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intel-gtt: adjust overhead entries in intel_gtt_stolen_entries
[deliverable/linux.git] / drivers / char / agp / intel-gtt.c
1 /*
2 * Intel GTT (Graphics Translation Table) routines
3 *
4 * Caveat: This driver implements the linux agp interface, but this is far from
5 * a agp driver! GTT support ended up here for purely historical reasons: The
6 * old userspace intel graphics drivers needed an interface to map memory into
7 * the GTT. And the drm provides a default interface for graphic devices sitting
8 * on an agp port. So it made sense to fake the GTT support as an agp port to
9 * avoid having to create a new api.
10 *
11 * With gem this does not make much sense anymore, just needlessly complicates
12 * the code. But as long as the old graphics stack is still support, it's stuck
13 * here.
14 *
15 * /fairy-tale-mode off
16 */
17
18 #include <linux/module.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/pagemap.h>
23 #include <linux/agp_backend.h>
24 #include <asm/smp.h>
25 #include "agp.h"
26 #include "intel-agp.h"
27 #include <linux/intel-gtt.h>
28 #include <drm/intel-gtt.h>
29
30 /*
31 * If we have Intel graphics, we're not going to have anything other than
32 * an Intel IOMMU. So make the correct use of the PCI DMA API contingent
33 * on the Intel IOMMU support (CONFIG_DMAR).
34 * Only newer chipsets need to bother with this, of course.
35 */
36 #ifdef CONFIG_DMAR
37 #define USE_PCI_DMA_API 1
38 #endif
39
40 /* Max amount of stolen space, anything above will be returned to Linux */
41 int intel_max_stolen = 32 * 1024 * 1024;
42 EXPORT_SYMBOL(intel_max_stolen);
43
44 static const struct aper_size_info_fixed intel_i810_sizes[] =
45 {
46 {64, 16384, 4},
47 /* The 32M mode still requires a 64k gatt */
48 {32, 8192, 4}
49 };
50
51 #define AGP_DCACHE_MEMORY 1
52 #define AGP_PHYS_MEMORY 2
53 #define INTEL_AGP_CACHED_MEMORY 3
54
55 static struct gatt_mask intel_i810_masks[] =
56 {
57 {.mask = I810_PTE_VALID, .type = 0},
58 {.mask = (I810_PTE_VALID | I810_PTE_LOCAL), .type = AGP_DCACHE_MEMORY},
59 {.mask = I810_PTE_VALID, .type = 0},
60 {.mask = I810_PTE_VALID | I830_PTE_SYSTEM_CACHED,
61 .type = INTEL_AGP_CACHED_MEMORY}
62 };
63
64 #define INTEL_AGP_UNCACHED_MEMORY 0
65 #define INTEL_AGP_CACHED_MEMORY_LLC 1
66 #define INTEL_AGP_CACHED_MEMORY_LLC_GFDT 2
67 #define INTEL_AGP_CACHED_MEMORY_LLC_MLC 3
68 #define INTEL_AGP_CACHED_MEMORY_LLC_MLC_GFDT 4
69
70 static struct gatt_mask intel_gen6_masks[] =
71 {
72 {.mask = I810_PTE_VALID | GEN6_PTE_UNCACHED,
73 .type = INTEL_AGP_UNCACHED_MEMORY },
74 {.mask = I810_PTE_VALID | GEN6_PTE_LLC,
75 .type = INTEL_AGP_CACHED_MEMORY_LLC },
76 {.mask = I810_PTE_VALID | GEN6_PTE_LLC | GEN6_PTE_GFDT,
77 .type = INTEL_AGP_CACHED_MEMORY_LLC_GFDT },
78 {.mask = I810_PTE_VALID | GEN6_PTE_LLC_MLC,
79 .type = INTEL_AGP_CACHED_MEMORY_LLC_MLC },
80 {.mask = I810_PTE_VALID | GEN6_PTE_LLC_MLC | GEN6_PTE_GFDT,
81 .type = INTEL_AGP_CACHED_MEMORY_LLC_MLC_GFDT },
82 };
83
84 static struct _intel_private {
85 struct intel_gtt base;
86 struct pci_dev *pcidev; /* device one */
87 struct pci_dev *bridge_dev;
88 u8 __iomem *registers;
89 u32 __iomem *gtt; /* I915G */
90 int num_dcache_entries;
91 union {
92 void __iomem *i9xx_flush_page;
93 void *i8xx_flush_page;
94 };
95 struct page *i8xx_page;
96 struct resource ifp_resource;
97 int resource_valid;
98 } intel_private;
99
100 #ifdef USE_PCI_DMA_API
101 static int intel_agp_map_page(struct page *page, dma_addr_t *ret)
102 {
103 *ret = pci_map_page(intel_private.pcidev, page, 0,
104 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
105 if (pci_dma_mapping_error(intel_private.pcidev, *ret))
106 return -EINVAL;
107 return 0;
108 }
109
110 static void intel_agp_unmap_page(struct page *page, dma_addr_t dma)
111 {
112 pci_unmap_page(intel_private.pcidev, dma,
113 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
114 }
115
116 static void intel_agp_free_sglist(struct agp_memory *mem)
117 {
118 struct sg_table st;
119
120 st.sgl = mem->sg_list;
121 st.orig_nents = st.nents = mem->page_count;
122
123 sg_free_table(&st);
124
125 mem->sg_list = NULL;
126 mem->num_sg = 0;
127 }
128
129 static int intel_agp_map_memory(struct agp_memory *mem)
130 {
131 struct sg_table st;
132 struct scatterlist *sg;
133 int i;
134
135 DBG("try mapping %lu pages\n", (unsigned long)mem->page_count);
136
137 if (sg_alloc_table(&st, mem->page_count, GFP_KERNEL))
138 goto err;
139
140 mem->sg_list = sg = st.sgl;
141
142 for (i = 0 ; i < mem->page_count; i++, sg = sg_next(sg))
143 sg_set_page(sg, mem->pages[i], PAGE_SIZE, 0);
144
145 mem->num_sg = pci_map_sg(intel_private.pcidev, mem->sg_list,
146 mem->page_count, PCI_DMA_BIDIRECTIONAL);
147 if (unlikely(!mem->num_sg))
148 goto err;
149
150 return 0;
151
152 err:
153 sg_free_table(&st);
154 return -ENOMEM;
155 }
156
157 static void intel_agp_unmap_memory(struct agp_memory *mem)
158 {
159 DBG("try unmapping %lu pages\n", (unsigned long)mem->page_count);
160
161 pci_unmap_sg(intel_private.pcidev, mem->sg_list,
162 mem->page_count, PCI_DMA_BIDIRECTIONAL);
163 intel_agp_free_sglist(mem);
164 }
165
166 static void intel_agp_insert_sg_entries(struct agp_memory *mem,
167 off_t pg_start, int mask_type)
168 {
169 struct scatterlist *sg;
170 int i, j;
171
172 j = pg_start;
173
174 WARN_ON(!mem->num_sg);
175
176 if (mem->num_sg == mem->page_count) {
177 for_each_sg(mem->sg_list, sg, mem->page_count, i) {
178 writel(agp_bridge->driver->mask_memory(agp_bridge,
179 sg_dma_address(sg), mask_type),
180 intel_private.gtt+j);
181 j++;
182 }
183 } else {
184 /* sg may merge pages, but we have to separate
185 * per-page addr for GTT */
186 unsigned int len, m;
187
188 for_each_sg(mem->sg_list, sg, mem->num_sg, i) {
189 len = sg_dma_len(sg) / PAGE_SIZE;
190 for (m = 0; m < len; m++) {
191 writel(agp_bridge->driver->mask_memory(agp_bridge,
192 sg_dma_address(sg) + m * PAGE_SIZE,
193 mask_type),
194 intel_private.gtt+j);
195 j++;
196 }
197 }
198 }
199 readl(intel_private.gtt+j-1);
200 }
201
202 #else
203
204 static void intel_agp_insert_sg_entries(struct agp_memory *mem,
205 off_t pg_start, int mask_type)
206 {
207 int i, j;
208
209 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
210 writel(agp_bridge->driver->mask_memory(agp_bridge,
211 page_to_phys(mem->pages[i]), mask_type),
