diff options
| -rw-r--r-- | arch/powerpc/include/asm/eeh.h | 32 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh.c | 53 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_pseries.c | 183 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 1 |
5 files changed, 270 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index 232887721ff4..0666c52b8f14 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -31,6 +31,26 @@ struct device_node; #ifdef CONFIG_EEH +/* + * The struct is used to trace the registered EEH operation + * callback functions. Actually, those operation callback + * functions are heavily platform dependent. That means the + * platform should register its own EEH operation callback + * functions before any EEH further operations. + */ +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); +}; + +extern struct eeh_ops *eeh_ops; extern int eeh_subsystem_enabled; /* Values for eeh_mode bits in device_node */ @@ -47,6 +67,11 @@ extern int eeh_subsystem_enabled; #define EEH_MAX_ALLOWED_FREEZES 5 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); @@ -73,6 +98,13 @@ void eeh_remove_bus_device(struct pci_dev *); #else /* !CONFIG_EEH */ 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/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 67b3e6e0cf3f..ee873cf4fe46 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -6,7 +6,7 @@ obj-y := lpar.o hvCall.o nvram.o reconfig.o \ firmware.o power.o dlpar.o mobility.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_SCANLOG) += scanlog.o -obj-$(CONFIG_EEH) += eeh.o eeh_cache.o eeh_driver.o eeh_event.o eeh_sysfs.o +obj-$(CONFIG_EEH) += eeh.o eeh_cache.o eeh_driver.o eeh_event.o eeh_sysfs.o eeh_pseries.o obj-$(CONFIG_KEXEC) += kexec.o obj-$(CONFIG_PCI) += pci.o pci_dlpar.o obj-$(CONFIG_PSERIES_MSI) += msi.o diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index fa885891e1c3..b0e3fb0b32a5 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -97,6 +97,9 @@ static int ibm_get_config_addr_info2; static int ibm_configure_bridge; static int ibm_configure_pe; +/* Platform dependent EEH operations */ +struct eeh_ops *eeh_ops = NULL; + int eeh_subsystem_enabled; EXPORT_SYMBOL(eeh_subsystem_enabled); @@ -1208,6 +1211,56 @@ static void *eeh_early_enable(struct device_node *dn, void *data) } /** + * eeh_ops_register - Register platform dependent EEH operations + * @ops: platform dependent EEH operations + * + * Register the platform dependent EEH operation callback + * functions. The platform should call this function before + * any other EEH operations. + */ +int __init eeh_ops_register(struct eeh_ops *ops) +{ + if (!ops->name) { + pr_warning("%s: Invalid EEH ops name for %p\n", + __func__, ops); + return -EINVAL; + } + + if (eeh_ops && eeh_ops != ops) { + pr_warning("%s: EEH ops of platform %s already existing (%s)\n", + __func__, eeh_ops->name, ops->name); + return -EEXIST; + } + + eeh_ops = ops; + + return 0; +} + +/** + * eeh_ops_unregister - Unreigster platform dependent EEH operations + * @name: name of EEH platform operations + * + * Unregister the platform dependent EEH operation callback + * functions. + */ +int __exit eeh_ops_unregister(const char *name) +{ + if (!name || !strlen(name)) { + pr_warning("%s: Invalid EEH ops name\n", + __func__); + return -EINVAL; + } + + if (eeh_ops && !strcmp(eeh_ops->name, name)) { + eeh_ops = NULL; + return 0; + } + + return -EEXIST; +} + +/** * eeh_init - EEH initialization * * Initialize EEH by trying to enable it for all of the adapters in the system. diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c new file mode 100644 index 000000000000..61a9050ba969 --- /dev/null +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c @@ -0,0 +1,183 @@ +/* + * The file intends to implement the platform dependent EEH operations on pseries. + * Actually, the pseries platform is built based on RTAS heavily. That means the + * pseries platform dependent EEH operations will be built on RTAS calls. The functions + * are devired from arch/powerpc/platforms/pseries/eeh.c and necessary cleanup has + * been done. + * + * Copyright Benjamin Herrenschmidt & Gavin Shan, IBM Corporation 2011. + * Copyright IBM Corporation 2001, 2005, 2006 + * Copyright Dave Engebretsen & Todd Inglett 2001 + * Copyright Linas Vepstas 2005, 2006 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/atomic.h> +#include <linux/delay.h> +#include <linux/export.