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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 <linux/delay.h>
25#include <asm/smp.h>
26#include "agp.h"
27#include "intel-agp.h"
28#include <drm/intel-gtt.h>
29
30
31
32
33
34
35
36#ifdef CONFIG_DMAR
37#define USE_PCI_DMA_API 1
38#else
39#define USE_PCI_DMA_API 0
40#endif
41
42struct intel_gtt_driver {
43 unsigned int gen : 8;
44 unsigned int is_g33 : 1;
45 unsigned int is_pineview : 1;
46 unsigned int is_ironlake : 1;
47 unsigned int has_pgtbl_enable : 1;
48 unsigned int dma_mask_size : 8;
49
50 int (*setup)(void);
51
52
53 void (*cleanup)(void);
54 void (*write_entry)(dma_addr_t addr, unsigned int entry, unsigned int flags);
55
56
57
58 bool (*check_flags)(unsigned int flags);
59 void (*chipset_flush)(void);
60};
61
62static struct _intel_private {
63 struct intel_gtt base;
64 const struct intel_gtt_driver *driver;
65 struct pci_dev *pcidev;
66 struct pci_dev *bridge_dev;
67 u8 __iomem *registers;
68 phys_addr_t gtt_bus_addr;
69 phys_addr_t gma_bus_addr;
70 u32 PGETBL_save;
71 u32 __iomem *gtt;
72 bool clear_fake_agp;
73 int num_dcache_entries;
74 void __iomem *i9xx_flush_page;
75 char *i81x_gtt_table;
76 struct resource ifp_resource;
77 int resource_valid;
78 struct page *scratch_page;
79 dma_addr_t scratch_page_dma;
80} intel_private;
81
82#define INTEL_GTT_GEN intel_private.driver->gen
83#define IS_G33 intel_private.driver->is_g33
84#define IS_PINEVIEW intel_private.driver->is_pineview
85#define IS_IRONLAKE intel_private.driver->is_ironlake
86#define HAS_PGTBL_EN intel_private.driver->has_pgtbl_enable
87
88int intel_gtt_map_memory(struct page **pages, unsigned int num_entries,
89 struct scatterlist **sg_list, int *num_sg)
90{
91 struct sg_table st;
92 struct scatterlist *sg;
93 int i;
94
95 if (*sg_list)
96 return 0;
97
98 DBG("try mapping %lu pages\n", (unsigned long)num_entries);
99
100 if (sg_alloc_table(&st, num_entries, GFP_KERNEL))
101 goto err;
102
103 *sg_list = sg = st.sgl;
104
105 for (i = 0 ; i < num_entries; i++, sg = sg_next(sg))
106 sg_set_page(sg, pages[i], PAGE_SIZE, 0);
107
108 *num_sg = pci_map_sg(intel_private.pcidev, *sg_list,
109 num_entries, PCI_DMA_BIDIRECTIONAL);
110 if (unlikely(!*num_sg))
111 goto err;
112
113 return 0;
114
115err:
116 sg_free_table(&st);
117 return -ENOMEM;
118}
119EXPORT_SYMBOL(intel_gtt_map_memory);
120
121void intel_gtt_unmap_memory(struct scatterlist *sg_list, int num_sg)
122{
123 struct sg_table st;
124 DBG("try unmapping %lu pages\n", (unsigned long)mem->page_count);
125
126 pci_unmap_sg(intel_private.pcidev, sg_list,
127 num_sg, PCI_DMA_BIDIRECTIONAL);
128
129 st.sgl = sg_list;
130 st.orig_nents = st.nents = num_sg;
131
132 sg_free_table(&st);
133}
134EXPORT_SYMBOL(intel_gtt_unmap_memory);
135
136static void intel_fake_agp_enable(struct agp_bridge_data *bridge, u32 mode)
137{
138 return;
139}
140
141
142static struct page *i8xx_alloc_pages(void)
143{
144 struct page *page;
145
146 page = alloc_pages(GFP_KERNEL | GFP_DMA32, 2);
147 if (page == NULL)
148 return NULL;
149
150 if (set_pages_uc(page, 4) < 0) {
151 set_pages_wb(page, 4);
152 __free_pages(page, 2);
153 return NULL;
154 }
155 get_page(page);
156 atomic_inc(&agp_bridge->current_memory_agp);
157 return page;
158}
159
160static void i8xx_destroy_pages(struct page *page)
161{
162 if (page == NULL)
163 return;
164
165 set_pages_wb(page, 4);
166 put_page(page);
167 __free_pages(page, 2);
168 atomic_dec(&agp_bridge->current_memory_agp);
169}
170
171#define I810_GTT_ORDER 4
172static int i810_setup(void)
173{
174 u32 reg_addr;
175 char *gtt_table;
176
177
178 gtt_table = alloc_gatt_pages(I810_GTT_ORDER);
179 if (gtt_table == NULL)
180 return -ENOMEM;
181 intel_private.i81x_gtt_table = gtt_table;
182
183 pci_read_config_dword(intel_private.pcidev, I810_MMADDR, ®_addr);
184 reg_addr &= 0xfff80000;
185
186 intel_private.registers = ioremap(reg_addr, KB(64));
187 if (!intel_private.registers)
188 return -ENOMEM;
189
190 writel(virt_to_phys(gtt_table) | I810_PGETBL_ENABLED,
191 intel_private.registers+I810_PGETBL_CTL);
192
193 intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE;
194
195 if ((readl(intel_private.registers+I810_DRAM_CTL)
196 & I810_DRAM_ROW_0) == I810_DRAM_ROW_0_SDRAM) {
197 dev_info(&intel_private.pcidev->dev,
198 "detected 4MB dedicated video ram\n");
199 intel_private.num_dcache_entries = 1024;
200 }
201
202 return 0;
203}
204
205static void i810_cleanup(void)
206{
207 writel(0, intel_private.registers+I810_PGETBL_CTL);
208 free_gatt_pages(intel_private.i81x_gtt_table, I810_GTT_ORDER);
209}
210
211static int i810_insert_dcache_entries(struct agp_memory *mem, off_t pg_start,
212 int type)
213{
214 int i;
215
216 if ((pg_start + mem->page_count)
217 > intel_private.num_dcache_entries)
218 return -EINVAL;
219
220 if (!mem->is_flushed)
221 global_cache_flush();
222
