1033 lines
28 KiB
C
1033 lines
28 KiB
C
/*
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* Intel 7300 class Memory Controllers kernel module (Clarksboro)
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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 version 2 only.
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*
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* Copyright (c) 2010 by:
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* Mauro Carvalho Chehab <mchehab@redhat.com>
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*
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* Red Hat Inc. http://www.redhat.com
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*
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* Intel 7300 Chipset Memory Controller Hub (MCH) - Datasheet
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* http://www.intel.com/Assets/PDF/datasheet/318082.pdf
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*
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* TODO: The chipset allow checking for PCI Express errors also. Currently,
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* the driver covers only memory error errors
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*
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* This driver uses "csrows" EDAC attribute to represent DIMM slot#
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*/
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#include <linux/module.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/edac.h>
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#include <linux/mmzone.h>
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#include "edac_core.h"
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/*
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* Alter this version for the I7300 module when modifications are made
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*/
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#define I7300_REVISION " Ver: 1.0.0 " __DATE__
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#define EDAC_MOD_STR "i7300_edac"
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#define i7300_printk(level, fmt, arg...) \
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edac_printk(level, "i7300", fmt, ##arg)
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#define i7300_mc_printk(mci, level, fmt, arg...) \
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edac_mc_chipset_printk(mci, level, "i7300", fmt, ##arg)
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/*
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* Memory topology is organized as:
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* Branch 0 - 2 channels: channels 0 and 1 (FDB0 PCI dev 21.0)
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* Branch 1 - 2 channels: channels 2 and 3 (FDB1 PCI dev 22.0)
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* Each channel can have to 8 DIMM sets (called as SLOTS)
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* Slots should generally be filled in pairs
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* Except on Single Channel mode of operation
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* just slot 0/channel0 filled on this mode
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* On normal operation mode, the two channels on a branch should be
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* filled together for the same SLOT#
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* When in mirrored mode, Branch 1 replicate memory at Branch 0, so, the four
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* channels on both branches should be filled
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*/
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/* Limits for i7300 */
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#define MAX_SLOTS 8
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#define MAX_BRANCHES 2
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#define MAX_CH_PER_BRANCH 2
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#define MAX_CHANNELS (MAX_CH_PER_BRANCH * MAX_BRANCHES)
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#define MAX_MIR 3
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#define to_channel(ch, branch) ((((branch)) << 1) | (ch))
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#define to_csrow(slot, ch, branch) \
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(to_channel(ch, branch) | ((slot) << 2))
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/*
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* I7300 devices
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* All 3 functions of Device 16 (0,1,2) share the SAME DID and
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* uses PCI_DEVICE_ID_INTEL_I7300_MCH_ERR for device 16 (0,1,2),
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* PCI_DEVICE_ID_INTEL_I7300_MCH_FB0 and PCI_DEVICE_ID_INTEL_I7300_MCH_FB1
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* for device 21 (0,1).
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*/
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/****************************************************
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* i7300 Register definitions for memory enumberation
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****************************************************/
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/*
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* Device 16,
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* Function 0: System Address (not documented)
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* Function 1: Memory Branch Map, Control, Errors Register
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*/
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/* OFFSETS for Function 0 */
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#define AMBASE 0x48 /* AMB Mem Mapped Reg Region Base */
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#define MAXCH 0x56 /* Max Channel Number */
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#define MAXDIMMPERCH 0x57 /* Max DIMM PER Channel Number */
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/* OFFSETS for Function 1 */
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#define MC_SETTINGS 0x40
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#define IS_MIRRORED(mc) ((mc) & (1 << 16))
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#define IS_ECC_ENABLED(mc) ((mc) & (1 << 5))
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#define IS_RETRY_ENABLED(mc) ((mc) & (1 << 31))
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#define IS_SCRBALGO_ENHANCED(mc) ((mc) & (1 << 8))
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#define MC_SETTINGS_A 0x58
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#define IS_SINGLE_MODE(mca) ((mca) & (1 << 14))
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#define TOLM 0x6C
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#define REDMEMB 0x7C
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#define MIR0 0x80
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#define MIR1 0x84
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#define MIR2 0x88
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/*
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* Note: Other Intel EDAC drivers use AMBPRESENT to identify if the available
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* memory. From datasheet item 7.3.1 (FB-DIMM technology & organization), it
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* seems that we cannot use this information directly for the same usage.
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* Each memory slot may have up to 2 AMB interfaces, one for income and another
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* for outcome interface to the next slot.
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* For now, the driver just stores the AMB present registers, but rely only at
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* the MTR info to detect memory.
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* Datasheet is also not clear about how to map each AMBPRESENT registers to
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* one of the 4 available channels.
