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 vma->vm_flags &= ~VM_PFNMAP; 134 vma->vm_flags |= VM_MIXEDMAP; 135 136 vm_page_prot = vm_get_page_prot(vma->vm_flags); 137 138 if (etnaviv_obj->flags & ETNA_BO_WC) { 139 vma->vm_page_prot = pgprot_writecombine(vm_page_prot); 140 } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { 141 vma->vm_page_prot = pgprot_noncached(vm_page_prot); 142 } else { 143 /* 144 * Shunt off cached objs to shmem file so they have their own 145 * address_space (so unmap_mapping_range does what we want, 146 * in particular in the case of mmap'd dmabufs) 147 */ 148 fput(vma->vm_file); 149 get_file(etnaviv_obj->base.filp); 150 vma->vm_pgoff = 0; 151 vma->vm_file = etnaviv_obj->base.filp; 152 153 vma->vm_page_prot = vm_page_prot; 154 } 155 156 return 0; 157} 158 159int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma) 160{ 161 struct etnaviv_gem_object *obj; 162 int ret; 163 164 ret = drm_gem_mmap(filp, vma); 165 if (ret) { 166 DBG("mmap failed: %d", ret); 167 return ret; 168 } 169 170 obj = to_etnaviv_bo(vma->vm_private_data); 171 return obj->ops->mmap(obj, vma); 172} 173 174vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf) 175{ 176 struct vm_area_struct *vma = vmf->vma; 177 struct drm_gem_object *obj = vma->vm_private_data; 178 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 179 struct page **pages, *page; 180 pgoff_t pgoff; 181 int err; 182 183 /* 184 * Make sure we don't parallel update on a fault, nor move or remove 185 * something from beneath our feet. Note that vmf_insert_page() is 186 * specifically coded to take care of this, so we don't have to. 187 */ 188 err = mutex_lock_interruptible(&etnaviv_obj->lock); 189 if (err) 190 return VM_FAULT_NOPAGE; 191 /* make sure we have pages attached now */ 192 pages = etnaviv_gem_get_pages(etnaviv_obj); 193 mutex_unlock(&etnaviv_obj->lock); 194 195 if (IS_ERR(pages)) { 196 err = PTR_ERR(pages); 197 return vmf_error(err); 198 } 199 200 /* We don't use vmf->pgoff since that has the fake offset: */ 201 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 202 203 page = pages[pgoff]; 204 205 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 206 page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT); 207 208 return vmf_insert_page(vma, vmf->address, page); 209} 210 211int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) 212{ 213 int ret; 214 215 /* Make it mmapable */ 216 ret = drm_gem_create_mmap_offset(obj); 217 if (ret) 218 dev_err(obj->dev->dev, "could not allocate mmap offset\n"); 219 else 220 *offset = drm_vma_node_offset_addr(&obj->vma_node); 221 222 return ret; 223} 224 225static struct etnaviv_vram_mapping * 226etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, 227 struct etnaviv_iommu_context *context) 228{ 229 struct etnaviv_vram_mapping *mapping; 230 231 list_for_each_entry(mapping, &obj->vram_list, obj_node) { 232 if (mapping->context == context) 233 return mapping; 234 } 235 236 return NULL; 237} 238 239void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) 240{ 241 struct etnaviv_gem_object *etnaviv_obj = mapping->object; 242 243 mutex_lock(&etnaviv_obj->lock); 244 WARN_ON(mapping->use == 0); 245 mapping->use -= 1; 246 mutex_unlock(&etnaviv_obj->lock); 247 248 drm_gem_object_put(&etnaviv_obj->base); 249} 250 251struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( 252 struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context, 253 u64 va) 254{ 255 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 256 struct etnaviv_vram_mapping *mapping; 257 struct page **pages; 258 int ret = 0; 259 260 mutex_lock(&etnaviv_obj->lock); 261 mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, mmu_context); 262 if (mapping) { 263 /* 264 * Holding the object lock prevents the use count changing 265 * beneath us. If the use count is zero, the MMU might be 266 * reaping this object, so take the lock and re-check that 267 * the MMU owns this mapping to close this race. 268 */ 269 if (mapping->use == 0) { 270 mutex_lock(&mmu_context->lock); 271 if (mapping->context == mmu_context) 272 mapping->use += 1; 273 else 274 mapping = NULL; 275 mutex_unlock(&mmu_context->lock); 276 if (mapping) 277 goto out; 278 } else { 279 mapping->use += 1; 280 goto out; 281 } 282 } 283 284 pages = etnaviv_gem_get_pages(etnaviv_obj); 285 if (IS_ERR(pages)) { 286 ret = PTR_ERR(pages); 287 goto out; 288 } 289 290 /* 291 * See if we have a reaped vram mapping we can re-use before 292 * allocating a fresh mapping. 