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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 <net/checksum.h> |
52 | ||
53 | #include "spider_net.h" | |
54 | ||
55 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ | |
56 | "<Jens.Osterkamp@de.ibm.com>"); | |
57 | MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); | |
58 | MODULE_LICENSE("GPL"); | |
90f10841 | 59 | MODULE_VERSION(VERSION); |
866691a2 | 60 | MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME); |
aaec0fab JO |
61 | |
62 | static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; | |
63 | static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; | |
64 | ||
e2874f2e LV |
65 | module_param(rx_descriptors, int, 0444); |
66 | module_param(tx_descriptors, int, 0444); | |
aaec0fab JO |
67 | |
68 | MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ | |
69 | "in rx chains"); | |
70 | MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ | |
71 | "in tx chain"); | |
72 | ||
73 | char spider_net_driver_name[] = "spidernet"; | |
74 | ||
9baa3c34 | 75 | static const struct pci_device_id spider_net_pci_tbl[] = { |
aaec0fab JO |
76 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, |
77 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, | |
78 | { 0, } | |
79 | }; | |
80 | ||
81 | MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); | |
82 | ||
83 | /** | |
84 | * spider_net_read_reg - reads an SMMIO register of a card | |
85 | * @card: device structure | |
86 | * @reg: register to read from | |
87 | * | |
88 | * returns the content of the specified SMMIO register. | |
89 | */ | |
bdd01503 | 90 | static inline u32 |
aaec0fab JO |
91 | spider_net_read_reg(struct spider_net_card *card, u32 reg) |
92 | { | |
3bc0f40c BH |
93 | /* We use the powerpc specific variants instead of readl_be() because |
94 | * we know spidernet is not a real PCI device and we can thus avoid the | |
95 | * performance hit caused by the PCI workarounds. | |
96 | */ | |
97 | return in_be32(card->regs + reg); | |
aaec0fab JO |
98 | } |
99 | ||
100 | /** | |
101 | * spider_net_write_reg - writes to an SMMIO register of a card | |
102 | * @card: device structure | |
103 | * @reg: register to write to | |
104 | * @value: value to write into the specified SMMIO register | |
105 | */ | |
bdd01503 | 106 | static inline void |
aaec0fab JO |
107 | spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) |
108 | { | |
3bc0f40c BH |
109 | /* We use the powerpc specific variants instead of writel_be() because |
110 | * we know spidernet is not a real PCI device and we can thus avoid the | |
111 | * performance hit caused by the PCI workarounds. | |
112 | */ | |
113 | out_be32(card->regs + reg, value); | |
aaec0fab JO |
114 | } |
115 | ||
49ce9c2c BH |
116 | /** |
117 | * spider_net_write_phy - write to phy register | |
aaec0fab JO |
118 | * @netdev: adapter to be written to |
119 | * @mii_id: id of MII | |
120 | * @reg: PHY register | |
121 | * @val: value to be written to phy register | |
122 | * | |
123 | * spider_net_write_phy_register writes to an arbitrary PHY | |
124 | * register via the spider GPCWOPCMD register. We assume the queue does | |
125 | * not run full (not more than 15 commands outstanding). | |
126 | **/ | |
127 | static void | |
128 | spider_net_write_phy(struct net_device *netdev, int mii_id, | |
129 | int reg, int val) | |
130 | { | |
131 | struct spider_net_card *card = netdev_priv(netdev); | |
132 | u32 writevalue; | |
133 | ||
134 | writevalue = ((u32)mii_id << 21) | | |
135 | ((u32)reg << 16) | ((u32)val); | |
136 | ||
137 | spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); | |
138 | } | |
139 | ||
49ce9c2c BH |
140 | /** |
141 | * spider_net_read_phy - read from phy register | |
aaec0fab JO |
142 | * @netdev: network device to be read from |
143 | * @mii_id: id of MII | |
144 | * @reg: PHY register | |
145 | * | |
146 | * Returns value read from PHY register | |
147 | * | |
148 | * spider_net_write_phy reads from an arbitrary PHY | |
149 | * register via the spider GPCROPCMD register | |
150 | **/ | |
151 | static int | |
152 | spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) | |
153 | { | |
154 | struct spider_net_card *card = netdev_priv(netdev); | |
155 | u32 readvalue; | |
156 | ||
157 | readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); | |
158 | spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); | |
159 | ||
160 | /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT | |
161 | * interrupt, as we poll for the completion of the read operation | |
162 | * in spider_net_read_phy. Should take about 50 us */ | |
163 | do { | |
164 | readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); | |
165 | } while (readvalue & SPIDER_NET_GPREXEC); | |
166 | ||
167 | readvalue &= SPIDER_NET_GPRDAT_MASK; | |
168 | ||
169 | return readvalue; | |
170 | } | |
171 | ||
abdb66b5 KI |
172 | /** |
173 | * spider_net_setup_aneg - initial auto-negotiation setup | |
174 | * @card: device structure | |
175 | **/ | |
176 | static void | |
177 | spider_net_setup_aneg(struct spider_net_card *card) | |
178 | { | |
179 | struct mii_phy *phy = &card->phy; | |
180 | u32 advertise = 0; | |
a1c38a4a | 181 | u16 bmsr, estat; |
abdb66b5 | 182 | |
a1c38a4a IK |
183 | bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); |
184 | estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); | |
abdb66b5 KI |
185 | |
186 | if (bmsr & BMSR_10HALF) | |
187 | advertise |= ADVERTISED_10baseT_Half; | |
188 | if (bmsr & BMSR_10FULL) | |
189 | advertise |= ADVERTISED_10baseT_Full; | |
190 | if (bmsr & BMSR_100HALF) | |
191 | advertise |= ADVERTISED_100baseT_Half; | |
192 | if (bmsr & BMSR_100FULL) | |
193 | advertise |= ADVERTISED_100baseT_Full; | |
194 | ||
195 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) | |
196 | advertise |= SUPPORTED_1000baseT_Full; | |
197 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) | |
198 | advertise |= SUPPORTED_1000baseT_Half; | |
199 | ||
19e2f6fe | 200 | sungem_phy_probe(phy, phy->mii_id); |
abdb66b5 KI |
201 | phy->def->ops->setup_aneg(phy, advertise); |
202 | ||
203 | } | |
204 | ||
aaec0fab | 205 | /** |
11f1a52b | 206 | * spider_net_rx_irq_off - switch off rx irq on this spider card |
aaec0fab JO |
207 | * @card: device structure |
208 | * | |
11f1a52b | 209 | * switches off rx irq by masking them out in the GHIINTnMSK register |
aaec0fab JO |
210 | */ |
211 | static void | |
11f1a52b | 212 | spider_net_rx_irq_off(struct spider_net_card *card) |
aaec0fab JO |
213 | { |
214 | u32 regvalue; | |
aaec0fab | 215 | |
11f1a52b AB |
216 | regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); |
217 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
218 | } |
219 | ||
220 | /** | |
11f1a52b | 221 | * spider_net_rx_irq_on - switch on rx irq on this spider card |
aaec0fab JO |
222 | * @card: device structure |
223 | * | |
11f1a52b | 224 | * switches on rx irq by enabling them in the GHIINTnMSK register |
aaec0fab JO |
225 | */ |
226 | static void | |
11f1a52b | 227 | spider_net_rx_irq_on(struct spider_net_card *card) |
aaec0fab JO |
228 | { |
229 | u32 regvalue; | |
aaec0fab | 230 | |
11f1a52b AB |
231 | regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; |
232 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); | |
aaec0fab JO |
233 | } |
234 | ||
235 | /** | |
236 | * spider_net_set_promisc - sets the unicast address or the promiscuous mode | |
237 | * @card: card structure | |
238 | * | |
239 | * spider_net_set_promisc sets the unicast destination address filter and | |
240 | * thus either allows for non-promisc mode or promisc mode | |
241 | */ | |
242 | static void | |
243 | spider_net_set_promisc(struct spider_net_card *card) | |
244 | { | |
245 | u32 macu, macl; | |
246 | struct net_device *netdev = card->netdev; | |
247 | ||
248 | if (netdev->flags & IFF_PROMISC) { | |
249 | /* clear destination entry 0 */ | |
250 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); | |
251 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); | |
252 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
253 | SPIDER_NET_PROMISC_VALUE); | |
254 | } else { | |
255 | macu = netdev->dev_addr[0]; | |
256 | macu <<= 8; | |
257 | macu |= netdev->dev_addr[1]; | |
258 | memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); | |
259 | ||
260 | macu |= SPIDER_NET_UA_DESCR_VALUE; | |
261 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); | |
262 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); | |
263 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, | |
264 | SPIDER_NET_NONPROMISC_VALUE); | |
265 | } | |
266 | } | |
267 | ||
aaec0fab JO |
268 | /** |
269 | * spider_net_get_descr_status -- returns the status of a descriptor | |
270 | * @descr: descriptor to look at | |
271 | * | |
272 | * returns the status as in the dmac_cmd_status field of the descriptor | |
273 | */ | |
bdd01503 | 274 | static inline int |
4cb6f9e5 | 275 | spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) |
aaec0fab | 276 | { |
4cb6f9e5 | 277 | return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; |
aaec0fab JO |
278 | } |
279 | ||
280 | /** | |
281 | * spider_net_free_chain - free descriptor chain | |
282 | * @card: card structure | |
283 | * @chain: address of chain | |
284 | * | |
285 | */ | |
286 | static void | |
287 | spider_net_free_chain(struct spider_net_card *card, | |
288 | struct spider_net_descr_chain *chain) | |
289 | { | |
290 | struct spider_net_descr *descr; | |
291 | ||
d4ed8f8d LV |
292 | descr = chain->ring; |
293 | do { | |
aaec0fab | 294 | descr->bus_addr = 0; |
4cb6f9e5 | 295 | descr->hwdescr->next_descr_addr = 0; |
d4ed8f8d LV |
296 | descr = descr->next; |
297 | } while (descr != chain->ring); | |
298 | ||
299 | dma_free_coherent(&card->pdev->dev, chain->num_desc, | |
4cb6f9e5 | 300 | chain->hwring, chain->dma_addr); |
aaec0fab JO |
301 | } |
302 | ||
303 | /** | |
d4ed8f8d | 304 | * spider_net_init_chain - alloc and link descriptor chain |
aaec0fab JO |
305 | * @card: card structure |
306 | * @chain: address of chain | |
aaec0fab | 307 | * |
d4ed8f8d | 308 | * We manage a circular list that mirrors the hardware structure, |
aaec0fab JO |
309 | * except that the hardware uses bus addresses. |
310 | * | |
d4ed8f8d | 311 | * Returns 0 on success, <0 on failure |
aaec0fab JO |
312 | */ |
313 | static int | |
314 | spider_net_init_chain(struct spider_net_card *card, | |
d4ed8f8d | 315 | struct spider_net_descr_chain *chain) |
aaec0fab JO |
316 | { |
317 | int i; | |
318 | struct spider_net_descr *descr; | |
4cb6f9e5 | 319 | struct spider_net_hw_descr *hwdescr; |
11f1a52b | 320 | dma_addr_t buf; |
d4ed8f8d | 321 | size_t alloc_size; |
aaec0fab | 322 | |
4cb6f9e5 | 323 | alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); |
aaec0fab | 324 | |
4cb6f9e5 | 325 | chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, |
1f9061d2 | 326 | &chain->dma_addr, GFP_KERNEL); |
4cb6f9e5 | 327 | if (!chain->hwring) |
d4ed8f8d | 328 | return -ENOMEM; |
aaec0fab | 329 | |
4cb6f9e5 | 330 | memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr)); |
d4ed8f8d LV |
331 | |
332 | /* Set up the hardware pointers in each descriptor */ | |
4cb6f9e5 LV |
333 | descr = chain->ring; |
334 | hwdescr = chain->hwring; | |
d4ed8f8d | 335 | buf = chain->dma_addr; |
4cb6f9e5 LV |
336 | for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { |
337 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; | |
338 | hwdescr->next_descr_addr = 0; | |
aaec0fab | 339 | |
4cb6f9e5 | 340 | descr->hwdescr = hwdescr; |
11f1a52b | 341 | descr->bus_addr = buf; |
aaec0fab JO |
342 | descr->next = descr + 1; |
343 | descr->prev = descr - 1; | |
344 | ||
4cb6f9e5 | 345 | buf += sizeof(struct spider_net_hw_descr); |
aaec0fab JO |
346 | } |
347 | /* do actual circular list */ | |
d4ed8f8d LV |
348 | (descr-1)->next = chain->ring; |
349 | chain->ring->prev = descr-1; | |
aaec0fab | 350 | |
bdd01503 | 351 | spin_lock_init(&chain->lock); |
d4ed8f8d LV |
352 | chain->head = chain->ring; |
353 | chain->tail = chain->ring; | |
aaec0fab | 354 | return 0; |
aaec0fab JO |
355 | } |
356 | ||
357 | /** | |
358 | * spider_net_free_rx_chain_contents - frees descr contents in rx chain | |
359 | * @card: card structure | |
360 | * | |
361 | * returns 0 on success, <0 on failure | |
362 | */ | |
363 | static void | |
364 | spider_net_free_rx_chain_contents(struct spider_net_card *card) | |
