linux/drivers/gpu/drm/i915/gvt/opregion.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 <linux/acpi.h>
#include "i915_drv.h"
#include "gvt.h"

/*
 * Note: Only for GVT-g virtual VBT generation, other usage must
 * not do like this.
 */
#define _INTEL_BIOS_PRIVATE
#include "display/intel_vbt_defs.h"

#define OPREGION_SIGNATURE …
#define MBOX_VBT …

/* device handle */
#define DEVICE_TYPE_CRT …
#define DEVICE_TYPE_EFP1 …
#define DEVICE_TYPE_EFP2 …
#define DEVICE_TYPE_EFP3 …
#define DEVICE_TYPE_EFP4 …

struct opregion_header { … } __packed;

struct bdb_data_header { … } __packed;

/* For supporting windows guest with opregion, here hardcode the emulated
 * bdb header version as '186', and the corresponding child_device_config
 * length should be '33' but not '38'.
 */
struct efp_child_device_config { … } __packed;

struct vbt { … };

static void virt_vbt_generation(struct vbt *v)
{ … }

/**
 * intel_vgpu_init_opregion - initialize the stuff used to emulate opregion
 * @vgpu: a vGPU
 *
 * Returns:
 * Zero on success, negative error code if failed.
 */
int intel_vgpu_init_opregion(struct intel_vgpu *vgpu)
{ … }

/**
 * intel_vgpu_opregion_base_write_handler - Opregion base register write handler
 *
 * @vgpu: a vGPU
 * @gpa: guest physical address of opregion
 *
 * Returns:
 * Zero on success, negative error code if failed.
 */
int intel_vgpu_opregion_base_write_handler(struct intel_vgpu *vgpu, u32 gpa)
{ … }

/**
 * intel_vgpu_clean_opregion - clean the stuff used to emulate opregion
 * @vgpu: a vGPU
 *
 */
void intel_vgpu_clean_opregion(struct intel_vgpu *vgpu)
{ … }


#define GVT_OPREGION_FUNC(scic) …

#define GVT_OPREGION_SUBFUNC(scic) …

static const char *opregion_func_name(u32 func)
{ … }

static const char *opregion_subfunc_name(u32 subfunc)
{
	const char *name = NULL;

	switch (subfunc) {
	case 0:
		name = "Supported Calls";
		break;

	case 1:
		name = "Requested Callbacks";
		break;

	case 2 ... 3:
	case 8 ... 9:
		name = "Reserved";
		break;

	case 5:
		name = "Boot Display";
		break;

	case 6:
		name = "TV-Standard/Video-Connector";
		break;

	case 7:
		name = "Internal Graphics";
		break;

	case 10:
		name = "Spread Spectrum Clocks";
		break;

	case 11:
		name = "Get AKSV";
		break;

	default:
		name = "Unknown";
		break;
	}
	return name;
};

static bool querying_capabilities(u32 scic)
{ … }

/**
 * intel_vgpu_emulate_opregion_request - emulating OpRegion request
 * @vgpu: a vGPU
 * @swsci: SWSCI request
 *
 * Returns:
 * Zero on success, negative error code if failed
 */
int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci)
{ … }