| /* |
| * 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 <bp@alien8.de>: |
| * - 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 "mce_amd.h" |
| |
| #define amd64_debug(fmt, arg...) \ |
| edac_printk(KERN_DEBUG, "amd64", fmt, ##arg) |
| |
| #define amd64_info(fmt, arg...) \ |
| edac_printk(KERN_INFO, "amd64", fmt, ##arg) |
| |
| #define amd64_notice(fmt, arg...) \ |
| edac_printk(KERN_NOTICE, "amd64", fmt, ##arg) |
| |
| #define amd64_warn(fmt, arg...) \ |
| edac_printk(KERN_WARNING, "amd64", fmt, ##arg) |
| |
| #define amd64_err(fmt, arg...) \ |
| edac_printk(KERN_ERR, "amd64", fmt, ##arg) |
| |
| #define amd64_mc_warn(mci, fmt, arg...) \ |
| edac_mc_chipset_printk(mci, KERN_WARNING, "amd64", fmt, ##arg) |
| |
| #define amd64_mc_err(mci, fmt, arg...) \ |
| edac_mc_chipset_printk(mci, KERN_ERR, "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 "3.4.0" |
| #define EDAC_MOD_STR "amd64_edac" |
| |
| /* 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 NUM_CHIPSELECTS 8 |
| #define DRAM_RANGES 8 |
| |
| #define ON true |
| #define OFF false |
| |
| /* |
| * Create a contiguous bitmask starting at bit position @lo and ending at |
| * position @hi. For example |
| * |
| * GENMASK(21, 39) gives us the 64bit vector 0x000000ffffe00000. |
| */ |
| #define GENMASK(lo, hi) (((1ULL << ((hi) - (lo) + 1)) - 1) << (lo)) |
| |
| /* |
| * PCI-defined configuration space registers |
| */ |
| #define PCI_DEVICE_ID_AMD_15H_NB_F1 0x1601 |
| #define PCI_DEVICE_ID_AMD_15H_NB_F2 0x1602 |
| |
| |
| /* |
| * Function 1 - Address Map |
| */ |
| #define DRAM_BASE_LO 0x40 |
| #define DRAM_LIMIT_LO 0x44 |
| |
| #define dram_intlv_en(pvt, i) ((u8)((pvt->ranges[i].base.lo >> 8) & 0x7)) |
| #define dram_rw(pvt, i) ((u8)(pvt->ranges[i].base.lo & 0x3)) |
| #define dram_intlv_sel(pvt, i) ((u8)((pvt->ranges[i].lim.lo >> 8) & 0x7)) |
| #define dram_dst_node(pvt, i) ((u8)(pvt->ranges[i].lim.lo & 0x7)) |
| |
| #define DHAR 0xf0 |
| #define dhar_valid(pvt) ((pvt)->dhar & BIT(0)) |
| #define dhar_mem_hoist_valid(pvt) ((pvt)->dhar & BIT(1)) |
| #define dhar_base(pvt) ((pvt)->dhar & 0xff000000) |
| #define k8_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff00) << 16) |
| |
| /* NOTE: Extra mask bit vs K8 */ |
| #define f10_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff80) << 16) |
| |
| #define DCT_CFG_SEL 0x10C |
| |
| #define DRAM_LOCAL_NODE_BASE 0x120 |
| #define DRAM_LOCAL_NODE_LIM 0x124 |
| |
| #define DRAM_BASE_HI 0x140 |
| #define DRAM_LIMIT_HI 0x144 |
| |
| |
| /* |
| * Function 2 - DRAM controller |
| */ |
| #define DCSB0 0x40 |
| #define DCSB1 0x140 |
| #define DCSB_CS_ENABLE BIT(0) |
| |
| #define DCSM0 0x60 |
| #define DCSM1 0x160 |
| |
| #define csrow_enabled(i, dct, pvt) ((pvt)->csels[(dct)].csbases[(i)] & DCSB_CS_ENABLE) |
| |
| #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 DCLR0 0x90 |
| #define DCLR1 0x190 |
| #define REVE_WIDTH_128 BIT(16) |
| #define WIDTH_128 BIT(11) |
| |
| #define DCHR0 0x94 |
| #define DCHR1 0x194 |
| #define DDR3_MODE BIT(8) |
| |
| #define DCT_SEL_LO 0x110 |
| #define dct_sel_baseaddr(pvt) ((pvt)->dct_sel_lo & 0xFFFFF800) |
| #define dct_sel_interleave_addr(pvt) (((pvt)->dct_sel_lo >> 6) & 0x3) |
| #define dct_high_range_enabled(pvt) ((pvt)->dct_sel_lo & BIT(0)) |
| #define dct_interleave_enabled(pvt) ((pvt)->dct_sel_lo & BIT(2)) |
| |
