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 <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 * 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_INTEL_IOMMU). 34 * Only newer chipsets need to bother with this, of course. 35 */ 36 #ifdef CONFIG_INTEL_IOMMU 37 #define USE_PCI_DMA_API 1 38 #else 39 #define USE_PCI_DMA_API 0 40 #endif 41 42 struct 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 /* Chipset specific GTT setup */ 50 int (*setup)(void); 51 /* This should undo anything done in ->setup() save the unmapping 52 * of the mmio register file, that's done in the generic code. */ 53 void (*cleanup)(void); 54 void (*write_entry)(dma_addr_t addr, unsigned int entry, unsigned int flags); 55 /* Flags is a more or less chipset specific opaque value. 56 * For chipsets that need to support old ums (non-gem) code, this 57 * needs to be identical to the various supported agp memory types! */ 58 bool (*check_flags)(unsigned int flags); 59 void (*chipset_flush)(void); 60 }; 61 62 static struct _intel_private { 63 const struct intel_gtt_driver *driver; 64 struct pci_dev *pcidev; /* device one */ 65 struct pci_dev *bridge_dev; 66 u8 __iomem *registers; 67 phys_addr_t gtt_bus_addr; 68 u32 PGETBL_save; 69 u32 __iomem *gtt; /* I915G */ 70 bool clear_fake_agp; /* on first access via agp, fill with scratch */ 71 int num_dcache_entries; 72 void __iomem *i9xx_flush_page; 73 char *i81x_gtt_table; 74 struct resource ifp_resource; 75 int resource_valid; 76 struct page *scratch_page; 77 phys_addr_t scratch_page_dma; 78 int refcount; 79 /* Whether i915 needs to use the dmar apis or not. */ 80 unsigned int needs_dmar : 1; 81 phys_addr_t gma_bus_addr; 82 /* Size of memory reserved for graphics by the BIOS */ 83 unsigned int stolen_size; 84 /* Total number of gtt entries. */ 85 unsigned int gtt_total_entries; 86 /* Part of the gtt that is mappable by the cpu, for those chips where 87 * this is not the full gtt. */ 88 unsigned int gtt_mappable_entries; 89 } intel_private; 90 91 #define INTEL_GTT_GEN intel_private.driver->gen 92 #define IS_G33 intel_private.driver->is_g33 93 #define IS_PINEVIEW intel_private.driver->is_pineview 94 #define IS_IRONLAKE intel_private.driver->is_ironlake 95 #define HAS_PGTBL_EN intel_private.driver->has_pgtbl_enable 96 97 static int intel_gtt_map_memory(struct page **pages, 98 unsigned int num_entries, 99 struct sg_table *st) 100 { 101 struct scatterlist *sg; 102 int i; 103 104 DBG("try mapping %lu pages\n", (unsigned long)num_entries); 105 106 if (sg_alloc_table(st, num_entries, GFP_KERNEL)) 107 goto err; 108 109 for_each_sg(st->sgl, sg, num_entries, i) 110 sg_set_page(sg, pages[i], PAGE_SIZE, 0); 111 112 if (!pci_map_sg(intel_private.pcidev, 113 st->sgl, st->nents, PCI_DMA_BIDIRECTIONAL)) 114 goto err; 115 116 return 0; 117 118 err: 119 sg_free_table(st); 120 return -ENOMEM; 121 } 122 123 static void intel_gtt_unmap_memory(struct scatterlist *sg_list, int num_sg) 124 { 125 struct sg_table st; 126 DBG("try unmapping %lu pages\n", (unsigned long)mem->page_count); 127 128 pci_unmap_sg(intel_private.pcidev, sg_list, 129 num_sg, PCI_DMA_BIDIRECTIONAL); 130 131 st.sgl = sg_list; 132 st.orig_nents = st.nents = num_sg; 133 134 sg_free_table(&st); 135 } 136 137 static void intel_fake_agp_enable(struct agp_bridge_data *bridge, u32 mode) 138 { 139 return; 140 } 141 142 /* Exists to support ARGB cursors */ 143 static struct page *i8xx_alloc_pages(void) 144 { 145 struct page *page; 146 147 page = alloc_pages(GFP_KERNEL | GFP_DMA32, 2); 148 if (page == NULL) 149 return NULL; 150 151 if (set_pages_uc(page, 4) < 0) { 152 set_pages_wb(page, 4); 153 __free_pages(page, 2); 154 return NULL; 155 } 156 get_page(page); 157 atomic_inc(&agp_bridge->current_memory_agp); 158 return page; 159 } 160 161 static void i8xx_destroy_pages(struct page *page) 162 { 163 if (page == NULL) 164 return; 165 166 set_pages_wb(page, 4); 167 put_page(page); 168 __free_pages(page, 2); 169 atomic_dec(&agp_bridge->current_memory_agp); 170 } 171 172 #define I810_GTT_ORDER 4 173 static int i810_setup(void) 174 { 175 u32 reg_addr; 176 char *gtt_table; 177 178 /* i81x does not preallocate the gtt. It's always 64kb in size. */ 179 gtt_table = alloc_gatt_pages(I810_GTT_ORDER); 180 if (gtt_table == NULL) 181 return -ENOMEM; 182 intel_private.i81x_gtt_table = gtt_table; 183 184 pci_read_config_dword(intel_private.pcidev, I810_MMADDR, ®_addr); 185 reg_addr &= 0xfff80000; 186 187 intel_private.registers = ioremap(reg_addr, KB(64)); 188 if (!intel_private.registers) 189 return -ENOMEM; 190 191 writel(virt_to_phys(gtt_table) | I810_PGETBL_ENABLED, 192 intel_private.registers+I810_PGETBL_CTL); 193 194 intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE; 195 196 if ((readl(intel_private.registers+I810_DRAM_CTL) 197 & I810_DRAM_ROW_0) == I810_DRAM_ROW_0_SDRAM) { 198 dev_info(&intel_private.pcidev->dev, 199 "detected 4MB dedicated video ram\n"); 200 intel_private.num_dcache_entries = 1024; 201 } 202 