From: Jagannathan Raman <jag.ra...@oracle.com>
Associate the file descriptor for a PCIDevice in remote process with
DeviceState object.
Signed-off-by: Elena Ufimtseva <elena.ufimts...@oracle.com>
Signed-off-by: John G Johnson <john.g.john...@oracle.com>
Signed-off-by: Jagannathan Raman <jag.ra...@oracle.com>
---
MAINTAINERS | 2 +
hw/i386/meson.build | 1 +
hw/i386/remote-obj.c | 140 +++++++++++++++++++++++++++++++++++
include/hw/i386/remote-obj.h | 42 +++++++++++
4 files changed, 185 insertions(+)
create mode 100644 hw/i386/remote-obj.c
create mode 100644 include/hw/i386/remote-obj.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 9885c9499f..ac8eefaa3f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3048,6 +3048,8 @@ F: include/hw/i386/remote.h
F: io/mpqemu-link.c
F: include/io/mpqemu-link.h
F: hw/i386/remote-msg.c
+F: include/hw/i386/remote-obj.h
+F: hw/i386/remote-obj.c
Build and test automation
-------------------------
diff --git a/hw/i386/meson.build b/hw/i386/meson.build
index 238ae0879d..7b35f35d86 100644
--- a/hw/i386/meson.build
+++ b/hw/i386/meson.build
@@ -25,6 +25,7 @@ i386_ss.add(when: 'CONFIG_PC', if_true: files(
'port92.c'))
i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote.c'))
i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote-msg.c'))
+i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote-obj.c'))
subdir('kvm')
subdir('xen')
diff --git a/hw/i386/remote-obj.c b/hw/i386/remote-obj.c
new file mode 100644
index 0000000000..a88f78d6ef
--- /dev/null
+++ b/hw/i386/remote-obj.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright © 2020 Oracle and/or its affiliates.
+ *
+ * This work is licensed under the terms of the GNU GPL-v2, version 2 or later.
+ *
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+
+#include "hw/i386/remote-obj.h"
+#include "qemu/error-report.h"
+#include "qom/object_interfaces.h"
+#include "hw/qdev-core.h"
+#include "io/channel.h"
+#include "hw/qdev-core.h"
+#include "hw/i386/remote.h"
+#include "io/channel-util.h"
+#include "qapi/error.h"
+#include "sysemu/sysemu.h"
+#include "hw/pci/pci.h"
+
+static void remote_object_set_fd(Object *obj, const char *str, Error **errp)
+{
+ RemoteObject *o = REMOTE_OBJECT(obj);
+
+ o->fd = atoi(str);
+}
+
+static void remote_object_set_devid(Object *obj, const char *str, Error **errp)
+{
+ RemoteObject *o = REMOTE_OBJECT(obj);
+
+ g_free(o->devid);
+
+ o->devid = g_strdup(str);
+}
+
+static void property_release_remote_object(Object *obj, const char *name,
+ void *opaque)
+{
+ Object *remote_object = OBJECT(opaque);
+
+ object_unref(remote_object);
+}
+
+static void remote_object_machine_done(Notifier *notifier, void *data)
+{
+ RemoteObject *o = container_of(notifier, RemoteObject, machine_done);
+ DeviceState *dev = NULL;
+ QIOChannel *ioc = NULL;
+ Error *err = NULL;
+
+ dev = qdev_find_recursive(sysbus_get_default(), o->devid);
+ if (!dev || !object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
+ error_report("%s is not a PCI device", o->devid);
+ return;
+ }
+
+ ioc = qio_channel_new_fd(o->fd, &err);
+ if (!ioc) {
+ error_report_err(err);
+ return;
+ }
+ qio_channel_set_blocking(ioc, false, NULL);
+
+ object_property_add(OBJECT(dev), "remote-object", "object", NULL, NULL,
+ property_release_remote_object, (void *)OBJECT(o));
+
+ qio_channel_add_watch(ioc, G_IO_IN | G_IO_HUP | G_IO_ERR,
+ mpqemu_process_msg, (void *)PCI_DEVICE(dev), NULL);
+}
+
+static void remote_object_init(Object *obj)
+{
+ RemoteObjectClass *k = REMOTE_OBJECT_GET_CLASS(obj);
+ RemoteObject *o = REMOTE_OBJECT(obj);
+
+ if (k->nr_devs >= k->max_devs) {
+ error_report("Reached maximum number of devices: %u", k->max_devs);
+ return;
+ }
+
+ o->ioc = NULL;
+ o->fd = -1;
+ o->devid = NULL;
+
+ k->nr_devs++;
+
+ object_property_add_str(obj, "fd", NULL, remote_object_set_fd);
+ object_property_set_description(obj, "fd",
+ "file descriptor for the object");
+ object_property_add_str(obj, "devid", NULL, remote_object_set_devid);
+ object_property_set_description(obj, "devid",
+ "id of device to associate");
+
+ o->machine_done.notify = remote_object_machine_done;
+ qemu_add_machine_init_done_notifier(&o->machine_done);
+}
+
+static void remote_object_finalize(Object *obj)
+{
+ RemoteObjectClass *k = REMOTE_OBJECT_GET_CLASS(obj);
+ RemoteObject *o = REMOTE_OBJECT(obj);
+
+ qio_channel_close(o->ioc, NULL);
+ k->nr_devs--;
+ g_free(o->devid);
+}
+
+static void remote_object_class_init(ObjectClass *klass, void *data)
+{
+ RemoteObjectClass *k = REMOTE_OBJECT_CLASS(klass);
+
+ k->max_devs = 1;
+ k->nr_devs = 0;
+}
+
+static const TypeInfo remote_object_info = {
+ .name = TYPE_REMOTE_OBJECT,
+ .parent = TYPE_OBJECT,
+ .instance_size = sizeof(RemoteObject),
+ .instance_init = remote_object_init,
+ .instance_finalize = remote_object_finalize,
+ .class_size = sizeof(RemoteObjectClass),
+ .class_init = remote_object_class_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_USER_CREATABLE },
+ { }
+ }
+};
+
+static void register_types(void)
+{
+ type_register_static(&remote_object_info);
+}
+
+type_init(register_types);
diff --git a/include/hw/i386/remote-obj.h b/include/hw/i386/remote-obj.h
new file mode 100644
index 0000000000..8513c2bb84
--- /dev/null
+++ b/include/hw/i386/remote-obj.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright © 2020 Oracle and/or its affiliates.
+ *
+ * This work is licensed under the terms of the GNU GPL-v2, version 2 or later.
+ *
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef REMOTE_OBJECT_H
+#define REMOTE_OBJECT_H
+
+#include "io/channel.h"
+#include "qemu/notify.h"
+
+#define TYPE_REMOTE_OBJECT "remote-object"
+#define REMOTE_OBJECT(obj) \
+ OBJECT_CHECK(RemoteObject, (obj), TYPE_REMOTE_OBJECT)
+#define REMOTE_OBJECT_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(RemoteObjectClass, (obj), TYPE_REMOTE_OBJECT)
+#define REMOTE_OBJECT_CLASS(klass) \
+ OBJECT_CLASS_CHECK(RemoteObjectClass, (klass), TYPE_REMOTE_OBJECT)
+
+typedef struct {
+ ObjectClass parent_class;
+
+ unsigned int nr_devs;
+ unsigned int max_devs;
+} RemoteObjectClass;
+
+typedef struct {
+ /* private */
+ Object parent;
+
+ Notifier machine_done;
+
+ int fd;
+ char *devid;
+ QIOChannel *ioc;
+} RemoteObject;
+
+#endif
--
2.25.GIT
