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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> | |
40 | #include <asm/io.h> | |
41 | #include <asm/cacheflush.h> | |
42 | #include <asm/pgtable.h> | |
43 | #include "agp.h" | |
44 | ||
45 | __u32 *agp_gatt_table; | |
46 | int agp_memory_reserved; | |
47 | ||
48 | /* | |
49 | * Needed by the Nforce GART driver for the time being. Would be | |
50 | * nice to do this some other way instead of needing this export. | |
51 | */ | |
52 | EXPORT_SYMBOL_GPL(agp_memory_reserved); | |
53 | ||
54 | #if defined(CONFIG_X86) | |
55 | int map_page_into_agp(struct page *page) | |
56 | { | |
57 | int i; | |
58 | i = change_page_attr(page, 1, PAGE_KERNEL_NOCACHE); | |
88d51967 AH |
59 | /* Caller's responsibility to call global_flush_tlb() for |
60 | * performance reasons */ | |
1da177e4 LT |
61 | return i; |
62 | } | |
63 | EXPORT_SYMBOL_GPL(map_page_into_agp); | |
64 | ||
65 | int unmap_page_from_agp(struct page *page) | |
66 | { | |
67 | int i; | |
68 | i = change_page_attr(page, 1, PAGE_KERNEL); | |
88d51967 AH |
69 | /* Caller's responsibility to call global_flush_tlb() for |
70 | * performance reasons */ | |
1da177e4 LT |
71 | return i; |
72 | } | |
73 | EXPORT_SYMBOL_GPL(unmap_page_from_agp); | |
74 | #endif | |
75 | ||
76 | /* | |
77 | * Generic routines for handling agp_memory structures - | |
78 | * They use the basic page allocation routines to do the brunt of the work. | |
79 | */ | |
80 | ||
81 | void agp_free_key(int key) | |
82 | { | |
83 | if (key < 0) | |
84 | return; | |
85 | ||
86 | if (key < MAXKEY) | |
87 | clear_bit(key, agp_bridge->key_list); | |
88 | } | |
89 | EXPORT_SYMBOL(agp_free_key); | |
90 | ||
91 | ||
92 | static int agp_get_key(void) | |
93 | { | |
94 | int bit; | |
95 | ||
96 | bit = find_first_zero_bit(agp_bridge->key_list, MAXKEY); | |
97 | if (bit < MAXKEY) { | |
98 | set_bit(bit, agp_bridge->key_list); | |
99 | return bit; | |
100 | } | |
101 | return -1; | |
102 | } | |
103 | ||
104 | ||
105 | struct agp_memory *agp_create_memory(int scratch_pages) | |
106 | { | |
107 | struct agp_memory *new; | |
108 | ||
0ea27d9f | 109 | new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
1da177e4 LT |
110 | if (new == NULL) |
111 | return NULL; | |
112 | ||
1da177e4 LT |
113 | new->key = agp_get_key(); |
114 | ||
115 | if (new->key < 0) { | |
116 | kfree(new); | |
117 | return NULL; | |
118 | } | |
119 | new->memory = vmalloc(PAGE_SIZE * scratch_pages); | |
120 | ||
121 | if (new->memory == NULL) { | |
122 | agp_free_key(new->key); | |
123 | kfree(new); | |
124 | return NULL; | |
125 | } | |
126 | new->num_scratch_pages = scratch_pages; | |
127 | return new; | |
128 | } | |
129 | EXPORT_SYMBOL(agp_create_memory); | |
130 | ||
131 | /** | |
132 | * agp_free_memory - free memory associated with an agp_memory pointer. | |
133 | * | |
134 | * @curr: agp_memory pointer to be freed. | |
135 | * | |
136 | * It is the only function that can be called when the backend is not owned | |
137 | * by the caller. (So it can free memory on client death.) | |
138 | */ | |
139 | void agp_free_memory(struct agp_memory *curr) | |
140 | { | |
141 | size_t i; | |
142 | ||
143 | if (curr == NULL) | |
144 | return; | |
145 | ||
146 | if (curr->is_bound == TRUE) | |
147 | agp_unbind_memory(curr); | |
148 | ||
149 | if (curr->type != 0) { | |
150 | curr->bridge->driver->free_by_type(curr); | |
151 | return; | |
152 | } | |
153 | if (curr->page_count != 0) { | |
154 | for (i = 0; i < curr->page_count; i++) { | |
07eee78e | 155 | curr->bridge->driver->agp_destroy_page(gart_to_virt(curr->memory[i])); |
1da177e4 | 156 | } |
6730c3c1 | 157 | flush_agp_mappings(); |
1da177e4 LT |
158 | } |
159 | agp_free_key(curr->key); | |
160 | vfree(curr->memory); | |
161 | kfree(curr); | |
162 | } | |
163 | EXPORT_SYMBOL(agp_free_memory); | |
164 | ||
165 | #define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long)) | |
166 | ||
167 | /** | |
168 | * agp_allocate_memory - allocate a group of pages of a certain type. | |
169 | * | |
170 | * @page_count: size_t argument of the number of pages | |
171 | * @type: u32 argument of the type of memory to be allocated. | |
172 | * | |
173 | * Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which | |
174 | * maps to physical ram. Any other type is device dependent. | |
175 | * | |
176 | * It returns NULL whenever memory is unavailable. | |
177 | */ | |
178 | struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge, | |
179 | size_t page_count, u32 type) | |
180 | { | |
181 | int scratch_pages; | |
182 | struct agp_memory *new; | |
183 | size_t i; | |
184 | ||
185 | if (!bridge) | |
186 | return NULL; | |
187 | ||
188 | if ((atomic_read(&bridge->current_memory_agp) + page_count) > bridge->max_memory_agp) | |
189 | return NULL; | |
190 | ||
191 | if (type != 0) { | |
192 | new = bridge->driver->alloc_by_type(page_count, type); | |
193 | if (new) | |
194 | new->bridge = bridge; | |
195 | return new; | |
196 | } | |
197 | ||
198 | scratch_pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; | |
199 | ||
200 | new = agp_create_memory(scratch_pages); | |
201 | ||
202 | if (new == NULL) | |
203 | return NULL; | |
