| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tim Small | 1228 | 72.62% | 1 | 4.55% |
| Vladislav Bogdanov | 201 | 11.89% | 1 | 4.55% |
| Mauro Carvalho Chehab | 118 | 6.98% | 9 | 40.91% |
| Dave Jiang | 60 | 3.55% | 2 | 9.09% |
| Joe Perches | 44 | 2.60% | 2 | 9.09% |
| Hitoshi Mitake | 23 | 1.36% | 1 | 4.55% |
| Doug Thompson | 9 | 0.53% | 3 | 13.64% |
| Jingoo Han | 6 | 0.35% | 1 | 4.55% |
| Lucas De Marchi | 1 | 0.06% | 1 | 4.55% |
| Roman Fietze | 1 | 0.06% | 1 | 4.55% |
| Total | 1691 | 22 |
/* * Intel 82443BX/GX (440BX/GX chipset) Memory Controller EDAC kernel * module (C) 2006 Tim Small * * This file may be distributed under the terms of the GNU General * Public License. * * Written by Tim Small <tim@buttersideup.com>, based on work by Linux * Networx, Thayne Harbaugh, Dan Hollis <goemon at anime dot net> and * others. * * 440GX fix by Jason Uhlenkott <juhlenko@akamai.com>. * * Written with reference to 82443BX Host Bridge Datasheet: * http://download.intel.com/design/chipsets/datashts/29063301.pdf * references to this document given in []. * * This module doesn't support the 440LX, but it may be possible to * make it do so (the 440LX's register definitions are different, but * not completely so - I haven't studied them in enough detail to know * how easy this would be). */ #include <linux/module.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/edac.h> #include "edac_module.h" #define EDAC_MOD_STR "i82443bxgx_edac" /* The 82443BX supports SDRAM, or EDO (EDO for mobile only), "Memory * Size: 8 MB to 512 MB (1GB with Registered DIMMs) with eight memory * rows" "The 82443BX supports multiple-bit error detection and * single-bit error correction when ECC mode is enabled and * single/multi-bit error detection when correction is disabled. * During writes to the DRAM, the 82443BX generates ECC for the data * on a QWord basis. Partial QWord writes require a read-modify-write * cycle when ECC is enabled." */ /* "Additionally, the 82443BX ensures that the data is corrected in * main memory so that accumulation of errors is prevented. Another * error within the same QWord would result in a double-bit error * which is unrecoverable. This is known as hardware scrubbing since * it requires no software intervention to correct the data in memory." */ /* [Also see page 100 (section 4.3), "DRAM Interface"] * [Also see page 112 (section 4.6.1.4), ECC] */ #define I82443BXGX_NR_CSROWS 8 #define I82443BXGX_NR_CHANS 1 #define I82443BXGX_NR_DIMMS 4 /* 82443 PCI Device 0 */ #define I82443BXGX_NBXCFG 0x50 /* 32bit register starting at this PCI * config space offset */ #define I82443BXGX_NBXCFG_OFFSET_NON_ECCROW 24 /* Array of bits, zero if * row is non-ECC */ #define I82443BXGX_NBXCFG_OFFSET_DRAM_FREQ 12 /* 2 bits,00=100MHz,10=66 MHz */ #define I82443BXGX_NBXCFG_OFFSET_DRAM_INTEGRITY 7 /* 2 bits: */ #define I82443BXGX_NBXCFG_INTEGRITY_NONE 0x0 /* 00 = Non-ECC */ #define I82443BXGX_NBXCFG_INTEGRITY_EC 0x1 /* 01 = EC (only) */ #define I82443BXGX_NBXCFG_INTEGRITY_ECC 0x2 /* 10 = ECC */ #define I82443BXGX_NBXCFG_INTEGRITY_SCRUB 0x3 /* 11 = ECC + HW Scrub */ #define I82443BXGX_NBXCFG_OFFSET_ECC_DIAG_ENABLE 6 /* 82443 PCI Device 0 */ #define I82443BXGX_EAP 0x80 /* 32bit register starting at this PCI * config space offset, Error Address * Pointer Register */ #define I82443BXGX_EAP_OFFSET_EAP 12 /* High 20 bits of error address */ #define