]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * acenic.c: Linux driver for the Alteon AceNIC Gigabit Ethernet card | |
3 | * and other Tigon based cards. | |
4 | * | |
5 | * Copyright 1998-2002 by Jes Sorensen, <jes@trained-monkey.org>. | |
6 | * | |
7 | * Thanks to Alteon and 3Com for providing hardware and documentation | |
8 | * enabling me to write this driver. | |
9 | * | |
10 | * A mailing list for discussing the use of this driver has been | |
11 | * setup, please subscribe to the lists if you have any questions | |
12 | * about the driver. Send mail to linux-acenic-help@sunsite.auc.dk to | |
13 | * see how to subscribe. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License as published by | |
17 | * the Free Software Foundation; either version 2 of the License, or | |
18 | * (at your option) any later version. | |
19 | * | |
20 | * Additional credits: | |
21 | * Pete Wyckoff <wyckoff@ca.sandia.gov>: Initial Linux/Alpha and trace | |
22 | * dump support. The trace dump support has not been | |
23 | * integrated yet however. | |
24 | * Troy Benjegerdes: Big Endian (PPC) patches. | |
25 | * Nate Stahl: Better out of memory handling and stats support. | |
26 | * Aman Singla: Nasty race between interrupt handler and tx code dealing | |
27 | * with 'testing the tx_ret_csm and setting tx_full' | |
28 | * David S. Miller <davem@redhat.com>: conversion to new PCI dma mapping | |
29 | * infrastructure and Sparc support | |
30 | * Pierrick Pinasseau (CERN): For lending me an Ultra 5 to test the | |
31 | * driver under Linux/Sparc64 | |
32 | * Matt Domsch <Matt_Domsch@dell.com>: Detect Alteon 1000baseT cards | |
33 | * ETHTOOL_GDRVINFO support | |
34 | * Chip Salzenberg <chip@valinux.com>: Fix race condition between tx | |
35 | * handler and close() cleanup. | |
36 | * Ken Aaker <kdaaker@rchland.vnet.ibm.com>: Correct check for whether | |
37 | * memory mapped IO is enabled to | |
38 | * make the driver work on RS/6000. | |
39 | * Takayoshi Kouchi <kouchi@hpc.bs1.fc.nec.co.jp>: Identifying problem | |
40 | * where the driver would disable | |
41 | * bus master mode if it had to disable | |
42 | * write and invalidate. | |
43 | * Stephen Hack <stephen_hack@hp.com>: Fixed ace_set_mac_addr for little | |
44 | * endian systems. | |
45 | * Val Henson <vhenson@esscom.com>: Reset Jumbo skb producer and | |
46 | * rx producer index when | |
47 | * flushing the Jumbo ring. | |
48 | * Hans Grobler <grobh@sun.ac.za>: Memory leak fixes in the | |
49 | * driver init path. | |
50 | * Grant Grundler <grundler@cup.hp.com>: PCI write posting fixes. | |
51 | */ | |
52 | ||
1da177e4 LT |
53 | #include <linux/module.h> |
54 | #include <linux/moduleparam.h> | |
1da177e4 LT |
55 | #include <linux/types.h> |
56 | #include <linux/errno.h> | |
57 | #include <linux/ioport.h> | |
58 | #include <linux/pci.h> | |
1e7f0bd8 | 59 | #include <linux/dma-mapping.h> |
1da177e4 LT |
60 | #include <linux/kernel.h> |
61 | #include <linux/netdevice.h> | |
62 | #include <linux/etherdevice.h> | |
63 | #include <linux/skbuff.h> | |
1da177e4 LT |
64 | #include <linux/delay.h> |
65 | #include <linux/mm.h> | |
66 | #include <linux/highmem.h> | |
67 | #include <linux/sockios.h> | |
949b4254 | 68 | #include <linux/firmware.h> |
5a0e3ad6 | 69 | #include <linux/slab.h> |
268bb0ce | 70 | #include <linux/prefetch.h> |
1da177e4 | 71 | #include <linux/if_vlan.h> |
1da177e4 LT |
72 | |
73 | #ifdef SIOCETHTOOL | |
74 | #include <linux/ethtool.h> | |
75 | #endif | |
76 | ||
77 | #include <net/sock.h> | |
78 | #include <net/ip.h> | |
79 | ||
1da177e4 LT |
80 | #include <asm/io.h> |
81 | #include <asm/irq.h> | |
82 | #include <asm/byteorder.h> | |
83 | #include <asm/uaccess.h> | |
84 | ||
85 | ||
86 | #define DRV_NAME "acenic" | |
87 | ||
88 | #undef INDEX_DEBUG | |
89 | ||
90 | #ifdef CONFIG_ACENIC_OMIT_TIGON_I | |
91 | #define ACE_IS_TIGON_I(ap) 0 | |
92 | #define ACE_TX_RING_ENTRIES(ap) MAX_TX_RING_ENTRIES | |
93 | #else | |
94 | #define ACE_IS_TIGON_I(ap) (ap->version == 1) | |
95 | #define ACE_TX_RING_ENTRIES(ap) ap->tx_ring_entries | |
96 | #endif | |
97 | ||
98 | #ifndef PCI_VENDOR_ID_ALTEON | |
6aa20a22 | 99 | #define PCI_VENDOR_ID_ALTEON 0x12ae |
1da177e4 LT |
100 | #endif |
101 | #ifndef PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE | |
102 | #define PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE 0x0001 | |
103 | #define PCI_DEVICE_ID_ALTEON_ACENIC_COPPER 0x0002 | |
104 | #endif | |
105 | #ifndef PCI_DEVICE_ID_3COM_3C985 | |
106 | #define PCI_DEVICE_ID_3COM_3C985 0x0001 | |
107 | #endif | |
108 | #ifndef PCI_VENDOR_ID_NETGEAR | |
109 | #define PCI_VENDOR_ID_NETGEAR 0x1385 | |
110 | #define PCI_DEVICE_ID_NETGEAR_GA620 0x620a | |
111 | #endif | |
112 | #ifndef PCI_DEVICE_ID_NETGEAR_GA620T | |
113 | #define PCI_DEVICE_ID_NETGEAR_GA620T 0x630a | |
114 | #endif | |
115 | ||
116 | ||
117 | /* | |
118 | * Farallon used the DEC vendor ID by mistake and they seem not | |
119 | * to care - stinky! | |
120 | */ | |
121 | #ifndef PCI_DEVICE_ID_FARALLON_PN9000SX | |
122 | #define PCI_DEVICE_ID_FARALLON_PN9000SX 0x1a | |
123 | #endif | |
124 | #ifndef PCI_DEVICE_ID_FARALLON_PN9100T | |
125 | #define PCI_DEVICE_ID_FARALLON_PN9100T 0xfa | |
126 | #endif | |
127 | #ifndef PCI_VENDOR_ID_SGI | |
128 | #define PCI_VENDOR_ID_SGI 0x10a9 | |
129 | #endif | |
130 | #ifndef PCI_DEVICE_ID_SGI_ACENIC | |
131 | #define PCI_DEVICE_ID_SGI_ACENIC 0x0009 | |
132 | #endif | |
133 | ||
9baa3c34 | 134 | static const struct pci_device_id acenic_pci_tbl[] = { |
1da177e4 LT |
135 | { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE, |
136 | PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, | |
137 | { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_COPPER, | |
138 | PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, | |
139 | { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3C985, | |
140 | PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, | |
141 | { PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620, | |
142 | PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, | |
143 | { PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620T, | |
144 | PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, | |
145 | /* | |
146 | * Farallon used the DEC vendor ID on their cards incorrectly, | |
147 | * then later Alteon's ID. | |
148 | */ | |
149 | { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_FARALLON_PN9000SX, | |
150 | PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, | |
151 | { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_FARALLON_PN9100T, | |
152 | PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, | |
153 | { PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_ACENIC, | |
154 | PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, | |
155 | { } | |
156 | }; | |
157 | MODULE_DEVICE_TABLE(pci, acenic_pci_tbl); | |
158 | ||
1da177e4 | 159 | #define ace_sync_irq(irq) synchronize_irq(irq) |
1da177e4 LT |
160 | |
161 | #ifndef offset_in_page | |
162 | #define offset_in_page(ptr) ((unsigned long)(ptr) & ~PAGE_MASK) | |
163 | #endif | |
164 | ||
165 | #define ACE_MAX_MOD_PARMS 8 | |
166 | #define BOARD_IDX_STATIC 0 | |
167 | #define BOARD_IDX_OVERFLOW -1 | |
168 | ||
1da177e4 LT |
169 | #include "acenic.h" |
170 | ||
171 | /* | |
172 | * These must be defined before the firmware is included. | |
173 | */ | |
174 | #define MAX_TEXT_LEN 96*1024 | |
175 | #define MAX_RODATA_LEN 8*1024 | |
176 | #define MAX_DATA_LEN 2*1024 | |
177 | ||
1da177e4 LT |
178 | #ifndef tigon2FwReleaseLocal |
179 | #define tigon2FwReleaseLocal 0 | |
180 | #endif | |
181 | ||
182 | /* | |
183 | * This driver currently supports Tigon I and Tigon II based cards | |
184 | * including the Alteon AceNIC, the 3Com 3C985[B] and NetGear | |
185 | * GA620. The driver should also work on the SGI, DEC and Farallon | |
186 | * versions of the card, however I have not been able to test that | |
187 | * myself. | |
188 | * | |
189 | * This card is really neat, it supports receive hardware checksumming | |
190 | * and jumbo frames (up to 9000 bytes) and does a lot of work in the | |
191 | * firmware. Also the programming interface is quite neat, except for | |
192 | * the parts dealing with the i2c eeprom on the card ;-) | |
193 | * | |
194 | * Using jumbo frames: | |
195 | * | |
196 | * To enable jumbo frames, simply specify an mtu between 1500 and 9000 | |
197 | * bytes to ifconfig. Jumbo frames can be enabled or disabled at any time | |
198 | * by running `ifconfig eth<X> mtu <MTU>' with <X> being the Ethernet | |
199 | * interface number and <MTU> being the MTU value. | |
200 | * | |
201 | * Module parameters: | |
202 | * | |
203 | * When compiled as a loadable module, the driver allows for a number | |
204 | * of module parameters to be specified. The driver supports the | |
205 | * following module parameters: | |
206 | * | |
207 | * trace=<val> - Firmware trace level. This requires special traced | |
208 | * firmware to replace the firmware supplied with | |
209 | * the driver - for debugging purposes only. | |
210 | * | |
211 | * link=<val> - Link state. Normally you want to use the default link | |
212 | * parameters set by the driver. This can be used to | |
213 | * override these in case your switch doesn't negotiate | |
214 | * the link properly. Valid values are: | |
215 | * 0x0001 - Force half duplex link. | |
216 | * 0x0002 - Do not negotiate line speed with the other end. | |
217 | * 0x0010 - 10Mbit/sec link. | |
218 | * 0x0020 - 100Mbit/sec link. | |
219 | * 0x0040 - 1000Mbit/sec link. | |
220 | * 0x0100 - Do not negotiate flow control. | |
221 | * 0x0200 - Enable RX flow control Y | |
222 | * 0x0400 - Enable TX flow control Y (Tigon II NICs only). | |
223 | * Default value is 0x0270, ie. enable link+flow | |
224 | * control negotiation. Negotiating the highest | |
225 | * possible link speed with RX flow control enabled. | |
226 | * | |
227 | * When disabling link speed negotiation, only one link | |
228 | * speed is allowed to be specified! | |
229 | * | |
230 | * tx_coal_tick=<val> - number of coalescing clock ticks (us) allowed | |
231 | * to wait for more packets to arive before | |
232 | * interrupting the host, from the time the first | |
233 | * packet arrives. | |
234 | * | |
235 | * rx_coal_tick=<val> - number of coalescing clock ticks (us) allowed | |
236 | * to wait for more packets to arive in the transmit ring, | |
237 | * before interrupting the host, after transmitting the | |
238 | * first packet in the ring. | |
239 | * | |
240 | * max_tx_desc=<val> - maximum number of transmit descriptors | |
241 | * (packets) transmitted before interrupting the host. | |
242 | * | |
243 | * max_rx_desc=<val> - maximum number of receive descriptors | |
244 | * (packets) received before interrupting the host. | |
245 | * | |
246 | * tx_ratio=<val> - 7 bit value (0 - 63) specifying the split in 64th | |
247 | * increments of the NIC's on board memory to be used for | |
248 | * transmit and receive buffers. For the 1MB NIC app. 800KB | |
249 | * is available, on the 1/2MB NIC app. 300KB is available. | |
250 | * 68KB will always be available as a minimum for both | |
251 | * directions. The default value is a 50/50 split. | |
252 | * dis_pci_mem_inval=<val> - disable PCI memory write and invalidate | |
253 | * operations, default (1) is to always disable this as | |
254 | * that is what Alteon does on NT. I have not been able | |
255 | * to measure any real performance differences with | |
256 | * this on my systems. Set <val>=0 if you want to | |
257 | * enable these operations. | |
258 | * | |
259 | * If you use more than one NIC, specify the parameters for the | |
260 | * individual NICs with a comma, ie. trace=0,0x00001fff,0 you want to | |
261 | * run tracing on NIC #2 but not on NIC #1 and #3. | |
262 | * | |
263 | * TODO: | |
264 | * | |
265 | * - Proper multicast support. | |
266 | * - NIC dump support. | |
267 | * - More tuning parameters. | |
268 | * | |
269 | * The mini ring is not used under Linux and I am not sure it makes sense | |
270 | * to actually use it. | |
271 | * | |
272 | * New interrupt handler strategy: | |
273 | * | |
274 | * The old interrupt handler worked using the traditional method of | |
275 | * replacing an skbuff with a new one when a packet arrives. However | |
276 | * the rx rings do not need to contain a static number of buffer | |
277 | * descriptors, thus it makes sense to move the memory allocation out | |
278 | * of the main interrupt handler and do it in a bottom half handler | |
279 | * and only allocate new buffers when the number of buffers in the | |
280 | * ring is below a certain threshold. In order to avoid starving the | |
281 | * NIC under heavy load it is however necessary to force allocation | |
282 | * when hitting a minimum threshold. The strategy for alloction is as | |
283 | * follows: | |
284 | * | |
285 | * RX_LOW_BUF_THRES - allocate buffers in the bottom half | |
286 | * RX_PANIC_LOW_THRES - we are very low on buffers, allocate | |
287 | * the buffers in the interrupt handler | |
288 | * RX_RING_THRES - maximum number of buffers in the rx ring | |
289 | * RX_MINI_THRES - maximum number of buffers in the mini ring | |
290 | * RX_JUMBO_THRES - maximum number of buffers in the jumbo ring | |
291 | * | |
292 | * One advantagous side effect of this allocation approach is that the | |
293 | * entire rx processing can be done without holding any spin lock | |
294 | * since the rx rings and registers are totally independent of the tx | |
295 | * ring and its registers. This of course includes the kmalloc's of | |
296 | * new skb's. Thus start_xmit can run in parallel with rx processing | |
297 | * and the memory allocation on SMP systems. | |
298 | * | |
299 | * Note that running the skb reallocation in a bottom half opens up | |
300 | * another can of races which needs to be handled properly. In | |
301 | * particular it can happen that the interrupt handler tries to run | |
302 | * the reallocation while the bottom half is either running on another | |
303 | * CPU or was interrupted on the same CPU. To get around this the | |
304 | * driver uses bitops to prevent the reallocation routines from being | |
305 | * reentered. | |
306 | * | |
307 | * TX handling can also be done without holding any spin lock, wheee | |
308 | * this is fun! since tx_ret_csm is only written to by the interrupt | |
309 | * handler. The case to be aware of is when shutting down the device | |
310 | * and cleaning up where it is necessary to make sure that | |
311 | * start_xmit() is not running while this is happening. Well DaveM | |
