rrm.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:2k
- /*
- * Linux Rendering Resource Manager
- *
- * Implements the SGI-compatible rendering resource manager.
- * This takes care of implementing the virtualized video hardware
- * access required for OpenGL direct rendering.
- *
- * Author: Miguel de Icaza (miguel@nuclecu.unam.mx)
- *
- * Fixes:
- */
- #include <linux/module.h>
- #include <asm/uaccess.h>
- #include <asm/rrm.h>
- int
- rrm_open_rn (int rnid, void *arg)
- {
- return 0;
- }
- int
- rrm_close_rn (int rnid, void *arg)
- {
- return 0;
- }
- int
- rrm_bind_proc_to_rn (int rnid, void *arg)
- {
- return 0;
- }
- typedef int (*rrm_function )(void *arg);
- struct {
- int (*r_fn)(int rnid, void *arg);
- int arg_size;
- } rrm_functions [] = {
- { rrm_open_rn, sizeof (struct RRM_OpenRN) },
- { rrm_close_rn, sizeof (struct RRM_CloseRN) },
- { rrm_bind_proc_to_rn, sizeof (struct RRM_BindProcToRN) }
- };
- #define RRM_FUNCTIONS (sizeof (rrm_functions)/sizeof (rrm_functions [0]))
- /* cmd is a number in the range [0..RRM_CMD_LIMIT-RRM_BASE] */
- int
- rrm_command (unsigned int cmd, void *arg)
- {
- int i, rnid;
-
- if (cmd > RRM_FUNCTIONS){
- printk ("Called unimplemented rrm ioctl: %dn", cmd + RRM_BASE);
- return -EINVAL;
- }
- i = verify_area (VERIFY_READ, arg, rrm_functions [cmd].arg_size);
- if (i) return i;
- if (__get_user (rnid, (int *) arg))
- return -EFAULT;
- return (*(rrm_functions [cmd].r_fn))(rnid, arg);
- }
- int
- rrm_close (struct inode *inode, struct file *file)
- {
- /* This routine is invoked when the device is closed */
- return 0;
- }
- EXPORT_SYMBOL(rrm_command);
- EXPORT_SYMBOL(rrm_close);