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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __DRM_GEM_CMA_HELPER_H__
#define __DRM_GEM_CMA_HELPER_H__
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_gem.h>
struct drm_mode_create_dumb;
/**
* struct drm_gem_cma_object - GEM object backed by CMA memory allocations
* @base: base GEM object
* @paddr: physical address of the backing memory
* @sgt: scatter/gather table for imported PRIME buffers. The table can have
* more than one entry but they are guaranteed to have contiguous
* DMA addresses.
* @vaddr: kernel virtual address of the backing memory
*/
struct drm_gem_cma_object {
struct drm_gem_object base;
dma_addr_t paddr;
struct sg_table *sgt;
/* For objects with DMA memory allocated by GEM CMA */
void *vaddr;
};
#define to_drm_gem_cma_obj(gem_obj) \
container_of(gem_obj, struct drm_gem_cma_object, base)
#ifndef CONFIG_MMU
#define DRM_GEM_CMA_UNMAPPED_AREA_FOPS \
.get_unmapped_area = drm_gem_cma_get_unmapped_area,
#else
#define DRM_GEM_CMA_UNMAPPED_AREA_FOPS
#endif
/**
* DEFINE_DRM_GEM_CMA_FOPS() - macro to generate file operations for CMA drivers
* @name: name for the generated structure
*
* This macro autogenerates a suitable &struct file_operations for CMA based
* drivers, which can be assigned to &drm_driver.fops. Note that this structure
* cannot be shared between drivers, because it contains a reference to the
* current module using THIS_MODULE.
*
* Note that the declaration is already marked as static - if you need a
* non-static version of this you're probably doing it wrong and will break the
* THIS_MODULE reference by accident.
*/
#define DEFINE_DRM_GEM_CMA_FOPS(name) \
static const struct file_operations name = {\
.owner = THIS_MODULE,\
.open = drm_open,\
.release = drm_release,\
.unlocked_ioctl = drm_ioctl,\
.compat_ioctl = drm_compat_ioctl,\
.poll = drm_poll,\
.read = drm_read,\
.llseek = noop_llseek,\
.mmap = drm_gem_cma_mmap,\
DRM_GEM_CMA_UNMAPPED_AREA_FOPS \
}
/* free GEM object */
void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
/* create memory region for DRM framebuffer */
int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv,
struct drm_device *drm,
struct drm_mode_create_dumb *args);
/* create memory region for DRM framebuffer */
int drm_gem_cma_dumb_create(struct drm_file *file_priv,
struct drm_device *drm,
struct drm_mode_create_dumb *args);
/* set vm_flags and we can change the VM attribute to other one at here */
int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
/* allocate physical memory */
struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
size_t size);
extern const struct vm_operations_struct drm_gem_cma_vm_ops;
#ifndef CONFIG_MMU
unsigned long drm_gem_cma_get_unmapped_area(struct file *filp,
unsigned long addr,
unsigned long len,
unsigned long pgoff,
unsigned long flags);
#endif
void drm_gem_cma_print_info(struct drm_printer *p, unsigned int indent,
const struct drm_gem_object *obj);
struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
struct drm_gem_object *
drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sgt);
int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
struct vm_area_struct *vma);
void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
struct drm_gem_object *
drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size);
/**
* DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE - CMA GEM driver operations
* @dumb_create_func: callback function for .dumb_create
*
* This macro provides a shortcut for setting the default GEM operations in the
* &drm_driver structure.
*
* This macro is a variant of DRM_GEM_CMA_DRIVER_OPS for drivers that
* override the default implementation of &struct rm_driver.dumb_create. Use
* DRM_GEM_CMA_DRIVER_OPS if possible. Drivers that require a virtual address
* on imported buffers should use
* DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE() instead.
*/
#define DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(dumb_create_func) \
.gem_create_object = drm_gem_cma_create_object_default_funcs, \
.dumb_create = (dumb_create_func), \
.prime_handle_to_fd = drm_gem_prime_handle_to_fd, \
.prime_fd_to_handle = drm_gem_prime_fd_to_handle, \
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, \
.gem_prime_mmap = drm_gem_cma_prime_mmap
/**
* DRM_GEM_CMA_DRIVER_OPS - CMA GEM driver operations
*
* This macro provides a shortcut for setting the default GEM operations in the
* &drm_driver structure.
*
* Drivers that come with their own implementation of
* &struct drm_driver.dumb_create should use
* DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE() instead. Use
* DRM_GEM_CMA_DRIVER_OPS if possible. Drivers that require a virtual address
* on imported buffers should use DRM_GEM_CMA_DRIVER_OPS_VMAP instead.
*/
#define DRM_GEM_CMA_DRIVER_OPS \
DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(drm_gem_cma_dumb_create)
/**
* DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE - CMA GEM driver operations
* ensuring a virtual address
* on the buffer
* @dumb_create_func: callback function for .dumb_create
*
* This macro provides a shortcut for setting the default GEM operations in the
* &drm_driver structure for drivers that need the virtual address also on
* imported buffers.
*
* This macro is a variant of DRM_GEM_CMA_DRIVER_OPS_VMAP for drivers that
* override the default implementation of &struct drm_driver.dumb_create. Use
* DRM_GEM_CMA_DRIVER_OPS_VMAP if possible. Drivers that do not require a
* virtual address on imported buffers should use
* DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE() instead.
*/
#define DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE(dumb_create_func) \
.gem_create_object = drm_gem_cma_create_object_default_funcs, \
.dumb_create = dumb_create_func, \
.prime_handle_to_fd = drm_gem_prime_handle_to_fd, \
.prime_fd_to_handle = drm_gem_prime_fd_to_handle, \
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table_vmap, \
.gem_prime_mmap = drm_gem_prime_mmap
/**
* DRM_GEM_CMA_DRIVER_OPS_VMAP - CMA GEM driver operations ensuring a virtual
* address on the buffer
*
* This macro provides a shortcut for setting the default GEM operations in the
* &drm_driver structure for drivers that need the virtual address also on
* imported buffers.
*
* Drivers that come with their own implementation of
* &struct drm_driver.dumb_create should use
* DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE() instead. Use
* DRM_GEM_CMA_DRIVER_OPS_VMAP if possible. Drivers that do not require a
* virtual address on imported buffers should use DRM_GEM_CMA_DRIVER_OPS
* instead.
*/
#define DRM_GEM_CMA_DRIVER_OPS_VMAP \
DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE(drm_gem_cma_dumb_create)
struct drm_gem_object *
drm_gem_cma_prime_import_sg_table_vmap(struct drm_device *drm,
struct dma_buf_attachment *attach,
struct sg_table *sgt);
#endif /* __DRM_GEM_CMA_HELPER_H__ */
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