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Diffstat (limited to 'drivers/edac/i82875p_edac.c')
-rw-r--r--drivers/edac/i82875p_edac.c532
1 files changed, 532 insertions, 0 deletions
diff --git a/drivers/edac/i82875p_edac.c b/drivers/edac/i82875p_edac.c
new file mode 100644
index 00000000000..009c08fe5d6
--- /dev/null
+++ b/drivers/edac/i82875p_edac.c
@@ -0,0 +1,532 @@
+/*
+ * Intel D82875P Memory Controller kernel module
+ * (C) 2003 Linux Networx (http://lnxi.com)
+ * This file may be distributed under the terms of the
+ * GNU General Public License.
+ *
+ * Written by Thayne Harbaugh
+ * Contributors:
+ * Wang Zhenyu at intel.com
+ *
+ * $Id: edac_i82875p.c,v 1.5.2.11 2005/10/05 00:43:44 dsp_llnl Exp $
+ *
+ * Note: E7210 appears same as D82875P - zhenyu.z.wang at intel.com
+ */
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+
+#include <linux/slab.h>
+
+#include "edac_mc.h"
+
+
+#ifndef PCI_DEVICE_ID_INTEL_82875_0
+#define PCI_DEVICE_ID_INTEL_82875_0 0x2578
+#endif /* PCI_DEVICE_ID_INTEL_82875_0 */
+
+#ifndef PCI_DEVICE_ID_INTEL_82875_6
+#define PCI_DEVICE_ID_INTEL_82875_6 0x257e
+#endif /* PCI_DEVICE_ID_INTEL_82875_6 */
+
+
+/* four csrows in dual channel, eight in single channel */
+#define I82875P_NR_CSROWS(nr_chans) (8/(nr_chans))
+
+
+/* Intel 82875p register addresses - device 0 function 0 - DRAM Controller */
+#define I82875P_EAP 0x58 /* Error Address Pointer (32b)
+ *
+ * 31:12 block address
+ * 11:0 reserved
+ */
+
+#define I82875P_DERRSYN 0x5c /* DRAM Error Syndrome (8b)
+ *
+ * 7:0 DRAM ECC Syndrome
+ */
+
+#define I82875P_DES 0x5d /* DRAM Error Status (8b)
+ *
+ * 7:1 reserved
+ * 0 Error channel 0/1
+ */
+
+#define I82875P_ERRSTS 0xc8 /* Error Status Register (16b)
+ *
+ * 15:10 reserved
+ * 9 non-DRAM lock error (ndlock)
+ * 8 Sftwr Generated SMI
+ * 7 ECC UE
+ * 6 reserved
+ * 5 MCH detects unimplemented cycle
+ * 4 AGP access outside GA
+ * 3 Invalid AGP access
+ * 2 Invalid GA translation table
+ * 1 Unsupported AGP command
+ * 0 ECC CE
+ */
+
+#define I82875P_ERRCMD 0xca /* Error Command (16b)
+ *
+ * 15:10 reserved
+ * 9 SERR on non-DRAM lock
+ * 8 SERR on ECC UE
+ * 7 SERR on ECC CE
+ * 6 target abort on high exception
+ * 5 detect unimplemented cyc
+ * 4 AGP access outside of GA
+ * 3 SERR on invalid AGP access
+ * 2 invalid translation table
+ * 1 SERR on unsupported AGP command
+ * 0 reserved
+ */
+
+
+/* Intel 82875p register addresses - device 6 function 0 - DRAM Controller */
+#define I82875P_PCICMD6 0x04 /* PCI Command Register (16b)
+ *
+ * 15:10 reserved
+ * 9 fast back-to-back - ro 0
+ * 8 SERR enable - ro 0
+ * 7 addr/data stepping - ro 0
+ * 6 parity err enable - ro 0
+ * 5 VGA palette snoop - ro 0
+ * 4 mem wr & invalidate - ro 0
+ * 3 special cycle - ro 0
+ * 2 bus master - ro 0
+ * 1 mem access dev6 - 0(dis),1(en)
+ * 0 IO access dev3 - 0(dis),1(en)
+ */
+
+#define I82875P_BAR6 0x10 /* Mem Delays Base ADDR Reg (32b)
+ *
+ * 31:12 mem base addr [31:12]
+ * 11:4 address mask - ro 0
+ * 3 prefetchable - ro 0(non),1(pre)
+ * 2:1 mem type - ro 0
+ * 0 mem space - ro 0
+ */
+
+/* Intel 82875p MMIO register space - device 0 function 0 - MMR space */
+
+#define I82875P_DRB_SHIFT 26 /* 64MiB grain */
+#define I82875P_DRB 0x00 /* DRAM Row Boundary (8b x 8)
+ *
+ * 7 reserved
+ * 6:0 64MiB row boundary addr
+ */
+
+#define I82875P_DRA 0x10 /* DRAM Row Attribute (4b x 8)
+ *
+ * 7 reserved
+ * 6:4 row attr row 1
+ * 3 reserved
+ * 2:0 row attr row 0
+ *
+ * 000 = 4KiB
+ * 001 = 8KiB
+ * 010 = 16KiB
+ * 011 = 32KiB
+ */
+
+#define I82875P_DRC 0x68 /* DRAM Controller Mode (32b)
+ *
+ * 31:30 reserved
+ * 29 init complete
+ * 28:23 reserved
+ * 22:21 nr chan 00=1,01=2
+ * 20 reserved
