1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
7 #include <linux/dma-map-ops.h>
8 #include <linux/spinlock.h>
9 #include <linux/shmem_fs.h>
10 #include <linux/dma-buf.h>
11 #include <linux/pfn_t.h>
13 #include <drm/drm_prime.h>
16 #include "msm_fence.h"
21 static void update_inactive(struct msm_gem_object *msm_obj);
23 static dma_addr_t physaddr(struct drm_gem_object *obj)
25 struct msm_gem_object *msm_obj = to_msm_bo(obj);
26 struct msm_drm_private *priv = obj->dev->dev_private;
27 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) +
31 static bool use_pages(struct drm_gem_object *obj)
33 struct msm_gem_object *msm_obj = to_msm_bo(obj);
34 return !msm_obj->vram_node;
38 * Cache sync.. this is a bit over-complicated, to fit dma-mapping
39 * API. Really GPU cache is out of scope here (handled on cmdstream)
40 * and all we need to do is invalidate newly allocated pages before
41 * mapping to CPU as uncached/writecombine.
43 * On top of this, we have the added headache, that depending on
44 * display generation, the display's iommu may be wired up to either
45 * the toplevel drm device (mdss), or to the mdp sub-node, meaning
46 * that here we either have dma-direct or iommu ops.
48 * Let this be a cautionary tail of abstraction gone wrong.
51 static void sync_for_device(struct msm_gem_object *msm_obj)
53 struct device *dev = msm_obj->base.dev->dev;
55 dma_map_sgtable(dev, msm_obj->sgt, DMA_BIDIRECTIONAL, 0);
58 static void sync_for_cpu(struct msm_gem_object *msm_obj)
60 struct device *dev = msm_obj->base.dev->dev;
62 dma_unmap_sgtable(dev, msm_obj->sgt, DMA_BIDIRECTIONAL, 0);
65 /* allocate pages from VRAM carveout, used when no IOMMU: */
66 static struct page **get_pages_vram(struct drm_gem_object *obj, int npages)
68 struct msm_gem_object *msm_obj = to_msm_bo(obj);
69 struct msm_drm_private *priv = obj->dev->dev_private;
74 p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
76 return ERR_PTR(-ENOMEM);
78 spin_lock(&priv->vram.lock);
79 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages);
80 spin_unlock(&priv->vram.lock);
86 paddr = physaddr(obj);
87 for (i = 0; i < npages; i++) {
88 p[i] = phys_to_page(paddr);
95 static struct page **get_pages(struct drm_gem_object *obj)
97 struct msm_gem_object *msm_obj = to_msm_bo(obj);
99 GEM_WARN_ON(!msm_gem_is_locked(obj));
101 if (!msm_obj->pages) {
102 struct drm_device *dev = obj->dev;
104 int npages = obj->size >> PAGE_SHIFT;
107 p = drm_gem_get_pages(obj);
109 p = get_pages_vram(obj, npages);
112 DRM_DEV_ERROR(dev->dev, "could not get pages: %ld\n",
119 msm_obj->sgt = drm_prime_pages_to_sg(obj->dev, p, npages);
120 if (IS_ERR(msm_obj->sgt)) {
121 void *ptr = ERR_CAST(msm_obj->sgt);
123 DRM_DEV_ERROR(dev->dev, "failed to allocate sgt\n");
128 /* For non-cached buffers, ensure the new pages are clean
129 * because display controller, GPU, etc. are not coherent:
131 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
132 sync_for_device(msm_obj);
134 update_inactive(msm_obj);
137 return msm_obj->pages;
140 static void put_pages_vram(struct drm_gem_object *obj)
142 struct msm_gem_object *msm_obj = to_msm_bo(obj);
143 struct msm_drm_private *priv = obj->dev->dev_private;
145 spin_lock(&priv->vram.lock);
146 drm_mm_remove_node(msm_obj->vram_node);
147 spin_unlock(&priv->vram.lock);
149 kvfree(msm_obj->pages);
152 static void put_pages(struct drm_gem_object *obj)
154 struct msm_gem_object *msm_obj = to_msm_bo(obj);
156 if (msm_obj->pages) {
158 /* For non-cached buffers, ensure the new
159 * pages are clean because display controller,
160 * GPU, etc. are not coherent:
162 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
163 sync_for_cpu(msm_obj);
165 sg_free_table(msm_obj->sgt);
