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1da177e4 LT |
1 | /* |
2 | * AGPGART driver. | |
3 | * Copyright (C) 2004 Silicon Graphics, Inc. | |
4 | * Copyright (C) 2002-2005 Dave Jones. | |
5 | * Copyright (C) 1999 Jeff Hartmann. | |
6 | * Copyright (C) 1999 Precision Insight, Inc. | |
7 | * Copyright (C) 1999 Xi Graphics, Inc. | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a | |
10 | * copy of this software and associated documentation files (the "Software"), | |
11 | * to deal in the Software without restriction, including without limitation | |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
13 | * and/or sell copies of the Software, and to permit persons to whom the | |
14 | * Software is furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included | |
17 | * in all copies or substantial portions of the Software. | |
18 | * | |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
22 | * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, | |
23 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
24 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE | |
25 | * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
26 | * | |
27 | * TODO: | |
28 | * - Allocate more than order 0 pages to avoid too much linear map splitting. | |
29 | */ | |
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/pci.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/pagemap.h> | |
34 | #include <linux/miscdevice.h> | |
35 | #include <linux/pm.h> | |
36 | #include <linux/agp_backend.h> | |
37 | #include <linux/vmalloc.h> | |
38 | #include <linux/dma-mapping.h> | |
39 | #include <linux/mm.h> | |
e8edc6e0 | 40 | #include <linux/sched.h> |
1da177e4 LT |
41 | #include <asm/io.h> |
42 | #include <asm/cacheflush.h> | |
43 | #include <asm/pgtable.h> | |
44 | #include "agp.h" | |
45 | ||
46 | __u32 *agp_gatt_table; | |
47 | int agp_memory_reserved; | |
48 | ||
49 | /* | |
50 | * Needed by the Nforce GART driver for the time being. Would be | |
51 | * nice to do this some other way instead of needing this export. | |
52 | */ | |
53 | EXPORT_SYMBOL_GPL(agp_memory_reserved); | |
54 | ||
1da177e4 LT |
55 | /* |
56 | * Generic routines for handling agp_memory structures - | |
57 | * They use the basic page allocation routines to do the brunt of the work. | |
58 | */ | |
59 | ||
60 | void agp_free_key(int key) | |
61 | { | |
62 | if (key < 0) | |
63 | return; | |
64 | ||
65 | if (key < MAXKEY) | |
66 | clear_bit(key, agp_bridge->key_list); | |
67 | } | |
68 | EXPORT_SYMBOL(agp_free_key); | |
69 | ||
70 | ||
71 | static int agp_get_key(void) | |
72 | { | |
73 | int bit; | |
74 | ||
75 | bit = find_first_zero_bit(agp_bridge->key_list, MAXKEY); | |
76 | if (bit < MAXKEY) { | |
77 | set_bit(bit, agp_bridge->key_list); | |
78 | return bit; | |
79 | } | |
80 | return -1; | |
81 | } | |
82 | ||
a13af4b4 DA |
83 | void agp_flush_chipset(struct agp_bridge_data *bridge) |
84 | { | |
85 | if (bridge->driver->chipset_flush) | |
86 | bridge->driver->chipset_flush(bridge); | |
87 | } | |
88 | EXPORT_SYMBOL(agp_flush_chipset); | |
89 | ||
a030ce44 TH |
90 | /* |
91 | * Use kmalloc if possible for the page list. Otherwise fall back to | |
92 | * vmalloc. This speeds things up and also saves memory for small AGP | |
93 | * regions. | |
94 | */ | |
95 | ||
96 | void agp_alloc_page_array(size_t size, struct agp_memory *mem) | |
97 | { | |
07613ba2 | 98 | mem->pages = NULL; |
9516b030 | 99 | mem->vmalloc_flag = false; |
a030ce44 | 100 | |
1c14cfbb | 101 | if (size <= 2*PAGE_SIZE) |
07613ba2 DA |
102 | mem->pages = kmalloc(size, GFP_KERNEL | __GFP_NORETRY); |
103 | if (mem->pages == NULL) { | |
104 | mem->pages = vmalloc(size); | |
9516b030 | 105 | mem->vmalloc_flag = true; |
a030ce44 TH |
106 | } |
107 | } | |
108 | EXPORT_SYMBOL(agp_alloc_page_array); | |
109 | ||
110 | void agp_free_page_array(struct agp_memory *mem) | |
111 | { | |
112 | if (mem->vmalloc_flag) { | |
07613ba2 | 113 | vfree(mem->pages); |
a030ce44 | 114 | } else { |
07613ba2 | 115 | kfree(mem->pages); |
a030ce44 TH |
116 | } |
117 | } | |
118 | EXPORT_SYMBOL(agp_free_page_array); | |
119 | ||
120 | ||
121 | static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages) | |
122 | { | |
123 | struct agp_memory *new; | |
124 | unsigned long alloc_size = num_agp_pages*sizeof(struct page *); | |
125 | ||
1c14cfbb | 126 | new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
a030ce44 TH |
127 | if (new == NULL) |
128 | return NULL; | |
129 | ||
a030ce44 TH |
130 | new->key = agp_get_key(); |
131 | ||
132 | if (new->key < 0) { | |
133 | kfree(new); | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | agp_alloc_page_array(alloc_size, new); | |
138 | ||
07613ba2 | 139 | if (new->pages == NULL) { |
a030ce44 TH |
140 | agp_free_key(new->key); |
141 | kfree(new); | |
142 | return NULL; | |
143 | } | |
144 | new->num_scratch_pages = 0; | |
145 | return new; | |
146 | } | |
147 | ||
1da177e4 LT |
148 | struct agp_memory *agp_create_memory(int scratch_pages) |
149 | { | |
150 | struct agp_memory *new; | |
151 | ||
0ea27d9f | 152 | new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
1da177e4 LT |
153 | if (new == NULL) |
154 | return NULL; | |
155 | ||
1da177e4 LT |
156 | new->key = agp_get_key(); |
157 | ||
158 | if (new->key < 0) { | |
159 | kfree(new); | |
160 | return NULL; | |
161 | } | |
a030ce44 TH |
162 | |
163 | agp_alloc_page_array(PAGE_SIZE * scratch_pages, new); | |
1da177e4 | 164 | |
07613ba2 | 165 | if (new->pages == NULL) { |
1da177e4 LT |
166 | agp_free_key(new->key); |
167 | kfree(new); | |
168 | return NULL; | |
169 | } | |
170 | new->num_scratch_pages = scratch_pages; | |
a030ce44 | 171 | new->type = AGP_NORMAL_MEMORY; |
1da177e4 LT |
172 | return new; |
173 | } | |
174 | EXPORT_SYMBOL(agp_create_memory); | |
175 | ||
176 | /** | |
177 | * agp_free_memory - free memory associated with an agp_memory pointer. | |
178 | * | |
179 | * @curr: agp_memory pointer to be freed. | |
180 | * | |
181 | * It is the only function that can be called when the backend is not owned | |
182 | * by the caller. (So it can free memory on client death.) | |
183 | */ | |
184 | void agp_free_memory(struct agp_memory *curr) | |
185 | { | |
186 | size_t i; | |
187 | ||
188 | if (curr == NULL) | |
189 | return; | |
190 | ||
c7258012 | 191 | if (curr->is_bound) |
1da177e4 LT |
192 | agp_unbind_memory(curr); |
193 | ||
a030ce44 TH |
194 | if (curr->type >= AGP_USER_TYPES) { |
195 | agp_generic_free_by_type(curr); | |
196 | return; | |
197 | } | |
198 | ||
1da177e4 LT |
199 | if (curr->type != 0) { |
