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/* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-

 */

/*

 *

 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.

 * 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, sub license, 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 NON-INFRINGEMENT.

 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 

#include 

#include 

#include "i915_drv.h"

#include "i915_trace.h"

#include "intel_drv.h"

#include 

#include 

#include 

#include 

#include 

#include 

#define __read_mostly

int init_display_kms(struct drm_device *dev);

static int i915_modeset __read_mostly = 1;

module_param_named(modeset, i915_modeset, int, 0400);

MODULE_PARM_DESC(modeset,

		"Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "

		"1=on, -1=force vga console preference [default])");

unsigned int i915_fbpercrtc __always_unused = 0;

module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);

int i915_panel_ignore_lid __read_mostly         =  1;

module_param_named(panel_ignore_lid, i915_panel_ignore_lid, int, 0600);

MODULE_PARM_DESC(panel_ignore_lid,

		"Override lid status (0=autodetect, 1=autodetect disabled [default], "

		"-1=force lid closed, -2=force lid open)");

unsigned int i915_powersave __read_mostly = 0;

module_param_named(powersave, i915_powersave, int, 0600);

MODULE_PARM_DESC(powersave,

		"Enable powersavings, fbc, downclocking, etc. (default: true)");

int i915_semaphores __read_mostly = -1;

module_param_named(semaphores, i915_semaphores, int, 0600);

MODULE_PARM_DESC(semaphores,

		"Use semaphores for inter-ring sync (default: -1 (use per-chip defaults))");

int i915_enable_rc6 __read_mostly = 0;

module_param_named(i915_enable_rc6, i915_enable_rc6, int, 0400);

MODULE_PARM_DESC(i915_enable_rc6,

		"Enable power-saving render C-state 6. "

		"Different stages can be selected via bitmask values "

		"(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "

		"For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "

		"default: -1 (use per-chip default)");

int i915_enable_fbc __read_mostly = 0;

module_param_named(i915_enable_fbc, i915_enable_fbc, int, 0600);

MODULE_PARM_DESC(i915_enable_fbc,

		"Enable frame buffer compression for power savings "

		"(default: -1 (use per-chip default))");

unsigned int i915_lvds_downclock  __read_mostly =  0;

module_param_named(lvds_downclock, i915_lvds_downclock, int, 0400);

MODULE_PARM_DESC(lvds_downclock,

		"Use panel (LVDS/eDP) downclocking for power savings "

		"(default: false)");

int i915_lvds_channel_mode __read_mostly;

module_param_named(lvds_channel_mode, i915_lvds_channel_mode, int, 0600);

MODULE_PARM_DESC(lvds_channel_mode,

		 "Specify LVDS channel mode "

		 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");

int i915_panel_use_ssc __read_mostly = -1;

module_param_named(lvds_use_ssc, i915_panel_use_ssc, int, 0600);

MODULE_PARM_DESC(lvds_use_ssc,

		"Use Spread Spectrum Clock with panels [LVDS/eDP] "

		"(default: auto from VBT)");

int i915_vbt_sdvo_panel_type __read_mostly      = -1;

module_param_named(vbt_sdvo_panel_type, i915_vbt_sdvo_panel_type, int, 0600);

MODULE_PARM_DESC(vbt_sdvo_panel_type,

		"Override/Ignore selection of SDVO panel mode in the VBT "

		"(-2=ignore, -1=auto [default], index in VBT BIOS table)");

static bool i915_try_reset __read_mostly = true;

module_param_named(reset, i915_try_reset, bool, 0600);

MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");

bool i915_enable_hangcheck __read_mostly = false;

module_param_named(enable_hangcheck, i915_enable_hangcheck, bool, 0644);

MODULE_PARM_DESC(enable_hangcheck,

		"Periodically check GPU activity for detecting hangs. "

		"WARNING: Disabling this can cause system wide hangs. "

		"(default: true)");

int i915_enable_ppgtt __read_mostly = 0;

module_param_named(i915_enable_ppgtt, i915_enable_ppgtt, int, 0600);

MODULE_PARM_DESC(i915_enable_ppgtt,

		"Enable PPGTT (default: true)");

int i915_enable_psr __read_mostly = 0;

module_param_named(enable_psr, i915_enable_psr, int, 0600);

MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");

unsigned int i915_preliminary_hw_support __read_mostly = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT);

module_param_named(preliminary_hw_support, i915_preliminary_hw_support, int, 0600);

