include/minix/chardriver.h

   1 #ifndef _MINIX_CHARDRIVER_H
   2 #define _MINIX_CHARDRIVER_H
   3
   4 #include <minix/driver.h>
   5
   6 /* Entry points into the device dependent code of character drivers. */
   7 struct chardriver {
   8   int(*cdr_open) (message *m_ptr);
   9   int(*cdr_close) (message *m_ptr);
  10   int(*cdr_ioctl) (message *m_ptr);
  11   struct device *(*cdr_prepare)(dev_t device);
  12   int(*cdr_transfer) (endpoint_t endpt, int opcode, u64_t position,
  13           iovec_t *iov, unsigned int nr_req, endpoint_t user_endpt, unsigned int
  14           flags);
  15   void(*cdr_cleanup) (void);
  16   void(*cdr_alarm) (message *m_ptr);
  17   int(*cdr_cancel) (message *m_ptr);
  18   int(*cdr_select) (message *m_ptr);
  19   int(*cdr_other) (message *m_ptr);
  20 };
  21
  22 #define CHARDRIVER_SYNC         0       /* use the synchronous protocol */
  23 #define CHARDRIVER_ASYNC        1       /* use the asynchronous protocol */
  24
  25 #define IS_CDEV_MINOR_RQ(type) (IS_DEV_RQ(type) && (type) != DEV_STATUS)
  26
  27 /* Functions defined by libchardriver. */
  28 void chardriver_announce(void);
  29 void chardriver_process(struct chardriver *cdp, int driver_type, message
  30         *m_ptr, int ipc_status);
  31 void chardriver_terminate(void);
  32 void chardriver_task(struct chardriver *cdp, int driver_type);
  33
  34 int do_nop(message *m_ptr);
  35 void nop_cleanup(void);
  36 void nop_alarm(message *m_ptr);
  37 int nop_cancel(message *m_ptr);
  38 int nop_select(message *m_ptr);
  39 int nop_ioctl(message *m_ptr);
  40
  41 #endif /* _MINIX_CHARDRIVER_H */