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/spinlock.h> 9 #include <linux/shmem_fs.h> 10 #include <linux/dma-buf.h> 11 #include <linux/pfn_t.h> 12 13 #include <drm/drm_prime.h> 14 15 #include "msm_drv.h" 16 #include "msm_fence.h" 17 #include "msm_gem.h" 18 #include "msm_gpu.h" 19 #include "msm_mmu.h" 20 21 static void update_inactive(struct msm_gem_object *msm_obj); 22 23 static dma_addr_t physaddr(struct drm_gem_object *obj) 24 { 25 struct msm_gem_object *msm_obj = to_msm_bo(obj); 26 struct msm_drm_private *priv = obj->dev->dev_private; 27 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + 28 priv->vram.paddr; 29 } 30 31 static bool use_pages(struct drm_gem_object *obj) 32 { 33 struct msm_gem_object *msm_obj = to_msm_bo(obj); 34 return !msm_obj->vram_node; 35 } 36 37 /* 38 * Cache sync.. this is a bit over-complicated, to fit dma-mapping 39 * API. Really GPU cache is out of scope here (handled on cmdstream) 40 * and all we need to do is invalidate newly allocated pages before 41 * mapping to CPU as uncached/writecombine. 42 * 43 * On top of this, we have the added headache, that depending on 44 * display generation, the display's iommu may be wired up to either 45 * the toplevel drm device (mdss), or to the mdp sub-node, meaning 46 * that here we either have dma-direct or iommu ops. 47 * 48 * Let this be a cautionary tail of abstraction gone wrong. 49 */ 50 51 static void sync_for_device(struct msm_gem_object *msm_obj) 52 { 53 struct device *dev = msm_obj->base.dev->dev; 54 55 dma_map_sgtable(dev, msm_obj->sgt, DMA_BIDIRECTIONAL, 0); 56 } 57 58 static void sync_for_cpu(struct msm_gem_object *msm_obj) 59 { 60 struct device *dev = msm_obj->base.dev->dev; 61 62 dma_unmap_sgtable(dev, msm_obj->sgt, DMA_BIDIRECTIONAL, 0); 63 } 64 65 /* allocate pages from VRAM carveout, used when no IOMMU: */ 66 static struct page **get_pages_vram(struct drm_gem_object *obj, int npages) 67 { 68 struct msm_gem_object *msm_obj = to_msm_bo(obj); 69 struct msm_drm_private *priv = obj->dev->dev_private; 70 dma_addr_t paddr; 71 struct page **p; 72 int ret, i; 73 74 p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 75 if (!p) 76 return ERR_PTR(-ENOMEM); 77 78 spin_lock(&priv->vram.lock); 79 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages); 80 spin_unlock(&priv->vram.lock); 81 if (ret) { 82 kvfree(p); 83 return ERR_PTR(ret); 84 } 85 86 paddr = physaddr(obj); 87 for (i = 0; i < npages; i++) { 88 p[i] = phys_to_page(paddr); 89 paddr += PAGE_SIZE; 90 } 91 92 return p; 93 } 94 95 static struct page **get_pages(struct drm_gem_object *obj) 96 { 97 struct msm_gem_object *msm_obj = to_msm_bo(obj); 98 99 GEM_WARN_ON(!msm_gem_is_locked(obj)); 100 101 if (!msm_obj->pages) { 102 struct drm_device *dev = obj->dev; 103 struct page **p; 104 int npages = obj->size >> PAGE_SHIFT; 105 106 if (use_pages(obj)) 107 p = drm_gem_get_pages(obj); 108 else 109 p = get_pages_vram(obj, npages); 110 111 if (IS_ERR(p)) { 112 DRM_DEV_ERROR(dev->dev, "could not get pages: %ld\n", 113 PTR_ERR(p)); 114 return p; 115 } 116 117 msm_obj->pages = p; 118 119 msm_obj->sgt = drm_prime_pages_to_sg(obj->dev, p, npages); 120 if (IS_ERR(msm_obj->sgt)) { 121 void *ptr = ERR_CAST(msm_obj->sgt); 122 123 DRM_DEV_ERROR(dev->dev, "failed to allocate sgt\n"); 124 msm_obj->sgt = NULL; 125 return ptr; 126 } 127 128 /* For non-cached buffers, ensure the new pages are clean 129 * because display controller, GPU, etc. are not coherent: 130 */ 131 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 132 sync_for_device(msm_obj); 133 } 134 135 return msm_obj->pages; 136 } 137 138 static void put_pages_vram(struct drm_gem_object *obj) 139 { 140 struct msm_gem_object *msm_obj = to_msm_bo(obj); 141 struct msm_drm_private *priv = obj->dev->dev_private; 142 143 spin_lock(&priv->vram.lock); 144 drm_mm_remove_node(msm_obj->vram_node); 145 spin_unlock(&priv->vram.lock); 146 147 kvfree(msm_obj->pages); 148 } 149 150 static void put_pages(struct drm_gem_object *obj) 151 { 152 struct msm_gem_object *msm_obj = to_msm_bo(obj); 153 154 if (msm_obj->pages) { 155 if (msm_obj->sgt) { 156 /* For non-cached buffers, ensure the new 157 * pages are clean because display controller, 158 * GPU, etc. are not coherent: 159 */ 160 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 161 sync_for_cpu(msm_obj); 162 163 sg_free_table(msm_obj->sgt); 164 kfree(msm_obj->sgt); 165 msm_obj->sgt = NULL; 166 } 167 168 if (use_pages(obj)) 169 drm_gem_put_pages(obj, msm_obj->pages, true, false); 170 else 171 put_pages_vram(obj); 172 173 msm_obj->pages = NULL; 174 } 175 } 176 177 struct page **msm_gem_get_pages(struct drm_gem_object *obj) 178 { 179 struct msm_gem_object *msm_obj = to_msm_bo(obj); 180 struct page **p; 181 182 msm_gem_lock(obj); 183 184 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 185 msm_gem_unlock(obj); 186 return ERR_PTR(-EBUSY); 187 } 188 189 p = get_pages(obj); 190 msm_gem_unlock(obj); 191 return p; 192 } 193 194 void msm_gem_put_pages(struct drm_gem_object *obj) 195 { 196 /* when we start tracking the pin count, then do something here */ 197 } 198 199 int msm_gem_mmap_obj(struct drm_gem_object *obj, 200 struct vm_area_struct *vma) 201 { 202 struct msm_gem_object *msm_obj = to_msm_bo(obj); 203 204 vma->vm_flags &= ~VM_PFNMAP; 205 vma->vm_flags |= VM_MIXEDMAP; 206 207 if (msm_obj->flags & MSM_BO_WC) { 208 vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 209 } else if (msm_obj->flags & MSM_BO_UNCACHED) { 210 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 211 } else { 212 /* 213 * Shunt off cached objs to shmem file so they have their own 214 * address_space (so unmap_mapping_range does what we want, 215 * in particular in the case of mmap'd dmabufs) 216 */ 217 vma->vm_pgoff = 0; 218 vma_set_file(vma, obj->filp); 219 220 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 221 } 222 223 return 0; 224 } 225 226 int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 227 { 228 int ret; 229 230 ret = drm_gem_mmap(filp, vma); 231 if (ret) { 232 DBG("mmap failed: %d", ret); 233 return ret; 234 } 235 236 return msm_gem_mmap_obj(vma->vm_private_data, vma); 237 } 238 239 static vm_fault_t msm_gem_fault(struct vm_fault *vmf) 240 { 241 struct vm_area_struct *vma = vmf->vma; 242 struct drm_gem_object *obj = vma->vm_private_data; 243 struct msm_gem_object *msm_obj = to_msm_bo(obj); 244 struct page **pages; 245 unsigned long pfn; 246 pgoff_t pgoff; 247 int err; 248 vm_fault_t ret; 249 250 /* 251 * vm_ops.open/drm_gem_mmap_obj and close get and put 252 * a reference on obj. So, we dont need to hold one here. 253 */ 254 err = msm_gem_lock_interruptible(obj); 255 if (err) { 256 ret = VM_FAULT_NOPAGE; 257 goto out; 258 } 259 260 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 261 msm_gem_unlock(obj); 262 return VM_FAULT_SIGBUS; 263 } 264 265 /* make sure we have pages attached now */ 266 pages = get_pages(obj); 267 if (IS_ERR(pages)) { 268 ret = vmf_error(PTR_ERR(pages)); 269 goto out_unlock; 270 } 271 272 /* We don't use vmf->pgoff since that has the fake offset: */ 273 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 274 275 pfn = page_to_pfn(pages[pgoff]); 276 277 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 278 pfn, pfn << PAGE_SHIFT); 279 280 ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); 281 out_unlock: 282 msm_gem_unlock(obj); 283 out: 284 return ret; 285 } 286 287 /** get mmap offset */ 288 static uint64_t mmap_offset(struct drm_gem_object *obj) 289 { 290 struct drm_device *dev = obj->dev; 291 int ret; 292 293 GEM_WARN_ON(!msm_gem_is_locked(obj)); 294 295 /* Make it mmapable */ 296 ret = drm_gem_create_mmap_offset(obj); 297 298 if (ret) { 299 DRM_DEV_ERROR(dev->dev, "could not allocate mmap offset\n"); 300 return 0; 301 } 302 303 return drm_vma_node_offset_addr(&obj->vma_node); 304 } 305 306 uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 307 { 308 uint64_t offset; 309 310 msm_gem_lock(obj); 311 offset = mmap_offset(obj); 312 msm_gem_unlock(obj); 313 return offset; 314 } 315 316 static struct msm_gem_vma *add_vma(struct drm_gem_object *obj, 317 struct msm_gem_address_space *aspace) 318 { 319 struct msm_gem_object *msm_obj = to_msm_bo(obj); 320 struct msm_gem_vma *vma; 321 322 GEM_WARN_ON(!msm_gem_is_locked(obj)); 323 324 vma = kzalloc(sizeof(*vma), GFP_KERNEL); 325 if (!vma) 326 return ERR_PTR(-ENOMEM); 327 328 vma->aspace = aspace; 329 330 list_add_tail(&vma->list, &msm_obj->vmas); 331 332 return vma; 333 } 334 335 static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj, 336 struct msm_gem_address_space *aspace) 337 { 338 struct msm_gem_object *msm_obj = to_msm_bo(obj); 339 struct msm_gem_vma *vma; 340 341 GEM_WARN_ON(!msm_gem_is_locked(obj)); 342 343 list_for_each_entry(vma, &msm_obj->vmas, list) { 344 if (vma->aspace == aspace) 345 return vma; 346 } 347 348 return NULL; 349 } 350 351 static void del_vma(struct msm_gem_vma *vma) 352 { 353 if (!vma) 354 return; 355 356 list_del(&vma->list); 357 kfree(vma); 358 } 359 360 /* Called with msm_obj locked */ 361 static void 362 put_iova_spaces(struct drm_gem_object *obj) 363 { 364 struct msm_gem_object *msm_obj = to_msm_bo(obj); 365 struct msm_gem_vma *vma; 366 367 GEM_WARN_ON(!msm_gem_is_locked(obj)); 368 369 list_for_each_entry(vma, &msm_obj->vmas, list) { 370 if (vma->aspace) { 371 msm_gem_purge_vma(vma->aspace, vma); 372 msm_gem_close_vma(vma->aspace, vma); 373 } 374 } 375 } 376 377 /* Called with msm_obj locked */ 378 static void 379 put_iova_vmas(struct drm_gem_object *obj) 380 { 381 struct msm_gem_object *msm_obj = to_msm_bo(obj); 382 struct msm_gem_vma *vma, *tmp; 383 384 GEM_WARN_ON(!msm_gem_is_locked(obj)); 385 386 list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) { 387 del_vma(vma); 388 } 389 } 390 391 static int get_iova_locked(struct drm_gem_object *obj, 392 struct msm_gem_address_space *aspace, uint64_t *iova, 393 u64 range_start, u64 range_end) 394 { 395 struct msm_gem_vma *vma; 396 int ret = 0; 397 398 GEM_WARN_ON(!msm_gem_is_locked(obj)); 399 400 vma = lookup_vma(obj, aspace); 401 402 if (!vma) { 403 vma = add_vma(obj, aspace); 404 if (IS_ERR(vma)) 405 return PTR_ERR(vma); 406 407 ret = msm_gem_init_vma(aspace, vma, obj->size >> PAGE_SHIFT, 408 range_start, range_end); 409 if (ret) { 410 del_vma(vma); 411 return ret; 412 } 413 } 414 415 *iova = vma->iova; 416 return 0; 417 } 418 419 static int msm_gem_pin_iova(struct drm_gem_object *obj, 420 struct msm_gem_address_space *aspace) 421 { 422 struct msm_gem_object *msm_obj = to_msm_bo(obj); 423 struct msm_gem_vma *vma; 424 struct page **pages; 425 int prot = IOMMU_READ; 426 427 if (!(msm_obj->flags & MSM_BO_GPU_READONLY)) 428 prot |= IOMMU_WRITE; 429 430 if (msm_obj->flags & MSM_BO_MAP_PRIV) 431 prot |= IOMMU_PRIV; 432 433 GEM_WARN_ON(!msm_gem_is_locked(obj)); 434 435 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) 436 return -EBUSY; 437 438 vma = lookup_vma(obj, aspace); 439 if (GEM_WARN_ON(!vma)) 440 return -EINVAL; 441 442 pages = get_pages(obj); 443 if (IS_ERR(pages)) 444 return PTR_ERR(pages); 445 446 return msm_gem_map_vma(aspace, vma, prot, 447 msm_obj->sgt, obj->size >> PAGE_SHIFT); 448 } 449 450 static int get_and_pin_iova_range_locked(struct drm_gem_object *obj, 451 struct msm_gem_address_space *aspace, uint64_t *iova, 452 u64 range_start, u64 range_end) 453 { 454 u64 local; 455 int ret; 456 457 GEM_WARN_ON(!msm_gem_is_locked(obj)); 458 459 ret = get_iova_locked(obj, aspace, &local, 460 range_start, range_end); 461 462 if (!ret) 463 ret = msm_gem_pin_iova(obj, aspace); 464 465 if (!ret) 466 *iova = local; 467 468 return ret; 469 } 470 471 /* 472 * get iova and pin it. Should have a matching put 473 * limits iova to specified range (in pages) 474 */ 475 int msm_gem_get_and_pin_iova_range(struct drm_gem_object *obj, 476 struct msm_gem_address_space *aspace, uint64_t *iova, 477 u64 range_start, u64 range_end) 478 { 479 int ret; 480 481 msm_gem_lock(obj); 482 ret = get_and_pin_iova_range_locked(obj, aspace, iova, range_start, range_end); 483 msm_gem_unlock(obj); 484 485 return ret; 486 } 487 488 int msm_gem_get_and_pin_iova_locked(struct drm_gem_object *obj, 489 struct msm_gem_address_space *aspace, uint64_t *iova) 490 { 491 return get_and_pin_iova_range_locked(obj, aspace, iova, 0, U64_MAX); 492 } 493 494 /* get iova and pin it. Should have a matching put */ 495 int msm_gem_get_and_pin_iova(struct drm_gem_object *obj, 496 struct msm_gem_address_space *aspace, uint64_t *iova) 497 { 498 return msm_gem_get_and_pin_iova_range(obj, aspace, iova, 0, U64_MAX); 499 } 500 501 /* 502 * Get an iova but don't pin it. Doesn't need a put because iovas are currently 503 * valid for the life of the object 504 */ 505 int msm_gem_get_iova(struct drm_gem_object *obj, 506 struct msm_gem_address_space *aspace, uint64_t *iova) 507 { 508 int ret; 509 510 msm_gem_lock(obj); 511 ret = get_iova_locked(obj, aspace, iova, 0, U64_MAX); 512 msm_gem_unlock(obj); 513 514 return ret; 515 } 516 517 /* get iova without taking a reference, used in places where you have 518 * already done a 'msm_gem_get_and_pin_iova' or 'msm_gem_get_iova' 519 */ 520 uint64_t msm_gem_iova(struct drm_gem_object *obj, 521 struct msm_gem_address_space *aspace) 522 { 523 struct msm_gem_vma *vma; 524 525 msm_gem_lock(obj); 526 vma = lookup_vma(obj, aspace); 527 msm_gem_unlock(obj); 528 GEM_WARN_ON(!vma); 529 530 return vma ? vma->iova : 0; 531 } 532 533 /* 534 * Locked variant of msm_gem_unpin_iova() 535 */ 536 void msm_gem_unpin_iova_locked(struct drm_gem_object *obj, 537 struct msm_gem_address_space *aspace) 538 { 539 struct msm_gem_vma *vma; 540 541 GEM_WARN_ON(!msm_gem_is_locked(obj)); 542 543 vma = lookup_vma(obj, aspace); 544 545 if (!GEM_WARN_ON(!vma)) 546 msm_gem_unmap_vma(aspace, vma); 547 } 548 549 /* 550 * Unpin a iova by updating the reference counts. The memory isn't actually 551 * purged until something else (shrinker, mm_notifier, destroy, etc) decides 552 * to get rid of it 553 */ 554 void msm_gem_unpin_iova(struct drm_gem_object *obj, 555 struct msm_gem_address_space *aspace) 556 { 557 msm_gem_lock(obj); 558 msm_gem_unpin_iova_locked(obj, aspace); 559 msm_gem_unlock(obj); 560 } 561 562 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 563 struct drm_mode_create_dumb *args) 564 { 565 args->pitch = align_pitch(args->width, args->bpp); 566 args->size = PAGE_ALIGN(args->pitch * args->height); 567 return msm_gem_new_handle(dev, file, args->size, 568 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle, "dumb"); 569 } 570 571 int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 572 uint32_t handle, uint64_t *offset) 573 { 574 struct drm_gem_object *obj; 575 int ret = 0; 576 577 /* GEM does all our handle to object mapping */ 578 obj = drm_gem_object_lookup(file, handle); 579 if (obj == NULL) { 580 ret = -ENOENT; 581 goto fail; 582 } 583 584 *offset = msm_gem_mmap_offset(obj); 585 586 drm_gem_object_put(obj); 587 588 fail: 589 return ret; 590 } 591 592 static void *get_vaddr(struct drm_gem_object *obj, unsigned madv) 593 { 594 struct msm_gem_object *msm_obj = to_msm_bo(obj); 595 int ret = 0; 596 597 GEM_WARN_ON(!msm_gem_is_locked(obj)); 598 599 if (obj->import_attach) 600 return ERR_PTR(-ENODEV); 601 602 if (GEM_WARN_ON(msm_obj->madv > madv)) { 603 DRM_DEV_ERROR(obj->dev->dev, "Invalid madv state: %u vs %u\n", 604 msm_obj->madv, madv); 605 return ERR_PTR(-EBUSY); 606 } 607 608 /* increment vmap_count *before* vmap() call, so shrinker can 609 * check vmap_count (is_vunmapable()) outside of msm_obj lock. 610 * This guarantees that we won't try to msm_gem_vunmap() this 611 * same object from within the vmap() call (while we already 612 * hold msm_obj lock) 613 */ 614 msm_obj->vmap_count++; 615 616 if (!msm_obj->vaddr) { 617 struct page **pages = get_pages(obj); 618 if (IS_ERR(pages)) { 619 ret = PTR_ERR(pages); 620 goto fail; 621 } 622 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 623 VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 624 if (msm_obj->vaddr == NULL) { 625 ret = -ENOMEM; 626 goto fail; 627 } 628 } 629 630 return msm_obj->vaddr; 631 632 fail: 633 msm_obj->vmap_count--; 634 return ERR_PTR(ret); 635 } 636 637 void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) 638 { 639 return get_vaddr(obj, MSM_MADV_WILLNEED); 640 } 641 642 void *msm_gem_get_vaddr(struct drm_gem_object *obj) 643 { 644 void *ret; 645 646 msm_gem_lock(obj); 647 ret = msm_gem_get_vaddr_locked(obj); 648 msm_gem_unlock(obj); 649 650 return ret; 651 } 652 653 /* 654 * Don't use this! It is for the very special case of dumping 655 * submits from GPU hangs or faults, were the bo may already 656 * be MSM_MADV_DONTNEED, but we know the buffer is still on the 657 * active list. 658 */ 659 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj) 660 { 661 return get_vaddr(obj, __MSM_MADV_PURGED); 662 } 663 664 void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) 665 { 666 struct msm_gem_object *msm_obj = to_msm_bo(obj); 667 668 GEM_WARN_ON(!msm_gem_is_locked(obj)); 669 GEM_WARN_ON(msm_obj->vmap_count < 1); 670 671 msm_obj->vmap_count--; 672 } 673 674 void msm_gem_put_vaddr(struct drm_gem_object *obj) 675 { 676 msm_gem_lock(obj); 677 msm_gem_put_vaddr_locked(obj); 678 msm_gem_unlock(obj); 679 } 680 681 /* Update madvise status, returns true if not purged, else 682 * false or -errno. 