Merge remote-tracking branch 'master' into queue

Merge reason: development work has dependency on kvm patches merged
upstream.

Conflicts:
	arch/powerpc/include/asm/Kbuild
	arch/powerpc/include/asm/kvm_para.h

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 101 insertions, 40 deletions

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index d60f99814ff..b0ef73882b3 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -32,27 +32,62 @@ 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_INVALID	(1 << 0)	/* Invalid   */
+#define EEH_PE_PHB	(1 << 1)	/* PHB PE    */
+#define EEH_PE_DEVICE 	(1 << 2)	/* Device PE */
+#define EEH_PE_BUS	(1 << 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 +130,51 @@ 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
@@ -115,22 +182,26 @@ 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, int purge_pe);
+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 *);
+void eeh_remove_bus_device(struct pci_dev *, int);
 
 /**
  * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure.
@@ -156,34 +227,24 @@ 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_remove_bus_device(struct pci_dev *dev, int purge_pe) { }
+
+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 */