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 struct msm_gem_vma *get_vma_locked(struct drm_gem_object *obj, 380 struct msm_gem_address_space *aspace, 381 u64 range_start, u64 range_end) 382 { 383 struct msm_gem_vma *vma; 384 385 GEM_WARN_ON(!msm_gem_is_locked(obj)); 386 387 vma = lookup_vma(obj, aspace); 388 389 if (!vma) { 390 int ret; 391 392 vma = add_vma(obj, aspace); 393 if (IS_ERR(vma)) 394 return vma; 395 396 ret = msm_gem_init_vma(aspace, vma, obj->size, 397 range_start, range_end); 398 if (ret) { 399 del_vma(vma); 400 return ERR_PTR(ret); 401 } 402 } else { 403 GEM_WARN_ON(vma->iova < range_start); 404 GEM_WARN_ON((vma->iova + obj->size) > range_end); 405 } 406 407 return vma; 408 } 409 410 int msm_gem_pin_vma_locked(struct drm_gem_object *obj, struct msm_gem_vma *vma) 411 { 412 struct msm_gem_object *msm_obj = to_msm_bo(obj); 413 struct page **pages; 414 int ret, prot = IOMMU_READ; 415 416 if (!(msm_obj->flags & MSM_BO_GPU_READONLY)) 417 prot |= IOMMU_WRITE; 418 419 if (msm_obj->flags & MSM_BO_MAP_PRIV) 420 prot |= IOMMU_PRIV; 421 422 if (msm_obj->flags & MSM_BO_CACHED_COHERENT) 423 prot |= IOMMU_CACHE; 424 425 GEM_WARN_ON(!msm_gem_is_locked(obj)); 426 427 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) 428 return -EBUSY; 429 430 pages = get_pages(obj); 431 if (IS_ERR(pages)) 432 return PTR_ERR(pages); 433 434 ret = msm_gem_map_vma(vma->aspace, vma, prot, msm_obj->sgt, obj->size); 435 436 if (!ret) 437 msm_obj->pin_count++; 438 439 return ret; 440 } 441 442 void msm_gem_unpin_vma_locked(struct drm_gem_object *obj, struct msm_gem_vma *vma) 443 { 444 struct msm_gem_object *msm_obj = to_msm_bo(obj); 445 446 GEM_WARN_ON(!msm_gem_is_locked(obj)); 447 448 msm_gem_unmap_vma(vma->aspace, vma); 449 450 msm_obj->pin_count--; 451 GEM_WARN_ON(msm_obj->pin_count < 0); 452 453 update_inactive(msm_obj); 454 } 455 456 struct msm_gem_vma *msm_gem_get_vma_locked(struct drm_gem_object *obj, 457 struct msm_gem_address_space *aspace) 458 { 459 return get_vma_locked(obj, aspace, 0, U64_MAX); 460 } 461 462 static int get_and_pin_iova_range_locked(struct drm_gem_object *obj, 463 struct msm_gem_address_space *aspace, uint64_t *iova, 464 u64 range_start, u64 range_end) 465 { 466 struct msm_gem_vma *vma; 467 int ret; 468 469 GEM_WARN_ON(!msm_gem_is_locked(obj)); 470 471 vma = get_vma_locked(obj, aspace, range_start, range_end); 472 if (IS_ERR(vma)) 473 return PTR_ERR(vma); 474 475 ret = msm_gem_pin_vma_locked(obj, vma); 476 if (!ret) 477 *iova = vma->iova; 478 479 return ret; 480 } 481 482 /* 483 * get iova and pin it. Should have a matching put 484 * limits iova to specified range (in pages) 485 */ 486 int msm_gem_get_and_pin_iova_range(struct drm_gem_object *obj, 487 struct msm_gem_address_space *aspace, uint64_t *iova, 488 u64 range_start, u64 range_end) 489 { 490 int ret; 491 492 msm_gem_lock(obj); 493 ret = get_and_pin_iova_range_locked(obj, aspace, iova, range_start, range_end); 494 msm_gem_unlock(obj); 495 496 return ret; 497 } 498 499 /* get iova and pin