![Inki Dae](/assets/img/avatar_default.png)
Changelog v3: just code cleanup. Changelog v2: fix argument to dma_mmap_attr function. - use pages instead of kvaddr because kvaddr is 0 with DMA_ATTR_NO_KERNEL_MAPPING. Changelog v1: When gem allocation is requested, kernel space mapping isn't needed. But if need, such as console framebuffer, the physical pages would be mapped with kernel space though vmap function. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
211 lines
7.2 KiB
C
211 lines
7.2 KiB
C
/* exynos_drm_gem.h
|
|
*
|
|
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
|
|
* Authoer: Inki Dae <inki.dae@samsung.com>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef _EXYNOS_DRM_GEM_H_
|
|
#define _EXYNOS_DRM_GEM_H_
|
|
|
|
#define to_exynos_gem_obj(x) container_of(x,\
|
|
struct exynos_drm_gem_obj, base)
|
|
|
|
#define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG)
|
|
|
|
/*
|
|
* 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.
|
|
* @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 page **pages;
|
|
struct sg_table *sgt;
|
|
unsigned long size;
|
|
bool pfnmap;
|
|
};
|
|
|
|
/*
|
|
* exynos drm buffer structure.
|
|
*
|
|
* @base: a gem object.
|
|
* - a new handle to this gem object would be created
|
|
* by drm_gem_handle_create().
|
|
* @buffer: a pointer to exynos_drm_gem_buffer object.
|
|
* - contain the information to memory region allocated
|
|
* by user request or at framebuffer creation.
|
|
* continuous memory region allocated by user request
|
|
* 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
|
|
* user can access the buffer through kms_bo.handle.
|
|
*/
|
|
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;
|
|
};
|
|
|
|
struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
|
|
|
|
/* destroy a buffer with gem object */
|
|
void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
|
|
|
|
/* create a private gem object and initialize it. */
|
|
struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
|
|
unsigned long size);
|
|
|
|
/* create a new buffer with gem object */
|
|
struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
|
|
unsigned int flags,
|
|
unsigned long size);
|
|
|
|
/*
|
|
* request gem object creation and buffer allocation as the size
|
|
* that it is calculated with framebuffer information such as width,
|
|
* height and bpp.
|
|
*/
|
|
int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv);
|
|
|
|
/*
|
|
* get dma address from gem handle and this function could be used for
|
|
* other drivers such as 2d/3d acceleration drivers.
|
|
* with this function call, gem object reference count would be increased.
|
|
*/
|
|
dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
|
|
unsigned int gem_handle,
|
|
struct drm_file *filp);
|
|
|
|
/*
|
|
* put dma address from gem handle and this function could be used for
|
|
* other drivers such as 2d/3d acceleration drivers.
|
|
* with this function call, gem object reference count would be decreased.
|
|
*/
|
|
void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
|
|
unsigned int gem_handle,
|
|
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,
|
|
struct drm_file *file_priv);
|
|
|
|
/*
|
|
* mmap the physically continuous memory that a gem object contains
|
|
* to user space.
|
|
*/
|
|
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);
|
|
|
|
/* initialize gem object. */
|
|
int exynos_drm_gem_init_object(struct drm_gem_object *obj);
|
|
|
|
/* free gem object. */
|
|
void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj);
|
|
|
|
/* create memory region for drm framebuffer. */
|
|
int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
|
|
struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args);
|
|
|
|
/* map memory region for drm framebuffer to user space. */
|
|
int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
|
|
struct drm_device *dev, uint32_t handle,
|
|
uint64_t *offset);
|
|
|
|
/*
|
|
* destroy memory region allocated.
|
|
* - a gem handle and physical memory region pointed by a gem object
|
|
* would be released by drm_gem_handle_delete().
|
|
*/
|
|
int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
|
|
struct drm_device *dev,
|
|
unsigned int handle);
|
|
|
|
/* page fault handler and mmap fault address(virtual) to physical memory. */
|
|
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
|