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4c36a2ffac
This file was renamed to ease the reviews of the recent changes that went in. Now that the changes are done, rename the file back to its original name. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
/*
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* Virtio Console and Generic Serial Port Devices
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*
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* Copyright Red Hat, Inc. 2009
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*
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* Authors:
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* Amit Shah <amit.shah@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*/
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#include "qemu-char.h"
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#include "virtio-serial.h"
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typedef struct VirtConsole {
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VirtIOSerialPort port;
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CharDriverState *chr;
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} VirtConsole;
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/* Callback function that's called when the guest sends us data */
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static size_t flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len)
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{
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VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
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ssize_t ret;
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ret = qemu_chr_write(vcon->chr, buf, len);
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return ret < 0 ? 0 : ret;
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}
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/* Readiness of the guest to accept data on a port */
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static int chr_can_read(void *opaque)
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{
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VirtConsole *vcon = opaque;
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return virtio_serial_guest_ready(&vcon->port);
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}
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/* Send data from a char device over to the guest */
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static void chr_read(void *opaque, const uint8_t *buf, int size)
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{
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VirtConsole *vcon = opaque;
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virtio_serial_write(&vcon->port, buf, size);
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}
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static void chr_event(void *opaque, int event)
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{
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VirtConsole *vcon = opaque;
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switch (event) {
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case CHR_EVENT_OPENED: {
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virtio_serial_open(&vcon->port);
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break;
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}
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case CHR_EVENT_CLOSED:
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virtio_serial_close(&vcon->port);
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break;
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}
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}
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/* Virtio Console Ports */
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static int virtconsole_initfn(VirtIOSerialDevice *dev)
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{
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VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
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VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
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port->info = dev->info;
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port->is_console = true;
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if (vcon->chr) {
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qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event,
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vcon);
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port->info->have_data = flush_buf;
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}
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return 0;
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}
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static int virtconsole_exitfn(VirtIOSerialDevice *dev)
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{
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VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
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VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
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if (vcon->chr) {
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port->info->have_data = NULL;
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qemu_chr_close(vcon->chr);
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}
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return 0;
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}
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static VirtIOSerialPortInfo virtconsole_info = {
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.qdev.name = "virtconsole",
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.qdev.size = sizeof(VirtConsole),
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.init = virtconsole_initfn,
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.exit = virtconsole_exitfn,
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.qdev.props = (Property[]) {
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DEFINE_PROP_UINT8("is_console", VirtConsole, port.is_console, 1),
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DEFINE_PROP_CHR("chardev", VirtConsole, chr),
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DEFINE_PROP_STRING("name", VirtConsole, port.name),
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DEFINE_PROP_END_OF_LIST(),
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},
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};
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static void virtconsole_register(void)
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{
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virtio_serial_port_qdev_register(&virtconsole_info);
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}
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device_init(virtconsole_register)
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/* Generic Virtio Serial Ports */
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static int virtserialport_initfn(VirtIOSerialDevice *dev)
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{
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VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
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VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
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port->info = dev->info;
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if (vcon->chr) {
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qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event,
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vcon);
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port->info->have_data = flush_buf;
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}
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return 0;
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}
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static VirtIOSerialPortInfo virtserialport_info = {
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.qdev.name = "virtserialport",
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.qdev.size = sizeof(VirtConsole),
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.init = virtserialport_initfn,
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.exit = virtconsole_exitfn,
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.qdev.props = (Property[]) {
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DEFINE_PROP_CHR("chardev", VirtConsole, chr),
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DEFINE_PROP_STRING("name", VirtConsole, port.name),
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DEFINE_PROP_END_OF_LIST(),
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},
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};
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static void virtserialport_register(void)
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{
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virtio_serial_port_qdev_register(&virtserialport_info);
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}
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device_init(virtserialport_register)
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