2 * Copyright (C) 2015 Etnaviv Project
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
17 #include <linux/spinlock.h>
18 #include <linux/shmem_fs.h>
19 #include <linux/sched/mm.h>
20 #include <linux/sched/task.h>
22 #include "etnaviv_drv.h"
23 #include "etnaviv_gem.h"
24 #include "etnaviv_gpu.h"
25 #include "etnaviv_mmu.h"
27 static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj)
29 struct drm_device *dev = etnaviv_obj->base.dev;
30 struct sg_table *sgt = etnaviv_obj->sgt;
33 * For non-cached buffers, ensure the new pages are clean
34 * because display controller, GPU, etc. are not coherent.
36 if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK)
37 dma_map_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL);
40 static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj)
42 struct drm_device *dev = etnaviv_obj->base.dev;
43 struct sg_table *sgt = etnaviv_obj->sgt;
46 * For non-cached buffers, ensure the new pages are clean
47 * because display controller, GPU, etc. are not coherent:
49 * WARNING: The DMA API does not support concurrent CPU
50 * and device access to the memory area. With BIDIRECTIONAL,
51 * we will clean the cache lines which overlap the region,
52 * and invalidate all cache lines (partially) contained in
55 * If you have dirty data in the overlapping cache lines,
56 * that will corrupt the GPU-written data. If you have
57 * written into the remainder of the region, this can
58 * discard those writes.
60 if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK)
61 dma_unmap_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL);
64 /* called with etnaviv_obj->lock held */
65 static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
67 struct drm_device *dev = etnaviv_obj->base.dev;
68 struct page **p = drm_gem_get_pages(&etnaviv_obj->base);
71 dev_err(dev->dev, "could not get pages: %ld\n", PTR_ERR(p));
75 etnaviv_obj->pages = p;
80 static void put_pages(struct etnaviv_gem_object *etnaviv_obj)
82 if (etnaviv_obj->sgt) {
83 etnaviv_gem_scatterlist_unmap(etnaviv_obj);
84 sg_free_table(etnaviv_obj->sgt);
85 kfree(etnaviv_obj->sgt);
86 etnaviv_obj->sgt = NULL;
88 if (etnaviv_obj->pages) {
89 drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages,
92 etnaviv_obj->pages = NULL;
96 struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
100 lockdep_assert_held(&etnaviv_obj->lock);
102 if (!etnaviv_obj->pages) {
103 ret = etnaviv_obj->ops->get_pages(etnaviv_obj);
108 if (!etnaviv_obj->sgt) {
109 struct drm_device *dev = etnaviv_obj->base.dev;
110 int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
111 struct sg_table *sgt;
113 sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages);
115 dev_err(dev->dev, "failed to allocate sgt: %ld\n",
117 return ERR_CAST(sgt);
120 etnaviv_obj->sgt = sgt;
122 etnaviv_gem_scatter_map(etnaviv_obj);
125 return etnaviv_obj->pages;
128 void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj)
130 lockdep_assert_held(&etnaviv_obj->lock);
131 /* when we start tracking the pin count, then do something here */
134 static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
135 struct vm_area_struct *vma)
137 pgprot_t vm_page_prot;
139 vma->vm_flags &= ~VM_PFNMAP;
140 vma->vm_flags |= VM_MIXEDMAP;
142 vm_page_prot = vm_get_page_prot(vma->vm_flags);
144 if (etnaviv_obj->flags & ETNA_BO_WC) {
145 vma->vm_page_prot = pgprot_writecombine(vm_page_prot);
146 } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) {
147 vma->vm_page_prot = pgprot_noncached(vm_page_prot);
150 * Shunt off cached objs to shmem file so they have their own
151 * address_space (so unmap_mapping_range does what we want,
152 * in particular in the case of mmap'd dmabufs)
155 get_file(etnaviv_obj->base.filp);
157 vma->vm_file = etnaviv_obj->base.filp;
159 vma->vm_page_prot = vm_page_prot;
165 int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma)
167 struct etnaviv_gem_object *obj;
170 ret = drm_gem_mmap(filp, vma);
172 DBG("mmap failed: %d", ret);
176 obj = to_etnaviv_bo(vma->vm_private_data);
177 return obj->ops->mmap(obj, vma);
180 int etnaviv_gem_fault(struct vm_fault *vmf)
182 struct vm_area_struct *vma = vmf->vma;
183 struct drm_gem_object *obj = vma->vm_private_data;
184 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
185 struct page **pages, *page;
190 * Make sure we don't parallel update on a fault, nor move or remove
191 * something from beneath our feet. Note that vm_insert_page() is
192 * specifically coded to take care of this, so we don't have to.
