int i915_restore_state(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;

	pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);

	/* Render Standby */
	if (IS_I965G(dev) && IS_MOBILE(dev))
		I915_WRITE(MCHBAR_RENDER_STANDBY, dev_priv->saveRENDERSTANDBY);

	/* Hardware status page */
	I915_WRITE(HWS_PGA, dev_priv->saveHWS);

	/* Fences */
	if (IS_I965G(dev)) {
		for (i = 0; i < 16; i++)
			I915_WRITE64(FENCE_REG_965_0 + (i * 8), dev_priv->saveFENCE[i]);
	} else {
		for (i = 0; i < 8; i++)
			I915_WRITE(FENCE_REG_830_0 + (i * 4), dev_priv->saveFENCE[i]);
		if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
			for (i = 0; i < 8; i++)
				I915_WRITE(FENCE_REG_945_8 + (i * 4), dev_priv->saveFENCE[i+8]);
	}

	i915_restore_display(dev);

	/* Interrupt state */
	if (IS_IGDNG(dev)) {
		I915_WRITE(DEIER, dev_priv->saveDEIER);
		I915_WRITE(DEIMR, dev_priv->saveDEIMR);
		I915_WRITE(GTIER, dev_priv->saveGTIER);
		I915_WRITE(GTIMR, dev_priv->saveGTIMR);
		I915_WRITE(FDI_RXA_IMR, dev_priv->saveFDI_RXA_IMR);
		I915_WRITE(FDI_RXB_IMR, dev_priv->saveFDI_RXB_IMR);
	} else {
		I915_WRITE (IER, dev_priv->saveIER);
		I915_WRITE (IMR,  dev_priv->saveIMR);
	}

	/* Clock gating state */
	I915_WRITE (D_STATE, dev_priv->saveD_STATE);
	I915_WRITE (DSPCLK_GATE_D, dev_priv->saveDSPCLK_GATE_D);

	/* Cache mode state */
	I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);

	/* Memory arbitration state */
	I915_WRITE (MI_ARB_STATE, dev_priv->saveMI_ARB_STATE | 0xffff0000);

	for (i = 0; i < 16; i++) {
		I915_WRITE(SWF00 + (i << 2), dev_priv->saveSWF0[i]);
		I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i]);
	}
	for (i = 0; i < 3; i++)
		I915_WRITE(SWF30 + (i << 2), dev_priv->saveSWF2[i]);

	return 0;
}

/* Check pitch constriants for all chips & tiling formats */
bool
i915_tiling_ok(struct drm_device *dev, int stride, int size, int tiling_mode)
{
	int tile_width;

	/* Linear is always fine */
	if (tiling_mode == I915_TILING_NONE)
		return true;

	if (!IS_I9XX(dev) ||
	    (tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev)))
		tile_width = 128;
	else
		tile_width = 512;

	/* check maximum stride & object size */
	if (IS_I965G(dev)) {
		/* i965 stores the end address of the gtt mapping in the fence
		 * reg, so dont bother to check the size */
		if (stride / 128 > I965_FENCE_MAX_PITCH_VAL)
			return false;
	} else if (IS_GEN3(dev) || IS_GEN2(dev)) {
		if (stride > 8192)
			return false;

		if (IS_GEN3(dev)) {
			if (size > I830_FENCE_MAX_SIZE_VAL << 20)
				return false;
		} else {
			if (size > I830_FENCE_MAX_SIZE_VAL << 19)
				return false;
		}
	}

	/* 965+ just needs multiples of tile width */
	if (IS_I965G(dev)) {
		if (stride & (tile_width - 1))
			return false;
		return true;
	}

	/* Pre-965 needs power of two tile widths */
	if (stride < tile_width)
		return false;

	if (stride & (stride - 1))
		return false;

	return true;
}

/**
 * Returns the size of the fence for a tiled object of the given size.
 */
static int
i915_get_fence_size(struct drm_device *dev, int size)
{
	int i;
	int start;

	if (IS_I965G(dev)) {
		/* The 965 can have fences at any page boundary. */

		return (size + PAGE_SIZE-1) & ~(PAGE_SIZE-1);
	} else {
		/* Align the size to a power of two greater than the smallest
		 * fence size.
		 */
		if (IS_I9XX(dev))
			start = 1024 * 1024;
		else
			start = 512 * 1024;

		for (i = start; i < size; i <<= 1)
			;

		return i;
	}
}

/**
 * Returns whether an object is currently fenceable.  If not, it may need
 * to be unbound and have its pitch adjusted.
 */
bool
i915_obj_fenceable(struct drm_device *dev, struct drm_gem_object *obj)
{
	struct drm_i915_gem_object *obj_priv = obj->driver_private;

	if (IS_I965G(dev)) {
		/* The 965 can have fences at any page boundary. */
		if (obj->size & 4095)
			return false;
		return true;
	} else if (IS_I9XX(dev)) {
		if (obj_priv->gtt_offset & ~I915_FENCE_START_MASK)
			return false;
	} else {
		if (obj_priv->gtt_offset & ~I830_FENCE_START_MASK)
			return false;
	}

	/* Power of two sized... */
	if (obj->size & (obj->size - 1))
		return false;

	/* Objects must be size aligned as well */
	if (obj_priv->gtt_offset & (obj->size - 1))
		return false;
	return true;
}

static bool
i915_gem_object_fence_offset_ok(struct drm_gem_object *obj, int tiling_mode)
{
	struct drm_device *dev = obj->dev;
	struct drm_i915_gem_object *obj_priv = obj->driver_private;

	if (obj_priv->gtt_space == NULL)
		return true;

	if (tiling_mode == I915_TILING_NONE)
		return true;

	if (!IS_I965G(dev)) {
		if (obj_priv->gtt_offset & (obj->size - 1))
			return false;
		if (IS_I9XX(dev)) {
			if (obj_priv->gtt_offset & ~I915_FENCE_START_MASK)
				return false;
		} else {
			if (obj_priv->gtt_offset & ~I830_FENCE_START_MASK)
				return false;
		}
	}

	return true;
}

int i915_save_state(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;

	pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);

