Commit a13af4b4 authored by Dave Airlie's avatar Dave Airlie Committed by Dave Airlie
Browse files

agp: add chipset flushing support to AGP interface 



This bumps the AGP interface to 0.103.

Certain Intel chipsets contains a global write buffer, and this can require
flushing from the drm or X.org to make sure all data has hit RAM before
initiating a GPU transfer, due to a lack of coherency with the integrated
graphics device and this buffer.

This just adds generic support to the AGP interfaces, a follow-on patch
will add support to the Intel driver to use this interface.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 9ef9dc69

drivers/char/agp/agp.h

+2 −1
Original line number Diff line number Diff line
@@ -118,6 +118,7 @@ struct agp_bridge_driver { 
	void *(*agp_alloc_page)(struct agp_bridge_data *);

	void (*agp_destroy_page)(void *, int flags);

	int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);

	void (*chipset_flush)(struct agp_bridge_data *);

};



struct agp_bridge_data {

drivers/char/agp/backend.c

+1 −1
Original line number Diff line number Diff line
@@ -43,7 +43,7 @@ 
 * fix some real stupidity. It's only by chance we can bump

 * past 0.99 at all due to some boolean logic error. */

#define AGPGART_VERSION_MAJOR 0

#define AGPGART_VERSION_MINOR 102

#define AGPGART_VERSION_MINOR 103

static const struct agp_version agp_current_version =

{

	.major = AGPGART_VERSION_MAJOR,

drivers/char/agp/compat_ioctl.c

+4 −0
Original line number Diff line number Diff line
@@ -273,6 +273,10 @@ long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
	case AGPIOC_UNBIND32:

		ret_val = compat_agpioc_unbind_wrap(curr_priv, (void __user *) arg);

		break;



	case AGPIOC_CHIPSET_FLUSH32:

		ret_val = agpioc_chipset_flush_wrap(curr_priv);

		break;

	}



ioctl_out:

drivers/char/agp/compat_ioctl.h

+2 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#define AGPIOC_DEALLOCATE32 _IOW (AGPIOC_BASE, 7, compat_int_t)

#define AGPIOC_BIND32       _IOW (AGPIOC_BASE, 8, compat_uptr_t)

#define AGPIOC_UNBIND32     _IOW (AGPIOC_BASE, 9, compat_uptr_t)

#define AGPIOC_CHIPSET_FLUSH32 _IO (AGPIOC_BASE, 10)



struct agp_info32 {

	struct agp_version version;	/* version of the driver        */
@@ -101,5 +102,6 @@ void agp_free_memory_wrap(struct agp_memory *memory); 
struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type);

struct agp_memory *agp_find_mem_by_key(int key);

struct agp_client *agp_find_client_by_pid(pid_t id);

int agpioc_chipset_flush_wrap(struct agp_file_private *priv);



#endif /* _AGP_COMPAT_H */

drivers/char/agp/frontend.c

+11 −0
Original line number Diff line number Diff line
@@ -960,6 +960,13 @@ static int agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg) 
	return agp_unbind_memory(memory);

}



int agpioc_chipset_flush_wrap(struct agp_file_private *priv)

{

	DBG("");

	agp_flush_chipset(agp_bridge);

	return 0;

}



static int agp_ioctl(struct inode *inode, struct file *file,

		     unsigned int cmd, unsigned long arg)

{
@@ -1033,6 +1040,10 @@ static int agp_ioctl(struct inode *inode, struct file *file, 
	case AGPIOC_UNBIND:

		ret_val = agpioc_unbind_wrap(curr_priv, (void __user *) arg);

		break;

	       

	case AGPIOC_CHIPSET_FLUSH:

		ret_val = agpioc_chipset_flush_wrap(curr_priv);

		break;

	}



ioctl_out:

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