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*/
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#define AMBPRESENT_0 0x64
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#define AMBPRESENT_1 0x66
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const static u16 mtr_regs [MAX_SLOTS] = {
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0x80, 0x84, 0x88, 0x8c,
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0x82, 0x86, 0x8a, 0x8e
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};
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/* Defines to extract the vaious fields from the
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* MTRx - Memory Technology Registers
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*/
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#define MTR_DIMMS_PRESENT(mtr) ((mtr) & (1 << 8))
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#define MTR_DIMMS_ETHROTTLE(mtr) ((mtr) & (1 << 7))
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#define MTR_DRAM_WIDTH(mtr) (((mtr) & (1 << 6)) ? 8 : 4)
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#define MTR_DRAM_BANKS(mtr) (((mtr) & (1 << 5)) ? 8 : 4)
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#define MTR_DIMM_RANKS(mtr) (((mtr) & (1 << 4)) ? 1 : 0)
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#define MTR_DIMM_ROWS(mtr) (((mtr) >> 2) & 0x3)
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#define MTR_DRAM_BANKS_ADDR_BITS 2
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#define MTR_DIMM_ROWS_ADDR_BITS(mtr) (MTR_DIMM_ROWS(mtr) + 13)
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#define MTR_DIMM_COLS(mtr) ((mtr) & 0x3)
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#define MTR_DIMM_COLS_ADDR_BITS(mtr) (MTR_DIMM_COLS(mtr) + 10)
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#ifdef CONFIG_EDAC_DEBUG
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/* MTR NUMROW */
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static const char *numrow_toString[] = {
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"8,192 - 13 rows",
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"16,384 - 14 rows",
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"32,768 - 15 rows",
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"65,536 - 16 rows"
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};
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/* MTR NUMCOL */
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static const char *numcol_toString[] = {
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"1,024 - 10 columns",
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"2,048 - 11 columns",
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"4,096 - 12 columns",
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"reserved"
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};
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#endif
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/************************************************
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* i7300 Register definitions for error detection
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************************************************/
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/*
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* Device 16.2: Global Error Registers
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*/
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#define FERR_GLOBAL_HI 0x48
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static const char *ferr_global_hi_name[] = {
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[3] = "FSB 3 Fatal Error",
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[2] = "FSB 2 Fatal Error",
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[1] = "FSB 1 Fatal Error",
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[0] = "FSB 0 Fatal Error",
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};
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#define ferr_global_hi_is_fatal(errno) 1
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#define FERR_GLOBAL_LO 0x40
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static const char *ferr_global_lo_name[] = {
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[31] = "Internal MCH Fatal Error",
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[30] = "Intel QuickData Technology Device Fatal Error",
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[29] = "FSB1 Fatal Error",
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[28] = "FSB0 Fatal Error",
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[27] = "FBD Channel 3 Fatal Error",
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[26] = "FBD Channel 2 Fatal Error",
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[25] = "FBD Channel 1 Fatal Error",
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[24] = "FBD Channel 0 Fatal Error",
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[23] = "PCI Express Device 7Fatal Error",
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[22] = "PCI Express Device 6 Fatal Error",
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[21] = "PCI Express Device 5 Fatal Error",
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[20] = "PCI Express Device 4 Fatal Error",
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[19] = "PCI Express Device 3 Fatal Error",
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[18] = "PCI Express Device 2 Fatal Error",
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[17] = "PCI Express Device 1 Fatal Error",
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[16] = "ESI Fatal Error",
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[15] = "Internal MCH Non-Fatal Error",
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[14] = "Intel QuickData Technology Device Non Fatal Error",
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[13] = "FSB1 Non-Fatal Error",
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[12] = "FSB 0 Non-Fatal Error",
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[11] = "FBD Channel 3 Non-Fatal Error",
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[10] = "FBD Channel 2 Non-Fatal Error",
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[9] = "FBD Channel 1 Non-Fatal Error",
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[8] = "FBD Channel 0 Non-Fatal Error",
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[7] = "PCI Express Device 7 Non-Fatal Error",
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[6] = "PCI Express Device 6 Non-Fatal Error",
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[5] = "PCI Express Device 5 Non-Fatal Error",
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[4] = "PCI Express Device 4 Non-Fatal Error",
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[3] = "PCI Express Device 3 Non-Fatal Error",
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[2] = "PCI Express Device 2 Non-Fatal Error",
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[1] = "PCI Express Device 1 Non-Fatal Error",
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[0] = "ESI Non-Fatal Error",
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};
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#define ferr_global_lo_is_fatal(errno) ((errno < 16) ? 0 : 1)
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/* Device name and register DID (Device ID) */
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struct i7300_dev_info {
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const char *ctl_name; /* name for this device */
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u16 fsb_mapping_errors; /* DID for the branchmap,control */
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};
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/* Table of devices attributes supported by this driver */
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static const struct i7300_dev_info i7300_devs[] = {
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{
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.ctl_name = "I7300",
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.fsb_mapping_errors = PCI_DEVICE_ID_INTEL_I7300_MCH_ERR,
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},
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};
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struct i7300_dimm_info {
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int megabytes; /* size, 0 means not present */
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};
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/* driver private data structure */
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struct i7300_pvt {
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struct pci_dev *pci_dev_16_0_fsb_ctlr; /* 16.0 */
