[PATCH] EDAC: drivers for AMD 76x and Intel E750x, E752x

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 558 insertions, 0 deletions

diff --git a/drivers/edac/e7xxx_edac.c b/drivers/edac/e7xxx_edac.c
new file mode 100644
index 000000000000..066be43f5ece
--- /dev/null
+++ b/drivers/edac/e7xxx_edac.c
@@ -0,0 +1,558 @@
+/*
+ * Intel e7xxx 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.
+ *
+ * See "enum e7xxx_chips" below for supported chipsets
+ *
+ * Written by Thayne Harbaugh
+ * Based on work by Dan Hollis <goemon at anime dot net> and others.
+ *	http://www.anime.net/~goemon/linux-ecc/
+ *
+ * Contributors:
+ * 	Eric Biederman (Linux Networx)
+ * 	Tom Zimmerman (Linux Networx)
+ * 	Jim Garlick (Lawrence Livermore National Labs)
+ *	Dave Peterson (Lawrence Livermore National Labs)
+ *	That One Guy (Some other place)
+ *	Wang Zhenyu (intel.com)
+ *
+ * $Id: edac_e7xxx.c,v 1.5.2.9 2005/10/05 00:43:44 dsp_llnl Exp $
+ *
+ */
+
+
+#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_7205_0
+#define PCI_DEVICE_ID_INTEL_7205_0	0x255d
+#endif				/* PCI_DEVICE_ID_INTEL_7205_0 */
+
+#ifndef PCI_DEVICE_ID_INTEL_7205_1_ERR
+#define PCI_DEVICE_ID_INTEL_7205_1_ERR	0x2551
+#endif				/* PCI_DEVICE_ID_INTEL_7205_1_ERR */
+
+#ifndef PCI_DEVICE_ID_INTEL_7500_0
+#define PCI_DEVICE_ID_INTEL_7500_0	0x2540
+#endif				/* PCI_DEVICE_ID_INTEL_7500_0 */
+
+#ifndef PCI_DEVICE_ID_INTEL_7500_1_ERR
+#define PCI_DEVICE_ID_INTEL_7500_1_ERR	0x2541
+#endif				/* PCI_DEVICE_ID_INTEL_7500_1_ERR */
+
+#ifndef PCI_DEVICE_ID_INTEL_7501_0
+#define PCI_DEVICE_ID_INTEL_7501_0	0x254c
+#endif				/* PCI_DEVICE_ID_INTEL_7501_0 */
+
+#ifndef PCI_DEVICE_ID_INTEL_7501_1_ERR
+#define PCI_DEVICE_ID_INTEL_7501_1_ERR	0x2541
+#endif				/* PCI_DEVICE_ID_INTEL_7501_1_ERR */
+
+#ifndef PCI_DEVICE_ID_INTEL_7505_0
+#define PCI_DEVICE_ID_INTEL_7505_0	0x2550
+#endif				/* PCI_DEVICE_ID_INTEL_7505_0 */
+
+#ifndef PCI_DEVICE_ID_INTEL_7505_1_ERR
+#define PCI_DEVICE_ID_INTEL_7505_1_ERR	0x2551
+#endif				/* PCI_DEVICE_ID_INTEL_7505_1_ERR */
+
+
+#define E7XXX_NR_CSROWS		8	/* number of csrows */
+#define E7XXX_NR_DIMMS		8	/* FIXME - is this correct? */
+
+
+/* E7XXX register addresses - device 0 function 0 */
+#define E7XXX_DRB		0x60	/* DRAM row boundary register (8b) */
+#define E7XXX_DRA		0x70	/* DRAM row attribute register (8b) */
+					/*
+					 * 31   Device width row 7 0=x8 1=x4
+					 * 27   Device width row 6
+					 * 23   Device width row 5
+					 * 19   Device width row 4
+					 * 15   Device width row 3
+					 * 11   Device width row 2
+					 *  7   Device width row 1
+					 *  3   Device width row 0
+					 */
+#define E7XXX_DRC		0x7C	/* DRAM controller mode reg (32b) */
+					/*
+					 * 22    Number channels 0=1,1=2
+					 * 19:18 DRB Granularity 32/64MB
+					 */
+#define E7XXX_TOLM		0xC4	/* DRAM top of low memory reg (16b) */
+#define E7XXX_REMAPBASE		0xC6	/* DRAM remap base address reg (16b) */
+#define E7XXX_REMAPLIMIT	0xC8	/* DRAM remap limit address reg (16b) */
