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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 "drmP.h"

#include "drm.h"

#include "i915_drm.h"

#include "i915_drv.h"

#include "intel_drv.h"

#include 

#include 

#include 

#include 

#include 

#include 

#define __read_mostly

int init_display_kms(struct drm_device *dev);

struct drm_device *main_device;

int i915_panel_ignore_lid __read_mostly         =  0;

unsigned int i915_powersave  __read_mostly      =  0;

unsigned int i915_enable_rc6 __read_mostly      = -1;

unsigned int i915_enable_fbc __read_mostly      =  0;

unsigned int i915_lvds_downclock  __read_mostly =  0;

unsigned int i915_panel_use_ssc __read_mostly   =  1;

int i915_vbt_sdvo_panel_type __read_mostly      = -1;

#define PCI_VENDOR_ID_INTEL        0x8086

#define INTEL_VGA_DEVICE(id, info) {        \

	.class = PCI_BASE_CLASS_DISPLAY << 16,	\

    .class_mask = 0xff0000,                 \

    .vendor = 0x8086,                       \

    .device = id,                           \

    .subvendor = PCI_ANY_ID,                \

    .subdevice = PCI_ANY_ID,                \

    .driver_data = (unsigned long) info }

static const struct intel_device_info intel_i915g_info = {

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

	.has_overlay = 1, .overlay_needs_physical = 1,

};

static const struct intel_device_info intel_i915gm_info = {

	.gen = 3, .is_mobile = 1,

	.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,

	.has_overlay = 1, .overlay_needs_physical = 1,

};

static const struct intel_device_info intel_i945gm_info = {

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

	.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,

	.has_hotplug = 1,

	.has_overlay = 1,

};

static const struct intel_device_info intel_i965gm_info = {

	.gen = 4, .is_crestline = 1,

	.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,

	.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,

	.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,

	.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,

	.need_gfx_hws = 1, .has_hotplug = 1,

	.has_overlay = 1,

};

static const struct intel_device_info intel_ironlake_d_info = {

	.gen = 5,

	.need_gfx_hws = 1, .has_pipe_cxsr = 1, .has_hotplug = 1,

	.has_bsd_ring = 1,

};

static const struct intel_device_info intel_ironlake_m_info = {

	.gen = 5, .is_mobile = 1,

	.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,

	.need_gfx_hws = 1, .has_hotplug = 1,

    .has_bsd_ring = 1,

    .has_blt_ring = 1,

};

static const struct intel_device_info intel_sandybridge_m_info = {

	.gen = 6, .is_mobile = 1,

	.need_gfx_hws = 1, .has_hotplug = 1,

    .has_fbc      = 1,

    .has_bsd_ring = 1,

    .has_blt_ring = 1,

};

static const struct intel_device_info intel_ivybridge_d_info = {

	.is_ivybridge = 1, .gen = 7,

	.need_gfx_hws = 1, .has_hotplug = 1,

	.has_bsd_ring = 1,

	.has_blt_ring = 1,

};

static const struct intel_device_info intel_ivybridge_m_info = {

	.is_ivybridge = 1, .gen = 7, .is_mobile = 1,

	.need_gfx_hws = 1, .has_hotplug = 1,

	.has_fbc = 0,	/* FBC is not enabled on Ivybridge mobile yet */

	.has_bsd_ring = 1,

	.has_blt_ring = 1,

};