it. Should have a matching put */ 500 int msm_gem_get_and_pin_iova(struct drm_gem_object *obj, 501 struct msm_gem_address_space *aspace, uint64_t *iova) 502 { 503 return msm_gem_get_and_pin_iova_range(obj, aspace, iova, 0, U64_MAX); 504 } 505 506 /* 507 * Get an iova but don't pin it. Doesn't need a put because iovas are currently 508 * valid for the life of the object 509 */ 510 int msm_gem_get_iova(struct drm_gem_object *obj, 511 struct msm_gem_address_space *aspace, uint64_t *iova) 512 { 513 struct msm_gem_vma *vma; 514 int ret = 0; 515 516 msm_gem_lock(obj); 517 vma = get_vma_locked(obj, aspace, 0, U64_MAX); 518 if (IS_ERR(vma)) { 519 ret = PTR_ERR(vma); 520 } else { 521 *iova = vma->iova; 522 } 523 msm_gem_unlock(obj); 524 525 return ret; 526 } 527 528 /* 529 * Unpin a iova by updating the reference counts. The memory isn't actually 530 * purged until something else (shrinker, mm_notifier, destroy, etc) decides 531 * to get rid of it 532 */ 533 void msm_gem_unpin_iova(struct drm_gem_object *obj, 534 struct msm_gem_address_space *aspace) 535 { 536 struct msm_gem_vma *vma; 537 538 msm_gem_lock(obj); 539 vma = lookup_vma(obj, aspace); 540 if (!GEM_WARN_ON(!vma)) { 541 msm_gem_unpin_vma_locked(obj, vma); 542 } 543 msm_gem_unlock(obj); 544 } 545 546 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 547 struct drm_mode_create_dumb *args) 548 { 549 args->pitch = align_pitch(args->width, args->bpp); 550 args->size = PAGE_ALIGN(args->pitch * args->height); 551 return msm_gem_new_handle(dev, file, args->size, 552 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle, "dumb"); 553 } 554 555 int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 556 uint32_t handle, uint64_t *offset) 557 { 558 struct drm_gem_object *obj; 559 int ret = 0; 560 561 /* GEM does all our handle to object mapping */ 562 obj = drm_gem_object_lookup(file, handle); 563 if (obj == NULL) { 564 ret = -ENOENT; 565 goto fail; 566 } 567 568 *offset = msm_gem_mmap_offset(obj); 569 570 drm_gem_object_put(obj); 571 572 fail: 573 return ret; 574 } 575 576 static void *get_vaddr(struct drm_gem_object *obj, unsigned madv) 577 { 578 struct msm_gem_object *msm_obj = to_msm_bo(obj); 579 int ret = 0; 580 581 GEM_WARN_ON(!msm_gem_is_locked(obj)); 582 583 if (obj->import_attach) 584 return ERR_PTR(-ENODEV); 585 586 if (GEM_WARN_ON(msm_obj->madv > madv)) { 587 DRM_DEV_ERROR(obj->dev->dev, "Invalid madv state: %u vs %u\n", 588 msm_obj->madv, madv); 589 return ERR_PTR(-EBUSY); 590 } 591 592 /* increment vmap_count *before* vmap() call, so shrinker can 593 * check vmap_count (is_vunmapable()) outside of msm_obj lock. 594 * This guarantees that we won't try to msm_gem_vunmap() this 595 * same object from within the vmap() call (while we already 596 * hold msm_obj lock) 597 */ 598 msm_obj->vmap_count++; 599 600 if (!msm_obj->vaddr) { 601 struct page **pages = get_pages(obj); 602 if (IS_ERR(pages)) { 603 ret = PTR_ERR(pages); 604 goto fail; 605 } 606 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 607 