1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #include <linux/dma-map-ops.h> 8 #include <linux/vmalloc.h> 9 #include <linux/spinlock.h> 10 #include <linux/shmem_fs.h> 11 #include <linux/dma-buf.h> 12 #include <linux/pfn_t.h> 13 14 #include <drm/drm_prime.h> 15 16 #include "msm_drv.h" 17 #include "msm_fence.h" 18 #include "msm_gem.h" 19 #include "msm_gpu.h" 20 #include "msm_mmu.h" 21 22 static void update_inactive(struct msm_gem_object *msm_obj); 23 24 static dma_addr_t physaddr(struct drm_gem_object *obj) 25 { 26 struct msm_gem_object *msm_obj = to_msm_bo(obj); 27 struct msm_drm_private *priv = obj->dev->dev_private; 28 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + 29 priv->vram.paddr; 30 } 31 32 static bool use_pages(struct drm_gem_object *obj) 33 { 34 struct msm_gem_object *msm_obj = to_msm_bo(obj); 35 return !msm_obj->vram_node; 36 } 37 38 /* 39 * Cache sync.. this is a bit over-complicated, to fit dma-mapping 40 * API. Really GPU cache is out of scope here (handled on cmdstream) 41 * and all we need to do is invalidate newly allocated pages before 42 * mapping to CPU as uncached/writecombine. 43 * 44 * On top of this, we have the added headache, that depending on 45 * display generation, the display's iommu may be wired up to either 46 * the toplevel drm device (mdss), or to the mdp sub-node, meaning 47 * that here we either have dma-direct or iommu ops. 48 * 49 * Let this be a cautionary tail of abstraction gone wrong. 50 */ 51 52 static void sync_for_device(struct msm_gem_object *msm_obj) 53 { 54 struct device *dev = msm_obj->base.dev->dev; 55 56 dma_map_sgtable(dev, msm_obj->sgt, DMA_BIDIRECTIONAL, 0); 57 } 58 59 static void sync_for_cpu(struct msm_gem_object *msm_obj) 60 { 61 struct device *dev = msm_obj->base.dev->dev; 62 63 dma_unmap_sgtable(dev, msm_obj->sgt, DMA_BIDIRECTIONAL, 0); 64 } 65 66 /* allocate pages from VRAM carveout, used when no IOMMU: */ 67 static struct page **get_pages_vram(struct drm_gem_object *obj, int npages) 68 { 69 struct msm_gem_object *msm_obj = to_msm_bo(obj); 70 struct msm_drm_private *priv = obj->dev->dev_private; 71 dma_addr_t paddr; 72 struct page **p; 73 int ret, i; 74 75 p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 76 if (!p) 77 return ERR_PTR(-ENOMEM); 78 79 spin_lock(&priv->vram.lock); 80 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages); 81 spin_unlock(&priv->vram.lock); 82 if (ret) { 83 kvfree(p); 84 return ERR_PTR(ret); 85 } 86 87 paddr = physaddr(obj); 88 for (i = 0; i < npages; i++) { 89 p[i] = pfn_to_page(__phys_to_pfn(paddr)); 90 paddr += PAGE_SIZE; 91 } 92 93 return p; 94 } 95 96 static struct page **get_pages(struct drm_gem_object *obj) 97 { 98 struct msm_gem_object *msm_obj = to_msm_bo(obj); 99 100 GEM_WARN_ON(!msm_gem_is_locked(obj)); 101 102 if (!msm_obj->pages) { 103 struct drm_device *dev = obj->dev; 104 struct page **p; 105 int npages = obj->size >> PAGE_SHIFT; 106 107 if (use_pages(obj)) 108 p = drm_gem_get_pages(obj); 109 else 110 p = get_pages_vram(obj, npages); 111 112 if (IS_ERR(p)) { 113 DRM_DEV_ERROR(dev->dev, "could not get pages: %ld\n", 114 PTR_ERR(p)); 115 return p; 116 } 117 118 msm_obj->pages = p; 119 120 msm_obj->sgt = drm_prime_pages_to_sg(obj->dev, p, npages); 121 if (IS_ERR(msm_obj->sgt)) { 122 void *ptr = ERR_CAST(msm_obj->sgt); 123 124 DRM_DEV_ERROR(dev->dev, "failed to allocate sgt\n"); 125 msm_obj->sgt = NULL; 126 return ptr; 127 } 128 129 /* For non-cached buffers, ensure the new pages are clean 130 * because display controller, GPU, etc. are not coherent: 131 */ 132 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 133 sync_for_device(msm_obj); 134 135 update_inactive(msm_obj); 136 } 137 138 return msm_obj->pages; 139 } 140 141 static void put_pages_vram(struct drm_gem_object *obj) 142 { 143 struct msm_gem_object *msm_obj = to_msm_bo(obj); 144 struct msm_drm_private *priv = obj->dev->dev_private; 145 146 spin_lock(&priv->vram.lock); 147 drm_mm_remove_node(msm_obj->vram_node); 148 spin_unlock(&priv->vram.lock); 149 150 kvfree(msm_obj->pages); 151 } 152 153 static void put_pages(struct drm_gem_object *obj) 154 { 155 struct msm_gem_object *msm_obj = to_msm_bo(obj); 156 157 if (msm_obj->pages) { 158 if (msm_obj->sgt) { 159 /* For non-cached buffers, ensure the