Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "This updated pull request does not contain the last few GIC related
  patches which were reported to cause a regression.  There is a fix
  available, but I let it breed for a couple of days first.

  The irq departement provides:

   - new infrastructure to support non PCI based MSI interrupts
   - a couple of new irq chip drivers
   - the usual pile of fixlets and updates to irq chip drivers
   - preparatory changes for removal of the irq argument from interrupt
     flow handlers
   - preparatory changes to remove IRQF_VALID"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits)
  irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources
  irqchip: Add bcm2836 interrupt controller for Raspberry Pi 2
  irqchip: Add documentation for the bcm2836 interrupt controller
  irqchip/bcm2835: Add support for being used as a second level controller
  irqchip/bcm2835: Refactor handle_IRQ() calls out of MAKE_HWIRQ
  PCI: xilinx: Fix typo in function name
  irqchip/gic: Ensure gic_cpu_if_up/down() programs correct GIC instance
  irqchip/gic: Only allow the primary GIC to set the CPU map
  PCI/MSI: pci-xgene-msi: Consolidate chained IRQ handler install/remove
  unicore32/irq: Prepare puv3_gpio_handler for irq argument removal
  tile/pci_gx: Prepare trio_handle_level_irq for irq argument removal
  m68k/irq: Prepare irq handlers for irq argument removal
  C6X/megamode-pic: Prepare megamod_irq_cascade for irq argument removal
  blackfin: Prepare irq handlers for irq argument removal
  arc/irq: Prepare idu_cascade_isr for irq argument removal
  sparc/irq: Use access helper irq_data_get_affinity_mask()
  sparc/irq: Use helper irq_data_get_irq_handler_data()
  parisc/irq: Use access helper irq_data_get_affinity_mask()
  mn10300/irq: Use access helper irq_data_get_affinity_mask()
  irqchip/i8259: Prepare i8259_irq_dispatch for irq argument removal
  ...

9 files changed, 181 insertions, 109 deletions

diff --git a/drivers/pci/host/pci-keystone-dw.c b/drivers/pci/host/pci-keystone-dw.c
index f1d0749ebbf0..e71da991949b 100644
--- a/drivers/pci/host/pci-keystone-dw.c
+++ b/drivers/pci/host/pci-keystone-dw.c
@@ -104,14 +104,13 @@ static void ks_dw_pcie_msi_irq_ack(struct irq_data *d)
 {
 	u32 offset, reg_offset, bit_pos;
 	struct keystone_pcie *ks_pcie;
-	unsigned int irq = d->irq;
 	struct msi_desc *msi;
 	struct pcie_port *pp;
 
-	msi = irq_get_msi_desc(irq);
-	pp = sys_to_pcie(msi->dev->bus->sysdata);
+	msi = irq_data_get_msi_desc(d);
+	pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
 	ks_pcie = to_keystone_pcie(pp);
-	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
+	offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
 	update_reg_offset_bit_pos(offset, &reg_offset, &bit_pos);
 
 	writel(BIT(bit_pos),
@@ -142,15 +141,14 @@ void ks_dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
 static void ks_dw_pcie_msi_irq_mask(struct irq_data *d)
 {
 	struct keystone_pcie *ks_pcie;
-	unsigned int irq = d->irq;
 	struct msi_desc *msi;
 	struct pcie_port *pp;
 	u32 offset;
 
-	msi = irq_get_msi_desc(irq);
-	pp = sys_to_pcie(msi->dev->bus->sysdata);
+	msi = irq_data_get_msi_desc(d);
+	pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
 	ks_pcie = to_keystone_pcie(pp);
-	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
+	offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
 
 	/* Mask the end point if PVM implemented */
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
@@ -164,15 +162,14 @@ static void ks_dw_pcie_msi_irq_mask(struct irq_data *d)
 static void ks_dw_pcie_msi_irq_unmask(struct irq_data *d)
 {
 	struct keystone_pcie *ks_pcie;
-	unsigned int irq = d->irq;
 	struct msi_desc *msi;
 	struct pcie_port *pp;
 	u32 offset;
 