293 */ 294 mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); 295 if (!mapping) { 296 mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); 297 if (!mapping) { 298 ret = -ENOMEM; 299 goto out; 300 } 301 302 INIT_LIST_HEAD(&mapping->scan_node); 303 mapping->object = etnaviv_obj; 304 } else { 305 list_del(&mapping->obj_node); 306 } 307 308 mapping->context = etnaviv_iommu_context_get(mmu_context); 309 mapping->use = 1; 310 311 ret = etnaviv_iommu_map_gem(mmu_context, etnaviv_obj, 312 mmu_context->global->memory_base, 313 mapping, va); 314 if (ret < 0) { 315 etnaviv_iommu_context_put(mmu_context); 316 kfree(mapping); 317 } else { 318 list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); 319 } 320 321out: 322 mutex_unlock(&etnaviv_obj->lock); 323 324 if (ret) 325 return ERR_PTR(ret); 326 327 /* Take a reference on the object */ 328 drm_gem_object_get(obj); 329 return mapping; 330} 331 332void *etnaviv_gem_vmap(struct drm_gem_object *obj) 333{ 334 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 335 336 if (etnaviv_obj->vaddr) 337 return etnaviv_obj->vaddr; 338 339 mutex_lock(&etnaviv_obj->lock); 340 /* 341 * Need to check again, as we might have raced with another thread 342 * while waiting for the mutex. 343 */ 344 if (!etnaviv_obj->vaddr) 345 etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); 346 mutex_unlock(&etnaviv_obj->lock); 347 348 return etnaviv_obj->vaddr; 349} 350 351static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) 352{ 353 struct page **pages; 354 355 lockdep_assert_held(&obj->lock); 356 357 pages = etnaviv_gem_get_pages(obj); 358 if (IS_ERR(pages)) 359 return NULL; 360 361 return vmap(pages, obj->base.size >> PAGE_SHIFT, 362 VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 363} 364 365static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) 366{ 367 if (op & ETNA_PREP_READ) 368 return DMA_FROM_DEVICE; 369 else if (op & ETNA_PREP_WRITE) 370 return DMA_TO_DEVICE; 371 else 372 return DMA_BIDIRECTIONAL; 373} 374 375int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, 376 struct drm_etnaviv_timespec *timeout) 377{ 378 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 379 struct drm_device *dev = obj->dev; 380 bool write = !!(op & ETNA_PREP_WRITE); 381 int ret; 382 383 if (!etnaviv_obj->sgt) { 384 void *ret; 385 386 mutex_lock(&etnaviv_obj->lock); 387 ret = etnaviv_gem_get_pages(etnaviv_obj); 388 mutex_unlock(&etnaviv_obj->lock); 389 if (IS_ERR(ret)) 390 return PTR_ERR(ret); 391 } 392 393 if (op & ETNA_PREP_NOSYNC) { 394 if (!dma_resv_test_signaled_rcu(obj->resv, 395 write)) 396 return -EBUSY; 397 } else { 398 unsigned long remain = etnaviv_timeout_to_jiffies(timeout); 399 400 ret = dma_resv_wait_timeout_rcu(obj->resv, 401 write, true, remain); 402 if (ret <= 0) 403 return ret == 0 ? -ETIMEDOUT : ret; 404 } 405 406 if (etnaviv_obj->flags & ETNA_BO_CACHED) { 407 dma_sync_sgtable_for_cpu(dev->dev, etnaviv_obj->sgt, 408 etnaviv_op_to_dma_dir(op)); 409 etnaviv_obj->last_cpu_prep_op = op; 410 } 411 412 return 0; 413} 414 415int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) 416{ 417 struct drm_device *dev = obj->dev; 418 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 419 420 if (etnaviv_obj->flags & ETNA_BO_CACHED) { 421 /* fini without a prep is almost certainly a userspace error */ 422 WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); 423 dma_sync_sgtable_for_device(dev->dev, etnaviv_obj->sgt, 424 etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); 425 etnaviv_obj->last_cpu_prep_op = 0; 426 } 427 428 return 0; 429} 430 431int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, 432 struct drm_etnaviv_timespec *timeout) 433{ 434 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 435 436 return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); 437} 438 439#ifdef