/*
* Generic EDAC defs
*
* Author : Dave Jiang < djiang @ mvista . com >
*
* 2006 - 2008 ( c ) MontaVista Software , Inc . This file is licensed under
* the terms of the GNU General Public License version 2 . This program
* is licensed " as is " without any warranty of any kind , whether express
* or implied .
*
*/
#ifndef _LINUX_EDAC_H_
#define _LINUX_EDAC_H_
#include <linux/atomic.h>
#include <linux/device.h>
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/numa.h>
#define EDAC_DEVICE_NAME_LEN 31
struct device;
#define EDAC_OPSTATE_INVAL -1
#define EDAC_OPSTATE_POLL 0
#define EDAC_OPSTATE_NMI 1
#define EDAC_OPSTATE_INT 2
extern int edac_op_state;
const struct bus_type *edac_get_sysfs_subsys(void );
static inline void opstate_init(void )
{
switch (edac_op_state) {
case EDAC_OPSTATE_POLL:
case EDAC_OPSTATE_NMI:
break ;
default :
edac_op_state = EDAC_OPSTATE_POLL;
}
return ;
}
/* Max length of a DIMM label*/
#define EDAC_MC_LABEL_LEN 31
/* Maximum size of the location string */
#define LOCATION_SIZE 256
/* Defines the maximum number of labels that can be reported */
#define EDAC_MAX_LABELS 8
/* String used to join two or more labels */
#define OTHER_LABEL " or "
/**
* enum dev_type - describe the type of memory DRAM chips used at the stick
* @ DEV_UNKNOWN : Can ' t be determined , or MC doesn ' t support detect it
* @ DEV_X1 : 1 bit for data
* @ DEV_X2 : 2 bits for data
* @ DEV_X4 : 4 bits for data
* @ DEV_X8 : 8 bits for data
* @ DEV_X16 : 16 bits for data
* @ DEV_X32 : 32 bits for data
* @ DEV_X64 : 64 bits for data
*
* Typical values are x4 and x8 .
*/
enum dev_type {
DEV_UNKNOWN = 0 ,
DEV_X1,
DEV_X2,
DEV_X4,
DEV_X8,
DEV_X16,
DEV_X32, /* Do these parts exist? */
DEV_X64 /* Do these parts exist? */
};
#define DEV_FLAG_UNKNOWN BIT(DEV_UNKNOWN)
#define DEV_FLAG_X1 BIT(DEV_X1)
#define DEV_FLAG_X2 BIT(DEV_X2)
#define DEV_FLAG_X4 BIT(DEV_X4)
#define DEV_FLAG_X8 BIT(DEV_X8)
#define DEV_FLAG_X16 BIT(DEV_X16)
#define DEV_FLAG_X32 BIT(DEV_X32)
#define DEV_FLAG_X64 BIT(DEV_X64)
/**
* enum hw_event_mc_err_type - type of the detected error
*
* @ HW_EVENT_ERR_CORRECTED : Corrected Error - Indicates that an ECC
* corrected error was detected
* @ HW_EVENT_ERR_UNCORRECTED : Uncorrected Error - Indicates an error that
* can ' t be corrected by ECC , but it is not
* fatal ( maybe it is on an unused memory area ,
* or the memory controller could recover from
* it for example , by re - trying the operation ) .
* @ HW_EVENT_ERR_DEFERRED : Deferred Error - Indicates an uncorrectable
* error whose handling is not urgent . This could
* be due to hardware data poisoning where the
* system can continue operation until the poisoned
* data is consumed . Preemptive measures may also
* be taken , e . g . offlining pages , etc .
* @ HW_EVENT_ERR_FATAL : Fatal Error - Uncorrected error that could not
* be recovered .
* @ HW_EVENT_ERR_INFO : Informational - The CPER spec defines a forth
* type of error : informational logs .
*/
enum hw_event_mc_err_type {
HW_EVENT_ERR_CORRECTED,
HW_EVENT_ERR_UNCORRECTED,
HW_EVENT_ERR_DEFERRED,
HW_EVENT_ERR_FATAL,
HW_EVENT_ERR_INFO,
};
static inline char *mc_event_error_type(const unsigned int err_type)
{
switch (err_type) {
case HW_EVENT_ERR_CORRECTED:
return "Corrected" ;
case HW_EVENT_ERR_UNCORRECTED:
return "Uncorrected" ;
case HW_EVENT_ERR_DEFERRED:
return "Deferred" ;
case HW_EVENT_ERR_FATAL:
return "Fatal" ;
default :
case HW_EVENT_ERR_INFO:
return "Info" ;
}
}
/**
* enum mem_type - memory types . For a more detailed reference , please see
* http : //en.wikipedia.org/wiki/DRAM
*
* @ MEM_EMPTY : Empty csrow
* @ MEM_RESERVED : Reserved csrow type
* @ MEM_UNKNOWN : Unknown csrow type
* @ MEM_FPM : FPM - Fast Page Mode , used on systems up to 1995 .