+
+/* E7XXX register addresses - device 0 function 1 */
+#define E7XXX_DRAM_FERR		0x80	/* DRAM first error register (8b) */
+#define E7XXX_DRAM_NERR		0x82	/* DRAM next error register (8b) */
+#define E7XXX_DRAM_CELOG_ADD	0xA0	/* DRAM first correctable memory */
+					/*     error address register (32b) */
+					/*
+					 * 31:28 Reserved
+					 * 27:6  CE address (4k block 33:12)
+					 *  5:0  Reserved
+					 */
+#define E7XXX_DRAM_UELOG_ADD	0xB0	/* DRAM first uncorrectable memory */
+					/*     error address register (32b) */
+					/*
+					 * 31:28 Reserved
+					 * 27:6  CE address (4k block 33:12)
+					 *  5:0  Reserved
+					 */
+#define E7XXX_DRAM_CELOG_SYNDROME 0xD0	/* DRAM first correctable memory */
+					/*     error syndrome register (16b) */
+
+enum e7xxx_chips {
+	E7500 = 0,
+	E7501,
+	E7505,
+	E7205,
+};
+
+
+struct e7xxx_pvt {
+	struct pci_dev *bridge_ck;
+	u32 tolm;
+	u32 remapbase;
+	u32 remaplimit;
+	const struct e7xxx_dev_info *dev_info;
+};
+
+
+struct e7xxx_dev_info {
+	u16 err_dev;
+	const char *ctl_name;
+};
+
+
+struct e7xxx_error_info {
+	u8 dram_ferr;
+	u8 dram_nerr;
+	u32 dram_celog_add;
+	u16 dram_celog_syndrome;
+	u32 dram_uelog_add;
+};
+
+static const struct e7xxx_dev_info e7xxx_devs[] = {
+	[E7500] = {
+		   .err_dev = PCI_DEVICE_ID_INTEL_7500_1_ERR,
+		   .ctl_name = "E7500"},
+	[E7501] = {
+		   .err_dev = PCI_DEVICE_ID_INTEL_7501_1_ERR,
+		   .ctl_name = "E7501"},
+	[E7505] = {
+		   .err_dev = PCI_DEVICE_ID_INTEL_7505_1_ERR,
+		   .ctl_name = "E7505"},
+	[E7205] = {
+		   .err_dev = PCI_DEVICE_ID_INTEL_7205_1_ERR,
+		   .ctl_name = "E7205"},
+};
+
+
+/* FIXME - is this valid for both SECDED and S4ECD4ED? */
+static inline int e7xxx_find_channel(u16 syndrome)
+{
+	debugf3("MC: " __FILE__ ": %s()\n", __func__);
+
+	if ((syndrome & 0xff00) == 0)
+		return 0;
+	if ((syndrome & 0x00ff) == 0)
+		return 1;
+	if ((syndrome & 0xf000) == 0 || (syndrome & 0x0f00) == 0)
+		return 0;
+	return 1;
+}
+
+
+static unsigned long
+ctl_page_to_phys(struct mem_ctl_info *mci, unsigned long page)
+{
+	u32 remap;
+	struct e7xxx_pvt *pvt = (struct e7xxx_pvt *) mci->pvt_info;
+
+	debugf3("MC: " __FILE__ ": %s()\n", __func__);
+
+	if ((page < pvt->tolm) ||
+	    ((page >= 0x100000) && (page < pvt->remapbase)))
+		return page;
+	remap = (page - pvt->tolm) + pvt->remapbase;
+	if (remap < pvt->remaplimit)
+		return remap;
+	printk(KERN_ERR "Invalid page %lx - out of range\n", page);
+	return pvt->tolm - 1;
+}
+
+
+static void process_ce(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
+{
+	u32 error_1b, page;
+	u16 syndrome;
+	int row;
+	int channel;
+
+	debugf3("MC: " __FILE__ ": %s()\n", __func__);
+
+	/* read the error address */
+	error_1b = info->dram_celog_add;
+	/* FIXME - should use PAGE_SHIFT */
+	page = error_1b >> 6;	/* convert the address to 4k page */
+	/* read the syndrome */
+	syndrome = info->dram_celog_syndrome;
+	/* FIXME - check for -1 */
