/* * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/workqueue.h> #include "mlx4.h" enum { MLX4_CATAS_POLL_INTERVAL = 5 * HZ, }; static DEFINE_SPINLOCK(catas_lock); static LIST_HEAD(catas_list); static struct workqueue_struct *catas_wq; static struct work_struct catas_work; static int internal_err_reset = 1; module_param(internal_err_reset, int, 0644); MODULE_PARM_DESC(internal_err_reset, "Reset device on internal errors if non-zero (default 1)"); static void dump_err_buf(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); int i; mlx4_err(dev, "Internal error detected:\n"); for (i = 0; i < priv->fw.catas_size; ++i) mlx4_err(dev, " buf[%02x]: %08x\n", i, swab32(readl(priv->catas_err.map + i))); } static void poll_catas(unsigned long dev_ptr) { struct mlx4_dev *dev = (struct mlx4_dev *) dev_ptr; struct mlx4_priv *priv = mlx4_priv(dev); if (readl(priv->catas_err.map)) { dump_err_buf(dev); mlx4_dispatch_event(dev, MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR, 0, 0); if (internal_err_reset) { spin_lock(&catas_lock); list_add(&priv->catas_err.list, &catas_list); spin_unlock(&catas_lock); queue_work(catas_wq, &catas_work); } } else mod_timer(&priv->catas_err.timer, round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL)); } static void catas_reset(struct work_struct *work) { struct mlx4_priv *priv, *tmppriv; struct mlx4_dev *dev; LIST_HEAD(tlist); int ret; spin_lock_irq(&catas_lock); list_splice_init(&catas_list, &tlist); spin_unlock_irq(&catas_lock); list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) { ret = mlx4_restart_one(priv->dev.pdev); dev = &priv->dev; if (ret) mlx4_err(dev, "Reset failed (%d)\n", ret); else mlx4_dbg(dev, "Reset succeeded\n"); } } void mlx4_start_catas_poll(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); unsigned long addr; INIT_LIST_HEAD(&priv->catas_err.list); init_timer(&priv->catas_err.timer); priv->catas_err.map = NULL; addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) + priv->fw.catas_offset; priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4); if (!priv->catas_err.map) { mlx4_warn(dev, "Failed to map internal error buffer at 0x%lx\n", addr); return; } priv->catas_err.timer.data = (unsigned long) dev; priv->catas_err.timer.function = poll_catas; priv->catas_err.timer.expires = round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL); add_timer(&priv->catas_err.timer); } void mlx4_stop_catas_poll(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); del_timer_sync(&priv->catas_err.timer); if (priv->catas_err.map) iounmap(priv->catas_err.map); spin_lock_irq(&catas_lock); list_del(&priv->catas_err.list); spin_unlock_irq(&catas_lock); } int __init mlx4_catas_init(void) { INIT_WORK(&catas_work, catas_reset); catas_wq = create_singlethread_workqueue("mlx4_err"); if (!catas_wq) return -ENOMEM; return 0; } void mlx4_catas_cleanup(void) { destroy_workqueue(catas_wq); }