2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
18 #include <linux/spinlock.h>
19 #include <linux/shmem_fs.h>
20 #include <linux/dma-buf.h>
21 #include <linux/pfn_t.h>
24 #include "msm_fence.h"
29 static void msm_gem_vunmap_locked(struct drm_gem_object *obj);
32 static dma_addr_t physaddr(struct drm_gem_object *obj)
34 struct msm_gem_object *msm_obj = to_msm_bo(obj);
35 struct msm_drm_private *priv = obj->dev->dev_private;
36 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) +
40 static bool use_pages(struct drm_gem_object *obj)
42 struct msm_gem_object *msm_obj = to_msm_bo(obj);
43 return !msm_obj->vram_node;
46 /* allocate pages from VRAM carveout, used when no IOMMU: */
47 static struct page **get_pages_vram(struct drm_gem_object *obj, int npages)
49 struct msm_gem_object *msm_obj = to_msm_bo(obj);
50 struct msm_drm_private *priv = obj->dev->dev_private;
55 p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
57 return ERR_PTR(-ENOMEM);
59 spin_lock(&priv->vram.lock);
60 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages);
61 spin_unlock(&priv->vram.lock);
67 paddr = physaddr(obj);
68 for (i = 0; i < npages; i++) {
69 p[i] = phys_to_page(paddr);
76 static struct page **get_pages(struct drm_gem_object *obj)
78 struct msm_gem_object *msm_obj = to_msm_bo(obj);
80 if (!msm_obj->pages) {
81 struct drm_device *dev = obj->dev;
83 int npages = obj->size >> PAGE_SHIFT;
86 p = drm_gem_get_pages(obj);
88 p = get_pages_vram(obj, npages);
91 dev_err(dev->dev, "could not get pages: %ld\n",
96 msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
97 if (IS_ERR(msm_obj->sgt)) {
98 dev_err(dev->dev, "failed to allocate sgt\n");
99 return ERR_CAST(msm_obj->sgt);
104 /* For non-cached buffers, ensure the new pages are clean
105 * because display controller, GPU, etc. are not coherent:
107 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
108 dma_map_sg(dev->dev, msm_obj->sgt->sgl,
109 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
112 return msm_obj->pages;
115 static void put_pages_vram(struct drm_gem_object *obj)
117 struct msm_gem_object *msm_obj = to_msm_bo(obj);
118 struct msm_drm_private *priv = obj->dev->dev_private;
120 spin_lock(&priv->vram.lock);
121 drm_mm_remove_node(msm_obj->vram_node);
122 spin_unlock(&priv->vram.lock);
124 kvfree(msm_obj->pages);
127 static void put_pages(struct drm_gem_object *obj)
129 struct msm_gem_object *msm_obj = to_msm_bo(obj);
131 if (msm_obj->pages) {
132 /* For non-cached buffers, ensure the new pages are clean
133 * because display controller, GPU, etc. are not coherent:
135 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
136 dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
137 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
138 sg_free_table(msm_obj->sgt);
142 drm_gem_put_pages(obj, msm_obj->pages, true, false);
146 msm_obj->pages = NULL;
150 struct page **msm_gem_get_pages(struct drm_gem_object *obj)
152 struct msm_gem_object *msm_obj = to_msm_bo(obj);
155 mutex_lock(&msm_obj->lock);
157 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
158 mutex_unlock(&msm_obj->lock);
159 return ERR_PTR(-EBUSY);
163 mutex_unlock(&msm_obj->lock);
167 void msm_gem_put_pages(struct drm_gem_object *obj)
169 /* when we start tracking the pin count, then do something here */
172 int msm_gem_mmap_obj(struct drm_gem_object *obj,
173 struct vm_area_struct *vma)
175 struct msm_gem_object *msm_obj = to_msm_bo(obj);
177 vma->vm_flags &= ~VM_PFNMAP;
178 vma->vm_flags |= VM_MIXEDMAP;
180 if (msm_obj->flags & MSM_BO_WC) {
181 vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
182 } else if (msm_obj->flags & MSM_BO_UNCACHED) {
183 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
186 * Shunt off cached objs to shmem file so they have their own
187 * address_space (so unmap_mapping_range does what we want,
188 * in particular in the case of mmap'd dmabufs)
193 vma->vm_file = obj->filp;
195 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
201 int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
205 ret = drm_gem_mmap(filp, vma);
207 DBG("mmap failed: %d", ret);
211 return msm_gem_mmap_obj(vma->vm_private_data, vma);
214 int msm_gem_fault(struct vm_fault *vmf)
216 struct vm_area_struct *vma = vmf->vma;
217 struct drm_gem_object *obj = vma->vm_private_data;
218 struct msm_gem_object *msm_obj = to_msm_bo(obj);
225 * vm_ops.open/drm_gem_mmap_obj and close get and put
226 * a reference on obj. So, we dont need to hold one here.