194 ret = mutex_lock_interruptible(&etnaviv_obj->lock);
198 /* make sure we have pages attached now */
199 pages = etnaviv_gem_get_pages(etnaviv_obj);
200 mutex_unlock(&etnaviv_obj->lock);
203 ret = PTR_ERR(pages);
207 /* We don't use vmf->pgoff since that has the fake offset: */
208 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
212 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
213 page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT);
215 ret = vm_insert_page(vma, vmf->address, page);
225 * EBUSY is ok: this just means that another thread
226 * already did the job.
228 return VM_FAULT_NOPAGE;
232 return VM_FAULT_SIGBUS;
236 int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset)
240 /* Make it mmapable */
241 ret = drm_gem_create_mmap_offset(obj);
243 dev_err(obj->dev->dev, "could not allocate mmap offset\n");
245 *offset = drm_vma_node_offset_addr(&obj->vma_node);
250 static struct etnaviv_vram_mapping *
251 etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj,
252 struct etnaviv_iommu *mmu)
254 struct etnaviv_vram_mapping *mapping;
256 list_for_each_entry(mapping, &obj->vram_list, obj_node) {
257 if (mapping->mmu == mmu)
264 void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping)
266 struct etnaviv_gem_object *etnaviv_obj = mapping->object;
268 drm_gem_object_reference(&etnaviv_obj->base);
270 mutex_lock(&etnaviv_obj->lock);
271 WARN_ON(mapping->use == 0);
273 mutex_unlock(&etnaviv_obj->lock);
276 void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping)
278 struct etnaviv_gem_object *etnaviv_obj = mapping->object;
280 mutex_lock(&etnaviv_obj->lock);
281 WARN_ON(mapping->use == 0);
283 mutex_unlock(&etnaviv_obj->lock);
285 drm_gem_object_unreference_unlocked(&etnaviv_obj->base);
288 struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
289 struct drm_gem_object *obj, struct etnaviv_gpu *gpu)
291 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
292 struct etnaviv_vram_mapping *mapping;
296 mutex_lock(&etnaviv_obj->lock);
297 mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, gpu->mmu);
300 * Holding the object lock prevents the use count changing
301 * beneath us. If the use count is zero, the MMU might be
302 * reaping this object, so take the lock and re-check that
303 * the MMU owns this mapping to close this race.
305 if (mapping->use == 0) {
306 mutex_lock(&gpu->mmu->lock);
307 if (mapping->mmu == gpu->mmu)
311 mutex_unlock(&gpu->mmu->lock);
320 pages = etnaviv_gem_get_pages(etnaviv_obj);
322 ret = PTR_ERR(pages);
327 * See if we have a reaped vram mapping we can re-use before
328 * allocating a fresh mapping.
330 mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL);
332 mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
338 INIT_LIST_HEAD(&mapping->scan_node);
339 mapping->object = etnaviv_obj;
341 list_del(&mapping->obj_node);
344 mapping->mmu = gpu->mmu;
347 ret = etnaviv_iommu_map_gem(gpu->mmu, etnaviv_obj, gpu->memory_base,
352 list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list);
355 mutex_unlock(&etnaviv_obj->lock);
360 /* Take a reference on the object */
361 drm_gem_object_reference(obj);
365 void *etnaviv_gem_vmap(struct drm_gem_object *obj)
367 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
369 if (etnaviv_obj->vaddr)
370 return etnaviv_obj->vaddr;
372 mutex_lock(&etnaviv_obj->lock);
374 * Need to check again, as we might have raced with another thread
375 * while waiting for the mutex.
