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 drm_gem_object
*obj
,
133 struct vm_area_struct
*vma
)
135 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
136 pgprot_t vm_page_prot
;
138 vma
->vm_flags
&= ~VM_PFNMAP
;
139 vma
->vm_flags
|= VM_MIXEDMAP
;
141 vm_page_prot
= vm_get_page_prot(vma
->vm_flags
);
143 if (etnaviv_obj
->flags
& ETNA_BO_WC
) {
144 vma
->vm_page_prot
= pgprot_writecombine(vm_page_prot
);
145 } else if (etnaviv_obj
->flags
& ETNA_BO_UNCACHED
) {
146 vma
->vm_page_prot
= pgprot_noncached(vm_page_prot
);
149 * Shunt off cached objs to shmem file so they have their own
150 * address_space (so unmap_mapping_range does what we want,
151 * in particular in the case of mmap'd dmabufs)
156 vma
->vm_file
= obj
->filp
;
158 vma
->vm_page_prot
= vm_page_prot
;
164 int etnaviv_gem_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
166 struct etnaviv_gem_object
*obj
;
169 ret
= drm_gem_mmap(filp
, vma
);
171 DBG("mmap failed: %d", ret
);
175 obj
= to_etnaviv_bo(vma
->vm_private_data
);
176 return etnaviv_gem_mmap_obj(vma
->vm_private_data
, vma
);
179 int etnaviv_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
181 struct drm_gem_object
*obj
= vma
->vm_private_data
;
182 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
183 struct page
**pages
, *page
;
188 * Make sure we don't parallel update on a fault, nor move or remove
189 * something from beneath our feet. Note that vm_insert_page() is
190 * specifically coded to take care of this, so we don't have to.
192 ret
= mutex_lock_interruptible(&etnaviv_obj
->lock
);
196 /* make sure we have pages attached now */
197 pages
= etnaviv_gem_get_pages(etnaviv_obj
);
198 mutex_unlock(&etnaviv_obj
->lock
);
201 ret
= PTR_ERR(pages
);
205 /* We don't use vmf->pgoff since that has the fake offset: */
206 pgoff
= ((unsigned long)vmf
->virtual_address
-
207 vma
->vm_start
) >> PAGE_SHIFT
;
211 VERB("Inserting %p pfn %lx, pa %lx", vmf
->virtual_address
,
212 page_to_pfn(page
), page_to_pfn(page
) << PAGE_SHIFT
);
214 ret
= vm_insert_page(vma
, (unsigned long)vmf
->virtual_address
, page
);
224 * EBUSY is ok: this just means that another thread
225 * already did the job.
227 return VM_FAULT_NOPAGE
;
231 return VM_FAULT_SIGBUS
;
235 int etnaviv_gem_mmap_offset(struct drm_gem_object
*obj
, u64
*offset
)
239 /* Make it mmapable */
240 ret
= drm_gem_create_mmap_offset(obj
);
242 dev_err(obj
->dev
->dev
, "could not allocate mmap offset\n");
244 *offset
= drm_vma_node_offset_addr(&obj
->vma_node
);
249 static struct etnaviv_vram_mapping
*
250 etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object
*obj
,
251 struct etnaviv_iommu
*mmu
)
253 struct etnaviv_vram_mapping
*mapping
;
255 list_for_each_entry(mapping
, &obj
->vram_list
, obj_node
) {
256 if (mapping
->mmu
== mmu
)
263 int etnaviv_gem_get_iova(struct etnaviv_gpu
*gpu
,
264 struct drm_gem_object
*obj
, u32
*iova
)
266 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
267 struct etnaviv_vram_mapping
*mapping
;
271 mutex_lock(&etnaviv_obj
->lock
);
272 mapping
= etnaviv_gem_get_vram_mapping(etnaviv_obj
, gpu
->mmu
);
275 * Holding the object lock prevents the use count changing
276 * beneath us. If the use count is zero, the MMU might be
277 * reaping this object, so take the lock and re-check that
278 * the MMU owns this mapping to close this race.
280 if (mapping
->use
== 0) {
281 mutex_lock(&gpu
->mmu
->lock
);
282 if (mapping
->mmu
== gpu
->mmu
)
286 mutex_unlock(&gpu
->mmu
->lock
);
295 pages
= etnaviv_gem_get_pages(etnaviv_obj
);
297 ret
= PTR_ERR(pages
);
302 * See if we have a reaped vram mapping we can re-use before
303 * allocating a fresh mapping.
