Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Cisco Systems. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 31 | */ |
| 32 | |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 33 | #include <linux/jiffies.h> |
| 34 | #include <linux/timer.h> |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 35 | #include <linux/workqueue.h> |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 36 | |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 37 | #include "mthca_dev.h" |
| 38 | |
| 39 | enum { |
| 40 | MTHCA_CATAS_POLL_INTERVAL = 5 * HZ, |
| 41 | |
| 42 | MTHCA_CATAS_TYPE_INTERNAL = 0, |
| 43 | MTHCA_CATAS_TYPE_UPLINK = 3, |
| 44 | MTHCA_CATAS_TYPE_DDR = 4, |
| 45 | MTHCA_CATAS_TYPE_PARITY = 5, |
| 46 | }; |
| 47 | |
| 48 | static DEFINE_SPINLOCK(catas_lock); |
| 49 | |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 50 | static LIST_HEAD(catas_list); |
| 51 | static struct workqueue_struct *catas_wq; |
| 52 | static struct work_struct catas_work; |
| 53 | |
| 54 | static int catas_reset_disable; |
| 55 | module_param_named(catas_reset_disable, catas_reset_disable, int, 0644); |
| 56 | MODULE_PARM_DESC(catas_reset_disable, "disable reset on catastrophic event if nonzero"); |
| 57 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 58 | static void catas_reset(struct work_struct *work) |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 59 | { |
| 60 | struct mthca_dev *dev, *tmpdev; |
| 61 | LIST_HEAD(tlist); |
| 62 | int ret; |
| 63 | |
| 64 | mutex_lock(&mthca_device_mutex); |
| 65 | |
| 66 | spin_lock_irq(&catas_lock); |
| 67 | list_splice_init(&catas_list, &tlist); |
| 68 | spin_unlock_irq(&catas_lock); |
| 69 | |
| 70 | list_for_each_entry_safe(dev, tmpdev, &tlist, catas_err.list) { |
Jack Morgenstein | d686159 | 2009-09-24 11:55:41 -0700 | [diff] [blame] | 71 | struct pci_dev *pdev = dev->pdev; |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 72 | ret = __mthca_restart_one(dev->pdev); |
Jack Morgenstein | d686159 | 2009-09-24 11:55:41 -0700 | [diff] [blame] | 73 | /* 'dev' now is not valid */ |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 74 | if (ret) |
Jack Morgenstein | d686159 | 2009-09-24 11:55:41 -0700 | [diff] [blame] | 75 | printk(KERN_ERR "mthca %s: Reset failed (%d)\n", |
| 76 | pci_name(pdev), ret); |
| 77 | else { |
| 78 | struct mthca_dev *d = pci_get_drvdata(pdev); |
| 79 | mthca_dbg(d, "Reset succeeded\n"); |
| 80 | } |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | mutex_unlock(&mthca_device_mutex); |
| 84 | } |
| 85 | |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 86 | static void handle_catas(struct mthca_dev *dev) |
| 87 | { |
| 88 | struct ib_event event; |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 89 | unsigned long flags; |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 90 | const char *type; |
| 91 | int i; |
| 92 | |
| 93 | event.device = &dev->ib_dev; |
| 94 | event.event = IB_EVENT_DEVICE_FATAL; |
| 95 | event.element.port_num = 0; |
Jack Morgenstein | d841064 | 2009-09-05 20:36:16 -0700 | [diff] [blame] | 96 | dev->active = false; |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 97 | |
| 98 | ib_dispatch_event(&event); |
| 99 | |
| 100 | switch (swab32(readl(dev->catas_err.map)) >> 24) { |
| 101 | case MTHCA_CATAS_TYPE_INTERNAL: |
| 102 | type = "internal error"; |
| 103 | break; |
| 104 | case MTHCA_CATAS_TYPE_UPLINK: |
| 105 | type = "uplink bus error"; |
| 106 | break; |
| 107 | case MTHCA_CATAS_TYPE_DDR: |
| 108 | type = "DDR data error"; |
| 109 | break; |
| 110 | case MTHCA_CATAS_TYPE_PARITY: |
| 111 | type = "internal parity error"; |
| 112 | break; |
| 113 | default: |