	/* Hardware status page */
	dev_priv->saveHWS = I915_READ(HWS_PGA);

	i915_save_display(dev);

	/* Interrupt state */
	if (IS_IRONLAKE(dev)) {
		dev_priv->saveDEIER = I915_READ(DEIER);
		dev_priv->saveDEIMR = I915_READ(DEIMR);
		dev_priv->saveGTIER = I915_READ(GTIER);
		dev_priv->saveGTIMR = I915_READ(GTIMR);
		dev_priv->saveFDI_RXA_IMR = I915_READ(FDI_RXA_IMR);
		dev_priv->saveFDI_RXB_IMR = I915_READ(FDI_RXB_IMR);
		dev_priv->saveMCHBAR_RENDER_STANDBY =
			I915_READ(MCHBAR_RENDER_STANDBY);
	} else {
		dev_priv->saveIER = I915_READ(IER);
		dev_priv->saveIMR = I915_READ(IMR);
	}

	if (IS_IRONLAKE_M(dev))
		ironlake_disable_drps(dev);

	/* Cache mode state */
	dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);

	/* Memory Arbitration state */
	dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);

	/* Scratch space */
	for (i = 0; i < 16; i++) {
		dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
		dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
	}
	for (i = 0; i < 3; i++)
		dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));

	/* Fences */
	if (IS_I965G(dev)) {
		for (i = 0; i < 16; i++)
			dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
	} else {
		for (i = 0; i < 8; i++)
			dev_priv->saveFENCE[i] = I915_READ(FENCE_REG_830_0 + (i * 4));

		if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
			for (i = 0; i < 8; i++)
				dev_priv->saveFENCE[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
	}

	return 0;
}

/* Check pitch constriants for all chips & tiling formats */
static int 
i915_tiling_ok(struct drm_device *dev, int stride, int size, int tiling_mode)
{
	int tile_width;

	/* Linear is always fine */
	if (tiling_mode == I915_TILING_NONE)
		return 1;

	if (tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev))
		tile_width = 128;
	else
		tile_width = 512;

	if (stride == 0)
		return 0;

	/* 965+ just needs multiples of tile width */
	if (IS_I965G(dev)) {
		if (stride & (tile_width - 1))
			return 0;
		return 1;
	}

	/* Pre-965 needs power of two tile widths */
	if (stride < tile_width)
		return 0;

	if (!ISP2(stride))
		return 0;

	/* We don't handle the aperture area covered by the fence being bigger
	 * than the object size.
	 */
	if (i915_get_fence_size(dev, size) != size)
		return 0;

	return 1;
}

static void
intel_teardown_mchbar(struct drm_device *dev, bool disable)
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915;
	u32 temp;

	if (disable) {
		if (IS_I915G(dev) || IS_I915GM(dev)) {
			pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
			temp &= ~DEVEN_MCHBAR_EN;
			pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
		} else {
			pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
			temp &= ~1;
			pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
		}
	}

	if (dev_priv->mch_res.start)
		release_resource(&dev_priv->mch_res);
}

/**
 * Emit blits for scheduled buffer swaps.
 *
 * This function will be called with the HW lock held.
 */
static void i915_vblank_tasklet(struct drm_device *dev)
{
	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
	struct list_head *list, *tmp, hits, *hit;
	int nhits, nrects, slice[2], upper[2], lower[2], i, num_pages;
	unsigned counter[2];
	struct drm_drawable_info *drw;
	drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv;
	u32 cpp = dev_priv->cpp,  offsets[3];
	u32 cmd = (cpp == 4) ? (XY_SRC_COPY_BLT_CMD |
				XY_SRC_COPY_BLT_WRITE_ALPHA |
				XY_SRC_COPY_BLT_WRITE_RGB)
			     : XY_SRC_COPY_BLT_CMD;
	u32 src_pitch = sarea_priv->pitch * cpp;
	u32 dst_pitch = sarea_priv->pitch * cpp;
	/* COPY rop (0xcc), map cpp to magic color depth constants */
	u32 ropcpp = (0xcc << 16) | ((cpp - 1) << 24);
	RING_LOCALS;
	
	if (IS_I965G(dev) && sarea_priv->front_tiled) {
		cmd |= XY_SRC_COPY_BLT_DST_TILED;
		dst_pitch >>= 2;
	}

/**
 * Emit blits for scheduled buffer swaps.
 *
 * This function will be called with the HW lock held.
 */
static void i915_vblank_tasklet(struct drm_device *dev)
{
    drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
    unsigned long irqflags;
    struct list_head *list, *tmp, hits, *hit;
    int nhits, nrects, slice[2], upper[2], lower[2], i;
    unsigned counter[2] = { atomic_read(&dev->vbl_received),
                atomic_read(&dev->vbl_received2) };
    struct drm_drawable_info *drw;
    drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv;
    u32 cpp = dev_priv->cpp;
    u32 cmd = (cpp == 4) ? (XY_SRC_COPY_BLT_CMD |
                XY_SRC_COPY_BLT_WRITE_ALPHA |
                XY_SRC_COPY_BLT_WRITE_RGB)
                 : XY_SRC_COPY_BLT_CMD;
    u32 src_pitch = sarea_priv->pitch * cpp;
    u32 dst_pitch = sarea_priv->pitch * cpp;
    u32 ropcpp = (0xcc << 16) | ((cpp - 1) << 24);
    RING_LOCALS;

    if (IS_I965G(dev) && sarea_priv->front_tiled) {
        cmd |= XY_SRC_COPY_BLT_DST_TILED;
        dst_pitch >>= 2;
    }