228 ret = mutex_lock_interruptible(&msm_obj->lock);
232 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
233 mutex_unlock(&msm_obj->lock);
234 return VM_FAULT_SIGBUS;
237 /* make sure we have pages attached now */
238 pages = get_pages(obj);
240 ret = PTR_ERR(pages);
244 /* We don't use vmf->pgoff since that has the fake offset: */
245 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
247 pfn = page_to_pfn(pages[pgoff]);
249 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
250 pfn, pfn << PAGE_SHIFT);
252 ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
255 mutex_unlock(&msm_obj->lock);
264 * EBUSY is ok: this just means that another thread
265 * already did the job.
267 return VM_FAULT_NOPAGE;
271 return VM_FAULT_SIGBUS;
275 /** get mmap offset */
276 static uint64_t mmap_offset(struct drm_gem_object *obj)
278 struct drm_device *dev = obj->dev;
279 struct msm_gem_object *msm_obj = to_msm_bo(obj);
282 WARN_ON(!mutex_is_locked(&msm_obj->lock));
284 /* Make it mmapable */
285 ret = drm_gem_create_mmap_offset(obj);
288 dev_err(dev->dev, "could not allocate mmap offset\n");
292 return drm_vma_node_offset_addr(&obj->vma_node);
295 uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
298 struct msm_gem_object *msm_obj = to_msm_bo(obj);
300 mutex_lock(&msm_obj->lock);
301 offset = mmap_offset(obj);
302 mutex_unlock(&msm_obj->lock);
306 static struct msm_gem_vma *add_vma(struct drm_gem_object *obj,
307 struct msm_gem_address_space *aspace)
309 struct msm_gem_object *msm_obj = to_msm_bo(obj);
310 struct msm_gem_vma *vma;
312 WARN_ON(!mutex_is_locked(&msm_obj->lock));
314 vma = kzalloc(sizeof(*vma), GFP_KERNEL);
316 return ERR_PTR(-ENOMEM);
318 vma->aspace = aspace;
320 list_add_tail(&vma->list, &msm_obj->vmas);
325 static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj,
326 struct msm_gem_address_space *aspace)
328 struct msm_gem_object *msm_obj = to_msm_bo(obj);
329 struct msm_gem_vma *vma;
331 WARN_ON(!mutex_is_locked(&msm_obj->lock));
333 list_for_each_entry(vma, &msm_obj->vmas, list) {
334 if (vma->aspace == aspace)
341 static void del_vma(struct msm_gem_vma *vma)
346 list_del(&vma->list);
350 /* Called with msm_obj->lock locked */
352 put_iova(struct drm_gem_object *obj)
354 struct msm_gem_object *msm_obj = to_msm_bo(obj);
355 struct msm_gem_vma *vma, *tmp;
357 WARN_ON(!mutex_is_locked(&msm_obj->lock));
359 list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) {
360 msm_gem_unmap_vma(vma->aspace, vma, msm_obj->sgt);
365 /* get iova, taking a reference. Should have a matching put */
366 int msm_gem_get_iova(struct drm_gem_object *obj,
367 struct msm_gem_address_space *aspace, uint64_t *iova)
369 struct msm_gem_object *msm_obj = to_msm_bo(obj);
370 struct msm_gem_vma *vma;
373 mutex_lock(&msm_obj->lock);
375 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
376 mutex_unlock(&msm_obj->lock);
380 vma = lookup_vma(obj, aspace);
385 vma = add_vma(obj, aspace);
389 pages = get_pages(obj);
391 ret = PTR_ERR(pages);
395 ret = msm_gem_map_vma(aspace, vma, msm_obj->sgt,
396 obj->size >> PAGE_SHIFT);
403 mutex_unlock(&msm_obj->lock);
409 mutex_unlock(&msm_obj->lock);
413 /* get iova without taking a reference, used in places where you have
414 * already done a 'msm_gem_get_iova()'.