377 if (!etnaviv_obj->vaddr)
378 etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj);
379 mutex_unlock(&etnaviv_obj->lock);
381 return etnaviv_obj->vaddr;
384 static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj)
388 lockdep_assert_held(&obj->lock);
390 pages = etnaviv_gem_get_pages(obj);
394 return vmap(pages, obj->base.size >> PAGE_SHIFT,
395 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
398 static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op)
400 if (op & ETNA_PREP_READ)
401 return DMA_FROM_DEVICE;
402 else if (op & ETNA_PREP_WRITE)
403 return DMA_TO_DEVICE;
405 return DMA_BIDIRECTIONAL;
408 int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op,
409 struct timespec *timeout)
411 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
412 struct drm_device *dev = obj->dev;
413 bool write = !!(op & ETNA_PREP_WRITE);
414 unsigned long remain =
415 op & ETNA_PREP_NOSYNC ? 0 : etnaviv_timeout_to_jiffies(timeout);
418 lret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv,
419 write, true, remain);
423 return remain == 0 ? -EBUSY : -ETIMEDOUT;
425 if (etnaviv_obj->flags & ETNA_BO_CACHED) {
426 if (!etnaviv_obj->sgt) {
429 mutex_lock(&etnaviv_obj->lock);
430 ret = etnaviv_gem_get_pages(etnaviv_obj);
431 mutex_unlock(&etnaviv_obj->lock);
436 dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl,
437 etnaviv_obj->sgt->nents,
438 etnaviv_op_to_dma_dir(op));
439 etnaviv_obj->last_cpu_prep_op = op;
445 int etnaviv_gem_cpu_fini(struct drm_gem_object *obj)
447 struct drm_device *dev = obj->dev;
448 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
450 if (etnaviv_obj->flags & ETNA_BO_CACHED) {
451 /* fini without a prep is almost certainly a userspace error */
452 WARN_ON(etnaviv_obj->last_cpu_prep_op == 0);
453 dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl,
454 etnaviv_obj->sgt->nents,
455 etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op));
456 etnaviv_obj->last_cpu_prep_op = 0;
462 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
463 struct timespec *timeout)
465 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
467 return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout);
470 #ifdef CONFIG_DEBUG_FS
471 static void etnaviv_gem_describe_fence(struct dma_fence *fence,
472 const char *type, struct seq_file *m)
474 if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
475 seq_printf(m, "\t%9s: %s %s seq %u\n",
477 fence->ops->get_driver_name(fence),
478 fence->ops->get_timeline_name(fence),
482 static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
484 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
485 struct reservation_object *robj = etnaviv_obj->resv;
486 struct reservation_object_list *fobj;
487 struct dma_fence *fence;
488 unsigned long off = drm_vma_node_start(&obj->vma_node);
490 seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n",
491 etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I',
492 obj->name, kref_read(&obj->refcount),
493 off, etnaviv_obj->vaddr, obj->size);
496 fobj = rcu_dereference(robj->fence);
498 unsigned int i, shared_count = fobj->shared_count;
500 for (i = 0; i < shared_count; i++) {
501 fence = rcu_dereference(fobj->shared[i]);
502 etnaviv_gem_describe_fence(fence, "Shared", m);
506 fence = rcu_dereference(robj->fence_excl);
508 etnaviv_gem_describe_fence(fence, "Exclusive", m);
512 void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,
515 struct etnaviv_gem_object *etnaviv_obj;
519 mutex_lock(&priv->gem_lock);
520 list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) {
521 struct drm_gem_object *obj = &etnaviv_obj->base;
524 etnaviv_gem_describe(obj, m);
528 mutex_unlock(&priv->gem_lock);
530 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
534 static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj)
536 vunmap(etnaviv_obj->vaddr);
537 put_pages(etnaviv_obj);
