256 lines
7.5 KiB
C
256 lines
7.5 KiB
C
#ifndef QEMU_CHAR_H
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#define QEMU_CHAR_H
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#include "qemu-common.h"
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#include "qemu/queue.h"
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#include "qemu/option.h"
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#include "qemu/config-file.h"
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#include "block/aio.h"
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#include "qapi/qmp/qobject.h"
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#include "qapi/qmp/qstring.h"
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#include "qemu/main-loop.h"
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/* character device */
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#define CHR_EVENT_BREAK 0 /* serial break char */
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#define CHR_EVENT_FOCUS 1 /* focus to this terminal (modal input needed) */
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#define CHR_EVENT_OPENED 2 /* new connection established */
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#define CHR_EVENT_MUX_IN 3 /* mux-focus was set to this terminal */
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#define CHR_EVENT_MUX_OUT 4 /* mux-focus will move on */
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#define CHR_EVENT_CLOSED 5 /* connection closed */
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#define CHR_IOCTL_SERIAL_SET_PARAMS 1
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typedef struct {
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int speed;
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int parity;
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int data_bits;
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int stop_bits;
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} QEMUSerialSetParams;
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#define CHR_IOCTL_SERIAL_SET_BREAK 2
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#define CHR_IOCTL_PP_READ_DATA 3
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#define CHR_IOCTL_PP_WRITE_DATA 4
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#define CHR_IOCTL_PP_READ_CONTROL 5
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#define CHR_IOCTL_PP_WRITE_CONTROL 6
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#define CHR_IOCTL_PP_READ_STATUS 7
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#define CHR_IOCTL_PP_EPP_READ_ADDR 8
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#define CHR_IOCTL_PP_EPP_READ 9
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#define CHR_IOCTL_PP_EPP_WRITE_ADDR 10
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#define CHR_IOCTL_PP_EPP_WRITE 11
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#define CHR_IOCTL_PP_DATA_DIR 12
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#define CHR_IOCTL_SERIAL_SET_TIOCM 13
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#define CHR_IOCTL_SERIAL_GET_TIOCM 14
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#define CHR_TIOCM_CTS 0x020
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#define CHR_TIOCM_CAR 0x040
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#define CHR_TIOCM_DSR 0x100
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#define CHR_TIOCM_RI 0x080
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#define CHR_TIOCM_DTR 0x002
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#define CHR_TIOCM_RTS 0x004
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typedef void IOEventHandler(void *opaque, int event);
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struct CharDriverState {
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void (*init)(struct CharDriverState *s);
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int (*chr_write)(struct CharDriverState *s, const uint8_t *buf, int len);
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void (*chr_update_read_handler)(struct CharDriverState *s);
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int (*chr_ioctl)(struct CharDriverState *s, int cmd, void *arg);
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int (*get_msgfd)(struct CharDriverState *s);
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int (*chr_add_client)(struct CharDriverState *chr, int fd);
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IOEventHandler *chr_event;
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IOCanReadHandler *chr_can_read;
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IOReadHandler *chr_read;
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void *handler_opaque;
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void (*chr_close)(struct CharDriverState *chr);
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void (*chr_accept_input)(struct CharDriverState *chr);
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void (*chr_set_echo)(struct CharDriverState *chr, bool echo);
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void (*chr_guest_open)(struct CharDriverState *chr);
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void (*chr_guest_close)(struct CharDriverState *chr);
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void *opaque;
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QEMUTimer *open_timer;
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char *label;
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char *filename;
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int opened;
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int avail_connections;
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QTAILQ_ENTRY(CharDriverState) next;
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};
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/**
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* @qemu_chr_new_from_opts:
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*
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* Create a new character backend from a QemuOpts list.
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*
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* @opts see qemu-config.c for a list of valid options
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* @init not sure..
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*
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* Returns: a new character backend
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*/
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CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
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void (*init)(struct CharDriverState *s),
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Error **errp);
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/**
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* @qemu_chr_new:
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*
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* Create a new character backend from a URI.
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*
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* @label the name of the backend
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* @filename the URI
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* @init not sure..
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*
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* Returns: a new character backend
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*/
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CharDriverState *qemu_chr_new(const char *label, const char *filename,
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void (*init)(struct CharDriverState *s));
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/**
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* @qemu_chr_delete:
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*
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* Destroy a character backend.