I82443BXGX_EAP_OFFSET_MBE BIT(1) /* Err at EAP was multi-bit (W1TC) */ #define I82443BXGX_EAP_OFFSET_SBE BIT(0) /* Err at EAP was single-bit (W1TC) */ #define I82443BXGX_ERRCMD 0x90 /* 8bit register starting at this PCI * config space offset. */ #define I82443BXGX_ERRCMD_OFFSET_SERR_ON_MBE BIT(1) /* 1 = enable */ #define I82443BXGX_ERRCMD_OFFSET_SERR_ON_SBE BIT(0) /* 1 = enable */ #define I82443BXGX_ERRSTS 0x91 /* 16bit register starting at this PCI * config space offset. */ #define I82443BXGX_ERRSTS_OFFSET_MBFRE 5 /* 3 bits - first err row multibit */ #define I82443BXGX_ERRSTS_OFFSET_MEF BIT(4) /* 1 = MBE occurred */ #define I82443BXGX_ERRSTS_OFFSET_SBFRE 1 /* 3 bits - first err row singlebit */ #define I82443BXGX_ERRSTS_OFFSET_SEF BIT(0) /* 1 = SBE occurred */ #define I82443BXGX_DRAMC 0x57 /* 8bit register starting at this PCI * config space offset. */ #define I82443BXGX_DRAMC_OFFSET_DT 3 /* 2 bits, DRAM Type */ #define I82443BXGX_DRAMC_DRAM_IS_EDO 0 /* 00 = EDO */ #define I82443BXGX_DRAMC_DRAM_IS_SDRAM 1 /* 01 = SDRAM */ #define I82443BXGX_DRAMC_DRAM_IS_RSDRAM 2 /* 10 = Registered SDRAM */ #define I82443BXGX_DRB 0x60 /* 8x 8bit registers starting at this PCI * config space offset. */ /* FIXME - don't poll when ECC disabled? */ struct i82443bxgx_edacmc_error_info { u32 eap; }; static struct edac_pci_ctl_info *i82443bxgx_pci; static struct pci_dev *mci_pdev; /* init dev: in case that AGP code has * already registered driver */ static int i82443bxgx_registered = 1; static void i82443bxgx_edacmc_get_error_info(struct mem_ctl_info *mci, struct i82443bxgx_edacmc_error_info *info) { struct pci_dev *pdev; pdev = to_pci_dev(mci->pdev); pci_read_config_dword(pdev, I82443BXGX_EAP, &info->eap); if (info->eap & I82443BXGX_EAP_OFFSET_SBE) /* Clear error to allow next error to be reported [p.61] */ pci_write_bits32(pdev, I82443BXGX_EAP, I82443BXGX_EAP_OFFSET_SBE, I82443BXGX_EAP_OFFSET_SBE); if (info->eap & I82443BXGX_EAP_OFFSET_MBE) /* Clear error to allow next error to be reported [p.61] */ pci_write_bits32(pdev, I82443BXGX_EAP, I82443BXGX_EAP_OFFSET_MBE, I82443BXGX_EAP_OFFSET_MBE); } static int i82443bxgx_edacmc_process_error_info(struct mem_ctl_info *mci, struct i82443bxgx_edacmc_error_info *info, int handle_errors) { int error_found = 0; u32 eapaddr, page, pageoffset; /* bits 30:12 hold the 4kb block in which the error occurred * [p.61] */ eapaddr = (info->eap & 0xfffff000); page = eapaddr >> PAGE_SHIFT; pageoffset = eapaddr - (page << PAGE_SHIFT); if (info->eap & I82443BXGX_EAP_OFFSET_SBE) { error_found = 1; if (handle_errors) edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, page, pageoffset, 0, edac_mc_find_csrow_by_page(mci, page), 0, -1, mci->ctl_name, ""); } if (info->eap & I82443BXGX_EAP_OFFSET_MBE) { error_found = 1; if (handle_errors) edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, page, pageoffset, 0, edac_mc_find_csrow_by_page(mci, page), 0, -1, mci->ctl_name, ""); } return error_found; } static void i82443bxgx_edacmc_check(struct mem_ctl_info *mci) { struct i82443bxgx_edacmc_error_info info; i82443bxgx_edacmc_get_error_info(mci, &info); i82443bxgx_edacmc_process_error_info(mci, &info, 1); } static void i82443bxgx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev, enum edac_type edac_mode, enum mem_type mtype) { struct csrow_info *csrow; struct dimm_info *dimm; int index; u8 drbar, dramc; u32 