target-mips: fix save_cpu_state() calls
[qemu.git] / hw / virtio-serial.h / virtio-console.c
1 /*
2 * Virtio Console and Generic Serial Port Devices
3 *
4 * Copyright Red Hat, Inc. 2009, 2010
5 *
6 * Authors:
7 * Amit Shah <amit.shah@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 */
12
13 #include "qemu-char.h"
14 #include "virtio-serial.h"
15
16 typedef struct VirtConsole {
17 VirtIOSerialPort port;
18 CharDriverState *chr;
19 } VirtConsole;
20
21
22 /* Callback function that's called when the guest sends us data */
23 static void flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len)
24 {
25 VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
26
27 qemu_chr_write(vcon->chr, buf, len);
28 }
29
30 /* Readiness of the guest to accept data on a port */
31 static int chr_can_read(void *opaque)
32 {
33 VirtConsole *vcon = opaque;
34
35 return virtio_serial_guest_ready(&vcon->port);
36 }
37
38 /* Send data from a char device over to the guest */
39 static void chr_read(void *opaque, const uint8_t *buf, int size)
40 {
41 VirtConsole *vcon = opaque;
42
43 virtio_serial_write(&vcon->port, buf, size);
44 }
45
46 static void chr_event(void *opaque, int event)
47 {
48 VirtConsole *vcon = opaque;
49
50 switch (event) {
51 case CHR_EVENT_OPENED: {
52 virtio_serial_open(&vcon->port);
53 break;
54 }
55 case CHR_EVENT_CLOSED:
56 virtio_serial_close(&vcon->port);
57 break;
58 }
59 }
60
61 /* Virtio Console Ports */
62 static int virtconsole_initfn(VirtIOSerialDevice *dev)
63 {
64 VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
65 VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
66
67 port->info = dev->info;
68
69 port->is_console = true;
70
71 if (vcon->chr) {
72 qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event,
73 vcon);
74 port->info->have_data = flush_buf;
75 }
76 return 0;
77 }
78
79 static int virtconsole_exitfn(VirtIOSerialDevice *dev)
80 {
81 VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
82 VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
83
84 if (vcon->chr) {
85 port->info->have_data = NULL;
86 qemu_chr_close(vcon->chr);
87 }
88
89 return 0;
90 }
91
92 static VirtIOSerialPortInfo virtconsole_info = {
93 .qdev.name = "virtconsole",
94 .qdev.size = sizeof(VirtConsole),
95 .init = virtconsole_initfn,
96 .exit = virtconsole_exitfn,
97 .qdev.props = (Property[]) {
98 DEFINE_PROP_UINT8("is_console", VirtConsole, port.is_console, 1),
99 DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID),
100 DEFINE_PROP_CHR("chardev", VirtConsole, chr),
101 DEFINE_PROP_STRING("name", VirtConsole, port.name),
102 DEFINE_PROP_END_OF_LIST(),
103 },
104 };
105
106 static void virtconsole_register(void)
107 {
108 virtio_serial_port_qdev_register(&virtconsole_info);
109 }
110 device_init(virtconsole_register)
111
112 /* Generic Virtio Serial Ports */
113 static int virtserialport_initfn(VirtIOSerialDevice *dev)
114 {
115 VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);
116 VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
117
118 port->info = dev->info;
119
120 if (vcon->chr) {
121 qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event,
122 vcon);
123 port->info->have_data = flush_buf;
124 }
125 return 0;
126 }
127
128 static VirtIOSerialPortInfo virtserialport_info = {
129 .qdev.name = "virtserialport",
130 .qdev.size = sizeof(VirtConsole),
131 .init = virtserialport_initfn,
132 .exit = virtconsole_exitfn,
133 .qdev.props = (Property[]) {
134 DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID),
135 DEFINE_PROP_CHR("chardev", VirtConsole, chr),
136 DEFINE_PROP_STRING("name", VirtConsole, port.name),
137 DEFINE_PROP_END_OF_LIST(),
138 },
139 };
140
141 static void virtserialport_register(void)
142 {
143 virtio_serial_port_qdev_register(&virtserialport_info);
144 }
145 device_init(virtserialport_register)