/* Setup MCHBAR if possible, return true if we should disable it again */
static bool
intel_setup_mchbar(struct drm_device *dev)
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915;
	u32 temp;
	bool need_disable = false, enabled;

	if (IS_I915G(dev) || IS_I915GM(dev)) {
		pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
		enabled = !!(temp & DEVEN_MCHBAR_EN);
	} else {
		pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
		enabled = temp & 1;
	}

	/* If it's already enabled, don't have to do anything */
	if (enabled)
		goto out;

	if (intel_alloc_mchbar_resource(dev))
		goto out;

	need_disable = true;

	/* Space is allocated or reserved, so enable it. */
	if (IS_I915G(dev) || IS_I915GM(dev)) {
		pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
				       temp | DEVEN_MCHBAR_EN);
	} else {
		pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
		pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
	}
out:
	return need_disable;
}

static void i915_save_modeset_reg(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	if (drm_core_check_feature(dev, DRIVER_MODESET))
		return;

	if (IS_IRONLAKE(dev)) {
		dev_priv->savePCH_DREF_CONTROL = I915_READ(PCH_DREF_CONTROL);
		dev_priv->saveDISP_ARB_CTL = I915_READ(DISP_ARB_CTL);
	}

	/* Pipe & plane A info */
	dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
	dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
	if (IS_IRONLAKE(dev)) {
		dev_priv->saveFPA0 = I915_READ(PCH_FPA0);
		dev_priv->saveFPA1 = I915_READ(PCH_FPA1);
		dev_priv->saveDPLL_A = I915_READ(PCH_DPLL_A);
	} else {
		dev_priv->saveFPA0 = I915_READ(FPA0);
		dev_priv->saveFPA1 = I915_READ(FPA1);
		dev_priv->saveDPLL_A = I915_READ(DPLL_A);
	}
	if (IS_I965G(dev) && !IS_IRONLAKE(dev))
		dev_priv->saveDPLL_A_MD = I915_READ(DPLL_A_MD);
	dev_priv->saveHTOTAL_A = I915_READ(HTOTAL_A);
	dev_priv->saveHBLANK_A = I915_READ(HBLANK_A);
	dev_priv->saveHSYNC_A = I915_READ(HSYNC_A);
	dev_priv->saveVTOTAL_A = I915_READ(VTOTAL_A);
	dev_priv->saveVBLANK_A = I915_READ(VBLANK_A);
	dev_priv->saveVSYNC_A = I915_READ(VSYNC_A);
	if (!IS_IRONLAKE(dev))
		dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);

	if (IS_IRONLAKE(dev)) {
		dev_priv->savePIPEA_DATA_M1 = I915_READ(PIPEA_DATA_M1);
		dev_priv->savePIPEA_DATA_N1 = I915_READ(PIPEA_DATA_N1);
		dev_priv->savePIPEA_LINK_M1 = I915_READ(PIPEA_LINK_M1);
		dev_priv->savePIPEA_LINK_N1 = I915_READ(PIPEA_LINK_N1);

		dev_priv->saveFDI_TXA_CTL = I915_READ(FDI_TXA_CTL);
		dev_priv->saveFDI_RXA_CTL = I915_READ(FDI_RXA_CTL);

		dev_priv->savePFA_CTL_1 = I915_READ(PFA_CTL_1);
		dev_priv->savePFA_WIN_SZ = I915_READ(PFA_WIN_SZ);
		dev_priv->savePFA_WIN_POS = I915_READ(PFA_WIN_POS);

		dev_priv->saveTRANSACONF = I915_READ(TRANSACONF);
		dev_priv->saveTRANS_HTOTAL_A = I915_READ(TRANS_HTOTAL_A);
		dev_priv->saveTRANS_HBLANK_A = I915_READ(TRANS_HBLANK_A);
		dev_priv->saveTRANS_HSYNC_A = I915_READ(TRANS_HSYNC_A);
		dev_priv->saveTRANS_VTOTAL_A = I915_READ(TRANS_VTOTAL_A);
		dev_priv->saveTRANS_VBLANK_A = I915_READ(TRANS_VBLANK_A);
		dev_priv->saveTRANS_VSYNC_A = I915_READ(TRANS_VSYNC_A);
	}

	dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
	dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
	dev_priv->saveDSPASIZE = I915_READ(DSPASIZE);
	dev_priv->saveDSPAPOS = I915_READ(DSPAPOS);
	dev_priv->saveDSPAADDR = I915_READ(DSPAADDR);
	if (IS_I965G(dev)) {
		dev_priv->saveDSPASURF = I915_READ(DSPASURF);
		dev_priv->saveDSPATILEOFF = I915_READ(DSPATILEOFF);
	}
	i915_save_palette(dev, PIPE_A);
	dev_priv->savePIPEASTAT = I915_READ(PIPEASTAT);

	/* Pipe & plane B info */
	dev_priv->savePIPEBCONF = I915_READ(PIPEBCONF);
	dev_priv->savePIPEBSRC = I915_READ(PIPEBSRC);
	if (IS_IRONLAKE(dev)) {
		dev_priv->saveFPB0 = I915_READ(PCH_FPB0);
		dev_priv->saveFPB1 = I915_READ(PCH_FPB1);
		dev_priv->saveDPLL_B = I915_READ(PCH_DPLL_B);
	} else {
		dev_priv->saveFPB0 = I915_READ(FPB0);
		dev_priv->saveFPB1 = I915_READ(FPB1);
		dev_priv->saveDPLL_B = I915_READ(DPLL_B);
	}
	if (IS_I965G(dev) && !IS_IRONLAKE(dev))
		dev_priv->saveDPLL_B_MD = I915_READ(DPLL_B_MD);
	dev_priv->saveHTOTAL_B = I915_READ(HTOTAL_B);
	dev_priv->saveHBLANK_B = I915_READ(HBLANK_B);
	dev_priv->saveHSYNC_B = I915_READ(HSYNC_B);
	dev_priv->saveVTOTAL_B = I915_READ(VTOTAL_B);
	dev_priv->saveVBLANK_B = I915_READ(VBLANK_B);
	dev_priv->saveVSYNC_B = I915_READ(VSYNC_B);
	if (!IS_IRONLAKE(dev))
		dev_priv->saveBCLRPAT_B = I915_READ(BCLRPAT_B);