VM_MAP, msm_gem_pgprot(msm_obj, PAGE_KERNEL)); 608 if (msm_obj->vaddr == NULL) { 609 ret = -ENOMEM; 610 goto fail; 611 } 612 613 update_inactive(msm_obj); 614 } 615 616 return msm_obj->vaddr; 617 618 fail: 619 msm_obj->vmap_count--; 620 return ERR_PTR(ret); 621 } 622 623 void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) 624 { 625 return get_vaddr(obj, MSM_MADV_WILLNEED); 626 } 627 628 void *msm_gem_get_vaddr(struct drm_gem_object *obj) 629 { 630 void *ret; 631 632 msm_gem_lock(obj); 633 ret = msm_gem_get_vaddr_locked(obj); 634 msm_gem_unlock(obj); 635 636 return ret; 637 } 638 639 /* 640 * Don't use this! It is for the very special case of dumping 641 * submits from GPU hangs or faults, were the bo may already 642 * be MSM_MADV_DONTNEED, but we know the buffer is still on the 643 * active list. 644 */ 645 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj) 646 { 647 return get_vaddr(obj, __MSM_MADV_PURGED); 648 } 649 650 void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) 651 { 652 struct msm_gem_object *msm_obj = to_msm_bo(obj); 653 654 GEM_WARN_ON(!msm_gem_is_locked(obj)); 655 GEM_WARN_ON(msm_obj->vmap_count < 1); 656 657 msm_obj->vmap_count--; 658 } 659 660 void msm_gem_put_vaddr(struct drm_gem_object *obj) 661 { 662 msm_gem_lock(obj); 663 msm_gem_put_vaddr_locked(obj); 664 msm_gem_unlock(obj); 665 } 666 667 /* Update madvise status, returns true if not purged, else 668 * false or -errno. 669 */ 670 int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) 671 { 672 struct msm_gem_object *msm_obj = to_msm_bo(obj); 673 674 msm_gem_lock(obj); 675 676 if (msm_obj->madv != __MSM_MADV_PURGED) 677 msm_obj->madv = madv; 678 679 madv = msm_obj->madv; 680 681 /* If the obj is inactive, we might need to move it 682 * between inactive lists 683 */ 684 if (msm_obj->active_count == 0) 685 update_inactive(msm_obj); 686 687 msm_gem_unlock(obj); 688 689 return (madv != __MSM_MADV_PURGED); 690 } 691 692 void msm_gem_purge(struct drm_gem_object *obj) 693 { 694 struct drm_device *dev = obj->dev; 695 struct msm_gem_object *msm_obj = to_msm_bo(obj); 696 697 GEM_WARN_ON(!msm_gem_is_locked(obj)); 698 GEM_WARN_ON(!is_purgeable(msm_obj)); 699 700 /* Get rid of any iommu mapping(s): */ 701 put_iova_spaces(obj, true); 702 703 msm_gem_vunmap(obj); 704 705 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 706 707 put_pages(obj); 708 709 put_iova_vmas(obj); 710 711 msm_obj->madv = __MSM_MADV_PURGED; 712 update_inactive(msm_obj); 713 714 drm_gem_free_mmap_offset(obj); 715 716 /* Our goal here is to return as much of the memory as 717 * is possible back to the system as we are called from OOM. 718 * To do this we must instruct the shmfs to drop all of its 719 * backing pages, *now*. 