new 160 * pages are clean because display controller, 161 * GPU, etc. are not coherent: 162 */ 163 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 164 sync_for_cpu(msm_obj); 165 166 sg_free_table(msm_obj->sgt); 167 kfree(msm_obj->sgt); 168 msm_obj->sgt = NULL; 169 } 170 171 if (use_pages(obj)) 172 drm_gem_put_pages(obj, msm_obj->pages, true, false); 173 else 174 put_pages_vram(obj); 175 176 msm_obj->pages = NULL; 177 } 178 } 179 180 struct page **msm_gem_get_pages(struct drm_gem_object *obj) 181 { 182 struct msm_gem_object *msm_obj = to_msm_bo(obj); 183 struct page **p; 184 185 msm_gem_lock(obj); 186 187 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 188 msm_gem_unlock(obj); 189 return ERR_PTR(-EBUSY); 190 } 191 192 p = get_pages(obj); 193 194 if (!IS_ERR(p)) { 195 msm_obj->pin_count++; 196 update_inactive(msm_obj); 197 } 198 199 msm_gem_unlock(obj); 200 return p; 201 } 202 203 void msm_gem_put_pages(struct drm_gem_object *obj) 204 { 205 struct msm_gem_object *msm_obj = to_msm_bo(obj); 206 207 msm_gem_lock(obj); 208 msm_obj->pin_count--; 209 GEM_WARN_ON(msm_obj->pin_count < 0); 210 update_inactive(msm_obj); 211 msm_gem_unlock(obj); 212 } 213 214 static pgprot_t msm_gem_pgprot(struct msm_gem_object *msm_obj, pgprot_t prot) 215 { 216 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 217 return pgprot_writecombine(prot); 218 return prot; 219 } 220 221 static vm_fault_t msm_gem_fault(struct vm_fault *vmf) 222 { 223 struct vm_area_struct *vma = vmf->vma; 224 struct drm_gem_object *obj = vma->vm_private_data; 225 struct msm_gem_object *msm_obj = to_msm_bo(obj); 226 struct page **pages; 227 unsigned long pfn; 228 pgoff_t pgoff; 229 int err; 230 vm_fault_t ret; 231 232 /* 233 * vm_ops.open/drm_gem_mmap_obj and close get and put 234 * a reference on obj. So, we dont need to hold one here. 235 */ 236 err = msm_gem_lock_interruptible(obj); 237 if (err) { 238 ret = VM_FAULT_NOPAGE; 239 goto out; 240 } 241 242 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 243 msm_gem_unlock(obj); 244 return VM_FAULT_SIGBUS; 245 } 246 247 /* make sure we have pages attached now */ 248 pages = get_pages(obj); 249 if (IS_ERR(pages)) { 250 ret = vmf_error(PTR_ERR(pages)); 251 goto out_unlock; 252 } 253 254 /* We don't use vmf->pgoff since that has the fake offset: */ 255 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 256 257 pfn = page_to_pfn(pages[pgoff]); 258 259 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 260 pfn, pfn << PAGE_SHIFT); 261 262 ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); 263 out_unlock: 264 msm_gem_unlock(obj); 265 out: 266 return ret; 267 } 268 269 /** get mmap offset */ 270 static uint64_t mmap_offset(struct drm_gem_object *obj) 271 { 272 struct drm_device *dev = obj->dev; 273 int ret; 274 275 GEM_WARN_ON(!msm_gem_is_locked(obj)); 276 277 /* Make it mmapable */ 278 ret = drm_gem_create_mmap_offset(obj); 279 280 if (ret) { 281 DRM_DEV_ERROR(dev->dev, "could not allocate mmap offset\n"); 282 return 0; 283 } 284 285 return drm_vma_node_offset_addr(&obj->vma_node); 286 } 287 288 uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 289 { 290 uint64_t offset; 291 292 msm_gem_lock(obj); 293 offset = mmap_offset(obj); 294 msm_gem_unlock(obj); 295 return offset; 296 } 297 298 static struct msm_gem_vma *add_vma(struct drm_gem_object *obj, 299 struct msm_gem_address_space *aspace) 300 { 301 struct msm_gem_object *msm_obj = to_msm_bo(obj); 302 struct msm_gem_vma *vma; 303 304 GEM_WARN_ON(!msm_gem_is_locked(obj)); 305 306 vma = kzalloc(sizeof(*vma), GFP_KERNEL); 307 if (!vma) 308 return ERR_PTR(-ENOMEM); 309 310 vma->aspace = aspace; 311 312 list_add_tail(&vma->list, &msm_obj->vmas); 313 314 return vma; 315 } 316 317 static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj, 318 struct msm_gem_address_space *aspace) 319 { 320 struct msm_gem_object *msm_obj = to_msm_bo(obj); 321 struct msm_gem_vma *vma; 322 323 GEM_WARN_ON(!msm_gem_is_locked(obj)); 324 325 list_for_each_entry(vma, &msm_obj->vmas, list) { 326 if (vma->aspace == aspace) 327 return vma; 328 } 329 330 return NULL; 331 } 332 333 static void del_vma(struct msm_gem_vma *vma) 334 { 335 if (!vma) 336 return; 337 338 list_del(&vma->list); 339 kfree(vma); 340 } 341 342 /* 343 * If close is true, this also closes the VMA (releasing the allocated 344 * iova range) in addition to removing the iommu mapping. In the eviction 345 * case (!close), we keep the iova allocated, but only remove the iommu 346 * mapping. 