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/kernel.h> 21 #include <linux/pagemap.h> 22 #include <linux/agp_backend.h> 23 #include <linux/intel-iommu.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 #include <asm/set_memory.h> 30 31 /* 32 * If we have Intel graphics, we're not going to have anything other than 33 * an Intel IOMMU. So make the correct use of the PCI DMA API contingent 34 * on the Intel IOMMU support (CONFIG_INTEL_IOMMU). 35 * Only newer chipsets need to bother with this, of course. 36 */ 37 #ifdef CONFIG_INTEL_IOMMU 38 #define USE_PCI_DMA_API 1 39 #else 40 #define USE_PCI_DMA_API 0 41 #endif 42 43 struct intel_gtt_driver { 44 unsigned int gen : 8; 45 unsigned int is_g33 : 1; 46 unsigned int is_pineview : 1; 47 unsigned int is_ironlake : 1; 48 unsigned int has_pgtbl_enable : 1; 49 unsigned int dma_mask_size : 8; 50 /* Chipset specific GTT setup */ 51 int (*setup)(void); 52 /* This should undo anything done in ->setup() save the unmapping 53 * of the mmio register file, that's done in the generic code. */ 54 void (*cleanup)(void); 55 void (*write_entry)(dma_addr_t addr, unsigned int entry, unsigned int flags); 56 /* Flags is a more or less chipset specific opaque value. 57 * For chipsets that need to support old ums (non-gem) code, this 58 * needs to be identical to the various supported agp memory types! */ 59 bool (*check_flags)(unsigned int flags); 60 void (*chipset_flush)(void); 61 }; 62 63 static struct _intel_private { 64 const struct intel_gtt_driver *driver; 65 struct pci_dev *pcidev; /* device one */ 66 struct pci_dev *bridge_dev; 67 u8 __iomem *registers; 68 phys_addr_t gtt_phys_addr; 69 u32 PGETBL_save; 70 u32 __iomem *gtt; /* I915G */ 71 bool clear_fake_agp; /* on first access via agp, fill with scratch */ 72 int num_dcache_entries; 73 void __iomem *i9xx_flush_page; 74 char *i81x_gtt_table; 75 struct resource ifp_resource; 76 int resource_valid; 77 struct page *scratch_page; 78 phys_addr_t scratch_page_dma; 79 int refcount; 80 /* Whether i915 needs to use the dmar apis or not. */ 81 unsigned int needs_dmar : 1; 82 phys_addr_t gma_bus_addr; 83 /* Size of memory reserved for graphics by the BIOS */ 84 resource_size_t stolen_size; 85 /* Total number of gtt entries. */ 86 unsigned int gtt_total_entries; 87 /* Part of the gtt that is mappable by the cpu, for those chips where 88 * this is not the full gtt. */ 89 unsigned int gtt_mappable_entries; 90 } intel_private; 91 92 #define INTEL_GTT_GEN intel_private.driver->gen 93 #define IS_G33 intel_private.driver->is_g33 94 #define IS_PINEVIEW intel_private.driver->is_pineview 95 #define IS_IRONLAKE intel_private.driver->is_ironlake 96 #define HAS_PGTBL_EN intel_private.driver->has_pgtbl_enable 97 98 #if IS_ENABLED(CONFIG_AGP_INTEL) 99 static int intel_gtt_map_memory(struct page **pages, 100 unsigned int num_entries, 101 struct sg_table *st) 102 { 103 struct scatterlist *sg; 104 int i; 105 106 DBG("try mapping %lu pages\n", (unsigned long)num_entries); 107 108 if (sg_alloc_table(st, num_entries, GFP_KERNEL)) 109 goto err; 110 111 for_each_sg(st->sgl, sg, num_entries, i) 112 sg_set_page(sg, pages[i], PAGE_SIZE, 0); 113 114 if (!pci_map_sg(intel_private.pcidev, 115 st->sgl, st->nents, PCI_DMA_BIDIRECTIONAL)) 116 goto err; 117 118 return 0; 119 120 err: 121 sg_free_table(st); 122 return -ENOMEM; 123 } 124 125 static void intel_gtt_unmap_memory(struct scatterlist *sg_list, int num_sg) 126 { 127 struct sg_table st; 128 DBG("try unmapping %lu pages\n", (unsigned long)mem->page_count); 129 130 pci_unmap_sg(intel_private.pcidev, sg_list, 131 num_sg, PCI_DMA_BIDIRECTIONAL); 132 133 st.sgl = sg_list; 134 st.orig_nents = st.nents = num_sg; 135 136 sg_free_table(&st); 137 } 138 139 static void intel_fake_agp_enable(struct agp_bridge_data *bridge, u32 mode) 140 { 141 return; 142 } 143 144 /* Exists to support ARGB cursors */ 145 static struct page *i8xx_alloc_pages(void) 146 { 147 struct page *page; 148 149 page = alloc_pages(GFP_KERNEL | GFP_DMA32, 2); 150 if (page == NULL) 151 return NULL; 152 153 if (set_pages_uc(page, 4) < 0) { 154 set_pages_wb(page, 4); 155 __free_pages(page, 2); 156 return NULL; 157 } 158 atomic_inc(&agp_bridge->current_memory_agp); 159 return page; 160 } 161 162 static void i8xx_destroy_pages(struct page *page) 163 { 164 if (page == NULL) 165 return; 166 167 set_pages_wb(page, 4); 168 __free_pages(page, 2); 169 atomic_dec(&agp_bridge->current_memory_agp); 170 } 171 #endif 172 173 #define I810_GTT_ORDER 4 174 static int i810_setup(void) 175 { 176 phys_addr_t reg_addr; 177 char *gtt_table; 178 179 /* i81x does not preallocate the gtt. It's always 64kb in size. */ 180 gtt_table = alloc_gatt_pages(I810_GTT_ORDER); 181 if (gtt_table == NULL) 182 return -ENOMEM; 183 intel_private.i81x_gtt_table = gtt_table; 184 185 reg_addr = pci_resource_start(intel_private.pcidev, I810_MMADR_BAR); 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_phys_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 #if IS_ENABLED(CONFIG_AGP_INTEL) 213 static int i810_insert_dcache_entries(struct agp_memory *mem, off_t pg_start, 214 int type) 215 { 216 int i; 217 218 if ((pg_start + mem->page_count) 219 > intel_private.num_dcache_entries) 220 return -EINVAL; 221 222 if (!mem->is_flushed) 223 global_cache_flush(); 224 225 for (i = pg_start; i < (pg_start + mem->page_count); i++) { 226 dma_addr_t addr = i << PAGE_SHIFT; 227 intel_private.driver->write_entry(addr, 228 i, type); 229 } 230 wmb(); 231 232 return 0; 233 } 234 235 /* 236 * The i810/i830 requires a physical address to program its mouse 237 * pointer into hardware. 