diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_gvt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_gvt.c | 164 |
1 files changed, 164 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 000000000..4e70c1a9e --- /dev/null +++ b/drivers/gpu/drm/i915/intel_gvt.c @@ -0,0 +1,164 @@ +/* + * 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 "i915_vgpu.h" +#include "intel_gvt.h" +#include "gvt/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. + * + * To virtualize GPU resources GVT-g driver depends on hypervisor technology + * e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability + * and be virtualized within GVT-g device module. More architectural design + * doc is available on https://01.org/group/2230/documentation-list. + */ + +static bool is_supported_device(struct drm_i915_private *dev_priv) +{ + if (IS_BROADWELL(dev_priv)) + return true; + if (IS_SKYLAKE(dev_priv)) + return true; + if (IS_KABYLAKE(dev_priv)) + return true; + if (IS_BROXTON(dev_priv)) + return true; + if (IS_COFFEELAKE(dev_priv)) + return true; + if (IS_COMETLAKE(dev_priv)) + return true; + + return false; +} + +/** + * intel_gvt_sanitize_options - sanitize GVT related options + * @dev_priv: drm i915 private data + * + * This function is called at the i915 options sanitize stage. + */ +void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv) +{ + if (!dev_priv->params.enable_gvt) + return; + + if (intel_vgpu_active(dev_priv)) { + drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n"); + goto bail; + } + + if (!is_supported_device(dev_priv)) { + drm_info(&dev_priv->drm, + "Unsupported device. GVT-g is disabled\n"); + goto bail; + } + + return; +bail: + dev_priv->params.enable_gvt = 0; +} + +/** + * 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_inject_probe_failure(dev_priv)) + return -ENODEV; + + if (!dev_priv->params.enable_gvt) { + drm_dbg(&dev_priv->drm, + "GVT-g is disabled by kernel params\n"); + return 0; + } + + if (intel_uc_wants_guc_submission(&dev_priv->gt.uc)) { + drm_err(&dev_priv->drm, + "i915 GVT-g loading failed due to Graphics virtualization is not yet supported with GuC submission\n"); + return -EIO; + } + + ret = intel_gvt_init_device(dev_priv); + if (ret) { + drm_dbg(&dev_priv->drm, "Fail to init GVT device\n"); + goto bail; + } + + return 0; + +bail: + dev_priv->params.enable_gvt = 0; + return 0; +} + +static inline bool intel_gvt_active(struct drm_i915_private *dev_priv) +{ + return dev_priv->gvt; +} + +/** + * intel_gvt_driver_remove - cleanup GVT components when i915 driver is + * unbinding + * @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_driver_remove(struct drm_i915_private *dev_priv) +{ + if (!intel_gvt_active(dev_priv)) + return; + + intel_gvt_clean_device(dev_priv); +} + +/** + * intel_gvt_resume - GVT resume routine wapper + * + * @dev_priv: drm i915 private * + * + * This function is called at the i915 driver resume stage to restore required + * HW status for GVT so that vGPU can continue running after resumed. + */ +void intel_gvt_resume(struct drm_i915_private *dev_priv) +{ + if (intel_gvt_active(dev_priv)) + intel_gvt_pm_resume(dev_priv->gvt); +} |