-	msi = irq_get_msi_desc(irq);
-	pp = sys_to_pcie(msi->dev->bus->sysdata);
+	msi = irq_data_get_msi_desc(d);
+	pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
 	ks_pcie = to_keystone_pcie(pp);
-	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
+	offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
 
 	/* Mask the end point if PVM implemented */
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c
index 734da589cdfb..81253e70b1c5 100644
--- a/drivers/pci/host/pci-keystone.c
+++ b/drivers/pci/host/pci-keystone.c
@@ -110,8 +110,9 @@ static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
 	return -EINVAL;
 }
 
-static void ks_pcie_msi_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void ks_pcie_msi_irq_handler(unsigned int __irq, struct irq_desc *desc)
 {
+	unsigned int irq = irq_desc_get_irq(desc);
 	struct keystone_pcie *ks_pcie = irq_desc_get_handler_data(desc);
 	u32 offset = irq - ks_pcie->msi_host_irqs[0];
 	struct pcie_port *pp = &ks_pcie->pp;
@@ -137,8 +138,10 @@ static void ks_pcie_msi_irq_handler(unsigned int irq, struct irq_desc *desc)
  * Traverse through pending legacy interrupts and invoke handler for each. Also
  * takes care of interrupt controller level mask/ack operation.
  */
-static void ks_pcie_legacy_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void ks_pcie_legacy_irq_handler(unsigned int __irq,
+				       struct irq_desc *desc)
 {
+	unsigned int irq = irq_desc_get_irq(desc);
 	struct keystone_pcie *ks_pcie = irq_desc_get_handler_data(desc);
 	struct pcie_port *pp = &ks_pcie->pp;
 	u32 irq_offset = irq - ks_pcie->legacy_host_irqs[0];
@@ -212,9 +215,9 @@ static void ks_pcie_setup_interrupts(struct keystone_pcie *ks_pcie)
 
 	/* Legacy IRQ */
 	for (i = 0; i < ks_pcie->num_legacy_host_irqs; i++) {
-		irq_set_handler_data(ks_pcie->legacy_host_irqs[i], ks_pcie);
-		irq_set_chained_handler(ks_pcie->legacy_host_irqs[i],
-					ks_pcie_legacy_irq_handler);
+		irq_set_chained_handler_and_data(ks_pcie->legacy_host_irqs[i],
+						 ks_pcie_legacy_irq_handler,
+						 ks_pcie);
 	}
 	ks_dw_pcie_enable_legacy_irqs(ks_pcie);
 
diff --git a/drivers/pci/host/pci-xgene-msi.c b/drivers/pci/host/pci-xgene-msi.c
index 398c9bfe13a9..996327cfa1e1 100644
--- a/drivers/pci/host/pci-xgene-msi.c
+++ b/drivers/pci/host/pci-xgene-msi.c
@@ -40,8 +40,8 @@ struct xgene_msi_group {
 
 struct xgene_msi {
 	struct device_node	*node;
-	struct msi_controller	mchip;
-	struct irq_domain	*domain;
+	struct irq_domain	*inner_domain;
+	struct irq_domain	*msi_domain;
 	u64			msi_addr;
 	void __iomem		*msi_regs;
 	unsigned long		*bitmap;
@@ -251,17 +251,17 @@ static const struct irq_domain_ops msi_domain_ops = {
 
 static int xgene_allocate_domains(struct xgene_msi *msi)
 {
-	msi->domain = irq_domain_add_linear(NULL, NR_MSI_VEC,
-					    &msi_domain_ops, msi);
-	if (!msi->domain)
+	msi->inner_domain = irq_domain_add_linear(NULL, NR_MSI_VEC,
+						  &msi_domain_ops, msi);
+	if (!msi->inner_domain)
 		return -ENOMEM;
 
