diff options
Diffstat (limited to 'kernel/drivers/edac/sb_edac.c')
| -rw-r--r-- | kernel/drivers/edac/sb_edac.c | 2592 |
1 files changed, 2592 insertions, 0 deletions
diff --git a/kernel/drivers/edac/sb_edac.c b/kernel/drivers/edac/sb_edac.c new file mode 100644 index 000000000..1acf57ba4 --- /dev/null +++ b/kernel/drivers/edac/sb_edac.c @@ -0,0 +1,2592 @@ +/* Intel Sandy Bridge -EN/-EP/-EX Memory Controller kernel module + * + * This driver supports the memory controllers found on the Intel + * processor family Sandy Bridge. + * + * This file may be distributed under the terms of the + * GNU General Public License version 2 only. + * + * Copyright (c) 2011 by: + * Mauro Carvalho Chehab + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/pci_ids.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/edac.h> +#include <linux/mmzone.h> +#include <linux/smp.h> +#include <linux/bitmap.h> +#include <linux/math64.h> +#include <asm/processor.h> +#include <asm/mce.h> + +#include "edac_core.h" + +/* Static vars */ +static LIST_HEAD(sbridge_edac_list); +static DEFINE_MUTEX(sbridge_edac_lock); +static int probed; + +/* + * Alter this version for the module when modifications are made + */ +#define SBRIDGE_REVISION " Ver: 1.1.0 " +#define EDAC_MOD_STR "sbridge_edac" + +/* + * Debug macros + */ +#define sbridge_printk(level, fmt, arg...) \ + edac_printk(level, "sbridge", fmt, ##arg) + +#define sbridge_mc_printk(mci, level, fmt, arg...) \ + edac_mc_chipset_printk(mci, level, "sbridge", fmt, ##arg) + +/* + * Get a bit field at register value <v>, from bit <lo> to bit <hi> + */ +#define GET_BITFIELD(v, lo, hi) \ + (((v) & GENMASK_ULL(hi, lo)) >> (lo)) + +/* Devices 12 Function 6, Offsets 0x80 to 0xcc */ +static const u32 sbridge_dram_rule[] = { + 0x80, 0x88, 0x90, 0x98, 0xa0, + 0xa8, 0xb0, 0xb8, 0xc0, 0xc8, +}; + +static const u32 ibridge_dram_rule[] = { + 0x60, 0x68, 0x70, 0x78, 0x80, + 0x88, 0x90, 0x98, 0xa0, 0xa8, + 0xb0, 0xb8, 0xc0, 0xc8, 0xd0, + 0xd8, 0xe0, 0xe8, 0xf0, 0xf8, +}; + +#define SAD_LIMIT(reg) ((GET_BITFIELD(reg, 6, 25) << 26) | 0x3ffffff) +#define DRAM_ATTR(reg) GET_BITFIELD(reg, 2, 3) +#define INTERLEAVE_MODE(reg) GET_BITFIELD(reg, 1, 1) +#define DRAM_RULE_ENABLE(reg) GET_BITFIELD(reg, 0, 0) +#define A7MODE(reg) GET_BITFIELD(reg, 26, 26) + +static char *get_dram_attr(u32 reg) +{ + switch(DRAM_ATTR(reg)) { + case 0: + return "DRAM"; + case 1: + return "MMCFG"; + case 2: + return "NXM"; + default: + return "unknown"; + } +} + +static const u32 sbridge_interleave_list[] = { + 0x84, 0x8c, 0x94, 0x9c, 0xa4, + 0xac, 0xb4, 0xbc, 0xc4, 0xcc, +}; + +static const u32 ibridge_interleave_list[] = { + 0x64, 0x6c, 0x74, 0x7c, 0x84, + 0x8c, 0x94, 0x9c, 0xa4, 0xac, + 0xb4, 0xbc, 0xc4, 0xcc, 0xd4, + 0xdc, 0xe4, 0xec, 0xf4, 0xfc, +}; + +struct interleave_pkg { + unsigned char start; + unsigned char end; +}; + +static const struct interleave_pkg sbridge_interleave_pkg[] = { + { 0, 2 }, + { 3, 5 }, + { 8, 10 }, + { 11, 13 }, + { 16, 18 }, + { 19, 21 }, + { 24, 26 }, + { 27, 29 }, +}; + +static const struct interleave_pkg ibridge_interleave_pkg[] = { + { 0, 3 }, + { 4, 7 }, + { 8, 11 }, + { 12, 15 }, + { 16, 19 }, + { 20, 23 }, + { 24, 27 }, + { 28, 31 }, +}; + +static inline int sad_pkg(const struct interleave_pkg *table, u32 reg, + int interleave) +{ + return GET_BITFIELD(reg, table[interleave].start, + table[interleave].end); +} + +/* Devices 12 Function 7 */ + +#define TOLM 0x80 +#define TOHM 0x84 +#define HASWELL_TOLM 0xd0 +#define HASWELL_TOHM_0 0xd4 +#define HASWELL_TOHM_1 0xd8 + +#define GET_TOLM(reg) ((GET_BITFIELD(reg, 0, 3) << 28) | 0x3ffffff) +#define GET_TOHM(reg) ((GET_BITFIELD(reg, 0, 20) << 25) | 0x3ffffff) + +/* Device 13 Function 6 */ + +#define SAD_TARGET 0xf0 + +#define SOURCE_ID(reg) GET_BITFIELD(reg, 9, 11) + +#define SAD_CONTROL 0xf4 + +/* Device 14 function 0 */ + +static const u32 tad_dram_rule[] = { + 0x40, 0x44, 0x48, 0x4c, + 0x50, 0x54, 0x58, 0x5c, + 0x60, 0x64, 0x68, 0x6c, +}; +#define MAX_TAD ARRAY_SIZE(tad_dram_rule) + +#define TAD_LIMIT(reg) ((GET_BITFIELD(reg, 12, 31) << 26) | 0x3ffffff) +#define TAD_SOCK(reg) GET_BITFIELD(reg, 10, 11) +#define TAD_CH(reg) GET_BITFIELD(reg, 8, 9) +#define TAD_TGT3(reg) GET_BITFIELD(reg, 6, 7) +#define TAD_TGT2(reg) GET_BITFIELD(reg, 4, 5) +#define TAD_TGT1(reg) GET_BITFIELD(reg, 2, 3) +#define TAD_TGT0(reg) GET_BITFIELD(reg, 0, 1) + +/* Device 15, function 0 */ + +#define MCMTR 0x7c + +#define IS_ECC_ENABLED(mcmtr) GET_BITFIELD(mcmtr, 2, 2) +#define IS_LOCKSTEP_ENABLED(mcmtr) GET_BITFIELD(mcmtr, 1, 1) +#define IS_CLOSE_PG(mcmtr) GET_BITFIELD(mcmtr, 0, 0) + +/* Device 15, function 1 */ + +#define RASENABLES 0xac +#define IS_MIRROR_ENABLED(reg) GET_BITFIELD(reg, 0, 0) + +/* Device 15, functions 2-5 */ + +static const int mtr_regs[] = { + 0x80, 0x84, 0x88, +}; + +#define RANK_DISABLE(mtr) GET_BITFIELD(mtr, 16, 19) +#define IS_DIMM_PRESENT(mtr) GET_BITFIELD(mtr, 14, 14) +#define RANK_CNT_BITS(mtr) GET_BITFIELD(mtr, 12, 13) +#define RANK_WIDTH_BITS(mtr) GET_BITFIELD(mtr, 2, 4) +#define COL_WIDTH_BITS(mtr) GET_BITFIELD(mtr, 0, 1) + +static const u32 tad_ch_nilv_offset[] = { + 0x90, 0x94, 0x98, 0x9c, + 0xa0, 0xa4, 0xa8, 0xac, + 0xb0, 0xb4, 0xb8, 0xbc, +}; +#define CHN_IDX_OFFSET(reg) GET_BITFIELD(reg, 28, 29) +#define TAD_OFFSET(reg) (GET_BITFIELD(reg, 6, 25) << 26) + +static const u32 rir_way_limit[] = { + 0x108, 0x10c, 0x110, 0x114, 0x118, +}; +#define MAX_RIR_RANGES ARRAY_SIZE(rir_way_limit) + +#define IS_RIR_VALID(reg) GET_BITFIELD(reg, 31, 31) +#define RIR_WAY(reg) GET_BITFIELD(reg, 28, 29) + +#define MAX_RIR_WAY 8 + +static const u32 rir_offset[MAX_RIR_RANGES][MAX_RIR_WAY] = { + { 0x120, 0x124, 0x128, 0x12c, 0x130, 0x134, 0x138, 0x13c }, + { 0x140, 0x144, 0x148, 0x14c, 0x150, 0x154, 0x158, 0x15c }, + { 0x160, 0x164, 0x168, 0x16c, 0x170, 0x174, 0x178, 0x17c }, + { 0x180, 0x184, 0x188, 0x18c, 0x190, 0x194, 0x198, 0x19c }, + { 0x1a0, 0x1a4, 0x1a8, 0x1ac, 0x1b0, 0x1b4, 0x1b8, 0x1bc }, +}; + +#define RIR_RNK_TGT(reg) GET_BITFIELD(reg, 16, 19) +#define RIR_OFFSET(reg) GET_BITFIELD(reg, 2, 14) + +/* Device 16, functions 2-7 */ + +/* + * FIXME: Implement the error count reads directly + */ + +static const u32 correrrcnt[] = { + 0x104, 0x108, 0x10c, 0x110, +}; + +#define RANK_ODD_OV(reg) GET_BITFIELD(reg, 31, 31) +#define RANK_ODD_ERR_CNT(reg) GET_BITFIELD(reg, 16, 30) +#define RANK_EVEN_OV(reg) GET_BITFIELD(reg, 15, 15) +#define RANK_EVEN_ERR_CNT(reg) GET_BITFIELD(reg, 0, 14) + +static const u32 correrrthrsld[] = { + 0x11c, 0x120, 0x124, 0x128, +}; + +#define RANK_ODD_ERR_THRSLD(reg) GET_BITFIELD(reg, 16, 30) +#define RANK_EVEN_ERR_THRSLD(reg) GET_BITFIELD(reg, 0, 14) + + +/* Device 17, function 0 */ + +#define SB_RANK_CFG_A 0x0328 + +#define IB_RANK_CFG_A 0x0320 + +/* + * sbridge structs + */ + +#define NUM_CHANNELS 4 +#define MAX_DIMMS 3 /* Max DIMMS per channel */ +#define CHANNEL_UNSPECIFIED 0xf /* Intel IA32 SDM 15-14 */ + +enum type { + SANDY_BRIDGE, + IVY_BRIDGE, + HASWELL, + BROADWELL, +}; + +struct sbridge_pvt; +struct sbridge_info { + enum type type; + u32 mcmtr; + u32 rankcfgr; + u64 (*get_tolm)(struct sbridge_pvt *pvt); + u64 (*get_tohm)(struct sbridge_pvt *pvt); + u64 (*rir_limit)(u32 reg); + const u32 *dram_rule; + const u32 *interleave_list; + const struct interleave_pkg *interleave_pkg; + u8 max_sad; + u8 max_interleave; + u8 (*get_node_id)(struct sbridge_pvt *pvt); + enum mem_type (*get_memory_type)(struct sbridge_pvt *pvt); + struct pci_dev *pci_vtd; +}; + +struct sbridge_channel { + u32 ranks; + u32 dimms; +}; + +struct pci_id_descr { + int dev_id; + int optional; +}; + +struct pci_id_table { + const struct pci_id_descr *descr; + int n_devs; +}; + +struct sbridge_dev { + struct list_head list; + u8 bus, mc; + u8 node_id, source_id; + struct pci_dev **pdev; + int n_devs; + struct mem_ctl_info *mci; +}; + +struct sbridge_pvt { + struct pci_dev *pci_ta, *pci_ddrio, *pci_ras; + struct pci_dev *pci_sad0, *pci_sad1; + struct pci_dev *pci_ha0, *pci_ha1; + struct pci_dev *pci_br0, *pci_br1; + struct pci_dev *pci_ha1_ta; + struct pci_dev *pci_tad[NUM_CHANNELS]; + + struct sbridge_dev *sbridge_dev; + + struct sbridge_info info; + struct sbridge_channel channel[NUM_CHANNELS]; + + /* Memory type detection */ + bool is_mirrored, is_lockstep, is_close_pg; + + /* Fifo double buffers */ + struct mce mce_entry[MCE_LOG_LEN]; + struct mce mce_outentry[MCE_LOG_LEN]; + + /* Fifo in/out counters */ + unsigned mce_in, mce_out; + + /* Count indicator to show errors not got */ + unsigned mce_overrun; + + /* Memory description */ + u64 tolm, tohm; +}; + +#define