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_dbg(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_get(&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_put_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_get(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);
416 if (!etnaviv_obj->sgt) {
419 mutex_lock(&etnaviv_obj->lock);
420 ret = etnaviv_gem_get_pages(etnaviv_obj);
421 mutex_unlock(&etnaviv_obj->lock);
426 if (op & ETNA_PREP_NOSYNC) {
427 if (!reservation_object_test_signaled_rcu(etnaviv_obj->resv,
431 unsigned long remain = etnaviv_timeout_to_jiffies(timeout);
433 ret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv,
434 write, true, remain);
436 return ret == 0 ? -ETIMEDOUT : ret;
439 if (etnaviv_obj->flags & ETNA_BO_CACHED) {
440 dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl,
441 etnaviv_obj->sgt->nents,
442 etnaviv_op_to_dma_dir(op));
443 etnaviv_obj->last_cpu_prep_op = op;
449 int etnaviv_gem_cpu_fini(struct drm_gem_object *obj)
451 struct drm_device *dev = obj->dev;
452 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
454 if (etnaviv_obj->flags & ETNA_BO_CACHED) {
455 /* fini without a prep is almost certainly a userspace error */
456 WARN_ON(etnaviv_obj->last_cpu_prep_op == 0);
457 dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl,
458 etnaviv_obj->sgt->nents,
459 etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op));
460 etnaviv_obj->last_cpu_prep_op = 0;
466 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
467 struct timespec *timeout)
469 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
471 return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout);
474 #ifdef CONFIG_DEBUG_FS
475 static void etnaviv_gem_describe_fence(struct dma_fence *fence,
476 const char *type, struct seq_file *m)
478 if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
479 seq_printf(m, "\t%9s: %s %s seq %u\n",
481 fence->ops->get_driver_name(fence),
482 fence->ops->get_timeline_name(fence),
486 static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
488 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
489 struct reservation_object *robj = etnaviv_obj->resv;
490 struct reservation_object_list *fobj;
491 struct dma_fence *fence;
492 unsigned long off = drm_vma_node_start(&obj->vma_node);
494 seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n",
495 etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I',
496 obj->name, kref_read(&obj->refcount),
497 off, etnaviv_obj->vaddr, obj->size);
500 fobj = rcu_dereference(robj->fence);
502 unsigned int i, shared_count = fobj->shared_count;
504 for (i = 0; i < shared_count; i++) {
505 fence = rcu_dereference(fobj->shared[i]);
506 etnaviv_gem_describe_fence(fence, "Shared", m);
510 fence = rcu_dereference(robj->fence_excl);
512 etnaviv_gem_describe_fence(fence, "Exclusive", m);
516 void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,
519 struct etnaviv_gem_object *etnaviv_obj;
523 mutex_lock(&priv->gem_lock);
524 list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) {
525 struct drm_gem_object *obj = &etnaviv_obj->base;
528 etnaviv_gem_describe(obj, m);
532 mutex_unlock(&priv->gem_lock);
534 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
538 static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj)
540 vunmap(etnaviv_obj->vaddr);
541 put_pages(etnaviv_obj);
544 static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = {
545 .get_pages = etnaviv_gem_shmem_get_pages,
546 .release = etnaviv_gem_shmem_release,
547 .vmap = etnaviv_gem_vmap_impl,
548 .mmap = etnaviv_gem_mmap_obj,
551 void etnaviv_gem_free_object(struct drm_gem_object *obj)
553 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