-	msi->mchip.domain = pci_msi_create_irq_domain(msi->mchip.of_node,
-						      &xgene_msi_domain_info,
-						      msi->domain);
+	msi->msi_domain = pci_msi_create_irq_domain(msi->node,
+						    &xgene_msi_domain_info,
+						    msi->inner_domain);
 
-	if (!msi->mchip.domain) {
-		irq_domain_remove(msi->domain);
+	if (!msi->msi_domain) {
+		irq_domain_remove(msi->inner_domain);
 		return -ENOMEM;
 	}
 
@@ -270,10 +270,10 @@ static int xgene_allocate_domains(struct xgene_msi *msi)
 
 static void xgene_free_domains(struct xgene_msi *msi)
 {
-	if (msi->mchip.domain)
-		irq_domain_remove(msi->mchip.domain);
-	if (msi->domain)
-		irq_domain_remove(msi->domain);
+	if (msi->msi_domain)
+		irq_domain_remove(msi->msi_domain);
+	if (msi->inner_domain)
+		irq_domain_remove(msi->inner_domain);
 }
 
 static int xgene_msi_init_allocator(struct xgene_msi *xgene_msi)
@@ -339,7 +339,7 @@ static void xgene_msi_isr(unsigned int irq, struct irq_desc *desc)
 			 * CPU0
 			 */
 			hw_irq = hwirq_to_canonical_hwirq(hw_irq);
-			virq = irq_find_mapping(xgene_msi->domain, hw_irq);
+			virq = irq_find_mapping(xgene_msi->inner_domain, hw_irq);
 			WARN_ON(!virq);
 			if (virq != 0)
 				generic_handle_irq(virq);
@@ -367,10 +367,8 @@ static int xgene_msi_remove(struct platform_device *pdev)
 
 	for (i = 0; i < NR_HW_IRQS; i++) {
 		virq = msi->msi_groups[i].gic_irq;
-		if (virq != 0) {
-			irq_set_chained_handler(virq, NULL);
-			irq_set_handler_data(virq, NULL);
-		}
+		if (virq != 0)
+			irq_set_chained_handler_and_data(virq, NULL, NULL);
 	}
 	kfree(msi->msi_groups);
 
@@ -420,8 +418,8 @@ static int xgene_msi_hwirq_alloc(unsigned int cpu)
 		}
 
 		if (err) {
-			irq_set_chained_handler(msi_group->gic_irq, NULL);
-			irq_set_handler_data(msi_group->gic_irq, NULL);
+			irq_set_chained_handler_and_data(msi_group->gic_irq,
+							 NULL, NULL);
 			return err;
 		}
 	}
@@ -440,8 +438,8 @@ static void xgene_msi_hwirq_free(unsigned int cpu)
 		if (!msi_group->gic_irq)
 			continue;
 
-		irq_set_chained_handler(msi_group->gic_irq, NULL);
-		irq_set_handler_data(msi_group->gic_irq, NULL);
+		irq_set_chained_handler_and_data(msi_group->gic_irq, NULL,
+						 NULL);
 	}
 }
 
@@ -496,7 +494,7 @@ static int xgene_msi_probe(struct platform_device *pdev)
 		goto error;
 	}
 	xgene_msi->msi_addr = res->start;
-
+	xgene_msi->node = pdev->dev.of_node;
 	xgene_msi->num_cpus = num_possible_cpus();
 
 	rc = xgene_msi_init_allocator(xgene_msi);
@@ -560,19 +558,10 @@ static int xgene_msi_probe(struct platform_device *pdev)
 
 	cpu_notifier_register_done();
 
-	xgene_msi->mchip.of_node = pdev->dev.of_node;
-	rc = of_pci_msi_chip_add(&xgene_msi->mchip);
-	if (rc) {
-		dev_err(&pdev->dev, "failed to add MSI controller chip\n");
-		goto error_notifier;
-	}
-
 	dev_info(&pdev->dev, "APM X-Gene PCIe MSI driver loaded\n");
 
 	return 0;
 
