diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_gem.h')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.h | 58 |
1 files changed, 51 insertions, 7 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h index 085b2a5..f11f2af 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.h +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h @@ -35,21 +35,27 @@ * 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. + * @pages: Array of backing pages. * @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 sg_table *sgt; + struct dma_attrs dma_attrs; + unsigned int write; struct page **pages; - unsigned long page_size; + struct sg_table *sgt; unsigned long size; + bool pfnmap; }; /* @@ -65,6 +71,7 @@ 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 @@ -74,6 +81,7 @@ 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; }; @@ -104,9 +112,9 @@ int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, * other drivers such as 2d/3d acceleration drivers. * with this function call, gem object reference count would be increased. */ -void *exynos_drm_gem_get_dma_addr(struct drm_device *dev, +dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, unsigned int gem_handle, - struct drm_file *file_priv); + struct drm_file *filp); /* * put dma address from gem handle and this function could be used for @@ -115,7 +123,7 @@ void *exynos_drm_gem_get_dma_addr(struct drm_device *dev, */ void exynos_drm_gem_put_dma_addr(struct drm_device *dev, unsigned int gem_handle, - struct drm_file *file_priv); + struct drm_file *filp); /* get buffer offset to map to user space. */ int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, @@ -128,6 +136,10 @@ 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); @@ -163,4 +175,36 @@ 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 |