JO |
1348 | /* switch off GMACTPE and GMACRPE */ |
1349 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1350 | regvalue &= ~((1 << 5) | (1 << 6)); | |
1351 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1352 | ||
1353 | /* write mac */ | |
aaec0fab JO |
1354 | macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) + |
1355 | (addr->sa_data[2]<<8) + (addr->sa_data[3]); | |
1356 | macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]); | |
1357 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); | |
1358 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); | |
1359 | ||
054034db JO |
1360 | /* switch GMACTPE and GMACRPE back on */ |
1361 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1362 | regvalue |= ((1 << 5) | (1 << 6)); | |
1363 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1364 | ||
aaec0fab JO |
1365 | spider_net_set_promisc(card); |
1366 | ||
1367 | /* look up, whether we have been successful */ | |
1368 | if (spider_net_get_mac_address(netdev)) | |
1369 | return -EADDRNOTAVAIL; | |
1370 | if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len)) | |
1371 | return -EADDRNOTAVAIL; | |
1372 | ||
1373 | return 0; | |
1374 | } | |
1375 | ||
abdb66b5 KI |
1376 | /** |
1377 | * spider_net_link_reset | |
1378 | * @netdev: net device structure | |
1379 | * | |
1380 | * This is called when the PHY_LINK signal is asserted. For the blade this is | |
1381 | * not connected so we should never get here. | |
1382 | * | |
1383 | */ | |
1384 | static void | |
1385 | spider_net_link_reset(struct net_device *netdev) | |
1386 | { | |
1387 | ||
1388 | struct spider_net_card *card = netdev_priv(netdev); | |
1389 | ||
1390 | del_timer_sync(&card->aneg_timer); | |
1391 | ||
1392 | /* clear interrupt, block further interrupts */ | |
1393 | spider_net_write_reg(card, SPIDER_NET_GMACST, | |
1394 | spider_net_read_reg(card, SPIDER_NET_GMACST)); | |
1395 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); | |
1396 | ||
1397 | /* reset phy and setup aneg */ | |
81971bef IK |
1398 | card->aneg_count = 0; |
1399 | card->medium = BCM54XX_COPPER; | |
abdb66b5 KI |
1400 | spider_net_setup_aneg(card); |
1401 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1402 | ||
1403 | } | |
1404 | ||
aaec0fab JO |
1405 | /** |
1406 | * spider_net_handle_error_irq - handles errors raised by an interrupt | |
1407 | * @card: card structure | |
1408 | * @status_reg: interrupt status register 0 (GHIINT0STS) | |
1409 | * | |
1410 | * spider_net_handle_error_irq treats or ignores all error conditions | |
1411 | * found when an interrupt is presented | |
1412 | */ | |
1413 | static void | |
9a11fcb5 IK |
1414 | spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg, |
1415 | u32 error_reg1, u32 error_reg2) | |
aaec0fab | 1416 | { |
aaec0fab JO |
1417 | u32 i; |
1418 | int show_error = 1; | |
1419 | ||
aaec0fab JO |
1420 | /* check GHIINT0STS ************************************/ |
1421 | if (status_reg) | |
1422 | for (i = 0; i < 32; i++) | |
1423 | if (status_reg & (1<<i)) | |
1424 | switch (i) | |
1425 | { | |
1426 | /* let error_reg1 and error_reg2 evaluation decide, what to do | |
1427 | case SPIDER_NET_PHYINT: | |
1428 | case SPIDER_NET_GMAC2INT: | |
1429 | case SPIDER_NET_GMAC1INT: | |
aaec0fab JO |
1430 | case SPIDER_NET_GFIFOINT: |
1431 | case SPIDER_NET_DMACINT: | |
1432 | case SPIDER_NET_GSYSINT: | |
1433 | break; */ | |
1434 | ||
98b9040c LV |
1435 | case SPIDER_NET_GIPSINT: |
1436 | show_error = 0; | |
1437 | break; | |
1438 | ||
aaec0fab JO |
1439 | case SPIDER_NET_GPWOPCMPINT: |
1440 | /* PHY write operation completed */ | |
1441 | show_error = 0; | |
1442 | break; | |
1443 | case SPIDER_NET_GPROPCMPINT: | |
1444 | /* PHY read operation completed */ | |
1445 | /* we don't use semaphores, as we poll for the completion | |
1446 | * of the read operation in spider_net_read_phy. Should take | |
1447 | * about 50 us */ | |
1448 | show_error = 0; | |
1449 | break; | |
1450 | case SPIDER_NET_GPWFFINT: | |
1451 | /* PHY command queue full */ | |
1452 | if (netif_msg_intr(card)) | |
e6311d85 | 1453 | dev_err(&card->netdev->dev, "PHY write queue full\n"); |
aaec0fab JO |
1454 | show_error = 0; |
1455 | break; | |
1456 | ||
1457 | /* case SPIDER_NET_GRMDADRINT: not used. print a message */ | |
1458 | /* case SPIDER_NET_GRMARPINT: not used. print a message */ | |
1459 | /* case SPIDER_NET_GRMMPINT: not used. print a message */ | |
1460 | ||
1461 | case SPIDER_NET_GDTDEN0INT: | |
1462 | /* someone has set TX_DMA_EN to 0 */ | |
1463 | show_error = 0; | |
1464 | break; | |
1465 | ||
1466 | case SPIDER_NET_GDDDEN0INT: /* fallthrough */ | |
1467 | case SPIDER_NET_GDCDEN0INT: /* fallthrough */ | |
1468 | case SPIDER_NET_GDBDEN0INT: /* fallthrough */ | |
1469 | case SPIDER_NET_GDADEN0INT: | |
1470 | /* someone has set RX_DMA_EN to 0 */ | |
1471 | show_error = 0; | |
1472 | break; | |
1473 | ||
1474 | /* RX interrupts */ | |
1475 | case SPIDER_NET_GDDFDCINT: | |
1476 | case SPIDER_NET_GDCFDCINT: | |
1477 | case SPIDER_NET_GDBFDCINT: | |
1478 | case SPIDER_NET_GDAFDCINT: | |
1479 | /* case SPIDER_NET_GDNMINT: not used. print a message */ | |
1480 | /* case SPIDER_NET_GCNMINT: not used. print a message */ | |
1481 | /* case SPIDER_NET_GBNMINT: not used. print a message */ | |
1482 | /* case SPIDER_NET_GANMINT: not used. print a message */ | |
1483 | /* case SPIDER_NET_GRFNMINT: not used. print a message */ | |
1484 | show_error = 0; | |
1485 | break; | |
1486 | ||
1487 | /* TX interrupts */ | |
1488 | case SPIDER_NET_GDTFDCINT: | |
1489 | show_error = 0; | |
1490 | break; | |
1491 | case SPIDER_NET_GTTEDINT: | |
1492 | show_error = 0; | |
1493 | break; | |
1494 | case SPIDER_NET_GDTDCEINT: | |
1495 | /* chain end. If a descriptor should be sent, kick off | |
1496 | * tx dma | |
98b9040c | 1497 | if (card->tx_chain.tail != card->tx_chain.head) |
aaec0fab | 1498 | spider_net_kick_tx_dma(card); |
98b9040c LV |
1499 | */ |
1500 | show_error = 0; | |
aaec0fab JO |
1501 | break; |
1502 | ||
1503 | /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ | |
1504 | /* case SPIDER_NET_GFREECNTINT: not used. print a message */ | |
1505 | } | |
1506 | ||
1507 | /* check GHIINT1STS ************************************/ | |
1508 | if (error_reg1) | |
1509 | for (i = 0; i < 32; i++) | |
1510 | if (error_reg1 & (1<<i)) | |
1511 | switch (i) | |
1512 | { | |
1513 | case SPIDER_NET_GTMFLLINT: | |
fc8e13da IK |
1514 | /* TX RAM full may happen on a usual case. |
1515 | * Logging is not needed. */ | |
aaec0fab JO |
1516 | show_error = 0; |
1517 | break; | |
11f1a52b AB |
1518 | case SPIDER_NET_GRFDFLLINT: /* fallthrough */ |
1519 | case SPIDER_NET_GRFCFLLINT: /* fallthrough */ | |
1520 | case SPIDER_NET_GRFBFLLINT: /* fallthrough */ | |
1521 | case SPIDER_NET_GRFAFLLINT: /* fallthrough */ | |
aaec0fab | 1522 | case SPIDER_NET_GRMFLLINT: |
4c4bd5a9 | 1523 | /* Could happen when rx chain is full */ |
c3d1182a LV |
1524 | if (card->ignore_rx_ramfull == 0) { |
1525 | card->ignore_rx_ramfull = 1; | |
1526 | spider_net_resync_head_ptr(card); | |
1527 | spider_net_refill_rx_chain(card); | |
1528 | spider_net_enable_rxdmac(card); | |
1529 | card->num_rx_ints ++; | |
288379f0 | 1530 | napi_schedule(&card->napi); |
c3d1182a | 1531 | } |
11f1a52b | 1532 | show_error = 0; |
aaec0fab JO |
1533 | break; |
1534 | ||
1535 | /* case SPIDER_NET_GTMSHTINT: problem, print a message */ | |
1536 | case SPIDER_NET_GDTINVDINT: | |
1537 | /* allrighty. tx from previous descr ok */ | |
1538 | show_error = 0; | |
1539 | break; | |
aaec0fab JO |
1540 | |
1541 | /* chain end */ | |
1542 | case SPIDER_NET_GDDDCEINT: /* fallthrough */ | |
1543 | case SPIDER_NET_GDCDCEINT: /* fallthrough */ | |
1544 | case SPIDER_NET_GDBDCEINT: /* fallthrough */ | |
1545 | case SPIDER_NET_GDADCEINT: | |
4c4bd5a9 | 1546 | spider_net_resync_head_ptr(card); |
aaec0fab | 1547 | spider_net_refill_rx_chain(card); |
11f1a52b | 1548 | spider_net_enable_rxdmac(card); |
4c4bd5a9 | 1549 | card->num_rx_ints ++; |
288379f0 | 1550 | napi_schedule(&card->napi); |
aaec0fab JO |
1551 | show_error = 0; |
1552 | break; | |
1553 | ||
1554 | /* invalid descriptor */ | |
1555 | case SPIDER_NET_GDDINVDINT: /* fallthrough */ | |
1556 | case SPIDER_NET_GDCINVDINT: /* fallthrough */ | |
1557 | case SPIDER_NET_GDBINVDINT: /* fallthrough */ | |
1558 | case SPIDER_NET_GDAINVDINT: | |
4c4bd5a9 LV |
1559 | /* Could happen when rx chain is full */ |
1560 | spider_net_resync_head_ptr(card); | |
aaec0fab | 1561 | spider_net_refill_rx_chain(card); |
11f1a52b | 1562 | spider_net_enable_rxdmac(card); |
4c4bd5a9 | 1563 | card->num_rx_ints ++; |
288379f0 | 1564 | napi_schedule(&card->napi); |
aaec0fab JO |
1565 | show_error = 0; |
1566 | break; | |
1567 | ||
1568 | /* case SPIDER_NET_GDTRSERINT: problem, print a message */ | |
1569 | /* case SPIDER_NET_GDDRSERINT: problem, print a message */ | |
1570 | /* case SPIDER_NET_GDCRSERINT: problem, print a message */ | |
1571 | /* case SPIDER_NET_GDBRSERINT: problem, print a message */ | |
1572 | /* case SPIDER_NET_GDARSERINT: problem, print a message */ | |
1573 | /* case SPIDER_NET_GDSERINT: problem, print a message */ | |
1574 | /* case SPIDER_NET_GDTPTERINT: problem, print a message */ | |
1575 | /* case SPIDER_NET_GDDPTERINT: problem, print a message */ | |
1576 | /* case SPIDER_NET_GDCPTERINT: problem, print a message */ | |
1577 | /* case SPIDER_NET_GDBPTERINT: problem, print a message */ | |
1578 | /* case SPIDER_NET_GDAPTERINT: problem, print a message */ | |
1579 | default: | |
1580 | show_error = 1; | |
1581 | break; | |
1582 | } | |
1583 | ||
1584 | /* check GHIINT2STS ************************************/ | |
1585 | if (error_reg2) | |
1586 | for (i = 0; i < 32; i++) | |
1587 | if (error_reg2 & (1<<i)) | |
1588 | switch (i) | |
1589 | { | |
1590 | /* there is nothing we can (want to) do at this time. Log a | |
1591 | * message, we can switch on and off the specific values later on | |
1592 | case SPIDER_NET_GPROPERINT: | |
1593 | case SPIDER_NET_GMCTCRSNGINT: | |
1594 | case SPIDER_NET_GMCTLCOLINT: | |
1595 | case SPIDER_NET_GMCTTMOTINT: | |
1596 | case SPIDER_NET_GMCRCAERINT: | |
1597 | case SPIDER_NET_GMCRCALERINT: | |
1598 | case SPIDER_NET_GMCRALNERINT: | |
1599 | case SPIDER_NET_GMCROVRINT: | |
1600 | case SPIDER_NET_GMCRRNTINT: | |
1601 | case SPIDER_NET_GMCRRXERINT: | |
1602 | case SPIDER_NET_GTITCSERINT: | |
1603 | case SPIDER_NET_GTIFMTERINT: | |
1604 | case SPIDER_NET_GTIPKTRVKINT: | |
1605 | case SPIDER_NET_GTISPINGINT: | |
1606 | case SPIDER_NET_GTISADNGINT: | |
1607 | case SPIDER_NET_GTISPDNGINT: | |
1608 | case SPIDER_NET_GRIFMTERINT: | |
1609 | case SPIDER_NET_GRIPKTRVKINT: | |
1610 | case SPIDER_NET_GRISPINGINT: | |
1611 | case SPIDER_NET_GRISADNGINT: | |
1612 | case SPIDER_NET_GRISPDNGINT: | |
1613 | break; | |
1614 | */ | |
1615 | default: | |
1616 | break; | |
1617 | } | |
1618 | ||
5a028877 | 1619 | if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) |
e6311d85 | 1620 | dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, " |
aaec0fab JO |
1621 | "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", |
1622 | status_reg, error_reg1, error_reg2); | |
1623 | ||
1624 | /* clear interrupt sources */ | |
1625 | spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); | |
1626 | spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); | |
1627 | } | |
1628 | ||
1629 | /** | |
1630 | * spider_net_interrupt - interrupt handler for spider_net | |
3a4fa0a2 | 1631 | * @irq: interrupt number |
aaec0fab | 1632 | * @ptr: pointer to net_device |
aaec0fab JO |
1633 | * |
1634 | * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no | |
1635 | * interrupt found raised by card. | |
1636 | * | |
1637 | * This is the interrupt handler, that turns off | |
1638 | * interrupts for this device and makes the stack poll the driver | |
1639 | */ | |
1640 | static irqreturn_t | |
7d12e780 | 1641 | spider_net_interrupt(int irq, void *ptr) |
aaec0fab JO |
1642 | { |
1643 | struct net_device *netdev = ptr; | |
1644 | struct spider_net_card *card = netdev_priv(netdev); | |
9a11fcb5 | 1645 | u32 status_reg, error_reg1, error_reg2; |