171 drm_gem_put_pages(obj, msm_obj->pages, true, false);
175 msm_obj->pages = NULL;
179 struct page **msm_gem_get_pages(struct drm_gem_object *obj)
181 struct msm_gem_object *msm_obj = to_msm_bo(obj);
186 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
188 return ERR_PTR(-EBUSY);
194 msm_obj->pin_count++;
195 update_inactive(msm_obj);
202 void msm_gem_put_pages(struct drm_gem_object *obj)
204 struct msm_gem_object *msm_obj = to_msm_bo(obj);
207 msm_obj->pin_count--;
208 GEM_WARN_ON(msm_obj->pin_count < 0);
209 update_inactive(msm_obj);
213 static pgprot_t msm_gem_pgprot(struct msm_gem_object *msm_obj, pgprot_t prot)
215 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
216 return pgprot_writecombine(prot);
220 int msm_gem_mmap_obj(struct drm_gem_object *obj,
221 struct vm_area_struct *vma)
223 struct msm_gem_object *msm_obj = to_msm_bo(obj);
225 vma->vm_flags &= ~VM_PFNMAP;
226 vma->vm_flags |= VM_MIXEDMAP;
227 vma->vm_page_prot = msm_gem_pgprot(msm_obj, vm_get_page_prot(vma->vm_flags));
232 int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
236 ret = drm_gem_mmap(filp, vma);
238 DBG("mmap failed: %d", ret);
242 return msm_gem_mmap_obj(vma->vm_private_data, vma);
245 static vm_fault_t msm_gem_fault(struct vm_fault *vmf)
247 struct vm_area_struct *vma = vmf->vma;
248 struct drm_gem_object *obj = vma->vm_private_data;
249 struct msm_gem_object *msm_obj = to_msm_bo(obj);
257 * vm_ops.open/drm_gem_mmap_obj and close get and put
258 * a reference on obj. So, we dont need to hold one here.
260 err = msm_gem_lock_interruptible(obj);
262 ret = VM_FAULT_NOPAGE;
266 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
268 return VM_FAULT_SIGBUS;
271 /* make sure we have pages attached now */
272 pages = get_pages(obj);
274 ret = vmf_error(PTR_ERR(pages));
278 /* We don't use vmf->pgoff since that has the fake offset: */
279 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
281 pfn = page_to_pfn(pages[pgoff]);
283 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
284 pfn, pfn << PAGE_SHIFT);
286 ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
293 /** get mmap offset */
294 static uint64_t mmap_offset(struct drm_gem_object *obj)
296 struct drm_device *dev = obj->dev;
299 GEM_WARN_ON(!msm_gem_is_locked(obj));
301 /* Make it mmapable */
302 ret = drm_gem_create_mmap_offset(obj);
305 DRM_DEV_ERROR(dev->dev, "could not allocate mmap offset\n");
309 return drm_vma_node_offset_addr(&obj->vma_node);
312 uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
317 offset = mmap_offset(obj);
322 static struct msm_gem_vma *add_vma(struct drm_gem_object *obj,
323 struct msm_gem_address_space *aspace)
325 struct msm_gem_object *msm_obj = to_msm_bo(obj);
326 struct msm_gem_vma *vma;
328 GEM_WARN_ON(!msm_gem_is_locked(obj));
330 vma = kzalloc(sizeof(*vma), GFP_KERNEL);
332 return ERR_PTR(-ENOMEM);
334 vma->aspace = aspace;
336 list_add_tail(&vma->list, &msm_obj->vmas);
341 static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj,
342 struct msm_gem_address_space *aspace)
344 struct msm_gem_object *msm_obj = to_msm_bo(obj);
345 struct msm_gem_vma *vma;
347 GEM_WARN_ON(!msm_gem_is_locked(obj));
349 list_for_each_entry(vma, &msm_obj->vmas, list) {
350 if (vma->aspace == aspace)
357 static void del_vma(struct msm_gem_vma *vma)
362 list_del(&vma->list);
367 * If close is true, this also closes the VMA (releasing the allocated
368 * iova range) in addition to removing the iommu mapping. In the eviction
369 * case (!close), we keep the iova allocated, but only remove the iommu
373 put_iova_spaces(struct drm_gem_object *obj, bool close)
375 struct msm_gem_object *msm_obj = to_msm_bo(obj);
376 struct msm_gem_vma *vma;
378 GEM_WARN_ON(!msm_gem_is_locked(obj));
380 list_for_each_entry(vma, &msm_obj->vmas, list) {
