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999bd67c87
This driver handles in-memory chardev operations. That's, all writes to this driver are stored in an internal buffer and it doesn't talk to the external world in any way. Right now it's very simple: it supports only writes. But it can be easily extended to support more operations. This is going to be used by the monitor's "HMP passthrough via QMP" feature, which needs to run monitor handlers without a backing device. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
122 lines
4.2 KiB
C
122 lines
4.2 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.h"
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#include "qobject.h"
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#include "qstring.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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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_send_event)(struct CharDriverState *chr, int event);
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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 *opaque;
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QEMUBH *bh;
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char *label;
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char *filename;
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int opened;
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QTAILQ_ENTRY(CharDriverState) next;
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};
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QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
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CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
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void (*init)(struct CharDriverState *s));
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CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s));
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void qemu_chr_close(CharDriverState *chr);
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void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
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GCC_FMT_ATTR(2, 3);
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int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len);
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void qemu_chr_send_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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int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg);
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void qemu_chr_generic_open(CharDriverState *s);
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int qemu_chr_can_read(CharDriverState *s);
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void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len);
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int qemu_chr_get_msgfd(CharDriverState *s);
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void qemu_chr_accept_input(CharDriverState *s);
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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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/* 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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/* async I/O support */
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int qemu_set_fd_handler2(int fd,
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IOCanReadHandler *fd_read_poll,
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IOHandler *fd_read,
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IOHandler *fd_write,
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void *opaque);
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int qemu_set_fd_handler(int fd,
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IOHandler *fd_read,
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IOHandler *fd_write,
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void *opaque);
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#endif
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