223 for (i = pg_start; i < (pg_start + mem->page_count); i++) {
224 dma_addr_t addr = i << PAGE_SHIFT;
225 intel_private.driver->write_entry(addr,
226 i, type);
227 }
228 readl(intel_private.gtt+i-1);
229
230 return 0;
231}
232
233
234
235
236
237
238static struct agp_memory *alloc_agpphysmem_i8xx(size_t pg_count, int type)
239{
240 struct agp_memory *new;
241 struct page *page;
242
243 switch (pg_count) {
244 case 1: page = agp_bridge->driver->agp_alloc_page(agp_bridge);
245 break;
246 case 4:
247
248 page = i8xx_alloc_pages();
249 break;
250 default:
251 return NULL;
252 }
253
254 if (page == NULL)
255 return NULL;
256
257 new = agp_create_memory(pg_count);
258 if (new == NULL)
259 return NULL;
260
261 new->pages[0] = page;
262 if (pg_count == 4) {
263
264 new->pages[1] = new->pages[0] + 1;
265 new->pages[2] = new->pages[1] + 1;
266 new->pages[3] = new->pages[2] + 1;
267 }
268 new->page_count = pg_count;
269 new->num_scratch_pages = pg_count;
270 new->type = AGP_PHYS_MEMORY;
271 new->physical = page_to_phys(new->pages[0]);
272 return new;
273}
274
275static void intel_i810_free_by_type(struct agp_memory *curr)
276{
277 agp_free_key(curr->key);
278 if (curr->type == AGP_PHYS_MEMORY) {
279 if (curr->page_count == 4)
280 i8xx_destroy_pages(curr->pages[0]);
281 else {
282 agp_bridge->driver->agp_destroy_page(curr->pages[0],
283 AGP_PAGE_DESTROY_UNMAP);
284 agp_bridge->driver->agp_destroy_page(curr->pages[0],
285 AGP_PAGE_DESTROY_FREE);
286 }
287 agp_free_page_array(curr);
288 }
289 kfree(curr);
290}
291
292static int intel_gtt_setup_scratch_page(void)
293{
294 struct page *page;
295 dma_addr_t dma_addr;
296
297 page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
298 if (page == NULL)
299 return -ENOMEM;
300 get_page(page);
301 set_pages_uc(page, 1);
302
303 if (intel_private.base.needs_dmar) {
304 dma_addr = pci_map_page(intel_private.pcidev, page, 0,
305 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
306 if (pci_dma_mapping_error(intel_private.pcidev, dma_addr))
307 return -EINVAL;
308
309 intel_private.scratch_page_dma = dma_addr;
310 } else
311 intel_private.scratch_page_dma = page_to_phys(page);
312
313 intel_private.scratch_page = page;
314
315 return 0;
316}
317
318static void i810_write_entry(dma_addr_t addr, unsigned int entry,
319 unsigned int flags)
320{
321 u32 pte_flags = I810_PTE_VALID;
322
323 switch (flags) {
324 case AGP_DCACHE_MEMORY:
325 pte_flags |= I810_PTE_LOCAL;
326 break;
327 case AGP_USER_CACHED_MEMORY:
328 pte_flags |= I830_PTE_SYSTEM_CACHED;
329 break;
330 }
331
332 writel(addr | pte_flags, intel_private.gtt + entry);
333}
334
335static const struct aper_size_info_fixed intel_fake_agp_sizes[] = {
336 {32, 8192, 3},
337 {64, 16384, 4},
338 {128, 32768, 5},
339 {256, 65536, 6},
340 {512, 131072, 7},
341};
342
343static unsigned int intel_gtt_stolen_size(void)
344{
345 u16 gmch_ctrl;
346 u8 rdct;
347 int local = 0;
348 static const int ddt[4] = { 0, 16, 32, 64 };
349 unsigned int stolen_size = 0;
350
351 if (INTEL_GTT_GEN == 1)
352 return 0;
353
354 pci_read_config_word(intel_private.bridge_dev,
355 I830_GMCH_CTRL, &gmch_ctrl);
356
357 if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB ||
358 intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) {
359 switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
360 case I830_GMCH_GMS_STOLEN_512:
361 stolen_size = KB(512);
362 break;
363 case I830_GMCH_GMS_STOLEN_1024:
364 stolen_size = MB(1);
365 break;
366 case I830_GMCH_GMS_STOLEN_8192:
367 stolen_size = MB(8);
368 break;
369 case I830_GMCH_GMS_LOCAL:
370 rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE);
371 stolen_size = (I830_RDRAM_ND(rdct) + 1) *
372 MB(ddt[I830_RDRAM_DDT(rdct)]);
373 local = 1;
374 break;
375 default:
376 stolen_size = 0;
377 break;
378 }
379 } else if (INTEL_GTT_GEN == 6) {
380
381
382
383 u16 snb_gmch_ctl;
384 pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);
385 switch (snb_gmch_ctl & SNB_GMCH_GMS_STOLEN_MASK) {
386 case SNB_GMCH_GMS_STOLEN_32M:
387 stolen_size = MB(32);
388 break;
389 case SNB_GMCH_GMS_STOLEN_64M:
390 stolen_size = MB(64);
391 break;
392 case SNB_GMCH_GMS_STOLEN_96M:
393 stolen_size = MB(96);
394 break;
395 case SNB_GMCH_GMS_STOLEN_128M:
396 stolen_size = MB(128);
397 break;
398 case SNB_GMCH_GMS_STOLEN_160M:
399 stolen_size = MB(160);
400 break;
401 case SNB_GMCH_GMS_STOLEN_192M:
402 stolen_size = MB(192);
403 break;
404 case SNB_GMCH_GMS_STOLEN_224M:
405 stolen_size = MB(224);
406 break;
407 case SNB_GMCH_GMS_STOLEN_256M:
408 stolen_size = MB(256);
409 break;
410 case SNB_GMCH_GMS_STOLEN_288M:
411 stolen_size = MB(288);
412 break;
413 case SNB_GMCH_GMS_STOLEN_320M:
414 stolen_size = MB(320);
415 break;
416 case SNB_GMCH_GMS_STOLEN_352M:
417 stolen_size = MB(352);
418 break;
419 case SNB_GMCH_GMS_STOLEN_384M:
420 stolen_size = MB(384);
421 break;