aaec0fab JO |
1646 | |
1647 | status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); | |
9a11fcb5 IK |
1648 | error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); |
1649 | error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); | |
aaec0fab | 1650 | |
9a11fcb5 IK |
1651 | if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) && |
1652 | !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) && | |
1653 | !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE)) | |
aaec0fab JO |
1654 | return IRQ_NONE; |
1655 | ||
aaec0fab JO |
1656 | if (status_reg & SPIDER_NET_RXINT ) { |
1657 | spider_net_rx_irq_off(card); | |
288379f0 | 1658 | napi_schedule(&card->napi); |
4c4bd5a9 | 1659 | card->num_rx_ints ++; |
aaec0fab | 1660 | } |
68a8c609 | 1661 | if (status_reg & SPIDER_NET_TXINT) |
288379f0 | 1662 | napi_schedule(&card->napi); |
aaec0fab | 1663 | |
abdb66b5 KI |
1664 | if (status_reg & SPIDER_NET_LINKINT) |
1665 | spider_net_link_reset(netdev); | |
1666 | ||
11f1a52b | 1667 | if (status_reg & SPIDER_NET_ERRINT ) |
9a11fcb5 IK |
1668 | spider_net_handle_error_irq(card, status_reg, |
1669 | error_reg1, error_reg2); | |
aaec0fab JO |
1670 | |
1671 | /* clear interrupt sources */ | |
1672 | spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); | |
1673 | ||
1674 | return IRQ_HANDLED; | |
1675 | } | |
1676 | ||
1677 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1678 | /** | |
1679 | * spider_net_poll_controller - artificial interrupt for netconsole etc. | |
1680 | * @netdev: interface device structure | |
1681 | * | |
1682 | * see Documentation/networking/netconsole.txt | |
1683 | */ | |
1684 | static void | |
1685 | spider_net_poll_controller(struct net_device *netdev) | |
1686 | { | |
1687 | disable_irq(netdev->irq); | |
7d12e780 | 1688 | spider_net_interrupt(netdev->irq, netdev); |
aaec0fab JO |
1689 | enable_irq(netdev->irq); |
1690 | } | |
1691 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1692 | ||
7a627558 IK |
1693 | /** |
1694 | * spider_net_enable_interrupts - enable interrupts | |
1695 | * @card: card structure | |
1696 | * | |
1697 | * spider_net_enable_interrupt enables several interrupts | |
1698 | */ | |
7d2e3cb7 | 1699 | static void |
7a627558 IK |
1700 | spider_net_enable_interrupts(struct spider_net_card *card) |
1701 | { | |
1702 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, | |
1703 | SPIDER_NET_INT0_MASK_VALUE); | |
1704 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, | |
1705 | SPIDER_NET_INT1_MASK_VALUE); | |
1706 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, | |
1707 | SPIDER_NET_INT2_MASK_VALUE); | |
1708 | } | |
1709 | ||
1710 | /** | |
1711 | * spider_net_disable_interrupts - disable interrupts | |
1712 | * @card: card structure | |
1713 | * | |
1714 | * spider_net_disable_interrupts disables all the interrupts | |
1715 | */ | |
7d2e3cb7 | 1716 | static void |
7a627558 IK |
1717 | spider_net_disable_interrupts(struct spider_net_card *card) |
1718 | { | |
1719 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); | |
1720 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); | |
1721 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); | |
1722 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); | |
1723 | } | |
1724 | ||
aaec0fab JO |
1725 | /** |
1726 | * spider_net_init_card - initializes the card | |
1727 | * @card: card structure | |
1728 | * | |
1729 | * spider_net_init_card initializes the card so that other registers can | |
1730 | * be used | |
1731 | */ | |
1732 | static void | |
1733 | spider_net_init_card(struct spider_net_card *card) | |
1734 | { | |
1735 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1736 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1737 | ||
1738 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1739 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
3342cf0e KI |
1740 | |
1741 | /* trigger ETOMOD signal */ | |
1742 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, | |
1743 | spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); | |
1744 | ||
7a627558 | 1745 | spider_net_disable_interrupts(card); |
aaec0fab JO |
1746 | } |
1747 | ||
1748 | /** | |
1749 | * spider_net_enable_card - enables the card by setting all kinds of regs | |
1750 | * @card: card structure | |
1751 | * | |
1752 | * spider_net_enable_card sets a lot of SMMIO registers to enable the device | |
1753 | */ | |
1754 | static void | |
1755 | spider_net_enable_card(struct spider_net_card *card) | |
1756 | { | |
1757 | int i; | |
1758 | /* the following array consists of (register),(value) pairs | |
1759 | * that are set in this function. A register of 0 ends the list */ | |
1760 | u32 regs[][2] = { | |
1761 | { SPIDER_NET_GRESUMINTNUM, 0 }, | |
1762 | { SPIDER_NET_GREINTNUM, 0 }, | |
1763 | ||
1764 | /* set interrupt frame number registers */ | |
1765 | /* clear the single DMA engine registers first */ | |
1766 | { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1767 | { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1768 | { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1769 | { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1770 | /* then set, what we really need */ | |
1771 | { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, | |
1772 | ||
1773 | /* timer counter registers and stuff */ | |
1774 | { SPIDER_NET_GFREECNNUM, 0 }, | |
1775 | { SPIDER_NET_GONETIMENUM, 0 }, | |
1776 | { SPIDER_NET_GTOUTFRMNUM, 0 }, | |
1777 | ||
1778 | /* RX mode setting */ | |
1779 | { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, | |
1780 | /* TX mode setting */ | |
1781 | { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, | |
1782 | /* IPSEC mode setting */ | |
1783 | { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, | |
1784 | ||
1785 | { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, | |
1786 | ||
1787 | { SPIDER_NET_GMRWOLCTRL, 0 }, | |
b636d17a JO |
1788 | { SPIDER_NET_GTESTMD, 0x10000000 }, |
1789 | { SPIDER_NET_GTTQMSK, 0x00400040 }, | |
aaec0fab JO |
1790 | |
