include/minix/chardriver.h

   1 #ifndef _MINIX_CHARDRIVER_H
   2 #define _MINIX_CHARDRIVER_H
   3
   4 #include <minix/driver.h>
   5
   6 typedef unsigned int cdev_id_t;
   7
   8 /* Entry points into the device dependent code of character drivers. */
   9 struct chardriver {
  10   int (*cdr_open)(devminor_t minor, int access, endpoint_t user_endpt);
  11   int (*cdr_close)(devminor_t minor);
  12   ssize_t (*cdr_read)(devminor_t minor, u64_t position, endpoint_t endpt,
  13         cp_grant_id_t grant, size_t size, int flags, cdev_id_t id);
  14   ssize_t (*cdr_write)(devminor_t minor, u64_t position, endpoint_t endpt,
  15         cp_grant_id_t grant, size_t size, int flags, cdev_id_t id);
  16   int (*cdr_ioctl)(devminor_t minor, unsigned long request, endpoint_t endpt,
  17         cp_grant_id_t grant, int flags, endpoint_t user_endpt, cdev_id_t id);
  18   int (*cdr_cancel)(devminor_t minor, endpoint_t endpt, cdev_id_t id);
  19   int (*cdr_select)(devminor_t minor, unsigned int ops, endpoint_t endpt);
  20   void (*cdr_intr)(unsigned int mask);
  21   void (*cdr_alarm)(clock_t stamp);
  22   void (*cdr_other)(message *m_ptr, int ipc_status);
  23 };
  24
  25 /* Functions defined by libchardriver. */
  26 void chardriver_announce(void);
  27 int chardriver_get_minor(message *m, devminor_t *minor);
  28 void chardriver_process(struct chardriver *cdp, message *m_ptr,
  29         int ipc_status);
  30 void chardriver_terminate(void);
  31 void chardriver_task(struct chardriver *cdp);
  32
  33 void chardriver_reply_task(endpoint_t endpt, cdev_id_t id, int r);
  34 void chardriver_reply_select(endpoint_t endpt, devminor_t minor, int ops);
  35
  36 #endif /* _MINIX_CHARDRIVER_H */