| #define dct_ganging_enabled(pvt) ((boot_cpu_data.x86 == 0x10) && ((pvt)->dct_sel_lo & BIT(4))) |
| |
| #define dct_data_intlv_enabled(pvt) ((pvt)->dct_sel_lo & BIT(5)) |
| #define dct_memory_cleared(pvt) ((pvt)->dct_sel_lo & BIT(10)) |
| |
| #define SWAP_INTLV_REG 0x10c |
| |
| #define DCT_SEL_HI 0x114 |
| |
| /* |
| * Function 3 - Misc Control |
| */ |
| #define NBCTL 0x40 |
| |
| #define NBCFG 0x44 |
| #define NBCFG_CHIPKILL BIT(23) |
| #define NBCFG_ECC_ENABLE BIT(22) |
| |
| /* F3x48: NBSL */ |
| #define F10_NBSL_EXT_ERR_ECC 0x8 |
| #define NBSL_PP_OBS 0x2 |
| |
| #define SCRCTRL 0x58 |
| |
| #define F10_ONLINE_SPARE 0xB0 |
| #define online_spare_swap_done(pvt, c) (((pvt)->online_spare >> (1 + 2 * (c))) & 0x1) |
| #define online_spare_bad_dramcs(pvt, c) (((pvt)->online_spare >> (4 + 4 * (c))) & 0x7) |
| |
| #define F10_NB_ARRAY_ADDR 0xB8 |
| #define F10_NB_ARRAY_DRAM BIT(31) |
| |
| /* Bits [2:1] are used to select 16-byte section within a 64-byte cacheline */ |
| #define SET_NB_ARRAY_ADDR(section) (((section) & 0x3) << 1) |
| |
| #define F10_NB_ARRAY_DATA 0xBC |
| #define F10_NB_ARR_ECC_WR_REQ BIT(17) |
| #define SET_NB_DRAM_INJECTION_WRITE(inj) \ |
| (BIT(((inj.word) & 0xF) + 20) | \ |
| F10_NB_ARR_ECC_WR_REQ | inj.bit_map) |
| #define SET_NB_DRAM_INJECTION_READ(inj) \ |
| (BIT(((inj.word) & 0xF) + 20) | \ |
| BIT(16) | inj.bit_map) |
| |
| |
| #define NBCAP 0xE8 |
| #define NBCAP_CHIPKILL BIT(4) |
| #define NBCAP_SECDED BIT(3) |
| #define NBCAP_DCT_DUAL BIT(0) |
| |
| #define EXT_NB_MCA_CFG 0x180 |
| |
| /* MSRs */ |
| #define MSR_MCGCTL_NBE BIT(4) |
| |
| /* AMD sets the first MC device at device ID 0x18. */ |
| static inline u8 get_node_id(struct pci_dev *pdev) |
| { |
| return PCI_SLOT(pdev->devfn) - 0x18; |
| } |
| |
| enum amd_families { |
| K8_CPUS = 0, |
| F10_CPUS, |
| F15_CPUS, |
| NUM_FAMILIES, |
| }; |
| |
| /* Error injection control structure */ |
| struct error_injection { |
| u32 section; |
| u32 word; |
| u32 bit_map; |
| }; |
| |
| /* low and high part of PCI config space regs */ |
| struct reg_pair { |
| u32 lo, hi; |
| }; |
| |
| /* |
| * See F1x[1, 0][7C:40] DRAM Base/Limit Registers |
| */ |
| struct dram_range { |
| struct reg_pair base; |
| struct reg_pair lim; |
| }; |
| |
| /* A DCT chip selects collection */ |
| struct chip_select { |
| u32 csbases[NUM_CHIPSELECTS]; |
| u8 b_cnt; |
| |
| u32 csmasks[NUM_CHIPSELECTS]; |
| u8 m_cnt; |
| }; |
| |
| struct amd64_pvt { |
| struct low_ops *ops; |
| |
| /* pci_device handles which we utilize */ |
| struct pci_dev *F1, *F2, *F3; |
| |
| unsigned mc_node_id; /* MC index of this MC node */ |
| int ext_model; /* extended model value of this node */ |
| 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 */ |
| |
| /* one for each DCT */ |
| struct chip_select csels[2]; |
| |
| /* DRAM base and limit pairs F1x[78,70,68,60,58,50,48,40] */ |
| struct dram_range ranges[DRAM_RANGES]; |
| |
| u64 top_mem; /* top of memory below 4GB */ |
| u64 top_mem2; /* top of memory above 4GB */ |
| |
| u32 dct_sel_lo; /* DRAM Controller Select Low */ |
| u32 dct_sel_hi; /* DRAM Controller Select High */ |
| u32 online_spare; /* On-Line spare Reg */ |
| |
| /* x4 or x8 syndromes in use */ |
| u8 ecc_sym_sz; |
| |
| /* place to store error injection parameters prior to issue */ |
| struct error_injection injection; |
| }; |
| |
| enum err_codes { |
| DECODE_OK = 0, |
| ERR_NODE = -1, |
| ERR_CSROW = -2, |