MODULE_PARM_DESC(preliminary_hw_support,

		"Enable preliminary hardware support.");

int i915_disable_power_well __read_mostly = 1;

module_param_named(disable_power_well, i915_disable_power_well, int, 0600);

MODULE_PARM_DESC(disable_power_well,

		 "Disable the power well when possible (default: true)");

int i915_enable_ips __read_mostly = 1;

module_param_named(enable_ips, i915_enable_ips, int, 0600);

MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");

bool i915_fastboot __read_mostly = 0;

module_param_named(fastboot, i915_fastboot, bool, 0600);

MODULE_PARM_DESC(fastboot, "Try to skip unnecessary mode sets at boot time "

		 "(default: false)");

int i915_enable_pc8 __read_mostly = 0;

module_param_named(enable_pc8, i915_enable_pc8, int, 0600);

MODULE_PARM_DESC(enable_pc8, "Enable support for low power package C states (PC8+) (default: true)");

int i915_pc8_timeout __read_mostly = 5000;

module_param_named(pc8_timeout, i915_pc8_timeout, int, 0600);

MODULE_PARM_DESC(pc8_timeout, "Number of msecs of idleness required to enter PC8+ (default: 5000)");

bool i915_prefault_disable __read_mostly;

module_param_named(prefault_disable, i915_prefault_disable, bool, 0600);

MODULE_PARM_DESC(prefault_disable,

		"Disable page prefaulting for pread/pwrite/reloc (default:false). For developers only.");

static struct drm_driver driver;

extern int intel_agp_enabled;

#define PCI_VENDOR_ID_INTEL        0x8086

static const struct intel_device_info intel_i915g_info = {

	.gen = 3, .is_i915g = 1, .cursor_needs_physical = 1, .num_pipes = 2,

	.has_overlay = 1, .overlay_needs_physical = 1,

};

static const struct intel_device_info intel_i915gm_info = {

	.gen = 3, .is_mobile = 1, .num_pipes = 2,

	.cursor_needs_physical = 1,

	.has_overlay = 1, .overlay_needs_physical = 1,

	.supports_tv = 1,

};

static const struct intel_device_info intel_i945g_info = {

	.gen = 3, .has_hotplug = 1, .cursor_needs_physical = 1, .num_pipes = 2,

	.has_overlay = 1, .overlay_needs_physical = 1,

};

static const struct intel_device_info intel_i945gm_info = {

	.gen = 3, .is_i945gm = 1, .is_mobile = 1, .num_pipes = 2,

	.has_hotplug = 1, .cursor_needs_physical = 1,

	.has_overlay = 1, .overlay_needs_physical = 1,

	.supports_tv = 1,

};

static const struct intel_device_info intel_i965g_info = {

	.gen = 4, .is_broadwater = 1, .num_pipes = 2,

	.has_hotplug = 1,

	.has_overlay = 1,

};

static const struct intel_device_info intel_i965gm_info = {

	.gen = 4, .is_crestline = 1, .num_pipes = 2,

	.is_mobile = 1, .has_fbc = 1, .has_hotplug = 1,

	.has_overlay = 1,

	.supports_tv = 1,

};

static const struct intel_device_info intel_g33_info = {

	.gen = 3, .is_g33 = 1, .num_pipes = 2,

	.need_gfx_hws = 1, .has_hotplug = 1,

	.has_overlay = 1,

};

static const struct intel_device_info intel_g45_info = {

	.gen = 4, .is_g4x = 1, .need_gfx_hws = 1, .num_pipes = 2,

	.has_pipe_cxsr = 1, .has_hotplug = 1,

	.has_bsd_ring = 1,

};

static const struct intel_device_info intel_gm45_info = {

	.gen = 4, .is_g4x = 1, .num_pipes = 2,

	.is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1,

	.has_pipe_cxsr = 1, .has_hotplug = 1,

	.supports_tv = 1,

	.has_bsd_ring = 1,

};

static const struct intel_device_info intel_pineview_info = {

	.gen = 3, .is_g33 = 1, .is_pineview = 1, .is_mobile = 1, .num_pipes = 2,

	.need_gfx_hws = 1, .has_hotplug = 1,

	.has_overlay = 1,

};

static const struct intel_device_info intel_ironlake_d_info = {

	.gen = 5, .num_pipes = 2,

	.need_gfx_hws = 1, .has_hotplug = 1,

	.has_bsd_ring = 1,

};

