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linux-2.6/drivers/edac/amd64_edac.h
Borislav Petkov d95cf4de6a amd64_edac: Simplify ECC override handling 
No need for clearing ecc_enable_override and checking it in two places.
Instead, simply check it during probing and act accordingly. Also,
rename the flag bitfields according to the functionality they actually
represent. What is more, make sure original BIOS ECC settings are
restored when the module is unloaded.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-03-01 19:25:12 +01:00

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/*
* AMD64 class Memory Controller kernel module
*
* Copyright (c) 2009 SoftwareBitMaker.
* Copyright (c) 2009 Advanced Micro Devices, Inc.
*
* This file may be distributed under the terms of the
* GNU General Public License.
*
* Originally Written by Thayne Harbaugh
*
* Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
* - K8 CPU Revision D and greater support
*
* Changes by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>:
* - Module largely rewritten, with new (and hopefully correct)
* code for dealing with node and chip select interleaving,
* various code cleanup, and bug fixes
* - Added support for memory hoisting using DRAM hole address
* register
*
* Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
* -K8 Rev (1207) revision support added, required Revision
* specific mini-driver code to support Rev F as well as
* prior revisions
*
* Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
* -Family 10h revision support added. New PCI Device IDs,
* indicating new changes. Actual registers modified
* were slight, less than the Rev E to Rev F transition
* but changing the PCI Device ID was the proper thing to
* do, as it provides for almost automactic family
* detection. The mods to Rev F required more family
* information detection.
*
* Changes/Fixes by Borislav Petkov <borislav.petkov@amd.com>:
* - misc fixes and code cleanups
*
* This module is based on the following documents
* (available from http://www.amd.com/):
*
* Title: BIOS and Kernel Developer's Guide for AMD Athlon 64 and AMD
* Opteron Processors
* AMD publication #: 26094
*` Revision: 3.26
*
* Title: BIOS and Kernel Developer's Guide for AMD NPT Family 0Fh
* Processors
* AMD publication #: 32559
* Revision: 3.00
* Issue Date: May 2006
*
* Title: BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h
* Processors
* AMD publication #: 31116
* Revision: 3.00
* Issue Date: September 07, 2007
*
* Sections in the first 2 documents are no longer in sync with each other.
* The Family 10h BKDG was totally re-written from scratch with a new
* presentation model.
* Therefore, comments that refer to a Document section might be off.
*/
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/slab.h>
#include <linux/mmzone.h>
#include <linux/edac.h>
#include <asm/msr.h>
#include "edac_core.h"
#include "edac_mce_amd.h"
#define amd64_printk(level, fmt, arg...) \
edac_printk(level, "amd64", fmt, ##arg)
#define amd64_mc_printk(mci, level, fmt, arg...) \
edac_mc_chipset_printk(mci, level, "amd64", fmt, ##arg)
/*
* Throughout the comments in this code, the following terms are used:
*
* SysAddr, DramAddr, and InputAddr
*
* These terms come directly from the amd64 documentation
* (AMD publication #26094). They are defined as follows:
*
* SysAddr:
* This is a physical address generated by a CPU core or a device
* doing DMA. If generated by a CPU core, a SysAddr is the result of
* a virtual to physical address translation by the CPU core's address
* translation mechanism (MMU).
*
* DramAddr:
* A DramAddr is derived from a SysAddr by subtracting an offset that
* depends on which node the SysAddr maps to and whether the SysAddr
* is within a range affected by memory hoisting. The DRAM Base
* (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers
* determine which node a SysAddr maps to.
*
* If the DRAM Hole Address Register (DHAR) is enabled and the SysAddr
* is within the range of addresses specified by this register, then
* a value x from the DHAR is subtracted from the SysAddr to produce a
* DramAddr. Here, x represents the base address for the node that
* the SysAddr maps to plus an offset due to memory hoisting. See
* section 3.4.8 and the comments in amd64_get_dram_hole_info() and
* sys_addr_to_dram_addr() below for more information.
*
* If the SysAddr is not affected by the DHAR then a value y is
* subtracted from the SysAddr to produce a DramAddr. Here, y is the
* base address for the node that the SysAddr maps to. See section
* 3.4.4 and the comments in sys_addr_to_dram_addr() below for more
* information.
*
* InputAddr:
* A DramAddr is translated to an InputAddr before being passed to the
* memory controller for the node that the DramAddr is associated
* with. The memory controller then maps the InputAddr to a csrow.