	if (IS_IRONLAKE(dev)) {
		dev_priv->savePIPEB_DATA_M1 = I915_READ(PIPEB_DATA_M1);
		dev_priv->savePIPEB_DATA_N1 = I915_READ(PIPEB_DATA_N1);
		dev_priv->savePIPEB_LINK_M1 = I915_READ(PIPEB_LINK_M1);
		dev_priv->savePIPEB_LINK_N1 = I915_READ(PIPEB_LINK_N1);

		dev_priv->saveFDI_TXB_CTL = I915_READ(FDI_TXB_CTL);
		dev_priv->saveFDI_RXB_CTL = I915_READ(FDI_RXB_CTL);
//.........这里部分代码省略.........

static void i915_save_modeset_reg(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	if (drm_core_check_feature(dev, DRIVER_MODESET))
		return;
	/* Pipe & plane A info */
	dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
	dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
	dev_priv->saveFPA0 = I915_READ(FPA0);
	dev_priv->saveFPA1 = I915_READ(FPA1);
	dev_priv->saveDPLL_A = I915_READ(DPLL_A);
	if (IS_I965G(dev))
		dev_priv->saveDPLL_A_MD = I915_READ(DPLL_A_MD);
	dev_priv->saveHTOTAL_A = I915_READ(HTOTAL_A);
	dev_priv->saveHBLANK_A = I915_READ(HBLANK_A);
	dev_priv->saveHSYNC_A = I915_READ(HSYNC_A);
	dev_priv->saveVTOTAL_A = I915_READ(VTOTAL_A);
	dev_priv->saveVBLANK_A = I915_READ(VBLANK_A);
	dev_priv->saveVSYNC_A = I915_READ(VSYNC_A);
	dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);

	dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
	dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
	dev_priv->saveDSPASIZE = I915_READ(DSPASIZE);
	dev_priv->saveDSPAPOS = I915_READ(DSPAPOS);
	dev_priv->saveDSPAADDR = I915_READ(DSPAADDR);
	if (IS_I965G(dev)) {
		dev_priv->saveDSPASURF = I915_READ(DSPASURF);
		dev_priv->saveDSPATILEOFF = I915_READ(DSPATILEOFF);
	}
	i915_save_palette(dev, PIPE_A);
	dev_priv->savePIPEASTAT = I915_READ(PIPEASTAT);

	/* Pipe & plane B info */
	dev_priv->savePIPEBCONF = I915_READ(PIPEBCONF);
	dev_priv->savePIPEBSRC = I915_READ(PIPEBSRC);
	dev_priv->saveFPB0 = I915_READ(FPB0);
	dev_priv->saveFPB1 = I915_READ(FPB1);
	dev_priv->saveDPLL_B = I915_READ(DPLL_B);
	if (IS_I965G(dev))
		dev_priv->saveDPLL_B_MD = I915_READ(DPLL_B_MD);
	dev_priv->saveHTOTAL_B = I915_READ(HTOTAL_B);
	dev_priv->saveHBLANK_B = I915_READ(HBLANK_B);
	dev_priv->saveHSYNC_B = I915_READ(HSYNC_B);
	dev_priv->saveVTOTAL_B = I915_READ(VTOTAL_B);
	dev_priv->saveVBLANK_B = I915_READ(VBLANK_B);
	dev_priv->saveVSYNC_B = I915_READ(VSYNC_B);
	dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);

	dev_priv->saveDSPBCNTR = I915_READ(DSPBCNTR);
	dev_priv->saveDSPBSTRIDE = I915_READ(DSPBSTRIDE);
	dev_priv->saveDSPBSIZE = I915_READ(DSPBSIZE);
	dev_priv->saveDSPBPOS = I915_READ(DSPBPOS);
	dev_priv->saveDSPBADDR = I915_READ(DSPBADDR);
	if (IS_I965GM(dev) || IS_GM45(dev)) {
		dev_priv->saveDSPBSURF = I915_READ(DSPBSURF);
		dev_priv->saveDSPBTILEOFF = I915_READ(DSPBTILEOFF);
	}
	i915_save_palette(dev, PIPE_B);
	dev_priv->savePIPEBSTAT = I915_READ(PIPEBSTAT);
	return;
}

static void i915_restore_modeset_reg(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	if (drm_core_check_feature(dev, DRIVER_MODESET))
		return;

	/* Pipe & plane A info */
	/* Prime the clock */
	if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
		I915_WRITE(DPLL_A, dev_priv->saveDPLL_A &
			   ~DPLL_VCO_ENABLE);
		DRM_UDELAY(150);
	}
	I915_WRITE(FPA0, dev_priv->saveFPA0);
	I915_WRITE(FPA1, dev_priv->saveFPA1);
	/* Actually enable it */
	I915_WRITE(DPLL_A, dev_priv->saveDPLL_A);
	DRM_UDELAY(150);
	if (IS_I965G(dev))
		I915_WRITE(DPLL_A_MD, dev_priv->saveDPLL_A_MD);
	DRM_UDELAY(150);

	/* Restore mode */
	I915_WRITE(HTOTAL_A, dev_priv->saveHTOTAL_A);
	I915_WRITE(HBLANK_A, dev_priv->saveHBLANK_A);
	I915_WRITE(HSYNC_A, dev_priv->saveHSYNC_A);
	I915_WRITE(VTOTAL_A, dev_priv->saveVTOTAL_A);
	I915_WRITE(VBLANK_A, dev_priv->saveVBLANK_A);
	I915_WRITE(VSYNC_A, dev_priv->saveVSYNC_A);
	I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);