238 * However the Xserver still writes to it through the agp aperture. 239 */ 240 static struct agp_memory *alloc_agpphysmem_i8xx(size_t pg_count, int type) 241 { 242 struct agp_memory *new; 243 struct page *page; 244 245 switch (pg_count) { 246 case 1: page = agp_bridge->driver->agp_alloc_page(agp_bridge); 247 break; 248 case 4: 249 /* kludge to get 4 physical pages for ARGB cursor */ 250 page = i8xx_alloc_pages(); 251 break; 252 default: 253 return NULL; 254 } 255 256 if (page == NULL) 257 return NULL; 258 259 new = agp_create_memory(pg_count); 260 if (new == NULL) 261 return NULL; 262 263 new->pages[0] = page; 264 if (pg_count == 4) { 265 /* kludge to get 4 physical pages for ARGB cursor */ 266 new->pages[1] = new->pages[0] + 1; 267 new->pages[2] = new->pages[1] + 1; 268 new->pages[3] = new->pages[2] + 1; 269 } 270 new->page_count = pg_count; 271 new->num_scratch_pages = pg_count; 272 new->type = AGP_PHYS_MEMORY; 273 new->physical = page_to_phys(new->pages[0]); 274 return new; 275 } 276 277 static void intel_i810_free_by_type(struct agp_memory *curr) 278 { 279 agp_free_key(curr->key); 280 if (curr->type == AGP_PHYS_MEMORY) { 281 if (curr->page_count == 4) 282 i8xx_destroy_pages(curr->pages[0]); 283 else { 284 agp_bridge->driver->agp_destroy_page(curr->pages[0], 285 AGP_PAGE_DESTROY_UNMAP); 286 agp_bridge->driver->agp_destroy_page(curr->pages[0], 287 AGP_PAGE_DESTROY_FREE); 288 } 289 agp_free_page_array(curr); 290 } 291 kfree(curr); 292 } 293 #endif 294 295 static int intel_gtt_setup_scratch_page(void) 296 { 297 struct page *page; 298 dma_addr_t dma_addr; 299 300 page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); 301 if (page == NULL) 302 return -ENOMEM; 303 set_pages_uc(page, 1); 304 305 if (intel_private.needs_dmar) { 306 dma_addr = pci_map_page(intel_private.pcidev, page, 0, 307 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); 308 if (pci_dma_mapping_error(intel_private.pcidev, dma_addr)) { 309 __free_page(page); 310 return -EINVAL; 311 } 312 313 intel_private.scratch_page_dma = dma_addr; 314 } else 315 intel_private.scratch_page_dma = page_to_phys(page); 316 317 intel_private.scratch_page = page; 318 319 return 0; 320 } 321 322 static void i810_write_entry(dma_addr_t addr, unsigned int entry, 323 unsigned int flags) 324 { 325 u32 pte_flags = I810_PTE_VALID; 326 327 switch (flags) { 328 case AGP_DCACHE_MEMORY: 329 pte_flags |= I810_PTE_LOCAL; 330 break; 331 case AGP_USER_CACHED_MEMORY: 332 pte_flags |= I830_PTE_SYSTEM_CACHED; 333 break; 334 } 335 336 writel_relaxed(addr | pte_flags, intel_private.gtt + entry); 337 } 338 339 static resource_size_t intel_gtt_stolen_size(void) 340 { 341 u16 gmch_ctrl; 342 u8 rdct; 343 int local = 0; 344 static const int ddt[4] = { 0, 16, 32, 64 }; 345 resource_size_t stolen_size = 0; 346 347 if (INTEL_GTT_GEN == 1) 348 return 0; /* no stolen mem on i81x */ 349 350 pci_read_config_word(intel_private.bridge_dev, 351 I830_GMCH_CTRL, &gmch_ctrl); 352 353 if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB || 354 intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) { 355 switch (gmch_ctrl & I830_GMCH_GMS_MASK) { 356 case I830_GMCH_GMS_STOLEN_512: 357 stolen_size = KB(512); 358 break; 359 case I830_GMCH_GMS_STOLEN_1024: 360 stolen_size = MB(1); 361 break; 362 case I830_GMCH_GMS_STOLEN_8192: 363 stolen_size = MB(8); 364 break; 365 case I830_GMCH_GMS_LOCAL: 366 rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE); 367 stolen_size = (I830_RDRAM_ND(rdct) + 1) * 368 MB(ddt[I830_RDRAM_DDT(rdct)]); 369 local = 1; 370 break; 371 default: 372 stolen_size = 0; 373 break; 374 } 375 } else { 376 switch (gmch_ctrl & I855_GMCH_GMS_MASK) { 377 case I855_GMCH_GMS_STOLEN_1M: 378 stolen_size = MB(1); 379 break; 380 case I855_GMCH_GMS_STOLEN_4M: 381 stolen_size = MB(4); 382 break; 383 case I855_GMCH_GMS_STOLEN_8M: 384 stolen_size = MB(8); 385 break; 386 case I855_GMCH_GMS_STOLEN_16M: 387 stolen_size = MB(16); 388 break; 389 case I855_GMCH_GMS_STOLEN_32M: 390 stolen_size = MB(32); 391 break; 392 case I915_GMCH_GMS_STOLEN_48M: 393 stolen_size = MB(48); 394 break; 395 case I915_GMCH_GMS_STOLEN_64M: 396 stolen_size = MB(64); 397 break; 398 case G33_GMCH_GMS_STOLEN_128M: 399 stolen_size = MB(128); 400 break; 401 case G33_GMCH_GMS_STOLEN_256M: 402 stolen_size = MB(256); 403 break; 404 case INTEL_GMCH_GMS_STOLEN_96M: 405 stolen_size = MB(96); 406 break; 407 case INTEL_GMCH_GMS_STOLEN_160M: 408 stolen_size = MB(160); 409 break; 410 case INTEL_GMCH_GMS_STOLEN_224M: 