* If node interleaving is not in use, then the InputAddr has the same
* value as the DramAddr. Otherwise, the InputAddr is produced by
* discarding the bits used for node interleaving from the DramAddr.
* See section 3.4.4 for more information.
*
* The memory controller for a given node uses its DRAM CS Base and
* DRAM CS Mask registers to map an InputAddr to a csrow. See
* sections 3.5.4 and 3.5.5 for more information.
*/
#define EDAC_AMD64_VERSION " Ver: 3.3.0 " __DATE__
#define EDAC_MOD_STR "amd64_edac"
#define EDAC_MAX_NUMNODES 8
/* Extended Model from CPUID, for CPU Revision numbers */
#define K8_REV_D 1
#define K8_REV_E 2
#define K8_REV_F 4
/* Hardware limit on ChipSelect rows per MC and processors per system */
#define MAX_CS_COUNT 8
#define DRAM_REG_COUNT 8
#define ON true
#define OFF false
/*
* PCI-defined configuration space registers
*/
/*
* Function 1 - Address Map
*/
#define K8_DRAM_BASE_LOW 0x40
#define K8_DRAM_LIMIT_LOW 0x44
#define K8_DHAR 0xf0
#define DHAR_VALID BIT(0)
#define F10_DRAM_MEM_HOIST_VALID BIT(1)
#define DHAR_BASE_MASK 0xff000000
#define dhar_base(dhar) (dhar & DHAR_BASE_MASK)
#define K8_DHAR_OFFSET_MASK 0x0000ff00
#define k8_dhar_offset(dhar) ((dhar & K8_DHAR_OFFSET_MASK) << 16)
#define F10_DHAR_OFFSET_MASK 0x0000ff80
/* NOTE: Extra mask bit vs K8 */
#define f10_dhar_offset(dhar) ((dhar & F10_DHAR_OFFSET_MASK) << 16)
/* F10 High BASE/LIMIT registers */
#define F10_DRAM_BASE_HIGH 0x140
#define F10_DRAM_LIMIT_HIGH 0x144
/*
* Function 2 - DRAM controller
*/
#define K8_DCSB0 0x40
#define F10_DCSB1 0x140
#define K8_DCSB_CS_ENABLE BIT(0)
#define K8_DCSB_NPT_SPARE BIT(1)
#define K8_DCSB_NPT_TESTFAIL BIT(2)
/*
* REV E: select [31:21] and [15:9] from DCSB and the shift amount to form
* the address
*/
#define REV_E_DCSB_BASE_BITS (0xFFE0FE00ULL)
#define REV_E_DCS_SHIFT 4
#define REV_F_F1Xh_DCSB_BASE_BITS (0x1FF83FE0ULL)
#define REV_F_F1Xh_DCS_SHIFT 8
/*
* REV F and later: selects [28:19] and [13:5] from DCSB and the shift amount
* to form the address
*/
#define REV_F_DCSB_BASE_BITS (0x1FF83FE0ULL)
#define REV_F_DCS_SHIFT 8
/* DRAM CS Mask Registers */
#define K8_DCSM0 0x60
#define F10_DCSM1 0x160
/* REV E: select [29:21] and [15:9] from DCSM */
#define REV_E_DCSM_MASK_BITS 0x3FE0FE00
/* unused bits [24:20] and [12:0] */
#define REV_E_DCS_NOTUSED_BITS 0x01F01FFF
/* REV F and later: select [28:19] and [13:5] from DCSM */
#define REV_F_F1Xh_DCSM_MASK_BITS 0x1FF83FE0
/* unused bits [26:22] and [12:0] */
#define REV_F_F1Xh_DCS_NOTUSED_BITS 0x07C01FFF
#define DBAM0 0x80
#define DBAM1 0x180
/* Extract the DIMM 'type' on the i'th DIMM from the DBAM reg value passed */
#define DBAM_DIMM(i, reg) ((((reg) >> (4*i))) & 0xF)
#define DBAM_MAX_VALUE 11
#define F10_DCLR_0 0x90
#define F10_DCLR_1 0x190
#define REVE_WIDTH_128 BIT(16)
#define F10_WIDTH_128 BIT(11)
#define F10_DCHR_0 0x94
#define F10_DCHR_1 0x194
#define F10_DCHR_FOUR_RANK_DIMM BIT(18)
#define DDR3_MODE BIT(8)
#define F10_DCHR_MblMode BIT(6)
#define F10_DCTL_SEL_LOW 0x110
#define dct_sel_baseaddr(pvt) \