312 | * informs me that this case is already protected against ... bye bye | |
313 | * Mr. Spin Lock, it was nice to know you. | |
314 | * | |
315 | * TX interrupts are now partly disabled so the NIC will only generate | |
316 | * TX interrupts for the number of coal ticks, not for the number of | |
317 | * TX packets in the queue. This should reduce the number of TX only, | |
318 | * ie. when no RX processing is done, interrupts seen. | |
319 | */ | |
320 | ||
321 | /* | |
322 | * Threshold values for RX buffer allocation - the low water marks for | |
323 | * when to start refilling the rings are set to 75% of the ring | |
324 | * sizes. It seems to make sense to refill the rings entirely from the | |
325 | * intrrupt handler once it gets below the panic threshold, that way | |
326 | * we don't risk that the refilling is moved to another CPU when the | |
327 | * one running the interrupt handler just got the slab code hot in its | |
328 | * cache. | |
329 | */ | |
330 | #define RX_RING_SIZE 72 | |
331 | #define RX_MINI_SIZE 64 | |
332 | #define RX_JUMBO_SIZE 48 | |
333 | ||
334 | #define RX_PANIC_STD_THRES 16 | |
335 | #define RX_PANIC_STD_REFILL (3*RX_PANIC_STD_THRES)/2 | |
336 | #define RX_LOW_STD_THRES (3*RX_RING_SIZE)/4 | |
337 | #define RX_PANIC_MINI_THRES 12 | |
338 | #define RX_PANIC_MINI_REFILL (3*RX_PANIC_MINI_THRES)/2 | |
339 | #define RX_LOW_MINI_THRES (3*RX_MINI_SIZE)/4 | |
340 | #define RX_PANIC_JUMBO_THRES 6 | |
341 | #define RX_PANIC_JUMBO_REFILL (3*RX_PANIC_JUMBO_THRES)/2 | |
342 | #define RX_LOW_JUMBO_THRES (3*RX_JUMBO_SIZE)/4 | |
343 | ||
344 | ||
345 | /* | |
346 | * Size of the mini ring entries, basically these just should be big | |
347 | * enough to take TCP ACKs | |
348 | */ | |
349 | #define ACE_MINI_SIZE 100 | |
350 | ||
351 | #define ACE_MINI_BUFSIZE ACE_MINI_SIZE | |
352 | #define ACE_STD_BUFSIZE (ACE_STD_MTU + ETH_HLEN + 4) | |
353 | #define ACE_JUMBO_BUFSIZE (ACE_JUMBO_MTU + ETH_HLEN + 4) | |
354 | ||
355 | /* | |
356 | * There seems to be a magic difference in the effect between 995 and 996 | |
357 | * but little difference between 900 and 995 ... no idea why. | |
358 | * | |
359 | * There is now a default set of tuning parameters which is set, depending | |
360 | * on whether or not the user enables Jumbo frames. It's assumed that if | |
361 | * Jumbo frames are enabled, the user wants optimal tuning for that case. | |
362 | */ | |
363 | #define DEF_TX_COAL 400 /* 996 */ | |
364 | #define DEF_TX_MAX_DESC 60 /* was 40 */ | |
365 | #define DEF_RX_COAL 120 /* 1000 */ | |
366 | #define DEF_RX_MAX_DESC 25 | |
367 | #define DEF_TX_RATIO 21 /* 24 */ | |
368 | ||
369 | #define DEF_JUMBO_TX_COAL 20 | |
370 | #define DEF_JUMBO_TX_MAX_DESC 60 | |
371 | #define DEF_JUMBO_RX_COAL 30 | |
372 | #define DEF_JUMBO_RX_MAX_DESC 6 | |
373 | #define DEF_JUMBO_TX_RATIO 21 | |
374 | ||
375 | #if tigon2FwReleaseLocal < 20001118 | |
376 | /* | |
377 | * Standard firmware and early modifications duplicate | |
378 | * IRQ load without this flag (coal timer is never reset). | |
379 | * Note that with this flag tx_coal should be less than | |
380 | * time to xmit full tx ring. | |
381 | * 400usec is not so bad for tx ring size of 128. | |
382 | */ | |
383 | #define TX_COAL_INTS_ONLY 1 /* worth it */ | |
384 | #else | |
385 | /* | |
386 | * With modified firmware, this is not necessary, but still useful. | |
387 | */ | |
388 | #define TX_COAL_INTS_ONLY 1 | |
389 | #endif | |
390 | ||
391 | #define DEF_TRACE 0 | |
392 | #define DEF_STAT (2 * TICKS_PER_SEC) | |
393 | ||
394 | ||
ddfce6bb | 395 | static int link_state[ACE_MAX_MOD_PARMS]; |
1da177e4 LT |
396 | static int trace[ACE_MAX_MOD_PARMS]; |
397 | static int tx_coal_tick[ACE_MAX_MOD_PARMS]; | |
398 | static int rx_coal_tick[ACE_MAX_MOD_PARMS]; | |
399 | static int max_tx_desc[ACE_MAX_MOD_PARMS]; | |
400 | static int max_rx_desc[ACE_MAX_MOD_PARMS]; | |
401 | static int tx_ratio[ACE_MAX_MOD_PARMS]; | |
402 | static int dis_pci_mem_inval[ACE_MAX_MOD_PARMS] = {1, 1, 1, 1, 1, 1, 1, 1}; | |
403 | ||
404 | MODULE_AUTHOR("Jes Sorensen <jes@trained-monkey.org>"); | |
405 | MODULE_LICENSE("GPL"); | |
406 | MODULE_DESCRIPTION("AceNIC/3C985/GA620 Gigabit Ethernet driver"); | |
949b4254 JS |
407 | #ifndef CONFIG_ACENIC_OMIT_TIGON_I |
408 | MODULE_FIRMWARE("acenic/tg1.bin"); | |
409 | #endif | |
410 | MODULE_FIRMWARE("acenic/tg2.bin"); | |
1da177e4 | 411 | |
ddfce6bb | 412 | module_param_array_named(link, link_state, int, NULL, 0); |
1da177e4 LT |
413 | module_param_array(trace, int, NULL, 0); |
414 | module_param_array(tx_coal_tick, int, NULL, 0); | |
415 | module_param_array(max_tx_desc, int, NULL, 0); | |
416 | module_param_array(rx_coal_tick, int, NULL, 0); | |
417 | module_param_array(max_rx_desc, int, NULL, 0); | |
418 | module_param_array(tx_ratio, int, NULL, 0); | |
419 | MODULE_PARM_DESC(link, "AceNIC/3C985/NetGear link state"); | |
420 | MODULE_PARM_DESC(trace, "AceNIC/3C985/NetGear firmware trace level"); | |
421 | MODULE_PARM_DESC(tx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first tx descriptor arrives"); | |
422 | MODULE_PARM_DESC(max_tx_desc, "AceNIC/3C985/GA620 max number of transmit descriptors to wait"); | |
423 | MODULE_PARM_DESC(rx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first rx descriptor arrives"); | |
424 | MODULE_PARM_DESC(max_rx_desc, "AceNIC/3C985/GA620 max number of receive descriptors to wait"); | |
425 | MODULE_PARM_DESC(tx_ratio, "AceNIC/3C985/GA620 ratio of NIC memory used for TX/RX descriptors (range 0-63)"); | |
426 | ||
427 | ||
083abbb7 | 428 | static const char version[] = |
1da177e4 LT |
429 | "acenic.c: v0.92 08/05/2002 Jes Sorensen, linux-acenic@SunSITE.dk\n" |
430 | " http://home.cern.ch/~jes/gige/acenic.html\n"; | |
431 | ||
432 | static int ace_get_settings(struct net_device *, struct ethtool_cmd *); | |
433 | static int ace_set_settings(struct net_device *, struct ethtool_cmd *); | |
434 | static void ace_get_drvinfo(struct net_device *, struct ethtool_drvinfo *); | |
435 | ||
7282d491 | 436 | static const struct ethtool_ops ace_ethtool_ops = { |
1da177e4 LT |
437 | .get_settings = ace_get_settings, |
438 | .set_settings = ace_set_settings, | |
439 | .get_drvinfo = ace_get_drvinfo, | |
440 | }; | |
441 | ||
442 | static void ace_watchdog(struct net_device *dev); | |
443 | ||
d8b83c57 SH |
444 | static const struct net_device_ops ace_netdev_ops = { |
445 | .ndo_open = ace_open, | |
446 | .ndo_stop = ace_close, | |
447 | .ndo_tx_timeout = ace_watchdog, | |
448 | .ndo_get_stats = ace_get_stats, | |
00829823 | 449 | .ndo_start_xmit = ace_start_xmit, |
afc4b13d | 450 | .ndo_set_rx_mode = ace_set_multicast_list, |
52255bbe | 451 | .ndo_validate_addr = eth_validate_addr, |
d8b83c57 SH |
452 | .ndo_set_mac_address = ace_set_mac_addr, |
453 | .ndo_change_mtu = ace_change_mtu, | |
d8b83c57 SH |
454 | }; |
455 | ||
083abbb7 | 456 | static int acenic_probe_one(struct pci_dev *pdev, |
1dd06ae8 | 457 | const struct pci_device_id *id) |
1da177e4 LT |
458 | { |
459 | struct net_device *dev; | |
460 | struct ace_private *ap; | |
461 | static int boards_found; | |
462 | ||
463 | dev = alloc_etherdev(sizeof(struct ace_private)); | |
41de8d4c | 464 | if (dev == NULL) |
1da177e4 | 465 | return -ENOMEM; |
1da177e4 | 466 | |
1da177e4 LT |
467 | SET_NETDEV_DEV(dev, &pdev->dev); |
468 | ||
454d7c9b | 469 | ap = netdev_priv(dev); |
1da177e4 LT |
470 | ap->pdev = pdev; |
471 | ap->name = pci_name(pdev); | |
472 | ||
473 | dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM; | |
f646968f | 474 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; |
25805dcf | 475 | |
25805dcf | 476 | dev->watchdog_timeo = 5*HZ; |
1da177e4 | 477 | |
d8b83c57 | 478 | dev->netdev_ops = &ace_netdev_ops; |
7ad24ea4 | 479 | dev->ethtool_ops = &ace_ethtool_ops; |
1da177e4 LT |
480 | |
481 | /* we only display this string ONCE */ | |
482 | if (!boards_found) | |
483 | printk(version); | |
484 | ||
485 | if (pci_enable_device(pdev)) | |
486 | goto fail_free_netdev; | |
487 | ||
488 | /* | |
489 | * Enable master mode before we start playing with the | |
490 | * pci_command word since pci_set_master() will modify | |
491 | * it. | |
492 | */ | |
493 | pci_set_master(pdev); | |
494 | ||
495 | pci_read_config_word(pdev, PCI_COMMAND, &ap->pci_command); | |
496 | ||
6aa20a22 | 497 | /* OpenFirmware on Mac's does not set this - DOH.. */ |
1da177e4 LT |
498 | if (!(ap->pci_command & PCI_COMMAND_MEMORY)) { |
499 | printk(KERN_INFO "%s: Enabling PCI Memory Mapped " | |
500 | "access - was not enabled by BIOS/Firmware\n", | |
501 | ap->name); | |
502 | ap->pci_command = ap->pci_command | PCI_COMMAND_MEMORY; | |
503 | pci_write_config_word(ap->pdev, PCI_COMMAND, | |
504 | ap->pci_command); | |
505 | wmb(); | |
506 | } | |
507 | ||
508 | pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &ap->pci_latency); | |
509 | if (ap->pci_latency <= 0x40) { | |
510 | ap->pci_latency = 0x40; | |
511 | pci_write_config_byte(pdev, PCI_LATENCY_TIMER, ap->pci_latency); | |
512 | } | |
513 | ||
514 | /* | |
515 | * Remap the regs into kernel space - this is abuse of | |
516 | * dev->base_addr since it was means for I/O port | |
517 | * addresses but who gives a damn. | |
518 | */ | |
519 | dev->base_addr = pci_resource_start(pdev, 0); | |
520 | ap->regs = ioremap(dev->base_addr, 0x4000); | |
521 | if (!ap->regs) { | |
522 | printk(KERN_ERR "%s: Unable to map I/O register, " | |
523 | "AceNIC %i will be disabled.\n", | |
524 | ap->name, boards_found); | |
525 | goto fail_free_netdev; | |
526 | } | |
527 | ||
528 | switch(pdev->vendor) { | |
529 | case PCI_VENDOR_ID_ALTEON: | |
530 | if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9100T) { | |
531 | printk(KERN_INFO "%s: Farallon PN9100-T ", | |
532 | ap->name); | |
533 | } else { | |
534 | printk(KERN_INFO "%s: Alteon AceNIC ", | |
535 | ap->name); | |
536 | } | |
537 | break; | |
538 | case PCI_VENDOR_ID_3COM: | |
539 | printk(KERN_INFO "%s: 3Com 3C985 ", ap->name); | |
540 | break; | |
541 | case PCI_VENDOR_ID_NETGEAR: | |
542 | printk(KERN_INFO "%s: NetGear GA620 ", ap->name); | |
543 | break; | |
544 | case PCI_VENDOR_ID_DEC: | |
545 | if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9000SX) { | |
546 | printk(KERN_INFO "%s: Farallon PN9000-SX ", | |
547 | ap->name); | |
548 | break; | |
549 | } | |
550 | case PCI_VENDOR_ID_SGI: | |
551 | printk(KERN_INFO "%s: SGI AceNIC ", ap->name); | |
552 | break; | |
553 | default: | |
554 | printk(KERN_INFO "%s: Unknown AceNIC ", ap->name); | |
555 | break; | |
556 | } | |
557 | ||
558 | printk("Gigabit Ethernet at 0x%08lx, ", dev->base_addr); | |
c6387a48 | 559 | printk("irq %d\n", pdev->irq); |
1da177e4 LT |
560 | |
561 | #ifdef CONFIG_ACENIC_OMIT_TIGON_I | |
562 | if ((readl(&ap->regs->HostCtrl) >> 28) == 4) { | |
563 | printk(KERN_ERR "%s: Driver compiled without Tigon I" | |
564 | " support - NIC disabled\n", dev->name); | |
565 | goto fail_uninit; | |
566 | } | |
567 | #endif | |
568 | ||
569 | if (ace_allocate_descriptors(dev)) | |
570 | goto fail_free_netdev; | |
571 | ||
572 | #ifdef MODULE | |
573 | if (boards_found >= ACE_MAX_MOD_PARMS) | |
574 | ap->board_idx = BOARD_IDX_OVERFLOW; | |
575 | else | |
576 | ap->board_idx = boards_found; | |
577 | #else | |
578 | ap->board_idx = BOARD_IDX_STATIC; | |
579 | #endif | |
580 | ||
581 | if (ace_init(dev)) | |
582 | goto fail_free_netdev; | |
583 | ||
584 | if (register_netdev(dev)) { | |
585 | printk(KERN_ERR "acenic: device registration failed\n"); | |
586 | goto fail_uninit; | |
587 | } | |
588 | ap->name = dev->name; | |
589 | ||
590 | if (ap->pci_using_dac) | |
591 | dev->features |= NETIF_F_HIGHDMA; | |
592 | ||
593 | pci_set_drvdata(pdev, dev); | |
594 | ||
595 | boards_found++; | |
596 | return 0; | |
597 | ||
598 | fail_uninit: | |
599 | ace_init_cleanup(dev); | |
600 | fail_free_netdev: | |
601 | free_netdev(dev); | |
602 | return -ENODEV; | |
603 | } | |
604 | ||
083abbb7 | 605 | static void acenic_remove_one(struct pci_dev *pdev) |
1da177e4 LT |
606 | { |
607 | struct net_device *dev = pci_get_drvdata(pdev); | |
608 | struct ace_private *ap = netdev_priv(dev); | |
609 | struct ace_regs __iomem *regs = ap->regs; | |
610 | short i; | |
611 | ||
612 | unregister_netdev(dev); | |
613 | ||
614 | writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); | |
615 | if (ap->version >= 2) | |
616 | writel(readl(®s->CpuBCtrl) | CPU_HALT, ®s->CpuBCtrl); | |
6aa20a22 | 617 | |
1da177e4 LT |
618 | /* |
619 | * This clears any pending interrupts | |
620 | */ | |
621 | writel(1, ®s->Mb0Lo); | |
622 | readl(®s->CpuCtrl); /* flush */ | |
623 | ||
624 | /* | |
625 | * Make sure no other CPUs are processing interrupts | |
626 | * on the card before the buffers are being released. | |
627 | * Otherwise one might experience some `interesting' | |
628 | * effects. | |
629 | * | |
630 | * Then release the RX buffers - jumbo buffers were | |
631 | * already released in ace_close(). | |
632 | */ | |
633 | ace_sync_irq(dev->irq); | |
634 | ||
635 | for (i = 0; i < RX_STD_RING_ENTRIES; i++) { | |
636 | struct sk_buff *skb = ap->skb->rx_std_skbuff[i].skb; | |
637 | ||
638 | if (skb) { | |
639 | struct ring_info *ringp; | |
640 | dma_addr_t mapping; | |
641 | ||
642 | ringp = &ap->skb->rx_std_skbuff[i]; | |
430e55b1 | 643 | mapping = dma_unmap_addr(ringp, mapping); |
1da177e4 LT |
644 | pci_unmap_page(ap->pdev, mapping, |
645 | ACE_STD_BUFSIZE, | |
646 | PCI_DMA_FROMDEVICE); | |
647 | ||
648 | ap->rx_std_ring[i].size = 0; | |
649 | ap->skb->rx_std_skbuff[i].skb = NULL; | |
650 | dev_kfree_skb(skb); | |
651 | } | |
652 | } | |
653 | ||
654 | if (ap->version >= 2) { | |
655 | for (i = 0; i < RX_MINI_RING_ENTRIES; i++) { | |
656 | struct sk_buff *skb = ap->skb->rx_mini_skbuff[i].skb; | |
657 | ||
658 | if (skb) { | |
659 | struct ring_info *ringp; | |
660 | dma_addr_t mapping; | |
661 | ||
662 | ringp = &ap->skb->rx_mini_skbuff[i]; | |
430e55b1 | 663 | mapping = dma_unmap_addr(ringp,mapping); |
1da177e4 LT |
664 | pci_unmap_page(ap->pdev, mapping, |
665 | ACE_MINI_BUFSIZE, | |
666 | PCI_DMA_FROMDEVICE); | |
667 | ||
668 | ap->rx_mini_ring[i].size = 0; | |
669 | ap->skb->rx_mini_skbuff[i].skb = NULL; | |
670 | dev_kfree_skb(skb); | |
671 | } | |
672 | } | |
673 | } | |
674 | ||
675 | for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) { | |
676 | struct sk_buff *skb = ap->skb->rx_jumbo_skbuff[i].skb; | |
677 | if (skb) { | |
678 | struct ring_info *ringp; | |
679 | dma_addr_t mapping; | |
680 | ||
681 | ringp = &ap->skb->rx_jumbo_skbuff[i]; | |
430e55b1 | 682 | mapping = dma_unmap_addr(ringp, mapping); |