static const struct intel_device_info intel_ironlake_m_info = {

	.gen = 5, .is_mobile = 1, .num_pipes = 2,

	.need_gfx_hws = 1, .has_hotplug = 1,

	.has_fbc = 1,

	.has_bsd_ring = 1,

};

static const struct intel_device_info intel_sandybridge_d_info = {

	.gen = 6, .num_pipes = 2,

	.need_gfx_hws = 1, .has_hotplug = 1,

    .has_bsd_ring = 1,

    .has_blt_ring = 1,

	.has_llc = 1,

	.has_force_wake = 1,

};

static const struct intel_device_info intel_sandybridge_m_info = {

	.gen = 6, .is_mobile = 1, .num_pipes = 2,

	.need_gfx_hws = 1, .has_hotplug = 1,

    .has_fbc      = 1,

    .has_bsd_ring = 1,

    .has_blt_ring = 1,

	.has_llc = 1,

	.has_force_wake = 1,

};

#define GEN7_FEATURES  \

	.gen = 7, .num_pipes = 3, \

	.need_gfx_hws = 1, .has_hotplug = 1, \

	.has_bsd_ring = 1, \

	.has_blt_ring = 1, \

	.has_llc = 1, \

	.has_force_wake = 1

static const struct intel_device_info intel_ivybridge_d_info = {

	GEN7_FEATURES,

	.is_ivybridge = 1,

};

static const struct intel_device_info intel_ivybridge_m_info = {

	GEN7_FEATURES,

	.is_ivybridge = 1,

	.is_mobile = 1,

	.has_fbc = 1,

};

static const struct intel_device_info intel_ivybridge_q_info = {

	GEN7_FEATURES,

	.is_ivybridge = 1,

	.num_pipes = 0, /* legal, last one wins */

};

static const struct intel_device_info intel_valleyview_m_info = {

	GEN7_FEATURES,

	.is_mobile = 1,

	.num_pipes = 2,

	.is_valleyview = 1,

	.display_mmio_offset = VLV_DISPLAY_BASE,

	.has_llc = 0, /* legal, last one wins */

};

static const struct intel_device_info intel_valleyview_d_info = {

	GEN7_FEATURES,

	.num_pipes = 2,

	.is_valleyview = 1,

	.display_mmio_offset = VLV_DISPLAY_BASE,

	.has_llc = 0, /* legal, last one wins */

};

static const struct intel_device_info intel_haswell_d_info = {

	GEN7_FEATURES,

	.is_haswell = 1,

	.has_ddi = 1,

	.has_fpga_dbg = 1,

	.has_vebox_ring = 1,

};

static const struct intel_device_info intel_haswell_m_info = {

	GEN7_FEATURES,

	.is_haswell = 1,

	.is_mobile = 1,

	.has_ddi = 1,

	.has_fpga_dbg = 1,

	.has_fbc = 1,

	.has_vebox_ring = 1,

};

/*

 * Make sure any device matches here are from most specific to most

 * general.  For example, since the Quanta match is based on the subsystem

 * and subvendor IDs, we need it to come before the more general IVB

 * PCI ID matches, otherwise we'll use the wrong info struct above.

 */

#define INTEL_PCI_IDS \

	INTEL_I915G_IDS(&intel_i915g_info),	\

	INTEL_I915GM_IDS(&intel_i915gm_info),	\

	INTEL_I945G_IDS(&intel_i945g_info),	\

	INTEL_I945GM_IDS(&intel_i945gm_info),	\

	INTEL_I965G_IDS(&intel_i965g_info),	\

	INTEL_G33_IDS(&intel_g33_info),		\

	INTEL_I965GM_IDS(&intel_i965gm_info),	\

	INTEL_GM45_IDS(&intel_gm45_info), 	\

	INTEL_G45_IDS(&intel_g45_info), 	\

	INTEL_PINEVIEW_IDS(&intel_pineview_info),	\

	INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info),	\

	INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info),	\

	INTEL_SNB_D_IDS(&intel_sandybridge_d_info),	\

	INTEL_SNB_M_IDS(&intel_sandybridge_m_info),	\

	INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ \

	INTEL_IVB_M_IDS(&intel_ivybridge_m_info),	\

	INTEL_IVB_D_IDS(&intel_ivybridge_d_info),	\

	INTEL_HSW_D_IDS(&intel_haswell_d_info), \

	INTEL_HSW_M_IDS(&intel_haswell_m_info), \

	INTEL_VLV_M_IDS(&intel_valleyview_m_info),	\

	INTEL_VLV_D_IDS(&intel_valleyview_d_info)

static const struct pci_device_id pciidlist[] = {       /* aka */

	INTEL_PCI_IDS,

    {0, 0, 0}

};