347 */ 348 static void 349 put_iova_spaces(struct drm_gem_object *obj, bool close) 350 { 351 struct msm_gem_object *msm_obj = to_msm_bo(obj); 352 struct msm_gem_vma *vma; 353 354 GEM_WARN_ON(!msm_gem_is_locked(obj)); 355 356 list_for_each_entry(vma, &msm_obj->vmas, list) { 357 if (vma->aspace) { 358 msm_gem_purge_vma(vma->aspace, vma); 359 if (close) 360 msm_gem_close_vma(vma->aspace, vma); 361 } 362 } 363 } 364 365 /* Called with msm_obj locked */ 366 static void 367 put_iova_vmas(struct drm_gem_object *obj) 368 { 369 struct msm_gem_object *msm_obj = to_msm_bo(obj); 370 struct msm_gem_vma *vma, *tmp; 371 372 GEM_WARN_ON(!msm_gem_is_locked(obj)); 373 374 list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) { 375 del_vma(vma); 376 } 377 } 378 379 static int get_iova_locked(struct drm_gem_object *obj, 380 struct msm_gem_address_space *aspace, uint64_t *iova, 381 u64 range_start, u64 range_end) 382 { 383 struct msm_gem_vma *vma; 384 int ret = 0; 385 386 GEM_WARN_ON(!msm_gem_is_locked(obj)); 387 388 vma = lookup_vma(obj, aspace); 389 390 if (!vma) { 391 vma = add_vma(obj, aspace); 392 if (IS_ERR(vma)) 393 return PTR_ERR(vma); 394 395 ret = msm_gem_init_vma(aspace, vma, obj->size, 396 range_start, range_end); 397 if (ret) { 398 del_vma(vma); 399 return ret; 400 } 401 } 402 403 *iova = vma->iova; 404 return 0; 405 } 406 407 static int msm_gem_pin_iova(struct drm_gem_object *obj, 408 struct msm_gem_address_space *aspace) 409 { 410 struct msm_gem_object *msm_obj = to_msm_bo(obj); 411 struct msm_gem_vma *vma; 412 struct page **pages; 413 int ret, prot = IOMMU_READ; 414 415 if (!(msm_obj->flags & MSM_BO_GPU_READONLY)) 416 prot |= IOMMU_WRITE; 417 418 if (msm_obj->flags & MSM_BO_MAP_PRIV) 419 prot |= IOMMU_PRIV; 420 421 if (msm_obj->flags & MSM_BO_CACHED_COHERENT) 422 prot |= IOMMU_CACHE; 423 424 GEM_WARN_ON(!msm_gem_is_locked(obj)); 425 426 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) 427 return -EBUSY; 428 429 vma = lookup_vma(obj, aspace); 430 if (GEM_WARN_ON(!vma)) 431 return -EINVAL; 432 433 pages = get_pages(obj); 434 if (IS_ERR(pages)) 435 return PTR_ERR(pages); 436 437 ret = msm_gem_map_vma(aspace, vma, prot, msm_obj->sgt, obj->size); 438 439 if (!ret) 440 msm_obj->pin_count++; 441 442 return ret; 443 } 444 445 static int get_and_pin_iova_range_locked(struct drm_gem_object *obj, 446 struct msm_gem_address_space *aspace, uint64_t *iova, 447 u64 range_start, u64 range_end) 448 { 449 u64 local; 450 int ret; 451 452 GEM_WARN_ON(!msm_gem_is_locked(obj)); 453 454 ret = get_iova_locked(obj, aspace, &local, 455 range_start, range_end); 456 457 if (!ret) 458 ret = msm_gem_pin_iova(obj, aspace); 459 460 if (!ret) 461 *iova = local; 462 463 return ret; 464 } 465 466 /* 467 * get iova and pin it. Should have a matching put 468 * limits iova to specified range (in pages) 469 */ 470 int msm_gem_get_and_pin_iova_range(struct drm_gem_object *obj, 471 struct msm_gem_address_space *aspace, uint64_t *iova, 472 u64 range_start, u64 range_end) 473 { 474 int ret; 475 476 msm_gem_lock(obj); 477 ret = get_and_pin_iova_range_locked(obj, aspace, iova, range_start, range_end); 478 msm_gem_unlock(obj); 479 480 return ret; 481 } 482 483 int msm_gem_get_and_pin_iova_locked(struct drm_gem_object *obj, 484 struct msm_gem_address_space *aspace, uint64_t *iova) 485 { 486 return get_and_pin_iova_range_locked(obj, aspace, iova, 0, U64_MAX); 487 } 488 489 /* get iova and pin it. Should have a matching put */ 490 int msm_gem_get_and_pin_iova(struct drm_gem_object *obj, 491 struct msm_gem_address_space *aspace, uint64_t *iova) 492 { 493 return msm_gem_get_and_pin_iova_range(obj, aspace, iova, 0, U64_MAX); 494 } 495 496 /* 497 * Get an iova but don't pin it. Doesn't need a put because iovas are currently 498 * valid for the life of the object 499 */ 500 int msm_gem_get_iova(struct drm_gem_object *obj, 501 struct msm_gem_address_space *aspace, uint64_t *iova) 502 { 503 int ret; 504 505 msm_gem_lock(obj); 506 ret = get_iova_locked(obj, aspace, iova, 0, U64_MAX); 507 msm_gem_unlock(obj); 