--- /dev/null
+/*
+ * Copyright 2011 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+/**
+ * @file drv_mshim_intf.h
+ * Interface definitions for the Linux EDAC memory controller driver.
+ */
+
+#ifndef _SYS_HV_INCLUDE_DRV_MSHIM_INTF_H
+#define _SYS_HV_INCLUDE_DRV_MSHIM_INTF_H
+
+/** Number of memory controllers in the public API. */
+#define TILE_MAX_MSHIMS 4
+
+/** Memory info under each memory controller. */
+struct mshim_mem_info
+{
+ uint64_t mem_size; /**< Total memory size in bytes. */
+ uint8_t mem_type; /**< Memory type, DDR2 or DDR3. */
+ uint8_t mem_ecc; /**< Memory supports ECC. */
+};
+
+/**
+ * DIMM error structure.
+ * For now, only correctable errors are counted and the mshim doesn't record
+ * the error PA. HV takes panic upon uncorrectable errors.
+ */
+struct mshim_mem_error
+{
+ uint32_t sbe_count; /**< Number of single-bit errors. */
+};
+
+/** Read this offset to get the memory info per mshim. */
+#define MSHIM_MEM_INFO_OFF 0x100
+
+/** Read this offset to check DIMM error. */
+#define MSHIM_MEM_ERROR_OFF 0x200
+
+#endif /* _SYS_HV_INCLUDE_DRV_MSHIM_INTF_H */
#define HV_ENOTREADY -812 /**< Device not ready */
#define HV_EIO -813 /**< I/O error */
#define HV_ENOMEM -814 /**< Out of memory */
+#define HV_EAGAIN -815 /**< Try again */
#define HV_ERR_MAX -801 /**< Largest HV error code */
-#define HV_ERR_MIN -814 /**< Smallest HV error code */
+#define HV_ERR_MIN -815 /**< Smallest HV error code */
#ifndef __ASSEMBLER__
*/
HV_PhysAddrRange hv_inquire_physical(int idx);
+/** Possible DIMM types. */
+typedef enum
+{
+ NO_DIMM = 0, /**< No DIMM */
+ DDR2 = 1, /**< DDR2 */
+ DDR3 = 2 /**< DDR3 */
+} HV_DIMM_Type;
+
+#ifdef __tilegx__
+
+/** Log2 of minimum DIMM bytes supported by the memory controller. */
+#define HV_MSH_MIN_DIMM_SIZE_SHIFT 29
+
+/** Max number of DIMMs contained by one memory controller. */
+#define HV_MSH_MAX_DIMMS 8
+
+#else
+
+/** Log2 of minimum DIMM bytes supported by the memory controller. */
+#define HV_MSH_MIN_DIMM_SIZE_SHIFT 26
+
+/** Max number of DIMMs contained by one memory controller. */
+#define HV_MSH_MAX_DIMMS 2
+
+#endif
+
+/** Number of bits to right-shift to get the DIMM type. */
+#define HV_DIMM_TYPE_SHIFT 0
+
+/** Bits to mask to get the DIMM type. */
+#define HV_DIMM_TYPE_MASK 0xf
+
+/** Number of bits to right-shift to get the DIMM size. */
+#define HV_DIMM_SIZE_SHIFT 4
+
+/** Bits to mask to get the DIMM size. */
+#define HV_DIMM_SIZE_MASK 0xf
/** Memory controller information. */
typedef struct
* downcall:
*
* INT_MESSAGE_RCV_DWNCL (hypervisor message available)
+ * INT_DEV_INTR_DWNCL (device interrupt)
* INT_DMATLB_MISS_DWNCL (DMA TLB miss)
* INT_SNITLB_MISS_DWNCL (SNI TLB miss)
* INT_DMATLB_ACCESS_DWNCL (DMA TLB access violation)
--- /dev/null
+/*
+ * Copyright 2011 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ * Tilera-specific EDAC driver.
