Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6-omap-h63xx.git] / include / linux / pci.h

diff --git a/include/linux/pci.h b/include/linux/pci.h
index de690ca73d580f06b37f1bcd8f9412bffa3981c2..0a44072383ec417647194cc505fb5e4d19447302 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -78,6 +78,23 @@ typedef int __bitwise pci_power_t;
 #define PCI_UNKNOWN    ((pci_power_t __force) 5)
 #define PCI_POWER_ERROR        ((pci_power_t __force) -1)
 
+/** The pci_channel state describes connectivity between the CPU and
+ *  the pci device.  If some PCI bus between here and the pci device
+ *  has crashed or locked up, this info is reflected here.
+ */
+typedef unsigned int __bitwise pci_channel_state_t;
+
+enum pci_channel_state {
+       /* I/O channel is in normal state */
+       pci_channel_io_normal = (__force pci_channel_state_t) 1,
+
+       /* I/O to channel is blocked */
+       pci_channel_io_frozen = (__force pci_channel_state_t) 2,
+
+       /* PCI card is dead */
+       pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
+};
+
 /*
  * The pci_dev structure is used to describe PCI devices.
  */
@@ -98,6 +115,7 @@ struct pci_dev {
        unsigned int    class;          /* 3 bytes: (base,sub,prog-if) */
        u8              hdr_type;       /* PCI header type (`multi' flag masked out) */
        u8              rom_base_reg;   /* which config register controls the ROM */
+       u8              pin;            /* which interrupt pin this device uses */
 
        struct pci_driver *driver;      /* which driver has allocated this device */
        u64             dma_mask;       /* Mask of the bits of bus address this
@@ -110,6 +128,7 @@ struct pci_dev {
                                           this is D0-D3, D0 being fully functional,
                                           and D3 being off. */
 
+       pci_channel_state_t error_state;        /* current connectivity state */
        struct  device  dev;            /* Generic device interface */
 
        /* device is compatible with these IDs */
@@ -232,6 +251,54 @@ struct pci_dynids {
        unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
 };
 
+/* ---------------------------------------------------------------- */
+/** PCI Error Recovery System (PCI-ERS).  If a PCI device driver provides
+ *  a set fof callbacks in struct pci_error_handlers, then that device driver
+ *  will be notified of PCI bus errors, and will be driven to recovery
+ *  when an error occurs.
+ */
+
+typedef unsigned int __bitwise pci_ers_result_t;
+
+enum pci_ers_result {
+       /* no result/none/not supported in device driver */
+       PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
+
+       /* Device driver can recover without slot reset */
+       PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
+
+       /* Device driver wants slot to be reset. */
+       PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
+
+       /* Device has completely failed, is unrecoverable */
+       PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
+
+       /* Device driver is fully recovered and operational */
+       PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
+};
+
+/* PCI bus error event callbacks */
+struct pci_error_handlers
+{
+       /* PCI bus error detected on this device */
+       pci_ers_result_t (*error_detected)(struct pci_dev *dev,
+                             enum pci_channel_state error);
+
+       /* MMIO has been re-enabled, but not DMA */
+       pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
+
+       /* PCI Express link has been reset */
+       pci_ers_result_t (*link_reset)(struct pci_dev *dev);
+
+       /* PCI slot has been reset */
+       pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
+
+       /* Device driver may resume normal operations */
+       void (*resume)(struct pci_dev *dev);
+};
+
+/* ---------------------------------------------------------------- */
+
 struct module;
 struct pci_driver {
        struct list_head node;
@@ -244,6 +311,7 @@ struct pci_driver {
        int  (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable);   /* Enable wake event */
        void (*shutdown) (struct pci_dev *dev);
 
+       struct pci_error_handlers *err_handler;
        struct device_driver    driver;
        struct pci_dynids dynids;
 };
@@ -448,6 +516,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass
 
 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
                  void *userdata);
+int pci_cfg_space_size(struct pci_dev *dev);
 
 /* kmem_cache style wrapper around pci_alloc_consistent() */