-error_notifier:
-	unregister_hotcpu_notifier(&xgene_msi_cpu_notifier);
 error:
 	xgene_msi_remove(pdev);
 	return rc;
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 8d52ce73f842..52aa6e34002b 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -255,7 +255,7 @@ static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
 static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
 {
 	int irq, pos0, i;
-	struct pcie_port *pp = sys_to_pcie(desc->dev->bus->sysdata);
+	struct pcie_port *pp = sys_to_pcie(msi_desc_to_pci_sysdata(desc));
 
 	pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
 				       order_base_2(no_irqs));
@@ -326,8 +326,8 @@ static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
 static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
 {
 	struct irq_data *data = irq_get_irq_data(irq);
-	struct msi_desc *msi = irq_data_get_msi(data);
-	struct pcie_port *pp = sys_to_pcie(msi->dev->bus->sysdata);
+	struct msi_desc *msi = irq_data_get_msi_desc(data);
+	struct pcie_port *pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
 
 	clear_irq_range(pp, irq, 1, data->hwirq);
 }
diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
index 1aeaa914bd30..3c7a0d580b1e 100644
--- a/drivers/pci/host/pcie-xilinx.c
+++ b/drivers/pci/host/pcie-xilinx.c
@@ -227,18 +227,16 @@ static struct pci_ops xilinx_pcie_ops = {
  */
 static void xilinx_pcie_destroy_msi(unsigned int irq)
 {
-	struct irq_desc *desc;
 	struct msi_desc *msi;
 	struct xilinx_pcie_port *port;
 
-	desc = irq_to_desc(irq);
-	msi = irq_desc_get_msi_desc(desc);
-	port = sys_to_pcie(msi->dev->bus->sysdata);
-
-	if (!test_bit(irq, msi_irq_in_use))
+	if (!test_bit(irq, msi_irq_in_use)) {
+		msi = irq_get_msi_desc(irq);
+		port = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
 		dev_err(port->dev, "Trying to free unused MSI#%d\n", irq);
-	else
+	} else {
 		clear_bit(irq, msi_irq_in_use);
+	}
 }
 
 /**
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 2f9b1c0d1f96..d4497141d083 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -39,14 +39,13 @@ struct irq_domain * __weak arch_get_pci_msi_domain(struct pci_dev *dev)
 
 static struct irq_domain *pci_msi_get_domain(struct pci_dev *dev)
 {
-	struct irq_domain *domain = NULL;
+	struct irq_domain *domain;
 
-	if (dev->bus->msi)
-		domain = dev->bus->msi->domain;
-	if (!domain)
-		domain = arch_get_pci_msi_domain(dev);
+	domain = dev_get_msi_domain(&dev->dev);
+	if (domain)
+		return domain;
 
-	return domain;
+	return arch_get_pci_msi_domain(dev);
 }
 
 static int pci_msi_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
@@ -116,7 +115,7 @@ int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 	if (type == PCI_CAP_ID_MSI && nvec > 1)
 		return 1;
 
-	list_for_each_entry(entry, &dev->msi_list, list) {
+	for_each_pci_msi_entry(entry, dev) {
 		ret = arch_setup_msi_irq(dev, entry);
 		if (ret < 0)
 			return ret;
@@ -136,7 +135,7 @@ void default_teardown_msi_irqs(struct pci_dev *dev)
 	int i;
 	struct msi_desc *entry;
 