204 | ||
205 | for (i = 0; i < page_count; i++) { | |
206 | void *addr = bridge->driver->agp_alloc_page(bridge); | |
207 | ||
208 | if (addr == NULL) { | |
209 | agp_free_memory(new); | |
210 | return NULL; | |
211 | } | |
07eee78e | 212 | new->memory[i] = virt_to_gart(addr); |
1da177e4 LT |
213 | new->page_count++; |
214 | } | |
88d51967 | 215 | new->bridge = bridge; |
1da177e4 LT |
216 | |
217 | flush_agp_mappings(); | |
218 | ||
219 | return new; | |
220 | } | |
221 | EXPORT_SYMBOL(agp_allocate_memory); | |
222 | ||
223 | ||
224 | /* End - Generic routines for handling agp_memory structures */ | |
225 | ||
226 | ||
227 | static int agp_return_size(void) | |
228 | { | |
229 | int current_size; | |
230 | void *temp; | |
231 | ||
232 | temp = agp_bridge->current_size; | |
233 | ||
234 | switch (agp_bridge->driver->size_type) { | |
235 | case U8_APER_SIZE: | |
236 | current_size = A_SIZE_8(temp)->size; | |
237 | break; | |
238 | case U16_APER_SIZE: | |
239 | current_size = A_SIZE_16(temp)->size; | |
240 | break; | |
241 | case U32_APER_SIZE: | |
242 | current_size = A_SIZE_32(temp)->size; | |
243 | break; | |
244 | case LVL2_APER_SIZE: | |
245 | current_size = A_SIZE_LVL2(temp)->size; | |
246 | break; | |
247 | case FIXED_APER_SIZE: | |
248 | current_size = A_SIZE_FIX(temp)->size; | |
249 | break; | |
250 | default: | |
251 | current_size = 0; | |
252 | break; | |
253 | } | |
254 | ||
255 | current_size -= (agp_memory_reserved / (1024*1024)); | |
256 | if (current_size <0) | |
257 | current_size = 0; | |
258 | return current_size; | |
259 | } | |
260 | ||
261 | ||
262 | int agp_num_entries(void) | |
263 | { | |
264 | int num_entries; | |
265 | void *temp; | |
266 | ||
267 | temp = agp_bridge->current_size; | |
268 | ||
269 | switch (agp_bridge->driver->size_type) { | |
270 | case U8_APER_SIZE: | |
271 | num_entries = A_SIZE_8(temp)->num_entries; | |
272 | break; | |
273 | case U16_APER_SIZE: | |
274 | num_entries = A_SIZE_16(temp)->num_entries; | |
275 | break; | |
276 | case U32_APER_SIZE: | |
277 | num_entries = A_SIZE_32(temp)->num_entries; | |
278 | break; | |
279 | case LVL2_APER_SIZE: | |
280 | num_entries = A_SIZE_LVL2(temp)->num_entries; | |
281 | break; | |
282 | case FIXED_APER_SIZE: | |
283 | num_entries = A_SIZE_FIX(temp)->num_entries; | |
284 | break; | |
285 | default: | |
286 | num_entries = 0; | |
287 | break; | |
288 | } | |
289 | ||
290 | num_entries -= agp_memory_reserved>>PAGE_SHIFT; | |
291 | if (num_entries<0) | |
292 | num_entries = 0; | |
293 | return num_entries; | |
294 | } | |
295 | EXPORT_SYMBOL_GPL(agp_num_entries); | |
296 | ||
297 | ||
1da177e4 LT |
298 | /** |
299 | * agp_copy_info - copy bridge state information | |
300 | * | |
6a92a4e0 | 301 | * @info: agp_kern_info pointer. The caller should insure that this pointer is valid. |
1da177e4 LT |
302 | * |
303 | * This function copies information about the agp bridge device and the state of | |
304 | * the agp backend into an agp_kern_info pointer. | |
305 | */ | |
306 | int agp_copy_info(struct agp_bridge_data *bridge, struct agp_kern_info *info) | |
307 | { | |
308 | memset(info, 0, sizeof(struct agp_kern_info)); | |
309 | if (!bridge) { | |
310 | info->chipset = NOT_SUPPORTED; | |
311 | return -EIO; | |
312 | } | |
313 | ||
314 | info->version.major = bridge->version->major; | |
315 | info->version.minor = bridge->version->minor; | |
316 | info->chipset = SUPPORTED; | |
317 | info->device = bridge->dev; | |
66bb8bf8 | 318 | if (bridge->mode & AGPSTAT_MODE_3_0) |
1da177e4 LT |
319 | info->mode = bridge->mode & ~AGP3_RESERVED_MASK; |
320 | else | |
321 | info->mode = bridge->mode & ~AGP2_RESERVED_MASK; | |
1da177e4 LT |
322 | info->aper_base = bridge->gart_bus_addr; |
323 | info->aper_size = agp_return_size(); | |
324 | info->max_memory = bridge->max_memory_agp; | |
325 | info->current_memory = atomic_read(&bridge->current_memory_agp); | |
326 | info->cant_use_aperture = bridge->driver->cant_use_aperture; | |
327 | info->vm_ops = bridge->vm_ops; | |
328 | info->page_mask = ~0UL; | |
329 | return 0; | |
330 | } | |
331 | EXPORT_SYMBOL(agp_copy_info); | |
332 | ||
333 | /* End - Routine to copy over information structure */ | |
334 | ||
335 | /* | |
336 | * Routines for handling swapping of agp_memory into the GATT - | |
337 | * These routines take agp_memory and insert them into the GATT. | |
338 | * They call device specific routines to actually write to the GATT. | |
339 | */ | |
340 | ||
341 | /** | |
342 | * agp_bind_memory - Bind an agp_memory structure into the GATT. | |
343 | * | |
344 | * @curr: agp_memory pointer | |
345 | * @pg_start: an offset into the graphics aperture translation table | |
346 | * | |
347 | * It returns -EINVAL if the pointer == NULL. | |
348 | * It returns -EBUSY if the area of the table requested is already in use. | |
349 | */ | |
350 | int agp_bind_memory(struct agp_memory *curr, off_t pg_start) | |
351 | { | |
352 | int ret_val; | |
353 | ||
354 | if (curr == NULL) | |
355 | return -EINVAL; | |
356 | ||
357 | if (curr->is_bound == TRUE) { | |
8c8b8385 | 358 | printk(KERN_INFO PFX "memory %p is already bound!\n", curr); |
1da177e4 LT |
359 | return -EINVAL; |
360 | } | |
