diff options
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.c | 49 | ||||
| -rw-r--r-- | include/drm/exynos_drm.h | 11 |
2 files changed, 49 insertions, 11 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index 1dffa8359f88..e8ab3beb4510 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -66,6 +66,22 @@ static int check_gem_flags(unsigned int flags) return 0; } +static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, + struct vm_area_struct *vma) +{ + DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); + + /* non-cachable as default. */ + if (obj->flags & EXYNOS_BO_CACHABLE) + vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); + else if (obj->flags & EXYNOS_BO_WC) + vma->vm_page_prot = + pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); + else + vma->vm_page_prot = + pgprot_noncached(vm_get_page_prot(vma->vm_flags)); +} + static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) { if (!IS_NONCONTIG_BUFFER(flags)) { @@ -262,24 +278,24 @@ static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) { struct drm_gem_object *obj; + struct exynos_drm_gem_buf *buf; DRM_DEBUG_KMS("%s\n", __FILE__); - if (!exynos_gem_obj) - return; - obj = &exynos_gem_obj->base; + buf = exynos_gem_obj->buffer; DRM_DEBUG_KMS("handle count = %d\n", atomic_read(&obj->handle_count)); - if ((exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) && - exynos_gem_obj->buffer->pages) + if (!buf->pages) + return; + + if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) exynos_drm_gem_put_pages(obj); else - exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, - exynos_gem_obj->buffer); + exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); - exynos_drm_fini_buf(obj->dev, exynos_gem_obj->buffer); + exynos_drm_fini_buf(obj->dev, buf); exynos_gem_obj->buffer = NULL; if (obj->map_list.map) @@ -493,8 +509,7 @@ static int exynos_drm_gem_mmap_buffer(struct file *filp, vma->vm_flags |= (VM_IO | VM_RESERVED); - /* in case of direct mapping, always having non-cachable attribute */ - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + update_vm_cache_attr(exynos_gem_obj, vma); vm_size = usize = vma->vm_end - vma->vm_start; @@ -724,6 +739,8 @@ int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) { + struct exynos_drm_gem_obj *exynos_gem_obj; + struct drm_gem_object *obj; int ret; DRM_DEBUG_KMS("%s\n", __FILE__); @@ -735,8 +752,20 @@ int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) return ret; } + obj = vma->vm_private_data; + exynos_gem_obj = to_exynos_gem_obj(obj); + + ret = check_gem_flags(exynos_gem_obj->flags); + if (ret) { + drm_gem_vm_close(vma); + drm_gem_free_mmap_offset(obj); + return ret; + } + vma->vm_flags &= ~VM_PFNMAP; vma->vm_flags |= VM_MIXEDMAP; + update_vm_cache_attr(exynos_gem_obj, vma); + return ret; } diff --git a/include/drm/exynos_drm.h b/include/drm/exynos_drm.h index e478de4e5d56..2d6eb06637bf 100644 --- a/include/drm/exynos_drm.h +++ b/include/drm/exynos_drm.h @@ -95,9 +95,18 @@ struct drm_exynos_plane_set_zpos { /* memory type definitions. */ enum e_drm_exynos_gem_mem_type { + /* Physically Continuous memory and used as default. */ + EXYNOS_BO_CONTIG = 0 << 0, /* Physically Non-Continuous memory. */ EXYNOS_BO_NONCONTIG = 1 << 0, - EXYNOS_BO_MASK = EXYNOS_BO_NONCONTIG + /* non-cachable mapping and used as default. */ + EXYNOS_BO_NONCACHABLE = 0 << 1, + /* cachable mapping. */ + EXYNOS_BO_CACHABLE = 1 << 1, + /* write-combine mapping. */ + EXYNOS_BO_WC = 1 << 2, + EXYNOS_BO_MASK = EXYNOS_BO_NONCONTIG | EXYNOS_BO_CACHABLE | + EXYNOS_BO_WC }; #define DRM_EXYNOS_GEM_CREATE 0x00 |