212 intel_private.gtt+j);
213 }
214
215 readl(intel_private.gtt+j-1);
216 }
217
218 #endif
219
220 static int intel_i810_fetch_size(void)
221 {
222 u32 smram_miscc;
223 struct aper_size_info_fixed *values;
224
225 pci_read_config_dword(intel_private.bridge_dev,
226 I810_SMRAM_MISCC, &smram_miscc);
227 values = A_SIZE_FIX(agp_bridge->driver->aperture_sizes);
228
229 if ((smram_miscc & I810_GMS) == I810_GMS_DISABLE) {
230 dev_warn(&intel_private.bridge_dev->dev, "i810 is disabled\n");
231 return 0;
232 }
233 if ((smram_miscc & I810_GFX_MEM_WIN_SIZE) == I810_GFX_MEM_WIN_32M) {
234 agp_bridge->current_size = (void *) (values + 1);
235 agp_bridge->aperture_size_idx = 1;
236 return values[1].size;
237 } else {
238 agp_bridge->current_size = (void *) (values);
239 agp_bridge->aperture_size_idx = 0;
240 return values[0].size;
241 }
242
243 return 0;
244 }
245
246 static int intel_i810_configure(void)
247 {
248 struct aper_size_info_fixed *current_size;
249 u32 temp;
250 int i;
251
252 current_size = A_SIZE_FIX(agp_bridge->current_size);
253
254 if (!intel_private.registers) {
255 pci_read_config_dword(intel_private.pcidev, I810_MMADDR, &temp);
256 temp &= 0xfff80000;
257
258 intel_private.registers = ioremap(temp, 128 * 4096);
259 if (!intel_private.registers) {
260 dev_err(&intel_private.pcidev->dev,
261 "can't remap memory\n");
262 return -ENOMEM;
263 }
264 }
265
266 if ((readl(intel_private.registers+I810_DRAM_CTL)
267 & I810_DRAM_ROW_0) == I810_DRAM_ROW_0_SDRAM) {
268 /* This will need to be dynamically assigned */
269 dev_info(&intel_private.pcidev->dev,
270 "detected 4MB dedicated video ram\n");
271 intel_private.num_dcache_entries = 1024;
272 }
273 pci_read_config_dword(intel_private.pcidev, I810_GMADDR, &temp);
274 agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
275 writel(agp_bridge->gatt_bus_addr | I810_PGETBL_ENABLED, intel_private.registers+I810_PGETBL_CTL);
276 readl(intel_private.registers+I810_PGETBL_CTL); /* PCI Posting. */
277
278 if (agp_bridge->driver->needs_scratch_page) {
279 for (i = 0; i < current_size->num_entries; i++) {
280 writel(agp_bridge->scratch_page, intel_private.registers+I810_PTE_BASE+(i*4));
281 }
282 readl(intel_private.registers+I810_PTE_BASE+((i-1)*4)); /* PCI posting. */
283 }
284 global_cache_flush();
285 return 0;
286 }
287
288 static void intel_i810_cleanup(void)
289 {
290 writel(0, intel_private.registers+I810_PGETBL_CTL);
291 readl(intel_private.registers); /* PCI Posting. */
292 iounmap(intel_private.registers);
293 }
294
295 static void intel_i810_agp_enable(struct agp_bridge_data *bridge, u32 mode)
296 {
297 return;
298 }
299
300 /* Exists to support ARGB cursors */
301 static struct page *i8xx_alloc_pages(void)
302 {
303 struct page *page;
304
305 page = alloc_pages(GFP_KERNEL | GFP_DMA32, 2);
306 if (page == NULL)
307 return NULL;
308
309 if (set_pages_uc(page, 4) < 0) {
310 set_pages_wb(page, 4);
311 __free_pages(page, 2);
312 return NULL;
313 }
314 get_page(page);
315 atomic_inc(&agp_bridge->current_memory_agp);
316 return page;
317 }
318
319 static void i8xx_destroy_pages(struct page *page)
320 {
321 if (page == NULL)
322 return;
323
324 set_pages_wb(page, 4);
325 put_page(page);
326 __free_pages(page, 2);
327 atomic_dec(&agp_bridge->current_memory_agp);
328 }
329
330 static int intel_i830_type_to_mask_type(struct agp_bridge_data *bridge,
331 int type)
332 {
333 if (type < AGP_USER_TYPES)
334 return type;
335 else if (type == AGP_USER_CACHED_MEMORY)
336 return INTEL_AGP_CACHED_MEMORY;
337 else
338 return 0;
339 }
340
341 static int intel_gen6_type_to_mask_type(struct agp_bridge_data *bridge,
342 int type)
343 {
344 unsigned int type_mask = type & ~AGP_USER_CACHED_MEMORY_GFDT;
345 unsigned int gfdt = type & AGP_USER_CACHED_MEMORY_GFDT;
346
347 if (type_mask == AGP_USER_UNCACHED_MEMORY)
348 return INTEL_AGP_UNCACHED_MEMORY;
349 else if (type_mask == AGP_USER_CACHED_MEMORY_LLC_MLC)
350 return gfdt ? INTEL_AGP_CACHED_MEMORY_LLC_MLC_GFDT :
351 INTEL_AGP_CACHED_MEMORY_LLC_MLC;
352 else /* set 'normal'/'cached' to LLC by default */
353 return gfdt ? INTEL_AGP_CACHED_MEMORY_LLC_GFDT :
354 INTEL_AGP_CACHED_MEMORY_LLC;
355 }
356
357
358 static int intel_i810_insert_entries(struct agp_memory *mem, off_t pg_start,
359 int type)
360 {
361 int i, j, num_entries;
362 void *temp;
363 int ret = -EINVAL;
364 int mask_type;
365
366 if (mem->page_count == 0)
367 goto out;
368
369 temp = agp_bridge->current_size;
370 num_entries = A_SIZE_FIX(temp)->num_entries;
371
372 if ((pg_start + mem->page_count) > num_entries)
373 goto out_err;
374
375
376 for (j = pg_start; j < (pg_start + mem->page_count); j++) {
377 if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+j))) {
378 ret = -EBUSY;
379 goto out_err;
380 }
381 }
382
383 if (type != mem->type)
384 goto out_err;
385
386 mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type);
387
388 switch (mask_type) {
389 case AGP_DCACHE_MEMORY:
390 if (!mem->is_flushed)
391 global_cache_flush();
392 for (i = pg_start; i < (pg_start + mem->page_count); i++) {
393 writel((i*4096)|I810_PTE_LOCAL|I810_PTE_VALID,
394 intel_private.registers+I810_PTE_BASE+(i*4));
395 }
396 readl(intel_private.registers+I810_PTE_BASE+((i-1)*4));
397 break;
398 case AGP_PHYS_MEMORY:
399 case AGP_NORMAL_MEMORY:
400 if (!mem->is_flushed)
401 global_cache_flush();
402 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
403 writel(agp_bridge->driver->mask_memory(agp_bridge,
404 page_to_phys(mem->pages[i]), mask_type),
405 intel_private.registers+I810_PTE_BASE+(j*4));
406 }
407 readl(intel_private.registers+I810_PTE_BASE+((j-1)*4));
408 break;
409 default:
410 goto out_err;
411 }
412
413 out:
414 ret = 0;
415 out_err:
416 mem->is_flushed = true;
417 return ret;
418 }
419
420 static int intel_i810_remove_entries(struct agp_memory *mem, off_t pg_start,
421 int type)
422 {
423 int i;
424
425 if (mem->page_count == 0)
426 return 0;
427
428 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
429 writel(agp_bridge->scratch_page, intel_private.registers+I810_PTE_BASE+(i*4));
430 }
431 readl(intel_private.registers+I810_PTE_BASE+((i-1)*4));
432
433 return 0;
434 }
435
436 /*
437 * The i810/i830 requires a physical address to program its mouse
438 * pointer into hardware.
439 * However the Xserver still writes to it through the agp aperture.