1da177e4 LT |
683 | pci_unmap_page(ap->pdev, mapping, |
684 | ACE_JUMBO_BUFSIZE, | |
685 | PCI_DMA_FROMDEVICE); | |
686 | ||
687 | ap->rx_jumbo_ring[i].size = 0; | |
688 | ap->skb->rx_jumbo_skbuff[i].skb = NULL; | |
689 | dev_kfree_skb(skb); | |
690 | } | |
691 | } | |
692 | ||
693 | ace_init_cleanup(dev); | |
694 | free_netdev(dev); | |
695 | } | |
696 | ||
697 | static struct pci_driver acenic_pci_driver = { | |
698 | .name = "acenic", | |
699 | .id_table = acenic_pci_tbl, | |
700 | .probe = acenic_probe_one, | |
083abbb7 | 701 | .remove = acenic_remove_one, |
1da177e4 LT |
702 | }; |
703 | ||
1da177e4 LT |
704 | static void ace_free_descriptors(struct net_device *dev) |
705 | { | |
706 | struct ace_private *ap = netdev_priv(dev); | |
707 | int size; | |
708 | ||
709 | if (ap->rx_std_ring != NULL) { | |
710 | size = (sizeof(struct rx_desc) * | |
711 | (RX_STD_RING_ENTRIES + | |
712 | RX_JUMBO_RING_ENTRIES + | |
713 | RX_MINI_RING_ENTRIES + | |
714 | RX_RETURN_RING_ENTRIES)); | |
715 | pci_free_consistent(ap->pdev, size, ap->rx_std_ring, | |
716 | ap->rx_ring_base_dma); | |
717 | ap->rx_std_ring = NULL; | |
718 | ap->rx_jumbo_ring = NULL; | |
719 | ap->rx_mini_ring = NULL; | |
720 | ap->rx_return_ring = NULL; | |
721 | } | |
722 | if (ap->evt_ring != NULL) { | |
723 | size = (sizeof(struct event) * EVT_RING_ENTRIES); | |
724 | pci_free_consistent(ap->pdev, size, ap->evt_ring, | |
725 | ap->evt_ring_dma); | |
726 | ap->evt_ring = NULL; | |
727 | } | |
728 | if (ap->tx_ring != NULL && !ACE_IS_TIGON_I(ap)) { | |
729 | size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES); | |
730 | pci_free_consistent(ap->pdev, size, ap->tx_ring, | |
731 | ap->tx_ring_dma); | |
732 | } | |
733 | ap->tx_ring = NULL; | |
734 | ||
735 | if (ap->evt_prd != NULL) { | |
736 | pci_free_consistent(ap->pdev, sizeof(u32), | |
737 | (void *)ap->evt_prd, ap->evt_prd_dma); | |
738 | ap->evt_prd = NULL; | |
739 | } | |
740 | if (ap->rx_ret_prd != NULL) { | |
741 | pci_free_consistent(ap->pdev, sizeof(u32), | |
742 | (void *)ap->rx_ret_prd, | |
743 | ap->rx_ret_prd_dma); | |
744 | ap->rx_ret_prd = NULL; | |
745 | } | |
746 | if (ap->tx_csm != NULL) { | |
747 | pci_free_consistent(ap->pdev, sizeof(u32), | |
748 | (void *)ap->tx_csm, ap->tx_csm_dma); | |
749 | ap->tx_csm = NULL; | |
750 | } | |
751 | } | |
752 | ||
753 | ||
754 | static int ace_allocate_descriptors(struct net_device *dev) | |
755 | { | |
756 | struct ace_private *ap = netdev_priv(dev); | |
757 | int size; | |
758 | ||
759 | size = (sizeof(struct rx_desc) * | |
760 | (RX_STD_RING_ENTRIES + | |
761 | RX_JUMBO_RING_ENTRIES + | |
762 | RX_MINI_RING_ENTRIES + | |
763 | RX_RETURN_RING_ENTRIES)); | |
764 | ||
765 | ap->rx_std_ring = pci_alloc_consistent(ap->pdev, size, | |
766 | &ap->rx_ring_base_dma); | |
767 | if (ap->rx_std_ring == NULL) | |
768 | goto fail; | |
769 | ||
770 | ap->rx_jumbo_ring = ap->rx_std_ring + RX_STD_RING_ENTRIES; | |
771 | ap->rx_mini_ring = ap->rx_jumbo_ring + RX_JUMBO_RING_ENTRIES; | |
772 | ap->rx_return_ring = ap->rx_mini_ring + RX_MINI_RING_ENTRIES; | |
773 | ||
774 | size = (sizeof(struct event) * EVT_RING_ENTRIES); | |
775 | ||
776 | ap->evt_ring = pci_alloc_consistent(ap->pdev, size, &ap->evt_ring_dma); | |
777 | ||
778 | if (ap->evt_ring == NULL) | |
779 | goto fail; | |
780 | ||
781 | /* | |
782 | * Only allocate a host TX ring for the Tigon II, the Tigon I | |
783 | * has to use PCI registers for this ;-( | |
784 | */ | |
785 | if (!ACE_IS_TIGON_I(ap)) { | |
786 | size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES); | |
787 | ||
788 | ap->tx_ring = pci_alloc_consistent(ap->pdev, size, | |
789 | &ap->tx_ring_dma); | |
790 | ||
791 | if (ap->tx_ring == NULL) | |
792 | goto fail; | |
793 | } | |
794 | ||
795 | ap->evt_prd = pci_alloc_consistent(ap->pdev, sizeof(u32), | |
796 | &ap->evt_prd_dma); | |
797 | if (ap->evt_prd == NULL) | |
798 | goto fail; | |
799 | ||
800 | ap->rx_ret_prd = pci_alloc_consistent(ap->pdev, sizeof(u32), | |
801 | &ap->rx_ret_prd_dma); | |
802 | if (ap->rx_ret_prd == NULL) | |
803 | goto fail; | |
804 | ||
805 | ap->tx_csm = pci_alloc_consistent(ap->pdev, sizeof(u32), | |
806 | &ap->tx_csm_dma); | |
807 | if (ap->tx_csm == NULL) | |
808 | goto fail; | |
809 | ||
810 | return 0; | |
811 | ||
812 | fail: | |
813 | /* Clean up. */ | |
814 | ace_init_cleanup(dev); | |
815 | return 1; | |
816 | } | |
817 | ||
818 | ||
819 | /* | |
820 | * Generic cleanup handling data allocated during init. Used when the | |
821 | * module is unloaded or if an error occurs during initialization | |
822 | */ | |
823 | static void ace_init_cleanup(struct net_device *dev) | |
824 | { | |
825 | struct ace_private *ap; | |
826 | ||
827 | ap = netdev_priv(dev); | |
828 | ||
829 | ace_free_descriptors(dev); | |
830 | ||
831 | if (ap->info) | |
832 | pci_free_consistent(ap->pdev, sizeof(struct ace_info), | |
833 | ap->info, ap->info_dma); | |
b4558ea9 JJ |
834 | kfree(ap->skb); |
835 | kfree(ap->trace_buf); | |
1da177e4 LT |
836 | |
837 | if (dev->irq) | |
838 | free_irq(dev->irq, dev); | |
839 | ||
840 | iounmap(ap->regs); | |
841 | } | |
842 | ||
843 | ||
844 | /* | |
845 | * Commands are considered to be slow. | |
846 | */ | |
847 | static inline void ace_issue_cmd(struct ace_regs __iomem *regs, struct cmd *cmd) | |
848 | { | |
849 | u32 idx; | |
850 | ||
851 | idx = readl(®s->CmdPrd); | |
852 | ||
853 | writel(*(u32 *)(cmd), ®s->CmdRng[idx]); | |
854 | idx = (idx + 1) % CMD_RING_ENTRIES; | |
855 | ||
856 | writel(idx, ®s->CmdPrd); | |
857 | } | |
858 | ||
859 | ||
083abbb7 | 860 | static int ace_init(struct net_device *dev) |
1da177e4 LT |
861 | { |
862 | struct ace_private *ap; | |
863 | struct ace_regs __iomem *regs; | |
864 | struct ace_info *info = NULL; | |
865 | struct pci_dev *pdev; | |
866 | unsigned long myjif; | |
867 | u64 tmp_ptr; | |
868 | u32 tig_ver, mac1, mac2, tmp, pci_state; | |
869 | int board_idx, ecode = 0; | |
870 | short i; | |
871 | unsigned char cache_size; | |
872 | ||
873 | ap = netdev_priv(dev); | |
874 | regs = ap->regs; | |
875 | ||
876 | board_idx = ap->board_idx; | |
877 | ||
878 | /* | |
879 | * aman@sgi.com - its useful to do a NIC reset here to | |
880 | * address the `Firmware not running' problem subsequent | |
881 | * to any crashes involving the NIC | |
882 | */ | |
883 | writel(HW_RESET | (HW_RESET << 24), ®s->HostCtrl); | |
884 | readl(®s->HostCtrl); /* PCI write posting */ | |
885 | udelay(5); | |
886 | ||
887 | /* | |
888 | * Don't access any other registers before this point! | |
889 | */ | |
890 | #ifdef __BIG_ENDIAN | |
891 | /* | |
892 | * This will most likely need BYTE_SWAP once we switch | |
893 | * to using __raw_writel() | |
894 | */ | |
895 | writel((WORD_SWAP | CLR_INT | ((WORD_SWAP | CLR_INT) << 24)), | |
896 | ®s->HostCtrl); | |
897 | #else | |
898 | writel((CLR_INT | WORD_SWAP | ((CLR_INT | WORD_SWAP) << 24)), | |
899 | ®s->HostCtrl); | |
900 | #endif | |
901 | readl(®s->HostCtrl); /* PCI write posting */ | |
902 | ||
903 | /* | |
904 | * Stop the NIC CPU and clear pending interrupts | |
905 | */ | |
906 | writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); | |
907 | readl(®s->CpuCtrl); /* PCI write posting */ | |
908 | writel(0, ®s->Mb0Lo); | |
909 | ||
910 | tig_ver = readl(®s->HostCtrl) >> 28; | |
911 | ||
912 | switch(tig_ver){ | |
913 | #ifndef CONFIG_ACENIC_OMIT_TIGON_I | |
914 | case 4: | |
915 | case 5: | |
916 | printk(KERN_INFO " Tigon I (Rev. %i), Firmware: %i.%i.%i, ", | |
949b4254 JS |
917 | tig_ver, ap->firmware_major, ap->firmware_minor, |
918 | ap->firmware_fix); | |
1da177e4 LT |
919 | writel(0, ®s->LocalCtrl); |
920 | ap->version = 1; | |
921 | ap->tx_ring_entries = TIGON_I_TX_RING_ENTRIES; | |
922 | break; | |
923 | #endif | |
924 | case 6: | |
925 | printk(KERN_INFO " Tigon II (Rev. %i), Firmware: %i.%i.%i, ", | |
949b4254 JS |
926 | tig_ver, ap->firmware_major, ap->firmware_minor, |
927 | ap->firmware_fix); | |
1da177e4 LT |
928 | writel(readl(®s->CpuBCtrl) | CPU_HALT, ®s->CpuBCtrl); |
929 | readl(®s->CpuBCtrl); /* PCI write posting */ | |
930 | /* | |
931 | * The SRAM bank size does _not_ indicate the amount | |
932 | * of memory on the card, it controls the _bank_ size! | |
933 | * Ie. a 1MB AceNIC will have two banks of 512KB. | |
934 | */ | |
935 | writel(SRAM_BANK_512K, ®s->LocalCtrl); | |
936 | writel(SYNC_SRAM_TIMING, ®s->MiscCfg); | |
937 | ap->version = 2; | |
938 | ap->tx_ring_entries = MAX_TX_RING_ENTRIES; | |
939 | break; | |
940 | default: | |
941 | printk(KERN_WARNING " Unsupported Tigon version detected " | |
942 | "(%i)\n", tig_ver); | |
943 | ecode = -ENODEV; | |
944 | goto init_error; | |
945 | } | |
946 | ||
947 | /* | |
948 | * ModeStat _must_ be set after the SRAM settings as this change | |
949 | * seems to corrupt the ModeStat and possible other registers. | |
950 | * The SRAM settings survive resets and setting it to the same | |
951 | * value a second time works as well. This is what caused the | |
952 | * `Firmware not running' problem on the Tigon II. | |
953 | */ | |
954 | #ifdef __BIG_ENDIAN | |
955 | writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL | ACE_BYTE_SWAP_BD | | |
956 | ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, ®s->ModeStat); | |
957 | #else | |
958 | writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL | | |
959 | ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, ®s->ModeStat); | |
960 | #endif | |
961 | readl(®s->ModeStat); /* PCI write posting */ | |
962 | ||
963 | mac1 = 0; | |
964 | for(i = 0; i < 4; i++) { | |
ddfce6bb | 965 | int t; |
6f9d4722 | 966 | |
1da177e4 | 967 | mac1 = mac1 << 8; |
ddfce6bb SH |
968 | t = read_eeprom_byte(dev, 0x8c+i); |
969 | if (t < 0) { | |
1da177e4 LT |
970 | ecode = -EIO; |
971 | goto init_error; | |
972 | } else | |
ddfce6bb | 973 | mac1 |= (t & 0xff); |
1da177e4 LT |
974 | } |
975 | mac2 = 0; | |
976 | for(i = 4; i < 8; i++) { | |
ddfce6bb | 977 | int t; |
6f9d4722 | 978 | |
1da177e4 | 979 | mac2 = mac2 << 8; |
ddfce6bb SH |
980 | t = read_eeprom_byte(dev, 0x8c+i); |
981 | if (t < 0) { | |
1da177e4 LT |
982 | ecode = -EIO; |
983 | goto init_error; | |
984 | } else | |
ddfce6bb | 985 | mac2 |= (t & 0xff); |
1da177e4 LT |
986 | } |
987 | ||
988 | writel(mac1, ®s->MacAddrHi); | |
989 | writel(mac2, ®s->MacAddrLo); | |
990 | ||
1da177e4 LT |
991 | dev->dev_addr[0] = (mac1 >> 8) & 0xff; |
992 | dev->dev_addr[1] = mac1 & 0xff; | |
993 | dev->dev_addr[2] = (mac2 >> 24) & 0xff; | |
994 | dev->dev_addr[3] = (mac2 >> 16) & 0xff; | |
995 | dev->dev_addr[4] = (mac2 >> 8) & 0xff; | |
996 | dev->dev_addr[5] = mac2 & 0xff; | |
997 | ||
e174961c | 998 | printk("MAC: %pM\n", dev->dev_addr); |
0795af57 | 999 | |
1da177e4 LT |
1000 | /* |
1001 | * Looks like this is necessary to deal with on all architectures, | |
1002 | * even this %$#%$# N440BX Intel based thing doesn't get it right. | |
1003 | * Ie. having two NICs in the machine, one will have the cache | |
1004 | * line set at boot time, the other will not. | |
1005 | */ | |
1006 | pdev = ap->pdev; | |
1007 | pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_size); | |
1008 | cache_size <<= 2; | |
1009 | if (cache_size != SMP_CACHE_BYTES) { | |
1010 | printk(KERN_INFO " PCI cache line size set incorrectly " | |
1011 | "(%i bytes) by BIOS/FW, ", cache_size); | |
1012 | if (cache_size > SMP_CACHE_BYTES) | |
1013 | printk("expecting %i\n", SMP_CACHE_BYTES); | |
1014 | else { | |
1015 | printk("correcting to %i\n", SMP_CACHE_BYTES); | |
1016 | pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, | |
1017 | SMP_CACHE_BYTES >> 2); | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | pci_state = readl(®s->PciState); | |
1022 | printk(KERN_INFO " PCI bus width: %i bits, speed: %iMHz, " | |
1023 | "latency: %i clks\n", | |
1024 | (pci_state & PCI_32BIT) ? 32 : 64, | |
6aa20a22 | 1025 | (pci_state & PCI_66MHZ) ? 66 : 33, |
1da177e4 LT |
1026 | ap->pci_latency); |
1027 | ||
1028 | /* | |
1029 | * Set the max DMA transfer size. Seems that for most systems | |
1030 | * the performance is better when no MAX parameter is | |
1031 | * set. However for systems enabling PCI write and invalidate, | |
1032 | * DMA writes must be set to the L1 cache line size to get | |
1033 | * optimal performance. | |
1034 | * | |
1035 | * The default is now to turn the PCI write and invalidate off | |
1036 | * - that is what Alteon does for NT. | |
1037 | */ | |
1038 | tmp = READ_CMD_MEM | WRITE_CMD_MEM; | |
1039 | if (ap->version >= 2) { | |
1040 | tmp |= (MEM_READ_MULTIPLE | (pci_state & PCI_66MHZ)); | |
1041 | /* | |
1042 | * Tuning parameters only supported for 8 cards | |
1043 | */ | |
1044 | if (board_idx == BOARD_IDX_OVERFLOW || | |
1045 | dis_pci_mem_inval[board_idx]) { | |
1046 | if (ap->pci_command & PCI_COMMAND_INVALIDATE) { | |
1047 | ap->pci_command &= ~PCI_COMMAND_INVALIDATE; | |
1048 | pci_write_config_word(pdev, PCI_COMMAND, | |
1049 | ap->pci_command); | |
1050 | printk(KERN_INFO " Disabling PCI memory " | |
1051 | "write and invalidate\n"); | |
1052 | } | |
1053 | } else if (ap->pci_command & PCI_COMMAND_INVALIDATE) { | |
1054 | printk(KERN_INFO " PCI memory write & invalidate " | |
1055 | "enabled by BIOS, enabling counter measures\n"); | |
1056 | ||
1057 | switch(SMP_CACHE_BYTES) { | |
1058 | case 16: | |
1059 | tmp |= DMA_WRITE_MAX_16; | |
1060 | break; | |
1061 | case 32: | |
1062 | tmp |= DMA_WRITE_MAX_32; | |
1063 | break; | |
1064 | case 64: | |
1065 | tmp |= DMA_WRITE_MAX_64; | |
1066 | break; | |
1067 | case 128: | |
1068 | tmp |= DMA_WRITE_MAX_128; | |
1069 | break; | |
1070 | default: | |
1071 | printk(KERN_INFO " Cache line size %i not " | |
1072 | "supported, PCI write and invalidate " | |
1073 | "disabled\n", SMP_CACHE_BYTES); | |
1074 | ap->pci_command &= ~PCI_COMMAND_INVALIDATE; | |
1075 | pci_write_config_word(pdev, PCI_COMMAND, | |
1076 | ap->pci_command); | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | #ifdef __sparc__ | |
1082 | /* | |
1083 | * On this platform, we know what the best dma settings | |
1084 | * are. We use 64-byte maximum bursts, because if we | |
1085 | * burst larger than the cache line size (or even cross | |
1086 | * a 64byte boundary in a single burst) the UltraSparc | |
1087 | * PCI controller will disconnect at 64-byte multiples. | |
1088 | * | |
1089 | * Read-multiple will be properly enabled above, and when | |
1090 | * set will give the PCI controller proper hints about | |
1091 | * prefetching. | |
1092 | */ | |
1093 | tmp &= ~DMA_READ_WRITE_MASK; | |
1094 | tmp |= DMA_READ_MAX_64; | |
1095 | tmp |= DMA_WRITE_MAX_64; | |
1096 | #endif | |
1097 | #ifdef __alpha__ | |