+ *
+ * This source code is derived from the following driver:
+ *
+ * Cell MIC driver for ECC counting
+ *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ * <benh@kernel.crashing.org>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/edac.h>
+#include <hv/hypervisor.h>
+#include <hv/drv_mshim_intf.h>
+
+#include "edac_core.h"
+
+#define DRV_NAME "tile-edac"
+
+/* Number of cs_rows needed per memory controller on TILEPro. */
+#define TILE_EDAC_NR_CSROWS 1
+
+/* Number of channels per memory controller on TILEPro. */
+#define TILE_EDAC_NR_CHANS 1
+
+/* Granularity of reported error in bytes on TILEPro. */
+#define TILE_EDAC_ERROR_GRAIN 8
+
+/* TILE processor has multiple independent memory controllers. */
+struct platform_device *mshim_pdev[TILE_MAX_MSHIMS];
+
+struct tile_edac_priv {
+ int hv_devhdl; /* Hypervisor device handle. */
+ int node; /* Memory controller instance #. */
+ unsigned int ce_count; /*
+ * Correctable-error counter
+ * kept by the driver.
+ */
+};
+
+static void tile_edac_check(struct mem_ctl_info *mci)
+{
+ struct tile_edac_priv *priv = mci->pvt_info;
+ struct mshim_mem_error mem_error;
+
+ if (hv_dev_pread(priv->hv_devhdl, 0, (HV_VirtAddr)&mem_error,
+ sizeof(struct mshim_mem_error), MSHIM_MEM_ERROR_OFF) !=
+ sizeof(struct mshim_mem_error)) {
+ pr_err(DRV_NAME ": MSHIM_MEM_ERROR_OFF pread failure.\n");
+ return;
+ }
+
+ /* Check if the current error count is different from the saved one. */
+ if (mem_error.sbe_count != priv->ce_count) {
+ dev_dbg(mci->dev, "ECC CE err on node %d\n", priv->node);
+ priv->ce_count = mem_error.sbe_count;
+ edac_mc_handle_ce(mci, 0, 0, 0, 0, 0, mci->ctl_name);
+ }
+}
+
+/*
+ * Initialize the 'csrows' table within the mci control structure with the
+ * addressing of memory.
+ */
+static int __devinit tile_edac_init_csrows(struct mem_ctl_info *mci)
+{
+ struct csrow_info *csrow = &mci->csrows[0];
+ struct tile_edac_priv *priv = mci->pvt_info;
+ struct mshim_mem_info mem_info;
+
+ if (hv_dev_pread(priv->hv_devhdl, 0, (HV_VirtAddr)&mem_info,
+ sizeof(struct mshim_mem_info), MSHIM_MEM_INFO_OFF) !=
+ sizeof(struct mshim_mem_info)) {
+ pr_err(DRV_NAME ": MSHIM_MEM_INFO_OFF pread failure.\n");
+ return -1;
+ }
+
+ if (mem_info.mem_ecc)
+ csrow->edac_mode = EDAC_SECDED;
+ else
+ csrow->edac_mode = EDAC_NONE;
+ switch (mem_info.mem_type) {
+ case DDR2:
+ csrow->mtype = MEM_DDR2;
+ break;
+
+ case DDR3:
+ csrow->mtype = MEM_DDR3;
+ break;
+
+ default:
+ return -1;
+ }
+
+ csrow->first_page = 0;
+ csrow->nr_pages = mem_info.mem_size >> PAGE_SHIFT;
+ csrow->last_page = csrow->first_page + csrow->nr_pages - 1;
+ csrow->grain = TILE_EDAC_ERROR_GRAIN;
+ csrow->dtype = DEV_UNKNOWN;
+
+ return 0;
+}
+
+static int __devinit tile_edac_mc_probe(struct platform_device *pdev)
+{
+ char hv_file[32];
+ int hv_devhdl;
+ struct mem_ctl_info *mci;
+ struct tile_edac_priv *priv;
+ int rc;
+