-	list_for_each_entry(entry, &dev->msi_list, list)
+	for_each_pci_msi_entry(entry, dev)
 		if (entry->irq)
 			for (i = 0; i < entry->nvec_used; i++)
 				arch_teardown_msi_irq(entry->irq + i);
@@ -153,7 +152,7 @@ static void default_restore_msi_irq(struct pci_dev *dev, int irq)
 
 	entry = NULL;
 	if (dev->msix_enabled) {
-		list_for_each_entry(entry, &dev->msi_list, list) {
+		for_each_pci_msi_entry(entry, dev) {
 			if (irq == entry->irq)
 				break;
 		}
@@ -193,7 +192,8 @@ u32 __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag)
 
 	mask_bits &= ~mask;
 	mask_bits |= flag;
-	pci_write_config_dword(desc->dev, desc->mask_pos, mask_bits);
+	pci_write_config_dword(msi_desc_to_pci_dev(desc), desc->mask_pos,
+			       mask_bits);
 
 	return mask_bits;
 }
@@ -234,7 +234,7 @@ static void msix_mask_irq(struct msi_desc *desc, u32 flag)
 
 static void msi_set_mask_bit(struct irq_data *data, u32 flag)
 {
-	struct msi_desc *desc = irq_data_get_msi(data);
+	struct msi_desc *desc = irq_data_get_msi_desc(data);
 
 	if (desc->msi_attrib.is_msix) {
 		msix_mask_irq(desc, flag);
@@ -267,13 +267,15 @@ void default_restore_msi_irqs(struct pci_dev *dev)
 {
 	struct msi_desc *entry;
 
-	list_for_each_entry(entry, &dev->msi_list, list)
+	for_each_pci_msi_entry(entry, dev)
 		default_restore_msi_irq(dev, entry->irq);
 }
 
 void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 {
-	BUG_ON(entry->dev->current_state != PCI_D0);
+	struct pci_dev *dev = msi_desc_to_pci_dev(entry);
+
+	BUG_ON(dev->current_state != PCI_D0);
 
 	if (entry->msi_attrib.is_msix) {
 		void __iomem *base = entry->mask_base +
@@ -283,7 +285,6 @@ void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 		msg->address_hi = readl(base + PCI_MSIX_ENTRY_UPPER_ADDR);
 		msg->data = readl(base + PCI_MSIX_ENTRY_DATA);
 	} else {
-		struct pci_dev *dev = entry->dev;
 		int pos = dev->msi_cap;
 		u16 data;
 
@@ -303,7 +304,9 @@ void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 
 void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 {
-	if (entry->dev->current_state != PCI_D0) {
+	struct pci_dev *dev = msi_desc_to_pci_dev(entry);
+
+	if (dev->current_state != PCI_D0) {
 		/* Don't touch the hardware now */
 	} else if (entry->msi_attrib.is_msix) {
 		void __iomem *base;
@@ -314,7 +317,6 @@ void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 		writel(msg->address_hi, base + PCI_MSIX_ENTRY_UPPER_ADDR);
 		writel(msg->data, base + PCI_MSIX_ENTRY_DATA);
 	} else {
-		struct pci_dev *dev = entry->dev;
 		int pos = dev->msi_cap;
 		u16 msgctl;
 
@@ -348,21 +350,22 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg);
 
 static void free_msi_irqs(struct pci_dev *dev)
 {
+	struct list_head *msi_list = dev_to_msi_list(&dev->dev);
 	struct msi_desc *entry, *tmp;
 	struct attribute **msi_attrs;
 	struct device_attribute *dev_attr;
 	int i, count = 0;
 
-	list_for_each_entry(entry, &dev->msi_list, list)
+	for_each_pci_msi_entry(entry, dev)
 		if (entry->irq)
 			for (i = 0; i < entry->nvec_used; i++)
 				BUG_ON(irq_has_action(entry->irq + i));
 
 	pci_msi_teardown_msi_irqs(dev);
 
-	list_for_each_entry_safe(entry, tmp, &dev->msi_list, list) {
+	list_for_each_entry_safe(entry, tmp, msi_list, list) {
 		if (entry->msi_attrib.is_msix) {
-			if (list_is_last(&entry->list, &dev->msi_list))
+			if (list_is_last(&entry->list, msi_list))
 				iounmap(entry->mask_base);
 		}
 