1791 | { SPIDER_NET_GMACINTEN, 0 }, | |
1792 | ||
1793 | /* flow control stuff */ | |
1794 | { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, | |
1795 | { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, | |
1796 | ||
1797 | { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, | |
1798 | { 0, 0} | |
1799 | }; | |
1800 | ||
1801 | i = 0; | |
1802 | while (regs[i][0]) { | |
1803 | spider_net_write_reg(card, regs[i][0], regs[i][1]); | |
1804 | i++; | |
1805 | } | |
1806 | ||
1807 | /* clear unicast filter table entries 1 to 14 */ | |
1808 | for (i = 1; i <= 14; i++) { | |
1809 | spider_net_write_reg(card, | |
1810 | SPIDER_NET_GMRUAFILnR + i * 8, | |
1811 | 0x00080000); | |
1812 | spider_net_write_reg(card, | |
1813 | SPIDER_NET_GMRUAFILnR + i * 8 + 4, | |
1814 | 0x00000000); | |
1815 | } | |
1816 | ||
1817 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); | |
1818 | ||
1819 | spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); | |
1820 | ||
3ad2f3fb | 1821 | /* set chain tail address for RX chains and |
aaec0fab JO |
1822 | * enable DMA */ |
1823 | spider_net_enable_rxchtails(card); | |
1824 | spider_net_enable_rxdmac(card); | |
1825 | ||
1826 | spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); | |
1827 | ||
aaec0fab JO |
1828 | spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, |
1829 | SPIDER_NET_LENLMT_VALUE); | |
aaec0fab JO |
1830 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, |
1831 | SPIDER_NET_OPMODE_VALUE); | |
1832 | ||
bdd01503 | 1833 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
7bd54c86 | 1834 | SPIDER_NET_GDTBSTA); |
aaec0fab JO |
1835 | } |
1836 | ||
3cf761dd KI |
1837 | /** |
1838 | * spider_net_download_firmware - loads firmware into the adapter | |
1839 | * @card: card structure | |
1840 | * @firmware_ptr: pointer to firmware data | |
1841 | * | |
1842 | * spider_net_download_firmware loads the firmware data into the | |
1843 | * adapter. It assumes the length etc. to be allright. | |
1844 | */ | |
1845 | static int | |
1846 | spider_net_download_firmware(struct spider_net_card *card, | |
1847 | const void *firmware_ptr) | |
1848 | { | |
1849 | int sequencer, i; | |
1850 | const u32 *fw_ptr = firmware_ptr; | |
1851 | ||
1852 | /* stop sequencers */ | |
1853 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1854 | SPIDER_NET_STOP_SEQ_VALUE); | |
1855 | ||
1856 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; | |
1857 | sequencer++) { | |
1858 | spider_net_write_reg(card, | |
1859 | SPIDER_NET_GSnPRGADR + sequencer * 8, 0); | |
1860 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { | |
1861 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + | |
1862 | sequencer * 8, *fw_ptr); | |
1863 | fw_ptr++; | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) | |
1868 | return -EIO; | |
1869 | ||
1870 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1871 | SPIDER_NET_RUN_SEQ_VALUE); | |
1872 | ||
1873 | return 0; | |
1874 | } | |
1875 | ||
1876 | /** | |
1877 | * spider_net_init_firmware - reads in firmware parts | |
1878 | * @card: card structure | |
1879 | * | |
1880 | * Returns 0 on success, <0 on failure | |
1881 | * | |
1882 | * spider_net_init_firmware opens the sequencer firmware and does some basic | |
1883 | * checks. This function opens and releases the firmware structure. A call | |
1884 | * to download the firmware is performed before the release. | |
1885 | * | |
1886 | * Firmware format | |
1887 | * =============== | |
1888 | * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being | |
1889 | * the program for each sequencer. Use the command | |
1890 | * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ | |
1891 | * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ | |
1892 | * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin | |
1893 | * | |
1894 | * to generate spider_fw.bin, if you have sequencer programs with something | |
1895 | * like the following contents for each sequencer: | |
1896 | * <ONE LINE COMMENT> | |
1897 | * <FIRST 4-BYTES-WORD FOR SEQUENCER> | |
1898 | * <SECOND 4-BYTES-WORD FOR SEQUENCER> | |
1899 | * ... | |
1900 | * <1024th 4-BYTES-WORD FOR SEQUENCER> | |
1901 | */ | |
1902 | static int | |
1903 | spider_net_init_firmware(struct spider_net_card *card) | |
1904 | { | |
1905 | struct firmware *firmware = NULL; | |
1906 | struct device_node *dn; | |
1907 | const u8 *fw_prop = NULL; | |
1908 | int err = -ENOENT; | |
1909 | int fw_size; | |
1910 | ||
1911 | if (request_firmware((const struct firmware **)&firmware, | |
1912 | SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { | |
1913 | if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && | |
1914 | netif_msg_probe(card) ) { | |
e6311d85 LV |
1915 | dev_err(&card->netdev->dev, |
1916 | "Incorrect size of spidernet firmware in " \ | |
3cf761dd KI |
1917 | "filesystem. Looking in host firmware...\n"); |
1918 | goto try_host_fw; | |
1919 | } | |
1920 | err = spider_net_download_firmware(card, firmware->data); | |
1921 | ||
1922 | release_firmware(firmware); | |
1923 | if (err) | |
1924 | goto try_host_fw; | |
1925 | ||
1926 | goto done; | |
1927 | } | |
1928 | ||
1929 | try_host_fw: | |
1930 | dn = pci_device_to_OF_node(card->pdev); | |
1931 | if (!dn) | |
1932 | goto out_err; | |
1933 | ||
40cd3a45 | 1934 | fw_prop = of_get_property(dn, "firmware", &fw_size); |
3cf761dd KI |
1935 | if (!fw_prop) |
1936 | goto out_err; | |
1937 | ||
1938 | if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && | |
1939 | netif_msg_probe(card) ) { | |
e6311d85 LV |
1940 | dev_err(&card->netdev->dev, |
1941 | "Incorrect size of spidernet firmware in host firmware\n"); | |
3cf761dd KI |
1942 | goto done; |
1943 | } | |
1944 | ||
1945 | err = spider_net_download_firmware(card, fw_prop); | |
1946 | ||
1947 | done: | |
1948 | return err; | |
1949 | out_err: | |
1950 | if (netif_msg_probe(card)) | |
e6311d85 LV |
1951 | dev_err(&card->netdev->dev, |
1952 | "Couldn't find spidernet firmware in filesystem " \ | |
3cf761dd KI |
1953 | "or host firmware\n"); |