	/* Restore plane info */
	I915_WRITE(DSPASIZE, dev_priv->saveDSPASIZE);
	I915_WRITE(DSPAPOS, dev_priv->saveDSPAPOS);
	I915_WRITE(PIPEASRC, dev_priv->savePIPEASRC);
	I915_WRITE(DSPAADDR, dev_priv->saveDSPAADDR);
	I915_WRITE(DSPASTRIDE, dev_priv->saveDSPASTRIDE);
	if (IS_I965G(dev)) {
		I915_WRITE(DSPASURF, dev_priv->saveDSPASURF);
		I915_WRITE(DSPATILEOFF, dev_priv->saveDSPATILEOFF);
	}

	I915_WRITE(PIPEACONF, dev_priv->savePIPEACONF);

	i915_restore_palette(dev, PIPE_A);
	/* Enable the plane */
	I915_WRITE(DSPACNTR, dev_priv->saveDSPACNTR);
	I915_WRITE(DSPAADDR, I915_READ(DSPAADDR));

	/* Pipe & plane B info */
	if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
		I915_WRITE(DPLL_B, dev_priv->saveDPLL_B &
			   ~DPLL_VCO_ENABLE);
		DRM_UDELAY(150);
	}
	I915_WRITE(FPB0, dev_priv->saveFPB0);
	I915_WRITE(FPB1, dev_priv->saveFPB1);
	/* Actually enable it */
	I915_WRITE(DPLL_B, dev_priv->saveDPLL_B);
	DRM_UDELAY(150);
	if (IS_I965G(dev))
		I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
	DRM_UDELAY(150);

	/* Restore mode */
	I915_WRITE(HTOTAL_B, dev_priv->saveHTOTAL_B);
	I915_WRITE(HBLANK_B, dev_priv->saveHBLANK_B);
	I915_WRITE(HSYNC_B, dev_priv->saveHSYNC_B);
	I915_WRITE(VTOTAL_B, dev_priv->saveVTOTAL_B);
	I915_WRITE(VBLANK_B, dev_priv->saveVBLANK_B);
	I915_WRITE(VSYNC_B, dev_priv->saveVSYNC_B);
	I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);

	/* Restore plane info */
	I915_WRITE(DSPBSIZE, dev_priv->saveDSPBSIZE);
	I915_WRITE(DSPBPOS, dev_priv->saveDSPBPOS);
	I915_WRITE(PIPEBSRC, dev_priv->savePIPEBSRC);
	I915_WRITE(DSPBADDR, dev_priv->saveDSPBADDR);
	I915_WRITE(DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
	if (IS_I965G(dev)) {
		I915_WRITE(DSPBSURF, dev_priv->saveDSPBSURF);
		I915_WRITE(DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
	}

	I915_WRITE(PIPEBCONF, dev_priv->savePIPEBCONF);

	i915_restore_palette(dev, PIPE_B);
	/* Enable the plane */
	I915_WRITE(DSPBCNTR, dev_priv->saveDSPBCNTR);
	I915_WRITE(DSPBADDR, I915_READ(DSPBADDR));

	return;
}

int i915_save_state(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;

	pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);

	/* Render Standby */
	if (IS_I965G(dev) && IS_MOBILE(dev))
		dev_priv->saveRENDERSTANDBY = I915_READ(MCHBAR_RENDER_STANDBY);

	/* Hardware status page */
	dev_priv->saveHWS = I915_READ(HWS_PGA);

	/* Display arbitration control */
	dev_priv->saveDSPARB = I915_READ(DSPARB);

	/* This is only meaningful in non-KMS mode */
	/* Don't save them in KMS mode */
	i915_save_modeset_reg(dev);
	/* Cursor state */
	dev_priv->saveCURACNTR = I915_READ(CURACNTR);
	dev_priv->saveCURAPOS = I915_READ(CURAPOS);
	dev_priv->saveCURABASE = I915_READ(CURABASE);
	dev_priv->saveCURBCNTR = I915_READ(CURBCNTR);
	dev_priv->saveCURBPOS = I915_READ(CURBPOS);
	dev_priv->saveCURBBASE = I915_READ(CURBBASE);
	if (!IS_I9XX(dev))
		dev_priv->saveCURSIZE = I915_READ(CURSIZE);

	/* CRT state */
	dev_priv->saveADPA = I915_READ(ADPA);

	/* LVDS state */
	dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
	dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
	if (IS_I965G(dev))
		dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
	if (IS_MOBILE(dev) && !IS_I830(dev))
		dev_priv->saveLVDS = I915_READ(LVDS);
	if (!IS_I830(dev) && !IS_845G(dev))
		dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
	dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
	dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
	dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);

	/* Display Port state */
	if (SUPPORTS_INTEGRATED_DP(dev)) {
		dev_priv->saveDP_B = I915_READ(DP_B);
		dev_priv->saveDP_C = I915_READ(DP_C);
		dev_priv->saveDP_D = I915_READ(DP_D);
		dev_priv->savePIPEA_GMCH_DATA_M = I915_READ(PIPEA_GMCH_DATA_M);
		dev_priv->savePIPEB_GMCH_DATA_M = I915_READ(PIPEB_GMCH_DATA_M);
		dev_priv->savePIPEA_GMCH_DATA_N = I915_READ(PIPEA_GMCH_DATA_N);
		dev_priv->savePIPEB_GMCH_DATA_N = I915_READ(PIPEB_GMCH_DATA_N);
		dev_priv->savePIPEA_DP_LINK_M = I915_READ(PIPEA_DP_LINK_M);
		dev_priv->savePIPEB_DP_LINK_M = I915_READ(PIPEB_DP_LINK_M);
		dev_priv->savePIPEA_DP_LINK_N = I915_READ(PIPEA_DP_LINK_N);
		dev_priv->savePIPEB_DP_LINK_N = I915_READ(PIPEB_DP_LINK_N);
	}
	/* FIXME: save TV & SDVO state */

