2 files changed, 43 insertions, 0 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 2a458279327a..2086cd1b5e0e 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -892,6 +892,34 @@ pci_disable_device(struct pci_dev *dev)
 }
 
 /**
+ * pcibios_set_pcie_reset_state - set reset state for device dev
+ * @dev: the PCI-E device reset
+ * @state: Reset state to enter into
+ *
+ *
+ * Sets the PCI-E reset state for the device. This is the default
+ * implementation. Architecture implementations can override this.
+ */
+int __attribute__ ((weak)) pcibios_set_pcie_reset_state(struct pci_dev *dev,
+                                                        enum pcie_reset_state state)
+{
+        return -EINVAL;
+}
+
+/**
+ * pci_set_pcie_reset_state - set reset state for device dev
+ * @dev: the PCI-E device reset
+ * @state: Reset state to enter into
+ *
+ *
+ * Sets the PCI reset state for the device.
+ */
+int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state)
+{
+        return pcibios_set_pcie_reset_state(dev, state);
+}
+
+/**
  * pci_enable_wake - enable PCI device as wakeup event source
  * @dev: PCI device affected
  * @state: PCI state from which device will issue wakeup events
@@ -1427,4 +1455,5 @@ EXPORT_SYMBOL(pci_set_power_state);
 EXPORT_SYMBOL(pci_save_state);
 EXPORT_SYMBOL(pci_restore_state);
 EXPORT_SYMBOL(pci_enable_wake);
+EXPORT_SYMBOL_GPL(pci_set_pcie_reset_state);
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 972491089ac9..3aba02a04792 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -96,6 +96,19 @@ enum pci_channel_state {
         pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
 };
 
+typedef unsigned int __bitwise pcie_reset_state_t;
+
+enum pcie_reset_state {
+        /* Reset is NOT asserted (Use to deassert reset) */
+        pcie_deassert_reset = (__force pcie_reset_state_t) 1,
+
+        /* Use #PERST to reset PCI-E device */
+        pcie_warm_reset = (__force pcie_reset_state_t) 2,
+
+        /* Use PCI-E Hot Reset to reset device */
+        pcie_hot_reset = (__force pcie_reset_state_t) 3
+};
+
 typedef unsigned short __bitwise pci_bus_flags_t;
 enum pci_bus_flags {
         PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
@@ -532,6 +545,7 @@ static inline int pci_is_managed(struct pci_dev *pdev)
 
 void pci_disable_device(struct pci_dev *dev);
 void pci_set_master(struct pci_dev *dev);
+int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
 #define HAVE_PCI_SET_MWI
 int __must_check pci_set_mwi(struct pci_dev *dev);
 void pci_clear_mwi(struct pci_dev *dev);