#define INTEL_PCH_DEVICE_ID_MASK        0xff00

#define INTEL_PCH_IBX_DEVICE_ID_TYPE    0x3b00

#define INTEL_PCH_CPT_DEVICE_ID_TYPE    0x1c00

#define INTEL_PCH_PPT_DEVICE_ID_TYPE    0x1e00

#define INTEL_PCH_LPT_DEVICE_ID_TYPE	0x8c00

void intel_detect_pch(struct drm_device *dev)

{

    struct drm_i915_private *dev_priv = dev->dev_private;

    struct pci_dev *pch;

	/* In all current cases, num_pipes is equivalent to the PCH_NOP setting

	 * (which really amounts to a PCH but no South Display).

	 */

	if (INTEL_INFO(dev)->num_pipes == 0) {

		dev_priv->pch_type = PCH_NOP;

		return;

	}

    /*

     * The reason to probe ISA bridge instead of Dev31:Fun0 is to

     * make graphics device passthrough work easy for VMM, that only

     * need to expose ISA bridge to let driver know the real hardware

     * underneath. This is a requirement from virtualization team.

	 *

	 * In some virtualized environments (e.g. XEN), there is irrelevant

	 * ISA bridge in the system. To work reliably, we should scan trhough

	 * all the ISA bridge devices and check for the first match, instead

	 * of only checking the first one.

     */

    pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);

	while (pch) {

		struct pci_dev *curr = pch;

        if (pch->vendor == PCI_VENDOR_ID_INTEL) {

			unsigned short id;

            id = pch->device & INTEL_PCH_DEVICE_ID_MASK;

			dev_priv->pch_id = id;

            if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {

                dev_priv->pch_type = PCH_IBX;

                DRM_DEBUG_KMS("Found Ibex Peak PCH\n");

				WARN_ON(!IS_GEN5(dev));

            } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {

                dev_priv->pch_type = PCH_CPT;

                DRM_DEBUG_KMS("Found CougarPoint PCH\n");

				WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));

            } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {

                /* PantherPoint is CPT compatible */

                dev_priv->pch_type = PCH_CPT;

                DRM_DEBUG_KMS("Found PatherPoint PCH\n");

				WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));

			} else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {

				dev_priv->pch_type = PCH_LPT;

				DRM_DEBUG_KMS("Found LynxPoint PCH\n");

				WARN_ON(!IS_HASWELL(dev));

				WARN_ON(IS_ULT(dev));

			} else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {

				dev_priv->pch_type = PCH_LPT;

				DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");

				WARN_ON(!IS_HASWELL(dev));

				WARN_ON(!IS_ULT(dev));

			} else {

				goto check_next;

            }

			break;

        }

check_next:

		pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, curr);

//       pci_dev_put(curr);

    }

	if (!pch)

		DRM_DEBUG_KMS("No PCH found?\n");

}

bool i915_semaphore_is_enabled(struct drm_device *dev)

{

	if (INTEL_INFO(dev)->gen < 6)

		return 0;

	if (i915_semaphores >= 0)

		return i915_semaphores;

#ifdef CONFIG_INTEL_IOMMU

	/* Enable semaphores on SNB when IO remapping is off */

	if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped)

		return false;

#endif

	return 1;

}

#if 0

static int i915_drm_freeze(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct drm_crtc *crtc;

	/* ignore lid events during suspend */

	mutex_lock(&dev_priv->modeset_restore_lock);

	dev_priv->modeset_restore = MODESET_SUSPENDED;

	mutex_unlock(&dev_priv->modeset_restore_lock);

	/* We do a lot of poking in a lot of registers, make sure they work

	 * properly. */

	hsw_disable_package_c8(dev_priv);

	intel_set_power_well(dev, true);

	drm_kms_helper_poll_disable(dev);

	pci_save_state(dev->pdev);

	/* If KMS is active, we do the leavevt stuff here */

	if (drm_core_check_feature(dev, DRIVER_MODESET)) {

		int error;

		mutex_lock(&dev->struct_mutex);

		error = i915_gem_idle(dev);

		mutex_unlock(&dev->struct_mutex);

		if (error) {

			dev_err(&dev->pdev->dev,

				"GEM idle failed, resume might fail\n");

			return error;

		}

		cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);

		drm_irq_uninstall(dev);

		dev_priv->enable_hotplug_processing = false;

		/*

		 * Disable CRTCs directly since we want to preserve sw state

		 * for _thaw.