365 | { | |
366 | struct spider_net_descr *descr; | |
367 | ||
368 | descr = card->rx_chain.head; | |
64751910 | 369 | do { |
aaec0fab | 370 | if (descr->skb) { |
4cb6f9e5 | 371 | pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, |
11f1a52b | 372 | SPIDER_NET_MAX_FRAME, |
348bc2a6 | 373 | PCI_DMA_BIDIRECTIONAL); |
d9c199ee LV |
374 | dev_kfree_skb(descr->skb); |
375 | descr->skb = NULL; | |
aaec0fab JO |
376 | } |
377 | descr = descr->next; | |
64751910 | 378 | } while (descr != card->rx_chain.head); |
aaec0fab JO |
379 | } |
380 | ||
381 | /** | |
a4182c50 | 382 | * spider_net_prepare_rx_descr - Reinitialize RX descriptor |
aaec0fab JO |
383 | * @card: card structure |
384 | * @descr: descriptor to re-init | |
385 | * | |
af901ca1 | 386 | * Return 0 on success, <0 on failure. |
aaec0fab | 387 | * |
a4182c50 LV |
388 | * Allocates a new rx skb, iommu-maps it and attaches it to the |
389 | * descriptor. Mark the descriptor as activated, ready-to-use. | |
aaec0fab JO |
390 | */ |
391 | static int | |
392 | spider_net_prepare_rx_descr(struct spider_net_card *card, | |
393 | struct spider_net_descr *descr) | |
394 | { | |
4cb6f9e5 | 395 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
8e0a613b | 396 | dma_addr_t buf; |
aaec0fab JO |
397 | int offset; |
398 | int bufsize; | |
399 | ||
400 | /* we need to round up the buffer size to a multiple of 128 */ | |
11f1a52b | 401 | bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & |
aaec0fab JO |
402 | (~(SPIDER_NET_RXBUF_ALIGN - 1)); |
403 | ||
404 | /* and we need to have it 128 byte aligned, therefore we allocate a | |
405 | * bit more */ | |
406 | /* allocate an skb */ | |
98739407 CH |
407 | descr->skb = netdev_alloc_skb(card->netdev, |
408 | bufsize + SPIDER_NET_RXBUF_ALIGN - 1); | |
aaec0fab | 409 | if (!descr->skb) { |
11f1a52b | 410 | if (netif_msg_rx_err(card) && net_ratelimit()) |
e6311d85 LV |
411 | dev_err(&card->netdev->dev, |
412 | "Not enough memory to allocate rx buffer\n"); | |
9b6b0b81 | 413 | card->spider_stats.alloc_rx_skb_error++; |
aaec0fab JO |
414 | return -ENOMEM; |
415 | } | |
4cb6f9e5 LV |
416 | hwdescr->buf_size = bufsize; |
417 | hwdescr->result_size = 0; | |
418 | hwdescr->valid_size = 0; | |
419 | hwdescr->data_status = 0; | |
420 | hwdescr->data_error = 0; | |
aaec0fab JO |
421 | |
422 | offset = ((unsigned long)descr->skb->data) & | |
423 | (SPIDER_NET_RXBUF_ALIGN - 1); | |
424 | if (offset) | |
425 | skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); | |
a4182c50 | 426 | /* iommu-map the skb */ |
8e0a613b | 427 | buf = pci_map_single(card->pdev, descr->skb->data, |
bdd01503 | 428 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
8d8bb39b | 429 | if (pci_dma_mapping_error(card->pdev, buf)) { |
aaec0fab | 430 | dev_kfree_skb_any(descr->skb); |
d9c199ee | 431 | descr->skb = NULL; |
11f1a52b | 432 | if (netif_msg_rx_err(card) && net_ratelimit()) |
e6311d85 | 433 | dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n"); |
9b6b0b81 | 434 | card->spider_stats.rx_iommu_map_error++; |
4cb6f9e5 | 435 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
aaec0fab | 436 | } else { |
4cb6f9e5 | 437 | hwdescr->buf_addr = buf; |
90476a20 | 438 | wmb(); |
4cb6f9e5 | 439 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | |
bdd01503 | 440 | SPIDER_NET_DMAC_NOINTR_COMPLETE; |
aaec0fab JO |
441 | } |
442 | ||
a4182c50 | 443 | return 0; |
aaec0fab JO |
444 | } |
445 | ||
446 | /** | |
11f1a52b | 447 | * spider_net_enable_rxchtails - sets RX dmac chain tail addresses |
aaec0fab JO |
448 | * @card: card structure |
449 | * | |
3ad2f3fb | 450 | * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the |
aaec0fab JO |
451 | * chip by writing to the appropriate register. DMA is enabled in |
452 | * spider_net_enable_rxdmac. | |
453 | */ | |
bdd01503 | 454 | static inline void |
aaec0fab JO |
455 | spider_net_enable_rxchtails(struct spider_net_card *card) |
456 | { | |
457 | /* assume chain is aligned correctly */ | |
458 | spider_net_write_reg(card, SPIDER_NET_GDADCHA , | |
459 | card->rx_chain.tail->bus_addr); | |
460 | } | |
461 | ||
462 | /** | |
463 | * spider_net_enable_rxdmac - enables a receive DMA controller | |
464 | * @card: card structure | |
465 | * | |
466 | * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN | |
467 | * in the GDADMACCNTR register | |
468 | */ | |
bdd01503 | 469 | static inline void |
aaec0fab JO |
470 | spider_net_enable_rxdmac(struct spider_net_card *card) |
471 | { | |
11f1a52b | 472 | wmb(); |
aaec0fab JO |
473 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, |
474 | SPIDER_NET_DMA_RX_VALUE); | |
475 | } | |
476 | ||
59a11f88 LV |
477 | /** |
478 | * spider_net_disable_rxdmac - disables the receive DMA controller | |
479 | * @card: card structure | |
480 | * | |
481 | * spider_net_disable_rxdmac terminates processing on the DMA controller | |
482 | * by turing off the DMA controller, with the force-end flag set. | |
483 | */ | |
484 | static inline void | |
485 | spider_net_disable_rxdmac(struct spider_net_card *card) | |
486 | { | |
487 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, | |
488 | SPIDER_NET_DMA_RX_FEND_VALUE); | |
489 | } | |
490 | ||
aaec0fab JO |
491 | /** |
492 | * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains | |
493 | * @card: card structure | |
494 | * | |
11f1a52b | 495 | * refills descriptors in the rx chain: allocates skbs and iommu-maps them. |
aaec0fab JO |
496 | */ |
497 | static void | |
498 | spider_net_refill_rx_chain(struct spider_net_card *card) | |
499 | { | |
bdd01503 JO |
500 | struct spider_net_descr_chain *chain = &card->rx_chain; |
501 | unsigned long flags; | |
aaec0fab | 502 | |
11f1a52b AB |
503 | /* one context doing the refill (and a second context seeing that |
504 | * and omitting it) is ok. If called by NAPI, we'll be called again | |
505 | * as spider_net_decode_one_descr is called several times. If some | |
506 | * interrupt calls us, the NAPI is about to clean up anyway. */ | |
bdd01503 JO |
507 | if (!spin_trylock_irqsave(&chain->lock, flags)) |
508 | return; | |
509 | ||
4cb6f9e5 | 510 | while (spider_net_get_descr_status(chain->head->hwdescr) == |
bdd01503 JO |
511 | SPIDER_NET_DESCR_NOT_IN_USE) { |
512 | if (spider_net_prepare_rx_descr(card, chain->head)) | |
513 | break; | |
514 | chain->head = chain->head->next; | |
515 | } | |
aaec0fab | 516 | |
bdd01503 | 517 | spin_unlock_irqrestore(&chain->lock, flags); |
aaec0fab JO |
518 | } |
519 | ||
520 | /** | |
2c307db7 | 521 | * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains |
aaec0fab JO |
522 | * @card: card structure |
523 | * | |
2c307db7 | 524 | * Returns 0 on success, <0 on failure. |
aaec0fab JO |
525 | */ |
526 | static int | |
527 | spider_net_alloc_rx_skbs(struct spider_net_card *card) | |
528 | { | |
2bf27a0d LV |
529 | struct spider_net_descr_chain *chain = &card->rx_chain; |
530 | struct spider_net_descr *start = chain->tail; | |
531 | struct spider_net_descr *descr = start; | |
aaec0fab | 532 | |
2bf27a0d LV |
533 | /* Link up the hardware chain pointers */ |
534 | do { | |
535 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; | |
536 | descr = descr->next; | |
537 | } while (descr != start); | |
aaec0fab | 538 | |
2c307db7 LV |
539 | /* Put at least one buffer into the chain. if this fails, |
540 | * we've got a problem. If not, spider_net_refill_rx_chain | |
541 | * will do the rest at the end of this function. */ | |
aaec0fab JO |
542 | if (spider_net_prepare_rx_descr(card, chain->head)) |
543 | goto error; | |
544 | else | |
545 | chain->head = chain->head->next; | |
546 | ||
2c307db7 LV |
547 | /* This will allocate the rest of the rx buffers; |
548 | * if not, it's business as usual later on. */ | |
aaec0fab | 549 | spider_net_refill_rx_chain(card); |
11f1a52b | 550 | spider_net_enable_rxdmac(card); |
aaec0fab JO |
551 | return 0; |
552 | ||
553 | error: | |
554 | spider_net_free_rx_chain_contents(card); | |
2bf27a0d | 555 | return -ENOMEM; |
aaec0fab JO |
556 | } |
557 | ||
aaec0fab JO |
558 | /** |
559 | * spider_net_get_multicast_hash - generates hash for multicast filter table | |
560 | * @addr: multicast address | |
561 | * | |
562 | * returns the hash value. | |
563 | * | |
564 | * spider_net_get_multicast_hash calculates a hash value for a given multicast | |
565 | * address, that is used to set the multicast filter tables | |
566 | */ | |
567 | static u8 | |
568 | spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) | |
569 | { | |
aaec0fab JO |
570 | u32 crc; |
571 | u8 hash; | |
11f1a52b AB |
572 | char addr_for_crc[ETH_ALEN] = { 0, }; |
573 | int i, bit; | |
574 | ||
575 | for (i = 0; i < ETH_ALEN * 8; i++) { | |
576 | bit = (addr[i / 8] >> (i % 8)) & 1; | |
577 | addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); | |
578 | } | |
aaec0fab | 579 | |
11f1a52b | 580 | crc = crc32_be(~0, addr_for_crc, netdev->addr_len); |
aaec0fab JO |
581 | |
582 | hash = (crc >> 27); | |
583 | hash <<= 3; | |
584 | hash |= crc & 7; | |
11f1a52b | 585 | hash &= 0xff; |
aaec0fab JO |
586 | |
587 | return hash; | |
588 | } | |
589 | ||
590 | /** | |
591 | * spider_net_set_multi - sets multicast addresses and promisc flags | |
592 | * @netdev: interface device structure | |
593 | * | |
594 | * spider_net_set_multi configures multicast addresses as needed for the | |
595 | * netdev interface. It also sets up multicast, allmulti and promisc | |
596 | * flags appropriately | |
597 | */ | |
598 | static void | |
599 | spider_net_set_multi(struct net_device *netdev) | |
600 | { | |
22bedad3 | 601 | struct netdev_hw_addr *ha; |
aaec0fab JO |
602 | u8 hash; |
603 | int i; | |
604 | u32 reg; | |
605 | struct spider_net_card *card = netdev_priv(netdev); | |
e26cc7ff | 606 | DECLARE_BITMAP(bitmask, SPIDER_NET_MULTICAST_HASHES) = {}; |
aaec0fab JO |
607 | |
608 | spider_net_set_promisc(card); | |
609 | ||
610 | if (netdev->flags & IFF_ALLMULTI) { | |
611 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { | |
612 | set_bit(i, bitmask); | |
613 | } | |
614 | goto write_hash; | |
615 | } | |
616 | ||
617 | /* well, we know, what the broadcast hash value is: it's xfd | |
618 | hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ | |
619 | set_bit(0xfd, bitmask); | |
620 | ||
22bedad3 JP |
621 | netdev_for_each_mc_addr(ha, netdev) { |
622 | hash = spider_net_get_multicast_hash(netdev, ha->addr); | |
aaec0fab JO |
623 | set_bit(hash, bitmask); |
624 | } | |
625 | ||
626 | write_hash: | |
627 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { | |
628 | reg = 0; | |
629 | if (test_bit(i * 4, bitmask)) | |
630 | reg += 0x08; | |
631 | reg <<= 8; | |
632 | if (test_bit(i * 4 + 1, bitmask)) | |
633 | reg += 0x08; | |
634 | reg <<= 8; | |
635 | if (test_bit(i * 4 + 2, bitmask)) | |
636 | reg += 0x08; | |
637 | reg <<= 8; | |
638 | if (test_bit(i * 4 + 3, bitmask)) | |
639 | reg += 0x08; | |
640 | ||
641 | spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); | |
642 | } | |
643 | } | |
644 | ||
aaec0fab JO |
645 | /** |
646 | * spider_net_prepare_tx_descr - fill tx descriptor with skb data | |
647 | * @card: card structure | |
aaec0fab JO |
648 | * @skb: packet to use |
649 | * | |
650 | * returns 0 on success, <0 on failure. | |
651 | * | |
652 | * fills out the descriptor structure with skb data and len. Copies data, | |
653 | * if needed (32bit DMA!) | |
654 | */ | |
655 | static int | |
656 | spider_net_prepare_tx_descr(struct spider_net_card *card, | |
aaec0fab JO |
657 | struct sk_buff *skb) |
658 | { | |
d9c199ee | 659 | struct spider_net_descr_chain *chain = &card->tx_chain; |
9cc7bf7e | 660 | struct spider_net_descr *descr; |
4cb6f9e5 | 661 | struct spider_net_hw_descr *hwdescr; |
11f1a52b | 662 | dma_addr_t buf; |
9cc7bf7e | 663 | unsigned long flags; |
11f1a52b | 664 | |
9c434f5e | 665 | buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); |
8d8bb39b | 666 | if (pci_dma_mapping_error(card->pdev, buf)) { |
11f1a52b | 667 | if (netif_msg_tx_err(card) && net_ratelimit()) |
e6311d85 | 668 | dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). " |
9c434f5e | 669 | "Dropping packet\n", skb->data, skb->len); |
9b6b0b81 | 670 | card->spider_stats.tx_iommu_map_error++; |
aaec0fab JO |
671 | return -ENOMEM; |
672 | } | |
673 | ||
d9c199ee | 674 | spin_lock_irqsave(&chain->lock, flags); |
9cc7bf7e | 675 | descr = card->tx_chain.head; |
d9c199ee LV |
676 | if (descr->next == chain->tail->prev) { |