422 case SNB_GMCH_GMS_STOLEN_416M:
423 stolen_size = MB(416);
424 break;
425 case SNB_GMCH_GMS_STOLEN_448M:
426 stolen_size = MB(448);
427 break;
428 case SNB_GMCH_GMS_STOLEN_480M:
429 stolen_size = MB(480);
430 break;
431 case SNB_GMCH_GMS_STOLEN_512M:
432 stolen_size = MB(512);
433 break;
434 }
435 } else {
436 switch (gmch_ctrl & I855_GMCH_GMS_MASK) {
437 case I855_GMCH_GMS_STOLEN_1M:
438 stolen_size = MB(1);
439 break;
440 case I855_GMCH_GMS_STOLEN_4M:
441 stolen_size = MB(4);
442 break;
443 case I855_GMCH_GMS_STOLEN_8M:
444 stolen_size = MB(8);
445 break;
446 case I855_GMCH_GMS_STOLEN_16M:
447 stolen_size = MB(16);
448 break;
449 case I855_GMCH_GMS_STOLEN_32M:
450 stolen_size = MB(32);
451 break;
452 case I915_GMCH_GMS_STOLEN_48M:
453 stolen_size = MB(48);
454 break;
455 case I915_GMCH_GMS_STOLEN_64M:
456 stolen_size = MB(64);
457 break;
458 case G33_GMCH_GMS_STOLEN_128M:
459 stolen_size = MB(128);
460 break;
461 case G33_GMCH_GMS_STOLEN_256M:
462 stolen_size = MB(256);
463 break;
464 case INTEL_GMCH_GMS_STOLEN_96M:
465 stolen_size = MB(96);
466 break;
467 case INTEL_GMCH_GMS_STOLEN_160M:
468 stolen_size = MB(160);
469 break;
470 case INTEL_GMCH_GMS_STOLEN_224M:
471 stolen_size = MB(224);
472 break;
473 case INTEL_GMCH_GMS_STOLEN_352M:
474 stolen_size = MB(352);
475 break;
476 default:
477 stolen_size = 0;
478 break;
479 }
480 }
481
482 if (stolen_size > 0) {
483 dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n",
484 stolen_size / KB(1), local ? "local" : "stolen");
485 } else {
486 dev_info(&intel_private.bridge_dev->dev,
487 "no pre-allocated video memory detected\n");
488 stolen_size = 0;
489 }
490
491 return stolen_size;
492}
493
494static void i965_adjust_pgetbl_size(unsigned int size_flag)
495{
496 u32 pgetbl_ctl, pgetbl_ctl2;
497
498
499 pgetbl_ctl2 = readl(intel_private.registers+I965_PGETBL_CTL2);
500 pgetbl_ctl2 &= ~I810_PGETBL_ENABLED;
501 writel(pgetbl_ctl2, intel_private.registers+I965_PGETBL_CTL2);
502
503
504 pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL);
505 pgetbl_ctl &= ~I965_PGETBL_SIZE_MASK;
506 pgetbl_ctl |= size_flag;
507 writel(pgetbl_ctl, intel_private.registers+I810_PGETBL_CTL);
508}
509
510static unsigned int i965_gtt_total_entries(void)
511{
512 int size;
513 u32 pgetbl_ctl;
514 u16 gmch_ctl;
515
516 pci_read_config_word(intel_private.bridge_dev,
517 I830_GMCH_CTRL, &gmch_ctl);
518
519 if (INTEL_GTT_GEN == 5) {
520 switch (gmch_ctl & G4x_GMCH_SIZE_MASK) {
521 case G4x_GMCH_SIZE_1M:
522 case G4x_GMCH_SIZE_VT_1M:
523 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1MB);
524 break;
525 case G4x_GMCH_SIZE_VT_1_5M:
526 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1_5MB);
527 break;
528 case G4x_GMCH_SIZE_2M:
529 case G4x_GMCH_SIZE_VT_2M:
530 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_2MB);
531 break;
532 }
533 }
534
535 pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL);
536
537 switch (pgetbl_ctl & I965_PGETBL_SIZE_MASK) {
538 case I965_PGETBL_SIZE_128KB:
539 size = KB(128);
540 break;
541 case I965_PGETBL_SIZE_256KB:
542 size = KB(256);
543 break;
544 case I965_PGETBL_SIZE_512KB:
545 size = KB(512);
546 break;
547
548 case I965_PGETBL_SIZE_1MB:
549 size = KB(1024);
550 break;
551 case I965_PGETBL_SIZE_2MB:
552 size = KB(2048);
553 break;
554 case I965_PGETBL_SIZE_1_5MB:
555 size = KB(1024 + 512);
556 break;
557 default:
558 dev_info(&intel_private.pcidev->dev,
559 "unknown page table size, assuming 512KB\n");
560 size = KB(512);
561 }
562
563 return size/4;
564}
565
566static unsigned int intel_gtt_total_entries(void)
567{
568 int size;
569
570 if (IS_G33 || INTEL_GTT_GEN == 4 || INTEL_GTT_GEN == 5)
571 return i965_gtt_total_entries();
572 else if (INTEL_GTT_GEN == 6) {
573 u16 snb_gmch_ctl;
574
575 pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);
576 switch (snb_gmch_ctl & SNB_GTT_SIZE_MASK) {
577 default:
578 case SNB_GTT_SIZE_0M:
579 printk(KERN_ERR "Bad GTT size mask: 0x%04x.\n", snb_gmch_ctl);
580 size = MB(0);
581 break;
582 case SNB_GTT_SIZE_1M:
583 size = MB(1);
584 break;
585 case SNB_GTT_SIZE_2M:
586 size = MB(2);
587 break;
588 }
589 return size/4;
590 } else {
591
592
593
594 return intel_private.base.gtt_mappable_entries;
595 }
596}
597
598static unsigned int intel_gtt_mappable_entries(void)
599{
600 unsigned int aperture_size;
601
602 if (INTEL_GTT_GEN == 1) {
603 u32 smram_miscc;
604
605 pci_read_config_dword(intel_private.bridge_dev,
606 I810_SMRAM_MISCC, &smram_miscc);
607
608 if ((smram_miscc & I810_GFX_MEM_WIN_SIZE)
609 == I810_GFX_MEM_WIN_32M)
610 aperture_size = MB(32);
611 else
612 aperture_size = MB(64);
613 } else if (INTEL_GTT_GEN == 2) {
614 u16 gmch_ctrl;
615
616 pci_read_config_word(intel_private.bridge_dev,
617 I830_GMCH_CTRL, &gmch_ctrl);
618
619 if ((gmch_ctrl & I830_GMCH_MEM_MASK) == I830_GMCH_MEM_64M)
620 aperture_size = MB(64);
621 else
