/* * 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 "virtio-serial.h" typedef struct VirtConsole { VirtIOSerialPort port; CharDriverState *chr; } VirtConsole; /* Callback function that's called when the guest sends us data */ static void flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len) { VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port); qemu_chr_write(vcon->chr, buf, len); } /* 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; virtio_serial_write(&vcon->port, buf, size); } static void chr_event(void *opaque, int event) { VirtConsole *vcon = opaque; switch (event) { case CHR_EVENT_OPENED: { virtio_serial_open(&vcon->port); break; } case CHR_EVENT_CLOSED: virtio_serial_close(&vcon->port); break; } } /* 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->info = dev->info; port->is_console = true; if (vcon->chr) { qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event, vcon); port->info->have_data = flush_buf; } return 0; } static int virtconsole_exitfn(VirtIOSerialDevice *dev) { 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; } 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 void virtconsole_register(void) { virtio_serial_port_qdev_register(&virtconsole_info); } device_init(virtconsole_register) /* Generic Virtio Serial Ports */ static int virtserialport_initfn(VirtIOSerialDevice *dev) { VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev); VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port); port->info = dev->info; if (vcon->chr) { qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event, vcon); port->info->have_data = flush_buf; } return 0; } 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 void virtserialport_register(void) { virtio_serial_port_qdev_register(&virtserialport_info); } device_init(virtserialport_register)