154 lines
5.2 KiB
C
154 lines
5.2 KiB
C
#ifndef _DRIVERS_DRIVERS_H
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#define _DRIVERS_DRIVERS_H
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#include <sys/types.h>
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#include <defines.h>
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#include <sys/uio.h>
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/* ---
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these hooks are how the kernel accesses the device
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--- */
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struct selectsync;
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typedef struct selectsync selectsync;
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typedef status_t (*device_open_hook) (const char *name, uint32 flags, void **cookie);
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typedef status_t (*device_close_hook) (void *cookie);
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typedef status_t (*device_free_hook) (void *cookie);
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typedef status_t (*device_control_hook) (void *cookie, uint32 op, void *data,
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size_t len);
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typedef ssize_t (*device_read_hook) (void *cookie, off_t position, void *data,
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size_t *numBytes);
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typedef ssize_t (*device_write_hook) (void *cookie, off_t position,
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const void *data, size_t *numBytes);
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typedef status_t (*device_select_hook) (void *cookie, uint8 event, uint32 ref,
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selectsync *sync);
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typedef status_t (*device_deselect_hook) (void *cookie, uint8 event,
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selectsync *sync);
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typedef status_t (*device_readv_hook) (void *cookie, off_t position, const iovec *vec,
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size_t count, size_t *numBytes);
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typedef status_t (*device_writev_hook) (void *cookie, off_t position, const iovec *vec,
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size_t count, size_t *numBytes);
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#define B_CUR_DRIVER_API_VERSION 2
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/* ---
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the device_hooks structure is a descriptor for the device, giving its
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entry points.
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--- */
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typedef struct {
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device_open_hook open; /* called to open the device */
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device_close_hook close; /* called to close the device */
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device_free_hook free; /* called to free the cookie */
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device_control_hook control; /* called to control the device */
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device_read_hook read; /* reads from the device */
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device_write_hook write; /* writes to the device */
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device_select_hook select; /* start select */
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device_deselect_hook deselect; /* stop select */
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device_readv_hook readv; /* scatter-gather read from the device */
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device_writev_hook writev; /* scatter-gather write to the device */
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} device_hooks;
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status_t init_hardware(void);
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const char **publish_devices(void);
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device_hooks *find_device(const char *name);
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status_t init_driver(void);
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void uninit_driver(void);
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extern int32 api_version;
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enum {
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// called on partition device to get info
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IOCTL_DEVFS_GET_PARTITION_INFO = 1000,
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// called on raw device to declare one partition
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IOCTL_DEVFS_SET_PARTITION,
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};
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typedef struct devfs_partition_info {
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// offset and size relative to raw device in bytes
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off_t offset;
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off_t size;
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// logical block size in bytes
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uint32 logical_block_size;
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// session/partition id
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uint32 session;
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uint32 partition;
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// path of raw device (GET_PARTITION_INFO only)
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char raw_device[SYS_MAX_PATH_LEN];
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} devfs_partition_info;
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enum {
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B_GET_DEVICE_SIZE = 1, /* get # bytes */
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/* returns size_t in *data */
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B_SET_DEVICE_SIZE, /* set # bytes */
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/* passed size_t in *data */
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B_SET_NONBLOCKING_IO, /* set to non-blocking i/o */
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B_SET_BLOCKING_IO, /* set to blocking i/o */
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B_GET_READ_STATUS, /* check if can read w/o blocking */
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/* returns bool in *data */
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B_GET_WRITE_STATUS, /* check if can write w/o blocking */
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/* returns bool in *data */
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B_GET_GEOMETRY, /* get info about device geometry */
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/* returns struct geometry in *data */
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B_GET_DRIVER_FOR_DEVICE, /* get the path of the executable serving that device */
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B_GET_PARTITION_INFO, /* get info about a device partition */
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/* returns struct partition_info in *data */
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B_SET_PARTITION, /* create a user-defined partition */
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B_FORMAT_DEVICE, /* low-level device format */
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B_EJECT_DEVICE, /* eject the media if supported */
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B_GET_ICON, /* return device icon (see struct below) */
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B_GET_BIOS_GEOMETRY, /* get info about device geometry */
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/* as reported by the bios */
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/* returns struct geometry in *data */
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B_GET_MEDIA_STATUS, /* get status of media. */
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/* return status_t in *data: */
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/* B_NO_ERROR: media ready */
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/* B_DEV_NO_MEDIA: no media */
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/* B_DEV_NOT_READY: device not ready */
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/* B_DEV_MEDIA_CHANGED: media changed */
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/* since open or last B_GET_MEDIA_STATUS */
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/* B_DEV_MEDIA_CHANGE_REQUESTED: user */
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/* pressed button on drive */
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/* B_DEV_DOOR_OPEN: door open */
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B_LOAD_MEDIA, /* load the media if supported */
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B_GET_BIOS_DRIVE_ID, /* get bios id for this device */
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B_SET_UNINTERRUPTABLE_IO, /* prevent cntl-C from interrupting i/o */
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B_SET_INTERRUPTABLE_IO, /* allow cntl-C to interrupt i/o */
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B_FLUSH_DRIVE_CACHE, /* flush drive cache */
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B_GET_NEXT_OPEN_DEVICE = 1000, /* iterate through open devices */
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B_ADD_FIXED_DRIVER, /* private */
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B_REMOVE_FIXED_DRIVER, /* private */
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B_AUDIO_DRIVER_BASE = 8000, /* base for codes in audio_driver.h */
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B_MIDI_DRIVER_BASE = 8100, /* base for codes in midi_driver.h */
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B_JOYSTICK_DRIVER_BASE = 8200, /* base for codes in joystick.h */
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B_GRAPHIC_DRIVER_BASE = 8300, /* base for codes in graphic_driver.h */
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B_DEVICE_OP_CODES_END = 9999 /* end of Be-defined contol id's */
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};
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#endif /* _DRIVERS_DRIVERS_H */
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