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/* * 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 JESD79-2F. * 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 0x100 #define OP_RUNNING_POLL 0x201 #define OP_RUNNING_INTERRUPT 0x202 #define OP_RUNNING_POLL_INTR 0x203 #define OP_OFFLINE 0x300 /** * 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]; } #endif /* _LINUX_EDAC_H_ */