382 msm_gem_purge_vma(vma->aspace, vma);
384 msm_gem_close_vma(vma->aspace, vma);
389 /* Called with msm_obj locked */
391 put_iova_vmas(struct drm_gem_object *obj)
393 struct msm_gem_object *msm_obj = to_msm_bo(obj);
394 struct msm_gem_vma *vma, *tmp;
396 GEM_WARN_ON(!msm_gem_is_locked(obj));
398 list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) {
403 static int get_iova_locked(struct drm_gem_object *obj,
404 struct msm_gem_address_space *aspace, uint64_t *iova,
405 u64 range_start, u64 range_end)
407 struct msm_gem_vma *vma;
410 GEM_WARN_ON(!msm_gem_is_locked(obj));
412 vma = lookup_vma(obj, aspace);
415 vma = add_vma(obj, aspace);
419 ret = msm_gem_init_vma(aspace, vma, obj->size >> PAGE_SHIFT,
420 range_start, range_end);
431 static int msm_gem_pin_iova(struct drm_gem_object *obj,
432 struct msm_gem_address_space *aspace)
434 struct msm_gem_object *msm_obj = to_msm_bo(obj);
435 struct msm_gem_vma *vma;
437 int ret, prot = IOMMU_READ;
439 if (!(msm_obj->flags & MSM_BO_GPU_READONLY))
442 if (msm_obj->flags & MSM_BO_MAP_PRIV)
445 if (msm_obj->flags & MSM_BO_CACHED_COHERENT)
448 GEM_WARN_ON(!msm_gem_is_locked(obj));
450 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED))
453 vma = lookup_vma(obj, aspace);
454 if (GEM_WARN_ON(!vma))
457 pages = get_pages(obj);
459 return PTR_ERR(pages);
461 ret = msm_gem_map_vma(aspace, vma, prot,
462 msm_obj->sgt, obj->size >> PAGE_SHIFT);
465 msm_obj->pin_count++;
470 static int get_and_pin_iova_range_locked(struct drm_gem_object *obj,
471 struct msm_gem_address_space *aspace, uint64_t *iova,
472 u64 range_start, u64 range_end)
477 GEM_WARN_ON(!msm_gem_is_locked(obj));
479 ret = get_iova_locked(obj, aspace, &local,
480 range_start, range_end);
483 ret = msm_gem_pin_iova(obj, aspace);
492 * get iova and pin it. Should have a matching put
493 * limits iova to specified range (in pages)
495 int msm_gem_get_and_pin_iova_range(struct drm_gem_object *obj,
496 struct msm_gem_address_space *aspace, uint64_t *iova,
497 u64 range_start, u64 range_end)
502 ret = get_and_pin_iova_range_locked(obj, aspace, iova, range_start, range_end);
508 int msm_gem_get_and_pin_iova_locked(struct drm_gem_object *obj,
509 struct msm_gem_address_space *aspace, uint64_t *iova)
511 return get_and_pin_iova_range_locked(obj, aspace, iova, 0, U64_MAX);
514 /* get iova and pin it. Should have a matching put */
515 int msm_gem_get_and_pin_iova(struct drm_gem_object *obj,
516 struct msm_gem_address_space *aspace, uint64_t *iova)
518 return msm_gem_get_and_pin_iova_range(obj, aspace, iova, 0, U64_MAX);
522 * Get an iova but don't pin it. Doesn't need a put because iovas are currently
523 * valid for the life of the object
525 int msm_gem_get_iova(struct drm_gem_object *obj,
526 struct msm_gem_address_space *aspace, uint64_t *iova)
531 ret = get_iova_locked(obj, aspace, iova, 0, U64_MAX);
537 /* get iova without taking a reference, used in places where you have
538 * already done a 'msm_gem_get_and_pin_iova' or 'msm_gem_get_iova'
540 uint64_t msm_gem_iova(struct drm_gem_object *obj,
541 struct msm_gem_address_space *aspace)
543 struct msm_gem_vma *vma;
546 vma = lookup_vma(obj, aspace);
550 return vma ? vma->iova : 0;
554 * Locked variant of msm_gem_unpin_iova()
556 void msm_gem_unpin_iova_locked(struct drm_gem_object *obj,
557 struct msm_gem_address_space *aspace)
559 struct msm_gem_object *msm_obj = to_msm_bo(obj);
560 struct msm_gem_vma *vma;
562 GEM_WARN_ON(!msm_gem_is_locked(obj));
564 vma = lookup_vma(obj, aspace);
566 if (!GEM_WARN_ON(!vma)) {
567 msm_gem_unmap_vma(aspace, vma);
569 msm_obj->pin_count--;
570 GEM_WARN_ON(msm_obj->pin_count < 0);
572 update_inactive(msm_obj);
577 * Unpin a iova by updating the reference counts. The memory isn't actually