		 */

		list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)

			dev_priv->display.crtc_disable(crtc);

		intel_modeset_suspend_hw(dev);

	}

	i915_save_state(dev);

	intel_opregion_fini(dev);

	console_lock();

	intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED);

	console_unlock();

	return 0;

}

int i915_suspend(struct drm_device *dev, pm_message_t state)

{

	int error;

	if (!dev || !dev->dev_private) {

		DRM_ERROR("dev: %p\n", dev);

		DRM_ERROR("DRM not initialized, aborting suspend.\n");

		return -ENODEV;

	}

	if (state.event == PM_EVENT_PRETHAW)

		return 0;

	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)

		return 0;

	error = i915_drm_freeze(dev);

	if (error)

		return error;

	if (state.event == PM_EVENT_SUSPEND) {

		/* Shut down the device */

		pci_disable_device(dev->pdev);

		pci_set_power_state(dev->pdev, PCI_D3hot);

	}

	return 0;

}

void intel_console_resume(struct work_struct *work)

{

	struct drm_i915_private *dev_priv =

		container_of(work, struct drm_i915_private,

			     console_resume_work);

	struct drm_device *dev = dev_priv->dev;

	console_lock();

	intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);

	console_unlock();

}

static void intel_resume_hotplug(struct drm_device *dev)

{

	struct drm_mode_config *mode_config = &dev->mode_config;

	struct intel_encoder *encoder;

	mutex_lock(&mode_config->mutex);

	DRM_DEBUG_KMS("running encoder hotplug functions\n");

	list_for_each_entry(encoder, &mode_config->encoder_list, base.head)

		if (encoder->hot_plug)

			encoder->hot_plug(encoder);

	mutex_unlock(&mode_config->mutex);

	/* Just fire off a uevent and let userspace tell us what to do */

	drm_helper_hpd_irq_event(dev);

}

static int __i915_drm_thaw(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = dev->dev_private;

	int error = 0;

	i915_restore_state(dev);

	intel_opregion_setup(dev);

	/* KMS EnterVT equivalent */

	if (drm_core_check_feature(dev, DRIVER_MODESET)) {

		intel_init_pch_refclk(dev);

		mutex_lock(&dev->struct_mutex);

		error = i915_gem_init_hw(dev);

		mutex_unlock(&dev->struct_mutex);

		/* We need working interrupts for modeset enabling ... */

		drm_irq_install(dev);

		intel_modeset_init_hw(dev);

		drm_modeset_lock_all(dev);

		intel_modeset_setup_hw_state(dev, true);

		drm_modeset_unlock_all(dev);

		/*

		 * ... but also need to make sure that hotplug processing

		 * doesn't cause havoc. Like in the driver load code we don't

		 * bother with the tiny race here where we might loose hotplug

		 * notifications.

		 * */

		intel_hpd_init(dev);

		dev_priv->enable_hotplug_processing = true;

		/* Config may have changed between suspend and resume */

		intel_resume_hotplug(dev);

	}

	intel_opregion_init(dev);

	/*

	 * The console lock can be pretty contented on resume due

	 * to all the printk activity.  Try to keep it out of the hot

	 * path of resume if possible.

	 */

	if (console_trylock()) {

		intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);

		console_unlock();

	} else {

		schedule_work(&dev_priv->console_resume_work);

	}

	/* Undo what we did at i915_drm_freeze so the refcount goes back to the

	 * expected level. */

	hsw_enable_package_c8(dev_priv);

	mutex_lock(&dev_priv->modeset_restore_lock);

	dev_priv->modeset_restore = MODESET_DONE;

	mutex_unlock(&dev_priv->modeset_restore_lock);

	return error;

}

static int i915_drm_thaw(struct drm_device *dev)

{

	int error = 0;

	intel_uncore_sanitize(dev);

	if (drm_core_check_feature(dev, DRIVER_MODESET)) {

		mutex_lock(&dev->struct_mutex);

		i915_gem_restore_gtt_mappings(dev);

		mutex_unlock(&dev->struct_mutex);

	} else if (drm_core_check_feature(dev, DRIVER_MODESET))

		i915_check_and_clear_faults(dev);

	__i915_drm_thaw(dev);

	return error;

}

int i915_resume(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = dev->dev_private;

	int ret;

	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)

		return 0;

	if (pci_enable_device(dev->pdev))

		return -EIO;

	pci_set_master(dev->pdev);

	intel_uncore_sanitize(dev);

	/*

	 * Platforms with opregion should have sane BIOS, older ones (gen3 and

	 * earlier) need this since the BIOS might clear all our scratch PTEs.