361 | if (curr->is_flushed == FALSE) { | |
362 | curr->bridge->driver->cache_flush(); | |
363 | curr->is_flushed = TRUE; | |
364 | } | |
365 | ret_val = curr->bridge->driver->insert_memory(curr, pg_start, curr->type); | |
366 | ||
367 | if (ret_val != 0) | |
368 | return ret_val; | |
369 | ||
370 | curr->is_bound = TRUE; | |
371 | curr->pg_start = pg_start; | |
372 | return 0; | |
373 | } | |
374 | EXPORT_SYMBOL(agp_bind_memory); | |
375 | ||
376 | ||
377 | /** | |
378 | * agp_unbind_memory - Removes an agp_memory structure from the GATT | |
379 | * | |
380 | * @curr: agp_memory pointer to be removed from the GATT. | |
381 | * | |
382 | * It returns -EINVAL if this piece of agp_memory is not currently bound to | |
383 | * the graphics aperture translation table or if the agp_memory pointer == NULL | |
384 | */ | |
385 | int agp_unbind_memory(struct agp_memory *curr) | |
386 | { | |
387 | int ret_val; | |
388 | ||
389 | if (curr == NULL) | |
390 | return -EINVAL; | |
391 | ||
392 | if (curr->is_bound != TRUE) { | |
8c8b8385 | 393 | printk(KERN_INFO PFX "memory %p was not bound!\n", curr); |
1da177e4 LT |
394 | return -EINVAL; |
395 | } | |
396 | ||
397 | ret_val = curr->bridge->driver->remove_memory(curr, curr->pg_start, curr->type); | |
398 | ||
399 | if (ret_val != 0) | |
400 | return ret_val; | |
401 | ||
402 | curr->is_bound = FALSE; | |
403 | curr->pg_start = 0; | |
404 | return 0; | |
405 | } | |
406 | EXPORT_SYMBOL(agp_unbind_memory); | |
407 | ||
408 | /* End - Routines for handling swapping of agp_memory into the GATT */ | |
409 | ||
410 | ||
411 | /* Generic Agp routines - Start */ | |
412 | static void agp_v2_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) | |
413 | { | |
414 | u32 tmp; | |
415 | ||
416 | if (*requested_mode & AGP2_RESERVED_MASK) { | |
c4dd4582 DJ |
417 | printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
418 | *requested_mode & AGP2_RESERVED_MASK, *requested_mode); | |
1da177e4 LT |
419 | *requested_mode &= ~AGP2_RESERVED_MASK; |
420 | } | |
421 | ||
422 | /* Check the speed bits make sense. Only one should be set. */ | |
423 | tmp = *requested_mode & 7; | |
424 | switch (tmp) { | |
425 | case 0: | |
8c8b8385 | 426 | printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to x1 mode.\n", current->comm); |
1da177e4 LT |
427 | *requested_mode |= AGPSTAT2_1X; |
428 | break; | |
429 | case 1: | |
430 | case 2: | |
431 | break; | |
432 | case 3: | |
433 | *requested_mode &= ~(AGPSTAT2_1X); /* rate=2 */ | |
434 | break; | |
435 | case 4: | |
436 | break; | |
437 | case 5: | |
438 | case 6: | |
439 | case 7: | |
440 | *requested_mode &= ~(AGPSTAT2_1X|AGPSTAT2_2X); /* rate=4*/ | |
441 | break; | |
442 | } | |
443 | ||
444 | /* disable SBA if it's not supported */ | |
445 | if (!((*bridge_agpstat & AGPSTAT_SBA) && (*vga_agpstat & AGPSTAT_SBA) && (*requested_mode & AGPSTAT_SBA))) | |
446 | *bridge_agpstat &= ~AGPSTAT_SBA; | |
447 | ||
448 | /* Set rate */ | |
449 | if (!((*bridge_agpstat & AGPSTAT2_4X) && (*vga_agpstat & AGPSTAT2_4X) && (*requested_mode & AGPSTAT2_4X))) | |
450 | *bridge_agpstat &= ~AGPSTAT2_4X; | |
451 | ||
452 | if (!((*bridge_agpstat & AGPSTAT2_2X) && (*vga_agpstat & AGPSTAT2_2X) && (*requested_mode & AGPSTAT2_2X))) | |
453 | *bridge_agpstat &= ~AGPSTAT2_2X; | |
454 | ||
455 | if (!((*bridge_agpstat & AGPSTAT2_1X) && (*vga_agpstat & AGPSTAT2_1X) && (*requested_mode & AGPSTAT2_1X))) | |
456 | *bridge_agpstat &= ~AGPSTAT2_1X; | |
457 | ||
458 | /* Now we know what mode it should be, clear out the unwanted bits. */ | |
459 | if (*bridge_agpstat & AGPSTAT2_4X) | |
460 | *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_2X); /* 4X */ | |
461 | ||
462 | if (*bridge_agpstat & AGPSTAT2_2X) | |
463 | *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_4X); /* 2X */ | |
464 | ||
465 | if (*bridge_agpstat & AGPSTAT2_1X) | |
466 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); /* 1X */ | |
467 | ||
468 | /* Apply any errata. */ | |
469 | if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) | |
470 | *bridge_agpstat &= ~AGPSTAT_FW; | |
471 | ||
472 | if (agp_bridge->flags & AGP_ERRATA_SBA) | |
473 | *bridge_agpstat &= ~AGPSTAT_SBA; | |
474 | ||
475 | if (agp_bridge->flags & AGP_ERRATA_1X) { | |
476 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); | |
477 | *bridge_agpstat |= AGPSTAT2_1X; | |
478 | } | |
479 | ||
480 | /* If we've dropped down to 1X, disable fast writes. */ | |
481 | if (*bridge_agpstat & AGPSTAT2_1X) | |
482 | *bridge_agpstat &= ~AGPSTAT_FW; | |
483 | } | |
484 | ||
485 | /* | |
486 | * requested_mode = Mode requested by (typically) X. | |
487 | * bridge_agpstat = PCI_AGP_STATUS from agp bridge. | |
488 | * vga_agpstat = PCI_AGP_STATUS from graphic card. | |
489 | */ | |
490 | static void agp_v3_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) | |
491 | { | |
492 | u32 origbridge=*bridge_agpstat, origvga=*vga_agpstat; | |
493 | u32 tmp; | |
494 | ||
495 | if (*requested_mode & AGP3_RESERVED_MASK) { | |
c4dd4582 DJ |
496 | printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
497 | *requested_mode & AGP3_RESERVED_MASK, *requested_mode); | |
1da177e4 LT |
498 | *requested_mode &= ~AGP3_RESERVED_MASK; |