578 * purged until something else (shrinker, mm_notifier, destroy, etc) decides
581 void msm_gem_unpin_iova(struct drm_gem_object *obj,
582 struct msm_gem_address_space *aspace)
585 msm_gem_unpin_iova_locked(obj, aspace);
589 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
590 struct drm_mode_create_dumb *args)
592 args->pitch = align_pitch(args->width, args->bpp);
593 args->size = PAGE_ALIGN(args->pitch * args->height);
594 return msm_gem_new_handle(dev, file, args->size,
595 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle, "dumb");
598 int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
599 uint32_t handle, uint64_t *offset)
601 struct drm_gem_object *obj;
604 /* GEM does all our handle to object mapping */
605 obj = drm_gem_object_lookup(file, handle);
611 *offset = msm_gem_mmap_offset(obj);
613 drm_gem_object_put(obj);
619 static void *get_vaddr(struct drm_gem_object *obj, unsigned madv)
621 struct msm_gem_object *msm_obj = to_msm_bo(obj);
624 GEM_WARN_ON(!msm_gem_is_locked(obj));
626 if (obj->import_attach)
627 return ERR_PTR(-ENODEV);
629 if (GEM_WARN_ON(msm_obj->madv > madv)) {
630 DRM_DEV_ERROR(obj->dev->dev, "Invalid madv state: %u vs %u\n",
631 msm_obj->madv, madv);
632 return ERR_PTR(-EBUSY);
635 /* increment vmap_count *before* vmap() call, so shrinker can
636 * check vmap_count (is_vunmapable()) outside of msm_obj lock.
637 * This guarantees that we won't try to msm_gem_vunmap() this
638 * same object from within the vmap() call (while we already
641 msm_obj->vmap_count++;
643 if (!msm_obj->vaddr) {
644 struct page **pages = get_pages(obj);
646 ret = PTR_ERR(pages);
649 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
650 VM_MAP, msm_gem_pgprot(msm_obj, PAGE_KERNEL));
651 if (msm_obj->vaddr == NULL) {
656 update_inactive(msm_obj);
659 return msm_obj->vaddr;
662 msm_obj->vmap_count--;
666 void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj)
668 return get_vaddr(obj, MSM_MADV_WILLNEED);
671 void *msm_gem_get_vaddr(struct drm_gem_object *obj)
676 ret = msm_gem_get_vaddr_locked(obj);
683 * Don't use this! It is for the very special case of dumping
684 * submits from GPU hangs or faults, were the bo may already
685 * be MSM_MADV_DONTNEED, but we know the buffer is still on the
688 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj)
690 return get_vaddr(obj, __MSM_MADV_PURGED);
693 void msm_gem_put_vaddr_locked(struct drm_gem_object *obj)
695 struct msm_gem_object *msm_obj = to_msm_bo(obj);
697 GEM_WARN_ON(!msm_gem_is_locked(obj));
698 GEM_WARN_ON(msm_obj->vmap_count < 1);
700 msm_obj->vmap_count--;
703 void msm_gem_put_vaddr(struct drm_gem_object *obj)
706 msm_gem_put_vaddr_locked(obj);
710 /* Update madvise status, returns true if not purged, else
713 int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv)
715 struct msm_gem_object *msm_obj = to_msm_bo(obj);
719 if (msm_obj->madv != __MSM_MADV_PURGED)
720 msm_obj->madv = madv;
722 madv = msm_obj->madv;
724 /* If the obj is inactive, we might need to move it
725 * between inactive lists
727 if (msm_obj->active_count == 0)
728 update_inactive(msm_obj);
732 return (madv != __MSM_MADV_PURGED);
735 void msm_gem_purge(struct drm_gem_object *obj)
737 struct drm_device *dev = obj->dev;
738 struct msm_gem_object *msm_obj = to_msm_bo(obj);
740 GEM_WARN_ON(!msm_gem_is_locked(obj));
741 GEM_WARN_ON(!is_purgeable(msm_obj));
743 /* Get rid of any iommu mapping(s): */
744 put_iova_spaces(obj, true);
748 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
754 msm_obj->madv = __MSM_MADV_PURGED;
755 update_inactive(msm_obj);
757 drm_gem_free_mmap_offset(obj);
759 /* Our goal here is to return as much of the memory as
760 * is possible back to the system as we are called from OOM.