	/* FBC state */
	dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
	dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
	dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
	dev_priv->saveFBC_CONTROL = I915_READ(FBC_CONTROL);

	/* Interrupt state */
	dev_priv->saveIIR = I915_READ(IIR);
	dev_priv->saveIER = I915_READ(IER);
	dev_priv->saveIMR = I915_READ(IMR);

	/* VGA state */
	dev_priv->saveVGA0 = I915_READ(VGA0);
	dev_priv->saveVGA1 = I915_READ(VGA1);
	dev_priv->saveVGA_PD = I915_READ(VGA_PD);
	dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);

	/* Clock gating state */
	dev_priv->saveD_STATE = I915_READ(D_STATE);
	dev_priv->saveDSPCLK_GATE_D = I915_READ(DSPCLK_GATE_D);

	/* Cache mode state */
	dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);

	/* Memory Arbitration state */
	dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);

	/* Scratch space */
	for (i = 0; i < 16; i++) {
		dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
		dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
	}
	for (i = 0; i < 3; i++)
		dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));

	/* Fences */
	if (IS_I965G(dev)) {
//.........这里部分代码省略.........

int i915_restore_state(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;

#if defined(__FreeBSD__) || defined(__DragonFly__)
	pci_write_config(dev->device, LBB, dev_priv->saveLBB, 1);
#else
	pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
#endif

	/* Render Standby */
	if (IS_I965G(dev) && IS_MOBILE(dev))
		I915_WRITE(MCHBAR_RENDER_STANDBY, dev_priv->saveRENDERSTANDBY);

	/* Hardware status page */
	I915_WRITE(HWS_PGA, dev_priv->saveHWS);

	/* Display arbitration */
	I915_WRITE(DSPARB, dev_priv->saveDSPARB);

	/* Pipe & plane A info */
	/* Prime the clock */
	if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
		I915_WRITE(DPLL_A, dev_priv->saveDPLL_A &
			   ~DPLL_VCO_ENABLE);
		DRM_UDELAY(150);
	}
	I915_WRITE(FPA0, dev_priv->saveFPA0);
	I915_WRITE(FPA1, dev_priv->saveFPA1);
	/* Actually enable it */
	I915_WRITE(DPLL_A, dev_priv->saveDPLL_A);
	DRM_UDELAY(150);
	if (IS_I965G(dev))
		I915_WRITE(DPLL_A_MD, dev_priv->saveDPLL_A_MD);
	DRM_UDELAY(150);

	/* Restore mode */
	I915_WRITE(HTOTAL_A, dev_priv->saveHTOTAL_A);
	I915_WRITE(HBLANK_A, dev_priv->saveHBLANK_A);
	I915_WRITE(HSYNC_A, dev_priv->saveHSYNC_A);
	I915_WRITE(VTOTAL_A, dev_priv->saveVTOTAL_A);
	I915_WRITE(VBLANK_A, dev_priv->saveVBLANK_A);
	I915_WRITE(VSYNC_A, dev_priv->saveVSYNC_A);
	I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);

	/* Restore plane info */
	I915_WRITE(DSPASIZE, dev_priv->saveDSPASIZE);
	I915_WRITE(DSPAPOS, dev_priv->saveDSPAPOS);
	I915_WRITE(PIPEASRC, dev_priv->savePIPEASRC);
	I915_WRITE(DSPAADDR, dev_priv->saveDSPAADDR);
	I915_WRITE(DSPASTRIDE, dev_priv->saveDSPASTRIDE);
	if (IS_I965G(dev)) {
		I915_WRITE(DSPASURF, dev_priv->saveDSPASURF);
		I915_WRITE(DSPATILEOFF, dev_priv->saveDSPATILEOFF);
	}

	I915_WRITE(PIPEACONF, dev_priv->savePIPEACONF);

	i915_restore_palette(dev, PIPE_A);
	/* Enable the plane */
	I915_WRITE(DSPACNTR, dev_priv->saveDSPACNTR);
	I915_WRITE(DSPAADDR, I915_READ(DSPAADDR));

	/* Pipe & plane B info */
	if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
		I915_WRITE(DPLL_B, dev_priv->saveDPLL_B &
			   ~DPLL_VCO_ENABLE);
		DRM_UDELAY(150);
	}
	I915_WRITE(FPB0, dev_priv->saveFPB0);
	I915_WRITE(FPB1, dev_priv->saveFPB1);
	/* Actually enable it */
	I915_WRITE(DPLL_B, dev_priv->saveDPLL_B);
	DRM_UDELAY(150);
	if (IS_I965G(dev))
		I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
	DRM_UDELAY(150);

	/* Restore mode */
	I915_WRITE(HTOTAL_B, dev_priv->saveHTOTAL_B);
	I915_WRITE(HBLANK_B, dev_priv->saveHBLANK_B);
	I915_WRITE(HSYNC_B, dev_priv->saveHSYNC_B);
	I915_WRITE(VTOTAL_B, dev_priv->saveVTOTAL_B);
	I915_WRITE(VBLANK_B, dev_priv->saveVBLANK_B);
	I915_WRITE(VSYNC_B, dev_priv->saveVSYNC_B);
	I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);

	/* Restore plane info */
	I915_WRITE(DSPBSIZE, dev_priv->saveDSPBSIZE);
	I915_WRITE(DSPBPOS, dev_priv->saveDSPBPOS);
	I915_WRITE(PIPEBSRC, dev_priv->savePIPEBSRC);
	I915_WRITE(DSPBADDR, dev_priv->saveDSPBADDR);
	I915_WRITE(DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
	if (IS_I965G(dev)) {
		I915_WRITE(DSPBSURF, dev_priv->saveDSPBSURF);
		I915_WRITE(DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
	}