554 struct etnaviv_vram_mapping *mapping, *tmp;
556 /* object should not be active */
557 WARN_ON(is_active(etnaviv_obj));
559 list_del(&etnaviv_obj->gem_node);
561 list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list,
563 struct etnaviv_iommu *mmu = mapping->mmu;
565 WARN_ON(mapping->use);
568 etnaviv_iommu_unmap_gem(mmu, mapping);
570 list_del(&mapping->obj_node);
574 drm_gem_free_mmap_offset(obj);
575 etnaviv_obj->ops->release(etnaviv_obj);
576 if (etnaviv_obj->resv == &etnaviv_obj->_resv)
577 reservation_object_fini(&etnaviv_obj->_resv);
578 drm_gem_object_release(obj);
583 int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj)
585 struct etnaviv_drm_private *priv = dev->dev_private;
586 struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
588 mutex_lock(&priv->gem_lock);
589 list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list);
590 mutex_unlock(&priv->gem_lock);
595 static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags,
596 struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
597 struct drm_gem_object **obj)
599 struct etnaviv_gem_object *etnaviv_obj;
600 unsigned sz = sizeof(*etnaviv_obj);
604 switch (flags & ETNA_BO_CACHE_MASK) {
605 case ETNA_BO_UNCACHED:
614 dev_err(dev->dev, "invalid cache flag: %x\n",
615 (flags & ETNA_BO_CACHE_MASK));
619 etnaviv_obj = kzalloc(sz, GFP_KERNEL);
623 etnaviv_obj->flags = flags;
624 etnaviv_obj->ops = ops;
626 etnaviv_obj->resv = robj;
628 etnaviv_obj->resv = &etnaviv_obj->_resv;
629 reservation_object_init(&etnaviv_obj->_resv);
632 mutex_init(&etnaviv_obj->lock);
633 INIT_LIST_HEAD(&etnaviv_obj->vram_list);
635 *obj = &etnaviv_obj->base;
640 static struct drm_gem_object *__etnaviv_gem_new(struct drm_device *dev,
643 struct drm_gem_object *obj = NULL;
646 size = PAGE_ALIGN(size);
648 ret = etnaviv_gem_new_impl(dev, size, flags, NULL,
649 &etnaviv_gem_shmem_ops, &obj);
653 ret = drm_gem_object_init(dev, obj, size);
655 struct address_space *mapping;
658 * Our buffers are kept pinned, so allocating them
659 * from the MOVABLE zone is a really bad idea, and
660 * conflicts with CMA. See coments above new_inode()
661 * why this is required _and_ expected if you're
662 * going to pin these pages.
664 mapping = obj->filp->f_mapping;
665 mapping_set_gfp_mask(mapping, GFP_HIGHUSER |
666 __GFP_RETRY_MAYFAIL | __GFP_NOWARN);
675 drm_gem_object_put_unlocked(obj);
679 /* convenience method to construct a GEM buffer object, and userspace handle */
680 int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file,
681 u32 size, u32 flags, u32 *handle)
683 struct drm_gem_object *obj;
686 obj = __etnaviv_gem_new(dev, size, flags);
690 ret = etnaviv_gem_obj_add(dev, obj);
692 drm_gem_object_put_unlocked(obj);
696 ret = drm_gem_handle_create(file, obj, handle);
698 /* drop reference from allocate - handle holds it now */
699 drm_gem_object_put_unlocked(obj);
704 struct drm_gem_object *etnaviv_gem_new(struct drm_device *dev,
707 struct drm_gem_object *obj;
710 obj = __etnaviv_gem_new(dev, size, flags);
714 ret = etnaviv_gem_obj_add(dev, obj);
716 drm_gem_object_put_unlocked(obj);
723 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
724 struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
725 struct etnaviv_gem_object **res)
727 struct drm_gem_object *obj;
730 ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj);
734 drm_gem_private_object_init(dev, obj, size);
736 *res = to_etnaviv_bo(obj);
741 struct get_pages_work {
742 struct work_struct work;
743 struct mm_struct *mm;
744 struct task_struct *task;
745 struct etnaviv_gem_object *etnaviv_obj;
748 static struct page **etnaviv_gem_userptr_do_get_pages(