508 509 return ret; 510 } 511 512 /* get iova without taking a reference, used in places where you have 513 * already done a 'msm_gem_get_and_pin_iova' or 'msm_gem_get_iova' 514 */ 515 uint64_t msm_gem_iova(struct drm_gem_object *obj, 516 struct msm_gem_address_space *aspace) 517 { 518 struct msm_gem_vma *vma; 519 520 msm_gem_lock(obj); 521 vma = lookup_vma(obj, aspace); 522 msm_gem_unlock(obj); 523 GEM_WARN_ON(!vma); 524 525 return vma ? vma->iova : 0; 526 } 527 528 /* 529 * Locked variant of msm_gem_unpin_iova() 530 */ 531 void msm_gem_unpin_iova_locked(struct drm_gem_object *obj, 532 struct msm_gem_address_space *aspace) 533 { 534 struct msm_gem_object *msm_obj = to_msm_bo(obj); 535 struct msm_gem_vma *vma; 536 537 GEM_WARN_ON(!msm_gem_is_locked(obj)); 538 539 vma = lookup_vma(obj, aspace); 540 541 if (!GEM_WARN_ON(!vma)) { 542 msm_gem_unmap_vma(aspace, vma); 543 544 msm_obj->pin_count--; 545 GEM_WARN_ON(msm_obj->pin_count < 0); 546 547 update_inactive(msm_obj); 548 } 549 } 550 551 /* 552 * Unpin a iova by updating the reference counts. The memory isn't actually 553 * purged until something else (shrinker, mm_notifier, destroy, etc) decides 554 * to get rid of it 555 */ 556 void msm_gem_unpin_iova(struct drm_gem_object *obj, 557 struct msm_gem_address_space *aspace) 558 { 559 msm_gem_lock(obj); 560 msm_gem_unpin_iova_locked(obj, aspace); 561 msm_gem_unlock(obj); 562 } 563 564 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 565 struct drm_mode_create_dumb *args) 566 { 567 args->pitch = align_pitch(args->width, args->bpp); 568 args->size = PAGE_ALIGN(args->pitch * args->height); 569 return msm_gem_new_handle(dev, file, args->size, 570 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle, "dumb"); 571 } 572 573 int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 574 uint32_t handle, uint64_t *offset) 575 { 576 struct drm_gem_object *obj; 577 int ret = 0; 578 579 /* GEM does all our handle to object mapping */ 580 obj = drm_gem_object_lookup(file, handle); 581 if (obj == NULL) { 582 ret = -ENOENT; 583 goto fail; 584 } 585 586 *offset = msm_gem_mmap_offset(obj); 587 588 drm_gem_object_put(obj); 589 590 fail: 591 return ret; 592 } 593 594 static void *get_vaddr(struct drm_gem_object *obj, unsigned madv) 595 { 596 struct msm_gem_object *msm_obj = to_msm_bo(obj); 597 int ret = 0; 598 599 GEM_WARN_ON(!msm_gem_is_locked(obj)); 600 601 if (obj->import_attach) 602 return ERR_PTR(-ENODEV); 603 604 if (GEM_WARN_ON(msm_obj->madv > madv)) { 605 DRM_DEV_ERROR(obj->dev->dev, "Invalid madv state: %u vs %u\n", 606 msm_obj->madv, madv); 607 return ERR_PTR(-EBUSY); 608 } 609 610 /* increment vmap_count *before* vmap() call, so shrinker can 611 * check vmap_count (is_vunmapable()) outside of msm_obj lock. 612 * This guarantees that we won't try to msm_gem_vunmap() this 613 * same object from within the vmap() call (while we already 614 * hold msm_obj lock) 615 */ 616 msm_obj->vmap_count++; 617 618 if (!msm_obj->vaddr) { 619 struct page **pages = get_pages(obj); 620 if (IS_ERR(pages)) { 621 ret = PTR_ERR(pages); 622 goto fail; 623 } 624 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 625 VM_MAP, msm_gem_pgprot(msm_obj, PAGE_KERNEL)); 626 if (msm_obj->vaddr == NULL) { 627 ret = -ENOMEM; 628 goto fail; 629 } 630 631 update_inactive(msm_obj); 632 } 633 634 return msm_obj->vaddr; 635 636 fail: 637 msm_obj->vmap_count--; 638 return ERR_PTR(ret); 639 } 640 641 void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) 642 { 643 return get_vaddr(obj, MSM_MADV_WILLNEED); 644 } 645 646 void *msm_gem_get_vaddr(struct drm_gem_object *obj) 647 { 648 void *ret; 649 650 msm_gem_lock(obj); 651 ret = msm_gem_get_vaddr_locked(obj); 652 msm_gem_unlock(obj); 653 654 return ret; 655 } 656 657 /* 658 * Don't use this! It is for the very special case of dumping 659 * submits from GPU hangs or faults, were the bo may already 660 * be MSM_MADV_DONTNEED, but we know the buffer is still on the 661 * active list. 662 */ 663 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj) 664 { 665 return get_vaddr(obj, __MSM_MADV_PURGED); 666 } 667 668 void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) 669 { 670 struct msm_gem_object *msm_obj = to_msm_bo(obj); 671 672 GEM_WARN_ON(!msm_gem_is_locked(obj)); 673 GEM_WARN_ON(msm_obj->vmap_count < 1); 674 675 msm_obj->vmap_count--; 676 } 677 678 void msm_gem_put_vaddr(struct drm_gem_object *obj) 679 { 680 msm_gem_lock(obj); 681 msm_gem_put_vaddr_locked(obj); 682 msm_gem_unlock(obj); 683 } 684 685 /* Update madvise status, returns true if not purged, else 686 * false or -errno. 