	 */

	if (drm_core_check_feature(dev, DRIVER_MODESET) &&

	    !dev_priv->opregion.header) {

		mutex_lock(&dev->struct_mutex);

		i915_gem_restore_gtt_mappings(dev);

		mutex_unlock(&dev->struct_mutex);

	}

	ret = __i915_drm_thaw(dev);

	if (ret)

		return ret;

	drm_kms_helper_poll_enable(dev);

	return 0;

}

/**

 * i915_reset - reset chip after a hang

 * @dev: drm device to reset

 *

 * Reset the chip.  Useful if a hang is detected. Returns zero on successful

 * reset or otherwise an error code.

 *

 * Procedure is fairly simple:

 *   - reset the chip using the reset reg

 *   - re-init context state

 *   - re-init hardware status page

 *   - re-init ring buffer

 *   - re-init interrupt state

 *   - re-init display

 */

int i915_reset(struct drm_device *dev)

{

	drm_i915_private_t *dev_priv = dev->dev_private;

	bool simulated;

	int ret;

	if (!i915_try_reset)

		return 0;

	mutex_lock(&dev->struct_mutex);

	i915_gem_reset(dev);

	simulated = dev_priv->gpu_error.stop_rings != 0;

	if (!simulated && get_seconds() - dev_priv->gpu_error.last_reset < 5) {

		DRM_ERROR("GPU hanging too fast, declaring wedged!\n");

		ret = -ENODEV;

	} else {

		ret = intel_gpu_reset(dev);

		/* Also reset the gpu hangman. */

		if (simulated) {

			DRM_INFO("Simulated gpu hang, resetting stop_rings\n");

			dev_priv->gpu_error.stop_rings = 0;

			if (ret == -ENODEV) {

				DRM_ERROR("Reset not implemented, but ignoring "

					  "error for simulated gpu hangs\n");

				ret = 0;

			}

		} else

			dev_priv->gpu_error.last_reset = get_seconds();

	}

	if (ret) {

		DRM_ERROR("Failed to reset chip.\n");

		mutex_unlock(&dev->struct_mutex);

		return ret;

	}

	/* Ok, now get things going again... */

	/*

	 * Everything depends on having the GTT running, so we need to start

	 * there.  Fortunately we don't need to do this unless we reset the

	 * chip at a PCI level.

	 *

	 * Next we need to restore the context, but we don't use those

	 * yet either...

	 *

	 * Ring buffer needs to be re-initialized in the KMS case, or if X

	 * was running at the time of the reset (i.e. we weren't VT

	 * switched away).

	 */

	if (drm_core_check_feature(dev, DRIVER_MODESET) ||

			!dev_priv->ums.mm_suspended) {

		struct intel_ring_buffer *ring;

		int i;

		dev_priv->ums.mm_suspended = 0;

		i915_gem_init_swizzling(dev);

		for_each_ring(ring, dev_priv, i)

			ring->init(ring);

		i915_gem_context_init(dev);

		if (dev_priv->mm.aliasing_ppgtt) {

			ret = dev_priv->mm.aliasing_ppgtt->enable(dev);

			if (ret)

				i915_gem_cleanup_aliasing_ppgtt(dev);

		}

		/*

		 * It would make sense to re-init all the other hw state, at

		 * least the rps/rc6/emon init done within modeset_init_hw. For

		 * some unknown reason, this blows up my ilk, so don't.

		 */

		mutex_unlock(&dev->struct_mutex);

		drm_irq_uninstall(dev);

		drm_irq_install(dev);

		intel_hpd_init(dev);

	} else {

		mutex_unlock(&dev->struct_mutex);

	}

	return 0;

}

static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

{

	struct intel_device_info *intel_info =

		(struct intel_device_info *) ent->driver_data;

	/* Only bind to function 0 of the device. Early generations

	 * used function 1 as a placeholder for multi-head. This causes

	 * us confusion instead, especially on the systems where both

	 * functions have the same PCI-ID!

