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path: root/drivers/gpu/drm/i915/intel_gvt.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_gvt.c')
-rw-r--r--drivers/gpu/drm/i915/intel_gvt.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_gvt.c b/drivers/gpu/drm/i915/intel_gvt.c
new file mode 100644
index 000000000000..434f4d5c553d
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_gvt.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright(c) 2011-2016 Intel Corporation. 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 AUTHORS OR COPYRIGHT HOLDERS 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 "i915_drv.h"
+#include "intel_gvt.h"
+
+/**
+ * DOC: Intel GVT-g host support
+ *
+ * Intel GVT-g is a graphics virtualization technology which shares the
+ * GPU among multiple virtual machines on a time-sharing basis. Each
+ * virtual machine is presented a virtual GPU (vGPU), which has equivalent
+ * features as the underlying physical GPU (pGPU), so i915 driver can run
+ * seamlessly in a virtual machine. This file provides the englightments
+ * of GVT and the necessary components used by GVT in i915 driver.
+ */
+
+static bool is_supported_device(struct drm_i915_private *dev_priv)
+{
+ if (IS_BROADWELL(dev_priv))
+ return true;
+ return false;
+}
+
+/**
+ * intel_gvt_init - initialize GVT components
+ * @dev_priv: drm i915 private data
+ *
+ * This function is called at the initialization stage to create a GVT device.
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ *
+ */
+int intel_gvt_init(struct drm_i915_private *dev_priv)
+{
+ int ret;
+
+ if (!i915.enable_gvt) {
+ DRM_DEBUG_DRIVER("GVT-g is disabled by kernel params\n");
+ return 0;
+ }
+
+ if (!is_supported_device(dev_priv)) {
+ DRM_DEBUG_DRIVER("Unsupported device. GVT-g is disabled\n");
+ goto bail;
+ }
+
+ /*
+ * We're not in host or fail to find a MPT module, disable GVT-g
+ */
+ ret = intel_gvt_init_host();
+ if (ret) {
+ DRM_DEBUG_DRIVER("Not in host or MPT modules not found\n");
+ goto bail;
+ }
+
+ ret = intel_gvt_init_device(dev_priv);
+ if (ret) {
+ DRM_DEBUG_DRIVER("Fail to init GVT device\n");
+ goto bail;
+ }
+
+ return 0;
+
+bail:
+ i915.enable_gvt = 0;
+ return 0;
+}
+
+/**
+ * intel_gvt_cleanup - cleanup GVT components when i915 driver is unloading
+ * @dev_priv: drm i915 private *
+ *
+ * This function is called at the i915 driver unloading stage, to shutdown
+ * GVT components and release the related resources.
+ */
+void intel_gvt_cleanup(struct drm_i915_private *dev_priv)
+{
+ if (!intel_gvt_active(dev_priv))
+ return;
+
+ intel_gvt_clean_device(dev_priv);
+}