Fix character devices after DisplayState refactoring

The DisplayState refactoring changed the machine init function to create a
DisplayState for each VGA device instead of being passed an existing
DisplayState.  This change is critical to enable multiple graphics device
support.

Unfortunately, the serial/parallel/console code is structured today to run
before machine init to fill out the CharDriverState table which the machine
init function uses to determine whether to create the required devices.

Since a 'vc' is a type of CharDriverState, the CharDriverState code requires
that a DisplayState exist before it runs creating a circular dependency.

To fix this, this splits the creation of the initial CharDriverState from
the initialization of the text console.  We can then in a second step associate
a DisplayState with all TextConsoles.  This allows us to create the
CharDriverState's first, machine init, then associate the TextConsoles with
a DisplayState.

This code screams for more cleanup.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6352 c046a42c-6fe2-441c-8c8c-71466251a162

console.c

@@ -1285,17 +1285,17 @@ void console_color_init(DisplayState *ds)
     }
 }
 
-CharDriverState *text_console_init(DisplayState *ds, const char *p)
+static int n_text_consoles;
+static CharDriverState *text_consoles[128];
+static char *text_console_strs[128];
+
+static void text_console_do_init(CharDriverState *chr, DisplayState *ds, const char *p)
 {
-    CharDriverState *chr;
     TextConsole *s;
     unsigned width;
     unsigned height;
     static int color_inited;
 
-    chr = qemu_mallocz(sizeof(CharDriverState));
-    if (!chr)
-        return NULL;
     s = new_console(ds, (p == 0) ? TEXT_CONSOLE : TEXT_CONSOLE_FIXED_SIZE);
     if (!s) {
         free(chr);
@@ -1352,7 +1352,6 @@ CharDriverState *text_console_init(DisplayState *ds, const char *p)
     s->t_attrib_default.unvisible = 0;
     s->t_attrib_default.fgcol = COLOR_WHITE;
     s->t_attrib_default.bgcol = COLOR_BLACK;
-
     /* set current text attributes to default */
     s->t_attrib = s->t_attrib_default;
     text_console_resize(s);
@@ -1362,6 +1361,37 @@ CharDriverState *text_console_init(DisplayState *ds, const char *p)
     return chr;
 }
 
+CharDriverState *text_console_init(const char *p)
+{
+    CharDriverState *chr;
+
+    chr = qemu_mallocz(sizeof(CharDriverState));
+    if (!chr)
+        return NULL;
+
+    if (n_text_consoles == 128) {
+        fprintf(stderr, "Too many text consoles\n");
+        exit(1);
+    }
+    text_consoles[n_text_consoles] = chr;
+    text_console_strs[n_text_consoles] = p ? qemu_strdup(p) : NULL;
+    n_text_consoles++;
+
+    return chr;
+}
+
+void text_consoles_set_display(DisplayState *ds)
+{
+    int i;
+
+    for (i = 0; i < n_text_consoles; i++) {
+        text_console_do_init(text_consoles[i], ds, text_console_strs[i]);
+        qemu_free(text_console_strs[i]);
+    }
+
+    n_text_consoles = 0;
+}
+
 void qemu_console_resize(DisplayState *ds, int width, int height)
 {
     TextConsole *s = get_graphic_console();

console.h

@@ -265,7 +265,8 @@ void vga_hw_text_update(console_ch_t *chardata);
 
 int is_graphic_console(void);
 int is_fixedsize_console(void);
-CharDriverState *text_console_init(DisplayState *ds, const char *p);
+CharDriverState *text_console_init(const char *p);
+void text_consoles_set_display(DisplayState *ds);
 void console_select(unsigned int index);
 void console_color_init(DisplayState *ds);
 void qemu_console_resize(DisplayState *ds, int width, int height);

qemu-char.c

@@ -2128,10 +2128,10 @@ CharDriverState *qemu_chr_open(const char *label, const char *filename)
     CharDriverState *chr;
 
     if (!strcmp(filename, "vc")) {
-        chr = text_console_init(get_displaystate(), 0);
+        chr = text_console_init(0);
     } else
     if (strstart(filename, "vc:", &p)) {
-        chr = text_console_init(get_displaystate(), p);
+        chr = text_console_init(p);
     } else
     if (!strcmp(filename, "null")) {
         chr = qemu_chr_open_null();

vl.c

@@ -5461,6 +5461,48 @@ int main(int argc, char **argv, char **envp)
         }
     }
 
