linux/drivers/gpu/drm/i915/intel_gvt.c

/*
 * 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 "gem/i915_gem_dmabuf.h"
#include "gt/intel_context.h"
#include "gt/intel_ring.h"
#include "gt/shmem_utils.h"
#include <linux/vmalloc.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://github.com/intel/gvt-linux/wiki.
 */

static LIST_HEAD(intel_gvt_devices);
static const struct intel_vgpu_ops *intel_gvt_ops;
static DEFINE_MUTEX(intel_gvt_mutex);

static bool is_supported_device(struct drm_i915_private *dev_priv)
{ … }

static void free_initial_hw_state(struct drm_i915_private *dev_priv)
{ … }

static void save_mmio(struct intel_gvt_mmio_table_iter *iter, u32 offset,
		      u32 size)
{ … }

static int handle_mmio(struct intel_gvt_mmio_table_iter *iter,
		       u32 offset, u32 size)
{ … }

static int save_initial_hw_state(struct drm_i915_private *dev_priv)
{ … }

static void intel_gvt_init_device(struct drm_i915_private *dev_priv)
{ … }

static void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
{ … }

int intel_gvt_set_ops(const struct intel_vgpu_ops *ops)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

void intel_gvt_clear_ops(const struct intel_vgpu_ops *ops)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

/**
 * 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)
{ … }

/**
 * 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)
{ … }

/**
 * 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)
{ … }

/*
 * Exported here so that the exports only get created when GVT support is
 * actually enabled.
 */
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
EXPORT_SYMBOL_NS_GPL(…);
#endif
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);
EXPORT_SYMBOL_NS_GPL(…);