1098 | tmp &= ~DMA_READ_WRITE_MASK; | |
1099 | tmp |= DMA_READ_MAX_128; | |
1100 | /* | |
1101 | * All the docs say MUST NOT. Well, I did. | |
1102 | * Nothing terrible happens, if we load wrong size. | |
1103 | * Bit w&i still works better! | |
1104 | */ | |
1105 | tmp |= DMA_WRITE_MAX_128; | |
1106 | #endif | |
1107 | writel(tmp, ®s->PciState); | |
1108 | ||
1109 | #if 0 | |
1110 | /* | |
1111 | * The Host PCI bus controller driver has to set FBB. | |
1112 | * If all devices on that PCI bus support FBB, then the controller | |
1113 | * can enable FBB support in the Host PCI Bus controller (or on | |
1114 | * the PCI-PCI bridge if that applies). | |
1115 | * -ggg | |
1116 | */ | |
1117 | /* | |
1118 | * I have received reports from people having problems when this | |
1119 | * bit is enabled. | |
1120 | */ | |
1121 | if (!(ap->pci_command & PCI_COMMAND_FAST_BACK)) { | |
1122 | printk(KERN_INFO " Enabling PCI Fast Back to Back\n"); | |
1123 | ap->pci_command |= PCI_COMMAND_FAST_BACK; | |
1124 | pci_write_config_word(pdev, PCI_COMMAND, ap->pci_command); | |
1125 | } | |
1126 | #endif | |
6aa20a22 | 1127 | |
1da177e4 LT |
1128 | /* |
1129 | * Configure DMA attributes. | |
1130 | */ | |
6a35528a | 1131 | if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { |
1da177e4 | 1132 | ap->pci_using_dac = 1; |
284901a9 | 1133 | } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { |
1da177e4 LT |
1134 | ap->pci_using_dac = 0; |
1135 | } else { | |
1136 | ecode = -ENODEV; | |
1137 | goto init_error; | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * Initialize the generic info block and the command+event rings | |
1142 | * and the control blocks for the transmit and receive rings | |
1143 | * as they need to be setup once and for all. | |
1144 | */ | |
1145 | if (!(info = pci_alloc_consistent(ap->pdev, sizeof(struct ace_info), | |
1146 | &ap->info_dma))) { | |
1147 | ecode = -EAGAIN; | |
1148 | goto init_error; | |
1149 | } | |
1150 | ap->info = info; | |
1151 | ||
1152 | /* | |
1153 | * Get the memory for the skb rings. | |
1154 | */ | |
1155 | if (!(ap->skb = kmalloc(sizeof(struct ace_skb), GFP_KERNEL))) { | |
1156 | ecode = -EAGAIN; | |
1157 | goto init_error; | |
1158 | } | |
1159 | ||
1fb9df5d | 1160 | ecode = request_irq(pdev->irq, ace_interrupt, IRQF_SHARED, |
1da177e4 LT |
1161 | DRV_NAME, dev); |
1162 | if (ecode) { | |
1163 | printk(KERN_WARNING "%s: Requested IRQ %d is busy\n", | |
1164 | DRV_NAME, pdev->irq); | |
1165 | goto init_error; | |
1166 | } else | |
1167 | dev->irq = pdev->irq; | |
1168 | ||
1169 | #ifdef INDEX_DEBUG | |
1170 | spin_lock_init(&ap->debug_lock); | |
1171 | ap->last_tx = ACE_TX_RING_ENTRIES(ap) - 1; | |
1172 | ap->last_std_rx = 0; | |
1173 | ap->last_mini_rx = 0; | |
1174 | #endif | |
1175 | ||
1176 | memset(ap->info, 0, sizeof(struct ace_info)); | |
1177 | memset(ap->skb, 0, sizeof(struct ace_skb)); | |
1178 | ||
6c60e0c3 BH |
1179 | ecode = ace_load_firmware(dev); |
1180 | if (ecode) | |
949b4254 JS |
1181 | goto init_error; |
1182 | ||
1da177e4 LT |
1183 | ap->fw_running = 0; |
1184 | ||
1185 | tmp_ptr = ap->info_dma; | |
1186 | writel(tmp_ptr >> 32, ®s->InfoPtrHi); | |
1187 | writel(tmp_ptr & 0xffffffff, ®s->InfoPtrLo); | |
1188 | ||
1189 | memset(ap->evt_ring, 0, EVT_RING_ENTRIES * sizeof(struct event)); | |
1190 | ||
1191 | set_aceaddr(&info->evt_ctrl.rngptr, ap->evt_ring_dma); | |
1192 | info->evt_ctrl.flags = 0; | |
1193 | ||
1194 | *(ap->evt_prd) = 0; | |
1195 | wmb(); | |
1196 | set_aceaddr(&info->evt_prd_ptr, ap->evt_prd_dma); | |
1197 | writel(0, ®s->EvtCsm); | |
1198 | ||
1199 | set_aceaddr(&info->cmd_ctrl.rngptr, 0x100); | |
1200 | info->cmd_ctrl.flags = 0; | |
1201 | info->cmd_ctrl.max_len = 0; | |
1202 | ||
1203 | for (i = 0; i < CMD_RING_ENTRIES; i++) | |
1204 | writel(0, ®s->CmdRng[i]); | |
1205 | ||
1206 | writel(0, ®s->CmdPrd); | |
1207 | writel(0, ®s->CmdCsm); | |
1208 | ||
1209 | tmp_ptr = ap->info_dma; | |
1210 | tmp_ptr += (unsigned long) &(((struct ace_info *)0)->s.stats); | |
1211 | set_aceaddr(&info->stats2_ptr, (dma_addr_t) tmp_ptr); | |
1212 | ||
1213 | set_aceaddr(&info->rx_std_ctrl.rngptr, ap->rx_ring_base_dma); | |
1214 | info->rx_std_ctrl.max_len = ACE_STD_BUFSIZE; | |
1215 | info->rx_std_ctrl.flags = | |
08dddfc3 | 1216 | RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; |
1da177e4 LT |
1217 | |
1218 | memset(ap->rx_std_ring, 0, | |
1219 | RX_STD_RING_ENTRIES * sizeof(struct rx_desc)); | |
1220 | ||
1221 | for (i = 0; i < RX_STD_RING_ENTRIES; i++) | |
1222 | ap->rx_std_ring[i].flags = BD_FLG_TCP_UDP_SUM; | |
1223 | ||
1224 | ap->rx_std_skbprd = 0; | |
1225 | atomic_set(&ap->cur_rx_bufs, 0); | |
1226 | ||
1227 | set_aceaddr(&info->rx_jumbo_ctrl.rngptr, | |
1228 | (ap->rx_ring_base_dma + | |
1229 | (sizeof(struct rx_desc) * RX_STD_RING_ENTRIES))); | |
1230 | info->rx_jumbo_ctrl.max_len = 0; | |
1231 | info->rx_jumbo_ctrl.flags = | |
08dddfc3 | 1232 | RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; |
1da177e4 LT |
1233 | |
1234 | memset(ap->rx_jumbo_ring, 0, | |
1235 | RX_JUMBO_RING_ENTRIES * sizeof(struct rx_desc)); | |
1236 | ||
1237 | for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) | |
1238 | ap->rx_jumbo_ring[i].flags = BD_FLG_TCP_UDP_SUM | BD_FLG_JUMBO; | |
1239 | ||
1240 | ap->rx_jumbo_skbprd = 0; | |
1241 | atomic_set(&ap->cur_jumbo_bufs, 0); | |
1242 | ||
1243 | memset(ap->rx_mini_ring, 0, | |
1244 | RX_MINI_RING_ENTRIES * sizeof(struct rx_desc)); | |
1245 | ||
1246 | if (ap->version >= 2) { | |
1247 | set_aceaddr(&info->rx_mini_ctrl.rngptr, | |
1248 | (ap->rx_ring_base_dma + | |
1249 | (sizeof(struct rx_desc) * | |
1250 | (RX_STD_RING_ENTRIES + | |
1251 | RX_JUMBO_RING_ENTRIES)))); | |
1252 | info->rx_mini_ctrl.max_len = ACE_MINI_SIZE; | |
6aa20a22 | 1253 | info->rx_mini_ctrl.flags = |
08dddfc3 | 1254 | RCB_FLG_TCP_UDP_SUM|RCB_FLG_NO_PSEUDO_HDR|RCB_FLG_VLAN_ASSIST; |
1da177e4 LT |
1255 | |
1256 | for (i = 0; i < RX_MINI_RING_ENTRIES; i++) | |
1257 | ap->rx_mini_ring[i].flags = | |
1258 | BD_FLG_TCP_UDP_SUM | BD_FLG_MINI; | |
1259 | } else { | |
1260 | set_aceaddr(&info->rx_mini_ctrl.rngptr, 0); | |
1261 | info->rx_mini_ctrl.flags = RCB_FLG_RNG_DISABLE; | |
1262 | info->rx_mini_ctrl.max_len = 0; | |
1263 | } | |
1264 | ||
1265 | ap->rx_mini_skbprd = 0; | |
1266 | atomic_set(&ap->cur_mini_bufs, 0); | |
1267 | ||
1268 | set_aceaddr(&info->rx_return_ctrl.rngptr, | |
1269 | (ap->rx_ring_base_dma + | |
1270 | (sizeof(struct rx_desc) * | |
1271 | (RX_STD_RING_ENTRIES + | |
1272 | RX_JUMBO_RING_ENTRIES + | |
1273 | RX_MINI_RING_ENTRIES)))); | |
1274 | info->rx_return_ctrl.flags = 0; | |
1275 | info->rx_return_ctrl.max_len = RX_RETURN_RING_ENTRIES; | |
1276 | ||
1277 | memset(ap->rx_return_ring, 0, | |
1278 | RX_RETURN_RING_ENTRIES * sizeof(struct rx_desc)); | |
1279 | ||
1280 | set_aceaddr(&info->rx_ret_prd_ptr, ap->rx_ret_prd_dma); | |
1281 | *(ap->rx_ret_prd) = 0; | |
1282 | ||
1283 | writel(TX_RING_BASE, ®s->WinBase); | |
1284 | ||
1285 | if (ACE_IS_TIGON_I(ap)) { | |
ddfce6bb | 1286 | ap->tx_ring = (__force struct tx_desc *) regs->Window; |
6aa20a22 | 1287 | for (i = 0; i < (TIGON_I_TX_RING_ENTRIES |
1da177e4 | 1288 | * sizeof(struct tx_desc)) / sizeof(u32); i++) |
ddfce6bb | 1289 | writel(0, (__force void __iomem *)ap->tx_ring + i * 4); |
1da177e4 LT |
1290 | |
1291 | set_aceaddr(&info->tx_ctrl.rngptr, TX_RING_BASE); | |
1292 | } else { | |
1293 | memset(ap->tx_ring, 0, | |
1294 | MAX_TX_RING_ENTRIES * sizeof(struct tx_desc)); | |
1295 | ||
1296 | set_aceaddr(&info->tx_ctrl.rngptr, ap->tx_ring_dma); | |
1297 | } | |
1298 | ||
1299 | info->tx_ctrl.max_len = ACE_TX_RING_ENTRIES(ap); | |
08dddfc3 | 1300 | tmp = RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; |
1da177e4 LT |
1301 | |
1302 | /* | |
1303 | * The Tigon I does not like having the TX ring in host memory ;-( | |
1304 | */ | |
1305 | if (!ACE_IS_TIGON_I(ap)) | |
1306 | tmp |= RCB_FLG_TX_HOST_RING; | |
1307 | #if TX_COAL_INTS_ONLY | |
1308 | tmp |= RCB_FLG_COAL_INT_ONLY; | |
1309 | #endif | |
1310 | info->tx_ctrl.flags = tmp; | |
1311 | ||
1312 | set_aceaddr(&info->tx_csm_ptr, ap->tx_csm_dma); | |
1313 | ||
1314 | /* | |
1315 | * Potential item for tuning parameter | |
1316 | */ | |
1317 | #if 0 /* NO */ | |
1318 | writel(DMA_THRESH_16W, ®s->DmaReadCfg); | |
1319 | writel(DMA_THRESH_16W, ®s->DmaWriteCfg); | |
1320 | #else | |
1321 | writel(DMA_THRESH_8W, ®s->DmaReadCfg); | |
1322 | writel(DMA_THRESH_8W, ®s->DmaWriteCfg); | |
1323 | #endif | |
1324 | ||
1325 | writel(0, ®s->MaskInt); | |
1326 | writel(1, ®s->IfIdx); | |
1327 | #if 0 | |
1328 | /* | |
1329 | * McKinley boxes do not like us fiddling with AssistState | |
1330 | * this early | |
1331 | */ | |
1332 | writel(1, ®s->AssistState); | |
1333 | #endif | |
1334 | ||
1335 | writel(DEF_STAT, ®s->TuneStatTicks); | |
1336 | writel(DEF_TRACE, ®s->TuneTrace); | |
1337 | ||
1338 | ace_set_rxtx_parms(dev, 0); | |
1339 | ||
1340 | if (board_idx == BOARD_IDX_OVERFLOW) { | |
1341 | printk(KERN_WARNING "%s: more than %i NICs detected, " | |
1342 | "ignoring module parameters!\n", | |
1343 | ap->name, ACE_MAX_MOD_PARMS); | |
1344 | } else if (board_idx >= 0) { | |
1345 | if (tx_coal_tick[board_idx]) | |
1346 | writel(tx_coal_tick[board_idx], | |
1347 | ®s->TuneTxCoalTicks); | |
1348 | if (max_tx_desc[board_idx]) | |
1349 | writel(max_tx_desc[board_idx], ®s->TuneMaxTxDesc); | |
1350 | ||
1351 | if (rx_coal_tick[board_idx]) | |
1352 | writel(rx_coal_tick[board_idx], | |
1353 | ®s->TuneRxCoalTicks); | |
1354 | if (max_rx_desc[board_idx]) | |
1355 | writel(max_rx_desc[board_idx], ®s->TuneMaxRxDesc); | |
1356 | ||
1357 | if (trace[board_idx]) | |
1358 | writel(trace[board_idx], ®s->TuneTrace); | |
1359 | ||
1360 | if ((tx_ratio[board_idx] > 0) && (tx_ratio[board_idx] < 64)) | |
1361 | writel(tx_ratio[board_idx], ®s->TxBufRat); | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * Default link parameters | |
1366 | */ | |
1367 | tmp = LNK_ENABLE | LNK_FULL_DUPLEX | LNK_1000MB | LNK_100MB | | |
1368 | LNK_10MB | LNK_RX_FLOW_CTL_Y | LNK_NEG_FCTL | LNK_NEGOTIATE; | |
1369 | if(ap->version >= 2) | |
1370 | tmp |= LNK_TX_FLOW_CTL_Y; | |
1371 | ||
1372 | /* | |
1373 | * Override link default parameters | |
1374 | */ | |
ddfce6bb SH |
1375 | if ((board_idx >= 0) && link_state[board_idx]) { |
1376 | int option = link_state[board_idx]; | |
1da177e4 LT |
1377 | |
1378 | tmp = LNK_ENABLE; | |
1379 | ||
1380 | if (option & 0x01) { | |
1381 | printk(KERN_INFO "%s: Setting half duplex link\n", | |
1382 | ap->name); | |
1383 | tmp &= ~LNK_FULL_DUPLEX; | |
1384 | } | |
1385 | if (option & 0x02) | |
1386 | tmp &= ~LNK_NEGOTIATE; | |
1387 | if (option & 0x10) | |
1388 | tmp |= LNK_10MB; | |
1389 | if (option & 0x20) | |
1390 | tmp |= LNK_100MB; | |
1391 | if (option & 0x40) | |
1392 | tmp |= LNK_1000MB; | |
1393 | if ((option & 0x70) == 0) { | |
1394 | printk(KERN_WARNING "%s: No media speed specified, " | |
1395 | "forcing auto negotiation\n", ap->name); | |
1396 | tmp |= LNK_NEGOTIATE | LNK_1000MB | | |
1397 | LNK_100MB | LNK_10MB; | |
1398 | } | |
1399 | if ((option & 0x100) == 0) | |
1400 | tmp |= LNK_NEG_FCTL; | |
1401 | else | |
1402 | printk(KERN_INFO "%s: Disabling flow control " | |
1403 | "negotiation\n", ap->name); | |
1404 | if (option & 0x200) | |
1405 | tmp |= LNK_RX_FLOW_CTL_Y; | |
1406 | if ((option & 0x400) && (ap->version >= 2)) { | |
1407 | printk(KERN_INFO "%s: Enabling TX flow control\n", | |
1408 | ap->name); | |
1409 | tmp |= LNK_TX_FLOW_CTL_Y; | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | ap->link = tmp; | |
1414 | writel(tmp, ®s->TuneLink); | |
1415 | if (ap->version >= 2) | |
1416 | writel(tmp, ®s->TuneFastLink); | |
1417 | ||
949b4254 | 1418 | writel(ap->firmware_start, ®s->Pc); |
1da177e4 LT |
1419 | |
1420 | writel(0, ®s->Mb0Lo); | |
1421 | ||
1422 | /* | |
1423 | * Set tx_csm before we start receiving interrupts, otherwise | |
1424 | * the interrupt handler might think it is supposed to process | |
1425 | * tx ints before we are up and running, which may cause a null | |
1426 | * pointer access in the int handler. | |
1427 | */ | |
1428 | ap->cur_rx = 0; | |
1429 | ap->tx_prd = *(ap->tx_csm) = ap->tx_ret_csm = 0; | |
1430 | ||
1431 | wmb(); | |
1432 | ace_set_txprd(regs, ap, 0); | |
1433 | writel(0, ®s->RxRetCsm); | |
1434 | ||
1da177e4 LT |
1435 | /* |
1436 | * Enable DMA engine now. | |
1437 | * If we do this sooner, Mckinley box pukes. | |
1438 | * I assume it's because Tigon II DMA engine wants to check | |
1439 | * *something* even before the CPU is started. | |
1440 | */ | |
1441 | writel(1, ®s->AssistState); /* enable DMA */ | |
1442 | ||
1443 | /* | |
1444 | * Start the NIC CPU | |
1445 | */ | |
1446 | writel(readl(®s->CpuCtrl) & ~(CPU_HALT|CPU_TRACE), ®s->CpuCtrl); | |
1447 | readl(®s->CpuCtrl); | |
1448 | ||
1449 | /* | |
1450 | * Wait for the firmware to spin up - max 3 seconds. | |
1451 | */ | |
1452 | myjif = jiffies + 3 * HZ; | |
1453 | while (time_before(jiffies, myjif) && !ap->fw_running) | |
1454 | cpu_relax(); | |
1455 | ||
1456 | if (!ap->fw_running) { | |
1457 | printk(KERN_ERR "%s: Firmware NOT running!\n", ap->name); | |
1458 | ||
1459 | ace_dump_trace(ap); | |
1460 | writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); | |
1461 | readl(®s->CpuCtrl); | |
1462 | ||
1463 | /* aman@sgi.com - account for badly behaving firmware/NIC: | |
1464 | * - have observed that the NIC may continue to generate | |
1465 | * interrupts for some reason; attempt to stop it - halt | |
1466 | * second CPU for Tigon II cards, and also clear Mb0 | |
1467 | * - if we're a module, we'll fail to load if this was | |
1468 | * the only GbE card in the system => if the kernel does | |
1469 | * see an interrupt from the NIC, code to handle it is | |
1470 | * gone and OOps! - so free_irq also | |
1471 | */ | |
1472 | if (ap->version >= 2) | |
1473 | writel(readl(®s->CpuBCtrl) | CPU_HALT, | |
1474 | ®s->CpuBCtrl); | |
1475 | writel(0, ®s->Mb0Lo); | |
1476 | readl(®s->Mb0Lo); | |
1477 | ||
1478 | ecode = -EBUSY; | |
1479 | goto init_error; | |
1480 | } | |
1481 | ||
1482 | /* | |
1483 | * We load the ring here as there seem to be no way to tell the | |
1484 | * firmware to wipe the ring without re-initializing it. | |
1485 | */ | |
1486 | if (!test_and_set_bit(0, &ap->std_refill_busy)) | |
427e21fa | 1487 | ace_load_std_rx_ring(dev, RX_RING_SIZE); |
1da177e4 LT |
1488 | else |
1489 | printk(KERN_ERR "%s: Someone is busy refilling the RX ring\n", | |
1490 | ap->name); | |
1491 | if (ap->version >= 2) { | |
1492 | if (!test_and_set_bit(0, &ap->mini_refill_busy)) | |