622 aperture_size = MB(128);
623 } else {
624
625 aperture_size = pci_resource_len(intel_private.pcidev, 2);
626 }
627
628 return aperture_size >> PAGE_SHIFT;
629}
630
631static void intel_gtt_teardown_scratch_page(void)
632{
633 set_pages_wb(intel_private.scratch_page, 1);
634 pci_unmap_page(intel_private.pcidev, intel_private.scratch_page_dma,
635 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
636 put_page(intel_private.scratch_page);
637 __free_page(intel_private.scratch_page);
638}
639
640static void intel_gtt_cleanup(void)
641{
642 intel_private.driver->cleanup();
643
644 iounmap(intel_private.gtt);
645 iounmap(intel_private.registers);
646
647 intel_gtt_teardown_scratch_page();
648}
649
650static int intel_gtt_init(void)
651{
652 u32 gtt_map_size;
653 int ret;
654
655 ret = intel_private.driver->setup();
656 if (ret != 0)
657 return ret;
658
659 intel_private.base.gtt_mappable_entries = intel_gtt_mappable_entries();
660 intel_private.base.gtt_total_entries = intel_gtt_total_entries();
661
662
663 intel_private.PGETBL_save =
664 readl(intel_private.registers+I810_PGETBL_CTL)
665 & ~I810_PGETBL_ENABLED;
666
667 if (HAS_PGTBL_EN)
668 intel_private.PGETBL_save |= I810_PGETBL_ENABLED;
669
670 dev_info(&intel_private.bridge_dev->dev,
671 "detected gtt size: %dK total, %dK mappable\n",
672 intel_private.base.gtt_total_entries * 4,
673 intel_private.base.gtt_mappable_entries * 4);
674
675 gtt_map_size = intel_private.base.gtt_total_entries * 4;
676
677 intel_private.gtt = ioremap(intel_private.gtt_bus_addr,
678 gtt_map_size);
679 if (!intel_private.gtt) {
680 intel_private.driver->cleanup();
681 iounmap(intel_private.registers);
682 return -ENOMEM;
683 }
684
685 global_cache_flush();
686
687 intel_private.base.stolen_size = intel_gtt_stolen_size();
688
689 intel_private.base.needs_dmar = USE_PCI_DMA_API && INTEL_GTT_GEN > 2;
690
691 ret = intel_gtt_setup_scratch_page();
692 if (ret != 0) {
693 intel_gtt_cleanup();
694 return ret;
695 }
696
697 return 0;
698}
699
700static int intel_fake_agp_fetch_size(void)
701{
702 int num_sizes = ARRAY_SIZE(intel_fake_agp_sizes);
703 unsigned int aper_size;
704 int i;
705
706 aper_size = (intel_private.base.gtt_mappable_entries << PAGE_SHIFT)
707 / MB(1);
708
709 for (i = 0; i < num_sizes; i++) {
710 if (aper_size == intel_fake_agp_sizes[i].size) {
711 agp_bridge->current_size =
712 (void *) (intel_fake_agp_sizes + i);
713 return aper_size;
714 }
715 }
716
717 return 0;
718}
719
720static void i830_cleanup(void)
721{
722}
723
724
725
726
727
728
729
730
731
732
733
734static void i830_chipset_flush(void)
735{
736 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
737
738
739
740
741 wbinvd_on_all_cpus();
742
743
744
745
746
747
748 writel(readl(intel_private.registers+I830_HIC) | (1<<31),
749 intel_private.registers+I830_HIC);
750
751 while (readl(intel_private.registers+I830_HIC) & (1<<31)) {
752 if (time_after(jiffies, timeout))
753 break;
754
755 udelay(50);
756 }
757}
758
759static void i830_write_entry(dma_addr_t addr, unsigned int entry,
760 unsigned int flags)
761{
762 u32 pte_flags = I810_PTE_VALID;
763
764 if (flags == AGP_USER_CACHED_MEMORY)
765 pte_flags |= I830_PTE_SYSTEM_CACHED;
766
767 writel(addr | pte_flags, intel_private.gtt + entry);
768}
769
770static bool intel_enable_gtt(void)
771{
772 u32 gma_addr;
773 u8 __iomem *reg;
774
775 if (INTEL_GTT_GEN <= 2)
776 pci_read_config_dword(intel_private.pcidev, I810_GMADDR,
777 &gma_addr);
778 else
779 pci_read_config_dword(intel_private.pcidev, I915_GMADDR,
780 &gma_addr);
781
782 intel_private.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK);
783
784 if (INTEL_GTT_GEN >= 6)
785 return true;
786
787 if (INTEL_GTT_GEN == 2) {
788 u16 gmch_ctrl;
789
790 pci_read_config_word(intel_private.bridge_dev,
791 I830_GMCH_CTRL, &gmch_ctrl);
792 gmch_ctrl |= I830_GMCH_ENABLED;
793 pci_write_config_word(intel_private.bridge_dev,
794 I830_GMCH_CTRL, gmch_ctrl);
795
796 pci_read_config_word(intel_private.bridge_dev,
797 I830_GMCH_CTRL, &gmch_ctrl);
798 if ((gmch_ctrl & I830_GMCH_ENABLED) == 0) {
799 dev_err(&intel_private.pcidev->dev,
800 "failed to enable the GTT: GMCH_CTRL=%x\n",
801 gmch_ctrl);
802 return false;
803 }
804 }
805
806
807
808
809 if (INTEL_GTT_GEN >= 3)
810 writel(0, intel_private.registers+GFX_FLSH_CNTL);
811
812 reg = intel_private.registers+I810_PGETBL_CTL;
813 writel(intel_private.PGETBL_save, reg);
814 if (HAS_PGTBL_EN && (readl(reg) & I810_PGETBL_ENABLED) == 0) {
815 dev_err(&intel_private.pcidev->dev,
816 "failed to enable the GTT: PGETBL=%x [expected %x]\n",
817 readl(reg), intel_private.PGETBL_save);
818 return false;
819 }
820
821 if (INTEL_GTT_GEN >= 3)
822 writel(0, intel_private.registers+GFX_FLSH_CNTL);
823
824 return true;
825}
826
827static int i830_setup(void)
828{
829 u32 reg_addr;
830
831 pci_read_config_dword(intel_private.pcidev, I810_MMADDR, ®_addr);