677 | spin_unlock_irqrestore(&chain->lock, flags); | |
678 | pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); | |
679 | return -ENOMEM; | |
680 | } | |
4cb6f9e5 | 681 | hwdescr = descr->hwdescr; |
d9c199ee | 682 | chain->head = descr->next; |
9cc7bf7e | 683 | |
aaec0fab | 684 | descr->skb = skb; |
4cb6f9e5 LV |
685 | hwdescr->buf_addr = buf; |
686 | hwdescr->buf_size = skb->len; | |
687 | hwdescr->next_descr_addr = 0; | |
688 | hwdescr->data_status = 0; | |
aaec0fab | 689 | |
4cb6f9e5 | 690 | hwdescr->dmac_cmd_status = |
5f309b90 | 691 | SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL; |
d9c199ee | 692 | spin_unlock_irqrestore(&chain->lock, flags); |
9cc7bf7e | 693 | |
3a2c892d | 694 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
eddc9ec5 | 695 | switch (ip_hdr(skb)->protocol) { |
bdd01503 | 696 | case IPPROTO_TCP: |
4cb6f9e5 | 697 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; |
bdd01503 JO |
698 | break; |
699 | case IPPROTO_UDP: | |
4cb6f9e5 | 700 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; |
bdd01503 JO |
701 | break; |
702 | } | |
703 | ||
204e5fa1 | 704 | /* Chain the bus address, so that the DMA engine finds this descr. */ |
4cb6f9e5 LV |
705 | wmb(); |
706 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; | |
bdd01503 | 707 | |
860e9538 | 708 | netif_trans_update(card->netdev); /* set netdev watchdog timer */ |
bdd01503 JO |
709 | return 0; |
710 | } | |
711 | ||
a664ccf4 | 712 | static int |
204e5fa1 LV |
713 | spider_net_set_low_watermark(struct spider_net_card *card) |
714 | { | |
4cb6f9e5 LV |
715 | struct spider_net_descr *descr = card->tx_chain.tail; |
716 | struct spider_net_hw_descr *hwdescr; | |
9cc7bf7e | 717 | unsigned long flags; |
204e5fa1 LV |
718 | int status; |
719 | int cnt=0; | |
720 | int i; | |
204e5fa1 | 721 | |
9cc7bf7e LV |
722 | /* Measure the length of the queue. Measurement does not |
723 | * need to be precise -- does not need a lock. */ | |
204e5fa1 | 724 | while (descr != card->tx_chain.head) { |
4cb6f9e5 | 725 | status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; |
204e5fa1 LV |
726 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) |
727 | break; | |
728 | descr = descr->next; | |
729 | cnt++; | |
730 | } | |
731 | ||
732 | /* If TX queue is short, don't even bother with interrupts */ | |
d4ed8f8d | 733 | if (cnt < card->tx_chain.num_desc/4) |
a664ccf4 | 734 | return cnt; |
204e5fa1 LV |
735 | |
736 | /* Set low-watermark 3/4th's of the way into the queue. */ | |
737 | descr = card->tx_chain.tail; | |
738 | cnt = (cnt*3)/4; | |
739 | for (i=0;i<cnt; i++) | |
740 | descr = descr->next; | |
741 | ||
742 | /* Set the new watermark, clear the old watermark */ | |
9cc7bf7e | 743 | spin_lock_irqsave(&card->tx_chain.lock, flags); |
4cb6f9e5 LV |
744 | descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; |
745 | if (card->low_watermark && card->low_watermark != descr) { | |
746 | hwdescr = card->low_watermark->hwdescr; | |
747 | hwdescr->dmac_cmd_status = | |
748 | hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; | |
749 | } | |
204e5fa1 | 750 | card->low_watermark = descr; |
9cc7bf7e | 751 | spin_unlock_irqrestore(&card->tx_chain.lock, flags); |
a664ccf4 | 752 | return cnt; |
204e5fa1 LV |
753 | } |
754 | ||
bdd01503 JO |
755 | /** |
756 | * spider_net_release_tx_chain - processes sent tx descriptors | |
757 | * @card: adapter structure | |
758 | * @brutal: if set, don't care about whether descriptor seems to be in use | |
759 | * | |
760 | * returns 0 if the tx ring is empty, otherwise 1. | |
761 | * | |
762 | * spider_net_release_tx_chain releases the tx descriptors that spider has | |
763 | * finished with (if non-brutal) or simply release tx descriptors (if brutal). | |
764 | * If some other context is calling this function, we return 1 so that we're | |
26aca5ec | 765 | * scheduled again (if we were scheduled) and will not lose initiative. |
bdd01503 JO |
766 | */ |
767 | static int | |
768 | spider_net_release_tx_chain(struct spider_net_card *card, int brutal) | |
769 | { | |
09f75cd7 | 770 | struct net_device *dev = card->netdev; |
bdd01503 | 771 | struct spider_net_descr_chain *chain = &card->tx_chain; |
9cc7bf7e | 772 | struct spider_net_descr *descr; |
4cb6f9e5 | 773 | struct spider_net_hw_descr *hwdescr; |
9cc7bf7e LV |
774 | struct sk_buff *skb; |
775 | u32 buf_addr; | |
776 | unsigned long flags; | |
bdd01503 JO |
777 | int status; |
778 | ||
5c8e98fe | 779 | while (1) { |
9cc7bf7e | 780 | spin_lock_irqsave(&chain->lock, flags); |
5c8e98fe LV |
781 | if (chain->tail == chain->head) { |
782 | spin_unlock_irqrestore(&chain->lock, flags); | |
783 | return 0; | |
784 | } | |
9cc7bf7e | 785 | descr = chain->tail; |
4cb6f9e5 | 786 | hwdescr = descr->hwdescr; |
9cc7bf7e | 787 | |
4cb6f9e5 | 788 | status = spider_net_get_descr_status(hwdescr); |
bdd01503 JO |
789 | switch (status) { |
790 | case SPIDER_NET_DESCR_COMPLETE: | |
09f75cd7 JG |
791 | dev->stats.tx_packets++; |
792 | dev->stats.tx_bytes += descr->skb->len; | |
bdd01503 JO |
793 | break; |
794 | ||
795 | case SPIDER_NET_DESCR_CARDOWNED: | |
9cc7bf7e LV |
796 | if (!brutal) { |
797 | spin_unlock_irqrestore(&chain->lock, flags); | |
bdd01503 | 798 | return 1; |
9cc7bf7e LV |
799 | } |
800 | ||
bdd01503 JO |
801 | /* fallthrough, if we release the descriptors |
802 | * brutally (then we don't care about | |
803 | * SPIDER_NET_DESCR_CARDOWNED) */ | |
804 | ||
805 | case SPIDER_NET_DESCR_RESPONSE_ERROR: | |
806 | case SPIDER_NET_DESCR_PROTECTION_ERROR: | |
807 | case SPIDER_NET_DESCR_FORCE_END: | |
808 | if (netif_msg_tx_err(card)) | |
e6311d85 LV |
809 | dev_err(&card->netdev->dev, "forcing end of tx descriptor " |
810 | "with status x%02x\n", status); | |
09f75cd7 | 811 | dev->stats.tx_errors++; |
bdd01503 JO |
812 | break; |
813 | ||
814 | default: | |
09f75cd7 | 815 | dev->stats.tx_dropped++; |
9cc7bf7e LV |
816 | if (!brutal) { |
817 | spin_unlock_irqrestore(&chain->lock, flags); | |
c3fee4c5 | 818 | return 1; |
9cc7bf7e | 819 | } |
bdd01503 | 820 | } |
aaec0fab | 821 | |
9cc7bf7e | 822 | chain->tail = descr->next; |
4cb6f9e5 | 823 | hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; |
9cc7bf7e | 824 | skb = descr->skb; |
d9c199ee | 825 | descr->skb = NULL; |
4cb6f9e5 | 826 | buf_addr = hwdescr->buf_addr; |
9cc7bf7e LV |
827 | spin_unlock_irqrestore(&chain->lock, flags); |
828 | ||
829 | /* unmap the skb */ | |
830 | if (skb) { | |
9c434f5e JL |
831 | pci_unmap_single(card->pdev, buf_addr, skb->len, |
832 | PCI_DMA_TODEVICE); | |
20eca054 | 833 | dev_consume_skb_any(skb); |
9cc7bf7e LV |
834 | } |
835 | } | |
aaec0fab JO |
836 | return 0; |
837 | } | |
838 | ||
839 | /** | |
840 | * spider_net_kick_tx_dma - enables TX DMA processing | |
841 | * @card: card structure | |
aaec0fab | 842 | * |
a664ccf4 LV |
843 | * This routine will start the transmit DMA running if |
844 | * it is not already running. This routine ned only be | |
845 | * called when queueing a new packet to an empty tx queue. | |
846 | * Writes the current tx chain head as start address | |
847 | * of the tx descriptor chain and enables the transmission | |
848 | * DMA engine. | |
aaec0fab | 849 | */ |
bdd01503 JO |
850 | static inline void |
851 | spider_net_kick_tx_dma(struct spider_net_card *card) | |
aaec0fab | 852 | { |
bdd01503 | 853 | struct spider_net_descr *descr; |
aaec0fab | 854 | |
bdd01503 JO |
855 | if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & |
856 | SPIDER_NET_TX_DMA_EN) | |
857 | goto out; | |
aaec0fab | 858 | |
bdd01503 JO |
859 | descr = card->tx_chain.tail; |
860 | for (;;) { | |
4cb6f9e5 | 861 | if (spider_net_get_descr_status(descr->hwdescr) == |
bdd01503 JO |
862 | SPIDER_NET_DESCR_CARDOWNED) { |
863 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, | |
864 | descr->bus_addr); | |
865 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
866 | SPIDER_NET_DMA_TX_VALUE); | |
867 | break; | |
868 | } | |
869 | if (descr == card->tx_chain.head) | |
870 | break; | |
871 | descr = descr->next; | |
872 | } | |
873 | ||
874 | out: | |
875 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); | |
aaec0fab JO |
876 | } |
877 | ||
878 | /** | |
879 | * spider_net_xmit - transmits a frame over the device | |
880 | * @skb: packet to send out | |
881 | * @netdev: interface device structure | |
882 | * | |
bdd01503 | 883 | * returns 0 on success, !0 on failure |
aaec0fab JO |
884 | */ |
885 | static int | |
886 | spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) | |
887 | { | |
a664ccf4 | 888 | int cnt; |
aaec0fab | 889 | struct spider_net_card *card = netdev_priv(netdev); |
bdd01503 | 890 | |
11f1a52b | 891 | spider_net_release_tx_chain(card, 0); |
aaec0fab | 892 | |
d9c199ee | 893 | if (spider_net_prepare_tx_descr(card, skb) != 0) { |
09f75cd7 | 894 | netdev->stats.tx_dropped++; |
313ef4b7 LV |
895 | netif_stop_queue(netdev); |
896 | return NETDEV_TX_BUSY; | |
bdd01503 | 897 | } |
aaec0fab | 898 | |
a664ccf4 LV |
899 | cnt = spider_net_set_low_watermark(card); |
900 | if (cnt < 5) | |
901 | spider_net_kick_tx_dma(card); | |
313ef4b7 | 902 | return NETDEV_TX_OK; |
bdd01503 | 903 | } |
11f1a52b | 904 | |
bdd01503 JO |
905 | /** |
906 | * spider_net_cleanup_tx_ring - cleans up the TX ring | |
907 | * @card: card structure | |
908 | * | |
68a8c609 LV |
909 | * spider_net_cleanup_tx_ring is called by either the tx_timer |
910 | * or from the NAPI polling routine. | |
911 | * This routine releases resources associted with transmitted | |
912 | * packets, including updating the queue tail pointer. | |
bdd01503 JO |
913 | */ |
914 | static void | |
915 | spider_net_cleanup_tx_ring(struct spider_net_card *card) | |
916 | { | |
bdd01503 | 917 | if ((spider_net_release_tx_chain(card, 0) != 0) && |
313ef4b7 | 918 | (card->netdev->flags & IFF_UP)) { |
bdd01503 | 919 | spider_net_kick_tx_dma(card); |
313ef4b7 LV |
920 | netif_wake_queue(card->netdev); |
921 | } | |
aaec0fab JO |
922 | } |
923 | ||
924 | /** | |
925 | * spider_net_do_ioctl - called for device ioctls | |
926 | * @netdev: interface device structure | |
927 | * @ifr: request parameter structure for ioctl | |
928 | * @cmd: command code for ioctl | |
929 | * | |
930 | * returns 0 on success, <0 on failure. Currently, we have no special ioctls. | |
931 | * -EOPNOTSUPP is returned, if an unknown ioctl was requested | |
932 | */ | |
933 | static int | |
934 | spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
935 | { | |
936 | switch (cmd) { | |
937 | default: | |
938 | return -EOPNOTSUPP; | |
939 | } | |
940 | } | |
941 | ||
942 | /** | |
943 | * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on | |
944 | * @descr: descriptor to process | |
945 | * @card: card structure | |
946 | * | |
05b346b5 LV |
947 | * Fills out skb structure and passes the data to the stack. |
948 | * The descriptor state is not changed. | |
aaec0fab | 949 | */ |
7f7223b8 | 950 | static void |
aaec0fab | 951 | spider_net_pass_skb_up(struct spider_net_descr *descr, |
1cd173f6 | 952 | struct spider_net_card *card) |
aaec0fab | 953 | { |
09f75cd7 JG |
954 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
955 | struct sk_buff *skb = descr->skb; | |
956 | struct net_device *netdev = card->netdev; | |
957 | u32 data_status = hwdescr->data_status; | |
958 | u32 data_error = hwdescr->data_error; | |
aaec0fab | 959 | |
4cb6f9e5 | 960 | skb_put(skb, hwdescr->valid_size); |
aaec0fab JO |
961 | |
962 | /* the card seems to add 2 bytes of junk in front | |
963 | * of the ethernet frame */ | |
964 | #define SPIDER_MISALIGN 2 | |
965 | skb_pull(skb, SPIDER_MISALIGN); | |
966 | skb->protocol = eth_type_trans(skb, netdev); | |
967 | ||
968 | /* checksum offload */ | |
6de240b7 MM |
969 | skb_checksum_none_assert(skb); |
970 | if (netdev->features & NETIF_F_RXCSUM) { | |
11f1a52b AB |
971 | if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == |
972 | SPIDER_NET_DATA_STATUS_CKSUM_MASK) && | |
973 | !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) | |
aaec0fab | 974 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
6de240b7 | 975 | } |
aaec0fab JO |
976 | |
977 | if (data_status & SPIDER_NET_VLAN_PACKET) { | |
9c5d0614 | 978 | /* further enhancements: HW-accel VLAN */ |
aaec0fab JO |
979 | } |
980 | ||
aaec0fab | 981 | /* update netdevice statistics */ |
09f75cd7 JG |
982 | netdev->stats.rx_packets++; |
983 | netdev->stats.rx_bytes += skb->len; | |
93c1d3b7 FM |
984 | |