761 * To do this we must instruct the shmfs to drop all of its
762 * backing pages, *now*.
764 shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1);
766 invalidate_mapping_pages(file_inode(obj->filp)->i_mapping,
771 * Unpin the backing pages and make them available to be swapped out.
773 void msm_gem_evict(struct drm_gem_object *obj)
775 struct drm_device *dev = obj->dev;
776 struct msm_gem_object *msm_obj = to_msm_bo(obj);
778 GEM_WARN_ON(!msm_gem_is_locked(obj));
779 GEM_WARN_ON(is_unevictable(msm_obj));
780 GEM_WARN_ON(!msm_obj->evictable);
781 GEM_WARN_ON(msm_obj->active_count);
783 /* Get rid of any iommu mapping(s): */
784 put_iova_spaces(obj, false);
786 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
790 update_inactive(msm_obj);
793 void msm_gem_vunmap(struct drm_gem_object *obj)
795 struct msm_gem_object *msm_obj = to_msm_bo(obj);
797 GEM_WARN_ON(!msm_gem_is_locked(obj));
799 if (!msm_obj->vaddr || GEM_WARN_ON(!is_vunmapable(msm_obj)))
802 vunmap(msm_obj->vaddr);
803 msm_obj->vaddr = NULL;
806 void msm_gem_active_get(struct drm_gem_object *obj, struct msm_gpu *gpu)
808 struct msm_gem_object *msm_obj = to_msm_bo(obj);
809 struct msm_drm_private *priv = obj->dev->dev_private;
812 GEM_WARN_ON(!msm_gem_is_locked(obj));
813 GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED);
814 GEM_WARN_ON(msm_obj->dontneed);
816 if (msm_obj->active_count++ == 0) {
817 mutex_lock(&priv->mm_lock);
818 if (msm_obj->evictable)
819 mark_unevictable(msm_obj);
820 list_del(&msm_obj->mm_list);
821 list_add_tail(&msm_obj->mm_list, &gpu->active_list);
822 mutex_unlock(&priv->mm_lock);
826 void msm_gem_active_put(struct drm_gem_object *obj)
828 struct msm_gem_object *msm_obj = to_msm_bo(obj);
831 GEM_WARN_ON(!msm_gem_is_locked(obj));
833 if (--msm_obj->active_count == 0) {
834 update_inactive(msm_obj);
838 static void update_inactive(struct msm_gem_object *msm_obj)
840 struct msm_drm_private *priv = msm_obj->base.dev->dev_private;
842 GEM_WARN_ON(!msm_gem_is_locked(&msm_obj->base));
844 if (msm_obj->active_count != 0)
847 mutex_lock(&priv->mm_lock);
849 if (msm_obj->dontneed)
850 mark_unpurgeable(msm_obj);
851 if (msm_obj->evictable)
852 mark_unevictable(msm_obj);
854 list_del(&msm_obj->mm_list);
855 if ((msm_obj->madv == MSM_MADV_WILLNEED) && msm_obj->sgt) {
856 list_add_tail(&msm_obj->mm_list, &priv->inactive_willneed);
857 mark_evictable(msm_obj);
858 } else if (msm_obj->madv == MSM_MADV_DONTNEED) {
859 list_add_tail(&msm_obj->mm_list, &priv->inactive_dontneed);
860 mark_purgeable(msm_obj);
862 GEM_WARN_ON((msm_obj->madv != __MSM_MADV_PURGED) && msm_obj->sgt);
863 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned);
866 mutex_unlock(&priv->mm_lock);
869 int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout)
871 bool write = !!(op & MSM_PREP_WRITE);
872 unsigned long remain =
873 op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout);
876 ret = dma_resv_wait_timeout(obj->resv, write, true, remain);
878 return remain == 0 ? -EBUSY : -ETIMEDOUT;
882 /* TODO cache maintenance */
887 int msm_gem_cpu_fini(struct drm_gem_object *obj)
889 /* TODO cache maintenance */
893 #ifdef CONFIG_DEBUG_FS
894 static void describe_fence(struct dma_fence *fence, const char *type,
897 if (!dma_fence_is_signaled(fence))