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struct pci_dev *pci_dev_16_1_fsb_addr_map; /* 16.1 */
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struct pci_dev *pci_dev_16_2_fsb_err_regs; /* 16.2 */
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struct pci_dev *pci_dev_2x_0_fbd_branch[MAX_BRANCHES]; /* 21.0 and 22.0 */
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u16 tolm; /* top of low memory */
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u64 ambase; /* AMB BAR */
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u32 mc_settings; /* Report several settings */
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u32 mc_settings_a;
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u16 mir[MAX_MIR]; /* Memory Interleave Reg*/
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u16 mtr[MAX_SLOTS][MAX_BRANCHES]; /* Memory Technlogy Reg */
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u16 ambpresent[MAX_CHANNELS]; /* AMB present regs */
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/* DIMM information matrix, allocating architecture maximums */
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struct i7300_dimm_info dimm_info[MAX_SLOTS][MAX_CHANNELS];
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};
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/* FIXME: Why do we need to have this static? */
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static struct edac_pci_ctl_info *i7300_pci;
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/********************************************
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* i7300 Functions related to error detection
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********************************************/
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struct i7300_error_info {
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int dummy; /* FIXME */
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};
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const char *get_err_from_table(const char *table[], int size, int pos)
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{
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if (pos >= size)
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return "Reserved";
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return table[pos];
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}
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#define GET_ERR_FROM_TABLE(table, pos) \
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get_err_from_table(table, ARRAY_SIZE(table), pos)
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/*
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* i7300_get_error_info Retrieve the hardware error information from
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* the hardware and cache it in the 'info'
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* structure
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*/
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static void i7300_get_error_info(struct mem_ctl_info *mci,
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struct i7300_error_info *info)
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{
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}
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/*
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* i7300_process_error_global Retrieve the hardware error information from
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* the hardware and cache it in the 'info'
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* structure
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*/
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static void i7300_process_error_global(struct mem_ctl_info *mci,
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struct i7300_error_info *info)
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{
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struct i7300_pvt *pvt;
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u32 errnum, value;
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unsigned long errors;
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const char *specific;
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bool is_fatal;
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pvt = mci->pvt_info;
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/* read in the 1st FATAL error register */
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pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
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FERR_GLOBAL_HI, &value);
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if (unlikely(value)) {
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errors = value;
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errnum = find_first_bit(&errors,
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ARRAY_SIZE(ferr_global_hi_name));
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specific = GET_ERR_FROM_TABLE(ferr_global_hi_name, errnum);
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is_fatal = ferr_global_hi_is_fatal(errnum);
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/* Clear the error bit */
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pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
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FERR_GLOBAL_HI, value);
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goto error_global;
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}
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pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
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FERR_GLOBAL_LO, &value);
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if (unlikely(value)) {
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errors = value;
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errnum = find_first_bit(&errors,
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ARRAY_SIZE(ferr_global_lo_name));
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specific = GET_ERR_FROM_TABLE(ferr_global_lo_name, errnum);
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is_fatal = ferr_global_lo_is_fatal(errnum);
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/* Clear the error bit */
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pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
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FERR_GLOBAL_LO, value);
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goto error_global;
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}
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return;
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error_global:
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i7300_mc_printk(mci, KERN_EMERG, "%s misc error: %s\n",
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is_fatal ? "Fatal" : "NOT fatal", specific);
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}
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/*
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* i7300_process_error_info Retrieve the hardware error information from
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* the hardware and cache it in the 'info'
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* structure
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*/
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static void i7300_process_error_info(struct mem_ctl_info *mci,
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struct i7300_error_info *info)
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{
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i7300_process_error_global(mci, info);
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};
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/*
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* i7300_clear_error Retrieve any error from the hardware
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* but do NOT process that error.
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* Used for 'clearing' out of previous errors
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* Called by the Core module.
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*/
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static void i7300_clear_error(struct mem_ctl_info *mci)
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{
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struct i7300_error_info info;
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i7300_get_error_info(mci, &info);
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}
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/*
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* i7300_check_error Retrieve and process errors reported by the
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* hardware. Called by the Core module.
