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38 * @(#)conf.h 8.5 (Berkeley) 1/9/95
39 * $FreeBSD: src/sys/sys/conf.h,v 1.103.2.6 2002/03/11 01:14:55 dd Exp $
40 * $DragonFly: src/sys/sys/conf.h,v 1.3 2003/06/23 17:55:50 dillon Exp $
46 #include <sys/queue.h>
48 #define SPECNAMELEN 15
56 #define SI_STASHED 0x0001 /* created in stashed storage */
58 LIST_ENTRY(specinfo) si_hash;
59 SLIST_HEAD(, vnode) si_hlist;
60 char si_name[SPECNAMELEN + 1];
61 void *si_drv1, *si_drv2;
62 struct cdevsw *si_devsw;
63 int si_iosize_max; /* maximum I/O size (for physio &al) */
66 struct tty *__sit_tty;
69 struct disk *__sid_disk;
70 struct mount *__sid_mountpoint;
71 int __sid_bsize_phys; /* min physical block size */
72 int __sid_bsize_best; /* optimal block size */
77 #define si_tty __si_u.__si_tty.__sit_tty
78 #define si_disk __si_u.__si_disk.__sid_disk
79 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
80 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
81 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best
86 #define v_hashchain v_rdev->si_hlist
87 #define v_specmountpoint v_rdev->si_mountpoint
90 * Special device management
93 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
96 * Definitions of device driver entry switches
105 * Note: d_thread_t is provided as a transition aid for those drivers
106 * that treat struct proc/struct thread as an opaque data type and
107 * exist in substantially the same form in both 4.x and 5.x. Writers
108 * of drivers that dips into the d_thread_t structure should use
109 * struct thread or struct proc as appropriate for the version of the
110 * OS they are using. It is provided in lieu of each device driver
111 * inventing its own way of doing this. While it does violate style(9)
112 * in a number of ways, this violation is deemed to be less
113 * important than the benefits that a uniform API between releases
116 * Users of struct thread/struct proc that aren't device drivers should
117 * not use d_thread_t.
123 typedef struct thread d_thread_t;
124 typedef int d_open_t __P((dev_t dev, int oflags, int devtype, d_thread_t *td));
125 typedef int d_close_t __P((dev_t dev, int fflag, int devtype, d_thread_t *td));
126 typedef void d_strategy_t __P((struct buf *bp));
127 typedef int d_parms_t __P((dev_t dev, struct specinfo *sinfo, int ctl));
128 typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
129 int fflag, d_thread_t *td));
130 typedef int d_dump_t __P((dev_t dev));
131 typedef int d_psize_t __P((dev_t dev));
133 typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag));
134 typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag));
135 typedef int d_poll_t __P((dev_t dev, int events, d_thread_t *td));
136 typedef int d_kqfilter_t __P((dev_t dev, struct knote *kn));
137 typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot));
139 typedef int l_open_t __P((dev_t dev, struct tty *tp));
140 typedef int l_close_t __P((struct tty *tp, int flag));
141 typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag));
142 typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag));
143 typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data,
144 int flag, d_thread_t *td));
145 typedef int l_rint_t __P((int c, struct tty *tp));
146 typedef int l_start_t __P((struct tty *tp));
147 typedef int l_modem_t __P((struct tty *tp, int flag));
150 * XXX: The dummy argument can be used to do what strategy1() never
151 * did anywhere: Create a per device flag to lock the device during
152 * label/slice surgery, all calls with a dummy == 0 gets stalled on
153 * a queue somewhere, whereas dummy == 1 are let through. Once out
154 * of surgery, reset the flag and restart all the stuff on the stall
157 #define BUF_STRATEGY(bp, dummy) (*devsw((bp)->b_dev)->d_strategy)(bp)
161 #define D_TAPE 0x0001
162 #define D_DISK 0x0002
166 #define D_TYPEMASK 0xffff
171 #define D_MEMDISK 0x00010000 /* memory type disk */
172 #define D_NAGGED 0x00020000 /* nagged about missing make_dev() */
173 #define D_CANFREE 0x00040000 /* can free blocks */
174 #define D_TRACKCLOSE 0x00080000 /* track all closes */
175 #define D_KQFILTER 0x00200000 /* has kqfilter entry */
178 * Character device switch table
188 d_strategy_t *d_strategy;
189 const char *d_name; /* base device name, e.g. 'vn' */
195 /* additions below are not binary compatible with 4.2 and below */
196 d_kqfilter_t *d_kqfilter;
200 * Line discipline switch table
215 extern struct linesw linesw[];
218 int ldisc_register __P((int , struct linesw *));
219 void ldisc_deregister __P((int));
220 #define LDISC_LOAD -1 /* Loadable line discipline */
227 udev_t sw_dev; /* For quasibogus swapdev reporting */
233 #define SW_FREED 0x01
234 #define SW_SEQUENTIAL 0x02
235 #define sw_freed sw_flags /* XXX compat */
244 d_kqfilter_t nokqfilter;
245 #define nostrategy ((d_strategy_t *)NULL)
246 #define nopoll seltrue
250 #define NUMCDEVSW 256
253 * nopsize is little used, so not worth having dummy functions for.
255 #define nopsize ((d_psize_t *)NULL)
260 l_ioctl_t l_nullioctl;
266 struct devsw_module_data {
267 int (*chainevh)(struct module *, int, void *); /* next handler */
268 void *chainarg; /* arg for next event handler */
269 /* Do not initialize fields hereafter */
272 #define DEV_MODULE(name, evh, arg) \
273 static moduledata_t name##_mod = { \
278 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
281 int cdevsw_add __P((struct cdevsw *new));
282 int cdevsw_remove __P((struct cdevsw *old));
283 int count_dev __P((dev_t dev));
284 void destroy_dev __P((dev_t dev));
285 struct cdevsw *devsw __P((dev_t dev));
286 const char *devtoname __P((dev_t dev));
287 void freedev __P((dev_t dev));
288 int iszerodev __P((dev_t dev));
289 dev_t makebdev __P((int maj, int min));
290 dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...)) __printflike(6, 7);
291 int lminor __P((dev_t dev));
292 void setconf __P((void));
293 dev_t getdiskbyname(char *name);
296 * XXX: This included for when DEVFS resurfaces
305 #define GID_OPERATOR 5
308 #define GID_DIALER 68
312 #endif /* !_SYS_CONF_H_ */