898 seq_printf(m, "\t%9s: %s %s seq %llu\n", type,
899 fence->ops->get_driver_name(fence),
900 fence->ops->get_timeline_name(fence),
904 void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m,
905 struct msm_gem_stats *stats)
907 struct msm_gem_object *msm_obj = to_msm_bo(obj);
908 struct dma_resv *robj = obj->resv;
909 struct dma_resv_list *fobj;
910 struct dma_fence *fence;
911 struct msm_gem_vma *vma;
912 uint64_t off = drm_vma_node_start(&obj->vma_node);
918 stats->all.size += obj->size;
920 if (is_active(msm_obj)) {
921 stats->active.count++;
922 stats->active.size += obj->size;
925 if (msm_obj->pages) {
926 stats->resident.count++;
927 stats->resident.size += obj->size;
930 switch (msm_obj->madv) {
931 case __MSM_MADV_PURGED:
932 stats->purged.count++;
933 stats->purged.size += obj->size;
936 case MSM_MADV_DONTNEED:
937 stats->purgeable.count++;
938 stats->purgeable.size += obj->size;
941 case MSM_MADV_WILLNEED:
947 seq_printf(m, "%08x: %c %2d (%2d) %08llx %p",
948 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I',
949 obj->name, kref_read(&obj->refcount),
950 off, msm_obj->vaddr);
952 seq_printf(m, " %08zu %9s %-32s\n", obj->size, madv, msm_obj->name);
954 if (!list_empty(&msm_obj->vmas)) {
956 seq_puts(m, " vmas:");
958 list_for_each_entry(vma, &msm_obj->vmas, list) {
959 const char *name, *comm;
961 struct msm_gem_address_space *aspace = vma->aspace;
962 struct task_struct *task =
963 get_pid_task(aspace->pid, PIDTYPE_PID);
965 comm = kstrdup(task->comm, GFP_KERNEL);
973 seq_printf(m, " [%s%s%s: aspace=%p, %08llx,%s,inuse=%d]",
974 name, comm ? ":" : "", comm ? comm : "",
975 vma->aspace, vma->iova,
976 vma->mapped ? "mapped" : "unmapped",
985 fobj = dma_resv_shared_list(robj);
987 unsigned int i, shared_count = fobj->shared_count;
989 for (i = 0; i < shared_count; i++) {
990 fence = rcu_dereference(fobj->shared[i]);
991 describe_fence(fence, "Shared", m);
995 fence = dma_resv_excl_fence(robj);
997 describe_fence(fence, "Exclusive", m);
1000 msm_gem_unlock(obj);
1003 void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
1005 struct msm_gem_stats stats = {};
1006 struct msm_gem_object *msm_obj;
1008 seq_puts(m, " flags id ref offset kaddr size madv name\n");
1009 list_for_each_entry(msm_obj, list, node) {
1010 struct drm_gem_object *obj = &msm_obj->base;
1012 msm_gem_describe(obj, m, &stats);
1015 seq_printf(m, "Total: %4d objects, %9zu bytes\n",
1016 stats.all.count, stats.all.size);
1017 seq_printf(m, "Active: %4d objects, %9zu bytes\n",
1018 stats.active.count, stats.active.size);
1019 seq_printf(m, "Resident: %4d objects, %9zu bytes\n",
1020 stats.resident.count, stats.resident.size);
1021 seq_printf(m, "Purgeable: %4d objects, %9zu bytes\n",
1022 stats.purgeable.count, stats.purgeable.size);
1023 seq_printf(m, "Purged: %4d objects, %9zu bytes\n",
1024 stats.purged.count, stats.purged.size);
1028 /* don't call directly! Use drm_gem_object_put() */
1029 void msm_gem_free_object(struct drm_gem_object *obj)
1031 struct msm_gem_object *msm_obj = to_msm_bo(obj);
1032 struct drm_device *dev = obj->dev;
1033 struct msm_drm_private *priv = dev->dev_private;
1035 mutex_lock(&priv->obj_lock);
1036 list_del(&msm_obj->node);
1037 mutex_unlock(&priv->obj_lock);
1039 mutex_lock(&priv->mm_lock);
1040 if (msm_obj->dontneed)
