forked from Minki/linux
390944439f
Make the ->{get|set}_sdram_scrub_rate return the actual scrub rate
bandwidth it succeeded setting and remove superfluous arg pointer used
for that. A negative value returned still means that an error occurred
while setting the scrubrate. Document this for future reference.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
555 lines
16 KiB
C
555 lines
16 KiB
C
/*
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* AMD64 class Memory Controller kernel module
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*
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* Copyright (c) 2009 SoftwareBitMaker.
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* Copyright (c) 2009 Advanced Micro Devices, Inc.
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*
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* This file may be distributed under the terms of the
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* GNU General Public License.
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*
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* Originally Written by Thayne Harbaugh
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*
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* Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
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* - K8 CPU Revision D and greater support
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*
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* Changes by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>:
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* - Module largely rewritten, with new (and hopefully correct)
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* code for dealing with node and chip select interleaving,
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* various code cleanup, and bug fixes
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* - Added support for memory hoisting using DRAM hole address
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* register
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*
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* Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
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* -K8 Rev (1207) revision support added, required Revision
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* specific mini-driver code to support Rev F as well as
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* prior revisions
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*
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* Changes by Douglas "norsk" Thompson <dougthompson@xmission.com>:
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* -Family 10h revision support added. New PCI Device IDs,
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* indicating new changes. Actual registers modified
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* were slight, less than the Rev E to Rev F transition
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* but changing the PCI Device ID was the proper thing to
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* do, as it provides for almost automactic family
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* detection. The mods to Rev F required more family
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* information detection.
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*
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* Changes/Fixes by Borislav Petkov <borislav.petkov@amd.com>:
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* - misc fixes and code cleanups
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*
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* This module is based on the following documents
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* (available from http://www.amd.com/):
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*
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* Title: BIOS and Kernel Developer's Guide for AMD Athlon 64 and AMD
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* Opteron Processors
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* AMD publication #: 26094
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*` Revision: 3.26
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*
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* Title: BIOS and Kernel Developer's Guide for AMD NPT Family 0Fh
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* Processors
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* AMD publication #: 32559
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* Revision: 3.00
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* Issue Date: May 2006
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*
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* Title: BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h
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* Processors
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* AMD publication #: 31116
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* Revision: 3.00
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* Issue Date: September 07, 2007
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*
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* Sections in the first 2 documents are no longer in sync with each other.
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* The Family 10h BKDG was totally re-written from scratch with a new
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* presentation model.
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* Therefore, comments that refer to a Document section might be off.
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*/
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/pci_ids.h>
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#include <linux/slab.h>
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#include <linux/mmzone.h>
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#include <linux/edac.h>
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#include <asm/msr.h>
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#include "edac_core.h"
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#include "mce_amd.h"
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#define amd64_debug(fmt, arg...) \
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edac_printk(KERN_DEBUG, "amd64", fmt, ##arg)
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#define amd64_info(fmt, arg...) \
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edac_printk(KERN_INFO, "amd64", fmt, ##arg)
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#define amd64_notice(fmt, arg...) \
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edac_printk(KERN_NOTICE, "amd64", fmt, ##arg)
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#define amd64_warn(fmt, arg...) \
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edac_printk(KERN_WARNING, "amd64", fmt, ##arg)
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#define amd64_err(fmt, arg...) \
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edac_printk(KERN_ERR, "amd64", fmt, ##arg)
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#define amd64_mc_warn(mci, fmt, arg...) \
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edac_mc_chipset_printk(mci, KERN_WARNING, "amd64", fmt, ##arg)
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#define amd64_mc_err(mci, fmt, arg...) \
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edac_mc_chipset_printk(mci, KERN_ERR, "amd64", fmt, ##arg)
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/*
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* Throughout the comments in this code, the following terms are used:
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*
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* SysAddr, DramAddr, and InputAddr
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*
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* These terms come directly from the amd64 documentation
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* (AMD publication #26094). They are defined as follows:
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*
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* SysAddr:
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* This is a physical address generated by a CPU core or a device
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* doing DMA. If generated by a CPU core, a SysAddr is the result of
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* a virtual to physical address translation by the CPU core's address
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* translation mechanism (MMU).
