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path: root/drivers/gpu/drm/exynos/exynos_drm_gem.h
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Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_gem.h')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_gem.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
index 83d21ef1d1e9..4248d7fb698f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -35,22 +35,29 @@
* exynos drm gem buffer structure.
*
* @kvaddr: kernel virtual address to allocated memory region.
+ * *userptr: user space address.
* @dma_addr: bus address(accessed by dma) to allocated memory region.
* - this address could be physical address without IOMMU and
* device address with IOMMU.
+ * @write: whether pages will be written to by the caller.
* @sgt: sg table to transfer page data.
* @pages: contain all pages to allocated memory region.
* @page_size: could be 4K, 64K or 1MB.
* @size: size of allocated memory region.
+ * @pfnmap: indicate whether memory region from userptr is mmaped with
+ * VM_PFNMAP or not.
*/
struct exynos_drm_gem_buf {
void __iomem *kvaddr;
+ unsigned long userptr;
dma_addr_t dma_addr;
struct dma_attrs dma_attrs;
+ unsigned int write;
struct sg_table *sgt;
struct page **pages;
unsigned long page_size;
unsigned long size;
+ bool pfnmap;
};
/*
@@ -66,6 +73,7 @@ struct exynos_drm_gem_buf {
* or at framebuffer creation.
* @size: size requested from user, in bytes and this size is aligned
* in page unit.
+ * @vma: a pointer to vm_area.
* @flags: indicate memory type to allocated buffer and cache attruibute.
*
* P.S. this object would be transfered to user as kms_bo.handle so
@@ -75,6 +83,7 @@ struct exynos_drm_gem_obj {
struct drm_gem_object base;
struct exynos_drm_gem_buf *buffer;
unsigned long size;
+ struct vm_area_struct *vma;
unsigned int flags;
};
@@ -129,6 +138,10 @@ int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
+/* map user space allocated by malloc to pages. */
+int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv);
+
/* get buffer information to memory region allocated by gem. */
int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
@@ -164,4 +177,36 @@ int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
/* set vm_flags and we can change the vm attribute to other one at here. */
int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
+static inline int vma_is_io(struct vm_area_struct *vma)
+{
+ return !!(vma->vm_flags & (VM_IO | VM_PFNMAP));
+}
+
+/* get a copy of a virtual memory region. */
+struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma);
+
+/* release a userspace virtual memory area. */
+void exynos_gem_put_vma(struct vm_area_struct *vma);
+
+/* get pages from user space. */
+int exynos_gem_get_pages_from_userptr(unsigned long start,
+ unsigned int npages,
+ struct page **pages,
+ struct vm_area_struct *vma);
+
+/* drop the reference to pages. */
+void exynos_gem_put_pages_to_userptr(struct page **pages,
+ unsigned int npages,
+ struct vm_area_struct *vma);
+
+/* map sgt with dma region. */
+int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev,
+ struct sg_table *sgt,
+ enum dma_data_direction dir);
+
+/* unmap sgt from dma region. */
+void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev,
+ struct sg_table *sgt,
+ enum dma_data_direction dir);
+
#endif