200 | curr->bridge->driver->free_by_type(curr); | |
201 | return; | |
202 | } | |
203 | if (curr->page_count != 0) { | |
bd07928c SL |
204 | if (curr->bridge->driver->agp_destroy_pages) { |
205 | curr->bridge->driver->agp_destroy_pages(curr); | |
206 | } else { | |
207 | ||
208 | for (i = 0; i < curr->page_count; i++) { | |
bd07928c | 209 | curr->bridge->driver->agp_destroy_page( |
07613ba2 | 210 | curr->pages[i], |
bd07928c SL |
211 | AGP_PAGE_DESTROY_UNMAP); |
212 | } | |
213 | for (i = 0; i < curr->page_count; i++) { | |
214 | curr->bridge->driver->agp_destroy_page( | |
07613ba2 | 215 | curr->pages[i], |
bd07928c SL |
216 | AGP_PAGE_DESTROY_FREE); |
217 | } | |
a2721e99 | 218 | } |
1da177e4 LT |
219 | } |
220 | agp_free_key(curr->key); | |
a030ce44 | 221 | agp_free_page_array(curr); |
1da177e4 LT |
222 | kfree(curr); |
223 | } | |
224 | EXPORT_SYMBOL(agp_free_memory); | |
225 | ||
226 | #define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long)) | |
227 | ||
228 | /** | |
229 | * agp_allocate_memory - allocate a group of pages of a certain type. | |
230 | * | |
231 | * @page_count: size_t argument of the number of pages | |
232 | * @type: u32 argument of the type of memory to be allocated. | |
233 | * | |
234 | * Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which | |
235 | * maps to physical ram. Any other type is device dependent. | |
236 | * | |
237 | * It returns NULL whenever memory is unavailable. | |
238 | */ | |
239 | struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge, | |
240 | size_t page_count, u32 type) | |
241 | { | |
242 | int scratch_pages; | |
243 | struct agp_memory *new; | |
244 | size_t i; | |
245 | ||
246 | if (!bridge) | |
247 | return NULL; | |
248 | ||
249 | if ((atomic_read(&bridge->current_memory_agp) + page_count) > bridge->max_memory_agp) | |
250 | return NULL; | |
251 | ||
a030ce44 TH |
252 | if (type >= AGP_USER_TYPES) { |
253 | new = agp_generic_alloc_user(page_count, type); | |
254 | if (new) | |
255 | new->bridge = bridge; | |
256 | return new; | |
257 | } | |
258 | ||
1da177e4 LT |
259 | if (type != 0) { |
260 | new = bridge->driver->alloc_by_type(page_count, type); | |
261 | if (new) | |
262 | new->bridge = bridge; | |
263 | return new; | |
264 | } | |
265 | ||
266 | scratch_pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; | |
267 | ||
268 | new = agp_create_memory(scratch_pages); | |
269 | ||
270 | if (new == NULL) | |
271 | return NULL; | |
272 | ||
37acee10 SL |
273 | if (bridge->driver->agp_alloc_pages) { |
274 | if (bridge->driver->agp_alloc_pages(bridge, new, page_count)) { | |
275 | agp_free_memory(new); | |
276 | return NULL; | |
277 | } | |
278 | new->bridge = bridge; | |
279 | return new; | |
280 | } | |
281 | ||
1da177e4 | 282 | for (i = 0; i < page_count; i++) { |
07613ba2 | 283 | struct page *page = bridge->driver->agp_alloc_page(bridge); |
1da177e4 | 284 | |
07613ba2 | 285 | if (page == NULL) { |
1da177e4 LT |
286 | agp_free_memory(new); |
287 | return NULL; | |
288 | } | |
07613ba2 | 289 | new->pages[i] = page; |
1da177e4 LT |
290 | new->page_count++; |
291 | } | |
88d51967 | 292 | new->bridge = bridge; |
1da177e4 | 293 | |
1da177e4 LT |
294 | return new; |
295 | } | |
296 | EXPORT_SYMBOL(agp_allocate_memory); | |
297 | ||
298 | ||
299 | /* End - Generic routines for handling agp_memory structures */ | |
300 | ||
301 | ||
302 | static int agp_return_size(void) | |
303 | { | |
304 | int current_size; | |
305 | void *temp; | |
306 | ||
307 | temp = agp_bridge->current_size; | |
308 | ||
309 | switch (agp_bridge->driver->size_type) { | |
310 | case U8_APER_SIZE: | |
311 | current_size = A_SIZE_8(temp)->size; | |
312 | break; | |
313 | case U16_APER_SIZE: | |
314 | current_size = A_SIZE_16(temp)->size; | |
315 | break; | |
316 | case U32_APER_SIZE: | |
317 | current_size = A_SIZE_32(temp)->size; | |
318 | break; | |
319 | case LVL2_APER_SIZE: | |
320 | current_size = A_SIZE_LVL2(temp)->size; | |
321 | break; | |
322 | case FIXED_APER_SIZE: | |
323 | current_size = A_SIZE_FIX(temp)->size; | |
324 | break; | |
325 | default: | |
326 | current_size = 0; | |
327 | break; | |
328 | } | |
329 | ||
330 | current_size -= (agp_memory_reserved / (1024*1024)); | |
331 | if (current_size <0) | |
332 | current_size = 0; | |
333 | return current_size; | |
334 | } | |
335 | ||
336 | ||
337 | int agp_num_entries(void) | |
338 | { | |
339 | int num_entries; | |
340 | void *temp; | |
341 | ||
342 | temp = agp_bridge->current_size; | |
343 | ||
344 | switch (agp_bridge->driver->size_type) { | |
345 | case U8_APER_SIZE: | |
346 | num_entries = A_SIZE_8(temp)->num_entries; | |
347 | break; | |
348 | case U16_APER_SIZE: | |
349 | num_entries = A_SIZE_16(temp)->num_entries; | |
350 | break; | |
351 | case U32_APER_SIZE: | |
352 | num_entries = A_SIZE_32(temp)->num_entries; | |
353 | break; | |
354 | case LVL2_APER_SIZE: | |
355 | num_entries = A_SIZE_LVL2(temp)->num_entries; | |
356 | break; | |
357 | case FIXED_APER_SIZE: | |
358 | num_entries = A_SIZE_FIX(temp)->num_entries; | |
359 | break; | |
360 | default: | |
361 | num_entries = 0; | |
362 | break; | |
363 | } | |
364 | ||
365 | num_entries -= agp_memory_reserved>>PAGE_SHIFT; | |
366 | if (num_entries<0) | |
367 | num_entries = 0; | |
368 | return num_entries; | |
369 | } | |
370 | EXPORT_SYMBOL_GPL(agp_num_entries); | |
371 | ||
372 | ||
1da177e4 LT |
373 | /** |
374 | * agp_copy_info - copy bridge state information | |
375 | * | |
6a92a4e0 | 376 | * @info: agp_kern_info pointer. The caller should insure that this pointer is valid. |
1da177e4 LT |
377 | * |
378 | * This function copies information about the agp bridge device and the state of | |
379 | * the agp backend into an agp_kern_info pointer. | |
380 | */ | |
381 | int agp_copy_info(struct agp_bridge_data *bridge, struct agp_kern_info *info) | |
382 | { | |
383 | memset(info, 0, sizeof(struct agp_kern_info)); | |
384 | if (!bridge) { | |
385 | info->chipset = NOT_SUPPORTED; | |
386 | return -EIO; | |
387 | } | |
388 | ||
389 | info->version.major = bridge->version->major; | |
390 | info->version.minor = bridge->version->minor; | |
391 | info->chipset = SUPPORTED; | |
392 | info->device = bridge->dev; | |
66bb8bf8 | 393 | if (bridge->mode & AGPSTAT_MODE_3_0) |
1da177e4 LT |
394 | info->mode = bridge->mode & ~AGP3_RESERVED_MASK; |
395 | else | |
396 | info->mode = bridge->mode & ~AGP2_RESERVED_MASK; | |
1da177e4 LT |
397 | info->aper_base = bridge->gart_bus_addr; |
398 | info->aper_size = agp_return_size(); | |
399 | info->max_memory = bridge->max_memory_agp; | |