440 */
441 static struct agp_memory *alloc_agpphysmem_i8xx(size_t pg_count, int type)
442 {
443 struct agp_memory *new;
444 struct page *page;
445
446 switch (pg_count) {
447 case 1: page = agp_bridge->driver->agp_alloc_page(agp_bridge);
448 break;
449 case 4:
450 /* kludge to get 4 physical pages for ARGB cursor */
451 page = i8xx_alloc_pages();
452 break;
453 default:
454 return NULL;
455 }
456
457 if (page == NULL)
458 return NULL;
459
460 new = agp_create_memory(pg_count);
461 if (new == NULL)
462 return NULL;
463
464 new->pages[0] = page;
465 if (pg_count == 4) {
466 /* kludge to get 4 physical pages for ARGB cursor */
467 new->pages[1] = new->pages[0] + 1;
468 new->pages[2] = new->pages[1] + 1;
469 new->pages[3] = new->pages[2] + 1;
470 }
471 new->page_count = pg_count;
472 new->num_scratch_pages = pg_count;
473 new->type = AGP_PHYS_MEMORY;
474 new->physical = page_to_phys(new->pages[0]);
475 return new;
476 }
477
478 static struct agp_memory *intel_i810_alloc_by_type(size_t pg_count, int type)
479 {
480 struct agp_memory *new;
481
482 if (type == AGP_DCACHE_MEMORY) {
483 if (pg_count != intel_private.num_dcache_entries)
484 return NULL;
485
486 new = agp_create_memory(1);
487 if (new == NULL)
488 return NULL;
489
490 new->type = AGP_DCACHE_MEMORY;
491 new->page_count = pg_count;
492 new->num_scratch_pages = 0;
493 agp_free_page_array(new);
494 return new;
495 }
496 if (type == AGP_PHYS_MEMORY)
497 return alloc_agpphysmem_i8xx(pg_count, type);
498 return NULL;
499 }
500
501 static void intel_i810_free_by_type(struct agp_memory *curr)
502 {
503 agp_free_key(curr->key);
504 if (curr->type == AGP_PHYS_MEMORY) {
505 if (curr->page_count == 4)
506 i8xx_destroy_pages(curr->pages[0]);
507 else {
508 agp_bridge->driver->agp_destroy_page(curr->pages[0],
509 AGP_PAGE_DESTROY_UNMAP);
510 agp_bridge->driver->agp_destroy_page(curr->pages[0],
511 AGP_PAGE_DESTROY_FREE);
512 }
513 agp_free_page_array(curr);
514 }
515 kfree(curr);
516 }
517
518 static unsigned long intel_i810_mask_memory(struct agp_bridge_data *bridge,
519 dma_addr_t addr, int type)
520 {
521 /* Type checking must be done elsewhere */
522 return addr | bridge->driver->masks[type].mask;
523 }
524
525 static struct aper_size_info_fixed intel_i830_sizes[] =
526 {
527 {128, 32768, 5},
528 /* The 64M mode still requires a 128k gatt */
529 {64, 16384, 5},
530 {256, 65536, 6},
531 {512, 131072, 7},
532 };
533
534 static unsigned int intel_gtt_stolen_entries(void)
535 {
536 u16 gmch_ctrl;
537 u8 rdct;
538 int local = 0;
539 static const int ddt[4] = { 0, 16, 32, 64 };
540 unsigned int overhead_entries, stolen_entries;
541 unsigned int stolen_size = 0;
542
543 pci_read_config_word(intel_private.bridge_dev,
544 I830_GMCH_CTRL, &gmch_ctrl);
545
546 if (IS_G4X || IS_PINEVIEW)
547 overhead_entries = 0;
548 else
549 overhead_entries = intel_private.base.gtt_mappable_entries
550 / 1024;
551
552 overhead_entries += 1; /* BIOS popup */
553
554 if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB ||
555 intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) {
556 switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
557 case I830_GMCH_GMS_STOLEN_512:
558 stolen_size = KB(512);
559 break;
560 case I830_GMCH_GMS_STOLEN_1024:
561 stolen_size = MB(1);
562 break;
563 case I830_GMCH_GMS_STOLEN_8192:
564 stolen_size = MB(8);
565 break;
566 case I830_GMCH_GMS_LOCAL:
567 rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE);
568 stolen_size = (I830_RDRAM_ND(rdct) + 1) *
569 MB(ddt[I830_RDRAM_DDT(rdct)]);
570 local = 1;
571 break;
572 default:
573 stolen_size = 0;
574 break;
575 }
576 } else if (IS_SNB) {
577 /*
578 * SandyBridge has new memory control reg at 0x50.w
579 */
580 u16 snb_gmch_ctl;
581 pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);
582 switch (snb_gmch_ctl & SNB_GMCH_GMS_STOLEN_MASK) {
583 case SNB_GMCH_GMS_STOLEN_32M:
584 stolen_size = MB(32);
585 break;
586 case SNB_GMCH_GMS_STOLEN_64M:
587 stolen_size = MB(64);
588 break;
589 case SNB_GMCH_GMS_STOLEN_96M:
590 stolen_size = MB(96);
591 break;
592 case SNB_GMCH_GMS_STOLEN_128M:
593 stolen_size = MB(128);
594 break;
595 case SNB_GMCH_GMS_STOLEN_160M:
596 stolen_size = MB(160);
597 break;
598 case SNB_GMCH_GMS_STOLEN_192M:
599 stolen_size = MB(192);
600 break;
601 case SNB_GMCH_GMS_STOLEN_224M:
602 stolen_size = MB(224);
603 break;
604 case SNB_GMCH_GMS_STOLEN_256M:
605 stolen_size = MB(256);
606 break;
607 case SNB_GMCH_GMS_STOLEN_288M:
608 stolen_size = MB(288);
609 break;
610 case SNB_GMCH_GMS_STOLEN_320M:
611 stolen_size = MB(320);
612 break;
613 case SNB_GMCH_GMS_STOLEN_352M:
614 stolen_size = MB(352);
615 break;
616 case SNB_GMCH_GMS_STOLEN_384M:
617 stolen_size = MB(384);
618 break;
619 case SNB_GMCH_GMS_STOLEN_416M:
620 stolen_size = MB(416);
621 break;
622 case SNB_GMCH_GMS_STOLEN_448M:
623 stolen_size = MB(448);
624 break;
625 case SNB_GMCH_GMS_STOLEN_480M:
626 stolen_size = MB(480);
627 break;
628 case SNB_GMCH_GMS_STOLEN_512M:
629 stolen_size = MB(512);
630 break;
631 }
632 } else {
633 switch (gmch_ctrl & I855_GMCH_GMS_MASK) {
634 case I855_GMCH_GMS_STOLEN_1M:
635 stolen_size = MB(1);
636 break;
637 case I855_GMCH_GMS_STOLEN_4M:
638 stolen_size = MB(4);
639 break;
640 case I855_GMCH_GMS_STOLEN_8M:
641 stolen_size = MB(8);
642 break;
643 case I855_GMCH_GMS_STOLEN_16M:
644 stolen_size = MB(16);
645 break;
646 case I855_GMCH_GMS_STOLEN_32M:
647 stolen_size = MB(32);
648 break;
649 case I915_GMCH_GMS_STOLEN_48M:
650 stolen_size = MB(48);
651 break;
652 case I915_GMCH_GMS_STOLEN_64M:
653 stolen_size = MB(64);
654 break;
655 case G33_GMCH_GMS_STOLEN_128M:
656 stolen_size = MB(128);
657 break;
658 case G33_GMCH_GMS_STOLEN_256M:
659 stolen_size = MB(256);
660 break;
661 case INTEL_GMCH_GMS_STOLEN_96M:
662 stolen_size = MB(96);
663 break;
664 case INTEL_GMCH_GMS_STOLEN_160M:
665 stolen_size = MB(160);
666 break;
667 case INTEL_GMCH_GMS_STOLEN_224M:
668 stolen_size = MB(224);
669 break;
670 case INTEL_GMCH_GMS_STOLEN_352M:
671 stolen_size = MB(352);
672 break;
673 default:
674 stolen_size = 0;
675 break;
676 }
677 }
678
679 if (!local && stolen_size > intel_max_stolen) {
680 dev_info(&intel_private.bridge_dev->dev,
681 "detected %dK stolen memory, trimming to %dK\n",
682 stolen_size / KB(1), intel_max_stolen / KB(1));
683 stolen_size = intel_max_stolen;
684 } else if (stolen_size > 0) {
685 dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n",
686 stolen_size / KB(1), local ? "local" : "stolen");
687 } else {
688 dev_info(&intel_private.bridge_dev->dev,
689 "no pre-allocated video memory detected\n");
690 stolen_size = 0;
691 }
692
693 stolen_entries = stolen_size/KB(4) - overhead_entries;
694
695 return stolen_entries;
696 }
697
698 #if 0 /* extracted code in bad shape, needs some cleaning before use */
699 static unsigned int intel_gtt_total_entries(void)
700 {
701 int size;
702 u16 gmch_ctrl;
703
704 if (IS_I965) {
705 u32 pgetbl_ctl;
706 pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL);
707
708 /* The 965 has a field telling us the size of the GTT,
709 * which may be larger than what is necessary to map the
710 * aperture.
711 */
712 switch (pgetbl_ctl & I965_PGETBL_SIZE_MASK) {
713 case I965_PGETBL_SIZE_128KB:
714 size = 128;
715 break;
716 case I965_PGETBL_SIZE_256KB:
717 size = 256;
718 break;
719 case I965_PGETBL_SIZE_512KB:
720 size = 512;
721 break;
722 case I965_PGETBL_SIZE_1MB:
723 size = 1024;
724 break;
725 case I965_PGETBL_SIZE_2MB:
726 size = 2048;
727 break;
728 case I965_PGETBL_SIZE_1_5MB:
729 size = 1024 + 512;
730 break;
731 default:
732 dev_info(&intel_private.pcidev->dev,
733 "unknown page table size, assuming 512KB\n");
734 size = 512;
735 }
736 size += 4; /* add in BIOS popup space */
737 } else if (IS_G33 && !IS_PINEVIEW) {
738 /* G33's GTT size defined in gmch_ctrl */
739 switch (gmch_ctrl & G33_PGETBL_SIZE_MASK) {
740 case G33_PGETBL_SIZE_1M:
741 size = 1024;
742 break;
743 case G33_PGETBL_SIZE_2M:
744 size = 2048;
745 break;
746 default:
747 dev_info(&intel_private.bridge_dev->dev,
748 "unknown page table size 0x%x, assuming 512KB\n",
749 (gmch_ctrl & G33_PGETBL_SIZE_MASK));
750 size = 512;
751 }
752 size += 4;
753 } else if (IS_G4X || IS_PINEVIEW) {
754 /* On 4 series hardware, GTT stolen is separate from graphics
755 * stolen, ignore it in stolen gtt entries counting. However,
756 * 4KB of the stolen memory doesn't get mapped to the GTT.