499 | } | |
500 | ||
501 | /* Check the speed bits make sense. */ | |
502 | tmp = *requested_mode & 7; | |
503 | if (tmp == 0) { | |
8c8b8385 | 504 | printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to AGP3 x4 mode.\n", current->comm); |
1da177e4 LT |
505 | *requested_mode |= AGPSTAT3_4X; |
506 | } | |
507 | if (tmp >= 3) { | |
8c8b8385 | 508 | printk(KERN_INFO PFX "%s tried to set rate=x%d. Setting to AGP3 x8 mode.\n", current->comm, tmp * 4); |
1da177e4 LT |
509 | *requested_mode = (*requested_mode & ~7) | AGPSTAT3_8X; |
510 | } | |
511 | ||
512 | /* ARQSZ - Set the value to the maximum one. | |
513 | * Don't allow the mode register to override values. */ | |
514 | *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_ARQSZ) | | |
515 | max_t(u32,(*bridge_agpstat & AGPSTAT_ARQSZ),(*vga_agpstat & AGPSTAT_ARQSZ))); | |
516 | ||
517 | /* Calibration cycle. | |
518 | * Don't allow the mode register to override values. */ | |
519 | *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_CAL_MASK) | | |
520 | min_t(u32,(*bridge_agpstat & AGPSTAT_CAL_MASK),(*vga_agpstat & AGPSTAT_CAL_MASK))); | |
521 | ||
522 | /* SBA *must* be supported for AGP v3 */ | |
523 | *bridge_agpstat |= AGPSTAT_SBA; | |
524 | ||
525 | /* | |
526 | * Set speed. | |
527 | * Check for invalid speeds. This can happen when applications | |
528 | * written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware | |
529 | */ | |
530 | if (*requested_mode & AGPSTAT_MODE_3_0) { | |
531 | /* | |
532 | * Caller hasn't a clue what it is doing. Bridge is in 3.0 mode, | |
533 | * have been passed a 3.0 mode, but with 2.x speed bits set. | |
534 | * AGP2.x 4x -> AGP3.0 4x. | |
535 | */ | |
536 | if (*requested_mode & AGPSTAT2_4X) { | |
8c8b8385 | 537 | printk(KERN_INFO PFX "%s passes broken AGP3 flags (%x). Fixed.\n", |
1da177e4 LT |
538 | current->comm, *requested_mode); |
539 | *requested_mode &= ~AGPSTAT2_4X; | |
540 | *requested_mode |= AGPSTAT3_4X; | |
541 | } | |
542 | } else { | |
543 | /* | |
544 | * The caller doesn't know what they are doing. We are in 3.0 mode, | |
545 | * but have been passed an AGP 2.x mode. | |
546 | * Convert AGP 1x,2x,4x -> AGP 3.0 4x. | |
547 | */ | |
8c8b8385 | 548 | printk(KERN_INFO PFX "%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n", |
1da177e4 LT |
549 | current->comm, *requested_mode); |
550 | *requested_mode &= ~(AGPSTAT2_4X | AGPSTAT2_2X | AGPSTAT2_1X); | |
551 | *requested_mode |= AGPSTAT3_4X; | |
552 | } | |
553 | ||
554 | if (*requested_mode & AGPSTAT3_8X) { | |
555 | if (!(*bridge_agpstat & AGPSTAT3_8X)) { | |
556 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); | |
557 | *bridge_agpstat |= AGPSTAT3_4X; | |
8c8b8385 | 558 | printk(KERN_INFO PFX "%s requested AGPx8 but bridge not capable.\n", current->comm); |
1da177e4 LT |
559 | return; |
560 | } | |
561 | if (!(*vga_agpstat & AGPSTAT3_8X)) { | |
562 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); | |
563 | *bridge_agpstat |= AGPSTAT3_4X; | |
8c8b8385 | 564 | printk(KERN_INFO PFX "%s requested AGPx8 but graphic card not capable.\n", current->comm); |
1da177e4 LT |
565 | return; |
566 | } | |
567 | /* All set, bridge & device can do AGP x8*/ | |
568 | *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); | |
569 | goto done; | |
570 | ||
edf03fb0 DJ |
571 | } else if (*requested_mode & AGPSTAT3_4X) { |
572 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); | |
573 | *bridge_agpstat |= AGPSTAT3_4X; | |
574 | goto done; | |
575 | ||
1da177e4 LT |
576 | } else { |
577 | ||
578 | /* | |
edf03fb0 DJ |
579 | * If we didn't specify an AGP mode, we see if both |
580 | * the graphics card, and the bridge can do x8, and use if so. | |
581 | * If not, we fall back to x4 mode. | |
1da177e4 | 582 | */ |
edf03fb0 | 583 | if ((*bridge_agpstat & AGPSTAT3_8X) && (*vga_agpstat & AGPSTAT3_8X)) { |
2cc1a413 DJ |
584 | printk(KERN_INFO PFX "No AGP mode specified. Setting to highest mode " |
585 | "supported by bridge & card (x8).\n"); | |
edf03fb0 DJ |
586 | *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
587 | *vga_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); | |
588 | } else { | |
589 | printk(KERN_INFO PFX "Fell back to AGPx4 mode because"); | |
590 | if (!(*bridge_agpstat & AGPSTAT3_8X)) { | |
2cc1a413 DJ |
591 | printk(KERN_INFO PFX "bridge couldn't do x8. bridge_agpstat:%x (orig=%x)\n", |
592 | *bridge_agpstat, origbridge); | |
edf03fb0 DJ |
593 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
594 | *bridge_agpstat |= AGPSTAT3_4X; | |
595 | } | |
596 | if (!(*vga_agpstat & AGPSTAT3_8X)) { | |
2cc1a413 DJ |
597 | printk(KERN_INFO PFX "graphics card couldn't do x8. vga_agpstat:%x (orig=%x)\n", |
598 | *vga_agpstat, origvga); | |
edf03fb0 DJ |
599 | *vga_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
600 | *vga_agpstat |= AGPSTAT3_4X; | |
601 | } | |
1da177e4 LT |
602 | } |
603 | } | |
604 | ||
605 | done: | |
606 | /* Apply any errata. */ | |
607 | if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) | |
608 | *bridge_agpstat &= ~AGPSTAT_FW; | |
609 | ||
610 | if (agp_bridge->flags & AGP_ERRATA_SBA) | |
611 | *bridge_agpstat &= ~AGPSTAT_SBA; | |
612 | ||
613 | if (agp_bridge->flags & AGP_ERRATA_1X) { | |