+    for(i = 0; i < MAX_SERIAL_PORTS; i++) {
+        const char *devname = serial_devices[i];
+        if (devname && strcmp(devname, "none")) {
+            char label[32];
+            snprintf(label, sizeof(label), "serial%d", i);
+            serial_hds[i] = qemu_chr_open(label, devname);
+            if (!serial_hds[i]) {
+                fprintf(stderr, "qemu: could not open serial device '%s'\n",
+                        devname);
+                exit(1);
+            }
+        }
+    }
+
+    for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
+        const char *devname = parallel_devices[i];
+        if (devname && strcmp(devname, "none")) {
+            char label[32];
+            snprintf(label, sizeof(label), "parallel%d", i);
+            parallel_hds[i] = qemu_chr_open(label, devname);
+            if (!parallel_hds[i]) {
+                fprintf(stderr, "qemu: could not open parallel device '%s'\n",
+                        devname);
+                exit(1);
+            }
+        }
+    }
+
+    for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
+        const char *devname = virtio_consoles[i];
+        if (devname && strcmp(devname, "none")) {
+            char label[32];
+            snprintf(label, sizeof(label), "virtcon%d", i);
+            virtcon_hds[i] = qemu_chr_open(label, devname);
+            if (!virtcon_hds[i]) {
+                fprintf(stderr, "qemu: could not open virtio console '%s'\n",
+                        devname);
+                exit(1);
+            }
+        }
+    }
+
     machine->init(ram_size, vga_ram_size, boot_devices,
                   kernel_filename, kernel_cmdline, initrd_filename, cpu_model);
 
@@ -5529,6 +5571,8 @@ int main(int argc, char **argv, char **envp)
         dcl = dcl->next;
     }
 
+    text_consoles_set_display(display_state);
+
     if (monitor_device) {
         monitor_hd = qemu_chr_open("monitor", monitor_device);
         if (!monitor_hd) {
@@ -5543,12 +5587,6 @@ int main(int argc, char **argv, char **envp)
         if (devname && strcmp(devname, "none")) {
             char label[32];
             snprintf(label, sizeof(label), "serial%d", i);
-            serial_hds[i] = qemu_chr_open(label, devname);
-            if (!serial_hds[i]) {
-                fprintf(stderr, "qemu: could not open serial device '%s'\n",
-                        devname);
-                exit(1);
-            }
             if (strstart(devname, "vc", 0))
                 qemu_chr_printf(serial_hds[i], "serial%d console\r\n", i);
         }
@@ -5559,12 +5597,6 @@ int main(int argc, char **argv, char **envp)
         if (devname && strcmp(devname, "none")) {
             char label[32];
             snprintf(label, sizeof(label), "parallel%d", i);
-            parallel_hds[i] = qemu_chr_open(label, devname);
-            if (!parallel_hds[i]) {
-                fprintf(stderr, "qemu: could not open parallel device '%s'\n",
-                        devname);
-                exit(1);
-            }
             if (strstart(devname, "vc", 0))
                 qemu_chr_printf(parallel_hds[i], "parallel%d console\r\n", i);
         }
@@ -5572,15 +5604,9 @@ int main(int argc, char **argv, char **envp)
 
     for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
         const char *devname = virtio_consoles[i];
-        if (devname && strcmp(devname, "none")) {
+        if (virtcon_hds[i] && devname) {
             char label[32];
             snprintf(label, sizeof(label), "virtcon%d", i);
-            virtcon_hds[i] = qemu_chr_open(label, devname);
-            if (!virtcon_hds[i]) {
-                fprintf(stderr, "qemu: could not open virtio console '%s'\n",
-                        devname);
-                exit(1);
-            }
             if (strstart(devname, "vc", 0))
                 qemu_chr_printf(virtcon_hds[i], "virtio console%d\r\n", i);
         }