683 */ 684 int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) 685 { 686 struct msm_gem_object *msm_obj = to_msm_bo(obj); 687 688 msm_gem_lock(obj); 689 690 if (msm_obj->madv != __MSM_MADV_PURGED) 691 msm_obj->madv = madv; 692 693 madv = msm_obj->madv; 694 695 /* If the obj is inactive, we might need to move it 696 * between inactive lists 697 */ 698 if (msm_obj->active_count == 0) 699 update_inactive(msm_obj); 700 701 msm_gem_unlock(obj); 702 703 return (madv != __MSM_MADV_PURGED); 704 } 705 706 void msm_gem_purge(struct drm_gem_object *obj) 707 { 708 struct drm_device *dev = obj->dev; 709 struct msm_gem_object *msm_obj = to_msm_bo(obj); 710 711 GEM_WARN_ON(!is_purgeable(msm_obj)); 712 GEM_WARN_ON(obj->import_attach); 713 714 put_iova_spaces(obj); 715 716 msm_gem_vunmap(obj); 717 718 put_pages(obj); 719 720 put_iova_vmas(obj); 721 722 msm_obj->madv = __MSM_MADV_PURGED; 723 update_inactive(msm_obj); 724 725 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 726 drm_gem_free_mmap_offset(obj); 727 728 /* Our goal here is to return as much of the memory as 729 * is possible back to the system as we are called from OOM. 730 * To do this we must instruct the shmfs to drop all of its 731 * backing pages, *now*. 732 */ 733 shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); 734 735 invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 736 0, (loff_t)-1); 737 } 738 739 void msm_gem_vunmap(struct drm_gem_object *obj) 740 { 741 struct msm_gem_object *msm_obj = to_msm_bo(obj); 742 743 GEM_WARN_ON(!msm_gem_is_locked(obj)); 744 745 if (!msm_obj->vaddr || GEM_WARN_ON(!is_vunmapable(msm_obj))) 746 return; 747 748 vunmap(msm_obj->vaddr); 749 msm_obj->vaddr = NULL; 750 } 751 752 /* must be called before _move_to_active().. */ 753 int msm_gem_sync_object(struct drm_gem_object *obj, 754 struct msm_fence_context *fctx, bool exclusive) 755 { 756 struct dma_resv_list *fobj; 757 struct dma_fence *fence; 758 int i, ret; 759 760 fobj = dma_resv_get_list(obj->resv); 761 if (!fobj || (fobj->shared_count == 0)) { 762 fence = dma_resv_get_excl(obj->resv); 763 /* don't need to wait on our own fences, since ring is fifo */ 764 if (fence && (fence->context != fctx->context)) { 765 ret = dma_fence_wait(fence, true); 766 if (ret) 767 return ret; 768 } 769 } 770 771 if (!exclusive || !fobj) 772 return 0; 773 774 for (i = 0; i < fobj->shared_count; i++) { 775 fence = rcu_dereference_protected(fobj->shared[i], 776 dma_resv_held(obj->resv)); 777 if (fence->context != fctx->context) { 778 ret = dma_fence_wait(fence, true); 779 if (ret) 780 return ret; 781 } 782 } 783 784 return 0; 785 } 786 787 void msm_gem_active_get(struct drm_gem_object *obj, struct msm_gpu *gpu) 788 { 789 struct msm_gem_object *msm_obj = to_msm_bo(obj); 790 struct msm_drm_private *priv = obj->dev->dev_private; 791 792 might_sleep(); 793 GEM_WARN_ON(!msm_gem_is_locked(obj)); 794 GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); 795 GEM_WARN_ON(msm_obj->dontneed); 796 797 if (msm_obj->active_count++ == 0) { 798 mutex_lock(&priv->mm_lock); 799 list_del(&msm_obj->mm_list); 800 list_add_tail(&msm_obj->mm_list, &gpu->active_list); 801 mutex_unlock(&priv->mm_lock); 802 } 803 } 804 805 void msm_gem_active_put(struct drm_gem_object *obj) 806 { 807 struct msm_gem_object *msm_obj = to_msm_bo(obj); 808 809 might_sleep(); 810 GEM_WARN_ON(!msm_gem_is_locked(obj)); 811 812 if (--msm_obj->active_count == 0) { 813 update_inactive(msm_obj); 814 } 815 } 816 817 static void update_inactive(struct msm_gem_object *msm_obj) 818 { 819 struct msm_drm_private *priv = msm_obj->base.dev->dev_private; 820 821 mutex_lock(&priv->mm_lock); 822 GEM_WARN_ON(msm_obj->active_count != 0); 823 824 if (msm_obj->dontneed) 825 mark_unpurgeable(msm_obj); 826 827 list_del(&msm_obj->mm_list); 828 if (msm_obj->madv == MSM_MADV_WILLNEED) { 829 list_add_tail(&msm_obj->mm_list, &priv->inactive_willneed); 830 } else if (msm_obj->madv == MSM_MADV_DONTNEED) { 831 list_add_tail(&msm_obj->mm_list, &priv->inactive_dontneed); 832 mark_purgeable(msm_obj); 833 } else { 834 GEM_WARN_ON(msm_obj->madv != __MSM_MADV_PURGED); 835 list_add_tail(&msm_obj->mm_list, &priv->inactive_purged); 836 } 837 838 mutex_unlock(&priv->mm_lock); 839 } 840 841 int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 842 { 843 bool write = !!