@@ -387,18 +390,6 @@ static void free_msi_irqs(struct pci_dev *dev)
 	}
 }
 
-static struct msi_desc *alloc_msi_entry(struct pci_dev *dev)
-{
-	struct msi_desc *desc = kzalloc(sizeof(*desc), GFP_KERNEL);
-	if (!desc)
-		return NULL;
-
-	INIT_LIST_HEAD(&desc->list);
-	desc->dev = dev;
-
-	return desc;
-}
-
 static void pci_intx_for_msi(struct pci_dev *dev, int enable)
 {
 	if (!(dev->dev_flags & PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG))
@@ -433,7 +424,7 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
 
 	if (!dev->msix_enabled)
 		return;
-	BUG_ON(list_empty(&dev->msi_list));
+	BUG_ON(list_empty(dev_to_msi_list(&dev->dev)));
 
 	/* route the table */
 	pci_intx_for_msi(dev, 0);
@@ -441,7 +432,7 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
 				PCI_MSIX_FLAGS_ENABLE | PCI_MSIX_FLAGS_MASKALL);
 
 	arch_restore_msi_irqs(dev);
-	list_for_each_entry(entry, &dev->msi_list, list)
+	for_each_pci_msi_entry(entry, dev)
 		msix_mask_irq(entry, entry->masked);
 
 	pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
@@ -486,7 +477,7 @@ static int populate_msi_sysfs(struct pci_dev *pdev)
 	int count = 0;
 
 	/* Determine how many msi entries we have */
-	list_for_each_entry(entry, &pdev->msi_list, list)
+	for_each_pci_msi_entry(entry, pdev)
 		++num_msi;
 	if (!num_msi)
 		return 0;
@@ -495,7 +486,7 @@ static int populate_msi_sysfs(struct pci_dev *pdev)
 	msi_attrs = kzalloc(sizeof(void *) * (num_msi + 1), GFP_KERNEL);
 	if (!msi_attrs)
 		return -ENOMEM;
-	list_for_each_entry(entry, &pdev->msi_list, list) {
+	for_each_pci_msi_entry(entry, pdev) {
 		msi_dev_attr = kzalloc(sizeof(*msi_dev_attr), GFP_KERNEL);
 		if (!msi_dev_attr)
 			goto error_attrs;
@@ -553,7 +544,7 @@ static struct msi_desc *msi_setup_entry(struct pci_dev *dev, int nvec)
 	struct msi_desc *entry;
 
 	/* MSI Entry Initialization */
-	entry = alloc_msi_entry(dev);
+	entry = alloc_msi_entry(&dev->dev);
 	if (!entry)
 		return NULL;
 
@@ -584,7 +575,7 @@ static int msi_verify_entries(struct pci_dev *dev)
 {
 	struct msi_desc *entry;
 
-	list_for_each_entry(entry, &dev->msi_list, list) {
+	for_each_pci_msi_entry(entry, dev) {
 		if (!dev->no_64bit_msi || !entry->msg.address_hi)
 			continue;
 		dev_err(&dev->dev, "Device has broken 64-bit MSI but arch"
@@ -621,7 +612,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
 	mask = msi_mask(entry->msi_attrib.multi_cap);
 	msi_mask_irq(entry, mask, mask);
 
-	list_add_tail(&entry->list, &dev->msi_list);
+	list_add_tail(&entry->list, dev_to_msi_list(&dev->dev));
 
 	/* Configure MSI capability structure */
 	ret = pci_msi_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
@@ -682,7 +673,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
 	int i;
 
 	for (i = 0; i < nvec; i++) {
-		entry = alloc_msi_entry(dev);
+		entry = alloc_msi_entry(&dev->dev);
 		if (!entry) {
 			if (!i)
 				iounmap(base);
@@ -699,7 +690,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
 		entry->mask_base		= base;
 		entry->nvec_used		= 1;
 
