Amit Shah | 98b1925 | 2010-01-20 00:36:52 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Virtio Console and Generic Serial Port Devices |
| 3 | * |
Amit Shah | 71c092e | 2010-04-27 18:04:02 +0530 | [diff] [blame] | 4 | * Copyright Red Hat, Inc. 2009, 2010 |
Amit Shah | 98b1925 | 2010-01-20 00:36:52 +0530 | [diff] [blame] | 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 */ |
Amit Shah | 1e4476a | 2010-04-27 18:04:09 +0530 | [diff] [blame] | 23 | static void flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len) |
Amit Shah | 98b1925 | 2010-01-20 00:36:52 +0530 | [diff] [blame] | 24 | { |
| 25 | VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port); |
Amit Shah | 98b1925 | 2010-01-20 00:36:52 +0530 | [diff] [blame] | 26 | |
Amit Shah | 1e4476a | 2010-04-27 18:04:09 +0530 | [diff] [blame] | 27 | qemu_chr_write(vcon->chr, buf, len); |
Amit Shah | 98b1925 | 2010-01-20 00:36:52 +0530 | [diff] [blame] | 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), |
Amit Shah | 055b889 | 2010-04-27 18:03:59 +0530 | [diff] [blame] | 99 | DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID), |
Amit Shah | 98b1925 | 2010-01-20 00:36:52 +0530 | [diff] [blame] | 100 | DEFINE_PROP_CHR("chardev", VirtConsole, chr), |
Amit Shah | 160600f | 2010-01-20 00:36:54 +0530 | [diff] [blame] | 101 | DEFINE_PROP_STRING("name", VirtConsole, port.name), |
Amit Shah | 98b1925 | 2010-01-20 00:36:52 +0530 | [diff] [blame] | 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) |
Amit Shah | b60c470 | 2010-01-20 00:36:56 +0530 | [diff] [blame] | 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[]) { |
Amit Shah | 055b889 | 2010-04-27 18:03:59 +0530 | [diff] [blame] | 134 | DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID), |
Amit Shah | b60c470 | 2010-01-20 00:36:56 +0530 | [diff] [blame] | 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) |