((pvt->dram_ctl_select_low) & 0xFFFFF800)
#define dct_sel_interleave_addr(pvt) \
(((pvt->dram_ctl_select_low) >> 6) & 0x3)
enum {
F10_DCTL_SEL_LOW_DctSelHiRngEn = BIT(0),
F10_DCTL_SEL_LOW_DctSelIntLvEn = BIT(2),
F10_DCTL_SEL_LOW_DctGangEn = BIT(4),
F10_DCTL_SEL_LOW_DctDatIntLv = BIT(5),
F10_DCTL_SEL_LOW_DramEnable = BIT(8),
F10_DCTL_SEL_LOW_MemCleared = BIT(10),
};
#define dct_high_range_enabled(pvt) \
(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctSelHiRngEn)
#define dct_interleave_enabled(pvt) \
(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctSelIntLvEn)
#define dct_ganging_enabled(pvt) \
(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctGangEn)
#define dct_data_intlv_enabled(pvt) \
(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DctDatIntLv)
#define dct_dram_enabled(pvt) \
(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_DramEnable)
#define dct_memory_cleared(pvt) \
(pvt->dram_ctl_select_low & F10_DCTL_SEL_LOW_MemCleared)
#define F10_DCTL_SEL_HIGH 0x114
/*
* Function 3 - Misc Control
*/
#define K8_NBCTL 0x40
/* Correctable ECC error reporting enable */
#define K8_NBCTL_CECCEn BIT(0)
/* UnCorrectable ECC error reporting enable */
#define K8_NBCTL_UECCEn BIT(1)
#define K8_NBCFG 0x44
#define K8_NBCFG_CHIPKILL BIT(23)
#define K8_NBCFG_ECC_ENABLE BIT(22)
#define K8_NBSL 0x48
/* Family F10h: Normalized Extended Error Codes */
#define F10_NBSL_EXT_ERR_RES 0x0
#define F10_NBSL_EXT_ERR_ECC 0x8
/* Next two are overloaded values */
#define F10_NBSL_EXT_ERR_LINK_PROTO 0xB
#define F10_NBSL_EXT_ERR_L3_PROTO 0xB
#define F10_NBSL_EXT_ERR_NB_ARRAY 0xC
#define F10_NBSL_EXT_ERR_DRAM_PARITY 0xD
#define F10_NBSL_EXT_ERR_LINK_RETRY 0xE
/* Next two are overloaded values */
#define F10_NBSL_EXT_ERR_GART_WALK 0xF
#define F10_NBSL_EXT_ERR_DEV_WALK 0xF
/* 0x10 to 0x1B: Reserved */
#define F10_NBSL_EXT_ERR_L3_DATA 0x1C
#define F10_NBSL_EXT_ERR_L3_TAG 0x1D
#define F10_NBSL_EXT_ERR_L3_LRU 0x1E
/* K8: Normalized Extended Error Codes */
#define K8_NBSL_EXT_ERR_ECC 0x0
#define K8_NBSL_EXT_ERR_CRC 0x1
#define K8_NBSL_EXT_ERR_SYNC 0x2
#define K8_NBSL_EXT_ERR_MST 0x3
#define K8_NBSL_EXT_ERR_TGT 0x4
#define K8_NBSL_EXT_ERR_GART 0x5
#define K8_NBSL_EXT_ERR_RMW 0x6
#define K8_NBSL_EXT_ERR_WDT 0x7
#define K8_NBSL_EXT_ERR_CHIPKILL_ECC 0x8
#define K8_NBSL_EXT_ERR_DRAM_PARITY 0xD
/*
* The following are for BUS type errors AFTER values have been normalized by
* shifting right
*/
#define K8_NBSL_PP_SRC 0x0
#define K8_NBSL_PP_RES 0x1
#define K8_NBSL_PP_OBS 0x2
#define K8_NBSL_PP_GENERIC 0x3
#define EXTRACT_ERR_CPU_MAP(x) ((x) & 0xF)
#define K8_NBEAL 0x50
#define K8_NBEAH 0x54
#define K8_SCRCTRL 0x58
#define F10_NB_CFG_LOW 0x88
#define F10_NB_CFG_LOW_ENABLE_EXT_CFG BIT(14)
#define F10_NB_CFG_HIGH 0x8C
#define F10_ONLINE_SPARE 0xB0
#define F10_ONLINE_SPARE_SWAPDONE0(x) ((x) & BIT(1))
#define F10_ONLINE_SPARE_SWAPDONE1(x) ((x) & BIT(3))
#define F10_ONLINE_SPARE_BADDRAM_CS0(x) (((x) >> 4) & 0x00000007)
#define F10_ONLINE_SPARE_BADDRAM_CS1(x) (((x) >> 8) & 0x00000007)