416 uint64_t msm_gem_iova(struct drm_gem_object *obj,
417 struct msm_gem_address_space *aspace)
419 struct msm_gem_object *msm_obj = to_msm_bo(obj);
420 struct msm_gem_vma *vma;
422 mutex_lock(&msm_obj->lock);
423 vma = lookup_vma(obj, aspace);
424 mutex_unlock(&msm_obj->lock);
427 return vma ? vma->iova : 0;
430 void msm_gem_put_iova(struct drm_gem_object *obj,
431 struct msm_gem_address_space *aspace)
434 // NOTE: probably don't need a _locked() version.. we wouldn't
435 // normally unmap here, but instead just mark that it could be
436 // unmapped (if the iova refcnt drops to zero), but then later
437 // if another _get_iova_locked() fails we can start unmapping
438 // things that are no longer needed..
441 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
442 struct drm_mode_create_dumb *args)
444 args->pitch = align_pitch(args->width, args->bpp);
445 args->size = PAGE_ALIGN(args->pitch * args->height);
446 return msm_gem_new_handle(dev, file, args->size,
447 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle);
450 int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
451 uint32_t handle, uint64_t *offset)
453 struct drm_gem_object *obj;
456 /* GEM does all our handle to object mapping */
457 obj = drm_gem_object_lookup(file, handle);
463 *offset = msm_gem_mmap_offset(obj);
465 drm_gem_object_unreference_unlocked(obj);
471 void *msm_gem_get_vaddr(struct drm_gem_object *obj)
473 struct msm_gem_object *msm_obj = to_msm_bo(obj);
476 mutex_lock(&msm_obj->lock);
478 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
479 mutex_unlock(&msm_obj->lock);
480 return ERR_PTR(-EBUSY);
483 /* increment vmap_count *before* vmap() call, so shrinker can
484 * check vmap_count (is_vunmapable()) outside of msm_obj->lock.
485 * This guarantees that we won't try to msm_gem_vunmap() this
486 * same object from within the vmap() call (while we already
487 * hold msm_obj->lock)
489 msm_obj->vmap_count++;
491 if (!msm_obj->vaddr) {
492 struct page **pages = get_pages(obj);
494 ret = PTR_ERR(pages);
497 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
498 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
499 if (msm_obj->vaddr == NULL) {
505 mutex_unlock(&msm_obj->lock);
506 return msm_obj->vaddr;
509 msm_obj->vmap_count--;
510 mutex_unlock(&msm_obj->lock);
514 void msm_gem_put_vaddr(struct drm_gem_object *obj)
516 struct msm_gem_object *msm_obj = to_msm_bo(obj);
518 mutex_lock(&msm_obj->lock);
519 WARN_ON(msm_obj->vmap_count < 1);
520 msm_obj->vmap_count--;
521 mutex_unlock(&msm_obj->lock);
524 /* Update madvise status, returns true if not purged, else
527 int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv)
529 struct msm_gem_object *msm_obj = to_msm_bo(obj);
531 mutex_lock(&msm_obj->lock);
533 WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
535 if (msm_obj->madv != __MSM_MADV_PURGED)
536 msm_obj->madv = madv;
538 madv = msm_obj->madv;
540 mutex_unlock(&msm_obj->lock);
542 return (madv != __MSM_MADV_PURGED);
545 void msm_gem_purge(struct drm_gem_object *obj, enum msm_gem_lock subclass)
547 struct drm_device *dev = obj->dev;
548 struct msm_gem_object *msm_obj = to_msm_bo(obj);
550 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
551 WARN_ON(!is_purgeable(msm_obj));
552 WARN_ON(obj->import_attach);
554 mutex_lock_nested(&msm_obj->lock, subclass);
558 msm_gem_vunmap_locked(obj);
562 msm_obj->madv = __MSM_MADV_PURGED;
564 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
565 drm_gem_free_mmap_offset(obj);
567 /* Our goal here is to return as much of the memory as
568 * is possible back to the system as we are called from OOM.