614 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); | |
615 | *bridge_agpstat |= AGPSTAT2_1X; | |
616 | } | |
617 | } | |
618 | ||
619 | ||
620 | /** | |
621 | * agp_collect_device_status - determine correct agp_cmd from various agp_stat's | |
622 | * @bridge: an agp_bridge_data struct allocated for the AGP host bridge. | |
623 | * @requested_mode: requested agp_stat from userspace (Typically from X) | |
624 | * @bridge_agpstat: current agp_stat from AGP bridge. | |
625 | * | |
626 | * This function will hunt for an AGP graphics card, and try to match | |
627 | * the requested mode to the capabilities of both the bridge and the card. | |
628 | */ | |
629 | u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 requested_mode, u32 bridge_agpstat) | |
630 | { | |
631 | struct pci_dev *device = NULL; | |
632 | u32 vga_agpstat; | |
633 | u8 cap_ptr; | |
634 | ||
635 | for (;;) { | |
636 | device = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, device); | |
637 | if (!device) { | |
8c8b8385 | 638 | printk(KERN_INFO PFX "Couldn't find an AGP VGA controller.\n"); |
1da177e4 LT |
639 | return 0; |
640 | } | |
641 | cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP); | |
642 | if (cap_ptr) | |
643 | break; | |
644 | } | |
645 | ||
646 | /* | |
647 | * Ok, here we have a AGP device. Disable impossible | |
648 | * settings, and adjust the readqueue to the minimum. | |
649 | */ | |
650 | pci_read_config_dword(device, cap_ptr+PCI_AGP_STATUS, &vga_agpstat); | |
651 | ||
652 | /* adjust RQ depth */ | |
653 | bridge_agpstat = ((bridge_agpstat & ~AGPSTAT_RQ_DEPTH) | | |
654 | min_t(u32, (requested_mode & AGPSTAT_RQ_DEPTH), | |
655 | min_t(u32, (bridge_agpstat & AGPSTAT_RQ_DEPTH), (vga_agpstat & AGPSTAT_RQ_DEPTH)))); | |
656 | ||
657 | /* disable FW if it's not supported */ | |
658 | if (!((bridge_agpstat & AGPSTAT_FW) && | |
659 | (vga_agpstat & AGPSTAT_FW) && | |
660 | (requested_mode & AGPSTAT_FW))) | |
661 | bridge_agpstat &= ~AGPSTAT_FW; | |
662 | ||
663 | /* Check to see if we are operating in 3.0 mode */ | |
66bb8bf8 | 664 | if (agp_bridge->mode & AGPSTAT_MODE_3_0) |
1da177e4 LT |
665 | agp_v3_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); |
666 | else | |
667 | agp_v2_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); | |
668 | ||
669 | pci_dev_put(device); | |
670 | return bridge_agpstat; | |
671 | } | |
672 | EXPORT_SYMBOL(agp_collect_device_status); | |
673 | ||
674 | ||
675 | void agp_device_command(u32 bridge_agpstat, int agp_v3) | |
676 | { | |
677 | struct pci_dev *device = NULL; | |
678 | int mode; | |
679 | ||
680 | mode = bridge_agpstat & 0x7; | |
681 | if (agp_v3) | |
682 | mode *= 4; | |
683 | ||
684 | for_each_pci_dev(device) { | |
685 | u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP); | |
686 | if (!agp) | |
687 | continue; | |
688 | ||
689 | printk(KERN_INFO PFX "Putting AGP V%d device at %s into %dx mode\n", | |
690 | agp_v3 ? 3 : 2, pci_name(device), mode); | |
691 | pci_write_config_dword(device, agp + PCI_AGP_COMMAND, bridge_agpstat); | |
692 | } | |
693 | } | |
694 | EXPORT_SYMBOL(agp_device_command); | |
695 | ||
696 | ||
697 | void get_agp_version(struct agp_bridge_data *bridge) | |
698 | { | |
699 | u32 ncapid; | |
700 | ||
701 | /* Exit early if already set by errata workarounds. */ | |
702 | if (bridge->major_version != 0) | |
703 | return; | |
704 | ||
705 | pci_read_config_dword(bridge->dev, bridge->capndx, &ncapid); | |
706 | bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf; | |
707 | bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf; | |
708 | } | |
709 | EXPORT_SYMBOL(get_agp_version); | |
710 | ||
711 | ||
712 | void agp_generic_enable(struct agp_bridge_data *bridge, u32 requested_mode) | |
713 | { | |
714 | u32 bridge_agpstat, temp; | |
715 | ||
716 | get_agp_version(agp_bridge); | |
717 | ||
718 | printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n", | |
719 | agp_bridge->major_version, | |
720 | agp_bridge->minor_version, | |
721 | pci_name(agp_bridge->dev)); | |
722 | ||
723 | pci_read_config_dword(agp_bridge->dev, | |
724 | agp_bridge->capndx + PCI_AGP_STATUS, &bridge_agpstat); | |
725 | ||
726 | bridge_agpstat = agp_collect_device_status(agp_bridge, requested_mode, bridge_agpstat); | |
727 | if (bridge_agpstat == 0) | |
728 | /* Something bad happened. FIXME: Return error code? */ | |
729 | return; | |
730 | ||
731 | bridge_agpstat |= AGPSTAT_AGP_ENABLE; | |
732 | ||
733 | /* Do AGP version specific frobbing. */ | |
734 | if (bridge->major_version >= 3) { | |
66bb8bf8 | 735 | if (bridge->mode & AGPSTAT_MODE_3_0) { |
1da177e4 LT |
736 | /* If we have 3.5, we can do the isoch stuff. */ |
737 | if (bridge->minor_version >= 5) | |
738 | agp_3_5_enable(bridge); | |
739 | agp_device_command(bridge_agpstat, TRUE); | |
740 | return; | |
741 | } else { | |
742 | /* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/ | |
743 | bridge_agpstat &= ~(7<<10) ; | |
744 | pci_read_config_dword(bridge->dev, | |
745 | bridge->capndx+AGPCTRL, &temp); | |
746 | temp |= (1<<9); | |
747 | pci_write_config_dword(bridge->dev, | |
748 | bridge->capndx+AGPCTRL, temp); | |
749 | ||