985 | /* pass skb up to stack */ | |
986 | netif_receive_skb(skb); | |
aaec0fab JO |
987 | } |
988 | ||
6d24998f LV |
989 | static void show_rx_chain(struct spider_net_card *card) |
990 | { | |
991 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
992 | struct spider_net_descr *start= chain->tail; | |
993 | struct spider_net_descr *descr= start; | |
9948357d LV |
994 | struct spider_net_hw_descr *hwd = start->hwdescr; |
995 | struct device *dev = &card->netdev->dev; | |
996 | u32 curr_desc, next_desc; | |
6d24998f LV |
997 | int status; |
998 | ||
9948357d | 999 | int tot = 0; |
6d24998f | 1000 | int cnt = 0; |
9948357d LV |
1001 | int off = start - chain->ring; |
1002 | int cstat = hwd->dmac_cmd_status; | |
1003 | ||
1004 | dev_info(dev, "Total number of descrs=%d\n", | |
1005 | chain->num_desc); | |
1006 | dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n", | |
1007 | off, cstat); | |
1008 | ||
1009 | curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA); | |
1010 | next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA); | |
1011 | ||
6d24998f LV |
1012 | status = cstat; |
1013 | do | |
1014 | { | |
9948357d LV |
1015 | hwd = descr->hwdescr; |
1016 | off = descr - chain->ring; | |
1017 | status = hwd->dmac_cmd_status; | |
1018 | ||
1019 | if (descr == chain->head) | |
1020 | dev_info(dev, "Chain head is at %d, head status=0x%x\n", | |
1021 | off, status); | |
1022 | ||
1023 | if (curr_desc == descr->bus_addr) | |
1024 | dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n", | |
1025 | off, status); | |
1026 | ||
1027 | if (next_desc == descr->bus_addr) | |
1028 | dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n", | |
1029 | off, status); | |
1030 | ||
1031 | if (hwd->next_descr_addr == 0) | |
1032 | dev_info(dev, "chain is cut at %d\n", off); | |
1033 | ||
6d24998f | 1034 | if (cstat != status) { |
9948357d LV |
1035 | int from = (chain->num_desc + off - cnt) % chain->num_desc; |
1036 | int to = (chain->num_desc + off - 1) % chain->num_desc; | |
1037 | dev_info(dev, "Have %d (from %d to %d) descrs " | |
1038 | "with stat=0x%08x\n", cnt, from, to, cstat); | |
6d24998f LV |
1039 | cstat = status; |
1040 | cnt = 0; | |
1041 | } | |
9948357d | 1042 | |
6d24998f | 1043 | cnt ++; |
9948357d LV |
1044 | tot ++; |
1045 | descr = descr->next; | |
1046 | } while (descr != start); | |
1047 | ||
1048 | dev_info(dev, "Last %d descrs with stat=0x%08x " | |
1049 | "for a total of %d descrs\n", cnt, cstat, tot); | |
1050 | ||
1051 | #ifdef DEBUG | |
1052 | /* Now dump the whole ring */ | |
1053 | descr = start; | |
1054 | do | |
1055 | { | |
1056 | struct spider_net_hw_descr *hwd = descr->hwdescr; | |
1057 | status = spider_net_get_descr_status(hwd); | |
1058 | cnt = descr - chain->ring; | |
1059 | dev_info(dev, "Descr %d stat=0x%08x skb=%p\n", | |
1060 | cnt, status, descr->skb); | |
1061 | dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n", | |
1062 | descr->bus_addr, hwd->buf_addr, hwd->buf_size); | |
1063 | dev_info(dev, "next=%08x result sz=%d valid sz=%d\n", | |
1064 | hwd->next_descr_addr, hwd->result_size, | |
1065 | hwd->valid_size); | |
1066 | dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n", | |
1067 | hwd->dmac_cmd_status, hwd->data_status, | |
1068 | hwd->data_error); | |
1069 | dev_info(dev, "\n"); | |
1070 | ||
6d24998f LV |
1071 | descr = descr->next; |
1072 | } while (descr != start); | |
6d24998f LV |
1073 | #endif |
1074 | ||
9948357d LV |
1075 | } |
1076 | ||
4c4bd5a9 LV |
1077 | /** |
1078 | * spider_net_resync_head_ptr - Advance head ptr past empty descrs | |
1079 | * | |
1080 | * If the driver fails to keep up and empty the queue, then the | |
1081 | * hardware wil run out of room to put incoming packets. This | |
1082 | * will cause the hardware to skip descrs that are full (instead | |
1083 | * of halting/retrying). Thus, once the driver runs, it wil need | |
1084 | * to "catch up" to where the hardware chain pointer is at. | |
1085 | */ | |
1086 | static void spider_net_resync_head_ptr(struct spider_net_card *card) | |
1087 | { | |
1088 | unsigned long flags; | |
1089 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1090 | struct spider_net_descr *descr; | |
1091 | int i, status; | |
1092 | ||
1093 | /* Advance head pointer past any empty descrs */ | |
1094 | descr = chain->head; | |
1095 | status = spider_net_get_descr_status(descr->hwdescr); | |
1096 | ||
1097 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) | |
1098 | return; | |
1099 | ||
1100 | spin_lock_irqsave(&chain->lock, flags); | |
1101 | ||
1102 | descr = chain->head; | |
1103 | status = spider_net_get_descr_status(descr->hwdescr); | |
1104 | for (i=0; i<chain->num_desc; i++) { | |
1105 | if (status != SPIDER_NET_DESCR_CARDOWNED) break; | |
1106 | descr = descr->next; | |
1107 | status = spider_net_get_descr_status(descr->hwdescr); | |
1108 | } | |
1109 | chain->head = descr; | |
1110 | ||
1111 | spin_unlock_irqrestore(&chain->lock, flags); | |
1112 | } | |
1113 | ||
1114 | static int spider_net_resync_tail_ptr(struct spider_net_card *card) | |
1115 | { | |
1116 | struct spider_net_descr_chain *chain = &card->rx_chain; | |
1117 | struct spider_net_descr *descr; | |
1118 | int i, status; | |
1119 | ||
1120 | /* Advance tail pointer past any empty and reaped descrs */ | |
1121 | descr = chain->tail; | |
1122 | status = spider_net_get_descr_status(descr->hwdescr); | |
1123 | ||
1124 | for (i=0; i<chain->num_desc; i++) { | |
1125 | if ((status != SPIDER_NET_DESCR_CARDOWNED) && | |
1126 | (status != SPIDER_NET_DESCR_NOT_IN_USE)) break; | |
1127 | descr = descr->next; | |
1128 | status = spider_net_get_descr_status(descr->hwdescr); | |
1129 | } | |
1130 | chain->tail = descr; | |
1131 | ||
1132 | if ((i == chain->num_desc) || (i == 0)) | |
1133 | return 1; | |
1134 | return 0; | |
1135 | } | |
1136 | ||
aaec0fab | 1137 | /** |
7376e732 | 1138 | * spider_net_decode_one_descr - processes an RX descriptor |
aaec0fab JO |
1139 | * @card: card structure |
1140 | * | |
7376e732 | 1141 | * Returns 1 if a packet has been sent to the stack, otherwise 0. |
aaec0fab | 1142 | * |
7376e732 LV |
1143 | * Processes an RX descriptor by iommu-unmapping the data buffer |
1144 | * and passing the packet up to the stack. This function is called | |
1145 | * in softirq context, e.g. either bottom half from interrupt or | |
1146 | * NAPI polling context. | |
aaec0fab JO |
1147 | */ |
1148 | static int | |
1cd173f6 | 1149 | spider_net_decode_one_descr(struct spider_net_card *card) |
aaec0fab | 1150 | { |
09f75cd7 | 1151 | struct net_device *dev = card->netdev; |
bdd01503 JO |
1152 | struct spider_net_descr_chain *chain = &card->rx_chain; |
1153 | struct spider_net_descr *descr = chain->tail; | |
4cb6f9e5 | 1154 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
9e0a6e25 | 1155 | u32 hw_buf_addr; |
bdd01503 | 1156 | int status; |
aaec0fab | 1157 | |
4cb6f9e5 | 1158 | status = spider_net_get_descr_status(hwdescr); |
aaec0fab | 1159 | |
80dab7c7 LV |
1160 | /* Nothing in the descriptor, or ring must be empty */ |
1161 | if ((status == SPIDER_NET_DESCR_CARDOWNED) || | |
1162 | (status == SPIDER_NET_DESCR_NOT_IN_USE)) | |
1cd173f6 | 1163 | return 0; |
aaec0fab | 1164 | |
11f1a52b | 1165 | /* descriptor definitively used -- move on tail */ |
aaec0fab JO |
1166 | chain->tail = descr->next; |
1167 | ||
05b346b5 | 1168 | /* unmap descriptor */ |
9e0a6e25 LV |
1169 | hw_buf_addr = hwdescr->buf_addr; |
1170 | hwdescr->buf_addr = 0xffffffff; | |
1171 | pci_unmap_single(card->pdev, hw_buf_addr, | |
05b346b5 LV |
1172 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
1173 | ||
aaec0fab JO |
1174 | if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || |
1175 | (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || | |
1176 | (status == SPIDER_NET_DESCR_FORCE_END) ) { | |
1177 | if (netif_msg_rx_err(card)) | |
09f75cd7 | 1178 | dev_err(&dev->dev, |
e6311d85 | 1179 | "dropping RX descriptor with state %d\n", status); |
09f75cd7 | 1180 | dev->stats.rx_dropped++; |
7f7223b8 | 1181 | goto bad_desc; |
aaec0fab JO |
1182 | } |
1183 | ||
1184 | if ( (status != SPIDER_NET_DESCR_COMPLETE) && | |
1185 | (status != SPIDER_NET_DESCR_FRAME_END) ) { | |
5a028877 | 1186 | if (netif_msg_rx_err(card)) |
e6311d85 LV |
1187 | dev_err(&card->netdev->dev, |
1188 | "RX descriptor with unknown state %d\n", status); | |
5a028877 | 1189 | card->spider_stats.rx_desc_unk_state++; |
7f7223b8 | 1190 | goto bad_desc; |
aaec0fab JO |
1191 | } |
1192 | ||
366684bd | 1193 | /* The cases we'll throw away the packet immediately */ |
4cb6f9e5 | 1194 | if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) { |
366684bd | 1195 | if (netif_msg_rx_err(card)) |
e6311d85 LV |
1196 | dev_err(&card->netdev->dev, |
1197 | "error in received descriptor found, " | |
366684bd | 1198 | "data_status=x%08x, data_error=x%08x\n", |
4cb6f9e5 | 1199 | hwdescr->data_status, hwdescr->data_error); |
7f7223b8 | 1200 | goto bad_desc; |
366684bd LV |
1201 | } |
1202 | ||
e65bbf13 | 1203 | if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) { |
e6311d85 | 1204 | dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", |
4cb6f9e5 | 1205 | hwdescr->dmac_cmd_status); |
9e0a6e25 | 1206 | pr_err("buf_addr=x%08x\n", hw_buf_addr); |
4cb6f9e5 LV |
1207 | pr_err("buf_size=x%08x\n", hwdescr->buf_size); |
1208 | pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); | |
1209 | pr_err("result_size=x%08x\n", hwdescr->result_size); | |
1210 | pr_err("valid_size=x%08x\n", hwdescr->valid_size); | |
1211 | pr_err("data_status=x%08x\n", hwdescr->data_status); | |
1212 | pr_err("data_error=x%08x\n", hwdescr->data_error); | |
6d24998f LV |
1213 | pr_err("which=%ld\n", descr - card->rx_chain.ring); |
1214 | ||
1215 | card->spider_stats.rx_desc_error++; | |
1216 | goto bad_desc; | |
1217 | } | |
1218 | ||
7f7223b8 LV |
1219 | /* Ok, we've got a packet in descr */ |
1220 | spider_net_pass_skb_up(descr, card); | |
83d35145 | 1221 | descr->skb = NULL; |
4cb6f9e5 | 1222 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
7f7223b8 LV |
1223 | return 1; |
1224 | ||
1225 | bad_desc: | |
9948357d LV |
1226 | if (netif_msg_rx_err(card)) |
1227 | show_rx_chain(card); | |
7f7223b8 | 1228 | dev_kfree_skb_irq(descr->skb); |
d9c199ee | 1229 | descr->skb = NULL; |
4cb6f9e5 | 1230 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
7f7223b8 | 1231 | return 0; |
aaec0fab JO |
1232 | } |
1233 | ||
1234 | /** | |
1235 | * spider_net_poll - NAPI poll function called by the stack to return packets | |
1236 | * @netdev: interface device structure | |
1237 | * @budget: number of packets we can pass to the stack at most | |
1238 | * | |
1239 | * returns 0 if no more packets available to the driver/stack. Returns 1, | |
1240 | * if the quota is exceeded, but the driver has still packets. | |
1241 | * | |
1242 | * spider_net_poll returns all packets from the rx descriptors to the stack | |
1243 | * (using netif_receive_skb). If all/enough packets are up, the driver | |
1244 | * reenables interrupts and returns 0. If not, 1 is returned. | |
1245 | */ | |
bea3348e | 1246 | static int spider_net_poll(struct napi_struct *napi, int budget) |
aaec0fab | 1247 | { |
bea3348e | 1248 | struct spider_net_card *card = container_of(napi, struct spider_net_card, napi); |
bea3348e SH |
1249 | int packets_done = 0; |
1250 | ||
1251 | while (packets_done < budget) { | |
1252 | if (!spider_net_decode_one_descr(card)) | |
aaec0fab | 1253 | break; |
bea3348e SH |
1254 | |
1255 | packets_done++; | |
aaec0fab JO |
1256 | } |
1257 | ||
4c4bd5a9 | 1258 | if ((packets_done == 0) && (card->num_rx_ints != 0)) { |
bea3348e SH |
1259 | if (!spider_net_resync_tail_ptr(card)) |
1260 | packets_done = budget; | |
4c4bd5a9 LV |
1261 | spider_net_resync_head_ptr(card); |
1262 | } | |
1263 | card->num_rx_ints = 0; | |
1264 | ||
11f1a52b | 1265 | spider_net_refill_rx_chain(card); |
80dab7c7 | 1266 | spider_net_enable_rxdmac(card); |
aaec0fab | 1267 | |
e1fd9070 LV |
1268 | spider_net_cleanup_tx_ring(card); |
1269 | ||
aaec0fab JO |
1270 | /* if all packets are in the stack, enable interrupts and return 0 */ |
1271 | /* if not, return 1 */ | |
bea3348e | 1272 | if (packets_done < budget) { |
288379f0 | 1273 | napi_complete(napi); |
aaec0fab | 1274 | spider_net_rx_irq_on(card); |
c3d1182a | 1275 | card->ignore_rx_ramfull = 0; |
aaec0fab JO |
1276 | } |
1277 | ||
bea3348e | 1278 | return packets_done; |
aaec0fab JO |
1279 | } |