400 | info->current_memory = atomic_read(&bridge->current_memory_agp); | |
401 | info->cant_use_aperture = bridge->driver->cant_use_aperture; | |
402 | info->vm_ops = bridge->vm_ops; | |
403 | info->page_mask = ~0UL; | |
404 | return 0; | |
405 | } | |
406 | EXPORT_SYMBOL(agp_copy_info); | |
407 | ||
408 | /* End - Routine to copy over information structure */ | |
409 | ||
410 | /* | |
411 | * Routines for handling swapping of agp_memory into the GATT - | |
412 | * These routines take agp_memory and insert them into the GATT. | |
413 | * They call device specific routines to actually write to the GATT. | |
414 | */ | |
415 | ||
416 | /** | |
417 | * agp_bind_memory - Bind an agp_memory structure into the GATT. | |
418 | * | |
419 | * @curr: agp_memory pointer | |
420 | * @pg_start: an offset into the graphics aperture translation table | |
421 | * | |
422 | * It returns -EINVAL if the pointer == NULL. | |
423 | * It returns -EBUSY if the area of the table requested is already in use. | |
424 | */ | |
425 | int agp_bind_memory(struct agp_memory *curr, off_t pg_start) | |
426 | { | |
427 | int ret_val; | |
428 | ||
429 | if (curr == NULL) | |
430 | return -EINVAL; | |
431 | ||
c7258012 | 432 | if (curr->is_bound) { |
8c8b8385 | 433 | printk(KERN_INFO PFX "memory %p is already bound!\n", curr); |
1da177e4 LT |
434 | return -EINVAL; |
435 | } | |
c7258012 | 436 | if (!curr->is_flushed) { |
1da177e4 | 437 | curr->bridge->driver->cache_flush(); |
c7258012 | 438 | curr->is_flushed = true; |
1da177e4 | 439 | } |
ff663cf8 ZW |
440 | |
441 | if (curr->bridge->driver->agp_map_memory) { | |
442 | ret_val = curr->bridge->driver->agp_map_memory(curr); | |
443 | if (ret_val) | |
444 | return ret_val; | |
445 | } | |
1da177e4 LT |
446 | ret_val = curr->bridge->driver->insert_memory(curr, pg_start, curr->type); |
447 | ||
448 | if (ret_val != 0) | |
449 | return ret_val; | |
450 | ||
c7258012 | 451 | curr->is_bound = true; |
1da177e4 | 452 | curr->pg_start = pg_start; |
a8c84df9 KP |
453 | spin_lock(&agp_bridge->mapped_lock); |
454 | list_add(&curr->mapped_list, &agp_bridge->mapped_list); | |
455 | spin_unlock(&agp_bridge->mapped_lock); | |
456 | ||
1da177e4 LT |
457 | return 0; |
458 | } | |
459 | EXPORT_SYMBOL(agp_bind_memory); | |
460 | ||
461 | ||
462 | /** | |
463 | * agp_unbind_memory - Removes an agp_memory structure from the GATT | |
464 | * | |
465 | * @curr: agp_memory pointer to be removed from the GATT. | |
466 | * | |
467 | * It returns -EINVAL if this piece of agp_memory is not currently bound to | |
468 | * the graphics aperture translation table or if the agp_memory pointer == NULL | |
469 | */ | |
470 | int agp_unbind_memory(struct agp_memory *curr) | |
471 | { | |
472 | int ret_val; | |
473 | ||
474 | if (curr == NULL) | |
475 | return -EINVAL; | |
476 | ||
c7258012 | 477 | if (!curr->is_bound) { |
8c8b8385 | 478 | printk(KERN_INFO PFX "memory %p was not bound!\n", curr); |
1da177e4 LT |
479 | return -EINVAL; |
480 | } | |
481 | ||
482 | ret_val = curr->bridge->driver->remove_memory(curr, curr->pg_start, curr->type); | |
483 | ||
484 | if (ret_val != 0) | |
485 | return ret_val; | |
486 | ||
ff663cf8 ZW |
487 | if (curr->bridge->driver->agp_unmap_memory) |
488 | curr->bridge->driver->agp_unmap_memory(curr); | |
489 | ||
c7258012 | 490 | curr->is_bound = false; |
1da177e4 | 491 | curr->pg_start = 0; |
a8c84df9 KP |
492 | spin_lock(&curr->bridge->mapped_lock); |
493 | list_del(&curr->mapped_list); | |
494 | spin_unlock(&curr->bridge->mapped_lock); | |
1da177e4 LT |
495 | return 0; |
496 | } | |
497 | EXPORT_SYMBOL(agp_unbind_memory); | |
498 | ||
a8c84df9 KP |
499 | /** |
500 | * agp_rebind_emmory - Rewrite the entire GATT, useful on resume | |
501 | */ | |
502 | int agp_rebind_memory(void) | |
503 | { | |
504 | struct agp_memory *curr; | |
505 | int ret_val = 0; | |
506 | ||
507 | spin_lock(&agp_bridge->mapped_lock); | |
508 | list_for_each_entry(curr, &agp_bridge->mapped_list, mapped_list) { | |
509 | ret_val = curr->bridge->driver->insert_memory(curr, | |
510 | curr->pg_start, | |
511 | curr->type); | |
512 | if (ret_val != 0) | |
513 | break; | |
514 | } | |
515 | spin_unlock(&agp_bridge->mapped_lock); | |
516 | return ret_val; | |
517 | } | |
518 | EXPORT_SYMBOL(agp_rebind_memory); | |
519 | ||
1da177e4 LT |
520 | /* End - Routines for handling swapping of agp_memory into the GATT */ |
521 | ||
522 | ||
523 | /* Generic Agp routines - Start */ | |
524 | static void agp_v2_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) | |
525 | { | |
526 | u32 tmp; | |
527 | ||
528 | if (*requested_mode & AGP2_RESERVED_MASK) { | |
c4dd4582 DJ |
529 | printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
530 | *requested_mode & AGP2_RESERVED_MASK, *requested_mode); | |
1da177e4 LT |
531 | *requested_mode &= ~AGP2_RESERVED_MASK; |
532 | } | |
533 | ||
28af24bb DJ |
534 | /* |
535 | * Some dumb bridges are programmed to disobey the AGP2 spec. | |
536 | * This is likely a BIOS misprogramming rather than poweron default, or | |
537 | * it would be a lot more common. | |
538 | * https://bugs.freedesktop.org/show_bug.cgi?id=8816 | |
539 | * AGPv2 spec 6.1.9 states: | |
540 | * The RATE field indicates the data transfer rates supported by this | |
541 | * device. A.G.P. devices must report all that apply. | |
542 | * Fix them up as best we can. | |
543 | */ | |
544 | switch (*bridge_agpstat & 7) { | |
545 | case 4: | |
546 | *bridge_agpstat |= (AGPSTAT2_2X | AGPSTAT2_1X); | |
547 | printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x4 rate" | |
548 | "Fixing up support for x2 & x1\n"); | |
549 | break; | |
550 | case 2: | |
551 | *bridge_agpstat |= AGPSTAT2_1X; | |
552 | printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x2 rate" | |
553 | "Fixing up support for x1\n"); | |
554 | break; | |
555 | default: | |
556 | break; | |
557 | } | |
558 | ||
1da177e4 LT |
559 | /* Check the speed bits make sense. Only one should be set. */ |
560 | tmp = *requested_mode & 7; | |
561 | switch (tmp) { | |
562 | case 0: | |
8c8b8385 | 563 | printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to x1 mode.\n", current->comm); |
1da177e4 LT |
564 | *requested_mode |= AGPSTAT2_1X; |
565 | break; | |
566 | case 1: | |
567 | case 2: | |
568 | break; | |
569 | case 3: | |
570 | *requested_mode &= ~(AGPSTAT2_1X); /* rate=2 */ | |
571 | break; | |
572 | case 4: | |
573 | break; | |
574 | case 5: | |
575 | case 6: | |
576 | case 7: | |
577 | *requested_mode &= ~(AGPSTAT2_1X|AGPSTAT2_2X); /* rate=4*/ | |
578 | break; | |
579 | } | |
580 | ||
