1 files changed, 98 insertions, 38 deletions

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index d60f99814ffb..58c5ee61e700 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -32,27 +32,61 @@ struct device_node;
 #ifdef CONFIG_EEH
 
 /*
+ * The struct is used to trace PE related EEH functionality.
+ * In theory, there will have one instance of the struct to
+ * be created against particular PE. In nature, PEs corelate
+ * to each other. the struct has to reflect that hierarchy in
+ * order to easily pick up those affected PEs when one particular
+ * PE has EEH errors.
+ *
+ * Also, one particular PE might be composed of PCI device, PCI
+ * bus and its subordinate components. The struct also need ship
+ * the information. Further more, one particular PE is only meaingful
+ * in the corresponding PHB. Therefore, the root PEs should be created
+ * against existing PHBs in on-to-one fashion.
+ */
+#define EEH_PE_PHB      1       /* PHB PE    */
+#define EEH_PE_DEVICE   2       /* Device PE */
+#define EEH_PE_BUS      3       /* Bus PE    */
+
+#define EEH_PE_ISOLATED         (1 << 0)        /* Isolated PE          */
+#define EEH_PE_RECOVERING       (1 << 1)        /* Recovering PE        */
+
+struct eeh_pe {
+        int type;                       /* PE type: PHB/Bus/Device      */
+        int state;                      /* PE EEH dependent mode        */
+        int config_addr;                /* Traditional PCI address      */
+        int addr;                       /* PE configuration address     */
+        struct pci_controller *phb;     /* Associated PHB               */
+        int check_count;                /* Times of ignored error       */
+        int freeze_count;               /* Times of froze up            */
+        int false_positives;            /* Times of reported #ff's      */
+        struct eeh_pe *parent;          /* Parent PE                    */
+        struct list_head child_list;    /* Link PE to the child list    */
+        struct list_head edevs;         /* Link list of EEH devices     */
+        struct list_head child;         /* Child PEs                    */
+};
+
+#define eeh_pe_for_each_dev(pe, edev) \
+                list_for_each_entry(edev, &pe->edevs, list)
+
+/*
  * The struct is used to trace EEH state for the associated
  * PCI device node or PCI device. In future, it might
  * represent PE as well so that the EEH device to form
  * another tree except the currently existing tree of PCI
  * buses and PCI devices
  */
-#define EEH_MODE_SUPPORTED      (1<<0)  /* EEH supported on the device  */
-#define EEH_MODE_NOCHECK        (1<<1)  /* EEH check should be skipped  */
-#define EEH_MODE_ISOLATED       (1<<2)  /* The device has been isolated */
-#define EEH_MODE_RECOVERING     (1<<3)  /* Recovering the device        */
-#define EEH_MODE_IRQ_DISABLED   (1<<4)  /* Interrupt disabled           */
+#define EEH_DEV_IRQ_DISABLED    (1<<0)  /* Interrupt disabled           */
 
 struct eeh_dev {
         int mode;                       /* EEH mode                     */
         int class_code;                 /* Class code of the device     */
         int config_addr;                /* Config address               */
         int pe_config_addr;             /* PE config address            */
-        int check_count;                /* Times of ignored error       */
-        int freeze_count;               /* Times of froze up            */
-        int false_positives;            /* Times of reported #ff's      */
         u32 config_space[16];           /* Saved PCI config space       */
+        struct eeh_pe *pe;              /* Associated PE                */
+        struct list_head list;          /* Form link list in the PE     */
         struct pci_controller *phb;     /* Associated PHB               */
         struct device_node *dn;         /* Associated device node       */
         struct pci_dev *pdev;           /* Associated PCI device        */
@@ -95,19 +129,51 @@ static inline struct pci_dev *eeh_dev_to_pci_dev(struct eeh_dev *edev)
 struct eeh_ops {
         char *name;
         int (*init)(void);
-        int (*set_option)(struct device_node *dn, int option);
-        int (*get_pe_addr)(struct device_node *dn);
-        int (*get_state)(struct device_node *dn, int *state);
-        int (*reset)(struct device_node *dn, int option);
-        int (*wait_state)(struct device_node *dn, int max_wait);
-        int (*get_log)(struct device_node *dn, int severity, char *drv_log, unsigned long len);
-        int (*configure_bridge)(struct device_node *dn);
+        void* (*of_probe)(struct device_node *dn, void *flag);
+        void* (*dev_probe)(struct pci_dev *dev, void *flag);
+        int (*set_option)(struct eeh_pe *pe, int option);
+        int (*get_pe_addr)(struct eeh_pe *pe);
+        int (*get_state)(struct eeh_pe *pe, int *state);
+        int (*reset)(struct eeh_pe *pe, int option);
+        int (*wait_state)(struct eeh_pe *pe, int max_wait);
+        int (*get_log)(struct eeh_pe *pe, int severity, char *drv_log, unsigned long len);
+        int (*configure_bridge)(struct eeh_pe *pe);
         int (*read_config)(struct device_node *dn, int where, int size, u32 *val);
         int (*write_config)(struct device_node *dn, int where, int size, u32 val);
 };
 