+	row = edac_mc_find_csrow_by_page(mci, page);
+	/* convert syndrome to channel */
+	channel = e7xxx_find_channel(syndrome);
+	edac_mc_handle_ce(mci, page, 0, syndrome, row, channel,
+			       "e7xxx CE");
+}
+
+
+static void process_ce_no_info(struct mem_ctl_info *mci)
+{
+	debugf3("MC: " __FILE__ ": %s()\n", __func__);
+	edac_mc_handle_ce_no_info(mci, "e7xxx CE log register overflow");
+}
+
+
+static void process_ue(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
+{
+	u32 error_2b, block_page;
+	int row;
+
+	debugf3("MC: " __FILE__ ": %s()\n", __func__);
+
+	/* read the error address */
+	error_2b = info->dram_uelog_add;
+	/* FIXME - should use PAGE_SHIFT */
+	block_page = error_2b >> 6;	/* convert to 4k address */
+	row = edac_mc_find_csrow_by_page(mci, block_page);
+	edac_mc_handle_ue(mci, block_page, 0, row, "e7xxx UE");
+}
+
+
+static void process_ue_no_info(struct mem_ctl_info *mci)
+{
+	debugf3("MC: " __FILE__ ": %s()\n", __func__);
+	edac_mc_handle_ue_no_info(mci, "e7xxx UE log register overflow");
+}
+
+
+static void e7xxx_get_error_info (struct mem_ctl_info *mci,
+		struct e7xxx_error_info *info)
+{
+	struct e7xxx_pvt *pvt;
+
+	pvt = (struct e7xxx_pvt *) mci->pvt_info;
+	pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_FERR,
+	    &info->dram_ferr);
+	pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_NERR,
+	    &info->dram_nerr);
+
+	if ((info->dram_ferr & 1) || (info->dram_nerr & 1)) {
+		pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_CELOG_ADD,
+		    &info->dram_celog_add);
+		pci_read_config_word(pvt->bridge_ck,
+		    E7XXX_DRAM_CELOG_SYNDROME, &info->dram_celog_syndrome);
+	}
+
+	if ((info->dram_ferr & 2) || (info->dram_nerr & 2))
+		pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_UELOG_ADD,
+		    &info->dram_uelog_add);
+
+	if (info->dram_ferr & 3)
+		pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_FERR, 0x03,
+		    0x03);
+
+	if (info->dram_nerr & 3)
+		pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_NERR, 0x03,
+		    0x03);
+}
+
+
+static int e7xxx_process_error_info (struct mem_ctl_info *mci,
+		struct e7xxx_error_info *info, int handle_errors)
+{
+	int error_found;
+
+	error_found = 0;
+
+	/* decode and report errors */
+	if (info->dram_ferr & 1) {	/* check first error correctable */
+		error_found = 1;
+
+		if (handle_errors)
+			process_ce(mci, info);
+	}
+
+	if (info->dram_ferr & 2) {	/* check first error uncorrectable */
+		error_found = 1;
+
+		if (handle_errors)
+			process_ue(mci, info);
+	}
+
+	if (info->dram_nerr & 1) {	/* check next error correctable */
+		error_found = 1;
+
+		if (handle_errors) {
+			if (info->dram_ferr & 1)
+				process_ce_no_info(mci);
+			else
+				process_ce(mci, info);
+		}
+	}
+
+	if (info->dram_nerr & 2) {	/* check next error uncorrectable */
+		error_found = 1;
+
+		if (handle_errors) {
+			if (info->dram_ferr & 2)
+				process_ue_no_info(mci);
+			else
+				process_ue(mci, info);
+		}