PCI_DESCR(device_id, opt) \ + .dev_id = (device_id), \ + .optional = opt + +static const struct pci_id_descr pci_dev_descr_sbridge[] = { + /* Processor Home Agent */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0, 0) }, + + /* Memory controller */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_RAS, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD1, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD2, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD3, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_DDRIO, 1) }, + + /* System Address Decoder */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_SAD0, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_SAD1, 0) }, + + /* Broadcast Registers */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_SBRIDGE_BR, 0) }, +}; + +#define PCI_ID_TABLE_ENTRY(A) { .descr=A, .n_devs = ARRAY_SIZE(A) } +static const struct pci_id_table pci_dev_descr_sbridge_table[] = { + PCI_ID_TABLE_ENTRY(pci_dev_descr_sbridge), + {0,} /* 0 terminated list. */ +}; + +/* This changes depending if 1HA or 2HA: + * 1HA: + * 0x0eb8 (17.0) is DDRIO0 + * 2HA: + * 0x0ebc (17.4) is DDRIO0 + */ +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_1HA_DDRIO0 0x0eb8 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_2HA_DDRIO0 0x0ebc + +/* pci ids */ +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0 0x0ea0 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA 0x0ea8 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_RAS 0x0e71 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD0 0x0eaa +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD1 0x0eab +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD2 0x0eac +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD3 0x0ead +#define PCI_DEVICE_ID_INTEL_IBRIDGE_SAD 0x0ec8 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_BR0 0x0ec9 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_BR1 0x0eca +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1 0x0e60 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TA 0x0e68 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_RAS 0x0e79 +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD0 0x0e6a +#define PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD1 0x0e6b + +static const struct pci_id_descr pci_dev_descr_ibridge[] = { + /* Processor Home Agent */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0, 0) }, + + /* Memory controller */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_RAS, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD0, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD1, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD2, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD3, 0) }, + + /* System Address Decoder */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_SAD, 0) }, + + /* Broadcast Registers */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_BR0, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_BR1, 0) }, + + /* Optional, mode 2HA */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1, 1) }, +#if 0 + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TA, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_RAS, 1) }, +#endif + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD0, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD1, 1) }, + + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_1HA_DDRIO0, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_2HA_DDRIO0, 1) }, +}; + +static const struct pci_id_table pci_dev_descr_ibridge_table[] = { + PCI_ID_TABLE_ENTRY(pci_dev_descr_ibridge), + {0,} /* 0 terminated list. */ +}; + +/* Haswell support */ +/* EN processor: + * - 1 IMC + * - 3 DDR3 channels, 2 DPC per channel + * EP processor: + * - 1 or 2 IMC + * - 4 DDR4 channels, 3 DPC per channel + * EP 4S processor: + * - 2 IMC + * - 4 DDR4 channels, 3 DPC per channel + * EX processor: + * - 2 IMC + * - each IMC interfaces with a SMI 2 channel + * - each SMI channel interfaces with a scalable memory buffer + * - each scalable memory buffer supports 4 DDR3/DDR4 channels, 3 DPC + */ +#define HASWELL_DDRCRCLKCONTROLS 0xa10 /* Ditto on Broadwell */ +#define HASWELL_HASYSDEFEATURE2 0x84 +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_VTD_MISC 0x2f28 +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0 0x2fa0 +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1 0x2f60 +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TA 0x2fa8 +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_THERMAL 0x2f71 +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TA 0x2f68 +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_THERMAL 0x2f79 +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD0 0x2ffc +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD1 0x2ffd +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD0 0x2faa +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD1 0x2fab +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD2 0x2fac +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD3 0x2fad +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD0 0x2f6a +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD1 0x2f6b +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD2 0x2f6c +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD3 0x2f6d +#define PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO0 0x2fbd +static const struct pci_id_descr pci_dev_descr_haswell[] = { + /* first item must be the HA */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0, 0) }, + + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD0, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD1, 0) }, + + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1, 1) }, + + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TA, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_THERMAL, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD0, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD1, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD2, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD3, 1) }, + + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO0, 1) }, + + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TA, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_THERMAL, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD0, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD1, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD2, 1) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD3, 1) }, +}; + +static const struct pci_id_table pci_dev_descr_haswell_table[] = { + PCI_ID_TABLE_ENTRY(pci_dev_descr_haswell), + {0,} /* 0 terminated list. */ +}; + +/* + * Broadwell support + * + * DE processor: + * - 1 IMC + * - 2 DDR3 channels, 2 DPC per channel + */ +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_VTD_MISC 0x6f28 +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0 0x6fa0 +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TA 0x6fa8 +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_THERMAL 0x6f71 +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD0 0x6ffc +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD1 0x6ffd +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD0 0x6faa +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD1 0x6fab +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD2 0x6fac +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD3 0x6fad +#define PCI_DEVICE_ID_INTEL_BROADWELL_IMC_DDRIO0 0x6faf + +static const struct pci_id_descr pci_dev_descr_broadwell[] = { + /* first item must be the HA */ + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0, 0) }, + + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD0, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD1, 0) }, + + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TA, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_THERMAL, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD0, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD1, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD2, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD3, 0) }, + { PCI_DESCR(PCI_DEVICE_ID_INTEL_BROADWELL_IMC_DDRIO0, 1) }, +}; + +static const struct pci_id_table pci_dev_descr_broadwell_table[] = { + PCI_ID_TABLE_ENTRY(pci_dev_descr_broadwell), + {0,} /* 0 terminated list. */ +}; + +/* + * pci_device_id table for which devices we are looking for + */ +static const struct pci_device_id sbridge_pci_tbl[] = { + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0)}, + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0)}, + {0,} /* 