305 mapping
= etnaviv_gem_get_vram_mapping(etnaviv_obj
, NULL
);
307 mapping
= kzalloc(sizeof(*mapping
), GFP_KERNEL
);
311 INIT_LIST_HEAD(&mapping
->scan_node
);
312 mapping
->object
= etnaviv_obj
;
314 list_del(&mapping
->obj_node
);
317 mapping
->mmu
= gpu
->mmu
;
320 ret
= etnaviv_iommu_map_gem(gpu
->mmu
, etnaviv_obj
, gpu
->memory_base
,
325 list_add_tail(&mapping
->obj_node
, &etnaviv_obj
->vram_list
);
328 mutex_unlock(&etnaviv_obj
->lock
);
331 /* Take a reference on the object */
332 drm_gem_object_reference(obj
);
333 *iova
= mapping
->iova
;
339 void etnaviv_gem_put_iova(struct etnaviv_gpu
*gpu
, struct drm_gem_object
*obj
)
341 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
342 struct etnaviv_vram_mapping
*mapping
;
344 mutex_lock(&etnaviv_obj
->lock
);
345 mapping
= etnaviv_gem_get_vram_mapping(etnaviv_obj
, gpu
->mmu
);
347 WARN_ON(mapping
->use
== 0);
349 mutex_unlock(&etnaviv_obj
->lock
);
351 drm_gem_object_unreference_unlocked(obj
);
354 void *etnaviv_gem_vaddr(struct drm_gem_object
*obj
)
356 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
358 mutex_lock(&etnaviv_obj
->lock
);
359 if (!etnaviv_obj
->vaddr
) {
360 struct page
**pages
= etnaviv_gem_get_pages(etnaviv_obj
);
363 return ERR_CAST(pages
);
365 etnaviv_obj
->vaddr
= vmap(pages
, obj
->size
>> PAGE_SHIFT
,
366 VM_MAP
, pgprot_writecombine(PAGE_KERNEL
));
368 mutex_unlock(&etnaviv_obj
->lock
);
370 return etnaviv_obj
->vaddr
;
373 static inline enum dma_data_direction
etnaviv_op_to_dma_dir(u32 op
)
375 if (op
& ETNA_PREP_READ
)
376 return DMA_FROM_DEVICE
;
377 else if (op
& ETNA_PREP_WRITE
)
378 return DMA_TO_DEVICE
;
380 return DMA_BIDIRECTIONAL
;
383 int etnaviv_gem_cpu_prep(struct drm_gem_object
*obj
, u32 op
,
384 struct timespec
*timeout
)
386 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
387 struct drm_device
*dev
= obj
->dev
;
388 bool write
= !!(op
& ETNA_PREP_WRITE
);
391 if (op
& ETNA_PREP_NOSYNC
) {
392 if (!reservation_object_test_signaled_rcu(etnaviv_obj
->resv
,
396 unsigned long remain
= etnaviv_timeout_to_jiffies(timeout
);
398 ret
= reservation_object_wait_timeout_rcu(etnaviv_obj
->resv
,
399 write
, true, remain
);
401 return ret
== 0 ? -ETIMEDOUT
: ret
;
404 if (etnaviv_obj
->flags
& ETNA_BO_CACHED
) {
405 if (!etnaviv_obj
->sgt
) {
408 mutex_lock(&etnaviv_obj
->lock
);
409 ret
= etnaviv_gem_get_pages(etnaviv_obj
);
410 mutex_unlock(&etnaviv_obj
->lock
);
415 dma_sync_sg_for_cpu(dev
->dev
, etnaviv_obj
->sgt
->sgl
,
416 etnaviv_obj
->sgt
->nents
,
417 etnaviv_op_to_dma_dir(op
));
418 etnaviv_obj
->last_cpu_prep_op
= op
;
424 int etnaviv_gem_cpu_fini(struct drm_gem_object
*obj
)
426 struct drm_device
*dev
= obj
->dev
;
427 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
429 if (etnaviv_obj
->flags
& ETNA_BO_CACHED
) {
430 /* fini without a prep is almost certainly a userspace error */
431 WARN_ON(etnaviv_obj
->last_cpu_prep_op
== 0);
432 dma_sync_sg_for_device(dev
->dev
, etnaviv_obj
->sgt
->sgl
,
433 etnaviv_obj
->sgt
->nents
,
434 etnaviv_op_to_dma_dir(etnaviv_obj
->last_cpu_prep_op
));
435 etnaviv_obj
->last_cpu_prep_op
= 0;
441 int etnaviv_gem_wait_bo(struct etnaviv_gpu
*gpu
, struct drm_gem_object
*obj
,
442 struct timespec
*timeout
)
444 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
