3d155f8cd0
Add some initial support for detecting and reporting catastrophic errors reported by Mellanox HCAs. We start a periodic timer which polls the catastrophic error reporting buffer in device memory. If an error is detected, we dump the contents of the buffer for port-mortem debugging, and report a fatal asynchronous error to higher levels. In the future we can try to recover from these errors by resetting the device, but this will require some work in higher-level code as well. Let's get this in now, so that we at least get catastrophic errors reported in logs. Signed-off-by: Roland Dreier <rolandd@cisco.com>
154 lines
4.2 KiB
C
154 lines
4.2 KiB
C
/*
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* Copyright (c) 2005 Cisco Systems. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id$
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*/
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#include "mthca_dev.h"
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enum {
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MTHCA_CATAS_POLL_INTERVAL = 5 * HZ,
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MTHCA_CATAS_TYPE_INTERNAL = 0,
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MTHCA_CATAS_TYPE_UPLINK = 3,
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MTHCA_CATAS_TYPE_DDR = 4,
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MTHCA_CATAS_TYPE_PARITY = 5,
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};
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static DEFINE_SPINLOCK(catas_lock);
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static void handle_catas(struct mthca_dev *dev)
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{
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struct ib_event event;
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const char *type;
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int i;
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event.device = &dev->ib_dev;
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event.event = IB_EVENT_DEVICE_FATAL;
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event.element.port_num = 0;
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ib_dispatch_event(&event);
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switch (swab32(readl(dev->catas_err.map)) >> 24) {
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case MTHCA_CATAS_TYPE_INTERNAL:
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type = "internal error";
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break;
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case MTHCA_CATAS_TYPE_UPLINK:
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type = "uplink bus error";
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break;
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case MTHCA_CATAS_TYPE_DDR:
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type = "DDR data error";
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break;
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case MTHCA_CATAS_TYPE_PARITY:
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type = "internal parity error";
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break;
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default:
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type = "unknown error";
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break;
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}
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mthca_err(dev, "Catastrophic error detected: %s\n", type);
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for (i = 0; i < dev->catas_err.size; ++i)
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mthca_err(dev, " buf[%02x]: %08x\n",
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i, swab32(readl(dev->catas_err.map + i)));
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}
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static void poll_catas(unsigned long dev_ptr)
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{
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struct mthca_dev *dev = (struct mthca_dev *) dev_ptr;
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unsigned long flags;
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int i;
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for (i = 0; i < dev->catas_err.size; ++i)
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if (readl(dev->catas_err.map + i)) {
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handle_catas(dev);
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return;
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}
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spin_lock_irqsave(&catas_lock, flags);
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if (dev->catas_err.stop)
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mod_timer(&dev->catas_err.timer,
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jiffies + MTHCA_CATAS_POLL_INTERVAL);
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spin_unlock_irqrestore(&catas_lock, flags);
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return;
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}
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void mthca_start_catas_poll(struct mthca_dev *dev)
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{
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unsigned long addr;
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init_timer(&dev->catas_err.timer);
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dev->catas_err.stop = 0;
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dev->catas_err.map = NULL;
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addr = pci_resource_start(dev->pdev, 0) +
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((pci_resource_len(dev->pdev, 0) - 1) &
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dev->catas_err.addr);
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if (!request_mem_region(addr, dev->catas_err.size * 4,
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DRV_NAME)) {
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mthca_warn(dev, "couldn't request catastrophic error region "
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"at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4);
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return;
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}
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dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4);
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if (!dev->catas_err.map) {
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mthca_warn(dev, "couldn't map catastrophic error region "
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"at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4);
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release_mem_region(addr, dev->catas_err.size * 4);
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return;
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}
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dev->catas_err.timer.data = (unsigned long) dev;
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dev->catas_err.timer.function = poll_catas;
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dev->catas_err.timer.expires = jiffies + MTHCA_CATAS_POLL_INTERVAL;
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add_timer(&dev->catas_err.timer);
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}
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void mthca_stop_catas_poll(struct mthca_dev *dev)
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{
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spin_lock_irq(&catas_lock);
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dev->catas_err.stop = 1;
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spin_unlock_irq(&catas_lock);
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del_timer_sync(&dev->catas_err.timer);
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if (dev->catas_err.map) {
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iounmap(dev->catas_err.map);
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release_mem_region(pci_resource_start(dev->pdev, 0) +
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((pci_resource_len(dev->pdev, 0) - 1) &
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dev->catas_err.addr),
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dev->catas_err.size * 4);
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}
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}
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