1280 | ||
aaec0fab JO |
1281 | /** |
1282 | * spider_net_change_mtu - changes the MTU of an interface | |
1283 | * @netdev: interface device structure | |
1284 | * @new_mtu: new MTU value | |
1285 | * | |
1286 | * returns 0 on success, <0 on failure | |
1287 | */ | |
1288 | static int | |
1289 | spider_net_change_mtu(struct net_device *netdev, int new_mtu) | |
1290 | { | |
1291 | /* no need to re-alloc skbs or so -- the max mtu is about 2.3k | |
1292 | * and mtu is outbound only anyway */ | |
1293 | if ( (new_mtu < SPIDER_NET_MIN_MTU ) || | |
1294 | (new_mtu > SPIDER_NET_MAX_MTU) ) | |
1295 | return -EINVAL; | |
1296 | netdev->mtu = new_mtu; | |
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | /** | |
1301 | * spider_net_set_mac - sets the MAC of an interface | |
1302 | * @netdev: interface device structure | |
1303 | * @ptr: pointer to new MAC address | |
1304 | * | |
1305 | * Returns 0 on success, <0 on failure. Currently, we don't support this | |
1306 | * and will always return EOPNOTSUPP. | |
1307 | */ | |
1308 | static int | |
1309 | spider_net_set_mac(struct net_device *netdev, void *p) | |
1310 | { | |
1311 | struct spider_net_card *card = netdev_priv(netdev); | |
054034db | 1312 | u32 macl, macu, regvalue; |
aaec0fab JO |
1313 | struct sockaddr *addr = p; |
1314 | ||
aaec0fab JO |
1315 | if (!is_valid_ether_addr(addr->sa_data)) |
1316 | return -EADDRNOTAVAIL; | |
1317 | ||
0f6a6701 AT |
1318 | memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN); |
1319 | ||
054034db JO |
1320 | /* switch off GMACTPE and GMACRPE */ |
1321 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1322 | regvalue &= ~((1 << 5) | (1 << 6)); | |
1323 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1324 | ||
1325 | /* write mac */ | |
96aacede AT |
1326 | macu = (netdev->dev_addr[0]<<24) + (netdev->dev_addr[1]<<16) + |
1327 | (netdev->dev_addr[2]<<8) + (netdev->dev_addr[3]); | |
1328 | macl = (netdev->dev_addr[4]<<8) + (netdev->dev_addr[5]); | |
aaec0fab JO |
1329 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); |
1330 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); | |
1331 | ||
054034db JO |
1332 | /* switch GMACTPE and GMACRPE back on */ |
1333 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); | |
1334 | regvalue |= ((1 << 5) | (1 << 6)); | |
1335 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); | |
1336 | ||
aaec0fab JO |
1337 | spider_net_set_promisc(card); |
1338 | ||
aaec0fab JO |
1339 | return 0; |
1340 | } | |
1341 | ||
abdb66b5 KI |
1342 | /** |
1343 | * spider_net_link_reset | |
1344 | * @netdev: net device structure | |
1345 | * | |
1346 | * This is called when the PHY_LINK signal is asserted. For the blade this is | |
1347 | * not connected so we should never get here. | |
1348 | * | |
1349 | */ | |
1350 | static void | |
1351 | spider_net_link_reset(struct net_device *netdev) | |
1352 | { | |
1353 | ||
1354 | struct spider_net_card *card = netdev_priv(netdev); | |
1355 | ||
1356 | del_timer_sync(&card->aneg_timer); | |
1357 | ||
1358 | /* clear interrupt, block further interrupts */ | |
1359 | spider_net_write_reg(card, SPIDER_NET_GMACST, | |
1360 | spider_net_read_reg(card, SPIDER_NET_GMACST)); | |
1361 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); | |
1362 | ||
1363 | /* reset phy and setup aneg */ | |
81971bef IK |
1364 | card->aneg_count = 0; |
1365 | card->medium = BCM54XX_COPPER; | |
abdb66b5 KI |
1366 | spider_net_setup_aneg(card); |
1367 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1368 | ||
1369 | } | |
1370 | ||
aaec0fab JO |
1371 | /** |
1372 | * spider_net_handle_error_irq - handles errors raised by an interrupt | |
1373 | * @card: card structure | |
1374 | * @status_reg: interrupt status register 0 (GHIINT0STS) | |
1375 | * | |
1376 | * spider_net_handle_error_irq treats or ignores all error conditions | |
1377 | * found when an interrupt is presented | |
1378 | */ | |
1379 | static void | |
9a11fcb5 IK |
1380 | spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg, |
1381 | u32 error_reg1, u32 error_reg2) | |
aaec0fab | 1382 | { |
aaec0fab JO |
1383 | u32 i; |
1384 | int show_error = 1; | |
1385 | ||
aaec0fab JO |
1386 | /* check GHIINT0STS ************************************/ |
1387 | if (status_reg) | |
1388 | for (i = 0; i < 32; i++) | |
1389 | if (status_reg & (1<<i)) | |
1390 | switch (i) | |
1391 | { | |
1392 | /* let error_reg1 and error_reg2 evaluation decide, what to do | |
1393 | case SPIDER_NET_PHYINT: | |
1394 | case SPIDER_NET_GMAC2INT: | |
1395 | case SPIDER_NET_GMAC1INT: | |
aaec0fab JO |
1396 | case SPIDER_NET_GFIFOINT: |
1397 | case SPIDER_NET_DMACINT: | |
1398 | case SPIDER_NET_GSYSINT: | |
1399 | break; */ | |
1400 | ||
98b9040c LV |
1401 | case SPIDER_NET_GIPSINT: |
1402 | show_error = 0; | |
1403 | break; | |
1404 | ||
aaec0fab JO |
1405 | case SPIDER_NET_GPWOPCMPINT: |
1406 | /* PHY write operation completed */ | |
1407 | show_error = 0; | |
1408 | break; | |
1409 | case SPIDER_NET_GPROPCMPINT: | |
1410 | /* PHY read operation completed */ | |
1411 | /* we don't use semaphores, as we poll for the completion | |
1412 | * of the read operation in spider_net_read_phy. Should take | |
1413 | * about 50 us */ | |
1414 | show_error = 0; | |
1415 | break; | |
1416 | case SPIDER_NET_GPWFFINT: | |
1417 | /* PHY command queue full */ | |
1418 | if (netif_msg_intr(card)) | |
e6311d85 | 1419 | dev_err(&card->netdev->dev, "PHY write queue full\n"); |
aaec0fab JO |
1420 | show_error = 0; |
1421 | break; | |
1422 | ||
1423 | /* case SPIDER_NET_GRMDADRINT: not used. print a message */ | |
1424 | /* case SPIDER_NET_GRMARPINT: not used. print a message */ | |
1425 | /* case SPIDER_NET_GRMMPINT: not used. print a message */ | |
1426 | ||
1427 | case SPIDER_NET_GDTDEN0INT: | |
1428 | /* someone has set TX_DMA_EN to 0 */ | |
1429 | show_error = 0; | |
1430 | break; | |
1431 | ||
1432 | case SPIDER_NET_GDDDEN0INT: /* fallthrough */ | |
1433 | case SPIDER_NET_GDCDEN0INT: /* fallthrough */ | |
1434 | case SPIDER_NET_GDBDEN0INT: /* fallthrough */ | |
1435 | case SPIDER_NET_GDADEN0INT: | |
1436 | /* someone has set RX_DMA_EN to 0 */ | |
1437 | show_error = 0; | |
1438 | break; | |
1439 | ||
1440 | /* RX interrupts */ | |
1441 | case SPIDER_NET_GDDFDCINT: | |
1442 | case SPIDER_NET_GDCFDCINT: | |
1443 | case SPIDER_NET_GDBFDCINT: | |
1444 | case SPIDER_NET_GDAFDCINT: | |
1445 | /* case SPIDER_NET_GDNMINT: not used. print a message */ | |
1446 | /* case SPIDER_NET_GCNMINT: not used. print a message */ | |
1447 | /* case SPIDER_NET_GBNMINT: not used. print a message */ | |
1448 | /* case SPIDER_NET_GANMINT: not used. print a message */ | |
1449 | /* case SPIDER_NET_GRFNMINT: not used. print a message */ | |
1450 | show_error = 0; | |
1451 | break; | |
1452 | ||
1453 | /* TX interrupts */ | |
1454 | case SPIDER_NET_GDTFDCINT: | |
1455 | show_error = 0; | |
1456 | break; | |
1457 | case SPIDER_NET_GTTEDINT: | |
1458 | show_error = 0; | |
1459 | break; | |
1460 | case SPIDER_NET_GDTDCEINT: | |
1461 | /* chain end. If a descriptor should be sent, kick off | |
1462 | * tx dma | |
98b9040c | 1463 | if (card->tx_chain.tail != card->tx_chain.head) |
aaec0fab | 1464 | spider_net_kick_tx_dma(card); |
98b9040c LV |
1465 | */ |
1466 | show_error = 0; | |
aaec0fab JO |
1467 | break; |
1468 | ||
1469 | /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ | |
1470 | /* case SPIDER_NET_GFREECNTINT: not used. print a message */ | |
1471 | } | |
1472 | ||
1473 | /* check GHIINT1STS ************************************/ | |
1474 | if (error_reg1) | |
1475 | for (i = 0; i < 32; i++) | |
1476 | if (error_reg1 & (1<<i)) | |
1477 | switch (i) | |
1478 | { | |
1479 | case SPIDER_NET_GTMFLLINT: | |
fc8e13da IK |
1480 | /* TX RAM full may happen on a usual case. |
1481 | * Logging is not needed. */ | |
aaec0fab JO |
1482 | show_error = 0; |
1483 | break; | |
11f1a52b AB |
1484 | case SPIDER_NET_GRFDFLLINT: /* fallthrough */ |
1485 | case SPIDER_NET_GRFCFLLINT: /* fallthrough */ | |
1486 | case SPIDER_NET_GRFBFLLINT: /* fallthrough */ | |
1487 | case SPIDER_NET_GRFAFLLINT: /* fallthrough */ | |
aaec0fab | 1488 | case SPIDER_NET_GRMFLLINT: |
4c4bd5a9 | 1489 | /* Could happen when rx chain is full */ |
c3d1182a LV |
1490 | if (card->ignore_rx_ramfull == 0) { |
1491 | card->ignore_rx_ramfull = 1; | |
1492 | spider_net_resync_head_ptr(card); | |
1493 | spider_net_refill_rx_chain(card); | |
1494 | spider_net_enable_rxdmac(card); | |
1495 | card->num_rx_ints ++; | |
288379f0 | 1496 | napi_schedule(&card->napi); |
c3d1182a | 1497 | } |
11f1a52b | 1498 | show_error = 0; |
aaec0fab JO |
1499 | break; |
1500 | ||
1501 | /* case SPIDER_NET_GTMSHTINT: problem, print a message */ | |
1502 | case SPIDER_NET_GDTINVDINT: | |
1503 | /* allrighty. tx from previous descr ok */ | |
1504 | show_error = 0; | |
1505 | break; | |
aaec0fab JO |
1506 | |
1507 | /* chain end */ | |
1508 | case SPIDER_NET_GDDDCEINT: /* fallthrough */ | |
1509 | case SPIDER_NET_GDCDCEINT: /* fallthrough */ | |
1510 | case SPIDER_NET_GDBDCEINT: /* fallthrough */ | |
1511 | case SPIDER_NET_GDADCEINT: | |
4c4bd5a9 | 1512 | spider_net_resync_head_ptr(card); |
aaec0fab | 1513 | spider_net_refill_rx_chain(card); |
11f1a52b | 1514 | spider_net_enable_rxdmac(card); |
4c4bd5a9 | 1515 | card->num_rx_ints ++; |
288379f0 | 1516 | napi_schedule(&card->napi); |
aaec0fab JO |
1517 | show_error = 0; |
1518 | break; | |
1519 | ||
1520 | /* invalid descriptor */ | |
1521 | case SPIDER_NET_GDDINVDINT: /* fallthrough */ | |
1522 | case SPIDER_NET_GDCINVDINT: /* fallthrough */ | |
1523 | case SPIDER_NET_GDBINVDINT: /* fallthrough */ | |
1524 | case SPIDER_NET_GDAINVDINT: | |
4c4bd5a9 LV |
1525 | /* Could happen when rx chain is full */ |
1526 | spider_net_resync_head_ptr(card); | |
aaec0fab | 1527 | spider_net_refill_rx_chain(card); |
11f1a52b | 1528 | spider_net_enable_rxdmac(card); |
4c4bd5a9 | 1529 | card->num_rx_ints ++; |
288379f0 | 1530 | napi_schedule(&card->napi); |
aaec0fab JO |
1531 | show_error = 0; |
1532 | break; | |
1533 | ||
1534 | /* case SPIDER_NET_GDTRSERINT: problem, print a message */ | |
1535 | /* case SPIDER_NET_GDDRSERINT: problem, print a message */ | |
1536 | /* case SPIDER_NET_GDCRSERINT: problem, print a message */ | |
1537 | /* case SPIDER_NET_GDBRSERINT: problem, print a message */ | |
1538 | /* case SPIDER_NET_GDARSERINT: problem, print a message */ | |
1539 | /* case SPIDER_NET_GDSERINT: problem, print a message */ | |
1540 | /* case SPIDER_NET_GDTPTERINT: problem, print a message */ | |
1541 | /* case SPIDER_NET_GDDPTERINT: problem, print a message */ | |
1542 | /* case SPIDER_NET_GDCPTERINT: problem, print a message */ | |
1543 | /* case SPIDER_NET_GDBPTERINT: problem, print a message */ | |
1544 | /* case SPIDER_NET_GDAPTERINT: problem, print a message */ | |
1545 | default: | |
1546 | show_error = 1; | |
1547 | break; | |
1548 | } | |
1549 | ||
1550 | /* check GHIINT2STS ************************************/ | |
1551 | if (error_reg2) | |
1552 | for (i = 0; i < 32; i++) | |
1553 | if (error_reg2 & (1<<i)) | |
1554 | switch (i) | |
1555 | { | |
1556 | /* there is nothing we can (want to) do at this time. Log a | |
1557 | * message, we can switch on and off the specific values later on | |
1558 | case SPIDER_NET_GPROPERINT: | |
1559 | case SPIDER_NET_GMCTCRSNGINT: | |
1560 | case SPIDER_NET_GMCTLCOLINT: | |
1561 | case SPIDER_NET_GMCTTMOTINT: | |
1562 | case SPIDER_NET_GMCRCAERINT: | |
1563 | case SPIDER_NET_GMCRCALERINT: | |
1564 | case SPIDER_NET_GMCRALNERINT: | |
1565 | case SPIDER_NET_GMCROVRINT: | |
1566 | case SPIDER_NET_GMCRRNTINT: | |
1567 | case SPIDER_NET_GMCRRXERINT: | |
1568 | case SPIDER_NET_GTITCSERINT: | |
1569 | case SPIDER_NET_GTIFMTERINT: | |
1570 | case SPIDER_NET_GTIPKTRVKINT: | |
1571 | case SPIDER_NET_GTISPINGINT: | |
1572 | case SPIDER_NET_GTISADNGINT: | |
1573 | case SPIDER_NET_GTISPDNGINT: | |
1574 | case SPIDER_NET_GRIFMTERINT: | |
1575 | case SPIDER_NET_GRIPKTRVKINT: | |
1576 | case SPIDER_NET_GRISPINGINT: | |
1577 | case SPIDER_NET_GRISADNGINT: | |
1578 | case SPIDER_NET_GRISPDNGINT: | |
1579 | break; | |
1580 | */ | |
1581 | default: | |
1582 | break; | |
1583 | } | |
1584 | ||
5a028877 | 1585 | if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) |
e6311d85 | 1586 | dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, " |
aaec0fab JO |
1587 | "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", |
1588 | status_reg, error_reg1, error_reg2); | |