757 */
758 size = 4;
759 } else {
760 /* On previous hardware, the GTT size was just what was
761 * required to map the aperture.
762 */
763 size = agp_bridge->driver->fetch_size() + 4;
764 }
765
766 return size/KB(4);
767 }
768 #endif
769
770 static unsigned int intel_gtt_mappable_entries(void)
771 {
772 unsigned int aperture_size;
773 u16 gmch_ctrl;
774
775 aperture_size = 1024 * 1024;
776
777 pci_read_config_word(intel_private.bridge_dev,
778 I830_GMCH_CTRL, &gmch_ctrl);
779
780 switch (intel_private.pcidev->device) {
781 case PCI_DEVICE_ID_INTEL_82830_CGC:
782 case PCI_DEVICE_ID_INTEL_82845G_IG:
783 case PCI_DEVICE_ID_INTEL_82855GM_IG:
784 case PCI_DEVICE_ID_INTEL_82865_IG:
785 if ((gmch_ctrl & I830_GMCH_MEM_MASK) == I830_GMCH_MEM_64M)
786 aperture_size *= 64;
787 else
788 aperture_size *= 128;
789 break;
790 default:
791 /* 9xx supports large sizes, just look at the length */
792 aperture_size = pci_resource_len(intel_private.pcidev, 2);
793 break;
794 }
795
796 return aperture_size >> PAGE_SHIFT;
797 }
798
799 static int intel_gtt_init(void)
800 {
801 /* we have to call this as early as possible after the MMIO base address is known */
802 intel_private.base.gtt_stolen_entries = intel_gtt_stolen_entries();
803 if (intel_private.base.gtt_stolen_entries == 0) {
804 iounmap(intel_private.registers);
805 return -ENOMEM;
806 }
807
808 return 0;
809 }
810
811 static int intel_fake_agp_fetch_size(void)
812 {
813 unsigned int aper_size;
814 int i;
815 int num_sizes = ARRAY_SIZE(intel_i830_sizes);
816
817 aper_size = (intel_private.base.gtt_mappable_entries << PAGE_SHIFT)
818 / MB(1);
819
820 for (i = 0; i < num_sizes; i++) {
821 if (aper_size == intel_i830_sizes[i].size) {
822 agp_bridge->current_size = intel_i830_sizes + i;
823 return aper_size;
824 }
825 }
826
827 return 0;
828 }
829
830 static void intel_i830_fini_flush(void)
831 {
832 kunmap(intel_private.i8xx_page);
833 intel_private.i8xx_flush_page = NULL;
834 unmap_page_from_agp(intel_private.i8xx_page);
835
836 __free_page(intel_private.i8xx_page);
837 intel_private.i8xx_page = NULL;
838 }
839
840 static void intel_i830_setup_flush(void)
841 {
842 /* return if we've already set the flush mechanism up */
843 if (intel_private.i8xx_page)
844 return;
845
846 intel_private.i8xx_page = alloc_page(GFP_KERNEL | __GFP_ZERO | GFP_DMA32);
847 if (!intel_private.i8xx_page)
848 return;
849
850 intel_private.i8xx_flush_page = kmap(intel_private.i8xx_page);
851 if (!intel_private.i8xx_flush_page)
852 intel_i830_fini_flush();
853 }
854
855 /* The chipset_flush interface needs to get data that has already been
856 * flushed out of the CPU all the way out to main memory, because the GPU
857 * doesn't snoop those buffers.
858 *
859 * The 8xx series doesn't have the same lovely interface for flushing the
860 * chipset write buffers that the later chips do. According to the 865
861 * specs, it's 64 octwords, or 1KB. So, to get those previous things in
862 * that buffer out, we just fill 1KB and clflush it out, on the assumption
863 * that it'll push whatever was in there out. It appears to work.
864 */
865 static void intel_i830_chipset_flush(struct agp_bridge_data *bridge)
866 {
867 unsigned int *pg = intel_private.i8xx_flush_page;
868
869 memset(pg, 0, 1024);
870
871 if (cpu_has_clflush)
872 clflush_cache_range(pg, 1024);
873 else if (wbinvd_on_all_cpus() != 0)
874 printk(KERN_ERR "Timed out waiting for cache flush.\n");
875 }
876
877 /* The intel i830 automatically initializes the agp aperture during POST.
878 * Use the memory already set aside for in the GTT.
879 */
880 static int intel_i830_create_gatt_table(struct agp_bridge_data *bridge)
881 {
882 int page_order, ret;
883 struct aper_size_info_fixed *size;
884 int num_entries;
885 u32 temp;
886
887 size = agp_bridge->current_size;
888 page_order = size->page_order;
889 num_entries = size->num_entries;
890 agp_bridge->gatt_table_real = NULL;
891
892 pci_read_config_dword(intel_private.pcidev, I810_MMADDR, &temp);
893 temp &= 0xfff80000;
894
895 intel_private.registers = ioremap(temp, 128 * 4096);
896 if (!intel_private.registers)
897 return -ENOMEM;
898
899 temp = readl(intel_private.registers+I810_PGETBL_CTL) & 0xfffff000;
900 global_cache_flush(); /* FIXME: ?? */
901
902 ret = intel_gtt_init();
903 if (ret != 0)
904 return ret;
905
906 agp_bridge->gatt_table = NULL;
907
908 agp_bridge->gatt_bus_addr = temp;
909
910 return 0;
911 }
912
913 /* Return the gatt table to a sane state. Use the top of stolen
914 * memory for the GTT.
915 */
916 static int intel_i830_free_gatt_table(struct agp_bridge_data *bridge)
917 {
918 return 0;
919 }
920
921 static int intel_i830_configure(void)
922 {
923 struct aper_size_info_fixed *current_size;
924 u32 temp;
925 u16 gmch_ctrl;
926 int i;
927
928 current_size = A_SIZE_FIX(agp_bridge->current_size);
929
930 pci_read_config_dword(intel_private.pcidev, I810_GMADDR, &temp);
931 agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
932
933 pci_read_config_word(intel_private.bridge_dev, I830_GMCH_CTRL, &gmch_ctrl);
934 gmch_ctrl |= I830_GMCH_ENABLED;
935 pci_write_config_word(intel_private.bridge_dev, I830_GMCH_CTRL, gmch_ctrl);
936
937 writel(agp_bridge->gatt_bus_addr|I810_PGETBL_ENABLED, intel_private.registers+I810_PGETBL_CTL);
938 readl(intel_private.registers+I810_PGETBL_CTL); /* PCI Posting. */
939
940 if (agp_bridge->driver->needs_scratch_page) {
941 for (i = intel_private.base.gtt_stolen_entries; i < current_size->num_entries; i++) {
942 writel(agp_bridge->scratch_page, intel_private.registers+I810_PTE_BASE+(i*4));
943 }
944 readl(intel_private.registers+I810_PTE_BASE+((i-1)*4)); /* PCI Posting. */
945 }
946
947 global_cache_flush();
948
949 intel_i830_setup_flush();
950 return 0;
951 }
952
953 static void intel_i830_cleanup(void)
954 {
955 iounmap(intel_private.registers);
956 }
957
958 static int intel_i830_insert_entries(struct agp_memory *mem, off_t pg_start,
959 int type)
960 {
961 int i, j, num_entries;
962 void *temp;
963 int ret = -EINVAL;
964 int mask_type;
965
966 if (mem->page_count == 0)
967 goto out;
968
969 temp = agp_bridge->current_size;
970 num_entries = A_SIZE_FIX(temp)->num_entries;
971
972 if (pg_start < intel_private.base.gtt_stolen_entries) {
973 dev_printk(KERN_DEBUG, &intel_private.pcidev->dev,
974 "pg_start == 0x%.8lx, gtt_stolen_entries == 0x%.8x\n",
975 pg_start, intel_private.base.gtt_stolen_entries);
976
977 dev_info(&intel_private.pcidev->dev,
978 "trying to insert into local/stolen memory\n");
979 goto out_err;
980 }
981
982 if ((pg_start + mem->page_count) > num_entries)
983 goto out_err;
984
985 /* The i830 can't check the GTT for entries since its read only,
986 * depend on the caller to make the correct offset decisions.
