42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
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/*
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Copyright (C) 2016-2019 The University of Notre Dame
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This software is distributed under the GNU General Public License.
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See the file LICENSE for details.
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*/
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#ifndef DEVICE_H
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#define DEVICE_H
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#include "kernel/stats.h"
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#include "kernel/types.h"
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struct device_driver {
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const char *name;
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int (*probe) ( int unit, int *nblocks, int *blocksize, char *info );
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int (*read) ( int unit, void *buffer, int nblocks, int block_offset);
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int (*read_nonblock) ( int unit, void *buffer, int nblocks, int block_offset);
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int (*write) ( int unit, const void *buffer, int nblocks, int block_offset);
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int multiplier;
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struct device_driver_stats stats;
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struct device_driver *next;
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};
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void device_driver_register( struct device_driver *d );
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struct device *device_open(const char *name, int unit);
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struct device *device_addref( struct device *d );
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void device_close( struct device *d );
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int device_read(struct device *d, void *buffer, int size, int offset);
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int device_read_nonblock(struct device *d, void *buffer, int size, int offset);
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int device_write(struct device *d, const void *buffer, int size, int offset);
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int device_block_size( struct device *d );
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int device_nblocks( struct device *d );
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int device_unit( struct device *d );
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const char * device_name( struct device *d );
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void device_driver_get_stats(const char * name, struct device_driver_stats * s);
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struct device_driver * device_driver_lookup(const char *name);
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#endif
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