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

	INTEL_VGA_DEVICE(0x2582, &intel_i915g_info),		/* I915_G */

	INTEL_VGA_DEVICE(0x258a, &intel_i915g_info),		/* E7221_G */

	INTEL_VGA_DEVICE(0x2592, &intel_i915gm_info),		/* I915_GM */

	INTEL_VGA_DEVICE(0x2772, &intel_i945g_info),		/* I945_G */

	INTEL_VGA_DEVICE(0x27a2, &intel_i945gm_info),		/* I945_GM */

	INTEL_VGA_DEVICE(0x27ae, &intel_i945gm_info),		/* I945_GME */

	INTEL_VGA_DEVICE(0x2972, &intel_i965g_info),		/* I946_GZ */

	INTEL_VGA_DEVICE(0x2982, &intel_i965g_info),		/* G35_G */

	INTEL_VGA_DEVICE(0x2992, &intel_i965g_info),		/* I965_Q */

	INTEL_VGA_DEVICE(0x29a2, &intel_i965g_info),		/* I965_G */

	INTEL_VGA_DEVICE(0x29b2, &intel_g33_info),		/* Q35_G */

	INTEL_VGA_DEVICE(0x29c2, &intel_g33_info),		/* G33_G */

	INTEL_VGA_DEVICE(0x29d2, &intel_g33_info),		/* Q33_G */

	INTEL_VGA_DEVICE(0x2a02, &intel_i965gm_info),		/* I965_GM */

	INTEL_VGA_DEVICE(0x2a12, &intel_i965gm_info),		/* I965_GME */

	INTEL_VGA_DEVICE(0x2a42, &intel_gm45_info),		/* GM45_G */

	INTEL_VGA_DEVICE(0x2e02, &intel_g45_info),		/* IGD_E_G */

	INTEL_VGA_DEVICE(0x2e12, &intel_g45_info),		/* Q45_G */

	INTEL_VGA_DEVICE(0x2e22, &intel_g45_info),		/* G45_G */

	INTEL_VGA_DEVICE(0x2e32, &intel_g45_info),		/* G41_G */

	INTEL_VGA_DEVICE(0x2e42, &intel_g45_info),		/* B43_G */

	INTEL_VGA_DEVICE(0x2e92, &intel_g45_info),		/* B43_G.1 */

	INTEL_VGA_DEVICE(0xa001, &intel_pineview_info),

	INTEL_VGA_DEVICE(0xa011, &intel_pineview_info),

	INTEL_VGA_DEVICE(0x0042, &intel_ironlake_d_info),

	INTEL_VGA_DEVICE(0x0046, &intel_ironlake_m_info),

    INTEL_VGA_DEVICE(0x0102, &intel_sandybridge_d_info),

    INTEL_VGA_DEVICE(0x0112, &intel_sandybridge_d_info),

    INTEL_VGA_DEVICE(0x0122, &intel_sandybridge_d_info),

    INTEL_VGA_DEVICE(0x0106, &intel_sandybridge_m_info),

    INTEL_VGA_DEVICE(0x0116, &intel_sandybridge_m_info),

    INTEL_VGA_DEVICE(0x0126, &intel_sandybridge_m_info),

    INTEL_VGA_DEVICE(0x010A, &intel_sandybridge_d_info),

	INTEL_VGA_DEVICE(0x0156, &intel_ivybridge_m_info), /* GT1 mobile */

	INTEL_VGA_DEVICE(0x0166, &intel_ivybridge_m_info), /* GT2 mobile */

	INTEL_VGA_DEVICE(0x0152, &intel_ivybridge_d_info), /* GT1 desktop */

	INTEL_VGA_DEVICE(0x0162, &intel_ivybridge_d_info), /* GT2 desktop */

	INTEL_VGA_DEVICE(0x015a, &intel_ivybridge_d_info), /* GT1 server */

    {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

void intel_detect_pch(struct drm_device *dev)

{

    struct drm_i915_private *dev_priv = dev->dev_private;

    struct pci_dev *pch;

    /*

     * 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.

     */

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

    if (pch) {

        if (pch->vendor == PCI_VENDOR_ID_INTEL) {

            int id;

            id = pch->device & INTEL_PCH_DEVICE_ID_MASK;

            if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {

                dev_priv->pch_type = PCH_IBX;

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

            } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {

                dev_priv->pch_type = PCH_CPT;

                DRM_DEBUG_KMS("Found CougarPoint PCH\n");

            } 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");

            }

        }

    }

}

void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)

{

    int count;

    count = 0;

    while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1))

        udelay(10);

    I915_WRITE_NOTRACE(FORCEWAKE, 1);

    POSTING_READ(FORCEWAKE);

    count = 0;

    while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0)

        udelay(10);

}

void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)

{

	int count;

	count = 0;

	while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1))

		udelay(10);

	I915_WRITE_NOTRACE(FORCEWAKE_MT, (1<<16) | 1);

	POSTING_READ(FORCEWAKE_MT);

	count = 0;

	while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1) == 0)

		udelay(10);

}

/*

 * Generally this is called implicitly by the register read function. However,

 * if some sequence requires the GT to not power down then this function should

 * be called at the beginning of the sequence followed by a call to

 * gen6_gt_force_wake_put() at the end of the sequence.