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/of.h> +#include <linux/pci.h> +#include <linux/proc_fs.h> +#include <linux/rbtree.h> +#include <linux/sched.h> +#include <linux/seq_file.h> +#include <linux/spinlock.h> + +#include <asm/eeh.h> +#include <asm/eeh_event.h> +#include <asm/io.h> +#include <asm/machdep.h> +#include <asm/ppc-pci.h> +#include <asm/rtas.h> + +/** + * pseries_eeh_init - EEH platform dependent initialization + * + * EEH platform dependent initialization on pseries. + */ +static int pseries_eeh_init(void) +{ + return 0; +} + +/** + * pseries_eeh_set_option - Initialize EEH or MMIO/DMA reenable + * @dn: device node + * @option: operation to be issued + * + * The function is used to control the EEH functionality globally. + * Currently, following options are support according to PAPR: + * Enable EEH, Disable EEH, Enable MMIO and Enable DMA + */ +static int pseries_eeh_set_option(struct device_node *dn, int option) +{ + return 0; +} + +/** + * pseries_eeh_get_pe_addr - Retrieve PE address + * @dn: device node + * + * Retrieve the assocated PE address. Actually, there're 2 RTAS + * function calls dedicated for the purpose. We need implement + * it through the new function and then the old one. Besides, + * you should make sure the config address is figured out from + * FDT node before calling the function. + * + * It's notable that zero'ed return value means invalid PE config + * address. + */ +static int pseries_eeh_get_pe_addr(struct device_node *dn) +{ + return 0; +} + +/** + * pseries_eeh_get_state - Retrieve PE state + * @dn: PE associated device node + * @state: return value + * + * Retrieve the state of the specified PE. On RTAS compliant + * pseries platform, there already has one dedicated RTAS function + * for the purpose. It's notable that the associated PE config address + * might be ready when calling the function. Therefore, endeavour to + * use the PE config address if possible. Further more, there're 2 + * RTAS calls for the purpose, we need to try the new one and back + * to the old one if the new one couldn't work properly. + */ +static int pseries_eeh_get_state(struct device_node *dn, int *state) +{ + return 0; +} + +/** + * pseries_eeh_reset - Reset the specified PE + * @dn: PE associated device node + * @option: reset option + * + * Reset the specified PE + */ +static int pseries_eeh_reset(struct device_node *dn, int option) +{ + return 0; +} + +/** + * pseries_eeh_wait_state - Wait for PE state + * @dn: PE associated device node + * @max_wait: maximal period in microsecond + * + * Wait for the state of associated PE. It might take some time + * to retrieve the PE's state. + */ +static int pseries_eeh_wait_state(struct device_node *dn, int max_wait) +{ + return 0; +} + +/** + * pseries_eeh_get_log - Retrieve error log + * @dn: device node + * @severity: temporary or permanent error log + * @drv_log: driver log to be combined with retrieved error log + * @len: length of driver log + * + * Retrieve the temporary or permanent error from the PE. + * Actually, the error will be retrieved through the dedicated + * RTAS call. + */ +static int pseries_eeh_get_log(struct device_node *dn, int severity, char *drv_log, unsigned long len) +{ + return 0; +} + +/** + * pseries_eeh_configure_bridge - Configure PCI bridges in the indicated PE + * @dn: PE associated device node + * + * The function will be called to reconfigure the bridges included + * in the specified PE so that the mulfunctional PE would be recovered + * again. + */ +static int pseries_eeh_configure_bridge(struct device_node *dn) +{ + return 0; +} + +static struct eeh_ops pseries_eeh_ops = { + .name = "pseries", + .init = pseries_eeh_init, + .set_option = pseries_eeh_set_option, + .get_pe_addr = pseries_eeh_get_pe_addr, + .get_state = pseries_eeh_get_state, + .reset = pseries_eeh_reset, + .wait_state = pseries_eeh_wait_state, + .get_log = pseries_eeh_get_log, + .configure_bridge = pseries_eeh_configure_bridge +}; + +/** + * eeh_pseries_init - Register platform dependent EEH operations + * + * EEH initialization on pseries platform. This function should be + * called before any EEH related functions. + */ +int __init eeh_pseries_init(void) +{ + return eeh_ops_register(&pseries_eeh_ops); +} diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index d928412cfb32..62b827626ca6 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -381,6 +381,7 @@ 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(); |