	 */

	if (PCI_FUNC(pdev->devfn))

		return -ENODEV;

	/* We've managed to ship a kms-enabled ddx that shipped with an XvMC

	 * implementation for gen3 (and only gen3) that used legacy drm maps

	 * (gasp!) to share buffers between X and the client. Hence we need to

	 * keep around the fake agp stuff for gen3, even when kms is enabled. */

	if (intel_info->gen != 3) {

		driver.driver_features &=

			~(DRIVER_USE_AGP | DRIVER_REQUIRE_AGP);

	} else if (!intel_agp_enabled) {

		DRM_ERROR("drm/i915 can't work without intel_agp module!\n");

		return -ENODEV;

	}

	return drm_get_pci_dev(pdev, ent, &driver);

}

static void

i915_pci_remove(struct pci_dev *pdev)

{

	struct drm_device *dev = pci_get_drvdata(pdev);

	drm_put_dev(dev);

}

static int i915_pm_suspend(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct drm_device *drm_dev = pci_get_drvdata(pdev);

	int error;

	if (!drm_dev || !drm_dev->dev_private) {

		dev_err(dev, "DRM not initialized, aborting suspend.\n");

		return -ENODEV;

	}

	if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)

		return 0;

	error = i915_drm_freeze(drm_dev);

	if (error)

		return error;

	pci_disable_device(pdev);

	pci_set_power_state(pdev, PCI_D3hot);

	return 0;

}

static int i915_pm_resume(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct drm_device *drm_dev = pci_get_drvdata(pdev);

	return i915_resume(drm_dev);

}

static int i915_pm_freeze(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct drm_device *drm_dev = pci_get_drvdata(pdev);

	if (!drm_dev || !drm_dev->dev_private) {

		dev_err(dev, "DRM not initialized, aborting suspend.\n");

		return -ENODEV;

	}

	return i915_drm_freeze(drm_dev);

}

static int i915_pm_thaw(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct drm_device *drm_dev = pci_get_drvdata(pdev);

	return i915_drm_thaw(drm_dev);

}

static int i915_pm_poweroff(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct drm_device *drm_dev = pci_get_drvdata(pdev);

	return i915_drm_freeze(drm_dev);

}

#endif

static struct drm_driver driver = {

    /* Don't use MTRRs here; the Xserver or userspace app should

     * deal with them for Intel hardware.

     */

    .driver_features =

	    DRIVER_USE_AGP | DRIVER_REQUIRE_AGP |

	    DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |

	    DRIVER_RENDER,

    .load = i915_driver_load,

//    .unload = i915_driver_unload,

      .open = i915_driver_open,

//    .lastclose = i915_driver_lastclose,

//    .preclose = i915_driver_preclose,

//    .postclose = i915_driver_postclose,

    /* Used in place of i915_pm_ops for non-DRIVER_MODESET */

//    .suspend = i915_suspend,

//    .resume = i915_resume,

//    .device_is_agp = i915_driver_device_is_agp,

//    .master_create = i915_master_create,

//    .master_destroy = i915_master_destroy,

#if defined(CONFIG_DEBUG_FS)

	.debugfs_init = i915_debugfs_init,

	.debugfs_cleanup = i915_debugfs_cleanup,

#endif

    .gem_init_object = i915_gem_init_object,

    .gem_free_object = i915_gem_free_object,

//    .prime_handle_to_fd = drm_gem_prime_handle_to_fd,

//    .prime_fd_to_handle = drm_gem_prime_fd_to_handle,

//    .gem_prime_export = i915_gem_prime_export,

//    .gem_prime_import = i915_gem_prime_import,

//    .dumb_create = i915_gem_dumb_create,

//    .dumb_map_offset = i915_gem_mmap_gtt,

//    .dumb_destroy = i915_gem_dumb_destroy,

//    .ioctls = i915_ioctls,

//    .fops = &i915_driver_fops,

//    .name = DRIVER_NAME,

//    .desc = DRIVER_DESC,

//    .date = DRIVER_DATE,

//    .major = DRIVER_MAJOR,

//    .minor = DRIVER_MINOR,

//    .patchlevel = DRIVER_PATCHLEVEL,

};

int i915_init(void)

{

    static pci_dev_t device;

    const struct pci_device_id  *ent;

    int  err;

    ent = find_pci_device(&device, pciidlist);

    if( unlikely(ent == NULL) )

    {

        dbgprintf("device not found\n");

        return -ENODEV;

    };

    drm_core_init();