427e21fa | 1493 | ace_load_mini_rx_ring(dev, RX_MINI_SIZE); |
1da177e4 LT |
1494 | else |
1495 | printk(KERN_ERR "%s: Someone is busy refilling " | |
1496 | "the RX mini ring\n", ap->name); | |
1497 | } | |
1498 | return 0; | |
1499 | ||
1500 | init_error: | |
1501 | ace_init_cleanup(dev); | |
1502 | return ecode; | |
1503 | } | |
1504 | ||
1505 | ||
1506 | static void ace_set_rxtx_parms(struct net_device *dev, int jumbo) | |
1507 | { | |
1508 | struct ace_private *ap = netdev_priv(dev); | |
1509 | struct ace_regs __iomem *regs = ap->regs; | |
1510 | int board_idx = ap->board_idx; | |
1511 | ||
1512 | if (board_idx >= 0) { | |
1513 | if (!jumbo) { | |
1514 | if (!tx_coal_tick[board_idx]) | |
1515 | writel(DEF_TX_COAL, ®s->TuneTxCoalTicks); | |
1516 | if (!max_tx_desc[board_idx]) | |
1517 | writel(DEF_TX_MAX_DESC, ®s->TuneMaxTxDesc); | |
1518 | if (!rx_coal_tick[board_idx]) | |
1519 | writel(DEF_RX_COAL, ®s->TuneRxCoalTicks); | |
1520 | if (!max_rx_desc[board_idx]) | |
1521 | writel(DEF_RX_MAX_DESC, ®s->TuneMaxRxDesc); | |
1522 | if (!tx_ratio[board_idx]) | |
1523 | writel(DEF_TX_RATIO, ®s->TxBufRat); | |
1524 | } else { | |
1525 | if (!tx_coal_tick[board_idx]) | |
1526 | writel(DEF_JUMBO_TX_COAL, | |
1527 | ®s->TuneTxCoalTicks); | |
1528 | if (!max_tx_desc[board_idx]) | |
1529 | writel(DEF_JUMBO_TX_MAX_DESC, | |
1530 | ®s->TuneMaxTxDesc); | |
1531 | if (!rx_coal_tick[board_idx]) | |
1532 | writel(DEF_JUMBO_RX_COAL, | |
1533 | ®s->TuneRxCoalTicks); | |
1534 | if (!max_rx_desc[board_idx]) | |
1535 | writel(DEF_JUMBO_RX_MAX_DESC, | |
1536 | ®s->TuneMaxRxDesc); | |
1537 | if (!tx_ratio[board_idx]) | |
1538 | writel(DEF_JUMBO_TX_RATIO, ®s->TxBufRat); | |
1539 | } | |
1540 | } | |
1541 | } | |
1542 | ||
1543 | ||
1544 | static void ace_watchdog(struct net_device *data) | |
1545 | { | |
1546 | struct net_device *dev = data; | |
1547 | struct ace_private *ap = netdev_priv(dev); | |
1548 | struct ace_regs __iomem *regs = ap->regs; | |
1549 | ||
1550 | /* | |
1551 | * We haven't received a stats update event for more than 2.5 | |
1552 | * seconds and there is data in the transmit queue, thus we | |
25985edc | 1553 | * assume the card is stuck. |
1da177e4 LT |
1554 | */ |
1555 | if (*ap->tx_csm != ap->tx_ret_csm) { | |
1556 | printk(KERN_WARNING "%s: Transmitter is stuck, %08x\n", | |
1557 | dev->name, (unsigned int)readl(®s->HostCtrl)); | |
1558 | /* This can happen due to ieee flow control. */ | |
1559 | } else { | |
1560 | printk(KERN_DEBUG "%s: BUG... transmitter died. Kicking it.\n", | |
1561 | dev->name); | |
1562 | #if 0 | |
1563 | netif_wake_queue(dev); | |
1564 | #endif | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | ||
427e21fa | 1569 | static void ace_tasklet(unsigned long arg) |
1da177e4 | 1570 | { |
427e21fa | 1571 | struct net_device *dev = (struct net_device *) arg; |
1572 | struct ace_private *ap = netdev_priv(dev); | |
1da177e4 LT |
1573 | int cur_size; |
1574 | ||
1575 | cur_size = atomic_read(&ap->cur_rx_bufs); | |
1576 | if ((cur_size < RX_LOW_STD_THRES) && | |
1577 | !test_and_set_bit(0, &ap->std_refill_busy)) { | |
1578 | #ifdef DEBUG | |
1579 | printk("refilling buffers (current %i)\n", cur_size); | |
1580 | #endif | |
427e21fa | 1581 | ace_load_std_rx_ring(dev, RX_RING_SIZE - cur_size); |
1da177e4 LT |
1582 | } |
1583 | ||
1584 | if (ap->version >= 2) { | |
1585 | cur_size = atomic_read(&ap->cur_mini_bufs); | |
1586 | if ((cur_size < RX_LOW_MINI_THRES) && | |
1587 | !test_and_set_bit(0, &ap->mini_refill_busy)) { | |
1588 | #ifdef DEBUG | |
1589 | printk("refilling mini buffers (current %i)\n", | |
1590 | cur_size); | |
1591 | #endif | |
427e21fa | 1592 | ace_load_mini_rx_ring(dev, RX_MINI_SIZE - cur_size); |
1da177e4 LT |
1593 | } |
1594 | } | |
1595 | ||
1596 | cur_size = atomic_read(&ap->cur_jumbo_bufs); | |
1597 | if (ap->jumbo && (cur_size < RX_LOW_JUMBO_THRES) && | |
1598 | !test_and_set_bit(0, &ap->jumbo_refill_busy)) { | |
1599 | #ifdef DEBUG | |
1600 | printk("refilling jumbo buffers (current %i)\n", cur_size); | |
1601 | #endif | |
427e21fa | 1602 | ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE - cur_size); |
1da177e4 LT |
1603 | } |
1604 | ap->tasklet_pending = 0; | |
1605 | } | |
1606 | ||
1607 | ||
1608 | /* | |
1609 | * Copy the contents of the NIC's trace buffer to kernel memory. | |
1610 | */ | |
1611 | static void ace_dump_trace(struct ace_private *ap) | |
1612 | { | |
1613 | #if 0 | |
1614 | if (!ap->trace_buf) | |
1615 | if (!(ap->trace_buf = kmalloc(ACE_TRACE_SIZE, GFP_KERNEL))) | |
1616 | return; | |
1617 | #endif | |
1618 | } | |
1619 | ||
1620 | ||
1621 | /* | |
1622 | * Load the standard rx ring. | |
1623 | * | |
1624 | * Loading rings is safe without holding the spin lock since this is | |
1625 | * done only before the device is enabled, thus no interrupts are | |
1626 | * generated and by the interrupt handler/tasklet handler. | |
1627 | */ | |
427e21fa | 1628 | static void ace_load_std_rx_ring(struct net_device *dev, int nr_bufs) |
1da177e4 | 1629 | { |
427e21fa | 1630 | struct ace_private *ap = netdev_priv(dev); |
1da177e4 LT |
1631 | struct ace_regs __iomem *regs = ap->regs; |
1632 | short i, idx; | |
6aa20a22 | 1633 | |
1da177e4 LT |
1634 | |
1635 | prefetchw(&ap->cur_rx_bufs); | |
1636 | ||
1637 | idx = ap->rx_std_skbprd; | |
1638 | ||
1639 | for (i = 0; i < nr_bufs; i++) { | |
1640 | struct sk_buff *skb; | |
1641 | struct rx_desc *rd; | |
1642 | dma_addr_t mapping; | |
1643 | ||
427e21fa | 1644 | skb = netdev_alloc_skb_ip_align(dev, ACE_STD_BUFSIZE); |
1da177e4 LT |
1645 | if (!skb) |
1646 | break; | |
1647 | ||
1da177e4 LT |
1648 | mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), |
1649 | offset_in_page(skb->data), | |
1650 | ACE_STD_BUFSIZE, | |
1651 | PCI_DMA_FROMDEVICE); | |
1652 | ap->skb->rx_std_skbuff[idx].skb = skb; | |
430e55b1 | 1653 | dma_unmap_addr_set(&ap->skb->rx_std_skbuff[idx], |
1da177e4 LT |
1654 | mapping, mapping); |
1655 | ||
1656 | rd = &ap->rx_std_ring[idx]; | |
1657 | set_aceaddr(&rd->addr, mapping); | |
1658 | rd->size = ACE_STD_BUFSIZE; | |
1659 | rd->idx = idx; | |
1660 | idx = (idx + 1) % RX_STD_RING_ENTRIES; | |
1661 | } | |
1662 | ||
1663 | if (!i) | |
1664 | goto error_out; | |
1665 | ||
1666 | atomic_add(i, &ap->cur_rx_bufs); | |
1667 | ap->rx_std_skbprd = idx; | |
1668 | ||
1669 | if (ACE_IS_TIGON_I(ap)) { | |
1670 | struct cmd cmd; | |
1671 | cmd.evt = C_SET_RX_PRD_IDX; | |
1672 | cmd.code = 0; | |
1673 | cmd.idx = ap->rx_std_skbprd; | |
1674 | ace_issue_cmd(regs, &cmd); | |
1675 | } else { | |
1676 | writel(idx, ®s->RxStdPrd); | |
1677 | wmb(); | |
1678 | } | |
1679 | ||
1680 | out: | |
1681 | clear_bit(0, &ap->std_refill_busy); | |
1682 | return; | |
1683 | ||
1684 | error_out: | |
1685 | printk(KERN_INFO "Out of memory when allocating " | |
1686 | "standard receive buffers\n"); | |
1687 | goto out; | |
1688 | } | |
1689 | ||
1690 | ||
427e21fa | 1691 | static void ace_load_mini_rx_ring(struct net_device *dev, int nr_bufs) |
1da177e4 | 1692 | { |
427e21fa | 1693 | struct ace_private *ap = netdev_priv(dev); |
1da177e4 LT |
1694 | struct ace_regs __iomem *regs = ap->regs; |
1695 | short i, idx; | |
1696 | ||
1697 | prefetchw(&ap->cur_mini_bufs); | |
1698 | ||
1699 | idx = ap->rx_mini_skbprd; | |
1700 | for (i = 0; i < nr_bufs; i++) { | |
1701 | struct sk_buff *skb; | |
1702 | struct rx_desc *rd; | |
1703 | dma_addr_t mapping; | |
1704 | ||
427e21fa | 1705 | skb = netdev_alloc_skb_ip_align(dev, ACE_MINI_BUFSIZE); |
1da177e4 LT |
1706 | if (!skb) |
1707 | break; | |
1708 | ||
1da177e4 LT |
1709 | mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), |
1710 | offset_in_page(skb->data), | |
1711 | ACE_MINI_BUFSIZE, | |
1712 | PCI_DMA_FROMDEVICE); | |
1713 | ap->skb->rx_mini_skbuff[idx].skb = skb; | |
430e55b1 | 1714 | dma_unmap_addr_set(&ap->skb->rx_mini_skbuff[idx], |
1da177e4 LT |
1715 | mapping, mapping); |
1716 | ||
1717 | rd = &ap->rx_mini_ring[idx]; | |
1718 | set_aceaddr(&rd->addr, mapping); | |
1719 | rd->size = ACE_MINI_BUFSIZE; | |
1720 | rd->idx = idx; | |
1721 | idx = (idx + 1) % RX_MINI_RING_ENTRIES; | |
1722 | } | |
1723 | ||
1724 | if (!i) | |
1725 | goto error_out; | |
1726 | ||
1727 | atomic_add(i, &ap->cur_mini_bufs); | |
1728 | ||
1729 | ap->rx_mini_skbprd = idx; | |
1730 | ||
1731 | writel(idx, ®s->RxMiniPrd); | |
1732 | wmb(); | |
1733 | ||
1734 | out: | |
1735 | clear_bit(0, &ap->mini_refill_busy); | |
1736 | return; | |
1737 | error_out: | |
1738 | printk(KERN_INFO "Out of memory when allocating " | |
1739 | "mini receive buffers\n"); | |
1740 | goto out; | |
1741 | } | |
1742 | ||
1743 | ||
1744 | /* | |
1745 | * Load the jumbo rx ring, this may happen at any time if the MTU | |
1746 | * is changed to a value > 1500. | |
1747 | */ | |
427e21fa | 1748 | static void ace_load_jumbo_rx_ring(struct net_device *dev, int nr_bufs) |
1da177e4 | 1749 | { |
427e21fa | 1750 | struct ace_private *ap = netdev_priv(dev); |
1da177e4 LT |
1751 | struct ace_regs __iomem *regs = ap->regs; |
1752 | short i, idx; | |
1753 | ||
1754 | idx = ap->rx_jumbo_skbprd; | |
1755 | ||
1756 | for (i = 0; i < nr_bufs; i++) { | |
1757 | struct sk_buff *skb; | |
1758 | struct rx_desc *rd; | |
1759 | dma_addr_t mapping; | |
1760 | ||
427e21fa | 1761 | skb = netdev_alloc_skb_ip_align(dev, ACE_JUMBO_BUFSIZE); |
1da177e4 LT |
1762 | if (!skb) |
1763 | break; | |
1764 | ||
1da177e4 LT |
1765 | mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), |
1766 | offset_in_page(skb->data), | |
1767 | ACE_JUMBO_BUFSIZE, | |
1768 | PCI_DMA_FROMDEVICE); | |
1769 | ap->skb->rx_jumbo_skbuff[idx].skb = skb; | |
430e55b1 | 1770 | dma_unmap_addr_set(&ap->skb->rx_jumbo_skbuff[idx], |
1da177e4 LT |
1771 | mapping, mapping); |
1772 | ||
1773 | rd = &ap->rx_jumbo_ring[idx]; | |
1774 | set_aceaddr(&rd->addr, mapping); | |
1775 | rd->size = ACE_JUMBO_BUFSIZE; | |
1776 | rd->idx = idx; | |
1777 | idx = (idx + 1) % RX_JUMBO_RING_ENTRIES; | |
1778 | } | |
1779 | ||
1780 | if (!i) | |
1781 | goto error_out; | |
1782 | ||
1783 | atomic_add(i, &ap->cur_jumbo_bufs); | |
1784 | ap->rx_jumbo_skbprd = idx; | |
1785 | ||
1786 | if (ACE_IS_TIGON_I(ap)) { | |
1787 | struct cmd cmd; | |
1788 | cmd.evt = C_SET_RX_JUMBO_PRD_IDX; | |
1789 | cmd.code = 0; | |
1790 | cmd.idx = ap->rx_jumbo_skbprd; | |
1791 | ace_issue_cmd(regs, &cmd); | |
1792 | } else { | |
1793 | writel(idx, ®s->RxJumboPrd); | |
1794 | wmb(); | |
1795 | } | |
1796 | ||
1797 | out: | |
1798 | clear_bit(0, &ap->jumbo_refill_busy); | |
1799 | return; | |
1800 | error_out: | |
1801 | if (net_ratelimit()) | |
1802 | printk(KERN_INFO "Out of memory when allocating " | |
1803 | "jumbo receive buffers\n"); | |
1804 | goto out; | |
1805 | } | |
1806 | ||
1807 | ||
1808 | /* | |
1809 | * All events are considered to be slow (RX/TX ints do not generate | |
1810 | * events) and are handled here, outside the main interrupt handler, | |
1811 | * to reduce the size of the handler. | |
1812 | */ | |
1813 | static u32 ace_handle_event(struct net_device *dev, u32 evtcsm, u32 evtprd) | |
1814 | { | |
1815 | struct ace_private *ap; | |
1816 | ||
1817 | ap = netdev_priv(dev); | |
1818 | ||
1819 | while (evtcsm != evtprd) { | |
1820 | switch (ap->evt_ring[evtcsm].evt) { | |
1821 | case E_FW_RUNNING: | |
1822 | printk(KERN_INFO "%s: Firmware up and running\n", | |
1823 | ap->name); | |
1824 | ap->fw_running = 1; | |
1825 | wmb(); | |
1826 | break; | |
1827 | case E_STATS_UPDATED: | |
1828 | break; | |
1829 | case E_LNK_STATE: | |
1830 | { | |
1831 | u16 code = ap->evt_ring[evtcsm].code; | |
1832 | switch (code) { | |
1833 | case E_C_LINK_UP: | |
1834 | { | |
1835 | u32 state = readl(&ap->regs->GigLnkState); | |
1836 | printk(KERN_WARNING "%s: Optical link UP " | |
1837 | "(%s Duplex, Flow Control: %s%s)\n", | |
1838 | ap->name, | |
1839 | state & LNK_FULL_DUPLEX ? "Full":"Half", | |
1840 | state & LNK_TX_FLOW_CTL_Y ? "TX " : "", | |
1841 | state & LNK_RX_FLOW_CTL_Y ? "RX" : ""); | |
1842 | break; | |
1843 | } | |
1844 | case E_C_LINK_DOWN: | |
1845 | printk(KERN_WARNING "%s: Optical link DOWN\n", | |
1846 | ap->name); | |
1847 | break; | |
1848 | case E_C_LINK_10_100: | |
1849 | printk(KERN_WARNING "%s: 10/100BaseT link " | |
1850 | "UP\n", ap->name); | |
1851 | break; | |
1852 | default: | |
1853 | printk(KERN_ERR "%s: Unknown optical link " | |
1854 | "state %02x\n", ap->name, code); | |
1855 | } | |
1856 | break; | |
1857 | } | |
1858 | case E_ERROR: | |
1859 | switch(ap->evt_ring[evtcsm].code) { | |
1860 | case E_C_ERR_INVAL_CMD: | |
1861 | printk(KERN_ERR "%s: invalid command error\n", | |
1862 | ap->name); | |
1863 | break; | |
1864 | case E_C_ERR_UNIMP_CMD: | |
1865 | printk(KERN_ERR "%s: unimplemented command " | |
1866 | "error\n", ap->name); | |
1867 | break; | |
1868 | case E_C_ERR_BAD_CFG: | |
1869 | printk(KERN_ERR "%s: bad config error\n", | |
1870 | ap->name); | |
1871 | break; | |
1872 | default: | |
1873 | printk(KERN_ERR "%s: unknown error %02x\n", | |
1874 | ap->name, ap->evt_ring[evtcsm].code); | |
1875 | } | |
1876 | break; | |
1877 | case E_RESET_JUMBO_RNG: | |
1878 | { | |
1879 | int i; | |
1880 | for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) { | |
1881 | if (ap->skb->rx_jumbo_skbuff[i].skb) { | |
1882 | ap->rx_jumbo_ring[i].size = 0; | |
1883 | set_aceaddr(&ap->rx_jumbo_ring[i].addr, 0); | |
1884 | dev_kfree_skb(ap->skb->rx_jumbo_skbuff[i].skb); | |
1885 | ap->skb->rx_jumbo_skbuff[i].skb = NULL; | |
1886 | } | |
1887 | } | |
1888 | ||
1889 | if (ACE_IS_TIGON_I(ap)) { | |
1890 | struct cmd cmd; | |
1891 | cmd.evt = C_SET_RX_JUMBO_PRD_IDX; | |
1892 | cmd.code = 0; | |
1893 | cmd.idx = 0; | |
1894 | ace_issue_cmd(ap->regs, &cmd); | |
1895 | } else { | |
1896 | writel(0, &((ap->regs)->RxJumboPrd)); | |
1897 | wmb(); | |
1898 | } | |
1899 | ||
1900 | ap->jumbo = 0; | |
1901 | ap->rx_jumbo_skbprd = 0; | |
1902 | printk(KERN_INFO "%s: Jumbo ring flushed\n", | |
1903 | ap->name); | |
1904 | clear_bit(0, &ap->jumbo_refill_busy); | |
1905 | break; | |
1906 | } | |
1907 | default: | |
1908 | printk(KERN_ERR "%s: Unhandled event 0x%02x\n", | |
1909 | ap->name, ap->evt_ring[evtcsm].evt); | |
1910 | } | |
1911 | evtcsm = (evtcsm + 1) % EVT_RING_ENTRIES; | |
1912 | } | |
1913 | ||
1914 | return evtcsm; | |
1915 | } | |
1916 | ||
1917 | ||
1918 | static void ace_rx_int(struct net_device *dev, u32 rxretprd, u32 rxretcsm) | |
1919 | { | |
1920 | struct ace_private *ap = netdev_priv(dev); | |
1921 | u32 idx; | |
1922 | int mini_count = 0, std_count = 0; | |
1923 | ||
1924 | idx = rxretcsm; | |
1925 | ||
1926 | prefetchw(&ap->cur_rx_bufs); | |
1927 | prefetchw(&ap->cur_mini_bufs); | |
6aa20a22 | 1928 | |
1da177e4 LT |