| ERR_CHANNEL = -3, |
| }; |
| |
| struct err_info { |
| int err_code; |
| struct mem_ctl_info *src_mci; |
| int csrow; |
| int channel; |
| u16 syndrome; |
| u32 page; |
| u32 offset; |
| }; |
| |
| static inline u64 get_dram_base(struct amd64_pvt *pvt, unsigned i) |
| { |
| u64 addr = ((u64)pvt->ranges[i].base.lo & 0xffff0000) << 8; |
| |
| if (boot_cpu_data.x86 == 0xf) |
| return addr; |
| |
| return (((u64)pvt->ranges[i].base.hi & 0x000000ff) << 40) | addr; |
| } |
| |
| static inline u64 get_dram_limit(struct amd64_pvt *pvt, unsigned i) |
| { |
| u64 lim = (((u64)pvt->ranges[i].lim.lo & 0xffff0000) << 8) | 0x00ffffff; |
| |
| if (boot_cpu_data.x86 == 0xf) |
| return lim; |
| |
| return (((u64)pvt->ranges[i].lim.hi & 0x000000ff) << 40) | lim; |
| } |
| |
| static inline u16 extract_syndrome(u64 status) |
| { |
| return ((status >> 47) & 0xff) | ((status >> 16) & 0xff00); |
| } |
| |
| /* |
| * per-node ECC settings descriptor |
| */ |
| struct ecc_settings { |
| u32 old_nbctl; |
| bool nbctl_valid; |
| |
| struct flags { |
| unsigned long nb_mce_enable:1; |
| unsigned long nb_ecc_prev:1; |
| } flags; |
| }; |
| |
| #ifdef CONFIG_EDAC_DEBUG |
| int amd64_create_sysfs_dbg_files(struct mem_ctl_info *mci); |
| void amd64_remove_sysfs_dbg_files(struct mem_ctl_info *mci); |
| |
| #else |
| static inline int amd64_create_sysfs_dbg_files(struct mem_ctl_info *mci) |
| { |
| return 0; |
| } |
| static void inline amd64_remove_sysfs_dbg_files(struct mem_ctl_info *mci) |
| { |
| } |
| #endif |
| |
| #ifdef CONFIG_EDAC_AMD64_ERROR_INJECTION |
| int amd64_create_sysfs_inject_files(struct mem_ctl_info *mci); |
| void amd64_remove_sysfs_inject_files(struct mem_ctl_info *mci); |
| |
| #else |
| static inline int amd64_create_sysfs_inject_files(struct mem_ctl_info *mci) |
| { |
| return 0; |
| } |
| static inline void amd64_remove_sysfs_inject_files(struct mem_ctl_info *mci) |
| { |
| } |
| #endif |
| |
| /* |
| * 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); |
| void (*map_sysaddr_to_csrow) (struct mem_ctl_info *mci, u64 sys_addr, |
| struct err_info *); |
| int (*dbam_to_cs) (struct amd64_pvt *pvt, u8 dct, unsigned cs_mode); |
| int (*read_dct_pci_cfg) (struct amd64_pvt *pvt, int offset, |
| u32 *val, const char *func); |
| }; |
| |
| struct amd64_family_type { |
| const char *ctl_name; |
| u16 f1_id, f3_id; |
| struct low_ops ops; |
| }; |
| |
| int __amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset, |
| u32 *val, const char *func); |
| int __amd64_write_pci_cfg_dword(struct pci_dev *pdev, int offset, |
| u32 val, const char *func); |
| |
| #define amd64_read_pci_cfg(pdev, offset, val) \ |
| __amd64_read_pci_cfg_dword(pdev, offset, val, __func__) |
| |
| #define amd64_write_pci_cfg(pdev, offset, val) \ |
| __amd64_write_pci_cfg_dword(pdev, offset, val, __func__) |
| |
| #define amd64_read_dct_pci_cfg(pvt, offset, val) \ |
| pvt->ops->read_dct_pci_cfg(pvt, offset, val, __func__) |
| |
| int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base, |
| u64 *hole_offset, u64 *hole_size); |
| |
| #define to_mci(k) container_of(k, struct mem_ctl_info, dev) |
| |
| /* Injection helpers */ |
| static inline void disable_caches(void *dummy) |
| { |
| write_cr0(read_cr0() | X86_CR0_CD); |
| wbinvd(); |
| } |
| |
| static inline void enable_caches(void *dummy) |
| { |
| write_cr0(read_cr0() & ~X86_CR0_CD); |
| } |