720 */ 721 shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); 722 723 invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 724 0, (loff_t)-1); 725 } 726 727 /* 728 * Unpin the backing pages and make them available to be swapped out. 729 */ 730 void msm_gem_evict(struct drm_gem_object *obj) 731 { 732 struct drm_device *dev = obj->dev; 733 struct msm_gem_object *msm_obj = to_msm_bo(obj); 734 735 GEM_WARN_ON(!msm_gem_is_locked(obj)); 736 GEM_WARN_ON(is_unevictable(msm_obj)); 737 GEM_WARN_ON(!msm_obj->evictable); 738 GEM_WARN_ON(msm_obj->active_count); 739 740 /* Get rid of any iommu mapping(s): */ 741 put_iova_spaces(obj, false); 742 743 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 744 745 put_pages(obj); 746 747 update_inactive(msm_obj); 748 } 749 750 void msm_gem_vunmap(struct drm_gem_object *obj) 751 { 752 struct msm_gem_object *msm_obj = to_msm_bo(obj); 753 754 GEM_WARN_ON(!msm_gem_is_locked(obj)); 755 756 if (!msm_obj->vaddr || GEM_WARN_ON(!is_vunmapable(msm_obj))) 757 return; 758 759 vunmap(msm_obj->vaddr); 760 msm_obj->vaddr = NULL; 761 } 762 763 void msm_gem_active_get(struct drm_gem_object *obj, struct msm_gpu *gpu) 764 { 765 struct msm_gem_object *msm_obj = to_msm_bo(obj); 766 struct msm_drm_private *priv = obj->dev->dev_private; 767 768 might_sleep(); 769 GEM_WARN_ON(!msm_gem_is_locked(obj)); 770 GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); 771 GEM_WARN_ON(msm_obj->dontneed); 772 773 if (msm_obj->active_count++ == 0) { 774 mutex_lock(&priv->mm_lock); 775 if (msm_obj->evictable) 776 mark_unevictable(msm_obj); 777 list_move_tail(&msm_obj->mm_list, &gpu->active_list); 778 mutex_unlock(&priv->mm_lock); 779 } 780 } 781 782 void msm_gem_active_put(struct drm_gem_object *obj) 783 { 784 struct msm_gem_object *msm_obj = to_msm_bo(obj); 785 786 might_sleep(); 787 GEM_WARN_ON(!msm_gem_is_locked(obj)); 788 789 if (--msm_obj->active_count == 0) { 790 update_inactive(msm_obj); 791 } 792 } 793 794 static void update_inactive(struct msm_gem_object *msm_obj) 795 { 796 struct msm_drm_private *priv = msm_obj->base.dev->dev_private; 797 798 GEM_WARN_ON(!msm_gem_is_locked(&msm_obj->base)); 799 800 if (msm_obj->active_count != 0) 801 return; 802 803 mutex_lock(&priv->mm_lock); 804 805 if (msm_obj->dontneed) 806 mark_unpurgeable(msm_obj); 807 if (msm_obj->evictable) 808 mark_unevictable(msm_obj); 809 810 list_del(&msm_obj->mm_list); 811 if ((msm_obj->madv == MSM_MADV_WILLNEED) && msm_obj->sgt) { 812 list_add_tail(&msm_obj->mm_list, &priv->inactive_willneed); 813 mark_evictable(msm_obj); 814 } else if (msm_obj->madv == MSM_MADV_DONTNEED) { 815 list_add_tail(&msm_obj->mm_list, &priv->inactive_dontneed); 816 mark_purgeable(msm_obj); 817 } else { 818 GEM_WARN_ON((msm_obj->madv != __MSM_MADV_PURGED) && msm_obj->sgt); 819 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); 820 } 821 822 mutex_unlock(&priv->mm_lock); 823 } 824 825 int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 826 { 827 bool write = !!