749 struct etnaviv_gem_object *etnaviv_obj, struct mm_struct *mm, struct task_struct *task)
751 int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
754 unsigned int flags = 0;
756 pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
758 return ERR_PTR(-ENOMEM);
760 if (!etnaviv_obj->userptr.ro)
764 ptr = etnaviv_obj->userptr.ptr;
766 down_read(&mm->mmap_sem);
767 while (pinned < npages) {
768 ret = get_user_pages_remote(task, mm, ptr, npages - pinned,
769 flags, pvec + pinned, NULL, NULL);
773 ptr += ret * PAGE_SIZE;
776 up_read(&mm->mmap_sem);
779 release_pages(pvec, pinned, 0);
787 static void __etnaviv_gem_userptr_get_pages(struct work_struct *_work)
789 struct get_pages_work *work = container_of(_work, typeof(*work), work);
790 struct etnaviv_gem_object *etnaviv_obj = work->etnaviv_obj;
793 pvec = etnaviv_gem_userptr_do_get_pages(etnaviv_obj, work->mm, work->task);
795 mutex_lock(&etnaviv_obj->lock);
797 etnaviv_obj->userptr.work = ERR_CAST(pvec);
799 etnaviv_obj->userptr.work = NULL;
800 etnaviv_obj->pages = pvec;
803 mutex_unlock(&etnaviv_obj->lock);
804 drm_gem_object_put_unlocked(&etnaviv_obj->base);
807 put_task_struct(work->task);
811 static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj)
813 struct page **pvec = NULL;
814 struct get_pages_work *work;
815 struct mm_struct *mm;
816 int ret, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
818 if (etnaviv_obj->userptr.work) {
819 if (IS_ERR(etnaviv_obj->userptr.work)) {
820 ret = PTR_ERR(etnaviv_obj->userptr.work);
821 etnaviv_obj->userptr.work = NULL;
828 mm = get_task_mm(etnaviv_obj->userptr.task);
830 if (mm == current->mm) {
831 pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
837 pinned = __get_user_pages_fast(etnaviv_obj->userptr.ptr, npages,
838 !etnaviv_obj->userptr.ro, pvec);
845 if (pinned == npages) {
846 etnaviv_obj->pages = pvec;
852 release_pages(pvec, pinned, 0);
855 work = kmalloc(sizeof(*work), GFP_KERNEL);
861 get_task_struct(current);
862 drm_gem_object_get(&etnaviv_obj->base);
865 work->task = current;
866 work->etnaviv_obj = etnaviv_obj;
868 etnaviv_obj->userptr.work = &work->work;
869 INIT_WORK(&work->work, __etnaviv_gem_userptr_get_pages);
871 etnaviv_queue_work(etnaviv_obj->base.dev, &work->work);
876 static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj)
878 if (etnaviv_obj->sgt) {
879 etnaviv_gem_scatterlist_unmap(etnaviv_obj);
880 sg_free_table(etnaviv_obj->sgt);
881 kfree(etnaviv_obj->sgt);
883 if (etnaviv_obj->pages) {
884 int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
886 release_pages(etnaviv_obj->pages, npages, 0);
887 kvfree(etnaviv_obj->pages);
889 put_task_struct(etnaviv_obj->userptr.task);
892 static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
893 struct vm_area_struct *vma)
898 static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = {
899 .get_pages = etnaviv_gem_userptr_get_pages,
900 .release = etnaviv_gem_userptr_release,
901 .vmap = etnaviv_gem_vmap_impl,
902 .mmap = etnaviv_gem_userptr_mmap_obj,
905 int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file,
906 uintptr_t ptr, u32 size, u32 flags, u32 *handle)
908 struct etnaviv_gem_object *etnaviv_obj;
911 ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL,
912 &etnaviv_gem_userptr_ops, &etnaviv_obj);
916 etnaviv_obj->userptr.ptr = ptr;
917 etnaviv_obj->userptr.task = current;
918 etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE);
919 get_task_struct(current);
921 ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
925 ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle);
927 /* drop reference from allocate - handle holds it now */
928 drm_gem_object_put_unlocked(&etnaviv_obj->base);