832 reg_addr &= 0xfff80000;
833
834 intel_private.registers = ioremap(reg_addr, KB(64));
835 if (!intel_private.registers)
836 return -ENOMEM;
837
838 intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE;
839
840 return 0;
841}
842
843static int intel_fake_agp_create_gatt_table(struct agp_bridge_data *bridge)
844{
845 agp_bridge->gatt_table_real = NULL;
846 agp_bridge->gatt_table = NULL;
847 agp_bridge->gatt_bus_addr = 0;
848
849 return 0;
850}
851
852static int intel_fake_agp_free_gatt_table(struct agp_bridge_data *bridge)
853{
854 return 0;
855}
856
857static int intel_fake_agp_configure(void)
858{
859 if (!intel_enable_gtt())
860 return -EIO;
861
862 intel_private.clear_fake_agp = true;
863 agp_bridge->gart_bus_addr = intel_private.gma_bus_addr;
864
865 return 0;
866}
867
868static bool i830_check_flags(unsigned int flags)
869{
870 switch (flags) {
871 case 0:
872 case AGP_PHYS_MEMORY:
873 case AGP_USER_CACHED_MEMORY:
874 case AGP_USER_MEMORY:
875 return true;
876 }
877
878 return false;
879}
880
881void intel_gtt_insert_sg_entries(struct scatterlist *sg_list,
882 unsigned int sg_len,
883 unsigned int pg_start,
884 unsigned int flags)
885{
886 struct scatterlist *sg;
887 unsigned int len, m;
888 int i, j;
889
890 j = pg_start;
891
892
893
894 for_each_sg(sg_list, sg, sg_len, i) {
895 len = sg_dma_len(sg) >> PAGE_SHIFT;
896 for (m = 0; m < len; m++) {
897 dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT);
898 intel_private.driver->write_entry(addr,
899 j, flags);
900 j++;
901 }
902 }
903 readl(intel_private.gtt+j-1);
904}
905EXPORT_SYMBOL(intel_gtt_insert_sg_entries);
906
907void intel_gtt_insert_pages(unsigned int first_entry, unsigned int num_entries,
908 struct page **pages, unsigned int flags)
909{
910 int i, j;
911
912 for (i = 0, j = first_entry; i < num_entries; i++, j++) {
913 dma_addr_t addr = page_to_phys(pages[i]);
914 intel_private.driver->write_entry(addr,
915 j, flags);
916 }
917 readl(intel_private.gtt+j-1);
918}
919EXPORT_SYMBOL(intel_gtt_insert_pages);
920
921static int intel_fake_agp_insert_entries(struct agp_memory *mem,
922 off_t pg_start, int type)
923{
924 int ret = -EINVAL;
925
926 if (intel_private.clear_fake_agp) {
927 int start = intel_private.base.stolen_size / PAGE_SIZE;
928 int end = intel_private.base.gtt_mappable_entries;
929 intel_gtt_clear_range(start, end - start);
930 intel_private.clear_fake_agp = false;
931 }
932
933 if (INTEL_GTT_GEN == 1 && type == AGP_DCACHE_MEMORY)
934 return i810_insert_dcache_entries(mem, pg_start, type);
935
936 if (mem->page_count == 0)
937 goto out;
938
939 if (pg_start + mem->page_count > intel_private.base.gtt_total_entries)
940 goto out_err;
941
942 if (type != mem->type)
943 goto out_err;
944
945 if (!intel_private.driver->check_flags(type))
946 goto out_err;
947
948 if (!mem->is_flushed)
949 global_cache_flush();
950
951 if (intel_private.base.needs_dmar) {
952 ret = intel_gtt_map_memory(mem->pages, mem->page_count,
953 &mem->sg_list, &mem->num_sg);
954 if (ret != 0)
955 return ret;
956
957 intel_gtt_insert_sg_entries(mem->sg_list, mem->num_sg,
958 pg_start, type);
959 } else
960 intel_gtt_insert_pages(pg_start, mem->page_count, mem->pages,
961 type);
962
963out:
964 ret = 0;
965out_err:
966 mem->is_flushed = true;
967 return ret;
968}
969
970void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries)
971{
972 unsigned int i;
973
974 for (i = first_entry; i < (first_entry + num_entries); i++) {
975 intel_private.driver->write_entry(intel_private.scratch_page_dma,
976 i, 0);
977 }
978 readl(intel_private.gtt+i-1);
979}
980EXPORT_SYMBOL(intel_gtt_clear_range);
981
982static int intel_fake_agp_remove_entries(struct agp_memory *mem,
983 off_t pg_start, int type)
984{
985 if (mem->page_count == 0)
986 return 0;
987
988 intel_gtt_clear_range(pg_start, mem->page_count);
989
990 if (intel_private.base.needs_dmar) {
991 intel_gtt_unmap_memory(mem->sg_list, mem->num_sg);
992 mem->sg_list = NULL;
993 mem->num_sg = 0;
994 }
995
996 return 0;
997}
998
999static struct agp_memory *intel_fake_agp_alloc_by_type(size_t pg_count,
1000 int type)
1001{
1002 struct agp_memory *new;
1003
1004 if (type == AGP_DCACHE_MEMORY && INTEL_GTT_GEN == 1) {
1005 if (pg_count != intel_private.num_dcache_entries)
1006 return NULL;
1007
1008 new = agp_create_memory(1);
1009 if (new == NULL)
1010 return NULL;
1011
1012 new->type = AGP_DCACHE_MEMORY;
1013 new->page_count = pg_count;
1014 new->num_scratch_pages = 0;
1015 agp_free_page_array(new);
1016 return new;
1017 }
1018 if (type == AGP_PHYS_MEMORY)
1019 return alloc_agpphysmem_i8xx(pg_count, type);
1020
1021 return NULL;
1022}
1023
1024static int intel_alloc_chipset_flush_resource(void)
1025{
1026 int ret;
1027 ret = pci_bus_alloc_resource(intel_private.bridge_dev->bus, &intel_private.ifp_resource, PAGE_SIZE,