446 return etnaviv_gpu_wait_obj_inactive(gpu
, etnaviv_obj
, timeout
);
449 #ifdef CONFIG_DEBUG_FS
450 static void etnaviv_gem_describe_fence(struct fence
*fence
,
451 const char *type
, struct seq_file
*m
)
453 if (!test_bit(FENCE_FLAG_SIGNALED_BIT
, &fence
->flags
))
454 seq_printf(m
, "\t%9s: %s %s seq %u\n",
456 fence
->ops
->get_driver_name(fence
),
457 fence
->ops
->get_timeline_name(fence
),
461 static void etnaviv_gem_describe(struct drm_gem_object
*obj
, struct seq_file
*m
)
463 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
464 struct reservation_object
*robj
= etnaviv_obj
->resv
;
465 struct reservation_object_list
*fobj
;
467 unsigned long off
= drm_vma_node_start(&obj
->vma_node
);
469 seq_printf(m
, "%08x: %c %2d (%2d) %08lx %p %zd\n",
470 etnaviv_obj
->flags
, is_active(etnaviv_obj
) ? 'A' : 'I',
471 obj
->name
, obj
->refcount
.refcount
.counter
,
472 off
, etnaviv_obj
->vaddr
, obj
->size
);
475 fobj
= rcu_dereference(robj
->fence
);
477 unsigned int i
, shared_count
= fobj
->shared_count
;
479 for (i
= 0; i
< shared_count
; i
++) {
480 fence
= rcu_dereference(fobj
->shared
[i
]);
481 etnaviv_gem_describe_fence(fence
, "Shared", m
);
485 fence
= rcu_dereference(robj
->fence_excl
);
487 etnaviv_gem_describe_fence(fence
, "Exclusive", m
);
491 void etnaviv_gem_describe_objects(struct etnaviv_drm_private
*priv
,
494 struct etnaviv_gem_object
*etnaviv_obj
;
498 mutex_lock(&priv
->gem_lock
);
499 list_for_each_entry(etnaviv_obj
, &priv
->gem_list
, gem_node
) {
500 struct drm_gem_object
*obj
= &etnaviv_obj
->base
;
503 etnaviv_gem_describe(obj
, m
);
507 mutex_unlock(&priv
->gem_lock
);
509 seq_printf(m
, "Total %d objects, %zu bytes\n", count
, size
);
513 static void etnaviv_gem_shmem_release(struct etnaviv_gem_object
*etnaviv_obj
)
515 if (etnaviv_obj
->vaddr
)
516 vunmap(etnaviv_obj
->vaddr
);
517 put_pages(etnaviv_obj
);
520 static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops
= {
521 .get_pages
= etnaviv_gem_shmem_get_pages
,
522 .release
= etnaviv_gem_shmem_release
,
525 void etnaviv_gem_free_object(struct drm_gem_object
*obj
)
527 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
528 struct etnaviv_vram_mapping
*mapping
, *tmp
;
530 /* object should not be active */
531 WARN_ON(is_active(etnaviv_obj
));
533 list_del(&etnaviv_obj
->gem_node
);
535 list_for_each_entry_safe(mapping
, tmp
, &etnaviv_obj
->vram_list
,
537 struct etnaviv_iommu
*mmu
= mapping
->mmu
;
539 WARN_ON(mapping
->use
);
542 etnaviv_iommu_unmap_gem(mmu
, mapping
);
544 list_del(&mapping
->obj_node
);
548 drm_gem_free_mmap_offset(obj
);
549 etnaviv_obj
->ops
->release(etnaviv_obj
);
550 if (etnaviv_obj
->resv
== &etnaviv_obj
->_resv
)
551 reservation_object_fini(&etnaviv_obj
->_resv
);
552 drm_gem_object_release(obj
);
557 int etnaviv_gem_obj_add(struct drm_device
*dev
, struct drm_gem_object
*obj
)
559 struct etnaviv_drm_private
*priv
= dev
->dev_private
;
560 struct etnaviv_gem_object
*etnaviv_obj
= to_etnaviv_bo(obj
);
562 mutex_lock(&priv
->gem_lock
);
563 list_add_tail(&etnaviv_obj
->gem_node
, &priv
->gem_list
);
564 mutex_unlock(&priv
->gem_lock
);
569 static int etnaviv_gem_new_impl(struct drm_device
*dev
, u32 size
, u32 flags
,
570 struct reservation_object
*robj
, const struct etnaviv_gem_ops
*ops
,
571 struct drm_gem_object
