mirror of
https://github.com/qemu/qemu.git
synced 2024-12-05 17:53:36 +08:00
83f7d43a9e
Replace device_init() with generalized type_init(). While at it, unify naming convention: type_init([$prefix_]register_types) Also, type_init() is a function, so add preceding blank line where necessary and don't put a semicolon after the closing brace. Signed-off-by: Andreas Färber <afaerber@suse.de> Cc: Anthony Liguori <anthony@codemonkey.ws> Cc: malc <av1474@comtv.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
183 lines
4.8 KiB
C
183 lines
4.8 KiB
C
/*
|
|
* Virtio Console and Generic Serial Port Devices
|
|
*
|
|
* Copyright Red Hat, Inc. 2009, 2010
|
|
*
|
|
* Authors:
|
|
* Amit Shah <amit.shah@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#include "qemu-char.h"
|
|
#include "qemu-error.h"
|
|
#include "trace.h"
|
|
#include "virtio-serial.h"
|
|
|
|
typedef struct VirtConsole {
|
|
VirtIOSerialPort port;
|
|
CharDriverState *chr;
|
|
} VirtConsole;
|
|
|
|
|
|
/* Callback function that's called when the guest sends us data */
|
|
static ssize_t flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len)
|
|
{
|
|
VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
|
|
ssize_t ret;
|
|
|
|
if (!vcon->chr) {
|
|
/* If there's no backend, we can just say we consumed all data. */
|
|
return len;
|
|
}
|
|
|
|
ret = qemu_chr_fe_write(vcon->chr, buf, len);
|
|
trace_virtio_console_flush_buf(port->id, len, ret);
|
|
|
|
if (ret < 0) {
|
|
/*
|
|
* Ideally we'd get a better error code than just -1, but
|
|
* that's what the chardev interface gives us right now. If
|
|
* we had a finer-grained message, like -EPIPE, we could close
|
|
* this connection. Absent such error messages, the most we
|
|
* can do is to return 0 here.
|
|
*
|
|
* This will prevent stray -1 values to go to
|
|
* virtio-serial-bus.c and cause abort()s in
|
|
* do_flush_queued_data().
|
|
*/
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* Callback function that's called when the guest opens the port */
|
|
static void guest_open(VirtIOSerialPort *port)
|
|
{
|
|
VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
|
|
|
|
if (!vcon->chr) {
|
|
return;
|
|
}
|
|
qemu_chr_fe_open(vcon->chr);
|
|
}
|
|
|
|
/* Callback function that's called when the guest closes the port */
|
|
static void guest_close(VirtIOSerialPort *port)
|
|
{
|
|
VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
|
|
|
|
if (!vcon->chr) {
|
|
return;
|
|
}
|
|
qemu_chr_fe_close(vcon->chr);
|
|
}
|
|
|
|
/* Readiness of the guest to accept data on a port */
|
|
static int chr_can_read(void *opaque)
|
|
{
|
|
VirtConsole *vcon = opaque;
|
|
|
|
return virtio_serial_guest_ready(&vcon->port);
|
|
}
|
|
|
|
/* Send data from a char device over to the guest */
|
|
static void chr_read(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
VirtConsole *vcon = opaque;
|
|
|
|
trace_virtio_console_chr_read(vcon->port.id, size);
|
|
virtio_serial_write(&vcon->port, buf, size);
|
|
}
|
|
|
|
static void chr_event(void *opaque, int event)
|
|
{
|
|
VirtConsole *vcon = opaque;
|
|
|
|
trace_virtio_console_chr_event(vcon->port.id, event);
|
|
switch (event) {
|
|
case CHR_EVENT_OPENED:
|
|
virtio_serial_open(&vcon->port);
|
|
break;
|
|
case CHR_EVENT_CLOSED:
|
|
virtio_serial_close(&vcon->port);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int virtconsole_initfn(VirtIOSerialPort *port)
|
|
{
|
|
VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
|
|
VirtIOSerialPortClass *k = VIRTIO_SERIAL_PORT_GET_CLASS(port);
|
|
|
|
if (port->id == 0 && !k->is_console) {
|
|
error_report("Port number 0 on virtio-serial devices reserved for virtconsole devices for backward compatibility.");
|
|
return -1;
|
|
}
|
|
|
|
if (vcon->chr) {
|
|
qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event,
|
|
vcon);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static Property virtconsole_properties[] = {
|
|
DEFINE_PROP_CHR("chardev", VirtConsole, chr),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void virtconsole_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
VirtIOSerialPortClass *k = VIRTIO_SERIAL_PORT_CLASS(klass);
|
|
|
|
k->is_console = true;
|
|
k->init = virtconsole_initfn;
|
|
k->have_data = flush_buf;
|
|
k->guest_open = guest_open;
|
|
k->guest_close = guest_close;
|
|
dc->props = virtconsole_properties;
|
|
}
|
|
|
|
static TypeInfo virtconsole_info = {
|
|
.name = "virtconsole",
|
|
.parent = TYPE_VIRTIO_SERIAL_PORT,
|
|
.instance_size = sizeof(VirtConsole),
|
|
.class_init = virtconsole_class_init,
|
|
};
|
|
|
|
static Property virtserialport_properties[] = {
|
|
DEFINE_PROP_CHR("chardev", VirtConsole, chr),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void virtserialport_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
VirtIOSerialPortClass *k = VIRTIO_SERIAL_PORT_CLASS(klass);
|
|
|
|
k->init = virtconsole_initfn;
|
|
k->have_data = flush_buf;
|
|
k->guest_open = guest_open;
|
|
k->guest_close = guest_close;
|
|
dc->props = virtserialport_properties;
|
|
}
|
|
|
|
static TypeInfo virtserialport_info = {
|
|
.name = "virtserialport",
|
|
.parent = TYPE_VIRTIO_SERIAL_PORT,
|
|
.instance_size = sizeof(VirtConsole),
|
|
.class_init = virtserialport_class_init,
|
|
};
|
|
|
|
static void virtconsole_register_types(void)
|
|
{
|
|
type_register_static(&virtconsole_info);
|
|
type_register_static(&virtserialport_info);
|
|
}
|
|
|
|
type_init(virtconsole_register_types)
|