1954 | return err; | |
1955 | } | |
1956 | ||
aaec0fab JO |
1957 | /** |
1958 | * spider_net_open - called upon ifonfig up | |
1959 | * @netdev: interface device structure | |
1960 | * | |
1961 | * returns 0 on success, <0 on failure | |
1962 | * | |
1963 | * spider_net_open allocates all the descriptors and memory needed for | |
1964 | * operation, sets up multicast list and enables interrupts | |
1965 | */ | |
1966 | int | |
1967 | spider_net_open(struct net_device *netdev) | |
1968 | { | |
1969 | struct spider_net_card *card = netdev_priv(netdev); | |
d4ed8f8d | 1970 | int result; |
aaec0fab | 1971 | |
3cf761dd KI |
1972 | result = spider_net_init_firmware(card); |
1973 | if (result) | |
1974 | goto init_firmware_failed; | |
1975 | ||
abdb66b5 | 1976 | /* start probing with copper */ |
81971bef IK |
1977 | card->aneg_count = 0; |
1978 | card->medium = BCM54XX_COPPER; | |
abdb66b5 KI |
1979 | spider_net_setup_aneg(card); |
1980 | if (card->phy.def->phy_id) | |
1981 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1982 | ||
d4ed8f8d LV |
1983 | result = spider_net_init_chain(card, &card->tx_chain); |
1984 | if (result) | |
aaec0fab | 1985 | goto alloc_tx_failed; |
204e5fa1 LV |
1986 | card->low_watermark = NULL; |
1987 | ||
d4ed8f8d LV |
1988 | result = spider_net_init_chain(card, &card->rx_chain); |
1989 | if (result) | |
aaec0fab JO |
1990 | goto alloc_rx_failed; |
1991 | ||
d4ed8f8d | 1992 | /* Allocate rx skbs */ |
228fb087 WY |
1993 | result = spider_net_alloc_rx_skbs(card); |
1994 | if (result) | |
aaec0fab JO |
1995 | goto alloc_skbs_failed; |
1996 | ||
1997 | spider_net_set_multi(netdev); | |
1998 | ||
1999 | /* further enhancement: setup hw vlan, if needed */ | |
2000 | ||
2001 | result = -EBUSY; | |
2002 | if (request_irq(netdev->irq, spider_net_interrupt, | |
1fb9df5d | 2003 | IRQF_SHARED, netdev->name, netdev)) |
aaec0fab JO |
2004 | goto register_int_failed; |
2005 | ||
2006 | spider_net_enable_card(card); | |
2007 | ||
543cec51 JO |
2008 | netif_start_queue(netdev); |
2009 | netif_carrier_on(netdev); | |
bea3348e | 2010 | napi_enable(&card->napi); |
543cec51 | 2011 | |
7a627558 IK |
2012 | spider_net_enable_interrupts(card); |
2013 | ||
aaec0fab JO |
2014 | return 0; |
2015 | ||
2016 | register_int_failed: | |
2017 | spider_net_free_rx_chain_contents(card); | |
2018 | alloc_skbs_failed: | |
2019 | spider_net_free_chain(card, &card->rx_chain); | |
2020 | alloc_rx_failed: | |
2021 | spider_net_free_chain(card, &card->tx_chain); | |
2022 | alloc_tx_failed: | |
abdb66b5 | 2023 | del_timer_sync(&card->aneg_timer); |
3cf761dd | 2024 | init_firmware_failed: |
aaec0fab JO |
2025 | return result; |
2026 | } | |
2027 | ||
abdb66b5 KI |
2028 | /** |
2029 | * spider_net_link_phy | |
2030 | * @data: used for pointer to card structure | |
2031 | * | |
2032 | */ | |
2033 | static void spider_net_link_phy(unsigned long data) | |
2034 | { | |
2035 | struct spider_net_card *card = (struct spider_net_card *)data; | |
2036 | struct mii_phy *phy = &card->phy; | |
2037 | ||
2038 | /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ | |
2039 | if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { | |
2040 | ||
0b50d753 IK |
2041 | pr_debug("%s: link is down trying to bring it up\n", |
2042 | card->netdev->name); | |
abdb66b5 | 2043 | |
4b23a554 JO |
2044 | switch (card->medium) { |
2045 | case BCM54XX_COPPER: | |
abdb66b5 KI |
2046 | /* enable fiber with autonegotiation first */ |
2047 | if (phy->def->ops->enable_fiber) | |
2048 | phy->def->ops->enable_fiber(phy, 1); | |
4b23a554 | 2049 | card->medium = BCM54XX_FIBER; |
abdb66b5 KI |
2050 | break; |
2051 | ||
4b23a554 | 2052 | case BCM54XX_FIBER: |
abdb66b5 KI |
2053 | /* fiber didn't come up, try to disable fiber autoneg */ |
2054 | if (phy->def->ops->enable_fiber) | |
2055 | phy->def->ops->enable_fiber(phy, 0); | |
4b23a554 | 2056 | card->medium = BCM54XX_UNKNOWN; |
abdb66b5 KI |
2057 | break; |
2058 | ||
4b23a554 | 2059 | case BCM54XX_UNKNOWN: |
abdb66b5 KI |
2060 | /* copper, fiber with and without failed, |
2061 | * retry from beginning */ | |
2062 | spider_net_setup_aneg(card); | |
4b23a554 | 2063 | card->medium = BCM54XX_COPPER; |
abdb66b5 KI |
2064 | break; |
2065 | } | |
2066 | ||
2067 | card->aneg_count = 0; | |
2068 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
2069 | return; | |
2070 | } | |
2071 | ||
2072 | /* link still not up, try again later */ | |
2073 | if (!(phy->def->ops->poll_link(phy))) { | |
2074 | card->aneg_count++; | |
2075 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
2076 | return; | |
2077 | } | |
2078 | ||
2079 | /* link came up, get abilities */ | |
2080 | phy->def->ops->read_link(phy); | |
2081 | ||
2082 | spider_net_write_reg(card, SPIDER_NET_GMACST, | |
2083 | spider_net_read_reg(card, SPIDER_NET_GMACST)); | |
2084 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); | |
2085 | ||
2086 | if (phy->speed == 1000) | |
2087 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); | |
2088 | else | |
2089 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); | |
2090 | ||
2091 | card->aneg_count = 0; | |
2092 | ||
0b50d753 IK |
2093 | pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n", |
2094 | card->netdev->name, phy->speed, | |
2095 | phy->duplex == 1 ? "Full" : "Half", | |
2096 | phy->autoneg == 1 ? "" : "no "); | |
abdb66b5 KI |
2097 | } |
2098 | ||
aaec0fab JO |
2099 | /** |
2100 | * spider_net_setup_phy - setup PHY | |
2101 | * @card: card structure | |
2102 | * | |
2103 | * returns 0 on success, <0 on failure | |
2104 | * | |
abdb66b5 | 2105 | * spider_net_setup_phy is used as part of spider_net_probe. |
aaec0fab JO |
2106 | **/ |
2107 | static int | |
2108 | spider_net_setup_phy(struct spider_net_card *card) | |
2109 | { | |
2110 | struct mii_phy *phy = &card->phy; | |
2111 | ||
2112 | spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, | |
2113 | SPIDER_NET_DMASEL_VALUE); | |
2114 | spider_net_write_reg(card, SPIDER_NET_GPCCTRL, | |
2115 | SPIDER_NET_PHY_CTRL_VALUE); | |
abdb66b5 | 2116 | |
aaec0fab JO |
