Merge branch 'pci/virtualization' into next

* pci/virtualization:
  PCI: Disable VF decoding before pcibios_sriov_disable() updates resources
  PCI: Add ACS quirk for APM X-Gene devices
  PCI: Mark AMD Stoney GPU ATS as broken

Conflicts:
	drivers/pci/quirks.c

drivers/pci/iov.c

@@ -331,7 +331,6 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
 	while (i--)
 		pci_iov_remove_virtfn(dev, i, 0);
 
-	pcibios_sriov_disable(dev);
 err_pcibios:
 	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
 	pci_cfg_access_lock(dev);
@@ -339,6 +338,8 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
 	ssleep(1);
 	pci_cfg_access_unlock(dev);
 
+	pcibios_sriov_disable(dev);
+
 	if (iov->link != dev->devfn)
 		sysfs_remove_link(&dev->dev.kobj, "dep_link");
 
@@ -357,14 +358,14 @@ static void sriov_disable(struct pci_dev *dev)
 	for (i = 0; i < iov->num_VFs; i++)
 		pci_iov_remove_virtfn(dev, i, 0);
 
-	pcibios_sriov_disable(dev);
-
 	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
 	pci_cfg_access_lock(dev);
 	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
 	ssleep(1);
 	pci_cfg_access_unlock(dev);
 
+	pcibios_sriov_disable(dev);
+
 	if (iov->link != dev->devfn)
 		sysfs_remove_link(&dev->dev.kobj, "dep_link");
 

drivers/pci/quirks.c

@@ -4137,6 +4137,18 @@ static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags)
 	return acs_flags ? 0 : 1;
 }
 
+static int pci_quirk_xgene_acs(struct pci_dev *dev, u16 acs_flags)
+{
+	/*
+	 * X-Gene root matching this quirk do not allow peer-to-peer
+	 * transactions with others, allowing masking out these bits as if they
+	 * were unimplemented in the ACS capability.
+	 */
+	acs_flags &= ~(PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
+
+	return acs_flags ? 0 : 1;
+}
+
 /*
  * Many Intel PCH root ports do provide ACS-like features to disable peer
  * transactions and validate bus numbers in requests, but do not provide an
@@ -4385,6 +4397,8 @@ static const struct pci_dev_acs_enabled {
 	{ 0x10df, 0x720, pci_quirk_mf_endpoint_acs }, /* Emulex Skyhawk-R */
 	/* Cavium ThunderX */
 	{ PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, pci_quirk_cavium_acs },
+	/* APM X-Gene */
+	{ PCI_VENDOR_ID_AMCC, 0xE004, pci_quirk_xgene_acs },
 	{ 0 }
 };
 
@@ -4680,3 +4694,18 @@ static void quirk_no_ext_tags(struct pci_dev *pdev)
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0140, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0142, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0144, quirk_no_ext_tags);
+
+#ifdef CONFIG_PCI_ATS
+/*
+ * Some devices have a broken ATS implementation causing IOMMU stalls.
+ * Don't use ATS for those devices.
+ */
+static void quirk_no_ats(struct pci_dev *pdev)
+{
+	dev_info(&pdev->dev, "disabling ATS (broken on this device)\n");
+	pdev->ats_cap = 0;
+}
+
+/* AMD Stoney platform GPU */
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, quirk_no_ats);
+#endif /* CONFIG_PCI_ATS */