1 files changed, 57 insertions, 5 deletions

diff --git a/include/linux/pci.h b/include/linux/pci.h
index da05e5db06ac..f68c58a93dd0 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -102,6 +102,28 @@ enum {
         DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
 };
 
+/**
+ * enum pci_interrupt_pin - PCI INTx interrupt values
+ * @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt
+ * @PCI_INTERRUPT_INTA: PCI INTA pin
+ * @PCI_INTERRUPT_INTB: PCI INTB pin
+ * @PCI_INTERRUPT_INTC: PCI INTC pin
+ * @PCI_INTERRUPT_INTD: PCI INTD pin
+ *
+ * Corresponds to values for legacy PCI INTx interrupts, as can be found in the
+ * PCI_INTERRUPT_PIN register.
+ */
+enum pci_interrupt_pin {
+        PCI_INTERRUPT_UNKNOWN,
+        PCI_INTERRUPT_INTA,
+        PCI_INTERRUPT_INTB,
+        PCI_INTERRUPT_INTC,
+        PCI_INTERRUPT_INTD,
+};
+
+/* The number of legacy PCI INTx interrupts */
+#define PCI_NUM_INTX    4
+
 /*
  * pci_power_t values must match the bits in the Capabilities PME_Support
  * and Control/Status PowerState fields in the Power Management capability.
@@ -453,6 +475,7 @@ struct pci_host_bridge {
         void *release_data;
         struct msi_controller *msi;
         unsigned int ignore_reset_delay:1;      /* for entire hierarchy */
+        unsigned int no_ext_tags:1;             /* no Extended Tags */
         /* Resource alignment requirements */
         resource_size_t (*align_resource)(struct pci_dev *dev,
                         const struct resource *res,
@@ -847,7 +870,6 @@ char *pcibios_setup(char *str);
 resource_size_t pcibios_align_resource(void *, const struct resource *,
                                 resource_size_t,
                                 resource_size_t);
-void pcibios_update_irq(struct pci_dev *, int irq);
 
 /* Weak but can be overriden by arch */
 void pci_fixup_cardbus(struct pci_bus *);
@@ -1165,8 +1187,6 @@ void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
 void pdev_enable_device(struct pci_dev *);
 int pci_enable_resources(struct pci_dev *, int mask);
-void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
-                    int (*)(const struct pci_dev *, u8, u8));
 void pci_assign_irq(struct pci_dev *dev);
 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
 #define HAVE_PCI_REQ_REGIONS    2
@@ -1399,6 +1419,38 @@ pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
                                               NULL);
 }
 
+/**
+ * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
+ * @d: the INTx IRQ domain
+ * @node: the DT node for the device whose interrupt we're translating
+ * @intspec: the interrupt specifier data from the DT
+ * @intsize: the number of entries in @intspec
+ * @out_hwirq: pointer at which to write the hwirq number
+ * @out_type: pointer at which to write the interrupt type
+ *
+ * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
+ * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
+ * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
+ * INTx value to obtain the hwirq number.
+ *
+ * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
+ */
+static inline int pci_irqd_intx_xlate(struct irq_domain *d,
+                                      struct device_node *node,
+                                      const u32 *intspec,
+                                      unsigned int intsize,
+                                      unsigned long *out_hwirq,
+                                      unsigned int *out_type)
+{
+        const u32 intx = intspec[0];
+
+        if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
+                return -EINVAL;
+
+        *out_hwirq = intx - PCI_INTERRUPT_INTA;
+        return 0;
+}
+
 #ifdef CONFIG_PCIEPORTBUS
 extern bool pcie_ports_disabled;
 extern bool pcie_ports_auto;
@@ -2064,7 +2116,7 @@ static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
 
 /**
  * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
- * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
+ * @srdt: Pointer to the beginning of the Small Resource Data Type tag
  *
  * Returns the extracted Small Resource Data Type length.
  */
@@ -2075,7 +2127,7 @@ static inline u8 pci_vpd_srdt_size(const u8 *srdt)
 
 /**
  * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
- * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
+ * @srdt: Pointer to the beginning of the Small Resource Data Type tag
  *
  * Returns the extracted Small Resource Data Type Tag Item.
  */