0 terminated list. */ +}; + + +/**************************************************************************** + Ancillary status routines + ****************************************************************************/ + +static inline int numrank(enum type type, u32 mtr) +{ + int ranks = (1 << RANK_CNT_BITS(mtr)); + int max = 4; + + if (type == HASWELL) + max = 8; + + if (ranks > max) { + edac_dbg(0, "Invalid number of ranks: %d (max = %i) raw value = %x (%04x)\n", + ranks, max, (unsigned int)RANK_CNT_BITS(mtr), mtr); + return -EINVAL; + } + + return ranks; +} + +static inline int numrow(u32 mtr) +{ + int rows = (RANK_WIDTH_BITS(mtr) + 12); + + if (rows < 13 || rows > 18) { + edac_dbg(0, "Invalid number of rows: %d (should be between 14 and 17) raw value = %x (%04x)\n", + rows, (unsigned int)RANK_WIDTH_BITS(mtr), mtr); + return -EINVAL; + } + + return 1 << rows; +} + +static inline int numcol(u32 mtr) +{ + int cols = (COL_WIDTH_BITS(mtr) + 10); + + if (cols > 12) { + edac_dbg(0, "Invalid number of cols: %d (max = 4) raw value = %x (%04x)\n", + cols, (unsigned int)COL_WIDTH_BITS(mtr), mtr); + return -EINVAL; + } + + return 1 << cols; +} + +static struct sbridge_dev *get_sbridge_dev(u8 bus) +{ + struct sbridge_dev *sbridge_dev; + + list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) { + if (sbridge_dev->bus == bus) + return sbridge_dev; + } + + return NULL; +} + +static struct sbridge_dev *alloc_sbridge_dev(u8 bus, + const struct pci_id_table *table) +{ + struct sbridge_dev *sbridge_dev; + + sbridge_dev = kzalloc(sizeof(*sbridge_dev), GFP_KERNEL); + if (!sbridge_dev) + return NULL; + + sbridge_dev->pdev = kzalloc(sizeof(*sbridge_dev->pdev) * table->n_devs, + GFP_KERNEL); + if (!sbridge_dev->pdev) { + kfree(sbridge_dev); + return NULL; + } + + sbridge_dev->bus = bus; + sbridge_dev->n_devs = table->n_devs; + list_add_tail(&sbridge_dev->list, &sbridge_edac_list); + + return sbridge_dev; +} + +static void free_sbridge_dev(struct sbridge_dev *sbridge_dev) +{ + list_del(&sbridge_dev->list); + kfree(sbridge_dev->pdev); + kfree(sbridge_dev); +} + +static u64 sbridge_get_tolm(struct sbridge_pvt *pvt) +{ + u32 reg; + + /* Address range is 32:28 */ + pci_read_config_dword(pvt->pci_sad1, TOLM, ®); + return GET_TOLM(reg); +} + +static u64 sbridge_get_tohm(struct sbridge_pvt *pvt) +{ + u32 reg; + + pci_read_config_dword(pvt->pci_sad1, TOHM, ®); + return GET_TOHM(reg); +} + +static u64 ibridge_get_tolm(struct sbridge_pvt *pvt) +{ + u32 reg; + + pci_read_config_dword(pvt->pci_br1, TOLM, ®); + + return GET_TOLM(reg); +} + +static u64 ibridge_get_tohm(struct sbridge_pvt *pvt) +{ + u32 reg; + + pci_read_config_dword(pvt->pci_br1, TOHM, ®); + + return GET_TOHM(reg); +} + +static u64 rir_limit(u32 reg) +{ + return ((u64)GET_BITFIELD(reg, 1, 10) << 29) | 0x1fffffff; +} + +static enum mem_type get_memory_type(struct sbridge_pvt *pvt) +{ + u32 reg; + enum mem_type mtype; + + if (pvt->pci_ddrio) { + pci_read_config_dword(pvt->pci_ddrio, pvt->info.rankcfgr, + ®); + if (GET_BITFIELD(reg, 11, 11)) + /* FIXME: Can also be LRDIMM */ + mtype = MEM_RDDR3; + else + mtype = MEM_DDR3; + } else + mtype = MEM_UNKNOWN; + + return mtype; +} + +static enum mem_type haswell_get_memory_type(struct sbridge_pvt *pvt) +{ + u32 reg; + bool registered = false; + enum mem_type mtype = MEM_UNKNOWN; + + if (!pvt->pci_ddrio) + goto out; + + pci_read_config_dword(pvt->pci_ddrio, + HASWELL_DDRCRCLKCONTROLS, ®); + /* Is_Rdimm */ + if (GET_BITFIELD(reg, 16, 16)) + registered = true; + + pci_read_config_dword(pvt->pci_ta, MCMTR, ®); + if (GET_BITFIELD(reg, 14, 14)) { + if (registered) + mtype = MEM_RDDR4; + else + mtype = MEM_DDR4; + } else { + if (registered) + mtype = MEM_RDDR3; + else + mtype = MEM_DDR3; + } + +out: + return mtype; +} + +static u8 get_node_id(struct sbridge_pvt *pvt) +{ + u32 reg; + pci_read_config_dword(pvt->pci_br0, SAD_CONTROL, ®); + return GET_BITFIELD(reg, 0, 2); +} + +static u8 haswell_get_node_id(struct sbridge_pvt *pvt) +{ + u32 reg; + + pci_read_config_dword(pvt->pci_sad1, SAD_CONTROL, ®); + return GET_BITFIELD(reg, 0, 3); +} + +static u64 haswell_get_tolm(struct sbridge_pvt *pvt) +{ + u32 reg; + + pci_read_config_dword(pvt->info.pci_vtd, HASWELL_TOLM, ®); + return (GET_BITFIELD(reg, 26, 31) << 26) | 0x3ffffff; +} + +static u64 haswell_get_tohm(struct sbridge_pvt *pvt) +{ + u64 rc; + u32 reg; + + pci_read_config_dword(pvt->info.pci_vtd, HASWELL_TOHM_0, ®); + rc = GET_BITFIELD(reg, 26, 31); + pci_read_config_dword(pvt->info.pci_vtd, HASWELL_TOHM_1, ®); + rc = ((reg << 6) | rc) << 26; + + return rc | 0x1ffffff; +} + +static u64 haswell_rir_limit(u32 reg) +{ + return (((u64)GET_BITFIELD(reg, 1, 11) + 1) << 29) - 1; +} + +static inline u8 sad_pkg_socket(u8 pkg) +{ + /* on Ivy Bridge, nodeID is SASS, where A is HA and S is node id */ + return ((pkg >> 3) << 2) | (pkg & 0x3); +} + +static inline u8 sad_pkg_ha(u8 pkg) +{ + return (pkg >> 2) & 0x1; +} + +/**************************************************************************** + Memory check routines + ****************************************************************************/ +static struct pci_dev *get_pdev_same_bus(u8 bus, u32 id) +{ + struct pci_dev *pdev = NULL; + + do { + pdev = pci_get_device(PCI_VENDOR_ID_INTEL, id, pdev); + if (pdev && pdev->bus->number == bus) + break; + } while (pdev); + + return pdev; +} + +/** + * check_if_ecc_is_active() - Checks if ECC is active + * @bus: Device bus + * @type: Memory controller type + * returns: 0 in case ECC is active, -ENODEV if it can't be determined or + * disabled + */ +static int check_if_ecc_is_active(const u8 bus, enum type type) +{ + struct pci_dev *pdev = NULL; + u32 mcmtr, id; + + switch (type) { + case IVY_BRIDGE: + id = PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA; + break; + case HASWELL: + id = PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TA; + break; + case SANDY_BRIDGE: + id = PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA; + break; + case BROADWELL: + id = PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TA; + break; + default: + return -ENODEV; + } + + pdev = get_pdev_same_bus(bus, id); + if (!pdev) { + sbridge_printk(KERN_ERR, "Couldn't find PCI device " + "%04x:%04x! on bus %02d\n", + PCI_VENDOR_ID_INTEL, id, bus); + return -ENODEV; + } + + pci_read_config_dword(pdev, MCMTR, &mcmtr); + if (!IS_ECC_ENABLED(mcmtr)) { + sbridge_printk(KERN_ERR, "ECC is disabled. Aborting\n"); + return -ENODEV; + } + return 0; +} + +static int get_dimm_config(struct mem_ctl_info *mci) +{ + struct sbridge_pvt *pvt = mci->pvt_info; + struct dimm_info *dimm; + unsigned i, j, banks, ranks, rows, cols, npages; + u64 size; + u32 reg; + enum edac_type mode; + enum mem_type mtype; + + if (pvt->info.type == HASWELL || pvt->info.type == BROADWELL) + pci_read_config_dword(pvt->pci_sad1, SAD_TARGET, ®); + else + pci_read_config_dword(pvt->pci_br0, SAD_TARGET, ®); + + pvt->sbridge_dev->source_id = SOURCE_ID(reg); + + pvt->sbridge_dev->node_id = pvt->info.get_node_id(pvt); + edac_dbg(0, "mc#%d: Node ID: %d, source ID: %d\n", + pvt->sbridge_dev->mc, + pvt->sbridge_dev->node_id, + pvt->sbridge_dev->source_id); + + pci_read_config_dword(pvt->pci_ras, RASENABLES, ®); + if (IS_MIRROR_ENABLED(reg)) { + edac_dbg(0, "Memory mirror is enabled\n"); + pvt->is_mirrored = true; + } else { + edac_dbg(0, "Memory mirror is disabled\n"); + pvt->is_mirrored = false; + } + + pci_read_config_dword(pvt->pci_ta, MCMTR, &pvt->info.mcmtr); + if (IS_LOCKSTEP_ENABLED(pvt->info.mcmtr)) { + edac_dbg(0, "Lockstep is enabled\n"); + mode = EDAC_S8ECD8ED; + pvt->is_lockstep = true; + } else { + edac_dbg(0, "Lockstep is disabled\n"); + mode = EDAC_S4ECD4ED; + pvt->is_lockstep = false; + } + if (IS_CLOSE_PG(pvt->info.mcmtr)) { + edac_dbg(0, "address map is on closed page mode\n"); + pvt->is_close_pg = true; + } else { + edac_dbg(0, "address map is on open page mode\n"); + pvt->is_close_pg = false; + } + + mtype = pvt->info.get_memory_type(pvt); + if (mtype == MEM_RDDR3 || mtype == MEM_RDDR4) + edac_dbg(0, "Memory is registered\n"); + else if (mtype == MEM_UNKNOWN) + edac_dbg(0, "Cannot determine memory type\n"); + else + edac_dbg(0, "Memory is unregistered\n"); + + if (mtype == MEM_DDR4 || mtype == MEM_RDDR4) + banks = 16; + else + banks = 8; + + for (i = 0; i < NUM_CHANNELS; i++) { + u32 mtr; + + for (j = 0; j < ARRAY_SIZE(mtr_regs); j++) { + dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, + i, j, 0); + pci_read_config_dword(pvt->pci_tad[i], + mtr_regs[j], &mtr); + edac_dbg(4, "Channel #%d MTR%d = %x\n", i, j, mtr); + if (IS_DIMM_PRESENT(mtr)) { + pvt->channel[i].dimms++; + + ranks = numrank(pvt->info.type, mtr); + rows = numrow(mtr); + cols = numcol(mtr); + + size = ((u64)rows * cols * banks * ranks) >> (20 - 3); + npages = MiB_TO_PAGES(size); + + edac_dbg(0, "mc#%d: channel %d, dimm %d, %Ld Mb (%d pages) bank: %d, rank: %d, row: %#x, col: %#x\n", + pvt->sbridge_dev->mc, i, j, + size, npages, + banks, ranks, rows, cols); + + dimm->nr_pages = npages; + dimm->grain = 32; + switch (banks) { + case 16: + dimm->dtype = DEV_X16; + break; + case 8: + dimm->dtype = DEV_X8; + break; + case 4: + dimm->dtype = DEV_X4; + break; + } + dimm->mtype = mtype; + dimm->edac_mode = mode; + snprintf(dimm->label, sizeof(dimm->label), + "CPU_SrcID#%u_Channel#%u_DIMM#%u", + pvt->sbridge_dev->source_id, i, j); + } + } + } + + return 0; +} + +static void get_memory_layout(const struct mem_ctl_info *mci) +{ + struct sbridge_pvt *pvt = mci->pvt_info; + int i, j, k, n_sads, n_tads, sad_interl; + u32 reg; + u64 limit, prv = 0; + u64 tmp_mb; + u32 gb, mb; + u32 rir_way; + + /* + * Step 1) Get TOLM/TOHM ranges + */ + + pvt->tolm = pvt->info.get_tolm(pvt); + tmp_mb = (1 + pvt->tolm) >> 20; + + gb = div_u64_rem(tmp_mb, 1024, &mb); + edac_dbg(0, "TOLM: %u.