1041 mark_unpurgeable(msm_obj);
1042 list_del(&msm_obj->mm_list);
1043 mutex_unlock(&priv->mm_lock);
1047 /* object should not be on active list: */
1048 GEM_WARN_ON(is_active(msm_obj));
1050 put_iova_spaces(obj, true);
1052 if (obj->import_attach) {
1053 GEM_WARN_ON(msm_obj->vaddr);
1055 /* Don't drop the pages for imported dmabuf, as they are not
1056 * ours, just free the array we allocated:
1058 kvfree(msm_obj->pages);
1062 /* dma_buf_detach() grabs resv lock, so we need to unlock
1063 * prior to drm_prime_gem_destroy
1065 msm_gem_unlock(obj);
1067 drm_prime_gem_destroy(obj, msm_obj->sgt);
1069 msm_gem_vunmap(obj);
1072 msm_gem_unlock(obj);
1075 drm_gem_object_release(obj);
1080 /* convenience method to construct a GEM buffer object, and userspace handle */
1081 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
1082 uint32_t size, uint32_t flags, uint32_t *handle,
1085 struct drm_gem_object *obj;
1088 obj = msm_gem_new(dev, size, flags);
1091 return PTR_ERR(obj);
1094 msm_gem_object_set_name(obj, "%s", name);
1096 ret = drm_gem_handle_create(file, obj, handle);
1098 /* drop reference from allocate - handle holds it now */
1099 drm_gem_object_put(obj);
1104 static const struct vm_operations_struct vm_ops = {
1105 .fault = msm_gem_fault,
1106 .open = drm_gem_vm_open,
1107 .close = drm_gem_vm_close,
1110 static const struct drm_gem_object_funcs msm_gem_object_funcs = {
1111 .free = msm_gem_free_object,
1112 .pin = msm_gem_prime_pin,
1113 .unpin = msm_gem_prime_unpin,
1114 .get_sg_table = msm_gem_prime_get_sg_table,
1115 .vmap = msm_gem_prime_vmap,
1116 .vunmap = msm_gem_prime_vunmap,
1120 static int msm_gem_new_impl(struct drm_device *dev,
1121 uint32_t size, uint32_t flags,
1122 struct drm_gem_object **obj)
1124 struct msm_drm_private *priv = dev->dev_private;
1125 struct msm_gem_object *msm_obj;
1127 switch (flags & MSM_BO_CACHE_MASK) {
1128 case MSM_BO_UNCACHED:
1132 case MSM_BO_CACHED_COHERENT:
1133 if (priv->has_cached_coherent)
1137 DRM_DEV_ERROR(dev->dev, "invalid cache flag: %x\n",
1138 (flags & MSM_BO_CACHE_MASK));
1142 msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL);
1146 msm_obj->flags = flags;
1147 msm_obj->madv = MSM_MADV_WILLNEED;
1149 INIT_LIST_HEAD(&msm_obj->vmas);
1151 *obj = &msm_obj->base;
1152 (*obj)->funcs = &msm_gem_object_funcs;
1157 struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32_t flags)
1159 struct msm_drm_private *priv = dev->dev_private;
1160 struct msm_gem_object *msm_obj;
1161 struct drm_gem_object *obj = NULL;
1162 bool use_vram = false;
1165 size = PAGE_ALIGN(size);
1167 if (!msm_use_mmu(dev))
1169 else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && priv->vram.size)
1172 if (GEM_WARN_ON(use_vram && !priv->vram.size))
1173 return ERR_PTR(-EINVAL);
1175 /* Disallow zero sized objects as they make the underlying
1176 * infrastructure grumpy
1179 return ERR_PTR(-EINVAL);
1181 ret = msm_gem_new_impl(dev, size, flags, &obj);
1185 msm_obj = to_msm_bo(obj);
1188 struct msm_gem_vma *vma;
1189 struct page **pages;
1191 drm_gem_private_object_init(dev, obj, size);
1195 vma = add_vma(obj, NULL);
1196 msm_gem_unlock(obj);
1202 to_msm_bo(obj)->vram_node = &vma->node;
1204 /* Call chain get_pages() -> update_inactive() tries to
1205 * access msm_obj->mm_list, but it is not initialized yet.
