| Ralf Baechle | f65aad4 | 2012-10-17 00:39:09 +0200 | [diff] [blame^] | 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) 2009 Wind River Systems, |
| 7 | * written by Ralf Baechle <ralf@linux-mips.org> |
| 8 | */ |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/io.h> |
| 13 | #include <linux/edac.h> |
| 14 | |
| 15 | #include <asm/octeon/cvmx.h> |
| 16 | |
| 17 | #include "edac_core.h" |
| 18 | #include "edac_module.h" |
| 19 | |
| 20 | #define EDAC_MOD_STR "octeon-l2c" |
| 21 | |
| 22 | static void co_l2c_poll(struct edac_device_ctl_info *l2c) |
| 23 | { |
| 24 | union cvmx_l2t_err l2t_err; |
| 25 | |
| 26 | l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR); |
| 27 | if (l2t_err.s.sec_err) { |
| 28 | edac_device_handle_ce(l2c, 0, 0, |
| 29 | "Single bit error (corrected)"); |
| 30 | l2t_err.s.sec_err = 1; /* Reset */ |
| 31 | cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64); |
| 32 | } |
| 33 | if (l2t_err.s.ded_err) { |
| 34 | edac_device_handle_ue(l2c, 0, 0, |
| 35 | "Double bit error (corrected)"); |
| 36 | l2t_err.s.ded_err = 1; /* Reset */ |
| 37 | cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64); |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | static int __devinit co_l2c_probe(struct platform_device *pdev) |
| 42 | { |
| 43 | struct edac_device_ctl_info *l2c; |
| 44 | union cvmx_l2t_err l2t_err; |
| 45 | int res = 0; |
| 46 | |
| 47 | l2c = edac_device_alloc_ctl_info(0, "l2c", 1, NULL, 0, 0, |
| 48 | NULL, 0, edac_device_alloc_index()); |
| 49 | if (!l2c) |
| 50 | return -ENOMEM; |
| 51 | |
| 52 | l2c->dev = &pdev->dev; |
| 53 | platform_set_drvdata(pdev, l2c); |
| 54 | l2c->dev_name = dev_name(&pdev->dev); |
| 55 | |
| 56 | l2c->mod_name = "octeon-l2c"; |
| 57 | l2c->ctl_name = "octeon_l2c_err"; |
| 58 | l2c->edac_check = co_l2c_poll; |
| 59 | |
| 60 | if (edac_device_add_device(l2c) > 0) { |
| 61 | pr_err("%s: edac_device_add_device() failed\n", __func__); |
| 62 | goto err; |
| 63 | } |
| 64 | |
| 65 | l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR); |
| 66 | l2t_err.s.sec_intena = 0; /* We poll */ |
| 67 | l2t_err.s.ded_intena = 0; |
| 68 | l2t_err.s.sec_err = 1; /* Clear, just in case */ |
| 69 | l2t_err.s.ded_err = 1; |
| 70 | cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64); |
| 71 | |
| 72 | return 0; |
| 73 | |
| 74 | err: |
| 75 | edac_device_free_ctl_info(l2c); |
| 76 | |
| 77 | return res; |
| 78 | } |
| 79 | |
| 80 | static int co_l2c_remove(struct platform_device *pdev) |
| 81 | { |
| 82 | struct edac_device_ctl_info *l2c = platform_get_drvdata(pdev); |
| 83 | |
| 84 | edac_device_del_device(&pdev->dev); |
| 85 | edac_device_free_ctl_info(l2c); |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static struct platform_driver co_l2c_driver = { |
| 91 | .probe = co_l2c_probe, |
| 92 | .remove = co_l2c_remove, |
| 93 | .driver = { |
| 94 | .name = "co_l2c_edac", |
| 95 | } |
| 96 | }; |
| 97 | |
| 98 | static int __init co_edac_init(void) |
| 99 | { |
| 100 | int ret; |
| 101 | |
| 102 | ret = platform_driver_register(&co_l2c_driver); |
| 103 | if (ret) |
| 104 | pr_warning(EDAC_MOD_STR " EDAC failed to register\n"); |
| 105 | |
| 106 | return ret; |
| 107 | } |
| 108 | |
| 109 | static void __exit co_edac_exit(void) |
| 110 | { |
| 111 | platform_driver_unregister(&co_l2c_driver); |
| 112 | } |
| 113 | |
| 114 | module_init(co_edac_init); |
| 115 | module_exit(co_edac_exit); |
| 116 | |
| 117 | MODULE_LICENSE("GPL"); |
| 118 | MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>"); |