1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 2015-2018 Etnaviv Project 4 */ 5 6#include <drm/drm_prime.h> 7#include <linux/dma-mapping.h> 8#include <linux/shmem_fs.h> 9#include <linux/spinlock.h> 10#include <linux/vmalloc.h> 11 12#include "etnaviv_drv.h" 13#include "etnaviv_gem.h" 14#include "etnaviv_gpu.h" 15#include "etnaviv_mmu.h" 16 17static struct lock_class_key etnaviv_shm_lock_class; 18static struct lock_class_key etnaviv_userptr_lock_class; 19 20static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj) 21{ 22 struct drm_device *dev = etnaviv_obj->base.dev; 23 struct sg_table *sgt = etnaviv_obj->sgt; 24 25 /* 26 * For non-cached buffers, ensure the new pages are clean 27 * because display controller, GPU, etc. are not coherent. 28 */ 29 if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) 30 dma_map_sgtable(dev->dev, sgt, DMA_BIDIRECTIONAL, 0); 31} 32 33static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj) 34{ 35 struct drm_device *dev = etnaviv_obj->base.dev; 36 struct sg_table *sgt = etnaviv_obj->sgt; 37 38 /* 39 * For non-cached buffers, ensure the new pages are clean 40 * because display controller, GPU, etc. are not coherent: 41 * 42 * WARNING: The DMA API does not support concurrent CPU 43 * and device access to the memory area. With BIDIRECTIONAL, 44 * we will clean the cache lines which overlap the region, 45 * and invalidate all cache lines (partially) contained in 46 * the region. 47 * 48 * If you have dirty data in the overlapping cache lines, 49 * that will corrupt the GPU-written data. If you have 50 * written into the remainder of the region, this can 51 * discard those writes. 52 */ 53 if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) 54 dma_unmap_sgtable(dev->dev, sgt, DMA_BIDIRECTIONAL, 0); 55} 56 57/* called with etnaviv_obj->lock held */ 58static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj) 59{ 60 struct drm_device *dev = etnaviv_obj->base.dev; 61 struct page **p = drm_gem_get_pages(&etnaviv_obj->base); 62 63 if (IS_ERR(p)) { 64 dev_dbg(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); 65 return PTR_ERR(p); 66 } 67 68 etnaviv_obj->pages = p; 69 70 return 0; 71} 72 73static void put_pages(struct etnaviv_gem_object *etnaviv_obj) 74{ 75 if (etnaviv_obj->sgt) { 76 etnaviv_gem_scatterlist_unmap(etnaviv_obj); 77 sg_free_table(etnaviv_obj->sgt); 78 kfree(etnaviv_obj->sgt); 79 etnaviv_obj->sgt = NULL; 80 } 81 if (etnaviv_obj->pages) { 82 drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages, 83 true, false); 84 85 etnaviv_obj->pages = NULL; 86 } 87} 88 89struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) 90{ 91 int ret; 92 93 lockdep_assert_held(&etnaviv_obj->lock); 94 95 if (!etnaviv_obj->pages) { 96 ret = etnaviv_obj->ops->get_pages(etnaviv_obj); 97 if (ret < 0) 98 return ERR_PTR(ret); 99 } 100 101 if (!etnaviv_obj->sgt) { 102 struct drm_device *dev = etnaviv_obj->base.dev; 103 int npages = etnaviv_obj->base.size >> PAGE_SHIFT; 104 struct sg_table *sgt; 105 106 sgt = drm_prime_pages_to_sg(etnaviv_obj->base.dev, 107 etnaviv_obj->pages, npages); 108 if (IS_ERR(sgt)) { 109 dev_err(dev->dev, "failed to allocate sgt: %ld\n", 110 PTR_ERR(sgt)); 111 return ERR_CAST(sgt); 112 } 113 114 etnaviv_obj->sgt = sgt; 115 116 etnaviv_gem_scatter_map(etnaviv_obj); 117 } 118 119 return etnaviv_obj->pages; 120} 121 122void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj) 123{ 124 lockdep_assert_held(&etnaviv_obj->lock); 125 /* when we start tracking the pin count, then do something here */ 126} 127 128static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, 129 struct vm_area_struct *vma) 130{ 131 pgprot_t vm_page_prot; 132 133 vm_flags_set(vma, VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP); 134 135 vm_page_prot = vm_get_page_prot(vma->vm_flags); 136 137 if (etnaviv_obj->flags & ETNA_BO_WC) { 138 vma->vm_page_prot = pgprot_writecombine(vm_page_prot); 139 } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { 140 vma->vm_page_prot = pgprot_noncached(vm_page_prot); 141 } else { 142 /* 143 * Shunt off cached objs to shmem file so they have their own 144 * address_space (so unmap_mapping_range does what we want, 145 * in particular in the case of mmap'd dmabufs) 146 */ 147 vma->vm_pgoff = 0; 148 vma_set_file(vma, etnaviv_obj->base.filp); 149 150 vma->vm_page_prot = vm_page_prot; 151 } 152 153 return 0; 154} 155 156static int etnaviv_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) 157{ 158 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 159 160 return etnaviv_obj->ops->mmap(etnaviv_obj, vma); 161} 162 163static vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf) 164{ 165 struct vm_area_struct *vma = vmf->vma; 166 struct drm_gem_object *obj = vma->vm_private_data; 167 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 168 struct page **pages; 169 unsigned long pfn; 170 pgoff_t pgoff; 171 int err; 172 173 /* 174 * Make sure we don't parallel update on a fault, nor move or remove 175 * something from beneath our feet. Note that vmf_insert_page() is 176 * specifically coded to take care of this, so we don't have to. 177 */ 178 err = mutex_lock_interruptible(&etnaviv_obj->lock); 179 if (err) 180 return VM_FAULT_NOPAGE; 181 /* make sure we have pages attached now */ 182 pages = etnaviv_gem_get_pages(etnaviv_obj); 183 mutex_unlock(&etnaviv_obj->lock); 184 185 if (IS_ERR(pages)) { 186 err = PTR_ERR(pages); 187 return vmf_error(err); 188 } 189 190 /* We don't use vmf->pgoff since that has the fake offset: */ 191 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 192 193 pfn = page_to_pfn(pages[pgoff]); 194 195 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 196 pfn, pfn << PAGE_SHIFT); 197 198 return vmf_insert_pfn(vma, vmf->address, pfn); 199} 200 201int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) 202{ 203 int ret; 204 205 /* Make it mmapable */ 206 ret = drm_gem_create_mmap_offset(obj); 207 if (ret) 208 dev_err(obj->dev->dev, "could not allocate mmap offset\n"); 209 else 210 *offset = drm_vma_node_offset_addr(&obj->vma_node); 211 212 return ret; 213} 214 215static struct etnaviv_vram_mapping * 216etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, 217 struct etnaviv_iommu_context *context) 218{ 219 struct etnaviv_vram_mapping *mapping; 220 221 list_for_each_entry(mapping, &obj->vram_list, obj_node) { 222 if (mapping->context == context) 223 return mapping; 224 } 225 226 return NULL; 227} 228 229void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) 230{ 231 struct etnaviv_gem_object *etnaviv_obj = mapping->object; 232 233 mutex_lock(&etnaviv_obj->lock); 234 WARN_ON(mapping->use == 0); 235 mapping->use -= 1; 236 mutex_unlock(&etnaviv_obj->lock); 237 238 drm_gem_object_put(&etnaviv_obj->base); 239} 240 241struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( 242 struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context, 243 u64 va) 244{ 245 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 246 struct etnaviv_vram_mapping *mapping; 247 struct page **pages; 248 int ret = 0; 249 250 mutex_lock(&etnaviv_obj->lock); 251 mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, mmu_context); 252 if (mapping) { 253 /* 254 * Holding the object lock prevents the use count changing 255 * beneath us. If the use count is zero, the MMU might be 256 * reaping this object, so take the lock and re-check that 257 * the MMU owns this mapping to close this race. 258 */ 259 if (mapping->use == 0) { 260 mutex_lock(&mmu_context->lock); 261 if (mapping->context == mmu_context) 262 if (va && mapping->iova != va) { 263 etnaviv_iommu_reap_mapping(mapping); 264 mapping = NULL; 265 } else { 266 mapping->use += 1; 267 } 268 else 269 mapping = NULL; 270 mutex_unlock(&mmu_context->lock); 271 if (mapping) 272 goto out; 273 } else { 274 mapping->use += 1; 275 goto out; 276 } 277 } 278 279 pages = etnaviv_gem_get_pages(etnaviv_obj); 280 if (IS_ERR(pages)) { 281 ret = PTR_ERR(pages); 282 goto out; 283 } 284 285 /* 286 * See if we have a reaped vram mapping we can re-use before 287 * allocating a fresh mapping. 