987 */
988
989 if (type != mem->type)
990 goto out_err;
991
992 mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type);
993
994 if (mask_type != 0 && mask_type != AGP_PHYS_MEMORY &&
995 mask_type != INTEL_AGP_CACHED_MEMORY)
996 goto out_err;
997
998 if (!mem->is_flushed)
999 global_cache_flush();
1000
1001 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
1002 writel(agp_bridge->driver->mask_memory(agp_bridge,
1003 page_to_phys(mem->pages[i]), mask_type),
1004 intel_private.registers+I810_PTE_BASE+(j*4));
1005 }
1006 readl(intel_private.registers+I810_PTE_BASE+((j-1)*4));
1007
1008 out:
1009 ret = 0;
1010 out_err:
1011 mem->is_flushed = true;
1012 return ret;
1013 }
1014
1015 static int intel_i830_remove_entries(struct agp_memory *mem, off_t pg_start,
1016 int type)
1017 {
1018 int i;
1019
1020 if (mem->page_count == 0)
1021 return 0;
1022
1023 if (pg_start < intel_private.base.gtt_stolen_entries) {
1024 dev_info(&intel_private.pcidev->dev,
1025 "trying to disable local/stolen memory\n");
1026 return -EINVAL;
1027 }
1028
1029 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
1030 writel(agp_bridge->scratch_page, intel_private.registers+I810_PTE_BASE+(i*4));
1031 }
1032 readl(intel_private.registers+I810_PTE_BASE+((i-1)*4));
1033
1034 return 0;
1035 }
1036
1037 static struct agp_memory *intel_i830_alloc_by_type(size_t pg_count, int type)
1038 {
1039 if (type == AGP_PHYS_MEMORY)
1040 return alloc_agpphysmem_i8xx(pg_count, type);
1041 /* always return NULL for other allocation types for now */
1042 return NULL;
1043 }
1044
1045 static int intel_alloc_chipset_flush_resource(void)
1046 {
1047 int ret;
1048 ret = pci_bus_alloc_resource(intel_private.bridge_dev->bus, &intel_private.ifp_resource, PAGE_SIZE,
1049 PAGE_SIZE, PCIBIOS_MIN_MEM, 0,
1050 pcibios_align_resource, intel_private.bridge_dev);
1051
1052 return ret;
1053 }
1054
1055 static void intel_i915_setup_chipset_flush(void)
1056 {
1057 int ret;
1058 u32 temp;
1059
1060 pci_read_config_dword(intel_private.bridge_dev, I915_IFPADDR, &temp);
1061 if (!(temp & 0x1)) {
1062 intel_alloc_chipset_flush_resource();
1063 intel_private.resource_valid = 1;
1064 pci_write_config_dword(intel_private.bridge_dev, I915_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1);
1065 } else {
1066 temp &= ~1;
1067
1068 intel_private.resource_valid = 1;
1069 intel_private.ifp_resource.start = temp;
1070 intel_private.ifp_resource.end = temp + PAGE_SIZE;
1071 ret = request_resource(&iomem_resource, &intel_private.ifp_resource);
1072 /* some BIOSes reserve this area in a pnp some don't */
1073 if (ret)
1074 intel_private.resource_valid = 0;
1075 }
1076 }
1077
1078 static void intel_i965_g33_setup_chipset_flush(void)
1079 {
1080 u32 temp_hi, temp_lo;
1081 int ret;
1082
1083 pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4, &temp_hi);
1084 pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR, &temp_lo);
1085
1086 if (!(temp_lo & 0x1)) {
1087
1088 intel_alloc_chipset_flush_resource();
1089
1090 intel_private.resource_valid = 1;
1091 pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4,
1092 upper_32_bits(intel_private.ifp_resource.start));
1093 pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1);
1094 } else {
1095 u64 l64;
1096
1097 temp_lo &= ~0x1;
1098 l64 = ((u64)temp_hi << 32) | temp_lo;
1099
1100 intel_private.resource_valid = 1;
1101 intel_private.ifp_resource.start = l64;
1102 intel_private.ifp_resource.end = l64 + PAGE_SIZE;
1103 ret = request_resource(&iomem_resource, &intel_private.ifp_resource);
1104 /* some BIOSes reserve this area in a pnp some don't */
1105 if (ret)
1106 intel_private.resource_valid = 0;
1107 }
1108 }
1109
1110 static void intel_i9xx_setup_flush(void)
1111 {
1112 /* return if already configured */
1113 if (intel_private.ifp_resource.start)
1114 return;
1115
1116 if (IS_SNB)
1117 return;
1118
1119 /* setup a resource for this object */
1120 intel_private.ifp_resource.name = "Intel Flush Page";
1121 intel_private.ifp_resource.flags = IORESOURCE_MEM;
1122
1123 /* Setup chipset flush for 915 */
1124 if (IS_I965 || IS_G33 || IS_G4X) {
1125 intel_i965_g33_setup_chipset_flush();
1126 } else {
1127 intel_i915_setup_chipset_flush();
1128 }
1129
1130 if (intel_private.ifp_resource.start)
1131 intel_private.i9xx_flush_page = ioremap_nocache(intel_private.ifp_resource.start, PAGE_SIZE);
1132 if (!intel_private.i9xx_flush_page)
1133 dev_err(&intel_private.pcidev->dev,
1134 "can't ioremap flush page - no chipset flushing\n");
1135 }
1136
1137 static int intel_i9xx_configure(void)
1138 {
1139 struct aper_size_info_fixed *current_size;
1140 u32 temp;
1141 u16 gmch_ctrl;
1142 int i;
1143
1144 current_size = A_SIZE_FIX(agp_bridge->current_size);
1145
1146 pci_read_config_dword(intel_private.pcidev, I915_GMADDR, &temp);
1147
1148 agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
1149
1150 pci_read_config_word(intel_private.bridge_dev, I830_GMCH_CTRL, &gmch_ctrl);
1151 gmch_ctrl |= I830_GMCH_ENABLED;
1152 pci_write_config_word(intel_private.bridge_dev, I830_GMCH_CTRL, gmch_ctrl);
1153
1154 writel(agp_bridge->gatt_bus_addr|I810_PGETBL_ENABLED, intel_private.registers+I810_PGETBL_CTL);
1155 readl(intel_private.registers+I810_PGETBL_CTL); /* PCI Posting. */
1156
1157 if (agp_bridge->driver->needs_scratch_page) {
1158 for (i = intel_private.base.gtt_stolen_entries; i <
1159 intel_private.base.gtt_total_entries; i++) {
1160 writel(agp_bridge->scratch_page, intel_private.gtt+i);
1161 }
1162 readl(intel_private.gtt+i-1); /* PCI Posting. */
1163 }
1164
1165 global_cache_flush();
1166
1167 intel_i9xx_setup_flush();
1168
1169 return 0;
1170 }
1171
1172 static void intel_i915_cleanup(void)
1173 {
1174 if (intel_private.i9xx_flush_page)
1175 iounmap(intel_private.i9xx_flush_page);
1176 if (intel_private.resource_valid)
1177 release_resource(&intel_private.ifp_resource);
1178 intel_private.ifp_resource.start = 0;
1179 intel_private.resource_valid = 0;
1180 iounmap(intel_private.gtt);
1181 iounmap(intel_private.registers);
1182 }
1183
1184 static void intel_i915_chipset_flush(struct agp_bridge_data *bridge)
1185 {
1186 if (intel_private.i9xx_flush_page)
1187 writel(1, intel_private.i9xx_flush_page);
1188 }
1189
1190 static int intel_i915_insert_entries(struct agp_memory *mem, off_t pg_start,
1191 int type)
1192 {
1193 int num_entries;
1194 void *temp;
1195 int ret = -EINVAL;
1196 int mask_type;
1197
1198 if (mem->page_count == 0)
1199 goto out;
1200
1201 temp = agp_bridge->current_size;
1202 num_entries = A_SIZE_FIX(temp)->num_entries;
1203
1204 if (pg_start < intel_private.base.gtt_stolen_entries) {
1205 dev_printk(KERN_DEBUG, &intel_private.pcidev->dev,
1206 "pg_start == 0x%.8lx, gtt_stolen_entries == 0x%.8x\n",
1207 pg_start, intel_private.base.gtt_stolen_entries);
1208
1209 dev_info(&intel_private.pcidev->dev,
1210 "trying to insert into local/stolen memory\n");
1211 goto out_err;
1212 }
1213
1214 if ((pg_start + mem->page_count) > num_entries)
1215 goto out_err;
1216
1217 /* The i915 can't check the GTT for entries since it's read only;
1218 * depend on the caller to make the correct offset decisions.