2117 | phy->dev = card->netdev; |
2118 | phy->mdio_read = spider_net_read_phy; | |
2119 | phy->mdio_write = spider_net_write_phy; | |
2120 | ||
abdb66b5 KI |
2121 | for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { |
2122 | unsigned short id; | |
2123 | id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); | |
2124 | if (id != 0x0000 && id != 0xffff) { | |
19e2f6fe | 2125 | if (!sungem_phy_probe(phy, phy->mii_id)) { |
abdb66b5 KI |
2126 | pr_info("Found %s.\n", phy->def->name); |
2127 | break; | |
2128 | } | |
2129 | } | |
2130 | } | |
aaec0fab JO |
2131 | |
2132 | return 0; | |
2133 | } | |
2134 | ||
aaec0fab JO |
2135 | /** |
2136 | * spider_net_workaround_rxramfull - work around firmware bug | |
2137 | * @card: card structure | |
2138 | * | |
2139 | * no return value | |
2140 | **/ | |
2141 | static void | |
2142 | spider_net_workaround_rxramfull(struct spider_net_card *card) | |
2143 | { | |
2144 | int i, sequencer = 0; | |
2145 | ||
2146 | /* cancel reset */ | |
2147 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2148 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2149 | ||
2150 | /* empty sequencer data */ | |
11f1a52b AB |
2151 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
2152 | sequencer++) { | |
ee962a5c | 2153 | spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + |
aaec0fab | 2154 | sequencer * 8, 0x0); |
11f1a52b | 2155 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
aaec0fab JO |
2156 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
2157 | sequencer * 8, 0x0); | |
2158 | } | |
2159 | } | |
2160 | ||
2161 | /* set sequencer operation */ | |
2162 | spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); | |
2163 | ||
2164 | /* reset */ | |
2165 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2166 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2167 | } | |
2168 | ||
bdd01503 JO |
2169 | /** |
2170 | * spider_net_stop - called upon ifconfig down | |
2171 | * @netdev: interface device structure | |
2172 | * | |
2173 | * always returns 0 | |
2174 | */ | |
2175 | int | |
2176 | spider_net_stop(struct net_device *netdev) | |
2177 | { | |
2178 | struct spider_net_card *card = netdev_priv(netdev); | |
2179 | ||
bea3348e | 2180 | napi_disable(&card->napi); |
bdd01503 JO |
2181 | netif_carrier_off(netdev); |
2182 | netif_stop_queue(netdev); | |
2183 | del_timer_sync(&card->tx_timer); | |
abdb66b5 | 2184 | del_timer_sync(&card->aneg_timer); |
bdd01503 | 2185 | |
7a627558 | 2186 | spider_net_disable_interrupts(card); |
bdd01503 | 2187 | |
d406eafe | 2188 | free_irq(netdev->irq, netdev); |
bdd01503 JO |
2189 | |
2190 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
2191 | SPIDER_NET_DMA_TX_FEND_VALUE); | |
2192 | ||
2193 | /* turn off DMA, force end */ | |
2194 | spider_net_disable_rxdmac(card); | |
2195 | ||
2196 | /* release chains */ | |
9cc7bf7e | 2197 | spider_net_release_tx_chain(card, 1); |
d4ed8f8d | 2198 | spider_net_free_rx_chain_contents(card); |
bdd01503 JO |
2199 | |
2200 | spider_net_free_chain(card, &card->tx_chain); | |
2201 | spider_net_free_chain(card, &card->rx_chain); | |
2202 | ||
2203 | return 0; | |
2204 | } | |
2205 | ||
aaec0fab JO |
2206 | /** |
2207 | * spider_net_tx_timeout_task - task scheduled by the watchdog timeout | |
2208 | * function (to be called not under interrupt status) | |
2209 | * @data: data, is interface device structure | |
2210 | * | |
2211 | * called as task when tx hangs, resets interface (if interface is up) | |
2212 | */ | |
2213 | static void | |
c4028958 | 2214 | spider_net_tx_timeout_task(struct work_struct *work) |
aaec0fab | 2215 | { |
c4028958 DH |
2216 | struct spider_net_card *card = |
2217 | container_of(work, struct spider_net_card, tx_timeout_task); | |
2218 | struct net_device *netdev = card->netdev; | |
aaec0fab JO |
2219 | |
2220 | if (!(netdev->flags & IFF_UP)) | |
2221 | goto out; | |
2222 | ||
2223 | netif_device_detach(netdev); | |
2224 | spider_net_stop(netdev); | |
2225 | ||
2226 | spider_net_workaround_rxramfull(card); | |
2227 | spider_net_init_card(card); | |
2228 | ||
2229 | if (spider_net_setup_phy(card)) | |
2230 | goto out; | |
aaec0fab JO |
2231 | |
2232 | spider_net_open(netdev); | |
bdd01503 | 2233 | spider_net_kick_tx_dma(card); |
aaec0fab JO |
2234 | netif_device_attach(netdev); |
2235 | ||
2236 | out: | |
2237 | atomic_dec(&card->tx_timeout_task_counter); | |
2238 | } | |
2239 | ||
2240 | /** | |
2241 | * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. | |
2242 | * @netdev: interface device structure | |
2243 | * | |
2244 | * called, if tx hangs. Schedules a task that resets the interface | |
2245 | */ | |
2246 | static void | |
2247 | spider_net_tx_timeout(struct net_device *netdev) | |
2248 | { | |
2249 | struct spider_net_card *card; | |
2250 | ||
2251 | card = netdev_priv(netdev); | |
2252 | atomic_inc(&card->tx_timeout_task_counter); | |
2253 | if (netdev->flags & IFF_UP) | |
2254 | schedule_work(&card->tx_timeout_task); | |
2255 | else | |
2256 | atomic_dec(&card->tx_timeout_task_counter); | |
9b6b0b81 | 2257 | card->spider_stats.tx_timeouts++; |
aaec0fab JO |
2258 | } |
2259 | ||
6e06cb62 | 2260 | static const struct net_device_ops spider_net_ops = { |
da4a99e3 DM |
2261 | .ndo_open = spider_net_open, |
2262 | .ndo_stop = spider_net_stop, | |
2263 | .ndo_start_xmit = spider_net_xmit, | |
afc4b13d | 2264 | .ndo_set_rx_mode = spider_net_set_multi, |
da4a99e3 DM |
2265 | .ndo_set_mac_address = spider_net_set_mac, |
2266 | .ndo_change_mtu = spider_net_change_mtu, | |
2267 | .ndo_do_ioctl = spider_net_do_ioctl, | |
2268 | .ndo_tx_timeout = spider_net_tx_timeout, | |
3e303dc1 | 2269 | .ndo_validate_addr = eth_validate_addr, |
6e06cb62 YH |
2270 | /* HW VLAN */ |
2271 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2272 | /* poll controller */ | |
da4a99e3 | 2273 | .ndo_poll_controller = spider_net_poll_controller, |
6e06cb62 YH |
2274 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
2275 | }; | |
2276 | ||
aaec0fab JO |
2277 | /** |
2278 | * spider_net_setup_netdev_ops - initialization of net_device operations | |
