chardev: add vc support to qapi

This patch adds 'vc' support to qapi and also switches over the
vc chardev initialization to the new qapi code path.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

include/ui/console.h

@@ -450,9 +450,9 @@ void qemu_console_resize(DisplayState *ds, int width, int height);
 void qemu_console_copy(DisplayState *ds, int src_x, int src_y,
                        int dst_x, int dst_y, int w, int h);
 
-typedef CharDriverState *(VcHandler)(QemuOpts *);
+typedef CharDriverState *(VcHandler)(ChardevVC *vc);
 
-CharDriverState *vc_init(QemuOpts *opts);
+CharDriverState *vc_init(ChardevVC *vc);
 void register_vc_handler(VcHandler *handler);
 
 /* sdl.c */

qapi-schema.json

@@ -3230,6 +3230,23 @@
 ##
 { 'type': 'ChardevSpicePort', 'data': { 'fqdn'  : 'str' } }
 
+##
+# @ChardevVC:
+#
+# Configuration info for virtual console chardevs.
+#
+# @width:  console width,  in pixels
+# @height: console height, in pixels
+# @cols:   console width,  in chars
+# @rows:   console height, in chars
+#
+# Since: 1.5
+##
+{ 'type': 'ChardevVC', 'data': { '*width'  : 'int',
+                                 '*height' : 'int',
+                                 '*cols'   : 'int',
+                                 '*rows'   : 'int' } }
+
 ##
 # @ChardevBackend:
 #
@@ -3252,7 +3269,8 @@
                                        'stdio'  : 'ChardevStdio',
                                        'console': 'ChardevDummy',
                                        'spicevmc' : 'ChardevSpiceChannel',
-                                       'spiceport' : 'ChardevSpicePort' } }
+                                       'spiceport' : 'ChardevSpicePort',
+                                       'vc'     : 'ChardevVC' } }
 
 ##
 # @ChardevReturn:

qemu-char.c

@@ -3737,6 +3737,9 @@ ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
         chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
         break;
 #endif
+    case CHARDEV_BACKEND_KIND_VC:
+        chr = vc_init(backend->vc);
+        break;
     default:
         error_setg(errp, "unknown chardev backend (%d)", backend->kind);
         break;

ui/console.c

@@ -1537,22 +1537,26 @@ static void text_console_do_init(CharDriverState *chr, DisplayState *ds)
         chr->init(chr);
 }
 
-static CharDriverState *text_console_init(QemuOpts *opts)
+static CharDriverState *text_console_init(ChardevVC *vc)
 {
     CharDriverState *chr;
     QemuConsole *s;
-    unsigned width;
-    unsigned height;
+    unsigned width = 0;
+    unsigned height = 0;
 
     chr = g_malloc0(sizeof(CharDriverState));
 
-    width = qemu_opt_get_number(opts, "width", 0);
-    if (width == 0)
-        width = qemu_opt_get_number(opts, "cols", 0) * FONT_WIDTH;
+    if (vc->has_width) {
+        width = vc->width;
+    } else if (vc->has_cols) {
+        width = vc->cols * FONT_WIDTH;
+    }
 
-    height = qemu_opt_get_number(opts, "height", 0);
-    if (height == 0)
-        height = qemu_opt_get_number(opts, "rows", 0) * FONT_HEIGHT;
+    if (vc->has_height) {
+        height = vc->height;
+    } else if (vc->has_rows) {
+        height = vc->rows * FONT_HEIGHT;
+    }
 
     if (width == 0 || height == 0) {
         s = new_console(NULL, TEXT_CONSOLE);
@@ -1575,9 +1579,9 @@ static CharDriverState *text_console_init(QemuOpts *opts)
 
 static VcHandler *vc_handler = text_console_init;
 
-CharDriverState *vc_init(QemuOpts *opts)
+CharDriverState *vc_init(ChardevVC *vc)
 {
-    return vc_handler(opts);
+    return vc_handler(vc);
 }
 
 void register_vc_handler(VcHandler *handler)
@@ -1740,9 +1744,42 @@ PixelFormat qemu_default_pixelformat(int bpp)
     return pf;
 }
 
+static void qemu_chr_parse_vc(QemuOpts *opts, ChardevBackend *backend,
+                              Error **errp)
+{
+    int val;
+
+    backend->vc = g_new0(ChardevVC, 1);
+
+    val = qemu_opt_get_number(opts, "width", 0);
+    if (val != 0) {
+        backend->vc->has_width = true;
+        backend->vc->width = val;
+    }
+
+    val = qemu_opt_get_number(opts, "height", 0);
+    if (val != 0) {
+        backend->vc->has_height = true;
+        backend->vc->height = val;
+    }
+
+    val = qemu_opt_get_number(opts, "cols", 0);
+    if (val != 0) {
+        backend->vc->has_cols = true;
+        backend->vc->cols = val;
+    }
+
+    val = qemu_opt_get_number(opts, "rows", 0);
+    if (val != 0) {
+        backend->vc->has_rows = true;
+        backend->vc->rows = val;
+    }
+}
+
 static void register_types(void)
 {
-    register_char_driver("vc", text_console_init);
+    register_char_driver_qapi("vc", CHARDEV_BACKEND_KIND_VC,
+                              qemu_chr_parse_vc);
 }
 
 type_init(register_types);

ui/gtk.c

@@ -991,7 +991,7 @@ static int gd_vc_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 static int nb_vcs;
 static CharDriverState *vcs[MAX_VCS];
 
-static CharDriverState *gd_vc_handler(QemuOpts *opts)
+static CharDriverState *gd_vc_handler(ChardevVC *unused)
 {
     CharDriverState *chr;