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*
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* DramAddr:
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* A DramAddr is derived from a SysAddr by subtracting an offset that
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* depends on which node the SysAddr maps to and whether the SysAddr
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* is within a range affected by memory hoisting. The DRAM Base
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* (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers
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* determine which node a SysAddr maps to.
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*
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* If the DRAM Hole Address Register (DHAR) is enabled and the SysAddr
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* is within the range of addresses specified by this register, then
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* a value x from the DHAR is subtracted from the SysAddr to produce a
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* DramAddr. Here, x represents the base address for the node that
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* the SysAddr maps to plus an offset due to memory hoisting. See
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* section 3.4.8 and the comments in amd64_get_dram_hole_info() and
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* sys_addr_to_dram_addr() below for more information.
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*
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* If the SysAddr is not affected by the DHAR then a value y is
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* subtracted from the SysAddr to produce a DramAddr. Here, y is the
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* base address for the node that the SysAddr maps to. See section
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* 3.4.4 and the comments in sys_addr_to_dram_addr() below for more
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* information.
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*
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* InputAddr:
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* A DramAddr is translated to an InputAddr before being passed to the
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* memory controller for the node that the DramAddr is associated
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* with. The memory controller then maps the InputAddr to a csrow.
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* If node interleaving is not in use, then the InputAddr has the same
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* value as the DramAddr. Otherwise, the InputAddr is produced by
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* discarding the bits used for node interleaving from the DramAddr.
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* See section 3.4.4 for more information.
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*
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* The memory controller for a given node uses its DRAM CS Base and
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* DRAM CS Mask registers to map an InputAddr to a csrow. See
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* sections 3.5.4 and 3.5.5 for more information.
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*/
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#define EDAC_AMD64_VERSION "v3.3.0"
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#define EDAC_MOD_STR "amd64_edac"
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/* Extended Model from CPUID, for CPU Revision numbers */
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#define K8_REV_D 1
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#define K8_REV_E 2
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#define K8_REV_F 4
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/* Hardware limit on ChipSelect rows per MC and processors per system */
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#define MAX_CS_COUNT 8
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#define DRAM_REG_COUNT 8
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#define ON true
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#define OFF false
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/*
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* PCI-defined configuration space registers
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*/
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/*
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* Function 1 - Address Map
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*/
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#define K8_DRAM_BASE_LOW 0x40
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#define K8_DRAM_LIMIT_LOW 0x44
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#define K8_DHAR 0xf0
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#define DHAR_VALID BIT(0)
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#define F10_DRAM_MEM_HOIST_VALID BIT(1)
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#define DHAR_BASE_MASK 0xff000000
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#define dhar_base(dhar) (dhar & DHAR_BASE_MASK)
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#define K8_DHAR_OFFSET_MASK 0x0000ff00
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#define k8_dhar_offset(dhar) ((dhar & K8_DHAR_OFFSET_MASK) << 16)
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#define F10_DHAR_OFFSET_MASK 0x0000ff80
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/* NOTE: Extra mask bit vs K8 */
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#define f10_dhar_offset(dhar) ((dhar & F10_DHAR_OFFSET_MASK) << 16)
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/* F10 High BASE/LIMIT registers */