#define F10_NB_ARRAY_ADDR 0xB8
#define F10_NB_ARRAY_DRAM_ECC 0x80000000
/* Bits [2:1] are used to select 16-byte section within a 64-byte cacheline */
#define SET_NB_ARRAY_ADDRESS(section) (((section) & 0x3) << 1)
#define F10_NB_ARRAY_DATA 0xBC
#define SET_NB_DRAM_INJECTION_WRITE(word, bits) \
(BIT(((word) & 0xF) + 20) | \
BIT(17) | bits)
#define SET_NB_DRAM_INJECTION_READ(word, bits) \
(BIT(((word) & 0xF) + 20) | \
BIT(16) | bits)
#define K8_NBCAP 0xE8
#define K8_NBCAP_CORES (BIT(12)|BIT(13))
#define K8_NBCAP_CHIPKILL BIT(4)
#define K8_NBCAP_SECDED BIT(3)
#define K8_NBCAP_DCT_DUAL BIT(0)
/* MSRs */
#define K8_MSR_MCGCTL_NBE BIT(4)
#define K8_MSR_MC4CTL 0x0410
#define K8_MSR_MC4STAT 0x0411
#define K8_MSR_MC4ADDR 0x0412
/* AMD sets the first MC device at device ID 0x18. */
static inline int get_node_id(struct pci_dev *pdev)
{
return PCI_SLOT(pdev->devfn) - 0x18;
}
enum amd64_chipset_families {
K8_CPUS = 0,
F10_CPUS,
F11_CPUS,
};
/* Error injection control structure */
struct error_injection {
u32 section;
u32 word;
u32 bit_map;
};
struct amd64_pvt {
/* pci_device handles which we utilize */
struct pci_dev *addr_f1_ctl;
struct pci_dev *dram_f2_ctl;
struct pci_dev *misc_f3_ctl;
int mc_node_id; /* MC index of this MC node */
int ext_model; /* extended model value of this node */
struct low_ops *ops; /* pointer to per PCI Device ID func table */
int channel_count;
/* Raw registers */
u32 dclr0; /* DRAM Configuration Low DCT0 reg */
u32 dclr1; /* DRAM Configuration Low DCT1 reg */
u32 dchr0; /* DRAM Configuration High DCT0 reg */
u32 dchr1; /* DRAM Configuration High DCT1 reg */
u32 nbcap; /* North Bridge Capabilities */
u32 nbcfg; /* F10 North Bridge Configuration */
u32 ext_nbcfg; /* Extended F10 North Bridge Configuration */
u32 dhar; /* DRAM Hoist reg */
u32 dbam0; /* DRAM Base Address Mapping reg for DCT0 */
u32 dbam1; /* DRAM Base Address Mapping reg for DCT1 */
/* DRAM CS Base Address Registers F2x[1,0][5C:40] */
u32 dcsb0[MAX_CS_COUNT];
u32 dcsb1[MAX_CS_COUNT];
/* DRAM CS Mask Registers F2x[1,0][6C:60] */
u32 dcsm0[MAX_CS_COUNT];
u32 dcsm1[MAX_CS_COUNT];
/*
* Decoded parts of DRAM BASE and LIMIT Registers
* F1x[78,70,68,60,58,50,48,40]
*/
u64 dram_base[DRAM_REG_COUNT];
u64 dram_limit[DRAM_REG_COUNT];
u8 dram_IntlvSel[DRAM_REG_COUNT];
u8 dram_IntlvEn[DRAM_REG_COUNT];
u8 dram_DstNode[DRAM_REG_COUNT];
u8 dram_rw_en[DRAM_REG_COUNT];
/*
* The following fields are set at (load) run time, after CPU revision
* has been determined, since the dct_base and dct_mask registers vary
* based on revision
*/
u32 dcsb_base; /* DCSB base bits */
u32 dcsm_mask; /* DCSM mask bits */
u32 cs_count; /* num chip selects (== num DCSB registers) */
u32 num_dcsm; /* Number of DCSM registers */
u32 dcs_mask_notused; /* DCSM notused mask bits */
u32 dcs_shift; /* DCSB and DCSM shift value */
u64 top_mem; /* top of memory below 4GB */
u64 top_mem2; /* top of memory above 4GB */
u32 dram_ctl_select_low; /* DRAM Controller Select Low Reg */