203 return 0; 204 } 205 206 static void i810_cleanup(void) 207 { 208 writel(0, intel_private.registers+I810_PGETBL_CTL); 209 free_gatt_pages(intel_private.i81x_gtt_table, I810_GTT_ORDER); 210 } 211 212 static int i810_insert_dcache_entries(struct agp_memory *mem, off_t pg_start, 213 int type) 214 { 215 int i; 216 217 if ((pg_start + mem->page_count) 218 > intel_private.num_dcache_entries) 219 return -EINVAL; 220 221 if (!mem->is_flushed) 222 global_cache_flush(); 223 224 for (i = pg_start; i < (pg_start + mem->page_count); i++) { 225 dma_addr_t addr = i << PAGE_SHIFT; 226 intel_private.driver->write_entry(addr, 227 i, type); 228 } 229 readl(intel_private.gtt+i-1); 230 231 return 0; 232 } 233 234 /* 235 * The i810/i830 requires a physical address to program its mouse 236 * pointer into hardware. 237 * However the Xserver still writes to it through the agp aperture. 238 */ 239 static struct agp_memory *alloc_agpphysmem_i8xx(size_t pg_count, int type) 240 { 241 struct agp_memory *new; 242 struct page *page; 243 244 switch (pg_count) { 245 case 1: page = agp_bridge->driver->agp_alloc_page(agp_bridge); 246 break; 247 case 4: 248 /* kludge to get 4 physical pages for ARGB cursor */ 249 page = i8xx_alloc_pages(); 250 break; 251 default: 252 return NULL; 253 } 254 255 if (page == NULL) 256 return NULL; 257 258 new = agp_create_memory(pg_count); 259 if (new == NULL) 260 return NULL; 261 262 new->pages[0] = page; 263 if (pg_count == 4) { 264 /* kludge to get 4 physical pages for ARGB cursor */ 265 new->pages[1] = new->pages[0] + 1; 266 new->pages[2] = new->pages[1] + 1; 267 new->pages[3] = new->pages[2] + 1; 268 } 269 new->page_count = pg_count; 270 new->num_scratch_pages = pg_count; 271 new->type = AGP_PHYS_MEMORY; 272 new->physical = page_to_phys(new->pages[0]); 273 return new; 274 } 275 276 static void intel_i810_free_by_type(struct agp_memory *curr) 277 { 278 agp_free_key(curr->key); 279 if (curr->type == AGP_PHYS_MEMORY) { 280 if (curr->page_count == 4) 281 i8xx_destroy_pages(curr->pages[0]); 282 else { 283 agp_bridge->driver->agp_destroy_page(curr->pages[0], 284 AGP_PAGE_DESTROY_UNMAP); 285 agp_bridge->driver->agp_destroy_page(curr->pages[0], 286 AGP_PAGE_DESTROY_FREE); 287 } 288 agp_free_page_array(curr); 289 } 290 kfree(curr); 291 } 292 293 static int intel_gtt_setup_scratch_page(void) 294 { 295 struct page *page; 296 dma_addr_t dma_addr; 297 298 page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); 299 if (page == NULL) 300 return -ENOMEM; 301 get_page(page); 302 set_pages_uc(page, 1); 303 304 if (intel_private.needs_dmar) { 305 dma_addr = pci_map_page(intel_private.pcidev, page, 0, 306 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); 307 if (pci_dma_mapping_error(intel_private.pcidev, dma_addr)) 308 return -EINVAL; 309 310 intel_private.scratch_page_dma = dma_addr; 311 } else 312 intel_private.scratch_page_dma = page_to_phys(page); 313 314 intel_private.scratch_page = page; 315 316 return 0; 317 } 318 319 static void i810_write_entry(dma_addr_t addr, unsigned int entry, 320 unsigned int flags) 321 { 322 u32 pte_flags = I810_PTE_VALID; 323 324 switch (flags) { 325 case AGP_DCACHE_MEMORY: 326 pte_flags |= I810_PTE_LOCAL; 327 break; 328 case AGP_USER_CACHED_MEMORY: 329 pte_flags |= I830_PTE_SYSTEM_CACHED; 330 break; 331 } 332 333 writel(addr | pte_flags, intel_private.gtt + entry); 334 } 335 336 static const struct aper_size_info_fixed intel_fake_agp_sizes[] = { 337 {32, 8192, 3}, 338 {64, 16384, 4}, 339 {128, 32768, 5}, 340 {256, 65536, 6}, 341 {512, 131072, 7}, 342 }; 343 344 static unsigned int intel_gtt_stolen_size(void) 345 { 346 u16 gmch_ctrl; 347 u8 rdct; 348 int local = 0; 349 static const int ddt[4] = { 0, 16, 32, 64 }; 350 unsigned int stolen_size = 0; 351 352 if (INTEL_GTT_GEN == 1) 353 return 0; /* no stolen mem on i81x */ 354 355 pci_read_config_word(intel_private.bridge_dev, 356 I830_GMCH_CTRL, &gmch_ctrl); 357 358 if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB || 359 intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) { 360 switch (gmch_ctrl & I830_GMCH_GMS_MASK) { 361 case I830_GMCH_GMS_STOLEN_512: 362 stolen_size = KB(512); 363 break; 364 case I830_GMCH_GMS_STOLEN_1024: 365 stolen_size = MB(1); 366 break; 367 case I830_GMCH_GMS_STOLEN_8192: 368 stolen_size = MB(8); 369 break; 370 case I830_GMCH_GMS_LOCAL: 371 rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE); 372 stolen_size = (I830_RDRAM_ND(rdct) + 1) * 373 MB(ddt[I830_RDRAM_DDT(rdct)]); 374 local = 1; 375 break; 376 default: 377 stolen_size = 0; 378 break; 379 } 380 } else { 381 switch (gmch_ctrl & I855_GMCH_GMS_MASK) { 382 case I855_GMCH_GMS_STOLEN_1M: 383 stolen_size = MB(1); 384 break; 385 case I855_GMCH_GMS_STOLEN_4M: 386 stolen_size = MB(4); 387 break; 388 case I855_GMCH_GMS_STOLEN_8M: 389 stolen_size = MB(8); 390 break; 391 case I855_GMCH_GMS_STOLEN_16M: 392 stolen_size = MB(16); 393 break; 394 case I855_GMCH_GMS_STOLEN_32M: 395 stolen_size = MB(32); 396 break; 397 