-		list_add_tail(&entry->list, &dev->msi_list);
+		list_add_tail(&entry->list, dev_to_msi_list(&dev->dev));
 	}
 
 	return 0;
@@ -711,7 +702,7 @@ static void msix_program_entries(struct pci_dev *dev,
 	struct msi_desc *entry;
 	int i = 0;
 
-	list_for_each_entry(entry, &dev->msi_list, list) {
+	for_each_pci_msi_entry(entry, dev) {
 		int offset = entries[i].entry * PCI_MSIX_ENTRY_SIZE +
 						PCI_MSIX_ENTRY_VECTOR_CTRL;
 
@@ -792,7 +783,7 @@ out_avail:
 		struct msi_desc *entry;
 		int avail = 0;
 
-		list_for_each_entry(entry, &dev->msi_list, list) {
+		for_each_pci_msi_entry(entry, dev) {
 			if (entry->irq != 0)
 				avail++;
 		}
@@ -881,8 +872,8 @@ void pci_msi_shutdown(struct pci_dev *dev)
 	if (!pci_msi_enable || !dev || !dev->msi_enabled)
 		return;
 
-	BUG_ON(list_empty(&dev->msi_list));
-	desc = list_first_entry(&dev->msi_list, struct msi_desc, list);
+	BUG_ON(list_empty(dev_to_msi_list(&dev->dev)));
+	desc = first_pci_msi_entry(dev);
 
 	pci_msi_set_enable(dev, 0);
 	pci_intx_for_msi(dev, 1);
@@ -988,7 +979,7 @@ void pci_msix_shutdown(struct pci_dev *dev)
 		return;
 
 	/* Return the device with MSI-X masked as initial states */
-	list_for_each_entry(entry, &dev->msi_list, list) {
+	for_each_pci_msi_entry(entry, dev) {
 		/* Keep cached states to be restored */
 		__pci_msix_desc_mask_irq(entry, 1);
 	}
@@ -1028,7 +1019,6 @@ EXPORT_SYMBOL(pci_msi_enabled);
 
 void pci_msi_init_pci_dev(struct pci_dev *dev)
 {
-	INIT_LIST_HEAD(&dev->msi_list);
 }
 
 /**
@@ -1125,6 +1115,19 @@ int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
 }
 EXPORT_SYMBOL(pci_enable_msix_range);
 
+struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc)
+{
+	return to_pci_dev(desc->dev);
+}
+
+void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
+{
+	struct pci_dev *dev = msi_desc_to_pci_dev(desc);
+
+	return dev->bus->sysdata;
+}
+EXPORT_SYMBOL_GPL(msi_desc_to_pci_sysdata);
+
 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
 /**
  * pci_msi_domain_write_msg - Helper to write MSI message to PCI config space
@@ -1133,7 +1136,7 @@ EXPORT_SYMBOL(pci_enable_msix_range);
  */
 void pci_msi_domain_write_msg(struct irq_data *irq_data, struct msi_msg *msg)
 {
-	struct msi_desc *desc = irq_data->msi_desc;
+	struct msi_desc *desc = irq_data_get_msi_desc(irq_data);
 
 	/*
 	 * For MSI-X desc->irq is always equal to irq_data->irq. For
@@ -1257,12 +1260,19 @@ struct irq_domain *pci_msi_create_irq_domain(struct device_node *node,
 					     struct msi_domain_info *info,
 					     struct irq_domain *parent)
 {
+	struct irq_domain *domain;
+
 	if (info->flags & MSI_FLAG_USE_DEF_DOM_OPS)
 		pci_msi_domain_update_dom_ops(info);
 	if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
 		pci_msi_domain_update_chip_ops(info);
 
-	return msi_create_irq_domain(node, info, parent);
+	domain = msi_create_irq_domain(node, info, parent);
+	if (!domain)
+		return NULL;
+
+	domain->bus_token = DOMAIN_BUS_PCI_MSI;
+	return domain;
 }
 
 /**
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index f0929934bb7a..2e99a500cb83 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -9,6 +9,7 @@
  * 2 of the License, or (at your option) any later version.
  */
 