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*/
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static void i7300_check_error(struct mem_ctl_info *mci)
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{
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struct i7300_error_info info;
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debugf4("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__);
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i7300_get_error_info(mci, &info);
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i7300_process_error_info(mci, &info);
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}
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/*
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* i7300_enable_error_reporting
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* Turn on the memory reporting features of the hardware
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*/
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static void i7300_enable_error_reporting(struct mem_ctl_info *mci)
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{
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}
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/************************************************
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* i7300 Functions related to memory enumberation
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************************************************/
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/*
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* determine_mtr(pvt, csrow, channel)
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*
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* return the proper MTR register as determine by the csrow and desired channel
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*/
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static int decode_mtr(struct i7300_pvt *pvt,
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int slot, int ch, int branch,
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struct i7300_dimm_info *dinfo,
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struct csrow_info *p_csrow)
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{
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int mtr, ans, addrBits, channel;
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channel = to_channel(ch, branch);
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mtr = pvt->mtr[slot][branch];
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ans = MTR_DIMMS_PRESENT(mtr) ? 1 : 0;
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debugf2("\tMTR%d CH%d: DIMMs are %s (mtr)\n",
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slot, channel,
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ans ? "Present" : "NOT Present");
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/* Determine if there is a DIMM present in this DIMM slot */
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#if 0
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if (!amb_present || !ans)
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return 0;
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#else
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if (!ans)
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return 0;
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#endif
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/* Start with the number of bits for a Bank
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* on the DRAM */
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addrBits = MTR_DRAM_BANKS_ADDR_BITS;
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/* Add thenumber of ROW bits */
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addrBits += MTR_DIMM_ROWS_ADDR_BITS(mtr);
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/* add the number of COLUMN bits */
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addrBits += MTR_DIMM_COLS_ADDR_BITS(mtr);
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/* add the number of RANK bits */
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addrBits += MTR_DIMM_RANKS(mtr);
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addrBits += 6; /* add 64 bits per DIMM */
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addrBits -= 20; /* divide by 2^^20 */
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addrBits -= 3; /* 8 bits per bytes */
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dinfo->megabytes = 1 << addrBits;
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debugf2("\t\tWIDTH: x%d\n", MTR_DRAM_WIDTH(mtr));
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debugf2("\t\tELECTRICAL THROTTLING is %s\n",
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MTR_DIMMS_ETHROTTLE(mtr) ? "enabled" : "disabled");
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debugf2("\t\tNUMBANK: %d bank(s)\n", MTR_DRAM_BANKS(mtr));
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debugf2("\t\tNUMRANK: %s\n", MTR_DIMM_RANKS(mtr) ? "double" : "single");
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debugf2("\t\tNUMROW: %s\n", numrow_toString[MTR_DIMM_ROWS(mtr)]);
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debugf2("\t\tNUMCOL: %s\n", numcol_toString[MTR_DIMM_COLS(mtr)]);
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debugf2("\t\tSIZE: %d MB\n", dinfo->megabytes);
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p_csrow->grain = 8;
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p_csrow->nr_pages = dinfo->megabytes << 8;
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p_csrow->mtype = MEM_FB_DDR2;
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/*
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* The type of error detection actually depends of the
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* mode of operation. When it is just one single memory chip, at
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* socket 0, channel 0, it uses 8-byte-over-32-byte SECDED+ code.
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* In normal or mirrored mode, it uses Lockstep mode,
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* with the possibility of using an extended algorithm for x8 memories
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* See datasheet Sections 7.3.6 to 7.3.8
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*/
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if (IS_SINGLE_MODE(pvt->mc_settings_a)) {
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p_csrow->edac_mode = EDAC_SECDED;
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debugf0("ECC code is 8-byte-over-32-byte SECDED+ code\n");
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} else {
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debugf0("ECC code is on Lockstep mode\n");
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if (MTR_DRAM_WIDTH(mtr))
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p_csrow->edac_mode = EDAC_S8ECD8ED;
|
|
else
|
|
p_csrow->edac_mode = EDAC_S4ECD4ED;
|
|
}
|
|
|
|
/* ask what device type on this row */
|
|
if (MTR_DRAM_WIDTH(mtr)) {
|
|
debugf0("Scrub algorithm for x8 is on %s mode\n",
|
|
IS_SCRBALGO_ENHANCED(pvt->mc_settings) ?
|
|
"enhanced" : "normal");
|
|
|
|
p_csrow->dtype = DEV_X8;
|
|
} else
|
|
p_csrow->dtype = DEV_X4;
|
|
|
|
return mtr;
|
|
}
|
|
|
|
/*
|
|
* print_dimm_size
|
|
*
|
|
* also will output a DIMM matrix map, if debug is enabled, for viewing
|
|
* how the DIMMs are populated
|
|
*/
|
|
static void print_dimm_size(struct i7300_pvt *pvt)
|
|
{
|
|
struct i7300_dimm_info *dinfo;
|
|
char *p, *mem_buffer;
|
|
int space, n;
|
|
int channel, slot;
|
|
|
|
space = PAGE_SIZE;
|
|
mem_buffer = p = kmalloc(space, GFP_KERNEL);
|
|
if (p == NULL) {
|
|
i7300_printk(KERN_ERR, "MC: %s:%s() kmalloc() failed\n",
|
|
__FILE__, __func__);
|
|
return;
|
|
}
|
|
|
|
n = snprintf(p, space, " ");
|
|
p += n;
|
|
space -= n;
|
|
for (channel = 0; channel < MAX_CHANNELS; channel++) {
|
|
n = snprintf(p, space, "channel %d | ", channel);
|
|
p += n;
|
|
space -= n;
|
|
}
|
|
debugf2("%s\n", mem_buffer);
|
|
p = mem_buffer;
|
|
space = PAGE_SIZE;
|
|
n = snprintf(p, space, "-------------------------------"
|
|
"------------------------------");
|
|
p += n;
|
|
space -= n;
|
|
debugf2("%s\n", mem_buffer);
|
|
p = mem_buffer;
|
|
space = PAGE_SIZE;
|
|
|
|
for (slot = 0; slot < MAX_SLOTS; slot++) {
|
|
n = snprintf(p, space, "csrow/SLOT %d ", slot);
|
|
p += n;
|
|
space -= n;
|
|
|
|
for (channel = 0; channel < MAX_CHANNELS; channel++) {
|
|
dinfo = &pvt->dimm_info[slot][channel];
|
|
n = snprintf(p, space, "%4d MB | ", dinfo->megabytes);
|
|
p += n;
|
|
space -= n;
|
|
}
|
|
|
|
debugf2("%s\n", mem_buffer);
|
|
p = mem_buffer;
|
|
space = PAGE_SIZE;
|
|
}
|
|
|
|
n = snprintf(p, space, "-------------------------------"
|
|
"------------------------------");
|
|
p += n;
|
|
space -= n;
|
|
debugf2("%s\n", mem_buffer);
|
|
p = mem_buffer;
|
|
space = PAGE_SIZE;
|
|
|
|
kfree(mem_buffer);
|
|
}
|
|
|
|
/*
|
|
* i7300_init_csrows Initialize the 'csrows' table within
|
|
* the mci control structure with the
|
|
* addressing of memory.