581 | /* disable SBA if it's not supported */ | |
582 | if (!((*bridge_agpstat & AGPSTAT_SBA) && (*vga_agpstat & AGPSTAT_SBA) && (*requested_mode & AGPSTAT_SBA))) | |
583 | *bridge_agpstat &= ~AGPSTAT_SBA; | |
584 | ||
585 | /* Set rate */ | |
586 | if (!((*bridge_agpstat & AGPSTAT2_4X) && (*vga_agpstat & AGPSTAT2_4X) && (*requested_mode & AGPSTAT2_4X))) | |
587 | *bridge_agpstat &= ~AGPSTAT2_4X; | |
588 | ||
589 | if (!((*bridge_agpstat & AGPSTAT2_2X) && (*vga_agpstat & AGPSTAT2_2X) && (*requested_mode & AGPSTAT2_2X))) | |
590 | *bridge_agpstat &= ~AGPSTAT2_2X; | |
591 | ||
592 | if (!((*bridge_agpstat & AGPSTAT2_1X) && (*vga_agpstat & AGPSTAT2_1X) && (*requested_mode & AGPSTAT2_1X))) | |
593 | *bridge_agpstat &= ~AGPSTAT2_1X; | |
594 | ||
595 | /* Now we know what mode it should be, clear out the unwanted bits. */ | |
596 | if (*bridge_agpstat & AGPSTAT2_4X) | |
597 | *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_2X); /* 4X */ | |
598 | ||
599 | if (*bridge_agpstat & AGPSTAT2_2X) | |
600 | *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_4X); /* 2X */ | |
601 | ||
602 | if (*bridge_agpstat & AGPSTAT2_1X) | |
603 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); /* 1X */ | |
604 | ||
605 | /* Apply any errata. */ | |
606 | if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) | |
607 | *bridge_agpstat &= ~AGPSTAT_FW; | |
608 | ||
609 | if (agp_bridge->flags & AGP_ERRATA_SBA) | |
610 | *bridge_agpstat &= ~AGPSTAT_SBA; | |
611 | ||
612 | if (agp_bridge->flags & AGP_ERRATA_1X) { | |
613 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); | |
614 | *bridge_agpstat |= AGPSTAT2_1X; | |
615 | } | |
616 | ||
617 | /* If we've dropped down to 1X, disable fast writes. */ | |
618 | if (*bridge_agpstat & AGPSTAT2_1X) | |
619 | *bridge_agpstat &= ~AGPSTAT_FW; | |
620 | } | |
621 | ||
622 | /* | |
623 | * requested_mode = Mode requested by (typically) X. | |
624 | * bridge_agpstat = PCI_AGP_STATUS from agp bridge. | |
625 | * vga_agpstat = PCI_AGP_STATUS from graphic card. | |
626 | */ | |
627 | static void agp_v3_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) | |
628 | { | |
629 | u32 origbridge=*bridge_agpstat, origvga=*vga_agpstat; | |
630 | u32 tmp; | |
631 | ||
632 | if (*requested_mode & AGP3_RESERVED_MASK) { | |
c4dd4582 DJ |
633 | printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
634 | *requested_mode & AGP3_RESERVED_MASK, *requested_mode); | |
1da177e4 LT |
635 | *requested_mode &= ~AGP3_RESERVED_MASK; |
636 | } | |
637 | ||
638 | /* Check the speed bits make sense. */ | |
639 | tmp = *requested_mode & 7; | |
640 | if (tmp == 0) { | |
8c8b8385 | 641 | printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to AGP3 x4 mode.\n", current->comm); |
1da177e4 LT |
642 | *requested_mode |= AGPSTAT3_4X; |
643 | } | |
644 | if (tmp >= 3) { | |
8c8b8385 | 645 | printk(KERN_INFO PFX "%s tried to set rate=x%d. Setting to AGP3 x8 mode.\n", current->comm, tmp * 4); |
1da177e4 LT |
646 | *requested_mode = (*requested_mode & ~7) | AGPSTAT3_8X; |
647 | } | |
648 | ||
649 | /* ARQSZ - Set the value to the maximum one. | |
650 | * Don't allow the mode register to override values. */ | |
651 | *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_ARQSZ) | | |
652 | max_t(u32,(*bridge_agpstat & AGPSTAT_ARQSZ),(*vga_agpstat & AGPSTAT_ARQSZ))); | |
653 | ||
654 | /* Calibration cycle. | |
655 | * Don't allow the mode register to override values. */ | |
656 | *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_CAL_MASK) | | |
657 | min_t(u32,(*bridge_agpstat & AGPSTAT_CAL_MASK),(*vga_agpstat & AGPSTAT_CAL_MASK))); | |
658 | ||
659 | /* SBA *must* be supported for AGP v3 */ | |
660 | *bridge_agpstat |= AGPSTAT_SBA; | |
661 | ||
662 | /* | |
663 | * Set speed. | |
664 | * Check for invalid speeds. This can happen when applications | |
665 | * written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware | |
666 | */ | |
667 | if (*requested_mode & AGPSTAT_MODE_3_0) { | |
668 | /* | |
669 | * Caller hasn't a clue what it is doing. Bridge is in 3.0 mode, | |
670 | * have been passed a 3.0 mode, but with 2.x speed bits set. | |
671 | * AGP2.x 4x -> AGP3.0 4x. | |
672 | */ | |
673 | if (*requested_mode & AGPSTAT2_4X) { | |
8c8b8385 | 674 | printk(KERN_INFO PFX "%s passes broken AGP3 flags (%x). Fixed.\n", |
1da177e4 LT |
675 | current->comm, *requested_mode); |
676 | *requested_mode &= ~AGPSTAT2_4X; | |
677 | *requested_mode |= AGPSTAT3_4X; | |
678 | } | |
679 | } else { | |
680 | /* | |
681 | * The caller doesn't know what they are doing. We are in 3.0 mode, | |
682 | * but have been passed an AGP 2.x mode. | |
683 | * Convert AGP 1x,2x,4x -> AGP 3.0 4x. | |
684 | */ | |
8c8b8385 | 685 | printk(KERN_INFO PFX "%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n", |
1da177e4 LT |
686 | current->comm, *requested_mode); |
687 | *requested_mode &= ~(AGPSTAT2_4X | AGPSTAT2_2X | AGPSTAT2_1X); | |
688 | *requested_mode |= AGPSTAT3_4X; | |
689 | } | |
690 | ||
691 | if (*requested_mode & AGPSTAT3_8X) { | |
692 | if (!(*bridge_agpstat & AGPSTAT3_8X)) { | |
693 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); | |
694 | *bridge_agpstat |= AGPSTAT3_4X; | |
8c8b8385 | 695 | printk(KERN_INFO PFX "%s requested AGPx8 but bridge not capable.\n", current->comm); |
1da177e4 LT |
696 | return; |
697 | } | |
698 | if (!(*vga_agpstat & AGPSTAT3_8X)) { | |
699 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); | |
700 | *bridge_agpstat |= AGPSTAT3_4X; | |
8c8b8385 | 701 | printk(KERN_INFO PFX "%s requested AGPx8 but graphic card not capable.\n", current->comm); |
1da177e4 LT |
702 | return; |
703 | } | |
704 | /* All set, bridge & device can do AGP x8*/ | |
705 | *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); | |
706 | goto done; | |
707 | ||
edf03fb0 DJ |
708 | } else if (*requested_mode & AGPSTAT3_4X) { |
709 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); | |
710 | *bridge_agpstat |= AGPSTAT3_4X; | |
711 | goto done; | |
712 | ||
1da177e4 LT |
713 | } else { |
714 | ||
715 | /* | |
edf03fb0 DJ |
716 | * If we didn't specify an AGP mode, we see if both |
717 | * the graphics card, and the bridge can do x8, and use if so. | |
718 | * If not, we fall back to x4 mode. | |
1da177e4 | 719 | */ |
edf03fb0 | 720 | if ((*bridge_agpstat & AGPSTAT3_8X) && (*vga_agpstat & AGPSTAT3_8X)) { |
2cc1a413 DJ |
721 | printk(KERN_INFO PFX "No AGP mode specified. Setting to highest mode " |
722 | "supported by bridge & card (x8).\n"); | |
edf03fb0 DJ |
723 | *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
724 | *vga_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); | |