411 stolen_size = MB(224); 412 break; 413 case INTEL_GMCH_GMS_STOLEN_352M: 414 stolen_size = MB(352); 415 break; 416 default: 417 stolen_size = 0; 418 break; 419 } 420 } 421 422 if (stolen_size > 0) { 423 dev_info(&intel_private.bridge_dev->dev, "detected %lluK %s memory\n", 424 (u64)stolen_size / KB(1), local ? "local" : "stolen"); 425 } else { 426 dev_info(&intel_private.bridge_dev->dev, 427 "no pre-allocated video memory detected\n"); 428 stolen_size = 0; 429 } 430 431 return stolen_size; 432 } 433 434 static void i965_adjust_pgetbl_size(unsigned int size_flag) 435 { 436 u32 pgetbl_ctl, pgetbl_ctl2; 437 438 /* ensure that ppgtt is disabled */ 439 pgetbl_ctl2 = readl(intel_private.registers+I965_PGETBL_CTL2); 440 pgetbl_ctl2 &= ~I810_PGETBL_ENABLED; 441 writel(pgetbl_ctl2, intel_private.registers+I965_PGETBL_CTL2); 442 443 /* write the new ggtt size */ 444 pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL); 445 pgetbl_ctl &= ~I965_PGETBL_SIZE_MASK; 446 pgetbl_ctl |= size_flag; 447 writel(pgetbl_ctl, intel_private.registers+I810_PGETBL_CTL); 448 } 449 450 static unsigned int i965_gtt_total_entries(void) 451 { 452 int size; 453 u32 pgetbl_ctl; 454 u16 gmch_ctl; 455 456 pci_read_config_word(intel_private.bridge_dev, 457 I830_GMCH_CTRL, &gmch_ctl); 458 459 if (INTEL_GTT_GEN == 5) { 460 switch (gmch_ctl & G4x_GMCH_SIZE_MASK) { 461 case G4x_GMCH_SIZE_1M: 462 case G4x_GMCH_SIZE_VT_1M: 463 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1MB); 464 break; 465 case G4x_GMCH_SIZE_VT_1_5M: 466 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_1_5MB); 467 break; 468 case G4x_GMCH_SIZE_2M: 469 case G4x_GMCH_SIZE_VT_2M: 470 i965_adjust_pgetbl_size(I965_PGETBL_SIZE_2MB); 471 break; 472 } 473 } 474 475 pgetbl_ctl = readl(intel_private.registers+I810_PGETBL_CTL); 476 477 switch (pgetbl_ctl & I965_PGETBL_SIZE_MASK) { 478 case I965_PGETBL_SIZE_128KB: 479 size = KB(128); 480 break; 481 case I965_PGETBL_SIZE_256KB: 482 size = KB(256); 483 break; 484 case I965_PGETBL_SIZE_512KB: 485 size = KB(512); 486 break; 487 /* GTT pagetable sizes bigger than 512KB are not possible on G33! */ 488 case I965_PGETBL_SIZE_1MB: 489 size = KB(1024); 490 break; 491 case I965_PGETBL_SIZE_2MB: 492 size = KB(2048); 493 break; 494 case I965_PGETBL_SIZE_1_5MB: 495 size = KB(1024 + 512); 496 break; 497 default: 498 dev_info(&intel_private.pcidev->dev, 499 "unknown page table size, assuming 512KB\n"); 500 size = KB(512); 501 } 502 503 return size/4; 504 } 505 506 static unsigned int intel_gtt_total_entries(void) 507 { 508 if (IS_G33 || INTEL_GTT_GEN == 4 || INTEL_GTT_GEN == 5) 509 return i965_gtt_total_entries(); 510 else { 511 /* On previous hardware, the GTT size was just what was 512 * required to map the aperture. 513 */ 514 return intel_private.gtt_mappable_entries; 515 } 516 } 517 518 static unsigned int intel_gtt_mappable_entries(void) 519 { 520 unsigned int aperture_size; 521 522 if (INTEL_GTT_GEN == 1) { 523 u32 smram_miscc; 524 525 pci_read_config_dword(intel_private.bridge_dev, 526 I810_SMRAM_MISCC, &smram_miscc); 527 528 if ((smram_miscc & I810_GFX_MEM_WIN_SIZE) 529 == I810_GFX_MEM_WIN_32M) 530 aperture_size = MB(32); 531 else 532 aperture_size = MB(64); 533 } else if (INTEL_GTT_GEN == 2) { 534 u16 gmch_ctrl; 535 536 pci_read_config_word(intel_private.bridge_dev, 537 I830_GMCH_CTRL, &gmch_ctrl); 538 539 if ((gmch_ctrl & I830_GMCH_MEM_MASK) == I830_GMCH_MEM_64M) 540 aperture_size = MB(64); 541 else 542 aperture_size = MB(128); 543 } else { 544 /* 9xx supports large sizes, just look at the length */ 545 aperture_size = pci_resource_len(intel_private.pcidev, 2); 546 } 547 548 return aperture_size >> PAGE_SHIFT; 549 } 550 551 static void intel_gtt_teardown_scratch_page(void) 552 { 553 set_pages_wb(intel_private.scratch_page, 1); 554 if (intel_private.needs_dmar) 555 pci_unmap_page(intel_private.pcidev, 556 intel_private.scratch_page_dma, 557 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); 558 __free_page(intel_private.scratch_page); 559 } 560 561 static void intel_gtt_cleanup(void) 562 { 563 intel_private.driver->cleanup(); 564 565 iounmap(intel_private.gtt); 566 iounmap(intel_private.registers); 567 568 intel_gtt_teardown_scratch_page(); 569 } 570 571 /* Certain Gen5 chipsets require require idling the GPU before 572 * unmapping anything from the GTT when VT-d is enabled. 573 */ 574 static inline int needs_ilk_vtd_wa(void) 575 { 576 #ifdef CONFIG_INTEL_IOMMU 577 const unsigned short gpu_devid = intel_private.pcidev->device; 578 579 /* Query intel_iommu to see if we need the workaround. Presumably that 580 * was loaded first. 