case I915_GMCH_GMS_STOLEN_48M: 398 stolen_size = MB(48); 399 break; 400 case I915_GMCH_GMS_STOLEN_64M: 401 stolen_size = MB(64); 402 break; 403 case G33_GMCH_GMS_STOLEN_128M: 404 stolen_size = MB(128); 405 break; 406 case G33_GMCH_GMS_STOLEN_256M: 407 stolen_size = MB(256); 408 break; 409 case INTEL_GMCH_GMS_STOLEN_96M: 410 stolen_size = MB(96); 411 break; 412 case INTEL_GMCH_GMS_STOLEN_160M: 413 stolen_size = MB(160); 414 break; 415 case INTEL_GMCH_GMS_STOLEN_224M: 416 stolen_size = MB(224); 417 break; 418 case INTEL_GMCH_GMS_STOLEN_352M: 419 stolen_size = MB(352); 420 break; 421 default: 422 stolen_size = 0; 423 break; 424 } 425 } 426 427 if (stolen_size > 0) { 428 dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n", 429 stolen_size / KB(1), local ? "local" : "stolen"); 430 } else { 431 dev_info(&intel_private.bridge_dev->dev, 432 "no pre-allocated video memory detected\n"); 433 stolen_size = 0; 434 } 435 436 return stolen_size; 437 } 438 439 static void i965_adjust_pgetbl_size(unsigned int size_flag) 440 { 441 u32 pgetbl_ctl, pgetbl_ctl2; 442 443 /* ensure that ppgtt is disabled */ 444 pgetbl_ctl2 = readl(intel_private.registers+I965_PGETBL_CTL2); 445 pgetbl_ctl2 &= ~I810_PGETBL_ENABLED; 446 writel(pgetbl_ctl2, intel_private.registers+I965_PGETBL_CTL2); 447 448 /* write the new ggtt size */ 449 pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL); 450 pgetbl_ctl &= ~I965_PGETBL_SIZE_MASK; 451 pgetbl_ctl |= size_flag; 452 writel(pgetbl_ctl, intel_private.registers+I810_PGETBL_CTL); 453 } 454 455 static unsigned int i965_gtt_total_entries(void) 456 { 457 int size; 458 u32 pgetbl_ctl; 459 u16 gmch_ctl; 460 461 pci_read_config_word(intel_private.bridge_dev, 462 I830_GMCH_CTRL, &gmch_ctl); 463 464 if (INTEL_GTT_GEN == 5) { 465 switch (gmch_ctl & G4x_GMCH_SIZE_MASK) { 466 case G4x_GMCH_SIZE_1M: 467 case G4x_GMCH_SIZE_VT_1M: 468 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1MB); 469 break; 470 case G4x_GMCH_SIZE_VT_1_5M: 471 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1_5MB); 472 break; 473 case G4x_GMCH_SIZE_2M: 474 case G4x_GMCH_SIZE_VT_2M: 475 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_2MB); 476 break; 477 } 478 } 479 480 pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL); 481 482 switch (pgetbl_ctl & I965_PGETBL_SIZE_MASK) { 483 case I965_PGETBL_SIZE_128KB: 484 size = KB(128); 485 break; 486 case I965_PGETBL_SIZE_256KB: 487 size = KB(256); 488 break; 489 case I965_PGETBL_SIZE_512KB: 490 size = KB(512); 491 break; 492 /* GTT pagetable sizes bigger than 512KB are not possible on G33! */ 493 case I965_PGETBL_SIZE_1MB: 494 size = KB(1024); 495 break; 496 case I965_PGETBL_SIZE_2MB: 497 size = KB(2048); 498 break; 499 case I965_PGETBL_SIZE_1_5MB: 500 size = KB(1024 + 512); 501 break; 502 default: 503 dev_info(&intel_private.pcidev->dev, 504 "unknown page table size, assuming 512KB\n"); 505 size = KB(512); 506 } 507 508 return size/4; 509 } 510 511 static unsigned int intel_gtt_total_entries(void) 512 { 513 if (IS_G33 || INTEL_GTT_GEN == 4 || INTEL_GTT_GEN == 5) 514 return i965_gtt_total_entries(); 515 else { 516 /* On previous hardware, the GTT size was just what was 517 * required to map the aperture. 518 */ 519 return intel_private.gtt_mappable_entries; 520 } 521 } 522 523 static unsigned int intel_gtt_mappable_entries(void) 524 { 525 unsigned int aperture_size; 526 527 if (INTEL_GTT_GEN == 1) { 528 u32 smram_miscc; 529 530 pci_read_config_dword(intel_private.bridge_dev, 531 I810_SMRAM_MISCC, &smram_miscc); 532 533 if ((smram_miscc & I810_GFX_MEM_WIN_SIZE) 534 == I810_GFX_MEM_WIN_32M) 535 aperture_size = MB(32); 536 else 537 aperture_size = MB(64); 538 } else if (INTEL_GTT_GEN == 2) { 539 u16 gmch_ctrl; 540 541 pci_read_config_word(intel_private.bridge_dev, 542 I830_GMCH_CTRL, &gmch_ctrl); 543 544 if ((gmch_ctrl & I830_GMCH_MEM_MASK) == I830_GMCH_MEM_64M) 545 aperture_size = MB(64); 546 else 547 aperture_size = MB(128); 548 } else { 549 /* 9xx supports large sizes, just look at the length */ 550 aperture_size = pci_resource_len(intel_private.pcidev, 2); 551 } 552 553 return aperture_size >> PAGE_SHIFT; 554 } 555 556 static void intel_gtt_teardown_scratch_page(void) 557 { 558 set_pages_wb(intel_private.scratch_page, 1); 559 pci_unmap_page(intel_private.pcidev, intel_private.scratch_page_dma, 560 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); 561 put_page(intel_private.scratch_page); 562 __free_page(intel_private.scratch_page); 563 } 564 565 static void intel_gtt_cleanup(void) 566 { 567 intel_private.driver->cleanup(); 568 569 iounmap(intel_private.gtt); 570 iounmap(intel_private.registers); 571 572 intel_gtt_teardown_scratch_page(); 573 } 574 575 /* Certain Gen5 chipsets require require idling the GPU before 576 * unmapping anything from the GTT when VT-d is enabled. 577 */ 578 static inline int needs_ilk_vtd_wa(void) 579 { 580 #ifdef CONFIG_INTEL_IOMMU 581 const unsigned short gpu_devid = intel_private.pcidev->device; 582 583 /* Query intel_iommu to see if we need the workaround. Presumably that 584 * was loaded first. 