* @ MEM_EDO : EDO - Extended data out , used on systems up to 1998 .
* @ MEM_BEDO : BEDO - Burst Extended data out , an EDO variant .
* @ MEM_SDR : SDR - Single data rate SDRAM
* http : //en.wikipedia.org/wiki/Synchronous_dynamic_random-access_memory
* They use 3 pins for chip select : Pins 0 and 2 are
* for rank 0 ; pins 1 and 3 are for rank 1 , if the memory
* is dual - rank .
* @ MEM_RDR : Registered SDR SDRAM
* @ MEM_DDR : Double data rate SDRAM
* http : //en.wikipedia.org/wiki/DDR_SDRAM
* @ MEM_RDDR : Registered Double data rate SDRAM
* This is a variant of the DDR memories .
* A registered memory has a buffer inside it , hiding
* part of the memory details to the memory controller .
* @ MEM_RMBS : Rambus DRAM , used on a few Pentium III / IV controllers .
* @ MEM_DDR2 : DDR2 RAM , as described at JEDEC JESD79 - 2 F .
* Those memories are labeled as " PC2 - " instead of " PC " to
* differentiate from DDR .
* @ MEM_FB_DDR2 : Fully - Buffered DDR2 , as described at JEDEC Std No . 205
* and JESD206 .
* Those memories are accessed per DIMM slot , and not by
* a chip select signal .
* @ MEM_RDDR2 : Registered DDR2 RAM
* This is a variant of the DDR2 memories .
* @ MEM_XDR : Rambus XDR
* It is an evolution of the original RAMBUS memories ,
* created to compete with DDR2 . Weren ' t used on any
* x86 arch , but cell_edac PPC memory controller uses it .
* @ MEM_DDR3 : DDR3 RAM
* @ MEM_RDDR3 : Registered DDR3 RAM
* This is a variant of the DDR3 memories .
* @ MEM_LRDDR3 : Load - Reduced DDR3 memory .
* @ MEM_LPDDR3 : Low - Power DDR3 memory .
* @ MEM_DDR4 : Unbuffered DDR4 RAM
* @ MEM_RDDR4 : Registered DDR4 RAM
* This is a variant of the DDR4 memories .
* @ MEM_LRDDR4 : Load - Reduced DDR4 memory .
* @ MEM_LPDDR4 : Low - Power DDR4 memory .
* @ MEM_DDR5 : Unbuffered DDR5 RAM
* @ MEM_RDDR5 : Registered DDR5 RAM
* @ MEM_LRDDR5 : Load - Reduced DDR5 memory .
* @ MEM_NVDIMM : Non - volatile RAM
* @ MEM_WIO2 : Wide I / O 2 .
* @ MEM_HBM2 : High bandwidth Memory Gen 2 .
* @ MEM_HBM3 : High bandwidth Memory Gen 3 .
*/
enum mem_type {
MEM_EMPTY = 0 ,
MEM_RESERVED,
MEM_UNKNOWN,
MEM_FPM,
MEM_EDO,
MEM_BEDO,
MEM_SDR,
MEM_RDR,
MEM_DDR,
MEM_RDDR,
MEM_RMBS,
MEM_DDR2,
MEM_FB_DDR2,
MEM_RDDR2,
MEM_XDR,
MEM_DDR3,
MEM_RDDR3,
MEM_LRDDR3,
MEM_LPDDR3,
MEM_DDR4,
MEM_RDDR4,
MEM_LRDDR4,
MEM_LPDDR4,
MEM_DDR5,
MEM_RDDR5,
MEM_LRDDR5,
MEM_NVDIMM,
MEM_WIO2,
MEM_HBM2,
MEM_HBM3,
};
#define MEM_FLAG_EMPTY BIT(MEM_EMPTY)
#define MEM_FLAG_RESERVED BIT(MEM_RESERVED)
#define MEM_FLAG_UNKNOWN BIT(MEM_UNKNOWN)
#define MEM_FLAG_FPM BIT(MEM_FPM)
#define MEM_FLAG_EDO BIT(MEM_EDO)
#define MEM_FLAG_BEDO BIT(MEM_BEDO)
#define MEM_FLAG_SDR BIT(MEM_SDR)
#define MEM_FLAG_RDR BIT(MEM_RDR)
#define MEM_FLAG_DDR BIT(MEM_DDR)
#define MEM_FLAG_RDDR BIT(MEM_RDDR)
#define MEM_FLAG_RMBS BIT(MEM_RMBS)
#define MEM_FLAG_DDR2 BIT(MEM_DDR2)
#define MEM_FLAG_FB_DDR2 BIT(MEM_FB_DDR2)
#define MEM_FLAG_RDDR2 BIT(MEM_RDDR2)
#define MEM_FLAG_XDR BIT(MEM_XDR)