+#include <linux/irqdomain.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/of.h>
@@ -59,3 +60,32 @@ struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
 		return of_node_get(bus->bridge->parent->of_node);
 	return NULL;
 }
+
+struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus)
+{
+#ifdef CONFIG_IRQ_DOMAIN
+	struct device_node *np;
+	struct irq_domain *d;
+
+	if (!bus->dev.of_node)
+		return NULL;
+
+	/* Start looking for a phandle to an MSI controller. */
+	np = of_parse_phandle(bus->dev.of_node, "msi-parent", 0);
+
+	/*
+	 * If we don't have an msi-parent property, look for a domain
+	 * directly attached to the host bridge.
+	 */
+	if (!np)
+		np = bus->dev.of_node;
+
+	d = irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI);
+	if (d)
+		return d;
+
+	return irq_find_host(np);
+#else
+	return NULL;
+#endif
+}
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 04cfc60f7860..8177f3b04491 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -661,6 +661,35 @@ static void pci_set_bus_speed(struct pci_bus *bus)
 	}
 }
 
+static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus)
+{
+	struct irq_domain *d;
+
+	/*
+	 * Any firmware interface that can resolve the msi_domain
+	 * should be called from here.
+	 */
+	d = pci_host_bridge_of_msi_domain(bus);
+
+	return d;
+}
+
+static void pci_set_bus_msi_domain(struct pci_bus *bus)
+{
+	struct irq_domain *d;
+
+	/*
+	 * Either bus is the root, and we must obtain it from the
+	 * firmware, or we inherit it from the bridge device.
+	 */
+	if (pci_is_root_bus(bus))
+		d = pci_host_bridge_msi_domain(bus);
+	else
+		d = dev_get_msi_domain(&bus->self->dev);
+
+	dev_set_msi_domain(&bus->dev, d);
+}
+
 static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
 					   struct pci_dev *bridge, int busnr)
 {
@@ -714,6 +743,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
 	bridge->subordinate = child;
 
 add_dev:
+	pci_set_bus_msi_domain(child);
 	ret = device_register(&child->dev);
 	WARN_ON(ret < 0);
 
@@ -1594,6 +1624,17 @@ static void pci_init_capabilities(struct pci_dev *dev)
 	pci_enable_acs(dev);
 }
 
+static void pci_set_msi_domain(struct pci_dev *dev)
+{
+	/*
+	 * If no domain has been set through the pcibios_add_device
+	 * callback, inherit the default from the bus device.
+	 */
+	if (!dev_get_msi_domain(&dev->dev))
+		dev_set_msi_domain(&dev->dev,
+				   dev_get_msi_domain(&dev->bus->dev));
+}
+
 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 {
 	int ret;
@@ -1635,6 +1676,9 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 	ret = pcibios_add_device(dev);
 	WARN_ON(ret < 0);
 
+	/* Setup MSI irq domain */
+	pci_set_msi_domain(dev);
+
 	/* Notifier could use PCI capabilities */
 	dev->match_driver = false;
 	ret = device_add(&dev->dev);
@@ -2008,6 +2052,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
 	b->bridge = get_device(&bridge->dev);
 	device_enable_async_suspend(b->bridge);
 	pci_set_bus_of_node(b);
+	pci_set_bus_msi_domain(b);
 
 	if (!parent)
 		set_dev_node(b->bridge, pcibus_to_node(b));
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 8b7a900cd28b..c777b97207d5 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -265,7 +265,7 @@ static int pci_frontend_enable_msix(struct pci_dev *dev,
 	}
 
 	i = 0;
-	list_for_each_entry(entry, &dev->msi_list, list) {
+	for_each_pci_msi_entry(entry, dev) {
 		op.msix_entries[i].entry = entry->msi_attrib.entry_nr;
 		/* Vector is useless at this point. */
 		op.msix_entries[i].vector = -1;