585 */ 586 if ((gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_HB || 587 gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG) && 588 intel_iommu_gfx_mapped) 589 return 1; 590 #endif 591 return 0; 592 } 593 594 static bool intel_gtt_can_wc(void) 595 { 596 if (INTEL_GTT_GEN <= 2) 597 return false; 598 599 if (INTEL_GTT_GEN >= 6) 600 return false; 601 602 /* Reports of major corruption with ILK vt'd enabled */ 603 if (needs_ilk_vtd_wa()) 604 return false; 605 606 return true; 607 } 608 609 static int intel_gtt_init(void) 610 { 611 u32 gma_addr; 612 u32 gtt_map_size; 613 int ret; 614 615 ret = intel_private.driver->setup(); 616 if (ret != 0) 617 return ret; 618 619 intel_private.gtt_mappable_entries = intel_gtt_mappable_entries(); 620 intel_private.gtt_total_entries = intel_gtt_total_entries(); 621 622 /* save the PGETBL reg for resume */ 623 intel_private.PGETBL_save = 624 readl(intel_private.registers+I810_PGETBL_CTL) 625 & ~I810_PGETBL_ENABLED; 626 /* we only ever restore the register when enabling the PGTBL... */ 627 if (HAS_PGTBL_EN) 628 intel_private.PGETBL_save |= I810_PGETBL_ENABLED; 629 630 dev_info(&intel_private.bridge_dev->dev, 631 "detected gtt size: %dK total, %dK mappable\n", 632 intel_private.gtt_total_entries * 4, 633 intel_private.gtt_mappable_entries * 4); 634 635 gtt_map_size = intel_private.gtt_total_entries * 4; 636 637 intel_private.gtt = NULL; 638 if (intel_gtt_can_wc()) 639 intel_private.gtt = ioremap_wc(intel_private.gtt_bus_addr, 640 gtt_map_size); 641 if (intel_private.gtt == NULL) 642 intel_private.gtt = ioremap(intel_private.gtt_bus_addr, 643 gtt_map_size); 644 if (intel_private.gtt == NULL) { 645 intel_private.driver->cleanup(); 646 iounmap(intel_private.registers); 647 return -ENOMEM; 648 } 649 650 global_cache_flush(); /* FIXME: ? */ 651 652 intel_private.stolen_size = intel_gtt_stolen_size(); 653 654 intel_private.needs_dmar = USE_PCI_DMA_API && INTEL_GTT_GEN > 2; 655 656 ret = intel_gtt_setup_scratch_page(); 657 if (ret != 0) { 658 intel_gtt_cleanup(); 659 return ret; 660 } 661 662 if (INTEL_GTT_GEN <= 2) 663 pci_read_config_dword(intel_private.pcidev, I810_GMADDR, 664 &gma_addr); 665 else 666 pci_read_config_dword(intel_private.pcidev, I915_GMADDR, 667 &gma_addr); 668 669 intel_private.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK); 670 671 return 0; 672 } 673 674 static int intel_fake_agp_fetch_size(void) 675 { 676 int num_sizes = ARRAY_SIZE(intel_fake_agp_sizes); 677 unsigned int aper_size; 678 int i; 679 680 aper_size = (intel_private.gtt_mappable_entries << PAGE_SHIFT) / MB(1); 681 682 for (i = 0; i < num_sizes; i++) { 683 if (aper_size == intel_fake_agp_sizes[i].size) { 684 agp_bridge->current_size = 685 (void *) (intel_fake_agp_sizes + i); 686 return aper_size; 687 } 688 } 689 690 return 0; 691 } 692 693 static void i830_cleanup(void) 694 { 695 } 696 697 /* The chipset_flush interface needs to get data that has already been 698 * flushed out of the CPU all the way out to main memory, because the GPU 699 * doesn't snoop those buffers. 700 * 701 * The 8xx series doesn't have the same lovely interface for flushing the 702 * chipset write buffers that the later chips do. According to the 865 703 * specs, it's 64 octwords, or 1KB. So, to get those previous things in 704 * that buffer out, we just fill 1KB and clflush it out, on the assumption 705 * that it'll push whatever was in there out. It appears to work. 706 */ 707 static void i830_chipset_flush(void) 708 { 709 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 710 711 /* Forcibly evict everything from the CPU write buffers. 712 * clflush appears to be insufficient. 713 */ 714 wbinvd_on_all_cpus(); 715 716 /* Now we've only seen documents for this magic bit on 855GM, 717 * we hope it exists for the other gen2 chipsets... 718 * 719 * Also works as advertised on my 845G. 720 */ 721 writel(readl(intel_private.registers+I830_HIC) | (1<<31), 722 intel_private.registers+I830_HIC); 723 724 while (readl(intel_private.registers+I830_HIC) & (1<<31)) { 725 if (time_after(jiffies, timeout)) 726 break; 727 728 udelay(50); 729 } 730 } 731 732 static void i830_write_entry(dma_addr_t addr, unsigned int entry, 733 unsigned int flags) 734 { 735 u32 pte_flags = I810_PTE_VALID; 736 737 if (flags == AGP_USER_CACHED_MEMORY) 738 pte_flags |= I830_PTE_SYSTEM_CACHED; 739 740 writel(addr | pte_flags, intel_private.gtt + entry); 741 } 742 743 bool intel_enable_gtt(void) 744 { 745 u8 __iomem *reg; 746 747 if (INTEL_GTT_GEN == 2) { 748 u16 gmch_ctrl; 749 750 pci_read_config_word(intel_private.bridge_dev, 751 I830_GMCH_CTRL, &gmch_ctrl); 752 gmch_ctrl |= I830_GMCH_ENABLED; 753 pci_write_config_word(intel_private.bridge_dev, 754 I830_GMCH_CTRL, gmch_ctrl); 755 756 pci_read_config_word(intel_private.bridge_dev, 757 I830_GMCH_CTRL, &gmch_ctrl); 758 if ((gmch_ctrl & I830_GMCH_ENABLED) == 0) { 759 dev_err(&intel_private.pcidev->dev, 760 "failed to enable the GTT: GMCH_CTRL=%x\n", 761 gmch_ctrl); 762 return false; 763 } 764 } 765 766 /* On the resume path we may be adjusting the PGTBL value, so 767 * be paranoid and flush all chipset write buffers... 