(op & MSM_PREP_WRITE); 828 unsigned long remain = 829 op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); 830 long ret; 831 832 ret = dma_resv_wait_timeout(obj->resv, write, true, remain); 833 if (ret == 0) 834 return remain == 0 ? -EBUSY : -ETIMEDOUT; 835 else if (ret < 0) 836 return ret; 837 838 /* TODO cache maintenance */ 839 840 return 0; 841 } 842 843 int msm_gem_cpu_fini(struct drm_gem_object *obj) 844 { 845 /* TODO cache maintenance */ 846 return 0; 847 } 848 849 #ifdef CONFIG_DEBUG_FS 850 void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m, 851 struct msm_gem_stats *stats) 852 { 853 struct msm_gem_object *msm_obj = to_msm_bo(obj); 854 struct dma_resv *robj = obj->resv; 855 struct msm_gem_vma *vma; 856 uint64_t off = drm_vma_node_start(&obj->vma_node); 857 const char *madv; 858 859 msm_gem_lock(obj); 860 861 stats->all.count++; 862 stats->all.size += obj->size; 863 864 if (is_active(msm_obj)) { 865 stats->active.count++; 866 stats->active.size += obj->size; 867 } 868 869 if (msm_obj->pages) { 870 stats->resident.count++; 871 stats->resident.size += obj->size; 872 } 873 874 switch (msm_obj->madv) { 875 case __MSM_MADV_PURGED: 876 stats->purged.count++; 877 stats->purged.size += obj->size; 878 madv = " purged"; 879 break; 880 case MSM_MADV_DONTNEED: 881 stats->purgeable.count++; 882 stats->purgeable.size += obj->size; 883 madv = " purgeable"; 884 break; 885 case MSM_MADV_WILLNEED: 886 default: 887 madv = ""; 888 break; 889 } 890 891 seq_printf(m, "%08x: %c %2d (%2d) %08llx %p", 892 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 893 obj->name, kref_read(&obj->refcount), 894 off, msm_obj->vaddr); 895 896 seq_printf(m, " %08zu %9s %-32s\n", obj->size, madv, msm_obj->name); 897 898 if (!list_empty(&msm_obj->vmas)) { 899 900 seq_puts(m, " vmas:"); 901 902 list_for_each_entry(vma, &msm_obj->vmas, list) { 903 const char *name, *comm; 904 if (vma->aspace) { 905 struct msm_gem_address_space *aspace = vma->aspace; 906 struct task_struct *task = 907 get_pid_task(aspace->pid, PIDTYPE_PID); 908 if (task) { 909 comm = kstrdup(task->comm, GFP_KERNEL); 910 } else { 911 comm = NULL; 912 } 913 name = aspace->name; 914 } else { 915 name = comm = NULL; 916 } 917 seq_printf(m, " [%s%s%s: aspace=%p, %08llx,%s,inuse=%d]", 918 name, comm ? ":" : "", comm ? comm : "", 919 vma->aspace, vma->iova, 920 vma->mapped ? "mapped" : "unmapped", 921 msm_gem_vma_inuse(vma)); 922 kfree(comm); 923 } 924 925 seq_puts(m, "\n"); 926 } 927 928 dma_resv_describe(robj, m); 929 msm_gem_unlock(obj); 930 } 931 932 void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 933 { 934 struct msm_gem_stats stats = {}; 935 struct msm_gem_object *msm_obj; 936 937 seq_puts(m, " flags id ref offset kaddr size madv name\n"); 938 list_for_each_entry(msm_obj, list, node) { 939 struct drm_gem_object *obj = &msm_obj->base; 940 seq_puts(m, " "); 941 msm_gem_describe(obj, m, &stats); 942 } 943 944 seq_printf(m, "Total: %4d objects, %9zu bytes\n", 945 stats.all.count, stats.all.size); 946 seq_printf(m, "Active: %4d objects, %9zu bytes\n", 947 stats.active.count, stats.active.size); 948 seq_printf(m, "Resident: %4d objects, %9zu bytes\n", 949 stats.resident.count, stats.resident.size); 950 seq_printf(m, "Purgeable: %4d objects, %9zu bytes\n", 951 stats.purgeable.count, stats.purgeable.size); 952 seq_printf(m, "Purged: %4d objects, %9zu