#define MEM_FLAG_DDR3 BIT(MEM_DDR3)
#define MEM_FLAG_RDDR3 BIT(MEM_RDDR3)
#define MEM_FLAG_LPDDR3 BIT(MEM_LPDDR3)
#define MEM_FLAG_DDR4 BIT(MEM_DDR4)
#define MEM_FLAG_RDDR4 BIT(MEM_RDDR4)
#define MEM_FLAG_LRDDR4 BIT(MEM_LRDDR4)
#define MEM_FLAG_LPDDR4 BIT(MEM_LPDDR4)
#define MEM_FLAG_DDR5 BIT(MEM_DDR5)
#define MEM_FLAG_RDDR5 BIT(MEM_RDDR5)
#define MEM_FLAG_LRDDR5 BIT(MEM_LRDDR5)
#define MEM_FLAG_NVDIMM BIT(MEM_NVDIMM)
#define MEM_FLAG_WIO2 BIT(MEM_WIO2)
#define MEM_FLAG_HBM2 BIT(MEM_HBM2)
#define MEM_FLAG_HBM3 BIT(MEM_HBM3)
/**
* enum edac_type - Error Detection and Correction capabilities and mode
* @ EDAC_UNKNOWN : Unknown if ECC is available
* @ EDAC_NONE : Doesn ' t support ECC
* @ EDAC_RESERVED : Reserved ECC type
* @ EDAC_PARITY : Detects parity errors
* @ EDAC_EC : Error Checking - no correction
* @ EDAC_SECDED : Single bit error correction , Double detection
* @ EDAC_S2ECD2ED : Chipkill x2 devices - do these exist ?
* @ EDAC_S4ECD4ED : Chipkill x4 devices
* @ EDAC_S8ECD8ED : Chipkill x8 devices
* @ EDAC_S16ECD16ED : Chipkill x16 devices
*/
enum edac_type {
EDAC_UNKNOWN = 0 ,
EDAC_NONE,
EDAC_RESERVED,
EDAC_PARITY,
EDAC_EC,
EDAC_SECDED,
EDAC_S2ECD2ED,
EDAC_S4ECD4ED,
EDAC_S8ECD8ED,
EDAC_S16ECD16ED,
};
#define EDAC_FLAG_UNKNOWN BIT(EDAC_UNKNOWN)
#define EDAC_FLAG_NONE BIT(EDAC_NONE)
#define EDAC_FLAG_PARITY BIT(EDAC_PARITY)
#define EDAC_FLAG_EC BIT(EDAC_EC)
#define EDAC_FLAG_SECDED BIT(EDAC_SECDED)
#define EDAC_FLAG_S2ECD2ED BIT(EDAC_S2ECD2ED)
#define EDAC_FLAG_S4ECD4ED BIT(EDAC_S4ECD4ED)
#define EDAC_FLAG_S8ECD8ED BIT(EDAC_S8ECD8ED)
#define EDAC_FLAG_S16ECD16ED BIT(EDAC_S16ECD16ED)
/**
* enum scrub_type - scrubbing capabilities
* @ SCRUB_UNKNOWN : Unknown if scrubber is available
* @ SCRUB_NONE : No scrubber
* @ SCRUB_SW_PROG : SW progressive ( sequential ) scrubbing
* @ SCRUB_SW_SRC : Software scrub only errors
* @ SCRUB_SW_PROG_SRC : Progressive software scrub from an error
* @ SCRUB_SW_TUNABLE : Software scrub frequency is tunable
* @ SCRUB_HW_PROG : HW progressive ( sequential ) scrubbing
* @ SCRUB_HW_SRC : Hardware scrub only errors
* @ SCRUB_HW_PROG_SRC : Progressive hardware scrub from an error
* @ SCRUB_HW_TUNABLE : Hardware scrub frequency is tunable
*/
enum scrub_type {
SCRUB_UNKNOWN = 0 ,
SCRUB_NONE,
SCRUB_SW_PROG,
SCRUB_SW_SRC,
SCRUB_SW_PROG_SRC,
SCRUB_SW_TUNABLE,
SCRUB_HW_PROG,
SCRUB_HW_SRC,
SCRUB_HW_PROG_SRC,
SCRUB_HW_TUNABLE
};
#define SCRUB_FLAG_SW_PROG BIT(SCRUB_SW_PROG)
#define SCRUB_FLAG_SW_SRC BIT(SCRUB_SW_SRC)
#define SCRUB_FLAG_SW_PROG_SRC BIT(SCRUB_SW_PROG_SRC)
#define SCRUB_FLAG_SW_TUN BIT(SCRUB_SW_SCRUB_TUNABLE)
#define SCRUB_FLAG_HW_PROG BIT(SCRUB_HW_PROG)
#define SCRUB_FLAG_HW_SRC BIT(SCRUB_HW_SRC)
#define SCRUB_FLAG_HW_PROG_SRC BIT(SCRUB_HW_PROG_SRC)
#define SCRUB_FLAG_HW_TUN BIT(SCRUB_HW_TUNABLE)
/* FIXME - should have notify capabilities: NMI, LOG, PROC, etc */
/* EDAC internal operation states */
#define OP_ALLOC 0 x100
#define OP_RUNNING_POLL 0 x201