768 */ 769 if (INTEL_GTT_GEN >= 3) 770 writel(0, intel_private.registers+GFX_FLSH_CNTL); 771 772 reg = intel_private.registers+I810_PGETBL_CTL; 773 writel(intel_private.PGETBL_save, reg); 774 if (HAS_PGTBL_EN && (readl(reg) & I810_PGETBL_ENABLED) == 0) { 775 dev_err(&intel_private.pcidev->dev, 776 "failed to enable the GTT: PGETBL=%x [expected %x]\n", 777 readl(reg), intel_private.PGETBL_save); 778 return false; 779 } 780 781 if (INTEL_GTT_GEN >= 3) 782 writel(0, intel_private.registers+GFX_FLSH_CNTL); 783 784 return true; 785 } 786 EXPORT_SYMBOL(intel_enable_gtt); 787 788 static int i830_setup(void) 789 { 790 u32 reg_addr; 791 792 pci_read_config_dword(intel_private.pcidev, I810_MMADDR, ®_addr); 793 reg_addr &= 0xfff80000; 794 795 intel_private.registers = ioremap(reg_addr, KB(64)); 796 if (!intel_private.registers) 797 return -ENOMEM; 798 799 intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE; 800 801 return 0; 802 } 803 804 static int intel_fake_agp_create_gatt_table(struct agp_bridge_data *bridge) 805 { 806 agp_bridge->gatt_table_real = NULL; 807 agp_bridge->gatt_table = NULL; 808 agp_bridge->gatt_bus_addr = 0; 809 810 return 0; 811 } 812 813 static int intel_fake_agp_free_gatt_table(struct agp_bridge_data *bridge) 814 { 815 return 0; 816 } 817 818 static int intel_fake_agp_configure(void) 819 { 820 if (!intel_enable_gtt()) 821 return -EIO; 822 823 intel_private.clear_fake_agp = true; 824 agp_bridge->gart_bus_addr = intel_private.gma_bus_addr; 825 826 return 0; 827 } 828 829 static bool i830_check_flags(unsigned int flags) 830 { 831 switch (flags) { 832 case 0: 833 case AGP_PHYS_MEMORY: 834 case AGP_USER_CACHED_MEMORY: 835 case AGP_USER_MEMORY: 836 return true; 837 } 838 839 return false; 840 } 841 842 void intel_gtt_insert_sg_entries(struct sg_table *st, 843 unsigned int pg_start, 844 unsigned int flags) 845 { 846 struct scatterlist *sg; 847 unsigned int len, m; 848 int i, j; 849 850 j = pg_start; 851 852 /* sg may merge pages, but we have to separate 853 * per-page addr for GTT */ 854 for_each_sg(st->sgl, sg, st->nents, i) { 855 len = sg_dma_len(sg) >> PAGE_SHIFT; 856 for (m = 0; m < len; m++) { 857 dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); 858 intel_private.driver->write_entry(addr, j, flags); 859 j++; 860 } 861 } 862 readl(intel_private.gtt+j-1); 863 } 864 EXPORT_SYMBOL(intel_gtt_insert_sg_entries); 865 866 static void intel_gtt_insert_pages(unsigned int first_entry, 867 unsigned int num_entries, 868 struct page **pages, 869 unsigned int flags) 870 { 871 int i, j; 872 873 for (i = 0, j = first_entry; i < num_entries; i++, j++) { 874 dma_addr_t addr = page_to_phys(pages[i]); 875 intel_private.driver->write_entry(addr, 876 j, flags); 877 } 878 readl(intel_private.gtt+j-1); 879 } 880 881 static int intel_fake_agp_insert_entries(struct agp_memory *mem, 882 off_t pg_start, int type) 883 { 884 int ret = -EINVAL; 885 886 if (intel_private.clear_fake_agp) { 887 int start = intel_private.stolen_size / PAGE_SIZE; 888 int end = intel_private.gtt_mappable_entries; 889 intel_gtt_clear_range(start, end - start); 890 intel_private.clear_fake_agp = false; 891 } 892 893 if (INTEL_GTT_GEN == 1 && type == AGP_DCACHE_MEMORY) 894 return i810_insert_dcache_entries(mem, pg_start, type); 895 896 if (mem->page_count == 0) 897 goto out; 898 899 if (pg_start + mem->page_count > intel_private.gtt_total_entries) 900 goto out_err; 901 902 if (type != mem->type) 903 goto out_err; 904 905 if (!intel_private.driver->check_flags(type)) 906 goto out_err; 907 908 if (!mem->is_flushed) 909 global_cache_flush(); 910 911 if (intel_private.needs_dmar) { 912 struct sg_table st; 913 914 ret = intel_gtt_map_memory(mem->pages, mem->page_count, &st); 915 if (ret != 0) 916 return ret; 917 918 intel_gtt_insert_sg_entries(&st, pg_start, type); 919 mem->sg_list = st.sgl; 920 mem->num_sg = st.nents; 921 } else 922 intel_gtt_insert_pages(pg_start, mem->page_count, mem->pages, 923 type); 924 925 out: 926 ret = 0; 927 out_err: 928 mem->is_flushed = true; 929 return ret; 930 } 931 932 void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries) 933 { 934 unsigned int i; 935 936 for (i = first_entry; i < (first_entry + num_entries); i++) { 937 intel_private.driver->write_entry(intel_private.scratch_page_dma, 938 i, 0); 939 } 940 readl(intel_private.gtt+i-1); 941 } 942 EXPORT_SYMBOL(intel_gtt_clear_range); 943 944 static int intel_fake_agp_remove_entries(struct agp_memory *mem, 945 off_t pg_start, int type) 946 { 947 if (mem->page_count == 0) 948 return 0; 949 950 intel_gtt_clear_range(pg_start, mem->page_count); 951 952 if (intel_private.needs_dmar) { 953 intel_gtt_unmap_memory(mem->sg_list, mem->num_sg); 954 mem->sg_list = NULL; 955 mem->num_sg = 0; 956 } 957 958 return 0; 959 } 960 961 static struct agp_memory *intel_fake_agp_alloc_by_type(size_t pg_count, 962 int type) 963 { 964 struct agp_memory *new; 965 966 if (type == AGP_DCACHE_MEMORY && INTEL_GTT_GEN == 1) { 967 if (pg_count != intel_private.num_dcache_entries) 968 return NULL; 969 970 new = agp_create_memory(1); 971 if (new == NULL) 972 return NULL; 973 974 new->type = AGP_DCACHE_MEMORY; 975 new->page_count = pg_count; 976 new->num_scratch_pages = 0; 977 agp_free_page_array(new); 978 return new; 979 } 980 if (type == AGP_PHYS_MEMORY) 981 return alloc_agpphysmem_i8xx(pg_count, type); 982 /* always return NULL for other allocation types for now */ 983 return NULL; 984 } 985 986 static int intel_alloc_chipset_flush_resource(void) 987 { 988 int ret; 989 ret = pci_bus_alloc_resource(intel_private.bridge_dev->bus, &intel_private.ifp_resource, PAGE_SIZE, 990 PAGE_SIZE, PCIBIOS_MIN_MEM, 0, 991 pcibios_align_resource, intel_private.bridge_dev); 992 993 return ret; 994 } 995 996 static void intel_i915_setup_chipset_flush(void) 997 { 998 int ret; 999 u32 temp; 1000 1001 pci_read_config_dword(intel_private.bridge_dev, I915_IFPADDR, &temp); 1002 if (!(temp & 0x1)) { 1003 intel_alloc_chipset_flush_resource(); 1004 intel_private.resource_valid = 1; 1005 pci_write_config_dword(intel_private.bridge_dev, I915_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1); 1006 } else { 1007 temp &= ~1; 1008 1009 intel_private.resource_valid = 1; 1010 intel_private.ifp_resource.start = temp; 1011 intel_private.ifp_resource.end = temp + PAGE_SIZE; 1012 ret = request_resource(&iomem_resource, &intel_private.ifp_resource); 1013 /* some BIOSes reserve this area in a pnp some don't */ 1014 if (ret) 1015 intel_private.resource_valid = 0; 1016 } 1017 } 1018 1019 static void intel_i965_g33_setup_chipset_flush(void) 1020 { 1021 u32 temp_hi, temp_lo; 1022 int ret; 1023 1024 pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4, &temp_hi); 1025 pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR, &temp_lo); 1026 1027 if (!(temp_lo & 0x1)) { 1028 1029 intel_alloc_chipset_flush_resource(); 1030 1031 intel_private.resource_valid = 1; 1032 pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4, 1033 upper_32_bits(intel_private.ifp_resource.start)); 1034 pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1); 1035 } else { 1036 u64 l64; 1037 1038 temp_lo &= ~0x1; 1039 l64 = ((u64)temp_hi << 32) | temp_lo; 1040 1041 intel_private.resource_valid = 1; 1042 intel_private.ifp_resource.start = l64; 1043 intel_private.ifp_resource.end = l64 + PAGE_SIZE; 1044 ret = request_resource(&iomem_resource, &intel_private.ifp_resource); 1045 /* some BIOSes reserve this area in a pnp some don't */ 1046 if (ret) 1047 intel_private.resource_valid = 0; 1048 } 1049 } 1050 1051 static void intel_i9xx_setup_flush(void) 1052 { 1053 /* return if already configured */ 1054 if (intel_private.ifp_resource.start) 1055 return; 1056 1057 if (INTEL_GTT_GEN == 6) 1058 return; 1059 1060 /* setup a resource for this object */ 1061 intel_private.ifp_resource.name = "Intel Flush Page"; 1062 intel_private.ifp_resource.flags = IORESOURCE_MEM; 1063 1064 /* Setup chipset flush for 915 */ 1065 if (IS_G33 || INTEL_GTT_GEN >= 4) { 1066 intel_i965_g33_setup_chipset_flush(); 1067 } else { 1068 intel_i915_setup_chipset_flush(); 1069 } 1070 1071 if (intel_private.ifp_resource.start) 1072 intel_private.i9xx_flush_page = ioremap_nocache(intel_private.ifp_resource.start, PAGE_SIZE); 1073 if (!intel_private.i9xx_flush_page) 1074 dev_err(&intel_private.pcidev->dev, 1075 "can't ioremap flush page - no chipset flushing\n"); 1076 } 1077 1078 static void i9xx_cleanup(void) 1079 { 1080 if (intel_private.i9xx_flush_page) 1081 iounmap(intel_private.i9xx_flush_page); 1082 if (intel_private.resource_valid) 1083 release_resource(&intel_private.ifp_resource); 1084 intel_private.ifp_resource.start = 0; 1085 intel_private.resource_valid = 0; 1086 } 1087 1088 static void i9xx_chipset_flush(void) 1089 { 1090 if (intel_private.i9xx_flush_page) 1091 writel(1, intel_private.i9xx_flush_page); 1092 } 1093 1094 static void i965_write_entry(dma_addr_t addr, 1095 unsigned int entry, 1096 unsigned int flags) 1097 { 1098 u32 pte_flags; 1099 1100 pte_flags = I810_PTE_VALID; 1101 if (flags == AGP_USER_CACHED_MEMORY) 1102 pte_flags |= I830_PTE_SYSTEM_CACHED; 1103 1104 /* Shift high bits down */ 1105 addr |= (addr >> 28) & 0xf0; 1106 writel(addr | pte_flags, intel_private.gtt + entry); 1107 } 1108 1109 static int i9xx_setup(void) 1110 { 1111 u32 reg_addr, gtt_addr; 1112 int size = KB(512); 1113 1114 pci_read_config_dword(intel_private.pcidev, I915_MMADDR, ®_addr); 1115 1116 reg_addr &= 0xfff80000; 1117 1118 intel_private.registers = ioremap(reg_addr, size); 1119 if (!intel_private.registers) 1120 return -ENOMEM; 1121 1122 switch (INTEL_GTT_GEN) { 1123 case 3: 1124 pci_read_config_dword(intel_private.pcidev, 1125 I915_PTEADDR, >t_addr); 1126 intel_private.gtt_bus_addr = gtt_addr; 1127 break; 1128 case 5: 1129 intel_private.gtt_bus_addr = reg_addr + MB(2); 1130 break; 1131 default: 1132 intel_private.gtt_bus_addr = reg_addr + KB(512); 1133 break; 1134 } 1135 1136 intel_i9xx_setup_flush(); 1137 1138 return 0; 1139 } 1140 1141 static const struct agp_bridge_driver intel_fake_agp_driver = { 1142 .owner = THIS_MODULE, 1143 .size_type = FIXED_APER_SIZE, 1144 .aperture_sizes = intel_fake_agp_sizes, 1145 .num_aperture_sizes = ARRAY_SIZE(intel_fake_agp_sizes), 1146 .configure = intel_fake_agp_configure, 1147 .fetch_size = intel_fake_agp_fetch_size, 1148 .cleanup = intel_gtt_cleanup, 1149 .agp_enable = intel_fake_agp_enable, 1150 .cache_flush = global_cache_flush, 1151 .create_gatt_table = intel_fake_agp_create_gatt_table, 1152 .free_gatt_table = intel_fake_agp_free_gatt_table, 1153 .insert_memory = intel_fake_agp_insert_entries, 1154 .remove_memory = intel_fake_agp_remove_entries, 1155 .alloc_by_type = intel_fake_agp_alloc_by_type, 1156 .free_by_type = intel_i810_free_by_type, 1157 .agp_alloc_page = agp_generic_alloc_page, 1158 .agp_alloc_pages = agp_generic_alloc_pages, 1159 .agp_destroy_page = agp_generic_destroy_page, 1160 .agp_destroy_pages = agp_generic_destroy_pages, 1161 }; 1162 1163 static const struct intel_gtt_driver i81x_gtt_driver = { 1164 .gen = 1, 1165 .has_pgtbl_enable = 1, 1166 .dma_mask_size = 32, 1167 .setup = i810_setup, 1168 .cleanup = i810_cleanup, 1169 .check_flags = i830_check_flags, 1170 .write_entry = i810_write_entry, 1171 }; 1172 static const struct intel_gtt_driver i8xx_gtt_driver = { 1173 .gen = 2, 1174 .has_pgtbl_enable = 1, 1175 .setup = i830_setup, 1176 .cleanup = i830_cleanup, 1177 .write_entry = i830_write_entry, 1178 .dma_mask_size = 32, 1179 .check_flags = i830_check_flags, 1180 .chipset_flush = i830_chipset_flush, 1181 }; 1182 static const struct intel_gtt_driver i915_gtt_driver = { 1183 .gen = 3, 1184 .has_pgtbl_enable = 1, 1185 .setup = i9xx_setup, 1186 .cleanup = i9xx_cleanup, 1187 /* i945 is the last gpu to need phys mem (for overlay and cursors). */ 1188 .write_entry = i830_write_entry, 1189 .dma_mask_size = 32, 1190 .check_flags = i830_check_flags, 1191 .chipset_flush = i9xx_chipset_flush, 1192 }; 1193 static const struct intel_gtt_driver g33_gtt_driver = { 1194 .gen = 3, 1195 .is_g33 = 1, 1196 .setup = i9xx_setup, 1197 .cleanup = i9xx_cleanup, 1198 .write_entry = i965_write_entry, 1199 .dma_mask_size = 36, 1200 .check_flags = i830_check_flags, 1201 .chipset_flush = i9xx_chipset_flush, 1202 }; 1203 static const struct intel_gtt_driver pineview_gtt_driver = { 1204 .gen = 3, 1205 .is_pineview = 1, .is_g33 = 1, 1206 .setup = i9xx_setup, 1207 .cleanup = i9xx_cleanup, 1208 .write_entry = i965_write_entry, 1209 .dma_mask_size = 36, 1210 .check_flags = i830_check_flags, 1211 .chipset_flush = i9xx_chipset_flush, 1212 }; 1213 static const struct intel_gtt_driver i965_gtt_driver = { 1214 .gen = 4, 1215 .has_pgtbl_enable = 1, 1216 .setup = i9xx_setup, 1217 .cleanup = i9xx_cleanup, 1218 .write_entry = i965_write_entry, 1219 .dma_mask_size = 36, 1220 .check_flags = i830_check_flags, 1221 .chipset_flush = i9xx_chipset_flush, 1222 }; 1223 static const struct intel_gtt_driver g4x_gtt_driver = { 1224 .gen = 5, 1225 .setup = i9xx_setup, 1226 .cleanup = i9xx_cleanup, 1227 .write_entry = i965_write_entry, 1228 .dma_mask_size = 36, 1229 .check_flags = i830_check_flags, 1230 .chipset_flush = i9xx_chipset_flush, 1231 }; 1232 static const struct intel_gtt_driver ironlake_gtt_driver = { 1233 .gen = 5, 1234 .is_ironlake = 1, 1235 .setup = i9xx_setup, 1236 .cleanup = i9xx_cleanup, 1237 .write_entry = i965_write_entry, 1238 .dma_mask_size = 36, 1239 .check_flags = i830_check_flags, 1240 .chipset_flush = i9xx_chipset_flush, 1241 }; 1242 1243 /* Table to describe Intel GMCH and AGP/PCIE GART drivers. At least one of 1244 * driver and gmch_driver must be non-null, and find_gmch will determine 1245 * which one should be used if a gmch_chip_id is present. 1246 */ 1247 static const struct intel_gtt_driver_description { 1248 unsigned int gmch_chip_id; 1249 char *name; 1250 const struct intel_gtt_driver *gtt_driver; 1251 } intel_gtt_chipsets[] = { 1252 { PCI_DEVICE_ID_INTEL_82810_IG1, "i810", 1253 &i81x_gtt_driver}, 1254 { PCI_DEVICE_ID_INTEL_82810_IG3, "i810", 1255 &i81x_gtt_driver}, 1256 { PCI_DEVICE_ID_INTEL_82810E_IG, "i810", 1257 &i81x_gtt_driver}, 1258 { PCI_DEVICE_ID_INTEL_82815_CGC, "i815", 1259 &i81x_gtt_driver}, 1260 { PCI_DEVICE_ID_INTEL_82830_CGC, "830M", 1261 &i8xx_gtt_driver}, 1262 { PCI_DEVICE_ID_INTEL_82845G_IG, "845G", 1263 &i8xx_gtt_driver}, 1264 { PCI_DEVICE_ID_INTEL_82854_IG, "854", 1265 &i8xx_gtt_driver}, 1266 { PCI_DEVICE_ID_INTEL_82855GM_IG, "855GM", 1267 &i8xx_gtt_driver}, 1268 { PCI_DEVICE_ID_INTEL_82865_IG, "865", 1269 &i8xx_gtt_driver}, 1270 { PCI_DEVICE_ID_INTEL_E7221_IG, "E7221 (i915)", 1271 &i915_gtt_driver }, 1272 { PCI_DEVICE_ID_INTEL_82915G_IG, "915G", 1273 &i915_gtt_driver }, 1274 { PCI_DEVICE_ID_INTEL_82915GM_IG, "915GM", 1275 &i915_gtt_driver }, 1276 { PCI_DEVICE_ID_INTEL_82945G_IG, "945G", 1277 &i915_gtt_driver }, 1278 { PCI_DEVICE_ID_INTEL_82945GM_IG, "945GM", 1279 &i915_gtt_driver }, 1280 { PCI_DEVICE_ID_INTEL_82945GME_IG, "945GME", 1281 &i915_gtt_driver }, 1282 { PCI_DEVICE_ID_INTEL_82946GZ_IG, "946GZ", 1283 &i965_gtt_driver }, 1284 { PCI_DEVICE_ID_INTEL_82G35_IG, "G35", 1285 &i965_gtt_driver }, 1286 { PCI_DEVICE_ID_INTEL_82965Q_IG, "965Q", 1287 &i965_gtt_driver }, 1288 { PCI_DEVICE_ID_INTEL_82965G_IG, "965G", 1289 &i965_gtt_driver }, 1290 { PCI_DEVICE_ID_INTEL_82965GM_IG, "965GM", 1291 &i965_gtt_driver }, 1292 { PCI_DEVICE_ID_INTEL_82965GME_IG, "965GME/GLE", 1293 &i965_gtt_driver }, 1294 { PCI_DEVICE_ID_INTEL_G33_IG, "G33", 1295 &g33_gtt_driver }, 1296 { PCI_DEVICE_ID_INTEL_Q35_IG, "Q35", 1297 &g33_gtt_driver }, 1298 { PCI_DEVICE_ID_INTEL_Q33_IG, "Q33", 1299 &g33_gtt_driver }, 1300 { PCI_DEVICE_ID_INTEL_PINEVIEW_M_IG, "GMA3150", 1301 &pineview_gtt_driver }, 1302 { PCI_DEVICE_ID_INTEL_PINEVIEW_IG, "GMA3150", 1303 &pineview_gtt_driver }, 1304 { PCI_DEVICE_ID_INTEL_GM45_IG, "GM45", 1305 &g4x_gtt_driver }, 1306 { PCI_DEVICE_ID_INTEL_EAGLELAKE_IG, "Eaglelake", 1307 &g4x_gtt_driver }, 1308 { PCI_DEVICE_ID_INTEL_Q45_IG, "Q45/Q43", 1309 &g4x_gtt_driver }, 1310 { PCI_DEVICE_ID_INTEL_G45_IG, "G45/G43", 1311 &g4x_gtt_driver }, 1312 { PCI_DEVICE_ID_INTEL_B43_IG, "B43", 1313 &g4x_gtt_driver }, 1314 { PCI_DEVICE_ID_INTEL_B43_1_IG, "B43", 1315 &g4x_gtt_driver }, 1316 { PCI_DEVICE_ID_INTEL_G41_IG, "G41", 1317 &g4x_gtt_driver }, 1318 { PCI_DEVICE_ID_INTEL_IRONLAKE_D_IG, 1319 "HD Graphics", &ironlake_gtt_driver }, 1320 { PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG, 1321 "HD Graphics", &ironlake_gtt_driver }, 1322 { 0, NULL, NULL } 1323 }; 1324 1325 static int find_gmch(u16 device) 1326 { 1327 struct pci_dev *gmch_device; 1328 1329 gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL); 1330 if (gmch_device && PCI_FUNC(gmch_device->devfn) != 0) { 1331 gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL, 1332 device, gmch_device); 1333 } 1334 1335 if (!gmch_device) 1336 return 0; 1337 1338 intel_private.pcidev = gmch_device; 1339 return 1; 1340 } 1341 1342 int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev, 1343 struct agp_bridge_data *bridge) 1344 { 1345 int i, mask; 1346 1347 /* 1348 * Can be called from the fake agp driver but also directly from 1349 * drm/i915.ko. Hence we need to check whether everything is set up 1350 * already. 1351 */ 1352 if (intel_private.driver) { 1353 intel_private.refcount++; 1354 return 1; 1355 } 1356 1357 for (i = 0; intel_gtt_chipsets[i].name != NULL; i++) { 1358 if (gpu_pdev) { 1359 if (gpu_pdev->device == 1360 intel_gtt_chipsets[i].gmch_chip_id) { 1361 intel_private.pcidev = pci_dev_get(gpu_pdev); 1362 intel_private.driver = 1363 intel_gtt_chipsets[i].gtt_driver; 1364 1365 break; 1366 } 1367 } else if (find_gmch(intel_gtt_chipsets[i].gmch_chip_id)) { 1368 intel_private.driver = 1369 intel_gtt_chipsets[i].gtt_driver; 1370 break; 1371 } 1372 } 1373 1374 if (!intel_private.driver) 1375 return 0; 1376 1377 intel_private.refcount++; 1378 1379 if (bridge) { 1380 bridge->driver = &intel_fake_agp_driver; 1381 bridge->dev_private_data = &intel_private; 1382 bridge->dev = bridge_pdev; 1383 } 1384 1385 intel_private.bridge_dev = pci_dev_get(bridge_pdev); 1386 1387 dev_info(&bridge_pdev->dev, "Intel %s Chipset\n", intel_gtt_chipsets[i].name); 1388 1389 mask = intel_private.driver->dma_mask_size; 1390 if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(mask))) 1391 dev_err(&intel_private.pcidev->dev, 1392 "set gfx device dma mask %d-bit failed!\n", mask); 1393 else 1394 pci_set_consistent_dma_mask(intel_private.pcidev, 1395 DMA_BIT_MASK(mask)); 1396 1397 if (intel_gtt_init() != 0) { 1398 intel_gmch_remove(); 1399 1400 return 0; 1401 } 1402 1403 return 1; 1404 } 1405 EXPORT_SYMBOL(intel_gmch_probe); 1406 1407 void intel_gtt_get(size_t *gtt_total, size_t *stolen_size, 1408 phys_addr_t *mappable_base, unsigned long *mappable_end) 1409 { 1410 *gtt_total = intel_private.gtt_total_entries << PAGE_SHIFT; 1411 *stolen_size = intel_private.stolen_size; 1412 *mappable_base = intel_private.gma_bus_addr; 1413 *mappable_end = intel_private.gtt_mappable_entries << PAGE_SHIFT; 1414 } 1415 EXPORT_SYMBOL(intel_gtt_get); 1416 1417 void intel_gtt_chipset_flush(void) 1418 { 1419 if (intel_private.driver->chipset_flush) 1420 intel_private.driver->chipset_flush(); 1421 } 1422 EXPORT_SYMBOL(intel_gtt_chipset_flush); 1423 1424 void intel_gmch_remove(void) 1425 { 1426 if (--intel_private.refcount) 1427 return; 1428 1429 if (intel_private.pcidev) 1430 pci_dev_put(intel_private.pcidev); 1431 if (intel_private.bridge_dev) 1432 pci_dev_put(intel_private.bridge_dev); 1433 intel_private.driver = NULL; 1434 } 1435 EXPORT_SYMBOL(intel_gmch_remove); 1436 1437 MODULE_AUTHOR("Dave Jones <davej@redhat.com>"); 1438 MODULE_LICENSE("GPL and additional rights"); 1439