%03u GB (0x%016Lx)\n", + gb, (mb*1000)/1024, (u64)pvt->tolm); + + /* Address range is already 45:25 */ + pvt->tohm = pvt->info.get_tohm(pvt); + tmp_mb = (1 + pvt->tohm) >> 20; + + gb = div_u64_rem(tmp_mb, 1024, &mb); + edac_dbg(0, "TOHM: %u.%03u GB (0x%016Lx)\n", + gb, (mb*1000)/1024, (u64)pvt->tohm); + + /* + * Step 2) Get SAD range and SAD Interleave list + * TAD registers contain the interleave wayness. However, it + * seems simpler to just discover it indirectly, with the + * algorithm bellow. + */ + prv = 0; + for (n_sads = 0; n_sads < pvt->info.max_sad; n_sads++) { + /* SAD_LIMIT Address range is 45:26 */ + pci_read_config_dword(pvt->pci_sad0, pvt->info.dram_rule[n_sads], + ®); + limit = SAD_LIMIT(reg); + + if (!DRAM_RULE_ENABLE(reg)) + continue; + + if (limit <= prv) + break; + + tmp_mb = (limit + 1) >> 20; + gb = div_u64_rem(tmp_mb, 1024, &mb); + edac_dbg(0, "SAD#%d %s up to %u.%03u GB (0x%016Lx) Interleave: %s reg=0x%08x\n", + n_sads, + get_dram_attr(reg), + gb, (mb*1000)/1024, + ((u64)tmp_mb) << 20L, + INTERLEAVE_MODE(reg) ? "8:6" : "[8:6]XOR[18:16]", + reg); + prv = limit; + + pci_read_config_dword(pvt->pci_sad0, pvt->info.interleave_list[n_sads], + ®); + sad_interl = sad_pkg(pvt->info.interleave_pkg, reg, 0); + for (j = 0; j < 8; j++) { + u32 pkg = sad_pkg(pvt->info.interleave_pkg, reg, j); + if (j > 0 && sad_interl == pkg) + break; + + edac_dbg(0, "SAD#%d, interleave #%d: %d\n", + n_sads, j, pkg); + } + } + + /* + * Step 3) Get TAD range + */ + prv = 0; + for (n_tads = 0; n_tads < MAX_TAD; n_tads++) { + pci_read_config_dword(pvt->pci_ha0, tad_dram_rule[n_tads], + ®); + limit = TAD_LIMIT(reg); + if (limit <= prv) + break; + tmp_mb = (limit + 1) >> 20; + + gb = div_u64_rem(tmp_mb, 1024, &mb); + edac_dbg(0, "TAD#%d: up to %u.%03u GB (0x%016Lx), socket interleave %d, memory interleave %d, TGT: %d, %d, %d, %d, reg=0x%08x\n", + n_tads, gb, (mb*1000)/1024, + ((u64)tmp_mb) << 20L, + (u32)TAD_SOCK(reg), + (u32)TAD_CH(reg), + (u32)TAD_TGT0(reg), + (u32)TAD_TGT1(reg), + (u32)TAD_TGT2(reg), + (u32)TAD_TGT3(reg), + reg); + prv = limit; + } + + /* + * Step 4) Get TAD offsets, per each channel + */ + for (i = 0; i < NUM_CHANNELS; i++) { + if (!pvt->channel[i].dimms) + continue; + for (j = 0; j < n_tads; j++) { + pci_read_config_dword(pvt->pci_tad[i], + tad_ch_nilv_offset[j], + ®); + tmp_mb = TAD_OFFSET(reg) >> 20; + gb = div_u64_rem(tmp_mb, 1024, &mb); + edac_dbg(0, "TAD CH#%d, offset #%d: %u.%03u GB (0x%016Lx), reg=0x%08x\n", + i, j, + gb, (mb*1000)/1024, + ((u64)tmp_mb) << 20L, + reg); + } + } + + /* + * Step 6) Get RIR Wayness/Limit, per each channel + */ + for (i = 0; i < NUM_CHANNELS; i++) { + if (!pvt->channel[i].dimms) + continue; + for (j = 0; j < MAX_RIR_RANGES; j++) { + pci_read_config_dword(pvt->pci_tad[i], + rir_way_limit[j], + ®); + + if (!IS_RIR_VALID(reg)) + continue; + + tmp_mb = pvt->info.rir_limit(reg) >> 20; + rir_way = 1 << RIR_WAY(reg); + gb = div_u64_rem(tmp_mb, 1024, &mb); + edac_dbg(0, "CH#%d RIR#%d, limit: %u.%03u GB (0x%016Lx), way: %d, reg=0x%08x\n", + i, j, + gb, (mb*1000)/1024, + ((u64)tmp_mb) << 20L, + rir_way, + reg); + + for (k = 0; k < rir_way; k++) { + pci_read_config_dword(pvt->pci_tad[i], + rir_offset[j][k], + ®); + tmp_mb = RIR_OFFSET(reg) << 6; + + gb = div_u64_rem(tmp_mb, 1024, &mb); + edac_dbg(0, "CH#%d RIR#%d INTL#%d, offset %u.%03u GB (0x%016Lx), tgt: %d, reg=0x%08x\n", + i, j, k, + gb, (mb*1000)/1024, + ((u64)tmp_mb) << 20L, + (u32)RIR_RNK_TGT(reg), + reg); + } + } + } +} + +static struct mem_ctl_info *get_mci_for_node_id(u8 node_id) +{ + struct sbridge_dev *sbridge_dev; + + list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) { + if (sbridge_dev->node_id == node_id) + return sbridge_dev->mci; + } + return NULL; +} + +static int get_memory_error_data(struct mem_ctl_info *mci, + u64 addr, + u8 *socket, + long *channel_mask, + u8 *rank, + char **area_type, char *msg) +{ + struct mem_ctl_info *new_mci; + struct sbridge_pvt *pvt = mci->pvt_info; + struct pci_dev *pci_ha; + int n_rir, n_sads, n_tads, sad_way, sck_xch; + int sad_interl, idx, base_ch; + int interleave_mode, shiftup = 0; + unsigned sad_interleave[pvt->info.max_interleave]; + u32 reg, dram_rule; + u8 ch_way, sck_way, pkg, sad_ha = 0; + u32 tad_offset; + u32 rir_way; + u32 mb, gb; + u64 ch_addr, offset, limit = 0, prv = 0; + + + /* + * Step 0) Check if the address is at special memory ranges + * The check bellow is probably enough to fill all cases where + * the error is not inside a memory, except for the legacy + * range (e. g. VGA addresses). It is unlikely, however, that the + * memory controller would generate an error on that range. + */ + if ((addr > (u64) pvt->tolm) && (addr < (1LL << 32))) { + sprintf(msg, "Error at TOLM area, on addr 0x%08Lx", addr); + return -EINVAL; + } + if (addr >= (u64)pvt->tohm) { + sprintf(msg, "Error at MMIOH area, on addr 0x%016Lx", addr); + return -EINVAL; + } + + /* + * Step 1) Get socket + */ + for (n_sads = 0; n_sads < pvt->info.max_sad; n_sads++) { + pci_read_config_dword(pvt->pci_sad0, pvt->info.dram_rule[n_sads], + ®); + + if (!DRAM_RULE_ENABLE(reg)) + continue; + + limit = SAD_LIMIT(reg); + if (limit <= prv) { + sprintf(msg, "Can't discover the memory socket"); + return -EINVAL; + } + if (addr <= limit) + break; + prv = limit; + } + if (n_sads == pvt->info.max_sad) { + sprintf(msg, "Can't discover the memory socket"); + return -EINVAL; + } + dram_rule = reg; + *area_type = get_dram_attr(dram_rule); + interleave_mode = INTERLEAVE_MODE(dram_rule); + + pci_read_config_dword(pvt->pci_sad0, pvt->info.interleave_list[n_sads], + ®); + + if (pvt->info.type == SANDY_BRIDGE) { + sad_interl = sad_pkg(pvt->info.interleave_pkg, reg, 0); + for (sad_way = 0; sad_way < 8; sad_way++) { + u32 pkg = sad_pkg(pvt->info.interleave_pkg, reg, sad_way); + if (sad_way > 0 && sad_interl == pkg) + break; + sad_interleave[sad_way] = pkg; + edac_dbg(0, "SAD interleave #%d: %d\n", + sad_way, sad_interleave[sad_way]); + } + edac_dbg(0, "mc#%d: Error detected on SAD#%d: address 0x%016Lx < 0x%016Lx, Interleave [%d:6]%s\n", + pvt->sbridge_dev->mc, + n_sads, + addr, + limit, + sad_way + 7, + !interleave_mode ? "" : "XOR[18:16]"); + if (interleave_mode) + idx = ((addr >> 6) ^ (addr >> 16)) & 7; + else + idx = (addr >> 6) & 7; + switch (sad_way) { + case 1: + idx = 0; + break; + case 2: + idx = idx & 1; + break; + case 4: + idx = idx & 3; + break; + case 8: + break; + default: + sprintf(msg, "Can't discover socket interleave"); + return -EINVAL; + } + *socket = sad_interleave[idx]; + edac_dbg(0, "SAD interleave index: %d (wayness %d) = CPU socket %d\n", + idx, sad_way, *socket); + } else if (pvt->info.type == HASWELL || pvt->info.type == BROADWELL) { + int bits, a7mode = A7MODE(dram_rule); + + if (a7mode) { + /* A7 mode swaps P9 with P6 */ + bits = GET_BITFIELD(addr, 7, 8) << 1; + bits |= GET_BITFIELD(addr, 9, 9); + } else + bits = GET_BITFIELD(addr, 7, 9); + + if (interleave_mode) { + /* interleave mode will XOR {8,7,6} with {18,17,16} */ + idx = GET_BITFIELD(addr, 16, 18); + idx ^= bits; + } else + idx = bits; + + pkg = sad_pkg(pvt->info.interleave_pkg, reg, idx); + *socket = sad_pkg_socket(pkg); + sad_ha = sad_pkg_ha(pkg); + + if (a7mode) { + /* MCChanShiftUpEnable */ + pci_read_config_dword(pvt->pci_ha0, + HASWELL_HASYSDEFEATURE2, ®); + shiftup = GET_BITFIELD(reg, 22, 