(op & MSM_PREP_WRITE); 844 unsigned long remain = 845 op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); 846 long ret; 847 848 ret = dma_resv_wait_timeout_rcu(obj->resv, write, 849 true, remain); 850 if (ret == 0) 851 return remain == 0 ? -EBUSY : -ETIMEDOUT; 852 else if (ret < 0) 853 return ret; 854 855 /* TODO cache maintenance */ 856 857 return 0; 858 } 859 860 int msm_gem_cpu_fini(struct drm_gem_object *obj) 861 { 862 /* TODO cache maintenance */ 863 return 0; 864 } 865 866 #ifdef CONFIG_DEBUG_FS 867 static void describe_fence(struct dma_fence *fence, const char *type, 868 struct seq_file *m) 869 { 870 if (!dma_fence_is_signaled(fence)) 871 seq_printf(m, "\t%9s: %s %s seq %llu\n", type, 872 fence->ops->get_driver_name(fence), 873 fence->ops->get_timeline_name(fence), 874 fence->seqno); 875 } 876 877 void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m, 878 struct msm_gem_stats *stats) 879 { 880 struct msm_gem_object *msm_obj = to_msm_bo(obj); 881 struct dma_resv *robj = obj->resv; 882 struct dma_resv_list *fobj; 883 struct dma_fence *fence; 884 struct msm_gem_vma *vma; 885 uint64_t off = drm_vma_node_start(&obj->vma_node); 886 const char *madv; 887 888 msm_gem_lock(obj); 889 890 stats->all.count++; 891 stats->all.size += obj->size; 892 893 if (is_active(msm_obj)) { 894 stats->active.count++; 895 stats->active.size += obj->size; 896 } 897 898 switch (msm_obj->madv) { 899 case __MSM_MADV_PURGED: 900 stats->purged.count++; 901 stats->purged.size += obj->size; 902 madv = " purged"; 903 break; 904 case MSM_MADV_DONTNEED: 905 stats->purgeable.count++; 906 stats->purgeable.size += obj->size; 907 madv = " purgeable"; 908 break; 909 case MSM_MADV_WILLNEED: 910 default: 911 madv = ""; 912 break; 913 } 914 915 seq_printf(m, "%08x: %c %2d (%2d) %08llx %p", 916 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 917 obj->name, kref_read(&obj->refcount), 918 off, msm_obj->vaddr); 919 920 seq_printf(m, " %08zu %9s %-32s\n", obj->size, madv, msm_obj->name); 921 922 if (!list_empty(&msm_obj->vmas)) { 923 924 seq_puts(m, " vmas:"); 925 926 list_for_each_entry(vma, &msm_obj->vmas, list) { 927 const char *name, *comm; 928 if (vma->aspace) { 929 struct msm_gem_address_space *aspace = vma->aspace; 930 struct task_struct *task = 931 get_pid_task(aspace->pid, PIDTYPE_PID); 932 if (task) { 933 comm = kstrdup(task->comm, GFP_KERNEL); 934 } else { 935 comm = NULL; 936 } 937 name = aspace->name; 938 } else { 939 name = comm = NULL; 940 } 941 seq_printf(m, " [%s%s%s: aspace=%p, %08llx,%s,inuse=%d]", 942 name, comm ? ":" : "", comm ? comm : "", 943 vma->aspace, vma->iova, 944 vma->mapped ? "mapped" : "unmapped", 945 vma->inuse); 946 kfree(comm); 947 } 948 949 seq_puts(m, "\n"); 950 } 951 952 rcu_read_lock(); 953 fobj = rcu_dereference(robj->fence); 954 if (fobj) { 955 unsigned int i, shared_count = fobj->shared_count; 956 957 for (i = 0; i < shared_count; i++) { 958 fence = rcu_dereference(fobj->shared[i]); 959 describe_fence(fence, "Shared", m); 960 } 961 } 962 963 fence = rcu_dereference(robj->fence_excl); 964 if (fence) 965 describe_fence(fence, "Exclusive", m); 966 rcu_read_unlock(); 967 968 msm_gem_unlock(obj); 969 } 970 971 void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 972 { 973 struct msm_gem_stats stats = {}; 974 struct msm_gem_object *msm_obj; 975 976 seq_puts(m, " flags id ref offset kaddr size madv name\n"); 977 list_for_each_entry(msm_obj, list, node) { 978 struct drm_gem_object *obj = &msm_obj->base; 979 seq_puts(m, " "); 980 msm_gem_describe(obj, m, &stats); 981 } 982 983 seq_printf(m, "Total: %4d objects, %9zu bytes\n", 984 stats.all.count, stats.all.size); 985 seq_printf(m, "Active: %4d objects, %9zu bytes\n", 986 stats.active.count, stats.active.size); 987 seq_printf(m, "Purgeable: %4d objects, %9zu bytes\n", 988 stats.purgeable.count, stats.purgeable.size); 989 seq_printf(m, "Purged: %4d objects, %9zu bytes\n", 990 stats.purged.count, stats.purged.size); 991 } 992 #endif 993 994 /* don't call directly! Use drm_gem_object_put_locked() and friends */ 995 void msm_gem_free_object(struct drm_gem_object *obj) 996 { 997 struct msm_gem_object *msm_obj = to_msm_bo(obj); 998 struct drm_device *dev = obj->dev; 999 struct msm_drm_private *priv = dev->dev_private; 1000 1001 mutex_lock(&priv->obj_lock); 1002 list_del(&msm_obj->node); 1003 mutex_unlock(&priv->obj_lock); 1004 1005 mutex_lock(&priv->mm_lock); 1006 if (msm_obj->dontneed) 1007 mark_unpurgeable(msm_obj); 1008 list_del(&msm_obj->mm_list); 1009 mutex_unlock(&priv->mm_lock); 1010 1011 msm_gem_lock(obj); 1012 1013 /* object should not be on active list: */ 1014 GEM_WARN_ON(is_active(msm_obj)); 1015 1016 put_iova_spaces(obj); 1017 1018 if (obj->import_attach) { 1019 