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>
20 #include "etnaviv_drv.h"
21 #include "etnaviv_gem.h"
22 #include "etnaviv_gpu.h"
23 #include "etnaviv_mmu.h"
25 static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj)
27 struct drm_device *dev = etnaviv_obj->base.dev;
28 struct sg_table *sgt = etnaviv_obj->sgt;
31 * For non-cached buffers, ensure the new pages are clean
32 * because display controller, GPU, etc. are not coherent.
34 if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK)
35 dma_map_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL);
38 static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj)
40 struct drm_device *dev = etnaviv_obj->base.dev;
41 struct sg_table *sgt = etnaviv_obj->sgt;
44 * For non-cached buffers, ensure the new pages are clean
45 * because display controller, GPU, etc. are not coherent:
47 * WARNING: The DMA API does not support concurrent CPU
48 * and device access to the memory area. With BIDIRECTIONAL,
49 * we will clean the cache lines which overlap the region,
50 * and invalidate all cache lines (partially) contained in
53 * If you have dirty data in the overlapping cache lines,
54 * that will corrupt the GPU-written data. If you have
55 * written into the remainder of the region, this can
56 * discard those writes.
58 if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK)
59 dma_unmap_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL);
62 /* called with etnaviv_obj->lock held */
63 static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
65 struct drm_device *dev = etnaviv_obj->base.dev;
66 struct page **p = drm_gem_get_pages(&etnaviv_obj->base);
69 dev_err(dev->dev, "could not get pages: %ld\n", PTR_ERR(p));
73 etnaviv_obj->pages = p;
78 static void put_pages(struct etnaviv_gem_object *etnaviv_obj)
80 if (etnaviv_obj->sgt) {
81 etnaviv_gem_scatterlist_unmap(etnaviv_obj);
82 sg_free_table(etnaviv_obj->sgt);
83 kfree(etnaviv_obj->sgt);
84 etnaviv_obj->sgt = NULL;
86 if (etnaviv_obj->pages) {
87 drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages,
90 etnaviv_obj->pages = NULL;
94 struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
98 lockdep_assert_held(&etnaviv_obj->lock);
100 if (!etnaviv_obj->pages) {
101 ret = etnaviv_obj->ops->get_pages(etnaviv_obj);
106 if (!etnaviv_obj->sgt) {
107 struct drm_device *dev = etnaviv_obj->base.dev;
108 int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
109 struct sg_table *sgt;
111 sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages);
113 dev_err(dev->dev, "failed to allocate sgt: %ld\n",
115 return ERR_CAST(sgt);
118 etnaviv_obj->sgt = sgt;
120 etnaviv_gem_scatter_map(etnaviv_obj);
123 return etnaviv_obj->pages;
126 void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj)
128 lockdep_assert_held(&etnaviv_obj->lock);
129 /* when we start tracking the pin count, then do something here */
132 static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
133 struct vm_area_struct *vma)
135 pgprot_t vm_page_prot;
137 vma->vm_flags &= ~VM_PFNMAP;
138 vma->vm_flags |= VM_MIXEDMAP;
140 vm_page_prot = vm_get_page_prot(vma->vm_flags);
142 if (etnaviv_obj->flags & ETNA_BO_WC) {
143 vma->vm_page_prot = pgprot_writecombine(vm_page_prot);
144 } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) {
145 vma->vm_page_prot = pgprot_noncached(vm_page_prot);
148 * Shunt off cached objs to shmem file so they have their own
149 * address_space (so unmap_mapping_range does what we want,
150 * in particular in the case of mmap'd dmabufs)
153 get_file(etnaviv_obj->base.filp);
155 vma->vm_file = etnaviv_obj->base.filp;
157 vma->vm_page_prot = vm_page_prot;
163 int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma)
165 struct etnaviv_gem_object *obj;
168 ret = drm_gem_mmap(filp, vma);
170 DBG("mmap failed: %d", ret);
174 obj = to_etnaviv_bo(vma->vm_private_data);
175 return obj->ops->mmap(obj, vma);
178 int etnaviv_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
180 struct drm_gem_object *obj = vma->vm_private_data;
181 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
182 struct page **pages, *page;
187 * Make sure we don't parallel update on a fault, nor move or remove
188 * something from beneath our feet. Note that vm_insert_page() is
189 * specifically coded to take care of this, so we don't have to.