581 */ 582 if ((gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_D_IG || 583 gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG) && 584 intel_iommu_gfx_mapped) 585 return 1; 586 #endif 587 return 0; 588 } 589 590 static bool intel_gtt_can_wc(void) 591 { 592 if (INTEL_GTT_GEN <= 2) 593 return false; 594 595 if (INTEL_GTT_GEN >= 6) 596 return false; 597 598 /* Reports of major corruption with ILK vt'd enabled */ 599 if (needs_ilk_vtd_wa()) 600 return false; 601 602 return true; 603 } 604 605 static int intel_gtt_init(void) 606 { 607 u32 gtt_map_size; 608 int ret, bar; 609 610 ret = intel_private.driver->setup(); 611 if (ret != 0) 612 return ret; 613 614 intel_private.gtt_mappable_entries = intel_gtt_mappable_entries(); 615 intel_private.gtt_total_entries = intel_gtt_total_entries(); 616 617 /* save the PGETBL reg for resume */ 618 intel_private.PGETBL_save = 619 readl(intel_private.registers+I810_PGETBL_CTL) 620 & ~I810_PGETBL_ENABLED; 621 /* we only ever restore the register when enabling the PGTBL... */ 622 if (HAS_PGTBL_EN) 623 intel_private.PGETBL_save |= I810_PGETBL_ENABLED; 624 625 dev_info(&intel_private.bridge_dev->dev, 626 "detected gtt size: %dK total, %dK mappable\n", 627 intel_private.gtt_total_entries * 4, 628 intel_private.gtt_mappable_entries * 4); 629 630 gtt_map_size = intel_private.gtt_total_entries * 4; 631 632 intel_private.gtt = NULL; 633 if (intel_gtt_can_wc()) 634 intel_private.gtt = ioremap_wc(intel_private.gtt_phys_addr, 635 gtt_map_size); 636 if (intel_private.gtt == NULL) 637 intel_private.gtt = ioremap(intel_private.gtt_phys_addr, 638 gtt_map_size); 639 if (intel_private.gtt == NULL) { 640 intel_private.driver->cleanup(); 641 iounmap(intel_private.registers); 642 return -ENOMEM; 643 } 644 645 #if IS_ENABLED(CONFIG_AGP_INTEL) 646 global_cache_flush(); /* FIXME: ? */ 647 #endif 648 649 intel_private.stolen_size = intel_gtt_stolen_size(); 650 651 intel_private.needs_dmar = USE_PCI_DMA_API && INTEL_GTT_GEN > 2; 652 653 ret = intel_gtt_setup_scratch_page(); 654 if (ret != 0) { 655 intel_gtt_cleanup(); 656 return ret; 657 } 658 659 if (INTEL_GTT_GEN <= 2) 660 bar = I810_GMADR_BAR; 661 else 662 bar = I915_GMADR_BAR; 663 664 intel_private.gma_bus_addr = pci_bus_address(intel_private.pcidev, bar); 665 return 0; 666 } 667 668 #if IS_ENABLED(CONFIG_AGP_INTEL) 669 static const struct aper_size_info_fixed intel_fake_agp_sizes[] = { 670 {32, 8192, 3}, 671 {64, 16384, 4}, 672 {128, 32768, 5}, 673 {256, 65536, 6}, 674 {512, 131072, 7}, 675 }; 676 677 static int intel_fake_agp_fetch_size(void) 678 { 679 int num_sizes = ARRAY_SIZE(intel_fake_agp_sizes); 680 unsigned int aper_size; 681 int i; 682 683 aper_size = (intel_private.gtt_mappable_entries << PAGE_SHIFT) / MB(1); 684 685 for (i = 0; i < num_sizes; i++) { 686 if (aper_size == intel_fake_agp_sizes[i].size) { 687 agp_bridge->current_size = 688 (void *) (intel_fake_agp_sizes + i); 689 return aper_size; 690 } 691 } 692 693 return 0; 694 } 695 #endif 696 697 static void i830_cleanup(void) 698 { 699 } 700 701 /* The chipset_flush interface needs to get data that has already been 702 * flushed out of the CPU all the way out to main memory, because the GPU 703 * doesn't snoop those buffers. 704 * 705 * The 8xx series doesn't have the same lovely interface for flushing the 706 * chipset write buffers that the later chips do. According to the 865 707 * specs, it's 64 octwords, or 1KB. So, to get those previous things in 708 * that buffer out, we just fill 1KB and clflush it out, on the assumption 709 * that it'll push whatever was in there out. It appears to work. 710 */ 711 static void i830_chipset_flush(void) 712 { 713 unsigned long timeout = jiffies + msecs_to_jiffies(1000); 714 715 /* Forcibly evict everything from the CPU write buffers. 716 * clflush appears to be insufficient. 717 */ 718 wbinvd_on_all_cpus(); 719 720 /* Now we've only seen documents for this magic bit on 855GM, 721 * we hope it exists for the other gen2 chipsets... 722 * 723 * Also works as advertised on my 845G. 724 */ 725 writel(readl(intel_private.registers+I830_HIC) | (1<<31), 726 intel_private.registers+I830_HIC); 727 728 while (readl(intel_private.registers+I830_HIC) & (1<<31)) { 729 if (time_after(jiffies, timeout)) 730 break; 731 732 udelay(50); 733 } 734 } 735 736 static void i830_write_entry(dma_addr_t addr, unsigned int entry, 737 unsigned int flags) 738 { 739 u32 pte_flags = I810_PTE_VALID; 740 741 if (flags == AGP_USER_CACHED_MEMORY) 742 pte_flags |= I830_PTE_SYSTEM_CACHED; 743 744 writel_relaxed(addr | pte_flags, intel_private.gtt + entry); 745 } 746 747 bool intel_enable_gtt(void) 748 { 749 u8 __iomem *reg; 750 751 if (INTEL_GTT_GEN == 2) { 752 u16 gmch_ctrl; 753 754 pci_read_config_word(intel_private.bridge_dev, 755 I830_GMCH_CTRL, &gmch_ctrl); 756 gmch_ctrl |= I830_GMCH_ENABLED; 757 pci_write_config_word(intel_private.bridge_dev, 758 I830_GMCH_CTRL, gmch_ctrl); 759 760 pci_read_config_word(intel_private.bridge_dev, 761 I830_GMCH_CTRL, &gmch_ctrl); 762 if ((gmch_ctrl & I830_GMCH_ENABLED) == 0) { 763 dev_err(&intel_private.pcidev->dev, 764 "failed to enable the GTT: GMCH_CTRL=%x\n", 765 gmch_ctrl); 766 return false; 767 } 768 } 769 770 /* On the resume path we may be adjusting the PGTBL value, so 771 * be paranoid and flush all chipset write buffers... 