725 | } else { | |
726 | printk(KERN_INFO PFX "Fell back to AGPx4 mode because"); | |
727 | if (!(*bridge_agpstat & AGPSTAT3_8X)) { | |
2cc1a413 DJ |
728 | printk(KERN_INFO PFX "bridge couldn't do x8. bridge_agpstat:%x (orig=%x)\n", |
729 | *bridge_agpstat, origbridge); | |
edf03fb0 DJ |
730 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
731 | *bridge_agpstat |= AGPSTAT3_4X; | |
732 | } | |
733 | if (!(*vga_agpstat & AGPSTAT3_8X)) { | |
2cc1a413 DJ |
734 | printk(KERN_INFO PFX "graphics card couldn't do x8. vga_agpstat:%x (orig=%x)\n", |
735 | *vga_agpstat, origvga); | |
edf03fb0 DJ |
736 | *vga_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
737 | *vga_agpstat |= AGPSTAT3_4X; | |
738 | } | |
1da177e4 LT |
739 | } |
740 | } | |
741 | ||
742 | done: | |
743 | /* Apply any errata. */ | |
744 | if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) | |
745 | *bridge_agpstat &= ~AGPSTAT_FW; | |
746 | ||
747 | if (agp_bridge->flags & AGP_ERRATA_SBA) | |
748 | *bridge_agpstat &= ~AGPSTAT_SBA; | |
749 | ||
750 | if (agp_bridge->flags & AGP_ERRATA_1X) { | |
751 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); | |
752 | *bridge_agpstat |= AGPSTAT2_1X; | |
753 | } | |
754 | } | |
755 | ||
756 | ||
757 | /** | |
758 | * agp_collect_device_status - determine correct agp_cmd from various agp_stat's | |
759 | * @bridge: an agp_bridge_data struct allocated for the AGP host bridge. | |
760 | * @requested_mode: requested agp_stat from userspace (Typically from X) | |
761 | * @bridge_agpstat: current agp_stat from AGP bridge. | |
762 | * | |
763 | * This function will hunt for an AGP graphics card, and try to match | |
764 | * the requested mode to the capabilities of both the bridge and the card. | |
765 | */ | |
766 | u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 requested_mode, u32 bridge_agpstat) | |
767 | { | |
768 | struct pci_dev *device = NULL; | |
769 | u32 vga_agpstat; | |
770 | u8 cap_ptr; | |
771 | ||
772 | for (;;) { | |
773 | device = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, device); | |
774 | if (!device) { | |
8c8b8385 | 775 | printk(KERN_INFO PFX "Couldn't find an AGP VGA controller.\n"); |
1da177e4 LT |
776 | return 0; |
777 | } | |
778 | cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP); | |
779 | if (cap_ptr) | |
780 | break; | |
781 | } | |
782 | ||
783 | /* | |
784 | * Ok, here we have a AGP device. Disable impossible | |
785 | * settings, and adjust the readqueue to the minimum. | |
786 | */ | |
787 | pci_read_config_dword(device, cap_ptr+PCI_AGP_STATUS, &vga_agpstat); | |
788 | ||
789 | /* adjust RQ depth */ | |
790 | bridge_agpstat = ((bridge_agpstat & ~AGPSTAT_RQ_DEPTH) | | |
791 | min_t(u32, (requested_mode & AGPSTAT_RQ_DEPTH), | |
792 | min_t(u32, (bridge_agpstat & AGPSTAT_RQ_DEPTH), (vga_agpstat & AGPSTAT_RQ_DEPTH)))); | |
793 | ||
794 | /* disable FW if it's not supported */ | |
795 | if (!((bridge_agpstat & AGPSTAT_FW) && | |
796 | (vga_agpstat & AGPSTAT_FW) && | |
797 | (requested_mode & AGPSTAT_FW))) | |
798 | bridge_agpstat &= ~AGPSTAT_FW; | |
799 | ||
800 | /* Check to see if we are operating in 3.0 mode */ | |
66bb8bf8 | 801 | if (agp_bridge->mode & AGPSTAT_MODE_3_0) |
1da177e4 LT |
802 | agp_v3_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); |
803 | else | |
804 | agp_v2_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); | |
805 | ||
806 | pci_dev_put(device); | |
807 | return bridge_agpstat; | |
808 | } | |
809 | EXPORT_SYMBOL(agp_collect_device_status); | |
810 | ||
811 | ||
c7258012 | 812 | void agp_device_command(u32 bridge_agpstat, bool agp_v3) |
1da177e4 LT |
813 | { |
814 | struct pci_dev *device = NULL; | |
815 | int mode; | |
816 | ||
817 | mode = bridge_agpstat & 0x7; | |
818 | if (agp_v3) | |
819 | mode *= 4; | |
820 | ||
821 | for_each_pci_dev(device) { | |
822 | u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP); | |
823 | if (!agp) | |
824 | continue; | |
825 | ||
e3cf6951 BH |
826 | dev_info(&device->dev, "putting AGP V%d device into %dx mode\n", |
827 | agp_v3 ? 3 : 2, mode); | |
1da177e4 LT |
828 | pci_write_config_dword(device, agp + PCI_AGP_COMMAND, bridge_agpstat); |
829 | } | |
830 | } | |
831 | EXPORT_SYMBOL(agp_device_command); | |
832 | ||
833 | ||
834 | void get_agp_version(struct agp_bridge_data *bridge) | |
835 | { | |
836 | u32 ncapid; | |
837 | ||
838 | /* Exit early if already set by errata workarounds. */ | |
839 | if (bridge->major_version != 0) | |
840 | return; | |
841 | ||
842 | pci_read_config_dword(bridge->dev, bridge->capndx, &ncapid); | |
843 | bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf; | |
844 | bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf; | |
845 | } | |
846 | EXPORT_SYMBOL(get_agp_version); | |
847 | ||
848 | ||
849 | void agp_generic_enable(struct agp_bridge_data *bridge, u32 requested_mode) | |
850 | { | |
851 | u32 bridge_agpstat, temp; | |
852 | ||
853 | get_agp_version(agp_bridge); | |
854 | ||
e3cf6951 BH |
855 | dev_info(&agp_bridge->dev->dev, "AGP %d.%d bridge\n", |
856 | agp_bridge->major_version, agp_bridge->minor_version); | |
1da177e4 LT |
857 | |
858 | pci_read_config_dword(agp_bridge->dev, | |
859 | agp_bridge->capndx + PCI_AGP_STATUS, &bridge_agpstat); | |
860 | ||
861 | bridge_agpstat = agp_collect_device_status(agp_bridge, requested_mode, bridge_agpstat); | |
862 | if (bridge_agpstat == 0) | |
863 | /* Something bad happened. FIXME: Return error code? */ | |
864 | return; | |
865 | ||
866 | bridge_agpstat |= AGPSTAT_AGP_ENABLE; | |
867 | ||
868 | /* Do AGP version specific frobbing. */ | |
869 | if (bridge->major_version >= 3) { | |
66bb8bf8 | 870 | if (bridge->mode & AGPSTAT_MODE_3_0) { |
1da177e4 LT |
871 | /* If we have 3.5, we can do the isoch stuff. */ |
872 | if (bridge->minor_version >= 5) | |
873 | agp_3_5_enable(bridge); | |
c7258012 | 874 | agp_device_command(bridge_agpstat, true); |
1da177e4 LT |
875 | return; |
876 | } else { | |
877 | /* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/ | |
878 | bridge_agpstat &= ~(7<<10) ; | |
879 | pci_read_config_dword(bridge->dev, | |
880 | bridge->capndx+AGPCTRL, &temp); | |
881 | temp |= (1<<9); | |
882 | pci_write_config_dword(bridge->dev, | |
883 | bridge->capndx+AGPCTRL, temp); | |
884 | ||
e3cf6951 | 885 | dev_info(&bridge->dev->dev, "bridge is in legacy mode, falling back to 2.x\n"); |
1da177e4 LT |
886 | } |
887 | } | |
888 | ||
889 | /* AGP v<3 */ | |
c7258012 | 890 | agp_device_command(bridge_agpstat, false); |
1da177e4 LT |
891 | } |
892 | EXPORT_SYMBOL(agp_generic_enable); | |