#define OP_RUNNING_INTERRUPT 0 x202
#define OP_RUNNING_POLL_INTR 0 x203
#define OP_OFFLINE 0 x300
/**
* enum edac_mc_layer_type - memory controller hierarchy layer
*
* @ EDAC_MC_LAYER_BRANCH : memory layer is named " branch "
* @ EDAC_MC_LAYER_CHANNEL : memory layer is named " channel "
* @ EDAC_MC_LAYER_SLOT : memory layer is named " slot "
* @ EDAC_MC_LAYER_CHIP_SELECT : memory layer is named " chip select "
* @ EDAC_MC_LAYER_ALL_MEM : memory layout is unknown . All memory is mapped
* as a single memory area . This is used when
* retrieving errors from a firmware driven driver .
*
* This enum is used by the drivers to tell edac_mc_sysfs what name should
* be used when describing a memory stick location .
*/
enum edac_mc_layer_type {
EDAC_MC_LAYER_BRANCH,
EDAC_MC_LAYER_CHANNEL,
EDAC_MC_LAYER_SLOT,
EDAC_MC_LAYER_CHIP_SELECT,
EDAC_MC_LAYER_ALL_MEM,
};
/**
* struct edac_mc_layer - describes the memory controller hierarchy
* @ type : layer type
* @ size : number of components per layer . For example ,
* if the channel layer has two channels , size = 2
* @ is_virt_csrow : This layer is part of the " csrow " when old API
* compatibility mode is enabled . Otherwise , it is
* a channel
*/
struct edac_mc_layer {
enum edac_mc_layer_type type;
unsigned size;
bool is_virt_csrow;
};
/*
* Maximum number of layers used by the memory controller to uniquely
* identify a single memory stick .
* NOTE : Changing this constant requires not only to change the constant
* below , but also to change the existing code at the core , as there are
* some code there that are optimized for 3 layers .
*/
#define EDAC_MAX_LAYERS 3
struct dimm_info {
struct device dev;
char label[EDAC_MC_LABEL_LEN + 1 ]; /* DIMM label on motherboard */
/* Memory location data */
unsigned int location[EDAC_MAX_LAYERS];
struct mem_ctl_info *mci; /* the parent */
unsigned int idx; /* index within the parent dimm array */
u32 grain; /* granularity of reported error in bytes */
enum dev_type dtype; /* memory device type */
enum mem_type mtype; /* memory dimm type */
enum edac_type edac_mode; /* EDAC mode for this dimm */
u32 nr_pages; /* number of pages on this dimm */
unsigned int csrow, cschannel; /* Points to the old API data */
u16 smbios_handle; /* Handle for SMBIOS type 17 */
u32 ce_count;
u32 ue_count;
};
/**
* struct rank_info - contains the information for one DIMM rank
*
* @ chan_idx : channel number where the rank is ( typically , 0 or 1 )
* @ ce_count : number of correctable errors for this rank
* @ csrow : A pointer to the chip select row structure ( the parent
* structure ) . The location of the rank is given by
* the ( csrow - > csrow_idx , chan_idx ) vector .
* @ dimm : A pointer to the DIMM structure , where the DIMM label
* information is stored .
*
* FIXME : Currently , the EDAC core model will assume one DIMM per rank .
* This is a bad assumption , but it makes this patch easier . Later
* patches in this series will fix this issue .