191 ret = mutex_lock_interruptible(&etnaviv_obj->lock);
195 /* make sure we have pages attached now */
196 pages = etnaviv_gem_get_pages(etnaviv_obj);
197 mutex_unlock(&etnaviv_obj->lock);
200 ret = PTR_ERR(pages);
204 /* We don't use vmf->pgoff since that has the fake offset: */
205 pgoff = ((unsigned long)vmf->virtual_address -
206 vma->vm_start) >> PAGE_SHIFT;
210 VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address,
211 page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT);
213 ret = vm_insert_page(vma, (unsigned long)vmf->virtual_address, page);
223 * EBUSY is ok: this just means that another thread
224 * already did the job.
226 return VM_FAULT_NOPAGE;
230 return VM_FAULT_SIGBUS;
234 int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset)
238 /* Make it mmapable */
239 ret = drm_gem_create_mmap_offset(obj);
241 dev_err(obj->dev->dev, "could not allocate mmap offset\n");
243 *offset = drm_vma_node_offset_addr(&obj->vma_node);
248 static struct etnaviv_vram_mapping *
249 etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj,
250 struct etnaviv_iommu *mmu)
252 struct etnaviv_vram_mapping *mapping;
254 list_for_each_entry(mapping, &obj->vram_list, obj_node) {
255 if (mapping->mmu == mmu)
262 void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping)
264 struct etnaviv_gem_object *etnaviv_obj = mapping->object;
266 drm_gem_object_reference(&etnaviv_obj->base);
268 mutex_lock(&etnaviv_obj->lock);
269 WARN_ON(mapping->use == 0);
271 mutex_unlock(&etnaviv_obj->lock);
274 void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping)
276 struct etnaviv_gem_object *etnaviv_obj = mapping->object;
278 mutex_lock(&etnaviv_obj->lock);
279 WARN_ON(mapping->use == 0);
281 mutex_unlock(&etnaviv_obj->lock);
283 drm_gem_object_unreference_unlocked(&etnaviv_obj->base);
286 struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
287 struct drm_gem_object *obj, struct etnaviv_gpu *gpu)
289 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
290 struct etnaviv_vram_mapping *mapping;
294 mutex_lock(&etnaviv_obj->lock);
295 mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, gpu->mmu);
298 * Holding the object lock prevents the use count changing
299 * beneath us. If the use count is zero, the MMU might be
300 * reaping this object, so take the lock and re-check that
301 * the MMU owns this mapping to close this race.
303 if (mapping->use == 0) {
304 mutex_lock(&gpu->mmu->lock);
305 if (mapping->mmu == gpu->mmu)
309 mutex_unlock(&gpu->mmu->lock);
318 pages = etnaviv_gem_get_pages(etnaviv_obj);
320 ret = PTR_ERR(pages);
325 * See if we have a reaped vram mapping we can re-use before
326 * allocating a fresh mapping.
328 mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL);
330 mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
336 INIT_LIST_HEAD(&mapping->scan_node);
337 mapping->object = etnaviv_obj;
339 list_del(&mapping->obj_node);
342 mapping->mmu = gpu->mmu;
345 ret = etnaviv_iommu_map_gem(gpu->mmu, etnaviv_obj, gpu->memory_base,
350 list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list);
353 mutex_unlock(&etnaviv_obj->lock);
358 /* Take a reference on the object */
359 drm_gem_object_reference(obj);
363 void *etnaviv_gem_vmap(struct drm_gem_object *obj)
365 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
367 if (etnaviv_obj->vaddr)
368 return etnaviv_obj->vaddr;
370 mutex_lock(&etnaviv_obj->lock);
372 * Need to check again, as we might have raced with another thread
373 * while waiting for the mutex.