540 static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = {
541 .get_pages = etnaviv_gem_shmem_get_pages,
542 .release = etnaviv_gem_shmem_release,
543 .vmap = etnaviv_gem_vmap_impl,
544 .mmap = etnaviv_gem_mmap_obj,
547 void etnaviv_gem_free_object(struct drm_gem_object *obj)
549 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
550 struct etnaviv_vram_mapping *mapping, *tmp;
552 /* object should not be active */
553 WARN_ON(is_active(etnaviv_obj));
555 list_del(&etnaviv_obj->gem_node);
557 list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list,
559 struct etnaviv_iommu *mmu = mapping->mmu;
561 WARN_ON(mapping->use);
564 etnaviv_iommu_unmap_gem(mmu, mapping);
566 list_del(&mapping->obj_node);
570 drm_gem_free_mmap_offset(obj);
571 etnaviv_obj->ops->release(etnaviv_obj);
572 if (etnaviv_obj->resv == &etnaviv_obj->_resv)
573 reservation_object_fini(&etnaviv_obj->_resv);
574 drm_gem_object_release(obj);
579 int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj)
581 struct etnaviv_drm_private *priv = dev->dev_private;
582 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
584 mutex_lock(&priv->gem_lock);
585 list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list);
586 mutex_unlock(&priv->gem_lock);
591 static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags,
592 struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
593 struct drm_gem_object **obj)
595 struct etnaviv_gem_object *etnaviv_obj;
596 unsigned sz = sizeof(*etnaviv_obj);
600 switch (flags & ETNA_BO_CACHE_MASK) {
601 case ETNA_BO_UNCACHED:
610 dev_err(dev->dev, "invalid cache flag: %x\n",
611 (flags & ETNA_BO_CACHE_MASK));
615 etnaviv_obj = kzalloc(sz, GFP_KERNEL);
619 etnaviv_obj->flags = flags;
620 etnaviv_obj->ops = ops;
622 etnaviv_obj->resv = robj;
624 etnaviv_obj->resv = &etnaviv_obj->_resv;
625 reservation_object_init(&etnaviv_obj->_resv);
628 mutex_init(&etnaviv_obj->lock);
629 INIT_LIST_HEAD(&etnaviv_obj->vram_list);
631 *obj = &etnaviv_obj->base;
636 static struct drm_gem_object *__etnaviv_gem_new(struct drm_device *dev,
639 struct drm_gem_object *obj = NULL;
642 size = PAGE_ALIGN(size);
644 ret = etnaviv_gem_new_impl(dev, size, flags, NULL,
645 &etnaviv_gem_shmem_ops, &obj);
649 ret = drm_gem_object_init(dev, obj, size);
651 struct address_space *mapping;
654 * Our buffers are kept pinned, so allocating them
655 * from the MOVABLE zone is a really bad idea, and
656 * conflicts with CMA. See coments above new_inode()
657 * why this is required _and_ expected if you're
658 * going to pin these pages.
660 mapping = obj->filp->f_mapping;
661 mapping_set_gfp_mask(mapping, GFP_HIGHUSER);
670 drm_gem_object_unreference_unlocked(obj);
674 /* convenience method to construct a GEM buffer object, and userspace handle */
675 int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file,
676 u32 size, u32 flags, u32 *handle)
678 struct drm_gem_object *obj;
681 obj = __etnaviv_gem_new(dev, size, flags);
685 ret = etnaviv_gem_obj_add(dev, obj);
687 drm_gem_object_unreference_unlocked(obj);
691 ret = drm_gem_handle_create(file, obj, handle);
693 /* drop reference from allocate - handle holds it now */
694 drm_gem_object_unreference_unlocked(obj);
699 struct drm_gem_object *etnaviv_gem_new(struct drm_device *dev,
702 struct drm_gem_object *obj;
705 obj = __etnaviv_gem_new(dev, size, flags);
709 ret = etnaviv_gem_obj_add(dev, obj);
711 drm_gem_object_unreference_unlocked(obj);
718 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
719 struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
720 struct etnaviv_gem_object **res)
722 struct drm_gem_object *obj;
725 ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj);
729 drm_gem_private_object_init(dev, obj, size);
731 *res = to_etnaviv_bo(obj);
736 struct get_pages_work {
737 struct work_struct work;
738 struct mm_struct *mm;
739 struct task_struct *task;
