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'\" te .\" Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. .TH devmap_callback_ctl 9S "24 Jul 1996" "Oracle Solaris 11.4" "Kernel & Driver Data Structures" .SH NAME devmap_callback_ctl \- device mapping-control structure .SH SYNOPSIS .LP .nf #include <sys/ddidevmap.h> .fi .SH INTERFACE LEVEL .sp .LP Solaris DDI specific (Solaris DDI). .SH DESCRIPTION .sp .LP A \fBdevmap_callback_ctl\fR structure describes a set of callback routines that are called by the system to notify a device driver to manage events on the device mappings created by \fBdevmap_setup\fR(9F) or \fBddi_devmap_segmap\fR(9F). .sp .LP Device drivers pass the initialized \fBdevmap_callback_ctl\fR structure to either \fBdevmap_devmem_setup\fR(9F) or \fBdevmap_umem_setup\fR(9F) in the \fBdevmap\fR(9E) entry point during the mapping setup. The system makes a private copy of the structure for later use. Device drivers can specify different \fBdevmap_callback_ctl\fR for different mappings. .sp .LP A device driver should allocate the device mapping control structure and initialize the following fields, if the driver wants the entry points to be called by the system: .sp .ne 2 .mk .na \fB\fBdevmap_rev\fR \fR .ad .RS 17n .rt Version number. Set this to \fBDEVMAP_OPS_REV\fR. .RE .sp .ne 2 .mk .na \fB\fBdevmap_map\fR \fR .ad .RS 17n .rt Set to the address of the \fBdevmap_map\fR(9E) entry point or to \fINULL\fR if the driver does not support this callback. If set, the system calls the \fBdevmap_map\fR(9E) entry point during the \fBmmap\fR(2) system call. The drivers typically allocate driver private data structure in this function and return the pointer to the private data structure to the system for later use. .RE .sp .ne 2 .mk .na \fB\fBdevmap_access\fR \fR .ad .RS 17n .rt Set to the address of the \fBdevmap_access\fR(9E) entry point or to \fINULL\fR if the driver does not support this callback. If set, the system calls the driver's \fBdevmap_access\fR(9E) entry point during memory access. The system expects \fBdevmap_access\fR(9E) to call either \fBdevmap_do_ctxmgt\fR(9F) or \fBdevmap_default_access\fR(9F) to load the memory address translations before it returns to the system. .RE .sp .ne 2 .mk .na \fB\fBdevmap_dup\fR \fR .ad .RS 17n .rt Set to the address of the \fBdevmap_dup\fR(9E) entry point or to \fINULL\fR if the driver does not support this call. If set, the system calls the \fBdevmap_dup\fR(9E) entry point during the \fBfork\fR(2) system call. .RE .sp .ne 2 .mk .na \fB\fBdevmap_unmap\fR \fR .ad .RS 17n .rt Set to the address of the \fBdevmap_unmap\fR(9E) entry point or to \fINULL\fR if the driver does not support this call. If set, the system will call the \fBdevmap_unmap\fR(9E) entry point during the \fBmunmap\fR(2) or \fBexit\fR(2) system calls. .RE .SH STRUCTURE MEMBERS .sp .in +2 .nf int devmap_rev; int (*devmap_map)(devmap_cookie_t dhp, dev_t dev, uint_t flags,offset_t off, size_t len, void **pvtp); int (*devmap_access)(devmap_cookie_t dhp, void *pvtp, offset_t off, size_t len, uint_t type, uint_t rw); int (*devmap_dup)(devmap_cookie_t dhp, void *pvtp, devmap_cookie_t new_dhp, void **new_pvtp); void (*devmap_unmap)(devmap_cookie_t dhp, void *pvtp, offset_t off, size_t len, devmap_cookie_t new_dhp1, void **new_pvtp1, devmap_cookie_t new_dhp2, void **new_pvtp2); .fi .in -2 .sp .SH SEE ALSO .sp .LP \fBexit\fR(2), \fBfork\fR(2), \fBmmap\fR(2), \fBmunmap\fR(2), \fBdevmap\fR(9E), \fBdevmap_access\fR(9E), \fBdevmap_dup\fR(9E), \fBdevmap_map\fR(9E), \fBdevmap_unmap\fR(9E), \fBddi_devmap_segmap\fR(9F), \fBdevmap_default_access\fR(9F), \fBdevmap_devmem_setup\fR(9F), \fBdevmap_do_ctxmgt\fR(9F), \fBdevmap_setup\fR(9F), \fBdevmap_umem_setup\fR(9F) .sp .LP \fIWriting Device Drivers in Oracle Solaris 11.4\fR