1219 */
1220
1221 if (type != mem->type)
1222 goto out_err;
1223
1224 mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type);
1225
1226 if (!IS_SNB && mask_type != 0 && mask_type != AGP_PHYS_MEMORY &&
1227 mask_type != INTEL_AGP_CACHED_MEMORY)
1228 goto out_err;
1229
1230 if (!mem->is_flushed)
1231 global_cache_flush();
1232
1233 intel_agp_insert_sg_entries(mem, pg_start, mask_type);
1234
1235 out:
1236 ret = 0;
1237 out_err:
1238 mem->is_flushed = true;
1239 return ret;
1240 }
1241
1242 static int intel_i915_remove_entries(struct agp_memory *mem, off_t pg_start,
1243 int type)
1244 {
1245 int i;
1246
1247 if (mem->page_count == 0)
1248 return 0;
1249
1250 if (pg_start < intel_private.base.gtt_stolen_entries) {
1251 dev_info(&intel_private.pcidev->dev,
1252 "trying to disable local/stolen memory\n");
1253 return -EINVAL;
1254 }
1255
1256 for (i = pg_start; i < (mem->page_count + pg_start); i++)
1257 writel(agp_bridge->scratch_page, intel_private.gtt+i);
1258
1259 readl(intel_private.gtt+i-1);
1260
1261 return 0;
1262 }
1263
1264 /* Return the aperture size by just checking the resource length. The effect
1265 * described in the spec of the MSAC registers is just changing of the
1266 * resource size.
1267 */
1268 static int intel_i915_get_gtt_size(void)
1269 {
1270 int size;
1271
1272 if (IS_G33) {
1273 u16 gmch_ctrl;
1274
1275 /* G33's GTT size defined in gmch_ctrl */
1276 pci_read_config_word(intel_private.bridge_dev, I830_GMCH_CTRL, &gmch_ctrl);
1277 switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
1278 case I830_GMCH_GMS_STOLEN_512:
1279 size = 512;
1280 break;
1281 case I830_GMCH_GMS_STOLEN_1024:
1282 size = 1024;
1283 break;
1284 case I830_GMCH_GMS_STOLEN_8192:
1285 size = 8*1024;
1286 break;
1287 default:
1288 dev_info(&intel_private.bridge_dev->dev,
1289 "unknown page table size 0x%x, assuming 512KB\n",
1290 (gmch_ctrl & I830_GMCH_GMS_MASK));
1291 size = 512;
1292 }
1293 } else {
1294 /* On previous hardware, the GTT size was just what was
1295 * required to map the aperture.
1296 */
1297 size = agp_bridge->driver->fetch_size();
1298 }
1299
1300 return KB(size);
1301 }
1302
1303 /* The intel i915 automatically initializes the agp aperture during POST.
1304 * Use the memory already set aside for in the GTT.
1305 */
1306 static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge)
1307 {
1308 int page_order, ret;
1309 struct aper_size_info_fixed *size;
1310 int num_entries;
1311 u32 temp, temp2;
1312 int gtt_map_size;
1313
1314 size = agp_bridge->current_size;
1315 page_order = size->page_order;
1316 num_entries = size->num_entries;
1317 agp_bridge->gatt_table_real = NULL;
1318
1319 pci_read_config_dword(intel_private.pcidev, I915_MMADDR, &temp);
1320 pci_read_config_dword(intel_private.pcidev, I915_PTEADDR, &temp2);
1321
1322 gtt_map_size = intel_i915_get_gtt_size();
1323
1324 intel_private.gtt = ioremap(temp2, gtt_map_size);
1325 if (!intel_private.gtt)
1326 return -ENOMEM;
1327
1328 intel_private.base.gtt_total_entries = gtt_map_size / 4;
1329
1330 temp &= 0xfff80000;
1331
1332 intel_private.registers = ioremap(temp, 128 * 4096);
1333 if (!intel_private.registers) {
1334 iounmap(intel_private.gtt);
1335 return -ENOMEM;
1336 }
1337
1338 temp = readl(intel_private.registers+I810_PGETBL_CTL) & 0xfffff000;
1339 global_cache_flush(); /* FIXME: ? */
1340
1341 ret = intel_gtt_init();
1342 if (ret != 0) {
1343 iounmap(intel_private.gtt);
1344 return ret;
1345 }
1346
1347 agp_bridge->gatt_table = NULL;
1348
1349 agp_bridge->gatt_bus_addr = temp;
1350
1351 return 0;
1352 }
1353
1354 /*
1355 * The i965 supports 36-bit physical addresses, but to keep
1356 * the format of the GTT the same, the bits that don't fit
1357 * in a 32-bit word are shifted down to bits 4..7.
1358 *
1359 * Gcc is smart enough to notice that "(addr >> 28) & 0xf0"
1360 * is always zero on 32-bit architectures, so no need to make
1361 * this conditional.
1362 */
1363 static unsigned long intel_i965_mask_memory(struct agp_bridge_data *bridge,
1364 dma_addr_t addr, int type)
1365 {
1366 /* Shift high bits down */
1367 addr |= (addr >> 28) & 0xf0;
1368
1369 /* Type checking must be done elsewhere */
1370 return addr | bridge->driver->masks[type].mask;
1371 }
1372
1373 static unsigned long intel_gen6_mask_memory(struct agp_bridge_data *bridge,
1374 dma_addr_t addr, int type)
1375 {
1376 /* gen6 has bit11-4 for physical addr bit39-32 */
1377 addr |= (addr >> 28) & 0xff0;
1378
1379 /* Type checking must be done elsewhere */
1380 return addr | bridge->driver->masks[type].mask;
1381 }
1382
1383 static void intel_i965_get_gtt_range(int *gtt_offset, int *gtt_size)
1384 {
1385 u16 snb_gmch_ctl;
1386
1387 switch (intel_private.bridge_dev->device) {
1388 case PCI_DEVICE_ID_INTEL_GM45_HB:
1389 case PCI_DEVICE_ID_INTEL_EAGLELAKE_HB:
1390 case PCI_DEVICE_ID_INTEL_Q45_HB:
1391 case PCI_DEVICE_ID_INTEL_G45_HB:
1392 case PCI_DEVICE_ID_INTEL_G41_HB:
1393 case PCI_DEVICE_ID_INTEL_B43_HB:
1394 case PCI_DEVICE_ID_INTEL_IRONLAKE_D_HB:
1395 case PCI_DEVICE_ID_INTEL_IRONLAKE_M_HB:
1396 case PCI_DEVICE_ID_INTEL_IRONLAKE_MA_HB:
1397 case PCI_DEVICE_ID_INTEL_IRONLAKE_MC2_HB:
1398 *gtt_offset = *gtt_size = MB(2);
1399 break;
1400 case PCI_DEVICE_ID_INTEL_SANDYBRIDGE_HB:
1401 case PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_HB:
1402 case PCI_DEVICE_ID_INTEL_SANDYBRIDGE_S_HB:
1403 *gtt_offset = MB(2);
1404
1405 pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);
1406 switch (snb_gmch_ctl & SNB_GTT_SIZE_MASK) {
1407 default:
1408 case SNB_GTT_SIZE_0M:
1409 printk(KERN_ERR "Bad GTT size mask: 0x%04x.\n", snb_gmch_ctl);
1410 *gtt_size = MB(0);
1411 break;
1412 case SNB_GTT_SIZE_1M:
1413 *gtt_size = MB(1);
1414 break;
1415 case SNB_GTT_SIZE_2M:
1416 *gtt_size = MB(2);
1417 break;
1418 }
1419 break;
1420 default:
1421 *gtt_offset = *gtt_size = KB(512);
1422 }
1423 }
1424
1425 /* The intel i965 automatically initializes the agp aperture during POST.
1426 * Use the memory already set aside for in the GTT.