|
|
*
|
|
* return:
|
|
* 0 success
|
|
* 1 no actual memory found on this MC
|
|
*/
|
|
static int i7300_init_csrows(struct mem_ctl_info *mci)
|
|
{
|
|
struct i7300_pvt *pvt;
|
|
struct i7300_dimm_info *dinfo;
|
|
struct csrow_info *p_csrow;
|
|
int empty;
|
|
int mtr;
|
|
int ch, branch, slot, channel;
|
|
|
|
pvt = mci->pvt_info;
|
|
|
|
empty = 1; /* Assume NO memory */
|
|
|
|
debugf2("Memory Technology Registers:\n");
|
|
|
|
/* Get the AMB present registers for the four channels */
|
|
for (branch = 0; branch < MAX_BRANCHES; branch++) {
|
|
/* Read and dump branch 0's MTRs */
|
|
channel = to_channel(0, branch);
|
|
pci_read_config_word(pvt->pci_dev_2x_0_fbd_branch[branch], AMBPRESENT_0,
|
|
&pvt->ambpresent[channel]);
|
|
debugf2("\t\tAMB-present CH%d = 0x%x:\n",
|
|
channel, pvt->ambpresent[channel]);
|
|
|
|
channel = to_channel(1, branch);
|
|
pci_read_config_word(pvt->pci_dev_2x_0_fbd_branch[branch], AMBPRESENT_1,
|
|
&pvt->ambpresent[channel]);
|
|
debugf2("\t\tAMB-present CH%d = 0x%x:\n",
|
|
channel, pvt->ambpresent[channel]);
|
|
}
|
|
|
|
/* Get the set of MTR[0-7] regs by each branch */
|
|
for (slot = 0; slot < MAX_SLOTS; slot++) {
|
|
int where = mtr_regs[slot];
|
|
for (branch = 0; branch < MAX_BRANCHES; branch++) {
|
|
pci_read_config_word(pvt->pci_dev_2x_0_fbd_branch[branch],
|
|
where,
|
|
&pvt->mtr[slot][branch]);
|
|
for (ch = 0; ch < MAX_BRANCHES; ch++) {
|
|
int channel = to_channel(ch, branch);
|
|
|
|
dinfo = &pvt->dimm_info[slot][channel];
|
|
p_csrow = &mci->csrows[slot];
|
|
|
|
mtr = decode_mtr(pvt, slot, ch, branch,
|
|
dinfo, p_csrow);
|
|
/* if no DIMMS on this row, continue */
|
|
if (!MTR_DIMMS_PRESENT(mtr))
|
|
continue;
|
|
|
|
p_csrow->csrow_idx = slot;
|
|
|
|
/* FAKE OUT VALUES, FIXME */
|
|
p_csrow->first_page = 0 + slot * 20;
|
|
p_csrow->last_page = 9 + slot * 20;
|
|
p_csrow->page_mask = 0xfff;
|
|
|
|
empty = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return empty;
|
|
}
|
|
|
|
static void decode_mir(int mir_no, u16 mir[MAX_MIR])
|
|
{
|
|
if (mir[mir_no] & 3)
|
|
debugf2("MIR%d: limit= 0x%x Branch(es) that participate: %s %s\n",
|
|
mir_no,
|
|
(mir[mir_no] >> 4) & 0xfff,
|
|
(mir[mir_no] & 1) ? "B0" : "",
|
|
(mir[mir_no] & 2) ? "B1": "");
|
|
}
|
|
|
|
/*
|
|
* i7300_get_mc_regs read in the necessary registers and
|
|
* cache locally
|
|
*
|
|
* Fills in the private data members
|
|
*/
|
|
static int i7300_get_mc_regs(struct mem_ctl_info *mci)
|
|
{
|
|
struct i7300_pvt *pvt;
|
|
u32 actual_tolm;
|
|
int i, rc;
|
|
|
|
pvt = mci->pvt_info;
|
|
|
|
pci_read_config_dword(pvt->pci_dev_16_0_fsb_ctlr, AMBASE,
|
|
(u32 *) &pvt->ambase);
|
|
|
|
debugf2("AMBASE= 0x%lx\n", (long unsigned int)pvt->ambase);
|
|
|
|
/* Get the Branch Map regs */
|
|
pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map, TOLM, &pvt->tolm);
|
|
pvt->tolm >>= 12;
|
|
debugf2("TOLM (number of 256M regions) =%u (0x%x)\n", pvt->tolm,
|
|
pvt->tolm);
|
|
|
|
actual_tolm = (u32) ((1000l * pvt->tolm) >> (30 - 28));
|
|
debugf2("Actual TOLM byte addr=%u.%03u GB (0x%x)\n",
|
|
actual_tolm/1000, actual_tolm % 1000, pvt->tolm << 28);
|
|
|
|
/* Get memory controller settings */
|
|
pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map, MC_SETTINGS,
|
|
&pvt->mc_settings);
|
|
pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map, MC_SETTINGS_A,
|
|
&pvt->mc_settings_a);
|
|
|
|
if (IS_SINGLE_MODE(pvt->mc_settings_a))
|
|
debugf0("Memory controller operating on single mode\n");
|
|
else
|
|