+ sprintf(hv_file, "mshim/%d", pdev->id);
+ hv_devhdl = hv_dev_open((HV_VirtAddr)hv_file, 0);
+ if (hv_devhdl < 0)
+ return -EINVAL;
+
+ /* A TILE MC has a single channel and one chip-select row. */
+ mci = edac_mc_alloc(sizeof(struct tile_edac_priv),
+ TILE_EDAC_NR_CSROWS, TILE_EDAC_NR_CHANS, pdev->id);
+ if (mci == NULL)
+ return -ENOMEM;
+ priv = mci->pvt_info;
+ priv->node = pdev->id;
+ priv->hv_devhdl = hv_devhdl;
+
+ mci->dev = &pdev->dev;
+ mci->mtype_cap = MEM_FLAG_DDR2;
+ mci->edac_ctl_cap = EDAC_FLAG_SECDED;
+
+ mci->mod_name = DRV_NAME;
+ mci->ctl_name = "TILEPro_Memory_Controller";
+ mci->dev_name = dev_name(&pdev->dev);
+ mci->edac_check = tile_edac_check;
+
+ /*
+ * Initialize the MC control structure 'csrows' table
+ * with the mapping and control information.
+ */
+ if (tile_edac_init_csrows(mci)) {
+ /* No csrows found. */
+ mci->edac_cap = EDAC_FLAG_NONE;
+ } else {
+ mci->edac_cap = EDAC_FLAG_SECDED;
+ }
+
+ platform_set_drvdata(pdev, mci);
+
+ /* Register with EDAC core */
+ rc = edac_mc_add_mc(mci);
+ if (rc) {
+ dev_err(&pdev->dev, "failed to register with EDAC core\n");
+ edac_mc_free(mci);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int __devexit tile_edac_mc_remove(struct platform_device *pdev)
+{
+ struct mem_ctl_info *mci = platform_get_drvdata(pdev);
+
+ edac_mc_del_mc(&pdev->dev);
+ if (mci)
+ edac_mc_free(mci);
+ return 0;
+}
+
+static struct platform_driver tile_edac_mc_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = tile_edac_mc_probe,
+ .remove = __devexit_p(tile_edac_mc_remove),
+};
+
+/*
+ * Driver init routine.
+ */
+static int __init tile_edac_init(void)
+{
+ char hv_file[32];
+ struct platform_device *pdev;
+ int i, err, num = 0;
+
+ /* Only support POLL mode. */
+ edac_op_state = EDAC_OPSTATE_POLL;
+
+ err = platform_driver_register(&tile_edac_mc_driver);
+ if (err)
+ return err;
+
+ for (i = 0; i < TILE_MAX_MSHIMS; i++) {
+ /*
+ * Not all memory controllers are configured such as in the
+ * case of a simulator. So we register only those mshims
+ * that are configured by the hypervisor.
+ */
+ sprintf(hv_file, "mshim/%d", i);
+ if (hv_dev_open((HV_VirtAddr)hv_file, 0) < 0)
+ continue;
+
+ pdev = platform_device_register_simple(DRV_NAME, i, NULL, 0);
+ if (IS_ERR(pdev))
+ continue;
+ mshim_pdev[i] = pdev;
+ num++;
+ }
+
+ if (num == 0) {
+ platform_driver_unregister(&tile_edac_mc_driver);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+/*
+ * Driver cleanup routine.
+ */
+static void __exit tile_edac_exit(void)
+{
+ int i;
+
+ for (i = 0; i < TILE_MAX_MSHIMS; i++) {
+ struct platform_device *pdev = mshim_pdev[i];
+ if (!pdev)
+ continue;
+
+ platform_set_drvdata(pdev, NULL);
+ platform_device_unregister(pdev);
+ }
+ platform_driver_unregister(&tile_edac_mc_driver);
+}
+
+module_init(tile_edac_init);
+module_exit(tile_edac_exit);
git.openpandora.org / pandora-kernel.git / commitdiff