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6 .TH DEVMAP_CALLBACK_CTL 9S "Jul 24, 1996"
8 devmap_callback_ctl \- device mapping-control structure
12 #include <sys/ddidevmap.h>
18 Solaris DDI specific (Solaris DDI).
22 A \fBdevmap_callback_ctl\fR structure describes a set of callback routines that
23 are called by the system to notify a device driver to manage events on the
24 device mappings created by \fBdevmap_setup\fR(9F) or
25 \fBddi_devmap_segmap\fR(9F).
28 Device drivers pass the initialized \fBdevmap_callback_ctl\fR structure to
29 either \fBdevmap_devmem_setup\fR(9F) or \fBdevmap_umem_setup\fR(9F) in the
30 \fBdevmap\fR(9E) entry point during the mapping setup. The system makes a
31 private copy of the structure for later use. Device drivers can specify
32 different \fBdevmap_callback_ctl\fR for different mappings.
35 A device driver should allocate the device mapping control structure and
36 initialize the following fields, if the driver wants the entry points to be
41 \fB\fBdevmap_rev\fR \fR
44 Version number. Set this to \fBDEVMAP_OPS_REV\fR.
50 \fB\fBdevmap_map\fR \fR
53 Set to the address of the \fBdevmap_map\fR(9E) entry point or to \fINULL\fR if
54 the driver does not support this callback. If set, the system calls the
55 \fBdevmap_map\fR(9E) entry point during the \fBmmap\fR(2) system call. The
56 drivers typically allocate driver private data structure in this function and
57 return the pointer to the private data structure to the system for later use.
63 \fB\fBdevmap_access\fR \fR
66 Set to the address of the \fBdevmap_access\fR(9E) entry point or to \fINULL\fR
67 if the driver does not support this callback. If set, the system calls the
68 driver's \fBdevmap_access\fR(9E) entry point during memory access. The system
69 expects \fBdevmap_access\fR(9E) to call either \fBdevmap_do_ctxmgt\fR(9F) or
70 \fBdevmap_default_access\fR(9F) to load the memory address translations before
71 it returns to the system.
77 \fB\fBdevmap_dup\fR \fR
80 Set to the address of the \fBdevmap_dup\fR(9E) entry point or to \fINULL\fR if
81 the driver does not support this call. If set, the system calls the
82 \fBdevmap_dup\fR(9E) entry point during the \fBfork\fR(2) system call.
88 \fB\fBdevmap_unmap\fR \fR
91 Set to the address of the \fBdevmap_unmap\fR(9E) entry point or to \fINULL\fR
92 if the driver does not support this call. If set, the system will call the
93 \fBdevmap_unmap\fR(9E) entry point during the \fBmunmap\fR(2) or \fBexit\fR(2)
102 int (*devmap_map)(devmap_cookie_t dhp, dev_t dev,
103 uint_t flags,offset_t off, size_t len, void **pvtp);
104 int (*devmap_access)(devmap_cookie_t dhp, void *pvtp,
105 offset_t off, size_t len, uint_t type, uint_t rw);
106 int (*devmap_dup)(devmap_cookie_t dhp, void *pvtp,
107 devmap_cookie_t new_dhp, void **new_pvtp);
108 void (*devmap_unmap)(devmap_cookie_t dhp, void *pvtp,
109 offset_t off, size_t len, devmap_cookie_t new_dhp1,
110 void **new_pvtp1, devmap_cookie_t new_dhp2, void **new_pvtp2);
117 \fBexit\fR(2), \fBfork\fR(2), \fBmmap\fR(2), \fBmunmap\fR(2), \fBdevmap\fR(9E),
118 \fBdevmap_access\fR(9E), \fBdevmap_dup\fR(9E), \fBdevmap_map\fR(9E),
119 \fBdevmap_unmap\fR(9E), \fBddi_devmap_segmap\fR(9F),
120 \fBdevmap_default_access\fR(9F), \fBdevmap_devmem_setup\fR(9F),
121 \fBdevmap_do_ctxmgt\fR(9F), \fBdevmap_setup\fR(9F), \fBdevmap_umem_setup\fR(9F)
124 \fIWriting Device Drivers\fR