1427 */
1428 static int intel_i965_create_gatt_table(struct agp_bridge_data *bridge)
1429 {
1430 int page_order, ret;
1431 struct aper_size_info_fixed *size;
1432 int num_entries;
1433 u32 temp;
1434 int gtt_offset, gtt_size;
1435
1436 size = agp_bridge->current_size;
1437 page_order = size->page_order;
1438 num_entries = size->num_entries;
1439 agp_bridge->gatt_table_real = NULL;
1440
1441 pci_read_config_dword(intel_private.pcidev, I915_MMADDR, &temp);
1442
1443 temp &= 0xfff00000;
1444
1445 intel_i965_get_gtt_range(&gtt_offset, &gtt_size);
1446
1447 intel_private.gtt = ioremap((temp + gtt_offset) , gtt_size);
1448
1449 if (!intel_private.gtt)
1450 return -ENOMEM;
1451
1452 intel_private.base.gtt_total_entries = gtt_size / 4;
1453
1454 intel_private.registers = ioremap(temp, 128 * 4096);
1455 if (!intel_private.registers) {
1456 iounmap(intel_private.gtt);
1457 return -ENOMEM;
1458 }
1459
1460 temp = readl(intel_private.registers+I810_PGETBL_CTL) & 0xfffff000;
1461 global_cache_flush(); /* FIXME: ? */
1462
1463 ret = intel_gtt_init();
1464 if (ret != 0) {
1465 iounmap(intel_private.gtt);
1466 return ret;
1467 }
1468
1469 agp_bridge->gatt_table = NULL;
1470
1471 agp_bridge->gatt_bus_addr = temp;
1472
1473 return 0;
1474 }
1475
1476 static const struct agp_bridge_driver intel_810_driver = {
1477 .owner = THIS_MODULE,
1478 .aperture_sizes = intel_i810_sizes,
1479 .size_type = FIXED_APER_SIZE,
1480 .num_aperture_sizes = 2,
1481 .needs_scratch_page = true,
1482 .configure = intel_i810_configure,
1483 .fetch_size = intel_i810_fetch_size,
1484 .cleanup = intel_i810_cleanup,
1485 .mask_memory = intel_i810_mask_memory,
1486 .masks = intel_i810_masks,
1487 .agp_enable = intel_i810_agp_enable,
1488 .cache_flush = global_cache_flush,
1489 .create_gatt_table = agp_generic_create_gatt_table,
1490 .free_gatt_table = agp_generic_free_gatt_table,
1491 .insert_memory = intel_i810_insert_entries,
1492 .remove_memory = intel_i810_remove_entries,
1493 .alloc_by_type = intel_i810_alloc_by_type,
1494 .free_by_type = intel_i810_free_by_type,
1495 .agp_alloc_page = agp_generic_alloc_page,
1496 .agp_alloc_pages = agp_generic_alloc_pages,
1497 .agp_destroy_page = agp_generic_destroy_page,
1498 .agp_destroy_pages = agp_generic_destroy_pages,
1499 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
1500 };
1501
1502 static const struct agp_bridge_driver intel_830_driver = {
1503 .owner = THIS_MODULE,
1504 .aperture_sizes = intel_i830_sizes,
1505 .size_type = FIXED_APER_SIZE,
1506 .num_aperture_sizes = 4,
1507 .needs_scratch_page = true,
1508 .configure = intel_i830_configure,
1509 .fetch_size = intel_fake_agp_fetch_size,
1510 .cleanup = intel_i830_cleanup,
1511 .mask_memory = intel_i810_mask_memory,
1512 .masks = intel_i810_masks,
1513 .agp_enable = intel_i810_agp_enable,
1514 .cache_flush = global_cache_flush,
1515 .create_gatt_table = intel_i830_create_gatt_table,
1516 .free_gatt_table = intel_i830_free_gatt_table,
1517 .insert_memory = intel_i830_insert_entries,
1518 .remove_memory = intel_i830_remove_entries,
1519 .alloc_by_type = intel_i830_alloc_by_type,
1520 .free_by_type = intel_i810_free_by_type,
1521 .agp_alloc_page = agp_generic_alloc_page,
1522 .agp_alloc_pages = agp_generic_alloc_pages,
1523 .agp_destroy_page = agp_generic_destroy_page,
1524 .agp_destroy_pages = agp_generic_destroy_pages,
1525 .agp_type_to_mask_type = intel_i830_type_to_mask_type,
1526 .chipset_flush = intel_i830_chipset_flush,
1527 };
1528
1529 static const struct agp_bridge_driver intel_915_driver = {
1530 .owner = THIS_MODULE,
1531 .aperture_sizes = intel_i830_sizes,
1532 .size_type = FIXED_APER_SIZE,
1533 .num_aperture_sizes = 4,
1534 .needs_scratch_page = true,
1535 .configure = intel_i9xx_configure,
1536 .fetch_size = intel_fake_agp_fetch_size,
1537 .cleanup = intel_i915_cleanup,
1538 .mask_memory = intel_i810_mask_memory,
1539 .masks = intel_i810_masks,
1540 .agp_enable = intel_i810_agp_enable,
1541 .cache_flush = global_cache_flush,
1542 .create_gatt_table = intel_i915_create_gatt_table,
1543 .free_gatt_table = intel_i830_free_gatt_table,
1544 .insert_memory = intel_i915_insert_entries,
1545 .remove_memory = intel_i915_remove_entries,
1546 .alloc_by_type = intel_i830_alloc_by_type,
1547 .free_by_type = intel_i810_free_by_type,
1548 .agp_alloc_page = agp_generic_alloc_page,
1549 .agp_alloc_pages = agp_generic_alloc_pages,
1550 .agp_destroy_page = agp_generic_destroy_page,
1551 .agp_destroy_pages = agp_generic_destroy_pages,
1552 .agp_type_to_mask_type = intel_i830_type_to_mask_type,
1553 .chipset_flush = intel_i915_chipset_flush,
1554 #ifdef USE_PCI_DMA_API
1555 .agp_map_page = intel_agp_map_page,
1556 .agp_unmap_page = intel_agp_unmap_page,
1557 .agp_map_memory = intel_agp_map_memory,
1558 .agp_unmap_memory = intel_agp_unmap_memory,
1559 #endif
1560 };
1561
1562 static const struct agp_bridge_driver intel_i965_driver = {
1563 .owner = THIS_MODULE,
1564 .aperture_sizes = intel_i830_sizes,
1565 .size_type = FIXED_APER_SIZE,
1566 .num_aperture_sizes = 4,
1567 .needs_scratch_page = true,
1568 .configure = intel_i9xx_configure,
1569 .fetch_size = intel_fake_agp_fetch_size,
1570 .cleanup = intel_i915_cleanup,
1571 .mask_memory = intel_i965_mask_memory,
1572 .masks = intel_i810_masks,
1573 .agp_enable = intel_i810_agp_enable,
1574 .cache_flush = global_cache_flush,
1575 .create_gatt_table = intel_i965_create_gatt_table,
1576 .free_gatt_table = intel_i830_free_gatt_table,
1577 .insert_memory = intel_i915_insert_entries,
1578 .remove_memory = intel_i915_remove_entries,
1579 .alloc_by_type = intel_i830_alloc_by_type,
1580 .free_by_type = intel_i810_free_by_type,
1581 .agp_alloc_page = agp_generic_alloc_page,
1582 .agp_alloc_pages = agp_generic_alloc_pages,
1583 .agp_destroy_page = agp_generic_destroy_page,
1584 .agp_destroy_pages = agp_generic_destroy_pages,
1585 .agp_type_to_mask_type = intel_i830_type_to_mask_type,
1586 .chipset_flush = intel_i915_chipset_flush,
1587 #ifdef USE_PCI_DMA_API
1588 .agp_map_page = intel_agp_map_page,
1589 .agp_unmap_page = intel_agp_unmap_page,
1590 .agp_map_memory = intel_agp_map_memory,
1591 .agp_unmap_memory = intel_agp_unmap_memory,
1592 #endif
1593 };
1594
1595 static const struct agp_bridge_driver intel_gen6_driver = {
1596 .owner = THIS_MODULE,
1597 .aperture_sizes = intel_i830_sizes,
1598 .size_type = FIXED_APER_SIZE,
1599 .num_aperture_sizes = 4,
1600 .needs_scratch_page = true,
1601 .configure = intel_i9xx_configure,
1602 .fetch_size = intel_fake_agp_fetch_size,
1603 .cleanup = intel_i915_cleanup,
1604 .mask_memory = intel_gen6_mask_memory,
1605 .masks = intel_gen6_masks,
1606 .agp_enable = intel_i810_agp_enable,
1607 .cache_flush = global_cache_flush,
1608 .create_gatt_table = intel_i965_create_gatt_table,
1609 .free_gatt_table = intel_i830_free_gatt_table,
1610 .insert_memory = intel_i915_insert_entries,
1611 .remove_memory = intel_i915_remove_entries,
1612 .alloc_by_type = intel_i830_alloc_by_type,
1613 .free_by_type = intel_i810_free_by_type,
1614 .agp_alloc_page = agp_generic_alloc_page,
1615 .agp_alloc_pages = agp_generic_alloc_pages,
1616 .agp_destroy_page = agp_generic_destroy_page,
1617 .agp_destroy_pages = agp_generic_destroy_pages,
1618 .agp_type_to_mask_type = intel_gen6_type_to_mask_type,
1619 .chipset_flush = intel_i915_chipset_flush,
1620 #ifdef USE_PCI_DMA_API
1621 .agp_map_page = intel_agp_map_page,
1622 .agp_unmap_page = intel_agp_unmap_page,
1623 .agp_map_memory = intel_agp_map_memory,
1624 .agp_unmap_memory = intel_agp_unmap_memory,
1625 #endif
1626 };
1627
1628 static const struct agp_bridge_driver intel_g33_driver = {
1629 .owner = THIS_MODULE,
1630 .aperture_sizes = intel_i830_sizes,
1631 .size_type = FIXED_APER_SIZE,
1632 .num_aperture_sizes = 4,
1633 .needs_scratch_page = true,
1634 .configure = intel_i9xx_configure,
1635 .fetch_size = intel_fake_agp_fetch_size,
1636 .cleanup = intel_i915_cleanup,
1637 .mask_memory = intel_i965_mask_memory,
1638 .masks = intel_i810_masks,
1639 .agp_enable = intel_i810_agp_enable,
1640 .cache_flush = global_cache_flush,
1641 .create_gatt_table = intel_i915_create_gatt_table,
1642 .free_gatt_table = intel_i830_free_gatt_table,
1643 .insert_memory = intel_i915_insert_entries,
1644 .remove_memory = intel_i915_remove_entries,
1645 .alloc_by_type = intel_i830_alloc_by_type,
1646 .free_by_type = intel_i810_free_by_type,
1647 .agp_alloc_page = agp_generic_alloc_page,
1648 .agp_alloc_pages = agp_generic_alloc_pages,
1649 .agp_destroy_page = agp_generic_destroy_page,
1650 .agp_destroy_pages = agp_generic_destroy_pages,
1651 .agp_type_to_mask_type = intel_i830_type_to_mask_type,
1652 .chipset_flush = intel_i915_chipset_flush,
1653 #ifdef USE_PCI_DMA_API
1654 .agp_map_page = intel_agp_map_page,
1655 .agp_unmap_page = intel_agp_unmap_page,
1656 .agp_map_memory = intel_agp_map_memory,
1657 .agp_unmap_memory = intel_agp_unmap_memory,
1658 #endif
1659 };
1660
1661 /* Table to describe Intel GMCH and AGP/PCIE GART drivers. At least one of
1662 * driver and gmch_driver must be non-null, and find_gmch will determine
1663 * which one should be used if a gmch_chip_id is present.