1589 | ||
1590 | /* clear interrupt sources */ | |
1591 | spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); | |
1592 | spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); | |
1593 | } | |
1594 | ||
1595 | /** | |
1596 | * spider_net_interrupt - interrupt handler for spider_net | |
3a4fa0a2 | 1597 | * @irq: interrupt number |
aaec0fab | 1598 | * @ptr: pointer to net_device |
aaec0fab JO |
1599 | * |
1600 | * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no | |
1601 | * interrupt found raised by card. | |
1602 | * | |
1603 | * This is the interrupt handler, that turns off | |
1604 | * interrupts for this device and makes the stack poll the driver | |
1605 | */ | |
1606 | static irqreturn_t | |
7d12e780 | 1607 | spider_net_interrupt(int irq, void *ptr) |
aaec0fab JO |
1608 | { |
1609 | struct net_device *netdev = ptr; | |
1610 | struct spider_net_card *card = netdev_priv(netdev); | |
9a11fcb5 | 1611 | u32 status_reg, error_reg1, error_reg2; |
aaec0fab JO |
1612 | |
1613 | status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); | |
9a11fcb5 IK |
1614 | error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); |
1615 | error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); | |
aaec0fab | 1616 | |
9a11fcb5 IK |
1617 | if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) && |
1618 | !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) && | |
1619 | !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE)) | |
aaec0fab JO |
1620 | return IRQ_NONE; |
1621 | ||
aaec0fab JO |
1622 | if (status_reg & SPIDER_NET_RXINT ) { |
1623 | spider_net_rx_irq_off(card); | |
288379f0 | 1624 | napi_schedule(&card->napi); |
4c4bd5a9 | 1625 | card->num_rx_ints ++; |
aaec0fab | 1626 | } |
68a8c609 | 1627 | if (status_reg & SPIDER_NET_TXINT) |
288379f0 | 1628 | napi_schedule(&card->napi); |
aaec0fab | 1629 | |
abdb66b5 KI |
1630 | if (status_reg & SPIDER_NET_LINKINT) |
1631 | spider_net_link_reset(netdev); | |
1632 | ||
11f1a52b | 1633 | if (status_reg & SPIDER_NET_ERRINT ) |
9a11fcb5 IK |
1634 | spider_net_handle_error_irq(card, status_reg, |
1635 | error_reg1, error_reg2); | |
aaec0fab JO |
1636 | |
1637 | /* clear interrupt sources */ | |
1638 | spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); | |
1639 | ||
1640 | return IRQ_HANDLED; | |
1641 | } | |
1642 | ||
1643 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1644 | /** | |
1645 | * spider_net_poll_controller - artificial interrupt for netconsole etc. | |
1646 | * @netdev: interface device structure | |
1647 | * | |
1648 | * see Documentation/networking/netconsole.txt | |
1649 | */ | |
1650 | static void | |
1651 | spider_net_poll_controller(struct net_device *netdev) | |
1652 | { | |
1653 | disable_irq(netdev->irq); | |
7d12e780 | 1654 | spider_net_interrupt(netdev->irq, netdev); |
aaec0fab JO |
1655 | enable_irq(netdev->irq); |
1656 | } | |
1657 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1658 | ||
7a627558 IK |
1659 | /** |
1660 | * spider_net_enable_interrupts - enable interrupts | |
1661 | * @card: card structure | |
1662 | * | |
1663 | * spider_net_enable_interrupt enables several interrupts | |
1664 | */ | |
7d2e3cb7 | 1665 | static void |
7a627558 IK |
1666 | spider_net_enable_interrupts(struct spider_net_card *card) |
1667 | { | |
1668 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, | |
1669 | SPIDER_NET_INT0_MASK_VALUE); | |
1670 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, | |
1671 | SPIDER_NET_INT1_MASK_VALUE); | |
1672 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, | |
1673 | SPIDER_NET_INT2_MASK_VALUE); | |
1674 | } | |
1675 | ||
1676 | /** | |
1677 | * spider_net_disable_interrupts - disable interrupts | |
1678 | * @card: card structure | |
1679 | * | |
1680 | * spider_net_disable_interrupts disables all the interrupts | |
1681 | */ | |
7d2e3cb7 | 1682 | static void |
7a627558 IK |
1683 | spider_net_disable_interrupts(struct spider_net_card *card) |
1684 | { | |
1685 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); | |
1686 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); | |
1687 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); | |
1688 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); | |
1689 | } | |
1690 | ||
aaec0fab JO |
1691 | /** |
1692 | * spider_net_init_card - initializes the card | |
1693 | * @card: card structure | |
1694 | * | |
1695 | * spider_net_init_card initializes the card so that other registers can | |
1696 | * be used | |
1697 | */ | |
1698 | static void | |
1699 | spider_net_init_card(struct spider_net_card *card) | |
1700 | { | |
1701 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1702 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
1703 | ||
1704 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
1705 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
3342cf0e KI |
1706 | |
1707 | /* trigger ETOMOD signal */ | |
1708 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, | |
1709 | spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); | |
1710 | ||
7a627558 | 1711 | spider_net_disable_interrupts(card); |
aaec0fab JO |
1712 | } |
1713 | ||
1714 | /** | |
1715 | * spider_net_enable_card - enables the card by setting all kinds of regs | |
1716 | * @card: card structure | |
1717 | * | |
1718 | * spider_net_enable_card sets a lot of SMMIO registers to enable the device | |
1719 | */ | |
1720 | static void | |
1721 | spider_net_enable_card(struct spider_net_card *card) | |
1722 | { | |
1723 | int i; | |
1724 | /* the following array consists of (register),(value) pairs | |
1725 | * that are set in this function. A register of 0 ends the list */ | |
1726 | u32 regs[][2] = { | |
1727 | { SPIDER_NET_GRESUMINTNUM, 0 }, | |
1728 | { SPIDER_NET_GREINTNUM, 0 }, | |
1729 | ||
1730 | /* set interrupt frame number registers */ | |
1731 | /* clear the single DMA engine registers first */ | |
1732 | { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1733 | { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1734 | { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1735 | { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, | |
1736 | /* then set, what we really need */ | |
1737 | { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, | |
1738 | ||
1739 | /* timer counter registers and stuff */ | |
1740 | { SPIDER_NET_GFREECNNUM, 0 }, | |
1741 | { SPIDER_NET_GONETIMENUM, 0 }, | |
1742 | { SPIDER_NET_GTOUTFRMNUM, 0 }, | |
1743 | ||
1744 | /* RX mode setting */ | |
1745 | { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, | |
1746 | /* TX mode setting */ | |
1747 | { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, | |
1748 | /* IPSEC mode setting */ | |
1749 | { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, | |
1750 | ||
1751 | { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, | |
1752 | ||
1753 | { SPIDER_NET_GMRWOLCTRL, 0 }, | |
b636d17a JO |
1754 | { SPIDER_NET_GTESTMD, 0x10000000 }, |
1755 | { SPIDER_NET_GTTQMSK, 0x00400040 }, | |
aaec0fab JO |
1756 | |
1757 | { SPIDER_NET_GMACINTEN, 0 }, | |
1758 | ||
1759 | /* flow control stuff */ | |
1760 | { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, | |
1761 | { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, | |
1762 | ||
1763 | { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, | |
1764 | { 0, 0} | |
1765 | }; | |
1766 | ||
1767 | i = 0; | |
1768 | while (regs[i][0]) { | |
1769 | spider_net_write_reg(card, regs[i][0], regs[i][1]); | |
1770 | i++; | |
1771 | } | |
1772 | ||
1773 | /* clear unicast filter table entries 1 to 14 */ | |
1774 | for (i = 1; i <= 14; i++) { | |
1775 | spider_net_write_reg(card, | |
1776 | SPIDER_NET_GMRUAFILnR + i * 8, | |
1777 | 0x00080000); | |
1778 | spider_net_write_reg(card, | |
1779 | SPIDER_NET_GMRUAFILnR + i * 8 + 4, | |
1780 | 0x00000000); | |
1781 | } | |
1782 | ||
1783 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); | |
1784 | ||
1785 | spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); | |
1786 | ||
3ad2f3fb | 1787 | /* set chain tail address for RX chains and |
aaec0fab JO |
1788 | * enable DMA */ |
1789 | spider_net_enable_rxchtails(card); | |
1790 | spider_net_enable_rxdmac(card); | |
1791 | ||
1792 | spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); | |
1793 | ||
aaec0fab JO |
1794 | spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, |
1795 | SPIDER_NET_LENLMT_VALUE); | |
aaec0fab JO |
1796 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, |
1797 | SPIDER_NET_OPMODE_VALUE); | |
1798 | ||
bdd01503 | 1799 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
7bd54c86 | 1800 | SPIDER_NET_GDTBSTA); |
aaec0fab JO |
1801 | } |
1802 | ||
3cf761dd KI |
1803 | /** |
1804 | * spider_net_download_firmware - loads firmware into the adapter | |
1805 | * @card: card structure | |
1806 | * @firmware_ptr: pointer to firmware data | |
1807 | * | |
1808 | * spider_net_download_firmware loads the firmware data into the | |
1809 | * adapter. It assumes the length etc. to be allright. | |
1810 | */ | |
1811 | static int | |
1812 | spider_net_download_firmware(struct spider_net_card *card, | |
1813 | const void *firmware_ptr) | |
1814 | { | |
1815 | int sequencer, i; | |
1816 | const u32 *fw_ptr = firmware_ptr; | |
1817 | ||
1818 | /* stop sequencers */ | |
1819 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1820 | SPIDER_NET_STOP_SEQ_VALUE); | |
1821 | ||
1822 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; | |
1823 | sequencer++) { | |
1824 | spider_net_write_reg(card, | |
1825 | SPIDER_NET_GSnPRGADR + sequencer * 8, 0); | |
1826 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { | |
1827 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + | |
1828 | sequencer * 8, *fw_ptr); | |
1829 | fw_ptr++; | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) | |
1834 | return -EIO; | |
1835 | ||
1836 | spider_net_write_reg(card, SPIDER_NET_GSINIT, | |
1837 | SPIDER_NET_RUN_SEQ_VALUE); | |
1838 | ||
1839 | return 0; | |
1840 | } | |
1841 | ||
1842 | /** | |
1843 | * spider_net_init_firmware - reads in firmware parts | |
1844 | * @card: card structure | |
1845 | * | |
1846 | * Returns 0 on success, <0 on failure | |
1847 | * | |
1848 | * spider_net_init_firmware opens the sequencer firmware and does some basic | |
1849 | * checks. This function opens and releases the firmware structure. A call | |
1850 | * to download the firmware is performed before the release. | |
1851 | * | |
1852 | * Firmware format | |
1853 | * =============== | |
1854 | * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being | |
1855 | * the program for each sequencer. Use the command | |
1856 | * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ | |
1857 | * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ | |
1858 | * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin | |
1859 | * | |
1860 | * to generate spider_fw.bin, if you have sequencer programs with something | |
1861 | * like the following contents for each sequencer: | |
1862 | * <ONE LINE COMMENT> | |
1863 | * <FIRST 4-BYTES-WORD FOR SEQUENCER> | |
1864 | * <SECOND 4-BYTES-WORD FOR SEQUENCER> | |
1865 | * ... | |
1866 | * <1024th 4-BYTES-WORD FOR SEQUENCER> | |
1867 | */ | |
1868 | static int | |
1869 | spider_net_init_firmware(struct spider_net_card *card) | |
1870 | { | |
1871 | struct firmware *firmware = NULL; | |
1872 | struct device_node *dn; | |
1873 | const u8 *fw_prop = NULL; | |
1874 | int err = -ENOENT; | |
1875 | int fw_size; | |
1876 | ||
1877 | if (request_firmware((const struct firmware **)&firmware, | |
1878 | SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { | |
1879 | if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && | |
1880 | netif_msg_probe(card) ) { | |
e6311d85 LV |
1881 | dev_err(&card->netdev->dev, |
1882 | "Incorrect size of spidernet firmware in " \ | |
3cf761dd KI |
1883 | "filesystem. Looking in host firmware...\n"); |
1884 | goto try_host_fw; | |
1885 | } | |
1886 | err = spider_net_download_firmware(card, firmware->data); | |
1887 | ||
1888 | release_firmware(firmware); | |
1889 | if (err) | |
1890 | goto try_host_fw; | |
1891 | ||
1892 | goto done; | |
1893 | } | |
1894 | ||
1895 | try_host_fw: | |
1896 | dn = pci_device_to_OF_node(card->pdev); | |
1897 | if (!dn) | |
1898 | goto out_err; | |
1899 | ||
40cd3a45 | 1900 | fw_prop = of_get_property(dn, "firmware", &fw_size); |
3cf761dd KI |
1901 | if (!fw_prop) |