1929 | while (idx != rxretprd) { |
1930 | struct ring_info *rip; | |
1931 | struct sk_buff *skb; | |
1932 | struct rx_desc *rxdesc, *retdesc; | |
1933 | u32 skbidx; | |
1934 | int bd_flags, desc_type, mapsize; | |
1935 | u16 csum; | |
1936 | ||
1937 | ||
1938 | /* make sure the rx descriptor isn't read before rxretprd */ | |
6aa20a22 | 1939 | if (idx == rxretcsm) |
1da177e4 LT |
1940 | rmb(); |
1941 | ||
1942 | retdesc = &ap->rx_return_ring[idx]; | |
1943 | skbidx = retdesc->idx; | |
1944 | bd_flags = retdesc->flags; | |
1945 | desc_type = bd_flags & (BD_FLG_JUMBO | BD_FLG_MINI); | |
1946 | ||
1947 | switch(desc_type) { | |
1948 | /* | |
1949 | * Normal frames do not have any flags set | |
1950 | * | |
1951 | * Mini and normal frames arrive frequently, | |
1952 | * so use a local counter to avoid doing | |
1953 | * atomic operations for each packet arriving. | |
1954 | */ | |
1955 | case 0: | |
1956 | rip = &ap->skb->rx_std_skbuff[skbidx]; | |
1957 | mapsize = ACE_STD_BUFSIZE; | |
1958 | rxdesc = &ap->rx_std_ring[skbidx]; | |
1959 | std_count++; | |
1960 | break; | |
1961 | case BD_FLG_JUMBO: | |
1962 | rip = &ap->skb->rx_jumbo_skbuff[skbidx]; | |
1963 | mapsize = ACE_JUMBO_BUFSIZE; | |
1964 | rxdesc = &ap->rx_jumbo_ring[skbidx]; | |
1965 | atomic_dec(&ap->cur_jumbo_bufs); | |
1966 | break; | |
1967 | case BD_FLG_MINI: | |
1968 | rip = &ap->skb->rx_mini_skbuff[skbidx]; | |
1969 | mapsize = ACE_MINI_BUFSIZE; | |
1970 | rxdesc = &ap->rx_mini_ring[skbidx]; | |
6aa20a22 | 1971 | mini_count++; |
1da177e4 LT |
1972 | break; |
1973 | default: | |
1974 | printk(KERN_INFO "%s: unknown frame type (0x%02x) " | |
1975 | "returned by NIC\n", dev->name, | |
1976 | retdesc->flags); | |
1977 | goto error; | |
1978 | } | |
1979 | ||
1980 | skb = rip->skb; | |
1981 | rip->skb = NULL; | |
1982 | pci_unmap_page(ap->pdev, | |
430e55b1 | 1983 | dma_unmap_addr(rip, mapping), |
1da177e4 LT |
1984 | mapsize, |
1985 | PCI_DMA_FROMDEVICE); | |
1986 | skb_put(skb, retdesc->size); | |
1987 | ||
1988 | /* | |
1989 | * Fly baby, fly! | |
1990 | */ | |
1991 | csum = retdesc->tcp_udp_csum; | |
1992 | ||
1da177e4 LT |
1993 | skb->protocol = eth_type_trans(skb, dev); |
1994 | ||
1995 | /* | |
1996 | * Instead of forcing the poor tigon mips cpu to calculate | |
1997 | * pseudo hdr checksum, we do this ourselves. | |
1998 | */ | |
1999 | if (bd_flags & BD_FLG_TCP_UDP_SUM) { | |
2000 | skb->csum = htons(csum); | |
84fa7933 | 2001 | skb->ip_summed = CHECKSUM_COMPLETE; |
1da177e4 | 2002 | } else { |
bc8acf2c | 2003 | skb_checksum_none_assert(skb); |
1da177e4 LT |
2004 | } |
2005 | ||
2006 | /* send it up */ | |
08dddfc3 | 2007 | if ((bd_flags & BD_FLG_VLAN_TAG)) |
86a9bad3 | 2008 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), retdesc->vlan); |
08dddfc3 | 2009 | netif_rx(skb); |
1da177e4 | 2010 | |
966e37bc PZ |
2011 | dev->stats.rx_packets++; |
2012 | dev->stats.rx_bytes += retdesc->size; | |
1da177e4 LT |
2013 | |
2014 | idx = (idx + 1) % RX_RETURN_RING_ENTRIES; | |
2015 | } | |
2016 | ||
2017 | atomic_sub(std_count, &ap->cur_rx_bufs); | |
2018 | if (!ACE_IS_TIGON_I(ap)) | |
2019 | atomic_sub(mini_count, &ap->cur_mini_bufs); | |
2020 | ||
2021 | out: | |
2022 | /* | |
2023 | * According to the documentation RxRetCsm is obsolete with | |
2024 | * the 12.3.x Firmware - my Tigon I NICs seem to disagree! | |
2025 | */ | |
2026 | if (ACE_IS_TIGON_I(ap)) { | |
2027 | writel(idx, &ap->regs->RxRetCsm); | |
2028 | } | |
2029 | ap->cur_rx = idx; | |
2030 | ||
2031 | return; | |
2032 | error: | |
2033 | idx = rxretprd; | |
2034 | goto out; | |
2035 | } | |
2036 | ||
2037 | ||
2038 | static inline void ace_tx_int(struct net_device *dev, | |
2039 | u32 txcsm, u32 idx) | |
2040 | { | |
2041 | struct ace_private *ap = netdev_priv(dev); | |
2042 | ||
2043 | do { | |
2044 | struct sk_buff *skb; | |
1da177e4 LT |
2045 | struct tx_ring_info *info; |
2046 | ||
2047 | info = ap->skb->tx_skbuff + idx; | |
2048 | skb = info->skb; | |
1da177e4 | 2049 | |
07e7de8f FT |
2050 | if (dma_unmap_len(info, maplen)) { |
2051 | pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping), | |
430e55b1 | 2052 | dma_unmap_len(info, maplen), |
1da177e4 | 2053 | PCI_DMA_TODEVICE); |
07e7de8f | 2054 | dma_unmap_len_set(info, maplen, 0); |
1da177e4 LT |
2055 | } |
2056 | ||
2057 | if (skb) { | |
966e37bc PZ |
2058 | dev->stats.tx_packets++; |
2059 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
2060 | dev_kfree_skb_irq(skb); |
2061 | info->skb = NULL; | |
2062 | } | |
2063 | ||
2064 | idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); | |
2065 | } while (idx != txcsm); | |
2066 | ||
2067 | if (netif_queue_stopped(dev)) | |
2068 | netif_wake_queue(dev); | |
2069 | ||
2070 | wmb(); | |
2071 | ap->tx_ret_csm = txcsm; | |
2072 | ||
2073 | /* So... tx_ret_csm is advanced _after_ check for device wakeup. | |
2074 | * | |
2075 | * We could try to make it before. In this case we would get | |
2076 | * the following race condition: hard_start_xmit on other cpu | |
2077 | * enters after we advanced tx_ret_csm and fills space, | |
2078 | * which we have just freed, so that we make illegal device wakeup. | |
2079 | * There is no good way to workaround this (at entry | |
2080 | * to ace_start_xmit detects this condition and prevents | |
2081 | * ring corruption, but it is not a good workaround.) | |
2082 | * | |
2083 | * When tx_ret_csm is advanced after, we wake up device _only_ | |
2084 | * if we really have some space in ring (though the core doing | |
2085 | * hard_start_xmit can see full ring for some period and has to | |
2086 | * synchronize.) Superb. | |
2087 | * BUT! We get another subtle race condition. hard_start_xmit | |
2088 | * may think that ring is full between wakeup and advancing | |
2089 | * tx_ret_csm and will stop device instantly! It is not so bad. | |
2090 | * We are guaranteed that there is something in ring, so that | |
2091 | * the next irq will resume transmission. To speedup this we could | |
2092 | * mark descriptor, which closes ring with BD_FLG_COAL_NOW | |
2093 | * (see ace_start_xmit). | |
2094 | * | |
2095 | * Well, this dilemma exists in all lock-free devices. | |
2096 | * We, following scheme used in drivers by Donald Becker, | |
2097 | * select the least dangerous. | |
2098 | * --ANK | |
2099 | */ | |
2100 | } | |
2101 | ||
2102 | ||
7d12e780 | 2103 | static irqreturn_t ace_interrupt(int irq, void *dev_id) |
1da177e4 LT |
2104 | { |
2105 | struct net_device *dev = (struct net_device *)dev_id; | |
2106 | struct ace_private *ap = netdev_priv(dev); | |
2107 | struct ace_regs __iomem *regs = ap->regs; | |
2108 | u32 idx; | |
2109 | u32 txcsm, rxretcsm, rxretprd; | |
2110 | u32 evtcsm, evtprd; | |
2111 | ||
2112 | /* | |
2113 | * In case of PCI shared interrupts or spurious interrupts, | |
2114 | * we want to make sure it is actually our interrupt before | |
2115 | * spending any time in here. | |
2116 | */ | |
2117 | if (!(readl(®s->HostCtrl) & IN_INT)) | |
2118 | return IRQ_NONE; | |
2119 | ||
2120 | /* | |
2121 | * ACK intr now. Otherwise we will lose updates to rx_ret_prd, | |
2122 | * which happened _after_ rxretprd = *ap->rx_ret_prd; but before | |
2123 | * writel(0, ®s->Mb0Lo). | |
2124 | * | |
2125 | * "IRQ avoidance" recommended in docs applies to IRQs served | |
2126 | * threads and it is wrong even for that case. | |
2127 | */ | |
2128 | writel(0, ®s->Mb0Lo); | |
2129 | readl(®s->Mb0Lo); | |
2130 | ||
2131 | /* | |
2132 | * There is no conflict between transmit handling in | |
2133 | * start_xmit and receive processing, thus there is no reason | |
2134 | * to take a spin lock for RX handling. Wait until we start | |
2135 | * working on the other stuff - hey we don't need a spin lock | |
2136 | * anymore. | |
2137 | */ | |
2138 | rxretprd = *ap->rx_ret_prd; | |
2139 | rxretcsm = ap->cur_rx; | |
2140 | ||
2141 | if (rxretprd != rxretcsm) | |
2142 | ace_rx_int(dev, rxretprd, rxretcsm); | |
2143 | ||
2144 | txcsm = *ap->tx_csm; | |
2145 | idx = ap->tx_ret_csm; | |
2146 | ||
2147 | if (txcsm != idx) { | |
2148 | /* | |
2149 | * If each skb takes only one descriptor this check degenerates | |
2150 | * to identity, because new space has just been opened. | |
2151 | * But if skbs are fragmented we must check that this index | |
2152 | * update releases enough of space, otherwise we just | |
2153 | * wait for device to make more work. | |
2154 | */ | |
2155 | if (!tx_ring_full(ap, txcsm, ap->tx_prd)) | |
2156 | ace_tx_int(dev, txcsm, idx); | |
2157 | } | |
2158 | ||
2159 | evtcsm = readl(®s->EvtCsm); | |
2160 | evtprd = *ap->evt_prd; | |
2161 | ||
2162 | if (evtcsm != evtprd) { | |
2163 | evtcsm = ace_handle_event(dev, evtcsm, evtprd); | |
2164 | writel(evtcsm, ®s->EvtCsm); | |
2165 | } | |
2166 | ||
2167 | /* | |
2168 | * This has to go last in the interrupt handler and run with | |
2169 | * the spin lock released ... what lock? | |
2170 | */ | |
2171 | if (netif_running(dev)) { | |
2172 | int cur_size; | |
2173 | int run_tasklet = 0; | |
2174 | ||
2175 | cur_size = atomic_read(&ap->cur_rx_bufs); | |
2176 | if (cur_size < RX_LOW_STD_THRES) { | |
2177 | if ((cur_size < RX_PANIC_STD_THRES) && | |
2178 | !test_and_set_bit(0, &ap->std_refill_busy)) { | |
2179 | #ifdef DEBUG | |
2180 | printk("low on std buffers %i\n", cur_size); | |
2181 | #endif | |
427e21fa | 2182 | ace_load_std_rx_ring(dev, |
1da177e4 LT |
2183 | RX_RING_SIZE - cur_size); |
2184 | } else | |
2185 | run_tasklet = 1; | |
2186 | } | |
2187 | ||
2188 | if (!ACE_IS_TIGON_I(ap)) { | |
2189 | cur_size = atomic_read(&ap->cur_mini_bufs); | |
2190 | if (cur_size < RX_LOW_MINI_THRES) { | |
2191 | if ((cur_size < RX_PANIC_MINI_THRES) && | |
2192 | !test_and_set_bit(0, | |
2193 | &ap->mini_refill_busy)) { | |
2194 | #ifdef DEBUG | |
2195 | printk("low on mini buffers %i\n", | |
2196 | cur_size); | |
2197 | #endif | |
427e21fa | 2198 | ace_load_mini_rx_ring(dev, |
2199 | RX_MINI_SIZE - cur_size); | |
1da177e4 LT |
2200 | } else |
2201 | run_tasklet = 1; | |
2202 | } | |
2203 | } | |
2204 | ||
2205 | if (ap->jumbo) { | |
2206 | cur_size = atomic_read(&ap->cur_jumbo_bufs); | |
2207 | if (cur_size < RX_LOW_JUMBO_THRES) { | |
2208 | if ((cur_size < RX_PANIC_JUMBO_THRES) && | |
2209 | !test_and_set_bit(0, | |
2210 | &ap->jumbo_refill_busy)){ | |
2211 | #ifdef DEBUG | |
2212 | printk("low on jumbo buffers %i\n", | |
2213 | cur_size); | |
2214 | #endif | |
427e21fa | 2215 | ace_load_jumbo_rx_ring(dev, |
2216 | RX_JUMBO_SIZE - cur_size); | |
1da177e4 LT |
2217 | } else |
2218 | run_tasklet = 1; | |
2219 | } | |
2220 | } | |
2221 | if (run_tasklet && !ap->tasklet_pending) { | |
2222 | ap->tasklet_pending = 1; | |
2223 | tasklet_schedule(&ap->ace_tasklet); | |
2224 | } | |
2225 | } | |
2226 | ||
2227 | return IRQ_HANDLED; | |
2228 | } | |
2229 | ||
1da177e4 LT |
2230 | static int ace_open(struct net_device *dev) |
2231 | { | |
2232 | struct ace_private *ap = netdev_priv(dev); | |
2233 | struct ace_regs __iomem *regs = ap->regs; | |
2234 | struct cmd cmd; | |
2235 | ||
2236 | if (!(ap->fw_running)) { | |
2237 | printk(KERN_WARNING "%s: Firmware not running!\n", dev->name); | |
2238 | return -EBUSY; | |
2239 | } | |
2240 | ||
2241 | writel(dev->mtu + ETH_HLEN + 4, ®s->IfMtu); | |
2242 | ||
2243 | cmd.evt = C_CLEAR_STATS; | |
2244 | cmd.code = 0; | |
2245 | cmd.idx = 0; | |
2246 | ace_issue_cmd(regs, &cmd); | |
2247 | ||
2248 | cmd.evt = C_HOST_STATE; | |
2249 | cmd.code = C_C_STACK_UP; | |
2250 | cmd.idx = 0; | |
2251 | ace_issue_cmd(regs, &cmd); | |
2252 | ||
2253 | if (ap->jumbo && | |
2254 | !test_and_set_bit(0, &ap->jumbo_refill_busy)) | |
427e21fa | 2255 | ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE); |
1da177e4 LT |
2256 | |
2257 | if (dev->flags & IFF_PROMISC) { | |
2258 | cmd.evt = C_SET_PROMISC_MODE; | |
2259 | cmd.code = C_C_PROMISC_ENABLE; | |
2260 | cmd.idx = 0; | |
2261 | ace_issue_cmd(regs, &cmd); | |
2262 | ||
2263 | ap->promisc = 1; | |
2264 | }else | |
2265 | ap->promisc = 0; | |
2266 | ap->mcast_all = 0; | |
2267 | ||
2268 | #if 0 | |
2269 | cmd.evt = C_LNK_NEGOTIATION; | |
2270 | cmd.code = 0; | |
2271 | cmd.idx = 0; | |
2272 | ace_issue_cmd(regs, &cmd); | |
2273 | #endif | |
2274 | ||
2275 | netif_start_queue(dev); | |
2276 | ||
2277 | /* | |
2278 | * Setup the bottom half rx ring refill handler | |
2279 | */ | |
2280 | tasklet_init(&ap->ace_tasklet, ace_tasklet, (unsigned long)dev); | |
2281 | return 0; | |
2282 | } | |
2283 | ||
2284 | ||
2285 | static int ace_close(struct net_device *dev) | |
2286 | { | |
2287 | struct ace_private *ap = netdev_priv(dev); | |
2288 | struct ace_regs __iomem *regs = ap->regs; | |
2289 | struct cmd cmd; | |
2290 | unsigned long flags; | |
2291 | short i; | |
2292 | ||
2293 | /* | |
2294 | * Without (or before) releasing irq and stopping hardware, this | |
2295 | * is an absolute non-sense, by the way. It will be reset instantly | |
2296 | * by the first irq. | |
2297 | */ | |
2298 | netif_stop_queue(dev); | |
2299 | ||
6aa20a22 | 2300 | |
1da177e4 LT |
2301 | if (ap->promisc) { |
2302 | cmd.evt = C_SET_PROMISC_MODE; | |
2303 | cmd.code = C_C_PROMISC_DISABLE; | |
2304 | cmd.idx = 0; | |
2305 | ace_issue_cmd(regs, &cmd); | |
2306 | ap->promisc = 0; | |
2307 | } | |
2308 | ||
2309 | cmd.evt = C_HOST_STATE; | |
2310 | cmd.code = C_C_STACK_DOWN; | |
2311 | cmd.idx = 0; | |
2312 | ace_issue_cmd(regs, &cmd); | |
2313 | ||
2314 | tasklet_kill(&ap->ace_tasklet); | |
2315 | ||
2316 | /* | |
2317 | * Make sure one CPU is not processing packets while | |
2318 | * buffers are being released by another. | |
2319 | */ | |
2320 | ||
2321 | local_irq_save(flags); | |
2322 | ace_mask_irq(dev); | |
2323 | ||
2324 | for (i = 0; i < ACE_TX_RING_ENTRIES(ap); i++) { | |
2325 | struct sk_buff *skb; | |
1da177e4 LT |
2326 | struct tx_ring_info *info; |
2327 | ||
2328 | info = ap->skb->tx_skbuff + i; | |
2329 | skb = info->skb; | |
1da177e4 | 2330 | |
07e7de8f | 2331 | if (dma_unmap_len(info, maplen)) { |
1da177e4 | 2332 | if (ACE_IS_TIGON_I(ap)) { |
ddfce6bb SH |
2333 | /* NB: TIGON_1 is special, tx_ring is in io space */ |
2334 | struct tx_desc __iomem *tx; | |
2335 | tx = (__force struct tx_desc __iomem *) &ap->tx_ring[i]; | |
1da177e4 LT |
2336 | writel(0, &tx->addr.addrhi); |
2337 | writel(0, &tx->addr.addrlo); | |
2338 | writel(0, &tx->flagsize); | |
2339 | } else | |
2340 | memset(ap->tx_ring + i, 0, | |
2341 | sizeof(struct tx_desc)); | |
07e7de8f | 2342 | pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping), |
430e55b1 | 2343 | dma_unmap_len(info, maplen), |
1da177e4 | 2344 | PCI_DMA_TODEVICE); |
07e7de8f | 2345 | dma_unmap_len_set(info, maplen, 0); |
1da177e4 LT |