 */

void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)

{

	unsigned long irqflags;

	spin_lock_irqsave(&dev_priv->gt_lock, irqflags);

	if (dev_priv->forcewake_count++ == 0)

		dev_priv->display.force_wake_get(dev_priv);

	spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);

}

void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)

{

    I915_WRITE_NOTRACE(FORCEWAKE, 0);

    POSTING_READ(FORCEWAKE);

}

void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv)

{

	I915_WRITE_NOTRACE(FORCEWAKE_MT, (1<<16) | 0);

	POSTING_READ(FORCEWAKE_MT);

}

/*

 * see gen6_gt_force_wake_get()

 */

void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)

{

	unsigned long irqflags;

	spin_lock_irqsave(&dev_priv->gt_lock, irqflags);

	if (--dev_priv->forcewake_count == 0)

		dev_priv->display.force_wake_put(dev_priv);

	spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);

}

void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)

{

	if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {

        int loop = 500;

        u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);

        while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {

            udelay(10);

            fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);

        }

//        WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES);

        dev_priv->gt_fifo_count = fifo;

    }

    dev_priv->gt_fifo_count--;

}

int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent);

int i915_init(void)

{

    static pci_dev_t device;

    const struct pci_device_id  *ent;

    int  err;

    if( init_agp() != 0)

    {

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

        return 0;

    };

    ent = find_pci_device(&device, pciidlist);

    if( unlikely(ent == NULL) )

    {

        dbgprintf("device not found\n");

        return 0;

    };

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

                                device.pci_dev.device);

    err = drm_get_dev(&device.pci_dev, ent);

    return err;

}

int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent)

{

    struct drm_device *dev;

    int ret;

    ENTER();

    dev = kzalloc(sizeof(*dev), 0);

    if (!dev)

        return -ENOMEM;

 //   ret = pci_enable_device(pdev);

 //   if (ret)

 //       goto err_g1;

 //   pci_set_master(pdev);

 //   if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {

 //       printk(KERN_ERR "DRM: Fill_in_dev failed.\n");

 //       goto err_g2;

 //   }

    dev->pdev = pdev;

    dev->pci_device = pdev->device;

    dev->pci_vendor = pdev->vendor;

    INIT_LIST_HEAD(&dev->filelist);

    INIT_LIST_HEAD(&dev->ctxlist);

    INIT_LIST_HEAD(&dev->vmalist);

    INIT_LIST_HEAD(&dev->maplist);

    spin_lock_init(&dev->count_lock);

    mutex_init(&dev->struct_mutex);

    mutex_init(&dev->ctxlist_mutex);

    ret = i915_driver_load(dev, ent->driver_data );

    if (ret)

        goto err_g4;

    ret = init_display_kms(dev);

    if (ret)

        goto err_g4;

    LEAVE();

    return 0;

err_g4:

//    drm_put_minor(&dev->primary);

//err_g3:

//    if (drm_core_check_feature(dev, DRIVER_MODESET))

//        drm_put_minor(&dev->control);

//err_g2:

//    pci_disable_device(pdev);

//err_g1:

    free(dev);

    LEAVE();

    return ret;

}

#define __i915_read(x, y) \

u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \

	u##x val = 0; \

	if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \

		unsigned long irqflags; \

		spin_lock_irqsave(&dev_priv->gt_lock, irqflags); \

		if (dev_priv->forcewake_count == 0) \

			dev_priv->display.force_wake_get(dev_priv); \

		val = read##y(dev_priv->regs + reg); \

		if (dev_priv->forcewake_count == 0) \

			dev_priv->display.force_wake_put(dev_priv); \

		spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); \

	} else { \

		val = read##y(dev_priv->regs + reg); \

	} \

	return val; \

}

__i915_read(8, b)

__i915_read(16, w)

__i915_read(32, l)

__i915_read(64, q)

#undef __i915_read

#define __i915_write(x, y) \

void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \

	if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \

		__gen6_gt_wait_for_fifo(dev_priv); \

	} \

	write##y(val, dev_priv->regs + reg); \

}

__i915_write(8, b)

__i915_write(16, w)

__i915_write(32, l)

__i915_write(64, q)

#undef __i915_write