+	}
+
+	return error_found;
+}
+
+
+static void e7xxx_check(struct mem_ctl_info *mci)
+{
+	struct e7xxx_error_info info;
+
+	debugf3("MC: " __FILE__ ": %s()\n", __func__);
+	e7xxx_get_error_info(mci, &info);
+	e7xxx_process_error_info(mci, &info, 1);
+}
+
+
+static int e7xxx_probe1(struct pci_dev *pdev, int dev_idx)
+{
+	int rc = -ENODEV;
+	int index;
+	u16 pci_data;
+	struct mem_ctl_info *mci = NULL;
+	struct e7xxx_pvt *pvt = NULL;
+	u32 drc;
+	int drc_chan = 1;	/* Number of channels 0=1chan,1=2chan */
+	int drc_drbg = 1;	/* DRB granularity 0=32mb,1=64mb */
+	int drc_ddim;		/* DRAM Data Integrity Mode 0=none,2=edac */
+	u32 dra;
+	unsigned long last_cumul_size;
+
+
+	debugf0("MC: " __FILE__ ": %s(): mci\n", __func__);
+
+	/* need to find out the number of channels */
+	pci_read_config_dword(pdev, E7XXX_DRC, &drc);
+	/* only e7501 can be single channel */
+	if (dev_idx == E7501) {
+		drc_chan = ((drc >> 22) & 0x1);
+		drc_drbg = (drc >> 18) & 0x3;
+	}
+	drc_ddim = (drc >> 20) & 0x3;
+
+	mci = edac_mc_alloc(sizeof(*pvt), E7XXX_NR_CSROWS, drc_chan + 1);
+
+	if (mci == NULL) {
+		rc = -ENOMEM;
+		goto fail;
+	}
+
+	debugf3("MC: " __FILE__ ": %s(): init mci\n", __func__);
+
+	mci->mtype_cap = MEM_FLAG_RDDR;
+	mci->edac_ctl_cap =
+	    EDAC_FLAG_NONE | EDAC_FLAG_SECDED | EDAC_FLAG_S4ECD4ED;
+	/* FIXME - what if different memory types are in different csrows? */
+	mci->mod_name = BS_MOD_STR;
+	mci->mod_ver = "$Revision: 1.5.2.9 $";
+	mci->pdev = pdev;
+
+	debugf3("MC: " __FILE__ ": %s(): init pvt\n", __func__);
+	pvt = (struct e7xxx_pvt *) mci->pvt_info;
+	pvt->dev_info = &e7xxx_devs[dev_idx];
+	pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL,
+					 pvt->dev_info->err_dev,
+					 pvt->bridge_ck);
+	if (!pvt->bridge_ck) {
+		printk(KERN_ERR
+		       "MC: error reporting device not found:"
+		       "vendor %x device 0x%x (broken BIOS?)\n",
+		       PCI_VENDOR_ID_INTEL, e7xxx_devs[dev_idx].err_dev);
+		goto fail;
+	}
+
+	debugf3("MC: " __FILE__ ": %s(): more mci init\n", __func__);
+	mci->ctl_name = pvt->dev_info->ctl_name;
+
+	mci->edac_check = e7xxx_check;
+	mci->ctl_page_to_phys = ctl_page_to_phys;
+
+	/* find out the device types */
+	pci_read_config_dword(pdev, E7XXX_DRA, &dra);
+
+	/*
+	 * 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;
+		/* mem_dev 0=x8, 1=x4 */
+		int mem_dev = (dra >> (index * 4 + 3)) & 0x1;
+		struct csrow_info *csrow = &mci->csrows[index];
+
+		pci_read_config_byte(mci->pdev, E7XXX_DRB + index, &value);
+		/* convert a 64 or 32 MiB DRB to a page size. */
+		cumul_size = value << (25 + drc_drbg - 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;	/* 4KiB - resolution of CELOG */
+		csrow->mtype = MEM_RDDR;	/* only one type supported */
+		csrow->dtype = mem_dev ? DEV_X4 : DEV_X8;
+
+		/*
+		 * if single channel or x8 devices then SECDED
+		 * if dual channel and x4 then S4ECD4ED
+		 */
+		if (drc_ddim) {
+			if (drc_chan && mem_dev) {
+				csrow->edac_mode = EDAC_S4ECD4ED;