740 struct etnaviv_gem_object *etnaviv_obj;
743 static struct page **etnaviv_gem_userptr_do_get_pages(
744 struct etnaviv_gem_object *etnaviv_obj, struct mm_struct *mm, struct task_struct *task)
746 int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
749 unsigned int flags = 0;
751 pvec = drm_malloc_ab(npages, sizeof(struct page *));
753 return ERR_PTR(-ENOMEM);
755 if (!etnaviv_obj->userptr.ro)
759 ptr = etnaviv_obj->userptr.ptr;
761 down_read(&mm->mmap_sem);
762 while (pinned < npages) {
763 ret = get_user_pages_remote(task, mm, ptr, npages - pinned,
764 flags, pvec + pinned, NULL, NULL);
768 ptr += ret * PAGE_SIZE;
771 up_read(&mm->mmap_sem);
774 release_pages(pvec, pinned, 0);
775 drm_free_large(pvec);
782 static void __etnaviv_gem_userptr_get_pages(struct work_struct *_work)
784 struct get_pages_work *work = container_of(_work, typeof(*work), work);
785 struct etnaviv_gem_object *etnaviv_obj = work->etnaviv_obj;
788 pvec = etnaviv_gem_userptr_do_get_pages(etnaviv_obj, work->mm, work->task);
790 mutex_lock(&etnaviv_obj->lock);
792 etnaviv_obj->userptr.work = ERR_CAST(pvec);
794 etnaviv_obj->userptr.work = NULL;
795 etnaviv_obj->pages = pvec;
798 mutex_unlock(&etnaviv_obj->lock);
799 drm_gem_object_unreference_unlocked(&etnaviv_obj->base);
802 put_task_struct(work->task);
806 static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj)
808 struct page **pvec = NULL;
809 struct get_pages_work *work;
810 struct mm_struct *mm;
811 int ret, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
813 if (etnaviv_obj->userptr.work) {
814 if (IS_ERR(etnaviv_obj->userptr.work)) {
815 ret = PTR_ERR(etnaviv_obj->userptr.work);
816 etnaviv_obj->userptr.work = NULL;
823 mm = get_task_mm(etnaviv_obj->userptr.task);
825 if (mm == current->mm) {
826 pvec = drm_malloc_ab(npages, sizeof(struct page *));
832 pinned = __get_user_pages_fast(etnaviv_obj->userptr.ptr, npages,
833 !etnaviv_obj->userptr.ro, pvec);
835 drm_free_large(pvec);
840 if (pinned == npages) {
841 etnaviv_obj->pages = pvec;
847 release_pages(pvec, pinned, 0);
848 drm_free_large(pvec);
850 work = kmalloc(sizeof(*work), GFP_KERNEL);
856 get_task_struct(current);
857 drm_gem_object_reference(&etnaviv_obj->base);
860 work->task = current;
861 work->etnaviv_obj = etnaviv_obj;
863 etnaviv_obj->userptr.work = &work->work;
864 INIT_WORK(&work->work, __etnaviv_gem_userptr_get_pages);
866 etnaviv_queue_work(etnaviv_obj->base.dev, &work->work);
871 static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj)
873 if (etnaviv_obj->sgt) {
874 etnaviv_gem_scatterlist_unmap(etnaviv_obj);
875 sg_free_table(etnaviv_obj->sgt);
876 kfree(etnaviv_obj->sgt);
878 if (etnaviv_obj->pages) {
879 int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
881 release_pages(etnaviv_obj->pages, npages, 0);
882 drm_free_large(etnaviv_obj->pages);
884 put_task_struct(etnaviv_obj->userptr.task);
887 static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
888 struct vm_area_struct *vma)
893 static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = {
894 .get_pages = etnaviv_gem_userptr_get_pages,
895 .release = etnaviv_gem_userptr_release,
896 .vmap = etnaviv_gem_vmap_impl,
897 .mmap = etnaviv_gem_userptr_mmap_obj,
900 int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file,
901 uintptr_t ptr, u32 size, u32 flags, u32 *handle)
903 struct etnaviv_gem_object *etnaviv_obj;
906 ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL,
907 &etnaviv_gem_userptr_ops, &etnaviv_obj);
911 etnaviv_obj->userptr.ptr = ptr;
912 etnaviv_obj->userptr.task = current;
913 etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE);
914 get_task_struct(current);
916 ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
920 ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle);
922 /* drop reference from allocate - handle holds it now */
923 drm_gem_object_unreference_unlocked(&etnaviv_obj->base);