22); + } + + edac_dbg(0, "SAD interleave package: %d = CPU socket %d, HA %i, shiftup: %i\n", + idx, *socket, sad_ha, shiftup); + } else { + /* Ivy Bridge's SAD mode doesn't support XOR interleave mode */ + idx = (addr >> 6) & 7; + pkg = sad_pkg(pvt->info.interleave_pkg, reg, idx); + *socket = sad_pkg_socket(pkg); + sad_ha = sad_pkg_ha(pkg); + edac_dbg(0, "SAD interleave package: %d = CPU socket %d, HA %d\n", + idx, *socket, sad_ha); + } + + /* + * Move to the proper node structure, in order to access the + * right PCI registers + */ + new_mci = get_mci_for_node_id(*socket); + if (!new_mci) { + sprintf(msg, "Struct for socket #%u wasn't initialized", + *socket); + return -EINVAL; + } + mci = new_mci; + pvt = mci->pvt_info; + + /* + * Step 2) Get memory channel + */ + prv = 0; + if (pvt->info.type == SANDY_BRIDGE) + pci_ha = pvt->pci_ha0; + else { + if (sad_ha) + pci_ha = pvt->pci_ha1; + else + pci_ha = pvt->pci_ha0; + } + for (n_tads = 0; n_tads < MAX_TAD; n_tads++) { + pci_read_config_dword(pci_ha, tad_dram_rule[n_tads], ®); + limit = TAD_LIMIT(reg); + if (limit <= prv) { + sprintf(msg, "Can't discover the memory channel"); + return -EINVAL; + } + if (addr <= limit) + break; + prv = limit; + } + if (n_tads == MAX_TAD) { + sprintf(msg, "Can't discover the memory channel"); + return -EINVAL; + } + + ch_way = TAD_CH(reg) + 1; + sck_way = TAD_SOCK(reg) + 1; + + if (ch_way == 3) + idx = addr >> 6; + else + idx = (addr >> (6 + sck_way + shiftup)) & 0x3; + idx = idx % ch_way; + + /* + * FIXME: Shouldn't we use CHN_IDX_OFFSET() here, when ch_way == 3 ??? + */ + switch (idx) { + case 0: + base_ch = TAD_TGT0(reg); + break; + case 1: + base_ch = TAD_TGT1(reg); + break; + case 2: + base_ch = TAD_TGT2(reg); + break; + case 3: + base_ch = TAD_TGT3(reg); + break; + default: + sprintf(msg, "Can't discover the TAD target"); + return -EINVAL; + } + *channel_mask = 1 << base_ch; + + pci_read_config_dword(pvt->pci_tad[base_ch], + tad_ch_nilv_offset[n_tads], + &tad_offset); + + if (pvt->is_mirrored) { + *channel_mask |= 1 << ((base_ch + 2) % 4); + switch(ch_way) { + case 2: + case 4: + sck_xch = 1 << sck_way * (ch_way >> 1); + break; + default: + sprintf(msg, "Invalid mirror set. Can't decode addr"); + return -EINVAL; + } + } else + sck_xch = (1 << sck_way) * ch_way; + + if (pvt->is_lockstep) + *channel_mask |= 1 << ((base_ch + 1) % 4); + + offset = TAD_OFFSET(tad_offset); + + edac_dbg(0, "TAD#%d: address 0x%016Lx < 0x%016Lx, socket interleave %d, channel interleave %d (offset 0x%08Lx), index %d, base ch: %d, ch mask: 0x%02lx\n", + n_tads, + addr, + limit, + (u32)TAD_SOCK(reg), + ch_way, + offset, + idx, + base_ch, + *channel_mask); + + /* Calculate channel address */ + /* Remove the TAD offset */ + + if (offset > addr) { + sprintf(msg, "Can't calculate ch addr: TAD offset 0x%08Lx is too high for addr 0x%08Lx!", + offset, addr); + return -EINVAL; + } + addr -= offset; + /* Store the low bits [0:6] of the addr */ + ch_addr = addr & 0x7f; + /* Remove socket wayness and remove 6 bits */ + addr >>= 6; + addr = div_u64(addr, sck_xch); +#if 0 + /* Divide by channel way */ + addr = addr / ch_way; +#endif + /* Recover the last 6 bits */ + ch_addr |= addr << 6; + + /* + * Step 3) Decode rank + */ + for (n_rir = 0; n_rir < MAX_RIR_RANGES; n_rir++) { + pci_read_config_dword(pvt->pci_tad[base_ch], + rir_way_limit[n_rir], + ®); + + if (!IS_RIR_VALID(reg)) + continue; + + limit = pvt->info.rir_limit(reg); + gb = div_u64_rem(limit >> 20, 1024, &mb); + edac_dbg(0, "RIR#%d, limit: %u.%03u GB (0x%016Lx), way: %d\n", + n_rir, + gb, (mb*1000)/1024, + limit, + 1 << RIR_WAY(reg)); + if (ch_addr <= limit) + break; + } + if (n_rir == MAX_RIR_RANGES) { + sprintf(msg, "Can't discover the memory rank for ch addr 0x%08Lx", + ch_addr); + return -EINVAL; + } + rir_way = RIR_WAY(reg); + + if (pvt->is_close_pg) + idx = (ch_addr >> 6); + else + idx = (ch_addr >> 13); /* FIXME: Datasheet says to shift by 15 */ + idx %= 1 << rir_way; + + pci_read_config_dword(pvt->pci_tad[base_ch], + rir_offset[n_rir][idx], + ®); + *rank = RIR_RNK_TGT(reg); + + edac_dbg(0, "RIR#%d: channel address 0x%08Lx < 0x%08Lx, RIR interleave %d, index %d\n", + n_rir, + ch_addr, + limit, + rir_way, + idx); + + return 0; +} + +/**************************************************************************** + Device initialization routines: put/get, init/exit + ****************************************************************************/ + +/* + * sbridge_put_all_devices 'put' all the devices that we have + * reserved via 'get' + */ +static void sbridge_put_devices(struct sbridge_dev *sbridge_dev) +{ + int i; + + edac_dbg(0, "\n"); + for (i = 0; i < sbridge_dev->n_devs; i++) { + struct pci_dev *pdev = sbridge_dev->pdev[i]; + if (!pdev) + continue; + edac_dbg(0, "Removing dev %02x:%02x.%d\n", + pdev->bus->number, + PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); + pci_dev_put(pdev); + } +} + +static void sbridge_put_all_devices(void) +{ + struct sbridge_dev *sbridge_dev, *tmp; + + list_for_each_entry_safe(sbridge_dev, tmp, &sbridge_edac_list, list) { + sbridge_put_devices(sbridge_dev); + free_sbridge_dev(sbridge_dev); + } +} + +static int sbridge_get_onedevice(struct pci_dev **prev, + u8 *num_mc, + const struct pci_id_table *table, + const unsigned devno) +{ + struct sbridge_dev *sbridge_dev; + const struct pci_id_descr *dev_descr = &table->descr[devno]; + struct pci_dev *pdev = NULL; + u8 bus = 0; + + sbridge_printk(KERN_DEBUG, + "Seeking for: PCI ID %04x:%04x\n", + PCI_VENDOR_ID_INTEL, dev_descr->dev_id); + + pdev = pci_get_device(PCI_VENDOR_ID_INTEL, + dev_descr->dev_id, *prev); + + if (!pdev) { + if (*prev) { + *prev = pdev; + return 0; + } + + if (dev_descr->optional) + return 0; + + /* if the HA wasn't found */ + if (devno == 0) + return -ENODEV; + + sbridge_printk(KERN_INFO, + "Device not found: %04x:%04x\n", + PCI_VENDOR_ID_INTEL, dev_descr->dev_id); + + /* End of list, leave */ + return -ENODEV; + } + bus = pdev->bus->number; + + sbridge_dev = get_sbridge_dev(bus); + if (!sbridge_dev) { + sbridge_dev = alloc_sbridge_dev(bus, table); + if (!sbridge_dev) { + pci_dev_put(pdev); + return -ENOMEM; + } + (*num_mc)++; + } + + if (sbridge_dev->pdev[devno]) { + sbridge_printk(KERN_ERR, + "Duplicated device for %04x:%04x\n", + PCI_VENDOR_ID_INTEL, dev_descr->dev_id); + pci_dev_put(pdev); + return -ENODEV; + } + + sbridge_dev->pdev[devno] = pdev; + + /* Be sure that the device is enabled */ + if (unlikely(pci_enable_device(pdev) < 0)) { + sbridge_printk(KERN_ERR, + "Couldn't enable %04x:%04x\n", + PCI_VENDOR_ID_INTEL, dev_descr->dev_id); + return -ENODEV; + } + + edac_dbg(0, "Detected %04x:%04x\n", + PCI_VENDOR_ID_INTEL, dev_descr->dev_id); + + /* + * As stated on drivers/pci/search.c, the reference count for + * @from is always decremented if it is not %NULL. So, as we need + * to get all devices up to null, we need to do a get for the device + */ + pci_dev_get(pdev); + + *prev = pdev; + + return 0; +} + +/* + * sbridge_get_all_devices - Find and perform 'get' operation on the MCH's + * devices we want to reference for this driver. + * @num_mc: pointer to the memory controllers count, to be incremented in case + * of success. + * @table: model specific table + * + * returns 0 in case of success or error code + */ +static int sbridge_get_all_devices(u8 *num_mc, + const struct pci_id_table *table) +{ + int i, rc; + struct pci_dev *pdev = NULL; + + while (table && table->descr) { + for (i = 0; i < table->n_devs; i++) { + pdev = NULL; + do { + rc = sbridge_get_onedevice(&pdev, num_mc, + table, i); + if (rc < 0) { + if (i == 0) { + i = table->n_devs; + break; + } + sbridge_put_all_devices(); + return -ENODEV; + } + } while (pdev); + } + table++; + } + + return 0; +} + +static int sbridge_mci_bind_devs(struct mem_ctl_info *mci, + struct sbridge_dev *sbridge_dev) +{ + struct sbridge_pvt *pvt = mci->pvt_info; + struct pci_dev *pdev; + int i; + + for (i = 0; i < sbridge_dev->n_devs; i++) { + pdev = sbridge_dev->pdev[i]; + if (!pdev) + continue; + + switch (pdev->device) { + case PCI_DEVICE_ID_INTEL_SBRIDGE_SAD0: + pvt->pci_sad0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_SBRIDGE_SAD1: + pvt->pci_sad1 = pdev; + break; + case PCI_DEVICE_ID_INTEL_SBRIDGE_BR: + pvt->pci_br0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0: + pvt->pci_ha0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA: + pvt->pci_ta = pdev; + break; + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_RAS: + pvt->pci_ras = pdev; + break; + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0: + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD1: + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD2: + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD3: + { + int id = pdev->device - PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0; + pvt->pci_tad[id] = pdev; + } + break; + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_DDRIO: + pvt->pci_ddrio = pdev; + break; + default: + goto error; + } + + edac_dbg(0, "Associated PCI %02x:%02x, bus %d with dev = %p\n", + pdev->vendor, pdev->device, + sbridge_dev->bus, + pdev); + } + + /* Check if everything were registered */ + if (!pvt->pci_sad0 || !pvt->pci_sad1 || !pvt->pci_ha0 || + !pvt-> pci_tad || !pvt->pci_ras || !pvt->pci_ta) + goto enodev; + + for (i = 0; i < NUM_CHANNELS; i++) { + if (!pvt->pci_tad[i]) + goto enodev; + } + return 0; + +enodev: + sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); + return -ENODEV; + +error: + sbridge_printk(KERN_ERR, "Unexpected device %02x:%02x\n", + PCI_VENDOR_ID_INTEL, pdev->device); + return -EINVAL; +} + +static int ibridge_mci_bind_devs(struct mem_ctl_info *mci, + struct sbridge_dev *sbridge_dev) +{ + struct sbridge_pvt *pvt = mci->pvt_info; + struct pci_dev *pdev, *tmp; + int i; + bool mode_2ha = false; + + tmp = pci_get_device(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1, NULL); + if (tmp) { + mode_2ha = true; + pci_dev_put(tmp); + } + + for (i = 0; i < sbridge_dev->n_devs; i++) { + pdev = sbridge_dev->pdev[i]; + if (!pdev) + continue; + + switch (pdev->device) { + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0: + pvt->pci_ha0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA: + pvt->pci_ta = pdev; + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_RAS: + pvt->pci_ras = pdev; + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD2: + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD3: + /* if we have 2 HAs active, channels 2 and 3 + * are in other device */ + if (mode_2ha) + break; + /* fall through */ + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD0: + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD1: + { + int id = pdev->device - PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TAD0; + pvt->pci_tad[id] = pdev; + } + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_2HA_DDRIO0: + pvt->pci_ddrio = pdev; + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_1HA_DDRIO0: + if (!mode_2ha) + pvt->pci_ddrio = pdev; + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_SAD: + pvt->pci_sad0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_BR0: + pvt->pci_br0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_BR1: + pvt->pci_br1 = pdev; + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1: + pvt->pci_ha1 = pdev; + break; + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD0: + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD1: + { + int id = pdev->device - PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA1_TAD0 + 2; + + /* we shouldn't have this device if we have just one + * HA present */ + WARN_ON(!mode_2ha); + pvt->pci_tad[id] = pdev; + } + break; + default: + goto error; + } + + edac_dbg(0, "Associated PCI %02x.%02d.%d with dev = %p\n", + sbridge_dev->bus, + PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), + pdev); + } + + /* Check if everything were registered */ + if (!pvt->pci_sad0 || !pvt->pci_ha0 || !pvt->pci_br0 || + !pvt->pci_br1 || !pvt->pci_tad || !pvt->pci_ras || + !pvt->pci_ta) + goto enodev; + + for (i = 0; i < NUM_CHANNELS; i++) { + if (!pvt->pci_tad[i]) + goto enodev; + } + return 0; + +enodev: + sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); + return -ENODEV; + +error: + sbridge_printk(KERN_ERR, + "Unexpected device %02x:%02x\n", PCI_VENDOR_ID_INTEL, + pdev->device); + return -EINVAL; +} + +static int haswell_mci_bind_devs(struct mem_ctl_info *mci, + struct sbridge_dev *sbridge_dev) +{ + struct sbridge_pvt *pvt = mci->pvt_info; + struct pci_dev *pdev, *tmp; + int i; + bool mode_2ha = false; + + tmp = pci_get_device(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1, NULL); + if (tmp) { + mode_2ha = true; + pci_dev_put(tmp); + } + + /* there's only one device per system; not tied to any bus */ + if (pvt->info.pci_vtd == NULL) + /* result will be checked later */ + pvt->info.pci_vtd = pci_get_device(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_HASWELL_IMC_VTD_MISC, + NULL); + + for (i = 0; i < sbridge_dev->n_devs; i++) { + pdev = sbridge_dev->pdev[i]; + if (!pdev) + continue; + + switch (pdev->device) { + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD0: + pvt->pci_sad0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_CBO_SAD1: + pvt->pci_sad1 = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0: + pvt->pci_ha0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TA: + pvt->pci_ta = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_THERMAL: + pvt->pci_ras = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD0: + pvt->pci_tad[0] = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD1: + pvt->pci_tad[1] = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD2: + if (!mode_2ha) + pvt->pci_tad[2] = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0_TAD3: + if (!mode_2ha) + pvt->pci_tad[3] = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_DDRIO0: + pvt->pci_ddrio = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1: + pvt->pci_ha1 = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TA: + pvt->pci_ha1_ta = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD0: + if (mode_2ha) + pvt->pci_tad[2] = pdev; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA1_TAD1: + if (mode_2ha) + pvt->pci_tad[3] = pdev; + break; + default: + break; + } + + edac_dbg(0, "Associated PCI %02x.%02d.%d with dev = %p\n", + sbridge_dev->bus, + PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), + pdev); + } + + /* Check if everything were registered */ + if (!pvt->pci_sad0 || !pvt->pci_ha0 || !pvt->pci_sad1 || + !pvt->pci_ras || !pvt->pci_ta || !pvt->info.pci_vtd) + goto enodev; + + for (i = 0; i < NUM_CHANNELS; i++) { + if (!pvt->pci_tad[i]) + goto enodev; + } + return 0; + +enodev: + sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); + return -ENODEV; +} + +static int broadwell_mci_bind_devs(struct mem_ctl_info *mci, + struct sbridge_dev *sbridge_dev) +{ + struct sbridge_pvt *pvt = mci->pvt_info; + struct pci_dev *pdev; + int i; + + /* there's only one device per system; not tied to any bus */ + if (pvt->info.pci_vtd == NULL) + /* result will be checked later */ + pvt->info.pci_vtd = pci_get_device(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_BROADWELL_IMC_VTD_MISC, + NULL); + + for (i = 0; i < sbridge_dev->n_devs; i++) { + pdev = sbridge_dev->pdev[i]; + if (!pdev) + continue; + + switch (pdev->device) { + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD0: + pvt->pci_sad0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_CBO_SAD1: + pvt->pci_sad1 = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0: + pvt->pci_ha0 = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TA: + pvt->pci_ta = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_THERMAL: + pvt->pci_ras = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD0: + pvt->pci_tad[0] = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD1: + pvt->pci_tad[1] = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD2: + pvt->pci_tad[2] = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0_TAD3: + pvt->pci_tad[3] = pdev; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_DDRIO0: + pvt->pci_ddrio = pdev; + break; + default: + break; + } + + edac_dbg(0, "Associated PCI %02x.%02d.