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This function is similar to drm_gem_cma_dumb_create() but targetted at kernel internal users so that they can override the pitch and size requirements of the dumb buffer. It is important to make this difference because the IOCTL says that the pitch and size fields are to be considered outputs and therefore should not be used in computations of the framebuffer size. Internal users may still want to use this code to avoid duplication and at the same time pass on additional, driver-specific restrictions on the pitch and size. While at it, convert the R-Car DU driver, the single user that overrides the pitch, to use the new internal helper. Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Thierry Reding <treding@nvidia.com>
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
#ifndef __DRM_GEM_CMA_HELPER_H__
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#define __DRM_GEM_CMA_HELPER_H__
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#include <drm/drmP.h>
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#include <drm/drm_gem.h>
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/**
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* struct drm_gem_cma_object - GEM object backed by CMA memory allocations
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* @base: base GEM object
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* @paddr: physical address of the backing memory
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* @sgt: scatter/gather table for imported PRIME buffers
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* @vaddr: kernel virtual address of the backing memory
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*/
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struct drm_gem_cma_object {
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struct drm_gem_object base;
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dma_addr_t paddr;
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struct sg_table *sgt;
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/* For objects with DMA memory allocated by GEM CMA */
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void *vaddr;
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};
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static inline struct drm_gem_cma_object *
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to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
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{
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return container_of(gem_obj, struct drm_gem_cma_object, base);
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}
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/* free GEM object */
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void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
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/* create memory region for DRM framebuffer */
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int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv,
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struct drm_device *drm,
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struct drm_mode_create_dumb *args);
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/* create memory region for DRM framebuffer */
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int drm_gem_cma_dumb_create(struct drm_file *file_priv,
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struct drm_device *drm,
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struct drm_mode_create_dumb *args);
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/* map memory region for DRM framebuffer to user space */
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int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
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struct drm_device *drm, u32 handle,
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u64 *offset);
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/* set vm_flags and we can change the VM attribute to other one at here */
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int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
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/* allocate physical memory */
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struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
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size_t size);
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extern const struct vm_operations_struct drm_gem_cma_vm_ops;
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#ifdef CONFIG_DEBUG_FS
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void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
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#endif
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struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
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struct drm_gem_object *
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drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt);
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int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
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struct vm_area_struct *vma);
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void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
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void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
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#endif /* __DRM_GEM_CMA_HELPER_H__ */
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