linux/drivers/edac/octeon_edac-pci.c
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   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 2012 Cavium, Inc.
   7 * Copyright (C) 2009 Wind River Systems,
   8 *   written by Ralf Baechle <ralf@linux-mips.org>
   9 */
  10#include <linux/module.h>
  11#include <linux/init.h>
  12#include <linux/slab.h>
  13#include <linux/io.h>
  14#include <linux/edac.h>
  15
  16#include <asm/octeon/cvmx.h>
  17#include <asm/octeon/cvmx-npi-defs.h>
  18#include <asm/octeon/cvmx-pci-defs.h>
  19#include <asm/octeon/octeon.h>
  20
  21#include "edac_core.h"
  22#include "edac_module.h"
  23
  24static void octeon_pci_poll(struct edac_pci_ctl_info *pci)
  25{
  26        union cvmx_pci_cfg01 cfg01;
  27
  28        cfg01.u32 = octeon_npi_read32(CVMX_NPI_PCI_CFG01);
  29        if (cfg01.s.dpe) {              /* Detected parity error */
  30                edac_pci_handle_pe(pci, pci->ctl_name);
  31                cfg01.s.dpe = 1;                /* Reset  */
  32                octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
  33        }
  34        if (cfg01.s.sse) {
  35                edac_pci_handle_npe(pci, "Signaled System Error");
  36                cfg01.s.sse = 1;                /* Reset */
  37                octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
  38        }
  39        if (cfg01.s.rma) {
  40                edac_pci_handle_npe(pci, "Received Master Abort");
  41                cfg01.s.rma = 1;                /* Reset */
  42                octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
  43        }
  44        if (cfg01.s.rta) {
  45                edac_pci_handle_npe(pci, "Received Target Abort");
  46                cfg01.s.rta = 1;                /* Reset */
  47                octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
  48        }
  49        if (cfg01.s.sta) {
  50                edac_pci_handle_npe(pci, "Signaled Target Abort");
  51                cfg01.s.sta = 1;                /* Reset */
  52                octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
  53        }
  54        if (cfg01.s.mdpe) {
  55                edac_pci_handle_npe(pci, "Master Data Parity Error");
  56                cfg01.s.mdpe = 1;               /* Reset */
  57                octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
  58        }
  59}
  60
  61static int octeon_pci_probe(struct platform_device *pdev)
  62{
  63        struct edac_pci_ctl_info *pci;
  64        int res = 0;
  65
  66        pci = edac_pci_alloc_ctl_info(0, "octeon_pci_err");
  67        if (!pci)
  68                return -ENOMEM;
  69
  70        pci->dev = &pdev->dev;
  71        platform_set_drvdata(pdev, pci);
  72        pci->dev_name = dev_name(&pdev->dev);
  73
  74        pci->mod_name = "octeon-pci";
  75        pci->ctl_name = "octeon_pci_err";
  76        pci->edac_check = octeon_pci_poll;
  77
  78        if (edac_pci_add_device(pci, 0) > 0) {
  79                pr_err("%s: edac_pci_add_device() failed\n", __func__);
  80                goto err;
  81        }
  82
  83        return 0;
  84
  85err:
  86        edac_pci_free_ctl_info(pci);
  87
  88        return res;
  89}
  90
  91static int octeon_pci_remove(struct platform_device *pdev)
  92{
  93        struct edac_pci_ctl_info *pci = platform_get_drvdata(pdev);
  94
  95        edac_pci_del_device(&pdev->dev);
  96        edac_pci_free_ctl_info(pci);
  97
  98        return 0;
  99}
 100
 101static struct platform_driver octeon_pci_driver = {
 102        .probe = octeon_pci_probe,
 103        .remove = octeon_pci_remove,
 104        .driver = {
 105                   .name = "octeon_pci_edac",
 106        }
 107};
 108module_platform_driver(octeon_pci_driver);
 109
 110MODULE_LICENSE("GPL");
 111MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
 112
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