ui: move qemu_spice_fill_device_address to ui/util.c

Other backends can use it.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

hw/display/qxl.c

@@ -2171,12 +2171,17 @@ static void qxl_realize_common(PCIQXLDevice *qxl, Error **errp)
     }
 
 #if SPICE_SERVER_VERSION >= 0x000e02 /* release 0.14.2 */
+    Error *err = NULL;
     char device_address[256] = "";
-    if (qemu_spice_fill_device_address(qxl->vga.con, device_address, 256)) {
+    if (qemu_console_fill_device_address(qxl->vga.con,
+                                         device_address, sizeof(device_address),
+                                         &err)) {
         spice_qxl_set_device_info(&qxl->ssd.qxl,
                                   device_address,
                                   0,
                                   qxl->max_outputs);
+    } else {
+        error_report_err(err);
     }
 #endif
 

include/ui/console.h

@@ -495,4 +495,10 @@ int index_from_key(const char *key, size_t key_length);
 int udmabuf_fd(void);
 #endif
 
+/* util.c */
+bool qemu_console_fill_device_address(QemuConsole *con,
+                                      char *device_address,
+                                      size_t size,
+                                      Error **errp);
+
 #endif

include/ui/spice-display.h

@@ -184,8 +184,4 @@ void qemu_spice_display_start(void);
 void qemu_spice_display_stop(void);
 int qemu_spice_display_is_running(SimpleSpiceDisplay *ssd);
 
-bool qemu_spice_fill_device_address(QemuConsole *con,
-                                    char *device_address,
-                                    size_t size);
-
 #endif

ui/meson.build

@@ -12,6 +12,7 @@ softmmu_ss.add(files(
   'kbd-state.c',
   'keymaps.c',
   'qemu-pixman.c',
+  'util.c',
 ))
 softmmu_ss.add([spice_headers, files('spice-module.c')])
 softmmu_ss.add(when: spice_protocol, if_true: files('vdagent.c'))

ui/spice-core.c

@@ -884,56 +884,6 @@ bool qemu_spice_have_display_interface(QemuConsole *con)
     return false;
 }
 
-/*
- * Recursively (in reverse order) appends addresses of PCI devices as it moves
- * up in the PCI hierarchy.
- *
- * @returns true on success, false when the buffer wasn't large enough
- */
-static bool append_pci_address(char *buf, size_t buf_size, const PCIDevice *pci)
-{
-    PCIBus *bus = pci_get_bus(pci);
-    /*
-     * equivalent to if (!pci_bus_is_root(bus)), but the function is not built
-     * with PCI_CONFIG=n, avoid using an #ifdef by checking directly
-     */
-    if (bus->parent_dev != NULL) {
-        append_pci_address(buf, buf_size, bus->parent_dev);
-    }
-
-    size_t len = strlen(buf);
-    ssize_t written = snprintf(buf + len, buf_size - len, "/%02x.%x",
-        PCI_SLOT(pci->devfn), PCI_FUNC(pci->devfn));
-
-    return written > 0 && written < buf_size - len;
-}
-
-bool qemu_spice_fill_device_address(QemuConsole *con,
-                                    char *device_address,
-                                    size_t size)
-{
-    DeviceState *dev = DEVICE(object_property_get_link(OBJECT(con),
-                                                       "device",
-                                                       &error_abort));
-    PCIDevice *pci = (PCIDevice *) object_dynamic_cast(OBJECT(dev),
-                                                       TYPE_PCI_DEVICE);
-
-    if (pci == NULL) {
-        warn_report("Setting device address of a display device to SPICE: "
-                    "Not a PCI device.");
-        return false;
-    }
-
-    strncpy(device_address, "pci/0000", size);
-    if (!append_pci_address(device_address, size, pci)) {
-        warn_report("Setting device address of a display device to SPICE: "
-            "Too many PCI devices in the chain.");
-        return false;
-    }
-
-    return true;
-}
-
 int qemu_spice_add_display_interface(QXLInstance *qxlin, QemuConsole *con)
 {
     if (g_slist_find(spice_consoles, con)) {

ui/spice-display.c

@@ -1148,12 +1148,15 @@ static void qemu_spice_display_init_one(QemuConsole *con)
     qemu_spice_add_display_interface(&ssd->qxl, con);
 
 #if SPICE_SERVER_VERSION >= 0x000e02 /* release 0.14.2 */
+    Error *err = NULL;
     char device_address[256] = "";
-    if (qemu_spice_fill_device_address(con, device_address, 256)) {
+    if (qemu_console_fill_device_address(con, device_address, 256, &err)) {
         spice_qxl_set_device_info(&ssd->qxl,
                                   device_address,
                                   qemu_console_get_head(con),
                                   1);
+    } else {
+        error_report_err(err);
     }
 #endif
 

ui/util.c

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2021 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+
+#include "hw/pci/pci.h"
+#include "hw/pci/pci_bus.h"
+#include "qapi/error.h"
+#include "ui/console.h"
+
+/*
+ * Recursively (in reverse order) appends addresses of PCI devices as it moves
+ * up in the PCI hierarchy.
+ *
+ * @returns true on success, false when the buffer wasn't large enough
+ */
+static bool append_pci_address(char *buf, size_t buf_size, const PCIDevice *pci)
+{
+    PCIBus *bus = pci_get_bus(pci);
+    /*
+     * equivalent to if (!pci_bus_is_root(bus)), but the function is not built
+     * with PCI_CONFIG=n, avoid using an #ifdef by checking directly
+     */
+    if (bus->parent_dev != NULL) {
+        append_pci_address(buf, buf_size, bus->parent_dev);
+    }
+
+    size_t len = strlen(buf);
+    ssize_t written = snprintf(buf + len, buf_size - len, "/%02x.%x",
+        PCI_SLOT(pci->devfn), PCI_FUNC(pci->devfn));
+
+    return written > 0 && written < buf_size - len;
+}
+
+bool qemu_console_fill_device_address(QemuConsole *con,
+                                      char *device_address,
+                                      size_t size,
+                                      Error **errp)
+{
+    ERRP_GUARD();
+    DeviceState *dev = DEVICE(object_property_get_link(OBJECT(con),
+                                                       "device",
+                                                       &error_abort));
+    PCIDevice *pci = (PCIDevice *) object_dynamic_cast(OBJECT(dev),
+                                                       TYPE_PCI_DEVICE);
+
+    if (pci == NULL) {
+        error_setg(errp, "Setting device address of a display device: "
+                   "Not a PCI device.");
+        return false;
+    }
+
+    strncpy(device_address, "pci/0000", size);
+    if (!append_pci_address(device_address, size, pci)) {
+        error_setg(errp, "Setting device address of a display device: "
+                   "Too many PCI devices in the chain.");
+        return false;
+    }
+
+    return true;
+}