*/
struct rank_info {
int chan_idx;
struct csrow_info *csrow;
struct dimm_info *dimm;
u32 ce_count; /* Correctable Errors for this csrow */
};
struct csrow_info {
struct device dev;
/* Used only by edac_mc_find_csrow_by_page() */
unsigned long first_page; /* first page number in csrow */
unsigned long last_page; /* last page number in csrow */
unsigned long page_mask; /* used for interleaving -
* 0UL for non intlv */
int csrow_idx; /* the chip-select row */
u32 ue_count; /* Uncorrectable Errors for this csrow */
u32 ce_count; /* Correctable Errors for this csrow */
struct mem_ctl_info *mci; /* the parent */
/* channel information for this csrow */
u32 nr_channels;
struct rank_info **channels;
};
/*
* struct errcount_attribute - used to store the several error counts
*/
struct errcount_attribute_data {
int n_layers;
int pos[EDAC_MAX_LAYERS];
int layer0, layer1, layer2;
};
/**
* struct edac_raw_error_desc - Raw error report structure
* @ grain : minimum granularity for an error report , in bytes
* @ error_count : number of errors of the same type
* @ type : severity of the error ( CE / UE / Fatal )
* @ top_layer : top layer of the error ( layer [ 0 ] )
* @ mid_layer : middle layer of the error ( layer [ 1 ] )
* @ low_layer : low layer of the error ( layer [ 2 ] )
* @ page_frame_number : page where the error happened
* @ offset_in_page : page offset
* @ syndrome : syndrome of the error ( or 0 if unknown or if
* the syndrome is not applicable )
* @ msg : error message
* @ location : location of the error
* @ label : label of the affected DIMM ( s )
* @ other_detail : other driver - specific detail about the error
*/
struct edac_raw_error_desc {
char location[LOCATION_SIZE];
char label[(EDAC_MC_LABEL_LEN + 1 + sizeof (OTHER_LABEL)) * EDAC_MAX_LABELS];
long grain;
u16 error_count;
enum hw_event_mc_err_type type;
int top_layer;
int mid_layer;
int low_layer;
unsigned long page_frame_number;
unsigned long offset_in_page;
unsigned long syndrome;
const char *msg;
const char *other_detail;
};
/* MEMORY controller information structure
*/
struct mem_ctl_info {
struct device dev;
const struct bus_type *bus;
struct list_head link; /* for global list of mem_ctl_info structs */
struct module *owner; /* Module owner of this control struct */
unsigned long mtype_cap; /* memory types supported by mc */
unsigned long edac_ctl_cap; /* Mem controller EDAC capabilities */
unsigned long edac_cap; /* configuration capabilities - this is
* closely related to edac_ctl_cap . The
* difference is that the controller may be
* capable of s4ecd4ed which would be listed
* in edac_ctl_cap , but if channels aren ' t
* capable of s4ecd4ed then the edac_cap would
* not have that capability .
*/
unsigned long scrub_cap; /* chipset scrub capabilities */
enum scrub_type scrub_mode; /* current scrub mode */
/* Translates sdram memory scrub rate given in bytes/sec to the
internal representation and configures whatever else needs
to be configured .
*/
int (*set_sdram_scrub_rate) (struct mem_ctl_info * mci, u32 bw);
/* Get the current sdram memory scrub rate from the internal
representation and converts it to the closest matching
bandwidth in bytes / sec .
*/
int (*get_sdram_scrub_rate) (struct mem_ctl_info * mci);
/* pointer to edac checking routine */
void (*edac_check) (struct mem_ctl_info * mci);
/*
* Remaps memory pages : controller pages to physical pages .
* For most MC ' s , this will be NULL .
*/
/* FIXME - why not send the phys page to begin with? */
unsigned long (*ctl_page_to_phys) (struct mem_ctl_info * mci,
unsigned long page);
int mc_idx;
struct csrow_info **csrows;
unsigned int nr_csrows, num_cschannel;
/*
* Memory Controller hierarchy
*
* There are basically two types of memory controller : the ones that
* sees memory sticks ( " dimms " ) , and the ones that sees memory ranks .
* All old memory controllers enumerate memories per rank , but most
* of the recent drivers enumerate memories per DIMM , instead .
* When the memory controller is per rank , csbased is true .
*/
unsigned int n_layers;
struct edac_mc_layer *layers;
bool csbased;
/*
* DIMM info . Will eventually remove the entire csrows_info some day
*/
unsigned int tot_dimms;
struct dimm_info **dimms;
/*
* FIXME - what about controllers on other busses ? - IDs must be
* unique . dev pointer should be sufficiently unique , but
* BUS : SLOT . FUNC numbers may not be unique .