CONFIG_DEBUG_FS 440static void etnaviv_gem_describe_fence(struct dma_fence *fence, 441 const char *type, struct seq_file *m) 442{ 443 if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) 444 seq_printf(m, "\t%9s: %s %s seq %llu\n", 445 type, 446 fence->ops->get_driver_name(fence), 447 fence->ops->get_timeline_name(fence), 448 fence->seqno); 449} 450 451static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 452{ 453 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 454 struct dma_resv *robj = obj->resv; 455 struct dma_resv_list *fobj; 456 struct dma_fence *fence; 457 unsigned long off = drm_vma_node_start(&obj->vma_node); 458 459 seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", 460 etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', 461 obj->name, kref_read(&obj->refcount), 462 off, etnaviv_obj->vaddr, obj->size); 463 464 rcu_read_lock(); 465 fobj = rcu_dereference(robj->fence); 466 if (fobj) { 467 unsigned int i, shared_count = fobj->shared_count; 468 469 for (i = 0; i < shared_count; i++) { 470 fence = rcu_dereference(fobj->shared[i]); 471 etnaviv_gem_describe_fence(fence, "Shared", m); 472 } 473 } 474 475 fence = rcu_dereference(robj->fence_excl); 476 if (fence) 477 etnaviv_gem_describe_fence(fence, "Exclusive", m); 478 rcu_read_unlock(); 479} 480 481void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, 482 struct seq_file *m) 483{ 484 struct etnaviv_gem_object *etnaviv_obj; 485 int count = 0; 486 size_t size = 0; 487 488 mutex_lock(&priv->gem_lock); 489 list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { 490 struct drm_gem_object *obj = &etnaviv_obj->base; 491 492 seq_puts(m, " "); 493 etnaviv_gem_describe(obj, m); 494 count++; 495 size += obj->size; 496 } 497 mutex_unlock(&priv->gem_lock); 498 499 seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 500} 501#endif 502 503static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) 504{ 505 vunmap(etnaviv_obj->vaddr); 506 put_pages(etnaviv_obj); 507} 508 509static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { 510 .get_pages = etnaviv_gem_shmem_get_pages, 511 .release = etnaviv_gem_shmem_release, 512 .vmap = etnaviv_gem_vmap_impl, 513 .mmap = etnaviv_gem_mmap_obj, 514}; 515 516void etnaviv_gem_free_object(struct drm_gem_object *obj) 517{ 518 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 519 struct etnaviv_drm_private *priv = obj->dev->dev_private; 520 struct etnaviv_vram_mapping *mapping, *tmp; 521 522 /* object should not be active */ 523 WARN_ON(is_active(etnaviv_obj)); 524 525 mutex_lock(&priv->gem_lock); 526 list_del(&etnaviv_obj->gem_node); 527 mutex_unlock(&priv->gem_lock); 528 529 list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, 530 obj_node) { 531 struct etnaviv_iommu_context *context = mapping->context; 532 533 WARN_ON(mapping->use); 534 535 if (context) { 536 etnaviv_iommu_unmap_gem(context, mapping); 537 etnaviv_iommu_context_put(context); 538 } 539 540 list_del(&mapping->obj_node); 541 kfree(mapping); 542 } 543 544 drm_gem_free_mmap_offset(obj); 545 etnaviv_obj->ops->release(etnaviv_obj); 546 drm_gem_object_release(obj); 547 548 kfree(etnaviv_obj); 549} 550 551void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) 552{ 553 struct etnaviv_drm_private *priv = dev->dev_private; 554 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 555 556 mutex_lock(&priv->gem_lock); 557 list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); 558 mutex_unlock(&priv->gem_lock); 559} 560 561static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, 562 const struct etnaviv_gem_ops *ops, struct drm_gem_object **obj) 563{ 564 struct etnaviv_gem_object *etnaviv_obj; 565 unsigned sz = sizeof(*etnaviv_obj); 566 bool valid = true; 567 568 /* validate flags */ 569 switch (flags & ETNA_BO_CACHE_MASK) { 570 case ETNA_BO_UNCACHED: 571 case ETNA_BO_CACHED: 572 case ETNA_BO_WC: 573 break; 574 default: 575 valid = false; 576 } 577 578 if (!valid) { 579 dev_err(dev->dev, "invalid cache flag: %x\n", 580 (flags & ETNA_BO_CACHE_MASK)); 581 return -EINVAL; 582 } 583 584 etnaviv_obj = kzalloc(sz, GFP_KERNEL); 585 if (!etnaviv_obj) 586 return -ENOMEM; 587 588 etnaviv_obj->flags = flags; 589 