8c8b8385 | 750 | printk(KERN_INFO PFX "Device is in legacy mode," |
1da177e4 LT |
751 | " falling back to 2.x\n"); |
752 | } | |
753 | } | |
754 | ||
755 | /* AGP v<3 */ | |
756 | agp_device_command(bridge_agpstat, FALSE); | |
757 | } | |
758 | EXPORT_SYMBOL(agp_generic_enable); | |
759 | ||
760 | ||
761 | int agp_generic_create_gatt_table(struct agp_bridge_data *bridge) | |
762 | { | |
763 | char *table; | |
764 | char *table_end; | |
765 | int size; | |
766 | int page_order; | |
767 | int num_entries; | |
768 | int i; | |
769 | void *temp; | |
770 | struct page *page; | |
771 | ||
772 | /* The generic routines can't handle 2 level gatt's */ | |
773 | if (bridge->driver->size_type == LVL2_APER_SIZE) | |
774 | return -EINVAL; | |
775 | ||
776 | table = NULL; | |
777 | i = bridge->aperture_size_idx; | |
778 | temp = bridge->current_size; | |
779 | size = page_order = num_entries = 0; | |
780 | ||
781 | if (bridge->driver->size_type != FIXED_APER_SIZE) { | |
782 | do { | |
783 | switch (bridge->driver->size_type) { | |
784 | case U8_APER_SIZE: | |
785 | size = A_SIZE_8(temp)->size; | |
786 | page_order = | |
787 | A_SIZE_8(temp)->page_order; | |
788 | num_entries = | |
789 | A_SIZE_8(temp)->num_entries; | |
790 | break; | |
791 | case U16_APER_SIZE: | |
792 | size = A_SIZE_16(temp)->size; | |
793 | page_order = A_SIZE_16(temp)->page_order; | |
794 | num_entries = A_SIZE_16(temp)->num_entries; | |
795 | break; | |
796 | case U32_APER_SIZE: | |
797 | size = A_SIZE_32(temp)->size; | |
798 | page_order = A_SIZE_32(temp)->page_order; | |
799 | num_entries = A_SIZE_32(temp)->num_entries; | |
800 | break; | |
801 | /* This case will never really happen. */ | |
802 | case FIXED_APER_SIZE: | |
803 | case LVL2_APER_SIZE: | |
804 | default: | |
805 | size = page_order = num_entries = 0; | |
806 | break; | |
807 | } | |
808 | ||
07eee78e | 809 | table = alloc_gatt_pages(page_order); |
1da177e4 LT |
810 | |
811 | if (table == NULL) { | |
812 | i++; | |
813 | switch (bridge->driver->size_type) { | |
814 | case U8_APER_SIZE: | |
815 | bridge->current_size = A_IDX8(bridge); | |
816 | break; | |
817 | case U16_APER_SIZE: | |
818 | bridge->current_size = A_IDX16(bridge); | |
819 | break; | |
820 | case U32_APER_SIZE: | |
821 | bridge->current_size = A_IDX32(bridge); | |
822 | break; | |
89197e34 | 823 | /* These cases will never really happen. */ |
1da177e4 LT |
824 | case FIXED_APER_SIZE: |
825 | case LVL2_APER_SIZE: | |
826 | default: | |
1da177e4 LT |
827 | break; |
828 | } | |
829 | temp = bridge->current_size; | |
830 | } else { | |
831 | bridge->aperture_size_idx = i; | |
832 | } | |
833 | } while (!table && (i < bridge->driver->num_aperture_sizes)); | |
834 | } else { | |
835 | size = ((struct aper_size_info_fixed *) temp)->size; | |
836 | page_order = ((struct aper_size_info_fixed *) temp)->page_order; | |
837 | num_entries = ((struct aper_size_info_fixed *) temp)->num_entries; | |
07eee78e | 838 | table = alloc_gatt_pages(page_order); |
1da177e4 LT |
839 | } |
840 | ||
841 | if (table == NULL) | |
842 | return -ENOMEM; | |
843 | ||
844 | table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); | |
845 | ||
846 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) | |
847 | SetPageReserved(page); | |
848 | ||
849 | bridge->gatt_table_real = (u32 *) table; | |
850 | agp_gatt_table = (void *)table; | |
851 | ||
852 | bridge->driver->cache_flush(); | |
07eee78e | 853 | bridge->gatt_table = ioremap_nocache(virt_to_gart(table), |
1da177e4 LT |
854 | (PAGE_SIZE * (1 << page_order))); |
855 | bridge->driver->cache_flush(); | |
856 | ||
857 | if (bridge->gatt_table == NULL) { | |
858 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) | |
859 | ClearPageReserved(page); | |
860 | ||
07eee78e | 861 | free_gatt_pages(table, page_order); |
1da177e4 LT |
862 | |
863 | return -ENOMEM; | |
864 | } | |
07eee78e | 865 | bridge->gatt_bus_addr = virt_to_gart(bridge->gatt_table_real); |
1da177e4 LT |
866 | |
867 | /* AK: bogus, should encode addresses > 4GB */ | |
868 | for (i = 0; i < num_entries; i++) { | |
869 | writel(bridge->scratch_page, bridge->gatt_table+i); | |
870 | readl(bridge->gatt_table+i); /* PCI Posting. */ | |
871 | } | |
872 | ||
873 | return 0; | |
874 | } | |
875 | EXPORT_SYMBOL(agp_generic_create_gatt_table); | |
876 | ||
877 | int agp_generic_free_gatt_table(struct agp_bridge_data *bridge) | |
878 | { | |
879 | int page_order; | |
880 | char *table, *table_end; | |
881 | void *temp; | |
882 | struct page *page; | |
883 | ||
884 | temp = bridge->current_size; | |
885 | ||
886 | switch (bridge->driver->size_type) { | |
887 | case U8_APER_SIZE: | |
888 | page_order = A_SIZE_8(temp)->page_order; | |
889 | break; | |
890 | case U16_APER_SIZE: | |
891 | page_order = A_SIZE_16(temp)->page_order; | |
892 | break; | |
893 | case U32_APER_SIZE: | |
894 | page_order = A_SIZE_32(temp)->page_order; | |
895 | break; | |
896 | case FIXED_APER_SIZE: | |
897 | page_order = A_SIZE_FIX(temp)->page_order; | |
898 | break; | |
899 | case LVL2_APER_SIZE: | |
900 | /* The generic routines can't deal with 2 level gatt's */ | |
901 | return -EINVAL; | |
902 | break; | |
903 | default: | |
904 | page_order = 0; | |
905 | break; | |