debugf0("Memory controller operating on %s mode\n",
|
|
IS_MIRRORED(pvt->mc_settings) ? "mirrored" : "non-mirrored");
|
|
|
|
debugf0("Error detection is %s\n",
|
|
IS_ECC_ENABLED(pvt->mc_settings) ? "enabled" : "disabled");
|
|
debugf0("Retry is %s\n",
|
|
IS_RETRY_ENABLED(pvt->mc_settings) ? "enabled" : "disabled");
|
|
|
|
/* Get Memory Interleave Range registers */
|
|
pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map, MIR0, &pvt->mir[0]);
|
|
pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map, MIR1, &pvt->mir[1]);
|
|
pci_read_config_word(pvt->pci_dev_16_1_fsb_addr_map, MIR2, &pvt->mir[2]);
|
|
|
|
/* Decode the MIR regs */
|
|
for (i = 0; i < MAX_MIR; i++)
|
|
decode_mir(i, pvt->mir);
|
|
|
|
rc = i7300_init_csrows(mci);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* Go and determine the size of each DIMM and place in an
|
|
* orderly matrix */
|
|
print_dimm_size(pvt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*************************************************
|
|
* i7300 Functions related to device probe/release
|
|
*************************************************/
|
|
|
|
/*
|
|
* i7300_put_devices 'put' all the devices that we have
|
|
* reserved via 'get'
|
|
*/
|
|
static void i7300_put_devices(struct mem_ctl_info *mci)
|
|
{
|
|
struct i7300_pvt *pvt;
|
|
int branch;
|
|
|
|
pvt = mci->pvt_info;
|
|
|
|
/* Decrement usage count for devices */
|
|
for (branch = 0; branch < MAX_CH_PER_BRANCH; branch++)
|
|
pci_dev_put(pvt->pci_dev_2x_0_fbd_branch[branch]);
|
|
pci_dev_put(pvt->pci_dev_16_2_fsb_err_regs);
|
|
pci_dev_put(pvt->pci_dev_16_1_fsb_addr_map);
|
|
}
|
|
|
|
/*
|
|
* i7300_get_devices Find and perform 'get' operation on the MCH's
|
|
* device/functions we want to reference for this driver
|
|
*
|
|
* Need to 'get' device 16 func 1 and func 2
|
|
*/
|
|
static int i7300_get_devices(struct mem_ctl_info *mci, int dev_idx)
|
|
{
|
|
struct i7300_pvt *pvt;
|
|
struct pci_dev *pdev;
|
|
|
|
pvt = mci->pvt_info;
|
|
|
|
/* Attempt to 'get' the MCH register we want */
|
|
pdev = NULL;
|
|
while (!pvt->pci_dev_16_1_fsb_addr_map || !pvt->pci_dev_16_2_fsb_err_regs) {
|
|
pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
|
|
PCI_DEVICE_ID_INTEL_I7300_MCH_ERR, pdev);
|
|
if (!pdev) {
|
|
/* End of list, leave */
|
|
i7300_printk(KERN_ERR,
|
|
"'system address,Process Bus' "
|
|
"device not found:"
|
|
"vendor 0x%x device 0x%x ERR funcs "
|
|
"(broken BIOS?)\n",
|
|
PCI_VENDOR_ID_INTEL,
|
|
PCI_DEVICE_ID_INTEL_I7300_MCH_ERR);
|
|
goto error;
|
|
}
|
|
|
|
/* Store device 16 funcs 1 and 2 */
|
|
switch (PCI_FUNC(pdev->devfn)) {
|
|
case 1:
|
|
pvt->pci_dev_16_1_fsb_addr_map = pdev;
|
|
break;
|
|
case 2:
|
|
pvt->pci_dev_16_2_fsb_err_regs = pdev;
|
|
break;
|
|
}
|
|
}
|
|
|
|
debugf1("System Address, processor bus- PCI Bus ID: %s %x:%x\n",
|
|
pci_name(pvt->pci_dev_16_0_fsb_ctlr),
|
|
pvt->pci_dev_16_0_fsb_ctlr->vendor, pvt->pci_dev_16_0_fsb_ctlr->device);
|
|
debugf1("Branchmap, control and errors - PCI Bus ID: %s %x:%x\n",
|
|
pci_name(pvt->pci_dev_16_1_fsb_addr_map),
|
|
pvt->pci_dev_16_1_fsb_addr_map->vendor, pvt->pci_dev_16_1_fsb_addr_map->device);
|
|
debugf1("FSB Error Regs - PCI Bus ID: %s %x:%x\n",
|
|
pci_name(pvt->pci_dev_16_2_fsb_err_regs),
|
|
pvt->pci_dev_16_2_fsb_err_regs->vendor, pvt->pci_dev_16_2_fsb_err_regs->device);
|
|
|
|
pvt->pci_dev_2x_0_fbd_branch[0] = pci_get_device(PCI_VENDOR_ID_INTEL,
|
|
PCI_DEVICE_ID_INTEL_I7300_MCH_FB0,
|
|
NULL);
|
|
if (!pvt->pci_dev_2x_0_fbd_branch[0]) {
|
|
