From: Gavin Shan Date: Fri, 7 Sep 2012 22:44:02 +0000 (+0000) Subject: powerpc/eeh: Move EEH initialization around X-Git-Tag: accepted/tizen/common/20141203.182822~3675^2~70 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=35e5cfe27e674e4580408b34e7fc97e18460e048;p=platform%2Fkernel%2Flinux-arm64.git powerpc/eeh: Move EEH initialization around Currently, we have 3 phases for EEH initialization on pSeries platform. All of them are done through builtin functions: platform initialization, EEH device creation, and EEH subsystem enablement. All of them are done no later than ppc_md.setup_arch. That means that the slab/slub isn't ready yet, so we have to allocate memory chunks on basis of PAGE_SIZE for those dynamically created EEH devices. That's pretty expensive. In order to utilize slab/slub for memory allocation, we have to move the EEH initialization functions around, but all of them should be called after slab is ready. Signed-off-by: Gavin Shan Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index d60f998..06dedff 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -117,11 +117,6 @@ extern int eeh_subsystem_enabled; 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, @@ -156,17 +151,6 @@ 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; diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c index 179af90..140735c 100644 --- a/arch/powerpc/kernel/rtas_pci.c +++ b/arch/powerpc/kernel/rtas_pci.c @@ -275,9 +275,6 @@ void __init find_and_init_phbs(void) of_node_put(root); pci_devs_phb_init(); - /* Create EEH devices for all PHBs */ - eeh_dev_phb_init(); - /* * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties * in chosen. diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index ecd394c..e819448 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -982,7 +982,7 @@ int __exit eeh_ops_unregister(const char *name) * Even if force-off is set, the EEH hardware is still enabled, so that * newer systems can boot. */ -void __init eeh_init(void) +static int __init eeh_init(void) { struct pci_controller *hose, *tmp; struct device_node *phb; @@ -992,11 +992,11 @@ void __init eeh_init(void) if (!eeh_ops) { pr_warning("%s: Platform EEH operation not found\n", __func__); - return; + return -EEXIST; } else if ((ret = eeh_ops->init())) { pr_warning("%s: Failed to call platform init function (%d)\n", __func__, ret); - return; + return ret; } raw_spin_lock_init(&confirm_error_lock); @@ -1011,8 +1011,12 @@ void __init eeh_init(void) printk(KERN_INFO "EEH: PCI Enhanced I/O Error Handling Enabled\n"); else printk(KERN_WARNING "EEH: No capable adapters found\n"); + + return ret; } +core_initcall_sync(eeh_init); + /** * eeh_add_device_early - Enable EEH for the indicated device_node * @dn: device node for which to set up EEH diff --git a/arch/powerpc/platforms/pseries/eeh_dev.c b/arch/powerpc/platforms/pseries/eeh_dev.c index c4507d0..ab68c59 100644 --- a/arch/powerpc/platforms/pseries/eeh_dev.c +++ b/arch/powerpc/platforms/pseries/eeh_dev.c @@ -93,10 +93,14 @@ void __devinit eeh_dev_phb_init_dynamic(struct pci_controller *phb) * Scan all the existing PHBs and create EEH devices for their OF * nodes and their children OF nodes */ -void __init eeh_dev_phb_init(void) +static int __init eeh_dev_phb_init(void) { struct pci_controller *phb, *tmp; list_for_each_entry_safe(phb, tmp, &hose_list, list_node) eeh_dev_phb_init_dynamic(phb); + + return 0; } + +core_initcall(eeh_dev_phb_init); diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c index c33360ec..5e2805a 100644 --- a/arch/powerpc/platforms/pseries/eeh_pseries.c +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c @@ -559,7 +559,9 @@ static struct eeh_ops pseries_eeh_ops = { * EEH initialization on pseries platform. This function should be * called before any EEH related functions. */ -int __init eeh_pseries_init(void) +static int __init eeh_pseries_init(void) { return eeh_ops_register(&pseries_eeh_ops); } + +early_initcall(eeh_pseries_init); diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 36b7744..4a2cd48 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -388,10 +388,8 @@ static void __init pSeries_setup_arch(void) /* Find and initialize PCI host bridges */ init_pci_config_tokens(); - eeh_pseries_init(); find_and_init_phbs(); pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb); - eeh_init(); pSeries_nvram_init();