+ * 19:18 Data Integ Mode 00=none,01=ecc
+ * 17:11 reserved
+ * 10:8 refresh mode
+ * 7 reserved
+ * 6:4 mode select
+ * 3:2 reserved
+ * 1:0 DRAM type 01=DDR
+ */
+
+
+enum i82875p_chips {
+ I82875P = 0,
+};
+
+
+struct i82875p_pvt {
+ struct pci_dev *ovrfl_pdev;
+ void *ovrfl_window;
+};
+
+
+struct i82875p_dev_info {
+ const char *ctl_name;
+};
+
+
+struct i82875p_error_info {
+ u16 errsts;
+ u32 eap;
+ u8 des;
+ u8 derrsyn;
+ u16 errsts2;
+};
+
+
+static const struct i82875p_dev_info i82875p_devs[] = {
+ [I82875P] = {
+ .ctl_name = "i82875p"},
+};
+
+static struct pci_dev *mci_pdev = NULL; /* init dev: in case that AGP code
+ has already registered driver */
+static int i82875p_registered = 1;
+
+static void i82875p_get_error_info (struct mem_ctl_info *mci,
+ struct i82875p_error_info *info)
+{
+ /*
+ * This is a mess because there is no atomic way to read all the
+ * registers at once and the registers can transition from CE being
+ * overwritten by UE.
+ */
+ pci_read_config_word(mci->pdev, I82875P_ERRSTS, &info->errsts);
+ pci_read_config_dword(mci->pdev, I82875P_EAP, &info->eap);
+ pci_read_config_byte(mci->pdev, I82875P_DES, &info->des);
+ pci_read_config_byte(mci->pdev, I82875P_DERRSYN, &info->derrsyn);
+ pci_read_config_word(mci->pdev, I82875P_ERRSTS, &info->errsts2);
+
+ pci_write_bits16(mci->pdev, I82875P_ERRSTS, 0x0081, 0x0081);
+
+ /*
+ * If the error is the same then we can for both reads then
+ * the first set of reads is valid. If there is a change then
+ * there is a CE no info and the second set of reads is valid
+ * and should be UE info.
+ */
+ if (!(info->errsts2 & 0x0081))
+ return;
+ if ((info->errsts ^ info->errsts2) & 0x0081) {
+ pci_read_config_dword(mci->pdev, I82875P_EAP, &info->eap);
+ pci_read_config_byte(mci->pdev, I82875P_DES, &info->des);
+ pci_read_config_byte(mci->pdev, I82875P_DERRSYN,
+ &info->derrsyn);
+ }
+}
+
+static int i82875p_process_error_info (struct mem_ctl_info *mci,
+ struct i82875p_error_info *info, int handle_errors)
+{
+ int row, multi_chan;
+
+ multi_chan = mci->csrows[0].nr_channels - 1;
+
+ if (!(info->errsts2 & 0x0081))
+ return 0;
+
+ if (!handle_errors)
+ return 1;
+
+ if ((info->errsts ^ info->errsts2) & 0x0081) {
+ edac_mc_handle_ce_no_info(mci, "UE overwrote CE");
+ info->errsts = info->errsts2;
+ }
+
+ info->eap >>= PAGE_SHIFT;
+ row = edac_mc_find_csrow_by_page(mci, info->eap);
+
+ if (info->errsts & 0x0080)
+ edac_mc_handle_ue(mci, info->eap, 0, row, "i82875p UE");
+ else
+ edac_mc_handle_ce(mci, info->eap, 0, info->derrsyn, row,
+ multi_chan ? (info->des & 0x1) : 0,
+ "i82875p CE");
+
+ return 1;
+}
+
+
+static void i82875p_check(struct mem_ctl_info *mci)
+{
+ struct i82875p_error_info info;
+
+ debugf1("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__);
+ i82875p_get_error_info(mci, &info);
+ i82875p_process_error_info(mci, &info, 1);
+}
+
+
+#ifdef CONFIG_PROC_FS
+extern int pci_proc_attach_device(struct pci_dev *);
+#endif
+
+static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
+{
+ int rc = -ENODEV;
+ int index;
+ struct mem_ctl_info *mci = NULL;
+ struct i82875p_pvt *pvt = NULL;
+ unsigned long last_cumul_size;
+ struct pci_dev *ovrfl_pdev;
+ void __iomem *ovrfl_window = NULL;
+
+ u32 drc;
+ u32 drc_chan; /* Number of channels 0=1chan,1=2chan */
+ u32 nr_chans;
+ u32 drc_ddim; /* DRAM Data Integrity Mode 0=none,2=edac */
+
+ debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+ ovrfl_pdev = pci_find_device(PCI_VEND_DEV(INTEL, 82875_6), NULL);
+
+ if (!ovrfl_pdev) {
+ /*
+ * Intel tells BIOS developers to hide device 6 which
+ * configures the overflow device access containing
+ * the DRBs - this is where we expose device 6.