| 114 | type = "unknown error"; |
| 115 | break; |
| 116 | } |
| 117 | |
| 118 | mthca_err(dev, "Catastrophic error detected: %s\n", type); |
| 119 | for (i = 0; i < dev->catas_err.size; ++i) |
| 120 | mthca_err(dev, " buf[%02x]: %08x\n", |
| 121 | i, swab32(readl(dev->catas_err.map + i))); |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 122 | |
| 123 | if (catas_reset_disable) |
| 124 | return; |
| 125 | |
| 126 | spin_lock_irqsave(&catas_lock, flags); |
| 127 | list_add(&dev->catas_err.list, &catas_list); |
| 128 | queue_work(catas_wq, &catas_work); |
| 129 | spin_unlock_irqrestore(&catas_lock, flags); |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | static void poll_catas(unsigned long dev_ptr) |
| 133 | { |
| 134 | struct mthca_dev *dev = (struct mthca_dev *) dev_ptr; |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 135 | int i; |
| 136 | |
| 137 | for (i = 0; i < dev->catas_err.size; ++i) |
| 138 | if (readl(dev->catas_err.map + i)) { |
| 139 | handle_catas(dev); |
| 140 | return; |
| 141 | } |
| 142 | |
Roland Dreier | 4522e08 | 2008-07-14 23:48:52 -0700 | [diff] [blame] | 143 | mod_timer(&dev->catas_err.timer, |
Roland Dreier | c036925 | 2008-07-14 23:48:52 -0700 | [diff] [blame] | 144 | round_jiffies(jiffies + MTHCA_CATAS_POLL_INTERVAL)); |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | void mthca_start_catas_poll(struct mthca_dev *dev) |
| 148 | { |
| 149 | unsigned long addr; |
| 150 | |
| 151 | init_timer(&dev->catas_err.timer); |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 152 | dev->catas_err.map = NULL; |
| 153 | |
| 154 | addr = pci_resource_start(dev->pdev, 0) + |
| 155 | ((pci_resource_len(dev->pdev, 0) - 1) & |
| 156 | dev->catas_err.addr); |
| 157 | |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 158 | dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4); |
| 159 | if (!dev->catas_err.map) { |
| 160 | mthca_warn(dev, "couldn't map catastrophic error region " |
| 161 | "at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4); |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 162 | return; |
| 163 | } |
| 164 | |
| 165 | dev->catas_err.timer.data = (unsigned long) dev; |
| 166 | dev->catas_err.timer.function = poll_catas; |
| 167 | dev->catas_err.timer.expires = jiffies + MTHCA_CATAS_POLL_INTERVAL; |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 168 | INIT_LIST_HEAD(&dev->catas_err.list); |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 169 | add_timer(&dev->catas_err.timer); |
| 170 | } |
| 171 | |
| 172 | void mthca_stop_catas_poll(struct mthca_dev *dev) |
| 173 | { |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 174 | del_timer_sync(&dev->catas_err.timer); |
| 175 | |
Roland Dreier | 208dde2 | 2008-09-29 21:37:33 -0700 | [diff] [blame] | 176 | if (dev->catas_err.map) |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 177 | iounmap(dev->catas_err.map); |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 178 | |
| 179 | spin_lock_irq(&catas_lock); |
| 180 | list_del(&dev->catas_err.list); |
| 181 | spin_unlock_irq(&catas_lock); |
| 182 | } |
| 183 | |
| 184 | int __init mthca_catas_init(void) |
| 185 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 186 | INIT_WORK(&catas_work, catas_reset); |
Jack Morgenstein | b3b30f5 | 2006-08-15 21:11:18 +0300 | [diff] [blame] | 187 | |
| 188 | catas_wq = create_singlethread_workqueue("mthca_catas"); |
| 189 | if (!catas_wq) |
| 190 | return -ENOMEM; |
| 191 | |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | void mthca_catas_cleanup(void) |
| 196 | { |
| 197 | destroy_workqueue(catas_wq); |
Roland Dreier | 3d155f8 | 2005-10-27 11:03:38 -0700 | [diff] [blame] | 198 | } |