	I915_WRITE(PIPEBCONF, dev_priv->savePIPEBCONF);
//.........这里部分代码省略.........

int i915_restore_state(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;

	pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);

	/* Render Standby */
	if (IS_I965G(dev) && IS_MOBILE(dev))
		I915_WRITE(MCHBAR_RENDER_STANDBY, dev_priv->saveRENDERSTANDBY);

	/* Hardware status page */
	I915_WRITE(HWS_PGA, dev_priv->saveHWS);

	/* Display arbitration */
	I915_WRITE(DSPARB, dev_priv->saveDSPARB);

	/* Fences */
	if (IS_I965G(dev)) {
		for (i = 0; i < 16; i++)
			I915_WRITE64(FENCE_REG_965_0 + (i * 8), dev_priv->saveFENCE[i]);
	} else {
		for (i = 0; i < 8; i++)
			I915_WRITE(FENCE_REG_830_0 + (i * 4), dev_priv->saveFENCE[i]);
		if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
			for (i = 0; i < 8; i++)
				I915_WRITE(FENCE_REG_945_8 + (i * 4), dev_priv->saveFENCE[i+8]);
	}
	
	/* Display port ratios (must be done before clock is set) */
	if (SUPPORTS_INTEGRATED_DP(dev)) {
		I915_WRITE(PIPEA_GMCH_DATA_M, dev_priv->savePIPEA_GMCH_DATA_M);
		I915_WRITE(PIPEB_GMCH_DATA_M, dev_priv->savePIPEB_GMCH_DATA_M);
		I915_WRITE(PIPEA_GMCH_DATA_N, dev_priv->savePIPEA_GMCH_DATA_N);
		I915_WRITE(PIPEB_GMCH_DATA_N, dev_priv->savePIPEB_GMCH_DATA_N);
		I915_WRITE(PIPEA_DP_LINK_M, dev_priv->savePIPEA_DP_LINK_M);
		I915_WRITE(PIPEB_DP_LINK_M, dev_priv->savePIPEB_DP_LINK_M);
		I915_WRITE(PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
		I915_WRITE(PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
	}
	/* This is only meaningful in non-KMS mode */
	/* Don't restore them in KMS mode */
	i915_restore_modeset_reg(dev);
	/* Cursor state */
	I915_WRITE(CURAPOS, dev_priv->saveCURAPOS);
	I915_WRITE(CURACNTR, dev_priv->saveCURACNTR);
	I915_WRITE(CURABASE, dev_priv->saveCURABASE);
	I915_WRITE(CURBPOS, dev_priv->saveCURBPOS);
	I915_WRITE(CURBCNTR, dev_priv->saveCURBCNTR);
	I915_WRITE(CURBBASE, dev_priv->saveCURBBASE);
	if (!IS_I9XX(dev))
		I915_WRITE(CURSIZE, dev_priv->saveCURSIZE);

	/* CRT state */
	I915_WRITE(ADPA, dev_priv->saveADPA);

	/* LVDS state */
	if (IS_I965G(dev))
		I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
	if (IS_MOBILE(dev) && !IS_I830(dev))
		I915_WRITE(LVDS, dev_priv->saveLVDS);
	if (!IS_I830(dev) && !IS_845G(dev))
		I915_WRITE(PFIT_CONTROL, dev_priv->savePFIT_CONTROL);

	I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
	I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
	I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
	I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
	I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
	I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);

	/* Display Port state */
	if (SUPPORTS_INTEGRATED_DP(dev)) {
		I915_WRITE(DP_B, dev_priv->saveDP_B);
		I915_WRITE(DP_C, dev_priv->saveDP_C);
		I915_WRITE(DP_D, dev_priv->saveDP_D);
	}
	/* FIXME: restore TV & SDVO state */

	/* FBC info */
	I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
	I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
	I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
	I915_WRITE(FBC_CONTROL, dev_priv->saveFBC_CONTROL);

	/* VGA state */
	I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
	I915_WRITE(VGA0, dev_priv->saveVGA0);
	I915_WRITE(VGA1, dev_priv->saveVGA1);
	I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
	DRM_UDELAY(150);

	/* Clock gating state */
	I915_WRITE (D_STATE, dev_priv->saveD_STATE);
	I915_WRITE (DSPCLK_GATE_D, dev_priv->saveDSPCLK_GATE_D);

	/* Cache mode state */
	I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);

	/* Memory arbitration state */
//.........这里部分代码省略.........

int i915_save_state(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;

#if defined(__FreeBSD__) || defined(__DragonFly__)
	dev_priv->saveLBB = (u8) pci_read_config(dev->device, LBB, 1);
#else
	pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
#endif

	/* Render Standby */
	if (IS_I965G(dev) && IS_MOBILE(dev))
		dev_priv->saveRENDERSTANDBY = I915_READ(MCHBAR_RENDER_STANDBY);

	/* Hardware status page */
	dev_priv->saveHWS = I915_READ(HWS_PGA);

	/* Display arbitration control */
	dev_priv->saveDSPARB = I915_READ(DSPARB);