etnaviv_obj->ops = ops; 590 591 mutex_init(&etnaviv_obj->lock); 592 INIT_LIST_HEAD(&etnaviv_obj->vram_list); 593 594 *obj = &etnaviv_obj->base; 595 596 return 0; 597} 598 599/* convenience method to construct a GEM buffer object, and userspace handle */ 600int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, 601 u32 size, u32 flags, u32 *handle) 602{ 603 struct etnaviv_drm_private *priv = dev->dev_private; 604 struct drm_gem_object *obj = NULL; 605 int ret; 606 607 size = PAGE_ALIGN(size); 608 609 ret = etnaviv_gem_new_impl(dev, size, flags, 610 &etnaviv_gem_shmem_ops, &obj); 611 if (ret) 612 goto fail; 613 614 lockdep_set_class(&to_etnaviv_bo(obj)->lock, &etnaviv_shm_lock_class); 615 616 ret = drm_gem_object_init(dev, obj, size); 617 if (ret) 618 goto fail; 619 620 /* 621 * Our buffers are kept pinned, so allocating them from the MOVABLE 622 * zone is a really bad idea, and conflicts with CMA. See comments 623 * above new_inode() why this is required _and_ expected if you're 624 * going to pin these pages. 625 */ 626 mapping_set_gfp_mask(obj->filp->f_mapping, priv->shm_gfp_mask); 627 628 etnaviv_gem_obj_add(dev, obj); 629 630 ret = drm_gem_handle_create(file, obj, handle); 631 632 /* drop reference from allocate - handle holds it now */ 633fail: 634 drm_gem_object_put(obj); 635 636 return ret; 637} 638 639int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, 640 const struct etnaviv_gem_ops *ops, struct etnaviv_gem_object **res) 641{ 642 struct drm_gem_object *obj; 643 int ret; 644 645 ret = etnaviv_gem_new_impl(dev, size, flags, ops, &obj); 646 if (ret) 647 return ret; 648 649 drm_gem_private_object_init(dev, obj, size); 650 651 *res = to_etnaviv_bo(obj); 652 653 return 0; 654} 655 656static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) 657{ 658 struct page **pvec = NULL; 659 struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr; 660 int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT; 661 662 might_lock_read(¤t->mm->mmap_lock); 663 664 if (userptr->mm != current->mm) 665 return -EPERM; 666 667 pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 668 if (!pvec) 669 return -ENOMEM; 670 671 do { 672 unsigned num_pages = npages - pinned; 673 uint64_t ptr = userptr->ptr + pinned * PAGE_SIZE; 674 struct page **pages = pvec + pinned; 675 676 ret = pin_user_pages_fast(ptr, num_pages, 677 FOLL_WRITE | FOLL_FORCE, pages); 678 if (ret < 0) { 679 unpin_user_pages(pvec, pinned); 680 kvfree(pvec); 681 return ret; 682 } 683 684 pinned += ret; 685 686 } while (pinned < npages); 687 688 etnaviv_obj->pages = pvec; 689 690 return 0; 691} 692 693static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) 694{ 695 if (etnaviv_obj->sgt) { 696 etnaviv_gem_scatterlist_unmap(etnaviv_obj); 697 sg_free_table(etnaviv_obj->sgt); 698 kfree(etnaviv_obj->sgt); 699 } 700 if (etnaviv_obj->pages) { 701 int npages = etnaviv_obj->base.size >> PAGE_SHIFT; 702 703 unpin_user_pages(etnaviv_obj->pages, npages); 704 kvfree(etnaviv_obj->pages); 705 } 706} 707 708static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, 709 struct vm_area_struct *vma) 710{ 711 return -EINVAL; 712} 713 714static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { 715 .get_pages = etnaviv_gem_userptr_get_pages, 716 .release = etnaviv_gem_userptr_release, 717 .vmap = etnaviv_gem_vmap_impl, 718 .mmap = etnaviv_gem_userptr_mmap_obj, 719}; 720 721int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, 722 uintptr_t ptr, u32 size, u32 flags, u32 *handle) 723{ 724 struct etnaviv_gem_object *etnaviv_obj; 725 int ret; 726 727 ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, 728 &etnaviv_gem_userptr_ops, &etnaviv_obj); 729 if (ret) 730 return ret; 731 732 lockdep_set_class(&etnaviv_obj->lock, &etnaviv_userptr_lock_class); 733 734 etnaviv_obj->userptr.ptr = ptr; 735 etnaviv_obj->userptr.mm = current->mm; 736 etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); 737 738 etnaviv_gem_obj_add(dev, &etnaviv_obj->base); 739 740 ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); 741 742 /* drop reference from allocate - handle holds it now */ 743 drm_gem_object_put(&etnaviv_obj->base); 744 return ret; 745} 746