687 */ 688 int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) 689 { 690 struct msm_gem_object *msm_obj = to_msm_bo(obj); 691 692 msm_gem_lock(obj); 693 694 if (msm_obj->madv != __MSM_MADV_PURGED) 695 msm_obj->madv = madv; 696 697 madv = msm_obj->madv; 698 699 /* If the obj is inactive, we might need to move it 700 * between inactive lists 701 */ 702 if (msm_obj->active_count == 0) 703 update_inactive(msm_obj); 704 705 msm_gem_unlock(obj); 706 707 return (madv != __MSM_MADV_PURGED); 708 } 709 710 void msm_gem_purge(struct drm_gem_object *obj) 711 { 712 struct drm_device *dev = obj->dev; 713 struct msm_gem_object *msm_obj = to_msm_bo(obj); 714 715 GEM_WARN_ON(!msm_gem_is_locked(obj)); 716 GEM_WARN_ON(!is_purgeable(msm_obj)); 717 718 /* Get rid of any iommu mapping(s): */ 719 put_iova_spaces(obj, true); 720 721 msm_gem_vunmap(obj); 722 723 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 724 725 put_pages(obj); 726 727 put_iova_vmas(obj); 728 729 msm_obj->madv = __MSM_MADV_PURGED; 730 update_inactive(msm_obj); 731 732 drm_gem_free_mmap_offset(obj); 733 734 /* Our goal here is to return as much of the memory as 735 * is possible back to the system as we are called from OOM. 736 * To do this we must instruct the shmfs to drop all of its 737 * backing pages, *now*. 738 */ 739 shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); 740 741 invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 742 0, (loff_t)-1); 743 } 744 745 /* 746 * Unpin the backing pages and make them available to be swapped out. 747 */ 748 void msm_gem_evict(struct drm_gem_object *obj) 749 { 750 struct drm_device *dev = obj->dev; 751 struct msm_gem_object *msm_obj = to_msm_bo(obj); 752 753 GEM_WARN_ON(!msm_gem_is_locked(obj)); 754 GEM_WARN_ON(is_unevictable(msm_obj)); 755 GEM_WARN_ON(!msm_obj->evictable); 756 GEM_WARN_ON(msm_obj->active_count); 757 758 /* Get rid of any iommu mapping(s): */ 759 put_iova_spaces(obj, false); 760 761 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 762 763 put_pages(obj); 764 765 update_inactive(msm_obj); 766 } 767 768 void msm_gem_vunmap(struct drm_gem_object *obj) 769 { 770 struct msm_gem_object *msm_obj = to_msm_bo(obj); 771 772 GEM_WARN_ON(!msm_gem_is_locked(obj)); 773 774 if (!msm_obj->vaddr || GEM_WARN_ON(!is_vunmapable(msm_obj))) 775 return; 776 777 vunmap(msm_obj->vaddr); 778 msm_obj->vaddr = NULL; 779 } 780 781 void msm_gem_active_get(struct drm_gem_object *obj, struct msm_gpu *gpu) 782 { 783 struct msm_gem_object *msm_obj = to_msm_bo(obj); 784 struct msm_drm_private *priv = obj->dev->dev_private; 785 786 might_sleep(); 787 GEM_WARN_ON(!msm_gem_is_locked(obj)); 788 GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); 789 GEM_WARN_ON(msm_obj->dontneed); 790 791 if (msm_obj->active_count++ == 0) { 792 mutex_lock(&priv->mm_lock); 793 if (msm_obj->evictable) 794 mark_unevictable(msm_obj); 795 list_move_tail(&msm_obj->mm_list, &gpu->active_list); 796 mutex_unlock(&priv->mm_lock); 797 } 798 } 799 800 void msm_gem_active_put(struct drm_gem_object *obj) 801 { 802 struct msm_gem_object *msm_obj = to_msm_bo(obj); 803 804 might_sleep(); 805 GEM_WARN_ON(!msm_gem_is_locked(obj)); 806 807 if (--msm_obj->active_count == 0) { 808 update_inactive(msm_obj); 809 } 810 } 811 812 static void update_inactive(struct msm_gem_object *msm_obj) 813 { 814 struct msm_drm_private *priv = msm_obj->base.dev->dev_private; 815 816 GEM_WARN_ON(!msm_gem_is_locked(&msm_obj->base)); 817 818 if (msm_obj->active_count != 0) 819 return; 820 821 mutex_lock(&priv->mm_lock); 822 823 if (msm_obj->dontneed) 824 mark_unpurgeable(msm_obj); 825 if (msm_obj->evictable) 826 mark_unevictable(msm_obj); 827 828 list_del(&msm_obj->mm_list); 829 if ((msm_obj->madv == MSM_MADV_WILLNEED) && msm_obj->sgt) { 830 list_add_tail(&msm_obj->mm_list, &priv->inactive_willneed); 831 mark_evictable(msm_obj); 832 } else if (msm_obj->madv == MSM_MADV_DONTNEED) { 833 list_add_tail(&msm_obj->mm_list, &priv->inactive_dontneed); 834 mark_purgeable(msm_obj); 835 } else { 836 GEM_WARN_ON((msm_obj->madv != __MSM_MADV_PURGED) && msm_obj->sgt); 837 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); 838 } 839 840 mutex_unlock(&priv->mm_lock); 841 } 842 843 int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 844 { 845 bool write = !!