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_module.h" 22 23 static void octeon_pci_poll(struct edac_pci_ctl_info *pci) 24 { 25 union cvmx_pci_cfg01 cfg01; 26 27 cfg01.u32 = octeon_npi_read32(CVMX_NPI_PCI_CFG01); 28 if (cfg01.s.dpe) { /* Detected parity error */ 29 edac_pci_handle_pe(pci, pci->ctl_name); 30 cfg01.s.dpe = 1; /* Reset */ 31 octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32); 32 } 33 if (cfg01.s.sse) { 34 edac_pci_handle_npe(pci, "Signaled System Error"); 35 cfg01.s.sse = 1; /* Reset */ 36 octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32); 37 } 38 if (cfg01.s.rma) { 39 edac_pci_handle_npe(pci, "Received Master Abort"); 40 cfg01.s.rma = 1; /* Reset */ 41 octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32); 42 } 43 if (cfg01.s.rta) { 44 edac_pci_handle_npe(pci, "Received Target Abort"); 45 cfg01.s.rta = 1; /* Reset */ 46 octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32); 47 } 48 if (cfg01.s.sta) { 49 edac_pci_handle_npe(pci, "Signaled Target Abort"); 50 cfg01.s.sta = 1; /* Reset */ 51 octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32); 52 } 53 if (cfg01.s.mdpe) { 54 edac_pci_handle_npe(pci, "Master Data Parity Error"); 55 cfg01.s.mdpe = 1; /* Reset */ 56 octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32); 57 } 58 } 59 60 static int octeon_pci_probe(struct platform_device *pdev) 61 { 62 struct edac_pci_ctl_info *pci; 63 int res = 0; 64 65 pci = edac_pci_alloc_ctl_info(0, "octeon_pci_err"); 66 if (!pci) 67 return -ENOMEM; 68 69 pci->dev = &pdev->dev; 70 platform_set_drvdata(pdev, pci); 71 pci->dev_name = dev_name(&pdev->dev); 72 73 pci->mod_name = "octeon-pci"; 74 pci->ctl_name = "octeon_pci_err"; 75 pci->edac_check = octeon_pci_poll; 76 77 if (edac_pci_add_device(pci, 0) > 0) { 78 pr_err("%s: edac_pci_add_device() failed\n", __func__); 79 goto err; 80 } 81 82 return 0; 83 84 err: 85 edac_pci_free_ctl_info(pci); 86 87 return res; 88 } 89 90 static int octeon_pci_remove(struct platform_device *pdev) 91 { 92 struct edac_pci_ctl_info *pci = platform_get_drvdata(pdev); 93 94 edac_pci_del_device(&pdev->dev); 95 edac_pci_free_ctl_info(pci); 96 97 return 0; 98 } 99 100 static struct platform_driver octeon_pci_driver = { 101 .probe = octeon_pci_probe, 102 .remove = octeon_pci_remove, 103 .driver = { 104 .name = "octeon_pci_edac", 105 } 106 }; 107 module_platform_driver(octeon_pci_driver); 108 109 MODULE_LICENSE("GPL"); 110 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>"); 111