1028 PAGE_SIZE, PCIBIOS_MIN_MEM, 0,
1029 pcibios_align_resource, intel_private.bridge_dev);
1030
1031 return ret;
1032}
1033
1034static void intel_i915_setup_chipset_flush(void)
1035{
1036 int ret;
1037 u32 temp;
1038
1039 pci_read_config_dword(intel_private.bridge_dev, I915_IFPADDR, &temp);
1040 if (!(temp & 0x1)) {
1041 intel_alloc_chipset_flush_resource();
1042 intel_private.resource_valid = 1;
1043 pci_write_config_dword(intel_private.bridge_dev, I915_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1);
1044 } else {
1045 temp &= ~1;
1046
1047 intel_private.resource_valid = 1;
1048 intel_private.ifp_resource.start = temp;
1049 intel_private.ifp_resource.end = temp + PAGE_SIZE;
1050 ret = request_resource(&iomem_resource, &intel_private.ifp_resource);
1051
1052 if (ret)
1053 intel_private.resource_valid = 0;
1054 }
1055}
1056
1057static void intel_i965_g33_setup_chipset_flush(void)
1058{
1059 u32 temp_hi, temp_lo;
1060 int ret;
1061
1062 pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4, &temp_hi);
1063 pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR, &temp_lo);
1064
1065 if (!(temp_lo & 0x1)) {
1066
1067 intel_alloc_chipset_flush_resource();
1068
1069 intel_private.resource_valid = 1;
1070 pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4,
1071 upper_32_bits(intel_private.ifp_resource.start));
1072 pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1);
1073 } else {
1074 u64 l64;
1075
1076 temp_lo &= ~0x1;
1077 l64 = ((u64)temp_hi << 32) | temp_lo;
1078
1079 intel_private.resource_valid = 1;
1080 intel_private.ifp_resource.start = l64;
1081 intel_private.ifp_resource.end = l64 + PAGE_SIZE;
1082 ret = request_resource(&iomem_resource, &intel_private.ifp_resource);
1083
1084 if (ret)
1085 intel_private.resource_valid = 0;
1086 }
1087}
1088
1089static void intel_i9xx_setup_flush(void)
1090{
1091
1092 if (intel_private.ifp_resource.start)
1093 return;
1094
1095 if (INTEL_GTT_GEN == 6)
1096 return;
1097
1098
1099 intel_private.ifp_resource.name = "Intel Flush Page";
1100 intel_private.ifp_resource.flags = IORESOURCE_MEM;
1101
1102
1103 if (IS_G33 || INTEL_GTT_GEN >= 4) {
1104 intel_i965_g33_setup_chipset_flush();
1105 } else {
1106 intel_i915_setup_chipset_flush();
1107 }
1108
1109 if (intel_private.ifp_resource.start)
1110 intel_private.i9xx_flush_page = ioremap_nocache(intel_private.ifp_resource.start, PAGE_SIZE);
1111 if (!intel_private.i9xx_flush_page)
1112 dev_err(&intel_private.pcidev->dev,
1113 "can't ioremap flush page - no chipset flushing\n");
1114}
1115
1116static void i9xx_cleanup(void)
1117{
1118 if (intel_private.i9xx_flush_page)
1119 iounmap(intel_private.i9xx_flush_page);
1120 if (intel_private.resource_valid)
1121 release_resource(&intel_private.ifp_resource);
1122 intel_private.ifp_resource.start = 0;
1123 intel_private.resource_valid = 0;
1124}
1125
1126static void i9xx_chipset_flush(void)
1127{
1128 if (intel_private.i9xx_flush_page)
1129 writel(1, intel_private.i9xx_flush_page);
1130}
1131
1132static void i965_write_entry(dma_addr_t addr,
1133 unsigned int entry,
1134 unsigned int flags)
1135{
1136 u32 pte_flags;
1137
1138 pte_flags = I810_PTE_VALID;
1139 if (flags == AGP_USER_CACHED_MEMORY)
1140 pte_flags |= I830_PTE_SYSTEM_CACHED;
1141
1142
1143 addr |= (addr >> 28) & 0xf0;
1144 writel(addr | pte_flags, intel_private.gtt + entry);
1145}
1146
1147static bool gen6_check_flags(unsigned int flags)
1148{
1149 return true;
1150}
1151
1152static void gen6_write_entry(dma_addr_t addr, unsigned int entry,
1153 unsigned int flags)
1154{
1155 unsigned int type_mask = flags & ~AGP_USER_CACHED_MEMORY_GFDT;
1156 unsigned int gfdt = flags & AGP_USER_CACHED_MEMORY_GFDT;
1157 u32 pte_flags;
1158
1159 if (type_mask == AGP_USER_MEMORY)
1160 pte_flags = GEN6_PTE_UNCACHED | I810_PTE_VALID;
1161 else if (type_mask == AGP_USER_CACHED_MEMORY_LLC_MLC) {
1162 pte_flags = GEN6_PTE_LLC_MLC | I810_PTE_VALID;
1163 if (gfdt)
1164 pte_flags |= GEN6_PTE_GFDT;
1165 } else {
1166 pte_flags = GEN6_PTE_LLC | I810_PTE_VALID;
1167 if (gfdt)
1168 pte_flags |= GEN6_PTE_GFDT;
1169 }
1170
1171
1172 addr |= (addr >> 28) & 0xff0;
1173 writel(addr | pte_flags, intel_private.gtt + entry);
1174}
1175
1176static void gen6_cleanup(void)
1177{
1178}
1179
1180static int i9xx_setup(void)
1181{
1182 u32 reg_addr;
1183
1184 pci_read_config_dword(intel_private.pcidev, I915_MMADDR, ®_addr);
1185
1186 reg_addr &= 0xfff80000;
1187
1188 intel_private.registers = ioremap(reg_addr, 128 * 4096);
1189 if (!intel_private.registers)
1190 return -ENOMEM;
1191
1192 if (INTEL_GTT_GEN == 3) {
1193 u32 gtt_addr;
1194
1195 pci_read_config_dword(intel_private.pcidev,
1196 I915_PTEADDR, >t_addr);
1197 intel_private.gtt_bus_addr = gtt_addr;
1198 } else {
1199 u32 gtt_offset;
1200
1201 switch (INTEL_GTT_GEN) {
1202 case 5:
1203 case 6:
1204 gtt_offset = MB(2);
1205 break;
1206 case 4:
1207 default:
