drivers/infiniband/hw/mthca/mthca_catas.c

   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  * $Id$
  33  */
  34
  35 #include <linux/jiffies.h>
  36 #include <linux/timer.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 void handle_catas(struct mthca_dev *dev)
  52 {
  53         struct ib_event event;
  54         const char *type;
  55         int i;
  56
  57         event.device = &dev->ib_dev;
  58         event.event  = IB_EVENT_DEVICE_FATAL;
  59         event.element.port_num = 0;
  60
  61         ib_dispatch_event(&event);
  62
  63         switch (swab32(readl(dev->catas_err.map)) >> 24) {
  64         case MTHCA_CATAS_TYPE_INTERNAL:
  65                 type = "internal error";
  66                 break;
  67         case MTHCA_CATAS_TYPE_UPLINK:
  68                 type = "uplink bus error";
  69                 break;
  70         case MTHCA_CATAS_TYPE_DDR:
  71                 type = "DDR data error";
  72                 break;
  73         case MTHCA_CATAS_TYPE_PARITY:
  74                 type = "internal parity error";
  75                 break;
  76         default:
  77                 type = "unknown error";
  78                 break;
  79         }
  80
  81         mthca_err(dev, "Catastrophic error detected: %s\n", type);
  82         for (i = 0; i < dev->catas_err.size; ++i)
  83                 mthca_err(dev, "  buf[%02x]: %08x\n",
  84                           i, swab32(readl(dev->catas_err.map + i)));
  85 }
  86
  87 static void poll_catas(unsigned long dev_ptr)
  88 {
  89         struct mthca_dev *dev = (struct mthca_dev *) dev_ptr;
  90         unsigned long flags;
  91         int i;
  92
  93         for (i = 0; i < dev->catas_err.size; ++i)
  94                 if (readl(dev->catas_err.map + i)) {
  95                         handle_catas(dev);
  96                         return;
  97                 }
  98
  99         spin_lock_irqsave(&catas_lock, flags);
 100         if (!dev->catas_err.stop)
 101                 mod_timer(&dev->catas_err.timer,
 102                           jiffies + MTHCA_CATAS_POLL_INTERVAL);
 103         spin_unlock_irqrestore(&catas_lock, flags);
 104
 105         return;
 106 }
 107
 108 void mthca_start_catas_poll(struct mthca_dev *dev)
 109 {
 110         unsigned long addr;
 111
 112         init_timer(&dev->catas_err.timer);
 113         dev->catas_err.stop = 0;
 114         dev->catas_err.map  = NULL;
 115
 116         addr = pci_resource_start(dev->pdev, 0) +
 117                 ((pci_resource_len(dev->pdev, 0) - 1) &
 118                  dev->catas_err.addr);
 119
 120         if (!request_mem_region(addr, dev->catas_err.size * 4,
 121                                 DRV_NAME)) {
 122                 mthca_warn(dev, "couldn't request catastrophic error region "
 123                            "at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4);
 124                 return;
 125         }
 126
 127         dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4);
 128         if (!dev->catas_err.map) {
 129                 mthca_warn(dev, "couldn't map catastrophic error region "
 130                            "at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4);
 131                 release_mem_region(addr, dev->catas_err.size * 4);
 132                 return;
 133         }
 134
 135         dev->catas_err.timer.data     = (unsigned long) dev;
 136         dev->catas_err.timer.function = poll_catas;
 137         dev->catas_err.timer.expires  = jiffies + MTHCA_CATAS_POLL_INTERVAL;
 138         add_timer(&dev->catas_err.timer);
 139 }
 140
 141 void mthca_stop_catas_poll(struct mthca_dev *dev)
 142 {
 143         spin_lock_irq(&catas_lock);
 144         dev->catas_err.stop = 1;
 145         spin_unlock_irq(&catas_lock);
 146
 147         del_timer_sync(&dev->catas_err.timer);
 148
 149         if (dev->catas_err.map) {
 150                 iounmap(dev->catas_err.map);
 151                 release_mem_region(pci_resource_start(dev->pdev, 0) +
 152                                    ((pci_resource_len(dev->pdev, 0) - 1) &
 153                                     dev->catas_err.addr),
 154                                    dev->catas_err.size * 4);
 155         }
 156 }