375 if (!etnaviv_obj->vaddr)
376 etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj);
377 mutex_unlock(&etnaviv_obj->lock);
379 return etnaviv_obj->vaddr;
382 static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj)
386 lockdep_assert_held(&obj->lock);
388 pages = etnaviv_gem_get_pages(obj);
392 return vmap(pages, obj->base.size >> PAGE_SHIFT,
393 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
396 static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op)
398 if (op & ETNA_PREP_READ)
399 return DMA_FROM_DEVICE;
400 else if (op & ETNA_PREP_WRITE)
401 return DMA_TO_DEVICE;
403 return DMA_BIDIRECTIONAL;
406 int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op,
407 struct timespec *timeout)
409 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
410 struct drm_device *dev = obj->dev;
411 bool write = !!(op & ETNA_PREP_WRITE);
414 if (op & ETNA_PREP_NOSYNC) {
415 if (!reservation_object_test_signaled_rcu(etnaviv_obj->resv,
419 unsigned long remain = etnaviv_timeout_to_jiffies(timeout);
421 ret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv,
422 write, true, remain);
424 return ret == 0 ? -ETIMEDOUT : ret;
427 if (etnaviv_obj->flags & ETNA_BO_CACHED) {
428 if (!etnaviv_obj->sgt) {
431 mutex_lock(&etnaviv_obj->lock);
432 ret = etnaviv_gem_get_pages(etnaviv_obj);
433 mutex_unlock(&etnaviv_obj->lock);
438 dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl,
439 etnaviv_obj->sgt->nents,
440 etnaviv_op_to_dma_dir(op));
441 etnaviv_obj->last_cpu_prep_op = op;
447 int etnaviv_gem_cpu_fini(struct drm_gem_object *obj)
449 struct drm_device *dev = obj->dev;
450 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
452 if (etnaviv_obj->flags & ETNA_BO_CACHED) {
453 /* fini without a prep is almost certainly a userspace error */
454 WARN_ON(etnaviv_obj->last_cpu_prep_op == 0);
455 dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl,
456 etnaviv_obj->sgt->nents,
457 etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op));
458 etnaviv_obj->last_cpu_prep_op = 0;
464 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
465 struct timespec *timeout)
467 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
469 return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout);
472 #ifdef CONFIG_DEBUG_FS
473 static void etnaviv_gem_describe_fence(struct fence *fence,
474 const char *type, struct seq_file *m)
476 if (!test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->flags))
477 seq_printf(m, "\t%9s: %s %s seq %u\n",
479 fence->ops->get_driver_name(fence),
480 fence->ops->get_timeline_name(fence),
484 static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
486 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
487 struct reservation_object *robj = etnaviv_obj->resv;
488 struct reservation_object_list *fobj;
490 unsigned long off = drm_vma_node_start(&obj->vma_node);
492 seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n",
493 etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I',
494 obj->name, obj->refcount.refcount.counter,
495 off, etnaviv_obj->vaddr, obj->size);
498 fobj = rcu_dereference(robj->fence);
500 unsigned int i, shared_count = fobj->shared_count;
502 for (i = 0; i < shared_count; i++) {
503 fence = rcu_dereference(fobj->shared[i]);
504 etnaviv_gem_describe_fence(fence, "Shared", m);
508 fence = rcu_dereference(robj->fence_excl);
510 etnaviv_gem_describe_fence(fence, "Exclusive", m);
514 void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,
517 struct etnaviv_gem_object *etnaviv_obj;
521 mutex_lock(&priv->gem_lock);
522 list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) {
523 struct drm_gem_object *obj = &etnaviv_obj->base;
526 etnaviv_gem_describe(obj, m);
530 mutex_unlock(&priv->gem_lock);
532 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
536 static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj)
538 vunmap(etnaviv_obj->vaddr);
