Merge branch 'virtio-gpu-drm-next' of git://git.kraxel.org/linux into…

… drm-next

Yay, thanks to Gerd for pull this together.

* 'virtio-gpu-drm-next' of git://git.kraxel.org/linux:
  Add MAINTAINERS entry for virtio-gpu.
  Add virtio gpu driver.
  drm_vblank_get: don't WARN_ON in case vblanks are not initialized
  break kconfig dependency loop

MAINTAINERS

@@ -10571,6 +10571,15 @@ F:	drivers/block/virtio_blk.c
 F:	include/linux/virtio_*.h
 F:	include/uapi/linux/virtio_*.h
 
+VIRTIO GPU DRIVER
+M:	David Airlie <airlied@linux.ie>
+M:	Gerd Hoffmann <kraxel@redhat.com>
+L:	dri-devel@lists.freedesktop.org
+L:	virtualization@lists.linux-foundation.org
+S:	Maintained
+F:	drivers/gpu/drm/virtio/
+F:	include/uapi/linux/virtio_gpu.h
+
 VIRTIO HOST (VHOST)
 M:	"Michael S. Tsirkin" <mst@redhat.com>
 L:	kvm@vger.kernel.org

drivers/gpu/drm/Kconfig

@@ -206,6 +206,8 @@ source "drivers/gpu/drm/qxl/Kconfig"
 
 source "drivers/gpu/drm/bochs/Kconfig"
 
+source "drivers/gpu/drm/virtio/Kconfig"
+
 source "drivers/gpu/drm/msm/Kconfig"
 
 source "drivers/gpu/drm/tegra/Kconfig"

drivers/gpu/drm/Makefile

@@ -61,6 +61,7 @@ obj-$(CONFIG_DRM_OMAP)	+= omapdrm/
 obj-y			+= tilcdc/
 obj-$(CONFIG_DRM_QXL) += qxl/
 obj-$(CONFIG_DRM_BOCHS) += bochs/
+obj-$(CONFIG_DRM_VIRTIO_GPU) += virtio/
 obj-$(CONFIG_DRM_MSM) += msm/
 obj-$(CONFIG_DRM_TEGRA) += tegra/
 obj-$(CONFIG_DRM_STI) += sti/

drivers/gpu/drm/drm_irq.c

@@ -1056,6 +1056,9 @@ int drm_vblank_get(struct drm_device *dev, int crtc)
 	unsigned long irqflags;
 	int ret = 0;
 
+	if (!dev->num_crtcs)
+		return -EINVAL;
+
 	if (WARN_ON(crtc >= dev->num_crtcs))
 		return -EINVAL;
 

drivers/gpu/drm/virtio/Kconfig

@@ -0,0 +1,14 @@
+config DRM_VIRTIO_GPU
+	tristate "Virtio GPU driver"
+	depends on DRM && VIRTIO
+	select FB_SYS_FILLRECT
+	select FB_SYS_COPYAREA
+	select FB_SYS_IMAGEBLIT
+        select DRM_KMS_HELPER
+        select DRM_KMS_FB_HELPER
+        select DRM_TTM
+	help
+	   This is the virtual GPU driver for virtio.  It can be used with
+           QEMU based VMMs (like KVM or Xen).
+
+	   If unsure say M.

drivers/gpu/drm/virtio/Makefile

@@ -0,0 +1,11 @@
+#
+# Makefile for the drm device driver.  This driver provides support for the
+# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
+
+ccflags-y := -Iinclude/drm
+
+virtio-gpu-y := virtgpu_drv.o virtgpu_kms.o virtgpu_drm_bus.o virtgpu_gem.o \
+	virtgpu_fb.o virtgpu_display.o virtgpu_vq.o virtgpu_ttm.o \
+	virtgpu_fence.o virtgpu_object.o virtgpu_debugfs.o virtgpu_plane.o
+
+obj-$(CONFIG_DRM_VIRTIO_GPU) += virtio-gpu.o

drivers/gpu/drm/virtio/virtgpu_debugfs.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/debugfs.h>
+
+#include "drmP.h"
+#include "virtgpu_drv.h"
+
+static int
+virtio_gpu_debugfs_irq_info(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct virtio_gpu_device *vgdev = node->minor->dev->dev_private;
+
+	seq_printf(m, "fence %ld %lld\n",
+		   atomic64_read(&vgdev->fence_drv.last_seq),
+		   vgdev->fence_drv.sync_seq);
+	return 0;
+}
+
+static struct drm_info_list virtio_gpu_debugfs_list[] = {
+	{ "irq_fence", virtio_gpu_debugfs_irq_info, 0, NULL },
+};
+
+#define VIRTIO_GPU_DEBUGFS_ENTRIES ARRAY_SIZE(virtio_gpu_debugfs_list)
+
+int
+virtio_gpu_debugfs_init(struct drm_minor *minor)
+{
+	drm_debugfs_create_files(virtio_gpu_debugfs_list,
+				 VIRTIO_GPU_DEBUGFS_ENTRIES,
+				 minor->debugfs_root, minor);
+	return 0;
+}
+
+void
+virtio_gpu_debugfs_takedown(struct drm_minor *minor)
+{
+	drm_debugfs_remove_files(virtio_gpu_debugfs_list,
+				 VIRTIO_GPU_DEBUGFS_ENTRIES,
+				 minor);
+}