569 * To do this we must instruct the shmfs to drop all of its
570 * backing pages, *now*.
572 shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1);
574 invalidate_mapping_pages(file_inode(obj->filp)->i_mapping,
577 mutex_unlock(&msm_obj->lock);
580 static void msm_gem_vunmap_locked(struct drm_gem_object *obj)
582 struct msm_gem_object *msm_obj = to_msm_bo(obj);
584 WARN_ON(!mutex_is_locked(&msm_obj->lock));
586 if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj)))
589 vunmap(msm_obj->vaddr);
590 msm_obj->vaddr = NULL;
593 void msm_gem_vunmap(struct drm_gem_object *obj, enum msm_gem_lock subclass)
595 struct msm_gem_object *msm_obj = to_msm_bo(obj);
597 mutex_lock_nested(&msm_obj->lock, subclass);
598 msm_gem_vunmap_locked(obj);
599 mutex_unlock(&msm_obj->lock);
602 /* must be called before _move_to_active().. */
603 int msm_gem_sync_object(struct drm_gem_object *obj,
604 struct msm_fence_context *fctx, bool exclusive)
606 struct msm_gem_object *msm_obj = to_msm_bo(obj);
607 struct reservation_object_list *fobj;
608 struct dma_fence *fence;
612 /* NOTE: _reserve_shared() must happen before _add_shared_fence(),
613 * which makes this a slightly strange place to call it. OTOH this
614 * is a convenient can-fail point to hook it in. (And similar to
615 * how etnaviv and nouveau handle this.)
617 ret = reservation_object_reserve_shared(msm_obj->resv);
622 fobj = reservation_object_get_list(msm_obj->resv);
623 if (!fobj || (fobj->shared_count == 0)) {
624 fence = reservation_object_get_excl(msm_obj->resv);
625 /* don't need to wait on our own fences, since ring is fifo */
626 if (fence && (fence->context != fctx->context)) {
627 ret = dma_fence_wait(fence, true);
633 if (!exclusive || !fobj)
636 for (i = 0; i < fobj->shared_count; i++) {
637 fence = rcu_dereference_protected(fobj->shared[i],
638 reservation_object_held(msm_obj->resv));
639 if (fence->context != fctx->context) {
640 ret = dma_fence_wait(fence, true);
649 void msm_gem_move_to_active(struct drm_gem_object *obj,
650 struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence)
652 struct msm_gem_object *msm_obj = to_msm_bo(obj);
653 WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED);
656 reservation_object_add_excl_fence(msm_obj->resv, fence);
658 reservation_object_add_shared_fence(msm_obj->resv, fence);
659 list_del_init(&msm_obj->mm_list);
660 list_add_tail(&msm_obj->mm_list, &gpu->active_list);
663 void msm_gem_move_to_inactive(struct drm_gem_object *obj)
665 struct drm_device *dev = obj->dev;
666 struct msm_drm_private *priv = dev->dev_private;
667 struct msm_gem_object *msm_obj = to_msm_bo(obj);
669 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
672 list_del_init(&msm_obj->mm_list);
673 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
676 int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout)
678 struct msm_gem_object *msm_obj = to_msm_bo(obj);
679 bool write = !!(op & MSM_PREP_WRITE);
680 unsigned long remain =
681 op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout);
684 ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write,
687 return remain == 0 ? -EBUSY : -ETIMEDOUT;
691 /* TODO cache maintenance */