1902 | goto out_err; | |
1903 | ||
1904 | if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && | |
1905 | netif_msg_probe(card) ) { | |
e6311d85 LV |
1906 | dev_err(&card->netdev->dev, |
1907 | "Incorrect size of spidernet firmware in host firmware\n"); | |
3cf761dd KI |
1908 | goto done; |
1909 | } | |
1910 | ||
1911 | err = spider_net_download_firmware(card, fw_prop); | |
1912 | ||
1913 | done: | |
1914 | return err; | |
1915 | out_err: | |
1916 | if (netif_msg_probe(card)) | |
e6311d85 LV |
1917 | dev_err(&card->netdev->dev, |
1918 | "Couldn't find spidernet firmware in filesystem " \ | |
3cf761dd KI |
1919 | "or host firmware\n"); |
1920 | return err; | |
1921 | } | |
1922 | ||
aaec0fab JO |
1923 | /** |
1924 | * spider_net_open - called upon ifonfig up | |
1925 | * @netdev: interface device structure | |
1926 | * | |
1927 | * returns 0 on success, <0 on failure | |
1928 | * | |
1929 | * spider_net_open allocates all the descriptors and memory needed for | |
1930 | * operation, sets up multicast list and enables interrupts | |
1931 | */ | |
1932 | int | |
1933 | spider_net_open(struct net_device *netdev) | |
1934 | { | |
1935 | struct spider_net_card *card = netdev_priv(netdev); | |
d4ed8f8d | 1936 | int result; |
aaec0fab | 1937 | |
3cf761dd KI |
1938 | result = spider_net_init_firmware(card); |
1939 | if (result) | |
1940 | goto init_firmware_failed; | |
1941 | ||
abdb66b5 | 1942 | /* start probing with copper */ |
81971bef IK |
1943 | card->aneg_count = 0; |
1944 | card->medium = BCM54XX_COPPER; | |
abdb66b5 KI |
1945 | spider_net_setup_aneg(card); |
1946 | if (card->phy.def->phy_id) | |
1947 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
1948 | ||
d4ed8f8d LV |
1949 | result = spider_net_init_chain(card, &card->tx_chain); |
1950 | if (result) | |
aaec0fab | 1951 | goto alloc_tx_failed; |
204e5fa1 LV |
1952 | card->low_watermark = NULL; |
1953 | ||
d4ed8f8d LV |
1954 | result = spider_net_init_chain(card, &card->rx_chain); |
1955 | if (result) | |
aaec0fab JO |
1956 | goto alloc_rx_failed; |
1957 | ||
d4ed8f8d | 1958 | /* Allocate rx skbs */ |
228fb087 WY |
1959 | result = spider_net_alloc_rx_skbs(card); |
1960 | if (result) | |
aaec0fab JO |
1961 | goto alloc_skbs_failed; |
1962 | ||
1963 | spider_net_set_multi(netdev); | |
1964 | ||
1965 | /* further enhancement: setup hw vlan, if needed */ | |
1966 | ||
1967 | result = -EBUSY; | |
1968 | if (request_irq(netdev->irq, spider_net_interrupt, | |
1fb9df5d | 1969 | IRQF_SHARED, netdev->name, netdev)) |
aaec0fab JO |
1970 | goto register_int_failed; |
1971 | ||
1972 | spider_net_enable_card(card); | |
1973 | ||
543cec51 JO |
1974 | netif_start_queue(netdev); |
1975 | netif_carrier_on(netdev); | |
bea3348e | 1976 | napi_enable(&card->napi); |
543cec51 | 1977 | |
7a627558 IK |
1978 | spider_net_enable_interrupts(card); |
1979 | ||
aaec0fab JO |
1980 | return 0; |
1981 | ||
1982 | register_int_failed: | |
1983 | spider_net_free_rx_chain_contents(card); | |
1984 | alloc_skbs_failed: | |
1985 | spider_net_free_chain(card, &card->rx_chain); | |
1986 | alloc_rx_failed: | |
1987 | spider_net_free_chain(card, &card->tx_chain); | |
1988 | alloc_tx_failed: | |
abdb66b5 | 1989 | del_timer_sync(&card->aneg_timer); |
3cf761dd | 1990 | init_firmware_failed: |
aaec0fab JO |
1991 | return result; |
1992 | } | |
1993 | ||
abdb66b5 KI |
1994 | /** |
1995 | * spider_net_link_phy | |
1996 | * @data: used for pointer to card structure | |
1997 | * | |
1998 | */ | |
1999 | static void spider_net_link_phy(unsigned long data) | |
2000 | { | |
2001 | struct spider_net_card *card = (struct spider_net_card *)data; | |
2002 | struct mii_phy *phy = &card->phy; | |
2003 | ||
2004 | /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ | |
2005 | if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { | |
2006 | ||
0b50d753 IK |
2007 | pr_debug("%s: link is down trying to bring it up\n", |
2008 | card->netdev->name); | |
abdb66b5 | 2009 | |
4b23a554 JO |
2010 | switch (card->medium) { |
2011 | case BCM54XX_COPPER: | |
abdb66b5 KI |
2012 | /* enable fiber with autonegotiation first */ |
2013 | if (phy->def->ops->enable_fiber) | |
2014 | phy->def->ops->enable_fiber(phy, 1); | |
4b23a554 | 2015 | card->medium = BCM54XX_FIBER; |
abdb66b5 KI |
2016 | break; |
2017 | ||
4b23a554 | 2018 | case BCM54XX_FIBER: |
abdb66b5 KI |
2019 | /* fiber didn't come up, try to disable fiber autoneg */ |
2020 | if (phy->def->ops->enable_fiber) | |
2021 | phy->def->ops->enable_fiber(phy, 0); | |
4b23a554 | 2022 | card->medium = BCM54XX_UNKNOWN; |
abdb66b5 KI |
2023 | break; |
2024 | ||
4b23a554 | 2025 | case BCM54XX_UNKNOWN: |
abdb66b5 KI |
2026 | /* copper, fiber with and without failed, |
2027 | * retry from beginning */ | |
2028 | spider_net_setup_aneg(card); | |
4b23a554 | 2029 | card->medium = BCM54XX_COPPER; |
abdb66b5 KI |
2030 | break; |
2031 | } | |
2032 | ||
2033 | card->aneg_count = 0; | |
2034 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
2035 | return; | |
2036 | } | |
2037 | ||
2038 | /* link still not up, try again later */ | |
2039 | if (!(phy->def->ops->poll_link(phy))) { | |
2040 | card->aneg_count++; | |
2041 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); | |
2042 | return; | |
2043 | } | |
2044 | ||
2045 | /* link came up, get abilities */ | |
2046 | phy->def->ops->read_link(phy); | |
2047 | ||
2048 | spider_net_write_reg(card, SPIDER_NET_GMACST, | |
2049 | spider_net_read_reg(card, SPIDER_NET_GMACST)); | |
2050 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); | |
2051 | ||
2052 | if (phy->speed == 1000) | |
2053 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); | |
2054 | else | |
2055 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); | |
2056 | ||
2057 | card->aneg_count = 0; | |
2058 | ||
0b50d753 IK |
2059 | pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n", |
2060 | card->netdev->name, phy->speed, | |
2061 | phy->duplex == 1 ? "Full" : "Half", | |
2062 | phy->autoneg == 1 ? "" : "no "); | |
abdb66b5 KI |
2063 | } |
2064 | ||
aaec0fab JO |
2065 | /** |
2066 | * spider_net_setup_phy - setup PHY | |
2067 | * @card: card structure | |
2068 | * | |
2069 | * returns 0 on success, <0 on failure | |
2070 | * | |
abdb66b5 | 2071 | * spider_net_setup_phy is used as part of spider_net_probe. |
aaec0fab JO |
2072 | **/ |
2073 | static int | |
2074 | spider_net_setup_phy(struct spider_net_card *card) | |
2075 | { | |
2076 | struct mii_phy *phy = &card->phy; | |
2077 | ||
2078 | spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, | |
2079 | SPIDER_NET_DMASEL_VALUE); | |
2080 | spider_net_write_reg(card, SPIDER_NET_GPCCTRL, | |
2081 | SPIDER_NET_PHY_CTRL_VALUE); | |
abdb66b5 | 2082 | |
aaec0fab JO |
2083 | phy->dev = card->netdev; |
2084 | phy->mdio_read = spider_net_read_phy; | |
2085 | phy->mdio_write = spider_net_write_phy; | |
2086 | ||
abdb66b5 KI |
2087 | for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { |
2088 | unsigned short id; | |
2089 | id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); | |
2090 | if (id != 0x0000 && id != 0xffff) { | |
19e2f6fe | 2091 | if (!sungem_phy_probe(phy, phy->mii_id)) { |
abdb66b5 KI |
2092 | pr_info("Found %s.\n", phy->def->name); |
2093 | break; | |
2094 | } | |
2095 | } | |
2096 | } | |
aaec0fab JO |
2097 | |
2098 | return 0; | |
2099 | } | |
2100 | ||
aaec0fab JO |
2101 | /** |
2102 | * spider_net_workaround_rxramfull - work around firmware bug | |
2103 | * @card: card structure | |
2104 | * | |
2105 | * no return value | |
2106 | **/ | |
2107 | static void | |
2108 | spider_net_workaround_rxramfull(struct spider_net_card *card) | |
2109 | { | |
2110 | int i, sequencer = 0; | |
2111 | ||
2112 | /* cancel reset */ | |
2113 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2114 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2115 | ||
2116 | /* empty sequencer data */ | |
11f1a52b AB |
2117 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
2118 | sequencer++) { | |
ee962a5c | 2119 | spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + |
aaec0fab | 2120 | sequencer * 8, 0x0); |
11f1a52b | 2121 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
aaec0fab JO |
2122 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
2123 | sequencer * 8, 0x0); | |
2124 | } | |
2125 | } | |
2126 | ||
2127 | /* set sequencer operation */ | |
2128 | spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); | |
2129 | ||
2130 | /* reset */ | |
2131 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2132 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2133 | } | |
2134 | ||
bdd01503 JO |
2135 | /** |
2136 | * spider_net_stop - called upon ifconfig down | |
2137 | * @netdev: interface device structure | |
2138 | * | |
2139 | * always returns 0 | |
2140 | */ | |
2141 | int | |
2142 | spider_net_stop(struct net_device *netdev) | |
2143 | { | |
2144 | struct spider_net_card *card = netdev_priv(netdev); | |
2145 | ||
bea3348e | 2146 | napi_disable(&card->napi); |
bdd01503 JO |
2147 | netif_carrier_off(netdev); |
2148 | netif_stop_queue(netdev); | |
2149 | del_timer_sync(&card->tx_timer); | |
abdb66b5 | 2150 | del_timer_sync(&card->aneg_timer); |
bdd01503 | 2151 | |
7a627558 | 2152 | spider_net_disable_interrupts(card); |
bdd01503 | 2153 | |
d406eafe | 2154 | free_irq(netdev->irq, netdev); |
bdd01503 JO |
2155 | |
2156 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, | |
2157 | SPIDER_NET_DMA_TX_FEND_VALUE); | |
2158 | ||
2159 | /* turn off DMA, force end */ | |
2160 | spider_net_disable_rxdmac(card); | |
2161 | ||
2162 | /* release chains */ | |
9cc7bf7e | 2163 | spider_net_release_tx_chain(card, 1); |
d4ed8f8d | 2164 | spider_net_free_rx_chain_contents(card); |
bdd01503 JO |
2165 | |
2166 | spider_net_free_chain(card, &card->tx_chain); | |
2167 | spider_net_free_chain(card, &card->rx_chain); | |
2168 | ||
2169 | return 0; | |
2170 | } | |
2171 | ||
aaec0fab JO |
2172 | /** |
2173 | * spider_net_tx_timeout_task - task scheduled by the watchdog timeout | |
2174 | * function (to be called not under interrupt status) | |
2175 | * @data: data, is interface device structure | |
2176 | * | |
2177 | * called as task when tx hangs, resets interface (if interface is up) | |
2178 | */ | |
2179 | static void | |
c4028958 | 2180 | spider_net_tx_timeout_task(struct work_struct *work) |
aaec0fab | 2181 | { |
c4028958 DH |
2182 | struct spider_net_card *card = |
2183 | container_of(work, struct spider_net_card, tx_timeout_task); | |
2184 | struct net_device *netdev = card->netdev; | |
aaec0fab JO |
2185 | |
2186 | if (!(netdev->flags & IFF_UP)) | |
2187 | goto out; | |
2188 | ||
2189 | netif_device_detach(netdev); | |
2190 | spider_net_stop(netdev); | |
2191 | ||
2192 | spider_net_workaround_rxramfull(card); | |
2193 | spider_net_init_card(card); | |
2194 | ||
2195 | if (spider_net_setup_phy(card)) | |
2196 | goto out; | |
aaec0fab JO |
2197 | |
2198 | spider_net_open(netdev); | |
bdd01503 | 2199 | spider_net_kick_tx_dma(card); |
aaec0fab JO |
2200 | netif_device_attach(netdev); |
2201 | ||
2202 | out: | |
2203 | atomic_dec(&card->tx_timeout_task_counter); | |
2204 | } | |
2205 | ||
2206 | /** | |
2207 | * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. | |
2208 | * @netdev: interface device structure | |
2209 | * | |
2210 | * called, if tx hangs. Schedules a task that resets the interface | |
2211 | */ | |
2212 | static void | |
2213 | spider_net_tx_timeout(struct net_device *netdev) | |
2214 | { | |
2215 | struct spider_net_card *card; | |
2216 | ||
2217 | card = netdev_priv(netdev); | |
2218 | atomic_inc(&card->tx_timeout_task_counter); | |
2219 | if (netdev->flags & IFF_UP) | |
2220 | schedule_work(&card->tx_timeout_task); | |
2221 | else | |
2222 | atomic_dec(&card->tx_timeout_task_counter); | |
9b6b0b81 | 2223 | card->spider_stats.tx_timeouts++; |
aaec0fab JO |
2224 | } |
2225 | ||
6e06cb62 | 2226 | static const struct net_device_ops spider_net_ops = { |
da4a99e3 DM |
2227 | .ndo_open = spider_net_open, |
2228 | .ndo_stop = spider_net_stop, | |
2229 | .ndo_start_xmit = spider_net_xmit, | |
afc4b13d | 2230 | .ndo_set_rx_mode = spider_net_set_multi, |
da4a99e3 DM |
2231 | .ndo_set_mac_address = spider_net_set_mac, |
2232 | .ndo_change_mtu = spider_net_change_mtu, | |
2233 | .ndo_do_ioctl = spider_net_do_ioctl, | |
2234 | .ndo_tx_timeout = spider_net_tx_timeout, | |
3e303dc1 | 2235 | .ndo_validate_addr = eth_validate_addr, |
6e06cb62 YH |
2236 | /* HW VLAN */ |
