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