bp_copyin(9F) Kernel Functions for Drivers bp_copyin(9F)NAME
bp_copyin - copy from a buf(9S) into a driver buffer
SYNOPSIS
#include <sys/types.h>
#include <sys/buf.h>
int bp_copyin(struct buf *bp, void *driverbuf, offset_t offset,
size_t size);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
bp Pointer to the buffer header structure to copy from.
driverbuf Driver buffer to copy to.
offset Offset into bp where to start copying.
size Size of copy.
DESCRIPTION
The bp_copyin() function copies size bytes into the memory associated with bp to the destination driver buffer driverbuf. The offset only
applies to bp.
RETURN VALUES
Under normal conditions, 0 is returned to indicate a successful copy. Otherwise, -1 is returned if bp references invalid pages.
CONTEXT
The bp_copyin() function can be called from user or kernel context only.
SEE ALSO bp_copyout(9F), bp_mapin(9F), bp_mapout(9F), ddi_copyout(9F), buf(9S)SunOS 5.11 16 Oct 2007 bp_copyin(9F)
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bp_mapout(9F) Kernel Functions for Drivers bp_mapout(9F)NAME
bp_mapout - deallocate virtual address space
SYNOPSIS
#include <sys/types.h>
#include <sys/buf.h>
void bp_mapout(struct buf *bp);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
bp Pointer to the buffer header structure.
DESCRIPTION
bp_mapout() deallocates system virtual address space allocated by a previous call to bp_mapin(9F).bp_mapout() should only be called on
buffers which have been allocated and are owned by the device driver. It must not be called on buffers passed to the driver through the
strategy(9E) entry point (for example a filesystem). Because bp_mapin(9F) does not keep a reference count, bp_mapout() will wipe out any
kernel mapping that a layer above the device driver might rely on.
CONTEXT
bp_mapout() can be called from user context only.
SEE ALSO strategy(9E), bp_mapin(9F), buf(9S)
Writing Device Drivers
SunOS 5.11 15 Nov 1996 bp_mapout(9F)
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