906 | } | |
907 | ||
908 | /* Do not worry about freeing memory, because if this is | |
909 | * called, then all agp memory is deallocated and removed | |
910 | * from the table. */ | |
911 | ||
912 | iounmap(bridge->gatt_table); | |
913 | table = (char *) bridge->gatt_table_real; | |
914 | table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); | |
915 | ||
916 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) | |
917 | ClearPageReserved(page); | |
918 | ||
07eee78e | 919 | free_gatt_pages(bridge->gatt_table_real, page_order); |
1da177e4 LT |
920 | |
921 | agp_gatt_table = NULL; | |
922 | bridge->gatt_table = NULL; | |
923 | bridge->gatt_table_real = NULL; | |
924 | bridge->gatt_bus_addr = 0; | |
925 | ||
926 | return 0; | |
927 | } | |
928 | EXPORT_SYMBOL(agp_generic_free_gatt_table); | |
929 | ||
930 | ||
931 | int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type) | |
932 | { | |
933 | int num_entries; | |
934 | size_t i; | |
935 | off_t j; | |
936 | void *temp; | |
937 | struct agp_bridge_data *bridge; | |
938 | ||
939 | bridge = mem->bridge; | |
940 | if (!bridge) | |
941 | return -EINVAL; | |
942 | ||
943 | temp = bridge->current_size; | |
944 | ||
945 | switch (bridge->driver->size_type) { | |
946 | case U8_APER_SIZE: | |
947 | num_entries = A_SIZE_8(temp)->num_entries; | |
948 | break; | |
949 | case U16_APER_SIZE: | |
950 | num_entries = A_SIZE_16(temp)->num_entries; | |
951 | break; | |
952 | case U32_APER_SIZE: | |
953 | num_entries = A_SIZE_32(temp)->num_entries; | |
954 | break; | |
955 | case FIXED_APER_SIZE: | |
956 | num_entries = A_SIZE_FIX(temp)->num_entries; | |
957 | break; | |
958 | case LVL2_APER_SIZE: | |
959 | /* The generic routines can't deal with 2 level gatt's */ | |
960 | return -EINVAL; | |
961 | break; | |
962 | default: | |
963 | num_entries = 0; | |
964 | break; | |
965 | } | |
966 | ||
967 | num_entries -= agp_memory_reserved/PAGE_SIZE; | |
968 | if (num_entries < 0) num_entries = 0; | |
969 | ||
970 | if (type != 0 || mem->type != 0) { | |
971 | /* The generic routines know nothing of memory types */ | |
972 | return -EINVAL; | |
973 | } | |
974 | ||
975 | /* AK: could wrap */ | |
976 | if ((pg_start + mem->page_count) > num_entries) | |
977 | return -EINVAL; | |
978 | ||
979 | j = pg_start; | |
980 | ||
981 | while (j < (pg_start + mem->page_count)) { | |
982 | if (!PGE_EMPTY(bridge, readl(bridge->gatt_table+j))) | |
983 | return -EBUSY; | |
984 | j++; | |
985 | } | |
986 | ||
987 | if (mem->is_flushed == FALSE) { | |
988 | bridge->driver->cache_flush(); | |
989 | mem->is_flushed = TRUE; | |
990 | } | |
991 | ||
992 | for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { | |
993 | writel(bridge->driver->mask_memory(bridge, mem->memory[i], mem->type), bridge->gatt_table+j); | |
994 | readl(bridge->gatt_table+j); /* PCI Posting. */ | |
995 | } | |
996 | ||
997 | bridge->driver->tlb_flush(mem); | |
998 | return 0; | |
999 | } | |
1000 | EXPORT_SYMBOL(agp_generic_insert_memory); | |
1001 | ||
1002 | ||
1003 | int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type) | |
1004 | { | |
1005 | size_t i; | |
1006 | struct agp_bridge_data *bridge; | |
1007 | ||
1008 | bridge = mem->bridge; | |
1009 | if (!bridge) | |
1010 | return -EINVAL; | |
1011 | ||
1012 | if (type != 0 || mem->type != 0) { | |
1013 | /* The generic routines know nothing of memory types */ | |
1014 | return -EINVAL; | |
1015 | } | |
1016 | ||
1017 | /* AK: bogus, should encode addresses > 4GB */ | |
1018 | for (i = pg_start; i < (mem->page_count + pg_start); i++) { | |
1019 | writel(bridge->scratch_page, bridge->gatt_table+i); | |
1020 | readl(bridge->gatt_table+i); /* PCI Posting. */ | |
1021 | } | |
1022 | ||
1023 | global_cache_flush(); | |
1024 | bridge->driver->tlb_flush(mem); | |
1025 | return 0; | |
1026 | } | |
1027 | EXPORT_SYMBOL(agp_generic_remove_memory); | |
1028 | ||
1029 | ||
1030 | struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type) | |
1031 | { | |
1032 | return NULL; | |
1033 | } | |
1034 | EXPORT_SYMBOL(agp_generic_alloc_by_type); | |
1035 | ||
1036 | ||
1037 | void agp_generic_free_by_type(struct agp_memory *curr) | |
1038 | { | |
1039 | vfree(curr->memory); | |
1040 | agp_free_key(curr->key); | |
1041 | kfree(curr); | |
1042 | } | |
1043 | EXPORT_SYMBOL(agp_generic_free_by_type); | |
1044 | ||
1045 | ||
1046 | /* | |
1047 | * Basic Page Allocation Routines - | |
1048 | * These routines handle page allocation and by default they reserve the allocated | |
1049 | * memory. They also handle incrementing the current_memory_agp value, Which is checked | |
1050 | * against a maximum value. | |
1051 | */ | |
1052 | ||
1053 | void *agp_generic_alloc_page(struct agp_bridge_data *bridge) | |
1054 | { | |
1055 | struct page * page; | |
1056 | ||
1057 | page = alloc_page(GFP_KERNEL); | |
1058 | if (page == NULL) | |
1059 | return NULL; | |
1060 | ||
1061 | map_page_into_agp(page); | |
1062 | ||
1063 | get_page(page); | |
1064 | SetPageLocked(page); | |
1065 | atomic_inc(&agp_bridge->current_memory_agp); | |
1066 | return page_address(page); | |
1067 | } | |
1068 | EXPORT_SYMBOL(agp_generic_alloc_page); | |
1069 | ||
1070 | ||