2346 | } |
2347 | if (skb) { | |
2348 | dev_kfree_skb(skb); | |
2349 | info->skb = NULL; | |
2350 | } | |
2351 | } | |
2352 | ||
2353 | if (ap->jumbo) { | |
2354 | cmd.evt = C_RESET_JUMBO_RNG; | |
2355 | cmd.code = 0; | |
2356 | cmd.idx = 0; | |
2357 | ace_issue_cmd(regs, &cmd); | |
2358 | } | |
2359 | ||
2360 | ace_unmask_irq(dev); | |
2361 | local_irq_restore(flags); | |
2362 | ||
2363 | return 0; | |
2364 | } | |
2365 | ||
2366 | ||
2367 | static inline dma_addr_t | |
2368 | ace_map_tx_skb(struct ace_private *ap, struct sk_buff *skb, | |
2369 | struct sk_buff *tail, u32 idx) | |
2370 | { | |
2371 | dma_addr_t mapping; | |
2372 | struct tx_ring_info *info; | |
2373 | ||
2374 | mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), | |
2375 | offset_in_page(skb->data), | |
2376 | skb->len, PCI_DMA_TODEVICE); | |
2377 | ||
2378 | info = ap->skb->tx_skbuff + idx; | |
2379 | info->skb = tail; | |
430e55b1 FT |
2380 | dma_unmap_addr_set(info, mapping, mapping); |
2381 | dma_unmap_len_set(info, maplen, skb->len); | |
1da177e4 LT |
2382 | return mapping; |
2383 | } | |
2384 | ||
2385 | ||
2386 | static inline void | |
2387 | ace_load_tx_bd(struct ace_private *ap, struct tx_desc *desc, u64 addr, | |
2388 | u32 flagsize, u32 vlan_tag) | |
2389 | { | |
2390 | #if !USE_TX_COAL_NOW | |
2391 | flagsize &= ~BD_FLG_COAL_NOW; | |
2392 | #endif | |
2393 | ||
2394 | if (ACE_IS_TIGON_I(ap)) { | |
ddfce6bb | 2395 | struct tx_desc __iomem *io = (__force struct tx_desc __iomem *) desc; |
1da177e4 LT |
2396 | writel(addr >> 32, &io->addr.addrhi); |
2397 | writel(addr & 0xffffffff, &io->addr.addrlo); | |
2398 | writel(flagsize, &io->flagsize); | |
1da177e4 | 2399 | writel(vlan_tag, &io->vlanres); |
1da177e4 LT |
2400 | } else { |
2401 | desc->addr.addrhi = addr >> 32; | |
2402 | desc->addr.addrlo = addr; | |
2403 | desc->flagsize = flagsize; | |
1da177e4 | 2404 | desc->vlanres = vlan_tag; |
1da177e4 LT |
2405 | } |
2406 | } | |
2407 | ||
2408 | ||
61357325 SH |
2409 | static netdev_tx_t ace_start_xmit(struct sk_buff *skb, |
2410 | struct net_device *dev) | |
1da177e4 LT |
2411 | { |
2412 | struct ace_private *ap = netdev_priv(dev); | |
2413 | struct ace_regs __iomem *regs = ap->regs; | |
2414 | struct tx_desc *desc; | |
2415 | u32 idx, flagsize; | |
2416 | unsigned long maxjiff = jiffies + 3*HZ; | |
2417 | ||
2418 | restart: | |
2419 | idx = ap->tx_prd; | |
2420 | ||
2421 | if (tx_ring_full(ap, ap->tx_ret_csm, idx)) | |
2422 | goto overflow; | |
2423 | ||
2424 | if (!skb_shinfo(skb)->nr_frags) { | |
2425 | dma_addr_t mapping; | |
2426 | u32 vlan_tag = 0; | |
2427 | ||
2428 | mapping = ace_map_tx_skb(ap, skb, skb, idx); | |
2429 | flagsize = (skb->len << 16) | (BD_FLG_END); | |
84fa7933 | 2430 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
1da177e4 | 2431 | flagsize |= BD_FLG_TCP_UDP_SUM; |
1da177e4 LT |
2432 | if (vlan_tx_tag_present(skb)) { |
2433 | flagsize |= BD_FLG_VLAN_TAG; | |
2434 | vlan_tag = vlan_tx_tag_get(skb); | |
2435 | } | |
1da177e4 LT |
2436 | desc = ap->tx_ring + idx; |
2437 | idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); | |
2438 | ||
2439 | /* Look at ace_tx_int for explanations. */ | |
2440 | if (tx_ring_full(ap, ap->tx_ret_csm, idx)) | |
2441 | flagsize |= BD_FLG_COAL_NOW; | |
2442 | ||
2443 | ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag); | |
2444 | } else { | |
2445 | dma_addr_t mapping; | |
2446 | u32 vlan_tag = 0; | |
2447 | int i, len = 0; | |
2448 | ||
2449 | mapping = ace_map_tx_skb(ap, skb, NULL, idx); | |
2450 | flagsize = (skb_headlen(skb) << 16); | |
84fa7933 | 2451 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
1da177e4 | 2452 | flagsize |= BD_FLG_TCP_UDP_SUM; |
1da177e4 LT |
2453 | if (vlan_tx_tag_present(skb)) { |
2454 | flagsize |= BD_FLG_VLAN_TAG; | |
2455 | vlan_tag = vlan_tx_tag_get(skb); | |
2456 | } | |
1da177e4 LT |
2457 | |
2458 | ace_load_tx_bd(ap, ap->tx_ring + idx, mapping, flagsize, vlan_tag); | |
2459 | ||
2460 | idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); | |
2461 | ||
2462 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 2463 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
1da177e4 LT |
2464 | struct tx_ring_info *info; |
2465 | ||
9e903e08 | 2466 | len += skb_frag_size(frag); |
1da177e4 LT |
2467 | info = ap->skb->tx_skbuff + idx; |
2468 | desc = ap->tx_ring + idx; | |
2469 | ||
c4c8d579 | 2470 | mapping = skb_frag_dma_map(&ap->pdev->dev, frag, 0, |
9e903e08 | 2471 | skb_frag_size(frag), |
5d6bcdfe | 2472 | DMA_TO_DEVICE); |
1da177e4 | 2473 | |
9e903e08 | 2474 | flagsize = skb_frag_size(frag) << 16; |
84fa7933 | 2475 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
1da177e4 LT |
2476 | flagsize |= BD_FLG_TCP_UDP_SUM; |
2477 | idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); | |
2478 | ||
2479 | if (i == skb_shinfo(skb)->nr_frags - 1) { | |
2480 | flagsize |= BD_FLG_END; | |
2481 | if (tx_ring_full(ap, ap->tx_ret_csm, idx)) | |
2482 | flagsize |= BD_FLG_COAL_NOW; | |
2483 | ||
2484 | /* | |
2485 | * Only the last fragment frees | |
2486 | * the skb! | |
2487 | */ | |
2488 | info->skb = skb; | |
2489 | } else { | |
2490 | info->skb = NULL; | |
2491 | } | |
430e55b1 | 2492 | dma_unmap_addr_set(info, mapping, mapping); |
9e903e08 | 2493 | dma_unmap_len_set(info, maplen, skb_frag_size(frag)); |
1da177e4 LT |
2494 | ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag); |
2495 | } | |
2496 | } | |
2497 | ||
2498 | wmb(); | |
2499 | ap->tx_prd = idx; | |
2500 | ace_set_txprd(regs, ap, idx); | |
2501 | ||
2502 | if (flagsize & BD_FLG_COAL_NOW) { | |
2503 | netif_stop_queue(dev); | |
2504 | ||
2505 | /* | |
2506 | * A TX-descriptor producer (an IRQ) might have gotten | |
25985edc | 2507 | * between, making the ring free again. Since xmit is |
1da177e4 LT |
2508 | * serialized, this is the only situation we have to |
2509 | * re-test. | |
2510 | */ | |
2511 | if (!tx_ring_full(ap, ap->tx_ret_csm, idx)) | |
2512 | netif_wake_queue(dev); | |
2513 | } | |
2514 | ||
1da177e4 LT |
2515 | return NETDEV_TX_OK; |
2516 | ||
2517 | overflow: | |
2518 | /* | |
2519 | * This race condition is unavoidable with lock-free drivers. | |
2520 | * We wake up the queue _before_ tx_prd is advanced, so that we can | |
2521 | * enter hard_start_xmit too early, while tx ring still looks closed. | |
2522 | * This happens ~1-4 times per 100000 packets, so that we can allow | |
2523 | * to loop syncing to other CPU. Probably, we need an additional | |
2524 | * wmb() in ace_tx_intr as well. | |
2525 | * | |
2526 | * Note that this race is relieved by reserving one more entry | |
2527 | * in tx ring than it is necessary (see original non-SG driver). | |
2528 | * However, with SG we need to reserve 2*MAX_SKB_FRAGS+1, which | |
2529 | * is already overkill. | |
2530 | * | |
2531 | * Alternative is to return with 1 not throttling queue. In this | |
2532 | * case loop becomes longer, no more useful effects. | |
2533 | */ | |
2534 | if (time_before(jiffies, maxjiff)) { | |
2535 | barrier(); | |
2536 | cpu_relax(); | |
2537 | goto restart; | |
2538 | } | |
6aa20a22 | 2539 | |
1da177e4 LT |
2540 | /* The ring is stuck full. */ |
2541 | printk(KERN_WARNING "%s: Transmit ring stuck full\n", dev->name); | |
2542 | return NETDEV_TX_BUSY; | |
2543 | } | |
2544 | ||
2545 | ||
2546 | static int ace_change_mtu(struct net_device *dev, int new_mtu) | |
2547 | { | |
2548 | struct ace_private *ap = netdev_priv(dev); | |
2549 | struct ace_regs __iomem *regs = ap->regs; | |
2550 | ||
2551 | if (new_mtu > ACE_JUMBO_MTU) | |
2552 | return -EINVAL; | |
2553 | ||
2554 | writel(new_mtu + ETH_HLEN + 4, ®s->IfMtu); | |
2555 | dev->mtu = new_mtu; | |
2556 | ||
2557 | if (new_mtu > ACE_STD_MTU) { | |
2558 | if (!(ap->jumbo)) { | |
2559 | printk(KERN_INFO "%s: Enabling Jumbo frame " | |
2560 | "support\n", dev->name); | |
2561 | ap->jumbo = 1; | |
2562 | if (!test_and_set_bit(0, &ap->jumbo_refill_busy)) | |
427e21fa | 2563 | ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE); |
1da177e4 LT |
2564 | ace_set_rxtx_parms(dev, 1); |
2565 | } | |
2566 | } else { | |
2567 | while (test_and_set_bit(0, &ap->jumbo_refill_busy)); | |
2568 | ace_sync_irq(dev->irq); | |
2569 | ace_set_rxtx_parms(dev, 0); | |
2570 | if (ap->jumbo) { | |
2571 | struct cmd cmd; | |
2572 | ||
2573 | cmd.evt = C_RESET_JUMBO_RNG; | |
2574 | cmd.code = 0; | |
2575 | cmd.idx = 0; | |
2576 | ace_issue_cmd(regs, &cmd); | |
2577 | } | |
2578 | } | |
2579 | ||
2580 | return 0; | |
2581 | } | |
2582 | ||
2583 | static int ace_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) | |
2584 | { | |
2585 | struct ace_private *ap = netdev_priv(dev); | |
2586 | struct ace_regs __iomem *regs = ap->regs; | |
2587 | u32 link; | |
2588 | ||
2589 | memset(ecmd, 0, sizeof(struct ethtool_cmd)); | |
2590 | ecmd->supported = | |
2591 | (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | | |
2592 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | | |
2593 | SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full | | |
2594 | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
2595 | ||
2596 | ecmd->port = PORT_FIBRE; | |
2597 | ecmd->transceiver = XCVR_INTERNAL; | |
2598 | ||
2599 | link = readl(®s->GigLnkState); | |
2600 | if (link & LNK_1000MB) | |
70739497 | 2601 | ethtool_cmd_speed_set(ecmd, SPEED_1000); |
1da177e4 LT |
2602 | else { |
2603 | link = readl(®s->FastLnkState); | |
2604 | if (link & LNK_100MB) | |
70739497 | 2605 | ethtool_cmd_speed_set(ecmd, SPEED_100); |
1da177e4 | 2606 | else if (link & LNK_10MB) |
70739497 | 2607 | ethtool_cmd_speed_set(ecmd, SPEED_10); |
1da177e4 | 2608 | else |
70739497 | 2609 | ethtool_cmd_speed_set(ecmd, 0); |
1da177e4 LT |
2610 | } |
2611 | if (link & LNK_FULL_DUPLEX) | |
2612 | ecmd->duplex = DUPLEX_FULL; | |
2613 | else | |
2614 | ecmd->duplex = DUPLEX_HALF; | |
2615 | ||
2616 | if (link & LNK_NEGOTIATE) | |
2617 | ecmd->autoneg = AUTONEG_ENABLE; | |
2618 | else | |
2619 | ecmd->autoneg = AUTONEG_DISABLE; | |
2620 | ||
2621 | #if 0 | |
2622 | /* | |
2623 | * Current struct ethtool_cmd is insufficient | |
2624 | */ | |
2625 | ecmd->trace = readl(®s->TuneTrace); | |
2626 | ||
2627 | ecmd->txcoal = readl(®s->TuneTxCoalTicks); | |
2628 | ecmd->rxcoal = readl(®s->TuneRxCoalTicks); | |
2629 | #endif | |
2630 | ecmd->maxtxpkt = readl(®s->TuneMaxTxDesc); | |
2631 | ecmd->maxrxpkt = readl(®s->TuneMaxRxDesc); | |
2632 | ||
2633 | return 0; | |
2634 | } | |
2635 | ||
2636 | static int ace_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) | |
2637 | { | |
2638 | struct ace_private *ap = netdev_priv(dev); | |
2639 | struct ace_regs __iomem *regs = ap->regs; | |
2640 | u32 link, speed; | |
2641 | ||
2642 | link = readl(®s->GigLnkState); | |
2643 | if (link & LNK_1000MB) | |
2644 | speed = SPEED_1000; | |
2645 | else { | |
2646 | link = readl(®s->FastLnkState); | |
2647 | if (link & LNK_100MB) | |
2648 | speed = SPEED_100; | |
2649 | else if (link & LNK_10MB) | |
2650 | speed = SPEED_10; | |
2651 | else | |
2652 | speed = SPEED_100; | |
2653 | } | |
2654 | ||
2655 | link = LNK_ENABLE | LNK_1000MB | LNK_100MB | LNK_10MB | | |
2656 | LNK_RX_FLOW_CTL_Y | LNK_NEG_FCTL; | |
2657 | if (!ACE_IS_TIGON_I(ap)) | |
2658 | link |= LNK_TX_FLOW_CTL_Y; | |
2659 | if (ecmd->autoneg == AUTONEG_ENABLE) | |
2660 | link |= LNK_NEGOTIATE; | |
25db0338 | 2661 | if (ethtool_cmd_speed(ecmd) != speed) { |
1da177e4 | 2662 | link &= ~(LNK_1000MB | LNK_100MB | LNK_10MB); |
1258c076 | 2663 | switch (ethtool_cmd_speed(ecmd)) { |
1da177e4 LT |
2664 | case SPEED_1000: |
2665 | link |= LNK_1000MB; | |
2666 | break; | |
2667 | case SPEED_100: | |
2668 | link |= LNK_100MB; | |
2669 | break; | |
2670 | case SPEED_10: | |
2671 | link |= LNK_10MB; | |
2672 | break; | |
2673 | } | |
2674 | } | |
2675 | ||
2676 | if (ecmd->duplex == DUPLEX_FULL) | |
2677 | link |= LNK_FULL_DUPLEX; | |
2678 | ||
2679 | if (link != ap->link) { | |
2680 | struct cmd cmd; | |
2681 | printk(KERN_INFO "%s: Renegotiating link state\n", | |
2682 | dev->name); | |
2683 | ||
2684 | ap->link = link; | |
2685 | writel(link, ®s->TuneLink); | |
2686 | if (!ACE_IS_TIGON_I(ap)) | |
2687 | writel(link, ®s->TuneFastLink); | |
2688 | wmb(); | |
2689 | ||
2690 | cmd.evt = C_LNK_NEGOTIATION; | |
2691 | cmd.code = 0; | |
2692 | cmd.idx = 0; | |
2693 | ace_issue_cmd(regs, &cmd); | |
2694 | } | |
2695 | return 0; | |
2696 | } | |
2697 | ||
6aa20a22 | 2698 | static void ace_get_drvinfo(struct net_device *dev, |
1da177e4 LT |
2699 | struct ethtool_drvinfo *info) |
2700 | { | |
2701 | struct ace_private *ap = netdev_priv(dev); | |
2702 | ||
2703 | strlcpy(info->driver, "acenic", sizeof(info->driver)); | |
6aa20a22 | 2704 | snprintf(info->version, sizeof(info->version), "%i.%i.%i", |
949b4254 JS |
2705 | ap->firmware_major, ap->firmware_minor, |
2706 | ap->firmware_fix); | |
1da177e4 LT |
2707 | |
2708 | if (ap->pdev) | |
6aa20a22 | 2709 | strlcpy(info->bus_info, pci_name(ap->pdev), |
1da177e4 LT |
2710 | sizeof(info->bus_info)); |
2711 | ||
2712 | } | |
2713 | ||
2714 | /* | |
2715 | * Set the hardware MAC address. | |
2716 | */ | |
2717 | static int ace_set_mac_addr(struct net_device *dev, void *p) | |
2718 | { | |
2719 | struct ace_private *ap = netdev_priv(dev); | |
2720 | struct ace_regs __iomem *regs = ap->regs; | |
2721 | struct sockaddr *addr=p; | |
2722 | u8 *da; | |
2723 | struct cmd cmd; | |
2724 | ||
2725 | if(netif_running(dev)) | |
2726 | return -EBUSY; | |
2727 | ||
2728 | memcpy(dev->dev_addr, addr->sa_data,dev->addr_len); | |
2729 | ||
2730 | da = (u8 *)dev->dev_addr; | |
2731 | ||
2732 | writel(da[0] << 8 | da[1], ®s->MacAddrHi); | |
2733 | writel((da[2] << 24) | (da[3] << 16) | (da[4] << 8) | da[5], | |
2734 | ®s->MacAddrLo); | |
2735 | ||
2736 | cmd.evt = C_SET_MAC_ADDR; | |
2737 | cmd.code = 0; | |
2738 | cmd.idx = 0; | |
2739 | ace_issue_cmd(regs, &cmd); | |
2740 | ||
2741 | return 0; | |
2742 | } | |
2743 | ||
2744 | ||
2745 | static void ace_set_multicast_list(struct net_device *dev) | |
2746 | { | |
2747 | struct ace_private *ap = netdev_priv(dev); | |
2748 | struct ace_regs __iomem *regs = ap->regs; | |
2749 | struct cmd cmd; | |
2750 | ||
2751 | if ((dev->flags & IFF_ALLMULTI) && !(ap->mcast_all)) { | |
2752 | cmd.evt = C_SET_MULTICAST_MODE; | |
2753 | cmd.code = C_C_MCAST_ENABLE; | |
2754 | cmd.idx = 0; | |
2755 | ace_issue_cmd(regs, &cmd); | |
2756 | ap->mcast_all = 1; | |
2757 | } else if (ap->mcast_all) { | |
2758 | cmd.evt = C_SET_MULTICAST_MODE; | |
2759 | cmd.code = C_C_MCAST_DISABLE; | |
2760 | cmd.idx = 0; | |
2761 | ace_issue_cmd(regs, &cmd); | |
2762 | ap->mcast_all = 0; | |
2763 | } | |
2764 | ||