*/
struct device *pdev;
const char *mod_name;
const char *ctl_name;
const char *dev_name;
void *pvt_info;
unsigned long start_time; /* mci load start time (in jiffies) */
/*
* drivers shouldn ' t access those fields directly , as the core
* already handles that .
*/
u32 ce_noinfo_count, ue_noinfo_count;
u32 ue_mc, ce_mc;
struct completion complete;
/* Additional top controller level attributes, but specified
* by the low level driver .
*
* Set by the low level driver to provide attributes at the
* controller level .
* An array of structures , NULL terminated
*
* If attributes are desired , then set to array of attributes
* If no attributes are desired , leave NULL
*/
const struct mcidev_sysfs_attribute *mc_driver_sysfs_attributes;
/* work struct for this MC */
struct delayed_work work;
/*
* Used to report an error - by being at the global struct
* makes the memory allocated by the EDAC core
*/
struct edac_raw_error_desc error_desc;
/* the internal state of this controller instance */
int op_state;
struct dentry *debugfs;
u8 fake_inject_layer[EDAC_MAX_LAYERS];
bool fake_inject_ue;
u16 fake_inject_count;
};
#define mci_for_each_dimm(mci, dimm) \
for ((dimm) = (mci)->dimms[0 ]; \
(dimm); \
(dimm) = (dimm)->idx + 1 < (mci)->tot_dimms \
? (mci)->dimms[(dimm)->idx + 1 ] \
: NULL)
/**
* edac_get_dimm - Get DIMM info from a memory controller given by
* [ layer0 , layer1 , layer2 ] position
*
* @ mci : MC descriptor struct mem_ctl_info
* @ layer0 : layer0 position
* @ layer1 : layer1 position . Unused if n_layers < 2
* @ layer2 : layer2 position . Unused if n_layers < 3
*
* For 1 layer , this function returns " dimms [ layer0 ] " ;
*
* For 2 layers , this function is similar to allocating a two - dimensional
* array and returning " dimms [ layer0 ] [ layer1 ] " ;
*
* For 3 layers , this function is similar to allocating a tri - dimensional
* array and returning " dimms [ layer0 ] [ layer1 ] [ layer2 ] " ;
*/
static inline struct dimm_info *edac_get_dimm(struct mem_ctl_info *mci,
int layer0, int layer1, int layer2)
{
int index;
if (layer0 < 0
|| (mci->n_layers > 1 && layer1 < 0 )
|| (mci->n_layers > 2 && layer2 < 0 ))
return NULL;
index = layer0;
if (mci->n_layers > 1 )
index = index * mci->layers[1 ].size + layer1;
if (mci->n_layers > 2 )
index = index * mci->layers[2 ].size + layer2;
if (index < 0 || index >= mci->tot_dimms)
return NULL;
if (WARN_ON_ONCE(mci->dimms[index]->idx != index))
return NULL;
return mci->dimms[index];
}
#define EDAC_FEAT_NAME_LEN 128
/* RAS feature type */
enum edac_dev_feat {
RAS_FEAT_SCRUB,
RAS_FEAT_ECS,
RAS_FEAT_MEM_REPAIR,
RAS_FEAT_MAX
};
/**
* struct edac_scrub_ops - scrub device operations ( all elements optional )
* @ read_addr : read base address of scrubbing range .
* @ read_size : read offset of scrubbing range .
* @ write_addr : set base address of the scrubbing range .
* @ write_size : set offset of the scrubbing range .
* @ get_enabled_bg : check if currently performing background scrub .
* @ set_enabled_bg : start or stop a bg - scrub .
* @ get_min_cycle : get minimum supported scrub cycle duration in seconds .
* @ get_max_cycle : get maximum supported scrub cycle duration in seconds .
* @ get_cycle_duration : get current scrub cycle duration in seconds .
* @ set_cycle_duration : set current scrub cycle duration in seconds .
*/
struct edac_scrub_ops {
int (*read_addr)(struct device *dev, void *drv_data, u64 *base);
int (*read_size)(struct device *dev, void *drv_data, u64 *size);
int (*write_addr)(struct device *dev, void *drv_data, u64 base);
int (*write_size)(struct device *dev, void *drv_data, u64 size);
int (*get_enabled_bg)(struct device *dev, void *drv_data, bool *enable);
int (*set_enabled_bg)(struct device *dev, void *drv_data, bool enable);
int (*get_min_cycle)(struct device *dev, void *drv_data, u32 *min);
int (*get_max_cycle)(struct device *dev, void *drv_data, u32 *max);
int (*get_cycle_duration)(struct device *dev, void *drv_data, u32 *cycle);
int (*set_cycle_duration)(struct device *dev, void *drv_data, u32 cycle);
};
#if IS_ENABLED(CONFIG_EDAC_SCRUB)
int edac_scrub_get_desc(struct device *scrub_dev,
const struct attribute_group **attr_groups,
u8 instance);
#else
static inline int edac_scrub_get_desc(struct device *scrub_dev,
const struct attribute_group **attr_groups,
u8 instance)
{ return -EOPNOTSUPP; }
#endif /* CONFIG_EDAC_SCRUB */
/**
* struct edac_ecs_ops - ECS device operations ( all elements optional )
* @ get_log_entry_type : read the log entry type value .