893 | ||
894 | ||
895 | int agp_generic_create_gatt_table(struct agp_bridge_data *bridge) | |
896 | { | |
897 | char *table; | |
898 | char *table_end; | |
899 | int size; | |
900 | int page_order; | |
901 | int num_entries; | |
902 | int i; | |
903 | void *temp; | |
904 | struct page *page; | |
905 | ||
906 | /* The generic routines can't handle 2 level gatt's */ | |
907 | if (bridge->driver->size_type == LVL2_APER_SIZE) | |
908 | return -EINVAL; | |
909 | ||
910 | table = NULL; | |
911 | i = bridge->aperture_size_idx; | |
912 | temp = bridge->current_size; | |
913 | size = page_order = num_entries = 0; | |
914 | ||
915 | if (bridge->driver->size_type != FIXED_APER_SIZE) { | |
916 | do { | |
917 | switch (bridge->driver->size_type) { | |
918 | case U8_APER_SIZE: | |
919 | size = A_SIZE_8(temp)->size; | |
920 | page_order = | |
921 | A_SIZE_8(temp)->page_order; | |
922 | num_entries = | |
923 | A_SIZE_8(temp)->num_entries; | |
924 | break; | |
925 | case U16_APER_SIZE: | |
926 | size = A_SIZE_16(temp)->size; | |
927 | page_order = A_SIZE_16(temp)->page_order; | |
928 | num_entries = A_SIZE_16(temp)->num_entries; | |
929 | break; | |
930 | case U32_APER_SIZE: | |
931 | size = A_SIZE_32(temp)->size; | |
932 | page_order = A_SIZE_32(temp)->page_order; | |
933 | num_entries = A_SIZE_32(temp)->num_entries; | |
934 | break; | |
935 | /* This case will never really happen. */ | |
936 | case FIXED_APER_SIZE: | |
937 | case LVL2_APER_SIZE: | |
938 | default: | |
939 | size = page_order = num_entries = 0; | |
940 | break; | |
941 | } | |
942 | ||
07eee78e | 943 | table = alloc_gatt_pages(page_order); |
1da177e4 LT |
944 | |
945 | if (table == NULL) { | |
946 | i++; | |
947 | switch (bridge->driver->size_type) { | |
948 | case U8_APER_SIZE: | |
949 | bridge->current_size = A_IDX8(bridge); | |
950 | break; | |
951 | case U16_APER_SIZE: | |
952 | bridge->current_size = A_IDX16(bridge); | |
953 | break; | |
954 | case U32_APER_SIZE: | |
955 | bridge->current_size = A_IDX32(bridge); | |
956 | break; | |
89197e34 | 957 | /* These cases will never really happen. */ |
1da177e4 LT |
958 | case FIXED_APER_SIZE: |
959 | case LVL2_APER_SIZE: | |
960 | default: | |
1da177e4 LT |
961 | break; |
962 | } | |
963 | temp = bridge->current_size; | |
964 | } else { | |
965 | bridge->aperture_size_idx = i; | |
966 | } | |
967 | } while (!table && (i < bridge->driver->num_aperture_sizes)); | |
968 | } else { | |
969 | size = ((struct aper_size_info_fixed *) temp)->size; | |
970 | page_order = ((struct aper_size_info_fixed *) temp)->page_order; | |
971 | num_entries = ((struct aper_size_info_fixed *) temp)->num_entries; | |
07eee78e | 972 | table = alloc_gatt_pages(page_order); |
1da177e4 LT |
973 | } |
974 | ||
975 | if (table == NULL) | |
976 | return -ENOMEM; | |
977 | ||
978 | table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); | |
979 | ||
980 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) | |
981 | SetPageReserved(page); | |
982 | ||
983 | bridge->gatt_table_real = (u32 *) table; | |
984 | agp_gatt_table = (void *)table; | |
985 | ||
986 | bridge->driver->cache_flush(); | |
fcea424d AV |
987 | #ifdef CONFIG_X86 |
988 | set_memory_uc((unsigned long)table, 1 << page_order); | |
989 | bridge->gatt_table = (void *)table; | |
990 | #else | |
07eee78e | 991 | bridge->gatt_table = ioremap_nocache(virt_to_gart(table), |
1da177e4 LT |
992 | (PAGE_SIZE * (1 << page_order))); |
993 | bridge->driver->cache_flush(); | |
fcea424d | 994 | #endif |
1da177e4 LT |
995 | |
996 | if (bridge->gatt_table == NULL) { | |
997 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) | |
998 | ClearPageReserved(page); | |
999 | ||
07eee78e | 1000 | free_gatt_pages(table, page_order); |
1da177e4 LT |
1001 | |
1002 | return -ENOMEM; | |
1003 | } | |
07eee78e | 1004 | bridge->gatt_bus_addr = virt_to_gart(bridge->gatt_table_real); |
1da177e4 LT |
1005 | |
1006 | /* AK: bogus, should encode addresses > 4GB */ | |
1007 | for (i = 0; i < num_entries; i++) { | |
1008 | writel(bridge->scratch_page, bridge->gatt_table+i); | |
1009 | readl(bridge->gatt_table+i); /* PCI Posting. */ | |
1010 | } | |
1011 | ||
1012 | return 0; | |
1013 | } | |
1014 | EXPORT_SYMBOL(agp_generic_create_gatt_table); | |
1015 | ||
1016 | int agp_generic_free_gatt_table(struct agp_bridge_data *bridge) | |
1017 | { | |
1018 | int page_order; | |
1019 | char *table, *table_end; | |
1020 | void *temp; | |
1021 | struct page *page; | |
1022 | ||
1023 | temp = bridge->current_size; | |
1024 | ||
1025 | switch (bridge->driver->size_type) { | |
1026 | case U8_APER_SIZE: | |
1027 | page_order = A_SIZE_8(temp)->page_order; | |
1028 | break; | |
1029 | case U16_APER_SIZE: | |
1030 | page_order = A_SIZE_16(temp)->page_order; | |
1031 | break; | |
1032 | case U32_APER_SIZE: | |
1033 | page_order = A_SIZE_32(temp)->page_order; | |
1034 | break; | |
1035 | case FIXED_APER_SIZE: | |
1036 | page_order = A_SIZE_FIX(temp)->page_order; | |
1037 | break; | |
1038 | case LVL2_APER_SIZE: | |
1039 | /* The generic routines can't deal with 2 level gatt's */ | |
1040 | return -EINVAL; | |
1041 | break; | |
1042 | default: | |
1043 | page_order = 0; | |
1044 | break; | |
1045 | } | |
1046 | ||
1047 | /* Do not worry about freeing memory, because if this is | |
1048 | * called, then all agp memory is deallocated and removed | |
1049 | * from the table. */ | |
1050 | ||
fcea424d AV |
1051 | #ifdef CONFIG_X86 |
1052 | set_memory_wb((unsigned long)bridge->gatt_table, 1 << page_order); | |
1053 | #else | |
1da177e4 | 1054 | iounmap(bridge->gatt_table); |
fcea424d | 1055 | #endif |
1da177e4 LT |
1056 | table = (char *) bridge->gatt_table_real; |
1057 | table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); | |
1058 | ||
1059 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) | |
1060 | ClearPageReserved(page); | |
1061 | ||
07eee78e | 1062 | free_gatt_pages(bridge->gatt_table_real, page_order); |
1da177e4 LT |
1063 | |
1064 | agp_gatt_table = NULL; | |
1065 | bridge->gatt_table = NULL; | |
1066 | bridge->gatt_table_real = NULL; | |
1067 | bridge->gatt_bus_addr = 0; | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | EXPORT_SYMBOL(agp_generic_free_gatt_table); | |
1072 | ||
1073 | ||
1074 | int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type) | |
1075 | { | |
1076 | int num_entries; | |
1077 | size_t i; | |
1078 | off_t j; | |
1079 | void *temp; | |
1080 | struct agp_bridge_data *bridge; | |
a030ce44 | 1081 | int mask_type; |
1da177e4 LT |
1082 | |
1083 | bridge = mem->bridge; | |
1084 | if (!bridge) | |