**obj
)
573 struct etnaviv_gem_object
*etnaviv_obj
;
574 unsigned sz
= sizeof(*etnaviv_obj
);
578 switch (flags
& ETNA_BO_CACHE_MASK
) {
579 case ETNA_BO_UNCACHED
:
588 dev_err(dev
->dev
, "invalid cache flag: %x\n",
589 (flags
& ETNA_BO_CACHE_MASK
));
593 etnaviv_obj
= kzalloc(sz
, GFP_KERNEL
);
597 etnaviv_obj
->flags
= flags
;
598 etnaviv_obj
->ops
= ops
;
600 etnaviv_obj
->resv
= robj
;
602 etnaviv_obj
->resv
= &etnaviv_obj
->_resv
;
603 reservation_object_init(&etnaviv_obj
->_resv
);
606 mutex_init(&etnaviv_obj
->lock
);
607 INIT_LIST_HEAD(&etnaviv_obj
->vram_list
);
609 *obj
= &etnaviv_obj
->base
;
614 static struct drm_gem_object
*__etnaviv_gem_new(struct drm_device
*dev
,
617 struct drm_gem_object
*obj
= NULL
;
620 size
= PAGE_ALIGN(size
);
622 ret
= etnaviv_gem_new_impl(dev
, size
, flags
, NULL
,
623 &etnaviv_gem_shmem_ops
, &obj
);
627 ret
= drm_gem_object_init(dev
, obj
, size
);
629 struct address_space
*mapping
;
632 * Our buffers are kept pinned, so allocating them
633 * from the MOVABLE zone is a really bad idea, and
634 * conflicts with CMA. See coments above new_inode()
635 * why this is required _and_ expected if you're
636 * going to pin these pages.
638 mapping
= file_inode(obj
->filp
)->i_mapping
;
639 mapping_set_gfp_mask(mapping
, GFP_HIGHUSER
);
649 drm_gem_object_unreference_unlocked(obj
);
654 /* convenience method to construct a GEM buffer object, and userspace handle */
655 int etnaviv_gem_new_handle(struct drm_device
*dev
, struct drm_file
*file
,
656 u32 size
, u32 flags
, u32
*handle
)
658 struct drm_gem_object
*obj
;
661 obj
= __etnaviv_gem_new(dev
, size
, flags
);
665 ret
= etnaviv_gem_obj_add(dev
, obj
);
667 drm_gem_object_unreference_unlocked(obj
);
671 ret
= drm_gem_handle_create(file
, obj
, handle
);
673 /* drop reference from allocate - handle holds it now */
674 drm_gem_object_unreference_unlocked(obj
);
679 struct drm_gem_object
*etnaviv_gem_new(struct drm_device
*dev
,
682 struct drm_gem_object
*obj
;
685 obj
= __etnaviv_gem_new(dev
, size
, flags
);
689 ret
= etnaviv_gem_obj_add(dev
, obj
);
691 drm_gem_object_unreference_unlocked(obj
);
698 int etnaviv_gem_new_private(struct drm_device
*dev
, size_t size
, u32 flags
,
699 struct reservation_object
*robj
, const struct etnaviv_gem_ops
*ops
,
700 struct etnaviv_gem_object
**res
)
702 struct drm_gem_object
*obj
;
705 ret
= etnaviv_gem_new_impl(dev
, size
, flags
, robj
, ops
, &obj
);
709 drm_gem_private_object_init(dev
, obj
, size
);
711 *res
= to_etnaviv_bo(obj
);
716 struct get_pages_work
{
717 struct work_struct work
;
718 struct mm_struct
*mm
;
719 struct task_struct
*task
;
720 struct etnaviv_gem_object
*etnaviv_obj
;
723 static struct page
**etnaviv_gem_userptr_do_get_pages(
724 struct etnaviv_gem_object
*etnaviv_obj
, struct mm_struct
*mm
, struct task_struct
*task
)
726 int ret
= 0, pinned
, npages
= etnaviv_obj
->base
.size
>> PAGE_SHIFT
;
730 pvec
= drm_malloc_ab(npages
, sizeof(struct page
*));
732 return ERR_PTR(-ENOMEM
);
735 ptr
= etnaviv_obj
->userptr
.ptr
;
737 down_read(&mm
->mmap_sem
);
738 while (pinned
< npages
) {
739 ret
= get_user_pages(task
, mm
, ptr
, npages
- pinned
,
740 !etnaviv_obj
->userptr
.ro
, 0,
741 pvec
+ pinned
, NULL
);
745 ptr
+= ret
* PAGE_SIZE
;
748 up_read(&mm
->mmap_sem
);
751 release_pages(pvec