1208 gtt_offset = KB(512);
1209 break;
1210 }
1211 intel_private.gtt_bus_addr = reg_addr + gtt_offset;
1212 }
1213
1214 intel_i9xx_setup_flush();
1215
1216 return 0;
1217}
1218
1219static const struct agp_bridge_driver intel_fake_agp_driver = {
1220 .owner = THIS_MODULE,
1221 .size_type = FIXED_APER_SIZE,
1222 .aperture_sizes = intel_fake_agp_sizes,
1223 .num_aperture_sizes = ARRAY_SIZE(intel_fake_agp_sizes),
1224 .configure = intel_fake_agp_configure,
1225 .fetch_size = intel_fake_agp_fetch_size,
1226 .cleanup = intel_gtt_cleanup,
1227 .agp_enable = intel_fake_agp_enable,
1228 .cache_flush = global_cache_flush,
1229 .create_gatt_table = intel_fake_agp_create_gatt_table,
1230 .free_gatt_table = intel_fake_agp_free_gatt_table,
1231 .insert_memory = intel_fake_agp_insert_entries,
1232 .remove_memory = intel_fake_agp_remove_entries,
1233 .alloc_by_type = intel_fake_agp_alloc_by_type,
1234 .free_by_type = intel_i810_free_by_type,
1235 .agp_alloc_page = agp_generic_alloc_page,
1236 .agp_alloc_pages = agp_generic_alloc_pages,
1237 .agp_destroy_page = agp_generic_destroy_page,
1238 .agp_destroy_pages = agp_generic_destroy_pages,
1239};
1240
1241static const struct intel_gtt_driver i81x_gtt_driver = {
1242 .gen = 1,
1243 .has_pgtbl_enable = 1,
1244 .dma_mask_size = 32,
1245 .setup = i810_setup,
1246 .cleanup = i810_cleanup,
1247 .check_flags = i830_check_flags,
1248 .write_entry = i810_write_entry,
1249};
1250static const struct intel_gtt_driver i8xx_gtt_driver = {
1251 .gen = 2,
1252 .has_pgtbl_enable = 1,
1253 .setup = i830_setup,
1254 .cleanup = i830_cleanup,
1255 .write_entry = i830_write_entry,
1256 .dma_mask_size = 32,
1257 .check_flags = i830_check_flags,
1258 .chipset_flush = i830_chipset_flush,
1259};
1260static const struct intel_gtt_driver i915_gtt_driver = {
1261 .gen = 3,
1262 .has_pgtbl_enable = 1,
1263 .setup = i9xx_setup,
1264 .cleanup = i9xx_cleanup,
1265
1266 .write_entry = i830_write_entry,
1267 .dma_mask_size = 32,
1268 .check_flags = i830_check_flags,
1269 .chipset_flush = i9xx_chipset_flush,
1270};
1271static const struct intel_gtt_driver g33_gtt_driver = {
1272 .gen = 3,
1273 .is_g33 = 1,
1274 .setup = i9xx_setup,
1275 .cleanup = i9xx_cleanup,
1276 .write_entry = i965_write_entry,
1277 .dma_mask_size = 36,
1278 .check_flags = i830_check_flags,
1279 .chipset_flush = i9xx_chipset_flush,
1280};
1281static const struct intel_gtt_driver pineview_gtt_driver = {
1282 .gen = 3,
1283 .is_pineview = 1, .is_g33 = 1,
1284 .setup = i9xx_setup,
1285 .cleanup = i9xx_cleanup,
1286 .write_entry = i965_write_entry,
1287 .dma_mask_size = 36,
1288 .check_flags = i830_check_flags,
1289 .chipset_flush = i9xx_chipset_flush,
1290};
1291static const struct intel_gtt_driver i965_gtt_driver = {
1292 .gen = 4,
1293 .has_pgtbl_enable = 1,
1294 .setup = i9xx_setup,
1295 .cleanup = i9xx_cleanup,
1296 .write_entry = i965_write_entry,
1297 .dma_mask_size = 36,
1298 .check_flags = i830_check_flags,
1299 .chipset_flush = i9xx_chipset_flush,
1300};
1301static const struct intel_gtt_driver g4x_gtt_driver = {
1302 .gen = 5,
1303 .setup = i9xx_setup,
1304 .cleanup = i9xx_cleanup,
1305 .write_entry = i965_write_entry,
1306 .dma_mask_size = 36,
1307 .check_flags = i830_check_flags,
1308 .chipset_flush = i9xx_chipset_flush,
1309};
1310static const struct intel_gtt_driver ironlake_gtt_driver = {
1311 .gen = 5,
1312 .is_ironlake = 1,
1313 .setup = i9xx_setup,
1314 .cleanup = i9xx_cleanup,
1315 .write_entry = i965_write_entry,
1316 .dma_mask_size = 36,
1317 .check_flags = i830_check_flags,
1318 .chipset_flush = i9xx_chipset_flush,
1319};
1320static const struct intel_gtt_driver sandybridge_gtt_driver = {
1321 .gen = 6,
1322 .setup = i9xx_setup,
1323 .cleanup = gen6_cleanup,
1324 .write_entry = gen6_write_entry,
1325 .dma_mask_size = 40,
1326 .check_flags = gen6_check_flags,
1327 .chipset_flush = i9xx_chipset_flush,
1328};
1329
1330
1331
1332
1333
1334static const struct intel_gtt_driver_description {
1335 unsigned int gmch_chip_id;
1336 char *name;
1337 const struct intel_gtt_driver *gtt_driver;
1338} intel_gtt_chipsets[] = {
1339 { PCI_DEVICE_ID_INTEL_82810_IG1, "i810",
1340 &i81x_gtt_driver},
1341 { PCI_DEVICE_ID_INTEL_82810_IG3, "i810",
1342 &i81x_gtt_driver},
1343 { PCI_DEVICE_ID_INTEL_82810E_IG, "i810",
1344 &i81x_gtt_driver},
1345 { PCI_DEVICE_ID_INTEL_82815_CGC, "i815",
1346 &i81x_gtt_driver},
1347 { PCI_DEVICE_ID_INTEL_82830_CGC, "830M",
1348 &i8xx_gtt_driver},
1349 { PCI_DEVICE_ID_INTEL_82845G_IG, "845G",
1350 &i8xx_gtt_driver},
1351 { PCI_DEVICE_ID_INTEL_82854_IG, "854",
1352 &i8xx_gtt_driver},
1353 { PCI_DEVICE_ID_INTEL_82855GM_IG, "855GM",
1354 &i8xx_gtt_driver},
1355 { PCI_DEVICE_ID_INTEL_82865_IG, "865",
1356 &i8xx_gtt_driver},
1357 { PCI_DEVICE_ID_INTEL_E7221_IG, "E7221 (i915)",
1358 &i915_gtt_driver },
1359 { PCI_DEVICE_ID_INTEL_82915G_IG, "915G",