2279 | * @netdev: net_device structure | |
2280 | * | |
2281 | * fills out function pointers in the net_device structure | |
2282 | */ | |
2283 | static void | |
2284 | spider_net_setup_netdev_ops(struct net_device *netdev) | |
2285 | { | |
6e06cb62 | 2286 | netdev->netdev_ops = &spider_net_ops; |
aaec0fab | 2287 | netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; |
aaec0fab JO |
2288 | /* ethtool ops */ |
2289 | netdev->ethtool_ops = &spider_net_ethtool_ops; | |
2290 | } | |
2291 | ||
2292 | /** | |
2293 | * spider_net_setup_netdev - initialization of net_device | |
2294 | * @card: card structure | |
2295 | * | |
2296 | * Returns 0 on success or <0 on failure | |
2297 | * | |
2298 | * spider_net_setup_netdev initializes the net_device structure | |
2299 | **/ | |
2300 | static int | |
2301 | spider_net_setup_netdev(struct spider_net_card *card) | |
2302 | { | |
2303 | int result; | |
2304 | struct net_device *netdev = card->netdev; | |
2305 | struct device_node *dn; | |
2306 | struct sockaddr addr; | |
1a2509c9 | 2307 | const u8 *mac; |
aaec0fab | 2308 | |
aaec0fab JO |
2309 | SET_NETDEV_DEV(netdev, &card->pdev->dev); |
2310 | ||
2311 | pci_set_drvdata(card->pdev, netdev); | |
11f1a52b | 2312 | |
11f1a52b AB |
2313 | init_timer(&card->tx_timer); |
2314 | card->tx_timer.function = | |
2315 | (void (*)(unsigned long)) spider_net_cleanup_tx_ring; | |
2316 | card->tx_timer.data = (unsigned long) card; | |
aaec0fab JO |
2317 | netdev->irq = card->pdev->irq; |
2318 | ||
abdb66b5 KI |
2319 | card->aneg_count = 0; |
2320 | init_timer(&card->aneg_timer); | |
2321 | card->aneg_timer.function = spider_net_link_phy; | |
2322 | card->aneg_timer.data = (unsigned long) card; | |
2323 | ||
bea3348e SH |
2324 | netif_napi_add(netdev, &card->napi, |
2325 | spider_net_poll, SPIDER_NET_NAPI_WEIGHT); | |
2326 | ||
aaec0fab JO |
2327 | spider_net_setup_netdev_ops(netdev); |
2328 | ||
6de240b7 MM |
2329 | netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM; |
2330 | if (SPIDER_NET_RX_CSUM_DEFAULT) | |
2331 | netdev->features |= NETIF_F_RXCSUM; | |
2332 | netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX; | |
f646968f PM |
2333 | /* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | |
2334 | * NETIF_F_HW_VLAN_CTAG_FILTER */ | |
aaec0fab JO |
2335 | |
2336 | netdev->irq = card->pdev->irq; | |
4c4bd5a9 | 2337 | card->num_rx_ints = 0; |
c3d1182a | 2338 | card->ignore_rx_ramfull = 0; |
aaec0fab JO |
2339 | |
2340 | dn = pci_device_to_OF_node(card->pdev); | |
543cec51 JO |
2341 | if (!dn) |
2342 | return -EIO; | |
2343 | ||
40cd3a45 | 2344 | mac = of_get_property(dn, "local-mac-address", NULL); |
543cec51 JO |
2345 | if (!mac) |
2346 | return -EIO; | |
aaec0fab JO |
2347 | memcpy(addr.sa_data, mac, ETH_ALEN); |
2348 | ||
2349 | result = spider_net_set_mac(netdev, &addr); | |
2350 | if ((result) && (netif_msg_probe(card))) | |
e6311d85 LV |
2351 | dev_err(&card->netdev->dev, |
2352 | "Failed to set MAC address: %i\n", result); | |
aaec0fab JO |
2353 | |
2354 | result = register_netdev(netdev); | |
2355 | if (result) { | |
2356 | if (netif_msg_probe(card)) | |
e6311d85 LV |
2357 | dev_err(&card->netdev->dev, |
2358 | "Couldn't register net_device: %i\n", result); | |
aaec0fab JO |
2359 | return result; |
2360 | } | |
2361 | ||
2362 | if (netif_msg_probe(card)) | |
2363 | pr_info("Initialized device %s.\n", netdev->name); | |
2364 | ||
2365 | return 0; | |
2366 | } | |
2367 | ||
2368 | /** | |
2369 | * spider_net_alloc_card - allocates net_device and card structure | |
2370 | * | |
2371 | * returns the card structure or NULL in case of errors | |
2372 | * | |
2373 | * the card and net_device structures are linked to each other | |
2374 | */ | |
2375 | static struct spider_net_card * | |
2376 | spider_net_alloc_card(void) | |
2377 | { | |
2378 | struct net_device *netdev; | |
2379 | struct spider_net_card *card; | |
4cb6f9e5 | 2380 | size_t alloc_size; |
aaec0fab | 2381 | |
4cb6f9e5 LV |
2382 | alloc_size = sizeof(struct spider_net_card) + |
2383 | (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr); | |
2384 | netdev = alloc_etherdev(alloc_size); | |
aaec0fab JO |
2385 | if (!netdev) |
2386 | return NULL; | |
2387 | ||
2388 | card = netdev_priv(netdev); | |
2389 | card->netdev = netdev; | |
2390 | card->msg_enable = SPIDER_NET_DEFAULT_MSG; | |
c4028958 | 2391 | INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); |
aaec0fab JO |
2392 | init_waitqueue_head(&card->waitq); |
2393 | atomic_set(&card->tx_timeout_task_counter, 0); | |
2394 | ||
4cb6f9e5 LV |
2395 | card->rx_chain.num_desc = rx_descriptors; |
2396 | card->rx_chain.ring = card->darray; | |
2397 | card->tx_chain.num_desc = tx_descriptors; | |
2398 | card->tx_chain.ring = card->darray + rx_descriptors; | |
2399 | ||
aaec0fab JO |
2400 | return card; |
2401 | } | |
2402 | ||
2403 | /** | |
2404 | * spider_net_undo_pci_setup - releases PCI ressources | |
2405 | * @card: card structure | |
2406 | * | |
2407 | * spider_net_undo_pci_setup releases the mapped regions | |
2408 | */ | |
2409 | static void | |
2410 | spider_net_undo_pci_setup(struct spider_net_card *card) | |
2411 | { | |
2412 | iounmap(card->regs); | |
2413 | pci_release_regions(card->pdev); | |
2414 | } | |
2415 | ||
2416 | /** | |
2417 | * spider_net_setup_pci_dev - sets up the device in terms of PCI operations | |
aaec0fab JO |
2418 | * @pdev: PCI device |
2419 | * | |
2420 | * Returns the card structure or NULL if any errors occur | |
2421 | * | |
2422 | * spider_net_setup_pci_dev initializes pdev and together with the | |
2423 | * functions called in spider_net_open configures the device so that | |
2424 | * data can be transferred over it | |
2425 | * The net_device structure is attached to the card structure, if the | |
2426 | * function returns without error. | |
2427 | **/ | |
2428 | static struct spider_net_card * | |
2429 | spider_net_setup_pci_dev(struct pci_dev *pdev) | |
2430 | { | |
2431 | struct spider_net_card *card; | |
2432 | unsigned long mmio_start, mmio_len; | |