row_base, row_high_limit, row_high_limit_last; pci_read_config_byte(pdev, I82443BXGX_DRAMC, &dramc); row_high_limit_last = 0; for (index = 0; index < mci->nr_csrows; index++) { csrow = mci->csrows[index]; dimm = csrow->channels[0]->dimm; pci_read_config_byte(pdev, I82443BXGX_DRB + index, &drbar); edac_dbg(1, "MC%d: Row=%d DRB = %#0x\n", mci->mc_idx, index, drbar); row_high_limit = ((u32) drbar << 23); /* find the DRAM Chip Select Base address and mask */ edac_dbg(1, "MC%d: Row=%d, Boundary Address=%#0x, Last = %#0x\n", mci->mc_idx, index, row_high_limit, row_high_limit_last); /* 440GX goes to 2GB, represented with a DRB of 0. */ if (row_high_limit_last && !row_high_limit) row_high_limit = 1UL << 31; /* This row is empty [p.49] */ if (row_high_limit == row_high_limit_last) continue; row_base = row_high_limit_last; csrow->first_page = row_base >> PAGE_SHIFT; csrow->last_page = (row_high_limit >> PAGE_SHIFT) - 1; dimm->nr_pages = csrow->last_page - csrow->first_page + 1; /* EAP reports in 4kilobyte granularity [61] */ dimm->grain = 1 << 12; dimm->mtype = mtype; /* I don't think 440BX can tell you device type? FIXME? */ dimm->dtype = DEV_UNKNOWN; /* Mode is global to all rows on 440BX */ dimm->edac_mode = edac_mode; row_high_limit_last = row_high_limit; } } static int i82443bxgx_edacmc_probe1(struct pci_dev *pdev, int dev_idx) { struct mem_ctl_info *mci; struct edac_mc_layer layers[2]; u8 dramc; u32 nbxcfg, ecc_mode; enum mem_type mtype; enum edac_type edac_mode; edac_dbg(0, "MC:\n"); /* Something is really hosed if PCI config space reads from * the MC aren't working. */ if (pci_read_config_dword(pdev, I82443BXGX_NBXCFG, &nbxcfg)) return -EIO; layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; layers[0].size = I82443BXGX_NR_CSROWS; layers[0].is_virt_csrow = true; layers[1].type = EDAC_MC_LAYER_CHANNEL; layers[1].size = I82443BXGX_NR_CHANS; layers[1].is_virt_csrow = false; mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, 0); if (mci == NULL) return -ENOMEM; edac_dbg(0, "MC: mci = %p\n", mci); mci->pdev = &pdev->dev; mci->mtype_cap = MEM_FLAG_EDO | MEM_FLAG_SDR | MEM_FLAG_RDR; mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED; pci_read_config_byte(pdev, I82443BXGX_DRAMC, &dramc); switch ((dramc >> I82443BXGX_DRAMC_OFFSET_DT) & (BIT(0) | BIT(1))) { case I82443BXGX_DRAMC_DRAM_IS_EDO: mtype = MEM_EDO; break; case I82443BXGX_DRAMC_DRAM_IS_SDRAM: mtype = MEM_SDR; break; case I82443BXGX_DRAMC_DRAM_IS_RSDRAM: mtype = MEM_RDR; break; default: edac_dbg(0, "Unknown/reserved DRAM type value in DRAMC register!\n"); mtype = -MEM_UNKNOWN; } if ((mtype == MEM_SDR) || (mtype == MEM_RDR)) mci->edac_cap = mci->edac_ctl_cap; else mci->edac_cap = EDAC_FLAG_NONE; mci->scrub_cap = SCRUB_FLAG_HW_SRC; pci_read_config_dword(pdev, I82443BXGX_NBXCFG, &nbxcfg); ecc_mode = ((nbxcfg >> I82443BXGX_NBXCFG_OFFSET_DRAM_INTEGRITY) & (BIT(0) | BIT(1))); mci->scrub_mode = (ecc_mode == I82443BXGX_NBXCFG_INTEGRITY_SCRUB) ? SCRUB_HW_SRC : SCRUB_NONE; switch (ecc_mode) { case I82443BXGX_NBXCFG_INTEGRITY_NONE: edac_mode = EDAC_NONE; break; case I82443BXGX_NBXCFG_INTEGRITY_EC: edac_mode = EDAC_EC; break; case I82443BXGX_NBXCFG_INTEGRITY_ECC: case I82443BXGX_NBXCFG_INTEGRITY_SCRUB: edac_mode = EDAC_SECDED; break; default: edac_dbg(0, "Unknown/reserved ECC state in NBXCFG register!