1360 &i915_gtt_driver },
1361 { PCI_DEVICE_ID_INTEL_82915GM_IG, "915GM",
1362 &i915_gtt_driver },
1363 { PCI_DEVICE_ID_INTEL_82945G_IG, "945G",
1364 &i915_gtt_driver },
1365 { PCI_DEVICE_ID_INTEL_82945GM_IG, "945GM",
1366 &i915_gtt_driver },
1367 { PCI_DEVICE_ID_INTEL_82945GME_IG, "945GME",
1368 &i915_gtt_driver },
1369 { PCI_DEVICE_ID_INTEL_82946GZ_IG, "946GZ",
1370 &i965_gtt_driver },
1371 { PCI_DEVICE_ID_INTEL_82G35_IG, "G35",
1372 &i965_gtt_driver },
1373 { PCI_DEVICE_ID_INTEL_82965Q_IG, "965Q",
1374 &i965_gtt_driver },
1375 { PCI_DEVICE_ID_INTEL_82965G_IG, "965G",
1376 &i965_gtt_driver },
1377 { PCI_DEVICE_ID_INTEL_82965GM_IG, "965GM",
1378 &i965_gtt_driver },
1379 { PCI_DEVICE_ID_INTEL_82965GME_IG, "965GME/GLE",
1380 &i965_gtt_driver },
1381 { PCI_DEVICE_ID_INTEL_G33_IG, "G33",
1382 &g33_gtt_driver },
1383 { PCI_DEVICE_ID_INTEL_Q35_IG, "Q35",
1384 &g33_gtt_driver },
1385 { PCI_DEVICE_ID_INTEL_Q33_IG, "Q33",
1386 &g33_gtt_driver },
1387 { PCI_DEVICE_ID_INTEL_PINEVIEW_M_IG, "GMA3150",
1388 &pineview_gtt_driver },
1389 { PCI_DEVICE_ID_INTEL_PINEVIEW_IG, "GMA3150",
1390 &pineview_gtt_driver },
1391 { PCI_DEVICE_ID_INTEL_GM45_IG, "GM45",
1392 &g4x_gtt_driver },
1393 { PCI_DEVICE_ID_INTEL_EAGLELAKE_IG, "Eaglelake",
1394 &g4x_gtt_driver },
1395 { PCI_DEVICE_ID_INTEL_Q45_IG, "Q45/Q43",
1396 &g4x_gtt_driver },
1397 { PCI_DEVICE_ID_INTEL_G45_IG, "G45/G43",
1398 &g4x_gtt_driver },
1399 { PCI_DEVICE_ID_INTEL_B43_IG, "B43",
1400 &g4x_gtt_driver },
1401 { PCI_DEVICE_ID_INTEL_B43_1_IG, "B43",
1402 &g4x_gtt_driver },
1403 { PCI_DEVICE_ID_INTEL_G41_IG, "G41",
1404 &g4x_gtt_driver },
1405 { PCI_DEVICE_ID_INTEL_IRONLAKE_D_IG,
1406 "HD Graphics", &ironlake_gtt_driver },
1407 { PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG,
1408 "HD Graphics", &ironlake_gtt_driver },
1409 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT1_IG,
1410 "Sandybridge", &sandybridge_gtt_driver },
1411 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT2_IG,
1412 "Sandybridge", &sandybridge_gtt_driver },
1413 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_GT2_PLUS_IG,
1414 "Sandybridge", &sandybridge_gtt_driver },
1415 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT1_IG,
1416 "Sandybridge", &sandybridge_gtt_driver },
1417 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT2_IG,
1418 "Sandybridge", &sandybridge_gtt_driver },
1419 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_GT2_PLUS_IG,
1420 "Sandybridge", &sandybridge_gtt_driver },
1421 { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_S_IG,
1422 "Sandybridge", &sandybridge_gtt_driver },
1423 { 0, NULL, NULL }
1424};
1425
1426static int find_gmch(u16 device)
1427{
1428 struct pci_dev *gmch_device;
1429
1430 gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL);
1431 if (gmch_device && PCI_FUNC(gmch_device->devfn) != 0) {
1432 gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL,
1433 device, gmch_device);
1434 }
1435
1436 if (!gmch_device)
1437 return 0;
1438
1439 intel_private.pcidev = gmch_device;
1440 return 1;
1441}
1442
1443int intel_gmch_probe(struct pci_dev *pdev,
1444 struct agp_bridge_data *bridge)
1445{
1446 int i, mask;
1447 intel_private.driver = NULL;
1448
1449 for (i = 0; intel_gtt_chipsets[i].name != NULL; i++) {
1450 if (find_gmch(intel_gtt_chipsets[i].gmch_chip_id)) {
1451 intel_private.driver =
1452 intel_gtt_chipsets[i].gtt_driver;
1453 break;
1454 }
1455 }
1456
1457 if (!intel_private.driver)
1458 return 0;
1459
1460 bridge->driver = &intel_fake_agp_driver;
1461 bridge->dev_private_data = &intel_private;
1462 bridge->dev = pdev;
1463
1464 intel_private.bridge_dev = pci_dev_get(pdev);
1465
1466 dev_info(&pdev->dev, "Intel %s Chipset\n", intel_gtt_chipsets[i].name);
1467
1468 mask = intel_private.driver->dma_mask_size;
1469 if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(mask)))
1470 dev_err(&intel_private.pcidev->dev,
1471 "set gfx device dma mask %d-bit failed!\n", mask);
1472 else
1473 pci_set_consistent_dma_mask(intel_private.pcidev,
1474 DMA_BIT_MASK(mask));
1475
1476
1477
1478
1479 if (intel_gtt_init() != 0)
1480 return 0;
1481
1482 return 1;
1483}
1484EXPORT_SYMBOL(intel_gmch_probe);
1485
1486const struct intel_gtt *intel_gtt_get(void)
1487{
1488 return &intel_private.base;
1489}
1490EXPORT_SYMBOL(intel_gtt_get);
1491
1492void intel_gtt_chipset_flush(void)
1493{
1494 if (intel_private.driver->chipset_flush)
1495 intel_private.driver->chipset_flush();
1496}
1497EXPORT_SYMBOL(intel_gtt_chipset_flush);
1498
1499void intel_gmch_remove(struct pci_dev *pdev)
1500{
1501 if (intel_private.pcidev)
1502 pci_dev_put(intel_private.pcidev);
1503 if (intel_private.bridge_dev)
1504 pci_dev_put(intel_private.bridge_dev);
1505}
1506EXPORT_SYMBOL(intel_gmch_remove);
1507
1508MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
1509MODULE_LICENSE("GPL and additional rights");
1510