696 int msm_gem_cpu_fini(struct drm_gem_object *obj)
698 /* TODO cache maintenance */
702 #ifdef CONFIG_DEBUG_FS
703 static void describe_fence(struct dma_fence *fence, const char *type,
706 if (!dma_fence_is_signaled(fence))
707 seq_printf(m, "\t%9s: %s %s seq %u\n", type,
708 fence->ops->get_driver_name(fence),
709 fence->ops->get_timeline_name(fence),
713 void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
715 struct msm_gem_object *msm_obj = to_msm_bo(obj);
716 struct reservation_object *robj = msm_obj->resv;
717 struct reservation_object_list *fobj;
718 struct dma_fence *fence;
719 struct msm_gem_vma *vma;
720 uint64_t off = drm_vma_node_start(&obj->vma_node);
723 mutex_lock(&msm_obj->lock);
725 switch (msm_obj->madv) {
726 case __MSM_MADV_PURGED:
729 case MSM_MADV_DONTNEED:
732 case MSM_MADV_WILLNEED:
738 seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t",
739 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I',
740 obj->name, kref_read(&obj->refcount),
741 off, msm_obj->vaddr);
743 /* FIXME: we need to print the address space here too */
744 list_for_each_entry(vma, &msm_obj->vmas, list)
745 seq_printf(m, " %08llx", vma->iova);
747 seq_printf(m, " %zu%s\n", obj->size, madv);
750 fobj = rcu_dereference(robj->fence);
752 unsigned int i, shared_count = fobj->shared_count;
754 for (i = 0; i < shared_count; i++) {
755 fence = rcu_dereference(fobj->shared[i]);
756 describe_fence(fence, "Shared", m);
760 fence = rcu_dereference(robj->fence_excl);
762 describe_fence(fence, "Exclusive", m);
765 mutex_unlock(&msm_obj->lock);
768 void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
770 struct msm_gem_object *msm_obj;
774 list_for_each_entry(msm_obj, list, mm_list) {
775 struct drm_gem_object *obj = &msm_obj->base;
777 msm_gem_describe(obj, m);
782 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
786 void msm_gem_free_object(struct drm_gem_object *obj)
788 struct drm_device *dev = obj->dev;
789 struct msm_gem_object *msm_obj = to_msm_bo(obj);
791 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
793 /* object should not be on active list: */
794 WARN_ON(is_active(msm_obj));
796 list_del(&msm_obj->mm_list);
798 mutex_lock(&msm_obj->lock);
802 if (obj->import_attach) {
804 dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr);
806 /* Don't drop the pages for imported dmabuf, as they are not
807 * ours, just free the array we allocated:
810 kvfree(msm_obj->pages);
812 drm_prime_gem_destroy(obj, msm_obj->sgt);
814 msm_gem_vunmap_locked(obj);
818 if (msm_obj->resv == &msm_obj->_resv)
819 reservation_object_fini(msm_obj->resv);
821 drm_gem_object_release(obj);
823 mutex_unlock(&msm_obj->lock);
827 /* convenience method to construct a GEM buffer object, and userspace handle */
828 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
829 uint32_t size, uint32_t flags, uint32_t *handle)
831 struct drm_gem_object *obj;
834 obj = msm_gem_new(dev, size, flags);
839 ret = drm_gem_handle_create(file, obj, handle);
841 /* drop reference from allocate - handle holds it now */
842 drm_gem_object_unreference_unlocked(obj);
847 static int msm_gem_new_impl(struct drm_device *dev,
848 uint32_t size, uint32_t flags,
849 struct reservation_object *resv,