    DRM_INFO("device %x:%x\n", device.pci_dev.vendor,

                                device.pci_dev.device);

    driver.driver_features |= DRIVER_MODESET;

    err = drm_get_pci_dev(&device.pci_dev, ent, &driver);

    return err;

}

/* We give fast paths for the really cool registers */

#define NEEDS_FORCE_WAKE(dev_priv, reg) \

	((HAS_FORCE_WAKE((dev_priv)->dev)) && \

	 ((reg) < 0x40000) &&            \

	 ((reg) != FORCEWAKE))

static bool IS_DISPLAYREG(u32 reg)

{

	/*

	 * This should make it easier to transition modules over to the

	 * new register block scheme, since we can do it incrementally.

	 */

	if (reg >= VLV_DISPLAY_BASE)

		return false;

	if (reg >= RENDER_RING_BASE &&

	    reg < RENDER_RING_BASE + 0xff)

		return false;

	if (reg >= GEN6_BSD_RING_BASE &&

	    reg < GEN6_BSD_RING_BASE + 0xff)

		return false;

	if (reg >= BLT_RING_BASE &&

	    reg < BLT_RING_BASE + 0xff)

		return false;

	if (reg == PGTBL_ER)

		return false;

	if (reg >= IPEIR_I965 &&

	    reg < HWSTAM)

		return false;

	if (reg == MI_MODE)

		return false;

	if (reg == GFX_MODE_GEN7)

		return false;

	if (reg == RENDER_HWS_PGA_GEN7 ||

	    reg == BSD_HWS_PGA_GEN7 ||

	    reg == BLT_HWS_PGA_GEN7)

		return false;

	if (reg == GEN6_BSD_SLEEP_PSMI_CONTROL ||

	    reg == GEN6_BSD_RNCID)

		return false;

	if (reg == GEN6_BLITTER_ECOSKPD)

		return false;

	if (reg >= 0x4000c &&

	    reg <= 0x4002c)

		return false;

	if (reg >= 0x4f000 &&

	    reg <= 0x4f08f)

		return false;

	if (reg >= 0x4f100 &&

	    reg <= 0x4f11f)

		return false;

	if (reg >= VLV_MASTER_IER &&

	    reg <= GEN6_PMIER)

		return false;

	if (reg >= FENCE_REG_SANDYBRIDGE_0 &&

	    reg < (FENCE_REG_SANDYBRIDGE_0 + (16*8)))

		return false;

	if (reg >= VLV_IIR_RW &&

	    reg <= VLV_ISR)

		return false;

	if (reg == FORCEWAKE_VLV ||

	    reg == FORCEWAKE_ACK_VLV)

		return false;

	if (reg == GEN6_GDRST)

		return false;

	switch (reg) {

	case _3D_CHICKEN3:

	case IVB_CHICKEN3:

	case GEN7_COMMON_SLICE_CHICKEN1:

	case GEN7_L3CNTLREG1:

	case GEN7_L3_CHICKEN_MODE_REGISTER:

	case GEN7_ROW_CHICKEN2:

	case GEN7_L3SQCREG4:

	case GEN7_SQ_CHICKEN_MBCUNIT_CONFIG:

	case GEN7_HALF_SLICE_CHICKEN1:

	case GEN6_MBCTL:

	case GEN6_UCGCTL2:

		return false;

	default:

		break;

	}

	return true;

}

/* We give fast paths for the really cool registers */

#define NEEDS_FORCE_WAKE(dev_priv, reg) \

	((HAS_FORCE_WAKE((dev_priv)->dev)) && \

	 ((reg) < 0x40000) &&            \

	 ((reg) != FORCEWAKE))

static void

ilk_dummy_write(struct drm_i915_private *dev_priv)

{

	/* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up

	 * the chip from rc6 before touching it for real. MI_MODE is masked,

	 * hence harmless to write 0 into. */

	I915_WRITE_NOTRACE(MI_MODE, 0);

}

static void

hsw_unclaimed_reg_clear(struct drm_i915_private *dev_priv, u32 reg)

{

	if (HAS_FPGA_DBG_UNCLAIMED(dev_priv->dev) &&

	    (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {

		DRM_ERROR("Unknown unclaimed register before writing to %x\n",

			  reg);

		I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);

	}

}

static void

hsw_unclaimed_reg_check(struct drm_i915_private *dev_priv, u32 reg)

{

	if (HAS_FPGA_DBG_UNCLAIMED(dev_priv->dev) &&