539 put_pages(etnaviv_obj);
542 static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = {
543 .get_pages = etnaviv_gem_shmem_get_pages,
544 .release = etnaviv_gem_shmem_release,
545 .vmap = etnaviv_gem_vmap_impl,
546 .mmap = etnaviv_gem_mmap_obj,
549 void etnaviv_gem_free_object(struct drm_gem_object *obj)
551 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
552 struct etnaviv_vram_mapping *mapping, *tmp;
554 /* object should not be active */
555 WARN_ON(is_active(etnaviv_obj));
557 list_del(&etnaviv_obj->gem_node);
559 list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list,
561 struct etnaviv_iommu *mmu = mapping->mmu;
563 WARN_ON(mapping->use);
566 etnaviv_iommu_unmap_gem(mmu, mapping);
568 list_del(&mapping->obj_node);
572 drm_gem_free_mmap_offset(obj);
573 etnaviv_obj->ops->release(etnaviv_obj);
574 if (etnaviv_obj->resv == &etnaviv_obj->_resv)
575 reservation_object_fini(&etnaviv_obj->_resv);
576 drm_gem_object_release(obj);
581 int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj)
583 struct etnaviv_drm_private *priv = dev->dev_private;
584 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
586 mutex_lock(&priv->gem_lock);
587 list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list);
588 mutex_unlock(&priv->gem_lock);
593 static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags,
594 struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
595 struct drm_gem_object **obj)
597 struct etnaviv_gem_object *etnaviv_obj;
598 unsigned sz = sizeof(*etnaviv_obj);
602 switch (flags & ETNA_BO_CACHE_MASK) {
603 case ETNA_BO_UNCACHED:
612 dev_err(dev->dev, "invalid cache flag: %x\n",
613 (flags & ETNA_BO_CACHE_MASK));
617 etnaviv_obj = kzalloc(sz, GFP_KERNEL);
621 etnaviv_obj->flags = flags;
622 etnaviv_obj->ops = ops;
624 etnaviv_obj->resv = robj;
626 etnaviv_obj->resv = &etnaviv_obj->_resv;
627 reservation_object_init(&etnaviv_obj->_resv);
630 mutex_init(&etnaviv_obj->lock);
631 INIT_LIST_HEAD(&etnaviv_obj->vram_list);
633 *obj = &etnaviv_obj->base;
638 static struct drm_gem_object *__etnaviv_gem_new(struct drm_device *dev,
641 struct drm_gem_object *obj = NULL;
644 size = PAGE_ALIGN(size);
646 ret = etnaviv_gem_new_impl(dev, size, flags, NULL,
647 &etnaviv_gem_shmem_ops, &obj);
651 ret = drm_gem_object_init(dev, obj, size);
653 struct address_space *mapping;
656 * Our buffers are kept pinned, so allocating them
657 * from the MOVABLE zone is a really bad idea, and
658 * conflicts with CMA. See coments above new_inode()
659 * why this is required _and_ expected if you're
660 * going to pin these pages.
662 mapping = obj->filp->f_mapping;
663 mapping_set_gfp_mask(mapping, GFP_HIGHUSER);
672 drm_gem_object_unreference_unlocked(obj);
676 /* convenience method to construct a GEM buffer object, and userspace handle */
677 int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file,
678 u32 size, u32 flags, u32 *handle)
680 struct drm_gem_object *obj;
683 obj = __etnaviv_gem_new(dev, size, flags);
687 ret = etnaviv_gem_obj_add(dev, obj);
689 drm_gem_object_unreference_unlocked(obj);
693 ret = drm_gem_handle_create(file, obj, handle);
695 /* drop reference from allocate - handle holds it now */
696 drm_gem_object_unreference_unlocked(obj);
701 struct drm_gem_object *etnaviv_gem_new(struct drm_device *dev,
704 struct drm_gem_object *obj;
707 obj = __etnaviv_gem_new(dev, size, flags);
711 ret = etnaviv_gem_obj_add(dev, obj);
713 drm_gem_object_unreference_unlocked(obj);
720 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
721 struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
722 struct etnaviv_gem_object **res)
724 struct drm_gem_object *obj;
727 ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj);
731 drm_gem_private_object_init(dev, obj, size);
733 *res = to_etnaviv_bo(obj);
738 struct get_pages_work {
739 struct work_struct work;
740 struct mm_struct *mm;
