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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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