1664 */
1665 static const struct intel_gtt_driver_description {
1666 unsigned int gmch_chip_id;
1667 char *name;
1668 const struct agp_bridge_driver *gmch_driver;
1669 } intel_gtt_chipsets[] = {
1670 { PCI_DEVICE_ID_INTEL_82810_IG1, "i810", &intel_810_driver },
1671 { PCI_DEVICE_ID_INTEL_82810_IG3, "i810", &intel_810_driver },
1672 { PCI_DEVICE_ID_INTEL_82810E_IG, "i810", &intel_810_driver },
1673 { PCI_DEVICE_ID_INTEL_82815_CGC, "i815", &intel_810_driver },
1674 { PCI_DEVICE_ID_INTEL_82830_CGC, "830M", &intel_830_driver },
1675 { PCI_DEVICE_ID_INTEL_82845G_IG, "830M", &intel_830_driver },
1676 { PCI_DEVICE_ID_INTEL_82854_IG, "854", &intel_830_driver },
1677 { PCI_DEVICE_ID_INTEL_82855GM_IG, "855GM", &intel_830_driver },
1678 { PCI_DEVICE_ID_INTEL_82865_IG, "865", &intel_830_driver },
1679 { PCI_DEVICE_ID_INTEL_E7221_IG, "E7221 (i915)", &intel_915_driver },
1680 { PCI_DEVICE_ID_INTEL_82915G_IG, "915G", &intel_915_driver },
1681 { PCI_DEVICE_ID_INTEL_82915GM_IG, "915GM", &intel_915_driver },
1682 { PCI_DEVICE_ID_INTEL_82945G_IG, "945G", &intel_915_driver },
1683 { PCI_DEVICE_ID_INTEL_82945GM_IG, "945GM", &intel_915_driver },
1684 { PCI_DEVICE_ID_INTEL_82945GME_IG, "945GME", &intel_915_driver },
1685 { PCI_DEVICE_ID_INTEL_82946GZ_IG, "946GZ", &intel_i965_driver },
1686 { PCI_DEVICE_ID_INTEL_82G35_IG, "G35", &intel_i965_driver },
1687 { PCI_DEVICE_ID_INTEL_82965Q_IG, "965Q", &intel_i965_driver },
1688 { PCI_DEVICE_ID_INTEL_82965G_IG, "965G", &intel_i965_driver },
1689 { PCI_DEVICE_ID_INTEL_82965GM_IG, "965GM", &intel_i965_driver },
1690 { PCI_DEVICE_ID_INTEL_82965GME_IG, "965GME/GLE", &intel_i965_driver },
1691 { PCI_DEVICE_ID_INTEL_G33_IG, "G33", &intel_g33_driver },
1692 { PCI_DEVICE_ID_INTEL_Q35_IG, "Q35", &intel_g33_driver },
1693 { PCI_DEVICE_ID_INTEL_Q33_IG, "Q33", &intel_g33_driver },
1694 { PCI_DEVICE_ID_INTEL_PINEVIEW_M_IG, "GMA3150", &intel_g33_driver },
1695 { PCI_DEVICE_ID_INTEL_PINEVIEW_IG, "GMA3150", &intel_g33_driver },
1696 { PCI_DEVICE_ID_INTEL_GM45_IG, "GM45", &intel_i965_driver },
1697 { PCI_DEVICE_ID_INTEL_EAGLELAKE_IG, "Eaglelake", &intel_i965_driver },
1698 { PCI_DEVICE_ID_INTEL_Q45_IG, "Q45/Q43", &intel_i965_driver },
1699 { PCI_DEVICE_ID_INTEL_G45_IG, "G45/G43", &intel_i965_driver },
1700 { PCI_DEVICE_ID_INTEL_B43_IG, "B43", &intel_i965_driver },
1701 { PCI_DEVICE_ID_INTEL_G41_IG, "G41", &intel_i965_driver },
1702 { PCI_DEVICE_ID_INTEL_IRONLAKE_D_IG,
1703 "HD Graphics", &intel_i965_driver },
1704 { PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG,
1705 "HD Graphics", &intel_i965_driver },
1706 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT1_IG,
1707 "Sandybridge", &intel_gen6_driver },
1708 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT2_IG,
1709 "Sandybridge", &intel_gen6_driver },
1710 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT2_PLUS_IG,
1711 "Sandybridge", &intel_gen6_driver },
1712 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT1_IG,
1713 "Sandybridge", &intel_gen6_driver },
1714 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT2_IG,
1715 "Sandybridge", &intel_gen6_driver },
1716 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT2_PLUS_IG,
1717 "Sandybridge", &intel_gen6_driver },
1718 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_S_IG,
1719 "Sandybridge", &intel_gen6_driver },
1720 { 0, NULL, NULL }
1721 };
1722
1723 static int find_gmch(u16 device)
1724 {
1725 struct pci_dev *gmch_device;
1726
1727 gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL);
1728 if (gmch_device && PCI_FUNC(gmch_device->devfn) != 0) {
1729 gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL,
1730 device, gmch_device);
1731 }
1732
1733 if (!gmch_device)
1734 return 0;
1735
1736 intel_private.pcidev = gmch_device;
1737 return 1;
1738 }
1739
1740 int intel_gmch_probe(struct pci_dev *pdev,
1741 struct agp_bridge_data *bridge)
1742 {
1743 int i, mask;
1744 bridge->driver = NULL;
1745
1746 for (i = 0; intel_gtt_chipsets[i].name != NULL; i++) {
1747 if (find_gmch(intel_gtt_chipsets[i].gmch_chip_id)) {
1748 bridge->driver =
1749 intel_gtt_chipsets[i].gmch_driver;
1750 break;
1751 }
1752 }
1753
1754 if (!bridge->driver)
1755 return 0;
1756
1757 bridge->dev_private_data = &intel_private;
1758 bridge->dev = pdev;
1759
1760 intel_private.bridge_dev = pci_dev_get(pdev);
1761
1762 dev_info(&pdev->dev, "Intel %s Chipset\n", intel_gtt_chipsets[i].name);
1763
1764 if (bridge->driver->mask_memory == intel_gen6_mask_memory)
1765 mask = 40;
1766 else if (bridge->driver->mask_memory == intel_i965_mask_memory)
1767 mask = 36;
1768 else
1769 mask = 32;
1770
1771 if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(mask)))
1772 dev_err(&intel_private.pcidev->dev,
1773 "set gfx device dma mask %d-bit failed!\n", mask);
1774 else
1775 pci_set_consistent_dma_mask(intel_private.pcidev,
1776 DMA_BIT_MASK(mask));
1777
1778 if (bridge->driver == &intel_810_driver)
1779 return 1;
1780
1781 intel_private.base.gtt_mappable_entries = intel_gtt_mappable_entries();
1782
1783 return 1;
1784 }
1785 EXPORT_SYMBOL(intel_gmch_probe);
1786
1787 void intel_gmch_remove(struct pci_dev *pdev)
1788 {
1789 if (intel_private.pcidev)
1790 pci_dev_put(intel_private.pcidev);
1791 if (intel_private.bridge_dev)
1792 pci_dev_put(intel_private.bridge_dev);
1793 }
1794 EXPORT_SYMBOL(intel_gmch_remove);
1795
1796 MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
1797 MODULE_LICENSE("GPL and additional rights");
Linux kernel - Deliverables
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