(op & MSM_PREP_WRITE); 846 unsigned long remain = 847 op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); 848 long ret; 849 850 ret = dma_resv_wait_timeout(obj->resv, write, true, remain); 851 if (ret == 0) 852 return remain == 0 ? -EBUSY : -ETIMEDOUT; 853 else if (ret < 0) 854 return ret; 855 856 /* TODO cache maintenance */ 857 858 return 0; 859 } 860 861 int msm_gem_cpu_fini(struct drm_gem_object *obj) 862 { 863 /* TODO cache maintenance */ 864 return 0; 865 } 866 867 #ifdef CONFIG_DEBUG_FS 868 void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m, 869 struct msm_gem_stats *stats) 870 { 871 struct msm_gem_object *msm_obj = to_msm_bo(obj); 872 struct dma_resv *robj = obj->resv; 873 struct msm_gem_vma *vma; 874 uint64_t off = drm_vma_node_start(&obj->vma_node); 875 const char *madv; 876 877 msm_gem_lock(obj); 878 879 stats->all.count++; 880 stats->all.size += obj->size; 881 882 if (is_active(msm_obj)) { 883 stats->active.count++; 884 stats->active.size += obj->size; 885 } 886 887 if (msm_obj->pages) { 888 stats->resident.count++; 889 stats->resident.size += obj->size; 890 } 891 892 switch (msm_obj->madv) { 893 case __MSM_MADV_PURGED: 894 stats->purged.count++; 895 stats->purged.size += obj->size; 896 madv = " purged"; 897 break; 898 case MSM_MADV_DONTNEED: 899 stats->purgeable.count++; 900 stats->purgeable.size += obj->size; 901 madv = " purgeable"; 902 break; 903 case MSM_MADV_WILLNEED: 904 default: 905 madv = ""; 906 break; 907 } 908 909 seq_printf(m, "%08x: %c %2d (%2d) %08llx %p", 910 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 911 obj->name, kref_read(&obj->refcount), 912 off, msm_obj->vaddr); 913 914 seq_printf(m, " %08zu %9s %-32s\n", obj->size, madv, msm_obj->name); 915 916 if (!list_empty(&msm_obj->vmas)) { 917 918 seq_puts(m, " vmas:"); 919 920 list_for_each_entry(vma, &msm_obj->vmas, list) { 921 const char *name, *comm; 922 if (vma->aspace) { 923 struct msm_gem_address_space *aspace = vma->aspace; 924 struct task_struct *task = 925 get_pid_task(aspace->pid, PIDTYPE_PID); 926 if (task) { 927 comm = kstrdup(task->comm, GFP_KERNEL); 928 } else { 929 comm = NULL; 930 } 931 name = aspace->name; 932 } else { 933 name = comm = NULL; 934 } 935 seq_printf(m, " [%s%s%s: aspace=%p, %08llx,%s,inuse=%d]", 936 name, comm ? ":" : "", comm ? comm : "", 937 vma->aspace, vma->iova, 938 vma->mapped ? "mapped" : "unmapped", 939 msm_gem_vma_inuse(vma)); 940 kfree(comm); 941 } 942 943 seq_puts(m, "\n"); 944 } 945 946 dma_resv_describe(robj, m); 947 msm_gem_unlock(obj); 948 } 949 950 void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 951 { 952 struct msm_gem_stats stats = {}; 953 struct msm_gem_object *msm_obj; 954 955 seq_puts(m, " flags id ref offset kaddr size madv name\n"); 956 list_for_each_entry(msm_obj, list, node) { 957 struct drm_gem_object *obj = &msm_obj->base; 958 seq_puts(m, " "); 959 msm_gem_describe(obj, m, &stats); 960 } 961 962 seq_printf(m, "Total: %4d objects, %9zu bytes\n", 963 stats.all.count, stats.all.size); 964 seq_printf(m, "Active: %4d objects, %9zu bytes\n", 965 stats.active.count, stats.active.size); 966 seq_printf(m, "Resident: %4d objects, %9zu bytes\n", 967 stats.resident.count, stats.resident.size); 968 seq_printf(m, "Purgeable: %4d objects, %9zu bytes\n", 969 stats.purgeable.count, stats.purgeable.size); 970 seq_printf(m, "Purged: %4d objects, %9zu bytes\n", 971 stats.purged.count, stats.purged.size); 972 } 973 #endif 974 975 /* don't call directly! Use drm_gem_object_put() */ 976 void msm_gem_free_object(struct drm_gem_object *obj) 977 { 978 struct msm_gem_object *msm_obj = to_msm_bo(obj); 979 struct drm_device *dev = obj->dev; 980 struct msm_drm_private *priv = dev->dev_private; 981 982 mutex_lock(&priv->obj_lock); 983 list_del(&msm_obj->node); 984 mutex_unlock(&priv->obj_lock); 985 986 mutex_lock(&priv->mm_lock); 987 if (msm_obj->dontneed) 988 mark_unpurgeable(msm_obj); 989 list_del(&msm_obj->mm_list); 