GEM_WARN_ON(msm_obj->vaddr); 1020 1021 /* Don't drop the pages for imported dmabuf, as they are not 1022 * ours, just free the array we allocated: 1023 */ 1024 kvfree(msm_obj->pages); 1025 1026 put_iova_vmas(obj); 1027 1028 /* dma_buf_detach() grabs resv lock, so we need to unlock 1029 * prior to drm_prime_gem_destroy 1030 */ 1031 msm_gem_unlock(obj); 1032 1033 drm_prime_gem_destroy(obj, msm_obj->sgt); 1034 } else { 1035 msm_gem_vunmap(obj); 1036 put_pages(obj); 1037 put_iova_vmas(obj); 1038 msm_gem_unlock(obj); 1039 } 1040 1041 drm_gem_object_release(obj); 1042 1043 kfree(msm_obj); 1044 } 1045 1046 /* convenience method to construct a GEM buffer object, and userspace handle */ 1047 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 1048 uint32_t size, uint32_t flags, uint32_t *handle, 1049 char *name) 1050 { 1051 struct drm_gem_object *obj; 1052 int ret; 1053 1054 obj = msm_gem_new(dev, size, flags); 1055 1056 if (IS_ERR(obj)) 1057 return PTR_ERR(obj); 1058 1059 if (name) 1060 msm_gem_object_set_name(obj, "%s", name); 1061 1062 ret = drm_gem_handle_create(file, obj, handle); 1063 1064 /* drop reference from allocate - handle holds it now */ 1065 drm_gem_object_put(obj); 1066 1067 return ret; 1068 } 1069 1070 static const struct vm_operations_struct vm_ops = { 1071 .fault = msm_gem_fault, 1072 .open = drm_gem_vm_open, 1073 .close = drm_gem_vm_close, 1074 }; 1075 1076 static const struct drm_gem_object_funcs msm_gem_object_funcs = { 1077 .free = msm_gem_free_object, 1078 .pin = msm_gem_prime_pin, 1079 .unpin = msm_gem_prime_unpin, 1080 .get_sg_table = msm_gem_prime_get_sg_table, 1081 .vmap = msm_gem_prime_vmap, 1082 .vunmap = msm_gem_prime_vunmap, 1083 .vm_ops = &vm_ops, 1084 }; 1085 1086 static int msm_gem_new_impl(struct drm_device *dev, 1087 uint32_t size, uint32_t flags, 1088 struct drm_gem_object **obj) 1089 { 1090 struct msm_gem_object *msm_obj; 1091 1092 switch (flags & MSM_BO_CACHE_MASK) { 1093 case MSM_BO_UNCACHED: 1094 case MSM_BO_CACHED: 1095 case MSM_BO_WC: 1096 break; 1097 default: 1098 DRM_DEV_ERROR(dev->dev, "invalid cache flag: %x\n", 1099 (flags & MSM_BO_CACHE_MASK)); 1100 return -EINVAL; 1101 } 1102 1103 msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 1104 if (!msm_obj) 1105 return -ENOMEM; 1106 1107 msm_obj->flags = flags; 1108 msm_obj->madv = MSM_MADV_WILLNEED; 1109 1110 INIT_LIST_HEAD(&msm_obj->submit_entry); 1111 INIT_LIST_HEAD(&msm_obj->vmas); 1112 1113 *obj = &msm_obj->base; 1114 (*obj)->funcs = &msm_gem_object_funcs; 1115 1116 return 0; 1117 } 1118 1119 static struct drm_gem_object *_msm_gem_new(struct drm_device *dev, 1120 uint32_t size, uint32_t flags, bool struct_mutex_locked) 1121 { 1122 struct msm_drm_private *priv = dev->dev_private; 1123 struct msm_gem_object *msm_obj; 1124 struct drm_gem_object *obj = NULL; 1125 bool use_vram = false; 1126 int ret; 1127 1128 size = PAGE_ALIGN(size); 1129 1130 if (!msm_use_mmu(dev)) 1131 use_vram = true; 1132 else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && priv->vram.size) 1133 use_vram = true; 1134 1135 if (GEM_WARN_ON(use_vram && !priv->vram.size)) 1136 return ERR_PTR(-EINVAL); 1137 1138 /* Disallow zero sized objects as they make the underlying 1139 * infrastructure grumpy 1140 */ 1141 if (size == 0) 1142 return ERR_PTR(-EINVAL); 1143 1144 ret = msm_gem_new_impl(dev, size, flags, &obj); 1145 if (ret) 1146 goto fail; 1147 1148 msm_obj = to_msm_bo(obj); 1149 1150 if (use_vram) { 1151 struct msm_gem_vma *vma; 1152 struct page **pages; 1153 1154 drm_gem_private_object_init(dev, obj, size); 1155 1156 msm_gem_lock(obj); 1157 1158 vma = add_vma(obj, NULL); 1159 msm_gem_unlock(obj); 1160 if (IS_ERR(vma)) { 1161 ret = PTR_ERR(vma); 1162 goto fail; 1163 } 1164 1165 to_msm_bo(obj)->vram_node = &vma->node; 1166 1167 msm_gem_lock(obj); 1168 pages = get_pages(obj); 1169 msm_gem_unlock(obj); 1170 if (IS_ERR(pages)) { 1171 ret = PTR_ERR(pages); 1172 goto fail; 1173 } 1174 1175 vma->iova = physaddr(obj); 1176 } else { 1177 ret = drm_gem_object_init(dev, obj, size); 1178 if (ret) 1179 goto fail; 1180 /* 1181 * Our buffers are kept pinned, so allocating them from the 1182 * MOVABLE zone is a really bad idea, and conflicts with CMA. 1183 * See comments above new_inode() why this is required _and_ 1184 * expected if you're going to pin these pages. 