u32 dram_ctl_select_high; /* DRAM Controller Select High Reg */
u32 online_spare; /* On-Line spare Reg */
/* temp storage for when input is received from sysfs */
struct err_regs ctl_error_info;
/* place to store error injection parameters prior to issue */
struct error_injection injection;
/* Save old hw registers' values before we modified them */
u32 nbctl_mcgctl_saved; /* When true, following 2 are valid */
u32 old_nbctl;
/* MC Type Index value: socket F vs Family 10h */
u32 mc_type_index;
/* misc settings */
struct flags {
unsigned long cf8_extcfg:1;
unsigned long nb_mce_enable:1;
unsigned long nb_ecc_prev:1;
} flags;
};
struct scrubrate {
u32 scrubval; /* bit pattern for scrub rate */
u32 bandwidth; /* bandwidth consumed (bytes/sec) */
};
extern struct scrubrate scrubrates[23];
extern const char *tt_msgs[4];
extern const char *ll_msgs[4];
extern const char *rrrr_msgs[16];
extern const char *to_msgs[2];
extern const char *pp_msgs[4];
extern const char *ii_msgs[4];
extern const char *ext_msgs[32];
extern const char *htlink_msgs[8];
#ifdef CONFIG_EDAC_DEBUG
#define NUM_DBG_ATTRS 9
#else
#define NUM_DBG_ATTRS 0
#endif
#ifdef CONFIG_EDAC_AMD64_ERROR_INJECTION
#define NUM_INJ_ATTRS 5
#else
#define NUM_INJ_ATTRS 0
#endif
extern struct mcidev_sysfs_attribute amd64_dbg_attrs[NUM_DBG_ATTRS],
amd64_inj_attrs[NUM_INJ_ATTRS];
/*
* Each of the PCI Device IDs types have their own set of hardware accessor
* functions and per device encoding/decoding logic.
*/
struct low_ops {
int (*early_channel_count) (struct amd64_pvt *pvt);
u64 (*get_error_address) (struct mem_ctl_info *mci,
struct err_regs *info);
void (*read_dram_base_limit) (struct amd64_pvt *pvt, int dram);
void (*read_dram_ctl_register) (struct amd64_pvt *pvt);
void (*map_sysaddr_to_csrow) (struct mem_ctl_info *mci,
struct err_regs *info, u64 SystemAddr);
int (*dbam_to_cs) (struct amd64_pvt *pvt, int cs_mode);
};
struct amd64_family_type {
const char *ctl_name;
u16 addr_f1_ctl;
u16 misc_f3_ctl;
struct low_ops ops;
};
static struct amd64_family_type amd64_family_types[];
static inline const char *get_amd_family_name(int index)
{
return amd64_family_types[index].ctl_name;
}
static inline struct low_ops *family_ops(int index)
{
return &amd64_family_types[index].ops;
}
static inline int amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset,
u32 *val, const char *func)
{
int err = 0;
err = pci_read_config_dword(pdev, offset, val);
if (err)
amd64_printk(KERN_WARNING, "%s: error reading F%dx%x.\n",
func, PCI_FUNC(pdev->devfn), offset);
return err;
}
#define amd64_read_pci_cfg(pdev, offset, val) \
amd64_read_pci_cfg_dword(pdev, offset, val, __func__)
/*
* For future CPU versions, verify the following as new 'slow' rates appear and
* modify the necessary skip values for the supported CPU.
*/
#define K8_MIN_SCRUB_RATE_BITS 0x0
#define F10_MIN_SCRUB_RATE_BITS 0x5
#define F11_MIN_SCRUB_RATE_BITS 0x6
int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
u64 *hole_offset, u64 *hole_size);
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