990 mutex_unlock(&priv->mm_lock); 991 992 msm_gem_lock(obj); 993 994 /* object should not be on active list: */ 995 GEM_WARN_ON(is_active(msm_obj)); 996 997 put_iova_spaces(obj, true); 998 999 if (obj->import_attach) { 1000 GEM_WARN_ON(msm_obj->vaddr); 1001 1002 /* Don't drop the pages for imported dmabuf, as they are not 1003 * ours, just free the array we allocated: 1004 */ 1005 kvfree(msm_obj->pages); 1006 1007 put_iova_vmas(obj); 1008 1009 /* dma_buf_detach() grabs resv lock, so we need to unlock 1010 * prior to drm_prime_gem_destroy 1011 */ 1012 msm_gem_unlock(obj); 1013 1014 drm_prime_gem_destroy(obj, msm_obj->sgt); 1015 } else { 1016 msm_gem_vunmap(obj); 1017 put_pages(obj); 1018 put_iova_vmas(obj); 1019 msm_gem_unlock(obj); 1020 } 1021 1022 drm_gem_object_release(obj); 1023 1024 kfree(msm_obj); 1025 } 1026 1027 static int msm_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) 1028 { 1029 struct msm_gem_object *msm_obj = to_msm_bo(obj); 1030 1031 vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP; 1032 vma->vm_page_prot = msm_gem_pgprot(msm_obj, vm_get_page_prot(vma->vm_flags)); 1033 1034 return 0; 1035 } 1036 1037 /* convenience method to construct a GEM buffer object, and userspace handle */ 1038 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 1039 uint32_t size, uint32_t flags, uint32_t *handle, 1040 char *name) 1041 { 1042 struct drm_gem_object *obj; 1043 int ret; 1044 1045 obj = msm_gem_new(dev, size, flags); 1046 1047 if (IS_ERR(obj)) 1048 return PTR_ERR(obj); 1049 1050 if (name) 1051 msm_gem_object_set_name(obj, "%s", name); 1052 1053 ret = drm_gem_handle_create(file, obj, handle); 1054 1055 /* drop reference from allocate - handle holds it now */ 1056 drm_gem_object_put(obj); 1057 1058 return ret; 1059 } 1060 1061 static const struct vm_operations_struct vm_ops = { 1062 .fault = msm_gem_fault, 1063 .open = drm_gem_vm_open, 1064 .close = drm_gem_vm_close, 1065 }; 1066 1067 static const struct drm_gem_object_funcs msm_gem_object_funcs = { 1068 .free = msm_gem_free_object, 1069 .pin = msm_gem_prime_pin, 1070 .unpin = msm_gem_prime_unpin, 1071 .get_sg_table = msm_gem_prime_get_sg_table, 1072 .vmap = msm_gem_prime_vmap, 1073 .vunmap = msm_gem_prime_vunmap, 1074 .mmap = msm_gem_object_mmap, 1075 .vm_ops = &vm_ops, 1076 }; 1077 1078 static int msm_gem_new_impl(struct drm_device *dev, 1079 uint32_t size, uint32_t flags, 1080 struct drm_gem_object **obj) 1081 { 1082 struct msm_drm_private *priv = dev->dev_private; 1083 struct msm_gem_object *msm_obj; 1084 1085 switch (flags & MSM_BO_CACHE_MASK) { 1086 case MSM_BO_UNCACHED: 1087 case MSM_BO_CACHED: 1088 case MSM_BO_WC: 1089 break; 1090 case MSM_BO_CACHED_COHERENT: 1091 if (priv->has_cached_coherent) 1092 break; 1093 fallthrough; 1094 default: 1095 DRM_DEV_DEBUG(dev->dev, "invalid cache flag: %x\n", 1096 (flags & MSM_BO_CACHE_MASK)); 1097 return -EINVAL; 1098 } 1099 1100 msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 1101 if (!msm_obj) 1102 return -ENOMEM; 1103 1104 msm_obj->flags = flags; 1105 msm_obj->madv = MSM_MADV_WILLNEED; 1106 1107 INIT_LIST_HEAD(&msm_obj->node); 1108 INIT_LIST_HEAD(&msm_obj->vmas); 1109 1110 *obj = &msm_obj->base; 1111 (*obj)->funcs = &msm_gem_object_funcs; 1112 1113 return 0; 1114 } 1115 1116 struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32_t flags) 1117 { 1118 struct msm_drm_private *priv = dev->dev_private; 1119 struct msm_gem_object *msm_obj; 1120 struct drm_gem_object *obj = NULL; 1121 bool use_vram = false; 1122 int ret; 1123 1124 size = PAGE_ALIGN(size); 1125 1126 if (!msm_use_mmu(dev)) 1127 use_vram = true; 1128 else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && priv->vram.size) 1129 use_vram = true; 1130 1131 if (GEM_WARN_ON(use_vram && !priv->vram.size)) 1132 return ERR_PTR(-EINVAL); 1133 1134 /* Disallow zero sized objects as they make the underlying 1135 * infrastructure grumpy 1136 */ 1137 if (size == 0) 1138 return ERR_PTR(-EINVAL); 1139 1140 ret = msm_gem_new_impl(dev, size, flags, &obj); 1141 if (ret) 1142 return ERR_PTR(ret); 1143 1144 msm_obj = to_msm_bo(obj); 1145 1146 if (use_vram) { 1147 struct msm_gem_vma *vma; 1148 struct page **pages; 1149 1150 drm_gem_private_object_init(dev, obj, size); 1151 1152 msm_gem_lock(obj); 1153 1154 vma = add_vma(obj, NULL); 1155 msm_gem_unlock(obj); 1156 if (IS_ERR(vma)) { 1157 ret = PTR_ERR(vma); 1158 goto fail; 1159 } 1160 1161 to_msm_bo(obj)->vram_node = &vma->node; 1162 1163 /* Call chain get_pages() -> update_inactive() tries to 1164 * access msm_obj->mm_list, but it is not initialized yet. 1165 * To avoid NULL pointer dereference error, initialize 1166 * mm_list to be empty. 