1206 * To avoid NULL pointer dereference error, initialize
1207 * mm_list to be empty.
1209 INIT_LIST_HEAD(&msm_obj->mm_list);
1212 pages = get_pages(obj);
1213 msm_gem_unlock(obj);
1214 if (IS_ERR(pages)) {
1215 ret = PTR_ERR(pages);
1219 vma->iova = physaddr(obj);
1221 ret = drm_gem_object_init(dev, obj, size);
1225 * Our buffers are kept pinned, so allocating them from the
1226 * MOVABLE zone is a really bad idea, and conflicts with CMA.
1227 * See comments above new_inode() why this is required _and_
1228 * expected if you're going to pin these pages.
1230 mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER);
1233 mutex_lock(&priv->mm_lock);
1234 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned);
1235 mutex_unlock(&priv->mm_lock);
1237 mutex_lock(&priv->obj_lock);
1238 list_add_tail(&msm_obj->node, &priv->objects);
1239 mutex_unlock(&priv->obj_lock);
1244 drm_gem_object_put(obj);
1245 return ERR_PTR(ret);
1248 struct drm_gem_object *msm_gem_import(struct drm_device *dev,
1249 struct dma_buf *dmabuf, struct sg_table *sgt)
1251 struct msm_drm_private *priv = dev->dev_private;
1252 struct msm_gem_object *msm_obj;
1253 struct drm_gem_object *obj;
1257 /* if we don't have IOMMU, don't bother pretending we can import: */
1258 if (!msm_use_mmu(dev)) {
1259 DRM_DEV_ERROR(dev->dev, "cannot import without IOMMU\n");
1260 return ERR_PTR(-EINVAL);
1263 size = PAGE_ALIGN(dmabuf->size);
1265 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj);
1269 drm_gem_private_object_init(dev, obj, size);
1271 npages = size / PAGE_SIZE;
1273 msm_obj = to_msm_bo(obj);
1276 msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
1277 if (!msm_obj->pages) {
1278 msm_gem_unlock(obj);
1283 ret = drm_prime_sg_to_page_array(sgt, msm_obj->pages, npages);
1285 msm_gem_unlock(obj);
1289 msm_gem_unlock(obj);
1291 mutex_lock(&priv->mm_lock);
1292 list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned);
1293 mutex_unlock(&priv->mm_lock);
1295 mutex_lock(&priv->obj_lock);
1296 list_add_tail(&msm_obj->node, &priv->objects);
1297 mutex_unlock(&priv->obj_lock);
1302 drm_gem_object_put(obj);
1303 return ERR_PTR(ret);
1306 void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
1307 uint32_t flags, struct msm_gem_address_space *aspace,
1308 struct drm_gem_object **bo, uint64_t *iova)
1311 struct drm_gem_object *obj = msm_gem_new(dev, size, flags);
1315 return ERR_CAST(obj);
1318 ret = msm_gem_get_and_pin_iova(obj, aspace, iova);
1323 vaddr = msm_gem_get_vaddr(obj);
1324 if (IS_ERR(vaddr)) {
1325 msm_gem_unpin_iova(obj, aspace);
1326 ret = PTR_ERR(vaddr);
1335 drm_gem_object_put(obj);
1337 return ERR_PTR(ret);
1341 void msm_gem_kernel_put(struct drm_gem_object *bo,
1342 struct msm_gem_address_space *aspace)
1344 if (IS_ERR_OR_NULL(bo))
1347 msm_gem_put_vaddr(bo);
1348 msm_gem_unpin_iova(bo, aspace);
1349 drm_gem_object_put(bo);
1352 void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...)
1354 struct msm_gem_object *msm_obj = to_msm_bo(bo);
1361 vsnprintf(msm_obj->name, sizeof(msm_obj->name), fmt, ap);