741 struct task_struct *task;
742 struct etnaviv_gem_object *etnaviv_obj;
745 static struct page **etnaviv_gem_userptr_do_get_pages(
746 struct etnaviv_gem_object *etnaviv_obj, struct mm_struct *mm, struct task_struct *task)
748 int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
752 pvec = drm_malloc_ab(npages, sizeof(struct page *));
754 return ERR_PTR(-ENOMEM);
757 ptr = etnaviv_obj->userptr.ptr;
759 down_read(&mm->mmap_sem);
760 while (pinned < npages) {
761 ret = get_user_pages_remote(task, mm, ptr, npages - pinned,
762 !etnaviv_obj->userptr.ro, 0,
763 pvec + pinned, NULL);
767 ptr += ret * PAGE_SIZE;
770 up_read(&mm->mmap_sem);
773 release_pages(pvec, pinned, 0);
774 drm_free_large(pvec);
781 static void __etnaviv_gem_userptr_get_pages(struct work_struct *_work)
783 struct get_pages_work *work = container_of(_work, typeof(*work), work);
784 struct etnaviv_gem_object *etnaviv_obj = work->etnaviv_obj;
787 pvec = etnaviv_gem_userptr_do_get_pages(etnaviv_obj, work->mm, work->task);
789 mutex_lock(&etnaviv_obj->lock);
791 etnaviv_obj->userptr.work = ERR_CAST(pvec);
793 etnaviv_obj->userptr.work = NULL;
794 etnaviv_obj->pages = pvec;
797 mutex_unlock(&etnaviv_obj->lock);
798 drm_gem_object_unreference_unlocked(&etnaviv_obj->base);
801 put_task_struct(work->task);
805 static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj)
807 struct page **pvec = NULL;
808 struct get_pages_work *work;
809 struct mm_struct *mm;
810 int ret, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
812 if (etnaviv_obj->userptr.work) {
813 if (IS_ERR(etnaviv_obj->userptr.work)) {
814 ret = PTR_ERR(etnaviv_obj->userptr.work);
815 etnaviv_obj->userptr.work = NULL;
822 mm = get_task_mm(etnaviv_obj->userptr.task);
824 if (mm == current->mm) {
825 pvec = drm_malloc_ab(npages, sizeof(struct page *));
831 pinned = __get_user_pages_fast(etnaviv_obj->userptr.ptr, npages,
832 !etnaviv_obj->userptr.ro, pvec);
834 drm_free_large(pvec);
839 if (pinned == npages) {
840 etnaviv_obj->pages = pvec;
846 release_pages(pvec, pinned, 0);
847 drm_free_large(pvec);
849 work = kmalloc(sizeof(*work), GFP_KERNEL);
855 get_task_struct(current);
856 drm_gem_object_reference(&etnaviv_obj->base);
859 work->task = current;
860 work->etnaviv_obj = etnaviv_obj;
862 etnaviv_obj->userptr.work = &work->work;
863 INIT_WORK(&work->work, __etnaviv_gem_userptr_get_pages);
865 etnaviv_queue_work(etnaviv_obj->base.dev, &work->work);
870 static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj)
872 if (etnaviv_obj->sgt) {
873 etnaviv_gem_scatterlist_unmap(etnaviv_obj);
874 sg_free_table(etnaviv_obj->sgt);
875 kfree(etnaviv_obj->sgt);
877 if (etnaviv_obj->pages) {
878 int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
880 release_pages(etnaviv_obj->pages, npages, 0);
881 drm_free_large(etnaviv_obj->pages);
883 put_task_struct(etnaviv_obj->userptr.task);
886 static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
887 struct vm_area_struct *vma)
892 static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = {
893 .get_pages = etnaviv_gem_userptr_get_pages,
894 .release = etnaviv_gem_userptr_release,
895 .vmap = etnaviv_gem_vmap_impl,
896 .mmap = etnaviv_gem_userptr_mmap_obj,
899 int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file,
900 uintptr_t ptr, u32 size, u32 flags, u32 *handle)
902 struct etnaviv_gem_object *etnaviv_obj;
905 ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL,
906 &etnaviv_gem_userptr_ops, &etnaviv_obj);
910 etnaviv_obj->userptr.ptr = ptr;
911 etnaviv_obj->userptr.task = current;
912 etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE);
913 get_task_struct(current);
915 ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
919 ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle);
921 /* drop reference from allocate - handle holds it now */
922 drm_gem_object_unreference_unlocked(&etnaviv_obj->base);