772 */ 773 if (INTEL_GTT_GEN >= 3) 774 writel(0, intel_private.registers+GFX_FLSH_CNTL); 775 776 reg = intel_private.registers+I810_PGETBL_CTL; 777 writel(intel_private.PGETBL_save, reg); 778 if (HAS_PGTBL_EN && (readl(reg) & I810_PGETBL_ENABLED) == 0) { 779 dev_err(&intel_private.pcidev->dev, 780 "failed to enable the GTT: PGETBL=%x [expected %x]\n", 781 readl(reg), intel_private.PGETBL_save); 782 return false; 783 } 784 785 if (INTEL_GTT_GEN >= 3) 786 writel(0, intel_private.registers+GFX_FLSH_CNTL); 787 788 return true; 789 } 790 EXPORT_SYMBOL(intel_enable_gtt); 791 792 static int i830_setup(void) 793 { 794 phys_addr_t reg_addr; 795 796 reg_addr = pci_resource_start(intel_private.pcidev, I810_MMADR_BAR); 797 798 intel_private.registers = ioremap(reg_addr, KB(64)); 799 if (!intel_private.registers) 800 return -ENOMEM; 801 802 intel_private.gtt_phys_addr = reg_addr + I810_PTE_BASE; 803 804 return 0; 805 } 806 807 #if IS_ENABLED(CONFIG_AGP_INTEL) 808 static int intel_fake_agp_create_gatt_table(struct agp_bridge_data *bridge) 809 { 810 agp_bridge->gatt_table_real = NULL; 811 agp_bridge->gatt_table = NULL; 812 agp_bridge->gatt_bus_addr = 0; 813 814 return 0; 815 } 816 817 static int intel_fake_agp_free_gatt_table(struct agp_bridge_data *bridge) 818 { 819 return 0; 820 } 821 822 static int intel_fake_agp_configure(void) 823 { 824 if (!intel_enable_gtt()) 825 return -EIO; 826 827 intel_private.clear_fake_agp = true; 828 agp_bridge->gart_bus_addr = intel_private.gma_bus_addr; 829 830 return 0; 831 } 832 #endif 833 834 static bool i830_check_flags(unsigned int flags) 835 { 836 switch (flags) { 837 case 0: 838 case AGP_PHYS_MEMORY: 839 case AGP_USER_CACHED_MEMORY: 840 case AGP_USER_MEMORY: 841 return true; 842 } 843 844 return false; 845 } 846 847 void intel_gtt_insert_page(dma_addr_t addr, 848 unsigned int pg, 849 unsigned int flags) 850 { 851 intel_private.driver->write_entry(addr, pg, flags); 852 readl(intel_private.gtt + pg); 853 if (intel_private.driver->chipset_flush) 854 intel_private.driver->chipset_flush(); 855 } 856 EXPORT_SYMBOL(intel_gtt_insert_page); 857 858 void intel_gtt_insert_sg_entries(struct sg_table *st, 859 unsigned int pg_start, 860 unsigned int flags) 861 { 862 struct scatterlist *sg; 863 unsigned int len, m; 864 int i, j; 865 866 j = pg_start; 867 868 /* sg may merge pages, but we have to separate 869 * per-page addr for GTT */ 870 for_each_sg(st->sgl, sg, st->nents, i) { 871 len = sg_dma_len(sg) >> PAGE_SHIFT; 872 for (m = 0; m < len; m++) { 873 dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); 874 intel_private.driver->write_entry(addr, j, flags); 875 j++; 876 } 877 } 878 readl(intel_private.gtt + j - 1); 879 if (intel_private.driver->chipset_flush) 880 intel_private.driver->chipset_flush(); 881 } 882 EXPORT_SYMBOL(intel_gtt_insert_sg_entries); 883 884 #if IS_ENABLED(CONFIG_AGP_INTEL) 885 static void intel_gtt_insert_pages(unsigned int first_entry, 886 unsigned int num_entries, 887 struct page **pages, 888 unsigned int flags) 889 { 890 int i, j; 891 892 for (i = 0, j = first_entry; i < num_entries; i++, j++) { 893 dma_addr_t addr = page_to_phys(pages[i]); 894 intel_private.driver->write_entry(addr, 895 j, flags); 896 } 897 wmb(); 898 } 899 900 static int intel_fake_agp_insert_entries(struct agp_memory *mem, 901 off_t pg_start, int type) 902 { 903 int ret = -EINVAL; 904 905 if (intel_private.clear_fake_agp) { 906 int start = intel_private.stolen_size / PAGE_SIZE; 907 int end = intel_private.gtt_mappable_entries; 908 intel_gtt_clear_range(start, end - start); 909 intel_private.clear_fake_agp = false; 910 } 911 912 if (INTEL_GTT_GEN == 1 && type == AGP_DCACHE_MEMORY) 913 return i810_insert_dcache_entries(mem, pg_start, type); 914 915 if (mem->page_count == 0) 916 goto out; 917 918 if (pg_start + mem->page_count > intel_private.gtt_total_entries) 919 goto out_err; 920 921 if (type != mem->type) 922 goto out_err; 923 924 if (!intel_private.driver->check_flags(type)) 925 goto out_err; 926 927 if (!mem->is_flushed) 928 global_cache_flush(); 929 930 if (intel_private.needs_dmar) { 931 struct sg_table st; 932 933 ret = intel_gtt_map_memory(mem->pages, mem->page_count, &st); 934 if (ret != 0) 935 return ret; 936 937 intel_gtt_insert_sg_entries(&st, pg_start, type); 938 mem->sg_list = st.sgl; 939 mem->num_sg = st.nents; 940 } else 941 intel_gtt_insert_pages(pg_start, mem->page_count, mem->pages, 942 type); 943 944 out: 945 ret = 0; 946 out_err: 947 mem->is_flushed = true; 948 return ret; 949 } 950 #endif 951 952 void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries) 953 { 954 unsigned int i; 955 956 for (i = first_entry; i < (first_entry + num_entries); i++) { 957 intel_private.driver->write_entry(intel_private.scratch_page_dma, 958 i, 0); 959 } 960 wmb(); 961 } 962 EXPORT_SYMBOL(intel_gtt_clear_range); 963 964 #if IS_ENABLED(CONFIG_AGP_INTEL) 965 static int intel_fake_agp_remove_entries(struct agp_memory *mem, 966 off_t pg_start, int type) 967 { 968 if (mem->page_count == 0) 969 return 0; 970 971 intel_gtt_clear_range(pg_start, mem->page_count); 972 973 if (intel_private.needs_dmar) { 974 intel_gtt_unmap_memory(mem->sg_list, mem->num_sg); 975 mem->sg_list = NULL; 976 mem->num_sg = 0; 977 } 978 979 return 0; 980 } 981 982 static struct agp_memory *intel_fake_agp_alloc_by_type(size_t pg_count, 983 int type) 984 { 985 struct agp_memory *new; 986 987 if (type == AGP_DCACHE_MEMORY && INTEL_GTT_GEN == 1) { 988 if (pg_count != intel_private.num_dcache_entries) 989 return NULL; 990 991 new = agp_create_memory(1); 992 if (new == NULL) 993 return NULL; 994 995 new->type = AGP_DCACHE_MEMORY; 996 new->page_count = pg_count; 997 new->num_scratch_pages = 0; 998 agp_free_page_array(new); 999 return new; 1000 } 1001 if (type == AGP_PHYS_MEMORY) 1002 return alloc_agpphysmem_i8xx(pg_count, type); 1003 /* always return NULL for other allocation types for now */ 1004 return NULL; 1005 } 1006 #endif 1007 1008 static int intel_alloc_chipset_flush_resource(void) 1009 { 1010 int ret; 1011 ret = pci_bus_alloc_resource(intel_private.bridge_dev->bus, &intel_private.ifp_resource, PAGE_SIZE, 1012 PAGE_SIZE, PCIBIOS_MIN_MEM, 0, 1013 pcibios_align_resource, intel_private.bridge_dev); 1014 1015 return ret; 1016 } 1017 1018 static void intel_i915_setup_chipset_flush(void) 1019 { 1020 int ret; 1021 u32 temp; 1022 1023 pci_read_config_dword(intel_private.bridge_dev, I915_IFPADDR, &temp); 1024 if (!(temp & 0x1)) { 1025 intel_alloc_chipset_flush_resource(); 1026 intel_private.resource_valid = 1; 1027 pci_write_config_dword(intel_private.bridge_dev, I915_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1); 1028 } else { 1029 temp &= ~1; 1030 1031 intel_private.resource_valid = 1; 1032 intel_private.ifp_resource.start = temp; 1033 intel_private.ifp_resource.end = temp + PAGE_SIZE; 1034 ret = request_resource(&iomem_resource, &intel_private.ifp_resource); 1035 /* some BIOSes reserve this area in a pnp some don't */ 1036 if (ret) 1037 intel_private.resource_valid = 0; 1038 } 1039 } 1040 1041 static void intel_i965_g33_setup_chipset_flush(void) 1042 { 1043 u32 temp_hi, temp_lo; 1044 int ret; 1045 1046 pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4, &temp_hi); 1047 pci_read_config_dword(intel_private.bridge_dev, I965_IFPADDR, &temp_lo); 1048 1049 if (!(temp_lo & 0x1)) { 1050 1051 intel_alloc_chipset_flush_resource(); 1052 1053 intel_private.resource_valid = 1; 1054 pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR + 4, 1055 upper_32_bits(intel_private.ifp_resource.start)); 1056 pci_write_config_dword(intel_private.bridge_dev, I965_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1); 1057 } else { 1058 u64 l64; 1059 1060 temp_lo &= ~0x1; 1061 l64 = ((u64)temp_hi << 32) | temp_lo; 1062 1063 intel_private.resource_valid = 1; 1064 intel_private.ifp_resource.start = l64; 1065 intel_private.ifp_resource.end = l64 + PAGE_SIZE; 1066 ret = request_resource(&iomem_resource, &intel_private.ifp_resource); 1067 /* some BIOSes reserve this area in a pnp some don't */ 1068 if (ret) 1069 intel_private.resource_valid = 0; 1070 } 1071 } 1072 1073 static void intel_i9xx_setup_flush(void) 1074 { 1075 /* return if already configured */ 1076 if (intel_private.ifp_resource.start) 1077 return; 1078 1079 if (INTEL_GTT_GEN == 6) 1080 return; 1081 1082 /* setup a resource for this object */ 1083 intel_private.ifp_resource.name = "Intel Flush Page"; 1084 intel_private.ifp_resource.flags = IORESOURCE_MEM; 1085 1086 /* Setup chipset flush for 915 */ 1087 if (IS_G33 || INTEL_GTT_GEN >= 4) { 1088 intel_i965_g33_setup_chipset_flush(); 1089 } else { 1090 intel_i915_setup_chipset_flush(); 1091 } 1092 1093 if (intel_private.ifp_resource.start) 1094 intel_private.i9xx_flush_page = ioremap(intel_private.ifp_resource.start, PAGE_SIZE); 1095 if (!intel_private.i9xx_flush_page) 1096 dev_err(&intel_private.pcidev->dev, 1097 "can't ioremap flush page - no chipset flushing\n"); 1098 } 1099 1100 static void i9xx_cleanup(void) 1101 { 1102 if (intel_private.i9xx_flush_page) 1103 iounmap(intel_private.i9xx_flush_page); 1104 if (intel_private.resource_valid) 1105 release_resource(&intel_private.ifp_resource); 1106 intel_private.ifp_resource.start = 0; 1107 intel_private.resource_valid = 0; 1108 } 1109 1110 static void i9xx_chipset_flush(void) 1111 { 1112 wmb(); 1113 if (intel_private.i9xx_flush_page) 1114 writel(1, intel_private.i9xx_flush_page); 1115 } 1116 1117 static void i965_write_entry(dma_addr_t addr, 1118 unsigned int entry, 1119 unsigned int flags) 1120 { 1121 u32 pte_flags; 1122 1123 pte_flags = I810_PTE_VALID; 1124 if (flags == AGP_USER_CACHED_MEMORY) 1125 pte_flags |= I830_PTE_SYSTEM_CACHED; 1126 1127 /* Shift high bits down */ 1128 addr |= (addr >> 28) & 0xf0; 1129 writel_relaxed(addr | pte_flags, intel_private.gtt + entry); 1130 } 1131 1132 static int i9xx_setup(void) 1133 { 1134 phys_addr_t reg_addr; 1135 int size = KB(512); 1136 1137 reg_addr = pci_resource_start(intel_private.pcidev, I915_MMADR_BAR); 1138 1139 intel_private.registers = ioremap(reg_addr, size); 1140 if (!intel_private.registers) 1141 return -ENOMEM; 1142 1143 switch (INTEL_GTT_GEN) { 1144 case 3: 1145 intel_private.gtt_phys_addr = 1146 pci_resource_start(intel_private.pcidev, I915_PTE_BAR); 