Archipelago » qemu

#ifndef QEMU_CHAR_H

#define QEMU_CHAR_H

#include "qemu-common.h"

#include "qemu/queue.h"

#include "qemu/option.h"

#include "qemu/config-file.h"

#include "block/aio.h"

#include "qapi/qmp/qobject.h"

#include "qapi/qmp/qstring.h"

#include "qemu/main-loop.h"

/* character device */

#define CHR_EVENT_BREAK   0 /* serial break char */

#define CHR_EVENT_FOCUS   1 /* focus to this terminal (modal input needed) */

#define CHR_EVENT_OPENED  2 /* new connection established */

#define CHR_EVENT_MUX_IN  3 /* mux-focus was set to this terminal */

#define CHR_EVENT_MUX_OUT 4 /* mux-focus will move on */

#define CHR_EVENT_CLOSED  5 /* connection closed */

#define CHR_IOCTL_SERIAL_SET_PARAMS   1

typedef struct {

    int speed;

    int parity;

    int data_bits;

    int stop_bits;

} QEMUSerialSetParams;

#define CHR_IOCTL_SERIAL_SET_BREAK    2

#define CHR_IOCTL_PP_READ_DATA        3

#define CHR_IOCTL_PP_WRITE_DATA       4

#define CHR_IOCTL_PP_READ_CONTROL     5

#define CHR_IOCTL_PP_WRITE_CONTROL    6

#define CHR_IOCTL_PP_READ_STATUS      7

#define CHR_IOCTL_PP_EPP_READ_ADDR    8

#define CHR_IOCTL_PP_EPP_READ         9

#define CHR_IOCTL_PP_EPP_WRITE_ADDR  10

#define CHR_IOCTL_PP_EPP_WRITE       11

#define CHR_IOCTL_PP_DATA_DIR        12

#define CHR_IOCTL_SERIAL_SET_TIOCM   13

#define CHR_IOCTL_SERIAL_GET_TIOCM   14

#define CHR_TIOCM_CTS        0x020

#define CHR_TIOCM_CAR        0x040

#define CHR_TIOCM_DSR        0x100

#define CHR_TIOCM_RI        0x080

#define CHR_TIOCM_DTR        0x002

#define CHR_TIOCM_RTS        0x004

typedef void IOEventHandler(void *opaque, int event);

struct CharDriverState {

    void (*init)(struct CharDriverState *s);

    int (*chr_write)(struct CharDriverState *s, const uint8_t *buf, int len);

    GSource *(*chr_add_watch)(struct CharDriverState *s, GIOCondition cond);

    void (*chr_update_read_handler)(struct CharDriverState *s);

    int (*chr_ioctl)(struct CharDriverState *s, int cmd, void *arg);

    int (*get_msgfd)(struct CharDriverState *s);

    int (*chr_add_client)(struct CharDriverState *chr, int fd);

    IOEventHandler *chr_event;

    IOCanReadHandler *chr_can_read;

    IOReadHandler *chr_read;

    void *handler_opaque;

    void (*chr_close)(struct CharDriverState *chr);

    void (*chr_accept_input)(struct CharDriverState *chr);

    void (*chr_set_echo)(struct CharDriverState *chr, bool echo);

    void (*chr_set_fe_open)(struct CharDriverState *chr, int fe_open);

    void *opaque;

    int idle_tag;

    char *label;

    char *filename;

    int be_open;

    int fe_open;

    int explicit_fe_open;

    int avail_connections;

    QemuOpts *opts;

    QTAILQ_ENTRY(CharDriverState) next;

};

/**

 * @qemu_chr_new_from_opts:

 *

 * Create a new character backend from a QemuOpts list.

 *

 * @opts see qemu-config.c for a list of valid options

 * @init not sure..

 *

 * Returns: a new character backend

 */

CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,

                                    void (*init)(struct CharDriverState *s),

                                    Error **errp);

/**

 * @qemu_chr_new:

 *

 * Create a new character backend from a URI.

 *

 * @label the name of the backend

 * @filename the URI

 * @init not sure..

 *

 * Returns: a new character backend

 */

CharDriverState *qemu_chr_new(const char *label, const char *filename,

                              void (*init)(struct CharDriverState *s));

/**

 * @qemu_chr_delete:

 *

 * Destroy a character backend.

 */

void qemu_chr_delete(CharDriverState *chr);

/**

 * @qemu_chr_fe_set_echo:

 *

 * Ask the backend to override its normal echo setting.  This only really

 * applies to the stdio backend and is used by the QMP server such that you

 * can see what you type if you try to type QMP commands.

 *

 * @echo true to enable echo, false to disable echo

 */

void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo);

/**

 * @qemu_chr_fe_set_open:

 *

 * Set character frontend open status.  This is an indication that the

 * front end is ready (or not) to begin doing I/O.