2765 | if ((dev->flags & IFF_PROMISC) && !(ap->promisc)) { | |
2766 | cmd.evt = C_SET_PROMISC_MODE; | |
2767 | cmd.code = C_C_PROMISC_ENABLE; | |
2768 | cmd.idx = 0; | |
2769 | ace_issue_cmd(regs, &cmd); | |
2770 | ap->promisc = 1; | |
2771 | }else if (!(dev->flags & IFF_PROMISC) && (ap->promisc)) { | |
2772 | cmd.evt = C_SET_PROMISC_MODE; | |
2773 | cmd.code = C_C_PROMISC_DISABLE; | |
2774 | cmd.idx = 0; | |
2775 | ace_issue_cmd(regs, &cmd); | |
2776 | ap->promisc = 0; | |
2777 | } | |
2778 | ||
2779 | /* | |
2780 | * For the time being multicast relies on the upper layers | |
2781 | * filtering it properly. The Firmware does not allow one to | |
2782 | * set the entire multicast list at a time and keeping track of | |
2783 | * it here is going to be messy. | |
2784 | */ | |
4cd24eaf | 2785 | if (!netdev_mc_empty(dev) && !ap->mcast_all) { |
1da177e4 LT |
2786 | cmd.evt = C_SET_MULTICAST_MODE; |
2787 | cmd.code = C_C_MCAST_ENABLE; | |
2788 | cmd.idx = 0; | |
2789 | ace_issue_cmd(regs, &cmd); | |
2790 | }else if (!ap->mcast_all) { | |
2791 | cmd.evt = C_SET_MULTICAST_MODE; | |
2792 | cmd.code = C_C_MCAST_DISABLE; | |
2793 | cmd.idx = 0; | |
2794 | ace_issue_cmd(regs, &cmd); | |
2795 | } | |
2796 | } | |
2797 | ||
2798 | ||
2799 | static struct net_device_stats *ace_get_stats(struct net_device *dev) | |
2800 | { | |
2801 | struct ace_private *ap = netdev_priv(dev); | |
2802 | struct ace_mac_stats __iomem *mac_stats = | |
2803 | (struct ace_mac_stats __iomem *)ap->regs->Stats; | |
2804 | ||
966e37bc PZ |
2805 | dev->stats.rx_missed_errors = readl(&mac_stats->drop_space); |
2806 | dev->stats.multicast = readl(&mac_stats->kept_mc); | |
2807 | dev->stats.collisions = readl(&mac_stats->coll); | |
1da177e4 | 2808 | |
966e37bc | 2809 | return &dev->stats; |
1da177e4 LT |
2810 | } |
2811 | ||
2812 | ||
083abbb7 | 2813 | static void ace_copy(struct ace_regs __iomem *regs, const __be32 *src, |
1dd06ae8 | 2814 | u32 dest, int size) |
1da177e4 LT |
2815 | { |
2816 | void __iomem *tdest; | |
1da177e4 LT |
2817 | short tsize, i; |
2818 | ||
2819 | if (size <= 0) | |
2820 | return; | |
2821 | ||
2822 | while (size > 0) { | |
2823 | tsize = min_t(u32, ((~dest & (ACE_WINDOW_SIZE - 1)) + 1), | |
2824 | min_t(u32, size, ACE_WINDOW_SIZE)); | |
6aa20a22 | 2825 | tdest = (void __iomem *) ®s->Window + |
1da177e4 LT |
2826 | (dest & (ACE_WINDOW_SIZE - 1)); |
2827 | writel(dest & ~(ACE_WINDOW_SIZE - 1), ®s->WinBase); | |
1da177e4 | 2828 | for (i = 0; i < (tsize / 4); i++) { |
949b4254 JS |
2829 | /* Firmware is big-endian */ |
2830 | writel(be32_to_cpup(src), tdest); | |
2831 | src++; | |
2832 | tdest += 4; | |
2833 | dest += 4; | |
2834 | size -= 4; | |
1da177e4 | 2835 | } |
1da177e4 | 2836 | } |
1da177e4 LT |
2837 | } |
2838 | ||
2839 | ||
083abbb7 | 2840 | static void ace_clear(struct ace_regs __iomem *regs, u32 dest, int size) |
1da177e4 LT |
2841 | { |
2842 | void __iomem *tdest; | |
2843 | short tsize = 0, i; | |
2844 | ||
2845 | if (size <= 0) | |
2846 | return; | |
2847 | ||
2848 | while (size > 0) { | |
2849 | tsize = min_t(u32, ((~dest & (ACE_WINDOW_SIZE - 1)) + 1), | |
2850 | min_t(u32, size, ACE_WINDOW_SIZE)); | |
6aa20a22 | 2851 | tdest = (void __iomem *) ®s->Window + |
1da177e4 LT |
2852 | (dest & (ACE_WINDOW_SIZE - 1)); |
2853 | writel(dest & ~(ACE_WINDOW_SIZE - 1), ®s->WinBase); | |
2854 | ||
2855 | for (i = 0; i < (tsize / 4); i++) { | |
2856 | writel(0, tdest + i*4); | |
2857 | } | |
2858 | ||
2859 | dest += tsize; | |
2860 | size -= tsize; | |
2861 | } | |
1da177e4 LT |
2862 | } |
2863 | ||
2864 | ||
2865 | /* | |
2866 | * Download the firmware into the SRAM on the NIC | |
2867 | * | |
2868 | * This operation requires the NIC to be halted and is performed with | |
2869 | * interrupts disabled and with the spinlock hold. | |
2870 | */ | |
083abbb7 | 2871 | static int ace_load_firmware(struct net_device *dev) |
1da177e4 | 2872 | { |
949b4254 JS |
2873 | const struct firmware *fw; |
2874 | const char *fw_name = "acenic/tg2.bin"; | |
1da177e4 LT |
2875 | struct ace_private *ap = netdev_priv(dev); |
2876 | struct ace_regs __iomem *regs = ap->regs; | |
949b4254 JS |
2877 | const __be32 *fw_data; |
2878 | u32 load_addr; | |
2879 | int ret; | |
1da177e4 LT |
2880 | |
2881 | if (!(readl(®s->CpuCtrl) & CPU_HALTED)) { | |
2882 | printk(KERN_ERR "%s: trying to download firmware while the " | |
2883 | "CPU is running!\n", ap->name); | |
2884 | return -EFAULT; | |
2885 | } | |
2886 | ||
949b4254 JS |
2887 | if (ACE_IS_TIGON_I(ap)) |
2888 | fw_name = "acenic/tg1.bin"; | |
2889 | ||
2890 | ret = request_firmware(&fw, fw_name, &ap->pdev->dev); | |
2891 | if (ret) { | |
2892 | printk(KERN_ERR "%s: Failed to load firmware \"%s\"\n", | |
2893 | ap->name, fw_name); | |
2894 | return ret; | |
2895 | } | |
2896 | ||
2897 | fw_data = (void *)fw->data; | |
2898 | ||
2899 | /* Firmware blob starts with version numbers, followed by | |
2900 | load and start address. Remainder is the blob to be loaded | |
2901 | contiguously from load address. We don't bother to represent | |
2902 | the BSS/SBSS sections any more, since we were clearing the | |
2903 | whole thing anyway. */ | |
2904 | ap->firmware_major = fw->data[0]; | |
2905 | ap->firmware_minor = fw->data[1]; | |
2906 | ap->firmware_fix = fw->data[2]; | |
2907 | ||
2908 | ap->firmware_start = be32_to_cpu(fw_data[1]); | |
2909 | if (ap->firmware_start < 0x4000 || ap->firmware_start >= 0x80000) { | |
2910 | printk(KERN_ERR "%s: bogus load address %08x in \"%s\"\n", | |
2911 | ap->name, ap->firmware_start, fw_name); | |
2912 | ret = -EINVAL; | |
2913 | goto out; | |
2914 | } | |
2915 | ||
2916 | load_addr = be32_to_cpu(fw_data[2]); | |
2917 | if (load_addr < 0x4000 || load_addr >= 0x80000) { | |
2918 | printk(KERN_ERR "%s: bogus load address %08x in \"%s\"\n", | |
2919 | ap->name, load_addr, fw_name); | |
2920 | ret = -EINVAL; | |
2921 | goto out; | |
2922 | } | |
2923 | ||
1da177e4 | 2924 | /* |
949b4254 JS |
2925 | * Do not try to clear more than 512KiB or we end up seeing |
2926 | * funny things on NICs with only 512KiB SRAM | |
1da177e4 LT |
2927 | */ |
2928 | ace_clear(regs, 0x2000, 0x80000-0x2000); | |
949b4254 JS |
2929 | ace_copy(regs, &fw_data[3], load_addr, fw->size-12); |
2930 | out: | |
2931 | release_firmware(fw); | |
2932 | return ret; | |
1da177e4 LT |
2933 | } |
2934 | ||
2935 | ||
2936 | /* | |
2937 | * The eeprom on the AceNIC is an Atmel i2c EEPROM. | |
2938 | * | |
2939 | * Accessing the EEPROM is `interesting' to say the least - don't read | |
2940 | * this code right after dinner. | |
2941 | * | |
2942 | * This is all about black magic and bit-banging the device .... I | |
2943 | * wonder in what hospital they have put the guy who designed the i2c | |
2944 | * specs. | |
2945 | * | |
2946 | * Oh yes, this is only the beginning! | |
2947 | * | |
2948 | * Thanks to Stevarino Webinski for helping tracking down the bugs in the | |
2949 | * code i2c readout code by beta testing all my hacks. | |
2950 | */ | |
083abbb7 | 2951 | static void eeprom_start(struct ace_regs __iomem *regs) |
1da177e4 LT |
2952 | { |
2953 | u32 local; | |
2954 | ||
2955 | readl(®s->LocalCtrl); | |
2956 | udelay(ACE_SHORT_DELAY); | |
2957 | local = readl(®s->LocalCtrl); | |
2958 | local |= EEPROM_DATA_OUT | EEPROM_WRITE_ENABLE; | |
2959 | writel(local, ®s->LocalCtrl); | |
2960 | readl(®s->LocalCtrl); | |
2961 | mb(); | |
2962 | udelay(ACE_SHORT_DELAY); | |
2963 | local |= EEPROM_CLK_OUT; | |
2964 | writel(local, ®s->LocalCtrl); | |
2965 | readl(®s->LocalCtrl); | |
2966 | mb(); | |
2967 | udelay(ACE_SHORT_DELAY); | |
2968 | local &= ~EEPROM_DATA_OUT; | |
2969 | writel(local, ®s->LocalCtrl); | |
2970 | readl(®s->LocalCtrl); | |
2971 | mb(); | |
2972 | udelay(ACE_SHORT_DELAY); | |
2973 | local &= ~EEPROM_CLK_OUT; | |
2974 | writel(local, ®s->LocalCtrl); | |
2975 | readl(®s->LocalCtrl); | |
2976 | mb(); | |
2977 | } | |
2978 | ||
2979 | ||
083abbb7 | 2980 | static void eeprom_prep(struct ace_regs __iomem *regs, u8 magic) |
1da177e4 LT |
2981 | { |
2982 | short i; | |
2983 | u32 local; | |
2984 | ||
2985 | udelay(ACE_SHORT_DELAY); | |
2986 | local = readl(®s->LocalCtrl); | |
2987 | local &= ~EEPROM_DATA_OUT; | |
2988 | local |= EEPROM_WRITE_ENABLE; | |
2989 | writel(local, ®s->LocalCtrl); | |
2990 | readl(®s->LocalCtrl); | |
2991 | mb(); | |
2992 | ||
2993 | for (i = 0; i < 8; i++, magic <<= 1) { | |
2994 | udelay(ACE_SHORT_DELAY); | |
6aa20a22 | 2995 | if (magic & 0x80) |
1da177e4 LT |
2996 | local |= EEPROM_DATA_OUT; |
2997 | else | |
2998 | local &= ~EEPROM_DATA_OUT; | |
2999 | writel(local, ®s->LocalCtrl); | |
3000 | readl(®s->LocalCtrl); | |
3001 | mb(); | |
3002 | ||
3003 | udelay(ACE_SHORT_DELAY); | |
3004 | local |= EEPROM_CLK_OUT; | |
3005 | writel(local, ®s->LocalCtrl); | |
3006 | readl(®s->LocalCtrl); | |
3007 | mb(); | |
3008 | udelay(ACE_SHORT_DELAY); | |
3009 | local &= ~(EEPROM_CLK_OUT | EEPROM_DATA_OUT); | |
3010 | writel(local, ®s->LocalCtrl); | |
3011 | readl(®s->LocalCtrl); | |
3012 | mb(); | |
3013 | } | |
3014 | } | |
3015 | ||
3016 | ||
083abbb7 | 3017 | static int eeprom_check_ack(struct ace_regs __iomem *regs) |
1da177e4 LT |
3018 | { |
3019 | int state; | |
3020 | u32 local; | |
3021 | ||
3022 | local = readl(®s->LocalCtrl); | |
3023 | local &= ~EEPROM_WRITE_ENABLE; | |
3024 | writel(local, ®s->LocalCtrl); | |
3025 | readl(®s->LocalCtrl); | |
3026 | mb(); | |
3027 | udelay(ACE_LONG_DELAY); | |
3028 | local |= EEPROM_CLK_OUT; | |
3029 | writel(local, ®s->LocalCtrl); | |
3030 | readl(®s->LocalCtrl); | |
3031 | mb(); | |
3032 | udelay(ACE_SHORT_DELAY); | |
3033 | /* sample data in middle of high clk */ | |
3034 | state = (readl(®s->LocalCtrl) & EEPROM_DATA_IN) != 0; | |
3035 | udelay(ACE_SHORT_DELAY); | |
3036 | mb(); | |
3037 | writel(readl(®s->LocalCtrl) & ~EEPROM_CLK_OUT, ®s->LocalCtrl); | |
3038 | readl(®s->LocalCtrl); | |
3039 | mb(); | |
3040 | ||
3041 | return state; | |
3042 | } | |
3043 | ||
3044 | ||
083abbb7 | 3045 | static void eeprom_stop(struct ace_regs __iomem *regs) |
1da177e4 LT |
3046 | { |
3047 | u32 local; | |
3048 | ||
3049 | udelay(ACE_SHORT_DELAY); | |
3050 | local = readl(®s->LocalCtrl); | |
3051 | local |= EEPROM_WRITE_ENABLE; | |
3052 | writel(local, ®s->LocalCtrl); | |
3053 | readl(®s->LocalCtrl); | |
3054 | mb(); | |
3055 | udelay(ACE_SHORT_DELAY); | |
3056 | local &= ~EEPROM_DATA_OUT; | |
3057 | writel(local, ®s->LocalCtrl); | |
3058 | readl(®s->LocalCtrl); | |
3059 | mb(); | |
3060 | udelay(ACE_SHORT_DELAY); | |
3061 | local |= EEPROM_CLK_OUT; | |
3062 | writel(local, ®s->LocalCtrl); | |
3063 | readl(®s->LocalCtrl); | |
3064 | mb(); | |
3065 | udelay(ACE_SHORT_DELAY); | |
3066 | local |= EEPROM_DATA_OUT; | |
3067 | writel(local, ®s->LocalCtrl); | |
3068 | readl(®s->LocalCtrl); | |
3069 | mb(); | |
3070 | udelay(ACE_LONG_DELAY); | |
3071 | local &= ~EEPROM_CLK_OUT; | |
3072 | writel(local, ®s->LocalCtrl); | |
3073 | mb(); | |
3074 | } | |
3075 | ||
3076 | ||
3077 | /* | |
3078 | * Read a whole byte from the EEPROM. | |
3079 | */ | |
1dd06ae8 | 3080 | static int read_eeprom_byte(struct net_device *dev, unsigned long offset) |
1da177e4 LT |
3081 | { |
3082 | struct ace_private *ap = netdev_priv(dev); | |
3083 | struct ace_regs __iomem *regs = ap->regs; | |
3084 | unsigned long flags; | |
3085 | u32 local; | |
3086 | int result = 0; | |
3087 | short i; | |
3088 | ||
1da177e4 LT |
3089 | /* |
3090 | * Don't take interrupts on this CPU will bit banging | |
3091 | * the %#%#@$ I2C device | |
3092 | */ | |
3093 | local_irq_save(flags); | |
3094 | ||
3095 | eeprom_start(regs); | |
3096 | ||
3097 | eeprom_prep(regs, EEPROM_WRITE_SELECT); | |
3098 | if (eeprom_check_ack(regs)) { | |
3099 | local_irq_restore(flags); | |
3100 | printk(KERN_ERR "%s: Unable to sync eeprom\n", ap->name); | |
3101 | result = -EIO; | |
3102 | goto eeprom_read_error; | |
3103 | } | |
3104 | ||
3105 | eeprom_prep(regs, (offset >> 8) & 0xff); | |
3106 | if (eeprom_check_ack(regs)) { | |
3107 | local_irq_restore(flags); | |
3108 | printk(KERN_ERR "%s: Unable to set address byte 0\n", | |
3109 | ap->name); | |
3110 | result = -EIO; | |
3111 | goto eeprom_read_error; | |
3112 | } | |
3113 | ||
3114 | eeprom_prep(regs, offset & 0xff); | |
3115 | if (eeprom_check_ack(regs)) { | |
3116 | local_irq_restore(flags); | |
3117 | printk(KERN_ERR "%s: Unable to set address byte 1\n", | |
3118 | ap->name); | |
3119 | result = -EIO; | |
3120 | goto eeprom_read_error; | |
3121 | } | |
3122 | ||
3123 | eeprom_start(regs); | |
3124 | eeprom_prep(regs, EEPROM_READ_SELECT); | |
3125 | if (eeprom_check_ack(regs)) { | |
3126 | local_irq_restore(flags); | |
3127 | printk(KERN_ERR "%s: Unable to set READ_SELECT\n", | |
3128 | ap->name); | |
3129 | result = -EIO; | |
3130 | goto eeprom_read_error; | |
3131 | } | |
3132 | ||
3133 | for (i = 0; i < 8; i++) { | |
3134 | local = readl(®s->LocalCtrl); | |
3135 | local &= ~EEPROM_WRITE_ENABLE; | |
3136 | writel(local, ®s->LocalCtrl); | |
3137 | readl(®s->LocalCtrl); | |
3138 | udelay(ACE_LONG_DELAY); | |
3139 | mb(); | |
3140 | local |= EEPROM_CLK_OUT; | |
3141 | writel(local, ®s->LocalCtrl); | |
3142 | readl(®s->LocalCtrl); | |
3143 | mb(); | |
3144 | udelay(ACE_SHORT_DELAY); | |
3145 | /* sample data mid high clk */ | |
3146 | result = (result << 1) | | |
3147 | ((readl(®s->LocalCtrl) & EEPROM_DATA_IN) != 0); | |
3148 | udelay(ACE_SHORT_DELAY); | |
3149 | mb(); | |
3150 | local = readl(®s->LocalCtrl); | |
3151 | local &= ~EEPROM_CLK_OUT; | |
3152 | writel(local, ®s->LocalCtrl); | |
3153 | readl(®s->LocalCtrl); | |
3154 | udelay(ACE_SHORT_DELAY); | |
3155 | mb(); | |
3156 | if (i == 7) { | |
3157 | local |= EEPROM_WRITE_ENABLE; | |
3158 | writel(local, ®s->LocalCtrl); | |
3159 | readl(®s->LocalCtrl); | |
3160 | mb(); | |
3161 | udelay(ACE_SHORT_DELAY); | |
3162 | } | |
3163 | } | |
3164 | ||
3165 | local |= EEPROM_DATA_OUT; | |
3166 | writel(local, ®s->LocalCtrl); | |
3167 | readl(®s->LocalCtrl); | |
3168 | mb(); | |
3169 | udelay(ACE_SHORT_DELAY); | |
3170 | writel(readl(®s->LocalCtrl) | EEPROM_CLK_OUT, ®s->LocalCtrl); | |
3171 | readl(®s->LocalCtrl); | |
3172 | udelay(ACE_LONG_DELAY); | |
3173 | writel(readl(®s->LocalCtrl) & ~EEPROM_CLK_OUT, ®s->LocalCtrl); | |
3174 | readl(®s->LocalCtrl); | |
3175 | mb(); | |
3176 | udelay(ACE_SHORT_DELAY); | |
3177 | eeprom_stop(regs); | |
3178 | ||
3179 | local_irq_restore(flags); | |
3180 | out: | |
3181 | return result; | |
3182 | ||
3183 | eeprom_read_error: | |
3184 | printk(KERN_ERR "%s: Unable to read eeprom byte 0x%02lx\n", | |
3185 | ap->name, offset); | |
3186 | goto out; | |
3187 | } | |
e6d20fca PH |
3188 | |
3189 | module_pci_driver(acenic_pci_driver); |