1 files changed, 350 insertions, 0 deletions

diff --git a/include/linux/edac.h b/include/linux/edac.h
index 4a73257b47d0..055b248bdd53 100644
--- a/include/linux/edac.h
+++ b/include/linux/edac.h
@@ -42,4 +42,354 @@ static inline void opstate_init(void)
         return;
 }
 
+#define EDAC_MC_LABEL_LEN       31
+#define MC_PROC_NAME_MAX_LEN    7
+
+/* memory devices */
+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)
+
+/* memory types */
+enum mem_type {
+        MEM_EMPTY = 0,          /* Empty csrow */
+        MEM_RESERVED,           /* Reserved csrow type */
+        MEM_UNKNOWN,            /* Unknown csrow type */
+        MEM_FPM,                /* Fast page mode */
+        MEM_EDO,                /* Extended data out */
+        MEM_BEDO,               /* Burst Extended data out */
+        MEM_SDR,                /* Single data rate SDRAM */
+        MEM_RDR,                /* Registered single data rate SDRAM */
+        MEM_DDR,                /* Double data rate SDRAM */
+        MEM_RDDR,               /* Registered Double data rate SDRAM */
+        MEM_RMBS,               /* Rambus DRAM */
+        MEM_DDR2,               /* DDR2 RAM */
+        MEM_FB_DDR2,            /* fully buffered DDR2 */
+        MEM_RDDR2,              /* Registered DDR2 RAM */
+        MEM_XDR,                /* Rambus XDR */
+        MEM_DDR3,               /* DDR3 RAM */
+        MEM_RDDR3,              /* Registered DDR3 RAM */
+};
+
+#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)
+
+/* chipset Error Detection and Correction capabilities and mode */
+enum edac_type {
+        EDAC_UNKNOWN = 0,       /* 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 */
+};
+
+#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)
+
+/* scrubbing capabilities */
+enum scrub_type {
+        SCRUB_UNKNOWN = 0,      /* 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 */
+};
+
+#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
+
+/*
+ * There are several things to be aware of that aren't at all obvious:
+ *
+ *
+ * SOCKETS, SOCKET SETS, BANKS, ROWS, CHIP-SELECT ROWS, CHANNELS, etc..
+ *
+ * These are some of the many terms that are thrown about that don't always
+ * mean what people think they mean (Inconceivable!).  In the interest of
+ * creating a common ground for discussion, terms and their definitions
+ * will be established.
+ *
+ * Memory devices:      The individual chip on a memory stick.  These devices
+ *                      commonly output 4 and 8 bits each.  Grouping several
+ *                      of these in parallel provides 64 bits which is common
+ *                      for a memory stick.
+ *
+ * Memory Stick:        A printed circuit board that aggregates multiple
+ *                      memory devices in parallel.  This is the atomic
+ *                      memory component that is purchaseable by Joe consumer
+ *                      and loaded into a memory socket.
+ *
+ * Socket:              A physical connector on the motherboard that accepts
+ *                      a single memory stick.
+ *
+ * Channel:             Set of memory devices on a memory stick that must be
+ *                      grouped in parallel with one or more additional
+ *                      channels from other memory sticks.  This parallel
+ *                      grouping of the output from multiple channels are
+ *                      necessary for the smallest granularity of memory access.
+ *                      Some memory controllers are capable of single channel -
+ *                      which means that memory sticks can be loaded
+ *                      individually.  Other memory controllers are only
+ *                      capable of dual channel - which means that memory
+ *                      sticks must be loaded as pairs (see "socket set").
+ *
+ * Chip-select row:     All of the memory devices that are selected together.
+ *                      for a single, minimum grain of memory access.
+ *                      This selects all of the parallel memory devices across
+ *                      all of the parallel channels.  Common chip-select rows
+ *                      for single channel are 64 bits, for dual channel 128
+ *                      bits.
+ *
+ * Single-Ranked stick: A Single-ranked stick has 1 chip-select row of memory.
+ *                      Motherboards commonly drive two chip-select pins to
+ *                      a memory stick. A single-ranked stick, will occupy
+ *                      only one of those rows. The other will be unused.
+ *
+ * Double-Ranked stick: A double-ranked stick has two chip-select rows which
+ *                      access different sets of memory devices.  The two
+ *                      rows cannot be accessed concurrently.
+ *
+ * Double-sided stick:  DEPRECATED TERM, see Double-Ranked stick.