i7300_printk(KERN_ERR,
|
|
"MC: 'BRANCH 0' device not found:"
|
|
"vendor 0x%x device 0x%x Func 0 (broken BIOS?)\n",
|
|
PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_I7300_MCH_FB0);
|
|
goto error;
|
|
}
|
|
|
|
pvt->pci_dev_2x_0_fbd_branch[1] = pci_get_device(PCI_VENDOR_ID_INTEL,
|
|
PCI_DEVICE_ID_INTEL_I7300_MCH_FB1,
|
|
NULL);
|
|
if (!pvt->pci_dev_2x_0_fbd_branch[1]) {
|
|
i7300_printk(KERN_ERR,
|
|
"MC: 'BRANCH 1' device not found:"
|
|
"vendor 0x%x device 0x%x Func 0 "
|
|
"(broken BIOS?)\n",
|
|
PCI_VENDOR_ID_INTEL,
|
|
PCI_DEVICE_ID_INTEL_I7300_MCH_FB1);
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
i7300_put_devices(mci);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* i7300_probe1 Probe for ONE instance of device to see if it is
|
|
* present.
|
|
* return:
|
|
* 0 for FOUND a device
|
|
* < 0 for error code
|
|
*/
|
|
static int i7300_probe1(struct pci_dev *pdev, int dev_idx)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
struct i7300_pvt *pvt;
|
|
int num_channels;
|
|
int num_dimms_per_channel;
|
|
int num_csrows;
|
|
|
|
if (dev_idx >= ARRAY_SIZE(i7300_devs))
|
|
return -EINVAL;
|
|
|
|
debugf0("MC: " __FILE__ ": %s(), pdev bus %u dev=0x%x fn=0x%x\n",
|
|
__func__,
|
|
pdev->bus->number,
|
|
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
|
|
|
|
/* We only are looking for func 0 of the set */
|
|
if (PCI_FUNC(pdev->devfn) != 0)
|
|
return -ENODEV;
|
|
|
|
/* As we don't have a motherboard identification routine to determine
|
|
* actual number of slots/dimms per channel, we thus utilize the
|
|
* resource as specified by the chipset. Thus, we might have
|
|
* have more DIMMs per channel than actually on the mobo, but this
|
|
* allows the driver to support upto the chipset max, without
|
|
* some fancy mobo determination.
|
|
*/
|
|
num_dimms_per_channel = MAX_SLOTS;
|
|
num_channels = MAX_CHANNELS;
|
|
num_csrows = MAX_SLOTS * MAX_CHANNELS;
|
|
|
|
debugf0("MC: %s(): Number of - Channels= %d DIMMS= %d CSROWS= %d\n",
|
|
__func__, num_channels, num_dimms_per_channel, num_csrows);
|
|
|
|
/* allocate a new MC control structure */
|
|
mci = edac_mc_alloc(sizeof(*pvt), num_csrows, num_channels, 0);
|
|
|
|
if (mci == NULL)
|
|
return -ENOMEM;
|
|
|
|
debugf0("MC: " __FILE__ ": %s(): mci = %p\n", __func__, mci);
|
|
|
|
mci->dev = &pdev->dev; /* record ptr to the generic device */
|
|
|
|
pvt = mci->pvt_info;
|
|
pvt->pci_dev_16_0_fsb_ctlr = pdev; /* Record this device in our private */
|
|
|
|
/* 'get' the pci devices we want to reserve for our use */
|
|
if (i7300_get_devices(mci, dev_idx))
|
|
goto fail0;
|
|
|
|
mci->mc_idx = 0;
|
|
mci->mtype_cap = MEM_FLAG_FB_DDR2;
|
|
mci->edac_ctl_cap = EDAC_FLAG_NONE;
|
|
mci->edac_cap = EDAC_FLAG_NONE;
|
|
mci->mod_name = "i7300_edac.c";
|
|
mci->mod_ver = I7300_REVISION;
|
|
mci->ctl_name = i7300_devs[dev_idx].ctl_name;
|
|
mci->dev_name = pci_name(pdev);
|
|
mci->ctl_page_to_phys = NULL;
|
|
|
|
/* Set the function pointer to an actual operation function */
|
|
mci->edac_check = i7300_check_error;
|
|
|
|
/* initialize the MC control structure 'csrows' table
|
|
* with the mapping and control information */
|
|
if (i7300_get_mc_regs(mci)) {
|
|
debugf0("MC: Setting mci->edac_cap to EDAC_FLAG_NONE\n"
|
|
" because i7300_init_csrows() returned nonzero "
|
|
"value\n");
|
|
mci->edac_cap = EDAC_FLAG_NONE; /* no csrows found */
|
|
} else {
|
|
debugf1("MC: Enable error reporting now\n");
|
|
i7300_enable_error_reporting(mci);
|
|
}
|
|
|
|