1147 break; 1148 case 5: 1149 intel_private.gtt_phys_addr = reg_addr + MB(2); 1150 break; 1151 default: 1152 intel_private.gtt_phys_addr = reg_addr + KB(512); 1153 break; 1154 } 1155 1156 intel_i9xx_setup_flush(); 1157 1158 return 0; 1159 } 1160 1161 #if IS_ENABLED(CONFIG_AGP_INTEL) 1162 static const struct agp_bridge_driver intel_fake_agp_driver = { 1163 .owner = THIS_MODULE, 1164 .size_type = FIXED_APER_SIZE, 1165 .aperture_sizes = intel_fake_agp_sizes, 1166 .num_aperture_sizes = ARRAY_SIZE(intel_fake_agp_sizes), 1167 .configure = intel_fake_agp_configure, 1168 .fetch_size = intel_fake_agp_fetch_size, 1169 .cleanup = intel_gtt_cleanup, 1170 .agp_enable = intel_fake_agp_enable, 1171 .cache_flush = global_cache_flush, 1172 .create_gatt_table = intel_fake_agp_create_gatt_table, 1173 .free_gatt_table = intel_fake_agp_free_gatt_table, 1174 .insert_memory = intel_fake_agp_insert_entries, 1175 .remove_memory = intel_fake_agp_remove_entries, 1176 .alloc_by_type = intel_fake_agp_alloc_by_type, 1177 .free_by_type = intel_i810_free_by_type, 1178 .agp_alloc_page = agp_generic_alloc_page, 1179 .agp_alloc_pages = agp_generic_alloc_pages, 1180 .agp_destroy_page = agp_generic_destroy_page, 1181 .agp_destroy_pages = agp_generic_destroy_pages, 1182 }; 1183 #endif 1184 1185 static const struct intel_gtt_driver i81x_gtt_driver = { 1186 .gen = 1, 1187 .has_pgtbl_enable = 1, 1188 .dma_mask_size = 32, 1189 .setup = i810_setup, 1190 .cleanup = i810_cleanup, 1191 .check_flags = i830_check_flags, 1192 .write_entry = i810_write_entry, 1193 }; 1194 static const struct intel_gtt_driver i8xx_gtt_driver = { 1195 .gen = 2, 1196 .has_pgtbl_enable = 1, 1197 .setup = i830_setup, 1198 .cleanup = i830_cleanup, 1199 .write_entry = i830_write_entry, 1200 .dma_mask_size = 32, 1201 .check_flags = i830_check_flags, 1202 .chipset_flush = i830_chipset_flush, 1203 }; 1204 static const struct intel_gtt_driver i915_gtt_driver = { 1205 .gen = 3, 1206 .has_pgtbl_enable = 1, 1207 .setup = i9xx_setup, 1208 .cleanup = i9xx_cleanup, 1209 /* i945 is the last gpu to need phys mem (for overlay and cursors). */ 1210 .write_entry = i830_write_entry, 1211 .dma_mask_size = 32, 1212 .check_flags = i830_check_flags, 1213 .chipset_flush = i9xx_chipset_flush, 1214 }; 1215 static const struct intel_gtt_driver g33_gtt_driver = { 1216 .gen = 3, 1217 .is_g33 = 1, 1218 .setup = i9xx_setup, 1219 .cleanup = i9xx_cleanup, 1220 .write_entry = i965_write_entry, 1221 .dma_mask_size = 36, 1222 .check_flags = i830_check_flags, 1223 .chipset_flush = i9xx_chipset_flush, 1224 }; 1225 static const struct intel_gtt_driver pineview_gtt_driver = { 1226 .gen = 3, 1227 .is_pineview = 1, .is_g33 = 1, 1228 .setup = i9xx_setup, 1229 .cleanup = i9xx_cleanup, 1230 .write_entry = i965_write_entry, 1231 .dma_mask_size = 36, 1232 .check_flags = i830_check_flags, 1233 .chipset_flush = i9xx_chipset_flush, 1234 }; 1235 static const struct intel_gtt_driver i965_gtt_driver = { 1236 .gen = 4, 1237 .has_pgtbl_enable = 1, 1238 .setup = i9xx_setup, 1239 .cleanup = i9xx_cleanup, 1240 .write_entry = i965_write_entry, 1241 .dma_mask_size = 36, 1242 .check_flags = i830_check_flags, 1243 .chipset_flush = i9xx_chipset_flush, 1244 }; 1245 static const struct intel_gtt_driver g4x_gtt_driver = { 1246 .gen = 5, 1247 .setup = i9xx_setup, 1248 .cleanup = i9xx_cleanup, 1249 .write_entry = i965_write_entry, 1250 .dma_mask_size = 36, 1251 .check_flags = i830_check_flags, 1252 .chipset_flush = i9xx_chipset_flush, 1253 }; 1254 static const struct intel_gtt_driver ironlake_gtt_driver = { 1255 .gen = 5, 1256 .is_ironlake = 1, 1257 .setup = i9xx_setup, 1258 .cleanup = i9xx_cleanup, 1259 .write_entry = i965_write_entry, 1260 .dma_mask_size = 36, 1261 .check_flags = i830_check_flags, 1262 .chipset_flush = i9xx_chipset_flush, 1263 }; 1264 1265 /* Table to describe Intel GMCH and AGP/PCIE GART drivers. At least one of 1266 * driver and gmch_driver must be non-null, and find_gmch will determine 1267 * which one should be used if a gmch_chip_id is present. 1268 */ 1269 static const struct intel_gtt_driver_description { 1270 unsigned int gmch_chip_id; 1271 char *name; 1272 const struct intel_gtt_driver *gtt_driver; 1273 } intel_gtt_chipsets[] = { 1274 { PCI_DEVICE_ID_INTEL_82810_IG1, "i810", 1275 &i81x_gtt_driver}, 1276 { PCI_DEVICE_ID_INTEL_82810_IG3, "i810", 1277 &i81x_gtt_driver}, 1278 { PCI_DEVICE_ID_INTEL_82810E_IG, "i810", 1279 &i81x_gtt_driver}, 1280 { PCI_DEVICE_ID_INTEL_82815_CGC, "i815", 1281 &i81x_gtt_driver}, 1282 { PCI_DEVICE_ID_INTEL_82830_CGC, "830M", 1283 &i8xx_gtt_driver}, 1284 { PCI_DEVICE_ID_INTEL_82845G_IG, "845G", 1285 &i8xx_gtt_driver}, 1286 { PCI_DEVICE_ID_INTEL_82854_IG, "854", 1287 &i8xx_gtt_driver}, 1288 { PCI_DEVICE_ID_INTEL_82855GM_IG, "855GM", 1289 &i8xx_gtt_driver}, 1290 { PCI_DEVICE_ID_INTEL_82865_IG, "865", 1291 &i8xx_gtt_driver}, 1292 { PCI_DEVICE_ID_INTEL_E7221_IG, "E7221 (i915)", 1293 &i915_gtt_driver }, 1294 { PCI_DEVICE_ID_INTEL_82915G_IG, "915G", 1295 &i915_gtt_driver }, 1296 { PCI_DEVICE_ID_INTEL_82915GM_IG, "915GM", 