288 */ 289 mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); 290 if (!mapping) { 291 mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); 292 if (!mapping) { 293 ret = -ENOMEM; 294 goto out; 295 } 296 297 INIT_LIST_HEAD(&mapping->scan_node); 298 mapping->object = etnaviv_obj; 299 } else { 300 list_del(&mapping->obj_node); 301 } 302 303 mapping->use = 1; 304 305 ret = etnaviv_iommu_map_gem(mmu_context, etnaviv_obj, 306 mmu_context->global->memory_base, 307 mapping, va); 308 if (ret < 0) 309 kfree(mapping); 310 else 311 list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); 312 313out: 314 mutex_unlock(&etnaviv_obj->lock); 315 316 if (ret) 317 return ERR_PTR(ret); 318 319 /* Take a reference on the object */ 320 drm_gem_object_get(obj); 321 return mapping; 322} 323 324void *etnaviv_gem_vmap(struct drm_gem_object *obj) 325{ 326 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 327 328 if (etnaviv_obj->vaddr) 329 return etnaviv_obj->vaddr; 330 331 mutex_lock(&etnaviv_obj->lock); 332 /* 333 * Need to check again, as we might have raced with another thread 334 * while waiting for the mutex. 335 */ 336 if (!etnaviv_obj->vaddr) 337 etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); 338 mutex_unlock(&etnaviv_obj->lock); 339 340 return etnaviv_obj->vaddr; 341} 342 343static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) 344{ 345 struct page **pages; 346 347 lockdep_assert_held(&obj->lock); 348 349 pages = etnaviv_gem_get_pages(obj); 350 if (IS_ERR(pages)) 351 return NULL; 352 353 return vmap(pages, obj->base.size >> PAGE_SHIFT, 354 VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 355} 356 357static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) 358{ 359 if (op & ETNA_PREP_READ) 360 return DMA_FROM_DEVICE; 361 else if (op & ETNA_PREP_WRITE) 362 return DMA_TO_DEVICE; 363 else 364 return DMA_BIDIRECTIONAL; 365} 366 367int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, 368 struct drm_etnaviv_timespec *timeout) 369{ 370 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 371 struct drm_device *dev = obj->dev; 372 bool write = !!(op & ETNA_PREP_WRITE); 373 int ret; 374 375 if (!etnaviv_obj->sgt) { 376 void *ret; 377 378 mutex_lock(&etnaviv_obj->lock); 379 ret = etnaviv_gem_get_pages(etnaviv_obj); 380 mutex_unlock(&etnaviv_obj->lock); 381 if (IS_ERR(ret)) 382 return PTR_ERR(ret); 383 } 384 385 if (op & ETNA_PREP_NOSYNC) { 386 if (!dma_resv_test_signaled(obj->resv, 387 dma_resv_usage_rw(write))) 388 return -EBUSY; 389 } else { 390 unsigned long remain = etnaviv_timeout_to_jiffies(timeout); 391 392 ret = dma_resv_wait_timeout(obj->resv, dma_resv_usage_rw(write), 393 true, remain); 394 if (ret <= 0) 395 return ret == 0 ? -ETIMEDOUT : ret; 396 } 397 398 if (etnaviv_obj->flags & ETNA_BO_CACHED) { 399 dma_sync_sgtable_for_cpu(dev->dev, etnaviv_obj->sgt, 400 etnaviv_op_to_dma_dir(op)); 401 etnaviv_obj->last_cpu_prep_op = op; 402 } 403 404 return 0; 405} 406 407int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) 408{ 409 struct drm_device *dev = obj->dev; 410 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 411 412 if (etnaviv_obj->flags & ETNA_BO_CACHED) { 413 /* fini without a prep is almost certainly a userspace error */ 414 WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); 415 dma_sync_sgtable_for_device(dev->dev, etnaviv_obj->sgt, 416 etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); 417 etnaviv_obj->last_cpu_prep_op = 0; 418 } 419 420 return 0; 421} 422 423int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, 424 struct drm_etnaviv_timespec *timeout) 425{ 426 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 427 428 return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); 429} 430 431#ifdef CONFIG_DEBUG_FS 432static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 433{ 434 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 435 struct dma_resv *robj = obj->resv; 436 