/* add this new MC control structure to EDAC's list of MCs */
|
|
if (edac_mc_add_mc(mci)) {
|
|
debugf0("MC: " __FILE__
|
|
": %s(): failed edac_mc_add_mc()\n", __func__);
|
|
/* FIXME: perhaps some code should go here that disables error
|
|
* reporting if we just enabled it
|
|
*/
|
|
goto fail1;
|
|
}
|
|
|
|
i7300_clear_error(mci);
|
|
|
|
/* allocating generic PCI control info */
|
|
i7300_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
|
|
if (!i7300_pci) {
|
|
printk(KERN_WARNING
|
|
"%s(): Unable to create PCI control\n",
|
|
__func__);
|
|
printk(KERN_WARNING
|
|
"%s(): PCI error report via EDAC not setup\n",
|
|
__func__);
|
|
}
|
|
|
|
return 0;
|
|
|
|
/* Error exit unwinding stack */
|
|
fail1:
|
|
|
|
i7300_put_devices(mci);
|
|
|
|
fail0:
|
|
edac_mc_free(mci);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* i7300_init_one constructor for one instance of device
|
|
*
|
|
* returns:
|
|
* negative on error
|
|
* count (>= 0)
|
|
*/
|
|
static int __devinit i7300_init_one(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
int rc;
|
|
|
|
debugf0("MC: " __FILE__ ": %s()\n", __func__);
|
|
|
|
/* wake up device */
|
|
rc = pci_enable_device(pdev);
|
|
if (rc == -EIO)
|
|
return rc;
|
|
|
|
/* now probe and enable the device */
|
|
return i7300_probe1(pdev, id->driver_data);
|
|
}
|
|
|
|
/*
|
|
* i7300_remove_one destructor for one instance of device
|
|
*
|
|
*/
|
|
static void __devexit i7300_remove_one(struct pci_dev *pdev)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
|
|
debugf0(__FILE__ ": %s()\n", __func__);
|
|
|
|
if (i7300_pci)
|
|
edac_pci_release_generic_ctl(i7300_pci);
|
|
|
|
mci = edac_mc_del_mc(&pdev->dev);
|
|
if (!mci)
|
|
return;
|
|
|
|
/* retrieve references to resources, and free those resources */
|
|
i7300_put_devices(mci);
|
|
|
|
edac_mc_free(mci);
|
|
}
|
|
|
|
/*
|
|
* pci_device_id table for which devices we are looking for
|
|
*
|
|
* The "E500P" device is the first device supported.
|
|
*/
|
|
static const struct pci_device_id i7300_pci_tbl[] __devinitdata = {
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_I7300_MCH_ERR)},
|
|
{0,} /* 0 terminated list. */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, i7300_pci_tbl);
|
|
|
|
/*
|
|
* i7300_driver pci_driver structure for this module
|
|
*
|
|
*/
|
|
static struct pci_driver i7300_driver = {
|
|
.name = "i7300_edac",
|
|
.probe = i7300_init_one,
|
|
.remove = __devexit_p(i7300_remove_one),
|
|
.id_table = i7300_pci_tbl,
|
|
};
|
|
|
|
/*
|
|
* i7300_init Module entry function
|
|
* Try to initialize this module for its devices
|
|
*/
|
|
static int __init i7300_init(void)
|
|
{
|
|
int pci_rc;
|
|
|
|
debugf2("MC: " __FILE__ ": %s()\n", __func__);
|
|
|
|
/* Ensure that the OPSTATE is set correctly for POLL or NMI */
|
|
opstate_init();
|
|
|
|
pci_rc = pci_register_driver(&i7300_driver);
|
|
|
|
return (pci_rc < 0) ? pci_rc : 0;
|
|
}
|
|
|
|
/*
|
|
* i7300_exit() Module exit function
|
|
* Unregister the driver
|
|
*/
|
|
static void __exit i7300_exit(void)
|
|
{
|
|
debugf2("MC: " __FILE__ ": %s()\n", __func__);
|
|
pci_unregister_driver(&i7300_driver);
|
|
}
|
|
|
|
module_init(i7300_init);
|
|
module_exit(i7300_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
|
|
MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
|
|
MODULE_DESCRIPTION("MC Driver for Intel I7300 memory controllers - "
|
|
I7300_REVISION);
|
|
|
|
module_param(edac_op_state, int, 0444);
|
|
MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
|