63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
#ifndef _MINIX_BLOCKDRIVER_H
|
|
#define _MINIX_BLOCKDRIVER_H
|
|
|
|
#include <minix/driver.h>
|
|
|
|
typedef int device_id_t;
|
|
typedef int thread_id_t;
|
|
|
|
/* Types supported for the 'type' field of struct blockdriver. */
|
|
typedef enum {
|
|
BLOCKDRIVER_TYPE_DISK, /* handle partition requests */
|
|
BLOCKDRIVER_TYPE_OTHER /* do not handle partition requests */
|
|
} blockdriver_type_t;
|
|
|
|
/* Entry points into the device dependent code of block drivers. */
|
|
struct blockdriver {
|
|
blockdriver_type_t bdr_type;
|
|
int(*bdr_open) (dev_t minor, int access);
|
|
int(*bdr_close) (dev_t minor);
|
|
ssize_t(*bdr_transfer) (dev_t minor, int do_write, u64_t pos,
|
|
endpoint_t endpt, iovec_t *iov, unsigned count, int flags);
|
|
int(*bdr_ioctl) (dev_t minor, unsigned int request, endpoint_t endpt,
|
|
cp_grant_id_t grant);
|
|
void(*bdr_cleanup) (void);
|
|
struct device *(*bdr_part)(dev_t minor);
|
|
void(*bdr_geometry) (dev_t minor, struct part_geom *part);
|
|
void(*bdr_intr) (unsigned int irqs);
|
|
void(*bdr_alarm) (clock_t stamp);
|
|
int(*bdr_other) (message *m_ptr);
|
|
int(*bdr_device) (dev_t minor, device_id_t *id);
|
|
};
|
|
|
|
/* Functions defined by libblockdriver. These can be used for both
|
|
* singlethreaded and multithreaded drivers.
|
|
*/
|
|
void blockdriver_announce(int type);
|
|
|
|
#ifndef _BLOCKDRIVER_MT_API
|
|
/* Additional functions for the singlethreaded version. These allow the driver
|
|
* to either use the stock driver_task(), or implement its own message loop.
|
|
* To avoid accidents, these functions are not exposed when minix/driver_mt.h
|
|
* has been included previously.
|
|
*/
|
|
int blockdriver_receive_mq(message *m_ptr, int *status_ptr);
|
|
void blockdriver_process(struct blockdriver *dp, message *m_ptr, int
|
|
ipc_status);
|
|
void blockdriver_terminate(void);
|
|
void blockdriver_task(struct blockdriver *bdp);
|
|
int blockdriver_mq_queue(message *m_ptr, int status);
|
|
#endif /* !_BLOCKDRIVER_MT_API */
|
|
|
|
/* Parameters for the disk drive. */
|
|
#define SECTOR_SIZE 512 /* physical sector size in bytes */
|
|
#define SECTOR_SHIFT 9 /* for division */
|
|
#define SECTOR_MASK 511 /* and remainder */
|
|
|
|
#define CD_SECTOR_SIZE 2048 /* sector size of a CD-ROM in bytes */
|
|
|
|
/* Size of the DMA buffer buffer in bytes. */
|
|
#define DMA_BUF_SIZE (DMA_SECTORS * SECTOR_SIZE)
|
|
|
|
#endif /* _MINIX_BLOCKDRIVER_H */
|