1167 */ 1168 INIT_LIST_HEAD(&msm_obj->mm_list); 1169 1170 msm_gem_lock(obj); 1171 pages = get_pages(obj); 1172 msm_gem_unlock(obj); 1173 if (IS_ERR(pages)) { 1174 ret = PTR_ERR(pages); 1175 goto fail; 1176 } 1177 1178 vma->iova = physaddr(obj); 1179 } else { 1180 ret = drm_gem_object_init(dev, obj, size); 1181 if (ret) 1182 goto fail; 1183 /* 1184 * Our buffers are kept pinned, so allocating them from the 1185 * MOVABLE zone is a really bad idea, and conflicts with CMA. 1186 * See comments above new_inode() why this is required _and_ 1187 * expected if you're going to pin these pages. 1188 */ 1189 mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER); 1190 } 1191 1192 mutex_lock(&priv->mm_lock); 1193 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); 1194 mutex_unlock(&priv->mm_lock); 1195 1196 mutex_lock(&priv->obj_lock); 1197 list_add_tail(&msm_obj->node, &priv->objects); 1198 mutex_unlock(&priv->obj_lock); 1199 1200 return obj; 1201 1202 fail: 1203 drm_gem_object_put(obj); 1204 return ERR_PTR(ret); 1205 } 1206 1207 struct drm_gem_object *msm_gem_import(struct drm_device *dev, 1208 struct dma_buf *dmabuf, struct sg_table *sgt) 1209 { 1210 struct msm_drm_private *priv = dev->dev_private; 1211 struct msm_gem_object *msm_obj; 1212 struct drm_gem_object *obj; 1213 uint32_t size; 1214 int ret, npages; 1215 1216 /* if we don't have IOMMU, don't bother pretending we can import: */ 1217 if (!msm_use_mmu(dev)) { 1218 DRM_DEV_ERROR(dev->dev, "cannot import without IOMMU\n"); 1219 return ERR_PTR(-EINVAL); 1220 } 1221 1222 size = PAGE_ALIGN(dmabuf->size); 1223 1224 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); 1225 if (ret) 1226 return ERR_PTR(ret); 1227 1228 drm_gem_private_object_init(dev, obj, size); 1229 1230 npages = size / PAGE_SIZE; 1231 1232 msm_obj = to_msm_bo(obj); 1233 msm_gem_lock(obj); 1234 msm_obj->sgt = sgt; 1235 msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 1236 if (!msm_obj->pages) { 1237 msm_gem_unlock(obj); 1238 ret = -ENOMEM; 1239 goto fail; 1240 } 1241 1242 ret = drm_prime_sg_to_page_array(sgt, msm_obj->pages, npages); 1243 if (ret) { 1244 msm_gem_unlock(obj); 1245 goto fail; 1246 } 1247 1248 msm_gem_unlock(obj); 1249 1250 mutex_lock(&priv->mm_lock); 1251 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); 1252 mutex_unlock(&priv->mm_lock); 1253 1254 mutex_lock(&priv->obj_lock); 1255 list_add_tail(&msm_obj->node, &priv->objects); 1256 mutex_unlock(&priv->obj_lock); 1257 1258 return obj; 1259 1260 fail: 1261 drm_gem_object_put(obj); 1262 return ERR_PTR(ret); 1263 } 1264 1265 void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size, 1266 uint32_t flags, struct msm_gem_address_space *aspace, 1267 struct drm_gem_object **bo, uint64_t *iova) 1268 { 1269 void *vaddr; 1270 struct drm_gem_object *obj = msm_gem_new(dev, size, flags); 1271 int ret; 1272 1273 if (IS_ERR(obj)) 1274 return ERR_CAST(obj); 1275 1276 if (iova) { 1277 ret = msm_gem_get_and_pin_iova(obj, aspace, iova); 1278 if (ret) 1279 goto err; 1280 } 1281 1282 vaddr = msm_gem_get_vaddr(obj); 1283 if (IS_ERR(vaddr)) { 1284 msm_gem_unpin_iova(obj, aspace); 1285 ret = PTR_ERR(vaddr); 1286 goto err; 1287 } 1288 1289 if (bo) 1290 *bo = obj; 1291 1292 return vaddr; 1293 err: 1294 drm_gem_object_put(obj); 1295 1296 return ERR_PTR(ret); 1297 1298 } 1299 1300 void msm_gem_kernel_put(struct drm_gem_object *bo, 1301 struct msm_gem_address_space *aspace) 1302 { 1303 if (IS_ERR_OR_NULL(bo)) 1304 return; 1305 1306 msm_gem_put_vaddr(bo); 1307 msm_gem_unpin_iova(bo, aspace); 1308 drm_gem_object_put(bo); 1309 } 1310 1311 void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...) 1312 { 1313 struct msm_gem_object *msm_obj = to_msm_bo(bo); 1314 va_list ap; 1315 1316 if (!fmt) 1317 return; 1318 1319 va_start(ap, fmt); 1320 vsnprintf(msm_obj->name, sizeof(msm_obj->name), fmt, ap); 1321 va_end(ap); 1322 } 1323