1085 | return -EINVAL; | |
1086 | ||
5aa80c72 TH |
1087 | if (mem->page_count == 0) |
1088 | return 0; | |
1089 | ||
1da177e4 LT |
1090 | temp = bridge->current_size; |
1091 | ||
1092 | switch (bridge->driver->size_type) { | |
1093 | case U8_APER_SIZE: | |
1094 | num_entries = A_SIZE_8(temp)->num_entries; | |
1095 | break; | |
1096 | case U16_APER_SIZE: | |
1097 | num_entries = A_SIZE_16(temp)->num_entries; | |
1098 | break; | |
1099 | case U32_APER_SIZE: | |
1100 | num_entries = A_SIZE_32(temp)->num_entries; | |
1101 | break; | |
1102 | case FIXED_APER_SIZE: | |
1103 | num_entries = A_SIZE_FIX(temp)->num_entries; | |
1104 | break; | |
1105 | case LVL2_APER_SIZE: | |
1106 | /* The generic routines can't deal with 2 level gatt's */ | |
1107 | return -EINVAL; | |
1108 | break; | |
1109 | default: | |
1110 | num_entries = 0; | |
1111 | break; | |
1112 | } | |
1113 | ||
1114 | num_entries -= agp_memory_reserved/PAGE_SIZE; | |
1115 | if (num_entries < 0) num_entries = 0; | |
1116 | ||
1c14cfbb | 1117 | if (type != mem->type) |
a030ce44 | 1118 | return -EINVAL; |
a030ce44 TH |
1119 | |
1120 | mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); | |
1121 | if (mask_type != 0) { | |
1da177e4 LT |
1122 | /* The generic routines know nothing of memory types */ |
1123 | return -EINVAL; | |
1124 | } | |
1125 | ||
1126 | /* AK: could wrap */ | |
1127 | if ((pg_start + mem->page_count) > num_entries) | |
1128 | return -EINVAL; | |
1129 | ||
1130 | j = pg_start; | |
1131 | ||
1132 | while (j < (pg_start + mem->page_count)) { | |
1133 | if (!PGE_EMPTY(bridge, readl(bridge->gatt_table+j))) | |
1134 | return -EBUSY; | |
1135 | j++; | |
1136 | } | |
1137 | ||
c7258012 | 1138 | if (!mem->is_flushed) { |
1da177e4 | 1139 | bridge->driver->cache_flush(); |
c7258012 | 1140 | mem->is_flushed = true; |
1da177e4 LT |
1141 | } |
1142 | ||
1143 | for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { | |
2a4ceb6d DW |
1144 | writel(bridge->driver->mask_memory(bridge, |
1145 | phys_to_gart(page_to_phys(mem->pages[i])), | |
1146 | mask_type), | |
a030ce44 | 1147 | bridge->gatt_table+j); |
1da177e4 | 1148 | } |
5aa80c72 | 1149 | readl(bridge->gatt_table+j-1); /* PCI Posting. */ |
1da177e4 LT |
1150 | |
1151 | bridge->driver->tlb_flush(mem); | |
1152 | return 0; | |
1153 | } | |
1154 | EXPORT_SYMBOL(agp_generic_insert_memory); | |
1155 | ||
1156 | ||
1157 | int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type) | |
1158 | { | |
1159 | size_t i; | |
1160 | struct agp_bridge_data *bridge; | |
a030ce44 | 1161 | int mask_type; |
1da177e4 LT |
1162 | |
1163 | bridge = mem->bridge; | |
1164 | if (!bridge) | |
1165 | return -EINVAL; | |
1166 | ||
5aa80c72 TH |
1167 | if (mem->page_count == 0) |
1168 | return 0; | |
1169 | ||
a030ce44 TH |
1170 | if (type != mem->type) |
1171 | return -EINVAL; | |
1172 | ||
1173 | mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); | |
1174 | if (mask_type != 0) { | |
1da177e4 LT |
1175 | /* The generic routines know nothing of memory types */ |
1176 | return -EINVAL; | |
1177 | } | |
1178 | ||
1179 | /* AK: bogus, should encode addresses > 4GB */ | |
1180 | for (i = pg_start; i < (mem->page_count + pg_start); i++) { | |
1181 | writel(bridge->scratch_page, bridge->gatt_table+i); | |
1da177e4 | 1182 | } |
5aa80c72 | 1183 | readl(bridge->gatt_table+i-1); /* PCI Posting. */ |
1da177e4 | 1184 | |
1da177e4 LT |
1185 | bridge->driver->tlb_flush(mem); |
1186 | return 0; | |
1187 | } | |
1188 | EXPORT_SYMBOL(agp_generic_remove_memory); | |
1189 | ||
1da177e4 LT |
1190 | struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type) |
1191 | { | |
1192 | return NULL; | |
1193 | } | |
1194 | EXPORT_SYMBOL(agp_generic_alloc_by_type); | |
1195 | ||
1da177e4 LT |
1196 | void agp_generic_free_by_type(struct agp_memory *curr) |
1197 | { | |
a030ce44 | 1198 | agp_free_page_array(curr); |
1da177e4 LT |
1199 | agp_free_key(curr->key); |
1200 | kfree(curr); | |
1201 | } | |
1202 | EXPORT_SYMBOL(agp_generic_free_by_type); | |
1203 | ||
a030ce44 TH |
1204 | struct agp_memory *agp_generic_alloc_user(size_t page_count, int type) |
1205 | { | |
1206 | struct agp_memory *new; | |
1207 | int i; | |
1208 | int pages; | |
1209 | ||
1210 | pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; | |
1211 | new = agp_create_user_memory(page_count); | |
1212 | if (new == NULL) | |
1213 | return NULL; | |
1214 | ||
1c14cfbb | 1215 | for (i = 0; i < page_count; i++) |
07613ba2 | 1216 | new->pages[i] = 0; |
a030ce44 TH |
1217 | new->page_count = 0; |
1218 | new->type = type; | |
1219 | new->num_scratch_pages = pages; | |
1220 | ||
1221 | return new; | |
1222 | } | |
1223 | EXPORT_SYMBOL(agp_generic_alloc_user); | |
1224 | ||
1da177e4 LT |
1225 | /* |
1226 | * Basic Page Allocation Routines - | |
1227 | * These routines handle page allocation and by default they reserve the allocated | |
1228 | * memory. They also handle incrementing the current_memory_agp value, Which is checked | |
1229 | * against a maximum value. | |
1230 | */ | |
1231 | ||
37acee10 SL |
1232 | int agp_generic_alloc_pages(struct agp_bridge_data *bridge, struct agp_memory *mem, size_t num_pages) |
1233 | { | |
1234 | struct page * page; | |
1235 | int i, ret = -ENOMEM; | |
1236 | ||
1237 | for (i = 0; i < num_pages; i++) { | |
59de2beb | 1238 | page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); |
37acee10 SL |
1239 | /* agp_free_memory() needs gart address */ |
1240 | if (page == NULL) | |
1241 | goto out; | |
1242 | ||
1243 | #ifndef CONFIG_X86 | |
1244 | map_page_into_agp(page); | |
1245 | #endif | |
1246 | get_page(page); | |
1247 | atomic_inc(&agp_bridge->current_memory_agp); | |
1248 | ||
07613ba2 | 1249 | mem->pages[i] = page; |
37acee10 SL |
1250 | mem->page_count++; |
1251 | } | |
1252 | ||
1253 | #ifdef CONFIG_X86 | |
07613ba2 | 1254 | set_pages_array_uc(mem->pages, num_pages); |
37acee10 SL |
1255 | #endif |
1256 | ret = 0; | |
1257 | out: | |
37acee10 SL |
1258 | return ret; |
1259 | } | |
1260 | EXPORT_SYMBOL(agp_generic_alloc_pages); | |
1261 | ||
07613ba2 | 1262 | struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge) |
1da177e4 LT |
1263 | { |
1264 | struct page * page; | |
1265 | ||
59de2beb | 1266 | page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); |
1da177e4 LT |
1267 | if (page == NULL) |
1268 | return NULL; | |
1269 | ||
9326d61b | 1270 | map_page_into_agp(page); |
1da177e4 LT |
1271 | |
1272 | get_page(page); | |
1da177e4 | 1273 | atomic_inc(&agp_bridge->current_memory_agp); |
07613ba2 | 1274 | return page; |
1da177e4 LT |
1275 | } |
