diff options
Diffstat (limited to 'drivers/edac/edac_core.h')
| -rw-r--r-- | drivers/edac/edac_core.h | 252 |
1 files changed, 246 insertions, 6 deletions
diff --git a/drivers/edac/edac_core.h b/drivers/edac/edac_core.h index 397f144791e..a3e4b97fe4f 100644 --- a/drivers/edac/edac_core.h +++ b/drivers/edac/edac_core.h @@ -32,9 +32,14 @@ #include <linux/completion.h> #include <linux/kobject.h> #include <linux/platform_device.h> +#include <linux/sysdev.h> +#include <linux/workqueue.h> +#include <linux/version.h> #define EDAC_MC_LABEL_LEN 31 -#define MC_PROC_NAME_MAX_LEN 7 +#define EDAC_DEVICE_NAME_LEN 31 +#define EDAC_ATTRIB_VALUE_LEN 15 +#define MC_PROC_NAME_MAX_LEN 7 #if PAGE_SHIFT < 20 #define PAGES_TO_MiB( pages ) ( ( pages ) >> ( 20 - PAGE_SHIFT ) ) @@ -51,6 +56,10 @@ #define edac_mc_chipset_printk(mci, level, prefix, fmt, arg...) \ printk(level "EDAC " prefix " MC%d: " fmt, mci->mc_idx, ##arg) +/* edac_device printk */ +#define edac_device_printk(ctl, level, fmt, arg...) \ + printk(level "EDAC DEVICE%d: " fmt, ctl->dev_idx, ##arg) + /* prefixes for edac_printk() and edac_mc_printk() */ #define EDAC_MC "MC" #define EDAC_PCI "PCI" @@ -62,7 +71,7 @@ extern int edac_debug_level; #define edac_debug_printk(level, fmt, arg...) \ do { \ if (level <= edac_debug_level) \ - edac_printk(KERN_DEBUG, EDAC_DEBUG, fmt, ##arg); \ + edac_printk(KERN_EMERG, EDAC_DEBUG, fmt, ##arg); \ } while(0) #define debugf0( ... ) edac_debug_printk(0, __VA_ARGS__ ) @@ -195,6 +204,8 @@ enum scrub_type { /* FIXME - should have notify capabilities: NMI, LOG, PROC, etc */ +extern char * edac_align_ptr(void *ptr, unsigned size); + /* * There are several things to be aware of that aren't at all obvious: * @@ -376,6 +387,231 @@ struct mem_ctl_info { struct completion kobj_complete; }; +/* + * The following are the structures to provide for a generice + * or abstract 'edac_device'. This set of structures and the + * code that implements the APIs for the same, provide for + * registering EDAC type devices which are NOT standard memory. + * + * CPU caches (L1 and L2) + * DMA engines + * Core CPU swithces + * Fabric switch units + * PCIe interface controllers + * other EDAC/ECC type devices that can be monitored for + * errors, etc. + * + * It allows for a 2 level set of hiearchry. For example: + * + * cache could be composed of L1, L2 and L3 levels of cache. + * Each CPU core would have its own L1 cache, while sharing + * L2 and maybe L3 caches. + * + * View them arranged, via the sysfs presentation: + * /sys/devices/system/edac/.. + * + * mc/ <existing memory device directory> + * cpu/cpu0/.. <L1 and L2 block directory> + * /L1-cache/ce_count + * /ue_count + * /L2-cache/ce_count + * /ue_count + * cpu/cpu1/.. <L1 and L2 block directory> + * /L1-cache/ce_count + * /ue_count + * /L2-cache/ce_count + * /ue_count + * ... + * + * the L1 and L2 directories would be "edac_device_block's" + */ + +struct edac_device_counter { + u32 ue_count; + u32 ce_count; +}; + +#define INC_COUNTER(cnt) (cnt++) + +/* + * An array of these is passed to the alloc() function + * to specify attributes of the edac_block + */ +struct edac_attrib_spec { + char name[EDAC_DEVICE_NAME_LEN + 1]; + + int type; +#define EDAC_ATTR_INT 0x01 +#define EDAC_ATTR_CHAR 0x02 +}; + + +/* Attribute control structure + * In this structure is a pointer to the driver's edac_attrib_spec + * The life of this pointer is inclusive in the life of the driver's + * life cycle. + */ +struct edac_attrib { + struct edac_device_block *block; /* Up Pointer */ + + struct edac_attrib_spec *spec; /* ptr to module spec entry */ + + union { /* actual value */ + int edac_attrib_int_value; + char edac_attrib_char_value[EDAC_ATTRIB_VALUE_LEN + 1]; + } edac_attrib_value; +}; + +/* device block control structure */ +struct edac_device_block { + struct edac_device_instance *instance; /* Up Pointer */ + char name[EDAC_DEVICE_NAME_LEN + 1]; + + struct edac_device_counter counters; /* basic UE and CE counters */ + + int nr_attribs; /* how many attributes */ + struct edac_attrib *attribs; /* this block's attributes */ + + /* edac sysfs device control */ + struct kobject kobj; + struct completion kobj_complete; +}; + +/* device instance control structure */ +struct edac_device_instance { + struct edac_device_ctl_info *ctl; /* Up pointer */ + char name[EDAC_DEVICE_NAME_LEN + 4]; + + struct edac_device_counter counters; /* instance counters */ + + u32 nr_blocks; /* how many blocks */ + struct edac_device_block *blocks; /* block array */ + + /* edac