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#define F10_DRAM_BASE_HIGH 0x140
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#define F10_DRAM_LIMIT_HIGH 0x144
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/*
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* Function 2 - DRAM controller
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*/
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#define K8_DCSB0 0x40
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#define F10_DCSB1 0x140
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#define K8_DCSB_CS_ENABLE BIT(0)
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#define K8_DCSB_NPT_SPARE BIT(1)
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#define K8_DCSB_NPT_TESTFAIL BIT(2)
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/*
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* REV E: select [31:21] and [15:9] from DCSB and the shift amount to form
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* the address
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*/
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#define REV_E_DCSB_BASE_BITS (0xFFE0FE00ULL)
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#define REV_E_DCS_SHIFT 4
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#define REV_F_F1Xh_DCSB_BASE_BITS (0x1FF83FE0ULL)
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#define REV_F_F1Xh_DCS_SHIFT 8
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/*
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* REV F and later: selects [28:19] and [13:5] from DCSB and the shift amount
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* to form the address
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*/
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#define REV_F_DCSB_BASE_BITS (0x1FF83FE0ULL)
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#define REV_F_DCS_SHIFT 8
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/* DRAM CS Mask Registers */
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#define K8_DCSM0 0x60
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#define F10_DCSM1 0x160
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/* REV E: select [29:21] and [15:9] from DCSM */
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#define REV_E_DCSM_MASK_BITS 0x3FE0FE00
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/* unused bits [24:20] and [12:0] */
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#define REV_E_DCS_NOTUSED_BITS 0x01F01FFF
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/* REV F and later: select [28:19] and [13:5] from DCSM */
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#define REV_F_F1Xh_DCSM_MASK_BITS 0x1FF83FE0
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/* unused bits [26:22] and [12:0] */
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#define REV_F_F1Xh_DCS_NOTUSED_BITS 0x07C01FFF
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#define DBAM0 0x80
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#define DBAM1 0x180
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/* Extract the DIMM 'type' on the i'th DIMM from the DBAM reg value passed */
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#define DBAM_DIMM(i, reg) ((((reg) >> (4*i))) & 0xF)
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#define DBAM_MAX_VALUE 11
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#define F10_DCLR_0 0x90
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#define F10_DCLR_1 0x190
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#define REVE_WIDTH_128 BIT(16)
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#define F10_WIDTH_128 BIT(11)
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#define F10_DCHR_0 0x94
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#define F10_DCHR_1 0x194
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#define F10_DCHR_FOUR_RANK_DIMM BIT(18)
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#define DDR3_MODE BIT(8)
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#define F10_DCHR_MblMode BIT(6)
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#define F10_DCTL_SEL_LOW 0x110
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#define dct_sel_baseaddr(pvt) ((pvt->dram_ctl_select_low) & 0xFFFFF800)
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#define dct_sel_interleave_addr(pvt) (((pvt->dram_ctl_select_low) >> 6) & 0x3)
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#define dct_high_range_enabled(pvt) (pvt->dram_ctl_select_low & BIT(0))
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#define dct_interleave_enabled(pvt) (pvt->dram_ctl_select_low & BIT(2))
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#define dct_ganging_enabled(pvt) (pvt->dram_ctl_select_low & BIT(4))
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#define dct_data_intlv_enabled(pvt) (pvt->dram_ctl_select_low & BIT(5))
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#define dct_dram_enabled(pvt) (pvt->dram_ctl_select_low & BIT(8))
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#define dct_memory_cleared(pvt) (pvt->dram_ctl_select_low & BIT(10))
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#define F10_DCTL_SEL_HIGH 0x114
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/*
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* Function 3 - Misc Control
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*/
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#define K8_NBCTL 0x40
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/* Correctable ECC error reporting enable */
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#define K8_NBCTL_CECCEn BIT(0)
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/* UnCorrectable ECC error reporting enable */
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#define K8_NBCTL_UECCEn BIT(1)
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#define K8_NBCFG 0x44
