280 lines
9.5 KiB
C
280 lines
9.5 KiB
C
/* 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
|
|
* @map_noncoherent: if true, the GEM object is backed by non-coherent 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;
|
|
|
|
bool map_noncoherent;
|
|
};
|
|
|
|
#define to_drm_gem_cma_obj(gem_obj) \
|
|
container_of(gem_obj, struct drm_gem_cma_object, base)
|
|
|
|
struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
|
|
size_t size);
|
|
void drm_gem_cma_free(struct drm_gem_cma_object *cma_obj);
|
|
void drm_gem_cma_print_info(const struct drm_gem_cma_object *cma_obj,
|
|
struct drm_printer *p, unsigned int indent);
|
|
struct sg_table *drm_gem_cma_get_sg_table(struct drm_gem_cma_object *cma_obj);
|
|
int drm_gem_cma_vmap(struct drm_gem_cma_object *cma_obj,
|
|
struct iosys_map *map);
|
|
int drm_gem_cma_mmap(struct drm_gem_cma_object *cma_obj, struct vm_area_struct *vma);
|
|
|
|
extern const struct vm_operations_struct drm_gem_cma_vm_ops;
|
|
|
|
/*
|
|
* GEM object functions
|
|
*/
|
|
|
|
/**
|
|
* drm_gem_cma_object_free - GEM object function for drm_gem_cma_free()
|
|
* @obj: GEM object to free
|
|
*
|
|
* This function wraps drm_gem_cma_free_object(). Drivers that employ the CMA helpers
|
|
* should use it as their &drm_gem_object_funcs.free handler.
|
|
*/
|
|
static inline void drm_gem_cma_object_free(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
|
|
|
|
drm_gem_cma_free(cma_obj);
|
|
}
|
|
|
|
/**
|
|
* drm_gem_cma_object_print_info() - Print &drm_gem_cma_object info for debugfs
|
|
* @p: DRM printer
|
|
* @indent: Tab indentation level
|
|
* @obj: GEM object
|
|
*
|
|
* This function wraps drm_gem_cma_print_info(). Drivers that employ the CMA helpers
|
|
* should use this function as their &drm_gem_object_funcs.print_info handler.
|
|
*/
|
|
static inline void drm_gem_cma_object_print_info(struct drm_printer *p, unsigned int indent,
|
|
const struct drm_gem_object *obj)
|
|
{
|
|
const struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
|
|
|
|
drm_gem_cma_print_info(cma_obj, p, indent);
|
|
}
|
|
|
|
/**
|
|
* drm_gem_cma_object_get_sg_table - GEM object function for drm_gem_cma_get_sg_table()
|
|
* @obj: GEM object
|
|
*
|
|
* This function wraps drm_gem_cma_get_sg_table(). Drivers that employ the CMA helpers should
|
|
* use it as their &drm_gem_object_funcs.get_sg_table handler.
|
|
*
|
|
* Returns:
|
|
* A pointer to the scatter/gather table of pinned pages or NULL on failure.
|
|
*/
|
|
static inline struct sg_table *drm_gem_cma_object_get_sg_table(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
|
|
|
|
return drm_gem_cma_get_sg_table(cma_obj);
|
|
}
|
|
|
|
/*
|
|
* drm_gem_cma_object_vmap - GEM object function for drm_gem_cma_vmap()
|
|
* @obj: GEM object
|
|
* @map: Returns the kernel virtual address of the CMA GEM object's backing store.
|
|
*
|
|
* This function wraps drm_gem_cma_vmap(). Drivers that employ the CMA helpers should
|
|
* use it as their &drm_gem_object_funcs.vmap handler.
|
|
*
|
|
* Returns:
|
|
* 0 on success or a negative error code on failure.
|
|
*/
|
|
static inline int drm_gem_cma_object_vmap(struct drm_gem_object *obj,
|
|
struct iosys_map *map)
|
|
{
|
|
struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
|
|
|
|
return drm_gem_cma_vmap(cma_obj, map);
|
|
}
|
|
|
|
/**
|
|
* drm_gem_cma_object_mmap - GEM object function for drm_gem_cma_mmap()
|
|
* @obj: GEM object
|
|
* @vma: VMA for the area to be mapped
|
|
*
|
|
* This function wraps drm_gem_cma_mmap(). Drivers that employ the cma helpers should
|
|
* use it as their &drm_gem_object_funcs.mmap handler.
|
|
*
|
|
* Returns:
|
|
* 0 on success or a negative error code on failure.
|
|
*/
|
|
static inline int drm_gem_cma_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
|
|
{
|
|
struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
|
|
|
|
return drm_gem_cma_mmap(cma_obj, vma);
|
|
}
|
|
|
|
/*
|
|
* Driver ops
|
|
*/
|
|
|
|
/* 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);
|
|
|
|
struct drm_gem_object *
|
|
drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
|
|
struct dma_buf_attachment *attach,
|
|
struct sg_table *sgt);
|
|
|
|
/**
|
|
* 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) \
|
|
.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_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) \
|
|
.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);
|
|
|
|
/*
|
|
* File 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);
|
|
#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_mmap,\
|
|
DRM_GEM_CMA_UNMAPPED_AREA_FOPS \
|
|
}
|
|
|
|
#endif /* __DRM_GEM_CMA_HELPER_H__ */
|