bytes\n", 953 stats.purged.count, stats.purged.size); 954 } 955 #endif 956 957 /* don't call directly! Use drm_gem_object_put() */ 958 void msm_gem_free_object(struct drm_gem_object *obj) 959 { 960 struct msm_gem_object *msm_obj = to_msm_bo(obj); 961 struct drm_device *dev = obj->dev; 962 struct msm_drm_private *priv = dev->dev_private; 963 964 mutex_lock(&priv->obj_lock); 965 list_del(&msm_obj->node); 966 mutex_unlock(&priv->obj_lock); 967 968 mutex_lock(&priv->mm_lock); 969 if (msm_obj->dontneed) 970 mark_unpurgeable(msm_obj); 971 list_del(&msm_obj->mm_list); 972 mutex_unlock(&priv->mm_lock); 973 974 msm_gem_lock(obj); 975 976 /* object should not be on active list: */ 977 GEM_WARN_ON(is_active(msm_obj)); 978 979 put_iova_spaces(obj, true); 980 981 if (obj->import_attach) { 982 GEM_WARN_ON(msm_obj->vaddr); 983 984 /* Don't drop the pages for imported dmabuf, as they are not 985 * ours, just free the array we allocated: 986 */ 987 kvfree(msm_obj->pages); 988 989 put_iova_vmas(obj); 990 991 /* dma_buf_detach() grabs resv lock, so we need to unlock 992 * prior to drm_prime_gem_destroy 993 */ 994 msm_gem_unlock(obj); 995 996 drm_prime_gem_destroy(obj, msm_obj->sgt); 997 } else { 998 msm_gem_vunmap(obj); 999 put_pages(obj); 1000 put_iova_vmas(obj); 1001 msm_gem_unlock(obj); 1002 } 1003 1004 drm_gem_object_release(obj); 1005 1006 kfree(msm_obj); 1007 } 1008 1009 static int msm_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) 1010 { 1011 struct msm_gem_object *msm_obj = to_msm_bo(obj); 1012 1013 vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP; 1014 vma->vm_page_prot = msm_gem_pgprot(msm_obj, vm_get_page_prot(vma->vm_flags)); 1015 1016 return 0; 1017 } 1018 1019 /* convenience method to construct a GEM buffer object, and userspace handle */ 1020 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 1021 uint32_t size, uint32_t flags, uint32_t *handle, 1022 char *name) 1023 { 1024 struct drm_gem_object *obj; 1025 int ret; 1026 1027 obj = msm_gem_new(dev, size, flags); 1028 1029 if (IS_ERR(obj)) 1030 return PTR_ERR(obj); 1031 1032 if (name) 1033 msm_gem_object_set_name(obj, "%s", name); 1034 1035 ret = drm_gem_handle_create(file, obj, handle); 1036 1037 /* drop reference from allocate - handle holds it now */ 1038 drm_gem_object_put(obj); 1039 1040 return ret; 1041 } 1042 1043 static const struct vm_operations_struct vm_ops = { 1044 .fault = msm_gem_fault, 1045 .open = drm_gem_vm_open, 1046 .close = drm_gem_vm_close, 1047 }; 1048 1049 static const struct drm_gem_object_funcs msm_gem_object_funcs = { 1050 .free = msm_gem_free_object, 1051 .pin = msm_gem_prime_pin, 1052 .unpin = msm_gem_prime_unpin, 1053 .get_sg_table = msm_gem_prime_get_sg_table, 1054 .vmap = msm_gem_prime_vmap, 1055 .vunmap = msm_gem_prime_vunmap, 1056 .mmap = msm_gem_object_mmap, 1057 .vm_ops = &vm_ops, 1058 }; 1059 1060 static int msm_gem_new_impl(struct drm_device *dev, 1061 uint32_t size, uint32_t flags, 1062 struct drm_gem_object **obj) 1063 { 1064 struct msm_drm_private *priv = dev->dev_private; 1065 struct msm_gem_object *msm_obj; 1066 1067 switch (flags & MSM_BO_CACHE_MASK) { 1068 case MSM_BO_UNCACHED: 1069 case MSM_BO_CACHED: 1070 case MSM_BO_WC: 1071 break; 1072 case MSM_BO_CACHED_COHERENT: 1073 if (priv->has_cached_coherent) 1074 break; 1075 fallthrough; 1076 default: 1077 DRM_DEV_DEBUG(dev->dev, "invalid cache flag: %x\n", 1078 (flags & MSM_BO_CACHE_MASK)); 1079 return -EINVAL; 1080 } 1081 1082 msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 1083 if (!msm_obj) 1084 return -ENOMEM; 1085 1086 msm_obj->flags = flags; 1087 msm_obj->madv = MSM_MADV_WILLNEED; 1088 1089 INIT_LIST_HEAD(&msm_obj->node); 1090 INIT_LIST_HEAD(&msm_obj->vmas); 1091 1092 *obj = &msm_obj->base; 1093 (*obj)->funcs = &msm_gem_object_funcs; 1094 1095 return 0; 1096 } 1097 1098 struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32_t flags) 1099 { 1100 struct msm_drm_private *priv = dev->dev_private; 1101 struct msm_gem_object *msm_obj; 1102 struct drm_gem_object *obj = NULL; 1103 bool use_vram = false; 1104 int ret; 1105 1106 size = PAGE_ALIGN(size); 1107 1108 if (!msm_use_mmu(dev)) 1109 use_vram = true; 1110 else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && priv->vram.size) 1111 use_vram = true; 1112 1113 if (GEM_WARN_ON(use_vram && !priv->vram.size)) 1114 return ERR_PTR(-EINVAL); 1115 1116 /* Disallow zero sized objects as they make the underlying 1117 * infrastructure grumpy 1118 */ 1119 if (size == 0) 1120 return ERR_PTR(-EINVAL); 1121 1122 ret = msm_gem_new_impl(dev, size, flags, &obj); 1123 if (ret) 1124 return ERR_PTR(ret); 1125 1126 msm_obj = to_msm_bo(obj); 1127 1128 if (use_vram) { 1129 struct msm_gem_vma *vma; 1130 struct page **pages; 1131 1132 drm_gem_private_object_init(dev, obj, size); 1133 1134 msm_gem_lock(obj); 1135 1136 vma = add_vma(obj, NULL); 1137 msm_gem_unlock(obj); 1138 if (IS_ERR(vma)) { 1139 ret = PTR_ERR(vma); 1140 goto fail; 1141 } 1142 1143 to_msm_bo(obj)->vram_node = &vma->node; 1144 1145 /* Call chain get_pages() -> update_inactive() tries to 1146 * access msm_obj->mm_list, but it is not initialized yet. 1147 * To avoid NULL pointer dereference error, initialize 1148 * mm_list to be empty. 1149 */ 1150 INIT_LIST_HEAD(&msm_obj->mm_list); 1151 1152 msm_gem_lock(obj); 1153 pages = get_pages(obj); 1154 msm_gem_unlock(obj); 1155 if (IS_ERR(pages)) { 1156 ret = PTR_ERR(pages); 1157 goto fail; 1158 } 1159 1160 vma->iova = physaddr(obj); 1161 } else { 1162 ret = drm_gem_object_init(dev, obj, size); 1163 if (ret) 1164 goto fail; 1165 /* 1166 * Our buffers are kept pinned, so allocating them from the 1167 * MOVABLE zone is a really bad idea, and conflicts with CMA. 1168 * See comments above new_inode() why this is required _and_ 1169 * expected if you're going to pin these pages. 