Viewing file:  driver.h (4.74 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* $Id$
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
* Copyright (C) 2000 by Colin Ngam
*/
#ifndef _ASM_SN_DRIVER_H
#define _ASM_SN_DRIVER_H
/*
** Interface for device driver handle management.
**
** These functions are mostly for use by the loadable driver code, and
** for use by I/O bus infrastructure code.
*/
typedef struct device_driver_s *device_driver_t;
#define DEVICE_DRIVER_NONE (device_driver_t)NULL
/* == Driver thread priority support == */
typedef int ilvl_t;
/* default driver thread priority level */
#define DRIVER_THREAD_PRI_DEFAULT (ilvl_t)230
/* invalid driver thread priority level */
#define DRIVER_THREAD_PRI_INVALID (ilvl_t)-1
/* Associate a thread priority with a driver */
extern int device_driver_thread_pri_set(device_driver_t driver,
ilvl_t pri);
/* Get the thread priority associated with the driver */
extern ilvl_t device_driver_thread_pri_get(device_driver_t driver);
/* Get the thread priority for a driver from the sysgen paramters */
extern ilvl_t device_driver_sysgen_thread_pri_get(char *driver_prefix);
/* Initialize device driver functions. */
extern void device_driver_init(void);
/* Allocate a driver handle */
extern device_driver_t device_driver_alloc(char *prefix);
/* Free a driver handle */
extern void device_driver_free(device_driver_t driver);
/* Given a device driver prefix, return a handle to the driver. */
extern device_driver_t device_driver_get(char *prefix);
/* Given a device, return a handle to the driver. */
extern device_driver_t device_driver_getbydev(devfs_handle_t device);
struct cdevsw;
struct bdevsw;
/* Associate a driver with bdevsw/cdevsw pointers. */
extern int
device_driver_devsw_put(device_driver_t driver,
struct bdevsw *my_bdevsw,
struct cdevsw *my_cdevsw);
/* Given a driver, return the corresponding bdevsw and cdevsw pointers. */
extern void
device_driver_devsw_get( device_driver_t driver,
struct bdevsw **bdevswp,
struct cdevsw **cdevswp);
/* Given a driver, return its name (prefix). */
extern void device_driver_name_get(device_driver_t driver, char *buffer, int length);
/*
* A descriptor for every static device driver in the system.
* lboot creates a table of these and places in in master.c.
* device_driver_init runs through this table during initialization
* in order to "register" every static device driver.
*/
typedef struct static_device_driver_desc_s {
char *sdd_prefix;
struct bdevsw *sdd_bdevsw;
struct cdevsw *sdd_cdevsw;
} *static_device_driver_desc_t;
extern struct static_device_driver_desc_s static_device_driver_table[];
extern int static_devsw_count;
/*====== administration support ========== */
/* structure of each entry in the table created by lboot for
* device / driver administration
*/
typedef struct dev_admin_info_s {
char *dai_name; /* name of the device or driver
* prefix
*/
char *dai_param_name; /* device or driver parameter name */
char *dai_param_val; /* value of the parameter */
} dev_admin_info_t;
/* Update all the administrative hints associated with the device */
extern void device_admin_info_update(devfs_handle_t dev_vhdl);
/* Update all the administrative hints associated with the device driver */
extern void device_driver_admin_info_update(device_driver_t driver);
/* Get a particular administrative hint associated with a device */
extern char *device_admin_info_get(devfs_handle_t dev_vhdl,
char *info_lbl);
/* Associate a particular administrative hint for a device */
extern int device_admin_info_set(devfs_handle_t dev_vhdl,
char *info_lbl,
char *info_val);
/* Get a particular administrative hint associated with a device driver*/
extern char *device_driver_admin_info_get(char *driver_prefix,
char *info_name);
/* Associate a particular administrative hint for a device driver*/
extern int device_driver_admin_info_set(char *driver_prefix,
char *driver_info_lbl,
char *driver_info_val);
/* Initialize the extended device administrative hint table */
extern void device_admin_table_init(void);
/* Add a hint corresponding to a device to the extended device administrative
* hint table.
*/
extern void device_admin_table_update(char *dev_name,
char *param_name,
char *param_val);
/* Initialize the extended device driver administrative hint table */
extern void device_driver_admin_table_init(void);
/* Add a hint corresponding to a device to the extended device driver
* administrative hint table.
*/
extern void device_driver_admin_table_update(char *drv_prefix,
char *param_name,
char *param_val);
#endif /* _ASM_SN_DRIVER_H */
|