+				mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
+			} else {
+				csrow->edac_mode = EDAC_SECDED;
+				mci->edac_cap |= EDAC_FLAG_SECDED;
+			}
+		} else
+			csrow->edac_mode = EDAC_NONE;
+	}
+
+	mci->edac_cap |= EDAC_FLAG_NONE;
+
+	debugf3("MC: " __FILE__ ": %s(): tolm, remapbase, remaplimit\n",
+		__func__);
+	/* load the top of low memory, remap base, and remap limit vars */
+	pci_read_config_word(mci->pdev, E7XXX_TOLM, &pci_data);
+	pvt->tolm = ((u32) pci_data) << 4;
+	pci_read_config_word(mci->pdev, E7XXX_REMAPBASE, &pci_data);
+	pvt->remapbase = ((u32) pci_data) << 14;
+	pci_read_config_word(mci->pdev, E7XXX_REMAPLIMIT, &pci_data);
+	pvt->remaplimit = ((u32) pci_data) << 14;
+	printk("tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm,
+	       pvt->remapbase, pvt->remaplimit);
+
+	/* clear any pending errors, or initial state bits */
+	pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_FERR, 0x03, 0x03);
+	pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_NERR, 0x03, 0x03);
+
+	if (edac_mc_add_mc(mci) != 0) {
+		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 != NULL) {
+		if(pvt != NULL && pvt->bridge_ck)
+			pci_dev_put(pvt->bridge_ck);
+		edac_mc_free(mci);
+	}
+
+	return rc;
+}
+
+/* returns count (>= 0), or negative on error */
+static int __devinit
+e7xxx_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+	/* wake up and enable device */
+	return pci_enable_device(pdev) ?
+	    -EIO : e7xxx_probe1(pdev, ent->driver_data);
+}
+
+
+static void __devexit e7xxx_remove_one(struct pci_dev *pdev)
+{
+	struct mem_ctl_info *mci;
+	struct e7xxx_pvt *pvt;
+
+	debugf0(__FILE__ ": %s()\n", __func__);
+
+	if (((mci = edac_mc_find_mci_by_pdev(pdev)) != 0) &&
+	    edac_mc_del_mc(mci)) {
+		pvt = (struct e7xxx_pvt *) mci->pvt_info;
+		pci_dev_put(pvt->bridge_ck);
+		edac_mc_free(mci);
+	}
+}
+
+
+static const struct pci_device_id e7xxx_pci_tbl[] __devinitdata = {
+	{PCI_VEND_DEV(INTEL, 7205_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	 E7205},
+	{PCI_VEND_DEV(INTEL, 7500_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	 E7500},
+	{PCI_VEND_DEV(INTEL, 7501_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	 E7501},
+	{PCI_VEND_DEV(INTEL, 7505_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	 E7505},
+	{0,}			/* 0 terminated list. */
+};
+
+MODULE_DEVICE_TABLE(pci, e7xxx_pci_tbl);
+
+
+static struct pci_driver e7xxx_driver = {
+	.name = BS_MOD_STR,
+	.probe = e7xxx_init_one,
+	.remove = __devexit_p(e7xxx_remove_one),
+	.id_table = e7xxx_pci_tbl,
+};
+
+
+int __init e7xxx_init(void)
+{
+	return pci_register_driver(&e7xxx_driver);
+}
+
+
+static void __exit e7xxx_exit(void)
+{
+	pci_unregister_driver(&e7xxx_driver);
+}
+
+module_init(e7xxx_init);
+module_exit(e7xxx_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n"
+	      "Based on.work by Dan Hollis et al");
+MODULE_DESCRIPTION("MC support for Intel e7xxx memory controllers");