%d with dev = %p\n", + sbridge_dev->bus, + PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), + pdev); + } + + /* Check if everything were registered */ + if (!pvt->pci_sad0 || !pvt->pci_ha0 || !pvt->pci_sad1 || + !pvt->pci_ras || !pvt->pci_ta || !pvt->info.pci_vtd) + goto enodev; + + for (i = 0; i < NUM_CHANNELS; i++) { + if (!pvt->pci_tad[i]) + goto enodev; + } + return 0; + +enodev: + sbridge_printk(KERN_ERR, "Some needed devices are missing\n"); + return -ENODEV; +} + +/**************************************************************************** + Error check routines + ****************************************************************************/ + +/* + * While Sandy Bridge has error count registers, SMI BIOS read values from + * and resets the counters. So, they are not reliable for the OS to read + * from them. So, we have no option but to just trust on whatever MCE is + * telling us about the errors. + */ +static void sbridge_mce_output_error(struct mem_ctl_info *mci, + const struct mce *m) +{ + struct mem_ctl_info *new_mci; + struct sbridge_pvt *pvt = mci->pvt_info; + enum hw_event_mc_err_type tp_event; + char *type, *optype, msg[256]; + bool ripv = GET_BITFIELD(m->mcgstatus, 0, 0); + bool overflow = GET_BITFIELD(m->status, 62, 62); + bool uncorrected_error = GET_BITFIELD(m->status, 61, 61); + bool recoverable; + u32 core_err_cnt = GET_BITFIELD(m->status, 38, 52); + u32 mscod = GET_BITFIELD(m->status, 16, 31); + u32 errcode = GET_BITFIELD(m->status, 0, 15); + u32 channel = GET_BITFIELD(m->status, 0, 3); + u32 optypenum = GET_BITFIELD(m->status, 4, 6); + long channel_mask, first_channel; + u8 rank, socket; + int rc, dimm; + char *area_type = NULL; + + if (pvt->info.type == IVY_BRIDGE) + recoverable = true; + else + recoverable = GET_BITFIELD(m->status, 56, 56); + + if (uncorrected_error) { + if (ripv) { + type = "FATAL"; + tp_event = HW_EVENT_ERR_FATAL; + } else { + type = "NON_FATAL"; + tp_event = HW_EVENT_ERR_UNCORRECTED; + } + } else { + type = "CORRECTED"; + tp_event = HW_EVENT_ERR_CORRECTED; + } + + /* + * According with Table 15-9 of the Intel Architecture spec vol 3A, + * memory errors should fit in this mask: + * 000f 0000 1mmm cccc (binary) + * where: + * f = Correction Report Filtering Bit. If 1, subsequent errors + * won't be shown + * mmm = error type + * cccc = channel + * If the mask doesn't match, report an error to the parsing logic + */ + if (! ((errcode & 0xef80) == 0x80)) { + optype = "Can't parse: it is not a mem"; + } else { + switch (optypenum) { + case 0: + optype = "generic undef request error"; + break; + case 1: + optype = "memory read error"; + break; + case 2: + optype = "memory write error"; + break; + case 3: + optype = "addr/cmd error"; + break; + case 4: + optype = "memory scrubbing error"; + break; + default: + optype = "reserved"; + break; + } + } + + /* Only decode errors with an valid address (ADDRV) */ + if (!GET_BITFIELD(m->status, 58, 58)) + return; + + rc = get_memory_error_data(mci, m->addr, &socket, + &channel_mask, &rank, &area_type, msg); + if (rc < 0) + goto err_parsing; + new_mci = get_mci_for_node_id(socket); + if (!new_mci) { + strcpy(msg, "Error: socket got corrupted!"); + goto err_parsing; + } + mci = new_mci; + pvt = mci->pvt_info; + + first_channel = find_first_bit(&channel_mask, NUM_CHANNELS); + + if (rank < 4) + dimm = 0; + else if (rank < 8) + dimm = 1; + else + dimm = 2; + + + /* + * FIXME: On some memory configurations (mirror, lockstep), the + * Memory Controller can't point the error to a single DIMM. The + * EDAC core should be handling the channel mask, in order to point + * to the group of dimm's where the error may be happening. + */ + if (!pvt->is_lockstep && !pvt->is_mirrored && !pvt->is_close_pg) + channel = first_channel; + + snprintf(msg, sizeof(msg), + "%s%s area:%s err_code:%04x:%04x socket:%d channel_mask:%ld rank:%d", + overflow ? " OVERFLOW" : "", + (uncorrected_error && recoverable) ? " recoverable" : "", + area_type, + mscod, errcode, + socket, + channel_mask, + rank); + + edac_dbg(0, "%s\n", msg); + + /* FIXME: need support for channel mask */ + + if (channel == CHANNEL_UNSPECIFIED) + channel = -1; + + /* Call the helper to output message */ + edac_mc_handle_error(tp_event, mci, core_err_cnt, + m->addr >> PAGE_SHIFT, m->addr & ~PAGE_MASK, 0, + channel, dimm, -1, + optype, msg); + return; +err_parsing: + edac_mc_handle_error(tp_event, mci, core_err_cnt, 0, 0, 0, + -1, -1, -1, + msg, ""); + +} + +/* + * sbridge_check_error Retrieve and process errors reported by the + * hardware. Called by the Core module. + */ +static void sbridge_check_error(struct mem_ctl_info *mci) +{ + struct sbridge_pvt *pvt = mci->pvt_info; + int i; + unsigned count = 0; + struct mce *m; + + /* + * MCE first step: Copy all mce errors into a temporary buffer + * We use a double buffering here, to reduce the risk of + * loosing an error. + */ + smp_rmb(); + count = (pvt->mce_out + MCE_LOG_LEN - pvt->mce_in) + % MCE_LOG_LEN; + if (!count) + return; + + m = pvt->mce_outentry; + if (pvt->mce_in + count > MCE_LOG_LEN) { + unsigned l = MCE_LOG_LEN - pvt->mce_in; + + memcpy(m, &pvt->mce_entry[pvt->mce_in], sizeof(*m) * l); + smp_wmb(); + pvt->mce_in = 0; + count -= l; + m += l; + } + memcpy(m, &pvt->mce_entry[pvt->mce_in], sizeof(*m) * count); + smp_wmb(); + pvt->mce_in += count; + + smp_rmb(); + if (pvt->mce_overrun) { + sbridge_printk(KERN_ERR, "Lost %d memory errors\n", + pvt->mce_overrun); + smp_wmb(); + pvt->mce_overrun = 0; + } + + /* + * MCE second step: parse errors and display + */ + for (i = 0; i < count; i++) + sbridge_mce_output_error(mci, &pvt->mce_outentry[i]); +} + +/* + * sbridge_mce_check_error Replicates mcelog routine to get errors + * This routine simply queues mcelog errors, and + * return. The error itself should be handled later + * by sbridge_check_error. + * WARNING: As this routine should be called at NMI time, extra care should + * be taken to avoid deadlocks, and to be as fast as possible. + */ +static int sbridge_mce_check_error(struct notifier_block *nb, unsigned long val, + void *data) +{ + struct mce *mce = (struct mce *)data; + struct mem_ctl_info *mci; + struct sbridge_pvt *pvt; + char *type; + + if (get_edac_report_status() == EDAC_REPORTING_DISABLED) + return NOTIFY_DONE; + + mci = get_mci_for_node_id(mce->socketid); + if (!mci) + return NOTIFY_BAD; + pvt = mci->pvt_info; + + /* + * Just let mcelog handle it if the error is + * outside the memory controller. A memory error + * is indicated by bit 7 = 1 and bits = 8-11,13-15 = 0. + * bit 12 has an special meaning. + */ + if ((mce->status & 0xefff) >> 7 != 1) + return NOTIFY_DONE; + + if (mce->mcgstatus & MCG_STATUS_MCIP) + type = "Exception"; + else + type = "Event"; + + sbridge_mc_printk(mci, KERN_DEBUG, "HANDLING MCE MEMORY ERROR\n"); + + sbridge_mc_printk(mci, KERN_DEBUG, "CPU %d: Machine Check %s: %Lx " + "Bank %d: %016Lx\n", mce->extcpu, type, + mce->mcgstatus, mce->bank, mce->status); + sbridge_mc_printk(mci, KERN_DEBUG, "TSC %llx ", mce->tsc); + sbridge_mc_printk(mci, KERN_DEBUG, "ADDR %llx ", mce->addr); + sbridge_mc_printk(mci, KERN_DEBUG, "MISC %llx ", mce->misc); + + sbridge_mc_printk(mci, KERN_DEBUG, "PROCESSOR %u:%x TIME %llu SOCKET " + "%u APIC %x\n", mce->cpuvendor, mce->cpuid, + mce->time, mce->socketid, mce->apicid); + + smp_rmb(); + if ((pvt->mce_out + 1) % MCE_LOG_LEN == pvt->mce_in) { + smp_wmb(); + pvt->mce_overrun++; + return NOTIFY_DONE; + } + + /* Copy memory error at the ringbuffer */ + memcpy(&pvt->mce_entry[pvt->mce_out], mce, sizeof(*mce)); + smp_wmb(); + pvt->mce_out = (pvt->mce_out + 1) % MCE_LOG_LEN; + + /* Handle fatal errors immediately */ + if (mce->mcgstatus & 1) + sbridge_check_error(mci); + + /* Advice mcelog that the error were handled */ + return NOTIFY_STOP; +} + +static struct notifier_block sbridge_mce_dec = { + .notifier_call = sbridge_mce_check_error, +}; + +/**************************************************************************** + EDAC register/unregister logic + ****************************************************************************/ + +static void sbridge_unregister_mci(struct sbridge_dev *sbridge_dev) +{ + struct mem_ctl_info *mci = sbridge_dev->mci; + struct sbridge_pvt *pvt; + + if (unlikely(!mci || !mci->pvt_info)) { + edac_dbg(0, "MC: dev = %p\n", &sbridge_dev->pdev[0]->dev); + + sbridge_printk(KERN_ERR, "Couldn't find mci handler\n"); + return; + } + + pvt = mci->pvt_info; + + edac_dbg(0, "MC: mci = %p, dev = %p\n", + mci, &sbridge_dev->pdev[0]->dev); + + /* Remove MC sysfs nodes */ + edac_mc_del_mc(mci->pdev); + + edac_dbg(1, "%s: free mci struct\n", mci->ctl_name); + kfree(mci->ctl_name); + edac_mc_free(mci); + sbridge_dev->mci = NULL; +} + +static int sbridge_register_mci(struct sbridge_dev *sbridge_dev, enum type type) +{ + struct mem_ctl_info *mci; + struct edac_mc_layer layers[2]; + struct sbridge_pvt *pvt; + struct pci_dev *pdev = sbridge_dev->pdev[0]; + int rc; + + /* Check the number of active and not disabled channels */ + rc = check_if_ecc_is_active(sbridge_dev->bus, type); + if (unlikely(rc < 0)) + return rc; + + /* allocate a new MC control structure */ + layers[0].type = EDAC_MC_LAYER_CHANNEL; + layers[0].size = NUM_CHANNELS; + layers[0].is_virt_csrow = false; + layers[1].type = EDAC_MC_LAYER_SLOT; + layers[1].size = MAX_DIMMS; + layers[1].is_virt_csrow = true; + mci = edac_mc_alloc(sbridge_dev->mc, ARRAY_SIZE(layers), layers, + sizeof(*pvt)); + + if (unlikely(!mci)) + return -ENOMEM; + + edac_dbg(0, "MC: mci = %p, dev = %p\n", + mci, &pdev->dev); + + pvt = mci->pvt_info; + memset(pvt, 0, sizeof(*pvt)); + + /* Associate sbridge_dev and mci for future usage */ + pvt->sbridge_dev = sbridge_dev; + sbridge_dev->mci = mci; + + mci->mtype_cap = MEM_FLAG_DDR3; + mci->edac_ctl_cap = EDAC_FLAG_NONE; + mci->edac_cap = EDAC_FLAG_NONE; + mci->mod_name = "sbridge_edac.c"; + mci->mod_ver = SBRIDGE_REVISION; + mci->dev_name = pci_name(pdev); + mci->ctl_page_to_phys = NULL; + + /* Set the function pointer to an actual operation function */ + mci->edac_check = sbridge_check_error; + + pvt->info.type = type; + switch (type) { + case IVY_BRIDGE: + pvt->info.rankcfgr = IB_RANK_CFG_A; + pvt->info.get_tolm = ibridge_get_tolm; + pvt->info.get_tohm = ibridge_get_tohm; + pvt->info.dram_rule = ibridge_dram_rule; + pvt->info.get_memory_type = get_memory_type; + pvt->info.get_node_id = get_node_id; + pvt->info.rir_limit = rir_limit; + pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule); + pvt->info.interleave_list = ibridge_interleave_list; + pvt->info.max_interleave = ARRAY_SIZE(ibridge_interleave_list); + pvt->info.interleave_pkg = ibridge_interleave_pkg; + mci->ctl_name = kasprintf(GFP_KERNEL, "Ivy Bridge Socket#%d", mci->mc_idx); + + /* Store pci devices at mci for faster access */ + rc = ibridge_mci_bind_devs(mci, sbridge_dev); + if (unlikely(rc < 0)) + goto fail0; + break; + case SANDY_BRIDGE: + pvt->info.rankcfgr = SB_RANK_CFG_A; + pvt->info.get_tolm = sbridge_get_tolm; + pvt->info.get_tohm = sbridge_get_tohm; + pvt->info.dram_rule = sbridge_dram_rule; + pvt->info.get_memory_type = get_memory_type; + pvt->info.get_node_id = get_node_id; + pvt->info.rir_limit = rir_limit; + pvt->info.max_sad = ARRAY_SIZE(sbridge_dram_rule); + pvt->info.interleave_list = sbridge_interleave_list; + pvt->info.max_interleave = ARRAY_SIZE(sbridge_interleave_list); + pvt->info.interleave_pkg = sbridge_interleave_pkg; + mci->ctl_name = kasprintf(GFP_KERNEL, "Sandy Bridge Socket#%d", mci->mc_idx); + + /* Store pci devices at mci for faster access */ + rc = sbridge_mci_bind_devs(mci, sbridge_dev); + if (unlikely(rc < 0)) + goto fail0; + break; + case HASWELL: + /* rankcfgr isn't used */ + pvt->info.get_tolm = haswell_get_tolm; + pvt->info.get_tohm = haswell_get_tohm; + pvt->info.dram_rule = ibridge_dram_rule; + pvt->info.get_memory_type = haswell_get_memory_type; + pvt->info.get_node_id = haswell_get_node_id; + pvt->info.rir_limit = haswell_rir_limit; + pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule); + pvt->info.interleave_list = ibridge_interleave_list; + pvt->info.max_interleave = ARRAY_SIZE(ibridge_interleave_list); + pvt->info.interleave_pkg = ibridge_interleave_pkg; + mci->ctl_name = kasprintf(GFP_KERNEL, "Haswell Socket#%d", mci->mc_idx); + + /* Store pci devices at mci for faster access */ + rc = haswell_mci_bind_devs(mci, sbridge_dev); + if (unlikely(rc < 0)) + goto fail0; + break; + case BROADWELL: + /* rankcfgr isn't used */ + pvt->info.get_tolm = haswell_get_tolm; + pvt->info.get_tohm = haswell_get_tohm; + pvt->info.dram_rule = ibridge_dram_rule; + pvt->info.get_memory_type = haswell_get_memory_type; + pvt->info.get_node_id = haswell_get_node_id; + pvt->info.rir_limit = haswell_rir_limit; + pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule); + pvt->info.interleave_list = ibridge_interleave_list; + pvt->info.max_interleave = ARRAY_SIZE(ibridge_interleave_list); + pvt->info.interleave_pkg = ibridge_interleave_pkg; + mci->ctl_name = kasprintf(GFP_KERNEL, "Broadwell Socket#%d", mci->mc_idx); + + /* Store pci devices at mci for faster access */ + rc = broadwell_mci_bind_devs(mci, sbridge_dev); + if (unlikely(rc < 0)) + goto fail0; + break; + } + + /* Get dimm basic config and the memory layout */ + get_dimm_config(mci); + get_memory_layout(mci); + + /* record ptr to the generic device */ + mci->pdev = &pdev->dev; + + /* add this new MC control structure to EDAC's list of MCs */ + if (unlikely(edac_mc_add_mc(mci))) { + edac_dbg(0, "MC: failed edac_mc_add_mc()\n"); + rc = -EINVAL; + goto fail0; + } + + return 0; + +fail0: + kfree(mci->ctl_name); + edac_mc_free(mci); + sbridge_dev->mci = NULL; + return rc; +} + +/* + * sbridge_probe Probe for ONE instance of device to see if it is + * present. + * return: + * 0 for FOUND a device + * < 0 for error code + */ + +static int sbridge_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + int rc = -ENODEV; + u8 mc, num_mc = 0; + struct sbridge_dev *sbridge_dev; + enum type type = SANDY_BRIDGE; + + /* get the pci devices we want to reserve for our use */ + mutex_lock(&sbridge_edac_lock); + + /* + * All memory controllers are allocated at the first pass. + */ + if (unlikely(probed >= 1)) { + mutex_unlock(&sbridge_edac_lock); + return -ENODEV; + } + probed++; + + switch (pdev->device) { + case PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA: + rc = sbridge_get_all_devices(&num_mc, pci_dev_descr_ibridge_table); + type = IVY_BRIDGE; + break; + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0: + rc = sbridge_get_all_devices(&num_mc, pci_dev_descr_sbridge_table); + type = SANDY_BRIDGE; + break; + case PCI_DEVICE_ID_INTEL_HASWELL_IMC_HA0: + rc = sbridge_get_all_devices(&num_mc, pci_dev_descr_haswell_table); + type = HASWELL; + break; + case PCI_DEVICE_ID_INTEL_BROADWELL_IMC_HA0: + rc = sbridge_get_all_devices(&num_mc, pci_dev_descr_broadwell_table); + type = BROADWELL; + break; + } + if (unlikely(rc < 0)) { + edac_dbg(0, "couldn't get all devices for 0x%x\n", pdev->device); + goto fail0; + } + + mc = 0; + + list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) { + edac_dbg(0, "Registering MC#%d (%d of %d)\n", + mc, mc + 1, num_mc); + + sbridge_dev->mc = mc++; + rc = sbridge_register_mci(sbridge_dev, type); + if (unlikely(rc < 0)) + goto fail1; + } + + sbridge_printk(KERN_INFO, "%s\n", SBRIDGE_REVISION); + + mutex_unlock(&sbridge_edac_lock); + return 0; + +fail1: + list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) + sbridge_unregister_mci(sbridge_dev); + + sbridge_put_all_devices(); +fail0: + mutex_unlock(&sbridge_edac_lock); + return rc; +} + +/* + * sbridge_remove destructor for one instance of device + * + */ +static void sbridge_remove(struct pci_dev *pdev) +{ + struct sbridge_dev *sbridge_dev; + + edac_dbg(0, "\n"); + + /* + * we have a trouble here: pdev value for removal will be wrong, since + * it will point to the X58 register used to detect that the machine + * is a Nehalem or upper design. However, due to the way several PCI + * devices are grouped together to provide MC functionality, we need + * to use a different method for releasing the devices + */ + + mutex_lock(&sbridge_edac_lock); + + if (unlikely(!probed)) { + mutex_unlock(&sbridge_edac_lock); + return; + } + + list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) + sbridge_unregister_mci(sbridge_dev); + + /* Release PCI resources */ + sbridge_put_all_devices(); + + probed--; + + mutex_unlock(&sbridge_edac_lock); +} + +MODULE_DEVICE_TABLE(pci, sbridge_pci_tbl); + +/* + * sbridge_driver pci_driver structure for this module + * + */ +static struct pci_driver sbridge_driver = { + .name = "sbridge_edac", + .probe = sbridge_probe, + .remove = sbridge_remove, + .id_table = sbridge_pci_tbl, +}; + +/* + * sbridge_init Module entry function + * Try to initialize this module for its devices + */ +static int __init sbridge_init(void) +{ + int pci_rc; + + edac_dbg(2, "\n"); + + /* Ensure that the OPSTATE is set correctly for POLL or NMI */ + opstate_init(); + + pci_rc = pci_register_driver(&sbridge_driver); + if (pci_rc >= 0) { + mce_register_decode_chain(&sbridge_mce_dec); + if (get_edac_report_status() == EDAC_REPORTING_DISABLED) + sbridge_printk(KERN_WARNING, "Loading driver, error reporting disabled.\n"); + return 0; + } + + sbridge_printk(KERN_ERR, "Failed to register device with error %d.\n", + pci_rc); + + return pci_rc; +} + +/* + * sbridge_exit() Module exit function + * Unregister the driver + */ +static void __exit sbridge_exit(void) +{ + edac_dbg(2, "\n"); + pci_unregister_driver(&sbridge_driver); + mce_unregister_decode_chain(&sbridge_mce_dec); +} + +module_init(sbridge_init); +module_exit(sbridge_exit); + +module_param(edac_op_state, int, 0444); +MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI"); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Mauro Carvalho Chehab"); +MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)"); +MODULE_DESCRIPTION("MC Driver for Intel Sandy Bridge and Ivy Bridge memory controllers - " + SBRIDGE_REVISION); |