* @ set_log_entry_type : set the log entry type value .
* @ get_mode : read the mode value .
* @ set_mode : set the mode value .
* @ reset : reset the ECS counter .
* @ get_threshold : read the threshold count per gigabits of memory cells .
* @ set_threshold : set the threshold count per gigabits of memory cells .
*/
struct edac_ecs_ops {
int (*get_log_entry_type)(struct device *dev, void *drv_data, int fru_id, u32 *val);
int (*set_log_entry_type)(struct device *dev, void *drv_data, int fru_id, u32 val);
int (*get_mode)(struct device *dev, void *drv_data, int fru_id, u32 *val);
int (*set_mode)(struct device *dev, void *drv_data, int fru_id, u32 val);
int (*reset)(struct device *dev, void *drv_data, int fru_id, u32 val);
int (*get_threshold)(struct device *dev, void *drv_data, int fru_id, u32 *threshold);
int (*set_threshold)(struct device *dev, void *drv_data, int fru_id, u32 threshold);
};
struct edac_ecs_ex_info {
u16 num_media_frus;
};
#if IS_ENABLED(CONFIG_EDAC_ECS)
int edac_ecs_get_desc(struct device *ecs_dev,
const struct attribute_group **attr_groups,
u16 num_media_frus);
#else
static inline int edac_ecs_get_desc(struct device *ecs_dev,
const struct attribute_group **attr_groups,
u16 num_media_frus)
{ return -EOPNOTSUPP; }
#endif /* CONFIG_EDAC_ECS */
enum edac_mem_repair_type {
EDAC_REPAIR_PPR,
EDAC_REPAIR_CACHELINE_SPARING,
EDAC_REPAIR_ROW_SPARING,
EDAC_REPAIR_BANK_SPARING,
EDAC_REPAIR_RANK_SPARING,
EDAC_REPAIR_MAX
};
extern const char * const edac_repair_type[];
enum edac_mem_repair_cmd {
EDAC_DO_MEM_REPAIR = 1 ,
};
/**
* struct edac_mem_repair_ops - memory repair operations
* ( all elements are optional except do_repair , set_hpa / set_dpa )
* @ get_repair_type : get the memory repair type , listed in
* enum edac_mem_repair_function .
* @ get_persist_mode : get the current persist mode .
* false - Soft repair type ( temporary repair ) .
* true - Hard memory repair type ( permanent repair ) .
* @ set_persist_mode : set the persist mode of the memory repair instance .
* @ get_repair_safe_when_in_use : get whether memory media is accessible and
* data is retained during repair operation .
* @ get_hpa : get current host physical address ( HPA ) of memory to repair .
* @ set_hpa : set host physical address ( HPA ) of memory to repair .
* @ get_min_hpa : get the minimum supported host physical address ( HPA ) .
* @ get_max_hpa : get the maximum supported host physical address ( HPA ) .
* @ get_dpa : get current device physical address ( DPA ) of memory to repair .
* @ set_dpa : set device physical address ( DPA ) of memory to repair .
* In some states of system configuration ( e . g . before address decoders
* have been configured ) , memory devices ( e . g . CXL ) may not have an active
* mapping in the host physical address map . As such , the memory
* to repair must be identified by a device specific physical addressing
* scheme using a device physical address ( DPA ) . The DPA and other control
* attributes to use for the repair operations will be presented in related
* error records .
* @ get_min_dpa : get the minimum supported device physical address ( DPA ) .
* @ get_max_dpa : get the maximum supported device physical address ( DPA ) .
* @ get_nibble_mask : get current nibble mask of memory to repair .
* @ set_nibble_mask : set nibble mask of memory to repair .
* @ get_bank_group : get current bank group of memory to repair .
* @ set_bank_group : set bank group of memory to repair .
* @ get_bank : get current bank of memory to repair .
* @ set_bank : set bank of memory to repair .
* @ get_rank : get current rank of memory to repair .
* @ set_rank : set rank of memory to repair .
* @ get_row : get current row of memory to repair .
