drm_vm.c File Reference

#include <drm/drmP.h>
#include <linux/export.h>

Go to the source code of this file.

Functions
void	drm_vm_open_locked (struct drm_device *dev, struct vm_area_struct *vma)
void	drm_vm_close_locked (struct drm_device *dev, struct vm_area_struct *vma)
int	drm_mmap_locked (struct file *filp, struct vm_area_struct *vma)
int	drm_mmap (struct file *filp, struct vm_area_struct *vma)
	EXPORT_SYMBOL (drm_mmap)

Detailed Description

Memory mapping for DRM

Author

Rickard E. (Rik) Faith faith.nosp@m.@val.nosp@m.inux..nosp@m.com

Gareth Hughes garet.nosp@m.h@va.nosp@m.linux.nosp@m..com

Definition in file drm_vm.c.

Function Documentation

int drm_mmap	(	struct file *	filp,
		struct vm_area_struct *	vma
	)

Definition at line 660 of file drm_vm.c.

int drm_mmap_locked	(	struct file *	filp,
		struct vm_area_struct *	vma
	)

mmap DMA memory.

Parameters

file_priv	DRM file private.
vma	virtual memory area.

Returns

zero on success or a negative number on failure.

If the virtual memory area has no offset associated with it then it's a DMA area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, checks that the restricted flag is not set, sets the virtual memory operations according to the mapping type and remaps the pages. Finally sets the file pointer and calls vm_open().

Definition at line 545 of file drm_vm.c.

void drm_vm_close_locked	(	struct drm_device *	dev,
		struct vm_area_struct *	vma
	)

Definition at line 436 of file drm_vm.c.

void drm_vm_open_locked	(	struct drm_device *	dev,
		struct vm_area_struct *	vma
	)

open method for shared virtual memory.

Parameters

vma	virtual memory area.

Create a new drm_vma_entry structure as the vma private data entry and add it to drm_device::vmalist.

Definition at line 409 of file drm_vm.c.

EXPORT_SYMBOL

(

drm_mmap

)