*/
#include "qemu-char.h"
+#include "qemu/error-report.h"
+#include "trace.h"
#include "virtio-serial.h"
typedef struct VirtConsole {
static ssize_t flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len)
{
VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
+ ssize_t ret;
- return qemu_chr_write(vcon->chr, buf, len);
+ 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 */
{
VirtConsole *vcon = opaque;
+ trace_virtio_console_chr_read(vcon->port.id, size);
virtio_serial_write(&vcon->port, buf, size);
}
{
VirtConsole *vcon = opaque;
+ trace_virtio_console_chr_event(vcon->port.id, event);
switch (event) {
case CHR_EVENT_OPENED:
virtio_serial_open(&vcon->port);
}
}
-static int generic_port_init(VirtConsole *vcon, VirtIOSerialDevice *dev)
+static int virtconsole_initfn(VirtIOSerialPort *port)
{
- vcon->port.info = dev->info;
+ 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);
- vcon->port.info->have_data = flush_buf;
}
+
return 0;
}
-/* Virtio Console Ports */
-static int virtconsole_initfn(VirtIOSerialDevice *dev)
-{
- VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
- VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
-
- port->is_console = true;
- return generic_port_init(vcon, dev);
-}
+static Property virtconsole_properties[] = {
+ DEFINE_PROP_CHR("chardev", VirtConsole, chr),
+ DEFINE_PROP_END_OF_LIST(),
+};
-static int virtconsole_exitfn(VirtIOSerialDevice *dev)
+static void virtconsole_class_init(ObjectClass *klass, void *data)
{
- VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
- VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
-
- if (vcon->chr) {
- port->info->have_data = NULL;
- qemu_chr_close(vcon->chr);
- }
-
- return 0;
+ 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 VirtIOSerialPortInfo virtconsole_info = {
- .qdev.name = "virtconsole",
- .qdev.size = sizeof(VirtConsole),
- .init = virtconsole_initfn,
- .exit = virtconsole_exitfn,
- .qdev.props = (Property[]) {
- DEFINE_PROP_UINT8("is_console", VirtConsole, port.is_console, 1),
- DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID),
- DEFINE_PROP_CHR("chardev", VirtConsole, chr),
- DEFINE_PROP_STRING("name", VirtConsole, port.name),
- DEFINE_PROP_END_OF_LIST(),
- },
+static TypeInfo virtconsole_info = {
+ .name = "virtconsole",
+ .parent = TYPE_VIRTIO_SERIAL_PORT,
+ .instance_size = sizeof(VirtConsole),
+ .class_init = virtconsole_class_init,
};
-static void virtconsole_register(void)
-{
- virtio_serial_port_qdev_register(&virtconsole_info);
-}
-device_init(virtconsole_register)
+static Property virtserialport_properties[] = {
+ DEFINE_PROP_CHR("chardev", VirtConsole, chr),
+ DEFINE_PROP_END_OF_LIST(),
+};
-/* Generic Virtio Serial Ports */
-static int virtserialport_initfn(VirtIOSerialDevice *dev)
+static void virtserialport_class_init(ObjectClass *klass, void *data)
{
- VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
- VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
-
- return generic_port_init(vcon, dev);
+ 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 VirtIOSerialPortInfo virtserialport_info = {
- .qdev.name = "virtserialport",
- .qdev.size = sizeof(VirtConsole),
- .init = virtserialport_initfn,
- .exit = virtconsole_exitfn,
- .qdev.props = (Property[]) {
- DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID),
- DEFINE_PROP_CHR("chardev", VirtConsole, chr),
- DEFINE_PROP_STRING("name", VirtConsole, port.name),
- DEFINE_PROP_END_OF_LIST(),
- },
+static TypeInfo virtserialport_info = {
+ .name = "virtserialport",
+ .parent = TYPE_VIRTIO_SERIAL_PORT,
+ .instance_size = sizeof(VirtConsole),
+ .class_init = virtserialport_class_init,
};
-static void virtserialport_register(void)
+static void virtconsole_register_types(void)
{
- virtio_serial_port_qdev_register(&virtserialport_info);
+ type_register_static(&virtconsole_info);
+ type_register_static(&virtserialport_info);
}
-device_init(virtserialport_register)
+
+type_init(virtconsole_register_types)
projects / qemu.git / blobdiff