\n"); edac_mode = EDAC_UNKNOWN; break; } i82443bxgx_init_csrows(mci, pdev, edac_mode, mtype); /* Many BIOSes don't clear error flags on boot, so do this * here, or we get "phantom" errors occurring at module-load * time. */ pci_write_bits32(pdev, I82443BXGX_EAP, (I82443BXGX_EAP_OFFSET_SBE | I82443BXGX_EAP_OFFSET_MBE), (I82443BXGX_EAP_OFFSET_SBE | I82443BXGX_EAP_OFFSET_MBE)); mci->mod_name = EDAC_MOD_STR; mci->ctl_name = "I82443BXGX"; mci->dev_name = pci_name(pdev); mci->edac_check = i82443bxgx_edacmc_check; mci->ctl_page_to_phys = NULL; if (edac_mc_add_mc(mci)) { edac_dbg(3, "failed edac_mc_add_mc()\n"); goto fail; } /* allocating generic PCI control info */ i82443bxgx_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR); if (!i82443bxgx_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__); } edac_dbg(3, "MC: success\n"); return 0; fail: edac_mc_free(mci); return -ENODEV; } /* returns count (>= 0), or negative on error */ static int i82443bxgx_edacmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { int rc; edac_dbg(0, "MC:\n"); /* don't need to call pci_enable_device() */ rc = i82443bxgx_edacmc_probe1(pdev, ent->driver_data); if (mci_pdev == NULL) mci_pdev = pci_dev_get(pdev); return rc; } static void i82443bxgx_edacmc_remove_one(struct pci_dev *pdev) { struct mem_ctl_info *mci; edac_dbg(0, "\n"); if (i82443bxgx_pci) edac_pci_release_generic_ctl(i82443bxgx_pci); if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL) return; edac_mc_free(mci); } static const struct pci_device_id i82443bxgx_pci_tbl[] = { {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_0)}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_2)}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_0)}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_2)}, {0,} /* 0 terminated list. */ }; MODULE_DEVICE_TABLE(pci, i82443bxgx_pci_tbl); static struct pci_driver i82443bxgx_edacmc_driver = { .name = EDAC_MOD_STR, .probe = i82443bxgx_edacmc_init_one, .remove = i82443bxgx_edacmc_remove_one, .id_table = i82443bxgx_pci_tbl, }; static int __init i82443bxgx_edacmc_init(void) { int pci_rc; /* Ensure that the OPSTATE is set correctly for POLL or NMI */ opstate_init(); pci_rc = pci_register_driver(&i82443bxgx_edacmc_driver); if (pci_rc < 0) goto fail0; if (mci_pdev == NULL) { const struct pci_device_id *id = &i82443bxgx_pci_tbl[0]; int i = 0; i82443bxgx_registered = 0; while (mci_pdev == NULL && id->vendor != 0) { mci_pdev = pci_get_device(id->vendor, id->device, NULL); i++; id = &i82443bxgx_pci_tbl[i]; } if (!mci_pdev) { edac_dbg(0, "i82443bxgx pci_get_device fail\n"); pci_rc = -ENODEV; goto fail1; } pci_rc = i82443bxgx_edacmc_init_one(mci_pdev, i82443bxgx_pci_tbl); if (pci_rc < 0) { edac_dbg(0, "i82443bxgx init fail\n"); pci_rc = -ENODEV; goto fail1; } } return 0; fail1: pci_unregister_driver(&i82443bxgx_edacmc_driver); fail0: pci_dev_put(mci_pdev); return pci_rc; } static void __exit i82443bxgx_edacmc_exit(void) { pci_unregister_driver(&i82443bxgx_edacmc_driver); if (!i82443bxgx_registered) i82443bxgx_edacmc_remove_one(mci_pdev); pci_dev_put(mci_pdev); } module_init(i82443bxgx_edacmc_init); module_exit(i82443bxgx_edacmc_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Tim Small <tim@buttersideup.com> - WPAD"); MODULE_DESCRIPTION("EDAC MC support for Intel 82443BX/GX memory controllers"); module_param(edac_op_state, int, 0444); MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
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