2237 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2238 | /* poll controller */ | |
da4a99e3 | 2239 | .ndo_poll_controller = spider_net_poll_controller, |
6e06cb62 YH |
2240 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
2241 | }; | |
2242 | ||
aaec0fab JO |
2243 | /** |
2244 | * spider_net_setup_netdev_ops - initialization of net_device operations | |
2245 | * @netdev: net_device structure | |
2246 | * | |
2247 | * fills out function pointers in the net_device structure | |
2248 | */ | |
2249 | static void | |
2250 | spider_net_setup_netdev_ops(struct net_device *netdev) | |
2251 | { | |
6e06cb62 | 2252 | netdev->netdev_ops = &spider_net_ops; |
aaec0fab | 2253 | netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; |
aaec0fab JO |
2254 | /* ethtool ops */ |
2255 | netdev->ethtool_ops = &spider_net_ethtool_ops; | |
2256 | } | |
2257 | ||
2258 | /** | |
2259 | * spider_net_setup_netdev - initialization of net_device | |
2260 | * @card: card structure | |
2261 | * | |
2262 | * Returns 0 on success or <0 on failure | |
2263 | * | |
2264 | * spider_net_setup_netdev initializes the net_device structure | |
2265 | **/ | |
2266 | static int | |
2267 | spider_net_setup_netdev(struct spider_net_card *card) | |
2268 | { | |
2269 | int result; | |
2270 | struct net_device *netdev = card->netdev; | |
2271 | struct device_node *dn; | |
2272 | struct sockaddr addr; | |
1a2509c9 | 2273 | const u8 *mac; |
aaec0fab | 2274 | |
aaec0fab JO |
2275 | SET_NETDEV_DEV(netdev, &card->pdev->dev); |
2276 | ||
2277 | pci_set_drvdata(card->pdev, netdev); | |
11f1a52b | 2278 | |
11f1a52b AB |
2279 | init_timer(&card->tx_timer); |
2280 | card->tx_timer.function = | |
2281 | (void (*)(unsigned long)) spider_net_cleanup_tx_ring; | |
2282 | card->tx_timer.data = (unsigned long) card; | |
aaec0fab JO |
2283 | netdev->irq = card->pdev->irq; |
2284 | ||
abdb66b5 KI |
2285 | card->aneg_count = 0; |
2286 | init_timer(&card->aneg_timer); | |
2287 | card->aneg_timer.function = spider_net_link_phy; | |
2288 | card->aneg_timer.data = (unsigned long) card; | |
2289 | ||
bea3348e SH |
2290 | netif_napi_add(netdev, &card->napi, |
2291 | spider_net_poll, SPIDER_NET_NAPI_WEIGHT); | |
2292 | ||
aaec0fab JO |
2293 | spider_net_setup_netdev_ops(netdev); |
2294 | ||
6de240b7 MM |
2295 | netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM; |
2296 | if (SPIDER_NET_RX_CSUM_DEFAULT) | |
2297 | netdev->features |= NETIF_F_RXCSUM; | |
2298 | netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX; | |
f646968f PM |
2299 | /* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | |
2300 | * NETIF_F_HW_VLAN_CTAG_FILTER */ | |
aaec0fab JO |
2301 | |
2302 | netdev->irq = card->pdev->irq; | |
4c4bd5a9 | 2303 | card->num_rx_ints = 0; |
c3d1182a | 2304 | card->ignore_rx_ramfull = 0; |
aaec0fab JO |
2305 | |
2306 | dn = pci_device_to_OF_node(card->pdev); | |
543cec51 JO |
2307 | if (!dn) |
2308 | return -EIO; | |
2309 | ||
40cd3a45 | 2310 | mac = of_get_property(dn, "local-mac-address", NULL); |
543cec51 JO |
2311 | if (!mac) |
2312 | return -EIO; | |
aaec0fab JO |
2313 | memcpy(addr.sa_data, mac, ETH_ALEN); |
2314 | ||
2315 | result = spider_net_set_mac(netdev, &addr); | |
2316 | if ((result) && (netif_msg_probe(card))) | |
e6311d85 LV |
2317 | dev_err(&card->netdev->dev, |
2318 | "Failed to set MAC address: %i\n", result); | |
aaec0fab JO |
2319 | |
2320 | result = register_netdev(netdev); | |
2321 | if (result) { | |
2322 | if (netif_msg_probe(card)) | |
e6311d85 LV |
2323 | dev_err(&card->netdev->dev, |
2324 | "Couldn't register net_device: %i\n", result); | |
aaec0fab JO |
2325 | return result; |
2326 | } | |
2327 | ||
2328 | if (netif_msg_probe(card)) | |
2329 | pr_info("Initialized device %s.\n", netdev->name); | |
2330 | ||
2331 | return 0; | |
2332 | } | |
2333 | ||
2334 | /** | |
2335 | * spider_net_alloc_card - allocates net_device and card structure | |
2336 | * | |
2337 | * returns the card structure or NULL in case of errors | |
2338 | * | |
2339 | * the card and net_device structures are linked to each other | |
2340 | */ | |
2341 | static struct spider_net_card * | |
2342 | spider_net_alloc_card(void) | |
2343 | { | |
2344 | struct net_device *netdev; | |
2345 | struct spider_net_card *card; | |
4cb6f9e5 | 2346 | size_t alloc_size; |
aaec0fab | 2347 | |
4cb6f9e5 LV |
2348 | alloc_size = sizeof(struct spider_net_card) + |
2349 | (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr); | |
2350 | netdev = alloc_etherdev(alloc_size); | |
aaec0fab JO |
2351 | if (!netdev) |
2352 | return NULL; | |
2353 | ||
2354 | card = netdev_priv(netdev); | |
2355 | card->netdev = netdev; | |
2356 | card->msg_enable = SPIDER_NET_DEFAULT_MSG; | |
c4028958 | 2357 | INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); |
aaec0fab JO |
2358 | init_waitqueue_head(&card->waitq); |
2359 | atomic_set(&card->tx_timeout_task_counter, 0); | |
2360 | ||
4cb6f9e5 LV |
2361 | card->rx_chain.num_desc = rx_descriptors; |
2362 | card->rx_chain.ring = card->darray; | |
2363 | card->tx_chain.num_desc = tx_descriptors; | |
2364 | card->tx_chain.ring = card->darray + rx_descriptors; | |
2365 | ||
aaec0fab JO |
2366 | return card; |
2367 | } | |
2368 | ||
2369 | /** | |
2370 | * spider_net_undo_pci_setup - releases PCI ressources | |
2371 | * @card: card structure | |
2372 | * | |
2373 | * spider_net_undo_pci_setup releases the mapped regions | |
2374 | */ | |
2375 | static void | |
2376 | spider_net_undo_pci_setup(struct spider_net_card *card) | |
2377 | { | |
2378 | iounmap(card->regs); | |
2379 | pci_release_regions(card->pdev); | |
2380 | } | |
2381 | ||
2382 | /** | |
2383 | * spider_net_setup_pci_dev - sets up the device in terms of PCI operations | |
aaec0fab JO |
2384 | * @pdev: PCI device |
2385 | * | |
2386 | * Returns the card structure or NULL if any errors occur | |
2387 | * | |
2388 | * spider_net_setup_pci_dev initializes pdev and together with the | |
2389 | * functions called in spider_net_open configures the device so that | |
2390 | * data can be transferred over it | |
2391 | * The net_device structure is attached to the card structure, if the | |
2392 | * function returns without error. | |
2393 | **/ | |
2394 | static struct spider_net_card * | |
2395 | spider_net_setup_pci_dev(struct pci_dev *pdev) | |
2396 | { | |
2397 | struct spider_net_card *card; | |
2398 | unsigned long mmio_start, mmio_len; | |
2399 | ||
2400 | if (pci_enable_device(pdev)) { | |
e6311d85 | 2401 | dev_err(&pdev->dev, "Couldn't enable PCI device\n"); |
aaec0fab JO |
2402 | return NULL; |
2403 | } | |
2404 | ||
2405 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
e6311d85 LV |
2406 | dev_err(&pdev->dev, |
2407 | "Couldn't find proper PCI device base address.\n"); | |
aaec0fab JO |
2408 | goto out_disable_dev; |
2409 | } | |
2410 | ||
2411 | if (pci_request_regions(pdev, spider_net_driver_name)) { | |
e6311d85 LV |
2412 | dev_err(&pdev->dev, |
2413 | "Couldn't obtain PCI resources, aborting.\n"); | |
aaec0fab JO |
2414 | goto out_disable_dev; |
2415 | } | |
2416 | ||
2417 | pci_set_master(pdev); | |
2418 | ||
2419 | card = spider_net_alloc_card(); | |
2420 | if (!card) { | |
e6311d85 LV |
2421 | dev_err(&pdev->dev, |
2422 | "Couldn't allocate net_device structure, aborting.\n"); | |
aaec0fab JO |
2423 | goto out_release_regions; |
2424 | } | |
2425 | card->pdev = pdev; | |
2426 | ||
2427 | /* fetch base address and length of first resource */ | |
2428 | mmio_start = pci_resource_start(pdev, 0); | |
2429 | mmio_len = pci_resource_len(pdev, 0); | |
2430 | ||
2431 | card->netdev->mem_start = mmio_start; | |
2432 | card->netdev->mem_end = mmio_start + mmio_len; | |
2433 | card->regs = ioremap(mmio_start, mmio_len); | |
2434 | ||
2435 | if (!card->regs) { | |
e6311d85 LV |
2436 | dev_err(&pdev->dev, |
2437 | "Couldn't obtain PCI resources, aborting.\n"); | |
aaec0fab JO |
2438 | goto out_release_regions; |
2439 | } | |
2440 | ||
2441 | return card; | |
2442 | ||
2443 | out_release_regions: | |
2444 | pci_release_regions(pdev); | |
2445 | out_disable_dev: | |
2446 | pci_disable_device(pdev); | |
aaec0fab JO |
2447 | return NULL; |
2448 | } | |
2449 | ||
2450 | /** | |
2451 | * spider_net_probe - initialization of a device | |
2452 | * @pdev: PCI device | |
2453 | * @ent: entry in the device id list | |
2454 | * | |
2455 | * Returns 0 on success, <0 on failure | |
2456 | * | |
2457 | * spider_net_probe initializes pdev and registers a net_device | |
2458 | * structure for it. After that, the device can be ifconfig'ed up | |
2459 | **/ | |
671a1435 | 2460 | static int |
aaec0fab JO |
2461 | spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
2462 | { | |
2463 | int err = -EIO; | |
2464 | struct spider_net_card *card; | |
2465 | ||
2466 | card = spider_net_setup_pci_dev(pdev); | |
2467 | if (!card) | |
2468 | goto out; | |
2469 | ||
2470 | spider_net_workaround_rxramfull(card); | |
2471 | spider_net_init_card(card); | |
2472 | ||
2473 | err = spider_net_setup_phy(card); | |
2474 | if (err) | |
2475 | goto out_undo_pci; | |
2476 | ||
aaec0fab JO |
2477 | err = spider_net_setup_netdev(card); |
2478 | if (err) | |
2479 | goto out_undo_pci; | |
2480 | ||
2481 | return 0; | |
2482 | ||
2483 | out_undo_pci: | |
2484 | spider_net_undo_pci_setup(card); | |
2485 | free_netdev(card->netdev); | |
2486 | out: | |
2487 | return err; | |
2488 | } | |
2489 | ||
2490 | /** | |
2491 | * spider_net_remove - removal of a device | |
2492 | * @pdev: PCI device | |
2493 | * | |
2494 | * Returns 0 on success, <0 on failure | |
2495 | * | |
2496 | * spider_net_remove is called to remove the device and unregisters the | |
2497 | * net_device | |
2498 | **/ | |
671a1435 | 2499 | static void |
aaec0fab JO |
2500 | spider_net_remove(struct pci_dev *pdev) |
2501 | { | |
2502 | struct net_device *netdev; | |
2503 | struct spider_net_card *card; | |
2504 | ||
2505 | netdev = pci_get_drvdata(pdev); | |
2506 | card = netdev_priv(netdev); | |
2507 | ||
2508 | wait_event(card->waitq, | |
2509 | atomic_read(&card->tx_timeout_task_counter) == 0); | |
2510 | ||
2511 | unregister_netdev(netdev); | |
543cec51 JO |
2512 | |
2513 | /* switch off card */ | |
2514 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2515 | SPIDER_NET_CKRCTRL_STOP_VALUE); | |
2516 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, | |
2517 | SPIDER_NET_CKRCTRL_RUN_VALUE); | |
2518 | ||
aaec0fab JO |
2519 | spider_net_undo_pci_setup(card); |
2520 | free_netdev(netdev); | |
aaec0fab JO |
2521 | } |
2522 | ||
2523 | static struct pci_driver spider_net_driver = { | |
aaec0fab JO |
2524 | .name = spider_net_driver_name, |
2525 | .id_table = spider_net_pci_tbl, | |
2526 | .probe = spider_net_probe, | |
671a1435 | 2527 | .remove = spider_net_remove |
aaec0fab JO |
2528 | }; |
2529 | ||
2530 | /** | |
2531 | * spider_net_init - init function when the driver is loaded | |
2532 | * | |
2533 | * spider_net_init registers the device driver | |
2534 | */ | |
2535 | static int __init spider_net_init(void) | |
2536 | { | |
90f10841 LV |
2537 | printk(KERN_INFO "Spidernet version %s.\n", VERSION); |
2538 | ||
aaec0fab JO |
2539 | if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { |
2540 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; | |
2541 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2542 | } | |
2543 | if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { | |
2544 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; | |
2545 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); | |
2546 | } | |
2547 | if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { | |
2548 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; | |
2549 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2550 | } | |
2551 | if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { | |
2552 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; | |
2553 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); | |
2554 | } | |
2555 | ||
2556 | return pci_register_driver(&spider_net_driver); | |
2557 | } | |
2558 | ||
2559 | /** | |
2560 | * spider_net_cleanup - exit function when driver is unloaded | |
2561 | * | |
2562 | * spider_net_cleanup unregisters the device driver | |
2563 | */ | |
2564 | static void __exit spider_net_cleanup(void) | |
2565 | { | |
2566 | pci_unregister_driver(&spider_net_driver); | |
2567 | } | |
2568 | ||
2569 | module_init(spider_net_init); | |
2570 | module_exit(spider_net_cleanup); |