 extern struct eeh_ops *eeh_ops;
 extern int eeh_subsystem_enabled;
+extern struct mutex eeh_mutex;
+extern int eeh_probe_mode;
+
+#define EEH_PROBE_MODE_DEV      (1<<0)  /* From PCI device      */
+#define EEH_PROBE_MODE_DEVTREE  (1<<1)  /* From device tree     */
+
+static inline void eeh_probe_mode_set(int flag)
+{
+        eeh_probe_mode = flag;
+}
+
+static inline int eeh_probe_mode_devtree(void)
+{
+        return (eeh_probe_mode == EEH_PROBE_MODE_DEVTREE);
+}
+
+static inline int eeh_probe_mode_dev(void)
+{
+        return (eeh_probe_mode == EEH_PROBE_MODE_DEV);
+}
+
+static inline void eeh_lock(void)
+{
+        mutex_lock(&eeh_mutex);
+}
+
+static inline void eeh_unlock(void)
+{
+        mutex_unlock(&eeh_mutex);
+}
 
 /*
  * Max number of EEH freezes allowed before we consider the device
@@ -115,19 +181,23 @@ extern int eeh_subsystem_enabled;
  */
 #define EEH_MAX_ALLOWED_FREEZES 5
 
+typedef void *(*eeh_traverse_func)(void *data, void *flag);
+int __devinit eeh_phb_pe_create(struct pci_controller *phb);
+int eeh_add_to_parent_pe(struct eeh_dev *edev);
+int eeh_rmv_from_parent_pe(struct eeh_dev *edev);
+void *eeh_pe_dev_traverse(struct eeh_pe *root,
+                eeh_traverse_func fn, void *flag);
+void eeh_pe_restore_bars(struct eeh_pe *pe);
+struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe);
+
 void * __devinit eeh_dev_init(struct device_node *dn, void *data);
 void __devinit eeh_dev_phb_init_dynamic(struct pci_controller *phb);
-void __init eeh_dev_phb_init(void);
-void __init eeh_init(void);
-#ifdef CONFIG_PPC_PSERIES
-int __init eeh_pseries_init(void);
-#endif
 int __init eeh_ops_register(struct eeh_ops *ops);
 int __exit eeh_ops_unregister(const char *name);
 unsigned long eeh_check_failure(const volatile void __iomem *token,
                                 unsigned long val);
-int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev);
-void __init pci_addr_cache_build(void);
+int eeh_dev_check_failure(struct eeh_dev *edev);
+void __init eeh_addr_cache_build(void);
 void eeh_add_device_tree_early(struct device_node *);
 void eeh_add_device_tree_late(struct pci_bus *);
 void eeh_remove_bus_device(struct pci_dev *);
@@ -156,34 +226,24 @@ static inline void *eeh_dev_init(struct device_node *dn, void *data)
 
 static inline void eeh_dev_phb_init_dynamic(struct pci_controller *phb) { }
 
-static inline void eeh_dev_phb_init(void) { }
-
-static inline void eeh_init(void) { }
-
-#ifdef CONFIG_PPC_PSERIES
-static inline int eeh_pseries_init(void)
-{
-        return 0;
-}
-#endif /* CONFIG_PPC_PSERIES */
-
 static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val)
 {
         return val;
 }
 
-static inline int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
-{
-        return 0;
-}
+#define eeh_dev_check_failure(x) (0)
 
-static inline void pci_addr_cache_build(void) { }
+static inline void eeh_addr_cache_build(void) { }
 
 static inline void eeh_add_device_tree_early(struct device_node *dn) { }
 
 static inline void eeh_add_device_tree_late(struct pci_bus *bus) { }
 
 static inline void eeh_remove_bus_device(struct pci_dev *dev) { }
+
+static inline void eeh_lock(void) { }
+static inline void eeh_unlock(void) { }
+
 #define EEH_POSSIBLE_ERROR(val, type) (0)
 #define EEH_IO_ERROR_VALUE(size) (-1UL)
 #endif /* CONFIG_EEH */