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*/
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void qemu_chr_delete(CharDriverState *chr);
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/**
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* @qemu_chr_fe_set_echo:
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*
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* Ask the backend to override its normal echo setting. This only really
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* applies to the stdio backend and is used by the QMP server such that you
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* can see what you type if you try to type QMP commands.
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*
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* @echo true to enable echo, false to disable echo
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*/
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void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo);
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/**
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* @qemu_chr_fe_open:
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*
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* Open a character backend. This function call is an indication that the
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* front end is ready to begin doing I/O.
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*/
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void qemu_chr_fe_open(struct CharDriverState *chr);
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/**
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* @qemu_chr_fe_close:
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*
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* Close a character backend. This function call indicates that the front end
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* no longer is able to process I/O. To process I/O again, the front end will
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* call @qemu_chr_fe_open.
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*/
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void qemu_chr_fe_close(struct CharDriverState *chr);
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/**
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* @qemu_chr_fe_printf:
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*
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* Write to a character backend using a printf style interface.
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*
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* @fmt see #printf
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*/
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void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
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GCC_FMT_ATTR(2, 3);
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/**
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* @qemu_chr_fe_write:
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*
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* Write data to a character backend from the front end. This function will
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* send data from the front end to the back end.
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*
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* @buf the data
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* @len the number of bytes to send
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*
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* Returns: the number of bytes consumed
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*/
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int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len);
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/**
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* @qemu_chr_fe_ioctl:
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*
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* Issue a device specific ioctl to a backend.
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*
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* @cmd see CHR_IOCTL_*
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* @arg the data associated with @cmd
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*
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* Returns: if @cmd is not supported by the backend, -ENOTSUP, otherwise the
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* return value depends on the semantics of @cmd
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*/
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int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg);
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/**
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* @qemu_chr_fe_get_msgfd:
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*
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* For backends capable of fd passing, return the latest file descriptor passed
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* by a client.
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*
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* Returns: -1 if fd passing isn't supported or there is no pending file
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* descriptor. If a file descriptor is returned, subsequent calls to
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* this function will return -1 until a client sends a new file
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* descriptor.
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*/
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int qemu_chr_fe_get_msgfd(CharDriverState *s);
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/**
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* @qemu_chr_be_can_write:
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*
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* Determine how much data the front end can currently accept. This function
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* returns the number of bytes the front end can accept. If it returns 0, the
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* front end cannot receive data at the moment. The function must be polled
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* to determine when data can be received.
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*
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* Returns: the number of bytes the front end can receive via @qemu_chr_be_write
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*/
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int qemu_chr_be_can_write(CharDriverState *s);
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/**
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* @qemu_chr_be_write:
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*
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* Write data from the back end to the front end. Before issuing this call,
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* the caller should call @qemu_chr_be_can_write to determine how much data
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* the front end can currently accept.
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*
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* @buf a buffer to receive data from the front end
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* @len the number of bytes to receive from the front end
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*/
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void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len);
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/**
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* @qemu_chr_be_event:
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*
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* Send an event from the back end to the front end.
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*
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* @event the event to send
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*/
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void qemu_chr_be_event(CharDriverState *s, int event);
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void qemu_chr_add_handlers(CharDriverState *s,
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IOCanReadHandler *fd_can_read,
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IOReadHandler *fd_read,
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IOEventHandler *fd_event,
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void *opaque);
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void qemu_chr_generic_open(CharDriverState *s);
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void qemu_chr_accept_input(CharDriverState *s);
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int qemu_chr_add_client(CharDriverState *s, int fd);
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void qemu_chr_info_print(Monitor *mon, const QObject *ret_data);
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void qemu_chr_info(Monitor *mon, QObject **ret_data);
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CharDriverState *qemu_chr_find(const char *name);
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QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
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/* add an eventfd to the qemu devices that are polled */
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CharDriverState *qemu_chr_open_eventfd(int eventfd);
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extern int term_escape_char;
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/* memory chardev */
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void qemu_chr_init_mem(CharDriverState *chr);
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void qemu_chr_close_mem(CharDriverState *chr);
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QString *qemu_chr_mem_to_qs(CharDriverState *chr);
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size_t qemu_chr_mem_osize(const CharDriverState *chr);
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CharDriverState *qemu_char_get_next_serial(void);
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#endif
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