 */

void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open);

/**

 * @qemu_chr_fe_printf:

 *

 * Write to a character backend using a printf style interface.

 *

 * @fmt see #printf

 */

void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)

    GCC_FMT_ATTR(2, 3);

int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,

                          GIOFunc func, void *user_data);

/**

 * @qemu_chr_fe_write:

 *

 * Write data to a character backend from the front end.  This function will

 * send data from the front end to the back end.

 *

 * @buf the data

 * @len the number of bytes to send

 *

 * Returns: the number of bytes consumed

 */

int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len);

/**

 * @qemu_chr_fe_write_all:

 *

 * Write data to a character backend from the front end.  This function will

 * send data from the front end to the back end.  Unlike @qemu_chr_fe_write,

 * this function will block if the back end cannot consume all of the data

 * attempted to be written.

 *

 * @buf the data

 * @len the number of bytes to send

 *

 * Returns: the number of bytes consumed

 */

int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len);

/**

 * @qemu_chr_fe_ioctl:

 *

 * Issue a device specific ioctl to a backend.

 *

 * @cmd see CHR_IOCTL_*

 * @arg the data associated with @cmd

 *

 * Returns: if @cmd is not supported by the backend, -ENOTSUP, otherwise the

 *          return value depends on the semantics of @cmd

 */

int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg);

/**

 * @qemu_chr_fe_get_msgfd:

 *

 * For backends capable of fd passing, return the latest file descriptor passed

 * by a client.

 *

 * Returns: -1 if fd passing isn't supported or there is no pending file

 *          descriptor.  If a file descriptor is returned, subsequent calls to

 *          this function will return -1 until a client sends a new file

 *          descriptor.

 */

int qemu_chr_fe_get_msgfd(CharDriverState *s);

/**

 * @qemu_chr_fe_claim:

 *

 * Claim a backend before using it, should be called before calling

 * qemu_chr_add_handlers(). 

 *

 * Returns: -1 if the backend is already in use by another frontend, 0 on

 *          success.

 */

int qemu_chr_fe_claim(CharDriverState *s);

/**

 * @qemu_chr_fe_claim_no_fail:

 *

 * Like qemu_chr_fe_claim, but will exit qemu with an error when the

 * backend is already in use.

 */

void qemu_chr_fe_claim_no_fail(CharDriverState *s);

/**

 * @qemu_chr_fe_claim:

 *

 * Release a backend for use by another frontend.

 *

 * Returns: -1 if the backend is already in use by another frontend, 0 on

 *          success.

 */

void qemu_chr_fe_release(CharDriverState *s);

/**

 * @qemu_chr_be_can_write:

 *

 * Determine how much data the front end can currently accept.  This function

 * returns the number of bytes the front end can accept.  If it returns 0, the

 * front end cannot receive data at the moment.  The function must be polled

 * to determine when data can be received.

 *

 * Returns: the number of bytes the front end can receive via @qemu_chr_be_write

 */

int qemu_chr_be_can_write(CharDriverState *s);

/**

 * @qemu_chr_be_write:

 *

 * Write data from the back end to the front end.  Before issuing this call,

 * the caller should call @qemu_chr_be_can_write to determine how much data

 * the front end can currently accept.

 *

 * @buf a buffer to receive data from the front end

 * @len the number of bytes to receive from the front end

 */

void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len);

/**

 * @qemu_chr_be_event:

 *

 * Send an event from the back end to the front end.

 *

 * @event the event to send

 */

void qemu_chr_be_event(CharDriverState *s, int event);

void qemu_chr_add_handlers(CharDriverState *s,

                           IOCanReadHandler *fd_can_read,

                           IOReadHandler *fd_read,

                           IOEventHandler *fd_event,

                           void *opaque);

void qemu_chr_be_generic_open(CharDriverState *s);

void qemu_chr_accept_input(CharDriverState *s);

int qemu_chr_add_client(CharDriverState *s, int fd);

void qemu_chr_info_print(Monitor *mon, const QObject *ret_data);

void qemu_chr_info(Monitor *mon, QObject **ret_data);

CharDriverState *qemu_chr_find(const char *name);

QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);

void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *));

void register_char_driver_qapi(const char *name, int kind,

        void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp));

/* add an eventfd to the qemu devices that are polled */

CharDriverState *qemu_chr_open_eventfd(int eventfd);

extern int term_escape_char;

/* memory chardev */

void qemu_chr_init_mem(CharDriverState *chr);

void qemu_chr_close_mem(CharDriverState *chr);

QString *qemu_chr_mem_to_qs(CharDriverState *chr);

size_t qemu_chr_mem_osize(const CharDriverState *chr);

CharDriverState *qemu_char_get_next_serial(void);

/* msmouse */

CharDriverState *qemu_chr_open_msmouse(void);

/* baum.c */

CharDriverState *chr_baum_init(void);

#endif