1276 | EXPORT_SYMBOL(agp_generic_alloc_page); | |
1277 | ||
bd07928c SL |
1278 | void agp_generic_destroy_pages(struct agp_memory *mem) |
1279 | { | |
1280 | int i; | |
bd07928c SL |
1281 | struct page *page; |
1282 | ||
1283 | if (!mem) | |
1284 | return; | |
1285 | ||
bd07928c | 1286 | #ifdef CONFIG_X86 |
07613ba2 | 1287 | set_pages_array_wb(mem->pages, mem->page_count); |
bd07928c SL |
1288 | #endif |
1289 | ||
1290 | for (i = 0; i < mem->page_count; i++) { | |
07613ba2 | 1291 | page = mem->pages[i]; |
bd07928c SL |
1292 | |
1293 | #ifndef CONFIG_X86 | |
1294 | unmap_page_from_agp(page); | |
1295 | #endif | |
bd07928c | 1296 | put_page(page); |
07613ba2 | 1297 | __free_page(page); |
bd07928c | 1298 | atomic_dec(&agp_bridge->current_memory_agp); |
07613ba2 | 1299 | mem->pages[i] = NULL; |
bd07928c SL |
1300 | } |
1301 | } | |
1302 | EXPORT_SYMBOL(agp_generic_destroy_pages); | |
1da177e4 | 1303 | |
07613ba2 | 1304 | void agp_generic_destroy_page(struct page *page, int flags) |
1da177e4 | 1305 | { |
07613ba2 | 1306 | if (page == NULL) |
1da177e4 LT |
1307 | return; |
1308 | ||
a2721e99 DA |
1309 | if (flags & AGP_PAGE_DESTROY_UNMAP) |
1310 | unmap_page_from_agp(page); | |
1311 | ||
1312 | if (flags & AGP_PAGE_DESTROY_FREE) { | |
1313 | put_page(page); | |
07613ba2 | 1314 | __free_page(page); |
a2721e99 DA |
1315 | atomic_dec(&agp_bridge->current_memory_agp); |
1316 | } | |
1da177e4 LT |
1317 | } |
1318 | EXPORT_SYMBOL(agp_generic_destroy_page); | |
1319 | ||
1320 | /* End Basic Page Allocation Routines */ | |
1321 | ||
1322 | ||
1323 | /** | |
1324 | * agp_enable - initialise the agp point-to-point connection. | |
1325 | * | |
1326 | * @mode: agp mode register value to configure with. | |
1327 | */ | |
1328 | void agp_enable(struct agp_bridge_data *bridge, u32 mode) | |
1329 | { | |
1330 | if (!bridge) | |
1331 | return; | |
1332 | bridge->driver->agp_enable(bridge, mode); | |
1333 | } | |
1334 | EXPORT_SYMBOL(agp_enable); | |
1335 | ||
1336 | /* When we remove the global variable agp_bridge from all drivers | |
1337 | * then agp_alloc_bridge and agp_generic_find_bridge need to be updated | |
1338 | */ | |
1339 | ||
1340 | struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev) | |
1341 | { | |
1342 | if (list_empty(&agp_bridges)) | |
1343 | return NULL; | |
1344 | ||
1345 | return agp_bridge; | |
1346 | } | |
1347 | ||
1348 | static void ipi_handler(void *null) | |
1349 | { | |
1350 | flush_agp_cache(); | |
1351 | } | |
1352 | ||
1353 | void global_cache_flush(void) | |
1354 | { | |
15c8b6c1 | 1355 | if (on_each_cpu(ipi_handler, NULL, 1) != 0) |
1da177e4 LT |
1356 | panic(PFX "timed out waiting for the other CPUs!\n"); |
1357 | } | |
1358 | EXPORT_SYMBOL(global_cache_flush); | |
1359 | ||
1360 | unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge, | |
2a4ceb6d | 1361 | dma_addr_t addr, int type) |
1da177e4 LT |
1362 | { |
1363 | /* memory type is ignored in the generic routine */ | |
1364 | if (bridge->driver->masks) | |
1365 | return addr | bridge->driver->masks[0].mask; | |
1366 | else | |
1367 | return addr; | |
1368 | } | |
1369 | EXPORT_SYMBOL(agp_generic_mask_memory); | |
1370 | ||
a030ce44 TH |
1371 | int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge, |
1372 | int type) | |
1373 | { | |
1374 | if (type >= AGP_USER_TYPES) | |
1375 | return 0; | |
1376 | return type; | |
1377 | } | |
1378 | EXPORT_SYMBOL(agp_generic_type_to_mask_type); | |
1379 | ||
1da177e4 LT |
1380 | /* |
1381 | * These functions are implemented according to the AGPv3 spec, | |
1382 | * which covers implementation details that had previously been | |
1383 | * left open. | |
1384 | */ | |
1385 | ||
1386 | int agp3_generic_fetch_size(void) | |
1387 | { | |
1388 | u16 temp_size; | |
1389 | int i; | |
1390 | struct aper_size_info_16 *values; | |
1391 | ||
1392 | pci_read_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, &temp_size); | |
1393 | values = A_SIZE_16(agp_bridge->driver->aperture_sizes); | |
1394 | ||
1395 | for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { | |
1396 | if (temp_size == values[i].size_value) { | |
1397 | agp_bridge->previous_size = | |
1398 | agp_bridge->current_size = (void *) (values + i); | |
1399 | ||
1400 | agp_bridge->aperture_size_idx = i; | |
1401 | return values[i].size; | |
1402 | } | |
1403 | } | |
1404 | return 0; | |
1405 | } | |
1406 | EXPORT_SYMBOL(agp3_generic_fetch_size); | |
1407 | ||
1408 | void agp3_generic_tlbflush(struct agp_memory *mem) | |
1409 | { | |
1410 | u32 ctrl; | |
1411 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); | |
1412 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_GTLBEN); | |
1413 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl); | |
1414 | } | |
1415 | EXPORT_SYMBOL(agp3_generic_tlbflush); | |
1416 | ||
1417 | int agp3_generic_configure(void) | |
1418 | { | |
1419 | u32 temp; | |
1420 | struct aper_size_info_16 *current_size; | |
1421 | ||
1422 | current_size = A_SIZE_16(agp_bridge->current_size); | |
1423 | ||
1424 | pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); | |
1425 | agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); | |
1426 | ||
1427 | /* set aperture size */ | |
1428 | pci_write_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, current_size->size_value); | |
1429 | /* set gart pointer */ | |
1430 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPGARTLO, agp_bridge->gatt_bus_addr); | |
1431 | /* enable aperture and GTLB */ | |
1432 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &temp); | |
1433 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, temp | AGPCTRL_APERENB | AGPCTRL_GTLBEN); | |
1434 | return 0; | |
1435 | } | |
1436 | EXPORT_SYMBOL(agp3_generic_configure); | |
1437 | ||
1438 | void agp3_generic_cleanup(void) | |
1439 | { | |
1440 | u32 ctrl; | |
1441 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); | |
1442 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_APERENB); | |
1443 | } | |
1444 | EXPORT_SYMBOL(agp3_generic_cleanup); | |
1445 | ||
e5524f35 | 1446 | const struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] = |
1da177e4 LT |
1447 | { |
1448 | {4096, 1048576, 10,0x000}, | |
1449 | {2048, 524288, 9, 0x800}, | |
1450 | {1024, 262144, 8, 0xc00}, | |
1451 | { 512, 131072, 7, 0xe00}, | |
1452 | { 256, 65536, 6, 0xf00}, | |
1453 | { 128, 32768, 5, 0xf20}, | |
1454 | { 64, 16384, 4, 0xf30}, | |
1455 | { 32, 8192, 3, 0xf38}, | |
1456 | { 16, 4096, 2, 0xf3c}, | |
1457 | { 8, 2048, 1, 0xf3e}, | |
1458 | { 4, 1024, 0, 0xf3f} | |
1459 | }; | |
1460 | EXPORT_SYMBOL(agp3_generic_sizes); | |
1461 |