fd4c2b74f3
The implementation is in libblockdriver, and works transparently for all block drivers. The new btrace(8) tool can be used to control block tracing; see ``man btrace'' for details.
55 lines
2.2 KiB
C
55 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 thread_id_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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_PROTOTYPE( int (*bdr_open), (dev_t minor, int access) );
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_PROTOTYPE( int (*bdr_close), (dev_t minor) );
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_PROTOTYPE( 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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_PROTOTYPE( int (*bdr_ioctl), (dev_t minor, unsigned int request,
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endpoint_t endpt, cp_grant_id_t grant) );
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_PROTOTYPE( void (*bdr_cleanup), (void) );
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_PROTOTYPE( struct device *(*bdr_part), (dev_t minor) );
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_PROTOTYPE( void (*bdr_geometry), (dev_t minor, struct partition *part) );
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_PROTOTYPE( void (*bdr_intr), (unsigned int irqs) );
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_PROTOTYPE( void (*bdr_alarm), (clock_t stamp) );
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_PROTOTYPE( int (*bdr_other), (message *m_ptr) );
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_PROTOTYPE( int (*bdr_thread), (dev_t minor, thread_id_t *threadp) );
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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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_PROTOTYPE( void blockdriver_announce, (void) );
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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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_PROTOTYPE( int blockdriver_receive_mq, (message *m_ptr, int *status_ptr) );
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_PROTOTYPE( void blockdriver_process, (struct blockdriver *dp, message *m_ptr,
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int ipc_status) );
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_PROTOTYPE( void blockdriver_terminate, (void) );
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_PROTOTYPE( void blockdriver_task, (struct blockdriver *bdp) );
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_PROTOTYPE( 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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