	/* Pipe & plane A info */
	dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
	dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
	dev_priv->saveFPA0 = I915_READ(FPA0);
	dev_priv->saveFPA1 = I915_READ(FPA1);
	dev_priv->saveDPLL_A = I915_READ(DPLL_A);
	if (IS_I965G(dev))
		dev_priv->saveDPLL_A_MD = I915_READ(DPLL_A_MD);
	dev_priv->saveHTOTAL_A = I915_READ(HTOTAL_A);
	dev_priv->saveHBLANK_A = I915_READ(HBLANK_A);
	dev_priv->saveHSYNC_A = I915_READ(HSYNC_A);
	dev_priv->saveVTOTAL_A = I915_READ(VTOTAL_A);
	dev_priv->saveVBLANK_A = I915_READ(VBLANK_A);
	dev_priv->saveVSYNC_A = I915_READ(VSYNC_A);
	dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);

	dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
	dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
	dev_priv->saveDSPASIZE = I915_READ(DSPASIZE);
	dev_priv->saveDSPAPOS = I915_READ(DSPAPOS);
	dev_priv->saveDSPAADDR = I915_READ(DSPAADDR);
	if (IS_I965G(dev)) {
		dev_priv->saveDSPASURF = I915_READ(DSPASURF);
		dev_priv->saveDSPATILEOFF = I915_READ(DSPATILEOFF);
	}
	i915_save_palette(dev, PIPE_A);
	dev_priv->savePIPEASTAT = I915_READ(PIPEASTAT);

	/* Pipe & plane B info */
	dev_priv->savePIPEBCONF = I915_READ(PIPEBCONF);
	dev_priv->savePIPEBSRC = I915_READ(PIPEBSRC);
	dev_priv->saveFPB0 = I915_READ(FPB0);
	dev_priv->saveFPB1 = I915_READ(FPB1);
	dev_priv->saveDPLL_B = I915_READ(DPLL_B);
	if (IS_I965G(dev))
		dev_priv->saveDPLL_B_MD = I915_READ(DPLL_B_MD);
	dev_priv->saveHTOTAL_B = I915_READ(HTOTAL_B);
	dev_priv->saveHBLANK_B = I915_READ(HBLANK_B);
	dev_priv->saveHSYNC_B = I915_READ(HSYNC_B);
	dev_priv->saveVTOTAL_B = I915_READ(VTOTAL_B);
	dev_priv->saveVBLANK_B = I915_READ(VBLANK_B);
	dev_priv->saveVSYNC_B = I915_READ(VSYNC_B);
	dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);

	dev_priv->saveDSPBCNTR = I915_READ(DSPBCNTR);
	dev_priv->saveDSPBSTRIDE = I915_READ(DSPBSTRIDE);
	dev_priv->saveDSPBSIZE = I915_READ(DSPBSIZE);
	dev_priv->saveDSPBPOS = I915_READ(DSPBPOS);
	dev_priv->saveDSPBADDR = I915_READ(DSPBADDR);
	if (IS_I965GM(dev) || IS_GM45(dev)) {
		dev_priv->saveDSPBSURF = I915_READ(DSPBSURF);
		dev_priv->saveDSPBTILEOFF = I915_READ(DSPBTILEOFF);
	}
	i915_save_palette(dev, PIPE_B);
	dev_priv->savePIPEBSTAT = I915_READ(PIPEBSTAT);

	/* CRT state */
	dev_priv->saveADPA = I915_READ(ADPA);

	/* LVDS state */
	dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
	dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
	if (IS_I965G(dev))
		dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
	if (IS_MOBILE(dev) && !IS_I830(dev))
		dev_priv->saveLVDS = I915_READ(LVDS);
	if (!IS_I830(dev) && !IS_845G(dev))
		dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
	dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
	dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
	dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);

	/* FIXME: save TV & SDVO state */

	/* FBC state */
	dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
	dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
	dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
//.........这里部分代码省略.........

static int i915_gem_object_get_pages_internal(struct drm_i915_gem_object *obj)
{
	struct drm_i915_private *i915 = to_i915(obj->base.dev);
	struct sg_table *st;
	struct scatterlist *sg;
	unsigned int sg_page_sizes;
	unsigned int npages;
	int max_order;
	gfp_t gfp;

	max_order = MAX_ORDER;
#ifdef CONFIG_SWIOTLB
	if (swiotlb_nr_tbl()) {
		unsigned int max_segment;

		max_segment = swiotlb_max_segment();
		if (max_segment) {
			max_segment = max_t(unsigned int, max_segment,
					    PAGE_SIZE) >> PAGE_SHIFT;
			max_order = min(max_order, ilog2(max_segment));
		}
	}
#endif

	gfp = GFP_KERNEL | __GFP_HIGHMEM | __GFP_RECLAIMABLE;
	if (IS_I965GM(i915) || IS_I965G(i915)) {
		/* 965gm cannot relocate objects above 4GiB. */
		gfp &= ~__GFP_HIGHMEM;
		gfp |= __GFP_DMA32;
	}

create_st:
	st = kmalloc(sizeof(*st), GFP_KERNEL);
	if (!st)
		return -ENOMEM;

	npages = obj->base.size / PAGE_SIZE;
	if (sg_alloc_table(st, npages, GFP_KERNEL)) {
		kfree(st);
		return -ENOMEM;
	}

	sg = st->sgl;
	st->nents = 0;
	sg_page_sizes = 0;

	do {
		int order = min(fls(npages) - 1, max_order);
		struct page *page;

		do {
			page = alloc_pages(gfp | (order ? QUIET : MAYFAIL),
					   order);
			if (page)
				break;
			if (!order--)
				goto err;

			/* Limit subsequent allocations as well */
			max_order = order;
		} while (1);

		sg_set_page(sg, page, PAGE_SIZE << order, 0);
		sg_page_sizes |= PAGE_SIZE << order;
		st->nents++;

		npages -= 1 << order;
		if (!npages) {
			sg_mark_end(sg);
			break;
		}

		sg = __sg_next(sg);
	} while (1);

	if (i915_gem_gtt_prepare_pages(obj, st)) {
		/* Failed to dma-map try again with single page sg segments */
		if (get_order(st->sgl->length)) {
			internal_free_pages(st);
			max_order = 0;
			goto create_st;
		}
		goto err;
	}

	/* Mark the pages as dontneed whilst they are still pinned. As soon
	 * as they are unpinned they are allowed to be reaped by the shrinker,
	 * and the caller is expected to repopulate - the contents of this
	 * object are only valid whilst active and pinned.
	 */
	obj->mm.m