sysfs device control */ + struct kobject kobj; + struct completion kobj_complete; +}; + + +/* + * Abstract edac_device control info structure + * + */ +struct edac_device_ctl_info { + /* for global list of edac_device_ctl_info structs */ + struct list_head link; + + int dev_idx; + + /* Per instance controls for this edac_device */ + int log_ue; /* boolean for logging UEs */ + int log_ce; /* boolean for logging CEs */ + int panic_on_ue; /* boolean for panic'ing on an UE */ + unsigned poll_msec; /* number of milliseconds to poll interval */ + unsigned long delay; /* number of jiffies for poll_msec */ + + struct sysdev_class *edac_class; /* pointer to class */ + + /* the internal state of this controller instance */ + int op_state; +#define OP_ALLOC 0x100 +#define OP_RUNNING_POLL 0x201 +#define OP_RUNNING_INTERRUPT 0x202 +#define OP_RUNNING_POLL_INTR 0x203 +#define OP_OFFLINE 0x300 + + /* work struct for this instance */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)) + struct delayed_work work; +#else + struct work_struct work; +#endif + + /* pointer to edac polling checking routine: + * If NOT NULL: points to polling check routine + * If NULL: Then assumes INTERRUPT operation, where + * MC driver will receive events + */ + void (*edac_check) (struct edac_device_ctl_info * edac_dev); + + struct device *dev; /* pointer to device structure */ + + const char *mod_name; /* module name */ + const char *ctl_name; /* edac controller name */ + + void *pvt_info; /* pointer to 'private driver' info */ + + unsigned long start_time;/* edac_device load start time (jiffies)*/ + + /* these are for safe removal of mc devices from global list while + * NMI handlers may be traversing list + */ + struct rcu_head rcu; + struct completion complete; + + /* sysfs top name under 'edac' directory + * and instance name: + * cpu/cpu0/... + * cpu/cpu1/... + * cpu/cpu2/... + * ... + */ + char name[EDAC_DEVICE_NAME_LEN + 1]; + + /* Number of instances supported on this control structure + * and the array of those instances + */ + u32 nr_instances; + struct edac_device_instance *instances; + + /* Event counters for the this whole EDAC Device */ + struct edac_device_counter counters; + + /* edac sysfs device control for the 'name' + * device this structure controls + */ + struct kobject kobj; + struct completion kobj_complete; +}; + +/* To get from the instance's wq to the beginning of the ctl structure */ +#define to_edac_device_ctl_work(w) \ + container_of(w,struct edac_device_ctl_info,work) + +/* Function to calc the number of delay jiffies from poll_msec */ +static inline void edac_device_calc_delay( + struct edac_device_ctl_info *edac_dev) +{ + /* convert from msec to jiffies */ + edac_dev->delay = edac_dev->poll_msec * HZ / 1000; +} + +/* + * The alloc() and free() functions for the 'edac_device' control info + * structure. A MC driver will allocate one of these for each edac_device + * it is going to control/register with the EDAC CORE. + */ +extern struct edac_device_ctl_info *edac_device_alloc_ctl_info( + unsigned sizeof_private, + char *edac_device_name, + unsigned nr_instances, + char *edac_block_name, + unsigned nr_blocks, + unsigned offset_value, + struct edac_attrib_spec *attrib_spec, + unsigned nr_attribs +); + +/* The offset value can be: + * -1 indicating no offset value + * 0 for zero-based block numbers + * 1 for 1-based block number + * other for other-based block number + */ +#define BLOCK_OFFSET_VALUE_OFF ((unsigned) -1) + +extern void edac_device_free_ctl_info( struct edac_device_ctl_info *ctl_info); + #ifdef CONFIG_PCI /* write all or some bits in a byte-register*/ @@ -466,13 +702,17 @@ extern void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci, char *msg); /* - * This kmalloc's and initializes all the structures. - * Can't be used if all structures don't have the same lifetime. + * edac_device APIs */ extern struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, unsigned nr_chans); - -/* Free an mc previously allocated by edac_mc_alloc() */ extern void edac_mc_free(struct mem_ctl_info *mci); +extern int edac_device_add_device(struct edac_device_ctl_info *edac_dev, int edac_idx); +extern struct edac_device_ctl_info * edac_device_del_device(struct device *dev); +extern void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev, + int inst_nr, int block_nr, const char *msg); +extern void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev, + int inst_nr, int block_nr, const char *msg); + #endif /* _EDAC_CORE_H_ */ |