vmwgfx: Add functionality to get 3D caps

Since we don't allow user-space to map the fifo anymore,
add a parameter to get fifo hw version and
an ioctl to copy the 3D capabilities.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecranz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

@@ -85,6 +85,9 @@
 #define DRM_IOCTL_VMW_FENCE_WAIT				\
 	DRM_IOWR(DRM_COMMAND_BASE + DRM_VMW_FENCE_WAIT,		\
 		 struct drm_vmw_fence_wait_arg)
+#define DRM_IOCTL_VMW_GET_3D_CAP				\
+	DRM_IOW(DRM_COMMAND_BASE + DRM_VMW_GET_3D_CAP,		\
+		struct drm_vmw_get_3d_cap_arg)
 
 /**
  * The core DRM version of this macro doesn't account for
@@ -130,6 +133,8 @@ static struct drm_ioctl_desc vmw_ioctls[] = {
 		      DRM_AUTH | DRM_UNLOCKED),
 	VMW_IOCTL_DEF(VMW_FENCE_WAIT, vmw_fence_wait_ioctl,
 		      DRM_AUTH | DRM_UNLOCKED),
+	VMW_IOCTL_DEF(VMW_GET_3D_CAP, vmw_get_cap_3d_ioctl,
+		      DRM_AUTH | DRM_UNLOCKED),
 };
 
 static struct pci_device_id vmw_pci_id_list[] = {

drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

@@ -397,6 +397,8 @@ extern int vmw_user_stream_lookup(struct vmw_private *dev_priv,
 
 extern int vmw_getparam_ioctl(struct drm_device *dev, void *data,
 			      struct drm_file *file_priv);
+extern int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
+				struct drm_file *file_priv);
 
 /**
  * Fifo utilities - vmwgfx_fifo.c

drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c

@@ -54,6 +54,13 @@ int vmw_getparam_ioctl(struct drm_device *dev, void *data,
 	case DRM_VMW_PARAM_MAX_FB_SIZE:
 		param->value = dev_priv->vram_size;
 		break;
+	case DRM_VMW_PARAM_FIFO_HW_VERSION:
+	{
+		__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
+
+		param->value = ioread32(fifo_mem + SVGA_FIFO_3D_HWVERSION);
+		break;
+	}
 	default:
 		DRM_ERROR("Illegal vmwgfx get param request: %d\n",
 			  param->param);
@@ -62,3 +69,44 @@ int vmw_getparam_ioctl(struct drm_device *dev, void *data,
 
 	return 0;
 }
+
+
+int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv)
+{
+	struct drm_vmw_get_3d_cap_arg *arg =
+		(struct drm_vmw_get_3d_cap_arg *) data;
+	struct vmw_private *dev_priv = vmw_priv(dev);
+	uint32_t size;
+	__le32 __iomem *fifo_mem;
+	void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
+	void *bounce;
+	int ret;
+
+	if (unlikely(arg->pad64 != 0)) {
+		DRM_ERROR("Illegal GET_3D_CAP argument.\n");
+		return -EINVAL;
+	}
+
+	size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) << 2;
+
+	if (arg->max_size < size)
+		size = arg->max_size;
+
+	bounce = vmalloc(size);
+	if (unlikely(bounce == NULL)) {
+		DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
+		return -ENOMEM;
+	}
+
+	fifo_mem = dev_priv->mmio_virt;
+	memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
+
+	ret = copy_to_user(buffer, bounce, size);
+	vfree(bounce);
+
+	if (unlikely(ret != 0))
+		DRM_ERROR("Failed to report 3D caps info.\n");
+
+	return ret;
+}

include/drm/vmwgfx_drm.h

@@ -49,6 +49,7 @@
 #define DRM_VMW_REF_SURFACE          11
 #define DRM_VMW_EXECBUF              12
 #define DRM_VMW_FENCE_WAIT           13
+#define DRM_VMW_GET_3D_CAP           14
 
 /*************************************************************************/
 /**
@@ -68,6 +69,7 @@
 #define DRM_VMW_PARAM_HW_CAPS          3
 #define DRM_VMW_PARAM_FIFO_CAPS        4
 #define DRM_VMW_PARAM_MAX_FB_SIZE      5
+#define DRM_VMW_PARAM_FIFO_HW_VERSION  6
 
 /**
  * struct drm_vmw_getparam_arg
@@ -557,6 +559,29 @@ struct drm_vmw_stream_arg {
  * Return a single stream that was claimed by this process. Also makes
  * sure that the stream has been stopped.
  */
+/*************************************************************************/
+/**
+ * DRM_VMW_GET_3D_CAP
+ *
+ * Read 3D capabilities from the FIFO
+ *
+ */
+
+/**
+ * struct drm_vmw_get_3d_cap_arg
+ *
+ * @buffer: Pointer to a buffer for capability data, cast to an uint64_t
+ * @size: Max size to copy
+ *
+ * Input argument to the DRM_VMW_GET_3D_CAP_IOCTL
+ * ioctls.
+ */
+
+struct drm_vmw_get_3d_cap_arg {
+	uint64_t buffer;
+	uint32_t max_size;
+	uint32_t pad64;
+};
 
 /*************************************************************************/
 /**