850 struct drm_gem_object **obj,
851 bool struct_mutex_locked)
853 struct msm_drm_private *priv = dev->dev_private;
854 struct msm_gem_object *msm_obj;
856 switch (flags & MSM_BO_CACHE_MASK) {
857 case MSM_BO_UNCACHED:
862 dev_err(dev->dev, "invalid cache flag: %x\n",
863 (flags & MSM_BO_CACHE_MASK));
867 msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL);
871 mutex_init(&msm_obj->lock);
873 msm_obj->flags = flags;
874 msm_obj->madv = MSM_MADV_WILLNEED;
877 msm_obj->resv = resv;
879 msm_obj->resv = &msm_obj->_resv;
880 reservation_object_init(msm_obj->resv);
883 INIT_LIST_HEAD(&msm_obj->submit_entry);
884 INIT_LIST_HEAD(&msm_obj->vmas);
886 if (struct_mutex_locked) {
887 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
888 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
890 mutex_lock(&dev->struct_mutex);
891 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
892 mutex_unlock(&dev->struct_mutex);
895 *obj = &msm_obj->base;
900 static struct drm_gem_object *_msm_gem_new(struct drm_device *dev,
901 uint32_t size, uint32_t flags, bool struct_mutex_locked)
903 struct msm_drm_private *priv = dev->dev_private;
904 struct drm_gem_object *obj = NULL;
905 bool use_vram = false;
908 size = PAGE_ALIGN(size);
910 if (!iommu_present(&platform_bus_type))
912 else if ((flags & MSM_BO_STOLEN) && priv->vram.size)
915 if (WARN_ON(use_vram && !priv->vram.size))
916 return ERR_PTR(-EINVAL);
918 /* Disallow zero sized objects as they make the underlying
919 * infrastructure grumpy
922 return ERR_PTR(-EINVAL);
924 ret = msm_gem_new_impl(dev, size, flags, NULL, &obj, struct_mutex_locked);
929 struct msm_gem_vma *vma;
932 vma = add_vma(obj, NULL);
938 to_msm_bo(obj)->vram_node = &vma->node;
940 drm_gem_private_object_init(dev, obj, size);
942 pages = get_pages(obj);
944 ret = PTR_ERR(pages);
948 vma->iova = physaddr(obj);
950 ret = drm_gem_object_init(dev, obj, size);
958 drm_gem_object_unreference_unlocked(obj);
962 struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev,
963 uint32_t size, uint32_t flags)
965 return _msm_gem_new(dev, size, flags, true);
968 struct drm_gem_object *msm_gem_new(struct drm_device *dev,
969 uint32_t size, uint32_t flags)
971 return _msm_gem_new(dev, size, flags, false);
974 struct drm_gem_object *msm_gem_import(struct drm_device *dev,
975 struct dma_buf *dmabuf, struct sg_table *sgt)
977 struct msm_gem_object *msm_obj;
978 struct drm_gem_object *obj;
982 /* if we don't have IOMMU, don't bother pretending we can import: */
983 if (!iommu_present(&platform_bus_type)) {
984 dev_err(dev->dev, "cannot import without IOMMU\n");
985 return ERR_PTR(-EINVAL);
988 size = PAGE_ALIGN(dmabuf->size);
990 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj, false);
994 drm_gem_private_object_init(dev, obj, size);
996 npages = size / PAGE_SIZE;
998 msm_obj = to_msm_bo(obj);
999 mutex_lock(&msm_obj->lock);
1001 msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
1002 if (!msm_obj->pages) {
1003 mutex_unlock(&msm_obj->lock);
1008 ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages);
1010 mutex_unlock(&msm_obj->lock);
1014 mutex_unlock(&msm_obj->lock);
1018 drm_gem_object_unreference_unlocked(obj);
1019 return ERR_PTR(ret);