1071 | void agp_generic_destroy_page(void *addr) | |
1072 | { | |
1073 | struct page *page; | |
1074 | ||
1075 | if (addr == NULL) | |
1076 | return; | |
1077 | ||
1078 | page = virt_to_page(addr); | |
1079 | unmap_page_from_agp(page); | |
1080 | put_page(page); | |
1081 | unlock_page(page); | |
1082 | free_page((unsigned long)addr); | |
1083 | atomic_dec(&agp_bridge->current_memory_agp); | |
1084 | } | |
1085 | EXPORT_SYMBOL(agp_generic_destroy_page); | |
1086 | ||
1087 | /* End Basic Page Allocation Routines */ | |
1088 | ||
1089 | ||
1090 | /** | |
1091 | * agp_enable - initialise the agp point-to-point connection. | |
1092 | * | |
1093 | * @mode: agp mode register value to configure with. | |
1094 | */ | |
1095 | void agp_enable(struct agp_bridge_data *bridge, u32 mode) | |
1096 | { | |
1097 | if (!bridge) | |
1098 | return; | |
1099 | bridge->driver->agp_enable(bridge, mode); | |
1100 | } | |
1101 | EXPORT_SYMBOL(agp_enable); | |
1102 | ||
1103 | /* When we remove the global variable agp_bridge from all drivers | |
1104 | * then agp_alloc_bridge and agp_generic_find_bridge need to be updated | |
1105 | */ | |
1106 | ||
1107 | struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev) | |
1108 | { | |
1109 | if (list_empty(&agp_bridges)) | |
1110 | return NULL; | |
1111 | ||
1112 | return agp_bridge; | |
1113 | } | |
1114 | ||
1115 | static void ipi_handler(void *null) | |
1116 | { | |
1117 | flush_agp_cache(); | |
1118 | } | |
1119 | ||
1120 | void global_cache_flush(void) | |
1121 | { | |
1122 | if (on_each_cpu(ipi_handler, NULL, 1, 1) != 0) | |
1123 | panic(PFX "timed out waiting for the other CPUs!\n"); | |
1124 | } | |
1125 | EXPORT_SYMBOL(global_cache_flush); | |
1126 | ||
1127 | unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge, | |
1128 | unsigned long addr, int type) | |
1129 | { | |
1130 | /* memory type is ignored in the generic routine */ | |
1131 | if (bridge->driver->masks) | |
1132 | return addr | bridge->driver->masks[0].mask; | |
1133 | else | |
1134 | return addr; | |
1135 | } | |
1136 | EXPORT_SYMBOL(agp_generic_mask_memory); | |
1137 | ||
1138 | /* | |
1139 | * These functions are implemented according to the AGPv3 spec, | |
1140 | * which covers implementation details that had previously been | |
1141 | * left open. | |
1142 | */ | |
1143 | ||
1144 | int agp3_generic_fetch_size(void) | |
1145 | { | |
1146 | u16 temp_size; | |
1147 | int i; | |
1148 | struct aper_size_info_16 *values; | |
1149 | ||
1150 | pci_read_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, &temp_size); | |
1151 | values = A_SIZE_16(agp_bridge->driver->aperture_sizes); | |
1152 | ||
1153 | for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { | |
1154 | if (temp_size == values[i].size_value) { | |
1155 | agp_bridge->previous_size = | |
1156 | agp_bridge->current_size = (void *) (values + i); | |
1157 | ||
1158 | agp_bridge->aperture_size_idx = i; | |
1159 | return values[i].size; | |
1160 | } | |
1161 | } | |
1162 | return 0; | |
1163 | } | |
1164 | EXPORT_SYMBOL(agp3_generic_fetch_size); | |
1165 | ||
1166 | void agp3_generic_tlbflush(struct agp_memory *mem) | |
1167 | { | |
1168 | u32 ctrl; | |
1169 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); | |
1170 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_GTLBEN); | |
1171 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl); | |
1172 | } | |
1173 | EXPORT_SYMBOL(agp3_generic_tlbflush); | |
1174 | ||
1175 | int agp3_generic_configure(void) | |
1176 | { | |
1177 | u32 temp; | |
1178 | struct aper_size_info_16 *current_size; | |
1179 | ||
1180 | current_size = A_SIZE_16(agp_bridge->current_size); | |
1181 | ||
1182 | pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); | |
1183 | agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); | |
1184 | ||
1185 | /* set aperture size */ | |
1186 | pci_write_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, current_size->size_value); | |
1187 | /* set gart pointer */ | |
1188 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPGARTLO, agp_bridge->gatt_bus_addr); | |
1189 | /* enable aperture and GTLB */ | |
1190 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &temp); | |
1191 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, temp | AGPCTRL_APERENB | AGPCTRL_GTLBEN); | |
1192 | return 0; | |
1193 | } | |
1194 | EXPORT_SYMBOL(agp3_generic_configure); | |
1195 | ||
1196 | void agp3_generic_cleanup(void) | |
1197 | { | |
1198 | u32 ctrl; | |
1199 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); | |
1200 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_APERENB); | |
1201 | } | |
1202 | EXPORT_SYMBOL(agp3_generic_cleanup); | |
1203 | ||
1204 | struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] = | |
1205 | { | |
1206 | {4096, 1048576, 10,0x000}, | |
1207 | {2048, 524288, 9, 0x800}, | |
1208 | {1024, 262144, 8, 0xc00}, | |
1209 | { 512, 131072, 7, 0xe00}, | |
1210 | { 256, 65536, 6, 0xf00}, | |
1211 | { 128, 32768, 5, 0xf20}, | |
1212 | { 64, 16384, 4, 0xf30}, | |
1213 | { 32, 8192, 3, 0xf38}, | |
1214 | { 16, 4096, 2, 0xf3c}, | |
1215 | { 8, 2048, 1, 0xf3e}, | |
1216 | { 4, 1024, 0, 0xf3f} | |
1217 | }; | |
1218 | EXPORT_SYMBOL(agp3_generic_sizes); | |
1219 |