+ *                      A double-sided stick has two chip-select rows which
+ *                      access different sets of memory devices.  The two
+ *                      rows cannot be accessed concurrently.  "Double-sided"
+ *                      is irrespective of the memory devices being mounted
+ *                      on both sides of the memory stick.
+ *
+ * Socket set:          All of the memory sticks that are required for
+ *                      a single memory access or all of the memory sticks
+ *                      spanned by a chip-select row.  A single socket set
+ *                      has two chip-select rows and if double-sided sticks
+ *                      are used these will occupy those chip-select rows.
+ *
+ * Bank:                This term is avoided because it is unclear when
+ *                      needing to distinguish between chip-select rows and
+ *                      socket sets.
+ *
+ * Controller pages:
+ *
+ * Physical pages:
+ *
+ * Virtual pages:
+ *
+ *
+ * STRUCTURE ORGANIZATION AND CHOICES
+ *
+ *
+ *
+ * PS - I enjoyed writing all that about as much as you enjoyed reading it.
+ */
+
+struct channel_info {
+        int chan_idx;           /* channel index */
+        u32 ce_count;           /* Correctable Errors for this CHANNEL */
+        char label[EDAC_MC_LABEL_LEN + 1];      /* DIMM label on motherboard */
+        struct csrow_info *csrow;       /* the parent */
+};
+
+struct csrow_info {
+        unsigned long first_page;       /* first page number in dimm */
+        unsigned long last_page;        /* last page number in dimm */
+        unsigned long page_mask;        /* used for interleaving -
+                                         * 0UL for non intlv
+                                         */
+        u32 nr_pages;           /* number of pages in csrow */
+        u32 grain;              /* granularity of reported error in bytes */
+        int csrow_idx;          /* the chip-select row */
+        enum dev_type dtype;    /* memory device type */
+        u32 ue_count;           /* Uncorrectable Errors for this csrow */
+        u32 ce_count;           /* Correctable Errors for this csrow */
+        enum mem_type mtype;    /* memory csrow type */
+        enum edac_type edac_mode;       /* EDAC mode for this csrow */
+        struct mem_ctl_info *mci;       /* the parent */
+
+        struct kobject kobj;    /* sysfs kobject for this csrow */
+
+        /* channel information for this csrow */
+        u32 nr_channels;
+        struct channel_info *channels;
+};
+
+struct mcidev_sysfs_group {
+        const char *name;                               /* group name */
+        const struct mcidev_sysfs_attribute *mcidev_attr; /* group attributes */
+};
+
+struct mcidev_sysfs_group_kobj {
+        struct list_head list;          /* list for all instances within a mc */
+
+        struct kobject kobj;            /* kobj for the group */
+
+        const struct mcidev_sysfs_group *grp;   /* group description table */
+        struct mem_ctl_info *mci;       /* the parent */
+};
+
+/* mcidev_sysfs_attribute structure
+ *      used for driver sysfs attributes and in mem_ctl_info
+ *      sysfs top level entries
+ */
+struct mcidev_sysfs_attribute {
+        /* It should use either attr or grp */
+        struct attribute attr;
+        const struct mcidev_sysfs_group *grp;   /* Points to a group of attributes */
+
+        /* Ops for show/store values at the attribute - not used on group */
+        ssize_t (*show)(struct mem_ctl_info *,char *);
+        ssize_t (*store)(struct mem_ctl_info *, const char *,size_t);
+};
+
+/* MEMORY controller information structure
+ */
+struct mem_ctl_info {
+        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;
+        int nr_csrows;
+        struct csrow_info *csrows;
+        /*
+         * 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 *dev;
+        const char *mod_name;
+        const char *mod_ver;
+        const char *ctl_name;
+        const char *dev_name;
+        char proc_name[MC_PROC_NAME_MAX_LEN + 1];
+        void *pvt_info;
+        u32 ue_noinfo_count;    /* Uncorrectable Errors w/o info */
+        u32 ce_noinfo_count;    /* Correctable Errors w/o info */
+        u32 ue_count;           /* Total Uncorrectable Errors for this MC */
+        u32 ce_count;           /* Total Correctable Errors for this MC */
+        unsigned long start_time;       /* mci load start time (in jiffies) */
+
+        struct completion complete;
+
+        /* edac sysfs device control */
+        struct kobject edac_mci_kobj;
+
+        /* list for all grp instances within a mc */
+        struct list_head grp_kobj_list;
+
+        /* 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, same level as 'ue_count' and 'ce_count' above.
+         * 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;
+
+        /* the internal state of this controller instance */
+        int op_state;
+};
+
 #endif