1185 */ 1186 mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER); 1187 } 1188 1189 mutex_lock(&priv->mm_lock); 1190 /* Initially obj is idle, obj->madv == WILLNEED: */ 1191 list_add_tail(&msm_obj->mm_list, &priv->inactive_willneed); 1192 mutex_unlock(&priv->mm_lock); 1193 1194 mutex_lock(&priv->obj_lock); 1195 list_add_tail(&msm_obj->node, &priv->objects); 1196 mutex_unlock(&priv->obj_lock); 1197 1198 return obj; 1199 1200 fail: 1201 if (struct_mutex_locked) { 1202 drm_gem_object_put_locked(obj); 1203 } else { 1204 drm_gem_object_put(obj); 1205 } 1206 return ERR_PTR(ret); 1207 } 1208 1209 struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev, 1210 uint32_t size, uint32_t flags) 1211 { 1212 return _msm_gem_new(dev, size, flags, true); 1213 } 1214 1215 struct drm_gem_object *msm_gem_new(struct drm_device *dev, 1216 uint32_t size, uint32_t flags) 1217 { 1218 return _msm_gem_new(dev, size, flags, false); 1219 } 1220 1221 struct drm_gem_object *msm_gem_import(struct drm_device *dev, 1222 struct dma_buf *dmabuf, struct sg_table *sgt) 1223 { 1224 struct msm_drm_private *priv = dev->dev_private; 1225 struct msm_gem_object *msm_obj; 1226 struct drm_gem_object *obj; 1227 uint32_t size; 1228 int ret, npages; 1229 1230 /* if we don't have IOMMU, don't bother pretending we can import: */ 1231 if (!msm_use_mmu(dev)) { 1232 DRM_DEV_ERROR(dev->dev, "cannot import without IOMMU\n"); 1233 return ERR_PTR(-EINVAL); 1234 } 1235 1236 size = PAGE_ALIGN(dmabuf->size); 1237 1238 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); 1239 if (ret) 1240 goto fail; 1241 1242 drm_gem_private_object_init(dev, obj, size); 1243 1244 npages = size / PAGE_SIZE; 1245 1246 msm_obj = to_msm_bo(obj); 1247 msm_gem_lock(obj); 1248 msm_obj->sgt = sgt; 1249 msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 1250 if (!msm_obj->pages) { 1251 msm_gem_unlock(obj); 1252 ret = -ENOMEM; 1253 goto fail; 1254 } 1255 1256 ret = drm_prime_sg_to_page_array(sgt, msm_obj->pages, npages); 1257 if (ret) { 1258 msm_gem_unlock(obj); 1259 goto fail; 1260 } 1261 1262 msm_gem_unlock(obj); 1263 1264 mutex_lock(&priv->mm_lock); 1265 list_add_tail(&msm_obj->mm_list, &priv->inactive_willneed); 1266 mutex_unlock(&priv->mm_lock); 1267 1268 mutex_lock(&priv->obj_lock); 1269 list_add_tail(&msm_obj->node, &priv->objects); 1270 mutex_unlock(&priv->obj_lock); 1271 1272 return obj; 1273 1274 fail: 1275 drm_gem_object_put(obj); 1276 return ERR_PTR(ret); 1277 } 1278 1279 static void *_msm_gem_kernel_new(struct drm_device *dev, uint32_t size, 1280 uint32_t flags, struct msm_gem_address_space *aspace, 1281 struct drm_gem_object **bo, uint64_t *iova, bool locked) 1282 { 1283 void *vaddr; 1284 struct drm_gem_object *obj = _msm_gem_new(dev, size, flags, locked); 1285 int ret; 1286 1287 if (IS_ERR(obj)) 1288 return ERR_CAST(obj); 1289 1290 if (iova) { 1291 ret = msm_gem_get_and_pin_iova(obj, aspace, iova); 1292 if (ret) 1293 goto err; 1294 } 1295 1296 vaddr = msm_gem_get_vaddr(obj); 1297 if (IS_ERR(vaddr)) { 1298 msm_gem_unpin_iova(obj, aspace); 1299 ret = PTR_ERR(vaddr); 1300 goto err; 1301 } 1302 1303 if (bo) 1304 *bo = obj; 1305 1306 return vaddr; 1307 err: 1308 if (locked) 1309 drm_gem_object_put_locked(obj); 1310 else 1311 drm_gem_object_put(obj); 1312 1313 return ERR_PTR(ret); 1314 1315 } 1316 1317 void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size, 1318 uint32_t flags, struct msm_gem_address_space *aspace, 1319 struct drm_gem_object **bo, uint64_t *iova) 1320 { 1321 return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, false); 1322 } 1323 1324 void *msm_gem_kernel_new_locked(struct drm_device *dev, uint32_t size, 1325 uint32_t flags, struct msm_gem_address_space *aspace, 1326 struct drm_gem_object **bo, uint64_t *iova) 1327 { 1328 return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, true); 1329 } 1330 1331 void msm_gem_kernel_put(struct drm_gem_object *bo, 1332 struct msm_gem_address_space *aspace, bool locked) 1333 { 1334 if (IS_ERR_OR_NULL(bo)) 1335 return; 1336 1337 msm_gem_put_vaddr(bo); 1338 msm_gem_unpin_iova(bo, aspace); 1339 1340 if (locked) 1341 drm_gem_object_put_locked(bo); 1342 else 1343 drm_gem_object_put(bo); 1344 } 1345 1346 void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...) 1347 { 1348 struct msm_gem_object *msm_obj = to_msm_bo(bo); 1349 va_list ap; 1350 1351 if (!fmt) 1352 return; 1353 1354 va_start(ap, fmt); 1355 vsnprintf(msm_obj->name, sizeof(msm_obj->name), fmt, ap); 1356 va_end(ap); 1357 } 1358