+ * http://www.x86-secret.com/articles/tweak/pat/patsecrets-2.htm
+ */
+ pci_write_bits8(pdev, 0xf4, 0x2, 0x2);
+ ovrfl_pdev =
+ pci_scan_single_device(pdev->bus, PCI_DEVFN(6, 0));
+ if (!ovrfl_pdev)
+ goto fail;
+ }
+#ifdef CONFIG_PROC_FS
+ if (!ovrfl_pdev->procent && pci_proc_attach_device(ovrfl_pdev)) {
+ printk(KERN_ERR "MC: " __FILE__
+ ": %s(): Failed to attach overflow device\n",
+ __func__);
+ goto fail;
+ }
+#endif /* CONFIG_PROC_FS */
+ if (pci_enable_device(ovrfl_pdev)) {
+ printk(KERN_ERR "MC: " __FILE__
+ ": %s(): Failed to enable overflow device\n",
+ __func__);
+ goto fail;
+ }
+
+ if (pci_request_regions(ovrfl_pdev, pci_name(ovrfl_pdev))) {
+#ifdef CORRECT_BIOS
+ goto fail;
+#endif
+ }
+ /* cache is irrelevant for PCI bus reads/writes */
+ ovrfl_window = ioremap_nocache(pci_resource_start(ovrfl_pdev, 0),
+ pci_resource_len(ovrfl_pdev, 0));
+
+ if (!ovrfl_window) {
+ printk(KERN_ERR "MC: " __FILE__
+ ": %s(): Failed to ioremap bar6\n", __func__);
+ goto fail;
+ }
+
+ /* need to find out the number of channels */
+ drc = readl(ovrfl_window + I82875P_DRC);
+ drc_chan = ((drc >> 21) & 0x1);
+ nr_chans = drc_chan + 1;
+ drc_ddim = (drc >> 18) & 0x1;
+
+ mci = edac_mc_alloc(sizeof(*pvt), I82875P_NR_CSROWS(nr_chans),
+ nr_chans);
+
+ if (!mci) {
+ rc = -ENOMEM;
+ goto fail;
+ }
+
+ debugf3("MC: " __FILE__ ": %s(): init mci\n", __func__);
+
+ mci->pdev = pdev;
+ mci->mtype_cap = MEM_FLAG_DDR;
+
+ mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
+ mci->edac_cap = EDAC_FLAG_UNKNOWN;
+ /* adjust FLAGS */
+
+ mci->mod_name = BS_MOD_STR;
+ mci->mod_ver = "$Revision: 1.5.2.11 $";
+ mci->ctl_name = i82875p_devs[dev_idx].ctl_name;
+ mci->edac_check = i82875p_check;
+ mci->ctl_page_to_phys = NULL;
+
+ debugf3("MC: " __FILE__ ": %s(): init pvt\n", __func__);
+
+ pvt = (struct i82875p_pvt *) mci->pvt_info;
+ pvt->ovrfl_pdev = ovrfl_pdev;
+ pvt->ovrfl_window = ovrfl_window;
+
+ /*
+ * The dram row boundary (DRB) reg values are boundary address
+ * for each DRAM row with a granularity of 32 or 64MB (single/dual
+ * channel operation). DRB regs are cumulative; therefore DRB7 will
+ * contain the total memory contained in all eight rows.
