drm_context.c File Reference

#include <drm/drmP.h>

Go to the source code of this file.

Functions
Context bitmap support
void	drm_ctxbitmap_free (struct drm_device *dev, int ctx_handle)
int	drm_ctxbitmap_init (struct drm_device *dev)
void	drm_ctxbitmap_cleanup (struct drm_device *dev)
Per Context SAREA Support
int	drm_getsareactx (struct drm_device *dev, void *data, struct drm_file *file_priv)
int	drm_setsareactx (struct drm_device *dev, void *data, struct drm_file *file_priv)
The actual DRM context handling routines
int	drm_resctx (struct drm_device *dev, void *data, struct drm_file *file_priv)
int	drm_addctx (struct drm_device *dev, void *data, struct drm_file *file_priv)
int	drm_modctx (struct drm_device *dev, void *data, struct drm_file *file_priv)
int	drm_getctx (struct drm_device *dev, void *data, struct drm_file *file_priv)
int	drm_switchctx (struct drm_device *dev, void *data, struct drm_file *file_priv)
int	drm_newctx (struct drm_device *dev, void *data, struct drm_file *file_priv)
int	drm_rmctx (struct drm_device *dev, void *data, struct drm_file *file_priv)

Detailed Description

IOCTLs for generic contexts

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_context.c.

Function Documentation

int drm_addctx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Add context.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	user argument pointing to a drm_ctx structure.

Returns

zero on success or a negative number on failure.

Get a new handle for the context and copy to userspace.

Definition at line 320 of file drm_context.c.

void drm_ctxbitmap_cleanup

(

struct drm_device *

dev

)

Context bitmap cleanup.

Parameters

dev	DRM device.

Free all idr members using drm_ctx_sarea_free helper function while holding the drm_device::struct_mutex lock.

Definition at line 118 of file drm_context.c.

void drm_ctxbitmap_free	(	struct drm_device *	dev,
		int	ctx_handle
	)

Free a handle from the context bitmap.

Parameters

dev	DRM device.
ctx_handle	context handle.

Clears the bit specified by ctx_handle in drm_device::ctx_bitmap and the entry in drm_device::ctx_idr, while holding the drm_device::struct_mutex lock.

Definition at line 59 of file drm_context.c.

int drm_ctxbitmap_init

(

struct drm_device *

dev

)

Context bitmap initialization.

Parameters

dev	DRM device.

Initialise the drm_device::ctx_idr

Definition at line 104 of file drm_context.c.

int drm_getctx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Get context.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	user argument pointing to a drm_ctx structure.

Returns

zero on success or a negative number on failure.

Definition at line 371 of file drm_context.c.

int drm_getsareactx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Get per-context SAREA.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	user argument pointing to a drm_ctx_priv_map structure.

Returns

zero on success or a negative number on failure.

Gets the map from drm_device::ctx_idr with the handle specified and returns its handle.

Definition at line 143 of file drm_context.c.

int drm_modctx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Definition at line 356 of file drm_context.c.

int drm_newctx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

New context.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	user argument pointing to a drm_ctx structure.

Returns

zero on success or a negative number on failure.

Calls context_switch_complete().

Definition at line 412 of file drm_context.c.

int drm_resctx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Reserve contexts.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	user argument pointing to a drm_ctx_res structure.

Returns

zero on success or a negative number on failure.

Definition at line 289 of file drm_context.c.

int drm_rmctx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Remove context.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	user argument pointing to a drm_ctx structure.

Returns

zero on success or a negative number on failure.

If not the special kernel context, calls ctxbitmap_free() to free the specified context.

Definition at line 434 of file drm_context.c.

int drm_setsareactx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Set per-context SAREA.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	user argument pointing to a drm_ctx_priv_map structure.

Returns

zero on success or a negative number on failure.

Searches the mapping specified in arg and update the entry in drm_device::ctx_idr with it.

Definition at line 187 of file drm_context.c.

int drm_switchctx	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Switch context.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	user argument pointing to a drm_ctx structure.

Returns

zero on success or a negative number on failure.

Calls context_switch().

Definition at line 392 of file drm_context.c.