, pinned
, 0);
752 drm_free_large(pvec
);
759 static void __etnaviv_gem_userptr_get_pages(struct work_struct
*_work
)
761 struct get_pages_work
*work
= container_of(_work
, typeof(*work
), work
);
762 struct etnaviv_gem_object
*etnaviv_obj
= work
->etnaviv_obj
;
765 pvec
= etnaviv_gem_userptr_do_get_pages(etnaviv_obj
, work
->mm
, work
->task
);
767 mutex_lock(&etnaviv_obj
->lock
);
769 etnaviv_obj
->userptr
.work
= ERR_CAST(pvec
);
771 etnaviv_obj
->userptr
.work
= NULL
;
772 etnaviv_obj
->pages
= pvec
;
775 mutex_unlock(&etnaviv_obj
->lock
);
776 drm_gem_object_unreference_unlocked(&etnaviv_obj
->base
);
779 put_task_struct(work
->task
);
783 static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object
*etnaviv_obj
)
785 struct page
**pvec
= NULL
;
786 struct get_pages_work
*work
;
787 struct mm_struct
*mm
;
788 int ret
, pinned
, npages
= etnaviv_obj
->base
.size
>> PAGE_SHIFT
;
790 if (etnaviv_obj
->userptr
.work
) {
791 if (IS_ERR(etnaviv_obj
->userptr
.work
)) {
792 ret
= PTR_ERR(etnaviv_obj
->userptr
.work
);
793 etnaviv_obj
->userptr
.work
= NULL
;
800 mm
= get_task_mm(etnaviv_obj
->userptr
.task
);
802 if (mm
== current
->mm
) {
803 pvec
= drm_malloc_ab(npages
, sizeof(struct page
*));
809 pinned
= __get_user_pages_fast(etnaviv_obj
->userptr
.ptr
, npages
,
810 !etnaviv_obj
->userptr
.ro
, pvec
);
812 drm_free_large(pvec
);
817 if (pinned
== npages
) {
818 etnaviv_obj
->pages
= pvec
;
824 release_pages(pvec
, pinned
, 0);
825 drm_free_large(pvec
);
827 work
= kmalloc(sizeof(*work
), GFP_KERNEL
);
833 get_task_struct(current
);
834 drm_gem_object_reference(&etnaviv_obj
->base
);
837 work
->task
= current
;
838 work
->etnaviv_obj
= etnaviv_obj
;
840 etnaviv_obj
->userptr
.work
= &work
->work
;
841 INIT_WORK(&work
->work
, __etnaviv_gem_userptr_get_pages
);
843 etnaviv_queue_work(etnaviv_obj
->base
.dev
, &work
->work
);
848 static void etnaviv_gem_userptr_release(struct etnaviv_gem_object
*etnaviv_obj
)
850 if (etnaviv_obj
->sgt
) {
851 etnaviv_gem_scatterlist_unmap(etnaviv_obj
);
852 sg_free_table(etnaviv_obj
->sgt
);
853 kfree(etnaviv_obj
->sgt
);
855 if (etnaviv_obj
->pages
) {
856 int npages
= etnaviv_obj
->base
.size
>> PAGE_SHIFT
;
858 release_pages(etnaviv_obj
->pages
, npages
, 0);
859 drm_free_large(etnaviv_obj
->pages
);
861 put_task_struct(etnaviv_obj
->userptr
.task
);
864 static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops
= {
865 .get_pages
= etnaviv_gem_userptr_get_pages
,
866 .release
= etnaviv_gem_userptr_release
,
869 int etnaviv_gem_new_userptr(struct drm_device
*dev
, struct drm_file
*file
,
870 uintptr_t ptr
, u32 size
, u32 flags
, u32
*handle
)
872 struct etnaviv_gem_object
*etnaviv_obj
;
875 ret
= etnaviv_gem_new_private(dev
, size
, ETNA_BO_CACHED
, NULL
,
876 &etnaviv_gem_userptr_ops
, &etnaviv_obj
);
880 etnaviv_obj
->userptr
.ptr
= ptr
;
881 etnaviv_obj
->userptr
.task
= current
;
882 etnaviv_obj
->userptr
.ro
= !(flags
& ETNA_USERPTR_WRITE
);
883 get_task_struct(current
);
885 ret
= etnaviv_gem_obj_add(dev
, &etnaviv_obj
->base
);
887 drm_gem_object_unreference_unlocked(&etnaviv_obj
->base
);
891 ret
= drm_gem_handle_create(file
, &etnaviv_obj
->base
, handle
);
893 /* drop reference from allocate - handle holds it now */
894 drm_gem_object_unreference_unlocked(&etnaviv_obj
->base
);