+ */
+ for (last_cumul_size = index = 0; index < mci->nr_csrows; index++) {
+ u8 value;
+ u32 cumul_size;
+ struct csrow_info *csrow = &mci->csrows[index];
+
+ value = readb(ovrfl_window + I82875P_DRB + index);
+ cumul_size = value << (I82875P_DRB_SHIFT - PAGE_SHIFT);
+ debugf3("MC: " __FILE__ ": %s(): (%d) cumul_size 0x%x\n",
+ __func__, index, cumul_size);
+ if (cumul_size == last_cumul_size)
+ continue; /* not populated */
+
+ csrow->first_page = last_cumul_size;
+ csrow->last_page = cumul_size - 1;
+ csrow->nr_pages = cumul_size - last_cumul_size;
+ last_cumul_size = cumul_size;
+ csrow->grain = 1 << 12; /* I82875P_EAP has 4KiB reolution */
+ csrow->mtype = MEM_DDR;
+ csrow->dtype = DEV_UNKNOWN;
+ csrow->edac_mode = drc_ddim ? EDAC_SECDED : EDAC_NONE;
+ }
+
+ /* clear counters */
+ pci_write_bits16(mci->pdev, I82875P_ERRSTS, 0x0081, 0x0081);
+
+ if (edac_mc_add_mc(mci)) {
+ debugf3("MC: " __FILE__
+ ": %s(): failed edac_mc_add_mc()\n", __func__);
+ goto fail;
+ }
+
+ /* get this far and it's successful */
+ debugf3("MC: " __FILE__ ": %s(): success\n", __func__);
+ return 0;
+
+ fail:
+ if (mci)
+ edac_mc_free(mci);
+
+ if (ovrfl_window)
+ iounmap(ovrfl_window);
+
+ if (ovrfl_pdev) {
+ pci_release_regions(ovrfl_pdev);
+ pci_disable_device(ovrfl_pdev);
+ }
+
+ /* NOTE: the ovrfl proc entry and pci_dev are intentionally left */
+ return rc;
+}
+
+
+/* returns count (>= 0), or negative on error */
+static int __devinit i82875p_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int rc;
+
+ debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+ printk(KERN_INFO "i82875p init one\n");
+ if(pci_enable_device(pdev) < 0)
+ return -EIO;
+ rc = i82875p_probe1(pdev, ent->driver_data);
+ if (mci_pdev == NULL)
+ mci_pdev = pci_dev_get(pdev);
+ return rc;
+}
+
+
+static void __devexit i82875p_remove_one(struct pci_dev *pdev)
+{
+ struct mem_ctl_info *mci;
+ struct i82875p_pvt *pvt = NULL;
+
+ debugf0(__FILE__ ": %s()\n", __func__);
+
+ if ((mci = edac_mc_find_mci_by_pdev(pdev)) == NULL)
+ return;
+
+ pvt = (struct i82875p_pvt *) mci->pvt_info;
+ if (pvt->ovrfl_window)
+ iounmap(pvt->ovrfl_window);
+
+ if (pvt->ovrfl_pdev) {
+#ifdef CORRECT_BIOS
+ pci_release_regions(pvt->ovrfl_pdev);
+#endif /*CORRECT_BIOS */
+ pci_disable_device(pvt->ovrfl_pdev);
+ pci_dev_put(pvt->ovrfl_pdev);
+ }
+
+ if (edac_mc_del_mc(mci))
+ return;
+
+ edac_mc_free(mci);
+}
+
+
+static const struct pci_device_id i82875p_pci_tbl[] __devinitdata = {
+ {PCI_VEND_DEV(INTEL, 82875_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ I82875P},
+ {0,} /* 0 terminated list. */
+};
+
+MODULE_DEVICE_TABLE(pci, i82875p_pci_tbl);
+
+
+static struct pci_driver i82875p_driver = {
+ .name = BS_MOD_STR,
+ .probe = i82875p_init_one,
+ .remove = __devexit_p(i82875p_remove_one),
+ .id_table = i82875p_pci_tbl,
+};
+
+
+static int __init i82875p_init(void)
+{
+ int pci_rc;
+
+ debugf3("MC: " __FILE__ ": %s()\n", __func__);
+ pci_rc = pci_register_driver(&i82875p_driver);
+ if (pci_rc < 0)
+ return pci_rc;
+ if (mci_pdev == NULL) {
+ i82875p_registered = 0;
+ mci_pdev =
+ pci_get_device(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_82875_0, NULL);
+ if (!mci_pdev) {
+ debugf0("875p pci_get_device fail\n");
+ return -ENODEV;
+ }
+ pci_rc = i82875p_init_one(mci_pdev, i82875p_pci_tbl);
+ if (pci_rc < 0) {
+ debugf0("875p init fail\n");
+ pci_dev_put(mci_pdev);
+ return -ENODEV;
+ }
+ }
+ return 0;
+}
+
+
+static void __exit i82875p_exit(void)
+{
+ debugf3("MC: " __FILE__ ": %s()\n", __func__);
+
+ pci_unregister_driver(&i82875p_driver);
+ if (!i82875p_registered) {
+ i82875p_remove_one(mci_pdev);
+ pci_dev_put(mci_pdev);
+ }
+}
+
+
+module_init(i82875p_init);
+module_exit(i82875p_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh");
+MODULE_DESCRIPTION("MC support for Intel 82875 memory hub controllers");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-15 18:36:09 +0000