PCI: work around IvyBridge internal graphics FLR erratum

	return 0;

}

#include "../gpu/drm/i915/i915_reg.h"

#define MSG_CTL			0x45010

#define NSDE_PWR_STATE		0xd0100

#define IGD_OPERATION_TIMEOUT	10000     /* set timeout 10 seconds */

static int reset_ivb_igd(struct pci_dev *dev, int probe)

{

	void __iomem *mmio_base;

	unsigned long timeout;

	u32 val;

	if (probe)

		return 0;

	mmio_base = pci_iomap(dev, 0, 0);

	if (!mmio_base)

		return -ENOMEM;

	iowrite32(0x00000002, mmio_base + MSG_CTL);

	/*

	 * Clobbering SOUTH_CHICKEN2 register is fine only if the next

	 * driver loaded sets the right bits. However, this's a reset and

	 * the bits have been set by i915 previously, so we clobber

	 * SOUTH_CHICKEN2 register directly here.

	 */

	iowrite32(0x00000005, mmio_base + SOUTH_CHICKEN2);

	val = ioread32(mmio_base + PCH_PP_CONTROL) & 0xfffffffe;

	iowrite32(val, mmio_base + PCH_PP_CONTROL);

	timeout = jiffies + msecs_to_jiffies(IGD_OPERATION_TIMEOUT);

	do {

		val = ioread32(mmio_base + PCH_PP_STATUS);

		if ((val & 0xb0000000) == 0)

			goto reset_complete;

		msleep(10);

	} while (time_before(jiffies, timeout));

	dev_warn(&dev->dev, "timeout during reset\n");

reset_complete:

	iowrite32(0x00000002, mmio_base + NSDE_PWR_STATE);

	pci_iounmap(dev, mmio_base);

	return 0;

}

#define PCI_DEVICE_ID_INTEL_82599_SFP_VF   0x10ed

#define PCI_DEVICE_ID_INTEL_IVB_M_VGA      0x0156

#define PCI_DEVICE_ID_INTEL_IVB_M2_VGA     0x0166

static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {

	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF,

		 reset_intel_82599_sfp_virtfn },

	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M_VGA,

		reset_ivb_igd },

	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M2_VGA,

		reset_ivb_igd },

	{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID,

		reset_intel_generic_dev },

	{ 0 }

};

/*

 * These device-specific reset methods are here rather than in a driver

 * because when a host assigns a device to a guest VM, the host may need

 * to reset the device but probably doesn't have a driver for it.

 */

int pci_dev_specific_reset(struct pci_dev *dev, int probe)

{

	const struct pci_dev_reset_methods *i;