1297 &i915_gtt_driver }, 1298 { PCI_DEVICE_ID_INTEL_82945G_IG, "945G", 1299 &i915_gtt_driver }, 1300 { PCI_DEVICE_ID_INTEL_82945GM_IG, "945GM", 1301 &i915_gtt_driver }, 1302 { PCI_DEVICE_ID_INTEL_82945GME_IG, "945GME", 1303 &i915_gtt_driver }, 1304 { PCI_DEVICE_ID_INTEL_82946GZ_IG, "946GZ", 1305 &i965_gtt_driver }, 1306 { PCI_DEVICE_ID_INTEL_82G35_IG, "G35", 1307 &i965_gtt_driver }, 1308 { PCI_DEVICE_ID_INTEL_82965Q_IG, "965Q", 1309 &i965_gtt_driver }, 1310 { PCI_DEVICE_ID_INTEL_82965G_IG, "965G", 1311 &i965_gtt_driver }, 1312 { PCI_DEVICE_ID_INTEL_82965GM_IG, "965GM", 1313 &i965_gtt_driver }, 1314 { PCI_DEVICE_ID_INTEL_82965GME_IG, "965GME/GLE", 1315 &i965_gtt_driver }, 1316 { PCI_DEVICE_ID_INTEL_G33_IG, "G33", 1317 &g33_gtt_driver }, 1318 { PCI_DEVICE_ID_INTEL_Q35_IG, "Q35", 1319 &g33_gtt_driver }, 1320 { PCI_DEVICE_ID_INTEL_Q33_IG, "Q33", 1321 &g33_gtt_driver }, 1322 { PCI_DEVICE_ID_INTEL_PINEVIEW_M_IG, "GMA3150", 1323 &pineview_gtt_driver }, 1324 { PCI_DEVICE_ID_INTEL_PINEVIEW_IG, "GMA3150", 1325 &pineview_gtt_driver }, 1326 { PCI_DEVICE_ID_INTEL_GM45_IG, "GM45", 1327 &g4x_gtt_driver }, 1328 { PCI_DEVICE_ID_INTEL_EAGLELAKE_IG, "Eaglelake", 1329 &g4x_gtt_driver }, 1330 { PCI_DEVICE_ID_INTEL_Q45_IG, "Q45/Q43", 1331 &g4x_gtt_driver }, 1332 { PCI_DEVICE_ID_INTEL_G45_IG, "G45/G43", 1333 &g4x_gtt_driver }, 1334 { PCI_DEVICE_ID_INTEL_B43_IG, "B43", 1335 &g4x_gtt_driver }, 1336 { PCI_DEVICE_ID_INTEL_B43_1_IG, "B43", 1337 &g4x_gtt_driver }, 1338 { PCI_DEVICE_ID_INTEL_G41_IG, "G41", 1339 &g4x_gtt_driver }, 1340 { PCI_DEVICE_ID_INTEL_IRONLAKE_D_IG, 1341 "HD Graphics", &ironlake_gtt_driver }, 1342 { PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG, 1343 "HD Graphics", &ironlake_gtt_driver }, 1344 { 0, NULL, NULL } 1345 }; 1346 1347 static int find_gmch(u16 device) 1348 { 1349 struct pci_dev *gmch_device; 1350 1351 gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL); 1352 if (gmch_device && PCI_FUNC(gmch_device->devfn) != 0) { 1353 gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL, 1354 device, gmch_device); 1355 } 1356 1357 if (!gmch_device) 1358 return 0; 1359 1360 intel_private.pcidev = gmch_device; 1361 return 1; 1362 } 1363 1364 int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev, 1365 struct agp_bridge_data *bridge) 1366 { 1367 int i, mask; 1368 1369 for (i = 0; intel_gtt_chipsets[i].name != NULL; i++) { 1370 if (gpu_pdev) { 1371 if (gpu_pdev->device == 1372 intel_gtt_chipsets[i].gmch_chip_id) { 1373 intel_private.pcidev = pci_dev_get(gpu_pdev); 1374 intel_private.driver = 1375 intel_gtt_chipsets[i].gtt_driver; 1376 1377 break; 1378 } 1379 } else if (find_gmch(intel_gtt_chipsets[i].gmch_chip_id)) { 1380 intel_private.driver = 1381 intel_gtt_chipsets[i].gtt_driver; 1382 break; 1383 } 1384 } 1385 1386 if (!intel_private.driver) 1387 return 0; 1388 1389 #if IS_ENABLED(CONFIG_AGP_INTEL) 1390 if (bridge) { 1391 if (INTEL_GTT_GEN > 1) 1392 return 0; 1393 1394 bridge->driver = &intel_fake_agp_driver; 1395 bridge->dev_private_data = &intel_private; 1396 bridge->dev = bridge_pdev; 1397 } 1398 #endif 1399 1400 1401 /* 1402 * Can be called from the fake agp driver but also directly from 1403 * drm/i915.ko. Hence we need to check whether everything is set up 1404 * already. 1405 */ 1406 if (intel_private.refcount++) 1407 return 1; 1408 1409 intel_private.bridge_dev = pci_dev_get(bridge_pdev); 1410 1411 dev_info(&bridge_pdev->dev, "Intel %s Chipset\n", intel_gtt_chipsets[i].name); 1412 1413 if (bridge) { 1414 mask = intel_private.driver->dma_mask_size; 1415 if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(mask))) 1416 dev_err(&intel_private.pcidev->dev, 1417 "set gfx device dma mask %d-bit failed!\n", 1418 mask); 1419 else 1420 pci_set_consistent_dma_mask(intel_private.pcidev, 1421 DMA_BIT_MASK(mask)); 1422 } 1423 1424 if (intel_gtt_init() != 0) { 1425 intel_gmch_remove(); 1426 1427 return 0; 1428 } 1429 1430 return 1; 1431 } 1432 EXPORT_SYMBOL(intel_gmch_probe); 1433 1434 void intel_gtt_get(u64 *gtt_total, 1435 phys_addr_t *mappable_base, 1436 resource_size_t *mappable_end) 1437 { 1438 *gtt_total = intel_private.gtt_total_entries << PAGE_SHIFT; 1439 *mappable_base = intel_private.gma_bus_addr; 1440 *mappable_end = intel_private.gtt_mappable_entries << PAGE_SHIFT; 1441 } 1442 EXPORT_SYMBOL(intel_gtt_get); 1443 1444 void intel_gtt_chipset_flush(void) 1445 { 1446 if (intel_private.driver->chipset_flush) 1447 intel_private.driver->chipset_flush(); 1448 } 1449 EXPORT_SYMBOL(intel_gtt_chipset_flush); 1450 1451 void intel_gmch_remove(void) 1452 { 1453 if (--intel_private.refcount) 1454 return; 1455 1456 if (intel_private.scratch_page) 1457 intel_gtt_teardown_scratch_page(); 1458 if (intel_private.pcidev) 1459 pci_dev_put(intel_private.pcidev); 1460 if (intel_private.bridge_dev) 1461 pci_dev_put(intel_private.bridge_dev); 1462 intel_private.driver = NULL; 1463 } 1464 EXPORT_SYMBOL(intel_gmch_remove); 1465 1466 MODULE_AUTHOR("Dave Jones, Various @Intel"); 1467 MODULE_LICENSE("GPL and additional rights"); 1468