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#define K8_NBCFG_CHIPKILL BIT(23)
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#define K8_NBCFG_ECC_ENABLE BIT(22)
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#define K8_NBSL 0x48
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/* Family F10h: Normalized Extended Error Codes */
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#define F10_NBSL_EXT_ERR_RES 0x0
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#define F10_NBSL_EXT_ERR_ECC 0x8
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/* Next two are overloaded values */
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#define F10_NBSL_EXT_ERR_LINK_PROTO 0xB
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#define F10_NBSL_EXT_ERR_L3_PROTO 0xB
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#define F10_NBSL_EXT_ERR_NB_ARRAY 0xC
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#define F10_NBSL_EXT_ERR_DRAM_PARITY 0xD
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#define F10_NBSL_EXT_ERR_LINK_RETRY 0xE
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/* Next two are overloaded values */
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#define F10_NBSL_EXT_ERR_GART_WALK 0xF
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#define F10_NBSL_EXT_ERR_DEV_WALK 0xF
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/* 0x10 to 0x1B: Reserved */
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#define F10_NBSL_EXT_ERR_L3_DATA 0x1C
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#define F10_NBSL_EXT_ERR_L3_TAG 0x1D
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#define F10_NBSL_EXT_ERR_L3_LRU 0x1E
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/* K8: Normalized Extended Error Codes */
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#define K8_NBSL_EXT_ERR_ECC 0x0
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#define K8_NBSL_EXT_ERR_CRC 0x1
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#define K8_NBSL_EXT_ERR_SYNC 0x2
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#define K8_NBSL_EXT_ERR_MST 0x3
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#define K8_NBSL_EXT_ERR_TGT 0x4
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#define K8_NBSL_EXT_ERR_GART 0x5
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#define K8_NBSL_EXT_ERR_RMW 0x6
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#define K8_NBSL_EXT_ERR_WDT 0x7
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#define K8_NBSL_EXT_ERR_CHIPKILL_ECC 0x8
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#define K8_NBSL_EXT_ERR_DRAM_PARITY 0xD
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/*
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* The following are for BUS type errors AFTER values have been normalized by
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* shifting right
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*/
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#define K8_NBSL_PP_SRC 0x0
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#define K8_NBSL_PP_RES 0x1
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#define K8_NBSL_PP_OBS 0x2
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#define K8_NBSL_PP_GENERIC 0x3
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#define EXTRACT_ERR_CPU_MAP(x) ((x) & 0xF)
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#define K8_NBEAL 0x50
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#define K8_NBEAH 0x54
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#define K8_SCRCTRL 0x58
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#define F10_NB_CFG_LOW 0x88
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#define F10_ONLINE_SPARE 0xB0
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#define F10_ONLINE_SPARE_SWAPDONE0(x) ((x) & BIT(1))
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#define F10_ONLINE_SPARE_SWAPDONE1(x) ((x) & BIT(3))
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#define F10_ONLINE_SPARE_BADDRAM_CS0(x) (((x) >> 4) & 0x00000007)
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#define F10_ONLINE_SPARE_BADDRAM_CS1(x) (((x) >> 8) & 0x00000007)
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#define F10_NB_ARRAY_ADDR 0xB8
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#define F10_NB_ARRAY_DRAM_ECC 0x80000000
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/* Bits [2:1] are used to select 16-byte section within a 64-byte cacheline */
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#define SET_NB_ARRAY_ADDRESS(section) (((section) & 0x3) << 1)
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#define F10_NB_ARRAY_DATA 0xBC
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#define SET_NB_DRAM_INJECTION_WRITE(word, bits) \
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(BIT(((word) & 0xF) + 20) | \
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BIT(17) | bits)
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#define SET_NB_DRAM_INJECTION_READ(word, bits) \
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(BIT(((word) & 0xF) + 20) | \
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BIT(16) | bits)
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#define K8_NBCAP 0xE8
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#define K8_NBCAP_CORES (BIT(12)|BIT(13))
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#define K8_NBCAP_CHIPKILL BIT(4)
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#define K8_NBCAP_SECDED BIT(3)
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#define K8_NBCAP_DCT_DUAL BIT(0)
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#define EXT_NB_MCA_CFG 0x180
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/* MSRs */
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#define K8_MSR_MCGCTL_NBE BIT(4)
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#define K8_MSR_MC4CTL 0x0410
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#define K8_MSR_MC4STAT 0x0411
