Infrastructure for display support. Adds a new vfio-pci-display device,
which will export a display and is not hotpluggable.
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
hw/vfio/pci.h | 3 +++
hw/vfio/display.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
hw/vfio/pci.c | 30 ++++++++++++++++++++++++++++++
hw/vfio/Makefile.objs | 2 +-
4 files changed, 81 insertions(+), 1 deletion(-)
create mode 100644 hw/vfio/display.c
diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index f4aa13e021..fe2a7aeb4c 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -133,6 +133,7 @@ typedef struct VFIOPCIDevice {
#define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2
#define VFIO_FEATURE_ENABLE_IGD_OPREGION \
(1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT)
+ bool display;
int32_t bootindex;
uint32_t igd_gms;
OffAutoPCIBAR msix_relo;
@@ -174,4 +175,6 @@ int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev,
struct vfio_region_info *info,
Error **errp);
+int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp);
+
#endif /* HW_VFIO_VFIO_PCI_H */
diff --git a/hw/vfio/display.c b/hw/vfio/display.c
new file mode 100644
index 0000000000..d9b4d07f20
--- /dev/null
+++ b/hw/vfio/display.c
@@ -0,0 +1,47 @@
+/*
+ * display support for mdev based vgpu devices
+ *
+ * Copyright Red Hat, Inc. 2017
+ *
+ * Authors:
+ * Gerd Hoffmann
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include <linux/vfio.h>
+#include <sys/ioctl.h>
+
+#include "sysemu/sysemu.h"
+#include "ui/console.h"
+#include "qapi/error.h"
+#include "pci.h"
+
+int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp)
+{
+ struct vfio_device_gfx_plane_info probe;
+ int ret;
+
+ memset(&probe, 0, sizeof(probe));
+ probe.argsz = sizeof(probe);
+ probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_DMABUF;
+ ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
+ if (ret == 0) {
+ error_setg(errp, "vfio-display: dmabuf support not implemented yet");
+ return -1;
+ }
+
+ memset(&probe, 0, sizeof(probe));
+ probe.argsz = sizeof(probe);
+ probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_REGION;
+ ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
+ if (ret == 0) {
+ error_setg(errp, "vfio-display: region support not implemented yet");
+ return -1;
+ }
+
+ error_setg(errp, "vfio: device doesn't support any (known) display
method");
+ return -1;
+}
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 033cc8dea1..d9d668a12b 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3015,6 +3015,13 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
}
}
+ if (vdev->display) {
+ ret = vfio_display_probe(vdev, errp);
+ if (ret) {
+ goto out_teardown;
+ }
+ }
+
vfio_register_err_notifier(vdev);
vfio_register_req_notifier(vdev);
vfio_setup_resetfn_quirk(vdev);
@@ -3120,6 +3127,13 @@ static void vfio_instance_init(Object *obj)
pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
}
+static void vfio_display_instance_init(Object *obj)
+{
+ VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, PCI_DEVICE(obj));
+
+ vdev->display = true;
+}
+
static Property vfio_pci_dev_properties[] = {
DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIOPCIDevice, host),
DEFINE_PROP_STRING("sysfsdev", VFIOPCIDevice, vbasedev.sysfsdev),
@@ -3178,6 +3192,13 @@ static void vfio_pci_dev_class_init(ObjectClass *klass,
void *data)
pdc->config_write = vfio_pci_write_config;
}
+static void vfio_pci_display_dev_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->hotpluggable = false;
+}
+
static const TypeInfo vfio_pci_dev_info = {
.name = "vfio-pci",
.parent = TYPE_PCI_DEVICE,
@@ -3192,9 +3213,18 @@ static const TypeInfo vfio_pci_dev_info = {
},
};
+static const TypeInfo vfio_pci_display_dev_info = {
+ .name = "vfio-pci-display",
+ .parent = "vfio-pci",
+ .instance_size = sizeof(VFIOPCIDevice),
+ .class_init = vfio_pci_display_dev_class_init,
+ .instance_init = vfio_display_instance_init,
+};
+
static void register_vfio_pci_dev_type(void)
{
type_register_static(&vfio_pci_dev_info);
+ type_register_static(&vfio_pci_display_dev_info);
}
type_init(register_vfio_pci_dev_type)
diff --git a/hw/vfio/Makefile.objs b/hw/vfio/Makefile.objs
index c3ab9097f1..a2e7a0a7cf 100644
--- a/hw/vfio/Makefile.objs
+++ b/hw/vfio/Makefile.objs
@@ -1,6 +1,6 @@
ifeq ($(CONFIG_LINUX), y)
obj-$(CONFIG_SOFTMMU) += common.o
-obj-$(CONFIG_PCI) += pci.o pci-quirks.o
+obj-$(CONFIG_PCI) += pci.o pci-quirks.o display.o
obj-$(CONFIG_VFIO_CCW) += ccw.o
obj-$(CONFIG_SOFTMMU) += platform.o
obj-$(CONFIG_VFIO_XGMAC) += calxeda-xgmac.o
--
2.9.3