* @ set_row : set row of memory to repair .
* @ get_column : get current column of memory to repair .
* @ set_column : set column of memory to repair .
* @ get_channel : get current channel of memory to repair .
* @ set_channel : set channel of memory to repair .
* @ get_sub_channel : get current subchannel of memory to repair .
* @ set_sub_channel : set subchannel of memory to repair .
* @ do_repair : Issue memory repair operation for the HPA / DPA and
* other control attributes set for the memory to repair .
*
* All elements are optional except do_repair and at least one of set_hpa / set_dpa .
*/
struct edac_mem_repair_ops {
int (*get_repair_type)(struct device *dev, void *drv_data, const char **type);
int (*get_persist_mode)(struct device *dev, void *drv_data, bool *persist);
int (*set_persist_mode)(struct device *dev, void *drv_data, bool persist);
int (*get_repair_safe_when_in_use)(struct device *dev, void *drv_data, bool *safe);
int (*get_hpa)(struct device *dev, void *drv_data, u64 *hpa);
int (*set_hpa)(struct device *dev, void *drv_data, u64 hpa);
int (*get_min_hpa)(struct device *dev, void *drv_data, u64 *hpa);
int (*get_max_hpa)(struct device *dev, void *drv_data, u64 *hpa);
int (*get_dpa)(struct device *dev, void *drv_data, u64 *dpa);
int (*set_dpa)(struct device *dev, void *drv_data, u64 dpa);
int (*get_min_dpa)(struct device *dev, void *drv_data, u64 *dpa);
int (*get_max_dpa)(struct device *dev, void *drv_data, u64 *dpa);
int (*get_nibble_mask)(struct device *dev, void *drv_data, u32 *val);
int (*set_nibble_mask)(struct device *dev, void *drv_data, u32 val);
int (*get_bank_group)(struct device *dev, void *drv_data, u32 *val);
int (*set_bank_group)(struct device *dev, void *drv_data, u32 val);
int (*get_bank)(struct device *dev, void *drv_data, u32 *val);
int (*set_bank)(struct device *dev, void *drv_data, u32 val);
int (*get_rank)(struct device *dev, void *drv_data, u32 *val);
int (*set_rank)(struct device *dev, void *drv_data, u32 val);
int (*get_row)(struct device *dev, void *drv_data, u32 *val);
int (*set_row)(struct device *dev, void *drv_data, u32 val);
int (*get_column)(struct device *dev, void *drv_data, u32 *val);
int (*set_column)(struct device *dev, void *drv_data, u32 val);
int (*get_channel)(struct device *dev, void *drv_data, u32 *val);
int (*set_channel)(struct device *dev, void *drv_data, u32 val);
int (*get_sub_channel)(struct device *dev, void *drv_data, u32 *val);
int (*set_sub_channel)(struct device *dev, void *drv_data, u32 val);
int (*do_repair)(struct device *dev, void *drv_data, u32 val);
};
#if IS_ENABLED(CONFIG_EDAC_MEM_REPAIR)
int edac_mem_repair_get_desc(struct device *dev,
const struct attribute_group **attr_groups,
u8 instance);
#else
static inline int edac_mem_repair_get_desc(struct device *dev,
const struct attribute_group **attr_groups,
u8 instance)
{ return -EOPNOTSUPP; }
#endif /* CONFIG_EDAC_MEM_REPAIR */
/* EDAC device feature information structure */
struct edac_dev_data {
union {
const struct edac_scrub_ops *scrub_ops;
const struct edac_ecs_ops *ecs_ops;
const struct edac_mem_repair_ops *mem_repair_ops;
};
u8 instance;
void *private ;
};
struct edac_dev_feat_ctx {
struct device dev;
void *private ;
struct edac_dev_data *scrub;
struct edac_dev_data ecs;
struct edac_dev_data *mem_repair;
};
struct edac_dev_feature {
enum edac_dev_feat ft_type;
u8 instance;
union {
const struct edac_scrub_ops *scrub_ops;
const struct edac_ecs_ops *ecs_ops;
const struct edac_mem_repair_ops *mem_repair_ops;
};
void *ctx;
struct edac_ecs_ex_info ecs_info;
};
int edac_dev_register(struct device *parent, char *dev_name,
void *parent_pvt_data, int num_features,
const struct edac_dev_feature *ras_features);
#endif /* _LINUX_EDAC_H_ */
Messung V0.5 in Prozent C=95 H=93 G=93
¤ Dauer der Verarbeitung: 0.23 Sekunden
(vorverarbeitet am 2026-09-28)
¤
*© Formatika GbR, Deutschland