unsigned long off = drm_vma_node_start(&obj->vma_node); 437 int r; 438 439 seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", 440 etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', 441 obj->name, kref_read(&obj->refcount), 442 off, etnaviv_obj->vaddr, obj->size); 443 444 r = dma_resv_lock(robj, NULL); 445 if (r) 446 return; 447 448 dma_resv_describe(robj, m); 449 dma_resv_unlock(robj); 450} 451 452void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, 453 struct seq_file *m) 454{ 455 struct etnaviv_gem_object *etnaviv_obj; 456 int count = 0; 457 size_t size = 0; 458 459 mutex_lock(&priv->gem_lock); 460 list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { 461 struct drm_gem_object *obj = &etnaviv_obj->base; 462 463 seq_puts(m, " "); 464 etnaviv_gem_describe(obj, m); 465 count++; 466 size += obj->size; 467 } 468 mutex_unlock(&priv->gem_lock); 469 470 seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 471} 472#endif 473 474static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) 475{ 476 vunmap(etnaviv_obj->vaddr); 477 put_pages(etnaviv_obj); 478} 479 480static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { 481 .get_pages = etnaviv_gem_shmem_get_pages, 482 .release = etnaviv_gem_shmem_release, 483 .vmap = etnaviv_gem_vmap_impl, 484 .mmap = etnaviv_gem_mmap_obj, 485}; 486 487void etnaviv_gem_free_object(struct drm_gem_object *obj) 488{ 489 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 490 struct etnaviv_drm_private *priv = obj->dev->dev_private; 491 struct etnaviv_vram_mapping *mapping, *tmp; 492 493 /* object should not be active */ 494 WARN_ON(is_active(etnaviv_obj)); 495 496 mutex_lock(&priv->gem_lock); 497 list_del(&etnaviv_obj->gem_node); 498 mutex_unlock(&priv->gem_lock); 499 500 list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, 501 obj_node) { 502 struct etnaviv_iommu_context *context = mapping->context; 503 504 WARN_ON(mapping->use); 505 506 if (context) 507 etnaviv_iommu_unmap_gem(context, mapping); 508 509 list_del(&mapping->obj_node); 510 kfree(mapping); 511 } 512 513 etnaviv_obj->ops->release(etnaviv_obj); 514 drm_gem_object_release(obj); 515 516 kfree(etnaviv_obj); 517} 518 519void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) 520{ 521 struct etnaviv_drm_private *priv = dev->dev_private; 522 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 523 524 mutex_lock(&priv->gem_lock); 525 list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); 526 mutex_unlock(&priv->gem_lock); 527} 528 529static const struct vm_operations_struct vm_ops = { 530 .fault = etnaviv_gem_fault, 531 .open = drm_gem_vm_open, 532 .close = drm_gem_vm_close, 533}; 534 535static const struct drm_gem_object_funcs etnaviv_gem_object_funcs = { 536 .free = etnaviv_gem_free_object, 537 .pin = etnaviv_gem_prime_pin, 538 .unpin = etnaviv_gem_prime_unpin, 539 .get_sg_table = etnaviv_gem_prime_get_sg_table, 540 .vmap = etnaviv_gem_prime_vmap, 541 .mmap = etnaviv_gem_mmap, 542 .vm_ops = &vm_ops, 543}; 544 545static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, 546 const struct etnaviv_gem_ops *ops, struct drm_gem_object **obj) 547{ 548 struct etnaviv_gem_object *etnaviv_obj; 549 unsigned sz = sizeof(*etnaviv_obj); 550 bool valid = true; 551 552 /* validate flags */ 553 switch (flags & ETNA_BO_CACHE_MASK) { 554 case ETNA_BO_UNCACHED: 555 case ETNA_BO_CACHED: 556 case ETNA_BO_WC: 557 break; 558 default: 559 valid = false; 560 } 561 562 if (!valid) { 563 dev_err(dev->dev, "invalid cache flag: %x\n", 564 (flags & ETNA_BO_CACHE_MASK)); 565 return -EINVAL; 566 } 567 568 etnaviv_obj = kzalloc(sz, GFP_KERNEL); 569 if (!etnaviv_obj) 570 return -ENOMEM; 571 572 etnaviv_obj->flags = flags; 573 etnaviv_obj->ops = ops; 574 575 mutex_init(&etnaviv_obj->lock); 576 INIT_LIST_HEAD(&etnaviv_obj->vram_list); 577 578 *obj = &etnaviv_obj->base; 579 (*obj)->funcs = &etnaviv_gem_object_funcs; 580 581 return 0; 582} 583 584/* convenience method to construct a GEM buffer object, and userspace handle */ 585int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, 586 u32 size, u32 flags, u32 *handle) 587{ 588 struct etnaviv_drm_private *priv = dev->dev_private; 589 struct drm_gem_object *obj = NULL; 590 int ret; 591 592 size = PAGE_ALIGN(size); 593 594 ret = etnaviv_gem_new_impl(dev, size, flags, 595 &etnaviv_gem_shmem_ops, &obj); 596 if (ret) 597 goto fail; 598 599 lockdep_set_class(&to_etnaviv_bo(obj)->lock, &etnaviv_shm_lock_class); 600 601 ret = drm_gem_object_init(dev, obj, size); 602 if (ret) 603 goto fail; 604 605 /* 606 * Our buffers are kept pinned, so allocating them from the MOVABLE 607 * zone is a really bad idea, and conflicts with CMA. See comments 608 * above new_inode() why this is required _and_ expected if you're 609 * going to pin these pages. 610 */ 611 mapping_set_gfp_mask(obj->filp->f_mapping, priv->shm_gfp_mask); 612 613 etnaviv_gem_obj_add(dev, obj); 614 615 ret = drm_gem_handle_create(file, obj, handle); 616 617 /* drop reference from allocate - handle holds it now */ 618fail: 619 drm_gem_object_put(obj); 620 621 return ret; 622} 623 624int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, 625 const struct etnaviv_gem_ops *ops, struct etnaviv_gem_object **res) 626{ 627 struct drm_gem_object *obj; 628 int ret; 629 630 ret = etnaviv_gem_new_impl(dev, size, flags, ops, &obj); 631 if (ret) 632 return ret; 633 634 drm_gem_private_object_init(dev, obj, size); 635 636 *res = to_etnaviv_bo(obj); 637 638 return 0; 639} 640 641static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) 642{ 643 struct page **pvec = NULL; 644 struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr; 645 int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT; 646 unsigned int gup_flags = FOLL_LONGTERM; 647 648 might_lock_read(¤t->mm->mmap_lock); 649 650 if (userptr->mm != current->mm) 651 return -EPERM; 652 653 pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 654 if (!pvec) 655 return -ENOMEM; 656 657 if (!userptr->ro) 658 gup_flags |= FOLL_WRITE; 659 660 do { 661 unsigned num_pages = npages - pinned; 662 uint64_t ptr = userptr->ptr + pinned * PAGE_SIZE; 663 struct page **pages = pvec + pinned; 664 665 ret = pin_user_pages_fast(ptr, num_pages, gup_flags, pages); 666 if (ret < 0) { 667 unpin_user_pages(pvec, pinned); 668 kvfree(pvec); 669 return ret; 670 } 671 672 pinned += ret; 673 674 } while (pinned < npages); 675 676 etnaviv_obj->pages = pvec; 677 678 return 0; 679} 680 681static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) 682{ 683 if (etnaviv_obj->sgt) { 684 etnaviv_gem_scatterlist_unmap(etnaviv_obj); 685 sg_free_table(etnaviv_obj->sgt); 686 kfree(etnaviv_obj->sgt); 687 } 688 if (etnaviv_obj->pages) { 689 int npages = etnaviv_obj->base.size >> PAGE_SHIFT; 690 691 unpin_user_pages(etnaviv_obj->pages, npages); 692 kvfree(etnaviv_obj->pages); 693 } 694} 695 696static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, 697 struct vm_area_struct *vma) 698{ 699 return -EINVAL; 700} 701 702static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { 703 .get_pages = etnaviv_gem_userptr_get_pages, 704 .release = etnaviv_gem_userptr_release, 705 .vmap = etnaviv_gem_vmap_impl, 706 .mmap = etnaviv_gem_userptr_mmap_obj, 707}; 708 709int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, 710 uintptr_t ptr, u32 size, u32 flags, u32 *handle) 711{ 712 struct etnaviv_gem_object *etnaviv_obj; 713 int ret; 714 715 ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, 716 &etnaviv_gem_userptr_ops, &etnaviv_obj); 717 if (ret) 718 return ret; 719 720 lockdep_set_class(&etnaviv_obj->lock, &etnaviv_userptr_lock_class); 721 722 etnaviv_obj->userptr.ptr = ptr; 723 etnaviv_obj->userptr.mm = current->mm; 724 etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); 725 726 etnaviv_gem_obj_add(dev, &etnaviv_obj->base); 727 728 ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); 729 730 /* drop reference from allocate - handle holds it now */ 731 drm_gem_object_put(&etnaviv_obj->base); 732 return ret; 733} 734