1170 */ 1171 mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER); 1172 } 1173 1174 mutex_lock(&priv->mm_lock); 1175 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); 1176 mutex_unlock(&priv->mm_lock); 1177 1178 mutex_lock(&priv->obj_lock); 1179 list_add_tail(&msm_obj->node, &priv->objects); 1180 mutex_unlock(&priv->obj_lock); 1181 1182 return obj; 1183 1184 fail: 1185 drm_gem_object_put(obj); 1186 return ERR_PTR(ret); 1187 } 1188 1189 struct drm_gem_object *msm_gem_import(struct drm_device *dev, 1190 struct dma_buf *dmabuf, struct sg_table *sgt) 1191 { 1192 struct msm_drm_private *priv = dev->dev_private; 1193 struct msm_gem_object *msm_obj; 1194 struct drm_gem_object *obj; 1195 uint32_t size; 1196 int ret, npages; 1197 1198 /* if we don't have IOMMU, don't bother pretending we can import: */ 1199 if (!msm_use_mmu(dev)) { 1200 DRM_DEV_ERROR(dev->dev, "cannot import without IOMMU\n"); 1201 return ERR_PTR(-EINVAL); 1202 } 1203 1204 size = PAGE_ALIGN(dmabuf->size); 1205 1206 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); 1207 if (ret) 1208 return ERR_PTR(ret); 1209 1210 drm_gem_private_object_init(dev, obj, size); 1211 1212 npages = size / PAGE_SIZE; 1213 1214 msm_obj = to_msm_bo(obj); 1215 msm_gem_lock(obj); 1216 msm_obj->sgt = sgt; 1217 msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 1218 if (!msm_obj->pages) { 1219 msm_gem_unlock(obj); 1220 ret = -ENOMEM; 1221 goto fail; 1222 } 1223 1224 ret = drm_prime_sg_to_page_array(sgt, msm_obj->pages, npages); 1225 if (ret) { 1226 msm_gem_unlock(obj); 1227 goto fail; 1228 } 1229 1230 msm_gem_unlock(obj); 1231 1232 mutex_lock(&priv->mm_lock); 1233 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); 1234 mutex_unlock(&priv->mm_lock); 1235 1236 mutex_lock(&priv->obj_lock); 1237 list_add_tail(&msm_obj->node, &priv->objects); 1238 mutex_unlock(&priv->obj_lock); 1239 1240 return obj; 1241 1242 fail: 1243 drm_gem_object_put(obj); 1244 return ERR_PTR(ret); 1245 } 1246 1247 void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size, 1248 uint32_t flags, struct msm_gem_address_space *aspace, 1249 struct drm_gem_object **bo, uint64_t *iova) 1250 { 1251 void *vaddr; 1252 struct drm_gem_object *obj = msm_gem_new(dev, size, flags); 1253 int ret; 1254 1255 if (IS_ERR(obj)) 1256 return ERR_CAST(obj); 1257 1258 if (iova) { 1259 ret = msm_gem_get_and_pin_iova(obj, aspace, iova); 1260 if (ret) 1261 goto err; 1262 } 1263 1264 vaddr = msm_gem_get_vaddr(obj); 1265 if (IS_ERR(vaddr)) { 1266 msm_gem_unpin_iova(obj, aspace); 1267 ret = PTR_ERR(vaddr); 1268 goto err; 1269 } 1270 1271 if (bo) 1272 *bo = obj; 1273 1274 return vaddr; 1275 err: 1276 drm_gem_object_put(obj); 1277 1278 return ERR_PTR(ret); 1279 1280 } 1281 1282 void msm_gem_kernel_put(struct drm_gem_object *bo, 1283 struct msm_gem_address_space *aspace) 1284 { 1285 if (IS_ERR_OR_NULL(bo)) 1286 return; 1287 1288 msm_gem_put_vaddr(bo); 1289 msm_gem_unpin_iova(bo, aspace); 1290 drm_gem_object_put(bo); 1291 } 1292 1293 void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...) 1294 { 1295 struct msm_gem_object *msm_obj = to_msm_bo(bo); 1296 va_list ap; 1297 1298 if (!fmt) 1299 return; 1300 1301 va_start(ap, fmt); 1302 vsnprintf(msm_obj->name, sizeof(msm_obj->name), fmt, ap); 1303 va_end(ap); 1304 } 1305