mthca_catas.c

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    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 #define LINUXKPI_PARAM_PREFIX mthca_
   34 
   35 #include <linux/jiffies.h>
   36 #include <linux/module.h>
   37 #include <linux/timer.h>
   38 #include <linux/workqueue.h>
   39 
   40 #include "mthca_dev.h"
   41 
   42 #define MTHCA_CATAS_POLL_INTERVAL       (5 * HZ)
   43 
   44 enum {
   45         MTHCA_CATAS_TYPE_INTERNAL       = 0,
   46         MTHCA_CATAS_TYPE_UPLINK         = 3,
   47         MTHCA_CATAS_TYPE_DDR            = 4,
   48         MTHCA_CATAS_TYPE_PARITY         = 5,
   49 };
   50 
   51 static DEFINE_SPINLOCK(catas_lock);
   52 
   53 static LIST_HEAD(catas_list);
   54 static struct workqueue_struct *catas_wq;
   55 static struct work_struct catas_work;
   56 
   57 static int catas_reset_disable;
   58 module_param_named(catas_reset_disable, catas_reset_disable, int, 0644);
   59 MODULE_PARM_DESC(catas_reset_disable, "disable reset on catastrophic event if nonzero");
   60 
   61 static void catas_reset(struct work_struct *work)
   62 {
   63         struct mthca_dev *dev, *tmpdev;
   64         LIST_HEAD(tlist);
   65         int ret;
   66 
   67         mutex_lock(&mthca_device_mutex);
   68 
   69         spin_lock_irq(&catas_lock);
   70         list_splice_init(&catas_list, &tlist);
   71         spin_unlock_irq(&catas_lock);
   72 
   73         list_for_each_entry_safe(dev, tmpdev, &tlist, catas_err.list) {
   74                 struct pci_dev *pdev = dev->pdev;
   75                 ret = __mthca_restart_one(dev->pdev);
   76                 /* 'dev' now is not valid */
   77                 if (ret)
   78                         printk(KERN_ERR "mthca %s: Reset failed (%d)\n",
   79                                pci_name(pdev), ret);
   80                 else {
   81                         struct mthca_dev *d = pci_get_drvdata(pdev);
   82                         mthca_dbg(d, "Reset succeeded\n");
   83                 }
   84         }
   85 
   86         mutex_unlock(&mthca_device_mutex);
   87 }
   88 
   89 static void handle_catas(struct mthca_dev *dev)
   90 {
   91         struct ib_event event;
   92         unsigned long flags;
   93         const char *type;
   94         int i;
   95 
   96         event.device = &dev->ib_dev;
   97         event.event  = IB_EVENT_DEVICE_FATAL;
   98         event.element.port_num = 0;
   99         dev->active = false;
  100 
  101         ib_dispatch_event(&event);
  102 
  103         switch (swab32(readl(dev->catas_err.map)) >> 24) {
  104         case MTHCA_CATAS_TYPE_INTERNAL:
  105                 type = "internal error";
  106                 break;
  107         case MTHCA_CATAS_TYPE_UPLINK:
  108                 type = "uplink bus error";
  109                 break;
  110         case MTHCA_CATAS_TYPE_DDR:
  111                 type = "DDR data error";
  112                 break;
  113         case MTHCA_CATAS_TYPE_PARITY:
  114                 type = "internal parity error";
  115                 break;
  116         default:
  117                 type = "unknown error";
  118                 break;
  119         }
  120 
  121         mthca_err(dev, "Catastrophic error detected: %s\n", type);
  122         for (i = 0; i < dev->catas_err.size; ++i)
  123                 mthca_err(dev, "  buf[%02x]: %08x\n",
  124                           i, swab32(readl(dev->catas_err.map + i)));
  125 
  126         if (catas_reset_disable)
  127                 return;
  128 
  129         spin_lock_irqsave(&catas_lock, flags);
  130         list_add(&dev->catas_err.list, &catas_list);
  131         queue_work(catas_wq, &catas_work);
  132         spin_unlock_irqrestore(&catas_lock, flags);
  133 }
  134 
  135 static void poll_catas(unsigned long dev_ptr)
  136 {
  137         struct mthca_dev *dev = (struct mthca_dev *) dev_ptr;
  138         int i;
  139 
  140         for (i = 0; i < dev->catas_err.size; ++i)
  141                 if (readl(dev->catas_err.map + i)) {
  142                         handle_catas(dev);
  143                         return;
  144                 }
  145 
  146         mod_timer(&dev->catas_err.timer,
  147                   round_jiffies(jiffies + MTHCA_CATAS_POLL_INTERVAL));
  148 }
  149 
  150 void mthca_start_catas_poll(struct mthca_dev *dev)
  151 {
  152         phys_addr_t addr;
  153 
  154         init_timer(&dev->catas_err.timer);
  155         dev->catas_err.map  = NULL;
  156 
  157         addr = pci_resource_start(dev->pdev, 0) +
  158                 ((pci_resource_len(dev->pdev, 0) - 1) &
  159                  dev->catas_err.addr);
  160 
  161         dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4);
  162         if (!dev->catas_err.map) {
  163                 mthca_warn(dev, "couldn't map catastrophic error region "
  164                            "at 0x%llx/0x%x\n", (unsigned long long) addr,
  165                            dev->catas_err.size * 4);
  166                 return;
  167         }
  168 
  169         dev->catas_err.timer.data     = (unsigned long) dev;
  170         dev->catas_err.timer.function = poll_catas;
  171         dev->catas_err.timer.expires  = jiffies + MTHCA_CATAS_POLL_INTERVAL;
  172         INIT_LIST_HEAD(&dev->catas_err.list);
  173         add_timer(&dev->catas_err.timer);
  174 }
  175 
  176 void mthca_stop_catas_poll(struct mthca_dev *dev)
  177 {
  178         del_timer_sync(&dev->catas_err.timer);
  179 
  180         if (dev->catas_err.map)
  181                 iounmap(dev->catas_err.map);
  182 
  183         spin_lock_irq(&catas_lock);
  184         list_del(&dev->catas_err.list);
  185         spin_unlock_irq(&catas_lock);
  186 }
  187 
  188 int __init mthca_catas_init(void)
  189 {
  190         INIT_WORK(&catas_work, catas_reset);
  191 
  192         catas_wq = alloc_ordered_workqueue("mthca_catas", WQ_MEM_RECLAIM);
  193         if (!catas_wq)
  194                 return -ENOMEM;
  195 
  196         return 0;
  197 }
  198 
  199 void mthca_catas_cleanup(void)
  200 {
  201         destroy_workqueue(catas_wq);
  202 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/mthca/mthca_catas.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mthca/mthca_catas.c