Edit File: drm_gem_cma_helper.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __DRM_GEM_CMA_HELPER_H__ #define __DRM_GEM_CMA_HELPER_H__ #include <drm/drmP.h> #include <drm/drm_gem.h> /** * 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_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size); /** * DRM_GEM_CMA_VMAP_DRIVER_OPS - 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. */ #define DRM_GEM_CMA_VMAP_DRIVER_OPS \ .gem_create_object = drm_cma_gem_create_object_default_funcs, \ .dumb_create = drm_gem_cma_dumb_create, \ .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 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__ */