2433 | ||
2434 | if (pci_enable_device(pdev)) { | |
e6311d85 | 2435 | dev_err(&pdev->dev, "Couldn't enable PCI device\n"); |
aaec0fab JO |
2436 | return NULL; |
2437 | } | |
2438 | ||
2439 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
e6311d85 LV |
2440 | dev_err(&pdev->dev, |
2441 | "Couldn't find proper PCI device base address.\n"); | |
aaec0fab JO |
2442 | goto out_disable_dev; |
2443 | } | |
2444 | ||
2445 | if (pci_request_regions(pdev, spider_net_driver_name)) { | |
e6311d85 LV |
2446 | dev_err(&pdev->dev, |
2447 | "Couldn't obtain PCI resources, aborting.\n"); | |
aaec0fab JO |
2448 | goto out_disable_dev; |
2449 | } | |
2450 | ||
2451 | pci_set_master(pdev); | |
2452 | ||
2453 | card = spider_net_alloc_card(); | |
2454 | if (!card) { | |
e6311d85 LV |
2455 | dev_err(&pdev->dev, |
2456 | "Couldn't allocate net_device structure, aborting.\n"); | |
aaec0fab JO |
2457 | goto out_release_regions; |
2458 | } | |
2459 | card->pdev = pdev; | |
2460 | ||
2461 | /* fetch base address and length of first resource */ | |
2462 | mmio_start = pci_resource_start(pdev, 0); | |
2463 | mmio_len = pci_resource_len(pdev, 0); | |
2464 | ||
2465 | card->netdev->mem_start = mmio_start; | |
2466 | card->netdev->mem_end = mmio_start + mmio_len; | |
2467 | card->regs = ioremap(mmio_start, mmio_len); | |
2468 | ||
2469 | if (!card->regs) { | |
e6311d85 LV |
2470 | dev_err(&pdev->dev, |
2471 | "Couldn't obtain PCI resources, aborting.\n"); | |
aaec0fab JO |
2472 | goto out_release_regions; |
2473 | } | |
2474 | ||
2475 | return card; | |
2476 | ||
2477 | out_release_regions: | |
2478 | pci_release_regions(pdev); | |
2479 | out_disable_dev: | |
2480 | pci_disable_device(pdev); | |
aaec0fab JO |
2481 | return NULL; |
2482 | } | |
2483 | ||
2484 | /** | |
2485 | * spider_net_probe - initialization of a device | |
2486 | * @pdev: PCI device | |
2487 | * @ent: entry in the device id list | |
2488 | * | |
2489 | * Returns 0 on success, <0 on failure | |
2490 | * | |
2491 | * spider_net_probe initializes pdev and registers a net_device | |
2492 | * structure for it. After that, the device can be ifconfig'ed up | |
2493 | **/ | |
671a1435 | 2494 | static int |
aaec0fab JO |
2495 | spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
2496 | { | |
2497 | int err = -EIO; | |
2498 | struct spider_net_card *card; | |
2499 | ||
2500 | card = spider_net_setup_pci_dev(pdev); | |
2501 | if (!card) | |
2502 | goto out; | |
2503 | ||
2504 | spider_net_workaround_rxramfull(card); | |
2505 | spider_net_init_card(card); | |
2506 | ||
2507 | err = spider_net_setup_phy(card); | |
2508 | if (err) | |
2509 | goto out_undo_pci; | |
2510 | ||
aaec0fab JO |
2511 | err = spider_net_setup_netdev(card); |
2512 | if (err) | |
2513 | goto out_undo_pci; | |
2514 | ||
2515 | return 0; | |
2516 | ||
2517 | out_undo_pci: | |
2518 | spider_net_undo_pci_setup(card); | |
2519 | free_netdev(card->netdev); | |
2520 | out: | |
2521 | return err; | |
2522 | } | |
2523 | ||
2524 | /** | |
2525 | * spider_net_remove - removal of a device | |
2526 | * @pdev: PCI device | |
2527 | * | |
2528 | * Returns 0 on success, <0 on failure | |
2529 | * | |
2530 | * spider_net_remove is called to remove the device and unregisters the | |
2531 | * net_device | |
2532 | **/ | |
671a1435 | 2533 | static void |
aaec0fab JO |
2534 | spider_net_remove(struct pci_dev *pdev) |
2535 | { | |
2536 | struct net_device *netdev; | |
2537 | struct spider_net_card *card; | |
2538 | ||
2539 | netdev = pci_get_drvdata(pdev); | |
2540 | card = netdev_priv(netdev); | |
2541 | ||
2542 | wait_event(card->waitq, | |
2543 | atomic_read(&card->tx_timeout_task_counter) == 0); | |
2544 | ||
2545 | unregister_netdev(netdev); | |
543cec51 JO |
2546 | |
2547 | /* switch off card */ | |
2548 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2549 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2550 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2551 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2552 | ||
aaec0fab JO |
2553 | spider_net_undo_pci_setup(card); |
2554 | free_netdev(netdev); | |
aaec0fab JO |
2555 | } |
2556 | ||
2557 | static struct pci_driver spider_net_driver = { | |
aaec0fab JO |
2558 | .name = spider_net_driver_name, |
2559 | .id_table = spider_net_pci_tbl, | |
2560 | .probe = spider_net_probe, | |
671a1435 | 2561 | .remove = spider_net_remove |
aaec0fab JO |
2562 | }; |
2563 | ||
2564 | /** | |
2565 | * spider_net_init - init function when the driver is loaded | |
2566 | * | |
2567 | * spider_net_init registers the device driver | |
2568 | */ | |
2569 | static int __init spider_net_init(void) | |
2570 | { | |
90f10841 LV |
2571 | printk(KERN_INFO "Spidernet version %s.\n", VERSION); |
2572 | ||
aaec0fab JO |
2573 | if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { |
2574 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; | |
2575 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2576 | } | |
2577 | if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { | |
2578 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; | |
2579 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2580 | } | |
2581 | if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { | |
2582 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; | |
2583 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2584 | } | |
2585 | if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { | |
2586 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; | |
2587 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2588 | } | |
2589 | ||
2590 | return pci_register_driver(&spider_net_driver); | |
2591 | } | |
2592 | ||
2593 | /** | |
2594 | * spider_net_cleanup - exit function when driver is unloaded | |
2595 | * | |
2596 | * spider_net_cleanup unregisters the device driver | |
2597 | */ | |
2598 | static void __exit spider_net_cleanup(void) | |
2599 | { | |
2600 | pci_unregister_driver(&spider_net_driver); | |
2601 | } | |
2602 | ||
2603 | module_init(spider_net_init); | |
2604 | module_exit(spider_net_cleanup); |