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. 31 */ 32 33 #include <linux/jiffies.h> 34 #include <linux/module.h> 35 #include <linux/timer.h> 36 #include <linux/workqueue.h> 37 38 #include "mthca_dev.h" 39 40 enum { 41 MTHCA_CATAS_POLL_INTERVAL = 5 * HZ, 42 43 MTHCA_CATAS_TYPE_INTERNAL = 0, 44 MTHCA_CATAS_TYPE_UPLINK = 3, 45 MTHCA_CATAS_TYPE_DDR = 4, 46 MTHCA_CATAS_TYPE_PARITY = 5, 47 }; 48 49 static DEFINE_SPINLOCK(catas_lock); 50 51 static LIST_HEAD(catas_list); 52 static struct workqueue_struct *catas_wq; 53 static struct work_struct catas_work; 54 55 static int catas_reset_disable; 56 module_param_named(catas_reset_disable, catas_reset_disable, int, 0644); 57 MODULE_PARM_DESC(catas_reset_disable, "disable reset on catastrophic event if nonzero"); 58 59 static void catas_reset(struct work_struct *work) 60 { 61 struct mthca_dev *dev, *tmpdev; 62 LIST_HEAD(tlist); 63 int ret; 64 65 mutex_lock(&mthca_device_mutex); 66 67 spin_lock_irq(&catas_lock); 68 list_splice_init(&catas_list, &tlist); 69 spin_unlock_irq(&catas_lock); 70 71 list_for_each_entry_safe(dev, tmpdev, &tlist, catas_err.list) { 72 struct pci_dev *pdev = dev->pdev; 73 ret = __mthca_restart_one(dev->pdev); 74 /* 'dev' now is not valid */ 75 if (ret) 76 printk(KERN_ERR "mthca %s: Reset failed (%d)\n", 77 pci_name(pdev), ret); 78 else { 79 struct mthca_dev *d = pci_get_drvdata(pdev); 80 mthca_dbg(d, "Reset succeeded\n"); 81 } 82 } 83 84 mutex_unlock(&mthca_device_mutex); 85 } 86 87 static void handle_catas(struct mthca_dev *dev) 88 { 89 struct ib_event event; 90 unsigned long flags; 91 const char *type; 92 int i; 93 94 event.device = &dev->ib_dev; 95 event.event = IB_EVENT_DEVICE_FATAL; 96 event.element.port_num = 0; 97 dev->active = false; 98 99 ib_dispatch_event(&event); 100 101 switch (swab32(readl(dev->catas_err.map)) >> 24) { 102 case MTHCA_CATAS_TYPE_INTERNAL: 103 type = "internal error"; 104 break; 105 case MTHCA_CATAS_TYPE_UPLINK: 106 type = "uplink bus error"; 107 break; 108 case MTHCA_CATAS_TYPE_DDR: 109 type = "DDR data error"; 110 break; 111 case MTHCA_CATAS_TYPE_PARITY: 112 type = "internal parity error"; 113 break; 114 default: 115 type = "unknown error"; 116 break; 117 } 118 119 mthca_err(dev, "Catastrophic error detected: %s\n", type); 120 for (i = 0; i < dev->catas_err.size; ++i) 121 mthca_err(dev, " buf[%02x]: %08x\n", 122 i, swab32(readl(dev->catas_err.map + i))); 123 124 if (catas_reset_disable) 125 return; 126 127 spin_lock_irqsave(&catas_lock, flags); 128 list_add(&dev->catas_err.list, &catas_list); 129 queue_work(catas_wq, &catas_work); 130 spin_unlock_irqrestore(&catas_lock, flags); 131 } 132 133 static void poll_catas(unsigned long dev_ptr) 134 { 135 struct mthca_dev *dev = (struct mthca_dev *) dev_ptr; 136 int i; 137 138 for (i = 0; i < dev->catas_err.size; ++i) 139 if (readl(dev->catas_err.map + i)) { 140 handle_catas(dev); 141 return; 142 } 143 144 mod_timer(&dev->catas_err.timer, 145 round_jiffies(jiffies + MTHCA_CATAS_POLL_INTERVAL)); 146 } 147 148 void mthca_start_catas_poll(struct mthca_dev *dev) 149 { 150 phys_addr_t addr; 151 152 init_timer(&dev->catas_err.timer); 153 dev->catas_err.map = NULL; 154 155 addr = pci_resource_start(dev->pdev, 0) + 156 ((pci_resource_len(dev->pdev, 0) - 1) & 157 dev->catas_err.addr); 158 159 dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4); 160 if (!dev->catas_err.map) { 161 mthca_warn(dev, "couldn't map catastrophic error region " 162 "at 0x%llx/0x%x\n", (unsigned long long) addr, 163 dev->catas_err.size * 4); 164 return; 165 } 166 167 dev->catas_err.timer.data = (unsigned long) dev; 168 dev->catas_err.timer.function = poll_catas; 169 dev->catas_err.timer.expires = jiffies + MTHCA_CATAS_POLL_INTERVAL; 170 INIT_LIST_HEAD(&dev->catas_err.list); 171 add_timer(&dev->catas_err.timer); 172 } 173 174 void mthca_stop_catas_poll(struct mthca_dev *dev) 175 { 176 del_timer_sync(&dev->catas_err.timer); 177 178 if (dev->catas_err.map) 179 iounmap(dev->catas_err.map); 180 181 spin_lock_irq(&catas_lock); 182 list_del(&dev->catas_err.list); 183 spin_unlock_irq(&catas_lock); 184 } 185 186 int __init mthca_catas_init(void) 187 { 188 INIT_WORK(&catas_work, catas_reset); 189 190 catas_wq = alloc_ordered_workqueue("mthca_catas", WQ_MEM_RECLAIM); 191 if (!catas_wq) 192 return -ENOMEM; 193 194 return 0; 195 } 196 197 void mthca_catas_cleanup(void) 198 { 199 destroy_workqueue(catas_wq); 200 } 201