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#define K8_MSR_MC4ADDR 0x0412
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/* AMD sets the first MC device at device ID 0x18. */
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static inline int get_node_id(struct pci_dev *pdev)
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{
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return PCI_SLOT(pdev->devfn) - 0x18;
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}
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enum amd64_chipset_families {
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K8_CPUS = 0,
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F10_CPUS,
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};
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/* Error injection control structure */
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struct error_injection {
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u32 section;
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u32 word;
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u32 bit_map;
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};
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struct amd64_pvt {
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struct low_ops *ops;
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/* pci_device handles which we utilize */
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struct pci_dev *F1, *F2, *F3;
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int mc_node_id; /* MC index of this MC node */
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int ext_model; /* extended model value of this node */
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int channel_count;
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/* Raw registers */
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u32 dclr0; /* DRAM Configuration Low DCT0 reg */
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u32 dclr1; /* DRAM Configuration Low DCT1 reg */
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u32 dchr0; /* DRAM Configuration High DCT0 reg */
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u32 dchr1; /* DRAM Configuration High DCT1 reg */
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u32 nbcap; /* North Bridge Capabilities */
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u32 nbcfg; /* F10 North Bridge Configuration */
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u32 ext_nbcfg; /* Extended F10 North Bridge Configuration */
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u32 dhar; /* DRAM Hoist reg */
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u32 dbam0; /* DRAM Base Address Mapping reg for DCT0 */
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u32 dbam1; /* DRAM Base Address Mapping reg for DCT1 */
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/* DRAM CS Base Address Registers F2x[1,0][5C:40] */
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u32 dcsb0[MAX_CS_COUNT];
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u32 dcsb1[MAX_CS_COUNT];
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/* DRAM CS Mask Registers F2x[1,0][6C:60] */
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u32 dcsm0[MAX_CS_COUNT];
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u32 dcsm1[MAX_CS_COUNT];
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/*
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* Decoded parts of DRAM BASE and LIMIT Registers
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* F1x[78,70,68,60,58,50,48,40]
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*/
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u64 dram_base[DRAM_REG_COUNT];
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u64 dram_limit[DRAM_REG_COUNT];
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u8 dram_IntlvSel[DRAM_REG_COUNT];
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u8 dram_IntlvEn[DRAM_REG_COUNT];
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u8 dram_DstNode[DRAM_REG_COUNT];
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u8 dram_rw_en[DRAM_REG_COUNT];
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/*
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* The following fields are set at (load) run time, after CPU revision
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* has been determined, since the dct_base and dct_mask registers vary
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* based on revision
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*/
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u32 dcsb_base; /* DCSB base bits */
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u32 dcsm_mask; /* DCSM mask bits */
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u32 cs_count; /* num chip selects (== num DCSB registers) */
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u32 num_dcsm; /* Number of DCSM registers */
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u32 dcs_mask_notused; /* DCSM notused mask bits */
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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 */
|
|
|
|
/* x4 or x8 syndromes in use */
|
|
u8 syn_type;
|
|
|
|
/* 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;
|
|
|
|
/* DCT per-family scrubrate setting */
|
|
u32 min_scrubrate;
|
|
|
|
/* family name this instance is running on */
|
|
const char *ctl_name;
|
|
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
};
|
|
|
|
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 *htlink_msgs[8];
|
|
|
|
#ifdef CONFIG_EDAC_DEBUG
|
|
#define NUM_DBG_ATTRS 5
|
|
#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 f1_id, f3_id;
|
|
struct low_ops 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_warn("%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
|
|
|
|
int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
|
|
u64 *hole_offset, u64 *hole_size);
|